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[media] stk1160: Add support for S-Video input
[deliverable/linux.git] / drivers / media / usb / stk1160 / stk1160-v4l.c
CommitLineData
9cb2173e
EG		 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/v4l2-chip-ident.h>
35#include <media/videobuf2-vmalloc.h>
36
37#include <media/saa7115.h>
38
39#include "stk1160.h"
40#include "stk1160-reg.h"
41
42static unsigned int vidioc_debug;
43module_param(vidioc_debug, int, 0644);
44MODULE_PARM_DESC(vidioc_debug, "enable debug messages [vidioc]");
45
46static bool keep_buffers;
47module_param(keep_buffers, bool, 0644);
48MODULE_PARM_DESC(keep_buffers, "don't release buffers upon stop streaming");
49
50/* supported video standards */
51static struct stk1160_fmt format[] = {
52 {
53 .name = "16 bpp YUY2, 4:2:2, packed",
54 .fourcc = V4L2_PIX_FMT_UYVY,
55 .depth = 16,
56 }
57};
58
59static void stk1160_set_std(struct stk1160 *dev)
60{
61 int i;
62
63 static struct regval std525[] = {
64
65 /* 720x480 */
66
67 /* Frame start */
68 {STK116_CFSPO_STX_L, 0x0000},
69 {STK116_CFSPO_STX_H, 0x0000},
70 {STK116_CFSPO_STY_L, 0x0003},
71 {STK116_CFSPO_STY_H, 0x0000},
72
73 /* Frame end */
74 {STK116_CFEPO_ENX_L, 0x05a0},
75 {STK116_CFEPO_ENX_H, 0x0005},
76 {STK116_CFEPO_ENY_L, 0x00f3},
77 {STK116_CFEPO_ENY_H, 0x0000},
78
79 {0xffff, 0xffff}
80 };
81
82 static struct regval std625[] = {
83
84 /* 720x576 */
85
86 /* TODO: Each line of frame has some junk at the end */
87 /* Frame start */
88 {STK116_CFSPO, 0x0000},
89 {STK116_CFSPO+1, 0x0000},
90 {STK116_CFSPO+2, 0x0001},
91 {STK116_CFSPO+3, 0x0000},
92
93 /* Frame end */
94 {STK116_CFEPO, 0x05a0},
95 {STK116_CFEPO+1, 0x0005},
96 {STK116_CFEPO+2, 0x0121},
97 {STK116_CFEPO+3, 0x0001},
98
99 {0xffff, 0xffff}
100 };
101
102 if (dev->norm & V4L2_STD_525_60) {
103 stk1160_dbg("registers to NTSC like standard\n");
104 for (i = 0; std525[i].reg != 0xffff; i++)
105 stk1160_write_reg(dev, std525[i].reg, std525[i].val);
106 } else {
107 stk1160_dbg("registers to PAL like standard\n");
108 for (i = 0; std625[i].reg != 0xffff; i++)
109 stk1160_write_reg(dev, std625[i].reg, std625[i].val);
110 }
111
112}
113
114/*
115 * Set a new alternate setting.
116 * Returns true is dev->max_pkt_size has changed, false otherwise.
117 */
118static bool stk1160_set_alternate(struct stk1160 *dev)
119{
120 int i, prev_alt = dev->alt;
121 unsigned int min_pkt_size;
122 bool new_pkt_size;
123
124 /*
125 * If we don't set right alternate,
126 * then we will get a green screen with junk.
127 */
128 min_pkt_size = STK1160_MIN_PKT_SIZE;
129
130 for (i = 0; i < dev->num_alt; i++) {
131 /* stop when the selected alt setting offers enough bandwidth */
132 if (dev->alt_max_pkt_size[i] >= min_pkt_size) {
133 dev->alt = i;
134 break;
135 /*
136 * otherwise make sure that we end up with the maximum bandwidth
137 * because the min_pkt_size equation might be wrong...
138 */
139 } else if (dev->alt_max_pkt_size[i] >
140 dev->alt_max_pkt_size[dev->alt])
141 dev->alt = i;
142 }
143
144 stk1160_info("setting alternate %d\n", dev->alt);
145
146 if (dev->alt != prev_alt) {
147 stk1160_dbg("minimum isoc packet size: %u (alt=%d)\n",
148 min_pkt_size, dev->alt);
149 stk1160_dbg("setting alt %d with wMaxPacketSize=%u\n",
150 dev->alt, dev->alt_max_pkt_size[dev->alt]);
151 usb_set_interface(dev->udev, 0, dev->alt);
152 }
153
154 new_pkt_size = dev->max_pkt_size != dev->alt_max_pkt_size[dev->alt];
155 dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt];
156
157 return new_pkt_size;
158}
159
160static int stk1160_start_streaming(struct stk1160 *dev)
161{
9cb2173e 162 bool new_pkt_size;
f367cc1e
DC		 163 int rc = 0;
164 int i;
9cb2173e
EG		 165
166 /* Check device presence */
167 if (!dev->udev)
168 return -ENODEV;
169
170 if (mutex_lock_interruptible(&dev->v4l_lock))
171 return -ERESTARTSYS;
172 /*
173 * For some reason it is mandatory to set alternate *first*
174 * and only *then* initialize isoc urbs.
175 * Someone please explain me why ;)
176 */
177 new_pkt_size = stk1160_set_alternate(dev);
178
179 /*
180 * We (re)allocate isoc urbs if:
181 * there is no allocated isoc urbs, OR
182 * a new dev->max_pkt_size is detected
183 */
184 if (!dev->isoc_ctl.num_bufs || new_pkt_size) {
185 rc = stk1160_alloc_isoc(dev);
186 if (rc < 0)
8ac45649 187 goto out_stop_hw;
9cb2173e
EG		 188 }
189
190 /* submit urbs and enables IRQ */
191 for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
192 rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_KERNEL);
193 if (rc) {
194 stk1160_err("cannot submit urb[%d] (%d)\n", i, rc);
8ac45649 195 goto out_uninit;
9cb2173e
EG		 196 }
197 }
198
199 /* Start saa711x */
200 v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 1);
201
202 /* Start stk1160 */
203 stk1160_write_reg(dev, STK1160_DCTRL, 0xb3);
204 stk1160_write_reg(dev, STK1160_DCTRL+3, 0x00);
205
206 stk1160_dbg("streaming started\n");
207
8ac45649
EG		 208 mutex_unlock(&dev->v4l_lock);
209
210 return 0;
211
212out_uninit:
213 stk1160_uninit_isoc(dev);
214out_stop_hw:
215 usb_set_interface(dev->udev, 0, 0);
216 stk1160_clear_queue(dev);
217
9cb2173e
EG		 218 mutex_unlock(&dev->v4l_lock);
219
f367cc1e 220 return rc;
9cb2173e
EG		 221}
222
223/* Must be called with v4l_lock hold */
224static void stk1160_stop_hw(struct stk1160 *dev)
225{
226 /* If the device is not physically present, there is nothing to do */
227 if (!dev->udev)
228 return;
229
230 /* set alternate 0 */
231 dev->alt = 0;
232 stk1160_info("setting alternate %d\n", dev->alt);
233 usb_set_interface(dev->udev, 0, 0);
234
235 /* Stop stk1160 */
236 stk1160_write_reg(dev, STK1160_DCTRL, 0x00);
237 stk1160_write_reg(dev, STK1160_DCTRL+3, 0x00);
238
239 /* Stop saa711x */
240 v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
241}
242
243static int stk1160_stop_streaming(struct stk1160 *dev)
244{
245 if (mutex_lock_interruptible(&dev->v4l_lock))
246 return -ERESTARTSYS;
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
268static 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 */
281static 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
297static 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
308static 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
324static 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
9cb2173e
EG		 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
c6b69c6c 336 f->fmt.pix.pixelformat = dev->fmt->fourcc;
9cb2173e
EG		 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
347static 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;
9cb2173e
EG		 352
353 if (vb2_is_busy(q))
354 return -EBUSY;
355
c6b69c6c 356 vidioc_try_fmt_vid_cap(file, priv, f);
9cb2173e
EG		 357
358 /* We don't support any format changes */
359
360 return 0;
361}
362
363static 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
370static 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
378static 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 (vb2_is_busy(q))
384 return -EBUSY;
385
386 /* Check device presence */
387 if (!dev->udev)
388 return -ENODEV;
389
390 /* We need to set this now, before we call stk1160_set_std */
391 dev->norm = *norm;
392
393 /* This is taken from saa7115 video decoder */
394 if (dev->norm & V4L2_STD_525_60) {
395 dev->width = 720;
396 dev->height = 480;
397 } else if (dev->norm & V4L2_STD_625_50) {
398 dev->width = 720;
399 dev->height = 576;
400 } else {
401 stk1160_err("invalid standard\n");
402 return -EINVAL;
403 }
404
405 stk1160_set_std(dev);
406
407 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std,
408 dev->norm);
409
410 return 0;
411}
412
413
414static int vidioc_enum_input(struct file *file, void *priv,
415 struct v4l2_input *i)
416{
417 struct stk1160 *dev = video_drvdata(file);
418
419 if (i->index > STK1160_MAX_INPUT)
420 return -EINVAL;
421
56a960bf
EG		 422 /* S-Video special handling */
423 if (i->index == STK1160_SVIDEO_INPUT)
424 sprintf(i->name, "S-Video");
425 else
426 sprintf(i->name, "Composite%d", i->index);
427
9cb2173e
EG		 428 i->type = V4L2_INPUT_TYPE_CAMERA;
429 i->std = dev->vdev.tvnorms;
430 return 0;
431}
432
433static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
434{
435 struct stk1160 *dev = video_drvdata(file);
436 *i = dev->ctl_input;
437 return 0;
438}
439
440static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
441{
442 struct stk1160 *dev = video_drvdata(file);
443
444 if (vb2_is_busy(&dev->vb_vidq))
445 return -EBUSY;
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
457static int vidioc_g_chip_ident(struct file *file, void *priv,
458 struct v4l2_dbg_chip_ident *chip)
459{
460 switch (chip->match.type) {
461 case V4L2_CHIP_MATCH_HOST:
462 chip->ident = V4L2_IDENT_NONE;
463 chip->revision = 0;
464 return 0;
465 default:
466 return -EINVAL;
467 }
468}
469
470#ifdef CONFIG_VIDEO_ADV_DEBUG
471static int vidioc_g_register(struct file *file, void *priv,
472 struct v4l2_dbg_register *reg)
473{
474 struct stk1160 *dev = video_drvdata(file);
475 int rc;
476 u8 val;
477
478 switch (reg->match.type) {
479 case V4L2_CHIP_MATCH_AC97:
480 /* TODO: Support me please :-( */
481 return -EINVAL;
482 case V4L2_CHIP_MATCH_I2C_DRIVER:
483 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
484 return 0;
485 case V4L2_CHIP_MATCH_I2C_ADDR:
486 /* TODO: is this correct? */
487 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
488 return 0;
489 default:
490 if (!v4l2_chip_match_host(&reg->match))
491 return -EINVAL;
492 }
493
494 /* Match host */
495 rc = stk1160_read_reg(dev, reg->reg, &val);
496 reg->val = val;
497 reg->size = 1;
498
499 return rc;
500}
501
502static int vidioc_s_register(struct file *file, void *priv,
503 struct v4l2_dbg_register *reg)
504{
505 struct stk1160 *dev = video_drvdata(file);
506
507 switch (reg->match.type) {
508 case V4L2_CHIP_MATCH_AC97:
509 return -EINVAL;
510 case V4L2_CHIP_MATCH_I2C_DRIVER:
511 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
512 return 0;
513 case V4L2_CHIP_MATCH_I2C_ADDR:
514 /* TODO: is this correct? */
515 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
516 return 0;
517 default:
518 if (!v4l2_chip_match_host(&reg->match))
519 return -EINVAL;
520 }
521
522 /* Match host */
523 return stk1160_write_reg(dev, reg->reg, cpu_to_le16(reg->val));
524}
525#endif
526
527static const struct v4l2_ioctl_ops stk1160_ioctl_ops = {
528 .vidioc_querycap = vidioc_querycap,
529 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
530 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
531 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
532 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
533 .vidioc_querystd = vidioc_querystd,
534 .vidioc_g_std = vidioc_g_std,
535 .vidioc_s_std = vidioc_s_std,
536 .vidioc_enum_input = vidioc_enum_input,
537 .vidioc_g_input = vidioc_g_input,
538 .vidioc_s_input = vidioc_s_input,
539
540 /* vb2 takes care of these */
541 .vidioc_reqbufs = vb2_ioctl_reqbufs,
542 .vidioc_querybuf = vb2_ioctl_querybuf,
543 .vidioc_qbuf = vb2_ioctl_qbuf,
544 .vidioc_dqbuf = vb2_ioctl_dqbuf,
545 .vidioc_streamon = vb2_ioctl_streamon,
546 .vidioc_streamoff = vb2_ioctl_streamoff,
547
548 .vidioc_log_status = v4l2_ctrl_log_status,
549 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
550 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
551 .vidioc_g_chip_ident = vidioc_g_chip_ident,
552
553#ifdef CONFIG_VIDEO_ADV_DEBUG
554 .vidioc_g_register = vidioc_g_register,
555 .vidioc_s_register = vidioc_s_register,
556#endif
557};
558
559/********************************************************************/
560
561/*
562 * Videobuf2 operations
563 */
564static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *v4l_fmt,
565 unsigned int *nbuffers, unsigned int *nplanes,
566 unsigned int sizes[], void *alloc_ctxs[])
567{
568 struct stk1160 *dev = vb2_get_drv_priv(vq);
569 unsigned long size;
570
571 size = dev->width * dev->height * 2;
572
573 /*
574 * Here we can change the number of buffers being requested.
575 * So, we set a minimum and a maximum like this:
576 */
577 *nbuffers = clamp_t(unsigned int, *nbuffers,
578 STK1160_MIN_VIDEO_BUFFERS, STK1160_MAX_VIDEO_BUFFERS);
579
580 /* This means a packed colorformat */
581 *nplanes = 1;
582
583 sizes[0] = size;
584
585 stk1160_info("%s: buffer count %d, each %ld bytes\n",
586 __func__, *nbuffers, size);
587
588 return 0;
589}
590
591static void buffer_queue(struct vb2_buffer *vb)
592{
593 unsigned long flags;
594 struct stk1160 *dev = vb2_get_drv_priv(vb->vb2_queue);
595 struct stk1160_buffer *buf =
596 container_of(vb, struct stk1160_buffer, vb);
597
598 spin_lock_irqsave(&dev->buf_lock, flags);
599 if (!dev->udev) {
600 /*
601 * If the device is disconnected return the buffer to userspace
602 * directly. The next QBUF call will fail with -ENODEV.
603 */
604 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
605 } else {
606
607 buf->mem = vb2_plane_vaddr(vb, 0);
608 buf->length = vb2_plane_size(vb, 0);
609 buf->bytesused = 0;
610 buf->pos = 0;
611
612 /*
613 * If buffer length is less from expected then we return
614 * the buffer to userspace directly.
615 */
616 if (buf->length < dev->width * dev->height * 2)
617 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
618 else
619 list_add_tail(&buf->list, &dev->avail_bufs);
620
621 }
622 spin_unlock_irqrestore(&dev->buf_lock, flags);
623}
624
625static int start_streaming(struct vb2_queue *vq, unsigned int count)
626{
627 struct stk1160 *dev = vb2_get_drv_priv(vq);
628 return stk1160_start_streaming(dev);
629}
630
631/* abort streaming and wait for last buffer */
632static int stop_streaming(struct vb2_queue *vq)
633{
634 struct stk1160 *dev = vb2_get_drv_priv(vq);
635 return stk1160_stop_streaming(dev);
636}
637
638static struct vb2_ops stk1160_video_qops = {
639 .queue_setup = queue_setup,
640 .buf_queue = buffer_queue,
641 .start_streaming = start_streaming,
642 .stop_streaming = stop_streaming,
643 .wait_prepare = vb2_ops_wait_prepare,
644 .wait_finish = vb2_ops_wait_finish,
645};
646
647static struct video_device v4l_template = {
648 .name = "stk1160",
649 .tvnorms = V4L2_STD_525_60 | V4L2_STD_625_50,
650 .fops = &stk1160_fops,
651 .ioctl_ops = &stk1160_ioctl_ops,
652 .release = video_device_release_empty,
653};
654
655/********************************************************************/
656
657/* Must be called with both v4l_lock and vb_queue_lock hold */
658void stk1160_clear_queue(struct stk1160 *dev)
659{
660 struct stk1160_buffer *buf;
661 unsigned long flags;
662
663 /* Release all active buffers */
664 spin_lock_irqsave(&dev->buf_lock, flags);
665 while (!list_empty(&dev->avail_bufs)) {
666 buf = list_first_entry(&dev->avail_bufs,
667 struct stk1160_buffer, list);
668 list_del(&buf->list);
669 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
670 stk1160_info("buffer [%p/%d] aborted\n",
671 buf, buf->vb.v4l2_buf.index);
672 }
673 /* It's important to clear current buffer */
674 dev->isoc_ctl.buf = NULL;
675 spin_unlock_irqrestore(&dev->buf_lock, flags);
676}
677
678int stk1160_vb2_setup(struct stk1160 *dev)
679{
680 int rc;
681 struct vb2_queue *q;
682
683 q = &dev->vb_vidq;
9cb2173e
EG		 684 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
685 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR;
686 q->drv_priv = dev;
687 q->buf_struct_size = sizeof(struct stk1160_buffer);
688 q->ops = &stk1160_video_qops;
689 q->mem_ops = &vb2_vmalloc_memops;
690
691 rc = vb2_queue_init(q);
692 if (rc < 0)
693 return rc;
694
695 /* initialize video dma queue */
696 INIT_LIST_HEAD(&dev->avail_bufs);
697
698 return 0;
699}
700
701int stk1160_video_register(struct stk1160 *dev)
702{
703 int rc;
704
705 /* Initialize video_device with a template structure */
706 dev->vdev = v4l_template;
707 dev->vdev.debug = vidioc_debug;
708 dev->vdev.queue = &dev->vb_vidq;
709
710 /*
711 * Provide mutexes for v4l2 core and for videobuf2 queue.
712 * It will be used to protect *only* v4l2 ioctls.
713 */
714 dev->vdev.lock = &dev->v4l_lock;
715 dev->vdev.queue->lock = &dev->vb_queue_lock;
716
717 /* This will be used to set video_device parent */
718 dev->vdev.v4l2_dev = &dev->v4l2_dev;
719 set_bit(V4L2_FL_USE_FH_PRIO, &dev->vdev.flags);
720
721 /* NTSC is default */
722 dev->norm = V4L2_STD_NTSC_M;
723 dev->width = 720;
724 dev->height = 480;
725
726 /* set default format */
727 dev->fmt = &format[0];
728 stk1160_set_std(dev);
729
730 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std,
731 dev->norm);
732
733 video_set_drvdata(&dev->vdev, dev);
734 rc = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
735 if (rc < 0) {
736 stk1160_err("video_register_device failed (%d)\n", rc);
737 return rc;
738 }
739
740 v4l2_info(&dev->v4l2_dev, "V4L2 device registered as %s\n",
741 video_device_node_name(&dev->vdev));
742
743 return 0;
744}
Linux kernel - Deliverables
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