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ath9k: Process the AIC calibration results

Browse source 
This patch adds support for post-processing
the AIC calibration results.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Sujith Manoharan 2015-03-14 11:27:52 +05:30 committed by Kalle Valo
parent 716eed4c0d
commit 188f1a1288
1 changed files with 245 additions and 0 deletions
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245
drivers/net/wireless/ath/ath9k/ar9003_aic.c
View file

@ -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)