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cmd_mmc.c: Add bootbus mmc sub-command

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Add a bootbus sub-command to the mmc command to allow for setting
the boot_bus_width, reset_boot_bus_width and boot_mode fields of
BOOT_BUS_WIDTH (EXT_CSD[177]).

Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Tom Rini <trini@ti.com>
Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
This commit is contained in:
Tom Rini 2014-02-05 10:24:22 -05:00 committed by Pantelis Antoniou
parent 792970b0a3
commit 5a99b9de1a
3 changed files with 55 additions and 0 deletions
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29
common/cmd_mmc.c
View file

@ -338,6 +338,33 @@ static int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
/* acknowledge to be sent during boot operation */
return mmc_set_part_conf(mmc, ack, part_num, access);
} else if (strcmp(argv[1], "bootbus") == 0) {
int dev;
struct mmc *mmc;
u8 width, reset, mode;
if (argc == 6) {
dev = simple_strtoul(argv[2], NULL, 10);
width = simple_strtoul(argv[3], NULL, 10);
reset = simple_strtoul(argv[4], NULL, 10);
mode = simple_strtoul(argv[5], 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)) {
puts("BOOT_BUS_WIDTH only exists on eMMC\n");
return 1;
}
/* acknowledge to be sent during boot operation */
return mmc_set_boot_bus_width(mmc, width, reset, mode);
} else if (strcmp(argv[1], "bootpart-resize") == 0) {
int dev;
struct mmc *mmc;
@ -475,6 +502,8 @@ U_BOOT_CMD(
" - 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 bootbus dev boot_bus_width reset_boot_bus_width boot_mode\n"
" - Set the BOOT_BUS_WIDTH field of the specified device\n"
"mmc bootpart-resize <dev> <boot part size MB> <RPMB part size MB>\n"
" - Change sizes of boot and RPMB partitions of specified device\n"
"mmc partconf dev boot_ack boot_partition partition_access\n"

21
drivers/mmc/mmc.c
View file

@ -1506,6 +1506,27 @@ int mmc_boot_part_access(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
return 0;
}
/*
* Modify EXT_CSD[177] which is BOOT_BUS_WIDTH
* based on the passed in values for BOOT_BUS_WIDTH, RESET_BOOT_BUS_WIDTH
* and BOOT_MODE.
*
* Returns 0 on success.
*/
int mmc_set_boot_bus_width(struct mmc *mmc, u8 width, u8 reset, u8 mode)
{
int err;
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_BUS_WIDTH,
EXT_CSD_BOOT_BUS_WIDTH_MODE(mode) |
EXT_CSD_BOOT_BUS_WIDTH_RESET(reset) |
EXT_CSD_BOOT_BUS_WIDTH_WIDTH(width));
if (err)
return err;
return 0;
}
/*
* Modify EXT_CSD[179] which is PARTITION_CONFIG (formerly BOOT_CONFIG)
* based on the passed in values for BOOT_ACK, BOOT_PARTITION_ENABLE and

5
include/mmc.h
View file

@ -187,6 +187,9 @@
#define EXT_CSD_BOOT_PART_NUM(x) (x << 3)
#define EXT_CSD_PARTITION_ACCESS(x) (x << 0)
#define EXT_CSD_BOOT_BUS_WIDTH_MODE(x) (x << 3)
#define EXT_CSD_BOOT_BUS_WIDTH_RESET(x) (x << 2)
#define EXT_CSD_BOOT_BUS_WIDTH_WIDTH(x) (x)
#define R1_ILLEGAL_COMMAND (1 << 22)
#define R1_APP_CMD (1 << 5)
@ -314,6 +317,8 @@ int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize,
int mmc_boot_part_access(struct mmc *mmc, u8 ack, u8 part_num, u8 access);
/* Function to modify the PARTITION_CONFIG field of EXT_CSD */
int mmc_set_part_conf(struct mmc *mmc, u8 ack, u8 part_num, u8 access);
/* Function to modify the BOOT_BUS_WIDTH field of EXT_CSD */
int mmc_set_boot_bus_width(struct mmc *mmc, u8 width, u8 reset, u8 mode);
/**
* Start device initialization and return immediately; it does not block on