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linux/drivers/net/wireless/ath/ath9k/ar9003_aic.c
Arnd Bergmann e9a26010f6 ath9k: reduce stack usage in ar9003_aic_cal_post_process 
In some configurations, this function uses more than the warning limit
of 1024 bytes:

drivers/net/wireless/ath/ath9k/ar9003_aic.c: In function 'ar9003_aic_cal_post_process':
drivers/net/wireless/ath/ath9k/ar9003_aic.c:434:1: error: the frame size of 1040 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]

It turns out that there are two large arrays on the stack here, but
almost all the data in them is never used outside of the loop in
which it gets written, so we can replace the array with a single
instance.

The .valid flag is used later, so I'm replacing the array of structures
with an array of bools. An obvious follow-up optimization would be
to replace it with a bitmask and set_bit()/find_first_bit()/
find_last_bit()/... operations. However, I have not tested this patch,
so I sticked to the simpler transformation that does the job of
reducing the stack usage to a harmless level.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
2016-03-03 19:27:17 +02:00

601 lines
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/*
* Copyright (c) 2015 Qualcomm Atheros Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "hw.h"
#include "hw-ops.h"
#include "ar9003_mci.h"
#include "ar9003_aic.h"
#include "ar9003_phy.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;
/*
* Disable AIC for now, until we have all the
* HW code and the driver-layer support ready.
*/
return false;
if (mci_hw->config & ATH_MCI_CONFIG_DISABLE_AIC)
return false;
return true;
}
static int16_t ar9003_aic_find_valid(bool *cal_sram_valid,
bool dir, u8 index)
{
int16_t i;
if (dir) {
for (i = index + 1; i < ATH_AIC_MAX_BT_CHANNEL; i++) {
if (cal_sram_valid[i])
break;
}
} else {
for (i = index - 1; i >= 0; i--) {
if (cal_sram_valid[i])
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;
/* Config LNA gain difference */
REG_WRITE(ah, AR_PHY_BT_COEX_4, 0x2c200a00);
REG_WRITE(ah, AR_PHY_BT_COEX_5, 0x5c4e4438);
/* Program gain table */
aic_atten_word[0] = (0x1 & 0xf) << 14 | (0x1f & 0x1f) << 9 | (0x0 & 0xf) << 5 |
(0x1f & 0x1f); /* -01 dB: 4'd1, 5'd31, 00 dB: 4'd0, 5'd31 */
aic_atten_word[1] = (0x3 & 0xf) << 14 | (0x1f & 0x1f) << 9 | (0x2 & 0xf) << 5 |
(0x1f & 0x1f); /* -03 dB: 4'd3, 5'd31, -02 dB: 4'd2, 5'd31 */
aic_atten_word[2] = (0x5 & 0xf) << 14 | (0x1f & 0x1f) << 9 | (0x4 & 0xf) << 5 |
(0x1f & 0x1f); /* -05 dB: 4'd5, 5'd31, -04 dB: 4'd4, 5'd31 */
aic_atten_word[3] = (0x1 & 0xf) << 14 | (0x1e & 0x1f) << 9 | (0x0 & 0xf) << 5 |
(0x1e & 0x1f); /* -07 dB: 4'd1, 5'd30, -06 dB: 4'd0, 5'd30 */
aic_atten_word[4] = (0x3 & 0xf) << 14 | (0x1e & 0x1f) << 9 | (0x2 & 0xf) << 5 |
(0x1e & 0x1f); /* -09 dB: 4'd3, 5'd30, -08 dB: 4'd2, 5'd30 */
aic_atten_word[5] = (0x5 & 0xf) << 14 | (0x1e & 0x1f) << 9 | (0x4 & 0xf) << 5 |
(0x1e & 0x1f); /* -11 dB: 4'd5, 5'd30, -10 dB: 4'd4, 5'd30 */
aic_atten_word[6] = (0x1 & 0xf) << 14 | (0xf & 0x1f) << 9 | (0x0 & 0xf) << 5 |
(0xf & 0x1f); /* -13 dB: 4'd1, 5'd15, -12 dB: 4'd0, 5'd15 */
aic_atten_word[7] = (0x3 & 0xf) << 14 | (0xf & 0x1f) << 9 | (0x2 & 0xf) << 5 |
(0xf & 0x1f); /* -15 dB: 4'd3, 5'd15, -14 dB: 4'd2, 5'd15 */
aic_atten_word[8] = (0x5 & 0xf) << 14 | (0xf & 0x1f) << 9 | (0x4 & 0xf) << 5 |
(0xf & 0x1f); /* -17 dB: 4'd5, 5'd15, -16 dB: 4'd4, 5'd15 */
aic_atten_word[9] = (0x1 & 0xf) << 14 | (0x7 & 0x1f) << 9 | (0x0 & 0xf) << 5 |
(0x7 & 0x1f); /* -19 dB: 4'd1, 5'd07, -18 dB: 4'd0, 5'd07 */
aic_atten_word[10] = (0x3 & 0xf) << 14 | (0x7 & 0x1f) << 9 | (0x2 & 0xf) << 5 |
(0x7 & 0x1f); /* -21 dB: 4'd3, 5'd07, -20 dB: 4'd2, 5'd07 */
aic_atten_word[11] = (0x5 & 0xf) << 14 | (0x7 & 0x1f) << 9 | (0x4 & 0xf) << 5 |
(0x7 & 0x1f); /* -23 dB: 4'd5, 5'd07, -22 dB: 4'd4, 5'd07 */
aic_atten_word[12] = (0x7 & 0xf) << 14 | (0x7 & 0x1f) << 9 | (0x6 & 0xf) << 5 |
(0x7 & 0x1f); /* -25 dB: 4'd7, 5'd07, -24 dB: 4'd6, 5'd07 */
aic_atten_word[13] = (0x3 & 0xf) << 14 | (0x3 & 0x1f) << 9 | (0x2 & 0xf) << 5 |
(0x3 & 0x1f); /* -27 dB: 4'd3, 5'd03, -26 dB: 4'd2, 5'd03 */
aic_atten_word[14] = (0x5 & 0xf) << 14 | (0x3 & 0x1f) << 9 | (0x4 & 0xf) << 5 |
(0x3 & 0x1f); /* -29 dB: 4'd5, 5'd03, -28 dB: 4'd4, 5'd03 */
aic_atten_word[15] = (0x1 & 0xf) << 14 | (0x1 & 0x1f) << 9 | (0x0 & 0xf) << 5 |
(0x1 & 0x1f); /* -31 dB: 4'd1, 5'd01, -30 dB: 4'd0, 5'd01 */
aic_atten_word[16] = (0x3 & 0xf) << 14 | (0x1 & 0x1f) << 9 | (0x2 & 0xf) << 5 |
(0x1 & 0x1f); /* -33 dB: 4'd3, 5'd01, -32 dB: 4'd2, 5'd01 */
aic_atten_word[17] = (0x5 & 0xf) << 14 | (0x1 & 0x1f) << 9 | (0x4 & 0xf) << 5 |
(0x1 & 0x1f); /* -35 dB: 4'd5, 5'd01, -34 dB: 4'd4, 5'd01 */
aic_atten_word[18] = (0x7 & 0xf) << 14 | (0x1 & 0x1f) << 9 | (0x6 & 0xf) << 5 |
(0x1 & 0x1f); /* -37 dB: 4'd7, 5'd01, -36 dB: 4'd6, 5'd01 */
/* Write to Gain table with auto increment enabled. */
REG_WRITE(ah, (AR_PHY_AIC_SRAM_ADDR_B0 + 0x3000),
(ATH_AIC_SRAM_AUTO_INCREMENT |
ATH_AIC_SRAM_GAIN_TABLE_OFFSET));
for (i = 0; i < 19; i++) {
REG_WRITE(ah, (AR_PHY_AIC_SRAM_DATA_B0 + 0x3000),
aic_atten_word[i]);
}
}
static u8 ar9003_aic_cal_start(struct ath_hw *ah, u8 min_valid_count)
{
struct ath9k_hw_aic *aic = &ah->btcoex_hw.aic;
int i;
/* Write to Gain table with auto increment enabled. */
REG_WRITE(ah, (AR_PHY_AIC_SRAM_ADDR_B0 + 0x3000),
(ATH_AIC_SRAM_AUTO_INCREMENT |
ATH_AIC_SRAM_CAL_OFFSET));
for (i = 0; i < ATH_AIC_MAX_BT_CHANNEL; i++) {
REG_WRITE(ah, (AR_PHY_AIC_SRAM_DATA_B0 + 0x3000), 0);
aic->aic_sram[i] = 0;
}
REG_WRITE(ah, AR_PHY_AIC_CTRL_0_B0,
(SM(0, AR_PHY_AIC_MON_ENABLE) |
SM(127, AR_PHY_AIC_CAL_MAX_HOP_COUNT) |
SM(min_valid_count, AR_PHY_AIC_CAL_MIN_VALID_COUNT) |
SM(37, AR_PHY_AIC_F_WLAN) |
SM(1, AR_PHY_AIC_CAL_CH_VALID_RESET) |
SM(0, AR_PHY_AIC_CAL_ENABLE) |
SM(0x40, AR_PHY_AIC_BTTX_PWR_THR) |
SM(0, AR_PHY_AIC_ENABLE)));
REG_WRITE(ah, AR_PHY_AIC_CTRL_0_B1,
(SM(0, AR_PHY_AIC_MON_ENABLE) |
SM(1, AR_PHY_AIC_CAL_CH_VALID_RESET) |
SM(0, AR_PHY_AIC_CAL_ENABLE) |
SM(0x40, AR_PHY_AIC_BTTX_PWR_THR) |
SM(0, AR_PHY_AIC_ENABLE)));
REG_WRITE(ah, AR_PHY_AIC_CTRL_1_B0,
(SM(8, AR_PHY_AIC_CAL_BT_REF_DELAY) |
SM(0, AR_PHY_AIC_BT_IDLE_CFG) |
SM(1, AR_PHY_AIC_STDBY_COND) |
SM(37, AR_PHY_AIC_STDBY_ROT_ATT_DB) |
SM(5, AR_PHY_AIC_STDBY_COM_ATT_DB) |
SM(15, AR_PHY_AIC_RSSI_MAX) |
SM(0, AR_PHY_AIC_RSSI_MIN)));
REG_WRITE(ah, AR_PHY_AIC_CTRL_1_B1,
(SM(15, AR_PHY_AIC_RSSI_MAX) |
SM(0, AR_PHY_AIC_RSSI_MIN)));
REG_WRITE(ah, AR_PHY_AIC_CTRL_2_B0,
(SM(44, AR_PHY_AIC_RADIO_DELAY) |
SM(8, AR_PHY_AIC_CAL_STEP_SIZE_CORR) |
SM(12, AR_PHY_AIC_CAL_ROT_IDX_CORR) |
SM(2, AR_PHY_AIC_CAL_CONV_CHECK_FACTOR) |
SM(5, AR_PHY_AIC_ROT_IDX_COUNT_MAX) |
SM(0, AR_PHY_AIC_CAL_SYNTH_TOGGLE) |
SM(0, AR_PHY_AIC_CAL_SYNTH_AFTER_BTRX) |
SM(200, AR_PHY_AIC_CAL_SYNTH_SETTLING)));
REG_WRITE(ah, AR_PHY_AIC_CTRL_3_B0,
(SM(2, AR_PHY_AIC_MON_MAX_HOP_COUNT) |
SM(1, AR_PHY_AIC_MON_MIN_STALE_COUNT) |
SM(1, AR_PHY_AIC_MON_PWR_EST_LONG) |
SM(2, AR_PHY_AIC_MON_PD_TALLY_SCALING) |
SM(10, AR_PHY_AIC_MON_PERF_THR) |
SM(2, AR_PHY_AIC_CAL_TARGET_MAG_SETTING) |
SM(1, AR_PHY_AIC_CAL_PERF_CHECK_FACTOR) |
SM(1, AR_PHY_AIC_CAL_PWR_EST_LONG)));
REG_WRITE(ah, AR_PHY_AIC_CTRL_4_B0,
(SM(2, AR_PHY_AIC_CAL_ROT_ATT_DB_EST_ISO) |
SM(3, AR_PHY_AIC_CAL_COM_ATT_DB_EST_ISO) |
SM(0, AR_PHY_AIC_CAL_ISO_EST_INIT_SETTING) |
SM(2, AR_PHY_AIC_CAL_COM_ATT_DB_BACKOFF) |
SM(1, AR_PHY_AIC_CAL_COM_ATT_DB_FIXED)));
REG_WRITE(ah, AR_PHY_AIC_CTRL_4_B1,
(SM(2, AR_PHY_AIC_CAL_ROT_ATT_DB_EST_ISO) |
SM(3, AR_PHY_AIC_CAL_COM_ATT_DB_EST_ISO) |
SM(0, AR_PHY_AIC_CAL_ISO_EST_INIT_SETTING) |
SM(2, AR_PHY_AIC_CAL_COM_ATT_DB_BACKOFF) |
SM(1, AR_PHY_AIC_CAL_COM_ATT_DB_FIXED)));
ar9003_aic_gain_table(ah);
/* Need to enable 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));
aic->aic_cal_start_time = REG_READ(ah, AR_TSF_L32);
/* Start calibration */
REG_CLR_BIT(ah, AR_PHY_AIC_CTRL_0_B1, AR_PHY_AIC_CAL_ENABLE);
REG_SET_BIT(ah, AR_PHY_AIC_CTRL_0_B1, AR_PHY_AIC_CAL_CH_VALID_RESET);
REG_SET_BIT(ah, AR_PHY_AIC_CTRL_0_B1, AR_PHY_AIC_CAL_ENABLE);
aic->aic_caled_chan = 0;
aic->aic_cal_state = AIC_CAL_STATE_STARTED;
return aic->aic_cal_state;
}
static bool ar9003_aic_cal_post_process(struct ath_hw *ah)
{
struct ath9k_hw_aic *aic = &ah->btcoex_hw.aic;
bool cal_sram_valid[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_valid, 0, sizeof(cal_sram_valid));
memset(&aic_sram, 0, sizeof(aic_sram));
for (i = 0; i < ATH_AIC_MAX_BT_CHANNEL; i++) {
struct ath_aic_sram_info sram;
value = aic->aic_sram[i];
cal_sram_valid[i] = sram.valid =
MS(value, AR_PHY_AIC_SRAM_VALID);
sram.rot_quad_att_db =
MS(value, AR_PHY_AIC_SRAM_ROT_QUAD_ATT_DB);
sram.vga_quad_sign =
MS(value, AR_PHY_AIC_SRAM_VGA_QUAD_SIGN);
sram.rot_dir_att_db =
MS(value, AR_PHY_AIC_SRAM_ROT_DIR_ATT_DB);
sram.vga_dir_sign =
MS(value, AR_PHY_AIC_SRAM_VGA_DIR_SIGN);
sram.com_att_6db =
MS(value, AR_PHY_AIC_SRAM_COM_ATT_6DB);
if (sram.valid) {
dir_path_gain_idx = sram.rot_dir_att_db +
com_att_db_table[sram.com_att_6db];
quad_path_gain_idx = sram.rot_quad_att_db +
com_att_db_table[sram.com_att_6db];
dir_path_sign = (sram.vga_dir_sign) ? 1 : -1;
quad_path_sign = (sram.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_valid[i])
continue;
start_idx = ar9003_aic_find_valid(cal_sram_valid, 0, i);
end_idx = ar9003_aic_find_valid(cal_sram_valid, 1, i);
if (start_idx < 0) {
/* extrapolation */
start_idx = end_idx;
end_idx = ar9003_aic_find_valid(cal_sram_valid, 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_valid, 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_valid, 1, 0);
if (i < 0) {
i = 0;
ret = false;
}
fixed_com_att_db = com_att_db_table[MS(aic->aic_sram[i],
AR_PHY_AIC_SRAM_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;
struct ath_aic_sram_info sram;
sram.vga_dir_sign =
(aic_sram[i].dir_path_gain_lin >= 0) ? 1 : 0;
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;
sram.com_att_6db =
ar9003_aic_find_index(1, fixed_com_att_db);
sram.valid = 1;
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);
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);
aic->aic_sram[i] = (SM(sram.vga_dir_sign,
AR_PHY_AIC_SRAM_VGA_DIR_SIGN) |
SM(sram.vga_quad_sign,
AR_PHY_AIC_SRAM_VGA_QUAD_SIGN) |
SM(sram.com_att_6db,
AR_PHY_AIC_SRAM_COM_ATT_6DB) |
SM(sram.valid,
AR_PHY_AIC_SRAM_VALID) |
SM(sram.rot_dir_att_db,
AR_PHY_AIC_SRAM_ROT_DIR_ATT_DB) |
SM(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)
{
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
struct ath9k_hw_aic *aic = &ah->btcoex_hw.aic;
int i, num_chan;
num_chan = MS(mci_hw->config, ATH_MCI_CONFIG_AIC_CAL_NUM_CHAN);
if (!num_chan) {
aic->aic_cal_state = AIC_CAL_STATE_ERROR;
return aic->aic_cal_state;
}
if (cal_once) {
for (i = 0; i < 10000; i++) {
if ((REG_READ(ah, AR_PHY_AIC_CTRL_0_B1) &
AR_PHY_AIC_CAL_ENABLE) == 0)
break;
udelay(100);
}
}
/*
* Use AR_PHY_AIC_CAL_ENABLE bit instead of AR_PHY_AIC_CAL_DONE.
* Sometimes CAL_DONE bit is not asserted.
*/
if ((REG_READ(ah, AR_PHY_AIC_CTRL_0_B1) &
AR_PHY_AIC_CAL_ENABLE) != 0) {
ath_dbg(common, MCI, "AIC cal is not done after 40ms");
goto exit;
}
REG_WRITE(ah, AR_PHY_AIC_SRAM_ADDR_B1,
(ATH_AIC_SRAM_CAL_OFFSET | ATH_AIC_SRAM_AUTO_INCREMENT));
for (i = 0; i < ATH_AIC_MAX_BT_CHANNEL; i++) {
u32 value;
value = REG_READ(ah, AR_PHY_AIC_SRAM_DATA_B1);
if (value & 0x01) {
if (aic->aic_sram[i] == 0)
aic->aic_caled_chan++;
aic->aic_sram[i] = value;
if (!cal_once)
break;
}
}
if ((aic->aic_caled_chan >= num_chan) || cal_once) {
ar9003_aic_cal_done(ah);
} else {
/* Start calibration */
REG_CLR_BIT(ah, AR_PHY_AIC_CTRL_0_B1, AR_PHY_AIC_CAL_ENABLE);
REG_SET_BIT(ah, AR_PHY_AIC_CTRL_0_B1,
AR_PHY_AIC_CAL_CH_VALID_RESET);
REG_SET_BIT(ah, AR_PHY_AIC_CTRL_0_B1, AR_PHY_AIC_CAL_ENABLE);
}
exit:
return aic->aic_cal_state;
}
u8 ar9003_aic_calibration(struct ath_hw *ah)
{
struct ath9k_hw_aic *aic = &ah->btcoex_hw.aic;
u8 cal_ret = AIC_CAL_STATE_ERROR;
switch (aic->aic_cal_state) {
case AIC_CAL_STATE_IDLE:
cal_ret = ar9003_aic_cal_start(ah, 1);
break;
case AIC_CAL_STATE_STARTED:
cal_ret = ar9003_aic_cal_continue(ah, false);
break;
case AIC_CAL_STATE_DONE:
cal_ret = AIC_CAL_STATE_DONE;
break;
default:
break;
}
return cal_ret;
}
u8 ar9003_aic_start_normal(struct ath_hw *ah)
{
struct ath9k_hw_aic *aic = &ah->btcoex_hw.aic;
int16_t i;
if (aic->aic_cal_state != AIC_CAL_STATE_DONE)
return 1;
ar9003_aic_gain_table(ah);
REG_WRITE(ah, AR_PHY_AIC_SRAM_ADDR_B1, ATH_AIC_SRAM_AUTO_INCREMENT);
for (i = 0; i < ATH_AIC_MAX_BT_CHANNEL; i++) {
REG_WRITE(ah, AR_PHY_AIC_SRAM_DATA_B1, aic->aic_sram[i]);
}
/* FIXME: Replace these with proper register names */
REG_WRITE(ah, 0xa6b0, 0x80);
REG_WRITE(ah, 0xa6b4, 0x5b2df0);
REG_WRITE(ah, 0xa6b8, 0x10762cc8);
REG_WRITE(ah, 0xa6bc, 0x1219a4b);
REG_WRITE(ah, 0xa6c0, 0x1e01);
REG_WRITE(ah, 0xb6b4, 0xf0);
REG_WRITE(ah, 0xb6c0, 0x1e01);
REG_WRITE(ah, 0xb6b0, 0x81);
REG_WRITE(ah, AR_PHY_65NM_CH1_RXTX4, 0x40000000);
aic->aic_enabled = true;
return 0;
}
u8 ar9003_aic_cal_reset(struct ath_hw *ah)
{
struct ath9k_hw_aic *aic = &ah->btcoex_hw.aic;
aic->aic_cal_state = AIC_CAL_STATE_IDLE;
return aic->aic_cal_state;
}
u8 ar9003_aic_calibration_single(struct ath_hw *ah)
{
struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
u8 cal_ret;
int num_chan;
num_chan = MS(mci_hw->config, ATH_MCI_CONFIG_AIC_CAL_NUM_CHAN);
(void) ar9003_aic_cal_start(ah, num_chan);
cal_ret = ar9003_aic_cal_continue(ah, true);
return cal_ret;
}
void ar9003_hw_attach_aic_ops(struct ath_hw *ah)
{
struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah);
priv_ops->is_aic_enabled = ar9003_hw_is_aic_enabled;
}
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