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