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freebsd-skq/sys/dev/sound/pcm/mixer.c
pfg 1537078d8f sys/dev: further adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 14:52:40 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
* Portions Copyright (c) Ryan Beasley <ryan.beasley@gmail.com> - GSoC 2006
* Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifdef HAVE_KERNEL_OPTION_HEADERS
#include "opt_snd.h"
#endif
#include <dev/sound/pcm/sound.h>
#include "feeder_if.h"
#include "mixer_if.h"
SND_DECLARE_FILE("$FreeBSD$");
static MALLOC_DEFINE(M_MIXER, "mixer", "mixer");
static int mixer_bypass = 1;
SYSCTL_INT(_hw_snd, OID_AUTO, vpc_mixer_bypass, CTLFLAG_RWTUN,
&mixer_bypass, 0,
"control channel pcm/rec volume, bypassing real mixer device");
#define MIXER_NAMELEN 16
struct snd_mixer {
KOBJ_FIELDS;
void *devinfo;
int busy;
int hwvol_muted;
int hwvol_mixer;
int hwvol_step;
int type;
device_t dev;
u_int32_t hwvol_mute_level;
u_int32_t devs;
u_int32_t recdevs;
u_int32_t recsrc;
u_int16_t level[32];
u_int8_t parent[32];
u_int32_t child[32];
u_int8_t realdev[32];
char name[MIXER_NAMELEN];
struct mtx *lock;
oss_mixer_enuminfo enuminfo;
/**
* Counter is incremented when applications change any of this
* mixer's controls. A change in value indicates that persistent
* mixer applications should update their displays.
*/
int modify_counter;
};
static u_int16_t snd_mixerdefaults[SOUND_MIXER_NRDEVICES] = {
[SOUND_MIXER_VOLUME] = 75,
[SOUND_MIXER_BASS] = 50,
[SOUND_MIXER_TREBLE] = 50,
[SOUND_MIXER_SYNTH] = 75,
[SOUND_MIXER_PCM] = 75,
[SOUND_MIXER_SPEAKER] = 75,
[SOUND_MIXER_LINE] = 75,
[SOUND_MIXER_MIC] = 0,
[SOUND_MIXER_CD] = 75,
[SOUND_MIXER_IGAIN] = 0,
[SOUND_MIXER_LINE1] = 75,
[SOUND_MIXER_VIDEO] = 75,
[SOUND_MIXER_RECLEV] = 75,
[SOUND_MIXER_OGAIN] = 50,
[SOUND_MIXER_MONITOR] = 75,
};
static char* snd_mixernames[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
static d_open_t mixer_open;
static d_close_t mixer_close;
static d_ioctl_t mixer_ioctl;
static struct cdevsw mixer_cdevsw = {
.d_version = D_VERSION,
.d_open = mixer_open,
.d_close = mixer_close,
.d_ioctl = mixer_ioctl,
.d_name = "mixer",
};
/**
* Keeps a count of mixer devices; used only by OSSv4 SNDCTL_SYSINFO ioctl.
*/
int mixer_count = 0;
static eventhandler_tag mixer_ehtag = NULL;
static struct cdev *
mixer_get_devt(device_t dev)
{
struct snddev_info *snddev;
snddev = device_get_softc(dev);
return snddev->mixer_dev;
}
static int
mixer_lookup(char *devname)
{
int i;
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
if (strncmp(devname, snd_mixernames[i],
strlen(snd_mixernames[i])) == 0)
return i;
return -1;
}
#define MIXER_SET_UNLOCK(x, y) do { \
if ((y) != 0) \
snd_mtxunlock((x)->lock); \
} while (0)
#define MIXER_SET_LOCK(x, y) do { \
if ((y) != 0) \
snd_mtxlock((x)->lock); \
} while (0)
static int
mixer_set_softpcmvol(struct snd_mixer *m, struct snddev_info *d,
u_int left, u_int right)
{
struct pcm_channel *c;
int dropmtx, acquiremtx;
if (!PCM_REGISTERED(d))
return (EINVAL);
if (mtx_owned(m->lock))
dropmtx = 1;
else
dropmtx = 0;
if (!(d->flags & SD_F_MPSAFE) || mtx_owned(d->lock) != 0)
acquiremtx = 0;
else
acquiremtx = 1;
/*
* Be careful here. If we're coming from cdev ioctl, it is OK to
* not doing locking AT ALL (except on individual channel) since
* we've been heavily guarded by pcm cv, or if we're still
* under Giant influence. Since we also have mix_* calls, we cannot
* assume such protection and just do the lock as usuall.
*/
MIXER_SET_UNLOCK(m, dropmtx);
MIXER_SET_LOCK(d, acquiremtx);
CHN_FOREACH(c, d, channels.pcm.busy) {
CHN_LOCK(c);
if (c->direction == PCMDIR_PLAY &&
(c->feederflags & (1 << FEEDER_VOLUME)))
chn_setvolume_multi(c, SND_VOL_C_MASTER, left, right,
(left + right) >> 1);
CHN_UNLOCK(c);
}
MIXER_SET_UNLOCK(d, acquiremtx);
MIXER_SET_LOCK(m, dropmtx);
return (0);
}
static int
mixer_set_eq(struct snd_mixer *m, struct snddev_info *d,
u_int dev, u_int level)
{
struct pcm_channel *c;
struct pcm_feeder *f;
int tone, dropmtx, acquiremtx;
if (dev == SOUND_MIXER_TREBLE)
tone = FEEDEQ_TREBLE;
else if (dev == SOUND_MIXER_BASS)
tone = FEEDEQ_BASS;
else
return (EINVAL);
if (!PCM_REGISTERED(d))
return (EINVAL);
if (mtx_owned(m->lock))
dropmtx = 1;
else
dropmtx = 0;
if (!(d->flags & SD_F_MPSAFE) || mtx_owned(d->lock) != 0)
acquiremtx = 0;
else
acquiremtx = 1;
/*
* Be careful here. If we're coming from cdev ioctl, it is OK to
* not doing locking AT ALL (except on individual channel) since
* we've been heavily guarded by pcm cv, or if we're still
* under Giant influence. Since we also have mix_* calls, we cannot
* assume such protection and just do the lock as usuall.
*/
MIXER_SET_UNLOCK(m, dropmtx);
MIXER_SET_LOCK(d, acquiremtx);
CHN_FOREACH(c, d, channels.pcm.busy) {
CHN_LOCK(c);
f = chn_findfeeder(c, FEEDER_EQ);
if (f != NULL)
(void)FEEDER_SET(f, tone, level);
CHN_UNLOCK(c);
}
MIXER_SET_UNLOCK(d, acquiremtx);
MIXER_SET_LOCK(m, dropmtx);
return (0);
}
static int
mixer_set(struct snd_mixer *m, u_int dev, u_int lev)
{
struct snddev_info *d;
u_int l, r, tl, tr;
u_int32_t parent = SOUND_MIXER_NONE, child = 0;
u_int32_t realdev;
int i, dropmtx;
if (m == NULL || dev >= SOUND_MIXER_NRDEVICES ||
(0 == (m->devs & (1 << dev))))
return -1;
l = min((lev & 0x00ff), 100);
r = min(((lev & 0xff00) >> 8), 100);
realdev = m->realdev[dev];
d = device_get_softc(m->dev);
if (d == NULL)
return -1;
/* It is safe to drop this mutex due to Giant. */
if (!(d->flags & SD_F_MPSAFE) && mtx_owned(m->lock) != 0)
dropmtx = 1;
else
dropmtx = 0;
MIXER_SET_UNLOCK(m, dropmtx);
/* TODO: recursive handling */
parent = m->parent[dev];
if (parent >= SOUND_MIXER_NRDEVICES)
parent = SOUND_MIXER_NONE;
if (parent == SOUND_MIXER_NONE)
child = m->child[dev];
if (parent != SOUND_MIXER_NONE) {
tl = (l * (m->level[parent] & 0x00ff)) / 100;
tr = (r * ((m->level[parent] & 0xff00) >> 8)) / 100;
if (dev == SOUND_MIXER_PCM && (d->flags & SD_F_SOFTPCMVOL))
(void)mixer_set_softpcmvol(m, d, tl, tr);
else if (realdev != SOUND_MIXER_NONE &&
MIXER_SET(m, realdev, tl, tr) < 0) {
MIXER_SET_LOCK(m, dropmtx);
return -1;
}
} else if (child != 0) {
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
if (!(child & (1 << i)) || m->parent[i] != dev)
continue;
realdev = m->realdev[i];
tl = (l * (m->level[i] & 0x00ff)) / 100;
tr = (r * ((m->level[i] & 0xff00) >> 8)) / 100;
if (i == SOUND_MIXER_PCM &&
(d->flags & SD_F_SOFTPCMVOL))
(void)mixer_set_softpcmvol(m, d, tl, tr);
else if (realdev != SOUND_MIXER_NONE)
MIXER_SET(m, realdev, tl, tr);
}
realdev = m->realdev[dev];
if (realdev != SOUND_MIXER_NONE &&
MIXER_SET(m, realdev, l, r) < 0) {
MIXER_SET_LOCK(m, dropmtx);
return -1;
}
} else {
if (dev == SOUND_MIXER_PCM && (d->flags & SD_F_SOFTPCMVOL))
(void)mixer_set_softpcmvol(m, d, l, r);
else if ((dev == SOUND_MIXER_TREBLE ||
dev == SOUND_MIXER_BASS) && (d->flags & SD_F_EQ))
(void)mixer_set_eq(m, d, dev, (l + r) >> 1);
else if (realdev != SOUND_MIXER_NONE &&
MIXER_SET(m, realdev, l, r) < 0) {
MIXER_SET_LOCK(m, dropmtx);
return -1;
}
}
MIXER_SET_LOCK(m, dropmtx);
m->level[dev] = l | (r << 8);
return 0;
}
static int
mixer_get(struct snd_mixer *mixer, int dev)
{
if ((dev < SOUND_MIXER_NRDEVICES) && (mixer->devs & (1 << dev)))
return mixer->level[dev];
else
return -1;
}
static int
mixer_setrecsrc(struct snd_mixer *mixer, u_int32_t src)
{
struct snddev_info *d;
u_int32_t recsrc;
int dropmtx;
d = device_get_softc(mixer->dev);
if (d == NULL)
return -1;
if (!(d->flags & SD_F_MPSAFE) && mtx_owned(mixer->lock) != 0)
dropmtx = 1;
else
dropmtx = 0;
src &= mixer->recdevs;
if (src == 0)
src = mixer->recdevs & SOUND_MASK_MIC;
if (src == 0)
src = mixer->recdevs & SOUND_MASK_MONITOR;
if (src == 0)
src = mixer->recdevs & SOUND_MASK_LINE;
if (src == 0 && mixer->recdevs != 0)
src = (1 << (ffs(mixer->recdevs) - 1));
/* It is safe to drop this mutex due to Giant. */
MIXER_SET_UNLOCK(mixer, dropmtx);
recsrc = MIXER_SETRECSRC(mixer, src);
MIXER_SET_LOCK(mixer, dropmtx);
mixer->recsrc = recsrc;
return 0;
}
static int
mixer_getrecsrc(struct snd_mixer *mixer)
{
return mixer->recsrc;
}
/**
* @brief Retrieve the route number of the current recording device
*
* OSSv4 assigns routing numbers to recording devices, unlike the previous
* API which relied on a fixed table of device numbers and names. This
* function returns the routing number of the device currently selected
* for recording.
*
* For now, this function is kind of a goofy compatibility stub atop the
* existing sound system. (For example, in theory, the old sound system
* allows multiple recording devices to be specified via a bitmask.)
*
* @param m mixer context container thing
*
* @retval 0 success
* @retval EIDRM no recording device found (generally not possible)
* @todo Ask about error code
*/
static int
mixer_get_recroute(struct snd_mixer *m, int *route)
{
int i, cnt;
cnt = 0;
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
/** @todo can user set a multi-device mask? (== or &?) */
if ((1 << i) == m->recsrc)
break;
if ((1 << i) & m->recdevs)
++cnt;
}
if (i == SOUND_MIXER_NRDEVICES)
return EIDRM;
*route = cnt;
return 0;
}
/**
* @brief Select a device for recording
*
* This function sets a recording source based on a recording device's
* routing number. Said number is translated to an old school recdev
* mask and passed over mixer_setrecsrc.
*
* @param m mixer context container thing
*
* @retval 0 success(?)
* @retval EINVAL User specified an invalid device number
* @retval otherwise error from mixer_setrecsrc
*/
static int
mixer_set_recroute(struct snd_mixer *m, int route)
{
int i, cnt, ret;
ret = 0;
cnt = 0;
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
if ((1 << i) & m->recdevs) {
if (route == cnt)
break;
++cnt;
}
}
if (i == SOUND_MIXER_NRDEVICES)
ret = EINVAL;
else
ret = mixer_setrecsrc(m, (1 << i));
return ret;
}
void
mix_setdevs(struct snd_mixer *m, u_int32_t v)
{
struct snddev_info *d;
int i;
if (m == NULL)
return;
d = device_get_softc(m->dev);
if (d != NULL && (d->flags & SD_F_SOFTPCMVOL))
v |= SOUND_MASK_PCM;
if (d != NULL && (d->flags & SD_F_EQ))
v |= SOUND_MASK_TREBLE | SOUND_MASK_BASS;
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
if (m->parent[i] < SOUND_MIXER_NRDEVICES)
v |= 1 << m->parent[i];
v |= m->child[i];
}
m->devs = v;
}
/**
* @brief Record mask of available recording devices
*
* Calling functions are responsible for defining the mask of available
* recording devices. This function records that value in a structure
* used by the rest of the mixer code.
*
* This function also populates a structure used by the SNDCTL_DSP_*RECSRC*
* family of ioctls that are part of OSSV4. All recording device labels
* are concatenated in ascending order corresponding to their routing
* numbers. (Ex: a system might have 0 => 'vol', 1 => 'cd', 2 => 'line',
* etc.) For now, these labels are just the standard recording device
* names (cd, line1, etc.), but will eventually be fully dynamic and user
* controlled.
*
* @param m mixer device context container thing
* @param v mask of recording devices
*/
void
mix_setrecdevs(struct snd_mixer *m, u_int32_t v)
{
oss_mixer_enuminfo *ei;
char *loc;
int i, nvalues, nwrote, nleft, ncopied;
ei = &m->enuminfo;
nvalues = 0;
nwrote = 0;
nleft = sizeof(ei->strings);
loc = ei->strings;
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
if ((1 << i) & v) {
ei->strindex[nvalues] = nwrote;
ncopied = strlcpy(loc, snd_mixernames[i], nleft) + 1;
/* strlcpy retval doesn't include terminator */
nwrote += ncopied;
nleft -= ncopied;
nvalues++;
/*
* XXX I don't think this should ever be possible.
* Even with a move to dynamic device/channel names,
* each label is limited to ~16 characters, so that'd
* take a LOT to fill this buffer.
*/
if ((nleft <= 0) || (nvalues >= OSS_ENUM_MAXVALUE)) {
device_printf(m->dev,
"mix_setrecdevs: Not enough room to store device names--please file a bug report.\n");
device_printf(m->dev,
"mix_setrecdevs: Please include details about your sound hardware, OS version, etc.\n");
break;
}
loc = &ei->strings[nwrote];
}
}
/*
* NB: The SNDCTL_DSP_GET_RECSRC_NAMES ioctl ignores the dev
* and ctrl fields.
*/
ei->nvalues = nvalues;
m->recdevs = v;
}
void
mix_setparentchild(struct snd_mixer *m, u_int32_t parent, u_int32_t childs)
{
u_int32_t mask = 0;
int i;
if (m == NULL || parent >= SOUND_MIXER_NRDEVICES)
return;
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
if (i == parent)
continue;
if (childs & (1 << i)) {
mask |= 1 << i;
if (m->parent[i] < SOUND_MIXER_NRDEVICES)
m->child[m->parent[i]] &= ~(1 << i);
m->parent[i] = parent;
m->child[i] = 0;
}
}
mask &= ~(1 << parent);
m->child[parent] = mask;
}
void
mix_setrealdev(struct snd_mixer *m, u_int32_t dev, u_int32_t realdev)
{
if (m == NULL || dev >= SOUND_MIXER_NRDEVICES ||
!(realdev == SOUND_MIXER_NONE || realdev < SOUND_MIXER_NRDEVICES))
return;
m->realdev[dev] = realdev;
}
u_int32_t
mix_getparent(struct snd_mixer *m, u_int32_t dev)
{
if (m == NULL || dev >= SOUND_MIXER_NRDEVICES)
return SOUND_MIXER_NONE;
return m->parent[dev];
}
u_int32_t
mix_getchild(struct snd_mixer *m, u_int32_t dev)
{
if (m == NULL || dev >= SOUND_MIXER_NRDEVICES)
return 0;
return m->child[dev];
}
u_int32_t
mix_getdevs(struct snd_mixer *m)
{
return m->devs;
}
u_int32_t
mix_getrecdevs(struct snd_mixer *m)
{
return m->recdevs;
}
void *
mix_getdevinfo(struct snd_mixer *m)
{
return m->devinfo;
}
static struct snd_mixer *
mixer_obj_create(device_t dev, kobj_class_t cls, void *devinfo,
int type, const char *desc)
{
struct snd_mixer *m;
int i;
KASSERT(dev != NULL && cls != NULL && devinfo != NULL,
("%s(): NULL data dev=%p cls=%p devinfo=%p",
__func__, dev, cls, devinfo));
KASSERT(type == MIXER_TYPE_PRIMARY || type == MIXER_TYPE_SECONDARY,
("invalid mixer type=%d", type));
m = (struct snd_mixer *)kobj_create(cls, M_MIXER, M_WAITOK | M_ZERO);
snprintf(m->name, sizeof(m->name), "%s:mixer",
device_get_nameunit(dev));
if (desc != NULL) {
strlcat(m->name, ":", sizeof(m->name));
strlcat(m->name, desc, sizeof(m->name));
}
m->lock = snd_mtxcreate(m->name, (type == MIXER_TYPE_PRIMARY) ?
"primary pcm mixer" : "secondary pcm mixer");
m->type = type;
m->devinfo = devinfo;
m->busy = 0;
m->dev = dev;
for (i = 0; i < (sizeof(m->parent) / sizeof(m->parent[0])); i++) {
m->parent[i] = SOUND_MIXER_NONE;
m->child[i] = 0;
m->realdev[i] = i;
}
if (MIXER_INIT(m)) {
snd_mtxlock(m->lock);
snd_mtxfree(m->lock);
kobj_delete((kobj_t)m, M_MIXER);
return (NULL);
}
return (m);
}
int
mixer_delete(struct snd_mixer *m)
{
KASSERT(m != NULL, ("NULL snd_mixer"));
KASSERT(m->type == MIXER_TYPE_SECONDARY,
("%s(): illegal mixer type=%d", __func__, m->type));
/* mixer uninit can sleep --hps */
MIXER_UNINIT(m);
snd_mtxfree(m->lock);
kobj_delete((kobj_t)m, M_MIXER);
--mixer_count;
return (0);
}
struct snd_mixer *
mixer_create(device_t dev, kobj_class_t cls, void *devinfo, const char *desc)
{
struct snd_mixer *m;
m = mixer_obj_create(dev, cls, devinfo, MIXER_TYPE_SECONDARY, desc);
if (m != NULL)
++mixer_count;
return (m);
}
int
mixer_init(device_t dev, kobj_class_t cls, void *devinfo)
{
struct snddev_info *snddev;
struct snd_mixer *m;
u_int16_t v;
struct cdev *pdev;
int i, unit, devunit, val;
snddev = device_get_softc(dev);
if (snddev == NULL)
return (-1);
if (resource_int_value(device_get_name(dev),
device_get_unit(dev), "eq", &val) == 0 && val != 0) {
snddev->flags |= SD_F_EQ;
if ((val & SD_F_EQ_MASK) == val)
snddev->flags |= val;
else
snddev->flags |= SD_F_EQ_DEFAULT;
snddev->eqpreamp = 0;
}
m = mixer_obj_create(dev, cls, devinfo, MIXER_TYPE_PRIMARY, NULL);
if (m == NULL)
return (-1);
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
v = snd_mixerdefaults[i];
if (resource_int_value(device_get_name(dev),
device_get_unit(dev), snd_mixernames[i], &val) == 0) {
if (val >= 0 && val <= 100) {
v = (u_int16_t) val;
}
}
mixer_set(m, i, v | (v << 8));
}
mixer_setrecsrc(m, 0); /* Set default input. */
unit = device_get_unit(dev);
devunit = snd_mkunit(unit, SND_DEV_CTL, 0);
pdev = make_dev(&mixer_cdevsw, PCMMINOR(devunit),
UID_ROOT, GID_WHEEL, 0666, "mixer%d", unit);
pdev->si_drv1 = m;
snddev->mixer_dev = pdev;
++mixer_count;
if (bootverbose) {
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
if (!(m->devs & (1 << i)))
continue;
if (m->realdev[i] != i) {
device_printf(dev, "Mixer \"%s\" -> \"%s\":",
snd_mixernames[i],
(m->realdev[i] < SOUND_MIXER_NRDEVICES) ?
snd_mixernames[m->realdev[i]] : "none");
} else {
device_printf(dev, "Mixer \"%s\":",
snd_mixernames[i]);
}
if (m->parent[i] < SOUND_MIXER_NRDEVICES)
printf(" parent=\"%s\"",
snd_mixernames[m->parent[i]]);
if (m->child[i] != 0)
printf(" child=0x%08x", m->child[i]);
printf("\n");
}
if (snddev->flags & SD_F_SOFTPCMVOL)
device_printf(dev, "Soft PCM mixer ENABLED\n");
if (snddev->flags & SD_F_EQ)
device_printf(dev, "EQ Treble/Bass ENABLED\n");
}
return (0);
}
int
mixer_uninit(device_t dev)
{
int i;
struct snddev_info *d;
struct snd_mixer *m;
struct cdev *pdev;
d = device_get_softc(dev);
pdev = mixer_get_devt(dev);
if (d == NULL || pdev == NULL || pdev->si_drv1 == NULL)
return EBADF;
m = pdev->si_drv1;
KASSERT(m != NULL, ("NULL snd_mixer"));
KASSERT(m->type == MIXER_TYPE_PRIMARY,
("%s(): illegal mixer type=%d", __func__, m->type));
snd_mtxlock(m->lock);
if (m->busy) {
snd_mtxunlock(m->lock);
return EBUSY;
}
/* destroy dev can sleep --hps */
snd_mtxunlock(m->lock);
pdev->si_drv1 = NULL;
destroy_dev(pdev);
snd_mtxlock(m->lock);
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
mixer_set(m, i, 0);
mixer_setrecsrc(m, SOUND_MASK_MIC);
snd_mtxunlock(m->lock);
/* mixer uninit can sleep --hps */
MIXER_UNINIT(m);
snd_mtxfree(m->lock);
kobj_delete((kobj_t)m, M_MIXER);
d->mixer_dev = NULL;
--mixer_count;
return 0;
}
int
mixer_reinit(device_t dev)
{
struct snd_mixer *m;
struct cdev *pdev;
int i;
pdev = mixer_get_devt(dev);
m = pdev->si_drv1;
snd_mtxlock(m->lock);
i = MIXER_REINIT(m);
if (i) {
snd_mtxunlock(m->lock);
return i;
}
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
mixer_set(m, i, m->level[i]);
mixer_setrecsrc(m, m->recsrc);
snd_mtxunlock(m->lock);
return 0;
}
static int
sysctl_hw_snd_hwvol_mixer(SYSCTL_HANDLER_ARGS)
{
char devname[32];
int error, dev;
struct snd_mixer *m;
m = oidp->oid_arg1;
snd_mtxlock(m->lock);
strlcpy(devname, snd_mixernames[m->hwvol_mixer], sizeof(devname));
snd_mtxunlock(m->lock);
error = sysctl_handle_string(oidp, &devname[0], sizeof(devname), req);
snd_mtxlock(m->lock);
if (error == 0 && req->newptr != NULL) {
dev = mixer_lookup(devname);
if (dev == -1) {
snd_mtxunlock(m->lock);
return EINVAL;
}
else if (dev != m->hwvol_mixer) {
m->hwvol_mixer = dev;
m->hwvol_muted = 0;
}
}
snd_mtxunlock(m->lock);
return error;
}
int
mixer_hwvol_init(device_t dev)
{
struct snd_mixer *m;
struct cdev *pdev;
pdev = mixer_get_devt(dev);
m = pdev->si_drv1;
m->hwvol_mixer = SOUND_MIXER_VOLUME;
m->hwvol_step = 5;
SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "hwvol_step", CTLFLAG_RWTUN, &m->hwvol_step, 0, "");
SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "hwvol_mixer", CTLTYPE_STRING | CTLFLAG_RWTUN, m, 0,
sysctl_hw_snd_hwvol_mixer, "A", "");
return 0;
}
void
mixer_hwvol_mute_locked(struct snd_mixer *m)
{
if (m->hwvol_muted) {
m->hwvol_muted = 0;
mixer_set(m, m->hwvol_mixer, m->hwvol_mute_level);
} else {
m->hwvol_muted++;
m->hwvol_mute_level = mixer_get(m, m->hwvol_mixer);
mixer_set(m, m->hwvol_mixer, 0);
}
}
void
mixer_hwvol_mute(device_t dev)
{
struct snd_mixer *m;
struct cdev *pdev;
pdev = mixer_get_devt(dev);
m = pdev->si_drv1;
snd_mtxlock(m->lock);
mixer_hwvol_mute_locked(m);
snd_mtxunlock(m->lock);
}
void
mixer_hwvol_step_locked(struct snd_mixer *m, int left_step, int right_step)
{
int level, left, right;
if (m->hwvol_muted) {
m->hwvol_muted = 0;
level = m->hwvol_mute_level;
} else
level = mixer_get(m, m->hwvol_mixer);
if (level != -1) {
left = level & 0xff;
right = (level >> 8) & 0xff;
left += left_step * m->hwvol_step;
if (left < 0)
left = 0;
else if (left > 100)
left = 100;
right += right_step * m->hwvol_step;
if (right < 0)
right = 0;
else if (right > 100)
right = 100;
mixer_set(m, m->hwvol_mixer, left | right << 8);
}
}
void
mixer_hwvol_step(device_t dev, int left_step, int right_step)
{
struct snd_mixer *m;
struct cdev *pdev;
pdev = mixer_get_devt(dev);
m = pdev->si_drv1;
snd_mtxlock(m->lock);
mixer_hwvol_step_locked(m, left_step, right_step);
snd_mtxunlock(m->lock);
}
int
mixer_busy(struct snd_mixer *m)
{
KASSERT(m != NULL, ("NULL snd_mixer"));
return (m->busy);
}
int
mix_set(struct snd_mixer *m, u_int dev, u_int left, u_int right)
{
int ret;
KASSERT(m != NULL, ("NULL snd_mixer"));
snd_mtxlock(m->lock);
ret = mixer_set(m, dev, left | (right << 8));
snd_mtxunlock(m->lock);
return ((ret != 0) ? ENXIO : 0);
}
int
mix_get(struct snd_mixer *m, u_int dev)
{
int ret;
KASSERT(m != NULL, ("NULL snd_mixer"));
snd_mtxlock(m->lock);
ret = mixer_get(m, dev);
snd_mtxunlock(m->lock);
return (ret);
}
int
mix_setrecsrc(struct snd_mixer *m, u_int32_t src)
{
int ret;
KASSERT(m != NULL, ("NULL snd_mixer"));
snd_mtxlock(m->lock);
ret = mixer_setrecsrc(m, src);
snd_mtxunlock(m->lock);
return ((ret != 0) ? ENXIO : 0);
}
u_int32_t
mix_getrecsrc(struct snd_mixer *m)
{
u_int32_t ret;
KASSERT(m != NULL, ("NULL snd_mixer"));
snd_mtxlock(m->lock);
ret = mixer_getrecsrc(m);
snd_mtxunlock(m->lock);
return (ret);
}
int
mix_get_type(struct snd_mixer *m)
{
KASSERT(m != NULL, ("NULL snd_mixer"));
return (m->type);
}
/* ----------------------------------------------------------------------- */
static int
mixer_open(struct cdev *i_dev, int flags, int mode, struct thread *td)
{
struct snddev_info *d;
struct snd_mixer *m;
if (i_dev == NULL || i_dev->si_drv1 == NULL)
return (EBADF);
m = i_dev->si_drv1;
d = device_get_softc(m->dev);
if (!PCM_REGISTERED(d))
return (EBADF);
/* XXX Need Giant magic entry ??? */
snd_mtxlock(m->lock);
m->busy = 1;
snd_mtxunlock(m->lock);
return (0);
}
static int
mixer_close(struct cdev *i_dev, int flags, int mode, struct thread *td)
{
struct snddev_info *d;
struct snd_mixer *m;
int ret;
if (i_dev == NULL || i_dev->si_drv1 == NULL)
return (EBADF);
m = i_dev->si_drv1;
d = device_get_softc(m->dev);
if (!PCM_REGISTERED(d))
return (EBADF);
/* XXX Need Giant magic entry ??? */
snd_mtxlock(m->lock);
ret = (m->busy == 0) ? EBADF : 0;
m->busy = 0;
snd_mtxunlock(m->lock);
return (ret);
}
static int
mixer_ioctl_channel(struct cdev *dev, u_long cmd, caddr_t arg, int mode,
struct thread *td, int from)
{
struct snddev_info *d;
struct snd_mixer *m;
struct pcm_channel *c, *rdch, *wrch;
pid_t pid;
int j, ret;
if (td == NULL || td->td_proc == NULL)
return (-1);
m = dev->si_drv1;
d = device_get_softc(m->dev);
j = cmd & 0xff;
switch (j) {
case SOUND_MIXER_PCM:
case SOUND_MIXER_RECLEV:
case SOUND_MIXER_DEVMASK:
case SOUND_MIXER_CAPS:
case SOUND_MIXER_STEREODEVS:
break;
default:
return (-1);
break;
}
pid = td->td_proc->p_pid;
rdch = NULL;
wrch = NULL;
c = NULL;
ret = -1;
/*
* This is unfair. Imagine single proc opening multiple
* instances of same direction. What we do right now
* is looking for the first matching proc/pid, and just
* that. Nothing more. Consider it done.
*
* The better approach of controlling specific channel
* pcm or rec volume is by doing mixer ioctl
* (SNDCTL_DSP_[SET|GET][PLAY|REC]VOL / SOUND_MIXER_[PCM|RECLEV]
* on its open fd, rather than cracky mixer bypassing here.
*/
CHN_FOREACH(c, d, channels.pcm.opened) {
CHN_LOCK(c);
if (c->pid != pid ||
!(c->feederflags & (1 << FEEDER_VOLUME))) {
CHN_UNLOCK(c);
continue;
}
if (rdch == NULL && c->direction == PCMDIR_REC) {
rdch = c;
if (j == SOUND_MIXER_RECLEV)
goto mixer_ioctl_channel_proc;
} else if (wrch == NULL && c->direction == PCMDIR_PLAY) {
wrch = c;
if (j == SOUND_MIXER_PCM)
goto mixer_ioctl_channel_proc;
}
CHN_UNLOCK(c);
if (rdch != NULL && wrch != NULL)
break;
}
if (rdch == NULL && wrch == NULL)
return (-1);
if ((j == SOUND_MIXER_DEVMASK || j == SOUND_MIXER_CAPS ||
j == SOUND_MIXER_STEREODEVS) &&
(cmd & ~0xff) == MIXER_READ(0)) {
snd_mtxlock(m->lock);
*(int *)arg = mix_getdevs(m);
snd_mtxunlock(m->lock);
if (rdch != NULL)
*(int *)arg |= SOUND_MASK_RECLEV;
if (wrch != NULL)
*(int *)arg |= SOUND_MASK_PCM;
ret = 0;
}
return (ret);
mixer_ioctl_channel_proc:
KASSERT(c != NULL, ("%s(): NULL channel", __func__));
CHN_LOCKASSERT(c);
if ((cmd & ~0xff) == MIXER_WRITE(0)) {
int left, right, center;
left = *(int *)arg & 0x7f;
right = (*(int *)arg >> 8) & 0x7f;
center = (left + right) >> 1;
chn_setvolume_multi(c, SND_VOL_C_PCM, left, right, center);
} else if ((cmd & ~0xff) == MIXER_READ(0)) {
*(int *)arg = CHN_GETVOLUME(c, SND_VOL_C_PCM, SND_CHN_T_FL);
*(int *)arg |=
CHN_GETVOLUME(c, SND_VOL_C_PCM, SND_CHN_T_FR) << 8;
}
CHN_UNLOCK(c);
return (0);
}
static int
mixer_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
struct thread *td)
{
struct snddev_info *d;
int ret;
if (i_dev == NULL || i_dev->si_drv1 == NULL)
return (EBADF);
d = device_get_softc(((struct snd_mixer *)i_dev->si_drv1)->dev);
if (!PCM_REGISTERED(d))
return (EBADF);
PCM_GIANT_ENTER(d);
PCM_ACQUIRE_QUICK(d);
ret = -1;
if (mixer_bypass != 0 && (d->flags & SD_F_VPC))
ret = mixer_ioctl_channel(i_dev, cmd, arg, mode, td,
MIXER_CMD_CDEV);
if (ret == -1)
ret = mixer_ioctl_cmd(i_dev, cmd, arg, mode, td,
MIXER_CMD_CDEV);
PCM_RELEASE_QUICK(d);
PCM_GIANT_LEAVE(d);
return (ret);
}
static void
mixer_mixerinfo(struct snd_mixer *m, mixer_info *mi)
{
bzero((void *)mi, sizeof(*mi));
strlcpy(mi->id, m->name, sizeof(mi->id));
strlcpy(mi->name, device_get_desc(m->dev), sizeof(mi->name));
mi->modify_counter = m->modify_counter;
}
/*
* XXX Make sure you can guarantee concurrency safety before calling this
* function, be it through Giant, PCM_*, etc !
*/
int
mixer_ioctl_cmd(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
struct thread *td, int from)
{
struct snd_mixer *m;
int ret = EINVAL, *arg_i = (int *)arg;
int v = -1, j = cmd & 0xff;
/*
* Certain ioctls may be made on any type of device (audio, mixer,
* and MIDI). Handle those special cases here.
*/
if (IOCGROUP(cmd) == 'X') {
switch (cmd) {
case SNDCTL_SYSINFO:
sound_oss_sysinfo((oss_sysinfo *)arg);
return (0);
case SNDCTL_CARDINFO:
return (sound_oss_card_info((oss_card_info *)arg));
case SNDCTL_AUDIOINFO:
case SNDCTL_AUDIOINFO_EX:
case SNDCTL_ENGINEINFO:
return (dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg));
case SNDCTL_MIXERINFO:
return (mixer_oss_mixerinfo(i_dev, (oss_mixerinfo *)arg));
}
return (EINVAL);
}
m = i_dev->si_drv1;
if (m == NULL)
return (EBADF);
snd_mtxlock(m->lock);
if (from == MIXER_CMD_CDEV && !m->busy) {
snd_mtxunlock(m->lock);
return (EBADF);
}
switch (cmd) {
case SNDCTL_DSP_GET_RECSRC_NAMES:
bcopy((void *)&m->enuminfo, arg, sizeof(oss_mixer_enuminfo));
ret = 0;
goto done;
case SNDCTL_DSP_GET_RECSRC:
ret = mixer_get_recroute(m, arg_i);
goto done;
case SNDCTL_DSP_SET_RECSRC:
ret = mixer_set_recroute(m, *arg_i);
goto done;
case OSS_GETVERSION:
*arg_i = SOUND_VERSION;
ret = 0;
goto done;
case SOUND_MIXER_INFO:
mixer_mixerinfo(m, (mixer_info *)arg);
ret = 0;
goto done;
}
if ((cmd & ~0xff) == MIXER_WRITE(0)) {
if (j == SOUND_MIXER_RECSRC)
ret = mixer_setrecsrc(m, *arg_i);
else
ret = mixer_set(m, j, *arg_i);
snd_mtxunlock(m->lock);
return ((ret == 0) ? 0 : ENXIO);
}
if ((cmd & ~0xff) == MIXER_READ(0)) {
switch (j) {
case SOUND_MIXER_DEVMASK:
case SOUND_MIXER_CAPS:
case SOUND_MIXER_STEREODEVS:
v = mix_getdevs(m);
break;
case SOUND_MIXER_RECMASK:
v = mix_getrecdevs(m);
break;
case SOUND_MIXER_RECSRC:
v = mixer_getrecsrc(m);
break;
default:
v = mixer_get(m, j);
}
*arg_i = v;
snd_mtxunlock(m->lock);
return ((v != -1) ? 0 : ENXIO);
}
done:
snd_mtxunlock(m->lock);
return (ret);
}
static void
mixer_clone(void *arg,
struct ucred *cred,
char *name, int namelen, struct cdev **dev)
{
struct snddev_info *d;
if (*dev != NULL)
return;
if (strcmp(name, "mixer") == 0) {
d = devclass_get_softc(pcm_devclass, snd_unit);
if (PCM_REGISTERED(d) && d->mixer_dev != NULL) {
*dev = d->mixer_dev;
dev_ref(*dev);
}
}
}
static void
mixer_sysinit(void *p)
{
if (mixer_ehtag != NULL)
return;
mixer_ehtag = EVENTHANDLER_REGISTER(dev_clone, mixer_clone, 0, 1000);
}
static void
mixer_sysuninit(void *p)
{
if (mixer_ehtag == NULL)
return;
EVENTHANDLER_DEREGISTER(dev_clone, mixer_ehtag);
mixer_ehtag = NULL;
}
SYSINIT(mixer_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, mixer_sysinit, NULL);
SYSUNINIT(mixer_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, mixer_sysuninit, NULL);
/**
* @brief Handler for SNDCTL_MIXERINFO
*
* This function searches for a mixer based on the numeric ID stored
* in oss_miserinfo::dev. If set to -1, then information about the
* current mixer handling the request is provided. Note, however, that
* this ioctl may be made with any sound device (audio, mixer, midi).
*
* @note Caller must not hold any PCM device, channel, or mixer locks.
*
* See http://manuals.opensound.com/developer/SNDCTL_MIXERINFO.html for
* more information.
*
* @param i_dev character device on which the ioctl arrived
* @param arg user argument (oss_mixerinfo *)
*
* @retval EINVAL oss_mixerinfo::dev specified a bad value
* @retval 0 success
*/
int
mixer_oss_mixerinfo(struct cdev *i_dev, oss_mixerinfo *mi)
{
struct snddev_info *d;
struct snd_mixer *m;
int nmix, i;
/*
* If probing the device handling the ioctl, make sure it's a mixer
* device. (This ioctl is valid on audio, mixer, and midi devices.)
*/
if (mi->dev == -1 && i_dev->si_devsw != &mixer_cdevsw)
return (EINVAL);
d = NULL;
m = NULL;
nmix = 0;
/*
* There's a 1:1 relationship between mixers and PCM devices, so
* begin by iterating over PCM devices and search for our mixer.
*/
for (i = 0; pcm_devclass != NULL &&
i < devclass_get_maxunit(pcm_devclass); i++) {
d = devclass_get_softc(pcm_devclass, i);
if (!PCM_REGISTERED(d))
continue;
/* XXX Need Giant magic entry */
/* See the note in function docblock. */
PCM_UNLOCKASSERT(d);
PCM_LOCK(d);
if (d->mixer_dev != NULL && d->mixer_dev->si_drv1 != NULL &&
((mi->dev == -1 && d->mixer_dev == i_dev) ||
mi->dev == nmix)) {
m = d->mixer_dev->si_drv1;
mtx_lock(m->lock);
/*
* At this point, the following synchronization stuff
* has happened:
* - a specific PCM device is locked.
* - a specific mixer device has been locked, so be
* sure to unlock when existing.
*/
bzero((void *)mi, sizeof(*mi));
mi->dev = nmix;
snprintf(mi->id, sizeof(mi->id), "mixer%d", i);
strlcpy(mi->name, m->name, sizeof(mi->name));
mi->modify_counter = m->modify_counter;
mi->card_number = i;
/*
* Currently, FreeBSD assumes 1:1 relationship between
* a pcm and mixer devices, so this is hardcoded to 0.
*/
mi->port_number = 0;
/**
* @todo Fill in @sa oss_mixerinfo::mixerhandle.
* @note From 4Front: "mixerhandle is an arbitrary
* string that identifies the mixer better than
* the device number (mixerinfo.dev). Device
* numbers may change depending on the order the
* drivers are loaded. However the handle should
* remain the same provided that the sound card
* is not moved to another PCI slot."
*/
/**
* @note
* @sa oss_mixerinfo::magic is a reserved field.
*
* @par
* From 4Front: "magic is usually 0. However some
* devices may have dedicated setup utilities and the
* magic field may contain an unique driver specific
* value (managed by [4Front])."
*/
mi->enabled = device_is_attached(m->dev) ? 1 : 0;
/**
* The only flag for @sa oss_mixerinfo::caps is
* currently MIXER_CAP_VIRTUAL, which I'm not sure we
* really worry about.
*/
/**
* Mixer extensions currently aren't supported, so
* leave @sa oss_mixerinfo::nrext blank for now.
*/
/**
* @todo Fill in @sa oss_mixerinfo::priority (requires
* touching drivers?)
* @note The priority field is for mixer applets to
* determine which mixer should be the default, with 0
* being least preferred and 10 being most preferred.
* From 4Front: "OSS drivers like ICH use higher
* values (10) because such chips are known to be used
* only on motherboards. Drivers for high end pro
* devices use 0 because they will never be the
* default mixer. Other devices use values 1 to 9
* depending on the estimated probability of being the
* default device.
*
* XXX Described by Hannu@4Front, but not found in
* soundcard.h.
strlcpy(mi->devnode, devtoname(d->mixer_dev),
sizeof(mi->devnode));
mi->legacy_device = i;
*/
mtx_unlock(m->lock);
} else
++nmix;
PCM_UNLOCK(d);
if (m != NULL)
return (0);
}
return (EINVAL);
}
/*
* Allow the sound driver to use the mixer lock to protect its mixer
* data:
*/
struct mtx *
mixer_get_lock(struct snd_mixer *m)
{
if (m->lock == NULL) {
return (&Giant);
}
return (m->lock);
}
int
mix_get_locked(struct snd_mixer *m, u_int dev, int *pleft, int *pright)
{
int level;
level = mixer_get(m, dev);
if (level < 0) {
*pright = *pleft = -1;
return (-1);
}
*pleft = level & 0xFF;
*pright = (level >> 8) & 0xFF;
return (0);
}
int
mix_set_locked(struct snd_mixer *m, u_int dev, int left, int right)
{
int level;
level = (left & 0xFF) | ((right & 0xFF) << 8);
return (mixer_set(m, dev, level));
}
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