mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-22 08:50:50 +02:00
111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
|
#include <sound/driver.h>
|
||
|
|
#include <sound/core.h>
|
||
|
|
#include <sound/info.h>
|
||
|
|
#include <sound/control.h>
|
||
|
|
#include <sound/ac97_codec.h>
|
||
|
|
|
||
|
|
#include <asm/olpc.h>
|
||
|
|
#include "cs5535audio.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* OLPC has an additional feature on top of the regular AD1888 codec features.
|
||
|
|
* It has an Analog Input mode that is switched into (after disabling the
|
||
|
|
* High Pass Filter) via GPIO. It is only supported on B2 and later models.
|
||
|
|
*/
|
||
|
|
|
||
|
|
int olpc_ai_enable(struct snd_ac97 *ac97, u8 val)
|
||
|
|
{
|
||
|
|
int err;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* update the High Pass Filter (via AC97_AD_TEST2), and then set
|
||
|
|
* Analog Input mode through a GPIO.
|
||
|
|
*/
|
||
|
|
|
||
|
|
if (val) {
|
||
|
|
err = snd_ac97_update_bits(ac97, AC97_AD_TEST2,
|
||
|
|
1<<AC97_AD_HPFD_SHIFT, 1<<AC97_AD_HPFD_SHIFT);
|
||
|
|
geode_gpio_set(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
err = snd_ac97_update_bits(ac97, AC97_AD_TEST2,
|
||
|
|
1<<AC97_AD_HPFD_SHIFT, 0);
|
||
|
|
geode_gpio_clear(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL);
|
||
|
|
}
|
||
|
|
if (err < 0)
|
||
|
|
snd_printk(KERN_ERR "Error updating AD_TEST2: %d\n", err);
|
||
|
|
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(olpc_ai_enable);
|
||
|
|
|
||
|
|
static int snd_cs5535audio_ai_info(struct snd_kcontrol *kcontrol,
|
||
|
|
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 snd_cs5535audio_ai_get(struct snd_kcontrol *kcontrol,
|
||
|
|
struct snd_ctl_elem_value *ucontrol)
|
||
|
|
{
|
||
|
|
ucontrol->value.integer.value[0] = geode_gpio_isset(OLPC_GPIO_MIC_AC,
|
||
|
|
GPIO_OUTPUT_VAL);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int snd_cs5535audio_ai_put(struct snd_kcontrol *kcontrol,
|
||
|
|
struct snd_ctl_elem_value *ucontrol)
|
||
|
|
{
|
||
|
|
struct cs5535audio *cs5535au = snd_kcontrol_chip(kcontrol);
|
||
|
|
struct snd_ac97 *ac97 = cs5535au->ac97;
|
||
|
|
|
||
|
|
olpc_ai_enable(ac97, ucontrol->value.integer.value[0]);
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct snd_kcontrol_new snd_cs5535audio_controls __devinitdata =
|
||
|
|
{
|
||
|
|
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
|
||
|
|
.name = "DC Mode Enable",
|
||
|
|
.info = snd_cs5535audio_ai_info,
|
||
|
|
.get = snd_cs5535audio_ai_get,
|
||
|
|
.put = snd_cs5535audio_ai_put,
|
||
|
|
.private_value = 0
|
||
|
|
};
|
||
|
|
|
||
|
|
void __devinit olpc_prequirks(struct snd_card *card,
|
||
|
|
struct snd_ac97_template *ac97)
|
||
|
|
{
|
||
|
|
/* Bail if this isn't an OLPC platform */
|
||
|
|
if (!machine_is_olpc())
|
||
|
|
return;
|
||
|
|
|
||
|
|
/* If on an OLPC B3 or higher, invert EAPD. */
|
||
|
|
if (olpc_rev_after(OLPC_REV_B2))
|
||
|
|
ac97->scaps |= AC97_SCAP_INV_EAPD;
|
||
|
|
}
|
||
|
|
|
||
|
|
int __devinit olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97)
|
||
|
|
{
|
||
|
|
struct snd_ctl_elem_id elem;
|
||
|
|
|
||
|
|
/* Bail if this isn't an OLPC platform */
|
||
|
|
if (!machine_is_olpc())
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
/* drop the original ad1888 HPF control */
|
||
|
|
memset(&elem, 0, sizeof(elem));
|
||
|
|
elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
|
||
|
|
strcpy(elem.name, "High Pass Filter Enable");
|
||
|
|
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));
|
||
|
|
}
|