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113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* Copyright (c) 2016 embedded brains GmbH & Co. KG
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <bsp.h>
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#include <bsp/power.h>
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#include <bsp/irq.h>
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#include <libchip/chip.h>
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void atsam_power_change_state(
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const atsam_power_control *controls,
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size_t n,
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atsam_power_state state
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)
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{
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size_t i;
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switch (state) {
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case ATSAM_POWER_ON:
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for (i = n; i > 0; --i) {
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const atsam_power_control *c;
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c = &controls[i - 1];
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(*c->handler)(c, state);
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}
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break;
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case ATSAM_POWER_INIT:
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case ATSAM_POWER_OFF:
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for (i = 0; i < n; ++i) {
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const atsam_power_control *c;
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c = &controls[i];
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(*c->handler)(c, state);
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}
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break;
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default:
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break;
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}
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}
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void atsam_power_handler_peripheral(
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const atsam_power_control *control,
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atsam_power_state state
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)
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{
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uint32_t id;
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uint32_t end;
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id = control->data.peripherals.first;
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end = control->data.peripherals.last + 1;
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switch (state) {
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case ATSAM_POWER_ON:
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while (id != end) {
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PMC_EnablePeripheral(id);
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++id;
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}
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break;
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case ATSAM_POWER_OFF:
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while (id != end) {
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PMC_DisablePeripheral(id);
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++id;
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}
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break;
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default:
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break;
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}
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}
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void atsam_power_handler_sleep_mode(const atsam_power_control *control, atsam_power_state state)
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{
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(void) control;
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switch (state) {
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case ATSAM_POWER_OFF:
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/* Enable Low Power Mode in the Fast Startup Mode Register */
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PMC->PMC_FSMR &= (uint32_t)~PMC_FSMR_LPM;
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/* Do not set deep sleep, but "normal" sleep */
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SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
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__asm__ volatile ("wfi");
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break;
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default:
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break;
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}
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}
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