spl: MMC U-Boot image load from raw partition

Raw images of U-Boot can be stored inside MMC partitions, so it makes sense to
read the partition table, looking for a partition number instead of using
a fixed sector address.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Reviewed-by: Tom Rini <trini@ti.com>
[trini: Only add mmc_load_image_raw_partition() when
CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION to avoid warning, add missing
conversion in spl_mmc_load_image()]
Signed-off-by: Tom Rini <trini@ti.com>

README

@@ -3660,6 +3660,10 @@ FIT uImage format:
 		Address and partition on the MMC to load U-Boot from
 		when the MMC is being used in raw mode.
 
+		CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
+		Partition on the MMC to load U-Boot from when the MMC is being
+		used in raw mode
+
 		CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR
 		Sector to load kernel uImage from when MMC is being
 		used in raw mode (for Falcon mode)

common/spl/spl_mmc.c

@@ -15,7 +15,7 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-static int mmc_load_image_raw(struct mmc *mmc, unsigned long sector)
+static int mmc_load_image_raw_sector(struct mmc *mmc, unsigned long sector)
 {
 	unsigned long err;
 	u32 image_size_sectors;
@@ -51,6 +51,22 @@ end:
 	return (err == 0);
 }
 
+#ifdef CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
+static int mmc_load_image_raw_partition(struct mmc *mmc, int partition)
+{
+	disk_partition_t info;
+
+	if (get_partition_info(&mmc->block_dev, partition, &info)) {
+#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
+		printf("spl: partition error\n");
+#endif
+		return -1;
+	}
+
+	return mmc_load_image_raw_sector(mmc, info.start);
+}
+#endif
+
 #ifdef CONFIG_SPL_OS_BOOT
 static int mmc_load_image_raw_os(struct mmc *mmc)
 {
@@ -64,7 +80,8 @@ static int mmc_load_image_raw_os(struct mmc *mmc)
 		return -1;
 	}
 
-	return mmc_load_image_raw(mmc, CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR);
+	return mmc_load_image_raw_sector(mmc,
+						CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR);
 }
 #endif
 
@@ -98,8 +115,13 @@ void spl_mmc_load_image(void)
 #ifdef CONFIG_SPL_OS_BOOT
 		if (spl_start_uboot() || mmc_load_image_raw_os(mmc))
 #endif
-		err = mmc_load_image_raw(mmc,
+#ifdef CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
+		err = mmc_load_image_raw_partition(mmc,
+			CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION);
+#else
+		err = mmc_load_image_raw_sector(mmc,
 			CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR);
+#endif
 #if defined(CONFIG_SPL_FAT_SUPPORT) || defined(CONFIG_SPL_EXT_SUPPORT)
 	} else if (boot_mode == MMCSD_MODE_FS) {
 		debug("boot mode - FS\n");
@@ -146,7 +168,7 @@ void spl_mmc_load_image(void)
 #ifdef CONFIG_SPL_OS_BOOT
 		if (spl_start_uboot() || mmc_load_image_raw_os(mmc))
 #endif
-		err = mmc_load_image_raw(mmc,
+		err = mmc_load_image_raw_sector(mmc,
 			CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR);
 #endif
 	} else {