drivers/media/usb/usbtv/usbtv-video.c

   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-core.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
  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
  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
 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
 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. */
 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. */
 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, 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, 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.v4l2_buf.field = V4L2_FIELD_INTERLACED;
 324                 buf->vb.v4l2_buf.sequence = usbtv->sequence++;
 325                 v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
 326                 vb2_set_plane_payload(&buf->vb, 0, size);
 327                 vb2_buffer_done(&buf->vb, 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. */
 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
 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
 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_STATE_ERROR);
 426                 list_del(&buf->list);
 427         }
 428         spin_unlock_irqrestore(&usbtv->buflock, flags);
 429 }
 430
 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
 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
 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
 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
 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
 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
 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
 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
 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
 601 static int usbtv_queue_setup(struct vb2_queue *vq,
 602         const struct v4l2_format *fmt, unsigned int *nbuffers,
 603         unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
 604 {
 605         struct usbtv *usbtv = vb2_get_drv_priv(vq);
 606         unsigned size = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32);
 607
 608         if (vq->num_buffers + *nbuffers < 2)
 609                 *nbuffers = 2 - vq->num_buffers;
 610         *nplanes = 1;
 611         if (fmt && fmt->fmt.pix.sizeimage < size)
 612                 return -EINVAL;
 613         sizes[0] = fmt ? fmt->fmt.pix.sizeimage : size;
 614
 615         return 0;
 616 }
 617
 618 static void usbtv_buf_queue(struct vb2_buffer *vb)
 619 {
 620         struct usbtv *usbtv = vb2_get_drv_priv(vb->vb2_queue);
 621         struct usbtv_buf *buf = container_of(vb, struct usbtv_buf, vb);
 622         unsigned long flags;
 623
 624         if (usbtv->udev == NULL) {
 625                 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 626                 return;
 627         }
 628
 629         spin_lock_irqsave(&usbtv->buflock, flags);
 630         list_add_tail(&buf->list, &usbtv->bufs);
 631         spin_unlock_irqrestore(&usbtv->buflock, flags);
 632 }
 633
 634 static int usbtv_start_streaming(struct vb2_queue *vq, unsigned int count)
 635 {
 636         struct usbtv *usbtv = vb2_get_drv_priv(vq);
 637
 638         if (usbtv->udev == NULL)
 639                 return -ENODEV;
 640
 641         usbtv->sequence = 0;
 642         return usbtv_start(usbtv);
 643 }
 644
 645 static void usbtv_stop_streaming(struct vb2_queue *vq)
 646 {
 647         struct usbtv *usbtv = vb2_get_drv_priv(vq);
 648
 649         if (usbtv->udev)
 650                 usbtv_stop(usbtv);
 651 }
 652
 653 static struct vb2_ops usbtv_vb2_ops = {
 654         .queue_setup = usbtv_queue_setup,
 655         .buf_queue = usbtv_buf_queue,
 656         .start_streaming = usbtv_start_streaming,
 657         .stop_streaming = usbtv_stop_streaming,
 658 };
 659
 660 static void usbtv_release(struct v4l2_device *v4l2_dev)
 661 {
 662         struct usbtv *usbtv = container_of(v4l2_dev, struct usbtv, v4l2_dev);
 663
 664         v4l2_device_unregister(&usbtv->v4l2_dev);
 665         vb2_queue_release(&usbtv->vb2q);
 666         kfree(usbtv);
 667 }
 668
 669 int usbtv_video_init(struct usbtv *usbtv)
 670 {
 671         int ret;
 672
 673         (void)usbtv_configure_for_norm(usbtv, V4L2_STD_525_60);
 674
 675         spin_lock_init(&usbtv->buflock);
 676         mutex_init(&usbtv->v4l2_lock);
 677         mutex_init(&usbtv->vb2q_lock);
 678         INIT_LIST_HEAD(&usbtv->bufs);
 679
 680         /* videobuf2 structure */
 681         usbtv->vb2q.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 682         usbtv->vb2q.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
 683         usbtv->vb2q.drv_priv = usbtv;
 684         usbtv->vb2q.buf_struct_size = sizeof(struct usbtv_buf);
 685         usbtv->vb2q.ops = &usbtv_vb2_ops;
 686         usbtv->vb2q.mem_ops = &vb2_vmalloc_memops;
 687         usbtv->vb2q.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 688         usbtv->vb2q.lock = &usbtv->vb2q_lock;
 689         ret = vb2_queue_init(&usbtv->vb2q);
 690         if (ret < 0) {
 691                 dev_warn(usbtv->dev, "Could not initialize videobuf2 queue\n");
 692                 return ret;
 693         }
 694
 695         /* v4l2 structure */
 696         usbtv->v4l2_dev.release = usbtv_release;
 697         ret = v4l2_device_register(usbtv->dev, &usbtv->v4l2_dev);
 698         if (ret < 0) {
 699                 dev_warn(usbtv->dev, "Could not register v4l2 device\n");
 700                 goto v4l2_fail;
 701         }
 702
 703         /* Video structure */
 704         strlcpy(usbtv->vdev.name, "usbtv", sizeof(usbtv->vdev.name));
 705         usbtv->vdev.v4l2_dev = &usbtv->v4l2_dev;
 706         usbtv->vdev.release = video_device_release_empty;
 707         usbtv->vdev.fops = &usbtv_fops;
 708         usbtv->vdev.ioctl_ops = &usbtv_ioctl_ops;
 709         usbtv->vdev.tvnorms = USBTV_TV_STD;
 710         usbtv->vdev.queue = &usbtv->vb2q;
 711         usbtv->vdev.lock = &usbtv->v4l2_lock;
 712         video_set_drvdata(&usbtv->vdev, usbtv);
 713         ret = video_register_device(&usbtv->vdev, VFL_TYPE_GRABBER, -1);
 714         if (ret < 0) {
 715                 dev_warn(usbtv->dev, "Could not register video device\n");
 716                 goto vdev_fail;
 717         }
 718
 719         return 0;
 720
 721 vdev_fail:
 722         v4l2_device_unregister(&usbtv->v4l2_dev);
 723 v4l2_fail:
 724         vb2_queue_release(&usbtv->vb2q);
 725
 726         return ret;
 727 }
 728
 729 void usbtv_video_free(struct usbtv *usbtv)
 730 {
 731         mutex_lock(&usbtv->vb2q_lock);
 732         mutex_lock(&usbtv->v4l2_lock);
 733
 734         usbtv_stop(usbtv);
 735         video_unregister_device(&usbtv->vdev);
 736         v4l2_device_disconnect(&usbtv->v4l2_dev);
 737
 738         mutex_unlock(&usbtv->v4l2_lock);
 739         mutex_unlock(&usbtv->vb2q_lock);
 740
 741         v4l2_device_put(&usbtv->v4l2_dev);
 742 }