[ALSA] ac97 - Smart 5.1 for VIA 1617a codec

This patch provides a single 8 way enum called 'Smart 5.1 Select' with
some reasonable names for each enum that allows the user to choose
which of the 8 possible settings for vt1617a's version of what via
calls 'Smart 5.1'.

Signed-off-by: John Utz <john.utz@dmx.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 99 insertions, 4 deletions

diff --git a/sound/pci/ac97/ac97_patch.c b/sound/pci/ac97/ac97_patch.c
index 43455fc07b7..3eac0f86266 100644
--- a/sound/pci/ac97/ac97_patch.c
+++ b/sound/pci/ac97/ac97_patch.c
@@ -3277,16 +3277,111 @@ static int patch_vt1616(struct snd_ac97 * ac97)
 /*
  * VT1617A codec
  */
-static int patch_vt1617a(struct snd_ac97 * ac97)
+
+/*
+ * unfortunately, the vt1617a stashes the twiddlers required for
+ * nooding the i/o jacks on 2 different regs. * thameans that we cant
+ * use the easy way provided by AC97_ENUM_DOUBLE() we have to write
+ * are own funcs.
+ *
+ * NB: this is absolutely and utterly different from the vt1618. dunno
+ * about the 1616.
+ */
+
+/* copied from ac97_surround_jack_mode_info() */
+static int snd_ac97_vt1617a_smart51_info(struct snd_kcontrol *kcontrol,
+                                         struct snd_ctl_elem_info *uinfo)
 {
-        /* bring analog power consumption to normal, like WinXP driver
-         * for EPIA SP
+        /* ordering in this list reflects vt1617a docs for Reg 20 and
+         * 7a and Table 6 that lays out the matrix NB WRT Table6: SM51
+         * is SM51EN *AND* it's Bit14, not Bit15 so the table is very
+         * counter-intuitive */ 
+
+        static const char* texts[] = { "LineIn Mic1", "LineIn Mic1 Mic3",
+                                       "Surr LFE/C Mic3", "LineIn LFE/C Mic3",
+                                       "LineIn Mic2", "LineIn Mic2 Mic1",
+                                       "Surr LFE Mic1", "Surr LFE Mic1 Mic2"};
+        return ac97_enum_text_info(kcontrol, uinfo, texts, 8);
+}
+
+static int snd_ac97_vt1617a_smart51_get(struct snd_kcontrol *kcontrol,
+                                        struct snd_ctl_elem_value *ucontrol)
+{
+        ushort usSM51, usMS;  
+
+        struct snd_ac97 *pac97;
+        
+        pac97 = snd_kcontrol_chip(kcontrol); /* grab codec handle */
+
+        /* grab our desirec bits, then mash them together in a manner
+         * consistent with Table 6 on page 17 in the 1617a docs */
+ 
+        usSM51 = snd_ac97_read(pac97, 0x7a) >> 14;
+        usMS   = snd_ac97_read(pac97, 0x20) >> 8;
+  
+        ucontrol->value.enumerated.item[0] = (usSM51 << 1) + usMS;
+
+        return 0;
+}
+
+static int snd_ac97_vt1617a_smart51_put(struct snd_kcontrol *kcontrol,
+                                        struct snd_ctl_elem_value *ucontrol)
+{
+        ushort usSM51, usMS, usReg;  
+
+        struct snd_ac97 *pac97;
+
+        pac97 = snd_kcontrol_chip(kcontrol); /* grab codec handle */
+
+        usSM51 = ucontrol->value.enumerated.item[0] >> 1;
+        usMS   = ucontrol->value.enumerated.item[0] &  1;
+
+        /* push our values into the register - consider that things will be left
+         * in a funky state if the write fails */
+
+        usReg = snd_ac97_read(pac97, 0x7a);
+        snd_ac97_write_cache(pac97, 0x7a, (usReg & 0x3FFF) + (usSM51 << 14));
+        usReg = snd_ac97_read(pac97, 0x20);
+        snd_ac97_write_cache(pac97, 0x20, (usReg & 0xFEFF) + (usMS   <<  8));
+
+        return 0;
+}
+
+static const struct snd_kcontrol_new snd_ac97_controls_vt1617a[] = {
+
+        AC97_SINGLE("Center/LFE Exchange", 0x5a, 8, 1, 0),
+        /*
+         * These are used to enable/disable surround sound on motherboards
+         * that have 3 bidirectional analog jacks
+         */
+        {
+                .iface         = SNDRV_CTL_ELEM_IFACE_MIXER,
+                .name          = "Smart 5.1 Select",
+                .info          = snd_ac97_vt1617a_smart51_info,
+                .get           = snd_ac97_vt1617a_smart51_get,
+                .put           = snd_ac97_vt1617a_smart51_put,
+        },
+};
+
+int patch_vt1617a(struct snd_ac97 * ac97)
+{
+        int err = 0;
+
+        /* we choose to not fail out at this point, but we tell the
+           caller when we return */
+
+        err = patch_build_controls(ac97, &snd_ac97_controls_vt1617a[0],
+                                   ARRAY_SIZE(snd_ac97_controls_vt1617a));
+
+        /* bring analog power consumption to normal by turning off the
+         * headphone amplifier, like WinXP driver for EPIA SP
          */
         snd_ac97_write_cache(ac97, 0x5c, 0x20);
         ac97->ext_id |= AC97_EI_SPDIF;  /* force the detection of spdif */
         ac97->rates[AC97_RATES_SPDIF] = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000;
         ac97->build_ops = &patch_vt1616_ops;
-        return 0;
+
+        return err;
 }
 
 /*