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 
42 static unsigned int vidioc_debug;
43 module_param(vidioc_debug, int, 0644);
44 MODULE_PARM_DESC(vidioc_debug, "enable debug messages [vidioc]");
45 
46 static bool keep_buffers;
47 module_param(keep_buffers, bool, 0644);
48 MODULE_PARM_DESC(keep_buffers, "don't release buffers upon stop streaming");
49 
50 /* supported video standards */
51 static 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 
59 static 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  */
118 static 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 
160 static int stk1160_start_streaming(struct stk1160 *dev)
161 {
162 	bool new_pkt_size;
163 	int rc = 0;
164 	int i;
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)
187 			goto out_stop_hw;
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);
195 			goto out_uninit;
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 
208 	mutex_unlock(&dev->v4l_lock);
209 
210 	return 0;
211 
212 out_uninit:
213 	stk1160_uninit_isoc(dev);
214 out_stop_hw:
215 	usb_set_interface(dev->udev, 0, 0);
216 	stk1160_clear_queue(dev);
217 
218 	mutex_unlock(&dev->v4l_lock);
219 
220 	return rc;
221 }
222 
223 /* Must be called with v4l_lock hold */
224 static 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 
243 static 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 
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  */
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 
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 
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 
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 
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 
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 
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 
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 (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 
414 static 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 
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 
428 	i->type = V4L2_INPUT_TYPE_CAMERA;
429 	i->std = dev->vdev.tvnorms;
430 	return 0;
431 }
432 
433 static 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 
440 static 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 
457 static 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_BRIDGE:
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
471 static 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_I2C_DRIVER:
480 		v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
481 		return 0;
482 	case V4L2_CHIP_MATCH_I2C_ADDR:
483 		/* TODO: is this correct? */
484 		v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
485 		return 0;
486 	default:
487 		if (!v4l2_chip_match_host(&reg->match))
488 			return -EINVAL;
489 	}
490 
491 	/* Match host */
492 	rc = stk1160_read_reg(dev, reg->reg, &val);
493 	reg->val = val;
494 	reg->size = 1;
495 
496 	return rc;
497 }
498 
499 static int vidioc_s_register(struct file *file, void *priv,
500 			     const struct v4l2_dbg_register *reg)
501 {
502 	struct stk1160 *dev = video_drvdata(file);
503 
504 	switch (reg->match.type) {
505 	case V4L2_CHIP_MATCH_I2C_DRIVER:
506 		v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
507 		return 0;
508 	case V4L2_CHIP_MATCH_I2C_ADDR:
509 		/* TODO: is this correct? */
510 		v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
511 		return 0;
512 	default:
513 		if (!v4l2_chip_match_host(&reg->match))
514 			return -EINVAL;
515 	}
516 
517 	/* Match host */
518 	return stk1160_write_reg(dev, reg->reg, cpu_to_le16(reg->val));
519 }
520 #endif
521 
522 static const struct v4l2_ioctl_ops stk1160_ioctl_ops = {
523 	.vidioc_querycap      = vidioc_querycap,
524 	.vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt_vid_cap,
525 	.vidioc_g_fmt_vid_cap     = vidioc_g_fmt_vid_cap,
526 	.vidioc_try_fmt_vid_cap   = vidioc_try_fmt_vid_cap,
527 	.vidioc_s_fmt_vid_cap     = vidioc_s_fmt_vid_cap,
528 	.vidioc_querystd      = vidioc_querystd,
529 	.vidioc_g_std         = vidioc_g_std,
530 	.vidioc_s_std         = vidioc_s_std,
531 	.vidioc_enum_input    = vidioc_enum_input,
532 	.vidioc_g_input       = vidioc_g_input,
533 	.vidioc_s_input       = vidioc_s_input,
534 
535 	/* vb2 takes care of these */
536 	.vidioc_reqbufs       = vb2_ioctl_reqbufs,
537 	.vidioc_querybuf      = vb2_ioctl_querybuf,
538 	.vidioc_qbuf          = vb2_ioctl_qbuf,
539 	.vidioc_dqbuf         = vb2_ioctl_dqbuf,
540 	.vidioc_streamon      = vb2_ioctl_streamon,
541 	.vidioc_streamoff     = vb2_ioctl_streamoff,
542 
543 	.vidioc_log_status  = v4l2_ctrl_log_status,
544 	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
545 	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
546 	.vidioc_g_chip_ident = vidioc_g_chip_ident,
547 
548 #ifdef CONFIG_VIDEO_ADV_DEBUG
549 	.vidioc_g_register = vidioc_g_register,
550 	.vidioc_s_register = vidioc_s_register,
551 #endif
552 };
553 
554 /********************************************************************/
555 
556 /*
557  * Videobuf2 operations
558  */
559 static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *v4l_fmt,
560 				unsigned int *nbuffers, unsigned int *nplanes,
561 				unsigned int sizes[], void *alloc_ctxs[])
562 {
563 	struct stk1160 *dev = vb2_get_drv_priv(vq);
564 	unsigned long size;
565 
566 	size = dev->width * dev->height * 2;
567 
568 	/*
569 	 * Here we can change the number of buffers being requested.
570 	 * So, we set a minimum and a maximum like this:
571 	 */
572 	*nbuffers = clamp_t(unsigned int, *nbuffers,
573 			STK1160_MIN_VIDEO_BUFFERS, STK1160_MAX_VIDEO_BUFFERS);
574 
575 	/* This means a packed colorformat */
576 	*nplanes = 1;
577 
578 	sizes[0] = size;
579 
580 	stk1160_info("%s: buffer count %d, each %ld bytes\n",
581 			__func__, *nbuffers, size);
582 
583 	return 0;
584 }
585 
586 static void buffer_queue(struct vb2_buffer *vb)
587 {
588 	unsigned long flags;
589 	struct stk1160 *dev = vb2_get_drv_priv(vb->vb2_queue);
590 	struct stk1160_buffer *buf =
591 		container_of(vb, struct stk1160_buffer, vb);
592 
593 	spin_lock_irqsave(&dev->buf_lock, flags);
594 	if (!dev->udev) {
595 		/*
596 		 * If the device is disconnected return the buffer to userspace
597 		 * directly. The next QBUF call will fail with -ENODEV.
598 		 */
599 		vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
600 	} else {
601 
602 		buf->mem = vb2_plane_vaddr(vb, 0);
603 		buf->length = vb2_plane_size(vb, 0);
604 		buf->bytesused = 0;
605 		buf->pos = 0;
606 
607 		/*
608 		 * If buffer length is less from expected then we return
609 		 * the buffer to userspace directly.
610 		 */
611 		if (buf->length < dev->width * dev->height * 2)
612 			vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
613 		else
614 			list_add_tail(&buf->list, &dev->avail_bufs);
615 
616 	}
617 	spin_unlock_irqrestore(&dev->buf_lock, flags);
618 }
619 
620 static int start_streaming(struct vb2_queue *vq, unsigned int count)
621 {
622 	struct stk1160 *dev = vb2_get_drv_priv(vq);
623 	return stk1160_start_streaming(dev);
624 }
625 
626 /* abort streaming and wait for last buffer */
627 static int stop_streaming(struct vb2_queue *vq)
628 {
629 	struct stk1160 *dev = vb2_get_drv_priv(vq);
630 	return stk1160_stop_streaming(dev);
631 }
632 
633 static struct vb2_ops stk1160_video_qops = {
634 	.queue_setup		= queue_setup,
635 	.buf_queue		= buffer_queue,
636 	.start_streaming	= start_streaming,
637 	.stop_streaming		= stop_streaming,
638 	.wait_prepare		= vb2_ops_wait_prepare,
639 	.wait_finish		= vb2_ops_wait_finish,
640 };
641 
642 static struct video_device v4l_template = {
643 	.name = "stk1160",
644 	.tvnorms = V4L2_STD_525_60 | V4L2_STD_625_50,
645 	.fops = &stk1160_fops,
646 	.ioctl_ops = &stk1160_ioctl_ops,
647 	.release = video_device_release_empty,
648 };
649 
650 /********************************************************************/
651 
652 /* Must be called with both v4l_lock and vb_queue_lock hold */
653 void stk1160_clear_queue(struct stk1160 *dev)
654 {
655 	struct stk1160_buffer *buf;
656 	unsigned long flags;
657 
658 	/* Release all active buffers */
659 	spin_lock_irqsave(&dev->buf_lock, flags);
660 	while (!list_empty(&dev->avail_bufs)) {
661 		buf = list_first_entry(&dev->avail_bufs,
662 			struct stk1160_buffer, list);
663 		list_del(&buf->list);
664 		vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
665 		stk1160_info("buffer [%p/%d] aborted\n",
666 				buf, buf->vb.v4l2_buf.index);
667 	}
668 	/* It's important to clear current buffer */
669 	dev->isoc_ctl.buf = NULL;
670 	spin_unlock_irqrestore(&dev->buf_lock, flags);
671 }
672 
673 int stk1160_vb2_setup(struct stk1160 *dev)
674 {
675 	int rc;
676 	struct vb2_queue *q;
677 
678 	q = &dev->vb_vidq;
679 	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
680 	q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR;
681 	q->drv_priv = dev;
682 	q->buf_struct_size = sizeof(struct stk1160_buffer);
683 	q->ops = &stk1160_video_qops;
684 	q->mem_ops = &vb2_vmalloc_memops;
685 	q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
686 
687 	rc = vb2_queue_init(q);
688 	if (rc < 0)
689 		return rc;
690 
691 	/* initialize video dma queue */
692 	INIT_LIST_HEAD(&dev->avail_bufs);
693 
694 	return 0;
695 }
696 
697 int stk1160_video_register(struct stk1160 *dev)
698 {
699 	int rc;
700 
701 	/* Initialize video_device with a template structure */
702 	dev->vdev = v4l_template;
703 	dev->vdev.debug = vidioc_debug;
704 	dev->vdev.queue = &dev->vb_vidq;
705 
706 	/*
707 	 * Provide mutexes for v4l2 core and for videobuf2 queue.
708 	 * It will be used to protect *only* v4l2 ioctls.
709 	 */
710 	dev->vdev.lock = &dev->v4l_lock;
711 	dev->vdev.queue->lock = &dev->vb_queue_lock;
712 
713 	/* This will be used to set video_device parent */
714 	dev->vdev.v4l2_dev = &dev->v4l2_dev;
715 	set_bit(V4L2_FL_USE_FH_PRIO, &dev->vdev.flags);
716 
717 	/* NTSC is default */
718 	dev->norm = V4L2_STD_NTSC_M;
719 	dev->width = 720;
720 	dev->height = 480;
721 
722 	/* set default format */
723 	dev->fmt = &format[0];
724 	stk1160_set_std(dev);
725 
726 	v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std,
727 			dev->norm);
728 
729 	video_set_drvdata(&dev->vdev, dev);
730 	rc = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
731 	if (rc < 0) {
732 		stk1160_err("video_register_device failed (%d)\n", rc);
733 		return rc;
734 	}
735 
736 	v4l2_info(&dev->v4l2_dev, "V4L2 device registered as %s\n",
737 		  video_device_node_name(&dev->vdev));
738 
739 	return 0;
740 }
741