PCMCIA on an MPC860

Magnus Damm damm at opensource.se
Fri Aug 23 19:32:20 EST 2002

I've not used the driver together with a 2.4 kernel,
so I'm not sure how well modules from pcmcia-cs plays
with pcmcia stuff in the kernel.

Linux-2.4.19 has a version of the driver that
Matthew Locke modified and bugfixed. Maybe that one
works better with 2.4 kernels.

What happens if you decode the OOPS?

To get symbols, use the file System.map from
the kernel together with the map generated by
"insmod -m".
Or use /proc/ksysms from the running system.

"cardctl ident" and "cardctl status" only reads
the CIS and checks the pin status. (Correct me
if I remember wrong).

I think it will be the ide-driver that starts
accessing the IO-space. Maybe that doesn't work.

/ Magnus

Alex Zeffertt wrote:
> All,
> Has anybody had any luck getting PCMCIA to work on an MPC860?
> I have a custom MPC860 board, with a single PCMCIA socket connected to Slot B.  This is what I have
> so far done:
> 1.
> Downloaded pcmcia-cs-3.2.0.tar.gz
> 2.
> Added board specific definitions in modules/m8xx_pcmcia.c for
>                 hardware_enable()
>                 hardware_disable()
>                 voltage_set()
>                 socket_get()
> 3.
> Cross compiled for the 8xx.
> 4.
> In my kernel (linux-2.4.4-2001-11-24 from Denx) I added the following lines
>                 include/asm-ppc/<board>.h:
>                         /* define IO_BASE for pcmcia */
>                         #define _IO_BASE 0x80000000
>                         #define _IO_BASE_SIZE (1024*64)
>                 arch/ppc/mm/init.c:
>                         void __init MMU_init(void) {
>                         ...
>                         ioremap(_IO_BASE,_IO_BASE_SIZE);
>         ...as suggested by Magnus Damm in
>         http://lists.linuxppc.org/linuxppc-embedded/200005/msg00227.html
> 5.      When I boot my board with a Flash card in the PCMCIA slot, and I run:
>         /etc/rc.d/rc.pcmcia start
>         I find that ide_cs.o causes an Oops when it calls ide_register().  "cardctl status"
>         and "cardctl ident" work though.
> Can anybody suggest what I'm doing wrong?
> Thanks in advance,
> Alex

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