mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 17:08:10 +00:00
91e81150d3
Instead of trying to parse CFE version string, which is customized by some vendors, let's just check that "CFE1" was passed on argument 3. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20200615091740.2958303-1-noltari@gmail.com
172 lines
4.4 KiB
C
172 lines
4.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* BCM63XX CFE image tag parser
|
|
*
|
|
* Copyright © 2006-2008 Florian Fainelli <florian@openwrt.org>
|
|
* Mike Albon <malbon@openwrt.org>
|
|
* Copyright © 2009-2010 Daniel Dickinson <openwrt@cshore.neomailbox.net>
|
|
* Copyright © 2011-2013 Jonas Gorski <jonas.gorski@gmail.com>
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/bcm963xx_nvram.h>
|
|
#include <linux/bcm963xx_tag.h>
|
|
#include <linux/crc32.h>
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/sizes.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/partitions.h>
|
|
#include <linux/of.h>
|
|
|
|
#ifdef CONFIG_MIPS
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/fw/cfe/cfe_api.h>
|
|
#endif /* CONFIG_MIPS */
|
|
|
|
#define BCM963XX_CFE_BLOCK_SIZE SZ_64K /* always at least 64KiB */
|
|
|
|
#define BCM963XX_CFE_MAGIC_OFFSET 0x4e0
|
|
#define BCM963XX_CFE_VERSION_OFFSET 0x570
|
|
#define BCM963XX_NVRAM_OFFSET 0x580
|
|
|
|
/* Ensure strings read from flash structs are null terminated */
|
|
#define STR_NULL_TERMINATE(x) \
|
|
do { char *_str = (x); _str[sizeof(x) - 1] = 0; } while (0)
|
|
|
|
static inline int bcm63xx_detect_cfe(void)
|
|
{
|
|
int ret = 0;
|
|
|
|
#ifdef CONFIG_MIPS
|
|
ret = (fw_arg3 == CFE_EPTSEAL);
|
|
#endif /* CONFIG_MIPS */
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int bcm63xx_read_nvram(struct mtd_info *master,
|
|
struct bcm963xx_nvram *nvram)
|
|
{
|
|
u32 actual_crc, expected_crc;
|
|
size_t retlen;
|
|
int ret;
|
|
|
|
/* extract nvram data */
|
|
ret = mtd_read(master, BCM963XX_NVRAM_OFFSET, BCM963XX_NVRAM_V5_SIZE,
|
|
&retlen, (void *)nvram);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = bcm963xx_nvram_checksum(nvram, &expected_crc, &actual_crc);
|
|
if (ret)
|
|
pr_warn("nvram checksum failed, contents may be invalid (expected %08x, got %08x)\n",
|
|
expected_crc, actual_crc);
|
|
|
|
if (!nvram->psi_size)
|
|
nvram->psi_size = BCM963XX_DEFAULT_PSI_SIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const char * const bcm63xx_cfe_part_types[] = {
|
|
"bcm963xx-imagetag",
|
|
NULL,
|
|
};
|
|
|
|
static int bcm63xx_parse_cfe_nor_partitions(struct mtd_info *master,
|
|
const struct mtd_partition **pparts, struct bcm963xx_nvram *nvram)
|
|
{
|
|
struct mtd_partition *parts;
|
|
int nrparts = 3, curpart = 0;
|
|
unsigned int cfelen, nvramlen;
|
|
unsigned int cfe_erasesize;
|
|
int i;
|
|
|
|
cfe_erasesize = max_t(uint32_t, master->erasesize,
|
|
BCM963XX_CFE_BLOCK_SIZE);
|
|
|
|
cfelen = cfe_erasesize;
|
|
nvramlen = nvram->psi_size * SZ_1K;
|
|
nvramlen = roundup(nvramlen, cfe_erasesize);
|
|
|
|
parts = kzalloc(sizeof(*parts) * nrparts + 10 * nrparts, GFP_KERNEL);
|
|
if (!parts)
|
|
return -ENOMEM;
|
|
|
|
/* Start building partition list */
|
|
parts[curpart].name = "CFE";
|
|
parts[curpart].offset = 0;
|
|
parts[curpart].size = cfelen;
|
|
curpart++;
|
|
|
|
parts[curpart].name = "nvram";
|
|
parts[curpart].offset = master->size - nvramlen;
|
|
parts[curpart].size = nvramlen;
|
|
curpart++;
|
|
|
|
/* Global partition "linux" to make easy firmware upgrade */
|
|
parts[curpart].name = "linux";
|
|
parts[curpart].offset = cfelen;
|
|
parts[curpart].size = master->size - cfelen - nvramlen;
|
|
parts[curpart].types = bcm63xx_cfe_part_types;
|
|
|
|
for (i = 0; i < nrparts; i++)
|
|
pr_info("Partition %d is %s offset %llx and length %llx\n", i,
|
|
parts[i].name, parts[i].offset, parts[i].size);
|
|
|
|
*pparts = parts;
|
|
|
|
return nrparts;
|
|
}
|
|
|
|
static int bcm63xx_parse_cfe_partitions(struct mtd_info *master,
|
|
const struct mtd_partition **pparts,
|
|
struct mtd_part_parser_data *data)
|
|
{
|
|
struct bcm963xx_nvram *nvram = NULL;
|
|
int ret;
|
|
|
|
if (!bcm63xx_detect_cfe())
|
|
return -EINVAL;
|
|
|
|
nvram = vzalloc(sizeof(*nvram));
|
|
if (!nvram)
|
|
return -ENOMEM;
|
|
|
|
ret = bcm63xx_read_nvram(master, nvram);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (!mtd_type_is_nand(master))
|
|
ret = bcm63xx_parse_cfe_nor_partitions(master, pparts, nvram);
|
|
else
|
|
ret = -EINVAL;
|
|
|
|
out:
|
|
vfree(nvram);
|
|
return ret;
|
|
};
|
|
|
|
static const struct of_device_id parse_bcm63xx_cfe_match_table[] = {
|
|
{ .compatible = "brcm,bcm963xx-cfe-nor-partitions" },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, parse_bcm63xx_cfe_match_table);
|
|
|
|
static struct mtd_part_parser bcm63xx_cfe_parser = {
|
|
.parse_fn = bcm63xx_parse_cfe_partitions,
|
|
.name = "bcm63xxpart",
|
|
.of_match_table = parse_bcm63xx_cfe_match_table,
|
|
};
|
|
module_mtd_part_parser(bcm63xx_cfe_parser);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Daniel Dickinson <openwrt@cshore.neomailbox.net>");
|
|
MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
|
|
MODULE_AUTHOR("Mike Albon <malbon@openwrt.org>");
|
|
MODULE_AUTHOR("Jonas Gorski <jonas.gorski@gmail.com");
|
|
MODULE_DESCRIPTION("MTD partitioning for BCM63XX CFE bootloaders");
|