From: Sujith Manoharan <c_manoha@xxxxxxxxxxxxxxxx>
This patch adds support for post-processing
the AIC calibration results.
Signed-off-by: Sujith Manoharan <c_manoha@xxxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/ar9003_aic.c | 245 ++++++++++++++++++++++++++++
1 file changed, 245 insertions(+)
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_aic.c b/drivers/net/wireless/ath/ath9k/ar9003_aic.c
index 00aaf4d..51ecc9b 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)
--
2.3.1
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