1 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
2
3 #include <media/saa7146_vv.h>
4 #include <linux/module.h>
5
6 /****************************************************************************/
7 /* resource management functions, shamelessly stolen from saa7134 driver */
8
saa7146_res_get(struct saa7146_fh * fh,unsigned int bit)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",
16 bit, vv->resources);
17 /* have it already allocated */
18 return 1;
19 }
20
21 /* is it free? */
22 if (vv->resources & bit) {
23 DEB_D("locked! vv->resources:0x%02x, we want:0x%02x\n",
24 vv->resources, bit);
25 /* no, someone else uses it */
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 return 1;
33 }
34
saa7146_res_free(struct saa7146_fh * fh,unsigned int bits)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 fh->resources &= ~bits;
43 vv->resources &= ~bits;
44 DEB_D("res: put 0x%02x, cur:0x%02x\n", bits, vv->resources);
45 }
46
47
48 /********************************************************************************/
49 /* common dma functions */
50
saa7146_dma_free(struct saa7146_dev * dev,struct videobuf_queue * q,struct saa7146_buf * buf)51 void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q,
52 struct saa7146_buf *buf)
53 {
54 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
55 DEB_EE("dev:%p, buf:%p\n", dev, buf);
56
57 BUG_ON(in_interrupt());
58
59 videobuf_waiton(q, &buf->vb, 0, 0);
60 videobuf_dma_unmap(q->dev, dma);
61 videobuf_dma_free(dma);
62 buf->vb.state = VIDEOBUF_NEEDS_INIT;
63 }
64
65
66 /********************************************************************************/
67 /* common buffer functions */
68
saa7146_buffer_queue(struct saa7146_dev * dev,struct saa7146_dmaqueue * q,struct saa7146_buf * buf)69 int saa7146_buffer_queue(struct saa7146_dev *dev,
70 struct saa7146_dmaqueue *q,
71 struct saa7146_buf *buf)
72 {
73 assert_spin_locked(&dev->slock);
74 DEB_EE("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf);
75
76 BUG_ON(!q);
77
78 if (NULL == q->curr) {
79 q->curr = buf;
80 DEB_D("immediately activating buffer %p\n", buf);
81 buf->activate(dev,buf,NULL);
82 } else {
83 list_add_tail(&buf->vb.queue,&q->queue);
84 buf->vb.state = VIDEOBUF_QUEUED;
85 DEB_D("adding buffer %p to queue. (active buffer present)\n",
86 buf);
87 }
88 return 0;
89 }
90
saa7146_buffer_finish(struct saa7146_dev * dev,struct saa7146_dmaqueue * q,int state)91 void saa7146_buffer_finish(struct saa7146_dev *dev,
92 struct saa7146_dmaqueue *q,
93 int state)
94 {
95 assert_spin_locked(&dev->slock);
96 DEB_EE("dev:%p, dmaq:%p, state:%d\n", dev, q, state);
97 DEB_EE("q->curr:%p\n", q->curr);
98
99 BUG_ON(!q->curr);
100
101 /* finish current buffer */
102 if (NULL == q->curr) {
103 DEB_D("aiii. no current buffer\n");
104 return;
105 }
106
107 q->curr->vb.state = state;
108 do_gettimeofday(&q->curr->vb.ts);
109 wake_up(&q->curr->vb.done);
110
111 q->curr = NULL;
112 }
113
saa7146_buffer_next(struct saa7146_dev * dev,struct saa7146_dmaqueue * q,int vbi)114 void saa7146_buffer_next(struct saa7146_dev *dev,
115 struct saa7146_dmaqueue *q, int vbi)
116 {
117 struct saa7146_buf *buf,*next = NULL;
118
119 BUG_ON(!q);
120
121 DEB_INT("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi);
122
123 assert_spin_locked(&dev->slock);
124 if (!list_empty(&q->queue)) {
125 /* activate next one from queue */
126 buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
127 list_del(&buf->vb.queue);
128 if (!list_empty(&q->queue))
129 next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
130 q->curr = buf;
131 DEB_INT("next buffer: buf:%p, prev:%p, next:%p\n",
132 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
saa7146_buffer_timeout(unsigned long data)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
fops_open(struct file * file)195 static int fops_open(struct file *file)
196 {
197 struct video_device *vdev = video_devdata(file);
198 struct saa7146_dev *dev = video_drvdata(file);
199 struct saa7146_fh *fh = NULL;
200 int result = 0;
201
202 enum v4l2_buf_type type;
203
204 DEB_EE("file:%p, dev:%s\n", file, video_device_node_name(vdev));
205
206 if (mutex_lock_interruptible(&saa7146_devices_lock))
207 return -ERESTARTSYS;
208
209 DEB_D("using: %p\n", dev);
210
211 type = vdev->vfl_type == VFL_TYPE_GRABBER
212 ? V4L2_BUF_TYPE_VIDEO_CAPTURE
213 : V4L2_BUF_TYPE_VBI_CAPTURE;
214
215 /* check if an extension is registered */
216 if( NULL == dev->ext ) {
217 DEB_S("no extension registered for this device\n");
218 result = -ENODEV;
219 goto out;
220 }
221
222 /* allocate per open data */
223 fh = kzalloc(sizeof(*fh),GFP_KERNEL);
224 if (NULL == fh) {
225 DEB_S("cannot allocate memory for per open data\n");
226 result = -ENOMEM;
227 goto out;
228 }
229
230 file->private_data = fh;
231 fh->dev = dev;
232 fh->type = type;
233
234 if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
235 DEB_S("initializing vbi...\n");
236 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
237 result = saa7146_vbi_uops.open(dev,file);
238 if (dev->ext_vv_data->vbi_fops.open)
239 dev->ext_vv_data->vbi_fops.open(file);
240 } else {
241 DEB_S("initializing video...\n");
242 result = saa7146_video_uops.open(dev,file);
243 }
244
245 if (0 != result) {
246 goto out;
247 }
248
249 if( 0 == try_module_get(dev->ext->module)) {
250 result = -EINVAL;
251 goto out;
252 }
253
254 result = 0;
255 out:
256 if (fh && result != 0) {
257 kfree(fh);
258 file->private_data = NULL;
259 }
260 mutex_unlock(&saa7146_devices_lock);
261 return result;
262 }
263
fops_release(struct file * file)264 static int fops_release(struct file *file)
265 {
266 struct saa7146_fh *fh = file->private_data;
267 struct saa7146_dev *dev = fh->dev;
268
269 DEB_EE("file:%p\n", file);
270
271 if (mutex_lock_interruptible(&saa7146_devices_lock))
272 return -ERESTARTSYS;
273
274 if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
275 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
276 saa7146_vbi_uops.release(dev,file);
277 if (dev->ext_vv_data->vbi_fops.release)
278 dev->ext_vv_data->vbi_fops.release(file);
279 } else {
280 saa7146_video_uops.release(dev,file);
281 }
282
283 module_put(dev->ext->module);
284 file->private_data = NULL;
285 kfree(fh);
286
287 mutex_unlock(&saa7146_devices_lock);
288
289 return 0;
290 }
291
fops_mmap(struct file * file,struct vm_area_struct * vma)292 static int fops_mmap(struct file *file, struct vm_area_struct * vma)
293 {
294 struct saa7146_fh *fh = file->private_data;
295 struct videobuf_queue *q;
296
297 switch (fh->type) {
298 case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
299 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",
300 file, vma);
301 q = &fh->video_q;
302 break;
303 }
304 case V4L2_BUF_TYPE_VBI_CAPTURE: {
305 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",
306 file, vma);
307 q = &fh->vbi_q;
308 break;
309 }
310 default:
311 BUG();
312 return 0;
313 }
314
315 return videobuf_mmap_mapper(q,vma);
316 }
317
fops_poll(struct file * file,struct poll_table_struct * wait)318 static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
319 {
320 struct saa7146_fh *fh = file->private_data;
321 struct videobuf_buffer *buf = NULL;
322 struct videobuf_queue *q;
323
324 DEB_EE("file:%p, poll:%p\n", file, wait);
325
326 if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
327 if( 0 == fh->vbi_q.streaming )
328 return videobuf_poll_stream(file, &fh->vbi_q, wait);
329 q = &fh->vbi_q;
330 } else {
331 DEB_D("using video queue\n");
332 q = &fh->video_q;
333 }
334
335 if (!list_empty(&q->stream))
336 buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
337
338 if (!buf) {
339 DEB_D("buf == NULL!\n");
340 return POLLERR;
341 }
342
343 poll_wait(file, &buf->done, wait);
344 if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) {
345 DEB_D("poll succeeded!\n");
346 return POLLIN|POLLRDNORM;
347 }
348
349 DEB_D("nothing to poll for, buf->state:%d\n", buf->state);
350 return 0;
351 }
352
fops_read(struct file * file,char __user * data,size_t count,loff_t * ppos)353 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
354 {
355 struct saa7146_fh *fh = file->private_data;
356
357 switch (fh->type) {
358 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
359 /*
360 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun",
361 file, data, (unsigned long)count);
362 */
363 return saa7146_video_uops.read(file,data,count,ppos);
364 case V4L2_BUF_TYPE_VBI_CAPTURE:
365 /*
366 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n",
367 file, data, (unsigned long)count);
368 */
369 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
370 return saa7146_vbi_uops.read(file,data,count,ppos);
371 return -EINVAL;
372 default:
373 BUG();
374 return 0;
375 }
376 }
377
fops_write(struct file * file,const char __user * data,size_t count,loff_t * ppos)378 static ssize_t fops_write(struct file *file, const 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 return -EINVAL;
385 case V4L2_BUF_TYPE_VBI_CAPTURE:
386 if (fh->dev->ext_vv_data->vbi_fops.write)
387 return fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
388 else
389 return -EINVAL;
390 default:
391 BUG();
392 return -EINVAL;
393 }
394 }
395
396 static const struct v4l2_file_operations video_fops =
397 {
398 .owner = THIS_MODULE,
399 .open = fops_open,
400 .release = fops_release,
401 .read = fops_read,
402 .write = fops_write,
403 .poll = fops_poll,
404 .mmap = fops_mmap,
405 .unlocked_ioctl = video_ioctl2,
406 };
407
vv_callback(struct saa7146_dev * dev,unsigned long status)408 static void vv_callback(struct saa7146_dev *dev, unsigned long status)
409 {
410 u32 isr = status;
411
412 DEB_INT("dev:%p, isr:0x%08x\n", dev, (u32)status);
413
414 if (0 != (isr & (MASK_27))) {
415 DEB_INT("irq: RPS0 (0x%08x)\n", isr);
416 saa7146_video_uops.irq_done(dev,isr);
417 }
418
419 if (0 != (isr & (MASK_28))) {
420 u32 mc2 = saa7146_read(dev, MC2);
421 if( 0 != (mc2 & MASK_15)) {
422 DEB_INT("irq: RPS1 vbi workaround (0x%08x)\n", isr);
423 wake_up(&dev->vv_data->vbi_wq);
424 saa7146_write(dev,MC2, MASK_31);
425 return;
426 }
427 DEB_INT("irq: RPS1 (0x%08x)\n", isr);
428 saa7146_vbi_uops.irq_done(dev,isr);
429 }
430 }
431
saa7146_vv_init(struct saa7146_dev * dev,struct saa7146_ext_vv * ext_vv)432 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
433 {
434 struct saa7146_vv *vv;
435 int err;
436
437 err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
438 if (err)
439 return err;
440
441 vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
442 if (vv == NULL) {
443 ERR("out of memory. aborting.\n");
444 return -ENOMEM;
445 }
446 ext_vv->ops = saa7146_video_ioctl_ops;
447 ext_vv->core_ops = &saa7146_video_ioctl_ops;
448
449 DEB_EE("dev:%p\n", dev);
450
451 /* set default values for video parts of the saa7146 */
452 saa7146_write(dev, BCS_CTRL, 0x80400040);
453
454 /* enable video-port pins */
455 saa7146_write(dev, MC1, (MASK_10 | MASK_26));
456
457 /* save per-device extension data (one extension can
458 handle different devices that might need different
459 configuration data) */
460 dev->ext_vv_data = ext_vv;
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 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
472 saa7146_vbi_uops.init(dev,vv);
473
474 dev->vv_data = vv;
475 dev->vv_callback = &vv_callback;
476
477 return 0;
478 }
479 EXPORT_SYMBOL_GPL(saa7146_vv_init);
480
saa7146_vv_release(struct saa7146_dev * dev)481 int saa7146_vv_release(struct saa7146_dev* dev)
482 {
483 struct saa7146_vv *vv = dev->vv_data;
484
485 DEB_EE("dev:%p\n", dev);
486
487 v4l2_device_unregister(&dev->v4l2_dev);
488 pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
489 kfree(vv);
490 dev->vv_data = NULL;
491 dev->vv_callback = NULL;
492
493 return 0;
494 }
495 EXPORT_SYMBOL_GPL(saa7146_vv_release);
496
saa7146_register_device(struct video_device ** vid,struct saa7146_dev * dev,char * name,int type)497 int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
498 char *name, int type)
499 {
500 struct video_device *vfd;
501 int err;
502 int i;
503
504 DEB_EE("dev:%p, name:'%s', type:%d\n", dev, name, type);
505
506 // released by vfd->release
507 vfd = video_device_alloc();
508 if (vfd == NULL)
509 return -ENOMEM;
510
511 vfd->fops = &video_fops;
512 vfd->ioctl_ops = &dev->ext_vv_data->ops;
513 vfd->release = video_device_release;
514 vfd->lock = &dev->v4l2_lock;
515 vfd->tvnorms = 0;
516 for (i = 0; i < dev->ext_vv_data->num_stds; i++)
517 vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
518 strlcpy(vfd->name, name, sizeof(vfd->name));
519 video_set_drvdata(vfd, dev);
520
521 err = video_register_device(vfd, type, -1);
522 if (err < 0) {
523 ERR("cannot register v4l2 device. skipping.\n");
524 video_device_release(vfd);
525 return err;
526 }
527
528 pr_info("%s: registered device %s [v4l2]\n",
529 dev->name, video_device_node_name(vfd));
530
531 *vid = vfd;
532 return 0;
533 }
534 EXPORT_SYMBOL_GPL(saa7146_register_device);
535
saa7146_unregister_device(struct video_device ** vid,struct saa7146_dev * dev)536 int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
537 {
538 DEB_EE("dev:%p\n", dev);
539
540 video_unregister_device(*vid);
541 *vid = NULL;
542
543 return 0;
544 }
545 EXPORT_SYMBOL_GPL(saa7146_unregister_device);
546
saa7146_vv_init_module(void)547 static int __init saa7146_vv_init_module(void)
548 {
549 return 0;
550 }
551
552
saa7146_vv_cleanup_module(void)553 static void __exit saa7146_vv_cleanup_module(void)
554 {
555 }
556
557 module_init(saa7146_vv_init_module);
558 module_exit(saa7146_vv_cleanup_module);
559
560 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
561 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
562 MODULE_LICENSE("GPL");
563