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/list.h>
  28 #include <linux/timer.h>
  29 #include <linux/slab.h>
  30 #include <linux/mm.h>
  31 #include <linux/utsname.h>
  32 #include <linux/highmem.h>
  33 #include <linux/videodev.h>
  34 #include <linux/vmalloc.h>
  35 #include <linux/module.h>
  36 #include <linux/init.h>
  37 #include <linux/spinlock.h>
  38 #include <asm/io.h>
  39 #include <linux/videodev2.h>
  40 #include <linux/video_decoder.h>
  41 #include <linux/i2c.h>
  42
  43 #include <media/saa7115.h>
  44 #include <media/v4l2-common.h>
  45 #include <media/tuner.h>
  46 #include <media/audiochip.h>
  47
  48 #include <linux/workqueue.h>
  49
  50 #ifdef CONFIG_KMOD
  51 #include <linux/kmod.h>
  52 #endif
  53
  54 #include "usbvision.h"
  55
  56 static unsigned int core_debug;
  57 module_param(core_debug,int,0644);
  58 MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
  59
  60 static unsigned int force_testpattern;
  61 module_param(force_testpattern,int,0644);
  62 MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]");
  63
  64 static int adjustCompression = 1;       /* Set the compression to be adaptive */
  65 module_param(adjustCompression, int, 0444);
  66 MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device.  Default: 1 (On)");
  67
  68 /* To help people with Black and White output with using s-video input.
  69  * Some cables and input device are wired differently. */
  70 static int SwitchSVideoInput;
  71 module_param(SwitchSVideoInput, int, 0444);
  72 MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input.  Some cables and input device are wired differently. Default: 0 (Off)");
  73
  74 static unsigned int adjust_X_Offset = -1;
  75 module_param(adjust_X_Offset, int, 0644);
  76 MODULE_PARM_DESC(adjust_X_Offset, "adjust X offset display [core]");
  77
  78 static unsigned int adjust_Y_Offset = -1;
  79 module_param(adjust_Y_Offset, int, 0644);
  80 MODULE_PARM_DESC(adjust_Y_Offset, "adjust Y offset display [core]");
  81
  82
  83 #define ENABLE_HEXDUMP  0       /* Enable if you need it */
  84
  85
  86 #ifdef USBVISION_DEBUG
  87         #define PDEBUG(level, fmt, args...) { \
  88                 if (core_debug & (level)) \
  89                         info("[%s:%d] " fmt, __func__, __LINE__ , ## args); \
  90         }
  91 #else
  92         #define PDEBUG(level, fmt, args...) do {} while(0)
  93 #endif
  94
  95 #define DBG_HEADER      1<<0
  96 #define DBG_IRQ         1<<1
  97 #define DBG_ISOC        1<<2
  98 #define DBG_PARSE       1<<3
  99 #define DBG_SCRATCH     1<<4
 100 #define DBG_FUNC        1<<5
 101
 102 static const int max_imgwidth = MAX_FRAME_WIDTH;
 103 static const int max_imgheight = MAX_FRAME_HEIGHT;
 104 static const int min_imgwidth = MIN_FRAME_WIDTH;
 105 static const int min_imgheight = MIN_FRAME_HEIGHT;
 106
 107 /* The value of 'scratch_buf_size' affects quality of the picture
 108  * in many ways. Shorter buffers may cause loss of data when client
 109  * is too slow. Larger buffers are memory-consuming and take longer
 110  * to work with. This setting can be adjusted, but the default value
 111  * should be OK for most desktop users.
 112  */
 113 #define DEFAULT_SCRATCH_BUF_SIZE        (0x20000)               // 128kB memory scratch buffer
 114 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
 115
 116 // Function prototypes
 117 static int usbvision_request_intra (struct usb_usbvision *usbvision);
 118 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision);
 119 static int usbvision_adjust_compression (struct usb_usbvision *usbvision);
 120 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision);
 121
 122 /*******************************/
 123 /* Memory management functions */
 124 /*******************************/
 125
 126 /*
 127  * Here we want the physical address of the memory.
 128  * This is used when initializing the contents of the area.
 129  */
 130
 131 static void *usbvision_rvmalloc(unsigned long size)
 132 {
 133         void *mem;
 134         unsigned long adr;
 135
 136         size = PAGE_ALIGN(size);
 137         mem = vmalloc_32(size);
 138         if (!mem)
 139                 return NULL;
 140
 141         memset(mem, 0, size); /* Clear the ram out, no junk to the user */
 142         adr = (unsigned long) mem;
 143         while (size > 0) {
 144                 SetPageReserved(vmalloc_to_page((void *)adr));
 145                 adr += PAGE_SIZE;
 146                 size -= PAGE_SIZE;
 147         }
 148
 149         return mem;
 150 }
 151
 152 static void usbvision_rvfree(void *mem, unsigned long size)
 153 {
 154         unsigned long adr;
 155
 156         if (!mem)
 157                 return;
 158
 159         size = PAGE_ALIGN(size);
 160
 161         adr = (unsigned long) mem;
 162         while ((long) size > 0) {
 163                 ClearPageReserved(vmalloc_to_page((void *)adr));
 164                 adr += PAGE_SIZE;
 165                 size -= PAGE_SIZE;
 166         }
 167
 168         vfree(mem);
 169 }
 170
 171
 172 #if ENABLE_HEXDUMP
 173 static void usbvision_hexdump(const unsigned char *data, int len)
 174 {
 175         char tmp[80];
 176         int i, k;
 177
 178         for (i = k = 0; len > 0; i++, len--) {
 179                 if (i > 0 && (i % 16 == 0)) {
 180                         printk("%s\n", tmp);
 181                         k = 0;
 182                 }
 183                 k += sprintf(&tmp[k], "%02x ", data[i]);
 184         }
 185         if (k > 0)
 186                 printk("%s\n", tmp);
 187 }
 188 #endif
 189
 190 /********************************
 191  * scratch ring buffer handling
 192  ********************************/
 193 static int scratch_len(struct usb_usbvision *usbvision)    /*This returns the amount of data actually in the buffer */
 194 {
 195         int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
 196         if (len < 0) {
 197                 len += scratch_buf_size;
 198         }
 199         PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
 200
 201         return len;
 202 }
 203
 204
 205 /* This returns the free space left in the buffer */
 206 static int scratch_free(struct usb_usbvision *usbvision)
 207 {
 208         int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
 209         if (free <= 0) {
 210                 free += scratch_buf_size;
 211         }
 212         if (free) {
 213                 free -= 1;                                                      /* at least one byte in the buffer must */
 214                                                                                 /* left blank, otherwise there is no chance to differ between full and empty */
 215         }
 216         PDEBUG(DBG_SCRATCH, "return %d\n", free);
 217
 218         return free;
 219 }
 220
 221
 222 /* This puts data into the buffer */
 223 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
 224                        int len)
 225 {
 226         int len_part;
 227
 228         if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
 229                 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
 230                 usbvision->scratch_write_ptr += len;
 231         }
 232         else {
 233                 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
 234                 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
 235                 if (len == len_part) {
 236                         usbvision->scratch_write_ptr = 0;                       /* just set write_ptr to zero */
 237                 }
 238                 else {
 239                         memcpy(usbvision->scratch, data + len_part, len - len_part);
 240                         usbvision->scratch_write_ptr = len - len_part;
 241                 }
 242         }
 243
 244         PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
 245
 246         return len;
 247 }
 248
 249 /* This marks the write_ptr as position of new frame header */
 250 static void scratch_mark_header(struct usb_usbvision *usbvision)
 251 {
 252         PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
 253
 254         usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
 255                                 usbvision->scratch_write_ptr;
 256         usbvision->scratch_headermarker_write_ptr += 1;
 257         usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
 258 }
 259
 260 /* This gets data from the buffer at the given "ptr" position */
 261 static int scratch_get_extra(struct usb_usbvision *usbvision,
 262                              unsigned char *data, int *ptr, int len)
 263 {
 264         int len_part;
 265         if (*ptr + len < scratch_buf_size) {
 266                 memcpy(data, usbvision->scratch + *ptr, len);
 267                 *ptr += len;
 268         }
 269         else {
 270                 len_part = scratch_buf_size - *ptr;
 271                 memcpy(data, usbvision->scratch + *ptr, len_part);
 272                 if (len == len_part) {
 273                         *ptr = 0;                                                       /* just set the y_ptr to zero */
 274                 }
 275                 else {
 276                         memcpy(data + len_part, usbvision->scratch, len - len_part);
 277                         *ptr = len - len_part;
 278                 }
 279         }
 280
 281         PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
 282
 283         return len;
 284 }
 285
 286
 287 /* This sets the scratch extra read pointer */
 288 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
 289                                   int len)
 290 {
 291         *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size;
 292
 293         PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
 294 }
 295
 296
 297 /*This increments the scratch extra read pointer */
 298 static void scratch_inc_extra_ptr(int *ptr, int len)
 299 {
 300         *ptr = (*ptr + len) % scratch_buf_size;
 301
 302         PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
 303 }
 304
 305
 306 /* This gets data from the buffer */
 307 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
 308                        int len)
 309 {
 310         int len_part;
 311         if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
 312                 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
 313                 usbvision->scratch_read_ptr += len;
 314         }
 315         else {
 316                 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
 317                 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
 318                 if (len == len_part) {
 319                         usbvision->scratch_read_ptr = 0;                                /* just set the read_ptr to zero */
 320                 }
 321                 else {
 322                         memcpy(data + len_part, usbvision->scratch, len - len_part);
 323                         usbvision->scratch_read_ptr = len - len_part;
 324                 }
 325         }
 326
 327         PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
 328
 329         return len;
 330 }
 331
 332
 333 /* This sets read pointer to next header and returns it */
 334 static int scratch_get_header(struct usb_usbvision *usbvision,
 335                               struct usbvision_frame_header *header)
 336 {
 337         int errCode = 0;
 338
 339         PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
 340
 341         while (usbvision->scratch_headermarker_write_ptr -
 342                 usbvision->scratch_headermarker_read_ptr != 0) {
 343                 usbvision->scratch_read_ptr =
 344                         usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
 345                 usbvision->scratch_headermarker_read_ptr += 1;
 346                 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
 347                 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
 348                 if ((header->magic_1 == USBVISION_MAGIC_1)
 349                          && (header->magic_2 == USBVISION_MAGIC_2)
 350                          && (header->headerLength == USBVISION_HEADER_LENGTH)) {
 351                         errCode = USBVISION_HEADER_LENGTH;
 352                         header->frameWidth  = header->frameWidthLo  + (header->frameWidthHi << 8);
 353                         header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8);
 354                         break;
 355                 }
 356         }
 357
 358         return errCode;
 359 }
 360
 361
 362 /*This removes len bytes of old data from the buffer */
 363 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
 364 {
 365
 366         usbvision->scratch_read_ptr += len;
 367         usbvision->scratch_read_ptr %= scratch_buf_size;
 368         PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
 369 }
 370
 371
 372 /*This resets the buffer - kills all data in it too */
 373 static void scratch_reset(struct usb_usbvision *usbvision)
 374 {
 375         PDEBUG(DBG_SCRATCH, "\n");
 376
 377         usbvision->scratch_read_ptr = 0;
 378         usbvision->scratch_write_ptr = 0;
 379         usbvision->scratch_headermarker_read_ptr = 0;
 380         usbvision->scratch_headermarker_write_ptr = 0;
 381         usbvision->isocstate = IsocState_NoFrame;
 382 }
 383
 384 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
 385 {
 386         usbvision->scratch = vmalloc_32(scratch_buf_size);
 387         scratch_reset(usbvision);
 388         if(usbvision->scratch == NULL) {
 389                 err("%s: unable to allocate %d bytes for scratch",
 390                     __func__, scratch_buf_size);
 391                 return -ENOMEM;
 392         }
 393         return 0;
 394 }
 395
 396 void usbvision_scratch_free(struct usb_usbvision *usbvision)
 397 {
 398         if (usbvision->scratch != NULL) {
 399                 vfree(usbvision->scratch);
 400                 usbvision->scratch = NULL;
 401         }
 402 }
 403
 404 /*
 405  * usbvision_testpattern()
 406  *
 407  * Procedure forms a test pattern (yellow grid on blue background).
 408  *
 409  * Parameters:
 410  * fullframe:   if TRUE then entire frame is filled, otherwise the procedure
 411  *              continues from the current scanline.
 412  * pmode        0: fill the frame with solid blue color (like on VCR or TV)
 413  *              1: Draw a colored grid
 414  *
 415  */
 416 static void usbvision_testpattern(struct usb_usbvision *usbvision,
 417                                   int fullframe, int pmode)
 418 {
 419         static const char proc[] = "usbvision_testpattern";
 420         struct usbvision_frame *frame;
 421         unsigned char *f;
 422         int num_cell = 0;
 423         int scan_length = 0;
 424         static int num_pass;
 425
 426         if (usbvision == NULL) {
 427                 printk(KERN_ERR "%s: usbvision == NULL\n", proc);
 428                 return;
 429         }
 430         if (usbvision->curFrame == NULL) {
 431                 printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc);
 432                 return;
 433         }
 434
 435         /* Grab the current frame */
 436         frame = usbvision->curFrame;
 437
 438         /* Optionally start at the beginning */
 439         if (fullframe) {
 440                 frame->curline = 0;
 441                 frame->scanlength = 0;
 442         }
 443
 444         /* Form every scan line */
 445         for (; frame->curline < frame->frmheight; frame->curline++) {
 446                 int i;
 447
 448                 f = frame->data + (usbvision->curwidth * 3 * frame->curline);
 449                 for (i = 0; i < usbvision->curwidth; i++) {
 450                         unsigned char cb = 0x80;
 451                         unsigned char cg = 0;
 452                         unsigned char cr = 0;
 453
 454                         if (pmode == 1) {
 455                                 if (frame->curline % 32 == 0)
 456                                         cb = 0, cg = cr = 0xFF;
 457                                 else if (i % 32 == 0) {
 458                                         if (frame->curline % 32 == 1)
 459                                                 num_cell++;
 460                                         cb = 0, cg = cr = 0xFF;
 461                                 } else {
 462                                         cb =
 463                                             ((num_cell * 7) +
 464                                              num_pass) & 0xFF;
 465                                         cg =
 466                                             ((num_cell * 5) +
 467                                              num_pass * 2) & 0xFF;
 468                                         cr =
 469                                             ((num_cell * 3) +
 470                                              num_pass * 3) & 0xFF;
 471                                 }
 472                         } else {
 473                                 /* Just the blue screen */
 474                         }
 475
 476                         *f++ = cb;
 477                         *f++ = cg;
 478                         *f++ = cr;
 479                         scan_length += 3;
 480                 }
 481         }
 482
 483         frame->grabstate = FrameState_Done;
 484         frame->scanlength += scan_length;
 485         ++num_pass;
 486
 487 }
 488
 489 /*
 490  * usbvision_decompress_alloc()
 491  *
 492  * allocates intermediate buffer for decompression
 493  */
 494 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
 495 {
 496         int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
 497         usbvision->IntraFrameBuffer = vmalloc_32(IFB_size);
 498         if (usbvision->IntraFrameBuffer == NULL) {
 499                 err("%s: unable to allocate %d for compr. frame buffer",
 500                     __func__, IFB_size);
 501                 return -ENOMEM;
 502         }
 503         return 0;
 504 }
 505
 506 /*
 507  * usbvision_decompress_free()
 508  *
 509  * frees intermediate buffer for decompression
 510  */
 511 void usbvision_decompress_free(struct usb_usbvision *usbvision)
 512 {
 513         if (usbvision->IntraFrameBuffer != NULL) {
 514                 vfree(usbvision->IntraFrameBuffer);
 515                 usbvision->IntraFrameBuffer = NULL;
 516         }
 517 }
 518
 519 /************************************************************
 520  * Here comes the data parsing stuff that is run as interrupt
 521  ************************************************************/
 522 /*
 523  * usbvision_find_header()
 524  *
 525  * Locate one of supported header markers in the scratch buffer.
 526  */
 527 static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision)
 528 {
 529         struct usbvision_frame *frame;
 530         int foundHeader = 0;
 531
 532         frame = usbvision->curFrame;
 533
 534         while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) {
 535                 // found header in scratch
 536                 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
 537                                 frame->isocHeader.magic_2,
 538                                 frame->isocHeader.magic_1,
 539                                 frame->isocHeader.headerLength,
 540                                 frame->isocHeader.frameNum,
 541                                 frame->isocHeader.framePhase,
 542                                 frame->isocHeader.frameLatency,
 543                                 frame->isocHeader.dataFormat,
 544                                 frame->isocHeader.formatParam,
 545                                 frame->isocHeader.frameWidth,
 546                                 frame->isocHeader.frameHeight);
 547
 548                 if (usbvision->requestIntra) {
 549                         if (frame->isocHeader.formatParam & 0x80) {
 550                                 foundHeader = 1;
 551                                 usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time
 552                                 usbvision_unrequest_intra(usbvision);
 553                                 break;
 554                         }
 555                 }
 556                 else {
 557                         foundHeader = 1;
 558                         break;
 559                 }
 560         }
 561
 562         if (foundHeader) {
 563                 frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width;
 564                 frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height;
 565                 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3;
 566         }
 567         else { // no header found
 568                 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
 569                 scratch_reset(usbvision);
 570                 return ParseState_EndParse;
 571         }
 572
 573         // found header
 574         if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) {
 575                 //check isocHeader.frameNum for lost frames
 576                 if (usbvision->lastIsocFrameNum >= 0) {
 577                         if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) {
 578                                 // unexpected frame drop: need to request new intra frame
 579                                 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum);
 580                                 usbvision_request_intra(usbvision);
 581                                 return ParseState_NextFrame;
 582                         }
 583                 }
 584                 usbvision->lastIsocFrameNum = frame->isocHeader.frameNum;
 585         }
 586         usbvision->header_count++;
 587         frame->scanstate = ScanState_Lines;
 588         frame->curline = 0;
 589
 590         if (force_testpattern) {
 591                 usbvision_testpattern(usbvision, 1, 1);
 592                 return ParseState_NextFrame;
 593         }
 594         return ParseState_Continue;
 595 }
 596
 597 static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision,
 598                                            long *pcopylen)
 599 {
 600         volatile struct usbvision_frame *frame;
 601         unsigned char *f;
 602         int len;
 603         int i;
 604         unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components
 605         unsigned char rv, gv, bv;       // RGB components
 606         int clipmask_index, bytes_per_pixel;
 607         int stretch_bytes, clipmask_add;
 608
 609         frame  = usbvision->curFrame;
 610         f = frame->data + (frame->v4l2_linesize * frame->curline);
 611
 612         /* Make sure there's enough data for the entire line */
 613         len = (frame->isocHeader.frameWidth * 2)+5;
 614         if (scratch_len(usbvision) < len) {
 615                 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
 616                 return ParseState_Out;
 617         }
 618
 619         if ((frame->curline + 1) >= frame->frmheight) {
 620                 return ParseState_NextFrame;
 621         }
 622
 623         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
 624         stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
 625         clipmask_index = frame->curline * MAX_FRAME_WIDTH;
 626         clipmask_add = usbvision->stretch_width;
 627
 628         for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) {
 629
 630                 scratch_get(usbvision, &yuyv[0], 4);
 631
 632                 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 633                         *f++ = yuyv[0]; // Y
 634                         *f++ = yuyv[3]; // U
 635                 }
 636                 else {
 637
 638                         YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
 639                         switch (frame->v4l2_format.format) {
 640                         case V4L2_PIX_FMT_RGB565:
 641                                 *f++ = (0x1F & rv) |
 642                                         (0xE0 & (gv << 5));
 643                                 *f++ = (0x07 & (gv >> 3)) |
 644                                         (0xF8 &  bv);
 645                                 break;
 646                         case V4L2_PIX_FMT_RGB24:
 647                                 *f++ = rv;
 648                                 *f++ = gv;
 649                                 *f++ = bv;
 650                                 break;
 651                         case V4L2_PIX_FMT_RGB32:
 652                                 *f++ = rv;
 653                                 *f++ = gv;
 654                                 *f++ = bv;
 655                                 f++;
 656                                 break;
 657                         case V4L2_PIX_FMT_RGB555:
 658                                 *f++ = (0x1F & rv) |
 659                                         (0xE0 & (gv << 5));
 660                                 *f++ = (0x03 & (gv >> 3)) |
 661                                         (0x7C & (bv << 2));
 662                                 break;
 663                         }
 664                 }
 665                 clipmask_index += clipmask_add;
 666                 f += stretch_bytes;
 667
 668                 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 669                         *f++ = yuyv[2]; // Y
 670                         *f++ = yuyv[1]; // V
 671                 }
 672                 else {
 673
 674                         YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
 675                         switch (frame->v4l2_format.format) {
 676                         case V4L2_PIX_FMT_RGB565:
 677                                 *f++ = (0x1F & rv) |
 678                                         (0xE0 & (gv << 5));
 679                                 *f++ = (0x07 & (gv >> 3)) |
 680                                         (0xF8 &  bv);
 681                                 break;
 682                         case V4L2_PIX_FMT_RGB24:
 683                                 *f++ = rv;
 684                                 *f++ = gv;
 685                                 *f++ = bv;
 686                                 break;
 687                         case V4L2_PIX_FMT_RGB32:
 688                                 *f++ = rv;
 689                                 *f++ = gv;
 690                                 *f++ = bv;
 691                                 f++;
 692                                 break;
 693                         case V4L2_PIX_FMT_RGB555:
 694                                 *f++ = (0x1F & rv) |
 695                                         (0xE0 & (gv << 5));
 696                                 *f++ = (0x03 & (gv >> 3)) |
 697                                         (0x7C & (bv << 2));
 698                                 break;
 699                         }
 700                 }
 701                 clipmask_index += clipmask_add;
 702                 f += stretch_bytes;
 703         }
 704
 705         frame->curline += usbvision->stretch_height;
 706         *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
 707
 708         if (frame->curline >= frame->frmheight) {
 709                 return ParseState_NextFrame;
 710         }
 711         else {
 712                 return ParseState_Continue;
 713         }
 714 }
 715
 716 /* The decompression routine  */
 717 static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed,
 718                                                                 unsigned char *Decompressed, int *StartPos,
 719                                                                 int *BlockTypeStartPos, int Len)
 720 {
 721         int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen;
 722         unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator;
 723
 724         Integrator = 0;
 725         Pos = *StartPos;
 726         BlockTypePos = *BlockTypeStartPos;
 727         MaxPos = 396; //Pos + Len;
 728         ExtraPos = Pos;
 729         BlockLen = 0;
 730         BlockByte = 0;
 731         BlockCode = 0;
 732         BlockType = 0;
 733         BlockTypeByte = 0;
 734         BlockTypeLen = 0;
 735         RestPixel = Len;
 736
 737         for (Idx = 0; Idx < Len; Idx++) {
 738
 739                 if (BlockLen == 0) {
 740                         if (BlockTypeLen==0) {
 741                                 BlockTypeByte = Compressed[BlockTypePos];
 742                                 BlockTypePos++;
 743                                 BlockTypeLen = 4;
 744                         }
 745                         BlockType = (BlockTypeByte & 0xC0) >> 6;
 746
 747                         //statistic:
 748                         usbvision->ComprBlockTypes[BlockType]++;
 749
 750                         Pos = ExtraPos;
 751                         if (BlockType == 0) {
 752                                 if(RestPixel >= 24) {
 753                                         Idx += 23;
 754                                         RestPixel -= 24;
 755                                         Integrator = Decompressed[Idx];
 756                                 } else {
 757                                         Idx += RestPixel - 1;
 758                                         RestPixel = 0;
 759                                 }
 760                         } else {
 761                                 BlockCode = Compressed[Pos];
 762                                 Pos++;
 763                                 if (RestPixel >= 24) {
 764                                         BlockLen  = 24;
 765                                 } else {
 766                                         BlockLen = RestPixel;
 767                                 }
 768                                 RestPixel -= BlockLen;
 769                                 ExtraPos = Pos + (BlockLen / 4);
 770                         }
 771                         BlockTypeByte <<= 2;
 772                         BlockTypeLen -= 1;
 773                 }
 774                 if (BlockLen > 0) {
 775                         if ((BlockLen%4) == 0) {
 776                                 BlockByte = Compressed[Pos];
 777                                 Pos++;
 778                         }
 779                         if (BlockType == 1) { //inter Block
 780                                 Integrator = Decompressed[Idx];
 781                         }
 782                         switch (BlockByte & 0xC0) {
 783                                 case 0x03<<6:
 784                                         Integrator += Compressed[ExtraPos];
 785                                         ExtraPos++;
 786                                         break;
 787                                 case 0x02<<6:
 788                                         Integrator += BlockCode;
 789                                         break;
 790                                 case 0x00:
 791                                         Integrator -= BlockCode;
 792                                         break;
 793                         }
 794                         Decompressed[Idx] = Integrator;
 795                         BlockByte <<= 2;
 796                         BlockLen -= 1;
 797                 }
 798         }
 799         *StartPos = ExtraPos;
 800         *BlockTypeStartPos = BlockTypePos;
 801         return Idx;
 802 }
 803
 804
 805 /*
 806  * usbvision_parse_compress()
 807  *
 808  * Parse compressed frame from the scratch buffer, put
 809  * decoded RGB value into the current frame buffer and add the written
 810  * number of bytes (RGB) to the *pcopylen.
 811  *
 812  */
 813 static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision,
 814                                            long *pcopylen)
 815 {
 816 #define USBVISION_STRIP_MAGIC           0x5A
 817 #define USBVISION_STRIP_LEN_MAX         400
 818 #define USBVISION_STRIP_HEADER_LEN      3
 819
 820         struct usbvision_frame *frame;
 821         unsigned char *f,*u = NULL ,*v = NULL;
 822         unsigned char StripData[USBVISION_STRIP_LEN_MAX];
 823         unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN];
 824         int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos;
 825         int clipmask_index, bytes_per_pixel, rc;
 826         int imageSize;
 827         unsigned char rv, gv, bv;
 828         static unsigned char *Y, *U, *V;
 829
 830         frame  = usbvision->curFrame;
 831         imageSize = frame->frmwidth * frame->frmheight;
 832         if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
 833              (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) {       // this is a planar format
 834                 //... v4l2_linesize not used here.
 835                 f = frame->data + (frame->width * frame->curline);
 836         } else
 837                 f = frame->data + (frame->v4l2_linesize * frame->curline);
 838
 839         if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers
 840                 // get base of u and b planes add halfoffset
 841
 842                 u = frame->data
 843                         + imageSize
 844                         + (frame->frmwidth >>1) * frame->curline ;
 845                 v = u + (imageSize >>1 );
 846
 847         } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){
 848
 849                 v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ;
 850                 u = v + (imageSize >>2) ;
 851         }
 852
 853         if (frame->curline == 0) {
 854                 usbvision_adjust_compression(usbvision);
 855         }
 856
 857         if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) {
 858                 return ParseState_Out;
 859         }
 860
 861         //get strip header without changing the scratch_read_ptr
 862         scratch_set_extra_ptr(usbvision, &StripPtr, 0);
 863         scratch_get_extra(usbvision, &StripHeader[0], &StripPtr,
 864                                 USBVISION_STRIP_HEADER_LEN);
 865
 866         if (StripHeader[0] != USBVISION_STRIP_MAGIC) {
 867                 // wrong strip magic
 868                 usbvision->stripMagicErrors++;
 869                 return ParseState_NextFrame;
 870         }
 871
 872         if (frame->curline != (int)StripHeader[2]) {
 873                 //line number missmatch error
 874                 usbvision->stripLineNumberErrors++;
 875         }
 876
 877         StripLen = 2 * (unsigned int)StripHeader[1];
 878         if (StripLen > USBVISION_STRIP_LEN_MAX) {
 879                 // strip overrun
 880                 // I think this never happens
 881                 usbvision_request_intra(usbvision);
 882         }
 883
 884         if (scratch_len(usbvision) < StripLen) {
 885                 //there is not enough data for the strip
 886                 return ParseState_Out;
 887         }
 888
 889         if (usbvision->IntraFrameBuffer) {
 890                 Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline;
 891                 U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2);
 892                 V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
 893         }
 894         else {
 895                 return ParseState_NextFrame;
 896         }
 897
 898         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
 899         clipmask_index = frame->curline * MAX_FRAME_WIDTH;
 900
 901         scratch_get(usbvision, StripData, StripLen);
 902
 903         IdxEnd = frame->frmwidth;
 904         BlockTypePos = USBVISION_STRIP_HEADER_LEN;
 905         StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2;
 906         BlockPos = StartBlockPos;
 907
 908         usbvision->BlockPos = BlockPos;
 909
 910         if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) {
 911                 //return ParseState_Continue;
 912         }
 913         if (StripLen > usbvision->maxStripLen) {
 914                 usbvision->maxStripLen = StripLen;
 915         }
 916
 917         if (frame->curline%2) {
 918                 if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
 919                 //return ParseState_Continue;
 920                 }
 921         }
 922         else {
 923                 if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
 924                         //return ParseState_Continue;
 925                 }
 926         }
 927
 928         if (BlockPos > usbvision->comprBlockPos) {
 929                 usbvision->comprBlockPos = BlockPos;
 930         }
 931         if (BlockPos > StripLen) {
 932                 usbvision->stripLenErrors++;
 933         }
 934
 935         for (Idx = 0; Idx < IdxEnd; Idx++) {
 936                 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 937                         *f++ = Y[Idx];
 938                         *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2];
 939                 }
 940                 else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
 941                         *f++ = Y[Idx];
 942                         if ( Idx & 0x01)
 943                                 *u++ = U[Idx>>1] ;
 944                         else
 945                                 *v++ = V[Idx>>1];
 946                 }
 947                 else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
 948                         *f++ = Y [Idx];
 949                         if ( !((  Idx & 0x01  ) | (  frame->curline & 0x01  )) ){
 950
 951 /*                               only need do this for 1 in 4 pixels */
 952 /*                               intraframe buffer is YUV420 format */
 953
 954                                 *u++ = U[Idx >>1];
 955                                 *v++ = V[Idx >>1];
 956                         }
 957
 958                 }
 959                 else {
 960                         YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv);
 961                         switch (frame->v4l2_format.format) {
 962                                 case V4L2_PIX_FMT_GREY:
 963                                         *f++ = Y[Idx];
 964                                         break;
 965                                 case V4L2_PIX_FMT_RGB555:
 966                                         *f++ = (0x1F & rv) |
 967                                                 (0xE0 & (gv << 5));
 968                                         *f++ = (0x03 & (gv >> 3)) |
 969                                                 (0x7C & (bv << 2));
 970                                         break;
 971                                 case V4L2_PIX_FMT_RGB565:
 972                                         *f++ = (0x1F & rv) |
 973                                                 (0xE0 & (gv << 5));
 974                                         *f++ = (0x07 & (gv >> 3)) |
 975                                                 (0xF8 &  bv);
 976                                         break;
 977                                 case V4L2_PIX_FMT_RGB24:
 978                                         *f++ = rv;
 979                                         *f++ = gv;
 980                                         *f++ = bv;
 981                                         break;
 982                                 case V4L2_PIX_FMT_RGB32:
 983                                         *f++ = rv;
 984                                         *f++ = gv;
 985                                         *f++ = bv;
 986                                         f++;
 987                                         break;
 988                         }
 989                 }
 990                 clipmask_index++;
 991         }
 992         /* Deal with non-integer no. of bytes for YUV420P */
 993         if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 )
 994                 *pcopylen += frame->v4l2_linesize;
 995         else
 996                 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
 997
 998         frame->curline += 1;
 999
1000         if (frame->curline >= frame->frmheight) {
1001                 return ParseState_NextFrame;
1002         }
1003         else {
1004                 return ParseState_Continue;
1005         }
1006
1007 }
1008
1009
1010 /*
1011  * usbvision_parse_lines_420()
1012  *
1013  * Parse two lines from the scratch buffer, put
1014  * decoded RGB value into the current frame buffer and add the written
1015  * number of bytes (RGB) to the *pcopylen.
1016  *
1017  */
1018 static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision,
1019                                            long *pcopylen)
1020 {
1021         struct usbvision_frame *frame;
1022         unsigned char *f_even = NULL, *f_odd = NULL;
1023         unsigned int pixel_per_line, block;
1024         int pixel, block_split;
1025         int y_ptr, u_ptr, v_ptr, y_odd_offset;
1026         const int   y_block_size = 128;
1027         const int  uv_block_size = 64;
1028         const int sub_block_size = 32;
1029         const int y_step[] = { 0, 0, 0, 2 },  y_step_size = 4;
1030         const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4;
1031         unsigned char y[2], u, v;       /* YUV components */
1032         int y_, u_, v_, vb, uvg, ur;
1033         int r_, g_, b_;                 /* RGB components */
1034         unsigned char g;
1035         int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
1036         int clipmask_add, stretch_bytes;
1037
1038         frame  = usbvision->curFrame;
1039         f_even = frame->data + (frame->v4l2_linesize * frame->curline);
1040         f_odd  = f_even + frame->v4l2_linesize * usbvision->stretch_height;
1041
1042         /* Make sure there's enough data for the entire line */
1043         /* In this mode usbvision transfer 3 bytes for every 2 pixels */
1044         /* I need two lines to decode the color */
1045         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
1046         stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
1047         clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
1048         clipmask_odd_index  = clipmask_even_index + MAX_FRAME_WIDTH;
1049         clipmask_add = usbvision->stretch_width;
1050         pixel_per_line = frame->isocHeader.frameWidth;
1051
1052         if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
1053                 //printk(KERN_DEBUG "out of data, need %d\n", len);
1054                 return ParseState_Out;
1055         }
1056
1057         if ((frame->curline + 1) >= frame->frmheight) {
1058                 return ParseState_NextFrame;
1059         }
1060
1061         block_split = (pixel_per_line%y_block_size) ? 1 : 0;    //are some blocks splitted into different lines?
1062
1063         y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
1064                         + block_split * uv_block_size;
1065
1066         scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
1067         scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
1068         scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
1069                         + (4 - block_split) * sub_block_size);
1070
1071         for (block = 0; block < (pixel_per_line / sub_block_size);
1072              block++) {
1073
1074
1075                 for (pixel = 0; pixel < sub_block_size; pixel +=2) {
1076                         scratch_get(usbvision, &y[0], 2);
1077                         scratch_get_extra(usbvision, &u, &u_ptr, 1);
1078                         scratch_get_extra(usbvision, &v, &v_ptr, 1);
1079
1080                         //I don't use the YUV_TO_RGB macro for better performance
1081                         v_ = v - 128;
1082                         u_ = u - 128;
1083                         vb =              132252 * v_;
1084                         uvg= -53281 * u_ - 25625 * v_;
1085                         ur = 104595 * u_;
1086
1087                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1088                                 *f_even++ = y[0];
1089                                 *f_even++ = v;
1090                         }
1091                         else {
1092                                 y_ = 76284 * (y[0] - 16);
1093
1094                                 b_ = (y_ + vb) >> 16;
1095                                 g_ = (y_ + uvg)>> 16;
1096                                 r_ = (y_ + ur) >> 16;
1097
1098                                 switch (frame->v4l2_format.format) {
1099                                 case V4L2_PIX_FMT_RGB565:
1100                                         g = LIMIT_RGB(g_);
1101                                         *f_even++ =
1102                                                 (0x1F & LIMIT_RGB(r_)) |
1103                                                 (0xE0 & (g << 5));
1104                                         *f_even++ =
1105                                                 (0x07 & (g >> 3)) |
1106                                                 (0xF8 &  LIMIT_RGB(b_));
1107                                         break;
1108                                 case V4L2_PIX_FMT_RGB24:
1109                                         *f_even++ = LIMIT_RGB(r_);
1110                                         *f_even++ = LIMIT_RGB(g_);
1111                                         *f_even++ = LIMIT_RGB(b_);
1112                                         break;
1113                                 case V4L2_PIX_FMT_RGB32:
1114                                         *f_even++ = LIMIT_RGB(r_);
1115                                         *f_even++ = LIMIT_RGB(g_);
1116                                         *f_even++ = LIMIT_RGB(b_);
1117                                         f_even++;
1118                                         break;
1119                                 case V4L2_PIX_FMT_RGB555:
1120                                         g = LIMIT_RGB(g_);
1121                                         *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1122                                                 (0xE0 & (g << 5));
1123                                         *f_even++ = (0x03 & (g >> 3)) |
1124                                                 (0x7C & (LIMIT_RGB(b_) << 2));
1125                                         break;
1126                                 }
1127                         }
1128                         clipmask_even_index += clipmask_add;
1129                         f_even += stretch_bytes;
1130
1131                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1132                                 *f_even++ = y[1];
1133                                 *f_even++ = u;
1134                         }
1135                         else {
1136                                 y_ = 76284 * (y[1] - 16);
1137
1138                                 b_ = (y_ + vb) >> 16;
1139                                 g_ = (y_ + uvg)>> 16;
1140                                 r_ = (y_ + ur) >> 16;
1141
1142                                 switch (frame->v4l2_format.format) {
1143                                 case V4L2_PIX_FMT_RGB565:
1144                                         g = LIMIT_RGB(g_);
1145                                         *f_even++ =
1146                                                 (0x1F & LIMIT_RGB(r_)) |
1147                                                 (0xE0 & (g << 5));
1148                                         *f_even++ =
1149                                                 (0x07 & (g >> 3)) |
1150                                                 (0xF8 &  LIMIT_RGB(b_));
1151                                         break;
1152                                 case V4L2_PIX_FMT_RGB24:
1153                                         *f_even++ = LIMIT_RGB(r_);
1154                                         *f_even++ = LIMIT_RGB(g_);
1155                                         *f_even++ = LIMIT_RGB(b_);
1156                                         break;
1157                                 case V4L2_PIX_FMT_RGB32:
1158                                         *f_even++ = LIMIT_RGB(r_);
1159                                         *f_even++ = LIMIT_RGB(g_);
1160                                         *f_even++ = LIMIT_RGB(b_);
1161                                         f_even++;
1162                                         break;
1163                                 case V4L2_PIX_FMT_RGB555:
1164                                         g = LIMIT_RGB(g_);
1165                                         *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1166                                                 (0xE0 & (g << 5));
1167                                         *f_even++ = (0x03 & (g >> 3)) |
1168                                                 (0x7C & (LIMIT_RGB(b_) << 2));
1169                                         break;
1170                                 }
1171                         }
1172                         clipmask_even_index += clipmask_add;
1173                         f_even += stretch_bytes;
1174
1175                         scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1176
1177                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1178                                 *f_odd++ = y[0];
1179                                 *f_odd++ = v;
1180                         }
1181                         else {
1182                                 y_ = 76284 * (y[0] - 16);
1183
1184                                 b_ = (y_ + vb) >> 16;
1185                                 g_ = (y_ + uvg)>> 16;
1186                                 r_ = (y_ + ur) >> 16;
1187
1188                                 switch (frame->v4l2_format.format) {
1189                                 case V4L2_PIX_FMT_RGB565:
1190                                         g = LIMIT_RGB(g_);
1191                                         *f_odd++ =
1192                                                 (0x1F & LIMIT_RGB(r_)) |
1193                                                 (0xE0 & (g << 5));
1194                                         *f_odd++ =
1195                                                 (0x07 & (g >> 3)) |
1196                                                 (0xF8 &  LIMIT_RGB(b_));
1197                                         break;
1198                                 case V4L2_PIX_FMT_RGB24:
1199                                         *f_odd++ = LIMIT_RGB(r_);
1200                                         *f_odd++ = LIMIT_RGB(g_);
1201                                         *f_odd++ = LIMIT_RGB(b_);
1202                                         break;
1203                                 case V4L2_PIX_FMT_RGB32:
1204                                         *f_odd++ = LIMIT_RGB(r_);
1205                                         *f_odd++ = LIMIT_RGB(g_);
1206                                         *f_odd++ = LIMIT_RGB(b_);
1207                                         f_odd++;
1208                                         break;
1209                                 case V4L2_PIX_FMT_RGB555:
1210                                         g = LIMIT_RGB(g_);
1211                                         *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1212                                                 (0xE0 & (g << 5));
1213                                         *f_odd++ = (0x03 & (g >> 3)) |
1214                                                 (0x7C & (LIMIT_RGB(b_) << 2));
1215                                         break;
1216                                 }
1217                         }
1218                         clipmask_odd_index += clipmask_add;
1219                         f_odd += stretch_bytes;
1220
1221                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1222                                 *f_odd++ = y[1];
1223                                 *f_odd++ = u;
1224                         }
1225                         else {
1226                                 y_ = 76284 * (y[1] - 16);
1227
1228                                 b_ = (y_ + vb) >> 16;
1229                                 g_ = (y_ + uvg)>> 16;
1230                                 r_ = (y_ + ur) >> 16;
1231
1232                                 switch (frame->v4l2_format.format) {
1233                                 case V4L2_PIX_FMT_RGB565:
1234                                         g = LIMIT_RGB(g_);
1235                                         *f_odd++ =
1236                                                 (0x1F & LIMIT_RGB(r_)) |
1237                                                 (0xE0 & (g << 5));
1238                                         *f_odd++ =
1239                                                 (0x07 & (g >> 3)) |
1240                                                 (0xF8 &  LIMIT_RGB(b_));
1241                                         break;
1242                                 case V4L2_PIX_FMT_RGB24:
1243                                         *f_odd++ = LIMIT_RGB(r_);
1244                                         *f_odd++ = LIMIT_RGB(g_);
1245                                         *f_odd++ = LIMIT_RGB(b_);
1246                                         break;
1247                                 case V4L2_PIX_FMT_RGB32:
1248                                         *f_odd++ = LIMIT_RGB(r_);
1249                                         *f_odd++ = LIMIT_RGB(g_);
1250                                         *f_odd++ = LIMIT_RGB(b_);
1251                                         f_odd++;
1252                                         break;
1253                                 case V4L2_PIX_FMT_RGB555:
1254                                         g = LIMIT_RGB(g_);
1255                                         *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1256                                                 (0xE0 & (g << 5));
1257                                         *f_odd++ = (0x03 & (g >> 3)) |
1258                                                 (0x7C & (LIMIT_RGB(b_) << 2));
1259                                         break;
1260                                 }
1261                         }
1262                         clipmask_odd_index += clipmask_add;
1263                         f_odd += stretch_bytes;
1264                 }
1265
1266                 scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size);
1267                 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1268                                 * sub_block_size);
1269                 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1270                                 * sub_block_size);
1271                 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1272                                 * sub_block_size);
1273         }
1274
1275         scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1276                         + block_split * sub_block_size);
1277
1278         frame->curline += 2 * usbvision->stretch_height;
1279         *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1280
1281         if (frame->curline >= frame->frmheight)
1282                 return ParseState_NextFrame;
1283         else
1284                 return ParseState_Continue;
1285 }
1286
1287 /*
1288  * usbvision_parse_data()
1289  *
1290  * Generic routine to parse the scratch buffer. It employs either
1291  * usbvision_find_header() or usbvision_parse_lines() to do most
1292  * of work.
1293  *
1294  */
1295 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1296 {
1297         struct usbvision_frame *frame;
1298         enum ParseState newstate;
1299         long copylen = 0;
1300         unsigned long lock_flags;
1301
1302         frame = usbvision->curFrame;
1303
1304         PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1305
1306         while (1) {
1307
1308                 newstate = ParseState_Out;
1309                 if (scratch_len(usbvision)) {
1310                         if (frame->scanstate == ScanState_Scanning) {
1311                                 newstate = usbvision_find_header(usbvision);
1312                         }
1313                         else if (frame->scanstate == ScanState_Lines) {
1314                                 if (usbvision->isocMode == ISOC_MODE_YUV420) {
1315                                         newstate = usbvision_parse_lines_420(usbvision, &copylen);
1316                                 }
1317                                 else if (usbvision->isocMode == ISOC_MODE_YUV422) {
1318                                         newstate = usbvision_parse_lines_422(usbvision, &copylen);
1319                                 }
1320                                 else if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
1321                                         newstate = usbvision_parse_compress(usbvision, &copylen);
1322                                 }
1323
1324                         }
1325                 }
1326                 if (newstate == ParseState_Continue) {
1327                         continue;
1328                 }
1329                 else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) {
1330                         break;
1331                 }
1332                 else {
1333                         return; /* ParseState_EndParse */
1334                 }
1335         }
1336
1337         if (newstate == ParseState_NextFrame) {
1338                 frame->grabstate = FrameState_Done;
1339                 do_gettimeofday(&(frame->timestamp));
1340                 frame->sequence = usbvision->frame_num;
1341
1342                 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1343                 list_move_tail(&(frame->frame), &usbvision->outqueue);
1344                 usbvision->curFrame = NULL;
1345                 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1346
1347                 usbvision->frame_num++;
1348
1349                 /* This will cause the process to request another frame. */
1350                 if (waitqueue_active(&usbvision->wait_frame)) {
1351                         PDEBUG(DBG_PARSE, "Wake up !");
1352                         wake_up_interruptible(&usbvision->wait_frame);
1353                 }
1354         }
1355         else
1356                 frame->grabstate = FrameState_Grabbing;
1357
1358
1359         /* Update the frame's uncompressed length. */
1360         frame->scanlength += copylen;
1361 }
1362
1363
1364 /*
1365  * Make all of the blocks of data contiguous
1366  */
1367 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1368                                           struct urb *urb)
1369 {
1370         unsigned char *packet_data;
1371         int i, totlen = 0;
1372
1373         for (i = 0; i < urb->number_of_packets; i++) {
1374                 int packet_len = urb->iso_frame_desc[i].actual_length;
1375                 int packet_stat = urb->iso_frame_desc[i].status;
1376
1377                 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1378
1379                 /* Detect and ignore errored packets */
1380                 if (packet_stat) {      // packet_stat != 0 ?????????????
1381                         PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1382                         usbvision->isocErrCount++;
1383                         continue;
1384                 }
1385
1386                 /* Detect and ignore empty packets */
1387                 if (packet_len < 0) {
1388                         PDEBUG(DBG_ISOC, "error packet [%d]", i);
1389                         usbvision->isocSkipCount++;
1390                         continue;
1391                 }
1392                 else if (packet_len == 0) {     /* Frame end ????? */
1393                         PDEBUG(DBG_ISOC, "null packet [%d]", i);
1394                         usbvision->isocstate=IsocState_NoFrame;
1395                         usbvision->isocSkipCount++;
1396                         continue;
1397                 }
1398                 else if (packet_len > usbvision->isocPacketSize) {
1399                         PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i);
1400                         usbvision->isocSkipCount++;
1401                         continue;
1402                 }
1403
1404                 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1405
1406                 if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins
1407                         usbvision->isocstate=IsocState_InFrame;
1408                         scratch_mark_header(usbvision);
1409                         usbvision_measure_bandwidth(usbvision);
1410                         PDEBUG(DBG_ISOC, "packet with header");
1411                 }
1412
1413                 /*
1414                  * If usbvision continues to feed us with data but there is no
1415                  * consumption (if, for example, V4L client fell asleep) we
1416                  * may overflow the buffer. We have to move old data over to
1417                  * free room for new data. This is bad for old data. If we
1418                  * just drop new data then it's bad for new data... choose
1419                  * your favorite evil here.
1420                  */
1421                 if (scratch_free(usbvision) < packet_len) {
1422
1423                         usbvision->scratch_ovf_count++;
1424                         PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1425                                scratch_len(usbvision), packet_len);
1426                         scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1427                 }
1428
1429                 /* Now we know that there is enough room in scratch buffer */
1430                 scratch_put(usbvision, packet_data, packet_len);
1431                 totlen += packet_len;
1432                 usbvision->isocDataCount += packet_len;
1433                 usbvision->isocPacketCount++;
1434         }
1435 #if ENABLE_HEXDUMP
1436         if (totlen > 0) {
1437                 static int foo;
1438                 if (foo < 1) {
1439                         printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1440                         usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1441                         ++foo;
1442                 }
1443         }
1444 #endif
1445  return totlen;
1446 }
1447
1448 static void usbvision_isocIrq(struct urb *urb)
1449 {
1450         int errCode = 0;
1451         int len;
1452         struct usb_usbvision *usbvision = urb->context;
1453         int i;
1454         unsigned long startTime = jiffies;
1455         struct usbvision_frame **f;
1456
1457         /* We don't want to do anything if we are about to be removed! */
1458         if (!USBVISION_IS_OPERATIONAL(usbvision))
1459                 return;
1460
1461         /* any urb with wrong status is ignored without acknowledgement */
1462         if (urb->status == -ENOENT) {
1463                 return;
1464         }
1465
1466         f = &usbvision->curFrame;
1467
1468         /* Manage streaming interruption */
1469         if (usbvision->streaming == Stream_Interrupt) {
1470                 usbvision->streaming = Stream_Idle;
1471                 if ((*f)) {
1472                         (*f)->grabstate = FrameState_Ready;
1473                         (*f)->scanstate = ScanState_Scanning;
1474                 }
1475                 PDEBUG(DBG_IRQ, "stream interrupted");
1476                 wake_up_interruptible(&usbvision->wait_stream);
1477         }
1478
1479         /* Copy the data received into our scratch buffer */
1480         len = usbvision_compress_isochronous(usbvision, urb);
1481
1482         usbvision->isocUrbCount++;
1483         usbvision->urb_length = len;
1484
1485         if (usbvision->streaming == Stream_On) {
1486
1487                 /* If we collected enough data let's parse! */
1488                 if ((scratch_len(usbvision) > USBVISION_HEADER_LENGTH) &&
1489                     (!list_empty(&(usbvision->inqueue))) ) {
1490                         if (!(*f)) {
1491                                 (*f) = list_entry(usbvision->inqueue.next,
1492                                                   struct usbvision_frame,
1493                                                   frame);
1494                         }
1495                         usbvision_parse_data(usbvision);
1496                 }
1497                 else {
1498                         /*If we don't have a frame
1499                           we're current working on, complain */
1500                         PDEBUG(DBG_IRQ,
1501                                "received data, but no one needs it");
1502                         scratch_reset(usbvision);
1503                 }
1504         }
1505         else {
1506                 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1507                 scratch_reset(usbvision);
1508         }
1509
1510         usbvision->timeInIrq += jiffies - startTime;
1511
1512         for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1513                 urb->iso_frame_desc[i].status = 0;
1514                 urb->iso_frame_desc[i].actual_length = 0;
1515         }
1516
1517         urb->status = 0;
1518         urb->dev = usbvision->dev;
1519         errCode = usb_submit_urb (urb, GFP_ATOMIC);
1520
1521         if(errCode) {
1522                 err("%s: usb_submit_urb failed: error %d",
1523                     __func__, errCode);
1524         }
1525
1526         return;
1527 }
1528
1529 /*************************************/
1530 /* Low level usbvision access functions */
1531 /*************************************/
1532
1533 /*
1534  * usbvision_read_reg()
1535  *
1536  * return  < 0 -> Error
1537  *        >= 0 -> Data
1538  */
1539
1540 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1541 {
1542         int errCode = 0;
1543         unsigned char buffer[1];
1544
1545         if (!USBVISION_IS_OPERATIONAL(usbvision))
1546                 return -1;
1547
1548         errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1549                                 USBVISION_OP_CODE,
1550                                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1551                                 0, (__u16) reg, buffer, 1, HZ);
1552
1553         if (errCode < 0) {
1554                 err("%s: failed: error %d", __func__, errCode);
1555                 return errCode;
1556         }
1557         return buffer[0];
1558 }
1559
1560 /*
1561  * usbvision_write_reg()
1562  *
1563  * return 1 -> Reg written
1564  *        0 -> usbvision is not yet ready
1565  *       -1 -> Something went wrong
1566  */
1567
1568 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1569                             unsigned char value)
1570 {
1571         int errCode = 0;
1572
1573         if (!USBVISION_IS_OPERATIONAL(usbvision))
1574                 return 0;
1575
1576         errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1577                                 USBVISION_OP_CODE,
1578                                 USB_DIR_OUT | USB_TYPE_VENDOR |
1579                                 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
1580
1581         if (errCode < 0) {
1582                 err("%s: failed: error %d", __func__, errCode);
1583         }
1584         return errCode;
1585 }
1586
1587
1588 static void usbvision_ctrlUrb_complete(struct urb *urb)
1589 {
1590         struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1591
1592         PDEBUG(DBG_IRQ, "");
1593         usbvision->ctrlUrbBusy = 0;
1594         if (waitqueue_active(&usbvision->ctrlUrb_wq)) {
1595                 wake_up_interruptible(&usbvision->ctrlUrb_wq);
1596         }
1597 }
1598
1599
1600 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address,
1601                                                                         unsigned char *data, int len)
1602 {
1603         int errCode = 0;
1604
1605         PDEBUG(DBG_IRQ, "");
1606         if (len > 8) {
1607                 return -EFAULT;
1608         }
1609         if (usbvision->ctrlUrbBusy) {
1610                 return -EBUSY;
1611         }
1612         usbvision->ctrlUrbBusy = 1;
1613
1614         usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1615         usbvision->ctrlUrbSetup.bRequest     = USBVISION_OP_CODE;
1616         usbvision->ctrlUrbSetup.wValue       = 0;
1617         usbvision->ctrlUrbSetup.wIndex       = cpu_to_le16(address);
1618         usbvision->ctrlUrbSetup.wLength      = cpu_to_le16(len);
1619         usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev,
1620                                                         usb_sndctrlpipe(usbvision->dev, 1),
1621                                                         (unsigned char *)&usbvision->ctrlUrbSetup,
1622                                                         (void *)usbvision->ctrlUrbBuffer, len,
1623                                                         usbvision_ctrlUrb_complete,
1624                                                         (void *)usbvision);
1625
1626         memcpy(usbvision->ctrlUrbBuffer, data, len);
1627
1628         errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC);
1629         if (errCode < 0) {
1630                 // error in usb_submit_urb()
1631                 usbvision->ctrlUrbBusy = 0;
1632         }
1633         PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode);
1634         return errCode;
1635 }
1636
1637
1638 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1639 {
1640         int errCode = 0;
1641
1642         usbvision->lastIsocFrameNum = -1;
1643         usbvision->isocDataCount = 0;
1644         usbvision->isocPacketCount = 0;
1645         usbvision->isocSkipCount = 0;
1646         usbvision->comprLevel = 50;
1647         usbvision->lastComprLevel = -1;
1648         usbvision->isocUrbCount = 0;
1649         usbvision->requestIntra = 1;
1650         usbvision->isocMeasureBandwidthCount = 0;
1651
1652         return errCode;
1653 }
1654
1655 /* this function measures the used bandwidth since last call
1656  * return:    0 : no error
1657  * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize
1658  */
1659 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision)
1660 {
1661         int errCode = 0;
1662
1663         if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames
1664                 usbvision->isocMeasureBandwidthCount++;
1665                 return errCode;
1666         }
1667         if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) {
1668                 usbvision->usedBandwidth = usbvision->isocDataCount /
1669                                         (usbvision->isocPacketCount + usbvision->isocSkipCount) *
1670                                         100 / usbvision->isocPacketSize;
1671         }
1672         usbvision->isocMeasureBandwidthCount = 0;
1673         usbvision->isocDataCount = 0;
1674         usbvision->isocPacketCount = 0;
1675         usbvision->isocSkipCount = 0;
1676         return errCode;
1677 }
1678
1679 static int usbvision_adjust_compression (struct usb_usbvision *usbvision)
1680 {
1681         int errCode = 0;
1682         unsigned char buffer[6];
1683
1684         PDEBUG(DBG_IRQ, "");
1685         if ((adjustCompression) && (usbvision->usedBandwidth > 0)) {
1686                 usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2;
1687                 RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100);
1688                 if (usbvision->comprLevel != usbvision->lastComprLevel) {
1689                         int distorsion;
1690                         if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) {
1691                                 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100);      // PCM Threshold 1
1692                                 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100);       // PCM Threshold 2
1693                                 distorsion = 7 + 248 * usbvision->comprLevel / 100;
1694                                 buffer[2] = (unsigned char)(distorsion & 0xFF);                         // Average distorsion Threshold (inter)
1695                                 buffer[3] = (unsigned char)(distorsion & 0xFF);                         // Average distorsion Threshold (intra)
1696                                 distorsion = 1 + 42 * usbvision->comprLevel / 100;
1697                                 buffer[4] = (unsigned char)(distorsion & 0xFF);                         // Maximum distorsion Threshold (inter)
1698                                 buffer[5] = (unsigned char)(distorsion & 0xFF);                         // Maximum distorsion Threshold (intra)
1699                         }
1700                         else { //BRIDGE_NT1003
1701                                 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100);      // PCM threshold 1
1702                                 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100);       // PCM threshold 2
1703                                 distorsion = 2 + 253 * usbvision->comprLevel / 100;
1704                                 buffer[2] = (unsigned char)(distorsion & 0xFF);                         // distorsion threshold bit0-7
1705                                 buffer[3] = 0;  //(unsigned char)((distorsion >> 8) & 0x0F);            // distorsion threshold bit 8-11
1706                                 distorsion = 0 + 43 * usbvision->comprLevel / 100;
1707                                 buffer[4] = (unsigned char)(distorsion & 0xFF);                         // maximum distorsion bit0-7
1708                                 buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01);             // maximum distorsion bit 8
1709                         }
1710                         errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1711                         if (errCode == 0){
1712                                 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1713                                                                 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1714                                 usbvision->lastComprLevel = usbvision->comprLevel;
1715                         }
1716                 }
1717         }
1718         return errCode;
1719 }
1720
1721 static int usbvision_request_intra (struct usb_usbvision *usbvision)
1722 {
1723         int errCode = 0;
1724         unsigned char buffer[1];
1725
1726         PDEBUG(DBG_IRQ, "");
1727         usbvision->requestIntra = 1;
1728         buffer[0] = 1;
1729         usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1730         return errCode;
1731 }
1732
1733 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision)
1734 {
1735         int errCode = 0;
1736         unsigned char buffer[1];
1737
1738         PDEBUG(DBG_IRQ, "");
1739         usbvision->requestIntra = 0;
1740         buffer[0] = 0;
1741         usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1742         return errCode;
1743 }
1744
1745 /*******************************
1746  * usbvision utility functions
1747  *******************************/
1748
1749 int usbvision_power_off(struct usb_usbvision *usbvision)
1750 {
1751         int errCode = 0;
1752
1753         PDEBUG(DBG_FUNC, "");
1754
1755         errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1756         if (errCode == 1) {
1757                 usbvision->power = 0;
1758         }
1759         PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode);
1760         return errCode;
1761 }
1762
1763 /*
1764  * usbvision_set_video_format()
1765  *
1766  */
1767 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1768 {
1769         static const char proc[] = "usbvision_set_video_format";
1770         int rc;
1771         unsigned char value[2];
1772
1773         if (!USBVISION_IS_OPERATIONAL(usbvision))
1774                 return 0;
1775
1776         PDEBUG(DBG_FUNC, "isocMode %#02x", format);
1777
1778         if ((format != ISOC_MODE_YUV422)
1779             && (format != ISOC_MODE_YUV420)
1780             && (format != ISOC_MODE_COMPRESS)) {
1781                 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1782                        format);
1783                 format = ISOC_MODE_YUV420;
1784         }
1785         value[0] = 0x0A;  //TODO: See the effect of the filter
1786         value[1] = format; // Sets the VO_MODE register which follows FILT_CONT
1787         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1788                              USBVISION_OP_CODE,
1789                              USB_DIR_OUT | USB_TYPE_VENDOR |
1790                              USB_RECIP_ENDPOINT, 0,
1791                              (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1792
1793         if (rc < 0) {
1794                 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1795                        "reconnect or reload driver.\n", proc, rc);
1796         }
1797         usbvision->isocMode = format;
1798         return rc;
1799 }
1800
1801 /*
1802  * usbvision_set_output()
1803  *
1804  */
1805
1806 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1807                          int height)
1808 {
1809         int errCode = 0;
1810         int UsbWidth, UsbHeight;
1811         unsigned int frameRate=0, frameDrop=0;
1812         unsigned char value[4];
1813
1814         if (!USBVISION_IS_OPERATIONAL(usbvision)) {
1815                 return 0;
1816         }
1817
1818         if (width > MAX_USB_WIDTH) {
1819                 UsbWidth = width / 2;
1820                 usbvision->stretch_width = 2;
1821         }
1822         else {
1823                 UsbWidth = width;
1824                 usbvision->stretch_width = 1;
1825         }
1826
1827         if (height > MAX_USB_HEIGHT) {
1828                 UsbHeight = height / 2;
1829                 usbvision->stretch_height = 2;
1830         }
1831         else {
1832                 UsbHeight = height;
1833                 usbvision->stretch_height = 1;
1834         }
1835
1836         RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1837         UsbWidth &= ~(MIN_FRAME_WIDTH-1);
1838         RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1839         UsbHeight &= ~(1);
1840
1841         PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1842                                                 UsbWidth, UsbHeight, width, height,
1843                                                 usbvision->stretch_width, usbvision->stretch_height);
1844
1845         /* I'll not rewrite the same values */
1846         if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) {
1847                 value[0] = UsbWidth & 0xff;             //LSB
1848                 value[1] = (UsbWidth >> 8) & 0x03;      //MSB
1849                 value[2] = UsbHeight & 0xff;            //LSB
1850                 value[3] = (UsbHeight >> 8) & 0x03;     //MSB
1851
1852                 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1853                              USBVISION_OP_CODE,
1854                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1855                                  0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1856
1857                 if (errCode < 0) {
1858                         err("%s failed: error %d", __func__, errCode);
1859                         return errCode;
1860                 }
1861                 usbvision->curwidth = usbvision->stretch_width * UsbWidth;
1862                 usbvision->curheight = usbvision->stretch_height * UsbHeight;
1863         }
1864
1865         if (usbvision->isocMode == ISOC_MODE_YUV422) {
1866                 frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2);
1867         }
1868         else if (usbvision->isocMode == ISOC_MODE_YUV420) {
1869                 frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8);
1870         }
1871         else {
1872                 frameRate = FRAMERATE_MAX;
1873         }
1874
1875         if (usbvision->tvnormId & V4L2_STD_625_50) {
1876                 frameDrop = frameRate * 32 / 25 - 1;
1877         }
1878         else if (usbvision->tvnormId & V4L2_STD_525_60) {
1879                 frameDrop = frameRate * 32 / 30 - 1;
1880         }
1881
1882         RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX);
1883
1884         PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop);
1885
1886         frameDrop = FRAMERATE_MAX;      // We can allow the maximum here, because dropping is controlled
1887
1888         /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1889                 => frameSkip = 4;
1890                 => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1891
1892            frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1893             => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1894                 => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1895         */
1896         errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop);
1897         return errCode;
1898 }
1899
1900
1901 /*
1902  * usbvision_frames_alloc
1903  * allocate the required frames
1904  */
1905 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
1906 {
1907         int i;
1908
1909         /*needs to be page aligned cause the buffers can be mapped individually! */
1910         usbvision->max_frame_size =  PAGE_ALIGN(usbvision->curwidth *
1911                                                 usbvision->curheight *
1912                                                 usbvision->palette.bytes_per_pixel);
1913
1914         /* Try to do my best to allocate the frames the user want in the remaining memory */
1915         usbvision->num_frames = number_of_frames;
1916         while (usbvision->num_frames > 0) {
1917                 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
1918                 if((usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size))) {
1919                         break;
1920                 }
1921                 usbvision->num_frames--;
1922         }
1923
1924         spin_lock_init(&usbvision->queue_lock);
1925         init_waitqueue_head(&usbvision->wait_frame);
1926         init_waitqueue_head(&usbvision->wait_stream);
1927
1928         /* Allocate all buffers */
1929         for (i = 0; i < usbvision->num_frames; i++) {
1930                 usbvision->frame[i].index = i;
1931                 usbvision->frame[i].grabstate = FrameState_Unused;
1932                 usbvision->frame[i].data = usbvision->fbuf +
1933                         i * usbvision->max_frame_size;
1934                 /*
1935                  * Set default sizes for read operation.
1936                  */
1937                 usbvision->stretch_width = 1;
1938                 usbvision->stretch_height = 1;
1939                 usbvision->frame[i].width = usbvision->curwidth;
1940                 usbvision->frame[i].height = usbvision->curheight;
1941                 usbvision->frame[i].bytes_read = 0;
1942         }
1943         PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",usbvision->num_frames,usbvision->max_frame_size);
1944         return usbvision->num_frames;
1945 }
1946
1947 /*
1948  * usbvision_frames_free
1949  * frees memory allocated for the frames
1950  */
1951 void usbvision_frames_free(struct usb_usbvision *usbvision)
1952 {
1953         /* Have to free all that memory */
1954         PDEBUG(DBG_FUNC, "free %d frames",usbvision->num_frames);
1955
1956         if (usbvision->fbuf != NULL) {
1957                 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1958                 usbvision->fbuf = NULL;
1959
1960                 usbvision->num_frames = 0;
1961         }
1962 }
1963 /*
1964  * usbvision_empty_framequeues()
1965  * prepare queues for incoming and outgoing frames
1966  */
1967 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1968 {
1969         u32 i;
1970
1971         INIT_LIST_HEAD(&(usbvision->inqueue));
1972         INIT_LIST_HEAD(&(usbvision->outqueue));
1973
1974         for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1975                 usbvision->frame[i].grabstate = FrameState_Unused;
1976                 usbvision->frame[i].bytes_read = 0;
1977         }
1978 }
1979
1980 /*
1981  * usbvision_stream_interrupt()
1982  * stops streaming
1983  */
1984 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1985 {
1986         int ret = 0;
1987
1988         /* stop reading from the device */
1989
1990         usbvision->streaming = Stream_Interrupt;
1991         ret = wait_event_timeout(usbvision->wait_stream,
1992                                  (usbvision->streaming == Stream_Idle),
1993                                  msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1994         return ret;
1995 }
1996
1997 /*
1998  * usbvision_set_compress_params()
1999  *
2000  */
2001
2002 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
2003 {
2004         static const char proc[] = "usbvision_set_compresion_params: ";
2005         int rc;
2006         unsigned char value[6];
2007
2008         value[0] = 0x0F;    // Intra-Compression cycle
2009         value[1] = 0x01;    // Reg.45 one line per strip
2010         value[2] = 0x00;    // Reg.46 Force intra mode on all new frames
2011         value[3] = 0x00;    // Reg.47 FORCE_UP <- 0 normal operation (not force)
2012         value[4] = 0xA2;    // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode.
2013         value[5] = 0x00;    // Reg.49 DVI_YUV This has nothing to do with compression
2014
2015         //catched values for NT1004
2016         // value[0] = 0xFF; // Never apply intra mode automatically
2017         // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip
2018         // value[2] = 0x01; // Force intra mode on all new frames
2019         // value[3] = 0x00; // Strip size 400 Bytes; do not force up
2020         // value[4] = 0xA2; //
2021         if (!USBVISION_IS_OPERATIONAL(usbvision))
2022                 return 0;
2023
2024         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2025                              USBVISION_OP_CODE,
2026                              USB_DIR_OUT | USB_TYPE_VENDOR |
2027                              USB_RECIP_ENDPOINT, 0,
2028                              (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
2029
2030         if (rc < 0) {
2031                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2032                        "reconnect or reload driver.\n", proc, rc);
2033                 return rc;
2034         }
2035
2036         if (usbvision->bridgeType == BRIDGE_NT1004) {
2037                 value[0] =  20; // PCM Threshold 1
2038                 value[1] =  12; // PCM Threshold 2
2039                 value[2] = 255; // Distorsion Threshold inter
2040                 value[3] = 255; // Distorsion Threshold intra
2041                 value[4] =  43; // Max Distorsion inter
2042                 value[5] =  43; // Max Distorsion intra
2043         }
2044         else {
2045                 value[0] =  20; // PCM Threshold 1
2046                 value[1] =  12; // PCM Threshold 2
2047                 value[2] = 255; // Distorsion Threshold d7-d0
2048                 value[3] =   0; // Distorsion Threshold d11-d8
2049                 value[4] =  43; // Max Distorsion d7-d0
2050                 value[5] =   0; // Max Distorsion d8
2051         }
2052
2053         if (!USBVISION_IS_OPERATIONAL(usbvision))
2054                 return 0;
2055
2056         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2057                              USBVISION_OP_CODE,
2058                              USB_DIR_OUT | USB_TYPE_VENDOR |
2059                              USB_RECIP_ENDPOINT, 0,
2060                              (__u16) USBVISION_PCM_THR1, value, 6, HZ);
2061
2062         if (rc < 0) {
2063                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2064                        "reconnect or reload driver.\n", proc, rc);
2065                 return rc;
2066         }
2067
2068
2069         return rc;
2070 }
2071
2072
2073 /*
2074  * usbvision_set_input()
2075  *
2076  * Set the input (saa711x, ...) size x y and other misc input params
2077  * I've no idea if this parameters are right
2078  *
2079  */
2080 int usbvision_set_input(struct usb_usbvision *usbvision)
2081 {
2082         static const char proc[] = "usbvision_set_input: ";
2083         int rc;
2084         unsigned char value[8];
2085         unsigned char dvi_yuv_value;
2086
2087         if (!USBVISION_IS_OPERATIONAL(usbvision))
2088                 return 0;
2089
2090         /* Set input format expected from decoder*/
2091         if (usbvision_device_data[usbvision->DevModel].Vin_Reg1_override) {
2092                 value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1;
2093         } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2094                 /* SAA7113 uses 8 bit output */
2095                 value[0] = USBVISION_8_422_SYNC;
2096         } else {
2097                 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
2098                  * as that is how saa7111 is configured */
2099                 value[0] = USBVISION_16_422_SYNC;
2100                 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
2101         }
2102
2103         rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
2104         if (rc < 0) {
2105                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2106                        "reconnect or reload driver.\n", proc, rc);
2107                 return rc;
2108         }
2109
2110
2111         if (usbvision->tvnormId & V4L2_STD_PAL) {
2112                 value[0] = 0xC0;
2113                 value[1] = 0x02;        //0x02C0 -> 704 Input video line length
2114                 value[2] = 0x20;
2115                 value[3] = 0x01;        //0x0120 -> 288 Input video n. of lines
2116                 value[4] = 0x60;
2117                 value[5] = 0x00;        //0x0060 -> 96 Input video h offset
2118                 value[6] = 0x16;
2119                 value[7] = 0x00;        //0x0016 -> 22 Input video v offset
2120         } else if (usbvision->tvnormId & V4L2_STD_SECAM) {
2121                 value[0] = 0xC0;
2122                 value[1] = 0x02;        //0x02C0 -> 704 Input video line length
2123                 value[2] = 0x20;
2124                 value[3] = 0x01;        //0x0120 -> 288 Input video n. of lines
2125                 value[4] = 0x01;
2126                 value[5] = 0x00;        //0x0001 -> 01 Input video h offset
2127                 value[6] = 0x01;
2128                 value[7] = 0x00;        //0x0001 -> 01 Input video v offset
2129         } else {        /* V4L2_STD_NTSC */
2130                 value[0] = 0xD0;
2131                 value[1] = 0x02;        //0x02D0 -> 720 Input video line length
2132                 value[2] = 0xF0;
2133                 value[3] = 0x00;        //0x00F0 -> 240 Input video number of lines
2134                 value[4] = 0x50;
2135                 value[5] = 0x00;        //0x0050 -> 80 Input video h offset
2136                 value[6] = 0x10;
2137                 value[7] = 0x00;        //0x0010 -> 16 Input video v offset
2138         }
2139
2140         if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) {
2141                 value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff;
2142                 value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8;
2143         }
2144
2145         if (adjust_X_Offset != -1) {
2146                 value[4] = adjust_X_Offset & 0xff;
2147                 value[5] = (adjust_X_Offset & 0x0300) >> 8;
2148         }
2149
2150         if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) {
2151                 value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff;
2152                 value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8;
2153         }
2154
2155         if (adjust_Y_Offset != -1) {
2156                 value[6] = adjust_Y_Offset & 0xff;
2157                 value[7] = (adjust_Y_Offset & 0x0300) >> 8;
2158         }
2159
2160         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2161                              USBVISION_OP_CODE, /* USBVISION specific code */
2162                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2163                              (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2164         if (rc < 0) {
2165                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2166                        "reconnect or reload driver.\n", proc, rc);
2167                 return rc;
2168         }
2169
2170
2171         dvi_yuv_value = 0x00;   /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2172
2173         if(usbvision_device_data[usbvision->DevModel].Dvi_yuv_override){
2174                 dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv;
2175         }
2176         else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2177         /* This changes as the fine sync control changes. Further investigation necessary */
2178                 dvi_yuv_value = 0x06;
2179         }
2180
2181         return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value));
2182 }
2183
2184
2185 /*
2186  * usbvision_set_dram_settings()
2187  *
2188  * Set the buffer address needed by the usbvision dram to operate
2189  * This values has been taken with usbsnoop.
2190  *
2191  */
2192
2193 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2194 {
2195         int rc;
2196         unsigned char value[8];
2197
2198         if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2199                 value[0] = 0x42;
2200                 value[1] = 0x71;
2201                 value[2] = 0xff;
2202                 value[3] = 0x00;
2203                 value[4] = 0x98;
2204                 value[5] = 0xe0;
2205                 value[6] = 0x71;
2206                 value[7] = 0xff;
2207                 // UR:  0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte)
2208                 // FDL: 0x00000-0x0E099 =  57498 Words
2209                 // VDW: 0x0E3FF-0x3FFFF
2210         }
2211         else {
2212                 value[0] = 0x42;
2213                 value[1] = 0x00;
2214                 value[2] = 0xff;
2215                 value[3] = 0x00;
2216                 value[4] = 0x00;
2217                 value[5] = 0x00;
2218                 value[6] = 0x00;
2219                 value[7] = 0xff;
2220         }
2221         /* These are the values of the address of the video buffer,
2222          * they have to be loaded into the USBVISION_DRM_PRM1-8
2223          *
2224          * Start address of video output buffer for read:       drm_prm1-2 -> 0x00000
2225          * End address of video output buffer for read:         drm_prm1-3 -> 0x1ffff
2226          * Start address of video frame delay buffer:           drm_prm1-4 -> 0x20000
2227          *    Only used in compressed mode
2228          * End address of video frame delay buffer:             drm_prm1-5-6 -> 0x3ffff
2229          *    Only used in compressed mode
2230          * Start address of video output buffer for write:      drm_prm1-7 -> 0x00000
2231          * End address of video output buffer for write:        drm_prm1-8 -> 0x1ffff
2232          */
2233
2234         if (!USBVISION_IS_OPERATIONAL(usbvision))
2235                 return 0;
2236
2237         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2238                              USBVISION_OP_CODE, /* USBVISION specific code */
2239                              USB_DIR_OUT | USB_TYPE_VENDOR |
2240                              USB_RECIP_ENDPOINT, 0,
2241                              (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2242
2243         if (rc < 0) {
2244                 err("%sERROR=%d", __func__, rc);
2245                 return rc;
2246         }
2247
2248         /* Restart the video buffer logic */
2249         if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2250                                    USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0)
2251                 return rc;
2252         rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2253
2254         return rc;
2255 }
2256
2257 /*
2258  * ()
2259  *
2260  * Power on the device, enables suspend-resume logic
2261  * &  reset the isoc End-Point
2262  *
2263  */
2264
2265 int usbvision_power_on(struct usb_usbvision *usbvision)
2266 {
2267         int errCode = 0;
2268
2269         PDEBUG(DBG_FUNC, "");
2270
2271         usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2272         usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2273                          USBVISION_SSPND_EN | USBVISION_RES2);
2274
2275         usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2276                          USBVISION_SSPND_EN | USBVISION_PWR_VID);
2277         errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2278                                                 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2279         if (errCode == 1) {
2280                 usbvision->power = 1;
2281         }
2282         PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode);
2283         return errCode;
2284 }
2285
2286
2287 /*
2288  * usbvision timer stuff
2289  */
2290
2291 // to call usbvision_power_off from task queue
2292 static void call_usbvision_power_off(struct work_struct *work)
2293 {
2294         struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork);
2295
2296         PDEBUG(DBG_FUNC, "");
2297         if(mutex_lock_interruptible(&usbvision->lock)) {
2298                 return;
2299         }
2300
2301
2302         if(usbvision->user == 0) {
2303                 usbvision_i2c_unregister(usbvision);
2304
2305                 usbvision_power_off(usbvision);
2306                 usbvision->initialized = 0;
2307         }
2308         mutex_unlock(&usbvision->lock);
2309 }
2310
2311 static void usbvision_powerOffTimer(unsigned long data)
2312 {
2313         struct usb_usbvision *usbvision = (void *) data;
2314
2315         PDEBUG(DBG_FUNC, "");
2316         del_timer(&usbvision->powerOffTimer);
2317         INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off);
2318         (void) schedule_work(&usbvision->powerOffWork);
2319 }
2320
2321 void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision)
2322 {
2323         init_timer(&usbvision->powerOffTimer);
2324         usbvision->powerOffTimer.data = (long) usbvision;
2325         usbvision->powerOffTimer.function = usbvision_powerOffTimer;
2326 }
2327
2328 void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision)
2329 {
2330         mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME);
2331 }
2332
2333 void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision)
2334 {
2335         if (timer_pending(&usbvision->powerOffTimer)) {
2336                 del_timer(&usbvision->powerOffTimer);
2337         }
2338 }
2339
2340 /*
2341  * usbvision_begin_streaming()
2342  * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2343  * idea about the rest
2344  */
2345 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2346 {
2347         int errCode = 0;
2348
2349         if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2350                 usbvision_init_compression(usbvision);
2351         }
2352         errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID |
2353                                                                                 usbvision->Vin_Reg2_Preset);
2354         return errCode;
2355 }
2356
2357 /*
2358  * usbvision_restart_isoc()
2359  * Not sure yet if touching here PWR_REG make loose the config
2360  */
2361
2362 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2363 {
2364         int ret;
2365
2366         if (
2367             (ret =
2368              usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2369                               USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0)
2370                 return ret;
2371         if (
2372             (ret =
2373              usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2374                               USBVISION_SSPND_EN | USBVISION_PWR_VID |
2375                               USBVISION_RES2)) < 0)
2376                 return ret;
2377         if (
2378             (ret =
2379              usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2380                               USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2381                                   usbvision->Vin_Reg2_Preset)) < 0) return ret;
2382
2383         /* TODO: schedule timeout */
2384         while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1);
2385
2386         return 0;
2387 }
2388
2389 int usbvision_audio_off(struct usb_usbvision *usbvision)
2390 {
2391         if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2392                 printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n");
2393                 return -1;
2394         }
2395         usbvision->AudioMute = 0;
2396         usbvision->AudioChannel = USBVISION_AUDIO_MUTE;
2397         return 0;
2398 }
2399
2400 int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel)
2401 {
2402         if (!usbvision->AudioMute) {
2403                 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) {
2404                         printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2405                         return -1;
2406                 }
2407         }
2408         usbvision->AudioChannel = AudioChannel;
2409         return 0;
2410 }
2411
2412 int usbvision_setup(struct usb_usbvision *usbvision,int format)
2413 {
2414         usbvision_set_video_format(usbvision, format);
2415         usbvision_set_dram_settings(usbvision);
2416         usbvision_set_compress_params(usbvision);
2417         usbvision_set_input(usbvision);
2418         usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2419         usbvision_restart_isoc(usbvision);
2420
2421         /* cosas del PCM */
2422         return USBVISION_IS_OPERATIONAL(usbvision);
2423 }
2424
2425 int usbvision_set_alternate(struct usb_usbvision *dev)
2426 {
2427         int errCode, prev_alt = dev->ifaceAlt;
2428         int i;
2429
2430         dev->ifaceAlt=0;
2431         for(i=0;i< dev->num_alt; i++)
2432                 if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->ifaceAlt])
2433                         dev->ifaceAlt=i;
2434
2435         if (dev->ifaceAlt != prev_alt) {
2436                 dev->isocPacketSize = dev->alt_max_pkt_size[dev->ifaceAlt];
2437                 PDEBUG(DBG_FUNC,"setting alternate %d with wMaxPacketSize=%u", dev->ifaceAlt,dev->isocPacketSize);
2438                 errCode = usb_set_interface(dev->dev, dev->iface, dev->ifaceAlt);
2439                 if (errCode < 0) {
2440                         err ("cannot change alternate number to %d (error=%i)",
2441                                                         dev->ifaceAlt, errCode);
2442                         return errCode;
2443                 }
2444         }
2445
2446         PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isocPacketSize);
2447
2448         return 0;
2449 }
2450
2451 /*
2452  * usbvision_init_isoc()
2453  *
2454  */
2455 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2456 {
2457         struct usb_device *dev = usbvision->dev;
2458         int bufIdx, errCode, regValue;
2459         int sb_size;
2460
2461         if (!USBVISION_IS_OPERATIONAL(usbvision))
2462                 return -EFAULT;
2463
2464         usbvision->curFrame = NULL;
2465         scratch_reset(usbvision);
2466
2467         /* Alternate interface 1 is is the biggest frame size */
2468         errCode = usbvision_set_alternate(usbvision);
2469         if (errCode < 0) {
2470                 usbvision->last_error = errCode;
2471                 return -EBUSY;
2472         }
2473         sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
2474
2475         regValue = (16 - usbvision_read_reg(usbvision,
2476                                             USBVISION_ALTER_REG)) & 0x0F;
2477
2478         usbvision->usb_bandwidth = regValue >> 1;
2479         PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2480                usbvision->usb_bandwidth);
2481
2482
2483
2484         /* We double buffer the Iso lists */
2485
2486         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2487                 int j, k;
2488                 struct urb *urb;
2489
2490                 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2491                 if (urb == NULL) {
2492                         err("%s: usb_alloc_urb() failed", __func__);
2493                         return -ENOMEM;
2494                 }
2495                 usbvision->sbuf[bufIdx].urb = urb;
2496                 usbvision->sbuf[bufIdx].data =
2497                         usb_buffer_alloc(usbvision->dev,
2498                                          sb_size,
2499                                          GFP_KERNEL,
2500                                          &urb->transfer_dma);
2501                 urb->dev = dev;
2502                 urb->context = usbvision;
2503                 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2504                 urb->transfer_flags = URB_ISO_ASAP;
2505                 urb->interval = 1;
2506                 urb->transfer_buffer = usbvision->sbuf[bufIdx].data;
2507                 urb->complete = usbvision_isocIrq;
2508                 urb->number_of_packets = USBVISION_URB_FRAMES;
2509                 urb->transfer_buffer_length =
2510                     usbvision->isocPacketSize * USBVISION_URB_FRAMES;
2511                 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2512                      k += usbvision->isocPacketSize) {
2513                         urb->iso_frame_desc[j].offset = k;
2514                         urb->iso_frame_desc[j].length =
2515                                 usbvision->isocPacketSize;
2516                 }
2517         }
2518
2519         /* Submit all URBs */
2520         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2521                         errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb,
2522                                                  GFP_KERNEL);
2523                 if (errCode) {
2524                         err("%s: usb_submit_urb(%d) failed: error %d",
2525                             __func__, bufIdx, errCode);
2526                 }
2527         }
2528
2529         usbvision->streaming = Stream_Idle;
2530         PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x",
2531                __func__,
2532                usbvision->video_endp);
2533         return 0;
2534 }
2535
2536 /*
2537  * usbvision_stop_isoc()
2538  *
2539  * This procedure stops streaming and deallocates URBs. Then it
2540  * activates zero-bandwidth alt. setting of the video interface.
2541  *
2542  */
2543 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2544 {
2545         int bufIdx, errCode, regValue;
2546         int sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
2547
2548         if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL))
2549                 return;
2550
2551         /* Unschedule all of the iso td's */
2552         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2553                 usb_kill_urb(usbvision->sbuf[bufIdx].urb);
2554                 if (usbvision->sbuf[bufIdx].data){
2555                         usb_buffer_free(usbvision->dev,
2556                                         sb_size,
2557                                         usbvision->sbuf[bufIdx].data,
2558                                         usbvision->sbuf[bufIdx].urb->transfer_dma);
2559                 }
2560                 usb_free_urb(usbvision->sbuf[bufIdx].urb);
2561                 usbvision->sbuf[bufIdx].urb = NULL;
2562         }
2563
2564         PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __func__);
2565         usbvision->streaming = Stream_Off;
2566
2567         if (!usbvision->remove_pending) {
2568
2569                 /* Set packet size to 0 */
2570                 usbvision->ifaceAlt=0;
2571                 errCode = usb_set_interface(usbvision->dev, usbvision->iface,
2572                                             usbvision->ifaceAlt);
2573                 if (errCode < 0) {
2574                         err("%s: usb_set_interface() failed: error %d",
2575                             __func__, errCode);
2576                         usbvision->last_error = errCode;
2577                 }
2578                 regValue = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2579                 usbvision->isocPacketSize =
2580                         (regValue == 0) ? 0 : (regValue * 64) - 1;
2581                 PDEBUG(DBG_ISOC, "ISO Packet Length:%d",
2582                        usbvision->isocPacketSize);
2583
2584                 usbvision->usb_bandwidth = regValue >> 1;
2585                 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2586                        usbvision->usb_bandwidth);
2587         }
2588 }
2589
2590 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2591 {
2592         /* inputs #0 and #3 are constant for every SAA711x. */
2593         /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */
2594         int mode[4]= {SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3};
2595         int audio[]= {1, 0, 0, 0};
2596         struct v4l2_routing route;
2597         //channel 0 is TV with audiochannel 1 (tuner mono)
2598         //channel 1 is Composite with audio channel 0 (line in)
2599         //channel 2 is S-Video with audio channel 0 (line in)
2600         //channel 3 is additional video inputs to the device with audio channel 0 (line in)
2601
2602         RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2603         usbvision->ctl_input = channel;
2604
2605         // set the new channel
2606         // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video
2607         // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red
2608
2609         switch (usbvision_device_data[usbvision->DevModel].Codec) {
2610                 case CODEC_SAA7113:
2611                         mode[1] = SAA7115_COMPOSITE2;
2612                         if (SwitchSVideoInput) {
2613                                 /* To handle problems with S-Video Input for
2614                                  * some devices.  Use SwitchSVideoInput
2615                                  * parameter when loading the module.*/
2616                                 mode[2] = SAA7115_COMPOSITE1;
2617                         }
2618                         else {
2619                                 mode[2] = SAA7115_SVIDEO1;
2620                         }
2621                         break;
2622                 case CODEC_SAA7111:
2623                 default:
2624                         /* modes for saa7111 */
2625                         mode[1] = SAA7115_COMPOSITE1;
2626                         mode[2] = SAA7115_SVIDEO1;
2627                         break;
2628         }
2629         route.input = mode[channel];
2630         route.output = 0;
2631         call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
2632         usbvision_set_audio(usbvision, audio[channel]);
2633         return 0;
2634 }
2635
2636 /*
2637  * Overrides for Emacs so that we follow Linus's tabbing style.
2638  * ---------------------------------------------------------------------------
2639  * Local variables:
2640  * c-basic-offset: 8
2641  * End:
2642  */