drivers/media/video/gspca/tv8532.c

   1 /*
   2  * Quickcam cameras initialization data
   3  *
   4  * V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  *
  20  */
  21 #define MODULE_NAME "tv8532"
  22
  23 #include "gspca.h"
  24
  25 #define DRIVER_VERSION_NUMBER   KERNEL_VERSION(2, 1, 7)
  26 static const char version[] = "2.1.7";
  27
  28 MODULE_AUTHOR("Michel Xhaard <mxhaard@users.sourceforge.net>");
  29 MODULE_DESCRIPTION("TV8532 USB Camera Driver");
  30 MODULE_LICENSE("GPL");
  31
  32 /* specific webcam descriptor */
  33 struct sd {
  34         struct gspca_dev gspca_dev;     /* !! must be the first item */
  35
  36         int buflen;                     /* current length of tmpbuf */
  37         __u8 tmpbuf[352 * 288 + 10 * 288];      /* no protection... */
  38         __u8 tmpbuf2[352 * 288];                /* no protection... */
  39
  40         unsigned short brightness;
  41         unsigned short contrast;
  42
  43         char packet;
  44         char synchro;
  45 };
  46
  47 /* V4L2 controls supported by the driver */
  48 static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val);
  49 static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val);
  50 static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val);
  51 static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val);
  52
  53 static struct ctrl sd_ctrls[] = {
  54 #define SD_BRIGHTNESS 0
  55         {
  56          {
  57           .id = V4L2_CID_BRIGHTNESS,
  58           .type = V4L2_CTRL_TYPE_INTEGER,
  59           .name = "Brightness",
  60           .minimum = 1,
  61           .maximum = 0x2ff,
  62           .step = 1,
  63           .default_value = 0x18f,
  64           },
  65          .set = sd_setbrightness,
  66          .get = sd_getbrightness,
  67          },
  68 #define SD_CONTRAST 1
  69         {
  70          {
  71           .id = V4L2_CID_CONTRAST,
  72           .type = V4L2_CTRL_TYPE_INTEGER,
  73           .name = "Contrast",
  74           .minimum = 0,
  75           .maximum = 0xffff,
  76           .step = 1,
  77           .default_value = 0x7fff,
  78           },
  79          .set = sd_setcontrast,
  80          .get = sd_getcontrast,
  81          },
  82 };
  83
  84 static struct v4l2_pix_format sif_mode[] = {
  85         {176, 144, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
  86                 .bytesperline = 176,
  87                 .sizeimage = 176 * 144,
  88                 .colorspace = V4L2_COLORSPACE_SRGB,
  89                 .priv = 1},
  90         {352, 288, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
  91                 .bytesperline = 352,
  92                 .sizeimage = 352 * 288,
  93                 .colorspace = V4L2_COLORSPACE_SRGB,
  94                 .priv = 0},
  95 };
  96
  97 /*
  98  * Initialization data: this is the first set-up data written to the
  99  * device (before the open data).
 100  */
 101 #define TESTCLK 0x10            /* reg 0x2c -> 0x12 //10 */
 102 #define TESTCOMP 0x90           /* reg 0x28 -> 0x80 */
 103 #define TESTLINE 0x81           /* reg 0x29 -> 0x81 */
 104 #define QCIFLINE 0x41           /* reg 0x29 -> 0x81 */
 105 #define TESTPTL 0x14            /* reg 0x2D -> 0x14 */
 106 #define TESTPTH 0x01            /* reg 0x2E -> 0x01 */
 107 #define TESTPTBL 0x12           /* reg 0x2F -> 0x0a */
 108 #define TESTPTBH 0x01           /* reg 0x30 -> 0x01 */
 109 #define ADWIDTHL 0xe8           /* reg 0x0c -> 0xe8 */
 110 #define ADWIDTHH 0x03           /* reg 0x0d -> 0x03 */
 111 #define ADHEIGHL 0x90           /* reg 0x0e -> 0x91 //93 */
 112 #define ADHEIGHH 0x01           /* reg 0x0f -> 0x01 */
 113 #define EXPOL 0x8f              /* reg 0x1c -> 0x8f */
 114 #define EXPOH 0x01              /* reg 0x1d -> 0x01 */
 115 #define ADCBEGINL 0x44          /* reg 0x10 -> 0x46 //47 */
 116 #define ADCBEGINH 0x00          /* reg 0x11 -> 0x00 */
 117 #define ADRBEGINL 0x0a          /* reg 0x14 -> 0x0b //0x0c */
 118 #define ADRBEGINH 0x00          /* reg 0x15 -> 0x00 */
 119 #define TV8532_CMD_UPDATE 0x84
 120
 121 #define TV8532_EEprom_Add 0x03
 122 #define TV8532_EEprom_DataL 0x04
 123 #define TV8532_EEprom_DataM 0x05
 124 #define TV8532_EEprom_DataH 0x06
 125 #define TV8532_EEprom_TableLength 0x07
 126 #define TV8532_EEprom_Write 0x08
 127 #define TV8532_PART_CTRL 0x00
 128 #define TV8532_CTRL 0x01
 129 #define TV8532_CMD_EEprom_Open 0x30
 130 #define TV8532_CMD_EEprom_Close 0x29
 131 #define TV8532_UDP_UPDATE 0x31
 132 #define TV8532_GPIO 0x39
 133 #define TV8532_GPIO_OE 0x3B
 134 #define TV8532_REQ_RegWrite 0x02
 135 #define TV8532_REQ_RegRead 0x03
 136
 137 #define TV8532_ADWIDTH_L 0x0C
 138 #define TV8532_ADWIDTH_H 0x0D
 139 #define TV8532_ADHEIGHT_L 0x0E
 140 #define TV8532_ADHEIGHT_H 0x0F
 141 #define TV8532_EXPOSURE 0x1C
 142 #define TV8532_QUANT_COMP 0x28
 143 #define TV8532_MODE_PACKET 0x29
 144 #define TV8532_SETCLK 0x2C
 145 #define TV8532_POINT_L 0x2D
 146 #define TV8532_POINT_H 0x2E
 147 #define TV8532_POINTB_L 0x2F
 148 #define TV8532_POINTB_H 0x30
 149 #define TV8532_BUDGET_L 0x2A
 150 #define TV8532_BUDGET_H 0x2B
 151 #define TV8532_VID_L 0x34
 152 #define TV8532_VID_H 0x35
 153 #define TV8532_PID_L 0x36
 154 #define TV8532_PID_H 0x37
 155 #define TV8532_DeviceID 0x83
 156 #define TV8532_AD_SLOPE 0x91
 157 #define TV8532_AD_BITCTRL 0x94
 158 #define TV8532_AD_COLBEGIN_L 0x10
 159 #define TV8532_AD_COLBEGIN_H 0x11
 160 #define TV8532_AD_ROWBEGIN_L 0x14
 161 #define TV8532_AD_ROWBEGIN_H 0x15
 162
 163 static const __u32 tv_8532_eeprom_data[] = {
 164 /*      add             dataL      dataM        dataH */
 165         0x00010001, 0x01018011, 0x02050014, 0x0305001c,
 166         0x040d001e, 0x0505001f, 0x06050519, 0x0705011b,
 167         0x0805091e, 0x090d892e, 0x0a05892f, 0x0b050dd9,
 168         0x0c0509f1, 0
 169 };
 170
 171 static int reg_r(struct gspca_dev *gspca_dev,
 172                  __u16 index)
 173 {
 174         usb_control_msg(gspca_dev->dev,
 175                         usb_rcvctrlpipe(gspca_dev->dev, 0),
 176                         TV8532_REQ_RegRead,
 177                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 178                         0,      /* value */
 179                         index, gspca_dev->usb_buf, 1,
 180                         500);
 181         return gspca_dev->usb_buf[0];
 182 }
 183
 184 /* write 1 byte */
 185 static void reg_w_1(struct gspca_dev *gspca_dev,
 186                   __u16 index, __u8 value)
 187 {
 188         gspca_dev->usb_buf[0] = value;
 189         usb_control_msg(gspca_dev->dev,
 190                         usb_sndctrlpipe(gspca_dev->dev, 0),
 191                         TV8532_REQ_RegWrite,
 192                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 193                         0,      /* value */
 194                         index, gspca_dev->usb_buf, 1, 500);
 195 }
 196
 197 /* write 2 bytes */
 198 static void reg_w_2(struct gspca_dev *gspca_dev,
 199                   __u16 index, __u8 val1, __u8 val2)
 200 {
 201         gspca_dev->usb_buf[0] = val1;
 202         gspca_dev->usb_buf[1] = val2;
 203         usb_control_msg(gspca_dev->dev,
 204                         usb_sndctrlpipe(gspca_dev->dev, 0),
 205                         TV8532_REQ_RegWrite,
 206                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 207                         0,      /* value */
 208                         index, gspca_dev->usb_buf, 2, 500);
 209 }
 210
 211 static void tv_8532WriteEEprom(struct gspca_dev *gspca_dev)
 212 {
 213         int i = 0;
 214         __u8 reg, data0, data1, data2;
 215
 216         reg_w_1(gspca_dev, TV8532_GPIO, 0xb0);
 217         reg_w_1(gspca_dev, TV8532_CTRL, TV8532_CMD_EEprom_Open);
 218 /*      msleep(1); */
 219         while (tv_8532_eeprom_data[i]) {
 220                 reg = (tv_8532_eeprom_data[i] & 0xff000000) >> 24;
 221                 reg_w_1(gspca_dev, TV8532_EEprom_Add, reg);
 222                 /* msleep(1); */
 223                 data0 = (tv_8532_eeprom_data[i] & 0x000000ff);
 224                 reg_w_1(gspca_dev, TV8532_EEprom_DataL, data0);
 225                 /* msleep(1); */
 226                 data1 = (tv_8532_eeprom_data[i] & 0x0000ff00) >> 8;
 227                 reg_w_1(gspca_dev, TV8532_EEprom_DataM, data1);
 228                 /* msleep(1); */
 229                 data2 = (tv_8532_eeprom_data[i] & 0x00ff0000) >> 16;
 230                 reg_w_1(gspca_dev, TV8532_EEprom_DataH, data2);
 231                 /* msleep(1); */
 232                 reg_w_1(gspca_dev, TV8532_EEprom_Write, 0);
 233                 /* msleep(10); */
 234                 i++;
 235         }
 236         reg_w_1(gspca_dev, TV8532_EEprom_TableLength, i);
 237 /*      msleep(1); */
 238         reg_w_1(gspca_dev, TV8532_CTRL, TV8532_CMD_EEprom_Close);
 239         msleep(10);
 240 }
 241
 242 /* this function is called at probe time */
 243 static int sd_config(struct gspca_dev *gspca_dev,
 244                      const struct usb_device_id *id)
 245 {
 246         struct sd *sd = (struct sd *) gspca_dev;
 247         struct cam *cam;
 248
 249         tv_8532WriteEEprom(gspca_dev);
 250
 251         cam = &gspca_dev->cam;
 252         cam->dev_name = (char *) id->driver_info;
 253         cam->epaddr = 1;
 254         cam->cam_mode = sif_mode;
 255         cam->nmodes = sizeof sif_mode / sizeof sif_mode[0];
 256
 257         sd->brightness = sd_ctrls[SD_BRIGHTNESS].qctrl.default_value;
 258         sd->contrast = sd_ctrls[SD_CONTRAST].qctrl.default_value;
 259         return 0;
 260 }
 261
 262 static void tv_8532ReadRegisters(struct gspca_dev *gspca_dev)
 263 {
 264         __u8 data;
 265
 266         data = reg_r(gspca_dev, 0x0001);
 267         PDEBUG(D_USBI, "register 0x01-> %x", data);
 268         data = reg_r(gspca_dev, 0x0002);
 269         PDEBUG(D_USBI, "register 0x02-> %x", data);
 270         reg_r(gspca_dev, TV8532_ADWIDTH_L);
 271         reg_r(gspca_dev, TV8532_ADWIDTH_H);
 272         reg_r(gspca_dev, TV8532_QUANT_COMP);
 273         reg_r(gspca_dev, TV8532_MODE_PACKET);
 274         reg_r(gspca_dev, TV8532_SETCLK);
 275         reg_r(gspca_dev, TV8532_POINT_L);
 276         reg_r(gspca_dev, TV8532_POINT_H);
 277         reg_r(gspca_dev, TV8532_POINTB_L);
 278         reg_r(gspca_dev, TV8532_POINTB_H);
 279         reg_r(gspca_dev, TV8532_BUDGET_L);
 280         reg_r(gspca_dev, TV8532_BUDGET_H);
 281         reg_r(gspca_dev, TV8532_VID_L);
 282         reg_r(gspca_dev, TV8532_VID_H);
 283         reg_r(gspca_dev, TV8532_PID_L);
 284         reg_r(gspca_dev, TV8532_PID_H);
 285         reg_r(gspca_dev, TV8532_DeviceID);
 286         reg_r(gspca_dev, TV8532_AD_COLBEGIN_L);
 287         reg_r(gspca_dev, TV8532_AD_COLBEGIN_H);
 288         reg_r(gspca_dev, TV8532_AD_ROWBEGIN_L);
 289         reg_r(gspca_dev, TV8532_AD_ROWBEGIN_H);
 290 }
 291
 292 static void tv_8532_setReg(struct gspca_dev *gspca_dev)
 293 {
 294         reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_L,
 295                         ADCBEGINL);                     /* 0x10 */
 296         reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_H,
 297                         ADCBEGINH);                     /* also digital gain */
 298         reg_w_1(gspca_dev, TV8532_PART_CTRL,
 299                         TV8532_CMD_UPDATE);             /* 0x00<-0x84 */
 300
 301         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0a);
 302         /******************************************************/
 303         reg_w_1(gspca_dev, TV8532_ADHEIGHT_L, ADHEIGHL); /* 0e */
 304         reg_w_1(gspca_dev, TV8532_ADHEIGHT_H, ADHEIGHH); /* 0f */
 305         reg_w_2(gspca_dev, TV8532_EXPOSURE,
 306                         EXPOL, EXPOH);                  /* 350d 0x014c; 1c */
 307         reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_L,
 308                         ADCBEGINL);                     /* 0x10 */
 309         reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_H,
 310                         ADCBEGINH);                     /* also digital gain */
 311         reg_w_1(gspca_dev, TV8532_AD_ROWBEGIN_L,
 312                         ADRBEGINL);                     /* 0x14 */
 313
 314         reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x00);      /* 0x91 */
 315         reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x02);    /* 0x94 */
 316
 317         reg_w_1(gspca_dev, TV8532_CTRL,
 318                         TV8532_CMD_EEprom_Close);       /* 0x01 */
 319
 320         reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x00);      /* 0x91 */
 321         reg_w_1(gspca_dev, TV8532_PART_CTRL,
 322                         TV8532_CMD_UPDATE);             /* 0x00<-0x84 */
 323 }
 324
 325 static void tv_8532_PollReg(struct gspca_dev *gspca_dev)
 326 {
 327         int i;
 328
 329         /* strange polling from tgc */
 330         for (i = 0; i < 10; i++) {
 331                 reg_w_1(gspca_dev, TV8532_SETCLK,
 332                         TESTCLK);               /* 0x48; //0x08; 0x2c */
 333                 reg_w_1(gspca_dev, TV8532_PART_CTRL, TV8532_CMD_UPDATE);
 334                 reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01);    /* 0x31 */
 335         }
 336 }
 337
 338 /* this function is called at open time */
 339 static int sd_open(struct gspca_dev *gspca_dev)
 340 {
 341         reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x32);
 342         reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x00);
 343         tv_8532ReadRegisters(gspca_dev);
 344         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 345         reg_w_2(gspca_dev, TV8532_ADHEIGHT_L, ADHEIGHL,
 346                                 ADHEIGHH);      /* 401d 0x0169; 0e */
 347         reg_w_2(gspca_dev, TV8532_EXPOSURE, EXPOL,
 348                                 EXPOH);         /* 350d 0x014c; 1c */
 349         reg_w_1(gspca_dev, TV8532_ADWIDTH_L, ADWIDTHL); /* 0x20; 0x0c */
 350         reg_w_1(gspca_dev, TV8532_ADWIDTH_H, ADWIDTHH); /* 0x0d */
 351
 352         /*******************************************************************/
 353         reg_w_1(gspca_dev, TV8532_QUANT_COMP,
 354                         TESTCOMP);      /* 0x72 compressed mode 0x28 */
 355         reg_w_1(gspca_dev, TV8532_MODE_PACKET,
 356                         TESTLINE);      /* 0x84; // CIF | 4 packet 0x29 */
 357
 358         /************************************************/
 359         reg_w_1(gspca_dev, TV8532_SETCLK,
 360                         TESTCLK);               /* 0x48; //0x08; 0x2c */
 361         reg_w_1(gspca_dev, TV8532_POINT_L,
 362                         TESTPTL);               /* 0x38; 0x2d */
 363         reg_w_1(gspca_dev, TV8532_POINT_H,
 364                         TESTPTH);               /* 0x04; 0x2e */
 365         reg_w_1(gspca_dev, TV8532_POINTB_L,
 366                         TESTPTBL);              /* 0x04; 0x2f */
 367         reg_w_1(gspca_dev, TV8532_POINTB_H,
 368                         TESTPTBH);              /* 0x04; 0x30 */
 369         reg_w_1(gspca_dev, TV8532_PART_CTRL,
 370                         TV8532_CMD_UPDATE);     /* 0x00<-0x84 */
 371         /*************************************************/
 372         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01);    /* 0x31 */
 373         msleep(200);
 374         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00);    /* 0x31 */
 375         /*************************************************/
 376         tv_8532_setReg(gspca_dev);
 377         /*************************************************/
 378         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 379         /*************************************************/
 380         tv_8532_setReg(gspca_dev);
 381         /*************************************************/
 382         tv_8532_PollReg(gspca_dev);
 383         return 0;
 384 }
 385
 386 static void setbrightness(struct gspca_dev *gspca_dev)
 387 {
 388         struct sd *sd = (struct sd *) gspca_dev;
 389         int brightness = sd->brightness;
 390
 391         reg_w_2(gspca_dev, TV8532_EXPOSURE,
 392                 brightness >> 8, brightness);           /* 1c */
 393         reg_w_1(gspca_dev, TV8532_PART_CTRL, TV8532_CMD_UPDATE);
 394 }
 395
 396 /* -- start the camera -- */
 397 static void sd_start(struct gspca_dev *gspca_dev)
 398 {
 399         reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x32);
 400         reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x00);
 401         tv_8532ReadRegisters(gspca_dev);
 402         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 403         reg_w_2(gspca_dev, TV8532_ADHEIGHT_L,
 404                 ADHEIGHL, ADHEIGHH);    /* 401d 0x0169; 0e */
 405 /*      reg_w_2(gspca_dev, TV8532_EXPOSURE,
 406                 EXPOL, EXPOH);           * 350d 0x014c; 1c */
 407         setbrightness(gspca_dev);
 408
 409         reg_w_1(gspca_dev, TV8532_ADWIDTH_L, ADWIDTHL); /* 0x20; 0x0c */
 410         reg_w_1(gspca_dev, TV8532_ADWIDTH_H, ADWIDTHH); /* 0x0d */
 411
 412         /************************************************/
 413         reg_w_1(gspca_dev, TV8532_QUANT_COMP,
 414                         TESTCOMP);      /* 0x72 compressed mode 0x28 */
 415         if (gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv) {
 416                 /* 176x144 */
 417                 reg_w_1(gspca_dev, TV8532_MODE_PACKET,
 418                         QCIFLINE);      /* 0x84; // CIF | 4 packet 0x29 */
 419         } else {
 420                 /* 352x288 */
 421                 reg_w_1(gspca_dev, TV8532_MODE_PACKET,
 422                         TESTLINE);      /* 0x84; // CIF | 4 packet 0x29 */
 423         }
 424         /************************************************/
 425         reg_w_1(gspca_dev, TV8532_SETCLK,
 426                         TESTCLK);               /* 0x48; //0x08; 0x2c */
 427         reg_w_1(gspca_dev, TV8532_POINT_L,
 428                         TESTPTL);               /* 0x38; 0x2d */
 429         reg_w_1(gspca_dev, TV8532_POINT_H,
 430                         TESTPTH);               /* 0x04; 0x2e */
 431         reg_w_1(gspca_dev, TV8532_POINTB_L,
 432                         TESTPTBL);              /* 0x04; 0x2f */
 433         reg_w_1(gspca_dev, TV8532_POINTB_H,
 434                         TESTPTBH);              /* 0x04; 0x30 */
 435         reg_w_1(gspca_dev, TV8532_PART_CTRL,
 436                         TV8532_CMD_UPDATE);     /* 0x00<-0x84 */
 437         /************************************************/
 438         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01);    /* 0x31 */
 439         msleep(200);
 440         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00);    /* 0x31 */
 441         /************************************************/
 442         tv_8532_setReg(gspca_dev);
 443         /************************************************/
 444         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 445         /************************************************/
 446         tv_8532_setReg(gspca_dev);
 447         /************************************************/
 448         tv_8532_PollReg(gspca_dev);
 449         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00);    /* 0x31 */
 450 }
 451
 452 static void sd_stopN(struct gspca_dev *gspca_dev)
 453 {
 454         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 455 }
 456
 457 static void sd_stop0(struct gspca_dev *gspca_dev)
 458 {
 459 }
 460
 461 static void sd_close(struct gspca_dev *gspca_dev)
 462 {
 463 }
 464
 465 static void tv8532_preprocess(struct gspca_dev *gspca_dev)
 466 {
 467         struct sd *sd = (struct sd *) gspca_dev;
 468 /* we should received a whole frame with header and EOL marker
 469  * in gspca_dev->tmpbuf and return a GBRG pattern in gspca_dev->tmpbuf2
 470  * sequence 2bytes header the Alternate pixels bayer GB 4 bytes
 471  * Alternate pixels bayer RG 4 bytes EOL */
 472         int width = gspca_dev->width;
 473         int height = gspca_dev->height;
 474         unsigned char *dst = sd->tmpbuf2;
 475         unsigned char *data = sd->tmpbuf;
 476         int i;
 477
 478         /* precompute where is the good bayer line */
 479         if (((data[3] + data[width + 7]) >> 1)
 480             + (data[4] >> 2)
 481             + (data[width + 6] >> 1) >= ((data[2] + data[width + 6]) >> 1)
 482             + (data[3] >> 2)
 483             + (data[width + 5] >> 1))
 484                 data += 3;
 485         else
 486                 data += 2;
 487         for (i = 0; i < height / 2; i++) {
 488                 memcpy(dst, data, width);
 489                 data += width + 3;
 490                 dst += width;
 491                 memcpy(dst, data, width);
 492                 data += width + 7;
 493                 dst += width;
 494         }
 495 }
 496
 497 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 498                         struct gspca_frame *frame,      /* target */
 499                         __u8 *data,                     /* isoc packet */
 500                         int len)                        /* iso packet length */
 501 {
 502         struct sd *sd = (struct sd *) gspca_dev;
 503
 504         if (data[0] != 0x80) {
 505                 sd->packet++;
 506                 if (sd->buflen + len > sizeof sd->tmpbuf) {
 507                         if (gspca_dev->last_packet_type != DISCARD_PACKET) {
 508                                 PDEBUG(D_PACK, "buffer overflow");
 509                                 gspca_dev->last_packet_type = DISCARD_PACKET;
 510                         }
 511                         return;
 512                 }
 513                 memcpy(&sd->tmpbuf[sd->buflen], data, len);
 514                 sd->buflen += len;
 515                 return;
 516         }
 517
 518         /* here we detect 0x80 */
 519         /* counter is limited so we need few header for a frame :) */
 520
 521         /* header 0x80 0x80 0x80 0x80 0x80 */
 522         /* packet  00   63  127  145  00   */
 523         /* sof     0     1   1    0    0   */
 524
 525         /* update sequence */
 526         if (sd->packet == 63 || sd->packet == 127)
 527                 sd->synchro = 1;
 528
 529         /* is there a frame start ? */
 530         if (sd->packet >= (gspca_dev->height >> 1) - 1) {
 531                 PDEBUG(D_PACK, "SOF > %d packet %d", sd->synchro,
 532                        sd->packet);
 533                 if (!sd->synchro) {     /* start of frame */
 534                         if (gspca_dev->last_packet_type == FIRST_PACKET) {
 535                                 tv8532_preprocess(gspca_dev);
 536                                 frame = gspca_frame_add(gspca_dev,
 537                                                         LAST_PACKET,
 538                                                         frame, sd->tmpbuf2,
 539                                                         gspca_dev->width *
 540                                                             gspca_dev->width);
 541                         }
 542                         gspca_frame_add(gspca_dev, FIRST_PACKET,
 543                                         frame, data, 0);
 544                         memcpy(sd->tmpbuf, data, len);
 545                         sd->buflen = len;
 546                         sd->packet = 0;
 547                         return;
 548                 }
 549                 if (gspca_dev->last_packet_type != DISCARD_PACKET) {
 550                         PDEBUG(D_PACK,
 551                                "Warning wrong TV8532 frame detection %d",
 552                                sd->packet);
 553                         gspca_dev->last_packet_type = DISCARD_PACKET;
 554                 }
 555                 return;
 556         }
 557
 558         if (!sd->synchro) {
 559                 /* Drop packet frame corrupt */
 560                 PDEBUG(D_PACK, "DROP SOF %d packet %d",
 561                        sd->synchro, sd->packet);
 562                 sd->packet = 0;
 563                 gspca_dev->last_packet_type = DISCARD_PACKET;
 564                 return;
 565         }
 566         sd->synchro = 1;
 567         sd->packet++;
 568         memcpy(&sd->tmpbuf[sd->buflen], data, len);
 569         sd->buflen += len;
 570 }
 571
 572 static void setcontrast(struct gspca_dev *gspca_dev)
 573 {
 574 }
 575
 576 static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val)
 577 {
 578         struct sd *sd = (struct sd *) gspca_dev;
 579
 580         sd->brightness = val;
 581         if (gspca_dev->streaming)
 582                 setbrightness(gspca_dev);
 583         return 0;
 584 }
 585
 586 static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val)
 587 {
 588         struct sd *sd = (struct sd *) gspca_dev;
 589
 590         *val = sd->brightness;
 591         return 0;
 592 }
 593
 594 static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val)
 595 {
 596         struct sd *sd = (struct sd *) gspca_dev;
 597
 598         sd->contrast = val;
 599         if (gspca_dev->streaming)
 600                 setcontrast(gspca_dev);
 601         return 0;
 602 }
 603
 604 static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val)
 605 {
 606         struct sd *sd = (struct sd *) gspca_dev;
 607
 608         *val = sd->contrast;
 609         return 0;
 610 }
 611
 612 /* sub-driver description */
 613 static const struct sd_desc sd_desc = {
 614         .name = MODULE_NAME,
 615         .ctrls = sd_ctrls,
 616         .nctrls = ARRAY_SIZE(sd_ctrls),
 617         .config = sd_config,
 618         .open = sd_open,
 619         .start = sd_start,
 620         .stopN = sd_stopN,
 621         .stop0 = sd_stop0,
 622         .close = sd_close,
 623         .pkt_scan = sd_pkt_scan,
 624 };
 625
 626 /* -- module initialisation -- */
 627 #define DVNM(name) .driver_info = (kernel_ulong_t) name
 628 static const __devinitdata struct usb_device_id device_table[] = {
 629         {USB_DEVICE(0x046d, 0x0920), DVNM("QC Express")},
 630         {USB_DEVICE(0x046d, 0x0921), DVNM("Labtec Webcam")},
 631         {USB_DEVICE(0x0545, 0x808b), DVNM("Veo Stingray")},
 632         {USB_DEVICE(0x0545, 0x8333), DVNM("Veo Stingray")},
 633         {USB_DEVICE(0x0923, 0x010f), DVNM("ICM532 cams")},
 634         {}
 635 };
 636
 637 MODULE_DEVICE_TABLE(usb, device_table);
 638
 639 /* -- device connect -- */
 640 static int sd_probe(struct usb_interface *intf,
 641                     const struct usb_device_id *id)
 642 {
 643         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 644                                THIS_MODULE);
 645 }
 646
 647 static struct usb_driver sd_driver = {
 648         .name = MODULE_NAME,
 649         .id_table = device_table,
 650         .probe = sd_probe,
 651         .disconnect = gspca_disconnect,
 652 };
 653
 654 /* -- module insert / remove -- */
 655 static int __init sd_mod_init(void)
 656 {
 657         if (usb_register(&sd_driver) < 0)
 658                 return -1;
 659         PDEBUG(D_PROBE, "v%s registered", version);
 660         return 0;
 661 }
 662
 663 static void __exit sd_mod_exit(void)
 664 {
 665         usb_deregister(&sd_driver);
 666         PDEBUG(D_PROBE, "deregistered");
 667 }
 668
 669 module_init(sd_mod_init);
 670 module_exit(sd_mod_exit);