diff options
Diffstat (limited to 'sound/pci/cs5535audio/cs5535audio_olpc.c')
| -rw-r--r-- | sound/pci/cs5535audio/cs5535audio_olpc.c | 73 |
1 files changed, 69 insertions, 4 deletions
diff --git a/sound/pci/cs5535audio/cs5535audio_olpc.c b/sound/pci/cs5535audio/cs5535audio_olpc.c index 7f26cfbc8f5..73811e0e8ac 100644 --- a/sound/pci/cs5535audio/cs5535audio_olpc.c +++ b/sound/pci/cs5535audio/cs5535audio_olpc.c @@ -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, - ac97->private_data)); + /* 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; } |