#include <linux/smp_lock.h>
#include <linux/slab.h>
#include <linux/time.h>
+#include <linux/mutex.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/minors.h>
MODULE_DESCRIPTION("Hardware dependent layer");
MODULE_LICENSE("GPL");
-static snd_hwdep_t *snd_hwdep_devices[SNDRV_CARDS * SNDRV_MINOR_HWDEPS];
+static LIST_HEAD(snd_hwdep_devices);
+static DEFINE_MUTEX(register_mutex);
-static DECLARE_MUTEX(register_mutex);
+static int snd_hwdep_free(struct snd_hwdep *hwdep);
+static int snd_hwdep_dev_free(struct snd_device *device);
+static int snd_hwdep_dev_register(struct snd_device *device);
+static int snd_hwdep_dev_unregister(struct snd_device *device);
-static int snd_hwdep_free(snd_hwdep_t *hwdep);
-static int snd_hwdep_dev_free(snd_device_t *device);
-static int snd_hwdep_dev_register(snd_device_t *device);
-static int snd_hwdep_dev_unregister(snd_device_t *device);
-/*
+static struct snd_hwdep *snd_hwdep_search(struct snd_card *card, int device)
+{
+ struct list_head *p;
+ struct snd_hwdep *hwdep;
- */
+ list_for_each(p, &snd_hwdep_devices) {
+ hwdep = list_entry(p, struct snd_hwdep, list);
+ if (hwdep->card == card && hwdep->device == device)
+ return hwdep;
+ }
+ return NULL;
+}
static loff_t snd_hwdep_llseek(struct file * file, loff_t offset, int orig)
{
- snd_hwdep_t *hw = file->private_data;
+ struct snd_hwdep *hw = file->private_data;
if (hw->ops.llseek)
return hw->ops.llseek(hw, file, offset, orig);
return -ENXIO;
}
-static ssize_t snd_hwdep_read(struct file * file, char __user *buf, size_t count, loff_t *offset)
+static ssize_t snd_hwdep_read(struct file * file, char __user *buf,
+ size_t count, loff_t *offset)
{
- snd_hwdep_t *hw = file->private_data;
+ struct snd_hwdep *hw = file->private_data;
if (hw->ops.read)
return hw->ops.read(hw, buf, count, offset);
return -ENXIO;
}
-static ssize_t snd_hwdep_write(struct file * file, const char __user *buf, size_t count, loff_t *offset)
+static ssize_t snd_hwdep_write(struct file * file, const char __user *buf,
+ size_t count, loff_t *offset)
{
- snd_hwdep_t *hw = file->private_data;
+ struct snd_hwdep *hw = file->private_data;
if (hw->ops.write)
return hw->ops.write(hw, buf, count, offset);
return -ENXIO;
static int snd_hwdep_open(struct inode *inode, struct file * file)
{
int major = imajor(inode);
- int cardnum;
- int device;
- snd_hwdep_t *hw;
+ struct snd_hwdep *hw;
int err;
wait_queue_t wait;
- switch (major) {
- case CONFIG_SND_MAJOR:
- cardnum = SNDRV_MINOR_CARD(iminor(inode));
- device = SNDRV_MINOR_DEVICE(iminor(inode)) - SNDRV_MINOR_HWDEP;
- break;
+ if (major == snd_major) {
+ hw = snd_lookup_minor_data(iminor(inode),
+ SNDRV_DEVICE_TYPE_HWDEP);
#ifdef CONFIG_SND_OSSEMUL
- case SOUND_MAJOR:
- cardnum = SNDRV_MINOR_OSS_CARD(iminor(inode));
- device = 0;
- break;
+ } else if (major == SOUND_MAJOR) {
+ hw = snd_lookup_oss_minor_data(iminor(inode),
+ SNDRV_OSS_DEVICE_TYPE_DMFM);
#endif
- default:
+ } else
return -ENXIO;
- }
- cardnum %= SNDRV_CARDS;
- device %= SNDRV_MINOR_HWDEPS;
- hw = snd_hwdep_devices[(cardnum * SNDRV_MINOR_HWDEPS) + device];
if (hw == NULL)
return -ENODEV;
if (!hw->ops.open)
return -ENXIO;
-#ifdef CONFIG_SND_OSSEMUL
- if (major == SOUND_MAJOR && hw->oss_type < 0)
- return -ENXIO;
-#endif
if (!try_module_get(hw->card->module))
return -EFAULT;
init_waitqueue_entry(&wait, current);
add_wait_queue(&hw->open_wait, &wait);
- down(&hw->open_mutex);
+ mutex_lock(&hw->open_mutex);
while (1) {
if (hw->exclusive && hw->used > 0) {
err = -EBUSY;
} else
break;
set_current_state(TASK_INTERRUPTIBLE);
- up(&hw->open_mutex);
+ mutex_unlock(&hw->open_mutex);
schedule();
- down(&hw->open_mutex);
+ mutex_lock(&hw->open_mutex);
if (signal_pending(current)) {
err = -ERESTARTSYS;
break;
hw->ops.release(hw, file);
}
}
- up(&hw->open_mutex);
+ mutex_unlock(&hw->open_mutex);
if (err < 0)
module_put(hw->card->module);
return err;
static int snd_hwdep_release(struct inode *inode, struct file * file)
{
int err = -ENXIO;
- snd_hwdep_t *hw = file->private_data;
- down(&hw->open_mutex);
+ struct snd_hwdep *hw = file->private_data;
+ mutex_lock(&hw->open_mutex);
if (hw->ops.release) {
err = hw->ops.release(hw, file);
wake_up(&hw->open_wait);
if (hw->used > 0)
hw->used--;
snd_card_file_remove(hw->card, file);
- up(&hw->open_mutex);
+ mutex_unlock(&hw->open_mutex);
module_put(hw->card->module);
return err;
}
static unsigned int snd_hwdep_poll(struct file * file, poll_table * wait)
{
- snd_hwdep_t *hw = file->private_data;
+ struct snd_hwdep *hw = file->private_data;
if (hw->ops.poll)
return hw->ops.poll(hw, file, wait);
return 0;
}
-static int snd_hwdep_info(snd_hwdep_t *hw, snd_hwdep_info_t __user *_info)
+static int snd_hwdep_info(struct snd_hwdep *hw,
+ struct snd_hwdep_info __user *_info)
{
- snd_hwdep_info_t info;
+ struct snd_hwdep_info info;
memset(&info, 0, sizeof(info));
info.card = hw->card->number;
return 0;
}
-static int snd_hwdep_dsp_status(snd_hwdep_t *hw, snd_hwdep_dsp_status_t __user *_info)
+static int snd_hwdep_dsp_status(struct snd_hwdep *hw,
+ struct snd_hwdep_dsp_status __user *_info)
{
- snd_hwdep_dsp_status_t info;
+ struct snd_hwdep_dsp_status info;
int err;
if (! hw->ops.dsp_status)
return 0;
}
-static int snd_hwdep_dsp_load(snd_hwdep_t *hw, snd_hwdep_dsp_image_t __user *_info)
+static int snd_hwdep_dsp_load(struct snd_hwdep *hw,
+ struct snd_hwdep_dsp_image __user *_info)
{
- snd_hwdep_dsp_image_t info;
+ struct snd_hwdep_dsp_image info;
int err;
if (! hw->ops.dsp_load)
return 0;
}
-static long snd_hwdep_ioctl(struct file * file, unsigned int cmd, unsigned long arg)
+static long snd_hwdep_ioctl(struct file * file, unsigned int cmd,
+ unsigned long arg)
{
- snd_hwdep_t *hw = file->private_data;
+ struct snd_hwdep *hw = file->private_data;
void __user *argp = (void __user *)arg;
switch (cmd) {
case SNDRV_HWDEP_IOCTL_PVERSION:
static int snd_hwdep_mmap(struct file * file, struct vm_area_struct * vma)
{
- snd_hwdep_t *hw = file->private_data;
+ struct snd_hwdep *hw = file->private_data;
if (hw->ops.mmap)
return hw->ops.mmap(hw, file, vma);
return -ENXIO;
}
-static int snd_hwdep_control_ioctl(snd_card_t * card, snd_ctl_file_t * control,
+static int snd_hwdep_control_ioctl(struct snd_card *card,
+ struct snd_ctl_file * control,
unsigned int cmd, unsigned long arg)
{
- unsigned int tmp;
-
- tmp = card->number * SNDRV_MINOR_HWDEPS;
switch (cmd) {
case SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE:
{
if (get_user(device, (int __user *)arg))
return -EFAULT;
+ mutex_lock(®ister_mutex);
device = device < 0 ? 0 : device + 1;
while (device < SNDRV_MINOR_HWDEPS) {
- if (snd_hwdep_devices[tmp + device])
+ if (snd_hwdep_search(card, device))
break;
device++;
}
if (device >= SNDRV_MINOR_HWDEPS)
device = -1;
+ mutex_unlock(®ister_mutex);
if (put_user(device, (int __user *)arg))
return -EFAULT;
return 0;
}
case SNDRV_CTL_IOCTL_HWDEP_INFO:
{
- snd_hwdep_info_t __user *info = (snd_hwdep_info_t __user *)arg;
- int device;
- snd_hwdep_t *hwdep;
+ struct snd_hwdep_info __user *info = (struct snd_hwdep_info __user *)arg;
+ int device, err;
+ struct snd_hwdep *hwdep;
if (get_user(device, &info->device))
return -EFAULT;
- if (device < 0 || device >= SNDRV_MINOR_HWDEPS)
- return -ENXIO;
- hwdep = snd_hwdep_devices[tmp + device];
- if (hwdep == NULL)
- return -ENXIO;
- return snd_hwdep_info(hwdep, info);
+ mutex_lock(®ister_mutex);
+ hwdep = snd_hwdep_search(card, device);
+ if (hwdep)
+ err = snd_hwdep_info(hwdep, info);
+ else
+ err = -ENXIO;
+ mutex_unlock(®ister_mutex);
+ return err;
}
}
return -ENOIOCTLCMD;
.mmap = snd_hwdep_mmap,
};
-static snd_minor_t snd_hwdep_reg =
-{
- .comment = "hardware dependent",
- .f_ops = &snd_hwdep_f_ops,
-};
-
/**
* snd_hwdep_new - create a new hwdep instance
* @card: the card instance
*
* Returns zero if successful, or a negative error code on failure.
*/
-int snd_hwdep_new(snd_card_t * card, char *id, int device, snd_hwdep_t ** rhwdep)
+int snd_hwdep_new(struct snd_card *card, char *id, int device,
+ struct snd_hwdep **rhwdep)
{
- snd_hwdep_t *hwdep;
+ struct snd_hwdep *hwdep;
int err;
- static snd_device_ops_t ops = {
+ static struct snd_device_ops ops = {
.dev_free = snd_hwdep_dev_free,
.dev_register = snd_hwdep_dev_register,
.dev_unregister = snd_hwdep_dev_unregister
snd_assert(rhwdep != NULL, return -EINVAL);
*rhwdep = NULL;
snd_assert(card != NULL, return -ENXIO);
- hwdep = kcalloc(1, sizeof(*hwdep), GFP_KERNEL);
- if (hwdep == NULL)
+ hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL);
+ if (hwdep == NULL) {
+ snd_printk(KERN_ERR "hwdep: cannot allocate\n");
return -ENOMEM;
+ }
hwdep->card = card;
hwdep->device = device;
- if (id) {
+ if (id)
strlcpy(hwdep->id, id, sizeof(hwdep->id));
- }
#ifdef CONFIG_SND_OSSEMUL
hwdep->oss_type = -1;
#endif
return err;
}
init_waitqueue_head(&hwdep->open_wait);
- init_MUTEX(&hwdep->open_mutex);
+ mutex_init(&hwdep->open_mutex);
*rhwdep = hwdep;
return 0;
}
-static int snd_hwdep_free(snd_hwdep_t *hwdep)
+static int snd_hwdep_free(struct snd_hwdep *hwdep)
{
snd_assert(hwdep != NULL, return -ENXIO);
if (hwdep->private_free)
return 0;
}
-static int snd_hwdep_dev_free(snd_device_t *device)
+static int snd_hwdep_dev_free(struct snd_device *device)
{
- snd_hwdep_t *hwdep = device->device_data;
+ struct snd_hwdep *hwdep = device->device_data;
return snd_hwdep_free(hwdep);
}
-static int snd_hwdep_dev_register(snd_device_t *device)
+static int snd_hwdep_dev_register(struct snd_device *device)
{
- snd_hwdep_t *hwdep = device->device_data;
- int idx, err;
+ struct snd_hwdep *hwdep = device->device_data;
+ int err;
char name[32];
- down(®ister_mutex);
- idx = (hwdep->card->number * SNDRV_MINOR_HWDEPS) + hwdep->device;
- if (snd_hwdep_devices[idx]) {
- up(®ister_mutex);
+ mutex_lock(®ister_mutex);
+ if (snd_hwdep_search(hwdep->card, hwdep->device)) {
+ mutex_unlock(®ister_mutex);
return -EBUSY;
}
- snd_hwdep_devices[idx] = hwdep;
+ list_add_tail(&hwdep->list, &snd_hwdep_devices);
sprintf(name, "hwC%iD%i", hwdep->card->number, hwdep->device);
if ((err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP,
hwdep->card, hwdep->device,
- &snd_hwdep_reg, name)) < 0) {
+ &snd_hwdep_f_ops, hwdep, name)) < 0) {
snd_printk(KERN_ERR "unable to register hardware dependent device %i:%i\n",
hwdep->card->number, hwdep->device);
- snd_hwdep_devices[idx] = NULL;
- up(®ister_mutex);
+ list_del(&hwdep->list);
+ mutex_unlock(®ister_mutex);
return err;
}
#ifdef CONFIG_SND_OSSEMUL
} else {
if (snd_register_oss_device(hwdep->oss_type,
hwdep->card, hwdep->device,
- &snd_hwdep_reg, hwdep->oss_dev) < 0) {
+ &snd_hwdep_f_ops, hwdep,
+ hwdep->oss_dev) < 0) {
snd_printk(KERN_ERR "unable to register OSS compatibility device %i:%i\n",
hwdep->card->number, hwdep->device);
} else
}
}
#endif
- up(®ister_mutex);
+ mutex_unlock(®ister_mutex);
return 0;
}
-static int snd_hwdep_dev_unregister(snd_device_t *device)
+static int snd_hwdep_dev_unregister(struct snd_device *device)
{
- snd_hwdep_t *hwdep = device->device_data;
- int idx;
+ struct snd_hwdep *hwdep = device->device_data;
snd_assert(hwdep != NULL, return -ENXIO);
- down(®ister_mutex);
- idx = (hwdep->card->number * SNDRV_MINOR_HWDEPS) + hwdep->device;
- if (snd_hwdep_devices[idx] != hwdep) {
- up(®ister_mutex);
+ mutex_lock(®ister_mutex);
+ if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) {
+ mutex_unlock(®ister_mutex);
return -EINVAL;
}
#ifdef CONFIG_SND_OSSEMUL
snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device);
#endif
snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device);
- snd_hwdep_devices[idx] = NULL;
- up(®ister_mutex);
+ list_del(&hwdep->list);
+ mutex_unlock(®ister_mutex);
return snd_hwdep_free(hwdep);
}
+#ifdef CONFIG_PROC_FS
/*
* Info interface
*/
-static void snd_hwdep_proc_read(snd_info_entry_t *entry,
- snd_info_buffer_t * buffer)
+static void snd_hwdep_proc_read(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
{
- int idx;
- snd_hwdep_t *hwdep;
-
- down(®ister_mutex);
- for (idx = 0; idx < SNDRV_CARDS * SNDRV_MINOR_HWDEPS; idx++) {
- hwdep = snd_hwdep_devices[idx];
- if (hwdep == NULL)
- continue;
+ struct list_head *p;
+ struct snd_hwdep *hwdep;
+
+ mutex_lock(®ister_mutex);
+ list_for_each(p, &snd_hwdep_devices) {
+ hwdep = list_entry(p, struct snd_hwdep, list);
snd_iprintf(buffer, "%02i-%02i: %s\n",
- idx / SNDRV_MINOR_HWDEPS,
- idx % SNDRV_MINOR_HWDEPS,
- hwdep->name);
+ hwdep->card->number, hwdep->device, hwdep->name);
}
- up(®ister_mutex);
+ mutex_unlock(®ister_mutex);
}
-/*
- * ENTRY functions
- */
+static struct snd_info_entry *snd_hwdep_proc_entry;
-static snd_info_entry_t *snd_hwdep_proc_entry = NULL;
-
-static int __init alsa_hwdep_init(void)
+static void __init snd_hwdep_proc_init(void)
{
- snd_info_entry_t *entry;
+ struct snd_info_entry *entry;
- memset(snd_hwdep_devices, 0, sizeof(snd_hwdep_devices));
if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) {
- entry->c.text.read_size = 512;
+ entry->c.text.read_size = PAGE_SIZE;
entry->c.text.read = snd_hwdep_proc_read;
if (snd_info_register(entry) < 0) {
snd_info_free_entry(entry);
}
}
snd_hwdep_proc_entry = entry;
+}
+
+static void __exit snd_hwdep_proc_done(void)
+{
+ snd_info_unregister(snd_hwdep_proc_entry);
+}
+#else /* !CONFIG_PROC_FS */
+#define snd_hwdep_proc_init()
+#define snd_hwdep_proc_done()
+#endif /* CONFIG_PROC_FS */
+
+
+/*
+ * ENTRY functions
+ */
+
+static int __init alsa_hwdep_init(void)
+{
+ snd_hwdep_proc_init();
snd_ctl_register_ioctl(snd_hwdep_control_ioctl);
snd_ctl_register_ioctl_compat(snd_hwdep_control_ioctl);
return 0;
{
snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl);
snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl);
- if (snd_hwdep_proc_entry) {
- snd_info_unregister(snd_hwdep_proc_entry);
- snd_hwdep_proc_entry = NULL;
- }
+ snd_hwdep_proc_done();
}
module_init(alsa_hwdep_init)
git://git.onelab.eu / linux-2.6.git / blobdiff