[U-Boot] mmc: fsl_esdhc: eMMC boot: CMD_ERR (-ECOMM) in u-boot while accessing SD

[Jaehoon Chung]

Hi,

On 01/20/2017 12:37 AM, Jagan Teki wrote:
> On Sun, Jan 15, 2017 at 5:40 PM, Jagan Teki <jagan at openedev.com> wrote:
>> Hi,
>>
>> I've observed the CMD_ERR in U-Boot while accessing SD with boot from
>> eMMC on i.MX6 board.
>>
>> SPL initializing SD as well eMMC controllers
>> a) On SD bootmode: from u-boot prompt mmc dev 0 and mmc dev 1 is
>> getting probe SD and eMMC
>> b) On eMMC bootmode: from u-boot prompt mmc dev 0 is returning with
>> -ECOMM in esdhc_send_cmd funtion of fsl_esdhc.c (see the below Log)
>> but mmc dev 1 probed eMMC correctly
>>
>> Log:
>> -----
>> icorem6qdl-rqs> mmc dev 0
>>
>> esdhc_send_cmd: MMC=0x0 addr = 0x2198000, CMD0
>>
>> esdhc_send_cmd: MMC=0x0 addr = 0x2198000, CMD8
>>
>> ECOMM irqstat=0xc0001 CMD8
>>
>> esdhc_send_cmd: MMC=0x0 addr = 0x2198000, CMD55
>>
>> ECOMM CMD55
>> mmc_init: -70, time 53
>>
>> With the above log, seems like irqstat has error with
>> BIT19 -CIE-Command Index Error
>> BIT18-CEBE-Command End Bit Error
>>
>> Usually once the CMD8 is executed based on the response the controller
>> will switch to SD or MMC so further communication commands being
>> changes based on that, but here due to controller irqstat error the
>> controller is unable to switch to SD here.
>>
>> The actual working log is [1], this is booting from SD and here is
>> full log[2] for booting from eMMC.
>>
>> [1] https://paste.ubuntu.com/23800820/
>> [2] https://paste.ubuntu.com/23800833/
>>
>> Request for any help.
> 
> Did anyone find this issue? any clue?

Sorry for late..I didn't see this issue..but i will check it..

Best Regards,
Jaehoon Chung

> 
>