drivers/media/video/usbvision/usbvision-core.c

   1 /*
   2  * usbvision-core.c - driver for NT100x USB video capture devices
   3  *
   4  *
   5  * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
   6  *                         Dwaine Garden <dwainegarden@rogers.com>
   7  *
   8  * This module is part of usbvision driver project.
   9  * Updates to driver completed by Dwaine P. Garden
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/list.h>
  28 #include <linux/timer.h>
  29 #include <linux/slab.h>
  30 #include <linux/mm.h>
  31 #include <linux/utsname.h>
  32 #include <linux/highmem.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/module.h>
  35 #include <linux/init.h>
  36 #include <linux/spinlock.h>
  37 #include <asm/io.h>
  38 #include <linux/videodev2.h>
  39 #include <linux/video_decoder.h>
  40 #include <linux/i2c.h>
  41
  42 #include <media/saa7115.h>
  43 #include <media/v4l2-common.h>
  44 #include <media/tuner.h>
  45
  46 #include <linux/workqueue.h>
  47
  48 #include "usbvision.h"
  49
  50 static unsigned int core_debug;
  51 module_param(core_debug,int,0644);
  52 MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
  53
  54 static unsigned int force_testpattern;
  55 module_param(force_testpattern,int,0644);
  56 MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]");
  57
  58 static int adjustCompression = 1;       /* Set the compression to be adaptive */
  59 module_param(adjustCompression, int, 0444);
  60 MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device.  Default: 1 (On)");
  61
  62 /* To help people with Black and White output with using s-video input.
  63  * Some cables and input device are wired differently. */
  64 static int SwitchSVideoInput;
  65 module_param(SwitchSVideoInput, int, 0444);
  66 MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input.  Some cables and input device are wired differently. Default: 0 (Off)");
  67
  68 static unsigned int adjust_X_Offset = -1;
  69 module_param(adjust_X_Offset, int, 0644);
  70 MODULE_PARM_DESC(adjust_X_Offset, "adjust X offset display [core]");
  71
  72 static unsigned int adjust_Y_Offset = -1;
  73 module_param(adjust_Y_Offset, int, 0644);
  74 MODULE_PARM_DESC(adjust_Y_Offset, "adjust Y offset display [core]");
  75
  76
  77 #define ENABLE_HEXDUMP  0       /* Enable if you need it */
  78
  79
  80 #ifdef USBVISION_DEBUG
  81         #define PDEBUG(level, fmt, args...) { \
  82                 if (core_debug & (level)) \
  83                         printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \
  84                                 __func__, __LINE__ , ## args); \
  85         }
  86 #else
  87         #define PDEBUG(level, fmt, args...) do {} while(0)
  88 #endif
  89
  90 #define DBG_HEADER      1<<0
  91 #define DBG_IRQ         1<<1
  92 #define DBG_ISOC        1<<2
  93 #define DBG_PARSE       1<<3
  94 #define DBG_SCRATCH     1<<4
  95 #define DBG_FUNC        1<<5
  96
  97 static const int max_imgwidth = MAX_FRAME_WIDTH;
  98 static const int max_imgheight = MAX_FRAME_HEIGHT;
  99 static const int min_imgwidth = MIN_FRAME_WIDTH;
 100 static const int min_imgheight = MIN_FRAME_HEIGHT;
 101
 102 /* The value of 'scratch_buf_size' affects quality of the picture
 103  * in many ways. Shorter buffers may cause loss of data when client
 104  * is too slow. Larger buffers are memory-consuming and take longer
 105  * to work with. This setting can be adjusted, but the default value
 106  * should be OK for most desktop users.
 107  */
 108 #define DEFAULT_SCRATCH_BUF_SIZE        (0x20000)               // 128kB memory scratch buffer
 109 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
 110
 111 // Function prototypes
 112 static int usbvision_request_intra (struct usb_usbvision *usbvision);
 113 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision);
 114 static int usbvision_adjust_compression (struct usb_usbvision *usbvision);
 115 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision);
 116
 117 /*******************************/
 118 /* Memory management functions */
 119 /*******************************/
 120
 121 /*
 122  * Here we want the physical address of the memory.
 123  * This is used when initializing the contents of the area.
 124  */
 125
 126 static void *usbvision_rvmalloc(unsigned long size)
 127 {
 128         void *mem;
 129         unsigned long adr;
 130
 131         size = PAGE_ALIGN(size);
 132         mem = vmalloc_32(size);
 133         if (!mem)
 134                 return NULL;
 135
 136         memset(mem, 0, size); /* Clear the ram out, no junk to the user */
 137         adr = (unsigned long) mem;
 138         while (size > 0) {
 139                 SetPageReserved(vmalloc_to_page((void *)adr));
 140                 adr += PAGE_SIZE;
 141                 size -= PAGE_SIZE;
 142         }
 143
 144         return mem;
 145 }
 146
 147 static void usbvision_rvfree(void *mem, unsigned long size)
 148 {
 149         unsigned long adr;
 150
 151         if (!mem)
 152                 return;
 153
 154         size = PAGE_ALIGN(size);
 155
 156         adr = (unsigned long) mem;
 157         while ((long) size > 0) {
 158                 ClearPageReserved(vmalloc_to_page((void *)adr));
 159                 adr += PAGE_SIZE;
 160                 size -= PAGE_SIZE;
 161         }
 162
 163         vfree(mem);
 164 }
 165
 166
 167 #if ENABLE_HEXDUMP
 168 static void usbvision_hexdump(const unsigned char *data, int len)
 169 {
 170         char tmp[80];
 171         int i, k;
 172
 173         for (i = k = 0; len > 0; i++, len--) {
 174                 if (i > 0 && (i % 16 == 0)) {
 175                         printk("%s\n", tmp);
 176                         k = 0;
 177                 }
 178                 k += sprintf(&tmp[k], "%02x ", data[i]);
 179         }
 180         if (k > 0)
 181                 printk("%s\n", tmp);
 182 }
 183 #endif
 184
 185 /********************************
 186  * scratch ring buffer handling
 187  ********************************/
 188 static int scratch_len(struct usb_usbvision *usbvision)    /*This returns the amount of data actually in the buffer */
 189 {
 190         int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
 191         if (len < 0) {
 192                 len += scratch_buf_size;
 193         }
 194         PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
 195
 196         return len;
 197 }
 198
 199
 200 /* This returns the free space left in the buffer */
 201 static int scratch_free(struct usb_usbvision *usbvision)
 202 {
 203         int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
 204         if (free <= 0) {
 205                 free += scratch_buf_size;
 206         }
 207         if (free) {
 208                 free -= 1;                                                      /* at least one byte in the buffer must */
 209                                                                                 /* left blank, otherwise there is no chance to differ between full and empty */
 210         }
 211         PDEBUG(DBG_SCRATCH, "return %d\n", free);
 212
 213         return free;
 214 }
 215
 216
 217 /* This puts data into the buffer */
 218 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
 219                        int len)
 220 {
 221         int len_part;
 222
 223         if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
 224                 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
 225                 usbvision->scratch_write_ptr += len;
 226         }
 227         else {
 228                 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
 229                 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
 230                 if (len == len_part) {
 231                         usbvision->scratch_write_ptr = 0;                       /* just set write_ptr to zero */
 232                 }
 233                 else {
 234                         memcpy(usbvision->scratch, data + len_part, len - len_part);
 235                         usbvision->scratch_write_ptr = len - len_part;
 236                 }
 237         }
 238
 239         PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
 240
 241         return len;
 242 }
 243
 244 /* This marks the write_ptr as position of new frame header */
 245 static void scratch_mark_header(struct usb_usbvision *usbvision)
 246 {
 247         PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
 248
 249         usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
 250                                 usbvision->scratch_write_ptr;
 251         usbvision->scratch_headermarker_write_ptr += 1;
 252         usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
 253 }
 254
 255 /* This gets data from the buffer at the given "ptr" position */
 256 static int scratch_get_extra(struct usb_usbvision *usbvision,
 257                              unsigned char *data, int *ptr, int len)
 258 {
 259         int len_part;
 260         if (*ptr + len < scratch_buf_size) {
 261                 memcpy(data, usbvision->scratch + *ptr, len);
 262                 *ptr += len;
 263         }
 264         else {
 265                 len_part = scratch_buf_size - *ptr;
 266                 memcpy(data, usbvision->scratch + *ptr, len_part);
 267                 if (len == len_part) {
 268                         *ptr = 0;                                                       /* just set the y_ptr to zero */
 269                 }
 270                 else {
 271                         memcpy(data + len_part, usbvision->scratch, len - len_part);
 272                         *ptr = len - len_part;
 273                 }
 274         }
 275
 276         PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
 277
 278         return len;
 279 }
 280
 281
 282 /* This sets the scratch extra read pointer */
 283 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
 284                                   int len)
 285 {
 286         *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size;
 287
 288         PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
 289 }
 290
 291
 292 /*This increments the scratch extra read pointer */
 293 static void scratch_inc_extra_ptr(int *ptr, int len)
 294 {
 295         *ptr = (*ptr + len) % scratch_buf_size;
 296
 297         PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
 298 }
 299
 300
 301 /* This gets data from the buffer */
 302 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
 303                        int len)
 304 {
 305         int len_part;
 306         if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
 307                 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
 308                 usbvision->scratch_read_ptr += len;
 309         }
 310         else {
 311                 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
 312                 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
 313                 if (len == len_part) {
 314                         usbvision->scratch_read_ptr = 0;                                /* just set the read_ptr to zero */
 315                 }
 316                 else {
 317                         memcpy(data + len_part, usbvision->scratch, len - len_part);
 318                         usbvision->scratch_read_ptr = len - len_part;
 319                 }
 320         }
 321
 322         PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
 323
 324         return len;
 325 }
 326
 327
 328 /* This sets read pointer to next header and returns it */
 329 static int scratch_get_header(struct usb_usbvision *usbvision,
 330                               struct usbvision_frame_header *header)
 331 {
 332         int errCode = 0;
 333
 334         PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
 335
 336         while (usbvision->scratch_headermarker_write_ptr -
 337                 usbvision->scratch_headermarker_read_ptr != 0) {
 338                 usbvision->scratch_read_ptr =
 339                         usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
 340                 usbvision->scratch_headermarker_read_ptr += 1;
 341                 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
 342                 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
 343                 if ((header->magic_1 == USBVISION_MAGIC_1)
 344                          && (header->magic_2 == USBVISION_MAGIC_2)
 345                          && (header->headerLength == USBVISION_HEADER_LENGTH)) {
 346                         errCode = USBVISION_HEADER_LENGTH;
 347                         header->frameWidth  = header->frameWidthLo  + (header->frameWidthHi << 8);
 348                         header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8);
 349                         break;
 350                 }
 351         }
 352
 353         return errCode;
 354 }
 355
 356
 357 /*This removes len bytes of old data from the buffer */
 358 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
 359 {
 360
 361         usbvision->scratch_read_ptr += len;
 362         usbvision->scratch_read_ptr %= scratch_buf_size;
 363         PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
 364 }
 365
 366
 367 /*This resets the buffer - kills all data in it too */
 368 static void scratch_reset(struct usb_usbvision *usbvision)
 369 {
 370         PDEBUG(DBG_SCRATCH, "\n");
 371
 372         usbvision->scratch_read_ptr = 0;
 373         usbvision->scratch_write_ptr = 0;
 374         usbvision->scratch_headermarker_read_ptr = 0;
 375         usbvision->scratch_headermarker_write_ptr = 0;
 376         usbvision->isocstate = IsocState_NoFrame;
 377 }
 378
 379 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
 380 {
 381         usbvision->scratch = vmalloc_32(scratch_buf_size);
 382         scratch_reset(usbvision);
 383         if(usbvision->scratch == NULL) {
 384                 dev_err(&usbvision->dev->dev,
 385                         "%s: unable to allocate %d bytes for scratch\n",
 386                                 __func__, scratch_buf_size);
 387                 return -ENOMEM;
 388         }
 389         return 0;
 390 }
 391
 392 void usbvision_scratch_free(struct usb_usbvision *usbvision)
 393 {
 394         if (usbvision->scratch != NULL) {
 395                 vfree(usbvision->scratch);
 396                 usbvision->scratch = NULL;
 397         }
 398 }
 399
 400 /*
 401  * usbvision_testpattern()
 402  *
 403  * Procedure forms a test pattern (yellow grid on blue background).
 404  *
 405  * Parameters:
 406  * fullframe:   if TRUE then entire frame is filled, otherwise the procedure
 407  *              continues from the current scanline.
 408  * pmode        0: fill the frame with solid blue color (like on VCR or TV)
 409  *              1: Draw a colored grid
 410  *
 411  */
 412 static void usbvision_testpattern(struct usb_usbvision *usbvision,
 413                                   int fullframe, int pmode)
 414 {
 415         static const char proc[] = "usbvision_testpattern";
 416         struct usbvision_frame *frame;
 417         unsigned char *f;
 418         int num_cell = 0;
 419         int scan_length = 0;
 420         static int num_pass;
 421
 422         if (usbvision == NULL) {
 423                 printk(KERN_ERR "%s: usbvision == NULL\n", proc);
 424                 return;
 425         }
 426         if (usbvision->curFrame == NULL) {
 427                 printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc);
 428                 return;
 429         }
 430
 431         /* Grab the current frame */
 432         frame = usbvision->curFrame;
 433
 434         /* Optionally start at the beginning */
 435         if (fullframe) {
 436                 frame->curline = 0;
 437                 frame->scanlength = 0;
 438         }
 439
 440         /* Form every scan line */
 441         for (; frame->curline < frame->frmheight; frame->curline++) {
 442                 int i;
 443
 444                 f = frame->data + (usbvision->curwidth * 3 * frame->curline);
 445                 for (i = 0; i < usbvision->curwidth; i++) {
 446                         unsigned char cb = 0x80;
 447                         unsigned char cg = 0;
 448                         unsigned char cr = 0;
 449
 450                         if (pmode == 1) {
 451                                 if (frame->curline % 32 == 0)
 452                                         cb = 0, cg = cr = 0xFF;
 453                                 else if (i % 32 == 0) {
 454                                         if (frame->curline % 32 == 1)
 455                                                 num_cell++;
 456                                         cb = 0, cg = cr = 0xFF;
 457                                 } else {
 458                                         cb =
 459                                             ((num_cell * 7) +
 460                                              num_pass) & 0xFF;
 461                                         cg =
 462                                             ((num_cell * 5) +
 463                                              num_pass * 2) & 0xFF;
 464                                         cr =
 465                                             ((num_cell * 3) +
 466                                              num_pass * 3) & 0xFF;
 467                                 }
 468                         } else {
 469                                 /* Just the blue screen */
 470                         }
 471
 472                         *f++ = cb;
 473                         *f++ = cg;
 474                         *f++ = cr;
 475                         scan_length += 3;
 476                 }
 477         }
 478
 479         frame->grabstate = FrameState_Done;
 480         frame->scanlength += scan_length;
 481         ++num_pass;
 482
 483 }
 484
 485 /*
 486  * usbvision_decompress_alloc()
 487  *
 488  * allocates intermediate buffer for decompression
 489  */
 490 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
 491 {
 492         int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
 493         usbvision->IntraFrameBuffer = vmalloc_32(IFB_size);
 494         if (usbvision->IntraFrameBuffer == NULL) {
 495                 dev_err(&usbvision->dev->dev,
 496                         "%s: unable to allocate %d for compr. frame buffer\n",
 497                                 __func__, IFB_size);
 498                 return -ENOMEM;
 499         }
 500         return 0;
 501 }
 502
 503 /*
 504  * usbvision_decompress_free()
 505  *
 506  * frees intermediate buffer for decompression
 507  */
 508 void usbvision_decompress_free(struct usb_usbvision *usbvision)
 509 {
 510         if (usbvision->IntraFrameBuffer != NULL) {
 511                 vfree(usbvision->IntraFrameBuffer);
 512                 usbvision->IntraFrameBuffer = NULL;
 513         }
 514 }
 515
 516 /************************************************************
 517  * Here comes the data parsing stuff that is run as interrupt
 518  ************************************************************/
 519 /*
 520  * usbvision_find_header()
 521  *
 522  * Locate one of supported header markers in the scratch buffer.
 523  */
 524 static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision)
 525 {
 526         struct usbvision_frame *frame;
 527         int foundHeader = 0;
 528
 529         frame = usbvision->curFrame;
 530
 531         while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) {
 532                 // found header in scratch
 533                 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
 534                                 frame->isocHeader.magic_2,
 535                                 frame->isocHeader.magic_1,
 536                                 frame->isocHeader.headerLength,
 537                                 frame->isocHeader.frameNum,
 538                                 frame->isocHeader.framePhase,
 539                                 frame->isocHeader.frameLatency,
 540                                 frame->isocHeader.dataFormat,
 541                                 frame->isocHeader.formatParam,
 542                                 frame->isocHeader.frameWidth,
 543                                 frame->isocHeader.frameHeight);
 544
 545                 if (usbvision->requestIntra) {
 546                         if (frame->isocHeader.formatParam & 0x80) {
 547                                 foundHeader = 1;
 548                                 usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time
 549                                 usbvision_unrequest_intra(usbvision);
 550                                 break;
 551                         }
 552                 }
 553                 else {
 554                         foundHeader = 1;
 555                         break;
 556                 }
 557         }
 558
 559         if (foundHeader) {
 560                 frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width;
 561                 frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height;
 562                 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3;
 563         }
 564         else { // no header found
 565                 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
 566                 scratch_reset(usbvision);
 567                 return ParseState_EndParse;
 568         }
 569
 570         // found header
 571         if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) {
 572                 //check isocHeader.frameNum for lost frames
 573                 if (usbvision->lastIsocFrameNum >= 0) {
 574                         if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) {
 575                                 // unexpected frame drop: need to request new intra frame
 576                                 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum);
 577                                 usbvision_request_intra(usbvision);
 578                                 return ParseState_NextFrame;
 579                         }
 580                 }
 581                 usbvision->lastIsocFrameNum = frame->isocHeader.frameNum;
 582         }
 583         usbvision->header_count++;
 584         frame->scanstate = ScanState_Lines;
 585         frame->curline = 0;
 586
 587         if (force_testpattern) {
 588                 usbvision_testpattern(usbvision, 1, 1);
 589                 return ParseState_NextFrame;
 590         }
 591         return ParseState_Continue;
 592 }
 593
 594 static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision,
 595                                            long *pcopylen)
 596 {
 597         volatile struct usbvision_frame *frame;
 598         unsigned char *f;
 599         int len;
 600         int i;
 601         unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components
 602         unsigned char rv, gv, bv;       // RGB components
 603         int clipmask_index, bytes_per_pixel;
 604         int stretch_bytes, clipmask_add;
 605
 606         frame  = usbvision->curFrame;
 607         f = frame->data + (frame->v4l2_linesize * frame->curline);
 608
 609         /* Make sure there's enough data for the entire line */
 610         len = (frame->isocHeader.frameWidth * 2)+5;
 611         if (scratch_len(usbvision) < len) {
 612                 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
 613                 return ParseState_Out;
 614         }
 615
 616         if ((frame->curline + 1) >= frame->frmheight) {
 617                 return ParseState_NextFrame;
 618         }
 619
 620         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
 621         stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
 622         clipmask_index = frame->curline * MAX_FRAME_WIDTH;
 623         clipmask_add = usbvision->stretch_width;
 624
 625         for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) {
 626
 627                 scratch_get(usbvision, &yuyv[0], 4);
 628
 629                 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 630                         *f++ = yuyv[0]; // Y
 631                         *f++ = yuyv[3]; // U
 632                 }
 633                 else {
 634
 635                         YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
 636                         switch (frame->v4l2_format.format) {
 637                         case V4L2_PIX_FMT_RGB565:
 638                                 *f++ = (0x1F & rv) |
 639                                         (0xE0 & (gv << 5));
 640                                 *f++ = (0x07 & (gv >> 3)) |
 641                                         (0xF8 &  bv);
 642                                 break;
 643                         case V4L2_PIX_FMT_RGB24:
 644                                 *f++ = rv;
 645                                 *f++ = gv;
 646                                 *f++ = bv;
 647                                 break;
 648                         case V4L2_PIX_FMT_RGB32:
 649                                 *f++ = rv;
 650                                 *f++ = gv;
 651                                 *f++ = bv;
 652                                 f++;
 653                                 break;
 654                         case V4L2_PIX_FMT_RGB555:
 655                                 *f++ = (0x1F & rv) |
 656                                         (0xE0 & (gv << 5));
 657                                 *f++ = (0x03 & (gv >> 3)) |
 658                                         (0x7C & (bv << 2));
 659                                 break;
 660                         }
 661                 }
 662                 clipmask_index += clipmask_add;
 663                 f += stretch_bytes;
 664
 665                 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 666                         *f++ = yuyv[2]; // Y
 667                         *f++ = yuyv[1]; // V
 668                 }
 669                 else {
 670
 671                         YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
 672                         switch (frame->v4l2_format.format) {
 673                         case V4L2_PIX_FMT_RGB565:
 674                                 *f++ = (0x1F & rv) |
 675                                         (0xE0 & (gv << 5));
 676                                 *f++ = (0x07 & (gv >> 3)) |
 677                                         (0xF8 &  bv);
 678                                 break;
 679                         case V4L2_PIX_FMT_RGB24:
 680                                 *f++ = rv;
 681                                 *f++ = gv;
 682                                 *f++ = bv;
 683                                 break;
 684                         case V4L2_PIX_FMT_RGB32:
 685                                 *f++ = rv;
 686                                 *f++ = gv;
 687                                 *f++ = bv;
 688                                 f++;
 689                                 break;
 690                         case V4L2_PIX_FMT_RGB555:
 691                                 *f++ = (0x1F & rv) |
 692                                         (0xE0 & (gv << 5));
 693                                 *f++ = (0x03 & (gv >> 3)) |
 694                                         (0x7C & (bv << 2));
 695                                 break;
 696                         }
 697                 }
 698                 clipmask_index += clipmask_add;
 699                 f += stretch_bytes;
 700         }
 701
 702         frame->curline += usbvision->stretch_height;
 703         *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
 704
 705         if (frame->curline >= frame->frmheight) {
 706                 return ParseState_NextFrame;
 707         }
 708         else {
 709                 return ParseState_Continue;
 710         }
 711 }
 712
 713 /* The decompression routine  */
 714 static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed,
 715                                                                 unsigned char *Decompressed, int *StartPos,
 716                                                                 int *BlockTypeStartPos, int Len)
 717 {
 718         int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen;
 719         unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator;
 720
 721         Integrator = 0;
 722         Pos = *StartPos;
 723         BlockTypePos = *BlockTypeStartPos;
 724         MaxPos = 396; //Pos + Len;
 725         ExtraPos = Pos;
 726         BlockLen = 0;
 727         BlockByte = 0;
 728         BlockCode = 0;
 729         BlockType = 0;
 730         BlockTypeByte = 0;
 731         BlockTypeLen = 0;
 732         RestPixel = Len;
 733
 734         for (Idx = 0; Idx < Len; Idx++) {
 735
 736                 if (BlockLen == 0) {
 737                         if (BlockTypeLen==0) {
 738                                 BlockTypeByte = Compressed[BlockTypePos];
 739                                 BlockTypePos++;
 740                                 BlockTypeLen = 4;
 741                         }
 742                         BlockType = (BlockTypeByte & 0xC0) >> 6;
 743
 744                         //statistic:
 745                         usbvision->ComprBlockTypes[BlockType]++;
 746
 747                         Pos = ExtraPos;
 748                         if (BlockType == 0) {
 749                                 if(RestPixel >= 24) {
 750                                         Idx += 23;
 751                                         RestPixel -= 24;
 752                                         Integrator = Decompressed[Idx];
 753                                 } else {
 754                                         Idx += RestPixel - 1;
 755                                         RestPixel = 0;
 756                                 }
 757                         } else {
 758                                 BlockCode = Compressed[Pos];
 759                                 Pos++;
 760                                 if (RestPixel >= 24) {
 761                                         BlockLen  = 24;
 762                                 } else {
 763                                         BlockLen = RestPixel;
 764                                 }
 765                                 RestPixel -= BlockLen;
 766                                 ExtraPos = Pos + (BlockLen / 4);
 767                         }
 768                         BlockTypeByte <<= 2;
 769                         BlockTypeLen -= 1;
 770                 }
 771                 if (BlockLen > 0) {
 772                         if ((BlockLen%4) == 0) {
 773                                 BlockByte = Compressed[Pos];
 774                                 Pos++;
 775                         }
 776                         if (BlockType == 1) { //inter Block
 777                                 Integrator = Decompressed[Idx];
 778                         }
 779                         switch (BlockByte & 0xC0) {
 780                                 case 0x03<<6:
 781                                         Integrator += Compressed[ExtraPos];
 782                                         ExtraPos++;
 783                                         break;
 784                                 case 0x02<<6:
 785                                         Integrator += BlockCode;
 786                                         break;
 787                                 case 0x00:
 788                                         Integrator -= BlockCode;
 789                                         break;
 790                         }
 791                         Decompressed[Idx] = Integrator;
 792                         BlockByte <<= 2;
 793                         BlockLen -= 1;
 794                 }
 795         }
 796         *StartPos = ExtraPos;
 797         *BlockTypeStartPos = BlockTypePos;
 798         return Idx;
 799 }
 800
 801
 802 /*
 803  * usbvision_parse_compress()
 804  *
 805  * Parse compressed frame from the scratch buffer, put
 806  * decoded RGB value into the current frame buffer and add the written
 807  * number of bytes (RGB) to the *pcopylen.
 808  *
 809  */
 810 static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision,
 811                                            long *pcopylen)
 812 {
 813 #define USBVISION_STRIP_MAGIC           0x5A
 814 #define USBVISION_STRIP_LEN_MAX         400
 815 #define USBVISION_STRIP_HEADER_LEN      3
 816
 817         struct usbvision_frame *frame;
 818         unsigned char *f,*u = NULL ,*v = NULL;
 819         unsigned char StripData[USBVISION_STRIP_LEN_MAX];
 820         unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN];
 821         int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos;
 822         int clipmask_index, bytes_per_pixel, rc;
 823         int imageSize;
 824         unsigned char rv, gv, bv;
 825         static unsigned char *Y, *U, *V;
 826
 827         frame  = usbvision->curFrame;
 828         imageSize = frame->frmwidth * frame->frmheight;
 829         if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
 830              (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) {       // this is a planar format
 831                 //... v4l2_linesize not used here.
 832                 f = frame->data + (frame->width * frame->curline);
 833         } else
 834                 f = frame->data + (frame->v4l2_linesize * frame->curline);
 835
 836         if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers
 837                 // get base of u and b planes add halfoffset
 838
 839                 u = frame->data
 840                         + imageSize
 841                         + (frame->frmwidth >>1) * frame->curline ;
 842                 v = u + (imageSize >>1 );
 843
 844         } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){
 845
 846                 v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ;
 847                 u = v + (imageSize >>2) ;
 848         }
 849
 850         if (frame->curline == 0) {
 851                 usbvision_adjust_compression(usbvision);
 852         }
 853
 854         if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) {
 855                 return ParseState_Out;
 856         }
 857
 858         //get strip header without changing the scratch_read_ptr
 859         scratch_set_extra_ptr(usbvision, &StripPtr, 0);
 860         scratch_get_extra(usbvision, &StripHeader[0], &StripPtr,
 861                                 USBVISION_STRIP_HEADER_LEN);
 862
 863         if (StripHeader[0] != USBVISION_STRIP_MAGIC) {
 864                 // wrong strip magic
 865                 usbvision->stripMagicErrors++;
 866                 return ParseState_NextFrame;
 867         }
 868
 869         if (frame->curline != (int)StripHeader[2]) {
 870                 //line number missmatch error
 871                 usbvision->stripLineNumberErrors++;
 872         }
 873
 874         StripLen = 2 * (unsigned int)StripHeader[1];
 875         if (StripLen > USBVISION_STRIP_LEN_MAX) {
 876                 // strip overrun
 877                 // I think this never happens
 878                 usbvision_request_intra(usbvision);
 879         }
 880
 881         if (scratch_len(usbvision) < StripLen) {
 882                 //there is not enough data for the strip
 883                 return ParseState_Out;
 884         }
 885
 886         if (usbvision->IntraFrameBuffer) {
 887                 Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline;
 888                 U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2);
 889                 V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
 890         }
 891         else {
 892                 return ParseState_NextFrame;
 893         }
 894
 895         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
 896         clipmask_index = frame->curline * MAX_FRAME_WIDTH;
 897
 898         scratch_get(usbvision, StripData, StripLen);
 899
 900         IdxEnd = frame->frmwidth;
 901         BlockTypePos = USBVISION_STRIP_HEADER_LEN;
 902         StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2;
 903         BlockPos = StartBlockPos;
 904
 905         usbvision->BlockPos = BlockPos;
 906
 907         if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) {
 908                 //return ParseState_Continue;
 909         }
 910         if (StripLen > usbvision->maxStripLen) {
 911                 usbvision->maxStripLen = StripLen;
 912         }
 913
 914         if (frame->curline%2) {
 915                 if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
 916                 //return ParseState_Continue;
 917                 }
 918         }
 919         else {
 920                 if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
 921                         //return ParseState_Continue;
 922                 }
 923         }
 924
 925         if (BlockPos > usbvision->comprBlockPos) {
 926                 usbvision->comprBlockPos = BlockPos;
 927         }
 928         if (BlockPos > StripLen) {
 929                 usbvision->stripLenErrors++;
 930         }
 931
 932         for (Idx = 0; Idx < IdxEnd; Idx++) {
 933                 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 934                         *f++ = Y[Idx];
 935                         *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2];
 936                 }
 937                 else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
 938                         *f++ = Y[Idx];
 939                         if ( Idx & 0x01)
 940                                 *u++ = U[Idx>>1] ;
 941                         else
 942                                 *v++ = V[Idx>>1];
 943                 }
 944                 else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
 945                         *f++ = Y [Idx];
 946                         if ( !((  Idx & 0x01  ) | (  frame->curline & 0x01  )) ){
 947
 948 /*                               only need do this for 1 in 4 pixels */
 949 /*                               intraframe buffer is YUV420 format */
 950
 951                                 *u++ = U[Idx >>1];
 952                                 *v++ = V[Idx >>1];
 953                         }
 954
 955                 }
 956                 else {
 957                         YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv);
 958                         switch (frame->v4l2_format.format) {
 959                                 case V4L2_PIX_FMT_GREY:
 960                                         *f++ = Y[Idx];
 961                                         break;
 962                                 case V4L2_PIX_FMT_RGB555:
 963                                         *f++ = (0x1F & rv) |
 964                                                 (0xE0 & (gv << 5));
 965                                         *f++ = (0x03 & (gv >> 3)) |
 966                                                 (0x7C & (bv << 2));
 967                                         break;
 968                                 case V4L2_PIX_FMT_RGB565:
 969                                         *f++ = (0x1F & rv) |
 970                                                 (0xE0 & (gv << 5));
 971                                         *f++ = (0x07 & (gv >> 3)) |
 972                                                 (0xF8 &  bv);
 973                                         break;
 974                                 case V4L2_PIX_FMT_RGB24:
 975                                         *f++ = rv;
 976                                         *f++ = gv;
 977                                         *f++ = bv;
 978                                         break;
 979                                 case V4L2_PIX_FMT_RGB32:
 980                                         *f++ = rv;
 981                                         *f++ = gv;
 982                                         *f++ = bv;
 983                                         f++;
 984                                         break;
 985                         }
 986                 }
 987                 clipmask_index++;
 988         }
 989         /* Deal with non-integer no. of bytes for YUV420P */
 990         if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 )
 991                 *pcopylen += frame->v4l2_linesize;
 992         else
 993                 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
 994
 995         frame->curline += 1;
 996
 997         if (frame->curline >= frame->frmheight) {
 998                 return ParseState_NextFrame;
 999         }
1000         else {
1001                 return ParseState_Continue;
1002         }
1003
1004 }
1005
1006
1007 /*
1008  * usbvision_parse_lines_420()
1009  *
1010  * Parse two lines from the scratch buffer, put
1011  * decoded RGB value into the current frame buffer and add the written
1012  * number of bytes (RGB) to the *pcopylen.
1013  *
1014  */
1015 static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision,
1016                                            long *pcopylen)
1017 {
1018         struct usbvision_frame *frame;
1019         unsigned char *f_even = NULL, *f_odd = NULL;
1020         unsigned int pixel_per_line, block;
1021         int pixel, block_split;
1022         int y_ptr, u_ptr, v_ptr, y_odd_offset;
1023         const int   y_block_size = 128;
1024         const int  uv_block_size = 64;
1025         const int sub_block_size = 32;
1026         const int y_step[] = { 0, 0, 0, 2 },  y_step_size = 4;
1027         const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4;
1028         unsigned char y[2], u, v;       /* YUV components */
1029         int y_, u_, v_, vb, uvg, ur;
1030         int r_, g_, b_;                 /* RGB components */
1031         unsigned char g;
1032         int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
1033         int clipmask_add, stretch_bytes;
1034
1035         frame  = usbvision->curFrame;
1036         f_even = frame->data + (frame->v4l2_linesize * frame->curline);
1037         f_odd  = f_even + frame->v4l2_linesize * usbvision->stretch_height;
1038
1039         /* Make sure there's enough data for the entire line */
1040         /* In this mode usbvision transfer 3 bytes for every 2 pixels */
1041         /* I need two lines to decode the color */
1042         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
1043         stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
1044         clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
1045         clipmask_odd_index  = clipmask_even_index + MAX_FRAME_WIDTH;
1046         clipmask_add = usbvision->stretch_width;
1047         pixel_per_line = frame->isocHeader.frameWidth;
1048
1049         if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
1050                 //printk(KERN_DEBUG "out of data, need %d\n", len);
1051                 return ParseState_Out;
1052         }
1053
1054         if ((frame->curline + 1) >= frame->frmheight) {
1055                 return ParseState_NextFrame;
1056         }
1057
1058         block_split = (pixel_per_line%y_block_size) ? 1 : 0;    //are some blocks splitted into different lines?
1059
1060         y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
1061                         + block_split * uv_block_size;
1062
1063         scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
1064         scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
1065         scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
1066                         + (4 - block_split) * sub_block_size);
1067
1068         for (block = 0; block < (pixel_per_line / sub_block_size);
1069              block++) {
1070
1071
1072                 for (pixel = 0; pixel < sub_block_size; pixel +=2) {
1073                         scratch_get(usbvision, &y[0], 2);
1074                         scratch_get_extra(usbvision, &u, &u_ptr, 1);
1075                         scratch_get_extra(usbvision, &v, &v_ptr, 1);
1076
1077                         //I don't use the YUV_TO_RGB macro for better performance
1078                         v_ = v - 128;
1079                         u_ = u - 128;
1080                         vb =              132252 * v_;
1081                         uvg= -53281 * u_ - 25625 * v_;
1082                         ur = 104595 * u_;
1083
1084                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1085                                 *f_even++ = y[0];
1086                                 *f_even++ = v;
1087                         }
1088                         else {
1089                                 y_ = 76284 * (y[0] - 16);
1090
1091                                 b_ = (y_ + vb) >> 16;
1092                                 g_ = (y_ + uvg)>> 16;
1093                                 r_ = (y_ + ur) >> 16;
1094
1095                                 switch (frame->v4l2_format.format) {
1096                                 case V4L2_PIX_FMT_RGB565:
1097                                         g = LIMIT_RGB(g_);
1098                                         *f_even++ =
1099                                                 (0x1F & LIMIT_RGB(r_)) |
1100                                                 (0xE0 & (g << 5));
1101                                         *f_even++ =
1102                                                 (0x07 & (g >> 3)) |
1103                                                 (0xF8 &  LIMIT_RGB(b_));
1104                                         break;
1105                                 case V4L2_PIX_FMT_RGB24:
1106                                         *f_even++ = LIMIT_RGB(r_);
1107                                         *f_even++ = LIMIT_RGB(g_);
1108                                         *f_even++ = LIMIT_RGB(b_);
1109                                         break;
1110                                 case V4L2_PIX_FMT_RGB32:
1111                                         *f_even++ = LIMIT_RGB(r_);
1112                                         *f_even++ = LIMIT_RGB(g_);
1113                                         *f_even++ = LIMIT_RGB(b_);
1114                                         f_even++;
1115                                         break;
1116                                 case V4L2_PIX_FMT_RGB555:
1117                                         g = LIMIT_RGB(g_);
1118                                         *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1119                                                 (0xE0 & (g << 5));
1120                                         *f_even++ = (0x03 & (g >> 3)) |
1121                                                 (0x7C & (LIMIT_RGB(b_) << 2));
1122                                         break;
1123                                 }
1124                         }
1125                         clipmask_even_index += clipmask_add;
1126                         f_even += stretch_bytes;
1127
1128                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1129                                 *f_even++ = y[1];
1130                                 *f_even++ = u;
1131                         }
1132                         else {
1133                                 y_ = 76284 * (y[1] - 16);
1134
1135                                 b_ = (y_ + vb) >> 16;
1136                                 g_ = (y_ + uvg)>> 16;
1137                                 r_ = (y_ + ur) >> 16;
1138
1139                                 switch (frame->v4l2_format.format) {
1140                                 case V4L2_PIX_FMT_RGB565:
1141                                         g = LIMIT_RGB(g_);
1142                                         *f_even++ =
1143                                                 (0x1F & LIMIT_RGB(r_)) |
1144                                                 (0xE0 & (g << 5));
1145                                         *f_even++ =
1146                                                 (0x07 & (g >> 3)) |
1147                                                 (0xF8 &  LIMIT_RGB(b_));
1148                                         break;
1149                                 case V4L2_PIX_FMT_RGB24:
1150                                         *f_even++ = LIMIT_RGB(r_);
1151                                         *f_even++ = LIMIT_RGB(g_);
1152                                         *f_even++ = LIMIT_RGB(b_);
1153                                         break;
1154                                 case V4L2_PIX_FMT_RGB32:
1155                                         *f_even++ = LIMIT_RGB(r_);
1156                                         *f_even++ = LIMIT_RGB(g_);
1157                                         *f_even++ = LIMIT_RGB(b_);
1158                                         f_even++;
1159                                         break;
1160                                 case V4L2_PIX_FMT_RGB555:
1161                                         g = LIMIT_RGB(g_);
1162                                         *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1163                                                 (0xE0 & (g << 5));
1164                                         *f_even++ = (0x03 & (g >> 3)) |
1165                                                 (0x7C & (LIMIT_RGB(b_) << 2));
1166                                         break;
1167                                 }
1168                         }
1169                         clipmask_even_index += clipmask_add;
1170                         f_even += stretch_bytes;
1171
1172                         scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1173
1174                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1175                                 *f_odd++ = y[0];
1176                                 *f_odd++ = v;
1177                         }
1178                         else {
1179                                 y_ = 76284 * (y[0] - 16);
1180
1181                                 b_ = (y_ + vb) >> 16;
1182                                 g_ = (y_ + uvg)>> 16;
1183                                 r_ = (y_ + ur) >> 16;
1184
1185                                 switch (frame->v4l2_format.format) {
1186                                 case V4L2_PIX_FMT_RGB565:
1187                                         g = LIMIT_RGB(g_);
1188                                         *f_odd++ =
1189                                                 (0x1F & LIMIT_RGB(r_)) |
1190                                                 (0xE0 & (g << 5));
1191                                         *f_odd++ =
1192                                                 (0x07 & (g >> 3)) |
1193                                                 (0xF8 &  LIMIT_RGB(b_));
1194                                         break;
1195                                 case V4L2_PIX_FMT_RGB24:
1196                                         *f_odd++ = LIMIT_RGB(r_);
1197                                         *f_odd++ = LIMIT_RGB(g_);
1198                                         *f_odd++ = LIMIT_RGB(b_);
1199                                         break;
1200                                 case V4L2_PIX_FMT_RGB32:
1201                                         *f_odd++ = LIMIT_RGB(r_);
1202                                         *f_odd++ = LIMIT_RGB(g_);
1203                                         *f_odd++ = LIMIT_RGB(b_);
1204                                         f_odd++;
1205                                         break;
1206                                 case V4L2_PIX_FMT_RGB555:
1207                                         g = LIMIT_RGB(g_);
1208                                         *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1209                                                 (0xE0 & (g << 5));
1210                                         *f_odd++ = (0x03 & (g >> 3)) |
1211                                                 (0x7C & (LIMIT_RGB(b_) << 2));
1212                                         break;
1213                                 }
1214                         }
1215                         clipmask_odd_index += clipmask_add;
1216                         f_odd += stretch_bytes;
1217
1218                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1219                                 *f_odd++ = y[1];
1220                                 *f_odd++ = u;
1221                         }
1222                         else {
1223                                 y_ = 76284 * (y[1] - 16);
1224
1225                                 b_ = (y_ + vb) >> 16;
1226                                 g_ = (y_ + uvg)>> 16;
1227                                 r_ = (y_ + ur) >> 16;
1228
1229                                 switch (frame->v4l2_format.format) {
1230                                 case V4L2_PIX_FMT_RGB565:
1231                                         g = LIMIT_RGB(g_);
1232                                         *f_odd++ =
1233                                                 (0x1F & LIMIT_RGB(r_)) |
1234                                                 (0xE0 & (g << 5));
1235                                         *f_odd++ =
1236                                                 (0x07 & (g >> 3)) |
1237                                                 (0xF8 &  LIMIT_RGB(b_));
1238                                         break;
1239                                 case V4L2_PIX_FMT_RGB24:
1240                                         *f_odd++ = LIMIT_RGB(r_);
1241                                         *f_odd++ = LIMIT_RGB(g_);
1242                                         *f_odd++ = LIMIT_RGB(b_);
1243                                         break;
1244                                 case V4L2_PIX_FMT_RGB32:
1245                                         *f_odd++ = LIMIT_RGB(r_);
1246                                         *f_odd++ = LIMIT_RGB(g_);
1247                                         *f_odd++ = LIMIT_RGB(b_);
1248                                         f_odd++;
1249                                         break;
1250                                 case V4L2_PIX_FMT_RGB555:
1251                                         g = LIMIT_RGB(g_);
1252                                         *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1253                                                 (0xE0 & (g << 5));
1254                                         *f_odd++ = (0x03 & (g >> 3)) |
1255                                                 (0x7C & (LIMIT_RGB(b_) << 2));
1256                                         break;
1257                                 }
1258                         }
1259                         clipmask_odd_index += clipmask_add;
1260                         f_odd += stretch_bytes;
1261                 }
1262
1263                 scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size);
1264                 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1265                                 * sub_block_size);
1266                 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1267                                 * sub_block_size);
1268                 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1269                                 * sub_block_size);
1270         }
1271
1272         scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1273                         + block_split * sub_block_size);
1274
1275         frame->curline += 2 * usbvision->stretch_height;
1276         *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1277
1278         if (frame->curline >= frame->frmheight)
1279                 return ParseState_NextFrame;
1280         else
1281                 return ParseState_Continue;
1282 }
1283
1284 /*
1285  * usbvision_parse_data()
1286  *
1287  * Generic routine to parse the scratch buffer. It employs either
1288  * usbvision_find_header() or usbvision_parse_lines() to do most
1289  * of work.
1290  *
1291  */
1292 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1293 {
1294         struct usbvision_frame *frame;
1295         enum ParseState newstate;
1296         long copylen = 0;
1297         unsigned long lock_flags;
1298
1299         frame = usbvision->curFrame;
1300
1301         PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1302
1303         while (1) {
1304
1305                 newstate = ParseState_Out;
1306                 if (scratch_len(usbvision)) {
1307                         if (frame->scanstate == ScanState_Scanning) {
1308                                 newstate = usbvision_find_header(usbvision);
1309                         }
1310                         else if (frame->scanstate == ScanState_Lines) {
1311                                 if (usbvision->isocMode == ISOC_MODE_YUV420) {
1312                                         newstate = usbvision_parse_lines_420(usbvision, &copylen);
1313                                 }
1314                                 else if (usbvision->isocMode == ISOC_MODE_YUV422) {
1315                                         newstate = usbvision_parse_lines_422(usbvision, &copylen);
1316                                 }
1317                                 else if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
1318                                         newstate = usbvision_parse_compress(usbvision, &copylen);
1319                                 }
1320
1321                         }
1322                 }
1323                 if (newstate == ParseState_Continue) {
1324                         continue;
1325                 }
1326                 else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) {
1327                         break;
1328                 }
1329                 else {
1330                         return; /* ParseState_EndParse */
1331                 }
1332         }
1333
1334         if (newstate == ParseState_NextFrame) {
1335                 frame->grabstate = FrameState_Done;
1336                 do_gettimeofday(&(frame->timestamp));
1337                 frame->sequence = usbvision->frame_num;
1338
1339                 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1340                 list_move_tail(&(frame->frame), &usbvision->outqueue);
1341                 usbvision->curFrame = NULL;
1342                 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1343
1344                 usbvision->frame_num++;
1345
1346                 /* This will cause the process to request another frame. */
1347                 if (waitqueue_active(&usbvision->wait_frame)) {
1348                         PDEBUG(DBG_PARSE, "Wake up !");
1349                         wake_up_interruptible(&usbvision->wait_frame);
1350                 }
1351         }
1352         else
1353                 frame->grabstate = FrameState_Grabbing;
1354
1355
1356         /* Update the frame's uncompressed length. */
1357         frame->scanlength += copylen;
1358 }
1359
1360
1361 /*
1362  * Make all of the blocks of data contiguous
1363  */
1364 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1365                                           struct urb *urb)
1366 {
1367         unsigned char *packet_data;
1368         int i, totlen = 0;
1369
1370         for (i = 0; i < urb->number_of_packets; i++) {
1371                 int packet_len = urb->iso_frame_desc[i].actual_length;
1372                 int packet_stat = urb->iso_frame_desc[i].status;
1373
1374                 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1375
1376                 /* Detect and ignore errored packets */
1377                 if (packet_stat) {      // packet_stat != 0 ?????????????
1378                         PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1379                         usbvision->isocErrCount++;
1380                         continue;
1381                 }
1382
1383                 /* Detect and ignore empty packets */
1384                 if (packet_len < 0) {
1385                         PDEBUG(DBG_ISOC, "error packet [%d]", i);
1386                         usbvision->isocSkipCount++;
1387                         continue;
1388                 }
1389                 else if (packet_len == 0) {     /* Frame end ????? */
1390                         PDEBUG(DBG_ISOC, "null packet [%d]", i);
1391                         usbvision->isocstate=IsocState_NoFrame;
1392                         usbvision->isocSkipCount++;
1393                         continue;
1394                 }
1395                 else if (packet_len > usbvision->isocPacketSize) {
1396                         PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i);
1397                         usbvision->isocSkipCount++;
1398                         continue;
1399                 }
1400
1401                 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1402
1403                 if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins
1404                         usbvision->isocstate=IsocState_InFrame;
1405                         scratch_mark_header(usbvision);
1406                         usbvision_measure_bandwidth(usbvision);
1407                         PDEBUG(DBG_ISOC, "packet with header");
1408                 }
1409
1410                 /*
1411                  * If usbvision continues to feed us with data but there is no
1412                  * consumption (if, for example, V4L client fell asleep) we
1413                  * may overflow the buffer. We have to move old data over to
1414                  * free room for new data. This is bad for old data. If we
1415                  * just drop new data then it's bad for new data... choose
1416                  * your favorite evil here.
1417                  */
1418                 if (scratch_free(usbvision) < packet_len) {
1419
1420                         usbvision->scratch_ovf_count++;
1421                         PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1422                                scratch_len(usbvision), packet_len);
1423                         scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1424                 }
1425
1426                 /* Now we know that there is enough room in scratch buffer */
1427                 scratch_put(usbvision, packet_data, packet_len);
1428                 totlen += packet_len;
1429                 usbvision->isocDataCount += packet_len;
1430                 usbvision->isocPacketCount++;
1431         }
1432 #if ENABLE_HEXDUMP
1433         if (totlen > 0) {
1434                 static int foo;
1435                 if (foo < 1) {
1436                         printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1437                         usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1438                         ++foo;
1439                 }
1440         }
1441 #endif
1442  return totlen;
1443 }
1444
1445 static void usbvision_isocIrq(struct urb *urb)
1446 {
1447         int errCode = 0;
1448         int len;
1449         struct usb_usbvision *usbvision = urb->context;
1450         int i;
1451         unsigned long startTime = jiffies;
1452         struct usbvision_frame **f;
1453
1454         /* We don't want to do anything if we are about to be removed! */
1455         if (!USBVISION_IS_OPERATIONAL(usbvision))
1456                 return;
1457
1458         /* any urb with wrong status is ignored without acknowledgement */
1459         if (urb->status == -ENOENT) {
1460                 return;
1461         }
1462
1463         f = &usbvision->curFrame;
1464
1465         /* Manage streaming interruption */
1466         if (usbvision->streaming == Stream_Interrupt) {
1467                 usbvision->streaming = Stream_Idle;
1468                 if ((*f)) {
1469                         (*f)->grabstate = FrameState_Ready;
1470                         (*f)->scanstate = ScanState_Scanning;
1471                 }
1472                 PDEBUG(DBG_IRQ, "stream interrupted");
1473                 wake_up_interruptible(&usbvision->wait_stream);
1474         }
1475
1476         /* Copy the data received into our scratch buffer */
1477         len = usbvision_compress_isochronous(usbvision, urb);
1478
1479         usbvision->isocUrbCount++;
1480         usbvision->urb_length = len;
1481
1482         if (usbvision->streaming == Stream_On) {
1483
1484                 /* If we collected enough data let's parse! */
1485                 if ((scratch_len(usbvision) > USBVISION_HEADER_LENGTH) &&
1486                     (!list_empty(&(usbvision->inqueue))) ) {
1487                         if (!(*f)) {
1488                                 (*f) = list_entry(usbvision->inqueue.next,
1489                                                   struct usbvision_frame,
1490                                                   frame);
1491                         }
1492                         usbvision_parse_data(usbvision);
1493                 }
1494                 else {
1495                         /*If we don't have a frame
1496                           we're current working on, complain */
1497                         PDEBUG(DBG_IRQ,
1498                                "received data, but no one needs it");
1499                         scratch_reset(usbvision);
1500                 }
1501         }
1502         else {
1503                 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1504                 scratch_reset(usbvision);
1505         }
1506
1507         usbvision->timeInIrq += jiffies - startTime;
1508
1509         for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1510                 urb->iso_frame_desc[i].status = 0;
1511                 urb->iso_frame_desc[i].actual_length = 0;
1512         }
1513
1514         urb->status = 0;
1515         urb->dev = usbvision->dev;
1516         errCode = usb_submit_urb (urb, GFP_ATOMIC);
1517
1518         if(errCode) {
1519                 dev_err(&usbvision->dev->dev,
1520                         "%s: usb_submit_urb failed: error %d\n",
1521                                 __func__, errCode);
1522         }
1523
1524         return;
1525 }
1526
1527 /*************************************/
1528 /* Low level usbvision access functions */
1529 /*************************************/
1530
1531 /*
1532  * usbvision_read_reg()
1533  *
1534  * return  < 0 -> Error
1535  *        >= 0 -> Data
1536  */
1537
1538 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1539 {
1540         int errCode = 0;
1541         unsigned char buffer[1];
1542
1543         if (!USBVISION_IS_OPERATIONAL(usbvision))
1544                 return -1;
1545
1546         errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1547                                 USBVISION_OP_CODE,
1548                                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1549                                 0, (__u16) reg, buffer, 1, HZ);
1550
1551         if (errCode < 0) {
1552                 dev_err(&usbvision->dev->dev,
1553                         "%s: failed: error %d\n", __func__, errCode);
1554                 return errCode;
1555         }
1556         return buffer[0];
1557 }
1558
1559 /*
1560  * usbvision_write_reg()
1561  *
1562  * return 1 -> Reg written
1563  *        0 -> usbvision is not yet ready
1564  *       -1 -> Something went wrong
1565  */
1566
1567 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1568                             unsigned char value)
1569 {
1570         int errCode = 0;
1571
1572         if (!USBVISION_IS_OPERATIONAL(usbvision))
1573                 return 0;
1574
1575         errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1576                                 USBVISION_OP_CODE,
1577                                 USB_DIR_OUT | USB_TYPE_VENDOR |
1578                                 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
1579
1580         if (errCode < 0) {
1581                 dev_err(&usbvision->dev->dev,
1582                         "%s: failed: error %d\n", __func__, errCode);
1583         }
1584         return errCode;
1585 }
1586
1587
1588 static void usbvision_ctrlUrb_complete(struct urb *urb)
1589 {
1590         struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1591
1592         PDEBUG(DBG_IRQ, "");
1593         usbvision->ctrlUrbBusy = 0;
1594         if (waitqueue_active(&usbvision->ctrlUrb_wq)) {
1595                 wake_up_interruptible(&usbvision->ctrlUrb_wq);
1596         }
1597 }
1598
1599
1600 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address,
1601                                                                         unsigned char *data, int len)
1602 {
1603         int errCode = 0;
1604
1605         PDEBUG(DBG_IRQ, "");
1606         if (len > 8) {
1607                 return -EFAULT;
1608         }
1609         if (usbvision->ctrlUrbBusy) {
1610                 return -EBUSY;
1611         }
1612         usbvision->ctrlUrbBusy = 1;
1613
1614         usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1615         usbvision->ctrlUrbSetup.bRequest     = USBVISION_OP_CODE;
1616         usbvision->ctrlUrbSetup.wValue       = 0;
1617         usbvision->ctrlUrbSetup.wIndex       = cpu_to_le16(address);
1618         usbvision->ctrlUrbSetup.wLength      = cpu_to_le16(len);
1619         usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev,
1620                                                         usb_sndctrlpipe(usbvision->dev, 1),
1621                                                         (unsigned char *)&usbvision->ctrlUrbSetup,
1622                                                         (void *)usbvision->ctrlUrbBuffer, len,
1623                                                         usbvision_ctrlUrb_complete,
1624                                                         (void *)usbvision);
1625
1626         memcpy(usbvision->ctrlUrbBuffer, data, len);
1627
1628         errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC);
1629         if (errCode < 0) {
1630                 // error in usb_submit_urb()
1631                 usbvision->ctrlUrbBusy = 0;
1632         }
1633         PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode);
1634         return errCode;
1635 }
1636
1637
1638 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1639 {
1640         int errCode = 0;
1641
1642         usbvision->lastIsocFrameNum = -1;
1643         usbvision->isocDataCount = 0;
1644         usbvision->isocPacketCount = 0;
1645         usbvision->isocSkipCount = 0;
1646         usbvision->comprLevel = 50;
1647         usbvision->lastComprLevel = -1;
1648         usbvision->isocUrbCount = 0;
1649         usbvision->requestIntra = 1;
1650         usbvision->isocMeasureBandwidthCount = 0;
1651
1652         return errCode;
1653 }
1654
1655 /* this function measures the used bandwidth since last call
1656  * return:    0 : no error
1657  * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize
1658  */
1659 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision)
1660 {
1661         int errCode = 0;
1662
1663         if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames
1664                 usbvision->isocMeasureBandwidthCount++;
1665                 return errCode;
1666         }
1667         if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) {
1668                 usbvision->usedBandwidth = usbvision->isocDataCount /
1669                                         (usbvision->isocPacketCount + usbvision->isocSkipCount) *
1670                                         100 / usbvision->isocPacketSize;
1671         }
1672         usbvision->isocMeasureBandwidthCount = 0;
1673         usbvision->isocDataCount = 0;
1674         usbvision->isocPacketCount = 0;
1675         usbvision->isocSkipCount = 0;
1676         return errCode;
1677 }
1678
1679 static int usbvision_adjust_compression (struct usb_usbvision *usbvision)
1680 {
1681         int errCode = 0;
1682         unsigned char buffer[6];
1683
1684         PDEBUG(DBG_IRQ, "");
1685         if ((adjustCompression) && (usbvision->usedBandwidth > 0)) {
1686                 usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2;
1687                 RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100);
1688                 if (usbvision->comprLevel != usbvision->lastComprLevel) {
1689                         int distorsion;
1690                         if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) {
1691                                 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100);      // PCM Threshold 1
1692                                 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100);       // PCM Threshold 2
1693                                 distorsion = 7 + 248 * usbvision->comprLevel / 100;
1694                                 buffer[2] = (unsigned char)(distorsion & 0xFF);                         // Average distorsion Threshold (inter)
1695                                 buffer[3] = (unsigned char)(distorsion & 0xFF);                         // Average distorsion Threshold (intra)
1696                                 distorsion = 1 + 42 * usbvision->comprLevel / 100;
1697                                 buffer[4] = (unsigned char)(distorsion & 0xFF);                         // Maximum distorsion Threshold (inter)
1698                                 buffer[5] = (unsigned char)(distorsion & 0xFF);                         // Maximum distorsion Threshold (intra)
1699                         }
1700                         else { //BRIDGE_NT1003
1701                                 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100);      // PCM threshold 1
1702                                 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100);       // PCM threshold 2
1703                                 distorsion = 2 + 253 * usbvision->comprLevel / 100;
1704                                 buffer[2] = (unsigned char)(distorsion & 0xFF);                         // distorsion threshold bit0-7
1705                                 buffer[3] = 0;  //(unsigned char)((distorsion >> 8) & 0x0F);            // distorsion threshold bit 8-11
1706                                 distorsion = 0 + 43 * usbvision->comprLevel / 100;
1707                                 buffer[4] = (unsigned char)(distorsion & 0xFF);                         // maximum distorsion bit0-7
1708                                 buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01);             // maximum distorsion bit 8
1709                         }
1710                         errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1711                         if (errCode == 0){
1712                                 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1713                                                                 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1714                                 usbvision->lastComprLevel = usbvision->comprLevel;
1715                         }
1716                 }
1717         }
1718         return errCode;
1719 }
1720
1721 static int usbvision_request_intra (struct usb_usbvision *usbvision)
1722 {
1723         int errCode = 0;
1724         unsigned char buffer[1];
1725
1726         PDEBUG(DBG_IRQ, "");
1727         usbvision->requestIntra = 1;
1728         buffer[0] = 1;
1729         usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1730         return errCode;
1731 }
1732
1733 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision)
1734 {
1735         int errCode = 0;
1736         unsigned char buffer[1];
1737
1738         PDEBUG(DBG_IRQ, "");
1739         usbvision->requestIntra = 0;
1740         buffer[0] = 0;
1741         usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1742         return errCode;
1743 }
1744
1745 /*******************************
1746  * usbvision utility functions
1747  *******************************/
1748
1749 int usbvision_power_off(struct usb_usbvision *usbvision)
1750 {
1751         int errCode = 0;
1752
1753         PDEBUG(DBG_FUNC, "");
1754
1755         errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1756         if (errCode == 1) {
1757                 usbvision->power = 0;
1758         }
1759         PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode);
1760         return errCode;
1761 }
1762
1763 /*
1764  * usbvision_set_video_format()
1765  *
1766  */
1767 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1768 {
1769         static const char proc[] = "usbvision_set_video_format";
1770         int rc;
1771         unsigned char value[2];
1772
1773         if (!USBVISION_IS_OPERATIONAL(usbvision))
1774                 return 0;
1775
1776         PDEBUG(DBG_FUNC, "isocMode %#02x", format);
1777
1778         if ((format != ISOC_MODE_YUV422)
1779             && (format != ISOC_MODE_YUV420)
1780             && (format != ISOC_MODE_COMPRESS)) {
1781                 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1782                        format);
1783                 format = ISOC_MODE_YUV420;
1784         }
1785         value[0] = 0x0A;  //TODO: See the effect of the filter
1786         value[1] = format; // Sets the VO_MODE register which follows FILT_CONT
1787         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1788                              USBVISION_OP_CODE,
1789                              USB_DIR_OUT | USB_TYPE_VENDOR |
1790                              USB_RECIP_ENDPOINT, 0,
1791                              (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1792
1793         if (rc < 0) {
1794                 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1795                        "reconnect or reload driver.\n", proc, rc);
1796         }
1797         usbvision->isocMode = format;
1798         return rc;
1799 }
1800
1801 /*
1802  * usbvision_set_output()
1803  *
1804  */
1805
1806 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1807                          int height)
1808 {
1809         int errCode = 0;
1810         int UsbWidth, UsbHeight;
1811         unsigned int frameRate=0, frameDrop=0;
1812         unsigned char value[4];
1813
1814         if (!USBVISION_IS_OPERATIONAL(usbvision)) {
1815                 return 0;
1816         }
1817
1818         if (width > MAX_USB_WIDTH) {
1819                 UsbWidth = width / 2;
1820                 usbvision->stretch_width = 2;
1821         }
1822         else {
1823                 UsbWidth = width;
1824                 usbvision->stretch_width = 1;
1825         }
1826
1827         if (height > MAX_USB_HEIGHT) {
1828                 UsbHeight = height / 2;
1829                 usbvision->stretch_height = 2;
1830         }
1831         else {
1832                 UsbHeight = height;
1833                 usbvision->stretch_height = 1;
1834         }
1835
1836         RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1837         UsbWidth &= ~(MIN_FRAME_WIDTH-1);
1838         RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1839         UsbHeight &= ~(1);
1840
1841         PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1842                                                 UsbWidth, UsbHeight, width, height,
1843                                                 usbvision->stretch_width, usbvision->stretch_height);
1844
1845         /* I'll not rewrite the same values */
1846         if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) {
1847                 value[0] = UsbWidth & 0xff;             //LSB
1848                 value[1] = (UsbWidth >> 8) & 0x03;      //MSB
1849                 value[2] = UsbHeight & 0xff;            //LSB
1850                 value[3] = (UsbHeight >> 8) & 0x03;     //MSB
1851
1852                 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1853                              USBVISION_OP_CODE,
1854                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1855                                  0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1856
1857                 if (errCode < 0) {
1858                         dev_err(&usbvision->dev->dev,
1859                                 "%s failed: error %d\n", __func__, errCode);
1860                         return errCode;
1861                 }
1862                 usbvision->curwidth = usbvision->stretch_width * UsbWidth;
1863                 usbvision->curheight = usbvision->stretch_height * UsbHeight;
1864         }
1865
1866         if (usbvision->isocMode == ISOC_MODE_YUV422) {
1867                 frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2);
1868         }
1869         else if (usbvision->isocMode == ISOC_MODE_YUV420) {
1870                 frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8);
1871         }
1872         else {
1873                 frameRate = FRAMERATE_MAX;
1874         }
1875
1876         if (usbvision->tvnormId & V4L2_STD_625_50) {
1877                 frameDrop = frameRate * 32 / 25 - 1;
1878         }
1879         else if (usbvision->tvnormId & V4L2_STD_525_60) {
1880                 frameDrop = frameRate * 32 / 30 - 1;
1881         }
1882
1883         RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX);
1884
1885         PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop);
1886
1887         frameDrop = FRAMERATE_MAX;      // We can allow the maximum here, because dropping is controlled
1888
1889         /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1890                 => frameSkip = 4;
1891                 => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1892
1893            frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1894             => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1895                 => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1896         */
1897         errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop);
1898         return errCode;
1899 }
1900
1901
1902 /*
1903  * usbvision_frames_alloc
1904  * allocate the required frames
1905  */
1906 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
1907 {
1908         int i;
1909
1910         /*needs to be page aligned cause the buffers can be mapped individually! */
1911         usbvision->max_frame_size =  PAGE_ALIGN(usbvision->curwidth *
1912                                                 usbvision->curheight *
1913                                                 usbvision->palette.bytes_per_pixel);
1914
1915         /* Try to do my best to allocate the frames the user want in the remaining memory */
1916         usbvision->num_frames = number_of_frames;
1917         while (usbvision->num_frames > 0) {
1918                 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
1919                 if((usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size))) {
1920                         break;
1921                 }
1922                 usbvision->num_frames--;
1923         }
1924
1925         spin_lock_init(&usbvision->queue_lock);
1926         init_waitqueue_head(&usbvision->wait_frame);
1927         init_waitqueue_head(&usbvision->wait_stream);
1928
1929         /* Allocate all buffers */
1930         for (i = 0; i < usbvision->num_frames; i++) {
1931                 usbvision->frame[i].index = i;
1932                 usbvision->frame[i].grabstate = FrameState_Unused;
1933                 usbvision->frame[i].data = usbvision->fbuf +
1934                         i * usbvision->max_frame_size;
1935                 /*
1936                  * Set default sizes for read operation.
1937                  */
1938                 usbvision->stretch_width = 1;
1939                 usbvision->stretch_height = 1;
1940                 usbvision->frame[i].width = usbvision->curwidth;
1941                 usbvision->frame[i].height = usbvision->curheight;
1942                 usbvision->frame[i].bytes_read = 0;
1943         }
1944         PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",usbvision->num_frames,usbvision->max_frame_size);
1945         return usbvision->num_frames;
1946 }
1947
1948 /*
1949  * usbvision_frames_free
1950  * frees memory allocated for the frames
1951  */
1952 void usbvision_frames_free(struct usb_usbvision *usbvision)
1953 {
1954         /* Have to free all that memory */
1955         PDEBUG(DBG_FUNC, "free %d frames",usbvision->num_frames);
1956
1957         if (usbvision->fbuf != NULL) {
1958                 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1959                 usbvision->fbuf = NULL;
1960
1961                 usbvision->num_frames = 0;
1962         }
1963 }
1964 /*
1965  * usbvision_empty_framequeues()
1966  * prepare queues for incoming and outgoing frames
1967  */
1968 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1969 {
1970         u32 i;
1971
1972         INIT_LIST_HEAD(&(usbvision->inqueue));
1973         INIT_LIST_HEAD(&(usbvision->outqueue));
1974
1975         for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1976                 usbvision->frame[i].grabstate = FrameState_Unused;
1977                 usbvision->frame[i].bytes_read = 0;
1978         }
1979 }
1980
1981 /*
1982  * usbvision_stream_interrupt()
1983  * stops streaming
1984  */
1985 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1986 {
1987         int ret = 0;
1988
1989         /* stop reading from the device */
1990
1991         usbvision->streaming = Stream_Interrupt;
1992         ret = wait_event_timeout(usbvision->wait_stream,
1993                                  (usbvision->streaming == Stream_Idle),
1994                                  msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1995         return ret;
1996 }
1997
1998 /*
1999  * usbvision_set_compress_params()
2000  *
2001  */
2002
2003 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
2004 {
2005         static const char proc[] = "usbvision_set_compresion_params: ";
2006         int rc;
2007         unsigned char value[6];
2008
2009         value[0] = 0x0F;    // Intra-Compression cycle
2010         value[1] = 0x01;    // Reg.45 one line per strip
2011         value[2] = 0x00;    // Reg.46 Force intra mode on all new frames
2012         value[3] = 0x00;    // Reg.47 FORCE_UP <- 0 normal operation (not force)
2013         value[4] = 0xA2;    // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode.
2014         value[5] = 0x00;    // Reg.49 DVI_YUV This has nothing to do with compression
2015
2016         //catched values for NT1004
2017         // value[0] = 0xFF; // Never apply intra mode automatically
2018         // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip
2019         // value[2] = 0x01; // Force intra mode on all new frames
2020         // value[3] = 0x00; // Strip size 400 Bytes; do not force up
2021         // value[4] = 0xA2; //
2022         if (!USBVISION_IS_OPERATIONAL(usbvision))
2023                 return 0;
2024
2025         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2026                              USBVISION_OP_CODE,
2027                              USB_DIR_OUT | USB_TYPE_VENDOR |
2028                              USB_RECIP_ENDPOINT, 0,
2029                              (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
2030
2031         if (rc < 0) {
2032                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2033                        "reconnect or reload driver.\n", proc, rc);
2034                 return rc;
2035         }
2036
2037         if (usbvision->bridgeType == BRIDGE_NT1004) {
2038                 value[0] =  20; // PCM Threshold 1
2039                 value[1] =  12; // PCM Threshold 2
2040                 value[2] = 255; // Distorsion Threshold inter
2041                 value[3] = 255; // Distorsion Threshold intra
2042                 value[4] =  43; // Max Distorsion inter
2043                 value[5] =  43; // Max Distorsion intra
2044         }
2045         else {
2046                 value[0] =  20; // PCM Threshold 1
2047                 value[1] =  12; // PCM Threshold 2
2048                 value[2] = 255; // Distorsion Threshold d7-d0
2049                 value[3] =   0; // Distorsion Threshold d11-d8
2050                 value[4] =  43; // Max Distorsion d7-d0
2051                 value[5] =   0; // Max Distorsion d8
2052         }
2053
2054         if (!USBVISION_IS_OPERATIONAL(usbvision))
2055                 return 0;
2056
2057         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2058                              USBVISION_OP_CODE,
2059                              USB_DIR_OUT | USB_TYPE_VENDOR |
2060                              USB_RECIP_ENDPOINT, 0,
2061                              (__u16) USBVISION_PCM_THR1, value, 6, HZ);
2062
2063         if (rc < 0) {
2064                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2065                        "reconnect or reload driver.\n", proc, rc);
2066                 return rc;
2067         }
2068
2069
2070         return rc;
2071 }
2072
2073
2074 /*
2075  * usbvision_set_input()
2076  *
2077  * Set the input (saa711x, ...) size x y and other misc input params
2078  * I've no idea if this parameters are right
2079  *
2080  */
2081 int usbvision_set_input(struct usb_usbvision *usbvision)
2082 {
2083         static const char proc[] = "usbvision_set_input: ";
2084         int rc;
2085         unsigned char value[8];
2086         unsigned char dvi_yuv_value;
2087
2088         if (!USBVISION_IS_OPERATIONAL(usbvision))
2089                 return 0;
2090
2091         /* Set input format expected from decoder*/
2092         if (usbvision_device_data[usbvision->DevModel].Vin_Reg1_override) {
2093                 value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1;
2094         } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2095                 /* SAA7113 uses 8 bit output */
2096                 value[0] = USBVISION_8_422_SYNC;
2097         } else {
2098                 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
2099                  * as that is how saa7111 is configured */
2100                 value[0] = USBVISION_16_422_SYNC;
2101                 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
2102         }
2103
2104         rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
2105         if (rc < 0) {
2106                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2107                        "reconnect or reload driver.\n", proc, rc);
2108                 return rc;
2109         }
2110
2111
2112         if (usbvision->tvnormId & V4L2_STD_PAL) {
2113                 value[0] = 0xC0;
2114                 value[1] = 0x02;        //0x02C0 -> 704 Input video line length
2115                 value[2] = 0x20;
2116                 value[3] = 0x01;        //0x0120 -> 288 Input video n. of lines
2117                 value[4] = 0x60;
2118                 value[5] = 0x00;        //0x0060 -> 96 Input video h offset
2119                 value[6] = 0x16;
2120                 value[7] = 0x00;        //0x0016 -> 22 Input video v offset
2121         } else if (usbvision->tvnormId & V4L2_STD_SECAM) {
2122                 value[0] = 0xC0;
2123                 value[1] = 0x02;        //0x02C0 -> 704 Input video line length
2124                 value[2] = 0x20;
2125                 value[3] = 0x01;        //0x0120 -> 288 Input video n. of lines
2126                 value[4] = 0x01;
2127                 value[5] = 0x00;        //0x0001 -> 01 Input video h offset
2128                 value[6] = 0x01;
2129                 value[7] = 0x00;        //0x0001 -> 01 Input video v offset
2130         } else {        /* V4L2_STD_NTSC */
2131                 value[0] = 0xD0;
2132                 value[1] = 0x02;        //0x02D0 -> 720 Input video line length
2133                 value[2] = 0xF0;
2134                 value[3] = 0x00;        //0x00F0 -> 240 Input video number of lines
2135                 value[4] = 0x50;
2136                 value[5] = 0x00;        //0x0050 -> 80 Input video h offset
2137                 value[6] = 0x10;
2138                 value[7] = 0x00;        //0x0010 -> 16 Input video v offset
2139         }
2140
2141         if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) {
2142                 value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff;
2143                 value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8;
2144         }
2145
2146         if (adjust_X_Offset != -1) {
2147                 value[4] = adjust_X_Offset & 0xff;
2148                 value[5] = (adjust_X_Offset & 0x0300) >> 8;
2149         }
2150
2151         if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) {
2152                 value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff;
2153                 value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8;
2154         }
2155
2156         if (adjust_Y_Offset != -1) {
2157                 value[6] = adjust_Y_Offset & 0xff;
2158                 value[7] = (adjust_Y_Offset & 0x0300) >> 8;
2159         }
2160
2161         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2162                              USBVISION_OP_CODE, /* USBVISION specific code */
2163                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2164                              (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2165         if (rc < 0) {
2166                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2167                        "reconnect or reload driver.\n", proc, rc);
2168                 return rc;
2169         }
2170
2171
2172         dvi_yuv_value = 0x00;   /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2173
2174         if(usbvision_device_data[usbvision->DevModel].Dvi_yuv_override){
2175                 dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv;
2176         }
2177         else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2178         /* This changes as the fine sync control changes. Further investigation necessary */
2179                 dvi_yuv_value = 0x06;
2180         }
2181
2182         return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value));
2183 }
2184
2185
2186 /*
2187  * usbvision_set_dram_settings()
2188  *
2189  * Set the buffer address needed by the usbvision dram to operate
2190  * This values has been taken with usbsnoop.
2191  *
2192  */
2193
2194 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2195 {
2196         int rc;
2197         unsigned char value[8];
2198
2199         if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2200                 value[0] = 0x42;
2201                 value[1] = 0x71;
2202                 value[2] = 0xff;
2203                 value[3] = 0x00;
2204                 value[4] = 0x98;
2205                 value[5] = 0xe0;
2206                 value[6] = 0x71;
2207                 value[7] = 0xff;
2208                 // UR:  0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte)
2209                 // FDL: 0x00000-0x0E099 =  57498 Words
2210                 // VDW: 0x0E3FF-0x3FFFF
2211         }
2212         else {
2213                 value[0] = 0x42;
2214                 value[1] = 0x00;
2215                 value[2] = 0xff;
2216                 value[3] = 0x00;
2217                 value[4] = 0x00;
2218                 value[5] = 0x00;
2219                 value[6] = 0x00;
2220                 value[7] = 0xff;
2221         }
2222         /* These are the values of the address of the video buffer,
2223          * they have to be loaded into the USBVISION_DRM_PRM1-8
2224          *
2225          * Start address of video output buffer for read:       drm_prm1-2 -> 0x00000
2226          * End address of video output buffer for read:         drm_prm1-3 -> 0x1ffff
2227          * Start address of video frame delay buffer:           drm_prm1-4 -> 0x20000
2228          *    Only used in compressed mode
2229          * End address of video frame delay buffer:             drm_prm1-5-6 -> 0x3ffff
2230          *    Only used in compressed mode
2231          * Start address of video output buffer for write:      drm_prm1-7 -> 0x00000
2232          * End address of video output buffer for write:        drm_prm1-8 -> 0x1ffff
2233          */
2234
2235         if (!USBVISION_IS_OPERATIONAL(usbvision))
2236                 return 0;
2237
2238         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2239                              USBVISION_OP_CODE, /* USBVISION specific code */
2240                              USB_DIR_OUT | USB_TYPE_VENDOR |
2241                              USB_RECIP_ENDPOINT, 0,
2242                              (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2243
2244         if (rc < 0) {
2245                 dev_err(&usbvision->dev->dev, "%sERROR=%d\n", __func__, rc);
2246                 return rc;
2247         }
2248
2249         /* Restart the video buffer logic */
2250         if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2251                                    USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0)
2252                 return rc;
2253         rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2254
2255         return rc;
2256 }
2257
2258 /*
2259  * ()
2260  *
2261  * Power on the device, enables suspend-resume logic
2262  * &  reset the isoc End-Point
2263  *
2264  */
2265
2266 int usbvision_power_on(struct usb_usbvision *usbvision)
2267 {
2268         int errCode = 0;
2269
2270         PDEBUG(DBG_FUNC, "");
2271
2272         usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2273         usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2274                          USBVISION_SSPND_EN | USBVISION_RES2);
2275
2276         usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2277                          USBVISION_SSPND_EN | USBVISION_PWR_VID);
2278         errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2279                                                 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2280         if (errCode == 1) {
2281                 usbvision->power = 1;
2282         }
2283         PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode);
2284         return errCode;
2285 }
2286
2287
2288 /*
2289  * usbvision timer stuff
2290  */
2291
2292 // to call usbvision_power_off from task queue
2293 static void call_usbvision_power_off(struct work_struct *work)
2294 {
2295         struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork);
2296
2297         PDEBUG(DBG_FUNC, "");
2298         if(mutex_lock_interruptible(&usbvision->lock)) {
2299                 return;
2300         }
2301
2302
2303         if(usbvision->user == 0) {
2304                 usbvision_i2c_unregister(usbvision);
2305
2306                 usbvision_power_off(usbvision);
2307                 usbvision->initialized = 0;
2308         }
2309         mutex_unlock(&usbvision->lock);
2310 }
2311
2312 static void usbvision_powerOffTimer(unsigned long data)
2313 {
2314         struct usb_usbvision *usbvision = (void *) data;
2315
2316         PDEBUG(DBG_FUNC, "");
2317         del_timer(&usbvision->powerOffTimer);
2318         INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off);
2319         (void) schedule_work(&usbvision->powerOffWork);
2320 }
2321
2322 void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision)
2323 {
2324         init_timer(&usbvision->powerOffTimer);
2325         usbvision->powerOffTimer.data = (long) usbvision;
2326         usbvision->powerOffTimer.function = usbvision_powerOffTimer;
2327 }
2328
2329 void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision)
2330 {
2331         mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME);
2332 }
2333
2334 void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision)
2335 {
2336         if (timer_pending(&usbvision->powerOffTimer)) {
2337                 del_timer(&usbvision->powerOffTimer);
2338         }
2339 }
2340
2341 /*
2342  * usbvision_begin_streaming()
2343  * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2344  * idea about the rest
2345  */
2346 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2347 {
2348         int errCode = 0;
2349
2350         if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2351                 usbvision_init_compression(usbvision);
2352         }
2353         errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID |
2354                                                                                 usbvision->Vin_Reg2_Preset);
2355         return errCode;
2356 }
2357
2358 /*
2359  * usbvision_restart_isoc()
2360  * Not sure yet if touching here PWR_REG make loose the config
2361  */
2362
2363 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2364 {
2365         int ret;
2366
2367         if (
2368             (ret =
2369              usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2370                               USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0)
2371                 return ret;
2372         if (
2373             (ret =
2374              usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2375                               USBVISION_SSPND_EN | USBVISION_PWR_VID |
2376                               USBVISION_RES2)) < 0)
2377                 return ret;
2378         if (
2379             (ret =
2380              usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2381                               USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2382                                   usbvision->Vin_Reg2_Preset)) < 0) return ret;
2383
2384         /* TODO: schedule timeout */
2385         while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1);
2386
2387         return 0;
2388 }
2389
2390 int usbvision_audio_off(struct usb_usbvision *usbvision)
2391 {
2392         if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2393                 printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n");
2394                 return -1;
2395         }
2396         usbvision->AudioMute = 0;
2397         usbvision->AudioChannel = USBVISION_AUDIO_MUTE;
2398         return 0;
2399 }
2400
2401 int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel)
2402 {
2403         if (!usbvision->AudioMute) {
2404                 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) {
2405                         printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2406                         return -1;
2407                 }
2408         }
2409         usbvision->AudioChannel = AudioChannel;
2410         return 0;
2411 }
2412
2413 int usbvision_setup(struct usb_usbvision *usbvision,int format)
2414 {
2415         usbvision_set_video_format(usbvision, format);
2416         usbvision_set_dram_settings(usbvision);
2417         usbvision_set_compress_params(usbvision);
2418         usbvision_set_input(usbvision);
2419         usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2420         usbvision_restart_isoc(usbvision);
2421
2422         /* cosas del PCM */
2423         return USBVISION_IS_OPERATIONAL(usbvision);
2424 }
2425
2426 int usbvision_set_alternate(struct usb_usbvision *dev)
2427 {
2428         int errCode, prev_alt = dev->ifaceAlt;
2429         int i;
2430
2431         dev->ifaceAlt=0;
2432         for(i=0;i< dev->num_alt; i++)
2433                 if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->ifaceAlt])
2434                         dev->ifaceAlt=i;
2435
2436         if (dev->ifaceAlt != prev_alt) {
2437                 dev->isocPacketSize = dev->alt_max_pkt_size[dev->ifaceAlt];
2438                 PDEBUG(DBG_FUNC,"setting alternate %d with wMaxPacketSize=%u", dev->ifaceAlt,dev->isocPacketSize);
2439                 errCode = usb_set_interface(dev->dev, dev->iface, dev->ifaceAlt);
2440                 if (errCode < 0) {
2441                         dev_err(&dev->dev->dev,
2442                                 "cannot change alternate number to %d (error=%i)\n",
2443                                         dev->ifaceAlt, errCode);
2444                         return errCode;
2445                 }
2446         }
2447
2448         PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isocPacketSize);
2449
2450         return 0;
2451 }
2452
2453 /*
2454  * usbvision_init_isoc()
2455  *
2456  */
2457 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2458 {
2459         struct usb_device *dev = usbvision->dev;
2460         int bufIdx, errCode, regValue;
2461         int sb_size;
2462
2463         if (!USBVISION_IS_OPERATIONAL(usbvision))
2464                 return -EFAULT;
2465
2466         usbvision->curFrame = NULL;
2467         scratch_reset(usbvision);
2468
2469         /* Alternate interface 1 is is the biggest frame size */
2470         errCode = usbvision_set_alternate(usbvision);
2471         if (errCode < 0) {
2472                 usbvision->last_error = errCode;
2473                 return -EBUSY;
2474         }
2475         sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
2476
2477         regValue = (16 - usbvision_read_reg(usbvision,
2478                                             USBVISION_ALTER_REG)) & 0x0F;
2479
2480         usbvision->usb_bandwidth = regValue >> 1;
2481         PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2482                usbvision->usb_bandwidth);
2483
2484
2485
2486         /* We double buffer the Iso lists */
2487
2488         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2489                 int j, k;
2490                 struct urb *urb;
2491
2492                 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2493                 if (urb == NULL) {
2494                         dev_err(&usbvision->dev->dev,
2495                                 "%s: usb_alloc_urb() failed\n", __func__);
2496                         return -ENOMEM;
2497                 }
2498                 usbvision->sbuf[bufIdx].urb = urb;
2499                 usbvision->sbuf[bufIdx].data =
2500                         usb_buffer_alloc(usbvision->dev,
2501                                          sb_size,
2502                                          GFP_KERNEL,
2503                                          &urb->transfer_dma);
2504                 urb->dev = dev;
2505                 urb->context = usbvision;
2506                 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2507                 urb->transfer_flags = URB_ISO_ASAP;
2508                 urb->interval = 1;
2509                 urb->transfer_buffer = usbvision->sbuf[bufIdx].data;
2510                 urb->complete = usbvision_isocIrq;
2511                 urb->number_of_packets = USBVISION_URB_FRAMES;
2512                 urb->transfer_buffer_length =
2513                     usbvision->isocPacketSize * USBVISION_URB_FRAMES;
2514                 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2515                      k += usbvision->isocPacketSize) {
2516                         urb->iso_frame_desc[j].offset = k;
2517                         urb->iso_frame_desc[j].length =
2518                                 usbvision->isocPacketSize;
2519                 }
2520         }
2521
2522         /* Submit all URBs */
2523         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2524                         errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb,
2525                                                  GFP_KERNEL);
2526                 if (errCode) {
2527                         dev_err(&usbvision->dev->dev,
2528                                 "%s: usb_submit_urb(%d) failed: error %d\n",
2529                                         __func__, bufIdx, errCode);
2530                 }
2531         }
2532
2533         usbvision->streaming = Stream_Idle;
2534         PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x",
2535                __func__,
2536                usbvision->video_endp);
2537         return 0;
2538 }
2539
2540 /*
2541  * usbvision_stop_isoc()
2542  *
2543  * This procedure stops streaming and deallocates URBs. Then it
2544  * activates zero-bandwidth alt. setting of the video interface.
2545  *
2546  */
2547 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2548 {
2549         int bufIdx, errCode, regValue;
2550         int sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
2551
2552         if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL))
2553                 return;
2554
2555         /* Unschedule all of the iso td's */
2556         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2557                 usb_kill_urb(usbvision->sbuf[bufIdx].urb);
2558                 if (usbvision->sbuf[bufIdx].data){
2559                         usb_buffer_free(usbvision->dev,
2560                                         sb_size,
2561                                         usbvision->sbuf[bufIdx].data,
2562                                         usbvision->sbuf[bufIdx].urb->transfer_dma);
2563                 }
2564                 usb_free_urb(usbvision->sbuf[bufIdx].urb);
2565                 usbvision->sbuf[bufIdx].urb = NULL;
2566         }
2567
2568         PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __func__);
2569         usbvision->streaming = Stream_Off;
2570
2571         if (!usbvision->remove_pending) {
2572
2573                 /* Set packet size to 0 */
2574                 usbvision->ifaceAlt=0;
2575                 errCode = usb_set_interface(usbvision->dev, usbvision->iface,
2576                                             usbvision->ifaceAlt);
2577                 if (errCode < 0) {
2578                         dev_err(&usbvision->dev->dev,
2579                                 "%s: usb_set_interface() failed: error %d\n",
2580                                         __func__, errCode);
2581                         usbvision->last_error = errCode;
2582                 }
2583                 regValue = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2584                 usbvision->isocPacketSize =
2585                         (regValue == 0) ? 0 : (regValue * 64) - 1;
2586                 PDEBUG(DBG_ISOC, "ISO Packet Length:%d",
2587                        usbvision->isocPacketSize);
2588
2589                 usbvision->usb_bandwidth = regValue >> 1;
2590                 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2591                        usbvision->usb_bandwidth);
2592         }
2593 }
2594
2595 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2596 {
2597         /* inputs #0 and #3 are constant for every SAA711x. */
2598         /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */
2599         int mode[4]= {SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3};
2600         int audio[]= {1, 0, 0, 0};
2601         struct v4l2_routing route;
2602         //channel 0 is TV with audiochannel 1 (tuner mono)
2603         //channel 1 is Composite with audio channel 0 (line in)
2604         //channel 2 is S-Video with audio channel 0 (line in)
2605         //channel 3 is additional video inputs to the device with audio channel 0 (line in)
2606
2607         RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2608         usbvision->ctl_input = channel;
2609
2610         // set the new channel
2611         // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video
2612         // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red
2613
2614         switch (usbvision_device_data[usbvision->DevModel].Codec) {
2615                 case CODEC_SAA7113:
2616                         mode[1] = SAA7115_COMPOSITE2;
2617                         if (SwitchSVideoInput) {
2618                                 /* To handle problems with S-Video Input for
2619                                  * some devices.  Use SwitchSVideoInput
2620                                  * parameter when loading the module.*/
2621                                 mode[2] = SAA7115_COMPOSITE1;
2622                         }
2623                         else {
2624                                 mode[2] = SAA7115_SVIDEO1;
2625                         }
2626                         break;
2627                 case CODEC_SAA7111:
2628                 default:
2629                         /* modes for saa7111 */
2630                         mode[1] = SAA7115_COMPOSITE1;
2631                         mode[2] = SAA7115_SVIDEO1;
2632                         break;
2633         }
2634         route.input = mode[channel];
2635         route.output = 0;
2636         call_all(usbvision, video, s_routing, &route);
2637         usbvision_set_audio(usbvision, audio[channel]);
2638         return 0;
2639 }
2640
2641 /*
2642  * Overrides for Emacs so that we follow Linus's tabbing style.
2643  * ---------------------------------------------------------------------------
2644  * Local variables:
2645  * c-basic-offset: 8
2646  * End:
2647  */