forked from Minki/linux
3c55494670
Previously, OLPC support for the mic extensions was only enabled in the ALSA driver if CONFIG_OLPC and CONFIG_MGEODE_LX were both set. This was because the old geode GPIO code was written in a manner that assumed CONFIG_MGEODE_LX. With the new cs553x-gpio driver, this is no longer the case; as such, we can drop the requirement on CONFIG_MGEODE_LX and instead include a requirement on GPIOLIB. We use the generic GPIO API rather than the cs553x-specific API. Signed-off-by: Andres Salomon <dilinger@collabora.co.uk> Cc: Takashi Iwai <tiwai@suse.de> Cc: Jordan Crouse <jordan@cosmicpenguin.net> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
192 lines
4.7 KiB
C
192 lines
4.7 KiB
C
/*
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* OLPC XO-1 additional sound features
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*
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* Copyright © 2006 Jaya Kumar <jayakumar.lkml@gmail.com>
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* Copyright © 2007-2008 Andres Salomon <dilinger@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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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 <linux/gpio.h>
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#include <asm/olpc.h>
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#include "cs5535audio.h"
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#define DRV_NAME "cs5535audio-olpc"
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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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if (!machine_is_olpc())
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return;
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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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gpio_set_value(OLPC_GPIO_MIC_AC, on);
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}
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/*
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* OLPC XO-1's V_REFOUT is a mic bias enable.
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*/
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void olpc_mic_bias(struct snd_ac97 *ac97, int on)
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{
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int err;
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if (!machine_is_olpc())
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return;
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on = on ? 0 : 1;
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err = snd_ac97_update_bits(ac97, AC97_AD_MISC,
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1 << AC97_AD_VREFD_SHIFT, on << AC97_AD_VREFD_SHIFT);
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if (err < 0)
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snd_printk(KERN_ERR "setting MIC Bias - %d\n", err);
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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] = gpio_get_value(OLPC_GPIO_MIC_AC);
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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 int olpc_mic_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_mic_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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struct snd_ac97 *ac97 = cs5535au->ac97;
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int i;
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i = (snd_ac97_read(ac97, AC97_AD_MISC) >> AC97_AD_VREFD_SHIFT) & 0x1;
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v->value.integer.value[0] = i ? 0 : 1;
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return 0;
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}
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static int olpc_mic_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_mic_bias(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 olpc_cs5535audio_ctls[] __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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{
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "MIC Bias Enable",
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.info = olpc_mic_info,
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.get = olpc_mic_get,
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.put = olpc_mic_put,
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.private_value = 0,
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},
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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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int i, err;
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if (!machine_is_olpc())
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return 0;
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if (gpio_request(OLPC_GPIO_MIC_AC, DRV_NAME)) {
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printk(KERN_ERR DRV_NAME ": unable to allocate MIC GPIO\n");
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return -EIO;
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}
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gpio_direction_output(OLPC_GPIO_MIC_AC, 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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/* drop the original V_REFOUT 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, "V_REFOUT Enable", sizeof(elem.name));
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snd_ctl_remove_id(card, &elem);
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/* add the OLPC-specific controls */
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for (i = 0; i < ARRAY_SIZE(olpc_cs5535audio_ctls); i++) {
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err = snd_ctl_add(card, snd_ctl_new1(&olpc_cs5535audio_ctls[i],
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ac97->private_data));
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if (err < 0) {
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gpio_free(OLPC_GPIO_MIC_AC);
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return err;
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}
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}
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/* turn off the mic by default */
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olpc_mic_bias(ac97, 0);
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return 0;
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}
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void __devexit olpc_quirks_cleanup(void)
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{
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gpio_free(OLPC_GPIO_MIC_AC);
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}
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