drivers/net/wireless/iwlwifi/iwl3945-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/version.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/delay.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/ieee80211_radiotap.h>
  45 #include <net/mac80211.h>
  46
  47 #include <asm/div64.h>
  48
  49 #include "iwl-3945.h"
  50 #include "iwl-helpers.h"
  51
  52 #ifdef CONFIG_IWL3945_DEBUG
  53 u32 iwl3945_debug_level;
  54 #endif
  55
  56 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
  57                                   struct iwl3945_tx_queue *txq);
  58
  59 /******************************************************************************
  60  *
  61  * module boiler plate
  62  *
  63  ******************************************************************************/
  64
  65 /* module parameters */
  66 static int iwl3945_param_disable_hw_scan; /* def: 0 = use 3945's h/w scan */
  67 static int iwl3945_param_debug;    /* def: 0 = minimal debug log messages */
  68 static int iwl3945_param_disable;  /* def: 0 = enable radio */
  69 static int iwl3945_param_antenna;  /* def: 0 = both antennas (use diversity) */
  70 int iwl3945_param_hwcrypto;        /* def: 0 = use software encryption */
  71 static int iwl3945_param_qos_enable = 1; /* def: 1 = use quality of service */
  72 int iwl3945_param_queues_num = IWL_MAX_NUM_QUEUES; /* def: 8 Tx queues */
  73
  74 /*
  75  * module name, copyright, version, etc.
  76  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  77  */
  78
  79 #define DRV_DESCRIPTION \
  80 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  81
  82 #ifdef CONFIG_IWL3945_DEBUG
  83 #define VD "d"
  84 #else
  85 #define VD
  86 #endif
  87
  88 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  89 #define VS "s"
  90 #else
  91 #define VS
  92 #endif
  93
  94 #define IWLWIFI_VERSION "1.2.22k" VD VS
  95 #define DRV_COPYRIGHT   "Copyright(c) 2003-2007 Intel Corporation"
  96 #define DRV_VERSION     IWLWIFI_VERSION
  97
  98 /* Change firmware file name, using "-" and incrementing number,
  99  *   *only* when uCode interface or architecture changes so that it
 100  *   is not compatible with earlier drivers.
 101  * This number will also appear in << 8 position of 1st dword of uCode file */
 102 #define IWL3945_UCODE_API "-1"
 103
 104 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 105 MODULE_VERSION(DRV_VERSION);
 106 MODULE_AUTHOR(DRV_COPYRIGHT);
 107 MODULE_LICENSE("GPL");
 108
 109 static __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 110 {
 111         u16 fc = le16_to_cpu(hdr->frame_control);
 112         int hdr_len = ieee80211_get_hdrlen(fc);
 113
 114         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 115                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 116         return NULL;
 117 }
 118
 119 static const struct ieee80211_hw_mode *iwl3945_get_hw_mode(
 120                 struct iwl3945_priv *priv, int mode)
 121 {
 122         int i;
 123
 124         for (i = 0; i < 3; i++)
 125                 if (priv->modes[i].mode == mode)
 126                         return &priv->modes[i];
 127
 128         return NULL;
 129 }
 130
 131 static int iwl3945_is_empty_essid(const char *essid, int essid_len)
 132 {
 133         /* Single white space is for Linksys APs */
 134         if (essid_len == 1 && essid[0] == ' ')
 135                 return 1;
 136
 137         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 138         while (essid_len) {
 139                 essid_len--;
 140                 if (essid[essid_len] != '\0')
 141                         return 0;
 142         }
 143
 144         return 1;
 145 }
 146
 147 static const char *iwl3945_escape_essid(const char *essid, u8 essid_len)
 148 {
 149         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 150         const char *s = essid;
 151         char *d = escaped;
 152
 153         if (iwl3945_is_empty_essid(essid, essid_len)) {
 154                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 155                 return escaped;
 156         }
 157
 158         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 159         while (essid_len--) {
 160                 if (*s == '\0') {
 161                         *d++ = '\\';
 162                         *d++ = '0';
 163                         s++;
 164                 } else
 165                         *d++ = *s++;
 166         }
 167         *d = '\0';
 168         return escaped;
 169 }
 170
 171 static void iwl3945_print_hex_dump(int level, void *p, u32 len)
 172 {
 173 #ifdef CONFIG_IWL3945_DEBUG
 174         if (!(iwl3945_debug_level & level))
 175                 return;
 176
 177         print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
 178                         p, len, 1);
 179 #endif
 180 }
 181
 182 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 183  * DMA services
 184  *
 185  * Theory of operation
 186  *
 187  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 188  * of buffer descriptors, each of which points to one or more data buffers for
 189  * the device to read from or fill.  Driver and device exchange status of each
 190  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 191  * entries in each circular buffer, to protect against confusing empty and full
 192  * queue states.
 193  *
 194  * The device reads or writes the data in the queues via the device's several
 195  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 196  *
 197  * For Tx queue, there are low mark and high mark limits. If, after queuing
 198  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 199  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 200  * Tx queue resumed.
 201  *
 202  * The 3945 operates with six queues:  One receive queue, one transmit queue
 203  * (#4) for sending commands to the device firmware, and four transmit queues
 204  * (#0-3) for data tx via EDCA.  An additional 2 HCCA queues are unused.
 205  ***************************************************/
 206
 207 static int iwl3945_queue_space(const struct iwl3945_queue *q)
 208 {
 209         int s = q->read_ptr - q->write_ptr;
 210
 211         if (q->read_ptr > q->write_ptr)
 212                 s -= q->n_bd;
 213
 214         if (s <= 0)
 215                 s += q->n_window;
 216         /* keep some reserve to not confuse empty and full situations */
 217         s -= 2;
 218         if (s < 0)
 219                 s = 0;
 220         return s;
 221 }
 222
 223 /**
 224  * iwl3945_queue_inc_wrap - increment queue index, wrap back to beginning
 225  * @index -- current index
 226  * @n_bd -- total number of entries in queue (must be power of 2)
 227  */
 228 static inline int iwl3945_queue_inc_wrap(int index, int n_bd)
 229 {
 230         return ++index & (n_bd - 1);
 231 }
 232
 233 /**
 234  * iwl3945_queue_dec_wrap - increment queue index, wrap back to end
 235  * @index -- current index
 236  * @n_bd -- total number of entries in queue (must be power of 2)
 237  */
 238 static inline int iwl3945_queue_dec_wrap(int index, int n_bd)
 239 {
 240         return --index & (n_bd - 1);
 241 }
 242
 243 static inline int x2_queue_used(const struct iwl3945_queue *q, int i)
 244 {
 245         return q->write_ptr > q->read_ptr ?
 246                 (i >= q->read_ptr && i < q->write_ptr) :
 247                 !(i < q->read_ptr && i >= q->write_ptr);
 248 }
 249
 250 static inline u8 get_cmd_index(struct iwl3945_queue *q, u32 index, int is_huge)
 251 {
 252         /* This is for scan command, the big buffer at end of command array */
 253         if (is_huge)
 254                 return q->n_window;     /* must be power of 2 */
 255
 256         /* Otherwise, use normal size buffers */
 257         return index & (q->n_window - 1);
 258 }
 259
 260 /**
 261  * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes
 262  */
 263 static int iwl3945_queue_init(struct iwl3945_priv *priv, struct iwl3945_queue *q,
 264                           int count, int slots_num, u32 id)
 265 {
 266         q->n_bd = count;
 267         q->n_window = slots_num;
 268         q->id = id;
 269
 270         /* count must be power-of-two size, otherwise iwl3945_queue_inc_wrap
 271          * and iwl3945_queue_dec_wrap are broken. */
 272         BUG_ON(!is_power_of_2(count));
 273
 274         /* slots_num must be power-of-two size, otherwise
 275          * get_cmd_index is broken. */
 276         BUG_ON(!is_power_of_2(slots_num));
 277
 278         q->low_mark = q->n_window / 4;
 279         if (q->low_mark < 4)
 280                 q->low_mark = 4;
 281
 282         q->high_mark = q->n_window / 8;
 283         if (q->high_mark < 2)
 284                 q->high_mark = 2;
 285
 286         q->write_ptr = q->read_ptr = 0;
 287
 288         return 0;
 289 }
 290
 291 /**
 292  * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 293  */
 294 static int iwl3945_tx_queue_alloc(struct iwl3945_priv *priv,
 295                               struct iwl3945_tx_queue *txq, u32 id)
 296 {
 297         struct pci_dev *dev = priv->pci_dev;
 298
 299         /* Driver private data, only for Tx (not command) queues,
 300          * not shared with device. */
 301         if (id != IWL_CMD_QUEUE_NUM) {
 302                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 303                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 304                 if (!txq->txb) {
 305                         IWL_ERROR("kmalloc for auxiliary BD "
 306                                   "structures failed\n");
 307                         goto error;
 308                 }
 309         } else
 310                 txq->txb = NULL;
 311
 312         /* Circular buffer of transmit frame descriptors (TFDs),
 313          * shared with device */
 314         txq->bd = pci_alloc_consistent(dev,
 315                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 316                         &txq->q.dma_addr);
 317
 318         if (!txq->bd) {
 319                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 320                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 321                 goto error;
 322         }
 323         txq->q.id = id;
 324
 325         return 0;
 326
 327  error:
 328         if (txq->txb) {
 329                 kfree(txq->txb);
 330                 txq->txb = NULL;
 331         }
 332
 333         return -ENOMEM;
 334 }
 335
 336 /**
 337  * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue
 338  */
 339 int iwl3945_tx_queue_init(struct iwl3945_priv *priv,
 340                       struct iwl3945_tx_queue *txq, int slots_num, u32 txq_id)
 341 {
 342         struct pci_dev *dev = priv->pci_dev;
 343         int len;
 344         int rc = 0;
 345
 346         /*
 347          * Alloc buffer array for commands (Tx or other types of commands).
 348          * For the command queue (#4), allocate command space + one big
 349          * command for scan, since scan command is very huge; the system will
 350          * not have two scans at the same time, so only one is needed.
 351          * For data Tx queues (all other queues), no super-size command
 352          * space is needed.
 353          */
 354         len = sizeof(struct iwl3945_cmd) * slots_num;
 355         if (txq_id == IWL_CMD_QUEUE_NUM)
 356                 len +=  IWL_MAX_SCAN_SIZE;
 357         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 358         if (!txq->cmd)
 359                 return -ENOMEM;
 360
 361         /* Alloc driver data array and TFD circular buffer */
 362         rc = iwl3945_tx_queue_alloc(priv, txq, txq_id);
 363         if (rc) {
 364                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 365
 366                 return -ENOMEM;
 367         }
 368         txq->need_update = 0;
 369
 370         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 371          * iwl3945_queue_inc_wrap and iwl3945_queue_dec_wrap are broken. */
 372         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 373
 374         /* Initialize queue high/low-water, head/tail indexes */
 375         iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 376
 377         /* Tell device where to find queue, enable DMA channel. */
 378         iwl3945_hw_tx_queue_init(priv, txq);
 379
 380         return 0;
 381 }
 382
 383 /**
 384  * iwl3945_tx_queue_free - Deallocate DMA queue.
 385  * @txq: Transmit queue to deallocate.
 386  *
 387  * Empty queue by removing and destroying all BD's.
 388  * Free all buffers.
 389  * 0-fill, but do not free "txq" descriptor structure.
 390  */
 391 void iwl3945_tx_queue_free(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 392 {
 393         struct iwl3945_queue *q = &txq->q;
 394         struct pci_dev *dev = priv->pci_dev;
 395         int len;
 396
 397         if (q->n_bd == 0)
 398                 return;
 399
 400         /* first, empty all BD's */
 401         for (; q->write_ptr != q->read_ptr;
 402              q->read_ptr = iwl3945_queue_inc_wrap(q->read_ptr, q->n_bd))
 403                 iwl3945_hw_txq_free_tfd(priv, txq);
 404
 405         len = sizeof(struct iwl3945_cmd) * q->n_window;
 406         if (q->id == IWL_CMD_QUEUE_NUM)
 407                 len += IWL_MAX_SCAN_SIZE;
 408
 409         /* De-alloc array of command/tx buffers */
 410         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 411
 412         /* De-alloc circular buffer of TFDs */
 413         if (txq->q.n_bd)
 414                 pci_free_consistent(dev, sizeof(struct iwl3945_tfd_frame) *
 415                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 416
 417         /* De-alloc array of per-TFD driver data */
 418         if (txq->txb) {
 419                 kfree(txq->txb);
 420                 txq->txb = NULL;
 421         }
 422
 423         /* 0-fill queue descriptor structure */
 424         memset(txq, 0, sizeof(*txq));
 425 }
 426
 427 const u8 iwl3945_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 428
 429 /*************** STATION TABLE MANAGEMENT ****
 430  * mac80211 should be examined to determine if sta_info is duplicating
 431  * the functionality provided here
 432  */
 433
 434 /**************************************************************/
 435 #if 0 /* temporary disable till we add real remove station */
 436 /**
 437  * iwl3945_remove_station - Remove driver's knowledge of station.
 438  *
 439  * NOTE:  This does not remove station from device's station table.
 440  */
 441 static u8 iwl3945_remove_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap)
 442 {
 443         int index = IWL_INVALID_STATION;
 444         int i;
 445         unsigned long flags;
 446
 447         spin_lock_irqsave(&priv->sta_lock, flags);
 448
 449         if (is_ap)
 450                 index = IWL_AP_ID;
 451         else if (is_broadcast_ether_addr(addr))
 452                 index = priv->hw_setting.bcast_sta_id;
 453         else
 454                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 455                         if (priv->stations[i].used &&
 456                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 457                                                 addr)) {
 458                                 index = i;
 459                                 break;
 460                         }
 461
 462         if (unlikely(index == IWL_INVALID_STATION))
 463                 goto out;
 464
 465         if (priv->stations[index].used) {
 466                 priv->stations[index].used = 0;
 467                 priv->num_stations--;
 468         }
 469
 470         BUG_ON(priv->num_stations < 0);
 471
 472 out:
 473         spin_unlock_irqrestore(&priv->sta_lock, flags);
 474         return 0;
 475 }
 476 #endif
 477
 478 /**
 479  * iwl3945_clear_stations_table - Clear the driver's station table
 480  *
 481  * NOTE:  This does not clear or otherwise alter the device's station table.
 482  */
 483 static void iwl3945_clear_stations_table(struct iwl3945_priv *priv)
 484 {
 485         unsigned long flags;
 486
 487         spin_lock_irqsave(&priv->sta_lock, flags);
 488
 489         priv->num_stations = 0;
 490         memset(priv->stations, 0, sizeof(priv->stations));
 491
 492         spin_unlock_irqrestore(&priv->sta_lock, flags);
 493 }
 494
 495 /**
 496  * iwl3945_add_station - Add station to station tables in driver and device
 497  */
 498 u8 iwl3945_add_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap, u8 flags)
 499 {
 500         int i;
 501         int index = IWL_INVALID_STATION;
 502         struct iwl3945_station_entry *station;
 503         unsigned long flags_spin;
 504         DECLARE_MAC_BUF(mac);
 505         u8 rate;
 506
 507         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 508         if (is_ap)
 509                 index = IWL_AP_ID;
 510         else if (is_broadcast_ether_addr(addr))
 511                 index = priv->hw_setting.bcast_sta_id;
 512         else
 513                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 514                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 515                                                 addr)) {
 516                                 index = i;
 517                                 break;
 518                         }
 519
 520                         if (!priv->stations[i].used &&
 521                             index == IWL_INVALID_STATION)
 522                                 index = i;
 523                 }
 524
 525         /* These two conditions has the same outcome but keep them separate
 526           since they have different meaning */
 527         if (unlikely(index == IWL_INVALID_STATION)) {
 528                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 529                 return index;
 530         }
 531
 532         if (priv->stations[index].used &&
 533            !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 534                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 535                 return index;
 536         }
 537
 538         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 539         station = &priv->stations[index];
 540         station->used = 1;
 541         priv->num_stations++;
 542
 543         /* Set up the REPLY_ADD_STA command to send to device */
 544         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 545         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 546         station->sta.mode = 0;
 547         station->sta.sta.sta_id = index;
 548         station->sta.station_flags = 0;
 549
 550         if (priv->phymode == MODE_IEEE80211A)
 551                 rate = IWL_RATE_6M_PLCP;
 552         else
 553                 rate =  IWL_RATE_1M_PLCP;
 554
 555         /* Turn on both antennas for the station... */
 556         station->sta.rate_n_flags =
 557                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 558         station->current_rate.rate_n_flags =
 559                         le16_to_cpu(station->sta.rate_n_flags);
 560
 561         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 562
 563         /* Add station to device's station table */
 564         iwl3945_send_add_station(priv, &station->sta, flags);
 565         return index;
 566
 567 }
 568
 569 /*************** DRIVER STATUS FUNCTIONS   *****/
 570
 571 static inline int iwl3945_is_ready(struct iwl3945_priv *priv)
 572 {
 573         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 574          * set but EXIT_PENDING is not */
 575         return test_bit(STATUS_READY, &priv->status) &&
 576                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 577                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 578 }
 579
 580 static inline int iwl3945_is_alive(struct iwl3945_priv *priv)
 581 {
 582         return test_bit(STATUS_ALIVE, &priv->status);
 583 }
 584
 585 static inline int iwl3945_is_init(struct iwl3945_priv *priv)
 586 {
 587         return test_bit(STATUS_INIT, &priv->status);
 588 }
 589
 590 static inline int iwl3945_is_rfkill(struct iwl3945_priv *priv)
 591 {
 592         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 593                test_bit(STATUS_RF_KILL_SW, &priv->status);
 594 }
 595
 596 static inline int iwl3945_is_ready_rf(struct iwl3945_priv *priv)
 597 {
 598
 599         if (iwl3945_is_rfkill(priv))
 600                 return 0;
 601
 602         return iwl3945_is_ready(priv);
 603 }
 604
 605 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 606
 607 #define IWL_CMD(x) case x : return #x
 608
 609 static const char *get_cmd_string(u8 cmd)
 610 {
 611         switch (cmd) {
 612                 IWL_CMD(REPLY_ALIVE);
 613                 IWL_CMD(REPLY_ERROR);
 614                 IWL_CMD(REPLY_RXON);
 615                 IWL_CMD(REPLY_RXON_ASSOC);
 616                 IWL_CMD(REPLY_QOS_PARAM);
 617                 IWL_CMD(REPLY_RXON_TIMING);
 618                 IWL_CMD(REPLY_ADD_STA);
 619                 IWL_CMD(REPLY_REMOVE_STA);
 620                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 621                 IWL_CMD(REPLY_3945_RX);
 622                 IWL_CMD(REPLY_TX);
 623                 IWL_CMD(REPLY_RATE_SCALE);
 624                 IWL_CMD(REPLY_LEDS_CMD);
 625                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 626                 IWL_CMD(RADAR_NOTIFICATION);
 627                 IWL_CMD(REPLY_QUIET_CMD);
 628                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 629                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 630                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 631                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 632                 IWL_CMD(POWER_TABLE_CMD);
 633                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 634                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 635                 IWL_CMD(REPLY_SCAN_CMD);
 636                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 637                 IWL_CMD(SCAN_START_NOTIFICATION);
 638                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 639                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 640                 IWL_CMD(BEACON_NOTIFICATION);
 641                 IWL_CMD(REPLY_TX_BEACON);
 642                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 643                 IWL_CMD(QUIET_NOTIFICATION);
 644                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 645                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 646                 IWL_CMD(REPLY_BT_CONFIG);
 647                 IWL_CMD(REPLY_STATISTICS_CMD);
 648                 IWL_CMD(STATISTICS_NOTIFICATION);
 649                 IWL_CMD(REPLY_CARD_STATE_CMD);
 650                 IWL_CMD(CARD_STATE_NOTIFICATION);
 651                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 652         default:
 653                 return "UNKNOWN";
 654
 655         }
 656 }
 657
 658 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 659
 660 /**
 661  * iwl3945_enqueue_hcmd - enqueue a uCode command
 662  * @priv: device private data point
 663  * @cmd: a point to the ucode command structure
 664  *
 665  * The function returns < 0 values to indicate the operation is
 666  * failed. On success, it turns the index (> 0) of command in the
 667  * command queue.
 668  */
 669 static int iwl3945_enqueue_hcmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 670 {
 671         struct iwl3945_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 672         struct iwl3945_queue *q = &txq->q;
 673         struct iwl3945_tfd_frame *tfd;
 674         u32 *control_flags;
 675         struct iwl3945_cmd *out_cmd;
 676         u32 idx;
 677         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 678         dma_addr_t phys_addr;
 679         int pad;
 680         u16 count;
 681         int ret;
 682         unsigned long flags;
 683
 684         /* If any of the command structures end up being larger than
 685          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 686          * we will need to increase the size of the TFD entries */
 687         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 688                !(cmd->meta.flags & CMD_SIZE_HUGE));
 689
 690         if (iwl3945_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 691                 IWL_ERROR("No space for Tx\n");
 692                 return -ENOSPC;
 693         }
 694
 695         spin_lock_irqsave(&priv->hcmd_lock, flags);
 696
 697         tfd = &txq->bd[q->write_ptr];
 698         memset(tfd, 0, sizeof(*tfd));
 699
 700         control_flags = (u32 *) tfd;
 701
 702         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 703         out_cmd = &txq->cmd[idx];
 704
 705         out_cmd->hdr.cmd = cmd->id;
 706         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 707         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 708
 709         /* At this point, the out_cmd now has all of the incoming cmd
 710          * information */
 711
 712         out_cmd->hdr.flags = 0;
 713         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 714                         INDEX_TO_SEQ(q->write_ptr));
 715         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 716                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 717
 718         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 719                         offsetof(struct iwl3945_cmd, hdr);
 720         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 721
 722         pad = U32_PAD(cmd->len);
 723         count = TFD_CTL_COUNT_GET(*control_flags);
 724         *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
 725
 726         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 727                      "%d bytes at %d[%d]:%d\n",
 728                      get_cmd_string(out_cmd->hdr.cmd),
 729                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 730                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 731
 732         txq->need_update = 1;
 733
 734         /* Increment and update queue's write index */
 735         q->write_ptr = iwl3945_queue_inc_wrap(q->write_ptr, q->n_bd);
 736         ret = iwl3945_tx_queue_update_write_ptr(priv, txq);
 737
 738         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 739         return ret ? ret : idx;
 740 }
 741
 742 static int iwl3945_send_cmd_async(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 743 {
 744         int ret;
 745
 746         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 747
 748         /* An asynchronous command can not expect an SKB to be set. */
 749         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 750
 751         /* An asynchronous command MUST have a callback. */
 752         BUG_ON(!cmd->meta.u.callback);
 753
 754         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 755                 return -EBUSY;
 756
 757         ret = iwl3945_enqueue_hcmd(priv, cmd);
 758         if (ret < 0) {
 759                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 760                           get_cmd_string(cmd->id), ret);
 761                 return ret;
 762         }
 763         return 0;
 764 }
 765
 766 static int iwl3945_send_cmd_sync(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 767 {
 768         int cmd_idx;
 769         int ret;
 770         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 771
 772         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 773
 774          /* A synchronous command can not have a callback set. */
 775         BUG_ON(cmd->meta.u.callback != NULL);
 776
 777         if (atomic_xchg(&entry, 1)) {
 778                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 779                           get_cmd_string(cmd->id));
 780                 return -EBUSY;
 781         }
 782
 783         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 784
 785         if (cmd->meta.flags & CMD_WANT_SKB)
 786                 cmd->meta.source = &cmd->meta;
 787
 788         cmd_idx = iwl3945_enqueue_hcmd(priv, cmd);
 789         if (cmd_idx < 0) {
 790                 ret = cmd_idx;
 791                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 792                           get_cmd_string(cmd->id), ret);
 793                 goto out;
 794         }
 795
 796         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 797                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 798                         HOST_COMPLETE_TIMEOUT);
 799         if (!ret) {
 800                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 801                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 802                                   get_cmd_string(cmd->id),
 803                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 804
 805                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 806                         ret = -ETIMEDOUT;
 807                         goto cancel;
 808                 }
 809         }
 810
 811         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 812                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 813                                get_cmd_string(cmd->id));
 814                 ret = -ECANCELED;
 815                 goto fail;
 816         }
 817         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 818                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 819                                get_cmd_string(cmd->id));
 820                 ret = -EIO;
 821                 goto fail;
 822         }
 823         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 824                 IWL_ERROR("Error: Response NULL in '%s'\n",
 825                           get_cmd_string(cmd->id));
 826                 ret = -EIO;
 827                 goto out;
 828         }
 829
 830         ret = 0;
 831         goto out;
 832
 833 cancel:
 834         if (cmd->meta.flags & CMD_WANT_SKB) {
 835                 struct iwl3945_cmd *qcmd;
 836
 837                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 838                  * TX cmd queue. Otherwise in case the cmd comes
 839                  * in later, it will possibly set an invalid
 840                  * address (cmd->meta.source). */
 841                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 842                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 843         }
 844 fail:
 845         if (cmd->meta.u.skb) {
 846                 dev_kfree_skb_any(cmd->meta.u.skb);
 847                 cmd->meta.u.skb = NULL;
 848         }
 849 out:
 850         atomic_set(&entry, 0);
 851         return ret;
 852 }
 853
 854 int iwl3945_send_cmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 855 {
 856         if (cmd->meta.flags & CMD_ASYNC)
 857                 return iwl3945_send_cmd_async(priv, cmd);
 858
 859         return iwl3945_send_cmd_sync(priv, cmd);
 860 }
 861
 862 int iwl3945_send_cmd_pdu(struct iwl3945_priv *priv, u8 id, u16 len, const void *data)
 863 {
 864         struct iwl3945_host_cmd cmd = {
 865                 .id = id,
 866                 .len = len,
 867                 .data = data,
 868         };
 869
 870         return iwl3945_send_cmd_sync(priv, &cmd);
 871 }
 872
 873 static int __must_check iwl3945_send_cmd_u32(struct iwl3945_priv *priv, u8 id, u32 val)
 874 {
 875         struct iwl3945_host_cmd cmd = {
 876                 .id = id,
 877                 .len = sizeof(val),
 878                 .data = &val,
 879         };
 880
 881         return iwl3945_send_cmd_sync(priv, &cmd);
 882 }
 883
 884 int iwl3945_send_statistics_request(struct iwl3945_priv *priv)
 885 {
 886         return iwl3945_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 887 }
 888
 889 /**
 890  * iwl3945_set_rxon_channel - Set the phymode and channel values in staging RXON
 891  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 892  * @channel: Any channel valid for the requested phymode
 893
 894  * In addition to setting the staging RXON, priv->phymode is also set.
 895  *
 896  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 897  * in the staging RXON flag structure based on the phymode
 898  */
 899 static int iwl3945_set_rxon_channel(struct iwl3945_priv *priv, u8 phymode, u16 channel)
 900 {
 901         if (!iwl3945_get_channel_info(priv, phymode, channel)) {
 902                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 903                                channel, phymode);
 904                 return -EINVAL;
 905         }
 906
 907         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 908             (priv->phymode == phymode))
 909                 return 0;
 910
 911         priv->staging_rxon.channel = cpu_to_le16(channel);
 912         if (phymode == MODE_IEEE80211A)
 913                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 914         else
 915                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 916
 917         priv->phymode = phymode;
 918
 919         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
 920
 921         return 0;
 922 }
 923
 924 /**
 925  * iwl3945_check_rxon_cmd - validate RXON structure is valid
 926  *
 927  * NOTE:  This is really only useful during development and can eventually
 928  * be #ifdef'd out once the driver is stable and folks aren't actively
 929  * making changes
 930  */
 931 static int iwl3945_check_rxon_cmd(struct iwl3945_rxon_cmd *rxon)
 932 {
 933         int error = 0;
 934         int counter = 1;
 935
 936         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 937                 error |= le32_to_cpu(rxon->flags &
 938                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 939                                  RXON_FLG_RADAR_DETECT_MSK));
 940                 if (error)
 941                         IWL_WARNING("check 24G fields %d | %d\n",
 942                                     counter++, error);
 943         } else {
 944                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 945                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 946                 if (error)
 947                         IWL_WARNING("check 52 fields %d | %d\n",
 948                                     counter++, error);
 949                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 950                 if (error)
 951                         IWL_WARNING("check 52 CCK %d | %d\n",
 952                                     counter++, error);
 953         }
 954         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 955         if (error)
 956                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 957
 958         /* make sure basic rates 6Mbps and 1Mbps are supported */
 959         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 960                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 961         if (error)
 962                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 963
 964         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 965         if (error)
 966                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 967
 968         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 969                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 970         if (error)
 971                 IWL_WARNING("check CCK and short slot %d | %d\n",
 972                             counter++, error);
 973
 974         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 975                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 976         if (error)
 977                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 978                             counter++, error);
 979
 980         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 981                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 982         if (error)
 983                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 984                             counter++, error);
 985
 986         if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
 987                 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
 988                                 RXON_FLG_ANT_A_MSK)) == 0);
 989         if (error)
 990                 IWL_WARNING("check antenna %d %d\n", counter++, error);
 991
 992         if (error)
 993                 IWL_WARNING("Tuning to channel %d\n",
 994                             le16_to_cpu(rxon->channel));
 995
 996         if (error) {
 997                 IWL_ERROR("Not a valid iwl3945_rxon_assoc_cmd field values\n");
 998                 return -1;
 999         }
1000         return 0;
1001 }
1002
1003 /**
1004  * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
1005  * @priv: staging_rxon is compared to active_rxon
1006  *
1007  * If the RXON structure is changing enough to require a new tune,
1008  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
1009  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
1010  */
1011 static int iwl3945_full_rxon_required(struct iwl3945_priv *priv)
1012 {
1013
1014         /* These items are only settable from the full RXON command */
1015         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
1016             compare_ether_addr(priv->staging_rxon.bssid_addr,
1017                                priv->active_rxon.bssid_addr) ||
1018             compare_ether_addr(priv->staging_rxon.node_addr,
1019                                priv->active_rxon.node_addr) ||
1020             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
1021                                priv->active_rxon.wlap_bssid_addr) ||
1022             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
1023             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
1024             (priv->staging_rxon.air_propagation !=
1025              priv->active_rxon.air_propagation) ||
1026             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
1027                 return 1;
1028
1029         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1030          * be updated with the RXON_ASSOC command -- however only some
1031          * flag transitions are allowed using RXON_ASSOC */
1032
1033         /* Check if we are not switching bands */
1034         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1035             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1036                 return 1;
1037
1038         /* Check if we are switching association toggle */
1039         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1040                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1041                 return 1;
1042
1043         return 0;
1044 }
1045
1046 static int iwl3945_send_rxon_assoc(struct iwl3945_priv *priv)
1047 {
1048         int rc = 0;
1049         struct iwl3945_rx_packet *res = NULL;
1050         struct iwl3945_rxon_assoc_cmd rxon_assoc;
1051         struct iwl3945_host_cmd cmd = {
1052                 .id = REPLY_RXON_ASSOC,
1053                 .len = sizeof(rxon_assoc),
1054                 .meta.flags = CMD_WANT_SKB,
1055                 .data = &rxon_assoc,
1056         };
1057         const struct iwl3945_rxon_cmd *rxon1 = &priv->staging_rxon;
1058         const struct iwl3945_rxon_cmd *rxon2 = &priv->active_rxon;
1059
1060         if ((rxon1->flags == rxon2->flags) &&
1061             (rxon1->filter_flags == rxon2->filter_flags) &&
1062             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1063             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1064                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1065                 return 0;
1066         }
1067
1068         rxon_assoc.flags = priv->staging_rxon.flags;
1069         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1070         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1071         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1072         rxon_assoc.reserved = 0;
1073
1074         rc = iwl3945_send_cmd_sync(priv, &cmd);
1075         if (rc)
1076                 return rc;
1077
1078         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1079         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1080                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1081                 rc = -EIO;
1082         }
1083
1084         priv->alloc_rxb_skb--;
1085         dev_kfree_skb_any(cmd.meta.u.skb);
1086
1087         return rc;
1088 }
1089
1090 /**
1091  * iwl3945_commit_rxon - commit staging_rxon to hardware
1092  *
1093  * The RXON command in staging_rxon is committed to the hardware and
1094  * the active_rxon structure is updated with the new data.  This
1095  * function correctly transitions out of the RXON_ASSOC_MSK state if
1096  * a HW tune is required based on the RXON structure changes.
1097  */
1098 static int iwl3945_commit_rxon(struct iwl3945_priv *priv)
1099 {
1100         /* cast away the const for active_rxon in this function */
1101         struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1102         int rc = 0;
1103         DECLARE_MAC_BUF(mac);
1104
1105         if (!iwl3945_is_alive(priv))
1106                 return -1;
1107
1108         /* always get timestamp with Rx frame */
1109         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1110
1111         /* select antenna */
1112         priv->staging_rxon.flags &=
1113             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1114         priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1115
1116         rc = iwl3945_check_rxon_cmd(&priv->staging_rxon);
1117         if (rc) {
1118                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1119                 return -EINVAL;
1120         }
1121
1122         /* If we don't need to send a full RXON, we can use
1123          * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
1124          * and other flags for the current radio configuration. */
1125         if (!iwl3945_full_rxon_required(priv)) {
1126                 rc = iwl3945_send_rxon_assoc(priv);
1127                 if (rc) {
1128                         IWL_ERROR("Error setting RXON_ASSOC "
1129                                   "configuration (%d).\n", rc);
1130                         return rc;
1131                 }
1132
1133                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1134
1135                 return 0;
1136         }
1137
1138         /* If we are currently associated and the new config requires
1139          * an RXON_ASSOC and the new config wants the associated mask enabled,
1140          * we must clear the associated from the active configuration
1141          * before we apply the new config */
1142         if (iwl3945_is_associated(priv) &&
1143             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1144                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1145                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1146
1147                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1148                                       sizeof(struct iwl3945_rxon_cmd),
1149                                       &priv->active_rxon);
1150
1151                 /* If the mask clearing failed then we set
1152                  * active_rxon back to what it was previously */
1153                 if (rc) {
1154                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1155                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1156                                   "configuration (%d).\n", rc);
1157                         return rc;
1158                 }
1159         }
1160
1161         IWL_DEBUG_INFO("Sending RXON\n"
1162                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1163                        "* channel = %d\n"
1164                        "* bssid = %s\n",
1165                        ((priv->staging_rxon.filter_flags &
1166                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1167                        le16_to_cpu(priv->staging_rxon.channel),
1168                        print_mac(mac, priv->staging_rxon.bssid_addr));
1169
1170         /* Apply the new configuration */
1171         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1172                               sizeof(struct iwl3945_rxon_cmd), &priv->staging_rxon);
1173         if (rc) {
1174                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1175                 return rc;
1176         }
1177
1178         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1179
1180         iwl3945_clear_stations_table(priv);
1181
1182         /* If we issue a new RXON command which required a tune then we must
1183          * send a new TXPOWER command or we won't be able to Tx any frames */
1184         rc = iwl3945_hw_reg_send_txpower(priv);
1185         if (rc) {
1186                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1187                 return rc;
1188         }
1189
1190         /* Add the broadcast address so we can send broadcast frames */
1191         if (iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0) ==
1192             IWL_INVALID_STATION) {
1193                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1194                 return -EIO;
1195         }
1196
1197         /* If we have set the ASSOC_MSK and we are in BSS mode then
1198          * add the IWL_AP_ID to the station rate table */
1199         if (iwl3945_is_associated(priv) &&
1200             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
1201                 if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1202                     == IWL_INVALID_STATION) {
1203                         IWL_ERROR("Error adding AP address for transmit.\n");
1204                         return -EIO;
1205                 }
1206
1207         /* Init the hardware's rate fallback order based on the
1208          * phymode */
1209         rc = iwl3945_init_hw_rate_table(priv);
1210         if (rc) {
1211                 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1212                 return -EIO;
1213         }
1214
1215         return 0;
1216 }
1217
1218 static int iwl3945_send_bt_config(struct iwl3945_priv *priv)
1219 {
1220         struct iwl3945_bt_cmd bt_cmd = {
1221                 .flags = 3,
1222                 .lead_time = 0xAA,
1223                 .max_kill = 1,
1224                 .kill_ack_mask = 0,
1225                 .kill_cts_mask = 0,
1226         };
1227
1228         return iwl3945_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1229                                 sizeof(struct iwl3945_bt_cmd), &bt_cmd);
1230 }
1231
1232 static int iwl3945_send_scan_abort(struct iwl3945_priv *priv)
1233 {
1234         int rc = 0;
1235         struct iwl3945_rx_packet *res;
1236         struct iwl3945_host_cmd cmd = {
1237                 .id = REPLY_SCAN_ABORT_CMD,
1238                 .meta.flags = CMD_WANT_SKB,
1239         };
1240
1241         /* If there isn't a scan actively going on in the hardware
1242          * then we are in between scan bands and not actually
1243          * actively scanning, so don't send the abort command */
1244         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1245                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1246                 return 0;
1247         }
1248
1249         rc = iwl3945_send_cmd_sync(priv, &cmd);
1250         if (rc) {
1251                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1252                 return rc;
1253         }
1254
1255         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1256         if (res->u.status != CAN_ABORT_STATUS) {
1257                 /* The scan abort will return 1 for success or
1258                  * 2 for "failure".  A failure condition can be
1259                  * due to simply not being in an active scan which
1260                  * can occur if we send the scan abort before we
1261                  * the microcode has notified us that a scan is
1262                  * completed. */
1263                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1264                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1265                 clear_bit(STATUS_SCAN_HW, &priv->status);
1266         }
1267
1268         dev_kfree_skb_any(cmd.meta.u.skb);
1269
1270         return rc;
1271 }
1272
1273 static int iwl3945_card_state_sync_callback(struct iwl3945_priv *priv,
1274                                         struct iwl3945_cmd *cmd,
1275                                         struct sk_buff *skb)
1276 {
1277         return 1;
1278 }
1279
1280 /*
1281  * CARD_STATE_CMD
1282  *
1283  * Use: Sets the device's internal card state to enable, disable, or halt
1284  *
1285  * When in the 'enable' state the card operates as normal.
1286  * When in the 'disable' state, the card enters into a low power mode.
1287  * When in the 'halt' state, the card is shut down and must be fully
1288  * restarted to come back on.
1289  */
1290 static int iwl3945_send_card_state(struct iwl3945_priv *priv, u32 flags, u8 meta_flag)
1291 {
1292         struct iwl3945_host_cmd cmd = {
1293                 .id = REPLY_CARD_STATE_CMD,
1294                 .len = sizeof(u32),
1295                 .data = &flags,
1296                 .meta.flags = meta_flag,
1297         };
1298
1299         if (meta_flag & CMD_ASYNC)
1300                 cmd.meta.u.callback = iwl3945_card_state_sync_callback;
1301
1302         return iwl3945_send_cmd(priv, &cmd);
1303 }
1304
1305 static int iwl3945_add_sta_sync_callback(struct iwl3945_priv *priv,
1306                                      struct iwl3945_cmd *cmd, struct sk_buff *skb)
1307 {
1308         struct iwl3945_rx_packet *res = NULL;
1309
1310         if (!skb) {
1311                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1312                 return 1;
1313         }
1314
1315         res = (struct iwl3945_rx_packet *)skb->data;
1316         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1317                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1318                           res->hdr.flags);
1319                 return 1;
1320         }
1321
1322         switch (res->u.add_sta.status) {
1323         case ADD_STA_SUCCESS_MSK:
1324                 break;
1325         default:
1326                 break;
1327         }
1328
1329         /* We didn't cache the SKB; let the caller free it */
1330         return 1;
1331 }
1332
1333 int iwl3945_send_add_station(struct iwl3945_priv *priv,
1334                          struct iwl3945_addsta_cmd *sta, u8 flags)
1335 {
1336         struct iwl3945_rx_packet *res = NULL;
1337         int rc = 0;
1338         struct iwl3945_host_cmd cmd = {
1339                 .id = REPLY_ADD_STA,
1340                 .len = sizeof(struct iwl3945_addsta_cmd),
1341                 .meta.flags = flags,
1342                 .data = sta,
1343         };
1344
1345         if (flags & CMD_ASYNC)
1346                 cmd.meta.u.callback = iwl3945_add_sta_sync_callback;
1347         else
1348                 cmd.meta.flags |= CMD_WANT_SKB;
1349
1350         rc = iwl3945_send_cmd(priv, &cmd);
1351
1352         if (rc || (flags & CMD_ASYNC))
1353                 return rc;
1354
1355         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1356         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1357                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1358                           res->hdr.flags);
1359                 rc = -EIO;
1360         }
1361
1362         if (rc == 0) {
1363                 switch (res->u.add_sta.status) {
1364                 case ADD_STA_SUCCESS_MSK:
1365                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1366                         break;
1367                 default:
1368                         rc = -EIO;
1369                         IWL_WARNING("REPLY_ADD_STA failed\n");
1370                         break;
1371                 }
1372         }
1373
1374         priv->alloc_rxb_skb--;
1375         dev_kfree_skb_any(cmd.meta.u.skb);
1376
1377         return rc;
1378 }
1379
1380 static int iwl3945_update_sta_key_info(struct iwl3945_priv *priv,
1381                                    struct ieee80211_key_conf *keyconf,
1382                                    u8 sta_id)
1383 {
1384         unsigned long flags;
1385         __le16 key_flags = 0;
1386
1387         switch (keyconf->alg) {
1388         case ALG_CCMP:
1389                 key_flags |= STA_KEY_FLG_CCMP;
1390                 key_flags |= cpu_to_le16(
1391                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1392                 key_flags &= ~STA_KEY_FLG_INVALID;
1393                 break;
1394         case ALG_TKIP:
1395         case ALG_WEP:
1396         default:
1397                 return -EINVAL;
1398         }
1399         spin_lock_irqsave(&priv->sta_lock, flags);
1400         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1401         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1402         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1403                keyconf->keylen);
1404
1405         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1406                keyconf->keylen);
1407         priv->stations[sta_id].sta.key.key_flags = key_flags;
1408         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1409         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1410
1411         spin_unlock_irqrestore(&priv->sta_lock, flags);
1412
1413         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1414         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1415         return 0;
1416 }
1417
1418 static int iwl3945_clear_sta_key_info(struct iwl3945_priv *priv, u8 sta_id)
1419 {
1420         unsigned long flags;
1421
1422         spin_lock_irqsave(&priv->sta_lock, flags);
1423         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
1424         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl3945_keyinfo));
1425         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1426         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1427         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1428         spin_unlock_irqrestore(&priv->sta_lock, flags);
1429
1430         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1431         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1432         return 0;
1433 }
1434
1435 static void iwl3945_clear_free_frames(struct iwl3945_priv *priv)
1436 {
1437         struct list_head *element;
1438
1439         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1440                        priv->frames_count);
1441
1442         while (!list_empty(&priv->free_frames)) {
1443                 element = priv->free_frames.next;
1444                 list_del(element);
1445                 kfree(list_entry(element, struct iwl3945_frame, list));
1446                 priv->frames_count--;
1447         }
1448
1449         if (priv->frames_count) {
1450                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1451                             priv->frames_count);
1452                 priv->frames_count = 0;
1453         }
1454 }
1455
1456 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl3945_priv *priv)
1457 {
1458         struct iwl3945_frame *frame;
1459         struct list_head *element;
1460         if (list_empty(&priv->free_frames)) {
1461                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1462                 if (!frame) {
1463                         IWL_ERROR("Could not allocate frame!\n");
1464                         return NULL;
1465                 }
1466
1467                 priv->frames_count++;
1468                 return frame;
1469         }
1470
1471         element = priv->free_frames.next;
1472         list_del(element);
1473         return list_entry(element, struct iwl3945_frame, list);
1474 }
1475
1476 static void iwl3945_free_frame(struct iwl3945_priv *priv, struct iwl3945_frame *frame)
1477 {
1478         memset(frame, 0, sizeof(*frame));
1479         list_add(&frame->list, &priv->free_frames);
1480 }
1481
1482 unsigned int iwl3945_fill_beacon_frame(struct iwl3945_priv *priv,
1483                                 struct ieee80211_hdr *hdr,
1484                                 const u8 *dest, int left)
1485 {
1486
1487         if (!iwl3945_is_associated(priv) || !priv->ibss_beacon ||
1488             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1489              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1490                 return 0;
1491
1492         if (priv->ibss_beacon->len > left)
1493                 return 0;
1494
1495         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1496
1497         return priv->ibss_beacon->len;
1498 }
1499
1500 static u8 iwl3945_rate_get_lowest_plcp(int rate_mask)
1501 {
1502         u8 i;
1503
1504         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1505              i = iwl3945_rates[i].next_ieee) {
1506                 if (rate_mask & (1 << i))
1507                         return iwl3945_rates[i].plcp;
1508         }
1509
1510         return IWL_RATE_INVALID;
1511 }
1512
1513 static int iwl3945_send_beacon_cmd(struct iwl3945_priv *priv)
1514 {
1515         struct iwl3945_frame *frame;
1516         unsigned int frame_size;
1517         int rc;
1518         u8 rate;
1519
1520         frame = iwl3945_get_free_frame(priv);
1521
1522         if (!frame) {
1523                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1524                           "command.\n");
1525                 return -ENOMEM;
1526         }
1527
1528         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1529                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic &
1530                                                 0xFF0);
1531                 if (rate == IWL_INVALID_RATE)
1532                         rate = IWL_RATE_6M_PLCP;
1533         } else {
1534                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1535                 if (rate == IWL_INVALID_RATE)
1536                         rate = IWL_RATE_1M_PLCP;
1537         }
1538
1539         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
1540
1541         rc = iwl3945_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1542                               &frame->u.cmd[0]);
1543
1544         iwl3945_free_frame(priv, frame);
1545
1546         return rc;
1547 }
1548
1549 /******************************************************************************
1550  *
1551  * EEPROM related functions
1552  *
1553  ******************************************************************************/
1554
1555 static void get_eeprom_mac(struct iwl3945_priv *priv, u8 *mac)
1556 {
1557         memcpy(mac, priv->eeprom.mac_address, 6);
1558 }
1559
1560 /**
1561  * iwl3945_eeprom_init - read EEPROM contents
1562  *
1563  * Load the EEPROM contents from adapter into priv->eeprom
1564  *
1565  * NOTE:  This routine uses the non-debug IO access functions.
1566  */
1567 int iwl3945_eeprom_init(struct iwl3945_priv *priv)
1568 {
1569         __le16 *e = (__le16 *)&priv->eeprom;
1570         u32 gp = iwl3945_read32(priv, CSR_EEPROM_GP);
1571         u32 r;
1572         int sz = sizeof(priv->eeprom);
1573         int rc;
1574         int i;
1575         u16 addr;
1576
1577         /* The EEPROM structure has several padding buffers within it
1578          * and when adding new EEPROM maps is subject to programmer errors
1579          * which may be very difficult to identify without explicitly
1580          * checking the resulting size of the eeprom map. */
1581         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1582
1583         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1584                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1585                 return -ENOENT;
1586         }
1587
1588         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1589         rc = iwl3945_eeprom_acquire_semaphore(priv);
1590         if (rc < 0) {
1591                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1592                 return -ENOENT;
1593         }
1594
1595         /* eeprom is an array of 16bit values */
1596         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1597                 _iwl3945_write32(priv, CSR_EEPROM_REG, addr << 1);
1598                 _iwl3945_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1599
1600                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1601                                         i += IWL_EEPROM_ACCESS_DELAY) {
1602                         r = _iwl3945_read_direct32(priv, CSR_EEPROM_REG);
1603                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1604                                 break;
1605                         udelay(IWL_EEPROM_ACCESS_DELAY);
1606                 }
1607
1608                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1609                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1610                         return -ETIMEDOUT;
1611                 }
1612                 e[addr / 2] = cpu_to_le16(r >> 16);
1613         }
1614
1615         return 0;
1616 }
1617
1618 /******************************************************************************
1619  *
1620  * Misc. internal state and helper functions
1621  *
1622  ******************************************************************************/
1623 #ifdef CONFIG_IWL3945_DEBUG
1624
1625 /**
1626  * iwl3945_report_frame - dump frame to syslog during debug sessions
1627  *
1628  * You may hack this function to show different aspects of received frames,
1629  * including selective frame dumps.
1630  * group100 parameter selects whether to show 1 out of 100 good frames.
1631  */
1632 void iwl3945_report_frame(struct iwl3945_priv *priv,
1633                       struct iwl3945_rx_packet *pkt,
1634                       struct ieee80211_hdr *header, int group100)
1635 {
1636         u32 to_us;
1637         u32 print_summary = 0;
1638         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
1639         u32 hundred = 0;
1640         u32 dataframe = 0;
1641         u16 fc;
1642         u16 seq_ctl;
1643         u16 channel;
1644         u16 phy_flags;
1645         int rate_sym;
1646         u16 length;
1647         u16 status;
1648         u16 bcn_tmr;
1649         u32 tsf_low;
1650         u64 tsf;
1651         u8 rssi;
1652         u8 agc;
1653         u16 sig_avg;
1654         u16 noise_diff;
1655         struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1656         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1657         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
1658         u8 *data = IWL_RX_DATA(pkt);
1659
1660         /* MAC header */
1661         fc = le16_to_cpu(header->frame_control);
1662         seq_ctl = le16_to_cpu(header->seq_ctrl);
1663
1664         /* metadata */
1665         channel = le16_to_cpu(rx_hdr->channel);
1666         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1667         rate_sym = rx_hdr->rate;
1668         length = le16_to_cpu(rx_hdr->len);
1669
1670         /* end-of-frame status and timestamp */
1671         status = le32_to_cpu(rx_end->status);
1672         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1673         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1674         tsf = le64_to_cpu(rx_end->timestamp);
1675
1676         /* signal statistics */
1677         rssi = rx_stats->rssi;
1678         agc = rx_stats->agc;
1679         sig_avg = le16_to_cpu(rx_stats->sig_avg);
1680         noise_diff = le16_to_cpu(rx_stats->noise_diff);
1681
1682         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1683
1684         /* if data frame is to us and all is good,
1685          *   (optionally) print summary for only 1 out of every 100 */
1686         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1687             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1688                 dataframe = 1;
1689                 if (!group100)
1690                         print_summary = 1;      /* print each frame */
1691                 else if (priv->framecnt_to_us < 100) {
1692                         priv->framecnt_to_us++;
1693                         print_summary = 0;
1694                 } else {
1695                         priv->framecnt_to_us = 0;
1696                         print_summary = 1;
1697                         hundred = 1;
1698                 }
1699         } else {
1700                 /* print summary for all other frames */
1701                 print_summary = 1;
1702         }
1703
1704         if (print_summary) {
1705                 char *title;
1706                 u32 rate;
1707
1708                 if (hundred)
1709                         title = "100Frames";
1710                 else if (fc & IEEE80211_FCTL_RETRY)
1711                         title = "Retry";
1712                 else if (ieee80211_is_assoc_response(fc))
1713                         title = "AscRsp";
1714                 else if (ieee80211_is_reassoc_response(fc))
1715                         title = "RasRsp";
1716                 else if (ieee80211_is_probe_response(fc)) {
1717                         title = "PrbRsp";
1718                         print_dump = 1; /* dump frame contents */
1719                 } else if (ieee80211_is_beacon(fc)) {
1720                         title = "Beacon";
1721                         print_dump = 1; /* dump frame contents */
1722                 } else if (ieee80211_is_atim(fc))
1723                         title = "ATIM";
1724                 else if (ieee80211_is_auth(fc))
1725                         title = "Auth";
1726                 else if (ieee80211_is_deauth(fc))
1727                         title = "DeAuth";
1728                 else if (ieee80211_is_disassoc(fc))
1729                         title = "DisAssoc";
1730                 else
1731                         title = "Frame";
1732
1733                 rate = iwl3945_rate_index_from_plcp(rate_sym);
1734                 if (rate == -1)
1735                         rate = 0;
1736                 else
1737                         rate = iwl3945_rates[rate].ieee / 2;
1738
1739                 /* print frame summary.
1740                  * MAC addresses show just the last byte (for brevity),
1741                  *    but you can hack it to show more, if you'd like to. */
1742                 if (dataframe)
1743                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1744                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1745                                      title, fc, header->addr1[5],
1746                                      length, rssi, channel, rate);
1747                 else {
1748                         /* src/dst addresses assume managed mode */
1749                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1750                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
1751                                      "phy=0x%02x, chnl=%d\n",
1752                                      title, fc, header->addr1[5],
1753                                      header->addr3[5], rssi,
1754                                      tsf_low - priv->scan_start_tsf,
1755                                      phy_flags, channel);
1756                 }
1757         }
1758         if (print_dump)
1759                 iwl3945_print_hex_dump(IWL_DL_RX, data, length);
1760 }
1761 #endif
1762
1763 static void iwl3945_unset_hw_setting(struct iwl3945_priv *priv)
1764 {
1765         if (priv->hw_setting.shared_virt)
1766                 pci_free_consistent(priv->pci_dev,
1767                                     sizeof(struct iwl3945_shared),
1768                                     priv->hw_setting.shared_virt,
1769                                     priv->hw_setting.shared_phys);
1770 }
1771
1772 /**
1773  * iwl3945_supported_rate_to_ie - fill in the supported rate in IE field
1774  *
1775  * return : set the bit for each supported rate insert in ie
1776  */
1777 static u16 iwl3945_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1778                                     u16 basic_rate, int *left)
1779 {
1780         u16 ret_rates = 0, bit;
1781         int i;
1782         u8 *cnt = ie;
1783         u8 *rates = ie + 1;
1784
1785         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1786                 if (bit & supported_rate) {
1787                         ret_rates |= bit;
1788                         rates[*cnt] = iwl3945_rates[i].ieee |
1789                                 ((bit & basic_rate) ? 0x80 : 0x00);
1790                         (*cnt)++;
1791                         (*left)--;
1792                         if ((*left <= 0) ||
1793                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1794                                 break;
1795                 }
1796         }
1797
1798         return ret_rates;
1799 }
1800
1801 /**
1802  * iwl3945_fill_probe_req - fill in all required fields and IE for probe request
1803  */
1804 static u16 iwl3945_fill_probe_req(struct iwl3945_priv *priv,
1805                               struct ieee80211_mgmt *frame,
1806                               int left, int is_direct)
1807 {
1808         int len = 0;
1809         u8 *pos = NULL;
1810         u16 active_rates, ret_rates, cck_rates;
1811
1812         /* Make sure there is enough space for the probe request,
1813          * two mandatory IEs and the data */
1814         left -= 24;
1815         if (left < 0)
1816                 return 0;
1817         len += 24;
1818
1819         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1820         memcpy(frame->da, iwl3945_broadcast_addr, ETH_ALEN);
1821         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1822         memcpy(frame->bssid, iwl3945_broadcast_addr, ETH_ALEN);
1823         frame->seq_ctrl = 0;
1824
1825         /* fill in our indirect SSID IE */
1826         /* ...next IE... */
1827
1828         left -= 2;
1829         if (left < 0)
1830                 return 0;
1831         len += 2;
1832         pos = &(frame->u.probe_req.variable[0]);
1833         *pos++ = WLAN_EID_SSID;
1834         *pos++ = 0;
1835
1836         /* fill in our direct SSID IE... */
1837         if (is_direct) {
1838                 /* ...next IE... */
1839                 left -= 2 + priv->essid_len;
1840                 if (left < 0)
1841                         return 0;
1842                 /* ... fill it in... */
1843                 *pos++ = WLAN_EID_SSID;
1844                 *pos++ = priv->essid_len;
1845                 memcpy(pos, priv->essid, priv->essid_len);
1846                 pos += priv->essid_len;
1847                 len += 2 + priv->essid_len;
1848         }
1849
1850         /* fill in supported rate */
1851         /* ...next IE... */
1852         left -= 2;
1853         if (left < 0)
1854                 return 0;
1855
1856         /* ... fill it in... */
1857         *pos++ = WLAN_EID_SUPP_RATES;
1858         *pos = 0;
1859
1860         priv->active_rate = priv->rates_mask;
1861         active_rates = priv->active_rate;
1862         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1863
1864         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1865         ret_rates = iwl3945_supported_rate_to_ie(pos, cck_rates,
1866                         priv->active_rate_basic, &left);
1867         active_rates &= ~ret_rates;
1868
1869         ret_rates = iwl3945_supported_rate_to_ie(pos, active_rates,
1870                                  priv->active_rate_basic, &left);
1871         active_rates &= ~ret_rates;
1872
1873         len += 2 + *pos;
1874         pos += (*pos) + 1;
1875         if (active_rates == 0)
1876                 goto fill_end;
1877
1878         /* fill in supported extended rate */
1879         /* ...next IE... */
1880         left -= 2;
1881         if (left < 0)
1882                 return 0;
1883         /* ... fill it in... */
1884         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1885         *pos = 0;
1886         iwl3945_supported_rate_to_ie(pos, active_rates,
1887                                  priv->active_rate_basic, &left);
1888         if (*pos > 0)
1889                 len += 2 + *pos;
1890
1891  fill_end:
1892         return (u16)len;
1893 }
1894
1895 /*
1896  * QoS  support
1897 */
1898 #ifdef CONFIG_IWL3945_QOS
1899 static int iwl3945_send_qos_params_command(struct iwl3945_priv *priv,
1900                                        struct iwl3945_qosparam_cmd *qos)
1901 {
1902
1903         return iwl3945_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1904                                 sizeof(struct iwl3945_qosparam_cmd), qos);
1905 }
1906
1907 static void iwl3945_reset_qos(struct iwl3945_priv *priv)
1908 {
1909         u16 cw_min = 15;
1910         u16 cw_max = 1023;
1911         u8 aifs = 2;
1912         u8 is_legacy = 0;
1913         unsigned long flags;
1914         int i;
1915
1916         spin_lock_irqsave(&priv->lock, flags);
1917         priv->qos_data.qos_active = 0;
1918
1919         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1920                 if (priv->qos_data.qos_enable)
1921                         priv->qos_data.qos_active = 1;
1922                 if (!(priv->active_rate & 0xfff0)) {
1923                         cw_min = 31;
1924                         is_legacy = 1;
1925                 }
1926         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1927                 if (priv->qos_data.qos_enable)
1928                         priv->qos_data.qos_active = 1;
1929         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1930                 cw_min = 31;
1931                 is_legacy = 1;
1932         }
1933
1934         if (priv->qos_data.qos_active)
1935                 aifs = 3;
1936
1937         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1938         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1939         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1940         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1941         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1942
1943         if (priv->qos_data.qos_active) {
1944                 i = 1;
1945                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1946                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1947                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1948                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1949                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1950
1951                 i = 2;
1952                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1953                         cpu_to_le16((cw_min + 1) / 2 - 1);
1954                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1955                         cpu_to_le16(cw_max);
1956                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1957                 if (is_legacy)
1958                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1959                                 cpu_to_le16(6016);
1960                 else
1961                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1962                                 cpu_to_le16(3008);
1963                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1964
1965                 i = 3;
1966                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1967                         cpu_to_le16((cw_min + 1) / 4 - 1);
1968                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1969                         cpu_to_le16((cw_max + 1) / 2 - 1);
1970                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1971                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1972                 if (is_legacy)
1973                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1974                                 cpu_to_le16(3264);
1975                 else
1976                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1977                                 cpu_to_le16(1504);
1978         } else {
1979                 for (i = 1; i < 4; i++) {
1980                         priv->qos_data.def_qos_parm.ac[i].cw_min =
1981                                 cpu_to_le16(cw_min);
1982                         priv->qos_data.def_qos_parm.ac[i].cw_max =
1983                                 cpu_to_le16(cw_max);
1984                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1985                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1986                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1987                 }
1988         }
1989         IWL_DEBUG_QOS("set QoS to default \n");
1990
1991         spin_unlock_irqrestore(&priv->lock, flags);
1992 }
1993
1994 static void iwl3945_activate_qos(struct iwl3945_priv *priv, u8 force)
1995 {
1996         unsigned long flags;
1997
1998         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1999                 return;
2000
2001         if (!priv->qos_data.qos_enable)
2002                 return;
2003
2004         spin_lock_irqsave(&priv->lock, flags);
2005         priv->qos_data.def_qos_parm.qos_flags = 0;
2006
2007         if (priv->qos_data.qos_cap.q_AP.queue_request &&
2008             !priv->qos_data.qos_cap.q_AP.txop_request)
2009                 priv->qos_data.def_qos_parm.qos_flags |=
2010                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
2011
2012         if (priv->qos_data.qos_active)
2013                 priv->qos_data.def_qos_parm.qos_flags |=
2014                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2015
2016         spin_unlock_irqrestore(&priv->lock, flags);
2017
2018         if (force || iwl3945_is_associated(priv)) {
2019                 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
2020                               priv->qos_data.qos_active);
2021
2022                 iwl3945_send_qos_params_command(priv,
2023                                 &(priv->qos_data.def_qos_parm));
2024         }
2025 }
2026
2027 #endif /* CONFIG_IWL3945_QOS */
2028 /*
2029  * Power management (not Tx power!) functions
2030  */
2031 #define MSEC_TO_USEC 1024
2032
2033 #define NOSLP __constant_cpu_to_le32(0)
2034 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
2035 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2036 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2037                                      __constant_cpu_to_le32(X1), \
2038                                      __constant_cpu_to_le32(X2), \
2039                                      __constant_cpu_to_le32(X3), \
2040                                      __constant_cpu_to_le32(X4)}
2041
2042
2043 /* default power management (not Tx power) table values */
2044 /* for tim  0-10 */
2045 static struct iwl3945_power_vec_entry range_0[IWL_POWER_AC] = {
2046         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2047         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2048         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2049         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2050         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2051         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2052 };
2053
2054 /* for tim > 10 */
2055 static struct iwl3945_power_vec_entry range_1[IWL_POWER_AC] = {
2056         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2057         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2058                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2059         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2060                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2061         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2062                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2063         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2064         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2065                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2066 };
2067
2068 int iwl3945_power_init_handle(struct iwl3945_priv *priv)
2069 {
2070         int rc = 0, i;
2071         struct iwl3945_power_mgr *pow_data;
2072         int size = sizeof(struct iwl3945_power_vec_entry) * IWL_POWER_AC;
2073         u16 pci_pm;
2074
2075         IWL_DEBUG_POWER("Initialize power \n");
2076
2077         pow_data = &(priv->power_data);
2078
2079         memset(pow_data, 0, sizeof(*pow_data));
2080
2081         pow_data->active_index = IWL_POWER_RANGE_0;
2082         pow_data->dtim_val = 0xffff;
2083
2084         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2085         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2086
2087         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2088         if (rc != 0)
2089                 return 0;
2090         else {
2091                 struct iwl3945_powertable_cmd *cmd;
2092
2093                 IWL_DEBUG_POWER("adjust power command flags\n");
2094
2095                 for (i = 0; i < IWL_POWER_AC; i++) {
2096                         cmd = &pow_data->pwr_range_0[i].cmd;
2097
2098                         if (pci_pm & 0x1)
2099                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2100                         else
2101                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2102                 }
2103         }
2104         return rc;
2105 }
2106
2107 static int iwl3945_update_power_cmd(struct iwl3945_priv *priv,
2108                                 struct iwl3945_powertable_cmd *cmd, u32 mode)
2109 {
2110         int rc = 0, i;
2111         u8 skip;
2112         u32 max_sleep = 0;
2113         struct iwl3945_power_vec_entry *range;
2114         u8 period = 0;
2115         struct iwl3945_power_mgr *pow_data;
2116
2117         if (mode > IWL_POWER_INDEX_5) {
2118                 IWL_DEBUG_POWER("Error invalid power mode \n");
2119                 return -1;
2120         }
2121         pow_data = &(priv->power_data);
2122
2123         if (pow_data->active_index == IWL_POWER_RANGE_0)
2124                 range = &pow_data->pwr_range_0[0];
2125         else
2126                 range = &pow_data->pwr_range_1[1];
2127
2128         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl3945_powertable_cmd));
2129
2130 #ifdef IWL_MAC80211_DISABLE
2131         if (priv->assoc_network != NULL) {
2132                 unsigned long flags;
2133
2134                 period = priv->assoc_network->tim.tim_period;
2135         }
2136 #endif  /*IWL_MAC80211_DISABLE */
2137         skip = range[mode].no_dtim;
2138
2139         if (period == 0) {
2140                 period = 1;
2141                 skip = 0;
2142         }
2143
2144         if (skip == 0) {
2145                 max_sleep = period;
2146                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2147         } else {
2148                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2149                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2150                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2151         }
2152
2153         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2154                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2155                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2156         }
2157
2158         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2159         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2160         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2161         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2162                         le32_to_cpu(cmd->sleep_interval[0]),
2163                         le32_to_cpu(cmd->sleep_interval[1]),
2164                         le32_to_cpu(cmd->sleep_interval[2]),
2165                         le32_to_cpu(cmd->sleep_interval[3]),
2166                         le32_to_cpu(cmd->sleep_interval[4]));
2167
2168         return rc;
2169 }
2170
2171 static int iwl3945_send_power_mode(struct iwl3945_priv *priv, u32 mode)
2172 {
2173         u32 uninitialized_var(final_mode);
2174         int rc;
2175         struct iwl3945_powertable_cmd cmd;
2176
2177         /* If on battery, set to 3,
2178          * if plugged into AC power, set to CAM ("continuously aware mode"),
2179          * else user level */
2180         switch (mode) {
2181         case IWL_POWER_BATTERY:
2182                 final_mode = IWL_POWER_INDEX_3;
2183                 break;
2184         case IWL_POWER_AC:
2185                 final_mode = IWL_POWER_MODE_CAM;
2186                 break;
2187         default:
2188                 final_mode = mode;
2189                 break;
2190         }
2191
2192         iwl3945_update_power_cmd(priv, &cmd, final_mode);
2193
2194         rc = iwl3945_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2195
2196         if (final_mode == IWL_POWER_MODE_CAM)
2197                 clear_bit(STATUS_POWER_PMI, &priv->status);
2198         else
2199                 set_bit(STATUS_POWER_PMI, &priv->status);
2200
2201         return rc;
2202 }
2203
2204 int iwl3945_is_network_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
2205 {
2206         /* Filter incoming packets to determine if they are targeted toward
2207          * this network, discarding packets coming from ourselves */
2208         switch (priv->iw_mode) {
2209         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2210                 /* packets from our adapter are dropped (echo) */
2211                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2212                         return 0;
2213                 /* {broad,multi}cast packets to our IBSS go through */
2214                 if (is_multicast_ether_addr(header->addr1))
2215                         return !compare_ether_addr(header->addr3, priv->bssid);
2216                 /* packets to our adapter go through */
2217                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2218         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2219                 /* packets from our adapter are dropped (echo) */
2220                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2221                         return 0;
2222                 /* {broad,multi}cast packets to our BSS go through */
2223                 if (is_multicast_ether_addr(header->addr1))
2224                         return !compare_ether_addr(header->addr2, priv->bssid);
2225                 /* packets to our adapter go through */
2226                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2227         }
2228
2229         return 1;
2230 }
2231
2232 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2233
2234 static const char *iwl3945_get_tx_fail_reason(u32 status)
2235 {
2236         switch (status & TX_STATUS_MSK) {
2237         case TX_STATUS_SUCCESS:
2238                 return "SUCCESS";
2239                 TX_STATUS_ENTRY(SHORT_LIMIT);
2240                 TX_STATUS_ENTRY(LONG_LIMIT);
2241                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2242                 TX_STATUS_ENTRY(MGMNT_ABORT);
2243                 TX_STATUS_ENTRY(NEXT_FRAG);
2244                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2245                 TX_STATUS_ENTRY(DEST_PS);
2246                 TX_STATUS_ENTRY(ABORTED);
2247                 TX_STATUS_ENTRY(BT_RETRY);
2248                 TX_STATUS_ENTRY(STA_INVALID);
2249                 TX_STATUS_ENTRY(FRAG_DROPPED);
2250                 TX_STATUS_ENTRY(TID_DISABLE);
2251                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2252                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2253                 TX_STATUS_ENTRY(TX_LOCKED);
2254                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2255         }
2256
2257         return "UNKNOWN";
2258 }
2259
2260 /**
2261  * iwl3945_scan_cancel - Cancel any currently executing HW scan
2262  *
2263  * NOTE: priv->mutex is not required before calling this function
2264  */
2265 static int iwl3945_scan_cancel(struct iwl3945_priv *priv)
2266 {
2267         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2268                 clear_bit(STATUS_SCANNING, &priv->status);
2269                 return 0;
2270         }
2271
2272         if (test_bit(STATUS_SCANNING, &priv->status)) {
2273                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2274                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2275                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2276                         queue_work(priv->workqueue, &priv->abort_scan);
2277
2278                 } else
2279                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2280
2281                 return test_bit(STATUS_SCANNING, &priv->status);
2282         }
2283
2284         return 0;
2285 }
2286
2287 /**
2288  * iwl3945_scan_cancel_timeout - Cancel any currently executing HW scan
2289  * @ms: amount of time to wait (in milliseconds) for scan to abort
2290  *
2291  * NOTE: priv->mutex must be held before calling this function
2292  */
2293 static int iwl3945_scan_cancel_timeout(struct iwl3945_priv *priv, unsigned long ms)
2294 {
2295         unsigned long now = jiffies;
2296         int ret;
2297
2298         ret = iwl3945_scan_cancel(priv);
2299         if (ret && ms) {
2300                 mutex_unlock(&priv->mutex);
2301                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2302                                 test_bit(STATUS_SCANNING, &priv->status))
2303                         msleep(1);
2304                 mutex_lock(&priv->mutex);
2305
2306                 return test_bit(STATUS_SCANNING, &priv->status);
2307         }
2308
2309         return ret;
2310 }
2311
2312 static void iwl3945_sequence_reset(struct iwl3945_priv *priv)
2313 {
2314         /* Reset ieee stats */
2315
2316         /* We don't reset the net_device_stats (ieee->stats) on
2317          * re-association */
2318
2319         priv->last_seq_num = -1;
2320         priv->last_frag_num = -1;
2321         priv->last_packet_time = 0;
2322
2323         iwl3945_scan_cancel(priv);
2324 }
2325
2326 #define MAX_UCODE_BEACON_INTERVAL       1024
2327 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2328
2329 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
2330 {
2331         u16 new_val = 0;
2332         u16 beacon_factor = 0;
2333
2334         beacon_factor =
2335             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2336                 / MAX_UCODE_BEACON_INTERVAL;
2337         new_val = beacon_val / beacon_factor;
2338
2339         return cpu_to_le16(new_val);
2340 }
2341
2342 static void iwl3945_setup_rxon_timing(struct iwl3945_priv *priv)
2343 {
2344         u64 interval_tm_unit;
2345         u64 tsf, result;
2346         unsigned long flags;
2347         struct ieee80211_conf *conf = NULL;
2348         u16 beacon_int = 0;
2349
2350         conf = ieee80211_get_hw_conf(priv->hw);
2351
2352         spin_lock_irqsave(&priv->lock, flags);
2353         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2354         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2355
2356         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2357
2358         tsf = priv->timestamp1;
2359         tsf = ((tsf << 32) | priv->timestamp0);
2360
2361         beacon_int = priv->beacon_int;
2362         spin_unlock_irqrestore(&priv->lock, flags);
2363
2364         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2365                 if (beacon_int == 0) {
2366                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2367                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2368                 } else {
2369                         priv->rxon_timing.beacon_interval =
2370                                 cpu_to_le16(beacon_int);
2371                         priv->rxon_timing.beacon_interval =
2372                             iwl3945_adjust_beacon_interval(
2373                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2374                 }
2375
2376                 priv->rxon_timing.atim_window = 0;
2377         } else {
2378                 priv->rxon_timing.beacon_interval =
2379                         iwl3945_adjust_beacon_interval(conf->beacon_int);
2380                 /* TODO: we need to get atim_window from upper stack
2381                  * for now we set to 0 */
2382                 priv->rxon_timing.atim_window = 0;
2383         }
2384
2385         interval_tm_unit =
2386                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2387         result = do_div(tsf, interval_tm_unit);
2388         priv->rxon_timing.beacon_init_val =
2389             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2390
2391         IWL_DEBUG_ASSOC
2392             ("beacon interval %d beacon timer %d beacon tim %d\n",
2393                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2394                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2395                 le16_to_cpu(priv->rxon_timing.atim_window));
2396 }
2397
2398 static int iwl3945_scan_initiate(struct iwl3945_priv *priv)
2399 {
2400         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2401                 IWL_ERROR("APs don't scan.\n");
2402                 return 0;
2403         }
2404
2405         if (!iwl3945_is_ready_rf(priv)) {
2406                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2407                 return -EIO;
2408         }
2409
2410         if (test_bit(STATUS_SCANNING, &priv->status)) {
2411                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2412                 return -EAGAIN;
2413         }
2414
2415         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2416                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2417                                "Queuing.\n");
2418                 return -EAGAIN;
2419         }
2420
2421         IWL_DEBUG_INFO("Starting scan...\n");
2422         priv->scan_bands = 2;
2423         set_bit(STATUS_SCANNING, &priv->status);
2424         priv->scan_start = jiffies;
2425         priv->scan_pass_start = priv->scan_start;
2426
2427         queue_work(priv->workqueue, &priv->request_scan);
2428
2429         return 0;
2430 }
2431
2432 static int iwl3945_set_rxon_hwcrypto(struct iwl3945_priv *priv, int hw_decrypt)
2433 {
2434         struct iwl3945_rxon_cmd *rxon = &priv->staging_rxon;
2435
2436         if (hw_decrypt)
2437                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2438         else
2439                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2440
2441         return 0;
2442 }
2443
2444 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv, u8 phymode)
2445 {
2446         if (phymode == MODE_IEEE80211A) {
2447                 priv->staging_rxon.flags &=
2448                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2449                       | RXON_FLG_CCK_MSK);
2450                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2451         } else {
2452                 /* Copied from iwl3945_bg_post_associate() */
2453                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2454                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2455                 else
2456                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2457
2458                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2459                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2460
2461                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2462                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2463                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2464         }
2465 }
2466
2467 /*
2468  * initialize rxon structure with default values from eeprom
2469  */
2470 static void iwl3945_connection_init_rx_config(struct iwl3945_priv *priv)
2471 {
2472         const struct iwl3945_channel_info *ch_info;
2473
2474         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2475
2476         switch (priv->iw_mode) {
2477         case IEEE80211_IF_TYPE_AP:
2478                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2479                 break;
2480
2481         case IEEE80211_IF_TYPE_STA:
2482                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2483                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2484                 break;
2485
2486         case IEEE80211_IF_TYPE_IBSS:
2487                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2488                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2489                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2490                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2491                 break;
2492
2493         case IEEE80211_IF_TYPE_MNTR:
2494                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2495                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2496                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2497                 break;
2498         }
2499
2500 #if 0
2501         /* TODO:  Figure out when short_preamble would be set and cache from
2502          * that */
2503         if (!hw_to_local(priv->hw)->short_preamble)
2504                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2505         else
2506                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2507 #endif
2508
2509         ch_info = iwl3945_get_channel_info(priv, priv->phymode,
2510                                        le16_to_cpu(priv->staging_rxon.channel));
2511
2512         if (!ch_info)
2513                 ch_info = &priv->channel_info[0];
2514
2515         /*
2516          * in some case A channels are all non IBSS
2517          * in this case force B/G channel
2518          */
2519         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2520             !(is_channel_ibss(ch_info)))
2521                 ch_info = &priv->channel_info[0];
2522
2523         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2524         if (is_channel_a_band(ch_info))
2525                 priv->phymode = MODE_IEEE80211A;
2526         else
2527                 priv->phymode = MODE_IEEE80211G;
2528
2529         iwl3945_set_flags_for_phymode(priv, priv->phymode);
2530
2531         priv->staging_rxon.ofdm_basic_rates =
2532             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2533         priv->staging_rxon.cck_basic_rates =
2534             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2535 }
2536
2537 static int iwl3945_set_mode(struct iwl3945_priv *priv, int mode)
2538 {
2539         if (mode == IEEE80211_IF_TYPE_IBSS) {
2540                 const struct iwl3945_channel_info *ch_info;
2541
2542                 ch_info = iwl3945_get_channel_info(priv,
2543                         priv->phymode,
2544                         le16_to_cpu(priv->staging_rxon.channel));
2545
2546                 if (!ch_info || !is_channel_ibss(ch_info)) {
2547                         IWL_ERROR("channel %d not IBSS channel\n",
2548                                   le16_to_cpu(priv->staging_rxon.channel));
2549                         return -EINVAL;
2550                 }
2551         }
2552
2553         priv->iw_mode = mode;
2554
2555         iwl3945_connection_init_rx_config(priv);
2556         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2557
2558         iwl3945_clear_stations_table(priv);
2559
2560         /* dont commit rxon if rf-kill is on*/
2561         if (!iwl3945_is_ready_rf(priv))
2562                 return -EAGAIN;
2563
2564         cancel_delayed_work(&priv->scan_check);
2565         if (iwl3945_scan_cancel_timeout(priv, 100)) {
2566                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2567                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2568                 return -EAGAIN;
2569         }
2570
2571         iwl3945_commit_rxon(priv);
2572
2573         return 0;
2574 }
2575
2576 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl3945_priv *priv,
2577                                       struct ieee80211_tx_control *ctl,
2578                                       struct iwl3945_cmd *cmd,
2579                                       struct sk_buff *skb_frag,
2580                                       int last_frag)
2581 {
2582         struct iwl3945_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2583
2584         switch (keyinfo->alg) {
2585         case ALG_CCMP:
2586                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2587                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2588                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2589                 break;
2590
2591         case ALG_TKIP:
2592 #if 0
2593                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2594
2595                 if (last_frag)
2596                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2597                                8);
2598                 else
2599                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2600 #endif
2601                 break;
2602
2603         case ALG_WEP:
2604                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2605                     (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2606
2607                 if (keyinfo->keylen == 13)
2608                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2609
2610                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2611
2612                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2613                              "with key %d\n", ctl->key_idx);
2614                 break;
2615
2616         default:
2617                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2618                 break;
2619         }
2620 }
2621
2622 /*
2623  * handle build REPLY_TX command notification.
2624  */
2625 static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
2626                                   struct iwl3945_cmd *cmd,
2627                                   struct ieee80211_tx_control *ctrl,
2628                                   struct ieee80211_hdr *hdr,
2629                                   int is_unicast, u8 std_id)
2630 {
2631         __le16 *qc;
2632         u16 fc = le16_to_cpu(hdr->frame_control);
2633         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2634
2635         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2636         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2637                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2638                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2639                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2640                 if (ieee80211_is_probe_response(fc) &&
2641                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2642                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2643         } else {
2644                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2645                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2646         }
2647
2648         cmd->cmd.tx.sta_id = std_id;
2649         if (ieee80211_get_morefrag(hdr))
2650                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2651
2652         qc = ieee80211_get_qos_ctrl(hdr);
2653         if (qc) {
2654                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2655                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2656         } else
2657                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2658
2659         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2660                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2661                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2662         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2663                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2664                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2665         }
2666
2667         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2668                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2669
2670         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2671         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2672                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2673                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2674                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2675                 else
2676                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2677         } else
2678                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2679
2680         cmd->cmd.tx.driver_txop = 0;
2681         cmd->cmd.tx.tx_flags = tx_flags;
2682         cmd->cmd.tx.next_frame_len = 0;
2683 }
2684
2685 /**
2686  * iwl3945_get_sta_id - Find station's index within station table
2687  */
2688 static int iwl3945_get_sta_id(struct iwl3945_priv *priv, struct ieee80211_hdr *hdr)
2689 {
2690         int sta_id;
2691         u16 fc = le16_to_cpu(hdr->frame_control);
2692
2693         /* If this frame is broadcast or management, use broadcast station id */
2694         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2695             is_multicast_ether_addr(hdr->addr1))
2696                 return priv->hw_setting.bcast_sta_id;
2697
2698         switch (priv->iw_mode) {
2699
2700         /* If we are a client station in a BSS network, use the special
2701          * AP station entry (that's the only station we communicate with) */
2702         case IEEE80211_IF_TYPE_STA:
2703                 return IWL_AP_ID;
2704
2705         /* If we are an AP, then find the station, or use BCAST */
2706         case IEEE80211_IF_TYPE_AP:
2707                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2708                 if (sta_id != IWL_INVALID_STATION)
2709                         return sta_id;
2710                 return priv->hw_setting.bcast_sta_id;
2711
2712         /* If this frame is going out to an IBSS network, find the station,
2713          * or create a new station table entry */
2714         case IEEE80211_IF_TYPE_IBSS: {
2715                 DECLARE_MAC_BUF(mac);
2716
2717                 /* Create new station table entry */
2718                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2719                 if (sta_id != IWL_INVALID_STATION)
2720                         return sta_id;
2721
2722                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2723
2724                 if (sta_id != IWL_INVALID_STATION)
2725                         return sta_id;
2726
2727                 IWL_DEBUG_DROP("Station %s not in station map. "
2728                                "Defaulting to broadcast...\n",
2729                                print_mac(mac, hdr->addr1));
2730                 iwl3945_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2731                 return priv->hw_setting.bcast_sta_id;
2732         }
2733         default:
2734                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2735                 return priv->hw_setting.bcast_sta_id;
2736         }
2737 }
2738
2739 /*
2740  * start REPLY_TX command process
2741  */
2742 static int iwl3945_tx_skb(struct iwl3945_priv *priv,
2743                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2744 {
2745         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2746         struct iwl3945_tfd_frame *tfd;
2747         u32 *control_flags;
2748         int txq_id = ctl->queue;
2749         struct iwl3945_tx_queue *txq = NULL;
2750         struct iwl3945_queue *q = NULL;
2751         dma_addr_t phys_addr;
2752         dma_addr_t txcmd_phys;
2753         struct iwl3945_cmd *out_cmd = NULL;
2754         u16 len, idx, len_org;
2755         u8 id, hdr_len, unicast;
2756         u8 sta_id;
2757         u16 seq_number = 0;
2758         u16 fc;
2759         __le16 *qc;
2760         u8 wait_write_ptr = 0;
2761         unsigned long flags;
2762         int rc;
2763
2764         spin_lock_irqsave(&priv->lock, flags);
2765         if (iwl3945_is_rfkill(priv)) {
2766                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2767                 goto drop_unlock;
2768         }
2769
2770         if (!priv->vif) {
2771                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2772                 goto drop_unlock;
2773         }
2774
2775         if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2776                 IWL_ERROR("ERROR: No TX rate available.\n");
2777                 goto drop_unlock;
2778         }
2779
2780         unicast = !is_multicast_ether_addr(hdr->addr1);
2781         id = 0;
2782
2783         fc = le16_to_cpu(hdr->frame_control);
2784
2785 #ifdef CONFIG_IWL3945_DEBUG
2786         if (ieee80211_is_auth(fc))
2787                 IWL_DEBUG_TX("Sending AUTH frame\n");
2788         else if (ieee80211_is_assoc_request(fc))
2789                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2790         else if (ieee80211_is_reassoc_request(fc))
2791                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2792 #endif
2793
2794         /* drop all data frame if we are not associated */
2795         if (!iwl3945_is_associated(priv) && !priv->assoc_id &&
2796             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2797                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
2798                 goto drop_unlock;
2799         }
2800
2801         spin_unlock_irqrestore(&priv->lock, flags);
2802
2803         hdr_len = ieee80211_get_hdrlen(fc);
2804
2805         /* Find (or create) index into station table for destination station */
2806         sta_id = iwl3945_get_sta_id(priv, hdr);
2807         if (sta_id == IWL_INVALID_STATION) {
2808                 DECLARE_MAC_BUF(mac);
2809
2810                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2811                                print_mac(mac, hdr->addr1));
2812                 goto drop;
2813         }
2814
2815         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2816
2817         qc = ieee80211_get_qos_ctrl(hdr);
2818         if (qc) {
2819                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2820                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2821                                 IEEE80211_SCTL_SEQ;
2822                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2823                         (hdr->seq_ctrl &
2824                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2825                 seq_number += 0x10;
2826         }
2827
2828         /* Descriptor for chosen Tx queue */
2829         txq = &priv->txq[txq_id];
2830         q = &txq->q;
2831
2832         spin_lock_irqsave(&priv->lock, flags);
2833
2834         /* Set up first empty TFD within this queue's circular TFD buffer */
2835         tfd = &txq->bd[q->write_ptr];
2836         memset(tfd, 0, sizeof(*tfd));
2837         control_flags = (u32 *) tfd;
2838         idx = get_cmd_index(q, q->write_ptr, 0);
2839
2840         /* Set up driver data for this TFD */
2841         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2842         txq->txb[q->write_ptr].skb[0] = skb;
2843         memcpy(&(txq->txb[q->write_ptr].status.control),
2844                ctl, sizeof(struct ieee80211_tx_control));
2845
2846         /* Init first empty entry in queue's array of Tx/cmd buffers */
2847         out_cmd = &txq->cmd[idx];
2848         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2849         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2850
2851         /*
2852          * Set up the Tx-command (not MAC!) header.
2853          * Store the chosen Tx queue and TFD index within the sequence field;
2854          * after Tx, uCode's Tx response will return this value so driver can
2855          * locate the frame within the tx queue and do post-tx processing.
2856          */
2857         out_cmd->hdr.cmd = REPLY_TX;
2858         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2859                                 INDEX_TO_SEQ(q->write_ptr)));
2860
2861         /* Copy MAC header from skb into command buffer */
2862         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2863
2864         /*
2865          * Use the first empty entry in this queue's command buffer array
2866          * to contain the Tx command and MAC header concatenated together
2867          * (payload data will be in another buffer).
2868          * Size of this varies, due to varying MAC header length.
2869          * If end is not dword aligned, we'll have 2 extra bytes at the end
2870          * of the MAC header (device reads on dword boundaries).
2871          * We'll tell device about this padding later.
2872          */
2873         len = priv->hw_setting.tx_cmd_len +
2874                 sizeof(struct iwl3945_cmd_header) + hdr_len;
2875
2876         len_org = len;
2877         len = (len + 3) & ~3;
2878
2879         if (len_org != len)
2880                 len_org = 1;
2881         else
2882                 len_org = 0;
2883
2884         /* Physical address of this Tx command's header (not MAC header!),
2885          * within command buffer array. */
2886         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
2887                      offsetof(struct iwl3945_cmd, hdr);
2888
2889         /* Add buffer containing Tx command and MAC(!) header to TFD's
2890          * first entry */
2891         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2892
2893         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2894                 iwl3945_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2895
2896         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2897          * if any (802.11 null frames have no payload). */
2898         len = skb->len - hdr_len;
2899         if (len) {
2900                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2901                                            len, PCI_DMA_TODEVICE);
2902                 iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2903         }
2904
2905         if (!len)
2906                 /* If there is no payload, then we use only one Tx buffer */
2907                 *control_flags = TFD_CTL_COUNT_SET(1);
2908         else
2909                 /* Else use 2 buffers.
2910                  * Tell 3945 about any padding after MAC header */
2911                 *control_flags = TFD_CTL_COUNT_SET(2) |
2912                         TFD_CTL_PAD_SET(U32_PAD(len));
2913
2914         /* Total # bytes to be transmitted */
2915         len = (u16)skb->len;
2916         out_cmd->cmd.tx.len = cpu_to_le16(len);
2917
2918         /* TODO need this for burst mode later on */
2919         iwl3945_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2920
2921         /* set is_hcca to 0; it probably will never be implemented */
2922         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2923
2924         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2925         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2926
2927         if (!ieee80211_get_morefrag(hdr)) {
2928                 txq->need_update = 1;
2929                 if (qc) {
2930                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2931                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2932                 }
2933         } else {
2934                 wait_write_ptr = 1;
2935                 txq->need_update = 0;
2936         }
2937
2938         iwl3945_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2939                            sizeof(out_cmd->cmd.tx));
2940
2941         iwl3945_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2942                            ieee80211_get_hdrlen(fc));
2943
2944         /* Tell device the write index *just past* this latest filled TFD */
2945         q->write_ptr = iwl3945_queue_inc_wrap(q->write_ptr, q->n_bd);
2946         rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
2947         spin_unlock_irqrestore(&priv->lock, flags);
2948
2949         if (rc)
2950                 return rc;
2951
2952         if ((iwl3945_queue_space(q) < q->high_mark)
2953             && priv->mac80211_registered) {
2954                 if (wait_write_ptr) {
2955                         spin_lock_irqsave(&priv->lock, flags);
2956                         txq->need_update = 1;
2957                         iwl3945_tx_queue_update_write_ptr(priv, txq);
2958                         spin_unlock_irqrestore(&priv->lock, flags);
2959                 }
2960
2961                 ieee80211_stop_queue(priv->hw, ctl->queue);
2962         }
2963
2964         return 0;
2965
2966 drop_unlock:
2967         spin_unlock_irqrestore(&priv->lock, flags);
2968 drop:
2969         return -1;
2970 }
2971
2972 static void iwl3945_set_rate(struct iwl3945_priv *priv)
2973 {
2974         const struct ieee80211_hw_mode *hw = NULL;
2975         struct ieee80211_rate *rate;
2976         int i;
2977
2978         hw = iwl3945_get_hw_mode(priv, priv->phymode);
2979         if (!hw) {
2980                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2981                 return;
2982         }
2983
2984         priv->active_rate = 0;
2985         priv->active_rate_basic = 0;
2986
2987         IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
2988                        hw->mode == MODE_IEEE80211A ?
2989                        'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
2990
2991         for (i = 0; i < hw->num_rates; i++) {
2992                 rate = &(hw->rates[i]);
2993                 if ((rate->val < IWL_RATE_COUNT) &&
2994                     (rate->flags & IEEE80211_RATE_SUPPORTED)) {
2995                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
2996                                        rate->val, iwl3945_rates[rate->val].plcp,
2997                                        (rate->flags & IEEE80211_RATE_BASIC) ?
2998                                        "*" : "");
2999                         priv->active_rate |= (1 << rate->val);
3000                         if (rate->flags & IEEE80211_RATE_BASIC)
3001                                 priv->active_rate_basic |= (1 << rate->val);
3002                 } else
3003                         IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
3004                                        rate->val, iwl3945_rates[rate->val].plcp);
3005         }
3006
3007         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
3008                        priv->active_rate, priv->active_rate_basic);
3009
3010         /*
3011          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
3012          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
3013          * OFDM
3014          */
3015         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
3016                 priv->staging_rxon.cck_basic_rates =
3017                     ((priv->active_rate_basic &
3018                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
3019         else
3020                 priv->staging_rxon.cck_basic_rates =
3021                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
3022
3023         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
3024                 priv->staging_rxon.ofdm_basic_rates =
3025                     ((priv->active_rate_basic &
3026                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
3027                       IWL_FIRST_OFDM_RATE) & 0xFF;
3028         else
3029                 priv->staging_rxon.ofdm_basic_rates =
3030                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
3031 }
3032
3033 static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
3034 {
3035         unsigned long flags;
3036
3037         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
3038                 return;
3039
3040         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
3041                           disable_radio ? "OFF" : "ON");
3042
3043         if (disable_radio) {
3044                 iwl3945_scan_cancel(priv);
3045                 /* FIXME: This is a workaround for AP */
3046                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
3047                         spin_lock_irqsave(&priv->lock, flags);
3048                         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3049                                     CSR_UCODE_SW_BIT_RFKILL);
3050                         spin_unlock_irqrestore(&priv->lock, flags);
3051                         iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
3052                         set_bit(STATUS_RF_KILL_SW, &priv->status);
3053                 }
3054                 return;
3055         }
3056
3057         spin_lock_irqsave(&priv->lock, flags);
3058         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3059
3060         clear_bit(STATUS_RF_KILL_SW, &priv->status);
3061         spin_unlock_irqrestore(&priv->lock, flags);
3062
3063         /* wake up ucode */
3064         msleep(10);
3065
3066         spin_lock_irqsave(&priv->lock, flags);
3067         iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3068         if (!iwl3945_grab_nic_access(priv))
3069                 iwl3945_release_nic_access(priv);
3070         spin_unlock_irqrestore(&priv->lock, flags);
3071
3072         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3073                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3074                                   "disabled by HW switch\n");
3075                 return;
3076         }
3077
3078         queue_work(priv->workqueue, &priv->restart);
3079         return;
3080 }
3081
3082 void iwl3945_set_decrypted_flag(struct iwl3945_priv *priv, struct sk_buff *skb,
3083                             u32 decrypt_res, struct ieee80211_rx_status *stats)
3084 {
3085         u16 fc =
3086             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3087
3088         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3089                 return;
3090
3091         if (!(fc & IEEE80211_FCTL_PROTECTED))
3092                 return;
3093
3094         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3095         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3096         case RX_RES_STATUS_SEC_TYPE_TKIP:
3097                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3098                     RX_RES_STATUS_BAD_ICV_MIC)
3099                         stats->flag |= RX_FLAG_MMIC_ERROR;
3100         case RX_RES_STATUS_SEC_TYPE_WEP:
3101         case RX_RES_STATUS_SEC_TYPE_CCMP:
3102                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3103                     RX_RES_STATUS_DECRYPT_OK) {
3104                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3105                         stats->flag |= RX_FLAG_DECRYPTED;
3106                 }
3107                 break;
3108
3109         default:
3110                 break;
3111         }
3112 }
3113
3114 #define IWL_PACKET_RETRY_TIME HZ
3115
3116 int iwl3945_is_duplicate_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
3117 {
3118         u16 sc = le16_to_cpu(header->seq_ctrl);
3119         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3120         u16 frag = sc & IEEE80211_SCTL_FRAG;
3121         u16 *last_seq, *last_frag;
3122         unsigned long *last_time;
3123
3124         switch (priv->iw_mode) {
3125         case IEEE80211_IF_TYPE_IBSS:{
3126                 struct list_head *p;
3127                 struct iwl3945_ibss_seq *entry = NULL;
3128                 u8 *mac = header->addr2;
3129                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3130
3131                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3132                         entry = list_entry(p, struct iwl3945_ibss_seq, list);
3133                         if (!compare_ether_addr(entry->mac, mac))
3134                                 break;
3135                 }
3136                 if (p == &priv->ibss_mac_hash[index]) {
3137                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3138                         if (!entry) {
3139                                 IWL_ERROR("Cannot malloc new mac entry\n");
3140                                 return 0;
3141                         }
3142                         memcpy(entry->mac, mac, ETH_ALEN);
3143                         entry->seq_num = seq;
3144                         entry->frag_num = frag;
3145                         entry->packet_time = jiffies;
3146                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
3147                         return 0;
3148                 }
3149                 last_seq = &entry->seq_num;
3150                 last_frag = &entry->frag_num;
3151                 last_time = &entry->packet_time;
3152                 break;
3153         }
3154         case IEEE80211_IF_TYPE_STA:
3155                 last_seq = &priv->last_seq_num;
3156                 last_frag = &priv->last_frag_num;
3157                 last_time = &priv->last_packet_time;
3158                 break;
3159         default:
3160                 return 0;
3161         }
3162         if ((*last_seq == seq) &&
3163             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3164                 if (*last_frag == frag)
3165                         goto drop;
3166                 if (*last_frag + 1 != frag)
3167                         /* out-of-order fragment */
3168                         goto drop;
3169         } else
3170                 *last_seq = seq;
3171
3172         *last_frag = frag;
3173         *last_time = jiffies;
3174         return 0;
3175
3176  drop:
3177         return 1;
3178 }
3179
3180 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3181
3182 #include "iwl-spectrum.h"
3183
3184 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3185 #define BEACON_TIME_MASK_HIGH   0xFF000000
3186 #define TIME_UNIT               1024
3187
3188 /*
3189  * extended beacon time format
3190  * time in usec will be changed into a 32-bit value in 8:24 format
3191  * the high 1 byte is the beacon counts
3192  * the lower 3 bytes is the time in usec within one beacon interval
3193  */
3194
3195 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
3196 {
3197         u32 quot;
3198         u32 rem;
3199         u32 interval = beacon_interval * 1024;
3200
3201         if (!interval || !usec)
3202                 return 0;
3203
3204         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3205         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3206
3207         return (quot << 24) + rem;
3208 }
3209
3210 /* base is usually what we get from ucode with each received frame,
3211  * the same as HW timer counter counting down
3212  */
3213
3214 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3215 {
3216         u32 base_low = base & BEACON_TIME_MASK_LOW;
3217         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3218         u32 interval = beacon_interval * TIME_UNIT;
3219         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3220             (addon & BEACON_TIME_MASK_HIGH);
3221
3222         if (base_low > addon_low)
3223                 res += base_low - addon_low;
3224         else if (base_low < addon_low) {
3225                 res += interval + base_low - addon_low;
3226                 res += (1 << 24);
3227         } else
3228                 res += (1 << 24);
3229
3230         return cpu_to_le32(res);
3231 }
3232
3233 static int iwl3945_get_measurement(struct iwl3945_priv *priv,
3234                                struct ieee80211_measurement_params *params,
3235                                u8 type)
3236 {
3237         struct iwl3945_spectrum_cmd spectrum;
3238         struct iwl3945_rx_packet *res;
3239         struct iwl3945_host_cmd cmd = {
3240                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3241                 .data = (void *)&spectrum,
3242                 .meta.flags = CMD_WANT_SKB,
3243         };
3244         u32 add_time = le64_to_cpu(params->start_time);
3245         int rc;
3246         int spectrum_resp_status;
3247         int duration = le16_to_cpu(params->duration);
3248
3249         if (iwl3945_is_associated(priv))
3250                 add_time =
3251                     iwl3945_usecs_to_beacons(
3252                         le64_to_cpu(params->start_time) - priv->last_tsf,
3253                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3254
3255         memset(&spectrum, 0, sizeof(spectrum));
3256
3257         spectrum.channel_count = cpu_to_le16(1);
3258         spectrum.flags =
3259             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3260         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3261         cmd.len = sizeof(spectrum);
3262         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3263
3264         if (iwl3945_is_associated(priv))
3265                 spectrum.start_time =
3266                     iwl3945_add_beacon_time(priv->last_beacon_time,
3267                                 add_time,
3268                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3269         else
3270                 spectrum.start_time = 0;
3271
3272         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3273         spectrum.channels[0].channel = params->channel;
3274         spectrum.channels[0].type = type;
3275         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3276                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3277                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3278
3279         rc = iwl3945_send_cmd_sync(priv, &cmd);
3280         if (rc)
3281                 return rc;
3282
3283         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
3284         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3285                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3286                 rc = -EIO;
3287         }
3288
3289         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3290         switch (spectrum_resp_status) {
3291         case 0:         /* Command will be handled */
3292                 if (res->u.spectrum.id != 0xff) {
3293                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
3294                                                 res->u.spectrum.id);
3295                         priv->measurement_status &= ~MEASUREMENT_READY;
3296                 }
3297                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3298                 rc = 0;
3299                 break;
3300
3301         case 1:         /* Command will not be handled */
3302                 rc = -EAGAIN;
3303                 break;
3304         }
3305
3306         dev_kfree_skb_any(cmd.meta.u.skb);
3307
3308         return rc;
3309 }
3310 #endif
3311
3312 static void iwl3945_txstatus_to_ieee(struct iwl3945_priv *priv,
3313                                  struct iwl3945_tx_info *tx_sta)
3314 {
3315
3316         tx_sta->status.ack_signal = 0;
3317         tx_sta->status.excessive_retries = 0;
3318         tx_sta->status.queue_length = 0;
3319         tx_sta->status.queue_number = 0;
3320
3321         if (in_interrupt())
3322                 ieee80211_tx_status_irqsafe(priv->hw,
3323                                             tx_sta->skb[0], &(tx_sta->status));
3324         else
3325                 ieee80211_tx_status(priv->hw,
3326                                     tx_sta->skb[0], &(tx_sta->status));
3327
3328         tx_sta->skb[0] = NULL;
3329 }
3330
3331 /**
3332  * iwl3945_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
3333  *
3334  * When FW advances 'R' index, all entries between old and new 'R' index
3335  * need to be reclaimed. As result, some free space forms. If there is
3336  * enough free space (> low mark), wake the stack that feeds us.
3337  */
3338 static int iwl3945_tx_queue_reclaim(struct iwl3945_priv *priv, int txq_id, int index)
3339 {
3340         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3341         struct iwl3945_queue *q = &txq->q;
3342         int nfreed = 0;
3343
3344         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3345                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3346                           "is out of range [0-%d] %d %d.\n", txq_id,
3347                           index, q->n_bd, q->write_ptr, q->read_ptr);
3348                 return 0;
3349         }
3350
3351         for (index = iwl3945_queue_inc_wrap(index, q->n_bd);
3352                 q->read_ptr != index;
3353                 q->read_ptr = iwl3945_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3354                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3355                         iwl3945_txstatus_to_ieee(priv,
3356                                         &(txq->txb[txq->q.read_ptr]));
3357                         iwl3945_hw_txq_free_tfd(priv, txq);
3358                 } else if (nfreed > 1) {
3359                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3360                                         q->write_ptr, q->read_ptr);
3361                         queue_work(priv->workqueue, &priv->restart);
3362                 }
3363                 nfreed++;
3364         }
3365
3366         if (iwl3945_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3367                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3368                         priv->mac80211_registered)
3369                 ieee80211_wake_queue(priv->hw, txq_id);
3370
3371
3372         return nfreed;
3373 }
3374
3375 static int iwl3945_is_tx_success(u32 status)
3376 {
3377         return (status & 0xFF) == 0x1;
3378 }
3379
3380 /******************************************************************************
3381  *
3382  * Generic RX handler implementations
3383  *
3384  ******************************************************************************/
3385 /**
3386  * iwl3945_rx_reply_tx - Handle Tx response
3387  */
3388 static void iwl3945_rx_reply_tx(struct iwl3945_priv *priv,
3389                             struct iwl3945_rx_mem_buffer *rxb)
3390 {
3391         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3392         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3393         int txq_id = SEQ_TO_QUEUE(sequence);
3394         int index = SEQ_TO_INDEX(sequence);
3395         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3396         struct ieee80211_tx_status *tx_status;
3397         struct iwl3945_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3398         u32  status = le32_to_cpu(tx_resp->status);
3399
3400         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3401                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3402                           "is out of range [0-%d] %d %d\n", txq_id,
3403                           index, txq->q.n_bd, txq->q.write_ptr,
3404                           txq->q.read_ptr);
3405                 return;
3406         }
3407
3408         tx_status = &(txq->txb[txq->q.read_ptr].status);
3409
3410         tx_status->retry_count = tx_resp->failure_frame;
3411         tx_status->queue_number = status;
3412         tx_status->queue_length = tx_resp->bt_kill_count;
3413         tx_status->queue_length |= tx_resp->failure_rts;
3414
3415         tx_status->flags =
3416             iwl3945_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3417
3418         tx_status->control.tx_rate = iwl3945_rate_index_from_plcp(tx_resp->rate);
3419
3420         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
3421                         txq_id, iwl3945_get_tx_fail_reason(status), status,
3422                         tx_resp->rate, tx_resp->failure_frame);
3423
3424         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3425         if (index != -1)
3426                 iwl3945_tx_queue_reclaim(priv, txq_id, index);
3427
3428         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3429                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3430 }
3431
3432
3433 static void iwl3945_rx_reply_alive(struct iwl3945_priv *priv,
3434                                struct iwl3945_rx_mem_buffer *rxb)
3435 {
3436         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3437         struct iwl3945_alive_resp *palive;
3438         struct delayed_work *pwork;
3439
3440         palive = &pkt->u.alive_frame;
3441
3442         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3443                        "0x%01X 0x%01X\n",
3444                        palive->is_valid, palive->ver_type,
3445                        palive->ver_subtype);
3446
3447         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3448                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3449                 memcpy(&priv->card_alive_init,
3450                        &pkt->u.alive_frame,
3451                        sizeof(struct iwl3945_init_alive_resp));
3452                 pwork = &priv->init_alive_start;
3453         } else {
3454                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3455                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3456                        sizeof(struct iwl3945_alive_resp));
3457                 pwork = &priv->alive_start;
3458                 iwl3945_disable_events(priv);
3459         }
3460
3461         /* We delay the ALIVE response by 5ms to
3462          * give the HW RF Kill time to activate... */
3463         if (palive->is_valid == UCODE_VALID_OK)
3464                 queue_delayed_work(priv->workqueue, pwork,
3465                                    msecs_to_jiffies(5));
3466         else
3467                 IWL_WARNING("uCode did not respond OK.\n");
3468 }
3469
3470 static void iwl3945_rx_reply_add_sta(struct iwl3945_priv *priv,
3471                                  struct iwl3945_rx_mem_buffer *rxb)
3472 {
3473         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3474
3475         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3476         return;
3477 }
3478
3479 static void iwl3945_rx_reply_error(struct iwl3945_priv *priv,
3480                                struct iwl3945_rx_mem_buffer *rxb)
3481 {
3482         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3483
3484         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3485                 "seq 0x%04X ser 0x%08X\n",
3486                 le32_to_cpu(pkt->u.err_resp.error_type),
3487                 get_cmd_string(pkt->u.err_resp.cmd_id),
3488                 pkt->u.err_resp.cmd_id,
3489                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3490                 le32_to_cpu(pkt->u.err_resp.error_info));
3491 }
3492
3493 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3494
3495 static void iwl3945_rx_csa(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
3496 {
3497         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3498         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active_rxon;
3499         struct iwl3945_csa_notification *csa = &(pkt->u.csa_notif);
3500         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3501                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3502         rxon->channel = csa->channel;
3503         priv->staging_rxon.channel = csa->channel;
3504 }
3505
3506 static void iwl3945_rx_spectrum_measure_notif(struct iwl3945_priv *priv,
3507                                           struct iwl3945_rx_mem_buffer *rxb)
3508 {
3509 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3510         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3511         struct iwl3945_spectrum_notification *report = &(pkt->u.spectrum_notif);
3512
3513         if (!report->state) {
3514                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3515                           "Spectrum Measure Notification: Start\n");
3516                 return;
3517         }
3518
3519         memcpy(&priv->measure_report, report, sizeof(*report));
3520         priv->measurement_status |= MEASUREMENT_READY;
3521 #endif
3522 }
3523
3524 static void iwl3945_rx_pm_sleep_notif(struct iwl3945_priv *priv,
3525                                   struct iwl3945_rx_mem_buffer *rxb)
3526 {
3527 #ifdef CONFIG_IWL3945_DEBUG
3528         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3529         struct iwl3945_sleep_notification *sleep = &(pkt->u.sleep_notif);
3530         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3531                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3532 #endif
3533 }
3534
3535 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl3945_priv *priv,
3536                                              struct iwl3945_rx_mem_buffer *rxb)
3537 {
3538         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3539         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3540                         "notification for %s:\n",
3541                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3542         iwl3945_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3543 }
3544
3545 static void iwl3945_bg_beacon_update(struct work_struct *work)
3546 {
3547         struct iwl3945_priv *priv =
3548                 container_of(work, struct iwl3945_priv, beacon_update);
3549         struct sk_buff *beacon;
3550
3551         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3552         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3553
3554         if (!beacon) {
3555                 IWL_ERROR("update beacon failed\n");
3556                 return;
3557         }
3558
3559         mutex_lock(&priv->mutex);
3560         /* new beacon skb is allocated every time; dispose previous.*/
3561         if (priv->ibss_beacon)
3562                 dev_kfree_skb(priv->ibss_beacon);
3563
3564         priv->ibss_beacon = beacon;
3565         mutex_unlock(&priv->mutex);
3566
3567         iwl3945_send_beacon_cmd(priv);
3568 }
3569
3570 static void iwl3945_rx_beacon_notif(struct iwl3945_priv *priv,
3571                                 struct iwl3945_rx_mem_buffer *rxb)
3572 {
3573 #ifdef CONFIG_IWL3945_DEBUG
3574         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3575         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
3576         u8 rate = beacon->beacon_notify_hdr.rate;
3577
3578         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3579                 "tsf %d %d rate %d\n",
3580                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3581                 beacon->beacon_notify_hdr.failure_frame,
3582                 le32_to_cpu(beacon->ibss_mgr_status),
3583                 le32_to_cpu(beacon->high_tsf),
3584                 le32_to_cpu(beacon->low_tsf), rate);
3585 #endif
3586
3587         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3588             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3589                 queue_work(priv->workqueue, &priv->beacon_update);
3590 }
3591
3592 /* Service response to REPLY_SCAN_CMD (0x80) */
3593 static void iwl3945_rx_reply_scan(struct iwl3945_priv *priv,
3594                               struct iwl3945_rx_mem_buffer *rxb)
3595 {
3596 #ifdef CONFIG_IWL3945_DEBUG
3597         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3598         struct iwl3945_scanreq_notification *notif =
3599             (struct iwl3945_scanreq_notification *)pkt->u.raw;
3600
3601         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3602 #endif
3603 }
3604
3605 /* Service SCAN_START_NOTIFICATION (0x82) */
3606 static void iwl3945_rx_scan_start_notif(struct iwl3945_priv *priv,
3607                                     struct iwl3945_rx_mem_buffer *rxb)
3608 {
3609         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3610         struct iwl3945_scanstart_notification *notif =
3611             (struct iwl3945_scanstart_notification *)pkt->u.raw;
3612         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3613         IWL_DEBUG_SCAN("Scan start: "
3614                        "%d [802.11%s] "
3615                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3616                        notif->channel,
3617                        notif->band ? "bg" : "a",
3618                        notif->tsf_high,
3619                        notif->tsf_low, notif->status, notif->beacon_timer);
3620 }
3621
3622 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3623 static void iwl3945_rx_scan_results_notif(struct iwl3945_priv *priv,
3624                                       struct iwl3945_rx_mem_buffer *rxb)
3625 {
3626         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3627         struct iwl3945_scanresults_notification *notif =
3628             (struct iwl3945_scanresults_notification *)pkt->u.raw;
3629
3630         IWL_DEBUG_SCAN("Scan ch.res: "
3631                        "%d [802.11%s] "
3632                        "(TSF: 0x%08X:%08X) - %d "
3633                        "elapsed=%lu usec (%dms since last)\n",
3634                        notif->channel,
3635                        notif->band ? "bg" : "a",
3636                        le32_to_cpu(notif->tsf_high),
3637                        le32_to_cpu(notif->tsf_low),
3638                        le32_to_cpu(notif->statistics[0]),
3639                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3640                        jiffies_to_msecs(elapsed_jiffies
3641                                         (priv->last_scan_jiffies, jiffies)));
3642
3643         priv->last_scan_jiffies = jiffies;
3644         priv->next_scan_jiffies = 0;
3645 }
3646
3647 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3648 static void iwl3945_rx_scan_complete_notif(struct iwl3945_priv *priv,
3649                                        struct iwl3945_rx_mem_buffer *rxb)
3650 {
3651         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3652         struct iwl3945_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3653
3654         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3655                        scan_notif->scanned_channels,
3656                        scan_notif->tsf_low,
3657                        scan_notif->tsf_high, scan_notif->status);
3658
3659         /* The HW is no longer scanning */
3660         clear_bit(STATUS_SCAN_HW, &priv->status);
3661
3662         /* The scan completion notification came in, so kill that timer... */
3663         cancel_delayed_work(&priv->scan_check);
3664
3665         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3666                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3667                        jiffies_to_msecs(elapsed_jiffies
3668                                         (priv->scan_pass_start, jiffies)));
3669
3670         /* Remove this scanned band from the list
3671          * of pending bands to scan */
3672         priv->scan_bands--;
3673
3674         /* If a request to abort was given, or the scan did not succeed
3675          * then we reset the scan state machine and terminate,
3676          * re-queuing another scan if one has been requested */
3677         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3678                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3679                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3680         } else {
3681                 /* If there are more bands on this scan pass reschedule */
3682                 if (priv->scan_bands > 0)
3683                         goto reschedule;
3684         }
3685
3686         priv->last_scan_jiffies = jiffies;
3687         priv->next_scan_jiffies = 0;
3688         IWL_DEBUG_INFO("Setting scan to off\n");
3689
3690         clear_bit(STATUS_SCANNING, &priv->status);
3691
3692         IWL_DEBUG_INFO("Scan took %dms\n",
3693                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3694
3695         queue_work(priv->workqueue, &priv->scan_completed);
3696
3697         return;
3698
3699 reschedule:
3700         priv->scan_pass_start = jiffies;
3701         queue_work(priv->workqueue, &priv->request_scan);
3702 }
3703
3704 /* Handle notification from uCode that card's power state is changing
3705  * due to software, hardware, or critical temperature RFKILL */
3706 static void iwl3945_rx_card_state_notif(struct iwl3945_priv *priv,
3707                                     struct iwl3945_rx_mem_buffer *rxb)
3708 {
3709         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3710         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3711         unsigned long status = priv->status;
3712
3713         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3714                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3715                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3716
3717         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3718                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3719
3720         if (flags & HW_CARD_DISABLED)
3721                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3722         else
3723                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3724
3725
3726         if (flags & SW_CARD_DISABLED)
3727                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3728         else
3729                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3730
3731         iwl3945_scan_cancel(priv);
3732
3733         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3734              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3735             (test_bit(STATUS_RF_KILL_SW, &status) !=
3736              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3737                 queue_work(priv->workqueue, &priv->rf_kill);
3738         else
3739                 wake_up_interruptible(&priv->wait_command_queue);
3740 }
3741
3742 /**
3743  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
3744  *
3745  * Setup the RX handlers for each of the reply types sent from the uCode
3746  * to the host.
3747  *
3748  * This function chains into the hardware specific files for them to setup
3749  * any hardware specific handlers as well.
3750  */
3751 static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
3752 {
3753         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
3754         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
3755         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
3756         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
3757         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3758             iwl3945_rx_spectrum_measure_notif;
3759         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
3760         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3761             iwl3945_rx_pm_debug_statistics_notif;
3762         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
3763
3764         /*
3765          * The same handler is used for both the REPLY to a discrete
3766          * statistics request from the host as well as for the periodic
3767          * statistics notifications (after received beacons) from the uCode.
3768          */
3769         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
3770         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
3771
3772         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
3773         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
3774         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3775             iwl3945_rx_scan_results_notif;
3776         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3777             iwl3945_rx_scan_complete_notif;
3778         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
3779         priv->rx_handlers[REPLY_TX] = iwl3945_rx_reply_tx;
3780
3781         /* Set up hardware specific Rx handlers */
3782         iwl3945_hw_rx_handler_setup(priv);
3783 }
3784
3785 /**
3786  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3787  * @rxb: Rx buffer to reclaim
3788  *
3789  * If an Rx buffer has an async callback associated with it the callback
3790  * will be executed.  The attached skb (if present) will only be freed
3791  * if the callback returns 1
3792  */
3793 static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
3794                                 struct iwl3945_rx_mem_buffer *rxb)
3795 {
3796         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3797         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3798         int txq_id = SEQ_TO_QUEUE(sequence);
3799         int index = SEQ_TO_INDEX(sequence);
3800         int huge = sequence & SEQ_HUGE_FRAME;
3801         int cmd_index;
3802         struct iwl3945_cmd *cmd;
3803
3804         /* If a Tx command is being handled and it isn't in the actual
3805          * command queue then there a command routing bug has been introduced
3806          * in the queue management code. */
3807         if (txq_id != IWL_CMD_QUEUE_NUM)
3808                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3809                           txq_id, pkt->hdr.cmd);
3810         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3811
3812         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3813         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3814
3815         /* Input error checking is done when commands are added to queue. */
3816         if (cmd->meta.flags & CMD_WANT_SKB) {
3817                 cmd->meta.source->u.skb = rxb->skb;
3818                 rxb->skb = NULL;
3819         } else if (cmd->meta.u.callback &&
3820                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3821                 rxb->skb = NULL;
3822
3823         iwl3945_tx_queue_reclaim(priv, txq_id, index);
3824
3825         if (!(cmd->meta.flags & CMD_ASYNC)) {
3826                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3827                 wake_up_interruptible(&priv->wait_command_queue);
3828         }
3829 }
3830
3831 /************************** RX-FUNCTIONS ****************************/
3832 /*
3833  * Rx theory of operation
3834  *
3835  * The host allocates 32 DMA target addresses and passes the host address
3836  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3837  * 0 to 31
3838  *
3839  * Rx Queue Indexes
3840  * The host/firmware share two index registers for managing the Rx buffers.
3841  *
3842  * The READ index maps to the first position that the firmware may be writing
3843  * to -- the driver can read up to (but not including) this position and get
3844  * good data.
3845  * The READ index is managed by the firmware once the card is enabled.
3846  *
3847  * The WRITE index maps to the last position the driver has read from -- the
3848  * position preceding WRITE is the last slot the firmware can place a packet.
3849  *
3850  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3851  * WRITE = READ.
3852  *
3853  * During initialization, the host sets up the READ queue position to the first
3854  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3855  *
3856  * When the firmware places a packet in a buffer, it will advance the READ index
3857  * and fire the RX interrupt.  The driver can then query the READ index and
3858  * process as many packets as possible, moving the WRITE index forward as it
3859  * resets the Rx queue buffers with new memory.
3860  *
3861  * The management in the driver is as follows:
3862  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3863  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3864  *   to replenish the iwl->rxq->rx_free.
3865  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
3866  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3867  *   'processed' and 'read' driver indexes as well)
3868  * + A received packet is processed and handed to the kernel network stack,
3869  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3870  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3871  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3872  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3873  *   were enough free buffers and RX_STALLED is set it is cleared.
3874  *
3875  *
3876  * Driver sequence:
3877  *
3878  * iwl3945_rx_queue_alloc()   Allocates rx_free
3879  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3880  *                            iwl3945_rx_queue_restock
3881  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
3882  *                            queue, updates firmware pointers, and updates
3883  *                            the WRITE index.  If insufficient rx_free buffers
3884  *                            are available, schedules iwl3945_rx_replenish
3885  *
3886  * -- enable interrupts --
3887  * ISR - iwl3945_rx()         Detach iwl3945_rx_mem_buffers from pool up to the
3888  *                            READ INDEX, detaching the SKB from the pool.
3889  *                            Moves the packet buffer from queue to rx_used.
3890  *                            Calls iwl3945_rx_queue_restock to refill any empty
3891  *                            slots.
3892  * ...
3893  *
3894  */
3895
3896 /**
3897  * iwl3945_rx_queue_space - Return number of free slots available in queue.
3898  */
3899 static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
3900 {
3901         int s = q->read - q->write;
3902         if (s <= 0)
3903                 s += RX_QUEUE_SIZE;
3904         /* keep some buffer to not confuse full and empty queue */
3905         s -= 2;
3906         if (s < 0)
3907                 s = 0;
3908         return s;
3909 }
3910
3911 /**
3912  * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3913  */
3914 int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
3915 {
3916         u32 reg = 0;
3917         int rc = 0;
3918         unsigned long flags;
3919
3920         spin_lock_irqsave(&q->lock, flags);
3921
3922         if (q->need_update == 0)
3923                 goto exit_unlock;
3924
3925         /* If power-saving is in use, make sure device is awake */
3926         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3927                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3928
3929                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3930                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3931                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3932                         goto exit_unlock;
3933                 }
3934
3935                 rc = iwl3945_grab_nic_access(priv);
3936                 if (rc)
3937                         goto exit_unlock;
3938
3939                 /* Device expects a multiple of 8 */
3940                 iwl3945_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3941                                      q->write & ~0x7);
3942                 iwl3945_release_nic_access(priv);
3943
3944         /* Else device is assumed to be awake */
3945         } else
3946                 /* Device expects a multiple of 8 */
3947                 iwl3945_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3948
3949
3950         q->need_update = 0;
3951
3952  exit_unlock:
3953         spin_unlock_irqrestore(&q->lock, flags);
3954         return rc;
3955 }
3956
3957 /**
3958  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3959  */
3960 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
3961                                           dma_addr_t dma_addr)
3962 {
3963         return cpu_to_le32((u32)dma_addr);
3964 }
3965
3966 /**
3967  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
3968  *
3969  * If there are slots in the RX queue that need to be restocked,
3970  * and we have free pre-allocated buffers, fill the ranks as much
3971  * as we can, pulling from rx_free.
3972  *
3973  * This moves the 'write' index forward to catch up with 'processed', and
3974  * also updates the memory address in the firmware to reference the new
3975  * target buffer.
3976  */
3977 static int iwl3945_rx_queue_restock(struct iwl3945_priv *priv)
3978 {
3979         struct iwl3945_rx_queue *rxq = &priv->rxq;
3980         struct list_head *element;
3981         struct iwl3945_rx_mem_buffer *rxb;
3982         unsigned long flags;
3983         int write, rc;
3984
3985         spin_lock_irqsave(&rxq->lock, flags);
3986         write = rxq->write & ~0x7;
3987         while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3988                 /* Get next free Rx buffer, remove from free list */
3989                 element = rxq->rx_free.next;
3990                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3991                 list_del(element);
3992
3993                 /* Point to Rx buffer via next RBD in circular buffer */
3994                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3995                 rxq->queue[rxq->write] = rxb;
3996                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3997                 rxq->free_count--;
3998         }
3999         spin_unlock_irqrestore(&rxq->lock, flags);
4000         /* If the pre-allocated buffer pool is dropping low, schedule to
4001          * refill it */
4002         if (rxq->free_count <= RX_LOW_WATERMARK)
4003                 queue_work(priv->workqueue, &priv->rx_replenish);
4004
4005
4006         /* If we've added more space for the firmware to place data, tell it.
4007          * Increment device's write pointer in multiples of 8. */
4008         if ((write != (rxq->write & ~0x7))
4009             || (abs(rxq->write - rxq->read) > 7)) {
4010                 spin_lock_irqsave(&rxq->lock, flags);
4011                 rxq->need_update = 1;
4012                 spin_unlock_irqrestore(&rxq->lock, flags);
4013                 rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
4014                 if (rc)
4015                         return rc;
4016         }
4017
4018         return 0;
4019 }
4020
4021 /**
4022  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
4023  *
4024  * When moving to rx_free an SKB is allocated for the slot.
4025  *
4026  * Also restock the Rx queue via iwl3945_rx_queue_restock.
4027  * This is called as a scheduled work item (except for during initialization)
4028  */
4029 static void iwl3945_rx_allocate(struct iwl3945_priv *priv)
4030 {
4031         struct iwl3945_rx_queue *rxq = &priv->rxq;
4032         struct list_head *element;
4033         struct iwl3945_rx_mem_buffer *rxb;
4034         unsigned long flags;
4035         spin_lock_irqsave(&rxq->lock, flags);
4036         while (!list_empty(&rxq->rx_used)) {
4037                 element = rxq->rx_used.next;
4038                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
4039
4040                 /* Alloc a new receive buffer */
4041                 rxb->skb =
4042                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4043                 if (!rxb->skb) {
4044                         if (net_ratelimit())
4045                                 printk(KERN_CRIT DRV_NAME
4046                                        ": Can not allocate SKB buffers\n");
4047                         /* We don't reschedule replenish work here -- we will
4048                          * call the restock method and if it still needs
4049                          * more buffers it will schedule replenish */
4050                         break;
4051                 }
4052
4053                 /* If radiotap head is required, reserve some headroom here.
4054                  * The physical head count is a variable rx_stats->phy_count.
4055                  * We reserve 4 bytes here. Plus these extra bytes, the
4056                  * headroom of the physical head should be enough for the
4057                  * radiotap head that iwl3945 supported. See iwl3945_rt.
4058                  */
4059                 skb_reserve(rxb->skb, 4);
4060
4061                 priv->alloc_rxb_skb++;
4062                 list_del(element);
4063
4064                 /* Get physical address of RB/SKB */
4065                 rxb->dma_addr =
4066                     pci_map_single(priv->pci_dev, rxb->skb->data,
4067                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4068                 list_add_tail(&rxb->list, &rxq->rx_free);
4069                 rxq->free_count++;
4070         }
4071         spin_unlock_irqrestore(&rxq->lock, flags);
4072 }
4073
4074 /*
4075  * this should be called while priv->lock is locked
4076  */
4077 static void __iwl3945_rx_replenish(void *data)
4078 {
4079         struct iwl3945_priv *priv = data;
4080
4081         iwl3945_rx_allocate(priv);
4082         iwl3945_rx_queue_restock(priv);
4083 }
4084
4085
4086 void iwl3945_rx_replenish(void *data)
4087 {
4088         struct iwl3945_priv *priv = data;
4089         unsigned long flags;
4090
4091         iwl3945_rx_allocate(priv);
4092
4093         spin_lock_irqsave(&priv->lock, flags);
4094         iwl3945_rx_queue_restock(priv);
4095         spin_unlock_irqrestore(&priv->lock, flags);
4096 }
4097
4098 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4099  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
4100  * This free routine walks the list of POOL entries and if SKB is set to
4101  * non NULL it is unmapped and freed
4102  */
4103 static void iwl3945_rx_queue_free(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
4104 {
4105         int i;
4106         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4107                 if (rxq->pool[i].skb != NULL) {
4108                         pci_unmap_single(priv->pci_dev,
4109                                          rxq->pool[i].dma_addr,
4110                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4111                         dev_kfree_skb(rxq->pool[i].skb);
4112                 }
4113         }
4114
4115         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4116                             rxq->dma_addr);
4117         rxq->bd = NULL;
4118 }
4119
4120 int iwl3945_rx_queue_alloc(struct iwl3945_priv *priv)
4121 {
4122         struct iwl3945_rx_queue *rxq = &priv->rxq;
4123         struct pci_dev *dev = priv->pci_dev;
4124         int i;
4125
4126         spin_lock_init(&rxq->lock);
4127         INIT_LIST_HEAD(&rxq->rx_free);
4128         INIT_LIST_HEAD(&rxq->rx_used);
4129
4130         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
4131         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4132         if (!rxq->bd)
4133                 return -ENOMEM;
4134
4135         /* Fill the rx_used queue with _all_ of the Rx buffers */
4136         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4137                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4138
4139         /* Set us so that we have processed and used all buffers, but have
4140          * not restocked the Rx queue with fresh buffers */
4141         rxq->read = rxq->write = 0;
4142         rxq->free_count = 0;
4143         rxq->need_update = 0;
4144         return 0;
4145 }
4146
4147 void iwl3945_rx_queue_reset(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
4148 {
4149         unsigned long flags;
4150         int i;
4151         spin_lock_irqsave(&rxq->lock, flags);
4152         INIT_LIST_HEAD(&rxq->rx_free);
4153         INIT_LIST_HEAD(&rxq->rx_used);
4154         /* Fill the rx_used queue with _all_ of the Rx buffers */
4155         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4156                 /* In the reset function, these buffers may have been allocated
4157                  * to an SKB, so we need to unmap and free potential storage */
4158                 if (rxq->pool[i].skb != NULL) {
4159                         pci_unmap_single(priv->pci_dev,
4160                                          rxq->pool[i].dma_addr,
4161                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4162                         priv->alloc_rxb_skb--;
4163                         dev_kfree_skb(rxq->pool[i].skb);
4164                         rxq->pool[i].skb = NULL;
4165                 }
4166                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4167         }
4168
4169         /* Set us so that we have processed and used all buffers, but have
4170          * not restocked the Rx queue with fresh buffers */
4171         rxq->read = rxq->write = 0;
4172         rxq->free_count = 0;
4173         spin_unlock_irqrestore(&rxq->lock, flags);
4174 }
4175
4176 /* Convert linear signal-to-noise ratio into dB */
4177 static u8 ratio2dB[100] = {
4178 /*       0   1   2   3   4   5   6   7   8   9 */
4179          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4180         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4181         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4182         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4183         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4184         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4185         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4186         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4187         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4188         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4189 };
4190
4191 /* Calculates a relative dB value from a ratio of linear
4192  *   (i.e. not dB) signal levels.
4193  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4194 int iwl3945_calc_db_from_ratio(int sig_ratio)
4195 {
4196         /* Anything above 1000:1 just report as 60 dB */
4197         if (sig_ratio > 1000)
4198                 return 60;
4199
4200         /* Above 100:1, divide by 10 and use table,
4201          *   add 20 dB to make up for divide by 10 */
4202         if (sig_ratio > 100)
4203                 return (20 + (int)ratio2dB[sig_ratio/10]);
4204
4205         /* We shouldn't see this */
4206         if (sig_ratio < 1)
4207                 return 0;
4208
4209         /* Use table for ratios 1:1 - 99:1 */
4210         return (int)ratio2dB[sig_ratio];
4211 }
4212
4213 #define PERFECT_RSSI (-20) /* dBm */
4214 #define WORST_RSSI (-95)   /* dBm */
4215 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4216
4217 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4218  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4219  *   about formulas used below. */
4220 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
4221 {
4222         int sig_qual;
4223         int degradation = PERFECT_RSSI - rssi_dbm;
4224
4225         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4226          * as indicator; formula is (signal dbm - noise dbm).
4227          * SNR at or above 40 is a great signal (100%).
4228          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4229          * Weakest usable signal is usually 10 - 15 dB SNR. */
4230         if (noise_dbm) {
4231                 if (rssi_dbm - noise_dbm >= 40)
4232                         return 100;
4233                 else if (rssi_dbm < noise_dbm)
4234                         return 0;
4235                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4236
4237         /* Else use just the signal level.
4238          * This formula is a least squares fit of data points collected and
4239          *   compared with a reference system that had a percentage (%) display
4240          *   for signal quality. */
4241         } else
4242                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4243                             (15 * RSSI_RANGE + 62 * degradation)) /
4244                            (RSSI_RANGE * RSSI_RANGE);
4245
4246         if (sig_qual > 100)
4247                 sig_qual = 100;
4248         else if (sig_qual < 1)
4249                 sig_qual = 0;
4250
4251         return sig_qual;
4252 }
4253
4254 /**
4255  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
4256  *
4257  * Uses the priv->rx_handlers callback function array to invoke
4258  * the appropriate handlers, including command responses,
4259  * frame-received notifications, and other notifications.
4260  */
4261 static void iwl3945_rx_handle(struct iwl3945_priv *priv)
4262 {
4263         struct iwl3945_rx_mem_buffer *rxb;
4264         struct iwl3945_rx_packet *pkt;
4265         struct iwl3945_rx_queue *rxq = &priv->rxq;
4266         u32 r, i;
4267         int reclaim;
4268         unsigned long flags;
4269         u8 fill_rx = 0;
4270         u32 count = 0;
4271
4272         /* uCode's read index (stored in shared DRAM) indicates the last Rx
4273          * buffer that the driver may process (last buffer filled by ucode). */
4274         r = iwl3945_hw_get_rx_read(priv);
4275         i = rxq->read;
4276
4277         if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
4278                 fill_rx = 1;
4279         /* Rx interrupt, but nothing sent from uCode */
4280         if (i == r)
4281                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4282
4283         while (i != r) {
4284                 rxb = rxq->queue[i];
4285
4286                 /* If an RXB doesn't have a Rx queue slot associated with it,
4287                  * then a bug has been introduced in the queue refilling
4288                  * routines -- catch it here */
4289                 BUG_ON(rxb == NULL);
4290
4291                 rxq->queue[i] = NULL;
4292
4293                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4294                                             IWL_RX_BUF_SIZE,
4295                                             PCI_DMA_FROMDEVICE);
4296                 pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
4297
4298                 /* Reclaim a command buffer only if this packet is a response
4299                  *   to a (driver-originated) command.
4300                  * If the packet (e.g. Rx frame) originated from uCode,
4301                  *   there is no command buffer to reclaim.
4302                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4303                  *   but apparently a few don't get set; catch them here. */
4304                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4305                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4306                         (pkt->hdr.cmd != REPLY_TX);
4307
4308                 /* Based on type of command response or notification,
4309                  *   handle those that need handling via function in
4310                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
4311                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4312                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4313                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4314                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4315                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4316                 } else {
4317                         /* No handling needed */
4318                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4319                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4320                                 r, i, get_cmd_string(pkt->hdr.cmd),
4321                                 pkt->hdr.cmd);
4322                 }
4323
4324                 if (reclaim) {
4325                         /* Invoke any callbacks, transfer the skb to caller, and
4326                          * fire off the (possibly) blocking iwl3945_send_cmd()
4327                          * as we reclaim the driver command queue */
4328                         if (rxb && rxb->skb)
4329                                 iwl3945_tx_cmd_complete(priv, rxb);
4330                         else
4331                                 IWL_WARNING("Claim null rxb?\n");
4332                 }
4333
4334                 /* For now we just don't re-use anything.  We can tweak this
4335                  * later to try and re-use notification packets and SKBs that
4336                  * fail to Rx correctly */
4337                 if (rxb->skb != NULL) {
4338                         priv->alloc_rxb_skb--;
4339                         dev_kfree_skb_any(rxb->skb);
4340                         rxb->skb = NULL;
4341                 }
4342
4343                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4344                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4345                 spin_lock_irqsave(&rxq->lock, flags);
4346                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4347                 spin_unlock_irqrestore(&rxq->lock, flags);
4348                 i = (i + 1) & RX_QUEUE_MASK;
4349                 /* If there are a lot of unused frames,
4350                  * restock the Rx queue so ucode won't assert. */
4351                 if (fill_rx) {
4352                         count++;
4353                         if (count >= 8) {
4354                                 priv->rxq.read = i;
4355                                 __iwl3945_rx_replenish(priv);
4356                                 count = 0;
4357                         }
4358                 }
4359         }
4360
4361         /* Backtrack one entry */
4362         priv->rxq.read = i;
4363         iwl3945_rx_queue_restock(priv);
4364 }
4365
4366 /**
4367  * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
4368  */
4369 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
4370                                   struct iwl3945_tx_queue *txq)
4371 {
4372         u32 reg = 0;
4373         int rc = 0;
4374         int txq_id = txq->q.id;
4375
4376         if (txq->need_update == 0)
4377                 return rc;
4378
4379         /* if we're trying to save power */
4380         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4381                 /* wake up nic if it's powered down ...
4382                  * uCode will wake up, and interrupt us again, so next
4383                  * time we'll skip this part. */
4384                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
4385
4386                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4387                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4388                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
4389                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4390                         return rc;
4391                 }
4392
4393                 /* restore this queue's parameters in nic hardware. */
4394                 rc = iwl3945_grab_nic_access(priv);
4395                 if (rc)
4396                         return rc;
4397                 iwl3945_write_direct32(priv, HBUS_TARG_WRPTR,
4398                                      txq->q.write_ptr | (txq_id << 8));
4399                 iwl3945_release_nic_access(priv);
4400
4401         /* else not in power-save mode, uCode will never sleep when we're
4402          * trying to tx (during RFKILL, we're not trying to tx). */
4403         } else
4404                 iwl3945_write32(priv, HBUS_TARG_WRPTR,
4405                             txq->q.write_ptr | (txq_id << 8));
4406
4407         txq->need_update = 0;
4408
4409         return rc;
4410 }
4411
4412 #ifdef CONFIG_IWL3945_DEBUG
4413 static void iwl3945_print_rx_config_cmd(struct iwl3945_rxon_cmd *rxon)
4414 {
4415         DECLARE_MAC_BUF(mac);
4416
4417         IWL_DEBUG_RADIO("RX CONFIG:\n");
4418         iwl3945_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4419         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4420         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4421         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4422                         le32_to_cpu(rxon->filter_flags));
4423         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4424         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4425                         rxon->ofdm_basic_rates);
4426         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4427         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4428                         print_mac(mac, rxon->node_addr));
4429         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4430                         print_mac(mac, rxon->bssid_addr));
4431         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4432 }
4433 #endif
4434
4435 static void iwl3945_enable_interrupts(struct iwl3945_priv *priv)
4436 {
4437         IWL_DEBUG_ISR("Enabling interrupts\n");
4438         set_bit(STATUS_INT_ENABLED, &priv->status);
4439         iwl3945_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4440 }
4441
4442 static inline void iwl3945_disable_interrupts(struct iwl3945_priv *priv)
4443 {
4444         clear_bit(STATUS_INT_ENABLED, &priv->status);
4445
4446         /* disable interrupts from uCode/NIC to host */
4447         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4448
4449         /* acknowledge/clear/reset any interrupts still pending
4450          * from uCode or flow handler (Rx/Tx DMA) */
4451         iwl3945_write32(priv, CSR_INT, 0xffffffff);
4452         iwl3945_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4453         IWL_DEBUG_ISR("Disabled interrupts\n");
4454 }
4455
4456 static const char *desc_lookup(int i)
4457 {
4458         switch (i) {
4459         case 1:
4460                 return "FAIL";
4461         case 2:
4462                 return "BAD_PARAM";
4463         case 3:
4464                 return "BAD_CHECKSUM";
4465         case 4:
4466                 return "NMI_INTERRUPT";
4467         case 5:
4468                 return "SYSASSERT";
4469         case 6:
4470                 return "FATAL_ERROR";
4471         }
4472
4473         return "UNKNOWN";
4474 }
4475
4476 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4477 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4478
4479 static void iwl3945_dump_nic_error_log(struct iwl3945_priv *priv)
4480 {
4481         u32 i;
4482         u32 desc, time, count, base, data1;
4483         u32 blink1, blink2, ilink1, ilink2;
4484         int rc;
4485
4486         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4487
4488         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4489                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4490                 return;
4491         }
4492
4493         rc = iwl3945_grab_nic_access(priv);
4494         if (rc) {
4495                 IWL_WARNING("Can not read from adapter at this time.\n");
4496                 return;
4497         }
4498
4499         count = iwl3945_read_targ_mem(priv, base);
4500
4501         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4502                 IWL_ERROR("Start IWL Error Log Dump:\n");
4503                 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4504                           priv->status, priv->config, count);
4505         }
4506
4507         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4508                   "ilink1  nmiPC   Line\n");
4509         for (i = ERROR_START_OFFSET;
4510              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4511              i += ERROR_ELEM_SIZE) {
4512                 desc = iwl3945_read_targ_mem(priv, base + i);
4513                 time =
4514                     iwl3945_read_targ_mem(priv, base + i + 1 * sizeof(u32));
4515                 blink1 =
4516                     iwl3945_read_targ_mem(priv, base + i + 2 * sizeof(u32));
4517                 blink2 =
4518                     iwl3945_read_targ_mem(priv, base + i + 3 * sizeof(u32));
4519                 ilink1 =
4520                     iwl3945_read_targ_mem(priv, base + i + 4 * sizeof(u32));
4521                 ilink2 =
4522                     iwl3945_read_targ_mem(priv, base + i + 5 * sizeof(u32));
4523                 data1 =
4524                     iwl3945_read_targ_mem(priv, base + i + 6 * sizeof(u32));
4525
4526                 IWL_ERROR
4527                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4528                      desc_lookup(desc), desc, time, blink1, blink2,
4529                      ilink1, ilink2, data1);
4530         }
4531
4532         iwl3945_release_nic_access(priv);
4533
4534 }
4535
4536 #define EVENT_START_OFFSET  (6 * sizeof(u32))
4537
4538 /**
4539  * iwl3945_print_event_log - Dump error event log to syslog
4540  *
4541  * NOTE: Must be called with iwl3945_grab_nic_access() already obtained!
4542  */
4543 static void iwl3945_print_event_log(struct iwl3945_priv *priv, u32 start_idx,
4544                                 u32 num_events, u32 mode)
4545 {
4546         u32 i;
4547         u32 base;       /* SRAM byte address of event log header */
4548         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4549         u32 ptr;        /* SRAM byte address of log data */
4550         u32 ev, time, data; /* event log data */
4551
4552         if (num_events == 0)
4553                 return;
4554
4555         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4556
4557         if (mode == 0)
4558                 event_size = 2 * sizeof(u32);
4559         else
4560                 event_size = 3 * sizeof(u32);
4561
4562         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4563
4564         /* "time" is actually "data" for mode 0 (no timestamp).
4565          * place event id # at far right for easier visual parsing. */
4566         for (i = 0; i < num_events; i++) {
4567                 ev = iwl3945_read_targ_mem(priv, ptr);
4568                 ptr += sizeof(u32);
4569                 time = iwl3945_read_targ_mem(priv, ptr);
4570                 ptr += sizeof(u32);
4571                 if (mode == 0)
4572                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4573                 else {
4574                         data = iwl3945_read_targ_mem(priv, ptr);
4575                         ptr += sizeof(u32);
4576                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4577                 }
4578         }
4579 }
4580
4581 static void iwl3945_dump_nic_event_log(struct iwl3945_priv *priv)
4582 {
4583         int rc;
4584         u32 base;       /* SRAM byte address of event log header */
4585         u32 capacity;   /* event log capacity in # entries */
4586         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4587         u32 num_wraps;  /* # times uCode wrapped to top of log */
4588         u32 next_entry; /* index of next entry to be written by uCode */
4589         u32 size;       /* # entries that we'll print */
4590
4591         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4592         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4593                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4594                 return;
4595         }
4596
4597         rc = iwl3945_grab_nic_access(priv);
4598         if (rc) {
4599                 IWL_WARNING("Can not read from adapter at this time.\n");
4600                 return;
4601         }
4602
4603         /* event log header */
4604         capacity = iwl3945_read_targ_mem(priv, base);
4605         mode = iwl3945_read_targ_mem(priv, base + (1 * sizeof(u32)));
4606         num_wraps = iwl3945_read_targ_mem(priv, base + (2 * sizeof(u32)));
4607         next_entry = iwl3945_read_targ_mem(priv, base + (3 * sizeof(u32)));
4608
4609         size = num_wraps ? capacity : next_entry;
4610
4611         /* bail out if nothing in log */
4612         if (size == 0) {
4613                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4614                 iwl3945_release_nic_access(priv);
4615                 return;
4616         }
4617
4618         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4619                   size, num_wraps);
4620
4621         /* if uCode has wrapped back to top of log, start at the oldest entry,
4622          * i.e the next one that uCode would fill. */
4623         if (num_wraps)
4624                 iwl3945_print_event_log(priv, next_entry,
4625                                     capacity - next_entry, mode);
4626
4627         /* (then/else) start at top of log */
4628         iwl3945_print_event_log(priv, 0, next_entry, mode);
4629
4630         iwl3945_release_nic_access(priv);
4631 }
4632
4633 /**
4634  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
4635  */
4636 static void iwl3945_irq_handle_error(struct iwl3945_priv *priv)
4637 {
4638         /* Set the FW error flag -- cleared on iwl3945_down */
4639         set_bit(STATUS_FW_ERROR, &priv->status);
4640
4641         /* Cancel currently queued command. */
4642         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4643
4644 #ifdef CONFIG_IWL3945_DEBUG
4645         if (iwl3945_debug_level & IWL_DL_FW_ERRORS) {
4646                 iwl3945_dump_nic_error_log(priv);
4647                 iwl3945_dump_nic_event_log(priv);
4648                 iwl3945_print_rx_config_cmd(&priv->staging_rxon);
4649         }
4650 #endif
4651
4652         wake_up_interruptible(&priv->wait_command_queue);
4653
4654         /* Keep the restart process from trying to send host
4655          * commands by clearing the INIT status bit */
4656         clear_bit(STATUS_READY, &priv->status);
4657
4658         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4659                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4660                           "Restarting adapter due to uCode error.\n");
4661
4662                 if (iwl3945_is_associated(priv)) {
4663                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4664                                sizeof(priv->recovery_rxon));
4665                         priv->error_recovering = 1;
4666                 }
4667                 queue_work(priv->workqueue, &priv->restart);
4668         }
4669 }
4670
4671 static void iwl3945_error_recovery(struct iwl3945_priv *priv)
4672 {
4673         unsigned long flags;
4674
4675         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4676                sizeof(priv->staging_rxon));
4677         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4678         iwl3945_commit_rxon(priv);
4679
4680         iwl3945_add_station(priv, priv->bssid, 1, 0);
4681
4682         spin_lock_irqsave(&priv->lock, flags);
4683         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4684         priv->error_recovering = 0;
4685         spin_unlock_irqrestore(&priv->lock, flags);
4686 }
4687
4688 static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
4689 {
4690         u32 inta, handled = 0;
4691         u32 inta_fh;
4692         unsigned long flags;
4693 #ifdef CONFIG_IWL3945_DEBUG
4694         u32 inta_mask;
4695 #endif
4696
4697         spin_lock_irqsave(&priv->lock, flags);
4698
4699         /* Ack/clear/reset pending uCode interrupts.
4700          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4701          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4702         inta = iwl3945_read32(priv, CSR_INT);
4703         iwl3945_write32(priv, CSR_INT, inta);
4704
4705         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4706          * Any new interrupts that happen after this, either while we're
4707          * in this tasklet, or later, will show up in next ISR/tasklet. */
4708         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4709         iwl3945_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4710
4711 #ifdef CONFIG_IWL3945_DEBUG
4712         if (iwl3945_debug_level & IWL_DL_ISR) {
4713                 /* just for debug */
4714                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4715                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4716                               inta, inta_mask, inta_fh);
4717         }
4718 #endif
4719
4720         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4721          * atomic, make sure that inta covers all the interrupts that
4722          * we've discovered, even if FH interrupt came in just after
4723          * reading CSR_INT. */
4724         if (inta_fh & CSR_FH_INT_RX_MASK)
4725                 inta |= CSR_INT_BIT_FH_RX;
4726         if (inta_fh & CSR_FH_INT_TX_MASK)
4727                 inta |= CSR_INT_BIT_FH_TX;
4728
4729         /* Now service all interrupt bits discovered above. */
4730         if (inta & CSR_INT_BIT_HW_ERR) {
4731                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4732
4733                 /* Tell the device to stop sending interrupts */
4734                 iwl3945_disable_interrupts(priv);
4735
4736                 iwl3945_irq_handle_error(priv);
4737
4738                 handled |= CSR_INT_BIT_HW_ERR;
4739
4740                 spin_unlock_irqrestore(&priv->lock, flags);
4741
4742                 return;
4743         }
4744
4745 #ifdef CONFIG_IWL3945_DEBUG
4746         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4747                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4748                 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
4749                         IWL_DEBUG_ISR("Microcode started or stopped.\n");
4750
4751                 /* Alive notification via Rx interrupt will do the real work */
4752                 if (inta & CSR_INT_BIT_ALIVE)
4753                         IWL_DEBUG_ISR("Alive interrupt\n");
4754         }
4755 #endif
4756         /* Safely ignore these bits for debug checks below */
4757         inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
4758
4759         /* HW RF KILL switch toggled (4965 only) */
4760         if (inta & CSR_INT_BIT_RF_KILL) {
4761                 int hw_rf_kill = 0;
4762                 if (!(iwl3945_read32(priv, CSR_GP_CNTRL) &
4763                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4764                         hw_rf_kill = 1;
4765
4766                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4767                                 "RF_KILL bit toggled to %s.\n",
4768                                 hw_rf_kill ? "disable radio":"enable radio");
4769
4770                 /* Queue restart only if RF_KILL switch was set to "kill"
4771                  *   when we loaded driver, and is now set to "enable".
4772                  * After we're Alive, RF_KILL gets handled by
4773                  *   iwl_rx_card_state_notif() */
4774                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4775                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4776                         queue_work(priv->workqueue, &priv->restart);
4777                 }
4778
4779                 handled |= CSR_INT_BIT_RF_KILL;
4780         }
4781
4782         /* Chip got too hot and stopped itself (4965 only) */
4783         if (inta & CSR_INT_BIT_CT_KILL) {
4784                 IWL_ERROR("Microcode CT kill error detected.\n");
4785                 handled |= CSR_INT_BIT_CT_KILL;
4786         }
4787
4788         /* Error detected by uCode */
4789         if (inta & CSR_INT_BIT_SW_ERR) {
4790                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4791                           inta);
4792                 iwl3945_irq_handle_error(priv);
4793                 handled |= CSR_INT_BIT_SW_ERR;
4794         }
4795
4796         /* uCode wakes up after power-down sleep */
4797         if (inta & CSR_INT_BIT_WAKEUP) {
4798                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4799                 iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
4800                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4801                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4802                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4803                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4804                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4805                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4806
4807                 handled |= CSR_INT_BIT_WAKEUP;
4808         }
4809
4810         /* All uCode command responses, including Tx command responses,
4811          * Rx "responses" (frame-received notification), and other
4812          * notifications from uCode come through here*/
4813         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4814                 iwl3945_rx_handle(priv);
4815                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4816         }
4817
4818         if (inta & CSR_INT_BIT_FH_TX) {
4819                 IWL_DEBUG_ISR("Tx interrupt\n");
4820
4821                 iwl3945_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4822                 if (!iwl3945_grab_nic_access(priv)) {
4823                         iwl3945_write_direct32(priv,
4824                                              FH_TCSR_CREDIT
4825                                              (ALM_FH_SRVC_CHNL), 0x0);
4826                         iwl3945_release_nic_access(priv);
4827                 }
4828                 handled |= CSR_INT_BIT_FH_TX;
4829         }
4830
4831         if (inta & ~handled)
4832                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4833
4834         if (inta & ~CSR_INI_SET_MASK) {
4835                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4836                          inta & ~CSR_INI_SET_MASK);
4837                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4838         }
4839
4840         /* Re-enable all interrupts */
4841         iwl3945_enable_interrupts(priv);
4842
4843 #ifdef CONFIG_IWL3945_DEBUG
4844         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4845                 inta = iwl3945_read32(priv, CSR_INT);
4846                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4847                 inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4848                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4849                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4850         }
4851 #endif
4852         spin_unlock_irqrestore(&priv->lock, flags);
4853 }
4854
4855 static irqreturn_t iwl3945_isr(int irq, void *data)
4856 {
4857         struct iwl3945_priv *priv = data;
4858         u32 inta, inta_mask;
4859         u32 inta_fh;
4860         if (!priv)
4861                 return IRQ_NONE;
4862
4863         spin_lock(&priv->lock);
4864
4865         /* Disable (but don't clear!) interrupts here to avoid
4866          *    back-to-back ISRs and sporadic interrupts from our NIC.
4867          * If we have something to service, the tasklet will re-enable ints.
4868          * If we *don't* have something, we'll re-enable before leaving here. */
4869         inta_mask = iwl3945_read32(priv, CSR_INT_MASK);  /* just for debug */
4870         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4871
4872         /* Discover which interrupts are active/pending */
4873         inta = iwl3945_read32(priv, CSR_INT);
4874         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4875
4876         /* Ignore interrupt if there's nothing in NIC to service.
4877          * This may be due to IRQ shared with another device,
4878          * or due to sporadic interrupts thrown from our NIC. */
4879         if (!inta && !inta_fh) {
4880                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4881                 goto none;
4882         }
4883
4884         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4885                 /* Hardware disappeared */
4886                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4887                 goto unplugged;
4888         }
4889
4890         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4891                       inta, inta_mask, inta_fh);
4892
4893         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4894         tasklet_schedule(&priv->irq_tasklet);
4895 unplugged:
4896         spin_unlock(&priv->lock);
4897
4898         return IRQ_HANDLED;
4899
4900  none:
4901         /* re-enable interrupts here since we don't have anything to service. */
4902         iwl3945_enable_interrupts(priv);
4903         spin_unlock(&priv->lock);
4904         return IRQ_NONE;
4905 }
4906
4907 /************************** EEPROM BANDS ****************************
4908  *
4909  * The iwl3945_eeprom_band definitions below provide the mapping from the
4910  * EEPROM contents to the specific channel number supported for each
4911  * band.
4912  *
4913  * For example, iwl3945_priv->eeprom.band_3_channels[4] from the band_3
4914  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4915  * The specific geography and calibration information for that channel
4916  * is contained in the eeprom map itself.
4917  *
4918  * During init, we copy the eeprom information and channel map
4919  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4920  *
4921  * channel_map_24/52 provides the index in the channel_info array for a
4922  * given channel.  We have to have two separate maps as there is channel
4923  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4924  * band_2
4925  *
4926  * A value of 0xff stored in the channel_map indicates that the channel
4927  * is not supported by the hardware at all.
4928  *
4929  * A value of 0xfe in the channel_map indicates that the channel is not
4930  * valid for Tx with the current hardware.  This means that
4931  * while the system can tune and receive on a given channel, it may not
4932  * be able to associate or transmit any frames on that
4933  * channel.  There is no corresponding channel information for that
4934  * entry.
4935  *
4936  *********************************************************************/
4937
4938 /* 2.4 GHz */
4939 static const u8 iwl3945_eeprom_band_1[14] = {
4940         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4941 };
4942
4943 /* 5.2 GHz bands */
4944 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
4945         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4946 };
4947
4948 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
4949         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4950 };
4951
4952 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
4953         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4954 };
4955
4956 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
4957         145, 149, 153, 157, 161, 165
4958 };
4959
4960 static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int band,
4961                                     int *eeprom_ch_count,
4962                                     const struct iwl3945_eeprom_channel
4963                                     **eeprom_ch_info,
4964                                     const u8 **eeprom_ch_index)
4965 {
4966         switch (band) {
4967         case 1:         /* 2.4GHz band */
4968                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
4969                 *eeprom_ch_info = priv->eeprom.band_1_channels;
4970                 *eeprom_ch_index = iwl3945_eeprom_band_1;
4971                 break;
4972         case 2:         /* 4.9GHz band */
4973                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
4974                 *eeprom_ch_info = priv->eeprom.band_2_channels;
4975                 *eeprom_ch_index = iwl3945_eeprom_band_2;
4976                 break;
4977         case 3:         /* 5.2GHz band */
4978                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
4979                 *eeprom_ch_info = priv->eeprom.band_3_channels;
4980                 *eeprom_ch_index = iwl3945_eeprom_band_3;
4981                 break;
4982         case 4:         /* 5.5GHz band */
4983                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
4984                 *eeprom_ch_info = priv->eeprom.band_4_channels;
4985                 *eeprom_ch_index = iwl3945_eeprom_band_4;
4986                 break;
4987         case 5:         /* 5.7GHz band */
4988                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
4989                 *eeprom_ch_info = priv->eeprom.band_5_channels;
4990                 *eeprom_ch_index = iwl3945_eeprom_band_5;
4991                 break;
4992         default:
4993                 BUG();
4994                 return;
4995         }
4996 }
4997
4998 /**
4999  * iwl3945_get_channel_info - Find driver's private channel info
5000  *
5001  * Based on band and channel number.
5002  */
5003 const struct iwl3945_channel_info *iwl3945_get_channel_info(const struct iwl3945_priv *priv,
5004                                                     int phymode, u16 channel)
5005 {
5006         int i;
5007
5008         switch (phymode) {
5009         case MODE_IEEE80211A:
5010                 for (i = 14; i < priv->channel_count; i++) {
5011                         if (priv->channel_info[i].channel == channel)
5012                                 return &priv->channel_info[i];
5013                 }
5014                 break;
5015
5016         case MODE_IEEE80211B:
5017         case MODE_IEEE80211G:
5018                 if (channel >= 1 && channel <= 14)
5019                         return &priv->channel_info[channel - 1];
5020                 break;
5021
5022         }
5023
5024         return NULL;
5025 }
5026
5027 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5028                             ? # x " " : "")
5029
5030 /**
5031  * iwl3945_init_channel_map - Set up driver's info for all possible channels
5032  */
5033 static int iwl3945_init_channel_map(struct iwl3945_priv *priv)
5034 {
5035         int eeprom_ch_count = 0;
5036         const u8 *eeprom_ch_index = NULL;
5037         const struct iwl3945_eeprom_channel *eeprom_ch_info = NULL;
5038         int band, ch;
5039         struct iwl3945_channel_info *ch_info;
5040
5041         if (priv->channel_count) {
5042                 IWL_DEBUG_INFO("Channel map already initialized.\n");
5043                 return 0;
5044         }
5045
5046         if (priv->eeprom.version < 0x2f) {
5047                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5048                             priv->eeprom.version);
5049                 return -EINVAL;
5050         }
5051
5052         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5053
5054         priv->channel_count =
5055             ARRAY_SIZE(iwl3945_eeprom_band_1) +
5056             ARRAY_SIZE(iwl3945_eeprom_band_2) +
5057             ARRAY_SIZE(iwl3945_eeprom_band_3) +
5058             ARRAY_SIZE(iwl3945_eeprom_band_4) +
5059             ARRAY_SIZE(iwl3945_eeprom_band_5);
5060
5061         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5062
5063         priv->channel_info = kzalloc(sizeof(struct iwl3945_channel_info) *
5064                                      priv->channel_count, GFP_KERNEL);
5065         if (!priv->channel_info) {
5066                 IWL_ERROR("Could not allocate channel_info\n");
5067                 priv->channel_count = 0;
5068                 return -ENOMEM;
5069         }
5070
5071         ch_info = priv->channel_info;
5072
5073         /* Loop through the 5 EEPROM bands adding them in order to the
5074          * channel map we maintain (that contains additional information than
5075          * what just in the EEPROM) */
5076         for (band = 1; band <= 5; band++) {
5077
5078                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
5079                                         &eeprom_ch_info, &eeprom_ch_index);
5080
5081                 /* Loop through each band adding each of the channels */
5082                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5083                         ch_info->channel = eeprom_ch_index[ch];
5084                         ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5085                             MODE_IEEE80211A;
5086
5087                         /* permanently store EEPROM's channel regulatory flags
5088                          *   and max power in channel info database. */
5089                         ch_info->eeprom = eeprom_ch_info[ch];
5090
5091                         /* Copy the run-time flags so they are there even on
5092                          * invalid channels */
5093                         ch_info->flags = eeprom_ch_info[ch].flags;
5094
5095                         if (!(is_channel_valid(ch_info))) {
5096                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5097                                                "No traffic\n",
5098                                                ch_info->channel,
5099                                                ch_info->flags,
5100                                                is_channel_a_band(ch_info) ?
5101                                                "5.2" : "2.4");
5102                                 ch_info++;
5103                                 continue;
5104                         }
5105
5106                         /* Initialize regulatory-based run-time data */
5107                         ch_info->max_power_avg = ch_info->curr_txpow =
5108                             eeprom_ch_info[ch].max_power_avg;
5109                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5110                         ch_info->min_power = 0;
5111
5112                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5113                                        " %ddBm): Ad-Hoc %ssupported\n",
5114                                        ch_info->channel,
5115                                        is_channel_a_band(ch_info) ?
5116                                        "5.2" : "2.4",
5117                                        CHECK_AND_PRINT(IBSS),
5118                                        CHECK_AND_PRINT(ACTIVE),
5119                                        CHECK_AND_PRINT(RADAR),
5120                                        CHECK_AND_PRINT(WIDE),
5121                                        CHECK_AND_PRINT(NARROW),
5122                                        CHECK_AND_PRINT(DFS),
5123                                        eeprom_ch_info[ch].flags,
5124                                        eeprom_ch_info[ch].max_power_avg,
5125                                        ((eeprom_ch_info[ch].
5126                                          flags & EEPROM_CHANNEL_IBSS)
5127                                         && !(eeprom_ch_info[ch].
5128                                              flags & EEPROM_CHANNEL_RADAR))
5129                                        ? "" : "not ");
5130
5131                         /* Set the user_txpower_limit to the highest power
5132                          * supported by any channel */
5133                         if (eeprom_ch_info[ch].max_power_avg >
5134                             priv->user_txpower_limit)
5135                                 priv->user_txpower_limit =
5136                                     eeprom_ch_info[ch].max_power_avg;
5137
5138                         ch_info++;
5139                 }
5140         }
5141
5142         /* Set up txpower settings in driver for all channels */
5143         if (iwl3945_txpower_set_from_eeprom(priv))
5144                 return -EIO;
5145
5146         return 0;
5147 }
5148
5149 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5150  * sending probe req.  This should be set long enough to hear probe responses
5151  * from more than one AP.  */
5152 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5153 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5154
5155 /* For faster active scanning, scan will move to the next channel if fewer than
5156  * PLCP_QUIET_THRESH packets are heard on this channel within
5157  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5158  * time if it's a quiet channel (nothing responded to our probe, and there's
5159  * no other traffic).
5160  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5161 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5162 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5163
5164 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5165  * Must be set longer than active dwell time.
5166  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5167 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5168 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5169 #define IWL_PASSIVE_DWELL_BASE      (100)
5170 #define IWL_CHANNEL_TUNE_TIME       5
5171
5172 static inline u16 iwl3945_get_active_dwell_time(struct iwl3945_priv *priv, int phymode)
5173 {
5174         if (phymode == MODE_IEEE80211A)
5175                 return IWL_ACTIVE_DWELL_TIME_52;
5176         else
5177                 return IWL_ACTIVE_DWELL_TIME_24;
5178 }
5179
5180 static u16 iwl3945_get_passive_dwell_time(struct iwl3945_priv *priv, int phymode)
5181 {
5182         u16 active = iwl3945_get_active_dwell_time(priv, phymode);
5183         u16 passive = (phymode != MODE_IEEE80211A) ?
5184             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5185             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5186
5187         if (iwl3945_is_associated(priv)) {
5188                 /* If we're associated, we clamp the maximum passive
5189                  * dwell time to be 98% of the beacon interval (minus
5190                  * 2 * channel tune time) */
5191                 passive = priv->beacon_int;
5192                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5193                         passive = IWL_PASSIVE_DWELL_BASE;
5194                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5195         }
5196
5197         if (passive <= active)
5198                 passive = active + 1;
5199
5200         return passive;
5201 }
5202
5203 static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv, int phymode,
5204                                      u8 is_active, u8 direct_mask,
5205                                      struct iwl3945_scan_channel *scan_ch)
5206 {
5207         const struct ieee80211_channel *channels = NULL;
5208         const struct ieee80211_hw_mode *hw_mode;
5209         const struct iwl3945_channel_info *ch_info;
5210         u16 passive_dwell = 0;
5211         u16 active_dwell = 0;
5212         int added, i;
5213
5214         hw_mode = iwl3945_get_hw_mode(priv, phymode);
5215         if (!hw_mode)
5216                 return 0;
5217
5218         channels = hw_mode->channels;
5219
5220         active_dwell = iwl3945_get_active_dwell_time(priv, phymode);
5221         passive_dwell = iwl3945_get_passive_dwell_time(priv, phymode);
5222
5223         for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5224                 if (channels[i].chan ==
5225                     le16_to_cpu(priv->active_rxon.channel)) {
5226                         if (iwl3945_is_associated(priv)) {
5227                                 IWL_DEBUG_SCAN
5228                                     ("Skipping current channel %d\n",
5229                                      le16_to_cpu(priv->active_rxon.channel));
5230                                 continue;
5231                         }
5232                 } else if (priv->only_active_channel)
5233                         continue;
5234
5235                 scan_ch->channel = channels[i].chan;
5236
5237                 ch_info = iwl3945_get_channel_info(priv, phymode, scan_ch->channel);
5238                 if (!is_channel_valid(ch_info)) {
5239                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5240                                        scan_ch->channel);
5241                         continue;
5242                 }
5243
5244                 if (!is_active || is_channel_passive(ch_info) ||
5245                     !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5246                         scan_ch->type = 0;      /* passive */
5247                 else
5248                         scan_ch->type = 1;      /* active */
5249
5250                 if (scan_ch->type & 1)
5251                         scan_ch->type |= (direct_mask << 1);
5252
5253                 if (is_channel_narrow(ch_info))
5254                         scan_ch->type |= (1 << 7);
5255
5256                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5257                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5258
5259                 /* Set txpower levels to defaults */
5260                 scan_ch->tpc.dsp_atten = 110;
5261                 /* scan_pwr_info->tpc.dsp_atten; */
5262
5263                 /*scan_pwr_info->tpc.tx_gain; */
5264                 if (phymode == MODE_IEEE80211A)
5265                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5266                 else {
5267                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5268                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5269                          * power level:
5270                          * scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
5271                          */
5272                 }
5273
5274                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5275                                scan_ch->channel,
5276                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5277                                (scan_ch->type & 1) ?
5278                                active_dwell : passive_dwell);
5279
5280                 scan_ch++;
5281                 added++;
5282         }
5283
5284         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5285         return added;
5286 }
5287
5288 static void iwl3945_reset_channel_flag(struct iwl3945_priv *priv)
5289 {
5290         int i, j;
5291         for (i = 0; i < 3; i++) {
5292                 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5293                 for (j = 0; j < hw_mode->num_channels; j++)
5294                         hw_mode->channels[j].flag = hw_mode->channels[j].val;
5295         }
5296 }
5297
5298 static void iwl3945_init_hw_rates(struct iwl3945_priv *priv,
5299                               struct ieee80211_rate *rates)
5300 {
5301         int i;
5302
5303         for (i = 0; i < IWL_RATE_COUNT; i++) {
5304                 rates[i].rate = iwl3945_rates[i].ieee * 5;
5305                 rates[i].val = i; /* Rate scaling will work on indexes */
5306                 rates[i].val2 = i;
5307                 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5308                 /* Only OFDM have the bits-per-symbol set */
5309                 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5310                         rates[i].flags |= IEEE80211_RATE_OFDM;
5311                 else {
5312                         /*
5313                          * If CCK 1M then set rate flag to CCK else CCK_2
5314                          * which is CCK | PREAMBLE2
5315                          */
5316                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
5317                                 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5318                 }
5319
5320                 /* Set up which ones are basic rates... */
5321                 if (IWL_BASIC_RATES_MASK & (1 << i))
5322                         rates[i].flags |= IEEE80211_RATE_BASIC;
5323         }
5324 }
5325
5326 /**
5327  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
5328  */
5329 static int iwl3945_init_geos(struct iwl3945_priv *priv)
5330 {
5331         struct iwl3945_channel_info *ch;
5332         struct ieee80211_hw_mode *modes;
5333         struct ieee80211_channel *channels;
5334         struct ieee80211_channel *geo_ch;
5335         struct ieee80211_rate *rates;
5336         int i = 0;
5337         enum {
5338                 A = 0,
5339                 B = 1,
5340                 G = 2,
5341         };
5342         int mode_count = 3;
5343
5344         if (priv->modes) {
5345                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5346                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5347                 return 0;
5348         }
5349
5350         modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5351                         GFP_KERNEL);
5352         if (!modes)
5353                 return -ENOMEM;
5354
5355         channels = kzalloc(sizeof(struct ieee80211_channel) *
5356                            priv->channel_count, GFP_KERNEL);
5357         if (!channels) {
5358                 kfree(modes);
5359                 return -ENOMEM;
5360         }
5361
5362         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5363                         GFP_KERNEL);
5364         if (!rates) {
5365                 kfree(modes);
5366                 kfree(channels);
5367                 return -ENOMEM;
5368         }
5369
5370         /* 0 = 802.11a
5371          * 1 = 802.11b
5372          * 2 = 802.11g
5373          */
5374
5375         /* 5.2GHz channels start after the 2.4GHz channels */
5376         modes[A].mode = MODE_IEEE80211A;
5377         modes[A].channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
5378         modes[A].rates = &rates[4];
5379         modes[A].num_rates = 8; /* just OFDM */
5380         modes[A].num_channels = 0;
5381
5382         modes[B].mode = MODE_IEEE80211B;
5383         modes[B].channels = channels;
5384         modes[B].rates = rates;
5385         modes[B].num_rates = 4; /* just CCK */
5386         modes[B].num_channels = 0;
5387
5388         modes[G].mode = MODE_IEEE80211G;
5389         modes[G].channels = channels;
5390         modes[G].rates = rates;
5391         modes[G].num_rates = 12;        /* OFDM & CCK */
5392         modes[G].num_channels = 0;
5393
5394         priv->ieee_channels = channels;
5395         priv->ieee_rates = rates;
5396
5397         iwl3945_init_hw_rates(priv, rates);
5398
5399         for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5400                 ch = &priv->channel_info[i];
5401
5402                 if (!is_channel_valid(ch)) {
5403                         IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5404                                     "skipping.\n",
5405                                     ch->channel, is_channel_a_band(ch) ?
5406                                     "5.2" : "2.4");
5407                         continue;
5408                 }
5409
5410                 if (is_channel_a_band(ch))
5411                         geo_ch = &modes[A].channels[modes[A].num_channels++];
5412                 else {
5413                         geo_ch = &modes[B].channels[modes[B].num_channels++];
5414                         modes[G].num_channels++;
5415                 }
5416
5417                 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5418                 geo_ch->chan = ch->channel;
5419                 geo_ch->power_level = ch->max_power_avg;
5420                 geo_ch->antenna_max = 0xff;
5421
5422                 if (is_channel_valid(ch)) {
5423                         geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5424                         if (ch->flags & EEPROM_CHANNEL_IBSS)
5425                                 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5426
5427                         if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5428                                 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5429
5430                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5431                                 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5432
5433                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5434                                 priv->max_channel_txpower_limit =
5435                                     ch->max_power_avg;
5436                 }
5437
5438                 geo_ch->val = geo_ch->flag;
5439         }
5440
5441         if ((modes[A].num_channels == 0) && priv->is_abg) {
5442                 printk(KERN_INFO DRV_NAME
5443                        ": Incorrectly detected BG card as ABG.  Please send "
5444                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5445                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5446                 priv->is_abg = 0;
5447         }
5448
5449         printk(KERN_INFO DRV_NAME
5450                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5451                modes[G].num_channels, modes[A].num_channels);
5452
5453         /*
5454          * NOTE:  We register these in preference of order -- the
5455          * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5456          * a phymode based on rates or AP capabilities but seems to
5457          * configure it purely on if the channel being configured
5458          * is supported by a mode -- and the first match is taken
5459          */
5460
5461         if (modes[G].num_channels)
5462                 ieee80211_register_hwmode(priv->hw, &modes[G]);
5463         if (modes[B].num_channels)
5464                 ieee80211_register_hwmode(priv->hw, &modes[B]);
5465         if (modes[A].num_channels)
5466                 ieee80211_register_hwmode(priv->hw, &modes[A]);
5467
5468         priv->modes = modes;
5469         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5470
5471         return 0;
5472 }
5473
5474 /******************************************************************************
5475  *
5476  * uCode download functions
5477  *
5478  ******************************************************************************/
5479
5480 static void iwl3945_dealloc_ucode_pci(struct iwl3945_priv *priv)
5481 {
5482         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5483         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5484         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5485         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5486         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5487         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5488 }
5489
5490 /**
5491  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
5492  *     looking at all data.
5493  */
5494 static int iwl3945_verify_inst_full(struct iwl3945_priv *priv, __le32 * image, u32 len)
5495 {
5496         u32 val;
5497         u32 save_len = len;
5498         int rc = 0;
5499         u32 errcnt;
5500
5501         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5502
5503         rc = iwl3945_grab_nic_access(priv);
5504         if (rc)
5505                 return rc;
5506
5507         iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5508
5509         errcnt = 0;
5510         for (; len > 0; len -= sizeof(u32), image++) {
5511                 /* read data comes through single port, auto-incr addr */
5512                 /* NOTE: Use the debugless read so we don't flood kernel log
5513                  * if IWL_DL_IO is set */
5514                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5515                 if (val != le32_to_cpu(*image)) {
5516                         IWL_ERROR("uCode INST section is invalid at "
5517                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5518                                   save_len - len, val, le32_to_cpu(*image));
5519                         rc = -EIO;
5520                         errcnt++;
5521                         if (errcnt >= 20)
5522                                 break;
5523                 }
5524         }
5525
5526         iwl3945_release_nic_access(priv);
5527
5528         if (!errcnt)
5529                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
5530
5531         return rc;
5532 }
5533
5534
5535 /**
5536  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
5537  *   using sample data 100 bytes apart.  If these sample points are good,
5538  *   it's a pretty good bet that everything between them is good, too.
5539  */
5540 static int iwl3945_verify_inst_sparse(struct iwl3945_priv *priv, __le32 *image, u32 len)
5541 {
5542         u32 val;
5543         int rc = 0;
5544         u32 errcnt = 0;
5545         u32 i;
5546
5547         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5548
5549         rc = iwl3945_grab_nic_access(priv);
5550         if (rc)
5551                 return rc;
5552
5553         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5554                 /* read data comes through single port, auto-incr addr */
5555                 /* NOTE: Use the debugless read so we don't flood kernel log
5556                  * if IWL_DL_IO is set */
5557                 iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5558                         i + RTC_INST_LOWER_BOUND);
5559                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5560                 if (val != le32_to_cpu(*image)) {
5561 #if 0 /* Enable this if you want to see details */
5562                         IWL_ERROR("uCode INST section is invalid at "
5563                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5564                                   i, val, *image);
5565 #endif
5566                         rc = -EIO;
5567                         errcnt++;
5568                         if (errcnt >= 3)
5569                                 break;
5570                 }
5571         }
5572
5573         iwl3945_release_nic_access(priv);
5574
5575         return rc;
5576 }
5577
5578
5579 /**
5580  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
5581  *    and verify its contents
5582  */
5583 static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
5584 {
5585         __le32 *image;
5586         u32 len;
5587         int rc = 0;
5588
5589         /* Try bootstrap */
5590         image = (__le32 *)priv->ucode_boot.v_addr;
5591         len = priv->ucode_boot.len;
5592         rc = iwl3945_verify_inst_sparse(priv, image, len);
5593         if (rc == 0) {
5594                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5595                 return 0;
5596         }
5597
5598         /* Try initialize */
5599         image = (__le32 *)priv->ucode_init.v_addr;
5600         len = priv->ucode_init.len;
5601         rc = iwl3945_verify_inst_sparse(priv, image, len);
5602         if (rc == 0) {
5603                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5604                 return 0;
5605         }
5606
5607         /* Try runtime/protocol */
5608         image = (__le32 *)priv->ucode_code.v_addr;
5609         len = priv->ucode_code.len;
5610         rc = iwl3945_verify_inst_sparse(priv, image, len);
5611         if (rc == 0) {
5612                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5613                 return 0;
5614         }
5615
5616         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5617
5618         /* Since nothing seems to match, show first several data entries in
5619          * instruction SRAM, so maybe visual inspection will give a clue.
5620          * Selection of bootstrap image (vs. other images) is arbitrary. */
5621         image = (__le32 *)priv->ucode_boot.v_addr;
5622         len = priv->ucode_boot.len;
5623         rc = iwl3945_verify_inst_full(priv, image, len);
5624
5625         return rc;
5626 }
5627
5628
5629 /* check contents of special bootstrap uCode SRAM */
5630 static int iwl3945_verify_bsm(struct iwl3945_priv *priv)
5631 {
5632         __le32 *image = priv->ucode_boot.v_addr;
5633         u32 len = priv->ucode_boot.len;
5634         u32 reg;
5635         u32 val;
5636
5637         IWL_DEBUG_INFO("Begin verify bsm\n");
5638
5639         /* verify BSM SRAM contents */
5640         val = iwl3945_read_prph(priv, BSM_WR_DWCOUNT_REG);
5641         for (reg = BSM_SRAM_LOWER_BOUND;
5642              reg < BSM_SRAM_LOWER_BOUND + len;
5643              reg += sizeof(u32), image ++) {
5644                 val = iwl3945_read_prph(priv, reg);
5645                 if (val != le32_to_cpu(*image)) {
5646                         IWL_ERROR("BSM uCode verification failed at "
5647                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5648                                   BSM_SRAM_LOWER_BOUND,
5649                                   reg - BSM_SRAM_LOWER_BOUND, len,
5650                                   val, le32_to_cpu(*image));
5651                         return -EIO;
5652                 }
5653         }
5654
5655         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5656
5657         return 0;
5658 }
5659
5660 /**
5661  * iwl3945_load_bsm - Load bootstrap instructions
5662  *
5663  * BSM operation:
5664  *
5665  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5666  * in special SRAM that does not power down during RFKILL.  When powering back
5667  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5668  * the bootstrap program into the on-board processor, and starts it.
5669  *
5670  * The bootstrap program loads (via DMA) instructions and data for a new
5671  * program from host DRAM locations indicated by the host driver in the
5672  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5673  * automatically.
5674  *
5675  * When initializing the NIC, the host driver points the BSM to the
5676  * "initialize" uCode image.  This uCode sets up some internal data, then
5677  * notifies host via "initialize alive" that it is complete.
5678  *
5679  * The host then replaces the BSM_DRAM_* pointer values to point to the
5680  * normal runtime uCode instructions and a backup uCode data cache buffer
5681  * (filled initially with starting data values for the on-board processor),
5682  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5683  * which begins normal operation.
5684  *
5685  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5686  * the backup data cache in DRAM before SRAM is powered down.
5687  *
5688  * When powering back up, the BSM loads the bootstrap program.  This reloads
5689  * the runtime uCode instructions and the backup data cache into SRAM,
5690  * and re-launches the runtime uCode from where it left off.
5691  */
5692 static int iwl3945_load_bsm(struct iwl3945_priv *priv)
5693 {
5694         __le32 *image = priv->ucode_boot.v_addr;
5695         u32 len = priv->ucode_boot.len;
5696         dma_addr_t pinst;
5697         dma_addr_t pdata;
5698         u32 inst_len;
5699         u32 data_len;
5700         int rc;
5701         int i;
5702         u32 done;
5703         u32 reg_offset;
5704
5705         IWL_DEBUG_INFO("Begin load bsm\n");
5706
5707         /* make sure bootstrap program is no larger than BSM's SRAM size */
5708         if (len > IWL_MAX_BSM_SIZE)
5709                 return -EINVAL;
5710
5711         /* Tell bootstrap uCode where to find the "Initialize" uCode
5712          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
5713          * NOTE:  iwl3945_initialize_alive_start() will replace these values,
5714          *        after the "initialize" uCode has run, to point to
5715          *        runtime/protocol instructions and backup data cache. */
5716         pinst = priv->ucode_init.p_addr;
5717         pdata = priv->ucode_init_data.p_addr;
5718         inst_len = priv->ucode_init.len;
5719         data_len = priv->ucode_init_data.len;
5720
5721         rc = iwl3945_grab_nic_access(priv);
5722         if (rc)
5723                 return rc;
5724
5725         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5726         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5727         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5728         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5729
5730         /* Fill BSM memory with bootstrap instructions */
5731         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5732              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5733              reg_offset += sizeof(u32), image++)
5734                 _iwl3945_write_prph(priv, reg_offset,
5735                                           le32_to_cpu(*image));
5736
5737         rc = iwl3945_verify_bsm(priv);
5738         if (rc) {
5739                 iwl3945_release_nic_access(priv);
5740                 return rc;
5741         }
5742
5743         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5744         iwl3945_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5745         iwl3945_write_prph(priv, BSM_WR_MEM_DST_REG,
5746                                  RTC_INST_LOWER_BOUND);
5747         iwl3945_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5748
5749         /* Load bootstrap code into instruction SRAM now,
5750          *   to prepare to load "initialize" uCode */
5751         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5752                 BSM_WR_CTRL_REG_BIT_START);
5753
5754         /* Wait for load of bootstrap uCode to finish */
5755         for (i = 0; i < 100; i++) {
5756                 done = iwl3945_read_prph(priv, BSM_WR_CTRL_REG);
5757                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5758                         break;
5759                 udelay(10);
5760         }
5761         if (i < 100)
5762                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5763         else {
5764                 IWL_ERROR("BSM write did not complete!\n");
5765                 return -EIO;
5766         }
5767
5768         /* Enable future boot loads whenever power management unit triggers it
5769          *   (e.g. when powering back up after power-save shutdown) */
5770         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5771                 BSM_WR_CTRL_REG_BIT_START_EN);
5772
5773         iwl3945_release_nic_access(priv);
5774
5775         return 0;
5776 }
5777
5778 static void iwl3945_nic_start(struct iwl3945_priv *priv)
5779 {
5780         /* Remove all resets to allow NIC to operate */
5781         iwl3945_write32(priv, CSR_RESET, 0);
5782 }
5783
5784 /**
5785  * iwl3945_read_ucode - Read uCode images from disk file.
5786  *
5787  * Copy into buffers for card to fetch via bus-mastering
5788  */
5789 static int iwl3945_read_ucode(struct iwl3945_priv *priv)
5790 {
5791         struct iwl3945_ucode *ucode;
5792         int ret = 0;
5793         const struct firmware *ucode_raw;
5794         /* firmware file name contains uCode/driver compatibility version */
5795         const char *name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode";
5796         u8 *src;
5797         size_t len;
5798         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5799
5800         /* Ask kernel firmware_class module to get the boot firmware off disk.
5801          * request_firmware() is synchronous, file is in memory on return. */
5802         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5803         if (ret < 0) {
5804                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5805                                 name, ret);
5806                 goto error;
5807         }
5808
5809         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5810                        name, ucode_raw->size);
5811
5812         /* Make sure that we got at least our header! */
5813         if (ucode_raw->size < sizeof(*ucode)) {
5814                 IWL_ERROR("File size way too small!\n");
5815                 ret = -EINVAL;
5816                 goto err_release;
5817         }
5818
5819         /* Data from ucode file:  header followed by uCode images */
5820         ucode = (void *)ucode_raw->data;
5821
5822         ver = le32_to_cpu(ucode->ver);
5823         inst_size = le32_to_cpu(ucode->inst_size);
5824         data_size = le32_to_cpu(ucode->data_size);
5825         init_size = le32_to_cpu(ucode->init_size);
5826         init_data_size = le32_to_cpu(ucode->init_data_size);
5827         boot_size = le32_to_cpu(ucode->boot_size);
5828
5829         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5830         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
5831         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
5832         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
5833         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
5834         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
5835
5836         /* Verify size of file vs. image size info in file's header */
5837         if (ucode_raw->size < sizeof(*ucode) +
5838                 inst_size + data_size + init_size +
5839                 init_data_size + boot_size) {
5840
5841                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5842                                (int)ucode_raw->size);
5843                 ret = -EINVAL;
5844                 goto err_release;
5845         }
5846
5847         /* Verify that uCode images will fit in card's SRAM */
5848         if (inst_size > IWL_MAX_INST_SIZE) {
5849                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5850                                inst_size);
5851                 ret = -EINVAL;
5852                 goto err_release;
5853         }
5854
5855         if (data_size > IWL_MAX_DATA_SIZE) {
5856                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5857                                data_size);
5858                 ret = -EINVAL;
5859                 goto err_release;
5860         }
5861         if (init_size > IWL_MAX_INST_SIZE) {
5862                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
5863                                 init_size);
5864                 ret = -EINVAL;
5865                 goto err_release;
5866         }
5867         if (init_data_size > IWL_MAX_DATA_SIZE) {
5868                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
5869                                 init_data_size);
5870                 ret = -EINVAL;
5871                 goto err_release;
5872         }
5873         if (boot_size > IWL_MAX_BSM_SIZE) {
5874                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
5875                                 boot_size);
5876                 ret = -EINVAL;
5877                 goto err_release;
5878         }
5879
5880         /* Allocate ucode buffers for card's bus-master loading ... */
5881
5882         /* Runtime instructions and 2 copies of data:
5883          * 1) unmodified from disk
5884          * 2) backup cache for save/restore during power-downs */
5885         priv->ucode_code.len = inst_size;
5886         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5887
5888         priv->ucode_data.len = data_size;
5889         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5890
5891         priv->ucode_data_backup.len = data_size;
5892         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5893
5894         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5895             !priv->ucode_data_backup.v_addr)
5896                 goto err_pci_alloc;
5897
5898         /* Initialization instructions and data */
5899         if (init_size && init_data_size) {
5900                 priv->ucode_init.len = init_size;
5901                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5902
5903                 priv->ucode_init_data.len = init_data_size;
5904                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5905
5906                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5907                         goto err_pci_alloc;
5908         }
5909
5910         /* Bootstrap (instructions only, no data) */
5911         if (boot_size) {
5912                 priv->ucode_boot.len = boot_size;
5913                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5914
5915                 if (!priv->ucode_boot.v_addr)
5916                         goto err_pci_alloc;
5917         }
5918
5919         /* Copy images into buffers for card's bus-master reads ... */
5920
5921         /* Runtime instructions (first block of data in file) */
5922         src = &ucode->data[0];
5923         len = priv->ucode_code.len;
5924         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5925         memcpy(priv->ucode_code.v_addr, src, len);
5926         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5927                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5928
5929         /* Runtime data (2nd block)
5930          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
5931         src = &ucode->data[inst_size];
5932         len = priv->ucode_data.len;
5933         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5934         memcpy(priv->ucode_data.v_addr, src, len);
5935         memcpy(priv->ucode_data_backup.v_addr, src, len);
5936
5937         /* Initialization instructions (3rd block) */
5938         if (init_size) {
5939                 src = &ucode->data[inst_size + data_size];
5940                 len = priv->ucode_init.len;
5941                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5942                                len);
5943                 memcpy(priv->ucode_init.v_addr, src, len);
5944         }
5945
5946         /* Initialization data (4th block) */
5947         if (init_data_size) {
5948                 src = &ucode->data[inst_size + data_size + init_size];
5949                 len = priv->ucode_init_data.len;
5950                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5951                                (int)len);
5952                 memcpy(priv->ucode_init_data.v_addr, src, len);
5953         }
5954
5955         /* Bootstrap instructions (5th block) */
5956         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5957         len = priv->ucode_boot.len;
5958         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5959                        (int)len);
5960         memcpy(priv->ucode_boot.v_addr, src, len);
5961
5962         /* We have our copies now, allow OS release its copies */
5963         release_firmware(ucode_raw);
5964         return 0;
5965
5966  err_pci_alloc:
5967         IWL_ERROR("failed to allocate pci memory\n");
5968         ret = -ENOMEM;
5969         iwl3945_dealloc_ucode_pci(priv);
5970
5971  err_release:
5972         release_firmware(ucode_raw);
5973
5974  error:
5975         return ret;
5976 }
5977
5978
5979 /**
5980  * iwl3945_set_ucode_ptrs - Set uCode address location
5981  *
5982  * Tell initialization uCode where to find runtime uCode.
5983  *
5984  * BSM registers initially contain pointers to initialization uCode.
5985  * We need to replace them to load runtime uCode inst and data,
5986  * and to save runtime data when powering down.
5987  */
5988 static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
5989 {
5990         dma_addr_t pinst;
5991         dma_addr_t pdata;
5992         int rc = 0;
5993         unsigned long flags;
5994
5995         /* bits 31:0 for 3945 */
5996         pinst = priv->ucode_code.p_addr;
5997         pdata = priv->ucode_data_backup.p_addr;
5998
5999         spin_lock_irqsave(&priv->lock, flags);
6000         rc = iwl3945_grab_nic_access(priv);
6001         if (rc) {
6002                 spin_unlock_irqrestore(&priv->lock, flags);
6003                 return rc;
6004         }
6005
6006         /* Tell bootstrap uCode where to find image to load */
6007         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
6008         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6009         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6010                                  priv->ucode_data.len);
6011
6012         /* Inst bytecount must be last to set up, bit 31 signals uCode
6013          *   that all new ptr/size info is in place */
6014         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6015                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6016
6017         iwl3945_release_nic_access(priv);
6018
6019         spin_unlock_irqrestore(&priv->lock, flags);
6020
6021         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6022
6023         return rc;
6024 }
6025
6026 /**
6027  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
6028  *
6029  * Called after REPLY_ALIVE notification received from "initialize" uCode.
6030  *
6031  * Tell "initialize" uCode to go ahead and load the runtime uCode.
6032  */
6033 static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
6034 {
6035         /* Check alive response for "valid" sign from uCode */
6036         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6037                 /* We had an error bringing up the hardware, so take it
6038                  * all the way back down so we can try again */
6039                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6040                 goto restart;
6041         }
6042
6043         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6044          * This is a paranoid check, because we would not have gotten the
6045          * "initialize" alive if code weren't properly loaded.  */
6046         if (iwl3945_verify_ucode(priv)) {
6047                 /* Runtime instruction load was bad;
6048                  * take it all the way back down so we can try again */
6049                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6050                 goto restart;
6051         }
6052
6053         /* Send pointers to protocol/runtime uCode image ... init code will
6054          * load and launch runtime uCode, which will send us another "Alive"
6055          * notification. */
6056         IWL_DEBUG_INFO("Initialization Alive received.\n");
6057         if (iwl3945_set_ucode_ptrs(priv)) {
6058                 /* Runtime instruction load won't happen;
6059                  * take it all the way back down so we can try again */
6060                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6061                 goto restart;
6062         }
6063         return;
6064
6065  restart:
6066         queue_work(priv->workqueue, &priv->restart);
6067 }
6068
6069
6070 /**
6071  * iwl3945_alive_start - called after REPLY_ALIVE notification received
6072  *                   from protocol/runtime uCode (initialization uCode's
6073  *                   Alive gets handled by iwl3945_init_alive_start()).
6074  */
6075 static void iwl3945_alive_start(struct iwl3945_priv *priv)
6076 {
6077         int rc = 0;
6078         int thermal_spin = 0;
6079         u32 rfkill;
6080
6081         IWL_DEBUG_INFO("Runtime Alive received.\n");
6082
6083         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6084                 /* We had an error bringing up the hardware, so take it
6085                  * all the way back down so we can try again */
6086                 IWL_DEBUG_INFO("Alive failed.\n");
6087                 goto restart;
6088         }
6089
6090         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6091          * This is a paranoid check, because we would not have gotten the
6092          * "runtime" alive if code weren't properly loaded.  */
6093         if (iwl3945_verify_ucode(priv)) {
6094                 /* Runtime instruction load was bad;
6095                  * take it all the way back down so we can try again */
6096                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6097                 goto restart;
6098         }
6099
6100         iwl3945_clear_stations_table(priv);
6101
6102         rc = iwl3945_grab_nic_access(priv);
6103         if (rc) {
6104                 IWL_WARNING("Can not read rfkill status from adapter\n");
6105                 return;
6106         }
6107
6108         rfkill = iwl3945_read_prph(priv, APMG_RFKILL_REG);
6109         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
6110         iwl3945_release_nic_access(priv);
6111
6112         if (rfkill & 0x1) {
6113                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6114                 /* if rfkill is not on, then wait for thermal
6115                  * sensor in adapter to kick in */
6116                 while (iwl3945_hw_get_temperature(priv) == 0) {
6117                         thermal_spin++;
6118                         udelay(10);
6119                 }
6120
6121                 if (thermal_spin)
6122                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
6123                                        thermal_spin * 10);
6124         } else
6125                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6126
6127         /* After the ALIVE response, we can send commands to 3945 uCode */
6128         set_bit(STATUS_ALIVE, &priv->status);
6129
6130         /* Clear out the uCode error bit if it is set */
6131         clear_bit(STATUS_FW_ERROR, &priv->status);
6132
6133         rc = iwl3945_init_channel_map(priv);
6134         if (rc) {
6135                 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6136                 return;
6137         }
6138
6139         iwl3945_init_geos(priv);
6140         iwl3945_reset_channel_flag(priv);
6141
6142         if (iwl3945_is_rfkill(priv))
6143                 return;
6144
6145         ieee80211_start_queues(priv->hw);
6146
6147         priv->active_rate = priv->rates_mask;
6148         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6149
6150         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6151
6152         if (iwl3945_is_associated(priv)) {
6153                 struct iwl3945_rxon_cmd *active_rxon =
6154                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
6155
6156                 memcpy(&priv->staging_rxon, &priv->active_rxon,
6157                        sizeof(priv->staging_rxon));
6158                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6159         } else {
6160                 /* Initialize our rx_config data */
6161                 iwl3945_connection_init_rx_config(priv);
6162                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6163         }
6164
6165         /* Configure Bluetooth device coexistence support */
6166         iwl3945_send_bt_config(priv);
6167
6168         /* Configure the adapter for unassociated operation */
6169         iwl3945_commit_rxon(priv);
6170
6171         /* At this point, the NIC is initialized and operational */
6172         priv->notif_missed_beacons = 0;
6173         set_bit(STATUS_READY, &priv->status);
6174
6175         iwl3945_reg_txpower_periodic(priv);
6176
6177         IWL_DEBUG_INFO("ALIVE processing complete.\n");
6178         wake_up_interruptible(&priv->wait_command_queue);
6179
6180         if (priv->error_recovering)
6181                 iwl3945_error_recovery(priv);
6182
6183         return;
6184
6185  restart:
6186         queue_work(priv->workqueue, &priv->restart);
6187 }
6188
6189 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv);
6190
6191 static void __iwl3945_down(struct iwl3945_priv *priv)
6192 {
6193         unsigned long flags;
6194         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6195         struct ieee80211_conf *conf = NULL;
6196
6197         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6198
6199         conf = ieee80211_get_hw_conf(priv->hw);
6200
6201         if (!exit_pending)
6202                 set_bit(STATUS_EXIT_PENDING, &priv->status);
6203
6204         iwl3945_clear_stations_table(priv);
6205
6206         /* Unblock any waiting calls */
6207         wake_up_interruptible_all(&priv->wait_command_queue);
6208
6209         /* Wipe out the EXIT_PENDING status bit if we are not actually
6210          * exiting the module */
6211         if (!exit_pending)
6212                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6213
6214         /* stop and reset the on-board processor */
6215         iwl3945_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6216
6217         /* tell the device to stop sending interrupts */
6218         iwl3945_disable_interrupts(priv);
6219
6220         if (priv->mac80211_registered)
6221                 ieee80211_stop_queues(priv->hw);
6222
6223         /* If we have not previously called iwl3945_init() then
6224          * clear all bits but the RF Kill and SUSPEND bits and return */
6225         if (!iwl3945_is_init(priv)) {
6226                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6227                                         STATUS_RF_KILL_HW |
6228                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6229                                         STATUS_RF_KILL_SW |
6230                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6231                                         STATUS_IN_SUSPEND;
6232                 goto exit;
6233         }
6234
6235         /* ...otherwise clear out all the status bits but the RF Kill and
6236          * SUSPEND bits and continue taking the NIC down. */
6237         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6238                                 STATUS_RF_KILL_HW |
6239                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6240                                 STATUS_RF_KILL_SW |
6241                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6242                                 STATUS_IN_SUSPEND |
6243                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6244                                 STATUS_FW_ERROR;
6245
6246         spin_lock_irqsave(&priv->lock, flags);
6247         iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6248         spin_unlock_irqrestore(&priv->lock, flags);
6249
6250         iwl3945_hw_txq_ctx_stop(priv);
6251         iwl3945_hw_rxq_stop(priv);
6252
6253         spin_lock_irqsave(&priv->lock, flags);
6254         if (!iwl3945_grab_nic_access(priv)) {
6255                 iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
6256                                          APMG_CLK_VAL_DMA_CLK_RQT);
6257                 iwl3945_release_nic_access(priv);
6258         }
6259         spin_unlock_irqrestore(&priv->lock, flags);
6260
6261         udelay(5);
6262
6263         iwl3945_hw_nic_stop_master(priv);
6264         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6265         iwl3945_hw_nic_reset(priv);
6266
6267  exit:
6268         memset(&priv->card_alive, 0, sizeof(struct iwl3945_alive_resp));
6269
6270         if (priv->ibss_beacon)
6271                 dev_kfree_skb(priv->ibss_beacon);
6272         priv->ibss_beacon = NULL;
6273
6274         /* clear out any free frames */
6275         iwl3945_clear_free_frames(priv);
6276 }
6277
6278 static void iwl3945_down(struct iwl3945_priv *priv)
6279 {
6280         mutex_lock(&priv->mutex);
6281         __iwl3945_down(priv);
6282         mutex_unlock(&priv->mutex);
6283
6284         iwl3945_cancel_deferred_work(priv);
6285 }
6286
6287 #define MAX_HW_RESTARTS 5
6288
6289 static int __iwl3945_up(struct iwl3945_priv *priv)
6290 {
6291         int rc, i;
6292
6293         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6294                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6295                 return -EIO;
6296         }
6297
6298         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6299                 IWL_WARNING("Radio disabled by SW RF kill (module "
6300                             "parameter)\n");
6301                 return -ENODEV;
6302         }
6303
6304         /* If platform's RF_KILL switch is NOT set to KILL */
6305         if (iwl3945_read32(priv, CSR_GP_CNTRL) &
6306                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6307                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6308         else {
6309                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6310                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
6311                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6312                         return -ENODEV;
6313                 }
6314         }
6315
6316         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6317                 IWL_ERROR("ucode not available for device bringup\n");
6318                 return -EIO;
6319         }
6320
6321         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6322
6323         rc = iwl3945_hw_nic_init(priv);
6324         if (rc) {
6325                 IWL_ERROR("Unable to int nic\n");
6326                 return rc;
6327         }
6328
6329         /* make sure rfkill handshake bits are cleared */
6330         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6331         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6332                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6333
6334         /* clear (again), then enable host interrupts */
6335         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6336         iwl3945_enable_interrupts(priv);
6337
6338         /* really make sure rfkill handshake bits are cleared */
6339         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6340         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6341
6342         /* Copy original ucode data image from disk into backup cache.
6343          * This will be used to initialize the on-board processor's
6344          * data SRAM for a clean start when the runtime program first loads. */
6345         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6346                priv->ucode_data.len);
6347
6348         /* We return success when we resume from suspend and rf_kill is on. */
6349         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
6350                 return 0;
6351
6352         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6353
6354                 iwl3945_clear_stations_table(priv);
6355
6356                 /* load bootstrap state machine,
6357                  * load bootstrap program into processor's memory,
6358                  * prepare to load the "initialize" uCode */
6359                 rc = iwl3945_load_bsm(priv);
6360
6361                 if (rc) {
6362                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6363                         continue;
6364                 }
6365
6366                 /* start card; "initialize" will load runtime ucode */
6367                 iwl3945_nic_start(priv);
6368
6369                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6370
6371                 return 0;
6372         }
6373
6374         set_bit(STATUS_EXIT_PENDING, &priv->status);
6375         __iwl3945_down(priv);
6376
6377         /* tried to restart and config the device for as long as our
6378          * patience could withstand */
6379         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6380         return -EIO;
6381 }
6382
6383
6384 /*****************************************************************************
6385  *
6386  * Workqueue callbacks
6387  *
6388  *****************************************************************************/
6389
6390 static void iwl3945_bg_init_alive_start(struct work_struct *data)
6391 {
6392         struct iwl3945_priv *priv =
6393             container_of(data, struct iwl3945_priv, init_alive_start.work);
6394
6395         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6396                 return;
6397
6398         mutex_lock(&priv->mutex);
6399         iwl3945_init_alive_start(priv);
6400         mutex_unlock(&priv->mutex);
6401 }
6402
6403 static void iwl3945_bg_alive_start(struct work_struct *data)
6404 {
6405         struct iwl3945_priv *priv =
6406             container_of(data, struct iwl3945_priv, alive_start.work);
6407
6408         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6409                 return;
6410
6411         mutex_lock(&priv->mutex);
6412         iwl3945_alive_start(priv);
6413         mutex_unlock(&priv->mutex);
6414 }
6415
6416 static void iwl3945_bg_rf_kill(struct work_struct *work)
6417 {
6418         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, rf_kill);
6419
6420         wake_up_interruptible(&priv->wait_command_queue);
6421
6422         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6423                 return;
6424
6425         mutex_lock(&priv->mutex);
6426
6427         if (!iwl3945_is_rfkill(priv)) {
6428                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6429                           "HW and/or SW RF Kill no longer active, restarting "
6430                           "device\n");
6431                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6432                         queue_work(priv->workqueue, &priv->restart);
6433         } else {
6434
6435                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6436                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6437                                           "disabled by SW switch\n");
6438                 else
6439                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6440                                     "Kill switch must be turned off for "
6441                                     "wireless networking to work.\n");
6442         }
6443         mutex_unlock(&priv->mutex);
6444 }
6445
6446 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6447
6448 static void iwl3945_bg_scan_check(struct work_struct *data)
6449 {
6450         struct iwl3945_priv *priv =
6451             container_of(data, struct iwl3945_priv, scan_check.work);
6452
6453         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6454                 return;
6455
6456         mutex_lock(&priv->mutex);
6457         if (test_bit(STATUS_SCANNING, &priv->status) ||
6458             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6459                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6460                           "Scan completion watchdog resetting adapter (%dms)\n",
6461                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6462
6463                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6464                         iwl3945_send_scan_abort(priv);
6465         }
6466         mutex_unlock(&priv->mutex);
6467 }
6468
6469 static void iwl3945_bg_request_scan(struct work_struct *data)
6470 {
6471         struct iwl3945_priv *priv =
6472             container_of(data, struct iwl3945_priv, request_scan);
6473         struct iwl3945_host_cmd cmd = {
6474                 .id = REPLY_SCAN_CMD,
6475                 .len = sizeof(struct iwl3945_scan_cmd),
6476                 .meta.flags = CMD_SIZE_HUGE,
6477         };
6478         int rc = 0;
6479         struct iwl3945_scan_cmd *scan;
6480         struct ieee80211_conf *conf = NULL;
6481         u8 direct_mask;
6482         int phymode;
6483
6484         conf = ieee80211_get_hw_conf(priv->hw);
6485
6486         mutex_lock(&priv->mutex);
6487
6488         if (!iwl3945_is_ready(priv)) {
6489                 IWL_WARNING("request scan called when driver not ready.\n");
6490                 goto done;
6491         }
6492
6493         /* Make sure the scan wasn't cancelled before this queued work
6494          * was given the chance to run... */
6495         if (!test_bit(STATUS_SCANNING, &priv->status))
6496                 goto done;
6497
6498         /* This should never be called or scheduled if there is currently
6499          * a scan active in the hardware. */
6500         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6501                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6502                                "Ignoring second request.\n");
6503                 rc = -EIO;
6504                 goto done;
6505         }
6506
6507         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6508                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6509                 goto done;
6510         }
6511
6512         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6513                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6514                 goto done;
6515         }
6516
6517         if (iwl3945_is_rfkill(priv)) {
6518                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6519                 goto done;
6520         }
6521
6522         if (!test_bit(STATUS_READY, &priv->status)) {
6523                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6524                 goto done;
6525         }
6526
6527         if (!priv->scan_bands) {
6528                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6529                 goto done;
6530         }
6531
6532         if (!priv->scan) {
6533                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
6534                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6535                 if (!priv->scan) {
6536                         rc = -ENOMEM;
6537                         goto done;
6538                 }
6539         }
6540         scan = priv->scan;
6541         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
6542
6543         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6544         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6545
6546         if (iwl3945_is_associated(priv)) {
6547                 u16 interval = 0;
6548                 u32 extra;
6549                 u32 suspend_time = 100;
6550                 u32 scan_suspend_time = 100;
6551                 unsigned long flags;
6552
6553                 IWL_DEBUG_INFO("Scanning while associated...\n");
6554
6555                 spin_lock_irqsave(&priv->lock, flags);
6556                 interval = priv->beacon_int;
6557                 spin_unlock_irqrestore(&priv->lock, flags);
6558
6559                 scan->suspend_time = 0;
6560                 scan->max_out_time = cpu_to_le32(200 * 1024);
6561                 if (!interval)
6562                         interval = suspend_time;
6563                 /*
6564                  * suspend time format:
6565                  *  0-19: beacon interval in usec (time before exec.)
6566                  * 20-23: 0
6567                  * 24-31: number of beacons (suspend between channels)
6568                  */
6569
6570                 extra = (suspend_time / interval) << 24;
6571                 scan_suspend_time = 0xFF0FFFFF &
6572                     (extra | ((suspend_time % interval) * 1024));
6573
6574                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6575                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6576                                scan_suspend_time, interval);
6577         }
6578
6579         /* We should add the ability for user to lock to PASSIVE ONLY */
6580         if (priv->one_direct_scan) {
6581                 IWL_DEBUG_SCAN
6582                     ("Kicking off one direct scan for '%s'\n",
6583                      iwl3945_escape_essid(priv->direct_ssid,
6584                                       priv->direct_ssid_len));
6585                 scan->direct_scan[0].id = WLAN_EID_SSID;
6586                 scan->direct_scan[0].len = priv->direct_ssid_len;
6587                 memcpy(scan->direct_scan[0].ssid,
6588                        priv->direct_ssid, priv->direct_ssid_len);
6589                 direct_mask = 1;
6590         } else if (!iwl3945_is_associated(priv) && priv->essid_len) {
6591                 scan->direct_scan[0].id = WLAN_EID_SSID;
6592                 scan->direct_scan[0].len = priv->essid_len;
6593                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6594                 direct_mask = 1;
6595         } else
6596                 direct_mask = 0;
6597
6598         /* We don't build a direct scan probe request; the uCode will do
6599          * that based on the direct_mask added to each channel entry */
6600         scan->tx_cmd.len = cpu_to_le16(
6601                 iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6602                         IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
6603         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6604         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6605         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6606
6607         /* flags + rate selection */
6608
6609         switch (priv->scan_bands) {
6610         case 2:
6611                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6612                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6613                 scan->good_CRC_th = 0;
6614                 phymode = MODE_IEEE80211G;
6615                 break;
6616
6617         case 1:
6618                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6619                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6620                 phymode = MODE_IEEE80211A;
6621                 break;
6622
6623         default:
6624                 IWL_WARNING("Invalid scan band count\n");
6625                 goto done;
6626         }
6627
6628         /* select Rx antennas */
6629         scan->flags |= iwl3945_get_antenna_flags(priv);
6630
6631         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6632                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6633
6634         if (direct_mask)
6635                 IWL_DEBUG_SCAN
6636                     ("Initiating direct scan for %s.\n",
6637                      iwl3945_escape_essid(priv->essid, priv->essid_len));
6638         else
6639                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6640
6641         scan->channel_count =
6642                 iwl3945_get_channels_for_scan(
6643                         priv, phymode, 1, /* active */
6644                         direct_mask,
6645                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6646
6647         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6648             scan->channel_count * sizeof(struct iwl3945_scan_channel);
6649         cmd.data = scan;
6650         scan->len = cpu_to_le16(cmd.len);
6651
6652         set_bit(STATUS_SCAN_HW, &priv->status);
6653         rc = iwl3945_send_cmd_sync(priv, &cmd);
6654         if (rc)
6655                 goto done;
6656
6657         queue_delayed_work(priv->workqueue, &priv->scan_check,
6658                            IWL_SCAN_CHECK_WATCHDOG);
6659
6660         mutex_unlock(&priv->mutex);
6661         return;
6662
6663  done:
6664         /* inform mac80211 scan aborted */
6665         queue_work(priv->workqueue, &priv->scan_completed);
6666         mutex_unlock(&priv->mutex);
6667 }
6668
6669 static void iwl3945_bg_up(struct work_struct *data)
6670 {
6671         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, up);
6672
6673         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6674                 return;
6675
6676         mutex_lock(&priv->mutex);
6677         __iwl3945_up(priv);
6678         mutex_unlock(&priv->mutex);
6679 }
6680
6681 static void iwl3945_bg_restart(struct work_struct *data)
6682 {
6683         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, restart);
6684
6685         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6686                 return;
6687
6688         iwl3945_down(priv);
6689         queue_work(priv->workqueue, &priv->up);
6690 }
6691
6692 static void iwl3945_bg_rx_replenish(struct work_struct *data)
6693 {
6694         struct iwl3945_priv *priv =
6695             container_of(data, struct iwl3945_priv, rx_replenish);
6696
6697         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6698                 return;
6699
6700         mutex_lock(&priv->mutex);
6701         iwl3945_rx_replenish(priv);
6702         mutex_unlock(&priv->mutex);
6703 }
6704
6705 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6706
6707 static void iwl3945_bg_post_associate(struct work_struct *data)
6708 {
6709         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv,
6710                                              post_associate.work);
6711
6712         int rc = 0;
6713         struct ieee80211_conf *conf = NULL;
6714         DECLARE_MAC_BUF(mac);
6715
6716         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6717                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6718                 return;
6719         }
6720
6721
6722         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6723                         priv->assoc_id,
6724                         print_mac(mac, priv->active_rxon.bssid_addr));
6725
6726         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6727                 return;
6728
6729         mutex_lock(&priv->mutex);
6730
6731         if (!priv->vif || !priv->is_open) {
6732                 mutex_unlock(&priv->mutex);
6733                 return;
6734         }
6735         iwl3945_scan_cancel_timeout(priv, 200);
6736
6737         conf = ieee80211_get_hw_conf(priv->hw);
6738
6739         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6740         iwl3945_commit_rxon(priv);
6741
6742         memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6743         iwl3945_setup_rxon_timing(priv);
6744         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6745                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6746         if (rc)
6747                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6748                             "Attempting to continue.\n");
6749
6750         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6751
6752         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6753
6754         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6755                         priv->assoc_id, priv->beacon_int);
6756
6757         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6758                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6759         else
6760                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6761
6762         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6763                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6764                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6765                 else
6766                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6767
6768                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6769                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6770
6771         }
6772
6773         iwl3945_commit_rxon(priv);
6774
6775         switch (priv->iw_mode) {
6776         case IEEE80211_IF_TYPE_STA:
6777                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
6778                 break;
6779
6780         case IEEE80211_IF_TYPE_IBSS:
6781
6782                 /* clear out the station table */
6783                 iwl3945_clear_stations_table(priv);
6784
6785                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6786                 iwl3945_add_station(priv, priv->bssid, 0, 0);
6787                 iwl3945_sync_sta(priv, IWL_STA_ID,
6788                                  (priv->phymode == MODE_IEEE80211A)?
6789                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6790                                  CMD_ASYNC);
6791                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
6792                 iwl3945_send_beacon_cmd(priv);
6793
6794                 break;
6795
6796         default:
6797                  IWL_ERROR("%s Should not be called in %d mode\n",
6798                            __FUNCTION__, priv->iw_mode);
6799                 break;
6800         }
6801
6802         iwl3945_sequence_reset(priv);
6803
6804 #ifdef CONFIG_IWL3945_QOS
6805         iwl3945_activate_qos(priv, 0);
6806 #endif /* CONFIG_IWL3945_QOS */
6807         /* we have just associated, don't start scan too early */
6808         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6809         mutex_unlock(&priv->mutex);
6810 }
6811
6812 static void iwl3945_bg_abort_scan(struct work_struct *work)
6813 {
6814         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, abort_scan);
6815
6816         if (!iwl3945_is_ready(priv))
6817                 return;
6818
6819         mutex_lock(&priv->mutex);
6820
6821         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6822         iwl3945_send_scan_abort(priv);
6823
6824         mutex_unlock(&priv->mutex);
6825 }
6826
6827 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6828
6829 static void iwl3945_bg_scan_completed(struct work_struct *work)
6830 {
6831         struct iwl3945_priv *priv =
6832             container_of(work, struct iwl3945_priv, scan_completed);
6833
6834         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6835
6836         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6837                 return;
6838
6839         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6840                 iwl3945_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6841
6842         ieee80211_scan_completed(priv->hw);
6843
6844         /* Since setting the TXPOWER may have been deferred while
6845          * performing the scan, fire one off */
6846         mutex_lock(&priv->mutex);
6847         iwl3945_hw_reg_send_txpower(priv);
6848         mutex_unlock(&priv->mutex);
6849 }
6850
6851 /*****************************************************************************
6852  *
6853  * mac80211 entry point functions
6854  *
6855  *****************************************************************************/
6856
6857 #define UCODE_READY_TIMEOUT     (2 * HZ)
6858
6859 static int iwl3945_mac_start(struct ieee80211_hw *hw)
6860 {
6861         struct iwl3945_priv *priv = hw->priv;
6862         int ret;
6863
6864         IWL_DEBUG_MAC80211("enter\n");
6865
6866         if (pci_enable_device(priv->pci_dev)) {
6867                 IWL_ERROR("Fail to pci_enable_device\n");
6868                 return -ENODEV;
6869         }
6870         pci_restore_state(priv->pci_dev);
6871         pci_enable_msi(priv->pci_dev);
6872
6873         ret = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
6874                           DRV_NAME, priv);
6875         if (ret) {
6876                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6877                 goto out_disable_msi;
6878         }
6879
6880         /* we should be verifying the device is ready to be opened */
6881         mutex_lock(&priv->mutex);
6882
6883         memset(&priv->staging_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
6884         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6885          * ucode filename and max sizes are card-specific. */
6886
6887         if (!priv->ucode_code.len) {
6888                 ret = iwl3945_read_ucode(priv);
6889                 if (ret) {
6890                         IWL_ERROR("Could not read microcode: %d\n", ret);
6891                         mutex_unlock(&priv->mutex);
6892                         goto out_release_irq;
6893                 }
6894         }
6895
6896         ret = __iwl3945_up(priv);
6897
6898         mutex_unlock(&priv->mutex);
6899
6900         if (ret)
6901                 goto out_release_irq;
6902
6903         IWL_DEBUG_INFO("Start UP work.\n");
6904
6905         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6906                 return 0;
6907
6908         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6909          * mac80211 will not be run successfully. */
6910         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6911                         test_bit(STATUS_READY, &priv->status),
6912                         UCODE_READY_TIMEOUT);
6913         if (!ret) {
6914                 if (!test_bit(STATUS_READY, &priv->status)) {
6915                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6916                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6917                         ret = -ETIMEDOUT;
6918                         goto out_release_irq;
6919                 }
6920         }
6921
6922         priv->is_open = 1;
6923         IWL_DEBUG_MAC80211("leave\n");
6924         return 0;
6925
6926 out_release_irq:
6927         free_irq(priv->pci_dev->irq, priv);
6928 out_disable_msi:
6929         pci_disable_msi(priv->pci_dev);
6930         pci_disable_device(priv->pci_dev);
6931         priv->is_open = 0;
6932         IWL_DEBUG_MAC80211("leave - failed\n");
6933         return ret;
6934 }
6935
6936 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
6937 {
6938         struct iwl3945_priv *priv = hw->priv;
6939
6940         IWL_DEBUG_MAC80211("enter\n");
6941
6942         if (!priv->is_open) {
6943                 IWL_DEBUG_MAC80211("leave - skip\n");
6944                 return;
6945         }
6946
6947         priv->is_open = 0;
6948
6949         if (iwl3945_is_ready_rf(priv)) {
6950                 /* stop mac, cancel any scan request and clear
6951                  * RXON_FILTER_ASSOC_MSK BIT
6952                  */
6953                 mutex_lock(&priv->mutex);
6954                 iwl3945_scan_cancel_timeout(priv, 100);
6955                 cancel_delayed_work(&priv->post_associate);
6956                 mutex_unlock(&priv->mutex);
6957         }
6958
6959         iwl3945_down(priv);
6960
6961         flush_workqueue(priv->workqueue);
6962         free_irq(priv->pci_dev->irq, priv);
6963         pci_disable_msi(priv->pci_dev);
6964         pci_save_state(priv->pci_dev);
6965         pci_disable_device(priv->pci_dev);
6966
6967         IWL_DEBUG_MAC80211("leave\n");
6968 }
6969
6970 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6971                       struct ieee80211_tx_control *ctl)
6972 {
6973         struct iwl3945_priv *priv = hw->priv;
6974
6975         IWL_DEBUG_MAC80211("enter\n");
6976
6977         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6978                 IWL_DEBUG_MAC80211("leave - monitor\n");
6979                 return -1;
6980         }
6981
6982         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6983                      ctl->tx_rate);
6984
6985         if (iwl3945_tx_skb(priv, skb, ctl))
6986                 dev_kfree_skb_any(skb);
6987
6988         IWL_DEBUG_MAC80211("leave\n");
6989         return 0;
6990 }
6991
6992 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
6993                                  struct ieee80211_if_init_conf *conf)
6994 {
6995         struct iwl3945_priv *priv = hw->priv;
6996         unsigned long flags;
6997         DECLARE_MAC_BUF(mac);
6998
6999         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
7000
7001         if (priv->vif) {
7002                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
7003                 return -EOPNOTSUPP;
7004         }
7005
7006         spin_lock_irqsave(&priv->lock, flags);
7007         priv->vif = conf->vif;
7008
7009         spin_unlock_irqrestore(&priv->lock, flags);
7010
7011         mutex_lock(&priv->mutex);
7012
7013         if (conf->mac_addr) {
7014                 IWL_DEBUG_MAC80211("Set: %s\n", print_mac(mac, conf->mac_addr));
7015                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
7016         }
7017
7018         if (iwl3945_is_ready(priv))
7019                 iwl3945_set_mode(priv, conf->type);
7020
7021         mutex_unlock(&priv->mutex);
7022
7023         IWL_DEBUG_MAC80211("leave\n");
7024         return 0;
7025 }
7026
7027 /**
7028  * iwl3945_mac_config - mac80211 config callback
7029  *
7030  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7031  * be set inappropriately and the driver currently sets the hardware up to
7032  * use it whenever needed.
7033  */
7034 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7035 {
7036         struct iwl3945_priv *priv = hw->priv;
7037         const struct iwl3945_channel_info *ch_info;
7038         unsigned long flags;
7039         int ret = 0;
7040
7041         mutex_lock(&priv->mutex);
7042         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
7043
7044         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
7045
7046         if (!iwl3945_is_ready(priv)) {
7047                 IWL_DEBUG_MAC80211("leave - not ready\n");
7048                 ret = -EIO;
7049                 goto out;
7050         }
7051
7052         if (unlikely(!iwl3945_param_disable_hw_scan &&
7053                      test_bit(STATUS_SCANNING, &priv->status))) {
7054                 IWL_DEBUG_MAC80211("leave - scanning\n");
7055                 set_bit(STATUS_CONF_PENDING, &priv->status);
7056                 mutex_unlock(&priv->mutex);
7057                 return 0;
7058         }
7059
7060         spin_lock_irqsave(&priv->lock, flags);
7061
7062         ch_info = iwl3945_get_channel_info(priv, conf->phymode, conf->channel);
7063         if (!is_channel_valid(ch_info)) {
7064                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
7065                                conf->channel, conf->phymode);
7066                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7067                 spin_unlock_irqrestore(&priv->lock, flags);
7068                 ret = -EINVAL;
7069                 goto out;
7070         }
7071
7072         iwl3945_set_rxon_channel(priv, conf->phymode, conf->channel);
7073
7074         iwl3945_set_flags_for_phymode(priv, conf->phymode);
7075
7076         /* The list of supported rates and rate mask can be different
7077          * for each phymode; since the phymode may have changed, reset
7078          * the rate mask to what mac80211 lists */
7079         iwl3945_set_rate(priv);
7080
7081         spin_unlock_irqrestore(&priv->lock, flags);
7082
7083 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7084         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7085                 iwl3945_hw_channel_switch(priv, conf->channel);
7086                 goto out;
7087         }
7088 #endif
7089
7090         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
7091
7092         if (!conf->radio_enabled) {
7093                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7094                 goto out;
7095         }
7096
7097         if (iwl3945_is_rfkill(priv)) {
7098                 IWL_DEBUG_MAC80211("leave - RF kill\n");
7099                 ret = -EIO;
7100                 goto out;
7101         }
7102
7103         iwl3945_set_rate(priv);
7104
7105         if (memcmp(&priv->active_rxon,
7106                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
7107                 iwl3945_commit_rxon(priv);
7108         else
7109                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7110
7111         IWL_DEBUG_MAC80211("leave\n");
7112
7113 out:
7114         clear_bit(STATUS_CONF_PENDING, &priv->status);
7115         mutex_unlock(&priv->mutex);
7116         return ret;
7117 }
7118
7119 static void iwl3945_config_ap(struct iwl3945_priv *priv)
7120 {
7121         int rc = 0;
7122
7123         if (priv->status & STATUS_EXIT_PENDING)
7124                 return;
7125
7126         /* The following should be done only at AP bring up */
7127         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7128
7129                 /* RXON - unassoc (to set timing command) */
7130                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7131                 iwl3945_commit_rxon(priv);
7132
7133                 /* RXON Timing */
7134                 memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
7135                 iwl3945_setup_rxon_timing(priv);
7136                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7137                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
7138                 if (rc)
7139                         IWL_WARNING("REPLY_RXON_TIMING failed - "
7140                                         "Attempting to continue.\n");
7141
7142                 /* FIXME: what should be the assoc_id for AP? */
7143                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7144                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7145                         priv->staging_rxon.flags |=
7146                                 RXON_FLG_SHORT_PREAMBLE_MSK;
7147                 else
7148                         priv->staging_rxon.flags &=
7149                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7150
7151                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7152                         if (priv->assoc_capability &
7153                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7154                                 priv->staging_rxon.flags |=
7155                                         RXON_FLG_SHORT_SLOT_MSK;
7156                         else
7157                                 priv->staging_rxon.flags &=
7158                                         ~RXON_FLG_SHORT_SLOT_MSK;
7159
7160                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7161                                 priv->staging_rxon.flags &=
7162                                         ~RXON_FLG_SHORT_SLOT_MSK;
7163                 }
7164                 /* restore RXON assoc */
7165                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7166                 iwl3945_commit_rxon(priv);
7167                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
7168         }
7169         iwl3945_send_beacon_cmd(priv);
7170
7171         /* FIXME - we need to add code here to detect a totally new
7172          * configuration, reset the AP, unassoc, rxon timing, assoc,
7173          * clear sta table, add BCAST sta... */
7174 }
7175
7176 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
7177                                         struct ieee80211_vif *vif,
7178                                     struct ieee80211_if_conf *conf)
7179 {
7180         struct iwl3945_priv *priv = hw->priv;
7181         DECLARE_MAC_BUF(mac);
7182         unsigned long flags;
7183         int rc;
7184
7185         if (conf == NULL)
7186                 return -EIO;
7187
7188         /* XXX: this MUST use conf->mac_addr */
7189
7190         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7191             (!conf->beacon || !conf->ssid_len)) {
7192                 IWL_DEBUG_MAC80211
7193                     ("Leaving in AP mode because HostAPD is not ready.\n");
7194                 return 0;
7195         }
7196
7197         if (!iwl3945_is_alive(priv))
7198                 return -EAGAIN;
7199
7200         mutex_lock(&priv->mutex);
7201
7202         if (conf->bssid)
7203                 IWL_DEBUG_MAC80211("bssid: %s\n",
7204                                    print_mac(mac, conf->bssid));
7205
7206 /*
7207  * very dubious code was here; the probe filtering flag is never set:
7208  *
7209         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7210             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7211  */
7212         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7213                 IWL_DEBUG_MAC80211("leave - scanning\n");
7214                 mutex_unlock(&priv->mutex);
7215                 return 0;
7216         }
7217
7218         if (priv->vif != vif) {
7219                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
7220                 mutex_unlock(&priv->mutex);
7221                 return 0;
7222         }
7223
7224         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7225                 if (!conf->bssid) {
7226                         conf->bssid = priv->mac_addr;
7227                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7228                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7229                                            print_mac(mac, conf->bssid));
7230                 }
7231                 if (priv->ibss_beacon)
7232                         dev_kfree_skb(priv->ibss_beacon);
7233
7234                 priv->ibss_beacon = conf->beacon;
7235         }
7236
7237         if (iwl3945_is_rfkill(priv))
7238                 goto done;
7239
7240         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7241             !is_multicast_ether_addr(conf->bssid)) {
7242                 /* If there is currently a HW scan going on in the background
7243                  * then we need to cancel it else the RXON below will fail. */
7244                 if (iwl3945_scan_cancel_timeout(priv, 100)) {
7245                         IWL_WARNING("Aborted scan still in progress "
7246                                     "after 100ms\n");
7247                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7248                         mutex_unlock(&priv->mutex);
7249                         return -EAGAIN;
7250                 }
7251                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7252
7253                 /* TODO: Audit driver for usage of these members and see
7254                  * if mac80211 deprecates them (priv->bssid looks like it
7255                  * shouldn't be there, but I haven't scanned the IBSS code
7256                  * to verify) - jpk */
7257                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7258
7259                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7260                         iwl3945_config_ap(priv);
7261                 else {
7262                         rc = iwl3945_commit_rxon(priv);
7263                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7264                                 iwl3945_add_station(priv,
7265                                         priv->active_rxon.bssid_addr, 1, 0);
7266                 }
7267
7268         } else {
7269                 iwl3945_scan_cancel_timeout(priv, 100);
7270                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7271                 iwl3945_commit_rxon(priv);
7272         }
7273
7274  done:
7275         spin_lock_irqsave(&priv->lock, flags);
7276         if (!conf->ssid_len)
7277                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7278         else
7279                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7280
7281         priv->essid_len = conf->ssid_len;
7282         spin_unlock_irqrestore(&priv->lock, flags);
7283
7284         IWL_DEBUG_MAC80211("leave\n");
7285         mutex_unlock(&priv->mutex);
7286
7287         return 0;
7288 }
7289
7290 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
7291                                  unsigned int changed_flags,
7292                                  unsigned int *total_flags,
7293                                  int mc_count, struct dev_addr_list *mc_list)
7294 {
7295         /*
7296          * XXX: dummy
7297          * see also iwl3945_connection_init_rx_config
7298          */
7299         *total_flags = 0;
7300 }
7301
7302 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
7303                                      struct ieee80211_if_init_conf *conf)
7304 {
7305         struct iwl3945_priv *priv = hw->priv;
7306
7307         IWL_DEBUG_MAC80211("enter\n");
7308
7309         mutex_lock(&priv->mutex);
7310
7311         if (iwl3945_is_ready_rf(priv)) {
7312                 iwl3945_scan_cancel_timeout(priv, 100);
7313                 cancel_delayed_work(&priv->post_associate);
7314                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7315                 iwl3945_commit_rxon(priv);
7316         }
7317         if (priv->vif == conf->vif) {
7318                 priv->vif = NULL;
7319                 memset(priv->bssid, 0, ETH_ALEN);
7320                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7321                 priv->essid_len = 0;
7322         }
7323         mutex_unlock(&priv->mutex);
7324
7325         IWL_DEBUG_MAC80211("leave\n");
7326 }
7327
7328 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7329 {
7330         int rc = 0;
7331         unsigned long flags;
7332         struct iwl3945_priv *priv = hw->priv;
7333
7334         IWL_DEBUG_MAC80211("enter\n");
7335
7336         mutex_lock(&priv->mutex);
7337         spin_lock_irqsave(&priv->lock, flags);
7338
7339         if (!iwl3945_is_ready_rf(priv)) {
7340                 rc = -EIO;
7341                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7342                 goto out_unlock;
7343         }
7344
7345         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7346                 rc = -EIO;
7347                 IWL_ERROR("ERROR: APs don't scan\n");
7348                 goto out_unlock;
7349         }
7350
7351         /* we don't schedule scan within next_scan_jiffies period */
7352         if (priv->next_scan_jiffies &&
7353                         time_after(priv->next_scan_jiffies, jiffies)) {
7354                 rc = -EAGAIN;
7355                 goto out_unlock;
7356         }
7357         /* if we just finished scan ask for delay */
7358         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
7359                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
7360                 rc = -EAGAIN;
7361                 goto out_unlock;
7362         }
7363         if (len) {
7364                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7365                                iwl3945_escape_essid(ssid, len), (int)len);
7366
7367                 priv->one_direct_scan = 1;
7368                 priv->direct_ssid_len = (u8)
7369                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7370                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7371         } else
7372                 priv->one_direct_scan = 0;
7373
7374         rc = iwl3945_scan_initiate(priv);
7375
7376         IWL_DEBUG_MAC80211("leave\n");
7377
7378 out_unlock:
7379         spin_unlock_irqrestore(&priv->lock, flags);
7380         mutex_unlock(&priv->mutex);
7381
7382         return rc;
7383 }
7384
7385 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7386                            const u8 *local_addr, const u8 *addr,
7387                            struct ieee80211_key_conf *key)
7388 {
7389         struct iwl3945_priv *priv = hw->priv;
7390         int rc = 0;
7391         u8 sta_id;
7392
7393         IWL_DEBUG_MAC80211("enter\n");
7394
7395         if (!iwl3945_param_hwcrypto) {
7396                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7397                 return -EOPNOTSUPP;
7398         }
7399
7400         if (is_zero_ether_addr(addr))
7401                 /* only support pairwise keys */
7402                 return -EOPNOTSUPP;
7403
7404         sta_id = iwl3945_hw_find_station(priv, addr);
7405         if (sta_id == IWL_INVALID_STATION) {
7406                 DECLARE_MAC_BUF(mac);
7407
7408                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7409                                    print_mac(mac, addr));
7410                 return -EINVAL;
7411         }
7412
7413         mutex_lock(&priv->mutex);
7414
7415         iwl3945_scan_cancel_timeout(priv, 100);
7416
7417         switch (cmd) {
7418         case  SET_KEY:
7419                 rc = iwl3945_update_sta_key_info(priv, key, sta_id);
7420                 if (!rc) {
7421                         iwl3945_set_rxon_hwcrypto(priv, 1);
7422                         iwl3945_commit_rxon(priv);
7423                         key->hw_key_idx = sta_id;
7424                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7425                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7426                 }
7427                 break;
7428         case DISABLE_KEY:
7429                 rc = iwl3945_clear_sta_key_info(priv, sta_id);
7430                 if (!rc) {
7431                         iwl3945_set_rxon_hwcrypto(priv, 0);
7432                         iwl3945_commit_rxon(priv);
7433                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7434                 }
7435                 break;
7436         default:
7437                 rc = -EINVAL;
7438         }
7439
7440         IWL_DEBUG_MAC80211("leave\n");
7441         mutex_unlock(&priv->mutex);
7442
7443         return rc;
7444 }
7445
7446 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7447                            const struct ieee80211_tx_queue_params *params)
7448 {
7449         struct iwl3945_priv *priv = hw->priv;
7450 #ifdef CONFIG_IWL3945_QOS
7451         unsigned long flags;
7452         int q;
7453 #endif /* CONFIG_IWL3945_QOS */
7454
7455         IWL_DEBUG_MAC80211("enter\n");
7456
7457         if (!iwl3945_is_ready_rf(priv)) {
7458                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7459                 return -EIO;
7460         }
7461
7462         if (queue >= AC_NUM) {
7463                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7464                 return 0;
7465         }
7466
7467 #ifdef CONFIG_IWL3945_QOS
7468         if (!priv->qos_data.qos_enable) {
7469                 priv->qos_data.qos_active = 0;
7470                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7471                 return 0;
7472         }
7473         q = AC_NUM - 1 - queue;
7474
7475         spin_lock_irqsave(&priv->lock, flags);
7476
7477         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7478         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7479         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7480         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7481                         cpu_to_le16((params->burst_time * 100));
7482
7483         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7484         priv->qos_data.qos_active = 1;
7485
7486         spin_unlock_irqrestore(&priv->lock, flags);
7487
7488         mutex_lock(&priv->mutex);
7489         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7490                 iwl3945_activate_qos(priv, 1);
7491         else if (priv->assoc_id && iwl3945_is_associated(priv))
7492                 iwl3945_activate_qos(priv, 0);
7493
7494         mutex_unlock(&priv->mutex);
7495
7496 #endif /*CONFIG_IWL3945_QOS */
7497
7498         IWL_DEBUG_MAC80211("leave\n");
7499         return 0;
7500 }
7501
7502 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
7503                                 struct ieee80211_tx_queue_stats *stats)
7504 {
7505         struct iwl3945_priv *priv = hw->priv;
7506         int i, avail;
7507         struct iwl3945_tx_queue *txq;
7508         struct iwl3945_queue *q;
7509         unsigned long flags;
7510
7511         IWL_DEBUG_MAC80211("enter\n");
7512
7513         if (!iwl3945_is_ready_rf(priv)) {
7514                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7515                 return -EIO;
7516         }
7517
7518         spin_lock_irqsave(&priv->lock, flags);
7519
7520         for (i = 0; i < AC_NUM; i++) {
7521                 txq = &priv->txq[i];
7522                 q = &txq->q;
7523                 avail = iwl3945_queue_space(q);
7524
7525                 stats->data[i].len = q->n_window - avail;
7526                 stats->data[i].limit = q->n_window - q->high_mark;
7527                 stats->data[i].count = q->n_window;
7528
7529         }
7530         spin_unlock_irqrestore(&priv->lock, flags);
7531
7532         IWL_DEBUG_MAC80211("leave\n");
7533
7534         return 0;
7535 }
7536
7537 static int iwl3945_mac_get_stats(struct ieee80211_hw *hw,
7538                              struct ieee80211_low_level_stats *stats)
7539 {
7540         IWL_DEBUG_MAC80211("enter\n");
7541         IWL_DEBUG_MAC80211("leave\n");
7542
7543         return 0;
7544 }
7545
7546 static u64 iwl3945_mac_get_tsf(struct ieee80211_hw *hw)
7547 {
7548         IWL_DEBUG_MAC80211("enter\n");
7549         IWL_DEBUG_MAC80211("leave\n");
7550
7551         return 0;
7552 }
7553
7554 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
7555 {
7556         struct iwl3945_priv *priv = hw->priv;
7557         unsigned long flags;
7558
7559         mutex_lock(&priv->mutex);
7560         IWL_DEBUG_MAC80211("enter\n");
7561
7562 #ifdef CONFIG_IWL3945_QOS
7563         iwl3945_reset_qos(priv);
7564 #endif
7565         cancel_delayed_work(&priv->post_associate);
7566
7567         spin_lock_irqsave(&priv->lock, flags);
7568         priv->assoc_id = 0;
7569         priv->assoc_capability = 0;
7570         priv->call_post_assoc_from_beacon = 0;
7571
7572         /* new association get rid of ibss beacon skb */
7573         if (priv->ibss_beacon)
7574                 dev_kfree_skb(priv->ibss_beacon);
7575
7576         priv->ibss_beacon = NULL;
7577
7578         priv->beacon_int = priv->hw->conf.beacon_int;
7579         priv->timestamp1 = 0;
7580         priv->timestamp0 = 0;
7581         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7582                 priv->beacon_int = 0;
7583
7584         spin_unlock_irqrestore(&priv->lock, flags);
7585
7586         if (!iwl3945_is_ready_rf(priv)) {
7587                 IWL_DEBUG_MAC80211("leave - not ready\n");
7588                 mutex_unlock(&priv->mutex);
7589                 return;
7590         }
7591
7592         /* we are restarting association process
7593          * clear RXON_FILTER_ASSOC_MSK bit
7594         */
7595         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7596                 iwl3945_scan_cancel_timeout(priv, 100);
7597                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7598                 iwl3945_commit_rxon(priv);
7599         }
7600
7601         /* Per mac80211.h: This is only used in IBSS mode... */
7602         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7603
7604                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7605                 mutex_unlock(&priv->mutex);
7606                 return;
7607         }
7608
7609         priv->only_active_channel = 0;
7610
7611         iwl3945_set_rate(priv);
7612
7613         mutex_unlock(&priv->mutex);
7614
7615         IWL_DEBUG_MAC80211("leave\n");
7616
7617 }
7618
7619 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7620                                  struct ieee80211_tx_control *control)
7621 {
7622         struct iwl3945_priv *priv = hw->priv;
7623         unsigned long flags;
7624
7625         mutex_lock(&priv->mutex);
7626         IWL_DEBUG_MAC80211("enter\n");
7627
7628         if (!iwl3945_is_ready_rf(priv)) {
7629                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7630                 mutex_unlock(&priv->mutex);
7631                 return -EIO;
7632         }
7633
7634         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7635                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7636                 mutex_unlock(&priv->mutex);
7637                 return -EIO;
7638         }
7639
7640         spin_lock_irqsave(&priv->lock, flags);
7641
7642         if (priv->ibss_beacon)
7643                 dev_kfree_skb(priv->ibss_beacon);
7644
7645         priv->ibss_beacon = skb;
7646
7647         priv->assoc_id = 0;
7648
7649         IWL_DEBUG_MAC80211("leave\n");
7650         spin_unlock_irqrestore(&priv->lock, flags);
7651
7652 #ifdef CONFIG_IWL3945_QOS
7653         iwl3945_reset_qos(priv);
7654 #endif
7655
7656         queue_work(priv->workqueue, &priv->post_associate.work);
7657
7658         mutex_unlock(&priv->mutex);
7659
7660         return 0;
7661 }
7662
7663 /*****************************************************************************
7664  *
7665  * sysfs attributes
7666  *
7667  *****************************************************************************/
7668
7669 #ifdef CONFIG_IWL3945_DEBUG
7670
7671 /*
7672  * The following adds a new attribute to the sysfs representation
7673  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7674  * used for controlling the debug level.
7675  *
7676  * See the level definitions in iwl for details.
7677  */
7678
7679 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7680 {
7681         return sprintf(buf, "0x%08X\n", iwl3945_debug_level);
7682 }
7683 static ssize_t store_debug_level(struct device_driver *d,
7684                                  const char *buf, size_t count)
7685 {
7686         char *p = (char *)buf;
7687         u32 val;
7688
7689         val = simple_strtoul(p, &p, 0);
7690         if (p == buf)
7691                 printk(KERN_INFO DRV_NAME
7692                        ": %s is not in hex or decimal form.\n", buf);
7693         else
7694                 iwl3945_debug_level = val;
7695
7696         return strnlen(buf, count);
7697 }
7698
7699 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7700                    show_debug_level, store_debug_level);
7701
7702 #endif /* CONFIG_IWL3945_DEBUG */
7703
7704 static ssize_t show_rf_kill(struct device *d,
7705                             struct device_attribute *attr, char *buf)
7706 {
7707         /*
7708          * 0 - RF kill not enabled
7709          * 1 - SW based RF kill active (sysfs)
7710          * 2 - HW based RF kill active
7711          * 3 - Both HW and SW based RF kill active
7712          */
7713         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7714         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7715                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7716
7717         return sprintf(buf, "%i\n", val);
7718 }
7719
7720 static ssize_t store_rf_kill(struct device *d,
7721                              struct device_attribute *attr,
7722                              const char *buf, size_t count)
7723 {
7724         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7725
7726         mutex_lock(&priv->mutex);
7727         iwl3945_radio_kill_sw(priv, buf[0] == '1');
7728         mutex_unlock(&priv->mutex);
7729
7730         return count;
7731 }
7732
7733 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7734
7735 static ssize_t show_temperature(struct device *d,
7736                                 struct device_attribute *attr, char *buf)
7737 {
7738         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7739
7740         if (!iwl3945_is_alive(priv))
7741                 return -EAGAIN;
7742
7743         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
7744 }
7745
7746 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7747
7748 static ssize_t show_rs_window(struct device *d,
7749                               struct device_attribute *attr,
7750                               char *buf)
7751 {
7752         struct iwl3945_priv *priv = d->driver_data;
7753         return iwl3945_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7754 }
7755 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7756
7757 static ssize_t show_tx_power(struct device *d,
7758                              struct device_attribute *attr, char *buf)
7759 {
7760         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7761         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7762 }
7763
7764 static ssize_t store_tx_power(struct device *d,
7765                               struct device_attribute *attr,
7766                               const char *buf, size_t count)
7767 {
7768         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7769         char *p = (char *)buf;
7770         u32 val;
7771
7772         val = simple_strtoul(p, &p, 10);
7773         if (p == buf)
7774                 printk(KERN_INFO DRV_NAME
7775                        ": %s is not in decimal form.\n", buf);
7776         else
7777                 iwl3945_hw_reg_set_txpower(priv, val);
7778
7779         return count;
7780 }
7781
7782 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7783
7784 static ssize_t show_flags(struct device *d,
7785                           struct device_attribute *attr, char *buf)
7786 {
7787         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7788
7789         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7790 }
7791
7792 static ssize_t store_flags(struct device *d,
7793                            struct device_attribute *attr,
7794                            const char *buf, size_t count)
7795 {
7796         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7797         u32 flags = simple_strtoul(buf, NULL, 0);
7798
7799         mutex_lock(&priv->mutex);
7800         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7801                 /* Cancel any currently running scans... */
7802                 if (iwl3945_scan_cancel_timeout(priv, 100))
7803                         IWL_WARNING("Could not cancel scan.\n");
7804                 else {
7805                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7806                                        flags);
7807                         priv->staging_rxon.flags = cpu_to_le32(flags);
7808                         iwl3945_commit_rxon(priv);
7809                 }
7810         }
7811         mutex_unlock(&priv->mutex);
7812
7813         return count;
7814 }
7815
7816 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7817
7818 static ssize_t show_filter_flags(struct device *d,
7819                                  struct device_attribute *attr, char *buf)
7820 {
7821         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7822
7823         return sprintf(buf, "0x%04X\n",
7824                 le32_to_cpu(priv->active_rxon.filter_flags));
7825 }
7826
7827 static ssize_t store_filter_flags(struct device *d,
7828                                   struct device_attribute *attr,
7829                                   const char *buf, size_t count)
7830 {
7831         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7832         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7833
7834         mutex_lock(&priv->mutex);
7835         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7836                 /* Cancel any currently running scans... */
7837                 if (iwl3945_scan_cancel_timeout(priv, 100))
7838                         IWL_WARNING("Could not cancel scan.\n");
7839                 else {
7840                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7841                                        "0x%04X\n", filter_flags);
7842                         priv->staging_rxon.filter_flags =
7843                                 cpu_to_le32(filter_flags);
7844                         iwl3945_commit_rxon(priv);
7845                 }
7846         }
7847         mutex_unlock(&priv->mutex);
7848
7849         return count;
7850 }
7851
7852 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7853                    store_filter_flags);
7854
7855 static ssize_t show_tune(struct device *d,
7856                          struct device_attribute *attr, char *buf)
7857 {
7858         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7859
7860         return sprintf(buf, "0x%04X\n",
7861                        (priv->phymode << 8) |
7862                         le16_to_cpu(priv->active_rxon.channel));
7863 }
7864
7865 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv, u8 phymode);
7866
7867 static ssize_t store_tune(struct device *d,
7868                           struct device_attribute *attr,
7869                           const char *buf, size_t count)
7870 {
7871         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7872         char *p = (char *)buf;
7873         u16 tune = simple_strtoul(p, &p, 0);
7874         u8 phymode = (tune >> 8) & 0xff;
7875         u16 channel = tune & 0xff;
7876
7877         IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
7878
7879         mutex_lock(&priv->mutex);
7880         if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
7881             (priv->phymode != phymode)) {
7882                 const struct iwl3945_channel_info *ch_info;
7883
7884                 ch_info = iwl3945_get_channel_info(priv, phymode, channel);
7885                 if (!ch_info) {
7886                         IWL_WARNING("Requested invalid phymode/channel "
7887                                     "combination: %d %d\n", phymode, channel);
7888                         mutex_unlock(&priv->mutex);
7889                         return -EINVAL;
7890                 }
7891
7892                 /* Cancel any currently running scans... */
7893                 if (iwl3945_scan_cancel_timeout(priv, 100))
7894                         IWL_WARNING("Could not cancel scan.\n");
7895                 else {
7896                         IWL_DEBUG_INFO("Committing phymode and "
7897                                        "rxon.channel = %d %d\n",
7898                                        phymode, channel);
7899
7900                         iwl3945_set_rxon_channel(priv, phymode, channel);
7901                         iwl3945_set_flags_for_phymode(priv, phymode);
7902
7903                         iwl3945_set_rate(priv);
7904                         iwl3945_commit_rxon(priv);
7905                 }
7906         }
7907         mutex_unlock(&priv->mutex);
7908
7909         return count;
7910 }
7911
7912 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
7913
7914 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7915
7916 static ssize_t show_measurement(struct device *d,
7917                                 struct device_attribute *attr, char *buf)
7918 {
7919         struct iwl3945_priv *priv = dev_get_drvdata(d);
7920         struct iwl3945_spectrum_notification measure_report;
7921         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7922         u8 *data = (u8 *) & measure_report;
7923         unsigned long flags;
7924
7925         spin_lock_irqsave(&priv->lock, flags);
7926         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7927                 spin_unlock_irqrestore(&priv->lock, flags);
7928                 return 0;
7929         }
7930         memcpy(&measure_report, &priv->measure_report, size);
7931         priv->measurement_status = 0;
7932         spin_unlock_irqrestore(&priv->lock, flags);
7933
7934         while (size && (PAGE_SIZE - len)) {
7935                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7936                                    PAGE_SIZE - len, 1);
7937                 len = strlen(buf);
7938                 if (PAGE_SIZE - len)
7939                         buf[len++] = '\n';
7940
7941                 ofs += 16;
7942                 size -= min(size, 16U);
7943         }
7944
7945         return len;
7946 }
7947
7948 static ssize_t store_measurement(struct device *d,
7949                                  struct device_attribute *attr,
7950                                  const char *buf, size_t count)
7951 {
7952         struct iwl3945_priv *priv = dev_get_drvdata(d);
7953         struct ieee80211_measurement_params params = {
7954                 .channel = le16_to_cpu(priv->active_rxon.channel),
7955                 .start_time = cpu_to_le64(priv->last_tsf),
7956                 .duration = cpu_to_le16(1),
7957         };
7958         u8 type = IWL_MEASURE_BASIC;
7959         u8 buffer[32];
7960         u8 channel;
7961
7962         if (count) {
7963                 char *p = buffer;
7964                 strncpy(buffer, buf, min(sizeof(buffer), count));
7965                 channel = simple_strtoul(p, NULL, 0);
7966                 if (channel)
7967                         params.channel = channel;
7968
7969                 p = buffer;
7970                 while (*p && *p != ' ')
7971                         p++;
7972                 if (*p)
7973                         type = simple_strtoul(p + 1, NULL, 0);
7974         }
7975
7976         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7977                        "channel %d (for '%s')\n", type, params.channel, buf);
7978         iwl3945_get_measurement(priv, &params, type);
7979
7980         return count;
7981 }
7982
7983 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7984                    show_measurement, store_measurement);
7985 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
7986
7987 static ssize_t show_rate(struct device *d,
7988                          struct device_attribute *attr, char *buf)
7989 {
7990         struct iwl3945_priv *priv = dev_get_drvdata(d);
7991         unsigned long flags;
7992         int i;
7993
7994         spin_lock_irqsave(&priv->sta_lock, flags);
7995         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
7996                 i = priv->stations[IWL_AP_ID].current_rate.s.rate;
7997         else
7998                 i = priv->stations[IWL_STA_ID].current_rate.s.rate;
7999         spin_unlock_irqrestore(&priv->sta_lock, flags);
8000
8001         i = iwl3945_rate_index_from_plcp(i);
8002         if (i == -1)
8003                 return sprintf(buf, "0\n");
8004
8005         return sprintf(buf, "%d%s\n",
8006                        (iwl3945_rates[i].ieee >> 1),
8007                        (iwl3945_rates[i].ieee & 0x1) ? ".5" : "");
8008 }
8009
8010 static DEVICE_ATTR(rate, S_IRUSR, show_rate, NULL);
8011
8012 static ssize_t store_retry_rate(struct device *d,
8013                                 struct device_attribute *attr,
8014                                 const char *buf, size_t count)
8015 {
8016         struct iwl3945_priv *priv = dev_get_drvdata(d);
8017
8018         priv->retry_rate = simple_strtoul(buf, NULL, 0);
8019         if (priv->retry_rate <= 0)
8020                 priv->retry_rate = 1;
8021
8022         return count;
8023 }
8024
8025 static ssize_t show_retry_rate(struct device *d,
8026                                struct device_attribute *attr, char *buf)
8027 {
8028         struct iwl3945_priv *priv = dev_get_drvdata(d);
8029         return sprintf(buf, "%d", priv->retry_rate);
8030 }
8031
8032 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
8033                    store_retry_rate);
8034
8035 static ssize_t store_power_level(struct device *d,
8036                                  struct device_attribute *attr,
8037                                  const char *buf, size_t count)
8038 {
8039         struct iwl3945_priv *priv = dev_get_drvdata(d);
8040         int rc;
8041         int mode;
8042
8043         mode = simple_strtoul(buf, NULL, 0);
8044         mutex_lock(&priv->mutex);
8045
8046         if (!iwl3945_is_ready(priv)) {
8047                 rc = -EAGAIN;
8048                 goto out;
8049         }
8050
8051         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
8052                 mode = IWL_POWER_AC;
8053         else
8054                 mode |= IWL_POWER_ENABLED;
8055
8056         if (mode != priv->power_mode) {
8057                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
8058                 if (rc) {
8059                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
8060                         goto out;
8061                 }
8062                 priv->power_mode = mode;
8063         }
8064
8065         rc = count;
8066
8067  out:
8068         mutex_unlock(&priv->mutex);
8069         return rc;
8070 }
8071
8072 #define MAX_WX_STRING 80
8073
8074 /* Values are in microsecond */
8075 static const s32 timeout_duration[] = {
8076         350000,
8077         250000,
8078         75000,
8079         37000,
8080         25000,
8081 };
8082 static const s32 period_duration[] = {
8083         400000,
8084         700000,
8085         1000000,
8086         1000000,
8087         1000000
8088 };
8089
8090 static ssize_t show_power_level(struct device *d,
8091                                 struct device_attribute *attr, char *buf)
8092 {
8093         struct iwl3945_priv *priv = dev_get_drvdata(d);
8094         int level = IWL_POWER_LEVEL(priv->power_mode);
8095         char *p = buf;
8096
8097         p += sprintf(p, "%d ", level);
8098         switch (level) {
8099         case IWL_POWER_MODE_CAM:
8100         case IWL_POWER_AC:
8101                 p += sprintf(p, "(AC)");
8102                 break;
8103         case IWL_POWER_BATTERY:
8104                 p += sprintf(p, "(BATTERY)");
8105                 break;
8106         default:
8107                 p += sprintf(p,
8108                              "(Timeout %dms, Period %dms)",
8109                              timeout_duration[level - 1] / 1000,
8110                              period_duration[level - 1] / 1000);
8111         }
8112
8113         if (!(priv->power_mode & IWL_POWER_ENABLED))
8114                 p += sprintf(p, " OFF\n");
8115         else
8116                 p += sprintf(p, " \n");
8117
8118         return (p - buf + 1);
8119
8120 }
8121
8122 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8123                    store_power_level);
8124
8125 static ssize_t show_channels(struct device *d,
8126                              struct device_attribute *attr, char *buf)
8127 {
8128         struct iwl3945_priv *priv = dev_get_drvdata(d);
8129         int len = 0, i;
8130         struct ieee80211_channel *channels = NULL;
8131         const struct ieee80211_hw_mode *hw_mode = NULL;
8132         int count = 0;
8133
8134         if (!iwl3945_is_ready(priv))
8135                 return -EAGAIN;
8136
8137         hw_mode = iwl3945_get_hw_mode(priv, MODE_IEEE80211G);
8138         if (!hw_mode)
8139                 hw_mode = iwl3945_get_hw_mode(priv, MODE_IEEE80211B);
8140         if (hw_mode) {
8141                 channels = hw_mode->channels;
8142                 count = hw_mode->num_channels;
8143         }
8144
8145         len +=
8146             sprintf(&buf[len],
8147                     "Displaying %d channels in 2.4GHz band "
8148                     "(802.11bg):\n", count);
8149
8150         for (i = 0; i < count; i++)
8151                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8152                                channels[i].chan,
8153                                channels[i].power_level,
8154                                channels[i].
8155                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8156                                " (IEEE 802.11h required)" : "",
8157                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8158                                 || (channels[i].
8159                                     flag &
8160                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8161                                ", IBSS",
8162                                channels[i].
8163                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8164                                "active/passive" : "passive only");
8165
8166         hw_mode = iwl3945_get_hw_mode(priv, MODE_IEEE80211A);
8167         if (hw_mode) {
8168                 channels = hw_mode->channels;
8169                 count = hw_mode->num_channels;
8170         } else {
8171                 channels = NULL;
8172                 count = 0;
8173         }
8174
8175         len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8176                        "(802.11a):\n", count);
8177
8178         for (i = 0; i < count; i++)
8179                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8180                                channels[i].chan,
8181                                channels[i].power_level,
8182                                channels[i].
8183                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8184                                " (IEEE 802.11h required)" : "",
8185                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8186                                 || (channels[i].
8187                                     flag &
8188                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8189                                ", IBSS",
8190                                channels[i].
8191                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8192                                "active/passive" : "passive only");
8193
8194         return len;
8195 }
8196
8197 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8198
8199 static ssize_t show_statistics(struct device *d,
8200                                struct device_attribute *attr, char *buf)
8201 {
8202         struct iwl3945_priv *priv = dev_get_drvdata(d);
8203         u32 size = sizeof(struct iwl3945_notif_statistics);
8204         u32 len = 0, ofs = 0;
8205         u8 *data = (u8 *) & priv->statistics;
8206         int rc = 0;
8207
8208         if (!iwl3945_is_alive(priv))
8209                 return -EAGAIN;
8210
8211         mutex_lock(&priv->mutex);
8212         rc = iwl3945_send_statistics_request(priv);
8213         mutex_unlock(&priv->mutex);
8214
8215         if (rc) {
8216                 len = sprintf(buf,
8217                               "Error sending statistics request: 0x%08X\n", rc);
8218                 return len;
8219         }
8220
8221         while (size && (PAGE_SIZE - len)) {
8222                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8223                                    PAGE_SIZE - len, 1);
8224                 len = strlen(buf);
8225                 if (PAGE_SIZE - len)
8226                         buf[len++] = '\n';
8227
8228                 ofs += 16;
8229                 size -= min(size, 16U);
8230         }
8231
8232         return len;
8233 }
8234
8235 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8236
8237 static ssize_t show_antenna(struct device *d,
8238                             struct device_attribute *attr, char *buf)
8239 {
8240         struct iwl3945_priv *priv = dev_get_drvdata(d);
8241
8242         if (!iwl3945_is_alive(priv))
8243                 return -EAGAIN;
8244
8245         return sprintf(buf, "%d\n", priv->antenna);
8246 }
8247
8248 static ssize_t store_antenna(struct device *d,
8249                              struct device_attribute *attr,
8250                              const char *buf, size_t count)
8251 {
8252         int ant;
8253         struct iwl3945_priv *priv = dev_get_drvdata(d);
8254
8255         if (count == 0)
8256                 return 0;
8257
8258         if (sscanf(buf, "%1i", &ant) != 1) {
8259                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8260                 return count;
8261         }
8262
8263         if ((ant >= 0) && (ant <= 2)) {
8264                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8265                 priv->antenna = (enum iwl3945_antenna)ant;
8266         } else
8267                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8268
8269
8270         return count;
8271 }
8272
8273 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8274
8275 static ssize_t show_status(struct device *d,
8276                            struct device_attribute *attr, char *buf)
8277 {
8278         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
8279         if (!iwl3945_is_alive(priv))
8280                 return -EAGAIN;
8281         return sprintf(buf, "0x%08x\n", (int)priv->status);
8282 }
8283
8284 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8285
8286 static ssize_t dump_error_log(struct device *d,
8287                               struct device_attribute *attr,
8288                               const char *buf, size_t count)
8289 {
8290         char *p = (char *)buf;
8291
8292         if (p[0] == '1')
8293                 iwl3945_dump_nic_error_log((struct iwl3945_priv *)d->driver_data);
8294
8295         return strnlen(buf, count);
8296 }
8297
8298 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8299
8300 static ssize_t dump_event_log(struct device *d,
8301                               struct device_attribute *attr,
8302                               const char *buf, size_t count)
8303 {
8304         char *p = (char *)buf;
8305
8306         if (p[0] == '1')
8307                 iwl3945_dump_nic_event_log((struct iwl3945_priv *)d->driver_data);
8308
8309         return strnlen(buf, count);
8310 }
8311
8312 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8313
8314 /*****************************************************************************
8315  *
8316  * driver setup and teardown
8317  *
8318  *****************************************************************************/
8319
8320 static void iwl3945_setup_deferred_work(struct iwl3945_priv *priv)
8321 {
8322         priv->workqueue = create_workqueue(DRV_NAME);
8323
8324         init_waitqueue_head(&priv->wait_command_queue);
8325
8326         INIT_WORK(&priv->up, iwl3945_bg_up);
8327         INIT_WORK(&priv->restart, iwl3945_bg_restart);
8328         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
8329         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
8330         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
8331         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
8332         INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
8333         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
8334         INIT_DELAYED_WORK(&priv->post_associate, iwl3945_bg_post_associate);
8335         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
8336         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
8337         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
8338
8339         iwl3945_hw_setup_deferred_work(priv);
8340
8341         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8342                      iwl3945_irq_tasklet, (unsigned long)priv);
8343 }
8344
8345 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv)
8346 {
8347         iwl3945_hw_cancel_deferred_work(priv);
8348
8349         cancel_delayed_work_sync(&priv->init_alive_start);
8350         cancel_delayed_work(&priv->scan_check);
8351         cancel_delayed_work(&priv->alive_start);
8352         cancel_delayed_work(&priv->post_associate);
8353         cancel_work_sync(&priv->beacon_update);
8354 }
8355
8356 static struct attribute *iwl3945_sysfs_entries[] = {
8357         &dev_attr_antenna.attr,
8358         &dev_attr_channels.attr,
8359         &dev_attr_dump_errors.attr,
8360         &dev_attr_dump_events.attr,
8361         &dev_attr_flags.attr,
8362         &dev_attr_filter_flags.attr,
8363 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
8364         &dev_attr_measurement.attr,
8365 #endif
8366         &dev_attr_power_level.attr,
8367         &dev_attr_rate.attr,
8368         &dev_attr_retry_rate.attr,
8369         &dev_attr_rf_kill.attr,
8370         &dev_attr_rs_window.attr,
8371         &dev_attr_statistics.attr,
8372         &dev_attr_status.attr,
8373         &dev_attr_temperature.attr,
8374         &dev_attr_tune.attr,
8375         &dev_attr_tx_power.attr,
8376
8377         NULL
8378 };
8379
8380 static struct attribute_group iwl3945_attribute_group = {
8381         .name = NULL,           /* put in device directory */
8382         .attrs = iwl3945_sysfs_entries,
8383 };
8384
8385 static struct ieee80211_ops iwl3945_hw_ops = {
8386         .tx = iwl3945_mac_tx,
8387         .start = iwl3945_mac_start,
8388         .stop = iwl3945_mac_stop,
8389         .add_interface = iwl3945_mac_add_interface,
8390         .remove_interface = iwl3945_mac_remove_interface,
8391         .config = iwl3945_mac_config,
8392         .config_interface = iwl3945_mac_config_interface,
8393         .configure_filter = iwl3945_configure_filter,
8394         .set_key = iwl3945_mac_set_key,
8395         .get_stats = iwl3945_mac_get_stats,
8396         .get_tx_stats = iwl3945_mac_get_tx_stats,
8397         .conf_tx = iwl3945_mac_conf_tx,
8398         .get_tsf = iwl3945_mac_get_tsf,
8399         .reset_tsf = iwl3945_mac_reset_tsf,
8400         .beacon_update = iwl3945_mac_beacon_update,
8401         .hw_scan = iwl3945_mac_hw_scan
8402 };
8403
8404 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8405 {
8406         int err = 0;
8407         u32 pci_id;
8408         struct iwl3945_priv *priv;
8409         struct ieee80211_hw *hw;
8410         int i;
8411         DECLARE_MAC_BUF(mac);
8412
8413         /* Disabling hardware scan means that mac80211 will perform scans
8414          * "the hard way", rather than using device's scan. */
8415         if (iwl3945_param_disable_hw_scan) {
8416                 IWL_DEBUG_INFO("Disabling hw_scan\n");
8417                 iwl3945_hw_ops.hw_scan = NULL;
8418         }
8419
8420         if ((iwl3945_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8421             (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8422                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8423                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8424                 err = -EINVAL;
8425                 goto out;
8426         }
8427
8428         /* mac80211 allocates memory for this device instance, including
8429          *   space for this driver's private structure */
8430         hw = ieee80211_alloc_hw(sizeof(struct iwl3945_priv), &iwl3945_hw_ops);
8431         if (hw == NULL) {
8432                 IWL_ERROR("Can not allocate network device\n");
8433                 err = -ENOMEM;
8434                 goto out;
8435         }
8436         SET_IEEE80211_DEV(hw, &pdev->dev);
8437
8438         hw->rate_control_algorithm = "iwl-3945-rs";
8439
8440         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8441         priv = hw->priv;
8442         priv->hw = hw;
8443
8444         priv->pci_dev = pdev;
8445
8446         /* Select antenna (may be helpful if only one antenna is connected) */
8447         priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
8448 #ifdef CONFIG_IWL3945_DEBUG
8449         iwl3945_debug_level = iwl3945_param_debug;
8450         atomic_set(&priv->restrict_refcnt, 0);
8451 #endif
8452         priv->retry_rate = 1;
8453
8454         priv->ibss_beacon = NULL;
8455
8456         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8457          *   the range of signal quality values that we'll provide.
8458          * Negative values for level/noise indicate that we'll provide dBm.
8459          * For WE, at least, non-0 values here *enable* display of values
8460          *   in app (iwconfig). */
8461         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
8462         hw->max_noise = -20;    /* noise level, negative indicates dBm */
8463         hw->max_signal = 100;   /* link quality indication (%) */
8464
8465         /* Tell mac80211 our Tx characteristics */
8466         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8467
8468         /* 4 EDCA QOS priorities */
8469         hw->queues = 4;
8470
8471         spin_lock_init(&priv->lock);
8472         spin_lock_init(&priv->power_data.lock);
8473         spin_lock_init(&priv->sta_lock);
8474         spin_lock_init(&priv->hcmd_lock);
8475
8476         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8477                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8478
8479         INIT_LIST_HEAD(&priv->free_frames);
8480
8481         mutex_init(&priv->mutex);
8482         if (pci_enable_device(pdev)) {
8483                 err = -ENODEV;
8484                 goto out_ieee80211_free_hw;
8485         }
8486
8487         pci_set_master(pdev);
8488
8489         /* Clear the driver's (not device's) station table */
8490         iwl3945_clear_stations_table(priv);
8491
8492         priv->data_retry_limit = -1;
8493         priv->ieee_channels = NULL;
8494         priv->ieee_rates = NULL;
8495         priv->phymode = -1;
8496
8497         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8498         if (!err)
8499                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8500         if (err) {
8501                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8502                 goto out_pci_disable_device;
8503         }
8504
8505         pci_set_drvdata(pdev, priv);
8506         err = pci_request_regions(pdev, DRV_NAME);
8507         if (err)
8508                 goto out_pci_disable_device;
8509
8510         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8511          * PCI Tx retries from interfering with C3 CPU state */
8512         pci_write_config_byte(pdev, 0x41, 0x00);
8513
8514         priv->hw_base = pci_iomap(pdev, 0, 0);
8515         if (!priv->hw_base) {
8516                 err = -ENODEV;
8517                 goto out_pci_release_regions;
8518         }
8519
8520         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8521                         (unsigned long long) pci_resource_len(pdev, 0));
8522         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8523
8524         /* Initialize module parameter values here */
8525
8526         /* Disable radio (SW RF KILL) via parameter when loading driver */
8527         if (iwl3945_param_disable) {
8528                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8529                 IWL_DEBUG_INFO("Radio disabled.\n");
8530         }
8531
8532         priv->iw_mode = IEEE80211_IF_TYPE_STA;
8533
8534         pci_id =
8535             (priv->pci_dev->device << 16) | priv->pci_dev->subsystem_device;
8536
8537         switch (pci_id) {
8538         case 0x42221005:        /* 0x4222 0x8086 0x1005 is BG SKU */
8539         case 0x42221034:        /* 0x4222 0x8086 0x1034 is BG SKU */
8540         case 0x42271014:        /* 0x4227 0x8086 0x1014 is BG SKU */
8541         case 0x42221044:        /* 0x4222 0x8086 0x1044 is BG SKU */
8542                 priv->is_abg = 0;
8543                 break;
8544
8545         /*
8546          * Rest are assumed ABG SKU -- if this is not the
8547          * case then the card will get the wrong 'Detected'
8548          * line in the kernel log however the code that
8549          * initializes the GEO table will detect no A-band
8550          * channels and remove the is_abg mask.
8551          */
8552         default:
8553                 priv->is_abg = 1;
8554                 break;
8555         }
8556
8557         printk(KERN_INFO DRV_NAME
8558                ": Detected Intel PRO/Wireless 3945%sBG Network Connection\n",
8559                priv->is_abg ? "A" : "");
8560
8561         /* Device-specific setup */
8562         if (iwl3945_hw_set_hw_setting(priv)) {
8563                 IWL_ERROR("failed to set hw settings\n");
8564                 goto out_iounmap;
8565         }
8566
8567 #ifdef CONFIG_IWL3945_QOS
8568         if (iwl3945_param_qos_enable)
8569                 priv->qos_data.qos_enable = 1;
8570
8571         iwl3945_reset_qos(priv);
8572
8573         priv->qos_data.qos_active = 0;
8574         priv->qos_data.qos_cap.val = 0;
8575 #endif /* CONFIG_IWL3945_QOS */
8576
8577         iwl3945_set_rxon_channel(priv, MODE_IEEE80211G, 6);
8578         iwl3945_setup_deferred_work(priv);
8579         iwl3945_setup_rx_handlers(priv);
8580
8581         priv->rates_mask = IWL_RATES_MASK;
8582         /* If power management is turned on, default to AC mode */
8583         priv->power_mode = IWL_POWER_AC;
8584         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8585
8586         iwl3945_disable_interrupts(priv);
8587
8588         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8589         if (err) {
8590                 IWL_ERROR("failed to create sysfs device attributes\n");
8591                 goto out_release_irq;
8592         }
8593
8594         /* nic init */
8595         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
8596                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
8597
8598         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
8599         err = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
8600                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
8601                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
8602         if (err < 0) {
8603                 IWL_DEBUG_INFO("Failed to init the card\n");
8604                 goto out_remove_sysfs;
8605         }
8606         /* Read the EEPROM */
8607         err = iwl3945_eeprom_init(priv);
8608         if (err) {
8609                 IWL_ERROR("Unable to init EEPROM\n");
8610                 goto out_remove_sysfs;
8611         }
8612         /* MAC Address location in EEPROM same for 3945/4965 */
8613         get_eeprom_mac(priv, priv->mac_addr);
8614         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
8615         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
8616
8617         iwl3945_rate_control_register(priv->hw);
8618         err = ieee80211_register_hw(priv->hw);
8619         if (err) {
8620                 IWL_ERROR("Failed to register network device (error %d)\n", err);
8621                 goto out_remove_sysfs;
8622         }
8623
8624         priv->hw->conf.beacon_int = 100;
8625         priv->mac80211_registered = 1;
8626         pci_save_state(pdev);
8627         pci_disable_device(pdev);
8628
8629         return 0;
8630
8631  out_remove_sysfs:
8632         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8633
8634  out_release_irq:
8635         destroy_workqueue(priv->workqueue);
8636         priv->workqueue = NULL;
8637         iwl3945_unset_hw_setting(priv);
8638
8639  out_iounmap:
8640         pci_iounmap(pdev, priv->hw_base);
8641  out_pci_release_regions:
8642         pci_release_regions(pdev);
8643  out_pci_disable_device:
8644         pci_disable_device(pdev);
8645         pci_set_drvdata(pdev, NULL);
8646  out_ieee80211_free_hw:
8647         ieee80211_free_hw(priv->hw);
8648  out:
8649         return err;
8650 }
8651
8652 static void iwl3945_pci_remove(struct pci_dev *pdev)
8653 {
8654         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8655         struct list_head *p, *q;
8656         int i;
8657
8658         if (!priv)
8659                 return;
8660
8661         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8662
8663         set_bit(STATUS_EXIT_PENDING, &priv->status);
8664
8665         iwl3945_down(priv);
8666
8667         /* Free MAC hash list for ADHOC */
8668         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8669                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8670                         list_del(p);
8671                         kfree(list_entry(p, struct iwl3945_ibss_seq, list));
8672                 }
8673         }
8674
8675         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8676
8677         iwl3945_dealloc_ucode_pci(priv);
8678
8679         if (priv->rxq.bd)
8680                 iwl3945_rx_queue_free(priv, &priv->rxq);
8681         iwl3945_hw_txq_ctx_free(priv);
8682
8683         iwl3945_unset_hw_setting(priv);
8684         iwl3945_clear_stations_table(priv);
8685
8686         if (priv->mac80211_registered) {
8687                 ieee80211_unregister_hw(priv->hw);
8688                 iwl3945_rate_control_unregister(priv->hw);
8689         }
8690
8691         /*netif_stop_queue(dev); */
8692         flush_workqueue(priv->workqueue);
8693
8694         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
8695          * priv->workqueue... so we can't take down the workqueue
8696          * until now... */
8697         destroy_workqueue(priv->workqueue);
8698         priv->workqueue = NULL;
8699
8700         pci_iounmap(pdev, priv->hw_base);
8701         pci_release_regions(pdev);
8702         pci_disable_device(pdev);
8703         pci_set_drvdata(pdev, NULL);
8704
8705         kfree(priv->channel_info);
8706
8707         kfree(priv->ieee_channels);
8708         kfree(priv->ieee_rates);
8709
8710         if (priv->ibss_beacon)
8711                 dev_kfree_skb(priv->ibss_beacon);
8712
8713         ieee80211_free_hw(priv->hw);
8714 }
8715
8716 #ifdef CONFIG_PM
8717
8718 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8719 {
8720         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8721
8722         if (priv->is_open) {
8723                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8724                 iwl3945_mac_stop(priv->hw);
8725                 priv->is_open = 1;
8726         }
8727
8728         pci_set_power_state(pdev, PCI_D3hot);
8729
8730         return 0;
8731 }
8732
8733 static int iwl3945_pci_resume(struct pci_dev *pdev)
8734 {
8735         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8736
8737         pci_set_power_state(pdev, PCI_D0);
8738
8739         if (priv->is_open)
8740                 iwl3945_mac_start(priv->hw);
8741
8742         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8743         return 0;
8744 }
8745
8746 #endif /* CONFIG_PM */
8747
8748 /*****************************************************************************
8749  *
8750  * driver and module entry point
8751  *
8752  *****************************************************************************/
8753
8754 static struct pci_driver iwl3945_driver = {
8755         .name = DRV_NAME,
8756         .id_table = iwl3945_hw_card_ids,
8757         .probe = iwl3945_pci_probe,
8758         .remove = __devexit_p(iwl3945_pci_remove),
8759 #ifdef CONFIG_PM
8760         .suspend = iwl3945_pci_suspend,
8761         .resume = iwl3945_pci_resume,
8762 #endif
8763 };
8764
8765 static int __init iwl3945_init(void)
8766 {
8767
8768         int ret;
8769         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8770         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8771         ret = pci_register_driver(&iwl3945_driver);
8772         if (ret) {
8773                 IWL_ERROR("Unable to initialize PCI module\n");
8774                 return ret;
8775         }
8776 #ifdef CONFIG_IWL3945_DEBUG
8777         ret = driver_create_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8778         if (ret) {
8779                 IWL_ERROR("Unable to create driver sysfs file\n");
8780                 pci_unregister_driver(&iwl3945_driver);
8781                 return ret;
8782         }
8783 #endif
8784
8785         return ret;
8786 }
8787
8788 static void __exit iwl3945_exit(void)
8789 {
8790 #ifdef CONFIG_IWL3945_DEBUG
8791         driver_remove_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8792 #endif
8793         pci_unregister_driver(&iwl3945_driver);
8794 }
8795
8796 module_param_named(antenna, iwl3945_param_antenna, int, 0444);
8797 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8798 module_param_named(disable, iwl3945_param_disable, int, 0444);
8799 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8800 module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
8801 MODULE_PARM_DESC(hwcrypto,
8802                  "using hardware crypto engine (default 0 [software])\n");
8803 module_param_named(debug, iwl3945_param_debug, int, 0444);
8804 MODULE_PARM_DESC(debug, "debug output mask");
8805 module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
8806 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8807
8808 module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
8809 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8810
8811 /* QoS */
8812 module_param_named(qos_enable, iwl3945_param_qos_enable, int, 0444);
8813 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8814
8815 module_exit(iwl3945_exit);
8816 module_init(iwl3945_init);