[U-Boot] [OT] - Seeking information Re: Memory Mapped CF Card (IDE) and Linux

[U-Boot] [OT] - Seeking information Re: Memory Mapped CF Card (IDE) and Linux

[Graeme Russ]

Hi All,

I'm looking for information on how to access a Compact Flash card which is
memory-mapped (from 0x20001000)

[U-Boot] [OT] - Seeking information Re: Memory Mapped CF Card (IDE) and Linux

[Mike Frysinger]

On Friday 30 April 2010 10:11:53 Graeme Russ wrote:
> I'm looking for information on how to access a Compact Flash card which is
> memory-mapped (from 0x20001000)
> 
> From what I have read, there a 3 address lines (8 addresses) which access
> IDE registers within the CF chip
> 
> My question is, how do I access such a custom address range within Linux?

wouldnt this be a better question posted to lkml and/or the linux-ide lists ?

> I'm looking at the 'OF-platform PATA driver' which appears to be what I
> want (a very basic IDE driver) but I am a bit lost on how to set up a
> specific base address.
> 
> Where should I look for examples of CF cards mapped to specific address
> spaces?

we do it on the Blackfin quite a bit using the pata platform driver:
http://docs.blackfin.uclinux.org/doku.php?id=hw:cards:cf-ide-nand
-mike
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[U-Boot] [OT] - Seeking information Re: Memory Mapped CF Card (IDE) and Linux

[Marek Vasut]

Dne P? 30. dubna 2010 16:11:53 Graeme Russ napsal(a):
> Hi All,
> 
> I'm looking for information on how to access a Compact Flash card which is
> memory-mapped (from 0x20001000)
> 
> From what I have read, there a 3 address lines (8 addresses) which access
> IDE registers within the CF chip
> 
> My question is, how do I access such a custom address range within Linux?
> 
> I'm looking at the 'OF-platform PATA driver' which appears to be what I
> want (a very basic IDE driver) but I am a bit lost on how to set up a
> specific base address.
> 
> Where should I look for examples of CF cards mapped to specific address
> spaces?
> 
> TIA

Hey, look at pata_platform.c driver. Without any additional setup, your drive 
will work. You just specify IRQ line (if any) and CTL and CMD addresses.

Cheers
> 
> Graeme
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