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mtd: bcm47xxpart: support TRX data partition being UBI 

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Rafał Miłecki 2014-12-01 18:50:20 +01:00 committed by Brian Norris
parent 548cd3ab54
commit bd10c26a4e
1 changed files with 26 additions and 2 deletions
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28
drivers/mtd/bcm47xxpart.c
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@ -40,6 +40,7 @@
#define ML_MAGIC2 0x26594131
#define TRX_MAGIC 0x30524448
#define SQSH_MAGIC 0x71736873 /* shsq */
#define UBI_EC_MAGIC 0x23494255 /* UBI# */
struct trx_header {
uint32_t magic;
@ -50,7 +51,7 @@ struct trx_header {
uint32_t offset[3];
} __packed;
static void bcm47xxpart_add_part(struct mtd_partition *part, char *name,
static void bcm47xxpart_add_part(struct mtd_partition *part, const char *name,
u64 offset, uint32_t mask_flags)
{
part->name = name;
@ -58,6 +59,26 @@ static void bcm47xxpart_add_part(struct mtd_partition *part, char *name,
part->mask_flags = mask_flags;
}
static const char *bcm47xxpart_trx_data_part_name(struct mtd_info *master,
size_t offset)
{
uint32_t buf;
size_t bytes_read;
if (mtd_read(master, offset, sizeof(buf), &bytes_read,
(uint8_t *)&buf) < 0) {
pr_err("mtd_read error while parsing (offset: 0x%X)!\n",
offset);
goto out_default;
}
if (buf == UBI_EC_MAGIC)
return "ubi";
out_default:
return "rootfs";
}
static int bcm47xxpart_parse(struct mtd_info *master,
struct mtd_partition **pparts,
struct mtd_part_parser_data *data)
@ -186,8 +207,11 @@ static int bcm47xxpart_parse(struct mtd_info *master,
* we want to have jffs2 (overlay) in the same mtd.
*/
if (trx->offset[i]) {
const char *name;
name = bcm47xxpart_trx_data_part_name(master, offset + trx->offset[i]);
bcm47xxpart_add_part(&parts[curr_part++],
"rootfs",
name,
offset + trx->offset[i],
0);
i++;