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1 #include <media/saa7146_vv.h>
2 #include <linux/version.h>
3
4 #define BOARD_CAN_DO_VBI(dev) (dev->revision != 0 && dev->vv_data->vbi_minor != -1)
5
6 /****************************************************************************/
7 /* resource management functions, shamelessly stolen from saa7134 driver */
8
9 int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
10 {
11 struct saa7146_dev *dev = fh->dev;
12 struct saa7146_vv *vv = dev->vv_data;
13
14 if (fh->resources & bit) {
15 DEB_D(("already allocated! want: 0x%02x, cur:0x%02x\n",bit,vv->resources));
16 /* have it already allocated */
17 return 1;
18 }
19
20 /* is it free? */
21 down(&dev->lock);
22 if (vv->resources & bit) {
23 DEB_D(("locked! vv->resources:0x%02x, we want:0x%02x\n",vv->resources,bit));
24 /* no, someone else uses it */
25 up(&dev->lock);
26 return 0;
27 }
28 /* it's free, grab it */
29 fh->resources |= bit;
30 vv->resources |= bit;
31 DEB_D(("res: get 0x%02x, cur:0x%02x\n",bit,vv->resources));
32 up(&dev->lock);
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 if ((fh->resources & bits) != bits)
42 BUG();
43
44 down(&dev->lock);
45 fh->resources &= ~bits;
46 vv->resources &= ~bits;
47 DEB_D(("res: put 0x%02x, cur:0x%02x\n",bits,vv->resources));
48 up(&dev->lock);
49 }
50
51
52 /********************************************************************************/
53 /* common dma functions */
54
55 void saa7146_dma_free(struct saa7146_dev *dev,struct saa7146_buf *buf)
56 {
57 DEB_EE(("dev:%p, buf:%p\n",dev,buf));
58
59 if (in_interrupt())
60 BUG();
61
62 videobuf_waiton(&buf->vb,0,0);
63 videobuf_dma_pci_unmap(dev->pci, &buf->vb.dma);
64 videobuf_dma_free(&buf->vb.dma);
65 buf->vb.state = STATE_NEEDS_INIT;
66 }
67
68
69 /********************************************************************************/
70 /* common buffer functions */
71
72 int saa7146_buffer_queue(struct saa7146_dev *dev,
73 struct saa7146_dmaqueue *q,
74 struct saa7146_buf *buf)
75 {
76 assert_spin_locked(&dev->slock);
77 DEB_EE(("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf));
78
79 BUG_ON(!q);
80
81 if (NULL == q->curr) {
82 q->curr = buf;
83 DEB_D(("immediately activating buffer %p\n", buf));
84 buf->activate(dev,buf,NULL);
85 } else {
86 list_add_tail(&buf->vb.queue,&q->queue);
87 buf->vb.state = STATE_QUEUED;
88 DEB_D(("adding buffer %p to queue. (active buffer present)\n", buf));
89 }
90 return 0;
91 }
92
93 void saa7146_buffer_finish(struct saa7146_dev *dev,
94 struct saa7146_dmaqueue *q,
95 int state)
96 {
97 assert_spin_locked(&dev->slock);
98 DEB_EE(("dev:%p, dmaq:%p, state:%d\n", dev, q, state));
99 DEB_EE(("q->curr:%p\n",q->curr));
100
101 BUG_ON(!q->curr);
102
103 /* finish current buffer */
104 if (NULL == q->curr) {
105 DEB_D(("aiii. no current buffer\n"));
106 return;
107 }
108
109 q->curr->vb.state = state;
110 do_gettimeofday(&q->curr->vb.ts);
111 wake_up(&q->curr->vb.done);
112
113 q->curr = NULL;
114 }
115
116 void saa7146_buffer_next(struct saa7146_dev *dev,
117 struct saa7146_dmaqueue *q, int vbi)
118 {
119 struct saa7146_buf *buf,*next = NULL;
120
121 BUG_ON(!q);
122
123 DEB_INT(("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi));
124
125 assert_spin_locked(&dev->slock);
126 if (!list_empty(&q->queue)) {
127 /* activate next one from queue */
128 buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
129 list_del(&buf->vb.queue);
130 if (!list_empty(&q->queue))
131 next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
132 q->curr = buf;
133 DEB_INT(("next buffer: buf:%p, prev:%p, next:%p\n", buf, q->queue.prev,q->queue.next));
134 buf->activate(dev,buf,next);
135 } else {
136 DEB_INT(("no next buffer. stopping.\n"));
137 if( 0 != vbi ) {
138 /* turn off video-dma3 */
139 saa7146_write(dev,MC1, MASK_20);
140 } else {
141 /* nothing to do -- just prevent next video-dma1 transfer
142 by lowering the protection address */
143
144 // fixme: fix this for vflip != 0
145
146 saa7146_write(dev, PROT_ADDR1, 0);
147 saa7146_write(dev, MC2, (MASK_02|MASK_18));
148
149 /* write the address of the rps-program */
150 saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
151 /* turn on rps */
152 saa7146_write(dev, MC1, (MASK_12 | MASK_28));
153
154 /*
155 printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
156 printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
157 printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
158 printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
159 printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1));
160 printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
161 */
162 }
163 del_timer(&q->timeout);
164 }
165 }
166
167 void saa7146_buffer_timeout(unsigned long data)
168 {
169 struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data;
170 struct saa7146_dev *dev = q->dev;
171 unsigned long flags;
172
173 DEB_EE(("dev:%p, dmaq:%p\n", dev, q));
174
175 spin_lock_irqsave(&dev->slock,flags);
176 if (q->curr) {
177 DEB_D(("timeout on %p\n", q->curr));
178 saa7146_buffer_finish(dev,q,STATE_ERROR);
179 }
180
181 /* we don't restart the transfer here like other drivers do. when
182 a streaming capture is disabled, the timeout function will be
183 called for the current buffer. if we activate the next buffer now,
184 we mess up our capture logic. if a timeout occurs on another buffer,
185 then something is seriously broken before, so no need to buffer the
186 next capture IMHO... */
187 /*
188 saa7146_buffer_next(dev,q);
189 */
190 spin_unlock_irqrestore(&dev->slock,flags);
191 }
192
193 /********************************************************************************/
194 /* file operations */
195
196 static int fops_open(struct inode *inode, struct file *file)
197 {
198 unsigned int minor = iminor(inode);
199 struct saa7146_dev *h = NULL, *dev = NULL;
200 struct list_head *list;
201 struct saa7146_fh *fh = NULL;
202 int result = 0;
203
204 enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
205
206 DEB_EE(("inode:%p, file:%p, minor:%d\n",inode,file,minor));
207
208 if (down_interruptible(&saa7146_devices_lock))
209 return -ERESTARTSYS;
210
211 list_for_each(list,&saa7146_devices) {
212 h = list_entry(list, struct saa7146_dev, item);
213 if( NULL == h->vv_data ) {
214 DEB_D(("device %p has not registered video devices.\n",h));
215 continue;
216 }
217 DEB_D(("trying: %p @ major %d,%d\n",h,h->vv_data->video_minor,h->vv_data->vbi_minor));
218
219 if (h->vv_data->video_minor == minor) {
220 dev = h;
221 }
222 if (h->vv_data->vbi_minor == minor) {
223 type = V4L2_BUF_TYPE_VBI_CAPTURE;
224 dev = h;
225 }
226 }
227 if (NULL == dev) {
228 DEB_S(("no such video device.\n"));
229 result = -ENODEV;
230 goto out;
231 }
232
233 DEB_D(("using: %p\n",dev));
234
235 /* check if an extension is registered */
236 if( NULL == dev->ext ) {
237 DEB_S(("no extension registered for this device.\n"));
238 result = -ENODEV;
239 goto out;
240 }
241
242 /* allocate per open data */
243 fh = kmalloc(sizeof(*fh),GFP_KERNEL);
244 if (NULL == fh) {
245 DEB_S(("cannot allocate memory for per open data.\n"));
246 result = -ENOMEM;
247 goto out;
248 }
249 memset(fh,0,sizeof(*fh));
250
251 file->private_data = fh;
252 fh->dev = dev;
253 fh->type = type;
254
255 if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
256 DEB_S(("initializing vbi...\n"));
257 result = saa7146_vbi_uops.open(dev,file);
258 } else {
259 DEB_S(("initializing video...\n"));
260 result = saa7146_video_uops.open(dev,file);
261 }
262
263 if (0 != result) {
264 goto out;
265 }
266
267 if( 0 == try_module_get(dev->ext->module)) {
268 result = -EINVAL;
269 goto out;
270 }
271
272 result = 0;
273 out:
274 if( fh != 0 && result != 0 ) {
275 kfree(fh);
276 file->private_data = NULL;
277 }
278 up(&saa7146_devices_lock);
279 return result;
280 }
281
282 static int fops_release(struct inode *inode, struct file *file)
283 {
284 struct saa7146_fh *fh = file->private_data;
285 struct saa7146_dev *dev = fh->dev;
286
287 DEB_EE(("inode:%p, file:%p\n",inode,file));
288
289 if (down_interruptible(&saa7146_devices_lock))
290 return -ERESTARTSYS;
291
292 if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
293 saa7146_vbi_uops.release(dev,file);
294 } else {
295 saa7146_video_uops.release(dev,file);
296 }
297
298 module_put(dev->ext->module);
299 file->private_data = NULL;
300 kfree(fh);
301
302 up(&saa7146_devices_lock);
303
304 return 0;
305 }
306
307 int saa7146_video_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg);
308 static int fops_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
309 {
310 /*
311 DEB_EE(("inode:%p, file:%p, cmd:%d, arg:%li\n",inode, file, cmd, arg));
312 */
313 return video_usercopy(inode, file, cmd, arg, saa7146_video_do_ioctl);
314 }
315
316 static int fops_mmap(struct file *file, struct vm_area_struct * vma)
317 {
318 struct saa7146_fh *fh = file->private_data;
319 struct videobuf_queue *q;
320
321 switch (fh->type) {
322 case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
323 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma));
324 q = &fh->video_q;
325 break;
326 }
327 case V4L2_BUF_TYPE_VBI_CAPTURE: {
328 DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma));
329 q = &fh->vbi_q;
330 break;
331 }
332 default:
333 BUG();
334 return 0;
335 }
336 return videobuf_mmap_mapper(q,vma);
337 }
338
339 static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
340 {
341 struct saa7146_fh *fh = file->private_data;
342 struct videobuf_buffer *buf = NULL;
343 struct videobuf_queue *q;
344
345 DEB_EE(("file:%p, poll:%p\n",file, wait));
346
347 if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
348 if( 0 == fh->vbi_q.streaming )
349 return videobuf_poll_stream(file, &fh->vbi_q, wait);
350 q = &fh->vbi_q;
351 } else {
352 DEB_D(("using video queue.\n"));
353 q = &fh->video_q;
354 }
355
356 if (!list_empty(&q->stream))
357 buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
358
359 if (!buf) {
360 DEB_D(("buf == NULL!\n"));
361 return POLLERR;
362 }
363
364 poll_wait(file, &buf->done, wait);
365 if (buf->state == STATE_DONE || buf->state == STATE_ERROR) {
366 DEB_D(("poll succeeded!\n"));
367 return POLLIN|POLLRDNORM;
368 }
369
370 DEB_D(("nothing to poll for, buf->state:%d\n",buf->state));
371 return 0;
372 }
373
374 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
375 {
376 struct saa7146_fh *fh = file->private_data;
377
378 switch (fh->type) {
379 case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
380 // DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count));
381 return saa7146_video_uops.read(file,data,count,ppos);
382 }
383 case V4L2_BUF_TYPE_VBI_CAPTURE: {
384 // DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count));
385 return saa7146_vbi_uops.read(file,data,count,ppos);
386 }
387 break;
388 default:
389 BUG();
390 return 0;
391 }
392 }
393
394 static struct file_operations video_fops =
395 {
396 .owner = THIS_MODULE,
397 .open = fops_open,
398 .release = fops_release,
399 .read = fops_read,
400 .poll = fops_poll,
401 .mmap = fops_mmap,
402 .ioctl = fops_ioctl,
403 .llseek = no_llseek,
404 };
405
406 static void vv_callback(struct saa7146_dev *dev, unsigned long status)
407 {
408 u32 isr = status;
409
410 DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status));
411
412 if (0 != (isr & (MASK_27))) {
413 DEB_INT(("irq: RPS0 (0x%08x).\n",isr));
414 saa7146_video_uops.irq_done(dev,isr);
415 }
416
417 if (0 != (isr & (MASK_28))) {
418 u32 mc2 = saa7146_read(dev, MC2);
419 if( 0 != (mc2 & MASK_15)) {
420 DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr));
421 wake_up(&dev->vv_data->vbi_wq);
422 saa7146_write(dev,MC2, MASK_31);
423 return;
424 }
425 DEB_INT(("irq: RPS1 (0x%08x).\n",isr));
426 saa7146_vbi_uops.irq_done(dev,isr);
427 }
428 }
429
430 static struct video_device device_template =
431 {
432 .hardware = VID_HARDWARE_SAA7146,
433 .fops = &video_fops,
434 .minor = -1,
435 };
436
437 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
438 {
439 struct saa7146_vv *vv = kmalloc (sizeof(struct saa7146_vv),GFP_KERNEL);
440 if( NULL == vv ) {
441 ERR(("out of memory. aborting.\n"));
442 return -1;
443 }
444 memset(vv, 0x0, sizeof(*vv));
445
446 DEB_EE(("dev:%p\n",dev));
447
448 /* set default values for video parts of the saa7146 */
449 saa7146_write(dev, BCS_CTRL, 0x80400040);
450
451 /* enable video-port pins */
452 saa7146_write(dev, MC1, (MASK_10 | MASK_26));
453
454 /* save per-device extension data (one extension can
455 handle different devices that might need different
456 configuration data) */
457 dev->ext_vv_data = ext_vv;
458
459 vv->video_minor = -1;
460 vv->vbi_minor = -1;
461
462 vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);
463 if( NULL == vv->d_clipping.cpu_addr ) {
464 ERR(("out of memory. aborting.\n"));
465 kfree(vv);
466 return -1;
467 }
468 memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);
469
470 saa7146_video_uops.init(dev,vv);
471 saa7146_vbi_uops.init(dev,vv);
472
473 dev->vv_data = vv;
474 dev->vv_callback = &vv_callback;
475
476 return 0;
477 }
478
479 int saa7146_vv_release(struct saa7146_dev* dev)
480 {
481 struct saa7146_vv *vv = dev->vv_data;
482
483 DEB_EE(("dev:%p\n",dev));
484
485 pci_free_consistent(dev->pci, SAA7146_RPS_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
486 kfree(vv);
487 dev->vv_data = NULL;
488 dev->vv_callback = NULL;
489
490 return 0;
491 }
492
493 int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
494 char *name, int type)
495 {
496 struct saa7146_vv *vv = dev->vv_data;
497 struct video_device *vfd;
498
499 DEB_EE(("dev:%p, name:'%s', type:%d\n",dev,name,type));
500
501 // released by vfd->release
502 vfd = video_device_alloc();
503 if (vfd == NULL)
504 return -ENOMEM;
505
506 memcpy(vfd, &device_template, sizeof(struct video_device));
507 strlcpy(vfd->name, name, sizeof(vfd->name));
508 vfd->release = video_device_release;
509 vfd->priv = dev;
510
511 // fixme: -1 should be an insmod parameter *for the extension* (like "video_nr");
512 if (video_register_device(vfd, type, -1) < 0) {
513 ERR(("cannot register v4l2 device. skipping.\n"));
514 return -1;
515 }
516
517 if( VFL_TYPE_GRABBER == type ) {
518 vv->video_minor = vfd->minor;
519 INFO(("%s: registered device video%d [v4l2]\n",
520 dev->name, vfd->minor & 0x1f));
521 } else {
522 vv->vbi_minor = vfd->minor;
523 INFO(("%s: registered device vbi%d [v4l2]\n",
524 dev->name, vfd->minor & 0x1f));
525 }
526
527 *vid = vfd;
528 return 0;
529 }
530
531 int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
532 {
533 struct saa7146_vv *vv = dev->vv_data;
534
535 DEB_EE(("dev:%p\n",dev));
536
537 if( VFL_TYPE_GRABBER == (*vid)->type ) {
538 vv->video_minor = -1;
539 } else {
540 vv->vbi_minor = -1;
541 }
542
543 video_unregister_device(*vid);
544 *vid = NULL;
545
546 return 0;
547 }
548
549 static int __init saa7146_vv_init_module(void)
550 {
551 return 0;
552 }
553
554
555 static void __exit saa7146_vv_cleanup_module(void)
556 {
557 }
558
559 module_init(saa7146_vv_init_module);
560 module_exit(saa7146_vv_cleanup_module);
561
562 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
563 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
564 MODULE_LICENSE("GPL");
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