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         TEMP_COMP_CAL = BIT(1),
  36 };
  37
  38 static void ar9003_hw_setup_calibration(struct ath_hw *ah,
  39                                         struct ath9k_cal_list *currCal)
  40 {
  41         struct ath_common *common = ath9k_hw_common(ah);
  42
  43         /* Select calibration to run */
  44         switch (currCal->calData->calType) {
  45         case IQ_MISMATCH_CAL:
  46                 /*
  47                  * Start calibration with
  48                  * 2^(INIT_IQCAL_LOG_COUNT_MAX+1) samples
  49                  */
  50                 REG_RMW_FIELD(ah, AR_PHY_TIMING4,
  51                               AR_PHY_TIMING4_IQCAL_LOG_COUNT_MAX,
  52                 currCal->calData->calCountMax);
  53                 REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_IQ);
  54
  55                 ath_dbg(common, CALIBRATE,
  56                         "starting IQ Mismatch Calibration\n");
  57
  58                 /* Kick-off cal */
  59                 REG_SET_BIT(ah, AR_PHY_TIMING4, AR_PHY_TIMING4_DO_CAL);
  60                 break;
  61         case TEMP_COMP_CAL:
  62                 REG_RMW_FIELD(ah, AR_PHY_65NM_CH0_THERM,
  63                               AR_PHY_65NM_CH0_THERM_LOCAL, 1);
  64                 REG_RMW_FIELD(ah, AR_PHY_65NM_CH0_THERM,
  65                               AR_PHY_65NM_CH0_THERM_START, 1);
  66
  67                 ath_dbg(common, CALIBRATE,
  68                         "starting Temperature Compensation Calibration\n");
  69                 break;
  70         }
  71 }
  72
  73 /*
  74  * Generic calibration routine.
  75  * Recalibrate the lower PHY chips to account for temperature/environment
  76  * changes.
  77  */
  78 static bool ar9003_hw_per_calibration(struct ath_hw *ah,
  79                                       struct ath9k_channel *ichan,
  80                                       u8 rxchainmask,
  81                                       struct ath9k_cal_list *currCal)
  82 {
  83         struct ath9k_hw_cal_data *caldata = ah->caldata;
  84         /* Cal is assumed not done until explicitly set below */
  85         bool iscaldone = false;
  86
  87         /* Calibration in progress. */
  88         if (currCal->calState == CAL_RUNNING) {
  89                 /* Check to see if it has finished. */
  90                 if (!(REG_READ(ah, AR_PHY_TIMING4) & AR_PHY_TIMING4_DO_CAL)) {
  91                         /*
  92                         * Accumulate cal measures for active chains
  93                         */
  94                         currCal->calData->calCollect(ah);
  95                         ah->cal_samples++;
  96
  97                         if (ah->cal_samples >=
  98                             currCal->calData->calNumSamples) {
  99                                 unsigned int i, numChains = 0;
 100                                 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
 101                                         if (rxchainmask & (1 << i))
 102                                                 numChains++;
 103                                 }
 104
 105                                 /*
 106                                 * Process accumulated data
 107                                 */
 108                                 currCal->calData->calPostProc(ah, numChains);
 109
 110                                 /* Calibration has finished. */
 111                                 caldata->CalValid |= currCal->calData->calType;
 112                                 currCal->calState = CAL_DONE;
 113                                 iscaldone = true;
 114                         } else {
 115                         /*
 116                          * Set-up collection of another sub-sample until we
 117                          * get desired number
 118                          */
 119                         ar9003_hw_setup_calibration(ah, currCal);
 120                         }
 121                 }
 122         } else if (!(caldata->CalValid & currCal->calData->calType)) {
 123                 /* If current cal is marked invalid in channel, kick it off */
 124                 ath9k_hw_reset_calibration(ah, currCal);
 125         }
 126
 127         return iscaldone;
 128 }
 129
 130 static bool ar9003_hw_calibrate(struct ath_hw *ah,
 131                                 struct ath9k_channel *chan,
 132                                 u8 rxchainmask,
 133                                 bool longcal)
 134 {
 135         bool iscaldone = true;
 136         struct ath9k_cal_list *currCal = ah->cal_list_curr;
 137
 138         /*
 139          * For given calibration:
 140          * 1. Call generic cal routine
 141          * 2. When this cal is done (isCalDone) if we have more cals waiting
 142          *    (eg after reset), mask this to upper layers by not propagating
 143          *    isCalDone if it is set to TRUE.
 144          *    Instead, change isCalDone to FALSE and setup the waiting cal(s)
 145          *    to be run.
 146          */
 147         if (currCal &&
 148             (currCal->calState == CAL_RUNNING ||
 149              currCal->calState == CAL_WAITING)) {
 150                 iscaldone = ar9003_hw_per_calibration(ah, chan,
 151                                                       rxchainmask, currCal);
 152                 if (iscaldone) {
 153                         ah->cal_list_curr = currCal = currCal->calNext;
 154
 155                         if (currCal->calState == CAL_WAITING) {
 156                                 iscaldone = false;
 157                                 ath9k_hw_reset_calibration(ah, currCal);
 158                         }
 159                 }
 160         }
 161
 162         /* Do NF cal only at longer intervals */
 163         if (longcal) {
 164                 /*
 165                  * Get the value from the previous NF cal and update
 166                  * history buffer.
 167                  */
 168                 ath9k_hw_getnf(ah, chan);
 169
 170                 /*
 171                  * Load the NF from history buffer of the current channel.
 172                  * NF is slow time-variant, so it is OK to use a historical
 173                  * value.
 174                  */
 175                 ath9k_hw_loadnf(ah, ah->curchan);
 176
 177                 /* start NF calibration, without updating BB NF register */
 178                 ath9k_hw_start_nfcal(ah, false);
 179         }
 180
 181         return iscaldone;
 182 }
 183
 184 static void ar9003_hw_iqcal_collect(struct ath_hw *ah)
 185 {
 186         int i;
 187
 188         /* Accumulate IQ cal measures for active chains */
 189         for (i = 0; i < AR5416_MAX_CHAINS; i++) {
 190                 if (ah->txchainmask & BIT(i)) {
 191                         ah->totalPowerMeasI[i] +=
 192                                 REG_READ(ah, AR_PHY_CAL_MEAS_0(i));
 193                         ah->totalPowerMeasQ[i] +=
 194                                 REG_READ(ah, AR_PHY_CAL_MEAS_1(i));
 195                         ah->totalIqCorrMeas[i] +=
 196                                 (int32_t) REG_READ(ah, AR_PHY_CAL_MEAS_2(i));
 197                         ath_dbg(ath9k_hw_common(ah), CALIBRATE,
 198                                 "%d: Chn %d pmi=0x%08x;pmq=0x%08x;iqcm=0x%08x;\n",
 199                                 ah->cal_samples, i, ah->totalPowerMeasI[i],
 200                                 ah->totalPowerMeasQ[i],
 201                                 ah->totalIqCorrMeas[i]);
 202                 }
 203         }
 204 }
 205
 206 static void ar9003_hw_iqcalibrate(struct ath_hw *ah, u8 numChains)
 207 {
 208         struct ath_common *common = ath9k_hw_common(ah);
 209         u32 powerMeasQ, powerMeasI, iqCorrMeas;
 210         u32 qCoffDenom, iCoffDenom;
 211         int32_t qCoff, iCoff;
 212         int iqCorrNeg, i;
 213         static const u_int32_t offset_array[3] = {
 214                 AR_PHY_RX_IQCAL_CORR_B0,
 215                 AR_PHY_RX_IQCAL_CORR_B1,
 216                 AR_PHY_RX_IQCAL_CORR_B2,
 217         };
 218
 219         for (i = 0; i < numChains; i++) {
 220                 powerMeasI = ah->totalPowerMeasI[i];
 221                 powerMeasQ = ah->totalPowerMeasQ[i];
 222                 iqCorrMeas = ah->totalIqCorrMeas[i];
 223
 224                 ath_dbg(common, CALIBRATE,
 225                         "Starting IQ Cal and Correction for Chain %d\n", i);
 226
 227                 ath_dbg(common, CALIBRATE,
 228                         "Original: Chn %d iq_corr_meas = 0x%08x\n",
 229                         i, ah->totalIqCorrMeas[i]);
 230
 231                 iqCorrNeg = 0;
 232
 233                 if (iqCorrMeas > 0x80000000) {
 234                         iqCorrMeas = (0xffffffff - iqCorrMeas) + 1;
 235                         iqCorrNeg = 1;
 236                 }
 237
 238                 ath_dbg(common, CALIBRATE, "Chn %d pwr_meas_i = 0x%08x\n",
 239                         i, powerMeasI);
 240                 ath_dbg(common, CALIBRATE, "Chn %d pwr_meas_q = 0x%08x\n",
 241                         i, powerMeasQ);
 242                 ath_dbg(common, CALIBRATE, "iqCorrNeg is 0x%08x\n", iqCorrNeg);
 243
 244                 iCoffDenom = (powerMeasI / 2 + powerMeasQ / 2) / 256;
 245                 qCoffDenom = powerMeasQ / 64;
 246
 247                 if ((iCoffDenom != 0) && (qCoffDenom != 0)) {
 248                         iCoff = iqCorrMeas / iCoffDenom;
 249                         qCoff = powerMeasI / qCoffDenom - 64;
 250                         ath_dbg(common, CALIBRATE, "Chn %d iCoff = 0x%08x\n",
 251                                 i, iCoff);
 252                         ath_dbg(common, CALIBRATE, "Chn %d qCoff = 0x%08x\n",
 253                                 i, qCoff);
 254
 255                         /* Force bounds on iCoff */
 256                         if (iCoff >= 63)
 257                                 iCoff = 63;
 258                         else if (iCoff <= -63)
 259                                 iCoff = -63;
 260
 261                         /* Negate iCoff if iqCorrNeg == 0 */
 262                         if (iqCorrNeg == 0x0)
 263                                 iCoff = -iCoff;
 264
 265                         /* Force bounds on qCoff */
 266                         if (qCoff >= 63)
 267                                 qCoff = 63;
 268                         else if (qCoff <= -63)
 269                                 qCoff = -63;
 270
 271                         iCoff = iCoff & 0x7f;
 272                         qCoff = qCoff & 0x7f;
 273
 274                         ath_dbg(common, CALIBRATE,
 275                                 "Chn %d : iCoff = 0x%x  qCoff = 0x%x\n",
 276                                 i, iCoff, qCoff);
 277                         ath_dbg(common, CALIBRATE,
 278                                 "Register offset (0x%04x) before update = 0x%x\n",
 279                                 offset_array[i],
 280                                 REG_READ(ah, offset_array[i]));
 281
 282                         REG_RMW_FIELD(ah, offset_array[i],
 283                                       AR_PHY_RX_IQCAL_CORR_IQCORR_Q_I_COFF,
 284                                       iCoff);
 285                         REG_RMW_FIELD(ah, offset_array[i],
 286                                       AR_PHY_RX_IQCAL_CORR_IQCORR_Q_Q_COFF,
 287                                       qCoff);
 288                         ath_dbg(common, CALIBRATE,
 289                                 "Register offset (0x%04x) QI COFF (bitfields 0x%08x) after update = 0x%x\n",
 290                                 offset_array[i],
 291                                 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_I_COFF,
 292                                 REG_READ(ah, offset_array[i]));
 293                         ath_dbg(common, CALIBRATE,
 294                                 "Register offset (0x%04x) QQ COFF (bitfields 0x%08x) after update = 0x%x\n",
 295                                 offset_array[i],
 296                                 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_Q_COFF,
 297                                 REG_READ(ah, offset_array[i]));
 298
 299                         ath_dbg(common, CALIBRATE,
 300                                 "IQ Cal and Correction done for Chain %d\n", i);
 301                 }
 302         }
 303
 304         REG_SET_BIT(ah, AR_PHY_RX_IQCAL_CORR_B0,
 305                     AR_PHY_RX_IQCAL_CORR_IQCORR_ENABLE);
 306         ath_dbg(common, CALIBRATE,
 307                 "IQ Cal and Correction (offset 0x%04x) enabled (bit position 0x%08x). New Value 0x%08x\n",
 308                 (unsigned) (AR_PHY_RX_IQCAL_CORR_B0),
 309                 AR_PHY_RX_IQCAL_CORR_IQCORR_ENABLE,
 310                 REG_READ(ah, AR_PHY_RX_IQCAL_CORR_B0));
 311 }
 312
 313 static const struct ath9k_percal_data iq_cal_single_sample = {
 314         IQ_MISMATCH_CAL,
 315         MIN_CAL_SAMPLES,
 316         PER_MAX_LOG_COUNT,
 317         ar9003_hw_iqcal_collect,
 318         ar9003_hw_iqcalibrate
 319 };
 320
 321 static void ar9003_hw_init_cal_settings(struct ath_hw *ah)
 322 {
 323         ah->iq_caldata.calData = &iq_cal_single_sample;
 324 }
 325
 326 /*
 327  * solve 4x4 linear equation used in loopback iq cal.
 328  */
 329 static bool ar9003_hw_solve_iq_cal(struct ath_hw *ah,
 330                                    s32 sin_2phi_1,
 331                                    s32 cos_2phi_1,
 332                                    s32 sin_2phi_2,
 333                                    s32 cos_2phi_2,
 334                                    s32 mag_a0_d0,
 335                                    s32 phs_a0_d0,
 336                                    s32 mag_a1_d0,
 337                                    s32 phs_a1_d0,
 338                                    s32 solved_eq[])
 339 {
 340         s32 f1 = cos_2phi_1 - cos_2phi_2,
 341             f3 = sin_2phi_1 - sin_2phi_2,
 342             f2;
 343         s32 mag_tx, phs_tx, mag_rx, phs_rx;
 344         const s32 result_shift = 1 << 15;
 345         struct ath_common *common = ath9k_hw_common(ah);
 346
 347         f2 = (f1 * f1 + f3 * f3) / result_shift;
 348
 349         if (!f2) {
 350                 ath_dbg(common, CALIBRATE, "Divide by 0\n");
 351                 return false;
 352         }
 353
 354         /* mag mismatch, tx */
 355         mag_tx = f1 * (mag_a0_d0  - mag_a1_d0) + f3 * (phs_a0_d0 - phs_a1_d0);
 356         /* phs mismatch, tx */
 357         phs_tx = f3 * (-mag_a0_d0 + mag_a1_d0) + f1 * (phs_a0_d0 - phs_a1_d0);
 358
 359         mag_tx = (mag_tx / f2);
 360         phs_tx = (phs_tx / f2);
 361
 362         /* mag mismatch, rx */
 363         mag_rx = mag_a0_d0 - (cos_2phi_1 * mag_tx + sin_2phi_1 * phs_tx) /
 364                  result_shift;
 365         /* phs mismatch, rx */
 366         phs_rx = phs_a0_d0 + (sin_2phi_1 * mag_tx - cos_2phi_1 * phs_tx) /
 367                  result_shift;
 368
 369         solved_eq[0] = mag_tx;
 370         solved_eq[1] = phs_tx;
 371         solved_eq[2] = mag_rx;
 372         solved_eq[3] = phs_rx;
 373
 374         return true;
 375 }
 376
 377 static s32 ar9003_hw_find_mag_approx(struct ath_hw *ah, s32 in_re, s32 in_im)
 378 {
 379         s32 abs_i = abs(in_re),
 380             abs_q = abs(in_im),
 381             max_abs, min_abs;
 382
 383         if (abs_i > abs_q) {
 384                 max_abs = abs_i;
 385                 min_abs = abs_q;
 386         } else {
 387                 max_abs = abs_q;
 388                 min_abs = abs_i;
 389         }
 390
 391         return max_abs - (max_abs / 32) + (min_abs / 8) + (min_abs / 4);
 392 }
 393
 394 #define DELPT 32
 395
 396 static bool ar9003_hw_calc_iq_corr(struct ath_hw *ah,
 397                                    s32 chain_idx,
 398                                    const s32 iq_res[],
 399                                    s32 iqc_coeff[])
 400 {
 401         s32 i2_m_q2_a0_d0, i2_p_q2_a0_d0, iq_corr_a0_d0,
 402             i2_m_q2_a0_d1, i2_p_q2_a0_d1, iq_corr_a0_d1,
 403             i2_m_q2_a1_d0, i2_p_q2_a1_d0, iq_corr_a1_d0,
 404             i2_m_q2_a1_d1, i2_p_q2_a1_d1, iq_corr_a1_d1;
 405         s32 mag_a0_d0, mag_a1_d0, mag_a0_d1, mag_a1_d1,
 406             phs_a0_d0, phs_a1_d0, phs_a0_d1, phs_a1_d1,
 407             sin_2phi_1, cos_2phi_1,
 408             sin_2phi_2, cos_2phi_2;
 409         s32 mag_tx, phs_tx, mag_rx, phs_rx;
 410         s32 solved_eq[4], mag_corr_tx, phs_corr_tx, mag_corr_rx, phs_corr_rx,
 411             q_q_coff, q_i_coff;
 412         const s32 res_scale = 1 << 15;
 413         const s32 delpt_shift = 1 << 8;
 414         s32 mag1, mag2;
 415         struct ath_common *common = ath9k_hw_common(ah);
 416
 417         i2_m_q2_a0_d0 = iq_res[0] & 0xfff;
 418         i2_p_q2_a0_d0 = (iq_res[0] >> 12) & 0xfff;
 419         iq_corr_a0_d0 = ((iq_res[0] >> 24) & 0xff) + ((iq_res[1] & 0xf) << 8);
 420
 421         if (i2_m_q2_a0_d0 > 0x800)
 422                 i2_m_q2_a0_d0 = -((0xfff - i2_m_q2_a0_d0) + 1);
 423
 424         if (i2_p_q2_a0_d0 > 0x800)
 425                 i2_p_q2_a0_d0 = -((0xfff - i2_p_q2_a0_d0) + 1);
 426
 427         if (iq_corr_a0_d0 > 0x800)
 428                 iq_corr_a0_d0 = -((0xfff - iq_corr_a0_d0) + 1);
 429
 430         i2_m_q2_a0_d1 = (iq_res[1] >> 4) & 0xfff;
 431         i2_p_q2_a0_d1 = (iq_res[2] & 0xfff);
 432         iq_corr_a0_d1 = (iq_res[2] >> 12) & 0xfff;
 433
 434         if (i2_m_q2_a0_d1 > 0x800)
 435                 i2_m_q2_a0_d1 = -((0xfff - i2_m_q2_a0_d1) + 1);
 436
 437         if (i2_p_q2_a0_d1 > 0x800)
 438                 i2_p_q2_a0_d1 = -((0xfff - i2_p_q2_a0_d1) + 1);
 439
 440         if (iq_corr_a0_d1 > 0x800)
 441                 iq_corr_a0_d1 = -((0xfff - iq_corr_a0_d1) + 1);
 442
 443         i2_m_q2_a1_d0 = ((iq_res[2] >> 24) & 0xff) + ((iq_res[3] & 0xf) << 8);
 444         i2_p_q2_a1_d0 = (iq_res[3] >> 4) & 0xfff;
 445         iq_corr_a1_d0 = iq_res[4] & 0xfff;
 446
 447         if (i2_m_q2_a1_d0 > 0x800)
 448                 i2_m_q2_a1_d0 = -((0xfff - i2_m_q2_a1_d0) + 1);
 449
 450         if (i2_p_q2_a1_d0 > 0x800)
 451                 i2_p_q2_a1_d0 = -((0xfff - i2_p_q2_a1_d0) + 1);
 452
 453         if (iq_corr_a1_d0 > 0x800)
 454                 iq_corr_a1_d0 = -((0xfff - iq_corr_a1_d0) + 1);
 455
 456         i2_m_q2_a1_d1 = (iq_res[4] >> 12) & 0xfff;
 457         i2_p_q2_a1_d1 = ((iq_res[4] >> 24) & 0xff) + ((iq_res[5] & 0xf) << 8);
 458         iq_corr_a1_d1 = (iq_res[5] >> 4) & 0xfff;
 459
 460         if (i2_m_q2_a1_d1 > 0x800)
 461                 i2_m_q2_a1_d1 = -((0xfff - i2_m_q2_a1_d1) + 1);
 462
 463         if (i2_p_q2_a1_d1 > 0x800)
 464                 i2_p_q2_a1_d1 = -((0xfff - i2_p_q2_a1_d1) + 1);
 465
 466         if (iq_corr_a1_d1 > 0x800)
 467                 iq_corr_a1_d1 = -((0xfff - iq_corr_a1_d1) + 1);
 468
 469         if ((i2_p_q2_a0_d0 == 0) || (i2_p_q2_a0_d1 == 0) ||
 470             (i2_p_q2_a1_d0 == 0) || (i2_p_q2_a1_d1 == 0)) {
 471                 ath_dbg(common, CALIBRATE,
 472                         "Divide by 0:\n"
 473                         "a0_d0=%d\n"
 474                         "a0_d1=%d\n"
 475                         "a2_d0=%d\n"
 476                         "a1_d1=%d\n",
 477                         i2_p_q2_a0_d0, i2_p_q2_a0_d1,
 478                         i2_p_q2_a1_d0, i2_p_q2_a1_d1);
 479                 return false;
 480         }
 481
 482         mag_a0_d0 = (i2_m_q2_a0_d0 * res_scale) / i2_p_q2_a0_d0;
 483         phs_a0_d0 = (iq_corr_a0_d0 * res_scale) / i2_p_q2_a0_d0;
 484
 485         mag_a0_d1 = (i2_m_q2_a0_d1 * res_scale) / i2_p_q2_a0_d1;
 486         phs_a0_d1 = (iq_corr_a0_d1 * res_scale) / i2_p_q2_a0_d1;
 487
 488         mag_a1_d0 = (i2_m_q2_a1_d0 * res_scale) / i2_p_q2_a1_d0;
 489         phs_a1_d0 = (iq_corr_a1_d0 * res_scale) / i2_p_q2_a1_d0;
 490
 491         mag_a1_d1 = (i2_m_q2_a1_d1 * res_scale) / i2_p_q2_a1_d1;
 492         phs_a1_d1 = (iq_corr_a1_d1 * res_scale) / i2_p_q2_a1_d1;
 493
 494         /* w/o analog phase shift */
 495         sin_2phi_1 = (((mag_a0_d0 - mag_a0_d1) * delpt_shift) / DELPT);
 496         /* w/o analog phase shift */
 497         cos_2phi_1 = (((phs_a0_d1 - phs_a0_d0) * delpt_shift) / DELPT);
 498         /* w/  analog phase shift */
 499         sin_2phi_2 = (((mag_a1_d0 - mag_a1_d1) * delpt_shift) / DELPT);
 500         /* w/  analog phase shift */
 501         cos_2phi_2 = (((phs_a1_d1 - phs_a1_d0) * delpt_shift) / DELPT);
 502
 503         /*
 504          * force sin^2 + cos^2 = 1;
 505          * find magnitude by approximation
 506          */
 507         mag1 = ar9003_hw_find_mag_approx(ah, cos_2phi_1, sin_2phi_1);
 508         mag2 = ar9003_hw_find_mag_approx(ah, cos_2phi_2, sin_2phi_2);
 509
 510         if ((mag1 == 0) || (mag2 == 0)) {
 511                 ath_dbg(common, CALIBRATE, "Divide by 0: mag1=%d, mag2=%d\n",
 512                         mag1, mag2);
 513                 return false;
 514         }
 515
 516         /* normalization sin and cos by mag */
 517         sin_2phi_1 = (sin_2phi_1 * res_scale / mag1);
 518         cos_2phi_1 = (cos_2phi_1 * res_scale / mag1);
 519         sin_2phi_2 = (sin_2phi_2 * res_scale / mag2);
 520         cos_2phi_2 = (cos_2phi_2 * res_scale / mag2);
 521
 522         /* calculate IQ mismatch */
 523         if (!ar9003_hw_solve_iq_cal(ah,
 524                              sin_2phi_1, cos_2phi_1,
 525                              sin_2phi_2, cos_2phi_2,
 526                              mag_a0_d0, phs_a0_d0,
 527                              mag_a1_d0,
 528                              phs_a1_d0, solved_eq)) {
 529                 ath_dbg(common, CALIBRATE,
 530                         "Call to ar9003_hw_solve_iq_cal() failed\n");
 531                 return false;
 532         }
 533
 534         mag_tx = solved_eq[0];
 535         phs_tx = solved_eq[1];
 536         mag_rx = solved_eq[2];
 537         phs_rx = solved_eq[3];
 538
 539         ath_dbg(common, CALIBRATE,
 540                 "chain %d: mag mismatch=%d phase mismatch=%d\n",
 541                 chain_idx, mag_tx/res_scale, phs_tx/res_scale);
 542
 543         if (res_scale == mag_tx) {
 544                 ath_dbg(common, CALIBRATE,
 545                         "Divide by 0: mag_tx=%d, res_scale=%d\n",
 546                         mag_tx, res_scale);
 547                 return false;
 548         }
 549
 550         /* calculate and quantize Tx IQ correction factor */
 551         mag_corr_tx = (mag_tx * res_scale) / (res_scale - mag_tx);
 552         phs_corr_tx = -phs_tx;
 553
 554         q_q_coff = (mag_corr_tx * 128 / res_scale);
 555         q_i_coff = (phs_corr_tx * 256 / res_scale);
 556
 557         ath_dbg(common, CALIBRATE, "tx chain %d: mag corr=%d  phase corr=%d\n",
 558                 chain_idx, q_q_coff, q_i_coff);
 559
 560         if (q_i_coff < -63)
 561                 q_i_coff = -63;
 562         if (q_i_coff > 63)
 563                 q_i_coff = 63;
 564         if (q_q_coff < -63)
 565                 q_q_coff = -63;
 566         if (q_q_coff > 63)
 567                 q_q_coff = 63;
 568
 569         iqc_coeff[0] = (q_q_coff * 128) + q_i_coff;
 570
 571         ath_dbg(common, CALIBRATE, "tx chain %d: iq corr coeff=%x\n",
 572                 chain_idx, iqc_coeff[0]);
 573
 574         if (-mag_rx == res_scale) {
 575                 ath_dbg(common, CALIBRATE,
 576                         "Divide by 0: mag_rx=%d, res_scale=%d\n",
 577                         mag_rx, res_scale);
 578                 return false;
 579         }
 580
 581         /* calculate and quantize Rx IQ correction factors */
 582         mag_corr_rx = (-mag_rx * res_scale) / (res_scale + mag_rx);
 583         phs_corr_rx = -phs_rx;
 584
 585         q_q_coff = (mag_corr_rx * 128 / res_scale);
 586         q_i_coff = (phs_corr_rx * 256 / res_scale);
 587
 588         ath_dbg(common, CALIBRATE, "rx chain %d: mag corr=%d  phase corr=%d\n",
 589                 chain_idx, q_q_coff, q_i_coff);
 590
 591         if (q_i_coff < -63)
 592                 q_i_coff = -63;
 593         if (q_i_coff > 63)
 594                 q_i_coff = 63;
 595         if (q_q_coff < -63)
 596                 q_q_coff = -63;
 597         if (q_q_coff > 63)
 598                 q_q_coff = 63;
 599
 600         iqc_coeff[1] = (q_q_coff * 128) + q_i_coff;
 601
 602         ath_dbg(common, CALIBRATE, "rx chain %d: iq corr coeff=%x\n",
 603                 chain_idx, iqc_coeff[1]);
 604
 605         return true;
 606 }
 607
 608 static void ar9003_hw_detect_outlier(int *mp_coeff, int nmeasurement,
 609                                      int max_delta)
 610 {
 611         int mp_max = -64, max_idx = 0;
 612         int mp_min = 63, min_idx = 0;
 613         int mp_avg = 0, i, outlier_idx = 0, mp_count = 0;
 614
 615         /* find min/max mismatch across all calibrated gains */
 616         for (i = 0; i < nmeasurement; i++) {
 617                 if (mp_coeff[i] > mp_max) {
 618                         mp_max = mp_coeff[i];
 619                         max_idx = i;
 620                 } else if (mp_coeff[i] < mp_min) {
 621                         mp_min = mp_coeff[i];
 622                         min_idx = i;
 623                 }
 624         }
 625
 626         /* find average (exclude max abs value) */
 627         for (i = 0; i < nmeasurement; i++) {
 628                 if ((abs(mp_coeff[i]) < abs(mp_max)) ||
 629                     (abs(mp_coeff[i]) < abs(mp_min))) {
 630                         mp_avg += mp_coeff[i];
 631                         mp_count++;
 632                 }
 633         }
 634
 635         /*
 636          * finding mean magnitude/phase if possible, otherwise
 637          * just use the last value as the mean
 638          */
 639         if (mp_count)
 640                 mp_avg /= mp_count;
 641         else
 642                 mp_avg = mp_coeff[nmeasurement - 1];
 643
 644         /* detect outlier */
 645         if (abs(mp_max - mp_min) > max_delta) {
 646                 if (abs(mp_max - mp_avg) > abs(mp_min - mp_avg))
 647                         outlier_idx = max_idx;
 648                 else
 649                         outlier_idx = min_idx;
 650
 651                 mp_coeff[outlier_idx] = mp_avg;
 652         }
 653 }
 654
 655 static void ar9003_hw_tx_iqcal_load_avg_2_passes(struct ath_hw *ah,
 656                                                  u8 num_chains,
 657                                                  struct coeff *coeff,
 658                                                  bool is_reusable)
 659 {
 660         int i, im, nmeasurement;
 661         u32 tx_corr_coeff[MAX_MEASUREMENT][AR9300_MAX_CHAINS];
 662         struct ath9k_hw_cal_data *caldata = ah->caldata;
 663
 664         memset(tx_corr_coeff, 0, sizeof(tx_corr_coeff));
 665         for (i = 0; i < MAX_MEASUREMENT / 2; i++) {
 666                 tx_corr_coeff[i * 2][0] = tx_corr_coeff[(i * 2) + 1][0] =
 667                                         AR_PHY_TX_IQCAL_CORR_COEFF_B0(i);
 668                 if (!AR_SREV_9485(ah)) {
 669                         tx_corr_coeff[i * 2][1] =
 670                         tx_corr_coeff[(i * 2) + 1][1] =
 671                                         AR_PHY_TX_IQCAL_CORR_COEFF_B1(i);
 672
 673                         tx_corr_coeff[i * 2][2] =
 674                         tx_corr_coeff[(i * 2) + 1][2] =
 675                                         AR_PHY_TX_IQCAL_CORR_COEFF_B2(i);
 676                 }
 677         }
 678
 679         /* Load the average of 2 passes */
 680         for (i = 0; i < num_chains; i++) {
 681                 nmeasurement = REG_READ_FIELD(ah,
 682                                 AR_PHY_TX_IQCAL_STATUS_B0,
 683                                 AR_PHY_CALIBRATED_GAINS_0);
 684
 685                 if (nmeasurement > MAX_MEASUREMENT)
 686                         nmeasurement = MAX_MEASUREMENT;
 687
 688                 /* detect outlier only if nmeasurement > 1 */
 689                 if (nmeasurement > 1) {
 690                         /* Detect magnitude outlier */
 691                         ar9003_hw_detect_outlier(coeff->mag_coeff[i],
 692                                         nmeasurement, MAX_MAG_DELTA);
 693
 694                         /* Detect phase outlier */
 695                         ar9003_hw_detect_outlier(coeff->phs_coeff[i],
 696                                         nmeasurement, MAX_PHS_DELTA);
 697                 }
 698
 699                 for (im = 0; im < nmeasurement; im++) {
 700
 701                         coeff->iqc_coeff[0] = (coeff->mag_coeff[i][im] & 0x7f) |
 702                                 ((coeff->phs_coeff[i][im] & 0x7f) << 7);
 703
 704                         if ((im % 2) == 0)
 705                                 REG_RMW_FIELD(ah, tx_corr_coeff[im][i],
 706                                         AR_PHY_TX_IQCAL_CORR_COEFF_00_COEFF_TABLE,
 707                                         coeff->iqc_coeff[0]);
 708                         else
 709                                 REG_RMW_FIELD(ah, tx_corr_coeff[im][i],
 710                                         AR_PHY_TX_IQCAL_CORR_COEFF_01_COEFF_TABLE,
 711                                         coeff->iqc_coeff[0]);
 712
 713                         if (caldata)
 714                                 caldata->tx_corr_coeff[im][i] =
 715                                         coeff->iqc_coeff[0];
 716                 }
 717                 if (caldata)
 718                         caldata->num_measures[i] = nmeasurement;
 719         }
 720
 721         REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_3,
 722                       AR_PHY_TX_IQCAL_CONTROL_3_IQCORR_EN, 0x1);
 723         REG_RMW_FIELD(ah, AR_PHY_RX_IQCAL_CORR_B0,
 724                       AR_PHY_RX_IQCAL_CORR_B0_LOOPBACK_IQCORR_EN, 0x1);
 725
 726         if (caldata)
 727                 caldata->done_txiqcal_once = is_reusable;
 728
 729         return;
 730 }
 731
 732 static bool ar9003_hw_tx_iq_cal_run(struct ath_hw *ah)
 733 {
 734         struct ath_common *common = ath9k_hw_common(ah);
 735         u8 tx_gain_forced;
 736
 737         tx_gain_forced = REG_READ_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 738                                         AR_PHY_TXGAIN_FORCE);
 739         if (tx_gain_forced)
 740                 REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 741                               AR_PHY_TXGAIN_FORCE, 0);
 742
 743         REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_START,
 744                       AR_PHY_TX_IQCAL_START_DO_CAL, 1);
 745
 746         if (!ath9k_hw_wait(ah, AR_PHY_TX_IQCAL_START,
 747                         AR_PHY_TX_IQCAL_START_DO_CAL, 0,
 748                         AH_WAIT_TIMEOUT)) {
 749                 ath_dbg(common, CALIBRATE, "Tx IQ Cal is not completed\n");
 750                 return false;
 751         }
 752         return true;
 753 }
 754
 755 static void ar9003_hw_tx_iq_cal_post_proc(struct ath_hw *ah, bool is_reusable)
 756 {
 757         struct ath_common *common = ath9k_hw_common(ah);
 758         const u32 txiqcal_status[AR9300_MAX_CHAINS] = {
 759                 AR_PHY_TX_IQCAL_STATUS_B0,
 760                 AR_PHY_TX_IQCAL_STATUS_B1,
 761                 AR_PHY_TX_IQCAL_STATUS_B2,
 762         };
 763         const u_int32_t chan_info_tab[] = {
 764                 AR_PHY_CHAN_INFO_TAB_0,
 765                 AR_PHY_CHAN_INFO_TAB_1,
 766                 AR_PHY_CHAN_INFO_TAB_2,
 767         };
 768         struct coeff coeff;
 769         s32 iq_res[6];
 770         u8 num_chains = 0;
 771         int i, im, j;
 772         int nmeasurement;
 773
 774         for (i = 0; i < AR9300_MAX_CHAINS; i++) {
 775                 if (ah->txchainmask & (1 << i))
 776                         num_chains++;
 777         }
 778
 779         for (i = 0; i < num_chains; i++) {
 780                 nmeasurement = REG_READ_FIELD(ah,
 781                                 AR_PHY_TX_IQCAL_STATUS_B0,
 782                                 AR_PHY_CALIBRATED_GAINS_0);
 783                 if (nmeasurement > MAX_MEASUREMENT)
 784                         nmeasurement = MAX_MEASUREMENT;
 785
 786                 for (im = 0; im < nmeasurement; im++) {
 787                         ath_dbg(common, CALIBRATE,
 788                                 "Doing Tx IQ Cal for chain %d\n", i);
 789
 790                         if (REG_READ(ah, txiqcal_status[i]) &
 791                                         AR_PHY_TX_IQCAL_STATUS_FAILED) {
 792                                 ath_dbg(common, CALIBRATE,
 793                                         "Tx IQ Cal failed for chain %d\n", i);
 794                                 goto tx_iqcal_fail;
 795                         }
 796
 797                         for (j = 0; j < 3; j++) {
 798                                 u32 idx = 2 * j, offset = 4 * (3 * im + j);
 799
 800                                 REG_RMW_FIELD(ah,
 801                                                 AR_PHY_CHAN_INFO_MEMORY,
 802                                                 AR_PHY_CHAN_INFO_TAB_S2_READ,
 803                                                 0);
 804
 805                                 /* 32 bits */
 806                                 iq_res[idx] = REG_READ(ah,
 807                                                 chan_info_tab[i] +
 808                                                 offset);
 809
 810                                 REG_RMW_FIELD(ah,
 811                                                 AR_PHY_CHAN_INFO_MEMORY,
 812                                                 AR_PHY_CHAN_INFO_TAB_S2_READ,
 813                                                 1);
 814
 815                                 /* 16 bits */
 816                                 iq_res[idx + 1] = 0xffff & REG_READ(ah,
 817                                                 chan_info_tab[i] + offset);
 818
 819                                 ath_dbg(common, CALIBRATE,
 820                                         "IQ_RES[%d]=0x%x IQ_RES[%d]=0x%x\n",
 821                                         idx, iq_res[idx], idx + 1,
 822                                         iq_res[idx + 1]);
 823                         }
 824
 825                         if (!ar9003_hw_calc_iq_corr(ah, i, iq_res,
 826                                                 coeff.iqc_coeff)) {
 827                                 ath_dbg(common, CALIBRATE,
 828                                         "Failed in calculation of IQ correction\n");
 829                                 goto tx_iqcal_fail;
 830                         }
 831
 832                         coeff.mag_coeff[i][im] = coeff.iqc_coeff[0] & 0x7f;
 833                         coeff.phs_coeff[i][im] =
 834                                 (coeff.iqc_coeff[0] >> 7) & 0x7f;
 835
 836                         if (coeff.mag_coeff[i][im] > 63)
 837                                 coeff.mag_coeff[i][im] -= 128;
 838                         if (coeff.phs_coeff[i][im] > 63)
 839                                 coeff.phs_coeff[i][im] -= 128;
 840                 }
 841         }
 842         ar9003_hw_tx_iqcal_load_avg_2_passes(ah, num_chains,
 843                                              &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 bool ar9003_hw_rtt_restore(struct ath_hw *ah, struct ath9k_channel *chan)
 896 {
 897         struct ath9k_rtt_hist *hist;
 898         u32 *table;
 899         int i;
 900         bool restore;
 901
 902         if (!ah->caldata)
 903                 return false;
 904
 905         hist = &ah->caldata->rtt_hist;
 906         if (!hist->num_readings)
 907                 return false;
 908
 909         ar9003_hw_rtt_enable(ah);
 910         ar9003_hw_rtt_set_mask(ah, 0x00);
 911         for (i = 0; i < AR9300_MAX_CHAINS; i++) {
 912                 if (!(ah->rxchainmask & (1 << i)))
 913                         continue;
 914                 table = &hist->table[i][hist->num_readings][0];
 915                 ar9003_hw_rtt_load_hist(ah, i, table);
 916         }
 917         restore = ar9003_hw_rtt_force_restore(ah);
 918         ar9003_hw_rtt_disable(ah);
 919
 920         return restore;
 921 }
 922
 923 static bool ar9003_hw_init_cal(struct ath_hw *ah,
 924                                struct ath9k_channel *chan)
 925 {
 926         struct ath_common *common = ath9k_hw_common(ah);
 927         struct ath9k_hw_cal_data *caldata = ah->caldata;
 928         bool txiqcal_done = false, txclcal_done = false;
 929         bool is_reusable = true, status = true;
 930         bool run_rtt_cal = false, run_agc_cal;
 931         bool rtt = !!(ah->caps.hw_caps & ATH9K_HW_CAP_RTT);
 932         bool mci = !!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI);
 933         u32 agc_ctrl = 0, agc_supp_cals = AR_PHY_AGC_CONTROL_OFFSET_CAL |
 934                                           AR_PHY_AGC_CONTROL_FLTR_CAL   |
 935                                           AR_PHY_AGC_CONTROL_PKDET_CAL;
 936         int i, j;
 937         u32 cl_idx[AR9300_MAX_CHAINS] = { AR_PHY_CL_TAB_0,
 938                                           AR_PHY_CL_TAB_1,
 939                                           AR_PHY_CL_TAB_2 };
 940
 941         if (rtt) {
 942                 if (!ar9003_hw_rtt_restore(ah, chan))
 943                         run_rtt_cal = true;
 944
 945                 ath_dbg(common, CALIBRATE, "RTT restore %s\n",
 946                         run_rtt_cal ? "failed" : "succeed");
 947         }
 948         run_agc_cal = run_rtt_cal;
 949
 950         if (run_rtt_cal) {
 951                 ar9003_hw_rtt_enable(ah);
 952                 ar9003_hw_rtt_set_mask(ah, 0x00);
 953                 ar9003_hw_rtt_clear_hist(ah);
 954         }
 955
 956         if (rtt && !run_rtt_cal) {
 957                 agc_ctrl = REG_READ(ah, AR_PHY_AGC_CONTROL);
 958                 agc_supp_cals &= agc_ctrl;
 959                 agc_ctrl &= ~(AR_PHY_AGC_CONTROL_OFFSET_CAL |
 960                              AR_PHY_AGC_CONTROL_FLTR_CAL |
 961                              AR_PHY_AGC_CONTROL_PKDET_CAL);
 962                 REG_WRITE(ah, AR_PHY_AGC_CONTROL, agc_ctrl);
 963         }
 964
 965         if (ah->enabled_cals & TX_CL_CAL) {
 966                 if (caldata && caldata->done_txclcal_once)
 967                         REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL,
 968                                     AR_PHY_CL_CAL_ENABLE);
 969                 else {
 970                         REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL,
 971                                     AR_PHY_CL_CAL_ENABLE);
 972                         run_agc_cal = true;
 973                 }
 974         }
 975
 976         if (!(ah->enabled_cals & TX_IQ_CAL))
 977                 goto skip_tx_iqcal;
 978
 979         /* Do Tx IQ Calibration */
 980         REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_1,
 981                       AR_PHY_TX_IQCAL_CONTROL_1_IQCORR_I_Q_COFF_DELPT,
 982                       DELPT);
 983
 984         /*
 985          * For AR9485 or later chips, TxIQ cal runs as part of
 986          * AGC calibration
 987          */
 988         if (ah->enabled_cals & TX_IQ_ON_AGC_CAL) {
 989                 if (caldata && !caldata->done_txiqcal_once)
 990                         REG_SET_BIT(ah, AR_PHY_TX_IQCAL_CONTROL_0,
 991                                     AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL);
 992                 else
 993                         REG_CLR_BIT(ah, AR_PHY_TX_IQCAL_CONTROL_0,
 994                                     AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL);
 995                 txiqcal_done = run_agc_cal = true;
 996                 goto skip_tx_iqcal;
 997         } else if (caldata && !caldata->done_txiqcal_once)
 998                 run_agc_cal = true;
 999
1000         if (mci && IS_CHAN_2GHZ(chan) && run_agc_cal)
1001                 ar9003_mci_init_cal_req(ah, &is_reusable);
1002
1003         if (!(IS_CHAN_HALF_RATE(chan) || IS_CHAN_QUARTER_RATE(chan))) {
1004                 txiqcal_done = ar9003_hw_tx_iq_cal_run(ah);
1005                 REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_DIS);
1006                 udelay(5);
1007                 REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN);
1008         }
1009
1010 skip_tx_iqcal:
1011         if (run_agc_cal || !(ah->ah_flags & AH_FASTCC)) {
1012                 /* Calibrate the AGC */
1013                 REG_WRITE(ah, AR_PHY_AGC_CONTROL,
1014                           REG_READ(ah, AR_PHY_AGC_CONTROL) |
1015                           AR_PHY_AGC_CONTROL_CAL);
1016
1017                 /* Poll for offset calibration complete */
1018                 status = ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL,
1019                                        AR_PHY_AGC_CONTROL_CAL,
1020                                        0, AH_WAIT_TIMEOUT);
1021         }
1022
1023         if (mci && IS_CHAN_2GHZ(chan) && run_agc_cal)
1024                 ar9003_mci_init_cal_done(ah);
1025
1026         if (rtt && !run_rtt_cal) {
1027                 agc_ctrl |= agc_supp_cals;
1028                 REG_WRITE(ah, AR_PHY_AGC_CONTROL, agc_ctrl);
1029         }
1030
1031         if (!status) {
1032                 if (run_rtt_cal)
1033                         ar9003_hw_rtt_disable(ah);
1034
1035                 ath_dbg(common, CALIBRATE,
1036                         "offset calibration failed to complete in 1ms; noisy environment?\n");
1037                 return false;
1038         }
1039
1040         if (txiqcal_done)
1041                 ar9003_hw_tx_iq_cal_post_proc(ah, is_reusable);
1042         else if (caldata && caldata->done_txiqcal_once)
1043                 ar9003_hw_tx_iq_cal_reload(ah);
1044
1045 #define CL_TAB_ENTRY(reg_base)  (reg_base + (4 * j))
1046         if (caldata && (ah->enabled_cals & TX_CL_CAL)) {
1047                 txclcal_done = !!(REG_READ(ah, AR_PHY_AGC_CONTROL) &
1048                                            AR_PHY_AGC_CONTROL_CLC_SUCCESS);
1049                 if (caldata->done_txclcal_once) {
1050                         for (i = 0; i < AR9300_MAX_CHAINS; i++) {
1051                                 if (!(ah->txchainmask & (1 << i)))
1052                                         continue;
1053                                 for (j = 0; j < MAX_CL_TAB_ENTRY; j++)
1054                                         REG_WRITE(ah, CL_TAB_ENTRY(cl_idx[i]),
1055                                                   caldata->tx_clcal[i][j]);
1056                         }
1057                 } else if (is_reusable && txclcal_done) {
1058                         for (i = 0; i < AR9300_MAX_CHAINS; i++) {
1059                                 if (!(ah->txchainmask & (1 << i)))
1060                                         continue;
1061                                 for (j = 0; j < MAX_CL_TAB_ENTRY; j++)
1062                                         caldata->tx_clcal[i][j] =
1063                                                 REG_READ(ah,
1064                                                   CL_TAB_ENTRY(cl_idx[i]));
1065                         }
1066                         caldata->done_txclcal_once = true;
1067                 }
1068         }
1069 #undef CL_TAB_ENTRY
1070
1071         if (run_rtt_cal && caldata) {
1072                 struct ath9k_rtt_hist *hist = &caldata->rtt_hist;
1073                 if (is_reusable && (hist->num_readings < RTT_HIST_MAX)) {
1074                         u32 *table;
1075
1076                         hist->num_readings++;
1077                         for (i = 0; i < AR9300_MAX_CHAINS; i++) {
1078                                 if (!(ah->rxchainmask & (1 << i)))
1079                                         continue;
1080                                 table = &hist->table[i][hist->num_readings][0];
1081                                 ar9003_hw_rtt_fill_hist(ah, i, table);
1082                         }
1083                 }
1084
1085                 ar9003_hw_rtt_disable(ah);
1086         }
1087
1088         /* Initialize list pointers */
1089         ah->cal_list = ah->cal_list_last = ah->cal_list_curr = NULL;
1090         ah->supp_cals = IQ_MISMATCH_CAL;
1091
1092         if (ah->supp_cals & IQ_MISMATCH_CAL) {
1093                 INIT_CAL(&ah->iq_caldata);
1094                 INSERT_CAL(ah, &ah->iq_caldata);
1095                 ath_dbg(common, CALIBRATE, "enabling IQ Calibration\n");
1096         }
1097
1098         if (ah->supp_cals & TEMP_COMP_CAL) {
1099                 INIT_CAL(&ah->tempCompCalData);
1100                 INSERT_CAL(ah, &ah->tempCompCalData);
1101                 ath_dbg(common, CALIBRATE,
1102                         "enabling Temperature Compensation Calibration\n");
1103         }
1104
1105         /* Initialize current pointer to first element in list */
1106         ah->cal_list_curr = ah->cal_list;
1107
1108         if (ah->cal_list_curr)
1109                 ath9k_hw_reset_calibration(ah, ah->cal_list_curr);
1110
1111         if (caldata)
1112                 caldata->CalValid = 0;
1113
1114         return true;
1115 }
1116
1117 void ar9003_hw_attach_calib_ops(struct ath_hw *ah)
1118 {
1119         struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah);
1120         struct ath_hw_ops *ops = ath9k_hw_ops(ah);
1121
1122         priv_ops->init_cal_settings = ar9003_hw_init_cal_settings;
1123         priv_ops->init_cal = ar9003_hw_init_cal;
1124         priv_ops->setup_calibration = ar9003_hw_setup_calibration;
1125
1126         ops->calibrate = ar9003_hw_calibrate;
1127 }