385 lines
14 KiB
C
385 lines
14 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <stddef.h>
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#include <sys/lock.h>
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#include "esp_attr.h"
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#include "esp_deep_sleep.h"
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#include "esp_log.h"
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#include "rom/cache.h"
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#include "rom/rtc.h"
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#include "rom/uart.h"
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#include "soc/cpu.h"
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#include "soc/rtc_cntl_reg.h"
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#include "soc/sens_reg.h"
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#include "soc/dport_reg.h"
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#include "driver/rtc_io.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "rtc.h"
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#include "sdkconfig.h"
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/**
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* Internal structure which holds all requested deep sleep parameters
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*/
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typedef struct {
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esp_deep_sleep_pd_option_t pd_options[ESP_PD_DOMAIN_MAX];
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uint64_t sleep_duration;
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uint32_t wakeup_triggers : 11;
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uint32_t ext1_trigger_mode : 1;
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uint32_t ext1_rtc_gpio_mask : 18;
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uint32_t ext0_trigger_level : 1;
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uint32_t ext0_rtc_gpio_num : 5;
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} deep_sleep_config_t;
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static deep_sleep_config_t s_config = {
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.pd_options = { ESP_PD_OPTION_AUTO, ESP_PD_OPTION_AUTO, ESP_PD_OPTION_AUTO },
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.wakeup_triggers = 0
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};
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/* Updating RTC_MEMORY_CRC_REG register via set_rtc_memory_crc()
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is not thread-safe. */
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static _lock_t lock_rtc_memory_crc;
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static const char* TAG = "deepsleep";
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static uint32_t get_power_down_flags();
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static void ext0_wakeup_prepare();
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static void ext1_wakeup_prepare();
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/* Wake from deep sleep stub
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See esp_deepsleep.h esp_wake_deep_sleep() comments for details.
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*/
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esp_deep_sleep_wake_stub_fn_t esp_get_deep_sleep_wake_stub(void)
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{
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_lock_acquire(&lock_rtc_memory_crc);
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uint32_t stored_crc = REG_READ(RTC_MEMORY_CRC_REG);
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set_rtc_memory_crc();
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uint32_t calc_crc = REG_READ(RTC_MEMORY_CRC_REG);
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REG_WRITE(RTC_MEMORY_CRC_REG, stored_crc);
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_lock_release(&lock_rtc_memory_crc);
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if(stored_crc == calc_crc) {
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return (esp_deep_sleep_wake_stub_fn_t)REG_READ(RTC_ENTRY_ADDR_REG);
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} else {
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return NULL;
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}
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}
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void esp_set_deep_sleep_wake_stub(esp_deep_sleep_wake_stub_fn_t new_stub)
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{
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_lock_acquire(&lock_rtc_memory_crc);
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REG_WRITE(RTC_ENTRY_ADDR_REG, (uint32_t)new_stub);
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set_rtc_memory_crc();
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_lock_release(&lock_rtc_memory_crc);
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}
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void RTC_IRAM_ATTR esp_default_wake_deep_sleep(void) {
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/* Clear MMU for CPU 0 */
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REG_SET_BIT(DPORT_PRO_CACHE_CTRL1_REG, DPORT_PRO_CACHE_MMU_IA_CLR);
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REG_CLR_BIT(DPORT_PRO_CACHE_CTRL1_REG, DPORT_PRO_CACHE_MMU_IA_CLR);
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#if CONFIG_ESP32_DEEP_SLEEP_WAKEUP_DELAY > 0
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// ROM code has not started yet, so we need to set delay factor
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// used by ets_delay_us first.
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ets_update_cpu_frequency_rom(ets_get_detected_xtal_freq() / 1000000);
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// This delay is configured in menuconfig, it can be used to give
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// the flash chip some time to become ready.
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ets_delay_us(CONFIG_ESP32_DEEP_SLEEP_WAKEUP_DELAY);
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#endif
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}
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void __attribute__((weak, alias("esp_default_wake_deep_sleep"))) esp_wake_deep_sleep(void);
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void esp_deep_sleep(uint64_t time_in_us)
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{
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esp_deep_sleep_enable_timer_wakeup(time_in_us);
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esp_deep_sleep_start();
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}
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void IRAM_ATTR esp_deep_sleep_start()
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{
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// Decide which power domains can be powered down
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uint32_t pd_flags = get_power_down_flags();
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// Shut down parts of RTC which may have been left enabled by the wireless drivers
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CLEAR_PERI_REG_MASK(RTC_CNTL_ANA_CONF_REG,
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RTC_CNTL_CKGEN_I2C_PU | RTC_CNTL_PLL_I2C_PU |
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RTC_CNTL_RFRX_PBUS_PU | RTC_CNTL_TXRF_I2C_PU);
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SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_SAR_M, 0, SENS_FORCE_XPD_SAR_S);
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// Configure pins for external wakeup
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if (s_config.wakeup_triggers & EXT_EVENT0_TRIG_EN) {
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ext0_wakeup_prepare();
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}
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if (s_config.wakeup_triggers & EXT_EVENT1_TRIG_EN) {
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ext1_wakeup_prepare();
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}
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// TODO: move timer wakeup configuration into a similar function
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// once rtc_sleep is opensourced.
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// Flush UARTs so that output is not lost due to APB frequency change
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uart_tx_wait_idle(0);
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uart_tx_wait_idle(1);
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uart_tx_wait_idle(2);
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if (esp_get_deep_sleep_wake_stub() == NULL) {
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esp_set_deep_sleep_wake_stub(esp_wake_deep_sleep);
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}
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rtc_set_cpu_freq(CPU_XTAL);
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uint32_t cycle_h = 0;
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uint32_t cycle_l = 0;
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// For timer wakeup, calibrate clock source against main XTAL
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// This is hardcoded to use 150kHz internal oscillator for now
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if (s_config.sleep_duration > 0) {
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uint32_t period = rtc_slowck_cali(CALI_RTC_MUX, 128);
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rtc_usec2rtc(s_config.sleep_duration >> 32, s_config.sleep_duration & UINT32_MAX,
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period, &cycle_h, &cycle_l);
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}
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// Enter deep sleep
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rtc_slp_prep_lite(pd_flags, 0);
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rtc_sleep(cycle_h, cycle_l, s_config.wakeup_triggers, 0);
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// Because RTC is in a slower clock domain than the CPU, it
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// can take several CPU cycles for the sleep mode to start.
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while (1) {
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;
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}
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}
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void system_deep_sleep(uint64_t) __attribute__((alias("esp_deep_sleep")));
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esp_err_t esp_deep_sleep_enable_ulp_wakeup()
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{
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#ifdef CONFIG_ULP_COPROC_ENABLED
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if(s_config.wakeup_triggers & RTC_TOUCH_TRIG_EN) {
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ESP_LOGE(TAG, "Conflict wake-up triggers: touch");
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return ESP_ERR_INVALID_STATE;
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}
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s_config.wakeup_triggers |= RTC_SAR_TRIG_EN;
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return ESP_OK;
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#else
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return ESP_ERR_INVALID_STATE;
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#endif
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}
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esp_err_t esp_deep_sleep_enable_timer_wakeup(uint64_t time_in_us)
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{
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s_config.wakeup_triggers |= RTC_TIMER_EXPIRE_EN;
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s_config.sleep_duration = time_in_us;
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return ESP_OK;
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}
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esp_err_t esp_deep_sleep_enable_touchpad_wakeup()
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{
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if (s_config.wakeup_triggers & (RTC_SAR_TRIG_EN | RTC_EXT_EVENT0_TRIG_EN)) {
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ESP_LOGE(TAG, "Conflict wake-up triggers: ulp/ext0");
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return ESP_ERR_INVALID_STATE;
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}
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s_config.wakeup_triggers |= RTC_TOUCH_TRIG_EN;
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return ESP_OK;
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}
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esp_err_t esp_deep_sleep_enable_ext0_wakeup(gpio_num_t gpio_num, int level)
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{
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if (level < 0 || level > 1) {
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return ESP_ERR_INVALID_ARG;
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}
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if (!RTC_GPIO_IS_VALID_GPIO(gpio_num)) {
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return ESP_ERR_INVALID_ARG;
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}
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if (s_config.wakeup_triggers & RTC_TOUCH_TRIG_EN) {
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ESP_LOGE(TAG, "Conflict wake-up triggers: touch");
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return ESP_ERR_INVALID_STATE;
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}
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s_config.ext0_rtc_gpio_num = rtc_gpio_desc[gpio_num].rtc_num;
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s_config.ext0_trigger_level = level;
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s_config.wakeup_triggers |= RTC_EXT_EVENT0_TRIG_EN;
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return ESP_OK;
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}
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static void ext0_wakeup_prepare()
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{
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int rtc_gpio_num = s_config.ext0_rtc_gpio_num;
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// Set GPIO to be used for wakeup
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REG_SET_FIELD(RTC_IO_EXT_WAKEUP0_REG, RTC_IO_EXT_WAKEUP0_SEL, rtc_gpio_num);
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// Set level which will trigger wakeup
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SET_PERI_REG_BITS(RTC_CNTL_EXT_WAKEUP_CONF_REG, 0x1,
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s_config.ext0_trigger_level, RTC_CNTL_EXT_WAKEUP0_LV_S);
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// Find GPIO descriptor in the rtc_gpio_desc table and configure the pad
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for (size_t gpio_num = 0; gpio_num < GPIO_PIN_COUNT; ++gpio_num) {
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const rtc_gpio_desc_t* desc = &rtc_gpio_desc[gpio_num];
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if (desc->rtc_num == rtc_gpio_num) {
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REG_SET_BIT(desc->reg, desc->mux);
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SET_PERI_REG_BITS(desc->reg, 0x3, 0, desc->func);
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REG_SET_BIT(desc->reg, desc->slpsel);
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REG_SET_BIT(desc->reg, desc->slpie);
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break;
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}
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}
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}
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esp_err_t esp_deep_sleep_enable_ext1_wakeup(uint64_t mask, esp_ext1_wakeup_mode_t mode)
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{
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if (mode > ESP_EXT1_WAKEUP_ANY_HIGH) {
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return ESP_ERR_INVALID_ARG;
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}
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// Translate bit map of GPIO numbers into the bit map of RTC IO numbers
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uint32_t rtc_gpio_mask = 0;
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for (int gpio = 0; mask; ++gpio, mask >>= 1) {
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if ((mask & 1) == 0) {
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continue;
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}
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if (!RTC_GPIO_IS_VALID_GPIO(gpio)) {
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ESP_LOGE(TAG, "Not an RTC IO: GPIO%d", gpio);
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return ESP_ERR_INVALID_ARG;
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}
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rtc_gpio_mask |= BIT(rtc_gpio_desc[gpio].rtc_num);
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}
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s_config.ext1_rtc_gpio_mask = rtc_gpio_mask;
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s_config.ext1_trigger_mode = mode;
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s_config.wakeup_triggers |= RTC_EXT_EVENT1_TRIG_EN;
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return ESP_OK;
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}
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static void ext1_wakeup_prepare()
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{
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// Configure all RTC IOs selected as ext1 wakeup inputs
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uint32_t rtc_gpio_mask = s_config.ext1_rtc_gpio_mask;
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for (int gpio = 0; gpio < GPIO_PIN_COUNT && rtc_gpio_mask != 0; ++gpio) {
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int rtc_pin = rtc_gpio_desc[gpio].rtc_num;
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if ((rtc_gpio_mask & BIT(rtc_pin)) == 0) {
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continue;
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}
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const rtc_gpio_desc_t* desc = &rtc_gpio_desc[gpio];
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// Route pad to RTC
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REG_SET_BIT(desc->reg, desc->mux);
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SET_PERI_REG_BITS(desc->reg, 0x3, 0, desc->func);
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// Pad configuration depends on RTC_PERIPH state in sleep mode
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if (s_config.pd_options[ESP_PD_DOMAIN_RTC_PERIPH] == ESP_PD_OPTION_ON) {
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// set input enable in sleep mode
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REG_SET_BIT(desc->reg, desc->slpie);
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// allow sleep status signal to control IE/SLPIE mux
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REG_SET_BIT(desc->reg, desc->slpsel);
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} else {
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// RTC_PERIPH will be disabled, so need to enable input and
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// lock pad configuration. Pullups/pulldowns also need to be disabled.
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REG_SET_BIT(desc->reg, desc->ie);
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REG_CLR_BIT(desc->reg, desc->pulldown);
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REG_CLR_BIT(desc->reg, desc->pullup);
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REG_SET_BIT(RTC_CNTL_HOLD_FORCE_REG, desc->hold);
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}
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// Keep track of pins which are processed to bail out early
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rtc_gpio_mask &= ~BIT(rtc_pin);
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}
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// Clear state from previous wakeup
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REG_SET_BIT(RTC_CNTL_EXT_WAKEUP1_REG, RTC_CNTL_EXT_WAKEUP1_STATUS_CLR);
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// Set pins to be used for wakeup
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REG_SET_FIELD(RTC_CNTL_EXT_WAKEUP1_REG, RTC_CNTL_EXT_WAKEUP1_SEL, s_config.ext1_rtc_gpio_mask);
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// Set logic function (any low, all high)
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SET_PERI_REG_BITS(RTC_CNTL_EXT_WAKEUP_CONF_REG, 0x1,
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s_config.ext1_trigger_mode, RTC_CNTL_EXT_WAKEUP1_LV_S);
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}
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uint64_t esp_deep_sleep_get_ext1_wakeup_status()
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{
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int wakeup_reason = REG_GET_FIELD(RTC_CNTL_WAKEUP_STATE_REG, RTC_CNTL_WAKEUP_CAUSE);
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if (wakeup_reason != RTC_EXT_EVENT1_TRIG) {
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return 0;
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}
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uint32_t status = REG_GET_FIELD(RTC_CNTL_EXT_WAKEUP1_STATUS_REG, RTC_CNTL_EXT_WAKEUP1_STATUS);
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// Translate bit map of RTC IO numbers into the bit map of GPIO numbers
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uint64_t gpio_mask = 0;
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for (int gpio = 0; gpio < GPIO_PIN_COUNT; ++gpio) {
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if (!RTC_GPIO_IS_VALID_GPIO(gpio)) {
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continue;
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}
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int rtc_pin = rtc_gpio_desc[gpio].rtc_num;
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if ((status & BIT(rtc_pin)) == 0) {
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continue;
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}
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gpio_mask |= BIT(gpio);
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}
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return gpio_mask;
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}
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esp_err_t esp_deep_sleep_pd_config(esp_deep_sleep_pd_domain_t domain,
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esp_deep_sleep_pd_option_t option)
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{
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if (domain >= ESP_PD_DOMAIN_MAX || option > ESP_PD_OPTION_AUTO) {
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return ESP_ERR_INVALID_ARG;
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}
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s_config.pd_options[domain] = option;
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return ESP_OK;
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}
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static uint32_t get_power_down_flags()
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{
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// Where needed, convert AUTO options to ON. Later interpret AUTO as OFF.
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// RTC_SLOW_MEM is needed for the ULP, so keep RTC_SLOW_MEM powered up if ULP
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// is used and RTC_SLOW_MEM is Auto.
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// If there is any data placed into .rtc.data or .rtc.bss segments, and
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// RTC_SLOW_MEM is Auto, keep it powered up as well.
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// These labels are defined in the linker script:
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extern int _rtc_data_start, _rtc_data_end, _rtc_bss_start, _rtc_bss_end;
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if (s_config.pd_options[ESP_PD_DOMAIN_RTC_SLOW_MEM] == ESP_PD_OPTION_AUTO ||
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&_rtc_data_end > &_rtc_data_start ||
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&_rtc_bss_end > &_rtc_bss_start) {
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s_config.pd_options[ESP_PD_DOMAIN_RTC_SLOW_MEM] = ESP_PD_OPTION_ON;
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}
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// RTC_FAST_MEM is needed for deep sleep stub.
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// If RTC_FAST_MEM is Auto, keep it powered on, so that deep sleep stub
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// can run.
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// In the new chip revision, deep sleep stub will be optional,
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// and this can be changed.
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if (s_config.pd_options[ESP_PD_DOMAIN_RTC_FAST_MEM] == ESP_PD_OPTION_AUTO) {
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s_config.pd_options[ESP_PD_DOMAIN_RTC_FAST_MEM] = ESP_PD_OPTION_ON;
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}
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// RTC_PERIPH is needed for EXT0 wakeup and for ULP.
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// If RTC_PERIPH is auto, and both EXT0 and ULP aren't enabled,
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// power down RTC_PERIPH.
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if (s_config.pd_options[ESP_PD_DOMAIN_RTC_PERIPH] == ESP_PD_OPTION_AUTO) {
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if (s_config.wakeup_triggers &
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(RTC_SAR_TRIG_EN | RTC_EXT_EVENT0_TRIG_EN)) {
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s_config.pd_options[ESP_PD_DOMAIN_RTC_PERIPH] = ESP_PD_OPTION_ON;
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} else if (s_config.wakeup_triggers & RTC_TOUCH_TRIG_EN) {
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// We have to set power down PERIPH so as to enable wake-up from touch sensor.
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s_config.pd_options[ESP_PD_DOMAIN_RTC_PERIPH] = ESP_PD_OPTION_OFF;
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}
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}
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const char* option_str[] = {"OFF", "ON", "AUTO(OFF)" /* Auto works as OFF */};
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ESP_LOGD(TAG, "RTC_PERIPH: %s, RTC_SLOW_MEM: %s, RTC_FAST_MEM: %s",
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option_str[s_config.pd_options[ESP_PD_DOMAIN_RTC_PERIPH]],
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option_str[s_config.pd_options[ESP_PD_DOMAIN_RTC_SLOW_MEM]],
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option_str[s_config.pd_options[ESP_PD_DOMAIN_RTC_FAST_MEM]]);
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// Prepare flags based on the selected options
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uint32_t pd_flags = DEEP_SLEEP_PD_NORMAL;
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if (s_config.pd_options[ESP_PD_DOMAIN_RTC_FAST_MEM] != ESP_PD_OPTION_ON) {
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pd_flags |= DEEP_SLEEP_PD_RTC_FAST_MEM;
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}
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if (s_config.pd_options[ESP_PD_DOMAIN_RTC_SLOW_MEM] != ESP_PD_OPTION_ON) {
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pd_flags |= DEEP_SLEEP_PD_RTC_SLOW_MEM;
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}
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if (s_config.pd_options[ESP_PD_DOMAIN_RTC_PERIPH] != ESP_PD_OPTION_ON) {
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pd_flags |= DEEP_SLEEP_PD_RTC_PERIPH;
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}
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return pd_flags;
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}
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