[ALSA] Add TLV support to AC97 codec driver

Added the TLV support to AC97 codec driver for addition of
dB range information.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/pci/ac97/ac97_codec.c

@@ -31,6 +31,7 @@
 #include <linux/mutex.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
+#include <sound/tlv.h>
 #include <sound/ac97_codec.h>
 #include <sound/asoundef.h>
 #include <sound/initval.h>
@@ -1181,6 +1182,32 @@ static int snd_ac97_cmute_new_stereo(struct snd_card *card, char *name, int reg,
 	return 0;
 }
 
+/*
+ * set dB information
+ */
+static DECLARE_TLV_DB_SCALE(db_scale_4bit, -4500, 300, 0);
+static DECLARE_TLV_DB_SCALE(db_scale_5bit, -4650, 150, 0);
+static DECLARE_TLV_DB_SCALE(db_scale_6bit, -9450, 150, 0);
+static DECLARE_TLV_DB_SCALE(db_scale_5bit_12db_max, -3450, 150, 0);
+static DECLARE_TLV_DB_SCALE(db_scale_rec_gain, 0, 150, 0);
+
+static unsigned int *find_db_scale(unsigned int maxval)
+{
+	switch (maxval) {
+	case 0x0f: return db_scale_4bit;
+	case 0x1f: return db_scale_5bit;
+	case 0x3f: return db_scale_6bit;
+	}
+	return NULL;
+}
+
+static void set_tlv_db_scale(struct snd_kcontrol *kctl, unsigned int *tlv)
+{	
+	kctl->tlv.p = tlv;
+	if (tlv)
+		kctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
+}
+
 /*
  * create a volume for normal stereo/mono controls
  */
@@ -1203,6 +1230,10 @@ static int snd_ac97_cvol_new(struct snd_card *card, char *name, int reg, unsigne
 		tmp.index = ac97->num;
 		kctl = snd_ctl_new1(&tmp, ac97);
 	}
+	if (reg >= AC97_PHONE && reg <= AC97_PCM)
+		set_tlv_db_scale(kctl, db_scale_5bit_12db_max);
+	else
+		set_tlv_db_scale(kctl, find_db_scale(lo_max));
 	err = snd_ctl_add(card, kctl);
 	if (err < 0)
 		return err;
@@ -1282,6 +1313,7 @@ static int snd_ac97_mixer_build(struct snd_ac97 * ac97)
 		snd_ac97_change_volume_params2(ac97, AC97_CENTER_LFE_MASTER, 0, &max);
 		kctl->private_value &= ~(0xff << 16);
 		kctl->private_value |= (int)max << 16;
+		set_tlv_db_scale(kctl, find_db_scale(max));
 		snd_ac97_write_cache(ac97, AC97_CENTER_LFE_MASTER, ac97->regs[AC97_CENTER_LFE_MASTER] | max);
 	}
 
@@ -1295,6 +1327,7 @@ static int snd_ac97_mixer_build(struct snd_ac97 * ac97)
 		snd_ac97_change_volume_params2(ac97, AC97_CENTER_LFE_MASTER, 8, &max);
 		kctl->private_value &= ~(0xff << 16);
 		kctl->private_value |= (int)max << 16;
+		set_tlv_db_scale(kctl, find_db_scale(max));
 		snd_ac97_write_cache(ac97, AC97_CENTER_LFE_MASTER, ac97->regs[AC97_CENTER_LFE_MASTER] | max << 8);
 	}
 
@@ -1342,8 +1375,9 @@ static int snd_ac97_mixer_build(struct snd_ac97 * ac97)
 		((ac97->flags & AC97_HAS_PC_BEEP) ||
 	    snd_ac97_try_volume_mix(ac97, AC97_PC_BEEP))) {
 		for (idx = 0; idx < 2; idx++)
-			if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_pc_beep[idx], ac97))) < 0)
+			if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_pc_beep[idx], ac97))) < 0)
 				return err;
+		set_tlv_db_scale(kctl, db_scale_4bit);
 		snd_ac97_write_cache(ac97, AC97_PC_BEEP,
 				     snd_ac97_read(ac97, AC97_PC_BEEP) | 0x801e);
 	}
@@ -1410,22 +1444,26 @@ static int snd_ac97_mixer_build(struct snd_ac97 * ac97)
 		else
 			init_val = 0x9f1f;
 		for (idx = 0; idx < 2; idx++)
-			if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_ad18xx_pcm[idx], ac97))) < 0)
+			if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_ad18xx_pcm[idx], ac97))) < 0)
 				return err;
+		set_tlv_db_scale(kctl, db_scale_5bit);
 		ac97->spec.ad18xx.pcmreg[0] = init_val;
 		if (ac97->scaps & AC97_SCAP_SURROUND_DAC) {
 			for (idx = 0; idx < 2; idx++)
-				if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_ad18xx_surround[idx], ac97))) < 0)
+				if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_ad18xx_surround[idx], ac97))) < 0)
 					return err;
+			set_tlv_db_scale(kctl, db_scale_5bit);
 			ac97->spec.ad18xx.pcmreg[1] = init_val;
 		}
 		if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC) {
 			for (idx = 0; idx < 2; idx++)
-				if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_ad18xx_center[idx], ac97))) < 0)
+				if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_ad18xx_center[idx], ac97))) < 0)
 					return err;
+			set_tlv_db_scale(kctl, db_scale_5bit);
 			for (idx = 0; idx < 2; idx++)
-				if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_ad18xx_lfe[idx], ac97))) < 0)
+				if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_ad18xx_lfe[idx], ac97))) < 0)
 					return err;
+			set_tlv_db_scale(kctl, db_scale_5bit);
 			ac97->spec.ad18xx.pcmreg[2] = init_val;
 		}
 		snd_ac97_write_cache(ac97, AC97_PCM, init_val);
@@ -1453,16 +1491,18 @@ static int snd_ac97_mixer_build(struct snd_ac97 * ac97)
 			if (err < 0)
 				return err;
 		}
-		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_control_capture_vol, ac97))) < 0)
+		if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_control_capture_vol, ac97))) < 0)
 			return err;
+		set_tlv_db_scale(kctl, db_scale_rec_gain);
 		snd_ac97_write_cache(ac97, AC97_REC_SEL, 0x0000);
 		snd_ac97_write_cache(ac97, AC97_REC_GAIN, 0x0000);
 	}
 	/* build MIC Capture controls */
 	if (snd_ac97_try_volume_mix(ac97, AC97_REC_GAIN_MIC)) {
 		for (idx = 0; idx < 2; idx++)
-			if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_mic_capture[idx], ac97))) < 0)
+			if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_mic_capture[idx], ac97))) < 0)
 				return err;
+		set_tlv_db_scale(kctl, db_scale_rec_gain);
 		snd_ac97_write_cache(ac97, AC97_REC_GAIN_MIC, 0x0000);
 	}
 

sound/pci/ac97/ac97_patch.c

@@ -32,6 +32,7 @@
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/control.h>
+#include <sound/tlv.h>
 #include <sound/ac97_codec.h>
 #include "ac97_patch.h"
 #include "ac97_id.h"
@@ -51,6 +52,20 @@ static int patch_build_controls(struct snd_ac97 * ac97, const struct snd_kcontro
 	return 0;
 }
 
+/* replace with a new TLV */
+static void reset_tlv(struct snd_ac97 *ac97, const char *name,
+		      unsigned int *tlv)
+{
+	struct snd_ctl_elem_id sid;
+	struct snd_kcontrol *kctl;
+	memset(&sid, 0, sizeof(sid));
+	strcpy(sid.name, name);
+	sid.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+	kctl = snd_ctl_find_id(ac97->bus->card, &sid);
+	if (kctl && kctl->tlv.p)
+		kctl->tlv.p = tlv;
+}
+
 /* set to the page, update bits and restore the page */
 static int ac97_update_bits_page(struct snd_ac97 *ac97, unsigned short reg, unsigned short mask, unsigned short value, unsigned short page)
 {
@@ -1522,12 +1537,16 @@ static const struct snd_kcontrol_new snd_ac97_controls_ad1885[] = {
 	AC97_SINGLE("Line Jack Sense", AC97_AD_JACK_SPDIF, 8, 1, 1), /* inverted */
 };
 
+static DECLARE_TLV_DB_SCALE(db_scale_6bit_6db_max, -8850, 150, 0);
+
 static int patch_ad1885_specific(struct snd_ac97 * ac97)
 {
 	int err;
 
 	if ((err = patch_build_controls(ac97, snd_ac97_controls_ad1885, ARRAY_SIZE(snd_ac97_controls_ad1885))) < 0)
 		return err;
+	reset_tlv(ac97, "Headphone Playback Volume",
+		  db_scale_6bit_6db_max);
 	return 0;
 }
 
@@ -1551,12 +1570,27 @@ int patch_ad1885(struct snd_ac97 * ac97)
 	return 0;
 }
 
+static int patch_ad1886_specific(struct snd_ac97 * ac97)
+{
+	reset_tlv(ac97, "Headphone Playback Volume",
+		  db_scale_6bit_6db_max);
+	return 0;
+}
+
+static struct snd_ac97_build_ops patch_ad1886_build_ops = {
+	.build_specific = &patch_ad1886_specific,
+#ifdef CONFIG_PM
+	.resume = ad18xx_resume
+#endif
+};
+
 int patch_ad1886(struct snd_ac97 * ac97)
 {
 	patch_ad1881(ac97);
 	/* Presario700 workaround */
 	/* for Jack Sense/SPDIF Register misetting causing */
 	snd_ac97_write_cache(ac97, AC97_AD_JACK_SPDIF, 0x0010);
+	ac97->build_ops = &patch_ad1886_build_ops;
 	return 0;
 }
 
@@ -2015,6 +2049,8 @@ static const struct snd_kcontrol_new snd_ac97_spdif_controls_alc650[] = {
 	/* AC97_SINGLE("IEC958 Input Monitor", AC97_ALC650_MULTICH, 13, 1, 0), */
 };
 
+static DECLARE_TLV_DB_SCALE(db_scale_5bit_3db_max, -4350, 150, 0);
+
 static int patch_alc650_specific(struct snd_ac97 * ac97)
 {
 	int err;
@@ -2025,6 +2061,9 @@ static int patch_alc650_specific(struct snd_ac97 * ac97)
 		if ((err = patch_build_controls(ac97, snd_ac97_spdif_controls_alc650, ARRAY_SIZE(snd_ac97_spdif_controls_alc650))) < 0)
 			return err;
 	}
+	if (ac97->id != AC97_ID_ALC650F)
+		reset_tlv(ac97, "Master Playback Volume",
+			  db_scale_5bit_3db_max);
 	return 0;
 }