[U-Boot] [PATCH V4 9/9] COMMON: MMC: Command to support EMMC booting and to

Amar
2013-01-04T09:34:10Z

This patch adds commands to open, close and resize boot partitions on EMMC.

Changes from V1:
1)Combined the common piece of code between 'open' and 'close'
operations.

Changes from V2:
1)Updation of commit message and resubmition of proper patch set.

Changes from V3:
No change.

Signed-off-by: Amar <amarendra.xt@samsung.com>
---
common/cmd_mmc.c | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 83 insertions(+), 1 deletion(-)

diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c
index 7dacd51..1dabb5b 100644
--- a/common/cmd_mmc.c
+++ b/common/cmd_mmc.c
@@ -248,6 +248,84 @@ static int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
curr_device, mmc->part_num);

return 0;
+ } else if ((strcmp(argv[1], "open") == 0) ||
+ (strcmp(argv[1], "close") == 0)) {
+ int dev;
+ struct mmc *mmc;
+
+ if (argc == 2)
+ dev = curr_device;
+ else if (argc == 3)
+ dev = simple_strtoul(argv[2], 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 (strcmp(argv[1], "open") == 0) {
+ if (!(mmc_boot_open(mmc))) {
+ printf("EMMC OPEN Success.\n");
+ printf("\t\t\t!!!Notice!!!\n");
+ printf("!You must close EMMC"
+ " boot Partition after all"
+ " images are written\n");
+ printf("!EMMC boot partition"
+ " has continuity at"
+ " image writing time.\n");
+ printf("!So, Do not close boot"
+ " partition, Before, all"
+ " images are written.\n");
+ return 0;
+ } else {
+ printf("EMMC OPEN Failed.\n");
+ return 1;
+ }
+ }
+
+ if (strcmp(argv[1], "close") == 0) {
+ if (!(mmc_boot_close(mmc))) {
+ printf("EMMC CLOSE Success.\n");
+ return 0;
+ } else {
+ printf("EMMC CLOSE Failed.\n");
+ return 1;
+ }
+ }
+ } 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;
+ }
}

state = MMC_INVALID;
@@ -317,5 +395,9 @@ 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"
+ "mmc open <device num> - opens the specified device\n"
+ "mmc close <device num> - closes the specified device\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
--
1.8.0