[ALSA] add codec-specific controls for UCB1400

This patch adds some codec-specific controls for Philips UCB1400 codec.
Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/pci/ac97/ac97_codec.c

@@ -156,7 +156,7 @@ static const struct ac97_codec_id snd_ac97_codec_ids[] = {
 { 0x4e534300, 0xffffffff, "LM4540,43,45,46,48",	NULL,		NULL }, // only guess --jk
 { 0x4e534331, 0xffffffff, "LM4549",		NULL,		NULL },
 { 0x4e534350, 0xffffffff, "LM4550",		patch_lm4550,  	NULL }, // volume wrap fix 
-{ 0x50534304, 0xffffffff, "UCB1400",		NULL,		NULL },
+{ 0x50534304, 0xffffffff, "UCB1400",		patch_ucb1400,	NULL },
 { 0x53494c20, 0xffffffe0, "Si3036,8",		mpatch_si3036,	mpatch_si3036, AC97_MODEM_PATCH },
 { 0x54524102, 0xffffffff, "TR28022",		NULL,		NULL },
 { 0x54524106, 0xffffffff, "TR28026",		NULL,		NULL },

sound/pci/ac97/ac97_patch.c

@@ -2872,3 +2872,41 @@ int patch_lm4550(struct snd_ac97 *ac97)
 	ac97->res_table = lm4550_restbl;
 	return 0;
 }
+
+/* 
+ *  UCB1400 codec (http://www.semiconductors.philips.com/acrobat_download/datasheets/UCB1400-02.pdf)
+ */
+static const struct snd_kcontrol_new snd_ac97_controls_ucb1400[] = {
+/* enable/disable headphone driver which allows direct connection to
+   stereo headphone without the use of external DC blocking
+   capacitors */
+AC97_SINGLE("Headphone Driver", 0x6a, 6, 1, 0),
+/* Filter used to compensate the DC offset is added in the ADC to remove idle
+   tones from the audio band. */
+AC97_SINGLE("DC Filter", 0x6a, 4, 1, 0),
+/* Control smart-low-power mode feature. Allows automatic power down
+   of unused blocks in the ADC analog front end and the PLL. */
+AC97_SINGLE("Smart Low Power Mode", 0x6c, 4, 3, 0),
+};
+
+static int patch_ucb1400_specific(struct snd_ac97 * ac97)
+{
+	int idx, err;
+	for (idx = 0; idx < ARRAY_SIZE(snd_ac97_controls_ucb1400); idx++)
+		if ((err = snd_ctl_add(ac97->bus->card, snd_ctl_new1(&snd_ac97_controls_ucb1400[idx], ac97))) < 0)
+			return err;
+	return 0;
+}
+
+static struct snd_ac97_build_ops patch_ucb1400_ops = {
+	.build_specific	= patch_ucb1400_specific,
+};
+
+int patch_ucb1400(struct snd_ac97 * ac97)
+{
+	ac97->build_ops = &patch_ucb1400_ops;
+	/* enable headphone driver and smart low power mode by default */
+	snd_ac97_write(ac97, 0x6a, 0x0050);
+	snd_ac97_write(ac97, 0x6c, 0x0030);
+	return 0;
+}

sound/pci/ac97/ac97_patch.h

@@ -58,5 +58,6 @@ int patch_cm9780(struct snd_ac97 * ac97);
 int patch_vt1616(struct snd_ac97 * ac97);
 int patch_vt1617a(struct snd_ac97 * ac97);
 int patch_it2646(struct snd_ac97 * ac97);
+int patch_ucb1400(struct snd_ac97 * ac97);
 int mpatch_si3036(struct snd_ac97 * ac97);
 int patch_lm4550(struct snd_ac97 * ac97);