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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/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 /* module parameters */
  50 static struct iwl_mod_params iwl4965_mod_params = {
  51         .num_of_queues = IWL49_NUM_QUEUES,
  52         .enable_qos = 1,
  53         .amsdu_size_8K = 1,
  54         .restart_fw = 1,
  55         /* the rest are 0 by default */
  56 };
  57
  58 /* check contents of special bootstrap uCode SRAM */
  59 static int iwl4965_verify_bsm(struct iwl_priv *priv)
  60 {
  61         __le32 *image = priv->ucode_boot.v_addr;
  62         u32 len = priv->ucode_boot.len;
  63         u32 reg;
  64         u32 val;
  65
  66         IWL_DEBUG_INFO("Begin verify bsm\n");
  67
  68         /* verify BSM SRAM contents */
  69         val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
  70         for (reg = BSM_SRAM_LOWER_BOUND;
  71              reg < BSM_SRAM_LOWER_BOUND + len;
  72              reg += sizeof(u32), image++) {
  73                 val = iwl_read_prph(priv, reg);
  74                 if (val != le32_to_cpu(*image)) {
  75                         IWL_ERROR("BSM uCode verification failed at "
  76                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
  77                                   BSM_SRAM_LOWER_BOUND,
  78                                   reg - BSM_SRAM_LOWER_BOUND, len,
  79                                   val, le32_to_cpu(*image));
  80                         return -EIO;
  81                 }
  82         }
  83
  84         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
  85
  86         return 0;
  87 }
  88
  89 /**
  90  * iwl4965_load_bsm - Load bootstrap instructions
  91  *
  92  * BSM operation:
  93  *
  94  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
  95  * in special SRAM that does not power down during RFKILL.  When powering back
  96  * up after power-saving sleeps (or during initial uCode load), the BSM loads
  97  * the bootstrap program into the on-board processor, and starts it.
  98  *
  99  * The bootstrap program loads (via DMA) instructions and data for a new
 100  * program from host DRAM locations indicated by the host driver in the
 101  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
 102  * automatically.
 103  *
 104  * When initializing the NIC, the host driver points the BSM to the
 105  * "initialize" uCode image.  This uCode sets up some internal data, then
 106  * notifies host via "initialize alive" that it is complete.
 107  *
 108  * The host then replaces the BSM_DRAM_* pointer values to point to the
 109  * normal runtime uCode instructions and a backup uCode data cache buffer
 110  * (filled initially with starting data values for the on-board processor),
 111  * then triggers the "initialize" uCode to load and launch the runtime uCode,
 112  * which begins normal operation.
 113  *
 114  * When doing a power-save shutdown, runtime uCode saves data SRAM into
 115  * the backup data cache in DRAM before SRAM is powered down.
 116  *
 117  * When powering back up, the BSM loads the bootstrap program.  This reloads
 118  * the runtime uCode instructions and the backup data cache into SRAM,
 119  * and re-launches the runtime uCode from where it left off.
 120  */
 121 static int iwl4965_load_bsm(struct iwl_priv *priv)
 122 {
 123         __le32 *image = priv->ucode_boot.v_addr;
 124         u32 len = priv->ucode_boot.len;
 125         dma_addr_t pinst;
 126         dma_addr_t pdata;
 127         u32 inst_len;
 128         u32 data_len;
 129         int i;
 130         u32 done;
 131         u32 reg_offset;
 132         int ret;
 133
 134         IWL_DEBUG_INFO("Begin load bsm\n");
 135
 136         priv->ucode_type = UCODE_RT;
 137
 138         /* make sure bootstrap program is no larger than BSM's SRAM size */
 139         if (len > IWL_MAX_BSM_SIZE)
 140                 return -EINVAL;
 141
 142         /* Tell bootstrap uCode where to find the "Initialize" uCode
 143          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
 144          * NOTE:  iwl_init_alive_start() will replace these values,
 145          *        after the "initialize" uCode has run, to point to
 146          *        runtime/protocol instructions and backup data cache.
 147          */
 148         pinst = priv->ucode_init.p_addr >> 4;
 149         pdata = priv->ucode_init_data.p_addr >> 4;
 150         inst_len = priv->ucode_init.len;
 151         data_len = priv->ucode_init_data.len;
 152
 153         ret = iwl_grab_nic_access(priv);
 154         if (ret)
 155                 return ret;
 156
 157         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 158         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 159         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
 160         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
 161
 162         /* Fill BSM memory with bootstrap instructions */
 163         for (reg_offset = BSM_SRAM_LOWER_BOUND;
 164              reg_offset < BSM_SRAM_LOWER_BOUND + len;
 165              reg_offset += sizeof(u32), image++)
 166                 _iwl_write_prph(priv, reg_offset, le32_to_cpu(*image));
 167
 168         ret = iwl4965_verify_bsm(priv);
 169         if (ret) {
 170                 iwl_release_nic_access(priv);
 171                 return ret;
 172         }
 173
 174         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
 175         iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
 176         iwl_write_prph(priv, BSM_WR_MEM_DST_REG, RTC_INST_LOWER_BOUND);
 177         iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
 178
 179         /* Load bootstrap code into instruction SRAM now,
 180          *   to prepare to load "initialize" uCode */
 181         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);
 182
 183         /* Wait for load of bootstrap uCode to finish */
 184         for (i = 0; i < 100; i++) {
 185                 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
 186                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
 187                         break;
 188                 udelay(10);
 189         }
 190         if (i < 100)
 191                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
 192         else {
 193                 IWL_ERROR("BSM write did not complete!\n");
 194                 return -EIO;
 195         }
 196
 197         /* Enable future boot loads whenever power management unit triggers it
 198          *   (e.g. when powering back up after power-save shutdown) */
 199         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
 200
 201         iwl_release_nic_access(priv);
 202
 203         return 0;
 204 }
 205
 206 /**
 207  * iwl4965_set_ucode_ptrs - Set uCode address location
 208  *
 209  * Tell initialization uCode where to find runtime uCode.
 210  *
 211  * BSM registers initially contain pointers to initialization uCode.
 212  * We need to replace them to load runtime uCode inst and data,
 213  * and to save runtime data when powering down.
 214  */
 215 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
 216 {
 217         dma_addr_t pinst;
 218         dma_addr_t pdata;
 219         unsigned long flags;
 220         int ret = 0;
 221
 222         /* bits 35:4 for 4965 */
 223         pinst = priv->ucode_code.p_addr >> 4;
 224         pdata = priv->ucode_data_backup.p_addr >> 4;
 225
 226         spin_lock_irqsave(&priv->lock, flags);
 227         ret = iwl_grab_nic_access(priv);
 228         if (ret) {
 229                 spin_unlock_irqrestore(&priv->lock, flags);
 230                 return ret;
 231         }
 232
 233         /* Tell bootstrap uCode where to find image to load */
 234         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 235         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 236         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
 237                                  priv->ucode_data.len);
 238
 239         /* Inst bytecount must be last to set up, bit 31 signals uCode
 240          *   that all new ptr/size info is in place */
 241         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
 242                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
 243         iwl_release_nic_access(priv);
 244
 245         spin_unlock_irqrestore(&priv->lock, flags);
 246
 247         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
 248
 249         return ret;
 250 }
 251
 252 /**
 253  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
 254  *
 255  * Called after REPLY_ALIVE notification received from "initialize" uCode.
 256  *
 257  * The 4965 "initialize" ALIVE reply contains calibration data for:
 258  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
 259  *   (3945 does not contain this data).
 260  *
 261  * Tell "initialize" uCode to go ahead and load the runtime uCode.
 262 */
 263 static void iwl4965_init_alive_start(struct iwl_priv *priv)
 264 {
 265         /* Check alive response for "valid" sign from uCode */
 266         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
 267                 /* We had an error bringing up the hardware, so take it
 268                  * all the way back down so we can try again */
 269                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
 270                 goto restart;
 271         }
 272
 273         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
 274          * This is a paranoid check, because we would not have gotten the
 275          * "initialize" alive if code weren't properly loaded.  */
 276         if (iwl_verify_ucode(priv)) {
 277                 /* Runtime instruction load was bad;
 278                  * take it all the way back down so we can try again */
 279                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
 280                 goto restart;
 281         }
 282
 283         /* Calculate temperature */
 284         priv->temperature = iwl4965_get_temperature(priv);
 285
 286         /* Send pointers to protocol/runtime uCode image ... init code will
 287          * load and launch runtime uCode, which will send us another "Alive"
 288          * notification. */
 289         IWL_DEBUG_INFO("Initialization Alive received.\n");
 290         if (iwl4965_set_ucode_ptrs(priv)) {
 291                 /* Runtime instruction load won't happen;
 292                  * take it all the way back down so we can try again */
 293                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
 294                 goto restart;
 295         }
 296         return;
 297
 298 restart:
 299         queue_work(priv->workqueue, &priv->restart);
 300 }
 301
 302 static int is_fat_channel(__le32 rxon_flags)
 303 {
 304         return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
 305                 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
 306 }
 307
 308 int iwl4965_hwrate_to_plcp_idx(u32 rate_n_flags)
 309 {
 310         int idx = 0;
 311
 312         /* 4965 HT rate format */
 313         if (rate_n_flags & RATE_MCS_HT_MSK) {
 314                 idx = (rate_n_flags & 0xff);
 315
 316                 if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 317                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 318
 319                 idx += IWL_FIRST_OFDM_RATE;
 320                 /* skip 9M not supported in ht*/
 321                 if (idx >= IWL_RATE_9M_INDEX)
 322                         idx += 1;
 323                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 324                         return idx;
 325
 326         /* 4965 legacy rate format, search for match in table */
 327         } else {
 328                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 329                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 330                                 return idx;
 331         }
 332
 333         return -1;
 334 }
 335
 336 /**
 337  * translate ucode response to mac80211 tx status control values
 338  */
 339 void iwl4965_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 340                                   struct ieee80211_tx_info *control)
 341 {
 342         int rate_index;
 343
 344         control->antenna_sel_tx =
 345                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 346         if (rate_n_flags & RATE_MCS_HT_MSK)
 347                 control->flags |= IEEE80211_TX_CTL_OFDM_HT;
 348         if (rate_n_flags & RATE_MCS_GF_MSK)
 349                 control->flags |= IEEE80211_TX_CTL_GREEN_FIELD;
 350         if (rate_n_flags & RATE_MCS_FAT_MSK)
 351                 control->flags |= IEEE80211_TX_CTL_40_MHZ_WIDTH;
 352         if (rate_n_flags & RATE_MCS_DUP_MSK)
 353                 control->flags |= IEEE80211_TX_CTL_DUP_DATA;
 354         if (rate_n_flags & RATE_MCS_SGI_MSK)
 355                 control->flags |= IEEE80211_TX_CTL_SHORT_GI;
 356         rate_index = iwl4965_hwrate_to_plcp_idx(rate_n_flags);
 357         if (control->band == IEEE80211_BAND_5GHZ)
 358                 rate_index -= IWL_FIRST_OFDM_RATE;
 359         control->tx_rate_idx = rate_index;
 360 }
 361
 362 /*
 363  * EEPROM handlers
 364  */
 365
 366 static int iwl4965_eeprom_check_version(struct iwl_priv *priv)
 367 {
 368         u16 eeprom_ver;
 369         u16 calib_ver;
 370
 371         eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
 372
 373         calib_ver = iwl_eeprom_query16(priv, EEPROM_4965_CALIB_VERSION_OFFSET);
 374
 375         if (eeprom_ver < EEPROM_4965_EEPROM_VERSION ||
 376             calib_ver < EEPROM_4965_TX_POWER_VERSION)
 377                 goto err;
 378
 379         return 0;
 380 err:
 381         IWL_ERROR("Unsuported EEPROM VER=0x%x < 0x%x CALIB=0x%x < 0x%x\n",
 382                   eeprom_ver, EEPROM_4965_EEPROM_VERSION,
 383                   calib_ver, EEPROM_4965_TX_POWER_VERSION);
 384         return -EINVAL;
 385
 386 }
 387 int iwl4965_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 388 {
 389         int ret;
 390         unsigned long flags;
 391
 392         spin_lock_irqsave(&priv->lock, flags);
 393         ret = iwl_grab_nic_access(priv);
 394         if (ret) {
 395                 spin_unlock_irqrestore(&priv->lock, flags);
 396                 return ret;
 397         }
 398
 399         if (src == IWL_PWR_SRC_VAUX) {
 400                 u32 val;
 401                 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
 402                                             &val);
 403
 404                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) {
 405                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 406                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 407                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 408                 }
 409         } else {
 410                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 411                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 412                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 413         }
 414
 415         iwl_release_nic_access(priv);
 416         spin_unlock_irqrestore(&priv->lock, flags);
 417
 418         return ret;
 419 }
 420
 421 /*
 422  * Activate/Deactivat Tx DMA/FIFO channels according tx fifos mask
 423  * must be called under priv->lock and mac access
 424  */
 425 static void iwl4965_txq_set_sched(struct iwl_priv *priv, u32 mask)
 426 {
 427         iwl_write_prph(priv, IWL49_SCD_TXFACT, mask);
 428 }
 429
 430 static int iwl4965_apm_init(struct iwl_priv *priv)
 431 {
 432         int ret = 0;
 433
 434         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 435                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 436
 437         /* disable L0s without affecting L1 :don't wait for ICH L0s bug W/A) */
 438         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 439                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
 440
 441         /* set "initialization complete" bit to move adapter
 442          * D0U* --> D0A* state */
 443         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 444
 445         /* wait for clock stabilization */
 446         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
 447                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 448                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 449         if (ret < 0) {
 450                 IWL_DEBUG_INFO("Failed to init the card\n");
 451                 goto out;
 452         }
 453
 454         ret = iwl_grab_nic_access(priv);
 455         if (ret)
 456                 goto out;
 457
 458         /* enable DMA */
 459         iwl_write_prph(priv, APMG_CLK_CTRL_REG, APMG_CLK_VAL_DMA_CLK_RQT |
 460                                                 APMG_CLK_VAL_BSM_CLK_RQT);
 461
 462         udelay(20);
 463
 464         /* disable L1-Active */
 465         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 466                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 467
 468         iwl_release_nic_access(priv);
 469 out:
 470         return ret;
 471 }
 472
 473
 474 static void iwl4965_nic_config(struct iwl_priv *priv)
 475 {
 476         unsigned long flags;
 477         u32 val;
 478         u16 radio_cfg;
 479         u8 val_link;
 480
 481         spin_lock_irqsave(&priv->lock, flags);
 482
 483         if ((priv->rev_id & 0x80) == 0x80 && (priv->rev_id & 0x7f) < 8) {
 484                 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 485                 /* Enable No Snoop field */
 486                 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
 487                                        val & ~(1 << 11));
 488         }
 489
 490         pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
 491
 492         /* L1 is enabled by BIOS */
 493         if ((val_link & PCI_LINK_VAL_L1_EN) == PCI_LINK_VAL_L1_EN)
 494                 /* diable L0S disabled L1A enabled */
 495                 iwl_set_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 496         else
 497                 /* L0S enabled L1A disabled */
 498                 iwl_clear_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 499
 500         radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
 501
 502         /* write radio config values to register */
 503         if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) == EEPROM_4965_RF_CFG_TYPE_MAX)
 504                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 505                             EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
 506                             EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
 507                             EEPROM_RF_CFG_DASH_MSK(radio_cfg));
 508
 509         /* set CSR_HW_CONFIG_REG for uCode use */
 510         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 511                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 512                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
 513
 514         priv->calib_info = (struct iwl_eeprom_calib_info *)
 515                 iwl_eeprom_query_addr(priv, EEPROM_4965_CALIB_TXPOWER_OFFSET);
 516
 517         spin_unlock_irqrestore(&priv->lock, flags);
 518 }
 519
 520 static int iwl4965_apm_stop_master(struct iwl_priv *priv)
 521 {
 522         int ret = 0;
 523         unsigned long flags;
 524
 525         spin_lock_irqsave(&priv->lock, flags);
 526
 527         /* set stop master bit */
 528         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 529
 530         ret = iwl_poll_bit(priv, CSR_RESET,
 531                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
 532                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 533         if (ret < 0)
 534                 goto out;
 535
 536 out:
 537         spin_unlock_irqrestore(&priv->lock, flags);
 538         IWL_DEBUG_INFO("stop master\n");
 539
 540         return ret;
 541 }
 542
 543 static void iwl4965_apm_stop(struct iwl_priv *priv)
 544 {
 545         unsigned long flags;
 546
 547         iwl4965_apm_stop_master(priv);
 548
 549         spin_lock_irqsave(&priv->lock, flags);
 550
 551         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 552
 553         udelay(10);
 554
 555         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 556         spin_unlock_irqrestore(&priv->lock, flags);
 557 }
 558
 559 static int iwl4965_apm_reset(struct iwl_priv *priv)
 560 {
 561         int ret = 0;
 562         unsigned long flags;
 563
 564         iwl4965_apm_stop_master(priv);
 565
 566         spin_lock_irqsave(&priv->lock, flags);
 567
 568         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 569
 570         udelay(10);
 571
 572         /* FIXME: put here L1A -L0S w/a */
 573
 574         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 575
 576         ret = iwl_poll_bit(priv, CSR_RESET,
 577                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 578                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
 579
 580         if (ret)
 581                 goto out;
 582
 583         udelay(10);
 584
 585         ret = iwl_grab_nic_access(priv);
 586         if (ret)
 587                 goto out;
 588         /* Enable DMA and BSM Clock */
 589         iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT |
 590                                               APMG_CLK_VAL_BSM_CLK_RQT);
 591
 592         udelay(10);
 593
 594         /* disable L1A */
 595         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 596                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 597
 598         iwl_release_nic_access(priv);
 599
 600         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 601         wake_up_interruptible(&priv->wait_command_queue);
 602
 603 out:
 604         spin_unlock_irqrestore(&priv->lock, flags);
 605
 606         return ret;
 607 }
 608
 609 #define REG_RECALIB_PERIOD (60)
 610
 611 /**
 612  * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
 613  *
 614  * This callback is provided in order to send a statistics request.
 615  *
 616  * This timer function is continually reset to execute within
 617  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 618  * was received.  We need to ensure we receive the statistics in order
 619  * to update the temperature used for calibrating the TXPOWER.
 620  */
 621 static void iwl4965_bg_statistics_periodic(unsigned long data)
 622 {
 623         struct iwl_priv *priv = (struct iwl_priv *)data;
 624
 625         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 626                 return;
 627
 628         iwl_send_statistics_request(priv, CMD_ASYNC);
 629 }
 630
 631 void iwl4965_rf_kill_ct_config(struct iwl_priv *priv)
 632 {
 633         struct iwl4965_ct_kill_config cmd;
 634         unsigned long flags;
 635         int ret = 0;
 636
 637         spin_lock_irqsave(&priv->lock, flags);
 638         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 639                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 640         spin_unlock_irqrestore(&priv->lock, flags);
 641
 642         cmd.critical_temperature_R =
 643                 cpu_to_le32(priv->hw_params.ct_kill_threshold);
 644
 645         ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
 646                                sizeof(cmd), &cmd);
 647         if (ret)
 648                 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
 649         else
 650                 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded, "
 651                         "critical temperature is %d\n",
 652                         cmd.critical_temperature_R);
 653 }
 654
 655 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
 656
 657 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
 658  * Called after every association, but this runs only once!
 659  *  ... once chain noise is calibrated the first time, it's good forever.  */
 660 static void iwl4965_chain_noise_reset(struct iwl_priv *priv)
 661 {
 662         struct iwl_chain_noise_data *data = &(priv->chain_noise_data);
 663
 664         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
 665                 struct iwl4965_calibration_cmd cmd;
 666
 667                 memset(&cmd, 0, sizeof(cmd));
 668                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
 669                 cmd.diff_gain_a = 0;
 670                 cmd.diff_gain_b = 0;
 671                 cmd.diff_gain_c = 0;
 672                 if (iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 673                                  sizeof(cmd), &cmd))
 674                         IWL_ERROR("Could not send REPLY_PHY_CALIBRATION_CMD\n");
 675                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
 676                 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
 677         }
 678 }
 679
 680 static void iwl4965_gain_computation(struct iwl_priv *priv,
 681                 u32 *average_noise,
 682                 u16 min_average_noise_antenna_i,
 683                 u32 min_average_noise)
 684 {
 685         int i, ret;
 686         struct iwl_chain_noise_data *data = &priv->chain_noise_data;
 687
 688         data->delta_gain_code[min_average_noise_antenna_i] = 0;
 689
 690         for (i = 0; i < NUM_RX_CHAINS; i++) {
 691                 s32 delta_g = 0;
 692
 693                 if (!(data->disconn_array[i]) &&
 694                     (data->delta_gain_code[i] ==
 695                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
 696                         delta_g = average_noise[i] - min_average_noise;
 697                         data->delta_gain_code[i] = (u8)((delta_g * 10) / 15);
 698                         data->delta_gain_code[i] =
 699                                 min(data->delta_gain_code[i],
 700                                 (u8) CHAIN_NOISE_MAX_DELTA_GAIN_CODE);
 701
 702                         data->delta_gain_code[i] =
 703                                 (data->delta_gain_code[i] | (1 << 2));
 704                 } else {
 705                         data->delta_gain_code[i] = 0;
 706                 }
 707         }
 708         IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
 709                      data->delta_gain_code[0],
 710                      data->delta_gain_code[1],
 711                      data->delta_gain_code[2]);
 712
 713         /* Differential gain gets sent to uCode only once */
 714         if (!data->radio_write) {
 715                 struct iwl4965_calibration_cmd cmd;
 716                 data->radio_write = 1;
 717
 718                 memset(&cmd, 0, sizeof(cmd));
 719                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
 720                 cmd.diff_gain_a = data->delta_gain_code[0];
 721                 cmd.diff_gain_b = data->delta_gain_code[1];
 722                 cmd.diff_gain_c = data->delta_gain_code[2];
 723                 ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 724                                       sizeof(cmd), &cmd);
 725                 if (ret)
 726                         IWL_DEBUG_CALIB("fail sending cmd "
 727                                      "REPLY_PHY_CALIBRATION_CMD \n");
 728
 729                 /* TODO we might want recalculate
 730                  * rx_chain in rxon cmd */
 731
 732                 /* Mark so we run this algo only once! */
 733                 data->state = IWL_CHAIN_NOISE_CALIBRATED;
 734         }
 735         data->chain_noise_a = 0;
 736         data->chain_noise_b = 0;
 737         data->chain_noise_c = 0;
 738         data->chain_signal_a = 0;
 739         data->chain_signal_b = 0;
 740         data->chain_signal_c = 0;
 741         data->beacon_count = 0;
 742 }
 743
 744 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
 745 {
 746         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 747                         sensitivity_work);
 748
 749         mutex_lock(&priv->mutex);
 750
 751         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 752             test_bit(STATUS_SCANNING, &priv->status)) {
 753                 mutex_unlock(&priv->mutex);
 754                 return;
 755         }
 756
 757         if (priv->start_calib) {
 758                 iwl_chain_noise_calibration(priv, &priv->statistics);
 759
 760                 iwl_sensitivity_calibration(priv, &priv->statistics);
 761         }
 762
 763         mutex_unlock(&priv->mutex);
 764         return;
 765 }
 766 #endif /*CONFIG_IWL4965_RUN_TIME_CALIB*/
 767
 768 static void iwl4965_bg_txpower_work(struct work_struct *work)
 769 {
 770         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 771                         txpower_work);
 772
 773         /* If a scan happened to start before we got here
 774          * then just return; the statistics notification will
 775          * kick off another scheduled work to compensate for
 776          * any temperature delta we missed here. */
 777         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 778             test_bit(STATUS_SCANNING, &priv->status))
 779                 return;
 780
 781         mutex_lock(&priv->mutex);
 782
 783         /* Regardless of if we are assocaited, we must reconfigure the
 784          * TX power since frames can be sent on non-radar channels while
 785          * not associated */
 786         iwl4965_hw_reg_send_txpower(priv);
 787
 788         /* Update last_temperature to keep is_calib_needed from running
 789          * when it isn't needed... */
 790         priv->last_temperature = priv->temperature;
 791
 792         mutex_unlock(&priv->mutex);
 793 }
 794
 795 /*
 796  * Acquire priv->lock before calling this function !
 797  */
 798 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
 799 {
 800         iwl_write_direct32(priv, HBUS_TARG_WRPTR,
 801                              (index & 0xff) | (txq_id << 8));
 802         iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(txq_id), index);
 803 }
 804
 805 /**
 806  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
 807  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
 808  * @scd_retry: (1) Indicates queue will be used in aggregation mode
 809  *
 810  * NOTE:  Acquire priv->lock before calling this function !
 811  */
 812 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
 813                                         struct iwl_tx_queue *txq,
 814                                         int tx_fifo_id, int scd_retry)
 815 {
 816         int txq_id = txq->q.id;
 817
 818         /* Find out whether to activate Tx queue */
 819         int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
 820
 821         /* Set up and activate */
 822         iwl_write_prph(priv, IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
 823                          (active << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
 824                          (tx_fifo_id << IWL49_SCD_QUEUE_STTS_REG_POS_TXF) |
 825                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_WSL) |
 826                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
 827                          IWL49_SCD_QUEUE_STTS_REG_MSK);
 828
 829         txq->sched_retry = scd_retry;
 830
 831         IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
 832                        active ? "Activate" : "Deactivate",
 833                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
 834 }
 835
 836 static const u16 default_queue_to_tx_fifo[] = {
 837         IWL_TX_FIFO_AC3,
 838         IWL_TX_FIFO_AC2,
 839         IWL_TX_FIFO_AC1,
 840         IWL_TX_FIFO_AC0,
 841         IWL49_CMD_FIFO_NUM,
 842         IWL_TX_FIFO_HCCA_1,
 843         IWL_TX_FIFO_HCCA_2
 844 };
 845
 846 int iwl4965_alive_notify(struct iwl_priv *priv)
 847 {
 848         u32 a;
 849         int i = 0;
 850         unsigned long flags;
 851         int ret;
 852
 853         spin_lock_irqsave(&priv->lock, flags);
 854
 855         ret = iwl_grab_nic_access(priv);
 856         if (ret) {
 857                 spin_unlock_irqrestore(&priv->lock, flags);
 858                 return ret;
 859         }
 860
 861         /* Clear 4965's internal Tx Scheduler data base */
 862         priv->scd_base_addr = iwl_read_prph(priv, IWL49_SCD_SRAM_BASE_ADDR);
 863         a = priv->scd_base_addr + IWL49_SCD_CONTEXT_DATA_OFFSET;
 864         for (; a < priv->scd_base_addr + IWL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
 865                 iwl_write_targ_mem(priv, a, 0);
 866         for (; a < priv->scd_base_addr + IWL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
 867                 iwl_write_targ_mem(priv, a, 0);
 868         for (; a < sizeof(u16) * priv->hw_params.max_txq_num; a += 4)
 869                 iwl_write_targ_mem(priv, a, 0);
 870
 871         /* Tel 4965 where to find Tx byte count tables */
 872         iwl_write_prph(priv, IWL49_SCD_DRAM_BASE_ADDR,
 873                 (priv->shared_phys +
 874                  offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
 875
 876         /* Disable chain mode for all queues */
 877         iwl_write_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, 0);
 878
 879         /* Initialize each Tx queue (including the command queue) */
 880         for (i = 0; i < priv->hw_params.max_txq_num; i++) {
 881
 882                 /* TFD circular buffer read/write indexes */
 883                 iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(i), 0);
 884                 iwl_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
 885
 886                 /* Max Tx Window size for Scheduler-ACK mode */
 887                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 888                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i),
 889                                 (SCD_WIN_SIZE <<
 890                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
 891                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
 892
 893                 /* Frame limit */
 894                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 895                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
 896                                 sizeof(u32),
 897                                 (SCD_FRAME_LIMIT <<
 898                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
 899                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
 900
 901         }
 902         iwl_write_prph(priv, IWL49_SCD_INTERRUPT_MASK,
 903                                  (1 << priv->hw_params.max_txq_num) - 1);
 904
 905         /* Activate all Tx DMA/FIFO channels */
 906         priv->cfg->ops->lib->txq_set_sched(priv, IWL_MASK(0, 7));
 907
 908         iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
 909
 910         /* Map each Tx/cmd queue to its corresponding fifo */
 911         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
 912                 int ac = default_queue_to_tx_fifo[i];
 913                 iwl_txq_ctx_activate(priv, i);
 914                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
 915         }
 916
 917         iwl_release_nic_access(priv);
 918         spin_unlock_irqrestore(&priv->lock, flags);
 919
 920         return ret;
 921 }
 922
 923 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
 924 static struct iwl_sensitivity_ranges iwl4965_sensitivity = {
 925         .min_nrg_cck = 97,
 926         .max_nrg_cck = 0,
 927
 928         .auto_corr_min_ofdm = 85,
 929         .auto_corr_min_ofdm_mrc = 170,
 930         .auto_corr_min_ofdm_x1 = 105,
 931         .auto_corr_min_ofdm_mrc_x1 = 220,
 932
 933         .auto_corr_max_ofdm = 120,
 934         .auto_corr_max_ofdm_mrc = 210,
 935         .auto_corr_max_ofdm_x1 = 140,
 936         .auto_corr_max_ofdm_mrc_x1 = 270,
 937
 938         .auto_corr_min_cck = 125,
 939         .auto_corr_max_cck = 200,
 940         .auto_corr_min_cck_mrc = 200,
 941         .auto_corr_max_cck_mrc = 400,
 942
 943         .nrg_th_cck = 100,
 944         .nrg_th_ofdm = 100,
 945 };
 946 #endif
 947
 948 /**
 949  * iwl4965_hw_set_hw_params
 950  *
 951  * Called when initializing driver
 952  */
 953 int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
 954 {
 955
 956         if ((priv->cfg->mod_params->num_of_queues > IWL49_NUM_QUEUES) ||
 957             (priv->cfg->mod_params->num_of_queues < IWL_MIN_NUM_QUEUES)) {
 958                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
 959                           IWL_MIN_NUM_QUEUES, IWL49_NUM_QUEUES);
 960                 return -EINVAL;
 961         }
 962
 963         priv->hw_params.max_txq_num = priv->cfg->mod_params->num_of_queues;
 964         priv->hw_params.sw_crypto = priv->cfg->mod_params->sw_crypto;
 965         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
 966         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
 967         if (priv->cfg->mod_params->amsdu_size_8K)
 968                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
 969         else
 970                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
 971         priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
 972         priv->hw_params.max_stations = IWL4965_STATION_COUNT;
 973         priv->hw_params.bcast_sta_id = IWL4965_BROADCAST_ID;
 974
 975         priv->hw_params.max_data_size = IWL49_RTC_DATA_SIZE;
 976         priv->hw_params.max_inst_size = IWL49_RTC_INST_SIZE;
 977         priv->hw_params.max_bsm_size = BSM_SRAM_SIZE;
 978         priv->hw_params.fat_channel = BIT(IEEE80211_BAND_5GHZ);
 979
 980         priv->hw_params.tx_chains_num = 2;
 981         priv->hw_params.rx_chains_num = 2;
 982         priv->hw_params.valid_tx_ant = ANT_A | ANT_B;
 983         priv->hw_params.valid_rx_ant = ANT_A | ANT_B;
 984         priv->hw_params.ct_kill_threshold = CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD);
 985
 986 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
 987         priv->hw_params.sens = &iwl4965_sensitivity;
 988 #endif
 989
 990         return 0;
 991 }
 992
 993 /* set card power command */
 994 static int iwl4965_set_power(struct iwl_priv *priv,
 995                       void *cmd)
 996 {
 997         int ret = 0;
 998
 999         ret = iwl_send_cmd_pdu_async(priv, POWER_TABLE_CMD,
1000                                     sizeof(struct iwl4965_powertable_cmd),
1001                                     cmd, NULL);
1002         return ret;
1003 }
1004 int iwl4965_hw_reg_set_txpower(struct iwl_priv *priv, s8 power)
1005 {
1006         IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
1007         return -EINVAL;
1008 }
1009
1010 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
1011 {
1012         s32 sign = 1;
1013
1014         if (num < 0) {
1015                 sign = -sign;
1016                 num = -num;
1017         }
1018         if (denom < 0) {
1019                 sign = -sign;
1020                 denom = -denom;
1021         }
1022         *res = 1;
1023         *res = ((num * 2 + denom) / (denom * 2)) * sign;
1024
1025         return 1;
1026 }
1027
1028 /**
1029  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
1030  *
1031  * Determines power supply voltage compensation for txpower calculations.
1032  * Returns number of 1/2-dB steps to subtract from gain table index,
1033  * to compensate for difference between power supply voltage during
1034  * factory measurements, vs. current power supply voltage.
1035  *
1036  * Voltage indication is higher for lower voltage.
1037  * Lower voltage requires more gain (lower gain table index).
1038  */
1039 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
1040                                             s32 current_voltage)
1041 {
1042         s32 comp = 0;
1043
1044         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
1045             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
1046                 return 0;
1047
1048         iwl4965_math_div_round(current_voltage - eeprom_voltage,
1049                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
1050
1051         if (current_voltage > eeprom_voltage)
1052                 comp *= 2;
1053         if ((comp < -2) || (comp > 2))
1054                 comp = 0;
1055
1056         return comp;
1057 }
1058
1059 static const struct iwl_channel_info *
1060 iwl4965_get_channel_txpower_info(struct iwl_priv *priv,
1061                                  enum ieee80211_band band, u16 channel)
1062 {
1063         const struct iwl_channel_info *ch_info;
1064
1065         ch_info = iwl_get_channel_info(priv, band, channel);
1066
1067         if (!is_channel_valid(ch_info))
1068                 return NULL;
1069
1070         return ch_info;
1071 }
1072
1073 static s32 iwl4965_get_tx_atten_grp(u16 channel)
1074 {
1075         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
1076             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
1077                 return CALIB_CH_GROUP_5;
1078
1079         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
1080             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
1081                 return CALIB_CH_GROUP_1;
1082
1083         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
1084             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
1085                 return CALIB_CH_GROUP_2;
1086
1087         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
1088             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
1089                 return CALIB_CH_GROUP_3;
1090
1091         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
1092             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
1093                 return CALIB_CH_GROUP_4;
1094
1095         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
1096         return -1;
1097 }
1098
1099 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
1100 {
1101         s32 b = -1;
1102
1103         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
1104                 if (priv->calib_info->band_info[b].ch_from == 0)
1105                         continue;
1106
1107                 if ((channel >= priv->calib_info->band_info[b].ch_from)
1108                     && (channel <= priv->calib_info->band_info[b].ch_to))
1109                         break;
1110         }
1111
1112         return b;
1113 }
1114
1115 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
1116 {
1117         s32 val;
1118
1119         if (x2 == x1)
1120                 return y1;
1121         else {
1122                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
1123                 return val + y2;
1124         }
1125 }
1126
1127 /**
1128  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
1129  *
1130  * Interpolates factory measurements from the two sample channels within a
1131  * sub-band, to apply to channel of interest.  Interpolation is proportional to
1132  * differences in channel frequencies, which is proportional to differences
1133  * in channel number.
1134  */
1135 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
1136                                     struct iwl_eeprom_calib_ch_info *chan_info)
1137 {
1138         s32 s = -1;
1139         u32 c;
1140         u32 m;
1141         const struct iwl_eeprom_calib_measure *m1;
1142         const struct iwl_eeprom_calib_measure *m2;
1143         struct iwl_eeprom_calib_measure *omeas;
1144         u32 ch_i1;
1145         u32 ch_i2;
1146
1147         s = iwl4965_get_sub_band(priv, channel);
1148         if (s >= EEPROM_TX_POWER_BANDS) {
1149                 IWL_ERROR("Tx Power can not find channel %d ", channel);
1150                 return -1;
1151         }
1152
1153         ch_i1 = priv->calib_info->band_info[s].ch1.ch_num;
1154         ch_i2 = priv->calib_info->band_info[s].ch2.ch_num;
1155         chan_info->ch_num = (u8) channel;
1156
1157         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
1158                           channel, s, ch_i1, ch_i2);
1159
1160         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
1161                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
1162                         m1 = &(priv->calib_info->band_info[s].ch1.
1163                                measurements[c][m]);
1164                         m2 = &(priv->calib_info->band_info[s].ch2.
1165                                measurements[c][m]);
1166                         omeas = &(chan_info->measurements[c][m]);
1167
1168                         omeas->actual_pow =
1169                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1170                                                            m1->actual_pow,
1171                                                            ch_i2,
1172                                                            m2->actual_pow);
1173                         omeas->gain_idx =
1174                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1175                                                            m1->gain_idx, ch_i2,
1176                                                            m2->gain_idx);
1177                         omeas->temperature =
1178                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1179                                                            m1->temperature,
1180                                                            ch_i2,
1181                                                            m2->temperature);
1182                         omeas->pa_det =
1183                             (s8) iwl4965_interpolate_value(channel, ch_i1,
1184                                                            m1->pa_det, ch_i2,
1185                                                            m2->pa_det);
1186
1187                         IWL_DEBUG_TXPOWER
1188                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
1189                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
1190                         IWL_DEBUG_TXPOWER
1191                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
1192                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
1193                         IWL_DEBUG_TXPOWER
1194                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
1195                              m1->pa_det, m2->pa_det, omeas->pa_det);
1196                         IWL_DEBUG_TXPOWER
1197                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
1198                              m1->temperature, m2->temperature,
1199                              omeas->temperature);
1200                 }
1201         }
1202
1203         return 0;
1204 }
1205
1206 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
1207  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
1208 static s32 back_off_table[] = {
1209         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
1210         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
1211         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
1212         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
1213         10                      /* CCK */
1214 };
1215
1216 /* Thermal compensation values for txpower for various frequency ranges ...
1217  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
1218 static struct iwl4965_txpower_comp_entry {
1219         s32 degrees_per_05db_a;
1220         s32 degrees_per_05db_a_denom;
1221 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
1222         {9, 2},                 /* group 0 5.2, ch  34-43 */
1223         {4, 1},                 /* group 1 5.2, ch  44-70 */
1224         {4, 1},                 /* group 2 5.2, ch  71-124 */
1225         {4, 1},                 /* group 3 5.2, ch 125-200 */
1226         {3, 1}                  /* group 4 2.4, ch   all */
1227 };
1228
1229 static s32 get_min_power_index(s32 rate_power_index, u32 band)
1230 {
1231         if (!band) {
1232                 if ((rate_power_index & 7) <= 4)
1233                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
1234         }
1235         return MIN_TX_GAIN_INDEX;
1236 }
1237
1238 struct gain_entry {
1239         u8 dsp;
1240         u8 radio;
1241 };
1242
1243 static const struct gain_entry gain_table[2][108] = {
1244         /* 5.2GHz power gain index table */
1245         {
1246          {123, 0x3F},           /* highest txpower */
1247          {117, 0x3F},
1248          {110, 0x3F},
1249          {104, 0x3F},
1250          {98, 0x3F},
1251          {110, 0x3E},
1252          {104, 0x3E},
1253          {98, 0x3E},
1254          {110, 0x3D},
1255          {104, 0x3D},
1256          {98, 0x3D},
1257          {110, 0x3C},
1258          {104, 0x3C},
1259          {98, 0x3C},
1260          {110, 0x3B},
1261          {104, 0x3B},
1262          {98, 0x3B},
1263          {110, 0x3A},
1264          {104, 0x3A},
1265          {98, 0x3A},
1266          {110, 0x39},
1267          {104, 0x39},
1268          {98, 0x39},
1269          {110, 0x38},
1270          {104, 0x38},
1271          {98, 0x38},
1272          {110, 0x37},
1273          {104, 0x37},
1274          {98, 0x37},
1275          {110, 0x36},
1276          {104, 0x36},
1277          {98, 0x36},
1278          {110, 0x35},
1279          {104, 0x35},
1280          {98, 0x35},
1281          {110, 0x34},
1282          {104, 0x34},
1283          {98, 0x34},
1284          {110, 0x33},
1285          {104, 0x33},
1286          {98, 0x33},
1287          {110, 0x32},
1288          {104, 0x32},
1289          {98, 0x32},
1290          {110, 0x31},
1291          {104, 0x31},
1292          {98, 0x31},
1293          {110, 0x30},
1294          {104, 0x30},
1295          {98, 0x30},
1296          {110, 0x25},
1297          {104, 0x25},
1298          {98, 0x25},
1299          {110, 0x24},
1300          {104, 0x24},
1301          {98, 0x24},
1302          {110, 0x23},
1303          {104, 0x23},
1304          {98, 0x23},
1305          {110, 0x22},
1306          {104, 0x18},
1307          {98, 0x18},
1308          {110, 0x17},
1309          {104, 0x17},
1310          {98, 0x17},
1311          {110, 0x16},
1312          {104, 0x16},
1313          {98, 0x16},
1314          {110, 0x15},
1315          {104, 0x15},
1316          {98, 0x15},
1317          {110, 0x14},
1318          {104, 0x14},
1319          {98, 0x14},
1320          {110, 0x13},
1321          {104, 0x13},
1322          {98, 0x13},
1323          {110, 0x12},
1324          {104, 0x08},
1325          {98, 0x08},
1326          {110, 0x07},
1327          {104, 0x07},
1328          {98, 0x07},
1329          {110, 0x06},
1330          {104, 0x06},
1331          {98, 0x06},
1332          {110, 0x05},
1333          {104, 0x05},
1334          {98, 0x05},
1335          {110, 0x04},
1336          {104, 0x04},
1337          {98, 0x04},
1338          {110, 0x03},
1339          {104, 0x03},
1340          {98, 0x03},
1341          {110, 0x02},
1342          {104, 0x02},
1343          {98, 0x02},
1344          {110, 0x01},
1345          {104, 0x01},
1346          {98, 0x01},
1347          {110, 0x00},
1348          {104, 0x00},
1349          {98, 0x00},
1350          {93, 0x00},
1351          {88, 0x00},
1352          {83, 0x00},
1353          {78, 0x00},
1354          },
1355         /* 2.4GHz power gain index table */
1356         {
1357          {110, 0x3f},           /* highest txpower */
1358          {104, 0x3f},
1359          {98, 0x3f},
1360          {110, 0x3e},
1361          {104, 0x3e},
1362          {98, 0x3e},
1363          {110, 0x3d},
1364          {104, 0x3d},
1365          {98, 0x3d},
1366          {110, 0x3c},
1367          {104, 0x3c},
1368          {98, 0x3c},
1369          {110, 0x3b},
1370          {104, 0x3b},
1371          {98, 0x3b},
1372          {110, 0x3a},
1373          {104, 0x3a},
1374          {98, 0x3a},
1375          {110, 0x39},
1376          {104, 0x39},
1377          {98, 0x39},
1378          {110, 0x38},
1379          {104, 0x38},
1380          {98, 0x38},
1381          {110, 0x37},
1382          {104, 0x37},
1383          {98, 0x37},
1384          {110, 0x36},
1385          {104, 0x36},
1386          {98, 0x36},
1387          {110, 0x35},
1388          {104, 0x35},
1389          {98, 0x35},
1390          {110, 0x34},
1391          {104, 0x34},
1392          {98, 0x34},
1393          {110, 0x33},
1394          {104, 0x33},
1395          {98, 0x33},
1396          {110, 0x32},
1397          {104, 0x32},
1398          {98, 0x32},
1399          {110, 0x31},
1400          {104, 0x31},
1401          {98, 0x31},
1402          {110, 0x30},
1403          {104, 0x30},
1404          {98, 0x30},
1405          {110, 0x6},
1406          {104, 0x6},
1407          {98, 0x6},
1408          {110, 0x5},
1409          {104, 0x5},
1410          {98, 0x5},
1411          {110, 0x4},
1412          {104, 0x4},
1413          {98, 0x4},
1414          {110, 0x3},
1415          {104, 0x3},
1416          {98, 0x3},
1417          {110, 0x2},
1418          {104, 0x2},
1419          {98, 0x2},
1420          {110, 0x1},
1421          {104, 0x1},
1422          {98, 0x1},
1423          {110, 0x0},
1424          {104, 0x0},
1425          {98, 0x0},
1426          {97, 0},
1427          {96, 0},
1428          {95, 0},
1429          {94, 0},
1430          {93, 0},
1431          {92, 0},
1432          {91, 0},
1433          {90, 0},
1434          {89, 0},
1435          {88, 0},
1436          {87, 0},
1437          {86, 0},
1438          {85, 0},
1439          {84, 0},
1440          {83, 0},
1441          {82, 0},
1442          {81, 0},
1443          {80, 0},
1444          {79, 0},
1445          {78, 0},
1446          {77, 0},
1447          {76, 0},
1448          {75, 0},
1449          {74, 0},
1450          {73, 0},
1451          {72, 0},
1452          {71, 0},
1453          {70, 0},
1454          {69, 0},
1455          {68, 0},
1456          {67, 0},
1457          {66, 0},
1458          {65, 0},
1459          {64, 0},
1460          {63, 0},
1461          {62, 0},
1462          {61, 0},
1463          {60, 0},
1464          {59, 0},
1465          }
1466 };
1467
1468 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
1469                                     u8 is_fat, u8 ctrl_chan_high,
1470                                     struct iwl4965_tx_power_db *tx_power_tbl)
1471 {
1472         u8 saturation_power;
1473         s32 target_power;
1474         s32 user_target_power;
1475         s32 power_limit;
1476         s32 current_temp;
1477         s32 reg_limit;
1478         s32 current_regulatory;
1479         s32 txatten_grp = CALIB_CH_GROUP_MAX;
1480         int i;
1481         int c;
1482         const struct iwl_channel_info *ch_info = NULL;
1483         struct iwl_eeprom_calib_ch_info ch_eeprom_info;
1484         const struct iwl_eeprom_calib_measure *measurement;
1485         s16 voltage;
1486         s32 init_voltage;
1487         s32 voltage_compensation;
1488         s32 degrees_per_05db_num;
1489         s32 degrees_per_05db_denom;
1490         s32 factory_temp;
1491         s32 temperature_comp[2];
1492         s32 factory_gain_index[2];
1493         s32 factory_actual_pwr[2];
1494         s32 power_index;
1495
1496         /* Sanity check requested level (dBm) */
1497         if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
1498                 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
1499                             priv->user_txpower_limit);
1500                 return -EINVAL;
1501         }
1502         if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
1503                 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
1504                             priv->user_txpower_limit);
1505                 return -EINVAL;
1506         }
1507
1508         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
1509          *   are used for indexing into txpower table) */
1510         user_target_power = 2 * priv->user_txpower_limit;
1511
1512         /* Get current (RXON) channel, band, width */
1513         ch_info =
1514                 iwl4965_get_channel_txpower_info(priv, priv->band, channel);
1515
1516         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
1517                           is_fat);
1518
1519         if (!ch_info)
1520                 return -EINVAL;
1521
1522         /* get txatten group, used to select 1) thermal txpower adjustment
1523          *   and 2) mimo txpower balance between Tx chains. */
1524         txatten_grp = iwl4965_get_tx_atten_grp(channel);
1525         if (txatten_grp < 0)
1526                 return -EINVAL;
1527
1528         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
1529                           channel, txatten_grp);
1530
1531         if (is_fat) {
1532                 if (ctrl_chan_high)
1533                         channel -= 2;
1534                 else
1535                         channel += 2;
1536         }
1537
1538         /* hardware txpower limits ...
1539          * saturation (clipping distortion) txpowers are in half-dBm */
1540         if (band)
1541                 saturation_power = priv->calib_info->saturation_power24;
1542         else
1543                 saturation_power = priv->calib_info->saturation_power52;
1544
1545         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
1546             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
1547                 if (band)
1548                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
1549                 else
1550                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
1551         }
1552
1553         /* regulatory txpower limits ... reg_limit values are in half-dBm,
1554          *   max_power_avg values are in dBm, convert * 2 */
1555         if (is_fat)
1556                 reg_limit = ch_info->fat_max_power_avg * 2;
1557         else
1558                 reg_limit = ch_info->max_power_avg * 2;
1559
1560         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
1561             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
1562                 if (band)
1563                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
1564                 else
1565                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
1566         }
1567
1568         /* Interpolate txpower calibration values for this channel,
1569          *   based on factory calibration tests on spaced channels. */
1570         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
1571
1572         /* calculate tx gain adjustment based on power supply voltage */
1573         voltage = priv->calib_info->voltage;
1574         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
1575         voltage_compensation =
1576             iwl4965_get_voltage_compensation(voltage, init_voltage);
1577
1578         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
1579                           init_voltage,
1580                           voltage, voltage_compensation);
1581
1582         /* get current temperature (Celsius) */
1583         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
1584         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
1585         current_temp = KELVIN_TO_CELSIUS(current_temp);
1586
1587         /* select thermal txpower adjustment params, based on channel group
1588          *   (same frequency group used for mimo txatten adjustment) */
1589         degrees_per_05db_num =
1590             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
1591         degrees_per_05db_denom =
1592             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
1593
1594         /* get per-chain txpower values from factory measurements */
1595         for (c = 0; c < 2; c++) {
1596                 measurement = &ch_eeprom_info.measurements[c][1];
1597
1598                 /* txgain adjustment (in half-dB steps) based on difference
1599                  *   between factory and current temperature */
1600                 factory_temp = measurement->temperature;
1601                 iwl4965_math_div_round((current_temp - factory_temp) *
1602                                        degrees_per_05db_denom,
1603                                        degrees_per_05db_num,
1604                                        &temperature_comp[c]);
1605
1606                 factory_gain_index[c] = measurement->gain_idx;
1607                 factory_actual_pwr[c] = measurement->actual_pow;
1608
1609                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
1610                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
1611                                   "curr tmp %d, comp %d steps\n",
1612                                   factory_temp, current_temp,
1613                                   temperature_comp[c]);
1614
1615                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
1616                                   factory_gain_index[c],
1617                                   factory_actual_pwr[c]);
1618         }
1619
1620         /* for each of 33 bit-rates (including 1 for CCK) */
1621         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
1622                 u8 is_mimo_rate;
1623                 union iwl4965_tx_power_dual_stream tx_power;
1624
1625                 /* for mimo, reduce each chain's txpower by half
1626                  * (3dB, 6 steps), so total output power is regulatory
1627                  * compliant. */
1628                 if (i & 0x8) {
1629                         current_regulatory = reg_limit -
1630                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
1631                         is_mimo_rate = 1;
1632                 } else {
1633                         current_regulatory = reg_limit;
1634                         is_mimo_rate = 0;
1635                 }
1636
1637                 /* find txpower limit, either hardware or regulatory */
1638                 power_limit = saturation_power - back_off_table[i];
1639                 if (power_limit > current_regulatory)
1640                         power_limit = current_regulatory;
1641
1642                 /* reduce user's txpower request if necessary
1643                  * for this rate on this channel */
1644                 target_power = user_target_power;
1645                 if (target_power > power_limit)
1646                         target_power = power_limit;
1647
1648                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
1649                                   i, saturation_power - back_off_table[i],
1650                                   current_regulatory, user_target_power,
1651                                   target_power);
1652
1653                 /* for each of 2 Tx chains (radio transmitters) */
1654                 for (c = 0; c < 2; c++) {
1655                         s32 atten_value;
1656
1657                         if (is_mimo_rate)
1658                                 atten_value =
1659                                     (s32)le32_to_cpu(priv->card_alive_init.
1660                                     tx_atten[txatten_grp][c]);
1661                         else
1662                                 atten_value = 0;
1663
1664                         /* calculate index; higher index means lower txpower */
1665                         power_index = (u8) (factory_gain_index[c] -
1666                                             (target_power -
1667                                              factory_actual_pwr[c]) -
1668                                             temperature_comp[c] -
1669                                             voltage_compensation +
1670                                             atten_value);
1671
1672 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
1673                                                 power_index); */
1674
1675                         if (power_index < get_min_power_index(i, band))
1676                                 power_index = get_min_power_index(i, band);
1677
1678                         /* adjust 5 GHz index to support negative indexes */
1679                         if (!band)
1680                                 power_index += 9;
1681
1682                         /* CCK, rate 32, reduce txpower for CCK */
1683                         if (i == POWER_TABLE_CCK_ENTRY)
1684                                 power_index +=
1685                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
1686
1687                         /* stay within the table! */
1688                         if (power_index > 107) {
1689                                 IWL_WARNING("txpower index %d > 107\n",
1690                                             power_index);
1691                                 power_index = 107;
1692                         }
1693                         if (power_index < 0) {
1694                                 IWL_WARNING("txpower index %d < 0\n",
1695                                             power_index);
1696                                 power_index = 0;
1697                         }
1698
1699                         /* fill txpower command for this rate/chain */
1700                         tx_power.s.radio_tx_gain[c] =
1701                                 gain_table[band][power_index].radio;
1702                         tx_power.s.dsp_predis_atten[c] =
1703                                 gain_table[band][power_index].dsp;
1704
1705                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
1706                                           "gain 0x%02x dsp %d\n",
1707                                           c, atten_value, power_index,
1708                                         tx_power.s.radio_tx_gain[c],
1709                                         tx_power.s.dsp_predis_atten[c]);
1710                 }/* for each chain */
1711
1712                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
1713
1714         }/* for each rate */
1715
1716         return 0;
1717 }
1718
1719 /**
1720  * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
1721  *
1722  * Uses the active RXON for channel, band, and characteristics (fat, high)
1723  * The power limit is taken from priv->user_txpower_limit.
1724  */
1725 int iwl4965_hw_reg_send_txpower(struct iwl_priv *priv)
1726 {
1727         struct iwl4965_txpowertable_cmd cmd = { 0 };
1728         int ret;
1729         u8 band = 0;
1730         u8 is_fat = 0;
1731         u8 ctrl_chan_high = 0;
1732
1733         if (test_bit(STATUS_SCANNING, &priv->status)) {
1734                 /* If this gets hit a lot, switch it to a BUG() and catch
1735                  * the stack trace to find out who is calling this during
1736                  * a scan. */
1737                 IWL_WARNING("TX Power requested while scanning!\n");
1738                 return -EAGAIN;
1739         }
1740
1741         band = priv->band == IEEE80211_BAND_2GHZ;
1742
1743         is_fat =  is_fat_channel(priv->active_rxon.flags);
1744
1745         if (is_fat &&
1746             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1747                 ctrl_chan_high = 1;
1748
1749         cmd.band = band;
1750         cmd.channel = priv->active_rxon.channel;
1751
1752         ret = iwl4965_fill_txpower_tbl(priv, band,
1753                                 le16_to_cpu(priv->active_rxon.channel),
1754                                 is_fat, ctrl_chan_high, &cmd.tx_power);
1755         if (ret)
1756                 goto out;
1757
1758         ret = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
1759
1760 out:
1761         return ret;
1762 }
1763
1764 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
1765 {
1766         int ret = 0;
1767         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1768         const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1769         const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1770
1771         if ((rxon1->flags == rxon2->flags) &&
1772             (rxon1->filter_flags == rxon2->filter_flags) &&
1773             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1774             (rxon1->ofdm_ht_single_stream_basic_rates ==
1775              rxon2->ofdm_ht_single_stream_basic_rates) &&
1776             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1777              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1778             (rxon1->rx_chain == rxon2->rx_chain) &&
1779             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1780                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1781                 return 0;
1782         }
1783
1784         rxon_assoc.flags = priv->staging_rxon.flags;
1785         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1786         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1787         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1788         rxon_assoc.reserved = 0;
1789         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1790             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1791         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1792             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1793         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1794
1795         ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
1796                                      sizeof(rxon_assoc), &rxon_assoc, NULL);
1797         if (ret)
1798                 return ret;
1799
1800         return ret;
1801 }
1802
1803
1804 int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
1805 {
1806         int rc;
1807         u8 band = 0;
1808         u8 is_fat = 0;
1809         u8 ctrl_chan_high = 0;
1810         struct iwl4965_channel_switch_cmd cmd = { 0 };
1811         const struct iwl_channel_info *ch_info;
1812
1813         band = priv->band == IEEE80211_BAND_2GHZ;
1814
1815         ch_info = iwl_get_channel_info(priv, priv->band, channel);
1816
1817         is_fat = is_fat_channel(priv->staging_rxon.flags);
1818
1819         if (is_fat &&
1820             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1821                 ctrl_chan_high = 1;
1822
1823         cmd.band = band;
1824         cmd.expect_beacon = 0;
1825         cmd.channel = cpu_to_le16(channel);
1826         cmd.rxon_flags = priv->active_rxon.flags;
1827         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
1828         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
1829         if (ch_info)
1830                 cmd.expect_beacon = is_channel_radar(ch_info);
1831         else
1832                 cmd.expect_beacon = 1;
1833
1834         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
1835                                       ctrl_chan_high, &cmd.tx_power);
1836         if (rc) {
1837                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
1838                 return rc;
1839         }
1840
1841         rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
1842         return rc;
1843 }
1844
1845 static int iwl4965_shared_mem_rx_idx(struct iwl_priv *priv)
1846 {
1847         struct iwl4965_shared *s = priv->shared_virt;
1848         return le32_to_cpu(s->rb_closed) & 0xFFF;
1849 }
1850
1851 int iwl4965_hw_get_temperature(struct iwl_priv *priv)
1852 {
1853         return priv->temperature;
1854 }
1855
1856 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl_priv *priv,
1857                           struct iwl_frame *frame, u8 rate)
1858 {
1859         struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
1860         unsigned int frame_size;
1861
1862         tx_beacon_cmd = &frame->u.beacon;
1863         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
1864
1865         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
1866         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1867
1868         frame_size = iwl4965_fill_beacon_frame(priv,
1869                                 tx_beacon_cmd->frame,
1870                                 iwl_bcast_addr,
1871                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
1872
1873         BUG_ON(frame_size > MAX_MPDU_SIZE);
1874         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
1875
1876         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
1877                 tx_beacon_cmd->tx.rate_n_flags =
1878                         iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
1879         else
1880                 tx_beacon_cmd->tx.rate_n_flags =
1881                         iwl4965_hw_set_rate_n_flags(rate, 0);
1882
1883         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
1884                                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
1885         return (sizeof(*tx_beacon_cmd) + frame_size);
1886 }
1887
1888 static int iwl4965_alloc_shared_mem(struct iwl_priv *priv)
1889 {
1890         priv->shared_virt = pci_alloc_consistent(priv->pci_dev,
1891                                         sizeof(struct iwl4965_shared),
1892                                         &priv->shared_phys);
1893         if (!priv->shared_virt)
1894                 return -ENOMEM;
1895
1896         memset(priv->shared_virt, 0, sizeof(struct iwl4965_shared));
1897
1898         priv->rb_closed_offset = offsetof(struct iwl4965_shared, rb_closed);
1899
1900         return 0;
1901 }
1902
1903 static void iwl4965_free_shared_mem(struct iwl_priv *priv)
1904 {
1905         if (priv->shared_virt)
1906                 pci_free_consistent(priv->pci_dev,
1907                                     sizeof(struct iwl4965_shared),
1908                                     priv->shared_virt,
1909                                     priv->shared_phys);
1910 }
1911
1912 /**
1913  * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
1914  */
1915 static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
1916                                             struct iwl_tx_queue *txq,
1917                                             u16 byte_cnt)
1918 {
1919         int len;
1920         int txq_id = txq->q.id;
1921         struct iwl4965_shared *shared_data = priv->shared_virt;
1922
1923         len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
1924
1925         /* Set up byte count within first 256 entries */
1926         IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
1927                        tfd_offset[txq->q.write_ptr], byte_cnt, len);
1928
1929         /* If within first 64 entries, duplicate at end */
1930         if (txq->q.write_ptr < IWL49_MAX_WIN_SIZE)
1931                 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
1932                         tfd_offset[IWL49_QUEUE_SIZE + txq->q.write_ptr],
1933                         byte_cnt, len);
1934 }
1935
1936 /**
1937  * sign_extend - Sign extend a value using specified bit as sign-bit
1938  *
1939  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
1940  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
1941  *
1942  * @param oper value to sign extend
1943  * @param index 0 based bit index (0<=index<32) to sign bit
1944  */
1945 static s32 sign_extend(u32 oper, int index)
1946 {
1947         u8 shift = 31 - index;
1948
1949         return (s32)(oper << shift) >> shift;
1950 }
1951
1952 /**
1953  * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
1954  * @statistics: Provides the temperature reading from the uCode
1955  *
1956  * A return of <0 indicates bogus data in the statistics
1957  */
1958 int iwl4965_get_temperature(const struct iwl_priv *priv)
1959 {
1960         s32 temperature;
1961         s32 vt;
1962         s32 R1, R2, R3;
1963         u32 R4;
1964
1965         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
1966                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
1967                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
1968                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
1969                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
1970                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
1971                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
1972         } else {
1973                 IWL_DEBUG_TEMP("Running temperature calibration\n");
1974                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
1975                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
1976                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
1977                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
1978         }
1979
1980         /*
1981          * Temperature is only 23 bits, so sign extend out to 32.
1982          *
1983          * NOTE If we haven't received a statistics notification yet
1984          * with an updated temperature, use R4 provided to us in the
1985          * "initialize" ALIVE response.
1986          */
1987         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
1988                 vt = sign_extend(R4, 23);
1989         else
1990                 vt = sign_extend(
1991                         le32_to_cpu(priv->statistics.general.temperature), 23);
1992
1993         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
1994                        R1, R2, R3, vt);
1995
1996         if (R3 == R1) {
1997                 IWL_ERROR("Calibration conflict R1 == R3\n");
1998                 return -1;
1999         }
2000
2001         /* Calculate temperature in degrees Kelvin, adjust by 97%.
2002          * Add offset to center the adjustment around 0 degrees Centigrade. */
2003         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
2004         temperature /= (R3 - R1);
2005         temperature = (temperature * 97) / 100 +
2006             TEMPERATURE_CALIB_KELVIN_OFFSET;
2007
2008         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
2009             KELVIN_TO_CELSIUS(temperature));
2010
2011         return temperature;
2012 }
2013
2014 /* Adjust Txpower only if temperature variance is greater than threshold. */
2015 #define IWL_TEMPERATURE_THRESHOLD   3
2016
2017 /**
2018  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
2019  *
2020  * If the temperature changed has changed sufficiently, then a recalibration
2021  * is needed.
2022  *
2023  * Assumes caller will replace priv->last_temperature once calibration
2024  * executed.
2025  */
2026 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
2027 {
2028         int temp_diff;
2029
2030         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
2031                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
2032                 return 0;
2033         }
2034
2035         temp_diff = priv->temperature - priv->last_temperature;
2036
2037         /* get absolute value */
2038         if (temp_diff < 0) {
2039                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
2040                 temp_diff = -temp_diff;
2041         } else if (temp_diff == 0)
2042                 IWL_DEBUG_POWER("Same temp, \n");
2043         else
2044                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
2045
2046         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
2047                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
2048                 return 0;
2049         }
2050
2051         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
2052
2053         return 1;
2054 }
2055
2056 /* Calculate noise level, based on measurements during network silence just
2057  *   before arriving beacon.  This measurement can be done only if we know
2058  *   exactly when to expect beacons, therefore only when we're associated. */
2059 static void iwl4965_rx_calc_noise(struct iwl_priv *priv)
2060 {
2061         struct statistics_rx_non_phy *rx_info
2062                                 = &(priv->statistics.rx.general);
2063         int num_active_rx = 0;
2064         int total_silence = 0;
2065         int bcn_silence_a =
2066                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
2067         int bcn_silence_b =
2068                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
2069         int bcn_silence_c =
2070                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
2071
2072         if (bcn_silence_a) {
2073                 total_silence += bcn_silence_a;
2074                 num_active_rx++;
2075         }
2076         if (bcn_silence_b) {
2077                 total_silence += bcn_silence_b;
2078                 num_active_rx++;
2079         }
2080         if (bcn_silence_c) {
2081                 total_silence += bcn_silence_c;
2082                 num_active_rx++;
2083         }
2084
2085         /* Average among active antennas */
2086         if (num_active_rx)
2087                 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
2088         else
2089                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
2090
2091         IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
2092                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
2093                         priv->last_rx_noise);
2094 }
2095
2096 void iwl4965_hw_rx_statistics(struct iwl_priv *priv,
2097                               struct iwl_rx_mem_buffer *rxb)
2098 {
2099         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2100         int change;
2101         s32 temp;
2102
2103         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
2104                      (int)sizeof(priv->statistics), pkt->len);
2105
2106         change = ((priv->statistics.general.temperature !=
2107                    pkt->u.stats.general.temperature) ||
2108                   ((priv->statistics.flag &
2109                     STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
2110                    (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
2111
2112         memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
2113
2114         set_bit(STATUS_STATISTICS, &priv->status);
2115
2116         /* Reschedule the statistics timer to occur in
2117          * REG_RECALIB_PERIOD seconds to ensure we get a
2118          * thermal update even if the uCode doesn't give
2119          * us one */
2120         mod_timer(&priv->statistics_periodic, jiffies +
2121                   msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
2122
2123         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
2124             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
2125                 iwl4965_rx_calc_noise(priv);
2126 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
2127                 queue_work(priv->workqueue, &priv->sensitivity_work);
2128 #endif
2129         }
2130
2131         iwl_leds_background(priv);
2132
2133         /* If the hardware hasn't reported a change in
2134          * temperature then don't bother computing a
2135          * calibrated temperature value */
2136         if (!change)
2137                 return;
2138
2139         temp = iwl4965_get_temperature(priv);
2140         if (temp < 0)
2141                 return;
2142
2143         if (priv->temperature != temp) {
2144                 if (priv->temperature)
2145                         IWL_DEBUG_TEMP("Temperature changed "
2146                                        "from %dC to %dC\n",
2147                                        KELVIN_TO_CELSIUS(priv->temperature),
2148                                        KELVIN_TO_CELSIUS(temp));
2149                 else
2150                         IWL_DEBUG_TEMP("Temperature "
2151                                        "initialized to %dC\n",
2152                                        KELVIN_TO_CELSIUS(temp));
2153         }
2154
2155         priv->temperature = temp;
2156         set_bit(STATUS_TEMPERATURE, &priv->status);
2157
2158         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
2159                      iwl4965_is_temp_calib_needed(priv))
2160                 queue_work(priv->workqueue, &priv->txpower_work);
2161 }
2162
2163 static void iwl4965_add_radiotap(struct iwl_priv *priv,
2164                                  struct sk_buff *skb,
2165                                  struct iwl4965_rx_phy_res *rx_start,
2166                                  struct ieee80211_rx_status *stats,
2167                                  u32 ampdu_status)
2168 {
2169         s8 signal = stats->signal;
2170         s8 noise = 0;
2171         int rate = stats->rate_idx;
2172         u64 tsf = stats->mactime;
2173         __le16 antenna;
2174         __le16 phy_flags_hw = rx_start->phy_flags;
2175         struct iwl4965_rt_rx_hdr {
2176                 struct ieee80211_radiotap_header rt_hdr;
2177                 __le64 rt_tsf;          /* TSF */
2178                 u8 rt_flags;            /* radiotap packet flags */
2179                 u8 rt_rate;             /* rate in 500kb/s */
2180                 __le16 rt_channelMHz;   /* channel in MHz */
2181                 __le16 rt_chbitmask;    /* channel bitfield */
2182                 s8 rt_dbmsignal;        /* signal in dBm, kluged to signed */
2183                 s8 rt_dbmnoise;
2184                 u8 rt_antenna;          /* antenna number */
2185         } __attribute__ ((packed)) *iwl4965_rt;
2186
2187         /* TODO: We won't have enough headroom for HT frames. Fix it later. */
2188         if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
2189                 if (net_ratelimit())
2190                         printk(KERN_ERR "not enough headroom [%d] for "
2191                                "radiotap head [%zd]\n",
2192                                skb_headroom(skb), sizeof(*iwl4965_rt));
2193                 return;
2194         }
2195
2196         /* put radiotap header in front of 802.11 header and data */
2197         iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
2198
2199         /* initialise radiotap header */
2200         iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
2201         iwl4965_rt->rt_hdr.it_pad = 0;
2202
2203         /* total header + data */
2204         put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
2205                       &iwl4965_rt->rt_hdr.it_len);
2206
2207         /* Indicate all the fields we add to the radiotap header */
2208         put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
2209                                   (1 << IEEE80211_RADIOTAP_FLAGS) |
2210                                   (1 << IEEE80211_RADIOTAP_RATE) |
2211                                   (1 << IEEE80211_RADIOTAP_CHANNEL) |
2212                                   (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
2213                                   (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
2214                                   (1 << IEEE80211_RADIOTAP_ANTENNA)),
2215                       &iwl4965_rt->rt_hdr.it_present);
2216
2217         /* Zero the flags, we'll add to them as we go */
2218         iwl4965_rt->rt_flags = 0;
2219
2220         put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
2221
2222         iwl4965_rt->rt_dbmsignal = signal;
2223         iwl4965_rt->rt_dbmnoise = noise;
2224
2225         /* Convert the channel frequency and set the flags */
2226         put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
2227         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
2228                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
2229                                           IEEE80211_CHAN_5GHZ),
2230                               &iwl4965_rt->rt_chbitmask);
2231         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
2232                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
2233                                           IEEE80211_CHAN_2GHZ),
2234                               &iwl4965_rt->rt_chbitmask);
2235         else    /* 802.11g */
2236                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
2237                                           IEEE80211_CHAN_2GHZ),
2238                               &iwl4965_rt->rt_chbitmask);
2239
2240         if (rate == -1)
2241                 iwl4965_rt->rt_rate = 0;
2242         else
2243                 iwl4965_rt->rt_rate = iwl_rates[rate].ieee;
2244
2245         /*
2246          * "antenna number"
2247          *
2248          * It seems that the antenna field in the phy flags value
2249          * is actually a bitfield. This is undefined by radiotap,
2250          * it wants an actual antenna number but I always get "7"
2251          * for most legacy frames I receive indicating that the
2252          * same frame was received on all three RX chains.
2253          *
2254          * I think this field should be removed in favour of a
2255          * new 802.11n radiotap field "RX chains" that is defined
2256          * as a bitmask.
2257          */
2258         antenna = phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK;
2259         iwl4965_rt->rt_antenna = le16_to_cpu(antenna) >> 4;
2260
2261         /* set the preamble flag if appropriate */
2262         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
2263                 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
2264
2265         stats->flag |= RX_FLAG_RADIOTAP;
2266 }
2267
2268 static void iwl_update_rx_stats(struct iwl_priv *priv, u16 fc, u16 len)
2269 {
2270         /* 0 - mgmt, 1 - cnt, 2 - data */
2271         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
2272         priv->rx_stats[idx].cnt++;
2273         priv->rx_stats[idx].bytes += len;
2274 }
2275
2276 /*
2277  * returns non-zero if packet should be dropped
2278  */
2279 static int iwl4965_set_decrypted_flag(struct iwl_priv *priv,
2280                                       struct ieee80211_hdr *hdr,
2281                                       u32 decrypt_res,
2282                                       struct ieee80211_rx_status *stats)
2283 {
2284         u16 fc = le16_to_cpu(hdr->frame_control);
2285
2286         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2287                 return 0;
2288
2289         if (!(fc & IEEE80211_FCTL_PROTECTED))
2290                 return 0;
2291
2292         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2293         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2294         case RX_RES_STATUS_SEC_TYPE_TKIP:
2295                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2296                  * Decryption will be done in SW. */
2297                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2298                     RX_RES_STATUS_BAD_KEY_TTAK)
2299                         break;
2300
2301         case RX_RES_STATUS_SEC_TYPE_WEP:
2302                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2303                     RX_RES_STATUS_BAD_ICV_MIC) {
2304                         /* bad ICV, the packet is destroyed since the
2305                          * decryption is inplace, drop it */
2306                         IWL_DEBUG_RX("Packet destroyed\n");
2307                         return -1;
2308                 }
2309         case RX_RES_STATUS_SEC_TYPE_CCMP:
2310                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2311                     RX_RES_STATUS_DECRYPT_OK) {
2312                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2313                         stats->flag |= RX_FLAG_DECRYPTED;
2314                 }
2315                 break;
2316
2317         default:
2318                 break;
2319         }
2320         return 0;
2321 }
2322
2323 static u32 iwl4965_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
2324 {
2325         u32 decrypt_out = 0;
2326
2327         if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
2328                                         RX_RES_STATUS_STATION_FOUND)
2329                 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
2330                                 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
2331
2332         decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
2333
2334         /* packet was not encrypted */
2335         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
2336                                         RX_RES_STATUS_SEC_TYPE_NONE)
2337                 return decrypt_out;
2338
2339         /* packet was encrypted with unknown alg */
2340         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
2341                                         RX_RES_STATUS_SEC_TYPE_ERR)
2342                 return decrypt_out;
2343
2344         /* decryption was not done in HW */
2345         if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
2346                                         RX_MPDU_RES_STATUS_DEC_DONE_MSK)
2347                 return decrypt_out;
2348
2349         switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
2350
2351         case RX_RES_STATUS_SEC_TYPE_CCMP:
2352                 /* alg is CCM: check MIC only */
2353                 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
2354                         /* Bad MIC */
2355                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
2356                 else
2357                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
2358
2359                 break;
2360
2361         case RX_RES_STATUS_SEC_TYPE_TKIP:
2362                 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
2363                         /* Bad TTAK */
2364                         decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
2365                         break;
2366                 }
2367                 /* fall through if TTAK OK */
2368         default:
2369                 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
2370                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
2371                 else
2372                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
2373                 break;
2374         };
2375
2376         IWL_DEBUG_RX("decrypt_in:0x%x  decrypt_out = 0x%x\n",
2377                                         decrypt_in, decrypt_out);
2378
2379         return decrypt_out;
2380 }
2381
2382 static void iwl4965_handle_data_packet(struct iwl_priv *priv, int is_data,
2383                                        int include_phy,
2384                                        struct iwl_rx_mem_buffer *rxb,
2385                                        struct ieee80211_rx_status *stats)
2386 {
2387         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2388         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
2389             (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
2390         struct ieee80211_hdr *hdr;
2391         u16 len;
2392         __le32 *rx_end;
2393         unsigned int skblen;
2394         u32 ampdu_status;
2395         u32 ampdu_status_legacy;
2396
2397         if (!include_phy && priv->last_phy_res[0])
2398                 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
2399
2400         if (!rx_start) {
2401                 IWL_ERROR("MPDU frame without a PHY data\n");
2402                 return;
2403         }
2404         if (include_phy) {
2405                 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
2406                                                rx_start->cfg_phy_cnt);
2407
2408                 len = le16_to_cpu(rx_start->byte_count);
2409
2410                 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
2411                                   sizeof(struct iwl4965_rx_phy_res) +
2412                                   rx_start->cfg_phy_cnt + len);
2413
2414         } else {
2415                 struct iwl4965_rx_mpdu_res_start *amsdu =
2416                     (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
2417
2418                 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
2419                                sizeof(struct iwl4965_rx_mpdu_res_start));
2420                 len =  le16_to_cpu(amsdu->byte_count);
2421                 rx_start->byte_count = amsdu->byte_count;
2422                 rx_end = (__le32 *) (((u8 *) hdr) + len);
2423         }
2424         /* In monitor mode allow 802.11 ACk frames (10 bytes) */
2425         if (len > priv->hw_params.max_pkt_size ||
2426             len < ((priv->iw_mode == IEEE80211_IF_TYPE_MNTR) ? 10 : 16)) {
2427                 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
2428                 return;
2429         }
2430
2431         ampdu_status = le32_to_cpu(*rx_end);
2432         skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
2433
2434         if (!include_phy) {
2435                 /* New status scheme, need to translate */
2436                 ampdu_status_legacy = ampdu_status;
2437                 ampdu_status = iwl4965_translate_rx_status(priv, ampdu_status);
2438         }
2439
2440         /* start from MAC */
2441         skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
2442         skb_put(rxb->skb, len); /* end where data ends */
2443
2444         /* We only process data packets if the interface is open */
2445         if (unlikely(!priv->is_open)) {
2446                 IWL_DEBUG_DROP_LIMIT
2447                     ("Dropping packet while interface is not open.\n");
2448                 return;
2449         }
2450
2451         stats->flag = 0;
2452         hdr = (struct ieee80211_hdr *)rxb->skb->data;
2453
2454         /*  in case of HW accelerated crypto and bad decryption, drop */
2455         if (!priv->hw_params.sw_crypto &&
2456             iwl4965_set_decrypted_flag(priv, hdr, ampdu_status, stats))
2457                 return;
2458
2459         if (priv->add_radiotap)
2460                 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
2461
2462         iwl_update_rx_stats(priv, le16_to_cpu(hdr->frame_control), len);
2463         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
2464         priv->alloc_rxb_skb--;
2465         rxb->skb = NULL;
2466 }
2467
2468 /* Calc max signal level (dBm) among 3 possible receivers */
2469 static int iwl4965_calc_rssi(struct iwl_priv *priv,
2470                              struct iwl4965_rx_phy_res *rx_resp)
2471 {
2472         /* data from PHY/DSP regarding signal strength, etc.,
2473          *   contents are always there, not configurable by host.  */
2474         struct iwl4965_rx_non_cfg_phy *ncphy =
2475             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
2476         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
2477                         >> IWL_AGC_DB_POS;
2478
2479         u32 valid_antennae =
2480             (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
2481                         >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
2482         u8 max_rssi = 0;
2483         u32 i;
2484
2485         /* Find max rssi among 3 possible receivers.
2486          * These values are measured by the digital signal processor (DSP).
2487          * They should stay fairly constant even as the signal strength varies,
2488          *   if the radio's automatic gain control (AGC) is working right.
2489          * AGC value (see below) will provide the "interesting" info. */
2490         for (i = 0; i < 3; i++)
2491                 if (valid_antennae & (1 << i))
2492                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
2493
2494         IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
2495                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
2496                 max_rssi, agc);
2497
2498         /* dBm = max_rssi dB - agc dB - constant.
2499          * Higher AGC (higher radio gain) means lower signal. */
2500         return (max_rssi - agc - IWL_RSSI_OFFSET);
2501 }
2502
2503 static void iwl4965_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
2504 {
2505         unsigned long flags;
2506
2507         spin_lock_irqsave(&priv->sta_lock, flags);
2508         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
2509         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
2510         priv->stations[sta_id].sta.sta.modify_mask = 0;
2511         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
2512         spin_unlock_irqrestore(&priv->sta_lock, flags);
2513
2514         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
2515 }
2516
2517 static void iwl4965_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
2518 {
2519         /* FIXME: need locking over ps_status ??? */
2520         u8 sta_id = iwl_find_station(priv, addr);
2521
2522         if (sta_id != IWL_INVALID_STATION) {
2523                 u8 sta_awake = priv->stations[sta_id].
2524                                 ps_status == STA_PS_STATUS_WAKE;
2525
2526                 if (sta_awake && ps_bit)
2527                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
2528                 else if (!sta_awake && !ps_bit) {
2529                         iwl4965_sta_modify_ps_wake(priv, sta_id);
2530                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
2531                 }
2532         }
2533 }
2534 #ifdef CONFIG_IWLWIFI_DEBUG
2535
2536 /**
2537  * iwl4965_dbg_report_frame - dump frame to syslog during debug sessions
2538  *
2539  * You may hack this function to show different aspects of received frames,
2540  * including selective frame dumps.
2541  * group100 parameter selects whether to show 1 out of 100 good frames.
2542  *
2543  * TODO:  This was originally written for 3945, need to audit for
2544  *        proper operation with 4965.
2545  */
2546 static void iwl4965_dbg_report_frame(struct iwl_priv *priv,
2547                       struct iwl_rx_packet *pkt,
2548                       struct ieee80211_hdr *header, int group100)
2549 {
2550         u32 to_us;
2551         u32 print_summary = 0;
2552         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
2553         u32 hundred = 0;
2554         u32 dataframe = 0;
2555         u16 fc;
2556         u16 seq_ctl;
2557         u16 channel;
2558         u16 phy_flags;
2559         int rate_sym;
2560         u16 length;
2561         u16 status;
2562         u16 bcn_tmr;
2563         u32 tsf_low;
2564         u64 tsf;
2565         u8 rssi;
2566         u8 agc;
2567         u16 sig_avg;
2568         u16 noise_diff;
2569         struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
2570         struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
2571         struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
2572         u8 *data = IWL_RX_DATA(pkt);
2573
2574         if (likely(!(priv->debug_level & IWL_DL_RX)))
2575                 return;
2576
2577         /* MAC header */
2578         fc = le16_to_cpu(header->frame_control);
2579         seq_ctl = le16_to_cpu(header->seq_ctrl);
2580
2581         /* metadata */
2582         channel = le16_to_cpu(rx_hdr->channel);
2583         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
2584         rate_sym = rx_hdr->rate;
2585         length = le16_to_cpu(rx_hdr->len);
2586
2587         /* end-of-frame status and timestamp */
2588         status = le32_to_cpu(rx_end->status);
2589         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
2590         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
2591         tsf = le64_to_cpu(rx_end->timestamp);
2592
2593         /* signal statistics */
2594         rssi = rx_stats->rssi;
2595         agc = rx_stats->agc;
2596         sig_avg = le16_to_cpu(rx_stats->sig_avg);
2597         noise_diff = le16_to_cpu(rx_stats->noise_diff);
2598
2599         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
2600
2601         /* if data frame is to us and all is good,
2602          *   (optionally) print summary for only 1 out of every 100 */
2603         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
2604             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
2605                 dataframe = 1;
2606                 if (!group100)
2607                         print_summary = 1;      /* print each frame */
2608                 else if (priv->framecnt_to_us < 100) {
2609                         priv->framecnt_to_us++;
2610                         print_summary = 0;
2611                 } else {
2612                         priv->framecnt_to_us = 0;
2613                         print_summary = 1;
2614                         hundred = 1;
2615                 }
2616         } else {
2617                 /* print summary for all other frames */
2618                 print_summary = 1;
2619         }
2620
2621         if (print_summary) {
2622                 char *title;
2623                 int rate_idx;
2624                 u32 bitrate;
2625
2626                 if (hundred)
2627                         title = "100Frames";
2628                 else if (fc & IEEE80211_FCTL_RETRY)
2629                         title = "Retry";
2630                 else if (ieee80211_is_assoc_response(fc))
2631                         title = "AscRsp";
2632                 else if (ieee80211_is_reassoc_response(fc))
2633                         title = "RasRsp";
2634                 else if (ieee80211_is_probe_response(fc)) {
2635                         title = "PrbRsp";
2636                         print_dump = 1; /* dump frame contents */
2637                 } else if (ieee80211_is_beacon(fc)) {
2638                         title = "Beacon";
2639                         print_dump = 1; /* dump frame contents */
2640                 } else if (ieee80211_is_atim(fc))
2641                         title = "ATIM";
2642                 else if (ieee80211_is_auth(fc))
2643                         title = "Auth";
2644                 else if (ieee80211_is_deauth(fc))
2645                         title = "DeAuth";
2646                 else if (ieee80211_is_disassoc(fc))
2647                         title = "DisAssoc";
2648                 else
2649                         title = "Frame";
2650
2651                 rate_idx = iwl4965_hwrate_to_plcp_idx(rate_sym);
2652                 if (unlikely(rate_idx == -1))
2653                         bitrate = 0;
2654                 else
2655                         bitrate = iwl_rates[rate_idx].ieee / 2;
2656
2657                 /* print frame summary.
2658                  * MAC addresses show just the last byte (for brevity),
2659                  *    but you can hack it to show more, if you'd like to. */
2660                 if (dataframe)
2661                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
2662                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
2663                                      title, fc, header->addr1[5],
2664                                      length, rssi, channel, bitrate);
2665                 else {
2666                         /* src/dst addresses assume managed mode */
2667                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
2668                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
2669                                      "phy=0x%02x, chnl=%d\n",
2670                                      title, fc, header->addr1[5],
2671                                      header->addr3[5], rssi,
2672                                      tsf_low - priv->scan_start_tsf,
2673                                      phy_flags, channel);
2674                 }
2675         }
2676         if (print_dump)
2677                 iwl_print_hex_dump(priv, IWL_DL_RX, data, length);
2678 }
2679 #else
2680 static inline void iwl4965_dbg_report_frame(struct iwl_priv *priv,
2681                                             struct iwl_rx_packet *pkt,
2682                                             struct ieee80211_hdr *header,
2683                                             int group100)
2684 {
2685 }
2686 #endif
2687
2688
2689
2690 /* Called for REPLY_RX (legacy ABG frames), or
2691  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
2692 void iwl4965_rx_reply_rx(struct iwl_priv *priv,
2693                                 struct iwl_rx_mem_buffer *rxb)
2694 {
2695         struct ieee80211_hdr *header;
2696         struct ieee80211_rx_status rx_status;
2697         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2698         /* Use phy data (Rx signal strength, etc.) contained within
2699          *   this rx packet for legacy frames,
2700          *   or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
2701         int include_phy = (pkt->hdr.cmd == REPLY_RX);
2702         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
2703                 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
2704                 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
2705         __le32 *rx_end;
2706         unsigned int len = 0;
2707         u16 fc;
2708         u8 network_packet;
2709
2710         rx_status.mactime = le64_to_cpu(rx_start->timestamp);
2711         rx_status.freq =
2712                 ieee80211_channel_to_frequency(le16_to_cpu(rx_start->channel));
2713         rx_status.band = (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
2714                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
2715         rx_status.rate_idx =
2716                 iwl4965_hwrate_to_plcp_idx(le32_to_cpu(rx_start->rate_n_flags));
2717         if (rx_status.band == IEEE80211_BAND_5GHZ)
2718                 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
2719
2720         rx_status.antenna = 0;
2721         rx_status.flag = 0;
2722
2723         if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
2724                 IWL_DEBUG_DROP("dsp size out of range [0,20]: %d/n",
2725                                 rx_start->cfg_phy_cnt);
2726                 return;
2727         }
2728
2729         if (!include_phy) {
2730                 if (priv->last_phy_res[0])
2731                         rx_start = (struct iwl4965_rx_phy_res *)
2732                                 &priv->last_phy_res[1];
2733                 else
2734                         rx_start = NULL;
2735         }
2736
2737         if (!rx_start) {
2738                 IWL_ERROR("MPDU frame without a PHY data\n");
2739                 return;
2740         }
2741
2742         if (include_phy) {
2743                 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
2744                                                   + rx_start->cfg_phy_cnt);
2745
2746                 len = le16_to_cpu(rx_start->byte_count);
2747                 rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt +
2748                                   sizeof(struct iwl4965_rx_phy_res) + len);
2749         } else {
2750                 struct iwl4965_rx_mpdu_res_start *amsdu =
2751                         (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
2752
2753                 header = (void *)(pkt->u.raw +
2754                         sizeof(struct iwl4965_rx_mpdu_res_start));
2755                 len = le16_to_cpu(amsdu->byte_count);
2756                 rx_end = (__le32 *) (pkt->u.raw +
2757                         sizeof(struct iwl4965_rx_mpdu_res_start) + len);
2758         }
2759
2760         if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
2761             !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
2762                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
2763                                 le32_to_cpu(*rx_end));
2764                 return;
2765         }
2766
2767         priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
2768
2769         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
2770         rx_status.signal = iwl4965_calc_rssi(priv, rx_start);
2771
2772         /* Meaningful noise values are available only from beacon statistics,
2773          *   which are gathered only when associated, and indicate noise
2774          *   only for the associated network channel ...
2775          * Ignore these noise values while scanning (other channels) */
2776         if (iwl_is_associated(priv) &&
2777             !test_bit(STATUS_SCANNING, &priv->status)) {
2778                 rx_status.noise = priv->last_rx_noise;
2779                 rx_status.qual = iwl4965_calc_sig_qual(rx_status.signal,
2780                                                          rx_status.noise);
2781         } else {
2782                 rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
2783                 rx_status.qual = iwl4965_calc_sig_qual(rx_status.signal, 0);
2784         }
2785
2786         /* Reset beacon noise level if not associated. */
2787         if (!iwl_is_associated(priv))
2788                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
2789
2790         /* Set "1" to report good data frames in groups of 100 */
2791         /* FIXME: need to optimze the call: */
2792         iwl4965_dbg_report_frame(priv, pkt, header, 1);
2793
2794         IWL_DEBUG_STATS_LIMIT("Rssi %d, noise %d, qual %d, TSF %llu\n",
2795                               rx_status.signal, rx_status.noise, rx_status.signal,
2796                               (unsigned long long)rx_status.mactime);
2797
2798
2799         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
2800                 iwl4965_handle_data_packet(priv, 1, include_phy,
2801                                                  rxb, &rx_status);
2802                 return;
2803         }
2804
2805         network_packet = iwl4965_is_network_packet(priv, header);
2806         if (network_packet) {
2807                 priv->last_rx_rssi = rx_status.signal;
2808                 priv->last_beacon_time =  priv->ucode_beacon_time;
2809                 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
2810         }
2811
2812         fc = le16_to_cpu(header->frame_control);
2813         switch (fc & IEEE80211_FCTL_FTYPE) {
2814         case IEEE80211_FTYPE_MGMT:
2815                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
2816                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
2817                                                 header->addr2);
2818                 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &rx_status);
2819                 break;
2820
2821         case IEEE80211_FTYPE_CTL:
2822 #ifdef CONFIG_IWL4965_HT
2823                 switch (fc & IEEE80211_FCTL_STYPE) {
2824                 case IEEE80211_STYPE_BACK_REQ:
2825                         IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
2826                         iwl4965_handle_data_packet(priv, 0, include_phy,
2827                                                 rxb, &rx_status);
2828                         break;
2829                 default:
2830                         break;
2831                 }
2832 #endif
2833                 break;
2834
2835         case IEEE80211_FTYPE_DATA: {
2836                 DECLARE_MAC_BUF(mac1);
2837                 DECLARE_MAC_BUF(mac2);
2838                 DECLARE_MAC_BUF(mac3);
2839
2840                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
2841                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
2842                                                 header->addr2);
2843
2844                 if (unlikely(!network_packet))
2845                         IWL_DEBUG_DROP("Dropping (non network): "
2846                                        "%s, %s, %s\n",
2847                                        print_mac(mac1, header->addr1),
2848                                        print_mac(mac2, header->addr2),
2849                                        print_mac(mac3, header->addr3));
2850                 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
2851                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
2852                                        print_mac(mac1, header->addr1),
2853                                        print_mac(mac2, header->addr2),
2854                                        print_mac(mac3, header->addr3));
2855                 else
2856                         iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
2857                                                    &rx_status);
2858                 break;
2859         }
2860         default:
2861                 break;
2862
2863         }
2864 }
2865
2866 #ifdef CONFIG_IWL4965_HT
2867
2868 /**
2869  * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
2870  *
2871  * Go through block-ack's bitmap of ACK'd frames, update driver's record of
2872  * ACK vs. not.  This gets sent to mac80211, then to rate scaling algo.
2873  */
2874 static int iwl4965_tx_status_reply_compressed_ba(struct iwl_priv *priv,
2875                                                  struct iwl_ht_agg *agg,
2876                                                  struct iwl4965_compressed_ba_resp*
2877                                                  ba_resp)
2878
2879 {
2880         int i, sh, ack;
2881         u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
2882         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
2883         u64 bitmap;
2884         int successes = 0;
2885         struct ieee80211_tx_info *info;
2886
2887         if (unlikely(!agg->wait_for_ba))  {
2888                 IWL_ERROR("Received BA when not expected\n");
2889                 return -EINVAL;
2890         }
2891
2892         /* Mark that the expected block-ack response arrived */
2893         agg->wait_for_ba = 0;
2894         IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
2895
2896         /* Calculate shift to align block-ack bits with our Tx window bits */
2897         sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
2898         if (sh < 0) /* tbw something is wrong with indices */
2899                 sh += 0x100;
2900
2901         /* don't use 64-bit values for now */
2902         bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
2903
2904         if (agg->frame_count > (64 - sh)) {
2905                 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
2906                 return -1;
2907         }
2908
2909         /* check for success or failure according to the
2910          * transmitted bitmap and block-ack bitmap */
2911         bitmap &= agg->bitmap;
2912
2913         /* For each frame attempted in aggregation,
2914          * update driver's record of tx frame's status. */
2915         for (i = 0; i < agg->frame_count ; i++) {
2916                 ack = bitmap & (1 << i);
2917                 successes += !!ack;
2918                 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
2919                         ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
2920                         agg->start_idx + i);
2921         }
2922
2923         info = IEEE80211_SKB_CB(priv->txq[scd_flow].txb[agg->start_idx].skb[0]);
2924         memset(&info->status, 0, sizeof(info->status));
2925         info->flags = IEEE80211_TX_STAT_ACK;
2926         info->flags |= IEEE80211_TX_STAT_AMPDU;
2927         info->status.ampdu_ack_map = successes;
2928         info->status.ampdu_ack_len = agg->frame_count;
2929         iwl4965_hwrate_to_tx_control(priv, agg->rate_n_flags, info);
2930
2931         IWL_DEBUG_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap);
2932
2933         return 0;
2934 }
2935
2936 /**
2937  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
2938  */
2939 static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
2940                                             u16 txq_id)
2941 {
2942         /* Simply stop the queue, but don't change any configuration;
2943          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
2944         iwl_write_prph(priv,
2945                 IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
2946                 (0 << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE)|
2947                 (1 << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
2948 }
2949
2950 /**
2951  * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
2952  * priv->lock must be held by the caller
2953  */
2954 static int iwl4965_txq_agg_disable(struct iwl_priv *priv, u16 txq_id,
2955                                    u16 ssn_idx, u8 tx_fifo)
2956 {
2957         int ret = 0;
2958
2959         if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
2960                 IWL_WARNING("queue number too small: %d, must be > %d\n",
2961                                 txq_id, IWL_BACK_QUEUE_FIRST_ID);
2962                 return -EINVAL;
2963         }
2964
2965         ret = iwl_grab_nic_access(priv);
2966         if (ret)
2967                 return ret;
2968
2969         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
2970
2971         iwl_clear_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
2972
2973         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
2974         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
2975         /* supposes that ssn_idx is valid (!= 0xFFF) */
2976         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
2977
2978         iwl_clear_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
2979         iwl_txq_ctx_deactivate(priv, txq_id);
2980         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
2981
2982         iwl_release_nic_access(priv);
2983
2984         return 0;
2985 }
2986
2987
2988 /**
2989  * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
2990  *
2991  * Handles block-acknowledge notification from device, which reports success
2992  * of frames sent via aggregation.
2993  */
2994 static void iwl4965_rx_reply_compressed_ba(struct iwl_priv *priv,
2995                                            struct iwl_rx_mem_buffer *rxb)
2996 {
2997         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2998         struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
2999         int index;
3000         struct iwl_tx_queue *txq = NULL;
3001         struct iwl_ht_agg *agg;
3002         DECLARE_MAC_BUF(mac);
3003
3004         /* "flow" corresponds to Tx queue */
3005         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
3006
3007         /* "ssn" is start of block-ack Tx window, corresponds to index
3008          * (in Tx queue's circular buffer) of first TFD/frame in window */
3009         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
3010
3011         if (scd_flow >= priv->hw_params.max_txq_num) {
3012                 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
3013                 return;
3014         }
3015
3016         txq = &priv->txq[scd_flow];
3017         agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
3018
3019         /* Find index just before block-ack window */
3020         index = iwl_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
3021
3022         /* TODO: Need to get this copy more safely - now good for debug */
3023
3024         IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
3025                            "sta_id = %d\n",
3026                            agg->wait_for_ba,
3027                            print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
3028                            ba_resp->sta_id);
3029         IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
3030                            "%d, scd_ssn = %d\n",
3031                            ba_resp->tid,
3032                            ba_resp->seq_ctl,
3033                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
3034                            ba_resp->scd_flow,
3035                            ba_resp->scd_ssn);
3036         IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
3037                            agg->start_idx,
3038                            (unsigned long long)agg->bitmap);
3039
3040         /* Update driver's record of ACK vs. not for each frame in window */
3041         iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
3042
3043         /* Release all TFDs before the SSN, i.e. all TFDs in front of
3044          * block-ack window (we assume that they've been successfully
3045          * transmitted ... if not, it's too late anyway). */
3046         if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
3047                 /* calculate mac80211 ampdu sw queue to wake */
3048                 int ampdu_q =
3049                    scd_flow - IWL_BACK_QUEUE_FIRST_ID + priv->hw->queues;
3050                 int freed = iwl_tx_queue_reclaim(priv, scd_flow, index);
3051                 priv->stations[ba_resp->sta_id].
3052                         tid[ba_resp->tid].tfds_in_queue -= freed;
3053                 if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
3054                         priv->mac80211_registered &&
3055                         agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
3056                         ieee80211_wake_queue(priv->hw, ampdu_q);
3057
3058                 iwl_txq_check_empty(priv, ba_resp->sta_id,
3059                                     ba_resp->tid, scd_flow);
3060         }
3061 }
3062
3063 /**
3064  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
3065  */
3066 static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
3067                                         u16 txq_id)
3068 {
3069         u32 tbl_dw_addr;
3070         u32 tbl_dw;
3071         u16 scd_q2ratid;
3072
3073         scd_q2ratid = ra_tid & IWL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
3074
3075         tbl_dw_addr = priv->scd_base_addr +
3076                         IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
3077
3078         tbl_dw = iwl_read_targ_mem(priv, tbl_dw_addr);
3079
3080         if (txq_id & 0x1)
3081                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
3082         else
3083                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
3084
3085         iwl_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
3086
3087         return 0;
3088 }
3089
3090
3091 /**
3092  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
3093  *
3094  * NOTE:  txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
3095  *        i.e. it must be one of the higher queues used for aggregation
3096  */
3097 static int iwl4965_txq_agg_enable(struct iwl_priv *priv, int txq_id,
3098                                   int tx_fifo, int sta_id, int tid, u16 ssn_idx)
3099 {
3100         unsigned long flags;
3101         int ret;
3102         u16 ra_tid;
3103
3104         if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
3105                 IWL_WARNING("queue number too small: %d, must be > %d\n",
3106                         txq_id, IWL_BACK_QUEUE_FIRST_ID);
3107
3108         ra_tid = BUILD_RAxTID(sta_id, tid);
3109
3110         /* Modify device's station table to Tx this TID */
3111         iwl_sta_modify_enable_tid_tx(priv, sta_id, tid);
3112
3113         spin_lock_irqsave(&priv->lock, flags);
3114         ret = iwl_grab_nic_access(priv);
3115         if (ret) {
3116                 spin_unlock_irqrestore(&priv->lock, flags);
3117                 return ret;
3118         }
3119
3120         /* Stop this Tx queue before configuring it */
3121         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
3122
3123         /* Map receiver-address / traffic-ID to this queue */
3124         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
3125
3126         /* Set this queue as a chain-building queue */
3127         iwl_set_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
3128
3129         /* Place first TFD at index corresponding to start sequence number.
3130          * Assumes that ssn_idx is valid (!= 0xFFF) */
3131         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
3132         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
3133         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
3134
3135         /* Set up Tx window size and frame limit for this queue */
3136         iwl_write_targ_mem(priv,
3137                 priv->scd_base_addr + IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
3138                 (SCD_WIN_SIZE << IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
3139                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
3140
3141         iwl_write_targ_mem(priv, priv->scd_base_addr +
3142                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
3143                 (SCD_FRAME_LIMIT << IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
3144                 & IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
3145
3146         iwl_set_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
3147
3148         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
3149         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
3150
3151         iwl_release_nic_access(priv);
3152         spin_unlock_irqrestore(&priv->lock, flags);
3153
3154         return 0;
3155 }
3156
3157 #endif /* CONFIG_IWL4965_HT */
3158
3159
3160 #ifdef CONFIG_IWL4965_HT
3161 static int iwl4965_rx_agg_start(struct iwl_priv *priv,
3162                                 const u8 *addr, int tid, u16 ssn)
3163 {
3164         unsigned long flags;
3165         int sta_id;
3166
3167         sta_id = iwl_find_station(priv, addr);
3168         if (sta_id == IWL_INVALID_STATION)
3169                 return -ENXIO;
3170
3171         spin_lock_irqsave(&priv->sta_lock, flags);
3172         priv->stations[sta_id].sta.station_flags_msk = 0;
3173         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
3174         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
3175         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
3176         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3177         spin_unlock_irqrestore(&priv->sta_lock, flags);
3178
3179         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
3180                                         CMD_ASYNC);
3181 }
3182
3183 static int iwl4965_rx_agg_stop(struct iwl_priv *priv,
3184                                const u8 *addr, int tid)
3185 {
3186         unsigned long flags;
3187         int sta_id;
3188
3189         sta_id = iwl_find_station(priv, addr);
3190         if (sta_id == IWL_INVALID_STATION)
3191                 return -ENXIO;
3192
3193         spin_lock_irqsave(&priv->sta_lock, flags);
3194         priv->stations[sta_id].sta.station_flags_msk = 0;
3195         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
3196         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
3197         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3198         spin_unlock_irqrestore(&priv->sta_lock, flags);
3199
3200         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
3201                                         CMD_ASYNC);
3202 }
3203
3204 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
3205                              enum ieee80211_ampdu_mlme_action action,
3206                              const u8 *addr, u16 tid, u16 *ssn)
3207 {
3208         struct iwl_priv *priv = hw->priv;
3209         DECLARE_MAC_BUF(mac);
3210
3211         IWL_DEBUG_HT("A-MPDU action on addr %s tid %d\n",
3212                      print_mac(mac, addr), tid);
3213
3214         switch (action) {
3215         case IEEE80211_AMPDU_RX_START:
3216                 IWL_DEBUG_HT("start Rx\n");
3217                 return iwl4965_rx_agg_start(priv, addr, tid, *ssn);
3218         case IEEE80211_AMPDU_RX_STOP:
3219                 IWL_DEBUG_HT("stop Rx\n");
3220                 return iwl4965_rx_agg_stop(priv, addr, tid);
3221         case IEEE80211_AMPDU_TX_START:
3222                 IWL_DEBUG_HT("start Tx\n");
3223                 return iwl_tx_agg_start(priv, addr, tid, ssn);
3224         case IEEE80211_AMPDU_TX_STOP:
3225                 IWL_DEBUG_HT("stop Tx\n");
3226                 return iwl_tx_agg_stop(priv, addr, tid);
3227         default:
3228                 IWL_DEBUG_HT("unknown\n");
3229                 return -EINVAL;
3230                 break;
3231         }
3232         return 0;
3233 }
3234 #endif /* CONFIG_IWL4965_HT */
3235
3236
3237 static u16 iwl4965_get_hcmd_size(u8 cmd_id, u16 len)
3238 {
3239         switch (cmd_id) {
3240         case REPLY_RXON:
3241                 return (u16) sizeof(struct iwl4965_rxon_cmd);
3242         default:
3243                 return len;
3244         }
3245 }
3246
3247 static u16 iwl4965_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
3248 {
3249         struct iwl4965_addsta_cmd *addsta = (struct iwl4965_addsta_cmd *)data;
3250         addsta->mode = cmd->mode;
3251         memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
3252         memcpy(&addsta->key, &cmd->key, sizeof(struct iwl4965_keyinfo));
3253         addsta->station_flags = cmd->station_flags;
3254         addsta->station_flags_msk = cmd->station_flags_msk;
3255         addsta->tid_disable_tx = cmd->tid_disable_tx;
3256         addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
3257         addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
3258         addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
3259         addsta->reserved1 = __constant_cpu_to_le16(0);
3260         addsta->reserved2 = __constant_cpu_to_le32(0);
3261
3262         return (u16)sizeof(struct iwl4965_addsta_cmd);
3263 }
3264
3265 #ifdef CONFIG_IWL4965_HT
3266 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
3267 {
3268         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
3269                                 tx_resp->frame_count);
3270         return le32_to_cpu(*scd_ssn) & MAX_SN;
3271
3272 }
3273
3274 /**
3275  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
3276  */
3277 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
3278                                       struct iwl_ht_agg *agg,
3279                                       struct iwl4965_tx_resp_agg *tx_resp,
3280                                       u16 start_idx)
3281 {
3282         u16 status;
3283         struct agg_tx_status *frame_status = &tx_resp->status;
3284         struct ieee80211_tx_info *info = NULL;
3285         struct ieee80211_hdr *hdr = NULL;
3286         int i, sh;
3287         int txq_id, idx;
3288         u16 seq;
3289
3290         if (agg->wait_for_ba)
3291                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
3292
3293         agg->frame_count = tx_resp->frame_count;
3294         agg->start_idx = start_idx;
3295         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3296         agg->bitmap = 0;
3297
3298         /* # frames attempted by Tx command */
3299         if (agg->frame_count == 1) {
3300                 /* Only one frame was attempted; no block-ack will arrive */
3301                 status = le16_to_cpu(frame_status[0].status);
3302                 seq  = le16_to_cpu(frame_status[0].sequence);
3303                 idx = SEQ_TO_INDEX(seq);
3304                 txq_id = SEQ_TO_QUEUE(seq);
3305
3306                 /* FIXME: code repetition */
3307                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
3308                                    agg->frame_count, agg->start_idx, idx);
3309
3310                 info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb[0]);
3311                 info->status.retry_count = tx_resp->failure_frame;
3312                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3313                 info->flags |= iwl_is_tx_success(status)?
3314                         IEEE80211_TX_STAT_ACK : 0;
3315                 iwl4965_hwrate_to_tx_control(priv,
3316                                              le32_to_cpu(tx_resp->rate_n_flags),
3317                                              info);
3318                 /* FIXME: code repetition end */
3319
3320                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3321                                     status & 0xff, tx_resp->failure_frame);
3322                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3323                         iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3324
3325                 agg->wait_for_ba = 0;
3326         } else {
3327                 /* Two or more frames were attempted; expect block-ack */
3328                 u64 bitmap = 0;
3329                 int start = agg->start_idx;
3330
3331                 /* Construct bit-map of pending frames within Tx window */
3332                 for (i = 0; i < agg->frame_count; i++) {
3333                         u16 sc;
3334                         status = le16_to_cpu(frame_status[i].status);
3335                         seq  = le16_to_cpu(frame_status[i].sequence);
3336                         idx = SEQ_TO_INDEX(seq);
3337                         txq_id = SEQ_TO_QUEUE(seq);
3338
3339                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3340                                       AGG_TX_STATE_ABORT_MSK))
3341                                 continue;
3342
3343                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3344                                            agg->frame_count, txq_id, idx);
3345
3346                         hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
3347
3348                         sc = le16_to_cpu(hdr->seq_ctrl);
3349                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3350                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
3351                                           " idx=%d, seq_idx=%d, seq=%d\n",
3352                                           idx, SEQ_TO_SN(sc),
3353                                           hdr->seq_ctrl);
3354                                 return -1;
3355                         }
3356
3357                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3358                                            i, idx, SEQ_TO_SN(sc));
3359
3360                         sh = idx - start;
3361                         if (sh > 64) {
3362                                 sh = (start - idx) + 0xff;
3363                                 bitmap = bitmap << sh;
3364                                 sh = 0;
3365                                 start = idx;
3366                         } else if (sh < -64)
3367                                 sh  = 0xff - (start - idx);
3368                         else if (sh < 0) {
3369                                 sh = start - idx;
3370                                 start = idx;
3371                                 bitmap = bitmap << sh;
3372                                 sh = 0;
3373                         }
3374                         bitmap |= (1 << sh);
3375                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3376                                            start, (u32)(bitmap & 0xFFFFFFFF));
3377                 }
3378
3379                 agg->bitmap = bitmap;
3380                 agg->start_idx = start;
3381                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3382                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
3383                                    agg->frame_count, agg->start_idx,
3384                                    (unsigned long long)agg->bitmap);
3385
3386                 if (bitmap)
3387                         agg->wait_for_ba = 1;
3388         }
3389         return 0;
3390 }
3391 #endif
3392
3393 /**
3394  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
3395  */
3396 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
3397                                 struct iwl_rx_mem_buffer *rxb)
3398 {
3399         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3400         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3401         int txq_id = SEQ_TO_QUEUE(sequence);
3402         int index = SEQ_TO_INDEX(sequence);
3403         struct iwl_tx_queue *txq = &priv->txq[txq_id];
3404         struct ieee80211_tx_info *info;
3405         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3406         u32  status = le32_to_cpu(tx_resp->status);
3407 #ifdef CONFIG_IWL4965_HT
3408         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
3409         u16 fc;
3410         struct ieee80211_hdr *hdr;
3411         u8 *qc = NULL;
3412 #endif
3413
3414         if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
3415                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3416                           "is out of range [0-%d] %d %d\n", txq_id,
3417                           index, txq->q.n_bd, txq->q.write_ptr,
3418                           txq->q.read_ptr);
3419                 return;
3420         }
3421
3422         info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]);
3423         memset(&info->status, 0, sizeof(info->status));
3424
3425 #ifdef CONFIG_IWL4965_HT
3426         hdr = iwl_tx_queue_get_hdr(priv, txq_id, index);
3427         fc = le16_to_cpu(hdr->frame_control);
3428         if (ieee80211_is_qos_data(fc)) {
3429                 qc = ieee80211_get_qos_ctrl(hdr, ieee80211_get_hdrlen(fc));
3430                 tid = qc[0] & 0xf;
3431         }
3432
3433         sta_id = iwl_get_ra_sta_id(priv, hdr);
3434         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
3435                 IWL_ERROR("Station not known\n");
3436                 return;
3437         }
3438
3439         if (txq->sched_retry) {
3440                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
3441                 struct iwl_ht_agg *agg = NULL;
3442
3443                 if (!qc)
3444                         return;
3445
3446                 agg = &priv->stations[sta_id].tid[tid].agg;
3447
3448                 iwl4965_tx_status_reply_tx(priv, agg,
3449                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
3450
3451                 if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status)) {
3452                         /* TODO: send BAR */
3453                 }
3454
3455                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
3456                         int freed, ampdu_q;
3457                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3458                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3459                                            "%d index %d\n", scd_ssn , index);
3460                         freed = iwl_tx_queue_reclaim(priv, txq_id, index);
3461                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3462
3463                         if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
3464                             txq_id >= 0 && priv->mac80211_registered &&
3465                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA) {
3466                                 /* calculate mac80211 ampdu sw queue to wake */
3467                                 ampdu_q = txq_id - IWL_BACK_QUEUE_FIRST_ID +
3468                                           priv->hw->queues;
3469                                 if (agg->state == IWL_AGG_OFF)
3470                                         ieee80211_wake_queue(priv->hw, txq_id);
3471                                 else
3472                                         ieee80211_wake_queue(priv->hw, ampdu_q);
3473                         }
3474                         iwl_txq_check_empty(priv, sta_id, tid, txq_id);
3475                 }
3476         } else {
3477 #endif /* CONFIG_IWL4965_HT */
3478
3479         info->status.retry_count = tx_resp->failure_frame;
3480         info->flags |= iwl_is_tx_success(status) ? IEEE80211_TX_STAT_ACK : 0;
3481         iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
3482                                      info);
3483
3484         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3485                      "retries %d\n", txq_id, iwl_get_tx_fail_reason(status),
3486                      status, le32_to_cpu(tx_resp->rate_n_flags),
3487                      tx_resp->failure_frame);
3488
3489         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3490 #ifdef CONFIG_IWL4965_HT
3491         if (index != -1) {
3492                 int freed = iwl_tx_queue_reclaim(priv, txq_id, index);
3493                 if (tid != MAX_TID_COUNT)
3494                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3495                 if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
3496                         (txq_id >= 0) && priv->mac80211_registered)
3497                         ieee80211_wake_queue(priv->hw, txq_id);
3498                 if (tid != MAX_TID_COUNT)
3499                         iwl_txq_check_empty(priv, sta_id, tid, txq_id);
3500         }
3501         }
3502 #endif /* CONFIG_IWL4965_HT */
3503
3504         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3505                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3506 }
3507
3508
3509 /* Set up 4965-specific Rx frame reply handlers */
3510 static void iwl4965_rx_handler_setup(struct iwl_priv *priv)
3511 {
3512         /* Legacy Rx frames */
3513         priv->rx_handlers[REPLY_RX] = iwl4965_rx_reply_rx;
3514         /* Tx response */
3515         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3516
3517 #ifdef CONFIG_IWL4965_HT
3518         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
3519 #endif /* CONFIG_IWL4965_HT */
3520 }
3521
3522 void iwl4965_hw_setup_deferred_work(struct iwl_priv *priv)
3523 {
3524         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
3525 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
3526         INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
3527 #endif
3528         init_timer(&priv->statistics_periodic);
3529         priv->statistics_periodic.data = (unsigned long)priv;
3530         priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
3531 }
3532
3533 void iwl4965_hw_cancel_deferred_work(struct iwl_priv *priv)
3534 {
3535         del_timer_sync(&priv->statistics_periodic);
3536
3537         cancel_delayed_work(&priv->init_alive_start);
3538 }
3539
3540
3541 static struct iwl_hcmd_ops iwl4965_hcmd = {
3542         .rxon_assoc = iwl4965_send_rxon_assoc,
3543 };
3544
3545 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
3546         .get_hcmd_size = iwl4965_get_hcmd_size,
3547         .build_addsta_hcmd = iwl4965_build_addsta_hcmd,
3548 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
3549         .chain_noise_reset = iwl4965_chain_noise_reset,
3550         .gain_computation = iwl4965_gain_computation,
3551 #endif
3552 };
3553
3554 static struct iwl_lib_ops iwl4965_lib = {
3555         .set_hw_params = iwl4965_hw_set_hw_params,
3556         .alloc_shared_mem = iwl4965_alloc_shared_mem,
3557         .free_shared_mem = iwl4965_free_shared_mem,
3558         .shared_mem_rx_idx = iwl4965_shared_mem_rx_idx,
3559         .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
3560         .txq_set_sched = iwl4965_txq_set_sched,
3561 #ifdef CONFIG_IWL4965_HT
3562         .txq_agg_enable = iwl4965_txq_agg_enable,
3563         .txq_agg_disable = iwl4965_txq_agg_disable,
3564 #endif
3565         .rx_handler_setup = iwl4965_rx_handler_setup,
3566         .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
3567         .alive_notify = iwl4965_alive_notify,
3568         .init_alive_start = iwl4965_init_alive_start,
3569         .load_ucode = iwl4965_load_bsm,
3570         .apm_ops = {
3571                 .init = iwl4965_apm_init,
3572                 .reset = iwl4965_apm_reset,
3573                 .stop = iwl4965_apm_stop,
3574                 .config = iwl4965_nic_config,
3575                 .set_pwr_src = iwl4965_set_pwr_src,
3576         },
3577         .eeprom_ops = {
3578                 .regulatory_bands = {
3579                         EEPROM_REGULATORY_BAND_1_CHANNELS,
3580                         EEPROM_REGULATORY_BAND_2_CHANNELS,
3581                         EEPROM_REGULATORY_BAND_3_CHANNELS,
3582                         EEPROM_REGULATORY_BAND_4_CHANNELS,
3583                         EEPROM_REGULATORY_BAND_5_CHANNELS,
3584                         EEPROM_4965_REGULATORY_BAND_24_FAT_CHANNELS,
3585                         EEPROM_4965_REGULATORY_BAND_52_FAT_CHANNELS
3586                 },
3587                 .verify_signature  = iwlcore_eeprom_verify_signature,
3588                 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
3589                 .release_semaphore = iwlcore_eeprom_release_semaphore,
3590                 .check_version = iwl4965_eeprom_check_version,
3591                 .query_addr = iwlcore_eeprom_query_addr,
3592         },
3593         .radio_kill_sw = iwl4965_radio_kill_sw,
3594         .set_power = iwl4965_set_power,
3595         .update_chain_flags = iwl4965_update_chain_flags,
3596 };
3597
3598 static struct iwl_ops iwl4965_ops = {
3599         .lib = &iwl4965_lib,
3600         .hcmd = &iwl4965_hcmd,
3601         .utils = &iwl4965_hcmd_utils,
3602 };
3603
3604 struct iwl_cfg iwl4965_agn_cfg = {
3605         .name = "4965AGN",
3606         .fw_name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode",
3607         .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
3608         .eeprom_size = IWL4965_EEPROM_IMG_SIZE,
3609         .ops = &iwl4965_ops,
3610         .mod_params = &iwl4965_mod_params,
3611 };
3612
3613 module_param_named(antenna, iwl4965_mod_params.antenna, int, 0444);
3614 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
3615 module_param_named(disable, iwl4965_mod_params.disable, int, 0444);
3616 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
3617 module_param_named(swcrypto, iwl4965_mod_params.sw_crypto, int, 0444);
3618 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])\n");
3619 module_param_named(debug, iwl4965_mod_params.debug, int, 0444);
3620 MODULE_PARM_DESC(debug, "debug output mask");
3621 module_param_named(
3622         disable_hw_scan, iwl4965_mod_params.disable_hw_scan, int, 0444);
3623 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
3624
3625 module_param_named(queues_num, iwl4965_mod_params.num_of_queues, int, 0444);
3626 MODULE_PARM_DESC(queues_num, "number of hw queues.");
3627
3628 /* QoS */
3629 module_param_named(qos_enable, iwl4965_mod_params.enable_qos, int, 0444);
3630 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
3631 module_param_named(amsdu_size_8K, iwl4965_mod_params.amsdu_size_8K, int, 0444);
3632 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
3633 module_param_named(fw_restart4965, iwl4965_mod_params.restart_fw, int, 0444);
3634 MODULE_PARM_DESC(fw_restart4965, "restart firmware in case of error");