189d34e747
Checking the HPF register is irrelevant; HPF is secondary to the AI mode. Instead, check for Analog Input mode via GPIO. Signed-off-by: Andres Salomon <dilinger@debian.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
#include <sound/driver.h>
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#include <sound/core.h>
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#include <sound/info.h>
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#include <sound/control.h>
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#include <sound/ac97_codec.h>
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#include <asm/olpc.h>
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#include "cs5535audio.h"
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/*
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* OLPC has an additional feature on top of the regular AD1888 codec features.
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* It has an Analog Input mode that is switched into (after disabling the
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* High Pass Filter) via GPIO. It is supported on B2 and later models.
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*/
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void olpc_analog_input(struct snd_ac97 *ac97, int on)
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{
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int err;
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/* update the High Pass Filter (via AC97_AD_TEST2) */
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err = snd_ac97_update_bits(ac97, AC97_AD_TEST2,
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1 << AC97_AD_HPFD_SHIFT, on << AC97_AD_HPFD_SHIFT);
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if (err < 0) {
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snd_printk(KERN_ERR "setting High Pass Filter - %d\n", err);
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return;
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}
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/* set Analog Input through GPIO */
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if (on)
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geode_gpio_set(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL);
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else
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geode_gpio_clear(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL);
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}
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static int olpc_dc_info(struct snd_kcontrol *kctl,
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struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
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uinfo->count = 1;
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uinfo->value.integer.min = 0;
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uinfo->value.integer.max = 1;
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return 0;
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}
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static int olpc_dc_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
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{
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v->value.integer.value[0] = geode_gpio_isset(OLPC_GPIO_MIC_AC,
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GPIO_OUTPUT_VAL);
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return 0;
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}
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static int olpc_dc_put(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
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{
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struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
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olpc_analog_input(cs5535au->ac97, v->value.integer.value[0]);
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return 1;
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}
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static struct snd_kcontrol_new snd_cs5535audio_controls __devinitdata =
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{
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "DC Mode Enable",
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.info = olpc_dc_info,
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.get = olpc_dc_get,
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.put = olpc_dc_put,
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.private_value = 0
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};
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void __devinit olpc_prequirks(struct snd_card *card,
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struct snd_ac97_template *ac97)
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{
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if (!machine_is_olpc())
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return;
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/* invert EAPD if on an OLPC B3 or higher */
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if (olpc_board_at_least(olpc_board_pre(0xb3)))
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ac97->scaps |= AC97_SCAP_INV_EAPD;
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}
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int __devinit olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97)
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{
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struct snd_ctl_elem_id elem;
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if (!machine_is_olpc())
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return 0;
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/* drop the original AD1888 HPF control */
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memset(&elem, 0, sizeof(elem));
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elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
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strncpy(elem.name, "High Pass Filter Enable", sizeof(elem.name));
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snd_ctl_remove_id(card, &elem);
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/* add the override for OLPC's HPF */
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return snd_ctl_add(card, snd_ctl_new1(&snd_cs5535audio_controls,
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ac97->private_data));
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}
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