a94685a222
Allows booting in QIO/QOUT mode or with PSRAM on ESP32-PICO-V3 and ESP32-PICO-V3-O2 without any config changes. Custom WP pins (needed for fully custom circuit boards) should still be compatible.
89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
// Copyright 2018 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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#pragma once
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#include "sdkconfig.h"
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#include "esp_image_format.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Update the flash id in g_rom_flashchip(global esp_rom_spiflash_chip_t structure).
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*
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* @return None
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*/
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void bootloader_flash_update_id(void);
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/**
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* @brief Set the flash CS setup and hold time.
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*
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* @note CS setup time is recomemded to be 1.5T, and CS hold time is recommended to be 2.5T.
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* cs_setup = 1, cs_setup_time = 0; cs_hold = 1, cs_hold_time = 1.
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*
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* @return None
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*/
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void bootloader_flash_cs_timing_config(void);
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/**
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* @brief Configure SPI flash clock.
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*
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* @note This function only set clock frequency for SPI0.
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*
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* @param pfhdr Pointer to App image header, from where to fetch flash settings.
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*
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* @return None
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*/
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void bootloader_flash_clock_config(const esp_image_header_t* pfhdr);
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/**
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* @brief Configure SPI flash gpio, include the IO matrix and drive strength configuration.
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*
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* @param pfhdr Pointer to App image header, from where to fetch flash settings.
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*
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* @return None
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*/
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void bootloader_flash_gpio_config(const esp_image_header_t* pfhdr);
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/**
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* @brief Configure SPI flash read dummy based on different mode and frequency.
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*
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* @param pfhdr Pointer to App image header, from where to fetch flash settings.
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*
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* @return None
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*/
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void bootloader_flash_dummy_config(const esp_image_header_t* pfhdr);
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#ifdef CONFIG_IDF_TARGET_ESP32
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/**
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* @brief Return the pin number used for custom SPI flash and/or SPIRAM WP pin
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*
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* Can be determined by eFuse values in most cases, or overriden in configuration
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*
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* This value is only meaningful if the other SPI flash pins are overriden via eFuse.
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*
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* This value is only meaningful if flash is set to QIO or QOUT mode, or if
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* SPIRAM is enabled.
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*
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* @return Pin number to use, or -1 if the default should be kept
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*/
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int bootloader_flash_get_wp_pin(void);
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#endif
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#ifdef __cplusplus
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}
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#endif
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