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Commit 4f8aaf72 authored by Rafał Miłecki's avatar Rafał Miłecki Committed by Brian Norris
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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: default avatarRafał Miłecki <zajec5@gmail.com>
Signed-off-by: default avatarBrian Norris <computersforpeace@gmail.com>
parent 7f11b4d4

drivers/mtd/bcm47xxpart.c

+5 −3
Original line number Diff line number Diff line
@@ -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;