sound/pci/au88x0/au88x0_mixer.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Vortex Mixer support.
   4  *
   5  * There is much more than just the AC97 mixer...
   6  *
   7  */
   8
   9 #include <linux/time.h>
  10 #include <linux/init.h>
  11 #include <sound/core.h>
  12 #include "au88x0.h"
  13
  14 static int remove_ctl(struct snd_card *card, const char *name)
  15 {
  16         struct snd_ctl_elem_id id;
  17         memset(&id, 0, sizeof(id));
  18         strcpy(id.name, name);
  19         id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
  20         return snd_ctl_remove_id(card, &id);
  21 }
  22
  23 static int snd_vortex_mixer(vortex_t *vortex)
  24 {
  25         struct snd_ac97_bus *pbus;
  26         struct snd_ac97_template ac97;
  27         int err;
  28         static struct snd_ac97_bus_ops ops = {
  29                 .write = vortex_codec_write,
  30                 .read = vortex_codec_read,
  31         };
  32
  33         if ((err = snd_ac97_bus(vortex->card, 0, &ops, NULL, &pbus)) < 0)
  34                 return err;
  35         memset(&ac97, 0, sizeof(ac97));
  36         // Initialize AC97 codec stuff.
  37         ac97.private_data = vortex;
  38         ac97.scaps = AC97_SCAP_NO_SPDIF;
  39         err = snd_ac97_mixer(pbus, &ac97, &vortex->codec);
  40         vortex->isquad = ((vortex->codec == NULL) ?  0 : (vortex->codec->ext_id&0x80));
  41         remove_ctl(vortex->card, "Master Mono Playback Volume");
  42         remove_ctl(vortex->card, "Master Mono Playback Switch");
  43         return err;
  44 }