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
  51 /* module parameters */
  52 static struct iwl_mod_params iwl4965_mod_params = {
  53         .num_of_queues = IWL49_NUM_QUEUES,
  54         .enable_qos = 1,
  55         .amsdu_size_8K = 1,
  56         .restart_fw = 1,
  57         /* the rest are 0 by default */
  58 };
  59
  60 /* check contents of special bootstrap uCode SRAM */
  61 static int iwl4965_verify_bsm(struct iwl_priv *priv)
  62 {
  63         __le32 *image = priv->ucode_boot.v_addr;
  64         u32 len = priv->ucode_boot.len;
  65         u32 reg;
  66         u32 val;
  67
  68         IWL_DEBUG_INFO("Begin verify bsm\n");
  69
  70         /* verify BSM SRAM contents */
  71         val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
  72         for (reg = BSM_SRAM_LOWER_BOUND;
  73              reg < BSM_SRAM_LOWER_BOUND + len;
  74              reg += sizeof(u32), image++) {
  75                 val = iwl_read_prph(priv, reg);
  76                 if (val != le32_to_cpu(*image)) {
  77                         IWL_ERROR("BSM uCode verification failed at "
  78                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
  79                                   BSM_SRAM_LOWER_BOUND,
  80                                   reg - BSM_SRAM_LOWER_BOUND, len,
  81                                   val, le32_to_cpu(*image));
  82                         return -EIO;
  83                 }
  84         }
  85
  86         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
  87
  88         return 0;
  89 }
  90
  91 /**
  92  * iwl4965_load_bsm - Load bootstrap instructions
  93  *
  94  * BSM operation:
  95  *
  96  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
  97  * in special SRAM that does not power down during RFKILL.  When powering back
  98  * up after power-saving sleeps (or during initial uCode load), the BSM loads
  99  * the bootstrap program into the on-board processor, and starts it.
 100  *
 101  * The bootstrap program loads (via DMA) instructions and data for a new
 102  * program from host DRAM locations indicated by the host driver in the
 103  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
 104  * automatically.
 105  *
 106  * When initializing the NIC, the host driver points the BSM to the
 107  * "initialize" uCode image.  This uCode sets up some internal data, then
 108  * notifies host via "initialize alive" that it is complete.
 109  *
 110  * The host then replaces the BSM_DRAM_* pointer values to point to the
 111  * normal runtime uCode instructions and a backup uCode data cache buffer
 112  * (filled initially with starting data values for the on-board processor),
 113  * then triggers the "initialize" uCode to load and launch the runtime uCode,
 114  * which begins normal operation.
 115  *
 116  * When doing a power-save shutdown, runtime uCode saves data SRAM into
 117  * the backup data cache in DRAM before SRAM is powered down.
 118  *
 119  * When powering back up, the BSM loads the bootstrap program.  This reloads
 120  * the runtime uCode instructions and the backup data cache into SRAM,
 121  * and re-launches the runtime uCode from where it left off.
 122  */
 123 static int iwl4965_load_bsm(struct iwl_priv *priv)
 124 {
 125         __le32 *image = priv->ucode_boot.v_addr;
 126         u32 len = priv->ucode_boot.len;
 127         dma_addr_t pinst;
 128         dma_addr_t pdata;
 129         u32 inst_len;
 130         u32 data_len;
 131         int i;
 132         u32 done;
 133         u32 reg_offset;
 134         int ret;
 135
 136         IWL_DEBUG_INFO("Begin load bsm\n");
 137
 138         priv->ucode_type = UCODE_RT;
 139
 140         /* make sure bootstrap program is no larger than BSM's SRAM size */
 141         if (len > IWL_MAX_BSM_SIZE)
 142                 return -EINVAL;
 143
 144         /* Tell bootstrap uCode where to find the "Initialize" uCode
 145          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
 146          * NOTE:  iwl_init_alive_start() will replace these values,
 147          *        after the "initialize" uCode has run, to point to
 148          *        runtime/protocol instructions and backup data cache.
 149          */
 150         pinst = priv->ucode_init.p_addr >> 4;
 151         pdata = priv->ucode_init_data.p_addr >> 4;
 152         inst_len = priv->ucode_init.len;
 153         data_len = priv->ucode_init_data.len;
 154
 155         ret = iwl_grab_nic_access(priv);
 156         if (ret)
 157                 return ret;
 158
 159         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 160         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 161         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
 162         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
 163
 164         /* Fill BSM memory with bootstrap instructions */
 165         for (reg_offset = BSM_SRAM_LOWER_BOUND;
 166              reg_offset < BSM_SRAM_LOWER_BOUND + len;
 167              reg_offset += sizeof(u32), image++)
 168                 _iwl_write_prph(priv, reg_offset, le32_to_cpu(*image));
 169
 170         ret = iwl4965_verify_bsm(priv);
 171         if (ret) {
 172                 iwl_release_nic_access(priv);
 173                 return ret;
 174         }
 175
 176         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
 177         iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
 178         iwl_write_prph(priv, BSM_WR_MEM_DST_REG, RTC_INST_LOWER_BOUND);
 179         iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
 180
 181         /* Load bootstrap code into instruction SRAM now,
 182          *   to prepare to load "initialize" uCode */
 183         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);
 184
 185         /* Wait for load of bootstrap uCode to finish */
 186         for (i = 0; i < 100; i++) {
 187                 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
 188                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
 189                         break;
 190                 udelay(10);
 191         }
 192         if (i < 100)
 193                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
 194         else {
 195                 IWL_ERROR("BSM write did not complete!\n");
 196                 return -EIO;
 197         }
 198
 199         /* Enable future boot loads whenever power management unit triggers it
 200          *   (e.g. when powering back up after power-save shutdown) */
 201         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
 202
 203         iwl_release_nic_access(priv);
 204
 205         return 0;
 206 }
 207
 208 /**
 209  * iwl4965_set_ucode_ptrs - Set uCode address location
 210  *
 211  * Tell initialization uCode where to find runtime uCode.
 212  *
 213  * BSM registers initially contain pointers to initialization uCode.
 214  * We need to replace them to load runtime uCode inst and data,
 215  * and to save runtime data when powering down.
 216  */
 217 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
 218 {
 219         dma_addr_t pinst;
 220         dma_addr_t pdata;
 221         unsigned long flags;
 222         int ret = 0;
 223
 224         /* bits 35:4 for 4965 */
 225         pinst = priv->ucode_code.p_addr >> 4;
 226         pdata = priv->ucode_data_backup.p_addr >> 4;
 227
 228         spin_lock_irqsave(&priv->lock, flags);
 229         ret = iwl_grab_nic_access(priv);
 230         if (ret) {
 231                 spin_unlock_irqrestore(&priv->lock, flags);
 232                 return ret;
 233         }
 234
 235         /* Tell bootstrap uCode where to find image to load */
 236         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 237         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 238         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
 239                                  priv->ucode_data.len);
 240
 241         /* Inst bytecount must be last to set up, bit 31 signals uCode
 242          *   that all new ptr/size info is in place */
 243         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
 244                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
 245         iwl_release_nic_access(priv);
 246
 247         spin_unlock_irqrestore(&priv->lock, flags);
 248
 249         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
 250
 251         return ret;
 252 }
 253
 254 /**
 255  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
 256  *
 257  * Called after REPLY_ALIVE notification received from "initialize" uCode.
 258  *
 259  * The 4965 "initialize" ALIVE reply contains calibration data for:
 260  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
 261  *   (3945 does not contain this data).
 262  *
 263  * Tell "initialize" uCode to go ahead and load the runtime uCode.
 264 */
 265 static void iwl4965_init_alive_start(struct iwl_priv *priv)
 266 {
 267         /* Check alive response for "valid" sign from uCode */
 268         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
 269                 /* We had an error bringing up the hardware, so take it
 270                  * all the way back down so we can try again */
 271                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
 272                 goto restart;
 273         }
 274
 275         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
 276          * This is a paranoid check, because we would not have gotten the
 277          * "initialize" alive if code weren't properly loaded.  */
 278         if (iwl_verify_ucode(priv)) {
 279                 /* Runtime instruction load was bad;
 280                  * take it all the way back down so we can try again */
 281                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
 282                 goto restart;
 283         }
 284
 285         /* Calculate temperature */
 286         priv->temperature = iwl4965_get_temperature(priv);
 287
 288         /* Send pointers to protocol/runtime uCode image ... init code will
 289          * load and launch runtime uCode, which will send us another "Alive"
 290          * notification. */
 291         IWL_DEBUG_INFO("Initialization Alive received.\n");
 292         if (iwl4965_set_ucode_ptrs(priv)) {
 293                 /* Runtime instruction load won't happen;
 294                  * take it all the way back down so we can try again */
 295                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
 296                 goto restart;
 297         }
 298         return;
 299
 300 restart:
 301         queue_work(priv->workqueue, &priv->restart);
 302 }
 303
 304 static int is_fat_channel(__le32 rxon_flags)
 305 {
 306         return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
 307                 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
 308 }
 309
 310 int iwl4965_hwrate_to_plcp_idx(u32 rate_n_flags)
 311 {
 312         int idx = 0;
 313
 314         /* 4965 HT rate format */
 315         if (rate_n_flags & RATE_MCS_HT_MSK) {
 316                 idx = (rate_n_flags & 0xff);
 317
 318                 if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 319                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 320
 321                 idx += IWL_FIRST_OFDM_RATE;
 322                 /* skip 9M not supported in ht*/
 323                 if (idx >= IWL_RATE_9M_INDEX)
 324                         idx += 1;
 325                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 326                         return idx;
 327
 328         /* 4965 legacy rate format, search for match in table */
 329         } else {
 330                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 331                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 332                                 return idx;
 333         }
 334
 335         return -1;
 336 }
 337
 338 /**
 339  * translate ucode response to mac80211 tx status control values
 340  */
 341 void iwl4965_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 342                                   struct ieee80211_tx_info *control)
 343 {
 344         int rate_index;
 345
 346         control->antenna_sel_tx =
 347                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 348         if (rate_n_flags & RATE_MCS_HT_MSK)
 349                 control->flags |= IEEE80211_TX_CTL_OFDM_HT;
 350         if (rate_n_flags & RATE_MCS_GF_MSK)
 351                 control->flags |= IEEE80211_TX_CTL_GREEN_FIELD;
 352         if (rate_n_flags & RATE_MCS_FAT_MSK)
 353                 control->flags |= IEEE80211_TX_CTL_40_MHZ_WIDTH;
 354         if (rate_n_flags & RATE_MCS_DUP_MSK)
 355                 control->flags |= IEEE80211_TX_CTL_DUP_DATA;
 356         if (rate_n_flags & RATE_MCS_SGI_MSK)
 357                 control->flags |= IEEE80211_TX_CTL_SHORT_GI;
 358         rate_index = iwl4965_hwrate_to_plcp_idx(rate_n_flags);
 359         if (control->band == IEEE80211_BAND_5GHZ)
 360                 rate_index -= IWL_FIRST_OFDM_RATE;
 361         control->tx_rate_idx = rate_index;
 362 }
 363
 364 /*
 365  * EEPROM handlers
 366  */
 367
 368 static int iwl4965_eeprom_check_version(struct iwl_priv *priv)
 369 {
 370         u16 eeprom_ver;
 371         u16 calib_ver;
 372
 373         eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
 374
 375         calib_ver = iwl_eeprom_query16(priv, EEPROM_4965_CALIB_VERSION_OFFSET);
 376
 377         if (eeprom_ver < EEPROM_4965_EEPROM_VERSION ||
 378             calib_ver < EEPROM_4965_TX_POWER_VERSION)
 379                 goto err;
 380
 381         return 0;
 382 err:
 383         IWL_ERROR("Unsuported EEPROM VER=0x%x < 0x%x CALIB=0x%x < 0x%x\n",
 384                   eeprom_ver, EEPROM_4965_EEPROM_VERSION,
 385                   calib_ver, EEPROM_4965_TX_POWER_VERSION);
 386         return -EINVAL;
 387
 388 }
 389 int iwl4965_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 390 {
 391         int ret;
 392         unsigned long flags;
 393
 394         spin_lock_irqsave(&priv->lock, flags);
 395         ret = iwl_grab_nic_access(priv);
 396         if (ret) {
 397                 spin_unlock_irqrestore(&priv->lock, flags);
 398                 return ret;
 399         }
 400
 401         if (src == IWL_PWR_SRC_VAUX) {
 402                 u32 val;
 403                 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
 404                                             &val);
 405
 406                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) {
 407                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 408                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 409                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 410                 }
 411         } else {
 412                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 413                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 414                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 415         }
 416
 417         iwl_release_nic_access(priv);
 418         spin_unlock_irqrestore(&priv->lock, flags);
 419
 420         return ret;
 421 }
 422
 423 /*
 424  * Activate/Deactivat Tx DMA/FIFO channels according tx fifos mask
 425  * must be called under priv->lock and mac access
 426  */
 427 static void iwl4965_txq_set_sched(struct iwl_priv *priv, u32 mask)
 428 {
 429         iwl_write_prph(priv, IWL49_SCD_TXFACT, mask);
 430 }
 431
 432 static int iwl4965_apm_init(struct iwl_priv *priv)
 433 {
 434         int ret = 0;
 435
 436         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 437                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 438
 439         /* disable L0s without affecting L1 :don't wait for ICH L0s bug W/A) */
 440         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 441                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
 442
 443         /* set "initialization complete" bit to move adapter
 444          * D0U* --> D0A* state */
 445         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 446
 447         /* wait for clock stabilization */
 448         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
 449                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 450                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 451         if (ret < 0) {
 452                 IWL_DEBUG_INFO("Failed to init the card\n");
 453                 goto out;
 454         }
 455
 456         ret = iwl_grab_nic_access(priv);
 457         if (ret)
 458                 goto out;
 459
 460         /* enable DMA */
 461         iwl_write_prph(priv, APMG_CLK_CTRL_REG, APMG_CLK_VAL_DMA_CLK_RQT |
 462                                                 APMG_CLK_VAL_BSM_CLK_RQT);
 463
 464         udelay(20);
 465
 466         /* disable L1-Active */
 467         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 468                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 469
 470         iwl_release_nic_access(priv);
 471 out:
 472         return ret;
 473 }
 474
 475
 476 static void iwl4965_nic_config(struct iwl_priv *priv)
 477 {
 478         unsigned long flags;
 479         u32 val;
 480         u16 radio_cfg;
 481         u8 val_link;
 482
 483         spin_lock_irqsave(&priv->lock, flags);
 484
 485         if ((priv->rev_id & 0x80) == 0x80 && (priv->rev_id & 0x7f) < 8) {
 486                 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 487                 /* Enable No Snoop field */
 488                 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
 489                                        val & ~(1 << 11));
 490         }
 491
 492         pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
 493
 494         /* L1 is enabled by BIOS */
 495         if ((val_link & PCI_LINK_VAL_L1_EN) == PCI_LINK_VAL_L1_EN)
 496                 /* diable L0S disabled L1A enabled */
 497                 iwl_set_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 498         else
 499                 /* L0S enabled L1A disabled */
 500                 iwl_clear_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 501
 502         radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
 503
 504         /* write radio config values to register */
 505         if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) == EEPROM_4965_RF_CFG_TYPE_MAX)
 506                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 507                             EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
 508                             EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
 509                             EEPROM_RF_CFG_DASH_MSK(radio_cfg));
 510
 511         /* set CSR_HW_CONFIG_REG for uCode use */
 512         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 513                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 514                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
 515
 516         priv->calib_info = (struct iwl_eeprom_calib_info *)
 517                 iwl_eeprom_query_addr(priv, EEPROM_4965_CALIB_TXPOWER_OFFSET);
 518
 519         spin_unlock_irqrestore(&priv->lock, flags);
 520 }
 521
 522 static int iwl4965_apm_stop_master(struct iwl_priv *priv)
 523 {
 524         int ret = 0;
 525         unsigned long flags;
 526
 527         spin_lock_irqsave(&priv->lock, flags);
 528
 529         /* set stop master bit */
 530         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 531
 532         ret = iwl_poll_bit(priv, CSR_RESET,
 533                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
 534                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 535         if (ret < 0)
 536                 goto out;
 537
 538 out:
 539         spin_unlock_irqrestore(&priv->lock, flags);
 540         IWL_DEBUG_INFO("stop master\n");
 541
 542         return ret;
 543 }
 544
 545 static void iwl4965_apm_stop(struct iwl_priv *priv)
 546 {
 547         unsigned long flags;
 548
 549         iwl4965_apm_stop_master(priv);
 550
 551         spin_lock_irqsave(&priv->lock, flags);
 552
 553         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 554
 555         udelay(10);
 556
 557         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 558         spin_unlock_irqrestore(&priv->lock, flags);
 559 }
 560
 561 static int iwl4965_apm_reset(struct iwl_priv *priv)
 562 {
 563         int ret = 0;
 564         unsigned long flags;
 565
 566         iwl4965_apm_stop_master(priv);
 567
 568         spin_lock_irqsave(&priv->lock, flags);
 569
 570         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 571
 572         udelay(10);
 573
 574         /* FIXME: put here L1A -L0S w/a */
 575
 576         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 577
 578         ret = iwl_poll_bit(priv, CSR_RESET,
 579                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 580                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
 581
 582         if (ret)
 583                 goto out;
 584
 585         udelay(10);
 586
 587         ret = iwl_grab_nic_access(priv);
 588         if (ret)
 589                 goto out;
 590         /* Enable DMA and BSM Clock */
 591         iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT |
 592                                               APMG_CLK_VAL_BSM_CLK_RQT);
 593
 594         udelay(10);
 595
 596         /* disable L1A */
 597         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 598                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 599
 600         iwl_release_nic_access(priv);
 601
 602         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 603         wake_up_interruptible(&priv->wait_command_queue);
 604
 605 out:
 606         spin_unlock_irqrestore(&priv->lock, flags);
 607
 608         return ret;
 609 }
 610
 611 #define REG_RECALIB_PERIOD (60)
 612
 613 void iwl4965_rf_kill_ct_config(struct iwl_priv *priv)
 614 {
 615         struct iwl4965_ct_kill_config cmd;
 616         unsigned long flags;
 617         int ret = 0;
 618
 619         spin_lock_irqsave(&priv->lock, flags);
 620         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 621                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 622         spin_unlock_irqrestore(&priv->lock, flags);
 623
 624         cmd.critical_temperature_R =
 625                 cpu_to_le32(priv->hw_params.ct_kill_threshold);
 626
 627         ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
 628                                sizeof(cmd), &cmd);
 629         if (ret)
 630                 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
 631         else
 632                 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded, "
 633                         "critical temperature is %d\n",
 634                         cmd.critical_temperature_R);
 635 }
 636
 637 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
 638  * Called after every association, but this runs only once!
 639  *  ... once chain noise is calibrated the first time, it's good forever.  */
 640 static void iwl4965_chain_noise_reset(struct iwl_priv *priv)
 641 {
 642         struct iwl_chain_noise_data *data = &(priv->chain_noise_data);
 643
 644         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
 645                 struct iwl4965_calibration_cmd cmd;
 646
 647                 memset(&cmd, 0, sizeof(cmd));
 648                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
 649                 cmd.diff_gain_a = 0;
 650                 cmd.diff_gain_b = 0;
 651                 cmd.diff_gain_c = 0;
 652                 if (iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 653                                  sizeof(cmd), &cmd))
 654                         IWL_ERROR("Could not send REPLY_PHY_CALIBRATION_CMD\n");
 655                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
 656                 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
 657         }
 658 }
 659
 660 static void iwl4965_gain_computation(struct iwl_priv *priv,
 661                 u32 *average_noise,
 662                 u16 min_average_noise_antenna_i,
 663                 u32 min_average_noise)
 664 {
 665         int i, ret;
 666         struct iwl_chain_noise_data *data = &priv->chain_noise_data;
 667
 668         data->delta_gain_code[min_average_noise_antenna_i] = 0;
 669
 670         for (i = 0; i < NUM_RX_CHAINS; i++) {
 671                 s32 delta_g = 0;
 672
 673                 if (!(data->disconn_array[i]) &&
 674                     (data->delta_gain_code[i] ==
 675                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
 676                         delta_g = average_noise[i] - min_average_noise;
 677                         data->delta_gain_code[i] = (u8)((delta_g * 10) / 15);
 678                         data->delta_gain_code[i] =
 679                                 min(data->delta_gain_code[i],
 680                                 (u8) CHAIN_NOISE_MAX_DELTA_GAIN_CODE);
 681
 682                         data->delta_gain_code[i] =
 683                                 (data->delta_gain_code[i] | (1 << 2));
 684                 } else {
 685                         data->delta_gain_code[i] = 0;
 686                 }
 687         }
 688         IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
 689                      data->delta_gain_code[0],
 690                      data->delta_gain_code[1],
 691                      data->delta_gain_code[2]);
 692
 693         /* Differential gain gets sent to uCode only once */
 694         if (!data->radio_write) {
 695                 struct iwl4965_calibration_cmd cmd;
 696                 data->radio_write = 1;
 697
 698                 memset(&cmd, 0, sizeof(cmd));
 699                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
 700                 cmd.diff_gain_a = data->delta_gain_code[0];
 701                 cmd.diff_gain_b = data->delta_gain_code[1];
 702                 cmd.diff_gain_c = data->delta_gain_code[2];
 703                 ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 704                                       sizeof(cmd), &cmd);
 705                 if (ret)
 706                         IWL_DEBUG_CALIB("fail sending cmd "
 707                                      "REPLY_PHY_CALIBRATION_CMD \n");
 708
 709                 /* TODO we might want recalculate
 710                  * rx_chain in rxon cmd */
 711
 712                 /* Mark so we run this algo only once! */
 713                 data->state = IWL_CHAIN_NOISE_CALIBRATED;
 714         }
 715         data->chain_noise_a = 0;
 716         data->chain_noise_b = 0;
 717         data->chain_noise_c = 0;
 718         data->chain_signal_a = 0;
 719         data->chain_signal_b = 0;
 720         data->chain_signal_c = 0;
 721         data->beacon_count = 0;
 722 }
 723
 724 static void iwl4965_bg_txpower_work(struct work_struct *work)
 725 {
 726         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 727                         txpower_work);
 728
 729         /* If a scan happened to start before we got here
 730          * then just return; the statistics notification will
 731          * kick off another scheduled work to compensate for
 732          * any temperature delta we missed here. */
 733         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 734             test_bit(STATUS_SCANNING, &priv->status))
 735                 return;
 736
 737         mutex_lock(&priv->mutex);
 738
 739         /* Regardless of if we are assocaited, we must reconfigure the
 740          * TX power since frames can be sent on non-radar channels while
 741          * not associated */
 742         iwl4965_send_tx_power(priv);
 743
 744         /* Update last_temperature to keep is_calib_needed from running
 745          * when it isn't needed... */
 746         priv->last_temperature = priv->temperature;
 747
 748         mutex_unlock(&priv->mutex);
 749 }
 750
 751 /*
 752  * Acquire priv->lock before calling this function !
 753  */
 754 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
 755 {
 756         iwl_write_direct32(priv, HBUS_TARG_WRPTR,
 757                              (index & 0xff) | (txq_id << 8));
 758         iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(txq_id), index);
 759 }
 760
 761 /**
 762  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
 763  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
 764  * @scd_retry: (1) Indicates queue will be used in aggregation mode
 765  *
 766  * NOTE:  Acquire priv->lock before calling this function !
 767  */
 768 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
 769                                         struct iwl_tx_queue *txq,
 770                                         int tx_fifo_id, int scd_retry)
 771 {
 772         int txq_id = txq->q.id;
 773
 774         /* Find out whether to activate Tx queue */
 775         int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
 776
 777         /* Set up and activate */
 778         iwl_write_prph(priv, IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
 779                          (active << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
 780                          (tx_fifo_id << IWL49_SCD_QUEUE_STTS_REG_POS_TXF) |
 781                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_WSL) |
 782                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
 783                          IWL49_SCD_QUEUE_STTS_REG_MSK);
 784
 785         txq->sched_retry = scd_retry;
 786
 787         IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
 788                        active ? "Activate" : "Deactivate",
 789                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
 790 }
 791
 792 static const u16 default_queue_to_tx_fifo[] = {
 793         IWL_TX_FIFO_AC3,
 794         IWL_TX_FIFO_AC2,
 795         IWL_TX_FIFO_AC1,
 796         IWL_TX_FIFO_AC0,
 797         IWL49_CMD_FIFO_NUM,
 798         IWL_TX_FIFO_HCCA_1,
 799         IWL_TX_FIFO_HCCA_2
 800 };
 801
 802 int iwl4965_alive_notify(struct iwl_priv *priv)
 803 {
 804         u32 a;
 805         int i = 0;
 806         unsigned long flags;
 807         int ret;
 808
 809         spin_lock_irqsave(&priv->lock, flags);
 810
 811         ret = iwl_grab_nic_access(priv);
 812         if (ret) {
 813                 spin_unlock_irqrestore(&priv->lock, flags);
 814                 return ret;
 815         }
 816
 817         /* Clear 4965's internal Tx Scheduler data base */
 818         priv->scd_base_addr = iwl_read_prph(priv, IWL49_SCD_SRAM_BASE_ADDR);
 819         a = priv->scd_base_addr + IWL49_SCD_CONTEXT_DATA_OFFSET;
 820         for (; a < priv->scd_base_addr + IWL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
 821                 iwl_write_targ_mem(priv, a, 0);
 822         for (; a < priv->scd_base_addr + IWL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
 823                 iwl_write_targ_mem(priv, a, 0);
 824         for (; a < sizeof(u16) * priv->hw_params.max_txq_num; a += 4)
 825                 iwl_write_targ_mem(priv, a, 0);
 826
 827         /* Tel 4965 where to find Tx byte count tables */
 828         iwl_write_prph(priv, IWL49_SCD_DRAM_BASE_ADDR,
 829                 (priv->shared_phys +
 830                  offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
 831
 832         /* Disable chain mode for all queues */
 833         iwl_write_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, 0);
 834
 835         /* Initialize each Tx queue (including the command queue) */
 836         for (i = 0; i < priv->hw_params.max_txq_num; i++) {
 837
 838                 /* TFD circular buffer read/write indexes */
 839                 iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(i), 0);
 840                 iwl_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
 841
 842                 /* Max Tx Window size for Scheduler-ACK mode */
 843                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 844                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i),
 845                                 (SCD_WIN_SIZE <<
 846                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
 847                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
 848
 849                 /* Frame limit */
 850                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 851                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
 852                                 sizeof(u32),
 853                                 (SCD_FRAME_LIMIT <<
 854                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
 855                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
 856
 857         }
 858         iwl_write_prph(priv, IWL49_SCD_INTERRUPT_MASK,
 859                                  (1 << priv->hw_params.max_txq_num) - 1);
 860
 861         /* Activate all Tx DMA/FIFO channels */
 862         priv->cfg->ops->lib->txq_set_sched(priv, IWL_MASK(0, 7));
 863
 864         iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
 865
 866         /* Map each Tx/cmd queue to its corresponding fifo */
 867         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
 868                 int ac = default_queue_to_tx_fifo[i];
 869                 iwl_txq_ctx_activate(priv, i);
 870                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
 871         }
 872
 873         iwl_release_nic_access(priv);
 874         spin_unlock_irqrestore(&priv->lock, flags);
 875
 876         return ret;
 877 }
 878
 879 static struct iwl_sensitivity_ranges iwl4965_sensitivity = {
 880         .min_nrg_cck = 97,
 881         .max_nrg_cck = 0,
 882
 883         .auto_corr_min_ofdm = 85,
 884         .auto_corr_min_ofdm_mrc = 170,
 885         .auto_corr_min_ofdm_x1 = 105,
 886         .auto_corr_min_ofdm_mrc_x1 = 220,
 887
 888         .auto_corr_max_ofdm = 120,
 889         .auto_corr_max_ofdm_mrc = 210,
 890         .auto_corr_max_ofdm_x1 = 140,
 891         .auto_corr_max_ofdm_mrc_x1 = 270,
 892
 893         .auto_corr_min_cck = 125,
 894         .auto_corr_max_cck = 200,
 895         .auto_corr_min_cck_mrc = 200,
 896         .auto_corr_max_cck_mrc = 400,
 897
 898         .nrg_th_cck = 100,
 899         .nrg_th_ofdm = 100,
 900 };
 901
 902 /**
 903  * iwl4965_hw_set_hw_params
 904  *
 905  * Called when initializing driver
 906  */
 907 int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
 908 {
 909
 910         if ((priv->cfg->mod_params->num_of_queues > IWL49_NUM_QUEUES) ||
 911             (priv->cfg->mod_params->num_of_queues < IWL_MIN_NUM_QUEUES)) {
 912                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
 913                           IWL_MIN_NUM_QUEUES, IWL49_NUM_QUEUES);
 914                 return -EINVAL;
 915         }
 916
 917         priv->hw_params.max_txq_num = priv->cfg->mod_params->num_of_queues;
 918         priv->hw_params.first_ampdu_q = IWL49_FIRST_AMPDU_QUEUE;
 919         priv->hw_params.sw_crypto = priv->cfg->mod_params->sw_crypto;
 920         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
 921         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
 922         if (priv->cfg->mod_params->amsdu_size_8K)
 923                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
 924         else
 925                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
 926         priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
 927         priv->hw_params.max_stations = IWL4965_STATION_COUNT;
 928         priv->hw_params.bcast_sta_id = IWL4965_BROADCAST_ID;
 929
 930         priv->hw_params.max_data_size = IWL49_RTC_DATA_SIZE;
 931         priv->hw_params.max_inst_size = IWL49_RTC_INST_SIZE;
 932         priv->hw_params.max_bsm_size = BSM_SRAM_SIZE;
 933         priv->hw_params.fat_channel = BIT(IEEE80211_BAND_5GHZ);
 934
 935         priv->hw_params.tx_chains_num = 2;
 936         priv->hw_params.rx_chains_num = 2;
 937         priv->hw_params.valid_tx_ant = ANT_A | ANT_B;
 938         priv->hw_params.valid_rx_ant = ANT_A | ANT_B;
 939         priv->hw_params.ct_kill_threshold = CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD);
 940
 941         priv->hw_params.sens = &iwl4965_sensitivity;
 942
 943         return 0;
 944 }
 945
 946 /* set card power command */
 947 static int iwl4965_set_power(struct iwl_priv *priv,
 948                       void *cmd)
 949 {
 950         int ret = 0;
 951
 952         ret = iwl_send_cmd_pdu_async(priv, POWER_TABLE_CMD,
 953                                     sizeof(struct iwl4965_powertable_cmd),
 954                                     cmd, NULL);
 955         return ret;
 956 }
 957
 958 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
 959 {
 960         s32 sign = 1;
 961
 962         if (num < 0) {
 963                 sign = -sign;
 964                 num = -num;
 965         }
 966         if (denom < 0) {
 967                 sign = -sign;
 968                 denom = -denom;
 969         }
 970         *res = 1;
 971         *res = ((num * 2 + denom) / (denom * 2)) * sign;
 972
 973         return 1;
 974 }
 975
 976 /**
 977  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
 978  *
 979  * Determines power supply voltage compensation for txpower calculations.
 980  * Returns number of 1/2-dB steps to subtract from gain table index,
 981  * to compensate for difference between power supply voltage during
 982  * factory measurements, vs. current power supply voltage.
 983  *
 984  * Voltage indication is higher for lower voltage.
 985  * Lower voltage requires more gain (lower gain table index).
 986  */
 987 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
 988                                             s32 current_voltage)
 989 {
 990         s32 comp = 0;
 991
 992         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
 993             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
 994                 return 0;
 995
 996         iwl4965_math_div_round(current_voltage - eeprom_voltage,
 997                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
 998
 999         if (current_voltage > eeprom_voltage)
1000                 comp *= 2;
1001         if ((comp < -2) || (comp > 2))
1002                 comp = 0;
1003
1004         return comp;
1005 }
1006
1007 static s32 iwl4965_get_tx_atten_grp(u16 channel)
1008 {
1009         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
1010             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
1011                 return CALIB_CH_GROUP_5;
1012
1013         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
1014             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
1015                 return CALIB_CH_GROUP_1;
1016
1017         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
1018             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
1019                 return CALIB_CH_GROUP_2;
1020
1021         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
1022             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
1023                 return CALIB_CH_GROUP_3;
1024
1025         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
1026             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
1027                 return CALIB_CH_GROUP_4;
1028
1029         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
1030         return -1;
1031 }
1032
1033 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
1034 {
1035         s32 b = -1;
1036
1037         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
1038                 if (priv->calib_info->band_info[b].ch_from == 0)
1039                         continue;
1040
1041                 if ((channel >= priv->calib_info->band_info[b].ch_from)
1042                     && (channel <= priv->calib_info->band_info[b].ch_to))
1043                         break;
1044         }
1045
1046         return b;
1047 }
1048
1049 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
1050 {
1051         s32 val;
1052
1053         if (x2 == x1)
1054                 return y1;
1055         else {
1056                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
1057                 return val + y2;
1058         }
1059 }
1060
1061 /**
1062  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
1063  *
1064  * Interpolates factory measurements from the two sample channels within a
1065  * sub-band, to apply to channel of interest.  Interpolation is proportional to
1066  * differences in channel frequencies, which is proportional to differences
1067  * in channel number.
1068  */
1069 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
1070                                     struct iwl_eeprom_calib_ch_info *chan_info)
1071 {
1072         s32 s = -1;
1073         u32 c;
1074         u32 m;
1075         const struct iwl_eeprom_calib_measure *m1;
1076         const struct iwl_eeprom_calib_measure *m2;
1077         struct iwl_eeprom_calib_measure *omeas;
1078         u32 ch_i1;
1079         u32 ch_i2;
1080
1081         s = iwl4965_get_sub_band(priv, channel);
1082         if (s >= EEPROM_TX_POWER_BANDS) {
1083                 IWL_ERROR("Tx Power can not find channel %d ", channel);
1084                 return -1;
1085         }
1086
1087         ch_i1 = priv->calib_info->band_info[s].ch1.ch_num;
1088         ch_i2 = priv->calib_info->band_info[s].ch2.ch_num;
1089         chan_info->ch_num = (u8) channel;
1090
1091         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
1092                           channel, s, ch_i1, ch_i2);
1093
1094         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
1095                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
1096                         m1 = &(priv->calib_info->band_info[s].ch1.
1097                                measurements[c][m]);
1098                         m2 = &(priv->calib_info->band_info[s].ch2.
1099                                measurements[c][m]);
1100                         omeas = &(chan_info->measurements[c][m]);
1101
1102                         omeas->actual_pow =
1103                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1104                                                            m1->actual_pow,
1105                                                            ch_i2,
1106                                                            m2->actual_pow);
1107                         omeas->gain_idx =
1108                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1109                                                            m1->gain_idx, ch_i2,
1110                                                            m2->gain_idx);
1111                         omeas->temperature =
1112                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1113                                                            m1->temperature,
1114                                                            ch_i2,
1115                                                            m2->temperature);
1116                         omeas->pa_det =
1117                             (s8) iwl4965_interpolate_value(channel, ch_i1,
1118                                                            m1->pa_det, ch_i2,
1119                                                            m2->pa_det);
1120
1121                         IWL_DEBUG_TXPOWER
1122                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
1123                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
1124                         IWL_DEBUG_TXPOWER
1125                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
1126                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
1127                         IWL_DEBUG_TXPOWER
1128                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
1129                              m1->pa_det, m2->pa_det, omeas->pa_det);
1130                         IWL_DEBUG_TXPOWER
1131                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
1132                              m1->temperature, m2->temperature,
1133                              omeas->temperature);
1134                 }
1135         }
1136
1137         return 0;
1138 }
1139
1140 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
1141  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
1142 static s32 back_off_table[] = {
1143         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
1144         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
1145         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
1146         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
1147         10                      /* CCK */
1148 };
1149
1150 /* Thermal compensation values for txpower for various frequency ranges ...
1151  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
1152 static struct iwl4965_txpower_comp_entry {
1153         s32 degrees_per_05db_a;
1154         s32 degrees_per_05db_a_denom;
1155 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
1156         {9, 2},                 /* group 0 5.2, ch  34-43 */
1157         {4, 1},                 /* group 1 5.2, ch  44-70 */
1158         {4, 1},                 /* group 2 5.2, ch  71-124 */
1159         {4, 1},                 /* group 3 5.2, ch 125-200 */
1160         {3, 1}                  /* group 4 2.4, ch   all */
1161 };
1162
1163 static s32 get_min_power_index(s32 rate_power_index, u32 band)
1164 {
1165         if (!band) {
1166                 if ((rate_power_index & 7) <= 4)
1167                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
1168         }
1169         return MIN_TX_GAIN_INDEX;
1170 }
1171
1172 struct gain_entry {
1173         u8 dsp;
1174         u8 radio;
1175 };
1176
1177 static const struct gain_entry gain_table[2][108] = {
1178         /* 5.2GHz power gain index table */
1179         {
1180          {123, 0x3F},           /* highest txpower */
1181          {117, 0x3F},
1182          {110, 0x3F},
1183          {104, 0x3F},
1184          {98, 0x3F},
1185          {110, 0x3E},
1186          {104, 0x3E},
1187          {98, 0x3E},
1188          {110, 0x3D},
1189          {104, 0x3D},
1190          {98, 0x3D},
1191          {110, 0x3C},
1192          {104, 0x3C},
1193          {98, 0x3C},
1194          {110, 0x3B},
1195          {104, 0x3B},
1196          {98, 0x3B},
1197          {110, 0x3A},
1198          {104, 0x3A},
1199          {98, 0x3A},
1200          {110, 0x39},
1201          {104, 0x39},
1202          {98, 0x39},
1203          {110, 0x38},
1204          {104, 0x38},
1205          {98, 0x38},
1206          {110, 0x37},
1207          {104, 0x37},
1208          {98, 0x37},
1209          {110, 0x36},
1210          {104, 0x36},
1211          {98, 0x36},
1212          {110, 0x35},
1213          {104, 0x35},
1214          {98, 0x35},
1215          {110, 0x34},
1216          {104, 0x34},
1217          {98, 0x34},
1218          {110, 0x33},
1219          {104, 0x33},
1220          {98, 0x33},
1221          {110, 0x32},
1222          {104, 0x32},
1223          {98, 0x32},
1224          {110, 0x31},
1225          {104, 0x31},
1226          {98, 0x31},
1227          {110, 0x30},
1228          {104, 0x30},
1229          {98, 0x30},
1230          {110, 0x25},
1231          {104, 0x25},
1232          {98, 0x25},
1233          {110, 0x24},
1234          {104, 0x24},
1235          {98, 0x24},
1236          {110, 0x23},
1237          {104, 0x23},
1238          {98, 0x23},
1239          {110, 0x22},
1240          {104, 0x18},
1241          {98, 0x18},
1242          {110, 0x17},
1243          {104, 0x17},
1244          {98, 0x17},
1245          {110, 0x16},
1246          {104, 0x16},
1247          {98, 0x16},
1248          {110, 0x15},
1249          {104, 0x15},
1250          {98, 0x15},
1251          {110, 0x14},
1252          {104, 0x14},
1253          {98, 0x14},
1254          {110, 0x13},
1255          {104, 0x13},
1256          {98, 0x13},
1257          {110, 0x12},
1258          {104, 0x08},
1259          {98, 0x08},
1260          {110, 0x07},
1261          {104, 0x07},
1262          {98, 0x07},
1263          {110, 0x06},
1264          {104, 0x06},
1265          {98, 0x06},
1266          {110, 0x05},
1267          {104, 0x05},
1268          {98, 0x05},
1269          {110, 0x04},
1270          {104, 0x04},
1271          {98, 0x04},
1272          {110, 0x03},
1273          {104, 0x03},
1274          {98, 0x03},
1275          {110, 0x02},
1276          {104, 0x02},
1277          {98, 0x02},
1278          {110, 0x01},
1279          {104, 0x01},
1280          {98, 0x01},
1281          {110, 0x00},
1282          {104, 0x00},
1283          {98, 0x00},
1284          {93, 0x00},
1285          {88, 0x00},
1286          {83, 0x00},
1287          {78, 0x00},
1288          },
1289         /* 2.4GHz power gain index table */
1290         {
1291          {110, 0x3f},           /* highest txpower */
1292          {104, 0x3f},
1293          {98, 0x3f},
1294          {110, 0x3e},
1295          {104, 0x3e},
1296          {98, 0x3e},
1297          {110, 0x3d},
1298          {104, 0x3d},
1299          {98, 0x3d},
1300          {110, 0x3c},
1301          {104, 0x3c},
1302          {98, 0x3c},
1303          {110, 0x3b},
1304          {104, 0x3b},
1305          {98, 0x3b},
1306          {110, 0x3a},
1307          {104, 0x3a},
1308          {98, 0x3a},
1309          {110, 0x39},
1310          {104, 0x39},
1311          {98, 0x39},
1312          {110, 0x38},
1313          {104, 0x38},
1314          {98, 0x38},
1315          {110, 0x37},
1316          {104, 0x37},
1317          {98, 0x37},
1318          {110, 0x36},
1319          {104, 0x36},
1320          {98, 0x36},
1321          {110, 0x35},
1322          {104, 0x35},
1323          {98, 0x35},
1324          {110, 0x34},
1325          {104, 0x34},
1326          {98, 0x34},
1327          {110, 0x33},
1328          {104, 0x33},
1329          {98, 0x33},
1330          {110, 0x32},
1331          {104, 0x32},
1332          {98, 0x32},
1333          {110, 0x31},
1334          {104, 0x31},
1335          {98, 0x31},
1336          {110, 0x30},
1337          {104, 0x30},
1338          {98, 0x30},
1339          {110, 0x6},
1340          {104, 0x6},
1341          {98, 0x6},
1342          {110, 0x5},
1343          {104, 0x5},
1344          {98, 0x5},
1345          {110, 0x4},
1346          {104, 0x4},
1347          {98, 0x4},
1348          {110, 0x3},
1349          {104, 0x3},
1350          {98, 0x3},
1351          {110, 0x2},
1352          {104, 0x2},
1353          {98, 0x2},
1354          {110, 0x1},
1355          {104, 0x1},
1356          {98, 0x1},
1357          {110, 0x0},
1358          {104, 0x0},
1359          {98, 0x0},
1360          {97, 0},
1361          {96, 0},
1362          {95, 0},
1363          {94, 0},
1364          {93, 0},
1365          {92, 0},
1366          {91, 0},
1367          {90, 0},
1368          {89, 0},
1369          {88, 0},
1370          {87, 0},
1371          {86, 0},
1372          {85, 0},
1373          {84, 0},
1374          {83, 0},
1375          {82, 0},
1376          {81, 0},
1377          {80, 0},
1378          {79, 0},
1379          {78, 0},
1380          {77, 0},
1381          {76, 0},
1382          {75, 0},
1383          {74, 0},
1384          {73, 0},
1385          {72, 0},
1386          {71, 0},
1387          {70, 0},
1388          {69, 0},
1389          {68, 0},
1390          {67, 0},
1391          {66, 0},
1392          {65, 0},
1393          {64, 0},
1394          {63, 0},
1395          {62, 0},
1396          {61, 0},
1397          {60, 0},
1398          {59, 0},
1399          }
1400 };
1401
1402 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
1403                                     u8 is_fat, u8 ctrl_chan_high,
1404                                     struct iwl4965_tx_power_db *tx_power_tbl)
1405 {
1406         u8 saturation_power;
1407         s32 target_power;
1408         s32 user_target_power;
1409         s32 power_limit;
1410         s32 current_temp;
1411         s32 reg_limit;
1412         s32 current_regulatory;
1413         s32 txatten_grp = CALIB_CH_GROUP_MAX;
1414         int i;
1415         int c;
1416         const struct iwl_channel_info *ch_info = NULL;
1417         struct iwl_eeprom_calib_ch_info ch_eeprom_info;
1418         const struct iwl_eeprom_calib_measure *measurement;
1419         s16 voltage;
1420         s32 init_voltage;
1421         s32 voltage_compensation;
1422         s32 degrees_per_05db_num;
1423         s32 degrees_per_05db_denom;
1424         s32 factory_temp;
1425         s32 temperature_comp[2];
1426         s32 factory_gain_index[2];
1427         s32 factory_actual_pwr[2];
1428         s32 power_index;
1429
1430         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
1431          *   are used for indexing into txpower table) */
1432         user_target_power = 2 * priv->tx_power_user_lmt;
1433
1434         /* Get current (RXON) channel, band, width */
1435         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
1436                           is_fat);
1437
1438         ch_info = iwl_get_channel_info(priv, priv->band, channel);
1439
1440         if (!is_channel_valid(ch_info))
1441                 return -EINVAL;
1442
1443         /* get txatten group, used to select 1) thermal txpower adjustment
1444          *   and 2) mimo txpower balance between Tx chains. */
1445         txatten_grp = iwl4965_get_tx_atten_grp(channel);
1446         if (txatten_grp < 0)
1447                 return -EINVAL;
1448
1449         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
1450                           channel, txatten_grp);
1451
1452         if (is_fat) {
1453                 if (ctrl_chan_high)
1454                         channel -= 2;
1455                 else
1456                         channel += 2;
1457         }
1458
1459         /* hardware txpower limits ...
1460          * saturation (clipping distortion) txpowers are in half-dBm */
1461         if (band)
1462                 saturation_power = priv->calib_info->saturation_power24;
1463         else
1464                 saturation_power = priv->calib_info->saturation_power52;
1465
1466         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
1467             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
1468                 if (band)
1469                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
1470                 else
1471                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
1472         }
1473
1474         /* regulatory txpower limits ... reg_limit values are in half-dBm,
1475          *   max_power_avg values are in dBm, convert * 2 */
1476         if (is_fat)
1477                 reg_limit = ch_info->fat_max_power_avg * 2;
1478         else
1479                 reg_limit = ch_info->max_power_avg * 2;
1480
1481         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
1482             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
1483                 if (band)
1484                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
1485                 else
1486                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
1487         }
1488
1489         /* Interpolate txpower calibration values for this channel,
1490          *   based on factory calibration tests on spaced channels. */
1491         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
1492
1493         /* calculate tx gain adjustment based on power supply voltage */
1494         voltage = priv->calib_info->voltage;
1495         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
1496         voltage_compensation =
1497             iwl4965_get_voltage_compensation(voltage, init_voltage);
1498
1499         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
1500                           init_voltage,
1501                           voltage, voltage_compensation);
1502
1503         /* get current temperature (Celsius) */
1504         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
1505         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
1506         current_temp = KELVIN_TO_CELSIUS(current_temp);
1507
1508         /* select thermal txpower adjustment params, based on channel group
1509          *   (same frequency group used for mimo txatten adjustment) */
1510         degrees_per_05db_num =
1511             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
1512         degrees_per_05db_denom =
1513             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
1514
1515         /* get per-chain txpower values from factory measurements */
1516         for (c = 0; c < 2; c++) {
1517                 measurement = &ch_eeprom_info.measurements[c][1];
1518
1519                 /* txgain adjustment (in half-dB steps) based on difference
1520                  *   between factory and current temperature */
1521                 factory_temp = measurement->temperature;
1522                 iwl4965_math_div_round((current_temp - factory_temp) *
1523                                        degrees_per_05db_denom,
1524                                        degrees_per_05db_num,
1525                                        &temperature_comp[c]);
1526
1527                 factory_gain_index[c] = measurement->gain_idx;
1528                 factory_actual_pwr[c] = measurement->actual_pow;
1529
1530                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
1531                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
1532                                   "curr tmp %d, comp %d steps\n",
1533                                   factory_temp, current_temp,
1534                                   temperature_comp[c]);
1535
1536                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
1537                                   factory_gain_index[c],
1538                                   factory_actual_pwr[c]);
1539         }
1540
1541         /* for each of 33 bit-rates (including 1 for CCK) */
1542         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
1543                 u8 is_mimo_rate;
1544                 union iwl4965_tx_power_dual_stream tx_power;
1545
1546                 /* for mimo, reduce each chain's txpower by half
1547                  * (3dB, 6 steps), so total output power is regulatory
1548                  * compliant. */
1549                 if (i & 0x8) {
1550                         current_regulatory = reg_limit -
1551                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
1552                         is_mimo_rate = 1;
1553                 } else {
1554                         current_regulatory = reg_limit;
1555                         is_mimo_rate = 0;
1556                 }
1557
1558                 /* find txpower limit, either hardware or regulatory */
1559                 power_limit = saturation_power - back_off_table[i];
1560                 if (power_limit > current_regulatory)
1561                         power_limit = current_regulatory;
1562
1563                 /* reduce user's txpower request if necessary
1564                  * for this rate on this channel */
1565                 target_power = user_target_power;
1566                 if (target_power > power_limit)
1567                         target_power = power_limit;
1568
1569                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
1570                                   i, saturation_power - back_off_table[i],
1571                                   current_regulatory, user_target_power,
1572                                   target_power);
1573
1574                 /* for each of 2 Tx chains (radio transmitters) */
1575                 for (c = 0; c < 2; c++) {
1576                         s32 atten_value;
1577
1578                         if (is_mimo_rate)
1579                                 atten_value =
1580                                     (s32)le32_to_cpu(priv->card_alive_init.
1581                                     tx_atten[txatten_grp][c]);
1582                         else
1583                                 atten_value = 0;
1584
1585                         /* calculate index; higher index means lower txpower */
1586                         power_index = (u8) (factory_gain_index[c] -
1587                                             (target_power -
1588                                              factory_actual_pwr[c]) -
1589                                             temperature_comp[c] -
1590                                             voltage_compensation +
1591                                             atten_value);
1592
1593 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
1594                                                 power_index); */
1595
1596                         if (power_index < get_min_power_index(i, band))
1597                                 power_index = get_min_power_index(i, band);
1598
1599                         /* adjust 5 GHz index to support negative indexes */
1600                         if (!band)
1601                                 power_index += 9;
1602
1603                         /* CCK, rate 32, reduce txpower for CCK */
1604                         if (i == POWER_TABLE_CCK_ENTRY)
1605                                 power_index +=
1606                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
1607
1608                         /* stay within the table! */
1609                         if (power_index > 107) {
1610                                 IWL_WARNING("txpower index %d > 107\n",
1611                                             power_index);
1612                                 power_index = 107;
1613                         }
1614                         if (power_index < 0) {
1615                                 IWL_WARNING("txpower index %d < 0\n",
1616                                             power_index);
1617                                 power_index = 0;
1618                         }
1619
1620                         /* fill txpower command for this rate/chain */
1621                         tx_power.s.radio_tx_gain[c] =
1622                                 gain_table[band][power_index].radio;
1623                         tx_power.s.dsp_predis_atten[c] =
1624                                 gain_table[band][power_index].dsp;
1625
1626                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
1627                                           "gain 0x%02x dsp %d\n",
1628                                           c, atten_value, power_index,
1629                                         tx_power.s.radio_tx_gain[c],
1630                                         tx_power.s.dsp_predis_atten[c]);
1631                 }/* for each chain */
1632
1633                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
1634
1635         }/* for each rate */
1636
1637         return 0;
1638 }
1639
1640 /**
1641  * iwl4965_send_tx_power - Configure the TXPOWER level user limit
1642  *
1643  * Uses the active RXON for channel, band, and characteristics (fat, high)
1644  * The power limit is taken from priv->tx_power_user_lmt.
1645  */
1646 static int iwl4965_send_tx_power(struct iwl_priv *priv)
1647 {
1648         struct iwl4965_txpowertable_cmd cmd = { 0 };
1649         int ret;
1650         u8 band = 0;
1651         u8 is_fat = 0;
1652         u8 ctrl_chan_high = 0;
1653
1654         if (test_bit(STATUS_SCANNING, &priv->status)) {
1655                 /* If this gets hit a lot, switch it to a BUG() and catch
1656                  * the stack trace to find out who is calling this during
1657                  * a scan. */
1658                 IWL_WARNING("TX Power requested while scanning!\n");
1659                 return -EAGAIN;
1660         }
1661
1662         band = priv->band == IEEE80211_BAND_2GHZ;
1663
1664         is_fat =  is_fat_channel(priv->active_rxon.flags);
1665
1666         if (is_fat &&
1667             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1668                 ctrl_chan_high = 1;
1669
1670         cmd.band = band;
1671         cmd.channel = priv->active_rxon.channel;
1672
1673         ret = iwl4965_fill_txpower_tbl(priv, band,
1674                                 le16_to_cpu(priv->active_rxon.channel),
1675                                 is_fat, ctrl_chan_high, &cmd.tx_power);
1676         if (ret)
1677                 goto out;
1678
1679         ret = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
1680
1681 out:
1682         return ret;
1683 }
1684
1685 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
1686 {
1687         int ret = 0;
1688         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1689         const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1690         const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1691
1692         if ((rxon1->flags == rxon2->flags) &&
1693             (rxon1->filter_flags == rxon2->filter_flags) &&
1694             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1695             (rxon1->ofdm_ht_single_stream_basic_rates ==
1696              rxon2->ofdm_ht_single_stream_basic_rates) &&
1697             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1698              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1699             (rxon1->rx_chain == rxon2->rx_chain) &&
1700             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1701                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1702                 return 0;
1703         }
1704
1705         rxon_assoc.flags = priv->staging_rxon.flags;
1706         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1707         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1708         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1709         rxon_assoc.reserved = 0;
1710         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1711             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1712         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1713             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1714         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1715
1716         ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
1717                                      sizeof(rxon_assoc), &rxon_assoc, NULL);
1718         if (ret)
1719                 return ret;
1720
1721         return ret;
1722 }
1723
1724
1725 int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
1726 {
1727         int rc;
1728         u8 band = 0;
1729         u8 is_fat = 0;
1730         u8 ctrl_chan_high = 0;
1731         struct iwl4965_channel_switch_cmd cmd = { 0 };
1732         const struct iwl_channel_info *ch_info;
1733
1734         band = priv->band == IEEE80211_BAND_2GHZ;
1735
1736         ch_info = iwl_get_channel_info(priv, priv->band, channel);
1737
1738         is_fat = is_fat_channel(priv->staging_rxon.flags);
1739
1740         if (is_fat &&
1741             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1742                 ctrl_chan_high = 1;
1743
1744         cmd.band = band;
1745         cmd.expect_beacon = 0;
1746         cmd.channel = cpu_to_le16(channel);
1747         cmd.rxon_flags = priv->active_rxon.flags;
1748         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
1749         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
1750         if (ch_info)
1751                 cmd.expect_beacon = is_channel_radar(ch_info);
1752         else
1753                 cmd.expect_beacon = 1;
1754
1755         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
1756                                       ctrl_chan_high, &cmd.tx_power);
1757         if (rc) {
1758                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
1759                 return rc;
1760         }
1761
1762         rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
1763         return rc;
1764 }
1765
1766 static int iwl4965_shared_mem_rx_idx(struct iwl_priv *priv)
1767 {
1768         struct iwl4965_shared *s = priv->shared_virt;
1769         return le32_to_cpu(s->rb_closed) & 0xFFF;
1770 }
1771
1772 int iwl4965_hw_get_temperature(struct iwl_priv *priv)
1773 {
1774         return priv->temperature;
1775 }
1776
1777 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl_priv *priv,
1778                           struct iwl_frame *frame, u8 rate)
1779 {
1780         struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
1781         unsigned int frame_size;
1782
1783         tx_beacon_cmd = &frame->u.beacon;
1784         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
1785
1786         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
1787         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1788
1789         frame_size = iwl4965_fill_beacon_frame(priv,
1790                                 tx_beacon_cmd->frame,
1791                                 iwl_bcast_addr,
1792                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
1793
1794         BUG_ON(frame_size > MAX_MPDU_SIZE);
1795         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
1796
1797         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
1798                 tx_beacon_cmd->tx.rate_n_flags =
1799                         iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
1800         else
1801                 tx_beacon_cmd->tx.rate_n_flags =
1802                         iwl4965_hw_set_rate_n_flags(rate, 0);
1803
1804         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
1805                                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
1806         return (sizeof(*tx_beacon_cmd) + frame_size);
1807 }
1808
1809 static int iwl4965_alloc_shared_mem(struct iwl_priv *priv)
1810 {
1811         priv->shared_virt = pci_alloc_consistent(priv->pci_dev,
1812                                         sizeof(struct iwl4965_shared),
1813                                         &priv->shared_phys);
1814         if (!priv->shared_virt)
1815                 return -ENOMEM;
1816
1817         memset(priv->shared_virt, 0, sizeof(struct iwl4965_shared));
1818
1819         priv->rb_closed_offset = offsetof(struct iwl4965_shared, rb_closed);
1820
1821         return 0;
1822 }
1823
1824 static void iwl4965_free_shared_mem(struct iwl_priv *priv)
1825 {
1826         if (priv->shared_virt)
1827                 pci_free_consistent(priv->pci_dev,
1828                                     sizeof(struct iwl4965_shared),
1829                                     priv->shared_virt,
1830                                     priv->shared_phys);
1831 }
1832
1833 /**
1834  * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
1835  */
1836 static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
1837                                             struct iwl_tx_queue *txq,
1838                                             u16 byte_cnt)
1839 {
1840         int len;
1841         int txq_id = txq->q.id;
1842         struct iwl4965_shared *shared_data = priv->shared_virt;
1843
1844         len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
1845
1846         /* Set up byte count within first 256 entries */
1847         IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
1848                        tfd_offset[txq->q.write_ptr], byte_cnt, len);
1849
1850         /* If within first 64 entries, duplicate at end */
1851         if (txq->q.write_ptr < IWL49_MAX_WIN_SIZE)
1852                 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
1853                         tfd_offset[IWL49_QUEUE_SIZE + txq->q.write_ptr],
1854                         byte_cnt, len);
1855 }
1856
1857 /**
1858  * sign_extend - Sign extend a value using specified bit as sign-bit
1859  *
1860  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
1861  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
1862  *
1863  * @param oper value to sign extend
1864  * @param index 0 based bit index (0<=index<32) to sign bit
1865  */
1866 static s32 sign_extend(u32 oper, int index)
1867 {
1868         u8 shift = 31 - index;
1869
1870         return (s32)(oper << shift) >> shift;
1871 }
1872
1873 /**
1874  * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
1875  * @statistics: Provides the temperature reading from the uCode
1876  *
1877  * A return of <0 indicates bogus data in the statistics
1878  */
1879 int iwl4965_get_temperature(const struct iwl_priv *priv)
1880 {
1881         s32 temperature;
1882         s32 vt;
1883         s32 R1, R2, R3;
1884         u32 R4;
1885
1886         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
1887                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
1888                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
1889                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
1890                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
1891                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
1892                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
1893         } else {
1894                 IWL_DEBUG_TEMP("Running temperature calibration\n");
1895                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
1896                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
1897                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
1898                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
1899         }
1900
1901         /*
1902          * Temperature is only 23 bits, so sign extend out to 32.
1903          *
1904          * NOTE If we haven't received a statistics notification yet
1905          * with an updated temperature, use R4 provided to us in the
1906          * "initialize" ALIVE response.
1907          */
1908         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
1909                 vt = sign_extend(R4, 23);
1910         else
1911                 vt = sign_extend(
1912                         le32_to_cpu(priv->statistics.general.temperature), 23);
1913
1914         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
1915                        R1, R2, R3, vt);
1916
1917         if (R3 == R1) {
1918                 IWL_ERROR("Calibration conflict R1 == R3\n");
1919                 return -1;
1920         }
1921
1922         /* Calculate temperature in degrees Kelvin, adjust by 97%.
1923          * Add offset to center the adjustment around 0 degrees Centigrade. */
1924         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
1925         temperature /= (R3 - R1);
1926         temperature = (temperature * 97) / 100 +
1927             TEMPERATURE_CALIB_KELVIN_OFFSET;
1928
1929         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
1930             KELVIN_TO_CELSIUS(temperature));
1931
1932         return temperature;
1933 }
1934
1935 /* Adjust Txpower only if temperature variance is greater than threshold. */
1936 #define IWL_TEMPERATURE_THRESHOLD   3
1937
1938 /**
1939  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
1940  *
1941  * If the temperature changed has changed sufficiently, then a recalibration
1942  * is needed.
1943  *
1944  * Assumes caller will replace priv->last_temperature once calibration
1945  * executed.
1946  */
1947 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
1948 {
1949         int temp_diff;
1950
1951         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
1952                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
1953                 return 0;
1954         }
1955
1956         temp_diff = priv->temperature - priv->last_temperature;
1957
1958         /* get absolute value */
1959         if (temp_diff < 0) {
1960                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
1961                 temp_diff = -temp_diff;
1962         } else if (temp_diff == 0)
1963                 IWL_DEBUG_POWER("Same temp, \n");
1964         else
1965                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
1966
1967         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
1968                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
1969                 return 0;
1970         }
1971
1972         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
1973
1974         return 1;
1975 }
1976
1977 /* Calculate noise level, based on measurements during network silence just
1978  *   before arriving beacon.  This measurement can be done only if we know
1979  *   exactly when to expect beacons, therefore only when we're associated. */
1980 static void iwl4965_rx_calc_noise(struct iwl_priv *priv)
1981 {
1982         struct statistics_rx_non_phy *rx_info
1983                                 = &(priv->statistics.rx.general);
1984         int num_active_rx = 0;
1985         int total_silence = 0;
1986         int bcn_silence_a =
1987                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
1988         int bcn_silence_b =
1989                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
1990         int bcn_silence_c =
1991                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
1992
1993         if (bcn_silence_a) {
1994                 total_silence += bcn_silence_a;
1995                 num_active_rx++;
1996         }
1997         if (bcn_silence_b) {
1998                 total_silence += bcn_silence_b;
1999                 num_active_rx++;
2000         }
2001         if (bcn_silence_c) {
2002                 total_silence += bcn_silence_c;
2003                 num_active_rx++;
2004         }
2005
2006         /* Average among active antennas */
2007         if (num_active_rx)
2008                 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
2009         else
2010                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
2011
2012         IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
2013                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
2014                         priv->last_rx_noise);
2015 }
2016
2017 void iwl4965_hw_rx_statistics(struct iwl_priv *priv,
2018                               struct iwl_rx_mem_buffer *rxb)
2019 {
2020         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2021         int change;
2022         s32 temp;
2023
2024         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
2025                      (int)sizeof(priv->statistics), pkt->len);
2026
2027         change = ((priv->statistics.general.temperature !=
2028                    pkt->u.stats.general.temperature) ||
2029                   ((priv->statistics.flag &
2030                     STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
2031                    (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
2032
2033         memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
2034
2035         set_bit(STATUS_STATISTICS, &priv->status);
2036
2037         /* Reschedule the statistics timer to occur in
2038          * REG_RECALIB_PERIOD seconds to ensure we get a
2039          * thermal update even if the uCode doesn't give
2040          * us one */
2041         mod_timer(&priv->statistics_periodic, jiffies +
2042                   msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
2043
2044         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
2045             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
2046                 iwl4965_rx_calc_noise(priv);
2047                 queue_work(priv->workqueue, &priv->run_time_calib_work);
2048         }
2049
2050         iwl_leds_background(priv);
2051
2052         /* If the hardware hasn't reported a change in
2053          * temperature then don't bother computing a
2054          * calibrated temperature value */
2055         if (!change)
2056                 return;
2057
2058         temp = iwl4965_get_temperature(priv);
2059         if (temp < 0)
2060                 return;
2061
2062         if (priv->temperature != temp) {
2063                 if (priv->temperature)
2064                         IWL_DEBUG_TEMP("Temperature changed "
2065                                        "from %dC to %dC\n",
2066                                        KELVIN_TO_CELSIUS(priv->temperature),
2067                                        KELVIN_TO_CELSIUS(temp));
2068                 else
2069                         IWL_DEBUG_TEMP("Temperature "
2070                                        "initialized to %dC\n",
2071                                        KELVIN_TO_CELSIUS(temp));
2072         }
2073
2074         priv->temperature = temp;
2075         set_bit(STATUS_TEMPERATURE, &priv->status);
2076
2077         if (!priv->disable_tx_power_cal &&
2078              unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
2079              iwl4965_is_temp_calib_needed(priv))
2080                 queue_work(priv->workqueue, &priv->txpower_work);
2081 }
2082
2083 static void iwl4965_add_radiotap(struct iwl_priv *priv,
2084                                  struct sk_buff *skb,
2085                                  struct iwl4965_rx_phy_res *rx_start,
2086                                  struct ieee80211_rx_status *stats,
2087                                  u32 ampdu_status)
2088 {
2089         s8 signal = stats->signal;
2090         s8 noise = 0;
2091         int rate = stats->rate_idx;
2092         u64 tsf = stats->mactime;
2093         __le16 antenna;
2094         __le16 phy_flags_hw = rx_start->phy_flags;
2095         struct iwl4965_rt_rx_hdr {
2096                 struct ieee80211_radiotap_header rt_hdr;
2097                 __le64 rt_tsf;          /* TSF */
2098                 u8 rt_flags;            /* radiotap packet flags */
2099                 u8 rt_rate;             /* rate in 500kb/s */
2100                 __le16 rt_channelMHz;   /* channel in MHz */
2101                 __le16 rt_chbitmask;    /* channel bitfield */
2102                 s8 rt_dbmsignal;        /* signal in dBm, kluged to signed */
2103                 s8 rt_dbmnoise;
2104                 u8 rt_antenna;          /* antenna number */
2105         } __attribute__ ((packed)) *iwl4965_rt;
2106
2107         /* TODO: We won't have enough headroom for HT frames. Fix it later. */
2108         if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
2109                 if (net_ratelimit())
2110                         printk(KERN_ERR "not enough headroom [%d] for "
2111                                "radiotap head [%zd]\n",
2112                                skb_headroom(skb), sizeof(*iwl4965_rt));
2113                 return;
2114         }
2115
2116         /* put radiotap header in front of 802.11 header and data */
2117         iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
2118
2119         /* initialise radiotap header */
2120         iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
2121         iwl4965_rt->rt_hdr.it_pad = 0;
2122
2123         /* total header + data */
2124         put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
2125                       &iwl4965_rt->rt_hdr.it_len);
2126
2127         /* Indicate all the fields we add to the radiotap header */
2128         put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
2129                                   (1 << IEEE80211_RADIOTAP_FLAGS) |
2130                                   (1 << IEEE80211_RADIOTAP_RATE) |
2131                                   (1 << IEEE80211_RADIOTAP_CHANNEL) |
2132                                   (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
2133                                   (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
2134                                   (1 << IEEE80211_RADIOTAP_ANTENNA)),
2135                       &iwl4965_rt->rt_hdr.it_present);
2136
2137         /* Zero the flags, we'll add to them as we go */
2138         iwl4965_rt->rt_flags = 0;
2139
2140         put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
2141
2142         iwl4965_rt->rt_dbmsignal = signal;
2143         iwl4965_rt->rt_dbmnoise = noise;
2144
2145         /* Convert the channel frequency and set the flags */
2146         put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
2147         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
2148                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
2149                                           IEEE80211_CHAN_5GHZ),
2150                               &iwl4965_rt->rt_chbitmask);
2151         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
2152                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
2153                                           IEEE80211_CHAN_2GHZ),
2154                               &iwl4965_rt->rt_chbitmask);
2155         else    /* 802.11g */
2156                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
2157                                           IEEE80211_CHAN_2GHZ),
2158                               &iwl4965_rt->rt_chbitmask);
2159
2160         if (rate == -1)
2161                 iwl4965_rt->rt_rate = 0;
2162         else
2163                 iwl4965_rt->rt_rate = iwl_rates[rate].ieee;
2164
2165         /*
2166          * "antenna number"
2167          *
2168          * It seems that the antenna field in the phy flags value
2169          * is actually a bitfield. This is undefined by radiotap,
2170          * it wants an actual antenna number but I always get "7"
2171          * for most legacy frames I receive indicating that the
2172          * same frame was received on all three RX chains.
2173          *
2174          * I think this field should be removed in favour of a
2175          * new 802.11n radiotap field "RX chains" that is defined
2176          * as a bitmask.
2177          */
2178         antenna = phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK;
2179         iwl4965_rt->rt_antenna = le16_to_cpu(antenna) >> 4;
2180
2181         /* set the preamble flag if appropriate */
2182         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
2183                 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
2184
2185         stats->flag |= RX_FLAG_RADIOTAP;
2186 }
2187
2188 static void iwl_update_rx_stats(struct iwl_priv *priv, u16 fc, u16 len)
2189 {
2190         /* 0 - mgmt, 1 - cnt, 2 - data */
2191         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
2192         priv->rx_stats[idx].cnt++;
2193         priv->rx_stats[idx].bytes += len;
2194 }
2195
2196 /*
2197  * returns non-zero if packet should be dropped
2198  */
2199 static int iwl4965_set_decrypted_flag(struct iwl_priv *priv,
2200                                       struct ieee80211_hdr *hdr,
2201                                       u32 decrypt_res,
2202                                       struct ieee80211_rx_status *stats)
2203 {
2204         u16 fc = le16_to_cpu(hdr->frame_control);
2205
2206         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2207                 return 0;
2208
2209         if (!(fc & IEEE80211_FCTL_PROTECTED))
2210                 return 0;
2211
2212         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2213         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2214         case RX_RES_STATUS_SEC_TYPE_TKIP:
2215                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2216                  * Decryption will be done in SW. */
2217                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2218                     RX_RES_STATUS_BAD_KEY_TTAK)
2219                         break;
2220
2221         case RX_RES_STATUS_SEC_TYPE_WEP:
2222                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2223                     RX_RES_STATUS_BAD_ICV_MIC) {
2224                         /* bad ICV, the packet is destroyed since the
2225                          * decryption is inplace, drop it */
2226                         IWL_DEBUG_RX("Packet destroyed\n");
2227                         return -1;
2228                 }
2229         case RX_RES_STATUS_SEC_TYPE_CCMP:
2230                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2231                     RX_RES_STATUS_DECRYPT_OK) {
2232                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2233                         stats->flag |= RX_FLAG_DECRYPTED;
2234                 }
2235                 break;
2236
2237         default:
2238                 break;
2239         }
2240         return 0;
2241 }
2242
2243 static u32 iwl4965_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
2244 {
2245         u32 decrypt_out = 0;
2246
2247         if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
2248                                         RX_RES_STATUS_STATION_FOUND)
2249                 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
2250                                 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
2251
2252         decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
2253
2254         /* packet was not encrypted */
2255         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
2256                                         RX_RES_STATUS_SEC_TYPE_NONE)
2257                 return decrypt_out;
2258
2259         /* packet was encrypted with unknown alg */
2260         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
2261                                         RX_RES_STATUS_SEC_TYPE_ERR)
2262                 return decrypt_out;
2263
2264         /* decryption was not done in HW */
2265         if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
2266                                         RX_MPDU_RES_STATUS_DEC_DONE_MSK)
2267                 return decrypt_out;
2268
2269         switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
2270
2271         case RX_RES_STATUS_SEC_TYPE_CCMP:
2272                 /* alg is CCM: check MIC only */
2273                 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
2274                         /* Bad MIC */
2275                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
2276                 else
2277                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
2278
2279                 break;
2280
2281         case RX_RES_STATUS_SEC_TYPE_TKIP:
2282                 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
2283                         /* Bad TTAK */
2284                         decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
2285                         break;
2286                 }
2287                 /* fall through if TTAK OK */
2288         default:
2289                 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
2290                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
2291                 else
2292                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
2293                 break;
2294         };
2295
2296         IWL_DEBUG_RX("decrypt_in:0x%x  decrypt_out = 0x%x\n",
2297                                         decrypt_in, decrypt_out);
2298
2299         return decrypt_out;
2300 }
2301
2302 static void iwl4965_handle_data_packet(struct iwl_priv *priv, int is_data,
2303                                        int include_phy,
2304                                        struct iwl_rx_mem_buffer *rxb,
2305                                        struct ieee80211_rx_status *stats)
2306 {
2307         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2308         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
2309             (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
2310         struct ieee80211_hdr *hdr;
2311         u16 len;
2312         __le32 *rx_end;
2313         unsigned int skblen;
2314         u32 ampdu_status;
2315         u32 ampdu_status_legacy;
2316
2317         if (!include_phy && priv->last_phy_res[0])
2318                 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
2319
2320         if (!rx_start) {
2321                 IWL_ERROR("MPDU frame without a PHY data\n");
2322                 return;
2323         }
2324         if (include_phy) {
2325                 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
2326                                                rx_start->cfg_phy_cnt);
2327
2328                 len = le16_to_cpu(rx_start->byte_count);
2329
2330                 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
2331                                   sizeof(struct iwl4965_rx_phy_res) +
2332                                   rx_start->cfg_phy_cnt + len);
2333
2334         } else {
2335                 struct iwl4965_rx_mpdu_res_start *amsdu =
2336                     (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
2337
2338                 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
2339                                sizeof(struct iwl4965_rx_mpdu_res_start));
2340                 len =  le16_to_cpu(amsdu->byte_count);
2341                 rx_start->byte_count = amsdu->byte_count;
2342                 rx_end = (__le32 *) (((u8 *) hdr) + len);
2343         }
2344         /* In monitor mode allow 802.11 ACk frames (10 bytes) */
2345         if (len > priv->hw_params.max_pkt_size ||
2346             len < ((priv->iw_mode == IEEE80211_IF_TYPE_MNTR) ? 10 : 16)) {
2347                 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
2348                 return;
2349         }
2350
2351         ampdu_status = le32_to_cpu(*rx_end);
2352         skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
2353
2354         if (!include_phy) {
2355                 /* New status scheme, need to translate */
2356                 ampdu_status_legacy = ampdu_status;
2357                 ampdu_status = iwl4965_translate_rx_status(priv, ampdu_status);
2358         }
2359
2360         /* start from MAC */
2361         skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
2362         skb_put(rxb->skb, len); /* end where data ends */
2363
2364         /* We only process data packets if the interface is open */
2365         if (unlikely(!priv->is_open)) {
2366                 IWL_DEBUG_DROP_LIMIT
2367                     ("Dropping packet while interface is not open.\n");
2368                 return;
2369         }
2370
2371         stats->flag = 0;
2372         hdr = (struct ieee80211_hdr *)rxb->skb->data;
2373
2374         /*  in case of HW accelerated crypto and bad decryption, drop */
2375         if (!priv->hw_params.sw_crypto &&
2376             iwl4965_set_decrypted_flag(priv, hdr, ampdu_status, stats))
2377                 return;
2378
2379         if (priv->add_radiotap)
2380                 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
2381
2382         iwl_update_rx_stats(priv, le16_to_cpu(hdr->frame_control), len);
2383         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
2384         priv->alloc_rxb_skb--;
2385         rxb->skb = NULL;
2386 }
2387
2388 /* Calc max signal level (dBm) among 3 possible receivers */
2389 static int iwl4965_calc_rssi(struct iwl_priv *priv,
2390                              struct iwl4965_rx_phy_res *rx_resp)
2391 {
2392         /* data from PHY/DSP regarding signal strength, etc.,
2393          *   contents are always there, not configurable by host.  */
2394         struct iwl4965_rx_non_cfg_phy *ncphy =
2395             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
2396         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
2397                         >> IWL_AGC_DB_POS;
2398
2399         u32 valid_antennae =
2400             (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
2401                         >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
2402         u8 max_rssi = 0;
2403         u32 i;
2404
2405         /* Find max rssi among 3 possible receivers.
2406          * These values are measured by the digital signal processor (DSP).
2407          * They should stay fairly constant even as the signal strength varies,
2408          *   if the radio's automatic gain control (AGC) is working right.
2409          * AGC value (see below) will provide the "interesting" info. */
2410         for (i = 0; i < 3; i++)
2411                 if (valid_antennae & (1 << i))
2412                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
2413
2414         IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
2415                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
2416                 max_rssi, agc);
2417
2418         /* dBm = max_rssi dB - agc dB - constant.
2419          * Higher AGC (higher radio gain) means lower signal. */
2420         return (max_rssi - agc - IWL_RSSI_OFFSET);
2421 }
2422
2423 static void iwl4965_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
2424 {
2425         unsigned long flags;
2426
2427         spin_lock_irqsave(&priv->sta_lock, flags);
2428         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
2429         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
2430         priv->stations[sta_id].sta.sta.modify_mask = 0;
2431         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
2432         spin_unlock_irqrestore(&priv->sta_lock, flags);
2433
2434         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
2435 }
2436
2437 static void iwl4965_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
2438 {
2439         /* FIXME: need locking over ps_status ??? */
2440         u8 sta_id = iwl_find_station(priv, addr);
2441
2442         if (sta_id != IWL_INVALID_STATION) {
2443                 u8 sta_awake = priv->stations[sta_id].
2444                                 ps_status == STA_PS_STATUS_WAKE;
2445
2446                 if (sta_awake && ps_bit)
2447                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
2448                 else if (!sta_awake && !ps_bit) {
2449                         iwl4965_sta_modify_ps_wake(priv, sta_id);
2450                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
2451                 }
2452         }
2453 }
2454 #ifdef CONFIG_IWLWIFI_DEBUG
2455
2456 /**
2457  * iwl4965_dbg_report_frame - dump frame to syslog during debug sessions
2458  *
2459  * You may hack this function to show different aspects of received frames,
2460  * including selective frame dumps.
2461  * group100 parameter selects whether to show 1 out of 100 good frames.
2462  *
2463  * TODO:  This was originally written for 3945, need to audit for
2464  *        proper operation with 4965.
2465  */
2466 static void iwl4965_dbg_report_frame(struct iwl_priv *priv,
2467                       struct iwl_rx_packet *pkt,
2468                       struct ieee80211_hdr *header, int group100)
2469 {
2470         u32 to_us;
2471         u32 print_summary = 0;
2472         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
2473         u32 hundred = 0;
2474         u32 dataframe = 0;
2475         u16 fc;
2476         u16 seq_ctl;
2477         u16 channel;
2478         u16 phy_flags;
2479         int rate_sym;
2480         u16 length;
2481         u16 status;
2482         u16 bcn_tmr;
2483         u32 tsf_low;
2484         u64 tsf;
2485         u8 rssi;
2486         u8 agc;
2487         u16 sig_avg;
2488         u16 noise_diff;
2489         struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
2490         struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
2491         struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
2492         u8 *data = IWL_RX_DATA(pkt);
2493
2494         if (likely(!(priv->debug_level & IWL_DL_RX)))
2495                 return;
2496
2497         /* MAC header */
2498         fc = le16_to_cpu(header->frame_control);
2499         seq_ctl = le16_to_cpu(header->seq_ctrl);
2500
2501         /* metadata */
2502         channel = le16_to_cpu(rx_hdr->channel);
2503         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
2504         rate_sym = rx_hdr->rate;
2505         length = le16_to_cpu(rx_hdr->len);
2506
2507         /* end-of-frame status and timestamp */
2508         status = le32_to_cpu(rx_end->status);
2509         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
2510         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
2511         tsf = le64_to_cpu(rx_end->timestamp);
2512
2513         /* signal statistics */
2514         rssi = rx_stats->rssi;
2515         agc = rx_stats->agc;
2516         sig_avg = le16_to_cpu(rx_stats->sig_avg);
2517         noise_diff = le16_to_cpu(rx_stats->noise_diff);
2518
2519         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
2520
2521         /* if data frame is to us and all is good,
2522          *   (optionally) print summary for only 1 out of every 100 */
2523         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
2524             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
2525                 dataframe = 1;
2526                 if (!group100)
2527                         print_summary = 1;      /* print each frame */
2528                 else if (priv->framecnt_to_us < 100) {
2529                         priv->framecnt_to_us++;
2530                         print_summary = 0;
2531                 } else {
2532                         priv->framecnt_to_us = 0;
2533                         print_summary = 1;
2534                         hundred = 1;
2535                 }
2536         } else {
2537                 /* print summary for all other frames */
2538                 print_summary = 1;
2539         }
2540
2541         if (print_summary) {
2542                 char *title;
2543                 int rate_idx;
2544                 u32 bitrate;
2545
2546                 if (hundred)
2547                         title = "100Frames";
2548                 else if (fc & IEEE80211_FCTL_RETRY)
2549                         title = "Retry";
2550                 else if (ieee80211_is_assoc_response(fc))
2551                         title = "AscRsp";
2552                 else if (ieee80211_is_reassoc_response(fc))
2553                         title = "RasRsp";
2554                 else if (ieee80211_is_probe_response(fc)) {
2555                         title = "PrbRsp";
2556                         print_dump = 1; /* dump frame contents */
2557                 } else if (ieee80211_is_beacon(fc)) {
2558                         title = "Beacon";
2559                         print_dump = 1; /* dump frame contents */
2560                 } else if (ieee80211_is_atim(fc))
2561                         title = "ATIM";
2562                 else if (ieee80211_is_auth(fc))
2563                         title = "Auth";
2564                 else if (ieee80211_is_deauth(fc))
2565                         title = "DeAuth";
2566                 else if (ieee80211_is_disassoc(fc))
2567                         title = "DisAssoc";
2568                 else
2569                         title = "Frame";
2570
2571                 rate_idx = iwl4965_hwrate_to_plcp_idx(rate_sym);
2572                 if (unlikely(rate_idx == -1))
2573                         bitrate = 0;
2574                 else
2575                         bitrate = iwl_rates[rate_idx].ieee / 2;
2576
2577                 /* print frame summary.
2578                  * MAC addresses show just the last byte (for brevity),
2579                  *    but you can hack it to show more, if you'd like to. */
2580                 if (dataframe)
2581                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
2582                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
2583                                      title, fc, header->addr1[5],
2584                                      length, rssi, channel, bitrate);
2585                 else {
2586                         /* src/dst addresses assume managed mode */
2587                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
2588                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
2589                                      "phy=0x%02x, chnl=%d\n",
2590                                      title, fc, header->addr1[5],
2591                                      header->addr3[5], rssi,
2592                                      tsf_low - priv->scan_start_tsf,
2593                                      phy_flags, channel);
2594                 }
2595         }
2596         if (print_dump)
2597                 iwl_print_hex_dump(priv, IWL_DL_RX, data, length);
2598 }
2599 #else
2600 static inline void iwl4965_dbg_report_frame(struct iwl_priv *priv,
2601                                             struct iwl_rx_packet *pkt,
2602                                             struct ieee80211_hdr *header,
2603                                             int group100)
2604 {
2605 }
2606 #endif
2607
2608
2609
2610 /* Called for REPLY_RX (legacy ABG frames), or
2611  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
2612 void iwl4965_rx_reply_rx(struct iwl_priv *priv,
2613                                 struct iwl_rx_mem_buffer *rxb)
2614 {
2615         struct ieee80211_hdr *header;
2616         struct ieee80211_rx_status rx_status;
2617         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2618         /* Use phy data (Rx signal strength, etc.) contained within
2619          *   this rx packet for legacy frames,
2620          *   or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
2621         int include_phy = (pkt->hdr.cmd == REPLY_RX);
2622         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
2623                 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
2624                 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
2625         __le32 *rx_end;
2626         unsigned int len = 0;
2627         u16 fc;
2628         u8 network_packet;
2629
2630         rx_status.mactime = le64_to_cpu(rx_start->timestamp);
2631         rx_status.freq =
2632                 ieee80211_channel_to_frequency(le16_to_cpu(rx_start->channel));
2633         rx_status.band = (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
2634                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
2635         rx_status.rate_idx =
2636                 iwl4965_hwrate_to_plcp_idx(le32_to_cpu(rx_start->rate_n_flags));
2637         if (rx_status.band == IEEE80211_BAND_5GHZ)
2638                 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
2639
2640         rx_status.antenna = 0;
2641         rx_status.flag = 0;
2642
2643         if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
2644                 IWL_DEBUG_DROP("dsp size out of range [0,20]: %d/n",
2645                                 rx_start->cfg_phy_cnt);
2646                 return;
2647         }
2648
2649         if (!include_phy) {
2650                 if (priv->last_phy_res[0])
2651                         rx_start = (struct iwl4965_rx_phy_res *)
2652                                 &priv->last_phy_res[1];
2653                 else
2654                         rx_start = NULL;
2655         }
2656
2657         if (!rx_start) {
2658                 IWL_ERROR("MPDU frame without a PHY data\n");
2659                 return;
2660         }
2661
2662         if (include_phy) {
2663                 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
2664                                                   + rx_start->cfg_phy_cnt);
2665
2666                 len = le16_to_cpu(rx_start->byte_count);
2667                 rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt +
2668                                   sizeof(struct iwl4965_rx_phy_res) + len);
2669         } else {
2670                 struct iwl4965_rx_mpdu_res_start *amsdu =
2671                         (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
2672
2673                 header = (void *)(pkt->u.raw +
2674                         sizeof(struct iwl4965_rx_mpdu_res_start));
2675                 len = le16_to_cpu(amsdu->byte_count);
2676                 rx_end = (__le32 *) (pkt->u.raw +
2677                         sizeof(struct iwl4965_rx_mpdu_res_start) + len);
2678         }
2679
2680         if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
2681             !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
2682                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
2683                                 le32_to_cpu(*rx_end));
2684                 return;
2685         }
2686
2687         priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
2688
2689         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
2690         rx_status.signal = iwl4965_calc_rssi(priv, rx_start);
2691
2692         /* Meaningful noise values are available only from beacon statistics,
2693          *   which are gathered only when associated, and indicate noise
2694          *   only for the associated network channel ...
2695          * Ignore these noise values while scanning (other channels) */
2696         if (iwl_is_associated(priv) &&
2697             !test_bit(STATUS_SCANNING, &priv->status)) {
2698                 rx_status.noise = priv->last_rx_noise;
2699                 rx_status.qual = iwl4965_calc_sig_qual(rx_status.signal,
2700                                                          rx_status.noise);
2701         } else {
2702                 rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
2703                 rx_status.qual = iwl4965_calc_sig_qual(rx_status.signal, 0);
2704         }
2705
2706         /* Reset beacon noise level if not associated. */
2707         if (!iwl_is_associated(priv))
2708                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
2709
2710         /* Set "1" to report good data frames in groups of 100 */
2711         /* FIXME: need to optimze the call: */
2712         iwl4965_dbg_report_frame(priv, pkt, header, 1);
2713
2714         IWL_DEBUG_STATS_LIMIT("Rssi %d, noise %d, qual %d, TSF %llu\n",
2715                               rx_status.signal, rx_status.noise, rx_status.signal,
2716                               (unsigned long long)rx_status.mactime);
2717
2718
2719         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
2720                 iwl4965_handle_data_packet(priv, 1, include_phy,
2721                                                  rxb, &rx_status);
2722                 return;
2723         }
2724
2725         network_packet = iwl4965_is_network_packet(priv, header);
2726         if (network_packet) {
2727                 priv->last_rx_rssi = rx_status.signal;
2728                 priv->last_beacon_time =  priv->ucode_beacon_time;
2729                 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
2730         }
2731
2732         fc = le16_to_cpu(header->frame_control);
2733         switch (fc & IEEE80211_FCTL_FTYPE) {
2734         case IEEE80211_FTYPE_MGMT:
2735                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
2736                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
2737                                                 header->addr2);
2738                 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &rx_status);
2739                 break;
2740
2741         case IEEE80211_FTYPE_CTL:
2742                 switch (fc & IEEE80211_FCTL_STYPE) {
2743                 case IEEE80211_STYPE_BACK_REQ:
2744                         IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
2745                         iwl4965_handle_data_packet(priv, 0, include_phy,
2746                                                 rxb, &rx_status);
2747                         break;
2748                 default:
2749                         break;
2750                 }
2751                 break;
2752
2753         case IEEE80211_FTYPE_DATA: {
2754                 DECLARE_MAC_BUF(mac1);
2755                 DECLARE_MAC_BUF(mac2);
2756                 DECLARE_MAC_BUF(mac3);
2757
2758                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
2759                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
2760                                                 header->addr2);
2761
2762                 if (unlikely(!network_packet))
2763                         IWL_DEBUG_DROP("Dropping (non network): "
2764                                        "%s, %s, %s\n",
2765                                        print_mac(mac1, header->addr1),
2766                                        print_mac(mac2, header->addr2),
2767                                        print_mac(mac3, header->addr3));
2768                 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
2769                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
2770                                        print_mac(mac1, header->addr1),
2771                                        print_mac(mac2, header->addr2),
2772                                        print_mac(mac3, header->addr3));
2773                 else
2774                         iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
2775                                                    &rx_status);
2776                 break;
2777         }
2778         default:
2779                 break;
2780
2781         }
2782 }
2783
2784 /**
2785  * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
2786  *
2787  * Go through block-ack's bitmap of ACK'd frames, update driver's record of
2788  * ACK vs. not.  This gets sent to mac80211, then to rate scaling algo.
2789  */
2790 static int iwl4965_tx_status_reply_compressed_ba(struct iwl_priv *priv,
2791                                                  struct iwl_ht_agg *agg,
2792                                                  struct iwl4965_compressed_ba_resp*
2793                                                  ba_resp)
2794
2795 {
2796         int i, sh, ack;
2797         u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
2798         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
2799         u64 bitmap;
2800         int successes = 0;
2801         struct ieee80211_tx_info *info;
2802
2803         if (unlikely(!agg->wait_for_ba))  {
2804                 IWL_ERROR("Received BA when not expected\n");
2805                 return -EINVAL;
2806         }
2807
2808         /* Mark that the expected block-ack response arrived */
2809         agg->wait_for_ba = 0;
2810         IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
2811
2812         /* Calculate shift to align block-ack bits with our Tx window bits */
2813         sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
2814         if (sh < 0) /* tbw something is wrong with indices */
2815                 sh += 0x100;
2816
2817         /* don't use 64-bit values for now */
2818         bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
2819
2820         if (agg->frame_count > (64 - sh)) {
2821                 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
2822                 return -1;
2823         }
2824
2825         /* check for success or failure according to the
2826          * transmitted bitmap and block-ack bitmap */
2827         bitmap &= agg->bitmap;
2828
2829         /* For each frame attempted in aggregation,
2830          * update driver's record of tx frame's status. */
2831         for (i = 0; i < agg->frame_count ; i++) {
2832                 ack = bitmap & (1 << i);
2833                 successes += !!ack;
2834                 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
2835                         ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
2836                         agg->start_idx + i);
2837         }
2838
2839         info = IEEE80211_SKB_CB(priv->txq[scd_flow].txb[agg->start_idx].skb[0]);
2840         memset(&info->status, 0, sizeof(info->status));
2841         info->flags = IEEE80211_TX_STAT_ACK;
2842         info->flags |= IEEE80211_TX_STAT_AMPDU;
2843         info->status.ampdu_ack_map = successes;
2844         info->status.ampdu_ack_len = agg->frame_count;
2845         iwl4965_hwrate_to_tx_control(priv, agg->rate_n_flags, info);
2846
2847         IWL_DEBUG_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap);
2848
2849         return 0;
2850 }
2851
2852 /**
2853  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
2854  */
2855 static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
2856                                             u16 txq_id)
2857 {
2858         /* Simply stop the queue, but don't change any configuration;
2859          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
2860         iwl_write_prph(priv,
2861                 IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
2862                 (0 << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE)|
2863                 (1 << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
2864 }
2865
2866 /**
2867  * txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE
2868  * priv->lock must be held by the caller
2869  */
2870 static int iwl4965_txq_agg_disable(struct iwl_priv *priv, u16 txq_id,
2871                                    u16 ssn_idx, u8 tx_fifo)
2872 {
2873         int ret = 0;
2874
2875         if (IWL49_FIRST_AMPDU_QUEUE > txq_id) {
2876                 IWL_WARNING("queue number too small: %d, must be > %d\n",
2877                                 txq_id, IWL49_FIRST_AMPDU_QUEUE);
2878                 return -EINVAL;
2879         }
2880
2881         ret = iwl_grab_nic_access(priv);
2882         if (ret)
2883                 return ret;
2884
2885         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
2886
2887         iwl_clear_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
2888
2889         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
2890         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
2891         /* supposes that ssn_idx is valid (!= 0xFFF) */
2892         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
2893
2894         iwl_clear_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
2895         iwl_txq_ctx_deactivate(priv, txq_id);
2896         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
2897
2898         iwl_release_nic_access(priv);
2899
2900         return 0;
2901 }
2902
2903
2904 /**
2905  * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
2906  *
2907  * Handles block-acknowledge notification from device, which reports success
2908  * of frames sent via aggregation.
2909  */
2910 static void iwl4965_rx_reply_compressed_ba(struct iwl_priv *priv,
2911                                            struct iwl_rx_mem_buffer *rxb)
2912 {
2913         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2914         struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
2915         int index;
2916         struct iwl_tx_queue *txq = NULL;
2917         struct iwl_ht_agg *agg;
2918         DECLARE_MAC_BUF(mac);
2919
2920         /* "flow" corresponds to Tx queue */
2921         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
2922
2923         /* "ssn" is start of block-ack Tx window, corresponds to index
2924          * (in Tx queue's circular buffer) of first TFD/frame in window */
2925         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
2926
2927         if (scd_flow >= priv->hw_params.max_txq_num) {
2928                 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
2929                 return;
2930         }
2931
2932         txq = &priv->txq[scd_flow];
2933         agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
2934
2935         /* Find index just before block-ack window */
2936         index = iwl_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
2937
2938         /* TODO: Need to get this copy more safely - now good for debug */
2939
2940         IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
2941                            "sta_id = %d\n",
2942                            agg->wait_for_ba,
2943                            print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
2944                            ba_resp->sta_id);
2945         IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
2946                            "%d, scd_ssn = %d\n",
2947                            ba_resp->tid,
2948                            ba_resp->seq_ctl,
2949                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
2950                            ba_resp->scd_flow,
2951                            ba_resp->scd_ssn);
2952         IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
2953                            agg->start_idx,
2954                            (unsigned long long)agg->bitmap);
2955
2956         /* Update driver's record of ACK vs. not for each frame in window */
2957         iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
2958
2959         /* Release all TFDs before the SSN, i.e. all TFDs in front of
2960          * block-ack window (we assume that they've been successfully
2961          * transmitted ... if not, it's too late anyway). */
2962         if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
2963                 /* calculate mac80211 ampdu sw queue to wake */
2964                 int ampdu_q =
2965                    scd_flow - priv->hw_params.first_ampdu_q + priv->hw->queues;
2966                 int freed = iwl_tx_queue_reclaim(priv, scd_flow, index);
2967                 priv->stations[ba_resp->sta_id].
2968                         tid[ba_resp->tid].tfds_in_queue -= freed;
2969                 if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
2970                         priv->mac80211_registered &&
2971                         agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2972                         ieee80211_wake_queue(priv->hw, ampdu_q);
2973
2974                 iwl_txq_check_empty(priv, ba_resp->sta_id,
2975                                     ba_resp->tid, scd_flow);
2976         }
2977 }
2978
2979 /**
2980  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
2981  */
2982 static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
2983                                         u16 txq_id)
2984 {
2985         u32 tbl_dw_addr;
2986         u32 tbl_dw;
2987         u16 scd_q2ratid;
2988
2989         scd_q2ratid = ra_tid & IWL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
2990
2991         tbl_dw_addr = priv->scd_base_addr +
2992                         IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
2993
2994         tbl_dw = iwl_read_targ_mem(priv, tbl_dw_addr);
2995
2996         if (txq_id & 0x1)
2997                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
2998         else
2999                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
3000
3001         iwl_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
3002
3003         return 0;
3004 }
3005
3006
3007 /**
3008  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
3009  *
3010  * NOTE:  txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE,
3011  *        i.e. it must be one of the higher queues used for aggregation
3012  */
3013 static int iwl4965_txq_agg_enable(struct iwl_priv *priv, int txq_id,
3014                                   int tx_fifo, int sta_id, int tid, u16 ssn_idx)
3015 {
3016         unsigned long flags;
3017         int ret;
3018         u16 ra_tid;
3019
3020         if (IWL49_FIRST_AMPDU_QUEUE > txq_id)
3021                 IWL_WARNING("queue number too small: %d, must be > %d\n",
3022                         txq_id, IWL49_FIRST_AMPDU_QUEUE);
3023
3024         ra_tid = BUILD_RAxTID(sta_id, tid);
3025
3026         /* Modify device's station table to Tx this TID */
3027         iwl_sta_modify_enable_tid_tx(priv, sta_id, tid);
3028
3029         spin_lock_irqsave(&priv->lock, flags);
3030         ret = iwl_grab_nic_access(priv);
3031         if (ret) {
3032                 spin_unlock_irqrestore(&priv->lock, flags);
3033                 return ret;
3034         }
3035
3036         /* Stop this Tx queue before configuring it */
3037         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
3038
3039         /* Map receiver-address / traffic-ID to this queue */
3040         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
3041
3042         /* Set this queue as a chain-building queue */
3043         iwl_set_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
3044
3045         /* Place first TFD at index corresponding to start sequence number.
3046          * Assumes that ssn_idx is valid (!= 0xFFF) */
3047         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
3048         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
3049         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
3050
3051         /* Set up Tx window size and frame limit for this queue */
3052         iwl_write_targ_mem(priv,
3053                 priv->scd_base_addr + IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
3054                 (SCD_WIN_SIZE << IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
3055                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
3056
3057         iwl_write_targ_mem(priv, priv->scd_base_addr +
3058                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
3059                 (SCD_FRAME_LIMIT << IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
3060                 & IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
3061
3062         iwl_set_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
3063
3064         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
3065         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
3066
3067         iwl_release_nic_access(priv);
3068         spin_unlock_irqrestore(&priv->lock, flags);
3069
3070         return 0;
3071 }
3072
3073 static int iwl4965_rx_agg_start(struct iwl_priv *priv,
3074                                 const u8 *addr, int tid, u16 ssn)
3075 {
3076         unsigned long flags;
3077         int sta_id;
3078
3079         sta_id = iwl_find_station(priv, addr);
3080         if (sta_id == IWL_INVALID_STATION)
3081                 return -ENXIO;
3082
3083         spin_lock_irqsave(&priv->sta_lock, flags);
3084         priv->stations[sta_id].sta.station_flags_msk = 0;
3085         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
3086         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
3087         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
3088         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3089         spin_unlock_irqrestore(&priv->sta_lock, flags);
3090
3091         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
3092                                         CMD_ASYNC);
3093 }
3094
3095 static int iwl4965_rx_agg_stop(struct iwl_priv *priv,
3096                                const u8 *addr, int tid)
3097 {
3098         unsigned long flags;
3099         int sta_id;
3100
3101         sta_id = iwl_find_station(priv, addr);
3102         if (sta_id == IWL_INVALID_STATION)
3103                 return -ENXIO;
3104
3105         spin_lock_irqsave(&priv->sta_lock, flags);
3106         priv->stations[sta_id].sta.station_flags_msk = 0;
3107         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
3108         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
3109         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3110         spin_unlock_irqrestore(&priv->sta_lock, flags);
3111
3112         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
3113                                         CMD_ASYNC);
3114 }
3115
3116 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
3117                              enum ieee80211_ampdu_mlme_action action,
3118                              const u8 *addr, u16 tid, u16 *ssn)
3119 {
3120         struct iwl_priv *priv = hw->priv;
3121         DECLARE_MAC_BUF(mac);
3122
3123         IWL_DEBUG_HT("A-MPDU action on addr %s tid %d\n",
3124                      print_mac(mac, addr), tid);
3125
3126         switch (action) {
3127         case IEEE80211_AMPDU_RX_START:
3128                 IWL_DEBUG_HT("start Rx\n");
3129                 return iwl4965_rx_agg_start(priv, addr, tid, *ssn);
3130         case IEEE80211_AMPDU_RX_STOP:
3131                 IWL_DEBUG_HT("stop Rx\n");
3132                 return iwl4965_rx_agg_stop(priv, addr, tid);
3133         case IEEE80211_AMPDU_TX_START:
3134                 IWL_DEBUG_HT("start Tx\n");
3135                 return iwl_tx_agg_start(priv, addr, tid, ssn);
3136         case IEEE80211_AMPDU_TX_STOP:
3137                 IWL_DEBUG_HT("stop Tx\n");
3138                 return iwl_tx_agg_stop(priv, addr, tid);
3139         default:
3140                 IWL_DEBUG_HT("unknown\n");
3141                 return -EINVAL;
3142                 break;
3143         }
3144         return 0;
3145 }
3146
3147 static u16 iwl4965_get_hcmd_size(u8 cmd_id, u16 len)
3148 {
3149         switch (cmd_id) {
3150         case REPLY_RXON:
3151                 return (u16) sizeof(struct iwl4965_rxon_cmd);
3152         default:
3153                 return len;
3154         }
3155 }
3156
3157 static u16 iwl4965_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
3158 {
3159         struct iwl4965_addsta_cmd *addsta = (struct iwl4965_addsta_cmd *)data;
3160         addsta->mode = cmd->mode;
3161         memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
3162         memcpy(&addsta->key, &cmd->key, sizeof(struct iwl4965_keyinfo));
3163         addsta->station_flags = cmd->station_flags;
3164         addsta->station_flags_msk = cmd->station_flags_msk;
3165         addsta->tid_disable_tx = cmd->tid_disable_tx;
3166         addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
3167         addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
3168         addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
3169         addsta->reserved1 = __constant_cpu_to_le16(0);
3170         addsta->reserved2 = __constant_cpu_to_le32(0);
3171
3172         return (u16)sizeof(struct iwl4965_addsta_cmd);
3173 }
3174
3175 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
3176 {
3177         return le32_to_cpup(&tx_resp->u.status + tx_resp->frame_count) & MAX_SN;
3178 }
3179
3180 /**
3181  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
3182  */
3183 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
3184                                       struct iwl_ht_agg *agg,
3185                                       struct iwl4965_tx_resp *tx_resp,
3186                                       int txq_id, u16 start_idx)
3187 {
3188         u16 status;
3189         struct agg_tx_status *frame_status = tx_resp->u.agg_status;
3190         struct ieee80211_tx_info *info = NULL;
3191         struct ieee80211_hdr *hdr = NULL;
3192         int i, sh, idx;
3193         u16 seq;
3194
3195         if (agg->wait_for_ba)
3196                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
3197
3198         agg->frame_count = tx_resp->frame_count;
3199         agg->start_idx = start_idx;
3200         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3201         agg->bitmap = 0;
3202
3203         /* # frames attempted by Tx command */
3204         if (agg->frame_count == 1) {
3205                 /* Only one frame was attempted; no block-ack will arrive */
3206                 status = le16_to_cpu(frame_status[0].status);
3207                 idx = start_idx;
3208
3209                 /* FIXME: code repetition */
3210                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
3211                                    agg->frame_count, agg->start_idx, idx);
3212
3213                 info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb[0]);
3214                 info->status.retry_count = tx_resp->failure_frame;
3215                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3216                 info->flags |= iwl_is_tx_success(status)?
3217                         IEEE80211_TX_STAT_ACK : 0;
3218                 iwl4965_hwrate_to_tx_control(priv,
3219                                              le32_to_cpu(tx_resp->rate_n_flags),
3220                                              info);
3221                 /* FIXME: code repetition end */
3222
3223                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3224                                     status & 0xff, tx_resp->failure_frame);
3225                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3226                         iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3227
3228                 agg->wait_for_ba = 0;
3229         } else {
3230                 /* Two or more frames were attempted; expect block-ack */
3231                 u64 bitmap = 0;
3232                 int start = agg->start_idx;
3233
3234                 /* Construct bit-map of pending frames within Tx window */
3235                 for (i = 0; i < agg->frame_count; i++) {
3236                         u16 sc;
3237                         status = le16_to_cpu(frame_status[i].status);
3238                         seq  = le16_to_cpu(frame_status[i].sequence);
3239                         idx = SEQ_TO_INDEX(seq);
3240                         txq_id = SEQ_TO_QUEUE(seq);
3241
3242                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3243                                       AGG_TX_STATE_ABORT_MSK))
3244                                 continue;
3245
3246                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3247                                            agg->frame_count, txq_id, idx);
3248
3249                         hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
3250
3251                         sc = le16_to_cpu(hdr->seq_ctrl);
3252                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3253                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
3254                                           " idx=%d, seq_idx=%d, seq=%d\n",
3255                                           idx, SEQ_TO_SN(sc),
3256                                           hdr->seq_ctrl);
3257                                 return -1;
3258                         }
3259
3260                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3261                                            i, idx, SEQ_TO_SN(sc));
3262
3263                         sh = idx - start;
3264                         if (sh > 64) {
3265                                 sh = (start - idx) + 0xff;
3266                                 bitmap = bitmap << sh;
3267                                 sh = 0;
3268                                 start = idx;
3269                         } else if (sh < -64)
3270                                 sh  = 0xff - (start - idx);
3271                         else if (sh < 0) {
3272                                 sh = start - idx;
3273                                 start = idx;
3274                                 bitmap = bitmap << sh;
3275                                 sh = 0;
3276                         }
3277                         bitmap |= (1 << sh);
3278                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3279                                            start, (u32)(bitmap & 0xFFFFFFFF));
3280                 }
3281
3282                 agg->bitmap = bitmap;
3283                 agg->start_idx = start;
3284                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3285                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
3286                                    agg->frame_count, agg->start_idx,
3287                                    (unsigned long long)agg->bitmap);
3288
3289                 if (bitmap)
3290                         agg->wait_for_ba = 1;
3291         }
3292         return 0;
3293 }
3294
3295 /**
3296  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
3297  */
3298 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
3299                                 struct iwl_rx_mem_buffer *rxb)
3300 {
3301         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3302         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3303         int txq_id = SEQ_TO_QUEUE(sequence);
3304         int index = SEQ_TO_INDEX(sequence);
3305         struct iwl_tx_queue *txq = &priv->txq[txq_id];
3306         struct ieee80211_tx_info *info;
3307         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3308         u32  status = le32_to_cpu(tx_resp->u.status);
3309         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
3310         u16 fc;
3311         struct ieee80211_hdr *hdr;
3312         u8 *qc = NULL;
3313
3314         if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
3315                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3316                           "is out of range [0-%d] %d %d\n", txq_id,
3317                           index, txq->q.n_bd, txq->q.write_ptr,
3318                           txq->q.read_ptr);
3319                 return;
3320         }
3321
3322         info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]);
3323         memset(&info->status, 0, sizeof(info->status));
3324
3325         hdr = iwl_tx_queue_get_hdr(priv, txq_id, index);
3326         fc = le16_to_cpu(hdr->frame_control);
3327         if (ieee80211_is_qos_data(fc)) {
3328                 qc = ieee80211_get_qos_ctrl(hdr, ieee80211_get_hdrlen(fc));
3329                 tid = qc[0] & 0xf;
3330         }
3331
3332         sta_id = iwl_get_ra_sta_id(priv, hdr);
3333         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
3334                 IWL_ERROR("Station not known\n");
3335                 return;
3336         }
3337
3338         if (txq->sched_retry) {
3339                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
3340                 struct iwl_ht_agg *agg = NULL;
3341
3342                 if (!qc)
3343                         return;
3344
3345                 agg = &priv->stations[sta_id].tid[tid].agg;
3346
3347                 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
3348
3349                 if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status)) {
3350                         /* TODO: send BAR */
3351                 }
3352
3353                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
3354                         int freed, ampdu_q;
3355                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3356                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3357                                            "%d index %d\n", scd_ssn , index);
3358                         freed = iwl_tx_queue_reclaim(priv, txq_id, index);
3359                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3360
3361                         if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
3362                             txq_id >= 0 && priv->mac80211_registered &&
3363                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA) {
3364                                 /* calculate mac80211 ampdu sw queue to wake */
3365                                 ampdu_q = txq_id - IWL49_FIRST_AMPDU_QUEUE +
3366                                           priv->hw->queues;
3367                                 if (agg->state == IWL_AGG_OFF)
3368                                         ieee80211_wake_queue(priv->hw, txq_id);
3369                                 else
3370                                         ieee80211_wake_queue(priv->hw, ampdu_q);
3371                         }
3372                         iwl_txq_check_empty(priv, sta_id, tid, txq_id);
3373                 }
3374         } else {
3375                 info->status.retry_count = tx_resp->failure_frame;
3376                 info->flags |=
3377                         iwl_is_tx_success(status) ? IEEE80211_TX_STAT_ACK : 0;
3378                 iwl4965_hwrate_to_tx_control(priv,
3379                                         le32_to_cpu(tx_resp->rate_n_flags),
3380                                         info);
3381
3382                 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags "
3383                              "0x%x retries %d\n", txq_id,
3384                                 iwl_get_tx_fail_reason(status),
3385                                 status, le32_to_cpu(tx_resp->rate_n_flags),
3386                                 tx_resp->failure_frame);
3387
3388                 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3389                 if (index != -1) {
3390                     int freed = iwl_tx_queue_reclaim(priv, txq_id, index);
3391                     if (tid != MAX_TID_COUNT)
3392                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3393                     if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
3394                         (txq_id >= 0) && priv->mac80211_registered)
3395                         ieee80211_wake_queue(priv->hw, txq_id);
3396                     if (tid != MAX_TID_COUNT)
3397                         iwl_txq_check_empty(priv, sta_id, tid, txq_id);
3398                 }
3399         }
3400
3401         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3402                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3403 }
3404
3405
3406 /* Set up 4965-specific Rx frame reply handlers */
3407 static void iwl4965_rx_handler_setup(struct iwl_priv *priv)
3408 {
3409         /* Legacy Rx frames */
3410         priv->rx_handlers[REPLY_RX] = iwl4965_rx_reply_rx;
3411         /* Tx response */
3412         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3413         /* block ack */
3414         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
3415 }
3416
3417 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
3418 {
3419         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
3420 }
3421
3422 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
3423 {
3424         cancel_work_sync(&priv->txpower_work);
3425 }
3426
3427
3428 static struct iwl_hcmd_ops iwl4965_hcmd = {
3429         .rxon_assoc = iwl4965_send_rxon_assoc,
3430 };
3431
3432 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
3433         .get_hcmd_size = iwl4965_get_hcmd_size,
3434         .build_addsta_hcmd = iwl4965_build_addsta_hcmd,
3435         .chain_noise_reset = iwl4965_chain_noise_reset,
3436         .gain_computation = iwl4965_gain_computation,
3437 };
3438
3439 static struct iwl_lib_ops iwl4965_lib = {
3440         .set_hw_params = iwl4965_hw_set_hw_params,
3441         .alloc_shared_mem = iwl4965_alloc_shared_mem,
3442         .free_shared_mem = iwl4965_free_shared_mem,
3443         .shared_mem_rx_idx = iwl4965_shared_mem_rx_idx,
3444         .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
3445         .txq_set_sched = iwl4965_txq_set_sched,
3446         .txq_agg_enable = iwl4965_txq_agg_enable,
3447         .txq_agg_disable = iwl4965_txq_agg_disable,
3448         .rx_handler_setup = iwl4965_rx_handler_setup,
3449         .setup_deferred_work = iwl4965_setup_deferred_work,
3450         .cancel_deferred_work = iwl4965_cancel_deferred_work,
3451         .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
3452         .alive_notify = iwl4965_alive_notify,
3453         .init_alive_start = iwl4965_init_alive_start,
3454         .load_ucode = iwl4965_load_bsm,
3455         .apm_ops = {
3456                 .init = iwl4965_apm_init,
3457                 .reset = iwl4965_apm_reset,
3458                 .stop = iwl4965_apm_stop,
3459                 .config = iwl4965_nic_config,
3460                 .set_pwr_src = iwl4965_set_pwr_src,
3461         },
3462         .eeprom_ops = {
3463                 .regulatory_bands = {
3464                         EEPROM_REGULATORY_BAND_1_CHANNELS,
3465                         EEPROM_REGULATORY_BAND_2_CHANNELS,
3466                         EEPROM_REGULATORY_BAND_3_CHANNELS,
3467                         EEPROM_REGULATORY_BAND_4_CHANNELS,
3468                         EEPROM_REGULATORY_BAND_5_CHANNELS,
3469                         EEPROM_4965_REGULATORY_BAND_24_FAT_CHANNELS,
3470                         EEPROM_4965_REGULATORY_BAND_52_FAT_CHANNELS
3471                 },
3472                 .verify_signature  = iwlcore_eeprom_verify_signature,
3473                 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
3474                 .release_semaphore = iwlcore_eeprom_release_semaphore,
3475                 .check_version = iwl4965_eeprom_check_version,
3476                 .query_addr = iwlcore_eeprom_query_addr,
3477         },
3478         .radio_kill_sw = iwl4965_radio_kill_sw,
3479         .set_power = iwl4965_set_power,
3480         .send_tx_power  = iwl4965_send_tx_power,
3481         .update_chain_flags = iwl4965_update_chain_flags,
3482 };
3483
3484 static struct iwl_ops iwl4965_ops = {
3485         .lib = &iwl4965_lib,
3486         .hcmd = &iwl4965_hcmd,
3487         .utils = &iwl4965_hcmd_utils,
3488 };
3489
3490 struct iwl_cfg iwl4965_agn_cfg = {
3491         .name = "4965AGN",
3492         .fw_name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode",
3493         .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
3494         .eeprom_size = IWL4965_EEPROM_IMG_SIZE,
3495         .ops = &iwl4965_ops,
3496         .mod_params = &iwl4965_mod_params,
3497 };
3498
3499 module_param_named(antenna, iwl4965_mod_params.antenna, int, 0444);
3500 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
3501 module_param_named(disable, iwl4965_mod_params.disable, int, 0444);
3502 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
3503 module_param_named(swcrypto, iwl4965_mod_params.sw_crypto, int, 0444);
3504 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])\n");
3505 module_param_named(debug, iwl4965_mod_params.debug, int, 0444);
3506 MODULE_PARM_DESC(debug, "debug output mask");
3507 module_param_named(
3508         disable_hw_scan, iwl4965_mod_params.disable_hw_scan, int, 0444);
3509 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
3510
3511 module_param_named(queues_num, iwl4965_mod_params.num_of_queues, int, 0444);
3512 MODULE_PARM_DESC(queues_num, "number of hw queues.");
3513
3514 /* QoS */
3515 module_param_named(qos_enable, iwl4965_mod_params.enable_qos, int, 0444);
3516 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
3517 module_param_named(amsdu_size_8K, iwl4965_mod_params.amsdu_size_8K, int, 0444);
3518 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
3519 module_param_named(fw_restart4965, iwl4965_mod_params.restart_fw, int, 0444);
3520 MODULE_PARM_DESC(fw_restart4965, "restart firmware in case of error");