linux/drivers/net/wireless/ath/ath9k/ar9003_paprd.c
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   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
  21void 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}
  69EXPORT_SYMBOL(ar9003_paprd_enable);
  70
  71static 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
  98static 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
 138static 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
 291static 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
 305static 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
 370static 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
 407static inline int find_expn(int num)
 408{
 409        return fls(num) - 1;
 410}
 411
 412static 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
 419static 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
 751void 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}
 797EXPORT_SYMBOL(ar9003_paprd_populate_single_table);
 798
 799void 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}
 818EXPORT_SYMBOL(ar9003_paprd_setup_gain_table);
 819
 820static 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
 916int 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}
 961EXPORT_SYMBOL(ar9003_paprd_create_curve);
 962
 963int 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}
 974EXPORT_SYMBOL(ar9003_paprd_init_table);
 975
 976bool 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        }
1001exit:
1002        return !!paprd_done;
1003}
1004EXPORT_SYMBOL(ar9003_paprd_is_done);
1005
1006bool 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}
1013EXPORT_SYMBOL(ar9003_is_paprd_enabled);
1014