/**
* CP hold procedure
* 1. acquire fc mutex
* 2. stop watchdog
* 3. set bit CPR of register APRR to hold CP in reset
* 4. set bits DSPR, BBR and DSRAMINT of register CPRR to hold MSA in reset
* 5. wait several us
* 6. mask bits CP_CLK_OFF_ACK, CP_HALT of register APMU_DEBUG to
* disable ACK from CP
* 7. release fc mutex
*/
void cp_holdcp(void)
{
int value;
u8 apmu_debug;
acquire_fc_mutex();
printk("%s: acquire fc mutex\n", __func__);
watchDogCountStop();
printk("hold cp...");
value = __raw_readl(MPMU_APRR) | MPMU_APRR_CPR; //set CPR(bit[0]) bit of APRR register high
__raw_writel(value, MPMU_APRR);
printk("done!\n");
printk("hold msa...");
value = __raw_readl(MPMU_CPRR);
value |= MPMU_CPRR_DSPR | MPMU_CPRR_BBR | MPMU_CPRR_DSRAMINT; //set DSPR(bit[2]), BBR(bit[3]) and DSRAMINT(bit[5]) bits of CPRR register high
__raw_writel(value, MPMU_CPRR);
printk("done!\n");
//recommended software wait several us after hold CP/MSA in reset status and then start load the new image
//TODO: accurate the wait time
udelay(100);
/*
* mask CP_CLK_OFF_ACK and CP_HALT
*/
printk("%s: mask cp halt and cp clk off ack bit\n", __func__);
apmu_debug = __raw_readb(APMU_DEBUG);
printk("%s: APMU_DEBUG before %02x\n", __func__, apmu_debug);
apmu_debug |= (APMU_DEBUG_CP_HALT | APMU_DEBUG_CP_CLK_OFF_ACK);
__raw_writeb(apmu_debug, APMU_DEBUG);
printk("%s: APMU_DEBUG after %02x\n", __func__, __raw_readb(APMU_DEBUG));
release_fc_mutex();
printk("%s: release fc mutex\n", __func__);
}
WATCHDOG_HW_RETURN_CODE watchDogDeactive(void)
{
unsigned int wvc0, wvc1, match,wmer;
wvc0 = readl(comm_timer_base_addr + TMR_WVR);
wvc1 = readl(comm_timer_base_addr + TMR_WVR);
match = readl(comm_timer_base_addr + TMR_WMR);
printk("Watch Value Before stop_2:%x %x match=%x\n",wvc0,wvc1,match);
watchDogCountStop();//watchdog count stop
watchDogInterruptClear();
watchDogHWKick();
disable_irq_nosync(IRQ_COMM_WDT_ID);
wvc0 = readl(comm_timer_base_addr + TMR_WVR);
wvc1 = readl(comm_timer_base_addr + TMR_WVR);
match = readl(comm_timer_base_addr + TMR_WMR);
wmer = readl(comm_timer_base_addr + TMR_WMER);
printk("Watch Value After stop_2:%x %x match=%x wmer=%x\n",wvc0,wvc1,match, wmer);
return SUCCESSFUL;
}
