Re: MMC problem OMAP

[Anderson Briglia <anderson.briglia@indt.org.br>]

Hi Prakash,

I did a quick test here and seems that the MMC code for 1510 Innovator is working
properly. I used the 1510's defconfig and a rootfilesystem with UDEV installed, so I did
not worry about the device's node creation, it was done automatically at /dev/mmcblk0p1. I
created an ext2 partition at the MMC card and mounted it without problems.

For your reference:
root@arm:~# ls -la /dev/mmcblk0p1
brw-rw----  1 root disk 254, 1 Dec 31  1969 /dev/mmcblk0p1

I noticed only a problem, that is that the MMC card is recognized only at boot process,
but I think it is related to a hardware issue on 1510 Innovator.

Best Regards,

Anderson Briglia

> 
>>>I am trying to mount MMC/SD file system in OMAP 1510 (TI Innovator).
> 
> I
> 
>>>have enabled SD support and ext2 support in the kernel
>>>(2.6.16.13-omap1).  When the kernel boots up the following messages
> 
> are
> 
>>>coming. 
>>>
>>>1)       Anyone got the same error?  What is the source of the error?
> 
> 
>>Seems that you do not have a valid partition table available in the MMC
> 
> card and/or the
> 
>>MMC card is broken. AFAIK, the MMC code available for OMAP 1510
> 
> Innovator is not broken,
> 
>>but I still not tested it recently. Use fdisk to make an ext2 partition
> 
> in the MMC and
> 
>>test again, if it is already done let me know and I will test the
> 
> latest >Innovator MMC
> 
>>code to give you some feedback.
> 
> 
> 
> I tried with latest GIT (2.6.17-rc6-omap1)which looks like recognizing
> the device without this problem.  That means what you said is correct
> there was some broken link in kerenel 2.6.16.13.  We used the fdisk to
> make ext2 partition.  I am attaching the kernel dmesg down for your ref.
> 
> 
>>>2)       Anyone mounted a ext2 file system from MMC/SD?  How do I go
>>>about doing this?
> 
> 
>>Yes. I guess you can do this just setting up the MMC card properly and
>>using 'mount'. :)
> 
> 
> To use mount I should have /dev/xxx, which is the device used.  I
> created statically /dev/mmc and /dev/mmc1 (with major number 254 and
> minors 0 and 1).  But it looks this is not properly initialized as cat
> /dev/mmc gives 'no such device' message. I find in /sys somethings
> related to mmc.
> 
> 
> MUX: initialized MMC_CMD
> MUX: initialized MMC_DAT0
> MUX: initialized MMC_DAT1
> MUX: initialized MMC_DAT2
> MUX: initialized MMC_DAT3
> mmc0: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0
> mmc0: clock 0Hz busmode 1 powermode 1 cs 0 Vdd 21 width 0
> CMD 0080
> mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 21 width 0
> mmc0: clock 400000Hz busmode 1 powermode 2 cs 1 Vdd 21 width 0
> mmc0: starting CMD0 arg 00000000 flags 00000040
> mmci-omap mmci-omap.1: MMC IRQ 0001 (CMD 0): EOC
> mmc0: req done (CMD0): 0/0/0: 00000000 00000000 00000000 00000000
> mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 21 width 0
> mmc0: starting CMD55 arg 00000000 flags 00000015
> mmci-omap mmci-omap.1: MMC IRQ 0001 (CMD 55): EOC
> mmc0: req done (CMD55): 0/0/0: 00000120 00000000 00000000 00000000
> mmc0: starting CMD41 arg 00000000 flags 00000061
> mmci-omap mmci-omap.1: MMC IRQ 1001 (CMD 41): EOC OCRB
> mmc0: req done (CMD41): 0/0/0: 00ff8000 00000000 00000000 00000000
> mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 20 width 0
> mmc0: clock 400000Hz busmode 1 powermode 2 cs 1 Vdd 20 width 0
> mmc0: starting CMD0 arg 00000000 flags 00000040
> mmci-omap mmci-omap.1: MMC IRQ 0001 (CMD 0): EOC
> mmc0: req done (CMD0): 0/0/0: 00000000 00000000 00000000 00000000
> mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 20 width 0
> mmc0: starting CMD55 arg 00000000 flags 00000015
> mmci-omap mmci-omap.1: MMC IRQ 0001 (CMD 55): EOC
> mmc0: req done (CMD55): 0/0/0: 00000120 00000000 00000000 00000000
> mmc0: starting CMD41 arg 00300000 flags 00000061
> mmci-omap mmci-omap.1: MMC IRQ 1001 (CMD 41): EOC OCRB
> mmc0: req done (CMD41): 0/0/0: 00ff8000 00000000 00000000 00000000
> mmc0: starting CMD55 arg 00000000 flags 00000015
> mmci-omap mmci-omap.1: MMC IRQ 0001 (CMD 55): EOC
> mmc0: req done (CMD55): 0/0/0: 00000120 00000000 00000000 00000000
> mmc0: starting CMD41 arg 00300000 flags 00000061
> mmci-omap mmci-omap.1: MMC IRQ 0001 (CMD 41): EOC
> mmc0: req done (CMD41): 0/0/0: 80ff8000 00000000 00000000 00000000
> mmc0: starting CMD2 arg 00000000 flags 00000067
> mmci-omap mmci-omap.1: MMC IRQ 0001 (CMD 2): EOC
> mmc0: req done (CMD2): 0/0/0: 03534453 44303136 55402379 370043ad
> mmc0: starting CMD3 arg 00000000 flags 00000065
> mmci-omap mmci-omap.1: MMC IRQ 4000 (CMD 3): CERR
> mmci-omap mmci-omap.1: card status error (CMD3)
> mmc0: req done (CMD3): 4/0/0: a95c0520 00000000 00000000 00000000
> mmci-omap mmci-omap.1: MMC IRQ 4000 (CMD 3): CERR
> mmci-omap mmci-omap.1: card status error (CMD3)
> mmc0: req done (CMD3): 4/0/0: a95d0700 00000000 00000000 00000000
> mmci-omap mmci-omap.1: MMC IRQ 4000 (CMD 3): CERR
> mmci-omap mmci-omap.1: card status error (CMD3)
> mmc0: req done (CMD3): 4/0/0: a95e0700 00000000 00000000 00000000
> mmci-omap mmci-omap.1: MMC IRQ 4000 (CMD 3): CERR
> mmci-omap mmci-omap.1: card status error (CMD3)
> mmc0: req done (CMD3): 4/0/0: a95f0700 00000000 00000000 00000000
> mmc0: starting CMD2 arg 00000000 flags 00000067
> mmci-omap mmci-omap.1: MMC IRQ 0080 (CMD 2): CTO
> mmc0: req done (CMD2): 1/0/0: 00000000 00000000 00000000 00000000
> mmci-omap mmci-omap.1: MMC IRQ 0080 (CMD 2): CTO
> mmc0: req done (CMD2): 1/0/0: 00000000 00000000 00000000 00000000
> mmci-omap mmci-omap.1: MMC IRQ 0080 (CMD 2): CTO
> mmc0: req done (CMD2): 1/0/0: 00000000 00000000 00000000 00000000
> mmci-omap mmci-omap.1: MMC IRQ 0080 (CMD 2): CTO
> mmc0: req done (CMD2): 1/0/0: 00000000 00000000 00000000 00000000
> mmc0: clock 400000Hz busmode 2 powermode 2 cs 0 Vdd 20 width 0
> mmc0: selected 24.000MHz transfer rate
> mmc0: clock 24000000Hz busmode 2 powermode 2 cs 0 Vdd 20 width 0
> mmc0: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0
> 
>