1 /*
2 * STK1160 driver
3 *
4 * Copyright (C) 2012 Ezequiel Garcia
5 * <elezegarcia--a.t--gmail.com>
6 *
7 * Based on Easycap driver by R.M. Thomas
8 * Copyright (C) 2010 R.M. Thomas
9 * <rmthomas--a.t--sciolus.org>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 */
22
23 #include <linux/module.h>
24 #include <linux/usb.h>
25 #include <linux/mm.h>
26 #include <linux/slab.h>
27
28 #include <linux/videodev2.h>
29 #include <media/v4l2-device.h>
30 #include <media/v4l2-common.h>
31 #include <media/v4l2-ioctl.h>
32 #include <media/v4l2-fh.h>
33 #include <media/v4l2-event.h>
34 #include <media/videobuf2-vmalloc.h>
35
36 #include <media/saa7115.h>
37
38 #include "stk1160.h"
39 #include "stk1160-reg.h"
40
41 static bool keep_buffers;
42 module_param(keep_buffers, bool, 0644);
43 MODULE_PARM_DESC(keep_buffers, "don't release buffers upon stop streaming");
44
45 /* supported video standards */
46 static struct stk1160_fmt format[] = {
47 {
48 .name = "16 bpp YUY2, 4:2:2, packed",
49 .fourcc = V4L2_PIX_FMT_UYVY,
50 .depth = 16,
51 }
52 };
53
stk1160_set_std(struct stk1160 * dev)54 static void stk1160_set_std(struct stk1160 *dev)
55 {
56 int i;
57
58 static struct regval std525[] = {
59
60 /* 720x480 */
61
62 /* Frame start */
63 {STK116_CFSPO_STX_L, 0x0000},
64 {STK116_CFSPO_STX_H, 0x0000},
65 {STK116_CFSPO_STY_L, 0x0003},
66 {STK116_CFSPO_STY_H, 0x0000},
67
68 /* Frame end */
69 {STK116_CFEPO_ENX_L, 0x05a0},
70 {STK116_CFEPO_ENX_H, 0x0005},
71 {STK116_CFEPO_ENY_L, 0x00f3},
72 {STK116_CFEPO_ENY_H, 0x0000},
73
74 {0xffff, 0xffff}
75 };
76
77 static struct regval std625[] = {
78
79 /* 720x576 */
80
81 /* TODO: Each line of frame has some junk at the end */
82 /* Frame start */
83 {STK116_CFSPO, 0x0000},
84 {STK116_CFSPO+1, 0x0000},
85 {STK116_CFSPO+2, 0x0001},
86 {STK116_CFSPO+3, 0x0000},
87
88 /* Frame end */
89 {STK116_CFEPO, 0x05a0},
90 {STK116_CFEPO+1, 0x0005},
91 {STK116_CFEPO+2, 0x0121},
92 {STK116_CFEPO+3, 0x0001},
93
94 {0xffff, 0xffff}
95 };
96
97 if (dev->norm & V4L2_STD_525_60) {
98 stk1160_dbg("registers to NTSC like standard\n");
99 for (i = 0; std525[i].reg != 0xffff; i++)
100 stk1160_write_reg(dev, std525[i].reg, std525[i].val);
101 } else {
102 stk1160_dbg("registers to PAL like standard\n");
103 for (i = 0; std625[i].reg != 0xffff; i++)
104 stk1160_write_reg(dev, std625[i].reg, std625[i].val);
105 }
106
107 }
108
109 /*
110 * Set a new alternate setting.
111 * Returns true is dev->max_pkt_size has changed, false otherwise.
112 */
stk1160_set_alternate(struct stk1160 * dev)113 static bool stk1160_set_alternate(struct stk1160 *dev)
114 {
115 int i, prev_alt = dev->alt;
116 unsigned int min_pkt_size;
117 bool new_pkt_size;
118
119 /*
120 * If we don't set right alternate,
121 * then we will get a green screen with junk.
122 */
123 min_pkt_size = STK1160_MIN_PKT_SIZE;
124
125 for (i = 0; i < dev->num_alt; i++) {
126 /* stop when the selected alt setting offers enough bandwidth */
127 if (dev->alt_max_pkt_size[i] >= min_pkt_size) {
128 dev->alt = i;
129 break;
130 /*
131 * otherwise make sure that we end up with the maximum bandwidth
132 * because the min_pkt_size equation might be wrong...
133 */
134 } else if (dev->alt_max_pkt_size[i] >
135 dev->alt_max_pkt_size[dev->alt])
136 dev->alt = i;
137 }
138
139 stk1160_info("setting alternate %d\n", dev->alt);
140
141 if (dev->alt != prev_alt) {
142 stk1160_dbg("minimum isoc packet size: %u (alt=%d)\n",
143 min_pkt_size, dev->alt);
144 stk1160_dbg("setting alt %d with wMaxPacketSize=%u\n",
145 dev->alt, dev->alt_max_pkt_size[dev->alt]);
146 usb_set_interface(dev->udev, 0, dev->alt);
147 }
148
149 new_pkt_size = dev->max_pkt_size != dev->alt_max_pkt_size[dev->alt];
150 dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt];
151
152 return new_pkt_size;
153 }
154
stk1160_start_streaming(struct stk1160 * dev)155 static int stk1160_start_streaming(struct stk1160 *dev)
156 {
157 bool new_pkt_size;
158 int rc = 0;
159 int i;
160
161 /* Check device presence */
162 if (!dev->udev)
163 return -ENODEV;
164
165 if (mutex_lock_interruptible(&dev->v4l_lock))
166 return -ERESTARTSYS;
167 /*
168 * For some reason it is mandatory to set alternate *first*
169 * and only *then* initialize isoc urbs.
170 * Someone please explain me why ;)
171 */
172 new_pkt_size = stk1160_set_alternate(dev);
173
174 /*
175 * We (re)allocate isoc urbs if:
176 * there is no allocated isoc urbs, OR
177 * a new dev->max_pkt_size is detected
178 */
179 if (!dev->isoc_ctl.num_bufs || new_pkt_size) {
180 rc = stk1160_alloc_isoc(dev);
181 if (rc < 0)
182 goto out_stop_hw;
183 }
184
185 /* submit urbs and enables IRQ */
186 for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
187 rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_KERNEL);
188 if (rc) {
189 stk1160_err("cannot submit urb[%d] (%d)\n", i, rc);
190 goto out_uninit;
191 }
192 }
193
194 /* Start saa711x */
195 v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 1);
196
197 /* Start stk1160 */
198 stk1160_write_reg(dev, STK1160_DCTRL, 0xb3);
199 stk1160_write_reg(dev, STK1160_DCTRL+3, 0x00);
200
201 stk1160_dbg("streaming started\n");
202
203 mutex_unlock(&dev->v4l_lock);
204
205 return 0;
206
207 out_uninit:
208 stk1160_uninit_isoc(dev);
209 out_stop_hw:
210 usb_set_interface(dev->udev, 0, 0);
211 stk1160_clear_queue(dev);
212
213 mutex_unlock(&dev->v4l_lock);
214
215 return rc;
216 }
217
218 /* Must be called with v4l_lock hold */
stk1160_stop_hw(struct stk1160 * dev)219 static void stk1160_stop_hw(struct stk1160 *dev)
220 {
221 /* If the device is not physically present, there is nothing to do */
222 if (!dev->udev)
223 return;
224
225 /* set alternate 0 */
226 dev->alt = 0;
227 stk1160_info("setting alternate %d\n", dev->alt);
228 usb_set_interface(dev->udev, 0, 0);
229
230 /* Stop stk1160 */
231 stk1160_write_reg(dev, STK1160_DCTRL, 0x00);
232 stk1160_write_reg(dev, STK1160_DCTRL+3, 0x00);
233
234 /* Stop saa711x */
235 v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
236 }
237
stk1160_stop_streaming(struct stk1160 * dev)238 static int stk1160_stop_streaming(struct stk1160 *dev)
239 {
240 if (mutex_lock_interruptible(&dev->v4l_lock))
241 return -ERESTARTSYS;
242
243 /*
244 * Once URBs are cancelled, the URB complete handler
245 * won't be running. This is required to safely release the
246 * current buffer (dev->isoc_ctl.buf).
247 */
248 stk1160_cancel_isoc(dev);
249
250 /*
251 * It is possible to keep buffers around using a module parameter.
252 * This is intended to avoid memory fragmentation.
253 */
254 if (!keep_buffers)
255 stk1160_free_isoc(dev);
256
257 stk1160_stop_hw(dev);
258
259 stk1160_clear_queue(dev);
260
261 stk1160_dbg("streaming stopped\n");
262
263 mutex_unlock(&dev->v4l_lock);
264
265 return 0;
266 }
267
268 static struct v4l2_file_operations stk1160_fops = {
269 .owner = THIS_MODULE,
270 .open = v4l2_fh_open,
271 .release = vb2_fop_release,
272 .read = vb2_fop_read,
273 .poll = vb2_fop_poll,
274 .mmap = vb2_fop_mmap,
275 .unlocked_ioctl = video_ioctl2,
276 };
277
278 /*
279 * vidioc ioctls
280 */
vidioc_querycap(struct file * file,void * priv,struct v4l2_capability * cap)281 static int vidioc_querycap(struct file *file,
282 void *priv, struct v4l2_capability *cap)
283 {
284 struct stk1160 *dev = video_drvdata(file);
285
286 strcpy(cap->driver, "stk1160");
287 strcpy(cap->card, "stk1160");
288 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
289 cap->device_caps =
290 V4L2_CAP_VIDEO_CAPTURE |
291 V4L2_CAP_STREAMING |
292 V4L2_CAP_READWRITE;
293 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
294 return 0;
295 }
296
vidioc_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)297 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
298 struct v4l2_fmtdesc *f)
299 {
300 if (f->index != 0)
301 return -EINVAL;
302
303 strlcpy(f->description, format[f->index].name, sizeof(f->description));
304 f->pixelformat = format[f->index].fourcc;
305 return 0;
306 }
307
vidioc_g_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)308 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
309 struct v4l2_format *f)
310 {
311 struct stk1160 *dev = video_drvdata(file);
312
313 f->fmt.pix.width = dev->width;
314 f->fmt.pix.height = dev->height;
315 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
316 f->fmt.pix.pixelformat = dev->fmt->fourcc;
317 f->fmt.pix.bytesperline = dev->width * 2;
318 f->fmt.pix.sizeimage = dev->height * f->fmt.pix.bytesperline;
319 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
320
321 return 0;
322 }
323
vidioc_try_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)324 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
325 struct v4l2_format *f)
326 {
327 struct stk1160 *dev = video_drvdata(file);
328
329 /*
330 * User can't choose size at his own will,
331 * so we just return him the current size chosen
332 * at standard selection.
333 * TODO: Implement frame scaling?
334 */
335
336 f->fmt.pix.pixelformat = dev->fmt->fourcc;
337 f->fmt.pix.width = dev->width;
338 f->fmt.pix.height = dev->height;
339 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
340 f->fmt.pix.bytesperline = dev->width * 2;
341 f->fmt.pix.sizeimage = dev->height * f->fmt.pix.bytesperline;
342 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
343
344 return 0;
345 }
346
vidioc_s_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)347 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
348 struct v4l2_format *f)
349 {
350 struct stk1160 *dev = video_drvdata(file);
351 struct vb2_queue *q = &dev->vb_vidq;
352
353 if (vb2_is_busy(q))
354 return -EBUSY;
355
356 vidioc_try_fmt_vid_cap(file, priv, f);
357
358 /* We don't support any format changes */
359
360 return 0;
361 }
362
vidioc_querystd(struct file * file,void * priv,v4l2_std_id * norm)363 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
364 {
365 struct stk1160 *dev = video_drvdata(file);
366 v4l2_device_call_all(&dev->v4l2_dev, 0, video, querystd, norm);
367 return 0;
368 }
369
vidioc_g_std(struct file * file,void * priv,v4l2_std_id * norm)370 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
371 {
372 struct stk1160 *dev = video_drvdata(file);
373
374 *norm = dev->norm;
375 return 0;
376 }
377
vidioc_s_std(struct file * file,void * priv,v4l2_std_id norm)378 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
379 {
380 struct stk1160 *dev = video_drvdata(file);
381 struct vb2_queue *q = &dev->vb_vidq;
382
383 if (dev->norm == norm)
384 return 0;
385
386 if (vb2_is_busy(q))
387 return -EBUSY;
388
389 /* Check device presence */
390 if (!dev->udev)
391 return -ENODEV;
392
393 /* We need to set this now, before we call stk1160_set_std */
394 dev->norm = norm;
395
396 /* This is taken from saa7115 video decoder */
397 if (dev->norm & V4L2_STD_525_60) {
398 dev->width = 720;
399 dev->height = 480;
400 } else if (dev->norm & V4L2_STD_625_50) {
401 dev->width = 720;
402 dev->height = 576;
403 } else {
404 stk1160_err("invalid standard\n");
405 return -EINVAL;
406 }
407
408 stk1160_set_std(dev);
409
410 v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std,
411 dev->norm);
412
413 return 0;
414 }
415
416
vidioc_enum_input(struct file * file,void * priv,struct v4l2_input * i)417 static int vidioc_enum_input(struct file *file, void *priv,
418 struct v4l2_input *i)
419 {
420 struct stk1160 *dev = video_drvdata(file);
421
422 if (i->index > STK1160_MAX_INPUT)
423 return -EINVAL;
424
425 /* S-Video special handling */
426 if (i->index == STK1160_SVIDEO_INPUT)
427 sprintf(i->name, "S-Video");
428 else
429 sprintf(i->name, "Composite%d", i->index);
430
431 i->type = V4L2_INPUT_TYPE_CAMERA;
432 i->std = dev->vdev.tvnorms;
433 return 0;
434 }
435
vidioc_g_input(struct file * file,void * priv,unsigned int * i)436 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
437 {
438 struct stk1160 *dev = video_drvdata(file);
439 *i = dev->ctl_input;
440 return 0;
441 }
442
vidioc_s_input(struct file * file,void * priv,unsigned int i)443 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
444 {
445 struct stk1160 *dev = video_drvdata(file);
446
447 if (i > STK1160_MAX_INPUT)
448 return -EINVAL;
449
450 dev->ctl_input = i;
451
452 stk1160_select_input(dev);
453
454 return 0;
455 }
456
457 #ifdef CONFIG_VIDEO_ADV_DEBUG
vidioc_g_register(struct file * file,void * priv,struct v4l2_dbg_register * reg)458 static int vidioc_g_register(struct file *file, void *priv,
459 struct v4l2_dbg_register *reg)
460 {
461 struct stk1160 *dev = video_drvdata(file);
462 int rc;
463 u8 val;
464
465 /* Match host */
466 rc = stk1160_read_reg(dev, reg->reg, &val);
467 reg->val = val;
468 reg->size = 1;
469
470 return rc;
471 }
472
vidioc_s_register(struct file * file,void * priv,const struct v4l2_dbg_register * reg)473 static int vidioc_s_register(struct file *file, void *priv,
474 const struct v4l2_dbg_register *reg)
475 {
476 struct stk1160 *dev = video_drvdata(file);
477
478 /* Match host */
479 return stk1160_write_reg(dev, reg->reg, reg->val);
480 }
481 #endif
482
483 static const struct v4l2_ioctl_ops stk1160_ioctl_ops = {
484 .vidioc_querycap = vidioc_querycap,
485 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
486 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
487 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
488 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
489 .vidioc_querystd = vidioc_querystd,
490 .vidioc_g_std = vidioc_g_std,
491 .vidioc_s_std = vidioc_s_std,
492 .vidioc_enum_input = vidioc_enum_input,
493 .vidioc_g_input = vidioc_g_input,
494 .vidioc_s_input = vidioc_s_input,
495
496 /* vb2 takes care of these */
497 .vidioc_reqbufs = vb2_ioctl_reqbufs,
498 .vidioc_querybuf = vb2_ioctl_querybuf,
499 .vidioc_qbuf = vb2_ioctl_qbuf,
500 .vidioc_dqbuf = vb2_ioctl_dqbuf,
501 .vidioc_streamon = vb2_ioctl_streamon,
502 .vidioc_streamoff = vb2_ioctl_streamoff,
503
504 .vidioc_log_status = v4l2_ctrl_log_status,
505 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
506 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
507
508 #ifdef CONFIG_VIDEO_ADV_DEBUG
509 .vidioc_g_register = vidioc_g_register,
510 .vidioc_s_register = vidioc_s_register,
511 #endif
512 };
513
514 /********************************************************************/
515
516 /*
517 * Videobuf2 operations
518 */
queue_setup(struct vb2_queue * vq,const struct v4l2_format * v4l_fmt,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],void * alloc_ctxs[])519 static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *v4l_fmt,
520 unsigned int *nbuffers, unsigned int *nplanes,
521 unsigned int sizes[], void *alloc_ctxs[])
522 {
523 struct stk1160 *dev = vb2_get_drv_priv(vq);
524 unsigned long size;
525
526 size = dev->width * dev->height * 2;
527
528 /*
529 * Here we can change the number of buffers being requested.
530 * So, we set a minimum and a maximum like this:
531 */
532 *nbuffers = clamp_t(unsigned int, *nbuffers,
533 STK1160_MIN_VIDEO_BUFFERS, STK1160_MAX_VIDEO_BUFFERS);
534
535 /* This means a packed colorformat */
536 *nplanes = 1;
537
538 sizes[0] = size;
539
540 stk1160_info("%s: buffer count %d, each %ld bytes\n",
541 __func__, *nbuffers, size);
542
543 return 0;
544 }
545
buffer_queue(struct vb2_buffer * vb)546 static void buffer_queue(struct vb2_buffer *vb)
547 {
548 unsigned long flags;
549 struct stk1160 *dev = vb2_get_drv_priv(vb->vb2_queue);
550 struct stk1160_buffer *buf =
551 container_of(vb, struct stk1160_buffer, vb);
552
553 spin_lock_irqsave(&dev->buf_lock, flags);
554 if (!dev->udev) {
555 /*
556 * If the device is disconnected return the buffer to userspace
557 * directly. The next QBUF call will fail with -ENODEV.
558 */
559 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
560 } else {
561
562 buf->mem = vb2_plane_vaddr(vb, 0);
563 buf->length = vb2_plane_size(vb, 0);
564 buf->bytesused = 0;
565 buf->pos = 0;
566
567 /*
568 * If buffer length is less from expected then we return
569 * the buffer to userspace directly.
570 */
571 if (buf->length < dev->width * dev->height * 2)
572 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
573 else
574 list_add_tail(&buf->list, &dev->avail_bufs);
575
576 }
577 spin_unlock_irqrestore(&dev->buf_lock, flags);
578 }
579
start_streaming(struct vb2_queue * vq,unsigned int count)580 static int start_streaming(struct vb2_queue *vq, unsigned int count)
581 {
582 struct stk1160 *dev = vb2_get_drv_priv(vq);
583 return stk1160_start_streaming(dev);
584 }
585
586 /* abort streaming and wait for last buffer */
stop_streaming(struct vb2_queue * vq)587 static void stop_streaming(struct vb2_queue *vq)
588 {
589 struct stk1160 *dev = vb2_get_drv_priv(vq);
590 stk1160_stop_streaming(dev);
591 }
592
593 static struct vb2_ops stk1160_video_qops = {
594 .queue_setup = queue_setup,
595 .buf_queue = buffer_queue,
596 .start_streaming = start_streaming,
597 .stop_streaming = stop_streaming,
598 .wait_prepare = vb2_ops_wait_prepare,
599 .wait_finish = vb2_ops_wait_finish,
600 };
601
602 static struct video_device v4l_template = {
603 .name = "stk1160",
604 .tvnorms = V4L2_STD_525_60 | V4L2_STD_625_50,
605 .fops = &stk1160_fops,
606 .ioctl_ops = &stk1160_ioctl_ops,
607 .release = video_device_release_empty,
608 };
609
610 /********************************************************************/
611
612 /* Must be called with both v4l_lock and vb_queue_lock hold */
stk1160_clear_queue(struct stk1160 * dev)613 void stk1160_clear_queue(struct stk1160 *dev)
614 {
615 struct stk1160_buffer *buf;
616 unsigned long flags;
617
618 /* Release all active buffers */
619 spin_lock_irqsave(&dev->buf_lock, flags);
620 while (!list_empty(&dev->avail_bufs)) {
621 buf = list_first_entry(&dev->avail_bufs,
622 struct stk1160_buffer, list);
623 list_del(&buf->list);
624 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
625 stk1160_info("buffer [%p/%d] aborted\n",
626 buf, buf->vb.v4l2_buf.index);
627 }
628
629 /* It's important to release the current buffer */
630 if (dev->isoc_ctl.buf) {
631 buf = dev->isoc_ctl.buf;
632 dev->isoc_ctl.buf = NULL;
633
634 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
635 stk1160_info("buffer [%p/%d] aborted\n",
636 buf, buf->vb.v4l2_buf.index);
637 }
638 spin_unlock_irqrestore(&dev->buf_lock, flags);
639 }
640
stk1160_vb2_setup(struct stk1160 * dev)641 int stk1160_vb2_setup(struct stk1160 *dev)
642 {
643 int rc;
644 struct vb2_queue *q;
645
646 q = &dev->vb_vidq;
647 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
648 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR;
649 q->drv_priv = dev;
650 q->buf_struct_size = sizeof(struct stk1160_buffer);
651 q->ops = &stk1160_video_qops;
652 q->mem_ops = &vb2_vmalloc_memops;
653 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
654
655 rc = vb2_queue_init(q);
656 if (rc < 0)
657 return rc;
658
659 /* initialize video dma queue */
660 INIT_LIST_HEAD(&dev->avail_bufs);
661
662 return 0;
663 }
664
stk1160_video_register(struct stk1160 * dev)665 int stk1160_video_register(struct stk1160 *dev)
666 {
667 int rc;
668
669 /* Initialize video_device with a template structure */
670 dev->vdev = v4l_template;
671 dev->vdev.queue = &dev->vb_vidq;
672
673 /*
674 * Provide mutexes for v4l2 core and for videobuf2 queue.
675 * It will be used to protect *only* v4l2 ioctls.
676 */
677 dev->vdev.lock = &dev->v4l_lock;
678 dev->vdev.queue->lock = &dev->vb_queue_lock;
679
680 /* This will be used to set video_device parent */
681 dev->vdev.v4l2_dev = &dev->v4l2_dev;
682
683 /* NTSC is default */
684 dev->norm = V4L2_STD_NTSC_M;
685 dev->width = 720;
686 dev->height = 480;
687
688 /* set default format */
689 dev->fmt = &format[0];
690 stk1160_set_std(dev);
691
692 v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std,
693 dev->norm);
694
695 video_set_drvdata(&dev->vdev, dev);
696 rc = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
697 if (rc < 0) {
698 stk1160_err("video_register_device failed (%d)\n", rc);
699 return rc;
700 }
701
702 v4l2_info(&dev->v4l2_dev, "V4L2 device registered as %s\n",
703 video_device_node_name(&dev->vdev));
704
705 return 0;
706 }
707