openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

ALSA: cs5535audio: rename V_REFOUT control to MIC Bias 

This drops the AD1888 V_REFOUT control, and replaces it with a MIC Bias
Enable control.  It also moves the MIC bias enabling into a separate
function.

Signed-off-by: Andres Salomon <dilinger@debian.org>
This commit is contained in:
Andres Salomon 2008-11-06 16:53:03 -05:00 committed by Takashi Iwai
parent e463ae1d13
commit bf1e527835
3 changed files with 87 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
sound/pci/cs5535audio/cs5535audio.h
View File

@ -104,6 +104,19 @@ void __devinit olpc_prequirks(struct snd_card *card,
struct snd_ac97_template *ac97);
int __devinit olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97);
void olpc_analog_input(struct snd_ac97 *ac97, int on);
void olpc_mic_bias(struct snd_ac97 *ac97, int on);
static inline void olpc_capture_open(struct snd_ac97 *ac97)
{
/* enable MIC Bias for recording */
olpc_mic_bias(ac97, 1);
}
static inline void olpc_capture_close(struct snd_ac97 *ac97)
{
/* disable the MIC Bias (so the recording LED turns off) */
olpc_mic_bias(ac97, 0);
}
#else
static inline void olpc_prequirks(struct snd_card *card,
struct snd_ac97_template *ac97) { }
@ -112,6 +125,9 @@ static inline int olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97)
return 0;
}
static inline void olpc_analog_input(struct snd_ac97 *ac97, int on) { }
static inline void olpc_mic_bias(struct snd_ac97 *ac97, int on) { }
static inline void olpc_capture_open(struct snd_ac97 *ac97) { }
static inline void olpc_capture_close(struct snd_ac97 *ac97) { }
#endif
int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535audio);

71
sound/pci/cs5535audio/cs5535audio_olpc.c
View File

@ -31,6 +31,20 @@ void olpc_analog_input(struct snd_ac97 *ac97, int on)
geode_gpio_clear(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL);
}
/*
* OLPC XO-1's V_REFOUT is a mic bias enable.
*/
void olpc_mic_bias(struct snd_ac97 *ac97, int on)
{
int err;
on = on ? 0 : 1;
err = snd_ac97_update_bits(ac97, AC97_AD_MISC,
1 << AC97_AD_VREFD_SHIFT, on << AC97_AD_VREFD_SHIFT);
if (err < 0)
snd_printk(KERN_ERR "setting MIC Bias - %d\n", err);
}
static int olpc_dc_info(struct snd_kcontrol *kctl,
struct snd_ctl_elem_info *uinfo)
{
@ -56,7 +70,36 @@ static int olpc_dc_put(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
return 1;
}
static struct snd_kcontrol_new snd_cs5535audio_controls __devinitdata =
static int olpc_mic_info(struct snd_kcontrol *kctl,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = 1;
return 0;
}
static int olpc_mic_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
{
struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
struct snd_ac97 *ac97 = cs5535au->ac97;
int i;
i = (snd_ac97_read(ac97, AC97_AD_MISC) >> AC97_AD_VREFD_SHIFT) & 0x1;
v->value.integer.value[0] = i ? 0 : 1;
return 0;
}
static int olpc_mic_put(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
{
struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
olpc_mic_bias(cs5535au->ac97, v->value.integer.value[0]);
return 1;
}
static struct snd_kcontrol_new olpc_cs5535audio_ctls[] __devinitdata = {
{
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "DC Mode Enable",
@ -64,6 +107,15 @@ static struct snd_kcontrol_new snd_cs5535audio_controls __devinitdata =
.get = olpc_dc_get,
.put = olpc_dc_put,
.private_value = 0
},
{
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "MIC Bias Enable",
.info = olpc_mic_info,
.get = olpc_mic_get,
.put = olpc_mic_put,
.private_value = 0,
},
};
void __devinit olpc_prequirks(struct snd_card *card,
@ -80,6 +132,7 @@ void __devinit olpc_prequirks(struct snd_card *card,
int __devinit olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97)
{
struct snd_ctl_elem_id elem;
int i, err;
if (!machine_is_olpc())
return 0;
@ -90,8 +143,20 @@ int __devinit olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97)
strncpy(elem.name, "High Pass Filter Enable", sizeof(elem.name));
snd_ctl_remove_id(card, &elem);
/* add the override for OLPC's HPF */
return snd_ctl_add(card, snd_ctl_new1(&snd_cs5535audio_controls,
/* drop the original V_REFOUT control */
memset(&elem, 0, sizeof(elem));
elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
strncpy(elem.name, "V_REFOUT Enable", sizeof(elem.name));
snd_ctl_remove_id(card, &elem);
/* add the OLPC-specific controls */
for (i = 0; i < ARRAY_SIZE(olpc_cs5535audio_ctls); i++) {
err = snd_ctl_add(card, snd_ctl_new1(&olpc_cs5535audio_ctls[i],
ac97->private_data));
if (err < 0)
return err;
}
return 0;
}

17
sound/pci/cs5535audio/cs5535audio_pcm.c
View File

@ -363,27 +363,14 @@ static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
if ((err = snd_pcm_hw_constraint_integer(runtime,
SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
return err;
#ifdef CONFIG_OLPC
/* Enable the V_ref bias only while recording. */
err = snd_ac97_update_bits(cs5535au->ac97, AC97_AD_MISC,
1 << AC97_AD_VREFD_SHIFT, 0);
if (err < 0)
snd_printk(KERN_ERR "Error updating AD_MISC %d\n", err);
#endif
olpc_capture_open(cs5535au->ac97);
return 0;
}
static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
{
int err;
struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
#ifdef CONFIG_OLPC
/* Disable V_ref bias. */
err = snd_ac97_update_bits(cs5535au->ac97, AC97_AD_MISC,
1 << AC97_AD_VREFD_SHIFT, 1 << AC97_AD_VREFD_SHIFT);
#endif
olpc_capture_close(cs5535au->ac97);
return 0;
}