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need help with CompactFlash/PCMCIA

Subject: need help with CompactFlash/PCMCIA
From: Ulrich Eckhardt <>
Date: Tue, 15 Mar 2005 12:45:15 +0100
Organization: Sator Laser GmbH
Original-recipient: rfc822;
User-agent: KMail/1.7.1

I have a board here which roughly resembles a DB1100, AFAICT. My problem is 
that I can't get the CompactFlash card to be recognized, and I don't even 
know where exactly it fails.
So, a few questions up front:
1. CompactFlash is accessed via PCMCIA, it does not use the MTD 
infrastructure, right? I also read that the CF then appears as a normal(?) 
ATA device. So, what should be the right drivers for it?
2. How can I find out if it's looking at the right addresses? I just need some 
kind of register which I can probe to find out if the device is where I think 
it should be.

Hmm, in fact I'd be happy about _any_ hint the would get me further. I'm 
slightly desparate...

Appended is a patch that removes an unused variable, something I found while 
trying to understand what's going on there.




Index: au1000_generic.c
RCS file: /home/cvs/linux/drivers/pcmcia/au1000_generic.c,v
retrieving revision 1.18
diff -u -r1.18 au1000_generic.c
--- au1000_generic.c 25 Jan 2005 04:28:38 -0000 1.18
+++ au1000_generic.c 15 Mar 2005 11:40:26 -0000
@@ -66,10 +66,6 @@
 #define PCMCIA_SOCKET(x) (au1000_pcmcia_socket + (x))
 #define to_au1000_socket(x) container_of(x, struct au1000_pcmcia_socket, 
-/* Some boards like to support CF cards as IDE root devices, so they
- * grab pcmcia sockets directly.
- */
-u32 *pcmcia_base_vaddrs[2];
 extern const unsigned long mips_io_port_base;
@@ -437,7 +433,6 @@
    skt->phys_mem = AU1X_SOCK1_PSEUDO_PHYS_MEM;
-  pcmcia_base_vaddrs[i] = (u32 *)skt->virt_io;
   ret = ops->hw_init(skt);
   skt->socket.features = SS_CAP_STATIC_MAP|SS_CAP_PCCARD;

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