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