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31#include <linux/init.h>
32#include <linux/list.h>
33#include <linux/module.h>
34#include <linux/slab.h>
35#include <linux/usb.h>
36#include <linux/videodev2.h>
37
38#include <media/v4l2-device.h>
39#include <media/v4l2-ioctl.h>
40#include <media/videobuf2-core.h>
41#include <media/videobuf2-vmalloc.h>
42
43
44#define USBTV_VIDEO_ENDP 0x81
45#define USBTV_BASE 0xc000
46#define USBTV_REQUEST_REG 12
47
48
49
50#define USBTV_ISOC_TRANSFERS 16
51#define USBTV_ISOC_PACKETS 8
52
53#define USBTV_WIDTH 720
54#define USBTV_HEIGHT 480
55
56#define USBTV_CHUNK_SIZE 256
57#define USBTV_CHUNK 240
58#define USBTV_CHUNKS (USBTV_WIDTH * USBTV_HEIGHT \
59 / 4 / USBTV_CHUNK)
60
61
62#define USBTV_MAGIC_OK(chunk) ((be32_to_cpu(chunk[0]) & 0xff000000) \
63 == 0x88000000)
64#define USBTV_FRAME_ID(chunk) ((be32_to_cpu(chunk[0]) & 0x00ff0000) >> 16)
65#define USBTV_ODD(chunk) ((be32_to_cpu(chunk[0]) & 0x0000f000) >> 15)
66#define USBTV_CHUNK_NO(chunk) (be32_to_cpu(chunk[0]) & 0x00000fff)
67
68
69struct usbtv_buf {
70 struct vb2_buffer vb;
71 struct list_head list;
72};
73
74
75struct usbtv {
76 struct device *dev;
77 struct usb_device *udev;
78 struct v4l2_device v4l2_dev;
79 struct video_device vdev;
80 struct vb2_queue vb2q;
81 struct mutex v4l2_lock;
82 struct mutex vb2q_lock;
83
84
85 spinlock_t buflock;
86 struct list_head bufs;
87
88
89
90 u32 frame_id;
91 int chunks_done;
92
93 enum {
94 USBTV_COMPOSITE_INPUT,
95 USBTV_SVIDEO_INPUT,
96 } input;
97 int iso_size;
98 unsigned int sequence;
99 struct urb *isoc_urbs[USBTV_ISOC_TRANSFERS];
100};
101
102static int usbtv_set_regs(struct usbtv *usbtv, const u16 regs[][2], int size)
103{
104 int ret;
105 int pipe = usb_rcvctrlpipe(usbtv->udev, 0);
106 int i;
107
108 for (i = 0; i < size; i++) {
109 u16 index = regs[i][0];
110 u16 value = regs[i][1];
111
112 ret = usb_control_msg(usbtv->udev, pipe, USBTV_REQUEST_REG,
113 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
114 value, index, NULL, 0, 0);
115 if (ret < 0)
116 return ret;
117 }
118
119 return 0;
120}
121
122static int usbtv_select_input(struct usbtv *usbtv, int input)
123{
124 int ret;
125
126 static const u16 composite[][2] = {
127 { USBTV_BASE + 0x0105, 0x0060 },
128 { USBTV_BASE + 0x011f, 0x00f2 },
129 { USBTV_BASE + 0x0127, 0x0060 },
130 { USBTV_BASE + 0x00ae, 0x0010 },
131 { USBTV_BASE + 0x0284, 0x00aa },
132 { USBTV_BASE + 0x0239, 0x0060 },
133 };
134
135 static const u16 svideo[][2] = {
136 { USBTV_BASE + 0x0105, 0x0010 },
137 { USBTV_BASE + 0x011f, 0x00ff },
138 { USBTV_BASE + 0x0127, 0x0060 },
139 { USBTV_BASE + 0x00ae, 0x0030 },
140 { USBTV_BASE + 0x0284, 0x0088 },
141 { USBTV_BASE + 0x0239, 0x0060 },
142 };
143
144 switch (input) {
145 case USBTV_COMPOSITE_INPUT:
146 ret = usbtv_set_regs(usbtv, composite, ARRAY_SIZE(composite));
147 break;
148 case USBTV_SVIDEO_INPUT:
149 ret = usbtv_set_regs(usbtv, svideo, ARRAY_SIZE(svideo));
150 break;
151 default:
152 ret = -EINVAL;
153 }
154
155 if (!ret)
156 usbtv->input = input;
157
158 return ret;
159}
160
161static int usbtv_setup_capture(struct usbtv *usbtv)
162{
163 int ret;
164 static const u16 setup[][2] = {
165
166 { USBTV_BASE + 0x0008, 0x0001 },
167 { USBTV_BASE + 0x01d0, 0x00ff },
168 { USBTV_BASE + 0x01d9, 0x0002 },
169
170
171
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 + 0x0284, 0x0088 },
227 { USBTV_BASE + 0x0003, 0x0004 },
228 { USBTV_BASE + 0x001a, 0x0079 },
229 { USBTV_BASE + 0x0100, 0x00d3 },
230 { USBTV_BASE + 0x010e, 0x0068 },
231 { USBTV_BASE + 0x010f, 0x009c },
232 { USBTV_BASE + 0x0112, 0x00f0 },
233 { USBTV_BASE + 0x0115, 0x0015 },
234 { USBTV_BASE + 0x0117, 0x0000 },
235 { USBTV_BASE + 0x0118, 0x00fc },
236 { USBTV_BASE + 0x012d, 0x0004 },
237 { USBTV_BASE + 0x012f, 0x0008 },
238 { USBTV_BASE + 0x0220, 0x002e },
239 { USBTV_BASE + 0x0225, 0x0008 },
240 { USBTV_BASE + 0x024e, 0x0002 },
241 { USBTV_BASE + 0x024f, 0x0001 },
242 { USBTV_BASE + 0x0254, 0x005f },
243 { USBTV_BASE + 0x025a, 0x0012 },
244 { USBTV_BASE + 0x025b, 0x0001 },
245 { USBTV_BASE + 0x0263, 0x001c },
246 { USBTV_BASE + 0x0266, 0x0011 },
247 { USBTV_BASE + 0x0267, 0x0005 },
248 { USBTV_BASE + 0x024e, 0x0002 },
249 { USBTV_BASE + 0x024f, 0x0002 },
250 };
251
252 ret = usbtv_set_regs(usbtv, setup, ARRAY_SIZE(setup));
253 if (ret)
254 return ret;
255
256 ret = usbtv_select_input(usbtv, usbtv->input);
257 if (ret)
258 return ret;
259
260 return 0;
261}
262
263
264
265
266
267
268static void usbtv_chunk_to_vbuf(u32 *frame, u32 *src, int chunk_no, int odd)
269{
270 int half;
271
272 for (half = 0; half < 2; half++) {
273 int part_no = chunk_no * 2 + half;
274 int line = part_no / 3;
275 int part_index = (line * 2 + !odd) * 3 + (part_no % 3);
276
277 u32 *dst = &frame[part_index * USBTV_CHUNK/2];
278 memcpy(dst, src, USBTV_CHUNK/2 * sizeof(*src));
279 src += USBTV_CHUNK/2;
280 }
281}
282
283
284
285
286static void usbtv_image_chunk(struct usbtv *usbtv, u32 *chunk)
287{
288 int frame_id, odd, chunk_no;
289 u32 *frame;
290 struct usbtv_buf *buf;
291 unsigned long flags;
292
293
294 if (!USBTV_MAGIC_OK(chunk))
295 return;
296 frame_id = USBTV_FRAME_ID(chunk);
297 odd = USBTV_ODD(chunk);
298 chunk_no = USBTV_CHUNK_NO(chunk);
299 if (chunk_no >= USBTV_CHUNKS)
300 return;
301
302
303 if (chunk_no == 0) {
304 usbtv->frame_id = frame_id;
305 usbtv->chunks_done = 0;
306 }
307
308 if (usbtv->frame_id != frame_id)
309 return;
310
311 spin_lock_irqsave(&usbtv->buflock, flags);
312 if (list_empty(&usbtv->bufs)) {
313
314 spin_unlock_irqrestore(&usbtv->buflock, flags);
315 return;
316 }
317
318
319 buf = list_first_entry(&usbtv->bufs, struct usbtv_buf, list);
320 frame = vb2_plane_vaddr(&buf->vb, 0);
321
322
323 usbtv_chunk_to_vbuf(frame, &chunk[1], chunk_no, odd);
324 usbtv->chunks_done++;
325
326
327 if (odd && chunk_no == USBTV_CHUNKS-1) {
328 int size = vb2_plane_size(&buf->vb, 0);
329 enum vb2_buffer_state state = usbtv->chunks_done ==
330 USBTV_CHUNKS ?
331 VB2_BUF_STATE_DONE :
332 VB2_BUF_STATE_ERROR;
333
334 buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED;
335 buf->vb.v4l2_buf.sequence = usbtv->sequence++;
336 v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
337 vb2_set_plane_payload(&buf->vb, 0, size);
338 vb2_buffer_done(&buf->vb, state);
339 list_del(&buf->list);
340 }
341
342 spin_unlock_irqrestore(&usbtv->buflock, flags);
343}
344
345
346
347static void usbtv_iso_cb(struct urb *ip)
348{
349 int ret;
350 int i;
351 struct usbtv *usbtv = (struct usbtv *)ip->context;
352
353 switch (ip->status) {
354
355 case 0:
356 break;
357
358 case -ENODEV:
359 case -ENOENT:
360 case -ECONNRESET:
361 case -ESHUTDOWN:
362 return;
363
364 default:
365 dev_warn(usbtv->dev, "Bad response for ISO request.\n");
366 goto resubmit;
367 }
368
369 for (i = 0; i < ip->number_of_packets; i++) {
370 int size = ip->iso_frame_desc[i].actual_length;
371 unsigned char *data = ip->transfer_buffer +
372 ip->iso_frame_desc[i].offset;
373 int offset;
374
375 for (offset = 0; USBTV_CHUNK_SIZE * offset < size; offset++)
376 usbtv_image_chunk(usbtv,
377 (u32 *)&data[USBTV_CHUNK_SIZE * offset]);
378 }
379
380resubmit:
381 ret = usb_submit_urb(ip, GFP_ATOMIC);
382 if (ret < 0)
383 dev_warn(usbtv->dev, "Could not resubmit ISO URB\n");
384}
385
386static struct urb *usbtv_setup_iso_transfer(struct usbtv *usbtv)
387{
388 struct urb *ip;
389 int size = usbtv->iso_size;
390 int i;
391
392 ip = usb_alloc_urb(USBTV_ISOC_PACKETS, GFP_KERNEL);
393 if (ip == NULL)
394 return NULL;
395
396 ip->dev = usbtv->udev;
397 ip->context = usbtv;
398 ip->pipe = usb_rcvisocpipe(usbtv->udev, USBTV_VIDEO_ENDP);
399 ip->interval = 1;
400 ip->transfer_flags = URB_ISO_ASAP;
401 ip->transfer_buffer = kzalloc(size * USBTV_ISOC_PACKETS,
402 GFP_KERNEL);
403 ip->complete = usbtv_iso_cb;
404 ip->number_of_packets = USBTV_ISOC_PACKETS;
405 ip->transfer_buffer_length = size * USBTV_ISOC_PACKETS;
406 for (i = 0; i < USBTV_ISOC_PACKETS; i++) {
407 ip->iso_frame_desc[i].offset = size * i;
408 ip->iso_frame_desc[i].length = size;
409 }
410
411 return ip;
412}
413
414static void usbtv_stop(struct usbtv *usbtv)
415{
416 int i;
417 unsigned long flags;
418
419
420 for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) {
421 struct urb *ip = usbtv->isoc_urbs[i];
422 if (ip == NULL)
423 continue;
424 usb_kill_urb(ip);
425 kfree(ip->transfer_buffer);
426 usb_free_urb(ip);
427 usbtv->isoc_urbs[i] = NULL;
428 }
429
430
431 spin_lock_irqsave(&usbtv->buflock, flags);
432 while (!list_empty(&usbtv->bufs)) {
433 struct usbtv_buf *buf = list_first_entry(&usbtv->bufs,
434 struct usbtv_buf, list);
435 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
436 list_del(&buf->list);
437 }
438 spin_unlock_irqrestore(&usbtv->buflock, flags);
439}
440
441static int usbtv_start(struct usbtv *usbtv)
442{
443 int i;
444 int ret;
445
446 ret = usb_set_interface(usbtv->udev, 0, 0);
447 if (ret < 0)
448 return ret;
449
450 ret = usbtv_setup_capture(usbtv);
451 if (ret < 0)
452 return ret;
453
454 ret = usb_set_interface(usbtv->udev, 0, 1);
455 if (ret < 0)
456 return ret;
457
458 for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) {
459 struct urb *ip;
460
461 ip = usbtv_setup_iso_transfer(usbtv);
462 if (ip == NULL) {
463 ret = -ENOMEM;
464 goto start_fail;
465 }
466 usbtv->isoc_urbs[i] = ip;
467
468 ret = usb_submit_urb(ip, GFP_KERNEL);
469 if (ret < 0)
470 goto start_fail;
471 }
472
473 return 0;
474
475start_fail:
476 usbtv_stop(usbtv);
477 return ret;
478}
479
480struct usb_device_id usbtv_id_table[] = {
481 { USB_DEVICE(0x1b71, 0x3002) },
482 {}
483};
484MODULE_DEVICE_TABLE(usb, usbtv_id_table);
485
486static int usbtv_querycap(struct file *file, void *priv,
487 struct v4l2_capability *cap)
488{
489 struct usbtv *dev = video_drvdata(file);
490
491 strlcpy(cap->driver, "usbtv", sizeof(cap->driver));
492 strlcpy(cap->card, "usbtv", sizeof(cap->card));
493 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
494 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE;
495 cap->device_caps |= V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
496 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
497 return 0;
498}
499
500static int usbtv_enum_input(struct file *file, void *priv,
501 struct v4l2_input *i)
502{
503 switch (i->index) {
504 case USBTV_COMPOSITE_INPUT:
505 strlcpy(i->name, "Composite", sizeof(i->name));
506 break;
507 case USBTV_SVIDEO_INPUT:
508 strlcpy(i->name, "S-Video", sizeof(i->name));
509 break;
510 default:
511 return -EINVAL;
512 }
513
514 i->type = V4L2_INPUT_TYPE_CAMERA;
515 i->std = V4L2_STD_525_60;
516 return 0;
517}
518
519static int usbtv_enum_fmt_vid_cap(struct file *file, void *priv,
520 struct v4l2_fmtdesc *f)
521{
522 if (f->index > 0)
523 return -EINVAL;
524
525 strlcpy(f->description, "16 bpp YUY2, 4:2:2, packed",
526 sizeof(f->description));
527 f->pixelformat = V4L2_PIX_FMT_YUYV;
528 return 0;
529}
530
531static int usbtv_fmt_vid_cap(struct file *file, void *priv,
532 struct v4l2_format *f)
533{
534 f->fmt.pix.width = USBTV_WIDTH;
535 f->fmt.pix.height = USBTV_HEIGHT;
536 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
537 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
538 f->fmt.pix.bytesperline = USBTV_WIDTH * 2;
539 f->fmt.pix.sizeimage = (f->fmt.pix.bytesperline * f->fmt.pix.height);
540 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
541 f->fmt.pix.priv = 0;
542 return 0;
543}
544
545static int usbtv_g_std(struct file *file, void *priv, v4l2_std_id *norm)
546{
547 *norm = V4L2_STD_525_60;
548 return 0;
549}
550
551static int usbtv_g_input(struct file *file, void *priv, unsigned int *i)
552{
553 struct usbtv *usbtv = video_drvdata(file);
554 *i = usbtv->input;
555 return 0;
556}
557
558static int usbtv_s_input(struct file *file, void *priv, unsigned int i)
559{
560 struct usbtv *usbtv = video_drvdata(file);
561 return usbtv_select_input(usbtv, i);
562}
563
564static int usbtv_s_std(struct file *file, void *priv, v4l2_std_id norm)
565{
566 if (norm & V4L2_STD_525_60)
567 return 0;
568 return -EINVAL;
569}
570
571struct v4l2_ioctl_ops usbtv_ioctl_ops = {
572 .vidioc_querycap = usbtv_querycap,
573 .vidioc_enum_input = usbtv_enum_input,
574 .vidioc_enum_fmt_vid_cap = usbtv_enum_fmt_vid_cap,
575 .vidioc_g_fmt_vid_cap = usbtv_fmt_vid_cap,
576 .vidioc_try_fmt_vid_cap = usbtv_fmt_vid_cap,
577 .vidioc_s_fmt_vid_cap = usbtv_fmt_vid_cap,
578 .vidioc_g_std = usbtv_g_std,
579 .vidioc_s_std = usbtv_s_std,
580 .vidioc_g_input = usbtv_g_input,
581 .vidioc_s_input = usbtv_s_input,
582
583 .vidioc_reqbufs = vb2_ioctl_reqbufs,
584 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
585 .vidioc_querybuf = vb2_ioctl_querybuf,
586 .vidioc_create_bufs = vb2_ioctl_create_bufs,
587 .vidioc_qbuf = vb2_ioctl_qbuf,
588 .vidioc_dqbuf = vb2_ioctl_dqbuf,
589 .vidioc_streamon = vb2_ioctl_streamon,
590 .vidioc_streamoff = vb2_ioctl_streamoff,
591};
592
593struct v4l2_file_operations usbtv_fops = {
594 .owner = THIS_MODULE,
595 .unlocked_ioctl = video_ioctl2,
596 .mmap = vb2_fop_mmap,
597 .open = v4l2_fh_open,
598 .release = vb2_fop_release,
599 .read = vb2_fop_read,
600 .poll = vb2_fop_poll,
601};
602
603static int usbtv_queue_setup(struct vb2_queue *vq,
604 const struct v4l2_format *v4l_fmt, unsigned int *nbuffers,
605 unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
606{
607 if (*nbuffers < 2)
608 *nbuffers = 2;
609 *nplanes = 1;
610 sizes[0] = USBTV_WIDTH * USBTV_HEIGHT / 2 * sizeof(u32);
611
612 return 0;
613}
614
615static void usbtv_buf_queue(struct vb2_buffer *vb)
616{
617 struct usbtv *usbtv = vb2_get_drv_priv(vb->vb2_queue);
618 struct usbtv_buf *buf = container_of(vb, struct usbtv_buf, vb);
619 unsigned long flags;
620
621 if (usbtv->udev == NULL) {
622 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
623 return;
624 }
625
626 spin_lock_irqsave(&usbtv->buflock, flags);
627 list_add_tail(&buf->list, &usbtv->bufs);
628 spin_unlock_irqrestore(&usbtv->buflock, flags);
629}
630
631static int usbtv_start_streaming(struct vb2_queue *vq, unsigned int count)
632{
633 struct usbtv *usbtv = vb2_get_drv_priv(vq);
634
635 if (usbtv->udev == NULL)
636 return -ENODEV;
637
638 return usbtv_start(usbtv);
639}
640
641static int usbtv_stop_streaming(struct vb2_queue *vq)
642{
643 struct usbtv *usbtv = vb2_get_drv_priv(vq);
644
645 if (usbtv->udev == NULL)
646 return -ENODEV;
647
648 usbtv_stop(usbtv);
649 return 0;
650}
651
652struct vb2_ops usbtv_vb2_ops = {
653 .queue_setup = usbtv_queue_setup,
654 .buf_queue = usbtv_buf_queue,
655 .start_streaming = usbtv_start_streaming,
656 .stop_streaming = usbtv_stop_streaming,
657};
658
659static void usbtv_release(struct v4l2_device *v4l2_dev)
660{
661 struct usbtv *usbtv = container_of(v4l2_dev, struct usbtv, v4l2_dev);
662
663 v4l2_device_unregister(&usbtv->v4l2_dev);
664 vb2_queue_release(&usbtv->vb2q);
665 kfree(usbtv);
666}
667
668static int usbtv_probe(struct usb_interface *intf,
669 const struct usb_device_id *id)
670{
671 int ret;
672 int size;
673 struct device *dev = &intf->dev;
674 struct usbtv *usbtv;
675
676
677 if (intf->num_altsetting != 2)
678 return -ENODEV;
679 if (intf->altsetting[1].desc.bNumEndpoints != 4)
680 return -ENODEV;
681
682
683
684 size = usb_endpoint_maxp(&intf->altsetting[1].endpoint[0].desc);
685 size = (size & 0x07ff) * (((size & 0x1800) >> 11) + 1);
686
687
688 usbtv = kzalloc(sizeof(struct usbtv), GFP_KERNEL);
689 if (usbtv == NULL)
690 return -ENOMEM;
691 usbtv->dev = dev;
692 usbtv->udev = usb_get_dev(interface_to_usbdev(intf));
693 usbtv->iso_size = size;
694 spin_lock_init(&usbtv->buflock);
695 mutex_init(&usbtv->v4l2_lock);
696 mutex_init(&usbtv->vb2q_lock);
697 INIT_LIST_HEAD(&usbtv->bufs);
698
699
700 usbtv->vb2q.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
701 usbtv->vb2q.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
702 usbtv->vb2q.drv_priv = usbtv;
703 usbtv->vb2q.buf_struct_size = sizeof(struct usbtv_buf);
704 usbtv->vb2q.ops = &usbtv_vb2_ops;
705 usbtv->vb2q.mem_ops = &vb2_vmalloc_memops;
706 usbtv->vb2q.timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
707 usbtv->vb2q.lock = &usbtv->vb2q_lock;
708 ret = vb2_queue_init(&usbtv->vb2q);
709 if (ret < 0) {
710 dev_warn(dev, "Could not initialize videobuf2 queue\n");
711 goto usbtv_fail;
712 }
713
714
715 usbtv->v4l2_dev.release = usbtv_release;
716 ret = v4l2_device_register(dev, &usbtv->v4l2_dev);
717 if (ret < 0) {
718 dev_warn(dev, "Could not register v4l2 device\n");
719 goto v4l2_fail;
720 }
721
722 usb_set_intfdata(intf, usbtv);
723
724
725 strlcpy(usbtv->vdev.name, "usbtv", sizeof(usbtv->vdev.name));
726 usbtv->vdev.v4l2_dev = &usbtv->v4l2_dev;
727 usbtv->vdev.release = video_device_release_empty;
728 usbtv->vdev.fops = &usbtv_fops;
729 usbtv->vdev.ioctl_ops = &usbtv_ioctl_ops;
730 usbtv->vdev.tvnorms = V4L2_STD_525_60;
731 usbtv->vdev.queue = &usbtv->vb2q;
732 usbtv->vdev.lock = &usbtv->v4l2_lock;
733 set_bit(V4L2_FL_USE_FH_PRIO, &usbtv->vdev.flags);
734 video_set_drvdata(&usbtv->vdev, usbtv);
735 ret = video_register_device(&usbtv->vdev, VFL_TYPE_GRABBER, -1);
736 if (ret < 0) {
737 dev_warn(dev, "Could not register video device\n");
738 goto vdev_fail;
739 }
740
741 dev_info(dev, "Fushicai USBTV007 Video Grabber\n");
742 return 0;
743
744vdev_fail:
745 v4l2_device_unregister(&usbtv->v4l2_dev);
746v4l2_fail:
747 vb2_queue_release(&usbtv->vb2q);
748usbtv_fail:
749 kfree(usbtv);
750
751 return ret;
752}
753
754static void usbtv_disconnect(struct usb_interface *intf)
755{
756 struct usbtv *usbtv = usb_get_intfdata(intf);
757
758 mutex_lock(&usbtv->vb2q_lock);
759 mutex_lock(&usbtv->v4l2_lock);
760
761 usbtv_stop(usbtv);
762 usb_set_intfdata(intf, NULL);
763 video_unregister_device(&usbtv->vdev);
764 v4l2_device_disconnect(&usbtv->v4l2_dev);
765 usb_put_dev(usbtv->udev);
766 usbtv->udev = NULL;
767
768 mutex_unlock(&usbtv->v4l2_lock);
769 mutex_unlock(&usbtv->vb2q_lock);
770
771 v4l2_device_put(&usbtv->v4l2_dev);
772}
773
774MODULE_AUTHOR("Lubomir Rintel");
775MODULE_DESCRIPTION("Fushicai USBTV007 Video Grabber Driver");
776MODULE_LICENSE("Dual BSD/GPL");
777
778struct usb_driver usbtv_usb_driver = {
779 .name = "usbtv",
780 .id_table = usbtv_id_table,
781 .probe = usbtv_probe,
782 .disconnect = usbtv_disconnect,
783};
784
785module_usb_driver(usbtv_usb_driver);
786
