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