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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/version.h>
  30 #include <linux/init.h>
  31 #include <linux/pci.h>
  32 #include <linux/dma-mapping.h>
  33 #include <linux/delay.h>
  34 #include <linux/skbuff.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/wireless.h>
  37 #include <net/mac80211.h>
  38 #include <linux/etherdevice.h>
  39 #include <asm/unaligned.h>
  40
  41 #include "iwl-eeprom.h"
  42 #include "iwl-dev.h"
  43 #include "iwl-core.h"
  44 #include "iwl-io.h"
  45 #include "iwl-helpers.h"
  46 #include "iwl-calib.h"
  47 #include "iwl-sta.h"
  48
  49 static int iwl4965_send_tx_power(struct iwl_priv *priv);
  50 static int iwl4965_hw_get_temperature(const struct iwl_priv *priv);
  51
  52 /* Change firmware file name, using "-" and incrementing number,
  53  *   *only* when uCode interface or architecture changes so that it
  54  *   is not compatible with earlier drivers.
  55  * This number will also appear in << 8 position of 1st dword of uCode file */
  56 #define IWL4965_UCODE_API "-2"
  57
  58
  59 /* module parameters */
  60 static struct iwl_mod_params iwl4965_mod_params = {
  61         .num_of_queues = IWL49_NUM_QUEUES,
  62         .num_of_ampdu_queues = IWL49_NUM_AMPDU_QUEUES,
  63         .enable_qos = 1,
  64         .amsdu_size_8K = 1,
  65         .restart_fw = 1,
  66         /* the rest are 0 by default */
  67 };
  68
  69 /* check contents of special bootstrap uCode SRAM */
  70 static int iwl4965_verify_bsm(struct iwl_priv *priv)
  71 {
  72         __le32 *image = priv->ucode_boot.v_addr;
  73         u32 len = priv->ucode_boot.len;
  74         u32 reg;
  75         u32 val;
  76
  77         IWL_DEBUG_INFO("Begin verify bsm\n");
  78
  79         /* verify BSM SRAM contents */
  80         val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
  81         for (reg = BSM_SRAM_LOWER_BOUND;
  82              reg < BSM_SRAM_LOWER_BOUND + len;
  83              reg += sizeof(u32), image++) {
  84                 val = iwl_read_prph(priv, reg);
  85                 if (val != le32_to_cpu(*image)) {
  86                         IWL_ERROR("BSM uCode verification failed at "
  87                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
  88                                   BSM_SRAM_LOWER_BOUND,
  89                                   reg - BSM_SRAM_LOWER_BOUND, len,
  90                                   val, le32_to_cpu(*image));
  91                         return -EIO;
  92                 }
  93         }
  94
  95         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
  96
  97         return 0;
  98 }
  99
 100 /**
 101  * iwl4965_load_bsm - Load bootstrap instructions
 102  *
 103  * BSM operation:
 104  *
 105  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
 106  * in special SRAM that does not power down during RFKILL.  When powering back
 107  * up after power-saving sleeps (or during initial uCode load), the BSM loads
 108  * the bootstrap program into the on-board processor, and starts it.
 109  *
 110  * The bootstrap program loads (via DMA) instructions and data for a new
 111  * program from host DRAM locations indicated by the host driver in the
 112  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
 113  * automatically.
 114  *
 115  * When initializing the NIC, the host driver points the BSM to the
 116  * "initialize" uCode image.  This uCode sets up some internal data, then
 117  * notifies host via "initialize alive" that it is complete.
 118  *
 119  * The host then replaces the BSM_DRAM_* pointer values to point to the
 120  * normal runtime uCode instructions and a backup uCode data cache buffer
 121  * (filled initially with starting data values for the on-board processor),
 122  * then triggers the "initialize" uCode to load and launch the runtime uCode,
 123  * which begins normal operation.
 124  *
 125  * When doing a power-save shutdown, runtime uCode saves data SRAM into
 126  * the backup data cache in DRAM before SRAM is powered down.
 127  *
 128  * When powering back up, the BSM loads the bootstrap program.  This reloads
 129  * the runtime uCode instructions and the backup data cache into SRAM,
 130  * and re-launches the runtime uCode from where it left off.
 131  */
 132 static int iwl4965_load_bsm(struct iwl_priv *priv)
 133 {
 134         __le32 *image = priv->ucode_boot.v_addr;
 135         u32 len = priv->ucode_boot.len;
 136         dma_addr_t pinst;
 137         dma_addr_t pdata;
 138         u32 inst_len;
 139         u32 data_len;
 140         int i;
 141         u32 done;
 142         u32 reg_offset;
 143         int ret;
 144
 145         IWL_DEBUG_INFO("Begin load bsm\n");
 146
 147         priv->ucode_type = UCODE_RT;
 148
 149         /* make sure bootstrap program is no larger than BSM's SRAM size */
 150         if (len > IWL_MAX_BSM_SIZE)
 151                 return -EINVAL;
 152
 153         /* Tell bootstrap uCode where to find the "Initialize" uCode
 154          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
 155          * NOTE:  iwl_init_alive_start() will replace these values,
 156          *        after the "initialize" uCode has run, to point to
 157          *        runtime/protocol instructions and backup data cache.
 158          */
 159         pinst = priv->ucode_init.p_addr >> 4;
 160         pdata = priv->ucode_init_data.p_addr >> 4;
 161         inst_len = priv->ucode_init.len;
 162         data_len = priv->ucode_init_data.len;
 163
 164         ret = iwl_grab_nic_access(priv);
 165         if (ret)
 166                 return ret;
 167
 168         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 169         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 170         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
 171         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
 172
 173         /* Fill BSM memory with bootstrap instructions */
 174         for (reg_offset = BSM_SRAM_LOWER_BOUND;
 175              reg_offset < BSM_SRAM_LOWER_BOUND + len;
 176              reg_offset += sizeof(u32), image++)
 177                 _iwl_write_prph(priv, reg_offset, le32_to_cpu(*image));
 178
 179         ret = iwl4965_verify_bsm(priv);
 180         if (ret) {
 181                 iwl_release_nic_access(priv);
 182                 return ret;
 183         }
 184
 185         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
 186         iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
 187         iwl_write_prph(priv, BSM_WR_MEM_DST_REG, RTC_INST_LOWER_BOUND);
 188         iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
 189
 190         /* Load bootstrap code into instruction SRAM now,
 191          *   to prepare to load "initialize" uCode */
 192         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);
 193
 194         /* Wait for load of bootstrap uCode to finish */
 195         for (i = 0; i < 100; i++) {
 196                 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
 197                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
 198                         break;
 199                 udelay(10);
 200         }
 201         if (i < 100)
 202                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
 203         else {
 204                 IWL_ERROR("BSM write did not complete!\n");
 205                 return -EIO;
 206         }
 207
 208         /* Enable future boot loads whenever power management unit triggers it
 209          *   (e.g. when powering back up after power-save shutdown) */
 210         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
 211
 212         iwl_release_nic_access(priv);
 213
 214         return 0;
 215 }
 216
 217 /**
 218  * iwl4965_set_ucode_ptrs - Set uCode address location
 219  *
 220  * Tell initialization uCode where to find runtime uCode.
 221  *
 222  * BSM registers initially contain pointers to initialization uCode.
 223  * We need to replace them to load runtime uCode inst and data,
 224  * and to save runtime data when powering down.
 225  */
 226 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
 227 {
 228         dma_addr_t pinst;
 229         dma_addr_t pdata;
 230         unsigned long flags;
 231         int ret = 0;
 232
 233         /* bits 35:4 for 4965 */
 234         pinst = priv->ucode_code.p_addr >> 4;
 235         pdata = priv->ucode_data_backup.p_addr >> 4;
 236
 237         spin_lock_irqsave(&priv->lock, flags);
 238         ret = iwl_grab_nic_access(priv);
 239         if (ret) {
 240                 spin_unlock_irqrestore(&priv->lock, flags);
 241                 return ret;
 242         }
 243
 244         /* Tell bootstrap uCode where to find image to load */
 245         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 246         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 247         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
 248                                  priv->ucode_data.len);
 249
 250         /* Inst bytecount must be last to set up, bit 31 signals uCode
 251          *   that all new ptr/size info is in place */
 252         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
 253                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
 254         iwl_release_nic_access(priv);
 255
 256         spin_unlock_irqrestore(&priv->lock, flags);
 257
 258         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
 259
 260         return ret;
 261 }
 262
 263 /**
 264  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
 265  *
 266  * Called after REPLY_ALIVE notification received from "initialize" uCode.
 267  *
 268  * The 4965 "initialize" ALIVE reply contains calibration data for:
 269  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
 270  *   (3945 does not contain this data).
 271  *
 272  * Tell "initialize" uCode to go ahead and load the runtime uCode.
 273 */
 274 static void iwl4965_init_alive_start(struct iwl_priv *priv)
 275 {
 276         /* Check alive response for "valid" sign from uCode */
 277         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
 278                 /* We had an error bringing up the hardware, so take it
 279                  * all the way back down so we can try again */
 280                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
 281                 goto restart;
 282         }
 283
 284         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
 285          * This is a paranoid check, because we would not have gotten the
 286          * "initialize" alive if code weren't properly loaded.  */
 287         if (iwl_verify_ucode(priv)) {
 288                 /* Runtime instruction load was bad;
 289                  * take it all the way back down so we can try again */
 290                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
 291                 goto restart;
 292         }
 293
 294         /* Calculate temperature */
 295         priv->temperature = iwl4965_hw_get_temperature(priv);
 296
 297         /* Send pointers to protocol/runtime uCode image ... init code will
 298          * load and launch runtime uCode, which will send us another "Alive"
 299          * notification. */
 300         IWL_DEBUG_INFO("Initialization Alive received.\n");
 301         if (iwl4965_set_ucode_ptrs(priv)) {
 302                 /* Runtime instruction load won't happen;
 303                  * take it all the way back down so we can try again */
 304                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
 305                 goto restart;
 306         }
 307         return;
 308
 309 restart:
 310         queue_work(priv->workqueue, &priv->restart);
 311 }
 312
 313 static int is_fat_channel(__le32 rxon_flags)
 314 {
 315         return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
 316                 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
 317 }
 318
 319 /*
 320  * EEPROM handlers
 321  */
 322
 323 static int iwl4965_eeprom_check_version(struct iwl_priv *priv)
 324 {
 325         u16 eeprom_ver;
 326         u16 calib_ver;
 327
 328         eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
 329
 330         calib_ver = iwl_eeprom_query16(priv, EEPROM_4965_CALIB_VERSION_OFFSET);
 331
 332         if (eeprom_ver < EEPROM_4965_EEPROM_VERSION ||
 333             calib_ver < EEPROM_4965_TX_POWER_VERSION)
 334                 goto err;
 335
 336         return 0;
 337 err:
 338         IWL_ERROR("Unsuported EEPROM VER=0x%x < 0x%x CALIB=0x%x < 0x%x\n",
 339                   eeprom_ver, EEPROM_4965_EEPROM_VERSION,
 340                   calib_ver, EEPROM_4965_TX_POWER_VERSION);
 341         return -EINVAL;
 342
 343 }
 344 int iwl4965_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 345 {
 346         int ret;
 347         unsigned long flags;
 348
 349         spin_lock_irqsave(&priv->lock, flags);
 350         ret = iwl_grab_nic_access(priv);
 351         if (ret) {
 352                 spin_unlock_irqrestore(&priv->lock, flags);
 353                 return ret;
 354         }
 355
 356         if (src == IWL_PWR_SRC_VAUX) {
 357                 u32 val;
 358                 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
 359                                             &val);
 360
 361                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) {
 362                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 363                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 364                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 365                 }
 366         } else {
 367                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 368                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 369                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 370         }
 371
 372         iwl_release_nic_access(priv);
 373         spin_unlock_irqrestore(&priv->lock, flags);
 374
 375         return ret;
 376 }
 377
 378 /*
 379  * Activate/Deactivat Tx DMA/FIFO channels according tx fifos mask
 380  * must be called under priv->lock and mac access
 381  */
 382 static void iwl4965_txq_set_sched(struct iwl_priv *priv, u32 mask)
 383 {
 384         iwl_write_prph(priv, IWL49_SCD_TXFACT, mask);
 385 }
 386
 387 static int iwl4965_apm_init(struct iwl_priv *priv)
 388 {
 389         int ret = 0;
 390
 391         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 392                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 393
 394         /* disable L0s without affecting L1 :don't wait for ICH L0s bug W/A) */
 395         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 396                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
 397
 398         /* set "initialization complete" bit to move adapter
 399          * D0U* --> D0A* state */
 400         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 401
 402         /* wait for clock stabilization */
 403         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
 404                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 405                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 406         if (ret < 0) {
 407                 IWL_DEBUG_INFO("Failed to init the card\n");
 408                 goto out;
 409         }
 410
 411         ret = iwl_grab_nic_access(priv);
 412         if (ret)
 413                 goto out;
 414
 415         /* enable DMA */
 416         iwl_write_prph(priv, APMG_CLK_CTRL_REG, APMG_CLK_VAL_DMA_CLK_RQT |
 417                                                 APMG_CLK_VAL_BSM_CLK_RQT);
 418
 419         udelay(20);
 420
 421         /* disable L1-Active */
 422         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 423                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 424
 425         iwl_release_nic_access(priv);
 426 out:
 427         return ret;
 428 }
 429
 430
 431 static void iwl4965_nic_config(struct iwl_priv *priv)
 432 {
 433         unsigned long flags;
 434         u32 val;
 435         u16 radio_cfg;
 436         u8 val_link;
 437
 438         spin_lock_irqsave(&priv->lock, flags);
 439
 440         if ((priv->rev_id & 0x80) == 0x80 && (priv->rev_id & 0x7f) < 8) {
 441                 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 442                 /* Enable No Snoop field */
 443                 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
 444                                        val & ~(1 << 11));
 445         }
 446
 447         pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
 448
 449         /* L1 is enabled by BIOS */
 450         if ((val_link & PCI_LINK_VAL_L1_EN) == PCI_LINK_VAL_L1_EN)
 451                 /* diable L0S disabled L1A enabled */
 452                 iwl_set_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 453         else
 454                 /* L0S enabled L1A disabled */
 455                 iwl_clear_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 456
 457         radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
 458
 459         /* write radio config values to register */
 460         if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) == EEPROM_4965_RF_CFG_TYPE_MAX)
 461                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 462                             EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
 463                             EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
 464                             EEPROM_RF_CFG_DASH_MSK(radio_cfg));
 465
 466         /* set CSR_HW_CONFIG_REG for uCode use */
 467         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 468                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 469                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
 470
 471         priv->calib_info = (struct iwl_eeprom_calib_info *)
 472                 iwl_eeprom_query_addr(priv, EEPROM_4965_CALIB_TXPOWER_OFFSET);
 473
 474         spin_unlock_irqrestore(&priv->lock, flags);
 475 }
 476
 477 static int iwl4965_apm_stop_master(struct iwl_priv *priv)
 478 {
 479         int ret = 0;
 480         unsigned long flags;
 481
 482         spin_lock_irqsave(&priv->lock, flags);
 483
 484         /* set stop master bit */
 485         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 486
 487         ret = iwl_poll_bit(priv, CSR_RESET,
 488                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
 489                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 490         if (ret < 0)
 491                 goto out;
 492
 493 out:
 494         spin_unlock_irqrestore(&priv->lock, flags);
 495         IWL_DEBUG_INFO("stop master\n");
 496
 497         return ret;
 498 }
 499
 500 static void iwl4965_apm_stop(struct iwl_priv *priv)
 501 {
 502         unsigned long flags;
 503
 504         iwl4965_apm_stop_master(priv);
 505
 506         spin_lock_irqsave(&priv->lock, flags);
 507
 508         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 509
 510         udelay(10);
 511
 512         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 513         spin_unlock_irqrestore(&priv->lock, flags);
 514 }
 515
 516 static int iwl4965_apm_reset(struct iwl_priv *priv)
 517 {
 518         int ret = 0;
 519         unsigned long flags;
 520
 521         iwl4965_apm_stop_master(priv);
 522
 523         spin_lock_irqsave(&priv->lock, flags);
 524
 525         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 526
 527         udelay(10);
 528
 529         /* FIXME: put here L1A -L0S w/a */
 530
 531         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 532
 533         ret = iwl_poll_bit(priv, CSR_RESET,
 534                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 535                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
 536
 537         if (ret)
 538                 goto out;
 539
 540         udelay(10);
 541
 542         ret = iwl_grab_nic_access(priv);
 543         if (ret)
 544                 goto out;
 545         /* Enable DMA and BSM Clock */
 546         iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT |
 547                                               APMG_CLK_VAL_BSM_CLK_RQT);
 548
 549         udelay(10);
 550
 551         /* disable L1A */
 552         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 553                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 554
 555         iwl_release_nic_access(priv);
 556
 557         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 558         wake_up_interruptible(&priv->wait_command_queue);
 559
 560 out:
 561         spin_unlock_irqrestore(&priv->lock, flags);
 562
 563         return ret;
 564 }
 565
 566 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
 567  * Called after every association, but this runs only once!
 568  *  ... once chain noise is calibrated the first time, it's good forever.  */
 569 static void iwl4965_chain_noise_reset(struct iwl_priv *priv)
 570 {
 571         struct iwl_chain_noise_data *data = &(priv->chain_noise_data);
 572
 573         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
 574                 struct iwl4965_calibration_cmd cmd;
 575
 576                 memset(&cmd, 0, sizeof(cmd));
 577                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
 578                 cmd.diff_gain_a = 0;
 579                 cmd.diff_gain_b = 0;
 580                 cmd.diff_gain_c = 0;
 581                 if (iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 582                                  sizeof(cmd), &cmd))
 583                         IWL_ERROR("Could not send REPLY_PHY_CALIBRATION_CMD\n");
 584                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
 585                 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
 586         }
 587 }
 588
 589 static void iwl4965_gain_computation(struct iwl_priv *priv,
 590                 u32 *average_noise,
 591                 u16 min_average_noise_antenna_i,
 592                 u32 min_average_noise)
 593 {
 594         int i, ret;
 595         struct iwl_chain_noise_data *data = &priv->chain_noise_data;
 596
 597         data->delta_gain_code[min_average_noise_antenna_i] = 0;
 598
 599         for (i = 0; i < NUM_RX_CHAINS; i++) {
 600                 s32 delta_g = 0;
 601
 602                 if (!(data->disconn_array[i]) &&
 603                     (data->delta_gain_code[i] ==
 604                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
 605                         delta_g = average_noise[i] - min_average_noise;
 606                         data->delta_gain_code[i] = (u8)((delta_g * 10) / 15);
 607                         data->delta_gain_code[i] =
 608                                 min(data->delta_gain_code[i],
 609                                 (u8) CHAIN_NOISE_MAX_DELTA_GAIN_CODE);
 610
 611                         data->delta_gain_code[i] =
 612                                 (data->delta_gain_code[i] | (1 << 2));
 613                 } else {
 614                         data->delta_gain_code[i] = 0;
 615                 }
 616         }
 617         IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
 618                      data->delta_gain_code[0],
 619                      data->delta_gain_code[1],
 620                      data->delta_gain_code[2]);
 621
 622         /* Differential gain gets sent to uCode only once */
 623         if (!data->radio_write) {
 624                 struct iwl4965_calibration_cmd cmd;
 625                 data->radio_write = 1;
 626
 627                 memset(&cmd, 0, sizeof(cmd));
 628                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
 629                 cmd.diff_gain_a = data->delta_gain_code[0];
 630                 cmd.diff_gain_b = data->delta_gain_code[1];
 631                 cmd.diff_gain_c = data->delta_gain_code[2];
 632                 ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 633                                       sizeof(cmd), &cmd);
 634                 if (ret)
 635                         IWL_DEBUG_CALIB("fail sending cmd "
 636                                      "REPLY_PHY_CALIBRATION_CMD \n");
 637
 638                 /* TODO we might want recalculate
 639                  * rx_chain in rxon cmd */
 640
 641                 /* Mark so we run this algo only once! */
 642                 data->state = IWL_CHAIN_NOISE_CALIBRATED;
 643         }
 644         data->chain_noise_a = 0;
 645         data->chain_noise_b = 0;
 646         data->chain_noise_c = 0;
 647         data->chain_signal_a = 0;
 648         data->chain_signal_b = 0;
 649         data->chain_signal_c = 0;
 650         data->beacon_count = 0;
 651 }
 652
 653 static void iwl4965_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 654                         __le32 *tx_flags)
 655 {
 656         if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) {
 657                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 658                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 659         } else if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
 660                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 661                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 662         }
 663 }
 664
 665 static void iwl4965_bg_txpower_work(struct work_struct *work)
 666 {
 667         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 668                         txpower_work);
 669
 670         /* If a scan happened to start before we got here
 671          * then just return; the statistics notification will
 672          * kick off another scheduled work to compensate for
 673          * any temperature delta we missed here. */
 674         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 675             test_bit(STATUS_SCANNING, &priv->status))
 676                 return;
 677
 678         mutex_lock(&priv->mutex);
 679
 680         /* Regardless of if we are assocaited, we must reconfigure the
 681          * TX power since frames can be sent on non-radar channels while
 682          * not associated */
 683         iwl4965_send_tx_power(priv);
 684
 685         /* Update last_temperature to keep is_calib_needed from running
 686          * when it isn't needed... */
 687         priv->last_temperature = priv->temperature;
 688
 689         mutex_unlock(&priv->mutex);
 690 }
 691
 692 /*
 693  * Acquire priv->lock before calling this function !
 694  */
 695 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
 696 {
 697         iwl_write_direct32(priv, HBUS_TARG_WRPTR,
 698                              (index & 0xff) | (txq_id << 8));
 699         iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(txq_id), index);
 700 }
 701
 702 /**
 703  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
 704  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
 705  * @scd_retry: (1) Indicates queue will be used in aggregation mode
 706  *
 707  * NOTE:  Acquire priv->lock before calling this function !
 708  */
 709 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
 710                                         struct iwl_tx_queue *txq,
 711                                         int tx_fifo_id, int scd_retry)
 712 {
 713         int txq_id = txq->q.id;
 714
 715         /* Find out whether to activate Tx queue */
 716         int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
 717
 718         /* Set up and activate */
 719         iwl_write_prph(priv, IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
 720                          (active << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
 721                          (tx_fifo_id << IWL49_SCD_QUEUE_STTS_REG_POS_TXF) |
 722                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_WSL) |
 723                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
 724                          IWL49_SCD_QUEUE_STTS_REG_MSK);
 725
 726         txq->sched_retry = scd_retry;
 727
 728         IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
 729                        active ? "Activate" : "Deactivate",
 730                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
 731 }
 732
 733 static const u16 default_queue_to_tx_fifo[] = {
 734         IWL_TX_FIFO_AC3,
 735         IWL_TX_FIFO_AC2,
 736         IWL_TX_FIFO_AC1,
 737         IWL_TX_FIFO_AC0,
 738         IWL49_CMD_FIFO_NUM,
 739         IWL_TX_FIFO_HCCA_1,
 740         IWL_TX_FIFO_HCCA_2
 741 };
 742
 743 static int iwl4965_alive_notify(struct iwl_priv *priv)
 744 {
 745         u32 a;
 746         int i = 0;
 747         unsigned long flags;
 748         int ret;
 749
 750         spin_lock_irqsave(&priv->lock, flags);
 751
 752         ret = iwl_grab_nic_access(priv);
 753         if (ret) {
 754                 spin_unlock_irqrestore(&priv->lock, flags);
 755                 return ret;
 756         }
 757
 758         /* Clear 4965's internal Tx Scheduler data base */
 759         priv->scd_base_addr = iwl_read_prph(priv, IWL49_SCD_SRAM_BASE_ADDR);
 760         a = priv->scd_base_addr + IWL49_SCD_CONTEXT_DATA_OFFSET;
 761         for (; a < priv->scd_base_addr + IWL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
 762                 iwl_write_targ_mem(priv, a, 0);
 763         for (; a < priv->scd_base_addr + IWL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
 764                 iwl_write_targ_mem(priv, a, 0);
 765         for (; a < sizeof(u16) * priv->hw_params.max_txq_num; a += 4)
 766                 iwl_write_targ_mem(priv, a, 0);
 767
 768         /* Tel 4965 where to find Tx byte count tables */
 769         iwl_write_prph(priv, IWL49_SCD_DRAM_BASE_ADDR,
 770                 (priv->shared_phys +
 771                  offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
 772
 773         /* Disable chain mode for all queues */
 774         iwl_write_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, 0);
 775
 776         /* Initialize each Tx queue (including the command queue) */
 777         for (i = 0; i < priv->hw_params.max_txq_num; i++) {
 778
 779                 /* TFD circular buffer read/write indexes */
 780                 iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(i), 0);
 781                 iwl_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
 782
 783                 /* Max Tx Window size for Scheduler-ACK mode */
 784                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 785                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i),
 786                                 (SCD_WIN_SIZE <<
 787                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
 788                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
 789
 790                 /* Frame limit */
 791                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 792                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
 793                                 sizeof(u32),
 794                                 (SCD_FRAME_LIMIT <<
 795                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
 796                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
 797
 798         }
 799         iwl_write_prph(priv, IWL49_SCD_INTERRUPT_MASK,
 800                                  (1 << priv->hw_params.max_txq_num) - 1);
 801
 802         /* Activate all Tx DMA/FIFO channels */
 803         priv->cfg->ops->lib->txq_set_sched(priv, IWL_MASK(0, 7));
 804
 805         iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
 806
 807         /* Map each Tx/cmd queue to its corresponding fifo */
 808         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
 809                 int ac = default_queue_to_tx_fifo[i];
 810                 iwl_txq_ctx_activate(priv, i);
 811                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
 812         }
 813
 814         iwl_release_nic_access(priv);
 815         spin_unlock_irqrestore(&priv->lock, flags);
 816
 817         return ret;
 818 }
 819
 820 static struct iwl_sensitivity_ranges iwl4965_sensitivity = {
 821         .min_nrg_cck = 97,
 822         .max_nrg_cck = 0,
 823
 824         .auto_corr_min_ofdm = 85,
 825         .auto_corr_min_ofdm_mrc = 170,
 826         .auto_corr_min_ofdm_x1 = 105,
 827         .auto_corr_min_ofdm_mrc_x1 = 220,
 828
 829         .auto_corr_max_ofdm = 120,
 830         .auto_corr_max_ofdm_mrc = 210,
 831         .auto_corr_max_ofdm_x1 = 140,
 832         .auto_corr_max_ofdm_mrc_x1 = 270,
 833
 834         .auto_corr_min_cck = 125,
 835         .auto_corr_max_cck = 200,
 836         .auto_corr_min_cck_mrc = 200,
 837         .auto_corr_max_cck_mrc = 400,
 838
 839         .nrg_th_cck = 100,
 840         .nrg_th_ofdm = 100,
 841 };
 842
 843 /**
 844  * iwl4965_hw_set_hw_params
 845  *
 846  * Called when initializing driver
 847  */
 848 static int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
 849 {
 850
 851         if ((priv->cfg->mod_params->num_of_queues > IWL49_NUM_QUEUES) ||
 852             (priv->cfg->mod_params->num_of_queues < IWL_MIN_NUM_QUEUES)) {
 853                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
 854                           IWL_MIN_NUM_QUEUES, IWL49_NUM_QUEUES);
 855                 return -EINVAL;
 856         }
 857
 858         priv->hw_params.max_txq_num = priv->cfg->mod_params->num_of_queues;
 859         priv->hw_params.first_ampdu_q = IWL49_FIRST_AMPDU_QUEUE;
 860         priv->hw_params.max_stations = IWL4965_STATION_COUNT;
 861         priv->hw_params.bcast_sta_id = IWL4965_BROADCAST_ID;
 862         priv->hw_params.max_data_size = IWL49_RTC_DATA_SIZE;
 863         priv->hw_params.max_inst_size = IWL49_RTC_INST_SIZE;
 864         priv->hw_params.max_bsm_size = BSM_SRAM_SIZE;
 865         priv->hw_params.fat_channel = BIT(IEEE80211_BAND_5GHZ);
 866
 867         priv->hw_params.tx_chains_num = 2;
 868         priv->hw_params.rx_chains_num = 2;
 869         priv->hw_params.valid_tx_ant = ANT_A | ANT_B;
 870         priv->hw_params.valid_rx_ant = ANT_A | ANT_B;
 871         priv->hw_params.ct_kill_threshold = CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD);
 872
 873         priv->hw_params.sens = &iwl4965_sensitivity;
 874
 875         return 0;
 876 }
 877
 878 /* set card power command */
 879 static int iwl4965_set_power(struct iwl_priv *priv,
 880                       void *cmd)
 881 {
 882         int ret = 0;
 883
 884         ret = iwl_send_cmd_pdu_async(priv, POWER_TABLE_CMD,
 885                                     sizeof(struct iwl4965_powertable_cmd),
 886                                     cmd, NULL);
 887         return ret;
 888 }
 889
 890 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
 891 {
 892         s32 sign = 1;
 893
 894         if (num < 0) {
 895                 sign = -sign;
 896                 num = -num;
 897         }
 898         if (denom < 0) {
 899                 sign = -sign;
 900                 denom = -denom;
 901         }
 902         *res = 1;
 903         *res = ((num * 2 + denom) / (denom * 2)) * sign;
 904
 905         return 1;
 906 }
 907
 908 /**
 909  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
 910  *
 911  * Determines power supply voltage compensation for txpower calculations.
 912  * Returns number of 1/2-dB steps to subtract from gain table index,
 913  * to compensate for difference between power supply voltage during
 914  * factory measurements, vs. current power supply voltage.
 915  *
 916  * Voltage indication is higher for lower voltage.
 917  * Lower voltage requires more gain (lower gain table index).
 918  */
 919 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
 920                                             s32 current_voltage)
 921 {
 922         s32 comp = 0;
 923
 924         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
 925             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
 926                 return 0;
 927
 928         iwl4965_math_div_round(current_voltage - eeprom_voltage,
 929                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
 930
 931         if (current_voltage > eeprom_voltage)
 932                 comp *= 2;
 933         if ((comp < -2) || (comp > 2))
 934                 comp = 0;
 935
 936         return comp;
 937 }
 938
 939 static s32 iwl4965_get_tx_atten_grp(u16 channel)
 940 {
 941         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
 942             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
 943                 return CALIB_CH_GROUP_5;
 944
 945         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
 946             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
 947                 return CALIB_CH_GROUP_1;
 948
 949         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
 950             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
 951                 return CALIB_CH_GROUP_2;
 952
 953         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
 954             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
 955                 return CALIB_CH_GROUP_3;
 956
 957         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
 958             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
 959                 return CALIB_CH_GROUP_4;
 960
 961         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
 962         return -1;
 963 }
 964
 965 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
 966 {
 967         s32 b = -1;
 968
 969         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
 970                 if (priv->calib_info->band_info[b].ch_from == 0)
 971                         continue;
 972
 973                 if ((channel >= priv->calib_info->band_info[b].ch_from)
 974                     && (channel <= priv->calib_info->band_info[b].ch_to))
 975                         break;
 976         }
 977
 978         return b;
 979 }
 980
 981 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
 982 {
 983         s32 val;
 984
 985         if (x2 == x1)
 986                 return y1;
 987         else {
 988                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
 989                 return val + y2;
 990         }
 991 }
 992
 993 /**
 994  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
 995  *
 996  * Interpolates factory measurements from the two sample channels within a
 997  * sub-band, to apply to channel of interest.  Interpolation is proportional to
 998  * differences in channel frequencies, which is proportional to differences
 999  * in channel number.
1000  */
1001 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
1002                                     struct iwl_eeprom_calib_ch_info *chan_info)
1003 {
1004         s32 s = -1;
1005         u32 c;
1006         u32 m;
1007         const struct iwl_eeprom_calib_measure *m1;
1008         const struct iwl_eeprom_calib_measure *m2;
1009         struct iwl_eeprom_calib_measure *omeas;
1010         u32 ch_i1;
1011         u32 ch_i2;
1012
1013         s = iwl4965_get_sub_band(priv, channel);
1014         if (s >= EEPROM_TX_POWER_BANDS) {
1015                 IWL_ERROR("Tx Power can not find channel %d ", channel);
1016                 return -1;
1017         }
1018
1019         ch_i1 = priv->calib_info->band_info[s].ch1.ch_num;
1020         ch_i2 = priv->calib_info->band_info[s].ch2.ch_num;
1021         chan_info->ch_num = (u8) channel;
1022
1023         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
1024                           channel, s, ch_i1, ch_i2);
1025
1026         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
1027                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
1028                         m1 = &(priv->calib_info->band_info[s].ch1.
1029                                measurements[c][m]);
1030                         m2 = &(priv->calib_info->band_info[s].ch2.
1031                                measurements[c][m]);
1032                         omeas = &(chan_info->measurements[c][m]);
1033
1034                         omeas->actual_pow =
1035                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1036                                                            m1->actual_pow,
1037                                                            ch_i2,
1038                                                            m2->actual_pow);
1039                         omeas->gain_idx =
1040                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1041                                                            m1->gain_idx, ch_i2,
1042                                                            m2->gain_idx);
1043                         omeas->temperature =
1044                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1045                                                            m1->temperature,
1046                                                            ch_i2,
1047                                                            m2->temperature);
1048                         omeas->pa_det =
1049                             (s8) iwl4965_interpolate_value(channel, ch_i1,
1050                                                            m1->pa_det, ch_i2,
1051                                                            m2->pa_det);
1052
1053                         IWL_DEBUG_TXPOWER
1054                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
1055                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
1056                         IWL_DEBUG_TXPOWER
1057                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
1058                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
1059                         IWL_DEBUG_TXPOWER
1060                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
1061                              m1->pa_det, m2->pa_det, omeas->pa_det);
1062                         IWL_DEBUG_TXPOWER
1063                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
1064                              m1->temperature, m2->temperature,
1065                              omeas->temperature);
1066                 }
1067         }
1068
1069         return 0;
1070 }
1071
1072 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
1073  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
1074 static s32 back_off_table[] = {
1075         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
1076         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
1077         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
1078         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
1079         10                      /* CCK */
1080 };
1081
1082 /* Thermal compensation values for txpower for various frequency ranges ...
1083  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
1084 static struct iwl4965_txpower_comp_entry {
1085         s32 degrees_per_05db_a;
1086         s32 degrees_per_05db_a_denom;
1087 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
1088         {9, 2},                 /* group 0 5.2, ch  34-43 */
1089         {4, 1},                 /* group 1 5.2, ch  44-70 */
1090         {4, 1},                 /* group 2 5.2, ch  71-124 */
1091         {4, 1},                 /* group 3 5.2, ch 125-200 */
1092         {3, 1}                  /* group 4 2.4, ch   all */
1093 };
1094
1095 static s32 get_min_power_index(s32 rate_power_index, u32 band)
1096 {
1097         if (!band) {
1098                 if ((rate_power_index & 7) <= 4)
1099                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
1100         }
1101         return MIN_TX_GAIN_INDEX;
1102 }
1103
1104 struct gain_entry {
1105         u8 dsp;
1106         u8 radio;
1107 };
1108
1109 static const struct gain_entry gain_table[2][108] = {
1110         /* 5.2GHz power gain index table */
1111         {
1112          {123, 0x3F},           /* highest txpower */
1113          {117, 0x3F},
1114          {110, 0x3F},
1115          {104, 0x3F},
1116          {98, 0x3F},
1117          {110, 0x3E},
1118          {104, 0x3E},
1119          {98, 0x3E},
1120          {110, 0x3D},
1121          {104, 0x3D},
1122          {98, 0x3D},
1123          {110, 0x3C},
1124          {104, 0x3C},
1125          {98, 0x3C},
1126          {110, 0x3B},
1127          {104, 0x3B},
1128          {98, 0x3B},
1129          {110, 0x3A},
1130          {104, 0x3A},
1131          {98, 0x3A},
1132          {110, 0x39},
1133          {104, 0x39},
1134          {98, 0x39},
1135          {110, 0x38},
1136          {104, 0x38},
1137          {98, 0x38},
1138          {110, 0x37},
1139          {104, 0x37},
1140          {98, 0x37},
1141          {110, 0x36},
1142          {104, 0x36},
1143          {98, 0x36},
1144          {110, 0x35},
1145          {104, 0x35},
1146          {98, 0x35},
1147          {110, 0x34},
1148          {104, 0x34},
1149          {98, 0x34},
1150          {110, 0x33},
1151          {104, 0x33},
1152          {98, 0x33},
1153          {110, 0x32},
1154          {104, 0x32},
1155          {98, 0x32},
1156          {110, 0x31},
1157          {104, 0x31},
1158          {98, 0x31},
1159          {110, 0x30},
1160          {104, 0x30},
1161          {98, 0x30},
1162          {110, 0x25},
1163          {104, 0x25},
1164          {98, 0x25},
1165          {110, 0x24},
1166          {104, 0x24},
1167          {98, 0x24},
1168          {110, 0x23},
1169          {104, 0x23},
1170          {98, 0x23},
1171          {110, 0x22},
1172          {104, 0x18},
1173          {98, 0x18},
1174          {110, 0x17},
1175          {104, 0x17},
1176          {98, 0x17},
1177          {110, 0x16},
1178          {104, 0x16},
1179          {98, 0x16},
1180          {110, 0x15},
1181          {104, 0x15},
1182          {98, 0x15},
1183          {110, 0x14},
1184          {104, 0x14},
1185          {98, 0x14},
1186          {110, 0x13},
1187          {104, 0x13},
1188          {98, 0x13},
1189          {110, 0x12},
1190          {104, 0x08},
1191          {98, 0x08},
1192          {110, 0x07},
1193          {104, 0x07},
1194          {98, 0x07},
1195          {110, 0x06},
1196          {104, 0x06},
1197          {98, 0x06},
1198          {110, 0x05},
1199          {104, 0x05},
1200          {98, 0x05},
1201          {110, 0x04},
1202          {104, 0x04},
1203          {98, 0x04},
1204          {110, 0x03},
1205          {104, 0x03},
1206          {98, 0x03},
1207          {110, 0x02},
1208          {104, 0x02},
1209          {98, 0x02},
1210          {110, 0x01},
1211          {104, 0x01},
1212          {98, 0x01},
1213          {110, 0x00},
1214          {104, 0x00},
1215          {98, 0x00},
1216          {93, 0x00},
1217          {88, 0x00},
1218          {83, 0x00},
1219          {78, 0x00},
1220          },
1221         /* 2.4GHz power gain index table */
1222         {
1223          {110, 0x3f},           /* highest txpower */
1224          {104, 0x3f},
1225          {98, 0x3f},
1226          {110, 0x3e},
1227          {104, 0x3e},
1228          {98, 0x3e},
1229          {110, 0x3d},
1230          {104, 0x3d},
1231          {98, 0x3d},
1232          {110, 0x3c},
1233          {104, 0x3c},
1234          {98, 0x3c},
1235          {110, 0x3b},
1236          {104, 0x3b},
1237          {98, 0x3b},
1238          {110, 0x3a},
1239          {104, 0x3a},
1240          {98, 0x3a},
1241          {110, 0x39},
1242          {104, 0x39},
1243          {98, 0x39},
1244          {110, 0x38},
1245          {104, 0x38},
1246          {98, 0x38},
1247          {110, 0x37},
1248          {104, 0x37},
1249          {98, 0x37},
1250          {110, 0x36},
1251          {104, 0x36},
1252          {98, 0x36},
1253          {110, 0x35},
1254          {104, 0x35},
1255          {98, 0x35},
1256          {110, 0x34},
1257          {104, 0x34},
1258          {98, 0x34},
1259          {110, 0x33},
1260          {104, 0x33},
1261          {98, 0x33},
1262          {110, 0x32},
1263          {104, 0x32},
1264          {98, 0x32},
1265          {110, 0x31},
1266          {104, 0x31},
1267          {98, 0x31},
1268          {110, 0x30},
1269          {104, 0x30},
1270          {98, 0x30},
1271          {110, 0x6},
1272          {104, 0x6},
1273          {98, 0x6},
1274          {110, 0x5},
1275          {104, 0x5},
1276          {98, 0x5},
1277          {110, 0x4},
1278          {104, 0x4},
1279          {98, 0x4},
1280          {110, 0x3},
1281          {104, 0x3},
1282          {98, 0x3},
1283          {110, 0x2},
1284          {104, 0x2},
1285          {98, 0x2},
1286          {110, 0x1},
1287          {104, 0x1},
1288          {98, 0x1},
1289          {110, 0x0},
1290          {104, 0x0},
1291          {98, 0x0},
1292          {97, 0},
1293          {96, 0},
1294          {95, 0},
1295          {94, 0},
1296          {93, 0},
1297          {92, 0},
1298          {91, 0},
1299          {90, 0},
1300          {89, 0},
1301          {88, 0},
1302          {87, 0},
1303          {86, 0},
1304          {85, 0},
1305          {84, 0},
1306          {83, 0},
1307          {82, 0},
1308          {81, 0},
1309          {80, 0},
1310          {79, 0},
1311          {78, 0},
1312          {77, 0},
1313          {76, 0},
1314          {75, 0},
1315          {74, 0},
1316          {73, 0},
1317          {72, 0},
1318          {71, 0},
1319          {70, 0},
1320          {69, 0},
1321          {68, 0},
1322          {67, 0},
1323          {66, 0},
1324          {65, 0},
1325          {64, 0},
1326          {63, 0},
1327          {62, 0},
1328          {61, 0},
1329          {60, 0},
1330          {59, 0},
1331          }
1332 };
1333
1334 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
1335                                     u8 is_fat, u8 ctrl_chan_high,
1336                                     struct iwl4965_tx_power_db *tx_power_tbl)
1337 {
1338         u8 saturation_power;
1339         s32 target_power;
1340         s32 user_target_power;
1341         s32 power_limit;
1342         s32 current_temp;
1343         s32 reg_limit;
1344         s32 current_regulatory;
1345         s32 txatten_grp = CALIB_CH_GROUP_MAX;
1346         int i;
1347         int c;
1348         const struct iwl_channel_info *ch_info = NULL;
1349         struct iwl_eeprom_calib_ch_info ch_eeprom_info;
1350         const struct iwl_eeprom_calib_measure *measurement;
1351         s16 voltage;
1352         s32 init_voltage;
1353         s32 voltage_compensation;
1354         s32 degrees_per_05db_num;
1355         s32 degrees_per_05db_denom;
1356         s32 factory_temp;
1357         s32 temperature_comp[2];
1358         s32 factory_gain_index[2];
1359         s32 factory_actual_pwr[2];
1360         s32 power_index;
1361
1362         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
1363          *   are used for indexing into txpower table) */
1364         user_target_power = 2 * priv->tx_power_user_lmt;
1365
1366         /* Get current (RXON) channel, band, width */
1367         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
1368                           is_fat);
1369
1370         ch_info = iwl_get_channel_info(priv, priv->band, channel);
1371
1372         if (!is_channel_valid(ch_info))
1373                 return -EINVAL;
1374
1375         /* get txatten group, used to select 1) thermal txpower adjustment
1376          *   and 2) mimo txpower balance between Tx chains. */
1377         txatten_grp = iwl4965_get_tx_atten_grp(channel);
1378         if (txatten_grp < 0)
1379                 return -EINVAL;
1380
1381         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
1382                           channel, txatten_grp);
1383
1384         if (is_fat) {
1385                 if (ctrl_chan_high)
1386                         channel -= 2;
1387                 else
1388                         channel += 2;
1389         }
1390
1391         /* hardware txpower limits ...
1392          * saturation (clipping distortion) txpowers are in half-dBm */
1393         if (band)
1394                 saturation_power = priv->calib_info->saturation_power24;
1395         else
1396                 saturation_power = priv->calib_info->saturation_power52;
1397
1398         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
1399             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
1400                 if (band)
1401                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
1402                 else
1403                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
1404         }
1405
1406         /* regulatory txpower limits ... reg_limit values are in half-dBm,
1407          *   max_power_avg values are in dBm, convert * 2 */
1408         if (is_fat)
1409                 reg_limit = ch_info->fat_max_power_avg * 2;
1410         else
1411                 reg_limit = ch_info->max_power_avg * 2;
1412
1413         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
1414             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
1415                 if (band)
1416                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
1417                 else
1418                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
1419         }
1420
1421         /* Interpolate txpower calibration values for this channel,
1422          *   based on factory calibration tests on spaced channels. */
1423         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
1424
1425         /* calculate tx gain adjustment based on power supply voltage */
1426         voltage = priv->calib_info->voltage;
1427         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
1428         voltage_compensation =
1429             iwl4965_get_voltage_compensation(voltage, init_voltage);
1430
1431         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
1432                           init_voltage,
1433                           voltage, voltage_compensation);
1434
1435         /* get current temperature (Celsius) */
1436         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
1437         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
1438         current_temp = KELVIN_TO_CELSIUS(current_temp);
1439
1440         /* select thermal txpower adjustment params, based on channel group
1441          *   (same frequency group used for mimo txatten adjustment) */
1442         degrees_per_05db_num =
1443             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
1444         degrees_per_05db_denom =
1445             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
1446
1447         /* get per-chain txpower values from factory measurements */
1448         for (c = 0; c < 2; c++) {
1449                 measurement = &ch_eeprom_info.measurements[c][1];
1450
1451                 /* txgain adjustment (in half-dB steps) based on difference
1452                  *   between factory and current temperature */
1453                 factory_temp = measurement->temperature;
1454                 iwl4965_math_div_round((current_temp - factory_temp) *
1455                                        degrees_per_05db_denom,
1456                                        degrees_per_05db_num,
1457                                        &temperature_comp[c]);
1458
1459                 factory_gain_index[c] = measurement->gain_idx;
1460                 factory_actual_pwr[c] = measurement->actual_pow;
1461
1462                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
1463                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
1464                                   "curr tmp %d, comp %d steps\n",
1465                                   factory_temp, current_temp,
1466                                   temperature_comp[c]);
1467
1468                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
1469                                   factory_gain_index[c],
1470                                   factory_actual_pwr[c]);
1471         }
1472
1473         /* for each of 33 bit-rates (including 1 for CCK) */
1474         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
1475                 u8 is_mimo_rate;
1476                 union iwl4965_tx_power_dual_stream tx_power;
1477
1478                 /* for mimo, reduce each chain's txpower by half
1479                  * (3dB, 6 steps), so total output power is regulatory
1480                  * compliant. */
1481                 if (i & 0x8) {
1482                         current_regulatory = reg_limit -
1483                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
1484                         is_mimo_rate = 1;
1485                 } else {
1486                         current_regulatory = reg_limit;
1487                         is_mimo_rate = 0;
1488                 }
1489
1490                 /* find txpower limit, either hardware or regulatory */
1491                 power_limit = saturation_power - back_off_table[i];
1492                 if (power_limit > current_regulatory)
1493                         power_limit = current_regulatory;
1494
1495                 /* reduce user's txpower request if necessary
1496                  * for this rate on this channel */
1497                 target_power = user_target_power;
1498                 if (target_power > power_limit)
1499                         target_power = power_limit;
1500
1501                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
1502                                   i, saturation_power - back_off_table[i],
1503                                   current_regulatory, user_target_power,
1504                                   target_power);
1505
1506                 /* for each of 2 Tx chains (radio transmitters) */
1507                 for (c = 0; c < 2; c++) {
1508                         s32 atten_value;
1509
1510                         if (is_mimo_rate)
1511                                 atten_value =
1512                                     (s32)le32_to_cpu(priv->card_alive_init.
1513                                     tx_atten[txatten_grp][c]);
1514                         else
1515                                 atten_value = 0;
1516
1517                         /* calculate index; higher index means lower txpower */
1518                         power_index = (u8) (factory_gain_index[c] -
1519                                             (target_power -
1520                                              factory_actual_pwr[c]) -
1521                                             temperature_comp[c] -
1522                                             voltage_compensation +
1523                                             atten_value);
1524
1525 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
1526                                                 power_index); */
1527
1528                         if (power_index < get_min_power_index(i, band))
1529                                 power_index = get_min_power_index(i, band);
1530
1531                         /* adjust 5 GHz index to support negative indexes */
1532                         if (!band)
1533                                 power_index += 9;
1534
1535                         /* CCK, rate 32, reduce txpower for CCK */
1536                         if (i == POWER_TABLE_CCK_ENTRY)
1537                                 power_index +=
1538                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
1539
1540                         /* stay within the table! */
1541                         if (power_index > 107) {
1542                                 IWL_WARNING("txpower index %d > 107\n",
1543                                             power_index);
1544                                 power_index = 107;
1545                         }
1546                         if (power_index < 0) {
1547                                 IWL_WARNING("txpower index %d < 0\n",
1548                                             power_index);
1549                                 power_index = 0;
1550                         }
1551
1552                         /* fill txpower command for this rate/chain */
1553                         tx_power.s.radio_tx_gain[c] =
1554                                 gain_table[band][power_index].radio;
1555                         tx_power.s.dsp_predis_atten[c] =
1556                                 gain_table[band][power_index].dsp;
1557
1558                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
1559                                           "gain 0x%02x dsp %d\n",
1560                                           c, atten_value, power_index,
1561                                         tx_power.s.radio_tx_gain[c],
1562                                         tx_power.s.dsp_predis_atten[c]);
1563                 }/* for each chain */
1564
1565                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
1566
1567         }/* for each rate */
1568
1569         return 0;
1570 }
1571
1572 /**
1573  * iwl4965_send_tx_power - Configure the TXPOWER level user limit
1574  *
1575  * Uses the active RXON for channel, band, and characteristics (fat, high)
1576  * The power limit is taken from priv->tx_power_user_lmt.
1577  */
1578 static int iwl4965_send_tx_power(struct iwl_priv *priv)
1579 {
1580         struct iwl4965_txpowertable_cmd cmd = { 0 };
1581         int ret;
1582         u8 band = 0;
1583         u8 is_fat = 0;
1584         u8 ctrl_chan_high = 0;
1585
1586         if (test_bit(STATUS_SCANNING, &priv->status)) {
1587                 /* If this gets hit a lot, switch it to a BUG() and catch
1588                  * the stack trace to find out who is calling this during
1589                  * a scan. */
1590                 IWL_WARNING("TX Power requested while scanning!\n");
1591                 return -EAGAIN;
1592         }
1593
1594         band = priv->band == IEEE80211_BAND_2GHZ;
1595
1596         is_fat =  is_fat_channel(priv->active_rxon.flags);
1597
1598         if (is_fat &&
1599             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1600                 ctrl_chan_high = 1;
1601
1602         cmd.band = band;
1603         cmd.channel = priv->active_rxon.channel;
1604
1605         ret = iwl4965_fill_txpower_tbl(priv, band,
1606                                 le16_to_cpu(priv->active_rxon.channel),
1607                                 is_fat, ctrl_chan_high, &cmd.tx_power);
1608         if (ret)
1609                 goto out;
1610
1611         ret = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
1612
1613 out:
1614         return ret;
1615 }
1616
1617 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
1618 {
1619         int ret = 0;
1620         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1621         const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1622         const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1623
1624         if ((rxon1->flags == rxon2->flags) &&
1625             (rxon1->filter_flags == rxon2->filter_flags) &&
1626             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1627             (rxon1->ofdm_ht_single_stream_basic_rates ==
1628              rxon2->ofdm_ht_single_stream_basic_rates) &&
1629             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1630              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1631             (rxon1->rx_chain == rxon2->rx_chain) &&
1632             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1633                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1634                 return 0;
1635         }
1636
1637         rxon_assoc.flags = priv->staging_rxon.flags;
1638         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1639         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1640         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1641         rxon_assoc.reserved = 0;
1642         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1643             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1644         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1645             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1646         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1647
1648         ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
1649                                      sizeof(rxon_assoc), &rxon_assoc, NULL);
1650         if (ret)
1651                 return ret;
1652
1653         return ret;
1654 }
1655
1656
1657 int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
1658 {
1659         int rc;
1660         u8 band = 0;
1661         u8 is_fat = 0;
1662         u8 ctrl_chan_high = 0;
1663         struct iwl4965_channel_switch_cmd cmd = { 0 };
1664         const struct iwl_channel_info *ch_info;
1665
1666         band = priv->band == IEEE80211_BAND_2GHZ;
1667
1668         ch_info = iwl_get_channel_info(priv, priv->band, channel);
1669
1670         is_fat = is_fat_channel(priv->staging_rxon.flags);
1671
1672         if (is_fat &&
1673             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1674                 ctrl_chan_high = 1;
1675
1676         cmd.band = band;
1677         cmd.expect_beacon = 0;
1678         cmd.channel = cpu_to_le16(channel);
1679         cmd.rxon_flags = priv->active_rxon.flags;
1680         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
1681         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
1682         if (ch_info)
1683                 cmd.expect_beacon = is_channel_radar(ch_info);
1684         else
1685                 cmd.expect_beacon = 1;
1686
1687         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
1688                                       ctrl_chan_high, &cmd.tx_power);
1689         if (rc) {
1690                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
1691                 return rc;
1692         }
1693
1694         rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
1695         return rc;
1696 }
1697
1698 static int iwl4965_shared_mem_rx_idx(struct iwl_priv *priv)
1699 {
1700         struct iwl4965_shared *s = priv->shared_virt;
1701         return le32_to_cpu(s->rb_closed) & 0xFFF;
1702 }
1703
1704 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl_priv *priv,
1705                           struct iwl_frame *frame, u8 rate)
1706 {
1707         struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
1708         unsigned int frame_size;
1709
1710         tx_beacon_cmd = &frame->u.beacon;
1711         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
1712
1713         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
1714         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1715
1716         frame_size = iwl4965_fill_beacon_frame(priv,
1717                                 tx_beacon_cmd->frame,
1718                                 iwl_bcast_addr,
1719                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
1720
1721         BUG_ON(frame_size > MAX_MPDU_SIZE);
1722         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
1723
1724         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
1725                 tx_beacon_cmd->tx.rate_n_flags =
1726                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
1727         else
1728                 tx_beacon_cmd->tx.rate_n_flags =
1729                         iwl_hw_set_rate_n_flags(rate, 0);
1730
1731         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
1732                                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
1733         return (sizeof(*tx_beacon_cmd) + frame_size);
1734 }
1735
1736 static int iwl4965_alloc_shared_mem(struct iwl_priv *priv)
1737 {
1738         priv->shared_virt = pci_alloc_consistent(priv->pci_dev,
1739                                         sizeof(struct iwl4965_shared),
1740                                         &priv->shared_phys);
1741         if (!priv->shared_virt)
1742                 return -ENOMEM;
1743
1744         memset(priv->shared_virt, 0, sizeof(struct iwl4965_shared));
1745
1746         priv->rb_closed_offset = offsetof(struct iwl4965_shared, rb_closed);
1747
1748         return 0;
1749 }
1750
1751 static void iwl4965_free_shared_mem(struct iwl_priv *priv)
1752 {
1753         if (priv->shared_virt)
1754                 pci_free_consistent(priv->pci_dev,
1755                                     sizeof(struct iwl4965_shared),
1756                                     priv->shared_virt,
1757                                     priv->shared_phys);
1758 }
1759
1760 /**
1761  * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
1762  */
1763 static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
1764                                             struct iwl_tx_queue *txq,
1765                                             u16 byte_cnt)
1766 {
1767         int len;
1768         int txq_id = txq->q.id;
1769         struct iwl4965_shared *shared_data = priv->shared_virt;
1770
1771         len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
1772
1773         /* Set up byte count within first 256 entries */
1774         IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
1775                        tfd_offset[txq->q.write_ptr], byte_cnt, len);
1776
1777         /* If within first 64 entries, duplicate at end */
1778         if (txq->q.write_ptr < IWL49_MAX_WIN_SIZE)
1779                 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
1780                         tfd_offset[IWL49_QUEUE_SIZE + txq->q.write_ptr],
1781                         byte_cnt, len);
1782 }
1783
1784 /**
1785  * sign_extend - Sign extend a value using specified bit as sign-bit
1786  *
1787  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
1788  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
1789  *
1790  * @param oper value to sign extend
1791  * @param index 0 based bit index (0<=index<32) to sign bit
1792  */
1793 static s32 sign_extend(u32 oper, int index)
1794 {
1795         u8 shift = 31 - index;
1796
1797         return (s32)(oper << shift) >> shift;
1798 }
1799
1800 /**
1801  * iwl4965_hw_get_temperature - return the calibrated temperature (in Kelvin)
1802  * @statistics: Provides the temperature reading from the uCode
1803  *
1804  * A return of <0 indicates bogus data in the statistics
1805  */
1806 static int iwl4965_hw_get_temperature(const struct iwl_priv *priv)
1807 {
1808         s32 temperature;
1809         s32 vt;
1810         s32 R1, R2, R3;
1811         u32 R4;
1812
1813         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
1814                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
1815                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
1816                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
1817                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
1818                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
1819                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
1820         } else {
1821                 IWL_DEBUG_TEMP("Running temperature calibration\n");
1822                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
1823                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
1824                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
1825                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
1826         }
1827
1828         /*
1829          * Temperature is only 23 bits, so sign extend out to 32.
1830          *
1831          * NOTE If we haven't received a statistics notification yet
1832          * with an updated temperature, use R4 provided to us in the
1833          * "initialize" ALIVE response.
1834          */
1835         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
1836                 vt = sign_extend(R4, 23);
1837         else
1838                 vt = sign_extend(
1839                         le32_to_cpu(priv->statistics.general.temperature), 23);
1840
1841         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n", R1, R2, R3, vt);
1842
1843         if (R3 == R1) {
1844                 IWL_ERROR("Calibration conflict R1 == R3\n");
1845                 return -1;
1846         }
1847
1848         /* Calculate temperature in degrees Kelvin, adjust by 97%.
1849          * Add offset to center the adjustment around 0 degrees Centigrade. */
1850         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
1851         temperature /= (R3 - R1);
1852         temperature = (temperature * 97) / 100 + TEMPERATURE_CALIB_KELVIN_OFFSET;
1853
1854         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n",
1855                         temperature, KELVIN_TO_CELSIUS(temperature));
1856
1857         return temperature;
1858 }
1859
1860 /* Adjust Txpower only if temperature variance is greater than threshold. */
1861 #define IWL_TEMPERATURE_THRESHOLD   3
1862
1863 /**
1864  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
1865  *
1866  * If the temperature changed has changed sufficiently, then a recalibration
1867  * is needed.
1868  *
1869  * Assumes caller will replace priv->last_temperature once calibration
1870  * executed.
1871  */
1872 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
1873 {
1874         int temp_diff;
1875
1876         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
1877                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
1878                 return 0;
1879         }
1880
1881         temp_diff = priv->temperature - priv->last_temperature;
1882
1883         /* get absolute value */
1884         if (temp_diff < 0) {
1885                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
1886                 temp_diff = -temp_diff;
1887         } else if (temp_diff == 0)
1888                 IWL_DEBUG_POWER("Same temp, \n");
1889         else
1890                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
1891
1892         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
1893                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
1894                 return 0;
1895         }
1896
1897         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
1898
1899         return 1;
1900 }
1901
1902 static void iwl4965_temperature_calib(struct iwl_priv *priv)
1903 {
1904         s32 temp;
1905
1906         temp = iwl4965_hw_get_temperature(priv);
1907         if (temp < 0)
1908                 return;
1909
1910         if (priv->temperature != temp) {
1911                 if (priv->temperature)
1912                         IWL_DEBUG_TEMP("Temperature changed "
1913                                        "from %dC to %dC\n",
1914                                        KELVIN_TO_CELSIUS(priv->temperature),
1915                                        KELVIN_TO_CELSIUS(temp));
1916                 else
1917                         IWL_DEBUG_TEMP("Temperature "
1918                                        "initialized to %dC\n",
1919                                        KELVIN_TO_CELSIUS(temp));
1920         }
1921
1922         priv->temperature = temp;
1923         set_bit(STATUS_TEMPERATURE, &priv->status);
1924
1925         if (!priv->disable_tx_power_cal &&
1926              unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
1927              iwl4965_is_temp_calib_needed(priv))
1928                 queue_work(priv->workqueue, &priv->txpower_work);
1929 }
1930
1931 /**
1932  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
1933  */
1934 static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
1935                                             u16 txq_id)
1936 {
1937         /* Simply stop the queue, but don't change any configuration;
1938          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
1939         iwl_write_prph(priv,
1940                 IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
1941                 (0 << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE)|
1942                 (1 << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
1943 }
1944
1945 /**
1946  * txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE
1947  * priv->lock must be held by the caller
1948  */
1949 static int iwl4965_txq_agg_disable(struct iwl_priv *priv, u16 txq_id,
1950                                    u16 ssn_idx, u8 tx_fifo)
1951 {
1952         int ret = 0;
1953
1954         if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
1955             (IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES <= txq_id)) {
1956                 IWL_WARNING("queue number out of range: %d, must be %d to %d\n",
1957                         txq_id, IWL49_FIRST_AMPDU_QUEUE,
1958                         IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES - 1);
1959                 return -EINVAL;
1960         }
1961
1962         ret = iwl_grab_nic_access(priv);
1963         if (ret)
1964                 return ret;
1965
1966         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
1967
1968         iwl_clear_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
1969
1970         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
1971         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
1972         /* supposes that ssn_idx is valid (!= 0xFFF) */
1973         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
1974
1975         iwl_clear_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
1976         iwl_txq_ctx_deactivate(priv, txq_id);
1977         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
1978
1979         iwl_release_nic_access(priv);
1980
1981         return 0;
1982 }
1983
1984 /**
1985  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
1986  */
1987 static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
1988                                         u16 txq_id)
1989 {
1990         u32 tbl_dw_addr;
1991         u32 tbl_dw;
1992         u16 scd_q2ratid;
1993
1994         scd_q2ratid = ra_tid & IWL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
1995
1996         tbl_dw_addr = priv->scd_base_addr +
1997                         IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
1998
1999         tbl_dw = iwl_read_targ_mem(priv, tbl_dw_addr);
2000
2001         if (txq_id & 0x1)
2002                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
2003         else
2004                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
2005
2006         iwl_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
2007
2008         return 0;
2009 }
2010
2011
2012 /**
2013  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
2014  *
2015  * NOTE:  txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE,
2016  *        i.e. it must be one of the higher queues used for aggregation
2017  */
2018 static int iwl4965_txq_agg_enable(struct iwl_priv *priv, int txq_id,
2019                                   int tx_fifo, int sta_id, int tid, u16 ssn_idx)
2020 {
2021         unsigned long flags;
2022         int ret;
2023         u16 ra_tid;
2024
2025         if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
2026             (IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES <= txq_id)) {
2027                 IWL_WARNING("queue number out of range: %d, must be %d to %d\n",
2028                         txq_id, IWL49_FIRST_AMPDU_QUEUE,
2029                         IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES - 1);
2030                 return -EINVAL;
2031         }
2032
2033         ra_tid = BUILD_RAxTID(sta_id, tid);
2034
2035         /* Modify device's station table to Tx this TID */
2036         iwl_sta_modify_enable_tid_tx(priv, sta_id, tid);
2037
2038         spin_lock_irqsave(&priv->lock, flags);
2039         ret = iwl_grab_nic_access(priv);
2040         if (ret) {
2041                 spin_unlock_irqrestore(&priv->lock, flags);
2042                 return ret;
2043         }
2044
2045         /* Stop this Tx queue before configuring it */
2046         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
2047
2048         /* Map receiver-address / traffic-ID to this queue */
2049         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
2050
2051         /* Set this queue as a chain-building queue */
2052         iwl_set_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
2053
2054         /* Place first TFD at index corresponding to start sequence number.
2055          * Assumes that ssn_idx is valid (!= 0xFFF) */
2056         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
2057         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
2058         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
2059
2060         /* Set up Tx window size and frame limit for this queue */
2061         iwl_write_targ_mem(priv,
2062                 priv->scd_base_addr + IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
2063                 (SCD_WIN_SIZE << IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
2064                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
2065
2066         iwl_write_targ_mem(priv, priv->scd_base_addr +
2067                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
2068                 (SCD_FRAME_LIMIT << IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
2069                 & IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
2070
2071         iwl_set_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
2072
2073         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
2074         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
2075
2076         iwl_release_nic_access(priv);
2077         spin_unlock_irqrestore(&priv->lock, flags);
2078
2079         return 0;
2080 }
2081
2082 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
2083                              enum ieee80211_ampdu_mlme_action action,
2084                              const u8 *addr, u16 tid, u16 *ssn)
2085 {
2086         struct iwl_priv *priv = hw->priv;
2087         DECLARE_MAC_BUF(mac);
2088
2089         IWL_DEBUG_HT("A-MPDU action on addr %s tid %d\n",
2090                      print_mac(mac, addr), tid);
2091
2092         if (!(priv->cfg->sku & IWL_SKU_N))
2093                 return -EACCES;
2094
2095         switch (action) {
2096         case IEEE80211_AMPDU_RX_START:
2097                 IWL_DEBUG_HT("start Rx\n");
2098                 return iwl_rx_agg_start(priv, addr, tid, *ssn);
2099         case IEEE80211_AMPDU_RX_STOP:
2100                 IWL_DEBUG_HT("stop Rx\n");
2101                 return iwl_rx_agg_stop(priv, addr, tid);
2102         case IEEE80211_AMPDU_TX_START:
2103                 IWL_DEBUG_HT("start Tx\n");
2104                 return iwl_tx_agg_start(priv, addr, tid, ssn);
2105         case IEEE80211_AMPDU_TX_STOP:
2106                 IWL_DEBUG_HT("stop Tx\n");
2107                 return iwl_tx_agg_stop(priv, addr, tid);
2108         default:
2109                 IWL_DEBUG_HT("unknown\n");
2110                 return -EINVAL;
2111                 break;
2112         }
2113         return 0;
2114 }
2115
2116 static u16 iwl4965_get_hcmd_size(u8 cmd_id, u16 len)
2117 {
2118         switch (cmd_id) {
2119         case REPLY_RXON:
2120                 return (u16) sizeof(struct iwl4965_rxon_cmd);
2121         default:
2122                 return len;
2123         }
2124 }
2125
2126 static u16 iwl4965_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
2127 {
2128         struct iwl4965_addsta_cmd *addsta = (struct iwl4965_addsta_cmd *)data;
2129         addsta->mode = cmd->mode;
2130         memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
2131         memcpy(&addsta->key, &cmd->key, sizeof(struct iwl4965_keyinfo));
2132         addsta->station_flags = cmd->station_flags;
2133         addsta->station_flags_msk = cmd->station_flags_msk;
2134         addsta->tid_disable_tx = cmd->tid_disable_tx;
2135         addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
2136         addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
2137         addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
2138         addsta->reserved1 = __constant_cpu_to_le16(0);
2139         addsta->reserved2 = __constant_cpu_to_le32(0);
2140
2141         return (u16)sizeof(struct iwl4965_addsta_cmd);
2142 }
2143
2144 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2145 {
2146         return le32_to_cpup(&tx_resp->u.status + tx_resp->frame_count) & MAX_SN;
2147 }
2148
2149 /**
2150  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2151  */
2152 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2153                                       struct iwl_ht_agg *agg,
2154                                       struct iwl4965_tx_resp *tx_resp,
2155                                       int txq_id, u16 start_idx)
2156 {
2157         u16 status;
2158         struct agg_tx_status *frame_status = tx_resp->u.agg_status;
2159         struct ieee80211_tx_info *info = NULL;
2160         struct ieee80211_hdr *hdr = NULL;
2161         u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2162         int i, sh, idx;
2163         u16 seq;
2164         if (agg->wait_for_ba)
2165                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2166
2167         agg->frame_count = tx_resp->frame_count;
2168         agg->start_idx = start_idx;
2169         agg->rate_n_flags = rate_n_flags;
2170         agg->bitmap = 0;
2171
2172         /* # frames attempted by Tx command */
2173         if (agg->frame_count == 1) {
2174                 /* Only one frame was attempted; no block-ack will arrive */
2175                 status = le16_to_cpu(frame_status[0].status);
2176                 idx = start_idx;
2177
2178                 /* FIXME: code repetition */
2179                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2180                                    agg->frame_count, agg->start_idx, idx);
2181
2182                 info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb[0]);
2183                 info->status.retry_count = tx_resp->failure_frame;
2184                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
2185                 info->flags |= iwl_is_tx_success(status)?
2186                         IEEE80211_TX_STAT_ACK : 0;
2187                 iwl_hwrate_to_tx_control(priv, rate_n_flags, info);
2188                 /* FIXME: code repetition end */
2189
2190                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2191                                     status & 0xff, tx_resp->failure_frame);
2192                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n", rate_n_flags);
2193
2194                 agg->wait_for_ba = 0;
2195         } else {
2196                 /* Two or more frames were attempted; expect block-ack */
2197                 u64 bitmap = 0;
2198                 int start = agg->start_idx;
2199
2200                 /* Construct bit-map of pending frames within Tx window */
2201                 for (i = 0; i < agg->frame_count; i++) {
2202                         u16 sc;
2203                         status = le16_to_cpu(frame_status[i].status);
2204                         seq  = le16_to_cpu(frame_status[i].sequence);
2205                         idx = SEQ_TO_INDEX(seq);
2206                         txq_id = SEQ_TO_QUEUE(seq);
2207
2208                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2209                                       AGG_TX_STATE_ABORT_MSK))
2210                                 continue;
2211
2212                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2213                                            agg->frame_count, txq_id, idx);
2214
2215                         hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
2216
2217                         sc = le16_to_cpu(hdr->seq_ctrl);
2218                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2219                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
2220                                           " idx=%d, seq_idx=%d, seq=%d\n",
2221                                           idx, SEQ_TO_SN(sc),
2222                                           hdr->seq_ctrl);
2223                                 return -1;
2224                         }
2225
2226                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2227                                            i, idx, SEQ_TO_SN(sc));
2228
2229                         sh = idx - start;
2230                         if (sh > 64) {
2231                                 sh = (start - idx) + 0xff;
2232                                 bitmap = bitmap << sh;
2233                                 sh = 0;
2234                                 start = idx;
2235                         } else if (sh < -64)
2236                                 sh  = 0xff - (start - idx);
2237                         else if (sh < 0) {
2238                                 sh = start - idx;
2239                                 start = idx;
2240                                 bitmap = bitmap << sh;
2241                                 sh = 0;
2242                         }
2243                         bitmap |= (1 << sh);
2244                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
2245                                            start, (u32)(bitmap & 0xFFFFFFFF));
2246                 }
2247
2248                 agg->bitmap = bitmap;
2249                 agg->start_idx = start;
2250                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2251                                    agg->frame_count, agg->start_idx,
2252                                    (unsigned long long)agg->bitmap);
2253
2254                 if (bitmap)
2255                         agg->wait_for_ba = 1;
2256         }
2257         return 0;
2258 }
2259
2260 /**
2261  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2262  */
2263 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2264                                 struct iwl_rx_mem_buffer *rxb)
2265 {
2266         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2267         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2268         int txq_id = SEQ_TO_QUEUE(sequence);
2269         int index = SEQ_TO_INDEX(sequence);
2270         struct iwl_tx_queue *txq = &priv->txq[txq_id];
2271         struct ieee80211_tx_info *info;
2272         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2273         u32  status = le32_to_cpu(tx_resp->u.status);
2274         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
2275         __le16 fc;
2276         struct ieee80211_hdr *hdr;
2277         u8 *qc = NULL;
2278
2279         if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
2280                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2281                           "is out of range [0-%d] %d %d\n", txq_id,
2282                           index, txq->q.n_bd, txq->q.write_ptr,
2283                           txq->q.read_ptr);
2284                 return;
2285         }
2286
2287         info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]);
2288         memset(&info->status, 0, sizeof(info->status));
2289
2290         hdr = iwl_tx_queue_get_hdr(priv, txq_id, index);
2291         fc = hdr->frame_control;
2292         if (ieee80211_is_data_qos(fc)) {
2293                 qc = ieee80211_get_qos_ctl(hdr);
2294                 tid = qc[0] & 0xf;
2295         }
2296
2297         sta_id = iwl_get_ra_sta_id(priv, hdr);
2298         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2299                 IWL_ERROR("Station not known\n");
2300                 return;
2301         }
2302
2303         if (txq->sched_retry) {
2304                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2305                 struct iwl_ht_agg *agg = NULL;
2306
2307                 if (!qc)
2308                         return;
2309
2310                 agg = &priv->stations[sta_id].tid[tid].agg;
2311
2312                 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
2313
2314                 /* check if BAR is needed */
2315                 if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status))
2316                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
2317
2318                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2319                         int freed, ampdu_q;
2320                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2321                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
2322                                            "%d index %d\n", scd_ssn , index);
2323                         freed = iwl_tx_queue_reclaim(priv, txq_id, index);
2324                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2325
2326                         if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
2327                             txq_id >= 0 && priv->mac80211_registered &&
2328                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA) {
2329                                 /* calculate mac80211 ampdu sw queue to wake */
2330                                 ampdu_q = txq_id - IWL49_FIRST_AMPDU_QUEUE +
2331                                           priv->hw->queues;
2332                                 if (agg->state == IWL_AGG_OFF)
2333                                         ieee80211_wake_queue(priv->hw, txq_id);
2334                                 else
2335                                         ieee80211_wake_queue(priv->hw, ampdu_q);
2336                         }
2337                         iwl_txq_check_empty(priv, sta_id, tid, txq_id);
2338                 }
2339         } else {
2340                 info->status.retry_count = tx_resp->failure_frame;
2341                 info->flags |=
2342                         iwl_is_tx_success(status) ? IEEE80211_TX_STAT_ACK : 0;
2343                 iwl_hwrate_to_tx_control(priv,
2344                                         le32_to_cpu(tx_resp->rate_n_flags),
2345                                         info);
2346
2347                 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags "
2348                              "0x%x retries %d\n", txq_id,
2349                                 iwl_get_tx_fail_reason(status),
2350                                 status, le32_to_cpu(tx_resp->rate_n_flags),
2351                                 tx_resp->failure_frame);
2352
2353                 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
2354
2355                 if (index != -1) {
2356                     int freed = iwl_tx_queue_reclaim(priv, txq_id, index);
2357                     if (tid != MAX_TID_COUNT)
2358                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2359                     if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
2360                         (txq_id >= 0) && priv->mac80211_registered)
2361                         ieee80211_wake_queue(priv->hw, txq_id);
2362                     if (tid != MAX_TID_COUNT)
2363                         iwl_txq_check_empty(priv, sta_id, tid, txq_id);
2364                 }
2365         }
2366
2367         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
2368                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
2369 }
2370
2371
2372 /* Set up 4965-specific Rx frame reply handlers */
2373 static void iwl4965_rx_handler_setup(struct iwl_priv *priv)
2374 {
2375         /* Legacy Rx frames */
2376         priv->rx_handlers[REPLY_RX] = iwl_rx_reply_rx;
2377         /* Tx response */
2378         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
2379 }
2380
2381 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
2382 {
2383         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
2384 }
2385
2386 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
2387 {
2388         cancel_work_sync(&priv->txpower_work);
2389 }
2390
2391
2392 static struct iwl_hcmd_ops iwl4965_hcmd = {
2393         .rxon_assoc = iwl4965_send_rxon_assoc,
2394 };
2395
2396 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
2397         .get_hcmd_size = iwl4965_get_hcmd_size,
2398         .build_addsta_hcmd = iwl4965_build_addsta_hcmd,
2399         .chain_noise_reset = iwl4965_chain_noise_reset,
2400         .gain_computation = iwl4965_gain_computation,
2401         .rts_tx_cmd_flag = iwl4965_rts_tx_cmd_flag,
2402 };
2403
2404 static struct iwl_lib_ops iwl4965_lib = {
2405         .set_hw_params = iwl4965_hw_set_hw_params,
2406         .alloc_shared_mem = iwl4965_alloc_shared_mem,
2407         .free_shared_mem = iwl4965_free_shared_mem,
2408         .shared_mem_rx_idx = iwl4965_shared_mem_rx_idx,
2409         .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
2410         .txq_set_sched = iwl4965_txq_set_sched,
2411         .txq_agg_enable = iwl4965_txq_agg_enable,
2412         .txq_agg_disable = iwl4965_txq_agg_disable,
2413         .rx_handler_setup = iwl4965_rx_handler_setup,
2414         .setup_deferred_work = iwl4965_setup_deferred_work,
2415         .cancel_deferred_work = iwl4965_cancel_deferred_work,
2416         .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
2417         .alive_notify = iwl4965_alive_notify,
2418         .init_alive_start = iwl4965_init_alive_start,
2419         .load_ucode = iwl4965_load_bsm,
2420         .apm_ops = {
2421                 .init = iwl4965_apm_init,
2422                 .reset = iwl4965_apm_reset,
2423                 .stop = iwl4965_apm_stop,
2424                 .config = iwl4965_nic_config,
2425                 .set_pwr_src = iwl4965_set_pwr_src,
2426         },
2427         .eeprom_ops = {
2428                 .regulatory_bands = {
2429                         EEPROM_REGULATORY_BAND_1_CHANNELS,
2430                         EEPROM_REGULATORY_BAND_2_CHANNELS,
2431                         EEPROM_REGULATORY_BAND_3_CHANNELS,
2432                         EEPROM_REGULATORY_BAND_4_CHANNELS,
2433                         EEPROM_REGULATORY_BAND_5_CHANNELS,
2434                         EEPROM_4965_REGULATORY_BAND_24_FAT_CHANNELS,
2435                         EEPROM_4965_REGULATORY_BAND_52_FAT_CHANNELS
2436                 },
2437                 .verify_signature  = iwlcore_eeprom_verify_signature,
2438                 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
2439                 .release_semaphore = iwlcore_eeprom_release_semaphore,
2440                 .check_version = iwl4965_eeprom_check_version,
2441                 .query_addr = iwlcore_eeprom_query_addr,
2442         },
2443         .set_power = iwl4965_set_power,
2444         .send_tx_power  = iwl4965_send_tx_power,
2445         .update_chain_flags = iwl4965_update_chain_flags,
2446         .temperature = iwl4965_temperature_calib,
2447 };
2448
2449 static struct iwl_ops iwl4965_ops = {
2450         .lib = &iwl4965_lib,
2451         .hcmd = &iwl4965_hcmd,
2452         .utils = &iwl4965_hcmd_utils,
2453 };
2454
2455 struct iwl_cfg iwl4965_agn_cfg = {
2456         .name = "4965AGN",
2457         .fw_name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode",
2458         .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
2459         .eeprom_size = IWL4965_EEPROM_IMG_SIZE,
2460         .ops = &iwl4965_ops,
2461         .mod_params = &iwl4965_mod_params,
2462 };
2463
2464 /* Module firmware */
2465 MODULE_FIRMWARE("iwlwifi-4965" IWL4965_UCODE_API ".ucode");
2466
2467 module_param_named(antenna, iwl4965_mod_params.antenna, int, 0444);
2468 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
2469 module_param_named(disable, iwl4965_mod_params.disable, int, 0444);
2470 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
2471 module_param_named(swcrypto, iwl4965_mod_params.sw_crypto, int, 0444);
2472 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])\n");
2473 module_param_named(debug, iwl4965_mod_params.debug, int, 0444);
2474 MODULE_PARM_DESC(debug, "debug output mask");
2475 module_param_named(
2476         disable_hw_scan, iwl4965_mod_params.disable_hw_scan, int, 0444);
2477 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
2478
2479 module_param_named(queues_num, iwl4965_mod_params.num_of_queues, int, 0444);
2480 MODULE_PARM_DESC(queues_num, "number of hw queues.");
2481 /* QoS */
2482 module_param_named(qos_enable, iwl4965_mod_params.enable_qos, int, 0444);
2483 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
2484 /* 11n */
2485 module_param_named(11n_disable, iwl4965_mod_params.disable_11n, int, 0444);
2486 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
2487 module_param_named(amsdu_size_8K, iwl4965_mod_params.amsdu_size_8K, int, 0444);
2488 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
2489
2490 module_param_named(fw_restart4965, iwl4965_mod_params.restart_fw, int, 0444);
2491 MODULE_PARM_DESC(fw_restart4965, "restart firmware in case of error");