linux/drivers/mtd/devices/sst25l.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * sst25l.c
 *
 * Driver for SST25L SPI Flash chips
 *
 * Copyright © 2009 Bluewater Systems Ltd
 * Author: Andre Renaud <[email protected]>
 * Author: Ryan Mallon
 *
 * Based on m25p80.c
 */

#include <linux/module.h>
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/sched.h>

#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>

#include <linux/spi/spi.h>
#include <linux/spi/flash.h>

/* Erases can take up to 3 seconds! */
#define MAX_READY_WAIT_JIFFIES …

#define SST25L_CMD_WRSR …
#define SST25L_CMD_WRDI …
#define SST25L_CMD_RDSR …
#define SST25L_CMD_WREN …
#define SST25L_CMD_READ …

#define SST25L_CMD_EWSR …
#define SST25L_CMD_SECTOR_ERASE …
#define SST25L_CMD_READ_ID …
#define SST25L_CMD_AAI_PROGRAM …

#define SST25L_STATUS_BUSY …
#define SST25L_STATUS_WREN …
#define SST25L_STATUS_BP0 …
#define SST25L_STATUS_BP1 …

struct sst25l_flash { … };

struct flash_info { … };

#define to_sst25l_flash(x) …

static struct flash_info sst25l_flash_info[] = …;

static int sst25l_status(struct sst25l_flash *flash, int *status)
{ … }

static int sst25l_write_enable(struct sst25l_flash *flash, int enable)
{ … }

static int sst25l_wait_till_ready(struct sst25l_flash *flash)
{ … }

static int sst25l_erase_sector(struct sst25l_flash *flash, uint32_t offset)
{ … }

static int sst25l_erase(struct mtd_info *mtd, struct erase_info *instr)
{ … }

static int sst25l_read(struct mtd_info *mtd, loff_t from, size_t len,
		       size_t *retlen, unsigned char *buf)
{ … }

static int sst25l_write(struct mtd_info *mtd, loff_t to, size_t len,
			size_t *retlen, const unsigned char *buf)
{ … }

static struct flash_info *sst25l_match_device(struct spi_device *spi)
{ … }

static int sst25l_probe(struct spi_device *spi)
{ … }

static void sst25l_remove(struct spi_device *spi)
{ … }

static struct spi_driver sst25l_driver = …;

module_spi_driver(…) …;

MODULE_DESCRIPTION(…) …;
MODULE_AUTHOR(…) …;
MODULE_LICENSE(…) …;