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kernel_samsung_a34x-permissive/drivers/power/supply/mtk_pe2.c
Fede2782 c05564c4d8
Import A346BXXU1AWB9 kernel source 
Android 13
2024-04-28 15:49:01 +02:00

1448 lines
34 KiB
C
Executable file
Raw Blame History

// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2019 MediaTek Inc.
*/
/*
*
* Filename:
* ---------
* mtk_pe2.c
*
* Project:
* --------
* Android_Software
*
* Description:
* ------------
* This Module defines functions of Battery charging
*
* Author:
* -------
* Wy Chuang
*
*/
#include <linux/init.h> /* For init/exit macros */
#include <linux/module.h> /* For MODULE_ marcros */
#include <linux/fs.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/kdev_t.h>
#include <linux/fs.h>
#include <linux/cdev.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/wait.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/poll.h>
#include <linux/power_supply.h>
#include <linux/pm_wakeup.h>
#include <linux/time.h>
#include <linux/mutex.h>
#include <linux/kthread.h>
#include <linux/proc_fs.h>
#include <linux/platform_device.h>
#include <linux/seq_file.h>
#include <linux/scatterlist.h>
#include <linux/suspend.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/reboot.h>
#include "mtk_pe2.h"
#include "mtk_charger_algorithm_class.h"
static int pe2_dbg_level = PE2_DEBUG_LEVEL;
int pe2_get_debug_level(void)
{
return pe2_dbg_level;
}
static int pe2_plugout_reset(struct chg_alg_device *alg)
{
int ret = 0, cnt = 0;
struct mtk_pe20 *pe2;
pe2_dbg("%s\n", __func__);
pe2 = dev_get_drvdata(&alg->dev);
switch (pe2->state) {
case PE2_HW_UNINIT:
case PE2_HW_FAIL:
case PE2_HW_READY:
break;
case PE2_TA_NOT_SUPPORT:
pe2->state = PE2_HW_READY;
break;
case PE2_RUN:
case PE2_TUNING:
case PE2_POSTCC:
/* set flag to end PE2 thread asap */
mutex_lock(&pe2->cable_out_lock);
pe2->is_cable_out_occur = true;
mutex_unlock(&pe2->cable_out_lock);
while (mutex_trylock(&pe2->access_lock) == 0) {
pe2_err("%s:pe2 is running state:%d cnt:%d\n",
__func__, pe2->state,
cnt);
cnt++;
msleep(100);
}
mutex_lock(&pe2->cable_out_lock);
pe2->is_cable_out_occur = false;
mutex_unlock(&pe2->cable_out_lock);
pe2->idx = -1;
pe2->vbus = 5000000; /* mV */
/* Enable OVP */
ret = pe2_hal_enable_vbus_ovp(alg, true);
if (ret < 0)
pe2_err("%s:enable vbus ovp fail, ret:%d\n",
__func__, ret);
/* Set MIVR for vbus 5V */
ret = pe2_hal_set_mivr(alg, CHG1,
pe2->min_charger_voltage); /* uV */
if (ret < 0)
pe2_err("%s:set mivr fail, ret:%d\n",
__func__, ret);
if (alg->config == DUAL_CHARGERS_IN_SERIES) {
pe2_hal_enable_charger(alg, CHG2, false);
pe2_hal_charger_enable_chip(alg, CHG2, false);
}
pe2_dbg("%s: OK\n", __func__);
pe2->state = PE2_HW_READY;
mutex_unlock(&pe2->access_lock);
break;
default:
pe2_dbg("%s: error state:%d\n", __func__,
pe2->state);
break;
}
return 0;
}
int pe2_reset_ta_vchr(struct chg_alg_device *alg)
{
int ret, chr_volt = 0, ret_value = -1;
u32 retry_cnt = 0;
struct mtk_pe20 *pe2;
int chg_cnt, i, is_chip_enabled;
pe2_dbg("%s: starts\n", __func__);
pe2 = dev_get_drvdata(&alg->dev);
ret = pe2_hal_set_mivr(alg, 0, pe2->min_charger_voltage);
if (ret < 0)
pe2_err("%s:set mivr fail, ret:%d\n",
__func__, ret);
/* Reset TA's charging voltage */
do {
chg_cnt = pe2_hal_get_charger_cnt(alg);
if (chg_cnt > 1 && alg->config == DUAL_CHARGERS_IN_SERIES) {
for (i = CHG2; i < CHG_MAX; i++) {
is_chip_enabled =
pe2_hal_is_chip_enable(alg, i);
if (is_chip_enabled)
pe2_hal_enable_charger(alg, i, false);
}
}
pe2_hal_reset_ta(alg, CHG1);
if (ret < 0)
pe2_err("%s:reset TA fail, ret:%d\n",
__func__, ret);
msleep(250);
/* Check charger's voltage */
chr_volt = pe2_hal_get_vbus(alg);
pe2_dbg("%s: ori_vbus:%d vbus:%d\n", __func__,
pe2->ta_vchr_org, chr_volt);
if (abs(chr_volt - pe2->ta_vchr_org) <= 1000000) {
pe2->vbus = chr_volt;
pe2->idx = -1;
ret_value = 0;
break;
}
retry_cnt++;
} while (retry_cnt < 3);
if (ret_value != 0) {
pe2_err("%s: failed, ret = %d\n", __func__, ret);
ret = pe2_hal_set_mivr(alg, CHG1, pe2->vbus - 500000);
if (ret < 0)
pe2_err("%s:set mivr fail, ret:%d\n",
__func__, ret);
return -EHAL;
}
/* Measure VBAT */
pe2->vbat_orig = pe2_hal_get_vbus(alg);
pe2_dbg("%s: OK\n", __func__);
return ret;
}
static void pe2_check_cable_impedance(struct chg_alg_device *alg)
{
int ret = 0;
int vchr1, vchr2, cable_imp;
unsigned int aicr_value;
bool mivr_state = false;
struct timespec ptime[2], diff;
struct mtk_pe20 *pe2;
int input_current;
pe2_dbg("%s: starts type:%d\n", __func__,
alg->config);
pe2 = dev_get_drvdata(&alg->dev);
if (alg->config == SINGLE_CHARGER)
input_current = pe2->sc_input_current;
else if (alg->config == DUAL_CHARGERS_IN_SERIES)
input_current = pe2->dcs_input_current;
else
input_current = pe2->sc_input_current;
if (pe2->vbat_orig > pe2->vbat_cable_imp_threshold) {
pe2_info("VBAT > %dmV, directly set aicr to %dmA\n",
pe2->vbat_cable_imp_threshold / 1000,
input_current / 1000);
pe2->aicr_cable_imp = input_current;
goto end;
}
/* Disable cable drop compensation */
pe2_hal_enable_cable_drop_comp(alg, false);
get_monotonic_boottime(&ptime[0]);
/* Set ichg = 2500mA, set MIVR */
pe2_hal_set_charging_current(alg, CHG1, 2500000);
mdelay(240);
pe2_hal_set_mivr(alg, CHG1, pe2->min_charger_voltage);
get_monotonic_boottime(&ptime[1]);
diff = timespec_sub(ptime[1], ptime[0]);
aicr_value = 800000;
pe2_hal_set_input_current(alg, CHG1, aicr_value);
/* To wait for soft-start */
msleep(150);
ret = pe2_hal_get_mivr_state(alg, CHG1, &mivr_state);
if (ret != -ENOTSUPP && mivr_state) {
pe2->aicr_cable_imp = 1000000;
goto end;
}
vchr1 = pe2_hal_get_vbus(alg);
aicr_value = 500000;
pe2_hal_set_input_current(alg, CHG1, aicr_value);
msleep(20);
vchr2 = pe2_hal_get_vbus(alg);
/*
* Calculate cable impedance (|V1 - V2|) / (|I2 - I1|)
* m_ohm = (mv * 10 * 1000) / (mA * 10)
* m_ohm = (uV * 10) / (mA * 10)
*/
cable_imp = (abs(vchr1 - vchr2) * 10) / (7400 - 4625);
pe2_info("%s: cable_imp:%d mohm, vchr1:%d, vchr2:%d, time:%ld\n",
__func__, cable_imp, vchr1 / 1000, vchr2 / 1000,
diff.tv_nsec);
/* Recover cable drop compensation */
aicr_value = 100000;
pe2_hal_set_input_current(alg, CHG1, aicr_value);
msleep(250);
if (cable_imp < pe2->cable_imp_threshold) {
pe2->aicr_cable_imp = input_current;
pe2_info("Normal cable\n");
} else {
pe2->aicr_cable_imp = 1000000; /* uA */
pe2_info("Bad cable\n");
}
pe2_hal_set_input_current(alg, CHG1, pe2->aicr_cable_imp);
pe2_info("%s: set aicr:%dmA, vbat:%dmV, mivr_state:%d\n",
__func__, pe2->aicr_cable_imp / 1000,
pe2->vbat_orig / 1000, mivr_state);
return;
end:
pe2_info("%s not started: set aicr:%dmA, vbat:%dmV, mivr_state:%d\n",
__func__, pe2->aicr_cable_imp / 1000,
pe2->vbat_orig / 1000, mivr_state);
}
static int _pe20_set_ta_vchr(struct chg_alg_device *alg, u32 chr_volt)
{
int ret = 0, ret_value = 0;
struct mtk_pe20 *pe2;
int chg_cnt, i;
bool is_chip_enabled;
pe2_dbg("%s: starts\n", __func__);
pe2 = dev_get_drvdata(&alg->dev);
/* Not to set chr volt if cable is plugged out */
if (pe2->is_cable_out_occur) {
pe2_err("%s: failed, cable out\n", __func__);
return -ECABLEOUT;
}
chg_cnt = pe2_hal_get_charger_cnt(alg);
if (chg_cnt > 1 && alg->config == DUAL_CHARGERS_IN_SERIES) {
for (i = CHG2; i < CHG_MAX; i++) {
is_chip_enabled = pe2_hal_is_chip_enable(alg, i);
if (is_chip_enabled) {
ret = pe2_hal_enable_charger(alg, i, false);
if (ret < 0) {
pe2_err("%s:enable chip fail,idx:%d ret:%d\n",
__func__, i, ret);
ret_value = -EHAL;
}
}
}
}
ret = pe2_hal_send_ta20_current_pattern(alg, chr_volt);
if (ret < 0) {
pe2_err("%s: pattern failed, ret = %d\n", __func__, ret);
ret_value = -EHAL;
}
return ret_value;
}
static int pe20_set_ta_vchr(struct chg_alg_device *alg, u32 chr_volt)
{
int ret = 0, ret_value = 0;
int vchr_before, vchr_after, vchr_delta;
const u32 sw_retry_cnt_max = 3;
const u32 retry_cnt_max = 5;
u32 sw_retry_cnt = 0, retry_cnt = 0;
struct mtk_pe20 *pe2;
pe2_dbg("%s: starts, target:%d\n", __func__, chr_volt / 1000);
pe2 = dev_get_drvdata(&alg->dev);
do {
vchr_before = pe2_hal_get_vbus(alg);
ret = _pe20_set_ta_vchr(alg, chr_volt);
vchr_after = pe2_hal_get_vbus(alg);
vchr_delta = abs(vchr_after - chr_volt);
/*
* It is successful if VBUS difference to target is
* less than 500mV.
*/
pe2_err("ret:%d delta:%d %d %d\n",
ret, vchr_delta,
vchr_after, chr_volt);
if (vchr_delta < 500000 && ret == 0) {
pe2_dbg("%s: OK, vchr = (%d, %d), vchr_target = %dmV\n",
__func__, vchr_before / 1000, vchr_after / 1000,
chr_volt / 1000);
return ret_value;
}
if (ret == 0 || sw_retry_cnt >= sw_retry_cnt_max)
retry_cnt++;
else
sw_retry_cnt++;
ret = pe2_hal_set_mivr(alg, CHG1, pe2->min_charger_voltage);
if (ret < 0)
pe2_err("%s:set mivr fail, ret:%d\n",
__func__, ret);
pe2_dbg("%s: retry_cnt = (%d, %d), vchr = (%d, %d), vchr_target = %dmV\n",
__func__, sw_retry_cnt, retry_cnt, vchr_before / 1000,
vchr_after / 1000, chr_volt / 1000);
pe2_dbg("%s: %d %d %d %d\n", __func__,
pe2->is_cable_out_occur,
pe2_hal_get_charger_type(alg),
retry_cnt,
retry_cnt_max);
} while (!pe2->is_cable_out_occur &&
(pe2_hal_get_charger_type(alg) !=
POWER_SUPPLY_TYPE_USB_DCP) &&
(retry_cnt < retry_cnt_max));
if (pe2->is_cable_out_occur)
ret_value = -ECABLEOUT;
else
ret_value = -EHAL;
pe2_dbg("%s: failed, vchr_org = %dmV, vchr_after = %dmV, target_vchr = %dmV\n",
__func__, pe2->ta_vchr_org / 1000, vchr_after / 1000,
chr_volt / 1000);
return ret_value;
}
static int pe20_detect_ta(struct chg_alg_device *alg)
{
int ret = 0;
struct mtk_pe20 *pe2;
pe2_dbg("%s: starts\n", __func__);
pe2 = dev_get_drvdata(&alg->dev);
pe2->ta_vchr_org = pe2_hal_get_vbus(alg);
/* Disable OVP */
ret = pe2_hal_enable_vbus_ovp(alg, false);
if (ret < 0)
goto err;
if (abs(pe2->ta_vchr_org - 8500000) > 500000)
ret = pe20_set_ta_vchr(alg, 8500000);
else
ret = pe20_set_ta_vchr(alg, 6500000);
pe2_dbg("%s: ret:%d\n", __func__, ret);
return ret;
err:
pe2_hal_enable_vbus_ovp(alg, true);
pe2_err("%s: failed, ret = %d\n", __func__, ret);
return ret;
}
static int __pe2_check_charger(struct chg_alg_device *alg)
{
int ret = 0, ret_value = 0;
struct mtk_pe20 *pe2;
int uisoc;
pe2 = dev_get_drvdata(&alg->dev);
uisoc = pe2_hal_get_uisoc(alg);
pe2_dbg("%s uisoc:%d s:%d end:%d type:%d", __func__,
uisoc,
pe2->ta_start_battery_soc,
pe2->ta_stop_battery_soc,
pe2_hal_get_charger_type(alg));
if (pe2_hal_get_charger_type(alg) !=
POWER_SUPPLY_TYPE_USB_DCP) {
ret_value = ALG_TA_NOT_SUPPORT;
goto out;
}
if (pe2->is_cable_out_occur)
goto out;
if (uisoc < pe2->ta_start_battery_soc ||
uisoc >= pe2->ta_stop_battery_soc) {
ret_value = ALG_TA_CHECKING;
goto out;
}
ret = pe2_reset_ta_vchr(alg);
if (ret != 0)
goto out;
if (pe2->is_cable_out_occur)
goto out;
pe2_check_cable_impedance(alg);
if (pe2->is_cable_out_occur)
goto out;
ret = pe20_detect_ta(alg);
if (ret < 0)
goto out;
pe2_dbg("%s: OK, state = %d\n",
__func__, pe2->state);
return ret;
out:
if (ret_value == 0)
ret_value = ALG_TA_NOT_SUPPORT;
pe2_dbg("%s:SOC:(%d,%d,%d),state:%d,chr_type:%d,ret:%d,plugout:%d\n",
__func__,
pe2_hal_get_uisoc(alg),
pe2->ta_start_battery_soc,
pe2->ta_stop_battery_soc,
pe2->state,
pe2_hal_get_charger_type(alg),
ret,
pe2->is_cable_out_occur);
return ret_value;
}
static int pe2_leave(struct chg_alg_device *alg)
{
int ret = 0;
struct mtk_pe20 *pe2;
pe2_dbg("%s: starts\n", __func__);
pe2 = dev_get_drvdata(&alg->dev);
ret = pe2_reset_ta_vchr(alg);
if (ret != 0) {
pe2_err("%s: failed, state = %d, ret = %d\n",
__func__, pe2->state, ret);
}
ret = pe2_hal_enable_vbus_ovp(alg, true);
if (ret != 0) {
pe2_err("%s: enable vbus ovp fai,ret:%d\n",
__func__, ret);
}
pe2_hal_set_mivr(alg, CHG1, pe2->min_charger_voltage);
if (ret != 0) {
pe2_err("%s:set mivr fail,ret:%d\n",
__func__, ret);
}
pe2_dbg("%s: OK\n", __func__);
return ret;
}
static int _pe2_init_algo(struct chg_alg_device *alg)
{
struct mtk_pe20 *pe2;
int ret, cnt;
pe2 = dev_get_drvdata(&alg->dev);
mutex_lock(&pe2->access_lock);
if (pe2_hal_init_hardware(alg) != 0) {
pe2->state = PE2_HW_FAIL;
pe2_err("%s:init hw fail\n", __func__);
} else
pe2->state = PE2_HW_READY;
ret = pe2_hal_set_efficiency_table(pe2->alg);
if (ret != 0)
pe2_err("%s: use default table, %d\n", __func__, ret);
if (alg->config == DUAL_CHARGERS_IN_PARALLEL) {
pe2_err("%s does not support DUAL_CHARGERS_IN_PARALLEL\n",
__func__);
alg->config = SINGLE_CHARGER;
} else if (alg->config == DUAL_CHARGERS_IN_SERIES) {
cnt = pe2_hal_get_charger_cnt(alg);
if (cnt == 2)
alg->config = DUAL_CHARGERS_IN_SERIES;
else
alg->config = SINGLE_CHARGER;
} else
alg->config = SINGLE_CHARGER;
mutex_unlock(&pe2->access_lock);
pe2_dbg("%s config:%d\n", __func__, alg->config);
return 0;
}
static char *pe2_state_to_str(int state)
{
switch (state) {
case PE2_HW_UNINIT:
return "PE2_HW_UNINIT";
case PE2_HW_FAIL:
return "PE2_HW_FAIL";
case PE2_HW_READY:
return "PE2_HW_READY";
case PE2_TA_NOT_SUPPORT:
return "PE2_TA_NOT_SUPPORT";
case PE2_RUN:
return "PE2_RUN";
case PE2_TUNING:
return "PE2_TUNING";
case PE2_POSTCC:
return "PE2_POSTCC";
default:
break;
}
pe2_err("%s unknown state:%d\n", __func__
, state);
return "PE2_UNKNOWN";
}
static int _pe2_is_algo_ready(struct chg_alg_device *alg)
{
struct mtk_pe20 *pe2;
int ret_value, uisoc;
pe2 = dev_get_drvdata(&alg->dev);
mutex_lock(&pe2->access_lock);
__pm_stay_awake(pe2->suspend_lock);
pe2_dbg("%s state:%s\n", __func__,
pe2_state_to_str(pe2->state));
switch (pe2->state) {
case PE2_HW_UNINIT:
case PE2_HW_FAIL:
ret_value = ALG_INIT_FAIL;
break;
case PE2_HW_READY:
uisoc = pe2_hal_get_uisoc(alg);
if (pe2_hal_get_charger_type(alg) !=
POWER_SUPPLY_TYPE_USB_DCP) {
ret_value = ALG_TA_NOT_SUPPORT;
} else if (uisoc < pe2->ta_start_battery_soc ||
uisoc >= pe2->ta_stop_battery_soc ||
pe2->charging_current_limit1 != -1 ||
pe2->charging_current_limit2 != -1) {
ret_value = ALG_NOT_READY;
} else {
ret_value = ALG_READY;
}
break;
case PE2_TA_NOT_SUPPORT:
ret_value = ALG_TA_NOT_SUPPORT;
break;
case PE2_RUN:
case PE2_TUNING:
case PE2_POSTCC:
ret_value = ALG_RUNNING;
break;
default:
ret_value = ALG_INIT_FAIL;
break;
}
__pm_relax(pe2->suspend_lock);
mutex_unlock(&pe2->access_lock);
return ret_value;
}
static int pe2_sc_set_charger(struct chg_alg_device *alg)
{
struct mtk_pe20 *pe2;
int ichg1_min = -1, aicr1_min = -1;
int ret;
pe2 = dev_get_drvdata(&alg->dev);
if (pe2->input_current_limit1 == 0 ||
pe2->charging_current_limit1 == 0) {
pr_notice("input/charging current is 0, end PE2\n");
return -1;
}
mutex_lock(&pe2->data_lock);
if (pe2->charging_current_limit1 != -1) {
if (pe2->charging_current_limit1 <
pe2->sc_charger_current)
pe2->charging_current1 =
pe2->charging_current_limit1;
ret = pe2_hal_get_min_charging_current(alg, CHG1, &ichg1_min);
if (ret != -ENOTSUPP &&
pe2->charging_current_limit1 < ichg1_min)
pe2->charging_current1 = 0;
} else
pe2->charging_current1 = pe2->sc_charger_current;
if (pe2->input_current_limit1 != -1 &&
pe2->input_current_limit1 <
pe2->sc_input_current) {
pe2->input_current1 = pe2->input_current_limit1;
ret = pe2_hal_get_min_input_current(alg, CHG1, &aicr1_min);
if (ret != -ENOTSUPP &&
pe2->input_current_limit1 < aicr1_min)
pe2->input_current1 = 0;
} else
pe2->input_current1 = pe2->sc_input_current;
mutex_unlock(&pe2->data_lock);
if (pe2->input_current1 == 0 ||
pe2->charging_current1 == 0) {
pe2_err("current is zero %d %d\n",
pe2->input_current1,
pe2->charging_current1);
return -1;
}
pe2_hal_set_charging_current(alg,
CHG1, pe2->charging_current1);
pe2_hal_set_input_current(alg,
CHG1, pe2->input_current1);
pe2_hal_set_cv(alg,
CHG1, pe2->cv);
pe2_dbg("%s m:%d s:%d cv:%d chg1:%d,%d min:%d:%d\n", __func__,
alg->config,
pe2->state,
pe2->cv,
pe2->input_current1,
pe2->charging_current1,
ichg1_min,
aicr1_min);
return 0;
}
static int pe2_dcs_set_charger(struct chg_alg_device *alg)
{
struct mtk_pe20 *pe2;
//bool chg1_enable = true;
bool chg2_enable = true;
bool chg2_chip_enabled = false;
int ret;
int ichg1_min = -1, ichg2_min = -1;
int aicr1_min = -1;
pe2 = dev_get_drvdata(&alg->dev);
if (pe2->input_current_limit1 == 0 ||
pe2->charging_current_limit1 == 0 ||
pe2->charging_current_limit2 == 0) {
pr_notice("input/charging current is 0, end PE2\n");
return -1;
}
mutex_lock(&pe2->data_lock);
if (pe2->input_current_limit1 != -1 &&
pe2->input_current_limit1 <
pe2->dcs_input_current) {
pe2->input_current1 = pe2->input_current_limit1;
ret = pe2_hal_get_min_input_current(alg, CHG1, &aicr1_min);
if (ret != -ENOTSUPP &&
pe2->input_current_limit1 < aicr1_min)
pe2->input_current1 = 0;
} else
pe2->input_current1 = pe2->dcs_input_current;
if (pe2->charging_current_limit1 != -1 &&
pe2->charging_current_limit1 <
pe2->dcs_chg1_charger_current) {
pe2->charging_current1 = pe2->charging_current_limit1;
ret = pe2_hal_get_min_charging_current(alg, CHG1, &ichg1_min);
if (ret != -ENOTSUPP &&
pe2->charging_current_limit1 < ichg1_min)
pe2->charging_current1 = 0;
} else
pe2->charging_current1 = pe2->dcs_chg1_charger_current;
if (pe2->state == PE2_RUN)
pe2->charging_current2 = pe2->dcs_chg2_charger_current;
if (pe2->charging_current_limit2 != -1 &&
pe2->charging_current_limit2 <
pe2->charging_current2) {
pe2->charging_current2 = pe2->charging_current_limit2;
ret = pe2_hal_get_min_charging_current(alg, CHG2, &ichg1_min);
if (ret != -ENOTSUPP &&
pe2->charging_current_limit2 < ichg1_min)
pe2->charging_current2 = 0;
}
mutex_unlock(&pe2->data_lock);
if (pe2->input_current1 == 0 ||
pe2->charging_current1 == 0 ||
pe2->charging_current2 == 0) {
pe2_err("current is zero %d %d %d\n",
pe2->input_current1,
pe2->charging_current1,
pe2->charging_current2);
pe2_hal_enable_charger(alg, CHG2, false);
pe2_hal_charger_enable_chip(alg, CHG2, false);
return -1;
}
chg2_chip_enabled = pe2_hal_is_chip_enable(alg, CHG2);
pe2_err("chg2_en:%d %d %d\n",
chg2_enable, chg2_chip_enabled, pe2->state);
if (pe2->state == PE2_RUN) {
if (!chg2_chip_enabled)
pe2_hal_charger_enable_chip(alg, CHG2, true);
pe2_hal_enable_charger(alg, CHG2, true);
pe2_hal_set_input_current(alg,
CHG2, pe2->charging_current2);
pe2_hal_set_charging_current(alg,
CHG2, pe2->charging_current2);
pe2_hal_set_eoc_current(alg, CHG1,
pe2->dual_polling_ieoc);
pe2_hal_enable_termination(alg, CHG1, false);
pe2_hal_safety_check(alg, pe2->dual_polling_ieoc);
} else if (pe2->state == PE2_TUNING) {
if (!chg2_chip_enabled)
pe2_hal_charger_enable_chip(alg, CHG2, true);
pe2_hal_enable_charger(alg, CHG2, true);
pe2_hal_set_eoc_current(alg, CHG1, pe2->dual_polling_ieoc);
pe2_hal_enable_termination(alg, CHG1, false);
pe2_hal_safety_check(alg, pe2->dual_polling_ieoc);
} else if (pe2->state == PE2_POSTCC) {
pe2_hal_set_eoc_current(alg, CHG1, 150000);
pe2_hal_enable_termination(alg, CHG1, true);
} else {
pe2_err("%s state error!", __func__);
return -1;
}
pe2_hal_set_charging_current(alg,
CHG1, pe2->charging_current1);
pe2_hal_set_input_current(alg,
CHG1, pe2->input_current1);
pe2_hal_set_cv(alg,
CHG1, pe2->cv);
pe2_dbg("%s m:%d s:%d cv:%d chg1:%d,%d chg2:%d,%d chg2en:%d min:%d,%d,%d\n",
__func__,
alg->config,
pe2->state,
pe2->cv,
pe2->input_current1,
pe2->charging_current1,
pe2->input_current2,
pe2->charging_current2,
chg2_enable,
ichg1_min,
ichg2_min,
aicr1_min);
return 0;
}
static int __pe2_run(struct chg_alg_device *alg)
{
struct mtk_pe20 *pe2;
int i;
int vbat, vbus, ichg;
int pre_vbus, pre_idx;
int tune = 0, pes = 0; /* For log, to know the state of PE+20 */
u32 size;
int ret = 0, ret_value = 0, vchr, uisoc;
pe2 = dev_get_drvdata(&alg->dev);
if (pe2->is_cable_out_occur) {
ret_value = ALG_TA_NOT_SUPPORT;
goto out;
}
vbat = pe2_hal_get_vbat(alg);
vbus = pe2_hal_get_vbus(alg);
ichg = pe2_hal_get_ibat(alg);
pre_vbus = pe2->vbus;
pre_idx = pe2->idx;
/* PE+ leaves unexpectedly */
vchr = pe2_hal_get_vbus(alg);
if (abs(vchr - pe2->ta_vchr_org) < 1000000) {
pe2_err("%s: PE+20 leave unexpectedly, recheck TA %d %d\n",
__func__,
vchr,
pe2->ta_vchr_org);
ret = pe2_leave(alg);
pe2->ta_vchr_org = vchr;
ret_value = ALG_TA_CHECKING;
goto out;
}
ichg = pe2_hal_get_ibat(alg);
/* Check SOC & Ichg */
uisoc = pe2_hal_get_uisoc(alg);
if (uisoc > pe2->ta_stop_battery_soc &&
ichg > 0 && ichg < pe2->pe20_ichg_level_threshold) {
ret = pe2_leave(alg);
pe2_err("%s: OK, SOC = (%d,%d), stop PE+20\n", __func__,
uisoc, pe2->ta_stop_battery_soc);
ret_value = ALG_DONE;
goto out;
}
size = ARRAY_SIZE(pe2->profile);
for (i = 0; i < size; i++) {
tune = 0;
/* Exceed this level, check next level */
if (vbat > (pe2->profile[i].vbat + 100000))
continue;
/* If vbat is still 30mV larger than the lower level
* Do not down grade
*/
if (i < pe2->idx && vbat > (pe2->profile[i].vbat + 30000))
continue;
if (pe2->vbus != pe2->profile[i].vchr)
tune = 1;
pe2->vbus = pe2->profile[i].vchr;
pe2->idx = i;
if (abs(vbus - pe2->vbus) >= 1000000)
tune = 2;
if (tune != 0) {
ret = pe20_set_ta_vchr(alg, pe2->vbus);
if (ret == 0)
pe2_hal_set_mivr(alg, CHG1, pe2->vbus - 500000);
else {
pe2_leave(alg);
ret_value = ALG_TA_NOT_SUPPORT;
}
} else
pe2_hal_set_mivr(alg, CHG1, pe2->vbus - 500000);
break;
}
pes = 2;
if (alg->config == DUAL_CHARGERS_IN_SERIES) {
if (pe2_dcs_set_charger(alg) != 0) {
ret = pe2_leave(alg);
ret_value = ALG_DONE;
goto out;
}
} else {
if (pe2_sc_set_charger(alg) != 0) {
ret = pe2_leave(alg);
ret_value = ALG_DONE;
goto out;
}
}
pe2_dbg("%s cv:%d chg1:%d,%d chg2:%d,%d\n", __func__,
pe2->cv,
pe2->input_current1,
pe2->charging_current1,
pe2->input_current2,
pe2->charging_current2);
out:
pe2_dbg("%s: vbus = (%d, %d), idx = (%d, %d), I = %d plugout=%d\n",
__func__, pre_vbus / 1000, pe2->vbus / 1000, pre_idx,
pe2->idx, ichg / 1000, pe2->is_cable_out_occur);
pe2_dbg("%s: SOC = %d, state = %s, tune = %d, pes = %d, vbat = %d, ret = %d:%d\n",
__func__, pe2_hal_get_uisoc(alg),
pe2_state_to_str(pe2->state),
tune, pes,
vbat / 1000, ret, ret_value);
return ret_value;
}
static int _pe2_start_algo(struct chg_alg_device *alg)
{
int ret = 0, ret_value = 0;
struct mtk_pe20 *pe2;
bool again;
pe2 = dev_get_drvdata(&alg->dev);
mutex_lock(&pe2->access_lock);
__pm_stay_awake(pe2->suspend_lock);
do {
pe2_info("%s state:%d %s %d\n", __func__,
pe2->state,
pe2_state_to_str(pe2->state),
again);
again = false;
switch (pe2->state) {
case PE2_HW_UNINIT:
case PE2_HW_FAIL:
ret_value = ALG_INIT_FAIL;
break;
case PE2_HW_READY:
ret = __pe2_check_charger(alg);
if (ret == 0) {
pe2->state = PE2_RUN;
ret_value = ALG_READY;
again = true;
} else if (ret == ALG_TA_CHECKING)
ret_value = ALG_TA_CHECKING;
else if (pe2->charging_current_limit1 != -1 ||
pe2->charging_current_limit2 != -1)
ret_value = ALG_NOT_READY;
else {
pe2->state = PE2_TA_NOT_SUPPORT;
ret_value = ALG_TA_NOT_SUPPORT;
}
break;
case PE2_TA_NOT_SUPPORT:
ret_value = ALG_TA_NOT_SUPPORT;
break;
case PE2_RUN:
case PE2_TUNING:
case PE2_POSTCC:
ret = __pe2_run(alg);
if (ret == ALG_TA_NOT_SUPPORT)
pe2->state = PE2_TA_NOT_SUPPORT;
else if (ret == ALG_TA_CHECKING) {
pe2->state = PE2_RUN;
again = true;
} else if (ret == ALG_DONE)
pe2->state = PE2_HW_READY;
ret_value = ret;
break;
default:
pe2_err("PE2 unknown state:%d\n", pe2->state);
ret_value = ALG_INIT_FAIL;
break;
}
} while (again == true);
__pm_relax(pe2->suspend_lock);
mutex_unlock(&pe2->access_lock);
return ret_value;
}
static bool _pe2_is_algo_running(struct chg_alg_device *alg)
{
struct mtk_pe20 *pe2;
pe2_dbg("%s\n", __func__);
pe2 = dev_get_drvdata(&alg->dev);
if (pe2->state == PE2_RUN ||
pe2->state == PE2_TUNING ||
pe2->state == PE2_POSTCC)
return true;
return false;
}
static int _pe2_stop_algo(struct chg_alg_device *alg)
{
struct mtk_pe20 *pe2;
pe2 = dev_get_drvdata(&alg->dev);
pe2_dbg("%s %d\n", __func__, pe2->state);
if (pe2->state == PE2_RUN ||
pe2->state == PE2_TUNING ||
pe2->state == PE2_POSTCC) {
pe2_reset_ta_vchr(alg);
pe2->state = PE2_HW_READY;
if (alg->config == DUAL_CHARGERS_IN_SERIES) {
pe2_hal_enable_charger(alg, CHG2, false);
pe2_hal_charger_enable_chip(alg,
CHG2, false);
}
}
return 0;
}
static int pe2_full_event(struct chg_alg_device *alg)
{
struct mtk_pe20 *pe2;
int ret;
bool chg_en, chg2_enabled = false;
int ichg2, ichg2_min;
int ret_value = 0;
pe2 = dev_get_drvdata(&alg->dev);
switch (pe2->state) {
case PE2_HW_UNINIT:
case PE2_HW_FAIL:
case PE2_HW_READY:
case PE2_TA_NOT_SUPPORT:
break;
case PE2_RUN:
case PE2_TUNING:
case PE2_POSTCC:
if (alg->config == DUAL_CHARGERS_IN_SERIES) {
pe2_hal_is_charger_enable(alg, CHG2, &chg_en);
chg2_enabled = pe2_hal_is_chip_enable(alg, CHG2);
if (!chg_en || !chg2_enabled) {
/* notify eoc , fix me */
pe2->state = PE2_HW_READY;
pe2_err("charging done:%d %d\n",
__func__, chg_en, chg2_enabled);
if (alg->is_polling_mode == false)
ret_value = 1;
} else {
pe2_hal_get_charging_current(
alg, CHG2, &ichg2);
ret = pe2_hal_get_min_charging_current(
alg, CHG2, &ichg2_min);
if (ret == -ENOTSUPP)
ichg2_min = 100000;
pe2_err("ichg2:%d, ichg2_min:%d state:%d\n",
ichg2, ichg2_min, pe2->state);
if (ichg2 - 500000 <= ichg2_min) {
pe2->state = PE2_POSTCC;
pe2_hal_enable_charger(alg,
CHG2, false);
pe2_hal_set_eoc_current(alg,
CHG1, 150000);
pe2_hal_enable_termination(alg,
CHG1, true);
} else {
pe2->state = PE2_TUNING;
mutex_lock(&pe2->data_lock);
if (pe2->charging_current2 >= 500000)
pe2->charging_current2 = ichg2
- 500000;
pe2_hal_set_charging_current(alg,
CHG2, pe2->charging_current2);
mutex_unlock(&pe2->data_lock);
}
ret_value = 1;
}
} else {
if (pe2->state == PE2_RUN) {
pe2_err("%s evt full\n", __func__);
pe2_leave(alg);
pe2->state = PE2_HW_READY;
}
}
break;
default:
pe2_dbg("%s: error state:%d\n", __func__,
pe2->state);
break;
}
return ret_value;
}
static int _pe2_notifier_call(struct chg_alg_device *alg,
struct chg_alg_notify *notify)
{
struct mtk_pe20 *pe2;
int ret_value = 0;
pe2 = dev_get_drvdata(&alg->dev);
pe2_err("%s evt:%d state:%s\n", __func__, notify->evt,
pe2_state_to_str(pe2->state));
switch (notify->evt) {
case EVT_PLUG_OUT:
ret_value = pe2_plugout_reset(alg);
break;
case EVT_FULL:
ret_value = pe2_full_event(alg);
break;
default:
ret_value = -EINVAL;
}
return ret_value;
}
static void mtk_pe2_parse_dt(struct mtk_pe20 *pe2,
struct device *dev)
{
struct device_node *np = dev->of_node;
u32 val;
/* PE 2.0 */
if (of_property_read_u32(np, "pe20_ichg_level_threshold", &val) >= 0)
pe2->pe20_ichg_level_threshold = val;
else {
pr_notice("use default PE20_ICHG_LEAVE_THRESHOLD:%d\n",
PE20_ICHG_LEAVE_THRESHOLD);
pe2->pe20_ichg_level_threshold =
PE20_ICHG_LEAVE_THRESHOLD;
}
if (of_property_read_u32(np, "ta_start_battery_soc", &val) >= 0)
pe2->ta_start_battery_soc = val;
else {
pr_notice("use default TA_START_BATTERY_SOC:%d\n",
TA_START_BATTERY_SOC);
pe2->ta_start_battery_soc = TA_START_BATTERY_SOC;
}
if (of_property_read_u32(np, "ta_stop_battery_soc", &val) >= 0)
pe2->ta_stop_battery_soc = val;
else {
pr_notice("use default TA_STOP_BATTERY_SOC:%d\n",
TA_STOP_BATTERY_SOC);
pe2->ta_stop_battery_soc = TA_STOP_BATTERY_SOC;
}
if (of_property_read_u32(np, "min_charger_voltage", &val) >= 0)
pe2->min_charger_voltage = val;
else {
pr_notice("use default V_CHARGER_MIN:%d\n", PE20_V_CHARGER_MIN);
pe2->min_charger_voltage = PE20_V_CHARGER_MIN;
}
/* cable measurement impedance */
if (of_property_read_u32(np, "cable_imp_threshold", &val) >= 0)
pe2->cable_imp_threshold = val;
else {
pr_notice("use default CABLE_IMP_THRESHOLD:%d\n",
PE2_CABLE_IMP_THRESHOLD);
pe2->cable_imp_threshold = PE2_CABLE_IMP_THRESHOLD;
}
if (of_property_read_u32(np, "vbat_cable_imp_threshold", &val) >= 0)
pe2->vbat_cable_imp_threshold = val;
else {
pr_notice("use default VBAT_CABLE_IMP_THRESHOLD:%d\n",
PE2_VBAT_CABLE_IMP_THRESHOLD);
pe2->vbat_cable_imp_threshold = PE2_VBAT_CABLE_IMP_THRESHOLD;
}
/* single charger */
if (of_property_read_u32(np, "sc_input_current", &val) >= 0)
pe2->sc_input_current = val;
else {
pr_notice("use default SC_INPUT_CURRENT:%d\n",
SC_INPUT_CURRENT);
pe2->sc_input_current = SC_INPUT_CURRENT;
}
if (of_property_read_u32(np, "sc_charger_current", &val) >= 0)
pe2->sc_charger_current = val;
else {
pr_notice("use default SC_CHARGING_CURRENT:%d\n",
SC_CHARGING_CURRENT);
pe2->sc_charger_current = SC_CHARGING_CURRENT;
}
/* dual charger in series */
if (of_property_read_u32(np, "dcs_input_current", &val) >= 0)
pe2->dcs_input_current = val;
else {
pr_notice("use default DCS_INPUT_CURRENT:%d\n",
DCS_INPUT_CURRENT);
pe2->dcs_input_current = DCS_INPUT_CURRENT;
}
if (of_property_read_u32(np, "dcs_chg1_charger_current", &val) >= 0)
pe2->dcs_chg1_charger_current = val;
else {
pr_notice("use default DCS_CHG1_CHARGER_CURRENT:%d\n",
DCS_CHG1_CHARGER_CURRENT);
pe2->dcs_chg1_charger_current = DCS_CHG1_CHARGER_CURRENT;
}
if (of_property_read_u32(np, "dcs_chg2_charger_current", &val) >= 0)
pe2->dcs_chg2_charger_current = val;
else {
pr_notice("use default DCS_CHG2_CHARGER_CURRENT:%d\n",
SC_CHARGING_CURRENT);
pe2->dcs_chg2_charger_current = DCS_CHG2_CHARGER_CURRENT;
}
if (of_property_read_u32(np, "slave_mivr_diff", &val) >= 0)
pe2->pe2_slave_mivr_diff = val;
else {
pr_notice("use default slave_mivr_diff:%d\n",
PE2_SLAVE_MIVR_DIFF);
pe2->pe2_slave_mivr_diff = PE2_SLAVE_MIVR_DIFF;
}
if (of_property_read_u32(np, "dual_polling_ieoc", &val) >= 0)
pe2->dual_polling_ieoc = val;
else {
pr_notice("use default dual_polling_ieoc :%d\n", 750000);
pe2->dual_polling_ieoc = 750000;
}
}
int _pe2_get_prop(struct chg_alg_device *alg,
enum chg_alg_props s, int *value)
{
pr_notice("%s\n", __func__);
if (s == ALG_MAX_VBUS)
*value = 10000;
else
pr_notice("%s does not support prop:%d\n", __func__, s);
return 0;
}
int _pe2_set_prop(struct chg_alg_device *alg,
enum chg_alg_props s, int value)
{
pr_notice("%s %d %d\n", __func__, s, value);
return 0;
}
int _pe2_set_setting(struct chg_alg_device *alg_dev,
struct chg_limit_setting *setting)
{
struct mtk_pe20 *pe2;
pe2_dbg("%s cv:%d icl:%d,%d cc:%d,%d\n",
__func__,
setting->cv,
setting->input_current_limit1,
setting->input_current_limit2,
setting->charging_current_limit1,
setting->charging_current_limit2);
pe2 = dev_get_drvdata(&alg_dev->dev);
mutex_lock(&pe2->access_lock);
__pm_stay_awake(pe2->suspend_lock);
pe2->cv = setting->cv;
pe2->input_current_limit1 = setting->input_current_limit1;
pe2->charging_current_limit1 = setting->charging_current_limit1;
pe2->input_current_limit2 = setting->input_current_limit2;
pe2->charging_current_limit2 = setting->charging_current_limit2;
__pm_relax(pe2->suspend_lock);
mutex_unlock(&pe2->access_lock);
return 0;
}
static struct chg_alg_ops pe2_alg_ops = {
.init_algo = _pe2_init_algo,
.is_algo_ready = _pe2_is_algo_ready,
.start_algo = _pe2_start_algo,
.is_algo_running = _pe2_is_algo_running,
.stop_algo = _pe2_stop_algo,
.notifier_call = _pe2_notifier_call,
.get_prop = _pe2_get_prop,
.set_prop = _pe2_set_prop,
.set_current_limit = _pe2_set_setting,
};
static int mtk_pe2_probe(struct platform_device *pdev)
{
struct mtk_pe20 *pe2 = NULL;
pr_notice("%s: starts\n", __func__);
pe2 = devm_kzalloc(&pdev->dev, sizeof(*pe2), GFP_KERNEL);
if (!pe2)
return -ENOMEM;
platform_set_drvdata(pdev, pe2);
pe2->pdev = pdev;
pe2->suspend_lock =
wakeup_source_register(NULL, "PE+20 suspend wakelock");
mutex_init(&pe2->access_lock);
mutex_init(&pe2->cable_out_lock);
mutex_init(&pe2->data_lock);
pe2->ta_vchr_org = 5000000;
pe2->idx = -1;
pe2->vbus = 5000000;
pe2->state = PE2_HW_UNINIT;
mtk_pe2_parse_dt(pe2, &pdev->dev);
pe2->bat_psy = devm_power_supply_get_by_phandle(&pdev->dev, "gauge");
if (IS_ERR_OR_NULL(pe2->bat_psy))
pe2_err("%s: devm power fail to get bat_psy\n", __func__);
pe2->profile[0].vbat = 3400000;
pe2->profile[1].vbat = 3500000;
pe2->profile[2].vbat = 3600000;
pe2->profile[3].vbat = 3700000;
pe2->profile[4].vbat = 3800000;
pe2->profile[5].vbat = 3900000;
pe2->profile[6].vbat = 4000000;
pe2->profile[7].vbat = 4100000;
pe2->profile[8].vbat = 4200000;
pe2->profile[9].vbat = 4300000;
/*
pe2->profile[0].vchr = 8000000;
pe2->profile[1].vchr = 8500000;
pe2->profile[2].vchr = 8500000;
pe2->profile[3].vchr = 9000000;
pe2->profile[4].vchr = 9000000;
pe2->profile[5].vchr = 9000000;
pe2->profile[6].vchr = 9500000;
pe2->profile[7].vchr = 9500000;
pe2->profile[8].vchr = 10000000;
pe2->profile[9].vchr = 10000000;
*/
pe2->profile[0].vchr = 8000000;
pe2->profile[1].vchr = 8000000;
pe2->profile[2].vchr = 8000000;
pe2->profile[3].vchr = 8500000;
pe2->profile[4].vchr = 8500000;
pe2->profile[5].vchr = 8500000;
pe2->profile[6].vchr = 9000000;
pe2->profile[7].vchr = 9000000;
pe2->profile[8].vchr = 9500000;
pe2->profile[9].vchr = 9500000;
pe2->alg = chg_alg_device_register("pe2", &pdev->dev,
pe2, &pe2_alg_ops, NULL);
return 0;
}
static int mtk_pe2_remove(struct platform_device *dev)
{
return 0;
}
static void mtk_pe2_shutdown(struct platform_device *dev)
{
}
static const struct of_device_id mtk_pe2_of_match[] = {
{.compatible = "mediatek,charger,pe2",},
{},
};
MODULE_DEVICE_TABLE(of, mtk_pe2_of_match);
struct platform_device pe2_device = {
.name = "pe2",
.id = -1,
};
static struct platform_driver pe2_driver = {
.probe = mtk_pe2_probe,
.remove = mtk_pe2_remove,
.shutdown = mtk_pe2_shutdown,
.driver = {
.name = "pe2",
.of_match_table = mtk_pe2_of_match,
},
};
static int __init mtk_pe2_init(void)
{
return platform_driver_register(&pe2_driver);
}
late_initcall(mtk_pe2_init);
static void __exit mtk_pe2_exit(void)
{
platform_driver_unregister(&pe2_driver);
}
module_exit(mtk_pe2_exit);
MODULE_AUTHOR("wy.chuang <wy.chuang@mediatek.com>");
MODULE_DESCRIPTION("MTK Pump Express 2 algorithm Driver");
MODULE_LICENSE("GPL");
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