aboutsummaryrefslogtreecommitdiff
path: root/drivers/mtd
diff options
context:
space:
mode:
authorHans de Goede2015-08-31 16:00:56 +0200
committerHans de Goede2015-09-29 11:50:07 +0200
commit31c5614af406bdb686c305d707eee2a0898d864e (patch)
tree779f2000898ffa6339a026ca592a40b3948e6fa3 /drivers/mtd
parentf3b589c09b43a231706f11ab391e5ea7f9670f12 (diff)
sunxi_nand_spl: Be smarter about where to look for backup u-boot.bin
We know when u-boot is written to its own partition, in this case the layout always is: eb 0 spl eb 1 spl-backup eb 2 u-boot eb 3 u-boot-backup eb: erase-block So if we cannot load u-boot from its primary offset we know exactly where to look for it. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/sunxi_nand_spl.c26
1 files changed, 20 insertions, 6 deletions
diff --git a/drivers/mtd/nand/sunxi_nand_spl.c b/drivers/mtd/nand/sunxi_nand_spl.c
index 5985534e5f1..b0e07aa2d08 100644
--- a/drivers/mtd/nand/sunxi_nand_spl.c
+++ b/drivers/mtd/nand/sunxi_nand_spl.c
@@ -356,18 +356,32 @@ 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)
{
+#if CONFIG_SYS_NAND_U_BOOT_OFFS == CONFIG_SPL_PAD_TO
+ /*
+ * u-boot-dtb.bin appended to SPL, use syndrome (like the BROM does)
+ * and try different erase block sizes to find the backup.
+ */
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 i, syndrome;
-
- if (CONFIG_SYS_NAND_U_BOOT_OFFS == CONFIG_SPL_PAD_TO)
- syndrome = 1; /* u-boot-dtb.bin appended to SPL */
- else
- syndrome = 0; /* u-boot-dtb.bin on its own partition */
+ const int syndrome = 1;
+#else
+ /*
+ * u-boot-dtb.bin on its own partition, do not use syndrome, u-boot
+ * partition sits after 2 eraseblocks (spl, spl-backup), look for
+ * backup u-boot 1 erase block further.
+ */
+ const uint32_t eraseblock_size = CONFIG_SYS_NAND_U_BOOT_OFFS / 2;
+ const uint32_t boot_offsets[] = {
+ CONFIG_SYS_NAND_U_BOOT_OFFS,
+ CONFIG_SYS_NAND_U_BOOT_OFFS + eraseblock_size,
+ };
+ const int syndrome = 0;
+#endif
+ int i;
if (offs == CONFIG_SYS_NAND_U_BOOT_OFFS) {
for (i = 0; i < ARRAY_SIZE(boot_offsets); i++) {