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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 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-4965-calib.h"
  47 #include "iwl-sta.h"
  48 #include "iwl-4965-led.h"
  49 #include "iwl-4965.h"
  50 #include "iwl-4965-debugfs.h"
  51
  52 static int iwl4965_send_tx_power(struct iwl_priv *priv);
  53 static int iwl4965_hw_get_temperature(struct iwl_priv *priv);
  54
  55 /* Highest firmware API version supported */
  56 #define IWL4965_UCODE_API_MAX 2
  57
  58 /* Lowest firmware API version supported */
  59 #define IWL4965_UCODE_API_MIN 2
  60
  61 #define IWL4965_FW_PRE "iwlwifi-4965-"
  62 #define _IWL4965_MODULE_FIRMWARE(api) IWL4965_FW_PRE #api ".ucode"
  63 #define IWL4965_MODULE_FIRMWARE(api) _IWL4965_MODULE_FIRMWARE(api)
  64
  65 /* check contents of special bootstrap uCode SRAM */
  66 static int iwl4965_verify_bsm(struct iwl_priv *priv)
  67 {
  68         __le32 *image = priv->ucode_boot.v_addr;
  69         u32 len = priv->ucode_boot.len;
  70         u32 reg;
  71         u32 val;
  72
  73         IWL_DEBUG_INFO(priv, "Begin verify bsm\n");
  74
  75         /* verify BSM SRAM contents */
  76         val = iwl_legacy_read_prph(priv, BSM_WR_DWCOUNT_REG);
  77         for (reg = BSM_SRAM_LOWER_BOUND;
  78              reg < BSM_SRAM_LOWER_BOUND + len;
  79              reg += sizeof(u32), image++) {
  80                 val = iwl_legacy_read_prph(priv, reg);
  81                 if (val != le32_to_cpu(*image)) {
  82                         IWL_ERR(priv, "BSM uCode verification failed at "
  83                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
  84                                   BSM_SRAM_LOWER_BOUND,
  85                                   reg - BSM_SRAM_LOWER_BOUND, len,
  86                                   val, le32_to_cpu(*image));
  87                         return -EIO;
  88                 }
  89         }
  90
  91         IWL_DEBUG_INFO(priv, "BSM bootstrap uCode image OK\n");
  92
  93         return 0;
  94 }
  95
  96 /**
  97  * iwl4965_load_bsm - Load bootstrap instructions
  98  *
  99  * BSM operation:
 100  *
 101  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
 102  * in special SRAM that does not power down during RFKILL.  When powering back
 103  * up after power-saving sleeps (or during initial uCode load), the BSM loads
 104  * the bootstrap program into the on-board processor, and starts it.
 105  *
 106  * The bootstrap program loads (via DMA) instructions and data for a new
 107  * program from host DRAM locations indicated by the host driver in the
 108  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
 109  * automatically.
 110  *
 111  * When initializing the NIC, the host driver points the BSM to the
 112  * "initialize" uCode image.  This uCode sets up some internal data, then
 113  * notifies host via "initialize alive" that it is complete.
 114  *
 115  * The host then replaces the BSM_DRAM_* pointer values to point to the
 116  * normal runtime uCode instructions and a backup uCode data cache buffer
 117  * (filled initially with starting data values for the on-board processor),
 118  * then triggers the "initialize" uCode to load and launch the runtime uCode,
 119  * which begins normal operation.
 120  *
 121  * When doing a power-save shutdown, runtime uCode saves data SRAM into
 122  * the backup data cache in DRAM before SRAM is powered down.
 123  *
 124  * When powering back up, the BSM loads the bootstrap program.  This reloads
 125  * the runtime uCode instructions and the backup data cache into SRAM,
 126  * and re-launches the runtime uCode from where it left off.
 127  */
 128 static int iwl4965_load_bsm(struct iwl_priv *priv)
 129 {
 130         __le32 *image = priv->ucode_boot.v_addr;
 131         u32 len = priv->ucode_boot.len;
 132         dma_addr_t pinst;
 133         dma_addr_t pdata;
 134         u32 inst_len;
 135         u32 data_len;
 136         int i;
 137         u32 done;
 138         u32 reg_offset;
 139         int ret;
 140
 141         IWL_DEBUG_INFO(priv, "Begin load bsm\n");
 142
 143         priv->ucode_type = UCODE_RT;
 144
 145         /* make sure bootstrap program is no larger than BSM's SRAM size */
 146         if (len > IWL49_MAX_BSM_SIZE)
 147                 return -EINVAL;
 148
 149         /* Tell bootstrap uCode where to find the "Initialize" uCode
 150          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
 151          * NOTE:  iwl_init_alive_start() will replace these values,
 152          *        after the "initialize" uCode has run, to point to
 153          *        runtime/protocol instructions and backup data cache.
 154          */
 155         pinst = priv->ucode_init.p_addr >> 4;
 156         pdata = priv->ucode_init_data.p_addr >> 4;
 157         inst_len = priv->ucode_init.len;
 158         data_len = priv->ucode_init_data.len;
 159
 160         iwl_legacy_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 161         iwl_legacy_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 162         iwl_legacy_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
 163         iwl_legacy_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
 164
 165         /* Fill BSM memory with bootstrap instructions */
 166         for (reg_offset = BSM_SRAM_LOWER_BOUND;
 167              reg_offset < BSM_SRAM_LOWER_BOUND + len;
 168              reg_offset += sizeof(u32), image++)
 169                 _iwl_legacy_write_prph(priv, reg_offset, le32_to_cpu(*image));
 170
 171         ret = iwl4965_verify_bsm(priv);
 172         if (ret)
 173                 return ret;
 174
 175         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
 176         iwl_legacy_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
 177         iwl_legacy_write_prph(priv,
 178                         BSM_WR_MEM_DST_REG, IWL49_RTC_INST_LOWER_BOUND);
 179         iwl_legacy_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_legacy_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_legacy_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_legacy_write_prph(priv,
 202                         BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
 203
 204
 205         return 0;
 206 }
 207
 208 /**
 209  * iwl4965_set_ucode_ptrs - Set uCode address location
 210  *
 211  * Tell initialization uCode where to find runtime uCode.
 212  *
 213  * BSM registers initially contain pointers to initialization uCode.
 214  * We need to replace them to load runtime uCode inst and data,
 215  * and to save runtime data when powering down.
 216  */
 217 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
 218 {
 219         dma_addr_t pinst;
 220         dma_addr_t pdata;
 221         int ret = 0;
 222
 223         /* bits 35:4 for 4965 */
 224         pinst = priv->ucode_code.p_addr >> 4;
 225         pdata = priv->ucode_data_backup.p_addr >> 4;
 226
 227         /* Tell bootstrap uCode where to find image to load */
 228         iwl_legacy_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 229         iwl_legacy_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 230         iwl_legacy_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
 231                                  priv->ucode_data.len);
 232
 233         /* Inst byte count must be last to set up, bit 31 signals uCode
 234          *   that all new ptr/size info is in place */
 235         iwl_legacy_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
 236                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
 237         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
 238
 239         return ret;
 240 }
 241
 242 /**
 243  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
 244  *
 245  * Called after REPLY_ALIVE notification received from "initialize" uCode.
 246  *
 247  * The 4965 "initialize" ALIVE reply contains calibration data for:
 248  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
 249  *   (3945 does not contain this data).
 250  *
 251  * Tell "initialize" uCode to go ahead and load the runtime uCode.
 252 */
 253 static void iwl4965_init_alive_start(struct iwl_priv *priv)
 254 {
 255         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
 256          * This is a paranoid check, because we would not have gotten the
 257          * "initialize" alive if code weren't properly loaded.  */
 258         if (iwl4965_verify_ucode(priv)) {
 259                 /* Runtime instruction load was bad;
 260                  * take it all the way back down so we can try again */
 261                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
 262                 goto restart;
 263         }
 264
 265         /* Calculate temperature */
 266         priv->temperature = iwl4965_hw_get_temperature(priv);
 267
 268         /* Send pointers to protocol/runtime uCode image ... init code will
 269          * load and launch runtime uCode, which will send us another "Alive"
 270          * notification. */
 271         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 272         if (iwl4965_set_ucode_ptrs(priv)) {
 273                 /* Runtime instruction load won't happen;
 274                  * take it all the way back down so we can try again */
 275                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
 276                 goto restart;
 277         }
 278         return;
 279
 280 restart:
 281         queue_work(priv->workqueue, &priv->restart);
 282 }
 283
 284 static bool iw4965_is_ht40_channel(__le32 rxon_flags)
 285 {
 286         int chan_mod = le32_to_cpu(rxon_flags & RXON_FLG_CHANNEL_MODE_MSK)
 287                                     >> RXON_FLG_CHANNEL_MODE_POS;
 288         return ((chan_mod == CHANNEL_MODE_PURE_40) ||
 289                   (chan_mod == CHANNEL_MODE_MIXED));
 290 }
 291
 292 static void iwl4965_nic_config(struct iwl_priv *priv)
 293 {
 294         unsigned long flags;
 295         u16 radio_cfg;
 296
 297         spin_lock_irqsave(&priv->lock, flags);
 298
 299         radio_cfg = iwl_legacy_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
 300
 301         /* write radio config values to register */
 302         if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) == EEPROM_4965_RF_CFG_TYPE_MAX)
 303                 iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 304                             EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
 305                             EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
 306                             EEPROM_RF_CFG_DASH_MSK(radio_cfg));
 307
 308         /* set CSR_HW_CONFIG_REG for uCode use */
 309         iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 310                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 311                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
 312
 313         priv->calib_info = (struct iwl_eeprom_calib_info *)
 314                 iwl_legacy_eeprom_query_addr(priv,
 315                                 EEPROM_4965_CALIB_TXPOWER_OFFSET);
 316
 317         spin_unlock_irqrestore(&priv->lock, flags);
 318 }
 319
 320 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
 321  * Called after every association, but this runs only once!
 322  *  ... once chain noise is calibrated the first time, it's good forever.  */
 323 static void iwl4965_chain_noise_reset(struct iwl_priv *priv)
 324 {
 325         struct iwl_chain_noise_data *data = &(priv->chain_noise_data);
 326
 327         if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
 328             iwl_legacy_is_any_associated(priv)) {
 329                 struct iwl_calib_diff_gain_cmd cmd;
 330
 331                 /* clear data for chain noise calibration algorithm */
 332                 data->chain_noise_a = 0;
 333                 data->chain_noise_b = 0;
 334                 data->chain_noise_c = 0;
 335                 data->chain_signal_a = 0;
 336                 data->chain_signal_b = 0;
 337                 data->chain_signal_c = 0;
 338                 data->beacon_count = 0;
 339
 340                 memset(&cmd, 0, sizeof(cmd));
 341                 cmd.hdr.op_code = IWL_PHY_CALIBRATE_DIFF_GAIN_CMD;
 342                 cmd.diff_gain_a = 0;
 343                 cmd.diff_gain_b = 0;
 344                 cmd.diff_gain_c = 0;
 345                 if (iwl_legacy_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 346                                  sizeof(cmd), &cmd))
 347                         IWL_ERR(priv,
 348                                 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
 349                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
 350                 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
 351         }
 352 }
 353
 354 static struct iwl_sensitivity_ranges iwl4965_sensitivity = {
 355         .min_nrg_cck = 97,
 356         .max_nrg_cck = 0, /* not used, set to 0 */
 357
 358         .auto_corr_min_ofdm = 85,
 359         .auto_corr_min_ofdm_mrc = 170,
 360         .auto_corr_min_ofdm_x1 = 105,
 361         .auto_corr_min_ofdm_mrc_x1 = 220,
 362
 363         .auto_corr_max_ofdm = 120,
 364         .auto_corr_max_ofdm_mrc = 210,
 365         .auto_corr_max_ofdm_x1 = 140,
 366         .auto_corr_max_ofdm_mrc_x1 = 270,
 367
 368         .auto_corr_min_cck = 125,
 369         .auto_corr_max_cck = 200,
 370         .auto_corr_min_cck_mrc = 200,
 371         .auto_corr_max_cck_mrc = 400,
 372
 373         .nrg_th_cck = 100,
 374         .nrg_th_ofdm = 100,
 375
 376         .barker_corr_th_min = 190,
 377         .barker_corr_th_min_mrc = 390,
 378         .nrg_th_cca = 62,
 379 };
 380
 381 static void iwl4965_set_ct_threshold(struct iwl_priv *priv)
 382 {
 383         /* want Kelvin */
 384         priv->hw_params.ct_kill_threshold =
 385                 CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY);
 386 }
 387
 388 /**
 389  * iwl4965_hw_set_hw_params
 390  *
 391  * Called when initializing driver
 392  */
 393 static int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
 394 {
 395         if (priv->cfg->mod_params->num_of_queues >= IWL_MIN_NUM_QUEUES &&
 396             priv->cfg->mod_params->num_of_queues <= IWL49_NUM_QUEUES)
 397                 priv->cfg->base_params->num_of_queues =
 398                         priv->cfg->mod_params->num_of_queues;
 399
 400         priv->hw_params.max_txq_num = priv->cfg->base_params->num_of_queues;
 401         priv->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM;
 402         priv->hw_params.scd_bc_tbls_size =
 403                         priv->cfg->base_params->num_of_queues *
 404                         sizeof(struct iwl4965_scd_bc_tbl);
 405         priv->hw_params.tfd_size = sizeof(struct iwl_tfd);
 406         priv->hw_params.max_stations = IWL4965_STATION_COUNT;
 407         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWL4965_BROADCAST_ID;
 408         priv->hw_params.max_data_size = IWL49_RTC_DATA_SIZE;
 409         priv->hw_params.max_inst_size = IWL49_RTC_INST_SIZE;
 410         priv->hw_params.max_bsm_size = BSM_SRAM_SIZE;
 411         priv->hw_params.ht40_channel = BIT(IEEE80211_BAND_5GHZ);
 412
 413         priv->hw_params.rx_wrt_ptr_reg = FH_RSCSR_CHNL0_WPTR;
 414
 415         priv->hw_params.tx_chains_num = iwl4965_num_of_ant(priv->cfg->valid_tx_ant);
 416         priv->hw_params.rx_chains_num = iwl4965_num_of_ant(priv->cfg->valid_rx_ant);
 417         priv->hw_params.valid_tx_ant = priv->cfg->valid_tx_ant;
 418         priv->hw_params.valid_rx_ant = priv->cfg->valid_rx_ant;
 419
 420         iwl4965_set_ct_threshold(priv);
 421
 422         priv->hw_params.sens = &iwl4965_sensitivity;
 423         priv->hw_params.beacon_time_tsf_bits = IWL4965_EXT_BEACON_TIME_POS;
 424
 425         return 0;
 426 }
 427
 428 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
 429 {
 430         s32 sign = 1;
 431
 432         if (num < 0) {
 433                 sign = -sign;
 434                 num = -num;
 435         }
 436         if (denom < 0) {
 437                 sign = -sign;
 438                 denom = -denom;
 439         }
 440         *res = 1;
 441         *res = ((num * 2 + denom) / (denom * 2)) * sign;
 442
 443         return 1;
 444 }
 445
 446 /**
 447  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
 448  *
 449  * Determines power supply voltage compensation for txpower calculations.
 450  * Returns number of 1/2-dB steps to subtract from gain table index,
 451  * to compensate for difference between power supply voltage during
 452  * factory measurements, vs. current power supply voltage.
 453  *
 454  * Voltage indication is higher for lower voltage.
 455  * Lower voltage requires more gain (lower gain table index).
 456  */
 457 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
 458                                             s32 current_voltage)
 459 {
 460         s32 comp = 0;
 461
 462         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
 463             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
 464                 return 0;
 465
 466         iwl4965_math_div_round(current_voltage - eeprom_voltage,
 467                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
 468
 469         if (current_voltage > eeprom_voltage)
 470                 comp *= 2;
 471         if ((comp < -2) || (comp > 2))
 472                 comp = 0;
 473
 474         return comp;
 475 }
 476
 477 static s32 iwl4965_get_tx_atten_grp(u16 channel)
 478 {
 479         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
 480             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
 481                 return CALIB_CH_GROUP_5;
 482
 483         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
 484             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
 485                 return CALIB_CH_GROUP_1;
 486
 487         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
 488             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
 489                 return CALIB_CH_GROUP_2;
 490
 491         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
 492             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
 493                 return CALIB_CH_GROUP_3;
 494
 495         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
 496             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
 497                 return CALIB_CH_GROUP_4;
 498
 499         return -EINVAL;
 500 }
 501
 502 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
 503 {
 504         s32 b = -1;
 505
 506         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
 507                 if (priv->calib_info->band_info[b].ch_from == 0)
 508                         continue;
 509
 510                 if ((channel >= priv->calib_info->band_info[b].ch_from)
 511                     && (channel <= priv->calib_info->band_info[b].ch_to))
 512                         break;
 513         }
 514
 515         return b;
 516 }
 517
 518 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
 519 {
 520         s32 val;
 521
 522         if (x2 == x1)
 523                 return y1;
 524         else {
 525                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
 526                 return val + y2;
 527         }
 528 }
 529
 530 /**
 531  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
 532  *
 533  * Interpolates factory measurements from the two sample channels within a
 534  * sub-band, to apply to channel of interest.  Interpolation is proportional to
 535  * differences in channel frequencies, which is proportional to differences
 536  * in channel number.
 537  */
 538 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
 539                                     struct iwl_eeprom_calib_ch_info *chan_info)
 540 {
 541         s32 s = -1;
 542         u32 c;
 543         u32 m;
 544         const struct iwl_eeprom_calib_measure *m1;
 545         const struct iwl_eeprom_calib_measure *m2;
 546         struct iwl_eeprom_calib_measure *omeas;
 547         u32 ch_i1;
 548         u32 ch_i2;
 549
 550         s = iwl4965_get_sub_band(priv, channel);
 551         if (s >= EEPROM_TX_POWER_BANDS) {
 552                 IWL_ERR(priv, "Tx Power can not find channel %d\n", channel);
 553                 return -1;
 554         }
 555
 556         ch_i1 = priv->calib_info->band_info[s].ch1.ch_num;
 557         ch_i2 = priv->calib_info->band_info[s].ch2.ch_num;
 558         chan_info->ch_num = (u8) channel;
 559
 560         IWL_DEBUG_TXPOWER(priv, "channel %d subband %d factory cal ch %d & %d\n",
 561                           channel, s, ch_i1, ch_i2);
 562
 563         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
 564                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
 565                         m1 = &(priv->calib_info->band_info[s].ch1.
 566                                measurements[c][m]);
 567                         m2 = &(priv->calib_info->band_info[s].ch2.
 568                                measurements[c][m]);
 569                         omeas = &(chan_info->measurements[c][m]);
 570
 571                         omeas->actual_pow =
 572                             (u8) iwl4965_interpolate_value(channel, ch_i1,
 573                                                            m1->actual_pow,
 574                                                            ch_i2,
 575                                                            m2->actual_pow);
 576                         omeas->gain_idx =
 577                             (u8) iwl4965_interpolate_value(channel, ch_i1,
 578                                                            m1->gain_idx, ch_i2,
 579                                                            m2->gain_idx);
 580                         omeas->temperature =
 581                             (u8) iwl4965_interpolate_value(channel, ch_i1,
 582                                                            m1->temperature,
 583                                                            ch_i2,
 584                                                            m2->temperature);
 585                         omeas->pa_det =
 586                             (s8) iwl4965_interpolate_value(channel, ch_i1,
 587                                                            m1->pa_det, ch_i2,
 588                                                            m2->pa_det);
 589
 590                         IWL_DEBUG_TXPOWER(priv,
 591                                 "chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
 592                                 m1->actual_pow, m2->actual_pow, omeas->actual_pow);
 593                         IWL_DEBUG_TXPOWER(priv,
 594                                 "chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
 595                                 m1->gain_idx, m2->gain_idx, omeas->gain_idx);
 596                         IWL_DEBUG_TXPOWER(priv,
 597                                 "chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
 598                                 m1->pa_det, m2->pa_det, omeas->pa_det);
 599                         IWL_DEBUG_TXPOWER(priv,
 600                                 "chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
 601                                 m1->temperature, m2->temperature,
 602                                 omeas->temperature);
 603                 }
 604         }
 605
 606         return 0;
 607 }
 608
 609 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
 610  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
 611 static s32 back_off_table[] = {
 612         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
 613         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
 614         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
 615         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
 616         10                      /* CCK */
 617 };
 618
 619 /* Thermal compensation values for txpower for various frequency ranges ...
 620  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
 621 static struct iwl4965_txpower_comp_entry {
 622         s32 degrees_per_05db_a;
 623         s32 degrees_per_05db_a_denom;
 624 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
 625         {9, 2},                 /* group 0 5.2, ch  34-43 */
 626         {4, 1},                 /* group 1 5.2, ch  44-70 */
 627         {4, 1},                 /* group 2 5.2, ch  71-124 */
 628         {4, 1},                 /* group 3 5.2, ch 125-200 */
 629         {3, 1}                  /* group 4 2.4, ch   all */
 630 };
 631
 632 static s32 get_min_power_index(s32 rate_power_index, u32 band)
 633 {
 634         if (!band) {
 635                 if ((rate_power_index & 7) <= 4)
 636                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
 637         }
 638         return MIN_TX_GAIN_INDEX;
 639 }
 640
 641 struct gain_entry {
 642         u8 dsp;
 643         u8 radio;
 644 };
 645
 646 static const struct gain_entry gain_table[2][108] = {
 647         /* 5.2GHz power gain index table */
 648         {
 649          {123, 0x3F},           /* highest txpower */
 650          {117, 0x3F},
 651          {110, 0x3F},
 652          {104, 0x3F},
 653          {98, 0x3F},
 654          {110, 0x3E},
 655          {104, 0x3E},
 656          {98, 0x3E},
 657          {110, 0x3D},
 658          {104, 0x3D},
 659          {98, 0x3D},
 660          {110, 0x3C},
 661          {104, 0x3C},
 662          {98, 0x3C},
 663          {110, 0x3B},
 664          {104, 0x3B},
 665          {98, 0x3B},
 666          {110, 0x3A},
 667          {104, 0x3A},
 668          {98, 0x3A},
 669          {110, 0x39},
 670          {104, 0x39},
 671          {98, 0x39},
 672          {110, 0x38},
 673          {104, 0x38},
 674          {98, 0x38},
 675          {110, 0x37},
 676          {104, 0x37},
 677          {98, 0x37},
 678          {110, 0x36},
 679          {104, 0x36},
 680          {98, 0x36},
 681          {110, 0x35},
 682          {104, 0x35},
 683          {98, 0x35},
 684          {110, 0x34},
 685          {104, 0x34},
 686          {98, 0x34},
 687          {110, 0x33},
 688          {104, 0x33},
 689          {98, 0x33},
 690          {110, 0x32},
 691          {104, 0x32},
 692          {98, 0x32},
 693          {110, 0x31},
 694          {104, 0x31},
 695          {98, 0x31},
 696          {110, 0x30},
 697          {104, 0x30},
 698          {98, 0x30},
 699          {110, 0x25},
 700          {104, 0x25},
 701          {98, 0x25},
 702          {110, 0x24},
 703          {104, 0x24},
 704          {98, 0x24},
 705          {110, 0x23},
 706          {104, 0x23},
 707          {98, 0x23},
 708          {110, 0x22},
 709          {104, 0x18},
 710          {98, 0x18},
 711          {110, 0x17},
 712          {104, 0x17},
 713          {98, 0x17},
 714          {110, 0x16},
 715          {104, 0x16},
 716          {98, 0x16},
 717          {110, 0x15},
 718          {104, 0x15},
 719          {98, 0x15},
 720          {110, 0x14},
 721          {104, 0x14},
 722          {98, 0x14},
 723          {110, 0x13},
 724          {104, 0x13},
 725          {98, 0x13},
 726          {110, 0x12},
 727          {104, 0x08},
 728          {98, 0x08},
 729          {110, 0x07},
 730          {104, 0x07},
 731          {98, 0x07},
 732          {110, 0x06},
 733          {104, 0x06},
 734          {98, 0x06},
 735          {110, 0x05},
 736          {104, 0x05},
 737          {98, 0x05},
 738          {110, 0x04},
 739          {104, 0x04},
 740          {98, 0x04},
 741          {110, 0x03},
 742          {104, 0x03},
 743          {98, 0x03},
 744          {110, 0x02},
 745          {104, 0x02},
 746          {98, 0x02},
 747          {110, 0x01},
 748          {104, 0x01},
 749          {98, 0x01},
 750          {110, 0x00},
 751          {104, 0x00},
 752          {98, 0x00},
 753          {93, 0x00},
 754          {88, 0x00},
 755          {83, 0x00},
 756          {78, 0x00},
 757          },
 758         /* 2.4GHz power gain index table */
 759         {
 760          {110, 0x3f},           /* highest txpower */
 761          {104, 0x3f},
 762          {98, 0x3f},
 763          {110, 0x3e},
 764          {104, 0x3e},
 765          {98, 0x3e},
 766          {110, 0x3d},
 767          {104, 0x3d},
 768          {98, 0x3d},
 769          {110, 0x3c},
 770          {104, 0x3c},
 771          {98, 0x3c},
 772          {110, 0x3b},
 773          {104, 0x3b},
 774          {98, 0x3b},
 775          {110, 0x3a},
 776          {104, 0x3a},
 777          {98, 0x3a},
 778          {110, 0x39},
 779          {104, 0x39},
 780          {98, 0x39},
 781          {110, 0x38},
 782          {104, 0x38},
 783          {98, 0x38},
 784          {110, 0x37},
 785          {104, 0x37},
 786          {98, 0x37},
 787          {110, 0x36},
 788          {104, 0x36},
 789          {98, 0x36},
 790          {110, 0x35},
 791          {104, 0x35},
 792          {98, 0x35},
 793          {110, 0x34},
 794          {104, 0x34},
 795          {98, 0x34},
 796          {110, 0x33},
 797          {104, 0x33},
 798          {98, 0x33},
 799          {110, 0x32},
 800          {104, 0x32},
 801          {98, 0x32},
 802          {110, 0x31},
 803          {104, 0x31},
 804          {98, 0x31},
 805          {110, 0x30},
 806          {104, 0x30},
 807          {98, 0x30},
 808          {110, 0x6},
 809          {104, 0x6},
 810          {98, 0x6},
 811          {110, 0x5},
 812          {104, 0x5},
 813          {98, 0x5},
 814          {110, 0x4},
 815          {104, 0x4},
 816          {98, 0x4},
 817          {110, 0x3},
 818          {104, 0x3},
 819          {98, 0x3},
 820          {110, 0x2},
 821          {104, 0x2},
 822          {98, 0x2},
 823          {110, 0x1},
 824          {104, 0x1},
 825          {98, 0x1},
 826          {110, 0x0},
 827          {104, 0x0},
 828          {98, 0x0},
 829          {97, 0},
 830          {96, 0},
 831          {95, 0},
 832          {94, 0},
 833          {93, 0},
 834          {92, 0},
 835          {91, 0},
 836          {90, 0},
 837          {89, 0},
 838          {88, 0},
 839          {87, 0},
 840          {86, 0},
 841          {85, 0},
 842          {84, 0},
 843          {83, 0},
 844          {82, 0},
 845          {81, 0},
 846          {80, 0},
 847          {79, 0},
 848          {78, 0},
 849          {77, 0},
 850          {76, 0},
 851          {75, 0},
 852          {74, 0},
 853          {73, 0},
 854          {72, 0},
 855          {71, 0},
 856          {70, 0},
 857          {69, 0},
 858          {68, 0},
 859          {67, 0},
 860          {66, 0},
 861          {65, 0},
 862          {64, 0},
 863          {63, 0},
 864          {62, 0},
 865          {61, 0},
 866          {60, 0},
 867          {59, 0},
 868          }
 869 };
 870
 871 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
 872                                     u8 is_ht40, u8 ctrl_chan_high,
 873                                     struct iwl4965_tx_power_db *tx_power_tbl)
 874 {
 875         u8 saturation_power;
 876         s32 target_power;
 877         s32 user_target_power;
 878         s32 power_limit;
 879         s32 current_temp;
 880         s32 reg_limit;
 881         s32 current_regulatory;
 882         s32 txatten_grp = CALIB_CH_GROUP_MAX;
 883         int i;
 884         int c;
 885         const struct iwl_channel_info *ch_info = NULL;
 886         struct iwl_eeprom_calib_ch_info ch_eeprom_info;
 887         const struct iwl_eeprom_calib_measure *measurement;
 888         s16 voltage;
 889         s32 init_voltage;
 890         s32 voltage_compensation;
 891         s32 degrees_per_05db_num;
 892         s32 degrees_per_05db_denom;
 893         s32 factory_temp;
 894         s32 temperature_comp[2];
 895         s32 factory_gain_index[2];
 896         s32 factory_actual_pwr[2];
 897         s32 power_index;
 898
 899         /* tx_power_user_lmt is in dBm, convert to half-dBm (half-dB units
 900          *   are used for indexing into txpower table) */
 901         user_target_power = 2 * priv->tx_power_user_lmt;
 902
 903         /* Get current (RXON) channel, band, width */
 904         IWL_DEBUG_TXPOWER(priv, "chan %d band %d is_ht40 %d\n", channel, band,
 905                           is_ht40);
 906
 907         ch_info = iwl_legacy_get_channel_info(priv, priv->band, channel);
 908
 909         if (!iwl_legacy_is_channel_valid(ch_info))
 910                 return -EINVAL;
 911
 912         /* get txatten group, used to select 1) thermal txpower adjustment
 913          *   and 2) mimo txpower balance between Tx chains. */
 914         txatten_grp = iwl4965_get_tx_atten_grp(channel);
 915         if (txatten_grp < 0) {
 916                 IWL_ERR(priv, "Can't find txatten group for channel %d.\n",
 917                           channel);
 918                 return txatten_grp;
 919         }
 920
 921         IWL_DEBUG_TXPOWER(priv, "channel %d belongs to txatten group %d\n",
 922                           channel, txatten_grp);
 923
 924         if (is_ht40) {
 925                 if (ctrl_chan_high)
 926                         channel -= 2;
 927                 else
 928                         channel += 2;
 929         }
 930
 931         /* hardware txpower limits ...
 932          * saturation (clipping distortion) txpowers are in half-dBm */
 933         if (band)
 934                 saturation_power = priv->calib_info->saturation_power24;
 935         else
 936                 saturation_power = priv->calib_info->saturation_power52;
 937
 938         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
 939             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
 940                 if (band)
 941                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
 942                 else
 943                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
 944         }
 945
 946         /* regulatory txpower limits ... reg_limit values are in half-dBm,
 947          *   max_power_avg values are in dBm, convert * 2 */
 948         if (is_ht40)
 949                 reg_limit = ch_info->ht40_max_power_avg * 2;
 950         else
 951                 reg_limit = ch_info->max_power_avg * 2;
 952
 953         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
 954             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
 955                 if (band)
 956                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
 957                 else
 958                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
 959         }
 960
 961         /* Interpolate txpower calibration values for this channel,
 962          *   based on factory calibration tests on spaced channels. */
 963         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
 964
 965         /* calculate tx gain adjustment based on power supply voltage */
 966         voltage = le16_to_cpu(priv->calib_info->voltage);
 967         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
 968         voltage_compensation =
 969             iwl4965_get_voltage_compensation(voltage, init_voltage);
 970
 971         IWL_DEBUG_TXPOWER(priv, "curr volt %d eeprom volt %d volt comp %d\n",
 972                           init_voltage,
 973                           voltage, voltage_compensation);
 974
 975         /* get current temperature (Celsius) */
 976         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
 977         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
 978         current_temp = KELVIN_TO_CELSIUS(current_temp);
 979
 980         /* select thermal txpower adjustment params, based on channel group
 981          *   (same frequency group used for mimo txatten adjustment) */
 982         degrees_per_05db_num =
 983             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
 984         degrees_per_05db_denom =
 985             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
 986
 987         /* get per-chain txpower values from factory measurements */
 988         for (c = 0; c < 2; c++) {
 989                 measurement = &ch_eeprom_info.measurements[c][1];
 990
 991                 /* txgain adjustment (in half-dB steps) based on difference
 992                  *   between factory and current temperature */
 993                 factory_temp = measurement->temperature;
 994                 iwl4965_math_div_round((current_temp - factory_temp) *
 995                                        degrees_per_05db_denom,
 996                                        degrees_per_05db_num,
 997                                        &temperature_comp[c]);
 998
 999                 factory_gain_index[c] = measurement->gain_idx;
1000                 factory_actual_pwr[c] = measurement->actual_pow;
1001
1002                 IWL_DEBUG_TXPOWER(priv, "chain = %d\n", c);
1003                 IWL_DEBUG_TXPOWER(priv, "fctry tmp %d, "
1004                                   "curr tmp %d, comp %d steps\n",
1005                                   factory_temp, current_temp,
1006                                   temperature_comp[c]);
1007
1008                 IWL_DEBUG_TXPOWER(priv, "fctry idx %d, fctry pwr %d\n",
1009                                   factory_gain_index[c],
1010                                   factory_actual_pwr[c]);
1011         }
1012
1013         /* for each of 33 bit-rates (including 1 for CCK) */
1014         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
1015                 u8 is_mimo_rate;
1016                 union iwl4965_tx_power_dual_stream tx_power;
1017
1018                 /* for mimo, reduce each chain's txpower by half
1019                  * (3dB, 6 steps), so total output power is regulatory
1020                  * compliant. */
1021                 if (i & 0x8) {
1022                         current_regulatory = reg_limit -
1023                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
1024                         is_mimo_rate = 1;
1025                 } else {
1026                         current_regulatory = reg_limit;
1027                         is_mimo_rate = 0;
1028                 }
1029
1030                 /* find txpower limit, either hardware or regulatory */
1031                 power_limit = saturation_power - back_off_table[i];
1032                 if (power_limit > current_regulatory)
1033                         power_limit = current_regulatory;
1034
1035                 /* reduce user's txpower request if necessary
1036                  * for this rate on this channel */
1037                 target_power = user_target_power;
1038                 if (target_power > power_limit)
1039                         target_power = power_limit;
1040
1041                 IWL_DEBUG_TXPOWER(priv, "rate %d sat %d reg %d usr %d tgt %d\n",
1042                                   i, saturation_power - back_off_table[i],
1043                                   current_regulatory, user_target_power,
1044                                   target_power);
1045
1046                 /* for each of 2 Tx chains (radio transmitters) */
1047                 for (c = 0; c < 2; c++) {
1048                         s32 atten_value;
1049
1050                         if (is_mimo_rate)
1051                                 atten_value =
1052                                     (s32)le32_to_cpu(priv->card_alive_init.
1053                                     tx_atten[txatten_grp][c]);
1054                         else
1055                                 atten_value = 0;
1056
1057                         /* calculate index; higher index means lower txpower */
1058                         power_index = (u8) (factory_gain_index[c] -
1059                                             (target_power -
1060                                              factory_actual_pwr[c]) -
1061                                             temperature_comp[c] -
1062                                             voltage_compensation +
1063                                             atten_value);
1064
1065 /*                      IWL_DEBUG_TXPOWER(priv, "calculated txpower index %d\n",
1066                                                 power_index); */
1067
1068                         if (power_index < get_min_power_index(i, band))
1069                                 power_index = get_min_power_index(i, band);
1070
1071                         /* adjust 5 GHz index to support negative indexes */
1072                         if (!band)
1073                                 power_index += 9;
1074
1075                         /* CCK, rate 32, reduce txpower for CCK */
1076                         if (i == POWER_TABLE_CCK_ENTRY)
1077                                 power_index +=
1078                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
1079
1080                         /* stay within the table! */
1081                         if (power_index > 107) {
1082                                 IWL_WARN(priv, "txpower index %d > 107\n",
1083                                             power_index);
1084                                 power_index = 107;
1085                         }
1086                         if (power_index < 0) {
1087                                 IWL_WARN(priv, "txpower index %d < 0\n",
1088                                             power_index);
1089                                 power_index = 0;
1090                         }
1091
1092                         /* fill txpower command for this rate/chain */
1093                         tx_power.s.radio_tx_gain[c] =
1094                                 gain_table[band][power_index].radio;
1095                         tx_power.s.dsp_predis_atten[c] =
1096                                 gain_table[band][power_index].dsp;
1097
1098                         IWL_DEBUG_TXPOWER(priv, "chain %d mimo %d index %d "
1099                                           "gain 0x%02x dsp %d\n",
1100                                           c, atten_value, power_index,
1101                                         tx_power.s.radio_tx_gain[c],
1102                                         tx_power.s.dsp_predis_atten[c]);
1103                 } /* for each chain */
1104
1105                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
1106
1107         } /* for each rate */
1108
1109         return 0;
1110 }
1111
1112 /**
1113  * iwl4965_send_tx_power - Configure the TXPOWER level user limit
1114  *
1115  * Uses the active RXON for channel, band, and characteristics (ht40, high)
1116  * The power limit is taken from priv->tx_power_user_lmt.
1117  */
1118 static int iwl4965_send_tx_power(struct iwl_priv *priv)
1119 {
1120         struct iwl4965_txpowertable_cmd cmd = { 0 };
1121         int ret;
1122         u8 band = 0;
1123         bool is_ht40 = false;
1124         u8 ctrl_chan_high = 0;
1125         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1126
1127         if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
1128                       "TX Power requested while scanning!\n"))
1129                 return -EAGAIN;
1130
1131         band = priv->band == IEEE80211_BAND_2GHZ;
1132
1133         is_ht40 = iw4965_is_ht40_channel(ctx->active.flags);
1134
1135         if (is_ht40 && (ctx->active.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1136                 ctrl_chan_high = 1;
1137
1138         cmd.band = band;
1139         cmd.channel = ctx->active.channel;
1140
1141         ret = iwl4965_fill_txpower_tbl(priv, band,
1142                                 le16_to_cpu(ctx->active.channel),
1143                                 is_ht40, ctrl_chan_high, &cmd.tx_power);
1144         if (ret)
1145                 goto out;
1146
1147         ret = iwl_legacy_send_cmd_pdu(priv,
1148                          REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
1149
1150 out:
1151         return ret;
1152 }
1153
1154 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv,
1155                                    struct iwl_rxon_context *ctx)
1156 {
1157         int ret = 0;
1158         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1159         const struct iwl_legacy_rxon_cmd *rxon1 = &ctx->staging;
1160         const struct iwl_legacy_rxon_cmd *rxon2 = &ctx->active;
1161
1162         if ((rxon1->flags == rxon2->flags) &&
1163             (rxon1->filter_flags == rxon2->filter_flags) &&
1164             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1165             (rxon1->ofdm_ht_single_stream_basic_rates ==
1166              rxon2->ofdm_ht_single_stream_basic_rates) &&
1167             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1168              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1169             (rxon1->rx_chain == rxon2->rx_chain) &&
1170             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1171                 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC.  Not resending.\n");
1172                 return 0;
1173         }
1174
1175         rxon_assoc.flags = ctx->staging.flags;
1176         rxon_assoc.filter_flags = ctx->staging.filter_flags;
1177         rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
1178         rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
1179         rxon_assoc.reserved = 0;
1180         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1181             ctx->staging.ofdm_ht_single_stream_basic_rates;
1182         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1183             ctx->staging.ofdm_ht_dual_stream_basic_rates;
1184         rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
1185
1186         ret = iwl_legacy_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
1187                                      sizeof(rxon_assoc), &rxon_assoc, NULL);
1188
1189         return ret;
1190 }
1191
1192 static int iwl4965_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1193 {
1194         /* cast away the const for active_rxon in this function */
1195         struct iwl_legacy_rxon_cmd *active_rxon = (void *)&ctx->active;
1196         int ret;
1197         bool new_assoc =
1198                 !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
1199
1200         if (!iwl_legacy_is_alive(priv))
1201                 return -EBUSY;
1202
1203         if (!ctx->is_active)
1204                 return 0;
1205
1206         /* always get timestamp with Rx frame */
1207         ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
1208
1209         ret = iwl_legacy_check_rxon_cmd(priv, ctx);
1210         if (ret) {
1211                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
1212                 return -EINVAL;
1213         }
1214
1215         /*
1216          * receive commit_rxon request
1217          * abort any previous channel switch if still in process
1218          */
1219         if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
1220             (priv->switch_channel != ctx->staging.channel)) {
1221                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
1222                       le16_to_cpu(priv->switch_channel));
1223                 iwl_legacy_chswitch_done(priv, false);
1224         }
1225
1226         /* If we don't need to send a full RXON, we can use
1227          * iwl_rxon_assoc_cmd which is used to reconfigure filter
1228          * and other flags for the current radio configuration. */
1229         if (!iwl_legacy_full_rxon_required(priv, ctx)) {
1230                 ret = iwl_legacy_send_rxon_assoc(priv, ctx);
1231                 if (ret) {
1232                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
1233                         return ret;
1234                 }
1235
1236                 memcpy(active_rxon, &ctx->staging, sizeof(*active_rxon));
1237                 iwl_legacy_print_rx_config_cmd(priv, ctx);
1238                 goto set_tx_power;
1239         }
1240
1241         /* If we are currently associated and the new config requires
1242          * an RXON_ASSOC and the new config wants the associated mask enabled,
1243          * we must clear the associated from the active configuration
1244          * before we apply the new config */
1245         if (iwl_legacy_is_associated_ctx(ctx) && new_assoc) {
1246                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
1247                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1248
1249                 ret = iwl_legacy_send_cmd_pdu(priv, ctx->rxon_cmd,
1250                                        sizeof(struct iwl_legacy_rxon_cmd),
1251                                        active_rxon);
1252
1253                 /* If the mask clearing failed then we set
1254                  * active_rxon back to what it was previously */
1255                 if (ret) {
1256                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1257                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
1258                         return ret;
1259                 }
1260                 iwl_legacy_clear_ucode_stations(priv, ctx);
1261                 iwl_legacy_restore_stations(priv, ctx);
1262                 ret = iwl4965_restore_default_wep_keys(priv, ctx);
1263                 if (ret) {
1264                         IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
1265                         return ret;
1266                 }
1267         }
1268
1269         IWL_DEBUG_INFO(priv, "Sending RXON\n"
1270                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1271                        "* channel = %d\n"
1272                        "* bssid = %pM\n",
1273                        (new_assoc ? "" : "out"),
1274                        le16_to_cpu(ctx->staging.channel),
1275                        ctx->staging.bssid_addr);
1276
1277         iwl_legacy_set_rxon_hwcrypto(priv, ctx,
1278                                 !priv->cfg->mod_params->sw_crypto);
1279
1280         /* Apply the new configuration
1281          * RXON unassoc clears the station table in uCode so restoration of
1282          * stations is needed after it (the RXON command) completes
1283          */
1284         if (!new_assoc) {
1285                 ret = iwl_legacy_send_cmd_pdu(priv, ctx->rxon_cmd,
1286                               sizeof(struct iwl_legacy_rxon_cmd), &ctx->staging);
1287                 if (ret) {
1288                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
1289                         return ret;
1290                 }
1291                 IWL_DEBUG_INFO(priv, "Return from !new_assoc RXON.\n");
1292                 memcpy(active_rxon, &ctx->staging, sizeof(*active_rxon));
1293                 iwl_legacy_clear_ucode_stations(priv, ctx);
1294                 iwl_legacy_restore_stations(priv, ctx);
1295                 ret = iwl4965_restore_default_wep_keys(priv, ctx);
1296                 if (ret) {
1297                         IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
1298                         return ret;
1299                 }
1300         }
1301         if (new_assoc) {
1302                 priv->start_calib = 0;
1303                 /* Apply the new configuration
1304                  * RXON assoc doesn't clear the station table in uCode,
1305                  */
1306                 ret = iwl_legacy_send_cmd_pdu(priv, ctx->rxon_cmd,
1307                               sizeof(struct iwl_legacy_rxon_cmd), &ctx->staging);
1308                 if (ret) {
1309                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
1310                         return ret;
1311                 }
1312                 memcpy(active_rxon, &ctx->staging, sizeof(*active_rxon));
1313         }
1314         iwl_legacy_print_rx_config_cmd(priv, ctx);
1315
1316         iwl4965_init_sensitivity(priv);
1317
1318 set_tx_power:
1319         /* If we issue a new RXON command which required a tune then we must
1320          * send a new TXPOWER command or we won't be able to Tx any frames */
1321         ret = iwl_legacy_set_tx_power(priv, priv->tx_power_next, true);
1322         if (ret) {
1323                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
1324                 return ret;
1325         }
1326
1327         return 0;
1328 }
1329
1330 static int iwl4965_hw_channel_switch(struct iwl_priv *priv,
1331                                      struct ieee80211_channel_switch *ch_switch)
1332 {
1333         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1334         int rc;
1335         u8 band = 0;
1336         bool is_ht40 = false;
1337         u8 ctrl_chan_high = 0;
1338         struct iwl4965_channel_switch_cmd cmd;
1339         const struct iwl_channel_info *ch_info;
1340         u32 switch_time_in_usec, ucode_switch_time;
1341         u16 ch;
1342         u32 tsf_low;
1343         u8 switch_count;
1344         u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
1345         struct ieee80211_vif *vif = ctx->vif;
1346         band = priv->band == IEEE80211_BAND_2GHZ;
1347
1348         is_ht40 = iw4965_is_ht40_channel(ctx->staging.flags);
1349
1350         if (is_ht40 &&
1351             (ctx->staging.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1352                 ctrl_chan_high = 1;
1353
1354         cmd.band = band;
1355         cmd.expect_beacon = 0;
1356         ch = ch_switch->channel->hw_value;
1357         cmd.channel = cpu_to_le16(ch);
1358         cmd.rxon_flags = ctx->staging.flags;
1359         cmd.rxon_filter_flags = ctx->staging.filter_flags;
1360         switch_count = ch_switch->count;
1361         tsf_low = ch_switch->timestamp & 0x0ffffffff;
1362         /*
1363          * calculate the ucode channel switch time
1364          * adding TSF as one of the factor for when to switch
1365          */
1366         if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
1367                 if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
1368                     beacon_interval)) {
1369                         switch_count -= (priv->ucode_beacon_time -
1370                                 tsf_low) / beacon_interval;
1371                 } else
1372                         switch_count = 0;
1373         }
1374         if (switch_count <= 1)
1375                 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
1376         else {
1377                 switch_time_in_usec =
1378                         vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
1379                 ucode_switch_time = iwl_legacy_usecs_to_beacons(priv,
1380                                                          switch_time_in_usec,
1381                                                          beacon_interval);
1382                 cmd.switch_time = iwl_legacy_add_beacon_time(priv,
1383                                                       priv->ucode_beacon_time,
1384                                                       ucode_switch_time,
1385                                                       beacon_interval);
1386         }
1387         IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
1388                       cmd.switch_time);
1389         ch_info = iwl_legacy_get_channel_info(priv, priv->band, ch);
1390         if (ch_info)
1391                 cmd.expect_beacon = iwl_legacy_is_channel_radar(ch_info);
1392         else {
1393                 IWL_ERR(priv, "invalid channel switch from %u to %u\n",
1394                         ctx->active.channel, ch);
1395                 return -EFAULT;
1396         }
1397
1398         rc = iwl4965_fill_txpower_tbl(priv, band, ch, is_ht40,
1399                                       ctrl_chan_high, &cmd.tx_power);
1400         if (rc) {
1401                 IWL_DEBUG_11H(priv, "error:%d  fill txpower_tbl\n", rc);
1402                 return rc;
1403         }
1404
1405         return iwl_legacy_send_cmd_pdu(priv,
1406                          REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
1407 }
1408
1409 /**
1410  * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
1411  */
1412 static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
1413                                             struct iwl_tx_queue *txq,
1414                                             u16 byte_cnt)
1415 {
1416         struct iwl4965_scd_bc_tbl *scd_bc_tbl = priv->scd_bc_tbls.addr;
1417         int txq_id = txq->q.id;
1418         int write_ptr = txq->q.write_ptr;
1419         int len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
1420         __le16 bc_ent;
1421
1422         WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX);
1423
1424         bc_ent = cpu_to_le16(len & 0xFFF);
1425         /* Set up byte count within first 256 entries */
1426         scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent;
1427
1428         /* If within first 64 entries, duplicate at end */
1429         if (write_ptr < TFD_QUEUE_SIZE_BC_DUP)
1430                 scd_bc_tbl[txq_id].
1431                         tfd_offset[TFD_QUEUE_SIZE_MAX + write_ptr] = bc_ent;
1432 }
1433
1434 /**
1435  * iwl4965_hw_get_temperature - return the calibrated temperature (in Kelvin)
1436  * @statistics: Provides the temperature reading from the uCode
1437  *
1438  * A return of <0 indicates bogus data in the statistics
1439  */
1440 static int iwl4965_hw_get_temperature(struct iwl_priv *priv)
1441 {
1442         s32 temperature;
1443         s32 vt;
1444         s32 R1, R2, R3;
1445         u32 R4;
1446
1447         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
1448             (priv->_4965.statistics.flag &
1449                         STATISTICS_REPLY_FLG_HT40_MODE_MSK)) {
1450                 IWL_DEBUG_TEMP(priv, "Running HT40 temperature calibration\n");
1451                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
1452                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
1453                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
1454                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
1455         } else {
1456                 IWL_DEBUG_TEMP(priv, "Running temperature calibration\n");
1457                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
1458                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
1459                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
1460                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
1461         }
1462
1463         /*
1464          * Temperature is only 23 bits, so sign extend out to 32.
1465          *
1466          * NOTE If we haven't received a statistics notification yet
1467          * with an updated temperature, use R4 provided to us in the
1468          * "initialize" ALIVE response.
1469          */
1470         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
1471                 vt = sign_extend32(R4, 23);
1472         else
1473                 vt = sign_extend32(le32_to_cpu(priv->_4965.statistics.
1474                                  general.common.temperature), 23);
1475
1476         IWL_DEBUG_TEMP(priv, "Calib values R[1-3]: %d %d %d R4: %d\n", R1, R2, R3, vt);
1477
1478         if (R3 == R1) {
1479                 IWL_ERR(priv, "Calibration conflict R1 == R3\n");
1480                 return -1;
1481         }
1482
1483         /* Calculate temperature in degrees Kelvin, adjust by 97%.
1484          * Add offset to center the adjustment around 0 degrees Centigrade. */
1485         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
1486         temperature /= (R3 - R1);
1487         temperature = (temperature * 97) / 100 + TEMPERATURE_CALIB_KELVIN_OFFSET;
1488
1489         IWL_DEBUG_TEMP(priv, "Calibrated temperature: %dK, %dC\n",
1490                         temperature, KELVIN_TO_CELSIUS(temperature));
1491
1492         return temperature;
1493 }
1494
1495 /* Adjust Txpower only if temperature variance is greater than threshold. */
1496 #define IWL_TEMPERATURE_THRESHOLD   3
1497
1498 /**
1499  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
1500  *
1501  * If the temperature changed has changed sufficiently, then a recalibration
1502  * is needed.
1503  *
1504  * Assumes caller will replace priv->last_temperature once calibration
1505  * executed.
1506  */
1507 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
1508 {
1509         int temp_diff;
1510
1511         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
1512                 IWL_DEBUG_TEMP(priv, "Temperature not updated -- no statistics.\n");
1513                 return 0;
1514         }
1515
1516         temp_diff = priv->temperature - priv->last_temperature;
1517
1518         /* get absolute value */
1519         if (temp_diff < 0) {
1520                 IWL_DEBUG_POWER(priv, "Getting cooler, delta %d\n", temp_diff);
1521                 temp_diff = -temp_diff;
1522         } else if (temp_diff == 0)
1523                 IWL_DEBUG_POWER(priv, "Temperature unchanged\n");
1524         else
1525                 IWL_DEBUG_POWER(priv, "Getting warmer, delta %d\n", temp_diff);
1526
1527         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
1528                 IWL_DEBUG_POWER(priv, " => thermal txpower calib not needed\n");
1529                 return 0;
1530         }
1531
1532         IWL_DEBUG_POWER(priv, " => thermal txpower calib needed\n");
1533
1534         return 1;
1535 }
1536
1537 static void iwl4965_temperature_calib(struct iwl_priv *priv)
1538 {
1539         s32 temp;
1540
1541         temp = iwl4965_hw_get_temperature(priv);
1542         if (IWL_TX_POWER_TEMPERATURE_OUT_OF_RANGE(temp))
1543                 return;
1544
1545         if (priv->temperature != temp) {
1546                 if (priv->temperature)
1547                         IWL_DEBUG_TEMP(priv, "Temperature changed "
1548                                        "from %dC to %dC\n",
1549                                        KELVIN_TO_CELSIUS(priv->temperature),
1550                                        KELVIN_TO_CELSIUS(temp));
1551                 else
1552                         IWL_DEBUG_TEMP(priv, "Temperature "
1553                                        "initialized to %dC\n",
1554                                        KELVIN_TO_CELSIUS(temp));
1555         }
1556
1557         priv->temperature = temp;
1558         set_bit(STATUS_TEMPERATURE, &priv->status);
1559
1560         if (!priv->disable_tx_power_cal &&
1561              unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
1562              iwl4965_is_temp_calib_needed(priv))
1563                 queue_work(priv->workqueue, &priv->txpower_work);
1564 }
1565
1566 static u16 iwl4965_get_hcmd_size(u8 cmd_id, u16 len)
1567 {
1568         switch (cmd_id) {
1569         case REPLY_RXON:
1570                 return (u16) sizeof(struct iwl4965_rxon_cmd);
1571         default:
1572                 return len;
1573         }
1574 }
1575
1576 static u16 iwl4965_build_addsta_hcmd(const struct iwl_legacy_addsta_cmd *cmd,
1577                                                                 u8 *data)
1578 {
1579         struct iwl4965_addsta_cmd *addsta = (struct iwl4965_addsta_cmd *)data;
1580         addsta->mode = cmd->mode;
1581         memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
1582         memcpy(&addsta->key, &cmd->key, sizeof(struct iwl4965_keyinfo));
1583         addsta->station_flags = cmd->station_flags;
1584         addsta->station_flags_msk = cmd->station_flags_msk;
1585         addsta->tid_disable_tx = cmd->tid_disable_tx;
1586         addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
1587         addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
1588         addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
1589         addsta->sleep_tx_count = cmd->sleep_tx_count;
1590         addsta->reserved1 = cpu_to_le16(0);
1591         addsta->reserved2 = cpu_to_le16(0);
1592
1593         return (u16)sizeof(struct iwl4965_addsta_cmd);
1594 }
1595
1596 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
1597 {
1598         return le32_to_cpup(&tx_resp->u.status + tx_resp->frame_count) & MAX_SN;
1599 }
1600
1601 /**
1602  * iwl4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue
1603  */
1604 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
1605                                       struct iwl_ht_agg *agg,
1606                                       struct iwl4965_tx_resp *tx_resp,
1607                                       int txq_id, u16 start_idx)
1608 {
1609         u16 status;
1610         struct agg_tx_status *frame_status = tx_resp->u.agg_status;
1611         struct ieee80211_tx_info *info = NULL;
1612         struct ieee80211_hdr *hdr = NULL;
1613         u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
1614         int i, sh, idx;
1615         u16 seq;
1616         if (agg->wait_for_ba)
1617                 IWL_DEBUG_TX_REPLY(priv, "got tx response w/o block-ack\n");
1618
1619         agg->frame_count = tx_resp->frame_count;
1620         agg->start_idx = start_idx;
1621         agg->rate_n_flags = rate_n_flags;
1622         agg->bitmap = 0;
1623
1624         /* num frames attempted by Tx command */
1625         if (agg->frame_count == 1) {
1626                 /* Only one frame was attempted; no block-ack will arrive */
1627                 status = le16_to_cpu(frame_status[0].status);
1628                 idx = start_idx;
1629
1630                 IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, StartIdx=%d idx=%d\n",
1631                                    agg->frame_count, agg->start_idx, idx);
1632
1633                 info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb);
1634                 info->status.rates[0].count = tx_resp->failure_frame + 1;
1635                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1636                 info->flags |= iwl4965_tx_status_to_mac80211(status);
1637                 iwl4965_hwrate_to_tx_control(priv, rate_n_flags, info);
1638
1639                 IWL_DEBUG_TX_REPLY(priv, "1 Frame 0x%x failure :%d\n",
1640                                     status & 0xff, tx_resp->failure_frame);
1641                 IWL_DEBUG_TX_REPLY(priv, "Rate Info rate_n_flags=%x\n", rate_n_flags);
1642
1643                 agg->wait_for_ba = 0;
1644         } else {
1645                 /* Two or more frames were attempted; expect block-ack */
1646                 u64 bitmap = 0;
1647                 int start = agg->start_idx;
1648
1649                 /* Construct bit-map of pending frames within Tx window */
1650                 for (i = 0; i < agg->frame_count; i++) {
1651                         u16 sc;
1652                         status = le16_to_cpu(frame_status[i].status);
1653                         seq  = le16_to_cpu(frame_status[i].sequence);
1654                         idx = SEQ_TO_INDEX(seq);
1655                         txq_id = SEQ_TO_QUEUE(seq);
1656
1657                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
1658                                       AGG_TX_STATE_ABORT_MSK))
1659                                 continue;
1660
1661                         IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, txq_id=%d idx=%d\n",
1662                                            agg->frame_count, txq_id, idx);
1663
1664                         hdr = iwl_legacy_tx_queue_get_hdr(priv, txq_id, idx);
1665                         if (!hdr) {
1666                                 IWL_ERR(priv,
1667                                         "BUG_ON idx doesn't point to valid skb"
1668                                         " idx=%d, txq_id=%d\n", idx, txq_id);
1669                                 return -1;
1670                         }
1671
1672                         sc = le16_to_cpu(hdr->seq_ctrl);
1673                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
1674                                 IWL_ERR(priv,
1675                                         "BUG_ON idx doesn't match seq control"
1676                                         " idx=%d, seq_idx=%d, seq=%d\n",
1677                                         idx, SEQ_TO_SN(sc), hdr->seq_ctrl);
1678                                 return -1;
1679                         }
1680
1681                         IWL_DEBUG_TX_REPLY(priv, "AGG Frame i=%d idx %d seq=%d\n",
1682                                            i, idx, SEQ_TO_SN(sc));
1683
1684                         sh = idx - start;
1685                         if (sh > 64) {
1686                                 sh = (start - idx) + 0xff;
1687                                 bitmap = bitmap << sh;
1688                                 sh = 0;
1689                                 start = idx;
1690                         } else if (sh < -64)
1691                                 sh  = 0xff - (start - idx);
1692                         else if (sh < 0) {
1693                                 sh = start - idx;
1694                                 start = idx;
1695                                 bitmap = bitmap << sh;
1696                                 sh = 0;
1697                         }
1698                         bitmap |= 1ULL << sh;
1699                         IWL_DEBUG_TX_REPLY(priv, "start=%d bitmap=0x%llx\n",
1700                                            start, (unsigned long long)bitmap);
1701                 }
1702
1703                 agg->bitmap = bitmap;
1704                 agg->start_idx = start;
1705                 IWL_DEBUG_TX_REPLY(priv, "Frames %d start_idx=%d bitmap=0x%llx\n",
1706                                    agg->frame_count, agg->start_idx,
1707                                    (unsigned long long)agg->bitmap);
1708
1709                 if (bitmap)
1710                         agg->wait_for_ba = 1;
1711         }
1712         return 0;
1713 }
1714
1715 static u8 iwl4965_find_station(struct iwl_priv *priv, const u8 *addr)
1716 {
1717         int i;
1718         int start = 0;
1719         int ret = IWL_INVALID_STATION;
1720         unsigned long flags;
1721
1722         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC))
1723                 start = IWL_STA_ID;
1724
1725         if (is_broadcast_ether_addr(addr))
1726                 return priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id;
1727
1728         spin_lock_irqsave(&priv->sta_lock, flags);
1729         for (i = start; i < priv->hw_params.max_stations; i++)
1730                 if (priv->stations[i].used &&
1731                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
1732                                          addr))) {
1733                         ret = i;
1734                         goto out;
1735                 }
1736
1737         IWL_DEBUG_ASSOC_LIMIT(priv, "can not find STA %pM total %d\n",
1738                               addr, priv->num_stations);
1739
1740  out:
1741         /*
1742          * It may be possible that more commands interacting with stations
1743          * arrive before we completed processing the adding of
1744          * station
1745          */
1746         if (ret != IWL_INVALID_STATION &&
1747             (!(priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) ||
1748              ((priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) &&
1749               (priv->stations[ret].used & IWL_STA_UCODE_INPROGRESS)))) {
1750                 IWL_ERR(priv, "Requested station info for sta %d before ready.\n",
1751                         ret);
1752                 ret = IWL_INVALID_STATION;
1753         }
1754         spin_unlock_irqrestore(&priv->sta_lock, flags);
1755         return ret;
1756 }
1757
1758 static int iwl4965_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1759 {
1760         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
1761                 return IWL_AP_ID;
1762         } else {
1763                 u8 *da = ieee80211_get_DA(hdr);
1764                 return iwl4965_find_station(priv, da);
1765         }
1766 }
1767
1768 /**
1769  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
1770  */
1771 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
1772                                 struct iwl_rx_mem_buffer *rxb)
1773 {
1774         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1775         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1776         int txq_id = SEQ_TO_QUEUE(sequence);
1777         int index = SEQ_TO_INDEX(sequence);
1778         struct iwl_tx_queue *txq = &priv->txq[txq_id];
1779         struct ieee80211_hdr *hdr;
1780         struct ieee80211_tx_info *info;
1781         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
1782         u32  status = le32_to_cpu(tx_resp->u.status);
1783         int uninitialized_var(tid);
1784         int sta_id;
1785         int freed;
1786         u8 *qc = NULL;
1787         unsigned long flags;
1788
1789         if ((index >= txq->q.n_bd) || (iwl_legacy_queue_used(&txq->q, index) == 0)) {
1790                 IWL_ERR(priv, "Read index for DMA queue txq_id (%d) index %d "
1791                           "is out of range [0-%d] %d %d\n", txq_id,
1792                           index, txq->q.n_bd, txq->q.write_ptr,
1793                           txq->q.read_ptr);
1794                 return;
1795         }
1796
1797         txq->time_stamp = jiffies;
1798         info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb);
1799         memset(&info->status, 0, sizeof(info->status));
1800
1801         hdr = iwl_legacy_tx_queue_get_hdr(priv, txq_id, index);
1802         if (ieee80211_is_data_qos(hdr->frame_control)) {
1803                 qc = ieee80211_get_qos_ctl(hdr);
1804                 tid = qc[0] & 0xf;
1805         }
1806
1807         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
1808         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
1809                 IWL_ERR(priv, "Station not known\n");
1810                 return;
1811         }
1812
1813         spin_lock_irqsave(&priv->sta_lock, flags);
1814         if (txq->sched_retry) {
1815                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
1816                 struct iwl_ht_agg *agg = NULL;
1817                 WARN_ON(!qc);
1818
1819                 agg = &priv->stations[sta_id].tid[tid].agg;
1820
1821                 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
1822
1823                 /* check if BAR is needed */
1824                 if ((tx_resp->frame_count == 1) && !iwl4965_is_tx_success(status))
1825                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1826
1827                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
1828                         index = iwl_legacy_queue_dec_wrap(scd_ssn & 0xff,
1829                                                                 txq->q.n_bd);
1830                         IWL_DEBUG_TX_REPLY(priv, "Retry scheduler reclaim scd_ssn "
1831                                            "%d index %d\n", scd_ssn , index);
1832                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
1833                         if (qc)
1834                                 iwl4965_free_tfds_in_queue(priv, sta_id,
1835                                                        tid, freed);
1836
1837                         if (priv->mac80211_registered &&
1838                             (iwl_legacy_queue_space(&txq->q) > txq->q.low_mark)
1839                                  && (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA))
1840                                 iwl_legacy_wake_queue(priv, txq);
1841                 }
1842         } else {
1843                 info->status.rates[0].count = tx_resp->failure_frame + 1;
1844                 info->flags |= iwl4965_tx_status_to_mac80211(status);
1845                 iwl4965_hwrate_to_tx_control(priv,
1846                                         le32_to_cpu(tx_resp->rate_n_flags),
1847                                         info);
1848
1849                 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x) "
1850                                    "rate_n_flags 0x%x retries %d\n",
1851                                    txq_id,
1852                                    iwl4965_get_tx_fail_reason(status), status,
1853                                    le32_to_cpu(tx_resp->rate_n_flags),
1854                                    tx_resp->failure_frame);
1855
1856                 freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
1857                 if (qc && likely(sta_id != IWL_INVALID_STATION))
1858                         iwl4965_free_tfds_in_queue(priv, sta_id, tid, freed);
1859                 else if (sta_id == IWL_INVALID_STATION)
1860                         IWL_DEBUG_TX_REPLY(priv, "Station not known\n");
1861
1862                 if (priv->mac80211_registered &&
1863                     (iwl_legacy_queue_space(&txq->q) > txq->q.low_mark))
1864                         iwl_legacy_wake_queue(priv, txq);
1865         }
1866         if (qc && likely(sta_id != IWL_INVALID_STATION))
1867                 iwl4965_txq_check_empty(priv, sta_id, tid, txq_id);
1868
1869         iwl4965_check_abort_status(priv, tx_resp->frame_count, status);
1870
1871         spin_unlock_irqrestore(&priv->sta_lock, flags);
1872 }
1873
1874 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
1875                                     struct iwl_rx_mem_buffer *rxb)
1876 {
1877         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1878         struct iwl4965_beacon_notif *beacon = (void *)pkt->u.raw;
1879         u8 rate __maybe_unused =
1880                 iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
1881
1882         IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
1883                 "tsf:0x%.8x%.8x rate:%d\n",
1884                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
1885                 beacon->beacon_notify_hdr.failure_frame,
1886                 le32_to_cpu(beacon->ibss_mgr_status),
1887                 le32_to_cpu(beacon->high_tsf),
1888                 le32_to_cpu(beacon->low_tsf), rate);
1889
1890         priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
1891 }
1892
1893 /* Set up 4965-specific Rx frame reply handlers */
1894 static void iwl4965_rx_handler_setup(struct iwl_priv *priv)
1895 {
1896         /* Legacy Rx frames */
1897         priv->rx_handlers[REPLY_RX] = iwl4965_rx_reply_rx;
1898         /* Tx response */
1899         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
1900         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
1901 }
1902
1903 static struct iwl_hcmd_ops iwl4965_hcmd = {
1904         .rxon_assoc = iwl4965_send_rxon_assoc,
1905         .commit_rxon = iwl4965_commit_rxon,
1906         .set_rxon_chain = iwl4965_set_rxon_chain,
1907 };
1908
1909 static void iwl4965_post_scan(struct iwl_priv *priv)
1910 {
1911         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1912
1913         /*
1914          * Since setting the RXON may have been deferred while
1915          * performing the scan, fire one off if needed
1916          */
1917         if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1918                 iwl_legacy_commit_rxon(priv, ctx);
1919 }
1920
1921 static void iwl4965_post_associate(struct iwl_priv *priv)
1922 {
1923         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1924         struct ieee80211_vif *vif = ctx->vif;
1925         struct ieee80211_conf *conf = NULL;
1926         int ret = 0;
1927
1928         if (!vif || !priv->is_open)
1929                 return;
1930
1931         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1932                 return;
1933
1934         iwl_legacy_scan_cancel_timeout(priv, 200);
1935
1936         conf = iwl_legacy_ieee80211_get_hw_conf(priv->hw);
1937
1938         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1939         iwl_legacy_commit_rxon(priv, ctx);
1940
1941         ret = iwl_legacy_send_rxon_timing(priv, ctx);
1942         if (ret)
1943                 IWL_WARN(priv, "RXON timing - "
1944                             "Attempting to continue.\n");
1945
1946         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1947
1948         iwl_legacy_set_rxon_ht(priv, &priv->current_ht_config);
1949
1950         if (priv->cfg->ops->hcmd->set_rxon_chain)
1951                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1952
1953         ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
1954
1955         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
1956                         vif->bss_conf.aid, vif->bss_conf.beacon_int);
1957
1958         if (vif->bss_conf.use_short_preamble)
1959                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1960         else
1961                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1962
1963         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
1964                 if (vif->bss_conf.use_short_slot)
1965                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
1966                 else
1967                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1968         }
1969
1970         iwl_legacy_commit_rxon(priv, ctx);
1971
1972         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
1973                         vif->bss_conf.aid, ctx->active.bssid_addr);
1974
1975         switch (vif->type) {
1976         case NL80211_IFTYPE_STATION:
1977                 break;
1978         case NL80211_IFTYPE_ADHOC:
1979                 iwl4965_send_beacon_cmd(priv);
1980                 break;
1981         default:
1982                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
1983                           __func__, vif->type);
1984                 break;
1985         }
1986
1987         /* the chain noise calibration will enabled PM upon completion
1988          * If chain noise has already been run, then we need to enable
1989          * power management here */
1990         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1991                 iwl_legacy_power_update_mode(priv, false);
1992
1993         /* Enable Rx differential gain and sensitivity calibrations */
1994         iwl4965_chain_noise_reset(priv);
1995         priv->start_calib = 1;
1996 }
1997
1998 static void iwl4965_config_ap(struct iwl_priv *priv)
1999 {
2000         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2001         struct ieee80211_vif *vif = ctx->vif;
2002         int ret = 0;
2003
2004         lockdep_assert_held(&priv->mutex);
2005
2006         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2007                 return;
2008
2009         /* The following should be done only at AP bring up */
2010         if (!iwl_legacy_is_associated_ctx(ctx)) {
2011
2012                 /* RXON - unassoc (to set timing command) */
2013                 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2014                 iwl_legacy_commit_rxon(priv, ctx);
2015
2016                 /* RXON Timing */
2017                 ret = iwl_legacy_send_rxon_timing(priv, ctx);
2018                 if (ret)
2019                         IWL_WARN(priv, "RXON timing failed - "
2020                                         "Attempting to continue.\n");
2021
2022                 /* AP has all antennas */
2023                 priv->chain_noise_data.active_chains =
2024                         priv->hw_params.valid_rx_ant;
2025                 iwl_legacy_set_rxon_ht(priv, &priv->current_ht_config);
2026                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2027                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2028
2029                 ctx->staging.assoc_id = 0;
2030
2031                 if (vif->bss_conf.use_short_preamble)
2032                         ctx->staging.flags |=
2033                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2034                 else
2035                         ctx->staging.flags &=
2036                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2037
2038                 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
2039                         if (vif->bss_conf.use_short_slot)
2040                                 ctx->staging.flags |=
2041                                         RXON_FLG_SHORT_SLOT_MSK;
2042                         else
2043                                 ctx->staging.flags &=
2044                                         ~RXON_FLG_SHORT_SLOT_MSK;
2045                 }
2046                 /* need to send beacon cmd before committing assoc RXON! */
2047                 iwl4965_send_beacon_cmd(priv);
2048                 /* restore RXON assoc */
2049                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2050                 iwl_legacy_commit_rxon(priv, ctx);
2051         }
2052         iwl4965_send_beacon_cmd(priv);
2053 }
2054
2055 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
2056         .get_hcmd_size = iwl4965_get_hcmd_size,
2057         .build_addsta_hcmd = iwl4965_build_addsta_hcmd,
2058         .request_scan = iwl4965_request_scan,
2059         .post_scan = iwl4965_post_scan,
2060 };
2061
2062 static struct iwl_lib_ops iwl4965_lib = {
2063         .set_hw_params = iwl4965_hw_set_hw_params,
2064         .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
2065         .txq_attach_buf_to_tfd = iwl4965_hw_txq_attach_buf_to_tfd,
2066         .txq_free_tfd = iwl4965_hw_txq_free_tfd,
2067         .txq_init = iwl4965_hw_tx_queue_init,
2068         .rx_handler_setup = iwl4965_rx_handler_setup,
2069         .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
2070         .init_alive_start = iwl4965_init_alive_start,
2071         .load_ucode = iwl4965_load_bsm,
2072         .dump_nic_error_log = iwl4965_dump_nic_error_log,
2073         .dump_fh = iwl4965_dump_fh,
2074         .set_channel_switch = iwl4965_hw_channel_switch,
2075         .apm_ops = {
2076                 .init = iwl_legacy_apm_init,
2077                 .config = iwl4965_nic_config,
2078         },
2079         .eeprom_ops = {
2080                 .regulatory_bands = {
2081                         EEPROM_REGULATORY_BAND_1_CHANNELS,
2082                         EEPROM_REGULATORY_BAND_2_CHANNELS,
2083                         EEPROM_REGULATORY_BAND_3_CHANNELS,
2084                         EEPROM_REGULATORY_BAND_4_CHANNELS,
2085                         EEPROM_REGULATORY_BAND_5_CHANNELS,
2086                         EEPROM_4965_REGULATORY_BAND_24_HT40_CHANNELS,
2087                         EEPROM_4965_REGULATORY_BAND_52_HT40_CHANNELS
2088                 },
2089                 .acquire_semaphore = iwl4965_eeprom_acquire_semaphore,
2090                 .release_semaphore = iwl4965_eeprom_release_semaphore,
2091         },
2092         .send_tx_power  = iwl4965_send_tx_power,
2093         .update_chain_flags = iwl4965_update_chain_flags,
2094         .temp_ops = {
2095                 .temperature = iwl4965_temperature_calib,
2096         },
2097         .debugfs_ops = {
2098                 .rx_stats_read = iwl4965_ucode_rx_stats_read,
2099                 .tx_stats_read = iwl4965_ucode_tx_stats_read,
2100                 .general_stats_read = iwl4965_ucode_general_stats_read,
2101         },
2102 };
2103
2104 static const struct iwl_legacy_ops iwl4965_legacy_ops = {
2105         .post_associate = iwl4965_post_associate,
2106         .config_ap = iwl4965_config_ap,
2107         .manage_ibss_station = iwl4965_manage_ibss_station,
2108         .update_bcast_stations = iwl4965_update_bcast_stations,
2109 };
2110
2111 struct ieee80211_ops iwl4965_hw_ops = {
2112         .tx = iwl4965_mac_tx,
2113         .start = iwl4965_mac_start,
2114         .stop = iwl4965_mac_stop,
2115         .add_interface = iwl_legacy_mac_add_interface,
2116         .remove_interface = iwl_legacy_mac_remove_interface,
2117         .change_interface = iwl_legacy_mac_change_interface,
2118         .config = iwl_legacy_mac_config,
2119         .configure_filter = iwl4965_configure_filter,
2120         .set_key = iwl4965_mac_set_key,
2121         .update_tkip_key = iwl4965_mac_update_tkip_key,
2122         .conf_tx = iwl_legacy_mac_conf_tx,
2123         .reset_tsf = iwl_legacy_mac_reset_tsf,
2124         .bss_info_changed = iwl_legacy_mac_bss_info_changed,
2125         .ampdu_action = iwl4965_mac_ampdu_action,
2126         .hw_scan = iwl_legacy_mac_hw_scan,
2127         .sta_add = iwl4965_mac_sta_add,
2128         .sta_remove = iwl_legacy_mac_sta_remove,
2129         .channel_switch = iwl4965_mac_channel_switch,
2130         .tx_last_beacon = iwl_legacy_mac_tx_last_beacon,
2131 };
2132
2133 static const struct iwl_ops iwl4965_ops = {
2134         .lib = &iwl4965_lib,
2135         .hcmd = &iwl4965_hcmd,
2136         .utils = &iwl4965_hcmd_utils,
2137         .led = &iwl4965_led_ops,
2138         .legacy = &iwl4965_legacy_ops,
2139         .ieee80211_ops = &iwl4965_hw_ops,
2140 };
2141
2142 static struct iwl_base_params iwl4965_base_params = {
2143         .eeprom_size = IWL4965_EEPROM_IMG_SIZE,
2144         .num_of_queues = IWL49_NUM_QUEUES,
2145         .num_of_ampdu_queues = IWL49_NUM_AMPDU_QUEUES,
2146         .pll_cfg_val = 0,
2147         .set_l0s = true,
2148         .use_bsm = true,
2149         .led_compensation = 61,
2150         .chain_noise_num_beacons = IWL4965_CAL_NUM_BEACONS,
2151         .wd_timeout = IWL_DEF_WD_TIMEOUT,
2152         .temperature_kelvin = true,
2153         .ucode_tracing = true,
2154         .sensitivity_calib_by_driver = true,
2155         .chain_noise_calib_by_driver = true,
2156 };
2157
2158 struct iwl_cfg iwl4965_cfg = {
2159         .name = "Intel(R) Wireless WiFi Link 4965AGN",
2160         .fw_name_pre = IWL4965_FW_PRE,
2161         .ucode_api_max = IWL4965_UCODE_API_MAX,
2162         .ucode_api_min = IWL4965_UCODE_API_MIN,
2163         .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
2164         .valid_tx_ant = ANT_AB,
2165         .valid_rx_ant = ANT_ABC,
2166         .eeprom_ver = EEPROM_4965_EEPROM_VERSION,
2167         .eeprom_calib_ver = EEPROM_4965_TX_POWER_VERSION,
2168         .ops = &iwl4965_ops,
2169         .mod_params = &iwl4965_mod_params,
2170         .base_params = &iwl4965_base_params,
2171         .led_mode = IWL_LED_BLINK,
2172         /*
2173          * Force use of chains B and C for scan RX on 5 GHz band
2174          * because the device has off-channel reception on chain A.
2175          */
2176         .scan_rx_antennas[IEEE80211_BAND_5GHZ] = ANT_BC,
2177 };
2178
2179 /* Module firmware */
2180 MODULE_FIRMWARE(IWL4965_MODULE_FIRMWARE(IWL4965_UCODE_API_MAX));