[U-Boot] [PATCH v2 6/8] cmd_mmc.c: Add 'partconf' command to mmc

[Jaehoon Chung <jh80.chung@samsung.com>]

On 01/31/2014 06:31 AM, Tom Rini wrote:
> Add a partconf sub-command to the mmc command to allow for setting
> the boot_ack, boot_partition and partition_access fields of
> PARTITION_CONFIG (formerly BOOT_CONFIG, EXT_CSD[179]).  Part of this
> requires changing the check for 'part' from an strncmp to a strcmp, like
> the rest of the sub-commands.
> 
> Cc: Andy Fleming <afleming@gmail.com>
> Cc: Pantelis Antoniou <panto@antoniou-consulting.com>
> Signed-off-by: Tom Rini <trini@ti.com>
> ---
>  common/cmd_mmc.c  |   30 +++++++++++++++++++++++++++++-
>  drivers/mmc/mmc.c |   21 +++++++++++++++++++++
>  include/mmc.h     |    2 ++
>  3 files changed, 52 insertions(+), 1 deletion(-)
> 
> diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c
> index a322063..5842e85 100644
> --- a/common/cmd_mmc.c
> +++ b/common/cmd_mmc.c
> @@ -195,7 +195,7 @@ static int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
>  			return 1;
>  		else
>  			return 0;
> -	} else if (strncmp(argv[1], "part", 4) == 0) {
> +	} else if (strcmp(argv[1], "part") == 0) {
>  		block_dev_desc_t *mmc_dev;
>  		struct mmc *mmc;
>  
> @@ -311,7 +311,33 @@ static int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
>  
>  		/* acknowledge to be sent during boot operation */
>  		return boot_part_access(mmc, 1, part_num, access);
> +	} else if (strcmp(argv[1], "partconf") == 0) {
> +		int dev;
> +		struct mmc *mmc;
> +		u8 ack, part_num, access;
> +
> +		if (argc == 6) {
> +			dev = simple_strtoul(argv[2], NULL, 10);
> +			ack = simple_strtoul(argv[3], NULL, 10);
> +			part_num = simple_strtoul(argv[4], NULL, 10);
> +			access = 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("PARTITION_CONFIG only exists on eMMC\n");
> +			return 1;
> +		}
> +
> +		/* acknowledge to be sent during boot operation */
> +		return mmc_set_part_conf(mmc, ack, part_num, access);
>  	} else if (strcmp(argv[1], "bootpart-resize") == 0) {
>  		int dev;
>  		struct mmc *mmc;
> @@ -451,6 +477,8 @@ U_BOOT_CMD(
>  	" - Enable boot_part for booting and disable access to boot_part\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"

How about using bracket("< >") for more readable?
mmc partconf <dev> <boot_ack> <boot_partition> <partition_access>

Anyway, looks good to me.
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>

> +	" - Change the bits of the PARTITION_CONFIG field of the specified device\n"
>  #endif
>  	"mmc setdsr - set DSR register value\n"
>  	);
> diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
> index c6a1c23..1591fce 100644
> --- a/drivers/mmc/mmc.c
> +++ b/drivers/mmc/mmc.c
> @@ -1505,4 +1505,25 @@ int mmc_boot_part_access(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
>  	}
>  	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
> + * PARTITION_ACCESS.
> + *
> + * Returns 0 on success.
> + */
> +int mmc_set_part_conf(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
> +{
> +	int err;
> +
> +	err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF,
> +			 EXT_CSD_BOOT_ACK(ack) |
> +			 EXT_CSD_BOOT_PART_NUM(part_num) |
> +			 EXT_CSD_PARTITION_ACCESS(access));
> +
> +	if (err)
> +		return err;
> +	return 0;
> +}
>  #endif
> diff --git a/include/mmc.h b/include/mmc.h
> index e1060b9..7e026da 100644
> --- a/include/mmc.h
> +++ b/include/mmc.h
> @@ -312,6 +312,8 @@ int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize,
>  					unsigned long rpmbsize);
>  /* Function to send commands to open/close the specified boot partition */
>  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);
>  
>  /**
>   * Start device initialization and return immediately; it does not block on
>