[deliverable/linux.git] / drivers / media / video / saa7134 / saa7134-empress.c

/*
 * $Id: saa7134-empress.c,v 1.10 2005/02/03 10:24:33 kraxel Exp $
 *
 * (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>

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

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 (down_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:
	up(&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);
	down(&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);

	up(&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)
		saa7134_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;

		/* FIXME: translate subsampling type EMPRESS into
		 *        width/height: */
		f->fmt.pix.width        = 720; /* D1 */
		f->fmt.pix.height       = 576;
		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;

		/*
		  FIXME: translate and round width/height into EMPRESS
		  subsample type:

		          type  |   PAL   |  NTSC
			---------------------------
			  SIF   | 352x288 | 352x240
			 1/2 D1 | 352x576 | 352x480
			 2/3 D1 | 480x576 | 480x480
			  D1    | 720x576 | 720x480
		*/

		f->fmt.pix.width        = 720; /* D1 */
		f->fmt.pix.height       = 576;
		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 LT	1	/*
	2	* $Id: saa7134-empress.c,v 1.10 2005/02/03 10:24:33 kraxel Exp $
	3	*
	4	* (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
	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., 675 Mass Ave, Cambridge, MA 02139, USA.
	19	*/
	20
	21	#include <linux/init.h>
	22	#include <linux/list.h>
	23	#include <linux/module.h>
	24	#include <linux/moduleparam.h>
	25	#include <linux/kernel.h>
	26	#include <linux/slab.h>
	27	#include <linux/delay.h>
	28
	29	#include "saa7134-reg.h"
	30	#include "saa7134.h"
	31
	32	#include <media/saa6752hs.h>
	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 };
	40	module_param_array(empress_nr, int, NULL, 0444);
	41	MODULE_PARM_DESC(empress_nr,"ts device number");
	42
	43	static unsigned int debug = 0;
	44	module_param(debug, int, 0644);
	45	MODULE_PARM_DESC(debug,"enable debug messages");
	46
	47	#define dprintk(fmt, arg...) if (debug) \
	48	printk(KERN_DEBUG "%s/empress: " fmt, dev->name , ## arg)
	49
	50	/* ------------------------------------------------------------------ */
	51
	52	static void ts_reset_encoder(struct saa7134_dev* dev)
	53	{
	54	if (!dev->empress_started)
	55	return;
	56
	57	saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
	58	msleep(10);
	59	saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
	60	msleep(100);
	61	dev->empress_started = 0;
	62	}
	63
	64	static int ts_init_encoder(struct saa7134_dev* dev)
65	{
66	ts_reset_encoder(dev);
67	saa7134_i2c_call_clients(dev, VIDIOC_S_MPEGCOMP, NULL);
68	dev->empress_started = 1;
69	return 0;
70	}
71
72	/* ------------------------------------------------------------------ */
73
74	static int ts_open(struct inode inode, struct file file)
75	{
76	int minor = iminor(inode);
77	struct saa7134_dev h,dev = NULL;
78	struct list_head *list;
79	int err;
80
81	list_for_each(list,&saa7134_devlist) {
82	h = list_entry(list, struct saa7134_dev, devlist);
83	if (h->empress_dev && h->empress_dev->minor == minor)
84	dev = h;
85	}
86	if (NULL == dev)
87	return -ENODEV;
88
89	dprintk("open minor=%d\n",minor);
90	err = -EBUSY;
91	if (down_trylock(&dev->empress_tsq.lock))
92	goto done;
93	if (dev->empress_users)
94	goto done_up;
95
96	dev->empress_users++;
97	file->private_data = dev;
98	err = 0;
99
100	done_up:
101	up(&dev->empress_tsq.lock);
102	done:
103	return err;
104	}
105
106	static int ts_release(struct inode inode, struct file file)
107	{
108	struct saa7134_dev *dev = file->private_data;
109
110	if (dev->empress_tsq.streaming)
111	videobuf_streamoff(&dev->empress_tsq);
112	down(&dev->empress_tsq.lock);
113	if (dev->empress_tsq.reading)
114	videobuf_read_stop(&dev->empress_tsq);
115	videobuf_mmap_free(&dev->empress_tsq);
116	dev->empress_users--;
117
118	/* stop the encoder */
119	ts_reset_encoder(dev);
120
121	up(&dev->empress_tsq.lock);
122	return 0;
123	}
124
125	static ssize_t
126	ts_read(struct file file, char __user data, size_t count, loff_t *ppos)
127	{
128	struct saa7134_dev *dev = file->private_data;
129
130	if (!dev->empress_started)
131	ts_init_encoder(dev);
132
133	return videobuf_read_stream(&dev->empress_tsq,
134	data, count, ppos, 0,
135	file->f_flags & O_NONBLOCK);
136	}
137
138	static unsigned int
139	ts_poll(struct file file, struct poll_table_struct wait)
140	{
141	struct saa7134_dev *dev = file->private_data;
142
143	return videobuf_poll_stream(file, &dev->empress_tsq, wait);
144	}
145
146
147	static int
148	ts_mmap(struct file file, struct vm_area_struct vma)
149	{
150	struct saa7134_dev *dev = file->private_data;
151
152	return videobuf_mmap_mapper(&dev->empress_tsq, vma);
153	}
154
155	/*
156	* This function is _not_ called directly, but from
157	* video_generic_ioctl (and maybe others). userspace
158	* copying is done already, arg is a kernel pointer.
159	*/
160	static int ts_do_ioctl(struct inode inode, struct file file,
161	unsigned int cmd, void *arg)
162	{
163	struct saa7134_dev *dev = file->private_data;
164
165	if (debug > 1)
166	saa7134_print_ioctl(dev->name,cmd);
167	switch (cmd) {
168	case VIDIOC_QUERYCAP:
169	{
170	struct v4l2_capability *cap = arg;
171
172	memset(cap,0,sizeof(*cap));
173	strcpy(cap->driver, "saa7134");
174	strlcpy(cap->card, saa7134_boards[dev->board].name,
175	sizeof(cap->card));
176	sprintf(cap->bus_info,"PCI:%s",pci_name(dev->pci));
177	cap->version = SAA7134_VERSION_CODE;
178	cap->capabilities =
179	V4L2_CAP_VIDEO_CAPTURE \|
180	V4L2_CAP_READWRITE \|
181	V4L2_CAP_STREAMING;
182	return 0;
183	}
184
185	/* --- input switching --------------------------------------- */
186	case VIDIOC_ENUMINPUT:
187	{
188	struct v4l2_input *i = arg;
189
190	if (i->index != 0)
191	return -EINVAL;
192	i->type = V4L2_INPUT_TYPE_CAMERA;
193	strcpy(i->name,"CCIR656");
194	return 0;
195	}
196	case VIDIOC_G_INPUT:
197	{
198	int *i = arg;
199	*i = 0;
200	return 0;
201	}
202	case VIDIOC_S_INPUT:
203	{
204	int *i = arg;
205
206	if (*i != 0)
207	return -EINVAL;
208	return 0;
209	}
210	/* --- capture ioctls ---------------------------------------- */
211
212	case VIDIOC_ENUM_FMT:
213	{
214	struct v4l2_fmtdesc *f = arg;
215	int index;
216
217	index = f->index;
218	if (index != 0)
219	return -EINVAL;
220
221	memset(f,0,sizeof(*f));
222	f->index = index;
223	strlcpy(f->description, "MPEG TS", sizeof(f->description));
224	f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
225	f->pixelformat = V4L2_PIX_FMT_MPEG;
226	return 0;
227	}
228
229	case VIDIOC_G_FMT:
230	{
231	struct v4l2_format *f = arg;
232
233	memset(f,0,sizeof(*f));
234	f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
235
236	/* FIXME: translate subsampling type EMPRESS into
237	* width/height: */
238	f->fmt.pix.width = 720; /* D1 */
239	f->fmt.pix.height = 576;
240	f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG;
241	f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets;
242	return 0;
243	}
244
245	case VIDIOC_S_FMT:
246	{
247	struct v4l2_format *f = arg;
248
249	if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
250	return -EINVAL;
251
252	/*
253	FIXME: translate and round width/height into EMPRESS
254	subsample type:
255
256	type \| PAL \| NTSC
257	---------------------------
258	SIF \| 352x288 \| 352x240
259	1/2 D1 \| 352x576 \| 352x480
260	2/3 D1 \| 480x576 \| 480x480
261	D1 \| 720x576 \| 720x480
262	*/
263
264	f->fmt.pix.width = 720; /* D1 */
265	f->fmt.pix.height = 576;
266	f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG;
267	f->fmt.pix.sizeimage = TS_PACKET_SIZE* dev->ts.nr_packets;
268	return 0;
269	}
270
271	case VIDIOC_REQBUFS:
272	return videobuf_reqbufs(&dev->empress_tsq,arg);
273
274	case VIDIOC_QUERYBUF:
275	return videobuf_querybuf(&dev->empress_tsq,arg);
276
277	case VIDIOC_QBUF:
278	return videobuf_qbuf(&dev->empress_tsq,arg);
279
280	case VIDIOC_DQBUF:
281	return videobuf_dqbuf(&dev->empress_tsq,arg,
282	file->f_flags & O_NONBLOCK);
283
284	case VIDIOC_STREAMON:
285	return videobuf_streamon(&dev->empress_tsq);
286
287	case VIDIOC_STREAMOFF:
288	return videobuf_streamoff(&dev->empress_tsq);
289
290	case VIDIOC_QUERYCTRL:
291	case VIDIOC_G_CTRL:
292	case VIDIOC_S_CTRL:
293	return saa7134_common_ioctl(dev, cmd, arg);
294
295	case VIDIOC_S_MPEGCOMP:
296	saa7134_i2c_call_clients(dev, VIDIOC_S_MPEGCOMP, arg);
297	ts_init_encoder(dev);
298	return 0;
299	case VIDIOC_G_MPEGCOMP:
300	saa7134_i2c_call_clients(dev, VIDIOC_G_MPEGCOMP, arg);
301	return 0;
302
303	default:
304	return -ENOIOCTLCMD;
305	}
306	return 0;
307	}
308
309	static int ts_ioctl(struct inode inode, struct file file,
310	unsigned int cmd, unsigned long arg)
311	{
312	return video_usercopy(inode, file, cmd, arg, ts_do_ioctl);
313	}
314
315	static struct file_operations ts_fops =
316	{
317	.owner = THIS_MODULE,
318	.open = ts_open,
319	.release = ts_release,
320	.read = ts_read,
321	.poll = ts_poll,
322	.mmap = ts_mmap,
323	.ioctl = ts_ioctl,
324	.llseek = no_llseek,
325	};
326
327	/* ----------------------------------------------------------- */
328
329	static struct video_device saa7134_empress_template =
330	{
331	.name = "saa7134-empress",
332	.type = 0 /* FIXME */,
333	.type2 = 0 /* FIXME */,
334	.hardware = 0,
335	.fops = &ts_fops,
336	.minor = -1,
337	};
338
339	static void empress_signal_update(void* data)
340	{
341	struct saa7134_dev* dev = (struct saa7134_dev*) data;
342
343	if (dev->nosignal) {
344	dprintk("no video signal\n");
345	ts_reset_encoder(dev);
346	} else {
347	dprintk("video signal acquired\n");
348	if (dev->empress_users)
349	ts_init_encoder(dev);
350	}
351	}
352
353	static void empress_signal_change(struct saa7134_dev *dev)
354	{
355	schedule_work(&dev->empress_workqueue);
356	}
357
358
359	static int empress_init(struct saa7134_dev *dev)
360	{
361	int err;
362
363	dprintk("%s: %s\n",dev->name,__FUNCTION__);
364	dev->empress_dev = video_device_alloc();
365	if (NULL == dev->empress_dev)
366	return -ENOMEM;
367	*(dev->empress_dev) = saa7134_empress_template;
368	dev->empress_dev->dev = &dev->pci->dev;
369	dev->empress_dev->release = video_device_release;
370	snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
371	"%s empress (%s)", dev->name,
372	saa7134_boards[dev->board].name);
373
374	INIT_WORK(&dev->empress_workqueue, empress_signal_update, (void*) dev);
375
376	err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
377	empress_nr[dev->nr]);
378	if (err < 0) {
379	printk(KERN_INFO "%s: can't register video device\n",
380	dev->name);
381	video_device_release(dev->empress_dev);
382	dev->empress_dev = NULL;
383	return err;
384	}
385	printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
386	dev->name,dev->empress_dev->minor & 0x1f);
387
388	videobuf_queue_init(&dev->empress_tsq, &saa7134_ts_qops,
389	dev->pci, &dev->slock,
390	V4L2_BUF_TYPE_VIDEO_CAPTURE,
391	V4L2_FIELD_ALTERNATE,
392	sizeof(struct saa7134_buf),
393	dev);
394
395	empress_signal_update(dev);
396	return 0;
397	}
398
399	static int empress_fini(struct saa7134_dev *dev)
400	{
401	dprintk("%s: %s\n",dev->name,__FUNCTION__);
402
403	if (NULL == dev->empress_dev)
404	return 0;
405	flush_scheduled_work();
406	video_unregister_device(dev->empress_dev);
407	dev->empress_dev = NULL;
408	return 0;
409	}
410
411	static struct saa7134_mpeg_ops empress_ops = {
412	.type = SAA7134_MPEG_EMPRESS,
413	.init = empress_init,
414	.fini = empress_fini,
415	.signal_change = empress_signal_change,
416	};
417
418	static int __init empress_register(void)
419	{
420	return saa7134_ts_register(&empress_ops);
421	}
422
423	static void __exit empress_unregister(void)
424	{
425	saa7134_ts_unregister(&empress_ops);
426	}
427
428	module_init(empress_register);
429	module_exit(empress_unregister);
430
431	/* ----------------------------------------------------------- */
432	/*
433	* Local variables:
434	* c-basic-offset: 8
435	* End:
436	*/