1 #include <media/saa7146_vv.h>
2
3 /****************************************************************************/
4 /* resource management functions, shamelessly stolen from saa7134 driver */
5
saa7146_res_get(struct saa7146_fh * fh,unsigned int bit)6 int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
7 {
8 struct saa7146_dev *dev = fh->dev;
9 struct saa7146_vv *vv = dev->vv_data;
10
11 if (fh->resources & bit) {
12 DEB_D(("already allocated! want: 0x%02x, cur:0x%02x\n",bit,vv->resources));
13 /* have it already allocated */
14 return 1;
15 }
16
17 /* is it free? */
18 if (vv->resources & bit) {
19 DEB_D(("locked! vv->resources:0x%02x, we want:0x%02x\n",vv->resources,bit));
20 /* no, someone else uses it */
21 return 0;
22 }
23 /* it's free, grab it */
24 fh->resources |= bit;
25 vv->resources |= bit;
26 DEB_D(("res: get 0x%02x, cur:0x%02x\n",bit,vv->resources));
27 return 1;
28 }
29
saa7146_res_free(struct saa7146_fh * fh,unsigned int bits)30 void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)
31 {
32 struct saa7146_dev *dev = fh->dev;
33 struct saa7146_vv *vv = dev->vv_data;
34
35 BUG_ON((fh->resources & bits) != bits);
36
37 fh->resources &= ~bits;
38 vv->resources &= ~bits;
39 DEB_D(("res: put 0x%02x, cur:0x%02x\n",bits,vv->resources));
40 }
41
42
43 /********************************************************************************/
44 /* common dma functions */
45
saa7146_dma_free(struct saa7146_dev * dev,struct videobuf_queue * q,struct saa7146_buf * buf)46 void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q,
47 struct saa7146_buf *buf)
48 {
49 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
50 DEB_EE(("dev:%p, buf:%p\n",dev,buf));
51
52 BUG_ON(in_interrupt());
53
54 videobuf_waiton(q, &buf->vb, 0, 0);
55 videobuf_dma_unmap(q->dev, dma);
56 videobuf_dma_free(dma);
57 buf->vb.state = VIDEOBUF_NEEDS_INIT;
58 }
59
60
61 /********************************************************************************/
62 /* common buffer functions */
63
saa7146_buffer_queue(struct saa7146_dev * dev,struct saa7146_dmaqueue * q,struct saa7146_buf * buf)64 int saa7146_buffer_queue(struct saa7146_dev *dev,
65 struct saa7146_dmaqueue *q,
66 struct saa7146_buf *buf)
67 {
68 assert_spin_locked(&dev->slock);
69 DEB_EE(("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf));
70
71 BUG_ON(!q);
72
73 if (NULL == q->curr) {
74 q->curr = buf;
75 DEB_D(("immediately activating buffer %p\n", buf));
76 buf->activate(dev,buf,NULL);
77 } else {
78 list_add_tail(&buf->vb.queue,&q->queue);
79 buf->vb.state = VIDEOBUF_QUEUED;
80 DEB_D(("adding buffer %p to queue. (active buffer present)\n", buf));
81 }
82 return 0;
83 }
84
saa7146_buffer_finish(struct saa7146_dev * dev,struct saa7146_dmaqueue * q,int state)85 void saa7146_buffer_finish(struct saa7146_dev *dev,
86 struct saa7146_dmaqueue *q,
87 int state)
88 {
89 assert_spin_locked(&dev->slock);
90 DEB_EE(("dev:%p, dmaq:%p, state:%d\n", dev, q, state));
91 DEB_EE(("q->curr:%p\n",q->curr));
92
93 BUG_ON(!q->curr);
94
95 /* finish current buffer */
96 if (NULL == q->curr) {
97 DEB_D(("aiii. no current buffer\n"));
98 return;
99 }
100
101 q->curr->vb.state = state;
102 do_gettimeofday(&q->curr->vb.ts);
103 wake_up(&q->curr->vb.done);
104
105 q->curr = NULL;
106 }
107
saa7146_buffer_next(struct saa7146_dev * dev,struct saa7146_dmaqueue * q,int vbi)108 void saa7146_buffer_next(struct saa7146_dev *dev,
109 struct saa7146_dmaqueue *q, int vbi)
110 {
111 struct saa7146_buf *buf,*next = NULL;
112
113 BUG_ON(!q);
114
115 DEB_INT(("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi));
116
117 assert_spin_locked(&dev->slock);
118 if (!list_empty(&q->queue)) {
119 /* activate next one from queue */
120 buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
121 list_del(&buf->vb.queue);
122 if (!list_empty(&q->queue))
123 next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
124 q->curr = buf;
125 DEB_INT(("next buffer: buf:%p, prev:%p, next:%p\n", buf, q->queue.prev,q->queue.next));
126 buf->activate(dev,buf,next);
127 } else {
128 DEB_INT(("no next buffer. stopping.\n"));
129 if( 0 != vbi ) {
130 /* turn off video-dma3 */
131 saa7146_write(dev,MC1, MASK_20);
132 } else {
133 /* nothing to do -- just prevent next video-dma1 transfer
134 by lowering the protection address */
135
136 // fixme: fix this for vflip != 0
137
138 saa7146_write(dev, PROT_ADDR1, 0);
139 saa7146_write(dev, MC2, (MASK_02|MASK_18));
140
141 /* write the address of the rps-program */
142 saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
143 /* turn on rps */
144 saa7146_write(dev, MC1, (MASK_12 | MASK_28));
145
146 /*
147 printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
148 printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
149 printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
150 printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
151 printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1));
152 printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
153 */
154 }
155 del_timer(&q->timeout);
156 }
157 }
158
saa7146_buffer_timeout(unsigned long data)159 void saa7146_buffer_timeout(unsigned long data)
160 {
161 struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data;
162 struct saa7146_dev *dev = q->dev;
163 unsigned long flags;
164
165 DEB_EE(("dev:%p, dmaq:%p\n", dev, q));
166
167 spin_lock_irqsave(&dev->slock,flags);
168 if (q->curr) {
169 DEB_D(("timeout on %p\n", q->curr));
170 saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR);
171 }
172
173 /* we don't restart the transfer here like other drivers do. when
174 a streaming capture is disabled, the timeout function will be
175 called for the current buffer. if we activate the next buffer now,
176 we mess up our capture logic. if a timeout occurs on another buffer,
177 then something is seriously broken before, so no need to buffer the
178 next capture IMHO... */
179 /*
180 saa7146_buffer_next(dev,q);
181 */
182 spin_unlock_irqrestore(&dev->slock,flags);
183 }
184
185 /********************************************************************************/
186 /* file operations */
187
fops_open(struct file * file)188 static int fops_open(struct file *file)
189 {
190 struct video_device *vdev = video_devdata(file);
191 struct saa7146_dev *dev = video_drvdata(file);
192 struct saa7146_fh *fh = NULL;
193 int result = 0;
194
195 enum v4l2_buf_type type;
196
197 DEB_EE(("file:%p, dev:%s\n", file, video_device_node_name(vdev)));
198
199 if (mutex_lock_interruptible(&saa7146_devices_lock))
200 return -ERESTARTSYS;
201
202 DEB_D(("using: %p\n",dev));
203
204 type = vdev->vfl_type == VFL_TYPE_GRABBER
205 ? V4L2_BUF_TYPE_VIDEO_CAPTURE
206 : V4L2_BUF_TYPE_VBI_CAPTURE;
207
208 /* check if an extension is registered */
209 if( NULL == dev->ext ) {
210 DEB_S(("no extension registered for this device.\n"));
211 result = -ENODEV;
212 goto out;
213 }
214
215 /* allocate per open data */
216 fh = kzalloc(sizeof(*fh),GFP_KERNEL);
217 if (NULL == fh) {
218 DEB_S(("cannot allocate memory for per open data.\n"));
219 result = -ENOMEM;
220 goto out;
221 }
222
223 file->private_data = fh;
224 fh->dev = dev;
225 fh->type = type;
226
227 if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
228 DEB_S(("initializing vbi...\n"));
229 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
230 result = saa7146_vbi_uops.open(dev,file);
231 if (dev->ext_vv_data->vbi_fops.open)
232 dev->ext_vv_data->vbi_fops.open(file);
233 } else {
234 DEB_S(("initializing video...\n"));
235 result = saa7146_video_uops.open(dev,file);
236 }
237
238 if (0 != result) {
239 goto out;
240 }
241
242 if( 0 == try_module_get(dev->ext->module)) {
243 result = -EINVAL;
244 goto out;
245 }
246
247 result = 0;
248 out:
249 if (fh && result != 0) {
250 kfree(fh);
251 file->private_data = NULL;
252 }
253 mutex_unlock(&saa7146_devices_lock);
254 return result;
255 }
256
fops_release(struct file * file)257 static int fops_release(struct file *file)
258 {
259 struct saa7146_fh *fh = file->private_data;
260 struct saa7146_dev *dev = fh->dev;
261
262 DEB_EE(("file:%p\n", file));
263
264 if (mutex_lock_interruptible(&saa7146_devices_lock))
265 return -ERESTARTSYS;
266
267 if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
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 module_put(dev->ext->module);
277 file->private_data = NULL;
278 kfree(fh);
279
280 mutex_unlock(&saa7146_devices_lock);
281
282 return 0;
283 }
284
fops_mmap(struct file * file,struct vm_area_struct * vma)285 static int fops_mmap(struct file *file, struct vm_area_struct * vma)
286 {
287 struct saa7146_fh *fh = file->private_data;
288 struct videobuf_queue *q;
289
290 switch (fh->type) {
291 case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
292 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma));
293 q = &fh->video_q;
294 break;
295 }
296 case V4L2_BUF_TYPE_VBI_CAPTURE: {
297 DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma));
298 q = &fh->vbi_q;
299 break;
300 }
301 default:
302 BUG();
303 return 0;
304 }
305
306 return videobuf_mmap_mapper(q,vma);
307 }
308
fops_poll(struct file * file,struct poll_table_struct * wait)309 static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
310 {
311 struct saa7146_fh *fh = file->private_data;
312 struct videobuf_buffer *buf = NULL;
313 struct videobuf_queue *q;
314
315 DEB_EE(("file:%p, poll:%p\n",file, wait));
316
317 if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
318 if( 0 == fh->vbi_q.streaming )
319 return videobuf_poll_stream(file, &fh->vbi_q, wait);
320 q = &fh->vbi_q;
321 } else {
322 DEB_D(("using video queue.\n"));
323 q = &fh->video_q;
324 }
325
326 if (!list_empty(&q->stream))
327 buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
328
329 if (!buf) {
330 DEB_D(("buf == NULL!\n"));
331 return POLLERR;
332 }
333
334 poll_wait(file, &buf->done, wait);
335 if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) {
336 DEB_D(("poll succeeded!\n"));
337 return POLLIN|POLLRDNORM;
338 }
339
340 DEB_D(("nothing to poll for, buf->state:%d\n",buf->state));
341 return 0;
342 }
343
fops_read(struct file * file,char __user * data,size_t count,loff_t * ppos)344 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
345 {
346 struct saa7146_fh *fh = file->private_data;
347
348 switch (fh->type) {
349 case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
350 // DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count));
351 return saa7146_video_uops.read(file,data,count,ppos);
352 }
353 case V4L2_BUF_TYPE_VBI_CAPTURE: {
354 // DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count));
355 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
356 return saa7146_vbi_uops.read(file,data,count,ppos);
357 else
358 return -EINVAL;
359 }
360 break;
361 default:
362 BUG();
363 return 0;
364 }
365 }
366
fops_write(struct file * file,const char __user * data,size_t count,loff_t * ppos)367 static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
368 {
369 struct saa7146_fh *fh = file->private_data;
370
371 switch (fh->type) {
372 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
373 return -EINVAL;
374 case V4L2_BUF_TYPE_VBI_CAPTURE:
375 if (fh->dev->ext_vv_data->vbi_fops.write)
376 return fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
377 else
378 return -EINVAL;
379 default:
380 BUG();
381 return -EINVAL;
382 }
383 }
384
385 static const struct v4l2_file_operations video_fops =
386 {
387 .owner = THIS_MODULE,
388 .open = fops_open,
389 .release = fops_release,
390 .read = fops_read,
391 .write = fops_write,
392 .poll = fops_poll,
393 .mmap = fops_mmap,
394 .unlocked_ioctl = video_ioctl2,
395 };
396
vv_callback(struct saa7146_dev * dev,unsigned long status)397 static void vv_callback(struct saa7146_dev *dev, unsigned long status)
398 {
399 u32 isr = status;
400
401 DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status));
402
403 if (0 != (isr & (MASK_27))) {
404 DEB_INT(("irq: RPS0 (0x%08x).\n",isr));
405 saa7146_video_uops.irq_done(dev,isr);
406 }
407
408 if (0 != (isr & (MASK_28))) {
409 u32 mc2 = saa7146_read(dev, MC2);
410 if( 0 != (mc2 & MASK_15)) {
411 DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr));
412 wake_up(&dev->vv_data->vbi_wq);
413 saa7146_write(dev,MC2, MASK_31);
414 return;
415 }
416 DEB_INT(("irq: RPS1 (0x%08x).\n",isr));
417 saa7146_vbi_uops.irq_done(dev,isr);
418 }
419 }
420
saa7146_vv_init(struct saa7146_dev * dev,struct saa7146_ext_vv * ext_vv)421 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
422 {
423 struct saa7146_vv *vv;
424 int err;
425
426 err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
427 if (err)
428 return err;
429
430 vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
431 if (vv == NULL) {
432 ERR(("out of memory. aborting.\n"));
433 return -ENOMEM;
434 }
435 ext_vv->ops = saa7146_video_ioctl_ops;
436 ext_vv->core_ops = &saa7146_video_ioctl_ops;
437
438 DEB_EE(("dev:%p\n",dev));
439
440 /* set default values for video parts of the saa7146 */
441 saa7146_write(dev, BCS_CTRL, 0x80400040);
442
443 /* enable video-port pins */
444 saa7146_write(dev, MC1, (MASK_10 | MASK_26));
445
446 /* save per-device extension data (one extension can
447 handle different devices that might need different
448 configuration data) */
449 dev->ext_vv_data = ext_vv;
450
451 vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);
452 if( NULL == vv->d_clipping.cpu_addr ) {
453 ERR(("out of memory. aborting.\n"));
454 kfree(vv);
455 return -1;
456 }
457 memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);
458
459 saa7146_video_uops.init(dev,vv);
460 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
461 saa7146_vbi_uops.init(dev,vv);
462
463 dev->vv_data = vv;
464 dev->vv_callback = &vv_callback;
465
466 return 0;
467 }
468 EXPORT_SYMBOL_GPL(saa7146_vv_init);
469
saa7146_vv_release(struct saa7146_dev * dev)470 int saa7146_vv_release(struct saa7146_dev* dev)
471 {
472 struct saa7146_vv *vv = dev->vv_data;
473
474 DEB_EE(("dev:%p\n",dev));
475
476 v4l2_device_unregister(&dev->v4l2_dev);
477 pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
478 kfree(vv);
479 dev->vv_data = NULL;
480 dev->vv_callback = NULL;
481
482 return 0;
483 }
484 EXPORT_SYMBOL_GPL(saa7146_vv_release);
485
saa7146_register_device(struct video_device ** vid,struct saa7146_dev * dev,char * name,int type)486 int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
487 char *name, int type)
488 {
489 struct video_device *vfd;
490 int err;
491 int i;
492
493 DEB_EE(("dev:%p, name:'%s', type:%d\n",dev,name,type));
494
495 // released by vfd->release
496 vfd = video_device_alloc();
497 if (vfd == NULL)
498 return -ENOMEM;
499
500 vfd->fops = &video_fops;
501 vfd->ioctl_ops = &dev->ext_vv_data->ops;
502 vfd->release = video_device_release;
503 vfd->lock = &dev->v4l2_lock;
504 vfd->tvnorms = 0;
505 for (i = 0; i < dev->ext_vv_data->num_stds; i++)
506 vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
507 strlcpy(vfd->name, name, sizeof(vfd->name));
508 video_set_drvdata(vfd, dev);
509
510 err = video_register_device(vfd, type, -1);
511 if (err < 0) {
512 ERR(("cannot register v4l2 device. skipping.\n"));
513 video_device_release(vfd);
514 return err;
515 }
516
517 INFO(("%s: registered device %s [v4l2]\n",
518 dev->name, video_device_node_name(vfd)));
519
520 *vid = vfd;
521 return 0;
522 }
523 EXPORT_SYMBOL_GPL(saa7146_register_device);
524
saa7146_unregister_device(struct video_device ** vid,struct saa7146_dev * dev)525 int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
526 {
527 DEB_EE(("dev:%p\n",dev));
528
529 video_unregister_device(*vid);
530 *vid = NULL;
531
532 return 0;
533 }
534 EXPORT_SYMBOL_GPL(saa7146_unregister_device);
535
saa7146_vv_init_module(void)536 static int __init saa7146_vv_init_module(void)
537 {
538 return 0;
539 }
540
541
saa7146_vv_cleanup_module(void)542 static void __exit saa7146_vv_cleanup_module(void)
543 {
544 }
545
546 module_init(saa7146_vv_init_module);
547 module_exit(saa7146_vv_cleanup_module);
548
549 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
550 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
551 MODULE_LICENSE("GPL");
552