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/init.h>
  30 #include <linux/pci.h>
  31 #include <linux/dma-mapping.h>
  32 #include <linux/delay.h>
  33 #include <linux/skbuff.h>
  34 #include <linux/netdevice.h>
  35 #include <linux/wireless.h>
  36 #include <net/mac80211.h>
  37 #include <linux/etherdevice.h>
  38 #include <asm/unaligned.h>
  39
  40 #include "iwl-eeprom.h"
  41 #include "iwl-dev.h"
  42 #include "iwl-core.h"
  43 #include "iwl-io.h"
  44 #include "iwl-helpers.h"
  45 #include "iwl-calib.h"
  46 #include "iwl-sta.h"
  47
  48 static int iwl4965_send_tx_power(struct iwl_priv *priv);
  49 static int iwl4965_hw_get_temperature(const struct iwl_priv *priv);
  50
  51 /* Change firmware file name, using "-" and incrementing number,
  52  *   *only* when uCode interface or architecture changes so that it
  53  *   is not compatible with earlier drivers.
  54  * This number will also appear in << 8 position of 1st dword of uCode file */
  55 #define IWL4965_UCODE_API "-2"
  56 #define IWL4965_MODULE_FIRMWARE "iwlwifi-4965" IWL4965_UCODE_API ".ucode"
  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 byte count 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 static u16 iwl4965_eeprom_calib_version(struct iwl_priv *priv)
 323 {
 324         return iwl_eeprom_query16(priv, EEPROM_4965_CALIB_VERSION_OFFSET);
 325 }
 326
 327 /*
 328  * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask
 329  * must be called under priv->lock and mac access
 330  */
 331 static void iwl4965_txq_set_sched(struct iwl_priv *priv, u32 mask)
 332 {
 333         iwl_write_prph(priv, IWL49_SCD_TXFACT, mask);
 334 }
 335
 336 static int iwl4965_apm_init(struct iwl_priv *priv)
 337 {
 338         int ret = 0;
 339
 340         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 341                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 342
 343         /* disable L0s without affecting L1 :don't wait for ICH L0s bug W/A) */
 344         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 345                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
 346
 347         /* set "initialization complete" bit to move adapter
 348          * D0U* --> D0A* state */
 349         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 350
 351         /* wait for clock stabilization */
 352         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
 353                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 354                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 355         if (ret < 0) {
 356                 IWL_DEBUG_INFO("Failed to init the card\n");
 357                 goto out;
 358         }
 359
 360         ret = iwl_grab_nic_access(priv);
 361         if (ret)
 362                 goto out;
 363
 364         /* enable DMA */
 365         iwl_write_prph(priv, APMG_CLK_CTRL_REG, APMG_CLK_VAL_DMA_CLK_RQT |
 366                                                 APMG_CLK_VAL_BSM_CLK_RQT);
 367
 368         udelay(20);
 369
 370         /* disable L1-Active */
 371         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 372                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 373
 374         iwl_release_nic_access(priv);
 375 out:
 376         return ret;
 377 }
 378
 379
 380 static void iwl4965_nic_config(struct iwl_priv *priv)
 381 {
 382         unsigned long flags;
 383         u32 val;
 384         u16 radio_cfg;
 385         u16 link;
 386
 387         spin_lock_irqsave(&priv->lock, flags);
 388
 389         if ((priv->rev_id & 0x80) == 0x80 && (priv->rev_id & 0x7f) < 8) {
 390                 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 391                 /* Enable No Snoop field */
 392                 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
 393                                        val & ~(1 << 11));
 394         }
 395
 396         pci_read_config_word(priv->pci_dev, PCI_CFG_LINK_CTRL, &link);
 397
 398         /* L1 is enabled by BIOS */
 399         if ((link & PCI_CFG_LINK_CTRL_VAL_L1_EN) == PCI_CFG_LINK_CTRL_VAL_L1_EN)
 400                 /* disable L0S disabled L1A enabled */
 401                 iwl_set_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 402         else
 403                 /* L0S enabled L1A disabled */
 404                 iwl_clear_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 405
 406         radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
 407
 408         /* write radio config values to register */
 409         if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) == EEPROM_4965_RF_CFG_TYPE_MAX)
 410                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 411                             EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
 412                             EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
 413                             EEPROM_RF_CFG_DASH_MSK(radio_cfg));
 414
 415         /* set CSR_HW_CONFIG_REG for uCode use */
 416         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 417                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 418                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
 419
 420         priv->calib_info = (struct iwl_eeprom_calib_info *)
 421                 iwl_eeprom_query_addr(priv, EEPROM_4965_CALIB_TXPOWER_OFFSET);
 422
 423         spin_unlock_irqrestore(&priv->lock, flags);
 424 }
 425
 426 static int iwl4965_apm_stop_master(struct iwl_priv *priv)
 427 {
 428         int ret = 0;
 429         unsigned long flags;
 430
 431         spin_lock_irqsave(&priv->lock, flags);
 432
 433         /* set stop master bit */
 434         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 435
 436         ret = iwl_poll_bit(priv, CSR_RESET,
 437                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
 438                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 439         if (ret < 0)
 440                 goto out;
 441
 442 out:
 443         spin_unlock_irqrestore(&priv->lock, flags);
 444         IWL_DEBUG_INFO("stop master\n");
 445
 446         return ret;
 447 }
 448
 449 static void iwl4965_apm_stop(struct iwl_priv *priv)
 450 {
 451         unsigned long flags;
 452
 453         iwl4965_apm_stop_master(priv);
 454
 455         spin_lock_irqsave(&priv->lock, flags);
 456
 457         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 458
 459         udelay(10);
 460         /* clear "init complete"  move adapter D0A* --> D0U state */
 461         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 462         spin_unlock_irqrestore(&priv->lock, flags);
 463 }
 464
 465 static int iwl4965_apm_reset(struct iwl_priv *priv)
 466 {
 467         int ret = 0;
 468         unsigned long flags;
 469
 470         iwl4965_apm_stop_master(priv);
 471
 472         spin_lock_irqsave(&priv->lock, flags);
 473
 474         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 475
 476         udelay(10);
 477
 478         /* FIXME: put here L1A -L0S w/a */
 479
 480         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 481
 482         ret = iwl_poll_bit(priv, CSR_RESET,
 483                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 484                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
 485
 486         if (ret)
 487                 goto out;
 488
 489         udelay(10);
 490
 491         ret = iwl_grab_nic_access(priv);
 492         if (ret)
 493                 goto out;
 494         /* Enable DMA and BSM Clock */
 495         iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT |
 496                                               APMG_CLK_VAL_BSM_CLK_RQT);
 497
 498         udelay(10);
 499
 500         /* disable L1A */
 501         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 502                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 503
 504         iwl_release_nic_access(priv);
 505
 506         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 507         wake_up_interruptible(&priv->wait_command_queue);
 508
 509 out:
 510         spin_unlock_irqrestore(&priv->lock, flags);
 511
 512         return ret;
 513 }
 514
 515 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
 516  * Called after every association, but this runs only once!
 517  *  ... once chain noise is calibrated the first time, it's good forever.  */
 518 static void iwl4965_chain_noise_reset(struct iwl_priv *priv)
 519 {
 520         struct iwl_chain_noise_data *data = &(priv->chain_noise_data);
 521
 522         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
 523                 struct iwl_calib_diff_gain_cmd cmd;
 524
 525                 memset(&cmd, 0, sizeof(cmd));
 526                 cmd.opCode = IWL_PHY_CALIBRATE_DIFF_GAIN_CMD;
 527                 cmd.diff_gain_a = 0;
 528                 cmd.diff_gain_b = 0;
 529                 cmd.diff_gain_c = 0;
 530                 if (iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 531                                  sizeof(cmd), &cmd))
 532                         IWL_ERROR("Could not send REPLY_PHY_CALIBRATION_CMD\n");
 533                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
 534                 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
 535         }
 536 }
 537
 538 static void iwl4965_gain_computation(struct iwl_priv *priv,
 539                 u32 *average_noise,
 540                 u16 min_average_noise_antenna_i,
 541                 u32 min_average_noise)
 542 {
 543         int i, ret;
 544         struct iwl_chain_noise_data *data = &priv->chain_noise_data;
 545
 546         data->delta_gain_code[min_average_noise_antenna_i] = 0;
 547
 548         for (i = 0; i < NUM_RX_CHAINS; i++) {
 549                 s32 delta_g = 0;
 550
 551                 if (!(data->disconn_array[i]) &&
 552                     (data->delta_gain_code[i] ==
 553                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
 554                         delta_g = average_noise[i] - min_average_noise;
 555                         data->delta_gain_code[i] = (u8)((delta_g * 10) / 15);
 556                         data->delta_gain_code[i] =
 557                                 min(data->delta_gain_code[i],
 558                                 (u8) CHAIN_NOISE_MAX_DELTA_GAIN_CODE);
 559
 560                         data->delta_gain_code[i] =
 561                                 (data->delta_gain_code[i] | (1 << 2));
 562                 } else {
 563                         data->delta_gain_code[i] = 0;
 564                 }
 565         }
 566         IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
 567                      data->delta_gain_code[0],
 568                      data->delta_gain_code[1],
 569                      data->delta_gain_code[2]);
 570
 571         /* Differential gain gets sent to uCode only once */
 572         if (!data->radio_write) {
 573                 struct iwl_calib_diff_gain_cmd cmd;
 574                 data->radio_write = 1;
 575
 576                 memset(&cmd, 0, sizeof(cmd));
 577                 cmd.opCode = IWL_PHY_CALIBRATE_DIFF_GAIN_CMD;
 578                 cmd.diff_gain_a = data->delta_gain_code[0];
 579                 cmd.diff_gain_b = data->delta_gain_code[1];
 580                 cmd.diff_gain_c = data->delta_gain_code[2];
 581                 ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 582                                       sizeof(cmd), &cmd);
 583                 if (ret)
 584                         IWL_DEBUG_CALIB("fail sending cmd "
 585                                      "REPLY_PHY_CALIBRATION_CMD \n");
 586
 587                 /* TODO we might want recalculate
 588                  * rx_chain in rxon cmd */
 589
 590                 /* Mark so we run this algo only once! */
 591                 data->state = IWL_CHAIN_NOISE_CALIBRATED;
 592         }
 593         data->chain_noise_a = 0;
 594         data->chain_noise_b = 0;
 595         data->chain_noise_c = 0;
 596         data->chain_signal_a = 0;
 597         data->chain_signal_b = 0;
 598         data->chain_signal_c = 0;
 599         data->beacon_count = 0;
 600 }
 601
 602 static void iwl4965_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 603                         __le32 *tx_flags)
 604 {
 605         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 606                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 607                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 608         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 609                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 610                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 611         }
 612 }
 613
 614 static void iwl4965_bg_txpower_work(struct work_struct *work)
 615 {
 616         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 617                         txpower_work);
 618
 619         /* If a scan happened to start before we got here
 620          * then just return; the statistics notification will
 621          * kick off another scheduled work to compensate for
 622          * any temperature delta we missed here. */
 623         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 624             test_bit(STATUS_SCANNING, &priv->status))
 625                 return;
 626
 627         mutex_lock(&priv->mutex);
 628
 629         /* Regardless of if we are associated, we must reconfigure the
 630          * TX power since frames can be sent on non-radar channels while
 631          * not associated */
 632         iwl4965_send_tx_power(priv);
 633
 634         /* Update last_temperature to keep is_calib_needed from running
 635          * when it isn't needed... */
 636         priv->last_temperature = priv->temperature;
 637
 638         mutex_unlock(&priv->mutex);
 639 }
 640
 641 /*
 642  * Acquire priv->lock before calling this function !
 643  */
 644 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
 645 {
 646         iwl_write_direct32(priv, HBUS_TARG_WRPTR,
 647                              (index & 0xff) | (txq_id << 8));
 648         iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(txq_id), index);
 649 }
 650
 651 /**
 652  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
 653  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
 654  * @scd_retry: (1) Indicates queue will be used in aggregation mode
 655  *
 656  * NOTE:  Acquire priv->lock before calling this function !
 657  */
 658 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
 659                                         struct iwl_tx_queue *txq,
 660                                         int tx_fifo_id, int scd_retry)
 661 {
 662         int txq_id = txq->q.id;
 663
 664         /* Find out whether to activate Tx queue */
 665         int active = test_bit(txq_id, &priv->txq_ctx_active_msk) ? 1 : 0;
 666
 667         /* Set up and activate */
 668         iwl_write_prph(priv, IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
 669                          (active << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
 670                          (tx_fifo_id << IWL49_SCD_QUEUE_STTS_REG_POS_TXF) |
 671                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_WSL) |
 672                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
 673                          IWL49_SCD_QUEUE_STTS_REG_MSK);
 674
 675         txq->sched_retry = scd_retry;
 676
 677         IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
 678                        active ? "Activate" : "Deactivate",
 679                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
 680 }
 681
 682 static const u16 default_queue_to_tx_fifo[] = {
 683         IWL_TX_FIFO_AC3,
 684         IWL_TX_FIFO_AC2,
 685         IWL_TX_FIFO_AC1,
 686         IWL_TX_FIFO_AC0,
 687         IWL49_CMD_FIFO_NUM,
 688         IWL_TX_FIFO_HCCA_1,
 689         IWL_TX_FIFO_HCCA_2
 690 };
 691
 692 static int iwl4965_alive_notify(struct iwl_priv *priv)
 693 {
 694         u32 a;
 695         int i = 0;
 696         unsigned long flags;
 697         int ret;
 698
 699         spin_lock_irqsave(&priv->lock, flags);
 700
 701         ret = iwl_grab_nic_access(priv);
 702         if (ret) {
 703                 spin_unlock_irqrestore(&priv->lock, flags);
 704                 return ret;
 705         }
 706
 707         /* Clear 4965's internal Tx Scheduler data base */
 708         priv->scd_base_addr = iwl_read_prph(priv, IWL49_SCD_SRAM_BASE_ADDR);
 709         a = priv->scd_base_addr + IWL49_SCD_CONTEXT_DATA_OFFSET;
 710         for (; a < priv->scd_base_addr + IWL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
 711                 iwl_write_targ_mem(priv, a, 0);
 712         for (; a < priv->scd_base_addr + IWL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
 713                 iwl_write_targ_mem(priv, a, 0);
 714         for (; a < sizeof(u16) * priv->hw_params.max_txq_num; a += 4)
 715                 iwl_write_targ_mem(priv, a, 0);
 716
 717         /* Tel 4965 where to find Tx byte count tables */
 718         iwl_write_prph(priv, IWL49_SCD_DRAM_BASE_ADDR,
 719                         priv->scd_bc_tbls.dma >> 10);
 720
 721         /* Disable chain mode for all queues */
 722         iwl_write_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, 0);
 723
 724         /* Initialize each Tx queue (including the command queue) */
 725         for (i = 0; i < priv->hw_params.max_txq_num; i++) {
 726
 727                 /* TFD circular buffer read/write indexes */
 728                 iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(i), 0);
 729                 iwl_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
 730
 731                 /* Max Tx Window size for Scheduler-ACK mode */
 732                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 733                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i),
 734                                 (SCD_WIN_SIZE <<
 735                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
 736                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
 737
 738                 /* Frame limit */
 739                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 740                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
 741                                 sizeof(u32),
 742                                 (SCD_FRAME_LIMIT <<
 743                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
 744                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
 745
 746         }
 747         iwl_write_prph(priv, IWL49_SCD_INTERRUPT_MASK,
 748                                  (1 << priv->hw_params.max_txq_num) - 1);
 749
 750         /* Activate all Tx DMA/FIFO channels */
 751         priv->cfg->ops->lib->txq_set_sched(priv, IWL_MASK(0, 7));
 752
 753         iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
 754
 755         /* Map each Tx/cmd queue to its corresponding fifo */
 756         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
 757                 int ac = default_queue_to_tx_fifo[i];
 758                 iwl_txq_ctx_activate(priv, i);
 759                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
 760         }
 761
 762         iwl_release_nic_access(priv);
 763         spin_unlock_irqrestore(&priv->lock, flags);
 764
 765         return ret;
 766 }
 767
 768 static struct iwl_sensitivity_ranges iwl4965_sensitivity = {
 769         .min_nrg_cck = 97,
 770         .max_nrg_cck = 0,
 771
 772         .auto_corr_min_ofdm = 85,
 773         .auto_corr_min_ofdm_mrc = 170,
 774         .auto_corr_min_ofdm_x1 = 105,
 775         .auto_corr_min_ofdm_mrc_x1 = 220,
 776
 777         .auto_corr_max_ofdm = 120,
 778         .auto_corr_max_ofdm_mrc = 210,
 779         .auto_corr_max_ofdm_x1 = 140,
 780         .auto_corr_max_ofdm_mrc_x1 = 270,
 781
 782         .auto_corr_min_cck = 125,
 783         .auto_corr_max_cck = 200,
 784         .auto_corr_min_cck_mrc = 200,
 785         .auto_corr_max_cck_mrc = 400,
 786
 787         .nrg_th_cck = 100,
 788         .nrg_th_ofdm = 100,
 789 };
 790
 791 /**
 792  * iwl4965_hw_set_hw_params
 793  *
 794  * Called when initializing driver
 795  */
 796 static int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
 797 {
 798
 799         if ((priv->cfg->mod_params->num_of_queues > IWL49_NUM_QUEUES) ||
 800             (priv->cfg->mod_params->num_of_queues < IWL_MIN_NUM_QUEUES)) {
 801                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
 802                           IWL_MIN_NUM_QUEUES, IWL49_NUM_QUEUES);
 803                 return -EINVAL;
 804         }
 805
 806         priv->hw_params.max_txq_num = priv->cfg->mod_params->num_of_queues;
 807         priv->hw_params.scd_bc_tbls_size =
 808                         IWL49_NUM_QUEUES * sizeof(struct iwl4965_scd_bc_tbl);
 809         priv->hw_params.max_stations = IWL4965_STATION_COUNT;
 810         priv->hw_params.bcast_sta_id = IWL4965_BROADCAST_ID;
 811         priv->hw_params.max_data_size = IWL49_RTC_DATA_SIZE;
 812         priv->hw_params.max_inst_size = IWL49_RTC_INST_SIZE;
 813         priv->hw_params.max_bsm_size = BSM_SRAM_SIZE;
 814         priv->hw_params.fat_channel = BIT(IEEE80211_BAND_5GHZ);
 815
 816         priv->hw_params.tx_chains_num = 2;
 817         priv->hw_params.rx_chains_num = 2;
 818         priv->hw_params.valid_tx_ant = ANT_A | ANT_B;
 819         priv->hw_params.valid_rx_ant = ANT_A | ANT_B;
 820         priv->hw_params.ct_kill_threshold = CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD);
 821
 822         priv->hw_params.sens = &iwl4965_sensitivity;
 823
 824         return 0;
 825 }
 826
 827 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
 828 {
 829         s32 sign = 1;
 830
 831         if (num < 0) {
 832                 sign = -sign;
 833                 num = -num;
 834         }
 835         if (denom < 0) {
 836                 sign = -sign;
 837                 denom = -denom;
 838         }
 839         *res = 1;
 840         *res = ((num * 2 + denom) / (denom * 2)) * sign;
 841
 842         return 1;
 843 }
 844
 845 /**
 846  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
 847  *
 848  * Determines power supply voltage compensation for txpower calculations.
 849  * Returns number of 1/2-dB steps to subtract from gain table index,
 850  * to compensate for difference between power supply voltage during
 851  * factory measurements, vs. current power supply voltage.
 852  *
 853  * Voltage indication is higher for lower voltage.
 854  * Lower voltage requires more gain (lower gain table index).
 855  */
 856 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
 857                                             s32 current_voltage)
 858 {
 859         s32 comp = 0;
 860
 861         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
 862             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
 863                 return 0;
 864
 865         iwl4965_math_div_round(current_voltage - eeprom_voltage,
 866                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
 867
 868         if (current_voltage > eeprom_voltage)
 869                 comp *= 2;
 870         if ((comp < -2) || (comp > 2))
 871                 comp = 0;
 872
 873         return comp;
 874 }
 875
 876 static s32 iwl4965_get_tx_atten_grp(u16 channel)
 877 {
 878         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
 879             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
 880                 return CALIB_CH_GROUP_5;
 881
 882         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
 883             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
 884                 return CALIB_CH_GROUP_1;
 885
 886         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
 887             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
 888                 return CALIB_CH_GROUP_2;
 889
 890         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
 891             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
 892                 return CALIB_CH_GROUP_3;
 893
 894         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
 895             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
 896                 return CALIB_CH_GROUP_4;
 897
 898         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
 899         return -1;
 900 }
 901
 902 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
 903 {
 904         s32 b = -1;
 905
 906         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
 907                 if (priv->calib_info->band_info[b].ch_from == 0)
 908                         continue;
 909
 910                 if ((channel >= priv->calib_info->band_info[b].ch_from)
 911                     && (channel <= priv->calib_info->band_info[b].ch_to))
 912                         break;
 913         }
 914
 915         return b;
 916 }
 917
 918 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
 919 {
 920         s32 val;
 921
 922         if (x2 == x1)
 923                 return y1;
 924         else {
 925                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
 926                 return val + y2;
 927         }
 928 }
 929
 930 /**
 931  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
 932  *
 933  * Interpolates factory measurements from the two sample channels within a
 934  * sub-band, to apply to channel of interest.  Interpolation is proportional to
 935  * differences in channel frequencies, which is proportional to differences
 936  * in channel number.
 937  */
 938 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
 939                                     struct iwl_eeprom_calib_ch_info *chan_info)
 940 {
 941         s32 s = -1;
 942         u32 c;
 943         u32 m;
 944         const struct iwl_eeprom_calib_measure *m1;
 945         const struct iwl_eeprom_calib_measure *m2;
 946         struct iwl_eeprom_calib_measure *omeas;
 947         u32 ch_i1;
 948         u32 ch_i2;
 949
 950         s = iwl4965_get_sub_band(priv, channel);
 951         if (s >= EEPROM_TX_POWER_BANDS) {
 952                 IWL_ERROR("Tx Power can not find channel %d\n", channel);
 953                 return -1;
 954         }
 955
 956         ch_i1 = priv->calib_info->band_info[s].ch1.ch_num;
 957         ch_i2 = priv->calib_info->band_info[s].ch2.ch_num;
 958         chan_info->ch_num = (u8) channel;
 959
 960         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
 961                           channel, s, ch_i1, ch_i2);
 962
 963         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
 964                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
 965                         m1 = &(priv->calib_info->band_info[s].ch1.
 966                                measurements[c][m]);
 967                         m2 = &(priv->calib_info->band_info[s].ch2.
 968                                measurements[c][m]);
 969                         omeas = &(chan_info->measurements[c][m]);
 970
 971                         omeas->actual_pow =
 972                             (u8) iwl4965_interpolate_value(channel, ch_i1,
 973                                                            m1->actual_pow,
 974                                                            ch_i2,
 975                                                            m2->actual_pow);
 976                         omeas->gain_idx =
 977                             (u8) iwl4965_interpolate_value(channel, ch_i1,
 978                                                            m1->gain_idx, ch_i2,
 979                                                            m2->gain_idx);
 980                         omeas->temperature =
 981                             (u8) iwl4965_interpolate_value(channel, ch_i1,
 982                                                            m1->temperature,
 983                                                            ch_i2,
 984                                                            m2->temperature);
 985                         omeas->pa_det =
 986                             (s8) iwl4965_interpolate_value(channel, ch_i1,
 987                                                            m1->pa_det, ch_i2,
 988                                                            m2->pa_det);
 989
 990                         IWL_DEBUG_TXPOWER
 991                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
 992                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
 993                         IWL_DEBUG_TXPOWER
 994                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
 995                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
 996                         IWL_DEBUG_TXPOWER
 997                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
 998                              m1->pa_det, m2->pa_det, omeas->pa_det);
 999                         IWL_DEBUG_TXPOWER
1000                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
1001                              m1->temperature, m2->temperature,
1002                              omeas->temperature);
1003                 }
1004         }
1005
1006         return 0;
1007 }
1008
1009 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
1010  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
1011 static s32 back_off_table[] = {
1012         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
1013         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
1014         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
1015         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
1016         10                      /* CCK */
1017 };
1018
1019 /* Thermal compensation values for txpower for various frequency ranges ...
1020  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
1021 static struct iwl4965_txpower_comp_entry {
1022         s32 degrees_per_05db_a;
1023         s32 degrees_per_05db_a_denom;
1024 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
1025         {9, 2},                 /* group 0 5.2, ch  34-43 */
1026         {4, 1},                 /* group 1 5.2, ch  44-70 */
1027         {4, 1},                 /* group 2 5.2, ch  71-124 */
1028         {4, 1},                 /* group 3 5.2, ch 125-200 */
1029         {3, 1}                  /* group 4 2.4, ch   all */
1030 };
1031
1032 static s32 get_min_power_index(s32 rate_power_index, u32 band)
1033 {
1034         if (!band) {
1035                 if ((rate_power_index & 7) <= 4)
1036                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
1037         }
1038         return MIN_TX_GAIN_INDEX;
1039 }
1040
1041 struct gain_entry {
1042         u8 dsp;
1043         u8 radio;
1044 };
1045
1046 static const struct gain_entry gain_table[2][108] = {
1047         /* 5.2GHz power gain index table */
1048         {
1049          {123, 0x3F},           /* highest txpower */
1050          {117, 0x3F},
1051          {110, 0x3F},
1052          {104, 0x3F},
1053          {98, 0x3F},
1054          {110, 0x3E},
1055          {104, 0x3E},
1056          {98, 0x3E},
1057          {110, 0x3D},
1058          {104, 0x3D},
1059          {98, 0x3D},
1060          {110, 0x3C},
1061          {104, 0x3C},
1062          {98, 0x3C},
1063          {110, 0x3B},
1064          {104, 0x3B},
1065          {98, 0x3B},
1066          {110, 0x3A},
1067          {104, 0x3A},
1068          {98, 0x3A},
1069          {110, 0x39},
1070          {104, 0x39},
1071          {98, 0x39},
1072          {110, 0x38},
1073          {104, 0x38},
1074          {98, 0x38},
1075          {110, 0x37},
1076          {104, 0x37},
1077          {98, 0x37},
1078          {110, 0x36},
1079          {104, 0x36},
1080          {98, 0x36},
1081          {110, 0x35},
1082          {104, 0x35},
1083          {98, 0x35},
1084          {110, 0x34},
1085          {104, 0x34},
1086          {98, 0x34},
1087          {110, 0x33},
1088          {104, 0x33},
1089          {98, 0x33},
1090          {110, 0x32},
1091          {104, 0x32},
1092          {98, 0x32},
1093          {110, 0x31},
1094          {104, 0x31},
1095          {98, 0x31},
1096          {110, 0x30},
1097          {104, 0x30},
1098          {98, 0x30},
1099          {110, 0x25},
1100          {104, 0x25},
1101          {98, 0x25},
1102          {110, 0x24},
1103          {104, 0x24},
1104          {98, 0x24},
1105          {110, 0x23},
1106          {104, 0x23},
1107          {98, 0x23},
1108          {110, 0x22},
1109          {104, 0x18},
1110          {98, 0x18},
1111          {110, 0x17},
1112          {104, 0x17},
1113          {98, 0x17},
1114          {110, 0x16},
1115          {104, 0x16},
1116          {98, 0x16},
1117          {110, 0x15},
1118          {104, 0x15},
1119          {98, 0x15},
1120          {110, 0x14},
1121          {104, 0x14},
1122          {98, 0x14},
1123          {110, 0x13},
1124          {104, 0x13},
1125          {98, 0x13},
1126          {110, 0x12},
1127          {104, 0x08},
1128          {98, 0x08},
1129          {110, 0x07},
1130          {104, 0x07},
1131          {98, 0x07},
1132          {110, 0x06},
1133          {104, 0x06},
1134          {98, 0x06},
1135          {110, 0x05},
1136          {104, 0x05},
1137          {98, 0x05},
1138          {110, 0x04},
1139          {104, 0x04},
1140          {98, 0x04},
1141          {110, 0x03},
1142          {104, 0x03},
1143          {98, 0x03},
1144          {110, 0x02},
1145          {104, 0x02},
1146          {98, 0x02},
1147          {110, 0x01},
1148          {104, 0x01},
1149          {98, 0x01},
1150          {110, 0x00},
1151          {104, 0x00},
1152          {98, 0x00},
1153          {93, 0x00},
1154          {88, 0x00},
1155          {83, 0x00},
1156          {78, 0x00},
1157          },
1158         /* 2.4GHz power gain index table */
1159         {
1160          {110, 0x3f},           /* highest txpower */
1161          {104, 0x3f},
1162          {98, 0x3f},
1163          {110, 0x3e},
1164          {104, 0x3e},
1165          {98, 0x3e},
1166          {110, 0x3d},
1167          {104, 0x3d},
1168          {98, 0x3d},
1169          {110, 0x3c},
1170          {104, 0x3c},
1171          {98, 0x3c},
1172          {110, 0x3b},
1173          {104, 0x3b},
1174          {98, 0x3b},
1175          {110, 0x3a},
1176          {104, 0x3a},
1177          {98, 0x3a},
1178          {110, 0x39},
1179          {104, 0x39},
1180          {98, 0x39},
1181          {110, 0x38},
1182          {104, 0x38},
1183          {98, 0x38},
1184          {110, 0x37},
1185          {104, 0x37},
1186          {98, 0x37},
1187          {110, 0x36},
1188          {104, 0x36},
1189          {98, 0x36},
1190          {110, 0x35},
1191          {104, 0x35},
1192          {98, 0x35},
1193          {110, 0x34},
1194          {104, 0x34},
1195          {98, 0x34},
1196          {110, 0x33},
1197          {104, 0x33},
1198          {98, 0x33},
1199          {110, 0x32},
1200          {104, 0x32},
1201          {98, 0x32},
1202          {110, 0x31},
1203          {104, 0x31},
1204          {98, 0x31},
1205          {110, 0x30},
1206          {104, 0x30},
1207          {98, 0x30},
1208          {110, 0x6},
1209          {104, 0x6},
1210          {98, 0x6},
1211          {110, 0x5},
1212          {104, 0x5},
1213          {98, 0x5},
1214          {110, 0x4},
1215          {104, 0x4},
1216          {98, 0x4},
1217          {110, 0x3},
1218          {104, 0x3},
1219          {98, 0x3},
1220          {110, 0x2},
1221          {104, 0x2},
1222          {98, 0x2},
1223          {110, 0x1},
1224          {104, 0x1},
1225          {98, 0x1},
1226          {110, 0x0},
1227          {104, 0x0},
1228          {98, 0x0},
1229          {97, 0},
1230          {96, 0},
1231          {95, 0},
1232          {94, 0},
1233          {93, 0},
1234          {92, 0},
1235          {91, 0},
1236          {90, 0},
1237          {89, 0},
1238          {88, 0},
1239          {87, 0},
1240          {86, 0},
1241          {85, 0},
1242          {84, 0},
1243          {83, 0},
1244          {82, 0},
1245          {81, 0},
1246          {80, 0},
1247          {79, 0},
1248          {78, 0},
1249          {77, 0},
1250          {76, 0},
1251          {75, 0},
1252          {74, 0},
1253          {73, 0},
1254          {72, 0},
1255          {71, 0},
1256          {70, 0},
1257          {69, 0},
1258          {68, 0},
1259          {67, 0},
1260          {66, 0},
1261          {65, 0},
1262          {64, 0},
1263          {63, 0},
1264          {62, 0},
1265          {61, 0},
1266          {60, 0},
1267          {59, 0},
1268          }
1269 };
1270
1271 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
1272                                     u8 is_fat, u8 ctrl_chan_high,
1273                                     struct iwl4965_tx_power_db *tx_power_tbl)
1274 {
1275         u8 saturation_power;
1276         s32 target_power;
1277         s32 user_target_power;
1278         s32 power_limit;
1279         s32 current_temp;
1280         s32 reg_limit;
1281         s32 current_regulatory;
1282         s32 txatten_grp = CALIB_CH_GROUP_MAX;
1283         int i;
1284         int c;
1285         const struct iwl_channel_info *ch_info = NULL;
1286         struct iwl_eeprom_calib_ch_info ch_eeprom_info;
1287         const struct iwl_eeprom_calib_measure *measurement;
1288         s16 voltage;
1289         s32 init_voltage;
1290         s32 voltage_compensation;
1291         s32 degrees_per_05db_num;
1292         s32 degrees_per_05db_denom;
1293         s32 factory_temp;
1294         s32 temperature_comp[2];
1295         s32 factory_gain_index[2];
1296         s32 factory_actual_pwr[2];
1297         s32 power_index;
1298
1299         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
1300          *   are used for indexing into txpower table) */
1301         user_target_power = 2 * priv->tx_power_user_lmt;
1302
1303         /* Get current (RXON) channel, band, width */
1304         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
1305                           is_fat);
1306
1307         ch_info = iwl_get_channel_info(priv, priv->band, channel);
1308
1309         if (!is_channel_valid(ch_info))
1310                 return -EINVAL;
1311
1312         /* get txatten group, used to select 1) thermal txpower adjustment
1313          *   and 2) mimo txpower balance between Tx chains. */
1314         txatten_grp = iwl4965_get_tx_atten_grp(channel);
1315         if (txatten_grp < 0)
1316                 return -EINVAL;
1317
1318         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
1319                           channel, txatten_grp);
1320
1321         if (is_fat) {
1322                 if (ctrl_chan_high)
1323                         channel -= 2;
1324                 else
1325                         channel += 2;
1326         }
1327
1328         /* hardware txpower limits ...
1329          * saturation (clipping distortion) txpowers are in half-dBm */
1330         if (band)
1331                 saturation_power = priv->calib_info->saturation_power24;
1332         else
1333                 saturation_power = priv->calib_info->saturation_power52;
1334
1335         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
1336             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
1337                 if (band)
1338                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
1339                 else
1340                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
1341         }
1342
1343         /* regulatory txpower limits ... reg_limit values are in half-dBm,
1344          *   max_power_avg values are in dBm, convert * 2 */
1345         if (is_fat)
1346                 reg_limit = ch_info->fat_max_power_avg * 2;
1347         else
1348                 reg_limit = ch_info->max_power_avg * 2;
1349
1350         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
1351             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
1352                 if (band)
1353                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
1354                 else
1355                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
1356         }
1357
1358         /* Interpolate txpower calibration values for this channel,
1359          *   based on factory calibration tests on spaced channels. */
1360         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
1361
1362         /* calculate tx gain adjustment based on power supply voltage */
1363         voltage = priv->calib_info->voltage;
1364         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
1365         voltage_compensation =
1366             iwl4965_get_voltage_compensation(voltage, init_voltage);
1367
1368         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
1369                           init_voltage,
1370                           voltage, voltage_compensation);
1371
1372         /* get current temperature (Celsius) */
1373         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
1374         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
1375         current_temp = KELVIN_TO_CELSIUS(current_temp);
1376
1377         /* select thermal txpower adjustment params, based on channel group
1378          *   (same frequency group used for mimo txatten adjustment) */
1379         degrees_per_05db_num =
1380             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
1381         degrees_per_05db_denom =
1382             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
1383
1384         /* get per-chain txpower values from factory measurements */
1385         for (c = 0; c < 2; c++) {
1386                 measurement = &ch_eeprom_info.measurements[c][1];
1387
1388                 /* txgain adjustment (in half-dB steps) based on difference
1389                  *   between factory and current temperature */
1390                 factory_temp = measurement->temperature;
1391                 iwl4965_math_div_round((current_temp - factory_temp) *
1392                                        degrees_per_05db_denom,
1393                                        degrees_per_05db_num,
1394                                        &temperature_comp[c]);
1395
1396                 factory_gain_index[c] = measurement->gain_idx;
1397                 factory_actual_pwr[c] = measurement->actual_pow;
1398
1399                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
1400                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
1401                                   "curr tmp %d, comp %d steps\n",
1402                                   factory_temp, current_temp,
1403                                   temperature_comp[c]);
1404
1405                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
1406                                   factory_gain_index[c],
1407                                   factory_actual_pwr[c]);
1408         }
1409
1410         /* for each of 33 bit-rates (including 1 for CCK) */
1411         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
1412                 u8 is_mimo_rate;
1413                 union iwl4965_tx_power_dual_stream tx_power;
1414
1415                 /* for mimo, reduce each chain's txpower by half
1416                  * (3dB, 6 steps), so total output power is regulatory
1417                  * compliant. */
1418                 if (i & 0x8) {
1419                         current_regulatory = reg_limit -
1420                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
1421                         is_mimo_rate = 1;
1422                 } else {
1423                         current_regulatory = reg_limit;
1424                         is_mimo_rate = 0;
1425                 }
1426
1427                 /* find txpower limit, either hardware or regulatory */
1428                 power_limit = saturation_power - back_off_table[i];
1429                 if (power_limit > current_regulatory)
1430                         power_limit = current_regulatory;
1431
1432                 /* reduce user's txpower request if necessary
1433                  * for this rate on this channel */
1434                 target_power = user_target_power;
1435                 if (target_power > power_limit)
1436                         target_power = power_limit;
1437
1438                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
1439                                   i, saturation_power - back_off_table[i],
1440                                   current_regulatory, user_target_power,
1441                                   target_power);
1442
1443                 /* for each of 2 Tx chains (radio transmitters) */
1444                 for (c = 0; c < 2; c++) {
1445                         s32 atten_value;
1446
1447                         if (is_mimo_rate)
1448                                 atten_value =
1449                                     (s32)le32_to_cpu(priv->card_alive_init.
1450                                     tx_atten[txatten_grp][c]);
1451                         else
1452                                 atten_value = 0;
1453
1454                         /* calculate index; higher index means lower txpower */
1455                         power_index = (u8) (factory_gain_index[c] -
1456                                             (target_power -
1457                                              factory_actual_pwr[c]) -
1458                                             temperature_comp[c] -
1459                                             voltage_compensation +
1460                                             atten_value);
1461
1462 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
1463                                                 power_index); */
1464
1465                         if (power_index < get_min_power_index(i, band))
1466                                 power_index = get_min_power_index(i, band);
1467
1468                         /* adjust 5 GHz index to support negative indexes */
1469                         if (!band)
1470                                 power_index += 9;
1471
1472                         /* CCK, rate 32, reduce txpower for CCK */
1473                         if (i == POWER_TABLE_CCK_ENTRY)
1474                                 power_index +=
1475                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
1476
1477                         /* stay within the table! */
1478                         if (power_index > 107) {
1479                                 IWL_WARNING("txpower index %d > 107\n",
1480                                             power_index);
1481                                 power_index = 107;
1482                         }
1483                         if (power_index < 0) {
1484                                 IWL_WARNING("txpower index %d < 0\n",
1485                                             power_index);
1486                                 power_index = 0;
1487                         }
1488
1489                         /* fill txpower command for this rate/chain */
1490                         tx_power.s.radio_tx_gain[c] =
1491                                 gain_table[band][power_index].radio;
1492                         tx_power.s.dsp_predis_atten[c] =
1493                                 gain_table[band][power_index].dsp;
1494
1495                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
1496                                           "gain 0x%02x dsp %d\n",
1497                                           c, atten_value, power_index,
1498                                         tx_power.s.radio_tx_gain[c],
1499                                         tx_power.s.dsp_predis_atten[c]);
1500                 } /* for each chain */
1501
1502                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
1503
1504         } /* for each rate */
1505
1506         return 0;
1507 }
1508
1509 /**
1510  * iwl4965_send_tx_power - Configure the TXPOWER level user limit
1511  *
1512  * Uses the active RXON for channel, band, and characteristics (fat, high)
1513  * The power limit is taken from priv->tx_power_user_lmt.
1514  */
1515 static int iwl4965_send_tx_power(struct iwl_priv *priv)
1516 {
1517         struct iwl4965_txpowertable_cmd cmd = { 0 };
1518         int ret;
1519         u8 band = 0;
1520         u8 is_fat = 0;
1521         u8 ctrl_chan_high = 0;
1522
1523         if (test_bit(STATUS_SCANNING, &priv->status)) {
1524                 /* If this gets hit a lot, switch it to a BUG() and catch
1525                  * the stack trace to find out who is calling this during
1526                  * a scan. */
1527                 IWL_WARNING("TX Power requested while scanning!\n");
1528                 return -EAGAIN;
1529         }
1530
1531         band = priv->band == IEEE80211_BAND_2GHZ;
1532
1533         is_fat =  is_fat_channel(priv->active_rxon.flags);
1534
1535         if (is_fat &&
1536             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1537                 ctrl_chan_high = 1;
1538
1539         cmd.band = band;
1540         cmd.channel = priv->active_rxon.channel;
1541
1542         ret = iwl4965_fill_txpower_tbl(priv, band,
1543                                 le16_to_cpu(priv->active_rxon.channel),
1544                                 is_fat, ctrl_chan_high, &cmd.tx_power);
1545         if (ret)
1546                 goto out;
1547
1548         ret = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
1549
1550 out:
1551         return ret;
1552 }
1553
1554 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
1555 {
1556         int ret = 0;
1557         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1558         const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1559         const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1560
1561         if ((rxon1->flags == rxon2->flags) &&
1562             (rxon1->filter_flags == rxon2->filter_flags) &&
1563             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1564             (rxon1->ofdm_ht_single_stream_basic_rates ==
1565              rxon2->ofdm_ht_single_stream_basic_rates) &&
1566             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1567              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1568             (rxon1->rx_chain == rxon2->rx_chain) &&
1569             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1570                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1571                 return 0;
1572         }
1573
1574         rxon_assoc.flags = priv->staging_rxon.flags;
1575         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1576         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1577         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1578         rxon_assoc.reserved = 0;
1579         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1580             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1581         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1582             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1583         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1584
1585         ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
1586                                      sizeof(rxon_assoc), &rxon_assoc, NULL);
1587         if (ret)
1588                 return ret;
1589
1590         return ret;
1591 }
1592
1593 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
1594 static int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
1595 {
1596         int rc;
1597         u8 band = 0;
1598         u8 is_fat = 0;
1599         u8 ctrl_chan_high = 0;
1600         struct iwl4965_channel_switch_cmd cmd = { 0 };
1601         const struct iwl_channel_info *ch_info;
1602
1603         band = priv->band == IEEE80211_BAND_2GHZ;
1604
1605         ch_info = iwl_get_channel_info(priv, priv->band, channel);
1606
1607         is_fat = is_fat_channel(priv->staging_rxon.flags);
1608
1609         if (is_fat &&
1610             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1611                 ctrl_chan_high = 1;
1612
1613         cmd.band = band;
1614         cmd.expect_beacon = 0;
1615         cmd.channel = cpu_to_le16(channel);
1616         cmd.rxon_flags = priv->active_rxon.flags;
1617         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
1618         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
1619         if (ch_info)
1620                 cmd.expect_beacon = is_channel_radar(ch_info);
1621         else
1622                 cmd.expect_beacon = 1;
1623
1624         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
1625                                       ctrl_chan_high, &cmd.tx_power);
1626         if (rc) {
1627                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
1628                 return rc;
1629         }
1630
1631         rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
1632         return rc;
1633 }
1634 #endif
1635
1636 /**
1637  * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
1638  */
1639 static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
1640                                             struct iwl_tx_queue *txq,
1641                                             u16 byte_cnt)
1642 {
1643         struct iwl4965_scd_bc_tbl *scd_bc_tbl = priv->scd_bc_tbls.addr;
1644         int txq_id = txq->q.id;
1645         int write_ptr = txq->q.write_ptr;
1646         int len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
1647         __le16 bc_ent;
1648
1649         WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX);
1650
1651         bc_ent = cpu_to_le16(len & 0xFFF);
1652         /* Set up byte count within first 256 entries */
1653         scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent;
1654
1655         /* If within first 64 entries, duplicate at end */
1656         if (write_ptr < TFD_QUEUE_SIZE_BC_DUP)
1657                 scd_bc_tbl[txq_id].
1658                         tfd_offset[TFD_QUEUE_SIZE_MAX + write_ptr] = bc_ent;
1659 }
1660
1661 /**
1662  * sign_extend - Sign extend a value using specified bit as sign-bit
1663  *
1664  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
1665  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
1666  *
1667  * @param oper value to sign extend
1668  * @param index 0 based bit index (0<=index<32) to sign bit
1669  */
1670 static s32 sign_extend(u32 oper, int index)
1671 {
1672         u8 shift = 31 - index;
1673
1674         return (s32)(oper << shift) >> shift;
1675 }
1676
1677 /**
1678  * iwl4965_hw_get_temperature - return the calibrated temperature (in Kelvin)
1679  * @statistics: Provides the temperature reading from the uCode
1680  *
1681  * A return of <0 indicates bogus data in the statistics
1682  */
1683 static int iwl4965_hw_get_temperature(const struct iwl_priv *priv)
1684 {
1685         s32 temperature;
1686         s32 vt;
1687         s32 R1, R2, R3;
1688         u32 R4;
1689
1690         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
1691                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
1692                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
1693                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
1694                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
1695                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
1696                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
1697         } else {
1698                 IWL_DEBUG_TEMP("Running temperature calibration\n");
1699                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
1700                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
1701                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
1702                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
1703         }
1704
1705         /*
1706          * Temperature is only 23 bits, so sign extend out to 32.
1707          *
1708          * NOTE If we haven't received a statistics notification yet
1709          * with an updated temperature, use R4 provided to us in the
1710          * "initialize" ALIVE response.
1711          */
1712         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
1713                 vt = sign_extend(R4, 23);
1714         else
1715                 vt = sign_extend(
1716                         le32_to_cpu(priv->statistics.general.temperature), 23);
1717
1718         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n", R1, R2, R3, vt);
1719
1720         if (R3 == R1) {
1721                 IWL_ERROR("Calibration conflict R1 == R3\n");
1722                 return -1;
1723         }
1724
1725         /* Calculate temperature in degrees Kelvin, adjust by 97%.
1726          * Add offset to center the adjustment around 0 degrees Centigrade. */
1727         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
1728         temperature /= (R3 - R1);
1729         temperature = (temperature * 97) / 100 + TEMPERATURE_CALIB_KELVIN_OFFSET;
1730
1731         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n",
1732                         temperature, KELVIN_TO_CELSIUS(temperature));
1733
1734         return temperature;
1735 }
1736
1737 /* Adjust Txpower only if temperature variance is greater than threshold. */
1738 #define IWL_TEMPERATURE_THRESHOLD   3
1739
1740 /**
1741  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
1742  *
1743  * If the temperature changed has changed sufficiently, then a recalibration
1744  * is needed.
1745  *
1746  * Assumes caller will replace priv->last_temperature once calibration
1747  * executed.
1748  */
1749 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
1750 {
1751         int temp_diff;
1752
1753         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
1754                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
1755                 return 0;
1756         }
1757
1758         temp_diff = priv->temperature - priv->last_temperature;
1759
1760         /* get absolute value */
1761         if (temp_diff < 0) {
1762                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
1763                 temp_diff = -temp_diff;
1764         } else if (temp_diff == 0)
1765                 IWL_DEBUG_POWER("Same temp, \n");
1766         else
1767                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
1768
1769         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
1770                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
1771                 return 0;
1772         }
1773
1774         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
1775
1776         return 1;
1777 }
1778
1779 static void iwl4965_temperature_calib(struct iwl_priv *priv)
1780 {
1781         s32 temp;
1782
1783         temp = iwl4965_hw_get_temperature(priv);
1784         if (temp < 0)
1785                 return;
1786
1787         if (priv->temperature != temp) {
1788                 if (priv->temperature)
1789                         IWL_DEBUG_TEMP("Temperature changed "
1790                                        "from %dC to %dC\n",
1791                                        KELVIN_TO_CELSIUS(priv->temperature),
1792                                        KELVIN_TO_CELSIUS(temp));
1793                 else
1794                         IWL_DEBUG_TEMP("Temperature "
1795                                        "initialized to %dC\n",
1796                                        KELVIN_TO_CELSIUS(temp));
1797         }
1798
1799         priv->temperature = temp;
1800         set_bit(STATUS_TEMPERATURE, &priv->status);
1801
1802         if (!priv->disable_tx_power_cal &&
1803              unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
1804              iwl4965_is_temp_calib_needed(priv))
1805                 queue_work(priv->workqueue, &priv->txpower_work);
1806 }
1807
1808 /**
1809  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
1810  */
1811 static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
1812                                             u16 txq_id)
1813 {
1814         /* Simply stop the queue, but don't change any configuration;
1815          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
1816         iwl_write_prph(priv,
1817                 IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
1818                 (0 << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE)|
1819                 (1 << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
1820 }
1821
1822 /**
1823  * txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE
1824  * priv->lock must be held by the caller
1825  */
1826 static int iwl4965_txq_agg_disable(struct iwl_priv *priv, u16 txq_id,
1827                                    u16 ssn_idx, u8 tx_fifo)
1828 {
1829         int ret = 0;
1830
1831         if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
1832             (IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES <= txq_id)) {
1833                 IWL_WARNING("queue number out of range: %d, must be %d to %d\n",
1834                         txq_id, IWL49_FIRST_AMPDU_QUEUE,
1835                         IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES - 1);
1836                 return -EINVAL;
1837         }
1838
1839         ret = iwl_grab_nic_access(priv);
1840         if (ret)
1841                 return ret;
1842
1843         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
1844
1845         iwl_clear_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
1846
1847         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
1848         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
1849         /* supposes that ssn_idx is valid (!= 0xFFF) */
1850         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
1851
1852         iwl_clear_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
1853         iwl_txq_ctx_deactivate(priv, txq_id);
1854         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
1855
1856         iwl_release_nic_access(priv);
1857
1858         return 0;
1859 }
1860
1861 /**
1862  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
1863  */
1864 static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
1865                                         u16 txq_id)
1866 {
1867         u32 tbl_dw_addr;
1868         u32 tbl_dw;
1869         u16 scd_q2ratid;
1870
1871         scd_q2ratid = ra_tid & IWL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
1872
1873         tbl_dw_addr = priv->scd_base_addr +
1874                         IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
1875
1876         tbl_dw = iwl_read_targ_mem(priv, tbl_dw_addr);
1877
1878         if (txq_id & 0x1)
1879                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
1880         else
1881                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
1882
1883         iwl_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
1884
1885         return 0;
1886 }
1887
1888
1889 /**
1890  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
1891  *
1892  * NOTE:  txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE,
1893  *        i.e. it must be one of the higher queues used for aggregation
1894  */
1895 static int iwl4965_txq_agg_enable(struct iwl_priv *priv, int txq_id,
1896                                   int tx_fifo, int sta_id, int tid, u16 ssn_idx)
1897 {
1898         unsigned long flags;
1899         int ret;
1900         u16 ra_tid;
1901
1902         if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
1903             (IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES <= txq_id)) {
1904                 IWL_WARNING("queue number out of range: %d, must be %d to %d\n",
1905                         txq_id, IWL49_FIRST_AMPDU_QUEUE,
1906                         IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES - 1);
1907                 return -EINVAL;
1908         }
1909
1910         ra_tid = BUILD_RAxTID(sta_id, tid);
1911
1912         /* Modify device's station table to Tx this TID */
1913         iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
1914
1915         spin_lock_irqsave(&priv->lock, flags);
1916         ret = iwl_grab_nic_access(priv);
1917         if (ret) {
1918                 spin_unlock_irqrestore(&priv->lock, flags);
1919                 return ret;
1920         }
1921
1922         /* Stop this Tx queue before configuring it */
1923         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
1924
1925         /* Map receiver-address / traffic-ID to this queue */
1926         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
1927
1928         /* Set this queue as a chain-building queue */
1929         iwl_set_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
1930
1931         /* Place first TFD at index corresponding to start sequence number.
1932          * Assumes that ssn_idx is valid (!= 0xFFF) */
1933         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
1934         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
1935         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
1936
1937         /* Set up Tx window size and frame limit for this queue */
1938         iwl_write_targ_mem(priv,
1939                 priv->scd_base_addr + IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
1940                 (SCD_WIN_SIZE << IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1941                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1942
1943         iwl_write_targ_mem(priv, priv->scd_base_addr +
1944                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
1945                 (SCD_FRAME_LIMIT << IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
1946                 & IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1947
1948         iwl_set_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
1949
1950         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
1951         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
1952
1953         iwl_release_nic_access(priv);
1954         spin_unlock_irqrestore(&priv->lock, flags);
1955
1956         return 0;
1957 }
1958
1959
1960 static u16 iwl4965_get_hcmd_size(u8 cmd_id, u16 len)
1961 {
1962         switch (cmd_id) {
1963         case REPLY_RXON:
1964                 return (u16) sizeof(struct iwl4965_rxon_cmd);
1965         default:
1966                 return len;
1967         }
1968 }
1969
1970 static u16 iwl4965_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
1971 {
1972         struct iwl4965_addsta_cmd *addsta = (struct iwl4965_addsta_cmd *)data;
1973         addsta->mode = cmd->mode;
1974         memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
1975         memcpy(&addsta->key, &cmd->key, sizeof(struct iwl4965_keyinfo));
1976         addsta->station_flags = cmd->station_flags;
1977         addsta->station_flags_msk = cmd->station_flags_msk;
1978         addsta->tid_disable_tx = cmd->tid_disable_tx;
1979         addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
1980         addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
1981         addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
1982         addsta->reserved1 = __constant_cpu_to_le16(0);
1983         addsta->reserved2 = __constant_cpu_to_le32(0);
1984
1985         return (u16)sizeof(struct iwl4965_addsta_cmd);
1986 }
1987
1988 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
1989 {
1990         return le32_to_cpup(&tx_resp->u.status + tx_resp->frame_count) & MAX_SN;
1991 }
1992
1993 /**
1994  * iwl4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue
1995  */
1996 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
1997                                       struct iwl_ht_agg *agg,
1998                                       struct iwl4965_tx_resp *tx_resp,
1999                                       int txq_id, u16 start_idx)
2000 {
2001         u16 status;
2002         struct agg_tx_status *frame_status = tx_resp->u.agg_status;
2003         struct ieee80211_tx_info *info = NULL;
2004         struct ieee80211_hdr *hdr = NULL;
2005         u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2006         int i, sh, idx;
2007         u16 seq;
2008         if (agg->wait_for_ba)
2009                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2010
2011         agg->frame_count = tx_resp->frame_count;
2012         agg->start_idx = start_idx;
2013         agg->rate_n_flags = rate_n_flags;
2014         agg->bitmap = 0;
2015
2016         /* num frames attempted by Tx command */
2017         if (agg->frame_count == 1) {
2018                 /* Only one frame was attempted; no block-ack will arrive */
2019                 status = le16_to_cpu(frame_status[0].status);
2020                 idx = start_idx;
2021
2022                 /* FIXME: code repetition */
2023                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2024                                    agg->frame_count, agg->start_idx, idx);
2025
2026                 info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb[0]);
2027                 info->status.rates[0].count = tx_resp->failure_frame + 1;
2028                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
2029                 info->flags |= iwl_is_tx_success(status) ?
2030                         IEEE80211_TX_STAT_ACK : 0;
2031                 iwl_hwrate_to_tx_control(priv, rate_n_flags, info);
2032                 /* FIXME: code repetition end */
2033
2034                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2035                                     status & 0xff, tx_resp->failure_frame);
2036                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n", rate_n_flags);
2037
2038                 agg->wait_for_ba = 0;
2039         } else {
2040                 /* Two or more frames were attempted; expect block-ack */
2041                 u64 bitmap = 0;
2042                 int start = agg->start_idx;
2043
2044                 /* Construct bit-map of pending frames within Tx window */
2045                 for (i = 0; i < agg->frame_count; i++) {
2046                         u16 sc;
2047                         status = le16_to_cpu(frame_status[i].status);
2048                         seq  = le16_to_cpu(frame_status[i].sequence);
2049                         idx = SEQ_TO_INDEX(seq);
2050                         txq_id = SEQ_TO_QUEUE(seq);
2051
2052                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2053                                       AGG_TX_STATE_ABORT_MSK))
2054                                 continue;
2055
2056                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2057                                            agg->frame_count, txq_id, idx);
2058
2059                         hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
2060
2061                         sc = le16_to_cpu(hdr->seq_ctrl);
2062                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2063                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
2064                                           " idx=%d, seq_idx=%d, seq=%d\n",
2065                                           idx, SEQ_TO_SN(sc),
2066                                           hdr->seq_ctrl);
2067                                 return -1;
2068                         }
2069
2070                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2071                                            i, idx, SEQ_TO_SN(sc));
2072
2073                         sh = idx - start;
2074                         if (sh > 64) {
2075                                 sh = (start - idx) + 0xff;
2076                                 bitmap = bitmap << sh;
2077                                 sh = 0;
2078                                 start = idx;
2079                         } else if (sh < -64)
2080                                 sh  = 0xff - (start - idx);
2081                         else if (sh < 0) {
2082                                 sh = start - idx;
2083                                 start = idx;
2084                                 bitmap = bitmap << sh;
2085                                 sh = 0;
2086                         }
2087                         bitmap |= 1ULL << sh;
2088                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%llx\n",
2089                                            start, (unsigned long long)bitmap);
2090                 }
2091
2092                 agg->bitmap = bitmap;
2093                 agg->start_idx = start;
2094                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2095                                    agg->frame_count, agg->start_idx,
2096                                    (unsigned long long)agg->bitmap);
2097
2098                 if (bitmap)
2099                         agg->wait_for_ba = 1;
2100         }
2101         return 0;
2102 }
2103
2104 /**
2105  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2106  */
2107 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2108                                 struct iwl_rx_mem_buffer *rxb)
2109 {
2110         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2111         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2112         int txq_id = SEQ_TO_QUEUE(sequence);
2113         int index = SEQ_TO_INDEX(sequence);
2114         struct iwl_tx_queue *txq = &priv->txq[txq_id];
2115         struct ieee80211_hdr *hdr;
2116         struct ieee80211_tx_info *info;
2117         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2118         u32  status = le32_to_cpu(tx_resp->u.status);
2119         int tid = MAX_TID_COUNT;
2120         int sta_id;
2121         int freed;
2122         u8 *qc = NULL;
2123
2124         if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
2125                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2126                           "is out of range [0-%d] %d %d\n", txq_id,
2127                           index, txq->q.n_bd, txq->q.write_ptr,
2128                           txq->q.read_ptr);
2129                 return;
2130         }
2131
2132         info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]);
2133         memset(&info->status, 0, sizeof(info->status));
2134
2135         hdr = iwl_tx_queue_get_hdr(priv, txq_id, index);
2136         if (ieee80211_is_data_qos(hdr->frame_control)) {
2137                 qc = ieee80211_get_qos_ctl(hdr);
2138                 tid = qc[0] & 0xf;
2139         }
2140
2141         sta_id = iwl_get_ra_sta_id(priv, hdr);
2142         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2143                 IWL_ERROR("Station not known\n");
2144                 return;
2145         }
2146
2147         if (txq->sched_retry) {
2148                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2149                 struct iwl_ht_agg *agg = NULL;
2150
2151                 WARN_ON(!qc);
2152
2153                 agg = &priv->stations[sta_id].tid[tid].agg;
2154
2155                 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
2156
2157                 /* check if BAR is needed */
2158                 if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status))
2159                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
2160
2161                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2162                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2163                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
2164                                            "%d index %d\n", scd_ssn , index);
2165                         freed = iwl_tx_queue_reclaim(priv, txq_id, index);
2166                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2167
2168                         if (priv->mac80211_registered &&
2169                             (iwl_queue_space(&txq->q) > txq->q.low_mark) &&
2170                             (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)) {
2171                                 if (agg->state == IWL_AGG_OFF)
2172                                         ieee80211_wake_queue(priv->hw, txq_id);
2173                                 else
2174                                         ieee80211_wake_queue(priv->hw,
2175                                                              txq->swq_id);
2176                         }
2177                 }
2178         } else {
2179                 info->status.rates[0].count = tx_resp->failure_frame + 1;
2180                 info->flags |= iwl_is_tx_success(status) ?
2181                                         IEEE80211_TX_STAT_ACK : 0;
2182                 iwl_hwrate_to_tx_control(priv,
2183                                         le32_to_cpu(tx_resp->rate_n_flags),
2184                                         info);
2185
2186                 IWL_DEBUG_TX_REPLY("TXQ %d status %s (0x%08x) "
2187                                    "rate_n_flags 0x%x retries %d\n",
2188                                    txq_id,
2189                                    iwl_get_tx_fail_reason(status), status,
2190                                    le32_to_cpu(tx_resp->rate_n_flags),
2191                                    tx_resp->failure_frame);
2192
2193                 freed = iwl_tx_queue_reclaim(priv, txq_id, index);
2194                 if (qc && likely(sta_id != IWL_INVALID_STATION))
2195                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2196
2197                 if (priv->mac80211_registered &&
2198                     (iwl_queue_space(&txq->q) > txq->q.low_mark))
2199                         ieee80211_wake_queue(priv->hw, txq_id);
2200         }
2201
2202         if (qc && likely(sta_id != IWL_INVALID_STATION))
2203                 iwl_txq_check_empty(priv, sta_id, tid, txq_id);
2204
2205         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
2206                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
2207 }
2208
2209 static int iwl4965_calc_rssi(struct iwl_priv *priv,
2210                              struct iwl_rx_phy_res *rx_resp)
2211 {
2212         /* data from PHY/DSP regarding signal strength, etc.,
2213          *   contents are always there, not configurable by host.  */
2214         struct iwl4965_rx_non_cfg_phy *ncphy =
2215             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
2216         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL49_AGC_DB_MASK)
2217                         >> IWL49_AGC_DB_POS;
2218
2219         u32 valid_antennae =
2220             (le16_to_cpu(rx_resp->phy_flags) & IWL49_RX_PHY_FLAGS_ANTENNAE_MASK)
2221                         >> IWL49_RX_PHY_FLAGS_ANTENNAE_OFFSET;
2222         u8 max_rssi = 0;
2223         u32 i;
2224
2225         /* Find max rssi among 3 possible receivers.
2226          * These values are measured by the digital signal processor (DSP).
2227          * They should stay fairly constant even as the signal strength varies,
2228          *   if the radio's automatic gain control (AGC) is working right.
2229          * AGC value (see below) will provide the "interesting" info. */
2230         for (i = 0; i < 3; i++)
2231                 if (valid_antennae & (1 << i))
2232                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
2233
2234         IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
2235                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
2236                 max_rssi, agc);
2237
2238         /* dBm = max_rssi dB - agc dB - constant.
2239          * Higher AGC (higher radio gain) means lower signal. */
2240         return max_rssi - agc - IWL_RSSI_OFFSET;
2241 }
2242
2243
2244 /* Set up 4965-specific Rx frame reply handlers */
2245 static void iwl4965_rx_handler_setup(struct iwl_priv *priv)
2246 {
2247         /* Legacy Rx frames */
2248         priv->rx_handlers[REPLY_RX] = iwl_rx_reply_rx;
2249         /* Tx response */
2250         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
2251 }
2252
2253 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
2254 {
2255         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
2256 }
2257
2258 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
2259 {
2260         cancel_work_sync(&priv->txpower_work);
2261 }
2262
2263
2264 static struct iwl_hcmd_ops iwl4965_hcmd = {
2265         .rxon_assoc = iwl4965_send_rxon_assoc,
2266 };
2267
2268 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
2269         .get_hcmd_size = iwl4965_get_hcmd_size,
2270         .build_addsta_hcmd = iwl4965_build_addsta_hcmd,
2271         .chain_noise_reset = iwl4965_chain_noise_reset,
2272         .gain_computation = iwl4965_gain_computation,
2273         .rts_tx_cmd_flag = iwl4965_rts_tx_cmd_flag,
2274         .calc_rssi = iwl4965_calc_rssi,
2275 };
2276
2277 static struct iwl_lib_ops iwl4965_lib = {
2278         .set_hw_params = iwl4965_hw_set_hw_params,
2279         .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
2280         .txq_set_sched = iwl4965_txq_set_sched,
2281         .txq_agg_enable = iwl4965_txq_agg_enable,
2282         .txq_agg_disable = iwl4965_txq_agg_disable,
2283         .rx_handler_setup = iwl4965_rx_handler_setup,
2284         .setup_deferred_work = iwl4965_setup_deferred_work,
2285         .cancel_deferred_work = iwl4965_cancel_deferred_work,
2286         .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
2287         .alive_notify = iwl4965_alive_notify,
2288         .init_alive_start = iwl4965_init_alive_start,
2289         .load_ucode = iwl4965_load_bsm,
2290         .apm_ops = {
2291                 .init = iwl4965_apm_init,
2292                 .reset = iwl4965_apm_reset,
2293                 .stop = iwl4965_apm_stop,
2294                 .config = iwl4965_nic_config,
2295                 .set_pwr_src = iwl_set_pwr_src,
2296         },
2297         .eeprom_ops = {
2298                 .regulatory_bands = {
2299                         EEPROM_REGULATORY_BAND_1_CHANNELS,
2300                         EEPROM_REGULATORY_BAND_2_CHANNELS,
2301                         EEPROM_REGULATORY_BAND_3_CHANNELS,
2302                         EEPROM_REGULATORY_BAND_4_CHANNELS,
2303                         EEPROM_REGULATORY_BAND_5_CHANNELS,
2304                         EEPROM_4965_REGULATORY_BAND_24_FAT_CHANNELS,
2305                         EEPROM_4965_REGULATORY_BAND_52_FAT_CHANNELS
2306                 },
2307                 .verify_signature  = iwlcore_eeprom_verify_signature,
2308                 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
2309                 .release_semaphore = iwlcore_eeprom_release_semaphore,
2310                 .calib_version = iwl4965_eeprom_calib_version,
2311                 .query_addr = iwlcore_eeprom_query_addr,
2312         },
2313         .send_tx_power  = iwl4965_send_tx_power,
2314         .update_chain_flags = iwl_update_chain_flags,
2315         .temperature = iwl4965_temperature_calib,
2316 };
2317
2318 static struct iwl_ops iwl4965_ops = {
2319         .lib = &iwl4965_lib,
2320         .hcmd = &iwl4965_hcmd,
2321         .utils = &iwl4965_hcmd_utils,
2322 };
2323
2324 struct iwl_cfg iwl4965_agn_cfg = {
2325         .name = "4965AGN",
2326         .fw_name = IWL4965_MODULE_FIRMWARE,
2327         .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
2328         .eeprom_size = IWL4965_EEPROM_IMG_SIZE,
2329         .eeprom_ver = EEPROM_4965_EEPROM_VERSION,
2330         .eeprom_calib_ver = EEPROM_4965_TX_POWER_VERSION,
2331         .ops = &iwl4965_ops,
2332         .mod_params = &iwl4965_mod_params,
2333 };
2334
2335 /* Module firmware */
2336 MODULE_FIRMWARE(IWL4965_MODULE_FIRMWARE);
2337
2338 module_param_named(antenna, iwl4965_mod_params.antenna, int, 0444);
2339 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
2340 module_param_named(disable, iwl4965_mod_params.disable, int, 0444);
2341 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
2342 module_param_named(swcrypto, iwl4965_mod_params.sw_crypto, int, 0444);
2343 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
2344 module_param_named(debug, iwl4965_mod_params.debug, int, 0444);
2345 MODULE_PARM_DESC(debug, "debug output mask");
2346 module_param_named(
2347         disable_hw_scan, iwl4965_mod_params.disable_hw_scan, int, 0444);
2348 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
2349
2350 module_param_named(queues_num, iwl4965_mod_params.num_of_queues, int, 0444);
2351 MODULE_PARM_DESC(queues_num, "number of hw queues.");
2352 /* QoS */
2353 module_param_named(qos_enable, iwl4965_mod_params.enable_qos, int, 0444);
2354 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
2355 /* 11n */
2356 module_param_named(11n_disable, iwl4965_mod_params.disable_11n, int, 0444);
2357 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
2358 module_param_named(amsdu_size_8K, iwl4965_mod_params.amsdu_size_8K, int, 0444);
2359 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
2360
2361 module_param_named(fw_restart4965, iwl4965_mod_params.restart_fw, int, 0444);
2362 MODULE_PARM_DESC(fw_restart4965, "restart firmware in case of error");