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
  48 /* module parameters */
  49 static struct iwl_mod_params iwl4965_mod_params = {
  50         .num_of_queues = IWL49_NUM_QUEUES,
  51         .enable_qos = 1,
  52         .amsdu_size_8K = 1,
  53         .restart_fw = 1,
  54         /* the rest are 0 by default */
  55 };
  56
  57 #ifdef CONFIG_IWL4965_HT
  58
  59 static const u16 default_tid_to_tx_fifo[] = {
  60         IWL_TX_FIFO_AC1,
  61         IWL_TX_FIFO_AC0,
  62         IWL_TX_FIFO_AC0,
  63         IWL_TX_FIFO_AC1,
  64         IWL_TX_FIFO_AC2,
  65         IWL_TX_FIFO_AC2,
  66         IWL_TX_FIFO_AC3,
  67         IWL_TX_FIFO_AC3,
  68         IWL_TX_FIFO_NONE,
  69         IWL_TX_FIFO_NONE,
  70         IWL_TX_FIFO_NONE,
  71         IWL_TX_FIFO_NONE,
  72         IWL_TX_FIFO_NONE,
  73         IWL_TX_FIFO_NONE,
  74         IWL_TX_FIFO_NONE,
  75         IWL_TX_FIFO_NONE,
  76         IWL_TX_FIFO_AC3
  77 };
  78
  79 #endif  /*CONFIG_IWL4965_HT */
  80
  81 /* check contents of special bootstrap uCode SRAM */
  82 static int iwl4965_verify_bsm(struct iwl_priv *priv)
  83 {
  84         __le32 *image = priv->ucode_boot.v_addr;
  85         u32 len = priv->ucode_boot.len;
  86         u32 reg;
  87         u32 val;
  88
  89         IWL_DEBUG_INFO("Begin verify bsm\n");
  90
  91         /* verify BSM SRAM contents */
  92         val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
  93         for (reg = BSM_SRAM_LOWER_BOUND;
  94              reg < BSM_SRAM_LOWER_BOUND + len;
  95              reg += sizeof(u32), image++) {
  96                 val = iwl_read_prph(priv, reg);
  97                 if (val != le32_to_cpu(*image)) {
  98                         IWL_ERROR("BSM uCode verification failed at "
  99                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
 100                                   BSM_SRAM_LOWER_BOUND,
 101                                   reg - BSM_SRAM_LOWER_BOUND, len,
 102                                   val, le32_to_cpu(*image));
 103                         return -EIO;
 104                 }
 105         }
 106
 107         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
 108
 109         return 0;
 110 }
 111
 112 /**
 113  * iwl4965_load_bsm - Load bootstrap instructions
 114  *
 115  * BSM operation:
 116  *
 117  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
 118  * in special SRAM that does not power down during RFKILL.  When powering back
 119  * up after power-saving sleeps (or during initial uCode load), the BSM loads
 120  * the bootstrap program into the on-board processor, and starts it.
 121  *
 122  * The bootstrap program loads (via DMA) instructions and data for a new
 123  * program from host DRAM locations indicated by the host driver in the
 124  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
 125  * automatically.
 126  *
 127  * When initializing the NIC, the host driver points the BSM to the
 128  * "initialize" uCode image.  This uCode sets up some internal data, then
 129  * notifies host via "initialize alive" that it is complete.
 130  *
 131  * The host then replaces the BSM_DRAM_* pointer values to point to the
 132  * normal runtime uCode instructions and a backup uCode data cache buffer
 133  * (filled initially with starting data values for the on-board processor),
 134  * then triggers the "initialize" uCode to load and launch the runtime uCode,
 135  * which begins normal operation.
 136  *
 137  * When doing a power-save shutdown, runtime uCode saves data SRAM into
 138  * the backup data cache in DRAM before SRAM is powered down.
 139  *
 140  * When powering back up, the BSM loads the bootstrap program.  This reloads
 141  * the runtime uCode instructions and the backup data cache into SRAM,
 142  * and re-launches the runtime uCode from where it left off.
 143  */
 144 static int iwl4965_load_bsm(struct iwl_priv *priv)
 145 {
 146         __le32 *image = priv->ucode_boot.v_addr;
 147         u32 len = priv->ucode_boot.len;
 148         dma_addr_t pinst;
 149         dma_addr_t pdata;
 150         u32 inst_len;
 151         u32 data_len;
 152         int i;
 153         u32 done;
 154         u32 reg_offset;
 155         int ret;
 156
 157         IWL_DEBUG_INFO("Begin load bsm\n");
 158
 159         /* make sure bootstrap program is no larger than BSM's SRAM size */
 160         if (len > IWL_MAX_BSM_SIZE)
 161                 return -EINVAL;
 162
 163         /* Tell bootstrap uCode where to find the "Initialize" uCode
 164          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
 165          * NOTE:  iwl4965_initialize_alive_start() will replace these values,
 166          *        after the "initialize" uCode has run, to point to
 167          *        runtime/protocol instructions and backup data cache. */
 168         pinst = priv->ucode_init.p_addr >> 4;
 169         pdata = priv->ucode_init_data.p_addr >> 4;
 170         inst_len = priv->ucode_init.len;
 171         data_len = priv->ucode_init_data.len;
 172
 173         ret = iwl_grab_nic_access(priv);
 174         if (ret)
 175                 return ret;
 176
 177         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 178         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 179         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
 180         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
 181
 182         /* Fill BSM memory with bootstrap instructions */
 183         for (reg_offset = BSM_SRAM_LOWER_BOUND;
 184              reg_offset < BSM_SRAM_LOWER_BOUND + len;
 185              reg_offset += sizeof(u32), image++)
 186                 _iwl_write_prph(priv, reg_offset, le32_to_cpu(*image));
 187
 188         ret = iwl4965_verify_bsm(priv);
 189         if (ret) {
 190                 iwl_release_nic_access(priv);
 191                 return ret;
 192         }
 193
 194         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
 195         iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
 196         iwl_write_prph(priv, BSM_WR_MEM_DST_REG, RTC_INST_LOWER_BOUND);
 197         iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
 198
 199         /* Load bootstrap code into instruction SRAM now,
 200          *   to prepare to load "initialize" uCode */
 201         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);
 202
 203         /* Wait for load of bootstrap uCode to finish */
 204         for (i = 0; i < 100; i++) {
 205                 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
 206                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
 207                         break;
 208                 udelay(10);
 209         }
 210         if (i < 100)
 211                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
 212         else {
 213                 IWL_ERROR("BSM write did not complete!\n");
 214                 return -EIO;
 215         }
 216
 217         /* Enable future boot loads whenever power management unit triggers it
 218          *   (e.g. when powering back up after power-save shutdown) */
 219         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
 220
 221         iwl_release_nic_access(priv);
 222
 223         return 0;
 224 }
 225
 226 /**
 227  * iwl4965_set_ucode_ptrs - Set uCode address location
 228  *
 229  * Tell initialization uCode where to find runtime uCode.
 230  *
 231  * BSM registers initially contain pointers to initialization uCode.
 232  * We need to replace them to load runtime uCode inst and data,
 233  * and to save runtime data when powering down.
 234  */
 235 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
 236 {
 237         dma_addr_t pinst;
 238         dma_addr_t pdata;
 239         unsigned long flags;
 240         int ret = 0;
 241
 242         /* bits 35:4 for 4965 */
 243         pinst = priv->ucode_code.p_addr >> 4;
 244         pdata = priv->ucode_data_backup.p_addr >> 4;
 245
 246         spin_lock_irqsave(&priv->lock, flags);
 247         ret = iwl_grab_nic_access(priv);
 248         if (ret) {
 249                 spin_unlock_irqrestore(&priv->lock, flags);
 250                 return ret;
 251         }
 252
 253         /* Tell bootstrap uCode where to find image to load */
 254         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 255         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 256         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
 257                                  priv->ucode_data.len);
 258
 259         /* Inst bytecount must be last to set up, bit 31 signals uCode
 260          *   that all new ptr/size info is in place */
 261         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
 262                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
 263         iwl_release_nic_access(priv);
 264
 265         spin_unlock_irqrestore(&priv->lock, flags);
 266
 267         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
 268
 269         return ret;
 270 }
 271
 272 /**
 273  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
 274  *
 275  * Called after REPLY_ALIVE notification received from "initialize" uCode.
 276  *
 277  * The 4965 "initialize" ALIVE reply contains calibration data for:
 278  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
 279  *   (3945 does not contain this data).
 280  *
 281  * Tell "initialize" uCode to go ahead and load the runtime uCode.
 282 */
 283 static void iwl4965_init_alive_start(struct iwl_priv *priv)
 284 {
 285         /* Check alive response for "valid" sign from uCode */
 286         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
 287                 /* We had an error bringing up the hardware, so take it
 288                  * all the way back down so we can try again */
 289                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
 290                 goto restart;
 291         }
 292
 293         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
 294          * This is a paranoid check, because we would not have gotten the
 295          * "initialize" alive if code weren't properly loaded.  */
 296         if (iwl_verify_ucode(priv)) {
 297                 /* Runtime instruction load was bad;
 298                  * take it all the way back down so we can try again */
 299                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
 300                 goto restart;
 301         }
 302
 303         /* Calculate temperature */
 304         priv->temperature = iwl4965_get_temperature(priv);
 305
 306         /* Send pointers to protocol/runtime uCode image ... init code will
 307          * load and launch runtime uCode, which will send us another "Alive"
 308          * notification. */
 309         IWL_DEBUG_INFO("Initialization Alive received.\n");
 310         if (iwl4965_set_ucode_ptrs(priv)) {
 311                 /* Runtime instruction load won't happen;
 312                  * take it all the way back down so we can try again */
 313                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
 314                 goto restart;
 315         }
 316         return;
 317
 318 restart:
 319         queue_work(priv->workqueue, &priv->restart);
 320 }
 321
 322 static int is_fat_channel(__le32 rxon_flags)
 323 {
 324         return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
 325                 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
 326 }
 327
 328 int iwl4965_hwrate_to_plcp_idx(u32 rate_n_flags)
 329 {
 330         int idx = 0;
 331
 332         /* 4965 HT rate format */
 333         if (rate_n_flags & RATE_MCS_HT_MSK) {
 334                 idx = (rate_n_flags & 0xff);
 335
 336                 if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 337                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 338
 339                 idx += IWL_FIRST_OFDM_RATE;
 340                 /* skip 9M not supported in ht*/
 341                 if (idx >= IWL_RATE_9M_INDEX)
 342                         idx += 1;
 343                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 344                         return idx;
 345
 346         /* 4965 legacy rate format, search for match in table */
 347         } else {
 348                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 349                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 350                                 return idx;
 351         }
 352
 353         return -1;
 354 }
 355
 356 /**
 357  * translate ucode response to mac80211 tx status control values
 358  */
 359 void iwl4965_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 360                                   struct ieee80211_tx_control *control)
 361 {
 362         int rate_index;
 363
 364         control->antenna_sel_tx =
 365                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 366         if (rate_n_flags & RATE_MCS_HT_MSK)
 367                 control->flags |= IEEE80211_TXCTL_OFDM_HT;
 368         if (rate_n_flags & RATE_MCS_GF_MSK)
 369                 control->flags |= IEEE80211_TXCTL_GREEN_FIELD;
 370         if (rate_n_flags & RATE_MCS_FAT_MSK)
 371                 control->flags |= IEEE80211_TXCTL_40_MHZ_WIDTH;
 372         if (rate_n_flags & RATE_MCS_DUP_MSK)
 373                 control->flags |= IEEE80211_TXCTL_DUP_DATA;
 374         if (rate_n_flags & RATE_MCS_SGI_MSK)
 375                 control->flags |= IEEE80211_TXCTL_SHORT_GI;
 376         /* since iwl4965_hwrate_to_plcp_idx is band indifferent, we always use
 377          * IEEE80211_BAND_2GHZ band as it contains all the rates */
 378         rate_index = iwl4965_hwrate_to_plcp_idx(rate_n_flags);
 379         if (rate_index == -1)
 380                 control->tx_rate = NULL;
 381         else
 382                 control->tx_rate =
 383                         &priv->bands[IEEE80211_BAND_2GHZ].bitrates[rate_index];
 384 }
 385
 386 int iwl4965_hw_rxq_stop(struct iwl_priv *priv)
 387 {
 388         int rc;
 389         unsigned long flags;
 390
 391         spin_lock_irqsave(&priv->lock, flags);
 392         rc = iwl_grab_nic_access(priv);
 393         if (rc) {
 394                 spin_unlock_irqrestore(&priv->lock, flags);
 395                 return rc;
 396         }
 397
 398         /* stop Rx DMA */
 399         iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
 400         rc = iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
 401                                      (1 << 24), 1000);
 402         if (rc < 0)
 403                 IWL_ERROR("Can't stop Rx DMA.\n");
 404
 405         iwl_release_nic_access(priv);
 406         spin_unlock_irqrestore(&priv->lock, flags);
 407
 408         return 0;
 409 }
 410
 411 /*
 412  * EEPROM handlers
 413  */
 414
 415 static int iwl4965_eeprom_check_version(struct iwl_priv *priv)
 416 {
 417         u16 eeprom_ver;
 418         u16 calib_ver;
 419
 420         eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
 421
 422         calib_ver = iwl_eeprom_query16(priv, EEPROM_4965_CALIB_VERSION_OFFSET);
 423
 424         if (eeprom_ver < EEPROM_4965_EEPROM_VERSION ||
 425             calib_ver < EEPROM_4965_TX_POWER_VERSION)
 426                 goto err;
 427
 428         return 0;
 429 err:
 430         IWL_ERROR("Unsuported EEPROM VER=0x%x < 0x%x CALIB=0x%x < 0x%x\n",
 431                   eeprom_ver, EEPROM_4965_EEPROM_VERSION,
 432                   calib_ver, EEPROM_4965_TX_POWER_VERSION);
 433         return -EINVAL;
 434
 435 }
 436 int iwl4965_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 437 {
 438         int ret;
 439         unsigned long flags;
 440
 441         spin_lock_irqsave(&priv->lock, flags);
 442         ret = iwl_grab_nic_access(priv);
 443         if (ret) {
 444                 spin_unlock_irqrestore(&priv->lock, flags);
 445                 return ret;
 446         }
 447
 448         if (src == IWL_PWR_SRC_VAUX) {
 449                 u32 val;
 450                 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
 451                                             &val);
 452
 453                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) {
 454                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 455                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 456                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 457                 }
 458         } else {
 459                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 460                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 461                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 462         }
 463
 464         iwl_release_nic_access(priv);
 465         spin_unlock_irqrestore(&priv->lock, flags);
 466
 467         return ret;
 468 }
 469
 470 static int iwl4965_disable_tx_fifo(struct iwl_priv *priv)
 471 {
 472         unsigned long flags;
 473         int ret;
 474
 475         spin_lock_irqsave(&priv->lock, flags);
 476
 477         ret = iwl_grab_nic_access(priv);
 478         if (unlikely(ret)) {
 479                 IWL_ERROR("Tx fifo reset failed");
 480                 spin_unlock_irqrestore(&priv->lock, flags);
 481                 return ret;
 482         }
 483
 484         iwl_write_prph(priv, IWL49_SCD_TXFACT, 0);
 485         iwl_release_nic_access(priv);
 486         spin_unlock_irqrestore(&priv->lock, flags);
 487
 488         return 0;
 489 }
 490
 491 static int iwl4965_apm_init(struct iwl_priv *priv)
 492 {
 493         int ret = 0;
 494
 495         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 496                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 497
 498         /* set "initialization complete" bit to move adapter
 499          * D0U* --> D0A* state */
 500         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 501
 502         /* wait for clock stabilization */
 503         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
 504                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 505                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 506         if (ret < 0) {
 507                 IWL_DEBUG_INFO("Failed to init the card\n");
 508                 goto out;
 509         }
 510
 511         ret = iwl_grab_nic_access(priv);
 512         if (ret)
 513                 goto out;
 514
 515         /* enable DMA */
 516         iwl_write_prph(priv, APMG_CLK_CTRL_REG,
 517                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
 518
 519         udelay(20);
 520
 521         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 522                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 523
 524         iwl_release_nic_access(priv);
 525 out:
 526         return ret;
 527 }
 528
 529
 530 static void iwl4965_nic_config(struct iwl_priv *priv)
 531 {
 532         unsigned long flags;
 533         u32 val;
 534         u16 radio_cfg;
 535         u8 val_link;
 536
 537         spin_lock_irqsave(&priv->lock, flags);
 538
 539         if ((priv->rev_id & 0x80) == 0x80 && (priv->rev_id & 0x7f) < 8) {
 540                 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 541                 /* Enable No Snoop field */
 542                 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
 543                                        val & ~(1 << 11));
 544         }
 545
 546         pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
 547
 548         /* disable L1 entry -- workaround for pre-B1 */
 549         pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
 550
 551         radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
 552
 553         /* write radio config values to register */
 554         if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) == EEPROM_4965_RF_CFG_TYPE_MAX)
 555                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 556                             EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
 557                             EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
 558                             EEPROM_RF_CFG_DASH_MSK(radio_cfg));
 559
 560         /* set CSR_HW_CONFIG_REG for uCode use */
 561         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 562                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 563                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
 564
 565         priv->calib_info = (struct iwl_eeprom_calib_info *)
 566                 iwl_eeprom_query_addr(priv, EEPROM_4965_CALIB_TXPOWER_OFFSET);
 567
 568         spin_unlock_irqrestore(&priv->lock, flags);
 569 }
 570
 571 int iwl4965_hw_nic_stop_master(struct iwl_priv *priv)
 572 {
 573         int rc = 0;
 574         u32 reg_val;
 575         unsigned long flags;
 576
 577         spin_lock_irqsave(&priv->lock, flags);
 578
 579         /* set stop master bit */
 580         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 581
 582         reg_val = iwl_read32(priv, CSR_GP_CNTRL);
 583
 584         if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
 585             (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
 586                 IWL_DEBUG_INFO("Card in power save, master is already "
 587                                "stopped\n");
 588         else {
 589                 rc = iwl_poll_bit(priv, CSR_RESET,
 590                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
 591                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 592                 if (rc < 0) {
 593                         spin_unlock_irqrestore(&priv->lock, flags);
 594                         return rc;
 595                 }
 596         }
 597
 598         spin_unlock_irqrestore(&priv->lock, flags);
 599         IWL_DEBUG_INFO("stop master\n");
 600
 601         return rc;
 602 }
 603
 604 /**
 605  * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
 606  */
 607 void iwl4965_hw_txq_ctx_stop(struct iwl_priv *priv)
 608 {
 609
 610         int txq_id;
 611         unsigned long flags;
 612
 613         /* Stop each Tx DMA channel, and wait for it to be idle */
 614         for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) {
 615                 spin_lock_irqsave(&priv->lock, flags);
 616                 if (iwl_grab_nic_access(priv)) {
 617                         spin_unlock_irqrestore(&priv->lock, flags);
 618                         continue;
 619                 }
 620
 621                 iwl_write_direct32(priv,
 622                                    FH_TCSR_CHNL_TX_CONFIG_REG(txq_id), 0x0);
 623                 iwl_poll_direct_bit(priv, FH_TSSR_TX_STATUS_REG,
 624                                     FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
 625                                     (txq_id), 200);
 626                 iwl_release_nic_access(priv);
 627                 spin_unlock_irqrestore(&priv->lock, flags);
 628         }
 629
 630         /* Deallocate memory for all Tx queues */
 631         iwl_hw_txq_ctx_free(priv);
 632 }
 633
 634 int iwl4965_hw_nic_reset(struct iwl_priv *priv)
 635 {
 636         int rc = 0;
 637         unsigned long flags;
 638
 639         iwl4965_hw_nic_stop_master(priv);
 640
 641         spin_lock_irqsave(&priv->lock, flags);
 642
 643         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 644
 645         udelay(10);
 646
 647         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 648         rc = iwl_poll_bit(priv, CSR_RESET,
 649                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 650                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
 651
 652         udelay(10);
 653
 654         rc = iwl_grab_nic_access(priv);
 655         if (!rc) {
 656                 iwl_write_prph(priv, APMG_CLK_EN_REG,
 657                                 APMG_CLK_VAL_DMA_CLK_RQT |
 658                                 APMG_CLK_VAL_BSM_CLK_RQT);
 659
 660                 udelay(10);
 661
 662                 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 663                                         APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 664
 665                 iwl_release_nic_access(priv);
 666         }
 667
 668         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 669         wake_up_interruptible(&priv->wait_command_queue);
 670
 671         spin_unlock_irqrestore(&priv->lock, flags);
 672
 673         return rc;
 674
 675 }
 676
 677 #define REG_RECALIB_PERIOD (60)
 678
 679 /**
 680  * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
 681  *
 682  * This callback is provided in order to send a statistics request.
 683  *
 684  * This timer function is continually reset to execute within
 685  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 686  * was received.  We need to ensure we receive the statistics in order
 687  * to update the temperature used for calibrating the TXPOWER.
 688  */
 689 static void iwl4965_bg_statistics_periodic(unsigned long data)
 690 {
 691         struct iwl_priv *priv = (struct iwl_priv *)data;
 692
 693         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 694                 return;
 695
 696         iwl_send_statistics_request(priv, CMD_ASYNC);
 697 }
 698
 699 void iwl4965_rf_kill_ct_config(struct iwl_priv *priv)
 700 {
 701         struct iwl4965_ct_kill_config cmd;
 702         unsigned long flags;
 703         int ret = 0;
 704
 705         spin_lock_irqsave(&priv->lock, flags);
 706         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 707                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 708         spin_unlock_irqrestore(&priv->lock, flags);
 709
 710         cmd.critical_temperature_R =
 711                 cpu_to_le32(priv->hw_params.ct_kill_threshold);
 712
 713         ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
 714                                sizeof(cmd), &cmd);
 715         if (ret)
 716                 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
 717         else
 718                 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded, "
 719                         "critical temperature is %d\n",
 720                         cmd.critical_temperature_R);
 721 }
 722
 723 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
 724
 725 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
 726  * Called after every association, but this runs only once!
 727  *  ... once chain noise is calibrated the first time, it's good forever.  */
 728 static void iwl4965_chain_noise_reset(struct iwl_priv *priv)
 729 {
 730         struct iwl_chain_noise_data *data = &(priv->chain_noise_data);
 731
 732         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
 733                 struct iwl4965_calibration_cmd cmd;
 734
 735                 memset(&cmd, 0, sizeof(cmd));
 736                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
 737                 cmd.diff_gain_a = 0;
 738                 cmd.diff_gain_b = 0;
 739                 cmd.diff_gain_c = 0;
 740                 if (iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 741                                  sizeof(cmd), &cmd))
 742                         IWL_ERROR("Could not send REPLY_PHY_CALIBRATION_CMD\n");
 743                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
 744                 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
 745         }
 746 }
 747
 748 static void iwl4965_gain_computation(struct iwl_priv *priv,
 749                 u32 *average_noise,
 750                 u16 min_average_noise_antenna_i,
 751                 u32 min_average_noise)
 752 {
 753         int i, ret;
 754         struct iwl_chain_noise_data *data = &priv->chain_noise_data;
 755
 756         data->delta_gain_code[min_average_noise_antenna_i] = 0;
 757
 758         for (i = 0; i < NUM_RX_CHAINS; i++) {
 759                 s32 delta_g = 0;
 760
 761                 if (!(data->disconn_array[i]) &&
 762                     (data->delta_gain_code[i] ==
 763                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
 764                         delta_g = average_noise[i] - min_average_noise;
 765                         data->delta_gain_code[i] = (u8)((delta_g * 10) / 15);
 766                         data->delta_gain_code[i] =
 767                                 min(data->delta_gain_code[i],
 768                                 (u8) CHAIN_NOISE_MAX_DELTA_GAIN_CODE);
 769
 770                         data->delta_gain_code[i] =
 771                                 (data->delta_gain_code[i] | (1 << 2));
 772                 } else {
 773                         data->delta_gain_code[i] = 0;
 774                 }
 775         }
 776         IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
 777                      data->delta_gain_code[0],
 778                      data->delta_gain_code[1],
 779                      data->delta_gain_code[2]);
 780
 781         /* Differential gain gets sent to uCode only once */
 782         if (!data->radio_write) {
 783                 struct iwl4965_calibration_cmd cmd;
 784                 data->radio_write = 1;
 785
 786                 memset(&cmd, 0, sizeof(cmd));
 787                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
 788                 cmd.diff_gain_a = data->delta_gain_code[0];
 789                 cmd.diff_gain_b = data->delta_gain_code[1];
 790                 cmd.diff_gain_c = data->delta_gain_code[2];
 791                 ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 792                                       sizeof(cmd), &cmd);
 793                 if (ret)
 794                         IWL_DEBUG_CALIB("fail sending cmd "
 795                                      "REPLY_PHY_CALIBRATION_CMD \n");
 796
 797                 /* TODO we might want recalculate
 798                  * rx_chain in rxon cmd */
 799
 800                 /* Mark so we run this algo only once! */
 801                 data->state = IWL_CHAIN_NOISE_CALIBRATED;
 802         }
 803         data->chain_noise_a = 0;
 804         data->chain_noise_b = 0;
 805         data->chain_noise_c = 0;
 806         data->chain_signal_a = 0;
 807         data->chain_signal_b = 0;
 808         data->chain_signal_c = 0;
 809         data->beacon_count = 0;
 810 }
 811
 812 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
 813 {
 814         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 815                         sensitivity_work);
 816
 817         mutex_lock(&priv->mutex);
 818
 819         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 820             test_bit(STATUS_SCANNING, &priv->status)) {
 821                 mutex_unlock(&priv->mutex);
 822                 return;
 823         }
 824
 825         if (priv->start_calib) {
 826                 iwl_chain_noise_calibration(priv, &priv->statistics);
 827
 828                 iwl_sensitivity_calibration(priv, &priv->statistics);
 829         }
 830
 831         mutex_unlock(&priv->mutex);
 832         return;
 833 }
 834 #endif /*CONFIG_IWL4965_RUN_TIME_CALIB*/
 835
 836 static void iwl4965_bg_txpower_work(struct work_struct *work)
 837 {
 838         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 839                         txpower_work);
 840
 841         /* If a scan happened to start before we got here
 842          * then just return; the statistics notification will
 843          * kick off another scheduled work to compensate for
 844          * any temperature delta we missed here. */
 845         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 846             test_bit(STATUS_SCANNING, &priv->status))
 847                 return;
 848
 849         mutex_lock(&priv->mutex);
 850
 851         /* Regardless of if we are assocaited, we must reconfigure the
 852          * TX power since frames can be sent on non-radar channels while
 853          * not associated */
 854         iwl4965_hw_reg_send_txpower(priv);
 855
 856         /* Update last_temperature to keep is_calib_needed from running
 857          * when it isn't needed... */
 858         priv->last_temperature = priv->temperature;
 859
 860         mutex_unlock(&priv->mutex);
 861 }
 862
 863 /*
 864  * Acquire priv->lock before calling this function !
 865  */
 866 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
 867 {
 868         iwl_write_direct32(priv, HBUS_TARG_WRPTR,
 869                              (index & 0xff) | (txq_id << 8));
 870         iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(txq_id), index);
 871 }
 872
 873 /**
 874  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
 875  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
 876  * @scd_retry: (1) Indicates queue will be used in aggregation mode
 877  *
 878  * NOTE:  Acquire priv->lock before calling this function !
 879  */
 880 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
 881                                         struct iwl_tx_queue *txq,
 882                                         int tx_fifo_id, int scd_retry)
 883 {
 884         int txq_id = txq->q.id;
 885
 886         /* Find out whether to activate Tx queue */
 887         int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
 888
 889         /* Set up and activate */
 890         iwl_write_prph(priv, IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
 891                          (active << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
 892                          (tx_fifo_id << IWL49_SCD_QUEUE_STTS_REG_POS_TXF) |
 893                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_WSL) |
 894                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
 895                          IWL49_SCD_QUEUE_STTS_REG_MSK);
 896
 897         txq->sched_retry = scd_retry;
 898
 899         IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
 900                        active ? "Activate" : "Deactivate",
 901                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
 902 }
 903
 904 static const u16 default_queue_to_tx_fifo[] = {
 905         IWL_TX_FIFO_AC3,
 906         IWL_TX_FIFO_AC2,
 907         IWL_TX_FIFO_AC1,
 908         IWL_TX_FIFO_AC0,
 909         IWL49_CMD_FIFO_NUM,
 910         IWL_TX_FIFO_HCCA_1,
 911         IWL_TX_FIFO_HCCA_2
 912 };
 913
 914 static inline void iwl4965_txq_ctx_activate(struct iwl_priv *priv, int txq_id)
 915 {
 916         set_bit(txq_id, &priv->txq_ctx_active_msk);
 917 }
 918
 919 static inline void iwl4965_txq_ctx_deactivate(struct iwl_priv *priv, int txq_id)
 920 {
 921         clear_bit(txq_id, &priv->txq_ctx_active_msk);
 922 }
 923
 924 int iwl4965_alive_notify(struct iwl_priv *priv)
 925 {
 926         u32 a;
 927         int i = 0;
 928         unsigned long flags;
 929         int ret;
 930
 931         spin_lock_irqsave(&priv->lock, flags);
 932
 933 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
 934         memset(&(priv->sensitivity_data), 0,
 935                sizeof(struct iwl_sensitivity_data));
 936         memset(&(priv->chain_noise_data), 0,
 937                sizeof(struct iwl_chain_noise_data));
 938         for (i = 0; i < NUM_RX_CHAINS; i++)
 939                 priv->chain_noise_data.delta_gain_code[i] =
 940                                 CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
 941 #endif /* CONFIG_IWL4965_RUN_TIME_CALIB*/
 942         ret = iwl_grab_nic_access(priv);
 943         if (ret) {
 944                 spin_unlock_irqrestore(&priv->lock, flags);
 945                 return ret;
 946         }
 947
 948         /* Clear 4965's internal Tx Scheduler data base */
 949         priv->scd_base_addr = iwl_read_prph(priv, IWL49_SCD_SRAM_BASE_ADDR);
 950         a = priv->scd_base_addr + IWL49_SCD_CONTEXT_DATA_OFFSET;
 951         for (; a < priv->scd_base_addr + IWL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
 952                 iwl_write_targ_mem(priv, a, 0);
 953         for (; a < priv->scd_base_addr + IWL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
 954                 iwl_write_targ_mem(priv, a, 0);
 955         for (; a < sizeof(u16) * priv->hw_params.max_txq_num; a += 4)
 956                 iwl_write_targ_mem(priv, a, 0);
 957
 958         /* Tel 4965 where to find Tx byte count tables */
 959         iwl_write_prph(priv, IWL49_SCD_DRAM_BASE_ADDR,
 960                 (priv->shared_phys +
 961                  offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
 962
 963         /* Disable chain mode for all queues */
 964         iwl_write_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, 0);
 965
 966         /* Initialize each Tx queue (including the command queue) */
 967         for (i = 0; i < priv->hw_params.max_txq_num; i++) {
 968
 969                 /* TFD circular buffer read/write indexes */
 970                 iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(i), 0);
 971                 iwl_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
 972
 973                 /* Max Tx Window size for Scheduler-ACK mode */
 974                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 975                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i),
 976                                 (SCD_WIN_SIZE <<
 977                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
 978                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
 979
 980                 /* Frame limit */
 981                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 982                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
 983                                 sizeof(u32),
 984                                 (SCD_FRAME_LIMIT <<
 985                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
 986                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
 987
 988         }
 989         iwl_write_prph(priv, IWL49_SCD_INTERRUPT_MASK,
 990                                  (1 << priv->hw_params.max_txq_num) - 1);
 991
 992         /* Activate all Tx DMA/FIFO channels */
 993         iwl_write_prph(priv, IWL49_SCD_TXFACT,
 994                                  SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
 995
 996         iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
 997
 998         /* Map each Tx/cmd queue to its corresponding fifo */
 999         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
1000                 int ac = default_queue_to_tx_fifo[i];
1001                 iwl4965_txq_ctx_activate(priv, i);
1002                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
1003         }
1004
1005         iwl_release_nic_access(priv);
1006         spin_unlock_irqrestore(&priv->lock, flags);
1007
1008         /* Ask for statistics now, the uCode will send statistics notification
1009          * periodically after association */
1010         iwl_send_statistics_request(priv, CMD_ASYNC);
1011         return ret;
1012 }
1013
1014 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
1015 static struct iwl_sensitivity_ranges iwl4965_sensitivity = {
1016         .min_nrg_cck = 97,
1017         .max_nrg_cck = 0,
1018
1019         .auto_corr_min_ofdm = 85,
1020         .auto_corr_min_ofdm_mrc = 170,
1021         .auto_corr_min_ofdm_x1 = 105,
1022         .auto_corr_min_ofdm_mrc_x1 = 220,
1023
1024         .auto_corr_max_ofdm = 120,
1025         .auto_corr_max_ofdm_mrc = 210,
1026         .auto_corr_max_ofdm_x1 = 140,
1027         .auto_corr_max_ofdm_mrc_x1 = 270,
1028
1029         .auto_corr_min_cck = 125,
1030         .auto_corr_max_cck = 200,
1031         .auto_corr_min_cck_mrc = 200,
1032         .auto_corr_max_cck_mrc = 400,
1033
1034         .nrg_th_cck = 100,
1035         .nrg_th_ofdm = 100,
1036 };
1037 #endif
1038
1039 /**
1040  * iwl4965_hw_set_hw_params
1041  *
1042  * Called when initializing driver
1043  */
1044 int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
1045 {
1046
1047         if ((priv->cfg->mod_params->num_of_queues > IWL49_NUM_QUEUES) ||
1048             (priv->cfg->mod_params->num_of_queues < IWL_MIN_NUM_QUEUES)) {
1049                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
1050                           IWL_MIN_NUM_QUEUES, IWL49_NUM_QUEUES);
1051                 return -EINVAL;
1052         }
1053
1054         priv->hw_params.max_txq_num = priv->cfg->mod_params->num_of_queues;
1055         priv->hw_params.sw_crypto = priv->cfg->mod_params->sw_crypto;
1056         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1057         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1058         if (priv->cfg->mod_params->amsdu_size_8K)
1059                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1060         else
1061                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1062         priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
1063         priv->hw_params.max_stations = IWL4965_STATION_COUNT;
1064         priv->hw_params.bcast_sta_id = IWL4965_BROADCAST_ID;
1065
1066         priv->hw_params.max_data_size = IWL49_RTC_DATA_SIZE;
1067         priv->hw_params.max_inst_size = IWL49_RTC_INST_SIZE;
1068         priv->hw_params.max_bsm_size = BSM_SRAM_SIZE;
1069         priv->hw_params.fat_channel = BIT(IEEE80211_BAND_5GHZ);
1070
1071         priv->hw_params.tx_chains_num = 2;
1072         priv->hw_params.rx_chains_num = 2;
1073         priv->hw_params.valid_tx_ant = ANT_A | ANT_B;
1074         priv->hw_params.valid_rx_ant = ANT_A | ANT_B;
1075         priv->hw_params.ct_kill_threshold = CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD);
1076
1077 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
1078         priv->hw_params.sens = &iwl4965_sensitivity;
1079 #endif
1080
1081         return 0;
1082 }
1083
1084 /* set card power command */
1085 static int iwl4965_set_power(struct iwl_priv *priv,
1086                       void *cmd)
1087 {
1088         int ret = 0;
1089
1090         ret = iwl_send_cmd_pdu_async(priv, POWER_TABLE_CMD,
1091                                     sizeof(struct iwl4965_powertable_cmd),
1092                                     cmd, NULL);
1093         return ret;
1094 }
1095 int iwl4965_hw_reg_set_txpower(struct iwl_priv *priv, s8 power)
1096 {
1097         IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
1098         return -EINVAL;
1099 }
1100
1101 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
1102 {
1103         s32 sign = 1;
1104
1105         if (num < 0) {
1106                 sign = -sign;
1107                 num = -num;
1108         }
1109         if (denom < 0) {
1110                 sign = -sign;
1111                 denom = -denom;
1112         }
1113         *res = 1;
1114         *res = ((num * 2 + denom) / (denom * 2)) * sign;
1115
1116         return 1;
1117 }
1118
1119 /**
1120  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
1121  *
1122  * Determines power supply voltage compensation for txpower calculations.
1123  * Returns number of 1/2-dB steps to subtract from gain table index,
1124  * to compensate for difference between power supply voltage during
1125  * factory measurements, vs. current power supply voltage.
1126  *
1127  * Voltage indication is higher for lower voltage.
1128  * Lower voltage requires more gain (lower gain table index).
1129  */
1130 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
1131                                             s32 current_voltage)
1132 {
1133         s32 comp = 0;
1134
1135         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
1136             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
1137                 return 0;
1138
1139         iwl4965_math_div_round(current_voltage - eeprom_voltage,
1140                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
1141
1142         if (current_voltage > eeprom_voltage)
1143                 comp *= 2;
1144         if ((comp < -2) || (comp > 2))
1145                 comp = 0;
1146
1147         return comp;
1148 }
1149
1150 static const struct iwl_channel_info *
1151 iwl4965_get_channel_txpower_info(struct iwl_priv *priv,
1152                                  enum ieee80211_band band, u16 channel)
1153 {
1154         const struct iwl_channel_info *ch_info;
1155
1156         ch_info = iwl_get_channel_info(priv, band, channel);
1157
1158         if (!is_channel_valid(ch_info))
1159                 return NULL;
1160
1161         return ch_info;
1162 }
1163
1164 static s32 iwl4965_get_tx_atten_grp(u16 channel)
1165 {
1166         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
1167             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
1168                 return CALIB_CH_GROUP_5;
1169
1170         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
1171             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
1172                 return CALIB_CH_GROUP_1;
1173
1174         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
1175             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
1176                 return CALIB_CH_GROUP_2;
1177
1178         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
1179             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
1180                 return CALIB_CH_GROUP_3;
1181
1182         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
1183             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
1184                 return CALIB_CH_GROUP_4;
1185
1186         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
1187         return -1;
1188 }
1189
1190 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
1191 {
1192         s32 b = -1;
1193
1194         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
1195                 if (priv->calib_info->band_info[b].ch_from == 0)
1196                         continue;
1197
1198                 if ((channel >= priv->calib_info->band_info[b].ch_from)
1199                     && (channel <= priv->calib_info->band_info[b].ch_to))
1200                         break;
1201         }
1202
1203         return b;
1204 }
1205
1206 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
1207 {
1208         s32 val;
1209
1210         if (x2 == x1)
1211                 return y1;
1212         else {
1213                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
1214                 return val + y2;
1215         }
1216 }
1217
1218 /**
1219  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
1220  *
1221  * Interpolates factory measurements from the two sample channels within a
1222  * sub-band, to apply to channel of interest.  Interpolation is proportional to
1223  * differences in channel frequencies, which is proportional to differences
1224  * in channel number.
1225  */
1226 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
1227                                     struct iwl_eeprom_calib_ch_info *chan_info)
1228 {
1229         s32 s = -1;
1230         u32 c;
1231         u32 m;
1232         const struct iwl_eeprom_calib_measure *m1;
1233         const struct iwl_eeprom_calib_measure *m2;
1234         struct iwl_eeprom_calib_measure *omeas;
1235         u32 ch_i1;
1236         u32 ch_i2;
1237
1238         s = iwl4965_get_sub_band(priv, channel);
1239         if (s >= EEPROM_TX_POWER_BANDS) {
1240                 IWL_ERROR("Tx Power can not find channel %d ", channel);
1241                 return -1;
1242         }
1243
1244         ch_i1 = priv->calib_info->band_info[s].ch1.ch_num;
1245         ch_i2 = priv->calib_info->band_info[s].ch2.ch_num;
1246         chan_info->ch_num = (u8) channel;
1247
1248         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
1249                           channel, s, ch_i1, ch_i2);
1250
1251         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
1252                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
1253                         m1 = &(priv->calib_info->band_info[s].ch1.
1254                                measurements[c][m]);
1255                         m2 = &(priv->calib_info->band_info[s].ch2.
1256                                measurements[c][m]);
1257                         omeas = &(chan_info->measurements[c][m]);
1258
1259                         omeas->actual_pow =
1260                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1261                                                            m1->actual_pow,
1262                                                            ch_i2,
1263                                                            m2->actual_pow);
1264                         omeas->gain_idx =
1265                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1266                                                            m1->gain_idx, ch_i2,
1267                                                            m2->gain_idx);
1268                         omeas->temperature =
1269                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1270                                                            m1->temperature,
1271                                                            ch_i2,
1272                                                            m2->temperature);
1273                         omeas->pa_det =
1274                             (s8) iwl4965_interpolate_value(channel, ch_i1,
1275                                                            m1->pa_det, ch_i2,
1276                                                            m2->pa_det);
1277
1278                         IWL_DEBUG_TXPOWER
1279                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
1280                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
1281                         IWL_DEBUG_TXPOWER
1282                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
1283                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
1284                         IWL_DEBUG_TXPOWER
1285                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
1286                              m1->pa_det, m2->pa_det, omeas->pa_det);
1287                         IWL_DEBUG_TXPOWER
1288                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
1289                              m1->temperature, m2->temperature,
1290                              omeas->temperature);
1291                 }
1292         }
1293
1294         return 0;
1295 }
1296
1297 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
1298  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
1299 static s32 back_off_table[] = {
1300         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
1301         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
1302         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
1303         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
1304         10                      /* CCK */
1305 };
1306
1307 /* Thermal compensation values for txpower for various frequency ranges ...
1308  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
1309 static struct iwl4965_txpower_comp_entry {
1310         s32 degrees_per_05db_a;
1311         s32 degrees_per_05db_a_denom;
1312 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
1313         {9, 2},                 /* group 0 5.2, ch  34-43 */
1314         {4, 1},                 /* group 1 5.2, ch  44-70 */
1315         {4, 1},                 /* group 2 5.2, ch  71-124 */
1316         {4, 1},                 /* group 3 5.2, ch 125-200 */
1317         {3, 1}                  /* group 4 2.4, ch   all */
1318 };
1319
1320 static s32 get_min_power_index(s32 rate_power_index, u32 band)
1321 {
1322         if (!band) {
1323                 if ((rate_power_index & 7) <= 4)
1324                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
1325         }
1326         return MIN_TX_GAIN_INDEX;
1327 }
1328
1329 struct gain_entry {
1330         u8 dsp;
1331         u8 radio;
1332 };
1333
1334 static const struct gain_entry gain_table[2][108] = {
1335         /* 5.2GHz power gain index table */
1336         {
1337          {123, 0x3F},           /* highest txpower */
1338          {117, 0x3F},
1339          {110, 0x3F},
1340          {104, 0x3F},
1341          {98, 0x3F},
1342          {110, 0x3E},
1343          {104, 0x3E},
1344          {98, 0x3E},
1345          {110, 0x3D},
1346          {104, 0x3D},
1347          {98, 0x3D},
1348          {110, 0x3C},
1349          {104, 0x3C},
1350          {98, 0x3C},
1351          {110, 0x3B},
1352          {104, 0x3B},
1353          {98, 0x3B},
1354          {110, 0x3A},
1355          {104, 0x3A},
1356          {98, 0x3A},
1357          {110, 0x39},
1358          {104, 0x39},
1359          {98, 0x39},
1360          {110, 0x38},
1361          {104, 0x38},
1362          {98, 0x38},
1363          {110, 0x37},
1364          {104, 0x37},
1365          {98, 0x37},
1366          {110, 0x36},
1367          {104, 0x36},
1368          {98, 0x36},
1369          {110, 0x35},
1370          {104, 0x35},
1371          {98, 0x35},
1372          {110, 0x34},
1373          {104, 0x34},
1374          {98, 0x34},
1375          {110, 0x33},
1376          {104, 0x33},
1377          {98, 0x33},
1378          {110, 0x32},
1379          {104, 0x32},
1380          {98, 0x32},
1381          {110, 0x31},
1382          {104, 0x31},
1383          {98, 0x31},
1384          {110, 0x30},
1385          {104, 0x30},
1386          {98, 0x30},
1387          {110, 0x25},
1388          {104, 0x25},
1389          {98, 0x25},
1390          {110, 0x24},
1391          {104, 0x24},
1392          {98, 0x24},
1393          {110, 0x23},
1394          {104, 0x23},
1395          {98, 0x23},
1396          {110, 0x22},
1397          {104, 0x18},
1398          {98, 0x18},
1399          {110, 0x17},
1400          {104, 0x17},
1401          {98, 0x17},
1402          {110, 0x16},
1403          {104, 0x16},
1404          {98, 0x16},
1405          {110, 0x15},
1406          {104, 0x15},
1407          {98, 0x15},
1408          {110, 0x14},
1409          {104, 0x14},
1410          {98, 0x14},
1411          {110, 0x13},
1412          {104, 0x13},
1413          {98, 0x13},
1414          {110, 0x12},
1415          {104, 0x08},
1416          {98, 0x08},
1417          {110, 0x07},
1418          {104, 0x07},
1419          {98, 0x07},
1420          {110, 0x06},
1421          {104, 0x06},
1422          {98, 0x06},
1423          {110, 0x05},
1424          {104, 0x05},
1425          {98, 0x05},
1426          {110, 0x04},
1427          {104, 0x04},
1428          {98, 0x04},
1429          {110, 0x03},
1430          {104, 0x03},
1431          {98, 0x03},
1432          {110, 0x02},
1433          {104, 0x02},
1434          {98, 0x02},
1435          {110, 0x01},
1436          {104, 0x01},
1437          {98, 0x01},
1438          {110, 0x00},
1439          {104, 0x00},
1440          {98, 0x00},
1441          {93, 0x00},
1442          {88, 0x00},
1443          {83, 0x00},
1444          {78, 0x00},
1445          },
1446         /* 2.4GHz power gain index table */
1447         {
1448          {110, 0x3f},           /* highest txpower */
1449          {104, 0x3f},
1450          {98, 0x3f},
1451          {110, 0x3e},
1452          {104, 0x3e},
1453          {98, 0x3e},
1454          {110, 0x3d},
1455          {104, 0x3d},
1456          {98, 0x3d},
1457          {110, 0x3c},
1458          {104, 0x3c},
1459          {98, 0x3c},
1460          {110, 0x3b},
1461          {104, 0x3b},
1462          {98, 0x3b},
1463          {110, 0x3a},
1464          {104, 0x3a},
1465          {98, 0x3a},
1466          {110, 0x39},
1467          {104, 0x39},
1468          {98, 0x39},
1469          {110, 0x38},
1470          {104, 0x38},
1471          {98, 0x38},
1472          {110, 0x37},
1473          {104, 0x37},
1474          {98, 0x37},
1475          {110, 0x36},
1476          {104, 0x36},
1477          {98, 0x36},
1478          {110, 0x35},
1479          {104, 0x35},
1480          {98, 0x35},
1481          {110, 0x34},
1482          {104, 0x34},
1483          {98, 0x34},
1484          {110, 0x33},
1485          {104, 0x33},
1486          {98, 0x33},
1487          {110, 0x32},
1488          {104, 0x32},
1489          {98, 0x32},
1490          {110, 0x31},
1491          {104, 0x31},
1492          {98, 0x31},
1493          {110, 0x30},
1494          {104, 0x30},
1495          {98, 0x30},
1496          {110, 0x6},
1497          {104, 0x6},
1498          {98, 0x6},
1499          {110, 0x5},
1500          {104, 0x5},
1501          {98, 0x5},
1502          {110, 0x4},
1503          {104, 0x4},
1504          {98, 0x4},
1505          {110, 0x3},
1506          {104, 0x3},
1507          {98, 0x3},
1508          {110, 0x2},
1509          {104, 0x2},
1510          {98, 0x2},
1511          {110, 0x1},
1512          {104, 0x1},
1513          {98, 0x1},
1514          {110, 0x0},
1515          {104, 0x0},
1516          {98, 0x0},
1517          {97, 0},
1518          {96, 0},
1519          {95, 0},
1520          {94, 0},
1521          {93, 0},
1522          {92, 0},
1523          {91, 0},
1524          {90, 0},
1525          {89, 0},
1526          {88, 0},
1527          {87, 0},
1528          {86, 0},
1529          {85, 0},
1530          {84, 0},
1531          {83, 0},
1532          {82, 0},
1533          {81, 0},
1534          {80, 0},
1535          {79, 0},
1536          {78, 0},
1537          {77, 0},
1538          {76, 0},
1539          {75, 0},
1540          {74, 0},
1541          {73, 0},
1542          {72, 0},
1543          {71, 0},
1544          {70, 0},
1545          {69, 0},
1546          {68, 0},
1547          {67, 0},
1548          {66, 0},
1549          {65, 0},
1550          {64, 0},
1551          {63, 0},
1552          {62, 0},
1553          {61, 0},
1554          {60, 0},
1555          {59, 0},
1556          }
1557 };
1558
1559 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
1560                                     u8 is_fat, u8 ctrl_chan_high,
1561                                     struct iwl4965_tx_power_db *tx_power_tbl)
1562 {
1563         u8 saturation_power;
1564         s32 target_power;
1565         s32 user_target_power;
1566         s32 power_limit;
1567         s32 current_temp;
1568         s32 reg_limit;
1569         s32 current_regulatory;
1570         s32 txatten_grp = CALIB_CH_GROUP_MAX;
1571         int i;
1572         int c;
1573         const struct iwl_channel_info *ch_info = NULL;
1574         struct iwl_eeprom_calib_ch_info ch_eeprom_info;
1575         const struct iwl_eeprom_calib_measure *measurement;
1576         s16 voltage;
1577         s32 init_voltage;
1578         s32 voltage_compensation;
1579         s32 degrees_per_05db_num;
1580         s32 degrees_per_05db_denom;
1581         s32 factory_temp;
1582         s32 temperature_comp[2];
1583         s32 factory_gain_index[2];
1584         s32 factory_actual_pwr[2];
1585         s32 power_index;
1586
1587         /* Sanity check requested level (dBm) */
1588         if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
1589                 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
1590                             priv->user_txpower_limit);
1591                 return -EINVAL;
1592         }
1593         if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
1594                 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
1595                             priv->user_txpower_limit);
1596                 return -EINVAL;
1597         }
1598
1599         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
1600          *   are used for indexing into txpower table) */
1601         user_target_power = 2 * priv->user_txpower_limit;
1602
1603         /* Get current (RXON) channel, band, width */
1604         ch_info =
1605                 iwl4965_get_channel_txpower_info(priv, priv->band, channel);
1606
1607         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
1608                           is_fat);
1609
1610         if (!ch_info)
1611                 return -EINVAL;
1612
1613         /* get txatten group, used to select 1) thermal txpower adjustment
1614          *   and 2) mimo txpower balance between Tx chains. */
1615         txatten_grp = iwl4965_get_tx_atten_grp(channel);
1616         if (txatten_grp < 0)
1617                 return -EINVAL;
1618
1619         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
1620                           channel, txatten_grp);
1621
1622         if (is_fat) {
1623                 if (ctrl_chan_high)
1624                         channel -= 2;
1625                 else
1626                         channel += 2;
1627         }
1628
1629         /* hardware txpower limits ...
1630          * saturation (clipping distortion) txpowers are in half-dBm */
1631         if (band)
1632                 saturation_power = priv->calib_info->saturation_power24;
1633         else
1634                 saturation_power = priv->calib_info->saturation_power52;
1635
1636         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
1637             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
1638                 if (band)
1639                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
1640                 else
1641                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
1642         }
1643
1644         /* regulatory txpower limits ... reg_limit values are in half-dBm,
1645          *   max_power_avg values are in dBm, convert * 2 */
1646         if (is_fat)
1647                 reg_limit = ch_info->fat_max_power_avg * 2;
1648         else
1649                 reg_limit = ch_info->max_power_avg * 2;
1650
1651         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
1652             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
1653                 if (band)
1654                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
1655                 else
1656                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
1657         }
1658
1659         /* Interpolate txpower calibration values for this channel,
1660          *   based on factory calibration tests on spaced channels. */
1661         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
1662
1663         /* calculate tx gain adjustment based on power supply voltage */
1664         voltage = priv->calib_info->voltage;
1665         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
1666         voltage_compensation =
1667             iwl4965_get_voltage_compensation(voltage, init_voltage);
1668
1669         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
1670                           init_voltage,
1671                           voltage, voltage_compensation);
1672
1673         /* get current temperature (Celsius) */
1674         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
1675         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
1676         current_temp = KELVIN_TO_CELSIUS(current_temp);
1677
1678         /* select thermal txpower adjustment params, based on channel group
1679          *   (same frequency group used for mimo txatten adjustment) */
1680         degrees_per_05db_num =
1681             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
1682         degrees_per_05db_denom =
1683             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
1684
1685         /* get per-chain txpower values from factory measurements */
1686         for (c = 0; c < 2; c++) {
1687                 measurement = &ch_eeprom_info.measurements[c][1];
1688
1689                 /* txgain adjustment (in half-dB steps) based on difference
1690                  *   between factory and current temperature */
1691                 factory_temp = measurement->temperature;
1692                 iwl4965_math_div_round((current_temp - factory_temp) *
1693                                        degrees_per_05db_denom,
1694                                        degrees_per_05db_num,
1695                                        &temperature_comp[c]);
1696
1697                 factory_gain_index[c] = measurement->gain_idx;
1698                 factory_actual_pwr[c] = measurement->actual_pow;
1699
1700                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
1701                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
1702                                   "curr tmp %d, comp %d steps\n",
1703                                   factory_temp, current_temp,
1704                                   temperature_comp[c]);
1705
1706                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
1707                                   factory_gain_index[c],
1708                                   factory_actual_pwr[c]);
1709         }
1710
1711         /* for each of 33 bit-rates (including 1 for CCK) */
1712         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
1713                 u8 is_mimo_rate;
1714                 union iwl4965_tx_power_dual_stream tx_power;
1715
1716                 /* for mimo, reduce each chain's txpower by half
1717                  * (3dB, 6 steps), so total output power is regulatory
1718                  * compliant. */
1719                 if (i & 0x8) {
1720                         current_regulatory = reg_limit -
1721                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
1722                         is_mimo_rate = 1;
1723                 } else {
1724                         current_regulatory = reg_limit;
1725                         is_mimo_rate = 0;
1726                 }
1727
1728                 /* find txpower limit, either hardware or regulatory */
1729                 power_limit = saturation_power - back_off_table[i];
1730                 if (power_limit > current_regulatory)
1731                         power_limit = current_regulatory;
1732
1733                 /* reduce user's txpower request if necessary
1734                  * for this rate on this channel */
1735                 target_power = user_target_power;
1736                 if (target_power > power_limit)
1737                         target_power = power_limit;
1738
1739                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
1740                                   i, saturation_power - back_off_table[i],
1741                                   current_regulatory, user_target_power,
1742                                   target_power);
1743
1744                 /* for each of 2 Tx chains (radio transmitters) */
1745                 for (c = 0; c < 2; c++) {
1746                         s32 atten_value;
1747
1748                         if (is_mimo_rate)
1749                                 atten_value =
1750                                     (s32)le32_to_cpu(priv->card_alive_init.
1751                                     tx_atten[txatten_grp][c]);
1752                         else
1753                                 atten_value = 0;
1754
1755                         /* calculate index; higher index means lower txpower */
1756                         power_index = (u8) (factory_gain_index[c] -
1757                                             (target_power -
1758                                              factory_actual_pwr[c]) -
1759                                             temperature_comp[c] -
1760                                             voltage_compensation +
1761                                             atten_value);
1762
1763 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
1764                                                 power_index); */
1765
1766                         if (power_index < get_min_power_index(i, band))
1767                                 power_index = get_min_power_index(i, band);
1768
1769                         /* adjust 5 GHz index to support negative indexes */
1770                         if (!band)
1771                                 power_index += 9;
1772
1773                         /* CCK, rate 32, reduce txpower for CCK */
1774                         if (i == POWER_TABLE_CCK_ENTRY)
1775                                 power_index +=
1776                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
1777
1778                         /* stay within the table! */
1779                         if (power_index > 107) {
1780                                 IWL_WARNING("txpower index %d > 107\n",
1781                                             power_index);
1782                                 power_index = 107;
1783                         }
1784                         if (power_index < 0) {
1785                                 IWL_WARNING("txpower index %d < 0\n",
1786                                             power_index);
1787                                 power_index = 0;
1788                         }
1789
1790                         /* fill txpower command for this rate/chain */
1791                         tx_power.s.radio_tx_gain[c] =
1792                                 gain_table[band][power_index].radio;
1793                         tx_power.s.dsp_predis_atten[c] =
1794                                 gain_table[band][power_index].dsp;
1795
1796                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
1797                                           "gain 0x%02x dsp %d\n",
1798                                           c, atten_value, power_index,
1799                                         tx_power.s.radio_tx_gain[c],
1800                                         tx_power.s.dsp_predis_atten[c]);
1801                 }/* for each chain */
1802
1803                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
1804
1805         }/* for each rate */
1806
1807         return 0;
1808 }
1809
1810 /**
1811  * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
1812  *
1813  * Uses the active RXON for channel, band, and characteristics (fat, high)
1814  * The power limit is taken from priv->user_txpower_limit.
1815  */
1816 int iwl4965_hw_reg_send_txpower(struct iwl_priv *priv)
1817 {
1818         struct iwl4965_txpowertable_cmd cmd = { 0 };
1819         int ret;
1820         u8 band = 0;
1821         u8 is_fat = 0;
1822         u8 ctrl_chan_high = 0;
1823
1824         if (test_bit(STATUS_SCANNING, &priv->status)) {
1825                 /* If this gets hit a lot, switch it to a BUG() and catch
1826                  * the stack trace to find out who is calling this during
1827                  * a scan. */
1828                 IWL_WARNING("TX Power requested while scanning!\n");
1829                 return -EAGAIN;
1830         }
1831
1832         band = priv->band == IEEE80211_BAND_2GHZ;
1833
1834         is_fat =  is_fat_channel(priv->active_rxon.flags);
1835
1836         if (is_fat &&
1837             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1838                 ctrl_chan_high = 1;
1839
1840         cmd.band = band;
1841         cmd.channel = priv->active_rxon.channel;
1842
1843         ret = iwl4965_fill_txpower_tbl(priv, band,
1844                                 le16_to_cpu(priv->active_rxon.channel),
1845                                 is_fat, ctrl_chan_high, &cmd.tx_power);
1846         if (ret)
1847                 goto out;
1848
1849         ret = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
1850
1851 out:
1852         return ret;
1853 }
1854
1855 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
1856 {
1857         int ret = 0;
1858         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1859         const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1860         const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1861
1862         if ((rxon1->flags == rxon2->flags) &&
1863             (rxon1->filter_flags == rxon2->filter_flags) &&
1864             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1865             (rxon1->ofdm_ht_single_stream_basic_rates ==
1866              rxon2->ofdm_ht_single_stream_basic_rates) &&
1867             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1868              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1869             (rxon1->rx_chain == rxon2->rx_chain) &&
1870             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1871                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1872                 return 0;
1873         }
1874
1875         rxon_assoc.flags = priv->staging_rxon.flags;
1876         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1877         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1878         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1879         rxon_assoc.reserved = 0;
1880         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1881             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1882         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1883             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1884         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1885
1886         ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
1887                                      sizeof(rxon_assoc), &rxon_assoc, NULL);
1888         if (ret)
1889                 return ret;
1890
1891         return ret;
1892 }
1893
1894
1895 int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
1896 {
1897         int rc;
1898         u8 band = 0;
1899         u8 is_fat = 0;
1900         u8 ctrl_chan_high = 0;
1901         struct iwl4965_channel_switch_cmd cmd = { 0 };
1902         const struct iwl_channel_info *ch_info;
1903
1904         band = priv->band == IEEE80211_BAND_2GHZ;
1905
1906         ch_info = iwl_get_channel_info(priv, priv->band, channel);
1907
1908         is_fat = is_fat_channel(priv->staging_rxon.flags);
1909
1910         if (is_fat &&
1911             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1912                 ctrl_chan_high = 1;
1913
1914         cmd.band = band;
1915         cmd.expect_beacon = 0;
1916         cmd.channel = cpu_to_le16(channel);
1917         cmd.rxon_flags = priv->active_rxon.flags;
1918         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
1919         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
1920         if (ch_info)
1921                 cmd.expect_beacon = is_channel_radar(ch_info);
1922         else
1923                 cmd.expect_beacon = 1;
1924
1925         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
1926                                       ctrl_chan_high, &cmd.tx_power);
1927         if (rc) {
1928                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
1929                 return rc;
1930         }
1931
1932         rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
1933         return rc;
1934 }
1935
1936 static int iwl4965_shared_mem_rx_idx(struct iwl_priv *priv)
1937 {
1938         struct iwl4965_shared *s = priv->shared_virt;
1939         return le32_to_cpu(s->rb_closed) & 0xFFF;
1940 }
1941
1942 int iwl4965_hw_get_temperature(struct iwl_priv *priv)
1943 {
1944         return priv->temperature;
1945 }
1946
1947 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl_priv *priv,
1948                           struct iwl_frame *frame, u8 rate)
1949 {
1950         struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
1951         unsigned int frame_size;
1952
1953         tx_beacon_cmd = &frame->u.beacon;
1954         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
1955
1956         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
1957         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1958
1959         frame_size = iwl4965_fill_beacon_frame(priv,
1960                                 tx_beacon_cmd->frame,
1961                                 iwl_bcast_addr,
1962                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
1963
1964         BUG_ON(frame_size > MAX_MPDU_SIZE);
1965         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
1966
1967         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
1968                 tx_beacon_cmd->tx.rate_n_flags =
1969                         iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
1970         else
1971                 tx_beacon_cmd->tx.rate_n_flags =
1972                         iwl4965_hw_set_rate_n_flags(rate, 0);
1973
1974         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
1975                                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
1976         return (sizeof(*tx_beacon_cmd) + frame_size);
1977 }
1978
1979 static int iwl4965_alloc_shared_mem(struct iwl_priv *priv)
1980 {
1981         priv->shared_virt = pci_alloc_consistent(priv->pci_dev,
1982                                         sizeof(struct iwl4965_shared),
1983                                         &priv->shared_phys);
1984         if (!priv->shared_virt)
1985                 return -ENOMEM;
1986
1987         memset(priv->shared_virt, 0, sizeof(struct iwl4965_shared));
1988
1989         priv->rb_closed_offset = offsetof(struct iwl4965_shared, rb_closed);
1990
1991         return 0;
1992 }
1993
1994 static void iwl4965_free_shared_mem(struct iwl_priv *priv)
1995 {
1996         if (priv->shared_virt)
1997                 pci_free_consistent(priv->pci_dev,
1998                                     sizeof(struct iwl4965_shared),
1999                                     priv->shared_virt,
2000                                     priv->shared_phys);
2001 }
2002
2003 /**
2004  * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
2005  */
2006 static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
2007                                             struct iwl_tx_queue *txq,
2008                                             u16 byte_cnt)
2009 {
2010         int len;
2011         int txq_id = txq->q.id;
2012         struct iwl4965_shared *shared_data = priv->shared_virt;
2013
2014         len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
2015
2016         /* Set up byte count within first 256 entries */
2017         IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2018                        tfd_offset[txq->q.write_ptr], byte_cnt, len);
2019
2020         /* If within first 64 entries, duplicate at end */
2021         if (txq->q.write_ptr < IWL49_MAX_WIN_SIZE)
2022                 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2023                         tfd_offset[IWL49_QUEUE_SIZE + txq->q.write_ptr],
2024                         byte_cnt, len);
2025 }
2026
2027 /**
2028  * sign_extend - Sign extend a value using specified bit as sign-bit
2029  *
2030  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
2031  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
2032  *
2033  * @param oper value to sign extend
2034  * @param index 0 based bit index (0<=index<32) to sign bit
2035  */
2036 static s32 sign_extend(u32 oper, int index)
2037 {
2038         u8 shift = 31 - index;
2039
2040         return (s32)(oper << shift) >> shift;
2041 }
2042
2043 /**
2044  * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
2045  * @statistics: Provides the temperature reading from the uCode
2046  *
2047  * A return of <0 indicates bogus data in the statistics
2048  */
2049 int iwl4965_get_temperature(const struct iwl_priv *priv)
2050 {
2051         s32 temperature;
2052         s32 vt;
2053         s32 R1, R2, R3;
2054         u32 R4;
2055
2056         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
2057                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
2058                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
2059                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
2060                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
2061                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
2062                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
2063         } else {
2064                 IWL_DEBUG_TEMP("Running temperature calibration\n");
2065                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
2066                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
2067                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
2068                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
2069         }
2070
2071         /*
2072          * Temperature is only 23 bits, so sign extend out to 32.
2073          *
2074          * NOTE If we haven't received a statistics notification yet
2075          * with an updated temperature, use R4 provided to us in the
2076          * "initialize" ALIVE response.
2077          */
2078         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
2079                 vt = sign_extend(R4, 23);
2080         else
2081                 vt = sign_extend(
2082                         le32_to_cpu(priv->statistics.general.temperature), 23);
2083
2084         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
2085                        R1, R2, R3, vt);
2086
2087         if (R3 == R1) {
2088                 IWL_ERROR("Calibration conflict R1 == R3\n");
2089                 return -1;
2090         }
2091
2092         /* Calculate temperature in degrees Kelvin, adjust by 97%.
2093          * Add offset to center the adjustment around 0 degrees Centigrade. */
2094         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
2095         temperature /= (R3 - R1);
2096         temperature = (temperature * 97) / 100 +
2097             TEMPERATURE_CALIB_KELVIN_OFFSET;
2098
2099         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
2100             KELVIN_TO_CELSIUS(temperature));
2101
2102         return temperature;
2103 }
2104
2105 /* Adjust Txpower only if temperature variance is greater than threshold. */
2106 #define IWL_TEMPERATURE_THRESHOLD   3
2107
2108 /**
2109  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
2110  *
2111  * If the temperature changed has changed sufficiently, then a recalibration
2112  * is needed.
2113  *
2114  * Assumes caller will replace priv->last_temperature once calibration
2115  * executed.
2116  */
2117 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
2118 {
2119         int temp_diff;
2120
2121         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
2122                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
2123                 return 0;
2124         }
2125
2126         temp_diff = priv->temperature - priv->last_temperature;
2127
2128         /* get absolute value */
2129         if (temp_diff < 0) {
2130                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
2131                 temp_diff = -temp_diff;
2132         } else if (temp_diff == 0)
2133                 IWL_DEBUG_POWER("Same temp, \n");
2134         else
2135                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
2136
2137         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
2138                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
2139                 return 0;
2140         }
2141
2142         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
2143
2144         return 1;
2145 }
2146
2147 /* Calculate noise level, based on measurements during network silence just
2148  *   before arriving beacon.  This measurement can be done only if we know
2149  *   exactly when to expect beacons, therefore only when we're associated. */
2150 static void iwl4965_rx_calc_noise(struct iwl_priv *priv)
2151 {
2152         struct statistics_rx_non_phy *rx_info
2153                                 = &(priv->statistics.rx.general);
2154         int num_active_rx = 0;
2155         int total_silence = 0;
2156         int bcn_silence_a =
2157                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
2158         int bcn_silence_b =
2159                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
2160         int bcn_silence_c =
2161                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
2162
2163         if (bcn_silence_a) {
2164                 total_silence += bcn_silence_a;
2165                 num_active_rx++;
2166         }
2167         if (bcn_silence_b) {
2168                 total_silence += bcn_silence_b;
2169                 num_active_rx++;
2170         }
2171         if (bcn_silence_c) {
2172                 total_silence += bcn_silence_c;
2173                 num_active_rx++;
2174         }
2175
2176         /* Average among active antennas */
2177         if (num_active_rx)
2178                 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
2179         else
2180                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
2181
2182         IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
2183                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
2184                         priv->last_rx_noise);
2185 }
2186
2187 void iwl4965_hw_rx_statistics(struct iwl_priv *priv,
2188                               struct iwl_rx_mem_buffer *rxb)
2189 {
2190         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2191         int change;
2192         s32 temp;
2193
2194         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
2195                      (int)sizeof(priv->statistics), pkt->len);
2196
2197         change = ((priv->statistics.general.temperature !=
2198                    pkt->u.stats.general.temperature) ||
2199                   ((priv->statistics.flag &
2200                     STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
2201                    (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
2202
2203         memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
2204
2205         set_bit(STATUS_STATISTICS, &priv->status);
2206
2207         /* Reschedule the statistics timer to occur in
2208          * REG_RECALIB_PERIOD seconds to ensure we get a
2209          * thermal update even if the uCode doesn't give
2210          * us one */
2211         mod_timer(&priv->statistics_periodic, jiffies +
2212                   msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
2213
2214         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
2215             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
2216                 iwl4965_rx_calc_noise(priv);
2217 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
2218                 queue_work(priv->workqueue, &priv->sensitivity_work);
2219 #endif
2220         }
2221
2222         iwl_leds_background(priv);
2223
2224         /* If the hardware hasn't reported a change in
2225          * temperature then don't bother computing a
2226          * calibrated temperature value */
2227         if (!change)
2228                 return;
2229
2230         temp = iwl4965_get_temperature(priv);
2231         if (temp < 0)
2232                 return;
2233
2234         if (priv->temperature != temp) {
2235                 if (priv->temperature)
2236                         IWL_DEBUG_TEMP("Temperature changed "
2237                                        "from %dC to %dC\n",
2238                                        KELVIN_TO_CELSIUS(priv->temperature),
2239                                        KELVIN_TO_CELSIUS(temp));
2240                 else
2241                         IWL_DEBUG_TEMP("Temperature "
2242                                        "initialized to %dC\n",
2243                                        KELVIN_TO_CELSIUS(temp));
2244         }
2245
2246         priv->temperature = temp;
2247         set_bit(STATUS_TEMPERATURE, &priv->status);
2248
2249         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
2250                      iwl4965_is_temp_calib_needed(priv))
2251                 queue_work(priv->workqueue, &priv->txpower_work);
2252 }
2253
2254 static void iwl4965_add_radiotap(struct iwl_priv *priv,
2255                                  struct sk_buff *skb,
2256                                  struct iwl4965_rx_phy_res *rx_start,
2257                                  struct ieee80211_rx_status *stats,
2258                                  u32 ampdu_status)
2259 {
2260         s8 signal = stats->signal;
2261         s8 noise = 0;
2262         int rate = stats->rate_idx;
2263         u64 tsf = stats->mactime;
2264         __le16 antenna;
2265         __le16 phy_flags_hw = rx_start->phy_flags;
2266         struct iwl4965_rt_rx_hdr {
2267                 struct ieee80211_radiotap_header rt_hdr;
2268                 __le64 rt_tsf;          /* TSF */
2269                 u8 rt_flags;            /* radiotap packet flags */
2270                 u8 rt_rate;             /* rate in 500kb/s */
2271                 __le16 rt_channelMHz;   /* channel in MHz */
2272                 __le16 rt_chbitmask;    /* channel bitfield */
2273                 s8 rt_dbmsignal;        /* signal in dBm, kluged to signed */
2274                 s8 rt_dbmnoise;
2275                 u8 rt_antenna;          /* antenna number */
2276         } __attribute__ ((packed)) *iwl4965_rt;
2277
2278         /* TODO: We won't have enough headroom for HT frames. Fix it later. */
2279         if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
2280                 if (net_ratelimit())
2281                         printk(KERN_ERR "not enough headroom [%d] for "
2282                                "radiotap head [%zd]\n",
2283                                skb_headroom(skb), sizeof(*iwl4965_rt));
2284                 return;
2285         }
2286
2287         /* put radiotap header in front of 802.11 header and data */
2288         iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
2289
2290         /* initialise radiotap header */
2291         iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
2292         iwl4965_rt->rt_hdr.it_pad = 0;
2293
2294         /* total header + data */
2295         put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
2296                       &iwl4965_rt->rt_hdr.it_len);
2297
2298         /* Indicate all the fields we add to the radiotap header */
2299         put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
2300                                   (1 << IEEE80211_RADIOTAP_FLAGS) |
2301                                   (1 << IEEE80211_RADIOTAP_RATE) |
2302                                   (1 << IEEE80211_RADIOTAP_CHANNEL) |
2303                                   (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
2304                                   (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
2305                                   (1 << IEEE80211_RADIOTAP_ANTENNA)),
2306                       &iwl4965_rt->rt_hdr.it_present);
2307
2308         /* Zero the flags, we'll add to them as we go */
2309         iwl4965_rt->rt_flags = 0;
2310
2311         put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
2312
2313         iwl4965_rt->rt_dbmsignal = signal;
2314         iwl4965_rt->rt_dbmnoise = noise;
2315
2316         /* Convert the channel frequency and set the flags */
2317         put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
2318         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
2319                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
2320                                           IEEE80211_CHAN_5GHZ),
2321                               &iwl4965_rt->rt_chbitmask);
2322         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
2323                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
2324                                           IEEE80211_CHAN_2GHZ),
2325                               &iwl4965_rt->rt_chbitmask);
2326         else    /* 802.11g */
2327                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
2328                                           IEEE80211_CHAN_2GHZ),
2329                               &iwl4965_rt->rt_chbitmask);
2330
2331         if (rate == -1)
2332                 iwl4965_rt->rt_rate = 0;
2333         else
2334                 iwl4965_rt->rt_rate = iwl_rates[rate].ieee;
2335
2336         /*
2337          * "antenna number"
2338          *
2339          * It seems that the antenna field in the phy flags value
2340          * is actually a bitfield. This is undefined by radiotap,
2341          * it wants an actual antenna number but I always get "7"
2342          * for most legacy frames I receive indicating that the
2343          * same frame was received on all three RX chains.
2344          *
2345          * I think this field should be removed in favour of a
2346          * new 802.11n radiotap field "RX chains" that is defined
2347          * as a bitmask.
2348          */
2349         antenna = phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK;
2350         iwl4965_rt->rt_antenna = le16_to_cpu(antenna) >> 4;
2351
2352         /* set the preamble flag if appropriate */
2353         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
2354                 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
2355
2356         stats->flag |= RX_FLAG_RADIOTAP;
2357 }
2358
2359 static void iwl_update_rx_stats(struct iwl_priv *priv, u16 fc, u16 len)
2360 {
2361         /* 0 - mgmt, 1 - cnt, 2 - data */
2362         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
2363         priv->rx_stats[idx].cnt++;
2364         priv->rx_stats[idx].bytes += len;
2365 }
2366
2367 /*
2368  * returns non-zero if packet should be dropped
2369  */
2370 static int iwl4965_set_decrypted_flag(struct iwl_priv *priv,
2371                                       struct ieee80211_hdr *hdr,
2372                                       u32 decrypt_res,
2373                                       struct ieee80211_rx_status *stats)
2374 {
2375         u16 fc = le16_to_cpu(hdr->frame_control);
2376
2377         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2378                 return 0;
2379
2380         if (!(fc & IEEE80211_FCTL_PROTECTED))
2381                 return 0;
2382
2383         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2384         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2385         case RX_RES_STATUS_SEC_TYPE_TKIP:
2386                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2387                  * Decryption will be done in SW. */
2388                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2389                     RX_RES_STATUS_BAD_KEY_TTAK)
2390                         break;
2391
2392                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2393                     RX_RES_STATUS_BAD_ICV_MIC) {
2394                         /* bad ICV, the packet is destroyed since the
2395                          * decryption is inplace, drop it */
2396                         IWL_DEBUG_RX("Packet destroyed\n");
2397                         return -1;
2398                 }
2399         case RX_RES_STATUS_SEC_TYPE_WEP:
2400         case RX_RES_STATUS_SEC_TYPE_CCMP:
2401                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2402                     RX_RES_STATUS_DECRYPT_OK) {
2403                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2404                         stats->flag |= RX_FLAG_DECRYPTED;
2405                 }
2406                 break;
2407
2408         default:
2409                 break;
2410         }
2411         return 0;
2412 }
2413
2414 static u32 iwl4965_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
2415 {
2416         u32 decrypt_out = 0;
2417
2418         if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
2419                                         RX_RES_STATUS_STATION_FOUND)
2420                 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
2421                                 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
2422
2423         decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
2424
2425         /* packet was not encrypted */
2426         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
2427                                         RX_RES_STATUS_SEC_TYPE_NONE)
2428                 return decrypt_out;
2429
2430         /* packet was encrypted with unknown alg */
2431         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
2432                                         RX_RES_STATUS_SEC_TYPE_ERR)
2433                 return decrypt_out;
2434
2435         /* decryption was not done in HW */
2436         if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
2437                                         RX_MPDU_RES_STATUS_DEC_DONE_MSK)
2438                 return decrypt_out;
2439
2440         switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
2441
2442         case RX_RES_STATUS_SEC_TYPE_CCMP:
2443                 /* alg is CCM: check MIC only */
2444                 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
2445                         /* Bad MIC */
2446                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
2447                 else
2448                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
2449
2450                 break;
2451
2452         case RX_RES_STATUS_SEC_TYPE_TKIP:
2453                 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
2454                         /* Bad TTAK */
2455                         decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
2456                         break;
2457                 }
2458                 /* fall through if TTAK OK */
2459         default:
2460                 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
2461                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
2462                 else
2463                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
2464                 break;
2465         };
2466
2467         IWL_DEBUG_RX("decrypt_in:0x%x  decrypt_out = 0x%x\n",
2468                                         decrypt_in, decrypt_out);
2469
2470         return decrypt_out;
2471 }
2472
2473 static void iwl4965_handle_data_packet(struct iwl_priv *priv, int is_data,
2474                                        int include_phy,
2475                                        struct iwl_rx_mem_buffer *rxb,
2476                                        struct ieee80211_rx_status *stats)
2477 {
2478         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2479         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
2480             (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
2481         struct ieee80211_hdr *hdr;
2482         u16 len;
2483         __le32 *rx_end;
2484         unsigned int skblen;
2485         u32 ampdu_status;
2486         u32 ampdu_status_legacy;
2487
2488         if (!include_phy && priv->last_phy_res[0])
2489                 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
2490
2491         if (!rx_start) {
2492                 IWL_ERROR("MPDU frame without a PHY data\n");
2493                 return;
2494         }
2495         if (include_phy) {
2496                 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
2497                                                rx_start->cfg_phy_cnt);
2498
2499                 len = le16_to_cpu(rx_start->byte_count);
2500
2501                 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
2502                                   sizeof(struct iwl4965_rx_phy_res) +
2503                                   rx_start->cfg_phy_cnt + len);
2504
2505         } else {
2506                 struct iwl4965_rx_mpdu_res_start *amsdu =
2507                     (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
2508
2509                 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
2510                                sizeof(struct iwl4965_rx_mpdu_res_start));
2511                 len =  le16_to_cpu(amsdu->byte_count);
2512                 rx_start->byte_count = amsdu->byte_count;
2513                 rx_end = (__le32 *) (((u8 *) hdr) + len);
2514         }
2515         /* In monitor mode allow 802.11 ACk frames (10 bytes) */
2516         if (len > priv->hw_params.max_pkt_size ||
2517             len < ((priv->iw_mode == IEEE80211_IF_TYPE_MNTR) ? 10 : 16)) {
2518                 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
2519                 return;
2520         }
2521
2522         ampdu_status = le32_to_cpu(*rx_end);
2523         skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
2524
2525         if (!include_phy) {
2526                 /* New status scheme, need to translate */
2527                 ampdu_status_legacy = ampdu_status;
2528                 ampdu_status = iwl4965_translate_rx_status(priv, ampdu_status);
2529         }
2530
2531         /* start from MAC */
2532         skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
2533         skb_put(rxb->skb, len); /* end where data ends */
2534
2535         /* We only process data packets if the interface is open */
2536         if (unlikely(!priv->is_open)) {
2537                 IWL_DEBUG_DROP_LIMIT
2538                     ("Dropping packet while interface is not open.\n");
2539                 return;
2540         }
2541
2542         stats->flag = 0;
2543         hdr = (struct ieee80211_hdr *)rxb->skb->data;
2544
2545         /*  in case of HW accelerated crypto and bad decryption, drop */
2546         if (!priv->hw_params.sw_crypto &&
2547             iwl4965_set_decrypted_flag(priv, hdr, ampdu_status, stats))
2548                 return;
2549
2550         if (priv->add_radiotap)
2551                 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
2552
2553         iwl_update_rx_stats(priv, le16_to_cpu(hdr->frame_control), len);
2554         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
2555         priv->alloc_rxb_skb--;
2556         rxb->skb = NULL;
2557 }
2558
2559 /* Calc max signal level (dBm) among 3 possible receivers */
2560 static int iwl4965_calc_rssi(struct iwl_priv *priv,
2561                              struct iwl4965_rx_phy_res *rx_resp)
2562 {
2563         /* data from PHY/DSP regarding signal strength, etc.,
2564          *   contents are always there, not configurable by host.  */
2565         struct iwl4965_rx_non_cfg_phy *ncphy =
2566             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
2567         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
2568                         >> IWL_AGC_DB_POS;
2569
2570         u32 valid_antennae =
2571             (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
2572                         >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
2573         u8 max_rssi = 0;
2574         u32 i;
2575
2576         /* Find max rssi among 3 possible receivers.
2577          * These values are measured by the digital signal processor (DSP).
2578          * They should stay fairly constant even as the signal strength varies,
2579          *   if the radio's automatic gain control (AGC) is working right.
2580          * AGC value (see below) will provide the "interesting" info. */
2581         for (i = 0; i < 3; i++)
2582                 if (valid_antennae & (1 << i))
2583                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
2584
2585         IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
2586                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
2587                 max_rssi, agc);
2588
2589         /* dBm = max_rssi dB - agc dB - constant.
2590          * Higher AGC (higher radio gain) means lower signal. */
2591         return (max_rssi - agc - IWL_RSSI_OFFSET);
2592 }
2593
2594 static void iwl4965_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
2595 {
2596         unsigned long flags;
2597
2598         spin_lock_irqsave(&priv->sta_lock, flags);
2599         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
2600         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
2601         priv->stations[sta_id].sta.sta.modify_mask = 0;
2602         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
2603         spin_unlock_irqrestore(&priv->sta_lock, flags);
2604
2605         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
2606 }
2607
2608 static void iwl4965_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
2609 {
2610         /* FIXME: need locking over ps_status ??? */
2611         u8 sta_id = iwl_find_station(priv, addr);
2612
2613         if (sta_id != IWL_INVALID_STATION) {
2614                 u8 sta_awake = priv->stations[sta_id].
2615                                 ps_status == STA_PS_STATUS_WAKE;
2616
2617                 if (sta_awake && ps_bit)
2618                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
2619                 else if (!sta_awake && !ps_bit) {
2620                         iwl4965_sta_modify_ps_wake(priv, sta_id);
2621                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
2622                 }
2623         }
2624 }
2625 #ifdef CONFIG_IWLWIFI_DEBUG
2626
2627 /**
2628  * iwl4965_dbg_report_frame - dump frame to syslog during debug sessions
2629  *
2630  * You may hack this function to show different aspects of received frames,
2631  * including selective frame dumps.
2632  * group100 parameter selects whether to show 1 out of 100 good frames.
2633  *
2634  * TODO:  This was originally written for 3945, need to audit for
2635  *        proper operation with 4965.
2636  */
2637 static void iwl4965_dbg_report_frame(struct iwl_priv *priv,
2638                       struct iwl_rx_packet *pkt,
2639                       struct ieee80211_hdr *header, int group100)
2640 {
2641         u32 to_us;
2642         u32 print_summary = 0;
2643         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
2644         u32 hundred = 0;
2645         u32 dataframe = 0;
2646         u16 fc;
2647         u16 seq_ctl;
2648         u16 channel;
2649         u16 phy_flags;
2650         int rate_sym;
2651         u16 length;
2652         u16 status;
2653         u16 bcn_tmr;
2654         u32 tsf_low;
2655         u64 tsf;
2656         u8 rssi;
2657         u8 agc;
2658         u16 sig_avg;
2659         u16 noise_diff;
2660         struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
2661         struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
2662         struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
2663         u8 *data = IWL_RX_DATA(pkt);
2664
2665         if (likely(!(priv->debug_level & IWL_DL_RX)))
2666                 return;
2667
2668         /* MAC header */
2669         fc = le16_to_cpu(header->frame_control);
2670         seq_ctl = le16_to_cpu(header->seq_ctrl);
2671
2672         /* metadata */
2673         channel = le16_to_cpu(rx_hdr->channel);
2674         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
2675         rate_sym = rx_hdr->rate;
2676         length = le16_to_cpu(rx_hdr->len);
2677
2678         /* end-of-frame status and timestamp */
2679         status = le32_to_cpu(rx_end->status);
2680         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
2681         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
2682         tsf = le64_to_cpu(rx_end->timestamp);
2683
2684         /* signal statistics */
2685         rssi = rx_stats->rssi;
2686         agc = rx_stats->agc;
2687         sig_avg = le16_to_cpu(rx_stats->sig_avg);
2688         noise_diff = le16_to_cpu(rx_stats->noise_diff);
2689
2690         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
2691
2692         /* if data frame is to us and all is good,
2693          *   (optionally) print summary for only 1 out of every 100 */
2694         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
2695             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
2696                 dataframe = 1;
2697                 if (!group100)
2698                         print_summary = 1;      /* print each frame */
2699                 else if (priv->framecnt_to_us < 100) {
2700                         priv->framecnt_to_us++;
2701                         print_summary = 0;
2702                 } else {
2703                         priv->framecnt_to_us = 0;
2704                         print_summary = 1;
2705                         hundred = 1;
2706                 }
2707         } else {
2708                 /* print summary for all other frames */
2709                 print_summary = 1;
2710         }
2711
2712         if (print_summary) {
2713                 char *title;
2714                 int rate_idx;
2715                 u32 bitrate;
2716
2717                 if (hundred)
2718                         title = "100Frames";
2719                 else if (fc & IEEE80211_FCTL_RETRY)
2720                         title = "Retry";
2721                 else if (ieee80211_is_assoc_response(fc))
2722                         title = "AscRsp";
2723                 else if (ieee80211_is_reassoc_response(fc))
2724                         title = "RasRsp";
2725                 else if (ieee80211_is_probe_response(fc)) {
2726                         title = "PrbRsp";
2727                         print_dump = 1; /* dump frame contents */
2728                 } else if (ieee80211_is_beacon(fc)) {
2729                         title = "Beacon";
2730                         print_dump = 1; /* dump frame contents */
2731                 } else if (ieee80211_is_atim(fc))
2732                         title = "ATIM";
2733                 else if (ieee80211_is_auth(fc))
2734                         title = "Auth";
2735                 else if (ieee80211_is_deauth(fc))
2736                         title = "DeAuth";
2737                 else if (ieee80211_is_disassoc(fc))
2738                         title = "DisAssoc";
2739                 else
2740                         title = "Frame";
2741
2742                 rate_idx = iwl4965_hwrate_to_plcp_idx(rate_sym);
2743                 if (unlikely(rate_idx == -1))
2744                         bitrate = 0;
2745                 else
2746                         bitrate = iwl_rates[rate_idx].ieee / 2;
2747
2748                 /* print frame summary.
2749                  * MAC addresses show just the last byte (for brevity),
2750                  *    but you can hack it to show more, if you'd like to. */
2751                 if (dataframe)
2752                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
2753                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
2754                                      title, fc, header->addr1[5],
2755                                      length, rssi, channel, bitrate);
2756                 else {
2757                         /* src/dst addresses assume managed mode */
2758                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
2759                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
2760                                      "phy=0x%02x, chnl=%d\n",
2761                                      title, fc, header->addr1[5],
2762                                      header->addr3[5], rssi,
2763                                      tsf_low - priv->scan_start_tsf,
2764                                      phy_flags, channel);
2765                 }
2766         }
2767         if (print_dump)
2768                 iwl_print_hex_dump(priv, IWL_DL_RX, data, length);
2769 }
2770 #else
2771 static inline void iwl4965_dbg_report_frame(struct iwl_priv *priv,
2772                                             struct iwl_rx_packet *pkt,
2773                                             struct ieee80211_hdr *header,
2774                                             int group100)
2775 {
2776 }
2777 #endif
2778
2779
2780
2781 /* Called for REPLY_RX (legacy ABG frames), or
2782  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
2783 static void iwl4965_rx_reply_rx(struct iwl_priv *priv,
2784                                 struct iwl_rx_mem_buffer *rxb)
2785 {
2786         struct ieee80211_hdr *header;
2787         struct ieee80211_rx_status rx_status;
2788         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2789         /* Use phy data (Rx signal strength, etc.) contained within
2790          *   this rx packet for legacy frames,
2791          *   or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
2792         int include_phy = (pkt->hdr.cmd == REPLY_RX);
2793         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
2794                 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
2795                 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
2796         __le32 *rx_end;
2797         unsigned int len = 0;
2798         u16 fc;
2799         u8 network_packet;
2800
2801         rx_status.mactime = le64_to_cpu(rx_start->timestamp);
2802         rx_status.freq =
2803                 ieee80211_channel_to_frequency(le16_to_cpu(rx_start->channel));
2804         rx_status.band = (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
2805                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
2806         rx_status.rate_idx =
2807                 iwl4965_hwrate_to_plcp_idx(le32_to_cpu(rx_start->rate_n_flags));
2808         if (rx_status.band == IEEE80211_BAND_5GHZ)
2809                 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
2810
2811         rx_status.antenna = 0;
2812         rx_status.flag = 0;
2813
2814         if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
2815                 IWL_DEBUG_DROP("dsp size out of range [0,20]: %d/n",
2816                                 rx_start->cfg_phy_cnt);
2817                 return;
2818         }
2819
2820         if (!include_phy) {
2821                 if (priv->last_phy_res[0])
2822                         rx_start = (struct iwl4965_rx_phy_res *)
2823                                 &priv->last_phy_res[1];
2824                 else
2825                         rx_start = NULL;
2826         }
2827
2828         if (!rx_start) {
2829                 IWL_ERROR("MPDU frame without a PHY data\n");
2830                 return;
2831         }
2832
2833         if (include_phy) {
2834                 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
2835                                                   + rx_start->cfg_phy_cnt);
2836
2837                 len = le16_to_cpu(rx_start->byte_count);
2838                 rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt +
2839                                   sizeof(struct iwl4965_rx_phy_res) + len);
2840         } else {
2841                 struct iwl4965_rx_mpdu_res_start *amsdu =
2842                         (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
2843
2844                 header = (void *)(pkt->u.raw +
2845                         sizeof(struct iwl4965_rx_mpdu_res_start));
2846                 len = le16_to_cpu(amsdu->byte_count);
2847                 rx_end = (__le32 *) (pkt->u.raw +
2848                         sizeof(struct iwl4965_rx_mpdu_res_start) + len);
2849         }
2850
2851         if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
2852             !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
2853                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
2854                                 le32_to_cpu(*rx_end));
2855                 return;
2856         }
2857
2858         priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
2859
2860         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
2861         rx_status.signal = iwl4965_calc_rssi(priv, rx_start);
2862
2863         /* Meaningful noise values are available only from beacon statistics,
2864          *   which are gathered only when associated, and indicate noise
2865          *   only for the associated network channel ...
2866          * Ignore these noise values while scanning (other channels) */
2867         if (iwl_is_associated(priv) &&
2868             !test_bit(STATUS_SCANNING, &priv->status)) {
2869                 rx_status.noise = priv->last_rx_noise;
2870                 rx_status.qual = iwl4965_calc_sig_qual(rx_status.signal,
2871                                                          rx_status.noise);
2872         } else {
2873                 rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
2874                 rx_status.qual = iwl4965_calc_sig_qual(rx_status.signal, 0);
2875         }
2876
2877         /* Reset beacon noise level if not associated. */
2878         if (!iwl_is_associated(priv))
2879                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
2880
2881         /* Set "1" to report good data frames in groups of 100 */
2882         /* FIXME: need to optimze the call: */
2883         iwl4965_dbg_report_frame(priv, pkt, header, 1);
2884
2885         IWL_DEBUG_STATS_LIMIT("Rssi %d, noise %d, qual %d, TSF %llu\n",
2886                               rx_status.signal, rx_status.noise, rx_status.signal,
2887                               (unsigned long long)rx_status.mactime);
2888
2889
2890         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
2891                 iwl4965_handle_data_packet(priv, 1, include_phy,
2892                                                  rxb, &rx_status);
2893                 return;
2894         }
2895
2896         network_packet = iwl4965_is_network_packet(priv, header);
2897         if (network_packet) {
2898                 priv->last_rx_rssi = rx_status.signal;
2899                 priv->last_beacon_time =  priv->ucode_beacon_time;
2900                 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
2901         }
2902
2903         fc = le16_to_cpu(header->frame_control);
2904         switch (fc & IEEE80211_FCTL_FTYPE) {
2905         case IEEE80211_FTYPE_MGMT:
2906                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
2907                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
2908                                                 header->addr2);
2909                 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &rx_status);
2910                 break;
2911
2912         case IEEE80211_FTYPE_CTL:
2913 #ifdef CONFIG_IWL4965_HT
2914                 switch (fc & IEEE80211_FCTL_STYPE) {
2915                 case IEEE80211_STYPE_BACK_REQ:
2916                         IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
2917                         iwl4965_handle_data_packet(priv, 0, include_phy,
2918                                                 rxb, &rx_status);
2919                         break;
2920                 default:
2921                         break;
2922                 }
2923 #endif
2924                 break;
2925
2926         case IEEE80211_FTYPE_DATA: {
2927                 DECLARE_MAC_BUF(mac1);
2928                 DECLARE_MAC_BUF(mac2);
2929                 DECLARE_MAC_BUF(mac3);
2930
2931                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
2932                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
2933                                                 header->addr2);
2934
2935                 if (unlikely(!network_packet))
2936                         IWL_DEBUG_DROP("Dropping (non network): "
2937                                        "%s, %s, %s\n",
2938                                        print_mac(mac1, header->addr1),
2939                                        print_mac(mac2, header->addr2),
2940                                        print_mac(mac3, header->addr3));
2941                 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
2942                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
2943                                        print_mac(mac1, header->addr1),
2944                                        print_mac(mac2, header->addr2),
2945                                        print_mac(mac3, header->addr3));
2946                 else
2947                         iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
2948                                                    &rx_status);
2949                 break;
2950         }
2951         default:
2952                 break;
2953
2954         }
2955 }
2956
2957 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
2958  * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
2959 static void iwl4965_rx_reply_rx_phy(struct iwl_priv *priv,
2960                                     struct iwl_rx_mem_buffer *rxb)
2961 {
2962         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2963         priv->last_phy_res[0] = 1;
2964         memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
2965                sizeof(struct iwl4965_rx_phy_res));
2966 }
2967 static void iwl4965_rx_missed_beacon_notif(struct iwl_priv *priv,
2968                                            struct iwl_rx_mem_buffer *rxb)
2969
2970 {
2971 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
2972         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2973         struct iwl4965_missed_beacon_notif *missed_beacon;
2974
2975         missed_beacon = &pkt->u.missed_beacon;
2976         if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
2977                 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
2978                     le32_to_cpu(missed_beacon->consequtive_missed_beacons),
2979                     le32_to_cpu(missed_beacon->total_missed_becons),
2980                     le32_to_cpu(missed_beacon->num_recvd_beacons),
2981                     le32_to_cpu(missed_beacon->num_expected_beacons));
2982                 if (!test_bit(STATUS_SCANNING, &priv->status))
2983                         iwl_init_sensitivity(priv);
2984         }
2985 #endif /*CONFIG_IWL4965_RUN_TIME_CALIB*/
2986 }
2987 #ifdef CONFIG_IWL4965_HT
2988
2989 /**
2990  * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
2991  */
2992 static void iwl4965_sta_modify_enable_tid_tx(struct iwl_priv *priv,
2993                                          int sta_id, int tid)
2994 {
2995         unsigned long flags;
2996
2997         /* Remove "disable" flag, to enable Tx for this TID */
2998         spin_lock_irqsave(&priv->sta_lock, flags);
2999         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
3000         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
3001         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3002         spin_unlock_irqrestore(&priv->sta_lock, flags);
3003
3004         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3005 }
3006
3007 /**
3008  * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
3009  *
3010  * Go through block-ack's bitmap of ACK'd frames, update driver's record of
3011  * ACK vs. not.  This gets sent to mac80211, then to rate scaling algo.
3012  */
3013 static int iwl4965_tx_status_reply_compressed_ba(struct iwl_priv *priv,
3014                                                  struct iwl_ht_agg *agg,
3015                                                  struct iwl4965_compressed_ba_resp*
3016                                                  ba_resp)
3017
3018 {
3019         int i, sh, ack;
3020         u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
3021         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
3022         u64 bitmap;
3023         int successes = 0;
3024         struct ieee80211_tx_status *tx_status;
3025
3026         if (unlikely(!agg->wait_for_ba))  {
3027                 IWL_ERROR("Received BA when not expected\n");
3028                 return -EINVAL;
3029         }
3030
3031         /* Mark that the expected block-ack response arrived */
3032         agg->wait_for_ba = 0;
3033         IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
3034
3035         /* Calculate shift to align block-ack bits with our Tx window bits */
3036         sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
3037         if (sh < 0) /* tbw something is wrong with indices */
3038                 sh += 0x100;
3039
3040         /* don't use 64-bit values for now */
3041         bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
3042
3043         if (agg->frame_count > (64 - sh)) {
3044                 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
3045                 return -1;
3046         }
3047
3048         /* check for success or failure according to the
3049          * transmitted bitmap and block-ack bitmap */
3050         bitmap &= agg->bitmap;
3051
3052         /* For each frame attempted in aggregation,
3053          * update driver's record of tx frame's status. */
3054         for (i = 0; i < agg->frame_count ; i++) {
3055                 ack = bitmap & (1 << i);
3056                 successes += !!ack;
3057                 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
3058                         ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
3059                         agg->start_idx + i);
3060         }
3061
3062         tx_status = &priv->txq[scd_flow].txb[agg->start_idx].status;
3063         tx_status->flags = IEEE80211_TX_STATUS_ACK;
3064         tx_status->flags |= IEEE80211_TX_STATUS_AMPDU;
3065         tx_status->ampdu_ack_map = successes;
3066         tx_status->ampdu_ack_len = agg->frame_count;
3067         iwl4965_hwrate_to_tx_control(priv, agg->rate_n_flags,
3068                                      &tx_status->control);
3069
3070         IWL_DEBUG_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap);
3071
3072         return 0;
3073 }
3074
3075 /**
3076  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
3077  */
3078 static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
3079                                             u16 txq_id)
3080 {
3081         /* Simply stop the queue, but don't change any configuration;
3082          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
3083         iwl_write_prph(priv,
3084                 IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
3085                 (0 << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE)|
3086                 (1 << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
3087 }
3088
3089 /**
3090  * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
3091  * priv->lock must be held by the caller
3092  */
3093 static int iwl4965_tx_queue_agg_disable(struct iwl_priv *priv, u16 txq_id,
3094                                         u16 ssn_idx, u8 tx_fifo)
3095 {
3096         int ret = 0;
3097
3098         if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
3099                 IWL_WARNING("queue number too small: %d, must be > %d\n",
3100                                 txq_id, IWL_BACK_QUEUE_FIRST_ID);
3101                 return -EINVAL;
3102         }
3103
3104         ret = iwl_grab_nic_access(priv);
3105         if (ret)
3106                 return ret;
3107
3108         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
3109
3110         iwl_clear_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
3111
3112         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
3113         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
3114         /* supposes that ssn_idx is valid (!= 0xFFF) */
3115         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
3116
3117         iwl_clear_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
3118         iwl4965_txq_ctx_deactivate(priv, txq_id);
3119         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
3120
3121         iwl_release_nic_access(priv);
3122
3123         return 0;
3124 }
3125
3126 int iwl4965_check_empty_hw_queue(struct iwl_priv *priv, int sta_id,
3127                                          u8 tid, int txq_id)
3128 {
3129         struct iwl_queue *q = &priv->txq[txq_id].q;
3130         u8 *addr = priv->stations[sta_id].sta.sta.addr;
3131         struct iwl_tid_data *tid_data = &priv->stations[sta_id].tid[tid];
3132
3133         switch (priv->stations[sta_id].tid[tid].agg.state) {
3134         case IWL_EMPTYING_HW_QUEUE_DELBA:
3135                 /* We are reclaiming the last packet of the */
3136                 /* aggregated HW queue */
3137                 if (txq_id  == tid_data->agg.txq_id &&
3138                     q->read_ptr == q->write_ptr) {
3139                         u16 ssn = SEQ_TO_SN(tid_data->seq_number);
3140                         int tx_fifo = default_tid_to_tx_fifo[tid];
3141                         IWL_DEBUG_HT("HW queue empty: continue DELBA flow\n");
3142                         iwl4965_tx_queue_agg_disable(priv, txq_id,
3143                                                      ssn, tx_fifo);
3144                         tid_data->agg.state = IWL_AGG_OFF;
3145                         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid);
3146                 }
3147                 break;
3148         case IWL_EMPTYING_HW_QUEUE_ADDBA:
3149                 /* We are reclaiming the last packet of the queue */
3150                 if (tid_data->tfds_in_queue == 0) {
3151                         IWL_DEBUG_HT("HW queue empty: continue ADDBA flow\n");
3152                         tid_data->agg.state = IWL_AGG_ON;
3153                         ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid);
3154                 }
3155                 break;
3156         }
3157         return 0;
3158 }
3159
3160 /**
3161  * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
3162  *
3163  * Handles block-acknowledge notification from device, which reports success
3164  * of frames sent via aggregation.
3165  */
3166 static void iwl4965_rx_reply_compressed_ba(struct iwl_priv *priv,
3167                                            struct iwl_rx_mem_buffer *rxb)
3168 {
3169         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3170         struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
3171         int index;
3172         struct iwl_tx_queue *txq = NULL;
3173         struct iwl_ht_agg *agg;
3174         DECLARE_MAC_BUF(mac);
3175
3176         /* "flow" corresponds to Tx queue */
3177         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
3178
3179         /* "ssn" is start of block-ack Tx window, corresponds to index
3180          * (in Tx queue's circular buffer) of first TFD/frame in window */
3181         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
3182
3183         if (scd_flow >= priv->hw_params.max_txq_num) {
3184                 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
3185                 return;
3186         }
3187
3188         txq = &priv->txq[scd_flow];
3189         agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
3190
3191         /* Find index just before block-ack window */
3192         index = iwl_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
3193
3194         /* TODO: Need to get this copy more safely - now good for debug */
3195
3196         IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
3197                            "sta_id = %d\n",
3198                            agg->wait_for_ba,
3199                            print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
3200                            ba_resp->sta_id);
3201         IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
3202                            "%d, scd_ssn = %d\n",
3203                            ba_resp->tid,
3204                            ba_resp->seq_ctl,
3205                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
3206                            ba_resp->scd_flow,
3207                            ba_resp->scd_ssn);
3208         IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
3209                            agg->start_idx,
3210                            (unsigned long long)agg->bitmap);
3211
3212         /* Update driver's record of ACK vs. not for each frame in window */
3213         iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
3214
3215         /* Release all TFDs before the SSN, i.e. all TFDs in front of
3216          * block-ack window (we assume that they've been successfully
3217          * transmitted ... if not, it's too late anyway). */
3218         if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
3219                 /* calculate mac80211 ampdu sw queue to wake */
3220                 int ampdu_q =
3221                    scd_flow - IWL_BACK_QUEUE_FIRST_ID + priv->hw->queues;
3222                 int freed = iwl4965_tx_queue_reclaim(priv, scd_flow, index);
3223                 priv->stations[ba_resp->sta_id].
3224                         tid[ba_resp->tid].tfds_in_queue -= freed;
3225                 if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
3226                         priv->mac80211_registered &&
3227                         agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
3228                         ieee80211_wake_queue(priv->hw, ampdu_q);
3229                 iwl4965_check_empty_hw_queue(priv, ba_resp->sta_id,
3230                         ba_resp->tid, scd_flow);
3231         }
3232 }
3233
3234 /**
3235  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
3236  */
3237 static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
3238                                         u16 txq_id)
3239 {
3240         u32 tbl_dw_addr;
3241         u32 tbl_dw;
3242         u16 scd_q2ratid;
3243
3244         scd_q2ratid = ra_tid & IWL49_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
3245
3246         tbl_dw_addr = priv->scd_base_addr +
3247                         IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
3248
3249         tbl_dw = iwl_read_targ_mem(priv, tbl_dw_addr);
3250
3251         if (txq_id & 0x1)
3252                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
3253         else
3254                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
3255
3256         iwl_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
3257
3258         return 0;
3259 }
3260
3261
3262 /**
3263  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
3264  *
3265  * NOTE:  txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
3266  *        i.e. it must be one of the higher queues used for aggregation
3267  */
3268 static int iwl4965_tx_queue_agg_enable(struct iwl_priv *priv, int txq_id,
3269                                        int tx_fifo, int sta_id, int tid,
3270                                        u16 ssn_idx)
3271 {
3272         unsigned long flags;
3273         int rc;
3274         u16 ra_tid;
3275
3276         if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
3277                 IWL_WARNING("queue number too small: %d, must be > %d\n",
3278                         txq_id, IWL_BACK_QUEUE_FIRST_ID);
3279
3280         ra_tid = BUILD_RAxTID(sta_id, tid);
3281
3282         /* Modify device's station table to Tx this TID */
3283         iwl4965_sta_modify_enable_tid_tx(priv, sta_id, tid);
3284
3285         spin_lock_irqsave(&priv->lock, flags);
3286         rc = iwl_grab_nic_access(priv);
3287         if (rc) {
3288                 spin_unlock_irqrestore(&priv->lock, flags);
3289                 return rc;
3290         }
3291
3292         /* Stop this Tx queue before configuring it */
3293         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
3294
3295         /* Map receiver-address / traffic-ID to this queue */
3296         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
3297
3298         /* Set this queue as a chain-building queue */
3299         iwl_set_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
3300
3301         /* Place first TFD at index corresponding to start sequence number.
3302          * Assumes that ssn_idx is valid (!= 0xFFF) */
3303         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
3304         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
3305         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
3306
3307         /* Set up Tx window size and frame limit for this queue */
3308         iwl_write_targ_mem(priv,
3309                 priv->scd_base_addr + IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
3310                 (SCD_WIN_SIZE << IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
3311                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
3312
3313         iwl_write_targ_mem(priv, priv->scd_base_addr +
3314                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
3315                 (SCD_FRAME_LIMIT << IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
3316                 & IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
3317
3318         iwl_set_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
3319
3320         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
3321         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
3322
3323         iwl_release_nic_access(priv);
3324         spin_unlock_irqrestore(&priv->lock, flags);
3325
3326         return 0;
3327 }
3328
3329 #endif /* CONFIG_IWL4965_HT */
3330
3331
3332 #ifdef CONFIG_IWL4965_HT
3333 static int iwl4965_rx_agg_start(struct iwl_priv *priv,
3334                                 const u8 *addr, int tid, u16 ssn)
3335 {
3336         unsigned long flags;
3337         int sta_id;
3338
3339         sta_id = iwl_find_station(priv, addr);
3340         if (sta_id == IWL_INVALID_STATION)
3341                 return -ENXIO;
3342
3343         spin_lock_irqsave(&priv->sta_lock, flags);
3344         priv->stations[sta_id].sta.station_flags_msk = 0;
3345         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
3346         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
3347         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
3348         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3349         spin_unlock_irqrestore(&priv->sta_lock, flags);
3350
3351         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
3352                                         CMD_ASYNC);
3353 }
3354
3355 static int iwl4965_rx_agg_stop(struct iwl_priv *priv,
3356                                const u8 *addr, int tid)
3357 {
3358         unsigned long flags;
3359         int sta_id;
3360
3361         sta_id = iwl_find_station(priv, addr);
3362         if (sta_id == IWL_INVALID_STATION)
3363                 return -ENXIO;
3364
3365         spin_lock_irqsave(&priv->sta_lock, flags);
3366         priv->stations[sta_id].sta.station_flags_msk = 0;
3367         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
3368         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
3369         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3370         spin_unlock_irqrestore(&priv->sta_lock, flags);
3371
3372         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
3373                                         CMD_ASYNC);
3374 }
3375
3376 /*
3377  * Find first available (lowest unused) Tx Queue, mark it "active".
3378  * Called only when finding queue for aggregation.
3379  * Should never return anything < 7, because they should already
3380  * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
3381  */
3382 static int iwl4965_txq_ctx_activate_free(struct iwl_priv *priv)
3383 {
3384         int txq_id;
3385
3386         for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++)
3387                 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
3388                         return txq_id;
3389         return -1;
3390 }
3391
3392 static int iwl4965_tx_agg_start(struct ieee80211_hw *hw, const u8 *ra,
3393                                 u16 tid, u16 *start_seq_num)
3394 {
3395         struct iwl_priv *priv = hw->priv;
3396         int sta_id;
3397         int tx_fifo;
3398         int txq_id;
3399         int ssn = -1;
3400         int ret = 0;
3401         unsigned long flags;
3402         struct iwl_tid_data *tid_data;
3403         DECLARE_MAC_BUF(mac);
3404
3405         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
3406                 tx_fifo = default_tid_to_tx_fifo[tid];
3407         else
3408                 return -EINVAL;
3409
3410         IWL_WARNING("%s on ra = %s tid = %d\n",
3411                         __func__, print_mac(mac, ra), tid);
3412
3413         sta_id = iwl_find_station(priv, ra);
3414         if (sta_id == IWL_INVALID_STATION)
3415                 return -ENXIO;
3416
3417         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) {
3418                 IWL_ERROR("Start AGG when state is not IWL_AGG_OFF !\n");
3419                 return -ENXIO;
3420         }
3421
3422         txq_id = iwl4965_txq_ctx_activate_free(priv);
3423         if (txq_id == -1)
3424                 return -ENXIO;
3425
3426         spin_lock_irqsave(&priv->sta_lock, flags);
3427         tid_data = &priv->stations[sta_id].tid[tid];
3428         ssn = SEQ_TO_SN(tid_data->seq_number);
3429         tid_data->agg.txq_id = txq_id;
3430         spin_unlock_irqrestore(&priv->sta_lock, flags);
3431
3432         *start_seq_num = ssn;
3433         ret = iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
3434                                           sta_id, tid, ssn);
3435         if (ret)
3436                 return ret;
3437
3438         ret = 0;
3439         if (tid_data->tfds_in_queue == 0) {
3440                 printk(KERN_ERR "HW queue is empty\n");
3441                 tid_data->agg.state = IWL_AGG_ON;
3442                 ieee80211_start_tx_ba_cb_irqsafe(hw, ra, tid);
3443         } else {
3444                 IWL_DEBUG_HT("HW queue is NOT empty: %d packets in HW queue\n",
3445                                 tid_data->tfds_in_queue);
3446                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
3447         }
3448         return ret;
3449 }
3450
3451 static int iwl4965_tx_agg_stop(struct ieee80211_hw *hw, const u8 *ra, u16 tid)
3452 {
3453         struct iwl_priv *priv = hw->priv;
3454         int tx_fifo_id, txq_id, sta_id, ssn = -1;
3455         struct iwl_tid_data *tid_data;
3456         int ret, write_ptr, read_ptr;
3457         unsigned long flags;
3458         DECLARE_MAC_BUF(mac);
3459
3460         if (!ra) {
3461                 IWL_ERROR("ra = NULL\n");
3462                 return -EINVAL;
3463         }
3464
3465         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
3466                 tx_fifo_id = default_tid_to_tx_fifo[tid];
3467         else
3468                 return -EINVAL;
3469
3470         sta_id = iwl_find_station(priv, ra);
3471
3472         if (sta_id == IWL_INVALID_STATION)
3473                 return -ENXIO;
3474
3475         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON)
3476                 IWL_WARNING("Stopping AGG while state not IWL_AGG_ON\n");
3477
3478         tid_data = &priv->stations[sta_id].tid[tid];
3479         ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
3480         txq_id = tid_data->agg.txq_id;
3481         write_ptr = priv->txq[txq_id].q.write_ptr;
3482         read_ptr = priv->txq[txq_id].q.read_ptr;
3483
3484         /* The queue is not empty */
3485         if (write_ptr != read_ptr) {
3486                 IWL_DEBUG_HT("Stopping a non empty AGG HW QUEUE\n");
3487                 priv->stations[sta_id].tid[tid].agg.state =
3488                                 IWL_EMPTYING_HW_QUEUE_DELBA;
3489                 return 0;
3490         }
3491
3492         IWL_DEBUG_HT("HW queue is empty\n");
3493         priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF;
3494
3495         spin_lock_irqsave(&priv->lock, flags);
3496         ret = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
3497         spin_unlock_irqrestore(&priv->lock, flags);
3498
3499         if (ret)
3500                 return ret;
3501
3502         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, ra, tid);
3503
3504         return 0;
3505 }
3506
3507 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
3508                              enum ieee80211_ampdu_mlme_action action,
3509                              const u8 *addr, u16 tid, u16 *ssn)
3510 {
3511         struct iwl_priv *priv = hw->priv;
3512         DECLARE_MAC_BUF(mac);
3513
3514         IWL_DEBUG_HT("A-MPDU action on addr %s tid %d\n",
3515                      print_mac(mac, addr), tid);
3516
3517         switch (action) {
3518         case IEEE80211_AMPDU_RX_START:
3519                 IWL_DEBUG_HT("start Rx\n");
3520                 return iwl4965_rx_agg_start(priv, addr, tid, *ssn);
3521         case IEEE80211_AMPDU_RX_STOP:
3522                 IWL_DEBUG_HT("stop Rx\n");
3523                 return iwl4965_rx_agg_stop(priv, addr, tid);
3524         case IEEE80211_AMPDU_TX_START:
3525                 IWL_DEBUG_HT("start Tx\n");
3526                 return iwl4965_tx_agg_start(hw, addr, tid, ssn);
3527         case IEEE80211_AMPDU_TX_STOP:
3528                 IWL_DEBUG_HT("stop Tx\n");
3529                 return iwl4965_tx_agg_stop(hw, addr, tid);
3530         default:
3531                 IWL_DEBUG_HT("unknown\n");
3532                 return -EINVAL;
3533                 break;
3534         }
3535         return 0;
3536 }
3537 #endif /* CONFIG_IWL4965_HT */
3538
3539
3540 static u16 iwl4965_get_hcmd_size(u8 cmd_id, u16 len)
3541 {
3542         switch (cmd_id) {
3543         case REPLY_RXON:
3544                 return (u16) sizeof(struct iwl4965_rxon_cmd);
3545         default:
3546                 return len;
3547         }
3548 }
3549
3550 static u16 iwl4965_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
3551 {
3552         struct iwl4965_addsta_cmd *addsta = (struct iwl4965_addsta_cmd *)data;
3553         addsta->mode = cmd->mode;
3554         memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
3555         memcpy(&addsta->key, &cmd->key, sizeof(struct iwl4965_keyinfo));
3556         addsta->station_flags = cmd->station_flags;
3557         addsta->station_flags_msk = cmd->station_flags_msk;
3558         addsta->tid_disable_tx = cmd->tid_disable_tx;
3559         addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
3560         addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
3561         addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
3562         addsta->reserved1 = __constant_cpu_to_le16(0);
3563         addsta->reserved2 = __constant_cpu_to_le32(0);
3564
3565         return (u16)sizeof(struct iwl4965_addsta_cmd);
3566 }
3567 /* Set up 4965-specific Rx frame reply handlers */
3568 static void iwl4965_rx_handler_setup(struct iwl_priv *priv)
3569 {
3570         /* Legacy Rx frames */
3571         priv->rx_handlers[REPLY_RX] = iwl4965_rx_reply_rx;
3572
3573         /* High-throughput (HT) Rx frames */
3574         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
3575         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
3576
3577         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
3578             iwl4965_rx_missed_beacon_notif;
3579
3580 #ifdef CONFIG_IWL4965_HT
3581         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
3582 #endif /* CONFIG_IWL4965_HT */
3583 }
3584
3585 void iwl4965_hw_setup_deferred_work(struct iwl_priv *priv)
3586 {
3587         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
3588 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
3589         INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
3590 #endif
3591         init_timer(&priv->statistics_periodic);
3592         priv->statistics_periodic.data = (unsigned long)priv;
3593         priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
3594 }
3595
3596 void iwl4965_hw_cancel_deferred_work(struct iwl_priv *priv)
3597 {
3598         del_timer_sync(&priv->statistics_periodic);
3599
3600         cancel_delayed_work(&priv->init_alive_start);
3601 }
3602
3603
3604 static struct iwl_hcmd_ops iwl4965_hcmd = {
3605         .rxon_assoc = iwl4965_send_rxon_assoc,
3606 };
3607
3608 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
3609         .get_hcmd_size = iwl4965_get_hcmd_size,
3610         .build_addsta_hcmd = iwl4965_build_addsta_hcmd,
3611 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
3612         .chain_noise_reset = iwl4965_chain_noise_reset,
3613         .gain_computation = iwl4965_gain_computation,
3614 #endif
3615 };
3616
3617 static struct iwl_lib_ops iwl4965_lib = {
3618         .set_hw_params = iwl4965_hw_set_hw_params,
3619         .alloc_shared_mem = iwl4965_alloc_shared_mem,
3620         .free_shared_mem = iwl4965_free_shared_mem,
3621         .shared_mem_rx_idx = iwl4965_shared_mem_rx_idx,
3622         .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
3623         .disable_tx_fifo = iwl4965_disable_tx_fifo,
3624         .rx_handler_setup = iwl4965_rx_handler_setup,
3625         .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
3626         .alive_notify = iwl4965_alive_notify,
3627         .init_alive_start = iwl4965_init_alive_start,
3628         .load_ucode = iwl4965_load_bsm,
3629         .apm_ops = {
3630                 .init = iwl4965_apm_init,
3631                 .config = iwl4965_nic_config,
3632                 .set_pwr_src = iwl4965_set_pwr_src,
3633         },
3634         .eeprom_ops = {
3635                 .regulatory_bands = {
3636                         EEPROM_REGULATORY_BAND_1_CHANNELS,
3637                         EEPROM_REGULATORY_BAND_2_CHANNELS,
3638                         EEPROM_REGULATORY_BAND_3_CHANNELS,
3639                         EEPROM_REGULATORY_BAND_4_CHANNELS,
3640                         EEPROM_REGULATORY_BAND_5_CHANNELS,
3641                         EEPROM_4965_REGULATORY_BAND_24_FAT_CHANNELS,
3642                         EEPROM_4965_REGULATORY_BAND_52_FAT_CHANNELS
3643                 },
3644                 .verify_signature  = iwlcore_eeprom_verify_signature,
3645                 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
3646                 .release_semaphore = iwlcore_eeprom_release_semaphore,
3647                 .check_version = iwl4965_eeprom_check_version,
3648                 .query_addr = iwlcore_eeprom_query_addr,
3649         },
3650         .radio_kill_sw = iwl4965_radio_kill_sw,
3651         .set_power = iwl4965_set_power,
3652         .update_chain_flags = iwl4965_update_chain_flags,
3653 };
3654
3655 static struct iwl_ops iwl4965_ops = {
3656         .lib = &iwl4965_lib,
3657         .hcmd = &iwl4965_hcmd,
3658         .utils = &iwl4965_hcmd_utils,
3659 };
3660
3661 struct iwl_cfg iwl4965_agn_cfg = {
3662         .name = "4965AGN",
3663         .fw_name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode",
3664         .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
3665         .eeprom_size = IWL4965_EEPROM_IMG_SIZE,
3666         .ops = &iwl4965_ops,
3667         .mod_params = &iwl4965_mod_params,
3668 };
3669
3670 module_param_named(antenna, iwl4965_mod_params.antenna, int, 0444);
3671 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
3672 module_param_named(disable, iwl4965_mod_params.disable, int, 0444);
3673 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
3674 module_param_named(swcrypto, iwl4965_mod_params.sw_crypto, int, 0444);
3675 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])\n");
3676 module_param_named(debug, iwl4965_mod_params.debug, int, 0444);
3677 MODULE_PARM_DESC(debug, "debug output mask");
3678 module_param_named(
3679         disable_hw_scan, iwl4965_mod_params.disable_hw_scan, int, 0444);
3680 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
3681
3682 module_param_named(queues_num, iwl4965_mod_params.num_of_queues, int, 0444);
3683 MODULE_PARM_DESC(queues_num, "number of hw queues.");
3684
3685 /* QoS */
3686 module_param_named(qos_enable, iwl4965_mod_params.enable_qos, int, 0444);
3687 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
3688 module_param_named(amsdu_size_8K, iwl4965_mod_params.amsdu_size_8K, int, 0444);
3689 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
3690 module_param_named(fw_restart4965, iwl4965_mod_params.restart_fw, int, 0444);
3691 MODULE_PARM_DESC(fw_restart4965, "restart firmware in case of error");