[PATCH v2 1/7] mmc: mxs-mmc: add mmc host driver for i.MX23/28

[Wolfram Sang]

> Ah, yes.  I can also see the problem here after turning on
> DEBUG_SPINLOCK.

Ah, okay. After turning it off, it works a lot better :)

SD seems to work:

	mmc0: new high speed SD card at address b368
	mmcblk0: mmc0:b368 NCard 1.86 GiB 
	 mmcblk0: p1
	mmc0: card b368 removed

SDHC seems to work:

	mmc0: new high speed SDHC card at address 0007
	mmcblk0: mmc0:0007 SD04G 3.70 GiB 
	 mmcblk0: p1
	mmc0: card 0007 removed

MMC fails for me (note: the card works fine with an mx35-based board)

	mmc0: new high speed MMC card at address 0001
	mmcblk0: mmc0:0001 AF HMP 247 MiB 
	mmcblk0: retrying using single block read
	mmcblk0: error -84 transferring data, sector 0, nr 8, card status 0x900
	end_request: I/O error, dev mmcblk0, sector 0
	mmcblk0: error -84 transferring data, sector 1, nr 7, card status 0x900
	end_request: I/O error, dev mmcblk0, sector 1
	mmcblk0: error -84 transferring data, sector 2, nr 6, card status 0x900
	end_request: I/O error, dev mmcblk0, sector 2
	mmcblk0: error -84 transferring data, sector 3, nr 5, card status 0x900
	end_request: I/O error, dev mmcblk0, sector 3
	mmcblk0: error -84 transferring data, sector 4, nr 4, card status 0x900
	end_request: I/O error, dev mmcblk0, sector 4
	mmcblk0: error -84 transferring data, sector 5, nr 3, card status 0x900
	end_request: I/O error, dev mmcblk0, sector 5
	mmcblk0: error -84 transferring data, sector 6, nr 2, card status 0x900
	end_request: I/O error, dev mmcblk0, sector 6
	mmcblk0: error -84 transferring data, sector 7, nr 1, card status 0x900
	end_request: I/O error, dev mmcblk0, sector 7
	Buffer I/O error on device mmcblk0, logical block 0
	mmcblk0: retrying using single block read
	mmcblk0: error -84 transferring data, sector 0, nr 8, card status 0x900
	end_request: I/O error, dev mmcblk0, sector 0
	mmcblk0: error -84 transferring data, sector 1, nr 7, card status 0x900
	end_request: I/O error, dev mmcblk0, sector 1
	mmcblk0: error -84 transferring data, sector 2, nr 6, card status 0x900
	end_request: I/O error, dev mmcblk0, sector 2
	mmcblk0: error -84 transferring data, sector 3, nr 5, card status 0x900
	end_request: I/O error, dev mmcblk0, sector 3
	mmcblk0: error -84 transferring data, sector 4, nr 4, card status 0x900
	end_request: I/O error, dev mmcblk0, sector 4
	mmcblk0: error -84 transferring data, sector 5, nr 3, card status 0x900
	end_request: I/O error, dev mmcblk0, sector 5
	mmcblk0: error -84 transferring data, sector 6, nr 2, card status 0x900
	end_request: I/O error, dev mmcblk0, sector 6
	mmcblk0: error -84 transferring data, sector 7, nr 1, card status 0x900
	end_request: I/O error, dev mmcblk0, sector 7
	Buffer I/O error on device mmcblk0, logical block 0
	 mmcblk0: unable to read partition table
	mmc0: card 0001 removed

SDIO card locks the machine. Is it supposed to work already?

Regards,

   Wolfram

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Pengutronix e.K.                           | Wolfram Sang                |
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