[U-Boot] exynos: snow: external SD/MMC broken

[Guillaume Gardet]

Le 04/12/2014 09:00, Jaehoon Chung a écrit :
> Hi, GUillaume
>
> On 12/04/2014 09:18 AM, Minkyu Kang wrote:
>> + Jaehoon Chung
>>
>> On 04/12/14 00:23, Guillaume Gardet wrote:
>>> Hi,
>>>
>>> while trying latest u-boot GIT on snow (Google Chromebook ARM), I encountered some problems with external SD card.
>>> I cannot access to external SD card ('mmc dev 1' just returns 'Card did not respond to voltage select!' and then 'Timeout') whereas I have access to internal eMMC (with 'mmc dev 0').
> Did you check SD-card's power and clock line? "Timeout" is not important.

I cannot, it is a laptop, not a dev board. :(

>
>>> Any idea what could be the problem?
> You can enable CONFIG_MMC_TRACE, and you can also print debug message into dw-mmc.c
> Could you share it?

mmc dev 1 returns lots of things and I cannot scroll the screen and I cannot redirect cmd output to a file (could I?). (I have no serial cable).
Here is the end of the log on 1st try (when booted from USB stick):
********************************************************************************
....
CMD_SEND:3
                         ARG                               0x00000000
                         MMC_RSP_R1,5,6,7        0xB3680520
CMD_SEND:9
                         ARG                               0xB3680000
                         MMC_RSP_R2                 0x400E0032
0x5B590000
0x3C1D7F80
0x0A400063

DUMPING DATA
                                                               000 - 40 0E 00 32
                                                               004 - 5B 59 00 00
                                                               008 - 3C 1D 7F 80
                                                               012 - 0A 40 00 63
CMD_SEND:13
                         ARG                               0xB3680000
                         MMC_RSP_R1,5,6,7        0x00000700
CURR_STATE:3
CMD_SEND:7
                         ARG                               0xB3680000
                         MMC_RSP_R1,5,6,7        0x00000700
CMD_SEND:55
                         ARG                               0xB3680000
                         MMC_RSP_R1,5,6,7        0x00000920
CMD_SEND:51
                         ARG                               0x00000000
                         MMC_RSP_R1,5,6,7        0x00000920
CMD_SEND:6
                         ARG                               0x00FFFFF1
                         MMC_RSP_R1,5,6,7        0x00000900
CMD_SEND:6
                         ARG                               0x80FFFFF1
                         MMC_RSP_R1,5,6,7        0x00000900
CMD_SEND:55
                         ARG                               0xB3680000
dwmci_send_cmd: Response Error.
                         MMC_RSP_R1,5,6,7        0x00000700
********************************************************************************

Next tries always returns:
********************************************************************************
CMD_SEND:0
                         ARG                               0x00000000
dwmci_send_cmd: Timeout.
                         MMC_RSP_NONE
********************************************************************************



When I boot from SD card (u-boot chainload), on 1st try, it returns:
********************************************************************************
CMD_SEND:0
                         ARG                               0x00000000
                         MMC_RSP_NONE
CMD_SEND:8
                         ARG                               0x000001AA
dwmci_send_cmd: Response Error.
                         MMC_RSP_R1,5,6,7        0x00000008
CMD_SEND:55
                         ARG                               0x00000000
dwmci_send_cmd: Response Error.
                         MMC_RSP_R1,5,6,7        0x00000008
********************************************************************************


Guillaume