From 71c0b97bced7722abaa0adefd57066cc065538b5 Mon Sep 17 00:00:00 2001 From: Joy Lee Date: Sat, 12 Feb 2022 04:26:16 +0800 Subject: Added external spi flash driver. (#15419) --- drivers/flash/flash_spi.h | 136 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 136 insertions(+) create mode 100644 drivers/flash/flash_spi.h (limited to 'drivers/flash/flash_spi.h') diff --git a/drivers/flash/flash_spi.h b/drivers/flash/flash_spi.h new file mode 100644 index 0000000000..abe95e955e --- /dev/null +++ b/drivers/flash/flash_spi.h @@ -0,0 +1,136 @@ +/* +Copyright (C) 2021 Westberry Technology (ChangZhou) Corp., Ltd + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ + +#pragma once + +/* All the following default configurations are based on MX25L4006E Nor FLASH. */ + +/* + The slave select pin of the FLASH. + This needs to be a normal GPIO pin_t value, such as B14. +*/ +#ifndef EXTERNAL_FLASH_SPI_SLAVE_SELECT_PIN +# error "No chip select pin defined -- missing EXTERNAL_FLASH_SPI_SLAVE_SELECT_PIN" +#endif + +/* + The clock divisor for SPI to ensure that the MCU is within the + specifications of the FLASH chip. Generally this will be PCLK divided by + the intended divisor -- check your clock settings and the datasheet of + your FLASH. +*/ +#ifndef EXTERNAL_FLASH_SPI_CLOCK_DIVISOR +# ifdef __AVR__ +# define EXTERNAL_FLASH_SPI_CLOCK_DIVISOR 4 +# else +# define EXTERNAL_FLASH_SPI_CLOCK_DIVISOR 8 +# endif +#endif + +/* + The SPI mode to communicate with the FLASH. +*/ +#ifndef EXTERNAL_FLASH_SPI_MODE +# define EXTERNAL_FLASH_SPI_MODE 0 +#endif + +/* + Whether or not the SPI communication between the MCU and FLASH should be + LSB-first. +*/ +#ifndef EXTERNAL_FLASH_SPI_LSBFIRST +# define EXTERNAL_FLASH_SPI_LSBFIRST false +#endif + +/* + The Flash address size in bytes, as specified in datasheet. +*/ +#ifndef EXTERNAL_FLASH_ADDRESS_SIZE +# define EXTERNAL_FLASH_ADDRESS_SIZE 3 +#endif + +/* + The page size of the FLASH in bytes, as specified in the datasheet. +*/ +#ifndef EXTERNAL_FLASH_PAGE_SIZE +# define EXTERNAL_FLASH_PAGE_SIZE 256 +#endif + +/* + The sector size of the FLASH in bytes, as specified in the datasheet. +*/ +#ifndef EXTERNAL_FLASH_SECTOR_SIZE +# define EXTERNAL_FLASH_SECTOR_SIZE (4 * 1024) +#endif + +/* + The block size of the FLASH in bytes, as specified in the datasheet. +*/ +#ifndef EXTERNAL_FLASH_BLOCK_SIZE +# define EXTERNAL_FLASH_BLOCK_SIZE (64 * 1024) +#endif + +/* + The total size of the FLASH in bytes, as specified in the datasheet. +*/ +#ifndef EXTERNAL_FLASH_SIZE +# define EXTERNAL_FLASH_SIZE (512 * 1024) +#endif + +/* + The block count of the FLASH, calculated by total FLASH size and block size. +*/ +#define EXTERNAL_FLASH_BLOCK_COUNT ((EXTERNAL_FLASH_SIZE) / (EXTERNAL_FLASH_BLOCK_SIZE)) + +/* + The sector count of the FLASH, calculated by total FLASH size and sector size. +*/ +#define EXTERNAL_FLASH_SECTOR_COUNT ((EXTERNAL_FLASH_SIZE) / (EXTERNAL_FLASH_SECTOR_SIZE)) + +/* + The page count of the FLASH, calculated by total FLASH size and page size. +*/ +#define EXTERNAL_FLASH_PAGE_COUNT ((EXTERNAL_FLASH_SIZE) / (EXTERNAL_FLASH_PAGE_SIZE)) + +typedef int16_t flash_status_t; + +#define FLASH_STATUS_SUCCESS (0) +#define FLASH_STATUS_ERROR (-1) +#define FLASH_STATUS_TIMEOUT (-2) +#define FLASH_STATUS_BAD_ADDRESS (-3) + +#ifdef __cplusplus +extern "C" { +#endif + +#include + +void flash_init(void); + +flash_status_t flash_erase_chip(void); + +flash_status_t flash_erase_block(uint32_t addr); + +flash_status_t flash_erase_sector(uint32_t addr); + +flash_status_t flash_read_block(uint32_t addr, void *buf, size_t len); + +flash_status_t flash_write_block(uint32_t addr, const void *buf, size_t len); + +#ifdef __cplusplus +} +#endif -- cgit v1.2.3