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mtd: bcm47xxpart: find boot partition by CFE magic 

Some devices have even nicer-to-recognize CFE thanks to the magic.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Rafał Miłecki 2013-12-21 19:39:11 +01:00 committed by Brian Norris
parent 7f11b4d411
commit 4f8aaf7228
1 changed files with 5 additions and 3 deletions
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8
drivers/mtd/bcm47xxpart.c
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@ -23,10 +23,11 @@
* Amount of bytes we read when analyzing each block of flash memory.
* Set it big enough to allow detecting partition and reading important data.
*/
#define BCM47XXPART_BYTES_TO_READ 0x404
#define BCM47XXPART_BYTES_TO_READ 0x4e8
/* Magics */
#define BOARD_DATA_MAGIC 0x5246504D /* MPFR */
#define CFE_MAGIC 0x43464531 /* 1EFC */
#define FACTORY_MAGIC 0x59544346 /* FCTY */
#define POT_MAGIC1 0x54544f50 /* POTT */
#define POT_MAGIC2 0x504f /* OP */
@ -102,8 +103,9 @@ static int bcm47xxpart_parse(struct mtd_info *master,
continue;
}
/* CFE has small NVRAM at 0x400 */
if (buf[0x400 / 4] == NVRAM_HEADER) {
/* Magic or small NVRAM at 0x400 */
if ((buf[0x4e0 / 4] == CFE_MAGIC && buf[0x4e4 / 4] == CFE_MAGIC) ||
(buf[0x400 / 4] == NVRAM_HEADER)) {
bcm47xxpart_add_part(&parts[curr_part++], "boot",
offset, MTD_WRITEABLE);
continue;