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 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 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 /* Fallback to automatic detection for other standards */ 140 return 0x0000; 141 } 142 143 static int usbtv_select_norm(struct usbtv *usbtv, v4l2_std_id norm) 144 { 145 int ret; 146 /* These are the series of register values used to configure the 147 * decoder for a specific standard. 148 * The first 21 register writes are copied from the 149 * Settings\DecoderDefaults registry keys present in the Windows driver 150 * .INF file, and control various image tuning parameters (color 151 * correction, sharpness, ...). 152 */ 153 static const u16 pal[][2] = { 154 /* "AVPAL" tuning sequence from .INF file */ 155 { USBTV_BASE + 0x0003, 0x0004 }, 156 { USBTV_BASE + 0x001a, 0x0068 }, 157 { USBTV_BASE + 0x0100, 0x00d3 }, 158 { USBTV_BASE + 0x010e, 0x0072 }, 159 { USBTV_BASE + 0x010f, 0x00a2 }, 160 { USBTV_BASE + 0x0112, 0x00b0 }, 161 { USBTV_BASE + 0x0115, 0x0015 }, 162 { USBTV_BASE + 0x0117, 0x0001 }, 163 { USBTV_BASE + 0x0118, 0x002c }, 164 { USBTV_BASE + 0x012d, 0x0010 }, 165 { USBTV_BASE + 0x012f, 0x0020 }, 166 { USBTV_BASE + 0x0220, 0x002e }, 167 { USBTV_BASE + 0x0225, 0x0008 }, 168 { USBTV_BASE + 0x024e, 0x0002 }, 169 { USBTV_BASE + 0x024f, 0x0002 }, 170 { USBTV_BASE + 0x0254, 0x0059 }, 171 { USBTV_BASE + 0x025a, 0x0016 }, 172 { USBTV_BASE + 0x025b, 0x0035 }, 173 { USBTV_BASE + 0x0263, 0x0017 }, 174 { USBTV_BASE + 0x0266, 0x0016 }, 175 { USBTV_BASE + 0x0267, 0x0036 }, 176 /* End image tuning */ 177 { USBTV_BASE + 0x024e, 0x0002 }, 178 { USBTV_BASE + 0x024f, 0x0002 }, 179 }; 180 181 static const u16 ntsc[][2] = { 182 /* "AVNTSC" tuning sequence from .INF file */ 183 { USBTV_BASE + 0x0003, 0x0004 }, 184 { USBTV_BASE + 0x001a, 0x0079 }, 185 { USBTV_BASE + 0x0100, 0x00d3 }, 186 { USBTV_BASE + 0x010e, 0x0068 }, 187 { USBTV_BASE + 0x010f, 0x009c }, 188 { USBTV_BASE + 0x0112, 0x00f0 }, 189 { USBTV_BASE + 0x0115, 0x0015 }, 190 { USBTV_BASE + 0x0117, 0x0000 }, 191 { USBTV_BASE + 0x0118, 0x00fc }, 192 { USBTV_BASE + 0x012d, 0x0004 }, 193 { USBTV_BASE + 0x012f, 0x0008 }, 194 { USBTV_BASE + 0x0220, 0x002e }, 195 { USBTV_BASE + 0x0225, 0x0008 }, 196 { USBTV_BASE + 0x024e, 0x0002 }, 197 { USBTV_BASE + 0x024f, 0x0001 }, 198 { USBTV_BASE + 0x0254, 0x005f }, 199 { USBTV_BASE + 0x025a, 0x0012 }, 200 { USBTV_BASE + 0x025b, 0x0001 }, 201 { USBTV_BASE + 0x0263, 0x001c }, 202 { USBTV_BASE + 0x0266, 0x0011 }, 203 { USBTV_BASE + 0x0267, 0x0005 }, 204 /* End image tuning */ 205 { USBTV_BASE + 0x024e, 0x0002 }, 206 { USBTV_BASE + 0x024f, 0x0002 }, 207 }; 208 209 static const u16 secam[][2] = { 210 /* "AVSECAM" tuning sequence from .INF file */ 211 { USBTV_BASE + 0x0003, 0x0004 }, 212 { USBTV_BASE + 0x001a, 0x0073 }, 213 { USBTV_BASE + 0x0100, 0x00dc }, 214 { USBTV_BASE + 0x010e, 0x0072 }, 215 { USBTV_BASE + 0x010f, 0x00a2 }, 216 { USBTV_BASE + 0x0112, 0x0090 }, 217 { USBTV_BASE + 0x0115, 0x0035 }, 218 { USBTV_BASE + 0x0117, 0x0001 }, 219 { USBTV_BASE + 0x0118, 0x0030 }, 220 { USBTV_BASE + 0x012d, 0x0004 }, 221 { USBTV_BASE + 0x012f, 0x0008 }, 222 { USBTV_BASE + 0x0220, 0x002d }, 223 { USBTV_BASE + 0x0225, 0x0028 }, 224 { USBTV_BASE + 0x024e, 0x0008 }, 225 { USBTV_BASE + 0x024f, 0x0002 }, 226 { USBTV_BASE + 0x0254, 0x0069 }, 227 { USBTV_BASE + 0x025a, 0x0016 }, 228 { USBTV_BASE + 0x025b, 0x0035 }, 229 { USBTV_BASE + 0x0263, 0x0021 }, 230 { USBTV_BASE + 0x0266, 0x0016 }, 231 { USBTV_BASE + 0x0267, 0x0036 }, 232 /* End image tuning */ 233 { USBTV_BASE + 0x024e, 0x0002 }, 234 { USBTV_BASE + 0x024f, 0x0002 }, 235 }; 236 237 ret = usbtv_configure_for_norm(usbtv, norm); 238 239 if (!ret) { 240 /* Masks for norms using a NTSC or PAL color encoding. */ 241 static const v4l2_std_id ntsc_mask = 242 V4L2_STD_NTSC | V4L2_STD_NTSC_443; 243 static const v4l2_std_id pal_mask = 244 V4L2_STD_PAL | V4L2_STD_PAL_60 | V4L2_STD_PAL_M; 245 246 if (norm & ntsc_mask) 247 ret = usbtv_set_regs(usbtv, ntsc, ARRAY_SIZE(ntsc)); 248 else if (norm & pal_mask) 249 ret = usbtv_set_regs(usbtv, pal, ARRAY_SIZE(pal)); 250 else if (norm & V4L2_STD_SECAM) 251 ret = usbtv_set_regs(usbtv, secam, ARRAY_SIZE(secam)); 252 else 253 ret = -EINVAL; 254 } 255 256 if (!ret) { 257 /* Configure the decoder for the color standard */ 258 const u16 cfg[][2] = { 259 { USBTV_BASE + 0x016f, usbtv_norm_to_16f_reg(norm) } 260 }; 261 ret = usbtv_set_regs(usbtv, cfg, ARRAY_SIZE(cfg)); 262 } 263 264 return ret; 265 } 266 267 static int usbtv_setup_capture(struct usbtv *usbtv) 268 { 269 int ret; 270 static const u16 setup[][2] = { 271 /* These seem to enable the device. */ 272 { USBTV_BASE + 0x0008, 0x0001 }, 273 { USBTV_BASE + 0x01d0, 0x00ff }, 274 { USBTV_BASE + 0x01d9, 0x0002 }, 275 276 /* These seem to influence color parameters, such as 277 * brightness, etc. */ 278 { USBTV_BASE + 0x0239, 0x0040 }, 279 { USBTV_BASE + 0x0240, 0x0000 }, 280 { USBTV_BASE + 0x0241, 0x0000 }, 281 { USBTV_BASE + 0x0242, 0x0002 }, 282 { USBTV_BASE + 0x0243, 0x0080 }, 283 { USBTV_BASE + 0x0244, 0x0012 }, 284 { USBTV_BASE + 0x0245, 0x0090 }, 285 { USBTV_BASE + 0x0246, 0x0000 }, 286 287 { USBTV_BASE + 0x0278, 0x002d }, 288 { USBTV_BASE + 0x0279, 0x000a }, 289 { USBTV_BASE + 0x027a, 0x0032 }, 290 { 0xf890, 0x000c }, 291 { 0xf894, 0x0086 }, 292 293 { USBTV_BASE + 0x00ac, 0x00c0 }, 294 { USBTV_BASE + 0x00ad, 0x0000 }, 295 { USBTV_BASE + 0x00a2, 0x0012 }, 296 { USBTV_BASE + 0x00a3, 0x00e0 }, 297 { USBTV_BASE + 0x00a4, 0x0028 }, 298 { USBTV_BASE + 0x00a5, 0x0082 }, 299 { USBTV_BASE + 0x00a7, 0x0080 }, 300 { USBTV_BASE + 0x0000, 0x0014 }, 301 { USBTV_BASE + 0x0006, 0x0003 }, 302 { USBTV_BASE + 0x0090, 0x0099 }, 303 { USBTV_BASE + 0x0091, 0x0090 }, 304 { USBTV_BASE + 0x0094, 0x0068 }, 305 { USBTV_BASE + 0x0095, 0x0070 }, 306 { USBTV_BASE + 0x009c, 0x0030 }, 307 { USBTV_BASE + 0x009d, 0x00c0 }, 308 { USBTV_BASE + 0x009e, 0x00e0 }, 309 { USBTV_BASE + 0x0019, 0x0006 }, 310 { USBTV_BASE + 0x008c, 0x00ba }, 311 { USBTV_BASE + 0x0101, 0x00ff }, 312 { USBTV_BASE + 0x010c, 0x00b3 }, 313 { USBTV_BASE + 0x01b2, 0x0080 }, 314 { USBTV_BASE + 0x01b4, 0x00a0 }, 315 { USBTV_BASE + 0x014c, 0x00ff }, 316 { USBTV_BASE + 0x014d, 0x00ca }, 317 { USBTV_BASE + 0x0113, 0x0053 }, 318 { USBTV_BASE + 0x0119, 0x008a }, 319 { USBTV_BASE + 0x013c, 0x0003 }, 320 { USBTV_BASE + 0x0150, 0x009c }, 321 { USBTV_BASE + 0x0151, 0x0071 }, 322 { USBTV_BASE + 0x0152, 0x00c6 }, 323 { USBTV_BASE + 0x0153, 0x0084 }, 324 { USBTV_BASE + 0x0154, 0x00bc }, 325 { USBTV_BASE + 0x0155, 0x00a0 }, 326 { USBTV_BASE + 0x0156, 0x00a0 }, 327 { USBTV_BASE + 0x0157, 0x009c }, 328 { USBTV_BASE + 0x0158, 0x001f }, 329 { USBTV_BASE + 0x0159, 0x0006 }, 330 { USBTV_BASE + 0x015d, 0x0000 }, 331 }; 332 333 ret = usbtv_set_regs(usbtv, setup, ARRAY_SIZE(setup)); 334 if (ret) 335 return ret; 336 337 ret = usbtv_select_norm(usbtv, usbtv->norm); 338 if (ret) 339 return ret; 340 341 ret = usbtv_select_input(usbtv, usbtv->input); 342 if (ret) 343 return ret; 344 345 ret = v4l2_ctrl_handler_setup(&usbtv->ctrl); 346 if (ret) 347 return ret; 348 349 return 0; 350 } 351 352 /* Copy data from chunk into a frame buffer, deinterlacing the data 353 * into every second line. Unfortunately, they don't align nicely into 354 * 720 pixel lines, as the chunk is 240 words long, which is 480 pixels. 355 * Therefore, we break down the chunk into two halves before copying, 356 * so that we can interleave a line if needed. 357 * 358 * Each "chunk" is 240 words; a word in this context equals 4 bytes. 359 * Image format is YUYV/YUV 4:2:2, consisting of Y Cr Y Cb, defining two 360 * pixels, the Cr and Cb shared between the two pixels, but each having 361 * separate Y values. Thus, the 240 words equal 480 pixels. It therefore, 362 * takes 1.5 chunks to make a 720 pixel-wide line for the frame. 363 * The image is interlaced, so there is a "scan" of odd lines, followed 364 * by "scan" of even numbered lines. 365 * 366 * Following code is writing the chunks in correct sequence, skipping 367 * the rows based on "odd" value. 368 * line 1: chunk[0][ 0..479] chunk[0][480..959] chunk[1][ 0..479] 369 * line 3: chunk[1][480..959] chunk[2][ 0..479] chunk[2][480..959] 370 * ...etc. 371 */ 372 static void usbtv_chunk_to_vbuf(u32 *frame, __be32 *src, int chunk_no, int odd) 373 { 374 int half; 375 376 for (half = 0; half < 2; half++) { 377 int part_no = chunk_no * 2 + half; 378 int line = part_no / 3; 379 int part_index = (line * 2 + !odd) * 3 + (part_no % 3); 380 381 u32 *dst = &frame[part_index * USBTV_CHUNK/2]; 382 383 memcpy(dst, src, USBTV_CHUNK/2 * sizeof(*src)); 384 src += USBTV_CHUNK/2; 385 } 386 } 387 388 /* Called for each 256-byte image chunk. 389 * First word identifies the chunk, followed by 240 words of image 390 * data and padding. */ 391 static void usbtv_image_chunk(struct usbtv *usbtv, __be32 *chunk) 392 { 393 int frame_id, odd, chunk_no; 394 u32 *frame; 395 struct usbtv_buf *buf; 396 unsigned long flags; 397 398 /* Ignore corrupted lines. */ 399 if (!USBTV_MAGIC_OK(chunk)) 400 return; 401 frame_id = USBTV_FRAME_ID(chunk); 402 odd = USBTV_ODD(chunk); 403 chunk_no = USBTV_CHUNK_NO(chunk); 404 if (chunk_no >= usbtv->n_chunks) 405 return; 406 407 /* Beginning of a frame. */ 408 if (chunk_no == 0) { 409 usbtv->frame_id = frame_id; 410 usbtv->chunks_done = 0; 411 } 412 413 if (usbtv->frame_id != frame_id) 414 return; 415 416 spin_lock_irqsave(&usbtv->buflock, flags); 417 if (list_empty(&usbtv->bufs)) { 418 /* No free buffers. Userspace likely too slow. */ 419 spin_unlock_irqrestore(&usbtv->buflock, flags); 420 return; 421 } 422 423 /* First available buffer. */ 424 buf = list_first_entry(&usbtv->bufs, struct usbtv_buf, list); 425 frame = vb2_plane_vaddr(&buf->vb.vb2_buf, 0); 426 427 /* Copy the chunk data. */ 428 usbtv_chunk_to_vbuf(frame, &chunk[1], chunk_no, odd); 429 usbtv->chunks_done++; 430 431 /* Last chunk in a field */ 432 if (chunk_no == usbtv->n_chunks-1) { 433 /* Last chunk in a frame, signalling an end */ 434 if (odd && !usbtv->last_odd) { 435 int size = vb2_plane_size(&buf->vb.vb2_buf, 0); 436 enum vb2_buffer_state state = usbtv->chunks_done == 437 usbtv->n_chunks ? 438 VB2_BUF_STATE_DONE : 439 VB2_BUF_STATE_ERROR; 440 441 buf->vb.field = V4L2_FIELD_INTERLACED; 442 buf->vb.sequence = usbtv->sequence++; 443 buf->vb.vb2_buf.timestamp = ktime_get_ns(); 444 vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size); 445 vb2_buffer_done(&buf->vb.vb2_buf, state); 446 list_del(&buf->list); 447 } 448 usbtv->last_odd = odd; 449 } 450 451 spin_unlock_irqrestore(&usbtv->buflock, flags); 452 } 453 454 /* Got image data. Each packet contains a number of 256-word chunks we 455 * compose the image from. */ 456 static void usbtv_iso_cb(struct urb *ip) 457 { 458 int ret; 459 int i; 460 struct usbtv *usbtv = (struct usbtv *)ip->context; 461 462 switch (ip->status) { 463 /* All fine. */ 464 case 0: 465 break; 466 /* Device disconnected or capture stopped? */ 467 case -ENODEV: 468 case -ENOENT: 469 case -ECONNRESET: 470 case -ESHUTDOWN: 471 return; 472 /* Unknown error. Retry. */ 473 default: 474 dev_warn(usbtv->dev, "Bad response for ISO request.\n"); 475 goto resubmit; 476 } 477 478 for (i = 0; i < ip->number_of_packets; i++) { 479 int size = ip->iso_frame_desc[i].actual_length; 480 unsigned char *data = ip->transfer_buffer + 481 ip->iso_frame_desc[i].offset; 482 int offset; 483 484 for (offset = 0; USBTV_CHUNK_SIZE * offset < size; offset++) 485 usbtv_image_chunk(usbtv, 486 (__be32 *)&data[USBTV_CHUNK_SIZE * offset]); 487 } 488 489 resubmit: 490 ret = usb_submit_urb(ip, GFP_ATOMIC); 491 if (ret < 0) 492 dev_warn(usbtv->dev, "Could not resubmit ISO URB\n"); 493 } 494 495 static struct urb *usbtv_setup_iso_transfer(struct usbtv *usbtv) 496 { 497 struct urb *ip; 498 int size = usbtv->iso_size; 499 int i; 500 501 ip = usb_alloc_urb(USBTV_ISOC_PACKETS, GFP_KERNEL); 502 if (ip == NULL) 503 return NULL; 504 505 ip->dev = usbtv->udev; 506 ip->context = usbtv; 507 ip->pipe = usb_rcvisocpipe(usbtv->udev, USBTV_VIDEO_ENDP); 508 ip->interval = 1; 509 ip->transfer_flags = URB_ISO_ASAP; 510 ip->transfer_buffer = kcalloc(USBTV_ISOC_PACKETS, size, 511 GFP_KERNEL); 512 if (!ip->transfer_buffer) { 513 usb_free_urb(ip); 514 return NULL; 515 } 516 ip->complete = usbtv_iso_cb; 517 ip->number_of_packets = USBTV_ISOC_PACKETS; 518 ip->transfer_buffer_length = size * USBTV_ISOC_PACKETS; 519 for (i = 0; i < USBTV_ISOC_PACKETS; i++) { 520 ip->iso_frame_desc[i].offset = size * i; 521 ip->iso_frame_desc[i].length = size; 522 } 523 524 return ip; 525 } 526 527 static void usbtv_stop(struct usbtv *usbtv) 528 { 529 int i; 530 unsigned long flags; 531 532 /* Cancel running transfers. */ 533 for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) { 534 struct urb *ip = usbtv->isoc_urbs[i]; 535 536 if (ip == NULL) 537 continue; 538 usb_kill_urb(ip); 539 kfree(ip->transfer_buffer); 540 usb_free_urb(ip); 541 usbtv->isoc_urbs[i] = NULL; 542 } 543 544 /* Return buffers to userspace. */ 545 spin_lock_irqsave(&usbtv->buflock, flags); 546 while (!list_empty(&usbtv->bufs)) { 547 struct usbtv_buf *buf = list_first_entry(&usbtv->bufs, 548 struct usbtv_buf, list); 549 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 550 list_del(&buf->list); 551 } 552 spin_unlock_irqrestore(&usbtv->buflock, flags); 553 } 554 555 static int usbtv_start(struct usbtv *usbtv) 556 { 557 int i; 558 int ret; 559 560 usbtv_audio_suspend(usbtv); 561 562 ret = usb_set_interface(usbtv->udev, 0, 0); 563 if (ret < 0) 564 return ret; 565 566 ret = usbtv_setup_capture(usbtv); 567 if (ret < 0) 568 return ret; 569 570 ret = usb_set_interface(usbtv->udev, 0, 1); 571 if (ret < 0) 572 return ret; 573 574 usbtv_audio_resume(usbtv); 575 576 for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) { 577 struct urb *ip; 578 579 ip = usbtv_setup_iso_transfer(usbtv); 580 if (ip == NULL) { 581 ret = -ENOMEM; 582 goto start_fail; 583 } 584 usbtv->isoc_urbs[i] = ip; 585 586 ret = usb_submit_urb(ip, GFP_KERNEL); 587 if (ret < 0) 588 goto start_fail; 589 } 590 591 return 0; 592 593 start_fail: 594 usbtv_stop(usbtv); 595 return ret; 596 } 597 598 static int usbtv_querycap(struct file *file, void *priv, 599 struct v4l2_capability *cap) 600 { 601 struct usbtv *dev = video_drvdata(file); 602 603 strscpy(cap->driver, "usbtv", sizeof(cap->driver)); 604 strscpy(cap->card, "usbtv", sizeof(cap->card)); 605 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); 606 return 0; 607 } 608 609 static int usbtv_enum_input(struct file *file, void *priv, 610 struct v4l2_input *i) 611 { 612 struct usbtv *dev = video_drvdata(file); 613 614 switch (i->index) { 615 case USBTV_COMPOSITE_INPUT: 616 strscpy(i->name, "Composite", sizeof(i->name)); 617 break; 618 case USBTV_SVIDEO_INPUT: 619 strscpy(i->name, "S-Video", sizeof(i->name)); 620 break; 621 default: 622 return -EINVAL; 623 } 624 625 i->type = V4L2_INPUT_TYPE_CAMERA; 626 i->std = dev->vdev.tvnorms; 627 return 0; 628 } 629 630 static int usbtv_enum_fmt_vid_cap(struct file *file, void *priv, 631 struct v4l2_fmtdesc *f) 632 { 633 if (f->index > 0) 634 return -EINVAL; 635 636 f->pixelformat = V4L2_PIX_FMT_YUYV; 637 return 0; 638 } 639 640 static int usbtv_fmt_vid_cap(struct file *file, void *priv, 641 struct v4l2_format *f) 642 { 643 struct usbtv *usbtv = video_drvdata(file); 644 645 f->fmt.pix.width = usbtv->width; 646 f->fmt.pix.height = usbtv->height; 647 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; 648 f->fmt.pix.field = V4L2_FIELD_INTERLACED; 649 f->fmt.pix.bytesperline = usbtv->width * 2; 650 f->fmt.pix.sizeimage = (f->fmt.pix.bytesperline * f->fmt.pix.height); 651 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 652 653 return 0; 654 } 655 656 static int usbtv_g_std(struct file *file, void *priv, v4l2_std_id *norm) 657 { 658 struct usbtv *usbtv = video_drvdata(file); 659 *norm = usbtv->norm; 660 return 0; 661 } 662 663 static int usbtv_s_std(struct file *file, void *priv, v4l2_std_id norm) 664 { 665 int ret = -EINVAL; 666 struct usbtv *usbtv = video_drvdata(file); 667 668 if (norm & USBTV_TV_STD) 669 ret = usbtv_select_norm(usbtv, norm); 670 671 return ret; 672 } 673 674 static int usbtv_g_input(struct file *file, void *priv, unsigned int *i) 675 { 676 struct usbtv *usbtv = video_drvdata(file); 677 *i = usbtv->input; 678 return 0; 679 } 680 681 static int usbtv_s_input(struct file *file, void *priv, unsigned int i) 682 { 683 struct usbtv *usbtv = video_drvdata(file); 684 685 return usbtv_select_input(usbtv, i); 686 } 687 688 static struct v4l2_ioctl_ops usbtv_ioctl_ops = { 689 .vidioc_querycap = usbtv_querycap, 690 .vidioc_enum_input = usbtv_enum_input, 691 .vidioc_enum_fmt_vid_cap = usbtv_enum_fmt_vid_cap, 692 .vidioc_g_fmt_vid_cap = usbtv_fmt_vid_cap, 693 .vidioc_try_fmt_vid_cap = usbtv_fmt_vid_cap, 694 .vidioc_s_fmt_vid_cap = usbtv_fmt_vid_cap, 695 .vidioc_g_std = usbtv_g_std, 696 .vidioc_s_std = usbtv_s_std, 697 .vidioc_g_input = usbtv_g_input, 698 .vidioc_s_input = usbtv_s_input, 699 700 .vidioc_reqbufs = vb2_ioctl_reqbufs, 701 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 702 .vidioc_querybuf = vb2_ioctl_querybuf, 703 .vidioc_create_bufs = vb2_ioctl_create_bufs, 704 .vidioc_qbuf = vb2_ioctl_qbuf, 705 .vidioc_dqbuf = vb2_ioctl_dqbuf, 706 .vidioc_streamon = vb2_ioctl_streamon, 707 .vidioc_streamoff = vb2_ioctl_streamoff, 708 }; 709 710 static const struct v4l2_file_operations usbtv_fops = { 711 .owner = THIS_MODULE, 712 .unlocked_ioctl = video_ioctl2, 713 .mmap = vb2_fop_mmap, 714 .open = v4l2_fh_open, 715 .release = vb2_fop_release, 716 .read = vb2_fop_read, 717 .poll = vb2_fop_poll, 718 }; 719 720 static int usbtv_queue_setup(struct vb2_queue *vq, 721 unsigned int *nbuffers, 722 unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[]) 723 { 724 struct usbtv *usbtv = vb2_get_drv_priv(vq); 725 unsigned size = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32); 726 727 if (vq->num_buffers + *nbuffers < 2) 728 *nbuffers = 2 - vq->num_buffers; 729 if (*nplanes) 730 return sizes[0] < size ? -EINVAL : 0; 731 *nplanes = 1; 732 sizes[0] = size; 733 734 return 0; 735 } 736 737 static void usbtv_buf_queue(struct vb2_buffer *vb) 738 { 739 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 740 struct usbtv *usbtv = vb2_get_drv_priv(vb->vb2_queue); 741 struct usbtv_buf *buf = container_of(vbuf, struct usbtv_buf, vb); 742 unsigned long flags; 743 744 if (usbtv->udev == NULL) { 745 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); 746 return; 747 } 748 749 spin_lock_irqsave(&usbtv->buflock, flags); 750 list_add_tail(&buf->list, &usbtv->bufs); 751 spin_unlock_irqrestore(&usbtv->buflock, flags); 752 } 753 754 static int usbtv_start_streaming(struct vb2_queue *vq, unsigned int count) 755 { 756 struct usbtv *usbtv = vb2_get_drv_priv(vq); 757 758 if (usbtv->udev == NULL) 759 return -ENODEV; 760 761 usbtv->last_odd = 1; 762 usbtv->sequence = 0; 763 return usbtv_start(usbtv); 764 } 765 766 static void usbtv_stop_streaming(struct vb2_queue *vq) 767 { 768 struct usbtv *usbtv = vb2_get_drv_priv(vq); 769 770 if (usbtv->udev) 771 usbtv_stop(usbtv); 772 } 773 774 static const struct vb2_ops usbtv_vb2_ops = { 775 .queue_setup = usbtv_queue_setup, 776 .buf_queue = usbtv_buf_queue, 777 .start_streaming = usbtv_start_streaming, 778 .stop_streaming = usbtv_stop_streaming, 779 .wait_prepare = vb2_ops_wait_prepare, 780 .wait_finish = vb2_ops_wait_finish, 781 }; 782 783 static int usbtv_s_ctrl(struct v4l2_ctrl *ctrl) 784 { 785 struct usbtv *usbtv = container_of(ctrl->handler, struct usbtv, 786 ctrl); 787 u8 *data; 788 u16 index, size; 789 int ret; 790 791 data = kmalloc(3, GFP_KERNEL); 792 if (!data) 793 return -ENOMEM; 794 795 /* 796 * Read in the current brightness/contrast registers. We need them 797 * both, because the values are for some reason interleaved. 798 */ 799 if (ctrl->id == V4L2_CID_BRIGHTNESS || ctrl->id == V4L2_CID_CONTRAST) { 800 ret = usb_control_msg(usbtv->udev, 801 usb_rcvctrlpipe(usbtv->udev, 0), USBTV_CONTROL_REG, 802 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 803 0, USBTV_BASE + 0x0244, (void *)data, 3, 0); 804 if (ret < 0) 805 goto error; 806 } 807 808 switch (ctrl->id) { 809 case V4L2_CID_BRIGHTNESS: 810 index = USBTV_BASE + 0x0244; 811 size = 3; 812 data[0] &= 0xf0; 813 data[0] |= (ctrl->val >> 8) & 0xf; 814 data[2] = ctrl->val & 0xff; 815 break; 816 case V4L2_CID_CONTRAST: 817 index = USBTV_BASE + 0x0244; 818 size = 3; 819 data[0] &= 0x0f; 820 data[0] |= (ctrl->val >> 4) & 0xf0; 821 data[1] = ctrl->val & 0xff; 822 break; 823 case V4L2_CID_SATURATION: 824 index = USBTV_BASE + 0x0242; 825 data[0] = ctrl->val >> 8; 826 data[1] = ctrl->val & 0xff; 827 size = 2; 828 break; 829 case V4L2_CID_HUE: 830 index = USBTV_BASE + 0x0240; 831 size = 2; 832 if (ctrl->val > 0) { 833 data[0] = 0x92 + (ctrl->val >> 8); 834 data[1] = ctrl->val & 0xff; 835 } else { 836 data[0] = 0x82 + (-ctrl->val >> 8); 837 data[1] = -ctrl->val & 0xff; 838 } 839 break; 840 case V4L2_CID_SHARPNESS: 841 index = USBTV_BASE + 0x0239; 842 data[0] = 0; 843 data[1] = ctrl->val; 844 size = 2; 845 break; 846 default: 847 kfree(data); 848 return -EINVAL; 849 } 850 851 ret = usb_control_msg(usbtv->udev, usb_sndctrlpipe(usbtv->udev, 0), 852 USBTV_CONTROL_REG, 853 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 854 0, index, (void *)data, size, 0); 855 856 error: 857 if (ret < 0) 858 dev_warn(usbtv->dev, "Failed to submit a control request.\n"); 859 860 kfree(data); 861 return ret; 862 } 863 864 static const struct v4l2_ctrl_ops usbtv_ctrl_ops = { 865 .s_ctrl = usbtv_s_ctrl, 866 }; 867 868 static void usbtv_release(struct v4l2_device *v4l2_dev) 869 { 870 struct usbtv *usbtv = container_of(v4l2_dev, struct usbtv, v4l2_dev); 871 872 v4l2_device_unregister(&usbtv->v4l2_dev); 873 v4l2_ctrl_handler_free(&usbtv->ctrl); 874 vb2_queue_release(&usbtv->vb2q); 875 kfree(usbtv); 876 } 877 878 int usbtv_video_init(struct usbtv *usbtv) 879 { 880 int ret; 881 882 (void)usbtv_configure_for_norm(usbtv, V4L2_STD_525_60); 883 884 spin_lock_init(&usbtv->buflock); 885 mutex_init(&usbtv->v4l2_lock); 886 mutex_init(&usbtv->vb2q_lock); 887 INIT_LIST_HEAD(&usbtv->bufs); 888 889 /* videobuf2 structure */ 890 usbtv->vb2q.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 891 usbtv->vb2q.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ; 892 usbtv->vb2q.drv_priv = usbtv; 893 usbtv->vb2q.buf_struct_size = sizeof(struct usbtv_buf); 894 usbtv->vb2q.ops = &usbtv_vb2_ops; 895 usbtv->vb2q.mem_ops = &vb2_vmalloc_memops; 896 usbtv->vb2q.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 897 usbtv->vb2q.lock = &usbtv->vb2q_lock; 898 ret = vb2_queue_init(&usbtv->vb2q); 899 if (ret < 0) { 900 dev_warn(usbtv->dev, "Could not initialize videobuf2 queue\n"); 901 return ret; 902 } 903 904 /* controls */ 905 v4l2_ctrl_handler_init(&usbtv->ctrl, 4); 906 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, 907 V4L2_CID_CONTRAST, 0, 0x3ff, 1, 0x1d0); 908 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, 909 V4L2_CID_BRIGHTNESS, 0, 0x3ff, 1, 0x1c0); 910 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, 911 V4L2_CID_SATURATION, 0, 0x3ff, 1, 0x200); 912 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, 913 V4L2_CID_HUE, -0xdff, 0xdff, 1, 0x000); 914 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, 915 V4L2_CID_SHARPNESS, 0x0, 0xff, 1, 0x60); 916 ret = usbtv->ctrl.error; 917 if (ret < 0) { 918 dev_warn(usbtv->dev, "Could not initialize controls\n"); 919 goto ctrl_fail; 920 } 921 922 /* v4l2 structure */ 923 usbtv->v4l2_dev.ctrl_handler = &usbtv->ctrl; 924 usbtv->v4l2_dev.release = usbtv_release; 925 ret = v4l2_device_register(usbtv->dev, &usbtv->v4l2_dev); 926 if (ret < 0) { 927 dev_warn(usbtv->dev, "Could not register v4l2 device\n"); 928 goto v4l2_fail; 929 } 930 931 /* Video structure */ 932 strscpy(usbtv->vdev.name, "usbtv", sizeof(usbtv->vdev.name)); 933 usbtv->vdev.v4l2_dev = &usbtv->v4l2_dev; 934 usbtv->vdev.release = video_device_release_empty; 935 usbtv->vdev.fops = &usbtv_fops; 936 usbtv->vdev.ioctl_ops = &usbtv_ioctl_ops; 937 usbtv->vdev.tvnorms = USBTV_TV_STD; 938 usbtv->vdev.queue = &usbtv->vb2q; 939 usbtv->vdev.lock = &usbtv->v4l2_lock; 940 usbtv->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | 941 V4L2_CAP_STREAMING; 942 video_set_drvdata(&usbtv->vdev, usbtv); 943 ret = video_register_device(&usbtv->vdev, VFL_TYPE_GRABBER, -1); 944 if (ret < 0) { 945 dev_warn(usbtv->dev, "Could not register video device\n"); 946 goto vdev_fail; 947 } 948 949 return 0; 950 951 vdev_fail: 952 v4l2_device_unregister(&usbtv->v4l2_dev); 953 v4l2_fail: 954 ctrl_fail: 955 v4l2_ctrl_handler_free(&usbtv->ctrl); 956 vb2_queue_release(&usbtv->vb2q); 957 958 return ret; 959 } 960 961 void usbtv_video_free(struct usbtv *usbtv) 962 { 963 mutex_lock(&usbtv->vb2q_lock); 964 mutex_lock(&usbtv->v4l2_lock); 965 966 usbtv_stop(usbtv); 967 video_unregister_device(&usbtv->vdev); 968 v4l2_device_disconnect(&usbtv->v4l2_dev); 969 970 mutex_unlock(&usbtv->v4l2_lock); 971 mutex_unlock(&usbtv->vb2q_lock); 972 973 v4l2_device_put(&usbtv->v4l2_dev); 974 } 975