[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>

1 files changed, 47 insertions, 7 deletions

diff --git a/sound/pci/ac97/ac97_codec.c b/sound/pci/ac97/ac97_codec.c
index e5d062d640df..c47f43dbd664 100644
--- a/sound/pci/ac97/ac97_codec.c
+++ b/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>
@@ -1182,6 +1183,32 @@ static int snd_ac97_cmute_new_stereo(struct snd_card *card, char *name, int reg,
 }
 
 /*
+ * 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
  */
 static int snd_ac97_cvol_new(struct snd_card *card, char *name, int reg, unsigned int lo_max,
@@ -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);
         }