kernel/drivers/net/wireless/ath/ath9k/ar9003_paprd.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 <linux/export.h>
  18 #include "hw.h"
  19 #include "ar9003_phy.h"
  20
  21 void ar9003_paprd_enable(struct ath_hw *ah, bool val)
  22 {
  23         struct ath9k_channel *chan = ah->curchan;
  24         struct ar9300_eeprom *eep = &ah->eeprom.ar9300_eep;
  25
  26         /*
  27          * 3 bits for modalHeader5G.papdRateMaskHt20
  28          * is used for sub-band disabling of PAPRD.
  29          * 5G band is divided into 3 sub-bands -- upper,
  30          * middle, lower.
  31          * if bit 30 of modalHeader5G.papdRateMaskHt20 is set
  32          * -- disable PAPRD for upper band 5GHz
  33          * if bit 29 of modalHeader5G.papdRateMaskHt20 is set
  34          * -- disable PAPRD for middle band 5GHz
  35          * if bit 28 of modalHeader5G.papdRateMaskHt20 is set
  36          * -- disable PAPRD for lower band 5GHz
  37          */
  38
  39         if (IS_CHAN_5GHZ(chan)) {
  40                 if (chan->channel >= UPPER_5G_SUB_BAND_START) {
  41                         if (le32_to_cpu(eep->modalHeader5G.papdRateMaskHt20)
  42                                                                   & BIT(30))
  43                                 val = false;
  44                 } else if (chan->channel >= MID_5G_SUB_BAND_START) {
  45                         if (le32_to_cpu(eep->modalHeader5G.papdRateMaskHt20)
  46                                                                   & BIT(29))
  47                                 val = false;
  48                 } else {
  49                         if (le32_to_cpu(eep->modalHeader5G.papdRateMaskHt20)
  50                                                                   & BIT(28))
  51                                 val = false;
  52                 }
  53         }
  54
  55         if (val) {
  56                 ah->paprd_table_write_done = true;
  57                 ath9k_hw_apply_txpower(ah, chan, false);
  58         }
  59
  60         REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL0_B0,
  61                       AR_PHY_PAPRD_CTRL0_PAPRD_ENABLE, !!val);
  62         if (ah->caps.tx_chainmask & BIT(1))
  63                 REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL0_B1,
  64                               AR_PHY_PAPRD_CTRL0_PAPRD_ENABLE, !!val);
  65         if (ah->caps.tx_chainmask & BIT(2))
  66                 REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL0_B2,
  67                               AR_PHY_PAPRD_CTRL0_PAPRD_ENABLE, !!val);
  68 }
  69 EXPORT_SYMBOL(ar9003_paprd_enable);
  70
  71 static int ar9003_get_training_power_2g(struct ath_hw *ah)
  72 {
  73         struct ath9k_channel *chan = ah->curchan;
  74         unsigned int power, scale, delta;
  75
  76         scale = ar9003_get_paprd_scale_factor(ah, chan);
  77
  78         if (AR_SREV_9330(ah) || AR_SREV_9340(ah) ||
  79             AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
  80                 power = ah->paprd_target_power + 2;
  81         } else if (AR_SREV_9485(ah)) {
  82                 power = 25;
  83         } else {
  84                 power = REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE5,
  85                                        AR_PHY_POWERTX_RATE5_POWERTXHT20_0);
  86
  87                 delta = abs((int) ah->paprd_target_power - (int) power);
  88                 if (delta > scale)
  89                         return -1;
  90
  91                 if (delta < 4)
  92                         power -= 4 - delta;
  93         }
  94
  95         return power;
  96 }
  97
  98 static int ar9003_get_training_power_5g(struct ath_hw *ah)
  99 {
 100         struct ath_common *common = ath9k_hw_common(ah);
 101         struct ath9k_channel *chan = ah->curchan;
 102         unsigned int power, scale, delta;
 103
 104         scale = ar9003_get_paprd_scale_factor(ah, chan);
 105
 106         if (IS_CHAN_HT40(chan))
 107                 power = REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE8,
 108                         AR_PHY_POWERTX_RATE8_POWERTXHT40_5);
 109         else
 110                 power = REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE6,
 111                         AR_PHY_POWERTX_RATE6_POWERTXHT20_5);
 112
 113         power += scale;
 114         delta = abs((int) ah->paprd_target_power - (int) power);
 115         if (delta > scale)
 116                 return -1;
 117
 118         switch (get_streams(ah->txchainmask)) {
 119         case 1:
 120                 delta = 6;
 121                 break;
 122         case 2:
 123                 delta = 4;
 124                 break;
 125         case 3:
 126                 delta = 2;
 127                 break;
 128         default:
 129                 delta = 0;
 130                 ath_dbg(common, CALIBRATE, "Invalid tx-chainmask: %u\n",
 131                         ah->txchainmask);
 132         }
 133
 134         power += delta;
 135         return power;
 136 }
 137
 138 static int ar9003_paprd_setup_single_table(struct ath_hw *ah)
 139 {
 140         struct ath_common *common = ath9k_hw_common(ah);
 141         static const u32 ctrl0[3] = {
 142                 AR_PHY_PAPRD_CTRL0_B0,
 143                 AR_PHY_PAPRD_CTRL0_B1,
 144                 AR_PHY_PAPRD_CTRL0_B2
 145         };
 146         static const u32 ctrl1[3] = {
 147                 AR_PHY_PAPRD_CTRL1_B0,
 148                 AR_PHY_PAPRD_CTRL1_B1,
 149                 AR_PHY_PAPRD_CTRL1_B2
 150         };
 151         int training_power;
 152         int i, val;
 153         u32 am2pm_mask = ah->paprd_ratemask;
 154
 155         if (IS_CHAN_2GHZ(ah->curchan))
 156                 training_power = ar9003_get_training_power_2g(ah);
 157         else
 158                 training_power = ar9003_get_training_power_5g(ah);
 159
 160         ath_dbg(common, CALIBRATE, "Training power: %d, Target power: %d\n",
 161                 training_power, ah->paprd_target_power);
 162
 163         if (training_power < 0) {
 164                 ath_dbg(common, CALIBRATE,
 165                         "PAPRD target power delta out of range\n");
 166                 return -ERANGE;
 167         }
 168         ah->paprd_training_power = training_power;
 169
 170         if (AR_SREV_9330(ah))
 171                 am2pm_mask = 0;
 172
 173         REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2AM, AR_PHY_PAPRD_AM2AM_MASK,
 174                       ah->paprd_ratemask);
 175         REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2PM, AR_PHY_PAPRD_AM2PM_MASK,
 176                       am2pm_mask);
 177         REG_RMW_FIELD(ah, AR_PHY_PAPRD_HT40, AR_PHY_PAPRD_HT40_MASK,
 178                       ah->paprd_ratemask_ht40);
 179
 180         ath_dbg(common, CALIBRATE, "PAPRD HT20 mask: 0x%x, HT40 mask: 0x%x\n",
 181                 ah->paprd_ratemask, ah->paprd_ratemask_ht40);
 182
 183         for (i = 0; i < ah->caps.max_txchains; i++) {
 184                 REG_RMW_FIELD(ah, ctrl0[i],
 185                               AR_PHY_PAPRD_CTRL0_USE_SINGLE_TABLE_MASK, 1);
 186                 REG_RMW_FIELD(ah, ctrl1[i],
 187                               AR_PHY_PAPRD_CTRL1_ADAPTIVE_AM2PM_ENABLE, 1);
 188                 REG_RMW_FIELD(ah, ctrl1[i],
 189                               AR_PHY_PAPRD_CTRL1_ADAPTIVE_AM2AM_ENABLE, 1);
 190                 REG_RMW_FIELD(ah, ctrl1[i],
 191                               AR_PHY_PAPRD_CTRL1_ADAPTIVE_SCALING_ENA, 0);
 192                 REG_RMW_FIELD(ah, ctrl1[i],
 193                               AR_PHY_PAPRD_CTRL1_PA_GAIN_SCALE_FACT_MASK, 181);
 194                 REG_RMW_FIELD(ah, ctrl1[i],
 195                               AR_PHY_PAPRD_CTRL1_PAPRD_MAG_SCALE_FACT, 361);
 196                 REG_RMW_FIELD(ah, ctrl1[i],
 197                               AR_PHY_PAPRD_CTRL1_ADAPTIVE_SCALING_ENA, 0);
 198                 REG_RMW_FIELD(ah, ctrl0[i],
 199                               AR_PHY_PAPRD_CTRL0_PAPRD_MAG_THRSH, 3);
 200         }
 201
 202         ar9003_paprd_enable(ah, false);
 203
 204         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1,
 205                       AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_LB_SKIP, 0x30);
 206         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1,
 207                       AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_LB_ENABLE, 1);
 208         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1,
 209                       AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_TX_GAIN_FORCE, 1);
 210         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1,
 211                       AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_RX_BB_GAIN_FORCE, 0);
 212         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1,
 213                       AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_IQCORR_ENABLE, 0);
 214         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1,
 215                       AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_AGC2_SETTLING, 28);
 216         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1,
 217                       AR_PHY_PAPRD_TRAINER_CNTL1_CF_CF_PAPRD_TRAIN_ENABLE, 1);
 218
 219         if (AR_SREV_9485(ah)) {
 220                 val = 148;
 221         } else {
 222                 if (IS_CHAN_2GHZ(ah->curchan)) {
 223                         if (AR_SREV_9462(ah) || AR_SREV_9565(ah))
 224                                 val = 145;
 225                         else
 226                                 val = 147;
 227                 } else {
 228                         val = 137;
 229                 }
 230         }
 231
 232         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL2,
 233                       AR_PHY_PAPRD_TRAINER_CNTL2_CF_PAPRD_INIT_RX_BB_GAIN, val);
 234         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
 235                       AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_FINE_CORR_LEN, 4);
 236         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
 237                       AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_COARSE_CORR_LEN, 4);
 238         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
 239                       AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_NUM_CORR_STAGES, 7);
 240         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
 241                       AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_MIN_LOOPBACK_DEL, 1);
 242
 243         if (AR_SREV_9485(ah) ||
 244             AR_SREV_9462(ah) ||
 245             AR_SREV_9565(ah) ||
 246             AR_SREV_9550(ah) ||
 247             AR_SREV_9330(ah) ||
 248             AR_SREV_9340(ah))
 249                 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
 250                               AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_QUICK_DROP, -3);
 251         else
 252                 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
 253                               AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_QUICK_DROP, -6);
 254
 255         val = -10;
 256
 257         if (IS_CHAN_2GHZ(ah->curchan) && !AR_SREV_9462(ah) && !AR_SREV_9565(ah))
 258                 val = -15;
 259
 260         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
 261                       AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_ADC_DESIRED_SIZE,
 262                       val);
 263         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
 264                       AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_BBTXMIX_DISABLE, 1);
 265         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL4,
 266                       AR_PHY_PAPRD_TRAINER_CNTL4_CF_PAPRD_SAFETY_DELTA, 0);
 267         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL4,
 268                       AR_PHY_PAPRD_TRAINER_CNTL4_CF_PAPRD_MIN_CORR, 400);
 269         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL4,
 270                       AR_PHY_PAPRD_TRAINER_CNTL4_CF_PAPRD_NUM_TRAIN_SAMPLES,
 271                       100);
 272         REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_0_B0,
 273                       AR_PHY_PAPRD_PRE_POST_SCALING, 261376);
 274         REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_1_B0,
 275                       AR_PHY_PAPRD_PRE_POST_SCALING, 248079);
 276         REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_2_B0,
 277                       AR_PHY_PAPRD_PRE_POST_SCALING, 233759);
 278         REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_3_B0,
 279                       AR_PHY_PAPRD_PRE_POST_SCALING, 220464);
 280         REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_4_B0,
 281                       AR_PHY_PAPRD_PRE_POST_SCALING, 208194);
 282         REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_5_B0,
 283                       AR_PHY_PAPRD_PRE_POST_SCALING, 196949);
 284         REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_6_B0,
 285                       AR_PHY_PAPRD_PRE_POST_SCALING, 185706);
 286         REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_7_B0,
 287                       AR_PHY_PAPRD_PRE_POST_SCALING, 175487);
 288         return 0;
 289 }
 290
 291 static void ar9003_paprd_get_gain_table(struct ath_hw *ah)
 292 {
 293         u32 *entry = ah->paprd_gain_table_entries;
 294         u8 *index = ah->paprd_gain_table_index;
 295         u32 reg = AR_PHY_TXGAIN_TABLE;
 296         int i;
 297
 298         for (i = 0; i < PAPRD_GAIN_TABLE_ENTRIES; i++) {
 299                 entry[i] = REG_READ(ah, reg);
 300                 index[i] = (entry[i] >> 24) & 0xff;
 301                 reg += 4;
 302         }
 303 }
 304
 305 static unsigned int ar9003_get_desired_gain(struct ath_hw *ah, int chain,
 306                                             int target_power)
 307 {
 308         int olpc_gain_delta = 0, cl_gain_mod;
 309         int alpha_therm, alpha_volt;
 310         int therm_cal_value, volt_cal_value;
 311         int therm_value, volt_value;
 312         int thermal_gain_corr, voltage_gain_corr;
 313         int desired_scale, desired_gain = 0;
 314         u32 reg_olpc  = 0, reg_cl_gain  = 0;
 315
 316         REG_CLR_BIT(ah, AR_PHY_PAPRD_TRAINER_STAT1,
 317                     AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
 318         desired_scale = REG_READ_FIELD(ah, AR_PHY_TPC_12,
 319                                        AR_PHY_TPC_12_DESIRED_SCALE_HT40_5);
 320         alpha_therm = REG_READ_FIELD(ah, AR_PHY_TPC_19,
 321                                      AR_PHY_TPC_19_ALPHA_THERM);
 322         alpha_volt = REG_READ_FIELD(ah, AR_PHY_TPC_19,
 323                                     AR_PHY_TPC_19_ALPHA_VOLT);
 324         therm_cal_value = REG_READ_FIELD(ah, AR_PHY_TPC_18,
 325                                          AR_PHY_TPC_18_THERM_CAL_VALUE);
 326         volt_cal_value = REG_READ_FIELD(ah, AR_PHY_TPC_18,
 327                                         AR_PHY_TPC_18_VOLT_CAL_VALUE);
 328         therm_value = REG_READ_FIELD(ah, AR_PHY_BB_THERM_ADC_4,
 329                                      AR_PHY_BB_THERM_ADC_4_LATEST_THERM_VALUE);
 330         volt_value = REG_READ_FIELD(ah, AR_PHY_BB_THERM_ADC_4,
 331                                     AR_PHY_BB_THERM_ADC_4_LATEST_VOLT_VALUE);
 332
 333         switch (chain) {
 334         case 0:
 335                 reg_olpc = AR_PHY_TPC_11_B0;
 336                 reg_cl_gain = AR_PHY_CL_TAB_0;
 337                 break;
 338         case 1:
 339                 reg_olpc = AR_PHY_TPC_11_B1;
 340                 reg_cl_gain = AR_PHY_CL_TAB_1;
 341                 break;
 342         case 2:
 343                 reg_olpc = AR_PHY_TPC_11_B2;
 344                 reg_cl_gain = AR_PHY_CL_TAB_2;
 345                 break;
 346         default:
 347                 ath_dbg(ath9k_hw_common(ah), CALIBRATE,
 348                         "Invalid chainmask: %d\n", chain);
 349                 break;
 350         }
 351
 352         olpc_gain_delta = REG_READ_FIELD(ah, reg_olpc,
 353                                          AR_PHY_TPC_11_OLPC_GAIN_DELTA);
 354         cl_gain_mod = REG_READ_FIELD(ah, reg_cl_gain,
 355                                          AR_PHY_CL_TAB_CL_GAIN_MOD);
 356
 357         if (olpc_gain_delta >= 128)
 358                 olpc_gain_delta = olpc_gain_delta - 256;
 359
 360         thermal_gain_corr = (alpha_therm * (therm_value - therm_cal_value) +
 361                              (256 / 2)) / 256;
 362         voltage_gain_corr = (alpha_volt * (volt_value - volt_cal_value) +
 363                              (128 / 2)) / 128;
 364         desired_gain = target_power - olpc_gain_delta - thermal_gain_corr -
 365             voltage_gain_corr + desired_scale + cl_gain_mod;
 366
 367         return desired_gain;
 368 }
 369
 370 static void ar9003_tx_force_gain(struct ath_hw *ah, unsigned int gain_index)
 371 {
 372         int selected_gain_entry, txbb1dbgain, txbb6dbgain, txmxrgain;
 373         int padrvgnA, padrvgnB, padrvgnC, padrvgnD;
 374         u32 *gain_table_entries = ah->paprd_gain_table_entries;
 375
 376         selected_gain_entry = gain_table_entries[gain_index];
 377         txbb1dbgain = selected_gain_entry & 0x7;
 378         txbb6dbgain = (selected_gain_entry >> 3) & 0x3;
 379         txmxrgain = (selected_gain_entry >> 5) & 0xf;
 380         padrvgnA = (selected_gain_entry >> 9) & 0xf;
 381         padrvgnB = (selected_gain_entry >> 13) & 0xf;
 382         padrvgnC = (selected_gain_entry >> 17) & 0xf;
 383         padrvgnD = (selected_gain_entry >> 21) & 0x3;
 384
 385         REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 386                       AR_PHY_TX_FORCED_GAIN_FORCED_TXBB1DBGAIN, txbb1dbgain);
 387         REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 388                       AR_PHY_TX_FORCED_GAIN_FORCED_TXBB6DBGAIN, txbb6dbgain);
 389         REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 390                       AR_PHY_TX_FORCED_GAIN_FORCED_TXMXRGAIN, txmxrgain);
 391         REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 392                       AR_PHY_TX_FORCED_GAIN_FORCED_PADRVGNA, padrvgnA);
 393         REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 394                       AR_PHY_TX_FORCED_GAIN_FORCED_PADRVGNB, padrvgnB);
 395         REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 396                       AR_PHY_TX_FORCED_GAIN_FORCED_PADRVGNC, padrvgnC);
 397         REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 398                       AR_PHY_TX_FORCED_GAIN_FORCED_PADRVGND, padrvgnD);
 399         REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 400                       AR_PHY_TX_FORCED_GAIN_FORCED_ENABLE_PAL, 0);
 401         REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 402                       AR_PHY_TX_FORCED_GAIN_FORCE_TX_GAIN, 0);
 403         REG_RMW_FIELD(ah, AR_PHY_TPC_1, AR_PHY_TPC_1_FORCED_DAC_GAIN, 0);
 404         REG_RMW_FIELD(ah, AR_PHY_TPC_1, AR_PHY_TPC_1_FORCE_DAC_GAIN, 0);
 405 }
 406
 407 static inline int find_expn(int num)
 408 {
 409         return fls(num) - 1;
 410 }
 411
 412 static inline int find_proper_scale(int expn, int N)
 413 {
 414         return (expn > N) ? expn - 10 : 0;
 415 }
 416
 417 #define NUM_BIN 23
 418
 419 static bool create_pa_curve(u32 *data_L, u32 *data_U, u32 *pa_table, u16 *gain)
 420 {
 421         unsigned int thresh_accum_cnt;
 422         int x_est[NUM_BIN + 1], Y[NUM_BIN + 1], theta[NUM_BIN + 1];
 423         int PA_in[NUM_BIN + 1];
 424         int B1_tmp[NUM_BIN + 1], B2_tmp[NUM_BIN + 1];
 425         unsigned int B1_abs_max, B2_abs_max;
 426         int max_index, scale_factor;
 427         int y_est[NUM_BIN + 1];
 428         int x_est_fxp1_nonlin, x_tilde[NUM_BIN + 1];
 429         unsigned int x_tilde_abs;
 430         int G_fxp, Y_intercept, order_x_by_y, M, I, L, sum_y_sqr, sum_y_quad;
 431         int Q_x, Q_B1, Q_B2, beta_raw, alpha_raw, scale_B;
 432         int Q_scale_B, Q_beta, Q_alpha, alpha, beta, order_1, order_2;
 433         int order1_5x, order2_3x, order1_5x_rem, order2_3x_rem;
 434         int y5, y3, tmp;
 435         int theta_low_bin = 0;
 436         int i;
 437
 438         /* disregard any bin that contains <= 16 samples */
 439         thresh_accum_cnt = 16;
 440         scale_factor = 5;
 441         max_index = 0;
 442         memset(theta, 0, sizeof(theta));
 443         memset(x_est, 0, sizeof(x_est));
 444         memset(Y, 0, sizeof(Y));
 445         memset(y_est, 0, sizeof(y_est));
 446         memset(x_tilde, 0, sizeof(x_tilde));
 447
 448         for (i = 0; i < NUM_BIN; i++) {
 449                 s32 accum_cnt, accum_tx, accum_rx, accum_ang;
 450
 451                 /* number of samples */
 452                 accum_cnt = data_L[i] & 0xffff;
 453
 454                 if (accum_cnt <= thresh_accum_cnt)
 455                         continue;
 456
 457                 max_index++;
 458
 459                 /* sum(tx amplitude) */
 460                 accum_tx = ((data_L[i] >> 16) & 0xffff) |
 461                     ((data_U[i] & 0x7ff) << 16);
 462
 463                 /* sum(rx amplitude distance to lower bin edge) */
 464                 accum_rx = ((data_U[i] >> 11) & 0x1f) |
 465                     ((data_L[i + 23] & 0xffff) << 5);
 466
 467                 /* sum(angles) */
 468                 accum_ang = ((data_L[i + 23] >> 16) & 0xffff) |
 469                     ((data_U[i + 23] & 0x7ff) << 16);
 470
 471                 accum_tx <<= scale_factor;
 472                 accum_rx <<= scale_factor;
 473                 x_est[max_index] =
 474                         (((accum_tx + accum_cnt) / accum_cnt) + 32) >>
 475                         scale_factor;
 476
 477                 Y[max_index] =
 478                         ((((accum_rx + accum_cnt) / accum_cnt) + 32) >>
 479                             scale_factor) +
 480                         (1 << scale_factor) * i + 16;
 481
 482                 if (accum_ang >= (1 << 26))
 483                         accum_ang -= 1 << 27;
 484
 485                 theta[max_index] =
 486                         ((accum_ang * (1 << scale_factor)) + accum_cnt) /
 487                         accum_cnt;
 488         }
 489
 490         /*
 491          * Find average theta of first 5 bin and all of those to same value.
 492          * Curve is linear at that range.
 493          */
 494         for (i = 1; i < 6; i++)
 495                 theta_low_bin += theta[i];
 496
 497         theta_low_bin = theta_low_bin / 5;
 498         for (i = 1; i < 6; i++)
 499                 theta[i] = theta_low_bin;
 500
 501         /* Set values at origin */
 502         theta[0] = theta_low_bin;
 503         for (i = 0; i <= max_index; i++)
 504                 theta[i] -= theta_low_bin;
 505
 506         x_est[0] = 0;
 507         Y[0] = 0;
 508         scale_factor = 8;
 509
 510         /* low signal gain */
 511         if (x_est[6] == x_est[3])
 512                 return false;
 513
 514         G_fxp =
 515             (((Y[6] - Y[3]) * 1 << scale_factor) +
 516              (x_est[6] - x_est[3])) / (x_est[6] - x_est[3]);
 517
 518         /* prevent division by zero */
 519         if (G_fxp == 0)
 520                 return false;
 521
 522         Y_intercept =
 523             (G_fxp * (x_est[0] - x_est[3]) +
 524              (1 << scale_factor)) / (1 << scale_factor) + Y[3];
 525
 526         for (i = 0; i <= max_index; i++)
 527                 y_est[i] = Y[i] - Y_intercept;
 528
 529         for (i = 0; i <= 3; i++) {
 530                 y_est[i] = i * 32;
 531                 x_est[i] = ((y_est[i] * 1 << scale_factor) + G_fxp) / G_fxp;
 532         }
 533
 534         if (y_est[max_index] == 0)
 535                 return false;
 536
 537         x_est_fxp1_nonlin =
 538             x_est[max_index] - ((1 << scale_factor) * y_est[max_index] +
 539                                 G_fxp) / G_fxp;
 540
 541         order_x_by_y =
 542             (x_est_fxp1_nonlin + y_est[max_index]) / y_est[max_index];
 543
 544         if (order_x_by_y == 0)
 545                 M = 10;
 546         else if (order_x_by_y == 1)
 547                 M = 9;
 548         else
 549                 M = 8;
 550
 551         I = (max_index > 15) ? 7 : max_index >> 1;
 552         L = max_index - I;
 553         scale_factor = 8;
 554         sum_y_sqr = 0;
 555         sum_y_quad = 0;
 556         x_tilde_abs = 0;
 557
 558         for (i = 0; i <= L; i++) {
 559                 unsigned int y_sqr;
 560                 unsigned int y_quad;
 561                 unsigned int tmp_abs;
 562
 563                 /* prevent division by zero */
 564                 if (y_est[i + I] == 0)
 565                         return false;
 566
 567                 x_est_fxp1_nonlin =
 568                     x_est[i + I] - ((1 << scale_factor) * y_est[i + I] +
 569                                     G_fxp) / G_fxp;
 570
 571                 x_tilde[i] =
 572                     (x_est_fxp1_nonlin * (1 << M) + y_est[i + I]) / y_est[i +
 573                                                                           I];
 574                 x_tilde[i] =
 575                     (x_tilde[i] * (1 << M) + y_est[i + I]) / y_est[i + I];
 576                 x_tilde[i] =
 577                     (x_tilde[i] * (1 << M) + y_est[i + I]) / y_est[i + I];
 578                 y_sqr =
 579                     (y_est[i + I] * y_est[i + I] +
 580                      (scale_factor * scale_factor)) / (scale_factor *
 581                                                        scale_factor);
 582                 tmp_abs = abs(x_tilde[i]);
 583                 if (tmp_abs > x_tilde_abs)
 584                         x_tilde_abs = tmp_abs;
 585
 586                 y_quad = y_sqr * y_sqr;
 587                 sum_y_sqr = sum_y_sqr + y_sqr;
 588                 sum_y_quad = sum_y_quad + y_quad;
 589                 B1_tmp[i] = y_sqr * (L + 1);
 590                 B2_tmp[i] = y_sqr;
 591         }
 592
 593         B1_abs_max = 0;
 594         B2_abs_max = 0;
 595         for (i = 0; i <= L; i++) {
 596                 int abs_val;
 597
 598                 B1_tmp[i] -= sum_y_sqr;
 599                 B2_tmp[i] = sum_y_quad - sum_y_sqr * B2_tmp[i];
 600
 601                 abs_val = abs(B1_tmp[i]);
 602                 if (abs_val > B1_abs_max)
 603                         B1_abs_max = abs_val;
 604
 605                 abs_val = abs(B2_tmp[i]);
 606                 if (abs_val > B2_abs_max)
 607                         B2_abs_max = abs_val;
 608         }
 609
 610         Q_x = find_proper_scale(find_expn(x_tilde_abs), 10);
 611         Q_B1 = find_proper_scale(find_expn(B1_abs_max), 10);
 612         Q_B2 = find_proper_scale(find_expn(B2_abs_max), 10);
 613
 614         beta_raw = 0;
 615         alpha_raw = 0;
 616         for (i = 0; i <= L; i++) {
 617                 x_tilde[i] = x_tilde[i] / (1 << Q_x);
 618                 B1_tmp[i] = B1_tmp[i] / (1 << Q_B1);
 619                 B2_tmp[i] = B2_tmp[i] / (1 << Q_B2);
 620                 beta_raw = beta_raw + B1_tmp[i] * x_tilde[i];
 621                 alpha_raw = alpha_raw + B2_tmp[i] * x_tilde[i];
 622         }
 623
 624         scale_B =
 625             ((sum_y_quad / scale_factor) * (L + 1) -
 626              (sum_y_sqr / scale_factor) * sum_y_sqr) * scale_factor;
 627
 628         Q_scale_B = find_proper_scale(find_expn(abs(scale_B)), 10);
 629         scale_B = scale_B / (1 << Q_scale_B);
 630         if (scale_B == 0)
 631                 return false;
 632         Q_beta = find_proper_scale(find_expn(abs(beta_raw)), 10);
 633         Q_alpha = find_proper_scale(find_expn(abs(alpha_raw)), 10);
 634         beta_raw = beta_raw / (1 << Q_beta);
 635         alpha_raw = alpha_raw / (1 << Q_alpha);
 636         alpha = (alpha_raw << 10) / scale_B;
 637         beta = (beta_raw << 10) / scale_B;
 638         order_1 = 3 * M - Q_x - Q_B1 - Q_beta + 10 + Q_scale_B;
 639         order_2 = 3 * M - Q_x - Q_B2 - Q_alpha + 10 + Q_scale_B;
 640         order1_5x = order_1 / 5;
 641         order2_3x = order_2 / 3;
 642         order1_5x_rem = order_1 - 5 * order1_5x;
 643         order2_3x_rem = order_2 - 3 * order2_3x;
 644
 645         for (i = 0; i < PAPRD_TABLE_SZ; i++) {
 646                 tmp = i * 32;
 647                 y5 = ((beta * tmp) >> 6) >> order1_5x;
 648                 y5 = (y5 * tmp) >> order1_5x;
 649                 y5 = (y5 * tmp) >> order1_5x;
 650                 y5 = (y5 * tmp) >> order1_5x;
 651                 y5 = (y5 * tmp) >> order1_5x;
 652                 y5 = y5 >> order1_5x_rem;
 653                 y3 = (alpha * tmp) >> order2_3x;
 654                 y3 = (y3 * tmp) >> order2_3x;
 655                 y3 = (y3 * tmp) >> order2_3x;
 656                 y3 = y3 >> order2_3x_rem;
 657                 PA_in[i] = y5 + y3 + (256 * tmp) / G_fxp;
 658
 659                 if (i >= 2) {
 660                         tmp = PA_in[i] - PA_in[i - 1];
 661                         if (tmp < 0)
 662                                 PA_in[i] =
 663                                     PA_in[i - 1] + (PA_in[i - 1] -
 664                                                     PA_in[i - 2]);
 665                 }
 666
 667                 PA_in[i] = (PA_in[i] < 1400) ? PA_in[i] : 1400;
 668         }
 669
 670         beta_raw = 0;
 671         alpha_raw = 0;
 672
 673         for (i = 0; i <= L; i++) {
 674                 int theta_tilde =
 675                     ((theta[i + I] << M) + y_est[i + I]) / y_est[i + I];
 676                 theta_tilde =
 677                     ((theta_tilde << M) + y_est[i + I]) / y_est[i + I];
 678                 theta_tilde =
 679                     ((theta_tilde << M) + y_est[i + I]) / y_est[i + I];
 680                 beta_raw = beta_raw + B1_tmp[i] * theta_tilde;
 681                 alpha_raw = alpha_raw + B2_tmp[i] * theta_tilde;
 682         }
 683
 684         Q_beta = find_proper_scale(find_expn(abs(beta_raw)), 10);
 685         Q_alpha = find_proper_scale(find_expn(abs(alpha_raw)), 10);
 686         beta_raw = beta_raw / (1 << Q_beta);
 687         alpha_raw = alpha_raw / (1 << Q_alpha);
 688
 689         alpha = (alpha_raw << 10) / scale_B;
 690         beta = (beta_raw << 10) / scale_B;
 691         order_1 = 3 * M - Q_x - Q_B1 - Q_beta + 10 + Q_scale_B + 5;
 692         order_2 = 3 * M - Q_x - Q_B2 - Q_alpha + 10 + Q_scale_B + 5;
 693         order1_5x = order_1 / 5;
 694         order2_3x = order_2 / 3;
 695         order1_5x_rem = order_1 - 5 * order1_5x;
 696         order2_3x_rem = order_2 - 3 * order2_3x;
 697
 698         for (i = 0; i < PAPRD_TABLE_SZ; i++) {
 699                 int PA_angle;
 700
 701                 /* pa_table[4] is calculated from PA_angle for i=5 */
 702                 if (i == 4)
 703                         continue;
 704
 705                 tmp = i * 32;
 706                 if (beta > 0)
 707                         y5 = (((beta * tmp - 64) >> 6) -
 708                               (1 << order1_5x)) / (1 << order1_5x);
 709                 else
 710                         y5 = ((((beta * tmp - 64) >> 6) +
 711                                (1 << order1_5x)) / (1 << order1_5x));
 712
 713                 y5 = (y5 * tmp) / (1 << order1_5x);
 714                 y5 = (y5 * tmp) / (1 << order1_5x);
 715                 y5 = (y5 * tmp) / (1 << order1_5x);
 716                 y5 = (y5 * tmp) / (1 << order1_5x);
 717                 y5 = y5 / (1 << order1_5x_rem);
 718
 719                 if (beta > 0)
 720                         y3 = (alpha * tmp -
 721                               (1 << order2_3x)) / (1 << order2_3x);
 722                 else
 723                         y3 = (alpha * tmp +
 724                               (1 << order2_3x)) / (1 << order2_3x);
 725                 y3 = (y3 * tmp) / (1 << order2_3x);
 726                 y3 = (y3 * tmp) / (1 << order2_3x);
 727                 y3 = y3 / (1 << order2_3x_rem);
 728
 729                 if (i < 4) {
 730                         PA_angle = 0;
 731                 } else {
 732                         PA_angle = y5 + y3;
 733                         if (PA_angle < -150)
 734                                 PA_angle = -150;
 735                         else if (PA_angle > 150)
 736                                 PA_angle = 150;
 737                 }
 738
 739                 pa_table[i] = ((PA_in[i] & 0x7ff) << 11) + (PA_angle & 0x7ff);
 740                 if (i == 5) {
 741                         PA_angle = (PA_angle + 2) >> 1;
 742                         pa_table[i - 1] = ((PA_in[i - 1] & 0x7ff) << 11) +
 743                             (PA_angle & 0x7ff);
 744                 }
 745         }
 746
 747         *gain = G_fxp;
 748         return true;
 749 }
 750
 751 void ar9003_paprd_populate_single_table(struct ath_hw *ah,
 752                                         struct ath9k_hw_cal_data *caldata,
 753                                         int chain)
 754 {
 755         u32 *paprd_table_val = caldata->pa_table[chain];
 756         u32 small_signal_gain = caldata->small_signal_gain[chain];
 757         u32 training_power = ah->paprd_training_power;
 758         u32 reg = 0;
 759         int i;
 760
 761         if (chain == 0)
 762                 reg = AR_PHY_PAPRD_MEM_TAB_B0;
 763         else if (chain == 1)
 764                 reg = AR_PHY_PAPRD_MEM_TAB_B1;
 765         else if (chain == 2)
 766                 reg = AR_PHY_PAPRD_MEM_TAB_B2;
 767
 768         for (i = 0; i < PAPRD_TABLE_SZ; i++) {
 769                 REG_WRITE(ah, reg, paprd_table_val[i]);
 770                 reg = reg + 4;
 771         }
 772
 773         if (chain == 0)
 774                 reg = AR_PHY_PA_GAIN123_B0;
 775         else if (chain == 1)
 776                 reg = AR_PHY_PA_GAIN123_B1;
 777         else
 778                 reg = AR_PHY_PA_GAIN123_B2;
 779
 780         REG_RMW_FIELD(ah, reg, AR_PHY_PA_GAIN123_PA_GAIN1, small_signal_gain);
 781
 782         REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL1_B0,
 783                       AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL,
 784                       training_power);
 785
 786         if (ah->caps.tx_chainmask & BIT(1))
 787                 REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL1_B1,
 788                               AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL,
 789                               training_power);
 790
 791         if (ah->caps.tx_chainmask & BIT(2))
 792                 /* val AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL correct? */
 793                 REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL1_B2,
 794                               AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL,
 795                               training_power);
 796 }
 797 EXPORT_SYMBOL(ar9003_paprd_populate_single_table);
 798
 799 void ar9003_paprd_setup_gain_table(struct ath_hw *ah, int chain)
 800 {
 801         unsigned int i, desired_gain, gain_index;
 802         unsigned int train_power = ah->paprd_training_power;
 803
 804         desired_gain = ar9003_get_desired_gain(ah, chain, train_power);
 805
 806         gain_index = 0;
 807         for (i = 0; i < PAPRD_GAIN_TABLE_ENTRIES; i++) {
 808                 if (ah->paprd_gain_table_index[i] >= desired_gain)
 809                         break;
 810                 gain_index++;
 811         }
 812
 813         ar9003_tx_force_gain(ah, gain_index);
 814
 815         REG_CLR_BIT(ah, AR_PHY_PAPRD_TRAINER_STAT1,
 816                         AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
 817 }
 818 EXPORT_SYMBOL(ar9003_paprd_setup_gain_table);
 819
 820 static bool ar9003_paprd_retrain_pa_in(struct ath_hw *ah,
 821                                        struct ath9k_hw_cal_data *caldata,
 822                                        int chain)
 823 {
 824         u32 *pa_in = caldata->pa_table[chain];
 825         int capdiv_offset, quick_drop_offset;
 826         int capdiv2g, quick_drop;
 827         int count = 0;
 828         int i;
 829
 830         if (!AR_SREV_9485(ah) && !AR_SREV_9330(ah))
 831                 return false;
 832
 833         capdiv2g = REG_READ_FIELD(ah, AR_PHY_65NM_CH0_TXRF3,
 834                                   AR_PHY_65NM_CH0_TXRF3_CAPDIV2G);
 835
 836         quick_drop = REG_READ_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
 837                                     AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_QUICK_DROP);
 838
 839         if (quick_drop)
 840                 quick_drop -= 0x40;
 841
 842         for (i = 0; i < NUM_BIN + 1; i++) {
 843                 if (pa_in[i] == 1400)
 844                         count++;
 845         }
 846
 847         if (AR_SREV_9485(ah)) {
 848                 if (pa_in[23] < 800) {
 849                         capdiv_offset = (int)((1000 - pa_in[23] + 75) / 150);
 850                         capdiv2g += capdiv_offset;
 851                         if (capdiv2g > 7) {
 852                                 capdiv2g = 7;
 853                                 if (pa_in[23] < 600) {
 854                                         quick_drop++;
 855                                         if (quick_drop > 0)
 856                                                 quick_drop = 0;
 857                                 }
 858                         }
 859                 } else if (pa_in[23] == 1400) {
 860                         quick_drop_offset = min_t(int, count / 3, 2);
 861                         quick_drop += quick_drop_offset;
 862                         capdiv2g += quick_drop_offset / 2;
 863
 864                         if (capdiv2g > 7)
 865                                 capdiv2g = 7;
 866
 867                         if (quick_drop > 0) {
 868                                 quick_drop = 0;
 869                                 capdiv2g -= quick_drop_offset;
 870                                 if (capdiv2g < 0)
 871                                         capdiv2g = 0;
 872                         }
 873                 } else {
 874                         return false;
 875                 }
 876         } else if (AR_SREV_9330(ah)) {
 877                 if (pa_in[23] < 1000) {
 878                         capdiv_offset = (1000 - pa_in[23]) / 100;
 879                         capdiv2g += capdiv_offset;
 880                         if (capdiv_offset > 3) {
 881                                 capdiv_offset = 1;
 882                                 quick_drop--;
 883                         }
 884
 885                         capdiv2g += capdiv_offset;
 886                         if (capdiv2g > 6)
 887                                 capdiv2g = 6;
 888                         if (quick_drop < -4)
 889                                 quick_drop = -4;
 890                 } else if (pa_in[23] == 1400) {
 891                         if (count > 3) {
 892                                 quick_drop++;
 893                                 capdiv2g -= count / 4;
 894                                 if (quick_drop > -2)
 895                                         quick_drop = -2;
 896                         } else {
 897                                 capdiv2g--;
 898                         }
 899
 900                         if (capdiv2g < 0)
 901                                 capdiv2g = 0;
 902                 } else {
 903                         return false;
 904                 }
 905         }
 906
 907         REG_RMW_FIELD(ah, AR_PHY_65NM_CH0_TXRF3,
 908                       AR_PHY_65NM_CH0_TXRF3_CAPDIV2G, capdiv2g);
 909         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
 910                       AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_QUICK_DROP,
 911                       quick_drop);
 912
 913         return true;
 914 }
 915
 916 int ar9003_paprd_create_curve(struct ath_hw *ah,
 917                               struct ath9k_hw_cal_data *caldata, int chain)
 918 {
 919         u16 *small_signal_gain = &caldata->small_signal_gain[chain];
 920         u32 *pa_table = caldata->pa_table[chain];
 921         u32 *data_L, *data_U;
 922         int i, status = 0;
 923         u32 *buf;
 924         u32 reg;
 925
 926         memset(caldata->pa_table[chain], 0, sizeof(caldata->pa_table[chain]));
 927
 928         buf = kmalloc(2 * 48 * sizeof(u32), GFP_KERNEL);
 929         if (!buf)
 930                 return -ENOMEM;
 931
 932         data_L = &buf[0];
 933         data_U = &buf[48];
 934
 935         REG_CLR_BIT(ah, AR_PHY_CHAN_INFO_MEMORY,
 936                     AR_PHY_CHAN_INFO_MEMORY_CHANINFOMEM_S2_READ);
 937
 938         reg = AR_PHY_CHAN_INFO_TAB_0;
 939         for (i = 0; i < 48; i++)
 940                 data_L[i] = REG_READ(ah, reg + (i << 2));
 941
 942         REG_SET_BIT(ah, AR_PHY_CHAN_INFO_MEMORY,
 943                     AR_PHY_CHAN_INFO_MEMORY_CHANINFOMEM_S2_READ);
 944
 945         for (i = 0; i < 48; i++)
 946                 data_U[i] = REG_READ(ah, reg + (i << 2));
 947
 948         if (!create_pa_curve(data_L, data_U, pa_table, small_signal_gain))
 949                 status = -2;
 950
 951         if (ar9003_paprd_retrain_pa_in(ah, caldata, chain))
 952                 status = -EINPROGRESS;
 953
 954         REG_CLR_BIT(ah, AR_PHY_PAPRD_TRAINER_STAT1,
 955                     AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
 956
 957         kfree(buf);
 958
 959         return status;
 960 }
 961 EXPORT_SYMBOL(ar9003_paprd_create_curve);
 962
 963 int ar9003_paprd_init_table(struct ath_hw *ah)
 964 {
 965         int ret;
 966
 967         ret = ar9003_paprd_setup_single_table(ah);
 968         if (ret < 0)
 969             return ret;
 970
 971         ar9003_paprd_get_gain_table(ah);
 972         return 0;
 973 }
 974 EXPORT_SYMBOL(ar9003_paprd_init_table);
 975
 976 bool ar9003_paprd_is_done(struct ath_hw *ah)
 977 {
 978         int paprd_done, agc2_pwr;
 979
 980         paprd_done = REG_READ_FIELD(ah, AR_PHY_PAPRD_TRAINER_STAT1,
 981                                 AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
 982
 983         if (AR_SREV_9485(ah))
 984                 goto exit;
 985
 986         if (paprd_done == 0x1) {
 987                 agc2_pwr = REG_READ_FIELD(ah, AR_PHY_PAPRD_TRAINER_STAT1,
 988                                 AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_AGC2_PWR);
 989
 990                 ath_dbg(ath9k_hw_common(ah), CALIBRATE,
 991                         "AGC2_PWR = 0x%x training done = 0x%x\n",
 992                         agc2_pwr, paprd_done);
 993         /*
 994          * agc2_pwr range should not be less than 'IDEAL_AGC2_PWR_CHANGE'
 995          * when the training is completely done, otherwise retraining is
 996          * done to make sure the value is in ideal range
 997          */
 998                 if (agc2_pwr <= PAPRD_IDEAL_AGC2_PWR_RANGE)
 999                         paprd_done = 0;
1000         }
1001 exit:
1002         return !!paprd_done;
1003 }
1004 EXPORT_SYMBOL(ar9003_paprd_is_done);
1005
1006 bool ar9003_is_paprd_enabled(struct ath_hw *ah)
1007 {
1008         if ((ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->config.enable_paprd)
1009                 return true;
1010
1011         return false;
1012 }
1013 EXPORT_SYMBOL(ar9003_is_paprd_enabled);