drivers/net/wireless/ath/ath9k/eeprom.c

   1 /*
   2  * Copyright (c) 2008-2011 Atheros Communications Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include "hw.h"
  18
  19 void ath9k_hw_analog_shift_regwrite(struct ath_hw *ah, u32 reg, u32 val)
  20 {
  21         REG_WRITE(ah, reg, val);
  22
  23         if (ah->config.analog_shiftreg)
  24                 udelay(100);
  25 }
  26
  27 void ath9k_hw_analog_shift_rmw(struct ath_hw *ah, u32 reg, u32 mask,
  28                                u32 shift, u32 val)
  29 {
  30         u32 regVal;
  31
  32         regVal = REG_READ(ah, reg) & ~mask;
  33         regVal |= (val << shift) & mask;
  34
  35         REG_WRITE(ah, reg, regVal);
  36
  37         if (ah->config.analog_shiftreg)
  38                 udelay(100);
  39 }
  40
  41 int16_t ath9k_hw_interpolate(u16 target, u16 srcLeft, u16 srcRight,
  42                              int16_t targetLeft, int16_t targetRight)
  43 {
  44         int16_t rv;
  45
  46         if (srcRight == srcLeft) {
  47                 rv = targetLeft;
  48         } else {
  49                 rv = (int16_t) (((target - srcLeft) * targetRight +
  50                                  (srcRight - target) * targetLeft) /
  51                                 (srcRight - srcLeft));
  52         }
  53         return rv;
  54 }
  55
  56 bool ath9k_hw_get_lower_upper_index(u8 target, u8 *pList, u16 listSize,
  57                                     u16 *indexL, u16 *indexR)
  58 {
  59         u16 i;
  60
  61         if (target <= pList[0]) {
  62                 *indexL = *indexR = 0;
  63                 return true;
  64         }
  65         if (target >= pList[listSize - 1]) {
  66                 *indexL = *indexR = (u16) (listSize - 1);
  67                 return true;
  68         }
  69
  70         for (i = 0; i < listSize - 1; i++) {
  71                 if (pList[i] == target) {
  72                         *indexL = *indexR = i;
  73                         return true;
  74                 }
  75                 if (target < pList[i + 1]) {
  76                         *indexL = i;
  77                         *indexR = (u16) (i + 1);
  78                         return false;
  79                 }
  80         }
  81         return false;
  82 }
  83
  84 void ath9k_hw_usb_gen_fill_eeprom(struct ath_hw *ah, u16 *eep_data,
  85                                   int eep_start_loc, int size)
  86 {
  87         int i = 0, j, addr;
  88         u32 addrdata[8];
  89         u32 data[8];
  90
  91         for (addr = 0; addr < size; addr++) {
  92                 addrdata[i] = AR5416_EEPROM_OFFSET +
  93                         ((addr + eep_start_loc) << AR5416_EEPROM_S);
  94                 i++;
  95                 if (i == 8) {
  96                         REG_READ_MULTI(ah, addrdata, data, i);
  97
  98                         for (j = 0; j < i; j++) {
  99                                 *eep_data = data[j];
 100                                 eep_data++;
 101                         }
 102                         i = 0;
 103                 }
 104         }
 105
 106         if (i != 0) {
 107                 REG_READ_MULTI(ah, addrdata, data, i);
 108
 109                 for (j = 0; j < i; j++) {
 110                         *eep_data = data[j];
 111                         eep_data++;
 112                 }
 113         }
 114 }
 115
 116 bool ath9k_hw_nvram_read(struct ath_common *common, u32 off, u16 *data)
 117 {
 118         return common->bus_ops->eeprom_read(common, off, data);
 119 }
 120
 121 void ath9k_hw_fill_vpd_table(u8 pwrMin, u8 pwrMax, u8 *pPwrList,
 122                              u8 *pVpdList, u16 numIntercepts,
 123                              u8 *pRetVpdList)
 124 {
 125         u16 i, k;
 126         u8 currPwr = pwrMin;
 127         u16 idxL = 0, idxR = 0;
 128
 129         for (i = 0; i <= (pwrMax - pwrMin) / 2; i++) {
 130                 ath9k_hw_get_lower_upper_index(currPwr, pPwrList,
 131                                                numIntercepts, &(idxL),
 132                                                &(idxR));
 133                 if (idxR < 1)
 134                         idxR = 1;
 135                 if (idxL == numIntercepts - 1)
 136                         idxL = (u16) (numIntercepts - 2);
 137                 if (pPwrList[idxL] == pPwrList[idxR])
 138                         k = pVpdList[idxL];
 139                 else
 140                         k = (u16)(((currPwr - pPwrList[idxL]) * pVpdList[idxR] +
 141                                    (pPwrList[idxR] - currPwr) * pVpdList[idxL]) /
 142                                   (pPwrList[idxR] - pPwrList[idxL]));
 143                 pRetVpdList[i] = (u8) k;
 144                 currPwr += 2;
 145         }
 146 }
 147
 148 void ath9k_hw_get_legacy_target_powers(struct ath_hw *ah,
 149                                        struct ath9k_channel *chan,
 150                                        struct cal_target_power_leg *powInfo,
 151                                        u16 numChannels,
 152                                        struct cal_target_power_leg *pNewPower,
 153                                        u16 numRates, bool isExtTarget)
 154 {
 155         struct chan_centers centers;
 156         u16 clo, chi;
 157         int i;
 158         int matchIndex = -1, lowIndex = -1;
 159         u16 freq;
 160
 161         ath9k_hw_get_channel_centers(ah, chan, &centers);
 162         freq = (isExtTarget) ? centers.ext_center : centers.ctl_center;
 163
 164         if (freq <= ath9k_hw_fbin2freq(powInfo[0].bChannel,
 165                                        IS_CHAN_2GHZ(chan))) {
 166                 matchIndex = 0;
 167         } else {
 168                 for (i = 0; (i < numChannels) &&
 169                              (powInfo[i].bChannel != AR5416_BCHAN_UNUSED); i++) {
 170                         if (freq == ath9k_hw_fbin2freq(powInfo[i].bChannel,
 171                                                        IS_CHAN_2GHZ(chan))) {
 172                                 matchIndex = i;
 173                                 break;
 174                         } else if (freq < ath9k_hw_fbin2freq(powInfo[i].bChannel,
 175                                                 IS_CHAN_2GHZ(chan)) && i > 0 &&
 176                                    freq > ath9k_hw_fbin2freq(powInfo[i - 1].bChannel,
 177                                                 IS_CHAN_2GHZ(chan))) {
 178                                 lowIndex = i - 1;
 179                                 break;
 180                         }
 181                 }
 182                 if ((matchIndex == -1) && (lowIndex == -1))
 183                         matchIndex = i - 1;
 184         }
 185
 186         if (matchIndex != -1) {
 187                 *pNewPower = powInfo[matchIndex];
 188         } else {
 189                 clo = ath9k_hw_fbin2freq(powInfo[lowIndex].bChannel,
 190                                          IS_CHAN_2GHZ(chan));
 191                 chi = ath9k_hw_fbin2freq(powInfo[lowIndex + 1].bChannel,
 192                                          IS_CHAN_2GHZ(chan));
 193
 194                 for (i = 0; i < numRates; i++) {
 195                         pNewPower->tPow2x[i] =
 196                                 (u8)ath9k_hw_interpolate(freq, clo, chi,
 197                                                 powInfo[lowIndex].tPow2x[i],
 198                                                 powInfo[lowIndex + 1].tPow2x[i]);
 199                 }
 200         }
 201 }
 202
 203 void ath9k_hw_get_target_powers(struct ath_hw *ah,
 204                                 struct ath9k_channel *chan,
 205                                 struct cal_target_power_ht *powInfo,
 206                                 u16 numChannels,
 207                                 struct cal_target_power_ht *pNewPower,
 208                                 u16 numRates, bool isHt40Target)
 209 {
 210         struct chan_centers centers;
 211         u16 clo, chi;
 212         int i;
 213         int matchIndex = -1, lowIndex = -1;
 214         u16 freq;
 215
 216         ath9k_hw_get_channel_centers(ah, chan, &centers);
 217         freq = isHt40Target ? centers.synth_center : centers.ctl_center;
 218
 219         if (freq <= ath9k_hw_fbin2freq(powInfo[0].bChannel, IS_CHAN_2GHZ(chan))) {
 220                 matchIndex = 0;
 221         } else {
 222                 for (i = 0; (i < numChannels) &&
 223                              (powInfo[i].bChannel != AR5416_BCHAN_UNUSED); i++) {
 224                         if (freq == ath9k_hw_fbin2freq(powInfo[i].bChannel,
 225                                                        IS_CHAN_2GHZ(chan))) {
 226                                 matchIndex = i;
 227                                 break;
 228                         } else
 229                                 if (freq < ath9k_hw_fbin2freq(powInfo[i].bChannel,
 230                                                 IS_CHAN_2GHZ(chan)) && i > 0 &&
 231                                     freq > ath9k_hw_fbin2freq(powInfo[i - 1].bChannel,
 232                                                 IS_CHAN_2GHZ(chan))) {
 233                                         lowIndex = i - 1;
 234                                         break;
 235                                 }
 236                 }
 237                 if ((matchIndex == -1) && (lowIndex == -1))
 238                         matchIndex = i - 1;
 239         }
 240
 241         if (matchIndex != -1) {
 242                 *pNewPower = powInfo[matchIndex];
 243         } else {
 244                 clo = ath9k_hw_fbin2freq(powInfo[lowIndex].bChannel,
 245                                          IS_CHAN_2GHZ(chan));
 246                 chi = ath9k_hw_fbin2freq(powInfo[lowIndex + 1].bChannel,
 247                                          IS_CHAN_2GHZ(chan));
 248
 249                 for (i = 0; i < numRates; i++) {
 250                         pNewPower->tPow2x[i] = (u8)ath9k_hw_interpolate(freq,
 251                                                 clo, chi,
 252                                                 powInfo[lowIndex].tPow2x[i],
 253                                                 powInfo[lowIndex + 1].tPow2x[i]);
 254                 }
 255         }
 256 }
 257
 258 u16 ath9k_hw_get_max_edge_power(u16 freq, struct cal_ctl_edges *pRdEdgesPower,
 259                                 bool is2GHz, int num_band_edges)
 260 {
 261         u16 twiceMaxEdgePower = MAX_RATE_POWER;
 262         int i;
 263
 264         for (i = 0; (i < num_band_edges) &&
 265                      (pRdEdgesPower[i].bChannel != AR5416_BCHAN_UNUSED); i++) {
 266                 if (freq == ath9k_hw_fbin2freq(pRdEdgesPower[i].bChannel, is2GHz)) {
 267                         twiceMaxEdgePower = CTL_EDGE_TPOWER(pRdEdgesPower[i].ctl);
 268                         break;
 269                 } else if ((i > 0) &&
 270                            (freq < ath9k_hw_fbin2freq(pRdEdgesPower[i].bChannel,
 271                                                       is2GHz))) {
 272                         if (ath9k_hw_fbin2freq(pRdEdgesPower[i - 1].bChannel,
 273                                                is2GHz) < freq &&
 274                             CTL_EDGE_FLAGS(pRdEdgesPower[i - 1].ctl)) {
 275                                 twiceMaxEdgePower =
 276                                         CTL_EDGE_TPOWER(pRdEdgesPower[i - 1].ctl);
 277                         }
 278                         break;
 279                 }
 280         }
 281
 282         return twiceMaxEdgePower;
 283 }
 284
 285 u16 ath9k_hw_get_scaled_power(struct ath_hw *ah, u16 power_limit,
 286                               u8 antenna_reduction)
 287 {
 288         u16 reduction = antenna_reduction;
 289
 290         /*
 291          * Reduce scaled Power by number of chains active
 292          * to get the per chain tx power level.
 293          */
 294         switch (ar5416_get_ntxchains(ah->txchainmask)) {
 295         case 1:
 296                 break;
 297         case 2:
 298                 reduction += POWER_CORRECTION_FOR_TWO_CHAIN;
 299                 break;
 300         case 3:
 301                 reduction += POWER_CORRECTION_FOR_THREE_CHAIN;
 302                 break;
 303         }
 304
 305         if (power_limit > reduction)
 306                 power_limit -= reduction;
 307         else
 308                 power_limit = 0;
 309
 310         return power_limit;
 311 }
 312
 313 void ath9k_hw_update_regulatory_maxpower(struct ath_hw *ah)
 314 {
 315         struct ath_common *common = ath9k_hw_common(ah);
 316         struct ath_regulatory *regulatory = ath9k_hw_regulatory(ah);
 317
 318         switch (ar5416_get_ntxchains(ah->txchainmask)) {
 319         case 1:
 320                 break;
 321         case 2:
 322                 regulatory->max_power_level += POWER_CORRECTION_FOR_TWO_CHAIN;
 323                 break;
 324         case 3:
 325                 regulatory->max_power_level += POWER_CORRECTION_FOR_THREE_CHAIN;
 326                 break;
 327         default:
 328                 ath_dbg(common, EEPROM, "Invalid chainmask configuration\n");
 329                 break;
 330         }
 331 }
 332
 333 void ath9k_hw_get_gain_boundaries_pdadcs(struct ath_hw *ah,
 334                                 struct ath9k_channel *chan,
 335                                 void *pRawDataSet,
 336                                 u8 *bChans, u16 availPiers,
 337                                 u16 tPdGainOverlap,
 338                                 u16 *pPdGainBoundaries, u8 *pPDADCValues,
 339                                 u16 numXpdGains)
 340 {
 341         int i, j, k;
 342         int16_t ss;
 343         u16 idxL = 0, idxR = 0, numPiers;
 344         static u8 vpdTableL[AR5416_NUM_PD_GAINS]
 345                 [AR5416_MAX_PWR_RANGE_IN_HALF_DB];
 346         static u8 vpdTableR[AR5416_NUM_PD_GAINS]
 347                 [AR5416_MAX_PWR_RANGE_IN_HALF_DB];
 348         static u8 vpdTableI[AR5416_NUM_PD_GAINS]
 349                 [AR5416_MAX_PWR_RANGE_IN_HALF_DB];
 350
 351         u8 *pVpdL, *pVpdR, *pPwrL, *pPwrR;
 352         u8 minPwrT4[AR5416_NUM_PD_GAINS];
 353         u8 maxPwrT4[AR5416_NUM_PD_GAINS];
 354         int16_t vpdStep;
 355         int16_t tmpVal;
 356         u16 sizeCurrVpdTable, maxIndex, tgtIndex;
 357         bool match;
 358         int16_t minDelta = 0;
 359         struct chan_centers centers;
 360         int pdgain_boundary_default;
 361         struct cal_data_per_freq *data_def = pRawDataSet;
 362         struct cal_data_per_freq_4k *data_4k = pRawDataSet;
 363         struct cal_data_per_freq_ar9287 *data_9287 = pRawDataSet;
 364         bool eeprom_4k = AR_SREV_9285(ah) || AR_SREV_9271(ah);
 365         int intercepts;
 366
 367         if (AR_SREV_9287(ah))
 368                 intercepts = AR9287_PD_GAIN_ICEPTS;
 369         else
 370                 intercepts = AR5416_PD_GAIN_ICEPTS;
 371
 372         memset(&minPwrT4, 0, AR5416_NUM_PD_GAINS);
 373         ath9k_hw_get_channel_centers(ah, chan, &centers);
 374
 375         for (numPiers = 0; numPiers < availPiers; numPiers++) {
 376                 if (bChans[numPiers] == AR5416_BCHAN_UNUSED)
 377                         break;
 378         }
 379
 380         match = ath9k_hw_get_lower_upper_index((u8)FREQ2FBIN(centers.synth_center,
 381                                                              IS_CHAN_2GHZ(chan)),
 382                                                bChans, numPiers, &idxL, &idxR);
 383
 384         if (match) {
 385                 if (AR_SREV_9287(ah)) {
 386                         /* FIXME: array overrun? */
 387                         for (i = 0; i < numXpdGains; i++) {
 388                                 minPwrT4[i] = data_9287[idxL].pwrPdg[i][0];
 389                                 maxPwrT4[i] = data_9287[idxL].pwrPdg[i][4];
 390                                 ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
 391                                                 data_9287[idxL].pwrPdg[i],
 392                                                 data_9287[idxL].vpdPdg[i],
 393                                                 intercepts,
 394                                                 vpdTableI[i]);
 395                         }
 396                 } else if (eeprom_4k) {
 397                         for (i = 0; i < numXpdGains; i++) {
 398                                 minPwrT4[i] = data_4k[idxL].pwrPdg[i][0];
 399                                 maxPwrT4[i] = data_4k[idxL].pwrPdg[i][4];
 400                                 ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
 401                                                 data_4k[idxL].pwrPdg[i],
 402                                                 data_4k[idxL].vpdPdg[i],
 403                                                 intercepts,
 404                                                 vpdTableI[i]);
 405                         }
 406                 } else {
 407                         for (i = 0; i < numXpdGains; i++) {
 408                                 minPwrT4[i] = data_def[idxL].pwrPdg[i][0];
 409                                 maxPwrT4[i] = data_def[idxL].pwrPdg[i][4];
 410                                 ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
 411                                                 data_def[idxL].pwrPdg[i],
 412                                                 data_def[idxL].vpdPdg[i],
 413                                                 intercepts,
 414                                                 vpdTableI[i]);
 415                         }
 416                 }
 417         } else {
 418                 for (i = 0; i < numXpdGains; i++) {
 419                         if (AR_SREV_9287(ah)) {
 420                                 pVpdL = data_9287[idxL].vpdPdg[i];
 421                                 pPwrL = data_9287[idxL].pwrPdg[i];
 422                                 pVpdR = data_9287[idxR].vpdPdg[i];
 423                                 pPwrR = data_9287[idxR].pwrPdg[i];
 424                         } else if (eeprom_4k) {
 425                                 pVpdL = data_4k[idxL].vpdPdg[i];
 426                                 pPwrL = data_4k[idxL].pwrPdg[i];
 427                                 pVpdR = data_4k[idxR].vpdPdg[i];
 428                                 pPwrR = data_4k[idxR].pwrPdg[i];
 429                         } else {
 430                                 pVpdL = data_def[idxL].vpdPdg[i];
 431                                 pPwrL = data_def[idxL].pwrPdg[i];
 432                                 pVpdR = data_def[idxR].vpdPdg[i];
 433                                 pPwrR = data_def[idxR].pwrPdg[i];
 434                         }
 435
 436                         minPwrT4[i] = max(pPwrL[0], pPwrR[0]);
 437
 438                         maxPwrT4[i] =
 439                                 min(pPwrL[intercepts - 1],
 440                                     pPwrR[intercepts - 1]);
 441
 442
 443                         ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
 444                                                 pPwrL, pVpdL,
 445                                                 intercepts,
 446                                                 vpdTableL[i]);
 447                         ath9k_hw_fill_vpd_table(minPwrT4[i], maxPwrT4[i],
 448                                                 pPwrR, pVpdR,
 449                                                 intercepts,
 450                                                 vpdTableR[i]);
 451
 452                         for (j = 0; j <= (maxPwrT4[i] - minPwrT4[i]) / 2; j++) {
 453                                 vpdTableI[i][j] =
 454                                         (u8)(ath9k_hw_interpolate((u16)
 455                                              FREQ2FBIN(centers.
 456                                                        synth_center,
 457                                                        IS_CHAN_2GHZ
 458                                                        (chan)),
 459                                              bChans[idxL], bChans[idxR],
 460                                              vpdTableL[i][j], vpdTableR[i][j]));
 461                         }
 462                 }
 463         }
 464
 465         k = 0;
 466
 467         for (i = 0; i < numXpdGains; i++) {
 468                 if (i == (numXpdGains - 1))
 469                         pPdGainBoundaries[i] =
 470                                 (u16)(maxPwrT4[i] / 2);
 471                 else
 472                         pPdGainBoundaries[i] =
 473                                 (u16)((maxPwrT4[i] + minPwrT4[i + 1]) / 4);
 474
 475                 pPdGainBoundaries[i] =
 476                         min((u16)MAX_RATE_POWER, pPdGainBoundaries[i]);
 477
 478                 minDelta = 0;
 479
 480                 if (i == 0) {
 481                         if (AR_SREV_9280_20_OR_LATER(ah))
 482                                 ss = (int16_t)(0 - (minPwrT4[i] / 2));
 483                         else
 484                                 ss = 0;
 485                 } else {
 486                         ss = (int16_t)((pPdGainBoundaries[i - 1] -
 487                                         (minPwrT4[i] / 2)) -
 488                                        tPdGainOverlap + 1 + minDelta);
 489                 }
 490                 vpdStep = (int16_t)(vpdTableI[i][1] - vpdTableI[i][0]);
 491                 vpdStep = (int16_t)((vpdStep < 1) ? 1 : vpdStep);
 492
 493                 while ((ss < 0) && (k < (AR5416_NUM_PDADC_VALUES - 1))) {
 494                         tmpVal = (int16_t)(vpdTableI[i][0] + ss * vpdStep);
 495                         pPDADCValues[k++] = (u8)((tmpVal < 0) ? 0 : tmpVal);
 496                         ss++;
 497                 }
 498
 499                 sizeCurrVpdTable = (u8) ((maxPwrT4[i] - minPwrT4[i]) / 2 + 1);
 500                 tgtIndex = (u8)(pPdGainBoundaries[i] + tPdGainOverlap -
 501                                 (minPwrT4[i] / 2));
 502                 maxIndex = (tgtIndex < sizeCurrVpdTable) ?
 503                         tgtIndex : sizeCurrVpdTable;
 504
 505                 while ((ss < maxIndex) && (k < (AR5416_NUM_PDADC_VALUES - 1))) {
 506                         pPDADCValues[k++] = vpdTableI[i][ss++];
 507                 }
 508
 509                 vpdStep = (int16_t)(vpdTableI[i][sizeCurrVpdTable - 1] -
 510                                     vpdTableI[i][sizeCurrVpdTable - 2]);
 511                 vpdStep = (int16_t)((vpdStep < 1) ? 1 : vpdStep);
 512
 513                 if (tgtIndex >= maxIndex) {
 514                         while ((ss <= tgtIndex) &&
 515                                (k < (AR5416_NUM_PDADC_VALUES - 1))) {
 516                                 tmpVal = (int16_t)((vpdTableI[i][sizeCurrVpdTable - 1] +
 517                                                     (ss - maxIndex + 1) * vpdStep));
 518                                 pPDADCValues[k++] = (u8)((tmpVal > 255) ?
 519                                                          255 : tmpVal);
 520                                 ss++;
 521                         }
 522                 }
 523         }
 524
 525         if (eeprom_4k)
 526                 pdgain_boundary_default = 58;
 527         else
 528                 pdgain_boundary_default = pPdGainBoundaries[i - 1];
 529
 530         while (i < AR5416_PD_GAINS_IN_MASK) {
 531                 pPdGainBoundaries[i] = pdgain_boundary_default;
 532                 i++;
 533         }
 534
 535         while (k < AR5416_NUM_PDADC_VALUES) {
 536                 pPDADCValues[k] = pPDADCValues[k - 1];
 537                 k++;
 538         }
 539 }
 540
 541 int ath9k_hw_eeprom_init(struct ath_hw *ah)
 542 {
 543         int status;
 544
 545         if (AR_SREV_9300_20_OR_LATER(ah))
 546                 ah->eep_ops = &eep_ar9300_ops;
 547         else if (AR_SREV_9287(ah)) {
 548                 ah->eep_ops = &eep_ar9287_ops;
 549         } else if (AR_SREV_9285(ah) || AR_SREV_9271(ah)) {
 550                 ah->eep_ops = &eep_4k_ops;
 551         } else {
 552                 ah->eep_ops = &eep_def_ops;
 553         }
 554
 555         if (!ah->eep_ops->fill_eeprom(ah))
 556                 return -EIO;
 557
 558         status = ah->eep_ops->check_eeprom(ah);
 559
 560         return status;
 561 }