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Diffstat (limited to 'drivers/staging/vc04_services/bcm2835-audio/bcm2835-ctl.c')
-rw-r--r--drivers/staging/vc04_services/bcm2835-audio/bcm2835-ctl.c426
1 files changed, 426 insertions, 0 deletions
diff --git a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-ctl.c b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-ctl.c
new file mode 100644
index 0000000..f484bb0
--- /dev/null
+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-ctl.c
@@ -0,0 +1,426 @@
+/*****************************************************************************
+ * Copyright 2011 Broadcom Corporation. All rights reserved.
+ *
+ * Unless you and Broadcom execute a separate written software license
+ * agreement governing use of this software, this software is licensed to you
+ * under the terms of the GNU General Public License version 2, available at
+ * http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
+ *
+ * Notwithstanding the above, under no circumstances may you combine this
+ * software in any way with any other Broadcom software provided under a
+ * license other than the GPL, without Broadcom's express prior written
+ * consent.
+ *****************************************************************************/
+
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/jiffies.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+#include <linux/moduleparam.h>
+#include <linux/sched.h>
+
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/rawmidi.h>
+#include <sound/initval.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 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;
+}
+
+/* toggles mute on or off depending on the value of nmute, and returns
+ * 1 if the mute value was changed, otherwise 0
+ */
+static int toggle_mute(struct bcm2835_chip *chip, int nmute)
+{
+ /* if settings are ok, just return 0 */
+ if (chip->mute == nmute)
+ return 0;
+
+ /* if the sound is muted then we need to unmute */
+ if (chip->mute == CTRL_VOL_MUTE) {
+ chip->volume = chip->old_volume; /* copy the old volume back */
+ audio_info("Unmuting, old_volume = %d, volume = %d ...\n", chip->old_volume, chip->volume);
+ } else /* otherwise we mute */ {
+ chip->old_volume = chip->volume;
+ chip->volume = 26214; /* set volume to minimum level AKA mute */
+ audio_info("Muting, old_volume = %d, volume = %d ...\n", chip->old_volume, chip->volume);
+ }
+
+ chip->mute = nmute;
+ return 1;
+}
+
+static int snd_bcm2835_ctl_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct bcm2835_chip *chip = snd_kcontrol_chip(kcontrol);
+
+ if (mutex_lock_interruptible(&chip->audio_mutex))
+ return -EINTR;
+
+ BUG_ON(!chip && !(chip->avail_substreams & AVAIL_SUBSTREAMS_MASK));
+
+ if (kcontrol->private_value == PCM_PLAYBACK_VOLUME)
+ ucontrol->value.integer.value[0] = chip2alsa(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 changed = 0;
+
+ if (mutex_lock_interruptible(&chip->audio_mutex))
+ return -EINTR;
+
+ if (kcontrol->private_value == PCM_PLAYBACK_VOLUME) {
+ audio_info("Volume change attempted.. volume = %d new_volume = %d\n", chip->volume, (int)ucontrol->value.integer.value[0]);
+ if (chip->mute == CTRL_VOL_MUTE) {
+ /* changed = toggle_mute(chip, CTRL_VOL_UNMUTE); */
+ changed = 1; /* should return 0 to signify no change but the mixer takes this as the opposite sign (no idea why) */
+ goto unlock;
+ }
+ if (changed || (ucontrol->value.integer.value[0] != chip2alsa(chip->volume))) {
+ chip->volume = alsa2chip(ucontrol->value.integer.value[0]);
+ changed = 1;
+ }
+
+ } else if (kcontrol->private_value == PCM_PLAYBACK_MUTE) {
+ /* Now implemented */
+ audio_info(" Mute attempted\n");
+ changed = toggle_mute(chip, ucontrol->value.integer.value[0]);
+
+ } else if (kcontrol->private_value == PCM_PLAYBACK_DEVICE) {
+ if (ucontrol->value.integer.value[0] != chip->dest) {
+ chip->dest = ucontrol->value.integer.value[0];
+ changed = 1;
+ }
+ }
+
+ if (changed && bcm2835_audio_set_ctls(chip))
+ dev_err(chip->card->dev, "Failed to set ALSA controls..\n");
+
+unlock:
+ mutex_unlock(&chip->audio_mutex);
+ return changed;
+}
+
+static DECLARE_TLV_DB_SCALE(snd_bcm2835_db_scale, CTRL_VOL_MIN, 1, 1);
+
+static struct snd_kcontrol_new snd_bcm2835_ctl[] = {
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "PCM Playback Volume",
+ .index = 0,
+ .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,
+ .count = 1,
+ .tlv = {.p = snd_bcm2835_db_scale}
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "PCM Playback Switch",
+ .index = 0,
+ .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,
+ .count = 1,
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "PCM Playback Route",
+ .index = 0,
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+ .private_value = PCM_PLAYBACK_DEVICE,
+ .info = snd_bcm2835_ctl_info,
+ .get = snd_bcm2835_ctl_get,
+ .put = snd_bcm2835_ctl_put,
+ .count = 1,
+ },
+};
+
+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;
+
+ if (mutex_lock_interruptible(&chip->audio_mutex))
+ return -EINTR;
+
+ 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;
+
+ if (mutex_lock_interruptible(&chip->audio_mutex))
+ return -EINTR;
+
+ 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 int snd_bcm2835_spdif_stream_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_stream_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct bcm2835_chip *chip = snd_kcontrol_chip(kcontrol);
+ int i;
+
+ if (mutex_lock_interruptible(&chip->audio_mutex))
+ return -EINTR;
+
+ 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_stream_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;
+
+ if (mutex_lock_interruptible(&chip->audio_mutex))
+ return -EINTR;
+
+ 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 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,
+ },
+ {
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
+ SNDRV_CTL_ELEM_ACCESS_INACTIVE,
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, PCM_STREAM),
+ .info = snd_bcm2835_spdif_stream_info,
+ .get = snd_bcm2835_spdif_stream_get,
+ .put = snd_bcm2835_spdif_stream_put,
+ },
+};
+
+int snd_bcm2835_new_ctl(struct bcm2835_chip *chip)
+{
+ int err;
+ unsigned int idx;
+
+ strcpy(chip->card->mixername, "Broadcom Mixer");
+ for (idx = 0; idx < ARRAY_SIZE(snd_bcm2835_ctl); idx++) {
+ err = snd_ctl_add(chip->card,
+ snd_ctl_new1(&snd_bcm2835_ctl[idx], chip));
+ if (err < 0)
+ return err;
+ }
+ for (idx = 0; idx < ARRAY_SIZE(snd_bcm2835_spdif); idx++) {
+ err = snd_ctl_add(chip->card,
+ snd_ctl_new1(&snd_bcm2835_spdif[idx], chip));
+ if (err < 0)
+ return err;
+ }
+ return 0;
+}
+
+static struct snd_kcontrol_new snd_bcm2835_headphones_ctl[] = {
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "Headphone Playback Volume",
+ .index = 0,
+ .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,
+ .count = 1,
+ .tlv = {.p = snd_bcm2835_db_scale}
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "Headphone Playback Switch",
+ .index = 0,
+ .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,
+ .count = 1,
+ }
+};
+
+int snd_bcm2835_new_headphones_ctl(struct bcm2835_chip *chip)
+{
+ int err;
+ unsigned int idx;
+
+ strcpy(chip->card->mixername, "Broadcom Mixer");
+ for (idx = 0; idx < ARRAY_SIZE(snd_bcm2835_headphones_ctl); idx++) {
+ err = snd_ctl_add(chip->card,
+ snd_ctl_new1(&snd_bcm2835_headphones_ctl[idx],
+ chip));
+ if (err)
+ return err;
+ }
+ return 0;
+}
+
+static struct snd_kcontrol_new snd_bcm2835_hdmi[] = {
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "HDMI Playback Volume",
+ .index = 0,
+ .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,
+ .count = 1,
+ .tlv = {.p = snd_bcm2835_db_scale}
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "HDMI Playback Switch",
+ .index = 0,
+ .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,
+ .count = 1,
+ }
+};
+
+int snd_bcm2835_new_hdmi_ctl(struct bcm2835_chip *chip)
+{
+ int err;
+ unsigned int idx;
+
+ strcpy(chip->card->mixername, "Broadcom Mixer");
+ for (idx = 0; idx < ARRAY_SIZE(snd_bcm2835_hdmi); idx++) {
+ err = snd_ctl_add(chip->card,
+ snd_ctl_new1(&snd_bcm2835_hdmi[idx], chip));
+ if (err)
+ return err;
+ }
+ return 0;
+}
+
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