[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / core / hwdep.c

/*
 *  Hardware dependent layer
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <linux/major.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/mutex.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/minors.h>
#include <sound/hwdep.h>
#include <sound/info.h>

MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("Hardware dependent layer");
MODULE_LICENSE("GPL");

static LIST_HEAD(snd_hwdep_devices);
static DEFINE_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_disconnect(struct snd_device *device);


static struct snd_hwdep *snd_hwdep_search(struct snd_card *card, int device)
{
	struct snd_hwdep *hwdep;

	list_for_each_entry(hwdep, &snd_hwdep_devices, 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)
{
	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)
{
	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)
{
	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);
	struct snd_hwdep *hw;
	int err;
	wait_queue_t wait;

	if (major == snd_major) {
		hw = snd_lookup_minor_data(iminor(inode),
					   SNDRV_DEVICE_TYPE_HWDEP);
#ifdef CONFIG_SND_OSSEMUL
	} else if (major == SOUND_MAJOR) {
		hw = snd_lookup_oss_minor_data(iminor(inode),
					       SNDRV_OSS_DEVICE_TYPE_DMFM);
#endif
	} else
		return -ENXIO;
	if (hw == NULL)
		return -ENODEV;

	if (!try_module_get(hw->card->module)) {
		snd_card_unref(hw->card);
		return -EFAULT;
	}

	init_waitqueue_entry(&wait, current);
	add_wait_queue(&hw->open_wait, &wait);
	mutex_lock(&hw->open_mutex);
	while (1) {
		if (hw->exclusive && hw->used > 0) {
			err = -EBUSY;
			break;
		}
		if (!hw->ops.open) {
			err = 0;
			break;
		}
		err = hw->ops.open(hw, file);
		if (err >= 0)
			break;
		if (err == -EAGAIN) {
			if (file->f_flags & O_NONBLOCK) {
				err = -EBUSY;
				break;
			}
		} else
			break;
		set_current_state(TASK_INTERRUPTIBLE);
		mutex_unlock(&hw->open_mutex);
		schedule();
		mutex_lock(&hw->open_mutex);
		if (hw->card->shutdown) {
			err = -ENODEV;
			break;
		}
		if (signal_pending(current)) {
			err = -ERESTARTSYS;
			break;
		}
	}
	remove_wait_queue(&hw->open_wait, &wait);
	if (err >= 0) {
		err = snd_card_file_add(hw->card, file);
		if (err >= 0) {
			file->private_data = hw;
			hw->used++;
		} else {
			if (hw->ops.release)
				hw->ops.release(hw, file);
		}
	}
	mutex_unlock(&hw->open_mutex);
	if (err < 0)
		module_put(hw->card->module);
	snd_card_unref(hw->card);
	return err;
}

static int snd_hwdep_release(struct inode *inode, struct file * file)
{
	int err = 0;
	struct snd_hwdep *hw = file->private_data;
	struct module *mod = hw->card->module;

	mutex_lock(&hw->open_mutex);
	if (hw->ops.release)
		err = hw->ops.release(hw, file);
	if (hw->used > 0)
		hw->used--;
	mutex_unlock(&hw->open_mutex);
	wake_up(&hw->open_wait);

	snd_card_file_remove(hw->card, file);
	module_put(mod);
	return err;
}

static unsigned int snd_hwdep_poll(struct file * file, poll_table * wait)
{
	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(struct snd_hwdep *hw,
			  struct snd_hwdep_info __user *_info)
{
	struct snd_hwdep_info info;
	
	memset(&info, 0, sizeof(info));
	info.card = hw->card->number;
	strlcpy(info.id, hw->id, sizeof(info.id));	
	strlcpy(info.name, hw->name, sizeof(info.name));
	info.iface = hw->iface;
	if (copy_to_user(_info, &info, sizeof(info)))
		return -EFAULT;
	return 0;
}

static int snd_hwdep_dsp_status(struct snd_hwdep *hw,
				struct snd_hwdep_dsp_status __user *_info)
{
	struct snd_hwdep_dsp_status info;
	int err;
	
	if (! hw->ops.dsp_status)
		return -ENXIO;
	memset(&info, 0, sizeof(info));
	info.dsp_loaded = hw->dsp_loaded;
	if ((err = hw->ops.dsp_status(hw, &info)) < 0)
		return err;
	if (copy_to_user(_info, &info, sizeof(info)))
		return -EFAULT;
	return 0;
}

static int snd_hwdep_dsp_load(struct snd_hwdep *hw,
			      struct snd_hwdep_dsp_image __user *_info)
{
	struct snd_hwdep_dsp_image info;
	int err;
	
	if (! hw->ops.dsp_load)
		return -ENXIO;
	memset(&info, 0, sizeof(info));
	if (copy_from_user(&info, _info, sizeof(info)))
		return -EFAULT;
	/* check whether the dsp was already loaded */
	if (hw->dsp_loaded & (1 << info.index))
		return -EBUSY;
	if (!access_ok(VERIFY_READ, info.image, info.length))
		return -EFAULT;
	err = hw->ops.dsp_load(hw, &info);
	if (err < 0)
		return err;
	hw->dsp_loaded |= (1 << info.index);
	return 0;
}

static long snd_hwdep_ioctl(struct file * file, unsigned int cmd,
			    unsigned long arg)
{
	struct snd_hwdep *hw = file->private_data;
	void __user *argp = (void __user *)arg;
	switch (cmd) {
	case SNDRV_HWDEP_IOCTL_PVERSION:
		return put_user(SNDRV_HWDEP_VERSION, (int __user *)argp);
	case SNDRV_HWDEP_IOCTL_INFO:
		return snd_hwdep_info(hw, argp);
	case SNDRV_HWDEP_IOCTL_DSP_STATUS:
		return snd_hwdep_dsp_status(hw, argp);
	case SNDRV_HWDEP_IOCTL_DSP_LOAD:
		return snd_hwdep_dsp_load(hw, argp);
	}
	if (hw->ops.ioctl)
		return hw->ops.ioctl(hw, file, cmd, arg);
	return -ENOTTY;
}

static int snd_hwdep_mmap(struct file * file, struct vm_area_struct * vma)
{
	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(struct snd_card *card,
				   struct snd_ctl_file * control,
				   unsigned int cmd, unsigned long arg)
{
	switch (cmd) {
	case SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE:
		{
			int device;

			if (get_user(device, (int __user *)arg))
				return -EFAULT;
			mutex_lock(&register_mutex);

			if (device < 0)
				device = 0;
			else if (device < SNDRV_MINOR_HWDEPS)
				device++;
			else
				device = SNDRV_MINOR_HWDEPS;

			while (device < SNDRV_MINOR_HWDEPS) {
				if (snd_hwdep_search(card, device))
					break;
				device++;
			}
			if (device >= SNDRV_MINOR_HWDEPS)
				device = -1;
			mutex_unlock(&register_mutex);
			if (put_user(device, (int __user *)arg))
				return -EFAULT;
			return 0;
		}
	case SNDRV_CTL_IOCTL_HWDEP_INFO:
		{
			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;
			mutex_lock(&register_mutex);
			hwdep = snd_hwdep_search(card, device);
			if (hwdep)
				err = snd_hwdep_info(hwdep, info);
			else
				err = -ENXIO;
			mutex_unlock(&register_mutex);
			return err;
		}
	}
	return -ENOIOCTLCMD;
}

#ifdef CONFIG_COMPAT
#include "hwdep_compat.c"
#else
#define snd_hwdep_ioctl_compat	NULL
#endif

/*

 */

static const struct file_operations snd_hwdep_f_ops =
{
	.owner = 	THIS_MODULE,
	.llseek =	snd_hwdep_llseek,
	.read = 	snd_hwdep_read,
	.write =	snd_hwdep_write,
	.open =		snd_hwdep_open,
	.release =	snd_hwdep_release,
	.poll =		snd_hwdep_poll,
	.unlocked_ioctl =	snd_hwdep_ioctl,
	.compat_ioctl =	snd_hwdep_ioctl_compat,
	.mmap =		snd_hwdep_mmap,
};

/**
 * snd_hwdep_new - create a new hwdep instance
 * @card: the card instance
 * @id: the id string
 * @device: the device index (zero-based)
 * @rhwdep: the pointer to store the new hwdep instance
 *
 * Creates a new hwdep instance with the given index on the card.
 * The callbacks (hwdep->ops) must be set on the returned instance
 * after this call manually by the caller.
 *
 * Return: Zero if successful, or a negative error code on failure.
 */
int snd_hwdep_new(struct snd_card *card, char *id, int device,
		  struct snd_hwdep **rhwdep)
{
	struct snd_hwdep *hwdep;
	int err;
	static struct snd_device_ops ops = {
		.dev_free = snd_hwdep_dev_free,
		.dev_register = snd_hwdep_dev_register,
		.dev_disconnect = snd_hwdep_dev_disconnect,
	};

	if (snd_BUG_ON(!card))
		return -ENXIO;
	if (rhwdep)
		*rhwdep = 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)
		strlcpy(hwdep->id, id, sizeof(hwdep->id));
#ifdef CONFIG_SND_OSSEMUL
	hwdep->oss_type = -1;
#endif
	if ((err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops)) < 0) {
		snd_hwdep_free(hwdep);
		return err;
	}
	init_waitqueue_head(&hwdep->open_wait);
	mutex_init(&hwdep->open_mutex);
	if (rhwdep)
		*rhwdep = hwdep;
	return 0;
}

static int snd_hwdep_free(struct snd_hwdep *hwdep)
{
	if (!hwdep)
		return 0;
	if (hwdep->private_free)
		hwdep->private_free(hwdep);
	kfree(hwdep);
	return 0;
}

static int snd_hwdep_dev_free(struct snd_device *device)
{
	struct snd_hwdep *hwdep = device->device_data;
	return snd_hwdep_free(hwdep);
}

static int snd_hwdep_dev_register(struct snd_device *device)
{
	struct snd_hwdep *hwdep = device->device_data;
	int err;
	char name[32];

	mutex_lock(&register_mutex);
	if (snd_hwdep_search(hwdep->card, hwdep->device)) {
		mutex_unlock(&register_mutex);
		return -EBUSY;
	}
	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_f_ops, hwdep, name)) < 0) {
		snd_printk(KERN_ERR "unable to register hardware dependent device %i:%i\n",
			   hwdep->card->number, hwdep->device);
		list_del(&hwdep->list);
		mutex_unlock(&register_mutex);
		return err;
	}
#ifdef CONFIG_SND_OSSEMUL
	hwdep->ossreg = 0;
	if (hwdep->oss_type >= 0) {
		if ((hwdep->oss_type == SNDRV_OSS_DEVICE_TYPE_DMFM) && (hwdep->device != 0)) {
			snd_printk (KERN_WARNING "only hwdep device 0 can be registered as OSS direct FM device!\n");
		} else {
			if (snd_register_oss_device(hwdep->oss_type,
						    hwdep->card, hwdep->device,
						    &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
				hwdep->ossreg = 1;
		}
	}
#endif
	mutex_unlock(&register_mutex);
	return 0;
}

static int snd_hwdep_dev_disconnect(struct snd_device *device)
{
	struct snd_hwdep *hwdep = device->device_data;

	if (snd_BUG_ON(!hwdep))
		return -ENXIO;
	mutex_lock(&register_mutex);
	if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) {
		mutex_unlock(&register_mutex);
		return -EINVAL;
	}
	mutex_lock(&hwdep->open_mutex);
	wake_up(&hwdep->open_wait);
#ifdef CONFIG_SND_OSSEMUL
	if (hwdep->ossreg)
		snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device);
#endif
	snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device);
	list_del_init(&hwdep->list);
	mutex_unlock(&hwdep->open_mutex);
	mutex_unlock(&register_mutex);
	return 0;
}

#ifdef CONFIG_PROC_FS
/*
 *  Info interface
 */

static void snd_hwdep_proc_read(struct snd_info_entry *entry,
				struct snd_info_buffer *buffer)
{
	struct snd_hwdep *hwdep;

	mutex_lock(&register_mutex);
	list_for_each_entry(hwdep, &snd_hwdep_devices, list)
		snd_iprintf(buffer, "%02i-%02i: %s\n",
			    hwdep->card->number, hwdep->device, hwdep->name);
	mutex_unlock(&register_mutex);
}

static struct snd_info_entry *snd_hwdep_proc_entry;

static void __init snd_hwdep_proc_init(void)
{
	struct snd_info_entry *entry;

	if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) {
		entry->c.text.read = snd_hwdep_proc_read;
		if (snd_info_register(entry) < 0) {
			snd_info_free_entry(entry);
			entry = NULL;
		}
	}
	snd_hwdep_proc_entry = entry;
}

static void __exit snd_hwdep_proc_done(void)
{
	snd_info_free_entry(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;
}

static void __exit alsa_hwdep_exit(void)
{
	snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl);
	snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl);
	snd_hwdep_proc_done();
}

module_init(alsa_hwdep_init)
module_exit(alsa_hwdep_exit)

EXPORT_SYMBOL(snd_hwdep_new);
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* Hardware dependent layer
c1017a4c	3	* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4 LT	4	*
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*
	20	*/
	21
1da177e4 LT	22	#include <linux/major.h>
1da177e4 LT	23	#include <linux/init.h>
1da177e4 LT	24	#include <linux/slab.h>
1da177e4 LT	25	#include <linux/time.h>
1a60d4c5	26	#include <linux/mutex.h>
da155d5b	27	#include <linux/module.h>
1da177e4 LT	28	#include <sound/core.h>
	29	#include <sound/control.h>
	30	#include <sound/minors.h>
	31	#include <sound/hwdep.h>
	32	#include <sound/info.h>
	33
c1017a4c	34	MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
1da177e4 LT	35	MODULE_DESCRIPTION("Hardware dependent layer");
	36	MODULE_LICENSE("GPL");
	37
f87135f5	38	static LIST_HEAD(snd_hwdep_devices);
1a60d4c5	39	static DEFINE_MUTEX(register_mutex);
1da177e4	40
d9a98de2 TI	41	static int snd_hwdep_free(struct snd_hwdep *hwdep);
	42	static int snd_hwdep_dev_free(struct snd_device *device);
	43	static int snd_hwdep_dev_register(struct snd_device *device);
c461482c	44	static int snd_hwdep_dev_disconnect(struct snd_device *device);
1da177e4	45
1da177e4	46
f87135f5 CL	47	static struct snd_hwdep snd_hwdep_search(struct snd_card card, int device)
f87135f5 CL	48	{
f87135f5 CL	49	struct snd_hwdep *hwdep;
f87135f5 CL	50
9244b2c3	51	list_for_each_entry(hwdep, &snd_hwdep_devices, list)
f87135f5 CL	52	if (hwdep->card == card && hwdep->device == device)
f87135f5 CL	53	return hwdep;
f87135f5 CL	54	return NULL;
f87135f5 CL	55	}
1da177e4 LT	56
	57	static loff_t snd_hwdep_llseek(struct file * file, loff_t offset, int orig)
	58	{
d9a98de2	59	struct snd_hwdep *hw = file->private_data;
1da177e4 LT	60	if (hw->ops.llseek)
	61	return hw->ops.llseek(hw, file, offset, orig);
	62	return -ENXIO;
	63	}
	64
d9a98de2 TI	65	static ssize_t snd_hwdep_read(struct file * file, char __user *buf,
d9a98de2 TI	66	size_t count, loff_t *offset)
1da177e4	67	{
d9a98de2	68	struct snd_hwdep *hw = file->private_data;
1da177e4 LT	69	if (hw->ops.read)
	70	return hw->ops.read(hw, buf, count, offset);
	71	return -ENXIO;
	72	}
	73
d9a98de2 TI	74	static ssize_t snd_hwdep_write(struct file * file, const char __user *buf,
d9a98de2 TI	75	size_t count, loff_t *offset)
1da177e4	76	{
d9a98de2	77	struct snd_hwdep *hw = file->private_data;
1da177e4 LT	78	if (hw->ops.write)
	79	return hw->ops.write(hw, buf, count, offset);
	80	return -ENXIO;
	81	}
	82
	83	static int snd_hwdep_open(struct inode inode, struct file file)
	84	{
	85	int major = imajor(inode);
d9a98de2	86	struct snd_hwdep *hw;
1da177e4 LT	87	int err;
	88	wait_queue_t wait;
	89
f1902860	90	if (major == snd_major) {
f87135f5 CL	91	hw = snd_lookup_minor_data(iminor(inode),
f87135f5 CL	92	SNDRV_DEVICE_TYPE_HWDEP);
1da177e4	93	#ifdef CONFIG_SND_OSSEMUL
f1902860	94	} else if (major == SOUND_MAJOR) {
f87135f5 CL	95	hw = snd_lookup_oss_minor_data(iminor(inode),
f87135f5 CL	96	SNDRV_OSS_DEVICE_TYPE_DMFM);
1da177e4	97	#endif
f1902860	98	} else
1da177e4	99	return -ENXIO;
1da177e4 LT	100	if (hw == NULL)
	101	return -ENODEV;
	102
a0830dbd TI	103	if (!try_module_get(hw->card->module)) {
a0830dbd TI	104	snd_card_unref(hw->card);
1da177e4	105	return -EFAULT;
a0830dbd	106	}
1da177e4 LT	107
	108	init_waitqueue_entry(&wait, current);
	109	add_wait_queue(&hw->open_wait, &wait);
1a60d4c5	110	mutex_lock(&hw->open_mutex);
1da177e4 LT	111	while (1) {
	112	if (hw->exclusive && hw->used > 0) {
	113	err = -EBUSY;
	114	break;
	115	}
345d0b19 TI	116	if (!hw->ops.open) {
	117	err = 0;
	118	break;
	119	}
1da177e4 LT	120	err = hw->ops.open(hw, file);
	121	if (err >= 0)
	122	break;
	123	if (err == -EAGAIN) {
	124	if (file->f_flags & O_NONBLOCK) {
	125	err = -EBUSY;
	126	break;
	127	}
	128	} else
	129	break;
	130	set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5	131	mutex_unlock(&hw->open_mutex);
1da177e4	132	schedule();
1a60d4c5	133	mutex_lock(&hw->open_mutex);
0914f796 TI	134	if (hw->card->shutdown) {
	135	err = -ENODEV;
	136	break;
	137	}
1da177e4 LT	138	if (signal_pending(current)) {
	139	err = -ERESTARTSYS;
	140	break;
	141	}
	142	}
	143	remove_wait_queue(&hw->open_wait, &wait);
	144	if (err >= 0) {
	145	err = snd_card_file_add(hw->card, file);
	146	if (err >= 0) {
	147	file->private_data = hw;
	148	hw->used++;
	149	} else {
	150	if (hw->ops.release)
	151	hw->ops.release(hw, file);
	152	}
	153	}
1a60d4c5	154	mutex_unlock(&hw->open_mutex);
1da177e4 LT	155	if (err < 0)
1da177e4 LT	156	module_put(hw->card->module);
a0830dbd	157	snd_card_unref(hw->card);
1da177e4 LT	158	return err;
	159	}
	160
	161	static int snd_hwdep_release(struct inode inode, struct file file)
	162	{
345d0b19	163	int err = 0;
d9a98de2	164	struct snd_hwdep *hw = file->private_data;
104326f8	165	struct module *mod = hw->card->module;
8fa58af7	166
1a60d4c5	167	mutex_lock(&hw->open_mutex);
8fa58af7	168	if (hw->ops.release)
1da177e4	169	err = hw->ops.release(hw, file);
1da177e4 LT	170	if (hw->used > 0)
1da177e4 LT	171	hw->used--;
1a60d4c5	172	mutex_unlock(&hw->open_mutex);
8fa58af7 KW	173	wake_up(&hw->open_wait);
	174
	175	snd_card_file_remove(hw->card, file);
104326f8	176	module_put(mod);
1da177e4 LT	177	return err;
	178	}
	179
	180	static unsigned int snd_hwdep_poll(struct file * file, poll_table * wait)
	181	{
d9a98de2	182	struct snd_hwdep *hw = file->private_data;
1da177e4 LT	183	if (hw->ops.poll)
	184	return hw->ops.poll(hw, file, wait);
	185	return 0;
	186	}
	187
d9a98de2 TI	188	static int snd_hwdep_info(struct snd_hwdep *hw,
d9a98de2 TI	189	struct snd_hwdep_info __user *_info)
1da177e4	190	{
d9a98de2	191	struct snd_hwdep_info info;
1da177e4 LT	192
	193	memset(&info, 0, sizeof(info));
	194	info.card = hw->card->number;
	195	strlcpy(info.id, hw->id, sizeof(info.id));
	196	strlcpy(info.name, hw->name, sizeof(info.name));
	197	info.iface = hw->iface;
	198	if (copy_to_user(_info, &info, sizeof(info)))
	199	return -EFAULT;
	200	return 0;
	201	}
	202
d9a98de2 TI	203	static int snd_hwdep_dsp_status(struct snd_hwdep *hw,
d9a98de2 TI	204	struct snd_hwdep_dsp_status __user *_info)
1da177e4	205	{
d9a98de2	206	struct snd_hwdep_dsp_status info;
1da177e4 LT	207	int err;
	208
	209	if (! hw->ops.dsp_status)
	210	return -ENXIO;
	211	memset(&info, 0, sizeof(info));
	212	info.dsp_loaded = hw->dsp_loaded;
	213	if ((err = hw->ops.dsp_status(hw, &info)) < 0)
	214	return err;
	215	if (copy_to_user(_info, &info, sizeof(info)))
	216	return -EFAULT;
	217	return 0;
	218	}
	219
d9a98de2 TI	220	static int snd_hwdep_dsp_load(struct snd_hwdep *hw,
d9a98de2 TI	221	struct snd_hwdep_dsp_image __user *_info)
1da177e4	222	{
d9a98de2	223	struct snd_hwdep_dsp_image info;
1da177e4 LT	224	int err;
	225
	226	if (! hw->ops.dsp_load)
	227	return -ENXIO;
	228	memset(&info, 0, sizeof(info));
	229	if (copy_from_user(&info, _info, sizeof(info)))
	230	return -EFAULT;
	231	/* check whether the dsp was already loaded */
	232	if (hw->dsp_loaded & (1 << info.index))
	233	return -EBUSY;
	234	if (!access_ok(VERIFY_READ, info.image, info.length))
	235	return -EFAULT;
	236	err = hw->ops.dsp_load(hw, &info);
	237	if (err < 0)
	238	return err;
	239	hw->dsp_loaded \|= (1 << info.index);
	240	return 0;
	241	}
	242
d9a98de2 TI	243	static long snd_hwdep_ioctl(struct file * file, unsigned int cmd,
d9a98de2 TI	244	unsigned long arg)
1da177e4	245	{
d9a98de2	246	struct snd_hwdep *hw = file->private_data;
1da177e4 LT	247	void __user argp = (void __user )arg;
	248	switch (cmd) {
	249	case SNDRV_HWDEP_IOCTL_PVERSION:
	250	return put_user(SNDRV_HWDEP_VERSION, (int __user *)argp);
	251	case SNDRV_HWDEP_IOCTL_INFO:
	252	return snd_hwdep_info(hw, argp);
	253	case SNDRV_HWDEP_IOCTL_DSP_STATUS:
	254	return snd_hwdep_dsp_status(hw, argp);
	255	case SNDRV_HWDEP_IOCTL_DSP_LOAD:
	256	return snd_hwdep_dsp_load(hw, argp);
	257	}
	258	if (hw->ops.ioctl)
	259	return hw->ops.ioctl(hw, file, cmd, arg);
	260	return -ENOTTY;
	261	}
	262
	263	static int snd_hwdep_mmap(struct file * file, struct vm_area_struct * vma)
	264	{
d9a98de2	265	struct snd_hwdep *hw = file->private_data;
1da177e4 LT	266	if (hw->ops.mmap)
	267	return hw->ops.mmap(hw, file, vma);
	268	return -ENXIO;
	269	}
	270
d9a98de2 TI	271	static int snd_hwdep_control_ioctl(struct snd_card *card,
d9a98de2 TI	272	struct snd_ctl_file * control,
1da177e4 LT	273	unsigned int cmd, unsigned long arg)
1da177e4 LT	274	{
1da177e4 LT	275	switch (cmd) {
	276	case SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE:
	277	{
	278	int device;
	279
	280	if (get_user(device, (int __user *)arg))
	281	return -EFAULT;
1a60d4c5	282	mutex_lock(&register_mutex);
f7b2bb85 DC	283
	284	if (device < 0)
	285	device = 0;
	286	else if (device < SNDRV_MINOR_HWDEPS)
	287	device++;
	288	else
	289	device = SNDRV_MINOR_HWDEPS;
	290
1da177e4	291	while (device < SNDRV_MINOR_HWDEPS) {
f87135f5	292	if (snd_hwdep_search(card, device))
1da177e4 LT	293	break;
	294	device++;
	295	}
	296	if (device >= SNDRV_MINOR_HWDEPS)
	297	device = -1;
1a60d4c5	298	mutex_unlock(&register_mutex);
1da177e4 LT	299	if (put_user(device, (int __user *)arg))
	300	return -EFAULT;
	301	return 0;
	302	}
	303	case SNDRV_CTL_IOCTL_HWDEP_INFO:
	304	{
d9a98de2	305	struct snd_hwdep_info __user info = (struct snd_hwdep_info __user )arg;
f87135f5	306	int device, err;
d9a98de2	307	struct snd_hwdep *hwdep;
1da177e4 LT	308
	309	if (get_user(device, &info->device))
	310	return -EFAULT;
1a60d4c5	311	mutex_lock(&register_mutex);
f87135f5 CL	312	hwdep = snd_hwdep_search(card, device);
	313	if (hwdep)
	314	err = snd_hwdep_info(hwdep, info);
	315	else
	316	err = -ENXIO;
1a60d4c5	317	mutex_unlock(&register_mutex);
f87135f5	318	return err;
1da177e4 LT	319	}
	320	}
	321	return -ENOIOCTLCMD;
	322	}
	323
	324	#ifdef CONFIG_COMPAT
	325	#include "hwdep_compat.c"
	326	#else
	327	#define snd_hwdep_ioctl_compat NULL
	328	#endif
	329
	330	/*
	331
	332	*/
	333
9c2e08c5	334	static const struct file_operations snd_hwdep_f_ops =
1da177e4 LT	335	{
	336	.owner = THIS_MODULE,
	337	.llseek = snd_hwdep_llseek,
	338	.read = snd_hwdep_read,
	339	.write = snd_hwdep_write,
	340	.open = snd_hwdep_open,
	341	.release = snd_hwdep_release,
	342	.poll = snd_hwdep_poll,
	343	.unlocked_ioctl = snd_hwdep_ioctl,
	344	.compat_ioctl = snd_hwdep_ioctl_compat,
	345	.mmap = snd_hwdep_mmap,
	346	};
	347
1da177e4 LT	348	/**
	349	* snd_hwdep_new - create a new hwdep instance
	350	* @card: the card instance
	351	* @id: the id string
	352	* @device: the device index (zero-based)
	353	* @rhwdep: the pointer to store the new hwdep instance
	354	*
	355	* Creates a new hwdep instance with the given index on the card.
	356	* The callbacks (hwdep->ops) must be set on the returned instance
	357	* after this call manually by the caller.
	358	*
eb7c06e8	359	* Return: Zero if successful, or a negative error code on failure.
1da177e4	360	*/
d9a98de2 TI	361	int snd_hwdep_new(struct snd_card card, char id, int device,
d9a98de2 TI	362	struct snd_hwdep **rhwdep)
1da177e4	363	{
d9a98de2	364	struct snd_hwdep *hwdep;
1da177e4	365	int err;
d9a98de2	366	static struct snd_device_ops ops = {
1da177e4 LT	367	.dev_free = snd_hwdep_dev_free,
1da177e4 LT	368	.dev_register = snd_hwdep_dev_register,
c461482c	369	.dev_disconnect = snd_hwdep_dev_disconnect,
1da177e4 LT	370	};
1da177e4 LT	371
7eaa943c TI	372	if (snd_BUG_ON(!card))
	373	return -ENXIO;
	374	if (rhwdep)
	375	*rhwdep = NULL;
ca2c0966	376	hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL);
73e77ba0 TI	377	if (hwdep == NULL) {
73e77ba0 TI	378	snd_printk(KERN_ERR "hwdep: cannot allocate\n");
1da177e4	379	return -ENOMEM;
73e77ba0	380	}
1da177e4 LT	381	hwdep->card = card;
1da177e4 LT	382	hwdep->device = device;
73e77ba0	383	if (id)
1da177e4	384	strlcpy(hwdep->id, id, sizeof(hwdep->id));
1da177e4 LT	385	#ifdef CONFIG_SND_OSSEMUL
	386	hwdep->oss_type = -1;
	387	#endif
	388	if ((err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops)) < 0) {
	389	snd_hwdep_free(hwdep);
	390	return err;
	391	}
	392	init_waitqueue_head(&hwdep->open_wait);
1a60d4c5	393	mutex_init(&hwdep->open_mutex);
7eaa943c TI	394	if (rhwdep)
7eaa943c TI	395	*rhwdep = hwdep;
1da177e4 LT	396	return 0;
	397	}
	398
d9a98de2	399	static int snd_hwdep_free(struct snd_hwdep *hwdep)
1da177e4	400	{
7eaa943c TI	401	if (!hwdep)
7eaa943c TI	402	return 0;
1da177e4 LT	403	if (hwdep->private_free)
	404	hwdep->private_free(hwdep);
	405	kfree(hwdep);
	406	return 0;
	407	}
	408
d9a98de2	409	static int snd_hwdep_dev_free(struct snd_device *device)
1da177e4	410	{
d9a98de2	411	struct snd_hwdep *hwdep = device->device_data;
1da177e4 LT	412	return snd_hwdep_free(hwdep);
	413	}
	414
d9a98de2	415	static int snd_hwdep_dev_register(struct snd_device *device)
1da177e4	416	{
d9a98de2	417	struct snd_hwdep *hwdep = device->device_data;
f87135f5	418	int err;
1da177e4 LT	419	char name[32];
1da177e4 LT	420
1a60d4c5	421	mutex_lock(&register_mutex);
f87135f5	422	if (snd_hwdep_search(hwdep->card, hwdep->device)) {
1a60d4c5	423	mutex_unlock(&register_mutex);
1da177e4 LT	424	return -EBUSY;
1da177e4 LT	425	}
f87135f5	426	list_add_tail(&hwdep->list, &snd_hwdep_devices);
1da177e4 LT	427	sprintf(name, "hwC%iD%i", hwdep->card->number, hwdep->device);
	428	if ((err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP,
	429	hwdep->card, hwdep->device,
f87135f5	430	&snd_hwdep_f_ops, hwdep, name)) < 0) {
1da177e4 LT	431	snd_printk(KERN_ERR "unable to register hardware dependent device %i:%i\n",
1da177e4 LT	432	hwdep->card->number, hwdep->device);
f87135f5	433	list_del(&hwdep->list);
1a60d4c5	434	mutex_unlock(&register_mutex);
1da177e4 LT	435	return err;
	436	}
	437	#ifdef CONFIG_SND_OSSEMUL
	438	hwdep->ossreg = 0;
	439	if (hwdep->oss_type >= 0) {
	440	if ((hwdep->oss_type == SNDRV_OSS_DEVICE_TYPE_DMFM) && (hwdep->device != 0)) {
	441	snd_printk (KERN_WARNING "only hwdep device 0 can be registered as OSS direct FM device!\n");
	442	} else {
	443	if (snd_register_oss_device(hwdep->oss_type,
	444	hwdep->card, hwdep->device,
f87135f5	445	&snd_hwdep_f_ops, hwdep,
2af677fc	446	hwdep->oss_dev) < 0) {
1da177e4 LT	447	snd_printk(KERN_ERR "unable to register OSS compatibility device %i:%i\n",
	448	hwdep->card->number, hwdep->device);
	449	} else
	450	hwdep->ossreg = 1;
	451	}
	452	}
	453	#endif
1a60d4c5	454	mutex_unlock(&register_mutex);
1da177e4 LT	455	return 0;
	456	}
	457
c461482c	458	static int snd_hwdep_dev_disconnect(struct snd_device *device)
1da177e4	459	{
d9a98de2	460	struct snd_hwdep *hwdep = device->device_data;
1da177e4	461
7eaa943c TI	462	if (snd_BUG_ON(!hwdep))
7eaa943c TI	463	return -ENXIO;
1a60d4c5	464	mutex_lock(&register_mutex);
f87135f5	465	if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) {
1a60d4c5	466	mutex_unlock(&register_mutex);
1da177e4 LT	467	return -EINVAL;
1da177e4 LT	468	}
0914f796 TI	469	mutex_lock(&hwdep->open_mutex);
0914f796 TI	470	wake_up(&hwdep->open_wait);
1da177e4 LT	471	#ifdef CONFIG_SND_OSSEMUL
	472	if (hwdep->ossreg)
	473	snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device);
	474	#endif
	475	snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device);
c461482c	476	list_del_init(&hwdep->list);
0914f796	477	mutex_unlock(&hwdep->open_mutex);
1a60d4c5	478	mutex_unlock(&register_mutex);
c461482c	479	return 0;
1da177e4 LT	480	}
1da177e4 LT	481
e28563cc	482	#ifdef CONFIG_PROC_FS
1da177e4 LT	483	/*
	484	* Info interface
	485	*/
	486
d9a98de2 TI	487	static void snd_hwdep_proc_read(struct snd_info_entry *entry,
d9a98de2 TI	488	struct snd_info_buffer *buffer)
1da177e4	489	{
d9a98de2	490	struct snd_hwdep *hwdep;
1da177e4	491
1a60d4c5	492	mutex_lock(&register_mutex);
9244b2c3	493	list_for_each_entry(hwdep, &snd_hwdep_devices, list)
1da177e4	494	snd_iprintf(buffer, "%02i-%02i: %s\n",
f87135f5	495	hwdep->card->number, hwdep->device, hwdep->name);
1a60d4c5	496	mutex_unlock(&register_mutex);
1da177e4 LT	497	}
1da177e4 LT	498
e28563cc	499	static struct snd_info_entry *snd_hwdep_proc_entry;
1da177e4	500
e28563cc	501	static void __init snd_hwdep_proc_init(void)
1da177e4	502	{
d9a98de2	503	struct snd_info_entry *entry;
1da177e4	504
1da177e4	505	if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) {
1da177e4 LT	506	entry->c.text.read = snd_hwdep_proc_read;
	507	if (snd_info_register(entry) < 0) {
	508	snd_info_free_entry(entry);
	509	entry = NULL;
	510	}
	511	}
	512	snd_hwdep_proc_entry = entry;
e28563cc TI	513	}
	514
	515	static void __exit snd_hwdep_proc_done(void)
	516	{
746d4a02	517	snd_info_free_entry(snd_hwdep_proc_entry);
e28563cc TI	518	}
	519	#else /* !CONFIG_PROC_FS */
	520	#define snd_hwdep_proc_init()
	521	#define snd_hwdep_proc_done()
	522	#endif /* CONFIG_PROC_FS */
	523
	524
	525	/*
	526	* ENTRY functions
	527	*/
	528
	529	static int __init alsa_hwdep_init(void)
	530	{
	531	snd_hwdep_proc_init();
1da177e4 LT	532	snd_ctl_register_ioctl(snd_hwdep_control_ioctl);
	533	snd_ctl_register_ioctl_compat(snd_hwdep_control_ioctl);
	534	return 0;
	535	}
	536
	537	static void __exit alsa_hwdep_exit(void)
	538	{
	539	snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl);
	540	snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl);
e28563cc	541	snd_hwdep_proc_done();
1da177e4 LT	542	}
	543
	544	module_init(alsa_hwdep_init)
	545	module_exit(alsa_hwdep_exit)
	546
	547	EXPORT_SYMBOL(snd_hwdep_new);