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![Dan Carpenter](/assets/img/avatar_default.png)
We intended to mask away the upper bits but there is a "&&" vs "&" typo
so it's broken.
Fixes: 23b028c871
("staging: bcm2835-audio: initial staging submission")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
345 lines
9.8 KiB
C
345 lines
9.8 KiB
C
/*****************************************************************************
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* Copyright 2011 Broadcom Corporation. All rights reserved.
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*
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* Unless you and Broadcom execute a separate written software license
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* agreement governing use of this software, this software is licensed to you
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* under the terms of the GNU General Public License version 2, available at
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* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
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*
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* Notwithstanding the above, under no circumstances may you combine this
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* software in any way with any other Broadcom software provided under a
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* license other than the GPL, without Broadcom's express prior written
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* consent.
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*****************************************************************************/
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#include <linux/platform_device.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/jiffies.h>
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#include <linux/slab.h>
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#include <linux/time.h>
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#include <linux/wait.h>
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#include <linux/delay.h>
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#include <linux/moduleparam.h>
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#include <linux/sched.h>
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#include <sound/core.h>
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#include <sound/control.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/rawmidi.h>
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#include <sound/initval.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 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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audio_info(" ... IN\n");
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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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audio_info(" ... OUT\n");
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return 0;
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}
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/* toggles mute on or off depending on the value of nmute, and returns
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* 1 if the mute value was changed, otherwise 0
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*/
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static int toggle_mute(struct bcm2835_chip *chip, int nmute)
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{
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/* if settings are ok, just return 0 */
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if (chip->mute == nmute)
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return 0;
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/* if the sound is muted then we need to unmute */
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if (chip->mute == CTRL_VOL_MUTE) {
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chip->volume = chip->old_volume; /* copy the old volume back */
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audio_info("Unmuting, old_volume = %d, volume = %d ...\n", chip->old_volume, chip->volume);
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} else /* otherwise we mute */ {
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chip->old_volume = chip->volume;
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chip->volume = 26214; /* set volume to minimum level AKA mute */
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audio_info("Muting, old_volume = %d, volume = %d ...\n", chip->old_volume, chip->volume);
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}
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chip->mute = nmute;
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return 1;
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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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if (mutex_lock_interruptible(&chip->audio_mutex))
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return -EINTR;
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BUG_ON(!chip && !(chip->avail_substreams & AVAIL_SUBSTREAMS_MASK));
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if (kcontrol->private_value == PCM_PLAYBACK_VOLUME)
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ucontrol->value.integer.value[0] = chip2alsa(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 changed = 0;
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if (mutex_lock_interruptible(&chip->audio_mutex))
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return -EINTR;
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if (kcontrol->private_value == PCM_PLAYBACK_VOLUME) {
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audio_info("Volume change attempted.. volume = %d new_volume = %d\n", chip->volume, (int) ucontrol->value.integer.value[0]);
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if (chip->mute == CTRL_VOL_MUTE) {
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/* changed = toggle_mute(chip, CTRL_VOL_UNMUTE); */
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changed = 1; /* should return 0 to signify no change but the mixer takes this as the opposite sign (no idea why) */
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goto unlock;
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}
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if (changed
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|| (ucontrol->value.integer.value[0] != chip2alsa(chip->volume))) {
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chip->volume = alsa2chip(ucontrol->value.integer.value[0]);
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changed = 1;
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}
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} else if (kcontrol->private_value == PCM_PLAYBACK_MUTE) {
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/* Now implemented */
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audio_info(" Mute attempted\n");
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changed = toggle_mute(chip, ucontrol->value.integer.value[0]);
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} else if (kcontrol->private_value == PCM_PLAYBACK_DEVICE) {
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if (ucontrol->value.integer.value[0] != chip->dest) {
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chip->dest = ucontrol->value.integer.value[0];
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changed = 1;
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}
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}
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if (changed) {
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if (bcm2835_audio_set_ctls(chip))
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printk(KERN_ERR "Failed to set ALSA controls..\n");
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}
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unlock:
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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 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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.index = 0,
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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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.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 = "PCM 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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.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "PCM Playback Route",
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.index = 0,
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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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.count = 1,
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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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if (mutex_lock_interruptible(&chip->audio_mutex))
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return -EINTR;
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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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if (mutex_lock_interruptible(&chip->audio_mutex))
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return -EINTR;
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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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/* 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
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* content */
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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 int snd_bcm2835_spdif_stream_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_stream_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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if (mutex_lock_interruptible(&chip->audio_mutex))
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return -EINTR;
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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_stream_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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if (mutex_lock_interruptible(&chip->audio_mutex))
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return -EINTR;
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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 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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.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
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SNDRV_CTL_ELEM_ACCESS_INACTIVE,
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.iface = SNDRV_CTL_ELEM_IFACE_PCM,
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.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, PCM_STREAM),
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.info = snd_bcm2835_spdif_stream_info,
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.get = snd_bcm2835_spdif_stream_get,
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.put = snd_bcm2835_spdif_stream_put,
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},
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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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unsigned int idx;
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strcpy(chip->card->mixername, "Broadcom Mixer");
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for (idx = 0; idx < ARRAY_SIZE(snd_bcm2835_ctl); idx++) {
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err = snd_ctl_add(chip->card,
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snd_ctl_new1(&snd_bcm2835_ctl[idx], chip));
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if (err < 0)
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return err;
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}
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for (idx = 0; idx < ARRAY_SIZE(snd_bcm2835_spdif); idx++) {
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err = snd_ctl_add(chip->card,
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snd_ctl_new1(&snd_bcm2835_spdif[idx], 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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