486 lines
15 KiB
C
486 lines
15 KiB
C
/*
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* Copyright (c) 2014, Texas Instruments Incorporated - http://www.ti.com/
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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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/**
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* \addtogroup cc26xx-lpm
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* @{
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*
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* Implementation of CC13xx/CC26xx low-power operation functionality
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*
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* @{
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*
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* \file
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* Driver for CC13xx/CC26xx low-power operation
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*/
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/*---------------------------------------------------------------------------*/
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#include "prcm.h"
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#include "contiki-conf.h"
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#include "ti-lib.h"
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#include "lpm.h"
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#include "sys/energest.h"
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#include "lib/list.h"
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#include "dev/leds.h"
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#include "dev/watchdog.h"
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#include "dev/soc-rtc.h"
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#include "dev/oscillators.h"
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#include <stdint.h>
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#include <string.h>
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/*---------------------------------------------------------------------------*/
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#if ENERGEST_CONF_ON
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static unsigned long irq_energest = 0;
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#define ENERGEST_IRQ_SAVE(a) do { \
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a = energest_type_time(ENERGEST_TYPE_IRQ); } while(0)
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#define ENERGEST_IRQ_RESTORE(a) do { \
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energest_type_set(ENERGEST_TYPE_IRQ, a); } while(0)
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#else
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#define ENERGEST_IRQ_SAVE(a) do {} while(0)
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#define ENERGEST_IRQ_RESTORE(a) do {} while(0)
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#endif
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/*---------------------------------------------------------------------------*/
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LIST(modules_list);
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/*---------------------------------------------------------------------------*/
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/* PDs that may stay on in deep sleep */
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#define LOCKABLE_DOMAINS ((uint32_t)(PRCM_DOMAIN_SERIAL | PRCM_DOMAIN_PERIPH))
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/*---------------------------------------------------------------------------*/
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/*
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* Don't consider standby mode if the next AON RTC event is scheduled to fire
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* in less than STANDBY_MIN_DURATION rtimer ticks
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*/
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#define STANDBY_MIN_DURATION (RTIMER_SECOND >> 11)
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/*---------------------------------------------------------------------------*/
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/* Prototype of a function in clock.c. Called every time we come out of DS */
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void clock_update(void);
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/*---------------------------------------------------------------------------*/
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void
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lpm_shutdown(uint32_t wakeup_pin, uint32_t io_pull, uint32_t wake_on)
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{
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lpm_registered_module_t *module;
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int i, j;
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uint32_t io_cfg = (IOC_STD_INPUT & ~IOC_IOPULL_M) | io_pull |
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wake_on;
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/* This procedure may not be interrupted */
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ti_lib_int_master_disable();
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/* Disable the RTC */
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ti_lib_aon_rtc_disable();
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ti_lib_aon_rtc_event_clear(AON_RTC_CH0);
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ti_lib_aon_rtc_event_clear(AON_RTC_CH1);
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ti_lib_aon_rtc_event_clear(AON_RTC_CH2);
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/* Reset AON even fabric to default wakeup sources */
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for(i = AON_EVENT_MCU_WU0; i <= AON_EVENT_MCU_WU3; i++) {
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ti_lib_aon_event_mcu_wake_up_set(i, AON_EVENT_NONE);
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}
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for(i = AON_EVENT_AUX_WU0; i <= AON_EVENT_AUX_WU2; i++) {
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ti_lib_aon_event_aux_wake_up_set(i, AON_EVENT_NONE);
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}
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ti_lib_sys_ctrl_aon_sync();
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watchdog_periodic();
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/* fade away....... */
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j = 1000;
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for(i = j; i > 0; --i) {
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leds_on(LEDS_ALL);
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clock_delay_usec(i);
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leds_off(LEDS_ALL);
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clock_delay_usec(j - i);
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}
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leds_off(LEDS_ALL);
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/* Notify all modules that we're shutting down */
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for(module = list_head(modules_list); module != NULL;
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module = module->next) {
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if(module->shutdown) {
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module->shutdown(LPM_MODE_SHUTDOWN);
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}
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}
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/* Configure the wakeup trigger */
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ti_lib_gpio_dir_mode_set((1 << wakeup_pin), GPIO_DIR_MODE_IN);
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ti_lib_ioc_port_configure_set(wakeup_pin, IOC_PORT_GPIO, io_cfg);
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/* Freeze I/O latches in AON */
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ti_lib_aon_ioc_freeze_enable();
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/* Turn off RFCORE, SERIAL and PERIPH PDs. This will happen immediately */
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ti_lib_prcm_power_domain_off(PRCM_DOMAIN_RFCORE | PRCM_DOMAIN_SERIAL |
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PRCM_DOMAIN_PERIPH);
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oscillators_switch_to_hf_rc();
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oscillators_select_lf_rcosc();
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/* Configure clock sources for MCU and AUX: No clock */
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ti_lib_aon_wuc_mcu_power_down_config(AONWUC_NO_CLOCK);
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ti_lib_aon_wuc_aux_power_down_config(AONWUC_NO_CLOCK);
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/* Disable SRAM and AUX retentions */
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ti_lib_aon_wuc_mcu_sram_config(0);
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ti_lib_aon_wuc_aux_sram_config(false);
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/*
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* Request CPU, SYSBYS and VIMS PD off.
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* This will only happen when the CM3 enters deep sleep
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*/
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ti_lib_prcm_power_domain_off(PRCM_DOMAIN_CPU | PRCM_DOMAIN_VIMS |
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PRCM_DOMAIN_SYSBUS);
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/* Request JTAG domain power off */
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ti_lib_aon_wuc_jtag_power_off();
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/* Turn off AUX */
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ti_lib_aux_wuc_power_ctrl(AUX_WUC_POWER_OFF);
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ti_lib_aon_wuc_domain_power_down_enable();
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while(ti_lib_aon_wuc_power_status_get() & AONWUC_AUX_POWER_ON);
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/*
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* Request MCU VD power off.
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* This will only happen when the CM3 enters deep sleep
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*/
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ti_lib_prcm_mcu_power_off();
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/* Set MCU wakeup to immediate and disable virtual power off */
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ti_lib_aon_wuc_mcu_wake_up_config(MCU_IMM_WAKE_UP);
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ti_lib_aon_wuc_mcu_power_off_config(MCU_VIRT_PWOFF_DISABLE);
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/* Latch the IOs in the padring and enable I/O pad sleep mode */
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ti_lib_pwr_ctrl_io_freeze_enable();
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/* Turn off VIMS cache, CRAM and TRAM - possibly not required */
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ti_lib_prcm_cache_retention_disable();
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ti_lib_vims_mode_set(VIMS_BASE, VIMS_MODE_OFF);
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/* Enable shutdown and sync AON */
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ti_lib_aon_wuc_shut_down_enable();
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ti_lib_sys_ctrl_aon_sync();
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/* Deep Sleep */
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ti_lib_prcm_deep_sleep();
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}
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/*---------------------------------------------------------------------------*/
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/*
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* Notify all modules that we're back on and rely on them to restore clocks
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* and power domains as required.
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*/
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static void
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wake_up(void)
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{
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lpm_registered_module_t *module;
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/* Remember IRQ energest for next pass */
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ENERGEST_IRQ_SAVE(irq_energest);
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ENERGEST_ON(ENERGEST_TYPE_CPU);
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ENERGEST_OFF(ENERGEST_TYPE_LPM);
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/* Sync so that we get the latest values before adjusting recharge settings */
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ti_lib_sys_ctrl_aon_sync();
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/* Adjust recharge settings */
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ti_lib_sys_ctrl_adjust_recharge_after_power_down();
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/*
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* Release the request to the uLDO
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* This is likely not required, since the switch to GLDO/DCDC is automatic
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* when coming back from deep sleep
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*/
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ti_lib_prcm_mcu_uldo_configure(false);
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/* Turn on cache again */
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ti_lib_vims_mode_set(VIMS_BASE, VIMS_MODE_ENABLED);
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ti_lib_prcm_cache_retention_enable();
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ti_lib_aon_ioc_freeze_disable();
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ti_lib_sys_ctrl_aon_sync();
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/* Check operating conditions, optimally choose DCDC versus GLDO */
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ti_lib_sys_ctrl_dcdc_voltage_conditional_control();
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/*
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* We may or may not have been woken up by an AON RTC tick. If not, we need
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* to adjust our software tick counter
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*/
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clock_update();
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watchdog_periodic();
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/* Notify all registered modules that we've just woken up */
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for(module = list_head(modules_list); module != NULL;
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module = module->next) {
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if(module->wakeup) {
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module->wakeup();
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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lpm_drop()
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{
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lpm_registered_module_t *module;
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uint8_t max_pm = LPM_MODE_MAX_SUPPORTED;
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uint8_t module_pm;
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clock_time_t next_event;
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uint32_t domains = LOCKABLE_DOMAINS;
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if(RTIMER_CLOCK_LT(soc_rtc_get_next_trigger(),
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RTIMER_NOW() + STANDBY_MIN_DURATION)) {
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lpm_sleep();
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return;
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}
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/* Collect max allowed PM permission from interested modules */
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for(module = list_head(modules_list); module != NULL;
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module = module->next) {
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if(module->request_max_pm) {
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module_pm = module->request_max_pm();
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if(module_pm < max_pm) {
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max_pm = module_pm;
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}
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}
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}
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/* Check if any events fired during this process. Last chance to abort */
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if(process_nevents()) {
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return;
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}
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/* Drop */
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if(max_pm == LPM_MODE_SLEEP) {
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lpm_sleep();
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} else {
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/* Critical. Don't get interrupted! */
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ti_lib_int_master_disable();
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/*
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* Reschedule AON RTC CH1 to fire an event N ticks before the next etimer
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* event
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*/
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next_event = etimer_next_expiration_time();
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if(next_event) {
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next_event = next_event - clock_time();
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soc_rtc_schedule_one_shot(AON_RTC_CH1, RTIMER_NOW() +
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(next_event * (RTIMER_SECOND / CLOCK_SECOND)));
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}
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/*
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* Notify all registered modules that we are dropping to mode X. We do not
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* need to do this for simple sleep.
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*
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* This is a chance for modules to delay us a little bit until an ongoing
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* operation has finished (e.g. uart TX) or to configure themselves for
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* deep sleep.
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*
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* At this stage, we also collect power domain locks, if any.
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* The argument to PRCMPowerDomainOff() is a bitwise OR, so every time
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* we encounter a lock we just clear the respective bits in the 'domains'
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* variable as required by the lock. In the end the domains variable will
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* just hold whatever has not been cleared
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*/
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for(module = list_head(modules_list); module != NULL;
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module = module->next) {
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if(module->shutdown) {
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module->shutdown(max_pm);
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}
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/* Clear the bits specified in the lock */
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domains &= ~module->domain_lock;
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}
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/* Pat the dog: We don't want it to shout right after we wake up */
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watchdog_periodic();
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/* Clear unacceptable bits, just in case a lock provided a bad value */
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domains &= LOCKABLE_DOMAINS;
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/*
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* Freeze the IOs on the boundary between MCU and AON. We only do this if
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* PERIPH is not needed
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*/
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if(domains & PRCM_DOMAIN_PERIPH) {
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ti_lib_aon_ioc_freeze_enable();
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}
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/*
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* Among LOCKABLE_DOMAINS, turn off those that are not locked
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*
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* If domains is != 0, pass it as-is
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*/
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if(domains) {
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ti_lib_prcm_power_domain_off(domains);
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}
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/*
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* Before entering Deep Sleep, we must switch off the HF XOSC. The HF XOSC
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* is predominantly controlled by the RF driver. In a build with radio
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* cycling (e.g. ContikiMAC), the RF driver will request the XOSC before
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* using the Freq. Synth, and switch back to the RC when it is about to
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* turn back off.
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*
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* If the radio is on, we won't even reach here, and if it's off the HF
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* clock source should already be the HF RC.
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*
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* Nevertheless, request the switch to the HF RC explicitly here.
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*/
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oscillators_switch_to_hf_rc();
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/* Configure clock sources for MCU and AUX: No clock */
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ti_lib_aon_wuc_mcu_power_down_config(AONWUC_NO_CLOCK);
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ti_lib_aon_wuc_aux_power_down_config(AONWUC_NO_CLOCK);
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/* Full RAM retention. */
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ti_lib_aon_wuc_mcu_sram_config(MCU_RAM0_RETENTION | MCU_RAM1_RETENTION |
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MCU_RAM2_RETENTION | MCU_RAM3_RETENTION);
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/* Disable retention of AUX RAM */
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ti_lib_aon_wuc_aux_sram_config(false);
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/*
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* Always turn off RFCORE, CPU, SYSBUS and VIMS. RFCORE should be off
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* already
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*/
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ti_lib_prcm_power_domain_off(PRCM_DOMAIN_RFCORE | PRCM_DOMAIN_CPU |
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PRCM_DOMAIN_VIMS | PRCM_DOMAIN_SYSBUS);
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/* Request JTAG domain power off */
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ti_lib_aon_wuc_jtag_power_off();
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/* Turn off AUX */
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ti_lib_aux_wuc_power_ctrl(AUX_WUC_POWER_OFF);
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ti_lib_aon_wuc_domain_power_down_enable();
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while(ti_lib_aon_wuc_power_status_get() & AONWUC_AUX_POWER_ON);
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/* Configure the recharge controller */
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ti_lib_sys_ctrl_set_recharge_before_power_down(XOSC_IN_HIGH_POWER_MODE);
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/*
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* If both PERIPH and SERIAL PDs are off, request the uLDO as the power
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* source while in deep sleep.
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*/
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if(domains == LOCKABLE_DOMAINS) {
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ti_lib_pwr_ctrl_source_set(PWRCTRL_PWRSRC_ULDO);
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}
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/* We are only interested in IRQ energest while idle or in LPM */
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ENERGEST_IRQ_RESTORE(irq_energest);
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ENERGEST_OFF(ENERGEST_TYPE_CPU);
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ENERGEST_ON(ENERGEST_TYPE_LPM);
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/* Sync the AON interface to ensure all writes have gone through. */
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ti_lib_sys_ctrl_aon_sync();
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/*
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* Explicitly turn off VIMS cache, CRAM and TRAM. Needed because of
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* retention mismatch between VIMS logic and cache. We wait to do this
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* until right before deep sleep to be able to use the cache for as long
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* as possible.
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*/
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ti_lib_prcm_cache_retention_disable();
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ti_lib_vims_mode_set(VIMS_BASE, VIMS_MODE_OFF);
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/* Deep Sleep */
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ti_lib_prcm_deep_sleep();
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/*
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* When we reach here, some interrupt woke us up. The global interrupt
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* flag is off, hence we have a chance to run things here. We will wake up
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* the chip properly, and then we will enable the global interrupt without
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* unpending events so the handlers can fire
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*/
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wake_up();
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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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lpm_sleep(void)
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{
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ENERGEST_OFF(ENERGEST_TYPE_CPU);
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ENERGEST_ON(ENERGEST_TYPE_LPM);
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/* We are only interested in IRQ energest while idle or in LPM */
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ENERGEST_IRQ_RESTORE(irq_energest);
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/* Just to be on the safe side, explicitly disable Deep Sleep */
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HWREG(NVIC_SYS_CTRL) &= ~(NVIC_SYS_CTRL_SLEEPDEEP);
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ti_lib_prcm_sleep();
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/* Remember IRQ energest for next pass */
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ENERGEST_IRQ_SAVE(irq_energest);
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ENERGEST_ON(ENERGEST_TYPE_CPU);
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ENERGEST_OFF(ENERGEST_TYPE_LPM);
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}
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/*---------------------------------------------------------------------------*/
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void
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lpm_register_module(lpm_registered_module_t *module)
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{
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list_add(modules_list, module);
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}
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/*---------------------------------------------------------------------------*/
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void
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lpm_unregister_module(lpm_registered_module_t *module)
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{
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list_remove(modules_list, module);
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}
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/*---------------------------------------------------------------------------*/
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void
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lpm_init()
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{
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list_init(modules_list);
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/* Always wake up on any DIO edge detection */
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ti_lib_aon_event_mcu_wake_up_set(AON_EVENT_MCU_WU2, AON_EVENT_IO);
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}
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/*---------------------------------------------------------------------------*/
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void
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lpm_pin_set_default_state(uint32_t ioid)
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{
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if(ioid == IOID_UNUSED) {
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return;
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}
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ti_lib_ioc_port_configure_set(ioid, IOC_PORT_GPIO, IOC_STD_OUTPUT);
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ti_lib_gpio_dir_mode_set((1 << ioid), GPIO_DIR_MODE_IN);
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}
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/*---------------------------------------------------------------------------*/
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/**
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* @}
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* @}
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|
*/
|