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

[Jaehoon Chung]

Hi Marek,

I will resend this patch with Andy's comment.
If you have any other opinion, let me know plz.

Best Regards,
Jaehoon Chung

On 09/01/2012 03:15 PM, Marek Vasut wrote:
> Dear Jae hoon Chung,
> 
>> Hi,
>>
>> Anybody think about this patch?
>> mmcinfo is produce correctly?
>>
>> if i miss something, let me know, plz.
> 
> Andy?
> 
>> 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
>>> _______________________________________________
>>> U-Boot mailing list
>>> U-Boot at lists.denx.de
>>> http://lists.denx.de/mailman/listinfo/u-boot
>>
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