contiki/cpu/cc26xx-cc13xx/dev/aux-ctrl.c

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2016-04-19 21:16:56 +00:00
/*
* Copyright (c) 2016, University of Bristol - http://www.bris.ac.uk/
* 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.
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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 HOLDER 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 "contiki.h"
#include "dev/aux-ctrl.h"
#include "lib/list.h"
#include "ti-lib.h"
#include <stdint.h>
#include <stdbool.h>
/*---------------------------------------------------------------------------*/
LIST(consumers_list);
/*---------------------------------------------------------------------------*/
void
aux_ctrl_register_consumer(aux_consumer_module_t *consumer)
{
bool interrupts_disabled = ti_lib_int_master_disable();
list_add(consumers_list, consumer);
aux_ctrl_power_up();
ti_lib_aux_wuc_clock_enable(consumer->clocks);
while(ti_lib_aux_wuc_clock_status(consumer->clocks) != AUX_WUC_CLOCK_READY);
if(!interrupts_disabled) {
ti_lib_int_master_enable();
}
}
/*---------------------------------------------------------------------------*/
void
aux_ctrl_unregister_consumer(aux_consumer_module_t *consumer)
{
bool interrupts_disabled = ti_lib_int_master_disable();
list_remove(consumers_list, consumer);
aux_ctrl_power_down(false);
if(!interrupts_disabled) {
ti_lib_int_master_enable();
}
}
/*---------------------------------------------------------------------------*/
void
aux_ctrl_power_up()
{
/* Don't if we have no consumers */
if(list_head(consumers_list) == NULL) {
return;
}
ti_lib_aon_wuc_aux_wakeup_event(AONWUC_AUX_WAKEUP);
while(!(ti_lib_aon_wuc_power_status_get() & AONWUC_AUX_POWER_ON));
}
/*---------------------------------------------------------------------------*/
void
aux_ctrl_power_down(bool force)
{
aux_consumer_module_t *consumer;
uint32_t clocks_in_use = 0;
if(!force) {
/* Visit all modules and release clocks */
for(consumer = list_head(consumers_list); consumer != NULL;
consumer = consumer->next) {
clocks_in_use |= consumer->clocks;
}
/* If any clocks are still in use, AUX needs to stay powered and clocked */
if(clocks_in_use) {
ti_lib_aon_wuc_aux_power_down_config(AONWUC_CLOCK_SRC_LF);
return;
}
}
/* No clock for AUX in power down */
ti_lib_aon_wuc_aux_power_down_config(AONWUC_NO_CLOCK);
/* Disable retention */
ti_lib_aon_wuc_aux_sram_config(false);
/* Turn off AUX */
ti_lib_aon_wuc_aux_wakeup_event(AONWUC_AUX_ALLOW_SLEEP);
ti_lib_aux_wuc_power_ctrl(AUX_WUC_POWER_OFF);
while(ti_lib_aon_wuc_power_status_get() & AONWUC_AUX_POWER_ON);
}
/*---------------------------------------------------------------------------*/