From: Ben Warren <bwarren@qstreams•com>
To: Michael Brian Willis <willis@arlut•utexas.edu>
Cc: linuxppc-embedded@ozlabs•org
Subject: Re: MPC85xx and linux IDE driver
Date: Fri, 12 Oct 2007 15:48:26 -0400 [thread overview]
Message-ID: <470FCF8A.1000504@qstreams.com> (raw)
In-Reply-To: <1192213784.4862.48.camel@louie>
Michael Brian Willis wrote:
> Hello,
>
> I am using an MPC8540 based embedded system with a Compact Flash card in
> true IDE mode. The Compact Flash card is directly connected to the
> MPC8540 bus without the use of a pcmcia adapter.
>
> The Compact Flash card is being initialized correctly using the U-boot
> boot-loader and is working properly as an ide device in U-boot. However
> I cannot get linux to recognize the ide device.
>
> I have tried several different linux config options and have tried
> passing kernel command line options as advised in the
> Documentation/ide.txt help file. However I have not been able to get the
> kernel to recognize my ide device.
>
> Does anybody know if I can use the generic linux ide drivers? Or will I
> need to modify/write my own driver for this type of setup?
>
Here's what I use:
http://marc.info/?l=linux-kernel&m=113877891224982&w=2
Please note that if you're using a kernel newer than 2.6.18, the _insw()
and _outsw() calls no longer exist, so you'll need to replace them.
Here's how I modified Kumar's functions. Not necessarily the right way,
but it seems to work:
/* xxx: use standard outsw, insw when byte lanes swapped */
static void cfide_outsw(unsigned long port, void *addr, u32 count)
{
u16 *tmp = addr;
while (count--)
out_le16((u16 *)port, *tmp++);
}
static void cfide_insw(unsigned long port, void *addr, u32 count)
{
u16 *tmp = addr;
while (count--)
*tmp++ = in_le16((u16 *)port);
}
regards,
Ben
next prev parent reply other threads:[~2007-10-12 19:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-12 18:29 MPC85xx and linux IDE driver Michael Brian Willis
2007-10-12 19:48 ` Ben Warren [this message]
2007-10-17 17:47 ` Michael Brian Willis
2007-10-17 18:44 ` Ben Warren
2007-10-25 21:49 ` Michael Brian Willis
2007-10-25 22:04 ` Ben Warren
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