303 lines
8.1 KiB
C
303 lines
8.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright 2011 Broadcom Corporation. All rights reserved. */
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#include <sound/core.h>
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#include <sound/control.h>
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#include <sound/tlv.h>
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#include <sound/asoundef.h>
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#include "bcm2835.h"
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/* volume maximum and minimum in terms of 0.01dB */
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#define CTRL_VOL_MAX 400
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#define CTRL_VOL_MIN -10239 /* originally -10240 */
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static int bcm2835_audio_set_chip_ctls(struct bcm2835_chip *chip)
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{
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int i, err = 0;
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/* change ctls for all substreams */
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for (i = 0; i < MAX_SUBSTREAMS; i++) {
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if (chip->alsa_stream[i]) {
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err = bcm2835_audio_set_ctls(chip->alsa_stream[i]);
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if (err < 0)
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break;
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}
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}
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return err;
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}
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static int snd_bcm2835_ctl_info(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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if (kcontrol->private_value == PCM_PLAYBACK_VOLUME) {
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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uinfo->count = 1;
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uinfo->value.integer.min = CTRL_VOL_MIN;
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uinfo->value.integer.max = CTRL_VOL_MAX; /* 2303 */
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} else if (kcontrol->private_value == PCM_PLAYBACK_MUTE) {
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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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} else if (kcontrol->private_value == PCM_PLAYBACK_DEVICE) {
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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uinfo->count = 1;
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uinfo->value.integer.min = 0;
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uinfo->value.integer.max = AUDIO_DEST_MAX - 1;
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}
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return 0;
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}
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static int snd_bcm2835_ctl_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct bcm2835_chip *chip = snd_kcontrol_chip(kcontrol);
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mutex_lock(&chip->audio_mutex);
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if (kcontrol->private_value == PCM_PLAYBACK_VOLUME)
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ucontrol->value.integer.value[0] = chip->volume;
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else if (kcontrol->private_value == PCM_PLAYBACK_MUTE)
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ucontrol->value.integer.value[0] = chip->mute;
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else if (kcontrol->private_value == PCM_PLAYBACK_DEVICE)
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ucontrol->value.integer.value[0] = chip->dest;
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mutex_unlock(&chip->audio_mutex);
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return 0;
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}
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static int snd_bcm2835_ctl_put(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct bcm2835_chip *chip = snd_kcontrol_chip(kcontrol);
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int val, *valp;
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int changed = 0;
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if (kcontrol->private_value == PCM_PLAYBACK_VOLUME)
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valp = &chip->volume;
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else if (kcontrol->private_value == PCM_PLAYBACK_MUTE)
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valp = &chip->mute;
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else if (kcontrol->private_value == PCM_PLAYBACK_DEVICE)
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valp = &chip->dest;
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else
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return -EINVAL;
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val = ucontrol->value.integer.value[0];
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mutex_lock(&chip->audio_mutex);
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if (val != *valp) {
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*valp = val;
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changed = 1;
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if (bcm2835_audio_set_chip_ctls(chip))
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dev_err(chip->card->dev, "Failed to set ALSA controls..\n");
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}
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mutex_unlock(&chip->audio_mutex);
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return changed;
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}
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static DECLARE_TLV_DB_SCALE(snd_bcm2835_db_scale, CTRL_VOL_MIN, 1, 1);
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static const struct snd_kcontrol_new snd_bcm2835_ctl[] = {
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{
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "PCM Playback Volume",
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.access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ,
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.private_value = PCM_PLAYBACK_VOLUME,
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.info = snd_bcm2835_ctl_info,
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.get = snd_bcm2835_ctl_get,
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.put = snd_bcm2835_ctl_put,
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.tlv = {.p = snd_bcm2835_db_scale}
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},
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{
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "PCM Playback Switch",
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.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
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.private_value = PCM_PLAYBACK_MUTE,
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.info = snd_bcm2835_ctl_info,
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.get = snd_bcm2835_ctl_get,
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.put = snd_bcm2835_ctl_put,
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},
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{
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "PCM Playback Route",
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.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
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.private_value = PCM_PLAYBACK_DEVICE,
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.info = snd_bcm2835_ctl_info,
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.get = snd_bcm2835_ctl_get,
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.put = snd_bcm2835_ctl_put,
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},
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};
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static int snd_bcm2835_spdif_default_info(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
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uinfo->count = 1;
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return 0;
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}
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static int snd_bcm2835_spdif_default_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct bcm2835_chip *chip = snd_kcontrol_chip(kcontrol);
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int i;
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mutex_lock(&chip->audio_mutex);
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for (i = 0; i < 4; i++)
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ucontrol->value.iec958.status[i] =
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(chip->spdif_status >> (i * 8)) & 0xff;
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mutex_unlock(&chip->audio_mutex);
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return 0;
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}
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static int snd_bcm2835_spdif_default_put(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct bcm2835_chip *chip = snd_kcontrol_chip(kcontrol);
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unsigned int val = 0;
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int i, change;
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mutex_lock(&chip->audio_mutex);
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for (i = 0; i < 4; i++)
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val |= (unsigned int)ucontrol->value.iec958.status[i] << (i * 8);
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change = val != chip->spdif_status;
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chip->spdif_status = val;
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mutex_unlock(&chip->audio_mutex);
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return change;
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}
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static int snd_bcm2835_spdif_mask_info(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
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uinfo->count = 1;
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return 0;
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}
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static int snd_bcm2835_spdif_mask_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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/*
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* bcm2835 supports only consumer mode and sets all other format flags
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* automatically. So the only thing left is signalling non-audio content
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*/
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ucontrol->value.iec958.status[0] = IEC958_AES0_NONAUDIO;
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return 0;
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}
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static const struct snd_kcontrol_new snd_bcm2835_spdif[] = {
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{
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.iface = SNDRV_CTL_ELEM_IFACE_PCM,
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.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
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.info = snd_bcm2835_spdif_default_info,
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.get = snd_bcm2835_spdif_default_get,
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.put = snd_bcm2835_spdif_default_put
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},
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{
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.access = SNDRV_CTL_ELEM_ACCESS_READ,
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.iface = SNDRV_CTL_ELEM_IFACE_PCM,
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.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, CON_MASK),
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.info = snd_bcm2835_spdif_mask_info,
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.get = snd_bcm2835_spdif_mask_get,
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},
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};
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static int create_ctls(struct bcm2835_chip *chip, size_t size,
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const struct snd_kcontrol_new *kctls)
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{
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int i, err;
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for (i = 0; i < size; i++) {
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err = snd_ctl_add(chip->card, snd_ctl_new1(&kctls[i], chip));
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if (err < 0)
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return err;
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}
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return 0;
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}
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int snd_bcm2835_new_ctl(struct bcm2835_chip *chip)
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{
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int err;
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strscpy(chip->card->mixername, "Broadcom Mixer", sizeof(chip->card->mixername));
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err = create_ctls(chip, ARRAY_SIZE(snd_bcm2835_ctl), snd_bcm2835_ctl);
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if (err < 0)
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return err;
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return create_ctls(chip, ARRAY_SIZE(snd_bcm2835_spdif),
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snd_bcm2835_spdif);
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}
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static const struct snd_kcontrol_new snd_bcm2835_headphones_ctl[] = {
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{
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "Headphone Playback Volume",
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.index = 0,
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.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
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SNDRV_CTL_ELEM_ACCESS_TLV_READ,
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.private_value = PCM_PLAYBACK_VOLUME,
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.info = snd_bcm2835_ctl_info,
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.get = snd_bcm2835_ctl_get,
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.put = snd_bcm2835_ctl_put,
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.count = 1,
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.tlv = {.p = snd_bcm2835_db_scale}
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},
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{
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "Headphone Playback Switch",
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.index = 0,
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.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
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.private_value = PCM_PLAYBACK_MUTE,
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.info = snd_bcm2835_ctl_info,
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.get = snd_bcm2835_ctl_get,
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.put = snd_bcm2835_ctl_put,
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.count = 1,
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}
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};
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int snd_bcm2835_new_headphones_ctl(struct bcm2835_chip *chip)
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{
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strscpy(chip->card->mixername, "Broadcom Mixer", sizeof(chip->card->mixername));
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return create_ctls(chip, ARRAY_SIZE(snd_bcm2835_headphones_ctl),
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snd_bcm2835_headphones_ctl);
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}
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static const struct snd_kcontrol_new snd_bcm2835_hdmi[] = {
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{
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "HDMI Playback Volume",
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.index = 0,
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.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
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SNDRV_CTL_ELEM_ACCESS_TLV_READ,
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.private_value = PCM_PLAYBACK_VOLUME,
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.info = snd_bcm2835_ctl_info,
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.get = snd_bcm2835_ctl_get,
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.put = snd_bcm2835_ctl_put,
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.count = 1,
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.tlv = {.p = snd_bcm2835_db_scale}
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},
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{
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "HDMI Playback Switch",
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.index = 0,
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.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
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.private_value = PCM_PLAYBACK_MUTE,
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.info = snd_bcm2835_ctl_info,
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.get = snd_bcm2835_ctl_get,
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.put = snd_bcm2835_ctl_put,
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.count = 1,
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}
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};
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int snd_bcm2835_new_hdmi_ctl(struct bcm2835_chip *chip)
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{
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strscpy(chip->card->mixername, "Broadcom Mixer", sizeof(chip->card->mixername));
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return create_ctls(chip, ARRAY_SIZE(snd_bcm2835_hdmi),
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snd_bcm2835_hdmi);
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}
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