466ae3055b
Previously, we had two separate controls; there's no need to have AD1888's HPF control, so drop it if we're on an OLPC machine. Also, as per Arjun's request, rename OLPC's Analog Input Switch control to "DC Mode Enable". Signed-off-by: Andres Salomon <dilinger@debian.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
102 lines
2.5 KiB
C
102 lines
2.5 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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struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
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u8 val;
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val = snd_ac97_read(cs5535au->ac97, AC97_AD_TEST2);
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val >>= AC97_AD_HPFD_SHIFT;
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v->value.integer.value[0] = val & 0x1;
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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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