static void mtk_ta_vchr_select(int i,int ta_v_chr_candidate[], int ta_charging_current_candidate[], int *max_charging_current, int *max_charging_current_i)
{
int current_vchr;
kal_bool retransmit = KAL_TRUE;
kal_uint32 retransmit_count=0;
current_vchr = battery_meter_get_charger_voltage();
if(ta_current_level != 5000 && current_vchr >= 4900) { /* pattern error before, so reset vchr to 5V */
battery_log(BAT_LOG_CRTI, "mtk_ta_vchr_select() : curr_VChr=%d, ta_current_level=%d\n",current_vchr,ta_current_level);
mtk_ta_reset_vchr();
}
do {
mtk_tuning_voltage(ta_current_level, ta_v_chr_candidate[i]);
current_vchr = battery_meter_get_charger_voltage();
if((abs(current_vchr - ta_current_level) > 300) && (ta_cable_out_occur == KAL_FALSE)) { /* variation > 0.3V, error occur */
retransmit_count++;
battery_log(BAT_LOG_CRTI, "mtk_ta_vchr_select(): retransmit_count =%d, cur_chr=%d, ta_current_level=%d\n",
retransmit_count, current_vchr, ta_current_level);
mtk_ta_reset_vchr();
} else {
retransmit = KAL_FALSE;
}
if((retransmit_count == 2) || (ta_cable_out_occur == KAL_TRUE)) {
retransmit = KAL_FALSE;
}
} while((retransmit == KAL_TRUE) && (ta_cable_out_occur == KAL_FALSE));
battery_charging_control(CHARGING_CMD_SET_CURRENT,&ta_charging_current); //1.5A
battery_log(BAT_LOG_CRTI, "mtk_ta_vchr_select() : use 1.5A for select max current\n");
msleep(900); // over 800ms to avoid interference pattern
ta_charging_current_candidate[i] = battery_meter_get_charging_current_imm();
/* we hope to choose the less VChr if the current difference between 2 step is not large, so we add weighting for different VChr step */
if(i == 1)
ta_charging_current_candidate[i] += 100; // weighting, plus 120mA for Vbat+0.4V
else if(i == 2)
ta_charging_current_candidate[i] += 50; // weighting, plug 60mA for Vbat+0.6V
if(ta_charging_current_candidate[i] > *max_charging_current) {
*max_charging_current = ta_charging_current_candidate[i];
*max_charging_current_i = i;
}
}
static void battery_pump_express_charger_check(void)
{
if (KAL_TRUE == ta_check_chr_type &&
STANDARD_CHARGER == BMT_status.charger_type &&
BMT_status.SOC >= TA_START_BATTERY_SOC &&
BMT_status.SOC < TA_STOP_BATTERY_SOC)
{
mutex_lock(&ta_mutex);
wake_lock(&TA_charger_suspend_lock);
mtk_ta_reset_vchr();
mtk_ta_init();
mtk_ta_detector();
/* need to re-check if the charger plug out during ta detector */
if(KAL_TRUE == ta_cable_out_occur)
ta_check_chr_type = KAL_TRUE;
else
ta_check_chr_type = KAL_FALSE;
wake_unlock(&TA_charger_suspend_lock);
mutex_unlock(&ta_mutex);
}
else
{
battery_xlog_printk(BAT_LOG_CRTI,
"Stop battery_pump_express_charger_check, SOC=%d, ta_check_chr_type = %d, charger_type = %d \n",
BMT_status.SOC, ta_check_chr_type, BMT_status.charger_type);
}
}
static void battery_pump_express_algorithm_start(void)
{
kal_int32 charger_vol;
kal_uint32 charging_enable = KAL_FALSE;
mutex_lock(&ta_mutex);
wake_lock(&TA_charger_suspend_lock);
if(KAL_TRUE == is_ta_connect)
{
/* check cable impedance */
charger_vol = battery_meter_get_charger_voltage();
if(KAL_FALSE == ta_vchr_tuning)
{
mtk_ta_retry_increase(); //increase TA voltage to 9V
charger_vol = battery_meter_get_charger_voltage();
ta_vchr_tuning = KAL_TRUE;
}
else if(BMT_status.SOC > TA_STOP_BATTERY_SOC)
{
//disable charging, avoid Iterm issue
battery_charging_control(CHARGING_CMD_ENABLE,&charging_enable);
mtk_ta_reset_vchr(); //decrease TA voltage to 5V
charger_vol = battery_meter_get_charger_voltage();
if(abs(charger_vol - ta_v_chr_org) <= 1000) // 1.0V
is_ta_connect = KAL_FALSE;
battery_xlog_printk(BAT_LOG_CRTI, "Stop battery_pump_express_algorithm, SOC=%d is_ta_connect =%d, TA_STOP_BATTERY_SOC: %d\n",
BMT_status.SOC, is_ta_connect, TA_STOP_BATTERY_SOC);
}
battery_xlog_printk(BAT_LOG_CRTI, "[BATTERY] check cable impedance, VA(%d) VB(%d) delta(%d).\n",
ta_v_chr_org, charger_vol, charger_vol - ta_v_chr_org);
battery_xlog_printk(BAT_LOG_CRTI, "mtk_ta_algorithm() end\n");
}
else
{
battery_xlog_printk(BAT_LOG_CRTI, "It's not a TA charger, bypass TA algorithm\n");
}
wake_unlock(&TA_charger_suspend_lock);
mutex_unlock(&ta_mutex);
}
static void mtk_ta_detector(void)
{
int real_v_chrA;
int real_v_chrB;
kal_bool retransmit = KAL_TRUE;
kal_uint32 retransmit_count=0;
U32 charging_enable = true;
battery_log(BAT_LOG_CRTI, "mtk_ta_detector() start\n");
battery_charging_control(CHARGING_CMD_ENABLE,&charging_enable);
do {
real_v_chrA = ta_get_charger_voltage();
mtk_ta_decrease();
mtk_ta_decrease();
real_v_chrB = ta_get_charger_voltage();
if(real_v_chrA - real_v_chrB >= 300) { /* 0.3V */
retransmit = KAL_FALSE;
is_ta_connect = KAL_TRUE;
} else {
retransmit_count++;
battery_log(BAT_LOG_CRTI, "mtk_ta_detector(): retransmit_count =%d, chrA=%d, chrB=%d\n",
retransmit_count, real_v_chrA, real_v_chrB);
mtk_ta_reset_vchr();
}
if((retransmit_count == 3) || (BMT_status.charger_exist == KAL_FALSE)) {
retransmit = KAL_FALSE;
is_ta_connect = KAL_FALSE;
}
} while((retransmit == KAL_TRUE) && (ta_cable_out_occur == KAL_FALSE));
battery_log(BAT_LOG_CRTI, "mtk_ta_detector() ta_current_level=%d, real_v_chrA=%d, real_v_chrB=%d, is_ta_connect=%d\n",
ta_current_level, real_v_chrA, real_v_chrB,is_ta_connect);
battery_log(BAT_LOG_CRTI, "mtk_ta_detector() end, retry_count=%d, ta_cable_out_occur=%d \n",retransmit_count,ta_cable_out_occur);
}
static void battery_pump_express_charger_check(void)
{
if (ta_check_chr_type == KAL_TRUE && BMT_status.charger_type == STANDARD_CHARGER) {
mutex_lock(&ta_mutex);
wake_lock(&TA_charger_suspend_lock);
mtk_ta_reset_vchr();
mtk_ta_init();
mtk_ta_detector();
first_vchr_det = KAL_TRUE;
if(ta_cable_out_occur == KAL_FALSE) {
ta_check_chr_type = KAL_FALSE;
} else {
/* need to re-check if the charger plug out during ta detector */
ta_check_chr_type = KAL_TRUE;
}
wake_unlock(&TA_charger_suspend_lock);
mutex_unlock(&ta_mutex);
}
}