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linux-stable/sound/core/oss/mixer_oss.c
Pavel Skripkin 3ab7992018 ALSA: mixer: fix deadlock in snd_mixer_oss_set_volume 
In commit 411cef6adf ("ALSA: mixer: oss: Fix racy access to slots")
added mutex protection in snd_mixer_oss_set_volume(). Second
mutex_lock() in same function looks like typo, fix it.

Reported-by: syzbot+ace149a75a9a0a399ac7@syzkaller.appspotmail.com
Fixes: 411cef6adf ("ALSA: mixer: oss: Fix racy access to slots")
Cc: <stable@vger.kernel.org>
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Link: https://lore.kernel.org/r/20211024140315.16704-1-paskripkin@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-10-26 07:59:40 +02:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* OSS emulation layer for the mixer interface
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
*/
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/string.h>
#include <linux/module.h>
#include <linux/compat.h>
#include <sound/core.h>
#include <sound/minors.h>
#include <sound/control.h>
#include <sound/info.h>
#include <sound/mixer_oss.h>
#include <linux/soundcard.h>
#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("Mixer OSS emulation for ALSA.");
MODULE_LICENSE("GPL");
MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MIXER);
static int snd_mixer_oss_open(struct inode *inode, struct file *file)
{
struct snd_card *card;
struct snd_mixer_oss_file *fmixer;
int err;
err = nonseekable_open(inode, file);
if (err < 0)
return err;
card = snd_lookup_oss_minor_data(iminor(inode),
SNDRV_OSS_DEVICE_TYPE_MIXER);
if (card == NULL)
return -ENODEV;
if (card->mixer_oss == NULL) {
snd_card_unref(card);
return -ENODEV;
}
err = snd_card_file_add(card, file);
if (err < 0) {
snd_card_unref(card);
return err;
}
fmixer = kzalloc(sizeof(*fmixer), GFP_KERNEL);
if (fmixer == NULL) {
snd_card_file_remove(card, file);
snd_card_unref(card);
return -ENOMEM;
}
fmixer->card = card;
fmixer->mixer = card->mixer_oss;
file->private_data = fmixer;
if (!try_module_get(card->module)) {
kfree(fmixer);
snd_card_file_remove(card, file);
snd_card_unref(card);
return -EFAULT;
}
snd_card_unref(card);
return 0;
}
static int snd_mixer_oss_release(struct inode *inode, struct file *file)
{
struct snd_mixer_oss_file *fmixer;
if (file->private_data) {
fmixer = file->private_data;
module_put(fmixer->card->module);
snd_card_file_remove(fmixer->card, file);
kfree(fmixer);
}
return 0;
}
static int snd_mixer_oss_info(struct snd_mixer_oss_file *fmixer,
mixer_info __user *_info)
{
struct snd_card *card = fmixer->card;
struct snd_mixer_oss *mixer = fmixer->mixer;
struct mixer_info info;
memset(&info, 0, sizeof(info));
strscpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id));
strscpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name));
info.modify_counter = card->mixer_oss_change_count;
if (copy_to_user(_info, &info, sizeof(info)))
return -EFAULT;
return 0;
}
static int snd_mixer_oss_info_obsolete(struct snd_mixer_oss_file *fmixer,
_old_mixer_info __user *_info)
{
struct snd_card *card = fmixer->card;
struct snd_mixer_oss *mixer = fmixer->mixer;
_old_mixer_info info;
memset(&info, 0, sizeof(info));
strscpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id));
strscpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name));
if (copy_to_user(_info, &info, sizeof(info)))
return -EFAULT;
return 0;
}
static int snd_mixer_oss_caps(struct snd_mixer_oss_file *fmixer)
{
struct snd_mixer_oss *mixer = fmixer->mixer;
int result = 0;
if (mixer == NULL)
return -EIO;
if (mixer->get_recsrc && mixer->put_recsrc)
result |= SOUND_CAP_EXCL_INPUT;
return result;
}
static int snd_mixer_oss_devmask(struct snd_mixer_oss_file *fmixer)
{
struct snd_mixer_oss *mixer = fmixer->mixer;
struct snd_mixer_oss_slot *pslot;
int result = 0, chn;
if (mixer == NULL)
return -EIO;
mutex_lock(&mixer->reg_mutex);
for (chn = 0; chn < 31; chn++) {
pslot = &mixer->slots[chn];
if (pslot->put_volume || pslot->put_recsrc)
result |= 1 << chn;
}
mutex_unlock(&mixer->reg_mutex);
return result;
}
static int snd_mixer_oss_stereodevs(struct snd_mixer_oss_file *fmixer)
{
struct snd_mixer_oss *mixer = fmixer->mixer;
struct snd_mixer_oss_slot *pslot;
int result = 0, chn;
if (mixer == NULL)
return -EIO;
mutex_lock(&mixer->reg_mutex);
for (chn = 0; chn < 31; chn++) {
pslot = &mixer->slots[chn];
if (pslot->put_volume && pslot->stereo)
result |= 1 << chn;
}
mutex_unlock(&mixer->reg_mutex);
return result;
}
static int snd_mixer_oss_recmask(struct snd_mixer_oss_file *fmixer)
{
struct snd_mixer_oss *mixer = fmixer->mixer;
int result = 0;
if (mixer == NULL)
return -EIO;
mutex_lock(&mixer->reg_mutex);
if (mixer->put_recsrc && mixer->get_recsrc) { /* exclusive */
result = mixer->mask_recsrc;
} else {
struct snd_mixer_oss_slot *pslot;
int chn;
for (chn = 0; chn < 31; chn++) {
pslot = &mixer->slots[chn];
if (pslot->put_recsrc)
result |= 1 << chn;
}
}
mutex_unlock(&mixer->reg_mutex);
return result;
}
static int snd_mixer_oss_get_recsrc(struct snd_mixer_oss_file *fmixer)
{
struct snd_mixer_oss *mixer = fmixer->mixer;
int result = 0;
if (mixer == NULL)
return -EIO;
mutex_lock(&mixer->reg_mutex);
if (mixer->put_recsrc && mixer->get_recsrc) { /* exclusive */
unsigned int index;
result = mixer->get_recsrc(fmixer, &index);
if (result < 0)
goto unlock;
result = 1 << index;
} else {
struct snd_mixer_oss_slot *pslot;
int chn;
for (chn = 0; chn < 31; chn++) {
pslot = &mixer->slots[chn];
if (pslot->get_recsrc) {
int active = 0;
pslot->get_recsrc(fmixer, pslot, &active);
if (active)
result |= 1 << chn;
}
}
}
mixer->oss_recsrc = result;
unlock:
mutex_unlock(&mixer->reg_mutex);
return result;
}
static int snd_mixer_oss_set_recsrc(struct snd_mixer_oss_file *fmixer, int recsrc)
{
struct snd_mixer_oss *mixer = fmixer->mixer;
struct snd_mixer_oss_slot *pslot;
int chn, active;
unsigned int index;
int result = 0;
if (mixer == NULL)
return -EIO;
mutex_lock(&mixer->reg_mutex);
if (mixer->get_recsrc && mixer->put_recsrc) { /* exclusive input */
if (recsrc & ~mixer->oss_recsrc)
recsrc &= ~mixer->oss_recsrc;
mixer->put_recsrc(fmixer, ffz(~recsrc));
mixer->get_recsrc(fmixer, &index);
result = 1 << index;
}
for (chn = 0; chn < 31; chn++) {
pslot = &mixer->slots[chn];
if (pslot->put_recsrc) {
active = (recsrc & (1 << chn)) ? 1 : 0;
pslot->put_recsrc(fmixer, pslot, active);
}
}
if (! result) {
for (chn = 0; chn < 31; chn++) {
pslot = &mixer->slots[chn];
if (pslot->get_recsrc) {
active = 0;
pslot->get_recsrc(fmixer, pslot, &active);
if (active)
result |= 1 << chn;
}
}
}
mutex_unlock(&mixer->reg_mutex);
return result;
}
static int snd_mixer_oss_get_volume(struct snd_mixer_oss_file *fmixer, int slot)
{
struct snd_mixer_oss *mixer = fmixer->mixer;
struct snd_mixer_oss_slot *pslot;
int result = 0, left, right;
if (mixer == NULL || slot > 30)
return -EIO;
mutex_lock(&mixer->reg_mutex);
pslot = &mixer->slots[slot];
left = pslot->volume[0];
right = pslot->volume[1];
if (pslot->get_volume)
result = pslot->get_volume(fmixer, pslot, &left, &right);
if (!pslot->stereo)
right = left;
if (snd_BUG_ON(left < 0 || left > 100)) {
result = -EIO;
goto unlock;
}
if (snd_BUG_ON(right < 0 || right > 100)) {
result = -EIO;
goto unlock;
}
if (result >= 0) {
pslot->volume[0] = left;
pslot->volume[1] = right;
result = (left & 0xff) | ((right & 0xff) << 8);
}
unlock:
mutex_unlock(&mixer->reg_mutex);
return result;
}
static int snd_mixer_oss_set_volume(struct snd_mixer_oss_file *fmixer,
int slot, int volume)
{
struct snd_mixer_oss *mixer = fmixer->mixer;
struct snd_mixer_oss_slot *pslot;
int result = 0, left = volume & 0xff, right = (volume >> 8) & 0xff;
if (mixer == NULL || slot > 30)
return -EIO;
mutex_lock(&mixer->reg_mutex);
pslot = &mixer->slots[slot];
if (left > 100)
left = 100;
if (right > 100)
right = 100;
if (!pslot->stereo)
right = left;
if (pslot->put_volume)
result = pslot->put_volume(fmixer, pslot, left, right);
if (result < 0)
goto unlock;
pslot->volume[0] = left;
pslot->volume[1] = right;
result = (left & 0xff) | ((right & 0xff) << 8);
unlock:
mutex_unlock(&mixer->reg_mutex);
return result;
}
static int snd_mixer_oss_ioctl1(struct snd_mixer_oss_file *fmixer, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
int tmp;
if (snd_BUG_ON(!fmixer))
return -ENXIO;
if (((cmd >> 8) & 0xff) == 'M') {
switch (cmd) {
case SOUND_MIXER_INFO:
return snd_mixer_oss_info(fmixer, argp);
case SOUND_OLD_MIXER_INFO:
return snd_mixer_oss_info_obsolete(fmixer, argp);
case SOUND_MIXER_WRITE_RECSRC:
if (get_user(tmp, p))
return -EFAULT;
tmp = snd_mixer_oss_set_recsrc(fmixer, tmp);
if (tmp < 0)
return tmp;
return put_user(tmp, p);
case OSS_GETVERSION:
return put_user(SNDRV_OSS_VERSION, p);
case OSS_ALSAEMULVER:
return put_user(1, p);
case SOUND_MIXER_READ_DEVMASK:
tmp = snd_mixer_oss_devmask(fmixer);
if (tmp < 0)
return tmp;
return put_user(tmp, p);
case SOUND_MIXER_READ_STEREODEVS:
tmp = snd_mixer_oss_stereodevs(fmixer);
if (tmp < 0)
return tmp;
return put_user(tmp, p);
case SOUND_MIXER_READ_RECMASK:
tmp = snd_mixer_oss_recmask(fmixer);
if (tmp < 0)
return tmp;
return put_user(tmp, p);
case SOUND_MIXER_READ_CAPS:
tmp = snd_mixer_oss_caps(fmixer);
if (tmp < 0)
return tmp;
return put_user(tmp, p);
case SOUND_MIXER_READ_RECSRC:
tmp = snd_mixer_oss_get_recsrc(fmixer);
if (tmp < 0)
return tmp;
return put_user(tmp, p);
}
}
if (cmd & SIOC_IN) {
if (get_user(tmp, p))
return -EFAULT;
tmp = snd_mixer_oss_set_volume(fmixer, cmd & 0xff, tmp);
if (tmp < 0)
return tmp;
return put_user(tmp, p);
} else if (cmd & SIOC_OUT) {
tmp = snd_mixer_oss_get_volume(fmixer, cmd & 0xff);
if (tmp < 0)
return tmp;
return put_user(tmp, p);
}
return -ENXIO;
}
static long snd_mixer_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
return snd_mixer_oss_ioctl1(file->private_data, cmd, arg);
}
int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg)
{
struct snd_mixer_oss_file fmixer;
if (snd_BUG_ON(!card))
return -ENXIO;
if (card->mixer_oss == NULL)
return -ENXIO;
memset(&fmixer, 0, sizeof(fmixer));
fmixer.card = card;
fmixer.mixer = card->mixer_oss;
return snd_mixer_oss_ioctl1(&fmixer, cmd, arg);
}
EXPORT_SYMBOL(snd_mixer_oss_ioctl_card);
#ifdef CONFIG_COMPAT
/* all compatible */
static long snd_mixer_oss_ioctl_compat(struct file *file, unsigned int cmd,
unsigned long arg)
{
return snd_mixer_oss_ioctl1(file->private_data, cmd,
(unsigned long)compat_ptr(arg));
}
#else
#define snd_mixer_oss_ioctl_compat NULL
#endif
/*
* REGISTRATION PART
*/
static const struct file_operations snd_mixer_oss_f_ops =
{
.owner = THIS_MODULE,
.open = snd_mixer_oss_open,
.release = snd_mixer_oss_release,
.llseek = no_llseek,
.unlocked_ioctl = snd_mixer_oss_ioctl,
.compat_ioctl = snd_mixer_oss_ioctl_compat,
};
/*
* utilities
*/
static long snd_mixer_oss_conv(long val, long omin, long omax, long nmin, long nmax)
{
long orange = omax - omin, nrange = nmax - nmin;
if (orange == 0)
return 0;
return DIV_ROUND_CLOSEST(nrange * (val - omin), orange) + nmin;
}
/* convert from alsa native to oss values (0-100) */
static long snd_mixer_oss_conv1(long val, long min, long max, int *old)
{
if (val == snd_mixer_oss_conv(*old, 0, 100, min, max))
return *old;
return snd_mixer_oss_conv(val, min, max, 0, 100);
}
/* convert from oss to alsa native values */
static long snd_mixer_oss_conv2(long val, long min, long max)
{
return snd_mixer_oss_conv(val, 0, 100, min, max);
}
#if 0
static void snd_mixer_oss_recsrce_set(struct snd_card *card, int slot)
{
struct snd_mixer_oss *mixer = card->mixer_oss;
if (mixer)
mixer->mask_recsrc |= 1 << slot;
}
static int snd_mixer_oss_recsrce_get(struct snd_card *card, int slot)
{
struct snd_mixer_oss *mixer = card->mixer_oss;
if (mixer && (mixer->mask_recsrc & (1 << slot)))
return 1;
return 0;
}
#endif
#define SNDRV_MIXER_OSS_SIGNATURE 0x65999250
#define SNDRV_MIXER_OSS_ITEM_GLOBAL 0
#define SNDRV_MIXER_OSS_ITEM_GSWITCH 1
#define SNDRV_MIXER_OSS_ITEM_GROUTE 2
#define SNDRV_MIXER_OSS_ITEM_GVOLUME 3
#define SNDRV_MIXER_OSS_ITEM_PSWITCH 4
#define SNDRV_MIXER_OSS_ITEM_PROUTE 5
#define SNDRV_MIXER_OSS_ITEM_PVOLUME 6
#define SNDRV_MIXER_OSS_ITEM_CSWITCH 7
#define SNDRV_MIXER_OSS_ITEM_CROUTE 8
#define SNDRV_MIXER_OSS_ITEM_CVOLUME 9
#define SNDRV_MIXER_OSS_ITEM_CAPTURE 10
#define SNDRV_MIXER_OSS_ITEM_COUNT 11
#define SNDRV_MIXER_OSS_PRESENT_GLOBAL (1<<0)
#define SNDRV_MIXER_OSS_PRESENT_GSWITCH (1<<1)
#define SNDRV_MIXER_OSS_PRESENT_GROUTE (1<<2)
#define SNDRV_MIXER_OSS_PRESENT_GVOLUME (1<<3)
#define SNDRV_MIXER_OSS_PRESENT_PSWITCH (1<<4)
#define SNDRV_MIXER_OSS_PRESENT_PROUTE (1<<5)
#define SNDRV_MIXER_OSS_PRESENT_PVOLUME (1<<6)
#define SNDRV_MIXER_OSS_PRESENT_CSWITCH (1<<7)
#define SNDRV_MIXER_OSS_PRESENT_CROUTE (1<<8)
#define SNDRV_MIXER_OSS_PRESENT_CVOLUME (1<<9)
#define SNDRV_MIXER_OSS_PRESENT_CAPTURE (1<<10)
struct slot {
unsigned int signature;
unsigned int present;
unsigned int channels;
unsigned int numid[SNDRV_MIXER_OSS_ITEM_COUNT];
unsigned int capture_item;
const struct snd_mixer_oss_assign_table *assigned;
unsigned int allocated: 1;
};
#define ID_UNKNOWN ((unsigned int)-1)
static struct snd_kcontrol *snd_mixer_oss_test_id(struct snd_mixer_oss *mixer, const char *name, int index)
{
struct snd_card *card = mixer->card;
struct snd_ctl_elem_id id;
memset(&id, 0, sizeof(id));
id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
strscpy(id.name, name, sizeof(id.name));
id.index = index;
return snd_ctl_find_id(card, &id);
}
static void snd_mixer_oss_get_volume1_vol(struct snd_mixer_oss_file *fmixer,
struct snd_mixer_oss_slot *pslot,
unsigned int numid,
int *left, int *right)
{
struct snd_ctl_elem_info *uinfo;
struct snd_ctl_elem_value *uctl;
struct snd_kcontrol *kctl;
struct snd_card *card = fmixer->card;
if (numid == ID_UNKNOWN)
return;
down_read(&card->controls_rwsem);
kctl = snd_ctl_find_numid(card, numid);
if (!kctl) {
up_read(&card->controls_rwsem);
return;
}
uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
if (uinfo == NULL || uctl == NULL)
goto __unalloc;
if (kctl->info(kctl, uinfo))
goto __unalloc;
if (kctl->get(kctl, uctl))
goto __unalloc;
if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
goto __unalloc;
*left = snd_mixer_oss_conv1(uctl->value.integer.value[0], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[0]);
if (uinfo->count > 1)
*right = snd_mixer_oss_conv1(uctl->value.integer.value[1], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[1]);
__unalloc:
up_read(&card->controls_rwsem);
kfree(uctl);
kfree(uinfo);
}
static void snd_mixer_oss_get_volume1_sw(struct snd_mixer_oss_file *fmixer,
struct snd_mixer_oss_slot *pslot,
unsigned int numid,
int *left, int *right,
int route)
{
struct snd_ctl_elem_info *uinfo;
struct snd_ctl_elem_value *uctl;
struct snd_kcontrol *kctl;
struct snd_card *card = fmixer->card;
if (numid == ID_UNKNOWN)
return;
down_read(&card->controls_rwsem);
kctl = snd_ctl_find_numid(card, numid);
if (!kctl) {
up_read(&card->controls_rwsem);
return;
}
uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
if (uinfo == NULL || uctl == NULL)
goto __unalloc;
if (kctl->info(kctl, uinfo))
goto __unalloc;
if (kctl->get(kctl, uctl))
goto __unalloc;
if (!uctl->value.integer.value[0]) {
*left = 0;
if (uinfo->count == 1)
*right = 0;
}
if (uinfo->count > 1 && !uctl->value.integer.value[route ? 3 : 1])
*right = 0;
__unalloc:
up_read(&card->controls_rwsem);
kfree(uctl);
kfree(uinfo);
}
static int snd_mixer_oss_get_volume1(struct snd_mixer_oss_file *fmixer,
struct snd_mixer_oss_slot *pslot,
int *left, int *right)
{
struct slot *slot = pslot->private_data;
*left = *right = 100;
if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
} else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
} else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
}
if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
} else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
} else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
} else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
}
return 0;
}
static void snd_mixer_oss_put_volume1_vol(struct snd_mixer_oss_file *fmixer,
struct snd_mixer_oss_slot *pslot,
unsigned int numid,
int left, int right)
{
struct snd_ctl_elem_info *uinfo;
struct snd_ctl_elem_value *uctl;
struct snd_kcontrol *kctl;
struct snd_card *card = fmixer->card;
int res;
if (numid == ID_UNKNOWN)
return;
down_read(&card->controls_rwsem);
kctl = snd_ctl_find_numid(card, numid);
if (!kctl) {
up_read(&card->controls_rwsem);
return;
}
uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
if (uinfo == NULL || uctl == NULL)
goto __unalloc;
if (kctl->info(kctl, uinfo))
goto __unalloc;
if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
goto __unalloc;
uctl->value.integer.value[0] = snd_mixer_oss_conv2(left, uinfo->value.integer.min, uinfo->value.integer.max);
if (uinfo->count > 1)
uctl->value.integer.value[1] = snd_mixer_oss_conv2(right, uinfo->value.integer.min, uinfo->value.integer.max);
res = kctl->put(kctl, uctl);
if (res < 0)
goto __unalloc;
if (res > 0)
snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
__unalloc:
up_read(&card->controls_rwsem);
kfree(uctl);
kfree(uinfo);
}
static void snd_mixer_oss_put_volume1_sw(struct snd_mixer_oss_file *fmixer,
struct snd_mixer_oss_slot *pslot,
unsigned int numid,
int left, int right,
int route)
{
struct snd_ctl_elem_info *uinfo;
struct snd_ctl_elem_value *uctl;
struct snd_kcontrol *kctl;
struct snd_card *card = fmixer->card;
int res;
if (numid == ID_UNKNOWN)
return;
down_read(&card->controls_rwsem);
kctl = snd_ctl_find_numid(card, numid);
if (!kctl) {
up_read(&card->controls_rwsem);
return;
}
uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
if (uinfo == NULL || uctl == NULL)
goto __unalloc;
if (kctl->info(kctl, uinfo))
goto __unalloc;
if (uinfo->count > 1) {
uctl->value.integer.value[0] = left > 0 ? 1 : 0;
uctl->value.integer.value[route ? 3 : 1] = right > 0 ? 1 : 0;
if (route) {
uctl->value.integer.value[1] =
uctl->value.integer.value[2] = 0;
}
} else {
uctl->value.integer.value[0] = (left > 0 || right > 0) ? 1 : 0;
}
res = kctl->put(kctl, uctl);
if (res < 0)
goto __unalloc;
if (res > 0)
snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
__unalloc:
up_read(&card->controls_rwsem);
kfree(uctl);
kfree(uinfo);
}
static int snd_mixer_oss_put_volume1(struct snd_mixer_oss_file *fmixer,
struct snd_mixer_oss_slot *pslot,
int left, int right)
{
struct slot *slot = pslot->private_data;
if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME)
snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
} else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) {
snd_mixer_oss_put_volume1_vol(fmixer, pslot,
slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
} else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
} else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
}
if (left || right) {
if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH)
snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH)
snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH)
snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE)
snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE)
snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE)
snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
} else {
if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
} else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
} else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
} else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
} else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
} else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
}
}
return 0;
}
static int snd_mixer_oss_get_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
struct snd_mixer_oss_slot *pslot,
int *active)
{
struct slot *slot = pslot->private_data;
int left, right;
left = right = 1;
snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], &left, &right, 0);
*active = (left || right) ? 1 : 0;
return 0;
}
static int snd_mixer_oss_get_recsrc1_route(struct snd_mixer_oss_file *fmixer,
struct snd_mixer_oss_slot *pslot,
int *active)
{
struct slot *slot = pslot->private_data;
int left, right;
left = right = 1;
snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], &left, &right, 1);
*active = (left || right) ? 1 : 0;
return 0;
}
static int snd_mixer_oss_put_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
struct snd_mixer_oss_slot *pslot,
int active)
{
struct slot *slot = pslot->private_data;
snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], active, active, 0);
return 0;
}
static int snd_mixer_oss_put_recsrc1_route(struct snd_mixer_oss_file *fmixer,
struct snd_mixer_oss_slot *pslot,
int active)
{
struct slot *slot = pslot->private_data;
snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], active, active, 1);
return 0;
}
static int snd_mixer_oss_get_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int *active_index)
{
struct snd_card *card = fmixer->card;
struct snd_mixer_oss *mixer = fmixer->mixer;
struct snd_kcontrol *kctl;
struct snd_mixer_oss_slot *pslot;
struct slot *slot;
struct snd_ctl_elem_info *uinfo;
struct snd_ctl_elem_value *uctl;
int err, idx;
uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
if (uinfo == NULL || uctl == NULL) {
err = -ENOMEM;
goto __free_only;
}
down_read(&card->controls_rwsem);
kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
if (! kctl) {
err = -ENOENT;
goto __unlock;
}
err = kctl->info(kctl, uinfo);
if (err < 0)
goto __unlock;
err = kctl->get(kctl, uctl);
if (err < 0)
goto __unlock;
for (idx = 0; idx < 32; idx++) {
if (!(mixer->mask_recsrc & (1 << idx)))
continue;
pslot = &mixer->slots[idx];
slot = pslot->private_data;
if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
continue;
if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
continue;
if (slot->capture_item == uctl->value.enumerated.item[0]) {
*active_index = idx;
break;
}
}
err = 0;
__unlock:
up_read(&card->controls_rwsem);
__free_only:
kfree(uctl);
kfree(uinfo);
return err;
}
static int snd_mixer_oss_put_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int active_index)
{
struct snd_card *card = fmixer->card;
struct snd_mixer_oss *mixer = fmixer->mixer;
struct snd_kcontrol *kctl;
struct snd_mixer_oss_slot *pslot;
struct slot *slot = NULL;
struct snd_ctl_elem_info *uinfo;
struct snd_ctl_elem_value *uctl;
int err;
unsigned int idx;
uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
if (uinfo == NULL || uctl == NULL) {
err = -ENOMEM;
goto __free_only;
}
down_read(&card->controls_rwsem);
kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
if (! kctl) {
err = -ENOENT;
goto __unlock;
}
err = kctl->info(kctl, uinfo);
if (err < 0)
goto __unlock;
for (idx = 0; idx < 32; idx++) {
if (!(mixer->mask_recsrc & (1 << idx)))
continue;
pslot = &mixer->slots[idx];
slot = pslot->private_data;
if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
continue;
if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
continue;
if (idx == active_index)
break;
slot = NULL;
}
if (! slot)
goto __unlock;
for (idx = 0; idx < uinfo->count; idx++)
uctl->value.enumerated.item[idx] = slot->capture_item;
err = kctl->put(kctl, uctl);
if (err > 0)
snd_ctl_notify(fmixer->card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
err = 0;
__unlock:
up_read(&card->controls_rwsem);
__free_only:
kfree(uctl);
kfree(uinfo);
return err;
}
struct snd_mixer_oss_assign_table {
int oss_id;
const char *name;
int index;
};
static int snd_mixer_oss_build_test(struct snd_mixer_oss *mixer, struct slot *slot, const char *name, int index, int item)
{
struct snd_ctl_elem_info *info;
struct snd_kcontrol *kcontrol;
struct snd_card *card = mixer->card;
int err;
down_read(&card->controls_rwsem);
kcontrol = snd_mixer_oss_test_id(mixer, name, index);
if (kcontrol == NULL) {
up_read(&card->controls_rwsem);
return 0;
}
info = kmalloc(sizeof(*info), GFP_KERNEL);
if (! info) {
up_read(&card->controls_rwsem);
return -ENOMEM;
}
err = kcontrol->info(kcontrol, info);
if (err < 0) {
up_read(&card->controls_rwsem);
kfree(info);
return err;
}
slot->numid[item] = kcontrol->id.numid;
up_read(&card->controls_rwsem);
if (info->count > slot->channels)
slot->channels = info->count;
slot->present |= 1 << item;
kfree(info);
return 0;
}
static void snd_mixer_oss_slot_free(struct snd_mixer_oss_slot *chn)
{
struct slot *p = chn->private_data;
if (p) {
if (p->allocated && p->assigned) {
kfree_const(p->assigned->name);
kfree_const(p->assigned);
}
kfree(p);
}
}
static void mixer_slot_clear(struct snd_mixer_oss_slot *rslot)
{
int idx = rslot->number; /* remember this */
if (rslot->private_free)
rslot->private_free(rslot);
memset(rslot, 0, sizeof(*rslot));
rslot->number = idx;
}
/* In a separate function to keep gcc 3.2 happy - do NOT merge this in
snd_mixer_oss_build_input! */
static int snd_mixer_oss_build_test_all(struct snd_mixer_oss *mixer,
const struct snd_mixer_oss_assign_table *ptr,
struct slot *slot)
{
char str[64];
int err;
err = snd_mixer_oss_build_test(mixer, slot, ptr->name, ptr->index,
SNDRV_MIXER_OSS_ITEM_GLOBAL);
if (err)
return err;
sprintf(str, "%s Switch", ptr->name);
err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
SNDRV_MIXER_OSS_ITEM_GSWITCH);
if (err)
return err;
sprintf(str, "%s Route", ptr->name);
err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
SNDRV_MIXER_OSS_ITEM_GROUTE);
if (err)
return err;
sprintf(str, "%s Volume", ptr->name);
err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
SNDRV_MIXER_OSS_ITEM_GVOLUME);
if (err)
return err;
sprintf(str, "%s Playback Switch", ptr->name);
err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
SNDRV_MIXER_OSS_ITEM_PSWITCH);
if (err)
return err;
sprintf(str, "%s Playback Route", ptr->name);
err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
SNDRV_MIXER_OSS_ITEM_PROUTE);
if (err)
return err;
sprintf(str, "%s Playback Volume", ptr->name);
err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
SNDRV_MIXER_OSS_ITEM_PVOLUME);
if (err)
return err;
sprintf(str, "%s Capture Switch", ptr->name);
err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
SNDRV_MIXER_OSS_ITEM_CSWITCH);
if (err)
return err;
sprintf(str, "%s Capture Route", ptr->name);
err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
SNDRV_MIXER_OSS_ITEM_CROUTE);
if (err)
return err;
sprintf(str, "%s Capture Volume", ptr->name);
err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
SNDRV_MIXER_OSS_ITEM_CVOLUME);
if (err)
return err;
return 0;
}
/*
* build an OSS mixer element.
* ptr_allocated means the entry is dynamically allocated (change via proc file).
* when replace_old = 1, the old entry is replaced with the new one.
*/
static int snd_mixer_oss_build_input(struct snd_mixer_oss *mixer,
const struct snd_mixer_oss_assign_table *ptr,
int ptr_allocated, int replace_old)
{
struct slot slot;
struct slot *pslot;
struct snd_kcontrol *kctl;
struct snd_mixer_oss_slot *rslot;
char str[64];
/* check if already assigned */
if (mixer->slots[ptr->oss_id].get_volume && ! replace_old)
return 0;
memset(&slot, 0, sizeof(slot));
memset(slot.numid, 0xff, sizeof(slot.numid)); /* ID_UNKNOWN */
if (snd_mixer_oss_build_test_all(mixer, ptr, &slot))
return 0;
down_read(&mixer->card->controls_rwsem);
kctl = NULL;
if (!ptr->index)
kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
if (kctl) {
struct snd_ctl_elem_info *uinfo;
uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
if (! uinfo) {
up_read(&mixer->card->controls_rwsem);
return -ENOMEM;
}
if (kctl->info(kctl, uinfo)) {
up_read(&mixer->card->controls_rwsem);
kfree(uinfo);
return 0;
}
strcpy(str, ptr->name);
if (!strcmp(str, "Master"))
strcpy(str, "Mix");
if (!strcmp(str, "Master Mono"))
strcpy(str, "Mix Mono");
slot.capture_item = 0;
if (!strcmp(uinfo->value.enumerated.name, str)) {
slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
} else {
for (slot.capture_item = 1; slot.capture_item < uinfo->value.enumerated.items; slot.capture_item++) {
uinfo->value.enumerated.item = slot.capture_item;
if (kctl->info(kctl, uinfo)) {
up_read(&mixer->card->controls_rwsem);
kfree(uinfo);
return 0;
}
if (!strcmp(uinfo->value.enumerated.name, str)) {
slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
break;
}
}
}
kfree(uinfo);
}
up_read(&mixer->card->controls_rwsem);
if (slot.present != 0) {
pslot = kmalloc(sizeof(slot), GFP_KERNEL);
if (! pslot)
return -ENOMEM;
*pslot = slot;
pslot->signature = SNDRV_MIXER_OSS_SIGNATURE;
pslot->assigned = ptr;
pslot->allocated = ptr_allocated;
rslot = &mixer->slots[ptr->oss_id];
mixer_slot_clear(rslot);
rslot->stereo = slot.channels > 1 ? 1 : 0;
rslot->get_volume = snd_mixer_oss_get_volume1;
rslot->put_volume = snd_mixer_oss_put_volume1;
/* note: ES18xx have both Capture Source and XX Capture Volume !!! */
if (slot.present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
rslot->get_recsrc = snd_mixer_oss_get_recsrc1_sw;
rslot->put_recsrc = snd_mixer_oss_put_recsrc1_sw;
} else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
rslot->get_recsrc = snd_mixer_oss_get_recsrc1_route;
rslot->put_recsrc = snd_mixer_oss_put_recsrc1_route;
} else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CAPTURE) {
mixer->mask_recsrc |= 1 << ptr->oss_id;
}
rslot->private_data = pslot;
rslot->private_free = snd_mixer_oss_slot_free;
return 1;
}
return 0;
}
#ifdef CONFIG_SND_PROC_FS
/*
*/
#define MIXER_VOL(name) [SOUND_MIXER_##name] = #name
static const char * const oss_mixer_names[SNDRV_OSS_MAX_MIXERS] = {
MIXER_VOL(VOLUME),
MIXER_VOL(BASS),
MIXER_VOL(TREBLE),
MIXER_VOL(SYNTH),
MIXER_VOL(PCM),
MIXER_VOL(SPEAKER),
MIXER_VOL(LINE),
MIXER_VOL(MIC),
MIXER_VOL(CD),
MIXER_VOL(IMIX),
MIXER_VOL(ALTPCM),
MIXER_VOL(RECLEV),
MIXER_VOL(IGAIN),
MIXER_VOL(OGAIN),
MIXER_VOL(LINE1),
MIXER_VOL(LINE2),
MIXER_VOL(LINE3),
MIXER_VOL(DIGITAL1),
MIXER_VOL(DIGITAL2),
MIXER_VOL(DIGITAL3),
MIXER_VOL(PHONEIN),
MIXER_VOL(PHONEOUT),
MIXER_VOL(VIDEO),
MIXER_VOL(RADIO),
MIXER_VOL(MONITOR),
};
/*
* /proc interface
*/
static void snd_mixer_oss_proc_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct snd_mixer_oss *mixer = entry->private_data;
int i;
mutex_lock(&mixer->reg_mutex);
for (i = 0; i < SNDRV_OSS_MAX_MIXERS; i++) {
struct slot *p;
if (! oss_mixer_names[i])
continue;
p = (struct slot *)mixer->slots[i].private_data;
snd_iprintf(buffer, "%s ", oss_mixer_names[i]);
if (p && p->assigned)
snd_iprintf(buffer, "\"%s\" %d\n",
p->assigned->name,
p->assigned->index);
else
snd_iprintf(buffer, "\"\" 0\n");
}
mutex_unlock(&mixer->reg_mutex);
}
static void snd_mixer_oss_proc_write(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct snd_mixer_oss *mixer = entry->private_data;
char line[128], str[32], idxstr[16];
const char *cptr;
unsigned int idx;
int ch;
struct snd_mixer_oss_assign_table *tbl;
struct slot *slot;
while (!snd_info_get_line(buffer, line, sizeof(line))) {
cptr = snd_info_get_str(str, line, sizeof(str));
for (ch = 0; ch < SNDRV_OSS_MAX_MIXERS; ch++)
if (oss_mixer_names[ch] && strcmp(oss_mixer_names[ch], str) == 0)
break;
if (ch >= SNDRV_OSS_MAX_MIXERS) {
pr_err("ALSA: mixer_oss: invalid OSS volume '%s'\n",
str);
continue;
}
cptr = snd_info_get_str(str, cptr, sizeof(str));
if (! *str) {
/* remove the entry */
mutex_lock(&mixer->reg_mutex);
mixer_slot_clear(&mixer->slots[ch]);
mutex_unlock(&mixer->reg_mutex);
continue;
}
snd_info_get_str(idxstr, cptr, sizeof(idxstr));
idx = simple_strtoul(idxstr, NULL, 10);
if (idx >= 0x4000) { /* too big */
pr_err("ALSA: mixer_oss: invalid index %d\n", idx);
continue;
}
mutex_lock(&mixer->reg_mutex);
slot = (struct slot *)mixer->slots[ch].private_data;
if (slot && slot->assigned &&
slot->assigned->index == idx && ! strcmp(slot->assigned->name, str))
/* not changed */
goto __unlock;
tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
if (!tbl)
goto __unlock;
tbl->oss_id = ch;
tbl->name = kstrdup(str, GFP_KERNEL);
if (! tbl->name) {
kfree(tbl);
goto __unlock;
}
tbl->index = idx;
if (snd_mixer_oss_build_input(mixer, tbl, 1, 1) <= 0) {
kfree(tbl->name);
kfree(tbl);
}
__unlock:
mutex_unlock(&mixer->reg_mutex);
}
}
static void snd_mixer_oss_proc_init(struct snd_mixer_oss *mixer)
{
struct snd_info_entry *entry;
entry = snd_info_create_card_entry(mixer->card, "oss_mixer",
mixer->card->proc_root);
if (! entry)
return;
entry->content = SNDRV_INFO_CONTENT_TEXT;
entry->mode = S_IFREG | 0644;
entry->c.text.read = snd_mixer_oss_proc_read;
entry->c.text.write = snd_mixer_oss_proc_write;
entry->private_data = mixer;
if (snd_info_register(entry) < 0) {
snd_info_free_entry(entry);
entry = NULL;
}
mixer->proc_entry = entry;
}
static void snd_mixer_oss_proc_done(struct snd_mixer_oss *mixer)
{
snd_info_free_entry(mixer->proc_entry);
mixer->proc_entry = NULL;
}
#else /* !CONFIG_SND_PROC_FS */
#define snd_mixer_oss_proc_init(mix)
#define snd_mixer_oss_proc_done(mix)
#endif /* CONFIG_SND_PROC_FS */
static void snd_mixer_oss_build(struct snd_mixer_oss *mixer)
{
static const struct snd_mixer_oss_assign_table table[] = {
{ SOUND_MIXER_VOLUME, "Master", 0 },
{ SOUND_MIXER_VOLUME, "Front", 0 }, /* fallback */
{ SOUND_MIXER_BASS, "Tone Control - Bass", 0 },
{ SOUND_MIXER_TREBLE, "Tone Control - Treble", 0 },
{ SOUND_MIXER_SYNTH, "Synth", 0 },
{ SOUND_MIXER_SYNTH, "FM", 0 }, /* fallback */
{ SOUND_MIXER_SYNTH, "Music", 0 }, /* fallback */
{ SOUND_MIXER_PCM, "PCM", 0 },
{ SOUND_MIXER_SPEAKER, "Beep", 0 },
{ SOUND_MIXER_SPEAKER, "PC Speaker", 0 }, /* fallback */
{ SOUND_MIXER_SPEAKER, "Speaker", 0 }, /* fallback */
{ SOUND_MIXER_LINE, "Line", 0 },
{ SOUND_MIXER_MIC, "Mic", 0 },
{ SOUND_MIXER_CD, "CD", 0 },
{ SOUND_MIXER_IMIX, "Monitor Mix", 0 },
{ SOUND_MIXER_ALTPCM, "PCM", 1 },
{ SOUND_MIXER_ALTPCM, "Headphone", 0 }, /* fallback */
{ SOUND_MIXER_ALTPCM, "Wave", 0 }, /* fallback */
{ SOUND_MIXER_RECLEV, "-- nothing --", 0 },
{ SOUND_MIXER_IGAIN, "Capture", 0 },
{ SOUND_MIXER_OGAIN, "Playback", 0 },
{ SOUND_MIXER_LINE1, "Aux", 0 },
{ SOUND_MIXER_LINE2, "Aux", 1 },
{ SOUND_MIXER_LINE3, "Aux", 2 },
{ SOUND_MIXER_DIGITAL1, "Digital", 0 },
{ SOUND_MIXER_DIGITAL1, "IEC958", 0 }, /* fallback */
{ SOUND_MIXER_DIGITAL1, "IEC958 Optical", 0 }, /* fallback */
{ SOUND_MIXER_DIGITAL1, "IEC958 Coaxial", 0 }, /* fallback */
{ SOUND_MIXER_DIGITAL2, "Digital", 1 },
{ SOUND_MIXER_DIGITAL3, "Digital", 2 },
{ SOUND_MIXER_PHONEIN, "Phone", 0 },
{ SOUND_MIXER_PHONEOUT, "Master Mono", 0 },
{ SOUND_MIXER_PHONEOUT, "Speaker", 0 }, /*fallback*/
{ SOUND_MIXER_PHONEOUT, "Mono", 0 }, /*fallback*/
{ SOUND_MIXER_PHONEOUT, "Phone", 0 }, /* fallback */
{ SOUND_MIXER_VIDEO, "Video", 0 },
{ SOUND_MIXER_RADIO, "Radio", 0 },
{ SOUND_MIXER_MONITOR, "Monitor", 0 }
};
unsigned int idx;
for (idx = 0; idx < ARRAY_SIZE(table); idx++)
snd_mixer_oss_build_input(mixer, &table[idx], 0, 0);
if (mixer->mask_recsrc) {
mixer->get_recsrc = snd_mixer_oss_get_recsrc2;
mixer->put_recsrc = snd_mixer_oss_put_recsrc2;
}
}
/*
*
*/
static int snd_mixer_oss_free1(void *private)
{
struct snd_mixer_oss *mixer = private;
struct snd_card *card;
int idx;
if (!mixer)
return 0;
card = mixer->card;
if (snd_BUG_ON(mixer != card->mixer_oss))
return -ENXIO;
card->mixer_oss = NULL;
for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++) {
struct snd_mixer_oss_slot *chn = &mixer->slots[idx];
if (chn->private_free)
chn->private_free(chn);
}
kfree(mixer);
return 0;
}
static int snd_mixer_oss_notify_handler(struct snd_card *card, int cmd)
{
struct snd_mixer_oss *mixer;
if (cmd == SND_MIXER_OSS_NOTIFY_REGISTER) {
int idx, err;
mixer = kcalloc(2, sizeof(*mixer), GFP_KERNEL);
if (mixer == NULL)
return -ENOMEM;
mutex_init(&mixer->reg_mutex);
err = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER,
card, 0,
&snd_mixer_oss_f_ops, card);
if (err < 0) {
dev_err(card->dev,
"unable to register OSS mixer device %i:%i\n",
card->number, 0);
kfree(mixer);
return err;
}
mixer->oss_dev_alloc = 1;
mixer->card = card;
if (*card->mixername)
strscpy(mixer->name, card->mixername, sizeof(mixer->name));
else
snprintf(mixer->name, sizeof(mixer->name),
"mixer%i", card->number);
#ifdef SNDRV_OSS_INFO_DEV_MIXERS
snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIXERS,
card->number,
mixer->name);
#endif
for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++)
mixer->slots[idx].number = idx;
card->mixer_oss = mixer;
snd_mixer_oss_build(mixer);
snd_mixer_oss_proc_init(mixer);
} else {
mixer = card->mixer_oss;
if (mixer == NULL)
return 0;
if (mixer->oss_dev_alloc) {
#ifdef SNDRV_OSS_INFO_DEV_MIXERS
snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIXERS, mixer->card->number);
#endif
snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER, mixer->card, 0);
mixer->oss_dev_alloc = 0;
}
if (cmd == SND_MIXER_OSS_NOTIFY_DISCONNECT)
return 0;
snd_mixer_oss_proc_done(mixer);
return snd_mixer_oss_free1(mixer);
}
return 0;
}
static int __init alsa_mixer_oss_init(void)
{
struct snd_card *card;
int idx;
snd_mixer_oss_notify_callback = snd_mixer_oss_notify_handler;
for (idx = 0; idx < SNDRV_CARDS; idx++) {
card = snd_card_ref(idx);
if (card) {
snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_REGISTER);
snd_card_unref(card);
}
}
return 0;
}
static void __exit alsa_mixer_oss_exit(void)
{
struct snd_card *card;
int idx;
snd_mixer_oss_notify_callback = NULL;
for (idx = 0; idx < SNDRV_CARDS; idx++) {
card = snd_card_ref(idx);
if (card) {
snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_FREE);
snd_card_unref(card);
}
}
}
module_init(alsa_mixer_oss_init)
module_exit(alsa_mixer_oss_exit)
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