I've been working of lot things, hopefully all theese changes can integrated painless.
Pathes are available for download at:
http://www.cucumelo.org/~gorm/cs46xx.patch (for alsa-kernel/pci/cs46xx/* changes)
http://www.cucumelo.org/~gorm/cs46xx_include.patch (for alsa-kernel/include/* changes)
The main new feuture is a new PCM channel:
- Cards with a dual CODEC configuration (2 x cs4294 || 1 x cs4297A + 1 x cs4294),
like (Hercules GTXP, Santa Cruz, Terratec SixPack 5.1):
PCM 0 - slot 3 and 4 (Primary CODEC) main channel
PCM 1 - slot 7 and 8 (Seconadry CODEC) rear channel
PCM 2 - IEC958, SPDIF output from the DSP
PCM 3 - slot 6 and 9 (Seconadry CODEC) left channel is Center and right is LFE
Theoretically it should also possible to support yet another analog output on
slot 11 and 5 on primary CODEC, to support surround 7.1, (Hercules GTXP
has done something here, but dont exaclty how stuff are wired ...)
- Cards with a single CODEC configuration (1 x cs4294), like Terratec XFire 1024:
(This configuration is untested)
PCM 0 - slot 3 and 4 (Primary CODEC) main channel
PCM 1 - slot 11 and 5 (Primary CODEC) rear channel
PCM 2 - IEC958, SPDIF output from the DSP
- Some changes to the IEC958 input, should be functional by now, but still far from
being perfect.
- There is another theoretical problem which will prevent the cs46xx work on Big Endian
architectures. I've started to work on this issue, but not finished yet.
What's left on this point is to initialize all DSP structs with the C99 style (.member = value, ...)
a lot of painful work (anyone like to help me ? -;) )
Known problems (for the moment):
- The Terratec SixPack 5.1 card wont initialize correctly on a cold/warm boot.
A reload of the ALSA driver fixes the problem.
- The IEC958 input port sometimes just stop working, the only thing that seems
to fix it is a cold boot. (a warm reboot does not seems to be enough)
- The analog output's on the SiXPack 5.1 are very distorcionated when PCM volumes
is over ~ 65 %. The only amplified output on this cards seems to be the Headphone output.
That's all for now ...
/Benny
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