drivers/usb/media/se401.c

   1 /*
   2  * Endpoints (formerly known as AOX) se401 USB Camera Driver
   3  *
   4  * Copyright (c) 2000 Jeroen B. Vreeken (pe1rxq@amsat.org)
   5  *
   6  * Still somewhat based on the Linux ov511 driver.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2 of the License, or (at your
  11  * option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16  * for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software Foundation,
  20  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  *
  23  * Thanks to Endpoints Inc. (www.endpoints.com) for making documentation on
  24  * their chipset available and supporting me while writing this driver.
  25  *      - Jeroen Vreeken
  26  */
  27
  28 static const char version[] = "0.24";
  29
  30 #include <linux/config.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/slab.h>
  35 #include <linux/pagemap.h>
  36 #include <linux/usb.h>
  37 #include "se401.h"
  38
  39 static int flickerless=0;
  40 static int video_nr = -1;
  41
  42 static struct usb_device_id device_table [] = {
  43         { USB_DEVICE(0x03e8, 0x0004) },/* Endpoints/Aox SE401 */
  44         { USB_DEVICE(0x0471, 0x030b) },/* Philips PCVC665K */
  45         { USB_DEVICE(0x047d, 0x5001) },/* Kensington 67014 */
  46         { USB_DEVICE(0x047d, 0x5002) },/* Kensington 6701(5/7) */
  47         { USB_DEVICE(0x047d, 0x5003) },/* Kensington 67016 */
  48         { }
  49 };
  50
  51 MODULE_DEVICE_TABLE(usb, device_table);
  52
  53 MODULE_AUTHOR("Jeroen Vreeken <pe1rxq@amsat.org>");
  54 MODULE_DESCRIPTION("SE401 USB Camera Driver");
  55 MODULE_LICENSE("GPL");
  56 module_param(flickerless, int, 0);
  57 MODULE_PARM_DESC(flickerless, "Net frequency to adjust exposure time to (0/50/60)");
  58 module_param(video_nr, int, 0);
  59
  60 static struct usb_driver se401_driver;
  61
  62
  63 /**********************************************************************
  64  *
  65  * Memory management
  66  *
  67  **********************************************************************/
  68 static void *rvmalloc(unsigned long size)
  69 {
  70         void *mem;
  71         unsigned long adr;
  72
  73         size = PAGE_ALIGN(size);
  74         mem = vmalloc_32(size);
  75         if (!mem)
  76                 return NULL;
  77
  78         memset(mem, 0, size); /* Clear the ram out, no junk to the user */
  79         adr = (unsigned long) mem;
  80         while (size > 0) {
  81                 SetPageReserved(vmalloc_to_page((void *)adr));
  82                 adr += PAGE_SIZE;
  83                 size -= PAGE_SIZE;
  84         }
  85
  86         return mem;
  87 }
  88
  89 static void rvfree(void *mem, unsigned long size)
  90 {
  91         unsigned long adr;
  92
  93         if (!mem)
  94                 return;
  95
  96         adr = (unsigned long) mem;
  97         while ((long) size > 0) {
  98                 ClearPageReserved(vmalloc_to_page((void *)adr));
  99                 adr += PAGE_SIZE;
 100                 size -= PAGE_SIZE;
 101         }
 102         vfree(mem);
 103 }
 104
 105
 106
 107 /****************************************************************************
 108  *
 109  * se401 register read/write functions
 110  *
 111  ***************************************************************************/
 112
 113 static int se401_sndctrl(int set, struct usb_se401 *se401, unsigned short req,
 114                          unsigned short value, unsigned char *cp, int size)
 115 {
 116         return usb_control_msg (
 117                 se401->dev,
 118                 set ? usb_sndctrlpipe(se401->dev, 0) : usb_rcvctrlpipe(se401->dev, 0),
 119                 req,
 120                 (set ? USB_DIR_OUT : USB_DIR_IN) | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 121                 value,
 122                 0,
 123                 cp,
 124                 size,
 125                 1000
 126         );
 127 }
 128
 129 static int se401_set_feature(struct usb_se401 *se401, unsigned short selector,
 130                              unsigned short param)
 131 {
 132         /* specs say that the selector (address) should go in the value field
 133            and the param in index, but in the logs of the windows driver they do
 134            this the other way around...
 135          */
 136         return usb_control_msg (
 137                 se401->dev,
 138                 usb_sndctrlpipe(se401->dev, 0),
 139                 SE401_REQ_SET_EXT_FEATURE,
 140                 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 141                 param,
 142                 selector,
 143                 NULL,
 144                 0,
 145                 1000
 146         );
 147 }
 148
 149 static unsigned short se401_get_feature(struct usb_se401 *se401,
 150                                         unsigned short selector)
 151 {
 152         /* For 'set' the selecetor should be in index, not sure if the spec is
 153            wrong here to....
 154          */
 155         unsigned char cp[2];
 156         usb_control_msg (
 157                 se401->dev,
 158                 usb_rcvctrlpipe(se401->dev, 0),
 159                 SE401_REQ_GET_EXT_FEATURE,
 160                 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 161                 0,
 162                 selector,
 163                 cp,
 164                 2,
 165                 1000
 166         );
 167         return cp[0]+cp[1]*256;
 168 }
 169
 170 /****************************************************************************
 171  *
 172  * Camera control
 173  *
 174  ***************************************************************************/
 175
 176
 177 static int se401_send_pict(struct usb_se401 *se401)
 178 {
 179         se401_set_feature(se401, HV7131_REG_TITL, se401->expose_l);/* integration time low */
 180         se401_set_feature(se401, HV7131_REG_TITM, se401->expose_m);/* integration time mid */
 181         se401_set_feature(se401, HV7131_REG_TITU, se401->expose_h);/* integration time mid */
 182         se401_set_feature(se401, HV7131_REG_ARLV, se401->resetlevel);/* reset level value */
 183         se401_set_feature(se401, HV7131_REG_ARCG, se401->rgain);/* red color gain */
 184         se401_set_feature(se401, HV7131_REG_AGCG, se401->ggain);/* green color gain */
 185         se401_set_feature(se401, HV7131_REG_ABCG, se401->bgain);/* blue color gain */
 186
 187         return 0;
 188 }
 189
 190 static void se401_set_exposure(struct usb_se401 *se401, int brightness)
 191 {
 192         int integration=brightness<<5;
 193
 194         if (flickerless==50) {
 195                 integration=integration-integration%106667;
 196         }
 197         if (flickerless==60) {
 198                 integration=integration-integration%88889;
 199         }
 200         se401->brightness=integration>>5;
 201         se401->expose_h=(integration>>16)&0xff;
 202         se401->expose_m=(integration>>8)&0xff;
 203         se401->expose_l=integration&0xff;
 204 }
 205
 206 static int se401_get_pict(struct usb_se401 *se401, struct video_picture *p)
 207 {
 208         p->brightness=se401->brightness;
 209         if (se401->enhance) {
 210                 p->whiteness=32768;
 211         } else {
 212                 p->whiteness=0;
 213         }
 214         p->colour=65535;
 215         p->contrast=65535;
 216         p->hue=se401->rgain<<10;
 217         p->palette=se401->palette;
 218         p->depth=3; /* rgb24 */
 219         return 0;
 220 }
 221
 222
 223 static int se401_set_pict(struct usb_se401 *se401, struct video_picture *p)
 224 {
 225         if (p->palette != VIDEO_PALETTE_RGB24)
 226                 return 1;
 227         se401->palette=p->palette;
 228         if (p->hue!=se401->hue) {
 229                 se401->rgain= p->hue>>10;
 230                 se401->bgain= 0x40-(p->hue>>10);
 231                 se401->hue=p->hue;
 232         }
 233         if (p->brightness!=se401->brightness) {
 234                 se401_set_exposure(se401, p->brightness);
 235         }
 236         if (p->whiteness>=32768) {
 237                 se401->enhance=1;
 238         } else {
 239                 se401->enhance=0;
 240         }
 241         se401_send_pict(se401);
 242         se401_send_pict(se401);
 243         return 0;
 244 }
 245
 246 /*
 247         Hyundai have some really nice docs about this and other sensor related
 248         stuff on their homepage: www.hei.co.kr
 249 */
 250 static void se401_auto_resetlevel(struct usb_se401 *se401)
 251 {
 252         unsigned int ahrc, alrc;
 253         int oldreset=se401->resetlevel;
 254
 255         /* For some reason this normally read-only register doesn't get reset
 256            to zero after reading them just once...
 257          */
 258         se401_get_feature(se401, HV7131_REG_HIREFNOH);
 259         se401_get_feature(se401, HV7131_REG_HIREFNOL);
 260         se401_get_feature(se401, HV7131_REG_LOREFNOH);
 261         se401_get_feature(se401, HV7131_REG_LOREFNOL);
 262         ahrc=256*se401_get_feature(se401, HV7131_REG_HIREFNOH) +
 263             se401_get_feature(se401, HV7131_REG_HIREFNOL);
 264         alrc=256*se401_get_feature(se401, HV7131_REG_LOREFNOH) +
 265             se401_get_feature(se401, HV7131_REG_LOREFNOL);
 266
 267         /* Not an exact science, but it seems to work pretty well... */
 268         if (alrc > 10) {
 269                 while (alrc>=10 && se401->resetlevel < 63) {
 270                         se401->resetlevel++;
 271                         alrc /=2;
 272                 }
 273         } else if (ahrc > 20) {
 274                 while (ahrc>=20 && se401->resetlevel > 0) {
 275                         se401->resetlevel--;
 276                         ahrc /=2;
 277                 }
 278         }
 279         if (se401->resetlevel!=oldreset)
 280                 se401_set_feature(se401, HV7131_REG_ARLV, se401->resetlevel);
 281
 282         return;
 283 }
 284
 285 /* irq handler for snapshot button */
 286 static void se401_button_irq(struct urb *urb, struct pt_regs *regs)
 287 {
 288         struct usb_se401 *se401 = urb->context;
 289         int status;
 290
 291         if (!se401->dev) {
 292                 info("ohoh: device vapourished");
 293                 return;
 294         }
 295
 296         switch (urb->status) {
 297         case 0:
 298                 /* success */
 299                 break;
 300         case -ECONNRESET:
 301         case -ENOENT:
 302         case -ESHUTDOWN:
 303                 /* this urb is terminated, clean up */
 304                 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
 305                 return;
 306         default:
 307                 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
 308                 goto exit;
 309         }
 310
 311         if (urb->actual_length >=2) {
 312                 if (se401->button)
 313                         se401->buttonpressed=1;
 314         }
 315 exit:
 316         status = usb_submit_urb (urb, GFP_ATOMIC);
 317         if (status)
 318                 err ("%s - usb_submit_urb failed with result %d",
 319                      __FUNCTION__, status);
 320 }
 321
 322 static void se401_video_irq(struct urb *urb, struct pt_regs *regs)
 323 {
 324         struct usb_se401 *se401 = urb->context;
 325         int length = urb->actual_length;
 326
 327         /* ohoh... */
 328         if (!se401->streaming)
 329                 return;
 330
 331         if (!se401->dev) {
 332                 info ("ohoh: device vapourished");
 333                 return;
 334         }
 335
 336         /* 0 sized packets happen if we are to fast, but sometimes the camera
 337            keeps sending them forever...
 338          */
 339         if (length && !urb->status) {
 340                 se401->nullpackets=0;
 341                 switch(se401->scratch[se401->scratch_next].state) {
 342                         case BUFFER_READY:
 343                         case BUFFER_BUSY: {
 344                                 se401->dropped++;
 345                                 break;
 346                         }
 347                         case BUFFER_UNUSED: {
 348                                 memcpy(se401->scratch[se401->scratch_next].data, (unsigned char *)urb->transfer_buffer, length);
 349                                 se401->scratch[se401->scratch_next].state=BUFFER_READY;
 350                                 se401->scratch[se401->scratch_next].offset=se401->bayeroffset;
 351                                 se401->scratch[se401->scratch_next].length=length;
 352                                 if (waitqueue_active(&se401->wq)) {
 353                                         wake_up_interruptible(&se401->wq);
 354                                 }
 355                                 se401->scratch_overflow=0;
 356                                 se401->scratch_next++;
 357                                 if (se401->scratch_next>=SE401_NUMSCRATCH)
 358                                         se401->scratch_next=0;
 359                                 break;
 360                         }
 361                 }
 362                 se401->bayeroffset+=length;
 363                 if (se401->bayeroffset>=se401->cheight*se401->cwidth) {
 364                         se401->bayeroffset=0;
 365                 }
 366         } else {
 367                 se401->nullpackets++;
 368                 if (se401->nullpackets > SE401_MAX_NULLPACKETS) {
 369                         if (waitqueue_active(&se401->wq)) {
 370                                 wake_up_interruptible(&se401->wq);
 371                         }
 372                 }
 373         }
 374
 375         /* Resubmit urb for new data */
 376         urb->status=0;
 377         urb->dev=se401->dev;
 378         if(usb_submit_urb(urb, GFP_KERNEL))
 379                 info("urb burned down");
 380         return;
 381 }
 382
 383 static void se401_send_size(struct usb_se401 *se401, int width, int height)
 384 {
 385         int i=0;
 386         int mode=0x03; /* No compression */
 387         int sendheight=height;
 388         int sendwidth=width;
 389
 390         /* JangGu compression can only be used with the camera supported sizes,
 391            but bayer seems to work with any size that fits on the sensor.
 392            We check if we can use compression with the current size with either
 393            4 or 16 times subcapturing, if not we use uncompressed bayer data
 394            but this will result in cutouts of the maximum size....
 395          */
 396         while (i<se401->sizes && !(se401->width[i]==width && se401->height[i]==height))
 397                 i++;
 398         while (i<se401->sizes) {
 399                 if (se401->width[i]==width*2 && se401->height[i]==height*2) {
 400                         sendheight=se401->height[i];
 401                         sendwidth=se401->width[i];
 402                         mode=0x40;
 403                 }
 404                 if (se401->width[i]==width*4 && se401->height[i]==height*4) {
 405                         sendheight=se401->height[i];
 406                         sendwidth=se401->width[i];
 407                         mode=0x42;
 408                 }
 409                 i++;
 410         }
 411
 412         se401_sndctrl(1, se401, SE401_REQ_SET_WIDTH, sendwidth, NULL, 0);
 413         se401_sndctrl(1, se401, SE401_REQ_SET_HEIGHT, sendheight, NULL, 0);
 414         se401_set_feature(se401, SE401_OPERATINGMODE, mode);
 415
 416         if (mode==0x03) {
 417                 se401->format=FMT_BAYER;
 418         } else {
 419                 se401->format=FMT_JANGGU;
 420         }
 421
 422         return;
 423 }
 424
 425 /*
 426         In this function se401_send_pict is called several times,
 427         for some reason (depending on the state of the sensor and the phase of
 428         the moon :) doing this only in either place doesn't always work...
 429 */
 430 static int se401_start_stream(struct usb_se401 *se401)
 431 {
 432         struct urb *urb;
 433         int err=0, i;
 434         se401->streaming=1;
 435
 436         se401_sndctrl(1, se401, SE401_REQ_CAMERA_POWER, 1, NULL, 0);
 437         se401_sndctrl(1, se401, SE401_REQ_LED_CONTROL, 1, NULL, 0);
 438
 439         /* Set picture settings */
 440         se401_set_feature(se401, HV7131_REG_MODE_B, 0x05);/*windowed + pix intg */
 441         se401_send_pict(se401);
 442
 443         se401_send_size(se401, se401->cwidth, se401->cheight);
 444
 445         se401_sndctrl(1, se401, SE401_REQ_START_CONTINUOUS_CAPTURE, 0, NULL, 0);
 446
 447         /* Do some memory allocation */
 448         for (i=0; i<SE401_NUMFRAMES; i++) {
 449                 se401->frame[i].data=se401->fbuf + i * se401->maxframesize;
 450                 se401->frame[i].curpix=0;
 451         }
 452         for (i=0; i<SE401_NUMSBUF; i++) {
 453                 se401->sbuf[i].data=kmalloc(SE401_PACKETSIZE, GFP_KERNEL);
 454         }
 455
 456         se401->bayeroffset=0;
 457         se401->scratch_next=0;
 458         se401->scratch_use=0;
 459         se401->scratch_overflow=0;
 460         for (i=0; i<SE401_NUMSCRATCH; i++) {
 461                 se401->scratch[i].data=kmalloc(SE401_PACKETSIZE, GFP_KERNEL);
 462                 se401->scratch[i].state=BUFFER_UNUSED;
 463         }
 464
 465         for (i=0; i<SE401_NUMSBUF; i++) {
 466                 urb=usb_alloc_urb(0, GFP_KERNEL);
 467                 if(!urb)
 468                         return -ENOMEM;
 469
 470                 usb_fill_bulk_urb(urb, se401->dev,
 471                         usb_rcvbulkpipe(se401->dev, SE401_VIDEO_ENDPOINT),
 472                         se401->sbuf[i].data, SE401_PACKETSIZE,
 473                         se401_video_irq,
 474                         se401);
 475
 476                 se401->urb[i]=urb;
 477
 478                 err=usb_submit_urb(se401->urb[i], GFP_KERNEL);
 479                 if(err)
 480                         err("urb burned down");
 481         }
 482
 483         se401->framecount=0;
 484
 485         return 0;
 486 }
 487
 488 static int se401_stop_stream(struct usb_se401 *se401)
 489 {
 490         int i;
 491
 492         if (!se401->streaming || !se401->dev)
 493                 return 1;
 494
 495         se401->streaming=0;
 496
 497         se401_sndctrl(1, se401, SE401_REQ_STOP_CONTINUOUS_CAPTURE, 0, NULL, 0);
 498
 499         se401_sndctrl(1, se401, SE401_REQ_LED_CONTROL, 0, NULL, 0);
 500         se401_sndctrl(1, se401, SE401_REQ_CAMERA_POWER, 0, NULL, 0);
 501
 502         for (i=0; i<SE401_NUMSBUF; i++) if (se401->urb[i]) {
 503                 usb_kill_urb(se401->urb[i]);
 504                 usb_free_urb(se401->urb[i]);
 505                 se401->urb[i]=NULL;
 506                 kfree(se401->sbuf[i].data);
 507         }
 508         for (i=0; i<SE401_NUMSCRATCH; i++) {
 509                 kfree(se401->scratch[i].data);
 510                 se401->scratch[i].data=NULL;
 511         }
 512
 513         return 0;
 514 }
 515
 516 static int se401_set_size(struct usb_se401 *se401, int width, int height)
 517 {
 518         int wasstreaming=se401->streaming;
 519         /* Check to see if we need to change */
 520         if (se401->cwidth==width && se401->cheight==height)
 521                 return 0;
 522
 523         /* Check for a valid mode */
 524         if (!width || !height)
 525                 return 1;
 526         if ((width & 1) || (height & 1))
 527                 return 1;
 528         if (width>se401->width[se401->sizes-1])
 529                 return 1;
 530         if (height>se401->height[se401->sizes-1])
 531                 return 1;
 532
 533         /* Stop a current stream and start it again at the new size */
 534         if (wasstreaming)
 535                 se401_stop_stream(se401);
 536         se401->cwidth=width;
 537         se401->cheight=height;
 538         if (wasstreaming)
 539                 se401_start_stream(se401);
 540         return 0;
 541 }
 542
 543
 544 /****************************************************************************
 545  *
 546  * Video Decoding
 547  *
 548  ***************************************************************************/
 549
 550 /*
 551         This shouldn't really be done in a v4l driver....
 552         But it does make the image look a lot more usable.
 553         Basically it lifts the dark pixels more than the light pixels.
 554 */
 555 static inline void enhance_picture(unsigned char *frame, int len)
 556 {
 557         while (len--) {
 558                 *frame=(((*frame^255)*(*frame^255))/255)^255;
 559                 frame++;
 560         }
 561 }
 562
 563 static inline void decode_JangGu_integrate(struct usb_se401 *se401, int data)
 564 {
 565         struct se401_frame *frame=&se401->frame[se401->curframe];
 566         int linelength=se401->cwidth*3;
 567
 568         if (frame->curlinepix >= linelength) {
 569                 frame->curlinepix=0;
 570                 frame->curline+=linelength;
 571         }
 572
 573         /* First three are absolute, all others relative.
 574          * Format is rgb from right to left (mirrorred image),
 575          * we flip it to get bgr from left to right. */
 576         if (frame->curlinepix < 3) {
 577                 *(frame->curline-frame->curlinepix)=1+data*4;
 578         } else {
 579                 *(frame->curline-frame->curlinepix)=
 580                     *(frame->curline-frame->curlinepix+3)+data*4;
 581         }
 582         frame->curlinepix++;
 583 }
 584
 585 static inline void decode_JangGu_vlc (struct usb_se401 *se401, unsigned char *data, int bit_exp, int packetlength)
 586 {
 587         int pos=0;
 588         int vlc_cod=0;
 589         int vlc_size=0;
 590         int vlc_data=0;
 591         int bit_cur;
 592         int bit;
 593         data+=4;
 594         while (pos < packetlength) {
 595                 bit_cur=8;
 596                 while (bit_cur && bit_exp) {
 597                         bit=((*data)>>(bit_cur-1))&1;
 598                         if (!vlc_cod) {
 599                                 if (bit) {
 600                                         vlc_size++;
 601                                 } else {
 602                                         if (!vlc_size) {
 603                                                 decode_JangGu_integrate(se401, 0);
 604                                         } else {
 605                                                 vlc_cod=2;
 606                                                 vlc_data=0;
 607                                         }
 608                                 }
 609                         } else {
 610                                 if (vlc_cod==2) {
 611                                         if (!bit)
 612                                                 vlc_data =  -(1<<vlc_size) + 1;
 613                                         vlc_cod--;
 614                                 }
 615                                 vlc_size--;
 616                                 vlc_data+=bit<<vlc_size;
 617                                 if (!vlc_size) {
 618                                         decode_JangGu_integrate(se401, vlc_data);
 619                                         vlc_cod=0;
 620                                 }
 621                         }
 622                         bit_cur--;
 623                         bit_exp--;
 624                 }
 625                 pos++;
 626                 data++;
 627         }
 628 }
 629
 630 static inline void decode_JangGu (struct usb_se401 *se401, struct se401_scratch *buffer)
 631 {
 632         unsigned char *data=buffer->data;
 633         int len=buffer->length;
 634         int bit_exp=0, pix_exp=0, frameinfo=0, packetlength=0, size;
 635         int datapos=0;
 636
 637         /* New image? */
 638         if (!se401->frame[se401->curframe].curpix) {
 639                 se401->frame[se401->curframe].curlinepix=0;
 640                 se401->frame[se401->curframe].curline=
 641                     se401->frame[se401->curframe].data+
 642                     se401->cwidth*3-1;
 643                 if (se401->frame[se401->curframe].grabstate==FRAME_READY)
 644                         se401->frame[se401->curframe].grabstate=FRAME_GRABBING;
 645                 se401->vlcdatapos=0;
 646         }
 647         while (datapos < len) {
 648                 size=1024-se401->vlcdatapos;
 649                 if (size+datapos > len)
 650                         size=len-datapos;
 651                 memcpy(se401->vlcdata+se401->vlcdatapos, data+datapos, size);
 652                 se401->vlcdatapos+=size;
 653                 packetlength=0;
 654                 if (se401->vlcdatapos >= 4) {
 655                         bit_exp=se401->vlcdata[3]+(se401->vlcdata[2]<<8);
 656                         pix_exp=se401->vlcdata[1]+((se401->vlcdata[0]&0x3f)<<8);
 657                         frameinfo=se401->vlcdata[0]&0xc0;
 658                         packetlength=((bit_exp+47)>>4)<<1;
 659                         if (packetlength > 1024) {
 660                                 se401->vlcdatapos=0;
 661                                 datapos=len;
 662                                 packetlength=0;
 663                                 se401->error++;
 664                                 se401->frame[se401->curframe].curpix=0;
 665                         }
 666                 }
 667                 if (packetlength && se401->vlcdatapos >= packetlength) {
 668                         decode_JangGu_vlc(se401, se401->vlcdata, bit_exp, packetlength);
 669                         se401->frame[se401->curframe].curpix+=pix_exp*3;
 670                         datapos+=size-(se401->vlcdatapos-packetlength);
 671                         se401->vlcdatapos=0;
 672                         if (se401->frame[se401->curframe].curpix>=se401->cwidth*se401->cheight*3) {
 673                                 if (se401->frame[se401->curframe].curpix==se401->cwidth*se401->cheight*3) {
 674                                         if (se401->frame[se401->curframe].grabstate==FRAME_GRABBING) {
 675                                                 se401->frame[se401->curframe].grabstate=FRAME_DONE;
 676                                                 se401->framecount++;
 677                                                 se401->readcount++;
 678                                         }
 679                                         if (se401->frame[(se401->curframe+1)&(SE401_NUMFRAMES-1)].grabstate==FRAME_READY) {
 680                                                 se401->curframe=(se401->curframe+1) & (SE401_NUMFRAMES-1);
 681                                         }
 682                                 } else {
 683                                         se401->error++;
 684                                 }
 685                                 se401->frame[se401->curframe].curpix=0;
 686                                 datapos=len;
 687                         }
 688                 } else {
 689                         datapos+=size;
 690                 }
 691         }
 692 }
 693
 694 static inline void decode_bayer (struct usb_se401 *se401, struct se401_scratch *buffer)
 695 {
 696         unsigned char *data=buffer->data;
 697         int len=buffer->length;
 698         int offset=buffer->offset;
 699         int datasize=se401->cwidth*se401->cheight;
 700         struct se401_frame *frame=&se401->frame[se401->curframe];
 701
 702         unsigned char *framedata=frame->data, *curline, *nextline;
 703         int width=se401->cwidth;
 704         int blineoffset=0, bline;
 705         int linelength=width*3, i;
 706
 707
 708         if (frame->curpix==0) {
 709                 if (frame->grabstate==FRAME_READY) {
 710                         frame->grabstate=FRAME_GRABBING;
 711                 }
 712                 frame->curline=framedata+linelength;
 713                 frame->curlinepix=0;
 714         }
 715
 716         if (offset!=frame->curpix) {
 717                 /* Regard frame as lost :( */
 718                 frame->curpix=0;
 719                 se401->error++;
 720                 return;
 721         }
 722
 723         /* Check if we have to much data */
 724         if (frame->curpix+len > datasize) {
 725                 len=datasize-frame->curpix;
 726         }
 727         if (se401->cheight%4)
 728                 blineoffset=1;
 729         bline=frame->curpix/se401->cwidth+blineoffset;
 730
 731         curline=frame->curline;
 732         nextline=curline+linelength;
 733         if (nextline >= framedata+datasize*3)
 734                 nextline=curline;
 735         while (len) {
 736                 if (frame->curlinepix>=width) {
 737                         frame->curlinepix-=width;
 738                         bline=frame->curpix/width+blineoffset;
 739                         curline+=linelength*2;
 740                         nextline+=linelength*2;
 741                         if (curline >= framedata+datasize*3) {
 742                                 frame->curlinepix++;
 743                                 curline-=3;
 744                                 nextline-=3;
 745                                 len--;
 746                                 data++;
 747                                 frame->curpix++;
 748                         }
 749                         if (nextline >= framedata+datasize*3)
 750                                 nextline=curline;
 751                 }
 752                 if ((bline&1)) {
 753                         if ((frame->curlinepix&1)) {
 754                                 *(curline+2)=*data;
 755                                 *(curline-1)=*data;
 756                                 *(nextline+2)=*data;
 757                                 *(nextline-1)=*data;
 758                         } else {
 759                                 *(curline+1)=
 760                                         (*(curline+1)+*data)/2;
 761                                 *(curline-2)=
 762                                         (*(curline-2)+*data)/2;
 763                                 *(nextline+1)=*data;
 764                                 *(nextline-2)=*data;
 765                         }
 766                 } else {
 767                         if ((frame->curlinepix&1)) {
 768                                 *(curline+1)=
 769                                         (*(curline+1)+*data)/2;
 770                                 *(curline-2)=
 771                                         (*(curline-2)+*data)/2;
 772                                 *(nextline+1)=*data;
 773                                 *(nextline-2)=*data;
 774                         } else {
 775                                 *curline=*data;
 776                                 *(curline-3)=*data;
 777                                 *nextline=*data;
 778                                 *(nextline-3)=*data;
 779                         }
 780                 }
 781                 frame->curlinepix++;
 782                 curline-=3;
 783                 nextline-=3;
 784                 len--;
 785                 data++;
 786                 frame->curpix++;
 787         }
 788         frame->curline=curline;
 789
 790         if (frame->curpix>=datasize) {
 791                 /* Fix the top line */
 792                 framedata+=linelength;
 793                 for (i=0; i<linelength; i++) {
 794                         framedata--;
 795                         *framedata=*(framedata+linelength);
 796                 }
 797                 /* Fix the left side (green is already present) */
 798                 for (i=0; i<se401->cheight; i++) {
 799                         *framedata=*(framedata+3);
 800                         *(framedata+1)=*(framedata+4);
 801                         *(framedata+2)=*(framedata+5);
 802                         framedata+=linelength;
 803                 }
 804                 frame->curpix=0;
 805                 frame->grabstate=FRAME_DONE;
 806                 se401->framecount++;
 807                 se401->readcount++;
 808                 if (se401->frame[(se401->curframe+1)&(SE401_NUMFRAMES-1)].grabstate==FRAME_READY) {
 809                         se401->curframe=(se401->curframe+1) & (SE401_NUMFRAMES-1);
 810                 }
 811         }
 812 }
 813
 814 static int se401_newframe(struct usb_se401 *se401, int framenr)
 815 {
 816         DECLARE_WAITQUEUE(wait, current);
 817         int errors=0;
 818
 819         while (se401->streaming &&
 820             (se401->frame[framenr].grabstate==FRAME_READY ||
 821              se401->frame[framenr].grabstate==FRAME_GRABBING) ) {
 822                 if(!se401->frame[framenr].curpix) {
 823                         errors++;
 824                 }
 825                 wait_interruptible(
 826                     se401->scratch[se401->scratch_use].state!=BUFFER_READY,
 827                     &se401->wq,
 828                     &wait
 829                 );
 830                 if (se401->nullpackets > SE401_MAX_NULLPACKETS) {
 831                         se401->nullpackets=0;
 832                         info("to many null length packets, restarting capture");
 833                         se401_stop_stream(se401);
 834                         se401_start_stream(se401);
 835                 } else {
 836                         if (se401->scratch[se401->scratch_use].state!=BUFFER_READY) {
 837                                 se401->frame[framenr].grabstate=FRAME_ERROR;
 838                                 return -EIO;
 839                         }
 840                         se401->scratch[se401->scratch_use].state=BUFFER_BUSY;
 841                         if (se401->format==FMT_JANGGU) {
 842                                 decode_JangGu(se401, &se401->scratch[se401->scratch_use]);
 843                         } else {
 844                                 decode_bayer(se401, &se401->scratch[se401->scratch_use]);
 845                         }
 846                         se401->scratch[se401->scratch_use].state=BUFFER_UNUSED;
 847                         se401->scratch_use++;
 848                         if (se401->scratch_use>=SE401_NUMSCRATCH)
 849                                 se401->scratch_use=0;
 850                         if (errors > SE401_MAX_ERRORS) {
 851                                 errors=0;
 852                                 info("to much errors, restarting capture");
 853                                 se401_stop_stream(se401);
 854                                 se401_start_stream(se401);
 855                         }
 856                 }
 857         }
 858
 859         if (se401->frame[framenr].grabstate==FRAME_DONE)
 860                 if (se401->enhance)
 861                         enhance_picture(se401->frame[framenr].data, se401->cheight*se401->cwidth*3);
 862         return 0;
 863 }
 864
 865 static void usb_se401_remove_disconnected (struct usb_se401 *se401)
 866 {
 867         int i;
 868
 869         se401->dev = NULL;
 870
 871         for (i=0; i<SE401_NUMSBUF; i++)
 872                 if (se401->urb[i]) {
 873                         usb_kill_urb(se401->urb[i]);
 874                         usb_free_urb(se401->urb[i]);
 875                         se401->urb[i] = NULL;
 876                         kfree(se401->sbuf[i].data);
 877                 }
 878         for (i=0; i<SE401_NUMSCRATCH; i++) {
 879                 kfree(se401->scratch[i].data);
 880         }
 881         if (se401->inturb) {
 882                 usb_kill_urb(se401->inturb);
 883                 usb_free_urb(se401->inturb);
 884         }
 885         info("%s disconnected", se401->camera_name);
 886
 887         /* Free the memory */
 888         kfree(se401->width);
 889         kfree(se401->height);
 890         kfree(se401);
 891 }
 892
 893
 894
 895 /****************************************************************************
 896  *
 897  * Video4Linux
 898  *
 899  ***************************************************************************/
 900
 901
 902 static int se401_open(struct inode *inode, struct file *file)
 903 {
 904         struct video_device *dev = video_devdata(file);
 905         struct usb_se401 *se401 = (struct usb_se401 *)dev;
 906         int err = 0;
 907
 908         if (se401->user)
 909                 return -EBUSY;
 910         se401->fbuf = rvmalloc(se401->maxframesize * SE401_NUMFRAMES);
 911         if (se401->fbuf)
 912                 file->private_data = dev;
 913         else
 914                 err = -ENOMEM;
 915         se401->user = !err;
 916
 917         return err;
 918 }
 919
 920 static int se401_close(struct inode *inode, struct file *file)
 921 {
 922         struct video_device *dev = file->private_data;
 923         struct usb_se401 *se401 = (struct usb_se401 *)dev;
 924         int i;
 925
 926         rvfree(se401->fbuf, se401->maxframesize * SE401_NUMFRAMES);
 927         if (se401->removed) {
 928                 usb_se401_remove_disconnected(se401);
 929                 info("device unregistered");
 930         } else {
 931                 for (i=0; i<SE401_NUMFRAMES; i++)
 932                         se401->frame[i].grabstate=FRAME_UNUSED;
 933                 if (se401->streaming)
 934                         se401_stop_stream(se401);
 935                 se401->user=0;
 936         }
 937         file->private_data = NULL;
 938         return 0;
 939 }
 940
 941 static int se401_do_ioctl(struct inode *inode, struct file *file,
 942                           unsigned int cmd, void *arg)
 943 {
 944         struct video_device *vdev = file->private_data;
 945         struct usb_se401 *se401 = (struct usb_se401 *)vdev;
 946
 947         if (!se401->dev)
 948                 return -EIO;
 949
 950         switch (cmd) {
 951         case VIDIOCGCAP:
 952         {
 953                 struct video_capability *b = arg;
 954                 strcpy(b->name, se401->camera_name);
 955                 b->type = VID_TYPE_CAPTURE;
 956                 b->channels = 1;
 957                 b->audios = 0;
 958                 b->maxwidth = se401->width[se401->sizes-1];
 959                 b->maxheight = se401->height[se401->sizes-1];
 960                 b->minwidth = se401->width[0];
 961                 b->minheight = se401->height[0];
 962                 return 0;
 963         }
 964         case VIDIOCGCHAN:
 965         {
 966                 struct video_channel *v = arg;
 967
 968                 if (v->channel != 0)
 969                         return -EINVAL;
 970                 v->flags = 0;
 971                 v->tuners = 0;
 972                 v->type = VIDEO_TYPE_CAMERA;
 973                 strcpy(v->name, "Camera");
 974                 return 0;
 975         }
 976         case VIDIOCSCHAN:
 977         {
 978                 struct video_channel *v = arg;
 979
 980                 if (v->channel != 0)
 981                         return -EINVAL;
 982                 return 0;
 983         }
 984         case VIDIOCGPICT:
 985         {
 986                 struct video_picture *p = arg;
 987
 988                 se401_get_pict(se401, p);
 989                 return 0;
 990         }
 991         case VIDIOCSPICT:
 992         {
 993                 struct video_picture *p = arg;
 994
 995                 if (se401_set_pict(se401, p))
 996                         return -EINVAL;
 997                 return 0;
 998         }
 999         case VIDIOCSWIN:
1000         {
1001                 struct video_window *vw = arg;
1002
1003                 if (vw->flags)
1004                         return -EINVAL;
1005                 if (vw->clipcount)
1006                         return -EINVAL;
1007                 if (se401_set_size(se401, vw->width, vw->height))
1008                         return -EINVAL;
1009                 return 0;
1010         }
1011         case VIDIOCGWIN:
1012         {
1013                 struct video_window *vw = arg;
1014
1015                 vw->x = 0;               /* FIXME */
1016                 vw->y = 0;
1017                 vw->chromakey = 0;
1018                 vw->flags = 0;
1019                 vw->clipcount = 0;
1020                 vw->width = se401->cwidth;
1021                 vw->height = se401->cheight;
1022                 return 0;
1023         }
1024         case VIDIOCGMBUF:
1025         {
1026                 struct video_mbuf *vm = arg;
1027                 int i;
1028
1029                 memset(vm, 0, sizeof(*vm));
1030                 vm->size = SE401_NUMFRAMES * se401->maxframesize;
1031                 vm->frames = SE401_NUMFRAMES;
1032                 for (i=0; i<SE401_NUMFRAMES; i++)
1033                         vm->offsets[i] = se401->maxframesize * i;
1034                 return 0;
1035         }
1036         case VIDIOCMCAPTURE:
1037         {
1038                 struct video_mmap *vm = arg;
1039
1040                 if (vm->format != VIDEO_PALETTE_RGB24)
1041                         return -EINVAL;
1042                 if (vm->frame >= SE401_NUMFRAMES)
1043                         return -EINVAL;
1044                 if (se401->frame[vm->frame].grabstate != FRAME_UNUSED)
1045                         return -EBUSY;
1046
1047                 /* Is this according to the v4l spec??? */
1048                 if (se401_set_size(se401, vm->width, vm->height))
1049                         return -EINVAL;
1050                 se401->frame[vm->frame].grabstate=FRAME_READY;
1051
1052                 if (!se401->streaming)
1053                         se401_start_stream(se401);
1054
1055                 /* Set the picture properties */
1056                 if (se401->framecount==0)
1057                         se401_send_pict(se401);
1058                 /* Calibrate the reset level after a few frames. */
1059                 if (se401->framecount%20==1)
1060                         se401_auto_resetlevel(se401);
1061
1062                 return 0;
1063         }
1064         case VIDIOCSYNC:
1065         {
1066                 int *frame = arg;
1067                 int ret=0;
1068
1069                 if(*frame <0 || *frame >= SE401_NUMFRAMES)
1070                         return -EINVAL;
1071
1072                 ret=se401_newframe(se401, *frame);
1073                 se401->frame[*frame].grabstate=FRAME_UNUSED;
1074                 return ret;
1075         }
1076         case VIDIOCGFBUF:
1077         {
1078                 struct video_buffer *vb = arg;
1079
1080                 memset(vb, 0, sizeof(*vb));
1081                 return 0;
1082         }
1083         case VIDIOCKEY:
1084                 return 0;
1085         case VIDIOCCAPTURE:
1086                 return -EINVAL;
1087         case VIDIOCSFBUF:
1088                 return -EINVAL;
1089         case VIDIOCGTUNER:
1090         case VIDIOCSTUNER:
1091                 return -EINVAL;
1092         case VIDIOCGFREQ:
1093         case VIDIOCSFREQ:
1094                 return -EINVAL;
1095         case VIDIOCGAUDIO:
1096         case VIDIOCSAUDIO:
1097                 return -EINVAL;
1098         default:
1099                 return -ENOIOCTLCMD;
1100         } /* end switch */
1101
1102         return 0;
1103 }
1104
1105 static int se401_ioctl(struct inode *inode, struct file *file,
1106                        unsigned int cmd, unsigned long arg)
1107 {
1108         return video_usercopy(inode, file, cmd, arg, se401_do_ioctl);
1109 }
1110
1111 static ssize_t se401_read(struct file *file, char __user *buf,
1112                      size_t count, loff_t *ppos)
1113 {
1114         int realcount=count, ret=0;
1115         struct video_device *dev = file->private_data;
1116         struct usb_se401 *se401 = (struct usb_se401 *)dev;
1117
1118
1119         if (se401->dev == NULL)
1120                 return -EIO;
1121         if (realcount > se401->cwidth*se401->cheight*3)
1122                 realcount=se401->cwidth*se401->cheight*3;
1123
1124         /* Shouldn't happen: */
1125         if (se401->frame[0].grabstate==FRAME_GRABBING)
1126                 return -EBUSY;
1127         se401->frame[0].grabstate=FRAME_READY;
1128         se401->frame[1].grabstate=FRAME_UNUSED;
1129         se401->curframe=0;
1130
1131         if (!se401->streaming)
1132                 se401_start_stream(se401);
1133
1134         /* Set the picture properties */
1135         if (se401->framecount==0)
1136                 se401_send_pict(se401);
1137         /* Calibrate the reset level after a few frames. */
1138         if (se401->framecount%20==1)
1139                 se401_auto_resetlevel(se401);
1140
1141         ret=se401_newframe(se401, 0);
1142
1143         se401->frame[0].grabstate=FRAME_UNUSED;
1144         if (ret)
1145                 return ret;
1146         if (copy_to_user(buf, se401->frame[0].data, realcount))
1147                 return -EFAULT;
1148
1149         return realcount;
1150 }
1151
1152 static int se401_mmap(struct file *file, struct vm_area_struct *vma)
1153 {
1154         struct video_device *dev = file->private_data;
1155         struct usb_se401 *se401 = (struct usb_se401 *)dev;
1156         unsigned long start = vma->vm_start;
1157         unsigned long size  = vma->vm_end-vma->vm_start;
1158         unsigned long page, pos;
1159
1160         down(&se401->lock);
1161
1162         if (se401->dev == NULL) {
1163                 up(&se401->lock);
1164                 return -EIO;
1165         }
1166         if (size > (((SE401_NUMFRAMES * se401->maxframesize) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))) {
1167                 up(&se401->lock);
1168                 return -EINVAL;
1169         }
1170         pos = (unsigned long)se401->fbuf;
1171         while (size > 0) {
1172                 page = vmalloc_to_pfn((void *)pos);
1173                 if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
1174                         up(&se401->lock);
1175                         return -EAGAIN;
1176                 }
1177                 start += PAGE_SIZE;
1178                 pos += PAGE_SIZE;
1179                 if (size > PAGE_SIZE)
1180                         size -= PAGE_SIZE;
1181                 else
1182                         size = 0;
1183         }
1184         up(&se401->lock);
1185
1186         return 0;
1187 }
1188
1189 static struct file_operations se401_fops = {
1190         .owner =        THIS_MODULE,
1191         .open =         se401_open,
1192         .release =      se401_close,
1193         .read =         se401_read,
1194         .mmap =         se401_mmap,
1195         .ioctl =        se401_ioctl,
1196         .llseek =       no_llseek,
1197 };
1198 static struct video_device se401_template = {
1199         .owner =        THIS_MODULE,
1200         .name =         "se401 USB camera",
1201         .type =         VID_TYPE_CAPTURE,
1202         .hardware =     VID_HARDWARE_SE401,
1203         .fops =         &se401_fops,
1204 };
1205
1206
1207
1208 /***************************/
1209 static int se401_init(struct usb_se401 *se401, int button)
1210 {
1211         int i=0, rc;
1212         unsigned char cp[0x40];
1213         char temp[200];
1214
1215         /* led on */
1216         se401_sndctrl(1, se401, SE401_REQ_LED_CONTROL, 1, NULL, 0);
1217
1218         /* get camera descriptor */
1219         rc=se401_sndctrl(0, se401, SE401_REQ_GET_CAMERA_DESCRIPTOR, 0, cp, sizeof(cp));
1220         if (cp[1]!=0x41) {
1221                 err("Wrong descriptor type");
1222                 return 1;
1223         }
1224         sprintf (temp, "ExtraFeatures: %d", cp[3]);
1225
1226         se401->sizes=cp[4]+cp[5]*256;
1227         se401->width=kmalloc(se401->sizes*sizeof(int), GFP_KERNEL);
1228         if (!se401->width)
1229                 return 1;
1230         se401->height=kmalloc(se401->sizes*sizeof(int), GFP_KERNEL);
1231         if (!se401->height) {
1232                 kfree(se401->width);
1233                 return 1;
1234         }
1235         for (i=0; i<se401->sizes; i++) {
1236                     se401->width[i]=cp[6+i*4+0]+cp[6+i*4+1]*256;
1237                     se401->height[i]=cp[6+i*4+2]+cp[6+i*4+3]*256;
1238         }
1239         sprintf (temp, "%s Sizes:", temp);
1240         for (i=0; i<se401->sizes; i++) {
1241                 sprintf(temp, "%s %dx%d", temp, se401->width[i], se401->height[i]);
1242         }
1243         info("%s", temp);
1244         se401->maxframesize=se401->width[se401->sizes-1]*se401->height[se401->sizes-1]*3;
1245
1246         rc=se401_sndctrl(0, se401, SE401_REQ_GET_WIDTH, 0, cp, sizeof(cp));
1247         se401->cwidth=cp[0]+cp[1]*256;
1248         rc=se401_sndctrl(0, se401, SE401_REQ_GET_HEIGHT, 0, cp, sizeof(cp));
1249         se401->cheight=cp[0]+cp[1]*256;
1250
1251         if (!cp[2] && SE401_FORMAT_BAYER) {
1252                 err("Bayer format not supported!");
1253                 return 1;
1254         }
1255         /* set output mode (BAYER) */
1256         se401_sndctrl(1, se401, SE401_REQ_SET_OUTPUT_MODE, SE401_FORMAT_BAYER, NULL, 0);
1257
1258         rc=se401_sndctrl(0, se401, SE401_REQ_GET_BRT, 0, cp, sizeof(cp));
1259         se401->brightness=cp[0]+cp[1]*256;
1260         /* some default values */
1261         se401->resetlevel=0x2d;
1262         se401->rgain=0x20;
1263         se401->ggain=0x20;
1264         se401->bgain=0x20;
1265         se401_set_exposure(se401, 20000);
1266         se401->palette=VIDEO_PALETTE_RGB24;
1267         se401->enhance=1;
1268         se401->dropped=0;
1269         se401->error=0;
1270         se401->framecount=0;
1271         se401->readcount=0;
1272
1273         /* Start interrupt transfers for snapshot button */
1274         if (button) {
1275                 se401->inturb=usb_alloc_urb(0, GFP_KERNEL);
1276                 if (!se401->inturb) {
1277                         info("Allocation of inturb failed");
1278                         return 1;
1279                 }
1280                 usb_fill_int_urb(se401->inturb, se401->dev,
1281                     usb_rcvintpipe(se401->dev, SE401_BUTTON_ENDPOINT),
1282                     &se401->button, sizeof(se401->button),
1283                     se401_button_irq,
1284                     se401,
1285                     8
1286                 );
1287                 if (usb_submit_urb(se401->inturb, GFP_KERNEL)) {
1288                         info("int urb burned down");
1289                         return 1;
1290                 }
1291         } else
1292                 se401->inturb=NULL;
1293
1294         /* Flash the led */
1295         se401_sndctrl(1, se401, SE401_REQ_CAMERA_POWER, 1, NULL, 0);
1296         se401_sndctrl(1, se401, SE401_REQ_LED_CONTROL, 1, NULL, 0);
1297         se401_sndctrl(1, se401, SE401_REQ_CAMERA_POWER, 0, NULL, 0);
1298         se401_sndctrl(1, se401, SE401_REQ_LED_CONTROL, 0, NULL, 0);
1299
1300         return 0;
1301 }
1302
1303 static int se401_probe(struct usb_interface *intf,
1304         const struct usb_device_id *id)
1305 {
1306         struct usb_device *dev = interface_to_usbdev(intf);
1307         struct usb_interface_descriptor *interface;
1308         struct usb_se401 *se401;
1309         char *camera_name=NULL;
1310         int button=1;
1311
1312         /* We don't handle multi-config cameras */
1313         if (dev->descriptor.bNumConfigurations != 1)
1314                 return -ENODEV;
1315
1316         interface = &intf->cur_altsetting->desc;
1317
1318         /* Is it an se401? */
1319         if (le16_to_cpu(dev->descriptor.idVendor) == 0x03e8 &&
1320             le16_to_cpu(dev->descriptor.idProduct) == 0x0004) {
1321                 camera_name="Endpoints/Aox SE401";
1322         } else if (le16_to_cpu(dev->descriptor.idVendor) == 0x0471 &&
1323             le16_to_cpu(dev->descriptor.idProduct) == 0x030b) {
1324                 camera_name="Philips PCVC665K";
1325         } else if (le16_to_cpu(dev->descriptor.idVendor) == 0x047d &&
1326             le16_to_cpu(dev->descriptor.idProduct) == 0x5001) {
1327                 camera_name="Kensington VideoCAM 67014";
1328         } else if (le16_to_cpu(dev->descriptor.idVendor) == 0x047d &&
1329             le16_to_cpu(dev->descriptor.idProduct) == 0x5002) {
1330                 camera_name="Kensington VideoCAM 6701(5/7)";
1331         } else if (le16_to_cpu(dev->descriptor.idVendor) == 0x047d &&
1332             le16_to_cpu(dev->descriptor.idProduct) == 0x5003) {
1333                 camera_name="Kensington VideoCAM 67016";
1334                 button=0;
1335         } else
1336                 return -ENODEV;
1337
1338         /* Checking vendor/product should be enough, but what the hell */
1339         if (interface->bInterfaceClass != 0x00)
1340                 return -ENODEV;
1341         if (interface->bInterfaceSubClass != 0x00)
1342                 return -ENODEV;
1343
1344         /* We found one */
1345         info("SE401 camera found: %s", camera_name);
1346
1347         if ((se401 = kmalloc(sizeof(*se401), GFP_KERNEL)) == NULL) {
1348                 err("couldn't kmalloc se401 struct");
1349                 return -ENOMEM;
1350         }
1351
1352         memset(se401, 0, sizeof(*se401));
1353
1354         se401->dev = dev;
1355         se401->iface = interface->bInterfaceNumber;
1356         se401->camera_name = camera_name;
1357
1358         info("firmware version: %02x", le16_to_cpu(dev->descriptor.bcdDevice) & 255);
1359
1360         if (se401_init(se401, button)) {
1361                 kfree(se401);
1362                 return -EIO;
1363         }
1364
1365         memcpy(&se401->vdev, &se401_template, sizeof(se401_template));
1366         memcpy(se401->vdev.name, se401->camera_name, strlen(se401->camera_name));
1367         init_waitqueue_head(&se401->wq);
1368         init_MUTEX(&se401->lock);
1369         wmb();
1370
1371         if (video_register_device(&se401->vdev, VFL_TYPE_GRABBER, video_nr) == -1) {
1372                 kfree(se401);
1373                 err("video_register_device failed");
1374                 return -EIO;
1375         }
1376         info("registered new video device: video%d", se401->vdev.minor);
1377
1378         usb_set_intfdata (intf, se401);
1379         return 0;
1380 }
1381
1382 static void se401_disconnect(struct usb_interface *intf)
1383 {
1384         struct usb_se401 *se401 = usb_get_intfdata (intf);
1385
1386         usb_set_intfdata (intf, NULL);
1387         if (se401) {
1388                 video_unregister_device(&se401->vdev);
1389                 if (!se401->user){
1390                         usb_se401_remove_disconnected(se401);
1391                 } else {
1392                         se401->frame[0].grabstate = FRAME_ERROR;
1393                         se401->frame[0].grabstate = FRAME_ERROR;
1394
1395                         se401->streaming = 0;
1396
1397                         wake_up_interruptible(&se401->wq);
1398                         se401->removed = 1;
1399                 }
1400         }
1401 }
1402
1403 static struct usb_driver se401_driver = {
1404         .owner          = THIS_MODULE,
1405         .name           = "se401",
1406         .id_table       = device_table,
1407         .probe          = se401_probe,
1408         .disconnect     = se401_disconnect,
1409 };
1410
1411
1412
1413 /****************************************************************************
1414  *
1415  *  Module routines
1416  *
1417  ***************************************************************************/
1418
1419 static int __init usb_se401_init(void)
1420 {
1421         info("SE401 usb camera driver version %s registering", version);
1422         if (flickerless)
1423                 if (flickerless!=50 && flickerless!=60) {
1424                         info("Invallid flickerless value, use 0, 50 or 60.");
1425                         return -1;
1426         }
1427         return usb_register(&se401_driver);
1428 }
1429
1430 static void __exit usb_se401_exit(void)
1431 {
1432         usb_deregister(&se401_driver);
1433         info("SE401 driver deregistered");
1434 }
1435
1436 module_init(usb_se401_init);
1437 module_exit(usb_se401_exit);