[U-Boot] [U-BOOT][PATCH] mmc: support the revision check for eMMC4.5

[Jae hoon Chung]

Hi,

Anybody think about this patch?
mmcinfo is produce correctly?

if i miss something, let me know, plz.

Best Regards,
Jaehoon Chung

2012/3/27 Jaehoon Chung <jh80.chung at samsung.com>:
> eMMC card is introduced the eMMC4.5.
> But now eMMC card is checked up to eMMC4.0.
> This patch is supported until eMMC4.5
>
> Signed-off-by: Jaehoon Chung <jh80.chung at samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
> ---
>  common/cmd_mmc.c  |    5 ++++-
>  drivers/mmc/mmc.c |   25 +++++++++++++++++++++++++
>  include/mmc.h     |    8 ++++++++
>  3 files changed, 37 insertions(+), 1 deletions(-)
>
> diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c
> index 8f13c22..ff150ca 100644
> --- a/common/cmd_mmc.c
> +++ b/common/cmd_mmc.c
> @@ -106,7 +106,10 @@ static void print_mmcinfo(struct mmc *mmc)
>        printf("Rd Block Len: %d\n", mmc->read_bl_len);
>
>        printf("%s version %d.%d\n", IS_SD(mmc) ? "SD" : "MMC",
> -                       (mmc->version >> 4) & 0xf, mmc->version & 0xf);
> +                       (mmc->version >> 4) & 0xf,
> +                       (mmc->version & 0xf) == EXT_CSD_REV_1_5 ?
> +                       41 :((mmc->version & 0xf) > EXT_CSD_REV_1_5 ?
> +                       (mmc->version & 0xf) - 1 : (mmc->version & 0xf)));
>
>        printf("High Capacity: %s\n", mmc->high_capacity ? "Yes" : "No");
>        puts("Capacity: ");
> diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
> index 49c3349..e035012 100644
> --- a/drivers/mmc/mmc.c
> +++ b/drivers/mmc/mmc.c
> @@ -651,6 +651,31 @@ int mmc_change_freq(struct mmc *mmc)
>        if (err)
>                return err;
>
> +       switch (ext_csd[EXT_CSD_REV]) {
> +       case EXT_CSD_REV_1_0:
> +               mmc->version |= EXT_CSD_REV_1_0;
> +               break;
> +       case EXT_CSD_REV_1_1:
> +               mmc->version |= EXT_CSD_REV_1_1;
> +               break;
> +       case EXT_CSD_REV_1_2:
> +               mmc->version |= EXT_CSD_REV_1_2;
> +               break;
> +       case EXT_CSD_REV_1_3:
> +               mmc->version |= EXT_CSD_REV_1_3;
> +               break;
> +       case EXT_CSD_REV_1_5:
> +               mmc->version |= EXT_CSD_REV_1_5;
> +               break;
> +       case EXT_CSD_REV_1_6:
> +               mmc->version |= EXT_CSD_REV_1_6;
> +               break;
> +       case EXT_CSD_REV_1_4:
> +       default:
> +               printf("Unknown revision - %x\n", ext_csd[EXT_CSD_REV]);
> +               return 0;
> +       }
> +
>        /* No high-speed support */
>        if (!ext_csd[EXT_CSD_HS_TIMING])
>                return 0;
> diff --git a/include/mmc.h b/include/mmc.h
> index 30c2375..726da99 100644
> --- a/include/mmc.h
> +++ b/include/mmc.h
> @@ -157,6 +157,14 @@
>  #define EXT_CSD_SEC_CNT                        212     /* RO, 4 bytes */
>  #define EXT_CSD_HC_ERASE_GRP_SIZE      224     /* RO */
>
> +#define EXT_CSD_REV_1_0                        0
> +#define EXT_CSD_REV_1_1                        1
> +#define EXT_CSD_REV_1_2                        2
> +#define EXT_CSD_REV_1_3                        3
> +#define EXT_CSD_REV_1_4                        4
> +#define EXT_CSD_REV_1_5                        5
> +#define EXT_CSD_REV_1_6                        6
> +
>  /*
>  * EXT_CSD field definitions
>  */
> --
> 1.7.4.1
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