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                 /* sum(tx amplitude) */
 458                 accum_tx = ((data_L[i] >> 16) & 0xffff) |
 459                     ((data_U[i] & 0x7ff) << 16);
 460
 461                 /* sum(rx amplitude distance to lower bin edge) */
 462                 accum_rx = ((data_U[i] >> 11) & 0x1f) |
 463                     ((data_L[i + 23] & 0xffff) << 5);
 464
 465                 /* sum(angles) */
 466                 accum_ang = ((data_L[i + 23] >> 16) & 0xffff) |
 467                     ((data_U[i + 23] & 0x7ff) << 16);
 468
 469                 accum_tx <<= scale_factor;
 470                 accum_rx <<= scale_factor;
 471                 x_est[i + 1] = (((accum_tx + accum_cnt) / accum_cnt) + 32) >>
 472                     scale_factor;
 473
 474                 Y[i + 1] = ((((accum_rx + accum_cnt) / accum_cnt) + 32) >>
 475                             scale_factor) +
 476                             (1 << scale_factor) * max_index + 16;
 477
 478                 if (accum_ang >= (1 << 26))
 479                         accum_ang -= 1 << 27;
 480
 481                 theta[i + 1] = ((accum_ang * (1 << scale_factor)) + accum_cnt) /
 482                     accum_cnt;
 483
 484                 max_index++;
 485         }
 486
 487         /*
 488          * Find average theta of first 5 bin and all of those to same value.
 489          * Curve is linear at that range.
 490          */
 491         for (i = 1; i < 6; i++)
 492                 theta_low_bin += theta[i];
 493
 494         theta_low_bin = theta_low_bin / 5;
 495         for (i = 1; i < 6; i++)
 496                 theta[i] = theta_low_bin;
 497
 498         /* Set values at origin */
 499         theta[0] = theta_low_bin;
 500         for (i = 0; i <= max_index; i++)
 501                 theta[i] -= theta_low_bin;
 502
 503         x_est[0] = 0;
 504         Y[0] = 0;
 505         scale_factor = 8;
 506
 507         /* low signal gain */
 508         if (x_est[6] == x_est[3])
 509                 return false;
 510
 511         G_fxp =
 512             (((Y[6] - Y[3]) * 1 << scale_factor) +
 513              (x_est[6] - x_est[3])) / (x_est[6] - x_est[3]);
 514
 515         /* prevent division by zero */
 516         if (G_fxp == 0)
 517                 return false;
 518
 519         Y_intercept =
 520             (G_fxp * (x_est[0] - x_est[3]) +
 521              (1 << scale_factor)) / (1 << scale_factor) + Y[3];
 522
 523         for (i = 0; i <= max_index; i++)
 524                 y_est[i] = Y[i] - Y_intercept;
 525
 526         for (i = 0; i <= 3; i++) {
 527                 y_est[i] = i * 32;
 528                 x_est[i] = ((y_est[i] * 1 << scale_factor) + G_fxp) / G_fxp;
 529         }
 530
 531         if (y_est[max_index] == 0)
 532                 return false;
 533
 534         x_est_fxp1_nonlin =
 535             x_est[max_index] - ((1 << scale_factor) * y_est[max_index] +
 536                                 G_fxp) / G_fxp;
 537
 538         order_x_by_y =
 539             (x_est_fxp1_nonlin + y_est[max_index]) / y_est[max_index];
 540
 541         if (order_x_by_y == 0)
 542                 M = 10;
 543         else if (order_x_by_y == 1)
 544                 M = 9;
 545         else
 546                 M = 8;
 547
 548         I = (max_index > 15) ? 7 : max_index >> 1;
 549         L = max_index - I;
 550         scale_factor = 8;
 551         sum_y_sqr = 0;
 552         sum_y_quad = 0;
 553         x_tilde_abs = 0;
 554
 555         for (i = 0; i <= L; i++) {
 556                 unsigned int y_sqr;
 557                 unsigned int y_quad;
 558                 unsigned int tmp_abs;
 559
 560                 /* prevent division by zero */
 561                 if (y_est[i + I] == 0)
 562                         return false;
 563
 564                 x_est_fxp1_nonlin =
 565                     x_est[i + I] - ((1 << scale_factor) * y_est[i + I] +
 566                                     G_fxp) / G_fxp;
 567
 568                 x_tilde[i] =
 569                     (x_est_fxp1_nonlin * (1 << M) + y_est[i + I]) / y_est[i +
 570                                                                           I];
 571                 x_tilde[i] =
 572                     (x_tilde[i] * (1 << M) + y_est[i + I]) / y_est[i + I];
 573                 x_tilde[i] =
 574                     (x_tilde[i] * (1 << M) + y_est[i + I]) / y_est[i + I];
 575                 y_sqr =
 576                     (y_est[i + I] * y_est[i + I] +
 577                      (scale_factor * scale_factor)) / (scale_factor *
 578                                                        scale_factor);
 579                 tmp_abs = abs(x_tilde[i]);
 580                 if (tmp_abs > x_tilde_abs)
 581                         x_tilde_abs = tmp_abs;
 582
 583                 y_quad = y_sqr * y_sqr;
 584                 sum_y_sqr = sum_y_sqr + y_sqr;
 585                 sum_y_quad = sum_y_quad + y_quad;
 586                 B1_tmp[i] = y_sqr * (L + 1);
 587                 B2_tmp[i] = y_sqr;
 588         }
 589
 590         B1_abs_max = 0;
 591         B2_abs_max = 0;
 592         for (i = 0; i <= L; i++) {
 593                 int abs_val;
 594
 595                 B1_tmp[i] -= sum_y_sqr;
 596                 B2_tmp[i] = sum_y_quad - sum_y_sqr * B2_tmp[i];
 597
 598                 abs_val = abs(B1_tmp[i]);
 599                 if (abs_val > B1_abs_max)
 600                         B1_abs_max = abs_val;
 601
 602                 abs_val = abs(B2_tmp[i]);
 603                 if (abs_val > B2_abs_max)
 604                         B2_abs_max = abs_val;
 605         }
 606
 607         Q_x = find_proper_scale(find_expn(x_tilde_abs), 10);
 608         Q_B1 = find_proper_scale(find_expn(B1_abs_max), 10);
 609         Q_B2 = find_proper_scale(find_expn(B2_abs_max), 10);
 610
 611         beta_raw = 0;
 612         alpha_raw = 0;
 613         for (i = 0; i <= L; i++) {
 614                 x_tilde[i] = x_tilde[i] / (1 << Q_x);
 615                 B1_tmp[i] = B1_tmp[i] / (1 << Q_B1);
 616                 B2_tmp[i] = B2_tmp[i] / (1 << Q_B2);
 617                 beta_raw = beta_raw + B1_tmp[i] * x_tilde[i];
 618                 alpha_raw = alpha_raw + B2_tmp[i] * x_tilde[i];
 619         }
 620
 621         scale_B =
 622             ((sum_y_quad / scale_factor) * (L + 1) -
 623              (sum_y_sqr / scale_factor) * sum_y_sqr) * scale_factor;
 624
 625         Q_scale_B = find_proper_scale(find_expn(abs(scale_B)), 10);
 626         scale_B = scale_B / (1 << Q_scale_B);
 627         if (scale_B == 0)
 628                 return false;
 629         Q_beta = find_proper_scale(find_expn(abs(beta_raw)), 10);
 630         Q_alpha = find_proper_scale(find_expn(abs(alpha_raw)), 10);
 631         beta_raw = beta_raw / (1 << Q_beta);
 632         alpha_raw = alpha_raw / (1 << Q_alpha);
 633         alpha = (alpha_raw << 10) / scale_B;
 634         beta = (beta_raw << 10) / scale_B;
 635         order_1 = 3 * M - Q_x - Q_B1 - Q_beta + 10 + Q_scale_B;
 636         order_2 = 3 * M - Q_x - Q_B2 - Q_alpha + 10 + Q_scale_B;
 637         order1_5x = order_1 / 5;
 638         order2_3x = order_2 / 3;
 639         order1_5x_rem = order_1 - 5 * order1_5x;
 640         order2_3x_rem = order_2 - 3 * order2_3x;
 641
 642         for (i = 0; i < PAPRD_TABLE_SZ; i++) {
 643                 tmp = i * 32;
 644                 y5 = ((beta * tmp) >> 6) >> order1_5x;
 645                 y5 = (y5 * tmp) >> order1_5x;
 646                 y5 = (y5 * tmp) >> order1_5x;
 647                 y5 = (y5 * tmp) >> order1_5x;
 648                 y5 = (y5 * tmp) >> order1_5x;
 649                 y5 = y5 >> order1_5x_rem;
 650                 y3 = (alpha * tmp) >> order2_3x;
 651                 y3 = (y3 * tmp) >> order2_3x;
 652                 y3 = (y3 * tmp) >> order2_3x;
 653                 y3 = y3 >> order2_3x_rem;
 654                 PA_in[i] = y5 + y3 + (256 * tmp) / G_fxp;
 655
 656                 if (i >= 2) {
 657                         tmp = PA_in[i] - PA_in[i - 1];
 658                         if (tmp < 0)
 659                                 PA_in[i] =
 660                                     PA_in[i - 1] + (PA_in[i - 1] -
 661                                                     PA_in[i - 2]);
 662                 }
 663
 664                 PA_in[i] = (PA_in[i] < 1400) ? PA_in[i] : 1400;
 665         }
 666
 667         beta_raw = 0;
 668         alpha_raw = 0;
 669
 670         for (i = 0; i <= L; i++) {
 671                 int theta_tilde =
 672                     ((theta[i + I] << M) + y_est[i + I]) / y_est[i + I];
 673                 theta_tilde =
 674                     ((theta_tilde << M) + y_est[i + I]) / y_est[i + I];
 675                 theta_tilde =
 676                     ((theta_tilde << M) + y_est[i + I]) / y_est[i + I];
 677                 beta_raw = beta_raw + B1_tmp[i] * theta_tilde;
 678                 alpha_raw = alpha_raw + B2_tmp[i] * theta_tilde;
 679         }
 680
 681         Q_beta = find_proper_scale(find_expn(abs(beta_raw)), 10);
 682         Q_alpha = find_proper_scale(find_expn(abs(alpha_raw)), 10);
 683         beta_raw = beta_raw / (1 << Q_beta);
 684         alpha_raw = alpha_raw / (1 << Q_alpha);
 685
 686         alpha = (alpha_raw << 10) / scale_B;
 687         beta = (beta_raw << 10) / scale_B;
 688         order_1 = 3 * M - Q_x - Q_B1 - Q_beta + 10 + Q_scale_B + 5;
 689         order_2 = 3 * M - Q_x - Q_B2 - Q_alpha + 10 + Q_scale_B + 5;
 690         order1_5x = order_1 / 5;
 691         order2_3x = order_2 / 3;
 692         order1_5x_rem = order_1 - 5 * order1_5x;
 693         order2_3x_rem = order_2 - 3 * order2_3x;
 694
 695         for (i = 0; i < PAPRD_TABLE_SZ; i++) {
 696                 int PA_angle;
 697
 698                 /* pa_table[4] is calculated from PA_angle for i=5 */
 699                 if (i == 4)
 700                         continue;
 701
 702                 tmp = i * 32;
 703                 if (beta > 0)
 704                         y5 = (((beta * tmp - 64) >> 6) -
 705                               (1 << order1_5x)) / (1 << order1_5x);
 706                 else
 707                         y5 = ((((beta * tmp - 64) >> 6) +
 708                                (1 << order1_5x)) / (1 << order1_5x));
 709
 710                 y5 = (y5 * tmp) / (1 << order1_5x);
 711                 y5 = (y5 * tmp) / (1 << order1_5x);
 712                 y5 = (y5 * tmp) / (1 << order1_5x);
 713                 y5 = (y5 * tmp) / (1 << order1_5x);
 714                 y5 = y5 / (1 << order1_5x_rem);
 715
 716                 if (beta > 0)
 717                         y3 = (alpha * tmp -
 718                               (1 << order2_3x)) / (1 << order2_3x);
 719                 else
 720                         y3 = (alpha * tmp +
 721                               (1 << order2_3x)) / (1 << order2_3x);
 722                 y3 = (y3 * tmp) / (1 << order2_3x);
 723                 y3 = (y3 * tmp) / (1 << order2_3x);
 724                 y3 = y3 / (1 << order2_3x_rem);
 725
 726                 if (i < 4) {
 727                         PA_angle = 0;
 728                 } else {
 729                         PA_angle = y5 + y3;
 730                         if (PA_angle < -150)
 731                                 PA_angle = -150;
 732                         else if (PA_angle > 150)
 733                                 PA_angle = 150;
 734                 }
 735
 736                 pa_table[i] = ((PA_in[i] & 0x7ff) << 11) + (PA_angle & 0x7ff);
 737                 if (i == 5) {
 738                         PA_angle = (PA_angle + 2) >> 1;
 739                         pa_table[i - 1] = ((PA_in[i - 1] & 0x7ff) << 11) +
 740                             (PA_angle & 0x7ff);
 741                 }
 742         }
 743
 744         *gain = G_fxp;
 745         return true;
 746 }
 747
 748 void ar9003_paprd_populate_single_table(struct ath_hw *ah,
 749                                         struct ath9k_hw_cal_data *caldata,
 750                                         int chain)
 751 {
 752         u32 *paprd_table_val = caldata->pa_table[chain];
 753         u32 small_signal_gain = caldata->small_signal_gain[chain];
 754         u32 training_power = ah->paprd_training_power;
 755         u32 reg = 0;
 756         int i;
 757
 758         if (chain == 0)
 759                 reg = AR_PHY_PAPRD_MEM_TAB_B0;
 760         else if (chain == 1)
 761                 reg = AR_PHY_PAPRD_MEM_TAB_B1;
 762         else if (chain == 2)
 763                 reg = AR_PHY_PAPRD_MEM_TAB_B2;
 764
 765         for (i = 0; i < PAPRD_TABLE_SZ; i++) {
 766                 REG_WRITE(ah, reg, paprd_table_val[i]);
 767                 reg = reg + 4;
 768         }
 769
 770         if (chain == 0)
 771                 reg = AR_PHY_PA_GAIN123_B0;
 772         else if (chain == 1)
 773                 reg = AR_PHY_PA_GAIN123_B1;
 774         else
 775                 reg = AR_PHY_PA_GAIN123_B2;
 776
 777         REG_RMW_FIELD(ah, reg, AR_PHY_PA_GAIN123_PA_GAIN1, small_signal_gain);
 778
 779         REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL1_B0,
 780                       AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL,
 781                       training_power);
 782
 783         if (ah->caps.tx_chainmask & BIT(1))
 784                 REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL1_B1,
 785                               AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL,
 786                               training_power);
 787
 788         if (ah->caps.tx_chainmask & BIT(2))
 789                 /* val AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL correct? */
 790                 REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL1_B2,
 791                               AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL,
 792                               training_power);
 793 }
 794 EXPORT_SYMBOL(ar9003_paprd_populate_single_table);
 795
 796 void ar9003_paprd_setup_gain_table(struct ath_hw *ah, int chain)
 797 {
 798         unsigned int i, desired_gain, gain_index;
 799         unsigned int train_power = ah->paprd_training_power;
 800
 801         desired_gain = ar9003_get_desired_gain(ah, chain, train_power);
 802
 803         gain_index = 0;
 804         for (i = 0; i < PAPRD_GAIN_TABLE_ENTRIES; i++) {
 805                 if (ah->paprd_gain_table_index[i] >= desired_gain)
 806                         break;
 807                 gain_index++;
 808         }
 809
 810         ar9003_tx_force_gain(ah, gain_index);
 811
 812         REG_CLR_BIT(ah, AR_PHY_PAPRD_TRAINER_STAT1,
 813                         AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
 814 }
 815 EXPORT_SYMBOL(ar9003_paprd_setup_gain_table);
 816
 817 static bool ar9003_paprd_retrain_pa_in(struct ath_hw *ah,
 818                                        struct ath9k_hw_cal_data *caldata,
 819                                        int chain)
 820 {
 821         u32 *pa_in = caldata->pa_table[chain];
 822         int capdiv_offset, quick_drop_offset;
 823         int capdiv2g, quick_drop;
 824         int count = 0;
 825         int i;
 826
 827         if (!AR_SREV_9485(ah) && !AR_SREV_9330(ah))
 828                 return false;
 829
 830         capdiv2g = REG_READ_FIELD(ah, AR_PHY_65NM_CH0_TXRF3,
 831                                   AR_PHY_65NM_CH0_TXRF3_CAPDIV2G);
 832
 833         quick_drop = REG_READ_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
 834                                     AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_QUICK_DROP);
 835
 836         if (quick_drop)
 837                 quick_drop -= 0x40;
 838
 839         for (i = 0; i < NUM_BIN + 1; i++) {
 840                 if (pa_in[i] == 1400)
 841                         count++;
 842         }
 843
 844         if (AR_SREV_9485(ah)) {
 845                 if (pa_in[23] < 800) {
 846                         capdiv_offset = (int)((1000 - pa_in[23] + 75) / 150);
 847                         capdiv2g += capdiv_offset;
 848                         if (capdiv2g > 7) {
 849                                 capdiv2g = 7;
 850                                 if (pa_in[23] < 600) {
 851                                         quick_drop++;
 852                                         if (quick_drop > 0)
 853                                                 quick_drop = 0;
 854                                 }
 855                         }
 856                 } else if (pa_in[23] == 1400) {
 857                         quick_drop_offset = min_t(int, count / 3, 2);
 858                         quick_drop += quick_drop_offset;
 859                         capdiv2g += quick_drop_offset / 2;
 860
 861                         if (capdiv2g > 7)
 862                                 capdiv2g = 7;
 863
 864                         if (quick_drop > 0) {
 865                                 quick_drop = 0;
 866                                 capdiv2g -= quick_drop_offset;
 867                                 if (capdiv2g < 0)
 868                                         capdiv2g = 0;
 869                         }
 870                 } else {
 871                         return false;
 872                 }
 873         } else if (AR_SREV_9330(ah)) {
 874                 if (pa_in[23] < 1000) {
 875                         capdiv_offset = (1000 - pa_in[23]) / 100;
 876                         capdiv2g += capdiv_offset;
 877                         if (capdiv_offset > 3) {
 878                                 capdiv_offset = 1;
 879                                 quick_drop--;
 880                         }
 881
 882                         capdiv2g += capdiv_offset;
 883                         if (capdiv2g > 6)
 884                                 capdiv2g = 6;
 885                         if (quick_drop < -4)
 886                                 quick_drop = -4;
 887                 } else if (pa_in[23] == 1400) {
 888                         if (count > 3) {
 889                                 quick_drop++;
 890                                 capdiv2g -= count / 4;
 891                                 if (quick_drop > -2)
 892                                         quick_drop = -2;
 893                         } else {
 894                                 capdiv2g--;
 895                         }
 896
 897                         if (capdiv2g < 0)
 898                                 capdiv2g = 0;
 899                 } else {
 900                         return false;
 901                 }
 902         }
 903
 904         REG_RMW_FIELD(ah, AR_PHY_65NM_CH0_TXRF3,
 905                       AR_PHY_65NM_CH0_TXRF3_CAPDIV2G, capdiv2g);
 906         REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
 907                       AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_QUICK_DROP,
 908                       quick_drop);
 909
 910         return true;
 911 }
 912
 913 int ar9003_paprd_create_curve(struct ath_hw *ah,
 914                               struct ath9k_hw_cal_data *caldata, int chain)
 915 {
 916         u16 *small_signal_gain = &caldata->small_signal_gain[chain];
 917         u32 *pa_table = caldata->pa_table[chain];
 918         u32 *data_L, *data_U;
 919         int i, status = 0;
 920         u32 *buf;
 921         u32 reg;
 922
 923         memset(caldata->pa_table[chain], 0, sizeof(caldata->pa_table[chain]));
 924
 925         buf = kmalloc(2 * 48 * sizeof(u32), GFP_KERNEL);
 926         if (!buf)
 927                 return -ENOMEM;
 928
 929         data_L = &buf[0];
 930         data_U = &buf[48];
 931
 932         REG_CLR_BIT(ah, AR_PHY_CHAN_INFO_MEMORY,
 933                     AR_PHY_CHAN_INFO_MEMORY_CHANINFOMEM_S2_READ);
 934
 935         reg = AR_PHY_CHAN_INFO_TAB_0;
 936         for (i = 0; i < 48; i++)
 937                 data_L[i] = REG_READ(ah, reg + (i << 2));
 938
 939         REG_SET_BIT(ah, AR_PHY_CHAN_INFO_MEMORY,
 940                     AR_PHY_CHAN_INFO_MEMORY_CHANINFOMEM_S2_READ);
 941
 942         for (i = 0; i < 48; i++)
 943                 data_U[i] = REG_READ(ah, reg + (i << 2));
 944
 945         if (!create_pa_curve(data_L, data_U, pa_table, small_signal_gain))
 946                 status = -2;
 947
 948         if (ar9003_paprd_retrain_pa_in(ah, caldata, chain))
 949                 status = -EINPROGRESS;
 950
 951         REG_CLR_BIT(ah, AR_PHY_PAPRD_TRAINER_STAT1,
 952                     AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
 953
 954         kfree(buf);
 955
 956         return status;
 957 }
 958 EXPORT_SYMBOL(ar9003_paprd_create_curve);
 959
 960 int ar9003_paprd_init_table(struct ath_hw *ah)
 961 {
 962         int ret;
 963
 964         ret = ar9003_paprd_setup_single_table(ah);
 965         if (ret < 0)
 966             return ret;
 967
 968         ar9003_paprd_get_gain_table(ah);
 969         return 0;
 970 }
 971 EXPORT_SYMBOL(ar9003_paprd_init_table);
 972
 973 bool ar9003_paprd_is_done(struct ath_hw *ah)
 974 {
 975         int paprd_done, agc2_pwr;
 976
 977         paprd_done = REG_READ_FIELD(ah, AR_PHY_PAPRD_TRAINER_STAT1,
 978                                 AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
 979
 980         if (AR_SREV_9485(ah))
 981                 goto exit;
 982
 983         if (paprd_done == 0x1) {
 984                 agc2_pwr = REG_READ_FIELD(ah, AR_PHY_PAPRD_TRAINER_STAT1,
 985                                 AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_AGC2_PWR);
 986
 987                 ath_dbg(ath9k_hw_common(ah), CALIBRATE,
 988                         "AGC2_PWR = 0x%x training done = 0x%x\n",
 989                         agc2_pwr, paprd_done);
 990         /*
 991          * agc2_pwr range should not be less than 'IDEAL_AGC2_PWR_CHANGE'
 992          * when the training is completely done, otherwise retraining is
 993          * done to make sure the value is in ideal range
 994          */
 995                 if (agc2_pwr <= PAPRD_IDEAL_AGC2_PWR_RANGE)
 996                         paprd_done = 0;
 997         }
 998 exit:
 999         return !!paprd_done;
1000 }
1001 EXPORT_SYMBOL(ar9003_paprd_is_done);
1002
1003 bool ar9003_is_paprd_enabled(struct ath_hw *ah)
1004 {
1005         if ((ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->config.enable_paprd)
1006                 return true;
1007
1008         return false;
1009 }
1010 EXPORT_SYMBOL(ar9003_is_paprd_enabled);