This patch adds commands to access(open/close) and resize boot partitions on
EMMC.
Signed-off-by: Amar <amarendra...@samsung.com>
---
Changes since V1:
1)Combined the common piece of code between 'open' and 'close'
operations.
Changes since V2:
1)Updation of commit message and resubmition of proper patch set.
Changes since V3:
No change.
Changes since V4:
1)Added a new funtion boot_part_access() to combine the common parts of
'mmc open' and 'mmc close' functionalities.
2)Used the generic function "mmc_boot_part_access()" instead of
two functions "mmc_boot_open()" and "mmc_boot_close()". By doing so user
can specify which boot partition to be accessed (opened / closed).
common/cmd_mmc.c | 98 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 97 insertions(+), 1 deletion(-)
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c
index 7dacd51..d036d34 100644
--- a/common/cmd_mmc.c
+++ b/common/cmd_mmc.c
@@ -147,6 +147,31 @@ U_BOOT_CMD(
"- display info of the current MMC device"
);
+static int boot_part_access(struct mmc *mmc, u32 ack, u32 part_num, u32 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 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 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;
+ }
+}
+
static int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
enum mmc_state state;
@@ -248,6 +273,71 @@ 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;
+ u32 ack, 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*/
+ if (strcmp(argv[1], "close") == 0)
+ access = 0; /* No access to boot partition */
+
+ /* acknowledge to be sent during boot operation */
+ ack = 1;
+ return boot_part_access(mmc, ack, 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;
+ }
}
state = MMC_INVALID;
@@ -317,5 +407,11 @@ 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 <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
--
1.8.0
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