Re: MPC5200 - problem with CF card

Eugene Surovegin [off-list ref] wrote on 05.01.2005 17:56:46:

On Wed, Jan 05, 2005 at 02:49:42PM +0000, J?n Benediktsson wrote:

quoted

quoted

I am working with a custom MPC5200 board which uses the built-in=20
ATA/IDE controller for a compact flash card.=20
The Linux kernel is Denx linux=5F2=5F4=5Fdevel.=20

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[snip]
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quoted

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mpc5xxx=5Fide: Setting up IDE interface ide0...=20
Probing IDE interface ide0...=20
hda: SanDisk SDCFBI-1024, ATA DISK drive=20
hdb: probing with STATUS(0x00) instead of ALTSTATUS(0x7f)=20
ide0: unexpected interrupt, status=3D0x00, count=3D1=20

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I had similar problem with some CF cards (while other like in your=20
case worked fine).
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Try disabling probing of the slave ide0 interface (hdb). I'm not=20
familiar with MPC5xxx, but most likely you can modify mpc5xxx=5Fide or=20
whatever code sets up access to your CF card.
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Find where an instance of ide=5Fhwif=5Ft is initialized for ide0 and add =

something like:
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   /* Don't probe second drive */
        hwif->drives[1].noprobe =3D 1;
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Thank you.  It was indeed the probing for the second drive that was=20
causing the problem.
Adding hdb=3Dnoprobe to the kernel command line (bootargs) fixes the proble=
m=20
without kernel modifications.

Thanks again,
Jon