drivers/net/wireless/ath5k/eeprom.c

   1 /*
   2  * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
   3  * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
   4  * Copyright (c) 2008 Felix Fietkau <nbd@openwrt.org>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  *
  18  */
  19
  20 /*************************************\
  21 * EEPROM access functions and helpers *
  22 \*************************************/
  23
  24 #include "ath5k.h"
  25 #include "reg.h"
  26 #include "debug.h"
  27 #include "base.h"
  28
  29 /*
  30  * Read from eeprom
  31  */
  32 static int ath5k_hw_eeprom_read(struct ath5k_hw *ah, u32 offset, u16 *data)
  33 {
  34         u32 status, timeout;
  35
  36         ATH5K_TRACE(ah->ah_sc);
  37         /*
  38          * Initialize EEPROM access
  39          */
  40         if (ah->ah_version == AR5K_AR5210) {
  41                 AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, AR5K_PCICFG_EEAE);
  42                 (void)ath5k_hw_reg_read(ah, AR5K_EEPROM_BASE + (4 * offset));
  43         } else {
  44                 ath5k_hw_reg_write(ah, offset, AR5K_EEPROM_BASE);
  45                 AR5K_REG_ENABLE_BITS(ah, AR5K_EEPROM_CMD,
  46                                 AR5K_EEPROM_CMD_READ);
  47         }
  48
  49         for (timeout = AR5K_TUNE_REGISTER_TIMEOUT; timeout > 0; timeout--) {
  50                 status = ath5k_hw_reg_read(ah, AR5K_EEPROM_STATUS);
  51                 if (status & AR5K_EEPROM_STAT_RDDONE) {
  52                         if (status & AR5K_EEPROM_STAT_RDERR)
  53                                 return -EIO;
  54                         *data = (u16)(ath5k_hw_reg_read(ah, AR5K_EEPROM_DATA) &
  55                                         0xffff);
  56                         return 0;
  57                 }
  58                 udelay(15);
  59         }
  60
  61         return -ETIMEDOUT;
  62 }
  63
  64 /*
  65  * Translate binary channel representation in EEPROM to frequency
  66  */
  67 static u16 ath5k_eeprom_bin2freq(struct ath5k_eeprom_info *ee, u16 bin,
  68                                  unsigned int mode)
  69 {
  70         u16 val;
  71
  72         if (bin == AR5K_EEPROM_CHANNEL_DIS)
  73                 return bin;
  74
  75         if (mode == AR5K_EEPROM_MODE_11A) {
  76                 if (ee->ee_version > AR5K_EEPROM_VERSION_3_2)
  77                         val = (5 * bin) + 4800;
  78                 else
  79                         val = bin > 62 ? (10 * 62) + (5 * (bin - 62)) + 5100 :
  80                                 (bin * 10) + 5100;
  81         } else {
  82                 if (ee->ee_version > AR5K_EEPROM_VERSION_3_2)
  83                         val = bin + 2300;
  84                 else
  85                         val = bin + 2400;
  86         }
  87
  88         return val;
  89 }
  90
  91 /*
  92  * Initialize eeprom & capabilities structs
  93  */
  94 static int
  95 ath5k_eeprom_init_header(struct ath5k_hw *ah)
  96 {
  97         struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
  98         int ret;
  99         u16 val;
 100
 101         /* Initial TX thermal adjustment values */
 102         ee->ee_tx_clip = 4;
 103         ee->ee_pwd_84 = ee->ee_pwd_90 = 1;
 104         ee->ee_gain_select = 1;
 105
 106         /*
 107          * Read values from EEPROM and store them in the capability structure
 108          */
 109         AR5K_EEPROM_READ_HDR(AR5K_EEPROM_MAGIC, ee_magic);
 110         AR5K_EEPROM_READ_HDR(AR5K_EEPROM_PROTECT, ee_protect);
 111         AR5K_EEPROM_READ_HDR(AR5K_EEPROM_REG_DOMAIN, ee_regdomain);
 112         AR5K_EEPROM_READ_HDR(AR5K_EEPROM_VERSION, ee_version);
 113         AR5K_EEPROM_READ_HDR(AR5K_EEPROM_HDR, ee_header);
 114
 115         /* Return if we have an old EEPROM */
 116         if (ah->ah_ee_version < AR5K_EEPROM_VERSION_3_0)
 117                 return 0;
 118
 119 #ifdef notyet
 120         /*
 121          * Validate the checksum of the EEPROM date. There are some
 122          * devices with invalid EEPROMs.
 123          */
 124         for (cksum = 0, offset = 0; offset < AR5K_EEPROM_INFO_MAX; offset++) {
 125                 AR5K_EEPROM_READ(AR5K_EEPROM_INFO(offset), val);
 126                 cksum ^= val;
 127         }
 128         if (cksum != AR5K_EEPROM_INFO_CKSUM) {
 129                 ATH5K_ERR(ah->ah_sc, "Invalid EEPROM checksum 0x%04x\n", cksum);
 130                 return -EIO;
 131         }
 132 #endif
 133
 134         AR5K_EEPROM_READ_HDR(AR5K_EEPROM_ANT_GAIN(ah->ah_ee_version),
 135             ee_ant_gain);
 136
 137         if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_0) {
 138                 AR5K_EEPROM_READ_HDR(AR5K_EEPROM_MISC0, ee_misc0);
 139                 AR5K_EEPROM_READ_HDR(AR5K_EEPROM_MISC1, ee_misc1);
 140
 141                 /* XXX: Don't know which versions include these two */
 142                 AR5K_EEPROM_READ_HDR(AR5K_EEPROM_MISC2, ee_misc2);
 143
 144                 if (ee->ee_version >= AR5K_EEPROM_VERSION_4_3)
 145                         AR5K_EEPROM_READ_HDR(AR5K_EEPROM_MISC3, ee_misc3);
 146
 147                 if (ee->ee_version >= AR5K_EEPROM_VERSION_5_0) {
 148                         AR5K_EEPROM_READ_HDR(AR5K_EEPROM_MISC4, ee_misc4);
 149                         AR5K_EEPROM_READ_HDR(AR5K_EEPROM_MISC5, ee_misc5);
 150                         AR5K_EEPROM_READ_HDR(AR5K_EEPROM_MISC6, ee_misc6);
 151                 }
 152         }
 153
 154         if (ah->ah_ee_version < AR5K_EEPROM_VERSION_3_3) {
 155                 AR5K_EEPROM_READ(AR5K_EEPROM_OBDB0_2GHZ, val);
 156                 ee->ee_ob[AR5K_EEPROM_MODE_11B][0] = val & 0x7;
 157                 ee->ee_db[AR5K_EEPROM_MODE_11B][0] = (val >> 3) & 0x7;
 158
 159                 AR5K_EEPROM_READ(AR5K_EEPROM_OBDB1_2GHZ, val);
 160                 ee->ee_ob[AR5K_EEPROM_MODE_11G][0] = val & 0x7;
 161                 ee->ee_db[AR5K_EEPROM_MODE_11G][0] = (val >> 3) & 0x7;
 162         }
 163
 164         return 0;
 165 }
 166
 167
 168 /*
 169  * Read antenna infos from eeprom
 170  */
 171 static int ath5k_eeprom_read_ants(struct ath5k_hw *ah, u32 *offset,
 172                 unsigned int mode)
 173 {
 174         struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
 175         u32 o = *offset;
 176         u16 val;
 177         int ret, i = 0;
 178
 179         AR5K_EEPROM_READ(o++, val);
 180         ee->ee_switch_settling[mode]    = (val >> 8) & 0x7f;
 181         ee->ee_atn_tx_rx[mode]          = (val >> 2) & 0x3f;
 182         ee->ee_ant_control[mode][i]     = (val << 4) & 0x3f;
 183
 184         AR5K_EEPROM_READ(o++, val);
 185         ee->ee_ant_control[mode][i++]   |= (val >> 12) & 0xf;
 186         ee->ee_ant_control[mode][i++]   = (val >> 6) & 0x3f;
 187         ee->ee_ant_control[mode][i++]   = val & 0x3f;
 188
 189         AR5K_EEPROM_READ(o++, val);
 190         ee->ee_ant_control[mode][i++]   = (val >> 10) & 0x3f;
 191         ee->ee_ant_control[mode][i++]   = (val >> 4) & 0x3f;
 192         ee->ee_ant_control[mode][i]     = (val << 2) & 0x3f;
 193
 194         AR5K_EEPROM_READ(o++, val);
 195         ee->ee_ant_control[mode][i++]   |= (val >> 14) & 0x3;
 196         ee->ee_ant_control[mode][i++]   = (val >> 8) & 0x3f;
 197         ee->ee_ant_control[mode][i++]   = (val >> 2) & 0x3f;
 198         ee->ee_ant_control[mode][i]     = (val << 4) & 0x3f;
 199
 200         AR5K_EEPROM_READ(o++, val);
 201         ee->ee_ant_control[mode][i++]   |= (val >> 12) & 0xf;
 202         ee->ee_ant_control[mode][i++]   = (val >> 6) & 0x3f;
 203         ee->ee_ant_control[mode][i++]   = val & 0x3f;
 204
 205         /* Get antenna modes */
 206         ah->ah_antenna[mode][0] =
 207             (ee->ee_ant_control[mode][0] << 4) | 0x1;
 208         ah->ah_antenna[mode][AR5K_ANT_FIXED_A] =
 209              ee->ee_ant_control[mode][1]        |
 210             (ee->ee_ant_control[mode][2] << 6)  |
 211             (ee->ee_ant_control[mode][3] << 12) |
 212             (ee->ee_ant_control[mode][4] << 18) |
 213             (ee->ee_ant_control[mode][5] << 24);
 214         ah->ah_antenna[mode][AR5K_ANT_FIXED_B] =
 215              ee->ee_ant_control[mode][6]        |
 216             (ee->ee_ant_control[mode][7] << 6)  |
 217             (ee->ee_ant_control[mode][8] << 12) |
 218             (ee->ee_ant_control[mode][9] << 18) |
 219             (ee->ee_ant_control[mode][10] << 24);
 220
 221         /* return new offset */
 222         *offset = o;
 223
 224         return 0;
 225 }
 226
 227 /*
 228  * Read supported modes and some mode-specific calibration data
 229  * from eeprom
 230  */
 231 static int ath5k_eeprom_read_modes(struct ath5k_hw *ah, u32 *offset,
 232                 unsigned int mode)
 233 {
 234         struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
 235         u32 o = *offset;
 236         u16 val;
 237         int ret;
 238
 239         ee->ee_n_piers[mode] = 0;
 240         AR5K_EEPROM_READ(o++, val);
 241         ee->ee_adc_desired_size[mode]   = (s8)((val >> 8) & 0xff);
 242         switch(mode) {
 243         case AR5K_EEPROM_MODE_11A:
 244                 ee->ee_ob[mode][3]              = (val >> 5) & 0x7;
 245                 ee->ee_db[mode][3]              = (val >> 2) & 0x7;
 246                 ee->ee_ob[mode][2]              = (val << 1) & 0x7;
 247
 248                 AR5K_EEPROM_READ(o++, val);
 249                 ee->ee_ob[mode][2]              |= (val >> 15) & 0x1;
 250                 ee->ee_db[mode][2]              = (val >> 12) & 0x7;
 251                 ee->ee_ob[mode][1]              = (val >> 9) & 0x7;
 252                 ee->ee_db[mode][1]              = (val >> 6) & 0x7;
 253                 ee->ee_ob[mode][0]              = (val >> 3) & 0x7;
 254                 ee->ee_db[mode][0]              = val & 0x7;
 255                 break;
 256         case AR5K_EEPROM_MODE_11G:
 257         case AR5K_EEPROM_MODE_11B:
 258                 ee->ee_ob[mode][1]              = (val >> 4) & 0x7;
 259                 ee->ee_db[mode][1]              = val & 0x7;
 260                 break;
 261         }
 262
 263         AR5K_EEPROM_READ(o++, val);
 264         ee->ee_tx_end2xlna_enable[mode] = (val >> 8) & 0xff;
 265         ee->ee_thr_62[mode]             = val & 0xff;
 266
 267         if (ah->ah_ee_version <= AR5K_EEPROM_VERSION_3_2)
 268                 ee->ee_thr_62[mode] = mode == AR5K_EEPROM_MODE_11A ? 15 : 28;
 269
 270         AR5K_EEPROM_READ(o++, val);
 271         ee->ee_tx_end2xpa_disable[mode] = (val >> 8) & 0xff;
 272         ee->ee_tx_frm2xpa_enable[mode]  = val & 0xff;
 273
 274         AR5K_EEPROM_READ(o++, val);
 275         ee->ee_pga_desired_size[mode]   = (val >> 8) & 0xff;
 276
 277         if ((val & 0xff) & 0x80)
 278                 ee->ee_noise_floor_thr[mode] = -((((val & 0xff) ^ 0xff)) + 1);
 279         else
 280                 ee->ee_noise_floor_thr[mode] = val & 0xff;
 281
 282         if (ah->ah_ee_version <= AR5K_EEPROM_VERSION_3_2)
 283                 ee->ee_noise_floor_thr[mode] =
 284                     mode == AR5K_EEPROM_MODE_11A ? -54 : -1;
 285
 286         AR5K_EEPROM_READ(o++, val);
 287         ee->ee_xlna_gain[mode]          = (val >> 5) & 0xff;
 288         ee->ee_x_gain[mode]             = (val >> 1) & 0xf;
 289         ee->ee_xpd[mode]                = val & 0x1;
 290
 291         if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_0)
 292                 ee->ee_fixed_bias[mode] = (val >> 13) & 0x1;
 293
 294         if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_3_3) {
 295                 AR5K_EEPROM_READ(o++, val);
 296                 ee->ee_false_detect[mode] = (val >> 6) & 0x7f;
 297
 298                 if (mode == AR5K_EEPROM_MODE_11A)
 299                         ee->ee_xr_power[mode] = val & 0x3f;
 300                 else {
 301                         ee->ee_ob[mode][0] = val & 0x7;
 302                         ee->ee_db[mode][0] = (val >> 3) & 0x7;
 303                 }
 304         }
 305
 306         if (ah->ah_ee_version < AR5K_EEPROM_VERSION_3_4) {
 307                 ee->ee_i_gain[mode] = AR5K_EEPROM_I_GAIN;
 308                 ee->ee_cck_ofdm_power_delta = AR5K_EEPROM_CCK_OFDM_DELTA;
 309         } else {
 310                 ee->ee_i_gain[mode] = (val >> 13) & 0x7;
 311
 312                 AR5K_EEPROM_READ(o++, val);
 313                 ee->ee_i_gain[mode] |= (val << 3) & 0x38;
 314
 315                 if (mode == AR5K_EEPROM_MODE_11G) {
 316                         ee->ee_cck_ofdm_power_delta = (val >> 3) & 0xff;
 317                         if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_6)
 318                                 ee->ee_scaled_cck_delta = (val >> 11) & 0x1f;
 319                 }
 320         }
 321
 322         if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_0 &&
 323                         mode == AR5K_EEPROM_MODE_11A) {
 324                 ee->ee_i_cal[mode] = (val >> 8) & 0x3f;
 325                 ee->ee_q_cal[mode] = (val >> 3) & 0x1f;
 326         }
 327
 328         if (ah->ah_ee_version < AR5K_EEPROM_VERSION_4_0)
 329                 goto done;
 330
 331         /* Note: >= v5 have bg freq piers on another location
 332          * so these freq piers are ignored for >= v5 (should be 0xff
 333          * anyway) */
 334         switch(mode) {
 335         case AR5K_EEPROM_MODE_11A:
 336                 if (ah->ah_ee_version < AR5K_EEPROM_VERSION_4_1)
 337                         break;
 338
 339                 AR5K_EEPROM_READ(o++, val);
 340                 ee->ee_margin_tx_rx[mode] = val & 0x3f;
 341                 break;
 342         case AR5K_EEPROM_MODE_11B:
 343                 AR5K_EEPROM_READ(o++, val);
 344
 345                 ee->ee_pwr_cal_b[0].freq =
 346                         ath5k_eeprom_bin2freq(ee, val & 0xff, mode);
 347                 if (ee->ee_pwr_cal_b[0].freq != AR5K_EEPROM_CHANNEL_DIS)
 348                         ee->ee_n_piers[mode]++;
 349
 350                 ee->ee_pwr_cal_b[1].freq =
 351                         ath5k_eeprom_bin2freq(ee, (val >> 8) & 0xff, mode);
 352                 if (ee->ee_pwr_cal_b[1].freq != AR5K_EEPROM_CHANNEL_DIS)
 353                         ee->ee_n_piers[mode]++;
 354
 355                 AR5K_EEPROM_READ(o++, val);
 356                 ee->ee_pwr_cal_b[2].freq =
 357                         ath5k_eeprom_bin2freq(ee, val & 0xff, mode);
 358                 if (ee->ee_pwr_cal_b[2].freq != AR5K_EEPROM_CHANNEL_DIS)
 359                         ee->ee_n_piers[mode]++;
 360
 361                 if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_1)
 362                         ee->ee_margin_tx_rx[mode] = (val >> 8) & 0x3f;
 363                 break;
 364         case AR5K_EEPROM_MODE_11G:
 365                 AR5K_EEPROM_READ(o++, val);
 366
 367                 ee->ee_pwr_cal_g[0].freq =
 368                         ath5k_eeprom_bin2freq(ee, val & 0xff, mode);
 369                 if (ee->ee_pwr_cal_g[0].freq != AR5K_EEPROM_CHANNEL_DIS)
 370                         ee->ee_n_piers[mode]++;
 371
 372                 ee->ee_pwr_cal_g[1].freq =
 373                         ath5k_eeprom_bin2freq(ee, (val >> 8) & 0xff, mode);
 374                 if (ee->ee_pwr_cal_g[1].freq != AR5K_EEPROM_CHANNEL_DIS)
 375                         ee->ee_n_piers[mode]++;
 376
 377                 AR5K_EEPROM_READ(o++, val);
 378                 ee->ee_turbo_max_power[mode] = val & 0x7f;
 379                 ee->ee_xr_power[mode] = (val >> 7) & 0x3f;
 380
 381                 AR5K_EEPROM_READ(o++, val);
 382                 ee->ee_pwr_cal_g[2].freq =
 383                         ath5k_eeprom_bin2freq(ee, val & 0xff, mode);
 384                 if (ee->ee_pwr_cal_g[2].freq != AR5K_EEPROM_CHANNEL_DIS)
 385                         ee->ee_n_piers[mode]++;
 386
 387                 if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_1)
 388                         ee->ee_margin_tx_rx[mode] = (val >> 8) & 0x3f;
 389
 390                 AR5K_EEPROM_READ(o++, val);
 391                 ee->ee_i_cal[mode] = (val >> 8) & 0x3f;
 392                 ee->ee_q_cal[mode] = (val >> 3) & 0x1f;
 393
 394                 if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_2) {
 395                         AR5K_EEPROM_READ(o++, val);
 396                         ee->ee_cck_ofdm_gain_delta = val & 0xff;
 397                 }
 398                 break;
 399         }
 400
 401 done:
 402         /* return new offset */
 403         *offset = o;
 404
 405         return 0;
 406 }
 407
 408 /*
 409  * Read turbo mode information on newer EEPROM versions
 410  */
 411 static int
 412 ath5k_eeprom_read_turbo_modes(struct ath5k_hw *ah,
 413                               u32 *offset, unsigned int mode)
 414 {
 415         struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
 416         u32 o = *offset;
 417         u16 val;
 418         int ret;
 419
 420         if (ee->ee_version < AR5K_EEPROM_VERSION_5_0)
 421                 return 0;
 422
 423         switch (mode){
 424         case AR5K_EEPROM_MODE_11A:
 425                 ee->ee_switch_settling_turbo[mode] = (val >> 6) & 0x7f;
 426
 427                 ee->ee_atn_tx_rx_turbo[mode] = (val >> 13) & 0x7;
 428                 AR5K_EEPROM_READ(o++, val);
 429                 ee->ee_atn_tx_rx_turbo[mode] |= (val & 0x7) << 3;
 430                 ee->ee_margin_tx_rx_turbo[mode] = (val >> 3) & 0x3f;
 431
 432                 ee->ee_adc_desired_size_turbo[mode] = (val >> 9) & 0x7f;
 433                 AR5K_EEPROM_READ(o++, val);
 434                 ee->ee_adc_desired_size_turbo[mode] |= (val & 0x1) << 7;
 435                 ee->ee_pga_desired_size_turbo[mode] = (val >> 1) & 0xff;
 436
 437                 if (AR5K_EEPROM_EEMAP(ee->ee_misc0) >=2)
 438                         ee->ee_pd_gain_overlap = (val >> 9) & 0xf;
 439                 break;
 440         case AR5K_EEPROM_MODE_11G:
 441                 ee->ee_switch_settling_turbo[mode] = (val >> 8) & 0x7f;
 442
 443                 ee->ee_atn_tx_rx_turbo[mode] = (val >> 15) & 0x7;
 444                 AR5K_EEPROM_READ(o++, val);
 445                 ee->ee_atn_tx_rx_turbo[mode] |= (val & 0x1f) << 1;
 446                 ee->ee_margin_tx_rx_turbo[mode] = (val >> 5) & 0x3f;
 447
 448                 ee->ee_adc_desired_size_turbo[mode] = (val >> 11) & 0x7f;
 449                 AR5K_EEPROM_READ(o++, val);
 450                 ee->ee_adc_desired_size_turbo[mode] |= (val & 0x7) << 5;
 451                 ee->ee_pga_desired_size_turbo[mode] = (val >> 3) & 0xff;
 452                 break;
 453         }
 454
 455         /* return new offset */
 456         *offset = o;
 457
 458         return 0;
 459 }
 460
 461 /* Read mode-specific data (except power calibration data) */
 462 static int
 463 ath5k_eeprom_init_modes(struct ath5k_hw *ah)
 464 {
 465         struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
 466         u32 mode_offset[3];
 467         unsigned int mode;
 468         u32 offset;
 469         int ret;
 470
 471         /*
 472          * Get values for all modes
 473          */
 474         mode_offset[AR5K_EEPROM_MODE_11A] = AR5K_EEPROM_MODES_11A(ah->ah_ee_version);
 475         mode_offset[AR5K_EEPROM_MODE_11B] = AR5K_EEPROM_MODES_11B(ah->ah_ee_version);
 476         mode_offset[AR5K_EEPROM_MODE_11G] = AR5K_EEPROM_MODES_11G(ah->ah_ee_version);
 477
 478         ee->ee_turbo_max_power[AR5K_EEPROM_MODE_11A] =
 479                 AR5K_EEPROM_HDR_T_5GHZ_DBM(ee->ee_header);
 480
 481         for (mode = AR5K_EEPROM_MODE_11A; mode <= AR5K_EEPROM_MODE_11G; mode++) {
 482                 offset = mode_offset[mode];
 483
 484                 ret = ath5k_eeprom_read_ants(ah, &offset, mode);
 485                 if (ret)
 486                         return ret;
 487
 488                 ret = ath5k_eeprom_read_modes(ah, &offset, mode);
 489                 if (ret)
 490                         return ret;
 491
 492                 ret = ath5k_eeprom_read_turbo_modes(ah, &offset, mode);
 493                 if (ret)
 494                         return ret;
 495         }
 496
 497         /* override for older eeprom versions for better performance */
 498         if (ah->ah_ee_version <= AR5K_EEPROM_VERSION_3_2) {
 499                 ee->ee_thr_62[AR5K_EEPROM_MODE_11A] = 15;
 500                 ee->ee_thr_62[AR5K_EEPROM_MODE_11B] = 28;
 501                 ee->ee_thr_62[AR5K_EEPROM_MODE_11G] = 28;
 502         }
 503
 504         return 0;
 505 }
 506
 507 /* Used to match PCDAC steps with power values on RF5111 chips
 508  * (eeprom versions < 4). For RF5111 we have 10 pre-defined PCDAC
 509  * steps that match with the power values we read from eeprom. On
 510  * older eeprom versions (< 3.2) these steps are equaly spaced at
 511  * 10% of the pcdac curve -until the curve reaches it's maximum-
 512  * (10 steps from 0 to 100%) but on newer eeprom versions (>= 3.2)
 513  * these 10 steps are spaced in a different way. This function returns
 514  * the pcdac steps based on eeprom version and curve min/max so that we
 515  * can have  pcdac/pwr points.
 516  */
 517 static inline void
 518 ath5k_get_pcdac_intercepts(struct ath5k_hw *ah, u8 min, u8 max, u8 *vp)
 519 {
 520         const static u16 intercepts3[] =
 521                 { 0, 5, 10, 20, 30, 50, 70, 85, 90, 95, 100 };
 522         const static u16 intercepts3_2[] =
 523                 { 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 };
 524         const u16 *ip;
 525         int i;
 526
 527         if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_3_2)
 528                 ip = intercepts3_2;
 529         else
 530                 ip = intercepts3;
 531
 532         for (i = 0; i < ARRAY_SIZE(intercepts3); i++)
 533                 *vp++ = (ip[i] * max + (100 - ip[i]) * min) / 100;
 534 }
 535
 536 /* Read the frequency piers for each mode (mostly used on newer eeproms with 0xff
 537  * frequency mask) */
 538 static inline int
 539 ath5k_eeprom_read_freq_list(struct ath5k_hw *ah, int *offset, int max,
 540                         struct ath5k_chan_pcal_info *pc, unsigned int mode)
 541 {
 542         struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
 543         int o = *offset;
 544         int i = 0;
 545         u8 freq1, freq2;
 546         int ret;
 547         u16 val;
 548
 549         while(i < max) {
 550                 AR5K_EEPROM_READ(o++, val);
 551
 552                 freq1 = (val >> 8) & 0xff;
 553                 freq2 = val & 0xff;
 554
 555                 if (freq1) {
 556                         pc[i++].freq = ath5k_eeprom_bin2freq(ee,
 557                                         freq1, mode);
 558                         ee->ee_n_piers[mode]++;
 559                 }
 560
 561                 if (freq2) {
 562                         pc[i++].freq = ath5k_eeprom_bin2freq(ee,
 563                                         freq2, mode);
 564                         ee->ee_n_piers[mode]++;
 565                 }
 566
 567                 if (!freq1 || !freq2)
 568                         break;
 569         }
 570
 571         /* return new offset */
 572         *offset = o;
 573
 574         return 0;
 575 }
 576
 577 /* Read frequency piers for 802.11a */
 578 static int
 579 ath5k_eeprom_init_11a_pcal_freq(struct ath5k_hw *ah, int offset)
 580 {
 581         struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
 582         struct ath5k_chan_pcal_info *pcal = ee->ee_pwr_cal_a;
 583         int i, ret;
 584         u16 val;
 585         u8 mask;
 586
 587         if (ee->ee_version >= AR5K_EEPROM_VERSION_3_3) {
 588                 ath5k_eeprom_read_freq_list(ah, &offset,
 589                         AR5K_EEPROM_N_5GHZ_CHAN, pcal,
 590                         AR5K_EEPROM_MODE_11A);
 591         } else {
 592                 mask = AR5K_EEPROM_FREQ_M(ah->ah_ee_version);
 593
 594                 AR5K_EEPROM_READ(offset++, val);
 595                 pcal[0].freq  = (val >> 9) & mask;
 596                 pcal[1].freq  = (val >> 2) & mask;
 597                 pcal[2].freq  = (val << 5) & mask;
 598
 599                 AR5K_EEPROM_READ(offset++, val);
 600                 pcal[2].freq |= (val >> 11) & 0x1f;
 601                 pcal[3].freq  = (val >> 4) & mask;
 602                 pcal[4].freq  = (val << 3) & mask;
 603
 604                 AR5K_EEPROM_READ(offset++, val);
 605                 pcal[4].freq |= (val >> 13) & 0x7;
 606                 pcal[5].freq  = (val >> 6) & mask;
 607                 pcal[6].freq  = (val << 1) & mask;
 608
 609                 AR5K_EEPROM_READ(offset++, val);
 610                 pcal[6].freq |= (val >> 15) & 0x1;
 611                 pcal[7].freq  = (val >> 8) & mask;
 612                 pcal[8].freq  = (val >> 1) & mask;
 613                 pcal[9].freq  = (val << 6) & mask;
 614
 615                 AR5K_EEPROM_READ(offset++, val);
 616                 pcal[9].freq |= (val >> 10) & 0x3f;
 617
 618                 /* Fixed number of piers */
 619                 ee->ee_n_piers[AR5K_EEPROM_MODE_11A] = 10;
 620
 621                 for (i = 0; i < AR5K_EEPROM_N_5GHZ_CHAN; i++) {
 622                         pcal[i].freq = ath5k_eeprom_bin2freq(ee,
 623                                 pcal[i].freq, AR5K_EEPROM_MODE_11A);
 624                 }
 625         }
 626
 627         return 0;
 628 }
 629
 630 /* Read frequency piers for 802.11bg on eeprom versions >= 5 and eemap >= 2 */
 631 static inline int
 632 ath5k_eeprom_init_11bg_2413(struct ath5k_hw *ah, unsigned int mode, int offset)
 633 {
 634         struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
 635         struct ath5k_chan_pcal_info *pcal;
 636
 637         switch(mode) {
 638         case AR5K_EEPROM_MODE_11B:
 639                 pcal = ee->ee_pwr_cal_b;
 640                 break;
 641         case AR5K_EEPROM_MODE_11G:
 642                 pcal = ee->ee_pwr_cal_g;
 643                 break;
 644         default:
 645                 return -EINVAL;
 646         }
 647
 648         ath5k_eeprom_read_freq_list(ah, &offset,
 649                 AR5K_EEPROM_N_2GHZ_CHAN_2413, pcal,
 650                 mode);
 651
 652         return 0;
 653 }
 654
 655 /* Read power calibration for RF5111 chips
 656  * For RF5111 we have an XPD -eXternal Power Detector- curve
 657  * for each calibrated channel. Each curve has PCDAC steps on
 658  * x axis and power on y axis and looks like a logarithmic
 659  * function. To recreate the curve and pass the power values
 660  * on the pcdac table, we read 10 points here and interpolate later.
 661  */
 662 static int
 663 ath5k_eeprom_read_pcal_info_5111(struct ath5k_hw *ah, int mode)
 664 {
 665         struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
 666         struct ath5k_chan_pcal_info *pcal;
 667         int offset, ret;
 668         int i, j;
 669         u16 val;
 670
 671         offset = AR5K_EEPROM_GROUPS_START(ee->ee_version);
 672         switch(mode) {
 673         case AR5K_EEPROM_MODE_11A:
 674                 if (!AR5K_EEPROM_HDR_11A(ee->ee_header))
 675                         return 0;
 676
 677                 ret = ath5k_eeprom_init_11a_pcal_freq(ah,
 678                         offset + AR5K_EEPROM_GROUP1_OFFSET);
 679                 if (ret < 0)
 680                         return ret;
 681
 682                 offset += AR5K_EEPROM_GROUP2_OFFSET;
 683                 pcal = ee->ee_pwr_cal_a;
 684                 break;
 685         case AR5K_EEPROM_MODE_11B:
 686                 if (!AR5K_EEPROM_HDR_11B(ee->ee_header) &&
 687                     !AR5K_EEPROM_HDR_11G(ee->ee_header))
 688                         return 0;
 689
 690                 pcal = ee->ee_pwr_cal_b;
 691                 offset += AR5K_EEPROM_GROUP3_OFFSET;
 692
 693                 /* fixed piers */
 694                 pcal[0].freq = 2412;
 695                 pcal[1].freq = 2447;
 696                 pcal[2].freq = 2484;
 697                 ee->ee_n_piers[mode] = 3;
 698                 break;
 699         case AR5K_EEPROM_MODE_11G:
 700                 if (!AR5K_EEPROM_HDR_11G(ee->ee_header))
 701                         return 0;
 702
 703                 pcal = ee->ee_pwr_cal_g;
 704                 offset += AR5K_EEPROM_GROUP4_OFFSET;
 705
 706                 /* fixed piers */
 707                 pcal[0].freq = 2312;
 708                 pcal[1].freq = 2412;
 709                 pcal[2].freq = 2484;
 710                 ee->ee_n_piers[mode] = 3;
 711                 break;
 712         default:
 713                 return -EINVAL;
 714         }
 715
 716         for (i = 0; i < ee->ee_n_piers[mode]; i++) {
 717                 struct ath5k_chan_pcal_info_rf5111 *cdata =
 718                         &pcal[i].rf5111_info;
 719
 720                 AR5K_EEPROM_READ(offset++, val);
 721                 cdata->pcdac_max = ((val >> 10) & AR5K_EEPROM_PCDAC_M);
 722                 cdata->pcdac_min = ((val >> 4) & AR5K_EEPROM_PCDAC_M);
 723                 cdata->pwr[0] = ((val << 2) & AR5K_EEPROM_POWER_M);
 724
 725                 AR5K_EEPROM_READ(offset++, val);
 726                 cdata->pwr[0] |= ((val >> 14) & 0x3);
 727                 cdata->pwr[1] = ((val >> 8) & AR5K_EEPROM_POWER_M);
 728                 cdata->pwr[2] = ((val >> 2) & AR5K_EEPROM_POWER_M);
 729                 cdata->pwr[3] = ((val << 4) & AR5K_EEPROM_POWER_M);
 730
 731                 AR5K_EEPROM_READ(offset++, val);
 732                 cdata->pwr[3] |= ((val >> 12) & 0xf);
 733                 cdata->pwr[4] = ((val >> 6) & AR5K_EEPROM_POWER_M);
 734                 cdata->pwr[5] = (val  & AR5K_EEPROM_POWER_M);
 735
 736                 AR5K_EEPROM_READ(offset++, val);
 737                 cdata->pwr[6] = ((val >> 10) & AR5K_EEPROM_POWER_M);
 738                 cdata->pwr[7] = ((val >> 4) & AR5K_EEPROM_POWER_M);
 739                 cdata->pwr[8] = ((val << 2) & AR5K_EEPROM_POWER_M);
 740
 741                 AR5K_EEPROM_READ(offset++, val);
 742                 cdata->pwr[8] |= ((val >> 14) & 0x3);
 743                 cdata->pwr[9] = ((val >> 8) & AR5K_EEPROM_POWER_M);
 744                 cdata->pwr[10] = ((val >> 2) & AR5K_EEPROM_POWER_M);
 745
 746                 ath5k_get_pcdac_intercepts(ah, cdata->pcdac_min,
 747                         cdata->pcdac_max, cdata->pcdac);
 748
 749                 for (j = 0; j < AR5K_EEPROM_N_PCDAC; j++) {
 750                         cdata->pwr[j] = (u16)
 751                                 (AR5K_EEPROM_POWER_STEP * cdata->pwr[j]);
 752                 }
 753         }
 754
 755         return 0;
 756 }
 757
 758 /* Read power calibration for RF5112 chips
 759  * For RF5112 we have 4 XPD -eXternal Power Detector- curves
 760  * for each calibrated channel on 0, -6, -12 and -18dbm but we only
 761  * use the higher (3) and the lower (0) curves. Each curve has PCDAC
 762  * steps on x axis and power on y axis and looks like a linear
 763  * function. To recreate the curve and pass the power values
 764  * on the pcdac table, we read 4 points for xpd 0 and 3 points
 765  * for xpd 3 here and interpolate later.
 766  *
 767  * Note: Many vendors just use xpd 0 so xpd 3 is zeroed.
 768  */
 769 static int
 770 ath5k_eeprom_read_pcal_info_5112(struct ath5k_hw *ah, int mode)
 771 {
 772         struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
 773         struct ath5k_chan_pcal_info_rf5112 *chan_pcal_info;
 774         struct ath5k_chan_pcal_info *gen_chan_info;
 775         u32 offset;
 776         unsigned int i, c;
 777         u16 val;
 778         int ret;
 779
 780         switch (mode) {
 781         case AR5K_EEPROM_MODE_11A:
 782                 /*
 783                  * Read 5GHz EEPROM channels
 784                  */
 785                 offset = AR5K_EEPROM_GROUPS_START(ee->ee_version);
 786                 ath5k_eeprom_init_11a_pcal_freq(ah, offset);
 787
 788                 offset += AR5K_EEPROM_GROUP2_OFFSET;
 789                 gen_chan_info = ee->ee_pwr_cal_a;
 790                 break;
 791         case AR5K_EEPROM_MODE_11B:
 792                 offset = AR5K_EEPROM_GROUPS_START(ee->ee_version);
 793                 if (AR5K_EEPROM_HDR_11A(ee->ee_header))
 794                         offset += AR5K_EEPROM_GROUP3_OFFSET;
 795
 796                 /* NB: frequency piers parsed during mode init */
 797                 gen_chan_info = ee->ee_pwr_cal_b;
 798                 break;
 799         case AR5K_EEPROM_MODE_11G:
 800                 offset = AR5K_EEPROM_GROUPS_START(ee->ee_version);
 801                 if (AR5K_EEPROM_HDR_11A(ee->ee_header))
 802                         offset += AR5K_EEPROM_GROUP4_OFFSET;
 803                 else if (AR5K_EEPROM_HDR_11B(ee->ee_header))
 804                         offset += AR5K_EEPROM_GROUP2_OFFSET;
 805
 806                 /* NB: frequency piers parsed during mode init */
 807                 gen_chan_info = ee->ee_pwr_cal_g;
 808                 break;
 809         default:
 810                 return -EINVAL;
 811         }
 812
 813         for (i = 0; i < ee->ee_n_piers[mode]; i++) {
 814                 chan_pcal_info = &gen_chan_info[i].rf5112_info;
 815
 816                 /* Power values in dBm * 4
 817                  * for the lower xpd gain curve
 818                  * (0 dBm -> higher output power) */
 819                 for (c = 0; c < AR5K_EEPROM_N_XPD0_POINTS; c++) {
 820                         AR5K_EEPROM_READ(offset++, val);
 821                         chan_pcal_info->pwr_x0[c] = (val & 0xff);
 822                         chan_pcal_info->pwr_x0[++c] = ((val >> 8) & 0xff);
 823                 }
 824
 825                 /* PCDAC steps
 826                  * corresponding to the above power
 827                  * measurements */
 828                 AR5K_EEPROM_READ(offset++, val);
 829                 chan_pcal_info->pcdac_x0[1] = (val & 0x1f);
 830                 chan_pcal_info->pcdac_x0[2] = ((val >> 5) & 0x1f);
 831                 chan_pcal_info->pcdac_x0[3] = ((val >> 10) & 0x1f);
 832
 833                 /* Power values in dBm * 4
 834                  * for the higher xpd gain curve
 835                  * (18 dBm -> lower output power) */
 836                 AR5K_EEPROM_READ(offset++, val);
 837                 chan_pcal_info->pwr_x3[0] = (val & 0xff);
 838                 chan_pcal_info->pwr_x3[1] = ((val >> 8) & 0xff);
 839
 840                 AR5K_EEPROM_READ(offset++, val);
 841                 chan_pcal_info->pwr_x3[2] = (val & 0xff);
 842
 843                 /* PCDAC steps
 844                  * corresponding to the above power
 845                  * measurements (fixed) */
 846                 chan_pcal_info->pcdac_x3[0] = 20;
 847                 chan_pcal_info->pcdac_x3[1] = 35;
 848                 chan_pcal_info->pcdac_x3[2] = 63;
 849
 850                 if (ee->ee_version >= AR5K_EEPROM_VERSION_4_3) {
 851                         chan_pcal_info->pcdac_x0[0] = ((val >> 8) & 0xff);
 852
 853                         /* Last xpd0 power level is also channel maximum */
 854                         gen_chan_info[i].max_pwr = chan_pcal_info->pwr_x0[3];
 855                 } else {
 856                         chan_pcal_info->pcdac_x0[0] = 1;
 857                         gen_chan_info[i].max_pwr = ((val >> 8) & 0xff);
 858                 }
 859
 860                 /* Recreate pcdac_x0 table for this channel using pcdac steps */
 861                 chan_pcal_info->pcdac_x0[1] += chan_pcal_info->pcdac_x0[0];
 862                 chan_pcal_info->pcdac_x0[2] += chan_pcal_info->pcdac_x0[1];
 863                 chan_pcal_info->pcdac_x0[3] += chan_pcal_info->pcdac_x0[2];
 864         }
 865
 866         return 0;
 867 }
 868
 869 /* For RF2413 power calibration data doesn't start on a fixed location and
 870  * if a mode is not supported, it's section is missing -not zeroed-.
 871  * So we need to calculate the starting offset for each section by using
 872  * these two functions */
 873
 874 /* Return the size of each section based on the mode and the number of pd
 875  * gains available (maximum 4). */
 876 static inline unsigned int
 877 ath5k_pdgains_size_2413(struct ath5k_eeprom_info *ee, unsigned int mode)
 878 {
 879         static const unsigned int pdgains_size[] = { 4, 6, 9, 12 };
 880         unsigned int sz;
 881
 882         sz = pdgains_size[ee->ee_pd_gains[mode] - 1];
 883         sz *= ee->ee_n_piers[mode];
 884
 885         return sz;
 886 }
 887
 888 /* Return the starting offset for a section based on the modes supported
 889  * and each section's size. */
 890 static unsigned int
 891 ath5k_cal_data_offset_2413(struct ath5k_eeprom_info *ee, int mode)
 892 {
 893         u32 offset = AR5K_EEPROM_CAL_DATA_START(ee->ee_misc4);
 894
 895         switch(mode) {
 896         case AR5K_EEPROM_MODE_11G:
 897                 if (AR5K_EEPROM_HDR_11B(ee->ee_header))
 898                         offset += ath5k_pdgains_size_2413(ee, AR5K_EEPROM_MODE_11B) +
 899                                                         AR5K_EEPROM_N_2GHZ_CHAN_2413 / 2;
 900                 /* fall through */
 901         case AR5K_EEPROM_MODE_11B:
 902                 if (AR5K_EEPROM_HDR_11A(ee->ee_header))
 903                         offset += ath5k_pdgains_size_2413(ee, AR5K_EEPROM_MODE_11A) +
 904                                                         AR5K_EEPROM_N_5GHZ_CHAN / 2;
 905                 /* fall through */
 906         case AR5K_EEPROM_MODE_11A:
 907                 break;
 908         default:
 909                 break;
 910         }
 911
 912         return offset;
 913 }
 914
 915 /* Read power calibration for RF2413 chips
 916  * For RF2413 we have a PDDAC table (Power Detector) instead
 917  * of a PCDAC and 4 pd gain curves for each calibrated channel.
 918  * Each curve has PDDAC steps on x axis and power on y axis and
 919  * looks like an exponential function. To recreate the curves
 920  * we read here the points and interpolate later. Note that
 921  * in most cases only higher and lower curves are used (like
 922  * RF5112) but vendors have the oportunity to include all 4
 923  * curves on eeprom. The final curve (higher power) has an extra
 924  * point for better accuracy like RF5112.
 925  */
 926 static int
 927 ath5k_eeprom_read_pcal_info_2413(struct ath5k_hw *ah, int mode)
 928 {
 929         struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
 930         struct ath5k_chan_pcal_info_rf2413 *chan_pcal_info;
 931         struct ath5k_chan_pcal_info *gen_chan_info;
 932         unsigned int i, c;
 933         u32 offset;
 934         int ret;
 935         u16 val;
 936         u8 pd_gains = 0;
 937
 938         if (ee->ee_x_gain[mode] & 0x1) pd_gains++;
 939         if ((ee->ee_x_gain[mode] >> 1) & 0x1) pd_gains++;
 940         if ((ee->ee_x_gain[mode] >> 2) & 0x1) pd_gains++;
 941         if ((ee->ee_x_gain[mode] >> 3) & 0x1) pd_gains++;
 942         ee->ee_pd_gains[mode] = pd_gains;
 943
 944         offset = ath5k_cal_data_offset_2413(ee, mode);
 945         ee->ee_n_piers[mode] = 0;
 946         switch (mode) {
 947         case AR5K_EEPROM_MODE_11A:
 948                 if (!AR5K_EEPROM_HDR_11A(ee->ee_header))
 949                         return 0;
 950
 951                 ath5k_eeprom_init_11a_pcal_freq(ah, offset);
 952                 offset += AR5K_EEPROM_N_5GHZ_CHAN / 2;
 953                 gen_chan_info = ee->ee_pwr_cal_a;
 954                 break;
 955         case AR5K_EEPROM_MODE_11B:
 956                 if (!AR5K_EEPROM_HDR_11B(ee->ee_header))
 957                         return 0;
 958
 959                 ath5k_eeprom_init_11bg_2413(ah, mode, offset);
 960                 offset += AR5K_EEPROM_N_2GHZ_CHAN_2413 / 2;
 961                 gen_chan_info = ee->ee_pwr_cal_b;
 962                 break;
 963         case AR5K_EEPROM_MODE_11G:
 964                 if (!AR5K_EEPROM_HDR_11G(ee->ee_header))
 965                         return 0;
 966
 967                 ath5k_eeprom_init_11bg_2413(ah, mode, offset);
 968                 offset += AR5K_EEPROM_N_2GHZ_CHAN_2413 / 2;
 969                 gen_chan_info = ee->ee_pwr_cal_g;
 970                 break;
 971         default:
 972                 return -EINVAL;
 973         }
 974
 975         if (pd_gains == 0)
 976                 return 0;
 977
 978         for (i = 0; i < ee->ee_n_piers[mode]; i++) {
 979                 chan_pcal_info = &gen_chan_info[i].rf2413_info;
 980
 981                 /*
 982                  * Read pwr_i, pddac_i and the first
 983                  * 2 pd points (pwr, pddac)
 984                  */
 985                 AR5K_EEPROM_READ(offset++, val);
 986                 chan_pcal_info->pwr_i[0] = val & 0x1f;
 987                 chan_pcal_info->pddac_i[0] = (val >> 5) & 0x7f;
 988                 chan_pcal_info->pwr[0][0] =
 989                                         (val >> 12) & 0xf;
 990
 991                 AR5K_EEPROM_READ(offset++, val);
 992                 chan_pcal_info->pddac[0][0] = val & 0x3f;
 993                 chan_pcal_info->pwr[0][1] = (val >> 6) & 0xf;
 994                 chan_pcal_info->pddac[0][1] =
 995                                         (val >> 10) & 0x3f;
 996
 997                 AR5K_EEPROM_READ(offset++, val);
 998                 chan_pcal_info->pwr[0][2] = val & 0xf;
 999                 chan_pcal_info->pddac[0][2] =
1000                                         (val >> 4) & 0x3f;
1001
1002                 chan_pcal_info->pwr[0][3] = 0;
1003                 chan_pcal_info->pddac[0][3] = 0;
1004
1005                 if (pd_gains > 1) {
1006                         /*
1007                          * Pd gain 0 is not the last pd gain
1008                          * so it only has 2 pd points.
1009                          * Continue wih pd gain 1.
1010                          */
1011                         chan_pcal_info->pwr_i[1] = (val >> 10) & 0x1f;
1012
1013                         chan_pcal_info->pddac_i[1] = (val >> 15) & 0x1;
1014                         AR5K_EEPROM_READ(offset++, val);
1015                         chan_pcal_info->pddac_i[1] |= (val & 0x3F) << 1;
1016
1017                         chan_pcal_info->pwr[1][0] = (val >> 6) & 0xf;
1018                         chan_pcal_info->pddac[1][0] =
1019                                                 (val >> 10) & 0x3f;
1020
1021                         AR5K_EEPROM_READ(offset++, val);
1022                         chan_pcal_info->pwr[1][1] = val & 0xf;
1023                         chan_pcal_info->pddac[1][1] =
1024                                                 (val >> 4) & 0x3f;
1025                         chan_pcal_info->pwr[1][2] =
1026                                                 (val >> 10) & 0xf;
1027
1028                         chan_pcal_info->pddac[1][2] =
1029                                                 (val >> 14) & 0x3;
1030                         AR5K_EEPROM_READ(offset++, val);
1031                         chan_pcal_info->pddac[1][2] |=
1032                                                 (val & 0xF) << 2;
1033
1034                         chan_pcal_info->pwr[1][3] = 0;
1035                         chan_pcal_info->pddac[1][3] = 0;
1036                 } else if (pd_gains == 1) {
1037                         /*
1038                          * Pd gain 0 is the last one so
1039                          * read the extra point.
1040                          */
1041                         chan_pcal_info->pwr[0][3] =
1042                                                 (val >> 10) & 0xf;
1043
1044                         chan_pcal_info->pddac[0][3] =
1045                                                 (val >> 14) & 0x3;
1046                         AR5K_EEPROM_READ(offset++, val);
1047                         chan_pcal_info->pddac[0][3] |=
1048                                                 (val & 0xF) << 2;
1049                 }
1050
1051                 /*
1052                  * Proceed with the other pd_gains
1053                  * as above.
1054                  */
1055                 if (pd_gains > 2) {
1056                         chan_pcal_info->pwr_i[2] = (val >> 4) & 0x1f;
1057                         chan_pcal_info->pddac_i[2] = (val >> 9) & 0x7f;
1058
1059                         AR5K_EEPROM_READ(offset++, val);
1060                         chan_pcal_info->pwr[2][0] =
1061                                                 (val >> 0) & 0xf;
1062                         chan_pcal_info->pddac[2][0] =
1063                                                 (val >> 4) & 0x3f;
1064                         chan_pcal_info->pwr[2][1] =
1065                                                 (val >> 10) & 0xf;
1066
1067                         chan_pcal_info->pddac[2][1] =
1068                                                 (val >> 14) & 0x3;
1069                         AR5K_EEPROM_READ(offset++, val);
1070                         chan_pcal_info->pddac[2][1] |=
1071                                                 (val & 0xF) << 2;
1072
1073                         chan_pcal_info->pwr[2][2] =
1074                                                 (val >> 4) & 0xf;
1075                         chan_pcal_info->pddac[2][2] =
1076                                                 (val >> 8) & 0x3f;
1077
1078                         chan_pcal_info->pwr[2][3] = 0;
1079                         chan_pcal_info->pddac[2][3] = 0;
1080                 } else if (pd_gains == 2) {
1081                         chan_pcal_info->pwr[1][3] =
1082                                                 (val >> 4) & 0xf;
1083                         chan_pcal_info->pddac[1][3] =
1084                                                 (val >> 8) & 0x3f;
1085                 }
1086
1087                 if (pd_gains > 3) {
1088                         chan_pcal_info->pwr_i[3] = (val >> 14) & 0x3;
1089                         AR5K_EEPROM_READ(offset++, val);
1090                         chan_pcal_info->pwr_i[3] |= ((val >> 0) & 0x7) << 2;
1091
1092                         chan_pcal_info->pddac_i[3] = (val >> 3) & 0x7f;
1093                         chan_pcal_info->pwr[3][0] =
1094                                                 (val >> 10) & 0xf;
1095                         chan_pcal_info->pddac[3][0] =
1096                                                 (val >> 14) & 0x3;
1097
1098                         AR5K_EEPROM_READ(offset++, val);
1099                         chan_pcal_info->pddac[3][0] |=
1100                                                 (val & 0xF) << 2;
1101                         chan_pcal_info->pwr[3][1] =
1102                                                 (val >> 4) & 0xf;
1103                         chan_pcal_info->pddac[3][1] =
1104                                                 (val >> 8) & 0x3f;
1105
1106                         chan_pcal_info->pwr[3][2] =
1107                                                 (val >> 14) & 0x3;
1108                         AR5K_EEPROM_READ(offset++, val);
1109                         chan_pcal_info->pwr[3][2] |=
1110                                                 ((val >> 0) & 0x3) << 2;
1111
1112                         chan_pcal_info->pddac[3][2] =
1113                                                 (val >> 2) & 0x3f;
1114                         chan_pcal_info->pwr[3][3] =
1115                                                 (val >> 8) & 0xf;
1116
1117                         chan_pcal_info->pddac[3][3] =
1118                                                 (val >> 12) & 0xF;
1119                         AR5K_EEPROM_READ(offset++, val);
1120                         chan_pcal_info->pddac[3][3] |=
1121                                                 ((val >> 0) & 0x3) << 4;
1122                 } else if (pd_gains == 3) {
1123                         chan_pcal_info->pwr[2][3] =
1124                                                 (val >> 14) & 0x3;
1125                         AR5K_EEPROM_READ(offset++, val);
1126                         chan_pcal_info->pwr[2][3] |=
1127                                                 ((val >> 0) & 0x3) << 2;
1128
1129                         chan_pcal_info->pddac[2][3] =
1130                                                 (val >> 2) & 0x3f;
1131                 }
1132
1133                 for (c = 0; c < pd_gains; c++) {
1134                         /* Recreate pwr table for this channel using pwr steps */
1135                         chan_pcal_info->pwr[c][0] += chan_pcal_info->pwr_i[c] * 2;
1136                         chan_pcal_info->pwr[c][1] += chan_pcal_info->pwr[c][0];
1137                         chan_pcal_info->pwr[c][2] += chan_pcal_info->pwr[c][1];
1138                         chan_pcal_info->pwr[c][3] += chan_pcal_info->pwr[c][2];
1139                         if (chan_pcal_info->pwr[c][3] == chan_pcal_info->pwr[c][2])
1140                                 chan_pcal_info->pwr[c][3] = 0;
1141
1142                         /* Recreate pddac table for this channel using pddac steps */
1143                         chan_pcal_info->pddac[c][0] += chan_pcal_info->pddac_i[c];
1144                         chan_pcal_info->pddac[c][1] += chan_pcal_info->pddac[c][0];
1145                         chan_pcal_info->pddac[c][2] += chan_pcal_info->pddac[c][1];
1146                         chan_pcal_info->pddac[c][3] += chan_pcal_info->pddac[c][2];
1147                         if (chan_pcal_info->pddac[c][3] == chan_pcal_info->pddac[c][2])
1148                                 chan_pcal_info->pddac[c][3] = 0;
1149                 }
1150         }
1151
1152         return 0;
1153 }
1154
1155 /*
1156  * Read per rate target power (this is the maximum tx power
1157  * supported by the card). This info is used when setting
1158  * tx power, no matter the channel.
1159  *
1160  * This also works for v5 EEPROMs.
1161  */
1162 static int ath5k_eeprom_read_target_rate_pwr_info(struct ath5k_hw *ah, unsigned int mode)
1163 {
1164         struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1165         struct ath5k_rate_pcal_info *rate_pcal_info;
1166         u16 *rate_target_pwr_num;
1167         u32 offset;
1168         u16 val;
1169         int ret, i;
1170
1171         offset = AR5K_EEPROM_TARGET_PWRSTART(ee->ee_misc1);
1172         rate_target_pwr_num = &ee->ee_rate_target_pwr_num[mode];
1173         switch (mode) {
1174         case AR5K_EEPROM_MODE_11A:
1175                 offset += AR5K_EEPROM_TARGET_PWR_OFF_11A(ee->ee_version);
1176                 rate_pcal_info = ee->ee_rate_tpwr_a;
1177                 ee->ee_rate_target_pwr_num[mode] = AR5K_EEPROM_N_5GHZ_CHAN;
1178                 break;
1179         case AR5K_EEPROM_MODE_11B:
1180                 offset += AR5K_EEPROM_TARGET_PWR_OFF_11B(ee->ee_version);
1181                 rate_pcal_info = ee->ee_rate_tpwr_b;
1182                 ee->ee_rate_target_pwr_num[mode] = 2; /* 3rd is g mode's 1st */
1183                 break;
1184         case AR5K_EEPROM_MODE_11G:
1185                 offset += AR5K_EEPROM_TARGET_PWR_OFF_11G(ee->ee_version);
1186                 rate_pcal_info = ee->ee_rate_tpwr_g;
1187                 ee->ee_rate_target_pwr_num[mode] = AR5K_EEPROM_N_2GHZ_CHAN;
1188                 break;
1189         default:
1190                 return -EINVAL;
1191         }
1192
1193         /* Different freq mask for older eeproms (<= v3.2) */
1194         if (ee->ee_version <= AR5K_EEPROM_VERSION_3_2) {
1195                 for (i = 0; i < (*rate_target_pwr_num); i++) {
1196                         AR5K_EEPROM_READ(offset++, val);
1197                         rate_pcal_info[i].freq =
1198                             ath5k_eeprom_bin2freq(ee, (val >> 9) & 0x7f, mode);
1199
1200                         rate_pcal_info[i].target_power_6to24 = ((val >> 3) & 0x3f);
1201                         rate_pcal_info[i].target_power_36 = (val << 3) & 0x3f;
1202
1203                         AR5K_EEPROM_READ(offset++, val);
1204
1205                         if (rate_pcal_info[i].freq == AR5K_EEPROM_CHANNEL_DIS ||
1206                             val == 0) {
1207                                 (*rate_target_pwr_num) = i;
1208                                 break;
1209                         }
1210
1211                         rate_pcal_info[i].target_power_36 |= ((val >> 13) & 0x7);
1212                         rate_pcal_info[i].target_power_48 = ((val >> 7) & 0x3f);
1213                         rate_pcal_info[i].target_power_54 = ((val >> 1) & 0x3f);
1214                 }
1215         } else {
1216                 for (i = 0; i < (*rate_target_pwr_num); i++) {
1217                         AR5K_EEPROM_READ(offset++, val);
1218                         rate_pcal_info[i].freq =
1219                             ath5k_eeprom_bin2freq(ee, (val >> 8) & 0xff, mode);
1220
1221                         rate_pcal_info[i].target_power_6to24 = ((val >> 2) & 0x3f);
1222                         rate_pcal_info[i].target_power_36 = (val << 4) & 0x3f;
1223
1224                         AR5K_EEPROM_READ(offset++, val);
1225
1226                         if (rate_pcal_info[i].freq == AR5K_EEPROM_CHANNEL_DIS ||
1227                             val == 0) {
1228                                 (*rate_target_pwr_num) = i;
1229                                 break;
1230                         }
1231
1232                         rate_pcal_info[i].target_power_36 |= (val >> 12) & 0xf;
1233                         rate_pcal_info[i].target_power_48 = ((val >> 6) & 0x3f);
1234                         rate_pcal_info[i].target_power_54 = (val & 0x3f);
1235                 }
1236         }
1237
1238         return 0;
1239 }
1240
1241 /*
1242  * Read per channel calibration info from EEPROM
1243  *
1244  * This info is used to calibrate the baseband power table. Imagine
1245  * that for each channel there is a power curve that's hw specific
1246  * (depends on amplifier etc) and we try to "correct" this curve using
1247  * offests we pass on to phy chip (baseband -> before amplifier) so that
1248  * it can use accurate power values when setting tx power (takes amplifier's
1249  * performance on each channel into account).
1250  *
1251  * EEPROM provides us with the offsets for some pre-calibrated channels
1252  * and we have to interpolate to create the full table for these channels and
1253  * also the table for any channel.
1254  */
1255 static int
1256 ath5k_eeprom_read_pcal_info(struct ath5k_hw *ah)
1257 {
1258         struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1259         int (*read_pcal)(struct ath5k_hw *hw, int mode);
1260         int mode;
1261         int err;
1262
1263         if ((ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_0) &&
1264                         (AR5K_EEPROM_EEMAP(ee->ee_misc0) == 1))
1265                 read_pcal = ath5k_eeprom_read_pcal_info_5112;
1266         else if ((ah->ah_ee_version >= AR5K_EEPROM_VERSION_5_0) &&
1267                         (AR5K_EEPROM_EEMAP(ee->ee_misc0) == 2))
1268                 read_pcal = ath5k_eeprom_read_pcal_info_2413;
1269         else
1270                 read_pcal = ath5k_eeprom_read_pcal_info_5111;
1271
1272         for (mode = AR5K_EEPROM_MODE_11A; mode <= AR5K_EEPROM_MODE_11G; mode++) {
1273                 err = read_pcal(ah, mode);
1274                 if (err)
1275                         return err;
1276
1277                 err = ath5k_eeprom_read_target_rate_pwr_info(ah, mode);
1278                 if (err < 0)
1279                         return err;
1280         }
1281
1282         return 0;
1283 }
1284
1285 /* Read conformance test limits used for regulatory control */
1286 static int
1287 ath5k_eeprom_read_ctl_info(struct ath5k_hw *ah)
1288 {
1289         struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1290         struct ath5k_edge_power *rep;
1291         unsigned int fmask, pmask;
1292         unsigned int ctl_mode;
1293         int ret, i, j;
1294         u32 offset;
1295         u16 val;
1296
1297         pmask = AR5K_EEPROM_POWER_M;
1298         fmask = AR5K_EEPROM_FREQ_M(ee->ee_version);
1299         offset = AR5K_EEPROM_CTL(ee->ee_version);
1300         ee->ee_ctls = AR5K_EEPROM_N_CTLS(ee->ee_version);
1301         for (i = 0; i < ee->ee_ctls; i += 2) {
1302                 AR5K_EEPROM_READ(offset++, val);
1303                 ee->ee_ctl[i] = (val >> 8) & 0xff;
1304                 ee->ee_ctl[i + 1] = val & 0xff;
1305         }
1306
1307         offset = AR5K_EEPROM_GROUP8_OFFSET;
1308         if (ee->ee_version >= AR5K_EEPROM_VERSION_4_0)
1309                 offset += AR5K_EEPROM_TARGET_PWRSTART(ee->ee_misc1) -
1310                         AR5K_EEPROM_GROUP5_OFFSET;
1311         else
1312                 offset += AR5K_EEPROM_GROUPS_START(ee->ee_version);
1313
1314         rep = ee->ee_ctl_pwr;
1315         for(i = 0; i < ee->ee_ctls; i++) {
1316                 switch(ee->ee_ctl[i] & AR5K_CTL_MODE_M) {
1317                 case AR5K_CTL_11A:
1318                 case AR5K_CTL_TURBO:
1319                         ctl_mode = AR5K_EEPROM_MODE_11A;
1320                         break;
1321                 default:
1322                         ctl_mode = AR5K_EEPROM_MODE_11G;
1323                         break;
1324                 }
1325                 if (ee->ee_ctl[i] == 0) {
1326                         if (ee->ee_version >= AR5K_EEPROM_VERSION_3_3)
1327                                 offset += 8;
1328                         else
1329                                 offset += 7;
1330                         rep += AR5K_EEPROM_N_EDGES;
1331                         continue;
1332                 }
1333                 if (ee->ee_version >= AR5K_EEPROM_VERSION_3_3) {
1334                         for (j = 0; j < AR5K_EEPROM_N_EDGES; j += 2) {
1335                                 AR5K_EEPROM_READ(offset++, val);
1336                                 rep[j].freq = (val >> 8) & fmask;
1337                                 rep[j + 1].freq = val & fmask;
1338                         }
1339                         for (j = 0; j < AR5K_EEPROM_N_EDGES; j += 2) {
1340                                 AR5K_EEPROM_READ(offset++, val);
1341                                 rep[j].edge = (val >> 8) & pmask;
1342                                 rep[j].flag = (val >> 14) & 1;
1343                                 rep[j + 1].edge = val & pmask;
1344                                 rep[j + 1].flag = (val >> 6) & 1;
1345                         }
1346                 } else {
1347                         AR5K_EEPROM_READ(offset++, val);
1348                         rep[0].freq = (val >> 9) & fmask;
1349                         rep[1].freq = (val >> 2) & fmask;
1350                         rep[2].freq = (val << 5) & fmask;
1351
1352                         AR5K_EEPROM_READ(offset++, val);
1353                         rep[2].freq |= (val >> 11) & 0x1f;
1354                         rep[3].freq = (val >> 4) & fmask;
1355                         rep[4].freq = (val << 3) & fmask;
1356
1357                         AR5K_EEPROM_READ(offset++, val);
1358                         rep[4].freq |= (val >> 13) & 0x7;
1359                         rep[5].freq = (val >> 6) & fmask;
1360                         rep[6].freq = (val << 1) & fmask;
1361
1362                         AR5K_EEPROM_READ(offset++, val);
1363                         rep[6].freq |= (val >> 15) & 0x1;
1364                         rep[7].freq = (val >> 8) & fmask;
1365
1366                         rep[0].edge = (val >> 2) & pmask;
1367                         rep[1].edge = (val << 4) & pmask;
1368
1369                         AR5K_EEPROM_READ(offset++, val);
1370                         rep[1].edge |= (val >> 12) & 0xf;
1371                         rep[2].edge = (val >> 6) & pmask;
1372                         rep[3].edge = val & pmask;
1373
1374                         AR5K_EEPROM_READ(offset++, val);
1375                         rep[4].edge = (val >> 10) & pmask;
1376                         rep[5].edge = (val >> 4) & pmask;
1377                         rep[6].edge = (val << 2) & pmask;
1378
1379                         AR5K_EEPROM_READ(offset++, val);
1380                         rep[6].edge |= (val >> 14) & 0x3;
1381                         rep[7].edge = (val >> 8) & pmask;
1382                 }
1383                 for (j = 0; j < AR5K_EEPROM_N_EDGES; j++) {
1384                         rep[j].freq = ath5k_eeprom_bin2freq(ee,
1385                                 rep[j].freq, ctl_mode);
1386                 }
1387                 rep += AR5K_EEPROM_N_EDGES;
1388         }
1389
1390         return 0;
1391 }
1392
1393
1394 /*
1395  * Initialize eeprom power tables
1396  */
1397 int
1398 ath5k_eeprom_init(struct ath5k_hw *ah)
1399 {
1400         int err;
1401
1402         err = ath5k_eeprom_init_header(ah);
1403         if (err < 0)
1404                 return err;
1405
1406         err = ath5k_eeprom_init_modes(ah);
1407         if (err < 0)
1408                 return err;
1409
1410         err = ath5k_eeprom_read_pcal_info(ah);
1411         if (err < 0)
1412                 return err;
1413
1414         err = ath5k_eeprom_read_ctl_info(ah);
1415         if (err < 0)
1416                 return err;
1417
1418         return 0;
1419 }
1420 /*
1421  * Read the MAC address from eeprom
1422  */
1423 int ath5k_eeprom_read_mac(struct ath5k_hw *ah, u8 *mac)
1424 {
1425         u8 mac_d[ETH_ALEN];
1426         u32 total, offset;
1427         u16 data;
1428         int octet, ret;
1429
1430         memset(mac, 0, ETH_ALEN);
1431         memset(mac_d, 0, ETH_ALEN);
1432
1433         ret = ath5k_hw_eeprom_read(ah, 0x20, &data);
1434         if (ret)
1435                 return ret;
1436
1437         for (offset = 0x1f, octet = 0, total = 0; offset >= 0x1d; offset--) {
1438                 ret = ath5k_hw_eeprom_read(ah, offset, &data);
1439                 if (ret)
1440                         return ret;
1441
1442                 total += data;
1443                 mac_d[octet + 1] = data & 0xff;
1444                 mac_d[octet] = data >> 8;
1445                 octet += 2;
1446         }
1447
1448         memcpy(mac, mac_d, ETH_ALEN);
1449
1450         if (!total || total == 3 * 0xffff)
1451                 return -EINVAL;
1452
1453         return 0;
1454 }
1455