arasan-sdhci eMMC Problem 'command timeout'

[Ahmad Fatoum]

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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