Re: PCMCIA on TQM8xxL

Re: PCMCIA on TQM8xxL

[Leonardo Pereira Santos]

1) Define _IO_BASE and _IO_BASE_SIZE in arch/ppc/platforms/tqm8xxl.h
2) just copy and paste the line of code for the RPX to TQM8xxL section in
arch/ppc/kernel/m8xx_setup.c m8xx_map_io(), as you pointed. If there's no
#ifdef CONFIG_TQM8XXL (or something like that), just create one near the ones
already defined for FADS, RPX, MBX. For example, for my FADS board, its
section looks like this:

#ifdef CONFIG_FADS
	io_block_mapping(BCSR_ADDR, BCSR_ADDR, BCSR_SIZE, _PAGE_IO);
	io_block_mapping(_IO_BASE,_IO_BASE,_IO_BASE_SIZE, _PAGE_IO);
#endif

the first call to io_block_mapping() maps the EPLD's registers, the second the
PCMCIA address space. And that's it.

On Thursday 23 January 2003 08:16, Steven Scholz wrote:
> Wolfgang Grandegger wrote:
> > On 01/23/2003 10:52 AM Steven Scholz wrote:
> > > Hi there,
> > >
> > > this is about PCMCIA on TQM8xxL using DENX ELDK 2.0 with DENX
> > > linuxppc_2_4_devel CVS tree:
> > >
> > > I am confused:
> > >
> > > In order to get pcmcia working on mpc8xx one have to define a proper
> > > _IO_BASE and then ioremap it early enough so the physical address
> > > equals the virtual adress.
> > >
> > > That fair enough, but I just can't find the place where _IO_BASE is
> > > remapped for TQM8xxL.
> > >
> > > It should be done in arch/ppc/kernel/m8xx_setup.c:m8xx_map_io(), but
> > > there's no "#ifdef TQM8xxL" or something !?
> > >
> > > Any ideas, why it should work at all?
> >
> > Check "arch/ppc/platforms/tqm8xx.h", which is somehow include by
> > "include/asm-ppc/io.h".
>
> Thanks for your reply.
>
> I know _IO_BASE is defined in arch/ppc/platforms/tqm8xx.h.
> But IMHO it's never ioremapped like it is done for  RPC Boards in
> arch/ppc/kernel/m8xx_setup.c:m8xx_map_io():
>
> #if defined(CONFIG_RPXLITE) || defined(CONFIG_RPXCLASSIC)
>         io_block_mapping(RPX_CSR_ADDR, RPX_CSR_ADDR, RPX_CSR_SIZE,
> _PAGE_IO); #if !defined(CONFIG_PCI)
>         io_block_mapping(_IO_BASE,_IO_BASE,_IO_BASE_SIZE, _PAGE_IO);
> #endif
> #endif
>
> That's what I don't understand!
>
> My HW is similar to TQM8xx and I have to add something like
> #if defined(CONFIG_MYBOARD)
>         io_block_mapping(_IO_BASE,_IO_BASE,_IO_BASE_SIZE, _PAGE_IO);
> #endif
> to get PCMCIA working...
>
> Steven
>

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Leonardo Pereira Santos
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Re: PCMCIA on TQM8xxL

[Wolfgang Grandegger]

On 01/23/2003 03:02 PM Steven Scholz wrote:
>
> Leonardo Pereira Santos wrote:
>>
>>
>> 1) Define _IO_BASE and _IO_BASE_SIZE in arch/ppc/platforms/tqm8xxl.h
>> 2) just copy and paste the line of code for the RPX to TQM8xxL section in
>> arch/ppc/kernel/m8xx_setup.c m8xx_map_io(), as you pointed. If there's no
>> #ifdef CONFIG_TQM8XXL (or something like that), just create one near the ones
>> already defined for FADS, RPX, MBX. For example, for my FADS board, its
>> section looks like this:
>>
>> #ifdef CONFIG_FADS
>>         io_block_mapping(BCSR_ADDR, BCSR_ADDR, BCSR_SIZE, _PAGE_IO);
>>         io_block_mapping(_IO_BASE,_IO_BASE,_IO_BASE_SIZE, _PAGE_IO);
>> #endif
> ...
>
> I know. That's what I did.
>
> The problem is:
>
> DENX claims that PCMCIA is working on TQM8xxL using ELDK 2.0 and their linux CVS
> tree.
> But I can't see how! Since there's no remapping of _IO_BASE for TQM8xxL.
>
> Maybe I just have to wait until Wolfgang Denk is online again!

It's also not working on my TQM8xxL starter kit and I remember vaguely
that Wolfgang mentioned that the PCMCIA support ist not yet fully
implemented and tested (compared with our 2.4.4 kernel). But even with
io_block_mapping(_IO_BASE, ...) I still get an Oops in do_probe():

ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx
PCMCIA slot B: phys mem e0000000...ec000000 (size 0c000000)
Card ID: HITACHI FLASH 5.0
 Fixed Disk Card
 IDE interface
 [silicon] [unique] [single] [sleep] [standby] [idle] [low power]
Oops: kernel access of bad area, sig: 11
NIP: C00B69FC XER: 8000AA7F LR: C00B69D8 SP: C01F9EF0 REGS: c01f9e40
TRAP: 0300

Thanks,

Wolfgang.


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