sdhc/mpc8536 - SDCard always detected like read-only

[Carlos Roberto Moratelli]

I will try address the issue in details.

When I insert the SDCard, the same is detect like read-only:

mmcblk0: mmc0:b368 NCard 966 MiB (ro)
mmcblk0:
mmc0: starting CMD18 arg 00000000 flags 000000b5
mmc0:     blksz 512 blocks 8 flags 00000200 tsac 100 ms nsac 0
mmc0:     CMD12 arg 00000000 flags 0000049d
sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x0000000a
sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
mmc0: req done (CMD18): 0: 00000900 00000000 00000000 00000000
mmc0:     4096 bytes transferred: 0
mmc0:     (CMD12): 0: 00000b00 00000000 00000000 00000000
p1

So, I just can mount the filesystem read-only. I can read the fat32
without problems.

I tested your sugestion. I used sdhci,wp-inverted in my dtb. This
changed the behavior. Now the SDCard is detected without the read-only
flag:

mmcblk0: mmc0:b368 NCard 966 MiB 
mmcblk0:
mmc0: starting CMD18 arg 00000000 flags 000000b5
mmc0:     blksz 512 blocks 8 flags 00000200 tsac 100 ms nsac 0
mmc0:     CMD12 arg 00000000 flags 0000049d
sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x0000000a
sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
mmc0: req done (CMD18): 0: 00000900 00000000 00000000 00000000
mmc0:     4096 bytes transferred: 0
mmc0:     (CMD12): 0: 00000b00 00000000 00000000 00000000
p1

And, I can mount a rw filesystem:

#mount  /dev/mmcblock1 /mnt
#cat /proc/mounts
...
/dev/mmcblock1 /mnt vfat
rw,relatime,fmask=0000,dmask=0000,allow_utime=0022,codepage=cp437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro 0 0
...

So, I can copy files to the mounted SDCard. But, When I try to umount I
see the following error mensagens:

#cp /etc/shadow /mnt
#ls /mnt
shadow
#umount /mnt
mmc0: Timeout waiting for hardware interrupt.
mmcblk0: error -110 transferring data, sector 5944, nr 1, card status
0x900
end_request: I/O error, dev mmcblk0, sector 5944
mmc0: Timeout waiting for hardware interrupt.
mmcblk0: error -110 transferring data, sector 5936, nr 1, card status
0x900
end_request: I/O error, dev mmcblk0, sector 5936
Buffer I/O error on device mmcblk0p1, logical block 3888
mmc0: Timeout waiting for hardware interrupt.
mmcblk0: error -110 transferring data, sector 2049, nr 1, card status
0x900
end_request: I/O error, dev mmcblk0, sector 2049
Buffer I/O error on device mmcblk0p1, logical block 1
mmc0: Timeout waiting for hardware interrupt.
mmcblk0: error -110 transferring data, sector 2080, nr 1, card status
0x900
end_request: I/O error, dev mmcblk0, sector 2080
...

I think I need the sdhci,wp-inverted in my dtb. But, it appears that
more something is necessary.

Has someone faced this situation?

Thanks by the help until here.

Regards,

Moratelli



Em Qua, 2011-04-06 às 01:48 +0200, Wolfram Sang escreveu:
> > 		sdhci at 2e000 {
> > 			compatible = "fsl,mpc8536-esdhc", "fsl,esdhc";
> > 			reg = <0x2e000 0x1000>;
> > 			interrupts = <72 0x2>;
> > 			interrupt-parent = <&mpic>;
> > 			/* Filled in by U-Boot */
> > 			clock-frequency = <0>;
> > 		};
> 
> Hmm, I am not too familiar with those SoCs, yet some 83xx needed
> 
> 	sdhci,wp-inverted;
> 
> here. Maybe yours, too? Would fit the symptoms.
> 
> Regards,
> 
>    Wolfram
>