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#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));
}
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