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COMMON: MMC: Command to support EMMC booting and to resize EMMC boot partition

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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>
This commit is contained in:
Amar 2013-04-27 11:43:00 +05:30 committed by Minkyu Kang
parent c748be0d30
commit 2a91c91346
1 changed files with 107 additions and 2 deletions
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109
common/cmd_mmc.c
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@ -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 */