From: Sujith Manoharan Date: Sat, 14 Mar 2015 05:57:52 +0000 (+0530) Subject: ath9k: Process the AIC calibration results X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=188f1a1288d59ed9ae895bdbf22d46017a8a69b8;p=linux-beck.git ath9k: Process the AIC calibration results This patch adds support for post-processing the AIC calibration results. Signed-off-by: Sujith Manoharan Signed-off-by: Kalle Valo --- diff --git a/drivers/net/wireless/ath/ath9k/ar9003_aic.c b/drivers/net/wireless/ath/ath9k/ar9003_aic.c index 00aaf4dd90e7..51ecc9b2df8c 100644 --- a/drivers/net/wireless/ath/ath9k/ar9003_aic.c +++ b/drivers/net/wireless/ath/ath9k/ar9003_aic.c @@ -20,6 +20,22 @@ #include "ar9003_aic.h" #include "reg_aic.h" +static const u8 com_att_db_table[ATH_AIC_MAX_COM_ATT_DB_TABLE] = { + 0, 3, 9, 15, 21, 27 +}; + +static const u16 aic_lin_table[ATH_AIC_MAX_AIC_LIN_TABLE] = { + 8191, 7300, 6506, 5799, 5168, 4606, 4105, 3659, + 3261, 2906, 2590, 2309, 2057, 1834, 1634, 1457, + 1298, 1157, 1031, 919, 819, 730, 651, 580, + 517, 461, 411, 366, 326, 291, 259, 231, + 206, 183, 163, 146, 130, 116, 103, 92, + 82, 73, 65, 58, 52, 46, 41, 37, + 33, 29, 26, 23, 21, 18, 16, 15, + 13, 12, 10, 9, 8, 7, 7, 6, + 5, 5, 4, 4, 3 +}; + static bool ar9003_hw_is_aic_enabled(struct ath_hw *ah) { struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci; @@ -30,6 +46,56 @@ static bool ar9003_hw_is_aic_enabled(struct ath_hw *ah) return true; } +static int16_t ar9003_aic_find_valid(struct ath_aic_sram_info *cal_sram, + bool dir, u8 index) +{ + int16_t i; + + if (dir) { + for (i = index + 1; i < ATH_AIC_MAX_BT_CHANNEL; i++) { + if (cal_sram[i].valid) + break; + } + } else { + for (i = index - 1; i >= 0; i--) { + if (cal_sram[i].valid) + break; + } + } + + if ((i >= ATH_AIC_MAX_BT_CHANNEL) || (i < 0)) + i = -1; + + return i; +} + +/* + * type 0: aic_lin_table, 1: com_att_db_table + */ +static int16_t ar9003_aic_find_index(u8 type, int16_t value) +{ + int16_t i = -1; + + if (type == 0) { + for (i = ATH_AIC_MAX_AIC_LIN_TABLE - 1; i >= 0; i--) { + if (aic_lin_table[i] >= value) + break; + } + } else if (type == 1) { + for (i = 0; i < ATH_AIC_MAX_COM_ATT_DB_TABLE; i++) { + if (com_att_db_table[i] > value) { + i--; + break; + } + } + + if (i >= ATH_AIC_MAX_COM_ATT_DB_TABLE) + i = -1; + } + + return i; +} + static void ar9003_aic_gain_table(struct ath_hw *ah) { u32 aic_atten_word[19], i; @@ -186,12 +252,191 @@ static void ar9003_aic_cal_start(struct ath_hw *ah, u8 min_valid_count) aic->aic_cal_state = AIC_CAL_STATE_STARTED; } +static bool ar9003_aic_cal_post_process(struct ath_hw *ah) +{ + struct ath9k_hw_aic *aic = &ah->btcoex_hw.aic; + struct ath_aic_sram_info cal_sram[ATH_AIC_MAX_BT_CHANNEL]; + struct ath_aic_out_info aic_sram[ATH_AIC_MAX_BT_CHANNEL]; + u32 dir_path_gain_idx, quad_path_gain_idx, value; + u32 fixed_com_att_db; + int8_t dir_path_sign, quad_path_sign; + int16_t i; + bool ret = true; + + memset(&cal_sram, 0, sizeof(cal_sram)); + memset(&aic_sram, 0, sizeof(aic_sram)); + + for (i = 0; i < ATH_AIC_MAX_BT_CHANNEL; i++) { + value = aic->aic_sram[i]; + + cal_sram[i].valid = + MS(value, AR_PHY_AIC_SRAM_VALID); + cal_sram[i].rot_quad_att_db = + MS(value, AR_PHY_AIC_SRAM_ROT_QUAD_ATT_DB); + cal_sram[i].vga_quad_sign = + MS(value, AR_PHY_AIC_SRAM_VGA_QUAD_SIGN); + cal_sram[i].rot_dir_att_db = + MS(value, AR_PHY_AIC_SRAM_ROT_DIR_ATT_DB); + cal_sram[i].vga_dir_sign = + MS(value, AR_PHY_AIC_SRAM_VGA_DIR_SIGN); + cal_sram[i].com_att_6db = + MS(value, AR_PHY_AIC_SRAM_COM_ATT_6DB); + + if (cal_sram[i].valid) { + dir_path_gain_idx = cal_sram[i].rot_dir_att_db + + com_att_db_table[cal_sram[i].com_att_6db]; + quad_path_gain_idx = cal_sram[i].rot_quad_att_db + + com_att_db_table[cal_sram[i].com_att_6db]; + + dir_path_sign = (cal_sram[i].vga_dir_sign) ? 1 : -1; + quad_path_sign = (cal_sram[i].vga_quad_sign) ? 1 : -1; + + aic_sram[i].dir_path_gain_lin = dir_path_sign * + aic_lin_table[dir_path_gain_idx]; + aic_sram[i].quad_path_gain_lin = quad_path_sign * + aic_lin_table[quad_path_gain_idx]; + } + } + + for (i = 0; i < ATH_AIC_MAX_BT_CHANNEL; i++) { + int16_t start_idx, end_idx; + + if (cal_sram[i].valid) + continue; + + start_idx = ar9003_aic_find_valid(cal_sram, 0, i); + end_idx = ar9003_aic_find_valid(cal_sram, 1, i); + + if (start_idx < 0) { + /* extrapolation */ + start_idx = end_idx; + end_idx = ar9003_aic_find_valid(cal_sram, 1, start_idx); + + if (end_idx < 0) { + ret = false; + break; + } + + aic_sram[i].dir_path_gain_lin = + ((aic_sram[start_idx].dir_path_gain_lin - + aic_sram[end_idx].dir_path_gain_lin) * + (start_idx - i) + ((end_idx - i) >> 1)) / + (end_idx - i) + + aic_sram[start_idx].dir_path_gain_lin; + aic_sram[i].quad_path_gain_lin = + ((aic_sram[start_idx].quad_path_gain_lin - + aic_sram[end_idx].quad_path_gain_lin) * + (start_idx - i) + ((end_idx - i) >> 1)) / + (end_idx - i) + + aic_sram[start_idx].quad_path_gain_lin; + } + + if (end_idx < 0) { + /* extrapolation */ + end_idx = ar9003_aic_find_valid(cal_sram, 0, start_idx); + + if (end_idx < 0) { + ret = false; + break; + } + + aic_sram[i].dir_path_gain_lin = + ((aic_sram[start_idx].dir_path_gain_lin - + aic_sram[end_idx].dir_path_gain_lin) * + (i - start_idx) + ((start_idx - end_idx) >> 1)) / + (start_idx - end_idx) + + aic_sram[start_idx].dir_path_gain_lin; + aic_sram[i].quad_path_gain_lin = + ((aic_sram[start_idx].quad_path_gain_lin - + aic_sram[end_idx].quad_path_gain_lin) * + (i - start_idx) + ((start_idx - end_idx) >> 1)) / + (start_idx - end_idx) + + aic_sram[start_idx].quad_path_gain_lin; + + } else if (start_idx >= 0){ + /* interpolation */ + aic_sram[i].dir_path_gain_lin = + (((end_idx - i) * aic_sram[start_idx].dir_path_gain_lin) + + ((i - start_idx) * aic_sram[end_idx].dir_path_gain_lin) + + ((end_idx - start_idx) >> 1)) / + (end_idx - start_idx); + aic_sram[i].quad_path_gain_lin = + (((end_idx - i) * aic_sram[start_idx].quad_path_gain_lin) + + ((i - start_idx) * aic_sram[end_idx].quad_path_gain_lin) + + ((end_idx - start_idx) >> 1))/ + (end_idx - start_idx); + } + } + + /* From dir/quad_path_gain_lin to sram. */ + i = ar9003_aic_find_valid(cal_sram, 1, 0); + if (i < 0) { + i = 0; + ret = false; + } + fixed_com_att_db = com_att_db_table[cal_sram[i].com_att_6db]; + + for (i = 0; i < ATH_AIC_MAX_BT_CHANNEL; i++) { + int16_t rot_dir_path_att_db, rot_quad_path_att_db; + + aic_sram[i].sram.vga_dir_sign = + (aic_sram[i].dir_path_gain_lin >= 0) ? 1 : 0; + aic_sram[i].sram.vga_quad_sign= + (aic_sram[i].quad_path_gain_lin >= 0) ? 1 : 0; + + rot_dir_path_att_db = + ar9003_aic_find_index(0, abs(aic_sram[i].dir_path_gain_lin)) - + fixed_com_att_db; + rot_quad_path_att_db = + ar9003_aic_find_index(0, abs(aic_sram[i].quad_path_gain_lin)) - + fixed_com_att_db; + + aic_sram[i].sram.com_att_6db = + ar9003_aic_find_index(1, fixed_com_att_db); + + aic_sram[i].sram.valid = 1; + + aic_sram[i].sram.rot_dir_att_db = + min(max(rot_dir_path_att_db, + (int16_t)ATH_AIC_MIN_ROT_DIR_ATT_DB), + ATH_AIC_MAX_ROT_DIR_ATT_DB); + aic_sram[i].sram.rot_quad_att_db = + min(max(rot_quad_path_att_db, + (int16_t)ATH_AIC_MIN_ROT_QUAD_ATT_DB), + ATH_AIC_MAX_ROT_QUAD_ATT_DB); + } + + for (i = 0; i < ATH_AIC_MAX_BT_CHANNEL; i++) { + aic->aic_sram[i] = (SM(aic_sram[i].sram.vga_dir_sign, + AR_PHY_AIC_SRAM_VGA_DIR_SIGN) | + SM(aic_sram[i].sram.vga_quad_sign, + AR_PHY_AIC_SRAM_VGA_QUAD_SIGN) | + SM(aic_sram[i].sram.com_att_6db, + AR_PHY_AIC_SRAM_COM_ATT_6DB) | + SM(aic_sram[i].sram.valid, + AR_PHY_AIC_SRAM_VALID) | + SM(aic_sram[i].sram.rot_dir_att_db, + AR_PHY_AIC_SRAM_ROT_DIR_ATT_DB) | + SM(aic_sram[i].sram.rot_quad_att_db, + AR_PHY_AIC_SRAM_ROT_QUAD_ATT_DB)); + } + + return ret; +} + static void ar9003_aic_cal_done(struct ath_hw *ah) { + struct ath9k_hw_aic *aic = &ah->btcoex_hw.aic; + /* Disable AIC reference signal in BT modem. */ REG_WRITE(ah, ATH_AIC_BT_JUPITER_CTRL, (REG_READ(ah, ATH_AIC_BT_JUPITER_CTRL) & ~ATH_AIC_BT_AIC_ENABLE)); + + if (ar9003_aic_cal_post_process(ah)) + aic->aic_cal_state = AIC_CAL_STATE_DONE; + else + aic->aic_cal_state = AIC_CAL_STATE_ERROR; } static u8 ar9003_aic_cal_continue(struct ath_hw *ah, bool cal_once)