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