static int eGon2_enter_standby(void)
{
volatile int i;
// __u8 power_int_status[5];
//限制standby充电电流
standby_get_dram_para();
eGon2_config_charge_current(1);
//设置VBUS充电不限流
// eGon2_power_vbus_cur_limit();
// //清除power的中断pending
// eGon2_power_int_query(power_int_status);
//处理中断
//__debug("standby int init\n");
standby_int_init();
//处理clock
standby_clock_store();
#ifdef STANDBY_CHECK_CRC
standby_before_check_crc();
#endif
#ifndef CONFIG_AW_FPGA_PLATFORM
//处理dram，之后不允许再访问dram
dram_power_save_process(&standby_dram_para);
//禁止drampll输出使能
standby_clock_drampll_ouput(0);
#endif
//切换到24M
standby_clock_to_source(24000000);
//__debug("after standby_clock_to_source\n");
//关闭所有pll输出
standby_clock_plldisable();
// __debug("after standby_clock_plldisable\n");
//降低电源电压输出
eGon2_power_set_dcdc2(DCDC2_STANDBY_VOL);
//__debug("after standby_clock_plldisable\n");
//eGon2_power_set_dcdc3(DCDC3_STANDBY_VOL);
//使能电源中断，等待唤醒
eGon2_power_int_enable();
//切换分频比全为0
standby_clock_divsetto0();
//__debug("after standby_clock_divsetto0 fail\n");
//切换apb1到32k
standby_clock_apb1_to_source(32000);
//切换时钟，关闭时钟
for(i=0;i<2000;i++);
standby_clock_to_source(32000);
//关闭24M晶振
standby_clock_24m_op(0);
return 0;
}
/*
*********************************************************************************************************
* STANDBY MAIN PROCESS ENTRY
*
* Description: standby main process entry.
*
* Arguments : arg pointer to the parameter that transfered from sys_pwm module.
*
* Returns : none
*
* Note :
*********************************************************************************************************
*/
int main(struct aw_pm_info *arg)
{
char *tmpPtr = (char *)&__bss_start;
if(!arg){
/* standby parameter is invalid */
return -1;
}
/* flush data and instruction tlb, there is 32 items of data tlb and 32 items of instruction tlb,
The TLB is normally allocated on a rotating basis. The oldest entry is always the next allocated */
standby_flush_tlb();
/* preload tlb for standby */
standby_preload_tlb();
/* clear bss segment */
do{*tmpPtr ++ = 0;}while(tmpPtr <= (char *)&__bss_end);
/* copy standby parameter from dram */
standby_memcpy(&pm_info, arg, sizeof(pm_info));
/* copy standby code & data to load tlb */
standby_memcpy((char *)&__standby_end, (char *)&__standby_start, (char *)&__bss_end - (char *)&__bss_start);
/* backup dram traning area */
standby_memcpy((char *)dram_traning_area_back, (char *)DRAM_BASE_ADDR, sizeof(__u32)*DRAM_TRANING_SIZE);
/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
/* init module before dram enter selfrefresh */
/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
/* initialise standby modules */
standby_clk_init();
standby_int_init();
standby_tmr_init();
standby_power_init();
/* init some system wake source */
if(pm_info.standby_para.event & SUSPEND_WAKEUP_SRC_EXINT){
standby_enable_int(INT_SOURCE_EXTNMI);
}
if(pm_info.standby_para.event & SUSPEND_WAKEUP_SRC_KEY){
standby_key_init();
standby_enable_int(INT_SOURCE_LRADC);
}
if(pm_info.standby_para.event & SUSPEND_WAKEUP_SRC_IR){
standby_ir_init();
standby_enable_int(INT_SOURCE_IR0);
standby_enable_int(INT_SOURCE_IR1);
}
if(pm_info.standby_para.event & SUSPEND_WAKEUP_SRC_ALARM){
//standby_alarm_init();???
standby_enable_int(INT_SOURCE_ALARM);
}
if(pm_info.standby_para.event & SUSPEND_WAKEUP_SRC_USB){
standby_usb_init();
standby_enable_int(INT_SOURCE_USB0);
}
if(pm_info.standby_para.event & SUSPEND_WAKEUP_SRC_TIMEOFF){
/* set timer for power off */
if(pm_info.standby_para.time_off) {
standby_tmr_set(pm_info.standby_para.time_off);
standby_enable_int(INT_SOURCE_TIMER0);
}
}
/* save stack pointer registger, switch stack to sram */
sp_backup = save_sp();
/* enable dram enter into self-refresh */
dram_power_save_process();
/* process standby */
standby();
/* enable watch-dog to preserve dram training failed */
standby_tmr_enable_watchdog();
/* restore dram */
dram_power_up_process();
/* disable watch-dog */
standby_tmr_disable_watchdog();
/* restore stack pointer register, switch stack back to dram */
restore_sp(sp_backup);
/* exit standby module */
if(pm_info.standby_para.event & SUSPEND_WAKEUP_SRC_USB){
standby_usb_exit();
}
if(pm_info.standby_para.event & SUSPEND_WAKEUP_SRC_IR){
standby_ir_exit();
}
if(pm_info.standby_para.event & SUSPEND_WAKEUP_SRC_ALARM){
//standby_alarm_exit();
}
if(pm_info.standby_para.event & SUSPEND_WAKEUP_SRC_KEY){
standby_key_exit();
}
standby_power_exit();
standby_tmr_exit();
standby_int_exit();
standby_clk_exit();
/* restore dram traning area */
standby_memcpy((char *)DRAM_BASE_ADDR, (char *)dram_traning_area_back, sizeof(__u32)*DRAM_TRANING_SIZE);
/* report which wake source wakeup system */
arg->standby_para.event = pm_info.standby_para.event;
return 0;
}
