mmc: Separate "mmc swrite" from fastboot

Introduce CONFIG_IMAGE_SPARSE and CONFIG_CMD_MMC_SWRITE so the "mmc
swrite" command is separated from the fastboot code.

Move image-sparse from common to lib so it's clear it's library code.

Rename CONFIG_FASTBOOT_FLASH_FILLBUF_SIZE to CONFIG_IMAGE_SPARSE_FILLBUF_SIZE
and migrate it to Kconfig.

Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
Acked-by: Jassi Brar <jaswinder.singh@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>

cmd/Kconfig

@@ -833,6 +833,14 @@ config CMD_MMC_RPMB
 	  Enable the commands for reading, writing and programming the
 	  key for the Replay Protection Memory Block partition in eMMC.
 
+config CMD_MMC_SWRITE
+	bool "mmc swrite"
+	depends on CMD_MMC && MMC_WRITE
+	select IMAGE_SPARSE
+	help
+	  Enable support for the "mmc swrite" command to write Android sparse
+	  images to eMMC.
+
 config CMD_NAND
 	bool "nand"
 	default y if NAND_SUNXI

cmd/mmc.c

@@ -308,8 +308,7 @@ static int do_mmc_read(cmd_tbl_t *cmdtp, int flag,
 	return (n == cnt) ? CMD_RET_SUCCESS : CMD_RET_FAILURE;
 }
 
-#if CONFIG_IS_ENABLED(MMC_WRITE)
-#if defined(CONFIG_FASTBOOT_FLASH)
+#if CONFIG_IS_ENABLED(CMD_MMC_SWRITE)
 static lbaint_t mmc_sparse_write(struct sparse_storage *info, lbaint_t blk,
 				 lbaint_t blkcnt, const void *buffer)
 {
@@ -374,6 +373,7 @@ static int do_mmc_sparse_write(cmd_tbl_t *cmdtp, int flag,
 }
 #endif
 
+#if CONFIG_IS_ENABLED(MMC_WRITE)
 static int do_mmc_write(cmd_tbl_t *cmdtp, int flag,
 			int argc, char * const argv[])
 {
@@ -868,11 +868,11 @@ static cmd_tbl_t cmd_mmc[] = {
 	U_BOOT_CMD_MKENT(read, 4, 1, do_mmc_read, "", ""),
 #if CONFIG_IS_ENABLED(MMC_WRITE)
 	U_BOOT_CMD_MKENT(write, 4, 0, do_mmc_write, "", ""),
-#if defined(CONFIG_FASTBOOT_FLASH)
-	U_BOOT_CMD_MKENT(swrite, 3, 0, do_mmc_sparse_write, "", ""),
-#endif
 	U_BOOT_CMD_MKENT(erase, 3, 0, do_mmc_erase, "", ""),
 #endif
+#if CONFIG_IS_ENABLED(CMD_MMC_SWRITE)
+	U_BOOT_CMD_MKENT(swrite, 3, 0, do_mmc_sparse_write, "", ""),
+#endif
 	U_BOOT_CMD_MKENT(rescan, 1, 1, do_mmc_rescan, "", ""),
 	U_BOOT_CMD_MKENT(part, 1, 1, do_mmc_part, "", ""),
 	U_BOOT_CMD_MKENT(dev, 3, 0, do_mmc_dev, "", ""),
@@ -927,7 +927,7 @@ U_BOOT_CMD(
 	"info - display info of the current MMC device\n"
 	"mmc read addr blk# cnt\n"
 	"mmc write addr blk# cnt\n"
-#if defined(CONFIG_FASTBOOT_FLASH)
+#if CONFIG_IS_ENABLED(CMD_MMC_SWRITE)
 	"mmc swrite addr blk#\n"
 #endif
 	"mmc erase blk# cnt\n"

common/Makefile

@@ -29,7 +29,6 @@ obj-$(CONFIG_CMD_BOOTI) += bootm.o bootm_os.o
 
 obj-$(CONFIG_CMD_BEDBUG) += bedbug.o
 obj-$(CONFIG_$(SPL_TPL_)OF_LIBFDT) += fdt_support.o
-obj-$(CONFIG_FASTBOOT_FLASH) += image-sparse.o
 obj-$(CONFIG_MII) += miiphyutil.o
 obj-$(CONFIG_CMD_MII) += miiphyutil.o
 obj-$(CONFIG_PHYLIB) += miiphyutil.o

drivers/fastboot/Kconfig

@@ -57,6 +57,7 @@ config FASTBOOT_FLASH
 	bool "Enable FASTBOOT FLASH command"
 	default y if ARCH_SUNXI
 	depends on MMC || (NAND && CMD_MTDPARTS)
+	select IMAGE_SPARSE
 	help
 	  The fastboot protocol includes a "flash" command for writing
 	  the downloaded image to a non-volatile storage device. Define

lib/Kconfig

@@ -61,6 +61,17 @@ config SPL_STRTO
 config TPL_STRTO
 	bool
 
+config IMAGE_SPARSE
+	bool
+
+config IMAGE_SPARSE_FILLBUF_SIZE
+	hex "Android sparse image CHUNK_TYPE_FILL buffer size"
+	default 0x80000
+	depends on IMAGE_SPARSE
+	help
+	  Set the size of the fill buffer used when processing CHUNK_TYPE_FILL
+	  chunks.
+
 config USE_PRIVATE_LIBGCC
 	bool "Use private libgcc"
 	depends on HAVE_PRIVATE_LIBGCC

lib/Makefile

@@ -29,6 +29,7 @@ obj-$(CONFIG_FIT) += fdtdec_common.o
 obj-$(CONFIG_TEST_FDTDEC) += fdtdec_test.o
 obj-$(CONFIG_GZIP_COMPRESSED) += gzip.o
 obj-$(CONFIG_GENERATE_SMBIOS_TABLE) += smbios.o
+obj-$(CONFIG_IMAGE_SPARSE) += image-sparse.o
 obj-y += initcall.o
 obj-$(CONFIG_LMB) += lmb.o
 obj-y += ldiv.o

lib/image-sparse.c

@@ -44,10 +44,6 @@
 
 #include <linux/math64.h>
 
-#ifndef CONFIG_FASTBOOT_FLASH_FILLBUF_SIZE
-#define CONFIG_FASTBOOT_FLASH_FILLBUF_SIZE (1024 * 512)
-#endif
-
 static void default_log(const char *ignored, char *response) {}
 
 int write_sparse_image(struct sparse_storage *info,
@@ -69,7 +65,7 @@ int write_sparse_image(struct sparse_storage *info,
 	int i;
 	int j;
 
-	fill_buf_num_blks = CONFIG_FASTBOOT_FLASH_FILLBUF_SIZE / info->blksz;
+	fill_buf_num_blks = CONFIG_IMAGE_SPARSE_FILLBUF_SIZE / info->blksz;
 
 	/* Read and skip over sparse image header */
 	sparse_header = (sparse_header_t *)data;

scripts/config_whitelist.txt

@@ -589,7 +589,6 @@ CONFIG_EXYNOS_RELOCATE_CODE_BASE
 CONFIG_EXYNOS_SPL
 CONFIG_EXYNOS_TMU
 CONFIG_FACTORYSET
-CONFIG_FASTBOOT_FLASH_FILLBUF_SIZE
 CONFIG_FAST_FLASH_BIT
 CONFIG_FB_ADDR
 CONFIG_FB_BACKLIGHT