1 /*
2 * Fushicai USBTV007 Audio-Video Grabber Driver
3 *
4 * Product web site:
5 * http://www.fushicai.com/products_detail/&productId=d05449ee-b690-42f9-a661-aa7353894bed.html
6 *
7 * Following LWN articles were very useful in construction of this driver:
8 * Video4Linux2 API series: http://lwn.net/Articles/203924/
9 * videobuf2 API explanation: http://lwn.net/Articles/447435/
10 * Thanks go to Jonathan Corbet for providing this quality documentation.
11 * He is awesome.
12 *
13 * Copyright (c) 2013 Lubomir Rintel
14 * All rights reserved.
15 * No physical hardware was harmed running Windows during the
16 * reverse-engineering activity
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
20 * are met:
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions, and the following disclaimer,
23 * without modification.
24 * 2. The name of the author may not be used to endorse or promote products
25 * derived from this software without specific prior written permission.
26 *
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL").
29 */
30
31 #include <media/v4l2-ioctl.h>
32 #include <media/videobuf2-v4l2.h>
33
34 #include "usbtv.h"
35
36 static struct usbtv_norm_params norm_params[] = {
37 {
38 .norm = V4L2_STD_525_60,
39 .cap_width = 720,
40 .cap_height = 480,
41 },
42 {
43 .norm = V4L2_STD_PAL,
44 .cap_width = 720,
45 .cap_height = 576,
46 }
47 };
48
usbtv_configure_for_norm(struct usbtv * usbtv,v4l2_std_id norm)49 static int usbtv_configure_for_norm(struct usbtv *usbtv, v4l2_std_id norm)
50 {
51 int i, ret = 0;
52 struct usbtv_norm_params *params = NULL;
53
54 for (i = 0; i < ARRAY_SIZE(norm_params); i++) {
55 if (norm_params[i].norm & norm) {
56 params = &norm_params[i];
57 break;
58 }
59 }
60
61 if (params) {
62 usbtv->width = params->cap_width;
63 usbtv->height = params->cap_height;
64 usbtv->n_chunks = usbtv->width * usbtv->height
65 / 4 / USBTV_CHUNK;
66 usbtv->norm = params->norm;
67 } else
68 ret = -EINVAL;
69
70 return ret;
71 }
72
usbtv_select_input(struct usbtv * usbtv,int input)73 static int usbtv_select_input(struct usbtv *usbtv, int input)
74 {
75 int ret;
76
77 static const u16 composite[][2] = {
78 { USBTV_BASE + 0x0105, 0x0060 },
79 { USBTV_BASE + 0x011f, 0x00f2 },
80 { USBTV_BASE + 0x0127, 0x0060 },
81 { USBTV_BASE + 0x00ae, 0x0010 },
82 { USBTV_BASE + 0x0239, 0x0060 },
83 };
84
85 static const u16 svideo[][2] = {
86 { USBTV_BASE + 0x0105, 0x0010 },
87 { USBTV_BASE + 0x011f, 0x00ff },
88 { USBTV_BASE + 0x0127, 0x0060 },
89 { USBTV_BASE + 0x00ae, 0x0030 },
90 { USBTV_BASE + 0x0239, 0x0060 },
91 };
92
93 switch (input) {
94 case USBTV_COMPOSITE_INPUT:
95 ret = usbtv_set_regs(usbtv, composite, ARRAY_SIZE(composite));
96 break;
97 case USBTV_SVIDEO_INPUT:
98 ret = usbtv_set_regs(usbtv, svideo, ARRAY_SIZE(svideo));
99 break;
100 default:
101 ret = -EINVAL;
102 }
103
104 if (!ret)
105 usbtv->input = input;
106
107 return ret;
108 }
109
usbtv_select_norm(struct usbtv * usbtv,v4l2_std_id norm)110 static int usbtv_select_norm(struct usbtv *usbtv, v4l2_std_id norm)
111 {
112 int ret;
113 static const u16 pal[][2] = {
114 { USBTV_BASE + 0x001a, 0x0068 },
115 { USBTV_BASE + 0x010e, 0x0072 },
116 { USBTV_BASE + 0x010f, 0x00a2 },
117 { USBTV_BASE + 0x0112, 0x00b0 },
118 { USBTV_BASE + 0x0117, 0x0001 },
119 { USBTV_BASE + 0x0118, 0x002c },
120 { USBTV_BASE + 0x012d, 0x0010 },
121 { USBTV_BASE + 0x012f, 0x0020 },
122 { USBTV_BASE + 0x024f, 0x0002 },
123 { USBTV_BASE + 0x0254, 0x0059 },
124 { USBTV_BASE + 0x025a, 0x0016 },
125 { USBTV_BASE + 0x025b, 0x0035 },
126 { USBTV_BASE + 0x0263, 0x0017 },
127 { USBTV_BASE + 0x0266, 0x0016 },
128 { USBTV_BASE + 0x0267, 0x0036 }
129 };
130
131 static const u16 ntsc[][2] = {
132 { USBTV_BASE + 0x001a, 0x0079 },
133 { USBTV_BASE + 0x010e, 0x0068 },
134 { USBTV_BASE + 0x010f, 0x009c },
135 { USBTV_BASE + 0x0112, 0x00f0 },
136 { USBTV_BASE + 0x0117, 0x0000 },
137 { USBTV_BASE + 0x0118, 0x00fc },
138 { USBTV_BASE + 0x012d, 0x0004 },
139 { USBTV_BASE + 0x012f, 0x0008 },
140 { USBTV_BASE + 0x024f, 0x0001 },
141 { USBTV_BASE + 0x0254, 0x005f },
142 { USBTV_BASE + 0x025a, 0x0012 },
143 { USBTV_BASE + 0x025b, 0x0001 },
144 { USBTV_BASE + 0x0263, 0x001c },
145 { USBTV_BASE + 0x0266, 0x0011 },
146 { USBTV_BASE + 0x0267, 0x0005 }
147 };
148
149 ret = usbtv_configure_for_norm(usbtv, norm);
150
151 if (!ret) {
152 if (norm & V4L2_STD_525_60)
153 ret = usbtv_set_regs(usbtv, ntsc, ARRAY_SIZE(ntsc));
154 else if (norm & V4L2_STD_PAL)
155 ret = usbtv_set_regs(usbtv, pal, ARRAY_SIZE(pal));
156 }
157
158 return ret;
159 }
160
usbtv_setup_capture(struct usbtv * usbtv)161 static int usbtv_setup_capture(struct usbtv *usbtv)
162 {
163 int ret;
164 static const u16 setup[][2] = {
165 /* These seem to enable the device. */
166 { USBTV_BASE + 0x0008, 0x0001 },
167 { USBTV_BASE + 0x01d0, 0x00ff },
168 { USBTV_BASE + 0x01d9, 0x0002 },
169
170 /* These seem to influence color parameters, such as
171 * brightness, etc. */
172 { USBTV_BASE + 0x0239, 0x0040 },
173 { USBTV_BASE + 0x0240, 0x0000 },
174 { USBTV_BASE + 0x0241, 0x0000 },
175 { USBTV_BASE + 0x0242, 0x0002 },
176 { USBTV_BASE + 0x0243, 0x0080 },
177 { USBTV_BASE + 0x0244, 0x0012 },
178 { USBTV_BASE + 0x0245, 0x0090 },
179 { USBTV_BASE + 0x0246, 0x0000 },
180
181 { USBTV_BASE + 0x0278, 0x002d },
182 { USBTV_BASE + 0x0279, 0x000a },
183 { USBTV_BASE + 0x027a, 0x0032 },
184 { 0xf890, 0x000c },
185 { 0xf894, 0x0086 },
186
187 { USBTV_BASE + 0x00ac, 0x00c0 },
188 { USBTV_BASE + 0x00ad, 0x0000 },
189 { USBTV_BASE + 0x00a2, 0x0012 },
190 { USBTV_BASE + 0x00a3, 0x00e0 },
191 { USBTV_BASE + 0x00a4, 0x0028 },
192 { USBTV_BASE + 0x00a5, 0x0082 },
193 { USBTV_BASE + 0x00a7, 0x0080 },
194 { USBTV_BASE + 0x0000, 0x0014 },
195 { USBTV_BASE + 0x0006, 0x0003 },
196 { USBTV_BASE + 0x0090, 0x0099 },
197 { USBTV_BASE + 0x0091, 0x0090 },
198 { USBTV_BASE + 0x0094, 0x0068 },
199 { USBTV_BASE + 0x0095, 0x0070 },
200 { USBTV_BASE + 0x009c, 0x0030 },
201 { USBTV_BASE + 0x009d, 0x00c0 },
202 { USBTV_BASE + 0x009e, 0x00e0 },
203 { USBTV_BASE + 0x0019, 0x0006 },
204 { USBTV_BASE + 0x008c, 0x00ba },
205 { USBTV_BASE + 0x0101, 0x00ff },
206 { USBTV_BASE + 0x010c, 0x00b3 },
207 { USBTV_BASE + 0x01b2, 0x0080 },
208 { USBTV_BASE + 0x01b4, 0x00a0 },
209 { USBTV_BASE + 0x014c, 0x00ff },
210 { USBTV_BASE + 0x014d, 0x00ca },
211 { USBTV_BASE + 0x0113, 0x0053 },
212 { USBTV_BASE + 0x0119, 0x008a },
213 { USBTV_BASE + 0x013c, 0x0003 },
214 { USBTV_BASE + 0x0150, 0x009c },
215 { USBTV_BASE + 0x0151, 0x0071 },
216 { USBTV_BASE + 0x0152, 0x00c6 },
217 { USBTV_BASE + 0x0153, 0x0084 },
218 { USBTV_BASE + 0x0154, 0x00bc },
219 { USBTV_BASE + 0x0155, 0x00a0 },
220 { USBTV_BASE + 0x0156, 0x00a0 },
221 { USBTV_BASE + 0x0157, 0x009c },
222 { USBTV_BASE + 0x0158, 0x001f },
223 { USBTV_BASE + 0x0159, 0x0006 },
224 { USBTV_BASE + 0x015d, 0x0000 },
225
226 { USBTV_BASE + 0x0003, 0x0004 },
227 { USBTV_BASE + 0x0100, 0x00d3 },
228 { USBTV_BASE + 0x0115, 0x0015 },
229 { USBTV_BASE + 0x0220, 0x002e },
230 { USBTV_BASE + 0x0225, 0x0008 },
231 { USBTV_BASE + 0x024e, 0x0002 },
232 { USBTV_BASE + 0x024e, 0x0002 },
233 { USBTV_BASE + 0x024f, 0x0002 },
234 };
235
236 ret = usbtv_set_regs(usbtv, setup, ARRAY_SIZE(setup));
237 if (ret)
238 return ret;
239
240 ret = usbtv_select_norm(usbtv, usbtv->norm);
241 if (ret)
242 return ret;
243
244 ret = usbtv_select_input(usbtv, usbtv->input);
245 if (ret)
246 return ret;
247
248 return 0;
249 }
250
251 /* Copy data from chunk into a frame buffer, deinterlacing the data
252 * into every second line. Unfortunately, they don't align nicely into
253 * 720 pixel lines, as the chunk is 240 words long, which is 480 pixels.
254 * Therefore, we break down the chunk into two halves before copyting,
255 * so that we can interleave a line if needed. */
usbtv_chunk_to_vbuf(u32 * frame,__be32 * src,int chunk_no,int odd)256 static void usbtv_chunk_to_vbuf(u32 *frame, __be32 *src, int chunk_no, int odd)
257 {
258 int half;
259
260 for (half = 0; half < 2; half++) {
261 int part_no = chunk_no * 2 + half;
262 int line = part_no / 3;
263 int part_index = (line * 2 + !odd) * 3 + (part_no % 3);
264
265 u32 *dst = &frame[part_index * USBTV_CHUNK/2];
266
267 memcpy(dst, src, USBTV_CHUNK/2 * sizeof(*src));
268 src += USBTV_CHUNK/2;
269 }
270 }
271
272 /* Called for each 256-byte image chunk.
273 * First word identifies the chunk, followed by 240 words of image
274 * data and padding. */
usbtv_image_chunk(struct usbtv * usbtv,__be32 * chunk)275 static void usbtv_image_chunk(struct usbtv *usbtv, __be32 *chunk)
276 {
277 int frame_id, odd, chunk_no;
278 u32 *frame;
279 struct usbtv_buf *buf;
280 unsigned long flags;
281
282 /* Ignore corrupted lines. */
283 if (!USBTV_MAGIC_OK(chunk))
284 return;
285 frame_id = USBTV_FRAME_ID(chunk);
286 odd = USBTV_ODD(chunk);
287 chunk_no = USBTV_CHUNK_NO(chunk);
288 if (chunk_no >= usbtv->n_chunks)
289 return;
290
291 /* Beginning of a frame. */
292 if (chunk_no == 0) {
293 usbtv->frame_id = frame_id;
294 usbtv->chunks_done = 0;
295 }
296
297 if (usbtv->frame_id != frame_id)
298 return;
299
300 spin_lock_irqsave(&usbtv->buflock, flags);
301 if (list_empty(&usbtv->bufs)) {
302 /* No free buffers. Userspace likely too slow. */
303 spin_unlock_irqrestore(&usbtv->buflock, flags);
304 return;
305 }
306
307 /* First available buffer. */
308 buf = list_first_entry(&usbtv->bufs, struct usbtv_buf, list);
309 frame = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
310
311 /* Copy the chunk data. */
312 usbtv_chunk_to_vbuf(frame, &chunk[1], chunk_no, odd);
313 usbtv->chunks_done++;
314
315 /* Last chunk in a frame, signalling an end */
316 if (odd && chunk_no == usbtv->n_chunks-1) {
317 int size = vb2_plane_size(&buf->vb.vb2_buf, 0);
318 enum vb2_buffer_state state = usbtv->chunks_done ==
319 usbtv->n_chunks ?
320 VB2_BUF_STATE_DONE :
321 VB2_BUF_STATE_ERROR;
322
323 buf->vb.field = V4L2_FIELD_INTERLACED;
324 buf->vb.sequence = usbtv->sequence++;
325 v4l2_get_timestamp(&buf->vb.timestamp);
326 vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);
327 vb2_buffer_done(&buf->vb.vb2_buf, state);
328 list_del(&buf->list);
329 }
330
331 spin_unlock_irqrestore(&usbtv->buflock, flags);
332 }
333
334 /* Got image data. Each packet contains a number of 256-word chunks we
335 * compose the image from. */
usbtv_iso_cb(struct urb * ip)336 static void usbtv_iso_cb(struct urb *ip)
337 {
338 int ret;
339 int i;
340 struct usbtv *usbtv = (struct usbtv *)ip->context;
341
342 switch (ip->status) {
343 /* All fine. */
344 case 0:
345 break;
346 /* Device disconnected or capture stopped? */
347 case -ENODEV:
348 case -ENOENT:
349 case -ECONNRESET:
350 case -ESHUTDOWN:
351 return;
352 /* Unknown error. Retry. */
353 default:
354 dev_warn(usbtv->dev, "Bad response for ISO request.\n");
355 goto resubmit;
356 }
357
358 for (i = 0; i < ip->number_of_packets; i++) {
359 int size = ip->iso_frame_desc[i].actual_length;
360 unsigned char *data = ip->transfer_buffer +
361 ip->iso_frame_desc[i].offset;
362 int offset;
363
364 for (offset = 0; USBTV_CHUNK_SIZE * offset < size; offset++)
365 usbtv_image_chunk(usbtv,
366 (__be32 *)&data[USBTV_CHUNK_SIZE * offset]);
367 }
368
369 resubmit:
370 ret = usb_submit_urb(ip, GFP_ATOMIC);
371 if (ret < 0)
372 dev_warn(usbtv->dev, "Could not resubmit ISO URB\n");
373 }
374
usbtv_setup_iso_transfer(struct usbtv * usbtv)375 static struct urb *usbtv_setup_iso_transfer(struct usbtv *usbtv)
376 {
377 struct urb *ip;
378 int size = usbtv->iso_size;
379 int i;
380
381 ip = usb_alloc_urb(USBTV_ISOC_PACKETS, GFP_KERNEL);
382 if (ip == NULL)
383 return NULL;
384
385 ip->dev = usbtv->udev;
386 ip->context = usbtv;
387 ip->pipe = usb_rcvisocpipe(usbtv->udev, USBTV_VIDEO_ENDP);
388 ip->interval = 1;
389 ip->transfer_flags = URB_ISO_ASAP;
390 ip->transfer_buffer = kzalloc(size * USBTV_ISOC_PACKETS,
391 GFP_KERNEL);
392 ip->complete = usbtv_iso_cb;
393 ip->number_of_packets = USBTV_ISOC_PACKETS;
394 ip->transfer_buffer_length = size * USBTV_ISOC_PACKETS;
395 for (i = 0; i < USBTV_ISOC_PACKETS; i++) {
396 ip->iso_frame_desc[i].offset = size * i;
397 ip->iso_frame_desc[i].length = size;
398 }
399
400 return ip;
401 }
402
usbtv_stop(struct usbtv * usbtv)403 static void usbtv_stop(struct usbtv *usbtv)
404 {
405 int i;
406 unsigned long flags;
407
408 /* Cancel running transfers. */
409 for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) {
410 struct urb *ip = usbtv->isoc_urbs[i];
411
412 if (ip == NULL)
413 continue;
414 usb_kill_urb(ip);
415 kfree(ip->transfer_buffer);
416 usb_free_urb(ip);
417 usbtv->isoc_urbs[i] = NULL;
418 }
419
420 /* Return buffers to userspace. */
421 spin_lock_irqsave(&usbtv->buflock, flags);
422 while (!list_empty(&usbtv->bufs)) {
423 struct usbtv_buf *buf = list_first_entry(&usbtv->bufs,
424 struct usbtv_buf, list);
425 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
426 list_del(&buf->list);
427 }
428 spin_unlock_irqrestore(&usbtv->buflock, flags);
429 }
430
usbtv_start(struct usbtv * usbtv)431 static int usbtv_start(struct usbtv *usbtv)
432 {
433 int i;
434 int ret;
435
436 usbtv_audio_suspend(usbtv);
437
438 ret = usb_set_interface(usbtv->udev, 0, 0);
439 if (ret < 0)
440 return ret;
441
442 ret = usbtv_setup_capture(usbtv);
443 if (ret < 0)
444 return ret;
445
446 ret = usb_set_interface(usbtv->udev, 0, 1);
447 if (ret < 0)
448 return ret;
449
450 usbtv_audio_resume(usbtv);
451
452 for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) {
453 struct urb *ip;
454
455 ip = usbtv_setup_iso_transfer(usbtv);
456 if (ip == NULL) {
457 ret = -ENOMEM;
458 goto start_fail;
459 }
460 usbtv->isoc_urbs[i] = ip;
461
462 ret = usb_submit_urb(ip, GFP_KERNEL);
463 if (ret < 0)
464 goto start_fail;
465 }
466
467 return 0;
468
469 start_fail:
470 usbtv_stop(usbtv);
471 return ret;
472 }
473
usbtv_querycap(struct file * file,void * priv,struct v4l2_capability * cap)474 static int usbtv_querycap(struct file *file, void *priv,
475 struct v4l2_capability *cap)
476 {
477 struct usbtv *dev = video_drvdata(file);
478
479 strlcpy(cap->driver, "usbtv", sizeof(cap->driver));
480 strlcpy(cap->card, "usbtv", sizeof(cap->card));
481 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
482 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE;
483 cap->device_caps |= V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
484 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
485 return 0;
486 }
487
usbtv_enum_input(struct file * file,void * priv,struct v4l2_input * i)488 static int usbtv_enum_input(struct file *file, void *priv,
489 struct v4l2_input *i)
490 {
491 struct usbtv *dev = video_drvdata(file);
492
493 switch (i->index) {
494 case USBTV_COMPOSITE_INPUT:
495 strlcpy(i->name, "Composite", sizeof(i->name));
496 break;
497 case USBTV_SVIDEO_INPUT:
498 strlcpy(i->name, "S-Video", sizeof(i->name));
499 break;
500 default:
501 return -EINVAL;
502 }
503
504 i->type = V4L2_INPUT_TYPE_CAMERA;
505 i->std = dev->vdev.tvnorms;
506 return 0;
507 }
508
usbtv_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)509 static int usbtv_enum_fmt_vid_cap(struct file *file, void *priv,
510 struct v4l2_fmtdesc *f)
511 {
512 if (f->index > 0)
513 return -EINVAL;
514
515 strlcpy(f->description, "16 bpp YUY2, 4:2:2, packed",
516 sizeof(f->description));
517 f->pixelformat = V4L2_PIX_FMT_YUYV;
518 return 0;
519 }
520
usbtv_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)521 static int usbtv_fmt_vid_cap(struct file *file, void *priv,
522 struct v4l2_format *f)
523 {
524 struct usbtv *usbtv = video_drvdata(file);
525
526 f->fmt.pix.width = usbtv->width;
527 f->fmt.pix.height = usbtv->height;
528 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
529 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
530 f->fmt.pix.bytesperline = usbtv->width * 2;
531 f->fmt.pix.sizeimage = (f->fmt.pix.bytesperline * f->fmt.pix.height);
532 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
533
534 return 0;
535 }
536
usbtv_g_std(struct file * file,void * priv,v4l2_std_id * norm)537 static int usbtv_g_std(struct file *file, void *priv, v4l2_std_id *norm)
538 {
539 struct usbtv *usbtv = video_drvdata(file);
540 *norm = usbtv->norm;
541 return 0;
542 }
543
usbtv_s_std(struct file * file,void * priv,v4l2_std_id norm)544 static int usbtv_s_std(struct file *file, void *priv, v4l2_std_id norm)
545 {
546 int ret = -EINVAL;
547 struct usbtv *usbtv = video_drvdata(file);
548
549 if ((norm & V4L2_STD_525_60) || (norm & V4L2_STD_PAL))
550 ret = usbtv_select_norm(usbtv, norm);
551
552 return ret;
553 }
554
usbtv_g_input(struct file * file,void * priv,unsigned int * i)555 static int usbtv_g_input(struct file *file, void *priv, unsigned int *i)
556 {
557 struct usbtv *usbtv = video_drvdata(file);
558 *i = usbtv->input;
559 return 0;
560 }
561
usbtv_s_input(struct file * file,void * priv,unsigned int i)562 static int usbtv_s_input(struct file *file, void *priv, unsigned int i)
563 {
564 struct usbtv *usbtv = video_drvdata(file);
565
566 return usbtv_select_input(usbtv, i);
567 }
568
569 static struct v4l2_ioctl_ops usbtv_ioctl_ops = {
570 .vidioc_querycap = usbtv_querycap,
571 .vidioc_enum_input = usbtv_enum_input,
572 .vidioc_enum_fmt_vid_cap = usbtv_enum_fmt_vid_cap,
573 .vidioc_g_fmt_vid_cap = usbtv_fmt_vid_cap,
574 .vidioc_try_fmt_vid_cap = usbtv_fmt_vid_cap,
575 .vidioc_s_fmt_vid_cap = usbtv_fmt_vid_cap,
576 .vidioc_g_std = usbtv_g_std,
577 .vidioc_s_std = usbtv_s_std,
578 .vidioc_g_input = usbtv_g_input,
579 .vidioc_s_input = usbtv_s_input,
580
581 .vidioc_reqbufs = vb2_ioctl_reqbufs,
582 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
583 .vidioc_querybuf = vb2_ioctl_querybuf,
584 .vidioc_create_bufs = vb2_ioctl_create_bufs,
585 .vidioc_qbuf = vb2_ioctl_qbuf,
586 .vidioc_dqbuf = vb2_ioctl_dqbuf,
587 .vidioc_streamon = vb2_ioctl_streamon,
588 .vidioc_streamoff = vb2_ioctl_streamoff,
589 };
590
591 static struct v4l2_file_operations usbtv_fops = {
592 .owner = THIS_MODULE,
593 .unlocked_ioctl = video_ioctl2,
594 .mmap = vb2_fop_mmap,
595 .open = v4l2_fh_open,
596 .release = vb2_fop_release,
597 .read = vb2_fop_read,
598 .poll = vb2_fop_poll,
599 };
600
usbtv_queue_setup(struct vb2_queue * vq,const void * parg,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],void * alloc_ctxs[])601 static int usbtv_queue_setup(struct vb2_queue *vq,
602 const void *parg, unsigned int *nbuffers,
603 unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
604 {
605 const struct v4l2_format *fmt = parg;
606 struct usbtv *usbtv = vb2_get_drv_priv(vq);
607 unsigned size = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32);
608
609 if (vq->num_buffers + *nbuffers < 2)
610 *nbuffers = 2 - vq->num_buffers;
611 *nplanes = 1;
612 if (fmt && fmt->fmt.pix.sizeimage < size)
613 return -EINVAL;
614 sizes[0] = fmt ? fmt->fmt.pix.sizeimage : size;
615
616 return 0;
617 }
618
usbtv_buf_queue(struct vb2_buffer * vb)619 static void usbtv_buf_queue(struct vb2_buffer *vb)
620 {
621 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
622 struct usbtv *usbtv = vb2_get_drv_priv(vb->vb2_queue);
623 struct usbtv_buf *buf = container_of(vbuf, struct usbtv_buf, vb);
624 unsigned long flags;
625
626 if (usbtv->udev == NULL) {
627 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
628 return;
629 }
630
631 spin_lock_irqsave(&usbtv->buflock, flags);
632 list_add_tail(&buf->list, &usbtv->bufs);
633 spin_unlock_irqrestore(&usbtv->buflock, flags);
634 }
635
usbtv_start_streaming(struct vb2_queue * vq,unsigned int count)636 static int usbtv_start_streaming(struct vb2_queue *vq, unsigned int count)
637 {
638 struct usbtv *usbtv = vb2_get_drv_priv(vq);
639
640 if (usbtv->udev == NULL)
641 return -ENODEV;
642
643 usbtv->sequence = 0;
644 return usbtv_start(usbtv);
645 }
646
usbtv_stop_streaming(struct vb2_queue * vq)647 static void usbtv_stop_streaming(struct vb2_queue *vq)
648 {
649 struct usbtv *usbtv = vb2_get_drv_priv(vq);
650
651 if (usbtv->udev)
652 usbtv_stop(usbtv);
653 }
654
655 static struct vb2_ops usbtv_vb2_ops = {
656 .queue_setup = usbtv_queue_setup,
657 .buf_queue = usbtv_buf_queue,
658 .start_streaming = usbtv_start_streaming,
659 .stop_streaming = usbtv_stop_streaming,
660 };
661
usbtv_release(struct v4l2_device * v4l2_dev)662 static void usbtv_release(struct v4l2_device *v4l2_dev)
663 {
664 struct usbtv *usbtv = container_of(v4l2_dev, struct usbtv, v4l2_dev);
665
666 v4l2_device_unregister(&usbtv->v4l2_dev);
667 vb2_queue_release(&usbtv->vb2q);
668 kfree(usbtv);
669 }
670
usbtv_video_init(struct usbtv * usbtv)671 int usbtv_video_init(struct usbtv *usbtv)
672 {
673 int ret;
674
675 (void)usbtv_configure_for_norm(usbtv, V4L2_STD_525_60);
676
677 spin_lock_init(&usbtv->buflock);
678 mutex_init(&usbtv->v4l2_lock);
679 mutex_init(&usbtv->vb2q_lock);
680 INIT_LIST_HEAD(&usbtv->bufs);
681
682 /* videobuf2 structure */
683 usbtv->vb2q.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
684 usbtv->vb2q.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
685 usbtv->vb2q.drv_priv = usbtv;
686 usbtv->vb2q.buf_struct_size = sizeof(struct usbtv_buf);
687 usbtv->vb2q.ops = &usbtv_vb2_ops;
688 usbtv->vb2q.mem_ops = &vb2_vmalloc_memops;
689 usbtv->vb2q.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
690 usbtv->vb2q.lock = &usbtv->vb2q_lock;
691 ret = vb2_queue_init(&usbtv->vb2q);
692 if (ret < 0) {
693 dev_warn(usbtv->dev, "Could not initialize videobuf2 queue\n");
694 return ret;
695 }
696
697 /* v4l2 structure */
698 usbtv->v4l2_dev.release = usbtv_release;
699 ret = v4l2_device_register(usbtv->dev, &usbtv->v4l2_dev);
700 if (ret < 0) {
701 dev_warn(usbtv->dev, "Could not register v4l2 device\n");
702 goto v4l2_fail;
703 }
704
705 /* Video structure */
706 strlcpy(usbtv->vdev.name, "usbtv", sizeof(usbtv->vdev.name));
707 usbtv->vdev.v4l2_dev = &usbtv->v4l2_dev;
708 usbtv->vdev.release = video_device_release_empty;
709 usbtv->vdev.fops = &usbtv_fops;
710 usbtv->vdev.ioctl_ops = &usbtv_ioctl_ops;
711 usbtv->vdev.tvnorms = USBTV_TV_STD;
712 usbtv->vdev.queue = &usbtv->vb2q;
713 usbtv->vdev.lock = &usbtv->v4l2_lock;
714 video_set_drvdata(&usbtv->vdev, usbtv);
715 ret = video_register_device(&usbtv->vdev, VFL_TYPE_GRABBER, -1);
716 if (ret < 0) {
717 dev_warn(usbtv->dev, "Could not register video device\n");
718 goto vdev_fail;
719 }
720
721 return 0;
722
723 vdev_fail:
724 v4l2_device_unregister(&usbtv->v4l2_dev);
725 v4l2_fail:
726 vb2_queue_release(&usbtv->vb2q);
727
728 return ret;
729 }
730
usbtv_video_free(struct usbtv * usbtv)731 void usbtv_video_free(struct usbtv *usbtv)
732 {
733 mutex_lock(&usbtv->vb2q_lock);
734 mutex_lock(&usbtv->v4l2_lock);
735
736 usbtv_stop(usbtv);
737 video_unregister_device(&usbtv->vdev);
738 v4l2_device_disconnect(&usbtv->v4l2_dev);
739
740 mutex_unlock(&usbtv->v4l2_lock);
741 mutex_unlock(&usbtv->vb2q_lock);
742
743 v4l2_device_put(&usbtv->v4l2_dev);
744 }
745