[U-Boot] [PATCH V4 7/9] MMC: APIs to support resize of EMMC boot partition

[Jaehoon Chung]

Hi Amar,

I wonder that include the moviNAND specific code in mmc.c?
mmc_boot_partiton_size_change() looks like every vendor can use this function.

Best Regards,
Jaehoon Chung

On 01/04/2013 06:34 PM, Amar wrote:
> This patch adds APIs to open, close and to resize boot partiton for EMMC.
> 
> Changes from V1:
> 	New patch.
> 
> 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 at samsung.com>
> ---
>  drivers/mmc/mmc.c | 118 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  include/mmc.h     |  16 ++++++++
>  2 files changed, 134 insertions(+)
> 
> diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
> index 72e8ce6..8175b49 100644
> --- a/drivers/mmc/mmc.c
> +++ b/drivers/mmc/mmc.c
> @@ -1327,3 +1327,121 @@ int mmc_initialize(bd_t *bis)
>  
>  	return 0;
>  }
> +
> +int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize,
> +				unsigned long rpmbsize)
> +{
> +	int err;
> +	struct mmc_cmd cmd;
> +
> +	/* Only use this command for raw EMMC moviNAND */
> +	/* Enter backdoor mode */
> +	cmd.cmdidx = MMC_CMD_RES_MAN;
> +	cmd.resp_type = MMC_RSP_R1b;
> +	cmd.cmdarg = MMC_CMD62_ARG1;
> +
> +	err = mmc_send_cmd(mmc, &cmd, NULL);
> +	if (err) {
> +		debug("mmc_boot_partition_size_change: Error1 = %d\n", err);
> +		return err;
> +	}
> +
> +	/* Boot partition changing mode */
> +	cmd.cmdidx = MMC_CMD_RES_MAN;
> +	cmd.resp_type = MMC_RSP_R1b;
> +	cmd.cmdarg = MMC_CMD62_ARG2;
> +
> +	err = mmc_send_cmd(mmc, &cmd, NULL);
> +	if (err) {
> +		debug("mmc_boot_partition_size_change: Error2 = %d\n", err);
> +		return err;
> +	}
> +	/* boot partition size is multiple of 128KB */
> +	bootsize = ((bootsize*1024)/128);
> +
> +	/* Arg: boot partition size */
> +	cmd.cmdidx = MMC_CMD_RES_MAN;
> +	cmd.resp_type = MMC_RSP_R1b;
> +	cmd.cmdarg = bootsize;
> +
> +	err = mmc_send_cmd(mmc, &cmd, NULL);
> +	if (err) {
> +		debug("mmc_boot_partition_size_change: Error3 = %d\n", err);
> +		return err;
> +	}
> +	/* RPMB partition size is multiple of 128KB */
> +	rpmbsize = ((rpmbsize*1024)/128);
> +	/* Arg: RPMB partition size */
> +	cmd.cmdidx = MMC_CMD_RES_MAN;
> +	cmd.resp_type = MMC_RSP_R1b;
> +	cmd.cmdarg = rpmbsize;
> +
> +	err = mmc_send_cmd(mmc, &cmd, NULL);
> +	if (err) {
> +		debug("mmc_boot_partition_size_change: Error4 = %d\n", err);
> +		return err;
> +	}
> +	return 0;
> +}
> +
> +int mmc_boot_open(struct mmc *mmc)
> +{
> +	int err;
> +	struct mmc_cmd cmd;
> +
> +	/* Boot ack enable, boot partition enable , boot partition access */
> +	cmd.cmdidx = MMC_CMD_SWITCH;
> +	cmd.resp_type = MMC_RSP_R1b;
> +
> +	cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24 |
> +			EXT_CSD_PART_CONF << 16 |
> +			(EXT_CSD_BOOT_ACK_ENABLE |
> +			EXT_CSD_BOOT_PARTITION_ENABLE |
> +			EXT_CSD_PARTITION_ACCESS_ENABLE) << 8);
> +
> +	err = mmc_send_cmd(mmc, &cmd, NULL);
> +	if (err) {
> +		debug("mmc_boot_open: Error1 = %d\n", err);
> +		return err;
> +	}
> +
> +	/* 4bit transfer mode at booting time. */
> +	cmd.cmdidx = MMC_CMD_SWITCH;
> +	cmd.resp_type = MMC_RSP_R1b;
> +
> +	cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24|
> +			EXT_CSD_BOOT_BUS_WIDTH << 16|
> +			((1<<0) << 8));
> +
> +	err = mmc_send_cmd(mmc, &cmd, NULL);
> +	if (err) {
> +		debug("mmc_boot_open: Error2 = %d\n", err);
> +		return err;
> +	}
> +
> +	return 0;
> +}
> +
> +int mmc_boot_close(struct mmc *mmc)
> +{
> +	int err;
> +	struct mmc_cmd cmd;
> +
> +	/* Boot ack enable, boot partition enable , boot partition access */
> +	cmd.cmdidx = MMC_CMD_SWITCH;
> +	cmd.resp_type = MMC_RSP_R1b;
> +
> +	cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24|
> +			EXT_CSD_PART_CONF << 16|
> +			(EXT_CSD_BOOT_ACK_ENABLE |
> +			EXT_CSD_BOOT_PARTITION_ENABLE |
> +			EXT_CSD_PARTITION_ACCESS_DISABLE) << 8);
> +
> +	err = mmc_send_cmd(mmc, &cmd, NULL);
> +	if (err) {
> +		debug("mmc_boot_close: Error = %d\n", err);
> +		return err;
> +	}
> +
> +	return 0;
> +}
> diff --git a/include/mmc.h b/include/mmc.h
> index a13e2bd..999f0a3 100644
> --- a/include/mmc.h
> +++ b/include/mmc.h
> @@ -86,6 +86,11 @@
>  #define MMC_CMD_APP_CMD			55
>  #define MMC_CMD_SPI_READ_OCR		58
>  #define MMC_CMD_SPI_CRC_ON_OFF		59
> +#define MMC_CMD_RES_MAN			62
> +
> +#define MMC_CMD62_ARG1			0xefac62ec
> +#define MMC_CMD62_ARG2			0xcbaea7
> +
>  
>  #define SD_CMD_SEND_RELATIVE_ADDR	3
>  #define SD_CMD_SWITCH_FUNC		6
> @@ -153,6 +158,7 @@
>   */
>  #define EXT_CSD_PARTITIONING_SUPPORT	160	/* RO */
>  #define EXT_CSD_ERASE_GROUP_DEF		175	/* R/W */
> +#define EXT_CSD_BOOT_BUS_WIDTH		177
>  #define EXT_CSD_PART_CONF		179	/* R/W */
>  #define EXT_CSD_BUS_WIDTH		183	/* R/W */
>  #define EXT_CSD_HS_TIMING		185	/* R/W */
> @@ -177,6 +183,12 @@
>  #define EXT_CSD_BUS_WIDTH_4	1	/* Card is in 4 bit mode */
>  #define EXT_CSD_BUS_WIDTH_8	2	/* Card is in 8 bit mode */
>  
> +#define EXT_CSD_BOOT_ACK_ENABLE			(1<<6)
> +#define EXT_CSD_BOOT_PARTITION_ENABLE		(1<<3)
> +#define EXT_CSD_PARTITION_ACCESS_ENABLE		(1<<0)
> +#define EXT_CSD_PARTITION_ACCESS_DISABLE	(0<<0)
> +
> +
>  #define R1_ILLEGAL_COMMAND		(1 << 22)
>  #define R1_APP_CMD			(1 << 5)
>  
> @@ -275,6 +287,10 @@ int board_mmc_getcd(struct mmc *mmc);
>  int mmc_switch_part(int dev_num, unsigned int part_num);
>  int mmc_getcd(struct mmc *mmc);
>  void spl_mmc_load(void) __noreturn;
> +int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize,
> +					unsigned long rpmbsize);
> +int mmc_boot_open(struct mmc *mmc);
> +int mmc_boot_close(struct mmc *mmc);
>  
>  #ifdef CONFIG_GENERIC_MMC
>  #define mmc_host_is_spi(mmc)	((mmc)->host_caps & MMC_MODE_SPI)
>