117 lines
4 KiB
C
117 lines
4 KiB
C
/*
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* Copyright (c) 2016, University of Bristol - http://www.bris.ac.uk/
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* All rights reserved.
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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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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* 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
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*---------------------------------------------------------------------------*/
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#include "contiki.h"
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#include "dev/aux-ctrl.h"
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#include "lib/list.h"
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#include "ti-lib.h"
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#include <stdint.h>
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#include <stdbool.h>
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/*---------------------------------------------------------------------------*/
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LIST(consumers_list);
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/*---------------------------------------------------------------------------*/
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void
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aux_ctrl_register_consumer(aux_consumer_module_t *consumer)
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{
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bool interrupts_disabled = ti_lib_int_master_disable();
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list_add(consumers_list, consumer);
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aux_ctrl_power_up();
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ti_lib_aux_wuc_clock_enable(consumer->clocks);
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while(ti_lib_aux_wuc_clock_status(consumer->clocks) != AUX_WUC_CLOCK_READY);
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if(!interrupts_disabled) {
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ti_lib_int_master_enable();
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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aux_ctrl_unregister_consumer(aux_consumer_module_t *consumer)
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{
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bool interrupts_disabled = ti_lib_int_master_disable();
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list_remove(consumers_list, consumer);
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aux_ctrl_power_down(false);
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if(!interrupts_disabled) {
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ti_lib_int_master_enable();
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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aux_ctrl_power_up()
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{
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/* Don't if we have no consumers */
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if(list_head(consumers_list) == NULL) {
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return;
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}
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ti_lib_aon_wuc_aux_wakeup_event(AONWUC_AUX_WAKEUP);
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while(!(ti_lib_aon_wuc_power_status_get() & AONWUC_AUX_POWER_ON));
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}
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/*---------------------------------------------------------------------------*/
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void
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aux_ctrl_power_down(bool force)
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{
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aux_consumer_module_t *consumer;
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uint32_t clocks_in_use = 0;
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if(!force) {
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/* Visit all modules and release clocks */
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for(consumer = list_head(consumers_list); consumer != NULL;
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consumer = consumer->next) {
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clocks_in_use |= consumer->clocks;
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}
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/* If any clocks are still in use, AUX needs to stay powered and clocked */
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if(clocks_in_use) {
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ti_lib_aon_wuc_aux_power_down_config(AONWUC_CLOCK_SRC_LF);
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return;
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}
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}
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/* No clock for AUX in power down */
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ti_lib_aon_wuc_aux_power_down_config(AONWUC_NO_CLOCK);
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/* Disable retention */
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ti_lib_aon_wuc_aux_sram_config(false);
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/* Turn off AUX */
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ti_lib_aon_wuc_aux_wakeup_event(AONWUC_AUX_ALLOW_SLEEP);
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ti_lib_aux_wuc_power_ctrl(AUX_WUC_POWER_OFF);
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while(ti_lib_aon_wuc_power_status_get() & AONWUC_AUX_POWER_ON);
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}
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/*---------------------------------------------------------------------------*/
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