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WIP FPC-III support
[linux/fpc-iii.git] / drivers / media / common / saa7146 / saa7146_fops.c
blobbaf5772c52a96bc18d69c9981dee665c0ef77f32
1 // SPDX-License-Identifier: GPL-2.0-only
2 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
3
4 #include <media/drv-intf/saa7146_vv.h>
5 #include <linux/module.h>
6
7 /****************************************************************************/
8 /* resource management functions, shamelessly stolen from saa7134 driver */
9
10 int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
11 {
12 struct saa7146_dev *dev = fh->dev;
13 struct saa7146_vv *vv = dev->vv_data;
14
15 if (fh->resources & bit) {
16 DEB_D("already allocated! want: 0x%02x, cur:0x%02x\n",
17 bit, vv->resources);
18 /* have it already allocated */
19 return 1;
20 }
21
22 /* is it free? */
23 if (vv->resources & bit) {
24 DEB_D("locked! vv->resources:0x%02x, we want:0x%02x\n",
25 vv->resources, bit);
26 /* no, someone else uses it */
27 return 0;
28 }
29 /* it's free, grab it */
30 fh->resources |= bit;
31 vv->resources |= bit;
32 DEB_D("res: get 0x%02x, cur:0x%02x\n", bit, vv->resources);
33 return 1;
34 }
35
36 void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)
37 {
38 struct saa7146_dev *dev = fh->dev;
39 struct saa7146_vv *vv = dev->vv_data;
40
41 BUG_ON((fh->resources & bits) != bits);
42
43 fh->resources &= ~bits;
44 vv->resources &= ~bits;
45 DEB_D("res: put 0x%02x, cur:0x%02x\n", bits, vv->resources);
46 }
47
48
49 /********************************************************************************/
50 /* common dma functions */
51
52 void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q,
53 struct saa7146_buf *buf)
54 {
55 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
56 DEB_EE("dev:%p, buf:%p\n", dev, buf);
57
58 videobuf_waiton(q, &buf->vb, 0, 0);
59 videobuf_dma_unmap(q->dev, dma);
60 videobuf_dma_free(dma);
61 buf->vb.state = VIDEOBUF_NEEDS_INIT;
62 }
63
64
65 /********************************************************************************/
66 /* common buffer functions */
67
68 int saa7146_buffer_queue(struct saa7146_dev *dev,
69 struct saa7146_dmaqueue *q,
70 struct saa7146_buf *buf)
71 {
72 assert_spin_locked(&dev->slock);
73 DEB_EE("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf);
74
75 BUG_ON(!q);
76
77 if (NULL == q->curr) {
78 q->curr = buf;
79 DEB_D("immediately activating buffer %p\n", buf);
80 buf->activate(dev,buf,NULL);
81 } else {
82 list_add_tail(&buf->vb.queue,&q->queue);
83 buf->vb.state = VIDEOBUF_QUEUED;
84 DEB_D("adding buffer %p to queue. (active buffer present)\n",
85 buf);
86 }
87 return 0;
88 }
89
90 void saa7146_buffer_finish(struct saa7146_dev *dev,
91 struct saa7146_dmaqueue *q,
92 int state)
93 {
94 assert_spin_locked(&dev->slock);
95 DEB_EE("dev:%p, dmaq:%p, state:%d\n", dev, q, state);
96 DEB_EE("q->curr:%p\n", q->curr);
97
98 /* finish current buffer */
99 if (NULL == q->curr) {
100 DEB_D("aiii. no current buffer\n");
101 return;
102 }
103
104 q->curr->vb.state = state;
105 q->curr->vb.ts = ktime_get_ns();
106 wake_up(&q->curr->vb.done);
107
108 q->curr = NULL;
109 }
110
111 void saa7146_buffer_next(struct saa7146_dev *dev,
112 struct saa7146_dmaqueue *q, int vbi)
113 {
114 struct saa7146_buf *buf,*next = NULL;
115
116 BUG_ON(!q);
117
118 DEB_INT("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi);
119
120 assert_spin_locked(&dev->slock);
121 if (!list_empty(&q->queue)) {
122 /* activate next one from queue */
123 buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
124 list_del(&buf->vb.queue);
125 if (!list_empty(&q->queue))
126 next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
127 q->curr = buf;
128 DEB_INT("next buffer: buf:%p, prev:%p, next:%p\n",
129 buf, q->queue.prev, q->queue.next);
130 buf->activate(dev,buf,next);
131 } else {
132 DEB_INT("no next buffer. stopping.\n");
133 if( 0 != vbi ) {
134 /* turn off video-dma3 */
135 saa7146_write(dev,MC1, MASK_20);
136 } else {
137 /* nothing to do -- just prevent next video-dma1 transfer
138 by lowering the protection address */
139
140 // fixme: fix this for vflip != 0
141
142 saa7146_write(dev, PROT_ADDR1, 0);
143 saa7146_write(dev, MC2, (MASK_02|MASK_18));
144
145 /* write the address of the rps-program */
146 saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
147 /* turn on rps */
148 saa7146_write(dev, MC1, (MASK_12 | MASK_28));
149
150 /*
151 printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
152 printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
153 printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
154 printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
155 printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1));
156 printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
157 */
158 }
159 del_timer(&q->timeout);
160 }
161 }
162
163 void saa7146_buffer_timeout(struct timer_list *t)
164 {
165 struct saa7146_dmaqueue *q = from_timer(q, t, timeout);
166 struct saa7146_dev *dev = q->dev;
167 unsigned long flags;
168
169 DEB_EE("dev:%p, dmaq:%p\n", dev, q);
170
171 spin_lock_irqsave(&dev->slock,flags);
172 if (q->curr) {
173 DEB_D("timeout on %p\n", q->curr);
174 saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR);
175 }
176
177 /* we don't restart the transfer here like other drivers do. when
178 a streaming capture is disabled, the timeout function will be
179 called for the current buffer. if we activate the next buffer now,
180 we mess up our capture logic. if a timeout occurs on another buffer,
181 then something is seriously broken before, so no need to buffer the
182 next capture IMHO... */
183 /*
184 saa7146_buffer_next(dev,q);
185 */
186 spin_unlock_irqrestore(&dev->slock,flags);
187 }
188
189 /********************************************************************************/
190 /* file operations */
191
192 static int fops_open(struct file *file)
193 {
194 struct video_device *vdev = video_devdata(file);
195 struct saa7146_dev *dev = video_drvdata(file);
196 struct saa7146_fh *fh = NULL;
197 int result = 0;
198
199 DEB_EE("file:%p, dev:%s\n", file, video_device_node_name(vdev));
200
201 if (mutex_lock_interruptible(vdev->lock))
202 return -ERESTARTSYS;
203
204 DEB_D("using: %p\n", dev);
205
206 /* check if an extension is registered */
207 if( NULL == dev->ext ) {
208 DEB_S("no extension registered for this device\n");
209 result = -ENODEV;
210 goto out;
211 }
212
213 /* allocate per open data */
214 fh = kzalloc(sizeof(*fh),GFP_KERNEL);
215 if (NULL == fh) {
216 DEB_S("cannot allocate memory for per open data\n");
217 result = -ENOMEM;
218 goto out;
219 }
220
221 v4l2_fh_init(&fh->fh, vdev);
222
223 file->private_data = &fh->fh;
224 fh->dev = dev;
225
226 if (vdev->vfl_type == VFL_TYPE_VBI) {
227 DEB_S("initializing vbi...\n");
228 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
229 result = saa7146_vbi_uops.open(dev,file);
230 if (dev->ext_vv_data->vbi_fops.open)
231 dev->ext_vv_data->vbi_fops.open(file);
232 } else {
233 DEB_S("initializing video...\n");
234 result = saa7146_video_uops.open(dev,file);
235 }
236
237 if (0 != result) {
238 goto out;
239 }
240
241 if( 0 == try_module_get(dev->ext->module)) {
242 result = -EINVAL;
243 goto out;
244 }
245
246 result = 0;
247 v4l2_fh_add(&fh->fh);
248 out:
249 if (fh && result != 0) {
250 kfree(fh);
251 file->private_data = NULL;
252 }
253 mutex_unlock(vdev->lock);
254 return result;
255 }
256
257 static int fops_release(struct file *file)
258 {
259 struct video_device *vdev = video_devdata(file);
260 struct saa7146_fh *fh = file->private_data;
261 struct saa7146_dev *dev = fh->dev;
262
263 DEB_EE("file:%p\n", file);
264
265 mutex_lock(vdev->lock);
266
267 if (vdev->vfl_type == VFL_TYPE_VBI) {
268 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
269 saa7146_vbi_uops.release(dev,file);
270 if (dev->ext_vv_data->vbi_fops.release)
271 dev->ext_vv_data->vbi_fops.release(file);
272 } else {
273 saa7146_video_uops.release(dev,file);
274 }
275
276 v4l2_fh_del(&fh->fh);
277 v4l2_fh_exit(&fh->fh);
278 module_put(dev->ext->module);
279 file->private_data = NULL;
280 kfree(fh);
281
282 mutex_unlock(vdev->lock);
283
284 return 0;
285 }
286
287 static int fops_mmap(struct file *file, struct vm_area_struct * vma)
288 {
289 struct video_device *vdev = video_devdata(file);
290 struct saa7146_fh *fh = file->private_data;
291 struct videobuf_queue *q;
292 int res;
293
294 switch (vdev->vfl_type) {
295 case VFL_TYPE_VIDEO: {
296 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",
297 file, vma);
298 q = &fh->video_q;
299 break;
300 }
301 case VFL_TYPE_VBI: {
302 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",
303 file, vma);
304 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT)
305 return -ENODEV;
306 q = &fh->vbi_q;
307 break;
308 }
309 default:
310 BUG();
311 }
312
313 if (mutex_lock_interruptible(vdev->lock))
314 return -ERESTARTSYS;
315 res = videobuf_mmap_mapper(q, vma);
316 mutex_unlock(vdev->lock);
317 return res;
318 }
319
320 static __poll_t __fops_poll(struct file *file, struct poll_table_struct *wait)
321 {
322 struct video_device *vdev = video_devdata(file);
323 struct saa7146_fh *fh = file->private_data;
324 struct videobuf_buffer *buf = NULL;
325 struct videobuf_queue *q;
326 __poll_t res = v4l2_ctrl_poll(file, wait);
327
328 DEB_EE("file:%p, poll:%p\n", file, wait);
329
330 if (vdev->vfl_type == VFL_TYPE_VBI) {
331 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT)
332 return res | EPOLLOUT | EPOLLWRNORM;
333 if( 0 == fh->vbi_q.streaming )
334 return res | videobuf_poll_stream(file, &fh->vbi_q, wait);
335 q = &fh->vbi_q;
336 } else {
337 DEB_D("using video queue\n");
338 q = &fh->video_q;
339 }
340
341 if (!list_empty(&q->stream))
342 buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
343
344 if (!buf) {
345 DEB_D("buf == NULL!\n");
346 return res | EPOLLERR;
347 }
348
349 poll_wait(file, &buf->done, wait);
350 if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) {
351 DEB_D("poll succeeded!\n");
352 return res | EPOLLIN | EPOLLRDNORM;
353 }
354
355 DEB_D("nothing to poll for, buf->state:%d\n", buf->state);
356 return res;
357 }
358
359 static __poll_t fops_poll(struct file *file, struct poll_table_struct *wait)
360 {
361 struct video_device *vdev = video_devdata(file);
362 __poll_t res;
363
364 mutex_lock(vdev->lock);
365 res = __fops_poll(file, wait);
366 mutex_unlock(vdev->lock);
367 return res;
368 }
369
370 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
371 {
372 struct video_device *vdev = video_devdata(file);
373 struct saa7146_fh *fh = file->private_data;
374 int ret;
375
376 switch (vdev->vfl_type) {
377 case VFL_TYPE_VIDEO:
378 /*
379 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun",
380 file, data, (unsigned long)count);
381 */
382 return saa7146_video_uops.read(file,data,count,ppos);
383 case VFL_TYPE_VBI:
384 /*
385 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n",
386 file, data, (unsigned long)count);
387 */
388 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) {
389 if (mutex_lock_interruptible(vdev->lock))
390 return -ERESTARTSYS;
391 ret = saa7146_vbi_uops.read(file, data, count, ppos);
392 mutex_unlock(vdev->lock);
393 return ret;
394 }
395 return -EINVAL;
396 default:
397 BUG();
398 }
399 }
400
401 static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
402 {
403 struct video_device *vdev = video_devdata(file);
404 struct saa7146_fh *fh = file->private_data;
405 int ret;
406
407 switch (vdev->vfl_type) {
408 case VFL_TYPE_VIDEO:
409 return -EINVAL;
410 case VFL_TYPE_VBI:
411 if (fh->dev->ext_vv_data->vbi_fops.write) {
412 if (mutex_lock_interruptible(vdev->lock))
413 return -ERESTARTSYS;
414 ret = fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
415 mutex_unlock(vdev->lock);
416 return ret;
417 }
418 return -EINVAL;
419 default:
420 BUG();
421 }
422 }
423
424 static const struct v4l2_file_operations video_fops =
425 {
426 .owner = THIS_MODULE,
427 .open = fops_open,
428 .release = fops_release,
429 .read = fops_read,
430 .write = fops_write,
431 .poll = fops_poll,
432 .mmap = fops_mmap,
433 .unlocked_ioctl = video_ioctl2,
434 };
435
436 static void vv_callback(struct saa7146_dev *dev, unsigned long status)
437 {
438 u32 isr = status;
439
440 DEB_INT("dev:%p, isr:0x%08x\n", dev, (u32)status);
441
442 if (0 != (isr & (MASK_27))) {
443 DEB_INT("irq: RPS0 (0x%08x)\n", isr);
444 saa7146_video_uops.irq_done(dev,isr);
445 }
446
447 if (0 != (isr & (MASK_28))) {
448 u32 mc2 = saa7146_read(dev, MC2);
449 if( 0 != (mc2 & MASK_15)) {
450 DEB_INT("irq: RPS1 vbi workaround (0x%08x)\n", isr);
451 wake_up(&dev->vv_data->vbi_wq);
452 saa7146_write(dev,MC2, MASK_31);
453 return;
454 }
455 DEB_INT("irq: RPS1 (0x%08x)\n", isr);
456 saa7146_vbi_uops.irq_done(dev,isr);
457 }
458 }
459
460 static const struct v4l2_ctrl_ops saa7146_ctrl_ops = {
461 .s_ctrl = saa7146_s_ctrl,
462 };
463
464 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
465 {
466 struct v4l2_ctrl_handler *hdl = &dev->ctrl_handler;
467 struct v4l2_pix_format *fmt;
468 struct v4l2_vbi_format *vbi;
469 struct saa7146_vv *vv;
470 int err;
471
472 err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
473 if (err)
474 return err;
475
476 v4l2_ctrl_handler_init(hdl, 6);
477 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
478 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
479 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
480 V4L2_CID_CONTRAST, 0, 127, 1, 64);
481 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
482 V4L2_CID_SATURATION, 0, 127, 1, 64);
483 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
484 V4L2_CID_VFLIP, 0, 1, 1, 0);
485 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
486 V4L2_CID_HFLIP, 0, 1, 1, 0);
487 if (hdl->error) {
488 err = hdl->error;
489 v4l2_ctrl_handler_free(hdl);
490 return err;
491 }
492 dev->v4l2_dev.ctrl_handler = hdl;
493
494 vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
495 if (vv == NULL) {
496 ERR("out of memory. aborting.\n");
497 v4l2_ctrl_handler_free(hdl);
498 return -ENOMEM;
499 }
500 ext_vv->vid_ops = saa7146_video_ioctl_ops;
501 ext_vv->vbi_ops = saa7146_vbi_ioctl_ops;
502 ext_vv->core_ops = &saa7146_video_ioctl_ops;
503
504 DEB_EE("dev:%p\n", dev);
505
506 /* set default values for video parts of the saa7146 */
507 saa7146_write(dev, BCS_CTRL, 0x80400040);
508
509 /* enable video-port pins */
510 saa7146_write(dev, MC1, (MASK_10 | MASK_26));
511
512 /* save per-device extension data (one extension can
513 handle different devices that might need different
514 configuration data) */
515 dev->ext_vv_data = ext_vv;
516
517 vv->d_clipping.cpu_addr =
518 dma_alloc_coherent(&dev->pci->dev, SAA7146_CLIPPING_MEM,
519 &vv->d_clipping.dma_handle, GFP_KERNEL);
520 if( NULL == vv->d_clipping.cpu_addr ) {
521 ERR("out of memory. aborting.\n");
522 kfree(vv);
523 v4l2_ctrl_handler_free(hdl);
524 return -1;
525 }
526
527 saa7146_video_uops.init(dev,vv);
528 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
529 saa7146_vbi_uops.init(dev,vv);
530
531 vv->ov_fb.fmt.width = vv->standard->h_max_out;
532 vv->ov_fb.fmt.height = vv->standard->v_max_out;
533 vv->ov_fb.fmt.pixelformat = V4L2_PIX_FMT_RGB565;
534 vv->ov_fb.fmt.bytesperline = 2 * vv->ov_fb.fmt.width;
535 vv->ov_fb.fmt.sizeimage = vv->ov_fb.fmt.bytesperline * vv->ov_fb.fmt.height;
536 vv->ov_fb.fmt.colorspace = V4L2_COLORSPACE_SRGB;
537
538 fmt = &vv->video_fmt;
539 fmt->width = 384;
540 fmt->height = 288;
541 fmt->pixelformat = V4L2_PIX_FMT_BGR24;
542 fmt->field = V4L2_FIELD_ANY;
543 fmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
544 fmt->bytesperline = 3 * fmt->width;
545 fmt->sizeimage = fmt->bytesperline * fmt->height;
546
547 vbi = &vv->vbi_fmt;
548 vbi->sampling_rate = 27000000;
549 vbi->offset = 248; /* todo */
550 vbi->samples_per_line = 720 * 2;
551 vbi->sample_format = V4L2_PIX_FMT_GREY;
552
553 /* fixme: this only works for PAL */
554 vbi->start[0] = 5;
555 vbi->count[0] = 16;
556 vbi->start[1] = 312;
557 vbi->count[1] = 16;
558
559 timer_setup(&vv->vbi_read_timeout, NULL, 0);
560
561 vv->ov_fb.capability = V4L2_FBUF_CAP_LIST_CLIPPING;
562 vv->ov_fb.flags = V4L2_FBUF_FLAG_PRIMARY;
563 dev->vv_data = vv;
564 dev->vv_callback = &vv_callback;
565
566 return 0;
567 }
568 EXPORT_SYMBOL_GPL(saa7146_vv_init);
569
570 int saa7146_vv_release(struct saa7146_dev* dev)
571 {
572 struct saa7146_vv *vv = dev->vv_data;
573
574 DEB_EE("dev:%p\n", dev);
575
576 v4l2_device_unregister(&dev->v4l2_dev);
577 dma_free_coherent(&dev->pci->dev, SAA7146_CLIPPING_MEM,
578 vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
579 v4l2_ctrl_handler_free(&dev->ctrl_handler);
580 kfree(vv);
581 dev->vv_data = NULL;
582 dev->vv_callback = NULL;
583
584 return 0;
585 }
586 EXPORT_SYMBOL_GPL(saa7146_vv_release);
587
588 int saa7146_register_device(struct video_device *vfd, struct saa7146_dev *dev,
589 char *name, int type)
590 {
591 int err;
592 int i;
593
594 DEB_EE("dev:%p, name:'%s', type:%d\n", dev, name, type);
595
596 vfd->fops = &video_fops;
597 if (type == VFL_TYPE_VIDEO)
598 vfd->ioctl_ops = &dev->ext_vv_data->vid_ops;
599 else
600 vfd->ioctl_ops = &dev->ext_vv_data->vbi_ops;
601 vfd->release = video_device_release_empty;
602 vfd->lock = &dev->v4l2_lock;
603 vfd->v4l2_dev = &dev->v4l2_dev;
604 vfd->tvnorms = 0;
605 for (i = 0; i < dev->ext_vv_data->num_stds; i++)
606 vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
607 strscpy(vfd->name, name, sizeof(vfd->name));
608 vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY |
609 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
610 vfd->device_caps |= dev->ext_vv_data->capabilities;
611 if (type == VFL_TYPE_VIDEO)
612 vfd->device_caps &=
613 ~(V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_OUTPUT);
614 else
615 vfd->device_caps &=
616 ~(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY | V4L2_CAP_AUDIO);
617 video_set_drvdata(vfd, dev);
618
619 err = video_register_device(vfd, type, -1);
620 if (err < 0) {
621 ERR("cannot register v4l2 device. skipping.\n");
622 return err;
623 }
624
625 pr_info("%s: registered device %s [v4l2]\n",
626 dev->name, video_device_node_name(vfd));
627 return 0;
628 }
629 EXPORT_SYMBOL_GPL(saa7146_register_device);
630
631 int saa7146_unregister_device(struct video_device *vfd, struct saa7146_dev *dev)
632 {
633 DEB_EE("dev:%p\n", dev);
634
635 video_unregister_device(vfd);
636 return 0;
637 }
638 EXPORT_SYMBOL_GPL(saa7146_unregister_device);
639
640 static int __init saa7146_vv_init_module(void)
641 {
642 return 0;
643 }
644
645
646 static void __exit saa7146_vv_cleanup_module(void)
647 {
648 }
649
650 module_init(saa7146_vv_init_module);
651 module_exit(saa7146_vv_cleanup_module);
652
653 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
654 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
655 MODULE_LICENSE("GPL");
Linux with added FPC-III support