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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
9int 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
35void 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
51void 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
69int 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
91void 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
114void 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
166void 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
195static 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 DEB_EE("file:%p, dev:%s\n", file, video_device_node_name(vdev));
203
204 if (mutex_lock_interruptible(&saa7146_devices_lock))
205 return -ERESTARTSYS;
206
207 DEB_D("using: %p\n", dev);
208
209 /* check if an extension is registered */
210 if( NULL == dev->ext ) {
211 DEB_S("no extension registered for this device\n");
212 result = -ENODEV;
213 goto out;
214 }
215
216 /* allocate per open data */
217 fh = kzalloc(sizeof(*fh),GFP_KERNEL);
218 if (NULL == fh) {
219 DEB_S("cannot allocate memory for per open data\n");
220 result = -ENOMEM;
221 goto out;
222 }
223
224 v4l2_fh_init(&fh->fh, vdev);
225
226 file->private_data = &fh->fh;
227 fh->dev = dev;
228
229 if (vdev->vfl_type == VFL_TYPE_VBI) {
230 DEB_S("initializing vbi...\n");
231 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
232 result = saa7146_vbi_uops.open(dev,file);
233 if (dev->ext_vv_data->vbi_fops.open)
234 dev->ext_vv_data->vbi_fops.open(file);
235 } else {
236 DEB_S("initializing video...\n");
237 result = saa7146_video_uops.open(dev,file);
238 }
239
240 if (0 != result) {
241 goto out;
242 }
243
244 if( 0 == try_module_get(dev->ext->module)) {
245 result = -EINVAL;
246 goto out;
247 }
248
249 result = 0;
250 v4l2_fh_add(&fh->fh);
251out:
252 if (fh && result != 0) {
253 kfree(fh);
254 file->private_data = NULL;
255 }
256 mutex_unlock(&saa7146_devices_lock);
257 return result;
258}
259
260static int fops_release(struct file *file)
261{
262 struct video_device *vdev = video_devdata(file);
263 struct saa7146_fh *fh = file->private_data;
264 struct saa7146_dev *dev = fh->dev;
265
266 DEB_EE("file:%p\n", file);
267
268 if (mutex_lock_interruptible(&saa7146_devices_lock))
269 return -ERESTARTSYS;
270
271 if (vdev->vfl_type == VFL_TYPE_VBI) {
272 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
273 saa7146_vbi_uops.release(dev,file);
274 if (dev->ext_vv_data->vbi_fops.release)
275 dev->ext_vv_data->vbi_fops.release(file);
276 } else {
277 saa7146_video_uops.release(dev,file);
278 }
279
280 v4l2_fh_del(&fh->fh);
281 v4l2_fh_exit(&fh->fh);
282 module_put(dev->ext->module);
283 file->private_data = NULL;
284 kfree(fh);
285
286 mutex_unlock(&saa7146_devices_lock);
287
288 return 0;
289}
290
291static int fops_mmap(struct file *file, struct vm_area_struct * vma)
292{
293 struct video_device *vdev = video_devdata(file);
294 struct saa7146_fh *fh = file->private_data;
295 struct videobuf_queue *q;
296
297 switch (vdev->vfl_type) {
298 case VFL_TYPE_GRABBER: {
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 VFL_TYPE_VBI: {
305 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",
306 file, vma);
307 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT)
308 return -ENODEV;
309 q = &fh->vbi_q;
310 break;
311 }
312 default:
313 BUG();
314 return 0;
315 }
316
317 return videobuf_mmap_mapper(q,vma);
318}
319
320static unsigned int 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 unsigned int 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 | POLLOUT | POLLWRNORM;
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 | POLLERR;
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 | POLLIN | POLLRDNORM;
353 }
354
355 DEB_D("nothing to poll for, buf->state:%d\n", buf->state);
356 return res;
357}
358
359static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
360{
361 struct video_device *vdev = video_devdata(file);
362 struct saa7146_fh *fh = file->private_data;
363
364 switch (vdev->vfl_type) {
365 case VFL_TYPE_GRABBER:
366/*
367 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun",
368 file, data, (unsigned long)count);
369*/
370 return saa7146_video_uops.read(file,data,count,ppos);
371 case VFL_TYPE_VBI:
372/*
373 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n",
374 file, data, (unsigned long)count);
375*/
376 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
377 return saa7146_vbi_uops.read(file,data,count,ppos);
378 return -EINVAL;
379 default:
380 BUG();
381 return 0;
382 }
383}
384
385static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
386{
387 struct video_device *vdev = video_devdata(file);
388 struct saa7146_fh *fh = file->private_data;
389
390 switch (vdev->vfl_type) {
391 case VFL_TYPE_GRABBER:
392 return -EINVAL;
393 case VFL_TYPE_VBI:
394 if (fh->dev->ext_vv_data->vbi_fops.write)
395 return fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
396 else
397 return -EINVAL;
398 default:
399 BUG();
400 return -EINVAL;
401 }
402}
403
404static const struct v4l2_file_operations video_fops =
405{
406 .owner = THIS_MODULE,
407 .open = fops_open,
408 .release = fops_release,
409 .read = fops_read,
410 .write = fops_write,
411 .poll = fops_poll,
412 .mmap = fops_mmap,
413 .unlocked_ioctl = video_ioctl2,
414};
415
416static void vv_callback(struct saa7146_dev *dev, unsigned long status)
417{
418 u32 isr = status;
419
420 DEB_INT("dev:%p, isr:0x%08x\n", dev, (u32)status);
421
422 if (0 != (isr & (MASK_27))) {
423 DEB_INT("irq: RPS0 (0x%08x)\n", isr);
424 saa7146_video_uops.irq_done(dev,isr);
425 }
426
427 if (0 != (isr & (MASK_28))) {
428 u32 mc2 = saa7146_read(dev, MC2);
429 if( 0 != (mc2 & MASK_15)) {
430 DEB_INT("irq: RPS1 vbi workaround (0x%08x)\n", isr);
431 wake_up(&dev->vv_data->vbi_wq);
432 saa7146_write(dev,MC2, MASK_31);
433 return;
434 }
435 DEB_INT("irq: RPS1 (0x%08x)\n", isr);
436 saa7146_vbi_uops.irq_done(dev,isr);
437 }
438}
439
440static const struct v4l2_ctrl_ops saa7146_ctrl_ops = {
441 .s_ctrl = saa7146_s_ctrl,
442};
443
444int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
445{
446 struct v4l2_ctrl_handler *hdl = &dev->ctrl_handler;
447 struct v4l2_pix_format *fmt;
448 struct v4l2_vbi_format *vbi;
449 struct saa7146_vv *vv;
450 int err;
451
452 err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
453 if (err)
454 return err;
455
456 v4l2_ctrl_handler_init(hdl, 6);
457 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
458 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
459 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
460 V4L2_CID_CONTRAST, 0, 127, 1, 64);
461 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
462 V4L2_CID_SATURATION, 0, 127, 1, 64);
463 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
464 V4L2_CID_VFLIP, 0, 1, 1, 0);
465 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
466 V4L2_CID_HFLIP, 0, 1, 1, 0);
467 if (hdl->error) {
468 err = hdl->error;
469 v4l2_ctrl_handler_free(hdl);
470 return err;
471 }
472 dev->v4l2_dev.ctrl_handler = hdl;
473
474 vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
475 if (vv == NULL) {
476 ERR("out of memory. aborting.\n");
477 v4l2_ctrl_handler_free(hdl);
478 return -ENOMEM;
479 }
480 ext_vv->vid_ops = saa7146_video_ioctl_ops;
481 ext_vv->vbi_ops = saa7146_vbi_ioctl_ops;
482 ext_vv->core_ops = &saa7146_video_ioctl_ops;
483
484 DEB_EE("dev:%p\n", dev);
485
486 /* set default values for video parts of the saa7146 */
487 saa7146_write(dev, BCS_CTRL, 0x80400040);
488
489 /* enable video-port pins */
490 saa7146_write(dev, MC1, (MASK_10 | MASK_26));
491
492 /* save per-device extension data (one extension can
493 handle different devices that might need different
494 configuration data) */
495 dev->ext_vv_data = ext_vv;
496
497 vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);
498 if( NULL == vv->d_clipping.cpu_addr ) {
499 ERR("out of memory. aborting.\n");
500 kfree(vv);
501 v4l2_ctrl_handler_free(hdl);
502 return -1;
503 }
504 memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);
505
506 saa7146_video_uops.init(dev,vv);
507 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
508 saa7146_vbi_uops.init(dev,vv);
509
510 fmt = &vv->ov_fb.fmt;
511 fmt->width = vv->standard->h_max_out;
512 fmt->height = vv->standard->v_max_out;
513 fmt->pixelformat = V4L2_PIX_FMT_RGB565;
514 fmt->bytesperline = 2 * fmt->width;
515 fmt->sizeimage = fmt->bytesperline * fmt->height;
516 fmt->colorspace = V4L2_COLORSPACE_SRGB;
517
518 fmt = &vv->video_fmt;
519 fmt->width = 384;
520 fmt->height = 288;
521 fmt->pixelformat = V4L2_PIX_FMT_BGR24;
522 fmt->field = V4L2_FIELD_ANY;
523 fmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
524 fmt->bytesperline = 3 * fmt->width;
525 fmt->sizeimage = fmt->bytesperline * fmt->height;
526
527 vbi = &vv->vbi_fmt;
528 vbi->sampling_rate = 27000000;
529 vbi->offset = 248; /* todo */
530 vbi->samples_per_line = 720 * 2;
531 vbi->sample_format = V4L2_PIX_FMT_GREY;
532
533 /* fixme: this only works for PAL */
534 vbi->start[0] = 5;
535 vbi->count[0] = 16;
536 vbi->start[1] = 312;
537 vbi->count[1] = 16;
538
539 init_timer(&vv->vbi_read_timeout);
540
541 vv->ov_fb.capability = V4L2_FBUF_CAP_LIST_CLIPPING;
542 vv->ov_fb.flags = V4L2_FBUF_FLAG_PRIMARY;
543 dev->vv_data = vv;
544 dev->vv_callback = &vv_callback;
545
546 return 0;
547}
548EXPORT_SYMBOL_GPL(saa7146_vv_init);
549
550int saa7146_vv_release(struct saa7146_dev* dev)
551{
552 struct saa7146_vv *vv = dev->vv_data;
553
554 DEB_EE("dev:%p\n", dev);
555
556 v4l2_device_unregister(&dev->v4l2_dev);
557 pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
558 v4l2_ctrl_handler_free(&dev->ctrl_handler);
559 kfree(vv);
560 dev->vv_data = NULL;
561 dev->vv_callback = NULL;
562
563 return 0;
564}
565EXPORT_SYMBOL_GPL(saa7146_vv_release);
566
567int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
568 char *name, int type)
569{
570 struct video_device *vfd;
571 int err;
572 int i;
573
574 DEB_EE("dev:%p, name:'%s', type:%d\n", dev, name, type);
575
576 // released by vfd->release
577 vfd = video_device_alloc();
578 if (vfd == NULL)
579 return -ENOMEM;
580
581 vfd->fops = &video_fops;
582 if (type == VFL_TYPE_GRABBER)
583 vfd->ioctl_ops = &dev->ext_vv_data->vid_ops;
584 else
585 vfd->ioctl_ops = &dev->ext_vv_data->vbi_ops;
586 vfd->release = video_device_release;
587 /* Locking in file operations other than ioctl should be done by
588 the driver, not the V4L2 core.
589 This driver needs auditing so that this flag can be removed. */
590 set_bit(V4L2_FL_LOCK_ALL_FOPS, &vfd->flags);
591 vfd->lock = &dev->v4l2_lock;
592 vfd->v4l2_dev = &dev->v4l2_dev;
593 vfd->tvnorms = 0;
594 set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
595 for (i = 0; i < dev->ext_vv_data->num_stds; i++)
596 vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
597 strlcpy(vfd->name, name, sizeof(vfd->name));
598 video_set_drvdata(vfd, dev);
599
600 err = video_register_device(vfd, type, -1);
601 if (err < 0) {
602 ERR("cannot register v4l2 device. skipping.\n");
603 video_device_release(vfd);
604 return err;
605 }
606
607 pr_info("%s: registered device %s [v4l2]\n",
608 dev->name, video_device_node_name(vfd));
609
610 *vid = vfd;
611 return 0;
612}
613EXPORT_SYMBOL_GPL(saa7146_register_device);
614
615int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
616{
617 DEB_EE("dev:%p\n", dev);
618
619 video_unregister_device(*vid);
620 *vid = NULL;
621
622 return 0;
623}
624EXPORT_SYMBOL_GPL(saa7146_unregister_device);
625
626static int __init saa7146_vv_init_module(void)
627{
628 return 0;
629}
630
631
632static void __exit saa7146_vv_cleanup_module(void)
633{
634}
635
636module_init(saa7146_vv_init_module);
637module_exit(saa7146_vv_cleanup_module);
638
639MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
640MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
641MODULE_LICENSE("GPL");