linux/drivers/net/wireless/ath/ath9k/ar9003_aic.c
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   1/*
   2 * Copyright (c) 2015 Qualcomm Atheros Inc.
   3 *
   4 * Permission to use, copy, modify, and/or distribute this software for any
   5 * purpose with or without fee is hereby granted, provided that the above
   6 * copyright notice and this permission notice appear in all copies.
   7 *
   8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15 */
  16
  17#include "hw.h"
  18#include "hw-ops.h"
  19#include "ar9003_mci.h"
  20#include "ar9003_aic.h"
  21#include "ar9003_phy.h"
  22#include "reg_aic.h"
  23
  24static const u8 com_att_db_table[ATH_AIC_MAX_COM_ATT_DB_TABLE] = {
  25        0, 3, 9, 15, 21, 27
  26};
  27
  28static const u16 aic_lin_table[ATH_AIC_MAX_AIC_LIN_TABLE] = {
  29        8191, 7300, 6506, 5799, 5168, 4606, 4105, 3659,
  30        3261, 2906, 2590, 2309, 2057, 1834, 1634, 1457,
  31        1298, 1157, 1031, 919,  819,  730,  651,  580,
  32        517,  461,  411,  366,  326,  291,  259,  231,
  33        206,  183,  163,  146,  130,  116,  103,  92,
  34        82,   73,   65,   58,   52,   46,   41,   37,
  35        33,   29,   26,   23,   21,   18,   16,   15,
  36        13,   12,   10,   9,    8,    7,    7,    6,
  37        5,    5,    4,    4,    3
  38};
  39
  40static bool ar9003_hw_is_aic_enabled(struct ath_hw *ah)
  41{
  42        struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
  43
  44        /*
  45         * Disable AIC for now, until we have all the
  46         * HW code and the driver-layer support ready.
  47         */
  48        return false;
  49
  50        if (mci_hw->config & ATH_MCI_CONFIG_DISABLE_AIC)
  51                return false;
  52
  53        return true;
  54}
  55
  56static int16_t ar9003_aic_find_valid(bool *cal_sram_valid,
  57                                     bool dir, u8 index)
  58{
  59        int16_t i;
  60
  61        if (dir) {
  62                for (i = index + 1; i < ATH_AIC_MAX_BT_CHANNEL; i++) {
  63                        if (cal_sram_valid[i])
  64                                break;
  65                }
  66        } else {
  67                for (i = index - 1; i >= 0; i--) {
  68                        if (cal_sram_valid[i])
  69                                break;
  70                }
  71        }
  72
  73        if ((i >= ATH_AIC_MAX_BT_CHANNEL) || (i < 0))
  74                i = -1;
  75
  76        return i;
  77}
  78
  79/*
  80 * type 0: aic_lin_table, 1: com_att_db_table
  81 */
  82static int16_t ar9003_aic_find_index(u8 type, int16_t value)
  83{
  84        int16_t i = -1;
  85
  86        if (type == 0) {
  87                for (i = ATH_AIC_MAX_AIC_LIN_TABLE - 1; i >= 0; i--) {
  88                        if (aic_lin_table[i] >= value)
  89                                break;
  90                }
  91        } else if (type == 1) {
  92                for (i = 0; i < ATH_AIC_MAX_COM_ATT_DB_TABLE; i++) {
  93                        if (com_att_db_table[i] > value) {
  94                                i--;
  95                                break;
  96                        }
  97                }
  98
  99                if (i >= ATH_AIC_MAX_COM_ATT_DB_TABLE)
 100                        i = -1;
 101        }
 102
 103        return i;
 104}
 105
 106static void ar9003_aic_gain_table(struct ath_hw *ah)
 107{
 108        u32 aic_atten_word[19], i;
 109
 110        /* Config LNA gain difference */
 111        REG_WRITE(ah, AR_PHY_BT_COEX_4, 0x2c200a00);
 112        REG_WRITE(ah, AR_PHY_BT_COEX_5, 0x5c4e4438);
 113
 114        /* Program gain table */
 115        aic_atten_word[0] = (0x1 & 0xf) << 14 | (0x1f & 0x1f) << 9 | (0x0 & 0xf) << 5 |
 116                (0x1f & 0x1f); /* -01 dB: 4'd1, 5'd31,  00 dB: 4'd0, 5'd31 */
 117        aic_atten_word[1] = (0x3 & 0xf) << 14 | (0x1f & 0x1f) << 9 | (0x2 & 0xf) << 5 |
 118                (0x1f & 0x1f); /* -03 dB: 4'd3, 5'd31, -02 dB: 4'd2, 5'd31 */
 119        aic_atten_word[2] = (0x5 & 0xf) << 14 | (0x1f & 0x1f) << 9 | (0x4 & 0xf) << 5 |
 120                (0x1f & 0x1f); /* -05 dB: 4'd5, 5'd31, -04 dB: 4'd4, 5'd31 */
 121        aic_atten_word[3] = (0x1 & 0xf) << 14 | (0x1e & 0x1f) << 9 | (0x0 & 0xf) << 5 |
 122                (0x1e & 0x1f); /* -07 dB: 4'd1, 5'd30, -06 dB: 4'd0, 5'd30 */
 123        aic_atten_word[4] = (0x3 & 0xf) << 14 | (0x1e & 0x1f) << 9 | (0x2 & 0xf) << 5 |
 124                (0x1e & 0x1f); /* -09 dB: 4'd3, 5'd30, -08 dB: 4'd2, 5'd30 */
 125        aic_atten_word[5] = (0x5 & 0xf) << 14 | (0x1e & 0x1f) << 9 | (0x4 & 0xf) << 5 |
 126                (0x1e & 0x1f); /* -11 dB: 4'd5, 5'd30, -10 dB: 4'd4, 5'd30 */
 127        aic_atten_word[6] = (0x1 & 0xf) << 14 | (0xf & 0x1f) << 9  | (0x0 & 0xf) << 5 |
 128                (0xf & 0x1f);  /* -13 dB: 4'd1, 5'd15, -12 dB: 4'd0, 5'd15 */
 129        aic_atten_word[7] = (0x3 & 0xf) << 14 | (0xf & 0x1f) << 9  | (0x2 & 0xf) << 5 |
 130                (0xf & 0x1f);  /* -15 dB: 4'd3, 5'd15, -14 dB: 4'd2, 5'd15 */
 131        aic_atten_word[8] = (0x5 & 0xf) << 14 | (0xf & 0x1f) << 9  | (0x4 & 0xf) << 5 |
 132                (0xf & 0x1f);  /* -17 dB: 4'd5, 5'd15, -16 dB: 4'd4, 5'd15 */
 133        aic_atten_word[9] = (0x1 & 0xf) << 14 | (0x7 & 0x1f) << 9  | (0x0 & 0xf) << 5 |
 134                (0x7 & 0x1f);  /* -19 dB: 4'd1, 5'd07, -18 dB: 4'd0, 5'd07 */
 135        aic_atten_word[10] = (0x3 & 0xf) << 14 | (0x7 & 0x1f) << 9  | (0x2 & 0xf) << 5 |
 136                (0x7 & 0x1f);  /* -21 dB: 4'd3, 5'd07, -20 dB: 4'd2, 5'd07 */
 137        aic_atten_word[11] = (0x5 & 0xf) << 14 | (0x7 & 0x1f) << 9  | (0x4 & 0xf) << 5 |
 138                (0x7 & 0x1f);  /* -23 dB: 4'd5, 5'd07, -22 dB: 4'd4, 5'd07 */
 139        aic_atten_word[12] = (0x7 & 0xf) << 14 | (0x7 & 0x1f) << 9  | (0x6 & 0xf) << 5 |
 140                (0x7 & 0x1f);  /* -25 dB: 4'd7, 5'd07, -24 dB: 4'd6, 5'd07 */
 141        aic_atten_word[13] = (0x3 & 0xf) << 14 | (0x3 & 0x1f) << 9  | (0x2 & 0xf) << 5 |
 142                (0x3 & 0x1f);  /* -27 dB: 4'd3, 5'd03, -26 dB: 4'd2, 5'd03 */
 143        aic_atten_word[14] = (0x5 & 0xf) << 14 | (0x3 & 0x1f) << 9  | (0x4 & 0xf) << 5 |
 144                (0x3 & 0x1f);  /* -29 dB: 4'd5, 5'd03, -28 dB: 4'd4, 5'd03 */
 145        aic_atten_word[15] = (0x1 & 0xf) << 14 | (0x1 & 0x1f) << 9  | (0x0 & 0xf) << 5 |
 146                (0x1 & 0x1f);  /* -31 dB: 4'd1, 5'd01, -30 dB: 4'd0, 5'd01 */
 147        aic_atten_word[16] = (0x3 & 0xf) << 14 | (0x1 & 0x1f) << 9  | (0x2 & 0xf) << 5 |
 148                (0x1 & 0x1f);  /* -33 dB: 4'd3, 5'd01, -32 dB: 4'd2, 5'd01 */
 149        aic_atten_word[17] = (0x5 & 0xf) << 14 | (0x1 & 0x1f) << 9  | (0x4 & 0xf) << 5 |
 150                (0x1 & 0x1f);  /* -35 dB: 4'd5, 5'd01, -34 dB: 4'd4, 5'd01 */
 151        aic_atten_word[18] = (0x7 & 0xf) << 14 | (0x1 & 0x1f) << 9  | (0x6 & 0xf) << 5 |
 152                (0x1 & 0x1f);  /* -37 dB: 4'd7, 5'd01, -36 dB: 4'd6, 5'd01 */
 153
 154        /* Write to Gain table with auto increment enabled. */
 155        REG_WRITE(ah, (AR_PHY_AIC_SRAM_ADDR_B0 + 0x3000),
 156                  (ATH_AIC_SRAM_AUTO_INCREMENT |
 157                   ATH_AIC_SRAM_GAIN_TABLE_OFFSET));
 158
 159        for (i = 0; i < 19; i++) {
 160                REG_WRITE(ah, (AR_PHY_AIC_SRAM_DATA_B0 + 0x3000),
 161                          aic_atten_word[i]);
 162        }
 163}
 164
 165static u8 ar9003_aic_cal_start(struct ath_hw *ah, u8 min_valid_count)
 166{
 167        struct ath9k_hw_aic *aic = &ah->btcoex_hw.aic;
 168        int i;
 169
 170        /* Write to Gain table with auto increment enabled. */
 171        REG_WRITE(ah, (AR_PHY_AIC_SRAM_ADDR_B0 + 0x3000),
 172                  (ATH_AIC_SRAM_AUTO_INCREMENT |
 173                   ATH_AIC_SRAM_CAL_OFFSET));
 174
 175        for (i = 0; i < ATH_AIC_MAX_BT_CHANNEL; i++) {
 176                REG_WRITE(ah, (AR_PHY_AIC_SRAM_DATA_B0 + 0x3000), 0);
 177                aic->aic_sram[i] = 0;
 178        }
 179
 180        REG_WRITE(ah, AR_PHY_AIC_CTRL_0_B0,
 181                  (SM(0, AR_PHY_AIC_MON_ENABLE) |
 182                   SM(127, AR_PHY_AIC_CAL_MAX_HOP_COUNT) |
 183                   SM(min_valid_count, AR_PHY_AIC_CAL_MIN_VALID_COUNT) |
 184                   SM(37, AR_PHY_AIC_F_WLAN) |
 185                   SM(1, AR_PHY_AIC_CAL_CH_VALID_RESET) |
 186                   SM(0, AR_PHY_AIC_CAL_ENABLE) |
 187                   SM(0x40, AR_PHY_AIC_BTTX_PWR_THR) |
 188                   SM(0, AR_PHY_AIC_ENABLE)));
 189
 190        REG_WRITE(ah, AR_PHY_AIC_CTRL_0_B1,
 191                  (SM(0, AR_PHY_AIC_MON_ENABLE) |
 192                   SM(1, AR_PHY_AIC_CAL_CH_VALID_RESET) |
 193                   SM(0, AR_PHY_AIC_CAL_ENABLE) |
 194                   SM(0x40, AR_PHY_AIC_BTTX_PWR_THR) |
 195                   SM(0, AR_PHY_AIC_ENABLE)));
 196
 197        REG_WRITE(ah, AR_PHY_AIC_CTRL_1_B0,
 198                  (SM(8, AR_PHY_AIC_CAL_BT_REF_DELAY) |
 199                   SM(0, AR_PHY_AIC_BT_IDLE_CFG) |
 200                   SM(1, AR_PHY_AIC_STDBY_COND) |
 201                   SM(37, AR_PHY_AIC_STDBY_ROT_ATT_DB) |
 202                   SM(5, AR_PHY_AIC_STDBY_COM_ATT_DB) |
 203                   SM(15, AR_PHY_AIC_RSSI_MAX) |
 204                   SM(0, AR_PHY_AIC_RSSI_MIN)));
 205
 206        REG_WRITE(ah, AR_PHY_AIC_CTRL_1_B1,
 207                  (SM(15, AR_PHY_AIC_RSSI_MAX) |
 208                   SM(0, AR_PHY_AIC_RSSI_MIN)));
 209
 210        REG_WRITE(ah, AR_PHY_AIC_CTRL_2_B0,
 211                  (SM(44, AR_PHY_AIC_RADIO_DELAY) |
 212                   SM(8, AR_PHY_AIC_CAL_STEP_SIZE_CORR) |
 213                   SM(12, AR_PHY_AIC_CAL_ROT_IDX_CORR) |
 214                   SM(2, AR_PHY_AIC_CAL_CONV_CHECK_FACTOR) |
 215                   SM(5, AR_PHY_AIC_ROT_IDX_COUNT_MAX) |
 216                   SM(0, AR_PHY_AIC_CAL_SYNTH_TOGGLE) |
 217                   SM(0, AR_PHY_AIC_CAL_SYNTH_AFTER_BTRX) |
 218                   SM(200, AR_PHY_AIC_CAL_SYNTH_SETTLING)));
 219
 220        REG_WRITE(ah, AR_PHY_AIC_CTRL_3_B0,
 221                  (SM(2, AR_PHY_AIC_MON_MAX_HOP_COUNT) |
 222                   SM(1, AR_PHY_AIC_MON_MIN_STALE_COUNT) |
 223                   SM(1, AR_PHY_AIC_MON_PWR_EST_LONG) |
 224                   SM(2, AR_PHY_AIC_MON_PD_TALLY_SCALING) |
 225                   SM(10, AR_PHY_AIC_MON_PERF_THR) |
 226                   SM(2, AR_PHY_AIC_CAL_TARGET_MAG_SETTING) |
 227                   SM(1, AR_PHY_AIC_CAL_PERF_CHECK_FACTOR) |
 228                   SM(1, AR_PHY_AIC_CAL_PWR_EST_LONG)));
 229
 230        REG_WRITE(ah, AR_PHY_AIC_CTRL_4_B0,
 231                  (SM(2, AR_PHY_AIC_CAL_ROT_ATT_DB_EST_ISO) |
 232                   SM(3, AR_PHY_AIC_CAL_COM_ATT_DB_EST_ISO) |
 233                   SM(0, AR_PHY_AIC_CAL_ISO_EST_INIT_SETTING) |
 234                   SM(2, AR_PHY_AIC_CAL_COM_ATT_DB_BACKOFF) |
 235                   SM(1, AR_PHY_AIC_CAL_COM_ATT_DB_FIXED)));
 236
 237        REG_WRITE(ah, AR_PHY_AIC_CTRL_4_B1,
 238                  (SM(2, AR_PHY_AIC_CAL_ROT_ATT_DB_EST_ISO) |
 239                   SM(3, AR_PHY_AIC_CAL_COM_ATT_DB_EST_ISO) |
 240                   SM(0, AR_PHY_AIC_CAL_ISO_EST_INIT_SETTING) |
 241                   SM(2, AR_PHY_AIC_CAL_COM_ATT_DB_BACKOFF) |
 242                   SM(1, AR_PHY_AIC_CAL_COM_ATT_DB_FIXED)));
 243
 244        ar9003_aic_gain_table(ah);
 245
 246        /* Need to enable AIC reference signal in BT modem. */
 247        REG_WRITE(ah, ATH_AIC_BT_JUPITER_CTRL,
 248                  (REG_READ(ah, ATH_AIC_BT_JUPITER_CTRL) |
 249                   ATH_AIC_BT_AIC_ENABLE));
 250
 251        aic->aic_cal_start_time = REG_READ(ah, AR_TSF_L32);
 252
 253        /* Start calibration */
 254        REG_CLR_BIT(ah, AR_PHY_AIC_CTRL_0_B1, AR_PHY_AIC_CAL_ENABLE);
 255        REG_SET_BIT(ah, AR_PHY_AIC_CTRL_0_B1, AR_PHY_AIC_CAL_CH_VALID_RESET);
 256        REG_SET_BIT(ah, AR_PHY_AIC_CTRL_0_B1, AR_PHY_AIC_CAL_ENABLE);
 257
 258        aic->aic_caled_chan = 0;
 259        aic->aic_cal_state = AIC_CAL_STATE_STARTED;
 260
 261        return aic->aic_cal_state;
 262}
 263
 264static bool ar9003_aic_cal_post_process(struct ath_hw *ah)
 265{
 266        struct ath9k_hw_aic *aic = &ah->btcoex_hw.aic;
 267        bool cal_sram_valid[ATH_AIC_MAX_BT_CHANNEL];
 268        struct ath_aic_out_info aic_sram[ATH_AIC_MAX_BT_CHANNEL];
 269        u32 dir_path_gain_idx, quad_path_gain_idx, value;
 270        u32 fixed_com_att_db;
 271        int8_t dir_path_sign, quad_path_sign;
 272        int16_t i;
 273        bool ret = true;
 274
 275        memset(&cal_sram_valid, 0, sizeof(cal_sram_valid));
 276        memset(&aic_sram, 0, sizeof(aic_sram));
 277
 278        for (i = 0; i < ATH_AIC_MAX_BT_CHANNEL; i++) {
 279                struct ath_aic_sram_info sram;
 280                value = aic->aic_sram[i];
 281
 282                cal_sram_valid[i] = sram.valid =
 283                        MS(value, AR_PHY_AIC_SRAM_VALID);
 284                sram.rot_quad_att_db =
 285                        MS(value, AR_PHY_AIC_SRAM_ROT_QUAD_ATT_DB);
 286                sram.vga_quad_sign =
 287                        MS(value, AR_PHY_AIC_SRAM_VGA_QUAD_SIGN);
 288                sram.rot_dir_att_db =
 289                        MS(value, AR_PHY_AIC_SRAM_ROT_DIR_ATT_DB);
 290                sram.vga_dir_sign =
 291                        MS(value, AR_PHY_AIC_SRAM_VGA_DIR_SIGN);
 292                sram.com_att_6db =
 293                        MS(value, AR_PHY_AIC_SRAM_COM_ATT_6DB);
 294
 295                if (sram.valid) {
 296                        dir_path_gain_idx = sram.rot_dir_att_db +
 297                                com_att_db_table[sram.com_att_6db];
 298                        quad_path_gain_idx = sram.rot_quad_att_db +
 299                                com_att_db_table[sram.com_att_6db];
 300
 301                        dir_path_sign = (sram.vga_dir_sign) ? 1 : -1;
 302                        quad_path_sign = (sram.vga_quad_sign) ? 1 : -1;
 303
 304                        aic_sram[i].dir_path_gain_lin = dir_path_sign *
 305                                aic_lin_table[dir_path_gain_idx];
 306                        aic_sram[i].quad_path_gain_lin = quad_path_sign *
 307                                aic_lin_table[quad_path_gain_idx];
 308                }
 309        }
 310
 311        for (i = 0; i < ATH_AIC_MAX_BT_CHANNEL; i++) {
 312                int16_t start_idx, end_idx;
 313
 314                if (cal_sram_valid[i])
 315                        continue;
 316
 317                start_idx = ar9003_aic_find_valid(cal_sram_valid, 0, i);
 318                end_idx = ar9003_aic_find_valid(cal_sram_valid, 1, i);
 319
 320                if (start_idx < 0) {
 321                        /* extrapolation */
 322                        start_idx = end_idx;
 323                        end_idx = ar9003_aic_find_valid(cal_sram_valid, 1, start_idx);
 324
 325                        if (end_idx < 0) {
 326                                ret = false;
 327                                break;
 328                        }
 329
 330                        aic_sram[i].dir_path_gain_lin =
 331                                ((aic_sram[start_idx].dir_path_gain_lin -
 332                                  aic_sram[end_idx].dir_path_gain_lin) *
 333                                 (start_idx - i) + ((end_idx - i) >> 1)) /
 334                                (end_idx - i) +
 335                                aic_sram[start_idx].dir_path_gain_lin;
 336                        aic_sram[i].quad_path_gain_lin =
 337                                ((aic_sram[start_idx].quad_path_gain_lin -
 338                                  aic_sram[end_idx].quad_path_gain_lin) *
 339                                 (start_idx - i) + ((end_idx - i) >> 1)) /
 340                                (end_idx - i) +
 341                                aic_sram[start_idx].quad_path_gain_lin;
 342                }
 343
 344                if (end_idx < 0) {
 345                        /* extrapolation */
 346                        end_idx = ar9003_aic_find_valid(cal_sram_valid, 0, start_idx);
 347
 348                        if (end_idx < 0) {
 349                                ret = false;
 350                                break;
 351                        }
 352
 353                        aic_sram[i].dir_path_gain_lin =
 354                                ((aic_sram[start_idx].dir_path_gain_lin -
 355                                  aic_sram[end_idx].dir_path_gain_lin) *
 356                                 (i - start_idx) + ((start_idx - end_idx) >> 1)) /
 357                                (start_idx - end_idx) +
 358                                aic_sram[start_idx].dir_path_gain_lin;
 359                        aic_sram[i].quad_path_gain_lin =
 360                                ((aic_sram[start_idx].quad_path_gain_lin -
 361                                  aic_sram[end_idx].quad_path_gain_lin) *
 362                                 (i - start_idx) + ((start_idx - end_idx) >> 1)) /
 363                                (start_idx - end_idx) +
 364                                aic_sram[start_idx].quad_path_gain_lin;
 365
 366                } else if (start_idx >= 0){
 367                        /* interpolation */
 368                        aic_sram[i].dir_path_gain_lin =
 369                                (((end_idx - i) * aic_sram[start_idx].dir_path_gain_lin) +
 370                                 ((i - start_idx) * aic_sram[end_idx].dir_path_gain_lin) +
 371                                 ((end_idx - start_idx) >> 1)) /
 372                                (end_idx - start_idx);
 373                        aic_sram[i].quad_path_gain_lin =
 374                                (((end_idx - i) * aic_sram[start_idx].quad_path_gain_lin) +
 375                                 ((i - start_idx) * aic_sram[end_idx].quad_path_gain_lin) +
 376                                 ((end_idx - start_idx) >> 1))/
 377                                (end_idx - start_idx);
 378                }
 379        }
 380
 381        /* From dir/quad_path_gain_lin to sram. */
 382        i = ar9003_aic_find_valid(cal_sram_valid, 1, 0);
 383        if (i < 0) {
 384                i = 0;
 385                ret = false;
 386        }
 387        fixed_com_att_db = com_att_db_table[MS(aic->aic_sram[i],
 388                                            AR_PHY_AIC_SRAM_COM_ATT_6DB)];
 389
 390        for (i = 0; i < ATH_AIC_MAX_BT_CHANNEL; i++) {
 391                int16_t rot_dir_path_att_db, rot_quad_path_att_db;
 392                struct ath_aic_sram_info sram;
 393
 394                sram.vga_dir_sign =
 395                        (aic_sram[i].dir_path_gain_lin >= 0) ? 1 : 0;
 396                sram.vga_quad_sign =
 397                        (aic_sram[i].quad_path_gain_lin >= 0) ? 1 : 0;
 398
 399                rot_dir_path_att_db =
 400                        ar9003_aic_find_index(0, abs(aic_sram[i].dir_path_gain_lin)) -
 401                        fixed_com_att_db;
 402                rot_quad_path_att_db =
 403                        ar9003_aic_find_index(0, abs(aic_sram[i].quad_path_gain_lin)) -
 404                        fixed_com_att_db;
 405
 406                sram.com_att_6db =
 407                        ar9003_aic_find_index(1, fixed_com_att_db);
 408
 409                sram.valid = true;
 410
 411                sram.rot_dir_att_db =
 412                        min(max(rot_dir_path_att_db,
 413                                (int16_t)ATH_AIC_MIN_ROT_DIR_ATT_DB),
 414                            ATH_AIC_MAX_ROT_DIR_ATT_DB);
 415                sram.rot_quad_att_db =
 416                        min(max(rot_quad_path_att_db,
 417                                (int16_t)ATH_AIC_MIN_ROT_QUAD_ATT_DB),
 418                            ATH_AIC_MAX_ROT_QUAD_ATT_DB);
 419
 420                aic->aic_sram[i] = (SM(sram.vga_dir_sign,
 421                                       AR_PHY_AIC_SRAM_VGA_DIR_SIGN) |
 422                                    SM(sram.vga_quad_sign,
 423                                       AR_PHY_AIC_SRAM_VGA_QUAD_SIGN) |
 424                                    SM(sram.com_att_6db,
 425                                       AR_PHY_AIC_SRAM_COM_ATT_6DB) |
 426                                    SM(sram.valid,
 427                                       AR_PHY_AIC_SRAM_VALID) |
 428                                    SM(sram.rot_dir_att_db,
 429                                       AR_PHY_AIC_SRAM_ROT_DIR_ATT_DB) |
 430                                    SM(sram.rot_quad_att_db,
 431                                       AR_PHY_AIC_SRAM_ROT_QUAD_ATT_DB));
 432        }
 433
 434        return ret;
 435}
 436
 437static void ar9003_aic_cal_done(struct ath_hw *ah)
 438{
 439        struct ath9k_hw_aic *aic = &ah->btcoex_hw.aic;
 440
 441        /* Disable AIC reference signal in BT modem. */
 442        REG_WRITE(ah, ATH_AIC_BT_JUPITER_CTRL,
 443                  (REG_READ(ah, ATH_AIC_BT_JUPITER_CTRL) &
 444                   ~ATH_AIC_BT_AIC_ENABLE));
 445
 446        if (ar9003_aic_cal_post_process(ah))
 447                aic->aic_cal_state = AIC_CAL_STATE_DONE;
 448        else
 449                aic->aic_cal_state = AIC_CAL_STATE_ERROR;
 450}
 451
 452static u8 ar9003_aic_cal_continue(struct ath_hw *ah, bool cal_once)
 453{
 454        struct ath_common *common = ath9k_hw_common(ah);
 455        struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
 456        struct ath9k_hw_aic *aic = &ah->btcoex_hw.aic;
 457        int i, num_chan;
 458
 459        num_chan = MS(mci_hw->config, ATH_MCI_CONFIG_AIC_CAL_NUM_CHAN);
 460
 461        if (!num_chan) {
 462                aic->aic_cal_state = AIC_CAL_STATE_ERROR;
 463                return aic->aic_cal_state;
 464        }
 465
 466        if (cal_once) {
 467                for (i = 0; i < 10000; i++) {
 468                        if ((REG_READ(ah, AR_PHY_AIC_CTRL_0_B1) &
 469                             AR_PHY_AIC_CAL_ENABLE) == 0)
 470                                break;
 471
 472                        udelay(100);
 473                }
 474        }
 475
 476        /*
 477         * Use AR_PHY_AIC_CAL_ENABLE bit instead of AR_PHY_AIC_CAL_DONE.
 478         * Sometimes CAL_DONE bit is not asserted.
 479         */
 480        if ((REG_READ(ah, AR_PHY_AIC_CTRL_0_B1) &
 481             AR_PHY_AIC_CAL_ENABLE) != 0) {
 482                ath_dbg(common, MCI, "AIC cal is not done after 40ms");
 483                goto exit;
 484        }
 485
 486        REG_WRITE(ah, AR_PHY_AIC_SRAM_ADDR_B1,
 487                  (ATH_AIC_SRAM_CAL_OFFSET | ATH_AIC_SRAM_AUTO_INCREMENT));
 488
 489        for (i = 0; i < ATH_AIC_MAX_BT_CHANNEL; i++) {
 490                u32 value;
 491
 492                value = REG_READ(ah, AR_PHY_AIC_SRAM_DATA_B1);
 493
 494                if (value & 0x01) {
 495                        if (aic->aic_sram[i] == 0)
 496                                aic->aic_caled_chan++;
 497
 498                        aic->aic_sram[i] = value;
 499
 500                        if (!cal_once)
 501                                break;
 502                }
 503        }
 504
 505        if ((aic->aic_caled_chan >= num_chan) || cal_once) {
 506                ar9003_aic_cal_done(ah);
 507        } else {
 508                /* Start calibration */
 509                REG_CLR_BIT(ah, AR_PHY_AIC_CTRL_0_B1, AR_PHY_AIC_CAL_ENABLE);
 510                REG_SET_BIT(ah, AR_PHY_AIC_CTRL_0_B1,
 511                            AR_PHY_AIC_CAL_CH_VALID_RESET);
 512                REG_SET_BIT(ah, AR_PHY_AIC_CTRL_0_B1, AR_PHY_AIC_CAL_ENABLE);
 513        }
 514exit:
 515        return aic->aic_cal_state;
 516
 517}
 518
 519u8 ar9003_aic_calibration(struct ath_hw *ah)
 520{
 521        struct ath9k_hw_aic *aic = &ah->btcoex_hw.aic;
 522        u8 cal_ret = AIC_CAL_STATE_ERROR;
 523
 524        switch (aic->aic_cal_state) {
 525        case AIC_CAL_STATE_IDLE:
 526                cal_ret = ar9003_aic_cal_start(ah, 1);
 527                break;
 528        case AIC_CAL_STATE_STARTED:
 529                cal_ret = ar9003_aic_cal_continue(ah, false);
 530                break;
 531        case AIC_CAL_STATE_DONE:
 532                cal_ret = AIC_CAL_STATE_DONE;
 533                break;
 534        default:
 535                break;
 536        }
 537
 538        return cal_ret;
 539}
 540
 541u8 ar9003_aic_start_normal(struct ath_hw *ah)
 542{
 543        struct ath9k_hw_aic *aic = &ah->btcoex_hw.aic;
 544        int16_t i;
 545
 546        if (aic->aic_cal_state != AIC_CAL_STATE_DONE)
 547                return 1;
 548
 549        ar9003_aic_gain_table(ah);
 550
 551        REG_WRITE(ah, AR_PHY_AIC_SRAM_ADDR_B1, ATH_AIC_SRAM_AUTO_INCREMENT);
 552
 553        for (i = 0; i < ATH_AIC_MAX_BT_CHANNEL; i++) {
 554                REG_WRITE(ah, AR_PHY_AIC_SRAM_DATA_B1, aic->aic_sram[i]);
 555        }
 556
 557        /* FIXME: Replace these with proper register names */
 558        REG_WRITE(ah, 0xa6b0, 0x80);
 559        REG_WRITE(ah, 0xa6b4, 0x5b2df0);
 560        REG_WRITE(ah, 0xa6b8, 0x10762cc8);
 561        REG_WRITE(ah, 0xa6bc, 0x1219a4b);
 562        REG_WRITE(ah, 0xa6c0, 0x1e01);
 563        REG_WRITE(ah, 0xb6b4, 0xf0);
 564        REG_WRITE(ah, 0xb6c0, 0x1e01);
 565        REG_WRITE(ah, 0xb6b0, 0x81);
 566        REG_WRITE(ah, AR_PHY_65NM_CH1_RXTX4, 0x40000000);
 567
 568        aic->aic_enabled = true;
 569
 570        return 0;
 571}
 572
 573u8 ar9003_aic_cal_reset(struct ath_hw *ah)
 574{
 575        struct ath9k_hw_aic *aic = &ah->btcoex_hw.aic;
 576
 577        aic->aic_cal_state = AIC_CAL_STATE_IDLE;
 578        return aic->aic_cal_state;
 579}
 580
 581u8 ar9003_aic_calibration_single(struct ath_hw *ah)
 582{
 583        struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
 584        u8 cal_ret;
 585        int num_chan;
 586
 587        num_chan = MS(mci_hw->config, ATH_MCI_CONFIG_AIC_CAL_NUM_CHAN);
 588
 589        (void) ar9003_aic_cal_start(ah, num_chan);
 590        cal_ret = ar9003_aic_cal_continue(ah, true);
 591
 592        return cal_ret;
 593}
 594
 595void ar9003_hw_attach_aic_ops(struct ath_hw *ah)
 596{
 597        struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah);
 598
 599        priv_ops->is_aic_enabled = ar9003_hw_is_aic_enabled;
 600}
 601