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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (c) 2016 embedded brains GmbH. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#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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