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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/pci.h>
  31 #include <linux/dma-mapping.h>
  32 #include <linux/delay.h>
  33 #include <linux/skbuff.h>
  34 #include <linux/netdevice.h>
  35 #include <linux/wireless.h>
  36 #include <net/mac80211.h>
  37 #include <linux/etherdevice.h>
  38 #include <asm/unaligned.h>
  39
  40 #include "iwl-eeprom.h"
  41 #include "iwl-dev.h"
  42 #include "iwl-core.h"
  43 #include "iwl-io.h"
  44 #include "iwl-helpers.h"
  45 #include "iwl-calib.h"
  46 #include "iwl-sta.h"
  47
  48 static int iwl4965_send_tx_power(struct iwl_priv *priv);
  49 static int iwl4965_hw_get_temperature(const struct iwl_priv *priv);
  50
  51 /* Change firmware file name, using "-" and incrementing number,
  52  *   *only* when uCode interface or architecture changes so that it
  53  *   is not compatible with earlier drivers.
  54  * This number will also appear in << 8 position of 1st dword of uCode file */
  55 #define IWL4965_UCODE_API "-2"
  56 #define IWL4965_MODULE_FIRMWARE "iwlwifi-4965" IWL4965_UCODE_API ".ucode"
  57
  58
  59 /* module parameters */
  60 static struct iwl_mod_params iwl4965_mod_params = {
  61         .num_of_queues = IWL49_NUM_QUEUES,
  62         .num_of_ampdu_queues = IWL49_NUM_AMPDU_QUEUES,
  63         .enable_qos = 1,
  64         .amsdu_size_8K = 1,
  65         .restart_fw = 1,
  66         /* the rest are 0 by default */
  67 };
  68
  69 /* check contents of special bootstrap uCode SRAM */
  70 static int iwl4965_verify_bsm(struct iwl_priv *priv)
  71 {
  72         __le32 *image = priv->ucode_boot.v_addr;
  73         u32 len = priv->ucode_boot.len;
  74         u32 reg;
  75         u32 val;
  76
  77         IWL_DEBUG_INFO("Begin verify bsm\n");
  78
  79         /* verify BSM SRAM contents */
  80         val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
  81         for (reg = BSM_SRAM_LOWER_BOUND;
  82              reg < BSM_SRAM_LOWER_BOUND + len;
  83              reg += sizeof(u32), image++) {
  84                 val = iwl_read_prph(priv, reg);
  85                 if (val != le32_to_cpu(*image)) {
  86                         IWL_ERROR("BSM uCode verification failed at "
  87                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
  88                                   BSM_SRAM_LOWER_BOUND,
  89                                   reg - BSM_SRAM_LOWER_BOUND, len,
  90                                   val, le32_to_cpu(*image));
  91                         return -EIO;
  92                 }
  93         }
  94
  95         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
  96
  97         return 0;
  98 }
  99
 100 /**
 101  * iwl4965_load_bsm - Load bootstrap instructions
 102  *
 103  * BSM operation:
 104  *
 105  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
 106  * in special SRAM that does not power down during RFKILL.  When powering back
 107  * up after power-saving sleeps (or during initial uCode load), the BSM loads
 108  * the bootstrap program into the on-board processor, and starts it.
 109  *
 110  * The bootstrap program loads (via DMA) instructions and data for a new
 111  * program from host DRAM locations indicated by the host driver in the
 112  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
 113  * automatically.
 114  *
 115  * When initializing the NIC, the host driver points the BSM to the
 116  * "initialize" uCode image.  This uCode sets up some internal data, then
 117  * notifies host via "initialize alive" that it is complete.
 118  *
 119  * The host then replaces the BSM_DRAM_* pointer values to point to the
 120  * normal runtime uCode instructions and a backup uCode data cache buffer
 121  * (filled initially with starting data values for the on-board processor),
 122  * then triggers the "initialize" uCode to load and launch the runtime uCode,
 123  * which begins normal operation.
 124  *
 125  * When doing a power-save shutdown, runtime uCode saves data SRAM into
 126  * the backup data cache in DRAM before SRAM is powered down.
 127  *
 128  * When powering back up, the BSM loads the bootstrap program.  This reloads
 129  * the runtime uCode instructions and the backup data cache into SRAM,
 130  * and re-launches the runtime uCode from where it left off.
 131  */
 132 static int iwl4965_load_bsm(struct iwl_priv *priv)
 133 {
 134         __le32 *image = priv->ucode_boot.v_addr;
 135         u32 len = priv->ucode_boot.len;
 136         dma_addr_t pinst;
 137         dma_addr_t pdata;
 138         u32 inst_len;
 139         u32 data_len;
 140         int i;
 141         u32 done;
 142         u32 reg_offset;
 143         int ret;
 144
 145         IWL_DEBUG_INFO("Begin load bsm\n");
 146
 147         priv->ucode_type = UCODE_RT;
 148
 149         /* make sure bootstrap program is no larger than BSM's SRAM size */
 150         if (len > IWL_MAX_BSM_SIZE)
 151                 return -EINVAL;
 152
 153         /* Tell bootstrap uCode where to find the "Initialize" uCode
 154          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
 155          * NOTE:  iwl_init_alive_start() will replace these values,
 156          *        after the "initialize" uCode has run, to point to
 157          *        runtime/protocol instructions and backup data cache.
 158          */
 159         pinst = priv->ucode_init.p_addr >> 4;
 160         pdata = priv->ucode_init_data.p_addr >> 4;
 161         inst_len = priv->ucode_init.len;
 162         data_len = priv->ucode_init_data.len;
 163
 164         ret = iwl_grab_nic_access(priv);
 165         if (ret)
 166                 return ret;
 167
 168         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 169         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 170         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
 171         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
 172
 173         /* Fill BSM memory with bootstrap instructions */
 174         for (reg_offset = BSM_SRAM_LOWER_BOUND;
 175              reg_offset < BSM_SRAM_LOWER_BOUND + len;
 176              reg_offset += sizeof(u32), image++)
 177                 _iwl_write_prph(priv, reg_offset, le32_to_cpu(*image));
 178
 179         ret = iwl4965_verify_bsm(priv);
 180         if (ret) {
 181                 iwl_release_nic_access(priv);
 182                 return ret;
 183         }
 184
 185         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
 186         iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
 187         iwl_write_prph(priv, BSM_WR_MEM_DST_REG, RTC_INST_LOWER_BOUND);
 188         iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
 189
 190         /* Load bootstrap code into instruction SRAM now,
 191          *   to prepare to load "initialize" uCode */
 192         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);
 193
 194         /* Wait for load of bootstrap uCode to finish */
 195         for (i = 0; i < 100; i++) {
 196                 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
 197                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
 198                         break;
 199                 udelay(10);
 200         }
 201         if (i < 100)
 202                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
 203         else {
 204                 IWL_ERROR("BSM write did not complete!\n");
 205                 return -EIO;
 206         }
 207
 208         /* Enable future boot loads whenever power management unit triggers it
 209          *   (e.g. when powering back up after power-save shutdown) */
 210         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
 211
 212         iwl_release_nic_access(priv);
 213
 214         return 0;
 215 }
 216
 217 /**
 218  * iwl4965_set_ucode_ptrs - Set uCode address location
 219  *
 220  * Tell initialization uCode where to find runtime uCode.
 221  *
 222  * BSM registers initially contain pointers to initialization uCode.
 223  * We need to replace them to load runtime uCode inst and data,
 224  * and to save runtime data when powering down.
 225  */
 226 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
 227 {
 228         dma_addr_t pinst;
 229         dma_addr_t pdata;
 230         unsigned long flags;
 231         int ret = 0;
 232
 233         /* bits 35:4 for 4965 */
 234         pinst = priv->ucode_code.p_addr >> 4;
 235         pdata = priv->ucode_data_backup.p_addr >> 4;
 236
 237         spin_lock_irqsave(&priv->lock, flags);
 238         ret = iwl_grab_nic_access(priv);
 239         if (ret) {
 240                 spin_unlock_irqrestore(&priv->lock, flags);
 241                 return ret;
 242         }
 243
 244         /* Tell bootstrap uCode where to find image to load */
 245         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 246         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 247         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
 248                                  priv->ucode_data.len);
 249
 250         /* Inst byte count must be last to set up, bit 31 signals uCode
 251          *   that all new ptr/size info is in place */
 252         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
 253                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
 254         iwl_release_nic_access(priv);
 255
 256         spin_unlock_irqrestore(&priv->lock, flags);
 257
 258         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
 259
 260         return ret;
 261 }
 262
 263 /**
 264  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
 265  *
 266  * Called after REPLY_ALIVE notification received from "initialize" uCode.
 267  *
 268  * The 4965 "initialize" ALIVE reply contains calibration data for:
 269  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
 270  *   (3945 does not contain this data).
 271  *
 272  * Tell "initialize" uCode to go ahead and load the runtime uCode.
 273 */
 274 static void iwl4965_init_alive_start(struct iwl_priv *priv)
 275 {
 276         /* Check alive response for "valid" sign from uCode */
 277         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
 278                 /* We had an error bringing up the hardware, so take it
 279                  * all the way back down so we can try again */
 280                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
 281                 goto restart;
 282         }
 283
 284         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
 285          * This is a paranoid check, because we would not have gotten the
 286          * "initialize" alive if code weren't properly loaded.  */
 287         if (iwl_verify_ucode(priv)) {
 288                 /* Runtime instruction load was bad;
 289                  * take it all the way back down so we can try again */
 290                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
 291                 goto restart;
 292         }
 293
 294         /* Calculate temperature */
 295         priv->temperature = iwl4965_hw_get_temperature(priv);
 296
 297         /* Send pointers to protocol/runtime uCode image ... init code will
 298          * load and launch runtime uCode, which will send us another "Alive"
 299          * notification. */
 300         IWL_DEBUG_INFO("Initialization Alive received.\n");
 301         if (iwl4965_set_ucode_ptrs(priv)) {
 302                 /* Runtime instruction load won't happen;
 303                  * take it all the way back down so we can try again */
 304                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
 305                 goto restart;
 306         }
 307         return;
 308
 309 restart:
 310         queue_work(priv->workqueue, &priv->restart);
 311 }
 312
 313 static int is_fat_channel(__le32 rxon_flags)
 314 {
 315         return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
 316                 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
 317 }
 318
 319 /*
 320  * EEPROM handlers
 321  */
 322 static u16 iwl4965_eeprom_calib_version(struct iwl_priv *priv)
 323 {
 324         return iwl_eeprom_query16(priv, EEPROM_4965_CALIB_VERSION_OFFSET);
 325 }
 326
 327 /*
 328  * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask
 329  * must be called under priv->lock and mac access
 330  */
 331 static void iwl4965_txq_set_sched(struct iwl_priv *priv, u32 mask)
 332 {
 333         iwl_write_prph(priv, IWL49_SCD_TXFACT, mask);
 334 }
 335
 336 static int iwl4965_apm_init(struct iwl_priv *priv)
 337 {
 338         int ret = 0;
 339
 340         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 341                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 342
 343         /* disable L0s without affecting L1 :don't wait for ICH L0s bug W/A) */
 344         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 345                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
 346
 347         /* set "initialization complete" bit to move adapter
 348          * D0U* --> D0A* state */
 349         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 350
 351         /* wait for clock stabilization */
 352         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
 353                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 354                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 355         if (ret < 0) {
 356                 IWL_DEBUG_INFO("Failed to init the card\n");
 357                 goto out;
 358         }
 359
 360         ret = iwl_grab_nic_access(priv);
 361         if (ret)
 362                 goto out;
 363
 364         /* enable DMA */
 365         iwl_write_prph(priv, APMG_CLK_CTRL_REG, APMG_CLK_VAL_DMA_CLK_RQT |
 366                                                 APMG_CLK_VAL_BSM_CLK_RQT);
 367
 368         udelay(20);
 369
 370         /* disable L1-Active */
 371         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 372                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 373
 374         iwl_release_nic_access(priv);
 375 out:
 376         return ret;
 377 }
 378
 379
 380 static void iwl4965_nic_config(struct iwl_priv *priv)
 381 {
 382         unsigned long flags;
 383         u32 val;
 384         u16 radio_cfg;
 385         u16 link;
 386
 387         spin_lock_irqsave(&priv->lock, flags);
 388
 389         if ((priv->rev_id & 0x80) == 0x80 && (priv->rev_id & 0x7f) < 8) {
 390                 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 391                 /* Enable No Snoop field */
 392                 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
 393                                        val & ~(1 << 11));
 394         }
 395
 396         pci_read_config_word(priv->pci_dev, PCI_CFG_LINK_CTRL, &link);
 397
 398         /* L1 is enabled by BIOS */
 399         if ((link & PCI_CFG_LINK_CTRL_VAL_L1_EN) == PCI_CFG_LINK_CTRL_VAL_L1_EN)
 400                 /* disable L0S disabled L1A enabled */
 401                 iwl_set_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 402         else
 403                 /* L0S enabled L1A disabled */
 404                 iwl_clear_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 405
 406         radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
 407
 408         /* write radio config values to register */
 409         if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) == EEPROM_4965_RF_CFG_TYPE_MAX)
 410                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 411                             EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
 412                             EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
 413                             EEPROM_RF_CFG_DASH_MSK(radio_cfg));
 414
 415         /* set CSR_HW_CONFIG_REG for uCode use */
 416         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 417                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 418                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
 419
 420         priv->calib_info = (struct iwl_eeprom_calib_info *)
 421                 iwl_eeprom_query_addr(priv, EEPROM_4965_CALIB_TXPOWER_OFFSET);
 422
 423         spin_unlock_irqrestore(&priv->lock, flags);
 424 }
 425
 426 static int iwl4965_apm_stop_master(struct iwl_priv *priv)
 427 {
 428         int ret = 0;
 429         unsigned long flags;
 430
 431         spin_lock_irqsave(&priv->lock, flags);
 432
 433         /* set stop master bit */
 434         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 435
 436         ret = iwl_poll_bit(priv, CSR_RESET,
 437                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
 438                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 439         if (ret < 0)
 440                 goto out;
 441
 442 out:
 443         spin_unlock_irqrestore(&priv->lock, flags);
 444         IWL_DEBUG_INFO("stop master\n");
 445
 446         return ret;
 447 }
 448
 449 static void iwl4965_apm_stop(struct iwl_priv *priv)
 450 {
 451         unsigned long flags;
 452
 453         iwl4965_apm_stop_master(priv);
 454
 455         spin_lock_irqsave(&priv->lock, flags);
 456
 457         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 458
 459         udelay(10);
 460         /* clear "init complete"  move adapter D0A* --> D0U state */
 461         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 462         spin_unlock_irqrestore(&priv->lock, flags);
 463 }
 464
 465 static int iwl4965_apm_reset(struct iwl_priv *priv)
 466 {
 467         int ret = 0;
 468         unsigned long flags;
 469
 470         iwl4965_apm_stop_master(priv);
 471
 472         spin_lock_irqsave(&priv->lock, flags);
 473
 474         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 475
 476         udelay(10);
 477
 478         /* FIXME: put here L1A -L0S w/a */
 479
 480         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 481
 482         ret = iwl_poll_bit(priv, CSR_RESET,
 483                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 484                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
 485
 486         if (ret)
 487                 goto out;
 488
 489         udelay(10);
 490
 491         ret = iwl_grab_nic_access(priv);
 492         if (ret)
 493                 goto out;
 494         /* Enable DMA and BSM Clock */
 495         iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT |
 496                                               APMG_CLK_VAL_BSM_CLK_RQT);
 497
 498         udelay(10);
 499
 500         /* disable L1A */
 501         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 502                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 503
 504         iwl_release_nic_access(priv);
 505
 506         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 507         wake_up_interruptible(&priv->wait_command_queue);
 508
 509 out:
 510         spin_unlock_irqrestore(&priv->lock, flags);
 511
 512         return ret;
 513 }
 514
 515 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
 516  * Called after every association, but this runs only once!
 517  *  ... once chain noise is calibrated the first time, it's good forever.  */
 518 static void iwl4965_chain_noise_reset(struct iwl_priv *priv)
 519 {
 520         struct iwl_chain_noise_data *data = &(priv->chain_noise_data);
 521
 522         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
 523                 struct iwl_calib_diff_gain_cmd cmd;
 524
 525                 memset(&cmd, 0, sizeof(cmd));
 526                 cmd.opCode = IWL_PHY_CALIBRATE_DIFF_GAIN_CMD;
 527                 cmd.diff_gain_a = 0;
 528                 cmd.diff_gain_b = 0;
 529                 cmd.diff_gain_c = 0;
 530                 if (iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 531                                  sizeof(cmd), &cmd))
 532                         IWL_ERROR("Could not send REPLY_PHY_CALIBRATION_CMD\n");
 533                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
 534                 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
 535         }
 536 }
 537
 538 static void iwl4965_gain_computation(struct iwl_priv *priv,
 539                 u32 *average_noise,
 540                 u16 min_average_noise_antenna_i,
 541                 u32 min_average_noise)
 542 {
 543         int i, ret;
 544         struct iwl_chain_noise_data *data = &priv->chain_noise_data;
 545
 546         data->delta_gain_code[min_average_noise_antenna_i] = 0;
 547
 548         for (i = 0; i < NUM_RX_CHAINS; i++) {
 549                 s32 delta_g = 0;
 550
 551                 if (!(data->disconn_array[i]) &&
 552                     (data->delta_gain_code[i] ==
 553                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
 554                         delta_g = average_noise[i] - min_average_noise;
 555                         data->delta_gain_code[i] = (u8)((delta_g * 10) / 15);
 556                         data->delta_gain_code[i] =
 557                                 min(data->delta_gain_code[i],
 558                                 (u8) CHAIN_NOISE_MAX_DELTA_GAIN_CODE);
 559
 560                         data->delta_gain_code[i] =
 561                                 (data->delta_gain_code[i] | (1 << 2));
 562                 } else {
 563                         data->delta_gain_code[i] = 0;
 564                 }
 565         }
 566         IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
 567                      data->delta_gain_code[0],
 568                      data->delta_gain_code[1],
 569                      data->delta_gain_code[2]);
 570
 571         /* Differential gain gets sent to uCode only once */
 572         if (!data->radio_write) {
 573                 struct iwl_calib_diff_gain_cmd cmd;
 574                 data->radio_write = 1;
 575
 576                 memset(&cmd, 0, sizeof(cmd));
 577                 cmd.opCode = IWL_PHY_CALIBRATE_DIFF_GAIN_CMD;
 578                 cmd.diff_gain_a = data->delta_gain_code[0];
 579                 cmd.diff_gain_b = data->delta_gain_code[1];
 580                 cmd.diff_gain_c = data->delta_gain_code[2];
 581                 ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 582                                       sizeof(cmd), &cmd);
 583                 if (ret)
 584                         IWL_DEBUG_CALIB("fail sending cmd "
 585                                      "REPLY_PHY_CALIBRATION_CMD \n");
 586
 587                 /* TODO we might want recalculate
 588                  * rx_chain in rxon cmd */
 589
 590                 /* Mark so we run this algo only once! */
 591                 data->state = IWL_CHAIN_NOISE_CALIBRATED;
 592         }
 593         data->chain_noise_a = 0;
 594         data->chain_noise_b = 0;
 595         data->chain_noise_c = 0;
 596         data->chain_signal_a = 0;
 597         data->chain_signal_b = 0;
 598         data->chain_signal_c = 0;
 599         data->beacon_count = 0;
 600 }
 601
 602 static void iwl4965_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 603                         __le32 *tx_flags)
 604 {
 605         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 606                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 607                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 608         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 609                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 610                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 611         }
 612 }
 613
 614 static void iwl4965_bg_txpower_work(struct work_struct *work)
 615 {
 616         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 617                         txpower_work);
 618
 619         /* If a scan happened to start before we got here
 620          * then just return; the statistics notification will
 621          * kick off another scheduled work to compensate for
 622          * any temperature delta we missed here. */
 623         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 624             test_bit(STATUS_SCANNING, &priv->status))
 625                 return;
 626
 627         mutex_lock(&priv->mutex);
 628
 629         /* Regardless of if we are associated, we must reconfigure the
 630          * TX power since frames can be sent on non-radar channels while
 631          * not associated */
 632         iwl4965_send_tx_power(priv);
 633
 634         /* Update last_temperature to keep is_calib_needed from running
 635          * when it isn't needed... */
 636         priv->last_temperature = priv->temperature;
 637
 638         mutex_unlock(&priv->mutex);
 639 }
 640
 641 /*
 642  * Acquire priv->lock before calling this function !
 643  */
 644 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
 645 {
 646         iwl_write_direct32(priv, HBUS_TARG_WRPTR,
 647                              (index & 0xff) | (txq_id << 8));
 648         iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(txq_id), index);
 649 }
 650
 651 /**
 652  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
 653  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
 654  * @scd_retry: (1) Indicates queue will be used in aggregation mode
 655  *
 656  * NOTE:  Acquire priv->lock before calling this function !
 657  */
 658 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
 659                                         struct iwl_tx_queue *txq,
 660                                         int tx_fifo_id, int scd_retry)
 661 {
 662         int txq_id = txq->q.id;
 663
 664         /* Find out whether to activate Tx queue */
 665         int active = test_bit(txq_id, &priv->txq_ctx_active_msk) ? 1 : 0;
 666
 667         /* Set up and activate */
 668         iwl_write_prph(priv, IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
 669                          (active << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
 670                          (tx_fifo_id << IWL49_SCD_QUEUE_STTS_REG_POS_TXF) |
 671                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_WSL) |
 672                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
 673                          IWL49_SCD_QUEUE_STTS_REG_MSK);
 674
 675         txq->sched_retry = scd_retry;
 676
 677         IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
 678                        active ? "Activate" : "Deactivate",
 679                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
 680 }
 681
 682 static const u16 default_queue_to_tx_fifo[] = {
 683         IWL_TX_FIFO_AC3,
 684         IWL_TX_FIFO_AC2,
 685         IWL_TX_FIFO_AC1,
 686         IWL_TX_FIFO_AC0,
 687         IWL49_CMD_FIFO_NUM,
 688         IWL_TX_FIFO_HCCA_1,
 689         IWL_TX_FIFO_HCCA_2
 690 };
 691
 692 static int iwl4965_alive_notify(struct iwl_priv *priv)
 693 {
 694         u32 a;
 695         unsigned long flags;
 696         int ret;
 697         int i, chan;
 698
 699         spin_lock_irqsave(&priv->lock, flags);
 700
 701         ret = iwl_grab_nic_access(priv);
 702         if (ret) {
 703                 spin_unlock_irqrestore(&priv->lock, flags);
 704                 return ret;
 705         }
 706
 707         /* Clear 4965's internal Tx Scheduler data base */
 708         priv->scd_base_addr = iwl_read_prph(priv, IWL49_SCD_SRAM_BASE_ADDR);
 709         a = priv->scd_base_addr + IWL49_SCD_CONTEXT_DATA_OFFSET;
 710         for (; a < priv->scd_base_addr + IWL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
 711                 iwl_write_targ_mem(priv, a, 0);
 712         for (; a < priv->scd_base_addr + IWL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
 713                 iwl_write_targ_mem(priv, a, 0);
 714         for (; a < sizeof(u16) * priv->hw_params.max_txq_num; a += 4)
 715                 iwl_write_targ_mem(priv, a, 0);
 716
 717         /* Tel 4965 where to find Tx byte count tables */
 718         iwl_write_prph(priv, IWL49_SCD_DRAM_BASE_ADDR,
 719                         priv->scd_bc_tbls.dma >> 10);
 720
 721         /* Enable DMA channel */
 722         for (chan = 0; chan < FH49_TCSR_CHNL_NUM ; chan++)
 723                 iwl_write_direct32(priv, FH_TCSR_CHNL_TX_CONFIG_REG(chan),
 724                                 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
 725                                 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE);
 726
 727         /* Disable chain mode for all queues */
 728         iwl_write_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, 0);
 729
 730         /* Initialize each Tx queue (including the command queue) */
 731         for (i = 0; i < priv->hw_params.max_txq_num; i++) {
 732
 733                 /* TFD circular buffer read/write indexes */
 734                 iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(i), 0);
 735                 iwl_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
 736
 737                 /* Max Tx Window size for Scheduler-ACK mode */
 738                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 739                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i),
 740                                 (SCD_WIN_SIZE <<
 741                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
 742                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
 743
 744                 /* Frame limit */
 745                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 746                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
 747                                 sizeof(u32),
 748                                 (SCD_FRAME_LIMIT <<
 749                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
 750                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
 751
 752         }
 753         iwl_write_prph(priv, IWL49_SCD_INTERRUPT_MASK,
 754                                  (1 << priv->hw_params.max_txq_num) - 1);
 755
 756         /* Activate all Tx DMA/FIFO channels */
 757         priv->cfg->ops->lib->txq_set_sched(priv, IWL_MASK(0, 6));
 758
 759         iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
 760
 761         /* Map each Tx/cmd queue to its corresponding fifo */
 762         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
 763                 int ac = default_queue_to_tx_fifo[i];
 764                 iwl_txq_ctx_activate(priv, i);
 765                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
 766         }
 767
 768         iwl_release_nic_access(priv);
 769         spin_unlock_irqrestore(&priv->lock, flags);
 770
 771         return ret;
 772 }
 773
 774 static struct iwl_sensitivity_ranges iwl4965_sensitivity = {
 775         .min_nrg_cck = 97,
 776         .max_nrg_cck = 0,
 777
 778         .auto_corr_min_ofdm = 85,
 779         .auto_corr_min_ofdm_mrc = 170,
 780         .auto_corr_min_ofdm_x1 = 105,
 781         .auto_corr_min_ofdm_mrc_x1 = 220,
 782
 783         .auto_corr_max_ofdm = 120,
 784         .auto_corr_max_ofdm_mrc = 210,
 785         .auto_corr_max_ofdm_x1 = 140,
 786         .auto_corr_max_ofdm_mrc_x1 = 270,
 787
 788         .auto_corr_min_cck = 125,
 789         .auto_corr_max_cck = 200,
 790         .auto_corr_min_cck_mrc = 200,
 791         .auto_corr_max_cck_mrc = 400,
 792
 793         .nrg_th_cck = 100,
 794         .nrg_th_ofdm = 100,
 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_ERROR("invalid queues_num, should be between %d and %d\n",
 808                           IWL_MIN_NUM_QUEUES, IWL49_NUM_QUEUES);
 809                 return -EINVAL;
 810         }
 811
 812         priv->hw_params.max_txq_num = priv->cfg->mod_params->num_of_queues;
 813         priv->hw_params.scd_bc_tbls_size =
 814                         IWL49_NUM_QUEUES * sizeof(struct iwl4965_scd_bc_tbl);
 815         priv->hw_params.max_stations = IWL4965_STATION_COUNT;
 816         priv->hw_params.bcast_sta_id = IWL4965_BROADCAST_ID;
 817         priv->hw_params.max_data_size = IWL49_RTC_DATA_SIZE;
 818         priv->hw_params.max_inst_size = IWL49_RTC_INST_SIZE;
 819         priv->hw_params.max_bsm_size = BSM_SRAM_SIZE;
 820         priv->hw_params.fat_channel = BIT(IEEE80211_BAND_5GHZ);
 821
 822         priv->hw_params.tx_chains_num = 2;
 823         priv->hw_params.rx_chains_num = 2;
 824         priv->hw_params.valid_tx_ant = ANT_A | ANT_B;
 825         priv->hw_params.valid_rx_ant = ANT_A | ANT_B;
 826         priv->hw_params.ct_kill_threshold = CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD);
 827
 828         priv->hw_params.sens = &iwl4965_sensitivity;
 829
 830         return 0;
 831 }
 832
 833 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
 834 {
 835         s32 sign = 1;
 836
 837         if (num < 0) {
 838                 sign = -sign;
 839                 num = -num;
 840         }
 841         if (denom < 0) {
 842                 sign = -sign;
 843                 denom = -denom;
 844         }
 845         *res = 1;
 846         *res = ((num * 2 + denom) / (denom * 2)) * sign;
 847
 848         return 1;
 849 }
 850
 851 /**
 852  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
 853  *
 854  * Determines power supply voltage compensation for txpower calculations.
 855  * Returns number of 1/2-dB steps to subtract from gain table index,
 856  * to compensate for difference between power supply voltage during
 857  * factory measurements, vs. current power supply voltage.
 858  *
 859  * Voltage indication is higher for lower voltage.
 860  * Lower voltage requires more gain (lower gain table index).
 861  */
 862 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
 863                                             s32 current_voltage)
 864 {
 865         s32 comp = 0;
 866
 867         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
 868             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
 869                 return 0;
 870
 871         iwl4965_math_div_round(current_voltage - eeprom_voltage,
 872                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
 873
 874         if (current_voltage > eeprom_voltage)
 875                 comp *= 2;
 876         if ((comp < -2) || (comp > 2))
 877                 comp = 0;
 878
 879         return comp;
 880 }
 881
 882 static s32 iwl4965_get_tx_atten_grp(u16 channel)
 883 {
 884         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
 885             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
 886                 return CALIB_CH_GROUP_5;
 887
 888         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
 889             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
 890                 return CALIB_CH_GROUP_1;
 891
 892         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
 893             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
 894                 return CALIB_CH_GROUP_2;
 895
 896         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
 897             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
 898                 return CALIB_CH_GROUP_3;
 899
 900         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
 901             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
 902                 return CALIB_CH_GROUP_4;
 903
 904         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
 905         return -1;
 906 }
 907
 908 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
 909 {
 910         s32 b = -1;
 911
 912         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
 913                 if (priv->calib_info->band_info[b].ch_from == 0)
 914                         continue;
 915
 916                 if ((channel >= priv->calib_info->band_info[b].ch_from)
 917                     && (channel <= priv->calib_info->band_info[b].ch_to))
 918                         break;
 919         }
 920
 921         return b;
 922 }
 923
 924 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
 925 {
 926         s32 val;
 927
 928         if (x2 == x1)
 929                 return y1;
 930         else {
 931                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
 932                 return val + y2;
 933         }
 934 }
 935
 936 /**
 937  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
 938  *
 939  * Interpolates factory measurements from the two sample channels within a
 940  * sub-band, to apply to channel of interest.  Interpolation is proportional to
 941  * differences in channel frequencies, which is proportional to differences
 942  * in channel number.
 943  */
 944 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
 945                                     struct iwl_eeprom_calib_ch_info *chan_info)
 946 {
 947         s32 s = -1;
 948         u32 c;
 949         u32 m;
 950         const struct iwl_eeprom_calib_measure *m1;
 951         const struct iwl_eeprom_calib_measure *m2;
 952         struct iwl_eeprom_calib_measure *omeas;
 953         u32 ch_i1;
 954         u32 ch_i2;
 955
 956         s = iwl4965_get_sub_band(priv, channel);
 957         if (s >= EEPROM_TX_POWER_BANDS) {
 958                 IWL_ERROR("Tx Power can not find channel %d\n", channel);
 959                 return -1;
 960         }
 961
 962         ch_i1 = priv->calib_info->band_info[s].ch1.ch_num;
 963         ch_i2 = priv->calib_info->band_info[s].ch2.ch_num;
 964         chan_info->ch_num = (u8) channel;
 965
 966         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
 967                           channel, s, ch_i1, ch_i2);
 968
 969         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
 970                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
 971                         m1 = &(priv->calib_info->band_info[s].ch1.
 972                                measurements[c][m]);
 973                         m2 = &(priv->calib_info->band_info[s].ch2.
 974                                measurements[c][m]);
 975                         omeas = &(chan_info->measurements[c][m]);
 976
 977                         omeas->actual_pow =
 978                             (u8) iwl4965_interpolate_value(channel, ch_i1,
 979                                                            m1->actual_pow,
 980                                                            ch_i2,
 981                                                            m2->actual_pow);
 982                         omeas->gain_idx =
 983                             (u8) iwl4965_interpolate_value(channel, ch_i1,
 984                                                            m1->gain_idx, ch_i2,
 985                                                            m2->gain_idx);
 986                         omeas->temperature =
 987                             (u8) iwl4965_interpolate_value(channel, ch_i1,
 988                                                            m1->temperature,
 989                                                            ch_i2,
 990                                                            m2->temperature);
 991                         omeas->pa_det =
 992                             (s8) iwl4965_interpolate_value(channel, ch_i1,
 993                                                            m1->pa_det, ch_i2,
 994                                                            m2->pa_det);
 995
 996                         IWL_DEBUG_TXPOWER
 997                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
 998                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
 999                         IWL_DEBUG_TXPOWER
1000                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
1001                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
1002                         IWL_DEBUG_TXPOWER
1003                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
1004                              m1->pa_det, m2->pa_det, omeas->pa_det);
1005                         IWL_DEBUG_TXPOWER
1006                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
1007                              m1->temperature, m2->temperature,
1008                              omeas->temperature);
1009                 }
1010         }
1011
1012         return 0;
1013 }
1014
1015 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
1016  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
1017 static s32 back_off_table[] = {
1018         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
1019         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
1020         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
1021         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
1022         10                      /* CCK */
1023 };
1024
1025 /* Thermal compensation values for txpower for various frequency ranges ...
1026  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
1027 static struct iwl4965_txpower_comp_entry {
1028         s32 degrees_per_05db_a;
1029         s32 degrees_per_05db_a_denom;
1030 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
1031         {9, 2},                 /* group 0 5.2, ch  34-43 */
1032         {4, 1},                 /* group 1 5.2, ch  44-70 */
1033         {4, 1},                 /* group 2 5.2, ch  71-124 */
1034         {4, 1},                 /* group 3 5.2, ch 125-200 */
1035         {3, 1}                  /* group 4 2.4, ch   all */
1036 };
1037
1038 static s32 get_min_power_index(s32 rate_power_index, u32 band)
1039 {
1040         if (!band) {
1041                 if ((rate_power_index & 7) <= 4)
1042                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
1043         }
1044         return MIN_TX_GAIN_INDEX;
1045 }
1046
1047 struct gain_entry {
1048         u8 dsp;
1049         u8 radio;
1050 };
1051
1052 static const struct gain_entry gain_table[2][108] = {
1053         /* 5.2GHz power gain index table */
1054         {
1055          {123, 0x3F},           /* highest txpower */
1056          {117, 0x3F},
1057          {110, 0x3F},
1058          {104, 0x3F},
1059          {98, 0x3F},
1060          {110, 0x3E},
1061          {104, 0x3E},
1062          {98, 0x3E},
1063          {110, 0x3D},
1064          {104, 0x3D},
1065          {98, 0x3D},
1066          {110, 0x3C},
1067          {104, 0x3C},
1068          {98, 0x3C},
1069          {110, 0x3B},
1070          {104, 0x3B},
1071          {98, 0x3B},
1072          {110, 0x3A},
1073          {104, 0x3A},
1074          {98, 0x3A},
1075          {110, 0x39},
1076          {104, 0x39},
1077          {98, 0x39},
1078          {110, 0x38},
1079          {104, 0x38},
1080          {98, 0x38},
1081          {110, 0x37},
1082          {104, 0x37},
1083          {98, 0x37},
1084          {110, 0x36},
1085          {104, 0x36},
1086          {98, 0x36},
1087          {110, 0x35},
1088          {104, 0x35},
1089          {98, 0x35},
1090          {110, 0x34},
1091          {104, 0x34},
1092          {98, 0x34},
1093          {110, 0x33},
1094          {104, 0x33},
1095          {98, 0x33},
1096          {110, 0x32},
1097          {104, 0x32},
1098          {98, 0x32},
1099          {110, 0x31},
1100          {104, 0x31},
1101          {98, 0x31},
1102          {110, 0x30},
1103          {104, 0x30},
1104          {98, 0x30},
1105          {110, 0x25},
1106          {104, 0x25},
1107          {98, 0x25},
1108          {110, 0x24},
1109          {104, 0x24},
1110          {98, 0x24},
1111          {110, 0x23},
1112          {104, 0x23},
1113          {98, 0x23},
1114          {110, 0x22},
1115          {104, 0x18},
1116          {98, 0x18},
1117          {110, 0x17},
1118          {104, 0x17},
1119          {98, 0x17},
1120          {110, 0x16},
1121          {104, 0x16},
1122          {98, 0x16},
1123          {110, 0x15},
1124          {104, 0x15},
1125          {98, 0x15},
1126          {110, 0x14},
1127          {104, 0x14},
1128          {98, 0x14},
1129          {110, 0x13},
1130          {104, 0x13},
1131          {98, 0x13},
1132          {110, 0x12},
1133          {104, 0x08},
1134          {98, 0x08},
1135          {110, 0x07},
1136          {104, 0x07},
1137          {98, 0x07},
1138          {110, 0x06},
1139          {104, 0x06},
1140          {98, 0x06},
1141          {110, 0x05},
1142          {104, 0x05},
1143          {98, 0x05},
1144          {110, 0x04},
1145          {104, 0x04},
1146          {98, 0x04},
1147          {110, 0x03},
1148          {104, 0x03},
1149          {98, 0x03},
1150          {110, 0x02},
1151          {104, 0x02},
1152          {98, 0x02},
1153          {110, 0x01},
1154          {104, 0x01},
1155          {98, 0x01},
1156          {110, 0x00},
1157          {104, 0x00},
1158          {98, 0x00},
1159          {93, 0x00},
1160          {88, 0x00},
1161          {83, 0x00},
1162          {78, 0x00},
1163          },
1164         /* 2.4GHz power gain index table */
1165         {
1166          {110, 0x3f},           /* highest txpower */
1167          {104, 0x3f},
1168          {98, 0x3f},
1169          {110, 0x3e},
1170          {104, 0x3e},
1171          {98, 0x3e},
1172          {110, 0x3d},
1173          {104, 0x3d},
1174          {98, 0x3d},
1175          {110, 0x3c},
1176          {104, 0x3c},
1177          {98, 0x3c},
1178          {110, 0x3b},
1179          {104, 0x3b},
1180          {98, 0x3b},
1181          {110, 0x3a},
1182          {104, 0x3a},
1183          {98, 0x3a},
1184          {110, 0x39},
1185          {104, 0x39},
1186          {98, 0x39},
1187          {110, 0x38},
1188          {104, 0x38},
1189          {98, 0x38},
1190          {110, 0x37},
1191          {104, 0x37},
1192          {98, 0x37},
1193          {110, 0x36},
1194          {104, 0x36},
1195          {98, 0x36},
1196          {110, 0x35},
1197          {104, 0x35},
1198          {98, 0x35},
1199          {110, 0x34},
1200          {104, 0x34},
1201          {98, 0x34},
1202          {110, 0x33},
1203          {104, 0x33},
1204          {98, 0x33},
1205          {110, 0x32},
1206          {104, 0x32},
1207          {98, 0x32},
1208          {110, 0x31},
1209          {104, 0x31},
1210          {98, 0x31},
1211          {110, 0x30},
1212          {104, 0x30},
1213          {98, 0x30},
1214          {110, 0x6},
1215          {104, 0x6},
1216          {98, 0x6},
1217          {110, 0x5},
1218          {104, 0x5},
1219          {98, 0x5},
1220          {110, 0x4},
1221          {104, 0x4},
1222          {98, 0x4},
1223          {110, 0x3},
1224          {104, 0x3},
1225          {98, 0x3},
1226          {110, 0x2},
1227          {104, 0x2},
1228          {98, 0x2},
1229          {110, 0x1},
1230          {104, 0x1},
1231          {98, 0x1},
1232          {110, 0x0},
1233          {104, 0x0},
1234          {98, 0x0},
1235          {97, 0},
1236          {96, 0},
1237          {95, 0},
1238          {94, 0},
1239          {93, 0},
1240          {92, 0},
1241          {91, 0},
1242          {90, 0},
1243          {89, 0},
1244          {88, 0},
1245          {87, 0},
1246          {86, 0},
1247          {85, 0},
1248          {84, 0},
1249          {83, 0},
1250          {82, 0},
1251          {81, 0},
1252          {80, 0},
1253          {79, 0},
1254          {78, 0},
1255          {77, 0},
1256          {76, 0},
1257          {75, 0},
1258          {74, 0},
1259          {73, 0},
1260          {72, 0},
1261          {71, 0},
1262          {70, 0},
1263          {69, 0},
1264          {68, 0},
1265          {67, 0},
1266          {66, 0},
1267          {65, 0},
1268          {64, 0},
1269          {63, 0},
1270          {62, 0},
1271          {61, 0},
1272          {60, 0},
1273          {59, 0},
1274          }
1275 };
1276
1277 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
1278                                     u8 is_fat, u8 ctrl_chan_high,
1279                                     struct iwl4965_tx_power_db *tx_power_tbl)
1280 {
1281         u8 saturation_power;
1282         s32 target_power;
1283         s32 user_target_power;
1284         s32 power_limit;
1285         s32 current_temp;
1286         s32 reg_limit;
1287         s32 current_regulatory;
1288         s32 txatten_grp = CALIB_CH_GROUP_MAX;
1289         int i;
1290         int c;
1291         const struct iwl_channel_info *ch_info = NULL;
1292         struct iwl_eeprom_calib_ch_info ch_eeprom_info;
1293         const struct iwl_eeprom_calib_measure *measurement;
1294         s16 voltage;
1295         s32 init_voltage;
1296         s32 voltage_compensation;
1297         s32 degrees_per_05db_num;
1298         s32 degrees_per_05db_denom;
1299         s32 factory_temp;
1300         s32 temperature_comp[2];
1301         s32 factory_gain_index[2];
1302         s32 factory_actual_pwr[2];
1303         s32 power_index;
1304
1305         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
1306          *   are used for indexing into txpower table) */
1307         user_target_power = 2 * priv->tx_power_user_lmt;
1308
1309         /* Get current (RXON) channel, band, width */
1310         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
1311                           is_fat);
1312
1313         ch_info = iwl_get_channel_info(priv, priv->band, channel);
1314
1315         if (!is_channel_valid(ch_info))
1316                 return -EINVAL;
1317
1318         /* get txatten group, used to select 1) thermal txpower adjustment
1319          *   and 2) mimo txpower balance between Tx chains. */
1320         txatten_grp = iwl4965_get_tx_atten_grp(channel);
1321         if (txatten_grp < 0)
1322                 return -EINVAL;
1323
1324         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
1325                           channel, txatten_grp);
1326
1327         if (is_fat) {
1328                 if (ctrl_chan_high)
1329                         channel -= 2;
1330                 else
1331                         channel += 2;
1332         }
1333
1334         /* hardware txpower limits ...
1335          * saturation (clipping distortion) txpowers are in half-dBm */
1336         if (band)
1337                 saturation_power = priv->calib_info->saturation_power24;
1338         else
1339                 saturation_power = priv->calib_info->saturation_power52;
1340
1341         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
1342             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
1343                 if (band)
1344                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
1345                 else
1346                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
1347         }
1348
1349         /* regulatory txpower limits ... reg_limit values are in half-dBm,
1350          *   max_power_avg values are in dBm, convert * 2 */
1351         if (is_fat)
1352                 reg_limit = ch_info->fat_max_power_avg * 2;
1353         else
1354                 reg_limit = ch_info->max_power_avg * 2;
1355
1356         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
1357             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
1358                 if (band)
1359                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
1360                 else
1361                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
1362         }
1363
1364         /* Interpolate txpower calibration values for this channel,
1365          *   based on factory calibration tests on spaced channels. */
1366         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
1367
1368         /* calculate tx gain adjustment based on power supply voltage */
1369         voltage = priv->calib_info->voltage;
1370         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
1371         voltage_compensation =
1372             iwl4965_get_voltage_compensation(voltage, init_voltage);
1373
1374         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
1375                           init_voltage,
1376                           voltage, voltage_compensation);
1377
1378         /* get current temperature (Celsius) */
1379         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
1380         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
1381         current_temp = KELVIN_TO_CELSIUS(current_temp);
1382
1383         /* select thermal txpower adjustment params, based on channel group
1384          *   (same frequency group used for mimo txatten adjustment) */
1385         degrees_per_05db_num =
1386             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
1387         degrees_per_05db_denom =
1388             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
1389
1390         /* get per-chain txpower values from factory measurements */
1391         for (c = 0; c < 2; c++) {
1392                 measurement = &ch_eeprom_info.measurements[c][1];
1393
1394                 /* txgain adjustment (in half-dB steps) based on difference
1395                  *   between factory and current temperature */
1396                 factory_temp = measurement->temperature;
1397                 iwl4965_math_div_round((current_temp - factory_temp) *
1398                                        degrees_per_05db_denom,
1399                                        degrees_per_05db_num,
1400                                        &temperature_comp[c]);
1401
1402                 factory_gain_index[c] = measurement->gain_idx;
1403                 factory_actual_pwr[c] = measurement->actual_pow;
1404
1405                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
1406                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
1407                                   "curr tmp %d, comp %d steps\n",
1408                                   factory_temp, current_temp,
1409                                   temperature_comp[c]);
1410
1411                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
1412                                   factory_gain_index[c],
1413                                   factory_actual_pwr[c]);
1414         }
1415
1416         /* for each of 33 bit-rates (including 1 for CCK) */
1417         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
1418                 u8 is_mimo_rate;
1419                 union iwl4965_tx_power_dual_stream tx_power;
1420
1421                 /* for mimo, reduce each chain's txpower by half
1422                  * (3dB, 6 steps), so total output power is regulatory
1423                  * compliant. */
1424                 if (i & 0x8) {
1425                         current_regulatory = reg_limit -
1426                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
1427                         is_mimo_rate = 1;
1428                 } else {
1429                         current_regulatory = reg_limit;
1430                         is_mimo_rate = 0;
1431                 }
1432
1433                 /* find txpower limit, either hardware or regulatory */
1434                 power_limit = saturation_power - back_off_table[i];
1435                 if (power_limit > current_regulatory)
1436                         power_limit = current_regulatory;
1437
1438                 /* reduce user's txpower request if necessary
1439                  * for this rate on this channel */
1440                 target_power = user_target_power;
1441                 if (target_power > power_limit)
1442                         target_power = power_limit;
1443
1444                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
1445                                   i, saturation_power - back_off_table[i],
1446                                   current_regulatory, user_target_power,
1447                                   target_power);
1448
1449                 /* for each of 2 Tx chains (radio transmitters) */
1450                 for (c = 0; c < 2; c++) {
1451                         s32 atten_value;
1452
1453                         if (is_mimo_rate)
1454                                 atten_value =
1455                                     (s32)le32_to_cpu(priv->card_alive_init.
1456                                     tx_atten[txatten_grp][c]);
1457                         else
1458                                 atten_value = 0;
1459
1460                         /* calculate index; higher index means lower txpower */
1461                         power_index = (u8) (factory_gain_index[c] -
1462                                             (target_power -
1463                                              factory_actual_pwr[c]) -
1464                                             temperature_comp[c] -
1465                                             voltage_compensation +
1466                                             atten_value);
1467
1468 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
1469                                                 power_index); */
1470
1471                         if (power_index < get_min_power_index(i, band))
1472                                 power_index = get_min_power_index(i, band);
1473
1474                         /* adjust 5 GHz index to support negative indexes */
1475                         if (!band)
1476                                 power_index += 9;
1477
1478                         /* CCK, rate 32, reduce txpower for CCK */
1479                         if (i == POWER_TABLE_CCK_ENTRY)
1480                                 power_index +=
1481                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
1482
1483                         /* stay within the table! */
1484                         if (power_index > 107) {
1485                                 IWL_WARNING("txpower index %d > 107\n",
1486                                             power_index);
1487                                 power_index = 107;
1488                         }
1489                         if (power_index < 0) {
1490                                 IWL_WARNING("txpower index %d < 0\n",
1491                                             power_index);
1492                                 power_index = 0;
1493                         }
1494
1495                         /* fill txpower command for this rate/chain */
1496                         tx_power.s.radio_tx_gain[c] =
1497                                 gain_table[band][power_index].radio;
1498                         tx_power.s.dsp_predis_atten[c] =
1499                                 gain_table[band][power_index].dsp;
1500
1501                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
1502                                           "gain 0x%02x dsp %d\n",
1503                                           c, atten_value, power_index,
1504                                         tx_power.s.radio_tx_gain[c],
1505                                         tx_power.s.dsp_predis_atten[c]);
1506                 } /* for each chain */
1507
1508                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
1509
1510         } /* for each rate */
1511
1512         return 0;
1513 }
1514
1515 /**
1516  * iwl4965_send_tx_power - Configure the TXPOWER level user limit
1517  *
1518  * Uses the active RXON for channel, band, and characteristics (fat, high)
1519  * The power limit is taken from priv->tx_power_user_lmt.
1520  */
1521 static int iwl4965_send_tx_power(struct iwl_priv *priv)
1522 {
1523         struct iwl4965_txpowertable_cmd cmd = { 0 };
1524         int ret;
1525         u8 band = 0;
1526         u8 is_fat = 0;
1527         u8 ctrl_chan_high = 0;
1528
1529         if (test_bit(STATUS_SCANNING, &priv->status)) {
1530                 /* If this gets hit a lot, switch it to a BUG() and catch
1531                  * the stack trace to find out who is calling this during
1532                  * a scan. */
1533                 IWL_WARNING("TX Power requested while scanning!\n");
1534                 return -EAGAIN;
1535         }
1536
1537         band = priv->band == IEEE80211_BAND_2GHZ;
1538
1539         is_fat =  is_fat_channel(priv->active_rxon.flags);
1540
1541         if (is_fat &&
1542             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1543                 ctrl_chan_high = 1;
1544
1545         cmd.band = band;
1546         cmd.channel = priv->active_rxon.channel;
1547
1548         ret = iwl4965_fill_txpower_tbl(priv, band,
1549                                 le16_to_cpu(priv->active_rxon.channel),
1550                                 is_fat, ctrl_chan_high, &cmd.tx_power);
1551         if (ret)
1552                 goto out;
1553
1554         ret = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
1555
1556 out:
1557         return ret;
1558 }
1559
1560 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
1561 {
1562         int ret = 0;
1563         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1564         const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1565         const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1566
1567         if ((rxon1->flags == rxon2->flags) &&
1568             (rxon1->filter_flags == rxon2->filter_flags) &&
1569             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1570             (rxon1->ofdm_ht_single_stream_basic_rates ==
1571              rxon2->ofdm_ht_single_stream_basic_rates) &&
1572             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1573              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1574             (rxon1->rx_chain == rxon2->rx_chain) &&
1575             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1576                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1577                 return 0;
1578         }
1579
1580         rxon_assoc.flags = priv->staging_rxon.flags;
1581         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1582         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1583         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1584         rxon_assoc.reserved = 0;
1585         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1586             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1587         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1588             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1589         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1590
1591         ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
1592                                      sizeof(rxon_assoc), &rxon_assoc, NULL);
1593         if (ret)
1594                 return ret;
1595
1596         return ret;
1597 }
1598
1599 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
1600 static int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
1601 {
1602         int rc;
1603         u8 band = 0;
1604         u8 is_fat = 0;
1605         u8 ctrl_chan_high = 0;
1606         struct iwl4965_channel_switch_cmd cmd = { 0 };
1607         const struct iwl_channel_info *ch_info;
1608
1609         band = priv->band == IEEE80211_BAND_2GHZ;
1610
1611         ch_info = iwl_get_channel_info(priv, priv->band, channel);
1612
1613         is_fat = is_fat_channel(priv->staging_rxon.flags);
1614
1615         if (is_fat &&
1616             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1617                 ctrl_chan_high = 1;
1618
1619         cmd.band = band;
1620         cmd.expect_beacon = 0;
1621         cmd.channel = cpu_to_le16(channel);
1622         cmd.rxon_flags = priv->active_rxon.flags;
1623         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
1624         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
1625         if (ch_info)
1626                 cmd.expect_beacon = is_channel_radar(ch_info);
1627         else
1628                 cmd.expect_beacon = 1;
1629
1630         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
1631                                       ctrl_chan_high, &cmd.tx_power);
1632         if (rc) {
1633                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
1634                 return rc;
1635         }
1636
1637         rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
1638         return rc;
1639 }
1640 #endif
1641
1642 /**
1643  * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
1644  */
1645 static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
1646                                             struct iwl_tx_queue *txq,
1647                                             u16 byte_cnt)
1648 {
1649         struct iwl4965_scd_bc_tbl *scd_bc_tbl = priv->scd_bc_tbls.addr;
1650         int txq_id = txq->q.id;
1651         int write_ptr = txq->q.write_ptr;
1652         int len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
1653         __le16 bc_ent;
1654
1655         WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX);
1656
1657         bc_ent = cpu_to_le16(len & 0xFFF);
1658         /* Set up byte count within first 256 entries */
1659         scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent;
1660
1661         /* If within first 64 entries, duplicate at end */
1662         if (write_ptr < TFD_QUEUE_SIZE_BC_DUP)
1663                 scd_bc_tbl[txq_id].
1664                         tfd_offset[TFD_QUEUE_SIZE_MAX + write_ptr] = bc_ent;
1665 }
1666
1667 /**
1668  * sign_extend - Sign extend a value using specified bit as sign-bit
1669  *
1670  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
1671  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
1672  *
1673  * @param oper value to sign extend
1674  * @param index 0 based bit index (0<=index<32) to sign bit
1675  */
1676 static s32 sign_extend(u32 oper, int index)
1677 {
1678         u8 shift = 31 - index;
1679
1680         return (s32)(oper << shift) >> shift;
1681 }
1682
1683 /**
1684  * iwl4965_hw_get_temperature - return the calibrated temperature (in Kelvin)
1685  * @statistics: Provides the temperature reading from the uCode
1686  *
1687  * A return of <0 indicates bogus data in the statistics
1688  */
1689 static int iwl4965_hw_get_temperature(const struct iwl_priv *priv)
1690 {
1691         s32 temperature;
1692         s32 vt;
1693         s32 R1, R2, R3;
1694         u32 R4;
1695
1696         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
1697                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
1698                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
1699                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
1700                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
1701                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
1702                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
1703         } else {
1704                 IWL_DEBUG_TEMP("Running temperature calibration\n");
1705                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
1706                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
1707                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
1708                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
1709         }
1710
1711         /*
1712          * Temperature is only 23 bits, so sign extend out to 32.
1713          *
1714          * NOTE If we haven't received a statistics notification yet
1715          * with an updated temperature, use R4 provided to us in the
1716          * "initialize" ALIVE response.
1717          */
1718         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
1719                 vt = sign_extend(R4, 23);
1720         else
1721                 vt = sign_extend(
1722                         le32_to_cpu(priv->statistics.general.temperature), 23);
1723
1724         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n", R1, R2, R3, vt);
1725
1726         if (R3 == R1) {
1727                 IWL_ERROR("Calibration conflict R1 == R3\n");
1728                 return -1;
1729         }
1730
1731         /* Calculate temperature in degrees Kelvin, adjust by 97%.
1732          * Add offset to center the adjustment around 0 degrees Centigrade. */
1733         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
1734         temperature /= (R3 - R1);
1735         temperature = (temperature * 97) / 100 + TEMPERATURE_CALIB_KELVIN_OFFSET;
1736
1737         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n",
1738                         temperature, KELVIN_TO_CELSIUS(temperature));
1739
1740         return temperature;
1741 }
1742
1743 /* Adjust Txpower only if temperature variance is greater than threshold. */
1744 #define IWL_TEMPERATURE_THRESHOLD   3
1745
1746 /**
1747  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
1748  *
1749  * If the temperature changed has changed sufficiently, then a recalibration
1750  * is needed.
1751  *
1752  * Assumes caller will replace priv->last_temperature once calibration
1753  * executed.
1754  */
1755 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
1756 {
1757         int temp_diff;
1758
1759         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
1760                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
1761                 return 0;
1762         }
1763
1764         temp_diff = priv->temperature - priv->last_temperature;
1765
1766         /* get absolute value */
1767         if (temp_diff < 0) {
1768                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
1769                 temp_diff = -temp_diff;
1770         } else if (temp_diff == 0)
1771                 IWL_DEBUG_POWER("Same temp, \n");
1772         else
1773                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
1774
1775         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
1776                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
1777                 return 0;
1778         }
1779
1780         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
1781
1782         return 1;
1783 }
1784
1785 static void iwl4965_temperature_calib(struct iwl_priv *priv)
1786 {
1787         s32 temp;
1788
1789         temp = iwl4965_hw_get_temperature(priv);
1790         if (temp < 0)
1791                 return;
1792
1793         if (priv->temperature != temp) {
1794                 if (priv->temperature)
1795                         IWL_DEBUG_TEMP("Temperature changed "
1796                                        "from %dC to %dC\n",
1797                                        KELVIN_TO_CELSIUS(priv->temperature),
1798                                        KELVIN_TO_CELSIUS(temp));
1799                 else
1800                         IWL_DEBUG_TEMP("Temperature "
1801                                        "initialized to %dC\n",
1802                                        KELVIN_TO_CELSIUS(temp));
1803         }
1804
1805         priv->temperature = temp;
1806         set_bit(STATUS_TEMPERATURE, &priv->status);
1807
1808         if (!priv->disable_tx_power_cal &&
1809              unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
1810              iwl4965_is_temp_calib_needed(priv))
1811                 queue_work(priv->workqueue, &priv->txpower_work);
1812 }
1813
1814 /**
1815  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
1816  */
1817 static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
1818                                             u16 txq_id)
1819 {
1820         /* Simply stop the queue, but don't change any configuration;
1821          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
1822         iwl_write_prph(priv,
1823                 IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
1824                 (0 << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE)|
1825                 (1 << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
1826 }
1827
1828 /**
1829  * txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE
1830  * priv->lock must be held by the caller
1831  */
1832 static int iwl4965_txq_agg_disable(struct iwl_priv *priv, u16 txq_id,
1833                                    u16 ssn_idx, u8 tx_fifo)
1834 {
1835         int ret = 0;
1836
1837         if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
1838             (IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES <= txq_id)) {
1839                 IWL_WARNING("queue number out of range: %d, must be %d to %d\n",
1840                         txq_id, IWL49_FIRST_AMPDU_QUEUE,
1841                         IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES - 1);
1842                 return -EINVAL;
1843         }
1844
1845         ret = iwl_grab_nic_access(priv);
1846         if (ret)
1847                 return ret;
1848
1849         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
1850
1851         iwl_clear_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
1852
1853         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
1854         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
1855         /* supposes that ssn_idx is valid (!= 0xFFF) */
1856         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
1857
1858         iwl_clear_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
1859         iwl_txq_ctx_deactivate(priv, txq_id);
1860         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
1861
1862         iwl_release_nic_access(priv);
1863
1864         return 0;
1865 }
1866
1867 /**
1868  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
1869  */
1870 static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
1871                                         u16 txq_id)
1872 {
1873         u32 tbl_dw_addr;
1874         u32 tbl_dw;
1875         u16 scd_q2ratid;
1876
1877         scd_q2ratid = ra_tid & IWL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
1878
1879         tbl_dw_addr = priv->scd_base_addr +
1880                         IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
1881
1882         tbl_dw = iwl_read_targ_mem(priv, tbl_dw_addr);
1883
1884         if (txq_id & 0x1)
1885                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
1886         else
1887                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
1888
1889         iwl_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
1890
1891         return 0;
1892 }
1893
1894
1895 /**
1896  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
1897  *
1898  * NOTE:  txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE,
1899  *        i.e. it must be one of the higher queues used for aggregation
1900  */
1901 static int iwl4965_txq_agg_enable(struct iwl_priv *priv, int txq_id,
1902                                   int tx_fifo, int sta_id, int tid, u16 ssn_idx)
1903 {
1904         unsigned long flags;
1905         int ret;
1906         u16 ra_tid;
1907
1908         if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
1909             (IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES <= txq_id)) {
1910                 IWL_WARNING("queue number out of range: %d, must be %d to %d\n",
1911                         txq_id, IWL49_FIRST_AMPDU_QUEUE,
1912                         IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES - 1);
1913                 return -EINVAL;
1914         }
1915
1916         ra_tid = BUILD_RAxTID(sta_id, tid);
1917
1918         /* Modify device's station table to Tx this TID */
1919         iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
1920
1921         spin_lock_irqsave(&priv->lock, flags);
1922         ret = iwl_grab_nic_access(priv);
1923         if (ret) {
1924                 spin_unlock_irqrestore(&priv->lock, flags);
1925                 return ret;
1926         }
1927
1928         /* Stop this Tx queue before configuring it */
1929         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
1930
1931         /* Map receiver-address / traffic-ID to this queue */
1932         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
1933
1934         /* Set this queue as a chain-building queue */
1935         iwl_set_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
1936
1937         /* Place first TFD at index corresponding to start sequence number.
1938          * Assumes that ssn_idx is valid (!= 0xFFF) */
1939         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
1940         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
1941         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
1942
1943         /* Set up Tx window size and frame limit for this queue */
1944         iwl_write_targ_mem(priv,
1945                 priv->scd_base_addr + IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
1946                 (SCD_WIN_SIZE << IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1947                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1948
1949         iwl_write_targ_mem(priv, priv->scd_base_addr +
1950                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
1951                 (SCD_FRAME_LIMIT << IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
1952                 & IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1953
1954         iwl_set_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
1955
1956         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
1957         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
1958
1959         iwl_release_nic_access(priv);
1960         spin_unlock_irqrestore(&priv->lock, flags);
1961
1962         return 0;
1963 }
1964
1965
1966 static u16 iwl4965_get_hcmd_size(u8 cmd_id, u16 len)
1967 {
1968         switch (cmd_id) {
1969         case REPLY_RXON:
1970                 return (u16) sizeof(struct iwl4965_rxon_cmd);
1971         default:
1972                 return len;
1973         }
1974 }
1975
1976 static u16 iwl4965_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
1977 {
1978         struct iwl4965_addsta_cmd *addsta = (struct iwl4965_addsta_cmd *)data;
1979         addsta->mode = cmd->mode;
1980         memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
1981         memcpy(&addsta->key, &cmd->key, sizeof(struct iwl4965_keyinfo));
1982         addsta->station_flags = cmd->station_flags;
1983         addsta->station_flags_msk = cmd->station_flags_msk;
1984         addsta->tid_disable_tx = cmd->tid_disable_tx;
1985         addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
1986         addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
1987         addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
1988         addsta->reserved1 = __constant_cpu_to_le16(0);
1989         addsta->reserved2 = __constant_cpu_to_le32(0);
1990
1991         return (u16)sizeof(struct iwl4965_addsta_cmd);
1992 }
1993
1994 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
1995 {
1996         return le32_to_cpup(&tx_resp->u.status + tx_resp->frame_count) & MAX_SN;
1997 }
1998
1999 /**
2000  * iwl4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue
2001  */
2002 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2003                                       struct iwl_ht_agg *agg,
2004                                       struct iwl4965_tx_resp *tx_resp,
2005                                       int txq_id, u16 start_idx)
2006 {
2007         u16 status;
2008         struct agg_tx_status *frame_status = tx_resp->u.agg_status;
2009         struct ieee80211_tx_info *info = NULL;
2010         struct ieee80211_hdr *hdr = NULL;
2011         u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2012         int i, sh, idx;
2013         u16 seq;
2014         if (agg->wait_for_ba)
2015                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2016
2017         agg->frame_count = tx_resp->frame_count;
2018         agg->start_idx = start_idx;
2019         agg->rate_n_flags = rate_n_flags;
2020         agg->bitmap = 0;
2021
2022         /* num frames attempted by Tx command */
2023         if (agg->frame_count == 1) {
2024                 /* Only one frame was attempted; no block-ack will arrive */
2025                 status = le16_to_cpu(frame_status[0].status);
2026                 idx = start_idx;
2027
2028                 /* FIXME: code repetition */
2029                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2030                                    agg->frame_count, agg->start_idx, idx);
2031
2032                 info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb[0]);
2033                 info->status.rates[0].count = tx_resp->failure_frame + 1;
2034                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
2035                 info->flags |= iwl_is_tx_success(status) ?
2036                         IEEE80211_TX_STAT_ACK : 0;
2037                 iwl_hwrate_to_tx_control(priv, rate_n_flags, info);
2038                 /* FIXME: code repetition end */
2039
2040                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2041                                     status & 0xff, tx_resp->failure_frame);
2042                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n", rate_n_flags);
2043
2044                 agg->wait_for_ba = 0;
2045         } else {
2046                 /* Two or more frames were attempted; expect block-ack */
2047                 u64 bitmap = 0;
2048                 int start = agg->start_idx;
2049
2050                 /* Construct bit-map of pending frames within Tx window */
2051                 for (i = 0; i < agg->frame_count; i++) {
2052                         u16 sc;
2053                         status = le16_to_cpu(frame_status[i].status);
2054                         seq  = le16_to_cpu(frame_status[i].sequence);
2055                         idx = SEQ_TO_INDEX(seq);
2056                         txq_id = SEQ_TO_QUEUE(seq);
2057
2058                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2059                                       AGG_TX_STATE_ABORT_MSK))
2060                                 continue;
2061
2062                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2063                                            agg->frame_count, txq_id, idx);
2064
2065                         hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
2066
2067                         sc = le16_to_cpu(hdr->seq_ctrl);
2068                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2069                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
2070                                           " idx=%d, seq_idx=%d, seq=%d\n",
2071                                           idx, SEQ_TO_SN(sc),
2072                                           hdr->seq_ctrl);
2073                                 return -1;
2074                         }
2075
2076                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2077                                            i, idx, SEQ_TO_SN(sc));
2078
2079                         sh = idx - start;
2080                         if (sh > 64) {
2081                                 sh = (start - idx) + 0xff;
2082                                 bitmap = bitmap << sh;
2083                                 sh = 0;
2084                                 start = idx;
2085                         } else if (sh < -64)
2086                                 sh  = 0xff - (start - idx);
2087                         else if (sh < 0) {
2088                                 sh = start - idx;
2089                                 start = idx;
2090                                 bitmap = bitmap << sh;
2091                                 sh = 0;
2092                         }
2093                         bitmap |= 1ULL << sh;
2094                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%llx\n",
2095                                            start, (unsigned long long)bitmap);
2096                 }
2097
2098                 agg->bitmap = bitmap;
2099                 agg->start_idx = start;
2100                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2101                                    agg->frame_count, agg->start_idx,
2102                                    (unsigned long long)agg->bitmap);
2103
2104                 if (bitmap)
2105                         agg->wait_for_ba = 1;
2106         }
2107         return 0;
2108 }
2109
2110 /**
2111  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2112  */
2113 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2114                                 struct iwl_rx_mem_buffer *rxb)
2115 {
2116         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2117         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2118         int txq_id = SEQ_TO_QUEUE(sequence);
2119         int index = SEQ_TO_INDEX(sequence);
2120         struct iwl_tx_queue *txq = &priv->txq[txq_id];
2121         struct ieee80211_hdr *hdr;
2122         struct ieee80211_tx_info *info;
2123         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2124         u32  status = le32_to_cpu(tx_resp->u.status);
2125         int tid = MAX_TID_COUNT;
2126         int sta_id;
2127         int freed;
2128         u8 *qc = NULL;
2129
2130         if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
2131                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2132                           "is out of range [0-%d] %d %d\n", txq_id,
2133                           index, txq->q.n_bd, txq->q.write_ptr,
2134                           txq->q.read_ptr);
2135                 return;
2136         }
2137
2138         info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]);
2139         memset(&info->status, 0, sizeof(info->status));
2140
2141         hdr = iwl_tx_queue_get_hdr(priv, txq_id, index);
2142         if (ieee80211_is_data_qos(hdr->frame_control)) {
2143                 qc = ieee80211_get_qos_ctl(hdr);
2144                 tid = qc[0] & 0xf;
2145         }
2146
2147         sta_id = iwl_get_ra_sta_id(priv, hdr);
2148         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2149                 IWL_ERROR("Station not known\n");
2150                 return;
2151         }
2152
2153         if (txq->sched_retry) {
2154                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2155                 struct iwl_ht_agg *agg = NULL;
2156
2157                 WARN_ON(!qc);
2158
2159                 agg = &priv->stations[sta_id].tid[tid].agg;
2160
2161                 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
2162
2163                 /* check if BAR is needed */
2164                 if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status))
2165                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
2166
2167                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2168                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2169                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
2170                                            "%d index %d\n", scd_ssn , index);
2171                         freed = iwl_tx_queue_reclaim(priv, txq_id, index);
2172                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2173
2174                         if (priv->mac80211_registered &&
2175                             (iwl_queue_space(&txq->q) > txq->q.low_mark) &&
2176                             (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)) {
2177                                 if (agg->state == IWL_AGG_OFF)
2178                                         ieee80211_wake_queue(priv->hw, txq_id);
2179                                 else
2180                                         ieee80211_wake_queue(priv->hw,
2181                                                              txq->swq_id);
2182                         }
2183                 }
2184         } else {
2185                 info->status.rates[0].count = tx_resp->failure_frame + 1;
2186                 info->flags |= iwl_is_tx_success(status) ?
2187                                         IEEE80211_TX_STAT_ACK : 0;
2188                 iwl_hwrate_to_tx_control(priv,
2189                                         le32_to_cpu(tx_resp->rate_n_flags),
2190                                         info);
2191
2192                 IWL_DEBUG_TX_REPLY("TXQ %d status %s (0x%08x) "
2193                                    "rate_n_flags 0x%x retries %d\n",
2194                                    txq_id,
2195                                    iwl_get_tx_fail_reason(status), status,
2196                                    le32_to_cpu(tx_resp->rate_n_flags),
2197                                    tx_resp->failure_frame);
2198
2199                 freed = iwl_tx_queue_reclaim(priv, txq_id, index);
2200                 if (qc && likely(sta_id != IWL_INVALID_STATION))
2201                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2202
2203                 if (priv->mac80211_registered &&
2204                     (iwl_queue_space(&txq->q) > txq->q.low_mark))
2205                         ieee80211_wake_queue(priv->hw, txq_id);
2206         }
2207
2208         if (qc && likely(sta_id != IWL_INVALID_STATION))
2209                 iwl_txq_check_empty(priv, sta_id, tid, txq_id);
2210
2211         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
2212                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
2213 }
2214
2215 static int iwl4965_calc_rssi(struct iwl_priv *priv,
2216                              struct iwl_rx_phy_res *rx_resp)
2217 {
2218         /* data from PHY/DSP regarding signal strength, etc.,
2219          *   contents are always there, not configurable by host.  */
2220         struct iwl4965_rx_non_cfg_phy *ncphy =
2221             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
2222         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL49_AGC_DB_MASK)
2223                         >> IWL49_AGC_DB_POS;
2224
2225         u32 valid_antennae =
2226             (le16_to_cpu(rx_resp->phy_flags) & IWL49_RX_PHY_FLAGS_ANTENNAE_MASK)
2227                         >> IWL49_RX_PHY_FLAGS_ANTENNAE_OFFSET;
2228         u8 max_rssi = 0;
2229         u32 i;
2230
2231         /* Find max rssi among 3 possible receivers.
2232          * These values are measured by the digital signal processor (DSP).
2233          * They should stay fairly constant even as the signal strength varies,
2234          *   if the radio's automatic gain control (AGC) is working right.
2235          * AGC value (see below) will provide the "interesting" info. */
2236         for (i = 0; i < 3; i++)
2237                 if (valid_antennae & (1 << i))
2238                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
2239
2240         IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
2241                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
2242                 max_rssi, agc);
2243
2244         /* dBm = max_rssi dB - agc dB - constant.
2245          * Higher AGC (higher radio gain) means lower signal. */
2246         return max_rssi - agc - IWL_RSSI_OFFSET;
2247 }
2248
2249
2250 /* Set up 4965-specific Rx frame reply handlers */
2251 static void iwl4965_rx_handler_setup(struct iwl_priv *priv)
2252 {
2253         /* Legacy Rx frames */
2254         priv->rx_handlers[REPLY_RX] = iwl_rx_reply_rx;
2255         /* Tx response */
2256         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
2257 }
2258
2259 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
2260 {
2261         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
2262 }
2263
2264 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
2265 {
2266         cancel_work_sync(&priv->txpower_work);
2267 }
2268
2269
2270 static struct iwl_hcmd_ops iwl4965_hcmd = {
2271         .rxon_assoc = iwl4965_send_rxon_assoc,
2272 };
2273
2274 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
2275         .get_hcmd_size = iwl4965_get_hcmd_size,
2276         .build_addsta_hcmd = iwl4965_build_addsta_hcmd,
2277         .chain_noise_reset = iwl4965_chain_noise_reset,
2278         .gain_computation = iwl4965_gain_computation,
2279         .rts_tx_cmd_flag = iwl4965_rts_tx_cmd_flag,
2280         .calc_rssi = iwl4965_calc_rssi,
2281 };
2282
2283 static struct iwl_lib_ops iwl4965_lib = {
2284         .set_hw_params = iwl4965_hw_set_hw_params,
2285         .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
2286         .txq_set_sched = iwl4965_txq_set_sched,
2287         .txq_agg_enable = iwl4965_txq_agg_enable,
2288         .txq_agg_disable = iwl4965_txq_agg_disable,
2289         .rx_handler_setup = iwl4965_rx_handler_setup,
2290         .setup_deferred_work = iwl4965_setup_deferred_work,
2291         .cancel_deferred_work = iwl4965_cancel_deferred_work,
2292         .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
2293         .alive_notify = iwl4965_alive_notify,
2294         .init_alive_start = iwl4965_init_alive_start,
2295         .load_ucode = iwl4965_load_bsm,
2296         .apm_ops = {
2297                 .init = iwl4965_apm_init,
2298                 .reset = iwl4965_apm_reset,
2299                 .stop = iwl4965_apm_stop,
2300                 .config = iwl4965_nic_config,
2301                 .set_pwr_src = iwl_set_pwr_src,
2302         },
2303         .eeprom_ops = {
2304                 .regulatory_bands = {
2305                         EEPROM_REGULATORY_BAND_1_CHANNELS,
2306                         EEPROM_REGULATORY_BAND_2_CHANNELS,
2307                         EEPROM_REGULATORY_BAND_3_CHANNELS,
2308                         EEPROM_REGULATORY_BAND_4_CHANNELS,
2309                         EEPROM_REGULATORY_BAND_5_CHANNELS,
2310                         EEPROM_4965_REGULATORY_BAND_24_FAT_CHANNELS,
2311                         EEPROM_4965_REGULATORY_BAND_52_FAT_CHANNELS
2312                 },
2313                 .verify_signature  = iwlcore_eeprom_verify_signature,
2314                 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
2315                 .release_semaphore = iwlcore_eeprom_release_semaphore,
2316                 .calib_version = iwl4965_eeprom_calib_version,
2317                 .query_addr = iwlcore_eeprom_query_addr,
2318         },
2319         .send_tx_power  = iwl4965_send_tx_power,
2320         .update_chain_flags = iwl_update_chain_flags,
2321         .temperature = iwl4965_temperature_calib,
2322 };
2323
2324 static struct iwl_ops iwl4965_ops = {
2325         .lib = &iwl4965_lib,
2326         .hcmd = &iwl4965_hcmd,
2327         .utils = &iwl4965_hcmd_utils,
2328 };
2329
2330 struct iwl_cfg iwl4965_agn_cfg = {
2331         .name = "4965AGN",
2332         .fw_name = IWL4965_MODULE_FIRMWARE,
2333         .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
2334         .eeprom_size = IWL4965_EEPROM_IMG_SIZE,
2335         .eeprom_ver = EEPROM_4965_EEPROM_VERSION,
2336         .eeprom_calib_ver = EEPROM_4965_TX_POWER_VERSION,
2337         .ops = &iwl4965_ops,
2338         .mod_params = &iwl4965_mod_params,
2339 };
2340
2341 /* Module firmware */
2342 MODULE_FIRMWARE(IWL4965_MODULE_FIRMWARE);
2343
2344 module_param_named(antenna, iwl4965_mod_params.antenna, int, 0444);
2345 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
2346 module_param_named(disable, iwl4965_mod_params.disable, int, 0444);
2347 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
2348 module_param_named(swcrypto, iwl4965_mod_params.sw_crypto, int, 0444);
2349 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
2350 module_param_named(debug, iwl4965_mod_params.debug, int, 0444);
2351 MODULE_PARM_DESC(debug, "debug output mask");
2352 module_param_named(
2353         disable_hw_scan, iwl4965_mod_params.disable_hw_scan, int, 0444);
2354 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
2355
2356 module_param_named(queues_num, iwl4965_mod_params.num_of_queues, int, 0444);
2357 MODULE_PARM_DESC(queues_num, "number of hw queues.");
2358 /* QoS */
2359 module_param_named(qos_enable, iwl4965_mod_params.enable_qos, int, 0444);
2360 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
2361 /* 11n */
2362 module_param_named(11n_disable, iwl4965_mod_params.disable_11n, int, 0444);
2363 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
2364 module_param_named(amsdu_size_8K, iwl4965_mod_params.amsdu_size_8K, int, 0444);
2365 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
2366
2367 module_param_named(fw_restart4965, iwl4965_mod_params.restart_fw, int, 0444);
2368 MODULE_PARM_DESC(fw_restart4965, "restart firmware in case of error");