1 /* 2 * Copyright (c) 2013 Lubomir Rintel 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions, and the following disclaimer, 10 * without modification. 11 * 2. The name of the author may not be used to endorse or promote products 12 * derived from this software without specific prior written permission. 13 * 14 * Alternatively, this software may be distributed under the terms of the 15 * GNU General Public License ("GPL"). 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 /* 30 * Fushicai USBTV007 Audio-Video Grabber Driver 31 * 32 * Product web site: 33 * http://www.fushicai.com/products_detail/&productId=d05449ee-b690-42f9-a661-aa7353894bed.html 34 * 35 * Following LWN articles were very useful in construction of this driver: 36 * Video4Linux2 API series: http://lwn.net/Articles/203924/ 37 * videobuf2 API explanation: http://lwn.net/Articles/447435/ 38 * Thanks go to Jonathan Corbet for providing this quality documentation. 39 * He is awesome. 40 * 41 * No physical hardware was harmed running Windows during the 42 * reverse-engineering activity 43 */ 44 45 #include <media/v4l2-ioctl.h> 46 #include <media/videobuf2-v4l2.h> 47 48 #include "usbtv.h" 49 50 static struct usbtv_norm_params norm_params[] = { 51 { 52 .norm = V4L2_STD_525_60, 53 .cap_width = 720, 54 .cap_height = 480, 55 }, 56 { 57 .norm = V4L2_STD_PAL, 58 .cap_width = 720, 59 .cap_height = 576, 60 } 61 }; 62 63 static int usbtv_configure_for_norm(struct usbtv *usbtv, v4l2_std_id norm) 64 { 65 int i, ret = 0; 66 struct usbtv_norm_params *params = NULL; 67 68 for (i = 0; i < ARRAY_SIZE(norm_params); i++) { 69 if (norm_params[i].norm & norm) { 70 params = &norm_params[i]; 71 break; 72 } 73 } 74 75 if (params) { 76 usbtv->width = params->cap_width; 77 usbtv->height = params->cap_height; 78 usbtv->n_chunks = usbtv->width * usbtv->height 79 / 4 / USBTV_CHUNK; 80 usbtv->norm = params->norm; 81 } else 82 ret = -EINVAL; 83 84 return ret; 85 } 86 87 static int usbtv_select_input(struct usbtv *usbtv, int input) 88 { 89 int ret; 90 91 static const u16 composite[][2] = { 92 { USBTV_BASE + 0x0105, 0x0060 }, 93 { USBTV_BASE + 0x011f, 0x00f2 }, 94 { USBTV_BASE + 0x0127, 0x0060 }, 95 { USBTV_BASE + 0x00ae, 0x0010 }, 96 { USBTV_BASE + 0x0239, 0x0060 }, 97 }; 98 99 static const u16 svideo[][2] = { 100 { USBTV_BASE + 0x0105, 0x0010 }, 101 { USBTV_BASE + 0x011f, 0x00ff }, 102 { USBTV_BASE + 0x0127, 0x0060 }, 103 { USBTV_BASE + 0x00ae, 0x0030 }, 104 { USBTV_BASE + 0x0239, 0x0060 }, 105 }; 106 107 switch (input) { 108 case USBTV_COMPOSITE_INPUT: 109 ret = usbtv_set_regs(usbtv, composite, ARRAY_SIZE(composite)); 110 break; 111 case USBTV_SVIDEO_INPUT: 112 ret = usbtv_set_regs(usbtv, svideo, ARRAY_SIZE(svideo)); 113 break; 114 default: 115 ret = -EINVAL; 116 } 117 118 if (!ret) 119 usbtv->input = input; 120 121 return ret; 122 } 123 124 static int usbtv_select_norm(struct usbtv *usbtv, v4l2_std_id norm) 125 { 126 int ret; 127 static const u16 pal[][2] = { 128 { USBTV_BASE + 0x001a, 0x0068 }, 129 { USBTV_BASE + 0x010e, 0x0072 }, 130 { USBTV_BASE + 0x010f, 0x00a2 }, 131 { USBTV_BASE + 0x0112, 0x00b0 }, 132 { USBTV_BASE + 0x0117, 0x0001 }, 133 { USBTV_BASE + 0x0118, 0x002c }, 134 { USBTV_BASE + 0x012d, 0x0010 }, 135 { USBTV_BASE + 0x012f, 0x0020 }, 136 { USBTV_BASE + 0x024f, 0x0002 }, 137 { USBTV_BASE + 0x0254, 0x0059 }, 138 { USBTV_BASE + 0x025a, 0x0016 }, 139 { USBTV_BASE + 0x025b, 0x0035 }, 140 { USBTV_BASE + 0x0263, 0x0017 }, 141 { USBTV_BASE + 0x0266, 0x0016 }, 142 { USBTV_BASE + 0x0267, 0x0036 } 143 }; 144 145 static const u16 ntsc[][2] = { 146 { USBTV_BASE + 0x001a, 0x0079 }, 147 { USBTV_BASE + 0x010e, 0x0068 }, 148 { USBTV_BASE + 0x010f, 0x009c }, 149 { USBTV_BASE + 0x0112, 0x00f0 }, 150 { USBTV_BASE + 0x0117, 0x0000 }, 151 { USBTV_BASE + 0x0118, 0x00fc }, 152 { USBTV_BASE + 0x012d, 0x0004 }, 153 { USBTV_BASE + 0x012f, 0x0008 }, 154 { USBTV_BASE + 0x024f, 0x0001 }, 155 { USBTV_BASE + 0x0254, 0x005f }, 156 { USBTV_BASE + 0x025a, 0x0012 }, 157 { USBTV_BASE + 0x025b, 0x0001 }, 158 { USBTV_BASE + 0x0263, 0x001c }, 159 { USBTV_BASE + 0x0266, 0x0011 }, 160 { USBTV_BASE + 0x0267, 0x0005 } 161 }; 162 163 ret = usbtv_configure_for_norm(usbtv, norm); 164 165 if (!ret) { 166 if (norm & V4L2_STD_525_60) 167 ret = usbtv_set_regs(usbtv, ntsc, ARRAY_SIZE(ntsc)); 168 else if (norm & V4L2_STD_PAL) 169 ret = usbtv_set_regs(usbtv, pal, ARRAY_SIZE(pal)); 170 } 171 172 return ret; 173 } 174 175 static int usbtv_setup_capture(struct usbtv *usbtv) 176 { 177 int ret; 178 static const u16 setup[][2] = { 179 /* These seem to enable the device. */ 180 { USBTV_BASE + 0x0008, 0x0001 }, 181 { USBTV_BASE + 0x01d0, 0x00ff }, 182 { USBTV_BASE + 0x01d9, 0x0002 }, 183 184 /* These seem to influence color parameters, such as 185 * brightness, etc. */ 186 { USBTV_BASE + 0x0239, 0x0040 }, 187 { USBTV_BASE + 0x0240, 0x0000 }, 188 { USBTV_BASE + 0x0241, 0x0000 }, 189 { USBTV_BASE + 0x0242, 0x0002 }, 190 { USBTV_BASE + 0x0243, 0x0080 }, 191 { USBTV_BASE + 0x0244, 0x0012 }, 192 { USBTV_BASE + 0x0245, 0x0090 }, 193 { USBTV_BASE + 0x0246, 0x0000 }, 194 195 { USBTV_BASE + 0x0278, 0x002d }, 196 { USBTV_BASE + 0x0279, 0x000a }, 197 { USBTV_BASE + 0x027a, 0x0032 }, 198 { 0xf890, 0x000c }, 199 { 0xf894, 0x0086 }, 200 201 { USBTV_BASE + 0x00ac, 0x00c0 }, 202 { USBTV_BASE + 0x00ad, 0x0000 }, 203 { USBTV_BASE + 0x00a2, 0x0012 }, 204 { USBTV_BASE + 0x00a3, 0x00e0 }, 205 { USBTV_BASE + 0x00a4, 0x0028 }, 206 { USBTV_BASE + 0x00a5, 0x0082 }, 207 { USBTV_BASE + 0x00a7, 0x0080 }, 208 { USBTV_BASE + 0x0000, 0x0014 }, 209 { USBTV_BASE + 0x0006, 0x0003 }, 210 { USBTV_BASE + 0x0090, 0x0099 }, 211 { USBTV_BASE + 0x0091, 0x0090 }, 212 { USBTV_BASE + 0x0094, 0x0068 }, 213 { USBTV_BASE + 0x0095, 0x0070 }, 214 { USBTV_BASE + 0x009c, 0x0030 }, 215 { USBTV_BASE + 0x009d, 0x00c0 }, 216 { USBTV_BASE + 0x009e, 0x00e0 }, 217 { USBTV_BASE + 0x0019, 0x0006 }, 218 { USBTV_BASE + 0x008c, 0x00ba }, 219 { USBTV_BASE + 0x0101, 0x00ff }, 220 { USBTV_BASE + 0x010c, 0x00b3 }, 221 { USBTV_BASE + 0x01b2, 0x0080 }, 222 { USBTV_BASE + 0x01b4, 0x00a0 }, 223 { USBTV_BASE + 0x014c, 0x00ff }, 224 { USBTV_BASE + 0x014d, 0x00ca }, 225 { USBTV_BASE + 0x0113, 0x0053 }, 226 { USBTV_BASE + 0x0119, 0x008a }, 227 { USBTV_BASE + 0x013c, 0x0003 }, 228 { USBTV_BASE + 0x0150, 0x009c }, 229 { USBTV_BASE + 0x0151, 0x0071 }, 230 { USBTV_BASE + 0x0152, 0x00c6 }, 231 { USBTV_BASE + 0x0153, 0x0084 }, 232 { USBTV_BASE + 0x0154, 0x00bc }, 233 { USBTV_BASE + 0x0155, 0x00a0 }, 234 { USBTV_BASE + 0x0156, 0x00a0 }, 235 { USBTV_BASE + 0x0157, 0x009c }, 236 { USBTV_BASE + 0x0158, 0x001f }, 237 { USBTV_BASE + 0x0159, 0x0006 }, 238 { USBTV_BASE + 0x015d, 0x0000 }, 239 240 { USBTV_BASE + 0x0003, 0x0004 }, 241 { USBTV_BASE + 0x0100, 0x00d3 }, 242 { USBTV_BASE + 0x0115, 0x0015 }, 243 { USBTV_BASE + 0x0220, 0x002e }, 244 { USBTV_BASE + 0x0225, 0x0008 }, 245 { USBTV_BASE + 0x024e, 0x0002 }, 246 { USBTV_BASE + 0x024e, 0x0002 }, 247 { USBTV_BASE + 0x024f, 0x0002 }, 248 }; 249 250 ret = usbtv_set_regs(usbtv, setup, ARRAY_SIZE(setup)); 251 if (ret) 252 return ret; 253 254 ret = usbtv_select_norm(usbtv, usbtv->norm); 255 if (ret) 256 return ret; 257 258 ret = usbtv_select_input(usbtv, usbtv->input); 259 if (ret) 260 return ret; 261 262 return 0; 263 } 264 265 /* Copy data from chunk into a frame buffer, deinterlacing the data 266 * into every second line. Unfortunately, they don't align nicely into 267 * 720 pixel lines, as the chunk is 240 words long, which is 480 pixels. 268 * Therefore, we break down the chunk into two halves before copying, 269 * so that we can interleave a line if needed. 270 * 271 * Each "chunk" is 240 words; a word in this context equals 4 bytes. 272 * Image format is YUYV/YUV 4:2:2, consisting of Y Cr Y Cb, defining two 273 * pixels, the Cr and Cb shared between the two pixels, but each having 274 * separate Y values. Thus, the 240 words equal 480 pixels. It therefore, 275 * takes 1.5 chunks to make a 720 pixel-wide line for the frame. 276 * The image is interlaced, so there is a "scan" of odd lines, followed 277 * by "scan" of even numbered lines. 278 * 279 * Following code is writing the chunks in correct sequence, skipping 280 * the rows based on "odd" value. 281 * line 1: chunk[0][ 0..479] chunk[0][480..959] chunk[1][ 0..479] 282 * line 3: chunk[1][480..959] chunk[2][ 0..479] chunk[2][480..959] 283 * ...etc. 284 */ 285 static void usbtv_chunk_to_vbuf(u32 *frame, __be32 *src, int chunk_no, int odd) 286 { 287 int half; 288 289 for (half = 0; half < 2; half++) { 290 int part_no = chunk_no * 2 + half; 291 int line = part_no / 3; 292 int part_index = (line * 2 + !odd) * 3 + (part_no % 3); 293 294 u32 *dst = &frame[part_index * USBTV_CHUNK/2]; 295 296 memcpy(dst, src, USBTV_CHUNK/2 * sizeof(*src)); 297 src += USBTV_CHUNK/2; 298 } 299 } 300 301 /* Called for each 256-byte image chunk. 302 * First word identifies the chunk, followed by 240 words of image 303 * data and padding. */ 304 static void usbtv_image_chunk(struct usbtv *usbtv, __be32 *chunk) 305 { 306 int frame_id, odd, chunk_no; 307 u32 *frame; 308 struct usbtv_buf *buf; 309 unsigned long flags; 310 311 /* Ignore corrupted lines. */ 312 if (!USBTV_MAGIC_OK(chunk)) 313 return; 314 frame_id = USBTV_FRAME_ID(chunk); 315 odd = USBTV_ODD(chunk); 316 chunk_no = USBTV_CHUNK_NO(chunk); 317 if (chunk_no >= usbtv->n_chunks) 318 return; 319 320 /* Beginning of a frame. */ 321 if (chunk_no == 0) { 322 usbtv->frame_id = frame_id; 323 usbtv->chunks_done = 0; 324 } 325 326 if (usbtv->frame_id != frame_id) 327 return; 328 329 spin_lock_irqsave(&usbtv->buflock, flags); 330 if (list_empty(&usbtv->bufs)) { 331 /* No free buffers. Userspace likely too slow. */ 332 spin_unlock_irqrestore(&usbtv->buflock, flags); 333 return; 334 } 335 336 /* First available buffer. */ 337 buf = list_first_entry(&usbtv->bufs, struct usbtv_buf, list); 338 frame = vb2_plane_vaddr(&buf->vb.vb2_buf, 0); 339 340 /* Copy the chunk data. */ 341 usbtv_chunk_to_vbuf(frame, &chunk[1], chunk_no, odd); 342 usbtv->chunks_done++; 343 344 /* Last chunk in a field */ 345 if (chunk_no == usbtv->n_chunks-1) { 346 /* Last chunk in a frame, signalling an end */ 347 if (odd && !usbtv->last_odd) { 348 int size = vb2_plane_size(&buf->vb.vb2_buf, 0); 349 enum vb2_buffer_state state = usbtv->chunks_done == 350 usbtv->n_chunks ? 351 VB2_BUF_STATE_DONE : 352 VB2_BUF_STATE_ERROR; 353 354 buf->vb.field = V4L2_FIELD_INTERLACED; 355 buf->vb.sequence = usbtv->sequence++; 356 buf->vb.vb2_buf.timestamp = ktime_get_ns(); 357 vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size); 358 vb2_buffer_done(&buf->vb.vb2_buf, state); 359 list_del(&buf->list); 360 } 361 usbtv->last_odd = odd; 362 } 363 364 spin_unlock_irqrestore(&usbtv->buflock, flags); 365 } 366 367 /* Got image data. Each packet contains a number of 256-word chunks we 368 * compose the image from. */ 369 static void usbtv_iso_cb(struct urb *ip) 370 { 371 int ret; 372 int i; 373 struct usbtv *usbtv = (struct usbtv *)ip->context; 374 375 switch (ip->status) { 376 /* All fine. */ 377 case 0: 378 break; 379 /* Device disconnected or capture stopped? */ 380 case -ENODEV: 381 case -ENOENT: 382 case -ECONNRESET: 383 case -ESHUTDOWN: 384 return; 385 /* Unknown error. Retry. */ 386 default: 387 dev_warn(usbtv->dev, "Bad response for ISO request.\n"); 388 goto resubmit; 389 } 390 391 for (i = 0; i < ip->number_of_packets; i++) { 392 int size = ip->iso_frame_desc[i].actual_length; 393 unsigned char *data = ip->transfer_buffer + 394 ip->iso_frame_desc[i].offset; 395 int offset; 396 397 for (offset = 0; USBTV_CHUNK_SIZE * offset < size; offset++) 398 usbtv_image_chunk(usbtv, 399 (__be32 *)&data[USBTV_CHUNK_SIZE * offset]); 400 } 401 402 resubmit: 403 ret = usb_submit_urb(ip, GFP_ATOMIC); 404 if (ret < 0) 405 dev_warn(usbtv->dev, "Could not resubmit ISO URB\n"); 406 } 407 408 static struct urb *usbtv_setup_iso_transfer(struct usbtv *usbtv) 409 { 410 struct urb *ip; 411 int size = usbtv->iso_size; 412 int i; 413 414 ip = usb_alloc_urb(USBTV_ISOC_PACKETS, GFP_KERNEL); 415 if (ip == NULL) 416 return NULL; 417 418 ip->dev = usbtv->udev; 419 ip->context = usbtv; 420 ip->pipe = usb_rcvisocpipe(usbtv->udev, USBTV_VIDEO_ENDP); 421 ip->interval = 1; 422 ip->transfer_flags = URB_ISO_ASAP; 423 ip->transfer_buffer = kzalloc(size * USBTV_ISOC_PACKETS, 424 GFP_KERNEL); 425 if (!ip->transfer_buffer) { 426 usb_free_urb(ip); 427 return NULL; 428 } 429 ip->complete = usbtv_iso_cb; 430 ip->number_of_packets = USBTV_ISOC_PACKETS; 431 ip->transfer_buffer_length = size * USBTV_ISOC_PACKETS; 432 for (i = 0; i < USBTV_ISOC_PACKETS; i++) { 433 ip->iso_frame_desc[i].offset = size * i; 434 ip->iso_frame_desc[i].length = size; 435 } 436 437 return ip; 438 } 439 440 static void usbtv_stop(struct usbtv *usbtv) 441 { 442 int i; 443 unsigned long flags; 444 445 /* Cancel running transfers. */ 446 for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) { 447 struct urb *ip = usbtv->isoc_urbs[i]; 448 449 if (ip == NULL) 450 continue; 451 usb_kill_urb(ip); 452 kfree(ip->transfer_buffer); 453 usb_free_urb(ip); 454 usbtv->isoc_urbs[i] = NULL; 455 } 456 457 /* Return buffers to userspace. */ 458 spin_lock_irqsave(&usbtv->buflock, flags); 459 while (!list_empty(&usbtv->bufs)) { 460 struct usbtv_buf *buf = list_first_entry(&usbtv->bufs, 461 struct usbtv_buf, list); 462 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 463 list_del(&buf->list); 464 } 465 spin_unlock_irqrestore(&usbtv->buflock, flags); 466 } 467 468 static int usbtv_start(struct usbtv *usbtv) 469 { 470 int i; 471 int ret; 472 473 usbtv_audio_suspend(usbtv); 474 475 ret = usb_set_interface(usbtv->udev, 0, 0); 476 if (ret < 0) 477 return ret; 478 479 ret = usbtv_setup_capture(usbtv); 480 if (ret < 0) 481 return ret; 482 483 ret = usb_set_interface(usbtv->udev, 0, 1); 484 if (ret < 0) 485 return ret; 486 487 usbtv_audio_resume(usbtv); 488 489 for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) { 490 struct urb *ip; 491 492 ip = usbtv_setup_iso_transfer(usbtv); 493 if (ip == NULL) { 494 ret = -ENOMEM; 495 goto start_fail; 496 } 497 usbtv->isoc_urbs[i] = ip; 498 499 ret = usb_submit_urb(ip, GFP_KERNEL); 500 if (ret < 0) 501 goto start_fail; 502 } 503 504 return 0; 505 506 start_fail: 507 usbtv_stop(usbtv); 508 return ret; 509 } 510 511 static int usbtv_querycap(struct file *file, void *priv, 512 struct v4l2_capability *cap) 513 { 514 struct usbtv *dev = video_drvdata(file); 515 516 strlcpy(cap->driver, "usbtv", sizeof(cap->driver)); 517 strlcpy(cap->card, "usbtv", sizeof(cap->card)); 518 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); 519 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE; 520 cap->device_caps |= V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; 521 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 522 return 0; 523 } 524 525 static int usbtv_enum_input(struct file *file, void *priv, 526 struct v4l2_input *i) 527 { 528 struct usbtv *dev = video_drvdata(file); 529 530 switch (i->index) { 531 case USBTV_COMPOSITE_INPUT: 532 strlcpy(i->name, "Composite", sizeof(i->name)); 533 break; 534 case USBTV_SVIDEO_INPUT: 535 strlcpy(i->name, "S-Video", sizeof(i->name)); 536 break; 537 default: 538 return -EINVAL; 539 } 540 541 i->type = V4L2_INPUT_TYPE_CAMERA; 542 i->std = dev->vdev.tvnorms; 543 return 0; 544 } 545 546 static int usbtv_enum_fmt_vid_cap(struct file *file, void *priv, 547 struct v4l2_fmtdesc *f) 548 { 549 if (f->index > 0) 550 return -EINVAL; 551 552 strlcpy(f->description, "16 bpp YUY2, 4:2:2, packed", 553 sizeof(f->description)); 554 f->pixelformat = V4L2_PIX_FMT_YUYV; 555 return 0; 556 } 557 558 static int usbtv_fmt_vid_cap(struct file *file, void *priv, 559 struct v4l2_format *f) 560 { 561 struct usbtv *usbtv = video_drvdata(file); 562 563 f->fmt.pix.width = usbtv->width; 564 f->fmt.pix.height = usbtv->height; 565 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; 566 f->fmt.pix.field = V4L2_FIELD_INTERLACED; 567 f->fmt.pix.bytesperline = usbtv->width * 2; 568 f->fmt.pix.sizeimage = (f->fmt.pix.bytesperline * f->fmt.pix.height); 569 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 570 571 return 0; 572 } 573 574 static int usbtv_g_std(struct file *file, void *priv, v4l2_std_id *norm) 575 { 576 struct usbtv *usbtv = video_drvdata(file); 577 *norm = usbtv->norm; 578 return 0; 579 } 580 581 static int usbtv_s_std(struct file *file, void *priv, v4l2_std_id norm) 582 { 583 int ret = -EINVAL; 584 struct usbtv *usbtv = video_drvdata(file); 585 586 if ((norm & V4L2_STD_525_60) || (norm & V4L2_STD_PAL)) 587 ret = usbtv_select_norm(usbtv, norm); 588 589 return ret; 590 } 591 592 static int usbtv_g_input(struct file *file, void *priv, unsigned int *i) 593 { 594 struct usbtv *usbtv = video_drvdata(file); 595 *i = usbtv->input; 596 return 0; 597 } 598 599 static int usbtv_s_input(struct file *file, void *priv, unsigned int i) 600 { 601 struct usbtv *usbtv = video_drvdata(file); 602 603 return usbtv_select_input(usbtv, i); 604 } 605 606 static struct v4l2_ioctl_ops usbtv_ioctl_ops = { 607 .vidioc_querycap = usbtv_querycap, 608 .vidioc_enum_input = usbtv_enum_input, 609 .vidioc_enum_fmt_vid_cap = usbtv_enum_fmt_vid_cap, 610 .vidioc_g_fmt_vid_cap = usbtv_fmt_vid_cap, 611 .vidioc_try_fmt_vid_cap = usbtv_fmt_vid_cap, 612 .vidioc_s_fmt_vid_cap = usbtv_fmt_vid_cap, 613 .vidioc_g_std = usbtv_g_std, 614 .vidioc_s_std = usbtv_s_std, 615 .vidioc_g_input = usbtv_g_input, 616 .vidioc_s_input = usbtv_s_input, 617 618 .vidioc_reqbufs = vb2_ioctl_reqbufs, 619 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 620 .vidioc_querybuf = vb2_ioctl_querybuf, 621 .vidioc_create_bufs = vb2_ioctl_create_bufs, 622 .vidioc_qbuf = vb2_ioctl_qbuf, 623 .vidioc_dqbuf = vb2_ioctl_dqbuf, 624 .vidioc_streamon = vb2_ioctl_streamon, 625 .vidioc_streamoff = vb2_ioctl_streamoff, 626 }; 627 628 static struct v4l2_file_operations usbtv_fops = { 629 .owner = THIS_MODULE, 630 .unlocked_ioctl = video_ioctl2, 631 .mmap = vb2_fop_mmap, 632 .open = v4l2_fh_open, 633 .release = vb2_fop_release, 634 .read = vb2_fop_read, 635 .poll = vb2_fop_poll, 636 }; 637 638 static int usbtv_queue_setup(struct vb2_queue *vq, 639 unsigned int *nbuffers, 640 unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[]) 641 { 642 struct usbtv *usbtv = vb2_get_drv_priv(vq); 643 unsigned size = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32); 644 645 if (vq->num_buffers + *nbuffers < 2) 646 *nbuffers = 2 - vq->num_buffers; 647 if (*nplanes) 648 return sizes[0] < size ? -EINVAL : 0; 649 *nplanes = 1; 650 sizes[0] = size; 651 652 return 0; 653 } 654 655 static void usbtv_buf_queue(struct vb2_buffer *vb) 656 { 657 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 658 struct usbtv *usbtv = vb2_get_drv_priv(vb->vb2_queue); 659 struct usbtv_buf *buf = container_of(vbuf, struct usbtv_buf, vb); 660 unsigned long flags; 661 662 if (usbtv->udev == NULL) { 663 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); 664 return; 665 } 666 667 spin_lock_irqsave(&usbtv->buflock, flags); 668 list_add_tail(&buf->list, &usbtv->bufs); 669 spin_unlock_irqrestore(&usbtv->buflock, flags); 670 } 671 672 static int usbtv_start_streaming(struct vb2_queue *vq, unsigned int count) 673 { 674 struct usbtv *usbtv = vb2_get_drv_priv(vq); 675 676 if (usbtv->udev == NULL) 677 return -ENODEV; 678 679 usbtv->last_odd = 1; 680 usbtv->sequence = 0; 681 return usbtv_start(usbtv); 682 } 683 684 static void usbtv_stop_streaming(struct vb2_queue *vq) 685 { 686 struct usbtv *usbtv = vb2_get_drv_priv(vq); 687 688 if (usbtv->udev) 689 usbtv_stop(usbtv); 690 } 691 692 static const struct vb2_ops usbtv_vb2_ops = { 693 .queue_setup = usbtv_queue_setup, 694 .buf_queue = usbtv_buf_queue, 695 .start_streaming = usbtv_start_streaming, 696 .stop_streaming = usbtv_stop_streaming, 697 }; 698 699 static void usbtv_release(struct v4l2_device *v4l2_dev) 700 { 701 struct usbtv *usbtv = container_of(v4l2_dev, struct usbtv, v4l2_dev); 702 703 v4l2_device_unregister(&usbtv->v4l2_dev); 704 vb2_queue_release(&usbtv->vb2q); 705 kfree(usbtv); 706 } 707 708 int usbtv_video_init(struct usbtv *usbtv) 709 { 710 int ret; 711 712 (void)usbtv_configure_for_norm(usbtv, V4L2_STD_525_60); 713 714 spin_lock_init(&usbtv->buflock); 715 mutex_init(&usbtv->v4l2_lock); 716 mutex_init(&usbtv->vb2q_lock); 717 INIT_LIST_HEAD(&usbtv->bufs); 718 719 /* videobuf2 structure */ 720 usbtv->vb2q.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 721 usbtv->vb2q.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ; 722 usbtv->vb2q.drv_priv = usbtv; 723 usbtv->vb2q.buf_struct_size = sizeof(struct usbtv_buf); 724 usbtv->vb2q.ops = &usbtv_vb2_ops; 725 usbtv->vb2q.mem_ops = &vb2_vmalloc_memops; 726 usbtv->vb2q.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 727 usbtv->vb2q.lock = &usbtv->vb2q_lock; 728 ret = vb2_queue_init(&usbtv->vb2q); 729 if (ret < 0) { 730 dev_warn(usbtv->dev, "Could not initialize videobuf2 queue\n"); 731 return ret; 732 } 733 734 /* v4l2 structure */ 735 usbtv->v4l2_dev.release = usbtv_release; 736 ret = v4l2_device_register(usbtv->dev, &usbtv->v4l2_dev); 737 if (ret < 0) { 738 dev_warn(usbtv->dev, "Could not register v4l2 device\n"); 739 goto v4l2_fail; 740 } 741 742 /* Video structure */ 743 strlcpy(usbtv->vdev.name, "usbtv", sizeof(usbtv->vdev.name)); 744 usbtv->vdev.v4l2_dev = &usbtv->v4l2_dev; 745 usbtv->vdev.release = video_device_release_empty; 746 usbtv->vdev.fops = &usbtv_fops; 747 usbtv->vdev.ioctl_ops = &usbtv_ioctl_ops; 748 usbtv->vdev.tvnorms = USBTV_TV_STD; 749 usbtv->vdev.queue = &usbtv->vb2q; 750 usbtv->vdev.lock = &usbtv->v4l2_lock; 751 video_set_drvdata(&usbtv->vdev, usbtv); 752 ret = video_register_device(&usbtv->vdev, VFL_TYPE_GRABBER, -1); 753 if (ret < 0) { 754 dev_warn(usbtv->dev, "Could not register video device\n"); 755 goto vdev_fail; 756 } 757 758 return 0; 759 760 vdev_fail: 761 v4l2_device_unregister(&usbtv->v4l2_dev); 762 v4l2_fail: 763 vb2_queue_release(&usbtv->vb2q); 764 765 return ret; 766 } 767 768 void usbtv_video_free(struct usbtv *usbtv) 769 { 770 mutex_lock(&usbtv->vb2q_lock); 771 mutex_lock(&usbtv->v4l2_lock); 772 773 usbtv_stop(usbtv); 774 video_unregister_device(&usbtv->vdev); 775 v4l2_device_disconnect(&usbtv->v4l2_dev); 776 777 mutex_unlock(&usbtv->v4l2_lock); 778 mutex_unlock(&usbtv->vb2q_lock); 779 780 v4l2_device_put(&usbtv->v4l2_dev); 781 } 782