[ALSA] ca0106 - Add master volume controls

Added master volume and switch controls for ca0106 using vmaster.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

2 files changed, 52 insertions, 0 deletions

diff --git a/sound/pci/Kconfig b/sound/pci/Kconfig
index 48296d97bf33..b05435cfee1e 100644
--- a/sound/pci/Kconfig
+++ b/sound/pci/Kconfig
@@ -162,6 +162,7 @@ config SND_CA0106
         depends on SND
         select SND_AC97_CODEC
         select SND_RAWMIDI
+        select SND_VMASTER
         help
           Say Y here to include support for the Sound Blaster Audigy LS
           and Live 24bit.
diff --git a/sound/pci/ca0106/ca0106_mixer.c b/sound/pci/ca0106/ca0106_mixer.c
index af736869d9b1..94618ecaab65 100644
--- a/sound/pci/ca0106/ca0106_mixer.c
+++ b/sound/pci/ca0106/ca0106_mixer.c
@@ -658,11 +658,47 @@ static int __devinit rename_ctl(struct snd_card *card, const char *src, const ch
                 }                                                       \
         } while (0)
 
+static __devinitdata
+DECLARE_TLV_DB_SCALE(snd_ca0106_master_db_scale, -6375, 50, 1);
+
+static char *slave_vols[] __devinitdata = {
+        "Analog Front Playback Volume",
+        "Analog Rear Playback Volume",
+        "Analog Center/LFE Playback Volume",
+        "Analog Side Playback Volume",
+        "IEC958 Front Playback Volume",
+        "IEC958 Rear Playback Volume",
+        "IEC958 Center/LFE Playback Volume",
+        "IEC958 Unknown Playback Volume",
+        "CAPTURE feedback Playback Volume",
+        NULL
+};
+
+static char *slave_sws[] __devinitdata = {
+        "Analog Front Playback Switch",
+        "Analog Rear Playback Switch",
+        "Analog Center/LFE Playback Switch",
+        "Analog Side Playback Switch",
+        "IEC958 Playback Switch",
+        NULL
+};
+
+static void __devinit add_slaves(struct snd_card *card,
+                                 struct snd_kcontrol *master, char **list)
+{
+        for (; *list; list++) {
+                struct snd_kcontrol *slave = ctl_find(card, *list);
+                if (slave)
+                        snd_ctl_add_slave(master, slave);
+        }
+}
+
 int __devinit snd_ca0106_mixer(struct snd_ca0106 *emu)
 {
         int err;
         struct snd_card *card = emu->card;
         char **c;
+        struct snd_kcontrol *vmaster;
         static char *ca0106_remove_ctls[] = {
                 "Master Mono Playback Switch",
                 "Master Mono Playback Volume",
@@ -719,6 +755,21 @@ int __devinit snd_ca0106_mixer(struct snd_ca0106 *emu)
         }
         if (emu->details->spi_dac == 1)
                 ADD_CTLS(emu, snd_ca0106_volume_spi_dac_ctls);
+
+        /* Create virtual master controls */
+        vmaster = snd_ctl_make_virtual_master("Master Playback Volume",
+                                              snd_ca0106_master_db_scale);
+        if (!vmaster)
+                return -ENOMEM;
+        add_slaves(card, vmaster, slave_vols);
+
+        if (emu->details->spi_dac == 1) {
+                vmaster = snd_ctl_make_virtual_master("Master Playback Switch",
+                                                      NULL);
+                if (!vmaster)
+                        return -ENOMEM;
+                add_slaves(card, vmaster, slave_sws);
+        }
         return 0;
 }