usbvision-core.c revision 770060385a1694a8d909e7872c4ce0703da2b069
1/* 2 * usbvision-core.c - driver for NT100x USB video capture devices 3 * 4 * 5 * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de> 6 * Dwaine Garden <dwainegarden@rogers.com> 7 * 8 * This module is part of usbvision driver project. 9 * Updates to driver completed by Dwaine P. Garden 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 24 */ 25 26#include <linux/kernel.h> 27#include <linux/list.h> 28#include <linux/timer.h> 29#include <linux/slab.h> 30#include <linux/mm.h> 31#include <linux/utsname.h> 32#include <linux/highmem.h> 33#include <linux/vmalloc.h> 34#include <linux/module.h> 35#include <linux/init.h> 36#include <linux/spinlock.h> 37#include <asm/io.h> 38#include <linux/videodev2.h> 39#include <linux/i2c.h> 40 41#include <media/saa7115.h> 42#include <media/v4l2-common.h> 43#include <media/tuner.h> 44 45#include <linux/workqueue.h> 46 47#include "usbvision.h" 48 49static unsigned int core_debug; 50module_param(core_debug,int,0644); 51MODULE_PARM_DESC(core_debug,"enable debug messages [core]"); 52 53static unsigned int force_testpattern; 54module_param(force_testpattern,int,0644); 55MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]"); 56 57static int adjustCompression = 1; /* Set the compression to be adaptive */ 58module_param(adjustCompression, int, 0444); 59MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device. Default: 1 (On)"); 60 61/* To help people with Black and White output with using s-video input. 62 * Some cables and input device are wired differently. */ 63static int SwitchSVideoInput; 64module_param(SwitchSVideoInput, int, 0444); 65MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input. Some cables and input device are wired differently. Default: 0 (Off)"); 66 67static unsigned int adjust_X_Offset = -1; 68module_param(adjust_X_Offset, int, 0644); 69MODULE_PARM_DESC(adjust_X_Offset, "adjust X offset display [core]"); 70 71static unsigned int adjust_Y_Offset = -1; 72module_param(adjust_Y_Offset, int, 0644); 73MODULE_PARM_DESC(adjust_Y_Offset, "adjust Y offset display [core]"); 74 75 76#define ENABLE_HEXDUMP 0 /* Enable if you need it */ 77 78 79#ifdef USBVISION_DEBUG 80 #define PDEBUG(level, fmt, args...) { \ 81 if (core_debug & (level)) \ 82 printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \ 83 __func__, __LINE__ , ## args); \ 84 } 85#else 86 #define PDEBUG(level, fmt, args...) do {} while(0) 87#endif 88 89#define DBG_HEADER 1<<0 90#define DBG_IRQ 1<<1 91#define DBG_ISOC 1<<2 92#define DBG_PARSE 1<<3 93#define DBG_SCRATCH 1<<4 94#define DBG_FUNC 1<<5 95 96static const int max_imgwidth = MAX_FRAME_WIDTH; 97static const int max_imgheight = MAX_FRAME_HEIGHT; 98static const int min_imgwidth = MIN_FRAME_WIDTH; 99static const int min_imgheight = MIN_FRAME_HEIGHT; 100 101/* The value of 'scratch_buf_size' affects quality of the picture 102 * in many ways. Shorter buffers may cause loss of data when client 103 * is too slow. Larger buffers are memory-consuming and take longer 104 * to work with. This setting can be adjusted, but the default value 105 * should be OK for most desktop users. 106 */ 107#define DEFAULT_SCRATCH_BUF_SIZE (0x20000) // 128kB memory scratch buffer 108static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE; 109 110// Function prototypes 111static int usbvision_request_intra (struct usb_usbvision *usbvision); 112static int usbvision_unrequest_intra (struct usb_usbvision *usbvision); 113static int usbvision_adjust_compression (struct usb_usbvision *usbvision); 114static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision); 115 116/*******************************/ 117/* Memory management functions */ 118/*******************************/ 119 120/* 121 * Here we want the physical address of the memory. 122 * This is used when initializing the contents of the area. 123 */ 124 125static void *usbvision_rvmalloc(unsigned long size) 126{ 127 void *mem; 128 unsigned long adr; 129 130 size = PAGE_ALIGN(size); 131 mem = vmalloc_32(size); 132 if (!mem) 133 return NULL; 134 135 memset(mem, 0, size); /* Clear the ram out, no junk to the user */ 136 adr = (unsigned long) mem; 137 while (size > 0) { 138 SetPageReserved(vmalloc_to_page((void *)adr)); 139 adr += PAGE_SIZE; 140 size -= PAGE_SIZE; 141 } 142 143 return mem; 144} 145 146static void usbvision_rvfree(void *mem, unsigned long size) 147{ 148 unsigned long adr; 149 150 if (!mem) 151 return; 152 153 size = PAGE_ALIGN(size); 154 155 adr = (unsigned long) mem; 156 while ((long) size > 0) { 157 ClearPageReserved(vmalloc_to_page((void *)adr)); 158 adr += PAGE_SIZE; 159 size -= PAGE_SIZE; 160 } 161 162 vfree(mem); 163} 164 165 166#if ENABLE_HEXDUMP 167static void usbvision_hexdump(const unsigned char *data, int len) 168{ 169 char tmp[80]; 170 int i, k; 171 172 for (i = k = 0; len > 0; i++, len--) { 173 if (i > 0 && (i % 16 == 0)) { 174 printk("%s\n", tmp); 175 k = 0; 176 } 177 k += sprintf(&tmp[k], "%02x ", data[i]); 178 } 179 if (k > 0) 180 printk("%s\n", tmp); 181} 182#endif 183 184/******************************** 185 * scratch ring buffer handling 186 ********************************/ 187static int scratch_len(struct usb_usbvision *usbvision) /*This returns the amount of data actually in the buffer */ 188{ 189 int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr; 190 if (len < 0) { 191 len += scratch_buf_size; 192 } 193 PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len); 194 195 return len; 196} 197 198 199/* This returns the free space left in the buffer */ 200static int scratch_free(struct usb_usbvision *usbvision) 201{ 202 int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr; 203 if (free <= 0) { 204 free += scratch_buf_size; 205 } 206 if (free) { 207 free -= 1; /* at least one byte in the buffer must */ 208 /* left blank, otherwise there is no chance to differ between full and empty */ 209 } 210 PDEBUG(DBG_SCRATCH, "return %d\n", free); 211 212 return free; 213} 214 215 216/* This puts data into the buffer */ 217static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data, 218 int len) 219{ 220 int len_part; 221 222 if (usbvision->scratch_write_ptr + len < scratch_buf_size) { 223 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len); 224 usbvision->scratch_write_ptr += len; 225 } 226 else { 227 len_part = scratch_buf_size - usbvision->scratch_write_ptr; 228 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part); 229 if (len == len_part) { 230 usbvision->scratch_write_ptr = 0; /* just set write_ptr to zero */ 231 } 232 else { 233 memcpy(usbvision->scratch, data + len_part, len - len_part); 234 usbvision->scratch_write_ptr = len - len_part; 235 } 236 } 237 238 PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr); 239 240 return len; 241} 242 243/* This marks the write_ptr as position of new frame header */ 244static void scratch_mark_header(struct usb_usbvision *usbvision) 245{ 246 PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr); 247 248 usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] = 249 usbvision->scratch_write_ptr; 250 usbvision->scratch_headermarker_write_ptr += 1; 251 usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER; 252} 253 254/* This gets data from the buffer at the given "ptr" position */ 255static int scratch_get_extra(struct usb_usbvision *usbvision, 256 unsigned char *data, int *ptr, int len) 257{ 258 int len_part; 259 if (*ptr + len < scratch_buf_size) { 260 memcpy(data, usbvision->scratch + *ptr, len); 261 *ptr += len; 262 } 263 else { 264 len_part = scratch_buf_size - *ptr; 265 memcpy(data, usbvision->scratch + *ptr, len_part); 266 if (len == len_part) { 267 *ptr = 0; /* just set the y_ptr to zero */ 268 } 269 else { 270 memcpy(data + len_part, usbvision->scratch, len - len_part); 271 *ptr = len - len_part; 272 } 273 } 274 275 PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr); 276 277 return len; 278} 279 280 281/* This sets the scratch extra read pointer */ 282static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr, 283 int len) 284{ 285 *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size; 286 287 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr); 288} 289 290 291/*This increments the scratch extra read pointer */ 292static void scratch_inc_extra_ptr(int *ptr, int len) 293{ 294 *ptr = (*ptr + len) % scratch_buf_size; 295 296 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr); 297} 298 299 300/* This gets data from the buffer */ 301static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data, 302 int len) 303{ 304 int len_part; 305 if (usbvision->scratch_read_ptr + len < scratch_buf_size) { 306 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len); 307 usbvision->scratch_read_ptr += len; 308 } 309 else { 310 len_part = scratch_buf_size - usbvision->scratch_read_ptr; 311 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part); 312 if (len == len_part) { 313 usbvision->scratch_read_ptr = 0; /* just set the read_ptr to zero */ 314 } 315 else { 316 memcpy(data + len_part, usbvision->scratch, len - len_part); 317 usbvision->scratch_read_ptr = len - len_part; 318 } 319 } 320 321 PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr); 322 323 return len; 324} 325 326 327/* This sets read pointer to next header and returns it */ 328static int scratch_get_header(struct usb_usbvision *usbvision, 329 struct usbvision_frame_header *header) 330{ 331 int errCode = 0; 332 333 PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr); 334 335 while (usbvision->scratch_headermarker_write_ptr - 336 usbvision->scratch_headermarker_read_ptr != 0) { 337 usbvision->scratch_read_ptr = 338 usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr]; 339 usbvision->scratch_headermarker_read_ptr += 1; 340 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER; 341 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH); 342 if ((header->magic_1 == USBVISION_MAGIC_1) 343 && (header->magic_2 == USBVISION_MAGIC_2) 344 && (header->headerLength == USBVISION_HEADER_LENGTH)) { 345 errCode = USBVISION_HEADER_LENGTH; 346 header->frameWidth = header->frameWidthLo + (header->frameWidthHi << 8); 347 header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8); 348 break; 349 } 350 } 351 352 return errCode; 353} 354 355 356/*This removes len bytes of old data from the buffer */ 357static void scratch_rm_old(struct usb_usbvision *usbvision, int len) 358{ 359 360 usbvision->scratch_read_ptr += len; 361 usbvision->scratch_read_ptr %= scratch_buf_size; 362 PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr); 363} 364 365 366/*This resets the buffer - kills all data in it too */ 367static void scratch_reset(struct usb_usbvision *usbvision) 368{ 369 PDEBUG(DBG_SCRATCH, "\n"); 370 371 usbvision->scratch_read_ptr = 0; 372 usbvision->scratch_write_ptr = 0; 373 usbvision->scratch_headermarker_read_ptr = 0; 374 usbvision->scratch_headermarker_write_ptr = 0; 375 usbvision->isocstate = IsocState_NoFrame; 376} 377 378int usbvision_scratch_alloc(struct usb_usbvision *usbvision) 379{ 380 usbvision->scratch = vmalloc_32(scratch_buf_size); 381 scratch_reset(usbvision); 382 if(usbvision->scratch == NULL) { 383 dev_err(&usbvision->dev->dev, 384 "%s: unable to allocate %d bytes for scratch\n", 385 __func__, scratch_buf_size); 386 return -ENOMEM; 387 } 388 return 0; 389} 390 391void usbvision_scratch_free(struct usb_usbvision *usbvision) 392{ 393 if (usbvision->scratch != NULL) { 394 vfree(usbvision->scratch); 395 usbvision->scratch = NULL; 396 } 397} 398 399/* 400 * usbvision_testpattern() 401 * 402 * Procedure forms a test pattern (yellow grid on blue background). 403 * 404 * Parameters: 405 * fullframe: if TRUE then entire frame is filled, otherwise the procedure 406 * continues from the current scanline. 407 * pmode 0: fill the frame with solid blue color (like on VCR or TV) 408 * 1: Draw a colored grid 409 * 410 */ 411static void usbvision_testpattern(struct usb_usbvision *usbvision, 412 int fullframe, int pmode) 413{ 414 static const char proc[] = "usbvision_testpattern"; 415 struct usbvision_frame *frame; 416 unsigned char *f; 417 int num_cell = 0; 418 int scan_length = 0; 419 static int num_pass; 420 421 if (usbvision == NULL) { 422 printk(KERN_ERR "%s: usbvision == NULL\n", proc); 423 return; 424 } 425 if (usbvision->curFrame == NULL) { 426 printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc); 427 return; 428 } 429 430 /* Grab the current frame */ 431 frame = usbvision->curFrame; 432 433 /* Optionally start at the beginning */ 434 if (fullframe) { 435 frame->curline = 0; 436 frame->scanlength = 0; 437 } 438 439 /* Form every scan line */ 440 for (; frame->curline < frame->frmheight; frame->curline++) { 441 int i; 442 443 f = frame->data + (usbvision->curwidth * 3 * frame->curline); 444 for (i = 0; i < usbvision->curwidth; i++) { 445 unsigned char cb = 0x80; 446 unsigned char cg = 0; 447 unsigned char cr = 0; 448 449 if (pmode == 1) { 450 if (frame->curline % 32 == 0) 451 cb = 0, cg = cr = 0xFF; 452 else if (i % 32 == 0) { 453 if (frame->curline % 32 == 1) 454 num_cell++; 455 cb = 0, cg = cr = 0xFF; 456 } else { 457 cb = 458 ((num_cell * 7) + 459 num_pass) & 0xFF; 460 cg = 461 ((num_cell * 5) + 462 num_pass * 2) & 0xFF; 463 cr = 464 ((num_cell * 3) + 465 num_pass * 3) & 0xFF; 466 } 467 } else { 468 /* Just the blue screen */ 469 } 470 471 *f++ = cb; 472 *f++ = cg; 473 *f++ = cr; 474 scan_length += 3; 475 } 476 } 477 478 frame->grabstate = FrameState_Done; 479 frame->scanlength += scan_length; 480 ++num_pass; 481 482} 483 484/* 485 * usbvision_decompress_alloc() 486 * 487 * allocates intermediate buffer for decompression 488 */ 489int usbvision_decompress_alloc(struct usb_usbvision *usbvision) 490{ 491 int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2; 492 usbvision->IntraFrameBuffer = vmalloc_32(IFB_size); 493 if (usbvision->IntraFrameBuffer == NULL) { 494 dev_err(&usbvision->dev->dev, 495 "%s: unable to allocate %d for compr. frame buffer\n", 496 __func__, IFB_size); 497 return -ENOMEM; 498 } 499 return 0; 500} 501 502/* 503 * usbvision_decompress_free() 504 * 505 * frees intermediate buffer for decompression 506 */ 507void usbvision_decompress_free(struct usb_usbvision *usbvision) 508{ 509 if (usbvision->IntraFrameBuffer != NULL) { 510 vfree(usbvision->IntraFrameBuffer); 511 usbvision->IntraFrameBuffer = NULL; 512 } 513} 514 515/************************************************************ 516 * Here comes the data parsing stuff that is run as interrupt 517 ************************************************************/ 518/* 519 * usbvision_find_header() 520 * 521 * Locate one of supported header markers in the scratch buffer. 522 */ 523static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision) 524{ 525 struct usbvision_frame *frame; 526 int foundHeader = 0; 527 528 frame = usbvision->curFrame; 529 530 while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) { 531 // found header in scratch 532 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u", 533 frame->isocHeader.magic_2, 534 frame->isocHeader.magic_1, 535 frame->isocHeader.headerLength, 536 frame->isocHeader.frameNum, 537 frame->isocHeader.framePhase, 538 frame->isocHeader.frameLatency, 539 frame->isocHeader.dataFormat, 540 frame->isocHeader.formatParam, 541 frame->isocHeader.frameWidth, 542 frame->isocHeader.frameHeight); 543 544 if (usbvision->requestIntra) { 545 if (frame->isocHeader.formatParam & 0x80) { 546 foundHeader = 1; 547 usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time 548 usbvision_unrequest_intra(usbvision); 549 break; 550 } 551 } 552 else { 553 foundHeader = 1; 554 break; 555 } 556 } 557 558 if (foundHeader) { 559 frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width; 560 frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height; 561 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3; 562 } 563 else { // no header found 564 PDEBUG(DBG_HEADER, "skipping scratch data, no header"); 565 scratch_reset(usbvision); 566 return ParseState_EndParse; 567 } 568 569 // found header 570 if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) { 571 //check isocHeader.frameNum for lost frames 572 if (usbvision->lastIsocFrameNum >= 0) { 573 if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) { 574 // unexpected frame drop: need to request new intra frame 575 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum); 576 usbvision_request_intra(usbvision); 577 return ParseState_NextFrame; 578 } 579 } 580 usbvision->lastIsocFrameNum = frame->isocHeader.frameNum; 581 } 582 usbvision->header_count++; 583 frame->scanstate = ScanState_Lines; 584 frame->curline = 0; 585 586 if (force_testpattern) { 587 usbvision_testpattern(usbvision, 1, 1); 588 return ParseState_NextFrame; 589 } 590 return ParseState_Continue; 591} 592 593static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision, 594 long *pcopylen) 595{ 596 volatile struct usbvision_frame *frame; 597 unsigned char *f; 598 int len; 599 int i; 600 unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components 601 unsigned char rv, gv, bv; // RGB components 602 int clipmask_index, bytes_per_pixel; 603 int stretch_bytes, clipmask_add; 604 605 frame = usbvision->curFrame; 606 f = frame->data + (frame->v4l2_linesize * frame->curline); 607 608 /* Make sure there's enough data for the entire line */ 609 len = (frame->isocHeader.frameWidth * 2)+5; 610 if (scratch_len(usbvision) < len) { 611 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len); 612 return ParseState_Out; 613 } 614 615 if ((frame->curline + 1) >= frame->frmheight) { 616 return ParseState_NextFrame; 617 } 618 619 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel; 620 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel; 621 clipmask_index = frame->curline * MAX_FRAME_WIDTH; 622 clipmask_add = usbvision->stretch_width; 623 624 for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) { 625 626 scratch_get(usbvision, &yuyv[0], 4); 627 628 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { 629 *f++ = yuyv[0]; // Y 630 *f++ = yuyv[3]; // U 631 } 632 else { 633 634 YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv); 635 switch (frame->v4l2_format.format) { 636 case V4L2_PIX_FMT_RGB565: 637 *f++ = (0x1F & rv) | 638 (0xE0 & (gv << 5)); 639 *f++ = (0x07 & (gv >> 3)) | 640 (0xF8 & bv); 641 break; 642 case V4L2_PIX_FMT_RGB24: 643 *f++ = rv; 644 *f++ = gv; 645 *f++ = bv; 646 break; 647 case V4L2_PIX_FMT_RGB32: 648 *f++ = rv; 649 *f++ = gv; 650 *f++ = bv; 651 f++; 652 break; 653 case V4L2_PIX_FMT_RGB555: 654 *f++ = (0x1F & rv) | 655 (0xE0 & (gv << 5)); 656 *f++ = (0x03 & (gv >> 3)) | 657 (0x7C & (bv << 2)); 658 break; 659 } 660 } 661 clipmask_index += clipmask_add; 662 f += stretch_bytes; 663 664 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { 665 *f++ = yuyv[2]; // Y 666 *f++ = yuyv[1]; // V 667 } 668 else { 669 670 YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv); 671 switch (frame->v4l2_format.format) { 672 case V4L2_PIX_FMT_RGB565: 673 *f++ = (0x1F & rv) | 674 (0xE0 & (gv << 5)); 675 *f++ = (0x07 & (gv >> 3)) | 676 (0xF8 & bv); 677 break; 678 case V4L2_PIX_FMT_RGB24: 679 *f++ = rv; 680 *f++ = gv; 681 *f++ = bv; 682 break; 683 case V4L2_PIX_FMT_RGB32: 684 *f++ = rv; 685 *f++ = gv; 686 *f++ = bv; 687 f++; 688 break; 689 case V4L2_PIX_FMT_RGB555: 690 *f++ = (0x1F & rv) | 691 (0xE0 & (gv << 5)); 692 *f++ = (0x03 & (gv >> 3)) | 693 (0x7C & (bv << 2)); 694 break; 695 } 696 } 697 clipmask_index += clipmask_add; 698 f += stretch_bytes; 699 } 700 701 frame->curline += usbvision->stretch_height; 702 *pcopylen += frame->v4l2_linesize * usbvision->stretch_height; 703 704 if (frame->curline >= frame->frmheight) { 705 return ParseState_NextFrame; 706 } 707 else { 708 return ParseState_Continue; 709 } 710} 711 712/* The decompression routine */ 713static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed, 714 unsigned char *Decompressed, int *StartPos, 715 int *BlockTypeStartPos, int Len) 716{ 717 int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen; 718 unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator; 719 720 Integrator = 0; 721 Pos = *StartPos; 722 BlockTypePos = *BlockTypeStartPos; 723 MaxPos = 396; //Pos + Len; 724 ExtraPos = Pos; 725 BlockLen = 0; 726 BlockByte = 0; 727 BlockCode = 0; 728 BlockType = 0; 729 BlockTypeByte = 0; 730 BlockTypeLen = 0; 731 RestPixel = Len; 732 733 for (Idx = 0; Idx < Len; Idx++) { 734 735 if (BlockLen == 0) { 736 if (BlockTypeLen==0) { 737 BlockTypeByte = Compressed[BlockTypePos]; 738 BlockTypePos++; 739 BlockTypeLen = 4; 740 } 741 BlockType = (BlockTypeByte & 0xC0) >> 6; 742 743 //statistic: 744 usbvision->ComprBlockTypes[BlockType]++; 745 746 Pos = ExtraPos; 747 if (BlockType == 0) { 748 if(RestPixel >= 24) { 749 Idx += 23; 750 RestPixel -= 24; 751 Integrator = Decompressed[Idx]; 752 } else { 753 Idx += RestPixel - 1; 754 RestPixel = 0; 755 } 756 } else { 757 BlockCode = Compressed[Pos]; 758 Pos++; 759 if (RestPixel >= 24) { 760 BlockLen = 24; 761 } else { 762 BlockLen = RestPixel; 763 } 764 RestPixel -= BlockLen; 765 ExtraPos = Pos + (BlockLen / 4); 766 } 767 BlockTypeByte <<= 2; 768 BlockTypeLen -= 1; 769 } 770 if (BlockLen > 0) { 771 if ((BlockLen%4) == 0) { 772 BlockByte = Compressed[Pos]; 773 Pos++; 774 } 775 if (BlockType == 1) { //inter Block 776 Integrator = Decompressed[Idx]; 777 } 778 switch (BlockByte & 0xC0) { 779 case 0x03<<6: 780 Integrator += Compressed[ExtraPos]; 781 ExtraPos++; 782 break; 783 case 0x02<<6: 784 Integrator += BlockCode; 785 break; 786 case 0x00: 787 Integrator -= BlockCode; 788 break; 789 } 790 Decompressed[Idx] = Integrator; 791 BlockByte <<= 2; 792 BlockLen -= 1; 793 } 794 } 795 *StartPos = ExtraPos; 796 *BlockTypeStartPos = BlockTypePos; 797 return Idx; 798} 799 800 801/* 802 * usbvision_parse_compress() 803 * 804 * Parse compressed frame from the scratch buffer, put 805 * decoded RGB value into the current frame buffer and add the written 806 * number of bytes (RGB) to the *pcopylen. 807 * 808 */ 809static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision, 810 long *pcopylen) 811{ 812#define USBVISION_STRIP_MAGIC 0x5A 813#define USBVISION_STRIP_LEN_MAX 400 814#define USBVISION_STRIP_HEADER_LEN 3 815 816 struct usbvision_frame *frame; 817 unsigned char *f,*u = NULL ,*v = NULL; 818 unsigned char StripData[USBVISION_STRIP_LEN_MAX]; 819 unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN]; 820 int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos; 821 int clipmask_index, bytes_per_pixel, rc; 822 int imageSize; 823 unsigned char rv, gv, bv; 824 static unsigned char *Y, *U, *V; 825 826 frame = usbvision->curFrame; 827 imageSize = frame->frmwidth * frame->frmheight; 828 if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) || 829 (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) { // this is a planar format 830 //... v4l2_linesize not used here. 831 f = frame->data + (frame->width * frame->curline); 832 } else 833 f = frame->data + (frame->v4l2_linesize * frame->curline); 834 835 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers 836 // get base of u and b planes add halfoffset 837 838 u = frame->data 839 + imageSize 840 + (frame->frmwidth >>1) * frame->curline ; 841 v = u + (imageSize >>1 ); 842 843 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){ 844 845 v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ; 846 u = v + (imageSize >>2) ; 847 } 848 849 if (frame->curline == 0) { 850 usbvision_adjust_compression(usbvision); 851 } 852 853 if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) { 854 return ParseState_Out; 855 } 856 857 //get strip header without changing the scratch_read_ptr 858 scratch_set_extra_ptr(usbvision, &StripPtr, 0); 859 scratch_get_extra(usbvision, &StripHeader[0], &StripPtr, 860 USBVISION_STRIP_HEADER_LEN); 861 862 if (StripHeader[0] != USBVISION_STRIP_MAGIC) { 863 // wrong strip magic 864 usbvision->stripMagicErrors++; 865 return ParseState_NextFrame; 866 } 867 868 if (frame->curline != (int)StripHeader[2]) { 869 //line number missmatch error 870 usbvision->stripLineNumberErrors++; 871 } 872 873 StripLen = 2 * (unsigned int)StripHeader[1]; 874 if (StripLen > USBVISION_STRIP_LEN_MAX) { 875 // strip overrun 876 // I think this never happens 877 usbvision_request_intra(usbvision); 878 } 879 880 if (scratch_len(usbvision) < StripLen) { 881 //there is not enough data for the strip 882 return ParseState_Out; 883 } 884 885 if (usbvision->IntraFrameBuffer) { 886 Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline; 887 U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2); 888 V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2); 889 } 890 else { 891 return ParseState_NextFrame; 892 } 893 894 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel; 895 clipmask_index = frame->curline * MAX_FRAME_WIDTH; 896 897 scratch_get(usbvision, StripData, StripLen); 898 899 IdxEnd = frame->frmwidth; 900 BlockTypePos = USBVISION_STRIP_HEADER_LEN; 901 StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2; 902 BlockPos = StartBlockPos; 903 904 usbvision->BlockPos = BlockPos; 905 906 if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) { 907 //return ParseState_Continue; 908 } 909 if (StripLen > usbvision->maxStripLen) { 910 usbvision->maxStripLen = StripLen; 911 } 912 913 if (frame->curline%2) { 914 if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) { 915 //return ParseState_Continue; 916 } 917 } 918 else { 919 if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) { 920 //return ParseState_Continue; 921 } 922 } 923 924 if (BlockPos > usbvision->comprBlockPos) { 925 usbvision->comprBlockPos = BlockPos; 926 } 927 if (BlockPos > StripLen) { 928 usbvision->stripLenErrors++; 929 } 930 931 for (Idx = 0; Idx < IdxEnd; Idx++) { 932 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { 933 *f++ = Y[Idx]; 934 *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2]; 935 } 936 else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) { 937 *f++ = Y[Idx]; 938 if ( Idx & 0x01) 939 *u++ = U[Idx>>1] ; 940 else 941 *v++ = V[Idx>>1]; 942 } 943 else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) { 944 *f++ = Y [Idx]; 945 if ( !(( Idx & 0x01 ) | ( frame->curline & 0x01 )) ){ 946 947/* only need do this for 1 in 4 pixels */ 948/* intraframe buffer is YUV420 format */ 949 950 *u++ = U[Idx >>1]; 951 *v++ = V[Idx >>1]; 952 } 953 954 } 955 else { 956 YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv); 957 switch (frame->v4l2_format.format) { 958 case V4L2_PIX_FMT_GREY: 959 *f++ = Y[Idx]; 960 break; 961 case V4L2_PIX_FMT_RGB555: 962 *f++ = (0x1F & rv) | 963 (0xE0 & (gv << 5)); 964 *f++ = (0x03 & (gv >> 3)) | 965 (0x7C & (bv << 2)); 966 break; 967 case V4L2_PIX_FMT_RGB565: 968 *f++ = (0x1F & rv) | 969 (0xE0 & (gv << 5)); 970 *f++ = (0x07 & (gv >> 3)) | 971 (0xF8 & bv); 972 break; 973 case V4L2_PIX_FMT_RGB24: 974 *f++ = rv; 975 *f++ = gv; 976 *f++ = bv; 977 break; 978 case V4L2_PIX_FMT_RGB32: 979 *f++ = rv; 980 *f++ = gv; 981 *f++ = bv; 982 f++; 983 break; 984 } 985 } 986 clipmask_index++; 987 } 988 /* Deal with non-integer no. of bytes for YUV420P */ 989 if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 ) 990 *pcopylen += frame->v4l2_linesize; 991 else 992 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1; 993 994 frame->curline += 1; 995 996 if (frame->curline >= frame->frmheight) { 997 return ParseState_NextFrame; 998 } 999 else { 1000 return ParseState_Continue; 1001 } 1002 1003} 1004 1005 1006/* 1007 * usbvision_parse_lines_420() 1008 * 1009 * Parse two lines from the scratch buffer, put 1010 * decoded RGB value into the current frame buffer and add the written 1011 * number of bytes (RGB) to the *pcopylen. 1012 * 1013 */ 1014static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision, 1015 long *pcopylen) 1016{ 1017 struct usbvision_frame *frame; 1018 unsigned char *f_even = NULL, *f_odd = NULL; 1019 unsigned int pixel_per_line, block; 1020 int pixel, block_split; 1021 int y_ptr, u_ptr, v_ptr, y_odd_offset; 1022 const int y_block_size = 128; 1023 const int uv_block_size = 64; 1024 const int sub_block_size = 32; 1025 const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4; 1026 const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4; 1027 unsigned char y[2], u, v; /* YUV components */ 1028 int y_, u_, v_, vb, uvg, ur; 1029 int r_, g_, b_; /* RGB components */ 1030 unsigned char g; 1031 int clipmask_even_index, clipmask_odd_index, bytes_per_pixel; 1032 int clipmask_add, stretch_bytes; 1033 1034 frame = usbvision->curFrame; 1035 f_even = frame->data + (frame->v4l2_linesize * frame->curline); 1036 f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height; 1037 1038 /* Make sure there's enough data for the entire line */ 1039 /* In this mode usbvision transfer 3 bytes for every 2 pixels */ 1040 /* I need two lines to decode the color */ 1041 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel; 1042 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel; 1043 clipmask_even_index = frame->curline * MAX_FRAME_WIDTH; 1044 clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH; 1045 clipmask_add = usbvision->stretch_width; 1046 pixel_per_line = frame->isocHeader.frameWidth; 1047 1048 if (scratch_len(usbvision) < (int)pixel_per_line * 3) { 1049 //printk(KERN_DEBUG "out of data, need %d\n", len); 1050 return ParseState_Out; 1051 } 1052 1053 if ((frame->curline + 1) >= frame->frmheight) { 1054 return ParseState_NextFrame; 1055 } 1056 1057 block_split = (pixel_per_line%y_block_size) ? 1 : 0; //are some blocks splitted into different lines? 1058 1059 y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size) 1060 + block_split * uv_block_size; 1061 1062 scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset); 1063 scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size); 1064 scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset 1065 + (4 - block_split) * sub_block_size); 1066 1067 for (block = 0; block < (pixel_per_line / sub_block_size); 1068 block++) { 1069 1070 1071 for (pixel = 0; pixel < sub_block_size; pixel +=2) { 1072 scratch_get(usbvision, &y[0], 2); 1073 scratch_get_extra(usbvision, &u, &u_ptr, 1); 1074 scratch_get_extra(usbvision, &v, &v_ptr, 1); 1075 1076 //I don't use the YUV_TO_RGB macro for better performance 1077 v_ = v - 128; 1078 u_ = u - 128; 1079 vb = 132252 * v_; 1080 uvg= -53281 * u_ - 25625 * v_; 1081 ur = 104595 * u_; 1082 1083 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { 1084 *f_even++ = y[0]; 1085 *f_even++ = v; 1086 } 1087 else { 1088 y_ = 76284 * (y[0] - 16); 1089 1090 b_ = (y_ + vb) >> 16; 1091 g_ = (y_ + uvg)>> 16; 1092 r_ = (y_ + ur) >> 16; 1093 1094 switch (frame->v4l2_format.format) { 1095 case V4L2_PIX_FMT_RGB565: 1096 g = LIMIT_RGB(g_); 1097 *f_even++ = 1098 (0x1F & LIMIT_RGB(r_)) | 1099 (0xE0 & (g << 5)); 1100 *f_even++ = 1101 (0x07 & (g >> 3)) | 1102 (0xF8 & LIMIT_RGB(b_)); 1103 break; 1104 case V4L2_PIX_FMT_RGB24: 1105 *f_even++ = LIMIT_RGB(r_); 1106 *f_even++ = LIMIT_RGB(g_); 1107 *f_even++ = LIMIT_RGB(b_); 1108 break; 1109 case V4L2_PIX_FMT_RGB32: 1110 *f_even++ = LIMIT_RGB(r_); 1111 *f_even++ = LIMIT_RGB(g_); 1112 *f_even++ = LIMIT_RGB(b_); 1113 f_even++; 1114 break; 1115 case V4L2_PIX_FMT_RGB555: 1116 g = LIMIT_RGB(g_); 1117 *f_even++ = (0x1F & LIMIT_RGB(r_)) | 1118 (0xE0 & (g << 5)); 1119 *f_even++ = (0x03 & (g >> 3)) | 1120 (0x7C & (LIMIT_RGB(b_) << 2)); 1121 break; 1122 } 1123 } 1124 clipmask_even_index += clipmask_add; 1125 f_even += stretch_bytes; 1126 1127 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { 1128 *f_even++ = y[1]; 1129 *f_even++ = u; 1130 } 1131 else { 1132 y_ = 76284 * (y[1] - 16); 1133 1134 b_ = (y_ + vb) >> 16; 1135 g_ = (y_ + uvg)>> 16; 1136 r_ = (y_ + ur) >> 16; 1137 1138 switch (frame->v4l2_format.format) { 1139 case V4L2_PIX_FMT_RGB565: 1140 g = LIMIT_RGB(g_); 1141 *f_even++ = 1142 (0x1F & LIMIT_RGB(r_)) | 1143 (0xE0 & (g << 5)); 1144 *f_even++ = 1145 (0x07 & (g >> 3)) | 1146 (0xF8 & LIMIT_RGB(b_)); 1147 break; 1148 case V4L2_PIX_FMT_RGB24: 1149 *f_even++ = LIMIT_RGB(r_); 1150 *f_even++ = LIMIT_RGB(g_); 1151 *f_even++ = LIMIT_RGB(b_); 1152 break; 1153 case V4L2_PIX_FMT_RGB32: 1154 *f_even++ = LIMIT_RGB(r_); 1155 *f_even++ = LIMIT_RGB(g_); 1156 *f_even++ = LIMIT_RGB(b_); 1157 f_even++; 1158 break; 1159 case V4L2_PIX_FMT_RGB555: 1160 g = LIMIT_RGB(g_); 1161 *f_even++ = (0x1F & LIMIT_RGB(r_)) | 1162 (0xE0 & (g << 5)); 1163 *f_even++ = (0x03 & (g >> 3)) | 1164 (0x7C & (LIMIT_RGB(b_) << 2)); 1165 break; 1166 } 1167 } 1168 clipmask_even_index += clipmask_add; 1169 f_even += stretch_bytes; 1170 1171 scratch_get_extra(usbvision, &y[0], &y_ptr, 2); 1172 1173 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { 1174 *f_odd++ = y[0]; 1175 *f_odd++ = v; 1176 } 1177 else { 1178 y_ = 76284 * (y[0] - 16); 1179 1180 b_ = (y_ + vb) >> 16; 1181 g_ = (y_ + uvg)>> 16; 1182 r_ = (y_ + ur) >> 16; 1183 1184 switch (frame->v4l2_format.format) { 1185 case V4L2_PIX_FMT_RGB565: 1186 g = LIMIT_RGB(g_); 1187 *f_odd++ = 1188 (0x1F & LIMIT_RGB(r_)) | 1189 (0xE0 & (g << 5)); 1190 *f_odd++ = 1191 (0x07 & (g >> 3)) | 1192 (0xF8 & LIMIT_RGB(b_)); 1193 break; 1194 case V4L2_PIX_FMT_RGB24: 1195 *f_odd++ = LIMIT_RGB(r_); 1196 *f_odd++ = LIMIT_RGB(g_); 1197 *f_odd++ = LIMIT_RGB(b_); 1198 break; 1199 case V4L2_PIX_FMT_RGB32: 1200 *f_odd++ = LIMIT_RGB(r_); 1201 *f_odd++ = LIMIT_RGB(g_); 1202 *f_odd++ = LIMIT_RGB(b_); 1203 f_odd++; 1204 break; 1205 case V4L2_PIX_FMT_RGB555: 1206 g = LIMIT_RGB(g_); 1207 *f_odd++ = (0x1F & LIMIT_RGB(r_)) | 1208 (0xE0 & (g << 5)); 1209 *f_odd++ = (0x03 & (g >> 3)) | 1210 (0x7C & (LIMIT_RGB(b_) << 2)); 1211 break; 1212 } 1213 } 1214 clipmask_odd_index += clipmask_add; 1215 f_odd += stretch_bytes; 1216 1217 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { 1218 *f_odd++ = y[1]; 1219 *f_odd++ = u; 1220 } 1221 else { 1222 y_ = 76284 * (y[1] - 16); 1223 1224 b_ = (y_ + vb) >> 16; 1225 g_ = (y_ + uvg)>> 16; 1226 r_ = (y_ + ur) >> 16; 1227 1228 switch (frame->v4l2_format.format) { 1229 case V4L2_PIX_FMT_RGB565: 1230 g = LIMIT_RGB(g_); 1231 *f_odd++ = 1232 (0x1F & LIMIT_RGB(r_)) | 1233 (0xE0 & (g << 5)); 1234 *f_odd++ = 1235 (0x07 & (g >> 3)) | 1236 (0xF8 & LIMIT_RGB(b_)); 1237 break; 1238 case V4L2_PIX_FMT_RGB24: 1239 *f_odd++ = LIMIT_RGB(r_); 1240 *f_odd++ = LIMIT_RGB(g_); 1241 *f_odd++ = LIMIT_RGB(b_); 1242 break; 1243 case V4L2_PIX_FMT_RGB32: 1244 *f_odd++ = LIMIT_RGB(r_); 1245 *f_odd++ = LIMIT_RGB(g_); 1246 *f_odd++ = LIMIT_RGB(b_); 1247 f_odd++; 1248 break; 1249 case V4L2_PIX_FMT_RGB555: 1250 g = LIMIT_RGB(g_); 1251 *f_odd++ = (0x1F & LIMIT_RGB(r_)) | 1252 (0xE0 & (g << 5)); 1253 *f_odd++ = (0x03 & (g >> 3)) | 1254 (0x7C & (LIMIT_RGB(b_) << 2)); 1255 break; 1256 } 1257 } 1258 clipmask_odd_index += clipmask_add; 1259 f_odd += stretch_bytes; 1260 } 1261 1262 scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size); 1263 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size] 1264 * sub_block_size); 1265 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size] 1266 * sub_block_size); 1267 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size] 1268 * sub_block_size); 1269 } 1270 1271 scratch_rm_old(usbvision, pixel_per_line * 3 / 2 1272 + block_split * sub_block_size); 1273 1274 frame->curline += 2 * usbvision->stretch_height; 1275 *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height; 1276 1277 if (frame->curline >= frame->frmheight) 1278 return ParseState_NextFrame; 1279 else 1280 return ParseState_Continue; 1281} 1282 1283/* 1284 * usbvision_parse_data() 1285 * 1286 * Generic routine to parse the scratch buffer. It employs either 1287 * usbvision_find_header() or usbvision_parse_lines() to do most 1288 * of work. 1289 * 1290 */ 1291static void usbvision_parse_data(struct usb_usbvision *usbvision) 1292{ 1293 struct usbvision_frame *frame; 1294 enum ParseState newstate; 1295 long copylen = 0; 1296 unsigned long lock_flags; 1297 1298 frame = usbvision->curFrame; 1299 1300 PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision)); 1301 1302 while (1) { 1303 1304 newstate = ParseState_Out; 1305 if (scratch_len(usbvision)) { 1306 if (frame->scanstate == ScanState_Scanning) { 1307 newstate = usbvision_find_header(usbvision); 1308 } 1309 else if (frame->scanstate == ScanState_Lines) { 1310 if (usbvision->isocMode == ISOC_MODE_YUV420) { 1311 newstate = usbvision_parse_lines_420(usbvision, ©len); 1312 } 1313 else if (usbvision->isocMode == ISOC_MODE_YUV422) { 1314 newstate = usbvision_parse_lines_422(usbvision, ©len); 1315 } 1316 else if (usbvision->isocMode == ISOC_MODE_COMPRESS) { 1317 newstate = usbvision_parse_compress(usbvision, ©len); 1318 } 1319 1320 } 1321 } 1322 if (newstate == ParseState_Continue) { 1323 continue; 1324 } 1325 else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) { 1326 break; 1327 } 1328 else { 1329 return; /* ParseState_EndParse */ 1330 } 1331 } 1332 1333 if (newstate == ParseState_NextFrame) { 1334 frame->grabstate = FrameState_Done; 1335 do_gettimeofday(&(frame->timestamp)); 1336 frame->sequence = usbvision->frame_num; 1337 1338 spin_lock_irqsave(&usbvision->queue_lock, lock_flags); 1339 list_move_tail(&(frame->frame), &usbvision->outqueue); 1340 usbvision->curFrame = NULL; 1341 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags); 1342 1343 usbvision->frame_num++; 1344 1345 /* This will cause the process to request another frame. */ 1346 if (waitqueue_active(&usbvision->wait_frame)) { 1347 PDEBUG(DBG_PARSE, "Wake up !"); 1348 wake_up_interruptible(&usbvision->wait_frame); 1349 } 1350 } 1351 else 1352 frame->grabstate = FrameState_Grabbing; 1353 1354 1355 /* Update the frame's uncompressed length. */ 1356 frame->scanlength += copylen; 1357} 1358 1359 1360/* 1361 * Make all of the blocks of data contiguous 1362 */ 1363static int usbvision_compress_isochronous(struct usb_usbvision *usbvision, 1364 struct urb *urb) 1365{ 1366 unsigned char *packet_data; 1367 int i, totlen = 0; 1368 1369 for (i = 0; i < urb->number_of_packets; i++) { 1370 int packet_len = urb->iso_frame_desc[i].actual_length; 1371 int packet_stat = urb->iso_frame_desc[i].status; 1372 1373 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset; 1374 1375 /* Detect and ignore errored packets */ 1376 if (packet_stat) { // packet_stat != 0 ????????????? 1377 PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat); 1378 usbvision->isocErrCount++; 1379 continue; 1380 } 1381 1382 /* Detect and ignore empty packets */ 1383 if (packet_len < 0) { 1384 PDEBUG(DBG_ISOC, "error packet [%d]", i); 1385 usbvision->isocSkipCount++; 1386 continue; 1387 } 1388 else if (packet_len == 0) { /* Frame end ????? */ 1389 PDEBUG(DBG_ISOC, "null packet [%d]", i); 1390 usbvision->isocstate=IsocState_NoFrame; 1391 usbvision->isocSkipCount++; 1392 continue; 1393 } 1394 else if (packet_len > usbvision->isocPacketSize) { 1395 PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i); 1396 usbvision->isocSkipCount++; 1397 continue; 1398 } 1399 1400 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len); 1401 1402 if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins 1403 usbvision->isocstate=IsocState_InFrame; 1404 scratch_mark_header(usbvision); 1405 usbvision_measure_bandwidth(usbvision); 1406 PDEBUG(DBG_ISOC, "packet with header"); 1407 } 1408 1409 /* 1410 * If usbvision continues to feed us with data but there is no 1411 * consumption (if, for example, V4L client fell asleep) we 1412 * may overflow the buffer. We have to move old data over to 1413 * free room for new data. This is bad for old data. If we 1414 * just drop new data then it's bad for new data... choose 1415 * your favorite evil here. 1416 */ 1417 if (scratch_free(usbvision) < packet_len) { 1418 1419 usbvision->scratch_ovf_count++; 1420 PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d", 1421 scratch_len(usbvision), packet_len); 1422 scratch_rm_old(usbvision, packet_len - scratch_free(usbvision)); 1423 } 1424 1425 /* Now we know that there is enough room in scratch buffer */ 1426 scratch_put(usbvision, packet_data, packet_len); 1427 totlen += packet_len; 1428 usbvision->isocDataCount += packet_len; 1429 usbvision->isocPacketCount++; 1430 } 1431#if ENABLE_HEXDUMP 1432 if (totlen > 0) { 1433 static int foo; 1434 if (foo < 1) { 1435 printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen); 1436 usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen); 1437 ++foo; 1438 } 1439 } 1440#endif 1441 return totlen; 1442} 1443 1444static void usbvision_isocIrq(struct urb *urb) 1445{ 1446 int errCode = 0; 1447 int len; 1448 struct usb_usbvision *usbvision = urb->context; 1449 int i; 1450 unsigned long startTime = jiffies; 1451 struct usbvision_frame **f; 1452 1453 /* We don't want to do anything if we are about to be removed! */ 1454 if (!USBVISION_IS_OPERATIONAL(usbvision)) 1455 return; 1456 1457 /* any urb with wrong status is ignored without acknowledgement */ 1458 if (urb->status == -ENOENT) { 1459 return; 1460 } 1461 1462 f = &usbvision->curFrame; 1463 1464 /* Manage streaming interruption */ 1465 if (usbvision->streaming == Stream_Interrupt) { 1466 usbvision->streaming = Stream_Idle; 1467 if ((*f)) { 1468 (*f)->grabstate = FrameState_Ready; 1469 (*f)->scanstate = ScanState_Scanning; 1470 } 1471 PDEBUG(DBG_IRQ, "stream interrupted"); 1472 wake_up_interruptible(&usbvision->wait_stream); 1473 } 1474 1475 /* Copy the data received into our scratch buffer */ 1476 len = usbvision_compress_isochronous(usbvision, urb); 1477 1478 usbvision->isocUrbCount++; 1479 usbvision->urb_length = len; 1480 1481 if (usbvision->streaming == Stream_On) { 1482 1483 /* If we collected enough data let's parse! */ 1484 if ((scratch_len(usbvision) > USBVISION_HEADER_LENGTH) && 1485 (!list_empty(&(usbvision->inqueue))) ) { 1486 if (!(*f)) { 1487 (*f) = list_entry(usbvision->inqueue.next, 1488 struct usbvision_frame, 1489 frame); 1490 } 1491 usbvision_parse_data(usbvision); 1492 } 1493 else { 1494 /*If we don't have a frame 1495 we're current working on, complain */ 1496 PDEBUG(DBG_IRQ, 1497 "received data, but no one needs it"); 1498 scratch_reset(usbvision); 1499 } 1500 } 1501 else { 1502 PDEBUG(DBG_IRQ, "received data, but no one needs it"); 1503 scratch_reset(usbvision); 1504 } 1505 1506 usbvision->timeInIrq += jiffies - startTime; 1507 1508 for (i = 0; i < USBVISION_URB_FRAMES; i++) { 1509 urb->iso_frame_desc[i].status = 0; 1510 urb->iso_frame_desc[i].actual_length = 0; 1511 } 1512 1513 urb->status = 0; 1514 urb->dev = usbvision->dev; 1515 errCode = usb_submit_urb (urb, GFP_ATOMIC); 1516 1517 if(errCode) { 1518 dev_err(&usbvision->dev->dev, 1519 "%s: usb_submit_urb failed: error %d\n", 1520 __func__, errCode); 1521 } 1522 1523 return; 1524} 1525 1526/*************************************/ 1527/* Low level usbvision access functions */ 1528/*************************************/ 1529 1530/* 1531 * usbvision_read_reg() 1532 * 1533 * return < 0 -> Error 1534 * >= 0 -> Data 1535 */ 1536 1537int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg) 1538{ 1539 int errCode = 0; 1540 unsigned char buffer[1]; 1541 1542 if (!USBVISION_IS_OPERATIONAL(usbvision)) 1543 return -1; 1544 1545 errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1), 1546 USBVISION_OP_CODE, 1547 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 1548 0, (__u16) reg, buffer, 1, HZ); 1549 1550 if (errCode < 0) { 1551 dev_err(&usbvision->dev->dev, 1552 "%s: failed: error %d\n", __func__, errCode); 1553 return errCode; 1554 } 1555 return buffer[0]; 1556} 1557 1558/* 1559 * usbvision_write_reg() 1560 * 1561 * return 1 -> Reg written 1562 * 0 -> usbvision is not yet ready 1563 * -1 -> Something went wrong 1564 */ 1565 1566int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg, 1567 unsigned char value) 1568{ 1569 int errCode = 0; 1570 1571 if (!USBVISION_IS_OPERATIONAL(usbvision)) 1572 return 0; 1573 1574 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), 1575 USBVISION_OP_CODE, 1576 USB_DIR_OUT | USB_TYPE_VENDOR | 1577 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ); 1578 1579 if (errCode < 0) { 1580 dev_err(&usbvision->dev->dev, 1581 "%s: failed: error %d\n", __func__, errCode); 1582 } 1583 return errCode; 1584} 1585 1586 1587static void usbvision_ctrlUrb_complete(struct urb *urb) 1588{ 1589 struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context; 1590 1591 PDEBUG(DBG_IRQ, ""); 1592 usbvision->ctrlUrbBusy = 0; 1593 if (waitqueue_active(&usbvision->ctrlUrb_wq)) { 1594 wake_up_interruptible(&usbvision->ctrlUrb_wq); 1595 } 1596} 1597 1598 1599static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address, 1600 unsigned char *data, int len) 1601{ 1602 int errCode = 0; 1603 1604 PDEBUG(DBG_IRQ, ""); 1605 if (len > 8) { 1606 return -EFAULT; 1607 } 1608 if (usbvision->ctrlUrbBusy) { 1609 return -EBUSY; 1610 } 1611 usbvision->ctrlUrbBusy = 1; 1612 1613 usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT; 1614 usbvision->ctrlUrbSetup.bRequest = USBVISION_OP_CODE; 1615 usbvision->ctrlUrbSetup.wValue = 0; 1616 usbvision->ctrlUrbSetup.wIndex = cpu_to_le16(address); 1617 usbvision->ctrlUrbSetup.wLength = cpu_to_le16(len); 1618 usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev, 1619 usb_sndctrlpipe(usbvision->dev, 1), 1620 (unsigned char *)&usbvision->ctrlUrbSetup, 1621 (void *)usbvision->ctrlUrbBuffer, len, 1622 usbvision_ctrlUrb_complete, 1623 (void *)usbvision); 1624 1625 memcpy(usbvision->ctrlUrbBuffer, data, len); 1626 1627 errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC); 1628 if (errCode < 0) { 1629 // error in usb_submit_urb() 1630 usbvision->ctrlUrbBusy = 0; 1631 } 1632 PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode); 1633 return errCode; 1634} 1635 1636 1637static int usbvision_init_compression(struct usb_usbvision *usbvision) 1638{ 1639 int errCode = 0; 1640 1641 usbvision->lastIsocFrameNum = -1; 1642 usbvision->isocDataCount = 0; 1643 usbvision->isocPacketCount = 0; 1644 usbvision->isocSkipCount = 0; 1645 usbvision->comprLevel = 50; 1646 usbvision->lastComprLevel = -1; 1647 usbvision->isocUrbCount = 0; 1648 usbvision->requestIntra = 1; 1649 usbvision->isocMeasureBandwidthCount = 0; 1650 1651 return errCode; 1652} 1653 1654/* this function measures the used bandwidth since last call 1655 * return: 0 : no error 1656 * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize 1657 */ 1658static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision) 1659{ 1660 int errCode = 0; 1661 1662 if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames 1663 usbvision->isocMeasureBandwidthCount++; 1664 return errCode; 1665 } 1666 if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) { 1667 usbvision->usedBandwidth = usbvision->isocDataCount / 1668 (usbvision->isocPacketCount + usbvision->isocSkipCount) * 1669 100 / usbvision->isocPacketSize; 1670 } 1671 usbvision->isocMeasureBandwidthCount = 0; 1672 usbvision->isocDataCount = 0; 1673 usbvision->isocPacketCount = 0; 1674 usbvision->isocSkipCount = 0; 1675 return errCode; 1676} 1677 1678static int usbvision_adjust_compression (struct usb_usbvision *usbvision) 1679{ 1680 int errCode = 0; 1681 unsigned char buffer[6]; 1682 1683 PDEBUG(DBG_IRQ, ""); 1684 if ((adjustCompression) && (usbvision->usedBandwidth > 0)) { 1685 usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2; 1686 RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100); 1687 if (usbvision->comprLevel != usbvision->lastComprLevel) { 1688 int distorsion; 1689 if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) { 1690 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM Threshold 1 1691 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM Threshold 2 1692 distorsion = 7 + 248 * usbvision->comprLevel / 100; 1693 buffer[2] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (inter) 1694 buffer[3] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (intra) 1695 distorsion = 1 + 42 * usbvision->comprLevel / 100; 1696 buffer[4] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (inter) 1697 buffer[5] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (intra) 1698 } 1699 else { //BRIDGE_NT1003 1700 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM threshold 1 1701 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM threshold 2 1702 distorsion = 2 + 253 * usbvision->comprLevel / 100; 1703 buffer[2] = (unsigned char)(distorsion & 0xFF); // distorsion threshold bit0-7 1704 buffer[3] = 0; //(unsigned char)((distorsion >> 8) & 0x0F); // distorsion threshold bit 8-11 1705 distorsion = 0 + 43 * usbvision->comprLevel / 100; 1706 buffer[4] = (unsigned char)(distorsion & 0xFF); // maximum distorsion bit0-7 1707 buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01); // maximum distorsion bit 8 1708 } 1709 errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6); 1710 if (errCode == 0){ 1711 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0], 1712 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]); 1713 usbvision->lastComprLevel = usbvision->comprLevel; 1714 } 1715 } 1716 } 1717 return errCode; 1718} 1719 1720static int usbvision_request_intra (struct usb_usbvision *usbvision) 1721{ 1722 int errCode = 0; 1723 unsigned char buffer[1]; 1724 1725 PDEBUG(DBG_IRQ, ""); 1726 usbvision->requestIntra = 1; 1727 buffer[0] = 1; 1728 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1); 1729 return errCode; 1730} 1731 1732static int usbvision_unrequest_intra (struct usb_usbvision *usbvision) 1733{ 1734 int errCode = 0; 1735 unsigned char buffer[1]; 1736 1737 PDEBUG(DBG_IRQ, ""); 1738 usbvision->requestIntra = 0; 1739 buffer[0] = 0; 1740 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1); 1741 return errCode; 1742} 1743 1744/******************************* 1745 * usbvision utility functions 1746 *******************************/ 1747 1748int usbvision_power_off(struct usb_usbvision *usbvision) 1749{ 1750 int errCode = 0; 1751 1752 PDEBUG(DBG_FUNC, ""); 1753 1754 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN); 1755 if (errCode == 1) { 1756 usbvision->power = 0; 1757 } 1758 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode); 1759 return errCode; 1760} 1761 1762/* 1763 * usbvision_set_video_format() 1764 * 1765 */ 1766static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format) 1767{ 1768 static const char proc[] = "usbvision_set_video_format"; 1769 int rc; 1770 unsigned char value[2]; 1771 1772 if (!USBVISION_IS_OPERATIONAL(usbvision)) 1773 return 0; 1774 1775 PDEBUG(DBG_FUNC, "isocMode %#02x", format); 1776 1777 if ((format != ISOC_MODE_YUV422) 1778 && (format != ISOC_MODE_YUV420) 1779 && (format != ISOC_MODE_COMPRESS)) { 1780 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420", 1781 format); 1782 format = ISOC_MODE_YUV420; 1783 } 1784 value[0] = 0x0A; //TODO: See the effect of the filter 1785 value[1] = format; // Sets the VO_MODE register which follows FILT_CONT 1786 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), 1787 USBVISION_OP_CODE, 1788 USB_DIR_OUT | USB_TYPE_VENDOR | 1789 USB_RECIP_ENDPOINT, 0, 1790 (__u16) USBVISION_FILT_CONT, value, 2, HZ); 1791 1792 if (rc < 0) { 1793 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - " 1794 "reconnect or reload driver.\n", proc, rc); 1795 } 1796 usbvision->isocMode = format; 1797 return rc; 1798} 1799 1800/* 1801 * usbvision_set_output() 1802 * 1803 */ 1804 1805int usbvision_set_output(struct usb_usbvision *usbvision, int width, 1806 int height) 1807{ 1808 int errCode = 0; 1809 int UsbWidth, UsbHeight; 1810 unsigned int frameRate=0, frameDrop=0; 1811 unsigned char value[4]; 1812 1813 if (!USBVISION_IS_OPERATIONAL(usbvision)) { 1814 return 0; 1815 } 1816 1817 if (width > MAX_USB_WIDTH) { 1818 UsbWidth = width / 2; 1819 usbvision->stretch_width = 2; 1820 } 1821 else { 1822 UsbWidth = width; 1823 usbvision->stretch_width = 1; 1824 } 1825 1826 if (height > MAX_USB_HEIGHT) { 1827 UsbHeight = height / 2; 1828 usbvision->stretch_height = 2; 1829 } 1830 else { 1831 UsbHeight = height; 1832 usbvision->stretch_height = 1; 1833 } 1834 1835 RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH); 1836 UsbWidth &= ~(MIN_FRAME_WIDTH-1); 1837 RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT); 1838 UsbHeight &= ~(1); 1839 1840 PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d", 1841 UsbWidth, UsbHeight, width, height, 1842 usbvision->stretch_width, usbvision->stretch_height); 1843 1844 /* I'll not rewrite the same values */ 1845 if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) { 1846 value[0] = UsbWidth & 0xff; //LSB 1847 value[1] = (UsbWidth >> 8) & 0x03; //MSB 1848 value[2] = UsbHeight & 0xff; //LSB 1849 value[3] = (UsbHeight >> 8) & 0x03; //MSB 1850 1851 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), 1852 USBVISION_OP_CODE, 1853 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 1854 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ); 1855 1856 if (errCode < 0) { 1857 dev_err(&usbvision->dev->dev, 1858 "%s failed: error %d\n", __func__, errCode); 1859 return errCode; 1860 } 1861 usbvision->curwidth = usbvision->stretch_width * UsbWidth; 1862 usbvision->curheight = usbvision->stretch_height * UsbHeight; 1863 } 1864 1865 if (usbvision->isocMode == ISOC_MODE_YUV422) { 1866 frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2); 1867 } 1868 else if (usbvision->isocMode == ISOC_MODE_YUV420) { 1869 frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8); 1870 } 1871 else { 1872 frameRate = FRAMERATE_MAX; 1873 } 1874 1875 if (usbvision->tvnormId & V4L2_STD_625_50) { 1876 frameDrop = frameRate * 32 / 25 - 1; 1877 } 1878 else if (usbvision->tvnormId & V4L2_STD_525_60) { 1879 frameDrop = frameRate * 32 / 30 - 1; 1880 } 1881 1882 RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX); 1883 1884 PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop); 1885 1886 frameDrop = FRAMERATE_MAX; // We can allow the maximum here, because dropping is controlled 1887 1888 /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ... 1889 => frameSkip = 4; 1890 => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25; 1891 1892 frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ... 1893 => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ... 1894 => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125; 1895 */ 1896 errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop); 1897 return errCode; 1898} 1899 1900 1901/* 1902 * usbvision_frames_alloc 1903 * allocate the required frames 1904 */ 1905int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames) 1906{ 1907 int i; 1908 1909 /*needs to be page aligned cause the buffers can be mapped individually! */ 1910 usbvision->max_frame_size = PAGE_ALIGN(usbvision->curwidth * 1911 usbvision->curheight * 1912 usbvision->palette.bytes_per_pixel); 1913 1914 /* Try to do my best to allocate the frames the user want in the remaining memory */ 1915 usbvision->num_frames = number_of_frames; 1916 while (usbvision->num_frames > 0) { 1917 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size; 1918 if((usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size))) { 1919 break; 1920 } 1921 usbvision->num_frames--; 1922 } 1923 1924 spin_lock_init(&usbvision->queue_lock); 1925 init_waitqueue_head(&usbvision->wait_frame); 1926 init_waitqueue_head(&usbvision->wait_stream); 1927 1928 /* Allocate all buffers */ 1929 for (i = 0; i < usbvision->num_frames; i++) { 1930 usbvision->frame[i].index = i; 1931 usbvision->frame[i].grabstate = FrameState_Unused; 1932 usbvision->frame[i].data = usbvision->fbuf + 1933 i * usbvision->max_frame_size; 1934 /* 1935 * Set default sizes for read operation. 1936 */ 1937 usbvision->stretch_width = 1; 1938 usbvision->stretch_height = 1; 1939 usbvision->frame[i].width = usbvision->curwidth; 1940 usbvision->frame[i].height = usbvision->curheight; 1941 usbvision->frame[i].bytes_read = 0; 1942 } 1943 PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",usbvision->num_frames,usbvision->max_frame_size); 1944 return usbvision->num_frames; 1945} 1946 1947/* 1948 * usbvision_frames_free 1949 * frees memory allocated for the frames 1950 */ 1951void usbvision_frames_free(struct usb_usbvision *usbvision) 1952{ 1953 /* Have to free all that memory */ 1954 PDEBUG(DBG_FUNC, "free %d frames",usbvision->num_frames); 1955 1956 if (usbvision->fbuf != NULL) { 1957 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size); 1958 usbvision->fbuf = NULL; 1959 1960 usbvision->num_frames = 0; 1961 } 1962} 1963/* 1964 * usbvision_empty_framequeues() 1965 * prepare queues for incoming and outgoing frames 1966 */ 1967void usbvision_empty_framequeues(struct usb_usbvision *usbvision) 1968{ 1969 u32 i; 1970 1971 INIT_LIST_HEAD(&(usbvision->inqueue)); 1972 INIT_LIST_HEAD(&(usbvision->outqueue)); 1973 1974 for (i = 0; i < USBVISION_NUMFRAMES; i++) { 1975 usbvision->frame[i].grabstate = FrameState_Unused; 1976 usbvision->frame[i].bytes_read = 0; 1977 } 1978} 1979 1980/* 1981 * usbvision_stream_interrupt() 1982 * stops streaming 1983 */ 1984int usbvision_stream_interrupt(struct usb_usbvision *usbvision) 1985{ 1986 int ret = 0; 1987 1988 /* stop reading from the device */ 1989 1990 usbvision->streaming = Stream_Interrupt; 1991 ret = wait_event_timeout(usbvision->wait_stream, 1992 (usbvision->streaming == Stream_Idle), 1993 msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES)); 1994 return ret; 1995} 1996 1997/* 1998 * usbvision_set_compress_params() 1999 * 2000 */ 2001 2002static int usbvision_set_compress_params(struct usb_usbvision *usbvision) 2003{ 2004 static const char proc[] = "usbvision_set_compresion_params: "; 2005 int rc; 2006 unsigned char value[6]; 2007 2008 value[0] = 0x0F; // Intra-Compression cycle 2009 value[1] = 0x01; // Reg.45 one line per strip 2010 value[2] = 0x00; // Reg.46 Force intra mode on all new frames 2011 value[3] = 0x00; // Reg.47 FORCE_UP <- 0 normal operation (not force) 2012 value[4] = 0xA2; // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode. 2013 value[5] = 0x00; // Reg.49 DVI_YUV This has nothing to do with compression 2014 2015 //catched values for NT1004 2016 // value[0] = 0xFF; // Never apply intra mode automatically 2017 // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip 2018 // value[2] = 0x01; // Force intra mode on all new frames 2019 // value[3] = 0x00; // Strip size 400 Bytes; do not force up 2020 // value[4] = 0xA2; // 2021 if (!USBVISION_IS_OPERATIONAL(usbvision)) 2022 return 0; 2023 2024 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), 2025 USBVISION_OP_CODE, 2026 USB_DIR_OUT | USB_TYPE_VENDOR | 2027 USB_RECIP_ENDPOINT, 0, 2028 (__u16) USBVISION_INTRA_CYC, value, 5, HZ); 2029 2030 if (rc < 0) { 2031 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " 2032 "reconnect or reload driver.\n", proc, rc); 2033 return rc; 2034 } 2035 2036 if (usbvision->bridgeType == BRIDGE_NT1004) { 2037 value[0] = 20; // PCM Threshold 1 2038 value[1] = 12; // PCM Threshold 2 2039 value[2] = 255; // Distorsion Threshold inter 2040 value[3] = 255; // Distorsion Threshold intra 2041 value[4] = 43; // Max Distorsion inter 2042 value[5] = 43; // Max Distorsion intra 2043 } 2044 else { 2045 value[0] = 20; // PCM Threshold 1 2046 value[1] = 12; // PCM Threshold 2 2047 value[2] = 255; // Distorsion Threshold d7-d0 2048 value[3] = 0; // Distorsion Threshold d11-d8 2049 value[4] = 43; // Max Distorsion d7-d0 2050 value[5] = 0; // Max Distorsion d8 2051 } 2052 2053 if (!USBVISION_IS_OPERATIONAL(usbvision)) 2054 return 0; 2055 2056 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), 2057 USBVISION_OP_CODE, 2058 USB_DIR_OUT | USB_TYPE_VENDOR | 2059 USB_RECIP_ENDPOINT, 0, 2060 (__u16) USBVISION_PCM_THR1, value, 6, HZ); 2061 2062 if (rc < 0) { 2063 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " 2064 "reconnect or reload driver.\n", proc, rc); 2065 return rc; 2066 } 2067 2068 2069 return rc; 2070} 2071 2072 2073/* 2074 * usbvision_set_input() 2075 * 2076 * Set the input (saa711x, ...) size x y and other misc input params 2077 * I've no idea if this parameters are right 2078 * 2079 */ 2080int usbvision_set_input(struct usb_usbvision *usbvision) 2081{ 2082 static const char proc[] = "usbvision_set_input: "; 2083 int rc; 2084 unsigned char value[8]; 2085 unsigned char dvi_yuv_value; 2086 2087 if (!USBVISION_IS_OPERATIONAL(usbvision)) 2088 return 0; 2089 2090 /* Set input format expected from decoder*/ 2091 if (usbvision_device_data[usbvision->DevModel].Vin_Reg1_override) { 2092 value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1; 2093 } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) { 2094 /* SAA7113 uses 8 bit output */ 2095 value[0] = USBVISION_8_422_SYNC; 2096 } else { 2097 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses 2098 * as that is how saa7111 is configured */ 2099 value[0] = USBVISION_16_422_SYNC; 2100 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/ 2101 } 2102 2103 rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]); 2104 if (rc < 0) { 2105 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " 2106 "reconnect or reload driver.\n", proc, rc); 2107 return rc; 2108 } 2109 2110 2111 if (usbvision->tvnormId & V4L2_STD_PAL) { 2112 value[0] = 0xC0; 2113 value[1] = 0x02; //0x02C0 -> 704 Input video line length 2114 value[2] = 0x20; 2115 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines 2116 value[4] = 0x60; 2117 value[5] = 0x00; //0x0060 -> 96 Input video h offset 2118 value[6] = 0x16; 2119 value[7] = 0x00; //0x0016 -> 22 Input video v offset 2120 } else if (usbvision->tvnormId & V4L2_STD_SECAM) { 2121 value[0] = 0xC0; 2122 value[1] = 0x02; //0x02C0 -> 704 Input video line length 2123 value[2] = 0x20; 2124 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines 2125 value[4] = 0x01; 2126 value[5] = 0x00; //0x0001 -> 01 Input video h offset 2127 value[6] = 0x01; 2128 value[7] = 0x00; //0x0001 -> 01 Input video v offset 2129 } else { /* V4L2_STD_NTSC */ 2130 value[0] = 0xD0; 2131 value[1] = 0x02; //0x02D0 -> 720 Input video line length 2132 value[2] = 0xF0; 2133 value[3] = 0x00; //0x00F0 -> 240 Input video number of lines 2134 value[4] = 0x50; 2135 value[5] = 0x00; //0x0050 -> 80 Input video h offset 2136 value[6] = 0x10; 2137 value[7] = 0x00; //0x0010 -> 16 Input video v offset 2138 } 2139 2140 if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) { 2141 value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff; 2142 value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8; 2143 } 2144 2145 if (adjust_X_Offset != -1) { 2146 value[4] = adjust_X_Offset & 0xff; 2147 value[5] = (adjust_X_Offset & 0x0300) >> 8; 2148 } 2149 2150 if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) { 2151 value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff; 2152 value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8; 2153 } 2154 2155 if (adjust_Y_Offset != -1) { 2156 value[6] = adjust_Y_Offset & 0xff; 2157 value[7] = (adjust_Y_Offset & 0x0300) >> 8; 2158 } 2159 2160 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), 2161 USBVISION_OP_CODE, /* USBVISION specific code */ 2162 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0, 2163 (__u16) USBVISION_LXSIZE_I, value, 8, HZ); 2164 if (rc < 0) { 2165 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " 2166 "reconnect or reload driver.\n", proc, rc); 2167 return rc; 2168 } 2169 2170 2171 dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */ 2172 2173 if(usbvision_device_data[usbvision->DevModel].Dvi_yuv_override){ 2174 dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv; 2175 } 2176 else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) { 2177 /* This changes as the fine sync control changes. Further investigation necessary */ 2178 dvi_yuv_value = 0x06; 2179 } 2180 2181 return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value)); 2182} 2183 2184 2185/* 2186 * usbvision_set_dram_settings() 2187 * 2188 * Set the buffer address needed by the usbvision dram to operate 2189 * This values has been taken with usbsnoop. 2190 * 2191 */ 2192 2193static int usbvision_set_dram_settings(struct usb_usbvision *usbvision) 2194{ 2195 int rc; 2196 unsigned char value[8]; 2197 2198 if (usbvision->isocMode == ISOC_MODE_COMPRESS) { 2199 value[0] = 0x42; 2200 value[1] = 0x71; 2201 value[2] = 0xff; 2202 value[3] = 0x00; 2203 value[4] = 0x98; 2204 value[5] = 0xe0; 2205 value[6] = 0x71; 2206 value[7] = 0xff; 2207 // UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte) 2208 // FDL: 0x00000-0x0E099 = 57498 Words 2209 // VDW: 0x0E3FF-0x3FFFF 2210 } 2211 else { 2212 value[0] = 0x42; 2213 value[1] = 0x00; 2214 value[2] = 0xff; 2215 value[3] = 0x00; 2216 value[4] = 0x00; 2217 value[5] = 0x00; 2218 value[6] = 0x00; 2219 value[7] = 0xff; 2220 } 2221 /* These are the values of the address of the video buffer, 2222 * they have to be loaded into the USBVISION_DRM_PRM1-8 2223 * 2224 * Start address of video output buffer for read: drm_prm1-2 -> 0x00000 2225 * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff 2226 * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000 2227 * Only used in compressed mode 2228 * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff 2229 * Only used in compressed mode 2230 * Start address of video output buffer for write: drm_prm1-7 -> 0x00000 2231 * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff 2232 */ 2233 2234 if (!USBVISION_IS_OPERATIONAL(usbvision)) 2235 return 0; 2236 2237 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), 2238 USBVISION_OP_CODE, /* USBVISION specific code */ 2239 USB_DIR_OUT | USB_TYPE_VENDOR | 2240 USB_RECIP_ENDPOINT, 0, 2241 (__u16) USBVISION_DRM_PRM1, value, 8, HZ); 2242 2243 if (rc < 0) { 2244 dev_err(&usbvision->dev->dev, "%sERROR=%d\n", __func__, rc); 2245 return rc; 2246 } 2247 2248 /* Restart the video buffer logic */ 2249 if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR | 2250 USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0) 2251 return rc; 2252 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00); 2253 2254 return rc; 2255} 2256 2257/* 2258 * () 2259 * 2260 * Power on the device, enables suspend-resume logic 2261 * & reset the isoc End-Point 2262 * 2263 */ 2264 2265int usbvision_power_on(struct usb_usbvision *usbvision) 2266{ 2267 int errCode = 0; 2268 2269 PDEBUG(DBG_FUNC, ""); 2270 2271 usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN); 2272 usbvision_write_reg(usbvision, USBVISION_PWR_REG, 2273 USBVISION_SSPND_EN | USBVISION_RES2); 2274 2275 usbvision_write_reg(usbvision, USBVISION_PWR_REG, 2276 USBVISION_SSPND_EN | USBVISION_PWR_VID); 2277 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, 2278 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2); 2279 if (errCode == 1) { 2280 usbvision->power = 1; 2281 } 2282 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode); 2283 return errCode; 2284} 2285 2286 2287/* 2288 * usbvision timer stuff 2289 */ 2290 2291// to call usbvision_power_off from task queue 2292static void call_usbvision_power_off(struct work_struct *work) 2293{ 2294 struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork); 2295 2296 PDEBUG(DBG_FUNC, ""); 2297 if(mutex_lock_interruptible(&usbvision->lock)) { 2298 return; 2299 } 2300 2301 2302 if(usbvision->user == 0) { 2303 usbvision_i2c_unregister(usbvision); 2304 2305 usbvision_power_off(usbvision); 2306 usbvision->initialized = 0; 2307 } 2308 mutex_unlock(&usbvision->lock); 2309} 2310 2311static void usbvision_powerOffTimer(unsigned long data) 2312{ 2313 struct usb_usbvision *usbvision = (void *) data; 2314 2315 PDEBUG(DBG_FUNC, ""); 2316 del_timer(&usbvision->powerOffTimer); 2317 INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off); 2318 (void) schedule_work(&usbvision->powerOffWork); 2319} 2320 2321void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision) 2322{ 2323 init_timer(&usbvision->powerOffTimer); 2324 usbvision->powerOffTimer.data = (long) usbvision; 2325 usbvision->powerOffTimer.function = usbvision_powerOffTimer; 2326} 2327 2328void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision) 2329{ 2330 mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME); 2331} 2332 2333void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision) 2334{ 2335 if (timer_pending(&usbvision->powerOffTimer)) { 2336 del_timer(&usbvision->powerOffTimer); 2337 } 2338} 2339 2340/* 2341 * usbvision_begin_streaming() 2342 * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no 2343 * idea about the rest 2344 */ 2345int usbvision_begin_streaming(struct usb_usbvision *usbvision) 2346{ 2347 int errCode = 0; 2348 2349 if (usbvision->isocMode == ISOC_MODE_COMPRESS) { 2350 usbvision_init_compression(usbvision); 2351 } 2352 errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID | 2353 usbvision->Vin_Reg2_Preset); 2354 return errCode; 2355} 2356 2357/* 2358 * usbvision_restart_isoc() 2359 * Not sure yet if touching here PWR_REG make loose the config 2360 */ 2361 2362int usbvision_restart_isoc(struct usb_usbvision *usbvision) 2363{ 2364 int ret; 2365 2366 if ( 2367 (ret = 2368 usbvision_write_reg(usbvision, USBVISION_PWR_REG, 2369 USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0) 2370 return ret; 2371 if ( 2372 (ret = 2373 usbvision_write_reg(usbvision, USBVISION_PWR_REG, 2374 USBVISION_SSPND_EN | USBVISION_PWR_VID | 2375 USBVISION_RES2)) < 0) 2376 return ret; 2377 if ( 2378 (ret = 2379 usbvision_write_reg(usbvision, USBVISION_VIN_REG2, 2380 USBVISION_KEEP_BLANK | USBVISION_NOHVALID | 2381 usbvision->Vin_Reg2_Preset)) < 0) return ret; 2382 2383 /* TODO: schedule timeout */ 2384 while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1); 2385 2386 return 0; 2387} 2388 2389int usbvision_audio_off(struct usb_usbvision *usbvision) 2390{ 2391 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) { 2392 printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n"); 2393 return -1; 2394 } 2395 usbvision->AudioMute = 0; 2396 usbvision->AudioChannel = USBVISION_AUDIO_MUTE; 2397 return 0; 2398} 2399 2400int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel) 2401{ 2402 if (!usbvision->AudioMute) { 2403 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) { 2404 printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n"); 2405 return -1; 2406 } 2407 } 2408 usbvision->AudioChannel = AudioChannel; 2409 return 0; 2410} 2411 2412int usbvision_setup(struct usb_usbvision *usbvision,int format) 2413{ 2414 usbvision_set_video_format(usbvision, format); 2415 usbvision_set_dram_settings(usbvision); 2416 usbvision_set_compress_params(usbvision); 2417 usbvision_set_input(usbvision); 2418 usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT); 2419 usbvision_restart_isoc(usbvision); 2420 2421 /* cosas del PCM */ 2422 return USBVISION_IS_OPERATIONAL(usbvision); 2423} 2424 2425int usbvision_set_alternate(struct usb_usbvision *dev) 2426{ 2427 int errCode, prev_alt = dev->ifaceAlt; 2428 int i; 2429 2430 dev->ifaceAlt=0; 2431 for(i=0;i< dev->num_alt; i++) 2432 if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->ifaceAlt]) 2433 dev->ifaceAlt=i; 2434 2435 if (dev->ifaceAlt != prev_alt) { 2436 dev->isocPacketSize = dev->alt_max_pkt_size[dev->ifaceAlt]; 2437 PDEBUG(DBG_FUNC,"setting alternate %d with wMaxPacketSize=%u", dev->ifaceAlt,dev->isocPacketSize); 2438 errCode = usb_set_interface(dev->dev, dev->iface, dev->ifaceAlt); 2439 if (errCode < 0) { 2440 dev_err(&dev->dev->dev, 2441 "cannot change alternate number to %d (error=%i)\n", 2442 dev->ifaceAlt, errCode); 2443 return errCode; 2444 } 2445 } 2446 2447 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isocPacketSize); 2448 2449 return 0; 2450} 2451 2452/* 2453 * usbvision_init_isoc() 2454 * 2455 */ 2456int usbvision_init_isoc(struct usb_usbvision *usbvision) 2457{ 2458 struct usb_device *dev = usbvision->dev; 2459 int bufIdx, errCode, regValue; 2460 int sb_size; 2461 2462 if (!USBVISION_IS_OPERATIONAL(usbvision)) 2463 return -EFAULT; 2464 2465 usbvision->curFrame = NULL; 2466 scratch_reset(usbvision); 2467 2468 /* Alternate interface 1 is is the biggest frame size */ 2469 errCode = usbvision_set_alternate(usbvision); 2470 if (errCode < 0) { 2471 usbvision->last_error = errCode; 2472 return -EBUSY; 2473 } 2474 sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize; 2475 2476 regValue = (16 - usbvision_read_reg(usbvision, 2477 USBVISION_ALTER_REG)) & 0x0F; 2478 2479 usbvision->usb_bandwidth = regValue >> 1; 2480 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", 2481 usbvision->usb_bandwidth); 2482 2483 2484 2485 /* We double buffer the Iso lists */ 2486 2487 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) { 2488 int j, k; 2489 struct urb *urb; 2490 2491 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL); 2492 if (urb == NULL) { 2493 dev_err(&usbvision->dev->dev, 2494 "%s: usb_alloc_urb() failed\n", __func__); 2495 return -ENOMEM; 2496 } 2497 usbvision->sbuf[bufIdx].urb = urb; 2498 usbvision->sbuf[bufIdx].data = 2499 usb_buffer_alloc(usbvision->dev, 2500 sb_size, 2501 GFP_KERNEL, 2502 &urb->transfer_dma); 2503 urb->dev = dev; 2504 urb->context = usbvision; 2505 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp); 2506 urb->transfer_flags = URB_ISO_ASAP; 2507 urb->interval = 1; 2508 urb->transfer_buffer = usbvision->sbuf[bufIdx].data; 2509 urb->complete = usbvision_isocIrq; 2510 urb->number_of_packets = USBVISION_URB_FRAMES; 2511 urb->transfer_buffer_length = 2512 usbvision->isocPacketSize * USBVISION_URB_FRAMES; 2513 for (j = k = 0; j < USBVISION_URB_FRAMES; j++, 2514 k += usbvision->isocPacketSize) { 2515 urb->iso_frame_desc[j].offset = k; 2516 urb->iso_frame_desc[j].length = 2517 usbvision->isocPacketSize; 2518 } 2519 } 2520 2521 /* Submit all URBs */ 2522 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) { 2523 errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb, 2524 GFP_KERNEL); 2525 if (errCode) { 2526 dev_err(&usbvision->dev->dev, 2527 "%s: usb_submit_urb(%d) failed: error %d\n", 2528 __func__, bufIdx, errCode); 2529 } 2530 } 2531 2532 usbvision->streaming = Stream_Idle; 2533 PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x", 2534 __func__, 2535 usbvision->video_endp); 2536 return 0; 2537} 2538 2539/* 2540 * usbvision_stop_isoc() 2541 * 2542 * This procedure stops streaming and deallocates URBs. Then it 2543 * activates zero-bandwidth alt. setting of the video interface. 2544 * 2545 */ 2546void usbvision_stop_isoc(struct usb_usbvision *usbvision) 2547{ 2548 int bufIdx, errCode, regValue; 2549 int sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize; 2550 2551 if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL)) 2552 return; 2553 2554 /* Unschedule all of the iso td's */ 2555 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) { 2556 usb_kill_urb(usbvision->sbuf[bufIdx].urb); 2557 if (usbvision->sbuf[bufIdx].data){ 2558 usb_buffer_free(usbvision->dev, 2559 sb_size, 2560 usbvision->sbuf[bufIdx].data, 2561 usbvision->sbuf[bufIdx].urb->transfer_dma); 2562 } 2563 usb_free_urb(usbvision->sbuf[bufIdx].urb); 2564 usbvision->sbuf[bufIdx].urb = NULL; 2565 } 2566 2567 PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __func__); 2568 usbvision->streaming = Stream_Off; 2569 2570 if (!usbvision->remove_pending) { 2571 2572 /* Set packet size to 0 */ 2573 usbvision->ifaceAlt=0; 2574 errCode = usb_set_interface(usbvision->dev, usbvision->iface, 2575 usbvision->ifaceAlt); 2576 if (errCode < 0) { 2577 dev_err(&usbvision->dev->dev, 2578 "%s: usb_set_interface() failed: error %d\n", 2579 __func__, errCode); 2580 usbvision->last_error = errCode; 2581 } 2582 regValue = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F; 2583 usbvision->isocPacketSize = 2584 (regValue == 0) ? 0 : (regValue * 64) - 1; 2585 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", 2586 usbvision->isocPacketSize); 2587 2588 usbvision->usb_bandwidth = regValue >> 1; 2589 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", 2590 usbvision->usb_bandwidth); 2591 } 2592} 2593 2594int usbvision_muxsel(struct usb_usbvision *usbvision, int channel) 2595{ 2596 /* inputs #0 and #3 are constant for every SAA711x. */ 2597 /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */ 2598 int mode[4]= {SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3}; 2599 int audio[]= {1, 0, 0, 0}; 2600 struct v4l2_routing route; 2601 //channel 0 is TV with audiochannel 1 (tuner mono) 2602 //channel 1 is Composite with audio channel 0 (line in) 2603 //channel 2 is S-Video with audio channel 0 (line in) 2604 //channel 3 is additional video inputs to the device with audio channel 0 (line in) 2605 2606 RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs); 2607 usbvision->ctl_input = channel; 2608 2609 // set the new channel 2610 // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video 2611 // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red 2612 2613 switch (usbvision_device_data[usbvision->DevModel].Codec) { 2614 case CODEC_SAA7113: 2615 mode[1] = SAA7115_COMPOSITE2; 2616 if (SwitchSVideoInput) { 2617 /* To handle problems with S-Video Input for 2618 * some devices. Use SwitchSVideoInput 2619 * parameter when loading the module.*/ 2620 mode[2] = SAA7115_COMPOSITE1; 2621 } 2622 else { 2623 mode[2] = SAA7115_SVIDEO1; 2624 } 2625 break; 2626 case CODEC_SAA7111: 2627 default: 2628 /* modes for saa7111 */ 2629 mode[1] = SAA7115_COMPOSITE1; 2630 mode[2] = SAA7115_SVIDEO1; 2631 break; 2632 } 2633 route.input = mode[channel]; 2634 route.output = 0; 2635 call_all(usbvision, video, s_routing, &route); 2636 usbvision_set_audio(usbvision, audio[channel]); 2637 return 0; 2638} 2639 2640/* 2641 * Overrides for Emacs so that we follow Linus's tabbing style. 2642 * --------------------------------------------------------------------------- 2643 * Local variables: 2644 * c-basic-offset: 8 2645 * End: 2646 */ 2647