sound/pci/au88x0/au88x0_mixer.c

   1 /*
   2  * Vortex Mixer support.
   3  *
   4  * There is much more than just the AC97 mixer...
   5  *
   6  */
   7
   8 #include <linux/time.h>
   9 #include <linux/init.h>
  10 #include <sound/core.h>
  11 #include "au88x0.h"
  12
  13 static int remove_ctl(struct snd_card *card, const char *name)
  14 {
  15         struct snd_ctl_elem_id id;
  16         memset(&id, 0, sizeof(id));
  17         strcpy(id.name, name);
  18         id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
  19         return snd_ctl_remove_id(card, &id);
  20 }
  21
  22 static int snd_vortex_mixer(vortex_t *vortex)
  23 {
  24         struct snd_ac97_bus *pbus;
  25         struct snd_ac97_template ac97;
  26         int err;
  27         static struct snd_ac97_bus_ops ops = {
  28                 .write = vortex_codec_write,
  29                 .read = vortex_codec_read,
  30         };
  31
  32         if ((err = snd_ac97_bus(vortex->card, 0, &ops, NULL, &pbus)) < 0)
  33                 return err;
  34         memset(&ac97, 0, sizeof(ac97));
  35         // Initialize AC97 codec stuff.
  36         ac97.private_data = vortex;
  37         ac97.scaps = AC97_SCAP_NO_SPDIF;
  38         err = snd_ac97_mixer(pbus, &ac97, &vortex->codec);
  39         vortex->isquad = ((vortex->codec == NULL) ?  0 : (vortex->codec->ext_id&0x80));
  40         remove_ctl(vortex->card, "Master Mono Playback Volume");
  41         remove_ctl(vortex->card, "Master Mono Playback Switch");
  42         return err;
  43 }