SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/media/video/usbvision/usbvision-core.c

   1 /*
   2  * usbvision-core.c - driver for NT100x USB video capture devices
   3  *
   4  *
   5  * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
   6  *                         Dwaine Garden <dwainegarden@rogers.com>
   7  *
   8  * This module is part of usbvision driver project.
   9  * Updates to driver completed by Dwaine P. Garden
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/sched.h>
  28 #include <linux/list.h>
  29 #include <linux/timer.h>
  30 #include <linux/slab.h>
  31 #include <linux/mm.h>
  32 #include <linux/utsname.h>
  33 #include <linux/highmem.h>
  34 #include <linux/smp_lock.h>
  35 #include <linux/videodev.h>
  36 #include <linux/vmalloc.h>
  37 #include <linux/module.h>
  38 #include <linux/init.h>
  39 #include <linux/spinlock.h>
  40 #include <asm/io.h>
  41 #include <linux/videodev2.h>
  42 #include <linux/video_decoder.h>
  43 #include <linux/i2c.h>
  44
  45 #include <media/saa7115.h>
  46 #include <media/v4l2-common.h>
  47 #include <media/tuner.h>
  48 #include <media/audiochip.h>
  49
  50 #include <linux/moduleparam.h>
  51 #include <linux/workqueue.h>
  52
  53 #ifdef CONFIG_KMOD
  54 #include <linux/kmod.h>
  55 #endif
  56
  57 #include "usbvision.h"
  58
  59 static unsigned int core_debug = 0;
  60 module_param(core_debug,int,0644);
  61 MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
  62
  63 static unsigned int force_testpattern = 0;
  64 module_param(force_testpattern,int,0644);
  65 MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]");
  66
  67 static int adjustCompression = 1;                       // Set the compression to be adaptive
  68 module_param(adjustCompression, int, 0444);
  69 MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device.  Default: 1 (On)");
  70
  71 static int SwitchSVideoInput = 0;                       // To help people with Black and White output with using s-video input.  Some cables and input device are wired differently.
  72 module_param(SwitchSVideoInput, int, 0444);
  73 MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input.  Some cables and input device are wired differently. Default: 0 (Off)");
  74
  75 #define ENABLE_HEXDUMP  0       /* Enable if you need it */
  76
  77
  78 #ifdef USBVISION_DEBUG
  79         #define PDEBUG(level, fmt, args...) \
  80                 if (core_debug & (level)) info("[%s:%d] " fmt, __PRETTY_FUNCTION__, __LINE__ , ## args)
  81 #else
  82         #define PDEBUG(level, fmt, args...) do {} while(0)
  83 #endif
  84
  85 #define DBG_HEADER      1<<0
  86 #define DBG_IRQ         1<<1
  87 #define DBG_ISOC        1<<2
  88 #define DBG_PARSE       1<<3
  89 #define DBG_SCRATCH     1<<4
  90
  91 static const int max_imgwidth = MAX_FRAME_WIDTH;
  92 static const int max_imgheight = MAX_FRAME_HEIGHT;
  93 static const int min_imgwidth = MIN_FRAME_WIDTH;
  94 static const int min_imgheight = MIN_FRAME_HEIGHT;
  95
  96 /* The value of 'scratch_buf_size' affects quality of the picture
  97  * in many ways. Shorter buffers may cause loss of data when client
  98  * is too slow. Larger buffers are memory-consuming and take longer
  99  * to work with. This setting can be adjusted, but the default value
 100  * should be OK for most desktop users.
 101  */
 102 #define DEFAULT_SCRATCH_BUF_SIZE        (0x20000)               // 128kB memory scratch buffer
 103 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
 104
 105 // Function prototypes
 106 static int usbvision_request_intra (struct usb_usbvision *usbvision);
 107 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision);
 108 static int usbvision_adjust_compression (struct usb_usbvision *usbvision);
 109 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision);
 110
 111 /*******************************/
 112 /* Memory management functions */
 113 /*******************************/
 114
 115 /*
 116  * Here we want the physical address of the memory.
 117  * This is used when initializing the contents of the area.
 118  */
 119
 120 void *usbvision_rvmalloc(unsigned long size)
 121 {
 122         void *mem;
 123         unsigned long adr;
 124
 125         size = PAGE_ALIGN(size);
 126         mem = vmalloc_32(size);
 127         if (!mem)
 128                 return NULL;
 129
 130         memset(mem, 0, size); /* Clear the ram out, no junk to the user */
 131         adr = (unsigned long) mem;
 132         while (size > 0) {
 133                 SetPageReserved(vmalloc_to_page((void *)adr));
 134                 adr += PAGE_SIZE;
 135                 size -= PAGE_SIZE;
 136         }
 137
 138         return mem;
 139 }
 140
 141 void usbvision_rvfree(void *mem, unsigned long size)
 142 {
 143         unsigned long adr;
 144
 145         if (!mem)
 146                 return;
 147
 148         size = PAGE_ALIGN(size);
 149
 150         adr = (unsigned long) mem;
 151         while ((long) size > 0) {
 152                 ClearPageReserved(vmalloc_to_page((void *)adr));
 153                 adr += PAGE_SIZE;
 154                 size -= PAGE_SIZE;
 155         }
 156
 157         vfree(mem);
 158 }
 159
 160
 161
 162 #if ENABLE_HEXDUMP
 163 static void usbvision_hexdump(const unsigned char *data, int len)
 164 {
 165         char tmp[80];
 166         int i, k;
 167
 168         for (i = k = 0; len > 0; i++, len--) {
 169                 if (i > 0 && (i % 16 == 0)) {
 170                         printk("%s\n", tmp);
 171                         k = 0;
 172                 }
 173                 k += sprintf(&tmp[k], "%02x ", data[i]);
 174         }
 175         if (k > 0)
 176                 printk("%s\n", tmp);
 177 }
 178 #endif
 179
 180 /********************************
 181  * scratch ring buffer handling
 182  ********************************/
 183 int scratch_len(struct usb_usbvision *usbvision)    /*This returns the amount of data actually in the buffer */
 184 {
 185         int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
 186         if (len < 0) {
 187                 len += scratch_buf_size;
 188         }
 189         PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
 190
 191         return len;
 192 }
 193
 194
 195 /* This returns the free space left in the buffer */
 196 int scratch_free(struct usb_usbvision *usbvision)
 197 {
 198         int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
 199         if (free <= 0) {
 200                 free += scratch_buf_size;
 201         }
 202         if (free) {
 203                 free -= 1;                                                      /* at least one byte in the buffer must */
 204                                                                                 /* left blank, otherwise there is no chance to differ between full and empty */
 205         }
 206         PDEBUG(DBG_SCRATCH, "return %d\n", free);
 207
 208         return free;
 209 }
 210
 211
 212 /* This puts data into the buffer */
 213 int scratch_put(struct usb_usbvision *usbvision, unsigned char *data, int len)
 214 {
 215         int len_part;
 216
 217         if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
 218                 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
 219                 usbvision->scratch_write_ptr += len;
 220         }
 221         else {
 222                 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
 223                 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
 224                 if (len == len_part) {
 225                         usbvision->scratch_write_ptr = 0;                       /* just set write_ptr to zero */
 226                 }
 227                 else {
 228                         memcpy(usbvision->scratch, data + len_part, len - len_part);
 229                         usbvision->scratch_write_ptr = len - len_part;
 230                 }
 231         }
 232
 233         PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
 234
 235         return len;
 236 }
 237
 238 /* This marks the write_ptr as position of new frame header */
 239 void scratch_mark_header(struct usb_usbvision *usbvision)
 240 {
 241         PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
 242
 243         usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
 244                                 usbvision->scratch_write_ptr;
 245         usbvision->scratch_headermarker_write_ptr += 1;
 246         usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
 247 }
 248
 249 /* This gets data from the buffer at the given "ptr" position */
 250 int scratch_get_extra(struct usb_usbvision *usbvision, unsigned char *data, int *ptr, int len)
 251 {
 252         int len_part;
 253         if (*ptr + len < scratch_buf_size) {
 254                 memcpy(data, usbvision->scratch + *ptr, len);
 255                 *ptr += len;
 256         }
 257         else {
 258                 len_part = scratch_buf_size - *ptr;
 259                 memcpy(data, usbvision->scratch + *ptr, len_part);
 260                 if (len == len_part) {
 261                         *ptr = 0;                                                       /* just set the y_ptr to zero */
 262                 }
 263                 else {
 264                         memcpy(data + len_part, usbvision->scratch, len - len_part);
 265                         *ptr = len - len_part;
 266                 }
 267         }
 268
 269         PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
 270
 271         return len;
 272 }
 273
 274
 275 /* This sets the scratch extra read pointer */
 276 void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr, int len)
 277 {
 278         *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size;
 279
 280         PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
 281 }
 282
 283
 284 /*This increments the scratch extra read pointer */
 285 void scratch_inc_extra_ptr(int *ptr, int len)
 286 {
 287         *ptr = (*ptr + len) % scratch_buf_size;
 288
 289         PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
 290 }
 291
 292
 293 /* This gets data from the buffer */
 294 int scratch_get(struct usb_usbvision *usbvision, unsigned char *data, int len)
 295 {
 296         int len_part;
 297         if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
 298                 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
 299                 usbvision->scratch_read_ptr += len;
 300         }
 301         else {
 302                 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
 303                 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
 304                 if (len == len_part) {
 305                         usbvision->scratch_read_ptr = 0;                                /* just set the read_ptr to zero */
 306                 }
 307                 else {
 308                         memcpy(data + len_part, usbvision->scratch, len - len_part);
 309                         usbvision->scratch_read_ptr = len - len_part;
 310                 }
 311         }
 312
 313         PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
 314
 315         return len;
 316 }
 317
 318
 319 /* This sets read pointer to next header and returns it */
 320 int scratch_get_header(struct usb_usbvision *usbvision,struct usbvision_frame_header *header)
 321 {
 322         int errCode = 0;
 323
 324         PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
 325
 326         while (usbvision->scratch_headermarker_write_ptr -
 327                 usbvision->scratch_headermarker_read_ptr != 0) {
 328                 usbvision->scratch_read_ptr =
 329                         usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
 330                 usbvision->scratch_headermarker_read_ptr += 1;
 331                 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
 332                 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
 333                 if ((header->magic_1 == USBVISION_MAGIC_1)
 334                          && (header->magic_2 == USBVISION_MAGIC_2)
 335                          && (header->headerLength == USBVISION_HEADER_LENGTH)) {
 336                         errCode = USBVISION_HEADER_LENGTH;
 337                         header->frameWidth  = header->frameWidthLo  + (header->frameWidthHi << 8);
 338                         header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8);
 339                         break;
 340                 }
 341         }
 342
 343         return errCode;
 344 }
 345
 346
 347 /*This removes len bytes of old data from the buffer */
 348 void scratch_rm_old(struct usb_usbvision *usbvision, int len)
 349 {
 350
 351         usbvision->scratch_read_ptr += len;
 352         usbvision->scratch_read_ptr %= scratch_buf_size;
 353         PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
 354 }
 355
 356
 357 /*This resets the buffer - kills all data in it too */
 358 void scratch_reset(struct usb_usbvision *usbvision)
 359 {
 360         PDEBUG(DBG_SCRATCH, "\n");
 361
 362         usbvision->scratch_read_ptr = 0;
 363         usbvision->scratch_write_ptr = 0;
 364         usbvision->scratch_headermarker_read_ptr = 0;
 365         usbvision->scratch_headermarker_write_ptr = 0;
 366         usbvision->isocstate = IsocState_NoFrame;
 367 }
 368
 369 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
 370 {
 371         usbvision->scratch = vmalloc(scratch_buf_size);
 372         scratch_reset(usbvision);
 373         if(usbvision->scratch == NULL) {
 374                 err("%s: unable to allocate %d bytes for scratch",
 375                     __FUNCTION__, scratch_buf_size);
 376                 return -ENOMEM;
 377         }
 378         return 0;
 379 }
 380
 381 void usbvision_scratch_free(struct usb_usbvision *usbvision)
 382 {
 383         if (usbvision->scratch != NULL) {
 384                 vfree(usbvision->scratch);
 385                 usbvision->scratch = NULL;
 386         }
 387 }
 388
 389 /*
 390  * usbvision_testpattern()
 391  *
 392  * Procedure forms a test pattern (yellow grid on blue background).
 393  *
 394  * Parameters:
 395  * fullframe:   if TRUE then entire frame is filled, otherwise the procedure
 396  *              continues from the current scanline.
 397  * pmode        0: fill the frame with solid blue color (like on VCR or TV)
 398  *              1: Draw a colored grid
 399  *
 400  */
 401 void usbvision_testpattern(struct usb_usbvision *usbvision, int fullframe,
 402                         int pmode)
 403 {
 404         static const char proc[] = "usbvision_testpattern";
 405         struct usbvision_frame *frame;
 406         unsigned char *f;
 407         int num_cell = 0;
 408         int scan_length = 0;
 409         static int num_pass = 0;
 410
 411         if (usbvision == NULL) {
 412                 printk(KERN_ERR "%s: usbvision == NULL\n", proc);
 413                 return;
 414         }
 415         if (usbvision->curFrame == NULL) {
 416                 printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc);
 417                 return;
 418         }
 419
 420         /* Grab the current frame */
 421         frame = usbvision->curFrame;
 422
 423         /* Optionally start at the beginning */
 424         if (fullframe) {
 425                 frame->curline = 0;
 426                 frame->scanlength = 0;
 427         }
 428
 429         /* Form every scan line */
 430         for (; frame->curline < frame->frmheight; frame->curline++) {
 431                 int i;
 432
 433                 f = frame->data + (usbvision->curwidth * 3 * frame->curline);
 434                 for (i = 0; i < usbvision->curwidth; i++) {
 435                         unsigned char cb = 0x80;
 436                         unsigned char cg = 0;
 437                         unsigned char cr = 0;
 438
 439                         if (pmode == 1) {
 440                                 if (frame->curline % 32 == 0)
 441                                         cb = 0, cg = cr = 0xFF;
 442                                 else if (i % 32 == 0) {
 443                                         if (frame->curline % 32 == 1)
 444                                                 num_cell++;
 445                                         cb = 0, cg = cr = 0xFF;
 446                                 } else {
 447                                         cb =
 448                                             ((num_cell * 7) +
 449                                              num_pass) & 0xFF;
 450                                         cg =
 451                                             ((num_cell * 5) +
 452                                              num_pass * 2) & 0xFF;
 453                                         cr =
 454                                             ((num_cell * 3) +
 455                                              num_pass * 3) & 0xFF;
 456                                 }
 457                         } else {
 458                                 /* Just the blue screen */
 459                         }
 460
 461                         *f++ = cb;
 462                         *f++ = cg;
 463                         *f++ = cr;
 464                         scan_length += 3;
 465                 }
 466         }
 467
 468         frame->grabstate = FrameState_Done;
 469         frame->scanlength += scan_length;
 470         ++num_pass;
 471
 472 }
 473
 474 /*
 475  * usbvision_decompress_alloc()
 476  *
 477  * allocates intermediate buffer for decompression
 478  */
 479 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
 480 {
 481         int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
 482         usbvision->IntraFrameBuffer = vmalloc(IFB_size);
 483         if (usbvision->IntraFrameBuffer == NULL) {
 484                 err("%s: unable to allocate %d for compr. frame buffer", __FUNCTION__, IFB_size);
 485                 return -ENOMEM;
 486         }
 487         return 0;
 488 }
 489
 490 /*
 491  * usbvision_decompress_free()
 492  *
 493  * frees intermediate buffer for decompression
 494  */
 495 void usbvision_decompress_free(struct usb_usbvision *usbvision)
 496 {
 497         if (usbvision->IntraFrameBuffer != NULL) {
 498                 vfree(usbvision->IntraFrameBuffer);
 499                 usbvision->IntraFrameBuffer = NULL;
 500         }
 501 }
 502
 503 /************************************************************
 504  * Here comes the data parsing stuff that is run as interrupt
 505  ************************************************************/
 506 /*
 507  * usbvision_find_header()
 508  *
 509  * Locate one of supported header markers in the scratch buffer.
 510  */
 511 static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision)
 512 {
 513         struct usbvision_frame *frame;
 514         int foundHeader = 0;
 515
 516         frame = usbvision->curFrame;
 517
 518         while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) {
 519                 // found header in scratch
 520                 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
 521                                 frame->isocHeader.magic_2,
 522                                 frame->isocHeader.magic_1,
 523                                 frame->isocHeader.headerLength,
 524                                 frame->isocHeader.frameNum,
 525                                 frame->isocHeader.framePhase,
 526                                 frame->isocHeader.frameLatency,
 527                                 frame->isocHeader.dataFormat,
 528                                 frame->isocHeader.formatParam,
 529                                 frame->isocHeader.frameWidth,
 530                                 frame->isocHeader.frameHeight);
 531
 532                 if (usbvision->requestIntra) {
 533                         if (frame->isocHeader.formatParam & 0x80) {
 534                                 foundHeader = 1;
 535                                 usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time
 536                                 usbvision_unrequest_intra(usbvision);
 537                                 break;
 538                         }
 539                 }
 540                 else {
 541                         foundHeader = 1;
 542                         break;
 543                 }
 544         }
 545
 546         if (foundHeader) {
 547                 frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width;
 548                 frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height;
 549                 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3;
 550         }
 551         else { // no header found
 552                 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
 553                 scratch_reset(usbvision);
 554                 return ParseState_EndParse;
 555         }
 556
 557         // found header
 558         if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) {
 559                 //check isocHeader.frameNum for lost frames
 560                 if (usbvision->lastIsocFrameNum >= 0) {
 561                         if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) {
 562                                 // unexpected frame drop: need to request new intra frame
 563                                 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum);
 564                                 usbvision_request_intra(usbvision);
 565                                 return ParseState_NextFrame;
 566                         }
 567                 }
 568                 usbvision->lastIsocFrameNum = frame->isocHeader.frameNum;
 569         }
 570         usbvision->header_count++;
 571         frame->scanstate = ScanState_Lines;
 572         frame->curline = 0;
 573
 574         if (force_testpattern) {
 575                 usbvision_testpattern(usbvision, 1, 1);
 576                 return ParseState_NextFrame;
 577         }
 578         return ParseState_Continue;
 579 }
 580
 581 static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision,
 582                                            long *pcopylen)
 583 {
 584         volatile struct usbvision_frame *frame;
 585         unsigned char *f;
 586         int len;
 587         int i;
 588         unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components
 589         unsigned char rv, gv, bv;       // RGB components
 590         int clipmask_index, bytes_per_pixel;
 591         int stretch_bytes, clipmask_add;
 592
 593         frame  = usbvision->curFrame;
 594         f = frame->data + (frame->v4l2_linesize * frame->curline);
 595
 596         /* Make sure there's enough data for the entire line */
 597         len = (frame->isocHeader.frameWidth * 2)+5;
 598         if (scratch_len(usbvision) < len) {
 599                 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
 600                 return ParseState_Out;
 601         }
 602
 603         if ((frame->curline + 1) >= frame->frmheight) {
 604                 return ParseState_NextFrame;
 605         }
 606
 607         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
 608         stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
 609         clipmask_index = frame->curline * MAX_FRAME_WIDTH;
 610         clipmask_add = usbvision->stretch_width;
 611
 612         for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) {
 613
 614                 scratch_get(usbvision, &yuyv[0], 4);
 615
 616                 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 617                         *f++ = yuyv[0]; // Y
 618                         *f++ = yuyv[3]; // U
 619                 }
 620                 else {
 621
 622                         YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
 623                         switch (frame->v4l2_format.format) {
 624                                 case V4L2_PIX_FMT_RGB565:
 625                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
 626                                         *f++ = (0x07 & (gv >> 5)) | (0xF8 &  rv);
 627                                         break;
 628                                 case V4L2_PIX_FMT_RGB24:
 629                                         *f++ = bv;
 630                                         *f++ = gv;
 631                                         *f++ = rv;
 632                                         break;
 633                                 case V4L2_PIX_FMT_RGB32:
 634                                         *f++ = bv;
 635                                         *f++ = gv;
 636                                         *f++ = rv;
 637                                         f++;
 638                                         break;
 639                                 case V4L2_PIX_FMT_RGB555:
 640                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
 641                                         *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
 642                                         break;
 643                         }
 644                 }
 645                 clipmask_index += clipmask_add;
 646                 f += stretch_bytes;
 647
 648                 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 649                         *f++ = yuyv[2]; // Y
 650                         *f++ = yuyv[1]; // V
 651                 }
 652                 else {
 653
 654                         YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
 655                         switch (frame->v4l2_format.format) {
 656                                 case V4L2_PIX_FMT_RGB565:
 657                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
 658                                         *f++ = (0x07 & (gv >> 5)) | (0xF8 &  rv);
 659                                         break;
 660                                 case V4L2_PIX_FMT_RGB24:
 661                                         *f++ = bv;
 662                                         *f++ = gv;
 663                                         *f++ = rv;
 664                                         break;
 665                                 case V4L2_PIX_FMT_RGB32:
 666                                         *f++ = bv;
 667                                         *f++ = gv;
 668                                         *f++ = rv;
 669                                         f++;
 670                                         break;
 671                                 case V4L2_PIX_FMT_RGB555:
 672                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
 673                                         *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
 674                                         break;
 675                         }
 676                 }
 677                 clipmask_index += clipmask_add;
 678                 f += stretch_bytes;
 679         }
 680
 681         frame->curline += usbvision->stretch_height;
 682         *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
 683
 684         if (frame->curline >= frame->frmheight) {
 685                 return ParseState_NextFrame;
 686         }
 687         else {
 688                 return ParseState_Continue;
 689         }
 690 }
 691
 692 /* The decompression routine  */
 693 static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed,
 694                                                                 unsigned char *Decompressed, int *StartPos,
 695                                                                 int *BlockTypeStartPos, int Len)
 696 {
 697         int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen;
 698         unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator;
 699
 700         Integrator = 0;
 701         Pos = *StartPos;
 702         BlockTypePos = *BlockTypeStartPos;
 703         MaxPos = 396; //Pos + Len;
 704         ExtraPos = Pos;
 705         BlockLen = 0;
 706         BlockByte = 0;
 707         BlockCode = 0;
 708         BlockType = 0;
 709         BlockTypeByte = 0;
 710         BlockTypeLen = 0;
 711         RestPixel = Len;
 712
 713         for (Idx = 0; Idx < Len; Idx++) {
 714
 715                 if (BlockLen == 0) {
 716                         if (BlockTypeLen==0) {
 717                                 BlockTypeByte = Compressed[BlockTypePos];
 718                                 BlockTypePos++;
 719                                 BlockTypeLen = 4;
 720                         }
 721                         BlockType = (BlockTypeByte & 0xC0) >> 6;
 722
 723                         //statistic:
 724                         usbvision->ComprBlockTypes[BlockType]++;
 725
 726                         Pos = ExtraPos;
 727                         if (BlockType == 0) {
 728                                 if(RestPixel >= 24) {
 729                                         Idx += 23;
 730                                         RestPixel -= 24;
 731                                         Integrator = Decompressed[Idx];
 732                                 } else {
 733                                         Idx += RestPixel - 1;
 734                                         RestPixel = 0;
 735                                 }
 736                         } else {
 737                                 BlockCode = Compressed[Pos];
 738                                 Pos++;
 739                                 if (RestPixel >= 24) {
 740                                         BlockLen  = 24;
 741                                 } else {
 742                                         BlockLen = RestPixel;
 743                                 }
 744                                 RestPixel -= BlockLen;
 745                                 ExtraPos = Pos + (BlockLen / 4);
 746                         }
 747                         BlockTypeByte <<= 2;
 748                         BlockTypeLen -= 1;
 749                 }
 750                 if (BlockLen > 0) {
 751                         if ((BlockLen%4) == 0) {
 752                                 BlockByte = Compressed[Pos];
 753                                 Pos++;
 754                         }
 755                         if (BlockType == 1) { //inter Block
 756                                 Integrator = Decompressed[Idx];
 757                         }
 758                         switch (BlockByte & 0xC0) {
 759                                 case 0x03<<6:
 760                                         Integrator += Compressed[ExtraPos];
 761                                         ExtraPos++;
 762                                         break;
 763                                 case 0x02<<6:
 764                                         Integrator += BlockCode;
 765                                         break;
 766                                 case 0x00:
 767                                         Integrator -= BlockCode;
 768                                         break;
 769                         }
 770                         Decompressed[Idx] = Integrator;
 771                         BlockByte <<= 2;
 772                         BlockLen -= 1;
 773                 }
 774         }
 775         *StartPos = ExtraPos;
 776         *BlockTypeStartPos = BlockTypePos;
 777         return Idx;
 778 }
 779
 780
 781 /*
 782  * usbvision_parse_compress()
 783  *
 784  * Parse compressed frame from the scratch buffer, put
 785  * decoded RGB value into the current frame buffer and add the written
 786  * number of bytes (RGB) to the *pcopylen.
 787  *
 788  */
 789 static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision,
 790                                            long *pcopylen)
 791 {
 792 #define USBVISION_STRIP_MAGIC           0x5A
 793 #define USBVISION_STRIP_LEN_MAX         400
 794 #define USBVISION_STRIP_HEADER_LEN      3
 795
 796         struct usbvision_frame *frame;
 797         unsigned char *f,*u = NULL ,*v = NULL;
 798         unsigned char StripData[USBVISION_STRIP_LEN_MAX];
 799         unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN];
 800         int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos;
 801         int clipmask_index, bytes_per_pixel, rc;
 802         int imageSize;
 803         unsigned char rv, gv, bv;
 804         static unsigned char *Y, *U, *V;
 805
 806         frame  = usbvision->curFrame;
 807         imageSize = frame->frmwidth * frame->frmheight;
 808         if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
 809              (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) {       // this is a planar format
 810                 //... v4l2_linesize not used here.
 811                 f = frame->data + (frame->width * frame->curline);
 812         } else
 813                 f = frame->data + (frame->v4l2_linesize * frame->curline);
 814
 815         if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers
 816                 // get base of u and b planes add halfoffset
 817
 818                 u = frame->data
 819                         + imageSize
 820                         + (frame->frmwidth >>1) * frame->curline ;
 821                 v = u + (imageSize >>1 );
 822
 823         } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){
 824
 825                 v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ;
 826                 u = v + (imageSize >>2) ;
 827         }
 828
 829         if (frame->curline == 0) {
 830                 usbvision_adjust_compression(usbvision);
 831         }
 832
 833         if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) {
 834                 return ParseState_Out;
 835         }
 836
 837         //get strip header without changing the scratch_read_ptr
 838         scratch_set_extra_ptr(usbvision, &StripPtr, 0);
 839         scratch_get_extra(usbvision, &StripHeader[0], &StripPtr,
 840                                 USBVISION_STRIP_HEADER_LEN);
 841
 842         if (StripHeader[0] != USBVISION_STRIP_MAGIC) {
 843                 // wrong strip magic
 844                 usbvision->stripMagicErrors++;
 845                 return ParseState_NextFrame;
 846         }
 847
 848         if (frame->curline != (int)StripHeader[2]) {
 849                 //line number missmatch error
 850                 usbvision->stripLineNumberErrors++;
 851         }
 852
 853         StripLen = 2 * (unsigned int)StripHeader[1];
 854         if (StripLen > USBVISION_STRIP_LEN_MAX) {
 855                 // strip overrun
 856                 // I think this never happens
 857                 usbvision_request_intra(usbvision);
 858         }
 859
 860         if (scratch_len(usbvision) < StripLen) {
 861                 //there is not enough data for the strip
 862                 return ParseState_Out;
 863         }
 864
 865         if (usbvision->IntraFrameBuffer) {
 866                 Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline;
 867                 U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2);
 868                 V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
 869         }
 870         else {
 871                 return ParseState_NextFrame;
 872         }
 873
 874         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
 875         clipmask_index = frame->curline * MAX_FRAME_WIDTH;
 876
 877         scratch_get(usbvision, StripData, StripLen);
 878
 879         IdxEnd = frame->frmwidth;
 880         BlockTypePos = USBVISION_STRIP_HEADER_LEN;
 881         StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2;
 882         BlockPos = StartBlockPos;
 883
 884         usbvision->BlockPos = BlockPos;
 885
 886         if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) {
 887                 //return ParseState_Continue;
 888         }
 889         if (StripLen > usbvision->maxStripLen) {
 890                 usbvision->maxStripLen = StripLen;
 891         }
 892
 893         if (frame->curline%2) {
 894                 if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
 895                 //return ParseState_Continue;
 896                 }
 897         }
 898         else {
 899                 if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
 900                         //return ParseState_Continue;
 901                 }
 902         }
 903
 904         if (BlockPos > usbvision->comprBlockPos) {
 905                 usbvision->comprBlockPos = BlockPos;
 906         }
 907         if (BlockPos > StripLen) {
 908                 usbvision->stripLenErrors++;
 909         }
 910
 911         for (Idx = 0; Idx < IdxEnd; Idx++) {
 912                 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 913                         *f++ = Y[Idx];
 914                         *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2];
 915                 }
 916                 else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
 917                         *f++ = Y[Idx];
 918                         if ( Idx & 0x01)
 919                                 *u++ = U[Idx>>1] ;
 920                         else
 921                                 *v++ = V[Idx>>1];
 922                 }
 923                 else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
 924                         *f++ = Y [Idx];
 925                         if ( !((  Idx & 0x01  ) | (  frame->curline & 0x01  )) ){
 926
 927 /*                               only need do this for 1 in 4 pixels */
 928 /*                               intraframe buffer is YUV420 format */
 929
 930                                 *u++ = U[Idx >>1];
 931                                 *v++ = V[Idx >>1];
 932                         }
 933
 934                 }
 935                 else {
 936                         YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv);
 937                         switch (frame->v4l2_format.format) {
 938                                 case V4L2_PIX_FMT_GREY:
 939                                         *f++ = Y[Idx];
 940                                         break;
 941                                 case V4L2_PIX_FMT_RGB555:
 942                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
 943                                         *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
 944                                         break;
 945                                 case V4L2_PIX_FMT_RGB565:
 946                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
 947                                         *f++ = (0x07 & (gv >> 5)) | (0xF8 &  rv);
 948                                         break;
 949                                 case V4L2_PIX_FMT_RGB24:
 950                                         *f++ = bv;
 951                                         *f++ = gv;
 952                                         *f++ = rv;
 953                                         break;
 954                                 case V4L2_PIX_FMT_RGB32:
 955                                         *f++ = bv;
 956                                         *f++ = gv;
 957                                         *f++ = rv;
 958                                         f++;
 959                                         break;
 960                         }
 961                 }
 962                 clipmask_index++;
 963         }
 964         /* Deal with non-integer no. of bytes for YUV420P */
 965         if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 )
 966                 *pcopylen += frame->v4l2_linesize;
 967         else
 968                 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
 969
 970         frame->curline += 1;
 971
 972         if (frame->curline >= frame->frmheight) {
 973                 return ParseState_NextFrame;
 974         }
 975         else {
 976                 return ParseState_Continue;
 977         }
 978
 979 }
 980
 981
 982 /*
 983  * usbvision_parse_lines_420()
 984  *
 985  * Parse two lines from the scratch buffer, put
 986  * decoded RGB value into the current frame buffer and add the written
 987  * number of bytes (RGB) to the *pcopylen.
 988  *
 989  */
 990 static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision,
 991                                            long *pcopylen)
 992 {
 993         struct usbvision_frame *frame;
 994         unsigned char *f_even = NULL, *f_odd = NULL;
 995         unsigned int pixel_per_line, block;
 996         int pixel, block_split;
 997         int y_ptr, u_ptr, v_ptr, y_odd_offset;
 998         const int   y_block_size = 128;
 999         const int  uv_block_size = 64;
1000         const int sub_block_size = 32;
1001         const int y_step[] = { 0, 0, 0, 2 },  y_step_size = 4;
1002         const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4;
1003         unsigned char y[2], u, v;       /* YUV components */
1004         int y_, u_, v_, vb, uvg, ur;
1005         int r_, g_, b_;                 /* RGB components */
1006         unsigned char g;
1007         int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
1008         int clipmask_add, stretch_bytes;
1009
1010         frame  = usbvision->curFrame;
1011         f_even = frame->data + (frame->v4l2_linesize * frame->curline);
1012         f_odd  = f_even + frame->v4l2_linesize * usbvision->stretch_height;
1013
1014         /* Make sure there's enough data for the entire line */
1015         /* In this mode usbvision transfer 3 bytes for every 2 pixels */
1016         /* I need two lines to decode the color */
1017         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
1018         stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
1019         clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
1020         clipmask_odd_index  = clipmask_even_index + MAX_FRAME_WIDTH;
1021         clipmask_add = usbvision->stretch_width;
1022         pixel_per_line = frame->isocHeader.frameWidth;
1023
1024         if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
1025                 //printk(KERN_DEBUG "out of data, need %d\n", len);
1026                 return ParseState_Out;
1027         }
1028
1029         if ((frame->curline + 1) >= frame->frmheight) {
1030                 return ParseState_NextFrame;
1031         }
1032
1033         block_split = (pixel_per_line%y_block_size) ? 1 : 0;    //are some blocks splitted into different lines?
1034
1035         y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
1036                         + block_split * uv_block_size;
1037
1038         scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
1039         scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
1040         scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
1041                         + (4 - block_split) * sub_block_size);
1042
1043         for (block = 0; block < (pixel_per_line / sub_block_size);
1044              block++) {
1045
1046
1047                 for (pixel = 0; pixel < sub_block_size; pixel +=2) {
1048                         scratch_get(usbvision, &y[0], 2);
1049                         scratch_get_extra(usbvision, &u, &u_ptr, 1);
1050                         scratch_get_extra(usbvision, &v, &v_ptr, 1);
1051
1052                         //I don't use the YUV_TO_RGB macro for better performance
1053                         v_ = v - 128;
1054                         u_ = u - 128;
1055                         vb =              132252 * v_;
1056                         uvg= -53281 * u_ - 25625 * v_;
1057                         ur = 104595 * u_;
1058
1059                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1060                                 *f_even++ = y[0];
1061                                 *f_even++ = v;
1062                         }
1063                         else {
1064                                 y_ = 76284 * (y[0] - 16);
1065
1066                                 b_ = (y_ + vb) >> 16;
1067                                 g_ = (y_ + uvg)>> 16;
1068                                 r_ = (y_ + ur) >> 16;
1069
1070                                 switch (frame->v4l2_format.format) {
1071                                         case V4L2_PIX_FMT_RGB565:
1072                                                 g = LIMIT_RGB(g_);
1073                                                 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1074                                                 *f_even++ = (0x07 & (          g   >> 5)) | (0xF8 & LIMIT_RGB(r_));
1075                                                 break;
1076                                         case V4L2_PIX_FMT_RGB24:
1077                                                 *f_even++ = LIMIT_RGB(b_);
1078                                                 *f_even++ = LIMIT_RGB(g_);
1079                                                 *f_even++ = LIMIT_RGB(r_);
1080                                                 break;
1081                                         case V4L2_PIX_FMT_RGB32:
1082                                                 *f_even++ = LIMIT_RGB(b_);
1083                                                 *f_even++ = LIMIT_RGB(g_);
1084                                                 *f_even++ = LIMIT_RGB(r_);
1085                                                 f_even++;
1086                                                 break;
1087                                         case V4L2_PIX_FMT_RGB555:
1088                                                 g = LIMIT_RGB(g_);
1089                                                 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1090                                                 *f_even++ = (0x03 & (          g   >> 6)) |
1091                                                             (0x7C & (LIMIT_RGB(r_) >> 1));
1092                                                 break;
1093                                 }
1094                         }
1095                         clipmask_even_index += clipmask_add;
1096                         f_even += stretch_bytes;
1097
1098                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1099                                 *f_even++ = y[1];
1100                                 *f_even++ = u;
1101                         }
1102                         else {
1103                                 y_ = 76284 * (y[1] - 16);
1104
1105                                 b_ = (y_ + vb) >> 16;
1106                                 g_ = (y_ + uvg)>> 16;
1107                                 r_ = (y_ + ur) >> 16;
1108
1109                                 switch (frame->v4l2_format.format) {
1110                                         case V4L2_PIX_FMT_RGB565:
1111                                                 g = LIMIT_RGB(g_);
1112                                                 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1113                                                 *f_even++ = (0x07 & (          g   >> 5)) | (0xF8 & LIMIT_RGB(r_));
1114                                                 break;
1115                                         case V4L2_PIX_FMT_RGB24:
1116                                                 *f_even++ = LIMIT_RGB(b_);
1117                                                 *f_even++ = LIMIT_RGB(g_);
1118                                                 *f_even++ = LIMIT_RGB(r_);
1119                                                 break;
1120                                         case V4L2_PIX_FMT_RGB32:
1121                                                 *f_even++ = LIMIT_RGB(b_);
1122                                                 *f_even++ = LIMIT_RGB(g_);
1123                                                 *f_even++ = LIMIT_RGB(r_);
1124                                                 f_even++;
1125                                                 break;
1126                                         case V4L2_PIX_FMT_RGB555:
1127                                                 g = LIMIT_RGB(g_);
1128                                                 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1129                                                 *f_even++ = (0x03 & (          g   >> 6)) |
1130                                                             (0x7C & (LIMIT_RGB(r_) >> 1));
1131                                                 break;
1132                                 }
1133                         }
1134                         clipmask_even_index += clipmask_add;
1135                         f_even += stretch_bytes;
1136
1137                         scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1138
1139                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1140                                 *f_odd++ = y[0];
1141                                 *f_odd++ = v;
1142                         }
1143                         else {
1144                                 y_ = 76284 * (y[0] - 16);
1145
1146                                 b_ = (y_ + vb) >> 16;
1147                                 g_ = (y_ + uvg)>> 16;
1148                                 r_ = (y_ + ur) >> 16;
1149
1150                                 switch (frame->v4l2_format.format) {
1151                                         case V4L2_PIX_FMT_RGB565:
1152                                                 g = LIMIT_RGB(g_);
1153                                                 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1154                                                 *f_odd++ = (0x07 & (          g   >> 5)) | (0xF8 & LIMIT_RGB(r_));
1155                                                 break;
1156                                         case V4L2_PIX_FMT_RGB24:
1157                                                 *f_odd++ = LIMIT_RGB(b_);
1158                                                 *f_odd++ = LIMIT_RGB(g_);
1159                                                 *f_odd++ = LIMIT_RGB(r_);
1160                                                 break;
1161                                         case V4L2_PIX_FMT_RGB32:
1162                                                 *f_odd++ = LIMIT_RGB(b_);
1163                                                 *f_odd++ = LIMIT_RGB(g_);
1164                                                 *f_odd++ = LIMIT_RGB(r_);
1165                                                 f_odd++;
1166                                                 break;
1167                                         case V4L2_PIX_FMT_RGB555:
1168                                                 g = LIMIT_RGB(g_);
1169                                                 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1170                                                 *f_odd++ = (0x03 & (          g   >> 6)) |
1171                                                            (0x7C & (LIMIT_RGB(r_) >> 1));
1172                                                 break;
1173                                 }
1174                         }
1175                         clipmask_odd_index += clipmask_add;
1176                         f_odd += stretch_bytes;
1177
1178                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1179                                 *f_odd++ = y[1];
1180                                 *f_odd++ = u;
1181                         }
1182                         else {
1183                                 y_ = 76284 * (y[1] - 16);
1184
1185                                 b_ = (y_ + vb) >> 16;
1186                                 g_ = (y_ + uvg)>> 16;
1187                                 r_ = (y_ + ur) >> 16;
1188
1189                                 switch (frame->v4l2_format.format) {
1190                                         case V4L2_PIX_FMT_RGB565:
1191                                                 g = LIMIT_RGB(g_);
1192                                                 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1193                                                 *f_odd++ = (0x07 & (          g   >> 5)) | (0xF8 & LIMIT_RGB(r_));
1194                                                 break;
1195                                         case V4L2_PIX_FMT_RGB24:
1196                                                 *f_odd++ = LIMIT_RGB(b_);
1197                                                 *f_odd++ = LIMIT_RGB(g_);
1198                                                 *f_odd++ = LIMIT_RGB(r_);
1199                                                 break;
1200                                         case V4L2_PIX_FMT_RGB32:
1201                                                 *f_odd++ = LIMIT_RGB(b_);
1202                                                 *f_odd++ = LIMIT_RGB(g_);
1203                                                 *f_odd++ = LIMIT_RGB(r_);
1204                                                 f_odd++;
1205                                                 break;
1206                                         case V4L2_PIX_FMT_RGB555:
1207                                                 g = LIMIT_RGB(g_);
1208                                                 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1209                                                 *f_odd++ = (0x03 & (          g   >> 6)) |
1210                                                            (0x7C & (LIMIT_RGB(r_) >> 1));
1211                                                 break;
1212                                 }
1213                         }
1214                         clipmask_odd_index += clipmask_add;
1215                         f_odd += stretch_bytes;
1216                 }
1217
1218                 scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size);
1219                 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1220                                 * sub_block_size);
1221                 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1222                                 * sub_block_size);
1223                 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1224                                 * sub_block_size);
1225         }
1226
1227         scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1228                         + block_split * sub_block_size);
1229
1230         frame->curline += 2 * usbvision->stretch_height;
1231         *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1232
1233         if (frame->curline >= frame->frmheight)
1234                 return ParseState_NextFrame;
1235         else
1236                 return ParseState_Continue;
1237 }
1238
1239 /*
1240  * usbvision_parse_data()
1241  *
1242  * Generic routine to parse the scratch buffer. It employs either
1243  * usbvision_find_header() or usbvision_parse_lines() to do most
1244  * of work.
1245  *
1246  */
1247 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1248 {
1249         struct usbvision_frame *frame;
1250         enum ParseState newstate;
1251         long copylen = 0;
1252         unsigned long lock_flags;
1253
1254         frame = usbvision->curFrame;
1255
1256         PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1257
1258         while (1) {
1259
1260                 newstate = ParseState_Out;
1261                 if (scratch_len(usbvision)) {
1262                         if (frame->scanstate == ScanState_Scanning) {
1263                                 newstate = usbvision_find_header(usbvision);
1264                         }
1265                         else if (frame->scanstate == ScanState_Lines) {
1266                                 if (usbvision->isocMode == ISOC_MODE_YUV420) {
1267                                         newstate = usbvision_parse_lines_420(usbvision, &copylen);
1268                                 }
1269                                 else if (usbvision->isocMode == ISOC_MODE_YUV422) {
1270                                         newstate = usbvision_parse_lines_422(usbvision, &copylen);
1271                                 }
1272                                 else if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
1273                                         newstate = usbvision_parse_compress(usbvision, &copylen);
1274                                 }
1275
1276                         }
1277                 }
1278                 if (newstate == ParseState_Continue) {
1279                         continue;
1280                 }
1281                 else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) {
1282                         break;
1283                 }
1284                 else {
1285                         return; /* ParseState_EndParse */
1286                 }
1287         }
1288
1289         if (newstate == ParseState_NextFrame) {
1290                 frame->grabstate = FrameState_Done;
1291                 do_gettimeofday(&(frame->timestamp));
1292                 frame->sequence = usbvision->frame_num;
1293
1294                 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1295                 list_move_tail(&(frame->frame), &usbvision->outqueue);
1296                 usbvision->curFrame = NULL;
1297                 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1298
1299                 usbvision->frame_num++;
1300
1301                 /* This will cause the process to request another frame. */
1302                 if (waitqueue_active(&usbvision->wait_frame)) {
1303                         PDEBUG(DBG_PARSE, "Wake up !");
1304                         wake_up_interruptible(&usbvision->wait_frame);
1305                 }
1306         }
1307         else
1308                 frame->grabstate = FrameState_Grabbing;
1309
1310
1311         /* Update the frame's uncompressed length. */
1312         frame->scanlength += copylen;
1313 }
1314
1315
1316 /*
1317  * Make all of the blocks of data contiguous
1318  */
1319 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1320                                           struct urb *urb)
1321 {
1322         unsigned char *packet_data;
1323         int i, totlen = 0;
1324
1325         for (i = 0; i < urb->number_of_packets; i++) {
1326                 int packet_len = urb->iso_frame_desc[i].actual_length;
1327                 int packet_stat = urb->iso_frame_desc[i].status;
1328
1329                 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1330
1331                 /* Detect and ignore errored packets */
1332                 if (packet_stat) {      // packet_stat != 0 ?????????????
1333                         PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1334                         usbvision->isocErrCount++;
1335                         continue;
1336                 }
1337
1338                 /* Detect and ignore empty packets */
1339                 if (packet_len < 0) {
1340                         PDEBUG(DBG_ISOC, "error packet [%d]", i);
1341                         usbvision->isocSkipCount++;
1342                         continue;
1343                 }
1344                 else if (packet_len == 0) {     /* Frame end ????? */
1345                         PDEBUG(DBG_ISOC, "null packet [%d]", i);
1346                         usbvision->isocstate=IsocState_NoFrame;
1347                         usbvision->isocSkipCount++;
1348                         continue;
1349                 }
1350                 else if (packet_len > usbvision->isocPacketSize) {
1351                         PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i);
1352                         usbvision->isocSkipCount++;
1353                         continue;
1354                 }
1355
1356                 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1357
1358                 if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins
1359                         usbvision->isocstate=IsocState_InFrame;
1360                         scratch_mark_header(usbvision);
1361                         usbvision_measure_bandwidth(usbvision);
1362                         PDEBUG(DBG_ISOC, "packet with header");
1363                 }
1364
1365                 /*
1366                  * If usbvision continues to feed us with data but there is no
1367                  * consumption (if, for example, V4L client fell asleep) we
1368                  * may overflow the buffer. We have to move old data over to
1369                  * free room for new data. This is bad for old data. If we
1370                  * just drop new data then it's bad for new data... choose
1371                  * your favorite evil here.
1372                  */
1373                 if (scratch_free(usbvision) < packet_len) {
1374
1375                         usbvision->scratch_ovf_count++;
1376                         PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1377                                scratch_len(usbvision), packet_len);
1378                         scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1379                 }
1380
1381                 /* Now we know that there is enough room in scratch buffer */
1382                 scratch_put(usbvision, packet_data, packet_len);
1383                 totlen += packet_len;
1384                 usbvision->isocDataCount += packet_len;
1385                 usbvision->isocPacketCount++;
1386         }
1387 #if ENABLE_HEXDUMP
1388         if (totlen > 0) {
1389                 static int foo = 0;
1390                 if (foo < 1) {
1391                         printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1392                         usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1393                         ++foo;
1394                 }
1395         }
1396 #endif
1397  return totlen;
1398 }
1399
1400 static void usbvision_isocIrq(struct urb *urb)
1401 {
1402         int errCode = 0;
1403         int len;
1404         struct usb_usbvision *usbvision = urb->context;
1405         int i;
1406         unsigned long startTime = jiffies;
1407         struct usbvision_frame **f;
1408
1409         /* We don't want to do anything if we are about to be removed! */
1410         if (!USBVISION_IS_OPERATIONAL(usbvision))
1411                 return;
1412
1413         f = &usbvision->curFrame;
1414
1415         /* Manage streaming interruption */
1416         if (usbvision->streaming == Stream_Interrupt) {
1417                 usbvision->streaming = Stream_Idle;
1418                 if ((*f)) {
1419                         (*f)->grabstate = FrameState_Ready;
1420                         (*f)->scanstate = ScanState_Scanning;
1421                 }
1422                 PDEBUG(DBG_IRQ, "stream interrupted");
1423                 wake_up_interruptible(&usbvision->wait_stream);
1424         }
1425
1426         /* Copy the data received into our scratch buffer */
1427         len = usbvision_compress_isochronous(usbvision, urb);
1428
1429         usbvision->isocUrbCount++;
1430         usbvision->urb_length = len;
1431
1432         if (usbvision->streaming == Stream_On) {
1433
1434                 /* If we collected enough data let's parse! */
1435                 if (scratch_len(usbvision) > USBVISION_HEADER_LENGTH) { /* 12 == header_length */
1436                         /*If we don't have a frame we're current working on, complain */
1437                         if(!list_empty(&(usbvision->inqueue))) {
1438                                 if (!(*f)) {
1439                                         (*f) = list_entry(usbvision->inqueue.next,struct usbvision_frame, frame);
1440                                 }
1441                                 usbvision_parse_data(usbvision);
1442                         }
1443                         else {
1444                                 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1445                                 scratch_reset(usbvision);
1446                         }
1447                 }
1448         }
1449         else {
1450                 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1451                 scratch_reset(usbvision);
1452         }
1453
1454         usbvision->timeInIrq += jiffies - startTime;
1455
1456         for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1457                 urb->iso_frame_desc[i].status = 0;
1458                 urb->iso_frame_desc[i].actual_length = 0;
1459         }
1460
1461         urb->status = 0;
1462         urb->dev = usbvision->dev;
1463         errCode = usb_submit_urb (urb, GFP_ATOMIC);
1464
1465         /* Disable this warning.  By design of the driver. */
1466         //      if(errCode) {
1467         //              err("%s: usb_submit_urb failed: error %d", __FUNCTION__, errCode);
1468         //      }
1469
1470         return;
1471 }
1472
1473 /*************************************/
1474 /* Low level usbvision access functions */
1475 /*************************************/
1476
1477 /*
1478  * usbvision_read_reg()
1479  *
1480  * return  < 0 -> Error
1481  *        >= 0 -> Data
1482  */
1483
1484 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1485 {
1486         int errCode = 0;
1487         unsigned char buffer[1];
1488
1489         if (!USBVISION_IS_OPERATIONAL(usbvision))
1490                 return -1;
1491
1492         errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1493                                 USBVISION_OP_CODE,
1494                                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1495                                 0, (__u16) reg, buffer, 1, HZ);
1496
1497         if (errCode < 0) {
1498                 err("%s: failed: error %d", __FUNCTION__, errCode);
1499                 return errCode;
1500         }
1501         return buffer[0];
1502 }
1503
1504 /*
1505  * usbvision_write_reg()
1506  *
1507  * return 1 -> Reg written
1508  *        0 -> usbvision is not yet ready
1509  *       -1 -> Something went wrong
1510  */
1511
1512 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1513                             unsigned char value)
1514 {
1515         int errCode = 0;
1516
1517         if (!USBVISION_IS_OPERATIONAL(usbvision))
1518                 return 0;
1519
1520         errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1521                                 USBVISION_OP_CODE,
1522                                 USB_DIR_OUT | USB_TYPE_VENDOR |
1523                                 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
1524
1525         if (errCode < 0) {
1526                 err("%s: failed: error %d", __FUNCTION__, errCode);
1527         }
1528         return errCode;
1529 }
1530
1531
1532 static void usbvision_ctrlUrb_complete(struct urb *urb)
1533 {
1534         struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1535
1536         PDEBUG(DBG_IRQ, "");
1537         usbvision->ctrlUrbBusy = 0;
1538         if (waitqueue_active(&usbvision->ctrlUrb_wq)) {
1539                 wake_up_interruptible(&usbvision->ctrlUrb_wq);
1540         }
1541 }
1542
1543
1544 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address,
1545                                                                         unsigned char *data, int len)
1546 {
1547         int errCode = 0;
1548
1549         PDEBUG(DBG_IRQ, "");
1550         if (len > 8) {
1551                 return -EFAULT;
1552         }
1553 //      down(&usbvision->ctrlUrbLock);
1554         if (usbvision->ctrlUrbBusy) {
1555 //              up(&usbvision->ctrlUrbLock);
1556                 return -EBUSY;
1557         }
1558         usbvision->ctrlUrbBusy = 1;
1559 //      up(&usbvision->ctrlUrbLock);
1560
1561         usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1562         usbvision->ctrlUrbSetup.bRequest     = USBVISION_OP_CODE;
1563         usbvision->ctrlUrbSetup.wValue       = 0;
1564         usbvision->ctrlUrbSetup.wIndex       = cpu_to_le16(address);
1565         usbvision->ctrlUrbSetup.wLength      = cpu_to_le16(len);
1566         usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev,
1567                                                         usb_sndctrlpipe(usbvision->dev, 1),
1568                                                         (unsigned char *)&usbvision->ctrlUrbSetup,
1569                                                         (void *)usbvision->ctrlUrbBuffer, len,
1570                                                         usbvision_ctrlUrb_complete,
1571                                                         (void *)usbvision);
1572
1573         memcpy(usbvision->ctrlUrbBuffer, data, len);
1574
1575         errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC);
1576         if (errCode < 0) {
1577                 // error in usb_submit_urb()
1578                 usbvision->ctrlUrbBusy = 0;
1579         }
1580         PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode);
1581         return errCode;
1582 }
1583
1584
1585 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1586 {
1587         int errCode = 0;
1588
1589         usbvision->lastIsocFrameNum = -1;
1590         usbvision->isocDataCount = 0;
1591         usbvision->isocPacketCount = 0;
1592         usbvision->isocSkipCount = 0;
1593         usbvision->comprLevel = 50;
1594         usbvision->lastComprLevel = -1;
1595         usbvision->isocUrbCount = 0;
1596         usbvision->requestIntra = 1;
1597         usbvision->isocMeasureBandwidthCount = 0;
1598
1599         return errCode;
1600 }
1601
1602 /* this function measures the used bandwidth since last call
1603  * return:    0 : no error
1604  * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize
1605  */
1606 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision)
1607 {
1608         int errCode = 0;
1609
1610         if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames
1611                 usbvision->isocMeasureBandwidthCount++;
1612                 return errCode;
1613         }
1614         if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) {
1615                 usbvision->usedBandwidth = usbvision->isocDataCount /
1616                                         (usbvision->isocPacketCount + usbvision->isocSkipCount) *
1617                                         100 / usbvision->isocPacketSize;
1618         }
1619         usbvision->isocMeasureBandwidthCount = 0;
1620         usbvision->isocDataCount = 0;
1621         usbvision->isocPacketCount = 0;
1622         usbvision->isocSkipCount = 0;
1623         return errCode;
1624 }
1625
1626 static int usbvision_adjust_compression (struct usb_usbvision *usbvision)
1627 {
1628         int errCode = 0;
1629         unsigned char buffer[6];
1630
1631         PDEBUG(DBG_IRQ, "");
1632         if ((adjustCompression) && (usbvision->usedBandwidth > 0)) {
1633                 usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2;
1634                 RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100);
1635                 if (usbvision->comprLevel != usbvision->lastComprLevel) {
1636                         int distorsion;
1637                         if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) {
1638                                 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100);      // PCM Threshold 1
1639                                 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100);       // PCM Threshold 2
1640                                 distorsion = 7 + 248 * usbvision->comprLevel / 100;
1641                                 buffer[2] = (unsigned char)(distorsion & 0xFF);                         // Average distorsion Threshold (inter)
1642                                 buffer[3] = (unsigned char)(distorsion & 0xFF);                         // Average distorsion Threshold (intra)
1643                                 distorsion = 1 + 42 * usbvision->comprLevel / 100;
1644                                 buffer[4] = (unsigned char)(distorsion & 0xFF);                         // Maximum distorsion Threshold (inter)
1645                                 buffer[5] = (unsigned char)(distorsion & 0xFF);                         // Maximum distorsion Threshold (intra)
1646                         }
1647                         else { //BRIDGE_NT1003
1648                                 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100);      // PCM threshold 1
1649                                 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100);       // PCM threshold 2
1650                                 distorsion = 2 + 253 * usbvision->comprLevel / 100;
1651                                 buffer[2] = (unsigned char)(distorsion & 0xFF);                         // distorsion threshold bit0-7
1652                                 buffer[3] = 0;  //(unsigned char)((distorsion >> 8) & 0x0F);            // distorsion threshold bit 8-11
1653                                 distorsion = 0 + 43 * usbvision->comprLevel / 100;
1654                                 buffer[4] = (unsigned char)(distorsion & 0xFF);                         // maximum distorsion bit0-7
1655                                 buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01);             // maximum distorsion bit 8
1656                         }
1657                         errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1658                         if (errCode == 0){
1659                                 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1660                                                                 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1661                                 usbvision->lastComprLevel = usbvision->comprLevel;
1662                         }
1663                 }
1664         }
1665         return errCode;
1666 }
1667
1668 static int usbvision_request_intra (struct usb_usbvision *usbvision)
1669 {
1670         int errCode = 0;
1671         unsigned char buffer[1];
1672
1673         PDEBUG(DBG_IRQ, "");
1674         usbvision->requestIntra = 1;
1675         buffer[0] = 1;
1676         usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1677         return errCode;
1678 }
1679
1680 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision)
1681 {
1682         int errCode = 0;
1683         unsigned char buffer[1];
1684
1685         PDEBUG(DBG_IRQ, "");
1686         usbvision->requestIntra = 0;
1687         buffer[0] = 0;
1688         usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1689         return errCode;
1690 }
1691
1692 /*******************************
1693  * usbvision utility functions
1694  *******************************/
1695
1696 int usbvision_power_off(struct usb_usbvision *usbvision)
1697 {
1698         int errCode = 0;
1699
1700         PDEBUG(DBG_FUNC, "");
1701
1702         errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1703         if (errCode == 1) {
1704                 usbvision->power = 0;
1705         }
1706         PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode);
1707         return errCode;
1708 }
1709
1710
1711 /*
1712  * usbvision_set_video_format()
1713  *
1714  */
1715 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1716 {
1717         static const char proc[] = "usbvision_set_video_format";
1718         int rc;
1719         unsigned char value[2];
1720
1721         if (!USBVISION_IS_OPERATIONAL(usbvision))
1722                 return 0;
1723
1724         PDEBUG(DBG_FUNC, "isocMode %#02x", format);
1725
1726         if ((format != ISOC_MODE_YUV422)
1727             && (format != ISOC_MODE_YUV420)
1728             && (format != ISOC_MODE_COMPRESS)) {
1729                 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1730                        format);
1731                 format = ISOC_MODE_YUV420;
1732         }
1733         value[0] = 0x0A;  //TODO: See the effect of the filter
1734         value[1] = format;
1735         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1736                              USBVISION_OP_CODE,
1737                              USB_DIR_OUT | USB_TYPE_VENDOR |
1738                              USB_RECIP_ENDPOINT, 0,
1739                              (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1740
1741         if (rc < 0) {
1742                 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1743                        "reconnect or reload driver.\n", proc, rc);
1744         }
1745         usbvision->isocMode = format;
1746         return rc;
1747 }
1748
1749 /*
1750  * usbvision_set_output()
1751  *
1752  */
1753
1754 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1755                          int height)
1756 {
1757         int errCode = 0;
1758         int UsbWidth, UsbHeight;
1759         unsigned int frameRate=0, frameDrop=0;
1760         unsigned char value[4];
1761
1762         if (!USBVISION_IS_OPERATIONAL(usbvision)) {
1763                 return 0;
1764         }
1765
1766         if (width > MAX_USB_WIDTH) {
1767                 UsbWidth = width / 2;
1768                 usbvision->stretch_width = 2;
1769         }
1770         else {
1771                 UsbWidth = width;
1772                 usbvision->stretch_width = 1;
1773         }
1774
1775         if (height > MAX_USB_HEIGHT) {
1776                 UsbHeight = height / 2;
1777                 usbvision->stretch_height = 2;
1778         }
1779         else {
1780                 UsbHeight = height;
1781                 usbvision->stretch_height = 1;
1782         }
1783
1784         RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1785         UsbWidth &= ~(MIN_FRAME_WIDTH-1);
1786         RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1787         UsbHeight &= ~(1);
1788
1789         PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1790                                                 UsbWidth, UsbHeight, width, height,
1791                                                 usbvision->stretch_width, usbvision->stretch_height);
1792
1793         /* I'll not rewrite the same values */
1794         if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) {
1795                 value[0] = UsbWidth & 0xff;             //LSB
1796                 value[1] = (UsbWidth >> 8) & 0x03;      //MSB
1797                 value[2] = UsbHeight & 0xff;            //LSB
1798                 value[3] = (UsbHeight >> 8) & 0x03;     //MSB
1799
1800                 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1801                              USBVISION_OP_CODE,
1802                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1803                                  0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1804
1805                 if (errCode < 0) {
1806                         err("%s failed: error %d", __FUNCTION__, errCode);
1807                         return errCode;
1808                 }
1809                 usbvision->curwidth = usbvision->stretch_width * UsbWidth;
1810                 usbvision->curheight = usbvision->stretch_height * UsbHeight;
1811         }
1812
1813         if (usbvision->isocMode == ISOC_MODE_YUV422) {
1814                 frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2);
1815         }
1816         else if (usbvision->isocMode == ISOC_MODE_YUV420) {
1817                 frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8);
1818         }
1819         else {
1820                 frameRate = FRAMERATE_MAX;
1821         }
1822
1823         if (usbvision->tvnorm->id & V4L2_STD_625_50) {
1824                 frameDrop = frameRate * 32 / 25 - 1;
1825         }
1826         else if (usbvision->tvnorm->id & V4L2_STD_525_60) {
1827                 frameDrop = frameRate * 32 / 30 - 1;
1828         }
1829
1830         RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX);
1831
1832         PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop);
1833
1834         frameDrop = FRAMERATE_MAX;      // We can allow the maximum here, because dropping is controlled
1835
1836         /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1837                 => frameSkip = 4;
1838                 => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1839
1840            frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1841             => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1842                 => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1843         */
1844         errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop);
1845         return errCode;
1846 }
1847
1848
1849 /*
1850  * usbvision_frames_alloc
1851  * allocate the maximum frames this driver can manage
1852  */
1853 int usbvision_frames_alloc(struct usb_usbvision *usbvision)
1854 {
1855         int i;
1856
1857         /* Allocate memory for the frame buffers */
1858         usbvision->max_frame_size = MAX_FRAME_SIZE;
1859         usbvision->fbuf_size = USBVISION_NUMFRAMES * usbvision->max_frame_size;
1860         usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size);
1861
1862         if(usbvision->fbuf == NULL) {
1863                 err("%s: unable to allocate %d bytes for fbuf ",
1864                     __FUNCTION__, usbvision->fbuf_size);
1865                 return -ENOMEM;
1866         }
1867         spin_lock_init(&usbvision->queue_lock);
1868         init_waitqueue_head(&usbvision->wait_frame);
1869         init_waitqueue_head(&usbvision->wait_stream);
1870
1871         /* Allocate all buffers */
1872         for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1873                 usbvision->frame[i].index = i;
1874                 usbvision->frame[i].grabstate = FrameState_Unused;
1875                 usbvision->frame[i].data = usbvision->fbuf +
1876                         i * usbvision->max_frame_size;
1877                 /*
1878                  * Set default sizes for read operation.
1879                  */
1880                 usbvision->stretch_width = 1;
1881                 usbvision->stretch_height = 1;
1882                 usbvision->frame[i].width = usbvision->curwidth;
1883                 usbvision->frame[i].height = usbvision->curheight;
1884                 usbvision->frame[i].bytes_read = 0;
1885         }
1886         return 0;
1887 }
1888
1889 /*
1890  * usbvision_frames_free
1891  * frees memory allocated for the frames
1892  */
1893 void usbvision_frames_free(struct usb_usbvision *usbvision)
1894 {
1895         /* Have to free all that memory */
1896         if (usbvision->fbuf != NULL) {
1897                 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1898                 usbvision->fbuf = NULL;
1899         }
1900 }
1901 /*
1902  * usbvision_empty_framequeues()
1903  * prepare queues for incoming and outgoing frames
1904  */
1905 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1906 {
1907         u32 i;
1908
1909         INIT_LIST_HEAD(&(usbvision->inqueue));
1910         INIT_LIST_HEAD(&(usbvision->outqueue));
1911
1912         for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1913                 usbvision->frame[i].grabstate = FrameState_Unused;
1914                 usbvision->frame[i].bytes_read = 0;
1915         }
1916 }
1917
1918 /*
1919  * usbvision_stream_interrupt()
1920  * stops streaming
1921  */
1922 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1923 {
1924         int ret = 0;
1925
1926         /* stop reading from the device */
1927
1928         usbvision->streaming = Stream_Interrupt;
1929         ret = wait_event_timeout(usbvision->wait_stream,
1930                                  (usbvision->streaming == Stream_Idle),
1931                                  msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1932         return ret;
1933 }
1934
1935 /*
1936  * usbvision_set_compress_params()
1937  *
1938  */
1939
1940 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
1941 {
1942         static const char proc[] = "usbvision_set_compresion_params: ";
1943         int rc;
1944         unsigned char value[6];
1945
1946         value[0] = 0x0F;    // Intra-Compression cycle
1947         value[1] = 0x01;    // Reg.45 one line per strip
1948         value[2] = 0x00;    // Reg.46 Force intra mode on all new frames
1949         value[3] = 0x00;    // Reg.47 FORCE_UP <- 0 normal operation (not force)
1950         value[4] = 0xA2;    // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode.
1951         value[5] = 0x00;    // Reg.49 DVI_YUV This has nothing to do with compression
1952
1953         //catched values for NT1004
1954         // value[0] = 0xFF; // Never apply intra mode automatically
1955         // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip
1956         // value[2] = 0x01; // Force intra mode on all new frames
1957         // value[3] = 0x00; // Strip size 400 Bytes; do not force up
1958         // value[4] = 0xA2; //
1959         if (!USBVISION_IS_OPERATIONAL(usbvision))
1960                 return 0;
1961
1962         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1963                              USBVISION_OP_CODE,
1964                              USB_DIR_OUT | USB_TYPE_VENDOR |
1965                              USB_RECIP_ENDPOINT, 0,
1966                              (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
1967
1968         if (rc < 0) {
1969                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
1970                        "reconnect or reload driver.\n", proc, rc);
1971                 return rc;
1972         }
1973
1974         if (usbvision->bridgeType == BRIDGE_NT1004) {
1975                 value[0] =  20; // PCM Threshold 1
1976                 value[1] =  12; // PCM Threshold 2
1977                 value[2] = 255; // Distorsion Threshold inter
1978                 value[3] = 255; // Distorsion Threshold intra
1979                 value[4] =  43; // Max Distorsion inter
1980                 value[5] =  43; // Max Distorsion intra
1981         }
1982         else {
1983                 value[0] =  20; // PCM Threshold 1
1984                 value[1] =  12; // PCM Threshold 2
1985                 value[2] = 255; // Distorsion Threshold d7-d0
1986                 value[3] =   0; // Distorsion Threshold d11-d8
1987                 value[4] =  43; // Max Distorsion d7-d0
1988                 value[5] =   0; // Max Distorsion d8
1989         }
1990
1991         if (!USBVISION_IS_OPERATIONAL(usbvision))
1992                 return 0;
1993
1994         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1995                              USBVISION_OP_CODE,
1996                              USB_DIR_OUT | USB_TYPE_VENDOR |
1997                              USB_RECIP_ENDPOINT, 0,
1998                              (__u16) USBVISION_PCM_THR1, value, 6, HZ);
1999
2000         if (rc < 0) {
2001                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2002                        "reconnect or reload driver.\n", proc, rc);
2003                 return rc;
2004         }
2005
2006
2007         return rc;
2008 }
2009
2010
2011 /*
2012  * usbvision_set_input()
2013  *
2014  * Set the input (saa711x, ...) size x y and other misc input params
2015  * I've no idea if this parameters are right
2016  *
2017  */
2018 int usbvision_set_input(struct usb_usbvision *usbvision)
2019 {
2020         static const char proc[] = "usbvision_set_input: ";
2021         int rc;
2022         unsigned char value[8];
2023         unsigned char dvi_yuv_value;
2024
2025         if (!USBVISION_IS_OPERATIONAL(usbvision))
2026                 return 0;
2027
2028         /* Set input format expected from decoder*/
2029         if (usbvision_device_data[usbvision->DevModel].Vin_Reg1 >= 0) {
2030                 value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1 & 0xff;
2031         } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2032                 /* SAA7113 uses 8 bit output */
2033                 value[0] = USBVISION_8_422_SYNC;
2034         } else {
2035                 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
2036                  * as that is how saa7111 is configured */
2037                 value[0] = USBVISION_16_422_SYNC;
2038                 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
2039         }
2040
2041         rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
2042         if (rc < 0) {
2043                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2044                        "reconnect or reload driver.\n", proc, rc);
2045                 return rc;
2046         }
2047
2048
2049         if (usbvision->tvnorm->id & V4L2_STD_PAL) {
2050                 value[0] = 0xC0;
2051                 value[1] = 0x02;        //0x02C0 -> 704 Input video line length
2052                 value[2] = 0x20;
2053                 value[3] = 0x01;        //0x0120 -> 288 Input video n. of lines
2054                 value[4] = 0x60;
2055                 value[5] = 0x00;        //0x0060 -> 96 Input video h offset
2056                 value[6] = 0x16;
2057                 value[7] = 0x00;        //0x0016 -> 22 Input video v offset
2058         } else if (usbvision->tvnorm->id & V4L2_STD_SECAM) {
2059                 value[0] = 0xC0;
2060                 value[1] = 0x02;        //0x02C0 -> 704 Input video line length
2061                 value[2] = 0x20;
2062                 value[3] = 0x01;        //0x0120 -> 288 Input video n. of lines
2063                 value[4] = 0x01;
2064                 value[5] = 0x00;        //0x0001 -> 01 Input video h offset
2065                 value[6] = 0x01;
2066                 value[7] = 0x00;        //0x0001 -> 01 Input video v offset
2067         } else {        /* V4L2_STD_NTSC */
2068                 value[0] = 0xD0;
2069                 value[1] = 0x02;        //0x02D0 -> 720 Input video line length
2070                 value[2] = 0xF0;
2071                 value[3] = 0x00;        //0x00F0 -> 240 Input video number of lines
2072                 value[4] = 0x50;
2073                 value[5] = 0x00;        //0x0050 -> 80 Input video h offset
2074                 value[6] = 0x10;
2075                 value[7] = 0x00;        //0x0010 -> 16 Input video v offset
2076         }
2077
2078         if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) {
2079                 value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff;
2080                 value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8;
2081         }
2082
2083         if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) {
2084                 value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff;
2085                 value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8;
2086         }
2087
2088         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2089                              USBVISION_OP_CODE, /* USBVISION specific code */
2090                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2091                              (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2092         if (rc < 0) {
2093                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2094                        "reconnect or reload driver.\n", proc, rc);
2095                 return rc;
2096         }
2097
2098
2099         dvi_yuv_value = 0x00;   /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2100
2101         if(usbvision_device_data[usbvision->DevModel].Dvi_yuv >= 0){
2102                 dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv & 0xff;
2103         }
2104         else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2105         /* This changes as the fine sync control changes. Further investigation necessary */
2106                 dvi_yuv_value = 0x06;
2107         }
2108
2109         return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value));
2110 }
2111
2112
2113 /*
2114  * usbvision_set_dram_settings()
2115  *
2116  * Set the buffer address needed by the usbvision dram to operate
2117  * This values has been taken with usbsnoop.
2118  *
2119  */
2120
2121 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2122 {
2123         int rc;
2124         unsigned char value[8];
2125
2126         if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2127                 value[0] = 0x42;
2128                 value[1] = 0x71;
2129                 value[2] = 0xff;
2130                 value[3] = 0x00;
2131                 value[4] = 0x98;
2132                 value[5] = 0xe0;
2133                 value[6] = 0x71;
2134                 value[7] = 0xff;
2135                 // UR:  0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte)
2136                 // FDL: 0x00000-0x0E099 =  57498 Words
2137                 // VDW: 0x0E3FF-0x3FFFF
2138         }
2139         else {
2140                 value[0] = 0x42;
2141                 value[1] = 0x00;
2142                 value[2] = 0xff;
2143                 value[3] = 0x00;
2144                 value[4] = 0x00;
2145                 value[5] = 0x00;
2146                 value[6] = 0x00;
2147                 value[7] = 0xff;
2148         }
2149         /* These are the values of the address of the video buffer,
2150          * they have to be loaded into the USBVISION_DRM_PRM1-8
2151          *
2152          * Start address of video output buffer for read:       drm_prm1-2 -> 0x00000
2153          * End address of video output buffer for read:         drm_prm1-3 -> 0x1ffff
2154          * Start address of video frame delay buffer:           drm_prm1-4 -> 0x20000
2155          *    Only used in compressed mode
2156          * End address of video frame delay buffer:             drm_prm1-5-6 -> 0x3ffff
2157          *    Only used in compressed mode
2158          * Start address of video output buffer for write:      drm_prm1-7 -> 0x00000
2159          * End address of video output buffer for write:        drm_prm1-8 -> 0x1ffff
2160          */
2161
2162         if (!USBVISION_IS_OPERATIONAL(usbvision))
2163                 return 0;
2164
2165         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2166                              USBVISION_OP_CODE, /* USBVISION specific code */
2167                              USB_DIR_OUT | USB_TYPE_VENDOR |
2168                              USB_RECIP_ENDPOINT, 0,
2169                              (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2170
2171         if (rc < 0) {
2172                 err("%sERROR=%d", __FUNCTION__, rc);
2173                 return rc;
2174         }
2175
2176         /* Restart the video buffer logic */
2177         if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2178                                    USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0)
2179                 return rc;
2180         rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2181
2182         return rc;
2183 }
2184
2185 /*
2186  * ()
2187  *
2188  * Power on the device, enables suspend-resume logic
2189  * &  reset the isoc End-Point
2190  *
2191  */
2192
2193 int usbvision_power_on(struct usb_usbvision *usbvision)
2194 {
2195         int errCode = 0;
2196
2197         PDEBUG(DBG_FUNC, "");
2198
2199         usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2200         usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2201                          USBVISION_SSPND_EN | USBVISION_RES2);
2202         usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2203                          USBVISION_SSPND_EN | USBVISION_PWR_VID);
2204         errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2205                                                 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2206         if (errCode == 1) {
2207                 usbvision->power = 1;
2208         }
2209         PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode);
2210         return errCode;
2211 }
2212
2213
2214 /*
2215  * usbvision timer stuff
2216  */
2217
2218 // to call usbvision_power_off from task queue
2219 static void call_usbvision_power_off(void *_usbvision)
2220 {
2221         struct usb_usbvision *usbvision = _usbvision;
2222
2223         PDEBUG(DBG_FUNC, "");
2224         down_interruptible(&usbvision->lock);
2225         if(usbvision->user == 0) {
2226                 usbvision_i2c_usb_del_bus(&usbvision->i2c_adap);
2227                 usbvision_power_off(usbvision);
2228                 usbvision->initialized = 0;
2229         }
2230         up(&usbvision->lock);
2231 }
2232
2233 static void usbvision_powerOffTimer(unsigned long data)
2234 {
2235         struct usb_usbvision *usbvision = (void *) data;
2236
2237         PDEBUG(DBG_FUNC, "");
2238         del_timer(&usbvision->powerOffTimer);
2239         INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off, usbvision);
2240         (void) schedule_work(&usbvision->powerOffWork);
2241
2242 }
2243
2244 void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision)
2245 {
2246         init_timer(&usbvision->powerOffTimer);
2247         usbvision->powerOffTimer.data = (long) usbvision;
2248         usbvision->powerOffTimer.function = usbvision_powerOffTimer;
2249 }
2250
2251 void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision)
2252 {
2253         mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME);
2254 }
2255
2256 void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision)
2257 {
2258         if (timer_pending(&usbvision->powerOffTimer)) {
2259                 del_timer(&usbvision->powerOffTimer);
2260         }
2261 }
2262
2263 /*
2264  * usbvision_begin_streaming()
2265  * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2266  * idea about the rest
2267  */
2268 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2269 {
2270         int errCode = 0;
2271
2272         if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2273                 usbvision_init_compression(usbvision);
2274         }
2275         errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID |
2276                                                                                 usbvision->Vin_Reg2_Preset);
2277         return errCode;
2278 }
2279
2280 /*
2281  * usbvision_restart_isoc()
2282  * Not sure yet if touching here PWR_REG make loose the config
2283  */
2284
2285 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2286 {
2287         int ret;
2288
2289         if (
2290             (ret =
2291              usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2292                               USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0)
2293                 return ret;
2294         if (
2295             (ret =
2296              usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2297                               USBVISION_SSPND_EN | USBVISION_PWR_VID |
2298                               USBVISION_RES2)) < 0)
2299                 return ret;
2300         if (
2301             (ret =
2302              usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2303                               USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2304                                   usbvision->Vin_Reg2_Preset)) < 0) return ret;
2305
2306         /* TODO: schedule timeout */
2307         while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) && 0x01) != 1);
2308
2309         return 0;
2310 }
2311
2312 int usbvision_audio_off(struct usb_usbvision *usbvision)
2313 {
2314         if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2315                 printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n");
2316                 return -1;
2317         }
2318         usbvision->AudioMute = 0;
2319         usbvision->AudioChannel = USBVISION_AUDIO_MUTE;
2320         return 0;
2321 }
2322
2323 int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel)
2324 {
2325         if (!usbvision->AudioMute) {
2326                 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) {
2327                         printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2328                         return -1;
2329                 }
2330         }
2331         usbvision->AudioChannel = AudioChannel;
2332         return 0;
2333 }
2334
2335 int usbvision_setup(struct usb_usbvision *usbvision,int format)
2336 {
2337         usbvision_set_video_format(usbvision, format);
2338         usbvision_set_dram_settings(usbvision);
2339         usbvision_set_compress_params(usbvision);
2340         usbvision_set_input(usbvision);
2341         usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2342         usbvision_restart_isoc(usbvision);
2343
2344         /* cosas del PCM */
2345         return USBVISION_IS_OPERATIONAL(usbvision);
2346 }
2347
2348
2349 int usbvision_sbuf_alloc(struct usb_usbvision *usbvision)
2350 {
2351         int i, errCode = 0;
2352         const int sb_size = USBVISION_URB_FRAMES * USBVISION_MAX_ISOC_PACKET_SIZE;
2353
2354         /* Clean pointers so we know if we allocated something */
2355         for (i = 0; i < USBVISION_NUMSBUF; i++)
2356                 usbvision->sbuf[i].data = NULL;
2357
2358         for (i = 0; i < USBVISION_NUMSBUF; i++) {
2359                 usbvision->sbuf[i].data = kzalloc(sb_size, GFP_KERNEL);
2360                 if (usbvision->sbuf[i].data == NULL) {
2361                         err("%s: unable to allocate %d bytes for sbuf", __FUNCTION__, sb_size);
2362                         errCode = -ENOMEM;
2363                         break;
2364                 }
2365         }
2366         return errCode;
2367 }
2368
2369
2370 void usbvision_sbuf_free(struct usb_usbvision *usbvision)
2371 {
2372         int i;
2373
2374         for (i = 0; i < USBVISION_NUMSBUF; i++) {
2375                 if (usbvision->sbuf[i].data != NULL) {
2376                         kfree(usbvision->sbuf[i].data);
2377                         usbvision->sbuf[i].data = NULL;
2378                 }
2379         }
2380 }
2381
2382 /*
2383  * usbvision_init_isoc()
2384  *
2385  */
2386 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2387 {
2388         struct usb_device *dev = usbvision->dev;
2389         int bufIdx, errCode, regValue;
2390
2391         if (!USBVISION_IS_OPERATIONAL(usbvision))
2392                 return -EFAULT;
2393
2394         usbvision->curFrame = NULL;
2395         scratch_reset(usbvision);
2396
2397         /* Alternate interface 1 is is the biggest frame size */
2398         errCode = usb_set_interface(dev, usbvision->iface, usbvision->ifaceAltActive);
2399         if (errCode < 0) {
2400                 usbvision->last_error = errCode;
2401                 return -EBUSY;
2402         }
2403
2404         regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2405         usbvision->isocPacketSize = (regValue == 0) ? 0 : (regValue * 64) - 1;
2406         PDEBUG(DBG_ISOC, "ISO Packet Length:%d", usbvision->isocPacketSize);
2407
2408         usbvision->usb_bandwidth = regValue >> 1;
2409         PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth);
2410
2411
2412
2413         /* We double buffer the Iso lists */
2414
2415         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2416                 int j, k;
2417                 struct urb *urb;
2418
2419                 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2420                 if (urb == NULL) {
2421                         err("%s: usb_alloc_urb() failed", __FUNCTION__);
2422                         return -ENOMEM;
2423                 }
2424                 usbvision->sbuf[bufIdx].urb = urb;
2425                 urb->dev = dev;
2426                 urb->context = usbvision;
2427                 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2428                 urb->transfer_flags = URB_ISO_ASAP;
2429                 urb->interval = 1;
2430                 urb->transfer_buffer = usbvision->sbuf[bufIdx].data;
2431                 urb->complete = usbvision_isocIrq;
2432                 urb->number_of_packets = USBVISION_URB_FRAMES;
2433                 urb->transfer_buffer_length =
2434                     usbvision->isocPacketSize * USBVISION_URB_FRAMES;
2435                 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2436                      k += usbvision->isocPacketSize) {
2437                         urb->iso_frame_desc[j].offset = k;
2438                         urb->iso_frame_desc[j].length = usbvision->isocPacketSize;
2439                 }
2440         }
2441
2442
2443         /* Submit all URBs */
2444         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2445                         errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb, GFP_KERNEL);
2446                 if (errCode) {
2447                         err("%s: usb_submit_urb(%d) failed: error %d", __FUNCTION__, bufIdx, errCode);
2448                 }
2449         }
2450
2451         usbvision->streaming = Stream_Idle;
2452         PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x", __FUNCTION__, usbvision->video_endp);
2453         return 0;
2454 }
2455
2456 /*
2457  * usbvision_stop_isoc()
2458  *
2459  * This procedure stops streaming and deallocates URBs. Then it
2460  * activates zero-bandwidth alt. setting of the video interface.
2461  *
2462  */
2463 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2464 {
2465         int bufIdx, errCode, regValue;
2466
2467         if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL))
2468                 return;
2469
2470         /* Unschedule all of the iso td's */
2471         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2472                 usb_kill_urb(usbvision->sbuf[bufIdx].urb);
2473                 usb_free_urb(usbvision->sbuf[bufIdx].urb);
2474                 usbvision->sbuf[bufIdx].urb = NULL;
2475         }
2476
2477
2478         PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __FUNCTION__);
2479         usbvision->streaming = Stream_Off;
2480
2481         if (!usbvision->remove_pending) {
2482
2483                 /* Set packet size to 0 */
2484                 errCode = usb_set_interface(usbvision->dev, usbvision->iface,
2485                                       usbvision->ifaceAltInactive);
2486                 if (errCode < 0) {
2487                         err("%s: usb_set_interface() failed: error %d", __FUNCTION__, errCode);
2488                         usbvision->last_error = errCode;
2489                 }
2490                 regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2491                 usbvision->isocPacketSize = (regValue == 0) ? 0 : (regValue * 64) - 1;
2492                 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", usbvision->isocPacketSize);
2493
2494                 usbvision->usb_bandwidth = regValue >> 1;
2495                 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth);
2496         }
2497 }
2498
2499 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2500 {
2501         int mode[4];
2502         int audio[]= {1, 0, 0, 0};
2503         struct v4l2_routing route;
2504         //channel 0 is TV with audiochannel 1 (tuner mono)
2505         //channel 1 is Composite with audio channel 0 (line in)
2506         //channel 2 is S-Video with audio channel 0 (line in)
2507         //channel 3 is additional video inputs to the device with audio channel 0 (line in)
2508
2509         RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2510         usbvision->ctl_input = channel;
2511           route.input = SAA7115_COMPOSITE1;
2512           call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
2513           call_i2c_clients(usbvision, VIDIOC_S_INPUT, &usbvision->ctl_input);
2514
2515         // set the new channel
2516         // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video
2517         // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red
2518
2519         switch (usbvision_device_data[usbvision->DevModel].Codec) {
2520                 case CODEC_SAA7113:
2521                         if (SwitchSVideoInput) { // To handle problems with S-Video Input for some devices.  Use SwitchSVideoInput parameter when loading the module.
2522                                 mode[2] = 1;
2523                         }
2524                         else {
2525                                 mode[2] = 7;
2526                         }
2527                         if (usbvision_device_data[usbvision->DevModel].VideoChannels == 4) {
2528                                 mode[0] = 0; mode[1] = 2; mode[3] = 3;  // Special for four input devices
2529                         }
2530                         else {
2531                                 mode[0] = 0; mode[1] = 2; //modes for regular saa7113 devices
2532                         }
2533                         break;
2534                 case CODEC_SAA7111:
2535                         mode[0] = 0; mode[1] = 1; mode[2] = 7; //modes for saa7111
2536                         break;
2537                 default:
2538                         mode[0] = 0; mode[1] = 1; mode[2] = 7; //default modes
2539         }
2540         route.input = mode[channel];
2541         call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
2542         usbvision->channel = channel;
2543         usbvision_set_audio(usbvision, audio[channel]);
2544         return 0;
2545 }
2546
2547 /*
2548  * Overrides for Emacs so that we follow Linus's tabbing style.
2549  * ---------------------------------------------------------------------------
2550  * Local variables:
2551  * c-basic-offset: 8
2552  * End:
2553  */