AW: arasan-sdhci eMMC Problem 'command timeout'

[Ahmad Fatoum]

On 07.10.22 16:13, michael.graichen at hotmail.com wrote:
> 
> Hey, 
> 
> thanks for your advices. Adding "no-sd" really solved it.

Good to know. Keep in mind that's just a work-around though.
I highly encourage you to debug it... :D

Cheers,
Ahmad

> 
> Best Regards 
> Michael
> 
> 
> ________________________________________
> Von: Ahmad Fatoum <a.fatoum at pengutronix.de>
> Gesendet: Donnerstag, 6. Oktober 2022 15:13
> An: michael.graichen at hotmail.com; barebox at lists.infradead.org
> Betreff: Re: arasan-sdhci eMMC Problem 'command timeout'
> 
> Hello,
> 
> On 06.10.22 15:03, michael.graichen at hotmail.com wrote:
>> Hey,
>>
>> I have connected an eMMC to sdhci0 and a uSD Card to sdhci1 of a Zynq.
>> while the uSD Card seams to work fine i'm getting the error
>>
>> arasan-sdhci e0100000.mmc at e0100000.of: registered as mmc0
>> arasan-sdhci e0100000.mmc at e0100000.of: SDHCI_INT_ERROR: 0x00000001
>> arasan-sdhci e0100000.mmc at e0100000.of: error while transfering data for command 8
>> arasan-sdhci e0100000.mmc at e0100000.of: state = 0x01ff0001 , interrupt = 0x00018000
>> arasan-sdhci e0100000.mmc at e0100000.of: SDHCI_INT_ERROR: 0x00000001
>> arasan-sdhci e0100000.mmc at e0100000.of: error while transfering data for command 55
>> arasan-sdhci e0100000.mmc at e0100000.of: state = 0x01ff0001 , interrupt = 0x00018000
>>
>> from the eMMC.
> 
> Please try adding no-sd to your eMMC device tree node and try again.
> I don't know why it's necessary, because falling back to MMC after
> SD fails is normal operation on all other hosts. I don't have the
> hardware, but I've seen that the recently added device trees that
> use the arasan, set this in barebox for the eMMC node.
> 
>>
>> arasan-sdhci e0101000.mmc at e0101000.of: registered as mmc1
>> mmc1: detected SD card version 2.0
>> mmc1: registered mmc1
>>
>> both eMMC and SDCard work fine in Linux. So I think the Problem is some confuguration difference between Linux and barebox.
>> The MMC is from type MTFC8G but Linux detects it as
>>
>> [    2.012122] mmc0: new high speed MMC card at address 0001
>> [    2.021129] mmcblk0: mmc0:0001 Q2J55L 7.09 GiB
>> [    2.026355] Btrfs loaded, crc32c=crc32c-generic, zoned=no, fsverity=no
>> [    2.027458] mmcblk0boot0: mmc0:0001 Q2J55L 16.0 MiB
>> [    2.031509] mmcblk0boot1: mmc0:0001 Q2J55L 16.0 MiB
>> [    2.039829] mmcblk0rpmb: mmc0:0001 Q2J55L 4.00 MiB, chardev (245:0)
>>
>> Unfortunattly I'm not very familliar with SDHCI, so I would apreciate any help.
> 
> If it's indeed resolved by no-sd, this sound like a good occasion to dig
> deeper into the SDHCI. ;)
> 
> Let me know if that works for you.
> 
> Cheers,
> Ahmad
> 
> 
>>
>> Best Regards
>> Michael
>>
>>
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> 
> 
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> 


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Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
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