1 /* 2 * Copyright (c) 2013,2016 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 const 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_625_50, 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 const 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 = 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 uint16_t usbtv_norm_to_16f_reg(v4l2_std_id norm) 125 { 126 /* NTSC M/M-JP/M-KR */ 127 if (norm & V4L2_STD_NTSC) 128 return 0x00b8; 129 /* PAL BG/DK/H/I */ 130 if (norm & V4L2_STD_PAL) 131 return 0x00ee; 132 /* SECAM B/D/G/H/K/K1/L/Lc */ 133 if (norm & V4L2_STD_SECAM) 134 return 0x00ff; 135 if (norm & V4L2_STD_NTSC_443) 136 return 0x00a8; 137 if (norm & (V4L2_STD_PAL_M | V4L2_STD_PAL_60)) 138 return 0x00bc; 139 if (norm & V4L2_STD_PAL_Nc) 140 return 0x00fe; 141 /* Fallback to automatic detection for other standards */ 142 return 0x0000; 143 } 144 145 static int usbtv_select_norm(struct usbtv *usbtv, v4l2_std_id norm) 146 { 147 int ret; 148 /* These are the series of register values used to configure the 149 * decoder for a specific standard. 150 * The first 21 register writes are copied from the 151 * Settings\DecoderDefaults registry keys present in the Windows driver 152 * .INF file, and control various image tuning parameters (color 153 * correction, sharpness, ...). 154 */ 155 static const u16 pal[][2] = { 156 /* "AVPAL" tuning sequence from .INF file */ 157 { USBTV_BASE + 0x0003, 0x0004 }, 158 { USBTV_BASE + 0x001a, 0x0068 }, 159 { USBTV_BASE + 0x0100, 0x00d3 }, 160 { USBTV_BASE + 0x010e, 0x0072 }, 161 { USBTV_BASE + 0x010f, 0x00a2 }, 162 { USBTV_BASE + 0x0112, 0x00b0 }, 163 { USBTV_BASE + 0x0115, 0x0015 }, 164 { USBTV_BASE + 0x0117, 0x0001 }, 165 { USBTV_BASE + 0x0118, 0x002c }, 166 { USBTV_BASE + 0x012d, 0x0010 }, 167 { USBTV_BASE + 0x012f, 0x0020 }, 168 { USBTV_BASE + 0x0220, 0x002e }, 169 { USBTV_BASE + 0x0225, 0x0008 }, 170 { USBTV_BASE + 0x024e, 0x0002 }, 171 { USBTV_BASE + 0x024f, 0x0002 }, 172 { USBTV_BASE + 0x0254, 0x0059 }, 173 { USBTV_BASE + 0x025a, 0x0016 }, 174 { USBTV_BASE + 0x025b, 0x0035 }, 175 { USBTV_BASE + 0x0263, 0x0017 }, 176 { USBTV_BASE + 0x0266, 0x0016 }, 177 { USBTV_BASE + 0x0267, 0x0036 }, 178 /* End image tuning */ 179 { USBTV_BASE + 0x024e, 0x0002 }, 180 { USBTV_BASE + 0x024f, 0x0002 }, 181 }; 182 183 static const u16 ntsc[][2] = { 184 /* "AVNTSC" tuning sequence from .INF file */ 185 { USBTV_BASE + 0x0003, 0x0004 }, 186 { USBTV_BASE + 0x001a, 0x0079 }, 187 { USBTV_BASE + 0x0100, 0x00d3 }, 188 { USBTV_BASE + 0x010e, 0x0068 }, 189 { USBTV_BASE + 0x010f, 0x009c }, 190 { USBTV_BASE + 0x0112, 0x00f0 }, 191 { USBTV_BASE + 0x0115, 0x0015 }, 192 { USBTV_BASE + 0x0117, 0x0000 }, 193 { USBTV_BASE + 0x0118, 0x00fc }, 194 { USBTV_BASE + 0x012d, 0x0004 }, 195 { USBTV_BASE + 0x012f, 0x0008 }, 196 { USBTV_BASE + 0x0220, 0x002e }, 197 { USBTV_BASE + 0x0225, 0x0008 }, 198 { USBTV_BASE + 0x024e, 0x0002 }, 199 { USBTV_BASE + 0x024f, 0x0001 }, 200 { USBTV_BASE + 0x0254, 0x005f }, 201 { USBTV_BASE + 0x025a, 0x0012 }, 202 { USBTV_BASE + 0x025b, 0x0001 }, 203 { USBTV_BASE + 0x0263, 0x001c }, 204 { USBTV_BASE + 0x0266, 0x0011 }, 205 { USBTV_BASE + 0x0267, 0x0005 }, 206 /* End image tuning */ 207 { USBTV_BASE + 0x024e, 0x0002 }, 208 { USBTV_BASE + 0x024f, 0x0002 }, 209 }; 210 211 static const u16 secam[][2] = { 212 /* "AVSECAM" tuning sequence from .INF file */ 213 { USBTV_BASE + 0x0003, 0x0004 }, 214 { USBTV_BASE + 0x001a, 0x0073 }, 215 { USBTV_BASE + 0x0100, 0x00dc }, 216 { USBTV_BASE + 0x010e, 0x0072 }, 217 { USBTV_BASE + 0x010f, 0x00a2 }, 218 { USBTV_BASE + 0x0112, 0x0090 }, 219 { USBTV_BASE + 0x0115, 0x0035 }, 220 { USBTV_BASE + 0x0117, 0x0001 }, 221 { USBTV_BASE + 0x0118, 0x0030 }, 222 { USBTV_BASE + 0x012d, 0x0004 }, 223 { USBTV_BASE + 0x012f, 0x0008 }, 224 { USBTV_BASE + 0x0220, 0x002d }, 225 { USBTV_BASE + 0x0225, 0x0028 }, 226 { USBTV_BASE + 0x024e, 0x0008 }, 227 { USBTV_BASE + 0x024f, 0x0002 }, 228 { USBTV_BASE + 0x0254, 0x0069 }, 229 { USBTV_BASE + 0x025a, 0x0016 }, 230 { USBTV_BASE + 0x025b, 0x0035 }, 231 { USBTV_BASE + 0x0263, 0x0021 }, 232 { USBTV_BASE + 0x0266, 0x0016 }, 233 { USBTV_BASE + 0x0267, 0x0036 }, 234 /* End image tuning */ 235 { USBTV_BASE + 0x024e, 0x0002 }, 236 { USBTV_BASE + 0x024f, 0x0002 }, 237 }; 238 239 ret = usbtv_configure_for_norm(usbtv, norm); 240 241 if (!ret) { 242 /* Masks for norms using a NTSC or PAL color encoding. */ 243 static const v4l2_std_id ntsc_mask = 244 V4L2_STD_NTSC | V4L2_STD_NTSC_443; 245 static const v4l2_std_id pal_mask = 246 V4L2_STD_PAL | V4L2_STD_PAL_60 | V4L2_STD_PAL_M | 247 V4L2_STD_PAL_Nc; 248 249 if (norm & ntsc_mask) 250 ret = usbtv_set_regs(usbtv, ntsc, ARRAY_SIZE(ntsc)); 251 else if (norm & pal_mask) 252 ret = usbtv_set_regs(usbtv, pal, ARRAY_SIZE(pal)); 253 else if (norm & V4L2_STD_SECAM) 254 ret = usbtv_set_regs(usbtv, secam, ARRAY_SIZE(secam)); 255 else 256 ret = -EINVAL; 257 } 258 259 if (!ret) { 260 /* Configure the decoder for the color standard */ 261 const u16 cfg[][2] = { 262 { USBTV_BASE + 0x016f, usbtv_norm_to_16f_reg(norm) } 263 }; 264 ret = usbtv_set_regs(usbtv, cfg, ARRAY_SIZE(cfg)); 265 } 266 267 return ret; 268 } 269 270 static int usbtv_setup_capture(struct usbtv *usbtv) 271 { 272 int ret; 273 static const u16 setup[][2] = { 274 /* These seem to enable the device. */ 275 { USBTV_BASE + 0x0008, 0x0001 }, 276 { USBTV_BASE + 0x01d0, 0x00ff }, 277 { USBTV_BASE + 0x01d9, 0x0002 }, 278 279 /* These seem to influence color parameters, such as 280 * brightness, etc. */ 281 { USBTV_BASE + 0x0239, 0x0040 }, 282 { USBTV_BASE + 0x0240, 0x0000 }, 283 { USBTV_BASE + 0x0241, 0x0000 }, 284 { USBTV_BASE + 0x0242, 0x0002 }, 285 { USBTV_BASE + 0x0243, 0x0080 }, 286 { USBTV_BASE + 0x0244, 0x0012 }, 287 { USBTV_BASE + 0x0245, 0x0090 }, 288 { USBTV_BASE + 0x0246, 0x0000 }, 289 290 { USBTV_BASE + 0x0278, 0x002d }, 291 { USBTV_BASE + 0x0279, 0x000a }, 292 { USBTV_BASE + 0x027a, 0x0032 }, 293 { 0xf890, 0x000c }, 294 { 0xf894, 0x0086 }, 295 296 { USBTV_BASE + 0x00ac, 0x00c0 }, 297 { USBTV_BASE + 0x00ad, 0x0000 }, 298 { USBTV_BASE + 0x00a2, 0x0012 }, 299 { USBTV_BASE + 0x00a3, 0x00e0 }, 300 { USBTV_BASE + 0x00a4, 0x0028 }, 301 { USBTV_BASE + 0x00a5, 0x0082 }, 302 { USBTV_BASE + 0x00a7, 0x0080 }, 303 { USBTV_BASE + 0x0000, 0x0014 }, 304 { USBTV_BASE + 0x0006, 0x0003 }, 305 { USBTV_BASE + 0x0090, 0x0099 }, 306 { USBTV_BASE + 0x0091, 0x0090 }, 307 { USBTV_BASE + 0x0094, 0x0068 }, 308 { USBTV_BASE + 0x0095, 0x0070 }, 309 { USBTV_BASE + 0x009c, 0x0030 }, 310 { USBTV_BASE + 0x009d, 0x00c0 }, 311 { USBTV_BASE + 0x009e, 0x00e0 }, 312 { USBTV_BASE + 0x0019, 0x0006 }, 313 { USBTV_BASE + 0x008c, 0x00ba }, 314 { USBTV_BASE + 0x0101, 0x00ff }, 315 { USBTV_BASE + 0x010c, 0x00b3 }, 316 { USBTV_BASE + 0x01b2, 0x0080 }, 317 { USBTV_BASE + 0x01b4, 0x00a0 }, 318 { USBTV_BASE + 0x014c, 0x00ff }, 319 { USBTV_BASE + 0x014d, 0x00ca }, 320 { USBTV_BASE + 0x0113, 0x0053 }, 321 { USBTV_BASE + 0x0119, 0x008a }, 322 { USBTV_BASE + 0x013c, 0x0003 }, 323 { USBTV_BASE + 0x0150, 0x009c }, 324 { USBTV_BASE + 0x0151, 0x0071 }, 325 { USBTV_BASE + 0x0152, 0x00c6 }, 326 { USBTV_BASE + 0x0153, 0x0084 }, 327 { USBTV_BASE + 0x0154, 0x00bc }, 328 { USBTV_BASE + 0x0155, 0x00a0 }, 329 { USBTV_BASE + 0x0156, 0x00a0 }, 330 { USBTV_BASE + 0x0157, 0x009c }, 331 { USBTV_BASE + 0x0158, 0x001f }, 332 { USBTV_BASE + 0x0159, 0x0006 }, 333 { USBTV_BASE + 0x015d, 0x0000 }, 334 }; 335 336 ret = usbtv_set_regs(usbtv, setup, ARRAY_SIZE(setup)); 337 if (ret) 338 return ret; 339 340 ret = usbtv_select_norm(usbtv, usbtv->norm); 341 if (ret) 342 return ret; 343 344 ret = usbtv_select_input(usbtv, usbtv->input); 345 if (ret) 346 return ret; 347 348 ret = v4l2_ctrl_handler_setup(&usbtv->ctrl); 349 if (ret) 350 return ret; 351 352 return 0; 353 } 354 355 /* Copy data from chunk into a frame buffer, deinterlacing the data 356 * into every second line. Unfortunately, they don't align nicely into 357 * 720 pixel lines, as the chunk is 240 words long, which is 480 pixels. 358 * Therefore, we break down the chunk into two halves before copying, 359 * so that we can interleave a line if needed. 360 * 361 * Each "chunk" is 240 words; a word in this context equals 4 bytes. 362 * Image format is YUYV/YUV 4:2:2, consisting of Y Cr Y Cb, defining two 363 * pixels, the Cr and Cb shared between the two pixels, but each having 364 * separate Y values. Thus, the 240 words equal 480 pixels. It therefore, 365 * takes 1.5 chunks to make a 720 pixel-wide line for the frame. 366 * The image is interlaced, so there is a "scan" of odd lines, followed 367 * by "scan" of even numbered lines. 368 * 369 * Following code is writing the chunks in correct sequence, skipping 370 * the rows based on "odd" value. 371 * line 1: chunk[0][ 0..479] chunk[0][480..959] chunk[1][ 0..479] 372 * line 3: chunk[1][480..959] chunk[2][ 0..479] chunk[2][480..959] 373 * ...etc. 374 */ 375 static void usbtv_chunk_to_vbuf(u32 *frame, __be32 *src, int chunk_no, int odd) 376 { 377 int half; 378 379 for (half = 0; half < 2; half++) { 380 int part_no = chunk_no * 2 + half; 381 int line = part_no / 3; 382 int part_index = (line * 2 + !odd) * 3 + (part_no % 3); 383 384 u32 *dst = &frame[part_index * USBTV_CHUNK/2]; 385 386 memcpy(dst, src, USBTV_CHUNK/2 * sizeof(*src)); 387 src += USBTV_CHUNK/2; 388 } 389 } 390 391 /* Called for each 256-byte image chunk. 392 * First word identifies the chunk, followed by 240 words of image 393 * data and padding. */ 394 static void usbtv_image_chunk(struct usbtv *usbtv, __be32 *chunk) 395 { 396 int frame_id, odd, chunk_no; 397 u32 *frame; 398 struct usbtv_buf *buf; 399 unsigned long flags; 400 401 /* Ignore corrupted lines. */ 402 if (!USBTV_MAGIC_OK(chunk)) 403 return; 404 frame_id = USBTV_FRAME_ID(chunk); 405 odd = USBTV_ODD(chunk); 406 chunk_no = USBTV_CHUNK_NO(chunk); 407 if (chunk_no >= usbtv->n_chunks) 408 return; 409 410 /* Beginning of a frame. */ 411 if (chunk_no == 0) { 412 usbtv->frame_id = frame_id; 413 usbtv->chunks_done = 0; 414 } 415 416 if (usbtv->frame_id != frame_id) 417 return; 418 419 spin_lock_irqsave(&usbtv->buflock, flags); 420 if (list_empty(&usbtv->bufs)) { 421 /* No free buffers. Userspace likely too slow. */ 422 spin_unlock_irqrestore(&usbtv->buflock, flags); 423 return; 424 } 425 426 /* First available buffer. */ 427 buf = list_first_entry(&usbtv->bufs, struct usbtv_buf, list); 428 frame = vb2_plane_vaddr(&buf->vb.vb2_buf, 0); 429 430 /* Copy the chunk data. */ 431 usbtv_chunk_to_vbuf(frame, &chunk[1], chunk_no, odd); 432 usbtv->chunks_done++; 433 434 /* Last chunk in a field */ 435 if (chunk_no == usbtv->n_chunks-1) { 436 /* Last chunk in a frame, signalling an end */ 437 if (odd && !usbtv->last_odd) { 438 int size = vb2_plane_size(&buf->vb.vb2_buf, 0); 439 enum vb2_buffer_state state = usbtv->chunks_done == 440 usbtv->n_chunks ? 441 VB2_BUF_STATE_DONE : 442 VB2_BUF_STATE_ERROR; 443 444 buf->vb.field = V4L2_FIELD_INTERLACED; 445 buf->vb.sequence = usbtv->sequence++; 446 buf->vb.vb2_buf.timestamp = ktime_get_ns(); 447 vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size); 448 vb2_buffer_done(&buf->vb.vb2_buf, state); 449 list_del(&buf->list); 450 } 451 usbtv->last_odd = odd; 452 } 453 454 spin_unlock_irqrestore(&usbtv->buflock, flags); 455 } 456 457 /* Got image data. Each packet contains a number of 256-word chunks we 458 * compose the image from. */ 459 static void usbtv_iso_cb(struct urb *ip) 460 { 461 int ret; 462 int i; 463 struct usbtv *usbtv = (struct usbtv *)ip->context; 464 465 switch (ip->status) { 466 /* All fine. */ 467 case 0: 468 break; 469 /* Device disconnected or capture stopped? */ 470 case -ENODEV: 471 case -ENOENT: 472 case -ECONNRESET: 473 case -ESHUTDOWN: 474 return; 475 /* Unknown error. Retry. */ 476 default: 477 dev_warn(usbtv->dev, "Bad response for ISO request.\n"); 478 goto resubmit; 479 } 480 481 for (i = 0; i < ip->number_of_packets; i++) { 482 int size = ip->iso_frame_desc[i].actual_length; 483 unsigned char *data = ip->transfer_buffer + 484 ip->iso_frame_desc[i].offset; 485 int offset; 486 487 for (offset = 0; USBTV_CHUNK_SIZE * offset < size; offset++) 488 usbtv_image_chunk(usbtv, 489 (__be32 *)&data[USBTV_CHUNK_SIZE * offset]); 490 } 491 492 resubmit: 493 ret = usb_submit_urb(ip, GFP_ATOMIC); 494 if (ret < 0) 495 dev_warn(usbtv->dev, "Could not resubmit ISO URB\n"); 496 } 497 498 static struct urb *usbtv_setup_iso_transfer(struct usbtv *usbtv) 499 { 500 struct urb *ip; 501 int size = usbtv->iso_size; 502 int i; 503 504 ip = usb_alloc_urb(USBTV_ISOC_PACKETS, GFP_KERNEL); 505 if (ip == NULL) 506 return NULL; 507 508 ip->dev = usbtv->udev; 509 ip->context = usbtv; 510 ip->pipe = usb_rcvisocpipe(usbtv->udev, USBTV_VIDEO_ENDP); 511 ip->interval = 1; 512 ip->transfer_flags = URB_ISO_ASAP; 513 ip->transfer_buffer = kcalloc(USBTV_ISOC_PACKETS, size, 514 GFP_KERNEL); 515 if (!ip->transfer_buffer) { 516 usb_free_urb(ip); 517 return NULL; 518 } 519 ip->complete = usbtv_iso_cb; 520 ip->number_of_packets = USBTV_ISOC_PACKETS; 521 ip->transfer_buffer_length = size * USBTV_ISOC_PACKETS; 522 for (i = 0; i < USBTV_ISOC_PACKETS; i++) { 523 ip->iso_frame_desc[i].offset = size * i; 524 ip->iso_frame_desc[i].length = size; 525 } 526 527 return ip; 528 } 529 530 static void usbtv_stop(struct usbtv *usbtv) 531 { 532 int i; 533 unsigned long flags; 534 535 /* Cancel running transfers. */ 536 for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) { 537 struct urb *ip = usbtv->isoc_urbs[i]; 538 539 if (ip == NULL) 540 continue; 541 usb_kill_urb(ip); 542 kfree(ip->transfer_buffer); 543 usb_free_urb(ip); 544 usbtv->isoc_urbs[i] = NULL; 545 } 546 547 /* Return buffers to userspace. */ 548 spin_lock_irqsave(&usbtv->buflock, flags); 549 while (!list_empty(&usbtv->bufs)) { 550 struct usbtv_buf *buf = list_first_entry(&usbtv->bufs, 551 struct usbtv_buf, list); 552 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 553 list_del(&buf->list); 554 } 555 spin_unlock_irqrestore(&usbtv->buflock, flags); 556 } 557 558 static int usbtv_start(struct usbtv *usbtv) 559 { 560 int i; 561 int ret; 562 563 usbtv_audio_suspend(usbtv); 564 565 ret = usb_set_interface(usbtv->udev, 0, 0); 566 if (ret < 0) 567 return ret; 568 569 ret = usbtv_setup_capture(usbtv); 570 if (ret < 0) 571 return ret; 572 573 ret = usb_set_interface(usbtv->udev, 0, 1); 574 if (ret < 0) 575 return ret; 576 577 usbtv_audio_resume(usbtv); 578 579 for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) { 580 struct urb *ip; 581 582 ip = usbtv_setup_iso_transfer(usbtv); 583 if (ip == NULL) { 584 ret = -ENOMEM; 585 goto start_fail; 586 } 587 usbtv->isoc_urbs[i] = ip; 588 589 ret = usb_submit_urb(ip, GFP_KERNEL); 590 if (ret < 0) 591 goto start_fail; 592 } 593 594 return 0; 595 596 start_fail: 597 usbtv_stop(usbtv); 598 return ret; 599 } 600 601 static int usbtv_querycap(struct file *file, void *priv, 602 struct v4l2_capability *cap) 603 { 604 struct usbtv *dev = video_drvdata(file); 605 606 strscpy(cap->driver, "usbtv", sizeof(cap->driver)); 607 strscpy(cap->card, "usbtv", sizeof(cap->card)); 608 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); 609 return 0; 610 } 611 612 static int usbtv_enum_input(struct file *file, void *priv, 613 struct v4l2_input *i) 614 { 615 struct usbtv *dev = video_drvdata(file); 616 617 switch (i->index) { 618 case USBTV_COMPOSITE_INPUT: 619 strscpy(i->name, "Composite", sizeof(i->name)); 620 break; 621 case USBTV_SVIDEO_INPUT: 622 strscpy(i->name, "S-Video", sizeof(i->name)); 623 break; 624 default: 625 return -EINVAL; 626 } 627 628 i->type = V4L2_INPUT_TYPE_CAMERA; 629 i->std = dev->vdev.tvnorms; 630 return 0; 631 } 632 633 static int usbtv_enum_fmt_vid_cap(struct file *file, void *priv, 634 struct v4l2_fmtdesc *f) 635 { 636 if (f->index > 0) 637 return -EINVAL; 638 639 f->pixelformat = V4L2_PIX_FMT_YUYV; 640 return 0; 641 } 642 643 static int usbtv_fmt_vid_cap(struct file *file, void *priv, 644 struct v4l2_format *f) 645 { 646 struct usbtv *usbtv = video_drvdata(file); 647 648 f->fmt.pix.width = usbtv->width; 649 f->fmt.pix.height = usbtv->height; 650 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; 651 f->fmt.pix.field = V4L2_FIELD_INTERLACED; 652 f->fmt.pix.bytesperline = usbtv->width * 2; 653 f->fmt.pix.sizeimage = (f->fmt.pix.bytesperline * f->fmt.pix.height); 654 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 655 656 return 0; 657 } 658 659 static int usbtv_g_std(struct file *file, void *priv, v4l2_std_id *norm) 660 { 661 struct usbtv *usbtv = video_drvdata(file); 662 *norm = usbtv->norm; 663 return 0; 664 } 665 666 static int usbtv_s_std(struct file *file, void *priv, v4l2_std_id norm) 667 { 668 int ret = -EINVAL; 669 struct usbtv *usbtv = video_drvdata(file); 670 671 if (norm & USBTV_TV_STD) 672 ret = usbtv_select_norm(usbtv, norm); 673 674 return ret; 675 } 676 677 static int usbtv_g_input(struct file *file, void *priv, unsigned int *i) 678 { 679 struct usbtv *usbtv = video_drvdata(file); 680 *i = usbtv->input; 681 return 0; 682 } 683 684 static int usbtv_s_input(struct file *file, void *priv, unsigned int i) 685 { 686 struct usbtv *usbtv = video_drvdata(file); 687 688 return usbtv_select_input(usbtv, i); 689 } 690 691 static const struct v4l2_ioctl_ops usbtv_ioctl_ops = { 692 .vidioc_querycap = usbtv_querycap, 693 .vidioc_enum_input = usbtv_enum_input, 694 .vidioc_enum_fmt_vid_cap = usbtv_enum_fmt_vid_cap, 695 .vidioc_g_fmt_vid_cap = usbtv_fmt_vid_cap, 696 .vidioc_try_fmt_vid_cap = usbtv_fmt_vid_cap, 697 .vidioc_s_fmt_vid_cap = usbtv_fmt_vid_cap, 698 .vidioc_g_std = usbtv_g_std, 699 .vidioc_s_std = usbtv_s_std, 700 .vidioc_g_input = usbtv_g_input, 701 .vidioc_s_input = usbtv_s_input, 702 703 .vidioc_reqbufs = vb2_ioctl_reqbufs, 704 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 705 .vidioc_querybuf = vb2_ioctl_querybuf, 706 .vidioc_create_bufs = vb2_ioctl_create_bufs, 707 .vidioc_qbuf = vb2_ioctl_qbuf, 708 .vidioc_dqbuf = vb2_ioctl_dqbuf, 709 .vidioc_streamon = vb2_ioctl_streamon, 710 .vidioc_streamoff = vb2_ioctl_streamoff, 711 }; 712 713 static const struct v4l2_file_operations usbtv_fops = { 714 .owner = THIS_MODULE, 715 .unlocked_ioctl = video_ioctl2, 716 .mmap = vb2_fop_mmap, 717 .open = v4l2_fh_open, 718 .release = vb2_fop_release, 719 .read = vb2_fop_read, 720 .poll = vb2_fop_poll, 721 }; 722 723 static int usbtv_queue_setup(struct vb2_queue *vq, 724 unsigned int *nbuffers, 725 unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[]) 726 { 727 struct usbtv *usbtv = vb2_get_drv_priv(vq); 728 unsigned size = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32); 729 730 if (vq->num_buffers + *nbuffers < 2) 731 *nbuffers = 2 - vq->num_buffers; 732 if (*nplanes) 733 return sizes[0] < size ? -EINVAL : 0; 734 *nplanes = 1; 735 sizes[0] = size; 736 737 return 0; 738 } 739 740 static void usbtv_buf_queue(struct vb2_buffer *vb) 741 { 742 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 743 struct usbtv *usbtv = vb2_get_drv_priv(vb->vb2_queue); 744 struct usbtv_buf *buf = container_of(vbuf, struct usbtv_buf, vb); 745 unsigned long flags; 746 747 if (usbtv->udev == NULL) { 748 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); 749 return; 750 } 751 752 spin_lock_irqsave(&usbtv->buflock, flags); 753 list_add_tail(&buf->list, &usbtv->bufs); 754 spin_unlock_irqrestore(&usbtv->buflock, flags); 755 } 756 757 static int usbtv_start_streaming(struct vb2_queue *vq, unsigned int count) 758 { 759 struct usbtv *usbtv = vb2_get_drv_priv(vq); 760 761 if (usbtv->udev == NULL) 762 return -ENODEV; 763 764 usbtv->last_odd = 1; 765 usbtv->sequence = 0; 766 return usbtv_start(usbtv); 767 } 768 769 static void usbtv_stop_streaming(struct vb2_queue *vq) 770 { 771 struct usbtv *usbtv = vb2_get_drv_priv(vq); 772 773 if (usbtv->udev) 774 usbtv_stop(usbtv); 775 } 776 777 static const struct vb2_ops usbtv_vb2_ops = { 778 .queue_setup = usbtv_queue_setup, 779 .buf_queue = usbtv_buf_queue, 780 .start_streaming = usbtv_start_streaming, 781 .stop_streaming = usbtv_stop_streaming, 782 .wait_prepare = vb2_ops_wait_prepare, 783 .wait_finish = vb2_ops_wait_finish, 784 }; 785 786 static int usbtv_s_ctrl(struct v4l2_ctrl *ctrl) 787 { 788 struct usbtv *usbtv = container_of(ctrl->handler, struct usbtv, 789 ctrl); 790 u8 *data; 791 u16 index, size; 792 int ret; 793 794 data = kmalloc(3, GFP_KERNEL); 795 if (!data) 796 return -ENOMEM; 797 798 /* 799 * Read in the current brightness/contrast registers. We need them 800 * both, because the values are for some reason interleaved. 801 */ 802 if (ctrl->id == V4L2_CID_BRIGHTNESS || ctrl->id == V4L2_CID_CONTRAST) { 803 ret = usb_control_msg(usbtv->udev, 804 usb_rcvctrlpipe(usbtv->udev, 0), USBTV_CONTROL_REG, 805 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 806 0, USBTV_BASE + 0x0244, (void *)data, 3, 807 USB_CTRL_GET_TIMEOUT); 808 if (ret < 0) 809 goto error; 810 } 811 812 switch (ctrl->id) { 813 case V4L2_CID_BRIGHTNESS: 814 index = USBTV_BASE + 0x0244; 815 size = 3; 816 data[0] &= 0xf0; 817 data[0] |= (ctrl->val >> 8) & 0xf; 818 data[2] = ctrl->val & 0xff; 819 break; 820 case V4L2_CID_CONTRAST: 821 index = USBTV_BASE + 0x0244; 822 size = 3; 823 data[0] &= 0x0f; 824 data[0] |= (ctrl->val >> 4) & 0xf0; 825 data[1] = ctrl->val & 0xff; 826 break; 827 case V4L2_CID_SATURATION: 828 index = USBTV_BASE + 0x0242; 829 data[0] = ctrl->val >> 8; 830 data[1] = ctrl->val & 0xff; 831 size = 2; 832 break; 833 case V4L2_CID_HUE: 834 index = USBTV_BASE + 0x0240; 835 size = 2; 836 if (ctrl->val > 0) { 837 data[0] = 0x92 + (ctrl->val >> 8); 838 data[1] = ctrl->val & 0xff; 839 } else { 840 data[0] = 0x82 + (-ctrl->val >> 8); 841 data[1] = -ctrl->val & 0xff; 842 } 843 break; 844 case V4L2_CID_SHARPNESS: 845 index = USBTV_BASE + 0x0239; 846 data[0] = 0; 847 data[1] = ctrl->val; 848 size = 2; 849 break; 850 default: 851 kfree(data); 852 return -EINVAL; 853 } 854 855 ret = usb_control_msg(usbtv->udev, usb_sndctrlpipe(usbtv->udev, 0), 856 USBTV_CONTROL_REG, 857 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 858 0, index, (void *)data, size, USB_CTRL_SET_TIMEOUT); 859 860 error: 861 if (ret < 0) 862 dev_warn(usbtv->dev, "Failed to submit a control request.\n"); 863 864 kfree(data); 865 return ret; 866 } 867 868 static const struct v4l2_ctrl_ops usbtv_ctrl_ops = { 869 .s_ctrl = usbtv_s_ctrl, 870 }; 871 872 static void usbtv_release(struct v4l2_device *v4l2_dev) 873 { 874 struct usbtv *usbtv = container_of(v4l2_dev, struct usbtv, v4l2_dev); 875 876 v4l2_device_unregister(&usbtv->v4l2_dev); 877 v4l2_ctrl_handler_free(&usbtv->ctrl); 878 kfree(usbtv); 879 } 880 881 int usbtv_video_init(struct usbtv *usbtv) 882 { 883 int ret; 884 885 (void)usbtv_configure_for_norm(usbtv, V4L2_STD_525_60); 886 887 spin_lock_init(&usbtv->buflock); 888 mutex_init(&usbtv->v4l2_lock); 889 mutex_init(&usbtv->vb2q_lock); 890 INIT_LIST_HEAD(&usbtv->bufs); 891 892 /* videobuf2 structure */ 893 usbtv->vb2q.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 894 usbtv->vb2q.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ; 895 usbtv->vb2q.drv_priv = usbtv; 896 usbtv->vb2q.buf_struct_size = sizeof(struct usbtv_buf); 897 usbtv->vb2q.ops = &usbtv_vb2_ops; 898 usbtv->vb2q.mem_ops = &vb2_vmalloc_memops; 899 usbtv->vb2q.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 900 usbtv->vb2q.lock = &usbtv->vb2q_lock; 901 ret = vb2_queue_init(&usbtv->vb2q); 902 if (ret < 0) { 903 dev_warn(usbtv->dev, "Could not initialize videobuf2 queue\n"); 904 return ret; 905 } 906 907 /* controls */ 908 v4l2_ctrl_handler_init(&usbtv->ctrl, 4); 909 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, 910 V4L2_CID_CONTRAST, 0, 0x3ff, 1, 0x1d0); 911 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, 912 V4L2_CID_BRIGHTNESS, 0, 0x3ff, 1, 0x1c0); 913 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, 914 V4L2_CID_SATURATION, 0, 0x3ff, 1, 0x200); 915 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, 916 V4L2_CID_HUE, -0xdff, 0xdff, 1, 0x000); 917 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, 918 V4L2_CID_SHARPNESS, 0x0, 0xff, 1, 0x60); 919 ret = usbtv->ctrl.error; 920 if (ret < 0) { 921 dev_warn(usbtv->dev, "Could not initialize controls\n"); 922 goto ctrl_fail; 923 } 924 925 /* v4l2 structure */ 926 usbtv->v4l2_dev.ctrl_handler = &usbtv->ctrl; 927 usbtv->v4l2_dev.release = usbtv_release; 928 ret = v4l2_device_register(usbtv->dev, &usbtv->v4l2_dev); 929 if (ret < 0) { 930 dev_warn(usbtv->dev, "Could not register v4l2 device\n"); 931 goto v4l2_fail; 932 } 933 934 /* Video structure */ 935 strscpy(usbtv->vdev.name, "usbtv", sizeof(usbtv->vdev.name)); 936 usbtv->vdev.v4l2_dev = &usbtv->v4l2_dev; 937 usbtv->vdev.release = video_device_release_empty; 938 usbtv->vdev.fops = &usbtv_fops; 939 usbtv->vdev.ioctl_ops = &usbtv_ioctl_ops; 940 usbtv->vdev.tvnorms = USBTV_TV_STD; 941 usbtv->vdev.queue = &usbtv->vb2q; 942 usbtv->vdev.lock = &usbtv->v4l2_lock; 943 usbtv->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | 944 V4L2_CAP_STREAMING; 945 video_set_drvdata(&usbtv->vdev, usbtv); 946 ret = video_register_device(&usbtv->vdev, VFL_TYPE_VIDEO, -1); 947 if (ret < 0) { 948 dev_warn(usbtv->dev, "Could not register video device\n"); 949 goto vdev_fail; 950 } 951 952 return 0; 953 954 vdev_fail: 955 v4l2_device_unregister(&usbtv->v4l2_dev); 956 v4l2_fail: 957 ctrl_fail: 958 v4l2_ctrl_handler_free(&usbtv->ctrl); 959 960 return ret; 961 } 962 963 void usbtv_video_free(struct usbtv *usbtv) 964 { 965 vb2_video_unregister_device(&usbtv->vdev); 966 v4l2_device_disconnect(&usbtv->v4l2_dev); 967 968 v4l2_device_put(&usbtv->v4l2_dev); 969 } 970