QorIQ pre-PBL BootROM scans first 24 SD card sectors (each with fixed 512 bytes length) for boot signature. Implement same redundancy behavior in fsl_esdhc_spl driver to allow loading proper U-Boot when boot sector is not the first one.
Signed-off-by: Pali Rohár pali@kernel.org --- drivers/mmc/fsl_esdhc_spl.c | 25 ++++++++++++++++++------- 1 file changed, 18 insertions(+), 7 deletions(-)
diff --git a/drivers/mmc/fsl_esdhc_spl.c b/drivers/mmc/fsl_esdhc_spl.c index 0146a231b221..ea8f4cd66964 100644 --- a/drivers/mmc/fsl_esdhc_spl.c +++ b/drivers/mmc/fsl_esdhc_spl.c @@ -20,7 +20,6 @@ #define ESDHC_BOOT_IMAGE_ADDR 0x50 #define MBRDBR_BOOT_SIG_55 0x1fe #define MBRDBR_BOOT_SIG_AA 0x1ff -#define CONFIG_CFG_DATA_SECTOR 0
void mmc_spl_load_image(uint32_t offs, unsigned int size, void *vdst) @@ -62,11 +61,13 @@ void __noreturn mmc_boot(void) #ifndef CONFIG_FSL_CORENET uchar *tmp_buf; u32 blklen; + u32 blk_off; uchar val; #ifndef CONFIG_SPL_FSL_PBL u32 val32; #endif uint i, byte_num; + u32 sector; #endif u32 offset, code_len; struct mmc *mmc; @@ -86,30 +87,37 @@ void __noreturn mmc_boot(void) offset = CONFIG_SYS_MMC_U_BOOT_OFFS; #else blklen = mmc->read_bl_len; + if (blklen < 512) + blklen = 512; tmp_buf = malloc(blklen); if (!tmp_buf) { puts("spl: malloc memory failed!!\n"); hang(); } + + sector = 0; +again: memset(tmp_buf, 0, blklen);
/* * Read source addr from sd card */ - err = mmc->block_dev.block_read(&mmc->block_dev, - CONFIG_CFG_DATA_SECTOR, 1, tmp_buf); + blk_start = (sector * 512) / mmc->read_bl_len; + blk_off = (sector * 512) % mmc->read_bl_len; + blk_cnt = DIV_ROUND_UP(512, mmc->read_bl_len); + err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt, tmp_buf); if (err != 1) { puts("spl: mmc read failed!!\n"); hang(); }
#ifdef CONFIG_SPL_FSL_PBL - val = *(tmp_buf + MBRDBR_BOOT_SIG_55); + val = *(tmp_buf + blk_off + MBRDBR_BOOT_SIG_55); if (0x55 != val) { puts("spl: mmc MBR/DBR signature is not valid!!\n"); hang(); } - val = *(tmp_buf + MBRDBR_BOOT_SIG_AA); + val = *(tmp_buf + blk_off + MBRDBR_BOOT_SIG_AA); if (0xAA != val) { puts("spl: mmc MBR/DBR signature is not valid!!\n"); hang(); @@ -123,10 +131,13 @@ void __noreturn mmc_boot(void) byte_num = 4; val32 = 0; for (i = 0; i < byte_num; i++) { - val = *(tmp_buf + ESDHC_BOOT_SIGNATURE_OFF + i); + val = *(tmp_buf + blk_off + ESDHC_BOOT_SIGNATURE_OFF + i); val32 = (val32 << 8) + val; } if (val32 != ESDHC_BOOT_SIGNATURE) { + /* BOOT signature may be on the first 24 sectors (each being 512 bytes) */ + if (++sector < 24) + goto again; puts("spl: mmc BOOT signature is not valid!!\n"); hang(); } @@ -135,7 +146,7 @@ void __noreturn mmc_boot(void) byte_num = 4; offset = 0; for (i = 0; i < byte_num; i++) { - val = *(tmp_buf + ESDHC_BOOT_IMAGE_ADDR + i); + val = *(tmp_buf + blk_off + ESDHC_BOOT_IMAGE_ADDR + i); offset = (offset << 8) + val; } offset += CONFIG_SYS_MMC_U_BOOT_OFFS;