adulau/aha
1
0
Fork 0
mirror of https://github.com/adulau/aha.git synced 2024-12-28 03:36:19 +00:00
Code Issues Projects Releases Packages Wiki Activity

[ALSA] Fix volume control for the AK4358 DAC

Browse source 
Fix volume control for the AK4358 DAC.
The attenuation control registers of the AK4358 use only 7bit for the
volume, the msb is used to enable attenuation output.  Without this
patch there are 256 volume levels the lower 128 of which are mute.

Signed-off-by: Jochen Voss <voss@seehuhn.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Jochen Voss 2006-08-23 18:35:35 +02:00 committed by Jaroslav Kysela
parent 071c73ad5f
commit 3479307f8c
1 changed files with 29 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

42
sound/i2c/other/ak4xxx-adda.c
View file

@ -284,11 +284,13 @@ EXPORT_SYMBOL(snd_akm4xxx_init);
#define AK_GET_CHIP(val) (((val) >> 8) & 0xff)
#define AK_GET_ADDR(val) ((val) & 0xff)
#define AK_GET_SHIFT(val) (((val) >> 16) & 0x7f)
#define AK_GET_SHIFT(val) (((val) >> 16) & 0x3f)
#define AK_GET_NEEDSMSB(val) (((val) >> 22) & 1)
#define AK_GET_INVERT(val) (((val) >> 23) & 1)
#define AK_GET_MASK(val) (((val) >> 24) & 0xff)
#define AK_COMPOSE(chip,addr,shift,mask) \
(((chip) << 8) | (addr) | ((shift) << 16) | ((mask) << 24))
#define AK_NEEDSMSB (1<<22)
#define AK_INVERT (1<<23)
static int snd_akm4xxx_volume_info(struct snd_kcontrol *kcontrol,
@ -309,10 +311,13 @@ static int snd_akm4xxx_volume_get(struct snd_kcontrol *kcontrol,
struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
int chip = AK_GET_CHIP(kcontrol->private_value);
int addr = AK_GET_ADDR(kcontrol->private_value);
int needsmsb = AK_GET_NEEDSMSB(kcontrol->private_value);
int invert = AK_GET_INVERT(kcontrol->private_value);
unsigned int mask = AK_GET_MASK(kcontrol->private_value);
unsigned char val = snd_akm4xxx_get(ak, chip, addr);
if (needsmsb)
val &= 0x7f;
ucontrol->value.integer.value[0] = invert ? mask - val : val;
return 0;
}
@ -323,6 +328,7 @@ static int snd_akm4xxx_volume_put(struct snd_kcontrol *kcontrol,
struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
int chip = AK_GET_CHIP(kcontrol->private_value);
int addr = AK_GET_ADDR(kcontrol->private_value);
int needsmsb = AK_GET_NEEDSMSB(kcontrol->private_value);
int invert = AK_GET_INVERT(kcontrol->private_value);
unsigned int mask = AK_GET_MASK(kcontrol->private_value);
unsigned char nval = ucontrol->value.integer.value[0] % (mask+1);
@ -330,6 +336,8 @@ static int snd_akm4xxx_volume_put(struct snd_kcontrol *kcontrol,
if (invert)
nval = mask - nval;
if (needsmsb)
nval |= 0x80;
change = snd_akm4xxx_get(ak, chip, addr) != nval;
if (change)
snd_akm4xxx_write(ak, chip, addr, nval);
@ -354,13 +362,19 @@ static int snd_akm4xxx_stereo_volume_get(struct snd_kcontrol *kcontrol,
struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
int chip = AK_GET_CHIP(kcontrol->private_value);
int addr = AK_GET_ADDR(kcontrol->private_value);
int needsmsb = AK_GET_NEEDSMSB(kcontrol->private_value);
int invert = AK_GET_INVERT(kcontrol->private_value);
unsigned int mask = AK_GET_MASK(kcontrol->private_value);
unsigned char val = snd_akm4xxx_get(ak, chip, addr);
unsigned char val;
val = snd_akm4xxx_get(ak, chip, addr);
if (needsmsb)
val &= 0x7f;
ucontrol->value.integer.value[0] = invert ? mask - val : val;
val = snd_akm4xxx_get(ak, chip, addr+1);
if (needsmsb)
val &= 0x7f;
ucontrol->value.integer.value[1] = invert ? mask - val : val;
return 0;
@ -372,6 +386,7 @@ static int snd_akm4xxx_stereo_volume_put(struct snd_kcontrol *kcontrol,
struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
int chip = AK_GET_CHIP(kcontrol->private_value);
int addr = AK_GET_ADDR(kcontrol->private_value);
int needsmsb = AK_GET_NEEDSMSB(kcontrol->private_value);
int invert = AK_GET_INVERT(kcontrol->private_value);
unsigned int mask = AK_GET_MASK(kcontrol->private_value);
unsigned char nval = ucontrol->value.integer.value[0] % (mask+1);
@ -379,6 +394,8 @@ static int snd_akm4xxx_stereo_volume_put(struct snd_kcontrol *kcontrol,
if (invert)
nval = mask - nval;
if (needsmsb)
nval |= 0x80;
change0 = snd_akm4xxx_get(ak, chip, addr) != nval;
if (change0)
snd_akm4xxx_write(ak, chip, addr, nval);
@ -386,6 +403,8 @@ static int snd_akm4xxx_stereo_volume_put(struct snd_kcontrol *kcontrol,
nval = ucontrol->value.integer.value[1] % (mask+1);
if (invert)
nval = mask - nval;
if (needsmsb)
nval |= 0x80;
change1 = snd_akm4xxx_get(ak, chip, addr+1) != nval;
if (change1)
snd_akm4xxx_write(ak, chip, addr+1, nval);
@ -585,16 +604,13 @@ int snd_akm4xxx_build_controls(struct snd_akm4xxx *ak)
/* register 4-9, chip #0 only */
ctl->private_value = AK_COMPOSE(0, idx + 4, 0, 255);
break;
case SND_AK4358:
if (idx >= 6)
/* register 4-9, chip #0 only */
ctl->private_value =
AK_COMPOSE(0, idx + 5, 0, 255);
else
/* register 4-9, chip #0 only */
ctl->private_value =
AK_COMPOSE(0, idx + 4, 0, 255);
case SND_AK4358: {
/* register 4-9 and 11-12, chip #0 only */
int addr = idx < 6 ? idx + 4 : idx + 5;
ctl->private_value =
AK_COMPOSE(0, addr, 0, 127) | AK_NEEDSMSB;
break;
}
case SND_AK4381:
/* register 3 & 4 */
ctl->private_value =