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authorAmar <amarendra.xt@samsung.com>2013-04-27 11:43:00 +0530
committerMinkyu Kang <mk7.kang@samsung.com>2013-06-13 17:35:14 +0900
commit2a91c9134675140853577b565210458b5774e6cf (patch)
treefe3f9bb96674c60fe16cba227bbe82cff0897ea3 /common
parentc748be0d30f3df538a897f8aad6db447c1d9580f (diff)
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COMMON: MMC: Command to support EMMC booting and to resize EMMC boot partition
This patch adds commands to access(open/close) and resize boot partitions on EMMC. Signed-off-by: Amar <amarendra.xt@samsung.com> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Diffstat (limited to 'common')
-rw-r--r--common/cmd_mmc.c109
1 files changed, 107 insertions, 2 deletions
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c
index 7d82469..5f1ed43 100644
--- a/common/cmd_mmc.c
+++ b/common/cmd_mmc.c
@@ -147,6 +147,36 @@ U_BOOT_CMD(
"- display info of the current MMC device"
);
+#ifdef CONFIG_SUPPORT_EMMC_BOOT
+static int boot_part_access(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
+{
+ int err;
+ err = mmc_boot_part_access(mmc, ack, part_num, access);
+
+ if ((err == 0) && (access != 0)) {
+ printf("\t\t\t!!!Notice!!!\n");
+
+ printf("!You must close EMMC boot Partition");
+ printf("after all images are written\n");
+
+ printf("!EMMC boot partition has continuity");
+ printf("at image writing time.\n");
+
+ printf("!So, do not close the boot partition");
+ printf("before all images are written.\n");
+ return 0;
+ } else if ((err == 0) && (access == 0))
+ return 0;
+ else if ((err != 0) && (access != 0)) {
+ printf("EMMC boot partition-%d OPEN Failed.\n", part_num);
+ return 1;
+ } else {
+ printf("EMMC boot partition-%d CLOSE Failed.\n", part_num);
+ return 1;
+ }
+}
+#endif
+
static int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
enum mmc_state state;
@@ -258,8 +288,74 @@ static int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
curr_device, mmc->part_num);
return 0;
- }
+#ifdef CONFIG_SUPPORT_EMMC_BOOT
+ } else if ((strcmp(argv[1], "open") == 0) ||
+ (strcmp(argv[1], "close") == 0)) {
+ int dev;
+ struct mmc *mmc;
+ u8 part_num, access = 0;
+
+ if (argc == 4) {
+ dev = simple_strtoul(argv[2], NULL, 10);
+ part_num = simple_strtoul(argv[3], NULL, 10);
+ } else {
+ return CMD_RET_USAGE;
+ }
+
+ mmc = find_mmc_device(dev);
+ if (!mmc) {
+ printf("no mmc device at slot %x\n", dev);
+ return 1;
+ }
+ if (IS_SD(mmc)) {
+ printf("SD device cannot be opened/closed\n");
+ return 1;
+ }
+
+ if ((part_num <= 0) || (part_num > MMC_NUM_BOOT_PARTITION)) {
+ printf("Invalid boot partition number:\n");
+ printf("Boot partition number cannot be <= 0\n");
+ printf("EMMC44 supports only 2 boot partitions\n");
+ return 1;
+ }
+
+ if (strcmp(argv[1], "open") == 0)
+ access = part_num; /* enable R/W access to boot part*/
+ else
+ access = 0; /* No access to boot partition */
+
+ /* acknowledge to be sent during boot operation */
+ return boot_part_access(mmc, 1, part_num, access);
+
+ } else if (strcmp(argv[1], "bootpart") == 0) {
+ int dev;
+ dev = simple_strtoul(argv[2], NULL, 10);
+
+ u32 bootsize = simple_strtoul(argv[3], NULL, 10);
+ u32 rpmbsize = simple_strtoul(argv[4], NULL, 10);
+ struct mmc *mmc = find_mmc_device(dev);
+ if (!mmc) {
+ printf("no mmc device at slot %x\n", dev);
+ return 1;
+ }
+
+ if (IS_SD(mmc)) {
+ printf("It is not a EMMC device\n");
+ return 1;
+ }
+
+ if (0 == mmc_boot_partition_size_change(mmc,
+ bootsize, rpmbsize)) {
+ printf("EMMC boot partition Size %d MB\n", bootsize);
+ printf("EMMC RPMB partition Size %d MB\n", rpmbsize);
+ return 0;
+ } else {
+ printf("EMMC boot partition Size change Failed.\n");
+ return 1;
+ }
+#endif /* CONFIG_SUPPORT_EMMC_BOOT */
+ }
state = MMC_INVALID;
if (argc == 5 && strcmp(argv[1], "read") == 0)
state = MMC_READ;
@@ -334,5 +430,14 @@ U_BOOT_CMD(
"mmc rescan\n"
"mmc part - lists available partition on current mmc device\n"
"mmc dev [dev] [part] - show or set current mmc device [partition]\n"
- "mmc list - lists available devices");
+ "mmc list - lists available devices\n"
+#ifdef CONFIG_SUPPORT_EMMC_BOOT
+ "mmc open <dev> <boot_partition>\n"
+ " - Enable boot_part for booting and enable R/W access of boot_part\n"
+ "mmc close <dev> <boot_partition>\n"
+ " - Enable boot_part for booting and disable access to boot_part\n"
+ "mmc bootpart <device num> <boot part size MB> <RPMB part size MB>\n"
+ " - change sizes of boot and RPMB partions of specified device\n"
#endif
+ );
+#endif /* !CONFIG_GENERIC_MMC */