projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
vfio/pci: Fix typos in comments
[deliverable/linux.git] / drivers / media / usb / hdpvr / hdpvr-video.c
1 /*
2 * Hauppauge HD PVR USB driver - video 4 linux 2 interface
3 *
4 * Copyright (C) 2008 Janne Grunau (j@jannau.net)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation, version 2.
9 *
10 */
11
12 #include <linux/kernel.h>
13 #include <linux/kconfig.h>
14 #include <linux/errno.h>
15 #include <linux/init.h>
16 #include <linux/slab.h>
17 #include <linux/module.h>
18 #include <linux/uaccess.h>
19 #include <linux/usb.h>
20 #include <linux/mutex.h>
21 #include <linux/workqueue.h>
22
23 #include <linux/videodev2.h>
24 #include <linux/v4l2-dv-timings.h>
25 #include <media/v4l2-dev.h>
26 #include <media/v4l2-common.h>
27 #include <media/v4l2-dv-timings.h>
28 #include <media/v4l2-ioctl.h>
29 #include <media/v4l2-event.h>
30 #include "hdpvr.h"
31
32 #define BULK_URB_TIMEOUT 90 /* 0.09 seconds */
33
34 #define print_buffer_status() { \
35 v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev, \
36 "%s:%d buffer stat: %d free, %d proc\n", \
37 __func__, __LINE__, \
38 list_size(&dev->free_buff_list), \
39 list_size(&dev->rec_buff_list)); }
40
41 static const struct v4l2_dv_timings hdpvr_dv_timings[] = {
42 V4L2_DV_BT_CEA_720X480I59_94,
43 V4L2_DV_BT_CEA_720X576I50,
44 V4L2_DV_BT_CEA_720X480P59_94,
45 V4L2_DV_BT_CEA_720X576P50,
46 V4L2_DV_BT_CEA_1280X720P50,
47 V4L2_DV_BT_CEA_1280X720P60,
48 V4L2_DV_BT_CEA_1920X1080I50,
49 V4L2_DV_BT_CEA_1920X1080I60,
50 };
51
52 /* Use 480i59 as the default timings */
53 #define HDPVR_DEF_DV_TIMINGS_IDX (0)
54
55 struct hdpvr_fh {
56 struct v4l2_fh fh;
57 bool legacy_mode;
58 };
59
60 static uint list_size(struct list_head *list)
61 {
62 struct list_head *tmp;
63 uint count = 0;
64
65 list_for_each(tmp, list) {
66 count++;
67 }
68
69 return count;
70 }
71
72 /*=========================================================================*/
73 /* urb callback */
74 static void hdpvr_read_bulk_callback(struct urb *urb)
75 {
76 struct hdpvr_buffer *buf = (struct hdpvr_buffer *)urb->context;
77 struct hdpvr_device *dev = buf->dev;
78
79 /* marking buffer as received and wake waiting */
80 buf->status = BUFSTAT_READY;
81 wake_up_interruptible(&dev->wait_data);
82 }
83
84 /*=========================================================================*/
85 /* buffer bits */
86
87 /* function expects dev->io_mutex to be hold by caller */
88 int hdpvr_cancel_queue(struct hdpvr_device *dev)
89 {
90 struct hdpvr_buffer *buf;
91
92 list_for_each_entry(buf, &dev->rec_buff_list, buff_list) {
93 usb_kill_urb(buf->urb);
94 buf->status = BUFSTAT_AVAILABLE;
95 }
96
97 list_splice_init(&dev->rec_buff_list, dev->free_buff_list.prev);
98
99 return 0;
100 }
101
102 static int hdpvr_free_queue(struct list_head *q)
103 {
104 struct list_head *tmp;
105 struct list_head *p;
106 struct hdpvr_buffer *buf;
107 struct urb *urb;
108
109 for (p = q->next; p != q;) {
110 buf = list_entry(p, struct hdpvr_buffer, buff_list);
111
112 urb = buf->urb;
113 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
114 urb->transfer_buffer, urb->transfer_dma);
115 usb_free_urb(urb);
116 tmp = p->next;
117 list_del(p);
118 kfree(buf);
119 p = tmp;
120 }
121
122 return 0;
123 }
124
125 /* function expects dev->io_mutex to be hold by caller */
126 int hdpvr_free_buffers(struct hdpvr_device *dev)
127 {
128 hdpvr_cancel_queue(dev);
129
130 hdpvr_free_queue(&dev->free_buff_list);
131 hdpvr_free_queue(&dev->rec_buff_list);
132
133 return 0;
134 }
135
136 /* function expects dev->io_mutex to be hold by caller */
137 int hdpvr_alloc_buffers(struct hdpvr_device *dev, uint count)
138 {
139 uint i;
140 int retval = -ENOMEM;
141 u8 *mem;
142 struct hdpvr_buffer *buf;
143 struct urb *urb;
144
145 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
146 "allocating %u buffers\n", count);
147
148 for (i = 0; i < count; i++) {
149
150 buf = kzalloc(sizeof(struct hdpvr_buffer), GFP_KERNEL);
151 if (!buf) {
152 v4l2_err(&dev->v4l2_dev, "cannot allocate buffer\n");
153 goto exit;
154 }
155 buf->dev = dev;
156
157 urb = usb_alloc_urb(0, GFP_KERNEL);
158 if (!urb) {
159 v4l2_err(&dev->v4l2_dev, "cannot allocate urb\n");
160 goto exit_urb;
161 }
162 buf->urb = urb;
163
164 mem = usb_alloc_coherent(dev->udev, dev->bulk_in_size, GFP_KERNEL,
165 &urb->transfer_dma);
166 if (!mem) {
167 v4l2_err(&dev->v4l2_dev,
168 "cannot allocate usb transfer buffer\n");
169 goto exit_urb_buffer;
170 }
171
172 usb_fill_bulk_urb(buf->urb, dev->udev,
173 usb_rcvbulkpipe(dev->udev,
174 dev->bulk_in_endpointAddr),
175 mem, dev->bulk_in_size,
176 hdpvr_read_bulk_callback, buf);
177
178 buf->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
179 buf->status = BUFSTAT_AVAILABLE;
180 list_add_tail(&buf->buff_list, &dev->free_buff_list);
181 }
182 return 0;
183 exit_urb_buffer:
184 usb_free_urb(urb);
185 exit_urb:
186 kfree(buf);
187 exit:
188 hdpvr_free_buffers(dev);
189 return retval;
190 }
191
192 static int hdpvr_submit_buffers(struct hdpvr_device *dev)
193 {
194 struct hdpvr_buffer *buf;
195 struct urb *urb;
196 int ret = 0, err_count = 0;
197
198 mutex_lock(&dev->io_mutex);
199
200 while (dev->status == STATUS_STREAMING &&
201 !list_empty(&dev->free_buff_list)) {
202
203 buf = list_entry(dev->free_buff_list.next, struct hdpvr_buffer,
204 buff_list);
205 if (buf->status != BUFSTAT_AVAILABLE) {
206 v4l2_err(&dev->v4l2_dev,
207 "buffer not marked as available\n");
208 ret = -EFAULT;
209 goto err;
210 }
211
212 urb = buf->urb;
213 urb->status = 0;
214 urb->actual_length = 0;
215 ret = usb_submit_urb(urb, GFP_KERNEL);
216 if (ret) {
217 v4l2_err(&dev->v4l2_dev,
218 "usb_submit_urb in %s returned %d\n",
219 __func__, ret);
220 if (++err_count > 2)
221 break;
222 continue;
223 }
224 buf->status = BUFSTAT_INPROGRESS;
225 list_move_tail(&buf->buff_list, &dev->rec_buff_list);
226 }
227 err:
228 print_buffer_status();
229 mutex_unlock(&dev->io_mutex);
230 return ret;
231 }
232
233 static struct hdpvr_buffer *hdpvr_get_next_buffer(struct hdpvr_device *dev)
234 {
235 struct hdpvr_buffer *buf;
236
237 mutex_lock(&dev->io_mutex);
238
239 if (list_empty(&dev->rec_buff_list)) {
240 mutex_unlock(&dev->io_mutex);
241 return NULL;
242 }
243
244 buf = list_entry(dev->rec_buff_list.next, struct hdpvr_buffer,
245 buff_list);
246 mutex_unlock(&dev->io_mutex);
247
248 return buf;
249 }
250
251 static void hdpvr_transmit_buffers(struct work_struct *work)
252 {
253 struct hdpvr_device *dev = container_of(work, struct hdpvr_device,
254 worker);
255
256 while (dev->status == STATUS_STREAMING) {
257
258 if (hdpvr_submit_buffers(dev)) {
259 v4l2_err(&dev->v4l2_dev, "couldn't submit buffers\n");
260 goto error;
261 }
262 if (wait_event_interruptible(dev->wait_buffer,
263 !list_empty(&dev->free_buff_list) ||
264 dev->status != STATUS_STREAMING))
265 goto error;
266 }
267
268 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
269 "transmit worker exited\n");
270 return;
271 error:
272 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
273 "transmit buffers errored\n");
274 dev->status = STATUS_ERROR;
275 }
276
277 /* function expects dev->io_mutex to be hold by caller */
278 static int hdpvr_start_streaming(struct hdpvr_device *dev)
279 {
280 int ret;
281 struct hdpvr_video_info vidinf;
282
283 if (dev->status == STATUS_STREAMING)
284 return 0;
285 if (dev->status != STATUS_IDLE)
286 return -EAGAIN;
287
288 ret = get_video_info(dev, &vidinf);
289 if (ret < 0)
290 return ret;
291
292 if (!vidinf.valid) {
293 msleep(250);
294 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
295 "no video signal at input %d\n", dev->options.video_input);
296 return -EAGAIN;
297 }
298
299 v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
300 "video signal: %dx%d@%dhz\n", vidinf.width,
301 vidinf.height, vidinf.fps);
302
303 /* start streaming 2 request */
304 ret = usb_control_msg(dev->udev,
305 usb_sndctrlpipe(dev->udev, 0),
306 0xb8, 0x38, 0x1, 0, NULL, 0, 8000);
307 v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
308 "encoder start control request returned %d\n", ret);
309 if (ret < 0)
310 return ret;
311
312 ret = hdpvr_config_call(dev, CTRL_START_STREAMING_VALUE, 0x00);
313 if (ret)
314 return ret;
315
316 dev->status = STATUS_STREAMING;
317
318 INIT_WORK(&dev->worker, hdpvr_transmit_buffers);
319 schedule_work(&dev->worker);
320
321 v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
322 "streaming started\n");
323
324 return 0;
325 }
326
327
328 /* function expects dev->io_mutex to be hold by caller */
329 static int hdpvr_stop_streaming(struct hdpvr_device *dev)
330 {
331 int actual_length;
332 uint c = 0;
333 u8 *buf;
334
335 if (dev->status == STATUS_IDLE)
336 return 0;
337 else if (dev->status != STATUS_STREAMING)
338 return -EAGAIN;
339
340 buf = kmalloc(dev->bulk_in_size, GFP_KERNEL);
341 if (!buf)
342 v4l2_err(&dev->v4l2_dev, "failed to allocate temporary buffer "
343 "for emptying the internal device buffer. "
344 "Next capture start will be slow\n");
345
346 dev->status = STATUS_SHUTTING_DOWN;
347 hdpvr_config_call(dev, CTRL_STOP_STREAMING_VALUE, 0x00);
348 mutex_unlock(&dev->io_mutex);
349
350 wake_up_interruptible(&dev->wait_buffer);
351 msleep(50);
352
353 flush_work(&dev->worker);
354
355 mutex_lock(&dev->io_mutex);
356 /* kill the still outstanding urbs */
357 hdpvr_cancel_queue(dev);
358
359 /* emptying the device buffer beforeshutting it down */
360 while (buf && ++c < 500 &&
361 !usb_bulk_msg(dev->udev,
362 usb_rcvbulkpipe(dev->udev,
363 dev->bulk_in_endpointAddr),
364 buf, dev->bulk_in_size, &actual_length,
365 BULK_URB_TIMEOUT)) {
366 v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
367 "%2d: got %d bytes\n", c, actual_length);
368 }
369 kfree(buf);
370 v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
371 "used %d urbs to empty device buffers\n", c-1);
372 msleep(10);
373
374 dev->status = STATUS_IDLE;
375
376 return 0;
377 }
378
379
380 /*=======================================================================*/
381 /*
382 * video 4 linux 2 file operations
383 */
384
385 static int hdpvr_open(struct file *file)
386 {
387 struct hdpvr_fh *fh = kzalloc(sizeof(*fh), GFP_KERNEL);
388
389 if (fh == NULL)
390 return -ENOMEM;
391 fh->legacy_mode = true;
392 v4l2_fh_init(&fh->fh, video_devdata(file));
393 v4l2_fh_add(&fh->fh);
394 file->private_data = fh;
395 return 0;
396 }
397
398 static int hdpvr_release(struct file *file)
399 {
400 struct hdpvr_device *dev = video_drvdata(file);
401
402 mutex_lock(&dev->io_mutex);
403 if (file->private_data == dev->owner) {
404 hdpvr_stop_streaming(dev);
405 dev->owner = NULL;
406 }
407 mutex_unlock(&dev->io_mutex);
408
409 return v4l2_fh_release(file);
410 }
411
412 /*
413 * hdpvr_v4l2_read()
414 * will allocate buffers when called for the first time
415 */
416 static ssize_t hdpvr_read(struct file *file, char __user *buffer, size_t count,
417 loff_t *pos)
418 {
419 struct hdpvr_device *dev = video_drvdata(file);
420 struct hdpvr_buffer *buf = NULL;
421 struct urb *urb;
422 unsigned int ret = 0;
423 int rem, cnt;
424
425 if (*pos)
426 return -ESPIPE;
427
428 mutex_lock(&dev->io_mutex);
429 if (dev->status == STATUS_IDLE) {
430 if (hdpvr_start_streaming(dev)) {
431 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
432 "start_streaming failed\n");
433 ret = -EIO;
434 msleep(200);
435 dev->status = STATUS_IDLE;
436 mutex_unlock(&dev->io_mutex);
437 goto err;
438 }
439 dev->owner = file->private_data;
440 print_buffer_status();
441 }
442 mutex_unlock(&dev->io_mutex);
443
444 /* wait for the first buffer */
445 if (!(file->f_flags & O_NONBLOCK)) {
446 if (wait_event_interruptible(dev->wait_data,
447 hdpvr_get_next_buffer(dev)))
448 return -ERESTARTSYS;
449 }
450
451 buf = hdpvr_get_next_buffer(dev);
452
453 while (count > 0 && buf) {
454
455 if (buf->status != BUFSTAT_READY &&
456 dev->status != STATUS_DISCONNECTED) {
457 /* return nonblocking */
458 if (file->f_flags & O_NONBLOCK) {
459 if (!ret)
460 ret = -EAGAIN;
461 goto err;
462 }
463
464 if (wait_event_interruptible(dev->wait_data,
465 buf->status == BUFSTAT_READY))
466 return -ERESTARTSYS;
467 }
468
469 if (buf->status != BUFSTAT_READY)
470 break;
471
472 /* set remaining bytes to copy */
473 urb = buf->urb;
474 rem = urb->actual_length - buf->pos;
475 cnt = rem > count ? count : rem;
476
477 if (copy_to_user(buffer, urb->transfer_buffer + buf->pos,
478 cnt)) {
479 v4l2_err(&dev->v4l2_dev, "read: copy_to_user failed\n");
480 if (!ret)
481 ret = -EFAULT;
482 goto err;
483 }
484
485 buf->pos += cnt;
486 count -= cnt;
487 buffer += cnt;
488 ret += cnt;
489
490 /* finished, take next buffer */
491 if (buf->pos == urb->actual_length) {
492 mutex_lock(&dev->io_mutex);
493 buf->pos = 0;
494 buf->status = BUFSTAT_AVAILABLE;
495
496 list_move_tail(&buf->buff_list, &dev->free_buff_list);
497
498 print_buffer_status();
499
500 mutex_unlock(&dev->io_mutex);
501
502 wake_up_interruptible(&dev->wait_buffer);
503
504 buf = hdpvr_get_next_buffer(dev);
505 }
506 }
507 err:
508 if (!ret && !buf)
509 ret = -EAGAIN;
510 return ret;
511 }
512
513 static unsigned int hdpvr_poll(struct file *filp, poll_table *wait)
514 {
515 unsigned long req_events = poll_requested_events(wait);
516 struct hdpvr_buffer *buf = NULL;
517 struct hdpvr_device *dev = video_drvdata(filp);
518 unsigned int mask = v4l2_ctrl_poll(filp, wait);
519
520 if (!(req_events & (POLLIN | POLLRDNORM)))
521 return mask;
522
523 mutex_lock(&dev->io_mutex);
524
525 if (dev->status == STATUS_IDLE) {
526 if (hdpvr_start_streaming(dev)) {
527 v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
528 "start_streaming failed\n");
529 dev->status = STATUS_IDLE;
530 } else {
531 dev->owner = filp->private_data;
532 }
533
534 print_buffer_status();
535 }
536 mutex_unlock(&dev->io_mutex);
537
538 buf = hdpvr_get_next_buffer(dev);
539 /* only wait if no data is available */
540 if (!buf || buf->status != BUFSTAT_READY) {
541 poll_wait(filp, &dev->wait_data, wait);
542 buf = hdpvr_get_next_buffer(dev);
543 }
544 if (buf && buf->status == BUFSTAT_READY)
545 mask |= POLLIN | POLLRDNORM;
546
547 return mask;
548 }
549
550
551 static const struct v4l2_file_operations hdpvr_fops = {
552 .owner = THIS_MODULE,
553 .open = hdpvr_open,
554 .release = hdpvr_release,
555 .read = hdpvr_read,
556 .poll = hdpvr_poll,
557 .unlocked_ioctl = video_ioctl2,
558 };
559
560 /*=======================================================================*/
561 /*
562 * V4L2 ioctl handling
563 */
564
565 static int vidioc_querycap(struct file *file, void *priv,
566 struct v4l2_capability *cap)
567 {
568 struct hdpvr_device *dev = video_drvdata(file);
569
570 strcpy(cap->driver, "hdpvr");
571 strcpy(cap->card, "Hauppauge HD PVR");
572 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
573 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_AUDIO |
574 V4L2_CAP_READWRITE;
575 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
576 return 0;
577 }
578
579 static int vidioc_s_std(struct file *file, void *_fh,
580 v4l2_std_id std)
581 {
582 struct hdpvr_device *dev = video_drvdata(file);
583 struct hdpvr_fh *fh = _fh;
584 u8 std_type = 1;
585
586 if (!fh->legacy_mode && dev->options.video_input == HDPVR_COMPONENT)
587 return -ENODATA;
588 if (dev->status != STATUS_IDLE)
589 return -EBUSY;
590 if (std & V4L2_STD_525_60)
591 std_type = 0;
592 dev->cur_std = std;
593 dev->width = 720;
594 dev->height = std_type ? 576 : 480;
595
596 return hdpvr_config_call(dev, CTRL_VIDEO_STD_TYPE, std_type);
597 }
598
599 static int vidioc_g_std(struct file *file, void *_fh,
600 v4l2_std_id *std)
601 {
602 struct hdpvr_device *dev = video_drvdata(file);
603 struct hdpvr_fh *fh = _fh;
604
605 if (!fh->legacy_mode && dev->options.video_input == HDPVR_COMPONENT)
606 return -ENODATA;
607 *std = dev->cur_std;
608 return 0;
609 }
610
611 static int vidioc_querystd(struct file *file, void *_fh, v4l2_std_id *a)
612 {
613 struct hdpvr_device *dev = video_drvdata(file);
614 struct hdpvr_video_info vid_info;
615 struct hdpvr_fh *fh = _fh;
616 int ret;
617
618 *a = V4L2_STD_UNKNOWN;
619 if (dev->options.video_input == HDPVR_COMPONENT)
620 return fh->legacy_mode ? 0 : -ENODATA;
621 ret = get_video_info(dev, &vid_info);
622 if (vid_info.valid && vid_info.width == 720 &&
623 (vid_info.height == 480 || vid_info.height == 576)) {
624 *a = (vid_info.height == 480) ?
625 V4L2_STD_525_60 : V4L2_STD_625_50;
626 }
627 return ret;
628 }
629
630 static int vidioc_s_dv_timings(struct file *file, void *_fh,
631 struct v4l2_dv_timings *timings)
632 {
633 struct hdpvr_device *dev = video_drvdata(file);
634 struct hdpvr_fh *fh = _fh;
635 int i;
636
637 fh->legacy_mode = false;
638 if (dev->options.video_input)
639 return -ENODATA;
640 if (dev->status != STATUS_IDLE)
641 return -EBUSY;
642 for (i = 0; i < ARRAY_SIZE(hdpvr_dv_timings); i++)
643 if (v4l2_match_dv_timings(timings, hdpvr_dv_timings + i, 0, false))
644 break;
645 if (i == ARRAY_SIZE(hdpvr_dv_timings))
646 return -EINVAL;
647 dev->cur_dv_timings = hdpvr_dv_timings[i];
648 dev->width = hdpvr_dv_timings[i].bt.width;
649 dev->height = hdpvr_dv_timings[i].bt.height;
650 return 0;
651 }
652
653 static int vidioc_g_dv_timings(struct file *file, void *_fh,
654 struct v4l2_dv_timings *timings)
655 {
656 struct hdpvr_device *dev = video_drvdata(file);
657 struct hdpvr_fh *fh = _fh;
658
659 fh->legacy_mode = false;
660 if (dev->options.video_input)
661 return -ENODATA;
662 *timings = dev->cur_dv_timings;
663 return 0;
664 }
665
666 static int vidioc_query_dv_timings(struct file *file, void *_fh,
667 struct v4l2_dv_timings *timings)
668 {
669 struct hdpvr_device *dev = video_drvdata(file);
670 struct hdpvr_fh *fh = _fh;
671 struct hdpvr_video_info vid_info;
672 bool interlaced;
673 int ret = 0;
674 int i;
675
676 fh->legacy_mode = false;
677 if (dev->options.video_input)
678 return -ENODATA;
679 ret = get_video_info(dev, &vid_info);
680 if (ret)
681 return ret;
682 if (!vid_info.valid)
683 return -ENOLCK;
684 interlaced = vid_info.fps <= 30;
685 for (i = 0; i < ARRAY_SIZE(hdpvr_dv_timings); i++) {
686 const struct v4l2_bt_timings *bt = &hdpvr_dv_timings[i].bt;
687 unsigned hsize;
688 unsigned vsize;
689 unsigned fps;
690
691 hsize = V4L2_DV_BT_FRAME_WIDTH(bt);
692 vsize = V4L2_DV_BT_FRAME_HEIGHT(bt);
693 fps = (unsigned)bt->pixelclock / (hsize * vsize);
694 if (bt->width != vid_info.width ||
695 bt->height != vid_info.height ||
696 bt->interlaced != interlaced ||
697 (fps != vid_info.fps && fps + 1 != vid_info.fps))
698 continue;
699 *timings = hdpvr_dv_timings[i];
700 break;
701 }
702 if (i == ARRAY_SIZE(hdpvr_dv_timings))
703 ret = -ERANGE;
704
705 return ret;
706 }
707
708 static int vidioc_enum_dv_timings(struct file *file, void *_fh,
709 struct v4l2_enum_dv_timings *timings)
710 {
711 struct hdpvr_device *dev = video_drvdata(file);
712 struct hdpvr_fh *fh = _fh;
713
714 fh->legacy_mode = false;
715 memset(timings->reserved, 0, sizeof(timings->reserved));
716 if (dev->options.video_input)
717 return -ENODATA;
718 if (timings->index >= ARRAY_SIZE(hdpvr_dv_timings))
719 return -EINVAL;
720 timings->timings = hdpvr_dv_timings[timings->index];
721 return 0;
722 }
723
724 static int vidioc_dv_timings_cap(struct file *file, void *_fh,
725 struct v4l2_dv_timings_cap *cap)
726 {
727 struct hdpvr_device *dev = video_drvdata(file);
728 struct hdpvr_fh *fh = _fh;
729
730 fh->legacy_mode = false;
731 if (dev->options.video_input)
732 return -ENODATA;
733 cap->type = V4L2_DV_BT_656_1120;
734 cap->bt.min_width = 720;
735 cap->bt.max_width = 1920;
736 cap->bt.min_height = 480;
737 cap->bt.max_height = 1080;
738 cap->bt.min_pixelclock = 27000000;
739 cap->bt.max_pixelclock = 74250000;
740 cap->bt.standards = V4L2_DV_BT_STD_CEA861;
741 cap->bt.capabilities = V4L2_DV_BT_CAP_INTERLACED | V4L2_DV_BT_CAP_PROGRESSIVE;
742 return 0;
743 }
744
745 static const char *iname[] = {
746 [HDPVR_COMPONENT] = "Component",
747 [HDPVR_SVIDEO] = "S-Video",
748 [HDPVR_COMPOSITE] = "Composite",
749 };
750
751 static int vidioc_enum_input(struct file *file, void *_fh, struct v4l2_input *i)
752 {
753 unsigned int n;
754
755 n = i->index;
756 if (n >= HDPVR_VIDEO_INPUTS)
757 return -EINVAL;
758
759 i->type = V4L2_INPUT_TYPE_CAMERA;
760
761 strncpy(i->name, iname[n], sizeof(i->name) - 1);
762 i->name[sizeof(i->name) - 1] = '\0';
763
764 i->audioset = 1<<HDPVR_RCA_FRONT | 1<<HDPVR_RCA_BACK | 1<<HDPVR_SPDIF;
765
766 i->capabilities = n ? V4L2_IN_CAP_STD : V4L2_IN_CAP_DV_TIMINGS;
767 i->std = n ? V4L2_STD_ALL : 0;
768
769 return 0;
770 }
771
772 static int vidioc_s_input(struct file *file, void *_fh,
773 unsigned int index)
774 {
775 struct hdpvr_device *dev = video_drvdata(file);
776 int retval;
777
778 if (index >= HDPVR_VIDEO_INPUTS)
779 return -EINVAL;
780
781 if (dev->status != STATUS_IDLE)
782 return -EBUSY;
783
784 retval = hdpvr_config_call(dev, CTRL_VIDEO_INPUT_VALUE, index+1);
785 if (!retval) {
786 dev->options.video_input = index;
787 /*
788 * Unfortunately gstreamer calls ENUMSTD and bails out if it
789 * won't find any formats, even though component input is
790 * selected. This means that we have to leave tvnorms at
791 * V4L2_STD_ALL. We cannot use the 'legacy' trick since
792 * tvnorms is set at the device node level and not at the
793 * filehandle level.
794 *
795 * Comment this out for now, but if the legacy mode can be
796 * removed in the future, then this code should be enabled
797 * again.
798 dev->video_dev.tvnorms =
799 (index != HDPVR_COMPONENT) ? V4L2_STD_ALL : 0;
800 */
801 }
802
803 return retval;
804 }
805
806 static int vidioc_g_input(struct file *file, void *private_data,
807 unsigned int *index)
808 {
809 struct hdpvr_device *dev = video_drvdata(file);
810
811 *index = dev->options.video_input;
812 return 0;
813 }
814
815
816 static const char *audio_iname[] = {
817 [HDPVR_RCA_FRONT] = "RCA front",
818 [HDPVR_RCA_BACK] = "RCA back",
819 [HDPVR_SPDIF] = "SPDIF",
820 };
821
822 static int vidioc_enumaudio(struct file *file, void *priv,
823 struct v4l2_audio *audio)
824 {
825 unsigned int n;
826
827 n = audio->index;
828 if (n >= HDPVR_AUDIO_INPUTS)
829 return -EINVAL;
830
831 audio->capability = V4L2_AUDCAP_STEREO;
832
833 strncpy(audio->name, audio_iname[n], sizeof(audio->name) - 1);
834 audio->name[sizeof(audio->name) - 1] = '\0';
835
836 return 0;
837 }
838
839 static int vidioc_s_audio(struct file *file, void *private_data,
840 const struct v4l2_audio *audio)
841 {
842 struct hdpvr_device *dev = video_drvdata(file);
843 int retval;
844
845 if (audio->index >= HDPVR_AUDIO_INPUTS)
846 return -EINVAL;
847
848 if (dev->status != STATUS_IDLE)
849 return -EBUSY;
850
851 retval = hdpvr_set_audio(dev, audio->index+1, dev->options.audio_codec);
852 if (!retval)
853 dev->options.audio_input = audio->index;
854
855 return retval;
856 }
857
858 static int vidioc_g_audio(struct file *file, void *private_data,
859 struct v4l2_audio *audio)
860 {
861 struct hdpvr_device *dev = video_drvdata(file);
862
863 audio->index = dev->options.audio_input;
864 audio->capability = V4L2_AUDCAP_STEREO;
865 strncpy(audio->name, audio_iname[audio->index], sizeof(audio->name));
866 audio->name[sizeof(audio->name) - 1] = '\0';
867 return 0;
868 }
869
870 static int hdpvr_try_ctrl(struct v4l2_ctrl *ctrl)
871 {
872 struct hdpvr_device *dev =
873 container_of(ctrl->handler, struct hdpvr_device, hdl);
874
875 switch (ctrl->id) {
876 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
877 if (ctrl->val == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR &&
878 dev->video_bitrate->val >= dev->video_bitrate_peak->val)
879 dev->video_bitrate_peak->val =
880 dev->video_bitrate->val + 100000;
881 break;
882 }
883 return 0;
884 }
885
886 static int hdpvr_s_ctrl(struct v4l2_ctrl *ctrl)
887 {
888 struct hdpvr_device *dev =
889 container_of(ctrl->handler, struct hdpvr_device, hdl);
890 struct hdpvr_options *opt = &dev->options;
891 int ret = -EINVAL;
892
893 switch (ctrl->id) {
894 case V4L2_CID_BRIGHTNESS:
895 ret = hdpvr_config_call(dev, CTRL_BRIGHTNESS, ctrl->val);
896 if (ret)
897 break;
898 dev->options.brightness = ctrl->val;
899 return 0;
900 case V4L2_CID_CONTRAST:
901 ret = hdpvr_config_call(dev, CTRL_CONTRAST, ctrl->val);
902 if (ret)
903 break;
904 dev->options.contrast = ctrl->val;
905 return 0;
906 case V4L2_CID_SATURATION:
907 ret = hdpvr_config_call(dev, CTRL_SATURATION, ctrl->val);
908 if (ret)
909 break;
910 dev->options.saturation = ctrl->val;
911 return 0;
912 case V4L2_CID_HUE:
913 ret = hdpvr_config_call(dev, CTRL_HUE, ctrl->val);
914 if (ret)
915 break;
916 dev->options.hue = ctrl->val;
917 return 0;
918 case V4L2_CID_SHARPNESS:
919 ret = hdpvr_config_call(dev, CTRL_SHARPNESS, ctrl->val);
920 if (ret)
921 break;
922 dev->options.sharpness = ctrl->val;
923 return 0;
924 case V4L2_CID_MPEG_AUDIO_ENCODING:
925 if (dev->flags & HDPVR_FLAG_AC3_CAP) {
926 opt->audio_codec = ctrl->val;
927 return hdpvr_set_audio(dev, opt->audio_input + 1,
928 opt->audio_codec);
929 }
930 return 0;
931 case V4L2_CID_MPEG_VIDEO_ENCODING:
932 return 0;
933 /* case V4L2_CID_MPEG_VIDEO_B_FRAMES: */
934 /* if (ctrl->value == 0 && !(opt->gop_mode & 0x2)) { */
935 /* opt->gop_mode |= 0x2; */
936 /* hdpvr_config_call(dev, CTRL_GOP_MODE_VALUE, */
937 /* opt->gop_mode); */
938 /* } */
939 /* if (ctrl->value == 128 && opt->gop_mode & 0x2) { */
940 /* opt->gop_mode &= ~0x2; */
941 /* hdpvr_config_call(dev, CTRL_GOP_MODE_VALUE, */
942 /* opt->gop_mode); */
943 /* } */
944 /* break; */
945 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: {
946 uint peak_bitrate = dev->video_bitrate_peak->val / 100000;
947 uint bitrate = dev->video_bitrate->val / 100000;
948
949 if (ctrl->is_new) {
950 if (ctrl->val == V4L2_MPEG_VIDEO_BITRATE_MODE_CBR)
951 opt->bitrate_mode = HDPVR_CONSTANT;
952 else
953 opt->bitrate_mode = HDPVR_VARIABLE_AVERAGE;
954 hdpvr_config_call(dev, CTRL_BITRATE_MODE_VALUE,
955 opt->bitrate_mode);
956 v4l2_ctrl_activate(dev->video_bitrate_peak,
957 ctrl->val != V4L2_MPEG_VIDEO_BITRATE_MODE_CBR);
958 }
959
960 if (dev->video_bitrate_peak->is_new ||
961 dev->video_bitrate->is_new) {
962 opt->bitrate = bitrate;
963 opt->peak_bitrate = peak_bitrate;
964 hdpvr_set_bitrate(dev);
965 }
966 return 0;
967 }
968 case V4L2_CID_MPEG_STREAM_TYPE:
969 return 0;
970 default:
971 break;
972 }
973 return ret;
974 }
975
976 static int vidioc_enum_fmt_vid_cap(struct file *file, void *private_data,
977 struct v4l2_fmtdesc *f)
978 {
979 if (f->index != 0)
980 return -EINVAL;
981
982 f->flags = V4L2_FMT_FLAG_COMPRESSED;
983 strncpy(f->description, "MPEG2-TS with AVC/AAC streams", 32);
984 f->pixelformat = V4L2_PIX_FMT_MPEG;
985
986 return 0;
987 }
988
989 static int vidioc_g_fmt_vid_cap(struct file *file, void *_fh,
990 struct v4l2_format *f)
991 {
992 struct hdpvr_device *dev = video_drvdata(file);
993 struct hdpvr_fh *fh = _fh;
994 int ret;
995
996 /*
997 * The original driver would always returns the current detected
998 * resolution as the format (and EFAULT if it couldn't be detected).
999 * With the introduction of VIDIOC_QUERY_DV_TIMINGS there is now a
1000 * better way of doing this, but to stay compatible with existing
1001 * applications we assume legacy mode every time an application opens
1002 * the device. Only if one of the new DV_TIMINGS ioctls is called
1003 * will the filehandle go into 'normal' mode where g_fmt returns the
1004 * last set format.
1005 */
1006 if (fh->legacy_mode) {
1007 struct hdpvr_video_info vid_info;
1008
1009 ret = get_video_info(dev, &vid_info);
1010 if (ret < 0)
1011 return ret;
1012 if (!vid_info.valid)
1013 return -EFAULT;
1014 f->fmt.pix.width = vid_info.width;
1015 f->fmt.pix.height = vid_info.height;
1016 } else {
1017 f->fmt.pix.width = dev->width;
1018 f->fmt.pix.height = dev->height;
1019 }
1020 f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG;
1021 f->fmt.pix.sizeimage = dev->bulk_in_size;
1022 f->fmt.pix.bytesperline = 0;
1023 if (f->fmt.pix.width == 720) {
1024 /* SDTV formats */
1025 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1026 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
1027 } else {
1028 /* HDTV formats */
1029 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
1030 f->fmt.pix.field = V4L2_FIELD_NONE;
1031 }
1032 return 0;
1033 }
1034
1035 static int vidioc_encoder_cmd(struct file *filp, void *priv,
1036 struct v4l2_encoder_cmd *a)
1037 {
1038 struct hdpvr_device *dev = video_drvdata(filp);
1039 int res = 0;
1040
1041 mutex_lock(&dev->io_mutex);
1042 a->flags = 0;
1043
1044 switch (a->cmd) {
1045 case V4L2_ENC_CMD_START:
1046 if (dev->owner && filp->private_data != dev->owner) {
1047 res = -EBUSY;
1048 break;
1049 }
1050 if (dev->status == STATUS_STREAMING)
1051 break;
1052 res = hdpvr_start_streaming(dev);
1053 if (!res)
1054 dev->owner = filp->private_data;
1055 else
1056 dev->status = STATUS_IDLE;
1057 break;
1058 case V4L2_ENC_CMD_STOP:
1059 if (dev->owner && filp->private_data != dev->owner) {
1060 res = -EBUSY;
1061 break;
1062 }
1063 if (dev->status == STATUS_IDLE)
1064 break;
1065 res = hdpvr_stop_streaming(dev);
1066 if (!res)
1067 dev->owner = NULL;
1068 break;
1069 default:
1070 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
1071 "Unsupported encoder cmd %d\n", a->cmd);
1072 res = -EINVAL;
1073 break;
1074 }
1075
1076 mutex_unlock(&dev->io_mutex);
1077 return res;
1078 }
1079
1080 static int vidioc_try_encoder_cmd(struct file *filp, void *priv,
1081 struct v4l2_encoder_cmd *a)
1082 {
1083 a->flags = 0;
1084 switch (a->cmd) {
1085 case V4L2_ENC_CMD_START:
1086 case V4L2_ENC_CMD_STOP:
1087 return 0;
1088 default:
1089 return -EINVAL;
1090 }
1091 }
1092
1093 static const struct v4l2_ioctl_ops hdpvr_ioctl_ops = {
1094 .vidioc_querycap = vidioc_querycap,
1095 .vidioc_s_std = vidioc_s_std,
1096 .vidioc_g_std = vidioc_g_std,
1097 .vidioc_querystd = vidioc_querystd,
1098 .vidioc_s_dv_timings = vidioc_s_dv_timings,
1099 .vidioc_g_dv_timings = vidioc_g_dv_timings,
1100 .vidioc_query_dv_timings= vidioc_query_dv_timings,
1101 .vidioc_enum_dv_timings = vidioc_enum_dv_timings,
1102 .vidioc_dv_timings_cap = vidioc_dv_timings_cap,
1103 .vidioc_enum_input = vidioc_enum_input,
1104 .vidioc_g_input = vidioc_g_input,
1105 .vidioc_s_input = vidioc_s_input,
1106 .vidioc_enumaudio = vidioc_enumaudio,
1107 .vidioc_g_audio = vidioc_g_audio,
1108 .vidioc_s_audio = vidioc_s_audio,
1109 .vidioc_enum_fmt_vid_cap= vidioc_enum_fmt_vid_cap,
1110 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1111 .vidioc_s_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1112 .vidioc_try_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1113 .vidioc_encoder_cmd = vidioc_encoder_cmd,
1114 .vidioc_try_encoder_cmd = vidioc_try_encoder_cmd,
1115 .vidioc_log_status = v4l2_ctrl_log_status,
1116 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1117 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1118 };
1119
1120 static void hdpvr_device_release(struct video_device *vdev)
1121 {
1122 struct hdpvr_device *dev = video_get_drvdata(vdev);
1123
1124 hdpvr_delete(dev);
1125 mutex_lock(&dev->io_mutex);
1126 flush_work(&dev->worker);
1127 mutex_unlock(&dev->io_mutex);
1128
1129 v4l2_device_unregister(&dev->v4l2_dev);
1130 v4l2_ctrl_handler_free(&dev->hdl);
1131
1132 /* deregister I2C adapter */
1133 #if IS_ENABLED(CONFIG_I2C)
1134 mutex_lock(&dev->i2c_mutex);
1135 i2c_del_adapter(&dev->i2c_adapter);
1136 mutex_unlock(&dev->i2c_mutex);
1137 #endif /* CONFIG_I2C */
1138
1139 kfree(dev->usbc_buf);
1140 kfree(dev);
1141 }
1142
1143 static const struct video_device hdpvr_video_template = {
1144 .fops = &hdpvr_fops,
1145 .release = hdpvr_device_release,
1146 .ioctl_ops = &hdpvr_ioctl_ops,
1147 .tvnorms = V4L2_STD_ALL,
1148 };
1149
1150 static const struct v4l2_ctrl_ops hdpvr_ctrl_ops = {
1151 .try_ctrl = hdpvr_try_ctrl,
1152 .s_ctrl = hdpvr_s_ctrl,
1153 };
1154
1155 int hdpvr_register_videodev(struct hdpvr_device *dev, struct device *parent,
1156 int devnum)
1157 {
1158 struct v4l2_ctrl_handler *hdl = &dev->hdl;
1159 bool ac3 = dev->flags & HDPVR_FLAG_AC3_CAP;
1160 int res;
1161
1162 dev->cur_std = V4L2_STD_525_60;
1163 dev->width = 720;
1164 dev->height = 480;
1165 dev->cur_dv_timings = hdpvr_dv_timings[HDPVR_DEF_DV_TIMINGS_IDX];
1166 v4l2_ctrl_handler_init(hdl, 11);
1167 if (dev->fw_ver > 0x15) {
1168 v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
1169 V4L2_CID_BRIGHTNESS, 0x0, 0xff, 1, 0x80);
1170 v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
1171 V4L2_CID_CONTRAST, 0x0, 0xff, 1, 0x40);
1172 v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
1173 V4L2_CID_SATURATION, 0x0, 0xff, 1, 0x40);
1174 v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
1175 V4L2_CID_HUE, 0x0, 0x1e, 1, 0xf);
1176 v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
1177 V4L2_CID_SHARPNESS, 0x0, 0xff, 1, 0x80);
1178 } else {
1179 v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
1180 V4L2_CID_BRIGHTNESS, 0x0, 0xff, 1, 0x86);
1181 v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
1182 V4L2_CID_CONTRAST, 0x0, 0xff, 1, 0x80);
1183 v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
1184 V4L2_CID_SATURATION, 0x0, 0xff, 1, 0x80);
1185 v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
1186 V4L2_CID_HUE, 0x0, 0xff, 1, 0x80);
1187 v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
1188 V4L2_CID_SHARPNESS, 0x0, 0xff, 1, 0x80);
1189 }
1190
1191 v4l2_ctrl_new_std_menu(hdl, &hdpvr_ctrl_ops,
1192 V4L2_CID_MPEG_STREAM_TYPE,
1193 V4L2_MPEG_STREAM_TYPE_MPEG2_TS,
1194 0x1, V4L2_MPEG_STREAM_TYPE_MPEG2_TS);
1195 v4l2_ctrl_new_std_menu(hdl, &hdpvr_ctrl_ops,
1196 V4L2_CID_MPEG_AUDIO_ENCODING,
1197 ac3 ? V4L2_MPEG_AUDIO_ENCODING_AC3 : V4L2_MPEG_AUDIO_ENCODING_AAC,
1198 0x7, ac3 ? dev->options.audio_codec : V4L2_MPEG_AUDIO_ENCODING_AAC);
1199 v4l2_ctrl_new_std_menu(hdl, &hdpvr_ctrl_ops,
1200 V4L2_CID_MPEG_VIDEO_ENCODING,
1201 V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC, 0x3,
1202 V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC);
1203
1204 dev->video_mode = v4l2_ctrl_new_std_menu(hdl, &hdpvr_ctrl_ops,
1205 V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
1206 V4L2_MPEG_VIDEO_BITRATE_MODE_CBR, 0,
1207 V4L2_MPEG_VIDEO_BITRATE_MODE_CBR);
1208
1209 dev->video_bitrate = v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
1210 V4L2_CID_MPEG_VIDEO_BITRATE,
1211 1000000, 13500000, 100000, 6500000);
1212 dev->video_bitrate_peak = v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
1213 V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
1214 1100000, 20200000, 100000, 9000000);
1215 dev->v4l2_dev.ctrl_handler = hdl;
1216 if (hdl->error) {
1217 res = hdl->error;
1218 v4l2_err(&dev->v4l2_dev, "Could not register controls\n");
1219 goto error;
1220 }
1221 v4l2_ctrl_cluster(3, &dev->video_mode);
1222 res = v4l2_ctrl_handler_setup(hdl);
1223 if (res < 0) {
1224 v4l2_err(&dev->v4l2_dev, "Could not setup controls\n");
1225 goto error;
1226 }
1227
1228 /* setup and register video device */
1229 dev->video_dev = hdpvr_video_template;
1230 strcpy(dev->video_dev.name, "Hauppauge HD PVR");
1231 dev->video_dev.v4l2_dev = &dev->v4l2_dev;
1232 video_set_drvdata(&dev->video_dev, dev);
1233
1234 res = video_register_device(&dev->video_dev, VFL_TYPE_GRABBER, devnum);
1235 if (res < 0) {
1236 v4l2_err(&dev->v4l2_dev, "video_device registration failed\n");
1237 goto error;
1238 }
1239
1240 return 0;
1241 error:
1242 v4l2_ctrl_handler_free(hdl);
1243 return res;
1244 }
Linux kernel - Deliverables
This page took 0.096646 seconds and 5 git commands to generate.