drivers/net/wireless/ath/ath9k/ar9003_calib.c

   1 /*
   2  * Copyright (c) 2010-2011 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 #include "hw-ops.h"
  19 #include "ar9003_phy.h"
  20 #include "ar9003_rtt.h"
  21 #include "ar9003_mci.h"
  22
  23 #define MAX_MEASUREMENT MAX_IQCAL_MEASUREMENT
  24 #define MAX_MAG_DELTA   11
  25 #define MAX_PHS_DELTA   10
  26
  27 struct coeff {
  28         int mag_coeff[AR9300_MAX_CHAINS][MAX_MEASUREMENT];
  29         int phs_coeff[AR9300_MAX_CHAINS][MAX_MEASUREMENT];
  30         int iqc_coeff[2];
  31 };
  32
  33 enum ar9003_cal_types {
  34         IQ_MISMATCH_CAL = BIT(0),
  35 };
  36
  37 static void ar9003_hw_setup_calibration(struct ath_hw *ah,
  38                                         struct ath9k_cal_list *currCal)
  39 {
  40         struct ath_common *common = ath9k_hw_common(ah);
  41
  42         /* Select calibration to run */
  43         switch (currCal->calData->calType) {
  44         case IQ_MISMATCH_CAL:
  45                 /*
  46                  * Start calibration with
  47                  * 2^(INIT_IQCAL_LOG_COUNT_MAX+1) samples
  48                  */
  49                 REG_RMW_FIELD(ah, AR_PHY_TIMING4,
  50                               AR_PHY_TIMING4_IQCAL_LOG_COUNT_MAX,
  51                               currCal->calData->calCountMax);
  52                 REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_IQ);
  53
  54                 ath_dbg(common, CALIBRATE,
  55                         "starting IQ Mismatch Calibration\n");
  56
  57                 /* Kick-off cal */
  58                 REG_SET_BIT(ah, AR_PHY_TIMING4, AR_PHY_TIMING4_DO_CAL);
  59                 break;
  60         default:
  61                 ath_err(common, "Invalid calibration type\n");
  62                 break;
  63         }
  64 }
  65
  66 /*
  67  * Generic calibration routine.
  68  * Recalibrate the lower PHY chips to account for temperature/environment
  69  * changes.
  70  */
  71 static bool ar9003_hw_per_calibration(struct ath_hw *ah,
  72                                       struct ath9k_channel *ichan,
  73                                       u8 rxchainmask,
  74                                       struct ath9k_cal_list *currCal)
  75 {
  76         struct ath9k_hw_cal_data *caldata = ah->caldata;
  77         /* Cal is assumed not done until explicitly set below */
  78         bool iscaldone = false;
  79
  80         /* Calibration in progress. */
  81         if (currCal->calState == CAL_RUNNING) {
  82                 /* Check to see if it has finished. */
  83                 if (!(REG_READ(ah, AR_PHY_TIMING4) & AR_PHY_TIMING4_DO_CAL)) {
  84                         /*
  85                         * Accumulate cal measures for active chains
  86                         */
  87                         currCal->calData->calCollect(ah);
  88                         ah->cal_samples++;
  89
  90                         if (ah->cal_samples >=
  91                             currCal->calData->calNumSamples) {
  92                                 unsigned int i, numChains = 0;
  93                                 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
  94                                         if (rxchainmask & (1 << i))
  95                                                 numChains++;
  96                                 }
  97
  98                                 /*
  99                                 * Process accumulated data
 100                                 */
 101                                 currCal->calData->calPostProc(ah, numChains);
 102
 103                                 /* Calibration has finished. */
 104                                 caldata->CalValid |= currCal->calData->calType;
 105                                 currCal->calState = CAL_DONE;
 106                                 iscaldone = true;
 107                         } else {
 108                         /*
 109                          * Set-up collection of another sub-sample until we
 110                          * get desired number
 111                          */
 112                         ar9003_hw_setup_calibration(ah, currCal);
 113                         }
 114                 }
 115         } else if (!(caldata->CalValid & currCal->calData->calType)) {
 116                 /* If current cal is marked invalid in channel, kick it off */
 117                 ath9k_hw_reset_calibration(ah, currCal);
 118         }
 119
 120         return iscaldone;
 121 }
 122
 123 static bool ar9003_hw_calibrate(struct ath_hw *ah,
 124                                 struct ath9k_channel *chan,
 125                                 u8 rxchainmask,
 126                                 bool longcal)
 127 {
 128         bool iscaldone = true;
 129         struct ath9k_cal_list *currCal = ah->cal_list_curr;
 130
 131         /*
 132          * For given calibration:
 133          * 1. Call generic cal routine
 134          * 2. When this cal is done (isCalDone) if we have more cals waiting
 135          *    (eg after reset), mask this to upper layers by not propagating
 136          *    isCalDone if it is set to TRUE.
 137          *    Instead, change isCalDone to FALSE and setup the waiting cal(s)
 138          *    to be run.
 139          */
 140         if (currCal &&
 141             (currCal->calState == CAL_RUNNING ||
 142              currCal->calState == CAL_WAITING)) {
 143                 iscaldone = ar9003_hw_per_calibration(ah, chan,
 144                                                       rxchainmask, currCal);
 145                 if (iscaldone) {
 146                         ah->cal_list_curr = currCal = currCal->calNext;
 147
 148                         if (currCal->calState == CAL_WAITING) {
 149                                 iscaldone = false;
 150                                 ath9k_hw_reset_calibration(ah, currCal);
 151                         }
 152                 }
 153         }
 154
 155         /*
 156          * Do NF cal only at longer intervals. Get the value from
 157          * the previous NF cal and update history buffer.
 158          */
 159         if (longcal && ath9k_hw_getnf(ah, chan)) {
 160                 /*
 161                  * Load the NF from history buffer of the current channel.
 162                  * NF is slow time-variant, so it is OK to use a historical
 163                  * value.
 164                  */
 165                 ath9k_hw_loadnf(ah, ah->curchan);
 166
 167                 /* start NF calibration, without updating BB NF register */
 168                 ath9k_hw_start_nfcal(ah, false);
 169         }
 170
 171         return iscaldone;
 172 }
 173
 174 static void ar9003_hw_iqcal_collect(struct ath_hw *ah)
 175 {
 176         int i;
 177
 178         /* Accumulate IQ cal measures for active chains */
 179         for (i = 0; i < AR5416_MAX_CHAINS; i++) {
 180                 if (ah->txchainmask & BIT(i)) {
 181                         ah->totalPowerMeasI[i] +=
 182                                 REG_READ(ah, AR_PHY_CAL_MEAS_0(i));
 183                         ah->totalPowerMeasQ[i] +=
 184                                 REG_READ(ah, AR_PHY_CAL_MEAS_1(i));
 185                         ah->totalIqCorrMeas[i] +=
 186                                 (int32_t) REG_READ(ah, AR_PHY_CAL_MEAS_2(i));
 187                         ath_dbg(ath9k_hw_common(ah), CALIBRATE,
 188                                 "%d: Chn %d pmi=0x%08x;pmq=0x%08x;iqcm=0x%08x;\n",
 189                                 ah->cal_samples, i, ah->totalPowerMeasI[i],
 190                                 ah->totalPowerMeasQ[i],
 191                                 ah->totalIqCorrMeas[i]);
 192                 }
 193         }
 194 }
 195
 196 static void ar9003_hw_iqcalibrate(struct ath_hw *ah, u8 numChains)
 197 {
 198         struct ath_common *common = ath9k_hw_common(ah);
 199         u32 powerMeasQ, powerMeasI, iqCorrMeas;
 200         u32 qCoffDenom, iCoffDenom;
 201         int32_t qCoff, iCoff;
 202         int iqCorrNeg, i;
 203         static const u_int32_t offset_array[3] = {
 204                 AR_PHY_RX_IQCAL_CORR_B0,
 205                 AR_PHY_RX_IQCAL_CORR_B1,
 206                 AR_PHY_RX_IQCAL_CORR_B2,
 207         };
 208
 209         for (i = 0; i < numChains; i++) {
 210                 powerMeasI = ah->totalPowerMeasI[i];
 211                 powerMeasQ = ah->totalPowerMeasQ[i];
 212                 iqCorrMeas = ah->totalIqCorrMeas[i];
 213
 214                 ath_dbg(common, CALIBRATE,
 215                         "Starting IQ Cal and Correction for Chain %d\n", i);
 216
 217                 ath_dbg(common, CALIBRATE,
 218                         "Original: Chn %d iq_corr_meas = 0x%08x\n",
 219                         i, ah->totalIqCorrMeas[i]);
 220
 221                 iqCorrNeg = 0;
 222
 223                 if (iqCorrMeas > 0x80000000) {
 224                         iqCorrMeas = (0xffffffff - iqCorrMeas) + 1;
 225                         iqCorrNeg = 1;
 226                 }
 227
 228                 ath_dbg(common, CALIBRATE, "Chn %d pwr_meas_i = 0x%08x\n",
 229                         i, powerMeasI);
 230                 ath_dbg(common, CALIBRATE, "Chn %d pwr_meas_q = 0x%08x\n",
 231                         i, powerMeasQ);
 232                 ath_dbg(common, CALIBRATE, "iqCorrNeg is 0x%08x\n", iqCorrNeg);
 233
 234                 iCoffDenom = (powerMeasI / 2 + powerMeasQ / 2) / 256;
 235                 qCoffDenom = powerMeasQ / 64;
 236
 237                 if ((iCoffDenom != 0) && (qCoffDenom != 0)) {
 238                         iCoff = iqCorrMeas / iCoffDenom;
 239                         qCoff = powerMeasI / qCoffDenom - 64;
 240                         ath_dbg(common, CALIBRATE, "Chn %d iCoff = 0x%08x\n",
 241                                 i, iCoff);
 242                         ath_dbg(common, CALIBRATE, "Chn %d qCoff = 0x%08x\n",
 243                                 i, qCoff);
 244
 245                         /* Force bounds on iCoff */
 246                         if (iCoff >= 63)
 247                                 iCoff = 63;
 248                         else if (iCoff <= -63)
 249                                 iCoff = -63;
 250
 251                         /* Negate iCoff if iqCorrNeg == 0 */
 252                         if (iqCorrNeg == 0x0)
 253                                 iCoff = -iCoff;
 254
 255                         /* Force bounds on qCoff */
 256                         if (qCoff >= 63)
 257                                 qCoff = 63;
 258                         else if (qCoff <= -63)
 259                                 qCoff = -63;
 260
 261                         iCoff = iCoff & 0x7f;
 262                         qCoff = qCoff & 0x7f;
 263
 264                         ath_dbg(common, CALIBRATE,
 265                                 "Chn %d : iCoff = 0x%x  qCoff = 0x%x\n",
 266                                 i, iCoff, qCoff);
 267                         ath_dbg(common, CALIBRATE,
 268                                 "Register offset (0x%04x) before update = 0x%x\n",
 269                                 offset_array[i],
 270                                 REG_READ(ah, offset_array[i]));
 271
 272                         if (AR_SREV_9565(ah) &&
 273                             (iCoff == 63 || qCoff == 63 ||
 274                              iCoff == -63 || qCoff == -63))
 275                                 return;
 276
 277                         REG_RMW_FIELD(ah, offset_array[i],
 278                                       AR_PHY_RX_IQCAL_CORR_IQCORR_Q_I_COFF,
 279                                       iCoff);
 280                         REG_RMW_FIELD(ah, offset_array[i],
 281                                       AR_PHY_RX_IQCAL_CORR_IQCORR_Q_Q_COFF,
 282                                       qCoff);
 283                         ath_dbg(common, CALIBRATE,
 284                                 "Register offset (0x%04x) QI COFF (bitfields 0x%08x) after update = 0x%x\n",
 285                                 offset_array[i],
 286                                 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_I_COFF,
 287                                 REG_READ(ah, offset_array[i]));
 288                         ath_dbg(common, CALIBRATE,
 289                                 "Register offset (0x%04x) QQ COFF (bitfields 0x%08x) after update = 0x%x\n",
 290                                 offset_array[i],
 291                                 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_Q_COFF,
 292                                 REG_READ(ah, offset_array[i]));
 293
 294                         ath_dbg(common, CALIBRATE,
 295                                 "IQ Cal and Correction done for Chain %d\n", i);
 296                 }
 297         }
 298
 299         REG_SET_BIT(ah, AR_PHY_RX_IQCAL_CORR_B0,
 300                     AR_PHY_RX_IQCAL_CORR_IQCORR_ENABLE);
 301         ath_dbg(common, CALIBRATE,
 302                 "IQ Cal and Correction (offset 0x%04x) enabled (bit position 0x%08x). New Value 0x%08x\n",
 303                 (unsigned) (AR_PHY_RX_IQCAL_CORR_B0),
 304                 AR_PHY_RX_IQCAL_CORR_IQCORR_ENABLE,
 305                 REG_READ(ah, AR_PHY_RX_IQCAL_CORR_B0));
 306 }
 307
 308 static const struct ath9k_percal_data iq_cal_single_sample = {
 309         IQ_MISMATCH_CAL,
 310         MIN_CAL_SAMPLES,
 311         PER_MAX_LOG_COUNT,
 312         ar9003_hw_iqcal_collect,
 313         ar9003_hw_iqcalibrate
 314 };
 315
 316 static void ar9003_hw_init_cal_settings(struct ath_hw *ah)
 317 {
 318         ah->iq_caldata.calData = &iq_cal_single_sample;
 319
 320         if (AR_SREV_9300_20_OR_LATER(ah)) {
 321                 ah->enabled_cals |= TX_IQ_CAL;
 322                 if (AR_SREV_9485_OR_LATER(ah) && !AR_SREV_9340(ah))
 323                         ah->enabled_cals |= TX_IQ_ON_AGC_CAL;
 324         }
 325
 326         ah->supp_cals = IQ_MISMATCH_CAL;
 327 }
 328
 329 /*
 330  * solve 4x4 linear equation used in loopback iq cal.
 331  */
 332 static bool ar9003_hw_solve_iq_cal(struct ath_hw *ah,
 333                                    s32 sin_2phi_1,
 334                                    s32 cos_2phi_1,
 335                                    s32 sin_2phi_2,
 336                                    s32 cos_2phi_2,
 337                                    s32 mag_a0_d0,
 338                                    s32 phs_a0_d0,
 339                                    s32 mag_a1_d0,
 340                                    s32 phs_a1_d0,
 341                                    s32 solved_eq[])
 342 {
 343         s32 f1 = cos_2phi_1 - cos_2phi_2,
 344             f3 = sin_2phi_1 - sin_2phi_2,
 345             f2;
 346         s32 mag_tx, phs_tx, mag_rx, phs_rx;
 347         const s32 result_shift = 1 << 15;
 348         struct ath_common *common = ath9k_hw_common(ah);
 349
 350         f2 = (f1 * f1 + f3 * f3) / result_shift;
 351
 352         if (!f2) {
 353                 ath_dbg(common, CALIBRATE, "Divide by 0\n");
 354                 return false;
 355         }
 356
 357         /* mag mismatch, tx */
 358         mag_tx = f1 * (mag_a0_d0  - mag_a1_d0) + f3 * (phs_a0_d0 - phs_a1_d0);
 359         /* phs mismatch, tx */
 360         phs_tx = f3 * (-mag_a0_d0 + mag_a1_d0) + f1 * (phs_a0_d0 - phs_a1_d0);
 361
 362         mag_tx = (mag_tx / f2);
 363         phs_tx = (phs_tx / f2);
 364
 365         /* mag mismatch, rx */
 366         mag_rx = mag_a0_d0 - (cos_2phi_1 * mag_tx + sin_2phi_1 * phs_tx) /
 367                  result_shift;
 368         /* phs mismatch, rx */
 369         phs_rx = phs_a0_d0 + (sin_2phi_1 * mag_tx - cos_2phi_1 * phs_tx) /
 370                  result_shift;
 371
 372         solved_eq[0] = mag_tx;
 373         solved_eq[1] = phs_tx;
 374         solved_eq[2] = mag_rx;
 375         solved_eq[3] = phs_rx;
 376
 377         return true;
 378 }
 379
 380 static s32 ar9003_hw_find_mag_approx(struct ath_hw *ah, s32 in_re, s32 in_im)
 381 {
 382         s32 abs_i = abs(in_re),
 383             abs_q = abs(in_im),
 384             max_abs, min_abs;
 385
 386         if (abs_i > abs_q) {
 387                 max_abs = abs_i;
 388                 min_abs = abs_q;
 389         } else {
 390                 max_abs = abs_q;
 391                 min_abs = abs_i;
 392         }
 393
 394         return max_abs - (max_abs / 32) + (min_abs / 8) + (min_abs / 4);
 395 }
 396
 397 #define DELPT 32
 398
 399 static bool ar9003_hw_calc_iq_corr(struct ath_hw *ah,
 400                                    s32 chain_idx,
 401                                    const s32 iq_res[],
 402                                    s32 iqc_coeff[])
 403 {
 404         s32 i2_m_q2_a0_d0, i2_p_q2_a0_d0, iq_corr_a0_d0,
 405             i2_m_q2_a0_d1, i2_p_q2_a0_d1, iq_corr_a0_d1,
 406             i2_m_q2_a1_d0, i2_p_q2_a1_d0, iq_corr_a1_d0,
 407             i2_m_q2_a1_d1, i2_p_q2_a1_d1, iq_corr_a1_d1;
 408         s32 mag_a0_d0, mag_a1_d0, mag_a0_d1, mag_a1_d1,
 409             phs_a0_d0, phs_a1_d0, phs_a0_d1, phs_a1_d1,
 410             sin_2phi_1, cos_2phi_1,
 411             sin_2phi_2, cos_2phi_2;
 412         s32 mag_tx, phs_tx, mag_rx, phs_rx;
 413         s32 solved_eq[4], mag_corr_tx, phs_corr_tx, mag_corr_rx, phs_corr_rx,
 414             q_q_coff, q_i_coff;
 415         const s32 res_scale = 1 << 15;
 416         const s32 delpt_shift = 1 << 8;
 417         s32 mag1, mag2;
 418         struct ath_common *common = ath9k_hw_common(ah);
 419
 420         i2_m_q2_a0_d0 = iq_res[0] & 0xfff;
 421         i2_p_q2_a0_d0 = (iq_res[0] >> 12) & 0xfff;
 422         iq_corr_a0_d0 = ((iq_res[0] >> 24) & 0xff) + ((iq_res[1] & 0xf) << 8);
 423
 424         if (i2_m_q2_a0_d0 > 0x800)
 425                 i2_m_q2_a0_d0 = -((0xfff - i2_m_q2_a0_d0) + 1);
 426
 427         if (i2_p_q2_a0_d0 > 0x800)
 428                 i2_p_q2_a0_d0 = -((0xfff - i2_p_q2_a0_d0) + 1);
 429
 430         if (iq_corr_a0_d0 > 0x800)
 431                 iq_corr_a0_d0 = -((0xfff - iq_corr_a0_d0) + 1);
 432
 433         i2_m_q2_a0_d1 = (iq_res[1] >> 4) & 0xfff;
 434         i2_p_q2_a0_d1 = (iq_res[2] & 0xfff);
 435         iq_corr_a0_d1 = (iq_res[2] >> 12) & 0xfff;
 436
 437         if (i2_m_q2_a0_d1 > 0x800)
 438                 i2_m_q2_a0_d1 = -((0xfff - i2_m_q2_a0_d1) + 1);
 439
 440         if (i2_p_q2_a0_d1 > 0x800)
 441                 i2_p_q2_a0_d1 = -((0xfff - i2_p_q2_a0_d1) + 1);
 442
 443         if (iq_corr_a0_d1 > 0x800)
 444                 iq_corr_a0_d1 = -((0xfff - iq_corr_a0_d1) + 1);
 445
 446         i2_m_q2_a1_d0 = ((iq_res[2] >> 24) & 0xff) + ((iq_res[3] & 0xf) << 8);
 447         i2_p_q2_a1_d0 = (iq_res[3] >> 4) & 0xfff;
 448         iq_corr_a1_d0 = iq_res[4] & 0xfff;
 449
 450         if (i2_m_q2_a1_d0 > 0x800)
 451                 i2_m_q2_a1_d0 = -((0xfff - i2_m_q2_a1_d0) + 1);
 452
 453         if (i2_p_q2_a1_d0 > 0x800)
 454                 i2_p_q2_a1_d0 = -((0xfff - i2_p_q2_a1_d0) + 1);
 455
 456         if (iq_corr_a1_d0 > 0x800)
 457                 iq_corr_a1_d0 = -((0xfff - iq_corr_a1_d0) + 1);
 458
 459         i2_m_q2_a1_d1 = (iq_res[4] >> 12) & 0xfff;
 460         i2_p_q2_a1_d1 = ((iq_res[4] >> 24) & 0xff) + ((iq_res[5] & 0xf) << 8);
 461         iq_corr_a1_d1 = (iq_res[5] >> 4) & 0xfff;
 462
 463         if (i2_m_q2_a1_d1 > 0x800)
 464                 i2_m_q2_a1_d1 = -((0xfff - i2_m_q2_a1_d1) + 1);
 465
 466         if (i2_p_q2_a1_d1 > 0x800)
 467                 i2_p_q2_a1_d1 = -((0xfff - i2_p_q2_a1_d1) + 1);
 468
 469         if (iq_corr_a1_d1 > 0x800)
 470                 iq_corr_a1_d1 = -((0xfff - iq_corr_a1_d1) + 1);
 471
 472         if ((i2_p_q2_a0_d0 == 0) || (i2_p_q2_a0_d1 == 0) ||
 473             (i2_p_q2_a1_d0 == 0) || (i2_p_q2_a1_d1 == 0)) {
 474                 ath_dbg(common, CALIBRATE,
 475                         "Divide by 0:\n"
 476                         "a0_d0=%d\n"
 477                         "a0_d1=%d\n"
 478                         "a2_d0=%d\n"
 479                         "a1_d1=%d\n",
 480                         i2_p_q2_a0_d0, i2_p_q2_a0_d1,
 481                         i2_p_q2_a1_d0, i2_p_q2_a1_d1);
 482                 return false;
 483         }
 484
 485         mag_a0_d0 = (i2_m_q2_a0_d0 * res_scale) / i2_p_q2_a0_d0;
 486         phs_a0_d0 = (iq_corr_a0_d0 * res_scale) / i2_p_q2_a0_d0;
 487
 488         mag_a0_d1 = (i2_m_q2_a0_d1 * res_scale) / i2_p_q2_a0_d1;
 489         phs_a0_d1 = (iq_corr_a0_d1 * res_scale) / i2_p_q2_a0_d1;
 490
 491         mag_a1_d0 = (i2_m_q2_a1_d0 * res_scale) / i2_p_q2_a1_d0;
 492         phs_a1_d0 = (iq_corr_a1_d0 * res_scale) / i2_p_q2_a1_d0;
 493
 494         mag_a1_d1 = (i2_m_q2_a1_d1 * res_scale) / i2_p_q2_a1_d1;
 495         phs_a1_d1 = (iq_corr_a1_d1 * res_scale) / i2_p_q2_a1_d1;
 496
 497         /* w/o analog phase shift */
 498         sin_2phi_1 = (((mag_a0_d0 - mag_a0_d1) * delpt_shift) / DELPT);
 499         /* w/o analog phase shift */
 500         cos_2phi_1 = (((phs_a0_d1 - phs_a0_d0) * delpt_shift) / DELPT);
 501         /* w/  analog phase shift */
 502         sin_2phi_2 = (((mag_a1_d0 - mag_a1_d1) * delpt_shift) / DELPT);
 503         /* w/  analog phase shift */
 504         cos_2phi_2 = (((phs_a1_d1 - phs_a1_d0) * delpt_shift) / DELPT);
 505
 506         /*
 507          * force sin^2 + cos^2 = 1;
 508          * find magnitude by approximation
 509          */
 510         mag1 = ar9003_hw_find_mag_approx(ah, cos_2phi_1, sin_2phi_1);
 511         mag2 = ar9003_hw_find_mag_approx(ah, cos_2phi_2, sin_2phi_2);
 512
 513         if ((mag1 == 0) || (mag2 == 0)) {
 514                 ath_dbg(common, CALIBRATE, "Divide by 0: mag1=%d, mag2=%d\n",
 515                         mag1, mag2);
 516                 return false;
 517         }
 518
 519         /* normalization sin and cos by mag */
 520         sin_2phi_1 = (sin_2phi_1 * res_scale / mag1);
 521         cos_2phi_1 = (cos_2phi_1 * res_scale / mag1);
 522         sin_2phi_2 = (sin_2phi_2 * res_scale / mag2);
 523         cos_2phi_2 = (cos_2phi_2 * res_scale / mag2);
 524
 525         /* calculate IQ mismatch */
 526         if (!ar9003_hw_solve_iq_cal(ah,
 527                              sin_2phi_1, cos_2phi_1,
 528                              sin_2phi_2, cos_2phi_2,
 529                              mag_a0_d0, phs_a0_d0,
 530                              mag_a1_d0,
 531                              phs_a1_d0, solved_eq)) {
 532                 ath_dbg(common, CALIBRATE,
 533                         "Call to ar9003_hw_solve_iq_cal() failed\n");
 534                 return false;
 535         }
 536
 537         mag_tx = solved_eq[0];
 538         phs_tx = solved_eq[1];
 539         mag_rx = solved_eq[2];
 540         phs_rx = solved_eq[3];
 541
 542         ath_dbg(common, CALIBRATE,
 543                 "chain %d: mag mismatch=%d phase mismatch=%d\n",
 544                 chain_idx, mag_tx/res_scale, phs_tx/res_scale);
 545
 546         if (res_scale == mag_tx) {
 547                 ath_dbg(common, CALIBRATE,
 548                         "Divide by 0: mag_tx=%d, res_scale=%d\n",
 549                         mag_tx, res_scale);
 550                 return false;
 551         }
 552
 553         /* calculate and quantize Tx IQ correction factor */
 554         mag_corr_tx = (mag_tx * res_scale) / (res_scale - mag_tx);
 555         phs_corr_tx = -phs_tx;
 556
 557         q_q_coff = (mag_corr_tx * 128 / res_scale);
 558         q_i_coff = (phs_corr_tx * 256 / res_scale);
 559
 560         ath_dbg(common, CALIBRATE, "tx chain %d: mag corr=%d  phase corr=%d\n",
 561                 chain_idx, q_q_coff, q_i_coff);
 562
 563         if (q_i_coff < -63)
 564                 q_i_coff = -63;
 565         if (q_i_coff > 63)
 566                 q_i_coff = 63;
 567         if (q_q_coff < -63)
 568                 q_q_coff = -63;
 569         if (q_q_coff > 63)
 570                 q_q_coff = 63;
 571
 572         iqc_coeff[0] = (q_q_coff * 128) + q_i_coff;
 573
 574         ath_dbg(common, CALIBRATE, "tx chain %d: iq corr coeff=%x\n",
 575                 chain_idx, iqc_coeff[0]);
 576
 577         if (-mag_rx == res_scale) {
 578                 ath_dbg(common, CALIBRATE,
 579                         "Divide by 0: mag_rx=%d, res_scale=%d\n",
 580                         mag_rx, res_scale);
 581                 return false;
 582         }
 583
 584         /* calculate and quantize Rx IQ correction factors */
 585         mag_corr_rx = (-mag_rx * res_scale) / (res_scale + mag_rx);
 586         phs_corr_rx = -phs_rx;
 587
 588         q_q_coff = (mag_corr_rx * 128 / res_scale);
 589         q_i_coff = (phs_corr_rx * 256 / res_scale);
 590
 591         ath_dbg(common, CALIBRATE, "rx chain %d: mag corr=%d  phase corr=%d\n",
 592                 chain_idx, q_q_coff, q_i_coff);
 593
 594         if (q_i_coff < -63)
 595                 q_i_coff = -63;
 596         if (q_i_coff > 63)
 597                 q_i_coff = 63;
 598         if (q_q_coff < -63)
 599                 q_q_coff = -63;
 600         if (q_q_coff > 63)
 601                 q_q_coff = 63;
 602
 603         iqc_coeff[1] = (q_q_coff * 128) + q_i_coff;
 604
 605         ath_dbg(common, CALIBRATE, "rx chain %d: iq corr coeff=%x\n",
 606                 chain_idx, iqc_coeff[1]);
 607
 608         return true;
 609 }
 610
 611 static void ar9003_hw_detect_outlier(int *mp_coeff, int nmeasurement,
 612                                      int max_delta)
 613 {
 614         int mp_max = -64, max_idx = 0;
 615         int mp_min = 63, min_idx = 0;
 616         int mp_avg = 0, i, outlier_idx = 0, mp_count = 0;
 617
 618         /* find min/max mismatch across all calibrated gains */
 619         for (i = 0; i < nmeasurement; i++) {
 620                 if (mp_coeff[i] > mp_max) {
 621                         mp_max = mp_coeff[i];
 622                         max_idx = i;
 623                 } else if (mp_coeff[i] < mp_min) {
 624                         mp_min = mp_coeff[i];
 625                         min_idx = i;
 626                 }
 627         }
 628
 629         /* find average (exclude max abs value) */
 630         for (i = 0; i < nmeasurement; i++) {
 631                 if ((abs(mp_coeff[i]) < abs(mp_max)) ||
 632                     (abs(mp_coeff[i]) < abs(mp_min))) {
 633                         mp_avg += mp_coeff[i];
 634                         mp_count++;
 635                 }
 636         }
 637
 638         /*
 639          * finding mean magnitude/phase if possible, otherwise
 640          * just use the last value as the mean
 641          */
 642         if (mp_count)
 643                 mp_avg /= mp_count;
 644         else
 645                 mp_avg = mp_coeff[nmeasurement - 1];
 646
 647         /* detect outlier */
 648         if (abs(mp_max - mp_min) > max_delta) {
 649                 if (abs(mp_max - mp_avg) > abs(mp_min - mp_avg))
 650                         outlier_idx = max_idx;
 651                 else
 652                         outlier_idx = min_idx;
 653
 654                 mp_coeff[outlier_idx] = mp_avg;
 655         }
 656 }
 657
 658 static void ar9003_hw_tx_iqcal_load_avg_2_passes(struct ath_hw *ah,
 659                                                  struct coeff *coeff,
 660                                                  bool is_reusable)
 661 {
 662         int i, im, nmeasurement;
 663         u32 tx_corr_coeff[MAX_MEASUREMENT][AR9300_MAX_CHAINS];
 664         struct ath9k_hw_cal_data *caldata = ah->caldata;
 665
 666         memset(tx_corr_coeff, 0, sizeof(tx_corr_coeff));
 667         for (i = 0; i < MAX_MEASUREMENT / 2; i++) {
 668                 tx_corr_coeff[i * 2][0] = tx_corr_coeff[(i * 2) + 1][0] =
 669                                         AR_PHY_TX_IQCAL_CORR_COEFF_B0(i);
 670                 if (!AR_SREV_9485(ah)) {
 671                         tx_corr_coeff[i * 2][1] =
 672                         tx_corr_coeff[(i * 2) + 1][1] =
 673                                         AR_PHY_TX_IQCAL_CORR_COEFF_B1(i);
 674
 675                         tx_corr_coeff[i * 2][2] =
 676                         tx_corr_coeff[(i * 2) + 1][2] =
 677                                         AR_PHY_TX_IQCAL_CORR_COEFF_B2(i);
 678                 }
 679         }
 680
 681         /* Load the average of 2 passes */
 682         for (i = 0; i < AR9300_MAX_CHAINS; i++) {
 683                 if (!(ah->txchainmask & (1 << i)))
 684                         continue;
 685                 nmeasurement = REG_READ_FIELD(ah,
 686                                 AR_PHY_TX_IQCAL_STATUS_B0,
 687                                 AR_PHY_CALIBRATED_GAINS_0);
 688
 689                 if (nmeasurement > MAX_MEASUREMENT)
 690                         nmeasurement = MAX_MEASUREMENT;
 691
 692                 /* detect outlier only if nmeasurement > 1 */
 693                 if (nmeasurement > 1) {
 694                         /* Detect magnitude outlier */
 695                         ar9003_hw_detect_outlier(coeff->mag_coeff[i],
 696                                         nmeasurement, MAX_MAG_DELTA);
 697
 698                         /* Detect phase outlier */
 699                         ar9003_hw_detect_outlier(coeff->phs_coeff[i],
 700                                         nmeasurement, MAX_PHS_DELTA);
 701                 }
 702
 703                 for (im = 0; im < nmeasurement; im++) {
 704
 705                         coeff->iqc_coeff[0] = (coeff->mag_coeff[i][im] & 0x7f) |
 706                                 ((coeff->phs_coeff[i][im] & 0x7f) << 7);
 707
 708                         if ((im % 2) == 0)
 709                                 REG_RMW_FIELD(ah, tx_corr_coeff[im][i],
 710                                         AR_PHY_TX_IQCAL_CORR_COEFF_00_COEFF_TABLE,
 711                                         coeff->iqc_coeff[0]);
 712                         else
 713                                 REG_RMW_FIELD(ah, tx_corr_coeff[im][i],
 714                                         AR_PHY_TX_IQCAL_CORR_COEFF_01_COEFF_TABLE,
 715                                         coeff->iqc_coeff[0]);
 716
 717                         if (caldata)
 718                                 caldata->tx_corr_coeff[im][i] =
 719                                         coeff->iqc_coeff[0];
 720                 }
 721                 if (caldata)
 722                         caldata->num_measures[i] = nmeasurement;
 723         }
 724
 725         REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_3,
 726                       AR_PHY_TX_IQCAL_CONTROL_3_IQCORR_EN, 0x1);
 727         REG_RMW_FIELD(ah, AR_PHY_RX_IQCAL_CORR_B0,
 728                       AR_PHY_RX_IQCAL_CORR_B0_LOOPBACK_IQCORR_EN, 0x1);
 729
 730         if (caldata)
 731                 caldata->done_txiqcal_once = is_reusable;
 732
 733         return;
 734 }
 735
 736 static bool ar9003_hw_tx_iq_cal_run(struct ath_hw *ah)
 737 {
 738         struct ath_common *common = ath9k_hw_common(ah);
 739         u8 tx_gain_forced;
 740
 741         tx_gain_forced = REG_READ_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 742                                         AR_PHY_TXGAIN_FORCE);
 743         if (tx_gain_forced)
 744                 REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 745                               AR_PHY_TXGAIN_FORCE, 0);
 746
 747         REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_START,
 748                       AR_PHY_TX_IQCAL_START_DO_CAL, 1);
 749
 750         if (!ath9k_hw_wait(ah, AR_PHY_TX_IQCAL_START,
 751                         AR_PHY_TX_IQCAL_START_DO_CAL, 0,
 752                         AH_WAIT_TIMEOUT)) {
 753                 ath_dbg(common, CALIBRATE, "Tx IQ Cal is not completed\n");
 754                 return false;
 755         }
 756         return true;
 757 }
 758
 759 static void ar9003_hw_tx_iq_cal_post_proc(struct ath_hw *ah, bool is_reusable)
 760 {
 761         struct ath_common *common = ath9k_hw_common(ah);
 762         const u32 txiqcal_status[AR9300_MAX_CHAINS] = {
 763                 AR_PHY_TX_IQCAL_STATUS_B0,
 764                 AR_PHY_TX_IQCAL_STATUS_B1,
 765                 AR_PHY_TX_IQCAL_STATUS_B2,
 766         };
 767         const u_int32_t chan_info_tab[] = {
 768                 AR_PHY_CHAN_INFO_TAB_0,
 769                 AR_PHY_CHAN_INFO_TAB_1,
 770                 AR_PHY_CHAN_INFO_TAB_2,
 771         };
 772         struct coeff coeff;
 773         s32 iq_res[6];
 774         int i, im, j;
 775         int nmeasurement;
 776
 777         for (i = 0; i < AR9300_MAX_CHAINS; i++) {
 778                 if (!(ah->txchainmask & (1 << i)))
 779                         continue;
 780
 781                 nmeasurement = REG_READ_FIELD(ah,
 782                                 AR_PHY_TX_IQCAL_STATUS_B0,
 783                                 AR_PHY_CALIBRATED_GAINS_0);
 784                 if (nmeasurement > MAX_MEASUREMENT)
 785                         nmeasurement = MAX_MEASUREMENT;
 786
 787                 for (im = 0; im < nmeasurement; im++) {
 788                         ath_dbg(common, CALIBRATE,
 789                                 "Doing Tx IQ Cal for chain %d\n", i);
 790
 791                         if (REG_READ(ah, txiqcal_status[i]) &
 792                                         AR_PHY_TX_IQCAL_STATUS_FAILED) {
 793                                 ath_dbg(common, CALIBRATE,
 794                                         "Tx IQ Cal failed for chain %d\n", i);
 795                                 goto tx_iqcal_fail;
 796                         }
 797
 798                         for (j = 0; j < 3; j++) {
 799                                 u32 idx = 2 * j, offset = 4 * (3 * im + j);
 800
 801                                 REG_RMW_FIELD(ah,
 802                                                 AR_PHY_CHAN_INFO_MEMORY,
 803                                                 AR_PHY_CHAN_INFO_TAB_S2_READ,
 804                                                 0);
 805
 806                                 /* 32 bits */
 807                                 iq_res[idx] = REG_READ(ah,
 808                                                 chan_info_tab[i] +
 809                                                 offset);
 810
 811                                 REG_RMW_FIELD(ah,
 812                                                 AR_PHY_CHAN_INFO_MEMORY,
 813                                                 AR_PHY_CHAN_INFO_TAB_S2_READ,
 814                                                 1);
 815
 816                                 /* 16 bits */
 817                                 iq_res[idx + 1] = 0xffff & REG_READ(ah,
 818                                                 chan_info_tab[i] + offset);
 819
 820                                 ath_dbg(common, CALIBRATE,
 821                                         "IQ_RES[%d]=0x%x IQ_RES[%d]=0x%x\n",
 822                                         idx, iq_res[idx], idx + 1,
 823                                         iq_res[idx + 1]);
 824                         }
 825
 826                         if (!ar9003_hw_calc_iq_corr(ah, i, iq_res,
 827                                                 coeff.iqc_coeff)) {
 828                                 ath_dbg(common, CALIBRATE,
 829                                         "Failed in calculation of IQ correction\n");
 830                                 goto tx_iqcal_fail;
 831                         }
 832
 833                         coeff.mag_coeff[i][im] = coeff.iqc_coeff[0] & 0x7f;
 834                         coeff.phs_coeff[i][im] =
 835                                 (coeff.iqc_coeff[0] >> 7) & 0x7f;
 836
 837                         if (coeff.mag_coeff[i][im] > 63)
 838                                 coeff.mag_coeff[i][im] -= 128;
 839                         if (coeff.phs_coeff[i][im] > 63)
 840                                 coeff.phs_coeff[i][im] -= 128;
 841                 }
 842         }
 843         ar9003_hw_tx_iqcal_load_avg_2_passes(ah, &coeff, is_reusable);
 844
 845         return;
 846
 847 tx_iqcal_fail:
 848         ath_dbg(common, CALIBRATE, "Tx IQ Cal failed\n");
 849         return;
 850 }
 851
 852 static void ar9003_hw_tx_iq_cal_reload(struct ath_hw *ah)
 853 {
 854         struct ath9k_hw_cal_data *caldata = ah->caldata;
 855         u32 tx_corr_coeff[MAX_MEASUREMENT][AR9300_MAX_CHAINS];
 856         int i, im;
 857
 858         memset(tx_corr_coeff, 0, sizeof(tx_corr_coeff));
 859         for (i = 0; i < MAX_MEASUREMENT / 2; i++) {
 860                 tx_corr_coeff[i * 2][0] = tx_corr_coeff[(i * 2) + 1][0] =
 861                                         AR_PHY_TX_IQCAL_CORR_COEFF_B0(i);
 862                 if (!AR_SREV_9485(ah)) {
 863                         tx_corr_coeff[i * 2][1] =
 864                         tx_corr_coeff[(i * 2) + 1][1] =
 865                                         AR_PHY_TX_IQCAL_CORR_COEFF_B1(i);
 866
 867                         tx_corr_coeff[i * 2][2] =
 868                         tx_corr_coeff[(i * 2) + 1][2] =
 869                                         AR_PHY_TX_IQCAL_CORR_COEFF_B2(i);
 870                 }
 871         }
 872
 873         for (i = 0; i < AR9300_MAX_CHAINS; i++) {
 874                 if (!(ah->txchainmask & (1 << i)))
 875                         continue;
 876
 877                 for (im = 0; im < caldata->num_measures[i]; im++) {
 878                         if ((im % 2) == 0)
 879                                 REG_RMW_FIELD(ah, tx_corr_coeff[im][i],
 880                                      AR_PHY_TX_IQCAL_CORR_COEFF_00_COEFF_TABLE,
 881                                      caldata->tx_corr_coeff[im][i]);
 882                         else
 883                                 REG_RMW_FIELD(ah, tx_corr_coeff[im][i],
 884                                      AR_PHY_TX_IQCAL_CORR_COEFF_01_COEFF_TABLE,
 885                                      caldata->tx_corr_coeff[im][i]);
 886                 }
 887         }
 888
 889         REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_3,
 890                       AR_PHY_TX_IQCAL_CONTROL_3_IQCORR_EN, 0x1);
 891         REG_RMW_FIELD(ah, AR_PHY_RX_IQCAL_CORR_B0,
 892                       AR_PHY_RX_IQCAL_CORR_B0_LOOPBACK_IQCORR_EN, 0x1);
 893 }
 894
 895 static void ar9003_hw_manual_peak_cal(struct ath_hw *ah, u8 chain, bool is_2g)
 896 {
 897         int offset[8], total = 0, test;
 898         int agc_out, i;
 899
 900         REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_GAINSTAGES(chain),
 901                       AR_PHY_65NM_RXRF_GAINSTAGES_RX_OVERRIDE, 0x1);
 902         REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_GAINSTAGES(chain),
 903                       AR_PHY_65NM_RXRF_GAINSTAGES_LNAON_CALDC, 0x0);
 904         if (is_2g)
 905                 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_GAINSTAGES(chain),
 906                               AR_PHY_65NM_RXRF_GAINSTAGES_LNA2G_GAIN_OVR, 0x0);
 907         else
 908                 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_GAINSTAGES(chain),
 909                               AR_PHY_65NM_RXRF_GAINSTAGES_LNA5G_GAIN_OVR, 0x0);
 910
 911         REG_RMW_FIELD(ah, AR_PHY_65NM_RXTX2(chain),
 912                       AR_PHY_65NM_RXTX2_RXON_OVR, 0x1);
 913         REG_RMW_FIELD(ah, AR_PHY_65NM_RXTX2(chain),
 914                       AR_PHY_65NM_RXTX2_RXON, 0x0);
 915
 916         REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
 917                       AR_PHY_65NM_RXRF_AGC_AGC_OVERRIDE, 0x1);
 918         REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
 919                       AR_PHY_65NM_RXRF_AGC_AGC_ON_OVR, 0x1);
 920         REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
 921                       AR_PHY_65NM_RXRF_AGC_AGC_CAL_OVR, 0x1);
 922         if (is_2g)
 923                 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
 924                               AR_PHY_65NM_RXRF_AGC_AGC2G_DBDAC_OVR, 0x0);
 925         else
 926                 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
 927                               AR_PHY_65NM_RXRF_AGC_AGC5G_DBDAC_OVR, 0x0);
 928
 929         for (i = 6; i > 0; i--) {
 930                 offset[i] = BIT(i - 1);
 931                 test = total + offset[i];
 932
 933                 if (is_2g)
 934                         REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
 935                                       AR_PHY_65NM_RXRF_AGC_AGC2G_CALDAC_OVR,
 936                                       test);
 937                 else
 938                         REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
 939                                       AR_PHY_65NM_RXRF_AGC_AGC5G_CALDAC_OVR,
 940                                       test);
 941                 udelay(100);
 942                 agc_out = REG_READ_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
 943                                          AR_PHY_65NM_RXRF_AGC_AGC_OUT);
 944                 offset[i] = (agc_out) ? 0 : 1;
 945                 total += (offset[i] << (i - 1));
 946         }
 947
 948         if (is_2g)
 949                 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
 950                               AR_PHY_65NM_RXRF_AGC_AGC2G_CALDAC_OVR, total);
 951         else
 952                 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
 953                               AR_PHY_65NM_RXRF_AGC_AGC5G_CALDAC_OVR, total);
 954
 955         REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_GAINSTAGES(chain),
 956                       AR_PHY_65NM_RXRF_GAINSTAGES_RX_OVERRIDE, 0);
 957         REG_RMW_FIELD(ah, AR_PHY_65NM_RXTX2(chain),
 958                       AR_PHY_65NM_RXTX2_RXON_OVR, 0);
 959         REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
 960                       AR_PHY_65NM_RXRF_AGC_AGC_CAL_OVR, 0);
 961 }
 962
 963 static void ar9003_hw_do_manual_peak_cal(struct ath_hw *ah,
 964                                          struct ath9k_channel *chan)
 965 {
 966         int i;
 967
 968         if (!AR_SREV_9462(ah) && !AR_SREV_9565(ah) && !AR_SREV_9485(ah))
 969                 return;
 970
 971         for (i = 0; i < AR9300_MAX_CHAINS; i++) {
 972                 if (!(ah->rxchainmask & (1 << i)))
 973                         continue;
 974                 ar9003_hw_manual_peak_cal(ah, i, IS_CHAN_2GHZ(chan));
 975         }
 976 }
 977
 978 static void ar9003_hw_cl_cal_post_proc(struct ath_hw *ah, bool is_reusable)
 979 {
 980         u32 cl_idx[AR9300_MAX_CHAINS] = { AR_PHY_CL_TAB_0,
 981                                           AR_PHY_CL_TAB_1,
 982                                           AR_PHY_CL_TAB_2 };
 983         struct ath9k_hw_cal_data *caldata = ah->caldata;
 984         bool txclcal_done = false;
 985         int i, j;
 986
 987         if (!caldata || !(ah->enabled_cals & TX_CL_CAL))
 988                 return;
 989
 990         txclcal_done = !!(REG_READ(ah, AR_PHY_AGC_CONTROL) &
 991                           AR_PHY_AGC_CONTROL_CLC_SUCCESS);
 992
 993         if (caldata->done_txclcal_once) {
 994                 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
 995                         if (!(ah->txchainmask & (1 << i)))
 996                                 continue;
 997                         for (j = 0; j < MAX_CL_TAB_ENTRY; j++)
 998                                 REG_WRITE(ah, CL_TAB_ENTRY(cl_idx[i]),
 999                                           caldata->tx_clcal[i][j]);
1000                 }
1001         } else if (is_reusable && txclcal_done) {
1002                 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
1003                         if (!(ah->txchainmask & (1 << i)))
1004                                 continue;
1005                         for (j = 0; j < MAX_CL_TAB_ENTRY; j++)
1006                                 caldata->tx_clcal[i][j] =
1007                                         REG_READ(ah, CL_TAB_ENTRY(cl_idx[i]));
1008                 }
1009                 caldata->done_txclcal_once = true;
1010         }
1011 }
1012
1013 static bool ar9003_hw_init_cal(struct ath_hw *ah,
1014                                struct ath9k_channel *chan)
1015 {
1016         struct ath_common *common = ath9k_hw_common(ah);
1017         struct ath9k_hw_cal_data *caldata = ah->caldata;
1018         bool txiqcal_done = false;
1019         bool is_reusable = true, status = true;
1020         bool run_rtt_cal = false, run_agc_cal, sep_iq_cal = false;
1021         bool rtt = !!(ah->caps.hw_caps & ATH9K_HW_CAP_RTT);
1022         u32 agc_ctrl = 0, agc_supp_cals = AR_PHY_AGC_CONTROL_OFFSET_CAL |
1023                                           AR_PHY_AGC_CONTROL_FLTR_CAL   |
1024                                           AR_PHY_AGC_CONTROL_PKDET_CAL;
1025
1026         /* Use chip chainmask only for calibration */
1027         ar9003_hw_set_chain_masks(ah, ah->caps.rx_chainmask, ah->caps.tx_chainmask);
1028
1029         if (rtt) {
1030                 if (!ar9003_hw_rtt_restore(ah, chan))
1031                         run_rtt_cal = true;
1032
1033                 if (run_rtt_cal)
1034                         ath_dbg(common, CALIBRATE, "RTT calibration to be done\n");
1035         }
1036
1037         run_agc_cal = run_rtt_cal;
1038
1039         if (run_rtt_cal) {
1040                 ar9003_hw_rtt_enable(ah);
1041                 ar9003_hw_rtt_set_mask(ah, 0x00);
1042                 ar9003_hw_rtt_clear_hist(ah);
1043         }
1044
1045         if (rtt && !run_rtt_cal) {
1046                 agc_ctrl = REG_READ(ah, AR_PHY_AGC_CONTROL);
1047                 agc_supp_cals &= agc_ctrl;
1048                 agc_ctrl &= ~(AR_PHY_AGC_CONTROL_OFFSET_CAL |
1049                              AR_PHY_AGC_CONTROL_FLTR_CAL |
1050                              AR_PHY_AGC_CONTROL_PKDET_CAL);
1051                 REG_WRITE(ah, AR_PHY_AGC_CONTROL, agc_ctrl);
1052         }
1053
1054         if (ah->enabled_cals & TX_CL_CAL) {
1055                 if (caldata && caldata->done_txclcal_once)
1056                         REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL,
1057                                     AR_PHY_CL_CAL_ENABLE);
1058                 else {
1059                         REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL,
1060                                     AR_PHY_CL_CAL_ENABLE);
1061                         run_agc_cal = true;
1062                 }
1063         }
1064
1065         if ((IS_CHAN_HALF_RATE(chan) || IS_CHAN_QUARTER_RATE(chan)) ||
1066             !(ah->enabled_cals & TX_IQ_CAL))
1067                 goto skip_tx_iqcal;
1068
1069         /* Do Tx IQ Calibration */
1070         REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_1,
1071                       AR_PHY_TX_IQCAL_CONTROL_1_IQCORR_I_Q_COFF_DELPT,
1072                       DELPT);
1073
1074         /*
1075          * For AR9485 or later chips, TxIQ cal runs as part of
1076          * AGC calibration
1077          */
1078         if (ah->enabled_cals & TX_IQ_ON_AGC_CAL) {
1079                 if (caldata && !caldata->done_txiqcal_once)
1080                         REG_SET_BIT(ah, AR_PHY_TX_IQCAL_CONTROL_0,
1081                                     AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL);
1082                 else
1083                         REG_CLR_BIT(ah, AR_PHY_TX_IQCAL_CONTROL_0,
1084                                     AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL);
1085                 txiqcal_done = run_agc_cal = true;
1086         } else if (caldata && !caldata->done_txiqcal_once) {
1087                 run_agc_cal = true;
1088                 sep_iq_cal = true;
1089         }
1090
1091 skip_tx_iqcal:
1092         if (ath9k_hw_mci_is_enabled(ah) && IS_CHAN_2GHZ(chan) && run_agc_cal)
1093                 ar9003_mci_init_cal_req(ah, &is_reusable);
1094
1095         if (sep_iq_cal) {
1096                 txiqcal_done = ar9003_hw_tx_iq_cal_run(ah);
1097                 REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_DIS);
1098                 udelay(5);
1099                 REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN);
1100         }
1101
1102         if (run_agc_cal || !(ah->ah_flags & AH_FASTCC)) {
1103                 /* Calibrate the AGC */
1104                 REG_WRITE(ah, AR_PHY_AGC_CONTROL,
1105                           REG_READ(ah, AR_PHY_AGC_CONTROL) |
1106                           AR_PHY_AGC_CONTROL_CAL);
1107
1108                 /* Poll for offset calibration complete */
1109                 status = ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL,
1110                                        AR_PHY_AGC_CONTROL_CAL,
1111                                        0, AH_WAIT_TIMEOUT);
1112
1113                 ar9003_hw_do_manual_peak_cal(ah, chan);
1114         }
1115
1116         if (ath9k_hw_mci_is_enabled(ah) && IS_CHAN_2GHZ(chan) && run_agc_cal)
1117                 ar9003_mci_init_cal_done(ah);
1118
1119         if (rtt && !run_rtt_cal) {
1120                 agc_ctrl |= agc_supp_cals;
1121                 REG_WRITE(ah, AR_PHY_AGC_CONTROL, agc_ctrl);
1122         }
1123
1124         if (!status) {
1125                 if (run_rtt_cal)
1126                         ar9003_hw_rtt_disable(ah);
1127
1128                 ath_dbg(common, CALIBRATE,
1129                         "offset calibration failed to complete in %d ms; noisy environment?\n",
1130                         AH_WAIT_TIMEOUT / 1000);
1131                 return false;
1132         }
1133
1134         if (txiqcal_done)
1135                 ar9003_hw_tx_iq_cal_post_proc(ah, is_reusable);
1136         else if (caldata && caldata->done_txiqcal_once)
1137                 ar9003_hw_tx_iq_cal_reload(ah);
1138
1139         ar9003_hw_cl_cal_post_proc(ah, is_reusable);
1140
1141         if (run_rtt_cal && caldata) {
1142                 if (is_reusable) {
1143                         if (!ath9k_hw_rfbus_req(ah))
1144                                 ath_err(ath9k_hw_common(ah),
1145                                         "Could not stop baseband\n");
1146                         else
1147                                 ar9003_hw_rtt_fill_hist(ah);
1148
1149                         ath9k_hw_rfbus_done(ah);
1150                 }
1151
1152                 ar9003_hw_rtt_disable(ah);
1153         }
1154
1155         /* Revert chainmask to runtime parameters */
1156         ar9003_hw_set_chain_masks(ah, ah->rxchainmask, ah->txchainmask);
1157
1158         /* Initialize list pointers */
1159         ah->cal_list = ah->cal_list_last = ah->cal_list_curr = NULL;
1160
1161         INIT_CAL(&ah->iq_caldata);
1162         INSERT_CAL(ah, &ah->iq_caldata);
1163         ath_dbg(common, CALIBRATE, "enabling IQ Calibration\n");
1164
1165         /* Initialize current pointer to first element in list */
1166         ah->cal_list_curr = ah->cal_list;
1167
1168         if (ah->cal_list_curr)
1169                 ath9k_hw_reset_calibration(ah, ah->cal_list_curr);
1170
1171         if (caldata)
1172                 caldata->CalValid = 0;
1173
1174         return true;
1175 }
1176
1177 void ar9003_hw_attach_calib_ops(struct ath_hw *ah)
1178 {
1179         struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah);
1180         struct ath_hw_ops *ops = ath9k_hw_ops(ah);
1181
1182         priv_ops->init_cal_settings = ar9003_hw_init_cal_settings;
1183         priv_ops->init_cal = ar9003_hw_init_cal;
1184         priv_ops->setup_calibration = ar9003_hw_setup_calibration;
1185
1186         ops->calibrate = ar9003_hw_calibrate;
1187 }