From: Guillaume Gardet <guillaume.gardet@free.fr>
To: u-boot@lists.denx.de
Subject: [U-Boot] exynos: snow: external SD/MMC broken
Date: Thu, 04 Dec 2014 10:11:14 +0100 [thread overview]
Message-ID: <54802531.8030309@free.fr> (raw)
In-Reply-To: <5480148B.6050502@samsung.com>
Le 04/12/2014 09:00, Jaehoon Chung a ?crit :
> 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
next prev parent reply other threads:[~2014-12-04 9:11 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-03 15:23 [U-Boot] exynos: snow: external SD/MMC broken Guillaume Gardet
2014-12-04 0:18 ` Minkyu Kang
2014-12-04 8:00 ` Jaehoon Chung
2014-12-04 9:11 ` Guillaume Gardet [this message]
2014-12-04 18:11 ` Suriyan Ramasami
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