[PATCH v6 17/25] spl: Convert mmc to spl_load

[Sean Anderson <seanga2@gmail.com>]

This converts the mmc loader to spl_load. Legacy images are handled by
spl_load (via spl_parse_image_header), so mmc_load_legacy can be
omitted. To accurately determine whether mmc_load_image_raw_sector is used
(which might not be the case if SYS_MMCSD_FS_BOOT is enabled), we introduce
a helper config SYS_MMCSD_RAW_MODE. This ensures we can inline spl_load
correctly when a board only boots from filesystems. We still need to check
for SPL_MMC, since some boards enable configure raw mode even without MMC
support.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
---

Changes in v6:
- Add SYS_MMCSD_RAW_MODE to help determine whether SPL_MMC loads
  anything directly.
- Explicitly initialize load_info members

Changes in v5:
- Rework to load header in spl_load

 common/spl/Kconfig       |  8 ++++
 common/spl/spl_mmc.c     | 89 ++++------------------------------------
 include/spl_load.h       |  1 +
 test/image/spl_load_fs.c |  3 --
 4 files changed, 16 insertions(+), 85 deletions(-)

diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 0bc57d5fedb..b93526904eb 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -481,6 +481,11 @@ config SPL_DISPLAY_PRINT
 	  banner ("U-Boot SPL ..."). This function should be provided by
 	  the board.
 
+config SPL_SYS_MMCSD_RAW_MODE
+	bool
+	help
+	  Support booting from an MMC without a filesystem.
+
 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
 	bool "MMC raw mode: by sector"
 	default y if ARCH_SUNXI || ARCH_DAVINCI || ARCH_UNIPHIER || \
@@ -490,6 +495,7 @@ config SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
 		     OMAP44XX || OMAP54XX || AM33XX || AM43XX || \
 		     TARGET_SIFIVE_UNLEASHED || TARGET_SIFIVE_UNMATCHED
 	select SPL_LOAD_BLOCK if SPL_MMC
+	select SPL_SYS_MMCSD_RAW_MODE if SPL_MMC
 	help
 	  Use sector number for specifying U-Boot location on MMC/SD in
 	  raw mode.
@@ -527,6 +533,7 @@ config SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET
 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
 	bool "MMC Raw mode: by partition"
 	select SPL_LOAD_BLOCK if SPL_MMC
+	select SPL_SYS_MMCSD_RAW_MODE if SPL_MMC
 	help
 	  Use a partition for loading U-Boot when using MMC/SD in raw mode.
 
@@ -1114,6 +1121,7 @@ config SPL_FALCON_BOOT_MMCSD
 	bool "Enable Falcon boot from MMC or SD media"
 	depends on SPL_OS_BOOT && SPL_MMC
 	select SPL_LOAD_BLOCK
+	select SPL_SYS_MMCSD_RAW_MODE
 	help
 	  Select this if the Falcon mode OS image mode is on MMC or SD media.
 
diff --git a/common/spl/spl_mmc.c b/common/spl/spl_mmc.c
index 91272c03d3f..3d032bb27ce 100644
--- a/common/spl/spl_mmc.c
+++ b/common/spl/spl_mmc.c
@@ -8,9 +8,9 @@
 #include <common.h>
 #include <dm.h>
 #include <log.h>
-#include <mapmem.h>
 #include <part.h>
 #include <spl.h>
+#include <spl_load.h>
 #include <linux/compiler.h>
 #include <errno.h>
 #include <asm/u-boot.h>
@@ -19,49 +19,6 @@
 #include <image.h>
 #include <imx_container.h>
 
-static int mmc_load_legacy(struct spl_image_info *spl_image,
-			   struct spl_boot_device *bootdev,
-			   struct mmc *mmc,
-			   ulong sector, struct legacy_img_hdr *header)
-{
-	u32 image_offset_sectors;
-	u32 image_size_sectors;
-	unsigned long count;
-	u32 image_offset;
-	int ret;
-
-	ret = spl_parse_image_header(spl_image, bootdev, header);
-	if (ret)
-		return ret;
-
-	/* convert offset to sectors - round down */
-	image_offset_sectors = spl_image->offset / mmc->read_bl_len;
-	/* calculate remaining offset */
-	image_offset = spl_image->offset % mmc->read_bl_len;
-
-	/* convert size to sectors - round up */
-	image_size_sectors = (spl_image->size + mmc->read_bl_len - 1) /
-			     mmc->read_bl_len;
-
-	/* Read the header too to avoid extra memcpy */
-	count = blk_dread(mmc_get_blk_desc(mmc),
-			  sector + image_offset_sectors,
-			  image_size_sectors,
-			  map_sysmem(spl_image->load_addr,
-				     image_size_sectors * mmc->read_bl_len));
-	debug("read %x sectors to %lx\n", image_size_sectors,
-	      spl_image->load_addr);
-	if (count != image_size_sectors)
-		return -EIO;
-
-	if (image_offset)
-		memmove((void *)(ulong)spl_image->load_addr,
-			(void *)(ulong)spl_image->load_addr + image_offset,
-			spl_image->size);
-
-	return 0;
-}
-
 static ulong h_spl_load_read(struct spl_load_info *load, ulong off,
 			     ulong size, void *buf)
 {
@@ -87,46 +44,14 @@ int mmc_load_image_raw_sector(struct spl_image_info *spl_image,
 			      struct spl_boot_device *bootdev,
 			      struct mmc *mmc, unsigned long sector)
 {
-	unsigned long count;
-	struct legacy_img_hdr *header;
+	int ret;
 	struct blk_desc *bd = mmc_get_blk_desc(mmc);
-	int ret = 0;
+	struct spl_load_info load;
 
-	header = spl_get_load_buffer(-sizeof(*header), bd->blksz);
-
-	/* read image header to find the image size & load address */
-	count = blk_dread(bd, sector, 1, header);
-	debug("hdr read sector %lx, count=%lu\n", sector, count);
-	if (count == 0) {
-		ret = -EIO;
-		goto end;
-	}
-
-	if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
-	    image_get_magic(header) == FDT_MAGIC) {
-		struct spl_load_info load;
-
-		debug("Found FIT\n");
-		load.priv = bd;
-		spl_set_bl_len(&load, bd->blksz);
-		load.read = h_spl_load_read;
-		ret = spl_load_simple_fit(spl_image, &load,
-					  sector << bd->log2blksz, header);
-	} else if (IS_ENABLED(CONFIG_SPL_LOAD_IMX_CONTAINER) &&
-		   valid_container_hdr((void *)header)) {
-		struct spl_load_info load;
-
-		load.priv = bd;
-		spl_set_bl_len(&load, bd->blksz);
-		load.read = h_spl_load_read;
-
-		ret = spl_load_imx_container(spl_image, &load,
-					     sector << bd->log2blksz);
-	} else {
-		ret = mmc_load_legacy(spl_image, bootdev, mmc, sector, header);
-	}
-
-end:
+	load.priv = bd;
+	spl_set_bl_len(&load, bd->blksz);
+	load.read = h_spl_load_read;
+	ret = spl_load(spl_image, bootdev, &load, 0, sector << bd->log2blksz);
 	if (ret) {
 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 		puts("mmc_load_image_raw_sector: mmc block read error\n");
diff --git a/include/spl_load.h b/include/spl_load.h
index 5e0460d956d..d55a47ae7d7 100644
--- a/include/spl_load.h
+++ b/include/spl_load.h
@@ -97,6 +97,7 @@ static inline int _spl_load(struct spl_image_info *spl_image,
 #define SPL_LOAD_USERS \
 	IS_ENABLED(CONFIG_SPL_FS_EXT4) + \
 	IS_ENABLED(CONFIG_SPL_FS_FAT) + \
+	IS_ENABLED(CONFIG_SPL_SYS_MMCSD_RAW_MODE) + \
 	0
 
 #if SPL_LOAD_USERS > 1
diff --git a/test/image/spl_load_fs.c b/test/image/spl_load_fs.c
index 333df2dfb53..67c19da95e7 100644
--- a/test/image/spl_load_fs.c
+++ b/test/image/spl_load_fs.c
@@ -428,9 +428,6 @@ static int spl_test_mmc(struct unit_test_state *uts, const char *test_name,
 	if (spl_test_mmc_fs(uts, test_name, type, create_fat, false))
 		return CMD_RET_FAILURE;
 
-	if (type == LEGACY_LZMA)
-		return 0;
-
 	return do_spl_test_load(uts, test_name, type,
 				SPL_LOAD_IMAGE_GET(0, BOOT_DEVICE_MMC1,
 						   spl_mmc_load_image),
-- 
2.37.1