git.oblomov.eu Git - linux-2.6/blob - drivers/media/video/usbvision/usbvision-core.c

   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/sched.h>
  28 #include <linux/list.h>
  29 #include <linux/timer.h>
  30 #include <linux/slab.h>
  31 #include <linux/mm.h>
  32 #include <linux/utsname.h>
  33 #include <linux/highmem.h>
  34 #include <linux/smp_lock.h>
  35 #include <linux/videodev.h>
  36 #include <linux/vmalloc.h>
  37 #include <linux/module.h>
  38 #include <linux/init.h>
  39 #include <linux/spinlock.h>
  40 #include <asm/io.h>
  41 #include <linux/videodev2.h>
  42 #include <linux/video_decoder.h>
  43 #include <linux/i2c.h>
  44
  45 #include <media/saa7115.h>
  46 #include <media/v4l2-common.h>
  47 #include <media/tuner.h>
  48 #include <media/audiochip.h>
  49
  50 #include <linux/moduleparam.h>
  51 #include <linux/workqueue.h>
  52
  53 #ifdef CONFIG_KMOD
  54 #include <linux/kmod.h>
  55 #endif
  56
  57 #include "usbvision.h"
  58
  59 static unsigned int core_debug = 0;
  60 module_param(core_debug,int,0644);
  61 MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
  62
  63 static unsigned int force_testpattern = 0;
  64 module_param(force_testpattern,int,0644);
  65 MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]");
  66
  67 static int adjustCompression = 1;                       // Set the compression to be adaptive
  68 module_param(adjustCompression, int, 0444);
  69 MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device.  Default: 1 (On)");
  70
  71 static int SwitchSVideoInput = 0;                       // To help people with Black and White output with using s-video input.  Some cables and input device are wired differently.
  72 module_param(SwitchSVideoInput, int, 0444);
  73 MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input.  Some cables and input device are wired differently. Default: 0 (Off)");
  74
  75 #define ENABLE_HEXDUMP  0       /* Enable if you need it */
  76
  77
  78 #ifdef USBVISION_DEBUG
  79         #define PDEBUG(level, fmt, args...) \
  80                 if (core_debug & (level)) info("[%s:%d] " fmt, __PRETTY_FUNCTION__, __LINE__ , ## args)
  81 #else
  82         #define PDEBUG(level, fmt, args...) do {} while(0)
  83 #endif
  84
  85 #define DBG_HEADER      1<<0
  86 #define DBG_IRQ         1<<1
  87 #define DBG_ISOC        1<<2
  88 #define DBG_PARSE       1<<3
  89 #define DBG_SCRATCH     1<<4
  90 #define DBG_FUNC        1<<5
  91
  92 static const int max_imgwidth = MAX_FRAME_WIDTH;
  93 static const int max_imgheight = MAX_FRAME_HEIGHT;
  94 static const int min_imgwidth = MIN_FRAME_WIDTH;
  95 static const int min_imgheight = MIN_FRAME_HEIGHT;
  96
  97 /* The value of 'scratch_buf_size' affects quality of the picture
  98  * in many ways. Shorter buffers may cause loss of data when client
  99  * is too slow. Larger buffers are memory-consuming and take longer
 100  * to work with. This setting can be adjusted, but the default value
 101  * should be OK for most desktop users.
 102  */
 103 #define DEFAULT_SCRATCH_BUF_SIZE        (0x20000)               // 128kB memory scratch buffer
 104 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
 105
 106 // Function prototypes
 107 static int usbvision_request_intra (struct usb_usbvision *usbvision);
 108 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision);
 109 static int usbvision_adjust_compression (struct usb_usbvision *usbvision);
 110 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision);
 111
 112 /*******************************/
 113 /* Memory management functions */
 114 /*******************************/
 115
 116 /*
 117  * Here we want the physical address of the memory.
 118  * This is used when initializing the contents of the area.
 119  */
 120
 121 static void *usbvision_rvmalloc(unsigned long size)
 122 {
 123         void *mem;
 124         unsigned long adr;
 125
 126         size = PAGE_ALIGN(size);
 127         mem = vmalloc_32(size);
 128         if (!mem)
 129                 return NULL;
 130
 131         memset(mem, 0, size); /* Clear the ram out, no junk to the user */
 132         adr = (unsigned long) mem;
 133         while (size > 0) {
 134                 SetPageReserved(vmalloc_to_page((void *)adr));
 135                 adr += PAGE_SIZE;
 136                 size -= PAGE_SIZE;
 137         }
 138
 139         return mem;
 140 }
 141
 142 void usbvision_rvfree(void *mem, unsigned long size)
 143 {
 144         unsigned long adr;
 145
 146         if (!mem)
 147                 return;
 148
 149         size = PAGE_ALIGN(size);
 150
 151         adr = (unsigned long) mem;
 152         while ((long) size > 0) {
 153                 ClearPageReserved(vmalloc_to_page((void *)adr));
 154                 adr += PAGE_SIZE;
 155                 size -= PAGE_SIZE;
 156         }
 157
 158         vfree(mem);
 159 }
 160
 161
 162
 163 #if ENABLE_HEXDUMP
 164 static void usbvision_hexdump(const unsigned char *data, int len)
 165 {
 166         char tmp[80];
 167         int i, k;
 168
 169         for (i = k = 0; len > 0; i++, len--) {
 170                 if (i > 0 && (i % 16 == 0)) {
 171                         printk("%s\n", tmp);
 172                         k = 0;
 173                 }
 174                 k += sprintf(&tmp[k], "%02x ", data[i]);
 175         }
 176         if (k > 0)
 177                 printk("%s\n", tmp);
 178 }
 179 #endif
 180
 181 /********************************
 182  * scratch ring buffer handling
 183  ********************************/
 184 static int scratch_len(struct usb_usbvision *usbvision)    /*This returns the amount of data actually in the buffer */
 185 {
 186         int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
 187         if (len < 0) {
 188                 len += scratch_buf_size;
 189         }
 190         PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
 191
 192         return len;
 193 }
 194
 195
 196 /* This returns the free space left in the buffer */
 197 static int scratch_free(struct usb_usbvision *usbvision)
 198 {
 199         int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
 200         if (free <= 0) {
 201                 free += scratch_buf_size;
 202         }
 203         if (free) {
 204                 free -= 1;                                                      /* at least one byte in the buffer must */
 205                                                                                 /* left blank, otherwise there is no chance to differ between full and empty */
 206         }
 207         PDEBUG(DBG_SCRATCH, "return %d\n", free);
 208
 209         return free;
 210 }
 211
 212
 213 /* This puts data into the buffer */
 214 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
 215                        int len)
 216 {
 217         int len_part;
 218
 219         if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
 220                 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
 221                 usbvision->scratch_write_ptr += len;
 222         }
 223         else {
 224                 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
 225                 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
 226                 if (len == len_part) {
 227                         usbvision->scratch_write_ptr = 0;                       /* just set write_ptr to zero */
 228                 }
 229                 else {
 230                         memcpy(usbvision->scratch, data + len_part, len - len_part);
 231                         usbvision->scratch_write_ptr = len - len_part;
 232                 }
 233         }
 234
 235         PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
 236
 237         return len;
 238 }
 239
 240 /* This marks the write_ptr as position of new frame header */
 241 static void scratch_mark_header(struct usb_usbvision *usbvision)
 242 {
 243         PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
 244
 245         usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
 246                                 usbvision->scratch_write_ptr;
 247         usbvision->scratch_headermarker_write_ptr += 1;
 248         usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
 249 }
 250
 251 /* This gets data from the buffer at the given "ptr" position */
 252 static int scratch_get_extra(struct usb_usbvision *usbvision,
 253                              unsigned char *data, int *ptr, int len)
 254 {
 255         int len_part;
 256         if (*ptr + len < scratch_buf_size) {
 257                 memcpy(data, usbvision->scratch + *ptr, len);
 258                 *ptr += len;
 259         }
 260         else {
 261                 len_part = scratch_buf_size - *ptr;
 262                 memcpy(data, usbvision->scratch + *ptr, len_part);
 263                 if (len == len_part) {
 264                         *ptr = 0;                                                       /* just set the y_ptr to zero */
 265                 }
 266                 else {
 267                         memcpy(data + len_part, usbvision->scratch, len - len_part);
 268                         *ptr = len - len_part;
 269                 }
 270         }
 271
 272         PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
 273
 274         return len;
 275 }
 276
 277
 278 /* This sets the scratch extra read pointer */
 279 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
 280                                   int len)
 281 {
 282         *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size;
 283
 284         PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
 285 }
 286
 287
 288 /*This increments the scratch extra read pointer */
 289 static void scratch_inc_extra_ptr(int *ptr, int len)
 290 {
 291         *ptr = (*ptr + len) % scratch_buf_size;
 292
 293         PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
 294 }
 295
 296
 297 /* This gets data from the buffer */
 298 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
 299                        int len)
 300 {
 301         int len_part;
 302         if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
 303                 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
 304                 usbvision->scratch_read_ptr += len;
 305         }
 306         else {
 307                 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
 308                 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
 309                 if (len == len_part) {
 310                         usbvision->scratch_read_ptr = 0;                                /* just set the read_ptr to zero */
 311                 }
 312                 else {
 313                         memcpy(data + len_part, usbvision->scratch, len - len_part);
 314                         usbvision->scratch_read_ptr = len - len_part;
 315                 }
 316         }
 317
 318         PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
 319
 320         return len;
 321 }
 322
 323
 324 /* This sets read pointer to next header and returns it */
 325 static int scratch_get_header(struct usb_usbvision *usbvision,
 326                               struct usbvision_frame_header *header)
 327 {
 328         int errCode = 0;
 329
 330         PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
 331
 332         while (usbvision->scratch_headermarker_write_ptr -
 333                 usbvision->scratch_headermarker_read_ptr != 0) {
 334                 usbvision->scratch_read_ptr =
 335                         usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
 336                 usbvision->scratch_headermarker_read_ptr += 1;
 337                 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
 338                 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
 339                 if ((header->magic_1 == USBVISION_MAGIC_1)
 340                          && (header->magic_2 == USBVISION_MAGIC_2)
 341                          && (header->headerLength == USBVISION_HEADER_LENGTH)) {
 342                         errCode = USBVISION_HEADER_LENGTH;
 343                         header->frameWidth  = header->frameWidthLo  + (header->frameWidthHi << 8);
 344                         header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8);
 345                         break;
 346                 }
 347         }
 348
 349         return errCode;
 350 }
 351
 352
 353 /*This removes len bytes of old data from the buffer */
 354 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
 355 {
 356
 357         usbvision->scratch_read_ptr += len;
 358         usbvision->scratch_read_ptr %= scratch_buf_size;
 359         PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
 360 }
 361
 362
 363 /*This resets the buffer - kills all data in it too */
 364 static void scratch_reset(struct usb_usbvision *usbvision)
 365 {
 366         PDEBUG(DBG_SCRATCH, "\n");
 367
 368         usbvision->scratch_read_ptr = 0;
 369         usbvision->scratch_write_ptr = 0;
 370         usbvision->scratch_headermarker_read_ptr = 0;
 371         usbvision->scratch_headermarker_write_ptr = 0;
 372         usbvision->isocstate = IsocState_NoFrame;
 373 }
 374
 375 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
 376 {
 377         usbvision->scratch = vmalloc_32(scratch_buf_size);
 378         scratch_reset(usbvision);
 379         if(usbvision->scratch == NULL) {
 380                 err("%s: unable to allocate %d bytes for scratch",
 381                     __FUNCTION__, scratch_buf_size);
 382                 return -ENOMEM;
 383         }
 384         return 0;
 385 }
 386
 387 void usbvision_scratch_free(struct usb_usbvision *usbvision)
 388 {
 389         if (usbvision->scratch != NULL) {
 390                 vfree(usbvision->scratch);
 391                 usbvision->scratch = NULL;
 392         }
 393 }
 394
 395 /*
 396  * usbvision_testpattern()
 397  *
 398  * Procedure forms a test pattern (yellow grid on blue background).
 399  *
 400  * Parameters:
 401  * fullframe:   if TRUE then entire frame is filled, otherwise the procedure
 402  *              continues from the current scanline.
 403  * pmode        0: fill the frame with solid blue color (like on VCR or TV)
 404  *              1: Draw a colored grid
 405  *
 406  */
 407 static void usbvision_testpattern(struct usb_usbvision *usbvision,
 408                                   int fullframe, int pmode)
 409 {
 410         static const char proc[] = "usbvision_testpattern";
 411         struct usbvision_frame *frame;
 412         unsigned char *f;
 413         int num_cell = 0;
 414         int scan_length = 0;
 415         static int num_pass = 0;
 416
 417         if (usbvision == NULL) {
 418                 printk(KERN_ERR "%s: usbvision == NULL\n", proc);
 419                 return;
 420         }
 421         if (usbvision->curFrame == NULL) {
 422                 printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc);
 423                 return;
 424         }
 425
 426         /* Grab the current frame */
 427         frame = usbvision->curFrame;
 428
 429         /* Optionally start at the beginning */
 430         if (fullframe) {
 431                 frame->curline = 0;
 432                 frame->scanlength = 0;
 433         }
 434
 435         /* Form every scan line */
 436         for (; frame->curline < frame->frmheight; frame->curline++) {
 437                 int i;
 438
 439                 f = frame->data + (usbvision->curwidth * 3 * frame->curline);
 440                 for (i = 0; i < usbvision->curwidth; i++) {
 441                         unsigned char cb = 0x80;
 442                         unsigned char cg = 0;
 443                         unsigned char cr = 0;
 444
 445                         if (pmode == 1) {
 446                                 if (frame->curline % 32 == 0)
 447                                         cb = 0, cg = cr = 0xFF;
 448                                 else if (i % 32 == 0) {
 449                                         if (frame->curline % 32 == 1)
 450                                                 num_cell++;
 451                                         cb = 0, cg = cr = 0xFF;
 452                                 } else {
 453                                         cb =
 454                                             ((num_cell * 7) +
 455                                              num_pass) & 0xFF;
 456                                         cg =
 457                                             ((num_cell * 5) +
 458                                              num_pass * 2) & 0xFF;
 459                                         cr =
 460                                             ((num_cell * 3) +
 461                                              num_pass * 3) & 0xFF;
 462                                 }
 463                         } else {
 464                                 /* Just the blue screen */
 465                         }
 466
 467                         *f++ = cb;
 468                         *f++ = cg;
 469                         *f++ = cr;
 470                         scan_length += 3;
 471                 }
 472         }
 473
 474         frame->grabstate = FrameState_Done;
 475         frame->scanlength += scan_length;
 476         ++num_pass;
 477
 478 }
 479
 480 /*
 481  * usbvision_decompress_alloc()
 482  *
 483  * allocates intermediate buffer for decompression
 484  */
 485 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
 486 {
 487         int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
 488         usbvision->IntraFrameBuffer = vmalloc_32(IFB_size);
 489         if (usbvision->IntraFrameBuffer == NULL) {
 490                 err("%s: unable to allocate %d for compr. frame buffer", __FUNCTION__, IFB_size);
 491                 return -ENOMEM;
 492         }
 493         return 0;
 494 }
 495
 496 /*
 497  * usbvision_decompress_free()
 498  *
 499  * frees intermediate buffer for decompression
 500  */
 501 void usbvision_decompress_free(struct usb_usbvision *usbvision)
 502 {
 503         if (usbvision->IntraFrameBuffer != NULL) {
 504                 vfree(usbvision->IntraFrameBuffer);
 505                 usbvision->IntraFrameBuffer = NULL;
 506         }
 507 }
 508
 509 /************************************************************
 510  * Here comes the data parsing stuff that is run as interrupt
 511  ************************************************************/
 512 /*
 513  * usbvision_find_header()
 514  *
 515  * Locate one of supported header markers in the scratch buffer.
 516  */
 517 static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision)
 518 {
 519         struct usbvision_frame *frame;
 520         int foundHeader = 0;
 521
 522         frame = usbvision->curFrame;
 523
 524         while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) {
 525                 // found header in scratch
 526                 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
 527                                 frame->isocHeader.magic_2,
 528                                 frame->isocHeader.magic_1,
 529                                 frame->isocHeader.headerLength,
 530                                 frame->isocHeader.frameNum,
 531                                 frame->isocHeader.framePhase,
 532                                 frame->isocHeader.frameLatency,
 533                                 frame->isocHeader.dataFormat,
 534                                 frame->isocHeader.formatParam,
 535                                 frame->isocHeader.frameWidth,
 536                                 frame->isocHeader.frameHeight);
 537
 538                 if (usbvision->requestIntra) {
 539                         if (frame->isocHeader.formatParam & 0x80) {
 540                                 foundHeader = 1;
 541                                 usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time
 542                                 usbvision_unrequest_intra(usbvision);
 543                                 break;
 544                         }
 545                 }
 546                 else {
 547                         foundHeader = 1;
 548                         break;
 549                 }
 550         }
 551
 552         if (foundHeader) {
 553                 frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width;
 554                 frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height;
 555                 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3;
 556         }
 557         else { // no header found
 558                 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
 559                 scratch_reset(usbvision);
 560                 return ParseState_EndParse;
 561         }
 562
 563         // found header
 564         if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) {
 565                 //check isocHeader.frameNum for lost frames
 566                 if (usbvision->lastIsocFrameNum >= 0) {
 567                         if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) {
 568                                 // unexpected frame drop: need to request new intra frame
 569                                 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum);
 570                                 usbvision_request_intra(usbvision);
 571                                 return ParseState_NextFrame;
 572                         }
 573                 }
 574                 usbvision->lastIsocFrameNum = frame->isocHeader.frameNum;
 575         }
 576         usbvision->header_count++;
 577         frame->scanstate = ScanState_Lines;
 578         frame->curline = 0;
 579
 580         if (force_testpattern) {
 581                 usbvision_testpattern(usbvision, 1, 1);
 582                 return ParseState_NextFrame;
 583         }
 584         return ParseState_Continue;
 585 }
 586
 587 static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision,
 588                                            long *pcopylen)
 589 {
 590         volatile struct usbvision_frame *frame;
 591         unsigned char *f;
 592         int len;
 593         int i;
 594         unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components
 595         unsigned char rv, gv, bv;       // RGB components
 596         int clipmask_index, bytes_per_pixel;
 597         int stretch_bytes, clipmask_add;
 598
 599         frame  = usbvision->curFrame;
 600         f = frame->data + (frame->v4l2_linesize * frame->curline);
 601
 602         /* Make sure there's enough data for the entire line */
 603         len = (frame->isocHeader.frameWidth * 2)+5;
 604         if (scratch_len(usbvision) < len) {
 605                 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
 606                 return ParseState_Out;
 607         }
 608
 609         if ((frame->curline + 1) >= frame->frmheight) {
 610                 return ParseState_NextFrame;
 611         }
 612
 613         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
 614         stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
 615         clipmask_index = frame->curline * MAX_FRAME_WIDTH;
 616         clipmask_add = usbvision->stretch_width;
 617
 618         for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) {
 619
 620                 scratch_get(usbvision, &yuyv[0], 4);
 621
 622                 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 623                         *f++ = yuyv[0]; // Y
 624                         *f++ = yuyv[3]; // U
 625                 }
 626                 else {
 627
 628                         YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
 629                         switch (frame->v4l2_format.format) {
 630                                 case V4L2_PIX_FMT_RGB565:
 631                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
 632                                         *f++ = (0x07 & (gv >> 5)) | (0xF8 &  rv);
 633                                         break;
 634                                 case V4L2_PIX_FMT_RGB24:
 635                                         *f++ = bv;
 636                                         *f++ = gv;
 637                                         *f++ = rv;
 638                                         break;
 639                                 case V4L2_PIX_FMT_RGB32:
 640                                         *f++ = bv;
 641                                         *f++ = gv;
 642                                         *f++ = rv;
 643                                         f++;
 644                                         break;
 645                                 case V4L2_PIX_FMT_RGB555:
 646                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
 647                                         *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
 648                                         break;
 649                         }
 650                 }
 651                 clipmask_index += clipmask_add;
 652                 f += stretch_bytes;
 653
 654                 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 655                         *f++ = yuyv[2]; // Y
 656                         *f++ = yuyv[1]; // V
 657                 }
 658                 else {
 659
 660                         YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
 661                         switch (frame->v4l2_format.format) {
 662                                 case V4L2_PIX_FMT_RGB565:
 663                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
 664                                         *f++ = (0x07 & (gv >> 5)) | (0xF8 &  rv);
 665                                         break;
 666                                 case V4L2_PIX_FMT_RGB24:
 667                                         *f++ = bv;
 668                                         *f++ = gv;
 669                                         *f++ = rv;
 670                                         break;
 671                                 case V4L2_PIX_FMT_RGB32:
 672                                         *f++ = bv;
 673                                         *f++ = gv;
 674                                         *f++ = rv;
 675                                         f++;
 676                                         break;
 677                                 case V4L2_PIX_FMT_RGB555:
 678                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
 679                                         *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
 680                                         break;
 681                         }
 682                 }
 683                 clipmask_index += clipmask_add;
 684                 f += stretch_bytes;
 685         }
 686
 687         frame->curline += usbvision->stretch_height;
 688         *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
 689
 690         if (frame->curline >= frame->frmheight) {
 691                 return ParseState_NextFrame;
 692         }
 693         else {
 694                 return ParseState_Continue;
 695         }
 696 }
 697
 698 /* The decompression routine  */
 699 static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed,
 700                                                                 unsigned char *Decompressed, int *StartPos,
 701                                                                 int *BlockTypeStartPos, int Len)
 702 {
 703         int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen;
 704         unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator;
 705
 706         Integrator = 0;
 707         Pos = *StartPos;
 708         BlockTypePos = *BlockTypeStartPos;
 709         MaxPos = 396; //Pos + Len;
 710         ExtraPos = Pos;
 711         BlockLen = 0;
 712         BlockByte = 0;
 713         BlockCode = 0;
 714         BlockType = 0;
 715         BlockTypeByte = 0;
 716         BlockTypeLen = 0;
 717         RestPixel = Len;
 718
 719         for (Idx = 0; Idx < Len; Idx++) {
 720
 721                 if (BlockLen == 0) {
 722                         if (BlockTypeLen==0) {
 723                                 BlockTypeByte = Compressed[BlockTypePos];
 724                                 BlockTypePos++;
 725                                 BlockTypeLen = 4;
 726                         }
 727                         BlockType = (BlockTypeByte & 0xC0) >> 6;
 728
 729                         //statistic:
 730                         usbvision->ComprBlockTypes[BlockType]++;
 731
 732                         Pos = ExtraPos;
 733                         if (BlockType == 0) {
 734                                 if(RestPixel >= 24) {
 735                                         Idx += 23;
 736                                         RestPixel -= 24;
 737                                         Integrator = Decompressed[Idx];
 738                                 } else {
 739                                         Idx += RestPixel - 1;
 740                                         RestPixel = 0;
 741                                 }
 742                         } else {
 743                                 BlockCode = Compressed[Pos];
 744                                 Pos++;
 745                                 if (RestPixel >= 24) {
 746                                         BlockLen  = 24;
 747                                 } else {
 748                                         BlockLen = RestPixel;
 749                                 }
 750                                 RestPixel -= BlockLen;
 751                                 ExtraPos = Pos + (BlockLen / 4);
 752                         }
 753                         BlockTypeByte <<= 2;
 754                         BlockTypeLen -= 1;
 755                 }
 756                 if (BlockLen > 0) {
 757                         if ((BlockLen%4) == 0) {
 758                                 BlockByte = Compressed[Pos];
 759                                 Pos++;
 760                         }
 761                         if (BlockType == 1) { //inter Block
 762                                 Integrator = Decompressed[Idx];
 763                         }
 764                         switch (BlockByte & 0xC0) {
 765                                 case 0x03<<6:
 766                                         Integrator += Compressed[ExtraPos];
 767                                         ExtraPos++;
 768                                         break;
 769                                 case 0x02<<6:
 770                                         Integrator += BlockCode;
 771                                         break;
 772                                 case 0x00:
 773                                         Integrator -= BlockCode;
 774                                         break;
 775                         }
 776                         Decompressed[Idx] = Integrator;
 777                         BlockByte <<= 2;
 778                         BlockLen -= 1;
 779                 }
 780         }
 781         *StartPos = ExtraPos;
 782         *BlockTypeStartPos = BlockTypePos;
 783         return Idx;
 784 }
 785
 786
 787 /*
 788  * usbvision_parse_compress()
 789  *
 790  * Parse compressed frame from the scratch buffer, put
 791  * decoded RGB value into the current frame buffer and add the written
 792  * number of bytes (RGB) to the *pcopylen.
 793  *
 794  */
 795 static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision,
 796                                            long *pcopylen)
 797 {
 798 #define USBVISION_STRIP_MAGIC           0x5A
 799 #define USBVISION_STRIP_LEN_MAX         400
 800 #define USBVISION_STRIP_HEADER_LEN      3
 801
 802         struct usbvision_frame *frame;
 803         unsigned char *f,*u = NULL ,*v = NULL;
 804         unsigned char StripData[USBVISION_STRIP_LEN_MAX];
 805         unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN];
 806         int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos;
 807         int clipmask_index, bytes_per_pixel, rc;
 808         int imageSize;
 809         unsigned char rv, gv, bv;
 810         static unsigned char *Y, *U, *V;
 811
 812         frame  = usbvision->curFrame;
 813         imageSize = frame->frmwidth * frame->frmheight;
 814         if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
 815              (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) {       // this is a planar format
 816                 //... v4l2_linesize not used here.
 817                 f = frame->data + (frame->width * frame->curline);
 818         } else
 819                 f = frame->data + (frame->v4l2_linesize * frame->curline);
 820
 821         if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers
 822                 // get base of u and b planes add halfoffset
 823
 824                 u = frame->data
 825                         + imageSize
 826                         + (frame->frmwidth >>1) * frame->curline ;
 827                 v = u + (imageSize >>1 );
 828
 829         } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){
 830
 831                 v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ;
 832                 u = v + (imageSize >>2) ;
 833         }
 834
 835         if (frame->curline == 0) {
 836                 usbvision_adjust_compression(usbvision);
 837         }
 838
 839         if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) {
 840                 return ParseState_Out;
 841         }
 842
 843         //get strip header without changing the scratch_read_ptr
 844         scratch_set_extra_ptr(usbvision, &StripPtr, 0);
 845         scratch_get_extra(usbvision, &StripHeader[0], &StripPtr,
 846                                 USBVISION_STRIP_HEADER_LEN);
 847
 848         if (StripHeader[0] != USBVISION_STRIP_MAGIC) {
 849                 // wrong strip magic
 850                 usbvision->stripMagicErrors++;
 851                 return ParseState_NextFrame;
 852         }
 853
 854         if (frame->curline != (int)StripHeader[2]) {
 855                 //line number missmatch error
 856                 usbvision->stripLineNumberErrors++;
 857         }
 858
 859         StripLen = 2 * (unsigned int)StripHeader[1];
 860         if (StripLen > USBVISION_STRIP_LEN_MAX) {
 861                 // strip overrun
 862                 // I think this never happens
 863                 usbvision_request_intra(usbvision);
 864         }
 865
 866         if (scratch_len(usbvision) < StripLen) {
 867                 //there is not enough data for the strip
 868                 return ParseState_Out;
 869         }
 870
 871         if (usbvision->IntraFrameBuffer) {
 872                 Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline;
 873                 U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2);
 874                 V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
 875         }
 876         else {
 877                 return ParseState_NextFrame;
 878         }
 879
 880         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
 881         clipmask_index = frame->curline * MAX_FRAME_WIDTH;
 882
 883         scratch_get(usbvision, StripData, StripLen);
 884
 885         IdxEnd = frame->frmwidth;
 886         BlockTypePos = USBVISION_STRIP_HEADER_LEN;
 887         StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2;
 888         BlockPos = StartBlockPos;
 889
 890         usbvision->BlockPos = BlockPos;
 891
 892         if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) {
 893                 //return ParseState_Continue;
 894         }
 895         if (StripLen > usbvision->maxStripLen) {
 896                 usbvision->maxStripLen = StripLen;
 897         }
 898
 899         if (frame->curline%2) {
 900                 if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
 901                 //return ParseState_Continue;
 902                 }
 903         }
 904         else {
 905                 if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
 906                         //return ParseState_Continue;
 907                 }
 908         }
 909
 910         if (BlockPos > usbvision->comprBlockPos) {
 911                 usbvision->comprBlockPos = BlockPos;
 912         }
 913         if (BlockPos > StripLen) {
 914                 usbvision->stripLenErrors++;
 915         }
 916
 917         for (Idx = 0; Idx < IdxEnd; Idx++) {
 918                 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 919                         *f++ = Y[Idx];
 920                         *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2];
 921                 }
 922                 else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
 923                         *f++ = Y[Idx];
 924                         if ( Idx & 0x01)
 925                                 *u++ = U[Idx>>1] ;
 926                         else
 927                                 *v++ = V[Idx>>1];
 928                 }
 929                 else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
 930                         *f++ = Y [Idx];
 931                         if ( !((  Idx & 0x01  ) | (  frame->curline & 0x01  )) ){
 932
 933 /*                               only need do this for 1 in 4 pixels */
 934 /*                               intraframe buffer is YUV420 format */
 935
 936                                 *u++ = U[Idx >>1];
 937                                 *v++ = V[Idx >>1];
 938                         }
 939
 940                 }
 941                 else {
 942                         YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv);
 943                         switch (frame->v4l2_format.format) {
 944                                 case V4L2_PIX_FMT_GREY:
 945                                         *f++ = Y[Idx];
 946                                         break;
 947                                 case V4L2_PIX_FMT_RGB555:
 948                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
 949                                         *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
 950                                         break;
 951                                 case V4L2_PIX_FMT_RGB565:
 952                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
 953                                         *f++ = (0x07 & (gv >> 5)) | (0xF8 &  rv);
 954                                         break;
 955                                 case V4L2_PIX_FMT_RGB24:
 956                                         *f++ = bv;
 957                                         *f++ = gv;
 958                                         *f++ = rv;
 959                                         break;
 960                                 case V4L2_PIX_FMT_RGB32:
 961                                         *f++ = bv;
 962                                         *f++ = gv;
 963                                         *f++ = rv;
 964                                         f++;
 965                                         break;
 966                         }
 967                 }
 968                 clipmask_index++;
 969         }
 970         /* Deal with non-integer no. of bytes for YUV420P */
 971         if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 )
 972                 *pcopylen += frame->v4l2_linesize;
 973         else
 974                 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
 975
 976         frame->curline += 1;
 977
 978         if (frame->curline >= frame->frmheight) {
 979                 return ParseState_NextFrame;
 980         }
 981         else {
 982                 return ParseState_Continue;
 983         }
 984
 985 }
 986
 987
 988 /*
 989  * usbvision_parse_lines_420()
 990  *
 991  * Parse two lines from the scratch buffer, put
 992  * decoded RGB value into the current frame buffer and add the written
 993  * number of bytes (RGB) to the *pcopylen.
 994  *
 995  */
 996 static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision,
 997                                            long *pcopylen)
 998 {
 999         struct usbvision_frame *frame;
1000         unsigned char *f_even = NULL, *f_odd = NULL;
1001         unsigned int pixel_per_line, block;
1002         int pixel, block_split;
1003         int y_ptr, u_ptr, v_ptr, y_odd_offset;
1004         const int   y_block_size = 128;
1005         const int  uv_block_size = 64;
1006         const int sub_block_size = 32;
1007         const int y_step[] = { 0, 0, 0, 2 },  y_step_size = 4;
1008         const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4;
1009         unsigned char y[2], u, v;       /* YUV components */
1010         int y_, u_, v_, vb, uvg, ur;
1011         int r_, g_, b_;                 /* RGB components */
1012         unsigned char g;
1013         int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
1014         int clipmask_add, stretch_bytes;
1015
1016         frame  = usbvision->curFrame;
1017         f_even = frame->data + (frame->v4l2_linesize * frame->curline);
1018         f_odd  = f_even + frame->v4l2_linesize * usbvision->stretch_height;
1019
1020         /* Make sure there's enough data for the entire line */
1021         /* In this mode usbvision transfer 3 bytes for every 2 pixels */
1022         /* I need two lines to decode the color */
1023         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
1024         stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
1025         clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
1026         clipmask_odd_index  = clipmask_even_index + MAX_FRAME_WIDTH;
1027         clipmask_add = usbvision->stretch_width;
1028         pixel_per_line = frame->isocHeader.frameWidth;
1029
1030         if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
1031                 //printk(KERN_DEBUG "out of data, need %d\n", len);
1032                 return ParseState_Out;
1033         }
1034
1035         if ((frame->curline + 1) >= frame->frmheight) {
1036                 return ParseState_NextFrame;
1037         }
1038
1039         block_split = (pixel_per_line%y_block_size) ? 1 : 0;    //are some blocks splitted into different lines?
1040
1041         y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
1042                         + block_split * uv_block_size;
1043
1044         scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
1045         scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
1046         scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
1047                         + (4 - block_split) * sub_block_size);
1048
1049         for (block = 0; block < (pixel_per_line / sub_block_size);
1050              block++) {
1051
1052
1053                 for (pixel = 0; pixel < sub_block_size; pixel +=2) {
1054                         scratch_get(usbvision, &y[0], 2);
1055                         scratch_get_extra(usbvision, &u, &u_ptr, 1);
1056                         scratch_get_extra(usbvision, &v, &v_ptr, 1);
1057
1058                         //I don't use the YUV_TO_RGB macro for better performance
1059                         v_ = v - 128;
1060                         u_ = u - 128;
1061                         vb =              132252 * v_;
1062                         uvg= -53281 * u_ - 25625 * v_;
1063                         ur = 104595 * u_;
1064
1065                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1066                                 *f_even++ = y[0];
1067                                 *f_even++ = v;
1068                         }
1069                         else {
1070                                 y_ = 76284 * (y[0] - 16);
1071
1072                                 b_ = (y_ + vb) >> 16;
1073                                 g_ = (y_ + uvg)>> 16;
1074                                 r_ = (y_ + ur) >> 16;
1075
1076                                 switch (frame->v4l2_format.format) {
1077                                         case V4L2_PIX_FMT_RGB565:
1078                                                 g = LIMIT_RGB(g_);
1079                                                 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1080                                                 *f_even++ = (0x07 & (          g   >> 5)) | (0xF8 & LIMIT_RGB(r_));
1081                                                 break;
1082                                         case V4L2_PIX_FMT_RGB24:
1083                                                 *f_even++ = LIMIT_RGB(b_);
1084                                                 *f_even++ = LIMIT_RGB(g_);
1085                                                 *f_even++ = LIMIT_RGB(r_);
1086                                                 break;
1087                                         case V4L2_PIX_FMT_RGB32:
1088                                                 *f_even++ = LIMIT_RGB(b_);
1089                                                 *f_even++ = LIMIT_RGB(g_);
1090                                                 *f_even++ = LIMIT_RGB(r_);
1091                                                 f_even++;
1092                                                 break;
1093                                         case V4L2_PIX_FMT_RGB555:
1094                                                 g = LIMIT_RGB(g_);
1095                                                 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1096                                                 *f_even++ = (0x03 & (          g   >> 6)) |
1097                                                             (0x7C & (LIMIT_RGB(r_) >> 1));
1098                                                 break;
1099                                 }
1100                         }
1101                         clipmask_even_index += clipmask_add;
1102                         f_even += stretch_bytes;
1103
1104                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1105                                 *f_even++ = y[1];
1106                                 *f_even++ = u;
1107                         }
1108                         else {
1109                                 y_ = 76284 * (y[1] - 16);
1110
1111                                 b_ = (y_ + vb) >> 16;
1112                                 g_ = (y_ + uvg)>> 16;
1113                                 r_ = (y_ + ur) >> 16;
1114
1115                                 switch (frame->v4l2_format.format) {
1116                                         case V4L2_PIX_FMT_RGB565:
1117                                                 g = LIMIT_RGB(g_);
1118                                                 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1119                                                 *f_even++ = (0x07 & (          g   >> 5)) | (0xF8 & LIMIT_RGB(r_));
1120                                                 break;
1121                                         case V4L2_PIX_FMT_RGB24:
1122                                                 *f_even++ = LIMIT_RGB(b_);
1123                                                 *f_even++ = LIMIT_RGB(g_);
1124                                                 *f_even++ = LIMIT_RGB(r_);
1125                                                 break;
1126                                         case V4L2_PIX_FMT_RGB32:
1127                                                 *f_even++ = LIMIT_RGB(b_);
1128                                                 *f_even++ = LIMIT_RGB(g_);
1129                                                 *f_even++ = LIMIT_RGB(r_);
1130                                                 f_even++;
1131                                                 break;
1132                                         case V4L2_PIX_FMT_RGB555:
1133                                                 g = LIMIT_RGB(g_);
1134                                                 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1135                                                 *f_even++ = (0x03 & (          g   >> 6)) |
1136                                                             (0x7C & (LIMIT_RGB(r_) >> 1));
1137                                                 break;
1138                                 }
1139                         }
1140                         clipmask_even_index += clipmask_add;
1141                         f_even += stretch_bytes;
1142
1143                         scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1144
1145                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1146                                 *f_odd++ = y[0];
1147                                 *f_odd++ = v;
1148                         }
1149                         else {
1150                                 y_ = 76284 * (y[0] - 16);
1151
1152                                 b_ = (y_ + vb) >> 16;
1153                                 g_ = (y_ + uvg)>> 16;
1154                                 r_ = (y_ + ur) >> 16;
1155
1156                                 switch (frame->v4l2_format.format) {
1157                                         case V4L2_PIX_FMT_RGB565:
1158                                                 g = LIMIT_RGB(g_);
1159                                                 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1160                                                 *f_odd++ = (0x07 & (          g   >> 5)) | (0xF8 & LIMIT_RGB(r_));
1161                                                 break;
1162                                         case V4L2_PIX_FMT_RGB24:
1163                                                 *f_odd++ = LIMIT_RGB(b_);
1164                                                 *f_odd++ = LIMIT_RGB(g_);
1165                                                 *f_odd++ = LIMIT_RGB(r_);
1166                                                 break;
1167                                         case V4L2_PIX_FMT_RGB32:
1168                                                 *f_odd++ = LIMIT_RGB(b_);
1169                                                 *f_odd++ = LIMIT_RGB(g_);
1170                                                 *f_odd++ = LIMIT_RGB(r_);
1171                                                 f_odd++;
1172                                                 break;
1173                                         case V4L2_PIX_FMT_RGB555:
1174                                                 g = LIMIT_RGB(g_);
1175                                                 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1176                                                 *f_odd++ = (0x03 & (          g   >> 6)) |
1177                                                            (0x7C & (LIMIT_RGB(r_) >> 1));
1178                                                 break;
1179                                 }
1180                         }
1181                         clipmask_odd_index += clipmask_add;
1182                         f_odd += stretch_bytes;
1183
1184                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1185                                 *f_odd++ = y[1];
1186                                 *f_odd++ = u;
1187                         }
1188                         else {
1189                                 y_ = 76284 * (y[1] - 16);
1190
1191                                 b_ = (y_ + vb) >> 16;
1192                                 g_ = (y_ + uvg)>> 16;
1193                                 r_ = (y_ + ur) >> 16;
1194
1195                                 switch (frame->v4l2_format.format) {
1196                                         case V4L2_PIX_FMT_RGB565:
1197                                                 g = LIMIT_RGB(g_);
1198                                                 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1199                                                 *f_odd++ = (0x07 & (          g   >> 5)) | (0xF8 & LIMIT_RGB(r_));
1200                                                 break;
1201                                         case V4L2_PIX_FMT_RGB24:
1202                                                 *f_odd++ = LIMIT_RGB(b_);
1203                                                 *f_odd++ = LIMIT_RGB(g_);
1204                                                 *f_odd++ = LIMIT_RGB(r_);
1205                                                 break;
1206                                         case V4L2_PIX_FMT_RGB32:
1207                                                 *f_odd++ = LIMIT_RGB(b_);
1208                                                 *f_odd++ = LIMIT_RGB(g_);
1209                                                 *f_odd++ = LIMIT_RGB(r_);
1210                                                 f_odd++;
1211                                                 break;
1212                                         case V4L2_PIX_FMT_RGB555:
1213                                                 g = LIMIT_RGB(g_);
1214                                                 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1215                                                 *f_odd++ = (0x03 & (          g   >> 6)) |
1216                                                            (0x7C & (LIMIT_RGB(r_) >> 1));
1217                                                 break;
1218                                 }
1219                         }
1220                         clipmask_odd_index += clipmask_add;
1221                         f_odd += stretch_bytes;
1222                 }
1223
1224                 scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size);
1225                 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1226                                 * sub_block_size);
1227                 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1228                                 * sub_block_size);
1229                 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1230                                 * sub_block_size);
1231         }
1232
1233         scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1234                         + block_split * sub_block_size);
1235
1236         frame->curline += 2 * usbvision->stretch_height;
1237         *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1238
1239         if (frame->curline >= frame->frmheight)
1240                 return ParseState_NextFrame;
1241         else
1242                 return ParseState_Continue;
1243 }
1244
1245 /*
1246  * usbvision_parse_data()
1247  *
1248  * Generic routine to parse the scratch buffer. It employs either
1249  * usbvision_find_header() or usbvision_parse_lines() to do most
1250  * of work.
1251  *
1252  */
1253 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1254 {
1255         struct usbvision_frame *frame;
1256         enum ParseState newstate;
1257         long copylen = 0;
1258         unsigned long lock_flags;
1259
1260         frame = usbvision->curFrame;
1261
1262         PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1263
1264         while (1) {
1265
1266                 newstate = ParseState_Out;
1267                 if (scratch_len(usbvision)) {
1268                         if (frame->scanstate == ScanState_Scanning) {
1269                                 newstate = usbvision_find_header(usbvision);
1270                         }
1271                         else if (frame->scanstate == ScanState_Lines) {
1272                                 if (usbvision->isocMode == ISOC_MODE_YUV420) {
1273                                         newstate = usbvision_parse_lines_420(usbvision, &copylen);
1274                                 }
1275                                 else if (usbvision->isocMode == ISOC_MODE_YUV422) {
1276                                         newstate = usbvision_parse_lines_422(usbvision, &copylen);
1277                                 }
1278                                 else if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
1279                                         newstate = usbvision_parse_compress(usbvision, &copylen);
1280                                 }
1281
1282                         }
1283                 }
1284                 if (newstate == ParseState_Continue) {
1285                         continue;
1286                 }
1287                 else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) {
1288                         break;
1289                 }
1290                 else {
1291                         return; /* ParseState_EndParse */
1292                 }
1293         }
1294
1295         if (newstate == ParseState_NextFrame) {
1296                 frame->grabstate = FrameState_Done;
1297                 do_gettimeofday(&(frame->timestamp));
1298                 frame->sequence = usbvision->frame_num;
1299
1300                 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1301                 list_move_tail(&(frame->frame), &usbvision->outqueue);
1302                 usbvision->curFrame = NULL;
1303                 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1304
1305                 usbvision->frame_num++;
1306
1307                 /* This will cause the process to request another frame. */
1308                 if (waitqueue_active(&usbvision->wait_frame)) {
1309                         PDEBUG(DBG_PARSE, "Wake up !");
1310                         wake_up_interruptible(&usbvision->wait_frame);
1311                 }
1312         }
1313         else
1314                 frame->grabstate = FrameState_Grabbing;
1315
1316
1317         /* Update the frame's uncompressed length. */
1318         frame->scanlength += copylen;
1319 }
1320
1321
1322 /*
1323  * Make all of the blocks of data contiguous
1324  */
1325 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1326                                           struct urb *urb)
1327 {
1328         unsigned char *packet_data;
1329         int i, totlen = 0;
1330
1331         for (i = 0; i < urb->number_of_packets; i++) {
1332                 int packet_len = urb->iso_frame_desc[i].actual_length;
1333                 int packet_stat = urb->iso_frame_desc[i].status;
1334
1335                 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1336
1337                 /* Detect and ignore errored packets */
1338                 if (packet_stat) {      // packet_stat != 0 ?????????????
1339                         PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1340                         usbvision->isocErrCount++;
1341                         continue;
1342                 }
1343
1344                 /* Detect and ignore empty packets */
1345                 if (packet_len < 0) {
1346                         PDEBUG(DBG_ISOC, "error packet [%d]", i);
1347                         usbvision->isocSkipCount++;
1348                         continue;
1349                 }
1350                 else if (packet_len == 0) {     /* Frame end ????? */
1351                         PDEBUG(DBG_ISOC, "null packet [%d]", i);
1352                         usbvision->isocstate=IsocState_NoFrame;
1353                         usbvision->isocSkipCount++;
1354                         continue;
1355                 }
1356                 else if (packet_len > usbvision->isocPacketSize) {
1357                         PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i);
1358                         usbvision->isocSkipCount++;
1359                         continue;
1360                 }
1361
1362                 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1363
1364                 if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins
1365                         usbvision->isocstate=IsocState_InFrame;
1366                         scratch_mark_header(usbvision);
1367                         usbvision_measure_bandwidth(usbvision);
1368                         PDEBUG(DBG_ISOC, "packet with header");
1369                 }
1370
1371                 /*
1372                  * If usbvision continues to feed us with data but there is no
1373                  * consumption (if, for example, V4L client fell asleep) we
1374                  * may overflow the buffer. We have to move old data over to
1375                  * free room for new data. This is bad for old data. If we
1376                  * just drop new data then it's bad for new data... choose
1377                  * your favorite evil here.
1378                  */
1379                 if (scratch_free(usbvision) < packet_len) {
1380
1381                         usbvision->scratch_ovf_count++;
1382                         PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1383                                scratch_len(usbvision), packet_len);
1384                         scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1385                 }
1386
1387                 /* Now we know that there is enough room in scratch buffer */
1388                 scratch_put(usbvision, packet_data, packet_len);
1389                 totlen += packet_len;
1390                 usbvision->isocDataCount += packet_len;
1391                 usbvision->isocPacketCount++;
1392         }
1393 #if ENABLE_HEXDUMP
1394         if (totlen > 0) {
1395                 static int foo = 0;
1396                 if (foo < 1) {
1397                         printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1398                         usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1399                         ++foo;
1400                 }
1401         }
1402 #endif
1403  return totlen;
1404 }
1405
1406 static void usbvision_isocIrq(struct urb *urb)
1407 {
1408         int errCode = 0;
1409         int len;
1410         struct usb_usbvision *usbvision = urb->context;
1411         int i;
1412         unsigned long startTime = jiffies;
1413         struct usbvision_frame **f;
1414
1415         /* We don't want to do anything if we are about to be removed! */
1416         if (!USBVISION_IS_OPERATIONAL(usbvision))
1417                 return;
1418
1419         f = &usbvision->curFrame;
1420
1421         /* Manage streaming interruption */
1422         if (usbvision->streaming == Stream_Interrupt) {
1423                 usbvision->streaming = Stream_Idle;
1424                 if ((*f)) {
1425                         (*f)->grabstate = FrameState_Ready;
1426                         (*f)->scanstate = ScanState_Scanning;
1427                 }
1428                 PDEBUG(DBG_IRQ, "stream interrupted");
1429                 wake_up_interruptible(&usbvision->wait_stream);
1430         }
1431
1432         /* Copy the data received into our scratch buffer */
1433         len = usbvision_compress_isochronous(usbvision, urb);
1434
1435         usbvision->isocUrbCount++;
1436         usbvision->urb_length = len;
1437
1438         if (usbvision->streaming == Stream_On) {
1439
1440                 /* If we collected enough data let's parse! */
1441                 if (scratch_len(usbvision) > USBVISION_HEADER_LENGTH) { /* 12 == header_length */
1442                         /*If we don't have a frame we're current working on, complain */
1443                         if(!list_empty(&(usbvision->inqueue))) {
1444                                 if (!(*f)) {
1445                                         (*f) = list_entry(usbvision->inqueue.next,struct usbvision_frame, frame);
1446                                 }
1447                                 usbvision_parse_data(usbvision);
1448                         }
1449                         else {
1450                                 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1451                                 scratch_reset(usbvision);
1452                         }
1453                 }
1454         }
1455         else {
1456                 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1457                 scratch_reset(usbvision);
1458         }
1459
1460         usbvision->timeInIrq += jiffies - startTime;
1461
1462         for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1463                 urb->iso_frame_desc[i].status = 0;
1464                 urb->iso_frame_desc[i].actual_length = 0;
1465         }
1466
1467         urb->status = 0;
1468         urb->dev = usbvision->dev;
1469         errCode = usb_submit_urb (urb, GFP_ATOMIC);
1470
1471         /* Disable this warning.  By design of the driver. */
1472         //      if(errCode) {
1473         //              err("%s: usb_submit_urb failed: error %d", __FUNCTION__, errCode);
1474         //      }
1475
1476         return;
1477 }
1478
1479 /*************************************/
1480 /* Low level usbvision access functions */
1481 /*************************************/
1482
1483 /*
1484  * usbvision_read_reg()
1485  *
1486  * return  < 0 -> Error
1487  *        >= 0 -> Data
1488  */
1489
1490 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1491 {
1492         int errCode = 0;
1493         unsigned char buffer[1];
1494
1495         if (!USBVISION_IS_OPERATIONAL(usbvision))
1496                 return -1;
1497
1498         errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1499                                 USBVISION_OP_CODE,
1500                                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1501                                 0, (__u16) reg, buffer, 1, HZ);
1502
1503         if (errCode < 0) {
1504                 err("%s: failed: error %d", __FUNCTION__, errCode);
1505                 return errCode;
1506         }
1507         return buffer[0];
1508 }
1509
1510 /*
1511  * usbvision_write_reg()
1512  *
1513  * return 1 -> Reg written
1514  *        0 -> usbvision is not yet ready
1515  *       -1 -> Something went wrong
1516  */
1517
1518 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1519                             unsigned char value)
1520 {
1521         int errCode = 0;
1522
1523         if (!USBVISION_IS_OPERATIONAL(usbvision))
1524                 return 0;
1525
1526         errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1527                                 USBVISION_OP_CODE,
1528                                 USB_DIR_OUT | USB_TYPE_VENDOR |
1529                                 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
1530
1531         if (errCode < 0) {
1532                 err("%s: failed: error %d", __FUNCTION__, errCode);
1533         }
1534         return errCode;
1535 }
1536
1537
1538 static void usbvision_ctrlUrb_complete(struct urb *urb)
1539 {
1540         struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1541
1542         PDEBUG(DBG_IRQ, "");
1543         usbvision->ctrlUrbBusy = 0;
1544         if (waitqueue_active(&usbvision->ctrlUrb_wq)) {
1545                 wake_up_interruptible(&usbvision->ctrlUrb_wq);
1546         }
1547 }
1548
1549
1550 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address,
1551                                                                         unsigned char *data, int len)
1552 {
1553         int errCode = 0;
1554
1555         PDEBUG(DBG_IRQ, "");
1556         if (len > 8) {
1557                 return -EFAULT;
1558         }
1559 //      down(&usbvision->ctrlUrbLock);
1560         if (usbvision->ctrlUrbBusy) {
1561 //              up(&usbvision->ctrlUrbLock);
1562                 return -EBUSY;
1563         }
1564         usbvision->ctrlUrbBusy = 1;
1565 //      up(&usbvision->ctrlUrbLock);
1566
1567         usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1568         usbvision->ctrlUrbSetup.bRequest     = USBVISION_OP_CODE;
1569         usbvision->ctrlUrbSetup.wValue       = 0;
1570         usbvision->ctrlUrbSetup.wIndex       = cpu_to_le16(address);
1571         usbvision->ctrlUrbSetup.wLength      = cpu_to_le16(len);
1572         usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev,
1573                                                         usb_sndctrlpipe(usbvision->dev, 1),
1574                                                         (unsigned char *)&usbvision->ctrlUrbSetup,
1575                                                         (void *)usbvision->ctrlUrbBuffer, len,
1576                                                         usbvision_ctrlUrb_complete,
1577                                                         (void *)usbvision);
1578
1579         memcpy(usbvision->ctrlUrbBuffer, data, len);
1580
1581         errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC);
1582         if (errCode < 0) {
1583                 // error in usb_submit_urb()
1584                 usbvision->ctrlUrbBusy = 0;
1585         }
1586         PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode);
1587         return errCode;
1588 }
1589
1590
1591 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1592 {
1593         int errCode = 0;
1594
1595         usbvision->lastIsocFrameNum = -1;
1596         usbvision->isocDataCount = 0;
1597         usbvision->isocPacketCount = 0;
1598         usbvision->isocSkipCount = 0;
1599         usbvision->comprLevel = 50;
1600         usbvision->lastComprLevel = -1;
1601         usbvision->isocUrbCount = 0;
1602         usbvision->requestIntra = 1;
1603         usbvision->isocMeasureBandwidthCount = 0;
1604
1605         return errCode;
1606 }
1607
1608 /* this function measures the used bandwidth since last call
1609  * return:    0 : no error
1610  * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize
1611  */
1612 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision)
1613 {
1614         int errCode = 0;
1615
1616         if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames
1617                 usbvision->isocMeasureBandwidthCount++;
1618                 return errCode;
1619         }
1620         if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) {
1621                 usbvision->usedBandwidth = usbvision->isocDataCount /
1622                                         (usbvision->isocPacketCount + usbvision->isocSkipCount) *
1623                                         100 / usbvision->isocPacketSize;
1624         }
1625         usbvision->isocMeasureBandwidthCount = 0;
1626         usbvision->isocDataCount = 0;
1627         usbvision->isocPacketCount = 0;
1628         usbvision->isocSkipCount = 0;
1629         return errCode;
1630 }
1631
1632 static int usbvision_adjust_compression (struct usb_usbvision *usbvision)
1633 {
1634         int errCode = 0;
1635         unsigned char buffer[6];
1636
1637         PDEBUG(DBG_IRQ, "");
1638         if ((adjustCompression) && (usbvision->usedBandwidth > 0)) {
1639                 usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2;
1640                 RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100);
1641                 if (usbvision->comprLevel != usbvision->lastComprLevel) {
1642                         int distorsion;
1643                         if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) {
1644                                 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100);      // PCM Threshold 1
1645                                 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100);       // PCM Threshold 2
1646                                 distorsion = 7 + 248 * usbvision->comprLevel / 100;
1647                                 buffer[2] = (unsigned char)(distorsion & 0xFF);                         // Average distorsion Threshold (inter)
1648                                 buffer[3] = (unsigned char)(distorsion & 0xFF);                         // Average distorsion Threshold (intra)
1649                                 distorsion = 1 + 42 * usbvision->comprLevel / 100;
1650                                 buffer[4] = (unsigned char)(distorsion & 0xFF);                         // Maximum distorsion Threshold (inter)
1651                                 buffer[5] = (unsigned char)(distorsion & 0xFF);                         // Maximum distorsion Threshold (intra)
1652                         }
1653                         else { //BRIDGE_NT1003
1654                                 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100);      // PCM threshold 1
1655                                 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100);       // PCM threshold 2
1656                                 distorsion = 2 + 253 * usbvision->comprLevel / 100;
1657                                 buffer[2] = (unsigned char)(distorsion & 0xFF);                         // distorsion threshold bit0-7
1658                                 buffer[3] = 0;  //(unsigned char)((distorsion >> 8) & 0x0F);            // distorsion threshold bit 8-11
1659                                 distorsion = 0 + 43 * usbvision->comprLevel / 100;
1660                                 buffer[4] = (unsigned char)(distorsion & 0xFF);                         // maximum distorsion bit0-7
1661                                 buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01);             // maximum distorsion bit 8
1662                         }
1663                         errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1664                         if (errCode == 0){
1665                                 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1666                                                                 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1667                                 usbvision->lastComprLevel = usbvision->comprLevel;
1668                         }
1669                 }
1670         }
1671         return errCode;
1672 }
1673
1674 static int usbvision_request_intra (struct usb_usbvision *usbvision)
1675 {
1676         int errCode = 0;
1677         unsigned char buffer[1];
1678
1679         PDEBUG(DBG_IRQ, "");
1680         usbvision->requestIntra = 1;
1681         buffer[0] = 1;
1682         usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1683         return errCode;
1684 }
1685
1686 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision)
1687 {
1688         int errCode = 0;
1689         unsigned char buffer[1];
1690
1691         PDEBUG(DBG_IRQ, "");
1692         usbvision->requestIntra = 0;
1693         buffer[0] = 0;
1694         usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1695         return errCode;
1696 }
1697
1698 /*******************************
1699  * usbvision utility functions
1700  *******************************/
1701
1702 int usbvision_power_off(struct usb_usbvision *usbvision)
1703 {
1704         int errCode = 0;
1705
1706         PDEBUG(DBG_FUNC, "");
1707
1708         errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1709         if (errCode == 1) {
1710                 usbvision->power = 0;
1711         }
1712         PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode);
1713         return errCode;
1714 }
1715
1716 /*
1717  * usbvision_set_video_format()
1718  *
1719  */
1720 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1721 {
1722         static const char proc[] = "usbvision_set_video_format";
1723         int rc;
1724         unsigned char value[2];
1725
1726         if (!USBVISION_IS_OPERATIONAL(usbvision))
1727                 return 0;
1728
1729         PDEBUG(DBG_FUNC, "isocMode %#02x", format);
1730
1731         if ((format != ISOC_MODE_YUV422)
1732             && (format != ISOC_MODE_YUV420)
1733             && (format != ISOC_MODE_COMPRESS)) {
1734                 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1735                        format);
1736                 format = ISOC_MODE_YUV420;
1737         }
1738         value[0] = 0x0A;  //TODO: See the effect of the filter
1739         value[1] = format;
1740         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1741                              USBVISION_OP_CODE,
1742                              USB_DIR_OUT | USB_TYPE_VENDOR |
1743                              USB_RECIP_ENDPOINT, 0,
1744                              (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1745
1746         if (rc < 0) {
1747                 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1748                        "reconnect or reload driver.\n", proc, rc);
1749         }
1750         usbvision->isocMode = format;
1751         return rc;
1752 }
1753
1754 /*
1755  * usbvision_set_output()
1756  *
1757  */
1758
1759 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1760                          int height)
1761 {
1762         int errCode = 0;
1763         int UsbWidth, UsbHeight;
1764         unsigned int frameRate=0, frameDrop=0;
1765         unsigned char value[4];
1766
1767         if (!USBVISION_IS_OPERATIONAL(usbvision)) {
1768                 return 0;
1769         }
1770
1771         if (width > MAX_USB_WIDTH) {
1772                 UsbWidth = width / 2;
1773                 usbvision->stretch_width = 2;
1774         }
1775         else {
1776                 UsbWidth = width;
1777                 usbvision->stretch_width = 1;
1778         }
1779
1780         if (height > MAX_USB_HEIGHT) {
1781                 UsbHeight = height / 2;
1782                 usbvision->stretch_height = 2;
1783         }
1784         else {
1785                 UsbHeight = height;
1786                 usbvision->stretch_height = 1;
1787         }
1788
1789         RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1790         UsbWidth &= ~(MIN_FRAME_WIDTH-1);
1791         RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1792         UsbHeight &= ~(1);
1793
1794         PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1795                                                 UsbWidth, UsbHeight, width, height,
1796                                                 usbvision->stretch_width, usbvision->stretch_height);
1797
1798         /* I'll not rewrite the same values */
1799         if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) {
1800                 value[0] = UsbWidth & 0xff;             //LSB
1801                 value[1] = (UsbWidth >> 8) & 0x03;      //MSB
1802                 value[2] = UsbHeight & 0xff;            //LSB
1803                 value[3] = (UsbHeight >> 8) & 0x03;     //MSB
1804
1805                 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1806                              USBVISION_OP_CODE,
1807                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1808                                  0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1809
1810                 if (errCode < 0) {
1811                         err("%s failed: error %d", __FUNCTION__, errCode);
1812                         return errCode;
1813                 }
1814                 usbvision->curwidth = usbvision->stretch_width * UsbWidth;
1815                 usbvision->curheight = usbvision->stretch_height * UsbHeight;
1816         }
1817
1818         if (usbvision->isocMode == ISOC_MODE_YUV422) {
1819                 frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2);
1820         }
1821         else if (usbvision->isocMode == ISOC_MODE_YUV420) {
1822                 frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8);
1823         }
1824         else {
1825                 frameRate = FRAMERATE_MAX;
1826         }
1827
1828         if (usbvision->tvnorm->id & V4L2_STD_625_50) {
1829                 frameDrop = frameRate * 32 / 25 - 1;
1830         }
1831         else if (usbvision->tvnorm->id & V4L2_STD_525_60) {
1832                 frameDrop = frameRate * 32 / 30 - 1;
1833         }
1834
1835         RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX);
1836
1837         PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop);
1838
1839         frameDrop = FRAMERATE_MAX;      // We can allow the maximum here, because dropping is controlled
1840
1841         /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1842                 => frameSkip = 4;
1843                 => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1844
1845            frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1846             => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1847                 => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1848         */
1849         errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop);
1850         return errCode;
1851 }
1852
1853
1854 /*
1855  * usbvision_frames_alloc
1856  * allocate the maximum frames this driver can manage
1857  */
1858 int usbvision_frames_alloc(struct usb_usbvision *usbvision)
1859 {
1860         int i;
1861
1862         /* Allocate memory for the frame buffers */
1863         usbvision->max_frame_size = MAX_FRAME_SIZE;
1864         usbvision->fbuf_size = USBVISION_NUMFRAMES * usbvision->max_frame_size;
1865         usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size);
1866
1867         if(usbvision->fbuf == NULL) {
1868                 err("%s: unable to allocate %d bytes for fbuf ",
1869                     __FUNCTION__, usbvision->fbuf_size);
1870                 return -ENOMEM;
1871         }
1872         spin_lock_init(&usbvision->queue_lock);
1873         init_waitqueue_head(&usbvision->wait_frame);
1874         init_waitqueue_head(&usbvision->wait_stream);
1875
1876         /* Allocate all buffers */
1877         for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1878                 usbvision->frame[i].index = i;
1879                 usbvision->frame[i].grabstate = FrameState_Unused;
1880                 usbvision->frame[i].data = usbvision->fbuf +
1881                         i * usbvision->max_frame_size;
1882                 /*
1883                  * Set default sizes for read operation.
1884                  */
1885                 usbvision->stretch_width = 1;
1886                 usbvision->stretch_height = 1;
1887                 usbvision->frame[i].width = usbvision->curwidth;
1888                 usbvision->frame[i].height = usbvision->curheight;
1889                 usbvision->frame[i].bytes_read = 0;
1890         }
1891         return 0;
1892 }
1893
1894 /*
1895  * usbvision_frames_free
1896  * frees memory allocated for the frames
1897  */
1898 void usbvision_frames_free(struct usb_usbvision *usbvision)
1899 {
1900         /* Have to free all that memory */
1901         if (usbvision->fbuf != NULL) {
1902                 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1903                 usbvision->fbuf = NULL;
1904         }
1905 }
1906 /*
1907  * usbvision_empty_framequeues()
1908  * prepare queues for incoming and outgoing frames
1909  */
1910 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1911 {
1912         u32 i;
1913
1914         INIT_LIST_HEAD(&(usbvision->inqueue));
1915         INIT_LIST_HEAD(&(usbvision->outqueue));
1916
1917         for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1918                 usbvision->frame[i].grabstate = FrameState_Unused;
1919                 usbvision->frame[i].bytes_read = 0;
1920         }
1921 }
1922
1923 /*
1924  * usbvision_stream_interrupt()
1925  * stops streaming
1926  */
1927 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1928 {
1929         int ret = 0;
1930
1931         /* stop reading from the device */
1932
1933         usbvision->streaming = Stream_Interrupt;
1934         ret = wait_event_timeout(usbvision->wait_stream,
1935                                  (usbvision->streaming == Stream_Idle),
1936                                  msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1937         return ret;
1938 }
1939
1940 /*
1941  * usbvision_set_compress_params()
1942  *
1943  */
1944
1945 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
1946 {
1947         static const char proc[] = "usbvision_set_compresion_params: ";
1948         int rc;
1949         unsigned char value[6];
1950
1951         value[0] = 0x0F;    // Intra-Compression cycle
1952         value[1] = 0x01;    // Reg.45 one line per strip
1953         value[2] = 0x00;    // Reg.46 Force intra mode on all new frames
1954         value[3] = 0x00;    // Reg.47 FORCE_UP <- 0 normal operation (not force)
1955         value[4] = 0xA2;    // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode.
1956         value[5] = 0x00;    // Reg.49 DVI_YUV This has nothing to do with compression
1957
1958         //catched values for NT1004
1959         // value[0] = 0xFF; // Never apply intra mode automatically
1960         // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip
1961         // value[2] = 0x01; // Force intra mode on all new frames
1962         // value[3] = 0x00; // Strip size 400 Bytes; do not force up
1963         // value[4] = 0xA2; //
1964         if (!USBVISION_IS_OPERATIONAL(usbvision))
1965                 return 0;
1966
1967         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1968                              USBVISION_OP_CODE,
1969                              USB_DIR_OUT | USB_TYPE_VENDOR |
1970                              USB_RECIP_ENDPOINT, 0,
1971                              (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
1972
1973         if (rc < 0) {
1974                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
1975                        "reconnect or reload driver.\n", proc, rc);
1976                 return rc;
1977         }
1978
1979         if (usbvision->bridgeType == BRIDGE_NT1004) {
1980                 value[0] =  20; // PCM Threshold 1
1981                 value[1] =  12; // PCM Threshold 2
1982                 value[2] = 255; // Distorsion Threshold inter
1983                 value[3] = 255; // Distorsion Threshold intra
1984                 value[4] =  43; // Max Distorsion inter
1985                 value[5] =  43; // Max Distorsion intra
1986         }
1987         else {
1988                 value[0] =  20; // PCM Threshold 1
1989                 value[1] =  12; // PCM Threshold 2
1990                 value[2] = 255; // Distorsion Threshold d7-d0
1991                 value[3] =   0; // Distorsion Threshold d11-d8
1992                 value[4] =  43; // Max Distorsion d7-d0
1993                 value[5] =   0; // Max Distorsion d8
1994         }
1995
1996         if (!USBVISION_IS_OPERATIONAL(usbvision))
1997                 return 0;
1998
1999         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2000                              USBVISION_OP_CODE,
2001                              USB_DIR_OUT | USB_TYPE_VENDOR |
2002                              USB_RECIP_ENDPOINT, 0,
2003                              (__u16) USBVISION_PCM_THR1, value, 6, HZ);
2004
2005         if (rc < 0) {
2006                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2007                        "reconnect or reload driver.\n", proc, rc);
2008                 return rc;
2009         }
2010
2011
2012         return rc;
2013 }
2014
2015
2016 /*
2017  * usbvision_set_input()
2018  *
2019  * Set the input (saa711x, ...) size x y and other misc input params
2020  * I've no idea if this parameters are right
2021  *
2022  */
2023 int usbvision_set_input(struct usb_usbvision *usbvision)
2024 {
2025         static const char proc[] = "usbvision_set_input: ";
2026         int rc;
2027         unsigned char value[8];
2028         unsigned char dvi_yuv_value;
2029
2030         if (!USBVISION_IS_OPERATIONAL(usbvision))
2031                 return 0;
2032
2033         /* Set input format expected from decoder*/
2034         if (usbvision_device_data[usbvision->DevModel].Vin_Reg1 >= 0) {
2035                 value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1 & 0xff;
2036         } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2037                 /* SAA7113 uses 8 bit output */
2038                 value[0] = USBVISION_8_422_SYNC;
2039         } else {
2040                 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
2041                  * as that is how saa7111 is configured */
2042                 value[0] = USBVISION_16_422_SYNC;
2043                 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
2044         }
2045
2046         rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
2047         if (rc < 0) {
2048                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2049                        "reconnect or reload driver.\n", proc, rc);
2050                 return rc;
2051         }
2052
2053
2054         if (usbvision->tvnorm->id & V4L2_STD_PAL) {
2055                 value[0] = 0xC0;
2056                 value[1] = 0x02;        //0x02C0 -> 704 Input video line length
2057                 value[2] = 0x20;
2058                 value[3] = 0x01;        //0x0120 -> 288 Input video n. of lines
2059                 value[4] = 0x60;
2060                 value[5] = 0x00;        //0x0060 -> 96 Input video h offset
2061                 value[6] = 0x16;
2062                 value[7] = 0x00;        //0x0016 -> 22 Input video v offset
2063         } else if (usbvision->tvnorm->id & V4L2_STD_SECAM) {
2064                 value[0] = 0xC0;
2065                 value[1] = 0x02;        //0x02C0 -> 704 Input video line length
2066                 value[2] = 0x20;
2067                 value[3] = 0x01;        //0x0120 -> 288 Input video n. of lines
2068                 value[4] = 0x01;
2069                 value[5] = 0x00;        //0x0001 -> 01 Input video h offset
2070                 value[6] = 0x01;
2071                 value[7] = 0x00;        //0x0001 -> 01 Input video v offset
2072         } else {        /* V4L2_STD_NTSC */
2073                 value[0] = 0xD0;
2074                 value[1] = 0x02;        //0x02D0 -> 720 Input video line length
2075                 value[2] = 0xF0;
2076                 value[3] = 0x00;        //0x00F0 -> 240 Input video number of lines
2077                 value[4] = 0x50;
2078                 value[5] = 0x00;        //0x0050 -> 80 Input video h offset
2079                 value[6] = 0x10;
2080                 value[7] = 0x00;        //0x0010 -> 16 Input video v offset
2081         }
2082
2083         if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) {
2084                 value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff;
2085                 value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8;
2086         }
2087
2088         if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) {
2089                 value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff;
2090                 value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8;
2091         }
2092
2093         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2094                              USBVISION_OP_CODE, /* USBVISION specific code */
2095                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2096                              (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2097         if (rc < 0) {
2098                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2099                        "reconnect or reload driver.\n", proc, rc);
2100                 return rc;
2101         }
2102
2103
2104         dvi_yuv_value = 0x00;   /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2105
2106         if(usbvision_device_data[usbvision->DevModel].Dvi_yuv >= 0){
2107                 dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv & 0xff;
2108         }
2109         else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2110         /* This changes as the fine sync control changes. Further investigation necessary */
2111                 dvi_yuv_value = 0x06;
2112         }
2113
2114         return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value));
2115 }
2116
2117
2118 /*
2119  * usbvision_set_dram_settings()
2120  *
2121  * Set the buffer address needed by the usbvision dram to operate
2122  * This values has been taken with usbsnoop.
2123  *
2124  */
2125
2126 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2127 {
2128         int rc;
2129         unsigned char value[8];
2130
2131         if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2132                 value[0] = 0x42;
2133                 value[1] = 0x71;
2134                 value[2] = 0xff;
2135                 value[3] = 0x00;
2136                 value[4] = 0x98;
2137                 value[5] = 0xe0;
2138                 value[6] = 0x71;
2139                 value[7] = 0xff;
2140                 // UR:  0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte)
2141                 // FDL: 0x00000-0x0E099 =  57498 Words
2142                 // VDW: 0x0E3FF-0x3FFFF
2143         }
2144         else {
2145                 value[0] = 0x42;
2146                 value[1] = 0x00;
2147                 value[2] = 0xff;
2148                 value[3] = 0x00;
2149                 value[4] = 0x00;
2150                 value[5] = 0x00;
2151                 value[6] = 0x00;
2152                 value[7] = 0xff;
2153         }
2154         /* These are the values of the address of the video buffer,
2155          * they have to be loaded into the USBVISION_DRM_PRM1-8
2156          *
2157          * Start address of video output buffer for read:       drm_prm1-2 -> 0x00000
2158          * End address of video output buffer for read:         drm_prm1-3 -> 0x1ffff
2159          * Start address of video frame delay buffer:           drm_prm1-4 -> 0x20000
2160          *    Only used in compressed mode
2161          * End address of video frame delay buffer:             drm_prm1-5-6 -> 0x3ffff
2162          *    Only used in compressed mode
2163          * Start address of video output buffer for write:      drm_prm1-7 -> 0x00000
2164          * End address of video output buffer for write:        drm_prm1-8 -> 0x1ffff
2165          */
2166
2167         if (!USBVISION_IS_OPERATIONAL(usbvision))
2168                 return 0;
2169
2170         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2171                              USBVISION_OP_CODE, /* USBVISION specific code */
2172                              USB_DIR_OUT | USB_TYPE_VENDOR |
2173                              USB_RECIP_ENDPOINT, 0,
2174                              (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2175
2176         if (rc < 0) {
2177                 err("%sERROR=%d", __FUNCTION__, rc);
2178                 return rc;
2179         }
2180
2181         /* Restart the video buffer logic */
2182         if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2183                                    USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0)
2184                 return rc;
2185         rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2186
2187         return rc;
2188 }
2189
2190 /*
2191  * ()
2192  *
2193  * Power on the device, enables suspend-resume logic
2194  * &  reset the isoc End-Point
2195  *
2196  */
2197
2198 int usbvision_power_on(struct usb_usbvision *usbvision)
2199 {
2200         int errCode = 0;
2201
2202         PDEBUG(DBG_FUNC, "");
2203
2204         usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2205         usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2206                          USBVISION_SSPND_EN | USBVISION_RES2);
2207
2208         usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2209                          USBVISION_SSPND_EN | USBVISION_PWR_VID);
2210         errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2211                                                 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2212         if (errCode == 1) {
2213                 usbvision->power = 1;
2214         }
2215         PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode);
2216         return errCode;
2217 }
2218
2219
2220 /*
2221  * usbvision timer stuff
2222  */
2223
2224 // to call usbvision_power_off from task queue
2225 static void call_usbvision_power_off(struct work_struct *work)
2226 {
2227         struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork);
2228
2229         PDEBUG(DBG_FUNC, "");
2230         down_interruptible(&usbvision->lock);
2231         if(usbvision->user == 0) {
2232                 usbvision_i2c_usb_del_bus(&usbvision->i2c_adap);
2233
2234                 usbvision_power_off(usbvision);
2235                 usbvision->initialized = 0;
2236         }
2237         up(&usbvision->lock);
2238 }
2239
2240 static void usbvision_powerOffTimer(unsigned long data)
2241 {
2242         struct usb_usbvision *usbvision = (void *) data;
2243
2244         PDEBUG(DBG_FUNC, "");
2245         del_timer(&usbvision->powerOffTimer);
2246         INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off);
2247         (void) schedule_work(&usbvision->powerOffWork);
2248
2249 }
2250
2251 void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision)
2252 {
2253         init_timer(&usbvision->powerOffTimer);
2254         usbvision->powerOffTimer.data = (long) usbvision;
2255         usbvision->powerOffTimer.function = usbvision_powerOffTimer;
2256 }
2257
2258 void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision)
2259 {
2260         mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME);
2261 }
2262
2263 void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision)
2264 {
2265         if (timer_pending(&usbvision->powerOffTimer)) {
2266                 del_timer(&usbvision->powerOffTimer);
2267         }
2268 }
2269
2270 /*
2271  * usbvision_begin_streaming()
2272  * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2273  * idea about the rest
2274  */
2275 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2276 {
2277         int errCode = 0;
2278
2279         if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2280                 usbvision_init_compression(usbvision);
2281         }
2282         errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID |
2283                                                                                 usbvision->Vin_Reg2_Preset);
2284         return errCode;
2285 }
2286
2287 /*
2288  * usbvision_restart_isoc()
2289  * Not sure yet if touching here PWR_REG make loose the config
2290  */
2291
2292 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2293 {
2294         int ret;
2295
2296         if (
2297             (ret =
2298              usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2299                               USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0)
2300                 return ret;
2301         if (
2302             (ret =
2303              usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2304                               USBVISION_SSPND_EN | USBVISION_PWR_VID |
2305                               USBVISION_RES2)) < 0)
2306                 return ret;
2307         if (
2308             (ret =
2309              usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2310                               USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2311                                   usbvision->Vin_Reg2_Preset)) < 0) return ret;
2312
2313         /* TODO: schedule timeout */
2314         while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1);
2315
2316         return 0;
2317 }
2318
2319 int usbvision_audio_off(struct usb_usbvision *usbvision)
2320 {
2321         if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2322                 printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n");
2323                 return -1;
2324         }
2325         usbvision->AudioMute = 0;
2326         usbvision->AudioChannel = USBVISION_AUDIO_MUTE;
2327         return 0;
2328 }
2329
2330 int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel)
2331 {
2332         if (!usbvision->AudioMute) {
2333                 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) {
2334                         printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2335                         return -1;
2336                 }
2337         }
2338         usbvision->AudioChannel = AudioChannel;
2339         return 0;
2340 }
2341
2342 int usbvision_setup(struct usb_usbvision *usbvision,int format)
2343 {
2344         usbvision_set_video_format(usbvision, format);
2345         usbvision_set_dram_settings(usbvision);
2346         usbvision_set_compress_params(usbvision);
2347         usbvision_set_input(usbvision);
2348         usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2349         usbvision_restart_isoc(usbvision);
2350
2351         /* cosas del PCM */
2352         return USBVISION_IS_OPERATIONAL(usbvision);
2353 }
2354
2355 /*
2356  * usbvision_init_isoc()
2357  *
2358  */
2359 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2360 {
2361         struct usb_device *dev = usbvision->dev;
2362         int bufIdx, errCode, regValue;
2363         const int sb_size = USBVISION_URB_FRAMES * USBVISION_MAX_ISOC_PACKET_SIZE;
2364
2365         if (!USBVISION_IS_OPERATIONAL(usbvision))
2366                 return -EFAULT;
2367
2368         usbvision->curFrame = NULL;
2369         scratch_reset(usbvision);
2370
2371         /* Alternate interface 1 is is the biggest frame size */
2372         errCode = usb_set_interface(dev, usbvision->iface, usbvision->ifaceAltActive);
2373         if (errCode < 0) {
2374                 usbvision->last_error = errCode;
2375                 return -EBUSY;
2376         }
2377
2378         regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2379         usbvision->isocPacketSize = (regValue == 0) ? 0 : (regValue * 64) - 1;
2380         PDEBUG(DBG_ISOC, "ISO Packet Length:%d", usbvision->isocPacketSize);
2381
2382         usbvision->usb_bandwidth = regValue >> 1;
2383         PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth);
2384
2385
2386
2387         /* We double buffer the Iso lists */
2388
2389         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2390                 int j, k;
2391                 struct urb *urb;
2392
2393                 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2394                 if (urb == NULL) {
2395                         err("%s: usb_alloc_urb() failed", __FUNCTION__);
2396                         return -ENOMEM;
2397                 }
2398                 usbvision->sbuf[bufIdx].urb = urb;
2399                 usbvision->sbuf[bufIdx].data = usb_buffer_alloc(usbvision->dev, sb_size, GFP_KERNEL,&urb->transfer_dma);
2400                 urb->dev = dev;
2401                 urb->context = usbvision;
2402                 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2403                 urb->transfer_flags = URB_ISO_ASAP;
2404                 urb->interval = 1;
2405                 urb->transfer_buffer = usbvision->sbuf[bufIdx].data;
2406                 urb->complete = usbvision_isocIrq;
2407                 urb->number_of_packets = USBVISION_URB_FRAMES;
2408                 urb->transfer_buffer_length =
2409                     usbvision->isocPacketSize * USBVISION_URB_FRAMES;
2410                 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2411                      k += usbvision->isocPacketSize) {
2412                         urb->iso_frame_desc[j].offset = k;
2413                         urb->iso_frame_desc[j].length = usbvision->isocPacketSize;
2414                 }
2415         }
2416
2417
2418         /* Submit all URBs */
2419         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2420                         errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb, GFP_KERNEL);
2421                 if (errCode) {
2422                         err("%s: usb_submit_urb(%d) failed: error %d", __FUNCTION__, bufIdx, errCode);
2423                 }
2424         }
2425
2426         usbvision->streaming = Stream_Idle;
2427         PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x", __FUNCTION__, usbvision->video_endp);
2428         return 0;
2429 }
2430
2431 /*
2432  * usbvision_stop_isoc()
2433  *
2434  * This procedure stops streaming and deallocates URBs. Then it
2435  * activates zero-bandwidth alt. setting of the video interface.
2436  *
2437  */
2438 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2439 {
2440         int bufIdx, errCode, regValue;
2441         const int sb_size = USBVISION_URB_FRAMES * USBVISION_MAX_ISOC_PACKET_SIZE;
2442
2443         if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL))
2444                 return;
2445
2446         /* Unschedule all of the iso td's */
2447         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2448                 usb_kill_urb(usbvision->sbuf[bufIdx].urb);
2449                 if (usbvision->sbuf[bufIdx].data){
2450                         usb_buffer_free(usbvision->dev,
2451                                         sb_size,
2452                                         usbvision->sbuf[bufIdx].data,
2453                                         usbvision->sbuf[bufIdx].urb->transfer_dma);
2454                 }
2455                 usb_free_urb(usbvision->sbuf[bufIdx].urb);
2456                 usbvision->sbuf[bufIdx].urb = NULL;
2457         }
2458
2459
2460         PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __FUNCTION__);
2461         usbvision->streaming = Stream_Off;
2462
2463         if (!usbvision->remove_pending) {
2464
2465                 /* Set packet size to 0 */
2466                 errCode = usb_set_interface(usbvision->dev, usbvision->iface,
2467                                       usbvision->ifaceAltInactive);
2468                 if (errCode < 0) {
2469                         err("%s: usb_set_interface() failed: error %d", __FUNCTION__, errCode);
2470                         usbvision->last_error = errCode;
2471                 }
2472                 regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2473                 usbvision->isocPacketSize = (regValue == 0) ? 0 : (regValue * 64) - 1;
2474                 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", usbvision->isocPacketSize);
2475
2476                 usbvision->usb_bandwidth = regValue >> 1;
2477                 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth);
2478         }
2479 }
2480
2481 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2482 {
2483         int mode[4];
2484         int audio[]= {1, 0, 0, 0};
2485         struct v4l2_routing route;
2486         //channel 0 is TV with audiochannel 1 (tuner mono)
2487         //channel 1 is Composite with audio channel 0 (line in)
2488         //channel 2 is S-Video with audio channel 0 (line in)
2489         //channel 3 is additional video inputs to the device with audio channel 0 (line in)
2490
2491         RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2492         usbvision->ctl_input = channel;
2493           route.input = SAA7115_COMPOSITE1;
2494           call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
2495           call_i2c_clients(usbvision, VIDIOC_S_INPUT, &usbvision->ctl_input);
2496
2497         // set the new channel
2498         // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video
2499         // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red
2500
2501         switch (usbvision_device_data[usbvision->DevModel].Codec) {
2502                 case CODEC_SAA7113:
2503                         if (SwitchSVideoInput) { // To handle problems with S-Video Input for some devices.  Use SwitchSVideoInput parameter when loading the module.
2504                                 mode[2] = 1;
2505                         }
2506                         else {
2507                                 mode[2] = 7;
2508                         }
2509                         if (usbvision_device_data[usbvision->DevModel].VideoChannels == 4) {
2510                                 mode[0] = 0; mode[1] = 2; mode[3] = 3;  // Special for four input devices
2511                         }
2512                         else {
2513                                 mode[0] = 0; mode[1] = 2; //modes for regular saa7113 devices
2514                         }
2515                         break;
2516                 case CODEC_SAA7111:
2517                         mode[0] = 0; mode[1] = 1; mode[2] = 7; //modes for saa7111
2518                         break;
2519                 default:
2520                         mode[0] = 0; mode[1] = 1; mode[2] = 7; //default modes
2521         }
2522         route.input = mode[channel];
2523         call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
2524         usbvision->channel = channel;
2525         usbvision_set_audio(usbvision, audio[channel]);
2526         return 0;
2527 }
2528
2529 /*
2530  * Overrides for Emacs so that we follow Linus's tabbing style.
2531  * ---------------------------------------------------------------------------
2532  * Local variables:
2533  * c-basic-offset: 8
2534  * End:
2535  */