drivers/net/wireless/hostap/hostap_hw.c

   1 /*
   2  * Host AP (software wireless LAN access point) driver for
   3  * Intersil Prism2/2.5/3.
   4  *
   5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   6  * <jkmaline@cc.hut.fi>
   7  * Copyright (c) 2002-2004, Jouni Malinen <jkmaline@cc.hut.fi>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation. See README and COPYING for
  12  * more details.
  13  *
  14  * FIX:
  15  * - there is currently no way of associating TX packets to correct wds device
  16  *   when TX Exc/OK event occurs, so all tx_packets and some
  17  *   tx_errors/tx_dropped are added to the main netdevice; using sw_support
  18  *   field in txdesc might be used to fix this (using Alloc event to increment
  19  *   tx_packets would need some further info in txfid table)
  20  *
  21  * Buffer Access Path (BAP) usage:
  22  *   Prism2 cards have two separate BAPs for accessing the card memory. These
  23  *   should allow concurrent access to two different frames and the driver
  24  *   previously used BAP0 for sending data and BAP1 for receiving data.
  25  *   However, there seems to be number of issues with concurrent access and at
  26  *   least one know hardware bug in using BAP0 and BAP1 concurrently with PCI
  27  *   Prism2.5. Therefore, the driver now only uses BAP0 for moving data between
  28  *   host and card memories. BAP0 accesses are protected with local->baplock
  29  *   (spin_lock_bh) to prevent concurrent use.
  30  */
  31
  32
  33 #include <linux/config.h>
  34 #include <linux/version.h>
  35
  36 #include <asm/delay.h>
  37 #include <asm/uaccess.h>
  38
  39 #include <linux/slab.h>
  40 #include <linux/netdevice.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/proc_fs.h>
  43 #include <linux/if_arp.h>
  44 #include <linux/delay.h>
  45 #include <linux/random.h>
  46 #include <linux/wait.h>
  47 #include <linux/sched.h>
  48 #include <linux/rtnetlink.h>
  49 #include <linux/wireless.h>
  50 #include <net/iw_handler.h>
  51 #include <asm/irq.h>
  52
  53
  54 #include "hostap_80211.h"
  55 #include "hostap.h"
  56 #include "hostap_ap.h"
  57
  58
  59 /* #define final_version */
  60
  61 static int mtu = 1500;
  62 module_param(mtu, int, 0444);
  63 MODULE_PARM_DESC(mtu, "Maximum transfer unit");
  64
  65 static int channel[MAX_PARM_DEVICES] = { 3, DEF_INTS };
  66 module_param_array(channel, int, NULL, 0444);
  67 MODULE_PARM_DESC(channel, "Initial channel");
  68
  69 static char essid[33] = "test";
  70 module_param_string(essid, essid, sizeof(essid), 0444);
  71 MODULE_PARM_DESC(essid, "Host AP's ESSID");
  72
  73 static int iw_mode[MAX_PARM_DEVICES] = { IW_MODE_MASTER, DEF_INTS };
  74 module_param_array(iw_mode, int, NULL, 0444);
  75 MODULE_PARM_DESC(iw_mode, "Initial operation mode");
  76
  77 static int beacon_int[MAX_PARM_DEVICES] = { 100, DEF_INTS };
  78 module_param_array(beacon_int, int, NULL, 0444);
  79 MODULE_PARM_DESC(beacon_int, "Beacon interval (1 = 1024 usec)");
  80
  81 static int dtim_period[MAX_PARM_DEVICES] = { 1, DEF_INTS };
  82 module_param_array(dtim_period, int, NULL, 0444);
  83 MODULE_PARM_DESC(dtim_period, "DTIM period");
  84
  85 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
  86 static int bus_master_threshold_rx[MAX_PARM_DEVICES] = { 100, DEF_INTS };
  87 module_param_array(bus_master_threshold_rx, int, NULL, 0444);
  88 MODULE_PARM_DESC(bus_master_threshold_rx, "Packet length threshold for using "
  89                  "PCI bus master on RX");
  90
  91 static int bus_master_threshold_tx[MAX_PARM_DEVICES] = { 100, DEF_INTS };
  92 module_param_array(bus_master_threshold_tx, int, NULL, 0444);
  93 MODULE_PARM_DESC(bus_master_threshold_tx, "Packet length threshold for using "
  94                  "PCI bus master on TX");
  95 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
  96
  97 static char dev_template[16] = "wlan%d";
  98 module_param_string(dev_template, dev_template, sizeof(dev_template), 0444);
  99 MODULE_PARM_DESC(dev_template, "Prefix for network device name (default: "
 100                  "wlan%d)");
 101
 102 #ifdef final_version
 103 #define EXTRA_EVENTS_WTERR 0
 104 #else
 105 /* check WTERR events (Wait Time-out) in development versions */
 106 #define EXTRA_EVENTS_WTERR HFA384X_EV_WTERR
 107 #endif
 108
 109 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
 110 #define EXTRA_EVENTS_BUS_MASTER (HFA384X_EV_PCI_M0 | HFA384X_EV_PCI_M1)
 111 #else
 112 #define EXTRA_EVENTS_BUS_MASTER 0
 113 #endif
 114
 115 /* Events that will be using BAP0 */
 116 #define HFA384X_BAP0_EVENTS \
 117         (HFA384X_EV_TXEXC | HFA384X_EV_RX | HFA384X_EV_INFO | HFA384X_EV_TX)
 118
 119 /* event mask, i.e., events that will result in an interrupt */
 120 #define HFA384X_EVENT_MASK \
 121         (HFA384X_BAP0_EVENTS | HFA384X_EV_ALLOC | HFA384X_EV_INFDROP | \
 122         HFA384X_EV_CMD | HFA384X_EV_TICK | \
 123         EXTRA_EVENTS_WTERR | EXTRA_EVENTS_BUS_MASTER)
 124
 125 /* Default TX control flags: use 802.11 headers and request interrupt for
 126  * failed transmits. Frames that request ACK callback, will add
 127  * _TX_OK flag and _ALT_RTRY flag may be used to select different retry policy.
 128  */
 129 #define HFA384X_TX_CTRL_FLAGS \
 130         (HFA384X_TX_CTRL_802_11 | HFA384X_TX_CTRL_TX_EX)
 131
 132
 133 /* ca. 1 usec */
 134 #define HFA384X_CMD_BUSY_TIMEOUT 5000
 135 #define HFA384X_BAP_BUSY_TIMEOUT 50000
 136
 137 /* ca. 10 usec */
 138 #define HFA384X_CMD_COMPL_TIMEOUT 20000
 139 #define HFA384X_DL_COMPL_TIMEOUT 1000000
 140
 141 /* Wait times for initialization; yield to other processes to avoid busy
 142  * waiting for long time. */
 143 #define HFA384X_INIT_TIMEOUT (HZ / 2) /* 500 ms */
 144 #define HFA384X_ALLOC_COMPL_TIMEOUT (HZ / 20) /* 50 ms */
 145
 146
 147 static void prism2_hw_reset(struct net_device *dev);
 148 static void prism2_check_sta_fw_version(local_info_t *local);
 149
 150 #ifdef PRISM2_DOWNLOAD_SUPPORT
 151 /* hostap_download.c */
 152 static int prism2_download_aux_dump(struct net_device *dev,
 153                                     unsigned int addr, int len, u8 *buf);
 154 static u8 * prism2_read_pda(struct net_device *dev);
 155 static int prism2_download(local_info_t *local,
 156                            struct prism2_download_param *param);
 157 static void prism2_download_free_data(struct prism2_download_data *dl);
 158 static int prism2_download_volatile(local_info_t *local,
 159                                     struct prism2_download_data *param);
 160 static int prism2_download_genesis(local_info_t *local,
 161                                    struct prism2_download_data *param);
 162 static int prism2_get_ram_size(local_info_t *local);
 163 #endif /* PRISM2_DOWNLOAD_SUPPORT */
 164
 165
 166
 167
 168 #ifndef final_version
 169 /* magic value written to SWSUPPORT0 reg. for detecting whether card is still
 170  * present */
 171 #define HFA384X_MAGIC 0x8A32
 172 #endif
 173
 174
 175 static u16 hfa384x_read_reg(struct net_device *dev, u16 reg)
 176 {
 177         return HFA384X_INW(reg);
 178 }
 179
 180
 181 static void hfa384x_read_regs(struct net_device *dev,
 182                               struct hfa384x_regs *regs)
 183 {
 184         regs->cmd = HFA384X_INW(HFA384X_CMD_OFF);
 185         regs->evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
 186         regs->offset0 = HFA384X_INW(HFA384X_OFFSET0_OFF);
 187         regs->offset1 = HFA384X_INW(HFA384X_OFFSET1_OFF);
 188         regs->swsupport0 = HFA384X_INW(HFA384X_SWSUPPORT0_OFF);
 189 }
 190
 191
 192 /**
 193  * __hostap_cmd_queue_free - Free Prism2 command queue entry (private)
 194  * @local: pointer to private Host AP driver data
 195  * @entry: Prism2 command queue entry to be freed
 196  * @del_req: request the entry to be removed
 197  *
 198  * Internal helper function for freeing Prism2 command queue entries.
 199  * Caller must have acquired local->cmdlock before calling this function.
 200  */
 201 static inline void __hostap_cmd_queue_free(local_info_t *local,
 202                                            struct hostap_cmd_queue *entry,
 203                                            int del_req)
 204 {
 205         if (del_req) {
 206                 entry->del_req = 1;
 207                 if (!list_empty(&entry->list)) {
 208                         list_del_init(&entry->list);
 209                         local->cmd_queue_len--;
 210                 }
 211         }
 212
 213         if (atomic_dec_and_test(&entry->usecnt) && entry->del_req)
 214                 kfree(entry);
 215 }
 216
 217
 218 /**
 219  * hostap_cmd_queue_free - Free Prism2 command queue entry
 220  * @local: pointer to private Host AP driver data
 221  * @entry: Prism2 command queue entry to be freed
 222  * @del_req: request the entry to be removed
 223  *
 224  * Free a Prism2 command queue entry.
 225  */
 226 static inline void hostap_cmd_queue_free(local_info_t *local,
 227                                          struct hostap_cmd_queue *entry,
 228                                          int del_req)
 229 {
 230         unsigned long flags;
 231
 232         spin_lock_irqsave(&local->cmdlock, flags);
 233         __hostap_cmd_queue_free(local, entry, del_req);
 234         spin_unlock_irqrestore(&local->cmdlock, flags);
 235 }
 236
 237
 238 /**
 239  * prism2_clear_cmd_queue - Free all pending Prism2 command queue entries
 240  * @local: pointer to private Host AP driver data
 241  */
 242 static void prism2_clear_cmd_queue(local_info_t *local)
 243 {
 244         struct list_head *ptr, *n;
 245         unsigned long flags;
 246         struct hostap_cmd_queue *entry;
 247
 248         spin_lock_irqsave(&local->cmdlock, flags);
 249         list_for_each_safe(ptr, n, &local->cmd_queue) {
 250                 entry = list_entry(ptr, struct hostap_cmd_queue, list);
 251                 atomic_inc(&entry->usecnt);
 252                 printk(KERN_DEBUG "%s: removed pending cmd_queue entry "
 253                        "(type=%d, cmd=0x%04x, param0=0x%04x)\n",
 254                        local->dev->name, entry->type, entry->cmd,
 255                        entry->param0);
 256                 __hostap_cmd_queue_free(local, entry, 1);
 257         }
 258         if (local->cmd_queue_len) {
 259                 /* This should not happen; print debug message and clear
 260                  * queue length. */
 261                 printk(KERN_DEBUG "%s: cmd_queue_len (%d) not zero after "
 262                        "flush\n", local->dev->name, local->cmd_queue_len);
 263                 local->cmd_queue_len = 0;
 264         }
 265         spin_unlock_irqrestore(&local->cmdlock, flags);
 266 }
 267
 268
 269 /**
 270  * hfa384x_cmd_issue - Issue a Prism2 command to the hardware
 271  * @dev: pointer to net_device
 272  * @entry: Prism2 command queue entry to be issued
 273  */
 274 static inline int hfa384x_cmd_issue(struct net_device *dev,
 275                                     struct hostap_cmd_queue *entry)
 276 {
 277         struct hostap_interface *iface;
 278         local_info_t *local;
 279         int tries;
 280         u16 reg;
 281         unsigned long flags;
 282
 283         iface = netdev_priv(dev);
 284         local = iface->local;
 285
 286         if (local->func->card_present && !local->func->card_present(local))
 287                 return -ENODEV;
 288
 289         if (entry->issued) {
 290                 printk(KERN_DEBUG "%s: driver bug - re-issuing command @%p\n",
 291                        dev->name, entry);
 292         }
 293
 294         /* wait until busy bit is clear; this should always be clear since the
 295          * commands are serialized */
 296         tries = HFA384X_CMD_BUSY_TIMEOUT;
 297         while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
 298                 tries--;
 299                 udelay(1);
 300         }
 301 #ifndef final_version
 302         if (tries != HFA384X_CMD_BUSY_TIMEOUT) {
 303                 prism2_io_debug_error(dev, 1);
 304                 printk(KERN_DEBUG "%s: hfa384x_cmd_issue: cmd reg was busy "
 305                        "for %d usec\n", dev->name,
 306                        HFA384X_CMD_BUSY_TIMEOUT - tries);
 307         }
 308 #endif
 309         if (tries == 0) {
 310                 reg = HFA384X_INW(HFA384X_CMD_OFF);
 311                 prism2_io_debug_error(dev, 2);
 312                 printk(KERN_DEBUG "%s: hfa384x_cmd_issue - timeout - "
 313                        "reg=0x%04x\n", dev->name, reg);
 314                 return -ETIMEDOUT;
 315         }
 316
 317         /* write command */
 318         spin_lock_irqsave(&local->cmdlock, flags);
 319         HFA384X_OUTW(entry->param0, HFA384X_PARAM0_OFF);
 320         HFA384X_OUTW(entry->param1, HFA384X_PARAM1_OFF);
 321         HFA384X_OUTW(entry->cmd, HFA384X_CMD_OFF);
 322         entry->issued = 1;
 323         spin_unlock_irqrestore(&local->cmdlock, flags);
 324
 325         return 0;
 326 }
 327
 328
 329 /**
 330  * hfa384x_cmd - Issue a Prism2 command and wait (sleep) for completion
 331  * @dev: pointer to net_device
 332  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 333  * @param0: value for Param0 register
 334  * @param1: value for Param1 register (pointer; %NULL if not used)
 335  * @resp0: pointer for Resp0 data or %NULL if Resp0 is not needed
 336  *
 337  * Issue given command (possibly after waiting in command queue) and sleep
 338  * until the command is completed (or timed out or interrupted). This can be
 339  * called only from user process context.
 340  */
 341 static int hfa384x_cmd(struct net_device *dev, u16 cmd, u16 param0,
 342                        u16 *param1, u16 *resp0)
 343 {
 344         struct hostap_interface *iface;
 345         local_info_t *local;
 346         int err, res, issue, issued = 0;
 347         unsigned long flags;
 348         struct hostap_cmd_queue *entry;
 349         DECLARE_WAITQUEUE(wait, current);
 350
 351         iface = netdev_priv(dev);
 352         local = iface->local;
 353
 354         if (in_interrupt()) {
 355                 printk(KERN_DEBUG "%s: hfa384x_cmd called from interrupt "
 356                        "context\n", dev->name);
 357                 return -1;
 358         }
 359
 360         if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN) {
 361                 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
 362                        dev->name);
 363                 return -1;
 364         }
 365
 366         if (signal_pending(current))
 367                 return -EINTR;
 368
 369         entry = (struct hostap_cmd_queue *)
 370                 kmalloc(sizeof(*entry), GFP_ATOMIC);
 371         if (entry == NULL) {
 372                 printk(KERN_DEBUG "%s: hfa384x_cmd - kmalloc failed\n",
 373                        dev->name);
 374                 return -ENOMEM;
 375         }
 376         memset(entry, 0, sizeof(*entry));
 377         atomic_set(&entry->usecnt, 1);
 378         entry->type = CMD_SLEEP;
 379         entry->cmd = cmd;
 380         entry->param0 = param0;
 381         if (param1)
 382                 entry->param1 = *param1;
 383         init_waitqueue_head(&entry->compl);
 384
 385         /* prepare to wait for command completion event, but do not sleep yet
 386          */
 387         add_wait_queue(&entry->compl, &wait);
 388         set_current_state(TASK_INTERRUPTIBLE);
 389
 390         spin_lock_irqsave(&local->cmdlock, flags);
 391         issue = list_empty(&local->cmd_queue);
 392         if (issue)
 393                 entry->issuing = 1;
 394         list_add_tail(&entry->list, &local->cmd_queue);
 395         local->cmd_queue_len++;
 396         spin_unlock_irqrestore(&local->cmdlock, flags);
 397
 398         err = 0;
 399         if (!issue)
 400                 goto wait_completion;
 401
 402         if (signal_pending(current))
 403                 err = -EINTR;
 404
 405         if (!err) {
 406                 if (hfa384x_cmd_issue(dev, entry))
 407                         err = -ETIMEDOUT;
 408                 else
 409                         issued = 1;
 410         }
 411
 412  wait_completion:
 413         if (!err && entry->type != CMD_COMPLETED) {
 414                 /* sleep until command is completed or timed out */
 415                 res = schedule_timeout(2 * HZ);
 416         } else
 417                 res = -1;
 418
 419         if (!err && signal_pending(current))
 420                 err = -EINTR;
 421
 422         if (err && issued) {
 423                 /* the command was issued, so a CmdCompl event should occur
 424                  * soon; however, there's a pending signal and
 425                  * schedule_timeout() would be interrupted; wait a short period
 426                  * of time to avoid removing entry from the list before
 427                  * CmdCompl event */
 428                 udelay(300);
 429         }
 430
 431         set_current_state(TASK_RUNNING);
 432         remove_wait_queue(&entry->compl, &wait);
 433
 434         /* If entry->list is still in the list, it must be removed
 435          * first and in this case prism2_cmd_ev() does not yet have
 436          * local reference to it, and the data can be kfree()'d
 437          * here. If the command completion event is still generated,
 438          * it will be assigned to next (possibly) pending command, but
 439          * the driver will reset the card anyway due to timeout
 440          *
 441          * If the entry is not in the list prism2_cmd_ev() has a local
 442          * reference to it, but keeps cmdlock as long as the data is
 443          * needed, so the data can be kfree()'d here. */
 444
 445         /* FIX: if the entry->list is in the list, it has not been completed
 446          * yet, so removing it here is somewhat wrong.. this could cause
 447          * references to freed memory and next list_del() causing NULL pointer
 448          * dereference.. it would probably be better to leave the entry in the
 449          * list and the list should be emptied during hw reset */
 450
 451         spin_lock_irqsave(&local->cmdlock, flags);
 452         if (!list_empty(&entry->list)) {
 453                 printk(KERN_DEBUG "%s: hfa384x_cmd: entry still in list? "
 454                        "(entry=%p, type=%d, res=%d)\n", dev->name, entry,
 455                        entry->type, res);
 456                 list_del_init(&entry->list);
 457                 local->cmd_queue_len--;
 458         }
 459         spin_unlock_irqrestore(&local->cmdlock, flags);
 460
 461         if (err) {
 462                 printk(KERN_DEBUG "%s: hfa384x_cmd: interrupted; err=%d\n",
 463                        dev->name, err);
 464                 res = err;
 465                 goto done;
 466         }
 467
 468         if (entry->type != CMD_COMPLETED) {
 469                 u16 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
 470                 printk(KERN_DEBUG "%s: hfa384x_cmd: command was not "
 471                        "completed (res=%d, entry=%p, type=%d, cmd=0x%04x, "
 472                        "param0=0x%04x, EVSTAT=%04x INTEN=%04x)\n", dev->name,
 473                        res, entry, entry->type, entry->cmd, entry->param0, reg,
 474                        HFA384X_INW(HFA384X_INTEN_OFF));
 475                 if (reg & HFA384X_EV_CMD) {
 476                         /* Command completion event is pending, but the
 477                          * interrupt was not delivered - probably an issue
 478                          * with pcmcia-cs configuration. */
 479                         printk(KERN_WARNING "%s: interrupt delivery does not "
 480                                "seem to work\n", dev->name);
 481                 }
 482                 prism2_io_debug_error(dev, 3);
 483                 res = -ETIMEDOUT;
 484                 goto done;
 485         }
 486
 487         if (resp0 != NULL)
 488                 *resp0 = entry->resp0;
 489 #ifndef final_version
 490         if (entry->res) {
 491                 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x, "
 492                        "resp0=0x%04x\n",
 493                        dev->name, cmd, entry->res, entry->resp0);
 494         }
 495 #endif /* final_version */
 496
 497         res = entry->res;
 498  done:
 499         hostap_cmd_queue_free(local, entry, 1);
 500         return res;
 501 }
 502
 503
 504 /**
 505  * hfa384x_cmd_callback - Issue a Prism2 command; callback when completed
 506  * @dev: pointer to net_device
 507  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 508  * @param0: value for Param0 register
 509  * @callback: command completion callback function (%NULL = no callback)
 510  * @context: data pointer to be given to callback function
 511  *
 512  * Issue given command (possibly after waiting in command queue) and use
 513  * callback function to indicate command completion. This can be called both
 514  * from user and interrupt context. The callback function will be called in
 515  * hardware IRQ context. It can be %NULL, when no function is called when
 516  * command is completed.
 517  */
 518 static int hfa384x_cmd_callback(struct net_device *dev, u16 cmd, u16 param0,
 519                                 void (*callback)(struct net_device *dev,
 520                                                  void *context, u16 resp0,
 521                                                  u16 status),
 522                                 void *context)
 523 {
 524         struct hostap_interface *iface;
 525         local_info_t *local;
 526         int issue, ret;
 527         unsigned long flags;
 528         struct hostap_cmd_queue *entry;
 529
 530         iface = netdev_priv(dev);
 531         local = iface->local;
 532
 533         if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN + 2) {
 534                 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
 535                        dev->name);
 536                 return -1;
 537         }
 538
 539         entry = (struct hostap_cmd_queue *)
 540                 kmalloc(sizeof(*entry), GFP_ATOMIC);
 541         if (entry == NULL) {
 542                 printk(KERN_DEBUG "%s: hfa384x_cmd_callback - kmalloc "
 543                        "failed\n", dev->name);
 544                 return -ENOMEM;
 545         }
 546         memset(entry, 0, sizeof(*entry));
 547         atomic_set(&entry->usecnt, 1);
 548         entry->type = CMD_CALLBACK;
 549         entry->cmd = cmd;
 550         entry->param0 = param0;
 551         entry->callback = callback;
 552         entry->context = context;
 553
 554         spin_lock_irqsave(&local->cmdlock, flags);
 555         issue = list_empty(&local->cmd_queue);
 556         if (issue)
 557                 entry->issuing = 1;
 558         list_add_tail(&entry->list, &local->cmd_queue);
 559         local->cmd_queue_len++;
 560         spin_unlock_irqrestore(&local->cmdlock, flags);
 561
 562         if (issue && hfa384x_cmd_issue(dev, entry))
 563                 ret = -ETIMEDOUT;
 564         else
 565                 ret = 0;
 566
 567         hostap_cmd_queue_free(local, entry, ret);
 568
 569         return ret;
 570 }
 571
 572
 573 /**
 574  * __hfa384x_cmd_no_wait - Issue a Prism2 command (private)
 575  * @dev: pointer to net_device
 576  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 577  * @param0: value for Param0 register
 578  * @io_debug_num: I/O debug error number
 579  *
 580  * Shared helper function for hfa384x_cmd_wait() and hfa384x_cmd_no_wait().
 581  */
 582 static int __hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd, u16 param0,
 583                                  int io_debug_num)
 584 {
 585         int tries;
 586         u16 reg;
 587
 588         /* wait until busy bit is clear; this should always be clear since the
 589          * commands are serialized */
 590         tries = HFA384X_CMD_BUSY_TIMEOUT;
 591         while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
 592                 tries--;
 593                 udelay(1);
 594         }
 595         if (tries == 0) {
 596                 reg = HFA384X_INW(HFA384X_CMD_OFF);
 597                 prism2_io_debug_error(dev, io_debug_num);
 598                 printk(KERN_DEBUG "%s: __hfa384x_cmd_no_wait(%d) - timeout - "
 599                        "reg=0x%04x\n", dev->name, io_debug_num, reg);
 600                 return -ETIMEDOUT;
 601         }
 602
 603         /* write command */
 604         HFA384X_OUTW(param0, HFA384X_PARAM0_OFF);
 605         HFA384X_OUTW(cmd, HFA384X_CMD_OFF);
 606
 607         return 0;
 608 }
 609
 610
 611 /**
 612  * hfa384x_cmd_wait - Issue a Prism2 command and busy wait for completion
 613  * @dev: pointer to net_device
 614  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 615  * @param0: value for Param0 register
 616  */
 617 static int hfa384x_cmd_wait(struct net_device *dev, u16 cmd, u16 param0)
 618 {
 619         int res, tries;
 620         u16 reg;
 621
 622         res = __hfa384x_cmd_no_wait(dev, cmd, param0, 4);
 623         if (res)
 624                 return res;
 625
 626         /* wait for command completion */
 627         if ((cmd & HFA384X_CMDCODE_MASK) == HFA384X_CMDCODE_DOWNLOAD)
 628                 tries = HFA384X_DL_COMPL_TIMEOUT;
 629         else
 630                 tries = HFA384X_CMD_COMPL_TIMEOUT;
 631
 632         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
 633                tries > 0) {
 634                 tries--;
 635                 udelay(10);
 636         }
 637         if (tries == 0) {
 638                 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
 639                 prism2_io_debug_error(dev, 5);
 640                 printk(KERN_DEBUG "%s: hfa384x_cmd_wait - timeout2 - "
 641                        "reg=0x%04x\n", dev->name, reg);
 642                 return -ETIMEDOUT;
 643         }
 644
 645         res = (HFA384X_INW(HFA384X_STATUS_OFF) &
 646                (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) | BIT(9) |
 647                 BIT(8))) >> 8;
 648 #ifndef final_version
 649         if (res) {
 650                 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x\n",
 651                        dev->name, cmd, res);
 652         }
 653 #endif
 654
 655         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
 656
 657         return res;
 658 }
 659
 660
 661 /**
 662  * hfa384x_cmd_no_wait - Issue a Prism2 command; do not wait for completion
 663  * @dev: pointer to net_device
 664  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 665  * @param0: value for Param0 register
 666  */
 667 static inline int hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd,
 668                                       u16 param0)
 669 {
 670         return __hfa384x_cmd_no_wait(dev, cmd, param0, 6);
 671 }
 672
 673
 674 /**
 675  * prism2_cmd_ev - Prism2 command completion event handler
 676  * @dev: pointer to net_device
 677  *
 678  * Interrupt handler for command completion events. Called by the main
 679  * interrupt handler in hardware IRQ context. Read Resp0 and status registers
 680  * from the hardware and ACK the event. Depending on the issued command type
 681  * either wake up the sleeping process that is waiting for command completion
 682  * or call the callback function. Issue the next command, if one is pending.
 683  */
 684 static void prism2_cmd_ev(struct net_device *dev)
 685 {
 686         struct hostap_interface *iface;
 687         local_info_t *local;
 688         struct hostap_cmd_queue *entry = NULL;
 689
 690         iface = netdev_priv(dev);
 691         local = iface->local;
 692
 693         spin_lock(&local->cmdlock);
 694         if (!list_empty(&local->cmd_queue)) {
 695                 entry = list_entry(local->cmd_queue.next,
 696                                    struct hostap_cmd_queue, list);
 697                 atomic_inc(&entry->usecnt);
 698                 list_del_init(&entry->list);
 699                 local->cmd_queue_len--;
 700
 701                 if (!entry->issued) {
 702                         printk(KERN_DEBUG "%s: Command completion event, but "
 703                                "cmd not issued\n", dev->name);
 704                         __hostap_cmd_queue_free(local, entry, 1);
 705                         entry = NULL;
 706                 }
 707         }
 708         spin_unlock(&local->cmdlock);
 709
 710         if (!entry) {
 711                 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
 712                 printk(KERN_DEBUG "%s: Command completion event, but no "
 713                        "pending commands\n", dev->name);
 714                 return;
 715         }
 716
 717         entry->resp0 = HFA384X_INW(HFA384X_RESP0_OFF);
 718         entry->res = (HFA384X_INW(HFA384X_STATUS_OFF) &
 719                       (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) |
 720                        BIT(9) | BIT(8))) >> 8;
 721         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
 722
 723         /* TODO: rest of the CmdEv handling could be moved to tasklet */
 724         if (entry->type == CMD_SLEEP) {
 725                 entry->type = CMD_COMPLETED;
 726                 wake_up_interruptible(&entry->compl);
 727         } else if (entry->type == CMD_CALLBACK) {
 728                 if (entry->callback)
 729                         entry->callback(dev, entry->context, entry->resp0,
 730                                         entry->res);
 731         } else {
 732                 printk(KERN_DEBUG "%s: Invalid command completion type %d\n",
 733                        dev->name, entry->type);
 734         }
 735         hostap_cmd_queue_free(local, entry, 1);
 736
 737         /* issue next command, if pending */
 738         entry = NULL;
 739         spin_lock(&local->cmdlock);
 740         if (!list_empty(&local->cmd_queue)) {
 741                 entry = list_entry(local->cmd_queue.next,
 742                                    struct hostap_cmd_queue, list);
 743                 if (entry->issuing) {
 744                         /* hfa384x_cmd() has already started issuing this
 745                          * command, so do not start here */
 746                         entry = NULL;
 747                 }
 748                 if (entry)
 749                         atomic_inc(&entry->usecnt);
 750         }
 751         spin_unlock(&local->cmdlock);
 752
 753         if (entry) {
 754                 /* issue next command; if command issuing fails, remove the
 755                  * entry from cmd_queue */
 756                 int res = hfa384x_cmd_issue(dev, entry);
 757                 spin_lock(&local->cmdlock);
 758                 __hostap_cmd_queue_free(local, entry, res);
 759                 spin_unlock(&local->cmdlock);
 760         }
 761 }
 762
 763
 764 static inline int hfa384x_wait_offset(struct net_device *dev, u16 o_off)
 765 {
 766         int tries = HFA384X_BAP_BUSY_TIMEOUT;
 767         int res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
 768
 769         while (res && tries > 0) {
 770                 tries--;
 771                 udelay(1);
 772                 res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
 773         }
 774         return res;
 775 }
 776
 777
 778 /* Offset must be even */
 779 static int hfa384x_setup_bap(struct net_device *dev, u16 bap, u16 id,
 780                              int offset)
 781 {
 782         u16 o_off, s_off;
 783         int ret = 0;
 784
 785         if (offset % 2 || bap > 1)
 786                 return -EINVAL;
 787
 788         if (bap == BAP1) {
 789                 o_off = HFA384X_OFFSET1_OFF;
 790                 s_off = HFA384X_SELECT1_OFF;
 791         } else {
 792                 o_off = HFA384X_OFFSET0_OFF;
 793                 s_off = HFA384X_SELECT0_OFF;
 794         }
 795
 796         if (hfa384x_wait_offset(dev, o_off)) {
 797                 prism2_io_debug_error(dev, 7);
 798                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout before\n",
 799                        dev->name);
 800                 ret = -ETIMEDOUT;
 801                 goto out;
 802         }
 803
 804         HFA384X_OUTW(id, s_off);
 805         HFA384X_OUTW(offset, o_off);
 806
 807         if (hfa384x_wait_offset(dev, o_off)) {
 808                 prism2_io_debug_error(dev, 8);
 809                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout after\n",
 810                        dev->name);
 811                 ret = -ETIMEDOUT;
 812                 goto out;
 813         }
 814 #ifndef final_version
 815         if (HFA384X_INW(o_off) & HFA384X_OFFSET_ERR) {
 816                 prism2_io_debug_error(dev, 9);
 817                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - offset error "
 818                        "(%d,0x04%x,%d); reg=0x%04x\n",
 819                        dev->name, bap, id, offset, HFA384X_INW(o_off));
 820                 ret = -EINVAL;
 821         }
 822 #endif
 823
 824  out:
 825         return ret;
 826 }
 827
 828
 829 static int hfa384x_get_rid(struct net_device *dev, u16 rid, void *buf, int len,
 830                            int exact_len)
 831 {
 832         struct hostap_interface *iface;
 833         local_info_t *local;
 834         int res, rlen = 0;
 835         struct hfa384x_rid_hdr rec;
 836
 837         iface = netdev_priv(dev);
 838         local = iface->local;
 839
 840         if (local->no_pri) {
 841                 printk(KERN_DEBUG "%s: cannot get RID %04x (len=%d) - no PRI "
 842                        "f/w\n", dev->name, rid, len);
 843                 return -ENOTTY; /* Well.. not really correct, but return
 844                                  * something unique enough.. */
 845         }
 846
 847         if ((local->func->card_present && !local->func->card_present(local)) ||
 848             local->hw_downloading)
 849                 return -ENODEV;
 850
 851         res = down_interruptible(&local->rid_bap_sem);
 852         if (res)
 853                 return res;
 854
 855         res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS, rid, NULL, NULL);
 856         if (res) {
 857                 printk(KERN_DEBUG "%s: hfa384x_get_rid: CMDCODE_ACCESS failed "
 858                        "(res=%d, rid=%04x, len=%d)\n",
 859                        dev->name, res, rid, len);
 860                 up(&local->rid_bap_sem);
 861                 return res;
 862         }
 863
 864         spin_lock_bh(&local->baplock);
 865
 866         res = hfa384x_setup_bap(dev, BAP0, rid, 0);
 867         if (!res)
 868                 res = hfa384x_from_bap(dev, BAP0, &rec, sizeof(rec));
 869
 870         if (le16_to_cpu(rec.len) == 0) {
 871                 /* RID not available */
 872                 res = -ENODATA;
 873         }
 874
 875         rlen = (le16_to_cpu(rec.len) - 1) * 2;
 876         if (!res && exact_len && rlen != len) {
 877                 printk(KERN_DEBUG "%s: hfa384x_get_rid - RID len mismatch: "
 878                        "rid=0x%04x, len=%d (expected %d)\n",
 879                        dev->name, rid, rlen, len);
 880                 res = -ENODATA;
 881         }
 882
 883         if (!res)
 884                 res = hfa384x_from_bap(dev, BAP0, buf, len);
 885
 886         spin_unlock_bh(&local->baplock);
 887         up(&local->rid_bap_sem);
 888
 889         if (res) {
 890                 if (res != -ENODATA)
 891                         printk(KERN_DEBUG "%s: hfa384x_get_rid (rid=%04x, "
 892                                "len=%d) - failed - res=%d\n", dev->name, rid,
 893                                len, res);
 894                 if (res == -ETIMEDOUT)
 895                         prism2_hw_reset(dev);
 896                 return res;
 897         }
 898
 899         return rlen;
 900 }
 901
 902
 903 static int hfa384x_set_rid(struct net_device *dev, u16 rid, void *buf, int len)
 904 {
 905         struct hostap_interface *iface;
 906         local_info_t *local;
 907         struct hfa384x_rid_hdr rec;
 908         int res;
 909
 910         iface = netdev_priv(dev);
 911         local = iface->local;
 912
 913         if (local->no_pri) {
 914                 printk(KERN_DEBUG "%s: cannot set RID %04x (len=%d) - no PRI "
 915                        "f/w\n", dev->name, rid, len);
 916                 return -ENOTTY; /* Well.. not really correct, but return
 917                                  * something unique enough.. */
 918         }
 919
 920         if ((local->func->card_present && !local->func->card_present(local)) ||
 921             local->hw_downloading)
 922                 return -ENODEV;
 923
 924         rec.rid = cpu_to_le16(rid);
 925         /* RID len in words and +1 for rec.rid */
 926         rec.len = cpu_to_le16(len / 2 + len % 2 + 1);
 927
 928         res = down_interruptible(&local->rid_bap_sem);
 929         if (res)
 930                 return res;
 931
 932         spin_lock_bh(&local->baplock);
 933         res = hfa384x_setup_bap(dev, BAP0, rid, 0);
 934         if (!res)
 935                 res = hfa384x_to_bap(dev, BAP0, &rec, sizeof(rec));
 936         if (!res)
 937                 res = hfa384x_to_bap(dev, BAP0, buf, len);
 938         spin_unlock_bh(&local->baplock);
 939
 940         if (res) {
 941                 printk(KERN_DEBUG "%s: hfa384x_set_rid (rid=%04x, len=%d) - "
 942                        "failed - res=%d\n", dev->name, rid, len, res);
 943                 up(&local->rid_bap_sem);
 944                 return res;
 945         }
 946
 947         res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS_WRITE, rid, NULL, NULL);
 948         up(&local->rid_bap_sem);
 949         if (res) {
 950                 printk(KERN_DEBUG "%s: hfa384x_set_rid: CMDCODE_ACCESS_WRITE "
 951                        "failed (res=%d, rid=%04x, len=%d)\n",
 952                        dev->name, res, rid, len);
 953                 return res;
 954         }
 955
 956         if (res == -ETIMEDOUT)
 957                 prism2_hw_reset(dev);
 958
 959         return res;
 960 }
 961
 962
 963 static void hfa384x_disable_interrupts(struct net_device *dev)
 964 {
 965         /* disable interrupts and clear event status */
 966         HFA384X_OUTW(0, HFA384X_INTEN_OFF);
 967         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
 968 }
 969
 970
 971 static void hfa384x_enable_interrupts(struct net_device *dev)
 972 {
 973         /* ack pending events and enable interrupts from selected events */
 974         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
 975         HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
 976 }
 977
 978
 979 static void hfa384x_events_no_bap0(struct net_device *dev)
 980 {
 981         HFA384X_OUTW(HFA384X_EVENT_MASK & ~HFA384X_BAP0_EVENTS,
 982                      HFA384X_INTEN_OFF);
 983 }
 984
 985
 986 static void hfa384x_events_all(struct net_device *dev)
 987 {
 988         HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
 989 }
 990
 991
 992 static void hfa384x_events_only_cmd(struct net_device *dev)
 993 {
 994         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_INTEN_OFF);
 995 }
 996
 997
 998 static u16 hfa384x_allocate_fid(struct net_device *dev, int len)
 999 {
1000         u16 fid;
1001         unsigned long delay;
1002
1003         /* FIX: this could be replace with hfa384x_cmd() if the Alloc event
1004          * below would be handled like CmdCompl event (sleep here, wake up from
1005          * interrupt handler */
1006         if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_ALLOC, len)) {
1007                 printk(KERN_DEBUG "%s: cannot allocate fid, len=%d\n",
1008                        dev->name, len);
1009                 return 0xffff;
1010         }
1011
1012         delay = jiffies + HFA384X_ALLOC_COMPL_TIMEOUT;
1013         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC) &&
1014                time_before(jiffies, delay))
1015                 yield();
1016         if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC)) {
1017                 printk("%s: fid allocate, len=%d - timeout\n", dev->name, len);
1018                 return 0xffff;
1019         }
1020
1021         fid = HFA384X_INW(HFA384X_ALLOCFID_OFF);
1022         HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
1023
1024         return fid;
1025 }
1026
1027
1028 static int prism2_reset_port(struct net_device *dev)
1029 {
1030         struct hostap_interface *iface;
1031         local_info_t *local;
1032         int res;
1033
1034         iface = netdev_priv(dev);
1035         local = iface->local;
1036
1037         if (!local->dev_enabled)
1038                 return 0;
1039
1040         res = hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0,
1041                           NULL, NULL);
1042         if (res)
1043                 printk(KERN_DEBUG "%s: reset port failed to disable port\n",
1044                        dev->name);
1045         else {
1046                 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0,
1047                                   NULL, NULL);
1048                 if (res)
1049                         printk(KERN_DEBUG "%s: reset port failed to enable "
1050                                "port\n", dev->name);
1051         }
1052
1053         /* It looks like at least some STA firmware versions reset
1054          * fragmentation threshold back to 2346 after enable command. Restore
1055          * the configured value, if it differs from this default. */
1056         if (local->fragm_threshold != 2346 &&
1057             hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1058                             local->fragm_threshold)) {
1059                 printk(KERN_DEBUG "%s: failed to restore fragmentation "
1060                        "threshold (%d) after Port0 enable\n",
1061                        dev->name, local->fragm_threshold);
1062         }
1063
1064         return res;
1065 }
1066
1067
1068 static int prism2_get_version_info(struct net_device *dev, u16 rid,
1069                                    const char *txt)
1070 {
1071         struct hfa384x_comp_ident comp;
1072         struct hostap_interface *iface;
1073         local_info_t *local;
1074
1075         iface = netdev_priv(dev);
1076         local = iface->local;
1077
1078         if (local->no_pri) {
1079                 /* PRI f/w not yet available - cannot read RIDs */
1080                 return -1;
1081         }
1082         if (hfa384x_get_rid(dev, rid, &comp, sizeof(comp), 1) < 0) {
1083                 printk(KERN_DEBUG "Could not get RID for component %s\n", txt);
1084                 return -1;
1085         }
1086
1087         printk(KERN_INFO "%s: %s: id=0x%02x v%d.%d.%d\n", dev->name, txt,
1088                __le16_to_cpu(comp.id), __le16_to_cpu(comp.major),
1089                __le16_to_cpu(comp.minor), __le16_to_cpu(comp.variant));
1090         return 0;
1091 }
1092
1093
1094 static int prism2_setup_rids(struct net_device *dev)
1095 {
1096         struct hostap_interface *iface;
1097         local_info_t *local;
1098         u16 tmp;
1099         int ret = 0;
1100
1101         iface = netdev_priv(dev);
1102         local = iface->local;
1103
1104         hostap_set_word(dev, HFA384X_RID_TICKTIME, 2000);
1105
1106         if (!local->fw_ap) {
1107                 tmp = hostap_get_porttype(local);
1108                 ret = hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE, tmp);
1109                 if (ret) {
1110                         printk("%s: Port type setting to %d failed\n",
1111                                dev->name, tmp);
1112                         goto fail;
1113                 }
1114         }
1115
1116         /* Setting SSID to empty string seems to kill the card in Host AP mode
1117          */
1118         if (local->iw_mode != IW_MODE_MASTER || local->essid[0] != '\0') {
1119                 ret = hostap_set_string(dev, HFA384X_RID_CNFOWNSSID,
1120                                         local->essid);
1121                 if (ret) {
1122                         printk("%s: AP own SSID setting failed\n", dev->name);
1123                         goto fail;
1124                 }
1125         }
1126
1127         ret = hostap_set_word(dev, HFA384X_RID_CNFMAXDATALEN,
1128                               PRISM2_DATA_MAXLEN);
1129         if (ret) {
1130                 printk("%s: MAC data length setting to %d failed\n",
1131                        dev->name, PRISM2_DATA_MAXLEN);
1132                 goto fail;
1133         }
1134
1135         if (hfa384x_get_rid(dev, HFA384X_RID_CHANNELLIST, &tmp, 2, 1) < 0) {
1136                 printk("%s: Channel list read failed\n", dev->name);
1137                 ret = -EINVAL;
1138                 goto fail;
1139         }
1140         local->channel_mask = __le16_to_cpu(tmp);
1141
1142         if (local->channel < 1 || local->channel > 14 ||
1143             !(local->channel_mask & (1 << (local->channel - 1)))) {
1144                 printk(KERN_WARNING "%s: Channel setting out of range "
1145                        "(%d)!\n", dev->name, local->channel);
1146                 ret = -EBUSY;
1147                 goto fail;
1148         }
1149
1150         ret = hostap_set_word(dev, HFA384X_RID_CNFOWNCHANNEL, local->channel);
1151         if (ret) {
1152                 printk("%s: Channel setting to %d failed\n",
1153                        dev->name, local->channel);
1154                 goto fail;
1155         }
1156
1157         ret = hostap_set_word(dev, HFA384X_RID_CNFBEACONINT,
1158                               local->beacon_int);
1159         if (ret) {
1160                 printk("%s: Beacon interval setting to %d failed\n",
1161                        dev->name, local->beacon_int);
1162                 /* this may fail with Symbol/Lucent firmware */
1163                 if (ret == -ETIMEDOUT)
1164                         goto fail;
1165         }
1166
1167         ret = hostap_set_word(dev, HFA384X_RID_CNFOWNDTIMPERIOD,
1168                               local->dtim_period);
1169         if (ret) {
1170                 printk("%s: DTIM period setting to %d failed\n",
1171                        dev->name, local->dtim_period);
1172                 /* this may fail with Symbol/Lucent firmware */
1173                 if (ret == -ETIMEDOUT)
1174                         goto fail;
1175         }
1176
1177         ret = hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
1178                               local->is_promisc);
1179         if (ret)
1180                 printk(KERN_INFO "%s: Setting promiscuous mode (%d) failed\n",
1181                        dev->name, local->is_promisc);
1182
1183         if (!local->fw_ap) {
1184                 ret = hostap_set_string(dev, HFA384X_RID_CNFDESIREDSSID,
1185                                         local->essid);
1186                 if (ret) {
1187                         printk("%s: Desired SSID setting failed\n", dev->name);
1188                         goto fail;
1189                 }
1190         }
1191
1192         /* Setup TXRateControl, defaults to allow use of 1, 2, 5.5, and
1193          * 11 Mbps in automatic TX rate fallback and 1 and 2 Mbps as basic
1194          * rates */
1195         if (local->tx_rate_control == 0) {
1196                 local->tx_rate_control =
1197                         HFA384X_RATES_1MBPS |
1198                         HFA384X_RATES_2MBPS |
1199                         HFA384X_RATES_5MBPS |
1200                         HFA384X_RATES_11MBPS;
1201         }
1202         if (local->basic_rates == 0)
1203                 local->basic_rates = HFA384X_RATES_1MBPS | HFA384X_RATES_2MBPS;
1204
1205         if (!local->fw_ap) {
1206                 ret = hostap_set_word(dev, HFA384X_RID_TXRATECONTROL,
1207                                       local->tx_rate_control);
1208                 if (ret) {
1209                         printk("%s: TXRateControl setting to %d failed\n",
1210                                dev->name, local->tx_rate_control);
1211                         goto fail;
1212                 }
1213
1214                 ret = hostap_set_word(dev, HFA384X_RID_CNFSUPPORTEDRATES,
1215                                       local->tx_rate_control);
1216                 if (ret) {
1217                         printk("%s: cnfSupportedRates setting to %d failed\n",
1218                                dev->name, local->tx_rate_control);
1219                 }
1220
1221                 ret = hostap_set_word(dev, HFA384X_RID_CNFBASICRATES,
1222                                       local->basic_rates);
1223                 if (ret) {
1224                         printk("%s: cnfBasicRates setting to %d failed\n",
1225                                dev->name, local->basic_rates);
1226                 }
1227
1228                 ret = hostap_set_word(dev, HFA384X_RID_CREATEIBSS, 1);
1229                 if (ret) {
1230                         printk("%s: Create IBSS setting to 1 failed\n",
1231                                dev->name);
1232                 }
1233         }
1234
1235         if (local->name_set)
1236                 (void) hostap_set_string(dev, HFA384X_RID_CNFOWNNAME,
1237                                          local->name);
1238
1239         if (hostap_set_encryption(local)) {
1240                 printk(KERN_INFO "%s: could not configure encryption\n",
1241                        dev->name);
1242         }
1243
1244         (void) hostap_set_antsel(local);
1245
1246         if (hostap_set_roaming(local)) {
1247                 printk(KERN_INFO "%s: could not set host roaming\n",
1248                        dev->name);
1249         }
1250
1251         if (local->sta_fw_ver >= PRISM2_FW_VER(1,6,3) &&
1252             hostap_set_word(dev, HFA384X_RID_CNFENHSECURITY, local->enh_sec))
1253                 printk(KERN_INFO "%s: cnfEnhSecurity setting to 0x%x failed\n",
1254                        dev->name, local->enh_sec);
1255
1256         /* 32-bit tallies were added in STA f/w 0.8.0, but they were apparently
1257          * not working correctly (last seven counters report bogus values).
1258          * This has been fixed in 0.8.2, so enable 32-bit tallies only
1259          * beginning with that firmware version. Another bug fix for 32-bit
1260          * tallies in 1.4.0; should 16-bit tallies be used for some other
1261          * versions, too? */
1262         if (local->sta_fw_ver >= PRISM2_FW_VER(0,8,2)) {
1263                 if (hostap_set_word(dev, HFA384X_RID_CNFTHIRTY2TALLY, 1)) {
1264                         printk(KERN_INFO "%s: cnfThirty2Tally setting "
1265                                "failed\n", dev->name);
1266                         local->tallies32 = 0;
1267                 } else
1268                         local->tallies32 = 1;
1269         } else
1270                 local->tallies32 = 0;
1271
1272         hostap_set_auth_algs(local);
1273
1274         if (hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1275                             local->fragm_threshold)) {
1276                 printk(KERN_INFO "%s: setting FragmentationThreshold to %d "
1277                        "failed\n", dev->name, local->fragm_threshold);
1278         }
1279
1280         if (hostap_set_word(dev, HFA384X_RID_RTSTHRESHOLD,
1281                             local->rts_threshold)) {
1282                 printk(KERN_INFO "%s: setting RTSThreshold to %d failed\n",
1283                        dev->name, local->rts_threshold);
1284         }
1285
1286         if (local->manual_retry_count >= 0 &&
1287             hostap_set_word(dev, HFA384X_RID_CNFALTRETRYCOUNT,
1288                             local->manual_retry_count)) {
1289                 printk(KERN_INFO "%s: setting cnfAltRetryCount to %d failed\n",
1290                        dev->name, local->manual_retry_count);
1291         }
1292
1293         if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1) &&
1294             hfa384x_get_rid(dev, HFA384X_RID_CNFDBMADJUST, &tmp, 2, 1) == 2) {
1295                 local->rssi_to_dBm = le16_to_cpu(tmp);
1296         }
1297
1298         if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->wpa &&
1299             hostap_set_word(dev, HFA384X_RID_SSNHANDLINGMODE, 1)) {
1300                 printk(KERN_INFO "%s: setting ssnHandlingMode to 1 failed\n",
1301                        dev->name);
1302         }
1303
1304         if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->generic_elem &&
1305             hfa384x_set_rid(dev, HFA384X_RID_GENERICELEMENT,
1306                             local->generic_elem, local->generic_elem_len)) {
1307                 printk(KERN_INFO "%s: setting genericElement failed\n",
1308                        dev->name);
1309         }
1310
1311  fail:
1312         return ret;
1313 }
1314
1315
1316 static int prism2_hw_init(struct net_device *dev, int initial)
1317 {
1318         struct hostap_interface *iface;
1319         local_info_t *local;
1320         int ret, first = 1;
1321         unsigned long start, delay;
1322
1323         PDEBUG(DEBUG_FLOW, "prism2_hw_init()\n");
1324
1325         iface = netdev_priv(dev);
1326         local = iface->local;
1327
1328         clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits);
1329
1330  init:
1331         /* initialize HFA 384x */
1332         ret = hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_INIT, 0);
1333         if (ret) {
1334                 printk(KERN_INFO "%s: first command failed - assuming card "
1335                        "does not have primary firmware\n", dev_info);
1336         }
1337
1338         if (first && (HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1339                 /* EvStat has Cmd bit set in some cases, so retry once if no
1340                  * wait was needed */
1341                 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1342                 printk(KERN_DEBUG "%s: init command completed too quickly - "
1343                        "retrying\n", dev->name);
1344                 first = 0;
1345                 goto init;
1346         }
1347
1348         start = jiffies;
1349         delay = jiffies + HFA384X_INIT_TIMEOUT;
1350         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
1351                time_before(jiffies, delay))
1352                 yield();
1353         if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1354                 printk(KERN_DEBUG "%s: assuming no Primary image in "
1355                        "flash - card initialization not completed\n",
1356                        dev_info);
1357                 local->no_pri = 1;
1358 #ifdef PRISM2_DOWNLOAD_SUPPORT
1359                         if (local->sram_type == -1)
1360                                 local->sram_type = prism2_get_ram_size(local);
1361 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1362                 return 1;
1363         }
1364         local->no_pri = 0;
1365         printk(KERN_DEBUG "prism2_hw_init: initialized in %lu ms\n",
1366                (jiffies - start) * 1000 / HZ);
1367         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1368         return 0;
1369 }
1370
1371
1372 static int prism2_hw_init2(struct net_device *dev, int initial)
1373 {
1374         struct hostap_interface *iface;
1375         local_info_t *local;
1376         int i;
1377
1378         iface = netdev_priv(dev);
1379         local = iface->local;
1380
1381 #ifdef PRISM2_DOWNLOAD_SUPPORT
1382         kfree(local->pda);
1383         if (local->no_pri)
1384                 local->pda = NULL;
1385         else
1386                 local->pda = prism2_read_pda(dev);
1387 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1388
1389         hfa384x_disable_interrupts(dev);
1390
1391 #ifndef final_version
1392         HFA384X_OUTW(HFA384X_MAGIC, HFA384X_SWSUPPORT0_OFF);
1393         if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
1394                 printk("SWSUPPORT0 write/read failed: %04X != %04X\n",
1395                        HFA384X_INW(HFA384X_SWSUPPORT0_OFF), HFA384X_MAGIC);
1396                 goto failed;
1397         }
1398 #endif
1399
1400         if (initial || local->pri_only) {
1401                 hfa384x_events_only_cmd(dev);
1402                 /* get card version information */
1403                 if (prism2_get_version_info(dev, HFA384X_RID_NICID, "NIC") ||
1404                     prism2_get_version_info(dev, HFA384X_RID_PRIID, "PRI")) {
1405                         hfa384x_disable_interrupts(dev);
1406                         goto failed;
1407                 }
1408
1409                 if (prism2_get_version_info(dev, HFA384X_RID_STAID, "STA")) {
1410                         printk(KERN_DEBUG "%s: Failed to read STA f/w version "
1411                                "- only Primary f/w present\n", dev->name);
1412                         local->pri_only = 1;
1413                         return 0;
1414                 }
1415                 local->pri_only = 0;
1416                 hfa384x_disable_interrupts(dev);
1417         }
1418
1419         /* FIX: could convert allocate_fid to use sleeping CmdCompl wait and
1420          * enable interrupts before this. This would also require some sort of
1421          * sleeping AllocEv waiting */
1422
1423         /* allocate TX FIDs */
1424         local->txfid_len = PRISM2_TXFID_LEN;
1425         for (i = 0; i < PRISM2_TXFID_COUNT; i++) {
1426                 local->txfid[i] = hfa384x_allocate_fid(dev, local->txfid_len);
1427                 if (local->txfid[i] == 0xffff && local->txfid_len > 1600) {
1428                         local->txfid[i] = hfa384x_allocate_fid(dev, 1600);
1429                         if (local->txfid[i] != 0xffff) {
1430                                 printk(KERN_DEBUG "%s: Using shorter TX FID "
1431                                        "(1600 bytes)\n", dev->name);
1432                                 local->txfid_len = 1600;
1433                         }
1434                 }
1435                 if (local->txfid[i] == 0xffff)
1436                         goto failed;
1437                 local->intransmitfid[i] = PRISM2_TXFID_EMPTY;
1438         }
1439
1440         hfa384x_events_only_cmd(dev);
1441
1442         if (initial) {
1443                 struct list_head *ptr;
1444                 prism2_check_sta_fw_version(local);
1445
1446                 if (hfa384x_get_rid(dev, HFA384X_RID_CNFOWNMACADDR,
1447                                     &dev->dev_addr, 6, 1) < 0) {
1448                         printk("%s: could not get own MAC address\n",
1449                                dev->name);
1450                 }
1451                 list_for_each(ptr, &local->hostap_interfaces) {
1452                         iface = list_entry(ptr, struct hostap_interface, list);
1453                         memcpy(iface->dev->dev_addr, dev->dev_addr, ETH_ALEN);
1454                 }
1455         } else if (local->fw_ap)
1456                 prism2_check_sta_fw_version(local);
1457
1458         prism2_setup_rids(dev);
1459
1460         /* MAC is now configured, but port 0 is not yet enabled */
1461         return 0;
1462
1463  failed:
1464         if (!local->no_pri)
1465                 printk(KERN_WARNING "%s: Initialization failed\n", dev_info);
1466         return 1;
1467 }
1468
1469
1470 static int prism2_hw_enable(struct net_device *dev, int initial)
1471 {
1472         struct hostap_interface *iface;
1473         local_info_t *local;
1474         int was_resetting;
1475
1476         iface = netdev_priv(dev);
1477         local = iface->local;
1478         was_resetting = local->hw_resetting;
1479
1480         if (hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL)) {
1481                 printk("%s: MAC port 0 enabling failed\n", dev->name);
1482                 return 1;
1483         }
1484
1485         local->hw_ready = 1;
1486         local->hw_reset_tries = 0;
1487         local->hw_resetting = 0;
1488         hfa384x_enable_interrupts(dev);
1489
1490         /* at least D-Link DWL-650 seems to require additional port reset
1491          * before it starts acting as an AP, so reset port automatically
1492          * here just in case */
1493         if (initial && prism2_reset_port(dev)) {
1494                 printk("%s: MAC port 0 reseting failed\n", dev->name);
1495                 return 1;
1496         }
1497
1498         if (was_resetting && netif_queue_stopped(dev)) {
1499                 /* If hw_reset() was called during pending transmit, netif
1500                  * queue was stopped. Wake it up now since the wlan card has
1501                  * been resetted. */
1502                 netif_wake_queue(dev);
1503         }
1504
1505         return 0;
1506 }
1507
1508
1509 static int prism2_hw_config(struct net_device *dev, int initial)
1510 {
1511         struct hostap_interface *iface;
1512         local_info_t *local;
1513
1514         iface = netdev_priv(dev);
1515         local = iface->local;
1516
1517         if (local->hw_downloading)
1518                 return 1;
1519
1520         if (prism2_hw_init(dev, initial)) {
1521                 return local->no_pri ? 0 : 1;
1522         }
1523
1524         if (prism2_hw_init2(dev, initial))
1525                 return 1;
1526
1527         /* Enable firmware if secondary image is loaded and at least one of the
1528          * netdevices is up. */
1529         if (!local->pri_only &&
1530             (initial == 0 || (initial == 2 && local->num_dev_open > 0))) {
1531                 if (!local->dev_enabled)
1532                         prism2_callback(local, PRISM2_CALLBACK_ENABLE);
1533                 local->dev_enabled = 1;
1534                 return prism2_hw_enable(dev, initial);
1535         }
1536
1537         return 0;
1538 }
1539
1540
1541 static void prism2_hw_shutdown(struct net_device *dev, int no_disable)
1542 {
1543         struct hostap_interface *iface;
1544         local_info_t *local;
1545
1546         iface = netdev_priv(dev);
1547         local = iface->local;
1548
1549         /* Allow only command completion events during disable */
1550         hfa384x_events_only_cmd(dev);
1551
1552         local->hw_ready = 0;
1553         if (local->dev_enabled)
1554                 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
1555         local->dev_enabled = 0;
1556
1557         if (local->func->card_present && !local->func->card_present(local)) {
1558                 printk(KERN_DEBUG "%s: card already removed or not configured "
1559                        "during shutdown\n", dev->name);
1560                 return;
1561         }
1562
1563         if ((no_disable & HOSTAP_HW_NO_DISABLE) == 0 &&
1564             hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL))
1565                 printk(KERN_WARNING "%s: Shutdown failed\n", dev_info);
1566
1567         hfa384x_disable_interrupts(dev);
1568
1569         if (no_disable & HOSTAP_HW_ENABLE_CMDCOMPL)
1570                 hfa384x_events_only_cmd(dev);
1571         else
1572                 prism2_clear_cmd_queue(local);
1573 }
1574
1575
1576 static void prism2_hw_reset(struct net_device *dev)
1577 {
1578         struct hostap_interface *iface;
1579         local_info_t *local;
1580
1581 #if 0
1582         static long last_reset = 0;
1583
1584         /* do not reset card more than once per second to avoid ending up in a
1585          * busy loop reseting the card */
1586         if (time_before_eq(jiffies, last_reset + HZ))
1587                 return;
1588         last_reset = jiffies;
1589 #endif
1590
1591         iface = netdev_priv(dev);
1592         local = iface->local;
1593
1594         if (in_interrupt()) {
1595                 printk(KERN_DEBUG "%s: driver bug - prism2_hw_reset() called "
1596                        "in interrupt context\n", dev->name);
1597                 return;
1598         }
1599
1600         if (local->hw_downloading)
1601                 return;
1602
1603         if (local->hw_resetting) {
1604                 printk(KERN_WARNING "%s: %s: already resetting card - "
1605                        "ignoring reset request\n", dev_info, dev->name);
1606                 return;
1607         }
1608
1609         local->hw_reset_tries++;
1610         if (local->hw_reset_tries > 10) {
1611                 printk(KERN_WARNING "%s: too many reset tries, skipping\n",
1612                        dev->name);
1613                 return;
1614         }
1615
1616         printk(KERN_WARNING "%s: %s: resetting card\n", dev_info, dev->name);
1617         hfa384x_disable_interrupts(dev);
1618         local->hw_resetting = 1;
1619         if (local->func->cor_sreset) {
1620                 /* Host system seems to hang in some cases with high traffic
1621                  * load or shared interrupts during COR sreset. Disable shared
1622                  * interrupts during reset to avoid these crashes. COS sreset
1623                  * takes quite a long time, so it is unfortunate that this
1624                  * seems to be needed. Anyway, I do not know of any better way
1625                  * of avoiding the crash. */
1626                 disable_irq(dev->irq);
1627                 local->func->cor_sreset(local);
1628                 enable_irq(dev->irq);
1629         }
1630         prism2_hw_shutdown(dev, 1);
1631         prism2_hw_config(dev, 0);
1632         local->hw_resetting = 0;
1633
1634 #ifdef PRISM2_DOWNLOAD_SUPPORT
1635         if (local->dl_pri) {
1636                 printk(KERN_DEBUG "%s: persistent download of primary "
1637                        "firmware\n", dev->name);
1638                 if (prism2_download_genesis(local, local->dl_pri) < 0)
1639                         printk(KERN_WARNING "%s: download (PRI) failed\n",
1640                                dev->name);
1641         }
1642
1643         if (local->dl_sec) {
1644                 printk(KERN_DEBUG "%s: persistent download of secondary "
1645                        "firmware\n", dev->name);
1646                 if (prism2_download_volatile(local, local->dl_sec) < 0)
1647                         printk(KERN_WARNING "%s: download (SEC) failed\n",
1648                                dev->name);
1649         }
1650 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1651
1652         /* TODO: restore beacon TIM bits for STAs that have buffered frames */
1653 }
1654
1655
1656 static void prism2_schedule_reset(local_info_t *local)
1657 {
1658         schedule_work(&local->reset_queue);
1659 }
1660
1661
1662 /* Called only as scheduled task after noticing card timeout in interrupt
1663  * context */
1664 static void handle_reset_queue(void *data)
1665 {
1666         local_info_t *local = (local_info_t *) data;
1667
1668         printk(KERN_DEBUG "%s: scheduled card reset\n", local->dev->name);
1669         prism2_hw_reset(local->dev);
1670
1671         if (netif_queue_stopped(local->dev)) {
1672                 int i;
1673
1674                 for (i = 0; i < PRISM2_TXFID_COUNT; i++)
1675                         if (local->intransmitfid[i] == PRISM2_TXFID_EMPTY) {
1676                                 PDEBUG(DEBUG_EXTRA, "prism2_tx_timeout: "
1677                                        "wake up queue\n");
1678                                 netif_wake_queue(local->dev);
1679                                 break;
1680                         }
1681         }
1682 }
1683
1684
1685 static int prism2_get_txfid_idx(local_info_t *local)
1686 {
1687         int idx, end;
1688         unsigned long flags;
1689
1690         spin_lock_irqsave(&local->txfidlock, flags);
1691         end = idx = local->next_txfid;
1692         do {
1693                 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1694                         local->intransmitfid[idx] = PRISM2_TXFID_RESERVED;
1695                         spin_unlock_irqrestore(&local->txfidlock, flags);
1696                         return idx;
1697                 }
1698                 idx++;
1699                 if (idx >= PRISM2_TXFID_COUNT)
1700                         idx = 0;
1701         } while (idx != end);
1702         spin_unlock_irqrestore(&local->txfidlock, flags);
1703
1704         PDEBUG(DEBUG_EXTRA2, "prism2_get_txfid_idx: no room in txfid buf: "
1705                "packet dropped\n");
1706         local->stats.tx_dropped++;
1707
1708         return -1;
1709 }
1710
1711
1712 /* Called only from hardware IRQ */
1713 static void prism2_transmit_cb(struct net_device *dev, void *context,
1714                                u16 resp0, u16 res)
1715 {
1716         struct hostap_interface *iface;
1717         local_info_t *local;
1718         int idx = (int) context;
1719
1720         iface = netdev_priv(dev);
1721         local = iface->local;
1722
1723         if (res) {
1724                 printk(KERN_DEBUG "%s: prism2_transmit_cb - res=0x%02x\n",
1725                        dev->name, res);
1726                 return;
1727         }
1728
1729         if (idx < 0 || idx >= PRISM2_TXFID_COUNT) {
1730                 printk(KERN_DEBUG "%s: prism2_transmit_cb called with invalid "
1731                        "idx=%d\n", dev->name, idx);
1732                 return;
1733         }
1734
1735         if (!test_and_clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1736                 printk(KERN_DEBUG "%s: driver bug: prism2_transmit_cb called "
1737                        "with no pending transmit\n", dev->name);
1738         }
1739
1740         if (netif_queue_stopped(dev)) {
1741                 /* ready for next TX, so wake up queue that was stopped in
1742                  * prism2_transmit() */
1743                 netif_wake_queue(dev);
1744         }
1745
1746         spin_lock(&local->txfidlock);
1747
1748         /* With reclaim, Resp0 contains new txfid for transmit; the old txfid
1749          * will be automatically allocated for the next TX frame */
1750         local->intransmitfid[idx] = resp0;
1751
1752         PDEBUG(DEBUG_FID, "%s: prism2_transmit_cb: txfid[%d]=0x%04x, "
1753                "resp0=0x%04x, transmit_txfid=0x%04x\n",
1754                dev->name, idx, local->txfid[idx],
1755                resp0, local->intransmitfid[local->next_txfid]);
1756
1757         idx++;
1758         if (idx >= PRISM2_TXFID_COUNT)
1759                 idx = 0;
1760         local->next_txfid = idx;
1761
1762         /* check if all TX buffers are occupied */
1763         do {
1764                 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1765                         spin_unlock(&local->txfidlock);
1766                         return;
1767                 }
1768                 idx++;
1769                 if (idx >= PRISM2_TXFID_COUNT)
1770                         idx = 0;
1771         } while (idx != local->next_txfid);
1772         spin_unlock(&local->txfidlock);
1773
1774         /* no empty TX buffers, stop queue */
1775         netif_stop_queue(dev);
1776 }
1777
1778
1779 /* Called only from software IRQ if PCI bus master is not used (with bus master
1780  * this can be called both from software and hardware IRQ) */
1781 static int prism2_transmit(struct net_device *dev, int idx)
1782 {
1783         struct hostap_interface *iface;
1784         local_info_t *local;
1785         int res;
1786
1787         iface = netdev_priv(dev);
1788         local = iface->local;
1789
1790         /* The driver tries to stop netif queue so that there would not be
1791          * more than one attempt to transmit frames going on; check that this
1792          * is really the case */
1793
1794         if (test_and_set_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1795                 printk(KERN_DEBUG "%s: driver bug - prism2_transmit() called "
1796                        "when previous TX was pending\n", dev->name);
1797                 return -1;
1798         }
1799
1800         /* stop the queue for the time that transmit is pending */
1801         netif_stop_queue(dev);
1802
1803         /* transmit packet */
1804         res = hfa384x_cmd_callback(
1805                 dev,
1806                 HFA384X_CMDCODE_TRANSMIT | HFA384X_CMD_TX_RECLAIM,
1807                 local->txfid[idx],
1808                 prism2_transmit_cb, (void *) idx);
1809
1810         if (res) {
1811                 struct net_device_stats *stats;
1812                 printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT "
1813                        "failed (res=%d)\n", dev->name, res);
1814                 stats = hostap_get_stats(dev);
1815                 stats->tx_dropped++;
1816                 netif_wake_queue(dev);
1817                 return -1;
1818         }
1819         dev->trans_start = jiffies;
1820
1821         /* Since we did not wait for command completion, the card continues
1822          * to process on the background and we will finish handling when
1823          * command completion event is handled (prism2_cmd_ev() function) */
1824
1825         return 0;
1826 }
1827
1828
1829 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
1830 /* Called only from hardware IRQ */
1831 static void prism2_tx_cb(struct net_device *dev, void *context,
1832                          u16 resp0, u16 res)
1833 {
1834         struct hostap_interface *iface;
1835         local_info_t *local;
1836         unsigned long addr;
1837         int buf_len = (int) context;
1838
1839         iface = netdev_priv(dev);
1840         local = iface->local;
1841
1842         if (res) {
1843                 printk(KERN_DEBUG "%s: prism2_tx_cb - res=0x%02x\n",
1844                        dev->name, res);
1845                 return;
1846         }
1847
1848         addr = virt_to_phys(local->bus_m0_buf);
1849         HFA384X_OUTW((addr & 0xffff0000) >> 16, HFA384X_PCI_M0_ADDRH_OFF);
1850         HFA384X_OUTW(addr & 0x0000ffff, HFA384X_PCI_M0_ADDRL_OFF);
1851         HFA384X_OUTW(buf_len / 2, HFA384X_PCI_M0_LEN_OFF);
1852         HFA384X_OUTW(HFA384X_PCI_CTL_TO_BAP, HFA384X_PCI_M0_CTL_OFF);
1853 }
1854 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
1855
1856
1857 /* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and
1858  * send the payload with this descriptor) */
1859 /* Called only from software IRQ */
1860 static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
1861 {
1862         struct hostap_interface *iface;
1863         local_info_t *local;
1864         struct hfa384x_tx_frame txdesc;
1865         struct hostap_ieee80211_hdr *hdr;
1866         struct hostap_skb_tx_data *meta;
1867         int hdr_len, data_len, idx, res, ret = -1;
1868         u16 tx_control, fc;
1869
1870         iface = netdev_priv(dev);
1871         local = iface->local;
1872
1873         meta = (struct hostap_skb_tx_data *) skb->cb;
1874         hdr = (struct hostap_ieee80211_hdr *) skb->data;
1875
1876         prism2_callback(local, PRISM2_CALLBACK_TX_START);
1877
1878         if ((local->func->card_present && !local->func->card_present(local)) ||
1879             !local->hw_ready || local->hw_downloading || local->pri_only) {
1880                 if (net_ratelimit()) {
1881                         printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -"
1882                                " skipping\n", dev->name);
1883                 }
1884                 goto fail;
1885         }
1886
1887         memset(&txdesc, 0, sizeof(txdesc));
1888
1889         /* skb->data starts with txdesc->frame_control */
1890         hdr_len = 24;
1891         memcpy(&txdesc.frame_control, skb->data, hdr_len);
1892         fc = le16_to_cpu(txdesc.frame_control);
1893         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_DATA &&
1894             (fc & WLAN_FC_FROMDS) && (fc & WLAN_FC_TODS) && skb->len >= 30) {
1895                 /* Addr4 */
1896                 memcpy(txdesc.addr4, skb->data + hdr_len, ETH_ALEN);
1897                 hdr_len += ETH_ALEN;
1898         }
1899
1900         tx_control = local->tx_control;
1901         if (meta->tx_cb_idx) {
1902                 tx_control |= HFA384X_TX_CTRL_TX_OK;
1903                 txdesc.sw_support = cpu_to_le16(meta->tx_cb_idx);
1904         }
1905         txdesc.tx_control = cpu_to_le16(tx_control);
1906         txdesc.tx_rate = meta->rate;
1907
1908         data_len = skb->len - hdr_len;
1909         txdesc.data_len = cpu_to_le16(data_len);
1910         txdesc.len = cpu_to_be16(data_len);
1911
1912         idx = prism2_get_txfid_idx(local);
1913         if (idx < 0)
1914                 goto fail;
1915
1916         if (local->frame_dump & PRISM2_DUMP_TX_HDR)
1917                 hostap_dump_tx_header(dev->name, &txdesc);
1918
1919         spin_lock(&local->baplock);
1920         res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0);
1921
1922 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
1923         if (!res && skb->len >= local->bus_master_threshold_tx) {
1924                 u8 *pos;
1925                 int buf_len;
1926
1927                 local->bus_m0_tx_idx = idx;
1928
1929                 /* FIX: BAP0 should be locked during bus master transfer, but
1930                  * baplock with BH's disabled is not OK for this; netif queue
1931                  * stopping is not enough since BAP0 is used also for RID
1932                  * read/write */
1933
1934                 /* stop the queue for the time that bus mastering on BAP0 is
1935                  * in use */
1936                 netif_stop_queue(dev);
1937
1938                 spin_unlock(&local->baplock);
1939
1940                 /* Copy frame data to bus_m0_buf */
1941                 pos = local->bus_m0_buf;
1942                 memcpy(pos, &txdesc, sizeof(txdesc));
1943                 pos += sizeof(txdesc);
1944                 memcpy(pos, skb->data + hdr_len, skb->len - hdr_len);
1945                 pos += skb->len - hdr_len;
1946                 buf_len = pos - local->bus_m0_buf;
1947                 if (buf_len & 1)
1948                         buf_len++;
1949
1950 #ifdef PRISM2_ENABLE_BEFORE_TX_BUS_MASTER
1951                 /* Any RX packet seems to break something with TX bus
1952                  * mastering; enable command is enough to fix this.. */
1953                 if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_ENABLE, 0,
1954                                          prism2_tx_cb, (void *) buf_len)) {
1955                         printk(KERN_DEBUG "%s: TX: enable port0 failed\n",
1956                                dev->name);
1957                 }
1958 #else /* PRISM2_ENABLE_BEFORE_TX_BUS_MASTER */
1959                 prism2_tx_cb(dev, (void *) buf_len, 0, 0);
1960 #endif /* PRISM2_ENABLE_BEFORE_TX_BUS_MASTER */
1961
1962                 /* Bus master transfer will be started from command completion
1963                  * event handler and TX handling will be finished by calling
1964                  * prism2_transmit() from bus master event handler */
1965                 goto tx_stats;
1966         }
1967 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
1968
1969         if (!res)
1970                 res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc));
1971         if (!res)
1972                 res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len,
1973                                      skb->len - hdr_len);
1974         spin_unlock(&local->baplock);
1975
1976         if (!res)
1977                 res = prism2_transmit(dev, idx);
1978         if (res) {
1979                 printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n",
1980                        dev->name);
1981                 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
1982                 schedule_work(&local->reset_queue);
1983                 goto fail;
1984         }
1985
1986         ret = 0;
1987
1988 fail:
1989         prism2_callback(local, PRISM2_CALLBACK_TX_END);
1990         return ret;
1991 }
1992
1993
1994 /* Some SMP systems have reported number of odd errors with hostap_pci. fid
1995  * register has changed values between consecutive reads for an unknown reason.
1996  * This should really not happen, so more debugging is needed. This test
1997  * version is a big slower, but it will detect most of such register changes
1998  * and will try to get the correct fid eventually. */
1999 #define EXTRA_FID_READ_TESTS
2000
2001 static inline u16 prism2_read_fid_reg(struct net_device *dev, u16 reg)
2002 {
2003 #ifdef EXTRA_FID_READ_TESTS
2004         u16 val, val2, val3;
2005         int i;
2006
2007         for (i = 0; i < 10; i++) {
2008                 val = HFA384X_INW(reg);
2009                 val2 = HFA384X_INW(reg);
2010                 val3 = HFA384X_INW(reg);
2011
2012                 if (val == val2 && val == val3)
2013                         return val;
2014
2015                 printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):"
2016                        " %04x %04x %04x\n",
2017                        dev->name, i, reg, val, val2, val3);
2018                 if ((val == val2 || val == val3) && val != 0)
2019                         return val;
2020                 if (val2 == val3 && val2 != 0)
2021                         return val2;
2022         }
2023         printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg "
2024                "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3);
2025         return val;
2026 #else /* EXTRA_FID_READ_TESTS */
2027         return HFA384X_INW(reg);
2028 #endif /* EXTRA_FID_READ_TESTS */
2029 }
2030
2031
2032 /* Called only as a tasklet (software IRQ) */
2033 static void prism2_rx(local_info_t *local)
2034 {
2035         struct net_device *dev = local->dev;
2036         int res, rx_pending = 0;
2037         u16 len, hdr_len, rxfid, status, macport;
2038         struct net_device_stats *stats;
2039         struct hfa384x_rx_frame rxdesc;
2040         struct sk_buff *skb = NULL;
2041
2042         prism2_callback(local, PRISM2_CALLBACK_RX_START);
2043         stats = hostap_get_stats(dev);
2044
2045         rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF);
2046 #ifndef final_version
2047         if (rxfid == 0) {
2048                 rxfid = HFA384X_INW(HFA384X_RXFID_OFF);
2049                 printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n",
2050                        rxfid);
2051                 if (rxfid == 0) {
2052                         schedule_work(&local->reset_queue);
2053                         goto rx_dropped;
2054                 }
2055                 /* try to continue with the new rxfid value */
2056         }
2057 #endif
2058
2059         spin_lock(&local->baplock);
2060         res = hfa384x_setup_bap(dev, BAP0, rxfid, 0);
2061         if (!res)
2062                 res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc));
2063
2064         if (res) {
2065                 spin_unlock(&local->baplock);
2066                 printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name,
2067                        res);
2068                 if (res == -ETIMEDOUT) {
2069                         schedule_work(&local->reset_queue);
2070                 }
2071                 goto rx_dropped;
2072         }
2073
2074         len = le16_to_cpu(rxdesc.data_len);
2075         hdr_len = sizeof(rxdesc);
2076         status = le16_to_cpu(rxdesc.status);
2077         macport = (status >> 8) & 0x07;
2078
2079         /* Drop frames with too large reported payload length. Monitor mode
2080          * seems to sometimes pass frames (e.g., ctrl::ack) with signed and
2081          * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for
2082          * macport 7 */
2083         if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) {
2084                 if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) {
2085                         if (len >= (u16) -14) {
2086                                 hdr_len -= 65535 - len;
2087                                 hdr_len--;
2088                         }
2089                         len = 0;
2090                 } else {
2091                         spin_unlock(&local->baplock);
2092                         printk(KERN_DEBUG "%s: Received frame with invalid "
2093                                "length 0x%04x\n", dev->name, len);
2094                         hostap_dump_rx_header(dev->name, &rxdesc);
2095                         goto rx_dropped;
2096                 }
2097         }
2098
2099         skb = dev_alloc_skb(len + hdr_len);
2100         if (!skb) {
2101                 spin_unlock(&local->baplock);
2102                 printk(KERN_DEBUG "%s: RX failed to allocate skb\n",
2103                        dev->name);
2104                 goto rx_dropped;
2105         }
2106         skb->dev = dev;
2107         memcpy(skb_put(skb, hdr_len), &rxdesc, hdr_len);
2108
2109 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
2110         if (len >= local->bus_master_threshold_rx) {
2111                 unsigned long addr;
2112
2113                 hfa384x_events_no_bap1(dev);
2114
2115                 local->rx_skb = skb;
2116                 /* Internal BAP0 offset points to the byte following rxdesc;
2117                  * copy rest of the data using bus master */
2118                 addr = virt_to_phys(skb_put(skb, len));
2119                 HFA384X_OUTW((addr & 0xffff0000) >> 16,
2120                              HFA384X_PCI_M0_ADDRH_OFF);
2121                 HFA384X_OUTW(addr & 0x0000ffff, HFA384X_PCI_M0_ADDRL_OFF);
2122                 if (len & 1)
2123                         len++;
2124                 HFA384X_OUTW(len / 2, HFA384X_PCI_M0_LEN_OFF);
2125                 HFA384X_OUTW(HFA384X_PCI_CTL_FROM_BAP, HFA384X_PCI_M0_CTL_OFF);
2126
2127                 /* pci_bus_m1 event will be generated when data transfer is
2128                  * complete and the frame will then be added to rx_list and
2129                  * rx_tasklet is scheduled */
2130                 rx_pending = 1;
2131
2132                 /* Have to release baplock before returning, although BAP0
2133                  * should really not be used before DMA transfer has been
2134                  * completed. */
2135                 spin_unlock(&local->baplock);
2136         } else
2137 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
2138         {
2139                 if (len > 0)
2140                         res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len),
2141                                                len);
2142                 spin_unlock(&local->baplock);
2143                 if (res) {
2144                         printk(KERN_DEBUG "%s: RX failed to read "
2145                                "frame data\n", dev->name);
2146                         goto rx_dropped;
2147                 }
2148
2149                 skb_queue_tail(&local->rx_list, skb);
2150                 tasklet_schedule(&local->rx_tasklet);
2151         }
2152
2153  rx_exit:
2154         prism2_callback(local, PRISM2_CALLBACK_RX_END);
2155         if (!rx_pending) {
2156                 HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2157         }
2158
2159         return;
2160
2161  rx_dropped:
2162         stats->rx_dropped++;
2163         if (skb)
2164                 dev_kfree_skb(skb);
2165         goto rx_exit;
2166 }
2167
2168
2169 /* Called only as a tasklet (software IRQ) */
2170 static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb)
2171 {
2172         struct hfa384x_rx_frame *rxdesc;
2173         struct net_device *dev = skb->dev;
2174         struct hostap_80211_rx_status stats;
2175         int hdrlen, rx_hdrlen;
2176
2177         rx_hdrlen = sizeof(*rxdesc);
2178         if (skb->len < sizeof(*rxdesc)) {
2179                 /* Allow monitor mode to receive shorter frames */
2180                 if (local->iw_mode == IW_MODE_MONITOR &&
2181                     skb->len >= sizeof(*rxdesc) - 30) {
2182                         rx_hdrlen = skb->len;
2183                 } else {
2184                         dev_kfree_skb(skb);
2185                         return;
2186                 }
2187         }
2188
2189         rxdesc = (struct hfa384x_rx_frame *) skb->data;
2190
2191         if (local->frame_dump & PRISM2_DUMP_RX_HDR &&
2192             skb->len >= sizeof(*rxdesc))
2193                 hostap_dump_rx_header(dev->name, rxdesc);
2194
2195         if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR &&
2196             (!local->monitor_allow_fcserr ||
2197              local->iw_mode != IW_MODE_MONITOR))
2198                 goto drop;
2199
2200         if (skb->len > PRISM2_DATA_MAXLEN) {
2201                 printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n",
2202                        dev->name, skb->len, PRISM2_DATA_MAXLEN);
2203                 goto drop;
2204         }
2205
2206         stats.mac_time = le32_to_cpu(rxdesc->time);
2207         stats.signal = rxdesc->signal - local->rssi_to_dBm;
2208         stats.noise = rxdesc->silence - local->rssi_to_dBm;
2209         stats.rate = rxdesc->rate;
2210
2211         /* Convert Prism2 RX structure into IEEE 802.11 header */
2212         hdrlen = hostap_80211_get_hdrlen(le16_to_cpu(rxdesc->frame_control));
2213         if (hdrlen > rx_hdrlen)
2214                 hdrlen = rx_hdrlen;
2215
2216         memmove(skb_pull(skb, rx_hdrlen - hdrlen),
2217                 &rxdesc->frame_control, hdrlen);
2218
2219         hostap_80211_rx(dev, skb, &stats);
2220         return;
2221
2222  drop:
2223         dev_kfree_skb(skb);
2224 }
2225
2226
2227 /* Called only as a tasklet (software IRQ) */
2228 static void hostap_rx_tasklet(unsigned long data)
2229 {
2230         local_info_t *local = (local_info_t *) data;
2231         struct sk_buff *skb;
2232
2233         while ((skb = skb_dequeue(&local->rx_list)) != NULL)
2234                 hostap_rx_skb(local, skb);
2235 }
2236
2237
2238 /* Called only from hardware IRQ */
2239 static void prism2_alloc_ev(struct net_device *dev)
2240 {
2241         struct hostap_interface *iface;
2242         local_info_t *local;
2243         int idx;
2244         u16 fid;
2245
2246         iface = netdev_priv(dev);
2247         local = iface->local;
2248
2249         fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF);
2250
2251         PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid);
2252
2253         spin_lock(&local->txfidlock);
2254         idx = local->next_alloc;
2255
2256         do {
2257                 if (local->txfid[idx] == fid) {
2258                         PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n",
2259                                idx);
2260
2261 #ifndef final_version
2262                         if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY)
2263                                 printk("Already released txfid found at idx "
2264                                        "%d\n", idx);
2265                         if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED)
2266                                 printk("Already reserved txfid found at idx "
2267                                        "%d\n", idx);
2268 #endif
2269                         local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
2270                         idx++;
2271                         local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 :
2272                                 idx;
2273
2274                         if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) &&
2275                             netif_queue_stopped(dev))
2276                                 netif_wake_queue(dev);
2277
2278                         spin_unlock(&local->txfidlock);
2279                         return;
2280                 }
2281
2282                 idx++;
2283                 if (idx >= PRISM2_TXFID_COUNT)
2284                         idx = 0;
2285         } while (idx != local->next_alloc);
2286
2287         printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new "
2288                "read 0x%04x) for alloc event\n", dev->name, fid,
2289                HFA384X_INW(HFA384X_ALLOCFID_OFF));
2290         printk(KERN_DEBUG "TXFIDs:");
2291         for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++)
2292                 printk(" %04x[%04x]", local->txfid[idx],
2293                        local->intransmitfid[idx]);
2294         printk("\n");
2295         spin_unlock(&local->txfidlock);
2296
2297         /* FIX: should probably schedule reset; reference to one txfid was lost
2298          * completely.. Bad things will happen if we run out of txfids
2299          * Actually, this will cause netdev watchdog to notice TX timeout and
2300          * then card reset after all txfids have been leaked. */
2301 }
2302
2303
2304 /* Called only as a tasklet (software IRQ) */
2305 static void hostap_tx_callback(local_info_t *local,
2306                                struct hfa384x_tx_frame *txdesc, int ok,
2307                                char *payload)
2308 {
2309         u16 sw_support, hdrlen, len;
2310         struct sk_buff *skb;
2311         struct hostap_tx_callback_info *cb;
2312
2313         /* Make sure that frame was from us. */
2314         if (memcmp(txdesc->addr2, local->dev->dev_addr, ETH_ALEN)) {
2315                 printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
2316                        local->dev->name);
2317                 return;
2318         }
2319
2320         sw_support = le16_to_cpu(txdesc->sw_support);
2321
2322         spin_lock(&local->lock);
2323         cb = local->tx_callback;
2324         while (cb != NULL && cb->idx != sw_support)
2325                 cb = cb->next;
2326         spin_unlock(&local->lock);
2327
2328         if (cb == NULL) {
2329                 printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n",
2330                        local->dev->name, sw_support);
2331                 return;
2332         }
2333
2334         hdrlen = hostap_80211_get_hdrlen(le16_to_cpu(txdesc->frame_control));
2335         len = le16_to_cpu(txdesc->data_len);
2336         skb = dev_alloc_skb(hdrlen + len);
2337         if (skb == NULL) {
2338                 printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate "
2339                        "skb\n", local->dev->name);
2340                 return;
2341         }
2342
2343         memcpy(skb_put(skb, hdrlen), (void *) &txdesc->frame_control, hdrlen);
2344         if (payload)
2345                 memcpy(skb_put(skb, len), payload, len);
2346
2347         skb->dev = local->dev;
2348         skb->mac.raw = skb->data;
2349
2350         cb->func(skb, ok, cb->data);
2351 }
2352
2353
2354 /* Called only as a tasklet (software IRQ) */
2355 static int hostap_tx_compl_read(local_info_t *local, int error,
2356                                 struct hfa384x_tx_frame *txdesc,
2357                                 char **payload)
2358 {
2359         u16 fid, len;
2360         int res, ret = 0;
2361         struct net_device *dev = local->dev;
2362
2363         fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF);
2364
2365         PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error);
2366
2367         spin_lock(&local->baplock);
2368         res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2369         if (!res)
2370                 res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc));
2371         if (res) {
2372                 PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not "
2373                        "read txdesc\n", dev->name, error, fid);
2374                 if (res == -ETIMEDOUT) {
2375                         schedule_work(&local->reset_queue);
2376                 }
2377                 ret = -1;
2378                 goto fail;
2379         }
2380         if (txdesc->sw_support) {
2381                 len = le16_to_cpu(txdesc->data_len);
2382                 if (len < PRISM2_DATA_MAXLEN) {
2383                         *payload = (char *) kmalloc(len, GFP_ATOMIC);
2384                         if (*payload == NULL ||
2385                             hfa384x_from_bap(dev, BAP0, *payload, len)) {
2386                                 PDEBUG(DEBUG_EXTRA, "%s: could not read TX "
2387                                        "frame payload\n", dev->name);
2388                                 kfree(*payload);
2389                                 *payload = NULL;
2390                                 ret = -1;
2391                                 goto fail;
2392                         }
2393                 }
2394         }
2395
2396  fail:
2397         spin_unlock(&local->baplock);
2398
2399         return ret;
2400 }
2401
2402
2403 /* Called only as a tasklet (software IRQ) */
2404 static void prism2_tx_ev(local_info_t *local)
2405 {
2406         struct net_device *dev = local->dev;
2407         char *payload = NULL;
2408         struct hfa384x_tx_frame txdesc;
2409
2410         if (hostap_tx_compl_read(local, 0, &txdesc, &payload))
2411                 goto fail;
2412
2413         if (local->frame_dump & PRISM2_DUMP_TX_HDR) {
2414                 PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x "
2415                        "retry_count=%d tx_rate=%d seq_ctrl=%d "
2416                        "duration_id=%d\n",
2417                        dev->name, le16_to_cpu(txdesc.status),
2418                        txdesc.retry_count, txdesc.tx_rate,
2419                        le16_to_cpu(txdesc.seq_ctrl),
2420                        le16_to_cpu(txdesc.duration_id));
2421         }
2422
2423         if (txdesc.sw_support)
2424                 hostap_tx_callback(local, &txdesc, 1, payload);
2425         kfree(payload);
2426
2427  fail:
2428         HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF);
2429 }
2430
2431
2432 /* Called only as a tasklet (software IRQ) */
2433 static void hostap_sta_tx_exc_tasklet(unsigned long data)
2434 {
2435         local_info_t *local = (local_info_t *) data;
2436         struct sk_buff *skb;
2437
2438         while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) {
2439                 struct hfa384x_tx_frame *txdesc =
2440                         (struct hfa384x_tx_frame *) skb->data;
2441
2442                 if (skb->len >= sizeof(*txdesc)) {
2443                         /* Convert Prism2 RX structure into IEEE 802.11 header
2444                          */
2445                         u16 fc = le16_to_cpu(txdesc->frame_control);
2446                         int hdrlen = hostap_80211_get_hdrlen(fc);
2447                         memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen),
2448                                 &txdesc->frame_control, hdrlen);
2449
2450                         hostap_handle_sta_tx_exc(local, skb);
2451                 }
2452                 dev_kfree_skb(skb);
2453         }
2454 }
2455
2456
2457 /* Called only as a tasklet (software IRQ) */
2458 static void prism2_txexc(local_info_t *local)
2459 {
2460         struct net_device *dev = local->dev;
2461         u16 status, fc;
2462         int show_dump, res;
2463         char *payload = NULL;
2464         struct hfa384x_tx_frame txdesc;
2465
2466         show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR;
2467         local->stats.tx_errors++;
2468
2469         res = hostap_tx_compl_read(local, 1, &txdesc, &payload);
2470         HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF);
2471         if (res)
2472                 return;
2473
2474         status = le16_to_cpu(txdesc.status);
2475
2476         /* We produce a TXDROP event only for retry or lifetime
2477          * exceeded, because that's the only status that really mean
2478          * that this particular node went away.
2479          * Other errors means that *we* screwed up. - Jean II */
2480         if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR))
2481         {
2482                 union iwreq_data wrqu;
2483
2484                 /* Copy 802.11 dest address. */
2485                 memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN);
2486                 wrqu.addr.sa_family = ARPHRD_ETHER;
2487                 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
2488         } else
2489                 show_dump = 1;
2490
2491         if (local->iw_mode == IW_MODE_MASTER ||
2492             local->iw_mode == IW_MODE_REPEAT ||
2493             local->wds_type & HOSTAP_WDS_AP_CLIENT) {
2494                 struct sk_buff *skb;
2495                 skb = dev_alloc_skb(sizeof(txdesc));
2496                 if (skb) {
2497                         memcpy(skb_put(skb, sizeof(txdesc)), &txdesc,
2498                                sizeof(txdesc));
2499                         skb_queue_tail(&local->sta_tx_exc_list, skb);
2500                         tasklet_schedule(&local->sta_tx_exc_tasklet);
2501                 }
2502         }
2503
2504         if (txdesc.sw_support)
2505                 hostap_tx_callback(local, &txdesc, 0, payload);
2506         kfree(payload);
2507
2508         if (!show_dump)
2509                 return;
2510
2511         PDEBUG(DEBUG_EXTRA, "%s: TXEXC - status=0x%04x (%s%s%s%s)"
2512                " tx_control=%04x\n",
2513                dev->name, status,
2514                status & HFA384X_TX_STATUS_RETRYERR ? "[RetryErr]" : "",
2515                status & HFA384X_TX_STATUS_AGEDERR ? "[AgedErr]" : "",
2516                status & HFA384X_TX_STATUS_DISCON ? "[Discon]" : "",
2517                status & HFA384X_TX_STATUS_FORMERR ? "[FormErr]" : "",
2518                le16_to_cpu(txdesc.tx_control));
2519
2520         fc = le16_to_cpu(txdesc.frame_control);
2521         PDEBUG(DEBUG_EXTRA, "   retry_count=%d tx_rate=%d fc=0x%04x "
2522                "(%s%s%s::%d%s%s)\n",
2523                txdesc.retry_count, txdesc.tx_rate, fc,
2524                WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT ? "Mgmt" : "",
2525                WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_CTRL ? "Ctrl" : "",
2526                WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_DATA ? "Data" : "",
2527                WLAN_FC_GET_STYPE(fc),
2528                fc & WLAN_FC_TODS ? " ToDS" : "",
2529                fc & WLAN_FC_FROMDS ? " FromDS" : "");
2530         PDEBUG(DEBUG_EXTRA, "   A1=" MACSTR " A2=" MACSTR " A3="
2531                MACSTR " A4=" MACSTR "\n",
2532                MAC2STR(txdesc.addr1), MAC2STR(txdesc.addr2),
2533                MAC2STR(txdesc.addr3), MAC2STR(txdesc.addr4));
2534 }
2535
2536
2537 /* Called only as a tasklet (software IRQ) */
2538 static void hostap_info_tasklet(unsigned long data)
2539 {
2540         local_info_t *local = (local_info_t *) data;
2541         struct sk_buff *skb;
2542
2543         while ((skb = skb_dequeue(&local->info_list)) != NULL) {
2544                 hostap_info_process(local, skb);
2545                 dev_kfree_skb(skb);
2546         }
2547 }
2548
2549
2550 /* Called only as a tasklet (software IRQ) */
2551 static void prism2_info(local_info_t *local)
2552 {
2553         struct net_device *dev = local->dev;
2554         u16 fid;
2555         int res, left;
2556         struct hfa384x_info_frame info;
2557         struct sk_buff *skb;
2558
2559         fid = HFA384X_INW(HFA384X_INFOFID_OFF);
2560
2561         spin_lock(&local->baplock);
2562         res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2563         if (!res)
2564                 res = hfa384x_from_bap(dev, BAP0, &info, sizeof(info));
2565         if (res) {
2566                 spin_unlock(&local->baplock);
2567                 printk(KERN_DEBUG "Could not get info frame (fid=0x%04x)\n",
2568                        fid);
2569                 if (res == -ETIMEDOUT) {
2570                         schedule_work(&local->reset_queue);
2571                 }
2572                 goto out;
2573         }
2574
2575         le16_to_cpus(&info.len);
2576         le16_to_cpus(&info.type);
2577         left = (info.len - 1) * 2;
2578
2579         if (info.len & 0x8000 || info.len == 0 || left > 2060) {
2580                 /* data register seems to give 0x8000 in some error cases even
2581                  * though busy bit is not set in offset register;
2582                  * in addition, length must be at least 1 due to type field */
2583                 spin_unlock(&local->baplock);
2584                 printk(KERN_DEBUG "%s: Received info frame with invalid "
2585                        "length 0x%04x (type 0x%04x)\n", dev->name, info.len,
2586                        info.type);
2587                 goto out;
2588         }
2589
2590         skb = dev_alloc_skb(sizeof(info) + left);
2591         if (skb == NULL) {
2592                 spin_unlock(&local->baplock);
2593                 printk(KERN_DEBUG "%s: Could not allocate skb for info "
2594                        "frame\n", dev->name);
2595                 goto out;
2596         }
2597
2598         memcpy(skb_put(skb, sizeof(info)), &info, sizeof(info));
2599         if (left > 0 && hfa384x_from_bap(dev, BAP0, skb_put(skb, left), left))
2600         {
2601                 spin_unlock(&local->baplock);
2602                 printk(KERN_WARNING "%s: Info frame read failed (fid=0x%04x, "
2603                        "len=0x%04x, type=0x%04x\n",
2604                        dev->name, fid, info.len, info.type);
2605                 dev_kfree_skb(skb);
2606                 goto out;
2607         }
2608         spin_unlock(&local->baplock);
2609
2610         skb_queue_tail(&local->info_list, skb);
2611         tasklet_schedule(&local->info_tasklet);
2612
2613  out:
2614         HFA384X_OUTW(HFA384X_EV_INFO, HFA384X_EVACK_OFF);
2615 }
2616
2617
2618 /* Called only as a tasklet (software IRQ) */
2619 static void hostap_bap_tasklet(unsigned long data)
2620 {
2621         local_info_t *local = (local_info_t *) data;
2622         struct net_device *dev = local->dev;
2623         u16 ev;
2624         int frames = 30;
2625
2626         if (local->func->card_present && !local->func->card_present(local))
2627                 return;
2628
2629         set_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2630
2631         /* Process all pending BAP events without generating new interrupts
2632          * for them */
2633         while (frames-- > 0) {
2634                 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2635                 if (ev == 0xffff || !(ev & HFA384X_BAP0_EVENTS))
2636                         break;
2637                 if (ev & HFA384X_EV_RX)
2638                         prism2_rx(local);
2639                 if (ev & HFA384X_EV_INFO)
2640                         prism2_info(local);
2641                 if (ev & HFA384X_EV_TX)
2642                         prism2_tx_ev(local);
2643                 if (ev & HFA384X_EV_TXEXC)
2644                         prism2_txexc(local);
2645         }
2646
2647         set_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2648         clear_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2649
2650         /* Enable interrupts for new BAP events */
2651         hfa384x_events_all(dev);
2652         clear_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2653 }
2654
2655
2656 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
2657 /* Called only from hardware IRQ */
2658 static void prism2_bus_master_ev(struct net_device *dev, int bap)
2659 {
2660         struct hostap_interface *iface;
2661         local_info_t *local;
2662
2663         iface = netdev_priv(dev);
2664         local = iface->local;
2665
2666         if (bap == BAP1) {
2667                 /* FIX: frame payload was DMA'd to skb->data; might need to
2668                  * invalidate data cache for that memory area */
2669                 skb_queue_tail(&local->rx_list, local->rx_skb);
2670                 tasklet_schedule(&local->rx_tasklet);
2671                 HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2672         } else {
2673                 if (prism2_transmit(dev, local->bus_m0_tx_idx)) {
2674                         printk(KERN_DEBUG "%s: prism2_transmit() failed "
2675                                "when called from bus master event\n",
2676                                dev->name);
2677                         local->intransmitfid[local->bus_m0_tx_idx] =
2678                                 PRISM2_TXFID_EMPTY;
2679                         schedule_work(&local->reset_queue);
2680                 }
2681         }
2682 }
2683 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
2684
2685
2686 /* Called only from hardware IRQ */
2687 static void prism2_infdrop(struct net_device *dev)
2688 {
2689         static unsigned long last_inquire = 0;
2690
2691         PDEBUG(DEBUG_EXTRA, "%s: INFDROP event\n", dev->name);
2692
2693         /* some firmware versions seem to get stuck with
2694          * full CommTallies in high traffic load cases; every
2695          * packet will then cause INFDROP event and CommTallies
2696          * info frame will not be sent automatically. Try to
2697          * get out of this state by inquiring CommTallies. */
2698         if (!last_inquire || time_after(jiffies, last_inquire + HZ)) {
2699                 hfa384x_cmd_callback(dev, HFA384X_CMDCODE_INQUIRE,
2700                                      HFA384X_INFO_COMMTALLIES, NULL, NULL);
2701                 last_inquire = jiffies;
2702         }
2703 }
2704
2705
2706 /* Called only from hardware IRQ */
2707 static void prism2_ev_tick(struct net_device *dev)
2708 {
2709         struct hostap_interface *iface;
2710         local_info_t *local;
2711         u16 evstat, inten;
2712         static int prev_stuck = 0;
2713
2714         iface = netdev_priv(dev);
2715         local = iface->local;
2716
2717         if (time_after(jiffies, local->last_tick_timer + 5 * HZ) &&
2718             local->last_tick_timer) {
2719                 evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
2720                 inten = HFA384X_INW(HFA384X_INTEN_OFF);
2721                 if (!prev_stuck) {
2722                         printk(KERN_INFO "%s: SW TICK stuck? "
2723                                "bits=0x%lx EvStat=%04x IntEn=%04x\n",
2724                                dev->name, local->bits, evstat, inten);
2725                 }
2726                 local->sw_tick_stuck++;
2727                 if ((evstat & HFA384X_BAP0_EVENTS) &&
2728                     (inten & HFA384X_BAP0_EVENTS)) {
2729                         printk(KERN_INFO "%s: trying to recover from IRQ "
2730                                "hang\n", dev->name);
2731                         hfa384x_events_no_bap0(dev);
2732                 }
2733                 prev_stuck = 1;
2734         } else
2735                 prev_stuck = 0;
2736 }
2737
2738
2739 /* Called only from hardware IRQ */
2740 static inline void prism2_check_magic(local_info_t *local)
2741 {
2742         /* at least PCI Prism2.5 with bus mastering seems to sometimes
2743          * return 0x0000 in SWSUPPORT0 for unknown reason, but re-reading the
2744          * register once or twice seems to get the correct value.. PCI cards
2745          * cannot anyway be removed during normal operation, so there is not
2746          * really any need for this verification with them. */
2747
2748 #ifndef PRISM2_PCI
2749 #ifndef final_version
2750         static unsigned long last_magic_err = 0;
2751         struct net_device *dev = local->dev;
2752
2753         if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
2754                 if (!local->hw_ready)
2755                         return;
2756                 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2757                 if (time_after(jiffies, last_magic_err + 10 * HZ)) {
2758                         printk("%s: Interrupt, but SWSUPPORT0 does not match: "
2759                                "%04X != %04X - card removed?\n", dev->name,
2760                                HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2761                                HFA384X_MAGIC);
2762                         last_magic_err = jiffies;
2763                 } else if (net_ratelimit()) {
2764                         printk(KERN_DEBUG "%s: interrupt - SWSUPPORT0=%04x "
2765                                "MAGIC=%04x\n", dev->name,
2766                                HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2767                                HFA384X_MAGIC);
2768                 }
2769                 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != 0xffff)
2770                         schedule_work(&local->reset_queue);
2771                 return;
2772         }
2773 #endif /* final_version */
2774 #endif /* !PRISM2_PCI */
2775 }
2776
2777
2778 /* Called only from hardware IRQ */
2779 static irqreturn_t prism2_interrupt(int irq, void *dev_id, struct pt_regs *regs)
2780 {
2781         struct net_device *dev = (struct net_device *) dev_id;
2782         struct hostap_interface *iface;
2783         local_info_t *local;
2784         int events = 0;
2785         u16 ev;
2786
2787         iface = netdev_priv(dev);
2788         local = iface->local;
2789
2790         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 0);
2791
2792         if (local->func->card_present && !local->func->card_present(local)) {
2793                 if (net_ratelimit()) {
2794                         printk(KERN_DEBUG "%s: Interrupt, but dev not OK\n",
2795                                dev->name);
2796                 }
2797                 return IRQ_HANDLED;
2798         }
2799
2800         prism2_check_magic(local);
2801
2802         for (;;) {
2803                 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2804                 if (ev == 0xffff) {
2805                         if (local->shutdown)
2806                                 return IRQ_HANDLED;
2807                         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2808                         printk(KERN_DEBUG "%s: prism2_interrupt: ev=0xffff\n",
2809                                dev->name);
2810                         return IRQ_HANDLED;
2811                 }
2812
2813                 ev &= HFA384X_INW(HFA384X_INTEN_OFF);
2814                 if (ev == 0)
2815                         break;
2816
2817                 if (ev & HFA384X_EV_CMD) {
2818                         prism2_cmd_ev(dev);
2819                 }
2820
2821                 /* Above events are needed even before hw is ready, but other
2822                  * events should be skipped during initialization. This may
2823                  * change for AllocEv if allocate_fid is implemented without
2824                  * busy waiting. */
2825                 if (!local->hw_ready || local->hw_resetting ||
2826                     !local->dev_enabled) {
2827                         ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2828                         if (ev & HFA384X_EV_CMD)
2829                                 goto next_event;
2830                         if ((ev & HFA384X_EVENT_MASK) == 0)
2831                                 return IRQ_HANDLED;
2832                         if (local->dev_enabled && (ev & ~HFA384X_EV_TICK) &&
2833                             net_ratelimit()) {
2834                                 printk(KERN_DEBUG "%s: prism2_interrupt: hw "
2835                                        "not ready; skipping events 0x%04x "
2836                                        "(IntEn=0x%04x)%s%s%s\n",
2837                                        dev->name, ev,
2838                                        HFA384X_INW(HFA384X_INTEN_OFF),
2839                                        !local->hw_ready ? " (!hw_ready)" : "",
2840                                        local->hw_resetting ?
2841                                        " (hw_resetting)" : "",
2842                                        !local->dev_enabled ?
2843                                        " (!dev_enabled)" : "");
2844                         }
2845                         HFA384X_OUTW(ev, HFA384X_EVACK_OFF);
2846                         return IRQ_HANDLED;
2847                 }
2848
2849                 if (ev & HFA384X_EV_TICK) {
2850                         prism2_ev_tick(dev);
2851                         HFA384X_OUTW(HFA384X_EV_TICK, HFA384X_EVACK_OFF);
2852                 }
2853
2854 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
2855                 if (ev & HFA384X_EV_PCI_M0) {
2856                         prism2_bus_master_ev(dev, BAP0);
2857                         HFA384X_OUTW(HFA384X_EV_PCI_M0, HFA384X_EVACK_OFF);
2858                 }
2859
2860                 if (ev & HFA384X_EV_PCI_M1) {
2861                         /* previous RX has been copied can be ACKed now */
2862                         HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2863
2864                         prism2_bus_master_ev(dev, BAP1);
2865                         HFA384X_OUTW(HFA384X_EV_PCI_M1, HFA384X_EVACK_OFF);
2866                 }
2867 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
2868
2869                 if (ev & HFA384X_EV_ALLOC) {
2870                         prism2_alloc_ev(dev);
2871                         HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
2872                 }
2873
2874                 /* Reading data from the card is quite time consuming, so do it
2875                  * in tasklets. TX, TXEXC, RX, and INFO events will be ACKed
2876                  * and unmasked after needed data has been read completely. */
2877                 if (ev & HFA384X_BAP0_EVENTS) {
2878                         hfa384x_events_no_bap0(dev);
2879                         tasklet_schedule(&local->bap_tasklet);
2880                 }
2881
2882 #ifndef final_version
2883                 if (ev & HFA384X_EV_WTERR) {
2884                         PDEBUG(DEBUG_EXTRA, "%s: WTERR event\n", dev->name);
2885                         HFA384X_OUTW(HFA384X_EV_WTERR, HFA384X_EVACK_OFF);
2886                 }
2887 #endif /* final_version */
2888
2889                 if (ev & HFA384X_EV_INFDROP) {
2890                         prism2_infdrop(dev);
2891                         HFA384X_OUTW(HFA384X_EV_INFDROP, HFA384X_EVACK_OFF);
2892                 }
2893
2894         next_event:
2895                 events++;
2896                 if (events >= PRISM2_MAX_INTERRUPT_EVENTS) {
2897                         PDEBUG(DEBUG_EXTRA, "prism2_interrupt: >%d events "
2898                                "(EvStat=0x%04x)\n",
2899                                PRISM2_MAX_INTERRUPT_EVENTS,
2900                                HFA384X_INW(HFA384X_EVSTAT_OFF));
2901                         break;
2902                 }
2903         }
2904         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 1);
2905         return IRQ_RETVAL(events);
2906 }
2907
2908
2909 static void prism2_check_sta_fw_version(local_info_t *local)
2910 {
2911         struct hfa384x_comp_ident comp;
2912         int id, variant, major, minor;
2913
2914         if (hfa384x_get_rid(local->dev, HFA384X_RID_STAID,
2915                             &comp, sizeof(comp), 1) < 0)
2916                 return;
2917
2918         local->fw_ap = 0;
2919         id = le16_to_cpu(comp.id);
2920         if (id != HFA384X_COMP_ID_STA) {
2921                 if (id == HFA384X_COMP_ID_FW_AP)
2922                         local->fw_ap = 1;
2923                 return;
2924         }
2925
2926         major = __le16_to_cpu(comp.major);
2927         minor = __le16_to_cpu(comp.minor);
2928         variant = __le16_to_cpu(comp.variant);
2929         local->sta_fw_ver = PRISM2_FW_VER(major, minor, variant);
2930
2931         /* Station firmware versions before 1.4.x seem to have a bug in
2932          * firmware-based WEP encryption when using Host AP mode, so use
2933          * host_encrypt as a default for them. Firmware version 1.4.9 is the
2934          * first one that has been seen to produce correct encryption, but the
2935          * bug might be fixed before that (although, at least 1.4.2 is broken).
2936          */
2937         local->fw_encrypt_ok = local->sta_fw_ver >= PRISM2_FW_VER(1,4,9);
2938
2939         if (local->iw_mode == IW_MODE_MASTER && !local->host_encrypt &&
2940             !local->fw_encrypt_ok) {
2941                 printk(KERN_DEBUG "%s: defaulting to host-based encryption as "
2942                        "a workaround for firmware bug in Host AP mode WEP\n",
2943                        local->dev->name);
2944                 local->host_encrypt = 1;
2945         }
2946
2947         /* IEEE 802.11 standard compliant WDS frames (4 addresses) were broken
2948          * in station firmware versions before 1.5.x. With these versions, the
2949          * driver uses a workaround with bogus frame format (4th address after
2950          * the payload). This is not compatible with other AP devices. Since
2951          * the firmware bug is fixed in the latest station firmware versions,
2952          * automatically enable standard compliant mode for cards using station
2953          * firmware version 1.5.0 or newer. */
2954         if (local->sta_fw_ver >= PRISM2_FW_VER(1,5,0))
2955                 local->wds_type |= HOSTAP_WDS_STANDARD_FRAME;
2956         else {
2957                 printk(KERN_DEBUG "%s: defaulting to bogus WDS frame as a "
2958                        "workaround for firmware bug in Host AP mode WDS\n",
2959                        local->dev->name);
2960         }
2961
2962         hostap_check_sta_fw_version(local->ap, local->sta_fw_ver);
2963 }
2964
2965
2966 static void prism2_crypt_deinit_entries(local_info_t *local, int force)
2967 {
2968         struct list_head *ptr, *n;
2969         struct prism2_crypt_data *entry;
2970
2971         for (ptr = local->crypt_deinit_list.next, n = ptr->next;
2972              ptr != &local->crypt_deinit_list; ptr = n, n = ptr->next) {
2973                 entry = list_entry(ptr, struct prism2_crypt_data, list);
2974
2975                 if (atomic_read(&entry->refcnt) != 0 && !force)
2976                         continue;
2977
2978                 list_del(ptr);
2979
2980                 if (entry->ops)
2981                         entry->ops->deinit(entry->priv);
2982                 kfree(entry);
2983         }
2984 }
2985
2986
2987 static void prism2_crypt_deinit_handler(unsigned long data)
2988 {
2989         local_info_t *local = (local_info_t *) data;
2990         unsigned long flags;
2991
2992         spin_lock_irqsave(&local->lock, flags);
2993         prism2_crypt_deinit_entries(local, 0);
2994         if (!list_empty(&local->crypt_deinit_list)) {
2995                 printk(KERN_DEBUG "%s: entries remaining in delayed crypt "
2996                        "deletion list\n", local->dev->name);
2997                 local->crypt_deinit_timer.expires = jiffies + HZ;
2998                 add_timer(&local->crypt_deinit_timer);
2999         }
3000         spin_unlock_irqrestore(&local->lock, flags);
3001
3002 }
3003
3004
3005 static void hostap_passive_scan(unsigned long data)
3006 {
3007         local_info_t *local = (local_info_t *) data;
3008         struct net_device *dev = local->dev;
3009         u16 channel;
3010
3011         if (local->passive_scan_interval <= 0)
3012                 return;
3013
3014         if (local->passive_scan_state == PASSIVE_SCAN_LISTEN) {
3015                 int max_tries = 16;
3016
3017                 /* Even though host system does not really know when the WLAN
3018                  * MAC is sending frames, try to avoid changing channels for
3019                  * passive scanning when a host-generated frame is being
3020                  * transmitted */
3021                 if (test_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
3022                         printk(KERN_DEBUG "%s: passive scan detected pending "
3023                                "TX - delaying\n", dev->name);
3024                         local->passive_scan_timer.expires = jiffies + HZ / 10;
3025                         add_timer(&local->passive_scan_timer);
3026                         return;
3027                 }
3028
3029                 do {
3030                         local->passive_scan_channel++;
3031                         if (local->passive_scan_channel > 14)
3032                                 local->passive_scan_channel = 1;
3033                         max_tries--;
3034                 } while (!(local->channel_mask &
3035                            (1 << (local->passive_scan_channel - 1))) &&
3036                          max_tries > 0);
3037
3038                 if (max_tries == 0) {
3039                         printk(KERN_INFO "%s: no allowed passive scan channels"
3040                                " found\n", dev->name);
3041                         return;
3042                 }
3043
3044                 printk(KERN_DEBUG "%s: passive scan channel %d\n",
3045                        dev->name, local->passive_scan_channel);
3046                 channel = local->passive_scan_channel;
3047                 local->passive_scan_state = PASSIVE_SCAN_WAIT;
3048                 local->passive_scan_timer.expires = jiffies + HZ / 10;
3049         } else {
3050                 channel = local->channel;
3051                 local->passive_scan_state = PASSIVE_SCAN_LISTEN;
3052                 local->passive_scan_timer.expires = jiffies +
3053                         local->passive_scan_interval * HZ;
3054         }
3055
3056         if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_TEST |
3057                                  (HFA384X_TEST_CHANGE_CHANNEL << 8),
3058                                  channel, NULL, NULL))
3059                 printk(KERN_ERR "%s: passive scan channel set %d "
3060                        "failed\n", dev->name, channel);
3061
3062         add_timer(&local->passive_scan_timer);
3063 }
3064
3065
3066 /* Called only as a scheduled task when communications quality values should
3067  * be updated. */
3068 static void handle_comms_qual_update(void *data)
3069 {
3070         local_info_t *local = data;
3071         prism2_update_comms_qual(local->dev);
3072 }
3073
3074
3075 /* Software watchdog - called as a timer. Hardware interrupt (Tick event) is
3076  * used to monitor that local->last_tick_timer is being updated. If not,
3077  * interrupt busy-loop is assumed and driver tries to recover by masking out
3078  * some events. */
3079 static void hostap_tick_timer(unsigned long data)
3080 {
3081         static unsigned long last_inquire = 0;
3082         local_info_t *local = (local_info_t *) data;
3083         local->last_tick_timer = jiffies;
3084
3085         /* Inquire CommTallies every 10 seconds to keep the statistics updated
3086          * more often during low load and when using 32-bit tallies. */
3087         if ((!last_inquire || time_after(jiffies, last_inquire + 10 * HZ)) &&
3088             !local->hw_downloading && local->hw_ready &&
3089             !local->hw_resetting && local->dev_enabled) {
3090                 hfa384x_cmd_callback(local->dev, HFA384X_CMDCODE_INQUIRE,
3091                                      HFA384X_INFO_COMMTALLIES, NULL, NULL);
3092                 last_inquire = jiffies;
3093         }
3094
3095         if ((local->last_comms_qual_update == 0 ||
3096              time_after(jiffies, local->last_comms_qual_update + 10 * HZ)) &&
3097             (local->iw_mode == IW_MODE_INFRA ||
3098              local->iw_mode == IW_MODE_ADHOC)) {
3099                 schedule_work(&local->comms_qual_update);
3100         }
3101
3102         local->tick_timer.expires = jiffies + 2 * HZ;
3103         add_timer(&local->tick_timer);
3104 }
3105
3106
3107 #ifndef PRISM2_NO_PROCFS_DEBUG
3108 static int prism2_registers_proc_read(char *page, char **start, off_t off,
3109                                       int count, int *eof, void *data)
3110 {
3111         char *p = page;
3112         local_info_t *local = (local_info_t *) data;
3113
3114         if (off != 0) {
3115                 *eof = 1;
3116                 return 0;
3117         }
3118
3119 #define SHOW_REG(n) \
3120 p += sprintf(p, #n "=%04x\n", hfa384x_read_reg(local->dev, HFA384X_##n##_OFF))
3121
3122         SHOW_REG(CMD);
3123         SHOW_REG(PARAM0);
3124         SHOW_REG(PARAM1);
3125         SHOW_REG(PARAM2);
3126         SHOW_REG(STATUS);
3127         SHOW_REG(RESP0);
3128         SHOW_REG(RESP1);
3129         SHOW_REG(RESP2);
3130         SHOW_REG(INFOFID);
3131         SHOW_REG(CONTROL);
3132         SHOW_REG(SELECT0);
3133         SHOW_REG(SELECT1);
3134         SHOW_REG(OFFSET0);
3135         SHOW_REG(OFFSET1);
3136         SHOW_REG(RXFID);
3137         SHOW_REG(ALLOCFID);
3138         SHOW_REG(TXCOMPLFID);
3139         SHOW_REG(SWSUPPORT0);
3140         SHOW_REG(SWSUPPORT1);
3141         SHOW_REG(SWSUPPORT2);
3142         SHOW_REG(EVSTAT);
3143         SHOW_REG(INTEN);
3144         SHOW_REG(EVACK);
3145         /* Do not read data registers, because they change the state of the
3146          * MAC (offset += 2) */
3147         /* SHOW_REG(DATA0); */
3148         /* SHOW_REG(DATA1); */
3149         SHOW_REG(AUXPAGE);
3150         SHOW_REG(AUXOFFSET);
3151         /* SHOW_REG(AUXDATA); */
3152 #ifdef PRISM2_PCI
3153         SHOW_REG(PCICOR);
3154         SHOW_REG(PCIHCR);
3155         SHOW_REG(PCI_M0_ADDRH);
3156         SHOW_REG(PCI_M0_ADDRL);
3157         SHOW_REG(PCI_M0_LEN);
3158         SHOW_REG(PCI_M0_CTL);
3159         SHOW_REG(PCI_STATUS);
3160         SHOW_REG(PCI_M1_ADDRH);
3161         SHOW_REG(PCI_M1_ADDRL);
3162         SHOW_REG(PCI_M1_LEN);
3163         SHOW_REG(PCI_M1_CTL);
3164 #endif /* PRISM2_PCI */
3165
3166         return (p - page);
3167 }
3168 #endif /* PRISM2_NO_PROCFS_DEBUG */
3169
3170
3171 struct set_tim_data {
3172         struct list_head list;
3173         int aid;
3174         int set;
3175 };
3176
3177 static int prism2_set_tim(struct net_device *dev, int aid, int set)
3178 {
3179         struct list_head *ptr;
3180         struct set_tim_data *new_entry;
3181         struct hostap_interface *iface;
3182         local_info_t *local;
3183
3184         iface = netdev_priv(dev);
3185         local = iface->local;
3186
3187         new_entry = (struct set_tim_data *)
3188                 kmalloc(sizeof(*new_entry), GFP_ATOMIC);
3189         if (new_entry == NULL) {
3190                 printk(KERN_DEBUG "%s: prism2_set_tim: kmalloc failed\n",
3191                        local->dev->name);
3192                 return -ENOMEM;
3193         }
3194         memset(new_entry, 0, sizeof(*new_entry));
3195         new_entry->aid = aid;
3196         new_entry->set = set;
3197
3198         spin_lock_bh(&local->set_tim_lock);
3199         list_for_each(ptr, &local->set_tim_list) {
3200                 struct set_tim_data *entry =
3201                         list_entry(ptr, struct set_tim_data, list);
3202                 if (entry->aid == aid) {
3203                         PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d "
3204                                "set=%d ==> %d\n",
3205                                local->dev->name, aid, entry->set, set);
3206                         entry->set = set;
3207                         kfree(new_entry);
3208                         new_entry = NULL;
3209                         break;
3210                 }
3211         }
3212         if (new_entry)
3213                 list_add_tail(&new_entry->list, &local->set_tim_list);
3214         spin_unlock_bh(&local->set_tim_lock);
3215
3216         schedule_work(&local->set_tim_queue);
3217
3218         return 0;
3219 }
3220
3221
3222 static void handle_set_tim_queue(void *data)
3223 {
3224         local_info_t *local = (local_info_t *) data;
3225         struct set_tim_data *entry;
3226         u16 val;
3227
3228         for (;;) {
3229                 entry = NULL;
3230                 spin_lock_bh(&local->set_tim_lock);
3231                 if (!list_empty(&local->set_tim_list)) {
3232                         entry = list_entry(local->set_tim_list.next,
3233                                            struct set_tim_data, list);
3234                         list_del(&entry->list);
3235                 }
3236                 spin_unlock_bh(&local->set_tim_lock);
3237                 if (!entry)
3238                         break;
3239
3240                 PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n",
3241                        local->dev->name, entry->aid, entry->set);
3242
3243                 val = entry->aid;
3244                 if (entry->set)
3245                         val |= 0x8000;
3246                 if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) {
3247                         printk(KERN_DEBUG "%s: set_tim failed (aid=%d "
3248                                "set=%d)\n",
3249                                local->dev->name, entry->aid, entry->set);
3250                 }
3251
3252                 kfree(entry);
3253         }
3254 }
3255
3256
3257 static void prism2_clear_set_tim_queue(local_info_t *local)
3258 {
3259         struct list_head *ptr, *n;
3260
3261         list_for_each_safe(ptr, n, &local->set_tim_list) {
3262                 struct set_tim_data *entry;
3263                 entry = list_entry(ptr, struct set_tim_data, list);
3264                 list_del(&entry->list);
3265                 kfree(entry);
3266         }
3267 }
3268
3269
3270 static struct net_device *
3271 prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx)
3272 {
3273         struct net_device *dev;
3274         struct hostap_interface *iface;
3275         struct local_info *local;
3276         int len, i, ret;
3277
3278         if (funcs == NULL)
3279                 return NULL;
3280
3281         len = strlen(dev_template);
3282         if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) {
3283                 printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n",
3284                        dev_template);
3285                 return NULL;
3286         }
3287
3288         len = sizeof(struct hostap_interface) +
3289                 3 + sizeof(struct local_info) +
3290                 3 + sizeof(struct ap_data);
3291
3292         dev = alloc_etherdev(len);
3293         if (dev == NULL)
3294                 return NULL;
3295
3296         iface = netdev_priv(dev);
3297         local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3);
3298         local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3);
3299         local->dev = iface->dev = dev;
3300         iface->local = local;
3301         iface->type = HOSTAP_INTERFACE_MASTER;
3302         INIT_LIST_HEAD(&local->hostap_interfaces);
3303
3304         local->hw_module = THIS_MODULE;
3305
3306 #ifdef PRISM2_IO_DEBUG
3307         local->io_debug_enabled = 1;
3308 #endif /* PRISM2_IO_DEBUG */
3309
3310 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
3311         local->bus_m0_buf = (u8 *) kmalloc(sizeof(struct hfa384x_tx_frame) +
3312                                            PRISM2_DATA_MAXLEN, GFP_DMA);
3313         if (local->bus_m0_buf == NULL)
3314                 goto fail;
3315 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
3316
3317         local->func = funcs;
3318         local->func->cmd = hfa384x_cmd;
3319         local->func->read_regs = hfa384x_read_regs;
3320         local->func->get_rid = hfa384x_get_rid;
3321         local->func->set_rid = hfa384x_set_rid;
3322         local->func->hw_enable = prism2_hw_enable;
3323         local->func->hw_config = prism2_hw_config;
3324         local->func->hw_reset = prism2_hw_reset;
3325         local->func->hw_shutdown = prism2_hw_shutdown;
3326         local->func->reset_port = prism2_reset_port;
3327         local->func->schedule_reset = prism2_schedule_reset;
3328 #ifdef PRISM2_DOWNLOAD_SUPPORT
3329         local->func->read_aux = prism2_download_aux_dump;
3330         local->func->download = prism2_download;
3331 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3332         local->func->tx = prism2_tx_80211;
3333         local->func->set_tim = prism2_set_tim;
3334         local->func->need_tx_headroom = 0; /* no need to add txdesc in
3335                                             * skb->data (FIX: maybe for DMA bus
3336                                             * mastering? */
3337
3338         local->mtu = mtu;
3339
3340         rwlock_init(&local->iface_lock);
3341         spin_lock_init(&local->txfidlock);
3342         spin_lock_init(&local->cmdlock);
3343         spin_lock_init(&local->baplock);
3344         spin_lock_init(&local->lock);
3345         init_MUTEX(&local->rid_bap_sem);
3346
3347         if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES)
3348                 card_idx = 0;
3349         local->card_idx = card_idx;
3350
3351         len = strlen(essid);
3352         memcpy(local->essid, essid,
3353                len > MAX_SSID_LEN ? MAX_SSID_LEN : len);
3354         local->essid[MAX_SSID_LEN] = '\0';
3355         i = GET_INT_PARM(iw_mode, card_idx);
3356         if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) ||
3357             i == IW_MODE_MONITOR) {
3358                 local->iw_mode = i;
3359         } else {
3360                 printk(KERN_WARNING "prism2: Unknown iw_mode %d; using "
3361                        "IW_MODE_MASTER\n", i);
3362                 local->iw_mode = IW_MODE_MASTER;
3363         }
3364         local->channel = GET_INT_PARM(channel, card_idx);
3365         local->beacon_int = GET_INT_PARM(beacon_int, card_idx);
3366         local->dtim_period = GET_INT_PARM(dtim_period, card_idx);
3367         local->wds_max_connections = 16;
3368         local->tx_control = HFA384X_TX_CTRL_FLAGS;
3369         local->manual_retry_count = -1;
3370         local->rts_threshold = 2347;
3371         local->fragm_threshold = 2346;
3372         local->rssi_to_dBm = 100; /* default; to be overriden by
3373                                    * cnfDbmAdjust, if available */
3374         local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY;
3375         local->sram_type = -1;
3376 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
3377         local->bus_master_threshold_rx = GET_INT_PARM(bus_master_threshold_rx,
3378                                                       card_idx);
3379         local->bus_master_threshold_tx = GET_INT_PARM(bus_master_threshold_tx,
3380                                                       card_idx);
3381 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
3382
3383         /* Initialize task queue structures */
3384         INIT_WORK(&local->reset_queue, handle_reset_queue, local);
3385         INIT_WORK(&local->set_multicast_list_queue,
3386                   hostap_set_multicast_list_queue, local->dev);
3387
3388         INIT_WORK(&local->set_tim_queue, handle_set_tim_queue, local);
3389         INIT_LIST_HEAD(&local->set_tim_list);
3390         spin_lock_init(&local->set_tim_lock);
3391
3392         INIT_WORK(&local->comms_qual_update, handle_comms_qual_update, local);
3393
3394         /* Initialize tasklets for handling hardware IRQ related operations
3395          * outside hw IRQ handler */
3396 #define HOSTAP_TASKLET_INIT(q, f, d) \
3397 do { memset((q), 0, sizeof(*(q))); (q)->func = (f); (q)->data = (d); } \
3398 while (0)
3399         HOSTAP_TASKLET_INIT(&local->bap_tasklet, hostap_bap_tasklet,
3400                             (unsigned long) local);
3401
3402         HOSTAP_TASKLET_INIT(&local->info_tasklet, hostap_info_tasklet,
3403                             (unsigned long) local);
3404         hostap_info_init(local);
3405
3406         HOSTAP_TASKLET_INIT(&local->rx_tasklet,
3407                             hostap_rx_tasklet, (unsigned long) local);
3408         skb_queue_head_init(&local->rx_list);
3409
3410         HOSTAP_TASKLET_INIT(&local->sta_tx_exc_tasklet,
3411                             hostap_sta_tx_exc_tasklet, (unsigned long) local);
3412         skb_queue_head_init(&local->sta_tx_exc_list);
3413
3414         INIT_LIST_HEAD(&local->cmd_queue);
3415         init_waitqueue_head(&local->hostscan_wq);
3416         INIT_LIST_HEAD(&local->crypt_deinit_list);
3417         init_timer(&local->crypt_deinit_timer);
3418         local->crypt_deinit_timer.data = (unsigned long) local;
3419         local->crypt_deinit_timer.function = prism2_crypt_deinit_handler;
3420
3421         init_timer(&local->passive_scan_timer);
3422         local->passive_scan_timer.data = (unsigned long) local;
3423         local->passive_scan_timer.function = hostap_passive_scan;
3424
3425         init_timer(&local->tick_timer);
3426         local->tick_timer.data = (unsigned long) local;
3427         local->tick_timer.function = hostap_tick_timer;
3428         local->tick_timer.expires = jiffies + 2 * HZ;
3429         add_timer(&local->tick_timer);
3430
3431         INIT_LIST_HEAD(&local->bss_list);
3432
3433         hostap_setup_dev(dev, local, 1);
3434         local->saved_eth_header_parse = dev->hard_header_parse;
3435
3436         dev->hard_start_xmit = hostap_master_start_xmit;
3437         dev->type = ARPHRD_IEEE80211;
3438         dev->hard_header_parse = hostap_80211_header_parse;
3439
3440         rtnl_lock();
3441         ret = dev_alloc_name(dev, "wifi%d");
3442         if (ret >= 0)
3443                 ret = register_netdevice(dev);
3444         rtnl_unlock();
3445         if (ret < 0) {
3446                 printk(KERN_WARNING "%s: register netdevice failed!\n",
3447                        dev_info);
3448                 goto fail;
3449         }
3450         printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name);
3451
3452 #ifndef PRISM2_NO_PROCFS_DEBUG
3453         create_proc_read_entry("registers", 0, local->proc,
3454                                prism2_registers_proc_read, local);
3455 #endif /* PRISM2_NO_PROCFS_DEBUG */
3456
3457         hostap_init_data(local);
3458         return dev;
3459
3460  fail:
3461 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
3462         kfree(local->bus_m0_buf);
3463 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
3464         free_netdev(dev);
3465         return NULL;
3466 }
3467
3468
3469 static int hostap_hw_ready(struct net_device *dev)
3470 {
3471         struct hostap_interface *iface;
3472         struct local_info *local;
3473
3474         iface = netdev_priv(dev);
3475         local = iface->local;
3476         local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0,
3477                                            "", dev_template);
3478
3479         if (local->ddev) {
3480                 if (local->iw_mode == IW_MODE_INFRA ||
3481                     local->iw_mode == IW_MODE_ADHOC) {
3482                         netif_carrier_off(local->dev);
3483                         netif_carrier_off(local->ddev);
3484                 }
3485                 hostap_init_proc(local);
3486                 hostap_init_ap_proc(local);
3487                 return 0;
3488         }
3489
3490         return -1;
3491 }
3492
3493
3494 static void prism2_free_local_data(struct net_device *dev)
3495 {
3496         struct hostap_tx_callback_info *tx_cb, *tx_cb_prev;
3497         int i;
3498         struct hostap_interface *iface;
3499         struct local_info *local;
3500         struct list_head *ptr, *n;
3501
3502         if (dev == NULL)
3503                 return;
3504
3505         iface = netdev_priv(dev);
3506         local = iface->local;
3507
3508         flush_scheduled_work();
3509
3510         if (timer_pending(&local->crypt_deinit_timer))
3511                 del_timer(&local->crypt_deinit_timer);
3512         prism2_crypt_deinit_entries(local, 1);
3513
3514         if (timer_pending(&local->passive_scan_timer))
3515                 del_timer(&local->passive_scan_timer);
3516
3517         if (timer_pending(&local->tick_timer))
3518                 del_timer(&local->tick_timer);
3519
3520         prism2_clear_cmd_queue(local);
3521
3522         skb_queue_purge(&local->info_list);
3523         skb_queue_purge(&local->rx_list);
3524         skb_queue_purge(&local->sta_tx_exc_list);
3525
3526         if (local->dev_enabled)
3527                 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
3528
3529         for (i = 0; i < WEP_KEYS; i++) {
3530                 struct prism2_crypt_data *crypt = local->crypt[i];
3531                 if (crypt) {
3532                         if (crypt->ops)
3533                                 crypt->ops->deinit(crypt->priv);
3534                         kfree(crypt);
3535                         local->crypt[i] = NULL;
3536                 }
3537         }
3538
3539         if (local->ap != NULL)
3540                 hostap_free_data(local->ap);
3541
3542 #ifndef PRISM2_NO_PROCFS_DEBUG
3543         if (local->proc != NULL)
3544                 remove_proc_entry("registers", local->proc);
3545 #endif /* PRISM2_NO_PROCFS_DEBUG */
3546         hostap_remove_proc(local);
3547
3548         tx_cb = local->tx_callback;
3549         while (tx_cb != NULL) {
3550                 tx_cb_prev = tx_cb;
3551                 tx_cb = tx_cb->next;
3552                 kfree(tx_cb_prev);
3553         }
3554
3555         hostap_set_hostapd(local, 0, 0);
3556         hostap_set_hostapd_sta(local, 0, 0);
3557
3558         for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
3559                 if (local->frag_cache[i].skb != NULL)
3560                         dev_kfree_skb(local->frag_cache[i].skb);
3561         }
3562
3563 #ifdef PRISM2_DOWNLOAD_SUPPORT
3564         prism2_download_free_data(local->dl_pri);
3565         prism2_download_free_data(local->dl_sec);
3566 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3567
3568         list_for_each_safe(ptr, n, &local->hostap_interfaces) {
3569                 iface = list_entry(ptr, struct hostap_interface, list);
3570                 if (iface->type == HOSTAP_INTERFACE_MASTER) {
3571                         /* special handling for this interface below */
3572                         continue;
3573                 }
3574                 hostap_remove_interface(iface->dev, 0, 1);
3575         }
3576
3577         prism2_clear_set_tim_queue(local);
3578
3579         list_for_each_safe(ptr, n, &local->bss_list) {
3580                 struct hostap_bss_info *bss =
3581                         list_entry(ptr, struct hostap_bss_info, list);
3582                 kfree(bss);
3583         }
3584
3585 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
3586         kfree(local->bus_m0_buf);
3587 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
3588         kfree(local->pda);
3589         kfree(local->last_scan_results);
3590         kfree(local->generic_elem);
3591
3592         unregister_netdev(local->dev);
3593         free_netdev(local->dev);
3594 }
3595
3596
3597 #ifndef PRISM2_PLX
3598 static void prism2_suspend(struct net_device *dev)
3599 {
3600         struct hostap_interface *iface;
3601         struct local_info *local;
3602         union iwreq_data wrqu;
3603
3604         iface = dev->priv;
3605         local = iface->local;
3606
3607         /* Send disconnect event, e.g., to trigger reassociation after resume
3608          * if wpa_supplicant is used. */
3609         memset(&wrqu, 0, sizeof(wrqu));
3610         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
3611         wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
3612
3613         /* Disable hardware and firmware */
3614         prism2_hw_shutdown(dev, 0);
3615 }
3616 #endif /* PRISM2_PLX */
3617
3618
3619 /* These might at some point be compiled separately and used as separate
3620  * kernel modules or linked into one */
3621 #ifdef PRISM2_DOWNLOAD_SUPPORT
3622 #include "hostap_download.c"
3623 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3624
3625 #ifdef PRISM2_CALLBACK
3626 /* External hostap_callback.c file can be used to, e.g., blink activity led.
3627  * This can use platform specific code and must define prism2_callback()
3628  * function (if PRISM2_CALLBACK is not defined, these function calls are not
3629  * used. */
3630 #include "hostap_callback.c"
3631 #endif /* PRISM2_CALLBACK */