插入USB开机

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我是靠谱客的博主冷艳小猫咪，最近开发中收集的这篇文章主要介绍插入USB开机，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

客户要求：

1. 3.45以下lk充电

2. 3.45 - 3.6 kernel充电

3. 3.6以上自动开机

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vendormediatekproprietarybootablebootloaderlkplatformmt8163platform.c

void platform_init(void)

{

......

#ifdef LK_PROFILING

time_bat_init = get_timer(0);

#endif

mt65xx_bat_init(); //Isaac check if it's low battery!!!

......

#ifdef MTK_KERNEL_POWER_OFF_CHARGING

if (kernel_charging_boot() == 1) { //Isaac judge boot mode

......

}

vendormediatekproprietarybootablebootloaderlkplatformmt8163mt_battery.c

#if defined(CUST_BATTERY_LOWVOL_THRESOLD) //Isaac no

#define BATTERY_LOWVOL_THRESOLD CUST_BATTERY_LOWVOL_THRESOLD

#else

#define BATTERY_LOWVOL_THRESOLD 3450 //3450 Isaac

#endif

void mt65xx_bat_init(void)

{

kal_int32 bat_vol;

// Low Battery Safety Booting

#if defined(SWCHR_POWER_PATH)

bat_vol = get_i_sense_volt(1);

#else

bat_vol = get_bat_sense_volt(1);

#endif

pchr_turn_on_charging(KAL_TRUE);

//dprintf(CRITICAL, "[mt65xx_bat_init] check VBAT=%d mV with %d mVn", bat_vol, BATTERY_LOWVOL_THRESOLD);

printf("Isaac [mt65xx_bat_init] check VBAT=%d mV with %d mVn", bat_vol, BATTERY_LOWVOL_THRESOLD); //Isaac

if(g_boot_mode == KERNEL_POWER_OFF_CHARGING_BOOT && (upmu_get_pwrkey_deb()==0) ) {

dprintf(CRITICAL, "[mt65xx_bat_init] KPOC+PWRKEY => change boot moden");

g_boot_reason_change = true;

}

rtc_boot_check(false);

#ifndef MTK_DISABLE_POWER_ON_OFF_VOLTAGE_LIMITATION //Isaac no

#ifndef MTK_BATLOWV_NO_PANEL_ON_EARLY //Isaac no

if (bat_vol < BATTERY_LOWVOL_THRESOLD)

#else

if (is_low_battery(bat_vol))

#endif

{

if(g_boot_mode == KERNEL_POWER_OFF_CHARGING_BOOT && upmu_is_chr_det() == KAL_TRUE)

{

dprintf(CRITICAL, "[%s] Kernel Low Battery Power Off Charging Moden", __func__);

g_boot_mode = LOW_POWER_OFF_CHARGING_BOOT;

#ifndef SWCHR_POWER_PATH

check_bat_protect_status(); //Isaac LOOP CHARGE!!!

#endif

return;

}

else

{

dprintf(CRITICAL, "[BATTERY] battery voltage(%dmV) <= CLV ! Can not Boot Linux Kernel !! nr",bat_vol);

#ifndef NO_POWER_OFF

mt6575_power_off();

#endif

while(1)

{

dprintf(CRITICAL, "If you see the log, please check with RTC power off APInr");

}

#endif

return;

}

------------------------------------------------------------

vendormediatekproprietarybootablebootloaderlkplatformmt6580platform.c

int kernel_charging_boot(void)

{

//Isaac add for low power

int USB_BOOT_JUDGE = 0;

int My_bat_volt = get_bat_sense_volt(5);

if(My_bat_volt >=3590){

g_boot_mode = NORMAL_BOOT;

USB_BOOT_JUDGE = 1;

}

printf("Isaac My_bat_volt = %d, USB_BOOT_JUDGE = %dn", My_bat_volt, USB_BOOT_JUDGE);

//Isaac add for low power

if ((g_boot_mode == KERNEL_POWER_OFF_CHARGING_BOOT || g_boot_mode == LOW_POWER_OFF_CHARGING_BOOT) && upmu_is_chr_det() == KAL_TRUE) {

dprintf(INFO,"[%s] Kernel Power Off Charging with Charger/Usb n", __func__);

return 1;

} else if ((g_boot_mode == KERNEL_POWER_OFF_CHARGING_BOOT || g_boot_mode == LOW_POWER_OFF_CHARGING_BOOT) && upmu_is_chr_det() == KAL_FALSE) {

dprintf(INFO,"[%s] Kernel Power Off Charging without Charger/Usb n", __func__);

return -1;

} else

return 0;

}

kernel-3.18driverspowermediateklinear_charging.c

#include <mt-plat/mt_boot.h> //Isaac #include "mt_boot_common.h"

//Isaac add

#include <linux/reboot.h>

//#include <mt-plat/mt_boot_common.h> //boot_mode_t get_boot_mode()

//Isaac add

PMU_STATUS BAT_ConstantCurrentModeAction(void)

{

battery_log(BAT_LOG_CRTI, "[BATTERY] CC mode charge, timer=%d on %d !!nr",

BMT_status.CC_charging_time, BMT_status.total_charging_time);

BMT_status.PRE_charging_time = 0;

BMT_status.CC_charging_time += BAT_TASK_PERIOD;

BMT_status.TOPOFF_charging_time = 0;

BMT_status.total_charging_time += BAT_TASK_PERIOD;

ulc_cv_charging_current_flag = KAL_FALSE;

ulc_cv_charging_current = g_temp_CC_value;

printk("Isaac [BAT_ConstantCurrentModeAction] check VBAT=%d mVm, get_boot_mode() = %dn", BMT_status.bat_vol, get_boot_mode());

//Isaac add for low power charge

if ((BMT_status.bat_vol > 3620) && (get_boot_mode() == KERNEL_POWER_OFF_CHARGING_BOOT || get_boot_mode() == LOW_POWER_OFF_CHARGING_BOOT))

kernel_power_off();

//battery_charging_control(CHARGING_CMD_SET_POWER_OFF, NULL);

//Isaac add for low power charge

if (BMT_status.bat_vol > v_cc2topoff_threshold)

BMT_status.bat_charging_state = CHR_TOP_OFF;

#if defined(CONFIG_MTK_PUMP_EXPRESS_SUPPORT) /* defined(MTK_LINEAR_CHARGER_NO_DISCHARGE) */

/* no disable charging#else */

#else

{

kal_bool charging_enable = KAL_FALSE;

/* Charging 9s and discharging 1s : start */

battery_charging_control(CHARGING_CMD_ENABLE, &charging_enable);

msleep(1000);

}

#endif

charging_current_calibration();

pchr_turn_on_charging();

return PMU_STATUS_OK;

}

在kernel阶段判断的电压要比lk阶段的启动电压要大，否则kernel充电到3.6自动关机重启后电压只有3.58，lk阶段判断启动电压不满足，继续充电，3.6关机，死循环！！

REFERENCE:

3.45V 以下关机充电 g_boot_mode = LOW_POWER_OFF_CHARGING_BOOT //9

3.45V 以上关机充电 g_boot_mode = KERNEL_POWER_OFF_CHARGING_BOOT //8

kernel-3.18driversmiscmediatekincludemt-platmt_boot_common.h

/* return boot mode */

unsigned int get_boot_mode(void)

{

init_boot_common(__LINE__);

return g_boot_mode;

}

vendormediatekproprietarybootablebootloaderlkplatformmt8163includeplatformboot_mode.h

/* boot type definitions */

typedef enum

{

NORMAL_BOOT = 0,

META_BOOT = 1,

RECOVERY_BOOT = 2,

SW_REBOOT = 3,

FACTORY_BOOT = 4,

ADVMETA_BOOT = 5,

ATE_FACTORY_BOOT = 6,

ALARM_BOOT = 7,

#if defined (MTK_KERNEL_POWER_OFF_CHARGING)

KERNEL_POWER_OFF_CHARGING_BOOT = 8,

LOW_POWER_OFF_CHARGING_BOOT = 9,

#endif

FASTBOOT = 99,

DOWNLOAD_BOOT = 100,

UNKNOWN_BOOT

} BOOTMODE;

kernel-3.18driversmiscmediatekincludemt-platmt_boot_common.h

/* boot type definitions */

enum boot_mode_t {

NORMAL_BOOT = 0,

META_BOOT = 1,

RECOVERY_BOOT = 2,

SW_REBOOT = 3,

FACTORY_BOOT = 4,

ADVMETA_BOOT = 5,

ATE_FACTORY_BOOT = 6,

ALARM_BOOT = 7,

#if defined(CONFIG_MTK_KERNEL_POWER_OFF_CHARGING)

KERNEL_POWER_OFF_CHARGING_BOOT = 8,

LOW_POWER_OFF_CHARGING_BOOT = 9,

#endif

DONGLE_BOOT = 10,

UNKNOWN_BOOT

};

/vendor/mediatek/proprietary/bootable/bootloader/lk/platform/mt8163/mt_pmic_mt6323.c

int get_bat_sense_volt(int times)
{
return PMIC_IMM_GetOneChannelValue(VBAT_CHANNEL_NUMBER,times,1);
}

int get_i_sense_volt(int times)
{
return PMIC_IMM_GetOneChannelValue(ISENSE_CHANNEL_NUMBER,times,1);
}

int get_charger_volt(int times)
{
return PMIC_IMM_GetOneChannelValue(VCHARGER_CHANNEL_NUMBER,times,1);
}

int get_tbat_volt(int times)
{
return PMIC_IMM_GetOneChannelValue(VBATTEMP_CHANNEL_NUMBER,times,1);
}
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版权声明：本文为CSDN博主「0_0i_i」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/chylovecsd/article/details/125349862