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

   1 /*
   2  * usbvision-core.c - driver for NT100x USB video capture devices
   3  *
   4  *
   5  * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
   6  *                         Dwaine Garden <dwainegarden@rogers.com>
   7  *
   8  * This module is part of usbvision driver project.
   9  * Updates to driver completed by Dwaine P. Garden
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/list.h>
  28 #include <linux/timer.h>
  29 #include <linux/slab.h>
  30 #include <linux/mm.h>
  31 #include <linux/utsname.h>
  32 #include <linux/highmem.h>
  33 #include <linux/videodev.h>
  34 #include <linux/vmalloc.h>
  35 #include <linux/module.h>
  36 #include <linux/init.h>
  37 #include <linux/spinlock.h>
  38 #include <asm/io.h>
  39 #include <linux/videodev2.h>
  40 #include <linux/video_decoder.h>
  41 #include <linux/i2c.h>
  42
  43 #include <media/saa7115.h>
  44 #include <media/v4l2-common.h>
  45 #include <media/tuner.h>
  46 #include <media/audiochip.h>
  47
  48 #include <linux/moduleparam.h>
  49 #include <linux/workqueue.h>
  50
  51 #ifdef CONFIG_KMOD
  52 #include <linux/kmod.h>
  53 #endif
  54
  55 #include "usbvision.h"
  56
  57 static unsigned int core_debug = 0;
  58 module_param(core_debug,int,0644);
  59 MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
  60
  61 static unsigned int force_testpattern = 0;
  62 module_param(force_testpattern,int,0644);
  63 MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]");
  64
  65 static int adjustCompression = 1;                       // Set the compression to be adaptive
  66 module_param(adjustCompression, int, 0444);
  67 MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device.  Default: 1 (On)");
  68
  69 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.
  70 module_param(SwitchSVideoInput, int, 0444);
  71 MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input.  Some cables and input device are wired differently. Default: 0 (Off)");
  72
  73 #define ENABLE_HEXDUMP  0       /* Enable if you need it */
  74
  75
  76 #ifdef USBVISION_DEBUG
  77         #define PDEBUG(level, fmt, args...) \
  78                 if (core_debug & (level)) info("[%s:%d] " fmt, __PRETTY_FUNCTION__, __LINE__ , ## args)
  79 #else
  80         #define PDEBUG(level, fmt, args...) do {} while(0)
  81 #endif
  82
  83 #define DBG_HEADER      1<<0
  84 #define DBG_IRQ         1<<1
  85 #define DBG_ISOC        1<<2
  86 #define DBG_PARSE       1<<3
  87 #define DBG_SCRATCH     1<<4
  88 #define DBG_FUNC        1<<5
  89
  90 static const int max_imgwidth = MAX_FRAME_WIDTH;
  91 static const int max_imgheight = MAX_FRAME_HEIGHT;
  92 static const int min_imgwidth = MIN_FRAME_WIDTH;
  93 static const int min_imgheight = MIN_FRAME_HEIGHT;
  94
  95 /* The value of 'scratch_buf_size' affects quality of the picture
  96  * in many ways. Shorter buffers may cause loss of data when client
  97  * is too slow. Larger buffers are memory-consuming and take longer
  98  * to work with. This setting can be adjusted, but the default value
  99  * should be OK for most desktop users.
 100  */
 101 #define DEFAULT_SCRATCH_BUF_SIZE        (0x20000)               // 128kB memory scratch buffer
 102 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
 103
 104 // Function prototypes
 105 static int usbvision_request_intra (struct usb_usbvision *usbvision);
 106 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision);
 107 static int usbvision_adjust_compression (struct usb_usbvision *usbvision);
 108 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision);
 109
 110 /*******************************/
 111 /* Memory management functions */
 112 /*******************************/
 113
 114 /*
 115  * Here we want the physical address of the memory.
 116  * This is used when initializing the contents of the area.
 117  */
 118
 119 static void *usbvision_rvmalloc(unsigned long size)
 120 {
 121         void *mem;
 122         unsigned long adr;
 123
 124         size = PAGE_ALIGN(size);
 125         mem = vmalloc_32(size);
 126         if (!mem)
 127                 return NULL;
 128
 129         memset(mem, 0, size); /* Clear the ram out, no junk to the user */
 130         adr = (unsigned long) mem;
 131         while (size > 0) {
 132                 SetPageReserved(vmalloc_to_page((void *)adr));
 133                 adr += PAGE_SIZE;
 134                 size -= PAGE_SIZE;
 135         }
 136
 137         return mem;
 138 }
 139
 140 static void usbvision_rvfree(void *mem, unsigned long size)
 141 {
 142         unsigned long adr;
 143
 144         if (!mem)
 145                 return;
 146
 147         size = PAGE_ALIGN(size);
 148
 149         adr = (unsigned long) mem;
 150         while ((long) size > 0) {
 151                 ClearPageReserved(vmalloc_to_page((void *)adr));
 152                 adr += PAGE_SIZE;
 153                 size -= PAGE_SIZE;
 154         }
 155
 156         vfree(mem);
 157 }
 158
 159
 160
 161 #if ENABLE_HEXDUMP
 162 static void usbvision_hexdump(const unsigned char *data, int len)
 163 {
 164         char tmp[80];
 165         int i, k;
 166
 167         for (i = k = 0; len > 0; i++, len--) {
 168                 if (i > 0 && (i % 16 == 0)) {
 169                         printk("%s\n", tmp);
 170                         k = 0;
 171                 }
 172                 k += sprintf(&tmp[k], "%02x ", data[i]);
 173         }
 174         if (k > 0)
 175                 printk("%s\n", tmp);
 176 }
 177 #endif
 178
 179 /********************************
 180  * scratch ring buffer handling
 181  ********************************/
 182 static int scratch_len(struct usb_usbvision *usbvision)    /*This returns the amount of data actually in the buffer */
 183 {
 184         int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
 185         if (len < 0) {
 186                 len += scratch_buf_size;
 187         }
 188         PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
 189
 190         return len;
 191 }
 192
 193
 194 /* This returns the free space left in the buffer */
 195 static int scratch_free(struct usb_usbvision *usbvision)
 196 {
 197         int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
 198         if (free <= 0) {
 199                 free += scratch_buf_size;
 200         }
 201         if (free) {
 202                 free -= 1;                                                      /* at least one byte in the buffer must */
 203                                                                                 /* left blank, otherwise there is no chance to differ between full and empty */
 204         }
 205         PDEBUG(DBG_SCRATCH, "return %d\n", free);
 206
 207         return free;
 208 }
 209
 210
 211 /* This puts data into the buffer */
 212 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
 213                        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 static 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 static int scratch_get_extra(struct usb_usbvision *usbvision,
 251                              unsigned char *data, int *ptr, int len)
 252 {
 253         int len_part;
 254         if (*ptr + len < scratch_buf_size) {
 255                 memcpy(data, usbvision->scratch + *ptr, len);
 256                 *ptr += len;
 257         }
 258         else {
 259                 len_part = scratch_buf_size - *ptr;
 260                 memcpy(data, usbvision->scratch + *ptr, len_part);
 261                 if (len == len_part) {
 262                         *ptr = 0;                                                       /* just set the y_ptr to zero */
 263                 }
 264                 else {
 265                         memcpy(data + len_part, usbvision->scratch, len - len_part);
 266                         *ptr = len - len_part;
 267                 }
 268         }
 269
 270         PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
 271
 272         return len;
 273 }
 274
 275
 276 /* This sets the scratch extra read pointer */
 277 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
 278                                   int len)
 279 {
 280         *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size;
 281
 282         PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
 283 }
 284
 285
 286 /*This increments the scratch extra read pointer */
 287 static void scratch_inc_extra_ptr(int *ptr, int len)
 288 {
 289         *ptr = (*ptr + len) % scratch_buf_size;
 290
 291         PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
 292 }
 293
 294
 295 /* This gets data from the buffer */
 296 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
 297                        int len)
 298 {
 299         int len_part;
 300         if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
 301                 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
 302                 usbvision->scratch_read_ptr += len;
 303         }
 304         else {
 305                 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
 306                 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
 307                 if (len == len_part) {
 308                         usbvision->scratch_read_ptr = 0;                                /* just set the read_ptr to zero */
 309                 }
 310                 else {
 311                         memcpy(data + len_part, usbvision->scratch, len - len_part);
 312                         usbvision->scratch_read_ptr = len - len_part;
 313                 }
 314         }
 315
 316         PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
 317
 318         return len;
 319 }
 320
 321
 322 /* This sets read pointer to next header and returns it */
 323 static int scratch_get_header(struct usb_usbvision *usbvision,
 324                               struct usbvision_frame_header *header)
 325 {
 326         int errCode = 0;
 327
 328         PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
 329
 330         while (usbvision->scratch_headermarker_write_ptr -
 331                 usbvision->scratch_headermarker_read_ptr != 0) {
 332                 usbvision->scratch_read_ptr =
 333                         usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
 334                 usbvision->scratch_headermarker_read_ptr += 1;
 335                 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
 336                 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
 337                 if ((header->magic_1 == USBVISION_MAGIC_1)
 338                          && (header->magic_2 == USBVISION_MAGIC_2)
 339                          && (header->headerLength == USBVISION_HEADER_LENGTH)) {
 340                         errCode = USBVISION_HEADER_LENGTH;
 341                         header->frameWidth  = header->frameWidthLo  + (header->frameWidthHi << 8);
 342                         header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8);
 343                         break;
 344                 }
 345         }
 346
 347         return errCode;
 348 }
 349
 350
 351 /*This removes len bytes of old data from the buffer */
 352 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
 353 {
 354
 355         usbvision->scratch_read_ptr += len;
 356         usbvision->scratch_read_ptr %= scratch_buf_size;
 357         PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
 358 }
 359
 360
 361 /*This resets the buffer - kills all data in it too */
 362 static void scratch_reset(struct usb_usbvision *usbvision)
 363 {
 364         PDEBUG(DBG_SCRATCH, "\n");
 365
 366         usbvision->scratch_read_ptr = 0;
 367         usbvision->scratch_write_ptr = 0;
 368         usbvision->scratch_headermarker_read_ptr = 0;
 369         usbvision->scratch_headermarker_write_ptr = 0;
 370         usbvision->isocstate = IsocState_NoFrame;
 371 }
 372
 373 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
 374 {
 375         usbvision->scratch = vmalloc_32(scratch_buf_size);
 376         scratch_reset(usbvision);
 377         if(usbvision->scratch == NULL) {
 378                 err("%s: unable to allocate %d bytes for scratch",
 379                     __FUNCTION__, scratch_buf_size);
 380                 return -ENOMEM;
 381         }
 382         return 0;
 383 }
 384
 385 void usbvision_scratch_free(struct usb_usbvision *usbvision)
 386 {
 387         if (usbvision->scratch != NULL) {
 388                 vfree(usbvision->scratch);
 389                 usbvision->scratch = NULL;
 390         }
 391 }
 392
 393 /*
 394  * usbvision_testpattern()
 395  *
 396  * Procedure forms a test pattern (yellow grid on blue background).
 397  *
 398  * Parameters:
 399  * fullframe:   if TRUE then entire frame is filled, otherwise the procedure
 400  *              continues from the current scanline.
 401  * pmode        0: fill the frame with solid blue color (like on VCR or TV)
 402  *              1: Draw a colored grid
 403  *
 404  */
 405 static void usbvision_testpattern(struct usb_usbvision *usbvision,
 406                                   int fullframe, int pmode)
 407 {
 408         static const char proc[] = "usbvision_testpattern";
 409         struct usbvision_frame *frame;
 410         unsigned char *f;
 411         int num_cell = 0;
 412         int scan_length = 0;
 413         static int num_pass = 0;
 414
 415         if (usbvision == NULL) {
 416                 printk(KERN_ERR "%s: usbvision == NULL\n", proc);
 417                 return;
 418         }
 419         if (usbvision->curFrame == NULL) {
 420                 printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc);
 421                 return;
 422         }
 423
 424         /* Grab the current frame */
 425         frame = usbvision->curFrame;
 426
 427         /* Optionally start at the beginning */
 428         if (fullframe) {
 429                 frame->curline = 0;
 430                 frame->scanlength = 0;
 431         }
 432
 433         /* Form every scan line */
 434         for (; frame->curline < frame->frmheight; frame->curline++) {
 435                 int i;
 436
 437                 f = frame->data + (usbvision->curwidth * 3 * frame->curline);
 438                 for (i = 0; i < usbvision->curwidth; i++) {
 439                         unsigned char cb = 0x80;
 440                         unsigned char cg = 0;
 441                         unsigned char cr = 0;
 442
 443                         if (pmode == 1) {
 444                                 if (frame->curline % 32 == 0)
 445                                         cb = 0, cg = cr = 0xFF;
 446                                 else if (i % 32 == 0) {
 447                                         if (frame->curline % 32 == 1)
 448                                                 num_cell++;
 449                                         cb = 0, cg = cr = 0xFF;
 450                                 } else {
 451                                         cb =
 452                                             ((num_cell * 7) +
 453                                              num_pass) & 0xFF;
 454                                         cg =
 455                                             ((num_cell * 5) +
 456                                              num_pass * 2) & 0xFF;
 457                                         cr =
 458                                             ((num_cell * 3) +
 459                                              num_pass * 3) & 0xFF;
 460                                 }
 461                         } else {
 462                                 /* Just the blue screen */
 463                         }
 464
 465                         *f++ = cb;
 466                         *f++ = cg;
 467                         *f++ = cr;
 468                         scan_length += 3;
 469                 }
 470         }
 471
 472         frame->grabstate = FrameState_Done;
 473         frame->scanlength += scan_length;
 474         ++num_pass;
 475
 476 }
 477
 478 /*
 479  * usbvision_decompress_alloc()
 480  *
 481  * allocates intermediate buffer for decompression
 482  */
 483 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
 484 {
 485         int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
 486         usbvision->IntraFrameBuffer = vmalloc_32(IFB_size);
 487         if (usbvision->IntraFrameBuffer == NULL) {
 488                 err("%s: unable to allocate %d for compr. frame buffer", __FUNCTION__, IFB_size);
 489                 return -ENOMEM;
 490         }
 491         return 0;
 492 }
 493
 494 /*
 495  * usbvision_decompress_free()
 496  *
 497  * frees intermediate buffer for decompression
 498  */
 499 void usbvision_decompress_free(struct usb_usbvision *usbvision)
 500 {
 501         if (usbvision->IntraFrameBuffer != NULL) {
 502                 vfree(usbvision->IntraFrameBuffer);
 503                 usbvision->IntraFrameBuffer = NULL;
 504         }
 505 }
 506
 507 /************************************************************
 508  * Here comes the data parsing stuff that is run as interrupt
 509  ************************************************************/
 510 /*
 511  * usbvision_find_header()
 512  *
 513  * Locate one of supported header markers in the scratch buffer.
 514  */
 515 static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision)
 516 {
 517         struct usbvision_frame *frame;
 518         int foundHeader = 0;
 519
 520         frame = usbvision->curFrame;
 521
 522         while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) {
 523                 // found header in scratch
 524                 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
 525                                 frame->isocHeader.magic_2,
 526                                 frame->isocHeader.magic_1,
 527                                 frame->isocHeader.headerLength,
 528                                 frame->isocHeader.frameNum,
 529                                 frame->isocHeader.framePhase,
 530                                 frame->isocHeader.frameLatency,
 531                                 frame->isocHeader.dataFormat,
 532                                 frame->isocHeader.formatParam,
 533                                 frame->isocHeader.frameWidth,
 534                                 frame->isocHeader.frameHeight);
 535
 536                 if (usbvision->requestIntra) {
 537                         if (frame->isocHeader.formatParam & 0x80) {
 538                                 foundHeader = 1;
 539                                 usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time
 540                                 usbvision_unrequest_intra(usbvision);
 541                                 break;
 542                         }
 543                 }
 544                 else {
 545                         foundHeader = 1;
 546                         break;
 547                 }
 548         }
 549
 550         if (foundHeader) {
 551                 frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width;
 552                 frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height;
 553                 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3;
 554         }
 555         else { // no header found
 556                 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
 557                 scratch_reset(usbvision);
 558                 return ParseState_EndParse;
 559         }
 560
 561         // found header
 562         if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) {
 563                 //check isocHeader.frameNum for lost frames
 564                 if (usbvision->lastIsocFrameNum >= 0) {
 565                         if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) {
 566                                 // unexpected frame drop: need to request new intra frame
 567                                 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum);
 568                                 usbvision_request_intra(usbvision);
 569                                 return ParseState_NextFrame;
 570                         }
 571                 }
 572                 usbvision->lastIsocFrameNum = frame->isocHeader.frameNum;
 573         }
 574         usbvision->header_count++;
 575         frame->scanstate = ScanState_Lines;
 576         frame->curline = 0;
 577
 578         if (force_testpattern) {
 579                 usbvision_testpattern(usbvision, 1, 1);
 580                 return ParseState_NextFrame;
 581         }
 582         return ParseState_Continue;
 583 }
 584
 585 static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision,
 586                                            long *pcopylen)
 587 {
 588         volatile struct usbvision_frame *frame;
 589         unsigned char *f;
 590         int len;
 591         int i;
 592         unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components
 593         unsigned char rv, gv, bv;       // RGB components
 594         int clipmask_index, bytes_per_pixel;
 595         int stretch_bytes, clipmask_add;
 596
 597         frame  = usbvision->curFrame;
 598         f = frame->data + (frame->v4l2_linesize * frame->curline);
 599
 600         /* Make sure there's enough data for the entire line */
 601         len = (frame->isocHeader.frameWidth * 2)+5;
 602         if (scratch_len(usbvision) < len) {
 603                 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
 604                 return ParseState_Out;
 605         }
 606
 607         if ((frame->curline + 1) >= frame->frmheight) {
 608                 return ParseState_NextFrame;
 609         }
 610
 611         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
 612         stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
 613         clipmask_index = frame->curline * MAX_FRAME_WIDTH;
 614         clipmask_add = usbvision->stretch_width;
 615
 616         for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) {
 617
 618                 scratch_get(usbvision, &yuyv[0], 4);
 619
 620                 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 621                         *f++ = yuyv[0]; // Y
 622                         *f++ = yuyv[3]; // U
 623                 }
 624                 else {
 625
 626                         YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
 627                         switch (frame->v4l2_format.format) {
 628                                 case V4L2_PIX_FMT_RGB565:
 629                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
 630                                         *f++ = (0x07 & (gv >> 5)) | (0xF8 &  rv);
 631                                         break;
 632                                 case V4L2_PIX_FMT_RGB24:
 633                                         *f++ = bv;
 634                                         *f++ = gv;
 635                                         *f++ = rv;
 636                                         break;
 637                                 case V4L2_PIX_FMT_RGB32:
 638                                         *f++ = bv;
 639                                         *f++ = gv;
 640                                         *f++ = rv;
 641                                         f++;
 642                                         break;
 643                                 case V4L2_PIX_FMT_RGB555:
 644                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
 645                                         *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
 646                                         break;
 647                         }
 648                 }
 649                 clipmask_index += clipmask_add;
 650                 f += stretch_bytes;
 651
 652                 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 653                         *f++ = yuyv[2]; // Y
 654                         *f++ = yuyv[1]; // V
 655                 }
 656                 else {
 657
 658                         YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
 659                         switch (frame->v4l2_format.format) {
 660                                 case V4L2_PIX_FMT_RGB565:
 661                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
 662                                         *f++ = (0x07 & (gv >> 5)) | (0xF8 &  rv);
 663                                         break;
 664                                 case V4L2_PIX_FMT_RGB24:
 665                                         *f++ = bv;
 666                                         *f++ = gv;
 667                                         *f++ = rv;
 668                                         break;
 669                                 case V4L2_PIX_FMT_RGB32:
 670                                         *f++ = bv;
 671                                         *f++ = gv;
 672                                         *f++ = rv;
 673                                         f++;
 674                                         break;
 675                                 case V4L2_PIX_FMT_RGB555:
 676                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
 677                                         *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
 678                                         break;
 679                         }
 680                 }
 681                 clipmask_index += clipmask_add;
 682                 f += stretch_bytes;
 683         }
 684
 685         frame->curline += usbvision->stretch_height;
 686         *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
 687
 688         if (frame->curline >= frame->frmheight) {
 689                 return ParseState_NextFrame;
 690         }
 691         else {
 692                 return ParseState_Continue;
 693         }
 694 }
 695
 696 /* The decompression routine  */
 697 static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed,
 698                                                                 unsigned char *Decompressed, int *StartPos,
 699                                                                 int *BlockTypeStartPos, int Len)
 700 {
 701         int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen;
 702         unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator;
 703
 704         Integrator = 0;
 705         Pos = *StartPos;
 706         BlockTypePos = *BlockTypeStartPos;
 707         MaxPos = 396; //Pos + Len;
 708         ExtraPos = Pos;
 709         BlockLen = 0;
 710         BlockByte = 0;
 711         BlockCode = 0;
 712         BlockType = 0;
 713         BlockTypeByte = 0;
 714         BlockTypeLen = 0;
 715         RestPixel = Len;
 716
 717         for (Idx = 0; Idx < Len; Idx++) {
 718
 719                 if (BlockLen == 0) {
 720                         if (BlockTypeLen==0) {
 721                                 BlockTypeByte = Compressed[BlockTypePos];
 722                                 BlockTypePos++;
 723                                 BlockTypeLen = 4;
 724                         }
 725                         BlockType = (BlockTypeByte & 0xC0) >> 6;
 726
 727                         //statistic:
 728                         usbvision->ComprBlockTypes[BlockType]++;
 729
 730                         Pos = ExtraPos;
 731                         if (BlockType == 0) {
 732                                 if(RestPixel >= 24) {
 733                                         Idx += 23;
 734                                         RestPixel -= 24;
 735                                         Integrator = Decompressed[Idx];
 736                                 } else {
 737                                         Idx += RestPixel - 1;
 738                                         RestPixel = 0;
 739                                 }
 740                         } else {
 741                                 BlockCode = Compressed[Pos];
 742                                 Pos++;
 743                                 if (RestPixel >= 24) {
 744                                         BlockLen  = 24;
 745                                 } else {
 746                                         BlockLen = RestPixel;
 747                                 }
 748                                 RestPixel -= BlockLen;
 749                                 ExtraPos = Pos + (BlockLen / 4);
 750                         }
 751                         BlockTypeByte <<= 2;
 752                         BlockTypeLen -= 1;
 753                 }
 754                 if (BlockLen > 0) {
 755                         if ((BlockLen%4) == 0) {
 756                                 BlockByte = Compressed[Pos];
 757                                 Pos++;
 758                         }
 759                         if (BlockType == 1) { //inter Block
 760                                 Integrator = Decompressed[Idx];
 761                         }
 762                         switch (BlockByte & 0xC0) {
 763                                 case 0x03<<6:
 764                                         Integrator += Compressed[ExtraPos];
 765                                         ExtraPos++;
 766                                         break;
 767                                 case 0x02<<6:
 768                                         Integrator += BlockCode;
 769                                         break;
 770                                 case 0x00:
 771                                         Integrator -= BlockCode;
 772                                         break;
 773                         }
 774                         Decompressed[Idx] = Integrator;
 775                         BlockByte <<= 2;
 776                         BlockLen -= 1;
 777                 }
 778         }
 779         *StartPos = ExtraPos;
 780         *BlockTypeStartPos = BlockTypePos;
 781         return Idx;
 782 }
 783
 784
 785 /*
 786  * usbvision_parse_compress()
 787  *
 788  * Parse compressed frame from the scratch buffer, put
 789  * decoded RGB value into the current frame buffer and add the written
 790  * number of bytes (RGB) to the *pcopylen.
 791  *
 792  */
 793 static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision,
 794                                            long *pcopylen)
 795 {
 796 #define USBVISION_STRIP_MAGIC           0x5A
 797 #define USBVISION_STRIP_LEN_MAX         400
 798 #define USBVISION_STRIP_HEADER_LEN      3
 799
 800         struct usbvision_frame *frame;
 801         unsigned char *f,*u = NULL ,*v = NULL;
 802         unsigned char StripData[USBVISION_STRIP_LEN_MAX];
 803         unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN];
 804         int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos;
 805         int clipmask_index, bytes_per_pixel, rc;
 806         int imageSize;
 807         unsigned char rv, gv, bv;
 808         static unsigned char *Y, *U, *V;
 809
 810         frame  = usbvision->curFrame;
 811         imageSize = frame->frmwidth * frame->frmheight;
 812         if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
 813              (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) {       // this is a planar format
 814                 //... v4l2_linesize not used here.
 815                 f = frame->data + (frame->width * frame->curline);
 816         } else
 817                 f = frame->data + (frame->v4l2_linesize * frame->curline);
 818
 819         if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers
 820                 // get base of u and b planes add halfoffset
 821
 822                 u = frame->data
 823                         + imageSize
 824                         + (frame->frmwidth >>1) * frame->curline ;
 825                 v = u + (imageSize >>1 );
 826
 827         } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){
 828
 829                 v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ;
 830                 u = v + (imageSize >>2) ;
 831         }
 832
 833         if (frame->curline == 0) {
 834                 usbvision_adjust_compression(usbvision);
 835         }
 836
 837         if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) {
 838                 return ParseState_Out;
 839         }
 840
 841         //get strip header without changing the scratch_read_ptr
 842         scratch_set_extra_ptr(usbvision, &StripPtr, 0);
 843         scratch_get_extra(usbvision, &StripHeader[0], &StripPtr,
 844                                 USBVISION_STRIP_HEADER_LEN);
 845
 846         if (StripHeader[0] != USBVISION_STRIP_MAGIC) {
 847                 // wrong strip magic
 848                 usbvision->stripMagicErrors++;
 849                 return ParseState_NextFrame;
 850         }
 851
 852         if (frame->curline != (int)StripHeader[2]) {
 853                 //line number missmatch error
 854                 usbvision->stripLineNumberErrors++;
 855         }
 856
 857         StripLen = 2 * (unsigned int)StripHeader[1];
 858         if (StripLen > USBVISION_STRIP_LEN_MAX) {
 859                 // strip overrun
 860                 // I think this never happens
 861                 usbvision_request_intra(usbvision);
 862         }
 863
 864         if (scratch_len(usbvision) < StripLen) {
 865                 //there is not enough data for the strip
 866                 return ParseState_Out;
 867         }
 868
 869         if (usbvision->IntraFrameBuffer) {
 870                 Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline;
 871                 U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2);
 872                 V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
 873         }
 874         else {
 875                 return ParseState_NextFrame;
 876         }
 877
 878         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
 879         clipmask_index = frame->curline * MAX_FRAME_WIDTH;
 880
 881         scratch_get(usbvision, StripData, StripLen);
 882
 883         IdxEnd = frame->frmwidth;
 884         BlockTypePos = USBVISION_STRIP_HEADER_LEN;
 885         StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2;
 886         BlockPos = StartBlockPos;
 887
 888         usbvision->BlockPos = BlockPos;
 889
 890         if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) {
 891                 //return ParseState_Continue;
 892         }
 893         if (StripLen > usbvision->maxStripLen) {
 894                 usbvision->maxStripLen = StripLen;
 895         }
 896
 897         if (frame->curline%2) {
 898                 if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
 899                 //return ParseState_Continue;
 900                 }
 901         }
 902         else {
 903                 if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
 904                         //return ParseState_Continue;
 905                 }
 906         }
 907
 908         if (BlockPos > usbvision->comprBlockPos) {
 909                 usbvision->comprBlockPos = BlockPos;
 910         }
 911         if (BlockPos > StripLen) {
 912                 usbvision->stripLenErrors++;
 913         }
 914
 915         for (Idx = 0; Idx < IdxEnd; Idx++) {
 916                 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 917                         *f++ = Y[Idx];
 918                         *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2];
 919                 }
 920                 else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
 921                         *f++ = Y[Idx];
 922                         if ( Idx & 0x01)
 923                                 *u++ = U[Idx>>1] ;
 924                         else
 925                                 *v++ = V[Idx>>1];
 926                 }
 927                 else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
 928                         *f++ = Y [Idx];
 929                         if ( !((  Idx & 0x01  ) | (  frame->curline & 0x01  )) ){
 930
 931 /*                               only need do this for 1 in 4 pixels */
 932 /*                               intraframe buffer is YUV420 format */
 933
 934                                 *u++ = U[Idx >>1];
 935                                 *v++ = V[Idx >>1];
 936                         }
 937
 938                 }
 939                 else {
 940                         YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv);
 941                         switch (frame->v4l2_format.format) {
 942                                 case V4L2_PIX_FMT_GREY:
 943                                         *f++ = Y[Idx];
 944                                         break;
 945                                 case V4L2_PIX_FMT_RGB555:
 946                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
 947                                         *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
 948                                         break;
 949                                 case V4L2_PIX_FMT_RGB565:
 950                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
 951                                         *f++ = (0x07 & (gv >> 5)) | (0xF8 &  rv);
 952                                         break;
 953                                 case V4L2_PIX_FMT_RGB24:
 954                                         *f++ = bv;
 955                                         *f++ = gv;
 956                                         *f++ = rv;
 957                                         break;
 958                                 case V4L2_PIX_FMT_RGB32:
 959                                         *f++ = bv;
 960                                         *f++ = gv;
 961                                         *f++ = rv;
 962                                         f++;
 963                                         break;
 964                         }
 965                 }
 966                 clipmask_index++;
 967         }
 968         /* Deal with non-integer no. of bytes for YUV420P */
 969         if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 )
 970                 *pcopylen += frame->v4l2_linesize;
 971         else
 972                 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
 973
 974         frame->curline += 1;
 975
 976         if (frame->curline >= frame->frmheight) {
 977                 return ParseState_NextFrame;
 978         }
 979         else {
 980                 return ParseState_Continue;
 981         }
 982
 983 }
 984
 985
 986 /*
 987  * usbvision_parse_lines_420()
 988  *
 989  * Parse two lines from the scratch buffer, put
 990  * decoded RGB value into the current frame buffer and add the written
 991  * number of bytes (RGB) to the *pcopylen.
 992  *
 993  */
 994 static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision,
 995                                            long *pcopylen)
 996 {
 997         struct usbvision_frame *frame;
 998         unsigned char *f_even = NULL, *f_odd = NULL;
 999         unsigned int pixel_per_line, block;
1000         int pixel, block_split;
1001         int y_ptr, u_ptr, v_ptr, y_odd_offset;
1002         const int   y_block_size = 128;
1003         const int  uv_block_size = 64;
1004         const int sub_block_size = 32;
1005         const int y_step[] = { 0, 0, 0, 2 },  y_step_size = 4;
1006         const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4;
1007         unsigned char y[2], u, v;       /* YUV components */
1008         int y_, u_, v_, vb, uvg, ur;
1009         int r_, g_, b_;                 /* RGB components */
1010         unsigned char g;
1011         int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
1012         int clipmask_add, stretch_bytes;
1013
1014         frame  = usbvision->curFrame;
1015         f_even = frame->data + (frame->v4l2_linesize * frame->curline);
1016         f_odd  = f_even + frame->v4l2_linesize * usbvision->stretch_height;
1017
1018         /* Make sure there's enough data for the entire line */
1019         /* In this mode usbvision transfer 3 bytes for every 2 pixels */
1020         /* I need two lines to decode the color */
1021         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
1022         stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
1023         clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
1024         clipmask_odd_index  = clipmask_even_index + MAX_FRAME_WIDTH;
1025         clipmask_add = usbvision->stretch_width;
1026         pixel_per_line = frame->isocHeader.frameWidth;
1027
1028         if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
1029                 //printk(KERN_DEBUG "out of data, need %d\n", len);
1030                 return ParseState_Out;
1031         }
1032
1033         if ((frame->curline + 1) >= frame->frmheight) {
1034                 return ParseState_NextFrame;
1035         }
1036
1037         block_split = (pixel_per_line%y_block_size) ? 1 : 0;    //are some blocks splitted into different lines?
1038
1039         y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
1040                         + block_split * uv_block_size;
1041
1042         scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
1043         scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
1044         scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
1045                         + (4 - block_split) * sub_block_size);
1046
1047         for (block = 0; block < (pixel_per_line / sub_block_size);
1048              block++) {
1049
1050
1051                 for (pixel = 0; pixel < sub_block_size; pixel +=2) {
1052                         scratch_get(usbvision, &y[0], 2);
1053                         scratch_get_extra(usbvision, &u, &u_ptr, 1);
1054                         scratch_get_extra(usbvision, &v, &v_ptr, 1);
1055
1056                         //I don't use the YUV_TO_RGB macro for better performance
1057                         v_ = v - 128;
1058                         u_ = u - 128;
1059                         vb =              132252 * v_;
1060                         uvg= -53281 * u_ - 25625 * v_;
1061                         ur = 104595 * u_;
1062
1063                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1064                                 *f_even++ = y[0];
1065                                 *f_even++ = v;
1066                         }
1067                         else {
1068                                 y_ = 76284 * (y[0] - 16);
1069
1070                                 b_ = (y_ + vb) >> 16;
1071                                 g_ = (y_ + uvg)>> 16;
1072                                 r_ = (y_ + ur) >> 16;
1073
1074                                 switch (frame->v4l2_format.format) {
1075                                         case V4L2_PIX_FMT_RGB565:
1076                                                 g = LIMIT_RGB(g_);
1077                                                 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1078                                                 *f_even++ = (0x07 & (          g   >> 5)) | (0xF8 & LIMIT_RGB(r_));
1079                                                 break;
1080                                         case V4L2_PIX_FMT_RGB24:
1081                                                 *f_even++ = LIMIT_RGB(b_);
1082                                                 *f_even++ = LIMIT_RGB(g_);
1083                                                 *f_even++ = LIMIT_RGB(r_);
1084                                                 break;
1085                                         case V4L2_PIX_FMT_RGB32:
1086                                                 *f_even++ = LIMIT_RGB(b_);
1087                                                 *f_even++ = LIMIT_RGB(g_);
1088                                                 *f_even++ = LIMIT_RGB(r_);
1089                                                 f_even++;
1090                                                 break;
1091                                         case V4L2_PIX_FMT_RGB555:
1092                                                 g = LIMIT_RGB(g_);
1093                                                 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1094                                                 *f_even++ = (0x03 & (          g   >> 6)) |
1095                                                             (0x7C & (LIMIT_RGB(r_) >> 1));
1096                                                 break;
1097                                 }
1098                         }
1099                         clipmask_even_index += clipmask_add;
1100                         f_even += stretch_bytes;
1101
1102                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1103                                 *f_even++ = y[1];
1104                                 *f_even++ = u;
1105                         }
1106                         else {
1107                                 y_ = 76284 * (y[1] - 16);
1108
1109                                 b_ = (y_ + vb) >> 16;
1110                                 g_ = (y_ + uvg)>> 16;
1111                                 r_ = (y_ + ur) >> 16;
1112
1113                                 switch (frame->v4l2_format.format) {
1114                                         case V4L2_PIX_FMT_RGB565:
1115                                                 g = LIMIT_RGB(g_);
1116                                                 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1117                                                 *f_even++ = (0x07 & (          g   >> 5)) | (0xF8 & LIMIT_RGB(r_));
1118                                                 break;
1119                                         case V4L2_PIX_FMT_RGB24:
1120                                                 *f_even++ = LIMIT_RGB(b_);
1121                                                 *f_even++ = LIMIT_RGB(g_);
1122                                                 *f_even++ = LIMIT_RGB(r_);
1123                                                 break;
1124                                         case V4L2_PIX_FMT_RGB32:
1125                                                 *f_even++ = LIMIT_RGB(b_);
1126                                                 *f_even++ = LIMIT_RGB(g_);
1127                                                 *f_even++ = LIMIT_RGB(r_);
1128                                                 f_even++;
1129                                                 break;
1130                                         case V4L2_PIX_FMT_RGB555:
1131                                                 g = LIMIT_RGB(g_);
1132                                                 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1133                                                 *f_even++ = (0x03 & (          g   >> 6)) |
1134                                                             (0x7C & (LIMIT_RGB(r_) >> 1));
1135                                                 break;
1136                                 }
1137                         }
1138                         clipmask_even_index += clipmask_add;
1139                         f_even += stretch_bytes;
1140
1141                         scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1142
1143                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1144                                 *f_odd++ = y[0];
1145                                 *f_odd++ = v;
1146                         }
1147                         else {
1148                                 y_ = 76284 * (y[0] - 16);
1149
1150                                 b_ = (y_ + vb) >> 16;
1151                                 g_ = (y_ + uvg)>> 16;
1152                                 r_ = (y_ + ur) >> 16;
1153
1154                                 switch (frame->v4l2_format.format) {
1155                                         case V4L2_PIX_FMT_RGB565:
1156                                                 g = LIMIT_RGB(g_);
1157                                                 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1158                                                 *f_odd++ = (0x07 & (          g   >> 5)) | (0xF8 & LIMIT_RGB(r_));
1159                                                 break;
1160                                         case V4L2_PIX_FMT_RGB24:
1161                                                 *f_odd++ = LIMIT_RGB(b_);
1162                                                 *f_odd++ = LIMIT_RGB(g_);
1163                                                 *f_odd++ = LIMIT_RGB(r_);
1164                                                 break;
1165                                         case V4L2_PIX_FMT_RGB32:
1166                                                 *f_odd++ = LIMIT_RGB(b_);
1167                                                 *f_odd++ = LIMIT_RGB(g_);
1168                                                 *f_odd++ = LIMIT_RGB(r_);
1169                                                 f_odd++;
1170                                                 break;
1171                                         case V4L2_PIX_FMT_RGB555:
1172                                                 g = LIMIT_RGB(g_);
1173                                                 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1174                                                 *f_odd++ = (0x03 & (          g   >> 6)) |
1175                                                            (0x7C & (LIMIT_RGB(r_) >> 1));
1176                                                 break;
1177                                 }
1178                         }
1179                         clipmask_odd_index += clipmask_add;
1180                         f_odd += stretch_bytes;
1181
1182                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1183                                 *f_odd++ = y[1];
1184                                 *f_odd++ = u;
1185                         }
1186                         else {
1187                                 y_ = 76284 * (y[1] - 16);
1188
1189                                 b_ = (y_ + vb) >> 16;
1190                                 g_ = (y_ + uvg)>> 16;
1191                                 r_ = (y_ + ur) >> 16;
1192
1193                                 switch (frame->v4l2_format.format) {
1194                                         case V4L2_PIX_FMT_RGB565:
1195                                                 g = LIMIT_RGB(g_);
1196                                                 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1197                                                 *f_odd++ = (0x07 & (          g   >> 5)) | (0xF8 & LIMIT_RGB(r_));
1198                                                 break;
1199                                         case V4L2_PIX_FMT_RGB24:
1200                                                 *f_odd++ = LIMIT_RGB(b_);
1201                                                 *f_odd++ = LIMIT_RGB(g_);
1202                                                 *f_odd++ = LIMIT_RGB(r_);
1203                                                 break;
1204                                         case V4L2_PIX_FMT_RGB32:
1205                                                 *f_odd++ = LIMIT_RGB(b_);
1206                                                 *f_odd++ = LIMIT_RGB(g_);
1207                                                 *f_odd++ = LIMIT_RGB(r_);
1208                                                 f_odd++;
1209                                                 break;
1210                                         case V4L2_PIX_FMT_RGB555:
1211                                                 g = LIMIT_RGB(g_);
1212                                                 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1213                                                 *f_odd++ = (0x03 & (          g   >> 6)) |
1214                                                            (0x7C & (LIMIT_RGB(r_) >> 1));
1215                                                 break;
1216                                 }
1217                         }
1218                         clipmask_odd_index += clipmask_add;
1219                         f_odd += stretch_bytes;
1220                 }
1221
1222                 scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size);
1223                 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1224                                 * sub_block_size);
1225                 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1226                                 * sub_block_size);
1227                 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1228                                 * sub_block_size);
1229         }
1230
1231         scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1232                         + block_split * sub_block_size);
1233
1234         frame->curline += 2 * usbvision->stretch_height;
1235         *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1236
1237         if (frame->curline >= frame->frmheight)
1238                 return ParseState_NextFrame;
1239         else
1240                 return ParseState_Continue;
1241 }
1242
1243 /*
1244  * usbvision_parse_data()
1245  *
1246  * Generic routine to parse the scratch buffer. It employs either
1247  * usbvision_find_header() or usbvision_parse_lines() to do most
1248  * of work.
1249  *
1250  */
1251 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1252 {
1253         struct usbvision_frame *frame;
1254         enum ParseState newstate;
1255         long copylen = 0;
1256         unsigned long lock_flags;
1257
1258         frame = usbvision->curFrame;
1259
1260         PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1261
1262         while (1) {
1263
1264                 newstate = ParseState_Out;
1265                 if (scratch_len(usbvision)) {
1266                         if (frame->scanstate == ScanState_Scanning) {
1267                                 newstate = usbvision_find_header(usbvision);
1268                         }
1269                         else if (frame->scanstate == ScanState_Lines) {
1270                                 if (usbvision->isocMode == ISOC_MODE_YUV420) {
1271                                         newstate = usbvision_parse_lines_420(usbvision, &copylen);
1272                                 }
1273                                 else if (usbvision->isocMode == ISOC_MODE_YUV422) {
1274                                         newstate = usbvision_parse_lines_422(usbvision, &copylen);
1275                                 }
1276                                 else if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
1277                                         newstate = usbvision_parse_compress(usbvision, &copylen);
1278                                 }
1279
1280                         }
1281                 }
1282                 if (newstate == ParseState_Continue) {
1283                         continue;
1284                 }
1285                 else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) {
1286                         break;
1287                 }
1288                 else {
1289                         return; /* ParseState_EndParse */
1290                 }
1291         }
1292
1293         if (newstate == ParseState_NextFrame) {
1294                 frame->grabstate = FrameState_Done;
1295                 do_gettimeofday(&(frame->timestamp));
1296                 frame->sequence = usbvision->frame_num;
1297
1298                 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1299                 list_move_tail(&(frame->frame), &usbvision->outqueue);
1300                 usbvision->curFrame = NULL;
1301                 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1302
1303                 usbvision->frame_num++;
1304
1305                 /* This will cause the process to request another frame. */
1306                 if (waitqueue_active(&usbvision->wait_frame)) {
1307                         PDEBUG(DBG_PARSE, "Wake up !");
1308                         wake_up_interruptible(&usbvision->wait_frame);
1309                 }
1310         }
1311         else
1312                 frame->grabstate = FrameState_Grabbing;
1313
1314
1315         /* Update the frame's uncompressed length. */
1316         frame->scanlength += copylen;
1317 }
1318
1319
1320 /*
1321  * Make all of the blocks of data contiguous
1322  */
1323 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1324                                           struct urb *urb)
1325 {
1326         unsigned char *packet_data;
1327         int i, totlen = 0;
1328
1329         for (i = 0; i < urb->number_of_packets; i++) {
1330                 int packet_len = urb->iso_frame_desc[i].actual_length;
1331                 int packet_stat = urb->iso_frame_desc[i].status;
1332
1333                 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1334
1335                 /* Detect and ignore errored packets */
1336                 if (packet_stat) {      // packet_stat != 0 ?????????????
1337                         PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1338                         usbvision->isocErrCount++;
1339                         continue;
1340                 }
1341
1342                 /* Detect and ignore empty packets */
1343                 if (packet_len < 0) {
1344                         PDEBUG(DBG_ISOC, "error packet [%d]", i);
1345                         usbvision->isocSkipCount++;
1346                         continue;
1347                 }
1348                 else if (packet_len == 0) {     /* Frame end ????? */
1349                         PDEBUG(DBG_ISOC, "null packet [%d]", i);
1350                         usbvision->isocstate=IsocState_NoFrame;
1351                         usbvision->isocSkipCount++;
1352                         continue;
1353                 }
1354                 else if (packet_len > usbvision->isocPacketSize) {
1355                         PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i);
1356                         usbvision->isocSkipCount++;
1357                         continue;
1358                 }
1359
1360                 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1361
1362                 if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins
1363                         usbvision->isocstate=IsocState_InFrame;
1364                         scratch_mark_header(usbvision);
1365                         usbvision_measure_bandwidth(usbvision);
1366                         PDEBUG(DBG_ISOC, "packet with header");
1367                 }
1368
1369                 /*
1370                  * If usbvision continues to feed us with data but there is no
1371                  * consumption (if, for example, V4L client fell asleep) we
1372                  * may overflow the buffer. We have to move old data over to
1373                  * free room for new data. This is bad for old data. If we
1374                  * just drop new data then it's bad for new data... choose
1375                  * your favorite evil here.
1376                  */
1377                 if (scratch_free(usbvision) < packet_len) {
1378
1379                         usbvision->scratch_ovf_count++;
1380                         PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1381                                scratch_len(usbvision), packet_len);
1382                         scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1383                 }
1384
1385                 /* Now we know that there is enough room in scratch buffer */
1386                 scratch_put(usbvision, packet_data, packet_len);
1387                 totlen += packet_len;
1388                 usbvision->isocDataCount += packet_len;
1389                 usbvision->isocPacketCount++;
1390         }
1391 #if ENABLE_HEXDUMP
1392         if (totlen > 0) {
1393                 static int foo = 0;
1394                 if (foo < 1) {
1395                         printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1396                         usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1397                         ++foo;
1398                 }
1399         }
1400 #endif
1401  return totlen;
1402 }
1403
1404 static void usbvision_isocIrq(struct urb *urb)
1405 {
1406         int errCode = 0;
1407         int len;
1408         struct usb_usbvision *usbvision = urb->context;
1409         int i;
1410         unsigned long startTime = jiffies;
1411         struct usbvision_frame **f;
1412
1413         /* We don't want to do anything if we are about to be removed! */
1414         if (!USBVISION_IS_OPERATIONAL(usbvision))
1415                 return;
1416
1417         f = &usbvision->curFrame;
1418
1419         /* Manage streaming interruption */
1420         if (usbvision->streaming == Stream_Interrupt) {
1421                 usbvision->streaming = Stream_Idle;
1422                 if ((*f)) {
1423                         (*f)->grabstate = FrameState_Ready;
1424                         (*f)->scanstate = ScanState_Scanning;
1425                 }
1426                 PDEBUG(DBG_IRQ, "stream interrupted");
1427                 wake_up_interruptible(&usbvision->wait_stream);
1428         }
1429
1430         /* Copy the data received into our scratch buffer */
1431         len = usbvision_compress_isochronous(usbvision, urb);
1432
1433         usbvision->isocUrbCount++;
1434         usbvision->urb_length = len;
1435
1436         if (usbvision->streaming == Stream_On) {
1437
1438                 /* If we collected enough data let's parse! */
1439                 if (scratch_len(usbvision) > USBVISION_HEADER_LENGTH) { /* 12 == header_length */
1440                         /*If we don't have a frame we're current working on, complain */
1441                         if(!list_empty(&(usbvision->inqueue))) {
1442                                 if (!(*f)) {
1443                                         (*f) = list_entry(usbvision->inqueue.next,struct usbvision_frame, frame);
1444                                 }
1445                                 usbvision_parse_data(usbvision);
1446                         }
1447                         else {
1448                                 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1449                                 scratch_reset(usbvision);
1450                         }
1451                 }
1452         }
1453         else {
1454                 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1455                 scratch_reset(usbvision);
1456         }
1457
1458         usbvision->timeInIrq += jiffies - startTime;
1459
1460         for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1461                 urb->iso_frame_desc[i].status = 0;
1462                 urb->iso_frame_desc[i].actual_length = 0;
1463         }
1464
1465         urb->status = 0;
1466         urb->dev = usbvision->dev;
1467         errCode = usb_submit_urb (urb, GFP_ATOMIC);
1468
1469         /* Disable this warning.  By design of the driver. */
1470         //      if(errCode) {
1471         //              err("%s: usb_submit_urb failed: error %d", __FUNCTION__, errCode);
1472         //      }
1473
1474         return;
1475 }
1476
1477 /*************************************/
1478 /* Low level usbvision access functions */
1479 /*************************************/
1480
1481 /*
1482  * usbvision_read_reg()
1483  *
1484  * return  < 0 -> Error
1485  *        >= 0 -> Data
1486  */
1487
1488 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1489 {
1490         int errCode = 0;
1491         unsigned char buffer[1];
1492
1493         if (!USBVISION_IS_OPERATIONAL(usbvision))
1494                 return -1;
1495
1496         errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1497                                 USBVISION_OP_CODE,
1498                                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1499                                 0, (__u16) reg, buffer, 1, HZ);
1500
1501         if (errCode < 0) {
1502                 err("%s: failed: error %d", __FUNCTION__, errCode);
1503                 return errCode;
1504         }
1505         return buffer[0];
1506 }
1507
1508 /*
1509  * usbvision_write_reg()
1510  *
1511  * return 1 -> Reg written
1512  *        0 -> usbvision is not yet ready
1513  *       -1 -> Something went wrong
1514  */
1515
1516 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1517                             unsigned char value)
1518 {
1519         int errCode = 0;
1520
1521         if (!USBVISION_IS_OPERATIONAL(usbvision))
1522                 return 0;
1523
1524         errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1525                                 USBVISION_OP_CODE,
1526                                 USB_DIR_OUT | USB_TYPE_VENDOR |
1527                                 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
1528
1529         if (errCode < 0) {
1530                 err("%s: failed: error %d", __FUNCTION__, errCode);
1531         }
1532         return errCode;
1533 }
1534
1535
1536 static void usbvision_ctrlUrb_complete(struct urb *urb)
1537 {
1538         struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1539
1540         PDEBUG(DBG_IRQ, "");
1541         usbvision->ctrlUrbBusy = 0;
1542         if (waitqueue_active(&usbvision->ctrlUrb_wq)) {
1543                 wake_up_interruptible(&usbvision->ctrlUrb_wq);
1544         }
1545 }
1546
1547
1548 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address,
1549                                                                         unsigned char *data, int len)
1550 {
1551         int errCode = 0;
1552
1553         PDEBUG(DBG_IRQ, "");
1554         if (len > 8) {
1555                 return -EFAULT;
1556         }
1557 //      down(&usbvision->ctrlUrbLock);
1558         if (usbvision->ctrlUrbBusy) {
1559 //              up(&usbvision->ctrlUrbLock);
1560                 return -EBUSY;
1561         }
1562         usbvision->ctrlUrbBusy = 1;
1563 //      up(&usbvision->ctrlUrbLock);
1564
1565         usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1566         usbvision->ctrlUrbSetup.bRequest     = USBVISION_OP_CODE;
1567         usbvision->ctrlUrbSetup.wValue       = 0;
1568         usbvision->ctrlUrbSetup.wIndex       = cpu_to_le16(address);
1569         usbvision->ctrlUrbSetup.wLength      = cpu_to_le16(len);
1570         usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev,
1571                                                         usb_sndctrlpipe(usbvision->dev, 1),
1572                                                         (unsigned char *)&usbvision->ctrlUrbSetup,
1573                                                         (void *)usbvision->ctrlUrbBuffer, len,
1574                                                         usbvision_ctrlUrb_complete,
1575                                                         (void *)usbvision);
1576
1577         memcpy(usbvision->ctrlUrbBuffer, data, len);
1578
1579         errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC);
1580         if (errCode < 0) {
1581                 // error in usb_submit_urb()
1582                 usbvision->ctrlUrbBusy = 0;
1583         }
1584         PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode);
1585         return errCode;
1586 }
1587
1588
1589 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1590 {
1591         int errCode = 0;
1592
1593         usbvision->lastIsocFrameNum = -1;
1594         usbvision->isocDataCount = 0;
1595         usbvision->isocPacketCount = 0;
1596         usbvision->isocSkipCount = 0;
1597         usbvision->comprLevel = 50;
1598         usbvision->lastComprLevel = -1;
1599         usbvision->isocUrbCount = 0;
1600         usbvision->requestIntra = 1;
1601         usbvision->isocMeasureBandwidthCount = 0;
1602
1603         return errCode;
1604 }
1605
1606 /* this function measures the used bandwidth since last call
1607  * return:    0 : no error
1608  * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize
1609  */
1610 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision)
1611 {
1612         int errCode = 0;
1613
1614         if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames
1615                 usbvision->isocMeasureBandwidthCount++;
1616                 return errCode;
1617         }
1618         if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) {
1619                 usbvision->usedBandwidth = usbvision->isocDataCount /
1620                                         (usbvision->isocPacketCount + usbvision->isocSkipCount) *
1621                                         100 / usbvision->isocPacketSize;
1622         }
1623         usbvision->isocMeasureBandwidthCount = 0;
1624         usbvision->isocDataCount = 0;
1625         usbvision->isocPacketCount = 0;
1626         usbvision->isocSkipCount = 0;
1627         return errCode;
1628 }
1629
1630 static int usbvision_adjust_compression (struct usb_usbvision *usbvision)
1631 {
1632         int errCode = 0;
1633         unsigned char buffer[6];
1634
1635         PDEBUG(DBG_IRQ, "");
1636         if ((adjustCompression) && (usbvision->usedBandwidth > 0)) {
1637                 usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2;
1638                 RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100);
1639                 if (usbvision->comprLevel != usbvision->lastComprLevel) {
1640                         int distorsion;
1641                         if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) {
1642                                 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100);      // PCM Threshold 1
1643                                 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100);       // PCM Threshold 2
1644                                 distorsion = 7 + 248 * usbvision->comprLevel / 100;
1645                                 buffer[2] = (unsigned char)(distorsion & 0xFF);                         // Average distorsion Threshold (inter)
1646                                 buffer[3] = (unsigned char)(distorsion & 0xFF);                         // Average distorsion Threshold (intra)
1647                                 distorsion = 1 + 42 * usbvision->comprLevel / 100;
1648                                 buffer[4] = (unsigned char)(distorsion & 0xFF);                         // Maximum distorsion Threshold (inter)
1649                                 buffer[5] = (unsigned char)(distorsion & 0xFF);                         // Maximum distorsion Threshold (intra)
1650                         }
1651                         else { //BRIDGE_NT1003
1652                                 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100);      // PCM threshold 1
1653                                 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100);       // PCM threshold 2
1654                                 distorsion = 2 + 253 * usbvision->comprLevel / 100;
1655                                 buffer[2] = (unsigned char)(distorsion & 0xFF);                         // distorsion threshold bit0-7
1656                                 buffer[3] = 0;  //(unsigned char)((distorsion >> 8) & 0x0F);            // distorsion threshold bit 8-11
1657                                 distorsion = 0 + 43 * usbvision->comprLevel / 100;
1658                                 buffer[4] = (unsigned char)(distorsion & 0xFF);                         // maximum distorsion bit0-7
1659                                 buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01);             // maximum distorsion bit 8
1660                         }
1661                         errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1662                         if (errCode == 0){
1663                                 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1664                                                                 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1665                                 usbvision->lastComprLevel = usbvision->comprLevel;
1666                         }
1667                 }
1668         }
1669         return errCode;
1670 }
1671
1672 static int usbvision_request_intra (struct usb_usbvision *usbvision)
1673 {
1674         int errCode = 0;
1675         unsigned char buffer[1];
1676
1677         PDEBUG(DBG_IRQ, "");
1678         usbvision->requestIntra = 1;
1679         buffer[0] = 1;
1680         usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1681         return errCode;
1682 }
1683
1684 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision)
1685 {
1686         int errCode = 0;
1687         unsigned char buffer[1];
1688
1689         PDEBUG(DBG_IRQ, "");
1690         usbvision->requestIntra = 0;
1691         buffer[0] = 0;
1692         usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1693         return errCode;
1694 }
1695
1696 /*******************************
1697  * usbvision utility functions
1698  *******************************/
1699
1700 int usbvision_power_off(struct usb_usbvision *usbvision)
1701 {
1702         int errCode = 0;
1703
1704         PDEBUG(DBG_FUNC, "");
1705
1706         errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1707         if (errCode == 1) {
1708                 usbvision->power = 0;
1709         }
1710         PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode);
1711         return errCode;
1712 }
1713
1714 /*
1715  * usbvision_set_video_format()
1716  *
1717  */
1718 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1719 {
1720         static const char proc[] = "usbvision_set_video_format";
1721         int rc;
1722         unsigned char value[2];
1723
1724         if (!USBVISION_IS_OPERATIONAL(usbvision))
1725                 return 0;
1726
1727         PDEBUG(DBG_FUNC, "isocMode %#02x", format);
1728
1729         if ((format != ISOC_MODE_YUV422)
1730             && (format != ISOC_MODE_YUV420)
1731             && (format != ISOC_MODE_COMPRESS)) {
1732                 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1733                        format);
1734                 format = ISOC_MODE_YUV420;
1735         }
1736         value[0] = 0x0A;  //TODO: See the effect of the filter
1737         value[1] = format;
1738         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1739                              USBVISION_OP_CODE,
1740                              USB_DIR_OUT | USB_TYPE_VENDOR |
1741                              USB_RECIP_ENDPOINT, 0,
1742                              (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1743
1744         if (rc < 0) {
1745                 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1746                        "reconnect or reload driver.\n", proc, rc);
1747         }
1748         usbvision->isocMode = format;
1749         return rc;
1750 }
1751
1752 /*
1753  * usbvision_set_output()
1754  *
1755  */
1756
1757 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1758                          int height)
1759 {
1760         int errCode = 0;
1761         int UsbWidth, UsbHeight;
1762         unsigned int frameRate=0, frameDrop=0;
1763         unsigned char value[4];
1764
1765         if (!USBVISION_IS_OPERATIONAL(usbvision)) {
1766                 return 0;
1767         }
1768
1769         if (width > MAX_USB_WIDTH) {
1770                 UsbWidth = width / 2;
1771                 usbvision->stretch_width = 2;
1772         }
1773         else {
1774                 UsbWidth = width;
1775                 usbvision->stretch_width = 1;
1776         }
1777
1778         if (height > MAX_USB_HEIGHT) {
1779                 UsbHeight = height / 2;
1780                 usbvision->stretch_height = 2;
1781         }
1782         else {
1783                 UsbHeight = height;
1784                 usbvision->stretch_height = 1;
1785         }
1786
1787         RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1788         UsbWidth &= ~(MIN_FRAME_WIDTH-1);
1789         RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1790         UsbHeight &= ~(1);
1791
1792         PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1793                                                 UsbWidth, UsbHeight, width, height,
1794                                                 usbvision->stretch_width, usbvision->stretch_height);
1795
1796         /* I'll not rewrite the same values */
1797         if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) {
1798                 value[0] = UsbWidth & 0xff;             //LSB
1799                 value[1] = (UsbWidth >> 8) & 0x03;      //MSB
1800                 value[2] = UsbHeight & 0xff;            //LSB
1801                 value[3] = (UsbHeight >> 8) & 0x03;     //MSB
1802
1803                 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1804                              USBVISION_OP_CODE,
1805                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1806                                  0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1807
1808                 if (errCode < 0) {
1809                         err("%s failed: error %d", __FUNCTION__, errCode);
1810                         return errCode;
1811                 }
1812                 usbvision->curwidth = usbvision->stretch_width * UsbWidth;
1813                 usbvision->curheight = usbvision->stretch_height * UsbHeight;
1814         }
1815
1816         if (usbvision->isocMode == ISOC_MODE_YUV422) {
1817                 frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2);
1818         }
1819         else if (usbvision->isocMode == ISOC_MODE_YUV420) {
1820                 frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8);
1821         }
1822         else {
1823                 frameRate = FRAMERATE_MAX;
1824         }
1825
1826         if (usbvision->tvnorm->id & V4L2_STD_625_50) {
1827                 frameDrop = frameRate * 32 / 25 - 1;
1828         }
1829         else if (usbvision->tvnorm->id & V4L2_STD_525_60) {
1830                 frameDrop = frameRate * 32 / 30 - 1;
1831         }
1832
1833         RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX);
1834
1835         PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop);
1836
1837         frameDrop = FRAMERATE_MAX;      // We can allow the maximum here, because dropping is controlled
1838
1839         /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1840                 => frameSkip = 4;
1841                 => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1842
1843            frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1844             => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1845                 => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1846         */
1847         errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop);
1848         return errCode;
1849 }
1850
1851
1852 /*
1853  * usbvision_frames_alloc
1854  * allocate the required frames
1855  */
1856 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
1857 {
1858         int i;
1859
1860         /*needs to be page aligned cause the buffers can be mapped individually! */
1861         usbvision->max_frame_size =  PAGE_ALIGN(usbvision->curwidth *
1862                                                 usbvision->curheight *
1863                                                 usbvision->palette.bytes_per_pixel);
1864
1865         /* Try to do my best to allocate the frames the user want in the remaining memory */
1866         usbvision->num_frames = number_of_frames;
1867         while (usbvision->num_frames > 0) {
1868                 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
1869                 if((usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size))) {
1870                         break;
1871                 }
1872                 usbvision->num_frames--;
1873         }
1874
1875         spin_lock_init(&usbvision->queue_lock);
1876         init_waitqueue_head(&usbvision->wait_frame);
1877         init_waitqueue_head(&usbvision->wait_stream);
1878
1879         /* Allocate all buffers */
1880         for (i = 0; i < usbvision->num_frames; i++) {
1881                 usbvision->frame[i].index = i;
1882                 usbvision->frame[i].grabstate = FrameState_Unused;
1883                 usbvision->frame[i].data = usbvision->fbuf +
1884                         i * usbvision->max_frame_size;
1885                 /*
1886                  * Set default sizes for read operation.
1887                  */
1888                 usbvision->stretch_width = 1;
1889                 usbvision->stretch_height = 1;
1890                 usbvision->frame[i].width = usbvision->curwidth;
1891                 usbvision->frame[i].height = usbvision->curheight;
1892                 usbvision->frame[i].bytes_read = 0;
1893         }
1894         PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",usbvision->num_frames,usbvision->max_frame_size);
1895         return usbvision->num_frames;
1896 }
1897
1898 /*
1899  * usbvision_frames_free
1900  * frees memory allocated for the frames
1901  */
1902 void usbvision_frames_free(struct usb_usbvision *usbvision)
1903 {
1904         /* Have to free all that memory */
1905         PDEBUG(DBG_FUNC, "free %d frames",usbvision->num_frames);
1906
1907         if (usbvision->fbuf != NULL) {
1908                 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1909                 usbvision->fbuf = NULL;
1910
1911                 usbvision->num_frames = 0;
1912         }
1913 }
1914 /*
1915  * usbvision_empty_framequeues()
1916  * prepare queues for incoming and outgoing frames
1917  */
1918 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1919 {
1920         u32 i;
1921
1922         INIT_LIST_HEAD(&(usbvision->inqueue));
1923         INIT_LIST_HEAD(&(usbvision->outqueue));
1924
1925         for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1926                 usbvision->frame[i].grabstate = FrameState_Unused;
1927                 usbvision->frame[i].bytes_read = 0;
1928         }
1929 }
1930
1931 /*
1932  * usbvision_stream_interrupt()
1933  * stops streaming
1934  */
1935 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1936 {
1937         int ret = 0;
1938
1939         /* stop reading from the device */
1940
1941         usbvision->streaming = Stream_Interrupt;
1942         ret = wait_event_timeout(usbvision->wait_stream,
1943                                  (usbvision->streaming == Stream_Idle),
1944                                  msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1945         return ret;
1946 }
1947
1948 /*
1949  * usbvision_set_compress_params()
1950  *
1951  */
1952
1953 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
1954 {
1955         static const char proc[] = "usbvision_set_compresion_params: ";
1956         int rc;
1957         unsigned char value[6];
1958
1959         value[0] = 0x0F;    // Intra-Compression cycle
1960         value[1] = 0x01;    // Reg.45 one line per strip
1961         value[2] = 0x00;    // Reg.46 Force intra mode on all new frames
1962         value[3] = 0x00;    // Reg.47 FORCE_UP <- 0 normal operation (not force)
1963         value[4] = 0xA2;    // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode.
1964         value[5] = 0x00;    // Reg.49 DVI_YUV This has nothing to do with compression
1965
1966         //catched values for NT1004
1967         // value[0] = 0xFF; // Never apply intra mode automatically
1968         // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip
1969         // value[2] = 0x01; // Force intra mode on all new frames
1970         // value[3] = 0x00; // Strip size 400 Bytes; do not force up
1971         // value[4] = 0xA2; //
1972         if (!USBVISION_IS_OPERATIONAL(usbvision))
1973                 return 0;
1974
1975         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1976                              USBVISION_OP_CODE,
1977                              USB_DIR_OUT | USB_TYPE_VENDOR |
1978                              USB_RECIP_ENDPOINT, 0,
1979                              (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
1980
1981         if (rc < 0) {
1982                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
1983                        "reconnect or reload driver.\n", proc, rc);
1984                 return rc;
1985         }
1986
1987         if (usbvision->bridgeType == BRIDGE_NT1004) {
1988                 value[0] =  20; // PCM Threshold 1
1989                 value[1] =  12; // PCM Threshold 2
1990                 value[2] = 255; // Distorsion Threshold inter
1991                 value[3] = 255; // Distorsion Threshold intra
1992                 value[4] =  43; // Max Distorsion inter
1993                 value[5] =  43; // Max Distorsion intra
1994         }
1995         else {
1996                 value[0] =  20; // PCM Threshold 1
1997                 value[1] =  12; // PCM Threshold 2
1998                 value[2] = 255; // Distorsion Threshold d7-d0
1999                 value[3] =   0; // Distorsion Threshold d11-d8
2000                 value[4] =  43; // Max Distorsion d7-d0
2001                 value[5] =   0; // Max Distorsion d8
2002         }
2003
2004         if (!USBVISION_IS_OPERATIONAL(usbvision))
2005                 return 0;
2006
2007         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2008                              USBVISION_OP_CODE,
2009                              USB_DIR_OUT | USB_TYPE_VENDOR |
2010                              USB_RECIP_ENDPOINT, 0,
2011                              (__u16) USBVISION_PCM_THR1, value, 6, HZ);
2012
2013         if (rc < 0) {
2014                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2015                        "reconnect or reload driver.\n", proc, rc);
2016                 return rc;
2017         }
2018
2019
2020         return rc;
2021 }
2022
2023
2024 /*
2025  * usbvision_set_input()
2026  *
2027  * Set the input (saa711x, ...) size x y and other misc input params
2028  * I've no idea if this parameters are right
2029  *
2030  */
2031 int usbvision_set_input(struct usb_usbvision *usbvision)
2032 {
2033         static const char proc[] = "usbvision_set_input: ";
2034         int rc;
2035         unsigned char value[8];
2036         unsigned char dvi_yuv_value;
2037
2038         if (!USBVISION_IS_OPERATIONAL(usbvision))
2039                 return 0;
2040
2041         /* Set input format expected from decoder*/
2042         if (usbvision_device_data[usbvision->DevModel].Vin_Reg1_override) {
2043                 value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1;
2044         } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2045                 /* SAA7113 uses 8 bit output */
2046                 value[0] = USBVISION_8_422_SYNC;
2047         } else {
2048                 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
2049                  * as that is how saa7111 is configured */
2050                 value[0] = USBVISION_16_422_SYNC;
2051                 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
2052         }
2053
2054         rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
2055         if (rc < 0) {
2056                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2057                        "reconnect or reload driver.\n", proc, rc);
2058                 return rc;
2059         }
2060
2061
2062         if (usbvision->tvnorm->id & V4L2_STD_PAL) {
2063                 value[0] = 0xC0;
2064                 value[1] = 0x02;        //0x02C0 -> 704 Input video line length
2065                 value[2] = 0x20;
2066                 value[3] = 0x01;        //0x0120 -> 288 Input video n. of lines
2067                 value[4] = 0x60;
2068                 value[5] = 0x00;        //0x0060 -> 96 Input video h offset
2069                 value[6] = 0x16;
2070                 value[7] = 0x00;        //0x0016 -> 22 Input video v offset
2071         } else if (usbvision->tvnorm->id & V4L2_STD_SECAM) {
2072                 value[0] = 0xC0;
2073                 value[1] = 0x02;        //0x02C0 -> 704 Input video line length
2074                 value[2] = 0x20;
2075                 value[3] = 0x01;        //0x0120 -> 288 Input video n. of lines
2076                 value[4] = 0x01;
2077                 value[5] = 0x00;        //0x0001 -> 01 Input video h offset
2078                 value[6] = 0x01;
2079                 value[7] = 0x00;        //0x0001 -> 01 Input video v offset
2080         } else {        /* V4L2_STD_NTSC */
2081                 value[0] = 0xD0;
2082                 value[1] = 0x02;        //0x02D0 -> 720 Input video line length
2083                 value[2] = 0xF0;
2084                 value[3] = 0x00;        //0x00F0 -> 240 Input video number of lines
2085                 value[4] = 0x50;
2086                 value[5] = 0x00;        //0x0050 -> 80 Input video h offset
2087                 value[6] = 0x10;
2088                 value[7] = 0x00;        //0x0010 -> 16 Input video v offset
2089         }
2090
2091         if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) {
2092                 value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff;
2093                 value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8;
2094         }
2095
2096         if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) {
2097                 value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff;
2098                 value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8;
2099         }
2100
2101         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2102                              USBVISION_OP_CODE, /* USBVISION specific code */
2103                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2104                              (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2105         if (rc < 0) {
2106                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2107                        "reconnect or reload driver.\n", proc, rc);
2108                 return rc;
2109         }
2110
2111
2112         dvi_yuv_value = 0x00;   /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2113
2114         if(usbvision_device_data[usbvision->DevModel].Dvi_yuv_override){
2115                 dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv;
2116         }
2117         else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2118         /* This changes as the fine sync control changes. Further investigation necessary */
2119                 dvi_yuv_value = 0x06;
2120         }
2121
2122         return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value));
2123 }
2124
2125
2126 /*
2127  * usbvision_set_dram_settings()
2128  *
2129  * Set the buffer address needed by the usbvision dram to operate
2130  * This values has been taken with usbsnoop.
2131  *
2132  */
2133
2134 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2135 {
2136         int rc;
2137         unsigned char value[8];
2138
2139         if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2140                 value[0] = 0x42;
2141                 value[1] = 0x71;
2142                 value[2] = 0xff;
2143                 value[3] = 0x00;
2144                 value[4] = 0x98;
2145                 value[5] = 0xe0;
2146                 value[6] = 0x71;
2147                 value[7] = 0xff;
2148                 // UR:  0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte)
2149                 // FDL: 0x00000-0x0E099 =  57498 Words
2150                 // VDW: 0x0E3FF-0x3FFFF
2151         }
2152         else {
2153                 value[0] = 0x42;
2154                 value[1] = 0x00;
2155                 value[2] = 0xff;
2156                 value[3] = 0x00;
2157                 value[4] = 0x00;
2158                 value[5] = 0x00;
2159                 value[6] = 0x00;
2160                 value[7] = 0xff;
2161         }
2162         /* These are the values of the address of the video buffer,
2163          * they have to be loaded into the USBVISION_DRM_PRM1-8
2164          *
2165          * Start address of video output buffer for read:       drm_prm1-2 -> 0x00000
2166          * End address of video output buffer for read:         drm_prm1-3 -> 0x1ffff
2167          * Start address of video frame delay buffer:           drm_prm1-4 -> 0x20000
2168          *    Only used in compressed mode
2169          * End address of video frame delay buffer:             drm_prm1-5-6 -> 0x3ffff
2170          *    Only used in compressed mode
2171          * Start address of video output buffer for write:      drm_prm1-7 -> 0x00000
2172          * End address of video output buffer for write:        drm_prm1-8 -> 0x1ffff
2173          */
2174
2175         if (!USBVISION_IS_OPERATIONAL(usbvision))
2176                 return 0;
2177
2178         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2179                              USBVISION_OP_CODE, /* USBVISION specific code */
2180                              USB_DIR_OUT | USB_TYPE_VENDOR |
2181                              USB_RECIP_ENDPOINT, 0,
2182                              (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2183
2184         if (rc < 0) {
2185                 err("%sERROR=%d", __FUNCTION__, rc);
2186                 return rc;
2187         }
2188
2189         /* Restart the video buffer logic */
2190         if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2191                                    USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0)
2192                 return rc;
2193         rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2194
2195         return rc;
2196 }
2197
2198 /*
2199  * ()
2200  *
2201  * Power on the device, enables suspend-resume logic
2202  * &  reset the isoc End-Point
2203  *
2204  */
2205
2206 int usbvision_power_on(struct usb_usbvision *usbvision)
2207 {
2208         int errCode = 0;
2209
2210         PDEBUG(DBG_FUNC, "");
2211
2212         usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2213         usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2214                          USBVISION_SSPND_EN | USBVISION_RES2);
2215
2216         usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2217                          USBVISION_SSPND_EN | USBVISION_PWR_VID);
2218         errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2219                                                 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2220         if (errCode == 1) {
2221                 usbvision->power = 1;
2222         }
2223         PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode);
2224         return errCode;
2225 }
2226
2227
2228 /*
2229  * usbvision timer stuff
2230  */
2231
2232 // to call usbvision_power_off from task queue
2233 static void call_usbvision_power_off(struct work_struct *work)
2234 {
2235         struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork);
2236
2237         PDEBUG(DBG_FUNC, "");
2238         down_interruptible(&usbvision->lock);
2239         if(usbvision->user == 0) {
2240                 usbvision_i2c_unregister(usbvision);
2241
2242                 usbvision_power_off(usbvision);
2243                 usbvision->initialized = 0;
2244         }
2245         up(&usbvision->lock);
2246 }
2247
2248 static void usbvision_powerOffTimer(unsigned long data)
2249 {
2250         struct usb_usbvision *usbvision = (void *) data;
2251
2252         PDEBUG(DBG_FUNC, "");
2253         del_timer(&usbvision->powerOffTimer);
2254         INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off);
2255         (void) schedule_work(&usbvision->powerOffWork);
2256
2257 }
2258
2259 void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision)
2260 {
2261         init_timer(&usbvision->powerOffTimer);
2262         usbvision->powerOffTimer.data = (long) usbvision;
2263         usbvision->powerOffTimer.function = usbvision_powerOffTimer;
2264 }
2265
2266 void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision)
2267 {
2268         mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME);
2269 }
2270
2271 void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision)
2272 {
2273         if (timer_pending(&usbvision->powerOffTimer)) {
2274                 del_timer(&usbvision->powerOffTimer);
2275         }
2276 }
2277
2278 /*
2279  * usbvision_begin_streaming()
2280  * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2281  * idea about the rest
2282  */
2283 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2284 {
2285         int errCode = 0;
2286
2287         if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2288                 usbvision_init_compression(usbvision);
2289         }
2290         errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID |
2291                                                                                 usbvision->Vin_Reg2_Preset);
2292         return errCode;
2293 }
2294
2295 /*
2296  * usbvision_restart_isoc()
2297  * Not sure yet if touching here PWR_REG make loose the config
2298  */
2299
2300 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2301 {
2302         int ret;
2303
2304         if (
2305             (ret =
2306              usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2307                               USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0)
2308                 return ret;
2309         if (
2310             (ret =
2311              usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2312                               USBVISION_SSPND_EN | USBVISION_PWR_VID |
2313                               USBVISION_RES2)) < 0)
2314                 return ret;
2315         if (
2316             (ret =
2317              usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2318                               USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2319                                   usbvision->Vin_Reg2_Preset)) < 0) return ret;
2320
2321         /* TODO: schedule timeout */
2322         while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1);
2323
2324         return 0;
2325 }
2326
2327 int usbvision_audio_off(struct usb_usbvision *usbvision)
2328 {
2329         if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2330                 printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n");
2331                 return -1;
2332         }
2333         usbvision->AudioMute = 0;
2334         usbvision->AudioChannel = USBVISION_AUDIO_MUTE;
2335         return 0;
2336 }
2337
2338 int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel)
2339 {
2340         if (!usbvision->AudioMute) {
2341                 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) {
2342                         printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2343                         return -1;
2344                 }
2345         }
2346         usbvision->AudioChannel = AudioChannel;
2347         return 0;
2348 }
2349
2350 int usbvision_setup(struct usb_usbvision *usbvision,int format)
2351 {
2352         usbvision_set_video_format(usbvision, format);
2353         usbvision_set_dram_settings(usbvision);
2354         usbvision_set_compress_params(usbvision);
2355         usbvision_set_input(usbvision);
2356         usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2357         usbvision_restart_isoc(usbvision);
2358
2359         /* cosas del PCM */
2360         return USBVISION_IS_OPERATIONAL(usbvision);
2361 }
2362
2363 int usbvision_set_alternate(struct usb_usbvision *dev)
2364 {
2365         int errCode, prev_alt = dev->ifaceAlt;
2366         int i;
2367
2368         dev->ifaceAlt=0;
2369         for(i=0;i< dev->num_alt; i++)
2370                 if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->ifaceAlt])
2371                         dev->ifaceAlt=i;
2372
2373         if (dev->ifaceAlt != prev_alt) {
2374                 dev->isocPacketSize = dev->alt_max_pkt_size[dev->ifaceAlt];
2375                 PDEBUG(DBG_FUNC,"setting alternate %d with wMaxPacketSize=%u", dev->ifaceAlt,dev->isocPacketSize);
2376                 errCode = usb_set_interface(dev->dev, dev->iface, dev->ifaceAlt);
2377                 if (errCode < 0) {
2378                         err ("cannot change alternate number to %d (error=%i)",
2379                                                         dev->ifaceAlt, errCode);
2380                         return errCode;
2381                 }
2382         }
2383
2384         PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isocPacketSize);
2385
2386         return 0;
2387 }
2388
2389 /*
2390  * usbvision_init_isoc()
2391  *
2392  */
2393 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2394 {
2395         struct usb_device *dev = usbvision->dev;
2396         int bufIdx, errCode, regValue;
2397         const int sb_size = USBVISION_URB_FRAMES * USBVISION_MAX_ISOC_PACKET_SIZE;
2398
2399         if (!USBVISION_IS_OPERATIONAL(usbvision))
2400                 return -EFAULT;
2401
2402         usbvision->curFrame = NULL;
2403         scratch_reset(usbvision);
2404
2405         /* Alternate interface 1 is is the biggest frame size */
2406         errCode = usbvision_set_alternate(usbvision);
2407         if (errCode < 0) {
2408                 usbvision->last_error = errCode;
2409                 return -EBUSY;
2410         }
2411
2412         regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2413
2414         usbvision->usb_bandwidth = regValue >> 1;
2415         PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth);
2416
2417
2418
2419         /* We double buffer the Iso lists */
2420
2421         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2422                 int j, k;
2423                 struct urb *urb;
2424
2425                 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2426                 if (urb == NULL) {
2427                         err("%s: usb_alloc_urb() failed", __FUNCTION__);
2428                         return -ENOMEM;
2429                 }
2430                 usbvision->sbuf[bufIdx].urb = urb;
2431                 usbvision->sbuf[bufIdx].data = usb_buffer_alloc(usbvision->dev, sb_size, GFP_KERNEL,&urb->transfer_dma);
2432                 urb->dev = dev;
2433                 urb->context = usbvision;
2434                 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2435                 urb->transfer_flags = URB_ISO_ASAP;
2436                 urb->interval = 1;
2437                 urb->transfer_buffer = usbvision->sbuf[bufIdx].data;
2438                 urb->complete = usbvision_isocIrq;
2439                 urb->number_of_packets = USBVISION_URB_FRAMES;
2440                 urb->transfer_buffer_length =
2441                     usbvision->isocPacketSize * USBVISION_URB_FRAMES;
2442                 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2443                      k += usbvision->isocPacketSize) {
2444                         urb->iso_frame_desc[j].offset = k;
2445                         urb->iso_frame_desc[j].length = usbvision->isocPacketSize;
2446                 }
2447         }
2448
2449
2450         /* Submit all URBs */
2451         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2452                         errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb, GFP_KERNEL);
2453                 if (errCode) {
2454                         err("%s: usb_submit_urb(%d) failed: error %d", __FUNCTION__, bufIdx, errCode);
2455                 }
2456         }
2457
2458         usbvision->streaming = Stream_Idle;
2459         PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x", __FUNCTION__, usbvision->video_endp);
2460         return 0;
2461 }
2462
2463 /*
2464  * usbvision_stop_isoc()
2465  *
2466  * This procedure stops streaming and deallocates URBs. Then it
2467  * activates zero-bandwidth alt. setting of the video interface.
2468  *
2469  */
2470 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2471 {
2472         int bufIdx, errCode, regValue;
2473         const int sb_size = USBVISION_URB_FRAMES * USBVISION_MAX_ISOC_PACKET_SIZE;
2474
2475         if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL))
2476                 return;
2477
2478         /* Unschedule all of the iso td's */
2479         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2480                 usb_kill_urb(usbvision->sbuf[bufIdx].urb);
2481                 if (usbvision->sbuf[bufIdx].data){
2482                         usb_buffer_free(usbvision->dev,
2483                                         sb_size,
2484                                         usbvision->sbuf[bufIdx].data,
2485                                         usbvision->sbuf[bufIdx].urb->transfer_dma);
2486                 }
2487                 usb_free_urb(usbvision->sbuf[bufIdx].urb);
2488                 usbvision->sbuf[bufIdx].urb = NULL;
2489         }
2490
2491
2492         PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __FUNCTION__);
2493         usbvision->streaming = Stream_Off;
2494
2495         if (!usbvision->remove_pending) {
2496
2497                 /* Set packet size to 0 */
2498                 usbvision->ifaceAlt=0;
2499                 errCode = usb_set_interface(usbvision->dev, usbvision->iface,
2500                                             usbvision->ifaceAlt);
2501                 if (errCode < 0) {
2502                         err("%s: usb_set_interface() failed: error %d", __FUNCTION__, errCode);
2503                         usbvision->last_error = errCode;
2504                 }
2505                 regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2506                 usbvision->isocPacketSize = (regValue == 0) ? 0 : (regValue * 64) - 1;
2507                 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", usbvision->isocPacketSize);
2508
2509                 usbvision->usb_bandwidth = regValue >> 1;
2510                 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth);
2511         }
2512 }
2513
2514 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2515 {
2516         int mode[4];
2517         int audio[]= {1, 0, 0, 0};
2518         struct v4l2_routing route;
2519         //channel 0 is TV with audiochannel 1 (tuner mono)
2520         //channel 1 is Composite with audio channel 0 (line in)
2521         //channel 2 is S-Video with audio channel 0 (line in)
2522         //channel 3 is additional video inputs to the device with audio channel 0 (line in)
2523
2524         RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2525         usbvision->ctl_input = channel;
2526           route.input = SAA7115_COMPOSITE1;
2527           route.output = 0;
2528           call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
2529           call_i2c_clients(usbvision, VIDIOC_S_INPUT, &usbvision->ctl_input);
2530
2531         // set the new channel
2532         // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video
2533         // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red
2534
2535         switch (usbvision_device_data[usbvision->DevModel].Codec) {
2536                 case CODEC_SAA7113:
2537                         if (SwitchSVideoInput) { // To handle problems with S-Video Input for some devices.  Use SwitchSVideoInput parameter when loading the module.
2538                                 mode[2] = 1;
2539                         }
2540                         else {
2541                                 mode[2] = 7;
2542                         }
2543                         if (usbvision_device_data[usbvision->DevModel].VideoChannels == 4) {
2544                                 mode[0] = 0; mode[1] = 2; mode[3] = 3;  // Special for four input devices
2545                         }
2546                         else {
2547                                 mode[0] = 0; mode[1] = 2; //modes for regular saa7113 devices
2548                         }
2549                         break;
2550                 case CODEC_SAA7111:
2551                         mode[0] = 0; mode[1] = 1; mode[2] = 7; //modes for saa7111
2552                         break;
2553                 default:
2554                         mode[0] = 0; mode[1] = 1; mode[2] = 7; //default modes
2555         }
2556         route.input = mode[channel];
2557         call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
2558         usbvision->channel = channel;
2559         usbvision_set_audio(usbvision, audio[channel]);
2560         return 0;
2561 }
2562
2563 /*
2564  * Overrides for Emacs so that we follow Linus's tabbing style.
2565  * ---------------------------------------------------------------------------
2566  * Local variables:
2567  * c-basic-offset: 8
2568  * End:
2569  */