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/smp_lock.h>
  34 #include <linux/videodev.h>
  35 #include <linux/vmalloc.h>
  36 #include <linux/module.h>
  37 #include <linux/init.h>
  38 #include <linux/spinlock.h>
  39 #include <asm/io.h>
  40 #include <linux/videodev2.h>
  41 #include <linux/video_decoder.h>
  42 #include <linux/i2c.h>
  43
  44 #include <media/saa7115.h>
  45 #include <media/v4l2-common.h>
  46 #include <media/tuner.h>
  47 #include <media/audiochip.h>
  48
  49 #include <linux/moduleparam.h>
  50 #include <linux/workqueue.h>
  51
  52 #ifdef CONFIG_KMOD
  53 #include <linux/kmod.h>
  54 #endif
  55
  56 #include "usbvision.h"
  57
  58 static unsigned int core_debug = 0;
  59 module_param(core_debug,int,0644);
  60 MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
  61
  62 static unsigned int force_testpattern = 0;
  63 module_param(force_testpattern,int,0644);
  64 MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]");
  65
  66 static int adjustCompression = 1;                       // Set the compression to be adaptive
  67 module_param(adjustCompression, int, 0444);
  68 MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device.  Default: 1 (On)");
  69
  70 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.
  71 module_param(SwitchSVideoInput, int, 0444);
  72 MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input.  Some cables and input device are wired differently. Default: 0 (Off)");
  73
  74 #define ENABLE_HEXDUMP  0       /* Enable if you need it */
  75
  76
  77 #ifdef USBVISION_DEBUG
  78         #define PDEBUG(level, fmt, args...) \
  79                 if (core_debug & (level)) info("[%s:%d] " fmt, __PRETTY_FUNCTION__, __LINE__ , ## args)
  80 #else
  81         #define PDEBUG(level, fmt, args...) do {} while(0)
  82 #endif
  83
  84 #define DBG_HEADER      1<<0
  85 #define DBG_IRQ         1<<1
  86 #define DBG_ISOC        1<<2
  87 #define DBG_PARSE       1<<3
  88 #define DBG_SCRATCH     1<<4
  89 #define DBG_FUNC        1<<5
  90
  91 static const int max_imgwidth = MAX_FRAME_WIDTH;
  92 static const int max_imgheight = MAX_FRAME_HEIGHT;
  93 static const int min_imgwidth = MIN_FRAME_WIDTH;
  94 static const int min_imgheight = MIN_FRAME_HEIGHT;
  95
  96 /* The value of 'scratch_buf_size' affects quality of the picture
  97  * in many ways. Shorter buffers may cause loss of data when client
  98  * is too slow. Larger buffers are memory-consuming and take longer
  99  * to work with. This setting can be adjusted, but the default value
 100  * should be OK for most desktop users.
 101  */
 102 #define DEFAULT_SCRATCH_BUF_SIZE        (0x20000)               // 128kB memory scratch buffer
 103 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
 104
 105 // Function prototypes
 106 static int usbvision_request_intra (struct usb_usbvision *usbvision);
 107 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision);
 108 static int usbvision_adjust_compression (struct usb_usbvision *usbvision);
 109 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision);
 110
 111 /*******************************/
 112 /* Memory management functions */
 113 /*******************************/
 114
 115 /*
 116  * Here we want the physical address of the memory.
 117  * This is used when initializing the contents of the area.
 118  */
 119
 120 static void *usbvision_rvmalloc(unsigned long size)
 121 {
 122         void *mem;
 123         unsigned long adr;
 124
 125         size = PAGE_ALIGN(size);
 126         mem = vmalloc_32(size);
 127         if (!mem)
 128                 return NULL;
 129
 130         memset(mem, 0, size); /* Clear the ram out, no junk to the user */
 131         adr = (unsigned long) mem;
 132         while (size > 0) {
 133                 SetPageReserved(vmalloc_to_page((void *)adr));
 134                 adr += PAGE_SIZE;
 135                 size -= PAGE_SIZE;
 136         }
 137
 138         return mem;
 139 }
 140
 141 static void usbvision_rvfree(void *mem, unsigned long size)
 142 {
 143         unsigned long adr;
 144
 145         if (!mem)
 146                 return;
 147
 148         size = PAGE_ALIGN(size);
 149
 150         adr = (unsigned long) mem;
 151         while ((long) size > 0) {
 152                 ClearPageReserved(vmalloc_to_page((void *)adr));
 153                 adr += PAGE_SIZE;
 154                 size -= PAGE_SIZE;
 155         }
 156
 157         vfree(mem);
 158 }
 159
 160
 161
 162 #if ENABLE_HEXDUMP
 163 static void usbvision_hexdump(const unsigned char *data, int len)
 164 {
 165         char tmp[80];
 166         int i, k;
 167
 168         for (i = k = 0; len > 0; i++, len--) {
 169                 if (i > 0 && (i % 16 == 0)) {
 170                         printk("%s\n", tmp);
 171                         k = 0;
 172                 }
 173                 k += sprintf(&tmp[k], "%02x ", data[i]);
 174         }
 175         if (k > 0)
 176                 printk("%s\n", tmp);
 177 }
 178 #endif
 179
 180 /********************************
 181  * scratch ring buffer handling
 182  ********************************/
 183 static int scratch_len(struct usb_usbvision *usbvision)    /*This returns the amount of data actually in the buffer */
 184 {
 185         int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
 186         if (len < 0) {
 187                 len += scratch_buf_size;
 188         }
 189         PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
 190
 191         return len;
 192 }
 193
 194
 195 /* This returns the free space left in the buffer */
 196 static int scratch_free(struct usb_usbvision *usbvision)
 197 {
 198         int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
 199         if (free <= 0) {
 200                 free += scratch_buf_size;
 201         }
 202         if (free) {
 203                 free -= 1;                                                      /* at least one byte in the buffer must */
 204                                                                                 /* left blank, otherwise there is no chance to differ between full and empty */
 205         }
 206         PDEBUG(DBG_SCRATCH, "return %d\n", free);
 207
 208         return free;
 209 }
 210
 211
 212 /* This puts data into the buffer */
 213 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
 214                        int len)
 215 {
 216         int len_part;
 217
 218         if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
 219                 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
 220                 usbvision->scratch_write_ptr += len;
 221         }
 222         else {
 223                 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
 224                 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
 225                 if (len == len_part) {
 226                         usbvision->scratch_write_ptr = 0;                       /* just set write_ptr to zero */
 227                 }
 228                 else {
 229                         memcpy(usbvision->scratch, data + len_part, len - len_part);
 230                         usbvision->scratch_write_ptr = len - len_part;
 231                 }
 232         }
 233
 234         PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
 235
 236         return len;
 237 }
 238
 239 /* This marks the write_ptr as position of new frame header */
 240 static void scratch_mark_header(struct usb_usbvision *usbvision)
 241 {
 242         PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
 243
 244         usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
 245                                 usbvision->scratch_write_ptr;
 246         usbvision->scratch_headermarker_write_ptr += 1;
 247         usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
 248 }
 249
 250 /* This gets data from the buffer at the given "ptr" position */
 251 static int scratch_get_extra(struct usb_usbvision *usbvision,
 252                              unsigned char *data, int *ptr, int len)
 253 {
 254         int len_part;
 255         if (*ptr + len < scratch_buf_size) {
 256                 memcpy(data, usbvision->scratch + *ptr, len);
 257                 *ptr += len;
 258         }
 259         else {
 260                 len_part = scratch_buf_size - *ptr;
 261                 memcpy(data, usbvision->scratch + *ptr, len_part);
 262                 if (len == len_part) {
 263                         *ptr = 0;                                                       /* just set the y_ptr to zero */
 264                 }
 265                 else {
 266                         memcpy(data + len_part, usbvision->scratch, len - len_part);
 267                         *ptr = len - len_part;
 268                 }
 269         }
 270
 271         PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
 272
 273         return len;
 274 }
 275
 276
 277 /* This sets the scratch extra read pointer */
 278 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
 279                                   int len)
 280 {
 281         *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size;
 282
 283         PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
 284 }
 285
 286
 287 /*This increments the scratch extra read pointer */
 288 static void scratch_inc_extra_ptr(int *ptr, int len)
 289 {
 290         *ptr = (*ptr + len) % scratch_buf_size;
 291
 292         PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
 293 }
 294
 295
 296 /* This gets data from the buffer */
 297 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
 298                        int len)
 299 {
 300         int len_part;
 301         if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
 302                 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
 303                 usbvision->scratch_read_ptr += len;
 304         }
 305         else {
 306                 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
 307                 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
 308                 if (len == len_part) {
 309                         usbvision->scratch_read_ptr = 0;                                /* just set the read_ptr to zero */
 310                 }
 311                 else {
 312                         memcpy(data + len_part, usbvision->scratch, len - len_part);
 313                         usbvision->scratch_read_ptr = len - len_part;
 314                 }
 315         }
 316
 317         PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
 318
 319         return len;
 320 }
 321
 322
 323 /* This sets read pointer to next header and returns it */
 324 static int scratch_get_header(struct usb_usbvision *usbvision,
 325                               struct usbvision_frame_header *header)
 326 {
 327         int errCode = 0;
 328
 329         PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
 330
 331         while (usbvision->scratch_headermarker_write_ptr -
 332                 usbvision->scratch_headermarker_read_ptr != 0) {
 333                 usbvision->scratch_read_ptr =
 334                         usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
 335                 usbvision->scratch_headermarker_read_ptr += 1;
 336                 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
 337                 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
 338                 if ((header->magic_1 == USBVISION_MAGIC_1)
 339                          && (header->magic_2 == USBVISION_MAGIC_2)
 340                          && (header->headerLength == USBVISION_HEADER_LENGTH)) {
 341                         errCode = USBVISION_HEADER_LENGTH;
 342                         header->frameWidth  = header->frameWidthLo  + (header->frameWidthHi << 8);
 343                         header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8);
 344                         break;
 345                 }
 346         }
 347
 348         return errCode;
 349 }
 350
 351
 352 /*This removes len bytes of old data from the buffer */
 353 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
 354 {
 355
 356         usbvision->scratch_read_ptr += len;
 357         usbvision->scratch_read_ptr %= scratch_buf_size;
 358         PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
 359 }
 360
 361
 362 /*This resets the buffer - kills all data in it too */
 363 static void scratch_reset(struct usb_usbvision *usbvision)
 364 {
 365         PDEBUG(DBG_SCRATCH, "\n");
 366
 367         usbvision->scratch_read_ptr = 0;
 368         usbvision->scratch_write_ptr = 0;
 369         usbvision->scratch_headermarker_read_ptr = 0;
 370         usbvision->scratch_headermarker_write_ptr = 0;
 371         usbvision->isocstate = IsocState_NoFrame;
 372 }
 373
 374 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
 375 {
 376         usbvision->scratch = vmalloc_32(scratch_buf_size);
 377         scratch_reset(usbvision);
 378         if(usbvision->scratch == NULL) {
 379                 err("%s: unable to allocate %d bytes for scratch",
 380                     __FUNCTION__, scratch_buf_size);
 381                 return -ENOMEM;
 382         }
 383         return 0;
 384 }
 385
 386 void usbvision_scratch_free(struct usb_usbvision *usbvision)
 387 {
 388         if (usbvision->scratch != NULL) {
 389                 vfree(usbvision->scratch);
 390                 usbvision->scratch = NULL;
 391         }
 392 }
 393
 394 /*
 395  * usbvision_testpattern()
 396  *
 397  * Procedure forms a test pattern (yellow grid on blue background).
 398  *
 399  * Parameters:
 400  * fullframe:   if TRUE then entire frame is filled, otherwise the procedure
 401  *              continues from the current scanline.
 402  * pmode        0: fill the frame with solid blue color (like on VCR or TV)
 403  *              1: Draw a colored grid
 404  *
 405  */
 406 static void usbvision_testpattern(struct usb_usbvision *usbvision,
 407                                   int fullframe, int pmode)
 408 {
 409         static const char proc[] = "usbvision_testpattern";
 410         struct usbvision_frame *frame;
 411         unsigned char *f;
 412         int num_cell = 0;
 413         int scan_length = 0;
 414         static int num_pass = 0;
 415
 416         if (usbvision == NULL) {
 417                 printk(KERN_ERR "%s: usbvision == NULL\n", proc);
 418                 return;
 419         }
 420         if (usbvision->curFrame == NULL) {
 421                 printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc);
 422                 return;
 423         }
 424
 425         /* Grab the current frame */
 426         frame = usbvision->curFrame;
 427
 428         /* Optionally start at the beginning */
 429         if (fullframe) {
 430                 frame->curline = 0;
 431                 frame->scanlength = 0;
 432         }
 433
 434         /* Form every scan line */
 435         for (; frame->curline < frame->frmheight; frame->curline++) {
 436                 int i;
 437
 438                 f = frame->data + (usbvision->curwidth * 3 * frame->curline);
 439                 for (i = 0; i < usbvision->curwidth; i++) {
 440                         unsigned char cb = 0x80;
 441                         unsigned char cg = 0;
 442                         unsigned char cr = 0;
 443
 444                         if (pmode == 1) {
 445                                 if (frame->curline % 32 == 0)
 446                                         cb = 0, cg = cr = 0xFF;
 447                                 else if (i % 32 == 0) {
 448                                         if (frame->curline % 32 == 1)
 449                                                 num_cell++;
 450                                         cb = 0, cg = cr = 0xFF;
 451                                 } else {
 452                                         cb =
 453                                             ((num_cell * 7) +
 454                                              num_pass) & 0xFF;
 455                                         cg =
 456                                             ((num_cell * 5) +
 457                                              num_pass * 2) & 0xFF;
 458                                         cr =
 459                                             ((num_cell * 3) +
 460                                              num_pass * 3) & 0xFF;
 461                                 }
 462                         } else {
 463                                 /* Just the blue screen */
 464                         }
 465
 466                         *f++ = cb;
 467                         *f++ = cg;
 468                         *f++ = cr;
 469                         scan_length += 3;
 470                 }
 471         }
 472
 473         frame->grabstate = FrameState_Done;
 474         frame->scanlength += scan_length;
 475         ++num_pass;
 476
 477 }
 478
 479 /*
 480  * usbvision_decompress_alloc()
 481  *
 482  * allocates intermediate buffer for decompression
 483  */
 484 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
 485 {
 486         int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
 487         usbvision->IntraFrameBuffer = vmalloc_32(IFB_size);
 488         if (usbvision->IntraFrameBuffer == NULL) {
 489                 err("%s: unable to allocate %d for compr. frame buffer", __FUNCTION__, IFB_size);
 490                 return -ENOMEM;
 491         }
 492         return 0;
 493 }
 494
 495 /*
 496  * usbvision_decompress_free()
 497  *
 498  * frees intermediate buffer for decompression
 499  */
 500 void usbvision_decompress_free(struct usb_usbvision *usbvision)
 501 {
 502         if (usbvision->IntraFrameBuffer != NULL) {
 503                 vfree(usbvision->IntraFrameBuffer);
 504                 usbvision->IntraFrameBuffer = NULL;
 505         }
 506 }
 507
 508 /************************************************************
 509  * Here comes the data parsing stuff that is run as interrupt
 510  ************************************************************/
 511 /*
 512  * usbvision_find_header()
 513  *
 514  * Locate one of supported header markers in the scratch buffer.
 515  */
 516 static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision)
 517 {
 518         struct usbvision_frame *frame;
 519         int foundHeader = 0;
 520
 521         frame = usbvision->curFrame;
 522
 523         while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) {
 524                 // found header in scratch
 525                 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
 526                                 frame->isocHeader.magic_2,
 527                                 frame->isocHeader.magic_1,
 528                                 frame->isocHeader.headerLength,
 529                                 frame->isocHeader.frameNum,
 530                                 frame->isocHeader.framePhase,
 531                                 frame->isocHeader.frameLatency,
 532                                 frame->isocHeader.dataFormat,
 533                                 frame->isocHeader.formatParam,
 534                                 frame->isocHeader.frameWidth,
 535                                 frame->isocHeader.frameHeight);
 536
 537                 if (usbvision->requestIntra) {
 538                         if (frame->isocHeader.formatParam & 0x80) {
 539                                 foundHeader = 1;
 540                                 usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time
 541                                 usbvision_unrequest_intra(usbvision);
 542                                 break;
 543                         }
 544                 }
 545                 else {
 546                         foundHeader = 1;
 547                         break;
 548                 }
 549         }
 550
 551         if (foundHeader) {
 552                 frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width;
 553                 frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height;
 554                 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3;
 555         }
 556         else { // no header found
 557                 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
 558                 scratch_reset(usbvision);
 559                 return ParseState_EndParse;
 560         }
 561
 562         // found header
 563         if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) {
 564                 //check isocHeader.frameNum for lost frames
 565                 if (usbvision->lastIsocFrameNum >= 0) {
 566                         if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) {
 567                                 // unexpected frame drop: need to request new intra frame
 568                                 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum);
 569                                 usbvision_request_intra(usbvision);
 570                                 return ParseState_NextFrame;
 571                         }
 572                 }
 573                 usbvision->lastIsocFrameNum = frame->isocHeader.frameNum;
 574         }
 575         usbvision->header_count++;
 576         frame->scanstate = ScanState_Lines;
 577         frame->curline = 0;
 578
 579         if (force_testpattern) {
 580                 usbvision_testpattern(usbvision, 1, 1);
 581                 return ParseState_NextFrame;
 582         }
 583         return ParseState_Continue;
 584 }
 585
 586 static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision,
 587                                            long *pcopylen)
 588 {
 589         volatile struct usbvision_frame *frame;
 590         unsigned char *f;
 591         int len;
 592         int i;
 593         unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components
 594         unsigned char rv, gv, bv;       // RGB components
 595         int clipmask_index, bytes_per_pixel;
 596         int stretch_bytes, clipmask_add;
 597
 598         frame  = usbvision->curFrame;
 599         f = frame->data + (frame->v4l2_linesize * frame->curline);
 600
 601         /* Make sure there's enough data for the entire line */
 602         len = (frame->isocHeader.frameWidth * 2)+5;
 603         if (scratch_len(usbvision) < len) {
 604                 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
 605                 return ParseState_Out;
 606         }
 607
 608         if ((frame->curline + 1) >= frame->frmheight) {
 609                 return ParseState_NextFrame;
 610         }
 611
 612         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
 613         stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
 614         clipmask_index = frame->curline * MAX_FRAME_WIDTH;
 615         clipmask_add = usbvision->stretch_width;
 616
 617         for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) {
 618
 619                 scratch_get(usbvision, &yuyv[0], 4);
 620
 621                 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 622                         *f++ = yuyv[0]; // Y
 623                         *f++ = yuyv[3]; // U
 624                 }
 625                 else {
 626
 627                         YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
 628                         switch (frame->v4l2_format.format) {
 629                                 case V4L2_PIX_FMT_RGB565:
 630                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
 631                                         *f++ = (0x07 & (gv >> 5)) | (0xF8 &  rv);
 632                                         break;
 633                                 case V4L2_PIX_FMT_RGB24:
 634                                         *f++ = bv;
 635                                         *f++ = gv;
 636                                         *f++ = rv;
 637                                         break;
 638                                 case V4L2_PIX_FMT_RGB32:
 639                                         *f++ = bv;
 640                                         *f++ = gv;
 641                                         *f++ = rv;
 642                                         f++;
 643                                         break;
 644                                 case V4L2_PIX_FMT_RGB555:
 645                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
 646                                         *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
 647                                         break;
 648                         }
 649                 }
 650                 clipmask_index += clipmask_add;
 651                 f += stretch_bytes;
 652
 653                 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 654                         *f++ = yuyv[2]; // Y
 655                         *f++ = yuyv[1]; // V
 656                 }
 657                 else {
 658
 659                         YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
 660                         switch (frame->v4l2_format.format) {
 661                                 case V4L2_PIX_FMT_RGB565:
 662                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
 663                                         *f++ = (0x07 & (gv >> 5)) | (0xF8 &  rv);
 664                                         break;
 665                                 case V4L2_PIX_FMT_RGB24:
 666                                         *f++ = bv;
 667                                         *f++ = gv;
 668                                         *f++ = rv;
 669                                         break;
 670                                 case V4L2_PIX_FMT_RGB32:
 671                                         *f++ = bv;
 672                                         *f++ = gv;
 673                                         *f++ = rv;
 674                                         f++;
 675                                         break;
 676                                 case V4L2_PIX_FMT_RGB555:
 677                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
 678                                         *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
 679                                         break;
 680                         }
 681                 }
 682                 clipmask_index += clipmask_add;
 683                 f += stretch_bytes;
 684         }
 685
 686         frame->curline += usbvision->stretch_height;
 687         *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
 688
 689         if (frame->curline >= frame->frmheight) {
 690                 return ParseState_NextFrame;
 691         }
 692         else {
 693                 return ParseState_Continue;
 694         }
 695 }
 696
 697 /* The decompression routine  */
 698 static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed,
 699                                                                 unsigned char *Decompressed, int *StartPos,
 700                                                                 int *BlockTypeStartPos, int Len)
 701 {
 702         int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen;
 703         unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator;
 704
 705         Integrator = 0;
 706         Pos = *StartPos;
 707         BlockTypePos = *BlockTypeStartPos;
 708         MaxPos = 396; //Pos + Len;
 709         ExtraPos = Pos;
 710         BlockLen = 0;
 711         BlockByte = 0;
 712         BlockCode = 0;
 713         BlockType = 0;
 714         BlockTypeByte = 0;
 715         BlockTypeLen = 0;
 716         RestPixel = Len;
 717
 718         for (Idx = 0; Idx < Len; Idx++) {
 719
 720                 if (BlockLen == 0) {
 721                         if (BlockTypeLen==0) {
 722                                 BlockTypeByte = Compressed[BlockTypePos];
 723                                 BlockTypePos++;
 724                                 BlockTypeLen = 4;
 725                         }
 726                         BlockType = (BlockTypeByte & 0xC0) >> 6;
 727
 728                         //statistic:
 729                         usbvision->ComprBlockTypes[BlockType]++;
 730
 731                         Pos = ExtraPos;
 732                         if (BlockType == 0) {
 733                                 if(RestPixel >= 24) {
 734                                         Idx += 23;
 735                                         RestPixel -= 24;
 736                                         Integrator = Decompressed[Idx];
 737                                 } else {
 738                                         Idx += RestPixel - 1;
 739                                         RestPixel = 0;
 740                                 }
 741                         } else {
 742                                 BlockCode = Compressed[Pos];
 743                                 Pos++;
 744                                 if (RestPixel >= 24) {
 745                                         BlockLen  = 24;
 746                                 } else {
 747                                         BlockLen = RestPixel;
 748                                 }
 749                                 RestPixel -= BlockLen;
 750                                 ExtraPos = Pos + (BlockLen / 4);
 751                         }
 752                         BlockTypeByte <<= 2;
 753                         BlockTypeLen -= 1;
 754                 }
 755                 if (BlockLen > 0) {
 756                         if ((BlockLen%4) == 0) {
 757                                 BlockByte = Compressed[Pos];
 758                                 Pos++;
 759                         }
 760                         if (BlockType == 1) { //inter Block
 761                                 Integrator = Decompressed[Idx];
 762                         }
 763                         switch (BlockByte & 0xC0) {
 764                                 case 0x03<<6:
 765                                         Integrator += Compressed[ExtraPos];
 766                                         ExtraPos++;
 767                                         break;
 768                                 case 0x02<<6:
 769                                         Integrator += BlockCode;
 770                                         break;
 771                                 case 0x00:
 772                                         Integrator -= BlockCode;
 773                                         break;
 774                         }
 775                         Decompressed[Idx] = Integrator;
 776                         BlockByte <<= 2;
 777                         BlockLen -= 1;
 778                 }
 779         }
 780         *StartPos = ExtraPos;
 781         *BlockTypeStartPos = BlockTypePos;
 782         return Idx;
 783 }
 784
 785
 786 /*
 787  * usbvision_parse_compress()
 788  *
 789  * Parse compressed frame from the scratch buffer, put
 790  * decoded RGB value into the current frame buffer and add the written
 791  * number of bytes (RGB) to the *pcopylen.
 792  *
 793  */
 794 static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision,
 795                                            long *pcopylen)
 796 {
 797 #define USBVISION_STRIP_MAGIC           0x5A
 798 #define USBVISION_STRIP_LEN_MAX         400
 799 #define USBVISION_STRIP_HEADER_LEN      3
 800
 801         struct usbvision_frame *frame;
 802         unsigned char *f,*u = NULL ,*v = NULL;
 803         unsigned char StripData[USBVISION_STRIP_LEN_MAX];
 804         unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN];
 805         int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos;
 806         int clipmask_index, bytes_per_pixel, rc;
 807         int imageSize;
 808         unsigned char rv, gv, bv;
 809         static unsigned char *Y, *U, *V;
 810
 811         frame  = usbvision->curFrame;
 812         imageSize = frame->frmwidth * frame->frmheight;
 813         if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
 814              (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) {       // this is a planar format
 815                 //... v4l2_linesize not used here.
 816                 f = frame->data + (frame->width * frame->curline);
 817         } else
 818                 f = frame->data + (frame->v4l2_linesize * frame->curline);
 819
 820         if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers
 821                 // get base of u and b planes add halfoffset
 822
 823                 u = frame->data
 824                         + imageSize
 825                         + (frame->frmwidth >>1) * frame->curline ;
 826                 v = u + (imageSize >>1 );
 827
 828         } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){
 829
 830                 v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ;
 831                 u = v + (imageSize >>2) ;
 832         }
 833
 834         if (frame->curline == 0) {
 835                 usbvision_adjust_compression(usbvision);
 836         }
 837
 838         if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) {
 839                 return ParseState_Out;
 840         }
 841
 842         //get strip header without changing the scratch_read_ptr
 843         scratch_set_extra_ptr(usbvision, &StripPtr, 0);
 844         scratch_get_extra(usbvision, &StripHeader[0], &StripPtr,
 845                                 USBVISION_STRIP_HEADER_LEN);
 846
 847         if (StripHeader[0] != USBVISION_STRIP_MAGIC) {
 848                 // wrong strip magic
 849                 usbvision->stripMagicErrors++;
 850                 return ParseState_NextFrame;
 851         }
 852
 853         if (frame->curline != (int)StripHeader[2]) {
 854                 //line number missmatch error
 855                 usbvision->stripLineNumberErrors++;
 856         }
 857
 858         StripLen = 2 * (unsigned int)StripHeader[1];
 859         if (StripLen > USBVISION_STRIP_LEN_MAX) {
 860                 // strip overrun
 861                 // I think this never happens
 862                 usbvision_request_intra(usbvision);
 863         }
 864
 865         if (scratch_len(usbvision) < StripLen) {
 866                 //there is not enough data for the strip
 867                 return ParseState_Out;
 868         }
 869
 870         if (usbvision->IntraFrameBuffer) {
 871                 Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline;
 872                 U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2);
 873                 V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
 874         }
 875         else {
 876                 return ParseState_NextFrame;
 877         }
 878
 879         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
 880         clipmask_index = frame->curline * MAX_FRAME_WIDTH;
 881
 882         scratch_get(usbvision, StripData, StripLen);
 883
 884         IdxEnd = frame->frmwidth;
 885         BlockTypePos = USBVISION_STRIP_HEADER_LEN;
 886         StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2;
 887         BlockPos = StartBlockPos;
 888
 889         usbvision->BlockPos = BlockPos;
 890
 891         if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) {
 892                 //return ParseState_Continue;
 893         }
 894         if (StripLen > usbvision->maxStripLen) {
 895                 usbvision->maxStripLen = StripLen;
 896         }
 897
 898         if (frame->curline%2) {
 899                 if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
 900                 //return ParseState_Continue;
 901                 }
 902         }
 903         else {
 904                 if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
 905                         //return ParseState_Continue;
 906                 }
 907         }
 908
 909         if (BlockPos > usbvision->comprBlockPos) {
 910                 usbvision->comprBlockPos = BlockPos;
 911         }
 912         if (BlockPos > StripLen) {
 913                 usbvision->stripLenErrors++;
 914         }
 915
 916         for (Idx = 0; Idx < IdxEnd; Idx++) {
 917                 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 918                         *f++ = Y[Idx];
 919                         *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2];
 920                 }
 921                 else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
 922                         *f++ = Y[Idx];
 923                         if ( Idx & 0x01)
 924                                 *u++ = U[Idx>>1] ;
 925                         else
 926                                 *v++ = V[Idx>>1];
 927                 }
 928                 else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
 929                         *f++ = Y [Idx];
 930                         if ( !((  Idx & 0x01  ) | (  frame->curline & 0x01  )) ){
 931
 932 /*                               only need do this for 1 in 4 pixels */
 933 /*                               intraframe buffer is YUV420 format */
 934
 935                                 *u++ = U[Idx >>1];
 936                                 *v++ = V[Idx >>1];
 937                         }
 938
 939                 }
 940                 else {
 941                         YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv);
 942                         switch (frame->v4l2_format.format) {
 943                                 case V4L2_PIX_FMT_GREY:
 944                                         *f++ = Y[Idx];
 945                                         break;
 946                                 case V4L2_PIX_FMT_RGB555:
 947                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
 948                                         *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
 949                                         break;
 950                                 case V4L2_PIX_FMT_RGB565:
 951                                         *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
 952                                         *f++ = (0x07 & (gv >> 5)) | (0xF8 &  rv);
 953                                         break;
 954                                 case V4L2_PIX_FMT_RGB24:
 955                                         *f++ = bv;
 956                                         *f++ = gv;
 957                                         *f++ = rv;
 958                                         break;
 959                                 case V4L2_PIX_FMT_RGB32:
 960                                         *f++ = bv;
 961                                         *f++ = gv;
 962                                         *f++ = rv;
 963                                         f++;
 964                                         break;
 965                         }
 966                 }
 967                 clipmask_index++;
 968         }
 969         /* Deal with non-integer no. of bytes for YUV420P */
 970         if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 )
 971                 *pcopylen += frame->v4l2_linesize;
 972         else
 973                 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
 974
 975         frame->curline += 1;
 976
 977         if (frame->curline >= frame->frmheight) {
 978                 return ParseState_NextFrame;
 979         }
 980         else {
 981                 return ParseState_Continue;
 982         }
 983
 984 }
 985
 986
 987 /*
 988  * usbvision_parse_lines_420()
 989  *
 990  * Parse two lines from the scratch buffer, put
 991  * decoded RGB value into the current frame buffer and add the written
 992  * number of bytes (RGB) to the *pcopylen.
 993  *
 994  */
 995 static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision,
 996                                            long *pcopylen)
 997 {
 998         struct usbvision_frame *frame;
 999         unsigned char *f_even = NULL, *f_odd = NULL;
1000         unsigned int pixel_per_line, block;
1001         int pixel, block_split;
1002         int y_ptr, u_ptr, v_ptr, y_odd_offset;
1003         const int   y_block_size = 128;
1004         const int  uv_block_size = 64;
1005         const int sub_block_size = 32;
1006         const int y_step[] = { 0, 0, 0, 2 },  y_step_size = 4;
1007         const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4;
1008         unsigned char y[2], u, v;       /* YUV components */
1009         int y_, u_, v_, vb, uvg, ur;
1010         int r_, g_, b_;                 /* RGB components */
1011         unsigned char g;
1012         int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
1013         int clipmask_add, stretch_bytes;
1014
1015         frame  = usbvision->curFrame;
1016         f_even = frame->data + (frame->v4l2_linesize * frame->curline);
1017         f_odd  = f_even + frame->v4l2_linesize * usbvision->stretch_height;
1018
1019         /* Make sure there's enough data for the entire line */
1020         /* In this mode usbvision transfer 3 bytes for every 2 pixels */
1021         /* I need two lines to decode the color */
1022         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
1023         stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
1024         clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
1025         clipmask_odd_index  = clipmask_even_index + MAX_FRAME_WIDTH;
1026         clipmask_add = usbvision->stretch_width;
1027         pixel_per_line = frame->isocHeader.frameWidth;
1028
1029         if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
1030                 //printk(KERN_DEBUG "out of data, need %d\n", len);
1031                 return ParseState_Out;
1032         }
1033
1034         if ((frame->curline + 1) >= frame->frmheight) {
1035                 return ParseState_NextFrame;
1036         }
1037
1038         block_split = (pixel_per_line%y_block_size) ? 1 : 0;    //are some blocks splitted into different lines?
1039
1040         y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
1041                         + block_split * uv_block_size;
1042
1043         scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
1044         scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
1045         scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
1046                         + (4 - block_split) * sub_block_size);
1047
1048         for (block = 0; block < (pixel_per_line / sub_block_size);
1049              block++) {
1050
1051
1052                 for (pixel = 0; pixel < sub_block_size; pixel +=2) {
1053                         scratch_get(usbvision, &y[0], 2);
1054                         scratch_get_extra(usbvision, &u, &u_ptr, 1);
1055                         scratch_get_extra(usbvision, &v, &v_ptr, 1);
1056
1057                         //I don't use the YUV_TO_RGB macro for better performance
1058                         v_ = v - 128;
1059                         u_ = u - 128;
1060                         vb =              132252 * v_;
1061                         uvg= -53281 * u_ - 25625 * v_;
1062                         ur = 104595 * u_;
1063
1064                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1065                                 *f_even++ = y[0];
1066                                 *f_even++ = v;
1067                         }
1068                         else {
1069                                 y_ = 76284 * (y[0] - 16);
1070
1071                                 b_ = (y_ + vb) >> 16;
1072                                 g_ = (y_ + uvg)>> 16;
1073                                 r_ = (y_ + ur) >> 16;
1074
1075                                 switch (frame->v4l2_format.format) {
1076                                         case V4L2_PIX_FMT_RGB565:
1077                                                 g = LIMIT_RGB(g_);
1078                                                 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1079                                                 *f_even++ = (0x07 & (          g   >> 5)) | (0xF8 & LIMIT_RGB(r_));
1080                                                 break;
1081                                         case V4L2_PIX_FMT_RGB24:
1082                                                 *f_even++ = LIMIT_RGB(b_);
1083                                                 *f_even++ = LIMIT_RGB(g_);
1084                                                 *f_even++ = LIMIT_RGB(r_);
1085                                                 break;
1086                                         case V4L2_PIX_FMT_RGB32:
1087                                                 *f_even++ = LIMIT_RGB(b_);
1088                                                 *f_even++ = LIMIT_RGB(g_);
1089                                                 *f_even++ = LIMIT_RGB(r_);
1090                                                 f_even++;
1091                                                 break;
1092                                         case V4L2_PIX_FMT_RGB555:
1093                                                 g = LIMIT_RGB(g_);
1094                                                 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1095                                                 *f_even++ = (0x03 & (          g   >> 6)) |
1096                                                             (0x7C & (LIMIT_RGB(r_) >> 1));
1097                                                 break;
1098                                 }
1099                         }
1100                         clipmask_even_index += clipmask_add;
1101                         f_even += stretch_bytes;
1102
1103                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1104                                 *f_even++ = y[1];
1105                                 *f_even++ = u;
1106                         }
1107                         else {
1108                                 y_ = 76284 * (y[1] - 16);
1109
1110                                 b_ = (y_ + vb) >> 16;
1111                                 g_ = (y_ + uvg)>> 16;
1112                                 r_ = (y_ + ur) >> 16;
1113
1114                                 switch (frame->v4l2_format.format) {
1115                                         case V4L2_PIX_FMT_RGB565:
1116                                                 g = LIMIT_RGB(g_);
1117                                                 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1118                                                 *f_even++ = (0x07 & (          g   >> 5)) | (0xF8 & LIMIT_RGB(r_));
1119                                                 break;
1120                                         case V4L2_PIX_FMT_RGB24:
1121                                                 *f_even++ = LIMIT_RGB(b_);
1122                                                 *f_even++ = LIMIT_RGB(g_);
1123                                                 *f_even++ = LIMIT_RGB(r_);
1124                                                 break;
1125                                         case V4L2_PIX_FMT_RGB32:
1126                                                 *f_even++ = LIMIT_RGB(b_);
1127                                                 *f_even++ = LIMIT_RGB(g_);
1128                                                 *f_even++ = LIMIT_RGB(r_);
1129                                                 f_even++;
1130                                                 break;
1131                                         case V4L2_PIX_FMT_RGB555:
1132                                                 g = LIMIT_RGB(g_);
1133                                                 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1134                                                 *f_even++ = (0x03 & (          g   >> 6)) |
1135                                                             (0x7C & (LIMIT_RGB(r_) >> 1));
1136                                                 break;
1137                                 }
1138                         }
1139                         clipmask_even_index += clipmask_add;
1140                         f_even += stretch_bytes;
1141
1142                         scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1143
1144                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1145                                 *f_odd++ = y[0];
1146                                 *f_odd++ = v;
1147                         }
1148                         else {
1149                                 y_ = 76284 * (y[0] - 16);
1150
1151                                 b_ = (y_ + vb) >> 16;
1152                                 g_ = (y_ + uvg)>> 16;
1153                                 r_ = (y_ + ur) >> 16;
1154
1155                                 switch (frame->v4l2_format.format) {
1156                                         case V4L2_PIX_FMT_RGB565:
1157                                                 g = LIMIT_RGB(g_);
1158                                                 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1159                                                 *f_odd++ = (0x07 & (          g   >> 5)) | (0xF8 & LIMIT_RGB(r_));
1160                                                 break;
1161                                         case V4L2_PIX_FMT_RGB24:
1162                                                 *f_odd++ = LIMIT_RGB(b_);
1163                                                 *f_odd++ = LIMIT_RGB(g_);
1164                                                 *f_odd++ = LIMIT_RGB(r_);
1165                                                 break;
1166                                         case V4L2_PIX_FMT_RGB32:
1167                                                 *f_odd++ = LIMIT_RGB(b_);
1168                                                 *f_odd++ = LIMIT_RGB(g_);
1169                                                 *f_odd++ = LIMIT_RGB(r_);
1170                                                 f_odd++;
1171                                                 break;
1172                                         case V4L2_PIX_FMT_RGB555:
1173                                                 g = LIMIT_RGB(g_);
1174                                                 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1175                                                 *f_odd++ = (0x03 & (          g   >> 6)) |
1176                                                            (0x7C & (LIMIT_RGB(r_) >> 1));
1177                                                 break;
1178                                 }
1179                         }
1180                         clipmask_odd_index += clipmask_add;
1181                         f_odd += stretch_bytes;
1182
1183                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1184                                 *f_odd++ = y[1];
1185                                 *f_odd++ = u;
1186                         }
1187                         else {
1188                                 y_ = 76284 * (y[1] - 16);
1189
1190                                 b_ = (y_ + vb) >> 16;
1191                                 g_ = (y_ + uvg)>> 16;
1192                                 r_ = (y_ + ur) >> 16;
1193
1194                                 switch (frame->v4l2_format.format) {
1195                                         case V4L2_PIX_FMT_RGB565:
1196                                                 g = LIMIT_RGB(g_);
1197                                                 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1198                                                 *f_odd++ = (0x07 & (          g   >> 5)) | (0xF8 & LIMIT_RGB(r_));
1199                                                 break;
1200                                         case V4L2_PIX_FMT_RGB24:
1201                                                 *f_odd++ = LIMIT_RGB(b_);
1202                                                 *f_odd++ = LIMIT_RGB(g_);
1203                                                 *f_odd++ = LIMIT_RGB(r_);
1204                                                 break;
1205                                         case V4L2_PIX_FMT_RGB32:
1206                                                 *f_odd++ = LIMIT_RGB(b_);
1207                                                 *f_odd++ = LIMIT_RGB(g_);
1208                                                 *f_odd++ = LIMIT_RGB(r_);
1209                                                 f_odd++;
1210                                                 break;
1211                                         case V4L2_PIX_FMT_RGB555:
1212                                                 g = LIMIT_RGB(g_);
1213                                                 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1214                                                 *f_odd++ = (0x03 & (          g   >> 6)) |
1215                                                            (0x7C & (LIMIT_RGB(r_) >> 1));
1216                                                 break;
1217                                 }
1218                         }
1219                         clipmask_odd_index += clipmask_add;
1220                         f_odd += stretch_bytes;
1221                 }
1222
1223                 scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size);
1224                 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1225                                 * sub_block_size);
1226                 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1227                                 * sub_block_size);
1228                 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1229                                 * sub_block_size);
1230         }
1231
1232         scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1233                         + block_split * sub_block_size);
1234
1235         frame->curline += 2 * usbvision->stretch_height;
1236         *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1237
1238         if (frame->curline >= frame->frmheight)
1239                 return ParseState_NextFrame;
1240         else
1241                 return ParseState_Continue;
1242 }
1243
1244 /*
1245  * usbvision_parse_data()
1246  *
1247  * Generic routine to parse the scratch buffer. It employs either
1248  * usbvision_find_header() or usbvision_parse_lines() to do most
1249  * of work.
1250  *
1251  */
1252 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1253 {
1254         struct usbvision_frame *frame;
1255         enum ParseState newstate;
1256         long copylen = 0;
1257         unsigned long lock_flags;
1258
1259         frame = usbvision->curFrame;
1260
1261         PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1262
1263         while (1) {
1264
1265                 newstate = ParseState_Out;
1266                 if (scratch_len(usbvision)) {
1267                         if (frame->scanstate == ScanState_Scanning) {
1268                                 newstate = usbvision_find_header(usbvision);
1269                         }
1270                         else if (frame->scanstate == ScanState_Lines) {
1271                                 if (usbvision->isocMode == ISOC_MODE_YUV420) {
1272                                         newstate = usbvision_parse_lines_420(usbvision, &copylen);
1273                                 }
1274                                 else if (usbvision->isocMode == ISOC_MODE_YUV422) {
1275                                         newstate = usbvision_parse_lines_422(usbvision, &copylen);
1276                                 }
1277                                 else if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
1278                                         newstate = usbvision_parse_compress(usbvision, &copylen);
1279                                 }
1280
1281                         }
1282                 }
1283                 if (newstate == ParseState_Continue) {
1284                         continue;
1285                 }
1286                 else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) {
1287                         break;
1288                 }
1289                 else {
1290                         return; /* ParseState_EndParse */
1291                 }
1292         }
1293
1294         if (newstate == ParseState_NextFrame) {
1295                 frame->grabstate = FrameState_Done;
1296                 do_gettimeofday(&(frame->timestamp));
1297                 frame->sequence = usbvision->frame_num;
1298
1299                 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1300                 list_move_tail(&(frame->frame), &usbvision->outqueue);
1301                 usbvision->curFrame = NULL;
1302                 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1303
1304                 usbvision->frame_num++;
1305
1306                 /* This will cause the process to request another frame. */
1307                 if (waitqueue_active(&usbvision->wait_frame)) {
1308                         PDEBUG(DBG_PARSE, "Wake up !");
1309                         wake_up_interruptible(&usbvision->wait_frame);
1310                 }
1311         }
1312         else
1313                 frame->grabstate = FrameState_Grabbing;
1314
1315
1316         /* Update the frame's uncompressed length. */
1317         frame->scanlength += copylen;
1318 }
1319
1320
1321 /*
1322  * Make all of the blocks of data contiguous
1323  */
1324 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1325                                           struct urb *urb)
1326 {
1327         unsigned char *packet_data;
1328         int i, totlen = 0;
1329
1330         for (i = 0; i < urb->number_of_packets; i++) {
1331                 int packet_len = urb->iso_frame_desc[i].actual_length;
1332                 int packet_stat = urb->iso_frame_desc[i].status;
1333
1334                 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1335
1336                 /* Detect and ignore errored packets */
1337                 if (packet_stat) {      // packet_stat != 0 ?????????????
1338                         PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1339                         usbvision->isocErrCount++;
1340                         continue;
1341                 }
1342
1343                 /* Detect and ignore empty packets */
1344                 if (packet_len < 0) {
1345                         PDEBUG(DBG_ISOC, "error packet [%d]", i);
1346                         usbvision->isocSkipCount++;
1347                         continue;
1348                 }
1349                 else if (packet_len == 0) {     /* Frame end ????? */
1350                         PDEBUG(DBG_ISOC, "null packet [%d]", i);
1351                         usbvision->isocstate=IsocState_NoFrame;
1352                         usbvision->isocSkipCount++;
1353                         continue;
1354                 }
1355                 else if (packet_len > usbvision->isocPacketSize) {
1356                         PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i);
1357                         usbvision->isocSkipCount++;
1358                         continue;
1359                 }
1360
1361                 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1362
1363                 if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins
1364                         usbvision->isocstate=IsocState_InFrame;
1365                         scratch_mark_header(usbvision);
1366                         usbvision_measure_bandwidth(usbvision);
1367                         PDEBUG(DBG_ISOC, "packet with header");
1368                 }
1369
1370                 /*
1371                  * If usbvision continues to feed us with data but there is no
1372                  * consumption (if, for example, V4L client fell asleep) we
1373                  * may overflow the buffer. We have to move old data over to
1374                  * free room for new data. This is bad for old data. If we
1375                  * just drop new data then it's bad for new data... choose
1376                  * your favorite evil here.
1377                  */
1378                 if (scratch_free(usbvision) < packet_len) {
1379
1380                         usbvision->scratch_ovf_count++;
1381                         PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1382                                scratch_len(usbvision), packet_len);
1383                         scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1384                 }
1385
1386                 /* Now we know that there is enough room in scratch buffer */
1387                 scratch_put(usbvision, packet_data, packet_len);
1388                 totlen += packet_len;
1389                 usbvision->isocDataCount += packet_len;
1390                 usbvision->isocPacketCount++;
1391         }
1392 #if ENABLE_HEXDUMP
1393         if (totlen > 0) {
1394                 static int foo = 0;
1395                 if (foo < 1) {
1396                         printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1397                         usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1398                         ++foo;
1399                 }
1400         }
1401 #endif
1402  return totlen;
1403 }
1404
1405 static void usbvision_isocIrq(struct urb *urb)
1406 {
1407         int errCode = 0;
1408         int len;
1409         struct usb_usbvision *usbvision = urb->context;
1410         int i;
1411         unsigned long startTime = jiffies;
1412         struct usbvision_frame **f;
1413
1414         /* We don't want to do anything if we are about to be removed! */
1415         if (!USBVISION_IS_OPERATIONAL(usbvision))
1416                 return;
1417
1418         f = &usbvision->curFrame;
1419
1420         /* Manage streaming interruption */
1421         if (usbvision->streaming == Stream_Interrupt) {
1422                 usbvision->streaming = Stream_Idle;
1423                 if ((*f)) {
1424                         (*f)->grabstate = FrameState_Ready;
1425                         (*f)->scanstate = ScanState_Scanning;
1426                 }
1427                 PDEBUG(DBG_IRQ, "stream interrupted");
1428                 wake_up_interruptible(&usbvision->wait_stream);
1429         }
1430
1431         /* Copy the data received into our scratch buffer */
1432         len = usbvision_compress_isochronous(usbvision, urb);
1433
1434         usbvision->isocUrbCount++;
1435         usbvision->urb_length = len;
1436
1437         if (usbvision->streaming == Stream_On) {
1438
1439                 /* If we collected enough data let's parse! */
1440                 if (scratch_len(usbvision) > USBVISION_HEADER_LENGTH) { /* 12 == header_length */
1441                         /*If we don't have a frame we're current working on, complain */
1442                         if(!list_empty(&(usbvision->inqueue))) {
1443                                 if (!(*f)) {
1444                                         (*f) = list_entry(usbvision->inqueue.next,struct usbvision_frame, frame);
1445                                 }
1446                                 usbvision_parse_data(usbvision);
1447                         }
1448                         else {
1449                                 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1450                                 scratch_reset(usbvision);
1451                         }
1452                 }
1453         }
1454         else {
1455                 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1456                 scratch_reset(usbvision);
1457         }
1458
1459         usbvision->timeInIrq += jiffies - startTime;
1460
1461         for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1462                 urb->iso_frame_desc[i].status = 0;
1463                 urb->iso_frame_desc[i].actual_length = 0;
1464         }
1465
1466         urb->status = 0;
1467         urb->dev = usbvision->dev;
1468         errCode = usb_submit_urb (urb, GFP_ATOMIC);
1469
1470         /* Disable this warning.  By design of the driver. */
1471         //      if(errCode) {
1472         //              err("%s: usb_submit_urb failed: error %d", __FUNCTION__, errCode);
1473         //      }
1474
1475         return;
1476 }
1477
1478 /*************************************/
1479 /* Low level usbvision access functions */
1480 /*************************************/
1481
1482 /*
1483  * usbvision_read_reg()
1484  *
1485  * return  < 0 -> Error
1486  *        >= 0 -> Data
1487  */
1488
1489 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1490 {
1491         int errCode = 0;
1492         unsigned char buffer[1];
1493
1494         if (!USBVISION_IS_OPERATIONAL(usbvision))
1495                 return -1;
1496
1497         errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1498                                 USBVISION_OP_CODE,
1499                                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1500                                 0, (__u16) reg, buffer, 1, HZ);
1501
1502         if (errCode < 0) {
1503                 err("%s: failed: error %d", __FUNCTION__, errCode);
1504                 return errCode;
1505         }
1506         return buffer[0];
1507 }
1508
1509 /*
1510  * usbvision_write_reg()
1511  *
1512  * return 1 -> Reg written
1513  *        0 -> usbvision is not yet ready
1514  *       -1 -> Something went wrong
1515  */
1516
1517 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1518                             unsigned char value)
1519 {
1520         int errCode = 0;
1521
1522         if (!USBVISION_IS_OPERATIONAL(usbvision))
1523                 return 0;
1524
1525         errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1526                                 USBVISION_OP_CODE,
1527                                 USB_DIR_OUT | USB_TYPE_VENDOR |
1528                                 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
1529
1530         if (errCode < 0) {
1531                 err("%s: failed: error %d", __FUNCTION__, errCode);
1532         }
1533         return errCode;
1534 }
1535
1536
1537 static void usbvision_ctrlUrb_complete(struct urb *urb)
1538 {
1539         struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1540
1541         PDEBUG(DBG_IRQ, "");
1542         usbvision->ctrlUrbBusy = 0;
1543         if (waitqueue_active(&usbvision->ctrlUrb_wq)) {
1544                 wake_up_interruptible(&usbvision->ctrlUrb_wq);
1545         }
1546 }
1547
1548
1549 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address,
1550                                                                         unsigned char *data, int len)
1551 {
1552         int errCode = 0;
1553
1554         PDEBUG(DBG_IRQ, "");
1555         if (len > 8) {
1556                 return -EFAULT;
1557         }
1558 //      down(&usbvision->ctrlUrbLock);
1559         if (usbvision->ctrlUrbBusy) {
1560 //              up(&usbvision->ctrlUrbLock);
1561                 return -EBUSY;
1562         }
1563         usbvision->ctrlUrbBusy = 1;
1564 //      up(&usbvision->ctrlUrbLock);
1565
1566         usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1567         usbvision->ctrlUrbSetup.bRequest     = USBVISION_OP_CODE;
1568         usbvision->ctrlUrbSetup.wValue       = 0;
1569         usbvision->ctrlUrbSetup.wIndex       = cpu_to_le16(address);
1570         usbvision->ctrlUrbSetup.wLength      = cpu_to_le16(len);
1571         usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev,
1572                                                         usb_sndctrlpipe(usbvision->dev, 1),
1573                                                         (unsigned char *)&usbvision->ctrlUrbSetup,
1574                                                         (void *)usbvision->ctrlUrbBuffer, len,
1575                                                         usbvision_ctrlUrb_complete,
1576                                                         (void *)usbvision);
1577
1578         memcpy(usbvision->ctrlUrbBuffer, data, len);
1579
1580         errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC);
1581         if (errCode < 0) {
1582                 // error in usb_submit_urb()
1583                 usbvision->ctrlUrbBusy = 0;
1584         }
1585         PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode);
1586         return errCode;
1587 }
1588
1589
1590 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1591 {
1592         int errCode = 0;
1593
1594         usbvision->lastIsocFrameNum = -1;
1595         usbvision->isocDataCount = 0;
1596         usbvision->isocPacketCount = 0;
1597         usbvision->isocSkipCount = 0;
1598         usbvision->comprLevel = 50;
1599         usbvision->lastComprLevel = -1;
1600         usbvision->isocUrbCount = 0;
1601         usbvision->requestIntra = 1;
1602         usbvision->isocMeasureBandwidthCount = 0;
1603
1604         return errCode;
1605 }
1606
1607 /* this function measures the used bandwidth since last call
1608  * return:    0 : no error
1609  * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize
1610  */
1611 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision)
1612 {
1613         int errCode = 0;
1614
1615         if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames
1616                 usbvision->isocMeasureBandwidthCount++;
1617                 return errCode;
1618         }
1619         if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) {
1620                 usbvision->usedBandwidth = usbvision->isocDataCount /
1621                                         (usbvision->isocPacketCount + usbvision->isocSkipCount) *
1622                                         100 / usbvision->isocPacketSize;
1623         }
1624         usbvision->isocMeasureBandwidthCount = 0;
1625         usbvision->isocDataCount = 0;
1626         usbvision->isocPacketCount = 0;
1627         usbvision->isocSkipCount = 0;
1628         return errCode;
1629 }
1630
1631 static int usbvision_adjust_compression (struct usb_usbvision *usbvision)
1632 {
1633         int errCode = 0;
1634         unsigned char buffer[6];
1635
1636         PDEBUG(DBG_IRQ, "");
1637         if ((adjustCompression) && (usbvision->usedBandwidth > 0)) {
1638                 usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2;
1639                 RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100);
1640                 if (usbvision->comprLevel != usbvision->lastComprLevel) {
1641                         int distorsion;
1642                         if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) {
1643                                 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100);      // PCM Threshold 1
1644                                 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100);       // PCM Threshold 2
1645                                 distorsion = 7 + 248 * usbvision->comprLevel / 100;
1646                                 buffer[2] = (unsigned char)(distorsion & 0xFF);                         // Average distorsion Threshold (inter)
1647                                 buffer[3] = (unsigned char)(distorsion & 0xFF);                         // Average distorsion Threshold (intra)
1648                                 distorsion = 1 + 42 * usbvision->comprLevel / 100;
1649                                 buffer[4] = (unsigned char)(distorsion & 0xFF);                         // Maximum distorsion Threshold (inter)
1650                                 buffer[5] = (unsigned char)(distorsion & 0xFF);                         // Maximum distorsion Threshold (intra)
1651                         }
1652                         else { //BRIDGE_NT1003
1653                                 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100);      // PCM threshold 1
1654                                 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100);       // PCM threshold 2
1655                                 distorsion = 2 + 253 * usbvision->comprLevel / 100;
1656                                 buffer[2] = (unsigned char)(distorsion & 0xFF);                         // distorsion threshold bit0-7
1657                                 buffer[3] = 0;  //(unsigned char)((distorsion >> 8) & 0x0F);            // distorsion threshold bit 8-11
1658                                 distorsion = 0 + 43 * usbvision->comprLevel / 100;
1659                                 buffer[4] = (unsigned char)(distorsion & 0xFF);                         // maximum distorsion bit0-7
1660                                 buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01);             // maximum distorsion bit 8
1661                         }
1662                         errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1663                         if (errCode == 0){
1664                                 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1665                                                                 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1666                                 usbvision->lastComprLevel = usbvision->comprLevel;
1667                         }
1668                 }
1669         }
1670         return errCode;
1671 }
1672
1673 static int usbvision_request_intra (struct usb_usbvision *usbvision)
1674 {
1675         int errCode = 0;
1676         unsigned char buffer[1];
1677
1678         PDEBUG(DBG_IRQ, "");
1679         usbvision->requestIntra = 1;
1680         buffer[0] = 1;
1681         usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1682         return errCode;
1683 }
1684
1685 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision)
1686 {
1687         int errCode = 0;
1688         unsigned char buffer[1];
1689
1690         PDEBUG(DBG_IRQ, "");
1691         usbvision->requestIntra = 0;
1692         buffer[0] = 0;
1693         usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1694         return errCode;
1695 }
1696
1697 /*******************************
1698  * usbvision utility functions
1699  *******************************/
1700
1701 int usbvision_power_off(struct usb_usbvision *usbvision)
1702 {
1703         int errCode = 0;
1704
1705         PDEBUG(DBG_FUNC, "");
1706
1707         errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1708         if (errCode == 1) {
1709                 usbvision->power = 0;
1710         }
1711         PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode);
1712         return errCode;
1713 }
1714
1715 /*
1716  * usbvision_set_video_format()
1717  *
1718  */
1719 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1720 {
1721         static const char proc[] = "usbvision_set_video_format";
1722         int rc;
1723         unsigned char value[2];
1724
1725         if (!USBVISION_IS_OPERATIONAL(usbvision))
1726                 return 0;
1727
1728         PDEBUG(DBG_FUNC, "isocMode %#02x", format);
1729
1730         if ((format != ISOC_MODE_YUV422)
1731             && (format != ISOC_MODE_YUV420)
1732             && (format != ISOC_MODE_COMPRESS)) {
1733                 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1734                        format);
1735                 format = ISOC_MODE_YUV420;
1736         }
1737         value[0] = 0x0A;  //TODO: See the effect of the filter
1738         value[1] = format;
1739         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1740                              USBVISION_OP_CODE,
1741                              USB_DIR_OUT | USB_TYPE_VENDOR |
1742                              USB_RECIP_ENDPOINT, 0,
1743                              (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1744
1745         if (rc < 0) {
1746                 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1747                        "reconnect or reload driver.\n", proc, rc);
1748         }
1749         usbvision->isocMode = format;
1750         return rc;
1751 }
1752
1753 /*
1754  * usbvision_set_output()
1755  *
1756  */
1757
1758 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1759                          int height)
1760 {
1761         int errCode = 0;
1762         int UsbWidth, UsbHeight;
1763         unsigned int frameRate=0, frameDrop=0;
1764         unsigned char value[4];
1765
1766         if (!USBVISION_IS_OPERATIONAL(usbvision)) {
1767                 return 0;
1768         }
1769
1770         if (width > MAX_USB_WIDTH) {
1771                 UsbWidth = width / 2;
1772                 usbvision->stretch_width = 2;
1773         }
1774         else {
1775                 UsbWidth = width;
1776                 usbvision->stretch_width = 1;
1777         }
1778
1779         if (height > MAX_USB_HEIGHT) {
1780                 UsbHeight = height / 2;
1781                 usbvision->stretch_height = 2;
1782         }
1783         else {
1784                 UsbHeight = height;
1785                 usbvision->stretch_height = 1;
1786         }
1787
1788         RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1789         UsbWidth &= ~(MIN_FRAME_WIDTH-1);
1790         RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1791         UsbHeight &= ~(1);
1792
1793         PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1794                                                 UsbWidth, UsbHeight, width, height,
1795                                                 usbvision->stretch_width, usbvision->stretch_height);
1796
1797         /* I'll not rewrite the same values */
1798         if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) {
1799                 value[0] = UsbWidth & 0xff;             //LSB
1800                 value[1] = (UsbWidth >> 8) & 0x03;      //MSB
1801                 value[2] = UsbHeight & 0xff;            //LSB
1802                 value[3] = (UsbHeight >> 8) & 0x03;     //MSB
1803
1804                 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1805                              USBVISION_OP_CODE,
1806                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1807                                  0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1808
1809                 if (errCode < 0) {
1810                         err("%s failed: error %d", __FUNCTION__, errCode);
1811                         return errCode;
1812                 }
1813                 usbvision->curwidth = usbvision->stretch_width * UsbWidth;
1814                 usbvision->curheight = usbvision->stretch_height * UsbHeight;
1815         }
1816
1817         if (usbvision->isocMode == ISOC_MODE_YUV422) {
1818                 frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2);
1819         }
1820         else if (usbvision->isocMode == ISOC_MODE_YUV420) {
1821                 frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8);
1822         }
1823         else {
1824                 frameRate = FRAMERATE_MAX;
1825         }
1826
1827         if (usbvision->tvnorm->id & V4L2_STD_625_50) {
1828                 frameDrop = frameRate * 32 / 25 - 1;
1829         }
1830         else if (usbvision->tvnorm->id & V4L2_STD_525_60) {
1831                 frameDrop = frameRate * 32 / 30 - 1;
1832         }
1833
1834         RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX);
1835
1836         PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop);
1837
1838         frameDrop = FRAMERATE_MAX;      // We can allow the maximum here, because dropping is controlled
1839
1840         /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1841                 => frameSkip = 4;
1842                 => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1843
1844            frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1845             => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1846                 => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1847         */
1848         errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop);
1849         return errCode;
1850 }
1851
1852
1853 /*
1854  * usbvision_frames_alloc
1855  * allocate the required frames
1856  */
1857 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
1858 {
1859         int i;
1860
1861         /*needs to be page aligned cause the buffers can be mapped individually! */
1862         usbvision->max_frame_size =  PAGE_ALIGN(usbvision->curwidth *
1863                                                 usbvision->curheight *
1864                                                 usbvision->palette.bytes_per_pixel);
1865
1866         /* Try to do my best to allocate the frames the user want in the remaining memory */
1867         usbvision->num_frames = number_of_frames;
1868         while (usbvision->num_frames > 0) {
1869                 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
1870                 if((usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size))) {
1871                         break;
1872                 }
1873                 usbvision->num_frames--;
1874         }
1875
1876         spin_lock_init(&usbvision->queue_lock);
1877         init_waitqueue_head(&usbvision->wait_frame);
1878         init_waitqueue_head(&usbvision->wait_stream);
1879
1880         /* Allocate all buffers */
1881         for (i = 0; i < usbvision->num_frames; i++) {
1882                 usbvision->frame[i].index = i;
1883                 usbvision->frame[i].grabstate = FrameState_Unused;
1884                 usbvision->frame[i].data = usbvision->fbuf +
1885                         i * usbvision->max_frame_size;
1886                 /*
1887                  * Set default sizes for read operation.
1888                  */
1889                 usbvision->stretch_width = 1;
1890                 usbvision->stretch_height = 1;
1891                 usbvision->frame[i].width = usbvision->curwidth;
1892                 usbvision->frame[i].height = usbvision->curheight;
1893                 usbvision->frame[i].bytes_read = 0;
1894         }
1895         PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",usbvision->num_frames,usbvision->max_frame_size);
1896         return usbvision->num_frames;
1897 }
1898
1899 /*
1900  * usbvision_frames_free
1901  * frees memory allocated for the frames
1902  */
1903 void usbvision_frames_free(struct usb_usbvision *usbvision)
1904 {
1905         /* Have to free all that memory */
1906         PDEBUG(DBG_FUNC, "free %d frames",usbvision->num_frames);
1907
1908         if (usbvision->fbuf != NULL) {
1909                 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1910                 usbvision->fbuf = NULL;
1911
1912                 usbvision->num_frames = 0;
1913         }
1914 }
1915 /*
1916  * usbvision_empty_framequeues()
1917  * prepare queues for incoming and outgoing frames
1918  */
1919 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1920 {
1921         u32 i;
1922
1923         INIT_LIST_HEAD(&(usbvision->inqueue));
1924         INIT_LIST_HEAD(&(usbvision->outqueue));
1925
1926         for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1927                 usbvision->frame[i].grabstate = FrameState_Unused;
1928                 usbvision->frame[i].bytes_read = 0;
1929         }
1930 }
1931
1932 /*
1933  * usbvision_stream_interrupt()
1934  * stops streaming
1935  */
1936 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1937 {
1938         int ret = 0;
1939
1940         /* stop reading from the device */
1941
1942         usbvision->streaming = Stream_Interrupt;
1943         ret = wait_event_timeout(usbvision->wait_stream,
1944                                  (usbvision->streaming == Stream_Idle),
1945                                  msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1946         return ret;
1947 }
1948
1949 /*
1950  * usbvision_set_compress_params()
1951  *
1952  */
1953
1954 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
1955 {
1956         static const char proc[] = "usbvision_set_compresion_params: ";
1957         int rc;
1958         unsigned char value[6];
1959
1960         value[0] = 0x0F;    // Intra-Compression cycle
1961         value[1] = 0x01;    // Reg.45 one line per strip
1962         value[2] = 0x00;    // Reg.46 Force intra mode on all new frames
1963         value[3] = 0x00;    // Reg.47 FORCE_UP <- 0 normal operation (not force)
1964         value[4] = 0xA2;    // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode.
1965         value[5] = 0x00;    // Reg.49 DVI_YUV This has nothing to do with compression
1966
1967         //catched values for NT1004
1968         // value[0] = 0xFF; // Never apply intra mode automatically
1969         // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip
1970         // value[2] = 0x01; // Force intra mode on all new frames
1971         // value[3] = 0x00; // Strip size 400 Bytes; do not force up
1972         // value[4] = 0xA2; //
1973         if (!USBVISION_IS_OPERATIONAL(usbvision))
1974                 return 0;
1975
1976         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1977                              USBVISION_OP_CODE,
1978                              USB_DIR_OUT | USB_TYPE_VENDOR |
1979                              USB_RECIP_ENDPOINT, 0,
1980                              (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
1981
1982         if (rc < 0) {
1983                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
1984                        "reconnect or reload driver.\n", proc, rc);
1985                 return rc;
1986         }
1987
1988         if (usbvision->bridgeType == BRIDGE_NT1004) {
1989                 value[0] =  20; // PCM Threshold 1
1990                 value[1] =  12; // PCM Threshold 2
1991                 value[2] = 255; // Distorsion Threshold inter
1992                 value[3] = 255; // Distorsion Threshold intra
1993                 value[4] =  43; // Max Distorsion inter
1994                 value[5] =  43; // Max Distorsion intra
1995         }
1996         else {
1997                 value[0] =  20; // PCM Threshold 1
1998                 value[1] =  12; // PCM Threshold 2
1999                 value[2] = 255; // Distorsion Threshold d7-d0
2000                 value[3] =   0; // Distorsion Threshold d11-d8
2001                 value[4] =  43; // Max Distorsion d7-d0
2002                 value[5] =   0; // Max Distorsion d8
2003         }
2004
2005         if (!USBVISION_IS_OPERATIONAL(usbvision))
2006                 return 0;
2007
2008         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2009                              USBVISION_OP_CODE,
2010                              USB_DIR_OUT | USB_TYPE_VENDOR |
2011                              USB_RECIP_ENDPOINT, 0,
2012                              (__u16) USBVISION_PCM_THR1, value, 6, HZ);
2013
2014         if (rc < 0) {
2015                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2016                        "reconnect or reload driver.\n", proc, rc);
2017                 return rc;
2018         }
2019
2020
2021         return rc;
2022 }
2023
2024
2025 /*
2026  * usbvision_set_input()
2027  *
2028  * Set the input (saa711x, ...) size x y and other misc input params
2029  * I've no idea if this parameters are right
2030  *
2031  */
2032 int usbvision_set_input(struct usb_usbvision *usbvision)
2033 {
2034         static const char proc[] = "usbvision_set_input: ";
2035         int rc;
2036         unsigned char value[8];
2037         unsigned char dvi_yuv_value;
2038
2039         if (!USBVISION_IS_OPERATIONAL(usbvision))
2040                 return 0;
2041
2042         /* Set input format expected from decoder*/
2043         if (usbvision_device_data[usbvision->DevModel].Vin_Reg1_override) {
2044                 value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1;
2045         } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2046                 /* SAA7113 uses 8 bit output */
2047                 value[0] = USBVISION_8_422_SYNC;
2048         } else {
2049                 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
2050                  * as that is how saa7111 is configured */
2051                 value[0] = USBVISION_16_422_SYNC;
2052                 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
2053         }
2054
2055         rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
2056         if (rc < 0) {
2057                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2058                        "reconnect or reload driver.\n", proc, rc);
2059                 return rc;
2060         }
2061
2062
2063         if (usbvision->tvnorm->id & V4L2_STD_PAL) {
2064                 value[0] = 0xC0;
2065                 value[1] = 0x02;        //0x02C0 -> 704 Input video line length
2066                 value[2] = 0x20;
2067                 value[3] = 0x01;        //0x0120 -> 288 Input video n. of lines
2068                 value[4] = 0x60;
2069                 value[5] = 0x00;        //0x0060 -> 96 Input video h offset
2070                 value[6] = 0x16;
2071                 value[7] = 0x00;        //0x0016 -> 22 Input video v offset
2072         } else if (usbvision->tvnorm->id & V4L2_STD_SECAM) {
2073                 value[0] = 0xC0;
2074                 value[1] = 0x02;        //0x02C0 -> 704 Input video line length
2075                 value[2] = 0x20;
2076                 value[3] = 0x01;        //0x0120 -> 288 Input video n. of lines
2077                 value[4] = 0x01;
2078                 value[5] = 0x00;        //0x0001 -> 01 Input video h offset
2079                 value[6] = 0x01;
2080                 value[7] = 0x00;        //0x0001 -> 01 Input video v offset
2081         } else {        /* V4L2_STD_NTSC */
2082                 value[0] = 0xD0;
2083                 value[1] = 0x02;        //0x02D0 -> 720 Input video line length
2084                 value[2] = 0xF0;
2085                 value[3] = 0x00;        //0x00F0 -> 240 Input video number of lines
2086                 value[4] = 0x50;
2087                 value[5] = 0x00;        //0x0050 -> 80 Input video h offset
2088                 value[6] = 0x10;
2089                 value[7] = 0x00;        //0x0010 -> 16 Input video v offset
2090         }
2091
2092         if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) {
2093                 value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff;
2094                 value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8;
2095         }
2096
2097         if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) {
2098                 value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff;
2099                 value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8;
2100         }
2101
2102         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2103                              USBVISION_OP_CODE, /* USBVISION specific code */
2104                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2105                              (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2106         if (rc < 0) {
2107                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2108                        "reconnect or reload driver.\n", proc, rc);
2109                 return rc;
2110         }
2111
2112
2113         dvi_yuv_value = 0x00;   /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2114
2115         if(usbvision_device_data[usbvision->DevModel].Dvi_yuv_override){
2116                 dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv;
2117         }
2118         else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2119         /* This changes as the fine sync control changes. Further investigation necessary */
2120                 dvi_yuv_value = 0x06;
2121         }
2122
2123         return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value));
2124 }
2125
2126
2127 /*
2128  * usbvision_set_dram_settings()
2129  *
2130  * Set the buffer address needed by the usbvision dram to operate
2131  * This values has been taken with usbsnoop.
2132  *
2133  */
2134
2135 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2136 {
2137         int rc;
2138         unsigned char value[8];
2139
2140         if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2141                 value[0] = 0x42;
2142                 value[1] = 0x71;
2143                 value[2] = 0xff;
2144                 value[3] = 0x00;
2145                 value[4] = 0x98;
2146                 value[5] = 0xe0;
2147                 value[6] = 0x71;
2148                 value[7] = 0xff;
2149                 // UR:  0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte)
2150                 // FDL: 0x00000-0x0E099 =  57498 Words
2151                 // VDW: 0x0E3FF-0x3FFFF
2152         }
2153         else {
2154                 value[0] = 0x42;
2155                 value[1] = 0x00;
2156                 value[2] = 0xff;
2157                 value[3] = 0x00;
2158                 value[4] = 0x00;
2159                 value[5] = 0x00;
2160                 value[6] = 0x00;
2161                 value[7] = 0xff;
2162         }
2163         /* These are the values of the address of the video buffer,
2164          * they have to be loaded into the USBVISION_DRM_PRM1-8
2165          *
2166          * Start address of video output buffer for read:       drm_prm1-2 -> 0x00000
2167          * End address of video output buffer for read:         drm_prm1-3 -> 0x1ffff
2168          * Start address of video frame delay buffer:           drm_prm1-4 -> 0x20000
2169          *    Only used in compressed mode
2170          * End address of video frame delay buffer:             drm_prm1-5-6 -> 0x3ffff
2171          *    Only used in compressed mode
2172          * Start address of video output buffer for write:      drm_prm1-7 -> 0x00000
2173          * End address of video output buffer for write:        drm_prm1-8 -> 0x1ffff
2174          */
2175
2176         if (!USBVISION_IS_OPERATIONAL(usbvision))
2177                 return 0;
2178
2179         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2180                              USBVISION_OP_CODE, /* USBVISION specific code */
2181                              USB_DIR_OUT | USB_TYPE_VENDOR |
2182                              USB_RECIP_ENDPOINT, 0,
2183                              (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2184
2185         if (rc < 0) {
2186                 err("%sERROR=%d", __FUNCTION__, rc);
2187                 return rc;
2188         }
2189
2190         /* Restart the video buffer logic */
2191         if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2192                                    USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0)
2193                 return rc;
2194         rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2195
2196         return rc;
2197 }
2198
2199 /*
2200  * ()
2201  *
2202  * Power on the device, enables suspend-resume logic
2203  * &  reset the isoc End-Point
2204  *
2205  */
2206
2207 int usbvision_power_on(struct usb_usbvision *usbvision)
2208 {
2209         int errCode = 0;
2210
2211         PDEBUG(DBG_FUNC, "");
2212
2213         usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2214         usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2215                          USBVISION_SSPND_EN | USBVISION_RES2);
2216
2217         usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2218                          USBVISION_SSPND_EN | USBVISION_PWR_VID);
2219         errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2220                                                 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2221         if (errCode == 1) {
2222                 usbvision->power = 1;
2223         }
2224         PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode);
2225         return errCode;
2226 }
2227
2228
2229 /*
2230  * usbvision timer stuff
2231  */
2232
2233 // to call usbvision_power_off from task queue
2234 static void call_usbvision_power_off(struct work_struct *work)
2235 {
2236         struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork);
2237
2238         PDEBUG(DBG_FUNC, "");
2239         down_interruptible(&usbvision->lock);
2240         if(usbvision->user == 0) {
2241                 usbvision_i2c_unregister(usbvision);
2242
2243                 usbvision_power_off(usbvision);
2244                 usbvision->initialized = 0;
2245         }
2246         up(&usbvision->lock);
2247 }
2248
2249 static void usbvision_powerOffTimer(unsigned long data)
2250 {
2251         struct usb_usbvision *usbvision = (void *) data;
2252
2253         PDEBUG(DBG_FUNC, "");
2254         del_timer(&usbvision->powerOffTimer);
2255         INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off);
2256         (void) schedule_work(&usbvision->powerOffWork);
2257
2258 }
2259
2260 void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision)
2261 {
2262         init_timer(&usbvision->powerOffTimer);
2263         usbvision->powerOffTimer.data = (long) usbvision;
2264         usbvision->powerOffTimer.function = usbvision_powerOffTimer;
2265 }
2266
2267 void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision)
2268 {
2269         mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME);
2270 }
2271
2272 void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision)
2273 {
2274         if (timer_pending(&usbvision->powerOffTimer)) {
2275                 del_timer(&usbvision->powerOffTimer);
2276         }
2277 }
2278
2279 /*
2280  * usbvision_begin_streaming()
2281  * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2282  * idea about the rest
2283  */
2284 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2285 {
2286         int errCode = 0;
2287
2288         if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2289                 usbvision_init_compression(usbvision);
2290         }
2291         errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID |
2292                                                                                 usbvision->Vin_Reg2_Preset);
2293         return errCode;
2294 }
2295
2296 /*
2297  * usbvision_restart_isoc()
2298  * Not sure yet if touching here PWR_REG make loose the config
2299  */
2300
2301 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2302 {
2303         int ret;
2304
2305         if (
2306             (ret =
2307              usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2308                               USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0)
2309                 return ret;
2310         if (
2311             (ret =
2312              usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2313                               USBVISION_SSPND_EN | USBVISION_PWR_VID |
2314                               USBVISION_RES2)) < 0)
2315                 return ret;
2316         if (
2317             (ret =
2318              usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2319                               USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2320                                   usbvision->Vin_Reg2_Preset)) < 0) return ret;
2321
2322         /* TODO: schedule timeout */
2323         while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1);
2324
2325         return 0;
2326 }
2327
2328 int usbvision_audio_off(struct usb_usbvision *usbvision)
2329 {
2330         if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2331                 printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n");
2332                 return -1;
2333         }
2334         usbvision->AudioMute = 0;
2335         usbvision->AudioChannel = USBVISION_AUDIO_MUTE;
2336         return 0;
2337 }
2338
2339 int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel)
2340 {
2341         if (!usbvision->AudioMute) {
2342                 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) {
2343                         printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2344                         return -1;
2345                 }
2346         }
2347         usbvision->AudioChannel = AudioChannel;
2348         return 0;
2349 }
2350
2351 int usbvision_setup(struct usb_usbvision *usbvision,int format)
2352 {
2353         usbvision_set_video_format(usbvision, format);
2354         usbvision_set_dram_settings(usbvision);
2355         usbvision_set_compress_params(usbvision);
2356         usbvision_set_input(usbvision);
2357         usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2358         usbvision_restart_isoc(usbvision);
2359
2360         /* cosas del PCM */
2361         return USBVISION_IS_OPERATIONAL(usbvision);
2362 }
2363
2364 int usbvision_set_alternate(struct usb_usbvision *dev)
2365 {
2366         int errCode, prev_alt = dev->ifaceAlt;
2367         int i;
2368
2369         dev->ifaceAlt=0;
2370         for(i=0;i< dev->num_alt; i++)
2371                 if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->ifaceAlt])
2372                         dev->ifaceAlt=i;
2373
2374         if (dev->ifaceAlt != prev_alt) {
2375                 dev->isocPacketSize = dev->alt_max_pkt_size[dev->ifaceAlt];
2376                 PDEBUG(DBG_FUNC,"setting alternate %d with wMaxPacketSize=%u", dev->ifaceAlt,dev->isocPacketSize);
2377                 errCode = usb_set_interface(dev->dev, dev->iface, dev->ifaceAlt);
2378                 if (errCode < 0) {
2379                         err ("cannot change alternate number to %d (error=%i)",
2380                                                         dev->ifaceAlt, errCode);
2381                         return errCode;
2382                 }
2383         }
2384
2385         PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isocPacketSize);
2386
2387         return 0;
2388 }
2389
2390 /*
2391  * usbvision_init_isoc()
2392  *
2393  */
2394 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2395 {
2396         struct usb_device *dev = usbvision->dev;
2397         int bufIdx, errCode, regValue;
2398         const int sb_size = USBVISION_URB_FRAMES * USBVISION_MAX_ISOC_PACKET_SIZE;
2399
2400         if (!USBVISION_IS_OPERATIONAL(usbvision))
2401                 return -EFAULT;
2402
2403         usbvision->curFrame = NULL;
2404         scratch_reset(usbvision);
2405
2406         /* Alternate interface 1 is is the biggest frame size */
2407         errCode = usbvision_set_alternate(usbvision);
2408         if (errCode < 0) {
2409                 usbvision->last_error = errCode;
2410                 return -EBUSY;
2411         }
2412
2413         regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2414
2415         usbvision->usb_bandwidth = regValue >> 1;
2416         PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth);
2417
2418
2419
2420         /* We double buffer the Iso lists */
2421
2422         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2423                 int j, k;
2424                 struct urb *urb;
2425
2426                 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2427                 if (urb == NULL) {
2428                         err("%s: usb_alloc_urb() failed", __FUNCTION__);
2429                         return -ENOMEM;
2430                 }
2431                 usbvision->sbuf[bufIdx].urb = urb;
2432                 usbvision->sbuf[bufIdx].data = usb_buffer_alloc(usbvision->dev, sb_size, GFP_KERNEL,&urb->transfer_dma);
2433                 urb->dev = dev;
2434                 urb->context = usbvision;
2435                 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2436                 urb->transfer_flags = URB_ISO_ASAP;
2437                 urb->interval = 1;
2438                 urb->transfer_buffer = usbvision->sbuf[bufIdx].data;
2439                 urb->complete = usbvision_isocIrq;
2440                 urb->number_of_packets = USBVISION_URB_FRAMES;
2441                 urb->transfer_buffer_length =
2442                     usbvision->isocPacketSize * USBVISION_URB_FRAMES;
2443                 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2444                      k += usbvision->isocPacketSize) {
2445                         urb->iso_frame_desc[j].offset = k;
2446                         urb->iso_frame_desc[j].length = usbvision->isocPacketSize;
2447                 }
2448         }
2449
2450
2451         /* Submit all URBs */
2452         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2453                         errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb, GFP_KERNEL);
2454                 if (errCode) {
2455                         err("%s: usb_submit_urb(%d) failed: error %d", __FUNCTION__, bufIdx, errCode);
2456                 }
2457         }
2458
2459         usbvision->streaming = Stream_Idle;
2460         PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x", __FUNCTION__, usbvision->video_endp);
2461         return 0;
2462 }
2463
2464 /*
2465  * usbvision_stop_isoc()
2466  *
2467  * This procedure stops streaming and deallocates URBs. Then it
2468  * activates zero-bandwidth alt. setting of the video interface.
2469  *
2470  */
2471 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2472 {
2473         int bufIdx, errCode, regValue;
2474         const int sb_size = USBVISION_URB_FRAMES * USBVISION_MAX_ISOC_PACKET_SIZE;
2475
2476         if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL))
2477                 return;
2478
2479         /* Unschedule all of the iso td's */
2480         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2481                 usb_kill_urb(usbvision->sbuf[bufIdx].urb);
2482                 if (usbvision->sbuf[bufIdx].data){
2483                         usb_buffer_free(usbvision->dev,
2484                                         sb_size,
2485                                         usbvision->sbuf[bufIdx].data,
2486                                         usbvision->sbuf[bufIdx].urb->transfer_dma);
2487                 }
2488                 usb_free_urb(usbvision->sbuf[bufIdx].urb);
2489                 usbvision->sbuf[bufIdx].urb = NULL;
2490         }
2491
2492
2493         PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __FUNCTION__);
2494         usbvision->streaming = Stream_Off;
2495
2496         if (!usbvision->remove_pending) {
2497
2498                 /* Set packet size to 0 */
2499                 usbvision->ifaceAlt=0;
2500                 errCode = usb_set_interface(usbvision->dev, usbvision->iface,
2501                                             usbvision->ifaceAlt);
2502                 if (errCode < 0) {
2503                         err("%s: usb_set_interface() failed: error %d", __FUNCTION__, errCode);
2504                         usbvision->last_error = errCode;
2505                 }
2506                 regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2507                 usbvision->isocPacketSize = (regValue == 0) ? 0 : (regValue * 64) - 1;
2508                 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", usbvision->isocPacketSize);
2509
2510                 usbvision->usb_bandwidth = regValue >> 1;
2511                 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth);
2512         }
2513 }
2514
2515 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2516 {
2517         int mode[4];
2518         int audio[]= {1, 0, 0, 0};
2519         struct v4l2_routing route;
2520         //channel 0 is TV with audiochannel 1 (tuner mono)
2521         //channel 1 is Composite with audio channel 0 (line in)
2522         //channel 2 is S-Video with audio channel 0 (line in)
2523         //channel 3 is additional video inputs to the device with audio channel 0 (line in)
2524
2525         RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2526         usbvision->ctl_input = channel;
2527           route.input = SAA7115_COMPOSITE1;
2528           route.output = 0;
2529           call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
2530           call_i2c_clients(usbvision, VIDIOC_S_INPUT, &usbvision->ctl_input);
2531
2532         // set the new channel
2533         // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video
2534         // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red
2535
2536         switch (usbvision_device_data[usbvision->DevModel].Codec) {
2537                 case CODEC_SAA7113:
2538                         if (SwitchSVideoInput) { // To handle problems with S-Video Input for some devices.  Use SwitchSVideoInput parameter when loading the module.
2539                                 mode[2] = 1;
2540                         }
2541                         else {
2542                                 mode[2] = 7;
2543                         }
2544                         if (usbvision_device_data[usbvision->DevModel].VideoChannels == 4) {
2545                                 mode[0] = 0; mode[1] = 2; mode[3] = 3;  // Special for four input devices
2546                         }
2547                         else {
2548                                 mode[0] = 0; mode[1] = 2; //modes for regular saa7113 devices
2549                         }
2550                         break;
2551                 case CODEC_SAA7111:
2552                         mode[0] = 0; mode[1] = 1; mode[2] = 7; //modes for saa7111
2553                         break;
2554                 default:
2555                         mode[0] = 0; mode[1] = 1; mode[2] = 7; //default modes
2556         }
2557         route.input = mode[channel];
2558         call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
2559         usbvision->channel = channel;
2560         usbvision_set_audio(usbvision, audio[channel]);
2561         return 0;
2562 }
2563
2564 /*
2565  * Overrides for Emacs so that we follow Linus's tabbing style.
2566  * ---------------------------------------------------------------------------
2567  * Local variables:
2568  * c-basic-offset: 8
2569  * End:
2570  */