[mirror_ubuntu-jammy-kernel.git] / drivers / media / video / saa7134 / saa7134-empress.c

/*
 *
 * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/delay.h>

#include "saa7134-reg.h"
#include "saa7134.h"

#include <media/saa6752hs.h>
#include <media/v4l2-common.h>

/* ------------------------------------------------------------------ */

MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
MODULE_LICENSE("GPL");

static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };

module_param_array(empress_nr, int, NULL, 0444);
MODULE_PARM_DESC(empress_nr,"ts device number");

static unsigned int debug = 0;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug,"enable debug messages");

#define dprintk(fmt, arg...)	if (debug)			\
	printk(KERN_DEBUG "%s/empress: " fmt, dev->name , ## arg)

/* ------------------------------------------------------------------ */

static void ts_reset_encoder(struct saa7134_dev* dev)
{
	if (!dev->empress_started)
		return;

	saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
	msleep(10);
	saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
	msleep(100);
	dev->empress_started = 0;
}

static int ts_init_encoder(struct saa7134_dev* dev)
{
	ts_reset_encoder(dev);
	saa7134_i2c_call_clients(dev, VIDIOC_S_MPEGCOMP, NULL);
	dev->empress_started = 1;
	return 0;
}

/* ------------------------------------------------------------------ */

static int ts_open(struct inode *inode, struct file *file)
{
	int minor = iminor(inode);
	struct saa7134_dev *h,*dev = NULL;
	struct list_head *list;
	int err;

	list_for_each(list,&saa7134_devlist) {
		h = list_entry(list, struct saa7134_dev, devlist);
		if (h->empress_dev && h->empress_dev->minor == minor)
			dev = h;
	}
	if (NULL == dev)
		return -ENODEV;

	dprintk("open minor=%d\n",minor);
	err = -EBUSY;
	if (!mutex_trylock(&dev->empress_tsq.lock))
		goto done;
	if (dev->empress_users)
		goto done_up;

	dev->empress_users++;
	file->private_data = dev;
	err = 0;

done_up:
	mutex_unlock(&dev->empress_tsq.lock);
done:
	return err;
}

static int ts_release(struct inode *inode, struct file *file)
{
	struct saa7134_dev *dev = file->private_data;

	if (dev->empress_tsq.streaming)
		videobuf_streamoff(&dev->empress_tsq);
	mutex_lock(&dev->empress_tsq.lock);
	if (dev->empress_tsq.reading)
		videobuf_read_stop(&dev->empress_tsq);
	videobuf_mmap_free(&dev->empress_tsq);
	dev->empress_users--;

	/* stop the encoder */
	ts_reset_encoder(dev);

	mutex_unlock(&dev->empress_tsq.lock);
	return 0;
}

static ssize_t
ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
{
	struct saa7134_dev *dev = file->private_data;

	if (!dev->empress_started)
		ts_init_encoder(dev);

	return videobuf_read_stream(&dev->empress_tsq,
				    data, count, ppos, 0,
				    file->f_flags & O_NONBLOCK);
}

static unsigned int
ts_poll(struct file *file, struct poll_table_struct *wait)
{
	struct saa7134_dev *dev = file->private_data;

	return videobuf_poll_stream(file, &dev->empress_tsq, wait);
}


static int
ts_mmap(struct file *file, struct vm_area_struct * vma)
{
	struct saa7134_dev *dev = file->private_data;

	return videobuf_mmap_mapper(&dev->empress_tsq, vma);
}

/*
 * This function is _not_ called directly, but from
 * video_generic_ioctl (and maybe others).  userspace
 * copying is done already, arg is a kernel pointer.
 */
static int ts_do_ioctl(struct inode *inode, struct file *file,
		       unsigned int cmd, void *arg)
{
	struct saa7134_dev *dev = file->private_data;

	if (debug > 1)
		v4l_print_ioctl(dev->name,cmd);
	switch (cmd) {
	case VIDIOC_QUERYCAP:
	{
		struct v4l2_capability *cap = arg;

		memset(cap,0,sizeof(*cap));
		strcpy(cap->driver, "saa7134");
		strlcpy(cap->card, saa7134_boards[dev->board].name,
			sizeof(cap->card));
		sprintf(cap->bus_info,"PCI:%s",pci_name(dev->pci));
		cap->version = SAA7134_VERSION_CODE;
		cap->capabilities =
			V4L2_CAP_VIDEO_CAPTURE |
			V4L2_CAP_READWRITE |
			V4L2_CAP_STREAMING;
		return 0;
	}

	/* --- input switching --------------------------------------- */
	case VIDIOC_ENUMINPUT:
	{
		struct v4l2_input *i = arg;

		if (i->index != 0)
			return -EINVAL;
		i->type = V4L2_INPUT_TYPE_CAMERA;
		strcpy(i->name,"CCIR656");
		return 0;
	}
	case VIDIOC_G_INPUT:
	{
		int *i = arg;
		*i = 0;
		return 0;
	}
	case VIDIOC_S_INPUT:
	{
		int *i = arg;

		if (*i != 0)
			return -EINVAL;
		return 0;
	}
	/* --- capture ioctls ---------------------------------------- */

	case VIDIOC_ENUM_FMT:
	{
		struct v4l2_fmtdesc *f = arg;
		int index;

		index = f->index;
		if (index != 0)
			return -EINVAL;

		memset(f,0,sizeof(*f));
		f->index = index;
		strlcpy(f->description, "MPEG TS", sizeof(f->description));
		f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
		f->pixelformat = V4L2_PIX_FMT_MPEG;
		return 0;
	}

	case VIDIOC_G_FMT:
	{
		struct v4l2_format *f = arg;

		memset(f,0,sizeof(*f));
		f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;

		saa7134_i2c_call_clients(dev, cmd, arg);
		f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
		f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
		return 0;
	}

	case VIDIOC_S_FMT:
	{
		struct v4l2_format *f = arg;

		if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		    return -EINVAL;

		saa7134_i2c_call_clients(dev, cmd, arg);
		f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
		f->fmt.pix.sizeimage    = TS_PACKET_SIZE* dev->ts.nr_packets;
		return 0;
	}

	case VIDIOC_REQBUFS:
		return videobuf_reqbufs(&dev->empress_tsq,arg);

	case VIDIOC_QUERYBUF:
		return videobuf_querybuf(&dev->empress_tsq,arg);

	case VIDIOC_QBUF:
		return videobuf_qbuf(&dev->empress_tsq,arg);

	case VIDIOC_DQBUF:
		return videobuf_dqbuf(&dev->empress_tsq,arg,
				      file->f_flags & O_NONBLOCK);

	case VIDIOC_STREAMON:
		return videobuf_streamon(&dev->empress_tsq);

	case VIDIOC_STREAMOFF:
		return videobuf_streamoff(&dev->empress_tsq);

	case VIDIOC_QUERYCTRL:
	case VIDIOC_G_CTRL:
	case VIDIOC_S_CTRL:
		return saa7134_common_ioctl(dev, cmd, arg);

	case VIDIOC_S_MPEGCOMP:
		saa7134_i2c_call_clients(dev, VIDIOC_S_MPEGCOMP, arg);
		ts_init_encoder(dev);
		return 0;
	case VIDIOC_G_MPEGCOMP:
		saa7134_i2c_call_clients(dev, VIDIOC_G_MPEGCOMP, arg);
		return 0;

	default:
		return -ENOIOCTLCMD;
	}
	return 0;
}

static int ts_ioctl(struct inode *inode, struct file *file,
		     unsigned int cmd, unsigned long arg)
{
	return video_usercopy(inode, file, cmd, arg, ts_do_ioctl);
}

static struct file_operations ts_fops =
{
	.owner	  = THIS_MODULE,
	.open	  = ts_open,
	.release  = ts_release,
	.read	  = ts_read,
	.poll	  = ts_poll,
	.mmap	  = ts_mmap,
	.ioctl	  = ts_ioctl,
	.llseek   = no_llseek,
};

/* ----------------------------------------------------------- */

static struct video_device saa7134_empress_template =
{
	.name          = "saa7134-empress",
	.type          = 0 /* FIXME */,
	.type2         = 0 /* FIXME */,
	.hardware      = 0,
	.fops          = &ts_fops,
	.minor	       = -1,
};

static void empress_signal_update(void* data)
{
	struct saa7134_dev* dev = (struct saa7134_dev*) data;

	if (dev->nosignal) {
		dprintk("no video signal\n");
		ts_reset_encoder(dev);
	} else {
		dprintk("video signal acquired\n");
		if (dev->empress_users)
			ts_init_encoder(dev);
	}
}

static void empress_signal_change(struct saa7134_dev *dev)
{
	schedule_work(&dev->empress_workqueue);
}


static int empress_init(struct saa7134_dev *dev)
{
	int err;

	dprintk("%s: %s\n",dev->name,__FUNCTION__);
	dev->empress_dev = video_device_alloc();
	if (NULL == dev->empress_dev)
		return -ENOMEM;
	*(dev->empress_dev) = saa7134_empress_template;
	dev->empress_dev->dev     = &dev->pci->dev;
	dev->empress_dev->release = video_device_release;
	snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
		 "%s empress (%s)", dev->name,
		 saa7134_boards[dev->board].name);

	INIT_WORK(&dev->empress_workqueue, empress_signal_update, (void*) dev);

	err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
				    empress_nr[dev->nr]);
	if (err < 0) {
		printk(KERN_INFO "%s: can't register video device\n",
		       dev->name);
		video_device_release(dev->empress_dev);
		dev->empress_dev = NULL;
		return err;
	}
	printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
	       dev->name,dev->empress_dev->minor & 0x1f);

	videobuf_queue_init(&dev->empress_tsq, &saa7134_ts_qops,
			    dev->pci, &dev->slock,
			    V4L2_BUF_TYPE_VIDEO_CAPTURE,
			    V4L2_FIELD_ALTERNATE,
			    sizeof(struct saa7134_buf),
			    dev);

	empress_signal_update(dev);
	return 0;
}

static int empress_fini(struct saa7134_dev *dev)
{
	dprintk("%s: %s\n",dev->name,__FUNCTION__);

	if (NULL == dev->empress_dev)
		return 0;
	flush_scheduled_work();
	video_unregister_device(dev->empress_dev);
	dev->empress_dev = NULL;
	return 0;
}

static struct saa7134_mpeg_ops empress_ops = {
	.type          = SAA7134_MPEG_EMPRESS,
	.init          = empress_init,
	.fini          = empress_fini,
	.signal_change = empress_signal_change,
};

static int __init empress_register(void)
{
	return saa7134_ts_register(&empress_ops);
}

static void __exit empress_unregister(void)
{
	saa7134_ts_unregister(&empress_ops);
}

module_init(empress_register);
module_exit(empress_unregister);

/* ----------------------------------------------------------- */
/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	*
	3	* (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	18	*/
	19
	20	#include <linux/init.h>
	21	#include <linux/list.h>
	22	#include <linux/module.h>
	23	#include <linux/moduleparam.h>
	24	#include <linux/kernel.h>
	25	#include <linux/slab.h>
	26	#include <linux/delay.h>
	27
	28	#include "saa7134-reg.h"
	29	#include "saa7134.h"
	30
	31	#include <media/saa6752hs.h>
5e453dc7	32	#include <media/v4l2-common.h>
1da177e4 LT	33
	34	/* ------------------------------------------------------------------ */
	35
	36	MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
	37	MODULE_LICENSE("GPL");
	38
	39	static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
674434c6	40
1da177e4 LT	41	module_param_array(empress_nr, int, NULL, 0444);
	42	MODULE_PARM_DESC(empress_nr,"ts device number");
	43
	44	static unsigned int debug = 0;
	45	module_param(debug, int, 0644);
	46	MODULE_PARM_DESC(debug,"enable debug messages");
	47
	48	#define dprintk(fmt, arg...) if (debug) \
	49	printk(KERN_DEBUG "%s/empress: " fmt, dev->name , ## arg)
	50
	51	/* ------------------------------------------------------------------ */
	52
	53	static void ts_reset_encoder(struct saa7134_dev* dev)
	54	{
	55	if (!dev->empress_started)
	56	return;
	57
	58	saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
	59	msleep(10);
4ac97914	60	saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
1da177e4 LT	61	msleep(100);
	62	dev->empress_started = 0;
	63	}
	64
	65	static int ts_init_encoder(struct saa7134_dev* dev)
	66	{
	67	ts_reset_encoder(dev);
	68	saa7134_i2c_call_clients(dev, VIDIOC_S_MPEGCOMP, NULL);
	69	dev->empress_started = 1;
4ac97914	70	return 0;
1da177e4 LT	71	}
	72
	73	/* ------------------------------------------------------------------ */
	74
	75	static int ts_open(struct inode inode, struct file file)
	76	{
	77	int minor = iminor(inode);
	78	struct saa7134_dev h,dev = NULL;
	79	struct list_head *list;
	80	int err;
	81
	82	list_for_each(list,&saa7134_devlist) {
	83	h = list_entry(list, struct saa7134_dev, devlist);
	84	if (h->empress_dev && h->empress_dev->minor == minor)
	85	dev = h;
	86	}
	87	if (NULL == dev)
	88	return -ENODEV;
	89
	90	dprintk("open minor=%d\n",minor);
	91	err = -EBUSY;
3593cab5	92	if (!mutex_trylock(&dev->empress_tsq.lock))
1da177e4 LT	93	goto done;
	94	if (dev->empress_users)
	95	goto done_up;
	96
	97	dev->empress_users++;
	98	file->private_data = dev;
	99	err = 0;
	100
	101	done_up:
3593cab5	102	mutex_unlock(&dev->empress_tsq.lock);
1da177e4 LT	103	done:
	104	return err;
	105	}
	106
	107	static int ts_release(struct inode inode, struct file file)
	108	{
	109	struct saa7134_dev *dev = file->private_data;
	110
	111	if (dev->empress_tsq.streaming)
	112	videobuf_streamoff(&dev->empress_tsq);
3593cab5	113	mutex_lock(&dev->empress_tsq.lock);
1da177e4 LT	114	if (dev->empress_tsq.reading)
	115	videobuf_read_stop(&dev->empress_tsq);
	116	videobuf_mmap_free(&dev->empress_tsq);
	117	dev->empress_users--;
	118
	119	/* stop the encoder */
	120	ts_reset_encoder(dev);
	121
3593cab5	122	mutex_unlock(&dev->empress_tsq.lock);
1da177e4 LT	123	return 0;
	124	}
	125
	126	static ssize_t
	127	ts_read(struct file file, char __user data, size_t count, loff_t *ppos)
	128	{
	129	struct saa7134_dev *dev = file->private_data;
	130
	131	if (!dev->empress_started)
	132	ts_init_encoder(dev);
	133
	134	return videobuf_read_stream(&dev->empress_tsq,
	135	data, count, ppos, 0,
	136	file->f_flags & O_NONBLOCK);
	137	}
	138
	139	static unsigned int
	140	ts_poll(struct file file, struct poll_table_struct wait)
	141	{
	142	struct saa7134_dev *dev = file->private_data;
	143
	144	return videobuf_poll_stream(file, &dev->empress_tsq, wait);
	145	}
	146
	147
	148	static int
	149	ts_mmap(struct file file, struct vm_area_struct vma)
	150	{
	151	struct saa7134_dev *dev = file->private_data;
	152
	153	return videobuf_mmap_mapper(&dev->empress_tsq, vma);
	154	}
	155
	156	/*
	157	* This function is _not_ called directly, but from
	158	* video_generic_ioctl (and maybe others). userspace
	159	* copying is done already, arg is a kernel pointer.
	160	*/
	161	static int ts_do_ioctl(struct inode inode, struct file file,
	162	unsigned int cmd, void *arg)
	163	{
	164	struct saa7134_dev *dev = file->private_data;
	165
	166	if (debug > 1)
5e453dc7	167	v4l_print_ioctl(dev->name,cmd);
1da177e4 LT	168	switch (cmd) {
	169	case VIDIOC_QUERYCAP:
	170	{
	171	struct v4l2_capability *cap = arg;
	172
	173	memset(cap,0,sizeof(*cap));
4ac97914	174	strcpy(cap->driver, "saa7134");
1da177e4 LT	175	strlcpy(cap->card, saa7134_boards[dev->board].name,
	176	sizeof(cap->card));
	177	sprintf(cap->bus_info,"PCI:%s",pci_name(dev->pci));
	178	cap->version = SAA7134_VERSION_CODE;
	179	cap->capabilities =
	180	V4L2_CAP_VIDEO_CAPTURE \|
	181	V4L2_CAP_READWRITE \|
	182	V4L2_CAP_STREAMING;
	183	return 0;
	184	}
	185
	186	/* --- input switching --------------------------------------- */
	187	case VIDIOC_ENUMINPUT:
	188	{
	189	struct v4l2_input *i = arg;
	190
	191	if (i->index != 0)
	192	return -EINVAL;
	193	i->type = V4L2_INPUT_TYPE_CAMERA;
	194	strcpy(i->name,"CCIR656");
	195	return 0;
	196	}
	197	case VIDIOC_G_INPUT:
	198	{
	199	int *i = arg;
	200	*i = 0;
	201	return 0;
	202	}
	203	case VIDIOC_S_INPUT:
	204	{
	205	int *i = arg;
	206
	207	if (*i != 0)
	208	return -EINVAL;
	209	return 0;
	210	}
	211	/* --- capture ioctls ---------------------------------------- */
	212
	213	case VIDIOC_ENUM_FMT:
	214	{
	215	struct v4l2_fmtdesc *f = arg;
	216	int index;
	217
	218	index = f->index;
	219	if (index != 0)
	220	return -EINVAL;
	221
	222	memset(f,0,sizeof(*f));
	223	f->index = index;
	224	strlcpy(f->description, "MPEG TS", sizeof(f->description));
	225	f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	226	f->pixelformat = V4L2_PIX_FMT_MPEG;
	227	return 0;
	228	}
	229
	230	case VIDIOC_G_FMT:
	231	{
	232	struct v4l2_format *f = arg;
	233
	234	memset(f,0,sizeof(*f));
	235	f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	236
0a4c9c93	237	saa7134_i2c_call_clients(dev, cmd, arg);
1da177e4 LT	238	f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG;
	239	f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets;
	240	return 0;
	241	}
	242
	243	case VIDIOC_S_FMT:
	244	{
	245	struct v4l2_format *f = arg;
	246
	247	if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
	248	return -EINVAL;
	249
0a4c9c93	250	saa7134_i2c_call_clients(dev, cmd, arg);
1da177e4 LT	251	f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG;
	252	f->fmt.pix.sizeimage = TS_PACKET_SIZE* dev->ts.nr_packets;
	253	return 0;
	254	}
	255
	256	case VIDIOC_REQBUFS:
	257	return videobuf_reqbufs(&dev->empress_tsq,arg);
	258
	259	case VIDIOC_QUERYBUF:
	260	return videobuf_querybuf(&dev->empress_tsq,arg);
	261
	262	case VIDIOC_QBUF:
	263	return videobuf_qbuf(&dev->empress_tsq,arg);
	264
	265	case VIDIOC_DQBUF:
	266	return videobuf_dqbuf(&dev->empress_tsq,arg,
	267	file->f_flags & O_NONBLOCK);
	268
	269	case VIDIOC_STREAMON:
	270	return videobuf_streamon(&dev->empress_tsq);
	271
	272	case VIDIOC_STREAMOFF:
	273	return videobuf_streamoff(&dev->empress_tsq);
	274
	275	case VIDIOC_QUERYCTRL:
	276	case VIDIOC_G_CTRL:
	277	case VIDIOC_S_CTRL:
	278	return saa7134_common_ioctl(dev, cmd, arg);
	279
	280	case VIDIOC_S_MPEGCOMP:
	281	saa7134_i2c_call_clients(dev, VIDIOC_S_MPEGCOMP, arg);
	282	ts_init_encoder(dev);
	283	return 0;
	284	case VIDIOC_G_MPEGCOMP:
	285	saa7134_i2c_call_clients(dev, VIDIOC_G_MPEGCOMP, arg);
	286	return 0;
	287
	288	default:
	289	return -ENOIOCTLCMD;
	290	}
	291	return 0;
	292	}
	293
	294	static int ts_ioctl(struct inode inode, struct file file,
	295	unsigned int cmd, unsigned long arg)
	296	{
	297	return video_usercopy(inode, file, cmd, arg, ts_do_ioctl);
	298	}
	299
	300	static struct file_operations ts_fops =
	301	{
	302	.owner = THIS_MODULE,
	303	.open = ts_open,
	304	.release = ts_release,
	305	.read = ts_read,
	306	.poll = ts_poll,
	307	.mmap = ts_mmap,
	308	.ioctl = ts_ioctl,
	309	.llseek = no_llseek,
	310	};
	311
	312	/* ----------------------------------------------------------- */
	313
	314	static struct video_device saa7134_empress_template =
315	{
316	.name = "saa7134-empress",
317	.type = 0 /* FIXME */,
318	.type2 = 0 /* FIXME */,
319	.hardware = 0,
320	.fops = &ts_fops,
321	.minor = -1,
322	};
323
324	static void empress_signal_update(void* data)
325	{
326	struct saa7134_dev* dev = (struct saa7134_dev*) data;
327
328	if (dev->nosignal) {
329	dprintk("no video signal\n");
330	ts_reset_encoder(dev);
331	} else {
332	dprintk("video signal acquired\n");
333	if (dev->empress_users)
334	ts_init_encoder(dev);
335	}
336	}
337
338	static void empress_signal_change(struct saa7134_dev *dev)
339	{
340	schedule_work(&dev->empress_workqueue);
341	}
342
343
344	static int empress_init(struct saa7134_dev *dev)
345	{
346	int err;
347
348	dprintk("%s: %s\n",dev->name,__FUNCTION__);
349	dev->empress_dev = video_device_alloc();
350	if (NULL == dev->empress_dev)
351	return -ENOMEM;
352	*(dev->empress_dev) = saa7134_empress_template;
353	dev->empress_dev->dev = &dev->pci->dev;
354	dev->empress_dev->release = video_device_release;
355	snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
356	"%s empress (%s)", dev->name,
357	saa7134_boards[dev->board].name);
358
359	INIT_WORK(&dev->empress_workqueue, empress_signal_update, (void*) dev);
360
361	err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
362	empress_nr[dev->nr]);
363	if (err < 0) {
364	printk(KERN_INFO "%s: can't register video device\n",
365	dev->name);
366	video_device_release(dev->empress_dev);
367	dev->empress_dev = NULL;
368	return err;
369	}
370	printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
371	dev->name,dev->empress_dev->minor & 0x1f);
372
373	videobuf_queue_init(&dev->empress_tsq, &saa7134_ts_qops,
374	dev->pci, &dev->slock,
375	V4L2_BUF_TYPE_VIDEO_CAPTURE,
376	V4L2_FIELD_ALTERNATE,
377	sizeof(struct saa7134_buf),
378	dev);
379
380	empress_signal_update(dev);
381	return 0;
382	}
383
384	static int empress_fini(struct saa7134_dev *dev)
385	{
386	dprintk("%s: %s\n",dev->name,__FUNCTION__);
387
388	if (NULL == dev->empress_dev)
389	return 0;
390	flush_scheduled_work();
391	video_unregister_device(dev->empress_dev);
392	dev->empress_dev = NULL;
393	return 0;
394	}
395
396	static struct saa7134_mpeg_ops empress_ops = {
397	.type = SAA7134_MPEG_EMPRESS,
398	.init = empress_init,
399	.fini = empress_fini,
400	.signal_change = empress_signal_change,
401	};
402
403	static int __init empress_register(void)
404	{
405	return saa7134_ts_register(&empress_ops);
406	}
407
408	static void __exit empress_unregister(void)
409	{
410	saa7134_ts_unregister(&empress_ops);
411	}
412
413	module_init(empress_register);
414	module_exit(empress_unregister);
415
416	/* ----------------------------------------------------------- */
417	/*
418	* Local variables:
419	* c-basic-offset: 8
420	* End:
421	*/