+static int snd_dummy_iobox_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *info)
+{
+ const char *const names[] = { "None", "CD Player" };
+
+ return snd_ctl_enum_info(info, 1, 2, names);
+}
+
+static int snd_dummy_iobox_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *value)
+{
+ struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
+
+ value->value.enumerated.item[0] = dummy->iobox;
+ return 0;
+}
+
+static int snd_dummy_iobox_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *value)
+{
+ struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
+ int changed;
+
+ if (value->value.enumerated.item[0] > 1)
+ return -EINVAL;
+
+ changed = value->value.enumerated.item[0] != dummy->iobox;
+ if (changed) {
+ dummy->iobox = value->value.enumerated.item[0];
+
+ if (dummy->iobox) {
+ dummy->cd_volume_ctl->vd[0].access &=
+ ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
+ dummy->cd_switch_ctl->vd[0].access &=
+ ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
+ } else {
+ dummy->cd_volume_ctl->vd[0].access |=
+ SNDRV_CTL_ELEM_ACCESS_INACTIVE;
+ dummy->cd_switch_ctl->vd[0].access |=
+ SNDRV_CTL_ELEM_ACCESS_INACTIVE;
+ }
+
+ snd_ctl_notify(dummy->card, SNDRV_CTL_EVENT_MASK_INFO,
+ &dummy->cd_volume_ctl->id);
+ snd_ctl_notify(dummy->card, SNDRV_CTL_EVENT_MASK_INFO,
+ &dummy->cd_switch_ctl->id);
+ }
+
+ return changed;
+}
+