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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,200 @@ | ||
| /***************************************************************************** | ||
| * 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 "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) | ||
| { | ||
| audio_info(" ... IN\n"); | ||
| 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; | ||
| } | ||
| audio_info(" ... OUT\n"); | ||
| 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); | ||
|
|
||
| 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; | ||
|
|
||
| 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 (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); */ | ||
| return 1; /* should return 0 to signify no change but the mixer takes this as the opposite sign (no idea why) */ | ||
| } | ||
| 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) { | ||
| if (bcm2835_audio_set_ctls(chip)) | ||
| printk(KERN_ERR "Failed to set ALSA controls..\n"); | ||
| } | ||
|
|
||
| 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, | ||
| }, | ||
| }; | ||
|
|
||
| int snd_bcm2835_new_ctl(bcm2835_chip_t * 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; | ||
| } | ||
| return 0; | ||
| } |
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