1 #include <media/saa7146_vv.h>
2
3 #define BOARD_CAN_DO_VBI(dev) (dev->revision != 0 && dev->vv_data->vbi_minor != -1)
4
5 /****************************************************************************/
6 /* resource management functions, shamelessly stolen from saa7134 driver */
7
8 int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
9 {
10 struct saa7146_dev *dev = fh->dev;
11 struct saa7146_vv *vv = dev->vv_data;
12
13 if (fh->resources & bit) {
14 DEB_D(("already allocated! want: 0x%02x, cur:0x%02x\n",bit,vv->resources));
15 /* have it already allocated */
16 return 1;
17 }
18
19 /* is it free? */
20 mutex_lock(&dev->lock);
21 if (vv->resources & bit) {
22 DEB_D(("locked! vv->resources:0x%02x, we want:0x%02x\n",vv->resources,bit));
23 /* no, someone else uses it */
24 mutex_unlock(&dev->lock);
25 return 0;
26 }
27 /* it's free, grab it */
28 fh->resources |= bit;
29 vv->resources |= bit;
30 DEB_D(("res: get 0x%02x, cur:0x%02x\n",bit,vv->resources));
31 mutex_unlock(&dev->lock);
32 return 1;
33 }
34
35 void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)
36 {
37 struct saa7146_dev *dev = fh->dev;
38 struct saa7146_vv *vv = dev->vv_data;
39
40 BUG_ON((fh->resources & bits) != bits);
41
42 mutex_lock(&dev->lock);
43 fh->resources &= ~bits;
44 vv->resources &= ~bits;
45 DEB_D(("res: put 0x%02x, cur:0x%02x\n",bits,vv->resources));
46 mutex_unlock(&dev->lock);
47 }
48
49
50 /********************************************************************************/
51 /* common dma functions */
52
53 void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q,
54 struct saa7146_buf *buf)
55 {
56 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
57 DEB_EE(("dev:%p, buf:%p\n",dev,buf));
58
59 BUG_ON(in_interrupt());
60
61 videobuf_waiton(&buf->vb,0,0);
62 videobuf_dma_unmap(q, dma);
63 videobuf_dma_free(dma);
64 buf->vb.state = VIDEOBUF_NEEDS_INIT;
65 }
66
67
68 /********************************************************************************/
69 /* common buffer functions */
70
71 int saa7146_buffer_queue(struct saa7146_dev *dev,
72 struct saa7146_dmaqueue *q,
73 struct saa7146_buf *buf)
74 {
75 assert_spin_locked(&dev->slock);
76 DEB_EE(("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf));
77
78 BUG_ON(!q);
79
80 if (NULL == q->curr) {
81 q->curr = buf;
82 DEB_D(("immediately activating buffer %p\n", buf));
83 buf->activate(dev,buf,NULL);
84 } else {
85 list_add_tail(&buf->vb.queue,&q->queue);
86 buf->vb.state = VIDEOBUF_QUEUED;
87 DEB_D(("adding buffer %p to queue. (active buffer present)\n", buf));
88 }
89 return 0;
90 }
91
92 void saa7146_buffer_finish(struct saa7146_dev *dev,
93 struct saa7146_dmaqueue *q,
94 int state)
95 {
96 assert_spin_locked(&dev->slock);
97 DEB_EE(("dev:%p, dmaq:%p, state:%d\n", dev, q, state));
98 DEB_EE(("q->curr:%p\n",q->curr));
99
100 BUG_ON(!q->curr);
101
102 /* finish current buffer */
103 if (NULL == q->curr) {
104 DEB_D(("aiii. no current buffer\n"));
105 return;
106 }
107
108 q->curr->vb.state = state;
109 do_gettimeofday(&q->curr->vb.ts);
110 wake_up(&q->curr->vb.done);
111
112 q->curr = NULL;
113 }
114
115 void saa7146_buffer_next(struct saa7146_dev *dev,
116 struct saa7146_dmaqueue *q, int vbi)
117 {
118 struct saa7146_buf *buf,*next = NULL;
119
120 BUG_ON(!q);
121
122 DEB_INT(("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi));
123
124 assert_spin_locked(&dev->slock);
125 if (!list_empty(&q->queue)) {
126 /* activate next one from queue */
127 buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
128 list_del(&buf->vb.queue);
129 if (!list_empty(&q->queue))
130 next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
131 q->curr = buf;
132 DEB_INT(("next buffer: buf:%p, prev:%p, next:%p\n", buf, q->queue.prev,q->queue.next));
133 buf->activate(dev,buf,next);
134 } else {
135 DEB_INT(("no next buffer. stopping.\n"));
136 if( 0 != vbi ) {
137 /* turn off video-dma3 */
138 saa7146_write(dev,MC1, MASK_20);
139 } else {
140 /* nothing to do -- just prevent next video-dma1 transfer
141 by lowering the protection address */
142
143 // fixme: fix this for vflip != 0
144
145 saa7146_write(dev, PROT_ADDR1, 0);
146 saa7146_write(dev, MC2, (MASK_02|MASK_18));
147
148 /* write the address of the rps-program */
149 saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
150 /* turn on rps */
151 saa7146_write(dev, MC1, (MASK_12 | MASK_28));
152
153 /*
154 printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
155 printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
156 printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
157 printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
158 printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1));
159 printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
160 */
161 }
162 del_timer(&q->timeout);
163 }
164 }
165
166 void saa7146_buffer_timeout(unsigned long data)
167 {
168 struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data;
169 struct saa7146_dev *dev = q->dev;
170 unsigned long flags;
171
172 DEB_EE(("dev:%p, dmaq:%p\n", dev, q));
173
174 spin_lock_irqsave(&dev->slock,flags);
175 if (q->curr) {
176 DEB_D(("timeout on %p\n", q->curr));
177 saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR);
178 }
179
180 /* we don't restart the transfer here like other drivers do. when
181 a streaming capture is disabled, the timeout function will be
182 called for the current buffer. if we activate the next buffer now,
183 we mess up our capture logic. if a timeout occurs on another buffer,
184 then something is seriously broken before, so no need to buffer the
185 next capture IMHO... */
186 /*
187 saa7146_buffer_next(dev,q);
188 */
189 spin_unlock_irqrestore(&dev->slock,flags);
190 }
191
192 /********************************************************************************/
193 /* file operations */
194
195 static int fops_open(struct inode *inode, struct file *file)
196 {
197 unsigned int minor = iminor(inode);
198 struct saa7146_dev *h = NULL, *dev = NULL;
199 struct list_head *list;
200 struct saa7146_fh *fh = NULL;
201 int result = 0;
202
203 enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
204
205 DEB_EE(("inode:%p, file:%p, minor:%d\n",inode,file,minor));
206
207 if (mutex_lock_interruptible(&saa7146_devices_lock))
208 return -ERESTARTSYS;
209
210 list_for_each(list,&saa7146_devices) {
211 h = list_entry(list, struct saa7146_dev, item);
212 if( NULL == h->vv_data ) {
213 DEB_D(("device %p has not registered video devices.\n",h));
214 continue;
215 }
216 DEB_D(("trying: %p @ major %d,%d\n",h,h->vv_data->video_minor,h->vv_data->vbi_minor));
217
218 if (h->vv_data->video_minor == minor) {
219 dev = h;
220 }
221 if (h->vv_data->vbi_minor == minor) {
222 type = V4L2_BUF_TYPE_VBI_CAPTURE;
223 dev = h;
224 }
225 }
226 if (NULL == dev) {
227 DEB_S(("no such video device.\n"));
228 result = -ENODEV;
229 goto out;
230 }
231
232 DEB_D(("using: %p\n",dev));
233
234 /* check if an extension is registered */
235 if( NULL == dev->ext ) {
236 DEB_S(("no extension registered for this device.\n"));
237 result = -ENODEV;
238 goto out;
239 }
240
241 /* allocate per open data */
242 fh = kzalloc(sizeof(*fh),GFP_KERNEL);
243 if (NULL == fh) {
244 DEB_S(("cannot allocate memory for per open data.\n"));
245 result = -ENOMEM;
246 goto out;
247 }
248
249 file->private_data = fh;
250 fh->dev = dev;
251 fh->type = type;
252
253 if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
254 DEB_S(("initializing vbi...\n"));
255 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
256 result = saa7146_vbi_uops.open(dev,file);
257 if (dev->ext_vv_data->vbi_fops.open)
258 dev->ext_vv_data->vbi_fops.open(inode, file);
259 } else {
260 DEB_S(("initializing video...\n"));
261 result = saa7146_video_uops.open(dev,file);
262 }
263
264 if (0 != result) {
265 goto out;
266 }
267
268 if( 0 == try_module_get(dev->ext->module)) {
269 result = -EINVAL;
270 goto out;
271 }
272
273 result = 0;
274 out:
275 if (fh && result != 0) {
276 kfree(fh);
277 file->private_data = NULL;
278 }
279 mutex_unlock(&saa7146_devices_lock);
280 return result;
281 }
282
283 static int fops_release(struct inode *inode, struct file *file)
284 {
285 struct saa7146_fh *fh = file->private_data;
286 struct saa7146_dev *dev = fh->dev;
287
288 DEB_EE(("inode:%p, file:%p\n",inode,file));
289
290 if (mutex_lock_interruptible(&saa7146_devices_lock))
291 return -ERESTARTSYS;
292
293 if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
294 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
295 saa7146_vbi_uops.release(dev,file);
296 if (dev->ext_vv_data->vbi_fops.release)
297 dev->ext_vv_data->vbi_fops.release(inode, file);
298 } else {
299 saa7146_video_uops.release(dev,file);
300 }
301
302 module_put(dev->ext->module);
303 file->private_data = NULL;
304 kfree(fh);
305
306 mutex_unlock(&saa7146_devices_lock);
307
308 return 0;
309 }
310
311 static int fops_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
312 {
313 /*
314 DEB_EE(("inode:%p, file:%p, cmd:%d, arg:%li\n",inode, file, cmd, arg));
315 */
316 return video_usercopy(inode, file, cmd, arg, saa7146_video_do_ioctl);
317 }
318
319 static int fops_mmap(struct file *file, struct vm_area_struct * vma)
320 {
321 struct saa7146_fh *fh = file->private_data;
322 struct videobuf_queue *q;
323
324 switch (fh->type) {
325 case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
326 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma));
327 q = &fh->video_q;
328 break;
329 }
330 case V4L2_BUF_TYPE_VBI_CAPTURE: {
331 DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma));
332 q = &fh->vbi_q;
333 break;
334 }
335 default:
336 BUG();
337 return 0;
338 }
339
340 return videobuf_mmap_mapper(q,vma);
341 }
342
343 static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
344 {
345 struct saa7146_fh *fh = file->private_data;
346 struct videobuf_buffer *buf = NULL;
347 struct videobuf_queue *q;
348
349 DEB_EE(("file:%p, poll:%p\n",file, wait));
350
351 if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
352 if( 0 == fh->vbi_q.streaming )
353 return videobuf_poll_stream(file, &fh->vbi_q, wait);
354 q = &fh->vbi_q;
355 } else {
356 DEB_D(("using video queue.\n"));
357 q = &fh->video_q;
358 }
359
360 if (!list_empty(&q->stream))
361 buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
362
363 if (!buf) {
364 DEB_D(("buf == NULL!\n"));
365 return POLLERR;
366 }
367
368 poll_wait(file, &buf->done, wait);
369 if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) {
370 DEB_D(("poll succeeded!\n"));
371 return POLLIN|POLLRDNORM;
372 }
373
374 DEB_D(("nothing to poll for, buf->state:%d\n",buf->state));
375 return 0;
376 }
377
378 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
379 {
380 struct saa7146_fh *fh = file->private_data;
381
382 switch (fh->type) {
383 case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
384 // DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count));
385 return saa7146_video_uops.read(file,data,count,ppos);
386 }
387 case V4L2_BUF_TYPE_VBI_CAPTURE: {
388 // DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count));
389 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
390 return saa7146_vbi_uops.read(file,data,count,ppos);
391 else
392 return -EINVAL;
393 }
394 break;
395 default:
396 BUG();
397 return 0;
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 saa7146_fh *fh = file->private_data;
404
405 switch (fh->type) {
406 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
407 return -EINVAL;
408 case V4L2_BUF_TYPE_VBI_CAPTURE:
409 if (fh->dev->ext_vv_data->vbi_fops.write)
410 return fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
411 else
412 return -EINVAL;
413 default:
414 BUG();
415 return -EINVAL;
416 }
417 }
418
419 static const struct file_operations video_fops =
420 {
421 .owner = THIS_MODULE,
422 .open = fops_open,
423 .release = fops_release,
424 .read = fops_read,
425 .write = fops_write,
426 .poll = fops_poll,
427 .mmap = fops_mmap,
428 .ioctl = fops_ioctl,
429 .llseek = no_llseek,
430 };
431
432 static void vv_callback(struct saa7146_dev *dev, unsigned long status)
433 {
434 u32 isr = status;
435
436 DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status));
437
438 if (0 != (isr & (MASK_27))) {
439 DEB_INT(("irq: RPS0 (0x%08x).\n",isr));
440 saa7146_video_uops.irq_done(dev,isr);
441 }
442
443 if (0 != (isr & (MASK_28))) {
444 u32 mc2 = saa7146_read(dev, MC2);
445 if( 0 != (mc2 & MASK_15)) {
446 DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr));
447 wake_up(&dev->vv_data->vbi_wq);
448 saa7146_write(dev,MC2, MASK_31);
449 return;
450 }
451 DEB_INT(("irq: RPS1 (0x%08x).\n",isr));
452 saa7146_vbi_uops.irq_done(dev,isr);
453 }
454 }
455
456 static struct video_device device_template =
457 {
458 .fops = &video_fops,
459 .minor = -1,
460 };
461
462 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
463 {
464 struct saa7146_vv *vv = kzalloc (sizeof(struct saa7146_vv),GFP_KERNEL);
465 if( NULL == vv ) {
466 ERR(("out of memory. aborting.\n"));
467 return -1;
468 }
469
470 DEB_EE(("dev:%p\n",dev));
471
472 /* set default values for video parts of the saa7146 */
473 saa7146_write(dev, BCS_CTRL, 0x80400040);
474
475 /* enable video-port pins */
476 saa7146_write(dev, MC1, (MASK_10 | MASK_26));
477
478 /* save per-device extension data (one extension can
479 handle different devices that might need different
480 configuration data) */
481 dev->ext_vv_data = ext_vv;
482
483 vv->video_minor = -1;
484 vv->vbi_minor = -1;
485
486 vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);
487 if( NULL == vv->d_clipping.cpu_addr ) {
488 ERR(("out of memory. aborting.\n"));
489 kfree(vv);
490 return -1;
491 }
492 memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);
493
494 saa7146_video_uops.init(dev,vv);
495 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
496 saa7146_vbi_uops.init(dev,vv);
497
498 dev->vv_data = vv;
499 dev->vv_callback = &vv_callback;
500
501 return 0;
502 }
503 EXPORT_SYMBOL_GPL(saa7146_vv_init);
504
505 int saa7146_vv_release(struct saa7146_dev* dev)
506 {
507 struct saa7146_vv *vv = dev->vv_data;
508
509 DEB_EE(("dev:%p\n",dev));
510
511 pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
512 kfree(vv);
513 dev->vv_data = NULL;
514 dev->vv_callback = NULL;
515
516 return 0;
517 }
518 EXPORT_SYMBOL_GPL(saa7146_vv_release);
519
520 int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
521 char *name, int type)
522 {
523 struct saa7146_vv *vv = dev->vv_data;
524 struct video_device *vfd;
525
526 DEB_EE(("dev:%p, name:'%s', type:%d\n",dev,name,type));
527
528 // released by vfd->release
529 vfd = video_device_alloc();
530 if (vfd == NULL)
531 return -ENOMEM;
532
533 memcpy(vfd, &device_template, sizeof(struct video_device));
534 strlcpy(vfd->name, name, sizeof(vfd->name));
535 vfd->release = video_device_release;
536 vfd->priv = dev;
537
538 // fixme: -1 should be an insmod parameter *for the extension* (like "video_nr");
539 if (video_register_device(vfd, type, -1) < 0) {
540 ERR(("cannot register v4l2 device. skipping.\n"));
541 video_device_release(vfd);
542 return -1;
543 }
544
545 if( VFL_TYPE_GRABBER == type ) {
546 vv->video_minor = vfd->minor;
547 INFO(("%s: registered device video%d [v4l2]\n",
548 dev->name, vfd->minor & 0x1f));
549 } else {
550 vv->vbi_minor = vfd->minor;
551 INFO(("%s: registered device vbi%d [v4l2]\n",
552 dev->name, vfd->minor & 0x1f));
553 }
554
555 *vid = vfd;
556 return 0;
557 }
558 EXPORT_SYMBOL_GPL(saa7146_register_device);
559
560 int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
561 {
562 struct saa7146_vv *vv = dev->vv_data;
563
564 DEB_EE(("dev:%p\n",dev));
565
566 if( VFL_TYPE_GRABBER == (*vid)->type ) {
567 vv->video_minor = -1;
568 } else {
569 vv->vbi_minor = -1;
570 }
571
572 video_unregister_device(*vid);
573 *vid = NULL;
574
575 return 0;
576 }
577 EXPORT_SYMBOL_GPL(saa7146_unregister_device);
578
579 static int __init saa7146_vv_init_module(void)
580 {
581 return 0;
582 }
583
584
585 static void __exit saa7146_vv_cleanup_module(void)
586 {
587 }
588
589 module_init(saa7146_vv_init_module);
590 module_exit(saa7146_vv_cleanup_module);
591
592 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
593 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
594 MODULE_LICENSE("GPL");
595
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