#include <sound/info.h>
#include <sound/control.h>
+/* max number of user-defined controls */
+#define MAX_USER_CONTROLS 32
+
typedef struct _snd_kctl_ioctl {
struct list_head list; /* list of all ioctls */
snd_kctl_ioctl_func_t fioctl;
return result;
}
-static int snd_ctl_elem_read(snd_card_t *card, snd_ctl_elem_value_t __user *_control)
+int snd_ctl_elem_read(snd_card_t *card, snd_ctl_elem_value_t *control)
{
- snd_ctl_elem_value_t *control;
snd_kcontrol_t *kctl;
snd_kcontrol_volatile_t *vd;
unsigned int index_offset;
int result, indirect;
-
- control = kmalloc(sizeof(*control), GFP_KERNEL);
- if (control == NULL)
- return -ENOMEM;
- if (copy_from_user(control, _control, sizeof(*control)))
- return -EFAULT;
+
down_read(&card->controls_rwsem);
kctl = snd_ctl_find_id(card, &control->id);
if (kctl == NULL) {
}
}
up_read(&card->controls_rwsem);
+ return result;
+}
+
+static int snd_ctl_elem_read_user(snd_card_t *card, snd_ctl_elem_value_t __user *_control)
+{
+ snd_ctl_elem_value_t *control;
+ int result;
+
+ control = kmalloc(sizeof(*control), GFP_KERNEL);
+ if (control == NULL)
+ return -ENOMEM;
+ if (copy_from_user(control, _control, sizeof(*control))) {
+ kfree(control);
+ return -EFAULT;
+ }
+ result = snd_ctl_elem_read(card, control);
if (result >= 0)
if (copy_to_user(_control, control, sizeof(*control)))
- return -EFAULT;
+ result = -EFAULT;
kfree(control);
return result;
}
-static int snd_ctl_elem_write(snd_ctl_file_t *file, snd_ctl_elem_value_t __user *_control)
+int snd_ctl_elem_write(snd_card_t *card, snd_ctl_file_t *file, snd_ctl_elem_value_t *control)
{
- snd_card_t *card = file->card;
- snd_ctl_elem_value_t *control;
snd_kcontrol_t *kctl;
snd_kcontrol_volatile_t *vd;
unsigned int index_offset;
int result, indirect;
- control = kmalloc(sizeof(*control), GFP_KERNEL);
- if (control == NULL)
- return -ENOMEM;
- if (copy_from_user(control, _control, sizeof(*control)))
- return -EFAULT;
down_read(&card->controls_rwsem);
kctl = snd_ctl_find_id(card, &control->id);
if (kctl == NULL) {
} else {
if (!(vd->access & SNDRV_CTL_ELEM_ACCESS_WRITE) ||
kctl->put == NULL ||
- (vd->owner != NULL && vd->owner != file)) {
+ (file && vd->owner != NULL && vd->owner != file)) {
result = -EPERM;
} else {
snd_ctl_build_ioff(&control->id, kctl, index_offset);
if (result > 0) {
up_read(&card->controls_rwsem);
snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &control->id);
- result = 0;
- goto __unlocked;
+ return 0;
}
}
}
up_read(&card->controls_rwsem);
- __unlocked:
+ return result;
+}
+
+static int snd_ctl_elem_write_user(snd_ctl_file_t *file, snd_ctl_elem_value_t __user *_control)
+{
+ snd_ctl_elem_value_t *control;
+ int result;
+
+ control = kmalloc(sizeof(*control), GFP_KERNEL);
+ if (control == NULL)
+ return -ENOMEM;
+ if (copy_from_user(control, _control, sizeof(*control))) {
+ kfree(control);
+ return -EFAULT;
+ }
+ result = snd_ctl_elem_write(file->card, file, control);
if (result >= 0)
if (copy_to_user(_control, control, sizeof(*control)))
- return -EFAULT;
+ result = -EFAULT;
kfree(control);
return result;
}
}
struct user_element {
- enum sndrv_ctl_elem_type type; /* element type */
- unsigned int elem_count; /* count of elements */
- union {
- struct {
- unsigned int items;
- } enumerated;
- } u;
+ snd_ctl_elem_info_t info;
void *elem_data; /* element data */
unsigned long elem_data_size; /* size of element data in bytes */
void *priv_data; /* private data (like strings for enumerated type) */
unsigned long priv_data_size; /* size of private data in bytes */
- unsigned short dimen_count; /* count of dimensions */
- unsigned short dimen[0]; /* array of dimensions */
};
static int snd_ctl_elem_user_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
{
struct user_element *ue = kcontrol->private_data;
- uinfo->type = ue->type;
- uinfo->count = ue->elem_count;
- if (ue->type == SNDRV_CTL_ELEM_TYPE_ENUMERATED) {
- uinfo->value.enumerated.items = ue->u.enumerated.items;
- if (uinfo->value.enumerated.item >= ue->u.enumerated.items)
+ *uinfo = ue->info;
+ if (ue->info.type == SNDRV_CTL_ELEM_TYPE_ENUMERATED) {
+ uinfo->value.enumerated.items = ue->info.value.enumerated.items;
+ if (uinfo->value.enumerated.item >= ue->info.value.enumerated.items)
uinfo->value.enumerated.item = 0;
strlcpy(uinfo->value.enumerated.name,
(char *)ue->priv_data + uinfo->value.enumerated.item * 64,
int change;
struct user_element *ue = kcontrol->private_data;
- change = memcmp(&ucontrol->value, ue->elem_data, ue->elem_data_size);
- memcpy(ue->elem_data, &ucontrol->value, ue->elem_data_size);
- return !!change;
+ change = memcmp(&ucontrol->value, ue->elem_data, ue->elem_data_size) != 0;
+ if (change)
+ memcpy(ue->elem_data, &ucontrol->value, ue->elem_data_size);
+ return change;
}
static void snd_ctl_elem_user_free(snd_kcontrol_t * kcontrol)
snd_ctl_elem_info_t info;
snd_kcontrol_t kctl, *_kctl;
unsigned int access;
- long private_size, dimen_size, extra_size;
+ long private_size, extra_size;
struct user_element *ue;
int idx, err;
+ if (card->user_ctl_count >= MAX_USER_CONTROLS)
+ return -ENOMEM;
if (copy_from_user(&info, _info, sizeof(info)))
return -EFAULT;
if (info.count > 1024)
return -EINVAL;
access = info.access == 0 ? SNDRV_CTL_ELEM_ACCESS_READWRITE :
- (info.access & (SNDRV_CTL_ELEM_ACCESS_READWRITE|SNDRV_CTL_ELEM_ACCESS_INACTIVE|
- SNDRV_CTL_ELEM_ACCESS_DINDIRECT|SNDRV_CTL_ELEM_ACCESS_INDIRECT));
- if (access & (SNDRV_CTL_ELEM_ACCESS_DINDIRECT | SNDRV_CTL_ELEM_ACCESS_INDIRECT))
- return -EINVAL;
+ (info.access & (SNDRV_CTL_ELEM_ACCESS_READWRITE|SNDRV_CTL_ELEM_ACCESS_INACTIVE));
info.id.numid = 0;
memset(&kctl, 0, sizeof(kctl));
down_write(&card->controls_rwsem);
- if (!!((_kctl = snd_ctl_find_id(card, &info.id)) != NULL) ^ replace) {
- up_write(&card->controls_rwsem);
- return !replace ? -EBUSY : -ENOENT;
- }
- if (replace) {
- err = snd_ctl_remove(card, _kctl);
- if (err < 0) {
- up_write(&card->controls_rwsem);
- return err;
- }
+ _kctl = snd_ctl_find_id(card, &info.id);
+ err = 0;
+ if (_kctl) {
+ if (replace)
+ err = snd_ctl_remove(card, _kctl);
+ else
+ err = -EBUSY;
+ } else {
+ if (replace)
+ err = -ENOENT;
}
up_write(&card->controls_rwsem);
+ if (err < 0)
+ return err;
memcpy(&kctl.id, &info.id, sizeof(info.id));
kctl.count = info.owner ? info.owner : 1;
access |= SNDRV_CTL_ELEM_ACCESS_USER;
private_size = sizeof(unsigned int);
if (info.count > 128)
return -EINVAL;
- if (info.value.enumerated.items > 1024)
+ if (info.value.enumerated.items > 128)
return -EINVAL;
extra_size = info.value.enumerated.items * 64;
break;
return -EINVAL;
}
private_size *= info.count;
- if (private_size > 1024 * 1024)
- return -EINVAL;
- dimen_size = 0;
- if (!(info.access & SNDRV_CTL_ELEM_ACCESS_DINDIRECT))
- for (idx = 0; idx < 4 && info.dimen.d[idx]; idx++)
- dimen_size += sizeof(unsigned short);
- ue = kcalloc(1, sizeof(struct user_element) + dimen_size + private_size + extra_size, GFP_KERNEL);
+ ue = kcalloc(1, sizeof(struct user_element) + private_size + extra_size, GFP_KERNEL);
if (ue == NULL)
return -ENOMEM;
- ue->type = info.type;
- ue->elem_count = info.count;
- if (!(info.access & SNDRV_CTL_ELEM_ACCESS_DINDIRECT)) {
- for (idx = 0; idx < 4 && info.dimen.d[idx]; idx++)
- ue->dimen[idx] = info.dimen.d[idx];
- ue->dimen_count = dimen_size / sizeof(unsigned short);
- }
- ue->elem_data = (char *)ue + sizeof(ue) + dimen_size;
+ ue->info = info;
+ ue->elem_data = (char *)ue + sizeof(ue);
ue->elem_data_size = private_size;
if (extra_size) {
- ue->priv_data = (char *)ue + sizeof(ue) + dimen_size + private_size;
+ ue->priv_data = (char *)ue + sizeof(ue) + private_size;
ue->priv_data_size = extra_size;
- if (ue->type == SNDRV_CTL_ELEM_TYPE_ENUMERATED) {
- if (copy_from_user(ue->priv_data, *(char **)info.value.enumerated.name, extra_size))
+ if (ue->info.type == SNDRV_CTL_ELEM_TYPE_ENUMERATED) {
+ if (copy_from_user(ue->priv_data, *(char __user **)info.value.enumerated.name, extra_size))
return -EFAULT;
- ue->u.enumerated.items = info.value.enumerated.items;
}
}
kctl.private_free = snd_ctl_elem_user_free;
snd_ctl_free_one(_kctl);
return err;
}
+
+ down_write(&card->controls_rwsem);
+ card->user_ctl_count++;
+ up_write(&card->controls_rwsem);
+
return 0;
}
static int snd_ctl_elem_remove(snd_ctl_file_t *file, snd_ctl_elem_id_t __user *_id)
{
snd_ctl_elem_id_t id;
+ int err;
if (copy_from_user(&id, _id, sizeof(id)))
return -EFAULT;
- return snd_ctl_remove_unlocked_id(file, &id);
+ err = snd_ctl_remove_unlocked_id(file, &id);
+ if (! err) {
+ snd_card_t *card = file->card;
+ down_write(&card->controls_rwsem);
+ card->user_ctl_count--;
+ up_write(&card->controls_rwsem);
+ }
+ return err;
}
static int snd_ctl_subscribe_events(snd_ctl_file_t *file, int __user *ptr)
{
switch (power_state) {
case SNDRV_CTL_POWER_D0:
- case SNDRV_CTL_POWER_D1:
- case SNDRV_CTL_POWER_D2:
- if (card->power_state != power_state)
+ if (card->power_state != power_state) {
/* FIXME: pass the correct state value */
card->pm_resume(card, 0);
+ snd_power_change_state(card, power_state);
+ }
break;
case SNDRV_CTL_POWER_D3hot:
- case SNDRV_CTL_POWER_D3cold:
- if (card->power_state != power_state)
+ if (card->power_state != power_state) {
/* FIXME: pass the correct state value */
card->pm_suspend(card, 0);
+ snd_power_change_state(card, power_state);
+ }
break;
+ case SNDRV_CTL_POWER_D1:
+ case SNDRV_CTL_POWER_D2:
+ case SNDRV_CTL_POWER_D3cold:
+ /* not supported yet */
default:
return -EINVAL;
}
case SNDRV_CTL_IOCTL_ELEM_INFO:
return snd_ctl_elem_info(ctl, argp);
case SNDRV_CTL_IOCTL_ELEM_READ:
- return snd_ctl_elem_read(ctl->card, argp);
+ return snd_ctl_elem_read_user(ctl->card, argp);
case SNDRV_CTL_IOCTL_ELEM_WRITE:
- return snd_ctl_elem_write(ctl, argp);
+ return snd_ctl_elem_write_user(ctl, argp);
case SNDRV_CTL_IOCTL_ELEM_LOCK:
return snd_ctl_elem_lock(ctl, argp);
case SNDRV_CTL_IOCTL_ELEM_UNLOCK:
};
/*
- * registration of the control device:
- * called from init.c
+ * registration of the control device
*/
-int snd_ctl_register(snd_card_t *card)
+static int snd_ctl_dev_register(snd_device_t *device)
{
+ snd_card_t *card = device->device_data;
int err, cardnum;
char name[16];
}
/*
- * disconnection of the control device:
- * called from init.c
+ * disconnection of the control device
*/
-int snd_ctl_disconnect(snd_card_t *card)
+static int snd_ctl_dev_disconnect(snd_device_t *device)
{
+ snd_card_t *card = device->device_data;
struct list_head *flist;
snd_ctl_file_t *ctl;
}
/*
- * de-registration of the control device:
- * called from init.c
+ * free all controls
*/
-int snd_ctl_unregister(snd_card_t *card)
+static int snd_ctl_dev_free(snd_device_t *device)
{
- int err, cardnum;
+ snd_card_t *card = device->device_data;
snd_kcontrol_t *control;
- snd_assert(card != NULL, return -ENXIO);
- cardnum = card->number;
- snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
- if ((err = snd_unregister_device(SNDRV_DEVICE_TYPE_CONTROL, card, 0)) < 0)
- return err;
down_write(&card->controls_rwsem);
while (!list_empty(&card->controls)) {
control = snd_kcontrol(card->controls.next);
up_write(&card->controls_rwsem);
return 0;
}
+
+/*
+ * de-registration of the control device
+ */
+static int snd_ctl_dev_unregister(snd_device_t *device)
+{
+ snd_card_t *card = device->device_data;
+ int err, cardnum;
+
+ snd_assert(card != NULL, return -ENXIO);
+ cardnum = card->number;
+ snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
+ if ((err = snd_unregister_device(SNDRV_DEVICE_TYPE_CONTROL, card, 0)) < 0)
+ return err;
+ return snd_ctl_dev_free(device);
+}
+
+/*
+ * create control core:
+ * called from init.c
+ */
+int snd_ctl_create(snd_card_t *card)
+{
+ static snd_device_ops_t ops = {
+ .dev_free = snd_ctl_dev_free,
+ .dev_register = snd_ctl_dev_register,
+ .dev_disconnect = snd_ctl_dev_disconnect,
+ .dev_unregister = snd_ctl_dev_unregister
+ };
+
+ snd_assert(card != NULL, return -ENXIO);
+ return snd_device_new(card, SNDRV_DEV_CONTROL, card, &ops);
+}
git://git.onelab.eu / linux-2.6.git / blobdiff