[alsa-devel] Alsa Driver on Coldfire
Hi
I've been given the job of writing a sound card driver using the alsa architecture for a development platform that uses a coldfire chip.
The first thing I came across was a chunky 'if !M68K' in sound/Kconfig, which excludes all the alsa components. I can't find any reason for this in the mailing list archives or on the web in general, so I'm wondering if anybody knows why the M68K architecture is excluded?
Cheers Simon
At Fri, 18 Apr 2008 11:02:56 +0100, Simon Dunn wrote:
Hi
I've been given the job of writing a sound card driver using the alsa architecture for a development platform that uses a coldfire chip.
The first thing I came across was a chunky 'if !M68K' in sound/Kconfig, which excludes all the alsa components. I can't find any reason for this in the mailing list archives or on the web in general, so I'm wondering if anybody knows why the M68K architecture is excluded?
I don't remember exact reason, too. It was so when ALSA was merged, IIRC.
Takashi
On Fri, Apr 18, 2008 at 12:22:35PM +0200, Takashi Iwai wrote:
Simon Dunn wrote:
I've been given the job of writing a sound card driver using the alsa architecture for a development platform that uses a coldfire chip.
on the web in general, so I'm wondering if anybody knows why the M68K architecture is excluded?
I don't remember exact reason, too. It was so when ALSA was merged, IIRC.
I think I'd formed the impression from somewhere or other (probably related to Debian m68k) that it was that there were no relevant drivers for m68k that had been ported to ALSA so there wasn't much point building it. I could be misremembering, though.
With regard to ColdFire I'm guessing that this is an embedded system? If so you might want to have a look at working with the ASoC framework (see sound/soc and Documentation/sound/alsa/soc).
On Fri, 18 Apr 2008 12:23:41 +0100, Mark Brown broonie@opensource.wolfsonmicro.com wrote:
I don't remember exact reason, too. It was so when ALSA was merged, IIRC.
I think I'd formed the impression from somewhere or other (probably related to Debian m68k) that it was that there were no relevant drivers for m68k that had been ported to ALSA so there wasn't much point building it. I could be misremembering, though.
With regard to ColdFire I'm guessing that this is an embedded system? If so you might want to have a look at working with the ASoC framework (see sound/soc and Documentation/sound/alsa/soc).
Thanks for the info guys, I couldn't see any reason why alsa would be excluded. Oh and thanks for the tip re the system on chip, I'll have a look into that though the kernel version we're working with is 2.6.10 and doesn't include it 'off the shelf'.
Can't imagine it would be too difficult to merge across unless anyone knows different?
Cheers Simon
On Fri, Apr 18, 2008 at 04:47:40PM +0100, Simon Dunn wrote:
On Fri, 18 Apr 2008 12:23:41 +0100, Mark Brown
excluded. Oh and thanks for the tip re the system on chip, I'll have a look into that though the kernel version we're working with is 2.6.10 and doesn't include it 'off the shelf'.
Can't imagine it would be too difficult to merge across unless anyone knows different?
Tedious more than hard - there was a change in the ALSA APIs from using typedefs to using 'struct foo' which creates a lot of code churn but is not at all difficult to deal with. Other than that things should be pretty straightforward.
participants (3)
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Mark Brown -
Simon Dunn -
Takashi Iwai