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188 lines
4.5 KiB
188 lines
4.5 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* OLPC XO-1 additional sound features |
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* |
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* Copyright © 2006 Jaya Kumar <[email protected]> |
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* Copyright © 2007-2008 Andres Salomon <[email protected]> |
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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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dev_err(ac97->bus->card->dev, |
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"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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dev_err(ac97->bus->card->dev, "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 const struct snd_kcontrol_new olpc_cs5535audio_ctls[] = { |
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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 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 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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dev_err(card->dev, "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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strscpy(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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strscpy(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 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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