From 24a06c964fd457238f16531d8ed1b660c4341676 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Sat, 15 Aug 2015 21:51:33 +0200 Subject: sunxi_nand_spl: Add support for backup boot partitions The BROM does not care / use bad page markings, instead it deals with any bad pages in the first erase-block by simply trying to load "boot0" from the next erase-block. This commit implements the same strategy for the sunxi spl nand code, allowing it to boot from the backup boot partition when the main boot partition is bad (tested by erasing the main boot partition). Signed-off-by: Hans de Goede Acked-by: Ian Campbell --- drivers/mtd/nand/sunxi_nand_spl.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'drivers/mtd/nand/sunxi_nand_spl.c') diff --git a/drivers/mtd/nand/sunxi_nand_spl.c b/drivers/mtd/nand/sunxi_nand_spl.c index eee6c7b7ab..14320c4494 100644 --- a/drivers/mtd/nand/sunxi_nand_spl.c +++ b/drivers/mtd/nand/sunxi_nand_spl.c @@ -350,7 +350,23 @@ static int nand_read_buffer(uint32_t offs, unsigned int size, void *dest, int nand_spl_load_image(uint32_t offs, unsigned int size, void *dest) { + const uint32_t boot_offsets[] = { + 0 * 1024 * 1024 + CONFIG_SYS_NAND_U_BOOT_OFFS, + 1 * 1024 * 1024 + CONFIG_SYS_NAND_U_BOOT_OFFS, + 2 * 1024 * 1024 + CONFIG_SYS_NAND_U_BOOT_OFFS, + 4 * 1024 * 1024 + CONFIG_SYS_NAND_U_BOOT_OFFS, + }; int syndrome = offs < CONFIG_NAND_SUNXI_SPL_SYNDROME_PARTITIONS_END; + int i; + + if (offs == CONFIG_SYS_NAND_U_BOOT_OFFS) { + for (i = 0; i < ARRAY_SIZE(boot_offsets); i++) { + if (nand_read_buffer(boot_offsets[i], size, + dest, syndrome) == 0) + return 0; + } + return -1; + } return nand_read_buffer(offs, size, dest, syndrome); } -- cgit