/*
* Routines for driver control interface
- * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
*
*
* This program is free software; you can redistribute it and/or modify
*
*/
-#include <sound/driver.h>
#include <linux/threads.h>
#include <linux/interrupt.h>
-#include <linux/smp_lock.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/time.h>
static void snd_ctl_empty_read_queue(struct snd_ctl_file * ctl)
{
+ unsigned long flags;
struct snd_kctl_event *cread;
- spin_lock(&ctl->read_lock);
+ spin_lock_irqsave(&ctl->read_lock, flags);
while (!list_empty(&ctl->events)) {
cread = snd_kctl_event(ctl->events.next);
list_del(&cread->list);
kfree(cread);
}
- spin_unlock(&ctl->read_lock);
+ spin_unlock_irqrestore(&ctl->read_lock, flags);
}
static int snd_ctl_release(struct inode *inode, struct file *file)
{
unsigned long flags;
- struct list_head *list;
struct snd_card *card;
struct snd_ctl_file *ctl;
struct snd_kcontrol *control;
list_del(&ctl->list);
write_unlock_irqrestore(&card->ctl_files_rwlock, flags);
down_write(&card->controls_rwsem);
- list_for_each(list, &card->controls) {
- control = snd_kcontrol(list);
+ list_for_each_entry(control, &card->controls, list)
for (idx = 0; idx < control->count; idx++)
if (control->vd[idx].owner == ctl)
control->vd[idx].owner = NULL;
- }
up_write(&card->controls_rwsem);
snd_ctl_empty_read_queue(ctl);
kfree(ctl);
struct snd_ctl_elem_id *id)
{
unsigned long flags;
- struct list_head *flist;
struct snd_ctl_file *ctl;
struct snd_kctl_event *ev;
#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
card->mixer_oss_change_count++;
#endif
- list_for_each(flist, &card->ctl_files) {
- struct list_head *elist;
- ctl = snd_ctl_file(flist);
+ list_for_each_entry(ctl, &card->ctl_files, list) {
if (!ctl->subscribed)
continue;
spin_lock_irqsave(&ctl->read_lock, flags);
- list_for_each(elist, &ctl->events) {
- ev = snd_kctl_event(elist);
+ list_for_each_entry(ev, &ctl->events, list) {
if (ev->id.numid == id->numid) {
ev->mask |= mask;
goto _found;
*
* Returns the pointer of the new instance, or NULL on failure.
*/
-struct snd_kcontrol *snd_ctl_new(struct snd_kcontrol *control, unsigned int access)
+static struct snd_kcontrol *snd_ctl_new(struct snd_kcontrol *control,
+ unsigned int access)
{
struct snd_kcontrol *kctl;
unsigned int idx;
return kctl;
}
-EXPORT_SYMBOL(snd_ctl_new);
-
/**
* snd_ctl_new1 - create a control instance from the template
* @ncontrol: the initialization record
access = ncontrol->access == 0 ? SNDRV_CTL_ELEM_ACCESS_READWRITE :
(ncontrol->access & (SNDRV_CTL_ELEM_ACCESS_READWRITE|
SNDRV_CTL_ELEM_ACCESS_INACTIVE|
- SNDRV_CTL_ELEM_ACCESS_DINDIRECT|
- SNDRV_CTL_ELEM_ACCESS_INDIRECT|
SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE|
SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK));
kctl.info = ncontrol->info;
static unsigned int snd_ctl_hole_check(struct snd_card *card,
unsigned int count)
{
- struct list_head *list;
struct snd_kcontrol *kctl;
- list_for_each(list, &card->controls) {
- kctl = snd_kcontrol(list);
+ list_for_each_entry(kctl, &card->controls, list) {
if ((kctl->id.numid <= card->last_numid &&
kctl->id.numid + kctl->count > card->last_numid) ||
(kctl->id.numid <= card->last_numid + count - 1 &&
*/
struct snd_kcontrol *snd_ctl_find_numid(struct snd_card *card, unsigned int numid)
{
- struct list_head *list;
struct snd_kcontrol *kctl;
snd_assert(card != NULL && numid != 0, return NULL);
- list_for_each(list, &card->controls) {
- kctl = snd_kcontrol(list);
+ list_for_each_entry(kctl, &card->controls, list) {
if (kctl->id.numid <= numid && kctl->id.numid + kctl->count > numid)
return kctl;
}
struct snd_kcontrol *snd_ctl_find_id(struct snd_card *card,
struct snd_ctl_elem_id *id)
{
- struct list_head *list;
struct snd_kcontrol *kctl;
snd_assert(card != NULL && id != NULL, return NULL);
if (id->numid != 0)
return snd_ctl_find_numid(card, id->numid);
- list_for_each(list, &card->controls) {
- kctl = snd_kcontrol(list);
+ list_for_each_entry(kctl, &card->controls, list) {
if (kctl->id.iface != id->iface)
continue;
if (kctl->id.device != id->device)
struct snd_kcontrol *kctl;
struct snd_kcontrol_volatile *vd;
unsigned int index_offset;
- int result, indirect;
+ int result;
down_read(&card->controls_rwsem);
kctl = snd_ctl_find_id(card, &control->id);
} else {
index_offset = snd_ctl_get_ioff(kctl, &control->id);
vd = &kctl->vd[index_offset];
- indirect = vd->access & SNDRV_CTL_ELEM_ACCESS_INDIRECT ? 1 : 0;
- if (control->indirect != indirect) {
- result = -EACCES;
- } else {
- if ((vd->access & SNDRV_CTL_ELEM_ACCESS_READ) && kctl->get != NULL) {
- snd_ctl_build_ioff(&control->id, kctl, index_offset);
- result = kctl->get(kctl, control);
- } else {
- result = -EPERM;
- }
- }
+ if ((vd->access & SNDRV_CTL_ELEM_ACCESS_READ) &&
+ kctl->get != NULL) {
+ snd_ctl_build_ioff(&control->id, kctl, index_offset);
+ result = kctl->get(kctl, control);
+ } else
+ result = -EPERM;
}
up_read(&card->controls_rwsem);
return result;
}
-EXPORT_SYMBOL(snd_ctl_elem_read);
-
static int snd_ctl_elem_read_user(struct snd_card *card,
struct snd_ctl_elem_value __user *_control)
{
struct snd_kcontrol *kctl;
struct snd_kcontrol_volatile *vd;
unsigned int index_offset;
- int result, indirect;
+ int result;
down_read(&card->controls_rwsem);
kctl = snd_ctl_find_id(card, &control->id);
} else {
index_offset = snd_ctl_get_ioff(kctl, &control->id);
vd = &kctl->vd[index_offset];
- indirect = vd->access & SNDRV_CTL_ELEM_ACCESS_INDIRECT ? 1 : 0;
- if (control->indirect != indirect) {
- result = -EACCES;
+ if (!(vd->access & SNDRV_CTL_ELEM_ACCESS_WRITE) ||
+ kctl->put == NULL ||
+ (file && vd->owner && vd->owner != file)) {
+ result = -EPERM;
} else {
- if (!(vd->access & SNDRV_CTL_ELEM_ACCESS_WRITE) ||
- kctl->put == NULL ||
- (file && vd->owner != NULL && vd->owner != file)) {
- result = -EPERM;
- } else {
- snd_ctl_build_ioff(&control->id, kctl, index_offset);
- result = kctl->put(kctl, control);
- }
- if (result > 0) {
- up_read(&card->controls_rwsem);
- snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &control->id);
- return 0;
- }
+ snd_ctl_build_ioff(&control->id, kctl, index_offset);
+ result = kctl->put(kctl, control);
+ }
+ if (result > 0) {
+ up_read(&card->controls_rwsem);
+ snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE,
+ &control->id);
+ return 0;
}
}
up_read(&card->controls_rwsem);
return result;
}
-EXPORT_SYMBOL(snd_ctl_elem_write);
-
static int snd_ctl_elem_write_user(struct snd_ctl_file *file,
struct snd_ctl_elem_value __user *_control)
{
{
struct snd_ctl_file *ctl;
struct snd_card *card;
- struct list_head *list;
struct snd_kctl_ioctl *p;
void __user *argp = (void __user *)arg;
int __user *ip = argp;
#endif
}
down_read(&snd_ioctl_rwsem);
- list_for_each(list, &snd_control_ioctls) {
- p = list_entry(list, struct snd_kctl_ioctl, list);
+ list_for_each_entry(p, &snd_control_ioctls, list) {
err = p->fioctl(card, ctl, cmd, arg);
if (err != -ENOIOCTLCMD) {
up_read(&snd_ioctl_rwsem);
static int _snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn,
struct list_head *lists)
{
- struct list_head *list;
struct snd_kctl_ioctl *p;
snd_assert(fcn != NULL, return -EINVAL);
down_write(&snd_ioctl_rwsem);
- list_for_each(list, lists) {
- p = list_entry(list, struct snd_kctl_ioctl, list);
+ list_for_each_entry(p, lists, list) {
if (p->fioctl == fcn) {
list_del(&p->list);
up_write(&snd_ioctl_rwsem);
* INIT PART
*/
-static struct file_operations snd_ctl_f_ops =
+static const struct file_operations snd_ctl_f_ops =
{
.owner = THIS_MODULE,
.read = snd_ctl_read,
static int snd_ctl_dev_disconnect(struct snd_device *device)
{
struct snd_card *card = device->device_data;
- struct list_head *flist;
struct snd_ctl_file *ctl;
int err, cardnum;
snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
down_read(&card->controls_rwsem);
- list_for_each(flist, &card->ctl_files) {
- ctl = snd_ctl_file(flist);
+ list_for_each_entry(ctl, &card->ctl_files, list) {
wake_up(&ctl->change_sleep);
kill_fasync(&ctl->fasync, SIGIO, POLL_ERR);
}
snd_assert(card != NULL, return -ENXIO);
return snd_device_new(card, SNDRV_DEV_CONTROL, card, &ops);
}
+
+/*
+ * Frequently used control callbacks
+ */
+int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+ uinfo->count = 1;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = 1;
+ return 0;
+}
+
+EXPORT_SYMBOL(snd_ctl_boolean_mono_info);
+
+int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+ uinfo->count = 2;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = 1;
+ return 0;
+}
+
+EXPORT_SYMBOL(snd_ctl_boolean_stereo_info);
git.openpandora.org / pandora-kernel.git / blobdiff