drivers/net/wireless/iwlwifi/iwl-4965.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/version.h>
  30 #include <linux/init.h>
  31 #include <linux/pci.h>
  32 #include <linux/dma-mapping.h>
  33 #include <linux/delay.h>
  34 #include <linux/skbuff.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/wireless.h>
  37 #include <net/mac80211.h>
  38 #include <linux/etherdevice.h>
  39 #include <asm/unaligned.h>
  40
  41 #include "iwl-eeprom.h"
  42 #include "iwl-dev.h"
  43 #include "iwl-core.h"
  44 #include "iwl-io.h"
  45 #include "iwl-helpers.h"
  46 #include "iwl-calib.h"
  47 #include "iwl-sta.h"
  48
  49 static int iwl4965_send_tx_power(struct iwl_priv *priv);
  50 static int iwl4965_hw_get_temperature(const struct iwl_priv *priv);
  51
  52 /* Change firmware file name, using "-" and incrementing number,
  53  *   *only* when uCode interface or architecture changes so that it
  54  *   is not compatible with earlier drivers.
  55  * This number will also appear in << 8 position of 1st dword of uCode file */
  56 #define IWL4965_UCODE_API "-2"
  57
  58
  59 /* module parameters */
  60 static struct iwl_mod_params iwl4965_mod_params = {
  61         .num_of_queues = IWL49_NUM_QUEUES,
  62         .num_of_ampdu_queues = IWL49_NUM_AMPDU_QUEUES,
  63         .enable_qos = 1,
  64         .amsdu_size_8K = 1,
  65         .restart_fw = 1,
  66         /* the rest are 0 by default */
  67 };
  68
  69 /* check contents of special bootstrap uCode SRAM */
  70 static int iwl4965_verify_bsm(struct iwl_priv *priv)
  71 {
  72         __le32 *image = priv->ucode_boot.v_addr;
  73         u32 len = priv->ucode_boot.len;
  74         u32 reg;
  75         u32 val;
  76
  77         IWL_DEBUG_INFO("Begin verify bsm\n");
  78
  79         /* verify BSM SRAM contents */
  80         val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
  81         for (reg = BSM_SRAM_LOWER_BOUND;
  82              reg < BSM_SRAM_LOWER_BOUND + len;
  83              reg += sizeof(u32), image++) {
  84                 val = iwl_read_prph(priv, reg);
  85                 if (val != le32_to_cpu(*image)) {
  86                         IWL_ERROR("BSM uCode verification failed at "
  87                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
  88                                   BSM_SRAM_LOWER_BOUND,
  89                                   reg - BSM_SRAM_LOWER_BOUND, len,
  90                                   val, le32_to_cpu(*image));
  91                         return -EIO;
  92                 }
  93         }
  94
  95         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
  96
  97         return 0;
  98 }
  99
 100 /**
 101  * iwl4965_load_bsm - Load bootstrap instructions
 102  *
 103  * BSM operation:
 104  *
 105  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
 106  * in special SRAM that does not power down during RFKILL.  When powering back
 107  * up after power-saving sleeps (or during initial uCode load), the BSM loads
 108  * the bootstrap program into the on-board processor, and starts it.
 109  *
 110  * The bootstrap program loads (via DMA) instructions and data for a new
 111  * program from host DRAM locations indicated by the host driver in the
 112  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
 113  * automatically.
 114  *
 115  * When initializing the NIC, the host driver points the BSM to the
 116  * "initialize" uCode image.  This uCode sets up some internal data, then
 117  * notifies host via "initialize alive" that it is complete.
 118  *
 119  * The host then replaces the BSM_DRAM_* pointer values to point to the
 120  * normal runtime uCode instructions and a backup uCode data cache buffer
 121  * (filled initially with starting data values for the on-board processor),
 122  * then triggers the "initialize" uCode to load and launch the runtime uCode,
 123  * which begins normal operation.
 124  *
 125  * When doing a power-save shutdown, runtime uCode saves data SRAM into
 126  * the backup data cache in DRAM before SRAM is powered down.
 127  *
 128  * When powering back up, the BSM loads the bootstrap program.  This reloads
 129  * the runtime uCode instructions and the backup data cache into SRAM,
 130  * and re-launches the runtime uCode from where it left off.
 131  */
 132 static int iwl4965_load_bsm(struct iwl_priv *priv)
 133 {
 134         __le32 *image = priv->ucode_boot.v_addr;
 135         u32 len = priv->ucode_boot.len;
 136         dma_addr_t pinst;
 137         dma_addr_t pdata;
 138         u32 inst_len;
 139         u32 data_len;
 140         int i;
 141         u32 done;
 142         u32 reg_offset;
 143         int ret;
 144
 145         IWL_DEBUG_INFO("Begin load bsm\n");
 146
 147         priv->ucode_type = UCODE_RT;
 148
 149         /* make sure bootstrap program is no larger than BSM's SRAM size */
 150         if (len > IWL_MAX_BSM_SIZE)
 151                 return -EINVAL;
 152
 153         /* Tell bootstrap uCode where to find the "Initialize" uCode
 154          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
 155          * NOTE:  iwl_init_alive_start() will replace these values,
 156          *        after the "initialize" uCode has run, to point to
 157          *        runtime/protocol instructions and backup data cache.
 158          */
 159         pinst = priv->ucode_init.p_addr >> 4;
 160         pdata = priv->ucode_init_data.p_addr >> 4;
 161         inst_len = priv->ucode_init.len;
 162         data_len = priv->ucode_init_data.len;
 163
 164         ret = iwl_grab_nic_access(priv);
 165         if (ret)
 166                 return ret;
 167
 168         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 169         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 170         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
 171         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
 172
 173         /* Fill BSM memory with bootstrap instructions */
 174         for (reg_offset = BSM_SRAM_LOWER_BOUND;
 175              reg_offset < BSM_SRAM_LOWER_BOUND + len;
 176              reg_offset += sizeof(u32), image++)
 177                 _iwl_write_prph(priv, reg_offset, le32_to_cpu(*image));
 178
 179         ret = iwl4965_verify_bsm(priv);
 180         if (ret) {
 181                 iwl_release_nic_access(priv);
 182                 return ret;
 183         }
 184
 185         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
 186         iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
 187         iwl_write_prph(priv, BSM_WR_MEM_DST_REG, RTC_INST_LOWER_BOUND);
 188         iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
 189
 190         /* Load bootstrap code into instruction SRAM now,
 191          *   to prepare to load "initialize" uCode */
 192         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);
 193
 194         /* Wait for load of bootstrap uCode to finish */
 195         for (i = 0; i < 100; i++) {
 196                 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
 197                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
 198                         break;
 199                 udelay(10);
 200         }
 201         if (i < 100)
 202                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
 203         else {
 204                 IWL_ERROR("BSM write did not complete!\n");
 205                 return -EIO;
 206         }
 207
 208         /* Enable future boot loads whenever power management unit triggers it
 209          *   (e.g. when powering back up after power-save shutdown) */
 210         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
 211
 212         iwl_release_nic_access(priv);
 213
 214         return 0;
 215 }
 216
 217 /**
 218  * iwl4965_set_ucode_ptrs - Set uCode address location
 219  *
 220  * Tell initialization uCode where to find runtime uCode.
 221  *
 222  * BSM registers initially contain pointers to initialization uCode.
 223  * We need to replace them to load runtime uCode inst and data,
 224  * and to save runtime data when powering down.
 225  */
 226 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
 227 {
 228         dma_addr_t pinst;
 229         dma_addr_t pdata;
 230         unsigned long flags;
 231         int ret = 0;
 232
 233         /* bits 35:4 for 4965 */
 234         pinst = priv->ucode_code.p_addr >> 4;
 235         pdata = priv->ucode_data_backup.p_addr >> 4;
 236
 237         spin_lock_irqsave(&priv->lock, flags);
 238         ret = iwl_grab_nic_access(priv);
 239         if (ret) {
 240                 spin_unlock_irqrestore(&priv->lock, flags);
 241                 return ret;
 242         }
 243
 244         /* Tell bootstrap uCode where to find image to load */
 245         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 246         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 247         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
 248                                  priv->ucode_data.len);
 249
 250         /* Inst bytecount must be last to set up, bit 31 signals uCode
 251          *   that all new ptr/size info is in place */
 252         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
 253                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
 254         iwl_release_nic_access(priv);
 255
 256         spin_unlock_irqrestore(&priv->lock, flags);
 257
 258         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
 259
 260         return ret;
 261 }
 262
 263 /**
 264  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
 265  *
 266  * Called after REPLY_ALIVE notification received from "initialize" uCode.
 267  *
 268  * The 4965 "initialize" ALIVE reply contains calibration data for:
 269  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
 270  *   (3945 does not contain this data).
 271  *
 272  * Tell "initialize" uCode to go ahead and load the runtime uCode.
 273 */
 274 static void iwl4965_init_alive_start(struct iwl_priv *priv)
 275 {
 276         /* Check alive response for "valid" sign from uCode */
 277         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
 278                 /* We had an error bringing up the hardware, so take it
 279                  * all the way back down so we can try again */
 280                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
 281                 goto restart;
 282         }
 283
 284         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
 285          * This is a paranoid check, because we would not have gotten the
 286          * "initialize" alive if code weren't properly loaded.  */
 287         if (iwl_verify_ucode(priv)) {
 288                 /* Runtime instruction load was bad;
 289                  * take it all the way back down so we can try again */
 290                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
 291                 goto restart;
 292         }
 293
 294         /* Calculate temperature */
 295         priv->temperature = iwl4965_hw_get_temperature(priv);
 296
 297         /* Send pointers to protocol/runtime uCode image ... init code will
 298          * load and launch runtime uCode, which will send us another "Alive"
 299          * notification. */
 300         IWL_DEBUG_INFO("Initialization Alive received.\n");
 301         if (iwl4965_set_ucode_ptrs(priv)) {
 302                 /* Runtime instruction load won't happen;
 303                  * take it all the way back down so we can try again */
 304                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
 305                 goto restart;
 306         }
 307         return;
 308
 309 restart:
 310         queue_work(priv->workqueue, &priv->restart);
 311 }
 312
 313 static int is_fat_channel(__le32 rxon_flags)
 314 {
 315         return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
 316                 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
 317 }
 318
 319 /*
 320  * EEPROM handlers
 321  */
 322
 323 static int iwl4965_eeprom_check_version(struct iwl_priv *priv)
 324 {
 325         u16 eeprom_ver;
 326         u16 calib_ver;
 327
 328         eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
 329
 330         calib_ver = iwl_eeprom_query16(priv, EEPROM_4965_CALIB_VERSION_OFFSET);
 331
 332         if (eeprom_ver < EEPROM_4965_EEPROM_VERSION ||
 333             calib_ver < EEPROM_4965_TX_POWER_VERSION)
 334                 goto err;
 335
 336         return 0;
 337 err:
 338         IWL_ERROR("Unsuported EEPROM VER=0x%x < 0x%x CALIB=0x%x < 0x%x\n",
 339                   eeprom_ver, EEPROM_4965_EEPROM_VERSION,
 340                   calib_ver, EEPROM_4965_TX_POWER_VERSION);
 341         return -EINVAL;
 342
 343 }
 344
 345 /*
 346  * Activate/Deactivat Tx DMA/FIFO channels according tx fifos mask
 347  * must be called under priv->lock and mac access
 348  */
 349 static void iwl4965_txq_set_sched(struct iwl_priv *priv, u32 mask)
 350 {
 351         iwl_write_prph(priv, IWL49_SCD_TXFACT, mask);
 352 }
 353
 354 static int iwl4965_apm_init(struct iwl_priv *priv)
 355 {
 356         int ret = 0;
 357
 358         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 359                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 360
 361         /* disable L0s without affecting L1 :don't wait for ICH L0s bug W/A) */
 362         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 363                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
 364
 365         /* set "initialization complete" bit to move adapter
 366          * D0U* --> D0A* state */
 367         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 368
 369         /* wait for clock stabilization */
 370         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
 371                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 372                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 373         if (ret < 0) {
 374                 IWL_DEBUG_INFO("Failed to init the card\n");
 375                 goto out;
 376         }
 377
 378         ret = iwl_grab_nic_access(priv);
 379         if (ret)
 380                 goto out;
 381
 382         /* enable DMA */
 383         iwl_write_prph(priv, APMG_CLK_CTRL_REG, APMG_CLK_VAL_DMA_CLK_RQT |
 384                                                 APMG_CLK_VAL_BSM_CLK_RQT);
 385
 386         udelay(20);
 387
 388         /* disable L1-Active */
 389         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 390                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 391
 392         iwl_release_nic_access(priv);
 393 out:
 394         return ret;
 395 }
 396
 397
 398 static void iwl4965_nic_config(struct iwl_priv *priv)
 399 {
 400         unsigned long flags;
 401         u32 val;
 402         u16 radio_cfg;
 403         u8 val_link;
 404
 405         spin_lock_irqsave(&priv->lock, flags);
 406
 407         if ((priv->rev_id & 0x80) == 0x80 && (priv->rev_id & 0x7f) < 8) {
 408                 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 409                 /* Enable No Snoop field */
 410                 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
 411                                        val & ~(1 << 11));
 412         }
 413
 414         pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
 415
 416         /* L1 is enabled by BIOS */
 417         if ((val_link & PCI_LINK_VAL_L1_EN) == PCI_LINK_VAL_L1_EN)
 418                 /* diable L0S disabled L1A enabled */
 419                 iwl_set_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 420         else
 421                 /* L0S enabled L1A disabled */
 422                 iwl_clear_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 423
 424         radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
 425
 426         /* write radio config values to register */
 427         if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) == EEPROM_4965_RF_CFG_TYPE_MAX)
 428                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 429                             EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
 430                             EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
 431                             EEPROM_RF_CFG_DASH_MSK(radio_cfg));
 432
 433         /* set CSR_HW_CONFIG_REG for uCode use */
 434         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 435                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 436                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
 437
 438         priv->calib_info = (struct iwl_eeprom_calib_info *)
 439                 iwl_eeprom_query_addr(priv, EEPROM_4965_CALIB_TXPOWER_OFFSET);
 440
 441         spin_unlock_irqrestore(&priv->lock, flags);
 442 }
 443
 444 static int iwl4965_apm_stop_master(struct iwl_priv *priv)
 445 {
 446         int ret = 0;
 447         unsigned long flags;
 448
 449         spin_lock_irqsave(&priv->lock, flags);
 450
 451         /* set stop master bit */
 452         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 453
 454         ret = iwl_poll_bit(priv, CSR_RESET,
 455                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
 456                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 457         if (ret < 0)
 458                 goto out;
 459
 460 out:
 461         spin_unlock_irqrestore(&priv->lock, flags);
 462         IWL_DEBUG_INFO("stop master\n");
 463
 464         return ret;
 465 }
 466
 467 static void iwl4965_apm_stop(struct iwl_priv *priv)
 468 {
 469         unsigned long flags;
 470
 471         iwl4965_apm_stop_master(priv);
 472
 473         spin_lock_irqsave(&priv->lock, flags);
 474
 475         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 476
 477         udelay(10);
 478
 479         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 480         spin_unlock_irqrestore(&priv->lock, flags);
 481 }
 482
 483 static int iwl4965_apm_reset(struct iwl_priv *priv)
 484 {
 485         int ret = 0;
 486         unsigned long flags;
 487
 488         iwl4965_apm_stop_master(priv);
 489
 490         spin_lock_irqsave(&priv->lock, flags);
 491
 492         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 493
 494         udelay(10);
 495
 496         /* FIXME: put here L1A -L0S w/a */
 497
 498         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 499
 500         ret = iwl_poll_bit(priv, CSR_RESET,
 501                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 502                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
 503
 504         if (ret)
 505                 goto out;
 506
 507         udelay(10);
 508
 509         ret = iwl_grab_nic_access(priv);
 510         if (ret)
 511                 goto out;
 512         /* Enable DMA and BSM Clock */
 513         iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT |
 514                                               APMG_CLK_VAL_BSM_CLK_RQT);
 515
 516         udelay(10);
 517
 518         /* disable L1A */
 519         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 520                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 521
 522         iwl_release_nic_access(priv);
 523
 524         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 525         wake_up_interruptible(&priv->wait_command_queue);
 526
 527 out:
 528         spin_unlock_irqrestore(&priv->lock, flags);
 529
 530         return ret;
 531 }
 532
 533 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
 534  * Called after every association, but this runs only once!
 535  *  ... once chain noise is calibrated the first time, it's good forever.  */
 536 static void iwl4965_chain_noise_reset(struct iwl_priv *priv)
 537 {
 538         struct iwl_chain_noise_data *data = &(priv->chain_noise_data);
 539
 540         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
 541                 struct iwl4965_calibration_cmd cmd;
 542
 543                 memset(&cmd, 0, sizeof(cmd));
 544                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
 545                 cmd.diff_gain_a = 0;
 546                 cmd.diff_gain_b = 0;
 547                 cmd.diff_gain_c = 0;
 548                 if (iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 549                                  sizeof(cmd), &cmd))
 550                         IWL_ERROR("Could not send REPLY_PHY_CALIBRATION_CMD\n");
 551                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
 552                 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
 553         }
 554 }
 555
 556 static void iwl4965_gain_computation(struct iwl_priv *priv,
 557                 u32 *average_noise,
 558                 u16 min_average_noise_antenna_i,
 559                 u32 min_average_noise)
 560 {
 561         int i, ret;
 562         struct iwl_chain_noise_data *data = &priv->chain_noise_data;
 563
 564         data->delta_gain_code[min_average_noise_antenna_i] = 0;
 565
 566         for (i = 0; i < NUM_RX_CHAINS; i++) {
 567                 s32 delta_g = 0;
 568
 569                 if (!(data->disconn_array[i]) &&
 570                     (data->delta_gain_code[i] ==
 571                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
 572                         delta_g = average_noise[i] - min_average_noise;
 573                         data->delta_gain_code[i] = (u8)((delta_g * 10) / 15);
 574                         data->delta_gain_code[i] =
 575                                 min(data->delta_gain_code[i],
 576                                 (u8) CHAIN_NOISE_MAX_DELTA_GAIN_CODE);
 577
 578                         data->delta_gain_code[i] =
 579                                 (data->delta_gain_code[i] | (1 << 2));
 580                 } else {
 581                         data->delta_gain_code[i] = 0;
 582                 }
 583         }
 584         IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
 585                      data->delta_gain_code[0],
 586                      data->delta_gain_code[1],
 587                      data->delta_gain_code[2]);
 588
 589         /* Differential gain gets sent to uCode only once */
 590         if (!data->radio_write) {
 591                 struct iwl4965_calibration_cmd cmd;
 592                 data->radio_write = 1;
 593
 594                 memset(&cmd, 0, sizeof(cmd));
 595                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
 596                 cmd.diff_gain_a = data->delta_gain_code[0];
 597                 cmd.diff_gain_b = data->delta_gain_code[1];
 598                 cmd.diff_gain_c = data->delta_gain_code[2];
 599                 ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 600                                       sizeof(cmd), &cmd);
 601                 if (ret)
 602                         IWL_DEBUG_CALIB("fail sending cmd "
 603                                      "REPLY_PHY_CALIBRATION_CMD \n");
 604
 605                 /* TODO we might want recalculate
 606                  * rx_chain in rxon cmd */
 607
 608                 /* Mark so we run this algo only once! */
 609                 data->state = IWL_CHAIN_NOISE_CALIBRATED;
 610         }
 611         data->chain_noise_a = 0;
 612         data->chain_noise_b = 0;
 613         data->chain_noise_c = 0;
 614         data->chain_signal_a = 0;
 615         data->chain_signal_b = 0;
 616         data->chain_signal_c = 0;
 617         data->beacon_count = 0;
 618 }
 619
 620 static void iwl4965_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 621                         __le32 *tx_flags)
 622 {
 623         if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) {
 624                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 625                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 626         } else if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
 627                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 628                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 629         }
 630 }
 631
 632 static void iwl4965_bg_txpower_work(struct work_struct *work)
 633 {
 634         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 635                         txpower_work);
 636
 637         /* If a scan happened to start before we got here
 638          * then just return; the statistics notification will
 639          * kick off another scheduled work to compensate for
 640          * any temperature delta we missed here. */
 641         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 642             test_bit(STATUS_SCANNING, &priv->status))
 643                 return;
 644
 645         mutex_lock(&priv->mutex);
 646
 647         /* Regardless of if we are assocaited, we must reconfigure the
 648          * TX power since frames can be sent on non-radar channels while
 649          * not associated */
 650         iwl4965_send_tx_power(priv);
 651
 652         /* Update last_temperature to keep is_calib_needed from running
 653          * when it isn't needed... */
 654         priv->last_temperature = priv->temperature;
 655
 656         mutex_unlock(&priv->mutex);
 657 }
 658
 659 /*
 660  * Acquire priv->lock before calling this function !
 661  */
 662 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
 663 {
 664         iwl_write_direct32(priv, HBUS_TARG_WRPTR,
 665                              (index & 0xff) | (txq_id << 8));
 666         iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(txq_id), index);
 667 }
 668
 669 /**
 670  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
 671  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
 672  * @scd_retry: (1) Indicates queue will be used in aggregation mode
 673  *
 674  * NOTE:  Acquire priv->lock before calling this function !
 675  */
 676 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
 677                                         struct iwl_tx_queue *txq,
 678                                         int tx_fifo_id, int scd_retry)
 679 {
 680         int txq_id = txq->q.id;
 681
 682         /* Find out whether to activate Tx queue */
 683         int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
 684
 685         /* Set up and activate */
 686         iwl_write_prph(priv, IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
 687                          (active << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
 688                          (tx_fifo_id << IWL49_SCD_QUEUE_STTS_REG_POS_TXF) |
 689                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_WSL) |
 690                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
 691                          IWL49_SCD_QUEUE_STTS_REG_MSK);
 692
 693         txq->sched_retry = scd_retry;
 694
 695         IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
 696                        active ? "Activate" : "Deactivate",
 697                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
 698 }
 699
 700 static const u16 default_queue_to_tx_fifo[] = {
 701         IWL_TX_FIFO_AC3,
 702         IWL_TX_FIFO_AC2,
 703         IWL_TX_FIFO_AC1,
 704         IWL_TX_FIFO_AC0,
 705         IWL49_CMD_FIFO_NUM,
 706         IWL_TX_FIFO_HCCA_1,
 707         IWL_TX_FIFO_HCCA_2
 708 };
 709
 710 static int iwl4965_alive_notify(struct iwl_priv *priv)
 711 {
 712         u32 a;
 713         int i = 0;
 714         unsigned long flags;
 715         int ret;
 716
 717         spin_lock_irqsave(&priv->lock, flags);
 718
 719         ret = iwl_grab_nic_access(priv);
 720         if (ret) {
 721                 spin_unlock_irqrestore(&priv->lock, flags);
 722                 return ret;
 723         }
 724
 725         /* Clear 4965's internal Tx Scheduler data base */
 726         priv->scd_base_addr = iwl_read_prph(priv, IWL49_SCD_SRAM_BASE_ADDR);
 727         a = priv->scd_base_addr + IWL49_SCD_CONTEXT_DATA_OFFSET;
 728         for (; a < priv->scd_base_addr + IWL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
 729                 iwl_write_targ_mem(priv, a, 0);
 730         for (; a < priv->scd_base_addr + IWL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
 731                 iwl_write_targ_mem(priv, a, 0);
 732         for (; a < sizeof(u16) * priv->hw_params.max_txq_num; a += 4)
 733                 iwl_write_targ_mem(priv, a, 0);
 734
 735         /* Tel 4965 where to find Tx byte count tables */
 736         iwl_write_prph(priv, IWL49_SCD_DRAM_BASE_ADDR,
 737                 (priv->shared_phys +
 738                  offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
 739
 740         /* Disable chain mode for all queues */
 741         iwl_write_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, 0);
 742
 743         /* Initialize each Tx queue (including the command queue) */
 744         for (i = 0; i < priv->hw_params.max_txq_num; i++) {
 745
 746                 /* TFD circular buffer read/write indexes */
 747                 iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(i), 0);
 748                 iwl_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
 749
 750                 /* Max Tx Window size for Scheduler-ACK mode */
 751                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 752                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i),
 753                                 (SCD_WIN_SIZE <<
 754                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
 755                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
 756
 757                 /* Frame limit */
 758                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 759                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
 760                                 sizeof(u32),
 761                                 (SCD_FRAME_LIMIT <<
 762                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
 763                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
 764
 765         }
 766         iwl_write_prph(priv, IWL49_SCD_INTERRUPT_MASK,
 767                                  (1 << priv->hw_params.max_txq_num) - 1);
 768
 769         /* Activate all Tx DMA/FIFO channels */
 770         priv->cfg->ops->lib->txq_set_sched(priv, IWL_MASK(0, 7));
 771
 772         iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
 773
 774         /* Map each Tx/cmd queue to its corresponding fifo */
 775         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
 776                 int ac = default_queue_to_tx_fifo[i];
 777                 iwl_txq_ctx_activate(priv, i);
 778                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
 779         }
 780
 781         iwl_release_nic_access(priv);
 782         spin_unlock_irqrestore(&priv->lock, flags);
 783
 784         return ret;
 785 }
 786
 787 static struct iwl_sensitivity_ranges iwl4965_sensitivity = {
 788         .min_nrg_cck = 97,
 789         .max_nrg_cck = 0,
 790
 791         .auto_corr_min_ofdm = 85,
 792         .auto_corr_min_ofdm_mrc = 170,
 793         .auto_corr_min_ofdm_x1 = 105,
 794         .auto_corr_min_ofdm_mrc_x1 = 220,
 795
 796         .auto_corr_max_ofdm = 120,
 797         .auto_corr_max_ofdm_mrc = 210,
 798         .auto_corr_max_ofdm_x1 = 140,
 799         .auto_corr_max_ofdm_mrc_x1 = 270,
 800
 801         .auto_corr_min_cck = 125,
 802         .auto_corr_max_cck = 200,
 803         .auto_corr_min_cck_mrc = 200,
 804         .auto_corr_max_cck_mrc = 400,
 805
 806         .nrg_th_cck = 100,
 807         .nrg_th_ofdm = 100,
 808 };
 809
 810 /**
 811  * iwl4965_hw_set_hw_params
 812  *
 813  * Called when initializing driver
 814  */
 815 static int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
 816 {
 817
 818         if ((priv->cfg->mod_params->num_of_queues > IWL49_NUM_QUEUES) ||
 819             (priv->cfg->mod_params->num_of_queues < IWL_MIN_NUM_QUEUES)) {
 820                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
 821                           IWL_MIN_NUM_QUEUES, IWL49_NUM_QUEUES);
 822                 return -EINVAL;
 823         }
 824
 825         priv->hw_params.max_txq_num = priv->cfg->mod_params->num_of_queues;
 826         priv->hw_params.first_ampdu_q = IWL49_FIRST_AMPDU_QUEUE;
 827         priv->hw_params.max_stations = IWL4965_STATION_COUNT;
 828         priv->hw_params.bcast_sta_id = IWL4965_BROADCAST_ID;
 829         priv->hw_params.max_data_size = IWL49_RTC_DATA_SIZE;
 830         priv->hw_params.max_inst_size = IWL49_RTC_INST_SIZE;
 831         priv->hw_params.max_bsm_size = BSM_SRAM_SIZE;
 832         priv->hw_params.fat_channel = BIT(IEEE80211_BAND_5GHZ);
 833
 834         priv->hw_params.tx_chains_num = 2;
 835         priv->hw_params.rx_chains_num = 2;
 836         priv->hw_params.valid_tx_ant = ANT_A | ANT_B;
 837         priv->hw_params.valid_rx_ant = ANT_A | ANT_B;
 838         priv->hw_params.ct_kill_threshold = CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD);
 839
 840         priv->hw_params.sens = &iwl4965_sensitivity;
 841
 842         return 0;
 843 }
 844
 845 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
 846 {
 847         s32 sign = 1;
 848
 849         if (num < 0) {
 850                 sign = -sign;
 851                 num = -num;
 852         }
 853         if (denom < 0) {
 854                 sign = -sign;
 855                 denom = -denom;
 856         }
 857         *res = 1;
 858         *res = ((num * 2 + denom) / (denom * 2)) * sign;
 859
 860         return 1;
 861 }
 862
 863 /**
 864  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
 865  *
 866  * Determines power supply voltage compensation for txpower calculations.
 867  * Returns number of 1/2-dB steps to subtract from gain table index,
 868  * to compensate for difference between power supply voltage during
 869  * factory measurements, vs. current power supply voltage.
 870  *
 871  * Voltage indication is higher for lower voltage.
 872  * Lower voltage requires more gain (lower gain table index).
 873  */
 874 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
 875                                             s32 current_voltage)
 876 {
 877         s32 comp = 0;
 878
 879         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
 880             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
 881                 return 0;
 882
 883         iwl4965_math_div_round(current_voltage - eeprom_voltage,
 884                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
 885
 886         if (current_voltage > eeprom_voltage)
 887                 comp *= 2;
 888         if ((comp < -2) || (comp > 2))
 889                 comp = 0;
 890
 891         return comp;
 892 }
 893
 894 static s32 iwl4965_get_tx_atten_grp(u16 channel)
 895 {
 896         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
 897             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
 898                 return CALIB_CH_GROUP_5;
 899
 900         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
 901             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
 902                 return CALIB_CH_GROUP_1;
 903
 904         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
 905             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
 906                 return CALIB_CH_GROUP_2;
 907
 908         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
 909             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
 910                 return CALIB_CH_GROUP_3;
 911
 912         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
 913             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
 914                 return CALIB_CH_GROUP_4;
 915
 916         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
 917         return -1;
 918 }
 919
 920 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
 921 {
 922         s32 b = -1;
 923
 924         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
 925                 if (priv->calib_info->band_info[b].ch_from == 0)
 926                         continue;
 927
 928                 if ((channel >= priv->calib_info->band_info[b].ch_from)
 929                     && (channel <= priv->calib_info->band_info[b].ch_to))
 930                         break;
 931         }
 932
 933         return b;
 934 }
 935
 936 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
 937 {
 938         s32 val;
 939
 940         if (x2 == x1)
 941                 return y1;
 942         else {
 943                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
 944                 return val + y2;
 945         }
 946 }
 947
 948 /**
 949  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
 950  *
 951  * Interpolates factory measurements from the two sample channels within a
 952  * sub-band, to apply to channel of interest.  Interpolation is proportional to
 953  * differences in channel frequencies, which is proportional to differences
 954  * in channel number.
 955  */
 956 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
 957                                     struct iwl_eeprom_calib_ch_info *chan_info)
 958 {
 959         s32 s = -1;
 960         u32 c;
 961         u32 m;
 962         const struct iwl_eeprom_calib_measure *m1;
 963         const struct iwl_eeprom_calib_measure *m2;
 964         struct iwl_eeprom_calib_measure *omeas;
 965         u32 ch_i1;
 966         u32 ch_i2;
 967
 968         s = iwl4965_get_sub_band(priv, channel);
 969         if (s >= EEPROM_TX_POWER_BANDS) {
 970                 IWL_ERROR("Tx Power can not find channel %d\n", channel);
 971                 return -1;
 972         }
 973
 974         ch_i1 = priv->calib_info->band_info[s].ch1.ch_num;
 975         ch_i2 = priv->calib_info->band_info[s].ch2.ch_num;
 976         chan_info->ch_num = (u8) channel;
 977
 978         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
 979                           channel, s, ch_i1, ch_i2);
 980
 981         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
 982                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
 983                         m1 = &(priv->calib_info->band_info[s].ch1.
 984                                measurements[c][m]);
 985                         m2 = &(priv->calib_info->band_info[s].ch2.
 986                                measurements[c][m]);
 987                         omeas = &(chan_info->measurements[c][m]);
 988
 989                         omeas->actual_pow =
 990                             (u8) iwl4965_interpolate_value(channel, ch_i1,
 991                                                            m1->actual_pow,
 992                                                            ch_i2,
 993                                                            m2->actual_pow);
 994                         omeas->gain_idx =
 995                             (u8) iwl4965_interpolate_value(channel, ch_i1,
 996                                                            m1->gain_idx, ch_i2,
 997                                                            m2->gain_idx);
 998                         omeas->temperature =
 999                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1000                                                            m1->temperature,
1001                                                            ch_i2,
1002                                                            m2->temperature);
1003                         omeas->pa_det =
1004                             (s8) iwl4965_interpolate_value(channel, ch_i1,
1005                                                            m1->pa_det, ch_i2,
1006                                                            m2->pa_det);
1007
1008                         IWL_DEBUG_TXPOWER
1009                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
1010                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
1011                         IWL_DEBUG_TXPOWER
1012                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
1013                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
1014                         IWL_DEBUG_TXPOWER
1015                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
1016                              m1->pa_det, m2->pa_det, omeas->pa_det);
1017                         IWL_DEBUG_TXPOWER
1018                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
1019                              m1->temperature, m2->temperature,
1020                              omeas->temperature);
1021                 }
1022         }
1023
1024         return 0;
1025 }
1026
1027 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
1028  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
1029 static s32 back_off_table[] = {
1030         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
1031         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
1032         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
1033         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
1034         10                      /* CCK */
1035 };
1036
1037 /* Thermal compensation values for txpower for various frequency ranges ...
1038  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
1039 static struct iwl4965_txpower_comp_entry {
1040         s32 degrees_per_05db_a;
1041         s32 degrees_per_05db_a_denom;
1042 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
1043         {9, 2},                 /* group 0 5.2, ch  34-43 */
1044         {4, 1},                 /* group 1 5.2, ch  44-70 */
1045         {4, 1},                 /* group 2 5.2, ch  71-124 */
1046         {4, 1},                 /* group 3 5.2, ch 125-200 */
1047         {3, 1}                  /* group 4 2.4, ch   all */
1048 };
1049
1050 static s32 get_min_power_index(s32 rate_power_index, u32 band)
1051 {
1052         if (!band) {
1053                 if ((rate_power_index & 7) <= 4)
1054                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
1055         }
1056         return MIN_TX_GAIN_INDEX;
1057 }
1058
1059 struct gain_entry {
1060         u8 dsp;
1061         u8 radio;
1062 };
1063
1064 static const struct gain_entry gain_table[2][108] = {
1065         /* 5.2GHz power gain index table */
1066         {
1067          {123, 0x3F},           /* highest txpower */
1068          {117, 0x3F},
1069          {110, 0x3F},
1070          {104, 0x3F},
1071          {98, 0x3F},
1072          {110, 0x3E},
1073          {104, 0x3E},
1074          {98, 0x3E},
1075          {110, 0x3D},
1076          {104, 0x3D},
1077          {98, 0x3D},
1078          {110, 0x3C},
1079          {104, 0x3C},
1080          {98, 0x3C},
1081          {110, 0x3B},
1082          {104, 0x3B},
1083          {98, 0x3B},
1084          {110, 0x3A},
1085          {104, 0x3A},
1086          {98, 0x3A},
1087          {110, 0x39},
1088          {104, 0x39},
1089          {98, 0x39},
1090          {110, 0x38},
1091          {104, 0x38},
1092          {98, 0x38},
1093          {110, 0x37},
1094          {104, 0x37},
1095          {98, 0x37},
1096          {110, 0x36},
1097          {104, 0x36},
1098          {98, 0x36},
1099          {110, 0x35},
1100          {104, 0x35},
1101          {98, 0x35},
1102          {110, 0x34},
1103          {104, 0x34},
1104          {98, 0x34},
1105          {110, 0x33},
1106          {104, 0x33},
1107          {98, 0x33},
1108          {110, 0x32},
1109          {104, 0x32},
1110          {98, 0x32},
1111          {110, 0x31},
1112          {104, 0x31},
1113          {98, 0x31},
1114          {110, 0x30},
1115          {104, 0x30},
1116          {98, 0x30},
1117          {110, 0x25},
1118          {104, 0x25},
1119          {98, 0x25},
1120          {110, 0x24},
1121          {104, 0x24},
1122          {98, 0x24},
1123          {110, 0x23},
1124          {104, 0x23},
1125          {98, 0x23},
1126          {110, 0x22},
1127          {104, 0x18},
1128          {98, 0x18},
1129          {110, 0x17},
1130          {104, 0x17},
1131          {98, 0x17},
1132          {110, 0x16},
1133          {104, 0x16},
1134          {98, 0x16},
1135          {110, 0x15},
1136          {104, 0x15},
1137          {98, 0x15},
1138          {110, 0x14},
1139          {104, 0x14},
1140          {98, 0x14},
1141          {110, 0x13},
1142          {104, 0x13},
1143          {98, 0x13},
1144          {110, 0x12},
1145          {104, 0x08},
1146          {98, 0x08},
1147          {110, 0x07},
1148          {104, 0x07},
1149          {98, 0x07},
1150          {110, 0x06},
1151          {104, 0x06},
1152          {98, 0x06},
1153          {110, 0x05},
1154          {104, 0x05},
1155          {98, 0x05},
1156          {110, 0x04},
1157          {104, 0x04},
1158          {98, 0x04},
1159          {110, 0x03},
1160          {104, 0x03},
1161          {98, 0x03},
1162          {110, 0x02},
1163          {104, 0x02},
1164          {98, 0x02},
1165          {110, 0x01},
1166          {104, 0x01},
1167          {98, 0x01},
1168          {110, 0x00},
1169          {104, 0x00},
1170          {98, 0x00},
1171          {93, 0x00},
1172          {88, 0x00},
1173          {83, 0x00},
1174          {78, 0x00},
1175          },
1176         /* 2.4GHz power gain index table */
1177         {
1178          {110, 0x3f},           /* highest txpower */
1179          {104, 0x3f},
1180          {98, 0x3f},
1181          {110, 0x3e},
1182          {104, 0x3e},
1183          {98, 0x3e},
1184          {110, 0x3d},
1185          {104, 0x3d},
1186          {98, 0x3d},
1187          {110, 0x3c},
1188          {104, 0x3c},
1189          {98, 0x3c},
1190          {110, 0x3b},
1191          {104, 0x3b},
1192          {98, 0x3b},
1193          {110, 0x3a},
1194          {104, 0x3a},
1195          {98, 0x3a},
1196          {110, 0x39},
1197          {104, 0x39},
1198          {98, 0x39},
1199          {110, 0x38},
1200          {104, 0x38},
1201          {98, 0x38},
1202          {110, 0x37},
1203          {104, 0x37},
1204          {98, 0x37},
1205          {110, 0x36},
1206          {104, 0x36},
1207          {98, 0x36},
1208          {110, 0x35},
1209          {104, 0x35},
1210          {98, 0x35},
1211          {110, 0x34},
1212          {104, 0x34},
1213          {98, 0x34},
1214          {110, 0x33},
1215          {104, 0x33},
1216          {98, 0x33},
1217          {110, 0x32},
1218          {104, 0x32},
1219          {98, 0x32},
1220          {110, 0x31},
1221          {104, 0x31},
1222          {98, 0x31},
1223          {110, 0x30},
1224          {104, 0x30},
1225          {98, 0x30},
1226          {110, 0x6},
1227          {104, 0x6},
1228          {98, 0x6},
1229          {110, 0x5},
1230          {104, 0x5},
1231          {98, 0x5},
1232          {110, 0x4},
1233          {104, 0x4},
1234          {98, 0x4},
1235          {110, 0x3},
1236          {104, 0x3},
1237          {98, 0x3},
1238          {110, 0x2},
1239          {104, 0x2},
1240          {98, 0x2},
1241          {110, 0x1},
1242          {104, 0x1},
1243          {98, 0x1},
1244          {110, 0x0},
1245          {104, 0x0},
1246          {98, 0x0},
1247          {97, 0},
1248          {96, 0},
1249          {95, 0},
1250          {94, 0},
1251          {93, 0},
1252          {92, 0},
1253          {91, 0},
1254          {90, 0},
1255          {89, 0},
1256          {88, 0},
1257          {87, 0},
1258          {86, 0},
1259          {85, 0},
1260          {84, 0},
1261          {83, 0},
1262          {82, 0},
1263          {81, 0},
1264          {80, 0},
1265          {79, 0},
1266          {78, 0},
1267          {77, 0},
1268          {76, 0},
1269          {75, 0},
1270          {74, 0},
1271          {73, 0},
1272          {72, 0},
1273          {71, 0},
1274          {70, 0},
1275          {69, 0},
1276          {68, 0},
1277          {67, 0},
1278          {66, 0},
1279          {65, 0},
1280          {64, 0},
1281          {63, 0},
1282          {62, 0},
1283          {61, 0},
1284          {60, 0},
1285          {59, 0},
1286          }
1287 };
1288
1289 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
1290                                     u8 is_fat, u8 ctrl_chan_high,
1291                                     struct iwl4965_tx_power_db *tx_power_tbl)
1292 {
1293         u8 saturation_power;
1294         s32 target_power;
1295         s32 user_target_power;
1296         s32 power_limit;
1297         s32 current_temp;
1298         s32 reg_limit;
1299         s32 current_regulatory;
1300         s32 txatten_grp = CALIB_CH_GROUP_MAX;
1301         int i;
1302         int c;
1303         const struct iwl_channel_info *ch_info = NULL;
1304         struct iwl_eeprom_calib_ch_info ch_eeprom_info;
1305         const struct iwl_eeprom_calib_measure *measurement;
1306         s16 voltage;
1307         s32 init_voltage;
1308         s32 voltage_compensation;
1309         s32 degrees_per_05db_num;
1310         s32 degrees_per_05db_denom;
1311         s32 factory_temp;
1312         s32 temperature_comp[2];
1313         s32 factory_gain_index[2];
1314         s32 factory_actual_pwr[2];
1315         s32 power_index;
1316
1317         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
1318          *   are used for indexing into txpower table) */
1319         user_target_power = 2 * priv->tx_power_user_lmt;
1320
1321         /* Get current (RXON) channel, band, width */
1322         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
1323                           is_fat);
1324
1325         ch_info = iwl_get_channel_info(priv, priv->band, channel);
1326
1327         if (!is_channel_valid(ch_info))
1328                 return -EINVAL;
1329
1330         /* get txatten group, used to select 1) thermal txpower adjustment
1331          *   and 2) mimo txpower balance between Tx chains. */
1332         txatten_grp = iwl4965_get_tx_atten_grp(channel);
1333         if (txatten_grp < 0)
1334                 return -EINVAL;
1335
1336         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
1337                           channel, txatten_grp);
1338
1339         if (is_fat) {
1340                 if (ctrl_chan_high)
1341                         channel -= 2;
1342                 else
1343                         channel += 2;
1344         }
1345
1346         /* hardware txpower limits ...
1347          * saturation (clipping distortion) txpowers are in half-dBm */
1348         if (band)
1349                 saturation_power = priv->calib_info->saturation_power24;
1350         else
1351                 saturation_power = priv->calib_info->saturation_power52;
1352
1353         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
1354             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
1355                 if (band)
1356                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
1357                 else
1358                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
1359         }
1360
1361         /* regulatory txpower limits ... reg_limit values are in half-dBm,
1362          *   max_power_avg values are in dBm, convert * 2 */
1363         if (is_fat)
1364                 reg_limit = ch_info->fat_max_power_avg * 2;
1365         else
1366                 reg_limit = ch_info->max_power_avg * 2;
1367
1368         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
1369             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
1370                 if (band)
1371                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
1372                 else
1373                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
1374         }
1375
1376         /* Interpolate txpower calibration values for this channel,
1377          *   based on factory calibration tests on spaced channels. */
1378         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
1379
1380         /* calculate tx gain adjustment based on power supply voltage */
1381         voltage = priv->calib_info->voltage;
1382         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
1383         voltage_compensation =
1384             iwl4965_get_voltage_compensation(voltage, init_voltage);
1385
1386         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
1387                           init_voltage,
1388                           voltage, voltage_compensation);
1389
1390         /* get current temperature (Celsius) */
1391         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
1392         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
1393         current_temp = KELVIN_TO_CELSIUS(current_temp);
1394
1395         /* select thermal txpower adjustment params, based on channel group
1396          *   (same frequency group used for mimo txatten adjustment) */
1397         degrees_per_05db_num =
1398             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
1399         degrees_per_05db_denom =
1400             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
1401
1402         /* get per-chain txpower values from factory measurements */
1403         for (c = 0; c < 2; c++) {
1404                 measurement = &ch_eeprom_info.measurements[c][1];
1405
1406                 /* txgain adjustment (in half-dB steps) based on difference
1407                  *   between factory and current temperature */
1408                 factory_temp = measurement->temperature;
1409                 iwl4965_math_div_round((current_temp - factory_temp) *
1410                                        degrees_per_05db_denom,
1411                                        degrees_per_05db_num,
1412                                        &temperature_comp[c]);
1413
1414                 factory_gain_index[c] = measurement->gain_idx;
1415                 factory_actual_pwr[c] = measurement->actual_pow;
1416
1417                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
1418                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
1419                                   "curr tmp %d, comp %d steps\n",
1420                                   factory_temp, current_temp,
1421                                   temperature_comp[c]);
1422
1423                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
1424                                   factory_gain_index[c],
1425                                   factory_actual_pwr[c]);
1426         }
1427
1428         /* for each of 33 bit-rates (including 1 for CCK) */
1429         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
1430                 u8 is_mimo_rate;
1431                 union iwl4965_tx_power_dual_stream tx_power;
1432
1433                 /* for mimo, reduce each chain's txpower by half
1434                  * (3dB, 6 steps), so total output power is regulatory
1435                  * compliant. */
1436                 if (i & 0x8) {
1437                         current_regulatory = reg_limit -
1438                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
1439                         is_mimo_rate = 1;
1440                 } else {
1441                         current_regulatory = reg_limit;
1442                         is_mimo_rate = 0;
1443                 }
1444
1445                 /* find txpower limit, either hardware or regulatory */
1446                 power_limit = saturation_power - back_off_table[i];
1447                 if (power_limit > current_regulatory)
1448                         power_limit = current_regulatory;
1449
1450                 /* reduce user's txpower request if necessary
1451                  * for this rate on this channel */
1452                 target_power = user_target_power;
1453                 if (target_power > power_limit)
1454                         target_power = power_limit;
1455
1456                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
1457                                   i, saturation_power - back_off_table[i],
1458                                   current_regulatory, user_target_power,
1459                                   target_power);
1460
1461                 /* for each of 2 Tx chains (radio transmitters) */
1462                 for (c = 0; c < 2; c++) {
1463                         s32 atten_value;
1464
1465                         if (is_mimo_rate)
1466                                 atten_value =
1467                                     (s32)le32_to_cpu(priv->card_alive_init.
1468                                     tx_atten[txatten_grp][c]);
1469                         else
1470                                 atten_value = 0;
1471
1472                         /* calculate index; higher index means lower txpower */
1473                         power_index = (u8) (factory_gain_index[c] -
1474                                             (target_power -
1475                                              factory_actual_pwr[c]) -
1476                                             temperature_comp[c] -
1477                                             voltage_compensation +
1478                                             atten_value);
1479
1480 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
1481                                                 power_index); */
1482
1483                         if (power_index < get_min_power_index(i, band))
1484                                 power_index = get_min_power_index(i, band);
1485
1486                         /* adjust 5 GHz index to support negative indexes */
1487                         if (!band)
1488                                 power_index += 9;
1489
1490                         /* CCK, rate 32, reduce txpower for CCK */
1491                         if (i == POWER_TABLE_CCK_ENTRY)
1492                                 power_index +=
1493                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
1494
1495                         /* stay within the table! */
1496                         if (power_index > 107) {
1497                                 IWL_WARNING("txpower index %d > 107\n",
1498                                             power_index);
1499                                 power_index = 107;
1500                         }
1501                         if (power_index < 0) {
1502                                 IWL_WARNING("txpower index %d < 0\n",
1503                                             power_index);
1504                                 power_index = 0;
1505                         }
1506
1507                         /* fill txpower command for this rate/chain */
1508                         tx_power.s.radio_tx_gain[c] =
1509                                 gain_table[band][power_index].radio;
1510                         tx_power.s.dsp_predis_atten[c] =
1511                                 gain_table[band][power_index].dsp;
1512
1513                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
1514                                           "gain 0x%02x dsp %d\n",
1515                                           c, atten_value, power_index,
1516                                         tx_power.s.radio_tx_gain[c],
1517                                         tx_power.s.dsp_predis_atten[c]);
1518                 } /* for each chain */
1519
1520                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
1521
1522         } /* for each rate */
1523
1524         return 0;
1525 }
1526
1527 /**
1528  * iwl4965_send_tx_power - Configure the TXPOWER level user limit
1529  *
1530  * Uses the active RXON for channel, band, and characteristics (fat, high)
1531  * The power limit is taken from priv->tx_power_user_lmt.
1532  */
1533 static int iwl4965_send_tx_power(struct iwl_priv *priv)
1534 {
1535         struct iwl4965_txpowertable_cmd cmd = { 0 };
1536         int ret;
1537         u8 band = 0;
1538         u8 is_fat = 0;
1539         u8 ctrl_chan_high = 0;
1540
1541         if (test_bit(STATUS_SCANNING, &priv->status)) {
1542                 /* If this gets hit a lot, switch it to a BUG() and catch
1543                  * the stack trace to find out who is calling this during
1544                  * a scan. */
1545                 IWL_WARNING("TX Power requested while scanning!\n");
1546                 return -EAGAIN;
1547         }
1548
1549         band = priv->band == IEEE80211_BAND_2GHZ;
1550
1551         is_fat =  is_fat_channel(priv->active_rxon.flags);
1552
1553         if (is_fat &&
1554             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1555                 ctrl_chan_high = 1;
1556
1557         cmd.band = band;
1558         cmd.channel = priv->active_rxon.channel;
1559
1560         ret = iwl4965_fill_txpower_tbl(priv, band,
1561                                 le16_to_cpu(priv->active_rxon.channel),
1562                                 is_fat, ctrl_chan_high, &cmd.tx_power);
1563         if (ret)
1564                 goto out;
1565
1566         ret = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
1567
1568 out:
1569         return ret;
1570 }
1571
1572 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
1573 {
1574         int ret = 0;
1575         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1576         const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1577         const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1578
1579         if ((rxon1->flags == rxon2->flags) &&
1580             (rxon1->filter_flags == rxon2->filter_flags) &&
1581             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1582             (rxon1->ofdm_ht_single_stream_basic_rates ==
1583              rxon2->ofdm_ht_single_stream_basic_rates) &&
1584             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1585              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1586             (rxon1->rx_chain == rxon2->rx_chain) &&
1587             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1588                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1589                 return 0;
1590         }
1591
1592         rxon_assoc.flags = priv->staging_rxon.flags;
1593         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1594         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1595         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1596         rxon_assoc.reserved = 0;
1597         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1598             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1599         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1600             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1601         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1602
1603         ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
1604                                      sizeof(rxon_assoc), &rxon_assoc, NULL);
1605         if (ret)
1606                 return ret;
1607
1608         return ret;
1609 }
1610
1611
1612 int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
1613 {
1614         int rc;
1615         u8 band = 0;
1616         u8 is_fat = 0;
1617         u8 ctrl_chan_high = 0;
1618         struct iwl4965_channel_switch_cmd cmd = { 0 };
1619         const struct iwl_channel_info *ch_info;
1620
1621         band = priv->band == IEEE80211_BAND_2GHZ;
1622
1623         ch_info = iwl_get_channel_info(priv, priv->band, channel);
1624
1625         is_fat = is_fat_channel(priv->staging_rxon.flags);
1626
1627         if (is_fat &&
1628             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1629                 ctrl_chan_high = 1;
1630
1631         cmd.band = band;
1632         cmd.expect_beacon = 0;
1633         cmd.channel = cpu_to_le16(channel);
1634         cmd.rxon_flags = priv->active_rxon.flags;
1635         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
1636         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
1637         if (ch_info)
1638                 cmd.expect_beacon = is_channel_radar(ch_info);
1639         else
1640                 cmd.expect_beacon = 1;
1641
1642         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
1643                                       ctrl_chan_high, &cmd.tx_power);
1644         if (rc) {
1645                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
1646                 return rc;
1647         }
1648
1649         rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
1650         return rc;
1651 }
1652
1653 static int iwl4965_shared_mem_rx_idx(struct iwl_priv *priv)
1654 {
1655         struct iwl4965_shared *s = priv->shared_virt;
1656         return le32_to_cpu(s->rb_closed) & 0xFFF;
1657 }
1658
1659 static int iwl4965_alloc_shared_mem(struct iwl_priv *priv)
1660 {
1661         priv->shared_virt = pci_alloc_consistent(priv->pci_dev,
1662                                         sizeof(struct iwl4965_shared),
1663                                         &priv->shared_phys);
1664         if (!priv->shared_virt)
1665                 return -ENOMEM;
1666
1667         memset(priv->shared_virt, 0, sizeof(struct iwl4965_shared));
1668
1669         priv->rb_closed_offset = offsetof(struct iwl4965_shared, rb_closed);
1670
1671         return 0;
1672 }
1673
1674 static void iwl4965_free_shared_mem(struct iwl_priv *priv)
1675 {
1676         if (priv->shared_virt)
1677                 pci_free_consistent(priv->pci_dev,
1678                                     sizeof(struct iwl4965_shared),
1679                                     priv->shared_virt,
1680                                     priv->shared_phys);
1681 }
1682
1683 /**
1684  * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
1685  */
1686 static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
1687                                             struct iwl_tx_queue *txq,
1688                                             u16 byte_cnt)
1689 {
1690         int len;
1691         int txq_id = txq->q.id;
1692         struct iwl4965_shared *shared_data = priv->shared_virt;
1693
1694         len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
1695
1696         /* Set up byte count within first 256 entries */
1697         IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
1698                        tfd_offset[txq->q.write_ptr], byte_cnt, len);
1699
1700         /* If within first 64 entries, duplicate at end */
1701         if (txq->q.write_ptr < IWL49_MAX_WIN_SIZE)
1702                 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
1703                         tfd_offset[IWL49_QUEUE_SIZE + txq->q.write_ptr],
1704                         byte_cnt, len);
1705 }
1706
1707 /**
1708  * sign_extend - Sign extend a value using specified bit as sign-bit
1709  *
1710  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
1711  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
1712  *
1713  * @param oper value to sign extend
1714  * @param index 0 based bit index (0<=index<32) to sign bit
1715  */
1716 static s32 sign_extend(u32 oper, int index)
1717 {
1718         u8 shift = 31 - index;
1719
1720         return (s32)(oper << shift) >> shift;
1721 }
1722
1723 /**
1724  * iwl4965_hw_get_temperature - return the calibrated temperature (in Kelvin)
1725  * @statistics: Provides the temperature reading from the uCode
1726  *
1727  * A return of <0 indicates bogus data in the statistics
1728  */
1729 static int iwl4965_hw_get_temperature(const struct iwl_priv *priv)
1730 {
1731         s32 temperature;
1732         s32 vt;
1733         s32 R1, R2, R3;
1734         u32 R4;
1735
1736         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
1737                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
1738                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
1739                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
1740                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
1741                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
1742                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
1743         } else {
1744                 IWL_DEBUG_TEMP("Running temperature calibration\n");
1745                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
1746                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
1747                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
1748                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
1749         }
1750
1751         /*
1752          * Temperature is only 23 bits, so sign extend out to 32.
1753          *
1754          * NOTE If we haven't received a statistics notification yet
1755          * with an updated temperature, use R4 provided to us in the
1756          * "initialize" ALIVE response.
1757          */
1758         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
1759                 vt = sign_extend(R4, 23);
1760         else
1761                 vt = sign_extend(
1762                         le32_to_cpu(priv->statistics.general.temperature), 23);
1763
1764         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n", R1, R2, R3, vt);
1765
1766         if (R3 == R1) {
1767                 IWL_ERROR("Calibration conflict R1 == R3\n");
1768                 return -1;
1769         }
1770
1771         /* Calculate temperature in degrees Kelvin, adjust by 97%.
1772          * Add offset to center the adjustment around 0 degrees Centigrade. */
1773         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
1774         temperature /= (R3 - R1);
1775         temperature = (temperature * 97) / 100 + TEMPERATURE_CALIB_KELVIN_OFFSET;
1776
1777         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n",
1778                         temperature, KELVIN_TO_CELSIUS(temperature));
1779
1780         return temperature;
1781 }
1782
1783 /* Adjust Txpower only if temperature variance is greater than threshold. */
1784 #define IWL_TEMPERATURE_THRESHOLD   3
1785
1786 /**
1787  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
1788  *
1789  * If the temperature changed has changed sufficiently, then a recalibration
1790  * is needed.
1791  *
1792  * Assumes caller will replace priv->last_temperature once calibration
1793  * executed.
1794  */
1795 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
1796 {
1797         int temp_diff;
1798
1799         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
1800                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
1801                 return 0;
1802         }
1803
1804         temp_diff = priv->temperature - priv->last_temperature;
1805
1806         /* get absolute value */
1807         if (temp_diff < 0) {
1808                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
1809                 temp_diff = -temp_diff;
1810         } else if (temp_diff == 0)
1811                 IWL_DEBUG_POWER("Same temp, \n");
1812         else
1813                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
1814
1815         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
1816                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
1817                 return 0;
1818         }
1819
1820         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
1821
1822         return 1;
1823 }
1824
1825 static void iwl4965_temperature_calib(struct iwl_priv *priv)
1826 {
1827         s32 temp;
1828
1829         temp = iwl4965_hw_get_temperature(priv);
1830         if (temp < 0)
1831                 return;
1832
1833         if (priv->temperature != temp) {
1834                 if (priv->temperature)
1835                         IWL_DEBUG_TEMP("Temperature changed "
1836                                        "from %dC to %dC\n",
1837                                        KELVIN_TO_CELSIUS(priv->temperature),
1838                                        KELVIN_TO_CELSIUS(temp));
1839                 else
1840                         IWL_DEBUG_TEMP("Temperature "
1841                                        "initialized to %dC\n",
1842                                        KELVIN_TO_CELSIUS(temp));
1843         }
1844
1845         priv->temperature = temp;
1846         set_bit(STATUS_TEMPERATURE, &priv->status);
1847
1848         if (!priv->disable_tx_power_cal &&
1849              unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
1850              iwl4965_is_temp_calib_needed(priv))
1851                 queue_work(priv->workqueue, &priv->txpower_work);
1852 }
1853
1854 /**
1855  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
1856  */
1857 static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
1858                                             u16 txq_id)
1859 {
1860         /* Simply stop the queue, but don't change any configuration;
1861          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
1862         iwl_write_prph(priv,
1863                 IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
1864                 (0 << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE)|
1865                 (1 << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
1866 }
1867
1868 /**
1869  * txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE
1870  * priv->lock must be held by the caller
1871  */
1872 static int iwl4965_txq_agg_disable(struct iwl_priv *priv, u16 txq_id,
1873                                    u16 ssn_idx, u8 tx_fifo)
1874 {
1875         int ret = 0;
1876
1877         if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
1878             (IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES <= txq_id)) {
1879                 IWL_WARNING("queue number out of range: %d, must be %d to %d\n",
1880                         txq_id, IWL49_FIRST_AMPDU_QUEUE,
1881                         IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES - 1);
1882                 return -EINVAL;
1883         }
1884
1885         ret = iwl_grab_nic_access(priv);
1886         if (ret)
1887                 return ret;
1888
1889         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
1890
1891         iwl_clear_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
1892
1893         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
1894         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
1895         /* supposes that ssn_idx is valid (!= 0xFFF) */
1896         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
1897
1898         iwl_clear_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
1899         iwl_txq_ctx_deactivate(priv, txq_id);
1900         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
1901
1902         iwl_release_nic_access(priv);
1903
1904         return 0;
1905 }
1906
1907 /**
1908  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
1909  */
1910 static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
1911                                         u16 txq_id)
1912 {
1913         u32 tbl_dw_addr;
1914         u32 tbl_dw;
1915         u16 scd_q2ratid;
1916
1917         scd_q2ratid = ra_tid & IWL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
1918
1919         tbl_dw_addr = priv->scd_base_addr +
1920                         IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
1921
1922         tbl_dw = iwl_read_targ_mem(priv, tbl_dw_addr);
1923
1924         if (txq_id & 0x1)
1925                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
1926         else
1927                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
1928
1929         iwl_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
1930
1931         return 0;
1932 }
1933
1934
1935 /**
1936  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
1937  *
1938  * NOTE:  txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE,
1939  *        i.e. it must be one of the higher queues used for aggregation
1940  */
1941 static int iwl4965_txq_agg_enable(struct iwl_priv *priv, int txq_id,
1942                                   int tx_fifo, int sta_id, int tid, u16 ssn_idx)
1943 {
1944         unsigned long flags;
1945         int ret;
1946         u16 ra_tid;
1947
1948         if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
1949             (IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES <= txq_id)) {
1950                 IWL_WARNING("queue number out of range: %d, must be %d to %d\n",
1951                         txq_id, IWL49_FIRST_AMPDU_QUEUE,
1952                         IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES - 1);
1953                 return -EINVAL;
1954         }
1955
1956         ra_tid = BUILD_RAxTID(sta_id, tid);
1957
1958         /* Modify device's station table to Tx this TID */
1959         iwl_sta_modify_enable_tid_tx(priv, sta_id, tid);
1960
1961         spin_lock_irqsave(&priv->lock, flags);
1962         ret = iwl_grab_nic_access(priv);
1963         if (ret) {
1964                 spin_unlock_irqrestore(&priv->lock, flags);
1965                 return ret;
1966         }
1967
1968         /* Stop this Tx queue before configuring it */
1969         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
1970
1971         /* Map receiver-address / traffic-ID to this queue */
1972         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
1973
1974         /* Set this queue as a chain-building queue */
1975         iwl_set_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
1976
1977         /* Place first TFD at index corresponding to start sequence number.
1978          * Assumes that ssn_idx is valid (!= 0xFFF) */
1979         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
1980         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
1981         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
1982
1983         /* Set up Tx window size and frame limit for this queue */
1984         iwl_write_targ_mem(priv,
1985                 priv->scd_base_addr + IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
1986                 (SCD_WIN_SIZE << IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1987                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1988
1989         iwl_write_targ_mem(priv, priv->scd_base_addr +
1990                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
1991                 (SCD_FRAME_LIMIT << IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
1992                 & IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1993
1994         iwl_set_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
1995
1996         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
1997         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
1998
1999         iwl_release_nic_access(priv);
2000         spin_unlock_irqrestore(&priv->lock, flags);
2001
2002         return 0;
2003 }
2004
2005
2006 static u16 iwl4965_get_hcmd_size(u8 cmd_id, u16 len)
2007 {
2008         switch (cmd_id) {
2009         case REPLY_RXON:
2010                 return (u16) sizeof(struct iwl4965_rxon_cmd);
2011         default:
2012                 return len;
2013         }
2014 }
2015
2016 static u16 iwl4965_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
2017 {
2018         struct iwl4965_addsta_cmd *addsta = (struct iwl4965_addsta_cmd *)data;
2019         addsta->mode = cmd->mode;
2020         memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
2021         memcpy(&addsta->key, &cmd->key, sizeof(struct iwl4965_keyinfo));
2022         addsta->station_flags = cmd->station_flags;
2023         addsta->station_flags_msk = cmd->station_flags_msk;
2024         addsta->tid_disable_tx = cmd->tid_disable_tx;
2025         addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
2026         addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
2027         addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
2028         addsta->reserved1 = __constant_cpu_to_le16(0);
2029         addsta->reserved2 = __constant_cpu_to_le32(0);
2030
2031         return (u16)sizeof(struct iwl4965_addsta_cmd);
2032 }
2033
2034 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2035 {
2036         return le32_to_cpup(&tx_resp->u.status + tx_resp->frame_count) & MAX_SN;
2037 }
2038
2039 /**
2040  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2041  */
2042 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2043                                       struct iwl_ht_agg *agg,
2044                                       struct iwl4965_tx_resp *tx_resp,
2045                                       int txq_id, u16 start_idx)
2046 {
2047         u16 status;
2048         struct agg_tx_status *frame_status = tx_resp->u.agg_status;
2049         struct ieee80211_tx_info *info = NULL;
2050         struct ieee80211_hdr *hdr = NULL;
2051         u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2052         int i, sh, idx;
2053         u16 seq;
2054         if (agg->wait_for_ba)
2055                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2056
2057         agg->frame_count = tx_resp->frame_count;
2058         agg->start_idx = start_idx;
2059         agg->rate_n_flags = rate_n_flags;
2060         agg->bitmap = 0;
2061
2062         /* # frames attempted by Tx command */
2063         if (agg->frame_count == 1) {
2064                 /* Only one frame was attempted; no block-ack will arrive */
2065                 status = le16_to_cpu(frame_status[0].status);
2066                 idx = start_idx;
2067
2068                 /* FIXME: code repetition */
2069                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2070                                    agg->frame_count, agg->start_idx, idx);
2071
2072                 info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb[0]);
2073                 info->status.retry_count = tx_resp->failure_frame;
2074                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
2075                 info->flags |= iwl_is_tx_success(status)?
2076                         IEEE80211_TX_STAT_ACK : 0;
2077                 iwl_hwrate_to_tx_control(priv, rate_n_flags, info);
2078                 /* FIXME: code repetition end */
2079
2080                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2081                                     status & 0xff, tx_resp->failure_frame);
2082                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n", rate_n_flags);
2083
2084                 agg->wait_for_ba = 0;
2085         } else {
2086                 /* Two or more frames were attempted; expect block-ack */
2087                 u64 bitmap = 0;
2088                 int start = agg->start_idx;
2089
2090                 /* Construct bit-map of pending frames within Tx window */
2091                 for (i = 0; i < agg->frame_count; i++) {
2092                         u16 sc;
2093                         status = le16_to_cpu(frame_status[i].status);
2094                         seq  = le16_to_cpu(frame_status[i].sequence);
2095                         idx = SEQ_TO_INDEX(seq);
2096                         txq_id = SEQ_TO_QUEUE(seq);
2097
2098                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2099                                       AGG_TX_STATE_ABORT_MSK))
2100                                 continue;
2101
2102                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2103                                            agg->frame_count, txq_id, idx);
2104
2105                         hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
2106
2107                         sc = le16_to_cpu(hdr->seq_ctrl);
2108                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2109                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
2110                                           " idx=%d, seq_idx=%d, seq=%d\n",
2111                                           idx, SEQ_TO_SN(sc),
2112                                           hdr->seq_ctrl);
2113                                 return -1;
2114                         }
2115
2116                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2117                                            i, idx, SEQ_TO_SN(sc));
2118
2119                         sh = idx - start;
2120                         if (sh > 64) {
2121                                 sh = (start - idx) + 0xff;
2122                                 bitmap = bitmap << sh;
2123                                 sh = 0;
2124                                 start = idx;
2125                         } else if (sh < -64)
2126                                 sh  = 0xff - (start - idx);
2127                         else if (sh < 0) {
2128                                 sh = start - idx;
2129                                 start = idx;
2130                                 bitmap = bitmap << sh;
2131                                 sh = 0;
2132                         }
2133                         bitmap |= 1ULL << sh;
2134                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%llx\n",
2135                                            start, (unsigned long long)bitmap);
2136                 }
2137
2138                 agg->bitmap = bitmap;
2139                 agg->start_idx = start;
2140                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2141                                    agg->frame_count, agg->start_idx,
2142                                    (unsigned long long)agg->bitmap);
2143
2144                 if (bitmap)
2145                         agg->wait_for_ba = 1;
2146         }
2147         return 0;
2148 }
2149
2150 /**
2151  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2152  */
2153 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2154                                 struct iwl_rx_mem_buffer *rxb)
2155 {
2156         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2157         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2158         int txq_id = SEQ_TO_QUEUE(sequence);
2159         int index = SEQ_TO_INDEX(sequence);
2160         struct iwl_tx_queue *txq = &priv->txq[txq_id];
2161         struct ieee80211_tx_info *info;
2162         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2163         u32  status = le32_to_cpu(tx_resp->u.status);
2164         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
2165         __le16 fc;
2166         struct ieee80211_hdr *hdr;
2167         u8 *qc = NULL;
2168
2169         if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
2170                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2171                           "is out of range [0-%d] %d %d\n", txq_id,
2172                           index, txq->q.n_bd, txq->q.write_ptr,
2173                           txq->q.read_ptr);
2174                 return;
2175         }
2176
2177         info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]);
2178         memset(&info->status, 0, sizeof(info->status));
2179
2180         hdr = iwl_tx_queue_get_hdr(priv, txq_id, index);
2181         fc = hdr->frame_control;
2182         if (ieee80211_is_data_qos(fc)) {
2183                 qc = ieee80211_get_qos_ctl(hdr);
2184                 tid = qc[0] & 0xf;
2185         }
2186
2187         sta_id = iwl_get_ra_sta_id(priv, hdr);
2188         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2189                 IWL_ERROR("Station not known\n");
2190                 return;
2191         }
2192
2193         if (txq->sched_retry) {
2194                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2195                 struct iwl_ht_agg *agg = NULL;
2196
2197                 if (!qc)
2198                         return;
2199
2200                 agg = &priv->stations[sta_id].tid[tid].agg;
2201
2202                 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
2203
2204                 /* check if BAR is needed */
2205                 if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status))
2206                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
2207
2208                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2209                         int freed, ampdu_q;
2210                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2211                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
2212                                            "%d index %d\n", scd_ssn , index);
2213                         freed = iwl_tx_queue_reclaim(priv, txq_id, index);
2214                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2215
2216                         if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
2217                             txq_id >= 0 && priv->mac80211_registered &&
2218                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA) {
2219                                 /* calculate mac80211 ampdu sw queue to wake */
2220                                 ampdu_q = txq_id - IWL49_FIRST_AMPDU_QUEUE +
2221                                           priv->hw->queues;
2222                                 if (agg->state == IWL_AGG_OFF)
2223                                         ieee80211_wake_queue(priv->hw, txq_id);
2224                                 else
2225                                         ieee80211_wake_queue(priv->hw, ampdu_q);
2226                         }
2227                         iwl_txq_check_empty(priv, sta_id, tid, txq_id);
2228                 }
2229         } else {
2230                 info->status.retry_count = tx_resp->failure_frame;
2231                 info->flags |=
2232                         iwl_is_tx_success(status) ? IEEE80211_TX_STAT_ACK : 0;
2233                 iwl_hwrate_to_tx_control(priv,
2234                                         le32_to_cpu(tx_resp->rate_n_flags),
2235                                         info);
2236
2237                 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags "
2238                              "0x%x retries %d\n", txq_id,
2239                                 iwl_get_tx_fail_reason(status),
2240                                 status, le32_to_cpu(tx_resp->rate_n_flags),
2241                                 tx_resp->failure_frame);
2242
2243                 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
2244
2245                 if (index != -1) {
2246                     int freed = iwl_tx_queue_reclaim(priv, txq_id, index);
2247                     if (tid != MAX_TID_COUNT)
2248                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2249                     if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
2250                         (txq_id >= 0) && priv->mac80211_registered)
2251                         ieee80211_wake_queue(priv->hw, txq_id);
2252                     if (tid != MAX_TID_COUNT)
2253                         iwl_txq_check_empty(priv, sta_id, tid, txq_id);
2254                 }
2255         }
2256
2257         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
2258                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
2259 }
2260
2261 static int iwl4965_calc_rssi(struct iwl_priv *priv,
2262                              struct iwl_rx_phy_res *rx_resp)
2263 {
2264         /* data from PHY/DSP regarding signal strength, etc.,
2265          *   contents are always there, not configurable by host.  */
2266         struct iwl4965_rx_non_cfg_phy *ncphy =
2267             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
2268         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL49_AGC_DB_MASK)
2269                         >> IWL49_AGC_DB_POS;
2270
2271         u32 valid_antennae =
2272             (le16_to_cpu(rx_resp->phy_flags) & IWL49_RX_PHY_FLAGS_ANTENNAE_MASK)
2273                         >> IWL49_RX_PHY_FLAGS_ANTENNAE_OFFSET;
2274         u8 max_rssi = 0;
2275         u32 i;
2276
2277         /* Find max rssi among 3 possible receivers.
2278          * These values are measured by the digital signal processor (DSP).
2279          * They should stay fairly constant even as the signal strength varies,
2280          *   if the radio's automatic gain control (AGC) is working right.
2281          * AGC value (see below) will provide the "interesting" info. */
2282         for (i = 0; i < 3; i++)
2283                 if (valid_antennae & (1 << i))
2284                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
2285
2286         IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
2287                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
2288                 max_rssi, agc);
2289
2290         /* dBm = max_rssi dB - agc dB - constant.
2291          * Higher AGC (higher radio gain) means lower signal. */
2292         return max_rssi - agc - IWL_RSSI_OFFSET;
2293 }
2294
2295
2296 /* Set up 4965-specific Rx frame reply handlers */
2297 static void iwl4965_rx_handler_setup(struct iwl_priv *priv)
2298 {
2299         /* Legacy Rx frames */
2300         priv->rx_handlers[REPLY_RX] = iwl_rx_reply_rx;
2301         /* Tx response */
2302         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
2303 }
2304
2305 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
2306 {
2307         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
2308 }
2309
2310 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
2311 {
2312         cancel_work_sync(&priv->txpower_work);
2313 }
2314
2315
2316 static struct iwl_hcmd_ops iwl4965_hcmd = {
2317         .rxon_assoc = iwl4965_send_rxon_assoc,
2318 };
2319
2320 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
2321         .get_hcmd_size = iwl4965_get_hcmd_size,
2322         .build_addsta_hcmd = iwl4965_build_addsta_hcmd,
2323         .chain_noise_reset = iwl4965_chain_noise_reset,
2324         .gain_computation = iwl4965_gain_computation,
2325         .rts_tx_cmd_flag = iwl4965_rts_tx_cmd_flag,
2326         .calc_rssi = iwl4965_calc_rssi,
2327 };
2328
2329 static struct iwl_lib_ops iwl4965_lib = {
2330         .set_hw_params = iwl4965_hw_set_hw_params,
2331         .alloc_shared_mem = iwl4965_alloc_shared_mem,
2332         .free_shared_mem = iwl4965_free_shared_mem,
2333         .shared_mem_rx_idx = iwl4965_shared_mem_rx_idx,
2334         .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
2335         .txq_set_sched = iwl4965_txq_set_sched,
2336         .txq_agg_enable = iwl4965_txq_agg_enable,
2337         .txq_agg_disable = iwl4965_txq_agg_disable,
2338         .rx_handler_setup = iwl4965_rx_handler_setup,
2339         .setup_deferred_work = iwl4965_setup_deferred_work,
2340         .cancel_deferred_work = iwl4965_cancel_deferred_work,
2341         .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
2342         .alive_notify = iwl4965_alive_notify,
2343         .init_alive_start = iwl4965_init_alive_start,
2344         .load_ucode = iwl4965_load_bsm,
2345         .apm_ops = {
2346                 .init = iwl4965_apm_init,
2347                 .reset = iwl4965_apm_reset,
2348                 .stop = iwl4965_apm_stop,
2349                 .config = iwl4965_nic_config,
2350                 .set_pwr_src = iwl4965_set_pwr_src,
2351         },
2352         .eeprom_ops = {
2353                 .regulatory_bands = {
2354                         EEPROM_REGULATORY_BAND_1_CHANNELS,
2355                         EEPROM_REGULATORY_BAND_2_CHANNELS,
2356                         EEPROM_REGULATORY_BAND_3_CHANNELS,
2357                         EEPROM_REGULATORY_BAND_4_CHANNELS,
2358                         EEPROM_REGULATORY_BAND_5_CHANNELS,
2359                         EEPROM_4965_REGULATORY_BAND_24_FAT_CHANNELS,
2360                         EEPROM_4965_REGULATORY_BAND_52_FAT_CHANNELS
2361                 },
2362                 .verify_signature  = iwlcore_eeprom_verify_signature,
2363                 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
2364                 .release_semaphore = iwlcore_eeprom_release_semaphore,
2365                 .check_version = iwl4965_eeprom_check_version,
2366                 .query_addr = iwlcore_eeprom_query_addr,
2367         },
2368         .send_tx_power  = iwl4965_send_tx_power,
2369         .update_chain_flags = iwl4965_update_chain_flags,
2370         .temperature = iwl4965_temperature_calib,
2371 };
2372
2373 static struct iwl_ops iwl4965_ops = {
2374         .lib = &iwl4965_lib,
2375         .hcmd = &iwl4965_hcmd,
2376         .utils = &iwl4965_hcmd_utils,
2377 };
2378
2379 struct iwl_cfg iwl4965_agn_cfg = {
2380         .name = "4965AGN",
2381         .fw_name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode",
2382         .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
2383         .eeprom_size = IWL4965_EEPROM_IMG_SIZE,
2384         .ops = &iwl4965_ops,
2385         .mod_params = &iwl4965_mod_params,
2386 };
2387
2388 /* Module firmware */
2389 MODULE_FIRMWARE("iwlwifi-4965" IWL4965_UCODE_API ".ucode");
2390
2391 module_param_named(antenna, iwl4965_mod_params.antenna, int, 0444);
2392 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
2393 module_param_named(disable, iwl4965_mod_params.disable, int, 0444);
2394 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
2395 module_param_named(swcrypto, iwl4965_mod_params.sw_crypto, int, 0444);
2396 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
2397 module_param_named(debug, iwl4965_mod_params.debug, int, 0444);
2398 MODULE_PARM_DESC(debug, "debug output mask");
2399 module_param_named(
2400         disable_hw_scan, iwl4965_mod_params.disable_hw_scan, int, 0444);
2401 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
2402
2403 module_param_named(queues_num, iwl4965_mod_params.num_of_queues, int, 0444);
2404 MODULE_PARM_DESC(queues_num, "number of hw queues.");
2405 /* QoS */
2406 module_param_named(qos_enable, iwl4965_mod_params.enable_qos, int, 0444);
2407 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
2408 /* 11n */
2409 module_param_named(11n_disable, iwl4965_mod_params.disable_11n, int, 0444);
2410 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
2411 module_param_named(amsdu_size_8K, iwl4965_mod_params.amsdu_size_8K, int, 0444);
2412 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
2413
2414 module_param_named(fw_restart4965, iwl4965_mod_params.restart_fw, int, 0444);
2415 MODULE_PARM_DESC(fw_restart4965, "restart firmware in case of error");