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/*
* Copyright (c) 2016 embedded brains GmbH. All rights reserved.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <bsp.h>
#include <bsp/power.h>
#include <bsp/irq.h>
#include <libchip/chip.h>
void atsam_power_change_state(
const atsam_power_control *controls,
size_t n,
atsam_power_state state
)
{
size_t i;
switch (state) {
case ATSAM_POWER_ON:
for (i = n; i > 0; --i) {
const atsam_power_control *c;
c = &controls[i - 1];
(*c->handler)(c, state);
}
break;
case ATSAM_POWER_INIT:
case ATSAM_POWER_OFF:
for (i = 0; i < n; ++i) {
const atsam_power_control *c;
c = &controls[i];
(*c->handler)(c, state);
}
break;
default:
break;
}
}
void atsam_power_handler_peripheral(
const atsam_power_control *control,
atsam_power_state state
)
{
uint32_t id;
uint32_t end;
id = control->data.peripherals.first;
end = control->data.peripherals.last + 1;
switch (state) {
case ATSAM_POWER_ON:
while (id != end) {
PMC_EnablePeripheral(id);
++id;
}
break;
case ATSAM_POWER_OFF:
while (id != end) {
PMC_DisablePeripheral(id);
++id;
}
break;
default:
break;
}
}
void atsam_power_handler_sleep_mode(const atsam_power_control *control, atsam_power_state state)
{
(void) control;
switch (state) {
case ATSAM_POWER_OFF:
/* Enable Low Power Mode in the Fast Startup Mode Register */
PMC->PMC_FSMR &= (uint32_t)~PMC_FSMR_LPM;
/* Do not set deep sleep, but "normal" sleep */
SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
__asm__ volatile ("wfi");
break;
default:
break;
}
}
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