Is there any queston when using ALSA in arm platform?

Is there any queston when using ALSA in arm platform?

[sudong]

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Hi
    I'm writing a sound driver based ALSA for Intel PXA27x + Ac97 Codec. The AC97 api in alsa is for pci bus. So I want to know whether I can use it directly, or need write it myself? Is there any queston when using ALSA in arm platform?
    Thanks!

Sudong
2004-12-3

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Re: Is there any queston when using ALSA in arm platform?

[Peter Zubaj]

Hi,

AFAIK AC97 API is not dependant on bus type. 

This is code from emu10k1 driver, it initializes ac97 struct:

ac97_template_t ac97;
static ac97_bus_ops_t ops = {
	.write = snd_emu10k1_ac97_write,
	.read = snd_emu10k1_ac97_read,
};

if ((err = snd_ac97_bus(emu->card, 0, &ops, NULL, &pbus)) < 0)
	return err;
		
memset(&ac97, 0, sizeof(ac97));
ac97.private_data = emu;
ac97.private_free = snd_emu10k1_mixer_free_ac97;
if ((err = snd_ac97_mixer(pbus, &ac97, &emu->ac97)) < 0)
	return err; 


.write = snd_emu10k1_ac97_write,
.read = snd_emu10k1_ac97_read,

These 2 functions are responsible to transfer control data to/from
ac97. You should implement it for your chip.

Peter Zubaj
____________________________________
http://www.pobox.sk/ - najvacsi slovensky freemail





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