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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 supported on B2 and later models.
*/
void olpc_analog_input(struct snd_ac97 *ac97, int on)
{
int err;
/* update the High Pass Filter (via AC97_AD_TEST2) */
err = snd_ac97_update_bits(ac97, AC97_AD_TEST2,
1 << AC97_AD_HPFD_SHIFT, on << AC97_AD_HPFD_SHIFT);
if (err < 0) {
snd_printk(KERN_ERR "setting High Pass Filter - %d\n", err);
return;
}
/* set Analog Input through GPIO */
if (on)
geode_gpio_set(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL);
else
geode_gpio_clear(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL);
}
static int olpc_dc_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_dc_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
{
struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
u8 val;
val = snd_ac97_read(cs5535au->ac97, AC97_AD_TEST2);
val >>= AC97_AD_HPFD_SHIFT;
v->value.integer.value[0] = val & 0x1;
return 0;
}
static int olpc_dc_put(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
{
struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
olpc_analog_input(cs5535au->ac97, v->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 = olpc_dc_info,
.get = olpc_dc_get,
.put = olpc_dc_put,
.private_value = 0
};
void __devinit olpc_prequirks(struct snd_card *card,
struct snd_ac97_template *ac97)
{
if (!machine_is_olpc())
return;
/* invert EAPD if on an OLPC B3 or higher */
if (olpc_board_at_least(olpc_board_pre(0xb3)))
ac97->scaps |= AC97_SCAP_INV_EAPD;
}
int __devinit olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97)
{
struct snd_ctl_elem_id elem;
if (!machine_is_olpc())
return 0;
/* drop the original AD1888 HPF control */
memset(&elem, 0, sizeof(elem));
elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
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));
}
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