From 0f58f033d410e91466723bb288d555c710de49fc Mon Sep 17 00:00:00 2001 From: =?utf8?q?Pali=20Roh=C3=A1r?= Date: Sun, 3 Apr 2022 00:16:59 +0200 Subject: [PATCH] mmc: fsl_esdhc_spl: pre-PBL: check for BOOT signature instead of MBR/DBR MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Pre-PBL BootROMs (MPC8536E, MPC8569E, P2020, P1011, P1012, P1013, P1020, P1021, P1022) require custom BOOT signature on sector 0 and MBR/DBR signature is not required at all. So add check for BOOT signature and remove check for MBR/DBR. This allows U-Boot SPL to load proper U-Boot on pre-PBL BootROMs platforms also from SD cards which do not have MBR/DBR signature on sector 0. Signed-off-by: Pali Rohár Reviewed-by: Priyanka Jain --- drivers/mmc/fsl_esdhc_spl.c | 27 +++++++++++++++++++++++++-- 1 file changed, 25 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/fsl_esdhc_spl.c b/drivers/mmc/fsl_esdhc_spl.c index bee7657..109f558 100644 --- a/drivers/mmc/fsl_esdhc_spl.c +++ b/drivers/mmc/fsl_esdhc_spl.c @@ -14,6 +14,8 @@ * on SDCard, so we must read the MBR to get the start address and code * length of the u-boot image, then calculate the address of the env. */ +#define ESDHC_BOOT_SIGNATURE_OFF 0x40 +#define ESDHC_BOOT_SIGNATURE 0x424f4f54 #define ESDHC_BOOT_IMAGE_SIZE 0x48 #define ESDHC_BOOT_IMAGE_ADDR 0x50 #define MBRDBR_BOOT_SIG_55 0x1fe @@ -61,6 +63,9 @@ void __noreturn mmc_boot(void) uchar *tmp_buf; u32 blklen; uchar val; +#ifndef CONFIG_SPL_FSL_PBL + u32 val32; +#endif uint i, byte_num; #endif u32 offset, code_len; @@ -94,16 +99,34 @@ void __noreturn mmc_boot(void) hang(); } +#ifdef CONFIG_SPL_FSL_PBL val = *(tmp_buf + MBRDBR_BOOT_SIG_55); if (0x55 != val) { - puts("spl: mmc signature is not valid!!\n"); + puts("spl: mmc MBR/DBR signature is not valid!!\n"); hang(); } val = *(tmp_buf + MBRDBR_BOOT_SIG_AA); if (0xAA != val) { - puts("spl: mmc signature is not valid!!\n"); + puts("spl: mmc MBR/DBR signature is not valid!!\n"); hang(); } +#else + /* + * Booting from On-Chip ROM (eSDHC or eSPI), Document Number: AN3659, Rev. 2, 06/2012. + * Pre-PBL BootROMs (MPC8536E, MPC8569E, P2020, P1011, P1012, P1013, P1020, P1021, P1022) + * require custom BOOT signature on sector 0 and MBR/DBR signature is not required at all. + */ + byte_num = 4; + val32 = 0; + for (i = 0; i < byte_num; i++) { + val = *(tmp_buf + ESDHC_BOOT_SIGNATURE_OFF + i); + val32 = (val32 << 8) + val; + } + if (val32 != ESDHC_BOOT_SIGNATURE) { + puts("spl: mmc BOOT signature is not valid!!\n"); + hang(); + } +#endif byte_num = 4; offset = 0; -- 2.7.4