u-boot/drivers/mtd/spi/sf_mtd.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

103 lines
2.2 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2012-2014 Daniel Schwierzeck, daniel.schwierzeck@gmail.com
*/
#include <common.h>
#include <malloc.h>
#include <linux/errno.h>
#include <linux/mtd/mtd.h>
#include <spi_flash.h>
static struct mtd_info sf_mtd_info;
static char sf_mtd_name[8];
static int spi_flash_mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
{
struct spi_flash *flash = mtd->priv;
int err;
instr->state = MTD_ERASING;
err = spi_flash_erase(flash, instr->addr, instr->len);
if (err) {
instr->state = MTD_ERASE_FAILED;
instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
return -EIO;
}
instr->state = MTD_ERASE_DONE;
mtd_erase_callback(instr);
return 0;
}
static int spi_flash_mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf)
{
struct spi_flash *flash = mtd->priv;
int err;
err = spi_flash_read(flash, from, len, buf);
if (!err)
*retlen = len;
return err;
}
static int spi_flash_mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf)
{
struct spi_flash *flash = mtd->priv;
int err;
err = spi_flash_write(flash, to, len, buf);
if (!err)
*retlen = len;
return err;
}
static void spi_flash_mtd_sync(struct mtd_info *mtd)
{
}
static int spi_flash_mtd_number(void)
{
#ifdef CONFIG_SYS_MAX_FLASH_BANKS
return CONFIG_SYS_MAX_FLASH_BANKS;
#else
return 0;
#endif
}
int spi_flash_mtd_register(struct spi_flash *flash)
{
memset(&sf_mtd_info, 0, sizeof(sf_mtd_info));
sprintf(sf_mtd_name, "nor%d", spi_flash_mtd_number());
sf_mtd_info.name = sf_mtd_name;
sf_mtd_info.type = MTD_NORFLASH;
sf_mtd_info.flags = MTD_CAP_NORFLASH;
sf_mtd_info.writesize = 1;
sf_mtd_info.writebufsize = flash->page_size;
sf_mtd_info._erase = spi_flash_mtd_erase;
sf_mtd_info._read = spi_flash_mtd_read;
sf_mtd_info._write = spi_flash_mtd_write;
sf_mtd_info._sync = spi_flash_mtd_sync;
sf_mtd_info.size = flash->size;
sf_mtd_info.priv = flash;
/* Only uniform flash devices for now */
sf_mtd_info.numeraseregions = 0;
sf_mtd_info.erasesize = flash->sector_size;
return add_mtd_device(&sf_mtd_info);
}
void spi_flash_mtd_unregister(void)
{
del_mtd_device(&sf_mtd_info);
}