/*
* ======== Power_shutdown ========
*/
Power_Status Power_shutdown(UArg arg)
{
Power_Status status = Power_EFAIL;
Bool exitNow = FALSE;
UInt32 constraints;
UInt hwiKey;
/* make sure shutdown request doesn't violate a constraint */
constraints = Power_getConstraintInfo();
if ((constraints & (Power_SD_DISALLOW)) != 0) {
status = Power_ECHANGE_NOT_ALLOWED;
}
if (status == Power_EFAIL) {
/* make sure Power is not still busy with a previous transition */
hwiKey = Hwi_disable();
if (Power_module->state == Power_ACTIVE) {
/* set new transition state to entering shutdown */
Power_module->state = Power_SHUTDOWN;
}
else {
exitNow = TRUE;
}
Hwi_restore(hwiKey);
if (exitNow == TRUE) {
status = Power_EBUSY;
}
else {
/* disable interrupts as start the shutdown sequence */
Hwi_disable();
/* signal all clients registered for pre-shutdown notification */
status = Power_notify(Power_ENTERING_SHUTDOWN);
/* check for any error */
if (status != Power_SOK) {
Power_module->state = Power_ACTIVE;
CPUcpsie();
return (status);
}
/* proceed with shutdown sequence ... */
/* switch to RCOSC_HF and RCOSC_LF */
OSCInterfaceEnable();
if(OSCClockSourceGet(OSC_SRC_CLK_HF) != OSC_RCOSC_HF) {
OSCClockSourceSet(OSC_SRC_CLK_HF | OSC_SRC_CLK_MF,
OSC_RCOSC_HF);
while(!OSCHfSourceReady());
OSCHfSourceSwitch();
}
OSCClockSourceSet(OSC_SRC_CLK_LF,OSC_RCOSC_LF);
while(OSCClockSourceGet(OSC_SRC_CLK_LF) != OSC_RCOSC_LF);
OSCInterfaceDisable();
/* make sure DMA and CRYTO clocks are off in deep-sleep */
PRCMPeripheralDeepSleepDisable(PRCM_PERIPH_CRYPTO);
PRCMPeripheralDeepSleepDisable(PRCM_PERIPH_UDMA);
PRCMLoadSet();
while(!PRCMLoadGet()){};
/* power OFF AUX and disconnect from bus */
AUXWUCPowerCtrl(AUX_WUC_POWER_OFF);
/* remove AUX force ON */
HWREG(AON_WUC_BASE + AON_WUC_O_AUXCTL) &=
~AON_WUC_AUXCTL_AUX_FORCE_ON;
/*
* reset AON event source IDs to avoid pending events powering
* on MCU/AUX
*/
HWREG(AON_EVENT_BASE + AON_EVENT_O_MCUWUSEL) = 0x3F3F3F3F;
HWREG(AON_EVENT_BASE + AON_EVENT_O_AUXWUSEL) = 0x003F3F3F;
/* sync AON */
HWREG(AON_RTC_BASE + AON_RTC_O_SYNC);
/*
* enable shutdown - this latches the IOs, so configuration of
* IOCFGx registers must be done prior to this
*/
AONWUCShutDownEnable();
/* sync AON */
HWREG(AON_RTC_BASE + AON_RTC_O_SYNC);
/* wait until AUX powered off */
while (AONWUCPowerStatusGet() & AONWUC_AUX_POWER_ON);
/* request to power off MCU when go to deep sleep */
PRCMMcuPowerOff();
/* turn off power domains inside MCU VD (BUS, FL_BUS, RFC, CPU) */
PRCMPowerDomainOff(PRCM_DOMAIN_RFCORE | PRCM_DOMAIN_SERIAL |
PRCM_DOMAIN_PERIPH | PRCM_DOMAIN_CPU | PRCM_DOMAIN_VIMS);
/* deep sleep to activate shutdown */
PRCMDeepSleep();
}
}
Power_module->state = Power_ACTIVE;
/* if get here failed to shutdown, return failure code */
return (Power_EFAIL);
}
//*****************************************************************************
//
// Force the system in to low power modes.
//
//*****************************************************************************
void
PowerCtrlStateSet(uint32_t ui32Powerstate)
{
//
// Check the arguments.
//
ASSERT((ui32Powerstate == PWRCTRL_STANDBY) ||
(ui32Powerstate == PWRCTRL_POWER_DOWN) ||
(ui32Powerstate == PWRCTRL_SHUTDOWN));
//
// Configure the desired power state.
//
if(ui32Powerstate == PWRCTRL_STANDBY)
{
//
//
// Turn of all power domains in the MCU voltage domain. This is
// necessary to conserve power before switching to the uLDO.
//
PRCMPowerDomainOff(PRCM_DOMAIN_RFCORE | PRCM_DOMAIN_SERIAL |
PRCM_DOMAIN_PERIPH | PRCM_DOMAIN_CPU |
PRCM_DOMAIN_VIMS);
//
// Make sure to request power off of the JTAG domain.
//
AONWUCJtagPowerOff();
//
// Configuration of clock source for MCU and AUX in standby mode.
//
AONWUCMcuPowerDownConfig(AONWUC_CLOCK_SRC_LF);
AONWUCAuxPowerDownConfig(AONWUC_CLOCK_SRC_LF);
//
// Configure the recharge controller and request the uLDO as power
// source.
//
AONWUCRechargeCtrlConfigSet(true, 34, 2500, 5000);
//
// Enable AUX power down
// This will tell the system that no HF source is needed and will
// allow the system to use the low-leakage/effect power supply.
// NB. This does not allow co-existence of an independent
// Sensor Controller.
//
AUXWUCPowerCtrl(AUX_WUC_POWER_DOWN);
while(AONWUCPowerStatusGet() & AONWUC_AUX_POWER_ON);
//
// Request the uLDO for standby power consumption.
//
PowerCtrlSourceSet(PWRCTRL_PWRSRC_ULDO);
//
// Sync the AON interface to ensure all writes have gone through
//
HWREG(AON_RTC_BASE + AON_RTC_O_SYNC);
//
// Enable transition to standby.
//
PRCMDeepSleep();
}
else if(ui32Powerstate == PWRCTRL_POWER_DOWN)
{
//
// Latch the current IO configuration before going to sleep to ensure
// the IOs retain their value even after boot and reset of the
// configuration.
//
AONIOCFreezeEnable();
//
// Make sure retention on MCU SRAM is on - on pr. default.
//
AONWUCMcuSRamConfig(MCU_RAM0_RETENTION | MCU_RAM1_RETENTION |
MCU_RAM2_RETENTION | MCU_RAM3_RETENTION);
//
// Allow power off on all domains in the MCU voltage domain.
// This is necessary to conserve power before switching to the uLDO.
//
PRCMPowerDomainOff(PRCM_DOMAIN_RFCORE | PRCM_DOMAIN_SERIAL |
PRCM_DOMAIN_PERIPH | PRCM_DOMAIN_CPU |
PRCM_DOMAIN_VIMS);
//
// Turn off the MCU voltage domain. This will not take effect until System CPU
// is in deep sleep.
//
PRCMMcuPowerOff();
//
// Set the wake up mode - default value coming out of reset
//
AONWUCMcuWakeUpConfig(MCU_IMM_WAKE_UP);
//
// VIRTUAL POWER OFF DISABLE is the default value coming out of reset
//
AONWUCMcuPowerOffConfig(MCU_VIRT_PWOFF_DISABLE);
//
// Configure the recharge controller and request the uLDO as power
// source.
// Recommended maximum numbers for lowest power consumption
// AdaptRate = 96
// MaxPeriod = 21440
// InitPeriod = 14816
//
AONWUCRechargeCtrlConfigSet(true, 75, 5000, 7500);
//
// Enable AUX power down with LF clock source
// Turn off JTAG domain and enable powerdown - values are default.
//
AONWUCAuxPowerDownConfig(AONWUC_CLOCK_SRC_LF);
AUXWUCPowerCtrl(AUX_WUC_POWER_DOWN);
AONWUCDomainPowerDownEnable();
while(AONWUCPowerStatusGet() & AONWUC_AUX_POWER_ON);
//
// Sync the AON interface to ensure all writes have gone through
//
HWREG(AON_RTC_BASE + AON_RTC_O_SYNC);
//
// Enable transition to power down.
//
PRCMDeepSleep();
}
else
{
//
// Latch the current IO configuration before going to sleep to ensure
// the IOs retain their value even after boot and reset of the
// configuration.
//
AONIOCFreezeEnable();
//
// Turn of all power domains in the MCU voltage domain.
//
PRCMPowerDomainOff(PRCM_DOMAIN_RFCORE | PRCM_DOMAIN_SERIAL |
PRCM_DOMAIN_PERIPH | PRCM_DOMAIN_CPU |
PRCM_DOMAIN_VIMS);
//
// Turn off the MCU voltage domain. This will not take effect until System CPU
// is in deep sleep.
//
PRCMMcuPowerOff();
//
// Set the wake up mode of MCU to immediate
//
AONWUCMcuWakeUpConfig(MCU_IMM_WAKE_UP);
AONWUCMcuPowerOffConfig(MCU_VIRT_PWOFF_DISABLE);
//
// Turn off the AUX domain and wait for power to be off.
//
// Is this required for shutdown mode? or will AUX automatically
// power off.
AUXWUCPowerCtrl(AUX_WUC_POWER_OFF);
while(AONWUCPowerStatusGet() & AONWUC_AUX_POWER_ON)
{ }
//
// Latch the IOs in the padring before going to sleep to retain their
// value even after boot and reset of the configuration.
//
PowerCtrlIOFreezeEnable();
//
// Enable shutdown and make sure the AON interface is in sync on the
// 32kHz clock.
//
AONWUCShutDownEnable();
//
// Sync the AON interface to ensure all writes have gone through
//
HWREG(AON_RTC_BASE + AON_RTC_O_SYNC);
//
// Enable transition to shutdown.
//
PRCMDeepSleep();
}
}
