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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2010 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  *  Intel Linux Wireless <ilw@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/init.h>
  30 #include <linux/pci.h>
  31 #include <linux/dma-mapping.h>
  32 #include <linux/delay.h>
  33 #include <linux/sched.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-agn-calib.h"
  47 #include "iwl-sta.h"
  48 #include "iwl-agn-led.h"
  49 #include "iwl-agn.h"
  50 #include "iwl-agn-debugfs.h"
  51 #include "iwl-legacy.h"
  52
  53 static int iwl4965_send_tx_power(struct iwl_priv *priv);
  54 static int iwl4965_hw_get_temperature(struct iwl_priv *priv);
  55
  56 /* Highest firmware API version supported */
  57 #define IWL4965_UCODE_API_MAX 2
  58
  59 /* Lowest firmware API version supported */
  60 #define IWL4965_UCODE_API_MIN 2
  61
  62 #define IWL4965_FW_PRE "iwlwifi-4965-"
  63 #define _IWL4965_MODULE_FIRMWARE(api) IWL4965_FW_PRE #api ".ucode"
  64 #define IWL4965_MODULE_FIRMWARE(api) _IWL4965_MODULE_FIRMWARE(api)
  65
  66 /* check contents of special bootstrap uCode SRAM */
  67 static int iwl4965_verify_bsm(struct iwl_priv *priv)
  68 {
  69         __le32 *image = priv->ucode_boot.v_addr;
  70         u32 len = priv->ucode_boot.len;
  71         u32 reg;
  72         u32 val;
  73
  74         IWL_DEBUG_INFO(priv, "Begin verify bsm\n");
  75
  76         /* verify BSM SRAM contents */
  77         val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
  78         for (reg = BSM_SRAM_LOWER_BOUND;
  79              reg < BSM_SRAM_LOWER_BOUND + len;
  80              reg += sizeof(u32), image++) {
  81                 val = iwl_read_prph(priv, reg);
  82                 if (val != le32_to_cpu(*image)) {
  83                         IWL_ERR(priv, "BSM uCode verification failed at "
  84                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
  85                                   BSM_SRAM_LOWER_BOUND,
  86                                   reg - BSM_SRAM_LOWER_BOUND, len,
  87                                   val, le32_to_cpu(*image));
  88                         return -EIO;
  89                 }
  90         }
  91
  92         IWL_DEBUG_INFO(priv, "BSM bootstrap uCode image OK\n");
  93
  94         return 0;
  95 }
  96
  97 /**
  98  * iwl4965_load_bsm - Load bootstrap instructions
  99  *
 100  * BSM operation:
 101  *
 102  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
 103  * in special SRAM that does not power down during RFKILL.  When powering back
 104  * up after power-saving sleeps (or during initial uCode load), the BSM loads
 105  * the bootstrap program into the on-board processor, and starts it.
 106  *
 107  * The bootstrap program loads (via DMA) instructions and data for a new
 108  * program from host DRAM locations indicated by the host driver in the
 109  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
 110  * automatically.
 111  *
 112  * When initializing the NIC, the host driver points the BSM to the
 113  * "initialize" uCode image.  This uCode sets up some internal data, then
 114  * notifies host via "initialize alive" that it is complete.
 115  *
 116  * The host then replaces the BSM_DRAM_* pointer values to point to the
 117  * normal runtime uCode instructions and a backup uCode data cache buffer
 118  * (filled initially with starting data values for the on-board processor),
 119  * then triggers the "initialize" uCode to load and launch the runtime uCode,
 120  * which begins normal operation.
 121  *
 122  * When doing a power-save shutdown, runtime uCode saves data SRAM into
 123  * the backup data cache in DRAM before SRAM is powered down.
 124  *
 125  * When powering back up, the BSM loads the bootstrap program.  This reloads
 126  * the runtime uCode instructions and the backup data cache into SRAM,
 127  * and re-launches the runtime uCode from where it left off.
 128  */
 129 static int iwl4965_load_bsm(struct iwl_priv *priv)
 130 {
 131         __le32 *image = priv->ucode_boot.v_addr;
 132         u32 len = priv->ucode_boot.len;
 133         dma_addr_t pinst;
 134         dma_addr_t pdata;
 135         u32 inst_len;
 136         u32 data_len;
 137         int i;
 138         u32 done;
 139         u32 reg_offset;
 140         int ret;
 141
 142         IWL_DEBUG_INFO(priv, "Begin load bsm\n");
 143
 144         priv->ucode_type = UCODE_RT;
 145
 146         /* make sure bootstrap program is no larger than BSM's SRAM size */
 147         if (len > IWL49_MAX_BSM_SIZE)
 148                 return -EINVAL;
 149
 150         /* Tell bootstrap uCode where to find the "Initialize" uCode
 151          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
 152          * NOTE:  iwl_init_alive_start() will replace these values,
 153          *        after the "initialize" uCode has run, to point to
 154          *        runtime/protocol instructions and backup data cache.
 155          */
 156         pinst = priv->ucode_init.p_addr >> 4;
 157         pdata = priv->ucode_init_data.p_addr >> 4;
 158         inst_len = priv->ucode_init.len;
 159         data_len = priv->ucode_init_data.len;
 160
 161         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 162         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 163         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
 164         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
 165
 166         /* Fill BSM memory with bootstrap instructions */
 167         for (reg_offset = BSM_SRAM_LOWER_BOUND;
 168              reg_offset < BSM_SRAM_LOWER_BOUND + len;
 169              reg_offset += sizeof(u32), image++)
 170                 _iwl_write_prph(priv, reg_offset, le32_to_cpu(*image));
 171
 172         ret = iwl4965_verify_bsm(priv);
 173         if (ret)
 174                 return ret;
 175
 176         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
 177         iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
 178         iwl_write_prph(priv, BSM_WR_MEM_DST_REG, IWL49_RTC_INST_LOWER_BOUND);
 179         iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
 180
 181         /* Load bootstrap code into instruction SRAM now,
 182          *   to prepare to load "initialize" uCode */
 183         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);
 184
 185         /* Wait for load of bootstrap uCode to finish */
 186         for (i = 0; i < 100; i++) {
 187                 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
 188                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
 189                         break;
 190                 udelay(10);
 191         }
 192         if (i < 100)
 193                 IWL_DEBUG_INFO(priv, "BSM write complete, poll %d iterations\n", i);
 194         else {
 195                 IWL_ERR(priv, "BSM write did not complete!\n");
 196                 return -EIO;
 197         }
 198
 199         /* Enable future boot loads whenever power management unit triggers it
 200          *   (e.g. when powering back up after power-save shutdown) */
 201         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
 202
 203
 204         return 0;
 205 }
 206
 207 /**
 208  * iwl4965_set_ucode_ptrs - Set uCode address location
 209  *
 210  * Tell initialization uCode where to find runtime uCode.
 211  *
 212  * BSM registers initially contain pointers to initialization uCode.
 213  * We need to replace them to load runtime uCode inst and data,
 214  * and to save runtime data when powering down.
 215  */
 216 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
 217 {
 218         dma_addr_t pinst;
 219         dma_addr_t pdata;
 220         int ret = 0;
 221
 222         /* bits 35:4 for 4965 */
 223         pinst = priv->ucode_code.p_addr >> 4;
 224         pdata = priv->ucode_data_backup.p_addr >> 4;
 225
 226         /* Tell bootstrap uCode where to find image to load */
 227         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 228         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 229         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
 230                                  priv->ucode_data.len);
 231
 232         /* Inst byte count must be last to set up, bit 31 signals uCode
 233          *   that all new ptr/size info is in place */
 234         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
 235                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
 236         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
 237
 238         return ret;
 239 }
 240
 241 /**
 242  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
 243  *
 244  * Called after REPLY_ALIVE notification received from "initialize" uCode.
 245  *
 246  * The 4965 "initialize" ALIVE reply contains calibration data for:
 247  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
 248  *   (3945 does not contain this data).
 249  *
 250  * Tell "initialize" uCode to go ahead and load the runtime uCode.
 251 */
 252 static void iwl4965_init_alive_start(struct iwl_priv *priv)
 253 {
 254         /* Check alive response for "valid" sign from uCode */
 255         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
 256                 /* We had an error bringing up the hardware, so take it
 257                  * all the way back down so we can try again */
 258                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
 259                 goto restart;
 260         }
 261
 262         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
 263          * This is a paranoid check, because we would not have gotten the
 264          * "initialize" alive if code weren't properly loaded.  */
 265         if (iwl_verify_ucode(priv)) {
 266                 /* Runtime instruction load was bad;
 267                  * take it all the way back down so we can try again */
 268                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
 269                 goto restart;
 270         }
 271
 272         /* Calculate temperature */
 273         priv->temperature = iwl4965_hw_get_temperature(priv);
 274
 275         /* Send pointers to protocol/runtime uCode image ... init code will
 276          * load and launch runtime uCode, which will send us another "Alive"
 277          * notification. */
 278         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 279         if (iwl4965_set_ucode_ptrs(priv)) {
 280                 /* Runtime instruction load won't happen;
 281                  * take it all the way back down so we can try again */
 282                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
 283                 goto restart;
 284         }
 285         return;
 286
 287 restart:
 288         queue_work(priv->workqueue, &priv->restart);
 289 }
 290
 291 static bool is_ht40_channel(__le32 rxon_flags)
 292 {
 293         int chan_mod = le32_to_cpu(rxon_flags & RXON_FLG_CHANNEL_MODE_MSK)
 294                                     >> RXON_FLG_CHANNEL_MODE_POS;
 295         return ((chan_mod == CHANNEL_MODE_PURE_40) ||
 296                   (chan_mod == CHANNEL_MODE_MIXED));
 297 }
 298
 299 /*
 300  * EEPROM handlers
 301  */
 302 static u16 iwl4965_eeprom_calib_version(struct iwl_priv *priv)
 303 {
 304         return iwl_eeprom_query16(priv, EEPROM_4965_CALIB_VERSION_OFFSET);
 305 }
 306
 307 /*
 308  * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask
 309  * must be called under priv->lock and mac access
 310  */
 311 static void iwl4965_txq_set_sched(struct iwl_priv *priv, u32 mask)
 312 {
 313         iwl_write_prph(priv, IWL49_SCD_TXFACT, mask);
 314 }
 315
 316 static void iwl4965_nic_config(struct iwl_priv *priv)
 317 {
 318         unsigned long flags;
 319         u16 radio_cfg;
 320
 321         spin_lock_irqsave(&priv->lock, flags);
 322
 323         radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
 324
 325         /* write radio config values to register */
 326         if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) == EEPROM_4965_RF_CFG_TYPE_MAX)
 327                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 328                             EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
 329                             EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
 330                             EEPROM_RF_CFG_DASH_MSK(radio_cfg));
 331
 332         /* set CSR_HW_CONFIG_REG for uCode use */
 333         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 334                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 335                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
 336
 337         priv->calib_info = (struct iwl_eeprom_calib_info *)
 338                 iwl_eeprom_query_addr(priv, EEPROM_4965_CALIB_TXPOWER_OFFSET);
 339
 340         spin_unlock_irqrestore(&priv->lock, flags);
 341 }
 342
 343 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
 344  * Called after every association, but this runs only once!
 345  *  ... once chain noise is calibrated the first time, it's good forever.  */
 346 static void iwl4965_chain_noise_reset(struct iwl_priv *priv)
 347 {
 348         struct iwl_chain_noise_data *data = &(priv->chain_noise_data);
 349
 350         if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
 351             iwl_is_any_associated(priv)) {
 352                 struct iwl_calib_diff_gain_cmd cmd;
 353
 354                 /* clear data for chain noise calibration algorithm */
 355                 data->chain_noise_a = 0;
 356                 data->chain_noise_b = 0;
 357                 data->chain_noise_c = 0;
 358                 data->chain_signal_a = 0;
 359                 data->chain_signal_b = 0;
 360                 data->chain_signal_c = 0;
 361                 data->beacon_count = 0;
 362
 363                 memset(&cmd, 0, sizeof(cmd));
 364                 cmd.hdr.op_code = IWL_PHY_CALIBRATE_DIFF_GAIN_CMD;
 365                 cmd.diff_gain_a = 0;
 366                 cmd.diff_gain_b = 0;
 367                 cmd.diff_gain_c = 0;
 368                 if (iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 369                                  sizeof(cmd), &cmd))
 370                         IWL_ERR(priv,
 371                                 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
 372                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
 373                 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
 374         }
 375 }
 376
 377 static void iwl4965_gain_computation(struct iwl_priv *priv,
 378                 u32 *average_noise,
 379                 u16 min_average_noise_antenna_i,
 380                 u32 min_average_noise,
 381                 u8 default_chain)
 382 {
 383         int i, ret;
 384         struct iwl_chain_noise_data *data = &priv->chain_noise_data;
 385
 386         data->delta_gain_code[min_average_noise_antenna_i] = 0;
 387
 388         for (i = default_chain; i < NUM_RX_CHAINS; i++) {
 389                 s32 delta_g = 0;
 390
 391                 if (!(data->disconn_array[i]) &&
 392                     (data->delta_gain_code[i] ==
 393                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
 394                         delta_g = average_noise[i] - min_average_noise;
 395                         data->delta_gain_code[i] = (u8)((delta_g * 10) / 15);
 396                         data->delta_gain_code[i] =
 397                                 min(data->delta_gain_code[i],
 398                                 (u8) CHAIN_NOISE_MAX_DELTA_GAIN_CODE);
 399
 400                         data->delta_gain_code[i] =
 401                                 (data->delta_gain_code[i] | (1 << 2));
 402                 } else {
 403                         data->delta_gain_code[i] = 0;
 404                 }
 405         }
 406         IWL_DEBUG_CALIB(priv, "delta_gain_codes: a %d b %d c %d\n",
 407                      data->delta_gain_code[0],
 408                      data->delta_gain_code[1],
 409                      data->delta_gain_code[2]);
 410
 411         /* Differential gain gets sent to uCode only once */
 412         if (!data->radio_write) {
 413                 struct iwl_calib_diff_gain_cmd cmd;
 414                 data->radio_write = 1;
 415
 416                 memset(&cmd, 0, sizeof(cmd));
 417                 cmd.hdr.op_code = IWL_PHY_CALIBRATE_DIFF_GAIN_CMD;
 418                 cmd.diff_gain_a = data->delta_gain_code[0];
 419                 cmd.diff_gain_b = data->delta_gain_code[1];
 420                 cmd.diff_gain_c = data->delta_gain_code[2];
 421                 ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 422                                       sizeof(cmd), &cmd);
 423                 if (ret)
 424                         IWL_DEBUG_CALIB(priv, "fail sending cmd "
 425                                      "REPLY_PHY_CALIBRATION_CMD\n");
 426
 427                 /* TODO we might want recalculate
 428                  * rx_chain in rxon cmd */
 429
 430                 /* Mark so we run this algo only once! */
 431                 data->state = IWL_CHAIN_NOISE_CALIBRATED;
 432         }
 433 }
 434
 435 static void iwl4965_bg_txpower_work(struct work_struct *work)
 436 {
 437         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 438                         txpower_work);
 439
 440         /* If a scan happened to start before we got here
 441          * then just return; the statistics notification will
 442          * kick off another scheduled work to compensate for
 443          * any temperature delta we missed here. */
 444         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 445             test_bit(STATUS_SCANNING, &priv->status))
 446                 return;
 447
 448         mutex_lock(&priv->mutex);
 449
 450         /* Regardless of if we are associated, we must reconfigure the
 451          * TX power since frames can be sent on non-radar channels while
 452          * not associated */
 453         iwl4965_send_tx_power(priv);
 454
 455         /* Update last_temperature to keep is_calib_needed from running
 456          * when it isn't needed... */
 457         priv->last_temperature = priv->temperature;
 458
 459         mutex_unlock(&priv->mutex);
 460 }
 461
 462 /*
 463  * Acquire priv->lock before calling this function !
 464  */
 465 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
 466 {
 467         iwl_write_direct32(priv, HBUS_TARG_WRPTR,
 468                              (index & 0xff) | (txq_id << 8));
 469         iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(txq_id), index);
 470 }
 471
 472 /**
 473  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
 474  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
 475  * @scd_retry: (1) Indicates queue will be used in aggregation mode
 476  *
 477  * NOTE:  Acquire priv->lock before calling this function !
 478  */
 479 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
 480                                         struct iwl_tx_queue *txq,
 481                                         int tx_fifo_id, int scd_retry)
 482 {
 483         int txq_id = txq->q.id;
 484
 485         /* Find out whether to activate Tx queue */
 486         int active = test_bit(txq_id, &priv->txq_ctx_active_msk) ? 1 : 0;
 487
 488         /* Set up and activate */
 489         iwl_write_prph(priv, IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
 490                          (active << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
 491                          (tx_fifo_id << IWL49_SCD_QUEUE_STTS_REG_POS_TXF) |
 492                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_WSL) |
 493                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
 494                          IWL49_SCD_QUEUE_STTS_REG_MSK);
 495
 496         txq->sched_retry = scd_retry;
 497
 498         IWL_DEBUG_INFO(priv, "%s %s Queue %d on AC %d\n",
 499                        active ? "Activate" : "Deactivate",
 500                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
 501 }
 502
 503 static const s8 default_queue_to_tx_fifo[] = {
 504         IWL_TX_FIFO_VO,
 505         IWL_TX_FIFO_VI,
 506         IWL_TX_FIFO_BE,
 507         IWL_TX_FIFO_BK,
 508         IWL49_CMD_FIFO_NUM,
 509         IWL_TX_FIFO_UNUSED,
 510         IWL_TX_FIFO_UNUSED,
 511 };
 512
 513 static int iwl4965_alive_notify(struct iwl_priv *priv)
 514 {
 515         u32 a;
 516         unsigned long flags;
 517         int i, chan;
 518         u32 reg_val;
 519
 520         spin_lock_irqsave(&priv->lock, flags);
 521
 522         /* Clear 4965's internal Tx Scheduler data base */
 523         priv->scd_base_addr = iwl_read_prph(priv, IWL49_SCD_SRAM_BASE_ADDR);
 524         a = priv->scd_base_addr + IWL49_SCD_CONTEXT_DATA_OFFSET;
 525         for (; a < priv->scd_base_addr + IWL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
 526                 iwl_write_targ_mem(priv, a, 0);
 527         for (; a < priv->scd_base_addr + IWL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
 528                 iwl_write_targ_mem(priv, a, 0);
 529         for (; a < priv->scd_base_addr +
 530                IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(priv->hw_params.max_txq_num); a += 4)
 531                 iwl_write_targ_mem(priv, a, 0);
 532
 533         /* Tel 4965 where to find Tx byte count tables */
 534         iwl_write_prph(priv, IWL49_SCD_DRAM_BASE_ADDR,
 535                         priv->scd_bc_tbls.dma >> 10);
 536
 537         /* Enable DMA channel */
 538         for (chan = 0; chan < FH49_TCSR_CHNL_NUM ; chan++)
 539                 iwl_write_direct32(priv, FH_TCSR_CHNL_TX_CONFIG_REG(chan),
 540                                 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
 541                                 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE);
 542
 543         /* Update FH chicken bits */
 544         reg_val = iwl_read_direct32(priv, FH_TX_CHICKEN_BITS_REG);
 545         iwl_write_direct32(priv, FH_TX_CHICKEN_BITS_REG,
 546                            reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN);
 547
 548         /* Disable chain mode for all queues */
 549         iwl_write_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, 0);
 550
 551         /* Initialize each Tx queue (including the command queue) */
 552         for (i = 0; i < priv->hw_params.max_txq_num; i++) {
 553
 554                 /* TFD circular buffer read/write indexes */
 555                 iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(i), 0);
 556                 iwl_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
 557
 558                 /* Max Tx Window size for Scheduler-ACK mode */
 559                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 560                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i),
 561                                 (SCD_WIN_SIZE <<
 562                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
 563                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
 564
 565                 /* Frame limit */
 566                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 567                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
 568                                 sizeof(u32),
 569                                 (SCD_FRAME_LIMIT <<
 570                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
 571                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
 572
 573         }
 574         iwl_write_prph(priv, IWL49_SCD_INTERRUPT_MASK,
 575                                  (1 << priv->hw_params.max_txq_num) - 1);
 576
 577         /* Activate all Tx DMA/FIFO channels */
 578         priv->cfg->ops->lib->txq_set_sched(priv, IWL_MASK(0, 6));
 579
 580         iwl4965_set_wr_ptrs(priv, IWL_DEFAULT_CMD_QUEUE_NUM, 0);
 581
 582         /* make sure all queue are not stopped */
 583         memset(&priv->queue_stopped[0], 0, sizeof(priv->queue_stopped));
 584         for (i = 0; i < 4; i++)
 585                 atomic_set(&priv->queue_stop_count[i], 0);
 586
 587         /* reset to 0 to enable all the queue first */
 588         priv->txq_ctx_active_msk = 0;
 589         /* Map each Tx/cmd queue to its corresponding fifo */
 590         BUILD_BUG_ON(ARRAY_SIZE(default_queue_to_tx_fifo) != 7);
 591
 592         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
 593                 int ac = default_queue_to_tx_fifo[i];
 594
 595                 iwl_txq_ctx_activate(priv, i);
 596
 597                 if (ac == IWL_TX_FIFO_UNUSED)
 598                         continue;
 599
 600                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
 601         }
 602
 603         spin_unlock_irqrestore(&priv->lock, flags);
 604
 605         return 0;
 606 }
 607
 608 static struct iwl_sensitivity_ranges iwl4965_sensitivity = {
 609         .min_nrg_cck = 97,
 610         .max_nrg_cck = 0, /* not used, set to 0 */
 611
 612         .auto_corr_min_ofdm = 85,
 613         .auto_corr_min_ofdm_mrc = 170,
 614         .auto_corr_min_ofdm_x1 = 105,
 615         .auto_corr_min_ofdm_mrc_x1 = 220,
 616
 617         .auto_corr_max_ofdm = 120,
 618         .auto_corr_max_ofdm_mrc = 210,
 619         .auto_corr_max_ofdm_x1 = 140,
 620         .auto_corr_max_ofdm_mrc_x1 = 270,
 621
 622         .auto_corr_min_cck = 125,
 623         .auto_corr_max_cck = 200,
 624         .auto_corr_min_cck_mrc = 200,
 625         .auto_corr_max_cck_mrc = 400,
 626
 627         .nrg_th_cck = 100,
 628         .nrg_th_ofdm = 100,
 629
 630         .barker_corr_th_min = 190,
 631         .barker_corr_th_min_mrc = 390,
 632         .nrg_th_cca = 62,
 633 };
 634
 635 static void iwl4965_set_ct_threshold(struct iwl_priv *priv)
 636 {
 637         /* want Kelvin */
 638         priv->hw_params.ct_kill_threshold =
 639                 CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY);
 640 }
 641
 642 /**
 643  * iwl4965_hw_set_hw_params
 644  *
 645  * Called when initializing driver
 646  */
 647 static int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
 648 {
 649         if (priv->cfg->mod_params->num_of_queues >= IWL_MIN_NUM_QUEUES &&
 650             priv->cfg->mod_params->num_of_queues <= IWL49_NUM_QUEUES)
 651                 priv->cfg->base_params->num_of_queues =
 652                         priv->cfg->mod_params->num_of_queues;
 653
 654         priv->hw_params.max_txq_num = priv->cfg->base_params->num_of_queues;
 655         priv->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM;
 656         priv->hw_params.scd_bc_tbls_size =
 657                         priv->cfg->base_params->num_of_queues *
 658                         sizeof(struct iwl4965_scd_bc_tbl);
 659         priv->hw_params.tfd_size = sizeof(struct iwl_tfd);
 660         priv->hw_params.max_stations = IWL4965_STATION_COUNT;
 661         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWL4965_BROADCAST_ID;
 662         priv->hw_params.max_data_size = IWL49_RTC_DATA_SIZE;
 663         priv->hw_params.max_inst_size = IWL49_RTC_INST_SIZE;
 664         priv->hw_params.max_bsm_size = BSM_SRAM_SIZE;
 665         priv->hw_params.ht40_channel = BIT(IEEE80211_BAND_5GHZ);
 666
 667         priv->hw_params.rx_wrt_ptr_reg = FH_RSCSR_CHNL0_WPTR;
 668
 669         priv->hw_params.tx_chains_num = num_of_ant(priv->cfg->valid_tx_ant);
 670         priv->hw_params.rx_chains_num = num_of_ant(priv->cfg->valid_rx_ant);
 671         priv->hw_params.valid_tx_ant = priv->cfg->valid_tx_ant;
 672         priv->hw_params.valid_rx_ant = priv->cfg->valid_rx_ant;
 673
 674         iwl4965_set_ct_threshold(priv);
 675
 676         priv->hw_params.sens = &iwl4965_sensitivity;
 677         priv->hw_params.beacon_time_tsf_bits = IWLAGN_EXT_BEACON_TIME_POS;
 678
 679         return 0;
 680 }
 681
 682 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
 683 {
 684         s32 sign = 1;
 685
 686         if (num < 0) {
 687                 sign = -sign;
 688                 num = -num;
 689         }
 690         if (denom < 0) {
 691                 sign = -sign;
 692                 denom = -denom;
 693         }
 694         *res = 1;
 695         *res = ((num * 2 + denom) / (denom * 2)) * sign;
 696
 697         return 1;
 698 }
 699
 700 /**
 701  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
 702  *
 703  * Determines power supply voltage compensation for txpower calculations.
 704  * Returns number of 1/2-dB steps to subtract from gain table index,
 705  * to compensate for difference between power supply voltage during
 706  * factory measurements, vs. current power supply voltage.
 707  *
 708  * Voltage indication is higher for lower voltage.
 709  * Lower voltage requires more gain (lower gain table index).
 710  */
 711 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
 712                                             s32 current_voltage)
 713 {
 714         s32 comp = 0;
 715
 716         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
 717             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
 718                 return 0;
 719
 720         iwl4965_math_div_round(current_voltage - eeprom_voltage,
 721                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
 722
 723         if (current_voltage > eeprom_voltage)
 724                 comp *= 2;
 725         if ((comp < -2) || (comp > 2))
 726                 comp = 0;
 727
 728         return comp;
 729 }
 730
 731 static s32 iwl4965_get_tx_atten_grp(u16 channel)
 732 {
 733         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
 734             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
 735                 return CALIB_CH_GROUP_5;
 736
 737         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
 738             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
 739                 return CALIB_CH_GROUP_1;
 740
 741         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
 742             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
 743                 return CALIB_CH_GROUP_2;
 744
 745         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
 746             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
 747                 return CALIB_CH_GROUP_3;
 748
 749         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
 750             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
 751                 return CALIB_CH_GROUP_4;
 752
 753         return -1;
 754 }
 755
 756 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
 757 {
 758         s32 b = -1;
 759
 760         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
 761                 if (priv->calib_info->band_info[b].ch_from == 0)
 762                         continue;
 763
 764                 if ((channel >= priv->calib_info->band_info[b].ch_from)
 765                     && (channel <= priv->calib_info->band_info[b].ch_to))
 766                         break;
 767         }
 768
 769         return b;
 770 }
 771
 772 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
 773 {
 774         s32 val;
 775
 776         if (x2 == x1)
 777                 return y1;
 778         else {
 779                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
 780                 return val + y2;
 781         }
 782 }
 783
 784 /**
 785  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
 786  *
 787  * Interpolates factory measurements from the two sample channels within a
 788  * sub-band, to apply to channel of interest.  Interpolation is proportional to
 789  * differences in channel frequencies, which is proportional to differences
 790  * in channel number.
 791  */
 792 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
 793                                     struct iwl_eeprom_calib_ch_info *chan_info)
 794 {
 795         s32 s = -1;
 796         u32 c;
 797         u32 m;
 798         const struct iwl_eeprom_calib_measure *m1;
 799         const struct iwl_eeprom_calib_measure *m2;
 800         struct iwl_eeprom_calib_measure *omeas;
 801         u32 ch_i1;
 802         u32 ch_i2;
 803
 804         s = iwl4965_get_sub_band(priv, channel);
 805         if (s >= EEPROM_TX_POWER_BANDS) {
 806                 IWL_ERR(priv, "Tx Power can not find channel %d\n", channel);
 807                 return -1;
 808         }
 809
 810         ch_i1 = priv->calib_info->band_info[s].ch1.ch_num;
 811         ch_i2 = priv->calib_info->band_info[s].ch2.ch_num;
 812         chan_info->ch_num = (u8) channel;
 813
 814         IWL_DEBUG_TXPOWER(priv, "channel %d subband %d factory cal ch %d & %d\n",
 815                           channel, s, ch_i1, ch_i2);
 816
 817         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
 818                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
 819                         m1 = &(priv->calib_info->band_info[s].ch1.
 820                                measurements[c][m]);
 821                         m2 = &(priv->calib_info->band_info[s].ch2.
 822                                measurements[c][m]);
 823                         omeas = &(chan_info->measurements[c][m]);
 824
 825                         omeas->actual_pow =
 826                             (u8) iwl4965_interpolate_value(channel, ch_i1,
 827                                                            m1->actual_pow,
 828                                                            ch_i2,
 829                                                            m2->actual_pow);
 830                         omeas->gain_idx =
 831                             (u8) iwl4965_interpolate_value(channel, ch_i1,
 832                                                            m1->gain_idx, ch_i2,
 833                                                            m2->gain_idx);
 834                         omeas->temperature =
 835                             (u8) iwl4965_interpolate_value(channel, ch_i1,
 836                                                            m1->temperature,
 837                                                            ch_i2,
 838                                                            m2->temperature);
 839                         omeas->pa_det =
 840                             (s8) iwl4965_interpolate_value(channel, ch_i1,
 841                                                            m1->pa_det, ch_i2,
 842                                                            m2->pa_det);
 843
 844                         IWL_DEBUG_TXPOWER(priv,
 845                                 "chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
 846                                 m1->actual_pow, m2->actual_pow, omeas->actual_pow);
 847                         IWL_DEBUG_TXPOWER(priv,
 848                                 "chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
 849                                 m1->gain_idx, m2->gain_idx, omeas->gain_idx);
 850                         IWL_DEBUG_TXPOWER(priv,
 851                                 "chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
 852                                 m1->pa_det, m2->pa_det, omeas->pa_det);
 853                         IWL_DEBUG_TXPOWER(priv,
 854                                 "chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
 855                                 m1->temperature, m2->temperature,
 856                                 omeas->temperature);
 857                 }
 858         }
 859
 860         return 0;
 861 }
 862
 863 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
 864  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
 865 static s32 back_off_table[] = {
 866         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
 867         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
 868         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
 869         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
 870         10                      /* CCK */
 871 };
 872
 873 /* Thermal compensation values for txpower for various frequency ranges ...
 874  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
 875 static struct iwl4965_txpower_comp_entry {
 876         s32 degrees_per_05db_a;
 877         s32 degrees_per_05db_a_denom;
 878 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
 879         {9, 2},                 /* group 0 5.2, ch  34-43 */
 880         {4, 1},                 /* group 1 5.2, ch  44-70 */
 881         {4, 1},                 /* group 2 5.2, ch  71-124 */
 882         {4, 1},                 /* group 3 5.2, ch 125-200 */
 883         {3, 1}                  /* group 4 2.4, ch   all */
 884 };
 885
 886 static s32 get_min_power_index(s32 rate_power_index, u32 band)
 887 {
 888         if (!band) {
 889                 if ((rate_power_index & 7) <= 4)
 890                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
 891         }
 892         return MIN_TX_GAIN_INDEX;
 893 }
 894
 895 struct gain_entry {
 896         u8 dsp;
 897         u8 radio;
 898 };
 899
 900 static const struct gain_entry gain_table[2][108] = {
 901         /* 5.2GHz power gain index table */
 902         {
 903          {123, 0x3F},           /* highest txpower */
 904          {117, 0x3F},
 905          {110, 0x3F},
 906          {104, 0x3F},
 907          {98, 0x3F},
 908          {110, 0x3E},
 909          {104, 0x3E},
 910          {98, 0x3E},
 911          {110, 0x3D},
 912          {104, 0x3D},
 913          {98, 0x3D},
 914          {110, 0x3C},
 915          {104, 0x3C},
 916          {98, 0x3C},
 917          {110, 0x3B},
 918          {104, 0x3B},
 919          {98, 0x3B},
 920          {110, 0x3A},
 921          {104, 0x3A},
 922          {98, 0x3A},
 923          {110, 0x39},
 924          {104, 0x39},
 925          {98, 0x39},
 926          {110, 0x38},
 927          {104, 0x38},
 928          {98, 0x38},
 929          {110, 0x37},
 930          {104, 0x37},
 931          {98, 0x37},
 932          {110, 0x36},
 933          {104, 0x36},
 934          {98, 0x36},
 935          {110, 0x35},
 936          {104, 0x35},
 937          {98, 0x35},
 938          {110, 0x34},
 939          {104, 0x34},
 940          {98, 0x34},
 941          {110, 0x33},
 942          {104, 0x33},
 943          {98, 0x33},
 944          {110, 0x32},
 945          {104, 0x32},
 946          {98, 0x32},
 947          {110, 0x31},
 948          {104, 0x31},
 949          {98, 0x31},
 950          {110, 0x30},
 951          {104, 0x30},
 952          {98, 0x30},
 953          {110, 0x25},
 954          {104, 0x25},
 955          {98, 0x25},
 956          {110, 0x24},
 957          {104, 0x24},
 958          {98, 0x24},
 959          {110, 0x23},
 960          {104, 0x23},
 961          {98, 0x23},
 962          {110, 0x22},
 963          {104, 0x18},
 964          {98, 0x18},
 965          {110, 0x17},
 966          {104, 0x17},
 967          {98, 0x17},
 968          {110, 0x16},
 969          {104, 0x16},
 970          {98, 0x16},
 971          {110, 0x15},
 972          {104, 0x15},
 973          {98, 0x15},
 974          {110, 0x14},
 975          {104, 0x14},
 976          {98, 0x14},
 977          {110, 0x13},
 978          {104, 0x13},
 979          {98, 0x13},
 980          {110, 0x12},
 981          {104, 0x08},
 982          {98, 0x08},
 983          {110, 0x07},
 984          {104, 0x07},
 985          {98, 0x07},
 986          {110, 0x06},
 987          {104, 0x06},
 988          {98, 0x06},
 989          {110, 0x05},
 990          {104, 0x05},
 991          {98, 0x05},
 992          {110, 0x04},
 993          {104, 0x04},
 994          {98, 0x04},
 995          {110, 0x03},
 996          {104, 0x03},
 997          {98, 0x03},
 998          {110, 0x02},
 999          {104, 0x02},
1000          {98, 0x02},
1001          {110, 0x01},
1002          {104, 0x01},
1003          {98, 0x01},
1004          {110, 0x00},
1005          {104, 0x00},
1006          {98, 0x00},
1007          {93, 0x00},
1008          {88, 0x00},
1009          {83, 0x00},
1010          {78, 0x00},
1011          },
1012         /* 2.4GHz power gain index table */
1013         {
1014          {110, 0x3f},           /* highest txpower */
1015          {104, 0x3f},
1016          {98, 0x3f},
1017          {110, 0x3e},
1018          {104, 0x3e},
1019          {98, 0x3e},
1020          {110, 0x3d},
1021          {104, 0x3d},
1022          {98, 0x3d},
1023          {110, 0x3c},
1024          {104, 0x3c},
1025          {98, 0x3c},
1026          {110, 0x3b},
1027          {104, 0x3b},
1028          {98, 0x3b},
1029          {110, 0x3a},
1030          {104, 0x3a},
1031          {98, 0x3a},
1032          {110, 0x39},
1033          {104, 0x39},
1034          {98, 0x39},
1035          {110, 0x38},
1036          {104, 0x38},
1037          {98, 0x38},
1038          {110, 0x37},
1039          {104, 0x37},
1040          {98, 0x37},
1041          {110, 0x36},
1042          {104, 0x36},
1043          {98, 0x36},
1044          {110, 0x35},
1045          {104, 0x35},
1046          {98, 0x35},
1047          {110, 0x34},
1048          {104, 0x34},
1049          {98, 0x34},
1050          {110, 0x33},
1051          {104, 0x33},
1052          {98, 0x33},
1053          {110, 0x32},
1054          {104, 0x32},
1055          {98, 0x32},
1056          {110, 0x31},
1057          {104, 0x31},
1058          {98, 0x31},
1059          {110, 0x30},
1060          {104, 0x30},
1061          {98, 0x30},
1062          {110, 0x6},
1063          {104, 0x6},
1064          {98, 0x6},
1065          {110, 0x5},
1066          {104, 0x5},
1067          {98, 0x5},
1068          {110, 0x4},
1069          {104, 0x4},
1070          {98, 0x4},
1071          {110, 0x3},
1072          {104, 0x3},
1073          {98, 0x3},
1074          {110, 0x2},
1075          {104, 0x2},
1076          {98, 0x2},
1077          {110, 0x1},
1078          {104, 0x1},
1079          {98, 0x1},
1080          {110, 0x0},
1081          {104, 0x0},
1082          {98, 0x0},
1083          {97, 0},
1084          {96, 0},
1085          {95, 0},
1086          {94, 0},
1087          {93, 0},
1088          {92, 0},
1089          {91, 0},
1090          {90, 0},
1091          {89, 0},
1092          {88, 0},
1093          {87, 0},
1094          {86, 0},
1095          {85, 0},
1096          {84, 0},
1097          {83, 0},
1098          {82, 0},
1099          {81, 0},
1100          {80, 0},
1101          {79, 0},
1102          {78, 0},
1103          {77, 0},
1104          {76, 0},
1105          {75, 0},
1106          {74, 0},
1107          {73, 0},
1108          {72, 0},
1109          {71, 0},
1110          {70, 0},
1111          {69, 0},
1112          {68, 0},
1113          {67, 0},
1114          {66, 0},
1115          {65, 0},
1116          {64, 0},
1117          {63, 0},
1118          {62, 0},
1119          {61, 0},
1120          {60, 0},
1121          {59, 0},
1122          }
1123 };
1124
1125 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
1126                                     u8 is_ht40, u8 ctrl_chan_high,
1127                                     struct iwl4965_tx_power_db *tx_power_tbl)
1128 {
1129         u8 saturation_power;
1130         s32 target_power;
1131         s32 user_target_power;
1132         s32 power_limit;
1133         s32 current_temp;
1134         s32 reg_limit;
1135         s32 current_regulatory;
1136         s32 txatten_grp = CALIB_CH_GROUP_MAX;
1137         int i;
1138         int c;
1139         const struct iwl_channel_info *ch_info = NULL;
1140         struct iwl_eeprom_calib_ch_info ch_eeprom_info;
1141         const struct iwl_eeprom_calib_measure *measurement;
1142         s16 voltage;
1143         s32 init_voltage;
1144         s32 voltage_compensation;
1145         s32 degrees_per_05db_num;
1146         s32 degrees_per_05db_denom;
1147         s32 factory_temp;
1148         s32 temperature_comp[2];
1149         s32 factory_gain_index[2];
1150         s32 factory_actual_pwr[2];
1151         s32 power_index;
1152
1153         /* tx_power_user_lmt is in dBm, convert to half-dBm (half-dB units
1154          *   are used for indexing into txpower table) */
1155         user_target_power = 2 * priv->tx_power_user_lmt;
1156
1157         /* Get current (RXON) channel, band, width */
1158         IWL_DEBUG_TXPOWER(priv, "chan %d band %d is_ht40 %d\n", channel, band,
1159                           is_ht40);
1160
1161         ch_info = iwl_get_channel_info(priv, priv->band, channel);
1162
1163         if (!is_channel_valid(ch_info))
1164                 return -EINVAL;
1165
1166         /* get txatten group, used to select 1) thermal txpower adjustment
1167          *   and 2) mimo txpower balance between Tx chains. */
1168         txatten_grp = iwl4965_get_tx_atten_grp(channel);
1169         if (txatten_grp < 0) {
1170                 IWL_ERR(priv, "Can't find txatten group for channel %d.\n",
1171                           channel);
1172                 return -EINVAL;
1173         }
1174
1175         IWL_DEBUG_TXPOWER(priv, "channel %d belongs to txatten group %d\n",
1176                           channel, txatten_grp);
1177
1178         if (is_ht40) {
1179                 if (ctrl_chan_high)
1180                         channel -= 2;
1181                 else
1182                         channel += 2;
1183         }
1184
1185         /* hardware txpower limits ...
1186          * saturation (clipping distortion) txpowers are in half-dBm */
1187         if (band)
1188                 saturation_power = priv->calib_info->saturation_power24;
1189         else
1190                 saturation_power = priv->calib_info->saturation_power52;
1191
1192         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
1193             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
1194                 if (band)
1195                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
1196                 else
1197                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
1198         }
1199
1200         /* regulatory txpower limits ... reg_limit values are in half-dBm,
1201          *   max_power_avg values are in dBm, convert * 2 */
1202         if (is_ht40)
1203                 reg_limit = ch_info->ht40_max_power_avg * 2;
1204         else
1205                 reg_limit = ch_info->max_power_avg * 2;
1206
1207         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
1208             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
1209                 if (band)
1210                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
1211                 else
1212                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
1213         }
1214
1215         /* Interpolate txpower calibration values for this channel,
1216          *   based on factory calibration tests on spaced channels. */
1217         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
1218
1219         /* calculate tx gain adjustment based on power supply voltage */
1220         voltage = le16_to_cpu(priv->calib_info->voltage);
1221         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
1222         voltage_compensation =
1223             iwl4965_get_voltage_compensation(voltage, init_voltage);
1224
1225         IWL_DEBUG_TXPOWER(priv, "curr volt %d eeprom volt %d volt comp %d\n",
1226                           init_voltage,
1227                           voltage, voltage_compensation);
1228
1229         /* get current temperature (Celsius) */
1230         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
1231         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
1232         current_temp = KELVIN_TO_CELSIUS(current_temp);
1233
1234         /* select thermal txpower adjustment params, based on channel group
1235          *   (same frequency group used for mimo txatten adjustment) */
1236         degrees_per_05db_num =
1237             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
1238         degrees_per_05db_denom =
1239             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
1240
1241         /* get per-chain txpower values from factory measurements */
1242         for (c = 0; c < 2; c++) {
1243                 measurement = &ch_eeprom_info.measurements[c][1];
1244
1245                 /* txgain adjustment (in half-dB steps) based on difference
1246                  *   between factory and current temperature */
1247                 factory_temp = measurement->temperature;
1248                 iwl4965_math_div_round((current_temp - factory_temp) *
1249                                        degrees_per_05db_denom,
1250                                        degrees_per_05db_num,
1251                                        &temperature_comp[c]);
1252
1253                 factory_gain_index[c] = measurement->gain_idx;
1254                 factory_actual_pwr[c] = measurement->actual_pow;
1255
1256                 IWL_DEBUG_TXPOWER(priv, "chain = %d\n", c);
1257                 IWL_DEBUG_TXPOWER(priv, "fctry tmp %d, "
1258                                   "curr tmp %d, comp %d steps\n",
1259                                   factory_temp, current_temp,
1260                                   temperature_comp[c]);
1261
1262                 IWL_DEBUG_TXPOWER(priv, "fctry idx %d, fctry pwr %d\n",
1263                                   factory_gain_index[c],
1264                                   factory_actual_pwr[c]);
1265         }
1266
1267         /* for each of 33 bit-rates (including 1 for CCK) */
1268         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
1269                 u8 is_mimo_rate;
1270                 union iwl4965_tx_power_dual_stream tx_power;
1271
1272                 /* for mimo, reduce each chain's txpower by half
1273                  * (3dB, 6 steps), so total output power is regulatory
1274                  * compliant. */
1275                 if (i & 0x8) {
1276                         current_regulatory = reg_limit -
1277                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
1278                         is_mimo_rate = 1;
1279                 } else {
1280                         current_regulatory = reg_limit;
1281                         is_mimo_rate = 0;
1282                 }
1283
1284                 /* find txpower limit, either hardware or regulatory */
1285                 power_limit = saturation_power - back_off_table[i];
1286                 if (power_limit > current_regulatory)
1287                         power_limit = current_regulatory;
1288
1289                 /* reduce user's txpower request if necessary
1290                  * for this rate on this channel */
1291                 target_power = user_target_power;
1292                 if (target_power > power_limit)
1293                         target_power = power_limit;
1294
1295                 IWL_DEBUG_TXPOWER(priv, "rate %d sat %d reg %d usr %d tgt %d\n",
1296                                   i, saturation_power - back_off_table[i],
1297                                   current_regulatory, user_target_power,
1298                                   target_power);
1299
1300                 /* for each of 2 Tx chains (radio transmitters) */
1301                 for (c = 0; c < 2; c++) {
1302                         s32 atten_value;
1303
1304                         if (is_mimo_rate)
1305                                 atten_value =
1306                                     (s32)le32_to_cpu(priv->card_alive_init.
1307                                     tx_atten[txatten_grp][c]);
1308                         else
1309                                 atten_value = 0;
1310
1311                         /* calculate index; higher index means lower txpower */
1312                         power_index = (u8) (factory_gain_index[c] -
1313                                             (target_power -
1314                                              factory_actual_pwr[c]) -
1315                                             temperature_comp[c] -
1316                                             voltage_compensation +
1317                                             atten_value);
1318
1319 /*                      IWL_DEBUG_TXPOWER(priv, "calculated txpower index %d\n",
1320                                                 power_index); */
1321
1322                         if (power_index < get_min_power_index(i, band))
1323                                 power_index = get_min_power_index(i, band);
1324
1325                         /* adjust 5 GHz index to support negative indexes */
1326                         if (!band)
1327                                 power_index += 9;
1328
1329                         /* CCK, rate 32, reduce txpower for CCK */
1330                         if (i == POWER_TABLE_CCK_ENTRY)
1331                                 power_index +=
1332                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
1333
1334                         /* stay within the table! */
1335                         if (power_index > 107) {
1336                                 IWL_WARN(priv, "txpower index %d > 107\n",
1337                                             power_index);
1338                                 power_index = 107;
1339                         }
1340                         if (power_index < 0) {
1341                                 IWL_WARN(priv, "txpower index %d < 0\n",
1342                                             power_index);
1343                                 power_index = 0;
1344                         }
1345
1346                         /* fill txpower command for this rate/chain */
1347                         tx_power.s.radio_tx_gain[c] =
1348                                 gain_table[band][power_index].radio;
1349                         tx_power.s.dsp_predis_atten[c] =
1350                                 gain_table[band][power_index].dsp;
1351
1352                         IWL_DEBUG_TXPOWER(priv, "chain %d mimo %d index %d "
1353                                           "gain 0x%02x dsp %d\n",
1354                                           c, atten_value, power_index,
1355                                         tx_power.s.radio_tx_gain[c],
1356                                         tx_power.s.dsp_predis_atten[c]);
1357                 } /* for each chain */
1358
1359                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
1360
1361         } /* for each rate */
1362
1363         return 0;
1364 }
1365
1366 /**
1367  * iwl4965_send_tx_power - Configure the TXPOWER level user limit
1368  *
1369  * Uses the active RXON for channel, band, and characteristics (ht40, high)
1370  * The power limit is taken from priv->tx_power_user_lmt.
1371  */
1372 static int iwl4965_send_tx_power(struct iwl_priv *priv)
1373 {
1374         struct iwl4965_txpowertable_cmd cmd = { 0 };
1375         int ret;
1376         u8 band = 0;
1377         bool is_ht40 = false;
1378         u8 ctrl_chan_high = 0;
1379         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1380
1381         if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
1382                       "TX Power requested while scanning!\n"))
1383                 return -EAGAIN;
1384
1385         band = priv->band == IEEE80211_BAND_2GHZ;
1386
1387         is_ht40 = is_ht40_channel(ctx->active.flags);
1388
1389         if (is_ht40 && (ctx->active.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1390                 ctrl_chan_high = 1;
1391
1392         cmd.band = band;
1393         cmd.channel = ctx->active.channel;
1394
1395         ret = iwl4965_fill_txpower_tbl(priv, band,
1396                                 le16_to_cpu(ctx->active.channel),
1397                                 is_ht40, ctrl_chan_high, &cmd.tx_power);
1398         if (ret)
1399                 goto out;
1400
1401         ret = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
1402
1403 out:
1404         return ret;
1405 }
1406
1407 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv,
1408                                    struct iwl_rxon_context *ctx)
1409 {
1410         int ret = 0;
1411         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1412         const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
1413         const struct iwl_rxon_cmd *rxon2 = &ctx->active;
1414
1415         if ((rxon1->flags == rxon2->flags) &&
1416             (rxon1->filter_flags == rxon2->filter_flags) &&
1417             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1418             (rxon1->ofdm_ht_single_stream_basic_rates ==
1419              rxon2->ofdm_ht_single_stream_basic_rates) &&
1420             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1421              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1422             (rxon1->rx_chain == rxon2->rx_chain) &&
1423             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1424                 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC.  Not resending.\n");
1425                 return 0;
1426         }
1427
1428         rxon_assoc.flags = ctx->staging.flags;
1429         rxon_assoc.filter_flags = ctx->staging.filter_flags;
1430         rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
1431         rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
1432         rxon_assoc.reserved = 0;
1433         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1434             ctx->staging.ofdm_ht_single_stream_basic_rates;
1435         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1436             ctx->staging.ofdm_ht_dual_stream_basic_rates;
1437         rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
1438
1439         ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
1440                                      sizeof(rxon_assoc), &rxon_assoc, NULL);
1441         if (ret)
1442                 return ret;
1443
1444         return ret;
1445 }
1446
1447 static int iwl4965_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1448 {
1449         /* cast away the const for active_rxon in this function */
1450         struct iwl_rxon_cmd *active_rxon = (void *)&ctx->active;
1451         int ret;
1452         bool new_assoc =
1453                 !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
1454
1455         if (!iwl_is_alive(priv))
1456                 return -EBUSY;
1457
1458         if (!ctx->is_active)
1459                 return 0;
1460
1461         /* always get timestamp with Rx frame */
1462         ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
1463
1464         ret = iwl_check_rxon_cmd(priv, ctx);
1465         if (ret) {
1466                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
1467                 return -EINVAL;
1468         }
1469
1470         /*
1471          * receive commit_rxon request
1472          * abort any previous channel switch if still in process
1473          */
1474         if (priv->switch_rxon.switch_in_progress &&
1475             (priv->switch_rxon.channel != ctx->staging.channel)) {
1476                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
1477                       le16_to_cpu(priv->switch_rxon.channel));
1478                 iwl_chswitch_done(priv, false);
1479         }
1480
1481         /* If we don't need to send a full RXON, we can use
1482          * iwl_rxon_assoc_cmd which is used to reconfigure filter
1483          * and other flags for the current radio configuration. */
1484         if (!iwl_full_rxon_required(priv, ctx)) {
1485                 ret = iwl_send_rxon_assoc(priv, ctx);
1486                 if (ret) {
1487                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
1488                         return ret;
1489                 }
1490
1491                 memcpy(active_rxon, &ctx->staging, sizeof(*active_rxon));
1492                 iwl_print_rx_config_cmd(priv, ctx);
1493                 return 0;
1494         }
1495
1496         /* If we are currently associated and the new config requires
1497          * an RXON_ASSOC and the new config wants the associated mask enabled,
1498          * we must clear the associated from the active configuration
1499          * before we apply the new config */
1500         if (iwl_is_associated_ctx(ctx) && new_assoc) {
1501                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
1502                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1503
1504                 ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd,
1505                                        sizeof(struct iwl_rxon_cmd),
1506                                        active_rxon);
1507
1508                 /* If the mask clearing failed then we set
1509                  * active_rxon back to what it was previously */
1510                 if (ret) {
1511                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1512                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
1513                         return ret;
1514                 }
1515                 iwl_clear_ucode_stations(priv, ctx);
1516                 iwl_restore_stations(priv, ctx);
1517                 ret = iwl_restore_default_wep_keys(priv, ctx);
1518                 if (ret) {
1519                         IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
1520                         return ret;
1521                 }
1522         }
1523
1524         IWL_DEBUG_INFO(priv, "Sending RXON\n"
1525                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1526                        "* channel = %d\n"
1527                        "* bssid = %pM\n",
1528                        (new_assoc ? "" : "out"),
1529                        le16_to_cpu(ctx->staging.channel),
1530                        ctx->staging.bssid_addr);
1531
1532         iwl_set_rxon_hwcrypto(priv, ctx, !priv->cfg->mod_params->sw_crypto);
1533
1534         /* Apply the new configuration
1535          * RXON unassoc clears the station table in uCode so restoration of
1536          * stations is needed after it (the RXON command) completes
1537          */
1538         if (!new_assoc) {
1539                 ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd,
1540                               sizeof(struct iwl_rxon_cmd), &ctx->staging);
1541                 if (ret) {
1542                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
1543                         return ret;
1544                 }
1545                 IWL_DEBUG_INFO(priv, "Return from !new_assoc RXON.\n");
1546                 memcpy(active_rxon, &ctx->staging, sizeof(*active_rxon));
1547                 iwl_clear_ucode_stations(priv, ctx);
1548                 iwl_restore_stations(priv, ctx);
1549                 ret = iwl_restore_default_wep_keys(priv, ctx);
1550                 if (ret) {
1551                         IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
1552                         return ret;
1553                 }
1554         }
1555         if (new_assoc) {
1556                 priv->start_calib = 0;
1557                 /* Apply the new configuration
1558                  * RXON assoc doesn't clear the station table in uCode,
1559                  */
1560                 ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd,
1561                               sizeof(struct iwl_rxon_cmd), &ctx->staging);
1562                 if (ret) {
1563                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
1564                         return ret;
1565                 }
1566                 memcpy(active_rxon, &ctx->staging, sizeof(*active_rxon));
1567         }
1568         iwl_print_rx_config_cmd(priv, ctx);
1569
1570         iwl_init_sensitivity(priv);
1571
1572         /* If we issue a new RXON command which required a tune then we must
1573          * send a new TXPOWER command or we won't be able to Tx any frames */
1574         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
1575         if (ret) {
1576                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
1577                 return ret;
1578         }
1579
1580         return 0;
1581 }
1582
1583 static int iwl4965_hw_channel_switch(struct iwl_priv *priv,
1584                                      struct ieee80211_channel_switch *ch_switch)
1585 {
1586         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1587         int rc;
1588         u8 band = 0;
1589         bool is_ht40 = false;
1590         u8 ctrl_chan_high = 0;
1591         struct iwl4965_channel_switch_cmd cmd;
1592         const struct iwl_channel_info *ch_info;
1593         u32 switch_time_in_usec, ucode_switch_time;
1594         u16 ch;
1595         u32 tsf_low;
1596         u8 switch_count;
1597         u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
1598         struct ieee80211_vif *vif = ctx->vif;
1599         band = priv->band == IEEE80211_BAND_2GHZ;
1600
1601         is_ht40 = is_ht40_channel(ctx->staging.flags);
1602
1603         if (is_ht40 &&
1604             (ctx->staging.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1605                 ctrl_chan_high = 1;
1606
1607         cmd.band = band;
1608         cmd.expect_beacon = 0;
1609         ch = ch_switch->channel->hw_value;
1610         cmd.channel = cpu_to_le16(ch);
1611         cmd.rxon_flags = ctx->staging.flags;
1612         cmd.rxon_filter_flags = ctx->staging.filter_flags;
1613         switch_count = ch_switch->count;
1614         tsf_low = ch_switch->timestamp & 0x0ffffffff;
1615         /*
1616          * calculate the ucode channel switch time
1617          * adding TSF as one of the factor for when to switch
1618          */
1619         if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
1620                 if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
1621                     beacon_interval)) {
1622                         switch_count -= (priv->ucode_beacon_time -
1623                                 tsf_low) / beacon_interval;
1624                 } else
1625                         switch_count = 0;
1626         }
1627         if (switch_count <= 1)
1628                 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
1629         else {
1630                 switch_time_in_usec =
1631                         vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
1632                 ucode_switch_time = iwl_usecs_to_beacons(priv,
1633                                                          switch_time_in_usec,
1634                                                          beacon_interval);
1635                 cmd.switch_time = iwl_add_beacon_time(priv,
1636                                                       priv->ucode_beacon_time,
1637                                                       ucode_switch_time,
1638                                                       beacon_interval);
1639         }
1640         IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
1641                       cmd.switch_time);
1642         ch_info = iwl_get_channel_info(priv, priv->band, ch);
1643         if (ch_info)
1644                 cmd.expect_beacon = is_channel_radar(ch_info);
1645         else {
1646                 IWL_ERR(priv, "invalid channel switch from %u to %u\n",
1647                         ctx->active.channel, ch);
1648                 return -EFAULT;
1649         }
1650
1651         rc = iwl4965_fill_txpower_tbl(priv, band, ch, is_ht40,
1652                                       ctrl_chan_high, &cmd.tx_power);
1653         if (rc) {
1654                 IWL_DEBUG_11H(priv, "error:%d  fill txpower_tbl\n", rc);
1655                 return rc;
1656         }
1657
1658         priv->switch_rxon.channel = cmd.channel;
1659         priv->switch_rxon.switch_in_progress = true;
1660
1661         return iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
1662 }
1663
1664 /**
1665  * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
1666  */
1667 static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
1668                                             struct iwl_tx_queue *txq,
1669                                             u16 byte_cnt)
1670 {
1671         struct iwl4965_scd_bc_tbl *scd_bc_tbl = priv->scd_bc_tbls.addr;
1672         int txq_id = txq->q.id;
1673         int write_ptr = txq->q.write_ptr;
1674         int len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
1675         __le16 bc_ent;
1676
1677         WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX);
1678
1679         bc_ent = cpu_to_le16(len & 0xFFF);
1680         /* Set up byte count within first 256 entries */
1681         scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent;
1682
1683         /* If within first 64 entries, duplicate at end */
1684         if (write_ptr < TFD_QUEUE_SIZE_BC_DUP)
1685                 scd_bc_tbl[txq_id].
1686                         tfd_offset[TFD_QUEUE_SIZE_MAX + write_ptr] = bc_ent;
1687 }
1688
1689 /**
1690  * iwl4965_hw_get_temperature - return the calibrated temperature (in Kelvin)
1691  * @statistics: Provides the temperature reading from the uCode
1692  *
1693  * A return of <0 indicates bogus data in the statistics
1694  */
1695 static int iwl4965_hw_get_temperature(struct iwl_priv *priv)
1696 {
1697         s32 temperature;
1698         s32 vt;
1699         s32 R1, R2, R3;
1700         u32 R4;
1701
1702         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
1703             (priv->_agn.statistics.flag &
1704                         STATISTICS_REPLY_FLG_HT40_MODE_MSK)) {
1705                 IWL_DEBUG_TEMP(priv, "Running HT40 temperature calibration\n");
1706                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
1707                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
1708                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
1709                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
1710         } else {
1711                 IWL_DEBUG_TEMP(priv, "Running temperature calibration\n");
1712                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
1713                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
1714                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
1715                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
1716         }
1717
1718         /*
1719          * Temperature is only 23 bits, so sign extend out to 32.
1720          *
1721          * NOTE If we haven't received a statistics notification yet
1722          * with an updated temperature, use R4 provided to us in the
1723          * "initialize" ALIVE response.
1724          */
1725         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
1726                 vt = sign_extend32(R4, 23);
1727         else
1728                 vt = sign_extend32(le32_to_cpu(priv->_agn.statistics.
1729                                  general.common.temperature), 23);
1730
1731         IWL_DEBUG_TEMP(priv, "Calib values R[1-3]: %d %d %d R4: %d\n", R1, R2, R3, vt);
1732
1733         if (R3 == R1) {
1734                 IWL_ERR(priv, "Calibration conflict R1 == R3\n");
1735                 return -1;
1736         }
1737
1738         /* Calculate temperature in degrees Kelvin, adjust by 97%.
1739          * Add offset to center the adjustment around 0 degrees Centigrade. */
1740         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
1741         temperature /= (R3 - R1);
1742         temperature = (temperature * 97) / 100 + TEMPERATURE_CALIB_KELVIN_OFFSET;
1743
1744         IWL_DEBUG_TEMP(priv, "Calibrated temperature: %dK, %dC\n",
1745                         temperature, KELVIN_TO_CELSIUS(temperature));
1746
1747         return temperature;
1748 }
1749
1750 /* Adjust Txpower only if temperature variance is greater than threshold. */
1751 #define IWL_TEMPERATURE_THRESHOLD   3
1752
1753 /**
1754  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
1755  *
1756  * If the temperature changed has changed sufficiently, then a recalibration
1757  * is needed.
1758  *
1759  * Assumes caller will replace priv->last_temperature once calibration
1760  * executed.
1761  */
1762 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
1763 {
1764         int temp_diff;
1765
1766         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
1767                 IWL_DEBUG_TEMP(priv, "Temperature not updated -- no statistics.\n");
1768                 return 0;
1769         }
1770
1771         temp_diff = priv->temperature - priv->last_temperature;
1772
1773         /* get absolute value */
1774         if (temp_diff < 0) {
1775                 IWL_DEBUG_POWER(priv, "Getting cooler, delta %d\n", temp_diff);
1776                 temp_diff = -temp_diff;
1777         } else if (temp_diff == 0)
1778                 IWL_DEBUG_POWER(priv, "Temperature unchanged\n");
1779         else
1780                 IWL_DEBUG_POWER(priv, "Getting warmer, delta %d\n", temp_diff);
1781
1782         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
1783                 IWL_DEBUG_POWER(priv, " => thermal txpower calib not needed\n");
1784                 return 0;
1785         }
1786
1787         IWL_DEBUG_POWER(priv, " => thermal txpower calib needed\n");
1788
1789         return 1;
1790 }
1791
1792 static void iwl4965_temperature_calib(struct iwl_priv *priv)
1793 {
1794         s32 temp;
1795
1796         temp = iwl4965_hw_get_temperature(priv);
1797         if (temp < 0)
1798                 return;
1799
1800         if (priv->temperature != temp) {
1801                 if (priv->temperature)
1802                         IWL_DEBUG_TEMP(priv, "Temperature changed "
1803                                        "from %dC to %dC\n",
1804                                        KELVIN_TO_CELSIUS(priv->temperature),
1805                                        KELVIN_TO_CELSIUS(temp));
1806                 else
1807                         IWL_DEBUG_TEMP(priv, "Temperature "
1808                                        "initialized to %dC\n",
1809                                        KELVIN_TO_CELSIUS(temp));
1810         }
1811
1812         priv->temperature = temp;
1813         iwl_tt_handler(priv);
1814         set_bit(STATUS_TEMPERATURE, &priv->status);
1815
1816         if (!priv->disable_tx_power_cal &&
1817              unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
1818              iwl4965_is_temp_calib_needed(priv))
1819                 queue_work(priv->workqueue, &priv->txpower_work);
1820 }
1821
1822 /**
1823  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
1824  */
1825 static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
1826                                             u16 txq_id)
1827 {
1828         /* Simply stop the queue, but don't change any configuration;
1829          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
1830         iwl_write_prph(priv,
1831                 IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
1832                 (0 << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE)|
1833                 (1 << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
1834 }
1835
1836 /**
1837  * txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE
1838  * priv->lock must be held by the caller
1839  */
1840 static int iwl4965_txq_agg_disable(struct iwl_priv *priv, u16 txq_id,
1841                                    u16 ssn_idx, u8 tx_fifo)
1842 {
1843         if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
1844             (IWL49_FIRST_AMPDU_QUEUE +
1845                 priv->cfg->base_params->num_of_ampdu_queues <= txq_id)) {
1846                 IWL_WARN(priv,
1847                         "queue number out of range: %d, must be %d to %d\n",
1848                         txq_id, IWL49_FIRST_AMPDU_QUEUE,
1849                         IWL49_FIRST_AMPDU_QUEUE +
1850                         priv->cfg->base_params->num_of_ampdu_queues - 1);
1851                 return -EINVAL;
1852         }
1853
1854         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
1855
1856         iwl_clear_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
1857
1858         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
1859         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
1860         /* supposes that ssn_idx is valid (!= 0xFFF) */
1861         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
1862
1863         iwl_clear_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
1864         iwl_txq_ctx_deactivate(priv, txq_id);
1865         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
1866
1867         return 0;
1868 }
1869
1870 /**
1871  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
1872  */
1873 static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
1874                                         u16 txq_id)
1875 {
1876         u32 tbl_dw_addr;
1877         u32 tbl_dw;
1878         u16 scd_q2ratid;
1879
1880         scd_q2ratid = ra_tid & IWL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
1881
1882         tbl_dw_addr = priv->scd_base_addr +
1883                         IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
1884
1885         tbl_dw = iwl_read_targ_mem(priv, tbl_dw_addr);
1886
1887         if (txq_id & 0x1)
1888                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
1889         else
1890                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
1891
1892         iwl_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
1893
1894         return 0;
1895 }
1896
1897
1898 /**
1899  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
1900  *
1901  * NOTE:  txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE,
1902  *        i.e. it must be one of the higher queues used for aggregation
1903  */
1904 static int iwl4965_txq_agg_enable(struct iwl_priv *priv, int txq_id,
1905                                   int tx_fifo, int sta_id, int tid, u16 ssn_idx)
1906 {
1907         unsigned long flags;
1908         u16 ra_tid;
1909         int ret;
1910
1911         if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
1912             (IWL49_FIRST_AMPDU_QUEUE +
1913                 priv->cfg->base_params->num_of_ampdu_queues <= txq_id)) {
1914                 IWL_WARN(priv,
1915                         "queue number out of range: %d, must be %d to %d\n",
1916                         txq_id, IWL49_FIRST_AMPDU_QUEUE,
1917                         IWL49_FIRST_AMPDU_QUEUE +
1918                         priv->cfg->base_params->num_of_ampdu_queues - 1);
1919                 return -EINVAL;
1920         }
1921
1922         ra_tid = BUILD_RAxTID(sta_id, tid);
1923
1924         /* Modify device's station table to Tx this TID */
1925         ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
1926         if (ret)
1927                 return ret;
1928
1929         spin_lock_irqsave(&priv->lock, flags);
1930
1931         /* Stop this Tx queue before configuring it */
1932         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
1933
1934         /* Map receiver-address / traffic-ID to this queue */
1935         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
1936
1937         /* Set this queue as a chain-building queue */
1938         iwl_set_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
1939
1940         /* Place first TFD at index corresponding to start sequence number.
1941          * Assumes that ssn_idx is valid (!= 0xFFF) */
1942         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
1943         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
1944         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
1945
1946         /* Set up Tx window size and frame limit for this queue */
1947         iwl_write_targ_mem(priv,
1948                 priv->scd_base_addr + IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
1949                 (SCD_WIN_SIZE << IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1950                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1951
1952         iwl_write_targ_mem(priv, priv->scd_base_addr +
1953                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
1954                 (SCD_FRAME_LIMIT << IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
1955                 & IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1956
1957         iwl_set_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
1958
1959         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
1960         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
1961
1962         spin_unlock_irqrestore(&priv->lock, flags);
1963
1964         return 0;
1965 }
1966
1967
1968 static u16 iwl4965_get_hcmd_size(u8 cmd_id, u16 len)
1969 {
1970         switch (cmd_id) {
1971         case REPLY_RXON:
1972                 return (u16) sizeof(struct iwl4965_rxon_cmd);
1973         default:
1974                 return len;
1975         }
1976 }
1977
1978 static u16 iwl4965_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
1979 {
1980         struct iwl4965_addsta_cmd *addsta = (struct iwl4965_addsta_cmd *)data;
1981         addsta->mode = cmd->mode;
1982         memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
1983         memcpy(&addsta->key, &cmd->key, sizeof(struct iwl4965_keyinfo));
1984         addsta->station_flags = cmd->station_flags;
1985         addsta->station_flags_msk = cmd->station_flags_msk;
1986         addsta->tid_disable_tx = cmd->tid_disable_tx;
1987         addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
1988         addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
1989         addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
1990         addsta->sleep_tx_count = cmd->sleep_tx_count;
1991         addsta->reserved1 = cpu_to_le16(0);
1992         addsta->reserved2 = cpu_to_le16(0);
1993
1994         return (u16)sizeof(struct iwl4965_addsta_cmd);
1995 }
1996
1997 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
1998 {
1999         return le32_to_cpup(&tx_resp->u.status + tx_resp->frame_count) & MAX_SN;
2000 }
2001
2002 /**
2003  * iwl4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue
2004  */
2005 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2006                                       struct iwl_ht_agg *agg,
2007                                       struct iwl4965_tx_resp *tx_resp,
2008                                       int txq_id, u16 start_idx)
2009 {
2010         u16 status;
2011         struct agg_tx_status *frame_status = tx_resp->u.agg_status;
2012         struct ieee80211_tx_info *info = NULL;
2013         struct ieee80211_hdr *hdr = NULL;
2014         u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2015         int i, sh, idx;
2016         u16 seq;
2017         if (agg->wait_for_ba)
2018                 IWL_DEBUG_TX_REPLY(priv, "got tx response w/o block-ack\n");
2019
2020         agg->frame_count = tx_resp->frame_count;
2021         agg->start_idx = start_idx;
2022         agg->rate_n_flags = rate_n_flags;
2023         agg->bitmap = 0;
2024
2025         /* num frames attempted by Tx command */
2026         if (agg->frame_count == 1) {
2027                 /* Only one frame was attempted; no block-ack will arrive */
2028                 status = le16_to_cpu(frame_status[0].status);
2029                 idx = start_idx;
2030
2031                 /* FIXME: code repetition */
2032                 IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, StartIdx=%d idx=%d\n",
2033                                    agg->frame_count, agg->start_idx, idx);
2034
2035                 info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb);
2036                 info->status.rates[0].count = tx_resp->failure_frame + 1;
2037                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
2038                 info->flags |= iwl_tx_status_to_mac80211(status);
2039                 iwlagn_hwrate_to_tx_control(priv, rate_n_flags, info);
2040                 /* FIXME: code repetition end */
2041
2042                 IWL_DEBUG_TX_REPLY(priv, "1 Frame 0x%x failure :%d\n",
2043                                     status & 0xff, tx_resp->failure_frame);
2044                 IWL_DEBUG_TX_REPLY(priv, "Rate Info rate_n_flags=%x\n", rate_n_flags);
2045
2046                 agg->wait_for_ba = 0;
2047         } else {
2048                 /* Two or more frames were attempted; expect block-ack */
2049                 u64 bitmap = 0;
2050                 int start = agg->start_idx;
2051
2052                 /* Construct bit-map of pending frames within Tx window */
2053                 for (i = 0; i < agg->frame_count; i++) {
2054                         u16 sc;
2055                         status = le16_to_cpu(frame_status[i].status);
2056                         seq  = le16_to_cpu(frame_status[i].sequence);
2057                         idx = SEQ_TO_INDEX(seq);
2058                         txq_id = SEQ_TO_QUEUE(seq);
2059
2060                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2061                                       AGG_TX_STATE_ABORT_MSK))
2062                                 continue;
2063
2064                         IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, txq_id=%d idx=%d\n",
2065                                            agg->frame_count, txq_id, idx);
2066
2067                         hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
2068                         if (!hdr) {
2069                                 IWL_ERR(priv,
2070                                         "BUG_ON idx doesn't point to valid skb"
2071                                         " idx=%d, txq_id=%d\n", idx, txq_id);
2072                                 return -1;
2073                         }
2074
2075                         sc = le16_to_cpu(hdr->seq_ctrl);
2076                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2077                                 IWL_ERR(priv,
2078                                         "BUG_ON idx doesn't match seq control"
2079                                         " idx=%d, seq_idx=%d, seq=%d\n",
2080                                         idx, SEQ_TO_SN(sc), hdr->seq_ctrl);
2081                                 return -1;
2082                         }
2083
2084                         IWL_DEBUG_TX_REPLY(priv, "AGG Frame i=%d idx %d seq=%d\n",
2085                                            i, idx, SEQ_TO_SN(sc));
2086
2087                         sh = idx - start;
2088                         if (sh > 64) {
2089                                 sh = (start - idx) + 0xff;
2090                                 bitmap = bitmap << sh;
2091                                 sh = 0;
2092                                 start = idx;
2093                         } else if (sh < -64)
2094                                 sh  = 0xff - (start - idx);
2095                         else if (sh < 0) {
2096                                 sh = start - idx;
2097                                 start = idx;
2098                                 bitmap = bitmap << sh;
2099                                 sh = 0;
2100                         }
2101                         bitmap |= 1ULL << sh;
2102                         IWL_DEBUG_TX_REPLY(priv, "start=%d bitmap=0x%llx\n",
2103                                            start, (unsigned long long)bitmap);
2104                 }
2105
2106                 agg->bitmap = bitmap;
2107                 agg->start_idx = start;
2108                 IWL_DEBUG_TX_REPLY(priv, "Frames %d start_idx=%d bitmap=0x%llx\n",
2109                                    agg->frame_count, agg->start_idx,
2110                                    (unsigned long long)agg->bitmap);
2111
2112                 if (bitmap)
2113                         agg->wait_for_ba = 1;
2114         }
2115         return 0;
2116 }
2117
2118 static u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
2119 {
2120         int i;
2121         int start = 0;
2122         int ret = IWL_INVALID_STATION;
2123         unsigned long flags;
2124
2125         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
2126             (priv->iw_mode == NL80211_IFTYPE_AP))
2127                 start = IWL_STA_ID;
2128
2129         if (is_broadcast_ether_addr(addr))
2130                 return priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id;
2131
2132         spin_lock_irqsave(&priv->sta_lock, flags);
2133         for (i = start; i < priv->hw_params.max_stations; i++)
2134                 if (priv->stations[i].used &&
2135                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
2136                                          addr))) {
2137                         ret = i;
2138                         goto out;
2139                 }
2140
2141         IWL_DEBUG_ASSOC_LIMIT(priv, "can not find STA %pM total %d\n",
2142                               addr, priv->num_stations);
2143
2144  out:
2145         /*
2146          * It may be possible that more commands interacting with stations
2147          * arrive before we completed processing the adding of
2148          * station
2149          */
2150         if (ret != IWL_INVALID_STATION &&
2151             (!(priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) ||
2152              ((priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) &&
2153               (priv->stations[ret].used & IWL_STA_UCODE_INPROGRESS)))) {
2154                 IWL_ERR(priv, "Requested station info for sta %d before ready.\n",
2155                         ret);
2156                 ret = IWL_INVALID_STATION;
2157         }
2158         spin_unlock_irqrestore(&priv->sta_lock, flags);
2159         return ret;
2160 }
2161
2162 static int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
2163 {
2164         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
2165                 return IWL_AP_ID;
2166         } else {
2167                 u8 *da = ieee80211_get_DA(hdr);
2168                 return iwl_find_station(priv, da);
2169         }
2170 }
2171
2172 /**
2173  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2174  */
2175 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2176                                 struct iwl_rx_mem_buffer *rxb)
2177 {
2178         struct iwl_rx_packet *pkt = rxb_addr(rxb);
2179         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2180         int txq_id = SEQ_TO_QUEUE(sequence);
2181         int index = SEQ_TO_INDEX(sequence);
2182         struct iwl_tx_queue *txq = &priv->txq[txq_id];
2183         struct ieee80211_hdr *hdr;
2184         struct ieee80211_tx_info *info;
2185         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2186         u32  status = le32_to_cpu(tx_resp->u.status);
2187         int uninitialized_var(tid);
2188         int sta_id;
2189         int freed;
2190         u8 *qc = NULL;
2191         unsigned long flags;
2192
2193         if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
2194                 IWL_ERR(priv, "Read index for DMA queue txq_id (%d) index %d "
2195                           "is out of range [0-%d] %d %d\n", txq_id,
2196                           index, txq->q.n_bd, txq->q.write_ptr,
2197                           txq->q.read_ptr);
2198                 return;
2199         }
2200
2201         info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb);
2202         memset(&info->status, 0, sizeof(info->status));
2203
2204         hdr = iwl_tx_queue_get_hdr(priv, txq_id, index);
2205         if (ieee80211_is_data_qos(hdr->frame_control)) {
2206                 qc = ieee80211_get_qos_ctl(hdr);
2207                 tid = qc[0] & 0xf;
2208         }
2209
2210         sta_id = iwl_get_ra_sta_id(priv, hdr);
2211         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2212                 IWL_ERR(priv, "Station not known\n");
2213                 return;
2214         }
2215
2216         spin_lock_irqsave(&priv->sta_lock, flags);
2217         if (txq->sched_retry) {
2218                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2219                 struct iwl_ht_agg *agg = NULL;
2220                 WARN_ON(!qc);
2221
2222                 agg = &priv->stations[sta_id].tid[tid].agg;
2223
2224                 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
2225
2226                 /* check if BAR is needed */
2227                 if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status))
2228                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
2229
2230                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2231                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2232                         IWL_DEBUG_TX_REPLY(priv, "Retry scheduler reclaim scd_ssn "
2233                                            "%d index %d\n", scd_ssn , index);
2234                         freed = iwlagn_tx_queue_reclaim(priv, txq_id, index);
2235                         if (qc)
2236                                 iwl_free_tfds_in_queue(priv, sta_id,
2237                                                        tid, freed);
2238
2239                         if (priv->mac80211_registered &&
2240                             (iwl_queue_space(&txq->q) > txq->q.low_mark) &&
2241                             (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA))
2242                                 iwl_wake_queue(priv, txq);
2243                 }
2244         } else {
2245                 info->status.rates[0].count = tx_resp->failure_frame + 1;
2246                 info->flags |= iwl_tx_status_to_mac80211(status);
2247                 iwlagn_hwrate_to_tx_control(priv,
2248                                         le32_to_cpu(tx_resp->rate_n_flags),
2249                                         info);
2250
2251                 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x) "
2252                                    "rate_n_flags 0x%x retries %d\n",
2253                                    txq_id,
2254                                    iwl_get_tx_fail_reason(status), status,
2255                                    le32_to_cpu(tx_resp->rate_n_flags),
2256                                    tx_resp->failure_frame);
2257
2258                 freed = iwlagn_tx_queue_reclaim(priv, txq_id, index);
2259                 if (qc && likely(sta_id != IWL_INVALID_STATION))
2260                         iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
2261                 else if (sta_id == IWL_INVALID_STATION)
2262                         IWL_DEBUG_TX_REPLY(priv, "Station not known\n");
2263
2264                 if (priv->mac80211_registered &&
2265                     (iwl_queue_space(&txq->q) > txq->q.low_mark))
2266                         iwl_wake_queue(priv, txq);
2267         }
2268         if (qc && likely(sta_id != IWL_INVALID_STATION))
2269                 iwlagn_txq_check_empty(priv, sta_id, tid, txq_id);
2270
2271         iwl_check_abort_status(priv, tx_resp->frame_count, status);
2272
2273         spin_unlock_irqrestore(&priv->sta_lock, flags);
2274 }
2275
2276 static int iwl4965_calc_rssi(struct iwl_priv *priv,
2277                              struct iwl_rx_phy_res *rx_resp)
2278 {
2279         /* data from PHY/DSP regarding signal strength, etc.,
2280          *   contents are always there, not configurable by host.  */
2281         struct iwl4965_rx_non_cfg_phy *ncphy =
2282             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
2283         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL49_AGC_DB_MASK)
2284                         >> IWL49_AGC_DB_POS;
2285
2286         u32 valid_antennae =
2287             (le16_to_cpu(rx_resp->phy_flags) & IWL49_RX_PHY_FLAGS_ANTENNAE_MASK)
2288                         >> IWL49_RX_PHY_FLAGS_ANTENNAE_OFFSET;
2289         u8 max_rssi = 0;
2290         u32 i;
2291
2292         /* Find max rssi among 3 possible receivers.
2293          * These values are measured by the digital signal processor (DSP).
2294          * They should stay fairly constant even as the signal strength varies,
2295          *   if the radio's automatic gain control (AGC) is working right.
2296          * AGC value (see below) will provide the "interesting" info. */
2297         for (i = 0; i < 3; i++)
2298                 if (valid_antennae & (1 << i))
2299                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
2300
2301         IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
2302                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
2303                 max_rssi, agc);
2304
2305         /* dBm = max_rssi dB - agc dB - constant.
2306          * Higher AGC (higher radio gain) means lower signal. */
2307         return max_rssi - agc - IWLAGN_RSSI_OFFSET;
2308 }
2309
2310
2311 /* Set up 4965-specific Rx frame reply handlers */
2312 static void iwl4965_rx_handler_setup(struct iwl_priv *priv)
2313 {
2314         /* Legacy Rx frames */
2315         priv->rx_handlers[REPLY_RX] = iwlagn_rx_reply_rx;
2316         /* Tx response */
2317         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
2318 }
2319
2320 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
2321 {
2322         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
2323 }
2324
2325 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
2326 {
2327         cancel_work_sync(&priv->txpower_work);
2328 }
2329
2330 static struct iwl_hcmd_ops iwl4965_hcmd = {
2331         .rxon_assoc = iwl4965_send_rxon_assoc,
2332         .commit_rxon = iwl4965_commit_rxon,
2333         .set_rxon_chain = iwlagn_set_rxon_chain,
2334         .send_bt_config = iwl_send_bt_config,
2335 };
2336
2337 static void iwl4965_post_scan(struct iwl_priv *priv)
2338 {
2339         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2340
2341         /*
2342          * Since setting the RXON may have been deferred while
2343          * performing the scan, fire one off if needed
2344          */
2345         if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
2346                 iwlcore_commit_rxon(priv, ctx);
2347 }
2348
2349 static void iwl4965_post_associate(struct iwl_priv *priv)
2350 {
2351         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2352         struct ieee80211_vif *vif = ctx->vif;
2353         struct ieee80211_conf *conf = NULL;
2354         int ret = 0;
2355
2356         if (!vif || !priv->is_open)
2357                 return;
2358
2359         if (vif->type == NL80211_IFTYPE_AP) {
2360                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2361                 return;
2362         }
2363
2364         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2365                 return;
2366
2367         iwl_scan_cancel_timeout(priv, 200);
2368
2369         conf = ieee80211_get_hw_conf(priv->hw);
2370
2371         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2372         iwlcore_commit_rxon(priv, ctx);
2373
2374         ret = iwl_send_rxon_timing(priv, ctx);
2375         if (ret)
2376                 IWL_WARN(priv, "RXON timing - "
2377                             "Attempting to continue.\n");
2378
2379         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2380
2381         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2382
2383         if (priv->cfg->ops->hcmd->set_rxon_chain)
2384                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2385
2386         ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
2387
2388         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2389                         vif->bss_conf.aid, vif->bss_conf.beacon_int);
2390
2391         if (vif->bss_conf.use_short_preamble)
2392                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2393         else
2394                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2395
2396         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
2397                 if (vif->bss_conf.use_short_slot)
2398                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2399                 else
2400                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2401         }
2402
2403         iwlcore_commit_rxon(priv, ctx);
2404
2405         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2406                         vif->bss_conf.aid, ctx->active.bssid_addr);
2407
2408         switch (vif->type) {
2409         case NL80211_IFTYPE_STATION:
2410                 break;
2411         case NL80211_IFTYPE_ADHOC:
2412                 iwlagn_send_beacon_cmd(priv);
2413                 break;
2414         default:
2415                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2416                           __func__, vif->type);
2417                 break;
2418         }
2419
2420         /* the chain noise calibration will enabled PM upon completion
2421          * If chain noise has already been run, then we need to enable
2422          * power management here */
2423         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2424                 iwl_power_update_mode(priv, false);
2425
2426         /* Enable Rx differential gain and sensitivity calibrations */
2427         iwl_chain_noise_reset(priv);
2428         priv->start_calib = 1;
2429 }
2430
2431 static void iwl4965_config_ap(struct iwl_priv *priv)
2432 {
2433         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2434         struct ieee80211_vif *vif = ctx->vif;
2435         int ret = 0;
2436
2437         lockdep_assert_held(&priv->mutex);
2438
2439         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2440                 return;
2441
2442         /* The following should be done only at AP bring up */
2443         if (!iwl_is_associated_ctx(ctx)) {
2444
2445                 /* RXON - unassoc (to set timing command) */
2446                 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2447                 iwlcore_commit_rxon(priv, ctx);
2448
2449                 /* RXON Timing */
2450                 ret = iwl_send_rxon_timing(priv, ctx);
2451                 if (ret)
2452                         IWL_WARN(priv, "RXON timing failed - "
2453                                         "Attempting to continue.\n");
2454
2455                 /* AP has all antennas */
2456                 priv->chain_noise_data.active_chains =
2457                         priv->hw_params.valid_rx_ant;
2458                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
2459                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2460                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2461
2462                 ctx->staging.assoc_id = 0;
2463
2464                 if (vif->bss_conf.use_short_preamble)
2465                         ctx->staging.flags |=
2466                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2467                 else
2468                         ctx->staging.flags &=
2469                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2470
2471                 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
2472                         if (vif->bss_conf.use_short_slot)
2473                                 ctx->staging.flags |=
2474                                         RXON_FLG_SHORT_SLOT_MSK;
2475                         else
2476                                 ctx->staging.flags &=
2477                                         ~RXON_FLG_SHORT_SLOT_MSK;
2478                 }
2479                 /* need to send beacon cmd before committing assoc RXON! */
2480                 iwlagn_send_beacon_cmd(priv);
2481                 /* restore RXON assoc */
2482                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2483                 iwlcore_commit_rxon(priv, ctx);
2484         }
2485         iwlagn_send_beacon_cmd(priv);
2486
2487         /* FIXME - we need to add code here to detect a totally new
2488          * configuration, reset the AP, unassoc, rxon timing, assoc,
2489          * clear sta table, add BCAST sta... */
2490 }
2491
2492 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
2493         .get_hcmd_size = iwl4965_get_hcmd_size,
2494         .build_addsta_hcmd = iwl4965_build_addsta_hcmd,
2495         .chain_noise_reset = iwl4965_chain_noise_reset,
2496         .gain_computation = iwl4965_gain_computation,
2497         .tx_cmd_protection = iwl_legacy_tx_cmd_protection,
2498         .calc_rssi = iwl4965_calc_rssi,
2499         .request_scan = iwlagn_request_scan,
2500         .post_scan = iwl4965_post_scan,
2501 };
2502
2503 static struct iwl_lib_ops iwl4965_lib = {
2504         .set_hw_params = iwl4965_hw_set_hw_params,
2505         .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
2506         .txq_set_sched = iwl4965_txq_set_sched,
2507         .txq_agg_enable = iwl4965_txq_agg_enable,
2508         .txq_agg_disable = iwl4965_txq_agg_disable,
2509         .txq_attach_buf_to_tfd = iwl_hw_txq_attach_buf_to_tfd,
2510         .txq_free_tfd = iwl_hw_txq_free_tfd,
2511         .txq_init = iwl_hw_tx_queue_init,
2512         .rx_handler_setup = iwl4965_rx_handler_setup,
2513         .setup_deferred_work = iwl4965_setup_deferred_work,
2514         .cancel_deferred_work = iwl4965_cancel_deferred_work,
2515         .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
2516         .alive_notify = iwl4965_alive_notify,
2517         .init_alive_start = iwl4965_init_alive_start,
2518         .load_ucode = iwl4965_load_bsm,
2519         .dump_nic_event_log = iwl_dump_nic_event_log,
2520         .dump_nic_error_log = iwl_dump_nic_error_log,
2521         .dump_fh = iwl_dump_fh,
2522         .set_channel_switch = iwl4965_hw_channel_switch,
2523         .apm_ops = {
2524                 .init = iwl_apm_init,
2525                 .config = iwl4965_nic_config,
2526         },
2527         .eeprom_ops = {
2528                 .regulatory_bands = {
2529                         EEPROM_REGULATORY_BAND_1_CHANNELS,
2530                         EEPROM_REGULATORY_BAND_2_CHANNELS,
2531                         EEPROM_REGULATORY_BAND_3_CHANNELS,
2532                         EEPROM_REGULATORY_BAND_4_CHANNELS,
2533                         EEPROM_REGULATORY_BAND_5_CHANNELS,
2534                         EEPROM_4965_REGULATORY_BAND_24_HT40_CHANNELS,
2535                         EEPROM_4965_REGULATORY_BAND_52_HT40_CHANNELS
2536                 },
2537                 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
2538                 .release_semaphore = iwlcore_eeprom_release_semaphore,
2539                 .calib_version = iwl4965_eeprom_calib_version,
2540                 .query_addr = iwlcore_eeprom_query_addr,
2541         },
2542         .send_tx_power  = iwl4965_send_tx_power,
2543         .update_chain_flags = iwl_update_chain_flags,
2544         .isr_ops = {
2545                 .isr = iwl_isr_legacy,
2546         },
2547         .temp_ops = {
2548                 .temperature = iwl4965_temperature_calib,
2549         },
2550         .debugfs_ops = {
2551                 .rx_stats_read = iwl_ucode_rx_stats_read,
2552                 .tx_stats_read = iwl_ucode_tx_stats_read,
2553                 .general_stats_read = iwl_ucode_general_stats_read,
2554                 .bt_stats_read = iwl_ucode_bt_stats_read,
2555                 .reply_tx_error = iwl_reply_tx_error_read,
2556         },
2557         .recover_from_tx_stall = iwl_bg_monitor_recover,
2558         .check_plcp_health = iwl_good_plcp_health,
2559 };
2560
2561 static const struct iwl_legacy_ops iwl4965_legacy_ops = {
2562         .post_associate = iwl4965_post_associate,
2563         .config_ap = iwl4965_config_ap,
2564         .manage_ibss_station = iwlagn_manage_ibss_station,
2565         .update_bcast_stations = iwl_update_bcast_stations,
2566 };
2567
2568 struct ieee80211_ops iwl4965_hw_ops = {
2569         .tx = iwlagn_mac_tx,
2570         .start = iwlagn_mac_start,
2571         .stop = iwlagn_mac_stop,
2572         .add_interface = iwl_mac_add_interface,
2573         .remove_interface = iwl_mac_remove_interface,
2574         .change_interface = iwl_mac_change_interface,
2575         .config = iwl_legacy_mac_config,
2576         .configure_filter = iwlagn_configure_filter,
2577         .set_key = iwlagn_mac_set_key,
2578         .update_tkip_key = iwlagn_mac_update_tkip_key,
2579         .conf_tx = iwl_mac_conf_tx,
2580         .reset_tsf = iwl_legacy_mac_reset_tsf,
2581         .bss_info_changed = iwl_legacy_mac_bss_info_changed,
2582         .ampdu_action = iwlagn_mac_ampdu_action,
2583         .hw_scan = iwl_mac_hw_scan,
2584         .sta_add = iwlagn_mac_sta_add,
2585         .sta_remove = iwl_mac_sta_remove,
2586         .channel_switch = iwlagn_mac_channel_switch,
2587         .flush = iwlagn_mac_flush,
2588         .tx_last_beacon = iwl_mac_tx_last_beacon,
2589 };
2590
2591 static const struct iwl_ops iwl4965_ops = {
2592         .lib = &iwl4965_lib,
2593         .hcmd = &iwl4965_hcmd,
2594         .utils = &iwl4965_hcmd_utils,
2595         .led = &iwlagn_led_ops,
2596         .legacy = &iwl4965_legacy_ops,
2597         .ieee80211_ops = &iwl4965_hw_ops,
2598 };
2599
2600 static struct iwl_base_params iwl4965_base_params = {
2601         .eeprom_size = IWL4965_EEPROM_IMG_SIZE,
2602         .num_of_queues = IWL49_NUM_QUEUES,
2603         .num_of_ampdu_queues = IWL49_NUM_AMPDU_QUEUES,
2604         .pll_cfg_val = 0,
2605         .set_l0s = true,
2606         .use_bsm = true,
2607         .use_isr_legacy = true,
2608         .broken_powersave = true,
2609         .led_compensation = 61,
2610         .chain_noise_num_beacons = IWL4965_CAL_NUM_BEACONS,
2611         .plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
2612         .monitor_recover_period = IWL_DEF_MONITORING_PERIOD,
2613         .temperature_kelvin = true,
2614         .max_event_log_size = 512,
2615         .tx_power_by_driver = true,
2616         .ucode_tracing = true,
2617         .sensitivity_calib_by_driver = true,
2618         .chain_noise_calib_by_driver = true,
2619         .no_agg_framecnt_info = true,
2620 };
2621
2622 struct iwl_cfg iwl4965_agn_cfg = {
2623         .name = "Intel(R) Wireless WiFi Link 4965AGN",
2624         .fw_name_pre = IWL4965_FW_PRE,
2625         .ucode_api_max = IWL4965_UCODE_API_MAX,
2626         .ucode_api_min = IWL4965_UCODE_API_MIN,
2627         .valid_tx_ant = ANT_AB,
2628         .valid_rx_ant = ANT_ABC,
2629         .eeprom_ver = EEPROM_4965_EEPROM_VERSION,
2630         .eeprom_calib_ver = EEPROM_4965_TX_POWER_VERSION,
2631         .ops = &iwl4965_ops,
2632         .mod_params = &iwlagn_mod_params,
2633         .base_params = &iwl4965_base_params,
2634         .led_mode = IWL_LED_BLINK,
2635         /*
2636          * Force use of chains B and C for scan RX on 5 GHz band
2637          * because the device has off-channel reception on chain A.
2638          */
2639         .scan_rx_antennas[IEEE80211_BAND_5GHZ] = ANT_BC,
2640 };
2641
2642 /* Module firmware */
2643 MODULE_FIRMWARE(IWL4965_MODULE_FIRMWARE(IWL4965_UCODE_API_MAX));
2644