SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl-4965.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 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  *  Intel Linux Wireless <ilw@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 /* Highest firmware API version supported */
  52 #define IWL4965_UCODE_API_MAX 2
  53
  54 /* Lowest firmware API version supported */
  55 #define IWL4965_UCODE_API_MIN 2
  56
  57 #define IWL4965_FW_PRE "iwlwifi-4965-"
  58 #define _IWL4965_MODULE_FIRMWARE(api) IWL4965_FW_PRE #api ".ucode"
  59 #define IWL4965_MODULE_FIRMWARE(api) _IWL4965_MODULE_FIRMWARE(api)
  60
  61
  62 /* module parameters */
  63 static struct iwl_mod_params iwl4965_mod_params = {
  64         .num_of_queues = IWL49_NUM_QUEUES,
  65         .num_of_ampdu_queues = IWL49_NUM_AMPDU_QUEUES,
  66         .amsdu_size_8K = 1,
  67         .restart_fw = 1,
  68         /* the rest are 0 by default */
  69 };
  70
  71 /* check contents of special bootstrap uCode SRAM */
  72 static int iwl4965_verify_bsm(struct iwl_priv *priv)
  73 {
  74         __le32 *image = priv->ucode_boot.v_addr;
  75         u32 len = priv->ucode_boot.len;
  76         u32 reg;
  77         u32 val;
  78
  79         IWL_DEBUG_INFO(priv, "Begin verify bsm\n");
  80
  81         /* verify BSM SRAM contents */
  82         val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
  83         for (reg = BSM_SRAM_LOWER_BOUND;
  84              reg < BSM_SRAM_LOWER_BOUND + len;
  85              reg += sizeof(u32), image++) {
  86                 val = iwl_read_prph(priv, reg);
  87                 if (val != le32_to_cpu(*image)) {
  88                         IWL_ERR(priv, "BSM uCode verification failed at "
  89                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
  90                                   BSM_SRAM_LOWER_BOUND,
  91                                   reg - BSM_SRAM_LOWER_BOUND, len,
  92                                   val, le32_to_cpu(*image));
  93                         return -EIO;
  94                 }
  95         }
  96
  97         IWL_DEBUG_INFO(priv, "BSM bootstrap uCode image OK\n");
  98
  99         return 0;
 100 }
 101
 102 /**
 103  * iwl4965_load_bsm - Load bootstrap instructions
 104  *
 105  * BSM operation:
 106  *
 107  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
 108  * in special SRAM that does not power down during RFKILL.  When powering back
 109  * up after power-saving sleeps (or during initial uCode load), the BSM loads
 110  * the bootstrap program into the on-board processor, and starts it.
 111  *
 112  * The bootstrap program loads (via DMA) instructions and data for a new
 113  * program from host DRAM locations indicated by the host driver in the
 114  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
 115  * automatically.
 116  *
 117  * When initializing the NIC, the host driver points the BSM to the
 118  * "initialize" uCode image.  This uCode sets up some internal data, then
 119  * notifies host via "initialize alive" that it is complete.
 120  *
 121  * The host then replaces the BSM_DRAM_* pointer values to point to the
 122  * normal runtime uCode instructions and a backup uCode data cache buffer
 123  * (filled initially with starting data values for the on-board processor),
 124  * then triggers the "initialize" uCode to load and launch the runtime uCode,
 125  * which begins normal operation.
 126  *
 127  * When doing a power-save shutdown, runtime uCode saves data SRAM into
 128  * the backup data cache in DRAM before SRAM is powered down.
 129  *
 130  * When powering back up, the BSM loads the bootstrap program.  This reloads
 131  * the runtime uCode instructions and the backup data cache into SRAM,
 132  * and re-launches the runtime uCode from where it left off.
 133  */
 134 static int iwl4965_load_bsm(struct iwl_priv *priv)
 135 {
 136         __le32 *image = priv->ucode_boot.v_addr;
 137         u32 len = priv->ucode_boot.len;
 138         dma_addr_t pinst;
 139         dma_addr_t pdata;
 140         u32 inst_len;
 141         u32 data_len;
 142         int i;
 143         u32 done;
 144         u32 reg_offset;
 145         int ret;
 146
 147         IWL_DEBUG_INFO(priv, "Begin load bsm\n");
 148
 149         priv->ucode_type = UCODE_RT;
 150
 151         /* make sure bootstrap program is no larger than BSM's SRAM size */
 152         if (len > IWL49_MAX_BSM_SIZE)
 153                 return -EINVAL;
 154
 155         /* Tell bootstrap uCode where to find the "Initialize" uCode
 156          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
 157          * NOTE:  iwl_init_alive_start() will replace these values,
 158          *        after the "initialize" uCode has run, to point to
 159          *        runtime/protocol instructions and backup data cache.
 160          */
 161         pinst = priv->ucode_init.p_addr >> 4;
 162         pdata = priv->ucode_init_data.p_addr >> 4;
 163         inst_len = priv->ucode_init.len;
 164         data_len = priv->ucode_init_data.len;
 165
 166         ret = iwl_grab_nic_access(priv);
 167         if (ret)
 168                 return ret;
 169
 170         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 171         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 172         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
 173         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
 174
 175         /* Fill BSM memory with bootstrap instructions */
 176         for (reg_offset = BSM_SRAM_LOWER_BOUND;
 177              reg_offset < BSM_SRAM_LOWER_BOUND + len;
 178              reg_offset += sizeof(u32), image++)
 179                 _iwl_write_prph(priv, reg_offset, le32_to_cpu(*image));
 180
 181         ret = iwl4965_verify_bsm(priv);
 182         if (ret) {
 183                 iwl_release_nic_access(priv);
 184                 return ret;
 185         }
 186
 187         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
 188         iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
 189         iwl_write_prph(priv, BSM_WR_MEM_DST_REG, IWL49_RTC_INST_LOWER_BOUND);
 190         iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
 191
 192         /* Load bootstrap code into instruction SRAM now,
 193          *   to prepare to load "initialize" uCode */
 194         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);
 195
 196         /* Wait for load of bootstrap uCode to finish */
 197         for (i = 0; i < 100; i++) {
 198                 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
 199                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
 200                         break;
 201                 udelay(10);
 202         }
 203         if (i < 100)
 204                 IWL_DEBUG_INFO(priv, "BSM write complete, poll %d iterations\n", i);
 205         else {
 206                 IWL_ERR(priv, "BSM write did not complete!\n");
 207                 return -EIO;
 208         }
 209
 210         /* Enable future boot loads whenever power management unit triggers it
 211          *   (e.g. when powering back up after power-save shutdown) */
 212         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
 213
 214         iwl_release_nic_access(priv);
 215
 216         return 0;
 217 }
 218
 219 /**
 220  * iwl4965_set_ucode_ptrs - Set uCode address location
 221  *
 222  * Tell initialization uCode where to find runtime uCode.
 223  *
 224  * BSM registers initially contain pointers to initialization uCode.
 225  * We need to replace them to load runtime uCode inst and data,
 226  * and to save runtime data when powering down.
 227  */
 228 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
 229 {
 230         dma_addr_t pinst;
 231         dma_addr_t pdata;
 232         unsigned long flags;
 233         int ret = 0;
 234
 235         /* bits 35:4 for 4965 */
 236         pinst = priv->ucode_code.p_addr >> 4;
 237         pdata = priv->ucode_data_backup.p_addr >> 4;
 238
 239         spin_lock_irqsave(&priv->lock, flags);
 240         ret = iwl_grab_nic_access(priv);
 241         if (ret) {
 242                 spin_unlock_irqrestore(&priv->lock, flags);
 243                 return ret;
 244         }
 245
 246         /* Tell bootstrap uCode where to find image to load */
 247         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 248         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 249         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
 250                                  priv->ucode_data.len);
 251
 252         /* Inst byte count must be last to set up, bit 31 signals uCode
 253          *   that all new ptr/size info is in place */
 254         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
 255                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
 256         iwl_release_nic_access(priv);
 257
 258         spin_unlock_irqrestore(&priv->lock, flags);
 259
 260         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
 261
 262         return ret;
 263 }
 264
 265 /**
 266  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
 267  *
 268  * Called after REPLY_ALIVE notification received from "initialize" uCode.
 269  *
 270  * The 4965 "initialize" ALIVE reply contains calibration data for:
 271  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
 272  *   (3945 does not contain this data).
 273  *
 274  * Tell "initialize" uCode to go ahead and load the runtime uCode.
 275 */
 276 static void iwl4965_init_alive_start(struct iwl_priv *priv)
 277 {
 278         /* Check alive response for "valid" sign from uCode */
 279         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
 280                 /* We had an error bringing up the hardware, so take it
 281                  * all the way back down so we can try again */
 282                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
 283                 goto restart;
 284         }
 285
 286         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
 287          * This is a paranoid check, because we would not have gotten the
 288          * "initialize" alive if code weren't properly loaded.  */
 289         if (iwl_verify_ucode(priv)) {
 290                 /* Runtime instruction load was bad;
 291                  * take it all the way back down so we can try again */
 292                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
 293                 goto restart;
 294         }
 295
 296         /* Calculate temperature */
 297         priv->temperature = iwl4965_hw_get_temperature(priv);
 298
 299         /* Send pointers to protocol/runtime uCode image ... init code will
 300          * load and launch runtime uCode, which will send us another "Alive"
 301          * notification. */
 302         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 303         if (iwl4965_set_ucode_ptrs(priv)) {
 304                 /* Runtime instruction load won't happen;
 305                  * take it all the way back down so we can try again */
 306                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
 307                 goto restart;
 308         }
 309         return;
 310
 311 restart:
 312         queue_work(priv->workqueue, &priv->restart);
 313 }
 314
 315 static int is_fat_channel(__le32 rxon_flags)
 316 {
 317         return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
 318                 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
 319 }
 320
 321 /*
 322  * EEPROM handlers
 323  */
 324 static u16 iwl4965_eeprom_calib_version(struct iwl_priv *priv)
 325 {
 326         return iwl_eeprom_query16(priv, EEPROM_4965_CALIB_VERSION_OFFSET);
 327 }
 328
 329 /*
 330  * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask
 331  * must be called under priv->lock and mac access
 332  */
 333 static void iwl4965_txq_set_sched(struct iwl_priv *priv, u32 mask)
 334 {
 335         iwl_write_prph(priv, IWL49_SCD_TXFACT, mask);
 336 }
 337
 338 static int iwl4965_apm_init(struct iwl_priv *priv)
 339 {
 340         int ret = 0;
 341
 342         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 343                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 344
 345         /* disable L0s without affecting L1 :don't wait for ICH L0s bug W/A) */
 346         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 347                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
 348
 349         /* set "initialization complete" bit to move adapter
 350          * D0U* --> D0A* state */
 351         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 352
 353         /* wait for clock stabilization */
 354         ret = iwl_poll_direct_bit(priv, CSR_GP_CNTRL,
 355                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 356         if (ret < 0) {
 357                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
 358                 goto out;
 359         }
 360
 361         ret = iwl_grab_nic_access(priv);
 362         if (ret)
 363                 goto out;
 364
 365         /* enable DMA */
 366         iwl_write_prph(priv, APMG_CLK_CTRL_REG, APMG_CLK_VAL_DMA_CLK_RQT |
 367                                                 APMG_CLK_VAL_BSM_CLK_RQT);
 368
 369         udelay(20);
 370
 371         /* disable L1-Active */
 372         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 373                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 374
 375         iwl_release_nic_access(priv);
 376 out:
 377         return ret;
 378 }
 379
 380
 381 static void iwl4965_nic_config(struct iwl_priv *priv)
 382 {
 383         unsigned long flags;
 384         u16 radio_cfg;
 385         u16 lctl;
 386
 387         spin_lock_irqsave(&priv->lock, flags);
 388
 389         lctl = iwl_pcie_link_ctl(priv);
 390
 391         /* HW bug W/A - negligible power consumption */
 392         /* L1-ASPM is enabled by BIOS */
 393         if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) == PCI_CFG_LINK_CTRL_VAL_L1_EN)
 394                 /* L1-ASPM enabled: disable L0S  */
 395                 iwl_set_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 396         else
 397                 /* L1-ASPM disabled: enable L0S */
 398                 iwl_clear_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 399
 400         radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
 401
 402         /* write radio config values to register */
 403         if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) == EEPROM_4965_RF_CFG_TYPE_MAX)
 404                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 405                             EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
 406                             EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
 407                             EEPROM_RF_CFG_DASH_MSK(radio_cfg));
 408
 409         /* set CSR_HW_CONFIG_REG for uCode use */
 410         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 411                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 412                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
 413
 414         priv->calib_info = (struct iwl_eeprom_calib_info *)
 415                 iwl_eeprom_query_addr(priv, EEPROM_4965_CALIB_TXPOWER_OFFSET);
 416
 417         spin_unlock_irqrestore(&priv->lock, flags);
 418 }
 419
 420 static int iwl4965_apm_stop_master(struct iwl_priv *priv)
 421 {
 422         unsigned long flags;
 423
 424         spin_lock_irqsave(&priv->lock, flags);
 425
 426         /* set stop master bit */
 427         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 428
 429         iwl_poll_direct_bit(priv, CSR_RESET,
 430                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 431
 432         spin_unlock_irqrestore(&priv->lock, flags);
 433         IWL_DEBUG_INFO(priv, "stop master\n");
 434
 435         return 0;
 436 }
 437
 438 static void iwl4965_apm_stop(struct iwl_priv *priv)
 439 {
 440         unsigned long flags;
 441
 442         iwl4965_apm_stop_master(priv);
 443
 444         spin_lock_irqsave(&priv->lock, flags);
 445
 446         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 447
 448         udelay(10);
 449         /* clear "init complete"  move adapter D0A* --> D0U state */
 450         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 451         spin_unlock_irqrestore(&priv->lock, flags);
 452 }
 453
 454 static int iwl4965_apm_reset(struct iwl_priv *priv)
 455 {
 456         int ret = 0;
 457         unsigned long flags;
 458
 459         iwl4965_apm_stop_master(priv);
 460
 461         spin_lock_irqsave(&priv->lock, flags);
 462
 463         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 464
 465         udelay(10);
 466
 467         /* FIXME: put here L1A -L0S w/a */
 468
 469         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 470
 471         ret = iwl_poll_direct_bit(priv, CSR_GP_CNTRL,
 472                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 473         if (ret < 0)
 474                 goto out;
 475
 476         udelay(10);
 477
 478         ret = iwl_grab_nic_access(priv);
 479         if (ret)
 480                 goto out;
 481         /* Enable DMA and BSM Clock */
 482         iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT |
 483                                               APMG_CLK_VAL_BSM_CLK_RQT);
 484
 485         udelay(10);
 486
 487         /* disable L1A */
 488         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 489                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 490
 491         iwl_release_nic_access(priv);
 492
 493         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 494         wake_up_interruptible(&priv->wait_command_queue);
 495
 496 out:
 497         spin_unlock_irqrestore(&priv->lock, flags);
 498
 499         return ret;
 500 }
 501
 502 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
 503  * Called after every association, but this runs only once!
 504  *  ... once chain noise is calibrated the first time, it's good forever.  */
 505 static void iwl4965_chain_noise_reset(struct iwl_priv *priv)
 506 {
 507         struct iwl_chain_noise_data *data = &(priv->chain_noise_data);
 508
 509         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
 510                 struct iwl_calib_diff_gain_cmd cmd;
 511
 512                 memset(&cmd, 0, sizeof(cmd));
 513                 cmd.hdr.op_code = IWL_PHY_CALIBRATE_DIFF_GAIN_CMD;
 514                 cmd.diff_gain_a = 0;
 515                 cmd.diff_gain_b = 0;
 516                 cmd.diff_gain_c = 0;
 517                 if (iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 518                                  sizeof(cmd), &cmd))
 519                         IWL_ERR(priv,
 520                                 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
 521                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
 522                 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
 523         }
 524 }
 525
 526 static void iwl4965_gain_computation(struct iwl_priv *priv,
 527                 u32 *average_noise,
 528                 u16 min_average_noise_antenna_i,
 529                 u32 min_average_noise)
 530 {
 531         int i, ret;
 532         struct iwl_chain_noise_data *data = &priv->chain_noise_data;
 533
 534         data->delta_gain_code[min_average_noise_antenna_i] = 0;
 535
 536         for (i = 0; i < NUM_RX_CHAINS; i++) {
 537                 s32 delta_g = 0;
 538
 539                 if (!(data->disconn_array[i]) &&
 540                     (data->delta_gain_code[i] ==
 541                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
 542                         delta_g = average_noise[i] - min_average_noise;
 543                         data->delta_gain_code[i] = (u8)((delta_g * 10) / 15);
 544                         data->delta_gain_code[i] =
 545                                 min(data->delta_gain_code[i],
 546                                 (u8) CHAIN_NOISE_MAX_DELTA_GAIN_CODE);
 547
 548                         data->delta_gain_code[i] =
 549                                 (data->delta_gain_code[i] | (1 << 2));
 550                 } else {
 551                         data->delta_gain_code[i] = 0;
 552                 }
 553         }
 554         IWL_DEBUG_CALIB(priv, "delta_gain_codes: a %d b %d c %d\n",
 555                      data->delta_gain_code[0],
 556                      data->delta_gain_code[1],
 557                      data->delta_gain_code[2]);
 558
 559         /* Differential gain gets sent to uCode only once */
 560         if (!data->radio_write) {
 561                 struct iwl_calib_diff_gain_cmd cmd;
 562                 data->radio_write = 1;
 563
 564                 memset(&cmd, 0, sizeof(cmd));
 565                 cmd.hdr.op_code = IWL_PHY_CALIBRATE_DIFF_GAIN_CMD;
 566                 cmd.diff_gain_a = data->delta_gain_code[0];
 567                 cmd.diff_gain_b = data->delta_gain_code[1];
 568                 cmd.diff_gain_c = data->delta_gain_code[2];
 569                 ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 570                                       sizeof(cmd), &cmd);
 571                 if (ret)
 572                         IWL_DEBUG_CALIB(priv, "fail sending cmd "
 573                                      "REPLY_PHY_CALIBRATION_CMD \n");
 574
 575                 /* TODO we might want recalculate
 576                  * rx_chain in rxon cmd */
 577
 578                 /* Mark so we run this algo only once! */
 579                 data->state = IWL_CHAIN_NOISE_CALIBRATED;
 580         }
 581         data->chain_noise_a = 0;
 582         data->chain_noise_b = 0;
 583         data->chain_noise_c = 0;
 584         data->chain_signal_a = 0;
 585         data->chain_signal_b = 0;
 586         data->chain_signal_c = 0;
 587         data->beacon_count = 0;
 588 }
 589
 590 static void iwl4965_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 591                         __le32 *tx_flags)
 592 {
 593         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 594                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 595                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 596         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 597                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 598                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 599         }
 600 }
 601
 602 static void iwl4965_bg_txpower_work(struct work_struct *work)
 603 {
 604         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 605                         txpower_work);
 606
 607         /* If a scan happened to start before we got here
 608          * then just return; the statistics notification will
 609          * kick off another scheduled work to compensate for
 610          * any temperature delta we missed here. */
 611         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 612             test_bit(STATUS_SCANNING, &priv->status))
 613                 return;
 614
 615         mutex_lock(&priv->mutex);
 616
 617         /* Regardless of if we are associated, we must reconfigure the
 618          * TX power since frames can be sent on non-radar channels while
 619          * not associated */
 620         iwl4965_send_tx_power(priv);
 621
 622         /* Update last_temperature to keep is_calib_needed from running
 623          * when it isn't needed... */
 624         priv->last_temperature = priv->temperature;
 625
 626         mutex_unlock(&priv->mutex);
 627 }
 628
 629 /*
 630  * Acquire priv->lock before calling this function !
 631  */
 632 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
 633 {
 634         iwl_write_direct32(priv, HBUS_TARG_WRPTR,
 635                              (index & 0xff) | (txq_id << 8));
 636         iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(txq_id), index);
 637 }
 638
 639 /**
 640  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
 641  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
 642  * @scd_retry: (1) Indicates queue will be used in aggregation mode
 643  *
 644  * NOTE:  Acquire priv->lock before calling this function !
 645  */
 646 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
 647                                         struct iwl_tx_queue *txq,
 648                                         int tx_fifo_id, int scd_retry)
 649 {
 650         int txq_id = txq->q.id;
 651
 652         /* Find out whether to activate Tx queue */
 653         int active = test_bit(txq_id, &priv->txq_ctx_active_msk) ? 1 : 0;
 654
 655         /* Set up and activate */
 656         iwl_write_prph(priv, IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
 657                          (active << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
 658                          (tx_fifo_id << IWL49_SCD_QUEUE_STTS_REG_POS_TXF) |
 659                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_WSL) |
 660                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
 661                          IWL49_SCD_QUEUE_STTS_REG_MSK);
 662
 663         txq->sched_retry = scd_retry;
 664
 665         IWL_DEBUG_INFO(priv, "%s %s Queue %d on AC %d\n",
 666                        active ? "Activate" : "Deactivate",
 667                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
 668 }
 669
 670 static const u16 default_queue_to_tx_fifo[] = {
 671         IWL_TX_FIFO_AC3,
 672         IWL_TX_FIFO_AC2,
 673         IWL_TX_FIFO_AC1,
 674         IWL_TX_FIFO_AC0,
 675         IWL49_CMD_FIFO_NUM,
 676         IWL_TX_FIFO_HCCA_1,
 677         IWL_TX_FIFO_HCCA_2
 678 };
 679
 680 static int iwl4965_alive_notify(struct iwl_priv *priv)
 681 {
 682         u32 a;
 683         unsigned long flags;
 684         int ret;
 685         int i, chan;
 686         u32 reg_val;
 687
 688         spin_lock_irqsave(&priv->lock, flags);
 689
 690         ret = iwl_grab_nic_access(priv);
 691         if (ret) {
 692                 spin_unlock_irqrestore(&priv->lock, flags);
 693                 return ret;
 694         }
 695
 696         /* Clear 4965's internal Tx Scheduler data base */
 697         priv->scd_base_addr = iwl_read_prph(priv, IWL49_SCD_SRAM_BASE_ADDR);
 698         a = priv->scd_base_addr + IWL49_SCD_CONTEXT_DATA_OFFSET;
 699         for (; a < priv->scd_base_addr + IWL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
 700                 iwl_write_targ_mem(priv, a, 0);
 701         for (; a < priv->scd_base_addr + IWL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
 702                 iwl_write_targ_mem(priv, a, 0);
 703         for (; a < sizeof(u16) * priv->hw_params.max_txq_num; a += 4)
 704                 iwl_write_targ_mem(priv, a, 0);
 705
 706         /* Tel 4965 where to find Tx byte count tables */
 707         iwl_write_prph(priv, IWL49_SCD_DRAM_BASE_ADDR,
 708                         priv->scd_bc_tbls.dma >> 10);
 709
 710         /* Enable DMA channel */
 711         for (chan = 0; chan < FH49_TCSR_CHNL_NUM ; chan++)
 712                 iwl_write_direct32(priv, FH_TCSR_CHNL_TX_CONFIG_REG(chan),
 713                                 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
 714                                 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE);
 715
 716         /* Update FH chicken bits */
 717         reg_val = iwl_read_direct32(priv, FH_TX_CHICKEN_BITS_REG);
 718         iwl_write_direct32(priv, FH_TX_CHICKEN_BITS_REG,
 719                            reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN);
 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, 6));
 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 static void iwl4965_set_ct_threshold(struct iwl_priv *priv)
 792 {
 793         /* want Kelvin */
 794         priv->hw_params.ct_kill_threshold = CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD);
 795 }
 796
 797 /**
 798  * iwl4965_hw_set_hw_params
 799  *
 800  * Called when initializing driver
 801  */
 802 static int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
 803 {
 804
 805         if ((priv->cfg->mod_params->num_of_queues > IWL49_NUM_QUEUES) ||
 806             (priv->cfg->mod_params->num_of_queues < IWL_MIN_NUM_QUEUES)) {
 807                 IWL_ERR(priv,
 808                         "invalid queues_num, should be between %d and %d\n",
 809                         IWL_MIN_NUM_QUEUES, IWL49_NUM_QUEUES);
 810                 return -EINVAL;
 811         }
 812
 813         priv->hw_params.max_txq_num = priv->cfg->mod_params->num_of_queues;
 814         priv->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM;
 815         priv->hw_params.scd_bc_tbls_size =
 816                         IWL49_NUM_QUEUES * sizeof(struct iwl4965_scd_bc_tbl);
 817         priv->hw_params.tfd_size = sizeof(struct iwl_tfd);
 818         priv->hw_params.max_stations = IWL4965_STATION_COUNT;
 819         priv->hw_params.bcast_sta_id = IWL4965_BROADCAST_ID;
 820         priv->hw_params.max_data_size = IWL49_RTC_DATA_SIZE;
 821         priv->hw_params.max_inst_size = IWL49_RTC_INST_SIZE;
 822         priv->hw_params.max_bsm_size = BSM_SRAM_SIZE;
 823         priv->hw_params.fat_channel = BIT(IEEE80211_BAND_5GHZ);
 824
 825         priv->hw_params.rx_wrt_ptr_reg = FH_RSCSR_CHNL0_WPTR;
 826
 827         priv->hw_params.tx_chains_num = 2;
 828         priv->hw_params.rx_chains_num = 2;
 829         priv->hw_params.valid_tx_ant = ANT_A | ANT_B;
 830         priv->hw_params.valid_rx_ant = ANT_A | ANT_B;
 831         if (priv->cfg->ops->lib->temp_ops.set_ct_kill)
 832                 priv->cfg->ops->lib->temp_ops.set_ct_kill(priv);
 833
 834         priv->hw_params.sens = &iwl4965_sensitivity;
 835
 836         return 0;
 837 }
 838
 839 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
 840 {
 841         s32 sign = 1;
 842
 843         if (num < 0) {
 844                 sign = -sign;
 845                 num = -num;
 846         }
 847         if (denom < 0) {
 848                 sign = -sign;
 849                 denom = -denom;
 850         }
 851         *res = 1;
 852         *res = ((num * 2 + denom) / (denom * 2)) * sign;
 853
 854         return 1;
 855 }
 856
 857 /**
 858  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
 859  *
 860  * Determines power supply voltage compensation for txpower calculations.
 861  * Returns number of 1/2-dB steps to subtract from gain table index,
 862  * to compensate for difference between power supply voltage during
 863  * factory measurements, vs. current power supply voltage.
 864  *
 865  * Voltage indication is higher for lower voltage.
 866  * Lower voltage requires more gain (lower gain table index).
 867  */
 868 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
 869                                             s32 current_voltage)
 870 {
 871         s32 comp = 0;
 872
 873         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
 874             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
 875                 return 0;
 876
 877         iwl4965_math_div_round(current_voltage - eeprom_voltage,
 878                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
 879
 880         if (current_voltage > eeprom_voltage)
 881                 comp *= 2;
 882         if ((comp < -2) || (comp > 2))
 883                 comp = 0;
 884
 885         return comp;
 886 }
 887
 888 static s32 iwl4965_get_tx_atten_grp(u16 channel)
 889 {
 890         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
 891             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
 892                 return CALIB_CH_GROUP_5;
 893
 894         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
 895             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
 896                 return CALIB_CH_GROUP_1;
 897
 898         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
 899             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
 900                 return CALIB_CH_GROUP_2;
 901
 902         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
 903             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
 904                 return CALIB_CH_GROUP_3;
 905
 906         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
 907             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
 908                 return CALIB_CH_GROUP_4;
 909
 910         return -1;
 911 }
 912
 913 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
 914 {
 915         s32 b = -1;
 916
 917         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
 918                 if (priv->calib_info->band_info[b].ch_from == 0)
 919                         continue;
 920
 921                 if ((channel >= priv->calib_info->band_info[b].ch_from)
 922                     && (channel <= priv->calib_info->band_info[b].ch_to))
 923                         break;
 924         }
 925
 926         return b;
 927 }
 928
 929 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
 930 {
 931         s32 val;
 932
 933         if (x2 == x1)
 934                 return y1;
 935         else {
 936                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
 937                 return val + y2;
 938         }
 939 }
 940
 941 /**
 942  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
 943  *
 944  * Interpolates factory measurements from the two sample channels within a
 945  * sub-band, to apply to channel of interest.  Interpolation is proportional to
 946  * differences in channel frequencies, which is proportional to differences
 947  * in channel number.
 948  */
 949 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
 950                                     struct iwl_eeprom_calib_ch_info *chan_info)
 951 {
 952         s32 s = -1;
 953         u32 c;
 954         u32 m;
 955         const struct iwl_eeprom_calib_measure *m1;
 956         const struct iwl_eeprom_calib_measure *m2;
 957         struct iwl_eeprom_calib_measure *omeas;
 958         u32 ch_i1;
 959         u32 ch_i2;
 960
 961         s = iwl4965_get_sub_band(priv, channel);
 962         if (s >= EEPROM_TX_POWER_BANDS) {
 963                 IWL_ERR(priv, "Tx Power can not find channel %d\n", channel);
 964                 return -1;
 965         }
 966
 967         ch_i1 = priv->calib_info->band_info[s].ch1.ch_num;
 968         ch_i2 = priv->calib_info->band_info[s].ch2.ch_num;
 969         chan_info->ch_num = (u8) channel;
 970
 971         IWL_DEBUG_TXPOWER(priv, "channel %d subband %d factory cal ch %d & %d\n",
 972                           channel, s, ch_i1, ch_i2);
 973
 974         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
 975                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
 976                         m1 = &(priv->calib_info->band_info[s].ch1.
 977                                measurements[c][m]);
 978                         m2 = &(priv->calib_info->band_info[s].ch2.
 979                                measurements[c][m]);
 980                         omeas = &(chan_info->measurements[c][m]);
 981
 982                         omeas->actual_pow =
 983                             (u8) iwl4965_interpolate_value(channel, ch_i1,
 984                                                            m1->actual_pow,
 985                                                            ch_i2,
 986                                                            m2->actual_pow);
 987                         omeas->gain_idx =
 988                             (u8) iwl4965_interpolate_value(channel, ch_i1,
 989                                                            m1->gain_idx, ch_i2,
 990                                                            m2->gain_idx);
 991                         omeas->temperature =
 992                             (u8) iwl4965_interpolate_value(channel, ch_i1,
 993                                                            m1->temperature,
 994                                                            ch_i2,
 995                                                            m2->temperature);
 996                         omeas->pa_det =
 997                             (s8) iwl4965_interpolate_value(channel, ch_i1,
 998                                                            m1->pa_det, ch_i2,
 999                                                            m2->pa_det);
1000
1001                         IWL_DEBUG_TXPOWER(priv,
1002                                 "chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
1003                                 m1->actual_pow, m2->actual_pow, omeas->actual_pow);
1004                         IWL_DEBUG_TXPOWER(priv,
1005                                 "chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
1006                                 m1->gain_idx, m2->gain_idx, omeas->gain_idx);
1007                         IWL_DEBUG_TXPOWER(priv,
1008                                 "chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
1009                                 m1->pa_det, m2->pa_det, omeas->pa_det);
1010                         IWL_DEBUG_TXPOWER(priv,
1011                                 "chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
1012                                 m1->temperature, m2->temperature,
1013                                 omeas->temperature);
1014                 }
1015         }
1016
1017         return 0;
1018 }
1019
1020 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
1021  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
1022 static s32 back_off_table[] = {
1023         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
1024         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
1025         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
1026         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
1027         10                      /* CCK */
1028 };
1029
1030 /* Thermal compensation values for txpower for various frequency ranges ...
1031  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
1032 static struct iwl4965_txpower_comp_entry {
1033         s32 degrees_per_05db_a;
1034         s32 degrees_per_05db_a_denom;
1035 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
1036         {9, 2},                 /* group 0 5.2, ch  34-43 */
1037         {4, 1},                 /* group 1 5.2, ch  44-70 */
1038         {4, 1},                 /* group 2 5.2, ch  71-124 */
1039         {4, 1},                 /* group 3 5.2, ch 125-200 */
1040         {3, 1}                  /* group 4 2.4, ch   all */
1041 };
1042
1043 static s32 get_min_power_index(s32 rate_power_index, u32 band)
1044 {
1045         if (!band) {
1046                 if ((rate_power_index & 7) <= 4)
1047                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
1048         }
1049         return MIN_TX_GAIN_INDEX;
1050 }
1051
1052 struct gain_entry {
1053         u8 dsp;
1054         u8 radio;
1055 };
1056
1057 static const struct gain_entry gain_table[2][108] = {
1058         /* 5.2GHz power gain index table */
1059         {
1060          {123, 0x3F},           /* highest txpower */
1061          {117, 0x3F},
1062          {110, 0x3F},
1063          {104, 0x3F},
1064          {98, 0x3F},
1065          {110, 0x3E},
1066          {104, 0x3E},
1067          {98, 0x3E},
1068          {110, 0x3D},
1069          {104, 0x3D},
1070          {98, 0x3D},
1071          {110, 0x3C},
1072          {104, 0x3C},
1073          {98, 0x3C},
1074          {110, 0x3B},
1075          {104, 0x3B},
1076          {98, 0x3B},
1077          {110, 0x3A},
1078          {104, 0x3A},
1079          {98, 0x3A},
1080          {110, 0x39},
1081          {104, 0x39},
1082          {98, 0x39},
1083          {110, 0x38},
1084          {104, 0x38},
1085          {98, 0x38},
1086          {110, 0x37},
1087          {104, 0x37},
1088          {98, 0x37},
1089          {110, 0x36},
1090          {104, 0x36},
1091          {98, 0x36},
1092          {110, 0x35},
1093          {104, 0x35},
1094          {98, 0x35},
1095          {110, 0x34},
1096          {104, 0x34},
1097          {98, 0x34},
1098          {110, 0x33},
1099          {104, 0x33},
1100          {98, 0x33},
1101          {110, 0x32},
1102          {104, 0x32},
1103          {98, 0x32},
1104          {110, 0x31},
1105          {104, 0x31},
1106          {98, 0x31},
1107          {110, 0x30},
1108          {104, 0x30},
1109          {98, 0x30},
1110          {110, 0x25},
1111          {104, 0x25},
1112          {98, 0x25},
1113          {110, 0x24},
1114          {104, 0x24},
1115          {98, 0x24},
1116          {110, 0x23},
1117          {104, 0x23},
1118          {98, 0x23},
1119          {110, 0x22},
1120          {104, 0x18},
1121          {98, 0x18},
1122          {110, 0x17},
1123          {104, 0x17},
1124          {98, 0x17},
1125          {110, 0x16},
1126          {104, 0x16},
1127          {98, 0x16},
1128          {110, 0x15},
1129          {104, 0x15},
1130          {98, 0x15},
1131          {110, 0x14},
1132          {104, 0x14},
1133          {98, 0x14},
1134          {110, 0x13},
1135          {104, 0x13},
1136          {98, 0x13},
1137          {110, 0x12},
1138          {104, 0x08},
1139          {98, 0x08},
1140          {110, 0x07},
1141          {104, 0x07},
1142          {98, 0x07},
1143          {110, 0x06},
1144          {104, 0x06},
1145          {98, 0x06},
1146          {110, 0x05},
1147          {104, 0x05},
1148          {98, 0x05},
1149          {110, 0x04},
1150          {104, 0x04},
1151          {98, 0x04},
1152          {110, 0x03},
1153          {104, 0x03},
1154          {98, 0x03},
1155          {110, 0x02},
1156          {104, 0x02},
1157          {98, 0x02},
1158          {110, 0x01},
1159          {104, 0x01},
1160          {98, 0x01},
1161          {110, 0x00},
1162          {104, 0x00},
1163          {98, 0x00},
1164          {93, 0x00},
1165          {88, 0x00},
1166          {83, 0x00},
1167          {78, 0x00},
1168          },
1169         /* 2.4GHz power gain index table */
1170         {
1171          {110, 0x3f},           /* highest txpower */
1172          {104, 0x3f},
1173          {98, 0x3f},
1174          {110, 0x3e},
1175          {104, 0x3e},
1176          {98, 0x3e},
1177          {110, 0x3d},
1178          {104, 0x3d},
1179          {98, 0x3d},
1180          {110, 0x3c},
1181          {104, 0x3c},
1182          {98, 0x3c},
1183          {110, 0x3b},
1184          {104, 0x3b},
1185          {98, 0x3b},
1186          {110, 0x3a},
1187          {104, 0x3a},
1188          {98, 0x3a},
1189          {110, 0x39},
1190          {104, 0x39},
1191          {98, 0x39},
1192          {110, 0x38},
1193          {104, 0x38},
1194          {98, 0x38},
1195          {110, 0x37},
1196          {104, 0x37},
1197          {98, 0x37},
1198          {110, 0x36},
1199          {104, 0x36},
1200          {98, 0x36},
1201          {110, 0x35},
1202          {104, 0x35},
1203          {98, 0x35},
1204          {110, 0x34},
1205          {104, 0x34},
1206          {98, 0x34},
1207          {110, 0x33},
1208          {104, 0x33},
1209          {98, 0x33},
1210          {110, 0x32},
1211          {104, 0x32},
1212          {98, 0x32},
1213          {110, 0x31},
1214          {104, 0x31},
1215          {98, 0x31},
1216          {110, 0x30},
1217          {104, 0x30},
1218          {98, 0x30},
1219          {110, 0x6},
1220          {104, 0x6},
1221          {98, 0x6},
1222          {110, 0x5},
1223          {104, 0x5},
1224          {98, 0x5},
1225          {110, 0x4},
1226          {104, 0x4},
1227          {98, 0x4},
1228          {110, 0x3},
1229          {104, 0x3},
1230          {98, 0x3},
1231          {110, 0x2},
1232          {104, 0x2},
1233          {98, 0x2},
1234          {110, 0x1},
1235          {104, 0x1},
1236          {98, 0x1},
1237          {110, 0x0},
1238          {104, 0x0},
1239          {98, 0x0},
1240          {97, 0},
1241          {96, 0},
1242          {95, 0},
1243          {94, 0},
1244          {93, 0},
1245          {92, 0},
1246          {91, 0},
1247          {90, 0},
1248          {89, 0},
1249          {88, 0},
1250          {87, 0},
1251          {86, 0},
1252          {85, 0},
1253          {84, 0},
1254          {83, 0},
1255          {82, 0},
1256          {81, 0},
1257          {80, 0},
1258          {79, 0},
1259          {78, 0},
1260          {77, 0},
1261          {76, 0},
1262          {75, 0},
1263          {74, 0},
1264          {73, 0},
1265          {72, 0},
1266          {71, 0},
1267          {70, 0},
1268          {69, 0},
1269          {68, 0},
1270          {67, 0},
1271          {66, 0},
1272          {65, 0},
1273          {64, 0},
1274          {63, 0},
1275          {62, 0},
1276          {61, 0},
1277          {60, 0},
1278          {59, 0},
1279          }
1280 };
1281
1282 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
1283                                     u8 is_fat, u8 ctrl_chan_high,
1284                                     struct iwl4965_tx_power_db *tx_power_tbl)
1285 {
1286         u8 saturation_power;
1287         s32 target_power;
1288         s32 user_target_power;
1289         s32 power_limit;
1290         s32 current_temp;
1291         s32 reg_limit;
1292         s32 current_regulatory;
1293         s32 txatten_grp = CALIB_CH_GROUP_MAX;
1294         int i;
1295         int c;
1296         const struct iwl_channel_info *ch_info = NULL;
1297         struct iwl_eeprom_calib_ch_info ch_eeprom_info;
1298         const struct iwl_eeprom_calib_measure *measurement;
1299         s16 voltage;
1300         s32 init_voltage;
1301         s32 voltage_compensation;
1302         s32 degrees_per_05db_num;
1303         s32 degrees_per_05db_denom;
1304         s32 factory_temp;
1305         s32 temperature_comp[2];
1306         s32 factory_gain_index[2];
1307         s32 factory_actual_pwr[2];
1308         s32 power_index;
1309
1310         /* tx_power_user_lmt is in dBm, convert to half-dBm (half-dB units
1311          *   are used for indexing into txpower table) */
1312         user_target_power = 2 * priv->tx_power_user_lmt;
1313
1314         /* Get current (RXON) channel, band, width */
1315         IWL_DEBUG_TXPOWER(priv, "chan %d band %d is_fat %d\n", channel, band,
1316                           is_fat);
1317
1318         ch_info = iwl_get_channel_info(priv, priv->band, channel);
1319
1320         if (!is_channel_valid(ch_info))
1321                 return -EINVAL;
1322
1323         /* get txatten group, used to select 1) thermal txpower adjustment
1324          *   and 2) mimo txpower balance between Tx chains. */
1325         txatten_grp = iwl4965_get_tx_atten_grp(channel);
1326         if (txatten_grp < 0) {
1327                 IWL_ERR(priv, "Can't find txatten group for channel %d.\n",
1328                           channel);
1329                 return -EINVAL;
1330         }
1331
1332         IWL_DEBUG_TXPOWER(priv, "channel %d belongs to txatten group %d\n",
1333                           channel, txatten_grp);
1334
1335         if (is_fat) {
1336                 if (ctrl_chan_high)
1337                         channel -= 2;
1338                 else
1339                         channel += 2;
1340         }
1341
1342         /* hardware txpower limits ...
1343          * saturation (clipping distortion) txpowers are in half-dBm */
1344         if (band)
1345                 saturation_power = priv->calib_info->saturation_power24;
1346         else
1347                 saturation_power = priv->calib_info->saturation_power52;
1348
1349         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
1350             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
1351                 if (band)
1352                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
1353                 else
1354                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
1355         }
1356
1357         /* regulatory txpower limits ... reg_limit values are in half-dBm,
1358          *   max_power_avg values are in dBm, convert * 2 */
1359         if (is_fat)
1360                 reg_limit = ch_info->fat_max_power_avg * 2;
1361         else
1362                 reg_limit = ch_info->max_power_avg * 2;
1363
1364         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
1365             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
1366                 if (band)
1367                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
1368                 else
1369                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
1370         }
1371
1372         /* Interpolate txpower calibration values for this channel,
1373          *   based on factory calibration tests on spaced channels. */
1374         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
1375
1376         /* calculate tx gain adjustment based on power supply voltage */
1377         voltage = priv->calib_info->voltage;
1378         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
1379         voltage_compensation =
1380             iwl4965_get_voltage_compensation(voltage, init_voltage);
1381
1382         IWL_DEBUG_TXPOWER(priv, "curr volt %d eeprom volt %d volt comp %d\n",
1383                           init_voltage,
1384                           voltage, voltage_compensation);
1385
1386         /* get current temperature (Celsius) */
1387         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
1388         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
1389         current_temp = KELVIN_TO_CELSIUS(current_temp);
1390
1391         /* select thermal txpower adjustment params, based on channel group
1392          *   (same frequency group used for mimo txatten adjustment) */
1393         degrees_per_05db_num =
1394             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
1395         degrees_per_05db_denom =
1396             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
1397
1398         /* get per-chain txpower values from factory measurements */
1399         for (c = 0; c < 2; c++) {
1400                 measurement = &ch_eeprom_info.measurements[c][1];
1401
1402                 /* txgain adjustment (in half-dB steps) based on difference
1403                  *   between factory and current temperature */
1404                 factory_temp = measurement->temperature;
1405                 iwl4965_math_div_round((current_temp - factory_temp) *
1406                                        degrees_per_05db_denom,
1407                                        degrees_per_05db_num,
1408                                        &temperature_comp[c]);
1409
1410                 factory_gain_index[c] = measurement->gain_idx;
1411                 factory_actual_pwr[c] = measurement->actual_pow;
1412
1413                 IWL_DEBUG_TXPOWER(priv, "chain = %d\n", c);
1414                 IWL_DEBUG_TXPOWER(priv, "fctry tmp %d, "
1415                                   "curr tmp %d, comp %d steps\n",
1416                                   factory_temp, current_temp,
1417                                   temperature_comp[c]);
1418
1419                 IWL_DEBUG_TXPOWER(priv, "fctry idx %d, fctry pwr %d\n",
1420                                   factory_gain_index[c],
1421                                   factory_actual_pwr[c]);
1422         }
1423
1424         /* for each of 33 bit-rates (including 1 for CCK) */
1425         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
1426                 u8 is_mimo_rate;
1427                 union iwl4965_tx_power_dual_stream tx_power;
1428
1429                 /* for mimo, reduce each chain's txpower by half
1430                  * (3dB, 6 steps), so total output power is regulatory
1431                  * compliant. */
1432                 if (i & 0x8) {
1433                         current_regulatory = reg_limit -
1434                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
1435                         is_mimo_rate = 1;
1436                 } else {
1437                         current_regulatory = reg_limit;
1438                         is_mimo_rate = 0;
1439                 }
1440
1441                 /* find txpower limit, either hardware or regulatory */
1442                 power_limit = saturation_power - back_off_table[i];
1443                 if (power_limit > current_regulatory)
1444                         power_limit = current_regulatory;
1445
1446                 /* reduce user's txpower request if necessary
1447                  * for this rate on this channel */
1448                 target_power = user_target_power;
1449                 if (target_power > power_limit)
1450                         target_power = power_limit;
1451
1452                 IWL_DEBUG_TXPOWER(priv, "rate %d sat %d reg %d usr %d tgt %d\n",
1453                                   i, saturation_power - back_off_table[i],
1454                                   current_regulatory, user_target_power,
1455                                   target_power);
1456
1457                 /* for each of 2 Tx chains (radio transmitters) */
1458                 for (c = 0; c < 2; c++) {
1459                         s32 atten_value;
1460
1461                         if (is_mimo_rate)
1462                                 atten_value =
1463                                     (s32)le32_to_cpu(priv->card_alive_init.
1464                                     tx_atten[txatten_grp][c]);
1465                         else
1466                                 atten_value = 0;
1467
1468                         /* calculate index; higher index means lower txpower */
1469                         power_index = (u8) (factory_gain_index[c] -
1470                                             (target_power -
1471                                              factory_actual_pwr[c]) -
1472                                             temperature_comp[c] -
1473                                             voltage_compensation +
1474                                             atten_value);
1475
1476 /*                      IWL_DEBUG_TXPOWER(priv, "calculated txpower index %d\n",
1477                                                 power_index); */
1478
1479                         if (power_index < get_min_power_index(i, band))
1480                                 power_index = get_min_power_index(i, band);
1481
1482                         /* adjust 5 GHz index to support negative indexes */
1483                         if (!band)
1484                                 power_index += 9;
1485
1486                         /* CCK, rate 32, reduce txpower for CCK */
1487                         if (i == POWER_TABLE_CCK_ENTRY)
1488                                 power_index +=
1489                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
1490
1491                         /* stay within the table! */
1492                         if (power_index > 107) {
1493                                 IWL_WARN(priv, "txpower index %d > 107\n",
1494                                             power_index);
1495                                 power_index = 107;
1496                         }
1497                         if (power_index < 0) {
1498                                 IWL_WARN(priv, "txpower index %d < 0\n",
1499                                             power_index);
1500                                 power_index = 0;
1501                         }
1502
1503                         /* fill txpower command for this rate/chain */
1504                         tx_power.s.radio_tx_gain[c] =
1505                                 gain_table[band][power_index].radio;
1506                         tx_power.s.dsp_predis_atten[c] =
1507                                 gain_table[band][power_index].dsp;
1508
1509                         IWL_DEBUG_TXPOWER(priv, "chain %d mimo %d index %d "
1510                                           "gain 0x%02x dsp %d\n",
1511                                           c, atten_value, power_index,
1512                                         tx_power.s.radio_tx_gain[c],
1513                                         tx_power.s.dsp_predis_atten[c]);
1514                 } /* for each chain */
1515
1516                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
1517
1518         } /* for each rate */
1519
1520         return 0;
1521 }
1522
1523 /**
1524  * iwl4965_send_tx_power - Configure the TXPOWER level user limit
1525  *
1526  * Uses the active RXON for channel, band, and characteristics (fat, high)
1527  * The power limit is taken from priv->tx_power_user_lmt.
1528  */
1529 static int iwl4965_send_tx_power(struct iwl_priv *priv)
1530 {
1531         struct iwl4965_txpowertable_cmd cmd = { 0 };
1532         int ret;
1533         u8 band = 0;
1534         u8 is_fat = 0;
1535         u8 ctrl_chan_high = 0;
1536
1537         if (test_bit(STATUS_SCANNING, &priv->status)) {
1538                 /* If this gets hit a lot, switch it to a BUG() and catch
1539                  * the stack trace to find out who is calling this during
1540                  * a scan. */
1541                 IWL_WARN(priv, "TX Power requested while scanning!\n");
1542                 return -EAGAIN;
1543         }
1544
1545         band = priv->band == IEEE80211_BAND_2GHZ;
1546
1547         is_fat =  is_fat_channel(priv->active_rxon.flags);
1548
1549         if (is_fat &&
1550             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1551                 ctrl_chan_high = 1;
1552
1553         cmd.band = band;
1554         cmd.channel = priv->active_rxon.channel;
1555
1556         ret = iwl4965_fill_txpower_tbl(priv, band,
1557                                 le16_to_cpu(priv->active_rxon.channel),
1558                                 is_fat, ctrl_chan_high, &cmd.tx_power);
1559         if (ret)
1560                 goto out;
1561
1562         ret = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
1563
1564 out:
1565         return ret;
1566 }
1567
1568 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
1569 {
1570         int ret = 0;
1571         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1572         const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1573         const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1574
1575         if ((rxon1->flags == rxon2->flags) &&
1576             (rxon1->filter_flags == rxon2->filter_flags) &&
1577             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1578             (rxon1->ofdm_ht_single_stream_basic_rates ==
1579              rxon2->ofdm_ht_single_stream_basic_rates) &&
1580             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1581              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1582             (rxon1->rx_chain == rxon2->rx_chain) &&
1583             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1584                 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC.  Not resending.\n");
1585                 return 0;
1586         }
1587
1588         rxon_assoc.flags = priv->staging_rxon.flags;
1589         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1590         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1591         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1592         rxon_assoc.reserved = 0;
1593         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1594             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1595         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1596             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1597         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1598
1599         ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
1600                                      sizeof(rxon_assoc), &rxon_assoc, NULL);
1601         if (ret)
1602                 return ret;
1603
1604         return ret;
1605 }
1606
1607 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
1608 static int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
1609 {
1610         int rc;
1611         u8 band = 0;
1612         u8 is_fat = 0;
1613         u8 ctrl_chan_high = 0;
1614         struct iwl4965_channel_switch_cmd cmd = { 0 };
1615         const struct iwl_channel_info *ch_info;
1616
1617         band = priv->band == IEEE80211_BAND_2GHZ;
1618
1619         ch_info = iwl_get_channel_info(priv, priv->band, channel);
1620
1621         is_fat = is_fat_channel(priv->staging_rxon.flags);
1622
1623         if (is_fat &&
1624             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1625                 ctrl_chan_high = 1;
1626
1627         cmd.band = band;
1628         cmd.expect_beacon = 0;
1629         cmd.channel = cpu_to_le16(channel);
1630         cmd.rxon_flags = priv->active_rxon.flags;
1631         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
1632         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
1633         if (ch_info)
1634                 cmd.expect_beacon = is_channel_radar(ch_info);
1635         else
1636                 cmd.expect_beacon = 1;
1637
1638         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
1639                                       ctrl_chan_high, &cmd.tx_power);
1640         if (rc) {
1641                 IWL_DEBUG_11H(priv, "error:%d  fill txpower_tbl\n", rc);
1642                 return rc;
1643         }
1644
1645         rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
1646         return rc;
1647 }
1648 #endif
1649
1650 /**
1651  * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
1652  */
1653 static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
1654                                             struct iwl_tx_queue *txq,
1655                                             u16 byte_cnt)
1656 {
1657         struct iwl4965_scd_bc_tbl *scd_bc_tbl = priv->scd_bc_tbls.addr;
1658         int txq_id = txq->q.id;
1659         int write_ptr = txq->q.write_ptr;
1660         int len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
1661         __le16 bc_ent;
1662
1663         WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX);
1664
1665         bc_ent = cpu_to_le16(len & 0xFFF);
1666         /* Set up byte count within first 256 entries */
1667         scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent;
1668
1669         /* If within first 64 entries, duplicate at end */
1670         if (write_ptr < TFD_QUEUE_SIZE_BC_DUP)
1671                 scd_bc_tbl[txq_id].
1672                         tfd_offset[TFD_QUEUE_SIZE_MAX + write_ptr] = bc_ent;
1673 }
1674
1675 /**
1676  * sign_extend - Sign extend a value using specified bit as sign-bit
1677  *
1678  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
1679  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
1680  *
1681  * @param oper value to sign extend
1682  * @param index 0 based bit index (0<=index<32) to sign bit
1683  */
1684 static s32 sign_extend(u32 oper, int index)
1685 {
1686         u8 shift = 31 - index;
1687
1688         return (s32)(oper << shift) >> shift;
1689 }
1690
1691 /**
1692  * iwl4965_hw_get_temperature - return the calibrated temperature (in Kelvin)
1693  * @statistics: Provides the temperature reading from the uCode
1694  *
1695  * A return of <0 indicates bogus data in the statistics
1696  */
1697 static int iwl4965_hw_get_temperature(const struct iwl_priv *priv)
1698 {
1699         s32 temperature;
1700         s32 vt;
1701         s32 R1, R2, R3;
1702         u32 R4;
1703
1704         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
1705                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
1706                 IWL_DEBUG_TEMP(priv, "Running FAT temperature calibration\n");
1707                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
1708                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
1709                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
1710                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
1711         } else {
1712                 IWL_DEBUG_TEMP(priv, "Running temperature calibration\n");
1713                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
1714                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
1715                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
1716                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
1717         }
1718
1719         /*
1720          * Temperature is only 23 bits, so sign extend out to 32.
1721          *
1722          * NOTE If we haven't received a statistics notification yet
1723          * with an updated temperature, use R4 provided to us in the
1724          * "initialize" ALIVE response.
1725          */
1726         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
1727                 vt = sign_extend(R4, 23);
1728         else
1729                 vt = sign_extend(
1730                         le32_to_cpu(priv->statistics.general.temperature), 23);
1731
1732         IWL_DEBUG_TEMP(priv, "Calib values R[1-3]: %d %d %d R4: %d\n", R1, R2, R3, vt);
1733
1734         if (R3 == R1) {
1735                 IWL_ERR(priv, "Calibration conflict R1 == R3\n");
1736                 return -1;
1737         }
1738
1739         /* Calculate temperature in degrees Kelvin, adjust by 97%.
1740          * Add offset to center the adjustment around 0 degrees Centigrade. */
1741         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
1742         temperature /= (R3 - R1);
1743         temperature = (temperature * 97) / 100 + TEMPERATURE_CALIB_KELVIN_OFFSET;
1744
1745         IWL_DEBUG_TEMP(priv, "Calibrated temperature: %dK, %dC\n",
1746                         temperature, KELVIN_TO_CELSIUS(temperature));
1747
1748         return temperature;
1749 }
1750
1751 /* Adjust Txpower only if temperature variance is greater than threshold. */
1752 #define IWL_TEMPERATURE_THRESHOLD   3
1753
1754 /**
1755  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
1756  *
1757  * If the temperature changed has changed sufficiently, then a recalibration
1758  * is needed.
1759  *
1760  * Assumes caller will replace priv->last_temperature once calibration
1761  * executed.
1762  */
1763 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
1764 {
1765         int temp_diff;
1766
1767         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
1768                 IWL_DEBUG_TEMP(priv, "Temperature not updated -- no statistics.\n");
1769                 return 0;
1770         }
1771
1772         temp_diff = priv->temperature - priv->last_temperature;
1773
1774         /* get absolute value */
1775         if (temp_diff < 0) {
1776                 IWL_DEBUG_POWER(priv, "Getting cooler, delta %d, \n", temp_diff);
1777                 temp_diff = -temp_diff;
1778         } else if (temp_diff == 0)
1779                 IWL_DEBUG_POWER(priv, "Same temp, \n");
1780         else
1781                 IWL_DEBUG_POWER(priv, "Getting warmer, delta %d, \n", temp_diff);
1782
1783         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
1784                 IWL_DEBUG_POWER(priv, "Thermal txpower calib not needed\n");
1785                 return 0;
1786         }
1787
1788         IWL_DEBUG_POWER(priv, "Thermal txpower calib needed\n");
1789
1790         return 1;
1791 }
1792
1793 static void iwl4965_temperature_calib(struct iwl_priv *priv)
1794 {
1795         s32 temp;
1796
1797         temp = iwl4965_hw_get_temperature(priv);
1798         if (temp < 0)
1799                 return;
1800
1801         if (priv->temperature != temp) {
1802                 if (priv->temperature)
1803                         IWL_DEBUG_TEMP(priv, "Temperature changed "
1804                                        "from %dC to %dC\n",
1805                                        KELVIN_TO_CELSIUS(priv->temperature),
1806                                        KELVIN_TO_CELSIUS(temp));
1807                 else
1808                         IWL_DEBUG_TEMP(priv, "Temperature "
1809                                        "initialized to %dC\n",
1810                                        KELVIN_TO_CELSIUS(temp));
1811         }
1812
1813         priv->temperature = temp;
1814         set_bit(STATUS_TEMPERATURE, &priv->status);
1815
1816         if (!priv->disable_tx_power_cal &&
1817              unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
1818              iwl4965_is_temp_calib_needed(priv))
1819                 queue_work(priv->workqueue, &priv->txpower_work);
1820 }
1821
1822 /**
1823  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
1824  */
1825 static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
1826                                             u16 txq_id)
1827 {
1828         /* Simply stop the queue, but don't change any configuration;
1829          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
1830         iwl_write_prph(priv,
1831                 IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
1832                 (0 << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE)|
1833                 (1 << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
1834 }
1835
1836 /**
1837  * txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE
1838  * priv->lock must be held by the caller
1839  */
1840 static int iwl4965_txq_agg_disable(struct iwl_priv *priv, u16 txq_id,
1841                                    u16 ssn_idx, u8 tx_fifo)
1842 {
1843         int ret = 0;
1844
1845         if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
1846             (IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES <= txq_id)) {
1847                 IWL_WARN(priv,
1848                         "queue number out of range: %d, must be %d to %d\n",
1849                         txq_id, IWL49_FIRST_AMPDU_QUEUE,
1850                         IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES - 1);
1851                 return -EINVAL;
1852         }
1853
1854         ret = iwl_grab_nic_access(priv);
1855         if (ret)
1856                 return ret;
1857
1858         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
1859
1860         iwl_clear_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
1861
1862         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
1863         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
1864         /* supposes that ssn_idx is valid (!= 0xFFF) */
1865         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
1866
1867         iwl_clear_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
1868         iwl_txq_ctx_deactivate(priv, txq_id);
1869         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
1870
1871         iwl_release_nic_access(priv);
1872
1873         return 0;
1874 }
1875
1876 /**
1877  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
1878  */
1879 static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
1880                                         u16 txq_id)
1881 {
1882         u32 tbl_dw_addr;
1883         u32 tbl_dw;
1884         u16 scd_q2ratid;
1885
1886         scd_q2ratid = ra_tid & IWL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
1887
1888         tbl_dw_addr = priv->scd_base_addr +
1889                         IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
1890
1891         tbl_dw = iwl_read_targ_mem(priv, tbl_dw_addr);
1892
1893         if (txq_id & 0x1)
1894                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
1895         else
1896                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
1897
1898         iwl_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
1899
1900         return 0;
1901 }
1902
1903
1904 /**
1905  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
1906  *
1907  * NOTE:  txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE,
1908  *        i.e. it must be one of the higher queues used for aggregation
1909  */
1910 static int iwl4965_txq_agg_enable(struct iwl_priv *priv, int txq_id,
1911                                   int tx_fifo, int sta_id, int tid, u16 ssn_idx)
1912 {
1913         unsigned long flags;
1914         int ret;
1915         u16 ra_tid;
1916
1917         if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
1918             (IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES <= txq_id)) {
1919                 IWL_WARN(priv,
1920                         "queue number out of range: %d, must be %d to %d\n",
1921                         txq_id, IWL49_FIRST_AMPDU_QUEUE,
1922                         IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES - 1);
1923                 return -EINVAL;
1924         }
1925
1926         ra_tid = BUILD_RAxTID(sta_id, tid);
1927
1928         /* Modify device's station table to Tx this TID */
1929         iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
1930
1931         spin_lock_irqsave(&priv->lock, flags);
1932         ret = iwl_grab_nic_access(priv);
1933         if (ret) {
1934                 spin_unlock_irqrestore(&priv->lock, flags);
1935                 return ret;
1936         }
1937
1938         /* Stop this Tx queue before configuring it */
1939         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
1940
1941         /* Map receiver-address / traffic-ID to this queue */
1942         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
1943
1944         /* Set this queue as a chain-building queue */
1945         iwl_set_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
1946
1947         /* Place first TFD at index corresponding to start sequence number.
1948          * Assumes that ssn_idx is valid (!= 0xFFF) */
1949         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
1950         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
1951         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
1952
1953         /* Set up Tx window size and frame limit for this queue */
1954         iwl_write_targ_mem(priv,
1955                 priv->scd_base_addr + IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
1956                 (SCD_WIN_SIZE << IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1957                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1958
1959         iwl_write_targ_mem(priv, priv->scd_base_addr +
1960                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
1961                 (SCD_FRAME_LIMIT << IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
1962                 & IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1963
1964         iwl_set_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
1965
1966         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
1967         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
1968
1969         iwl_release_nic_access(priv);
1970         spin_unlock_irqrestore(&priv->lock, flags);
1971
1972         return 0;
1973 }
1974
1975
1976 static u16 iwl4965_get_hcmd_size(u8 cmd_id, u16 len)
1977 {
1978         switch (cmd_id) {
1979         case REPLY_RXON:
1980                 return (u16) sizeof(struct iwl4965_rxon_cmd);
1981         default:
1982                 return len;
1983         }
1984 }
1985
1986 static u16 iwl4965_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
1987 {
1988         struct iwl4965_addsta_cmd *addsta = (struct iwl4965_addsta_cmd *)data;
1989         addsta->mode = cmd->mode;
1990         memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
1991         memcpy(&addsta->key, &cmd->key, sizeof(struct iwl4965_keyinfo));
1992         addsta->station_flags = cmd->station_flags;
1993         addsta->station_flags_msk = cmd->station_flags_msk;
1994         addsta->tid_disable_tx = cmd->tid_disable_tx;
1995         addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
1996         addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
1997         addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
1998         addsta->reserved1 = cpu_to_le16(0);
1999         addsta->reserved2 = cpu_to_le32(0);
2000
2001         return (u16)sizeof(struct iwl4965_addsta_cmd);
2002 }
2003
2004 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2005 {
2006         return le32_to_cpup(&tx_resp->u.status + tx_resp->frame_count) & MAX_SN;
2007 }
2008
2009 /**
2010  * iwl4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue
2011  */
2012 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2013                                       struct iwl_ht_agg *agg,
2014                                       struct iwl4965_tx_resp *tx_resp,
2015                                       int txq_id, u16 start_idx)
2016 {
2017         u16 status;
2018         struct agg_tx_status *frame_status = tx_resp->u.agg_status;
2019         struct ieee80211_tx_info *info = NULL;
2020         struct ieee80211_hdr *hdr = NULL;
2021         u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2022         int i, sh, idx;
2023         u16 seq;
2024         if (agg->wait_for_ba)
2025                 IWL_DEBUG_TX_REPLY(priv, "got tx response w/o block-ack\n");
2026
2027         agg->frame_count = tx_resp->frame_count;
2028         agg->start_idx = start_idx;
2029         agg->rate_n_flags = rate_n_flags;
2030         agg->bitmap = 0;
2031
2032         /* num frames attempted by Tx command */
2033         if (agg->frame_count == 1) {
2034                 /* Only one frame was attempted; no block-ack will arrive */
2035                 status = le16_to_cpu(frame_status[0].status);
2036                 idx = start_idx;
2037
2038                 /* FIXME: code repetition */
2039                 IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, StartIdx=%d idx=%d\n",
2040                                    agg->frame_count, agg->start_idx, idx);
2041
2042                 info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb[0]);
2043                 info->status.rates[0].count = tx_resp->failure_frame + 1;
2044                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
2045                 info->flags |= iwl_is_tx_success(status) ?
2046                         IEEE80211_TX_STAT_ACK : 0;
2047                 iwl_hwrate_to_tx_control(priv, rate_n_flags, info);
2048                 /* FIXME: code repetition end */
2049
2050                 IWL_DEBUG_TX_REPLY(priv, "1 Frame 0x%x failure :%d\n",
2051                                     status & 0xff, tx_resp->failure_frame);
2052                 IWL_DEBUG_TX_REPLY(priv, "Rate Info rate_n_flags=%x\n", rate_n_flags);
2053
2054                 agg->wait_for_ba = 0;
2055         } else {
2056                 /* Two or more frames were attempted; expect block-ack */
2057                 u64 bitmap = 0;
2058                 int start = agg->start_idx;
2059
2060                 /* Construct bit-map of pending frames within Tx window */
2061                 for (i = 0; i < agg->frame_count; i++) {
2062                         u16 sc;
2063                         status = le16_to_cpu(frame_status[i].status);
2064                         seq  = le16_to_cpu(frame_status[i].sequence);
2065                         idx = SEQ_TO_INDEX(seq);
2066                         txq_id = SEQ_TO_QUEUE(seq);
2067
2068                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2069                                       AGG_TX_STATE_ABORT_MSK))
2070                                 continue;
2071
2072                         IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, txq_id=%d idx=%d\n",
2073                                            agg->frame_count, txq_id, idx);
2074
2075                         hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
2076
2077                         sc = le16_to_cpu(hdr->seq_ctrl);
2078                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2079                                 IWL_ERR(priv,
2080                                         "BUG_ON idx doesn't match seq control"
2081                                         " idx=%d, seq_idx=%d, seq=%d\n",
2082                                         idx, SEQ_TO_SN(sc), hdr->seq_ctrl);
2083                                 return -1;
2084                         }
2085
2086                         IWL_DEBUG_TX_REPLY(priv, "AGG Frame i=%d idx %d seq=%d\n",
2087                                            i, idx, SEQ_TO_SN(sc));
2088
2089                         sh = idx - start;
2090                         if (sh > 64) {
2091                                 sh = (start - idx) + 0xff;
2092                                 bitmap = bitmap << sh;
2093                                 sh = 0;
2094                                 start = idx;
2095                         } else if (sh < -64)
2096                                 sh  = 0xff - (start - idx);
2097                         else if (sh < 0) {
2098                                 sh = start - idx;
2099                                 start = idx;
2100                                 bitmap = bitmap << sh;
2101                                 sh = 0;
2102                         }
2103                         bitmap |= 1ULL << sh;
2104                         IWL_DEBUG_TX_REPLY(priv, "start=%d bitmap=0x%llx\n",
2105                                            start, (unsigned long long)bitmap);
2106                 }
2107
2108                 agg->bitmap = bitmap;
2109                 agg->start_idx = start;
2110                 IWL_DEBUG_TX_REPLY(priv, "Frames %d start_idx=%d bitmap=0x%llx\n",
2111                                    agg->frame_count, agg->start_idx,
2112                                    (unsigned long long)agg->bitmap);
2113
2114                 if (bitmap)
2115                         agg->wait_for_ba = 1;
2116         }
2117         return 0;
2118 }
2119
2120 /**
2121  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2122  */
2123 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2124                                 struct iwl_rx_mem_buffer *rxb)
2125 {
2126         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2127         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2128         int txq_id = SEQ_TO_QUEUE(sequence);
2129         int index = SEQ_TO_INDEX(sequence);
2130         struct iwl_tx_queue *txq = &priv->txq[txq_id];
2131         struct ieee80211_hdr *hdr;
2132         struct ieee80211_tx_info *info;
2133         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2134         u32  status = le32_to_cpu(tx_resp->u.status);
2135         int tid = MAX_TID_COUNT;
2136         int sta_id;
2137         int freed;
2138         u8 *qc = NULL;
2139
2140         if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
2141                 IWL_ERR(priv, "Read index for DMA queue txq_id (%d) index %d "
2142                           "is out of range [0-%d] %d %d\n", txq_id,
2143                           index, txq->q.n_bd, txq->q.write_ptr,
2144                           txq->q.read_ptr);
2145                 return;
2146         }
2147
2148         info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]);
2149         memset(&info->status, 0, sizeof(info->status));
2150
2151         hdr = iwl_tx_queue_get_hdr(priv, txq_id, index);
2152         if (ieee80211_is_data_qos(hdr->frame_control)) {
2153                 qc = ieee80211_get_qos_ctl(hdr);
2154                 tid = qc[0] & 0xf;
2155         }
2156
2157         sta_id = iwl_get_ra_sta_id(priv, hdr);
2158         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2159                 IWL_ERR(priv, "Station not known\n");
2160                 return;
2161         }
2162
2163         if (txq->sched_retry) {
2164                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2165                 struct iwl_ht_agg *agg = NULL;
2166
2167                 WARN_ON(!qc);
2168
2169                 agg = &priv->stations[sta_id].tid[tid].agg;
2170
2171                 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
2172
2173                 /* check if BAR is needed */
2174                 if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status))
2175                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
2176
2177                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2178                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2179                         IWL_DEBUG_TX_REPLY(priv, "Retry scheduler reclaim scd_ssn "
2180                                            "%d index %d\n", scd_ssn , index);
2181                         freed = iwl_tx_queue_reclaim(priv, txq_id, index);
2182                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2183
2184                         if (priv->mac80211_registered &&
2185                             (iwl_queue_space(&txq->q) > txq->q.low_mark) &&
2186                             (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)) {
2187                                 if (agg->state == IWL_AGG_OFF)
2188                                         iwl_wake_queue(priv, txq_id);
2189                                 else
2190                                         iwl_wake_queue(priv, txq->swq_id);
2191                         }
2192                 }
2193         } else {
2194                 info->status.rates[0].count = tx_resp->failure_frame + 1;
2195                 info->flags |= iwl_is_tx_success(status) ?
2196                                         IEEE80211_TX_STAT_ACK : 0;
2197                 iwl_hwrate_to_tx_control(priv,
2198                                         le32_to_cpu(tx_resp->rate_n_flags),
2199                                         info);
2200
2201                 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x) "
2202                                    "rate_n_flags 0x%x retries %d\n",
2203                                    txq_id,
2204                                    iwl_get_tx_fail_reason(status), status,
2205                                    le32_to_cpu(tx_resp->rate_n_flags),
2206                                    tx_resp->failure_frame);
2207
2208                 freed = iwl_tx_queue_reclaim(priv, txq_id, index);
2209                 if (qc && likely(sta_id != IWL_INVALID_STATION))
2210                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2211
2212                 if (priv->mac80211_registered &&
2213                     (iwl_queue_space(&txq->q) > txq->q.low_mark))
2214                         iwl_wake_queue(priv, txq_id);
2215         }
2216
2217         if (qc && likely(sta_id != IWL_INVALID_STATION))
2218                 iwl_txq_check_empty(priv, sta_id, tid, txq_id);
2219
2220         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
2221                 IWL_ERR(priv, "TODO:  Implement Tx ABORT REQUIRED!!!\n");
2222 }
2223
2224 static int iwl4965_calc_rssi(struct iwl_priv *priv,
2225                              struct iwl_rx_phy_res *rx_resp)
2226 {
2227         /* data from PHY/DSP regarding signal strength, etc.,
2228          *   contents are always there, not configurable by host.  */
2229         struct iwl4965_rx_non_cfg_phy *ncphy =
2230             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
2231         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL49_AGC_DB_MASK)
2232                         >> IWL49_AGC_DB_POS;
2233
2234         u32 valid_antennae =
2235             (le16_to_cpu(rx_resp->phy_flags) & IWL49_RX_PHY_FLAGS_ANTENNAE_MASK)
2236                         >> IWL49_RX_PHY_FLAGS_ANTENNAE_OFFSET;
2237         u8 max_rssi = 0;
2238         u32 i;
2239
2240         /* Find max rssi among 3 possible receivers.
2241          * These values are measured by the digital signal processor (DSP).
2242          * They should stay fairly constant even as the signal strength varies,
2243          *   if the radio's automatic gain control (AGC) is working right.
2244          * AGC value (see below) will provide the "interesting" info. */
2245         for (i = 0; i < 3; i++)
2246                 if (valid_antennae & (1 << i))
2247                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
2248
2249         IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
2250                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
2251                 max_rssi, agc);
2252
2253         /* dBm = max_rssi dB - agc dB - constant.
2254          * Higher AGC (higher radio gain) means lower signal. */
2255         return max_rssi - agc - IWL49_RSSI_OFFSET;
2256 }
2257
2258
2259 /* Set up 4965-specific Rx frame reply handlers */
2260 static void iwl4965_rx_handler_setup(struct iwl_priv *priv)
2261 {
2262         /* Legacy Rx frames */
2263         priv->rx_handlers[REPLY_RX] = iwl_rx_reply_rx;
2264         /* Tx response */
2265         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
2266 }
2267
2268 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
2269 {
2270         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
2271 }
2272
2273 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
2274 {
2275         cancel_work_sync(&priv->txpower_work);
2276 }
2277
2278 static struct iwl_station_mgmt_ops iwl4965_station_mgmt = {
2279         .add_station = iwl_add_station_flags,
2280         .remove_station = iwl_remove_station,
2281         .find_station = iwl_find_station,
2282         .clear_station_table = iwl_clear_stations_table,
2283 };
2284
2285 static struct iwl_hcmd_ops iwl4965_hcmd = {
2286         .rxon_assoc = iwl4965_send_rxon_assoc,
2287         .commit_rxon = iwl_commit_rxon,
2288         .set_rxon_chain = iwl_set_rxon_chain,
2289 };
2290
2291 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
2292         .get_hcmd_size = iwl4965_get_hcmd_size,
2293         .build_addsta_hcmd = iwl4965_build_addsta_hcmd,
2294         .chain_noise_reset = iwl4965_chain_noise_reset,
2295         .gain_computation = iwl4965_gain_computation,
2296         .rts_tx_cmd_flag = iwl4965_rts_tx_cmd_flag,
2297         .calc_rssi = iwl4965_calc_rssi,
2298 };
2299
2300 static struct iwl_lib_ops iwl4965_lib = {
2301         .set_hw_params = iwl4965_hw_set_hw_params,
2302         .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
2303         .txq_set_sched = iwl4965_txq_set_sched,
2304         .txq_agg_enable = iwl4965_txq_agg_enable,
2305         .txq_agg_disable = iwl4965_txq_agg_disable,
2306         .txq_attach_buf_to_tfd = iwl_hw_txq_attach_buf_to_tfd,
2307         .txq_free_tfd = iwl_hw_txq_free_tfd,
2308         .txq_init = iwl_hw_tx_queue_init,
2309         .rx_handler_setup = iwl4965_rx_handler_setup,
2310         .setup_deferred_work = iwl4965_setup_deferred_work,
2311         .cancel_deferred_work = iwl4965_cancel_deferred_work,
2312         .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
2313         .alive_notify = iwl4965_alive_notify,
2314         .init_alive_start = iwl4965_init_alive_start,
2315         .load_ucode = iwl4965_load_bsm,
2316         .apm_ops = {
2317                 .init = iwl4965_apm_init,
2318                 .reset = iwl4965_apm_reset,
2319                 .stop = iwl4965_apm_stop,
2320                 .config = iwl4965_nic_config,
2321                 .set_pwr_src = iwl_set_pwr_src,
2322         },
2323         .eeprom_ops = {
2324                 .regulatory_bands = {
2325                         EEPROM_REGULATORY_BAND_1_CHANNELS,
2326                         EEPROM_REGULATORY_BAND_2_CHANNELS,
2327                         EEPROM_REGULATORY_BAND_3_CHANNELS,
2328                         EEPROM_REGULATORY_BAND_4_CHANNELS,
2329                         EEPROM_REGULATORY_BAND_5_CHANNELS,
2330                         EEPROM_4965_REGULATORY_BAND_24_FAT_CHANNELS,
2331                         EEPROM_4965_REGULATORY_BAND_52_FAT_CHANNELS
2332                 },
2333                 .verify_signature  = iwlcore_eeprom_verify_signature,
2334                 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
2335                 .release_semaphore = iwlcore_eeprom_release_semaphore,
2336                 .calib_version = iwl4965_eeprom_calib_version,
2337                 .query_addr = iwlcore_eeprom_query_addr,
2338         },
2339         .send_tx_power  = iwl4965_send_tx_power,
2340         .update_chain_flags = iwl_update_chain_flags,
2341         .post_associate = iwl_post_associate,
2342         .config_ap = iwl_config_ap,
2343         .temp_ops = {
2344                 .temperature = iwl4965_temperature_calib,
2345                 .set_ct_kill = iwl4965_set_ct_threshold,
2346         },
2347 };
2348
2349 static struct iwl_ops iwl4965_ops = {
2350         .lib = &iwl4965_lib,
2351         .hcmd = &iwl4965_hcmd,
2352         .utils = &iwl4965_hcmd_utils,
2353         .smgmt = &iwl4965_station_mgmt,
2354 };
2355
2356 struct iwl_cfg iwl4965_agn_cfg = {
2357         .name = "4965AGN",
2358         .fw_name_pre = IWL4965_FW_PRE,
2359         .ucode_api_max = IWL4965_UCODE_API_MAX,
2360         .ucode_api_min = IWL4965_UCODE_API_MIN,
2361         .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
2362         .eeprom_size = IWL4965_EEPROM_IMG_SIZE,
2363         .eeprom_ver = EEPROM_4965_EEPROM_VERSION,
2364         .eeprom_calib_ver = EEPROM_4965_TX_POWER_VERSION,
2365         .ops = &iwl4965_ops,
2366         .mod_params = &iwl4965_mod_params,
2367 };
2368
2369 /* Module firmware */
2370 MODULE_FIRMWARE(IWL4965_MODULE_FIRMWARE(IWL4965_UCODE_API_MAX));
2371
2372 module_param_named(antenna, iwl4965_mod_params.antenna, int, 0444);
2373 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
2374 module_param_named(swcrypto, iwl4965_mod_params.sw_crypto, int, 0444);
2375 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
2376 module_param_named(debug, iwl4965_mod_params.debug, uint, 0444);
2377 MODULE_PARM_DESC(debug, "debug output mask");
2378 module_param_named(
2379         disable_hw_scan, iwl4965_mod_params.disable_hw_scan, int, 0444);
2380 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
2381
2382 module_param_named(queues_num, iwl4965_mod_params.num_of_queues, int, 0444);
2383 MODULE_PARM_DESC(queues_num, "number of hw queues.");
2384 /* 11n */
2385 module_param_named(11n_disable, iwl4965_mod_params.disable_11n, int, 0444);
2386 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
2387 module_param_named(amsdu_size_8K, iwl4965_mod_params.amsdu_size_8K, int, 0444);
2388 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
2389
2390 module_param_named(fw_restart4965, iwl4965_mod_params.restart_fw, int, 0444);
2391 MODULE_PARM_DESC(fw_restart4965, "restart firmware in case of error");