mirror of
https://github.com/espressif/esp-idf.git
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hebinglin
92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/*
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* SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stdint.h>
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#include "sdkconfig.h"
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#include "esp_err.h"
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#include "esp_log.h"
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#include "esp_attr.h"
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#include "spi_flash_chip_generic.h"
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#include "hal/spi_flash_hal.h"
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/*******************************************************************************
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* Flash deep power-down mode.
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* DPD: Deep power-down mode.
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* TDP: CS high to deep power-down mode duration.
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* TRES1: CS high to standby mode without ID read duration.
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*
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* Different flash chips might have different deep power-down strategy.
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* 1. Most flash chips send B9H to enter DPD and send ABH to exist DPD.
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* 2. Some flash chips send ABH followed by 3-dummy bytes to get device ID.
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* 3. Some flash chips send B9H to enter PD(power-down) → send 79H to enter UDPD(ultra-deep power-down mode); send FFH to exit UDPD → send ABH to exit PD (ABH).
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* 4. Some flash chips do nothing.
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******************************************************************************/
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__attribute__((unused)) const static char *DPD_TAG = "flash DPD";
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#ifdef CONFIG_ESP_SLEEP_SPI_FLASH_ENTER_DPD_MODE_DELAY
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#define SPI_FLASH_TDP_SAFE_VAL_US CONFIG_ESP_SLEEP_SPI_FLASH_ENTER_DPD_MODE_DELAY
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#else
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#define SPI_FLASH_TDP_SAFE_VAL_US (25)
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#endif
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#ifdef CONFIG_ESP_SLEEP_SPI_FLASH_EXIT_DPD_MODE_DELAY
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#define SPI_FLASH_TRES1_SAFE_VAL_US CONFIG_ESP_SLEEP_SPI_FLASH_EXIT_DPD_MODE_DELAY
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#else
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#define SPI_FLASH_TRES1_SAFE_VAL_US (40)
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#endif
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/*
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* Note: This file should only be compiled when DPD_ON, which is only available when (!APP_BUILD_TYPE_PURE_RAM_APP && !ESP_SLEEP_POWER_DOWN_FLASH).
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* However when DPD_ON, there are still some cases this file is not actually used:
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* TODO: PM-623
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*/
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uint32_t spi_flash_dpd_get_enter_duration(void)
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{
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#ifndef CONFIG_ESP_SLEEP_SPI_FLASH_ENTER_DPD_MODE_DELAY
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ESP_EARLY_LOGW(DPD_TAG, "No DPD enter delay value defined. Using default safe delay value. Verify with your flash datasheet.");
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#endif
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return SPI_FLASH_TDP_SAFE_VAL_US;
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}
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uint32_t spi_flash_dpd_get_exit_duration(void)
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{
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#ifndef CONFIG_ESP_SLEEP_SPI_FLASH_EXIT_DPD_MODE_DELAY
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ESP_EARLY_LOGW(DPD_TAG, "No DPD exit delay value defined. Using default safe delay value. Verify with your flash datasheet.");
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#endif
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return SPI_FLASH_TRES1_SAFE_VAL_US;
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}
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static esp_err_t spi_flash_enter_dpd(void)
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{
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esp_err_t ret = spi_flash_hal_enter_dpd_mode(esp_flash_default_chip->host);
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esp_rom_delay_us(spi_flash_dpd_get_enter_duration());
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return ret;
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}
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static esp_err_t spi_flash_exit_dpd(void)
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{
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esp_err_t ret = spi_flash_hal_exit_dpd_mode(esp_flash_default_chip->host);
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esp_rom_delay_us(spi_flash_dpd_get_exit_duration());
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return ret;
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}
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esp_err_t spi_flash_enable_deep_power_down_mode(bool enable)
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{
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esp_err_t ret = ESP_OK;
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if (enable) {
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ret = spi_flash_enter_dpd();
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} else {
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ret = spi_flash_exit_dpd();
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}
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return ret;
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}
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