drivers/media/usb/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
  22 #include <linux/kernel.h>
  23 #include <linux/list.h>
  24 #include <linux/timer.h>
  25 #include <linux/gfp.h>
  26 #include <linux/mm.h>
  27 #include <linux/highmem.h>
  28 #include <linux/vmalloc.h>
  29 #include <linux/module.h>
  30 #include <linux/init.h>
  31 #include <linux/spinlock.h>
  32 #include <linux/io.h>
  33 #include <linux/videodev2.h>
  34 #include <linux/i2c.h>
  35
  36 #include <media/i2c/saa7115.h>
  37 #include <media/v4l2-common.h>
  38 #include <media/tuner.h>
  39
  40 #include <linux/workqueue.h>
  41
  42 #include "usbvision.h"
  43
  44 static unsigned int core_debug;
  45 module_param(core_debug, int, 0644);
  46 MODULE_PARM_DESC(core_debug, "enable debug messages [core]");
  47
  48 static int adjust_compression = 1;      /* Set the compression to be adaptive */
  49 module_param(adjust_compression, int, 0444);
  50 MODULE_PARM_DESC(adjust_compression, " Set the ADPCM compression for the device.  Default: 1 (On)");
  51
  52 /* To help people with Black and White output with using s-video input.
  53  * Some cables and input device are wired differently. */
  54 static int switch_svideo_input;
  55 module_param(switch_svideo_input, int, 0444);
  56 MODULE_PARM_DESC(switch_svideo_input, " Set the S-Video input.  Some cables and input device are wired differently. Default: 0 (Off)");
  57
  58 static unsigned int adjust_x_offset = -1;
  59 module_param(adjust_x_offset, int, 0644);
  60 MODULE_PARM_DESC(adjust_x_offset, "adjust X offset display [core]");
  61
  62 static unsigned int adjust_y_offset = -1;
  63 module_param(adjust_y_offset, int, 0644);
  64 MODULE_PARM_DESC(adjust_y_offset, "adjust Y offset display [core]");
  65
  66
  67 #define ENABLE_HEXDUMP  0       /* Enable if you need it */
  68
  69
  70 #ifdef USBVISION_DEBUG
  71         #define PDEBUG(level, fmt, args...) { \
  72                 if (core_debug & (level)) \
  73                         printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \
  74                                 __func__, __LINE__ , ## args); \
  75         }
  76 #else
  77         #define PDEBUG(level, fmt, args...) do {} while (0)
  78 #endif
  79
  80 #define DBG_HEADER      (1 << 0)
  81 #define DBG_IRQ         (1 << 1)
  82 #define DBG_ISOC        (1 << 2)
  83 #define DBG_PARSE       (1 << 3)
  84 #define DBG_SCRATCH     (1 << 4)
  85 #define DBG_FUNC        (1 << 5)
  86
  87 /* The value of 'scratch_buf_size' affects quality of the picture
  88  * in many ways. Shorter buffers may cause loss of data when client
  89  * is too slow. Larger buffers are memory-consuming and take longer
  90  * to work with. This setting can be adjusted, but the default value
  91  * should be OK for most desktop users.
  92  */
  93 #define DEFAULT_SCRATCH_BUF_SIZE        (0x20000)               /* 128kB memory scratch buffer */
  94 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
  95
  96 /* Function prototypes */
  97 static int usbvision_request_intra(struct usb_usbvision *usbvision);
  98 static int usbvision_unrequest_intra(struct usb_usbvision *usbvision);
  99 static int usbvision_adjust_compression(struct usb_usbvision *usbvision);
 100 static int usbvision_measure_bandwidth(struct usb_usbvision *usbvision);
 101
 102 /*******************************/
 103 /* Memory management functions */
 104 /*******************************/
 105
 106 /*
 107  * Here we want the physical address of the memory.
 108  * This is used when initializing the contents of the area.
 109  */
 110
 111 static void *usbvision_rvmalloc(unsigned long size)
 112 {
 113         void *mem;
 114         unsigned long adr;
 115
 116         size = PAGE_ALIGN(size);
 117         mem = vmalloc_32(size);
 118         if (!mem)
 119                 return NULL;
 120
 121         memset(mem, 0, size); /* Clear the ram out, no junk to the user */
 122         adr = (unsigned long) mem;
 123         while (size > 0) {
 124                 SetPageReserved(vmalloc_to_page((void *)adr));
 125                 adr += PAGE_SIZE;
 126                 size -= PAGE_SIZE;
 127         }
 128
 129         return mem;
 130 }
 131
 132 static void usbvision_rvfree(void *mem, unsigned long size)
 133 {
 134         unsigned long adr;
 135
 136         if (!mem)
 137                 return;
 138
 139         size = PAGE_ALIGN(size);
 140
 141         adr = (unsigned long) mem;
 142         while ((long) size > 0) {
 143                 ClearPageReserved(vmalloc_to_page((void *)adr));
 144                 adr += PAGE_SIZE;
 145                 size -= PAGE_SIZE;
 146         }
 147
 148         vfree(mem);
 149 }
 150
 151
 152 #if ENABLE_HEXDUMP
 153 static void usbvision_hexdump(const unsigned char *data, int len)
 154 {
 155         char tmp[80];
 156         int i, k;
 157
 158         for (i = k = 0; len > 0; i++, len--) {
 159                 if (i > 0 && (i % 16 == 0)) {
 160                         printk("%s\n", tmp);
 161                         k = 0;
 162                 }
 163                 k += sprintf(&tmp[k], "%02x ", data[i]);
 164         }
 165         if (k > 0)
 166                 printk(KERN_CONT "%s\n", tmp);
 167 }
 168 #endif
 169
 170 /********************************
 171  * scratch ring buffer handling
 172  ********************************/
 173 static int scratch_len(struct usb_usbvision *usbvision)    /* This returns the amount of data actually in the buffer */
 174 {
 175         int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
 176
 177         if (len < 0)
 178                 len += scratch_buf_size;
 179         PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
 180
 181         return len;
 182 }
 183
 184
 185 /* This returns the free space left in the buffer */
 186 static int scratch_free(struct usb_usbvision *usbvision)
 187 {
 188         int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
 189         if (free <= 0)
 190                 free += scratch_buf_size;
 191         if (free) {
 192                 free -= 1;                                                      /* at least one byte in the buffer must */
 193                                                                                 /* left blank, otherwise there is no chance to differ between full and empty */
 194         }
 195         PDEBUG(DBG_SCRATCH, "return %d\n", free);
 196
 197         return free;
 198 }
 199
 200
 201 /* This puts data into the buffer */
 202 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
 203                        int len)
 204 {
 205         int len_part;
 206
 207         if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
 208                 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
 209                 usbvision->scratch_write_ptr += len;
 210         } else {
 211                 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
 212                 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
 213                 if (len == len_part) {
 214                         usbvision->scratch_write_ptr = 0;                       /* just set write_ptr to zero */
 215                 } else {
 216                         memcpy(usbvision->scratch, data + len_part, len - len_part);
 217                         usbvision->scratch_write_ptr = len - len_part;
 218                 }
 219         }
 220
 221         PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
 222
 223         return len;
 224 }
 225
 226 /* This marks the write_ptr as position of new frame header */
 227 static void scratch_mark_header(struct usb_usbvision *usbvision)
 228 {
 229         PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
 230
 231         usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
 232                                 usbvision->scratch_write_ptr;
 233         usbvision->scratch_headermarker_write_ptr += 1;
 234         usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
 235 }
 236
 237 /* This gets data from the buffer at the given "ptr" position */
 238 static int scratch_get_extra(struct usb_usbvision *usbvision,
 239                              unsigned char *data, int *ptr, int len)
 240 {
 241         int len_part;
 242
 243         if (*ptr + len < scratch_buf_size) {
 244                 memcpy(data, usbvision->scratch + *ptr, len);
 245                 *ptr += len;
 246         } else {
 247                 len_part = scratch_buf_size - *ptr;
 248                 memcpy(data, usbvision->scratch + *ptr, len_part);
 249                 if (len == len_part) {
 250                         *ptr = 0;                                                       /* just set the y_ptr to zero */
 251                 } else {
 252                         memcpy(data + len_part, usbvision->scratch, len - len_part);
 253                         *ptr = len - len_part;
 254                 }
 255         }
 256
 257         PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
 258
 259         return len;
 260 }
 261
 262
 263 /* This sets the scratch extra read pointer */
 264 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
 265                                   int len)
 266 {
 267         *ptr = (usbvision->scratch_read_ptr + len) % scratch_buf_size;
 268
 269         PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
 270 }
 271
 272
 273 /* This increments the scratch extra read pointer */
 274 static void scratch_inc_extra_ptr(int *ptr, int len)
 275 {
 276         *ptr = (*ptr + len) % scratch_buf_size;
 277
 278         PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
 279 }
 280
 281
 282 /* This gets data from the buffer */
 283 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
 284                        int len)
 285 {
 286         int len_part;
 287
 288         if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
 289                 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
 290                 usbvision->scratch_read_ptr += len;
 291         } else {
 292                 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
 293                 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
 294                 if (len == len_part) {
 295                         usbvision->scratch_read_ptr = 0;                                /* just set the read_ptr to zero */
 296                 } else {
 297                         memcpy(data + len_part, usbvision->scratch, len - len_part);
 298                         usbvision->scratch_read_ptr = len - len_part;
 299                 }
 300         }
 301
 302         PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
 303
 304         return len;
 305 }
 306
 307
 308 /* This sets read pointer to next header and returns it */
 309 static int scratch_get_header(struct usb_usbvision *usbvision,
 310                               struct usbvision_frame_header *header)
 311 {
 312         int err_code = 0;
 313
 314         PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
 315
 316         while (usbvision->scratch_headermarker_write_ptr -
 317                 usbvision->scratch_headermarker_read_ptr != 0) {
 318                 usbvision->scratch_read_ptr =
 319                         usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
 320                 usbvision->scratch_headermarker_read_ptr += 1;
 321                 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
 322                 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
 323                 if ((header->magic_1 == USBVISION_MAGIC_1)
 324                          && (header->magic_2 == USBVISION_MAGIC_2)
 325                          && (header->header_length == USBVISION_HEADER_LENGTH)) {
 326                         err_code = USBVISION_HEADER_LENGTH;
 327                         header->frame_width  = header->frame_width_lo  + (header->frame_width_hi << 8);
 328                         header->frame_height = header->frame_height_lo + (header->frame_height_hi << 8);
 329                         break;
 330                 }
 331         }
 332
 333         return err_code;
 334 }
 335
 336
 337 /* This removes len bytes of old data from the buffer */
 338 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
 339 {
 340         usbvision->scratch_read_ptr += len;
 341         usbvision->scratch_read_ptr %= scratch_buf_size;
 342         PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
 343 }
 344
 345
 346 /* This resets the buffer - kills all data in it too */
 347 static void scratch_reset(struct usb_usbvision *usbvision)
 348 {
 349         PDEBUG(DBG_SCRATCH, "\n");
 350
 351         usbvision->scratch_read_ptr = 0;
 352         usbvision->scratch_write_ptr = 0;
 353         usbvision->scratch_headermarker_read_ptr = 0;
 354         usbvision->scratch_headermarker_write_ptr = 0;
 355         usbvision->isocstate = isoc_state_no_frame;
 356 }
 357
 358 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
 359 {
 360         usbvision->scratch = vmalloc_32(scratch_buf_size);
 361         scratch_reset(usbvision);
 362         if (usbvision->scratch == NULL) {
 363                 dev_err(&usbvision->dev->dev,
 364                         "%s: unable to allocate %d bytes for scratch\n",
 365                                 __func__, scratch_buf_size);
 366                 return -ENOMEM;
 367         }
 368         return 0;
 369 }
 370
 371 void usbvision_scratch_free(struct usb_usbvision *usbvision)
 372 {
 373         vfree(usbvision->scratch);
 374         usbvision->scratch = NULL;
 375 }
 376
 377 /*
 378  * usbvision_decompress_alloc()
 379  *
 380  * allocates intermediate buffer for decompression
 381  */
 382 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
 383 {
 384         int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
 385
 386         usbvision->intra_frame_buffer = vmalloc_32(IFB_size);
 387         if (usbvision->intra_frame_buffer == NULL) {
 388                 dev_err(&usbvision->dev->dev,
 389                         "%s: unable to allocate %d for compr. frame buffer\n",
 390                                 __func__, IFB_size);
 391                 return -ENOMEM;
 392         }
 393         return 0;
 394 }
 395
 396 /*
 397  * usbvision_decompress_free()
 398  *
 399  * frees intermediate buffer for decompression
 400  */
 401 void usbvision_decompress_free(struct usb_usbvision *usbvision)
 402 {
 403         vfree(usbvision->intra_frame_buffer);
 404         usbvision->intra_frame_buffer = NULL;
 405
 406 }
 407
 408 /************************************************************
 409  * Here comes the data parsing stuff that is run as interrupt
 410  ************************************************************/
 411 /*
 412  * usbvision_find_header()
 413  *
 414  * Locate one of supported header markers in the scratch buffer.
 415  */
 416 static enum parse_state usbvision_find_header(struct usb_usbvision *usbvision)
 417 {
 418         struct usbvision_frame *frame;
 419         int found_header = 0;
 420
 421         frame = usbvision->cur_frame;
 422
 423         while (scratch_get_header(usbvision, &frame->isoc_header) == USBVISION_HEADER_LENGTH) {
 424                 /* found header in scratch */
 425                 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
 426                                 frame->isoc_header.magic_2,
 427                                 frame->isoc_header.magic_1,
 428                                 frame->isoc_header.header_length,
 429                                 frame->isoc_header.frame_num,
 430                                 frame->isoc_header.frame_phase,
 431                                 frame->isoc_header.frame_latency,
 432                                 frame->isoc_header.data_format,
 433                                 frame->isoc_header.format_param,
 434                                 frame->isoc_header.frame_width,
 435                                 frame->isoc_header.frame_height);
 436
 437                 if (usbvision->request_intra) {
 438                         if (frame->isoc_header.format_param & 0x80) {
 439                                 found_header = 1;
 440                                 usbvision->last_isoc_frame_num = -1; /* do not check for lost frames this time */
 441                                 usbvision_unrequest_intra(usbvision);
 442                                 break;
 443                         }
 444                 } else {
 445                         found_header = 1;
 446                         break;
 447                 }
 448         }
 449
 450         if (found_header) {
 451                 frame->frmwidth = frame->isoc_header.frame_width * usbvision->stretch_width;
 452                 frame->frmheight = frame->isoc_header.frame_height * usbvision->stretch_height;
 453                 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth) >> 3;
 454         } else { /* no header found */
 455                 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
 456                 scratch_reset(usbvision);
 457                 return parse_state_end_parse;
 458         }
 459
 460         /* found header */
 461         if (frame->isoc_header.data_format == ISOC_MODE_COMPRESS) {
 462                 /* check isoc_header.frame_num for lost frames */
 463                 if (usbvision->last_isoc_frame_num >= 0) {
 464                         if (((usbvision->last_isoc_frame_num + 1) % 32) != frame->isoc_header.frame_num) {
 465                                 /* unexpected frame drop: need to request new intra frame */
 466                                 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isoc_header.frame_num);
 467                                 usbvision_request_intra(usbvision);
 468                                 return parse_state_next_frame;
 469                         }
 470                 }
 471                 usbvision->last_isoc_frame_num = frame->isoc_header.frame_num;
 472         }
 473         usbvision->header_count++;
 474         frame->scanstate = scan_state_lines;
 475         frame->curline = 0;
 476
 477         return parse_state_continue;
 478 }
 479
 480 static enum parse_state usbvision_parse_lines_422(struct usb_usbvision *usbvision,
 481                                            long *pcopylen)
 482 {
 483         volatile struct usbvision_frame *frame;
 484         unsigned char *f;
 485         int len;
 486         int i;
 487         unsigned char yuyv[4] = { 180, 128, 10, 128 }; /* YUV components */
 488         unsigned char rv, gv, bv;       /* RGB components */
 489         int clipmask_index, bytes_per_pixel;
 490         int stretch_bytes, clipmask_add;
 491
 492         frame  = usbvision->cur_frame;
 493         f = frame->data + (frame->v4l2_linesize * frame->curline);
 494
 495         /* Make sure there's enough data for the entire line */
 496         len = (frame->isoc_header.frame_width * 2) + 5;
 497         if (scratch_len(usbvision) < len) {
 498                 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
 499                 return parse_state_out;
 500         }
 501
 502         if ((frame->curline + 1) >= frame->frmheight)
 503                 return parse_state_next_frame;
 504
 505         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
 506         stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
 507         clipmask_index = frame->curline * MAX_FRAME_WIDTH;
 508         clipmask_add = usbvision->stretch_width;
 509
 510         for (i = 0; i < frame->frmwidth; i += (2 * usbvision->stretch_width)) {
 511                 scratch_get(usbvision, &yuyv[0], 4);
 512
 513                 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 514                         *f++ = yuyv[0]; /* Y */
 515                         *f++ = yuyv[3]; /* U */
 516                 } else {
 517                         YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
 518                         switch (frame->v4l2_format.format) {
 519                         case V4L2_PIX_FMT_RGB565:
 520                                 *f++ = (0x1F & rv) |
 521                                         (0xE0 & (gv << 5));
 522                                 *f++ = (0x07 & (gv >> 3)) |
 523                                         (0xF8 &  bv);
 524                                 break;
 525                         case V4L2_PIX_FMT_RGB24:
 526                                 *f++ = rv;
 527                                 *f++ = gv;
 528                                 *f++ = bv;
 529                                 break;
 530                         case V4L2_PIX_FMT_RGB32:
 531                                 *f++ = rv;
 532                                 *f++ = gv;
 533                                 *f++ = bv;
 534                                 f++;
 535                                 break;
 536                         case V4L2_PIX_FMT_RGB555:
 537                                 *f++ = (0x1F & rv) |
 538                                         (0xE0 & (gv << 5));
 539                                 *f++ = (0x03 & (gv >> 3)) |
 540                                         (0x7C & (bv << 2));
 541                                 break;
 542                         }
 543                 }
 544                 clipmask_index += clipmask_add;
 545                 f += stretch_bytes;
 546
 547                 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 548                         *f++ = yuyv[2]; /* Y */
 549                         *f++ = yuyv[1]; /* V */
 550                 } else {
 551                         YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
 552                         switch (frame->v4l2_format.format) {
 553                         case V4L2_PIX_FMT_RGB565:
 554                                 *f++ = (0x1F & rv) |
 555                                         (0xE0 & (gv << 5));
 556                                 *f++ = (0x07 & (gv >> 3)) |
 557                                         (0xF8 &  bv);
 558                                 break;
 559                         case V4L2_PIX_FMT_RGB24:
 560                                 *f++ = rv;
 561                                 *f++ = gv;
 562                                 *f++ = bv;
 563                                 break;
 564                         case V4L2_PIX_FMT_RGB32:
 565                                 *f++ = rv;
 566                                 *f++ = gv;
 567                                 *f++ = bv;
 568                                 f++;
 569                                 break;
 570                         case V4L2_PIX_FMT_RGB555:
 571                                 *f++ = (0x1F & rv) |
 572                                         (0xE0 & (gv << 5));
 573                                 *f++ = (0x03 & (gv >> 3)) |
 574                                         (0x7C & (bv << 2));
 575                                 break;
 576                         }
 577                 }
 578                 clipmask_index += clipmask_add;
 579                 f += stretch_bytes;
 580         }
 581
 582         frame->curline += usbvision->stretch_height;
 583         *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
 584
 585         if (frame->curline >= frame->frmheight)
 586                 return parse_state_next_frame;
 587         return parse_state_continue;
 588 }
 589
 590 /* The decompression routine  */
 591 static int usbvision_decompress(struct usb_usbvision *usbvision, unsigned char *compressed,
 592                                                                 unsigned char *decompressed, int *start_pos,
 593                                                                 int *block_typestart_pos, int len)
 594 {
 595         int rest_pixel, idx, pos, extra_pos, block_len, block_type_pos, block_type_len;
 596         unsigned char block_byte, block_code, block_type, block_type_byte, integrator;
 597
 598         integrator = 0;
 599         pos = *start_pos;
 600         block_type_pos = *block_typestart_pos;
 601         extra_pos = pos;
 602         block_len = 0;
 603         block_byte = 0;
 604         block_code = 0;
 605         block_type = 0;
 606         block_type_byte = 0;
 607         block_type_len = 0;
 608         rest_pixel = len;
 609
 610         for (idx = 0; idx < len; idx++) {
 611                 if (block_len == 0) {
 612                         if (block_type_len == 0) {
 613                                 block_type_byte = compressed[block_type_pos];
 614                                 block_type_pos++;
 615                                 block_type_len = 4;
 616                         }
 617                         block_type = (block_type_byte & 0xC0) >> 6;
 618
 619                         /* statistic: */
 620                         usbvision->compr_block_types[block_type]++;
 621
 622                         pos = extra_pos;
 623                         if (block_type == 0) {
 624                                 if (rest_pixel >= 24) {
 625                                         idx += 23;
 626                                         rest_pixel -= 24;
 627                                         integrator = decompressed[idx];
 628                                 } else {
 629                                         idx += rest_pixel - 1;
 630                                         rest_pixel = 0;
 631                                 }
 632                         } else {
 633                                 block_code = compressed[pos];
 634                                 pos++;
 635                                 if (rest_pixel >= 24)
 636                                         block_len  = 24;
 637                                 else
 638                                         block_len = rest_pixel;
 639                                 rest_pixel -= block_len;
 640                                 extra_pos = pos + (block_len / 4);
 641                         }
 642                         block_type_byte <<= 2;
 643                         block_type_len -= 1;
 644                 }
 645                 if (block_len > 0) {
 646                         if ((block_len % 4) == 0) {
 647                                 block_byte = compressed[pos];
 648                                 pos++;
 649                         }
 650                         if (block_type == 1) /* inter Block */
 651                                 integrator = decompressed[idx];
 652                         switch (block_byte & 0xC0) {
 653                         case 0x03 << 6:
 654                                 integrator += compressed[extra_pos];
 655                                 extra_pos++;
 656                                 break;
 657                         case 0x02 << 6:
 658                                 integrator += block_code;
 659                                 break;
 660                         case 0x00:
 661                                 integrator -= block_code;
 662                                 break;
 663                         }
 664                         decompressed[idx] = integrator;
 665                         block_byte <<= 2;
 666                         block_len -= 1;
 667                 }
 668         }
 669         *start_pos = extra_pos;
 670         *block_typestart_pos = block_type_pos;
 671         return idx;
 672 }
 673
 674
 675 /*
 676  * usbvision_parse_compress()
 677  *
 678  * Parse compressed frame from the scratch buffer, put
 679  * decoded RGB value into the current frame buffer and add the written
 680  * number of bytes (RGB) to the *pcopylen.
 681  *
 682  */
 683 static enum parse_state usbvision_parse_compress(struct usb_usbvision *usbvision,
 684                                            long *pcopylen)
 685 {
 686 #define USBVISION_STRIP_MAGIC           0x5A
 687 #define USBVISION_STRIP_LEN_MAX         400
 688 #define USBVISION_STRIP_HEADER_LEN      3
 689
 690         struct usbvision_frame *frame;
 691         unsigned char *f, *u = NULL, *v = NULL;
 692         unsigned char strip_data[USBVISION_STRIP_LEN_MAX];
 693         unsigned char strip_header[USBVISION_STRIP_HEADER_LEN];
 694         int idx, idx_end, strip_len, strip_ptr, startblock_pos, block_pos, block_type_pos;
 695         int clipmask_index;
 696         int image_size;
 697         unsigned char rv, gv, bv;
 698         static unsigned char *Y, *U, *V;
 699
 700         frame = usbvision->cur_frame;
 701         image_size = frame->frmwidth * frame->frmheight;
 702         if ((frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
 703             (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420)) {       /* this is a planar format */
 704                 /* ... v4l2_linesize not used here. */
 705                 f = frame->data + (frame->width * frame->curline);
 706         } else
 707                 f = frame->data + (frame->v4l2_linesize * frame->curline);
 708
 709         if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { /* initialise u and v pointers */
 710                 /* get base of u and b planes add halfoffset */
 711                 u = frame->data
 712                         + image_size
 713                         + (frame->frmwidth >> 1) * frame->curline;
 714                 v = u + (image_size >> 1);
 715         } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
 716                 v = frame->data + image_size + ((frame->curline * (frame->width)) >> 2);
 717                 u = v + (image_size >> 2);
 718         }
 719
 720         if (frame->curline == 0)
 721                 usbvision_adjust_compression(usbvision);
 722
 723         if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN)
 724                 return parse_state_out;
 725
 726         /* get strip header without changing the scratch_read_ptr */
 727         scratch_set_extra_ptr(usbvision, &strip_ptr, 0);
 728         scratch_get_extra(usbvision, &strip_header[0], &strip_ptr,
 729                                 USBVISION_STRIP_HEADER_LEN);
 730
 731         if (strip_header[0] != USBVISION_STRIP_MAGIC) {
 732                 /* wrong strip magic */
 733                 usbvision->strip_magic_errors++;
 734                 return parse_state_next_frame;
 735         }
 736
 737         if (frame->curline != (int)strip_header[2]) {
 738                 /* line number mismatch error */
 739                 usbvision->strip_line_number_errors++;
 740         }
 741
 742         strip_len = 2 * (unsigned int)strip_header[1];
 743         if (strip_len > USBVISION_STRIP_LEN_MAX) {
 744                 /* strip overrun */
 745                 /* I think this never happens */
 746                 usbvision_request_intra(usbvision);
 747         }
 748
 749         if (scratch_len(usbvision) < strip_len) {
 750                 /* there is not enough data for the strip */
 751                 return parse_state_out;
 752         }
 753
 754         if (usbvision->intra_frame_buffer) {
 755                 Y = usbvision->intra_frame_buffer + frame->frmwidth * frame->curline;
 756                 U = usbvision->intra_frame_buffer + image_size + (frame->frmwidth / 2) * (frame->curline / 2);
 757                 V = usbvision->intra_frame_buffer + image_size / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
 758         } else {
 759                 return parse_state_next_frame;
 760         }
 761
 762         clipmask_index = frame->curline * MAX_FRAME_WIDTH;
 763
 764         scratch_get(usbvision, strip_data, strip_len);
 765
 766         idx_end = frame->frmwidth;
 767         block_type_pos = USBVISION_STRIP_HEADER_LEN;
 768         startblock_pos = block_type_pos + (idx_end - 1) / 96 + (idx_end / 2 - 1) / 96 + 2;
 769         block_pos = startblock_pos;
 770
 771         usbvision->block_pos = block_pos;
 772
 773         usbvision_decompress(usbvision, strip_data, Y, &block_pos, &block_type_pos, idx_end);
 774         if (strip_len > usbvision->max_strip_len)
 775                 usbvision->max_strip_len = strip_len;
 776
 777         if (frame->curline % 2)
 778                 usbvision_decompress(usbvision, strip_data, V, &block_pos, &block_type_pos, idx_end / 2);
 779         else
 780                 usbvision_decompress(usbvision, strip_data, U, &block_pos, &block_type_pos, idx_end / 2);
 781
 782         if (block_pos > usbvision->comprblock_pos)
 783                 usbvision->comprblock_pos = block_pos;
 784         if (block_pos > strip_len)
 785                 usbvision->strip_len_errors++;
 786
 787         for (idx = 0; idx < idx_end; idx++) {
 788                 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 789                         *f++ = Y[idx];
 790                         *f++ = idx & 0x01 ? U[idx / 2] : V[idx / 2];
 791                 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
 792                         *f++ = Y[idx];
 793                         if (idx & 0x01)
 794                                 *u++ = U[idx >> 1];
 795                         else
 796                                 *v++ = V[idx >> 1];
 797                 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
 798                         *f++ = Y[idx];
 799                         if (!((idx & 0x01) | (frame->curline & 0x01))) {
 800                                 /* only need do this for 1 in 4 pixels */
 801                                 /* intraframe buffer is YUV420 format */
 802                                 *u++ = U[idx >> 1];
 803                                 *v++ = V[idx >> 1];
 804                         }
 805                 } else {
 806                         YUV_TO_RGB_BY_THE_BOOK(Y[idx], U[idx / 2], V[idx / 2], rv, gv, bv);
 807                         switch (frame->v4l2_format.format) {
 808                         case V4L2_PIX_FMT_GREY:
 809                                 *f++ = Y[idx];
 810                                 break;
 811                         case V4L2_PIX_FMT_RGB555:
 812                                 *f++ = (0x1F & rv) |
 813                                         (0xE0 & (gv << 5));
 814                                 *f++ = (0x03 & (gv >> 3)) |
 815                                         (0x7C & (bv << 2));
 816                                 break;
 817                         case V4L2_PIX_FMT_RGB565:
 818                                 *f++ = (0x1F & rv) |
 819                                         (0xE0 & (gv << 5));
 820                                 *f++ = (0x07 & (gv >> 3)) |
 821                                         (0xF8 & bv);
 822                                 break;
 823                         case V4L2_PIX_FMT_RGB24:
 824                                 *f++ = rv;
 825                                 *f++ = gv;
 826                                 *f++ = bv;
 827                                 break;
 828                         case V4L2_PIX_FMT_RGB32:
 829                                 *f++ = rv;
 830                                 *f++ = gv;
 831                                 *f++ = bv;
 832                                 f++;
 833                                 break;
 834                         }
 835                 }
 836                 clipmask_index++;
 837         }
 838         /* Deal with non-integer no. of bytes for YUV420P */
 839         if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420)
 840                 *pcopylen += frame->v4l2_linesize;
 841         else
 842                 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
 843
 844         frame->curline += 1;
 845
 846         if (frame->curline >= frame->frmheight)
 847                 return parse_state_next_frame;
 848         return parse_state_continue;
 849
 850 }
 851
 852
 853 /*
 854  * usbvision_parse_lines_420()
 855  *
 856  * Parse two lines from the scratch buffer, put
 857  * decoded RGB value into the current frame buffer and add the written
 858  * number of bytes (RGB) to the *pcopylen.
 859  *
 860  */
 861 static enum parse_state usbvision_parse_lines_420(struct usb_usbvision *usbvision,
 862                                            long *pcopylen)
 863 {
 864         struct usbvision_frame *frame;
 865         unsigned char *f_even = NULL, *f_odd = NULL;
 866         unsigned int pixel_per_line, block;
 867         int pixel, block_split;
 868         int y_ptr, u_ptr, v_ptr, y_odd_offset;
 869         const int y_block_size = 128;
 870         const int uv_block_size = 64;
 871         const int sub_block_size = 32;
 872         const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4;
 873         const int uv_step[] = { 0, 0, 0, 4 }, uv_step_size = 4;
 874         unsigned char y[2], u, v;       /* YUV components */
 875         int y_, u_, v_, vb, uvg, ur;
 876         int r_, g_, b_;                 /* RGB components */
 877         unsigned char g;
 878         int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
 879         int clipmask_add, stretch_bytes;
 880
 881         frame  = usbvision->cur_frame;
 882         f_even = frame->data + (frame->v4l2_linesize * frame->curline);
 883         f_odd  = f_even + frame->v4l2_linesize * usbvision->stretch_height;
 884
 885         /* Make sure there's enough data for the entire line */
 886         /* In this mode usbvision transfer 3 bytes for every 2 pixels */
 887         /* I need two lines to decode the color */
 888         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
 889         stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
 890         clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
 891         clipmask_odd_index  = clipmask_even_index + MAX_FRAME_WIDTH;
 892         clipmask_add = usbvision->stretch_width;
 893         pixel_per_line = frame->isoc_header.frame_width;
 894
 895         if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
 896                 /* printk(KERN_DEBUG "out of data, need %d\n", len); */
 897                 return parse_state_out;
 898         }
 899
 900         if ((frame->curline + 1) >= frame->frmheight)
 901                 return parse_state_next_frame;
 902
 903         block_split = (pixel_per_line%y_block_size) ? 1 : 0;    /* are some blocks splitted into different lines? */
 904
 905         y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
 906                         + block_split * uv_block_size;
 907
 908         scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
 909         scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
 910         scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
 911                         + (4 - block_split) * sub_block_size);
 912
 913         for (block = 0; block < (pixel_per_line / sub_block_size); block++) {
 914                 for (pixel = 0; pixel < sub_block_size; pixel += 2) {
 915                         scratch_get(usbvision, &y[0], 2);
 916                         scratch_get_extra(usbvision, &u, &u_ptr, 1);
 917                         scratch_get_extra(usbvision, &v, &v_ptr, 1);
 918
 919                         /* I don't use the YUV_TO_RGB macro for better performance */
 920                         v_ = v - 128;
 921                         u_ = u - 128;
 922                         vb = 132252 * v_;
 923                         uvg = -53281 * u_ - 25625 * v_;
 924                         ur = 104595 * u_;
 925
 926                         if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 927                                 *f_even++ = y[0];
 928                                 *f_even++ = v;
 929                         } else {
 930                                 y_ = 76284 * (y[0] - 16);
 931
 932                                 b_ = (y_ + vb) >> 16;
 933                                 g_ = (y_ + uvg) >> 16;
 934                                 r_ = (y_ + ur) >> 16;
 935
 936                                 switch (frame->v4l2_format.format) {
 937                                 case V4L2_PIX_FMT_RGB565:
 938                                         g = LIMIT_RGB(g_);
 939                                         *f_even++ =
 940                                                 (0x1F & LIMIT_RGB(r_)) |
 941                                                 (0xE0 & (g << 5));
 942                                         *f_even++ =
 943                                                 (0x07 & (g >> 3)) |
 944                                                 (0xF8 &  LIMIT_RGB(b_));
 945                                         break;
 946                                 case V4L2_PIX_FMT_RGB24:
 947                                         *f_even++ = LIMIT_RGB(r_);
 948                                         *f_even++ = LIMIT_RGB(g_);
 949                                         *f_even++ = LIMIT_RGB(b_);
 950                                         break;
 951                                 case V4L2_PIX_FMT_RGB32:
 952                                         *f_even++ = LIMIT_RGB(r_);
 953                                         *f_even++ = LIMIT_RGB(g_);
 954                                         *f_even++ = LIMIT_RGB(b_);
 955                                         f_even++;
 956                                         break;
 957                                 case V4L2_PIX_FMT_RGB555:
 958                                         g = LIMIT_RGB(g_);
 959                                         *f_even++ = (0x1F & LIMIT_RGB(r_)) |
 960                                                 (0xE0 & (g << 5));
 961                                         *f_even++ = (0x03 & (g >> 3)) |
 962                                                 (0x7C & (LIMIT_RGB(b_) << 2));
 963                                         break;
 964                                 }
 965                         }
 966                         clipmask_even_index += clipmask_add;
 967                         f_even += stretch_bytes;
 968
 969                         if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 970                                 *f_even++ = y[1];
 971                                 *f_even++ = u;
 972                         } else {
 973                                 y_ = 76284 * (y[1] - 16);
 974
 975                                 b_ = (y_ + vb) >> 16;
 976                                 g_ = (y_ + uvg) >> 16;
 977                                 r_ = (y_ + ur) >> 16;
 978
 979                                 switch (frame->v4l2_format.format) {
 980                                 case V4L2_PIX_FMT_RGB565:
 981                                         g = LIMIT_RGB(g_);
 982                                         *f_even++ =
 983                                                 (0x1F & LIMIT_RGB(r_)) |
 984                                                 (0xE0 & (g << 5));
 985                                         *f_even++ =
 986                                                 (0x07 & (g >> 3)) |
 987                                                 (0xF8 &  LIMIT_RGB(b_));
 988                                         break;
 989                                 case V4L2_PIX_FMT_RGB24:
 990                                         *f_even++ = LIMIT_RGB(r_);
 991                                         *f_even++ = LIMIT_RGB(g_);
 992                                         *f_even++ = LIMIT_RGB(b_);
 993                                         break;
 994                                 case V4L2_PIX_FMT_RGB32:
 995                                         *f_even++ = LIMIT_RGB(r_);
 996                                         *f_even++ = LIMIT_RGB(g_);
 997                                         *f_even++ = LIMIT_RGB(b_);
 998                                         f_even++;
 999                                         break;
1000                                 case V4L2_PIX_FMT_RGB555:
1001                                         g = LIMIT_RGB(g_);
1002                                         *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1003                                                 (0xE0 & (g << 5));
1004                                         *f_even++ = (0x03 & (g >> 3)) |
1005                                                 (0x7C & (LIMIT_RGB(b_) << 2));
1006                                         break;
1007                                 }
1008                         }
1009                         clipmask_even_index += clipmask_add;
1010                         f_even += stretch_bytes;
1011
1012                         scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1013
1014                         if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1015                                 *f_odd++ = y[0];
1016                                 *f_odd++ = v;
1017                         } else {
1018                                 y_ = 76284 * (y[0] - 16);
1019
1020                                 b_ = (y_ + vb) >> 16;
1021                                 g_ = (y_ + uvg) >> 16;
1022                                 r_ = (y_ + ur) >> 16;
1023
1024                                 switch (frame->v4l2_format.format) {
1025                                 case V4L2_PIX_FMT_RGB565:
1026                                         g = LIMIT_RGB(g_);
1027                                         *f_odd++ =
1028                                                 (0x1F & LIMIT_RGB(r_)) |
1029                                                 (0xE0 & (g << 5));
1030                                         *f_odd++ =
1031                                                 (0x07 & (g >> 3)) |
1032                                                 (0xF8 &  LIMIT_RGB(b_));
1033                                         break;
1034                                 case V4L2_PIX_FMT_RGB24:
1035                                         *f_odd++ = LIMIT_RGB(r_);
1036                                         *f_odd++ = LIMIT_RGB(g_);
1037                                         *f_odd++ = LIMIT_RGB(b_);
1038                                         break;
1039                                 case V4L2_PIX_FMT_RGB32:
1040                                         *f_odd++ = LIMIT_RGB(r_);
1041                                         *f_odd++ = LIMIT_RGB(g_);
1042                                         *f_odd++ = LIMIT_RGB(b_);
1043                                         f_odd++;
1044                                         break;
1045                                 case V4L2_PIX_FMT_RGB555:
1046                                         g = LIMIT_RGB(g_);
1047                                         *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1048                                                 (0xE0 & (g << 5));
1049                                         *f_odd++ = (0x03 & (g >> 3)) |
1050                                                 (0x7C & (LIMIT_RGB(b_) << 2));
1051                                         break;
1052                                 }
1053                         }
1054                         clipmask_odd_index += clipmask_add;
1055                         f_odd += stretch_bytes;
1056
1057                         if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1058                                 *f_odd++ = y[1];
1059                                 *f_odd++ = u;
1060                         } else {
1061                                 y_ = 76284 * (y[1] - 16);
1062
1063                                 b_ = (y_ + vb) >> 16;
1064                                 g_ = (y_ + uvg) >> 16;
1065                                 r_ = (y_ + ur) >> 16;
1066
1067                                 switch (frame->v4l2_format.format) {
1068                                 case V4L2_PIX_FMT_RGB565:
1069                                         g = LIMIT_RGB(g_);
1070                                         *f_odd++ =
1071                                                 (0x1F & LIMIT_RGB(r_)) |
1072                                                 (0xE0 & (g << 5));
1073                                         *f_odd++ =
1074                                                 (0x07 & (g >> 3)) |
1075                                                 (0xF8 &  LIMIT_RGB(b_));
1076                                         break;
1077                                 case V4L2_PIX_FMT_RGB24:
1078                                         *f_odd++ = LIMIT_RGB(r_);
1079                                         *f_odd++ = LIMIT_RGB(g_);
1080                                         *f_odd++ = LIMIT_RGB(b_);
1081                                         break;
1082                                 case V4L2_PIX_FMT_RGB32:
1083                                         *f_odd++ = LIMIT_RGB(r_);
1084                                         *f_odd++ = LIMIT_RGB(g_);
1085                                         *f_odd++ = LIMIT_RGB(b_);
1086                                         f_odd++;
1087                                         break;
1088                                 case V4L2_PIX_FMT_RGB555:
1089                                         g = LIMIT_RGB(g_);
1090                                         *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1091                                                 (0xE0 & (g << 5));
1092                                         *f_odd++ = (0x03 & (g >> 3)) |
1093                                                 (0x7C & (LIMIT_RGB(b_) << 2));
1094                                         break;
1095                                 }
1096                         }
1097                         clipmask_odd_index += clipmask_add;
1098                         f_odd += stretch_bytes;
1099                 }
1100
1101                 scratch_rm_old(usbvision, y_step[block % y_step_size] * sub_block_size);
1102                 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1103                                 * sub_block_size);
1104                 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1105                                 * sub_block_size);
1106                 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1107                                 * sub_block_size);
1108         }
1109
1110         scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1111                         + block_split * sub_block_size);
1112
1113         frame->curline += 2 * usbvision->stretch_height;
1114         *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1115
1116         if (frame->curline >= frame->frmheight)
1117                 return parse_state_next_frame;
1118         return parse_state_continue;
1119 }
1120
1121 /*
1122  * usbvision_parse_data()
1123  *
1124  * Generic routine to parse the scratch buffer. It employs either
1125  * usbvision_find_header() or usbvision_parse_lines() to do most
1126  * of work.
1127  *
1128  */
1129 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1130 {
1131         struct usbvision_frame *frame;
1132         enum parse_state newstate;
1133         long copylen = 0;
1134         unsigned long lock_flags;
1135
1136         frame = usbvision->cur_frame;
1137
1138         PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1139
1140         while (1) {
1141                 newstate = parse_state_out;
1142                 if (scratch_len(usbvision)) {
1143                         if (frame->scanstate == scan_state_scanning) {
1144                                 newstate = usbvision_find_header(usbvision);
1145                         } else if (frame->scanstate == scan_state_lines) {
1146                                 if (usbvision->isoc_mode == ISOC_MODE_YUV420)
1147                                         newstate = usbvision_parse_lines_420(usbvision, &copylen);
1148                                 else if (usbvision->isoc_mode == ISOC_MODE_YUV422)
1149                                         newstate = usbvision_parse_lines_422(usbvision, &copylen);
1150                                 else if (usbvision->isoc_mode == ISOC_MODE_COMPRESS)
1151                                         newstate = usbvision_parse_compress(usbvision, &copylen);
1152                         }
1153                 }
1154                 if (newstate == parse_state_continue)
1155                         continue;
1156                 if ((newstate == parse_state_next_frame) || (newstate == parse_state_out))
1157                         break;
1158                 return; /* parse_state_end_parse */
1159         }
1160
1161         if (newstate == parse_state_next_frame) {
1162                 frame->grabstate = frame_state_done;
1163                 v4l2_get_timestamp(&(frame->timestamp));
1164                 frame->sequence = usbvision->frame_num;
1165
1166                 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1167                 list_move_tail(&(frame->frame), &usbvision->outqueue);
1168                 usbvision->cur_frame = NULL;
1169                 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1170
1171                 usbvision->frame_num++;
1172
1173                 /* This will cause the process to request another frame. */
1174                 if (waitqueue_active(&usbvision->wait_frame)) {
1175                         PDEBUG(DBG_PARSE, "Wake up !");
1176                         wake_up_interruptible(&usbvision->wait_frame);
1177                 }
1178         } else {
1179                 frame->grabstate = frame_state_grabbing;
1180         }
1181
1182         /* Update the frame's uncompressed length. */
1183         frame->scanlength += copylen;
1184 }
1185
1186
1187 /*
1188  * Make all of the blocks of data contiguous
1189  */
1190 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1191                                           struct urb *urb)
1192 {
1193         unsigned char *packet_data;
1194         int i, totlen = 0;
1195
1196         for (i = 0; i < urb->number_of_packets; i++) {
1197                 int packet_len = urb->iso_frame_desc[i].actual_length;
1198                 int packet_stat = urb->iso_frame_desc[i].status;
1199
1200                 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1201
1202                 /* Detect and ignore errored packets */
1203                 if (packet_stat) {      /* packet_stat != 0 ????????????? */
1204                         PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1205                         usbvision->isoc_err_count++;
1206                         continue;
1207                 }
1208
1209                 /* Detect and ignore empty packets */
1210                 if (packet_len < 0) {
1211                         PDEBUG(DBG_ISOC, "error packet [%d]", i);
1212                         usbvision->isoc_skip_count++;
1213                         continue;
1214                 } else if (packet_len == 0) {   /* Frame end ????? */
1215                         PDEBUG(DBG_ISOC, "null packet [%d]", i);
1216                         usbvision->isocstate = isoc_state_no_frame;
1217                         usbvision->isoc_skip_count++;
1218                         continue;
1219                 } else if (packet_len > usbvision->isoc_packet_size) {
1220                         PDEBUG(DBG_ISOC, "packet[%d] > isoc_packet_size", i);
1221                         usbvision->isoc_skip_count++;
1222                         continue;
1223                 }
1224
1225                 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1226
1227                 if (usbvision->isocstate == isoc_state_no_frame) { /* new frame begins */
1228                         usbvision->isocstate = isoc_state_in_frame;
1229                         scratch_mark_header(usbvision);
1230                         usbvision_measure_bandwidth(usbvision);
1231                         PDEBUG(DBG_ISOC, "packet with header");
1232                 }
1233
1234                 /*
1235                  * If usbvision continues to feed us with data but there is no
1236                  * consumption (if, for example, V4L client fell asleep) we
1237                  * may overflow the buffer. We have to move old data over to
1238                  * free room for new data. This is bad for old data. If we
1239                  * just drop new data then it's bad for new data... choose
1240                  * your favorite evil here.
1241                  */
1242                 if (scratch_free(usbvision) < packet_len) {
1243                         usbvision->scratch_ovf_count++;
1244                         PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1245                                scratch_len(usbvision), packet_len);
1246                         scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1247                 }
1248
1249                 /* Now we know that there is enough room in scratch buffer */
1250                 scratch_put(usbvision, packet_data, packet_len);
1251                 totlen += packet_len;
1252                 usbvision->isoc_data_count += packet_len;
1253                 usbvision->isoc_packet_count++;
1254         }
1255 #if ENABLE_HEXDUMP
1256         if (totlen > 0) {
1257                 static int foo;
1258
1259                 if (foo < 1) {
1260                         printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1261                         usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1262                         ++foo;
1263                 }
1264         }
1265 #endif
1266         return totlen;
1267 }
1268
1269 static void usbvision_isoc_irq(struct urb *urb)
1270 {
1271         int err_code = 0;
1272         int len;
1273         struct usb_usbvision *usbvision = urb->context;
1274         int i;
1275         unsigned long start_time = jiffies;
1276         struct usbvision_frame **f;
1277
1278         /* We don't want to do anything if we are about to be removed! */
1279         if (!USBVISION_IS_OPERATIONAL(usbvision))
1280                 return;
1281
1282         /* any urb with wrong status is ignored without acknowledgement */
1283         if (urb->status == -ENOENT)
1284                 return;
1285
1286         f = &usbvision->cur_frame;
1287
1288         /* Manage streaming interruption */
1289         if (usbvision->streaming == stream_interrupt) {
1290                 usbvision->streaming = stream_idle;
1291                 if ((*f)) {
1292                         (*f)->grabstate = frame_state_ready;
1293                         (*f)->scanstate = scan_state_scanning;
1294                 }
1295                 PDEBUG(DBG_IRQ, "stream interrupted");
1296                 wake_up_interruptible(&usbvision->wait_stream);
1297         }
1298
1299         /* Copy the data received into our scratch buffer */
1300         len = usbvision_compress_isochronous(usbvision, urb);
1301
1302         usbvision->isoc_urb_count++;
1303         usbvision->urb_length = len;
1304
1305         if (usbvision->streaming == stream_on) {
1306                 /* If we collected enough data let's parse! */
1307                 if (scratch_len(usbvision) > USBVISION_HEADER_LENGTH &&
1308                     !list_empty(&(usbvision->inqueue))) {
1309                         if (!(*f)) {
1310                                 (*f) = list_entry(usbvision->inqueue.next,
1311                                                   struct usbvision_frame,
1312                                                   frame);
1313                         }
1314                         usbvision_parse_data(usbvision);
1315                 } else {
1316                         /* If we don't have a frame
1317                           we're current working on, complain */
1318                         PDEBUG(DBG_IRQ,
1319                                "received data, but no one needs it");
1320                         scratch_reset(usbvision);
1321                 }
1322         } else {
1323                 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1324                 scratch_reset(usbvision);
1325         }
1326
1327         usbvision->time_in_irq += jiffies - start_time;
1328
1329         for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1330                 urb->iso_frame_desc[i].status = 0;
1331                 urb->iso_frame_desc[i].actual_length = 0;
1332         }
1333
1334         urb->status = 0;
1335         urb->dev = usbvision->dev;
1336         err_code = usb_submit_urb(urb, GFP_ATOMIC);
1337
1338         if (err_code) {
1339                 dev_err(&usbvision->dev->dev,
1340                         "%s: usb_submit_urb failed: error %d\n",
1341                                 __func__, err_code);
1342         }
1343
1344         return;
1345 }
1346
1347 /*************************************/
1348 /* Low level usbvision access functions */
1349 /*************************************/
1350
1351 /*
1352  * usbvision_read_reg()
1353  *
1354  * return  < 0 -> Error
1355  *        >= 0 -> Data
1356  */
1357
1358 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1359 {
1360         int err_code = 0;
1361         unsigned char *buffer = usbvision->ctrl_urb_buffer;
1362
1363         if (!USBVISION_IS_OPERATIONAL(usbvision))
1364                 return -1;
1365
1366         err_code = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1367                                 USBVISION_OP_CODE,
1368                                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1369                                 0, (__u16) reg, buffer, 1, HZ);
1370
1371         if (err_code < 0) {
1372                 dev_err(&usbvision->dev->dev,
1373                         "%s: failed: error %d\n", __func__, err_code);
1374                 return err_code;
1375         }
1376         return buffer[0];
1377 }
1378
1379 /*
1380  * usbvision_write_reg()
1381  *
1382  * return 1 -> Reg written
1383  *        0 -> usbvision is not yet ready
1384  *       -1 -> Something went wrong
1385  */
1386
1387 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1388                             unsigned char value)
1389 {
1390         int err_code = 0;
1391
1392         if (!USBVISION_IS_OPERATIONAL(usbvision))
1393                 return 0;
1394
1395         usbvision->ctrl_urb_buffer[0] = value;
1396         err_code = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1397                                 USBVISION_OP_CODE,
1398                                 USB_DIR_OUT | USB_TYPE_VENDOR |
1399                                 USB_RECIP_ENDPOINT, 0, (__u16) reg,
1400                                 usbvision->ctrl_urb_buffer, 1, HZ);
1401
1402         if (err_code < 0) {
1403                 dev_err(&usbvision->dev->dev,
1404                         "%s: failed: error %d\n", __func__, err_code);
1405         }
1406         return err_code;
1407 }
1408
1409
1410 static void usbvision_ctrl_urb_complete(struct urb *urb)
1411 {
1412         struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1413
1414         PDEBUG(DBG_IRQ, "");
1415         usbvision->ctrl_urb_busy = 0;
1416 }
1417
1418
1419 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision, int address,
1420                                 unsigned char *data, int len)
1421 {
1422         int err_code = 0;
1423
1424         PDEBUG(DBG_IRQ, "");
1425         if (len > 8)
1426                 return -EFAULT;
1427         if (usbvision->ctrl_urb_busy)
1428                 return -EBUSY;
1429         usbvision->ctrl_urb_busy = 1;
1430
1431         usbvision->ctrl_urb_setup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1432         usbvision->ctrl_urb_setup.bRequest     = USBVISION_OP_CODE;
1433         usbvision->ctrl_urb_setup.wValue       = 0;
1434         usbvision->ctrl_urb_setup.wIndex       = cpu_to_le16(address);
1435         usbvision->ctrl_urb_setup.wLength      = cpu_to_le16(len);
1436         usb_fill_control_urb(usbvision->ctrl_urb, usbvision->dev,
1437                                                         usb_sndctrlpipe(usbvision->dev, 1),
1438                                                         (unsigned char *)&usbvision->ctrl_urb_setup,
1439                                                         (void *)usbvision->ctrl_urb_buffer, len,
1440                                                         usbvision_ctrl_urb_complete,
1441                                                         (void *)usbvision);
1442
1443         memcpy(usbvision->ctrl_urb_buffer, data, len);
1444
1445         err_code = usb_submit_urb(usbvision->ctrl_urb, GFP_ATOMIC);
1446         if (err_code < 0) {
1447                 /* error in usb_submit_urb() */
1448                 usbvision->ctrl_urb_busy = 0;
1449         }
1450         PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, err_code);
1451         return err_code;
1452 }
1453
1454
1455 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1456 {
1457         usbvision->last_isoc_frame_num = -1;
1458         usbvision->isoc_data_count = 0;
1459         usbvision->isoc_packet_count = 0;
1460         usbvision->isoc_skip_count = 0;
1461         usbvision->compr_level = 50;
1462         usbvision->last_compr_level = -1;
1463         usbvision->isoc_urb_count = 0;
1464         usbvision->request_intra = 1;
1465         usbvision->isoc_measure_bandwidth_count = 0;
1466
1467         return 0;
1468 }
1469
1470 /* this function measures the used bandwidth since last call
1471  * return:    0 : no error
1472  * sets used_bandwidth to 1-100 : 1-100% of full bandwidth resp. to isoc_packet_size
1473  */
1474 static int usbvision_measure_bandwidth(struct usb_usbvision *usbvision)
1475 {
1476         if (usbvision->isoc_measure_bandwidth_count < 2) { /* this gives an average bandwidth of 3 frames */
1477                 usbvision->isoc_measure_bandwidth_count++;
1478                 return 0;
1479         }
1480         if ((usbvision->isoc_packet_size > 0) && (usbvision->isoc_packet_count > 0)) {
1481                 usbvision->used_bandwidth = usbvision->isoc_data_count /
1482                                         (usbvision->isoc_packet_count + usbvision->isoc_skip_count) *
1483                                         100 / usbvision->isoc_packet_size;
1484         }
1485         usbvision->isoc_measure_bandwidth_count = 0;
1486         usbvision->isoc_data_count = 0;
1487         usbvision->isoc_packet_count = 0;
1488         usbvision->isoc_skip_count = 0;
1489         return 0;
1490 }
1491
1492 static int usbvision_adjust_compression(struct usb_usbvision *usbvision)
1493 {
1494         int err_code = 0;
1495         unsigned char buffer[6];
1496
1497         PDEBUG(DBG_IRQ, "");
1498         if ((adjust_compression) && (usbvision->used_bandwidth > 0)) {
1499                 usbvision->compr_level += (usbvision->used_bandwidth - 90) / 2;
1500                 RESTRICT_TO_RANGE(usbvision->compr_level, 0, 100);
1501                 if (usbvision->compr_level != usbvision->last_compr_level) {
1502                         int distortion;
1503
1504                         if (usbvision->bridge_type == BRIDGE_NT1004 || usbvision->bridge_type == BRIDGE_NT1005) {
1505                                 buffer[0] = (unsigned char)(4 + 16 * usbvision->compr_level / 100);     /* PCM Threshold 1 */
1506                                 buffer[1] = (unsigned char)(4 + 8 * usbvision->compr_level / 100);      /* PCM Threshold 2 */
1507                                 distortion = 7 + 248 * usbvision->compr_level / 100;
1508                                 buffer[2] = (unsigned char)(distortion & 0xFF);                         /* Average distortion Threshold (inter) */
1509                                 buffer[3] = (unsigned char)(distortion & 0xFF);                         /* Average distortion Threshold (intra) */
1510                                 distortion = 1 + 42 * usbvision->compr_level / 100;
1511                                 buffer[4] = (unsigned char)(distortion & 0xFF);                         /* Maximum distortion Threshold (inter) */
1512                                 buffer[5] = (unsigned char)(distortion & 0xFF);                         /* Maximum distortion Threshold (intra) */
1513                         } else { /* BRIDGE_NT1003 */
1514                                 buffer[0] = (unsigned char)(4 + 16 * usbvision->compr_level / 100);     /* PCM threshold 1 */
1515                                 buffer[1] = (unsigned char)(4 + 8 * usbvision->compr_level / 100);      /* PCM threshold 2 */
1516                                 distortion = 2 + 253 * usbvision->compr_level / 100;
1517                                 buffer[2] = (unsigned char)(distortion & 0xFF);                         /* distortion threshold bit0-7 */
1518                                 buffer[3] = 0;  /* (unsigned char)((distortion >> 8) & 0x0F);           distortion threshold bit 8-11 */
1519                                 distortion = 0 + 43 * usbvision->compr_level / 100;
1520                                 buffer[4] = (unsigned char)(distortion & 0xFF);                         /* maximum distortion bit0-7 */
1521                                 buffer[5] = 0; /* (unsigned char)((distortion >> 8) & 0x01);            maximum distortion bit 8 */
1522                         }
1523                         err_code = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1524                         if (err_code == 0) {
1525                                 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1526                                                                 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1527                                 usbvision->last_compr_level = usbvision->compr_level;
1528                         }
1529                 }
1530         }
1531         return err_code;
1532 }
1533
1534 static int usbvision_request_intra(struct usb_usbvision *usbvision)
1535 {
1536         unsigned char buffer[1];
1537
1538         PDEBUG(DBG_IRQ, "");
1539         usbvision->request_intra = 1;
1540         buffer[0] = 1;
1541         usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1542         return 0;
1543 }
1544
1545 static int usbvision_unrequest_intra(struct usb_usbvision *usbvision)
1546 {
1547         unsigned char buffer[1];
1548
1549         PDEBUG(DBG_IRQ, "");
1550         usbvision->request_intra = 0;
1551         buffer[0] = 0;
1552         usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1553         return 0;
1554 }
1555
1556 /*******************************
1557  * usbvision utility functions
1558  *******************************/
1559
1560 int usbvision_power_off(struct usb_usbvision *usbvision)
1561 {
1562         int err_code = 0;
1563
1564         PDEBUG(DBG_FUNC, "");
1565
1566         err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1567         if (err_code == 1)
1568                 usbvision->power = 0;
1569         PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code != 1) ? "ERROR" : "power is off", err_code);
1570         return err_code;
1571 }
1572
1573 /* configure webcam image sensor using the serial port */
1574 static int usbvision_init_webcam(struct usb_usbvision *usbvision)
1575 {
1576         int rc;
1577         int i;
1578         static char init_values[38][3] = {
1579                 { 0x04, 0x12, 0x08 }, { 0x05, 0xff, 0xc8 }, { 0x06, 0x18, 0x07 }, { 0x07, 0x90, 0x00 },
1580                 { 0x09, 0x00, 0x00 }, { 0x0a, 0x00, 0x00 }, { 0x0b, 0x08, 0x00 }, { 0x0d, 0xcc, 0xcc },
1581                 { 0x0e, 0x13, 0x14 }, { 0x10, 0x9b, 0x83 }, { 0x11, 0x5a, 0x3f }, { 0x12, 0xe4, 0x73 },
1582                 { 0x13, 0x88, 0x84 }, { 0x14, 0x89, 0x80 }, { 0x15, 0x00, 0x20 }, { 0x16, 0x00, 0x00 },
1583                 { 0x17, 0xff, 0xa0 }, { 0x18, 0x6b, 0x20 }, { 0x19, 0x22, 0x40 }, { 0x1a, 0x10, 0x07 },
1584                 { 0x1b, 0x00, 0x47 }, { 0x1c, 0x03, 0xe0 }, { 0x1d, 0x00, 0x00 }, { 0x1e, 0x00, 0x00 },
1585                 { 0x1f, 0x00, 0x00 }, { 0x20, 0x00, 0x00 }, { 0x21, 0x00, 0x00 }, { 0x22, 0x00, 0x00 },
1586                 { 0x23, 0x00, 0x00 }, { 0x24, 0x00, 0x00 }, { 0x25, 0x00, 0x00 }, { 0x26, 0x00, 0x00 },
1587                 { 0x27, 0x00, 0x00 }, { 0x28, 0x00, 0x00 }, { 0x29, 0x00, 0x00 }, { 0x08, 0x80, 0x60 },
1588                 { 0x0f, 0x2d, 0x24 }, { 0x0c, 0x80, 0x80 }
1589         };
1590         unsigned char *value = usbvision->ctrl_urb_buffer;
1591
1592         /* the only difference between PAL and NTSC init_values */
1593         if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_NTSC)
1594                 init_values[4][1] = 0x34;
1595
1596         for (i = 0; i < sizeof(init_values) / 3; i++) {
1597                 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT);
1598                 memcpy(value, init_values[i], 3);
1599                 rc = usb_control_msg(usbvision->dev,
1600                                      usb_sndctrlpipe(usbvision->dev, 1),
1601                                      USBVISION_OP_CODE,
1602                                      USB_DIR_OUT | USB_TYPE_VENDOR |
1603                                      USB_RECIP_ENDPOINT, 0,
1604                                      (__u16) USBVISION_SER_DAT1, value,
1605                                      3, HZ);
1606                 if (rc < 0)
1607                         return rc;
1608                 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SIO);
1609                 /* write 3 bytes to the serial port using SIO mode */
1610                 usbvision_write_reg(usbvision, USBVISION_SER_CONT, 3 | 0x10);
1611                 usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, 0);
1612                 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT);
1613                 usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_IO_2);
1614                 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT);
1615                 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_DAT_IO);
1616                 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT | USBVISION_DAT_IO);
1617         }
1618
1619         return 0;
1620 }
1621
1622 /*
1623  * usbvision_set_video_format()
1624  *
1625  */
1626 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1627 {
1628         static const char proc[] = "usbvision_set_video_format";
1629         unsigned char *value = usbvision->ctrl_urb_buffer;
1630         int rc;
1631
1632         if (!USBVISION_IS_OPERATIONAL(usbvision))
1633                 return 0;
1634
1635         PDEBUG(DBG_FUNC, "isoc_mode %#02x", format);
1636
1637         if ((format != ISOC_MODE_YUV422)
1638             && (format != ISOC_MODE_YUV420)
1639             && (format != ISOC_MODE_COMPRESS)) {
1640                 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1641                        format);
1642                 format = ISOC_MODE_YUV420;
1643         }
1644         value[0] = 0x0A;  /* TODO: See the effect of the filter */
1645         value[1] = format; /* Sets the VO_MODE register which follows FILT_CONT */
1646         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1647                              USBVISION_OP_CODE,
1648                              USB_DIR_OUT | USB_TYPE_VENDOR |
1649                              USB_RECIP_ENDPOINT, 0,
1650                              (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1651
1652         if (rc < 0) {
1653                 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
1654                        proc, rc);
1655         }
1656         usbvision->isoc_mode = format;
1657         return rc;
1658 }
1659
1660 /*
1661  * usbvision_set_output()
1662  *
1663  */
1664
1665 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1666                          int height)
1667 {
1668         int err_code = 0;
1669         int usb_width, usb_height;
1670         unsigned int frame_rate = 0, frame_drop = 0;
1671         unsigned char *value = usbvision->ctrl_urb_buffer;
1672
1673         if (!USBVISION_IS_OPERATIONAL(usbvision))
1674                 return 0;
1675
1676         if (width > MAX_USB_WIDTH) {
1677                 usb_width = width / 2;
1678                 usbvision->stretch_width = 2;
1679         } else {
1680                 usb_width = width;
1681                 usbvision->stretch_width = 1;
1682         }
1683
1684         if (height > MAX_USB_HEIGHT) {
1685                 usb_height = height / 2;
1686                 usbvision->stretch_height = 2;
1687         } else {
1688                 usb_height = height;
1689                 usbvision->stretch_height = 1;
1690         }
1691
1692         RESTRICT_TO_RANGE(usb_width, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1693         usb_width &= ~(MIN_FRAME_WIDTH-1);
1694         RESTRICT_TO_RANGE(usb_height, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1695         usb_height &= ~(1);
1696
1697         PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1698                                                 usb_width, usb_height, width, height,
1699                                                 usbvision->stretch_width, usbvision->stretch_height);
1700
1701         /* I'll not rewrite the same values */
1702         if ((usb_width != usbvision->curwidth) || (usb_height != usbvision->curheight)) {
1703                 value[0] = usb_width & 0xff;            /* LSB */
1704                 value[1] = (usb_width >> 8) & 0x03;     /* MSB */
1705                 value[2] = usb_height & 0xff;           /* LSB */
1706                 value[3] = (usb_height >> 8) & 0x03;    /* MSB */
1707
1708                 err_code = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1709                              USBVISION_OP_CODE,
1710                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1711                                  0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1712
1713                 if (err_code < 0) {
1714                         dev_err(&usbvision->dev->dev,
1715                                 "%s failed: error %d\n", __func__, err_code);
1716                         return err_code;
1717                 }
1718                 usbvision->curwidth = usbvision->stretch_width * usb_width;
1719                 usbvision->curheight = usbvision->stretch_height * usb_height;
1720         }
1721
1722         if (usbvision->isoc_mode == ISOC_MODE_YUV422)
1723                 frame_rate = (usbvision->isoc_packet_size * 1000) / (usb_width * usb_height * 2);
1724         else if (usbvision->isoc_mode == ISOC_MODE_YUV420)
1725                 frame_rate = (usbvision->isoc_packet_size * 1000) / ((usb_width * usb_height * 12) / 8);
1726         else
1727                 frame_rate = FRAMERATE_MAX;
1728
1729         if (usbvision->tvnorm_id & V4L2_STD_625_50)
1730                 frame_drop = frame_rate * 32 / 25 - 1;
1731         else if (usbvision->tvnorm_id & V4L2_STD_525_60)
1732                 frame_drop = frame_rate * 32 / 30 - 1;
1733
1734         RESTRICT_TO_RANGE(frame_drop, FRAMERATE_MIN, FRAMERATE_MAX);
1735
1736         PDEBUG(DBG_FUNC, "frame_rate %d fps, frame_drop %d", frame_rate, frame_drop);
1737
1738         frame_drop = FRAMERATE_MAX;     /* We can allow the maximum here, because dropping is controlled */
1739
1740         if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
1741                 if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_PAL)
1742                         frame_drop = 25;
1743                 else
1744                         frame_drop = 30;
1745         }
1746
1747         /* frame_drop = 7; => frame_phase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1748                 => frame_skip = 4;
1749                 => frame_rate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1750
1751            frame_drop = 9; => frame_phase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1752             => frame_skip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1753                 => frame_rate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1754         */
1755         err_code = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frame_drop);
1756         return err_code;
1757 }
1758
1759
1760 /*
1761  * usbvision_frames_alloc
1762  * allocate the required frames
1763  */
1764 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
1765 {
1766         int i;
1767
1768         /* needs to be page aligned cause the buffers can be mapped individually! */
1769         usbvision->max_frame_size = PAGE_ALIGN(usbvision->curwidth *
1770                                                 usbvision->curheight *
1771                                                 usbvision->palette.bytes_per_pixel);
1772
1773         /* Try to do my best to allocate the frames the user want in the remaining memory */
1774         usbvision->num_frames = number_of_frames;
1775         while (usbvision->num_frames > 0) {
1776                 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
1777                 usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size);
1778                 if (usbvision->fbuf)
1779                         break;
1780                 usbvision->num_frames--;
1781         }
1782
1783         /* Allocate all buffers */
1784         for (i = 0; i < usbvision->num_frames; i++) {
1785                 usbvision->frame[i].index = i;
1786                 usbvision->frame[i].grabstate = frame_state_unused;
1787                 usbvision->frame[i].data = usbvision->fbuf +
1788                         i * usbvision->max_frame_size;
1789                 /*
1790                  * Set default sizes for read operation.
1791                  */
1792                 usbvision->stretch_width = 1;
1793                 usbvision->stretch_height = 1;
1794                 usbvision->frame[i].width = usbvision->curwidth;
1795                 usbvision->frame[i].height = usbvision->curheight;
1796                 usbvision->frame[i].bytes_read = 0;
1797         }
1798         PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",
1799                         usbvision->num_frames, usbvision->max_frame_size);
1800         return usbvision->num_frames;
1801 }
1802
1803 /*
1804  * usbvision_frames_free
1805  * frees memory allocated for the frames
1806  */
1807 void usbvision_frames_free(struct usb_usbvision *usbvision)
1808 {
1809         /* Have to free all that memory */
1810         PDEBUG(DBG_FUNC, "free %d frames", usbvision->num_frames);
1811
1812         if (usbvision->fbuf != NULL) {
1813                 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1814                 usbvision->fbuf = NULL;
1815
1816                 usbvision->num_frames = 0;
1817         }
1818 }
1819 /*
1820  * usbvision_empty_framequeues()
1821  * prepare queues for incoming and outgoing frames
1822  */
1823 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1824 {
1825         u32 i;
1826
1827         INIT_LIST_HEAD(&(usbvision->inqueue));
1828         INIT_LIST_HEAD(&(usbvision->outqueue));
1829
1830         for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1831                 usbvision->frame[i].grabstate = frame_state_unused;
1832                 usbvision->frame[i].bytes_read = 0;
1833         }
1834 }
1835
1836 /*
1837  * usbvision_stream_interrupt()
1838  * stops streaming
1839  */
1840 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1841 {
1842         int ret = 0;
1843
1844         /* stop reading from the device */
1845
1846         usbvision->streaming = stream_interrupt;
1847         ret = wait_event_timeout(usbvision->wait_stream,
1848                                  (usbvision->streaming == stream_idle),
1849                                  msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1850         return ret;
1851 }
1852
1853 /*
1854  * usbvision_set_compress_params()
1855  *
1856  */
1857
1858 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
1859 {
1860         static const char proc[] = "usbvision_set_compresion_params: ";
1861         int rc;
1862         unsigned char *value = usbvision->ctrl_urb_buffer;
1863
1864         value[0] = 0x0F;    /* Intra-Compression cycle */
1865         value[1] = 0x01;    /* Reg.45 one line per strip */
1866         value[2] = 0x00;    /* Reg.46 Force intra mode on all new frames */
1867         value[3] = 0x00;    /* Reg.47 FORCE_UP <- 0 normal operation (not force) */
1868         value[4] = 0xA2;    /* Reg.48 BUF_THR I'm not sure if this does something in not compressed mode. */
1869         value[5] = 0x00;    /* Reg.49 DVI_YUV This has nothing to do with compression */
1870
1871         /* catched values for NT1004 */
1872         /* value[0] = 0xFF; Never apply intra mode automatically */
1873         /* value[1] = 0xF1; Use full frame height for virtual strip width; One line per strip */
1874         /* value[2] = 0x01; Force intra mode on all new frames */
1875         /* value[3] = 0x00; Strip size 400 Bytes; do not force up */
1876         /* value[4] = 0xA2; */
1877         if (!USBVISION_IS_OPERATIONAL(usbvision))
1878                 return 0;
1879
1880         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1881                              USBVISION_OP_CODE,
1882                              USB_DIR_OUT | USB_TYPE_VENDOR |
1883                              USB_RECIP_ENDPOINT, 0,
1884                              (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
1885
1886         if (rc < 0) {
1887                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
1888                        proc, rc);
1889                 return rc;
1890         }
1891
1892         if (usbvision->bridge_type == BRIDGE_NT1004) {
1893                 value[0] =  20; /* PCM Threshold 1 */
1894                 value[1] =  12; /* PCM Threshold 2 */
1895                 value[2] = 255; /* Distortion Threshold inter */
1896                 value[3] = 255; /* Distortion Threshold intra */
1897                 value[4] =  43; /* Max Distortion inter */
1898                 value[5] =  43; /* Max Distortion intra */
1899         } else {
1900                 value[0] =  20; /* PCM Threshold 1 */
1901                 value[1] =  12; /* PCM Threshold 2 */
1902                 value[2] = 255; /* Distortion Threshold d7-d0 */
1903                 value[3] =   0; /* Distortion Threshold d11-d8 */
1904                 value[4] =  43; /* Max Distortion d7-d0 */
1905                 value[5] =   0; /* Max Distortion d8 */
1906         }
1907
1908         if (!USBVISION_IS_OPERATIONAL(usbvision))
1909                 return 0;
1910
1911         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1912                              USBVISION_OP_CODE,
1913                              USB_DIR_OUT | USB_TYPE_VENDOR |
1914                              USB_RECIP_ENDPOINT, 0,
1915                              (__u16) USBVISION_PCM_THR1, value, 6, HZ);
1916
1917         if (rc < 0) {
1918                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
1919                        proc, rc);
1920         }
1921         return rc;
1922 }
1923
1924
1925 /*
1926  * usbvision_set_input()
1927  *
1928  * Set the input (saa711x, ...) size x y and other misc input params
1929  * I've no idea if this parameters are right
1930  *
1931  */
1932 int usbvision_set_input(struct usb_usbvision *usbvision)
1933 {
1934         static const char proc[] = "usbvision_set_input: ";
1935         int rc;
1936         unsigned char *value = usbvision->ctrl_urb_buffer;
1937         unsigned char dvi_yuv_value;
1938
1939         if (!USBVISION_IS_OPERATIONAL(usbvision))
1940                 return 0;
1941
1942         /* Set input format expected from decoder*/
1943         if (usbvision_device_data[usbvision->dev_model].vin_reg1_override) {
1944                 value[0] = usbvision_device_data[usbvision->dev_model].vin_reg1;
1945         } else if (usbvision_device_data[usbvision->dev_model].codec == CODEC_SAA7113) {
1946                 /* SAA7113 uses 8 bit output */
1947                 value[0] = USBVISION_8_422_SYNC;
1948         } else {
1949                 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
1950                  * as that is how saa7111 is configured */
1951                 value[0] = USBVISION_16_422_SYNC;
1952                 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
1953         }
1954
1955         rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
1956         if (rc < 0) {
1957                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
1958                        proc, rc);
1959                 return rc;
1960         }
1961
1962
1963         if (usbvision->tvnorm_id & V4L2_STD_PAL) {
1964                 value[0] = 0xC0;
1965                 value[1] = 0x02;        /* 0x02C0 -> 704 Input video line length */
1966                 value[2] = 0x20;
1967                 value[3] = 0x01;        /* 0x0120 -> 288 Input video n. of lines */
1968                 value[4] = 0x60;
1969                 value[5] = 0x00;        /* 0x0060 -> 96 Input video h offset */
1970                 value[6] = 0x16;
1971                 value[7] = 0x00;        /* 0x0016 -> 22 Input video v offset */
1972         } else if (usbvision->tvnorm_id & V4L2_STD_SECAM) {
1973                 value[0] = 0xC0;
1974                 value[1] = 0x02;        /* 0x02C0 -> 704 Input video line length */
1975                 value[2] = 0x20;
1976                 value[3] = 0x01;        /* 0x0120 -> 288 Input video n. of lines */
1977                 value[4] = 0x01;
1978                 value[5] = 0x00;        /* 0x0001 -> 01 Input video h offset */
1979                 value[6] = 0x01;
1980                 value[7] = 0x00;        /* 0x0001 -> 01 Input video v offset */
1981         } else {        /* V4L2_STD_NTSC */
1982                 value[0] = 0xD0;
1983                 value[1] = 0x02;        /* 0x02D0 -> 720 Input video line length */
1984                 value[2] = 0xF0;
1985                 value[3] = 0x00;        /* 0x00F0 -> 240 Input video number of lines */
1986                 value[4] = 0x50;
1987                 value[5] = 0x00;        /* 0x0050 -> 80 Input video h offset */
1988                 value[6] = 0x10;
1989                 value[7] = 0x00;        /* 0x0010 -> 16 Input video v offset */
1990         }
1991
1992         /* webcam is only 480 pixels wide, both PAL and NTSC version */
1993         if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
1994                 value[0] = 0xe0;
1995                 value[1] = 0x01;        /* 0x01E0 -> 480 Input video line length */
1996         }
1997
1998         if (usbvision_device_data[usbvision->dev_model].x_offset >= 0) {
1999                 value[4] = usbvision_device_data[usbvision->dev_model].x_offset & 0xff;
2000                 value[5] = (usbvision_device_data[usbvision->dev_model].x_offset & 0x0300) >> 8;
2001         }
2002
2003         if (adjust_x_offset != -1) {
2004                 value[4] = adjust_x_offset & 0xff;
2005                 value[5] = (adjust_x_offset & 0x0300) >> 8;
2006         }
2007
2008         if (usbvision_device_data[usbvision->dev_model].y_offset >= 0) {
2009                 value[6] = usbvision_device_data[usbvision->dev_model].y_offset & 0xff;
2010                 value[7] = (usbvision_device_data[usbvision->dev_model].y_offset & 0x0300) >> 8;
2011         }
2012
2013         if (adjust_y_offset != -1) {
2014                 value[6] = adjust_y_offset & 0xff;
2015                 value[7] = (adjust_y_offset & 0x0300) >> 8;
2016         }
2017
2018         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2019                              USBVISION_OP_CODE, /* USBVISION specific code */
2020                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2021                              (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2022         if (rc < 0) {
2023                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
2024                        proc, rc);
2025                 return rc;
2026         }
2027
2028
2029         dvi_yuv_value = 0x00;   /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2030
2031         if (usbvision_device_data[usbvision->dev_model].dvi_yuv_override) {
2032                 dvi_yuv_value = usbvision_device_data[usbvision->dev_model].dvi_yuv;
2033         } else if (usbvision_device_data[usbvision->dev_model].codec == CODEC_SAA7113) {
2034                 /* This changes as the fine sync control changes. Further investigation necessary */
2035                 dvi_yuv_value = 0x06;
2036         }
2037
2038         return usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value);
2039 }
2040
2041
2042 /*
2043  * usbvision_set_dram_settings()
2044  *
2045  * Set the buffer address needed by the usbvision dram to operate
2046  * This values has been taken with usbsnoop.
2047  *
2048  */
2049
2050 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2051 {
2052         unsigned char *value = usbvision->ctrl_urb_buffer;
2053         int rc;
2054
2055         if (usbvision->isoc_mode == ISOC_MODE_COMPRESS) {
2056                 value[0] = 0x42;
2057                 value[1] = 0x71;
2058                 value[2] = 0xff;
2059                 value[3] = 0x00;
2060                 value[4] = 0x98;
2061                 value[5] = 0xe0;
2062                 value[6] = 0x71;
2063                 value[7] = 0xff;
2064                 /* UR:  0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte) */
2065                 /* FDL: 0x00000-0x0E099 =  57498 Words */
2066                 /* VDW: 0x0E3FF-0x3FFFF */
2067         } else {
2068                 value[0] = 0x42;
2069                 value[1] = 0x00;
2070                 value[2] = 0xff;
2071                 value[3] = 0x00;
2072                 value[4] = 0x00;
2073                 value[5] = 0x00;
2074                 value[6] = 0x00;
2075                 value[7] = 0xff;
2076         }
2077         /* These are the values of the address of the video buffer,
2078          * they have to be loaded into the USBVISION_DRM_PRM1-8
2079          *
2080          * Start address of video output buffer for read:       drm_prm1-2 -> 0x00000
2081          * End address of video output buffer for read:         drm_prm1-3 -> 0x1ffff
2082          * Start address of video frame delay buffer:           drm_prm1-4 -> 0x20000
2083          *    Only used in compressed mode
2084          * End address of video frame delay buffer:             drm_prm1-5-6 -> 0x3ffff
2085          *    Only used in compressed mode
2086          * Start address of video output buffer for write:      drm_prm1-7 -> 0x00000
2087          * End address of video output buffer for write:        drm_prm1-8 -> 0x1ffff
2088          */
2089
2090         if (!USBVISION_IS_OPERATIONAL(usbvision))
2091                 return 0;
2092
2093         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2094                              USBVISION_OP_CODE, /* USBVISION specific code */
2095                              USB_DIR_OUT | USB_TYPE_VENDOR |
2096                              USB_RECIP_ENDPOINT, 0,
2097                              (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2098
2099         if (rc < 0) {
2100                 dev_err(&usbvision->dev->dev, "%s: ERROR=%d\n", __func__, rc);
2101                 return rc;
2102         }
2103
2104         /* Restart the video buffer logic */
2105         rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2106                                    USBVISION_RES_FDL | USBVISION_RES_VDW);
2107         if (rc < 0)
2108                 return rc;
2109         rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2110
2111         return rc;
2112 }
2113
2114 /*
2115  * ()
2116  *
2117  * Power on the device, enables suspend-resume logic
2118  * &  reset the isoc End-Point
2119  *
2120  */
2121
2122 int usbvision_power_on(struct usb_usbvision *usbvision)
2123 {
2124         int err_code = 0;
2125
2126         PDEBUG(DBG_FUNC, "");
2127
2128         usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2129         usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2130                         USBVISION_SSPND_EN | USBVISION_RES2);
2131
2132         if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
2133                 usbvision_write_reg(usbvision, USBVISION_VIN_REG1,
2134                                 USBVISION_16_422_SYNC | USBVISION_HVALID_PO);
2135                 usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2136                                 USBVISION_NOHVALID | USBVISION_KEEP_BLANK);
2137         }
2138         usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2139                         USBVISION_SSPND_EN | USBVISION_PWR_VID);
2140         mdelay(10);
2141         err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2142                         USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2143         if (err_code == 1)
2144                 usbvision->power = 1;
2145         PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code < 0) ? "ERROR" : "power is on", err_code);
2146         return err_code;
2147 }
2148
2149
2150 /*
2151  * usbvision_begin_streaming()
2152  * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2153  * idea about the rest
2154  */
2155 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2156 {
2157         if (usbvision->isoc_mode == ISOC_MODE_COMPRESS)
2158                 usbvision_init_compression(usbvision);
2159         return usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2160                 USBVISION_NOHVALID | usbvision->vin_reg2_preset);
2161 }
2162
2163 /*
2164  * usbvision_restart_isoc()
2165  * Not sure yet if touching here PWR_REG make loose the config
2166  */
2167
2168 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2169 {
2170         int ret;
2171
2172         ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2173                               USBVISION_SSPND_EN | USBVISION_PWR_VID);
2174         if (ret < 0)
2175                 return ret;
2176         ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2177                               USBVISION_SSPND_EN | USBVISION_PWR_VID |
2178                               USBVISION_RES2);
2179         if (ret < 0)
2180                 return ret;
2181         ret = usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2182                               USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2183                                   usbvision->vin_reg2_preset);
2184         if (ret < 0)
2185                 return ret;
2186
2187         /* TODO: schedule timeout */
2188         while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1)
2189                 ;
2190
2191         return 0;
2192 }
2193
2194 int usbvision_audio_off(struct usb_usbvision *usbvision)
2195 {
2196         if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2197                 printk(KERN_ERR "usbvision_audio_off: can't write reg\n");
2198                 return -1;
2199         }
2200         usbvision->audio_mute = 0;
2201         usbvision->audio_channel = USBVISION_AUDIO_MUTE;
2202         return 0;
2203 }
2204
2205 int usbvision_set_audio(struct usb_usbvision *usbvision, int audio_channel)
2206 {
2207         if (!usbvision->audio_mute) {
2208                 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, audio_channel) < 0) {
2209                         printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2210                         return -1;
2211                 }
2212         }
2213         usbvision->audio_channel = audio_channel;
2214         return 0;
2215 }
2216
2217 int usbvision_setup(struct usb_usbvision *usbvision, int format)
2218 {
2219         if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM)
2220                 usbvision_init_webcam(usbvision);
2221         usbvision_set_video_format(usbvision, format);
2222         usbvision_set_dram_settings(usbvision);
2223         usbvision_set_compress_params(usbvision);
2224         usbvision_set_input(usbvision);
2225         usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2226         usbvision_restart_isoc(usbvision);
2227
2228         /* cosas del PCM */
2229         return USBVISION_IS_OPERATIONAL(usbvision);
2230 }
2231
2232 int usbvision_set_alternate(struct usb_usbvision *dev)
2233 {
2234         int err_code, prev_alt = dev->iface_alt;
2235         int i;
2236
2237         dev->iface_alt = 0;
2238         for (i = 0; i < dev->num_alt; i++)
2239                 if (dev->alt_max_pkt_size[i] > dev->alt_max_pkt_size[dev->iface_alt])
2240                         dev->iface_alt = i;
2241
2242         if (dev->iface_alt != prev_alt) {
2243                 dev->isoc_packet_size = dev->alt_max_pkt_size[dev->iface_alt];
2244                 PDEBUG(DBG_FUNC, "setting alternate %d with max_packet_size=%u",
2245                                 dev->iface_alt, dev->isoc_packet_size);
2246                 err_code = usb_set_interface(dev->dev, dev->iface, dev->iface_alt);
2247                 if (err_code < 0) {
2248                         dev_err(&dev->dev->dev,
2249                                 "cannot change alternate number to %d (error=%i)\n",
2250                                         dev->iface_alt, err_code);
2251                         return err_code;
2252                 }
2253         }
2254
2255         PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isoc_packet_size);
2256
2257         return 0;
2258 }
2259
2260 /*
2261  * usbvision_init_isoc()
2262  *
2263  */
2264 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2265 {
2266         struct usb_device *dev = usbvision->dev;
2267         int buf_idx, err_code, reg_value;
2268         int sb_size;
2269
2270         if (!USBVISION_IS_OPERATIONAL(usbvision))
2271                 return -EFAULT;
2272
2273         usbvision->cur_frame = NULL;
2274         scratch_reset(usbvision);
2275
2276         /* Alternate interface 1 is is the biggest frame size */
2277         err_code = usbvision_set_alternate(usbvision);
2278         if (err_code < 0) {
2279                 usbvision->last_error = err_code;
2280                 return -EBUSY;
2281         }
2282         sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size;
2283
2284         reg_value = (16 - usbvision_read_reg(usbvision,
2285                                             USBVISION_ALTER_REG)) & 0x0F;
2286
2287         usbvision->usb_bandwidth = reg_value >> 1;
2288         PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2289                usbvision->usb_bandwidth);
2290
2291
2292
2293         /* We double buffer the Iso lists */
2294
2295         for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2296                 int j, k;
2297                 struct urb *urb;
2298
2299                 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2300                 if (urb == NULL)
2301                         return -ENOMEM;
2302                 usbvision->sbuf[buf_idx].urb = urb;
2303                 usbvision->sbuf[buf_idx].data =
2304                         usb_alloc_coherent(usbvision->dev,
2305                                            sb_size,
2306                                            GFP_KERNEL,
2307                                            &urb->transfer_dma);
2308                 urb->dev = dev;
2309                 urb->context = usbvision;
2310                 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2311                 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
2312                 urb->interval = 1;
2313                 urb->transfer_buffer = usbvision->sbuf[buf_idx].data;
2314                 urb->complete = usbvision_isoc_irq;
2315                 urb->number_of_packets = USBVISION_URB_FRAMES;
2316                 urb->transfer_buffer_length =
2317                     usbvision->isoc_packet_size * USBVISION_URB_FRAMES;
2318                 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2319                      k += usbvision->isoc_packet_size) {
2320                         urb->iso_frame_desc[j].offset = k;
2321                         urb->iso_frame_desc[j].length =
2322                                 usbvision->isoc_packet_size;
2323                 }
2324         }
2325
2326         /* Submit all URBs */
2327         for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2328                 err_code = usb_submit_urb(usbvision->sbuf[buf_idx].urb,
2329                                          GFP_KERNEL);
2330                 if (err_code) {
2331                         dev_err(&usbvision->dev->dev,
2332                                 "%s: usb_submit_urb(%d) failed: error %d\n",
2333                                         __func__, buf_idx, err_code);
2334                 }
2335         }
2336
2337         usbvision->streaming = stream_idle;
2338         PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x",
2339                __func__,
2340                usbvision->video_endp);
2341         return 0;
2342 }
2343
2344 /*
2345  * usbvision_stop_isoc()
2346  *
2347  * This procedure stops streaming and deallocates URBs. Then it
2348  * activates zero-bandwidth alt. setting of the video interface.
2349  *
2350  */
2351 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2352 {
2353         int buf_idx, err_code, reg_value;
2354         int sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size;
2355
2356         if ((usbvision->streaming == stream_off) || (usbvision->dev == NULL))
2357                 return;
2358
2359         /* Unschedule all of the iso td's */
2360         for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2361                 usb_kill_urb(usbvision->sbuf[buf_idx].urb);
2362                 if (usbvision->sbuf[buf_idx].data) {
2363                         usb_free_coherent(usbvision->dev,
2364                                           sb_size,
2365                                           usbvision->sbuf[buf_idx].data,
2366                                           usbvision->sbuf[buf_idx].urb->transfer_dma);
2367                 }
2368                 usb_free_urb(usbvision->sbuf[buf_idx].urb);
2369                 usbvision->sbuf[buf_idx].urb = NULL;
2370         }
2371
2372         PDEBUG(DBG_ISOC, "%s: streaming=stream_off\n", __func__);
2373         usbvision->streaming = stream_off;
2374
2375         if (!usbvision->remove_pending) {
2376                 /* Set packet size to 0 */
2377                 usbvision->iface_alt = 0;
2378                 err_code = usb_set_interface(usbvision->dev, usbvision->iface,
2379                                             usbvision->iface_alt);
2380                 if (err_code < 0) {
2381                         dev_err(&usbvision->dev->dev,
2382                                 "%s: usb_set_interface() failed: error %d\n",
2383                                         __func__, err_code);
2384                         usbvision->last_error = err_code;
2385                 }
2386                 reg_value = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2387                 usbvision->isoc_packet_size =
2388                         (reg_value == 0) ? 0 : (reg_value * 64) - 1;
2389                 PDEBUG(DBG_ISOC, "ISO Packet Length:%d",
2390                        usbvision->isoc_packet_size);
2391
2392                 usbvision->usb_bandwidth = reg_value >> 1;
2393                 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2394                        usbvision->usb_bandwidth);
2395         }
2396 }
2397
2398 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2399 {
2400         /* inputs #0 and #3 are constant for every SAA711x. */
2401         /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */
2402         int mode[4] = { SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3 };
2403         int audio[] = { 1, 0, 0, 0 };
2404         /* channel 0 is TV with audiochannel 1 (tuner mono) */
2405         /* channel 1 is Composite with audio channel 0 (line in) */
2406         /* channel 2 is S-Video with audio channel 0 (line in) */
2407         /* channel 3 is additional video inputs to the device with audio channel 0 (line in) */
2408
2409         RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2410         usbvision->ctl_input = channel;
2411
2412         /* set the new channel */
2413         /* Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video */
2414         /* Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red */
2415
2416         switch (usbvision_device_data[usbvision->dev_model].codec) {
2417         case CODEC_SAA7113:
2418                 mode[1] = SAA7115_COMPOSITE2;
2419                 if (switch_svideo_input) {
2420                         /* To handle problems with S-Video Input for
2421                          * some devices.  Use switch_svideo_input
2422                          * parameter when loading the module.*/
2423                         mode[2] = SAA7115_COMPOSITE1;
2424                 } else {
2425                         mode[2] = SAA7115_SVIDEO1;
2426                 }
2427                 break;
2428         case CODEC_SAA7111:
2429         default:
2430                 /* modes for saa7111 */
2431                 mode[1] = SAA7115_COMPOSITE1;
2432                 mode[2] = SAA7115_SVIDEO1;
2433                 break;
2434         }
2435         call_all(usbvision, video, s_routing, mode[channel], 0, 0);
2436         usbvision_set_audio(usbvision, audio[channel]);
2437         return 0;
2438 }