au88x0_mixer.c

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/*
 * Vortex Mixer support.
 *
 * There is much more than just the AC97 mixer...
 *
 */

#include <linux/time.h>
#include <linux/init.h>
#include <sound/core.h>
#include "au88x0.h"

static int remove_ctl(struct snd_card *card, const char *name)
{
    struct snd_ctl_elem_id id;
    memset(&id, 0, sizeof(id));
    strcpy(id.name, name);
    id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
    return snd_ctl_remove_id(card, &id);
}

static int __devinit snd_vortex_mixer(vortex_t * vortex)
{
    struct snd_ac97_bus *pbus;
    struct snd_ac97_template ac97;
    int err;
    static struct snd_ac97_bus_ops ops = {
        .write = vortex_codec_write,
        .read = vortex_codec_read,
    };

    if ((err = snd_ac97_bus(vortex->card, 0, &ops, NULL, &pbus)) < 0)
        return err;
    memset(&ac97, 0, sizeof(ac97));
    // Initialize AC97 codec stuff.
    ac97.private_data = vortex;
    ac97.scaps = AC97_SCAP_NO_SPDIF;
    err = snd_ac97_mixer(pbus, &ac97, &vortex->codec);
    vortex->isquad = ((vortex->codec == NULL) ?  0 : (vortex->codec->ext_id&0x80));
    remove_ctl(vortex->card, "Master Mono Playback Volume");
    remove_ctl(vortex->card, "Master Mono Playback Switch");
    return err;
}