git.oblomov.eu Git - linux-2.6/blob - 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 MODULE_AUTHOR("Michel Xhaard <mxhaard@users.sourceforge.net>");
  26 MODULE_DESCRIPTION("TV8532 USB Camera Driver");
  27 MODULE_LICENSE("GPL");
  28
  29 /* specific webcam descriptor */
  30 struct sd {
  31         struct gspca_dev gspca_dev;     /* !! must be the first item */
  32
  33         int buflen;                     /* current length of tmpbuf */
  34         __u8 tmpbuf[352 * 288 + 10 * 288];      /* no protection... */
  35         __u8 tmpbuf2[352 * 288];                /* no protection... */
  36
  37         unsigned short brightness;
  38         unsigned short contrast;
  39
  40         char packet;
  41         char synchro;
  42 };
  43
  44 /* V4L2 controls supported by the driver */
  45 static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val);
  46 static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val);
  47 static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val);
  48 static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val);
  49
  50 static struct ctrl sd_ctrls[] = {
  51 #define SD_BRIGHTNESS 0
  52         {
  53          {
  54           .id = V4L2_CID_BRIGHTNESS,
  55           .type = V4L2_CTRL_TYPE_INTEGER,
  56           .name = "Brightness",
  57           .minimum = 1,
  58           .maximum = 0x2ff,
  59           .step = 1,
  60           .default_value = 0x18f,
  61           },
  62          .set = sd_setbrightness,
  63          .get = sd_getbrightness,
  64          },
  65 #define SD_CONTRAST 1
  66         {
  67          {
  68           .id = V4L2_CID_CONTRAST,
  69           .type = V4L2_CTRL_TYPE_INTEGER,
  70           .name = "Contrast",
  71           .minimum = 0,
  72           .maximum = 0xffff,
  73           .step = 1,
  74           .default_value = 0x7fff,
  75           },
  76          .set = sd_setcontrast,
  77          .get = sd_getcontrast,
  78          },
  79 };
  80
  81 static struct v4l2_pix_format sif_mode[] = {
  82         {176, 144, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
  83                 .bytesperline = 176,
  84                 .sizeimage = 176 * 144,
  85                 .colorspace = V4L2_COLORSPACE_SRGB,
  86                 .priv = 1},
  87         {352, 288, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
  88                 .bytesperline = 352,
  89                 .sizeimage = 352 * 288,
  90                 .colorspace = V4L2_COLORSPACE_SRGB,
  91                 .priv = 0},
  92 };
  93
  94 /*
  95  * Initialization data: this is the first set-up data written to the
  96  * device (before the open data).
  97  */
  98 #define TESTCLK 0x10            /* reg 0x2c -> 0x12 //10 */
  99 #define TESTCOMP 0x90           /* reg 0x28 -> 0x80 */
 100 #define TESTLINE 0x81           /* reg 0x29 -> 0x81 */
 101 #define QCIFLINE 0x41           /* reg 0x29 -> 0x81 */
 102 #define TESTPTL 0x14            /* reg 0x2D -> 0x14 */
 103 #define TESTPTH 0x01            /* reg 0x2E -> 0x01 */
 104 #define TESTPTBL 0x12           /* reg 0x2F -> 0x0a */
 105 #define TESTPTBH 0x01           /* reg 0x30 -> 0x01 */
 106 #define ADWIDTHL 0xe8           /* reg 0x0c -> 0xe8 */
 107 #define ADWIDTHH 0x03           /* reg 0x0d -> 0x03 */
 108 #define ADHEIGHL 0x90           /* reg 0x0e -> 0x91 //93 */
 109 #define ADHEIGHH 0x01           /* reg 0x0f -> 0x01 */
 110 #define EXPOL 0x8f              /* reg 0x1c -> 0x8f */
 111 #define EXPOH 0x01              /* reg 0x1d -> 0x01 */
 112 #define ADCBEGINL 0x44          /* reg 0x10 -> 0x46 //47 */
 113 #define ADCBEGINH 0x00          /* reg 0x11 -> 0x00 */
 114 #define ADRBEGINL 0x0a          /* reg 0x14 -> 0x0b //0x0c */
 115 #define ADRBEGINH 0x00          /* reg 0x15 -> 0x00 */
 116 #define TV8532_CMD_UPDATE 0x84
 117
 118 #define TV8532_EEprom_Add 0x03
 119 #define TV8532_EEprom_DataL 0x04
 120 #define TV8532_EEprom_DataM 0x05
 121 #define TV8532_EEprom_DataH 0x06
 122 #define TV8532_EEprom_TableLength 0x07
 123 #define TV8532_EEprom_Write 0x08
 124 #define TV8532_PART_CTRL 0x00
 125 #define TV8532_CTRL 0x01
 126 #define TV8532_CMD_EEprom_Open 0x30
 127 #define TV8532_CMD_EEprom_Close 0x29
 128 #define TV8532_UDP_UPDATE 0x31
 129 #define TV8532_GPIO 0x39
 130 #define TV8532_GPIO_OE 0x3B
 131 #define TV8532_REQ_RegWrite 0x02
 132 #define TV8532_REQ_RegRead 0x03
 133
 134 #define TV8532_ADWIDTH_L 0x0C
 135 #define TV8532_ADWIDTH_H 0x0D
 136 #define TV8532_ADHEIGHT_L 0x0E
 137 #define TV8532_ADHEIGHT_H 0x0F
 138 #define TV8532_EXPOSURE 0x1C
 139 #define TV8532_QUANT_COMP 0x28
 140 #define TV8532_MODE_PACKET 0x29
 141 #define TV8532_SETCLK 0x2C
 142 #define TV8532_POINT_L 0x2D
 143 #define TV8532_POINT_H 0x2E
 144 #define TV8532_POINTB_L 0x2F
 145 #define TV8532_POINTB_H 0x30
 146 #define TV8532_BUDGET_L 0x2A
 147 #define TV8532_BUDGET_H 0x2B
 148 #define TV8532_VID_L 0x34
 149 #define TV8532_VID_H 0x35
 150 #define TV8532_PID_L 0x36
 151 #define TV8532_PID_H 0x37
 152 #define TV8532_DeviceID 0x83
 153 #define TV8532_AD_SLOPE 0x91
 154 #define TV8532_AD_BITCTRL 0x94
 155 #define TV8532_AD_COLBEGIN_L 0x10
 156 #define TV8532_AD_COLBEGIN_H 0x11
 157 #define TV8532_AD_ROWBEGIN_L 0x14
 158 #define TV8532_AD_ROWBEGIN_H 0x15
 159
 160 static const __u32 tv_8532_eeprom_data[] = {
 161 /*      add             dataL      dataM        dataH */
 162         0x00010001, 0x01018011, 0x02050014, 0x0305001c,
 163         0x040d001e, 0x0505001f, 0x06050519, 0x0705011b,
 164         0x0805091e, 0x090d892e, 0x0a05892f, 0x0b050dd9,
 165         0x0c0509f1, 0
 166 };
 167
 168 static int reg_r(struct gspca_dev *gspca_dev,
 169                  __u16 index)
 170 {
 171         usb_control_msg(gspca_dev->dev,
 172                         usb_rcvctrlpipe(gspca_dev->dev, 0),
 173                         TV8532_REQ_RegRead,
 174                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 175                         0,      /* value */
 176                         index, gspca_dev->usb_buf, 1,
 177                         500);
 178         return gspca_dev->usb_buf[0];
 179 }
 180
 181 /* write 1 byte */
 182 static void reg_w_1(struct gspca_dev *gspca_dev,
 183                   __u16 index, __u8 value)
 184 {
 185         gspca_dev->usb_buf[0] = value;
 186         usb_control_msg(gspca_dev->dev,
 187                         usb_sndctrlpipe(gspca_dev->dev, 0),
 188                         TV8532_REQ_RegWrite,
 189                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 190                         0,      /* value */
 191                         index, gspca_dev->usb_buf, 1, 500);
 192 }
 193
 194 /* write 2 bytes */
 195 static void reg_w_2(struct gspca_dev *gspca_dev,
 196                   __u16 index, __u8 val1, __u8 val2)
 197 {
 198         gspca_dev->usb_buf[0] = val1;
 199         gspca_dev->usb_buf[1] = val2;
 200         usb_control_msg(gspca_dev->dev,
 201                         usb_sndctrlpipe(gspca_dev->dev, 0),
 202                         TV8532_REQ_RegWrite,
 203                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 204                         0,      /* value */
 205                         index, gspca_dev->usb_buf, 2, 500);
 206 }
 207
 208 static void tv_8532WriteEEprom(struct gspca_dev *gspca_dev)
 209 {
 210         int i = 0;
 211         __u8 reg, data0, data1, data2;
 212
 213         reg_w_1(gspca_dev, TV8532_GPIO, 0xb0);
 214         reg_w_1(gspca_dev, TV8532_CTRL, TV8532_CMD_EEprom_Open);
 215 /*      msleep(1); */
 216         while (tv_8532_eeprom_data[i]) {
 217                 reg = (tv_8532_eeprom_data[i] & 0xff000000) >> 24;
 218                 reg_w_1(gspca_dev, TV8532_EEprom_Add, reg);
 219                 /* msleep(1); */
 220                 data0 = (tv_8532_eeprom_data[i] & 0x000000ff);
 221                 reg_w_1(gspca_dev, TV8532_EEprom_DataL, data0);
 222                 /* msleep(1); */
 223                 data1 = (tv_8532_eeprom_data[i] & 0x0000ff00) >> 8;
 224                 reg_w_1(gspca_dev, TV8532_EEprom_DataM, data1);
 225                 /* msleep(1); */
 226                 data2 = (tv_8532_eeprom_data[i] & 0x00ff0000) >> 16;
 227                 reg_w_1(gspca_dev, TV8532_EEprom_DataH, data2);
 228                 /* msleep(1); */
 229                 reg_w_1(gspca_dev, TV8532_EEprom_Write, 0);
 230                 /* msleep(10); */
 231                 i++;
 232         }
 233         reg_w_1(gspca_dev, TV8532_EEprom_TableLength, i);
 234 /*      msleep(1); */
 235         reg_w_1(gspca_dev, TV8532_CTRL, TV8532_CMD_EEprom_Close);
 236         msleep(10);
 237 }
 238
 239 /* this function is called at probe time */
 240 static int sd_config(struct gspca_dev *gspca_dev,
 241                      const struct usb_device_id *id)
 242 {
 243         struct sd *sd = (struct sd *) gspca_dev;
 244         struct cam *cam;
 245
 246         tv_8532WriteEEprom(gspca_dev);
 247
 248         cam = &gspca_dev->cam;
 249         cam->dev_name = (char *) id->driver_info;
 250         cam->epaddr = 1;
 251         cam->cam_mode = sif_mode;
 252         cam->nmodes = sizeof sif_mode / sizeof sif_mode[0];
 253
 254         sd->brightness = sd_ctrls[SD_BRIGHTNESS].qctrl.default_value;
 255         sd->contrast = sd_ctrls[SD_CONTRAST].qctrl.default_value;
 256         return 0;
 257 }
 258
 259 static void tv_8532ReadRegisters(struct gspca_dev *gspca_dev)
 260 {
 261         __u8 data;
 262
 263         data = reg_r(gspca_dev, 0x0001);
 264         PDEBUG(D_USBI, "register 0x01-> %x", data);
 265         data = reg_r(gspca_dev, 0x0002);
 266         PDEBUG(D_USBI, "register 0x02-> %x", data);
 267         reg_r(gspca_dev, TV8532_ADWIDTH_L);
 268         reg_r(gspca_dev, TV8532_ADWIDTH_H);
 269         reg_r(gspca_dev, TV8532_QUANT_COMP);
 270         reg_r(gspca_dev, TV8532_MODE_PACKET);
 271         reg_r(gspca_dev, TV8532_SETCLK);
 272         reg_r(gspca_dev, TV8532_POINT_L);
 273         reg_r(gspca_dev, TV8532_POINT_H);
 274         reg_r(gspca_dev, TV8532_POINTB_L);
 275         reg_r(gspca_dev, TV8532_POINTB_H);
 276         reg_r(gspca_dev, TV8532_BUDGET_L);
 277         reg_r(gspca_dev, TV8532_BUDGET_H);
 278         reg_r(gspca_dev, TV8532_VID_L);
 279         reg_r(gspca_dev, TV8532_VID_H);
 280         reg_r(gspca_dev, TV8532_PID_L);
 281         reg_r(gspca_dev, TV8532_PID_H);
 282         reg_r(gspca_dev, TV8532_DeviceID);
 283         reg_r(gspca_dev, TV8532_AD_COLBEGIN_L);
 284         reg_r(gspca_dev, TV8532_AD_COLBEGIN_H);
 285         reg_r(gspca_dev, TV8532_AD_ROWBEGIN_L);
 286         reg_r(gspca_dev, TV8532_AD_ROWBEGIN_H);
 287 }
 288
 289 static void tv_8532_setReg(struct gspca_dev *gspca_dev)
 290 {
 291         reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_L,
 292                         ADCBEGINL);                     /* 0x10 */
 293         reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_H,
 294                         ADCBEGINH);                     /* also digital gain */
 295         reg_w_1(gspca_dev, TV8532_PART_CTRL,
 296                         TV8532_CMD_UPDATE);             /* 0x00<-0x84 */
 297
 298         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0a);
 299         /******************************************************/
 300         reg_w_1(gspca_dev, TV8532_ADHEIGHT_L, ADHEIGHL); /* 0e */
 301         reg_w_1(gspca_dev, TV8532_ADHEIGHT_H, ADHEIGHH); /* 0f */
 302         reg_w_2(gspca_dev, TV8532_EXPOSURE,
 303                         EXPOL, EXPOH);                  /* 350d 0x014c; 1c */
 304         reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_L,
 305                         ADCBEGINL);                     /* 0x10 */
 306         reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_H,
 307                         ADCBEGINH);                     /* also digital gain */
 308         reg_w_1(gspca_dev, TV8532_AD_ROWBEGIN_L,
 309                         ADRBEGINL);                     /* 0x14 */
 310
 311         reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x00);      /* 0x91 */
 312         reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x02);    /* 0x94 */
 313
 314         reg_w_1(gspca_dev, TV8532_CTRL,
 315                         TV8532_CMD_EEprom_Close);       /* 0x01 */
 316
 317         reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x00);      /* 0x91 */
 318         reg_w_1(gspca_dev, TV8532_PART_CTRL,
 319                         TV8532_CMD_UPDATE);             /* 0x00<-0x84 */
 320 }
 321
 322 static void tv_8532_PollReg(struct gspca_dev *gspca_dev)
 323 {
 324         int i;
 325
 326         /* strange polling from tgc */
 327         for (i = 0; i < 10; i++) {
 328                 reg_w_1(gspca_dev, TV8532_SETCLK,
 329                         TESTCLK);               /* 0x48; //0x08; 0x2c */
 330                 reg_w_1(gspca_dev, TV8532_PART_CTRL, TV8532_CMD_UPDATE);
 331                 reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01);    /* 0x31 */
 332         }
 333 }
 334
 335 /* this function is called at open time */
 336 static int sd_open(struct gspca_dev *gspca_dev)
 337 {
 338         reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x32);
 339         reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x00);
 340         tv_8532ReadRegisters(gspca_dev);
 341         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 342         reg_w_2(gspca_dev, TV8532_ADHEIGHT_L, ADHEIGHL,
 343                                 ADHEIGHH);      /* 401d 0x0169; 0e */
 344         reg_w_2(gspca_dev, TV8532_EXPOSURE, EXPOL,
 345                                 EXPOH);         /* 350d 0x014c; 1c */
 346         reg_w_1(gspca_dev, TV8532_ADWIDTH_L, ADWIDTHL); /* 0x20; 0x0c */
 347         reg_w_1(gspca_dev, TV8532_ADWIDTH_H, ADWIDTHH); /* 0x0d */
 348
 349         /*******************************************************************/
 350         reg_w_1(gspca_dev, TV8532_QUANT_COMP,
 351                         TESTCOMP);      /* 0x72 compressed mode 0x28 */
 352         reg_w_1(gspca_dev, TV8532_MODE_PACKET,
 353                         TESTLINE);      /* 0x84; // CIF | 4 packet 0x29 */
 354
 355         /************************************************/
 356         reg_w_1(gspca_dev, TV8532_SETCLK,
 357                         TESTCLK);               /* 0x48; //0x08; 0x2c */
 358         reg_w_1(gspca_dev, TV8532_POINT_L,
 359                         TESTPTL);               /* 0x38; 0x2d */
 360         reg_w_1(gspca_dev, TV8532_POINT_H,
 361                         TESTPTH);               /* 0x04; 0x2e */
 362         reg_w_1(gspca_dev, TV8532_POINTB_L,
 363                         TESTPTBL);              /* 0x04; 0x2f */
 364         reg_w_1(gspca_dev, TV8532_POINTB_H,
 365                         TESTPTBH);              /* 0x04; 0x30 */
 366         reg_w_1(gspca_dev, TV8532_PART_CTRL,
 367                         TV8532_CMD_UPDATE);     /* 0x00<-0x84 */
 368         /*************************************************/
 369         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01);    /* 0x31 */
 370         msleep(200);
 371         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00);    /* 0x31 */
 372         /*************************************************/
 373         tv_8532_setReg(gspca_dev);
 374         /*************************************************/
 375         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 376         /*************************************************/
 377         tv_8532_setReg(gspca_dev);
 378         /*************************************************/
 379         tv_8532_PollReg(gspca_dev);
 380         return 0;
 381 }
 382
 383 static void setbrightness(struct gspca_dev *gspca_dev)
 384 {
 385         struct sd *sd = (struct sd *) gspca_dev;
 386         int brightness = sd->brightness;
 387
 388         reg_w_2(gspca_dev, TV8532_EXPOSURE,
 389                 brightness >> 8, brightness);           /* 1c */
 390         reg_w_1(gspca_dev, TV8532_PART_CTRL, TV8532_CMD_UPDATE);
 391 }
 392
 393 /* -- start the camera -- */
 394 static void sd_start(struct gspca_dev *gspca_dev)
 395 {
 396         reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x32);
 397         reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x00);
 398         tv_8532ReadRegisters(gspca_dev);
 399         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 400         reg_w_2(gspca_dev, TV8532_ADHEIGHT_L,
 401                 ADHEIGHL, ADHEIGHH);    /* 401d 0x0169; 0e */
 402 /*      reg_w_2(gspca_dev, TV8532_EXPOSURE,
 403                 EXPOL, EXPOH);           * 350d 0x014c; 1c */
 404         setbrightness(gspca_dev);
 405
 406         reg_w_1(gspca_dev, TV8532_ADWIDTH_L, ADWIDTHL); /* 0x20; 0x0c */
 407         reg_w_1(gspca_dev, TV8532_ADWIDTH_H, ADWIDTHH); /* 0x0d */
 408
 409         /************************************************/
 410         reg_w_1(gspca_dev, TV8532_QUANT_COMP,
 411                         TESTCOMP);      /* 0x72 compressed mode 0x28 */
 412         if (gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv) {
 413                 /* 176x144 */
 414                 reg_w_1(gspca_dev, TV8532_MODE_PACKET,
 415                         QCIFLINE);      /* 0x84; // CIF | 4 packet 0x29 */
 416         } else {
 417                 /* 352x288 */
 418                 reg_w_1(gspca_dev, TV8532_MODE_PACKET,
 419                         TESTLINE);      /* 0x84; // CIF | 4 packet 0x29 */
 420         }
 421         /************************************************/
 422         reg_w_1(gspca_dev, TV8532_SETCLK,
 423                         TESTCLK);               /* 0x48; //0x08; 0x2c */
 424         reg_w_1(gspca_dev, TV8532_POINT_L,
 425                         TESTPTL);               /* 0x38; 0x2d */
 426         reg_w_1(gspca_dev, TV8532_POINT_H,
 427                         TESTPTH);               /* 0x04; 0x2e */
 428         reg_w_1(gspca_dev, TV8532_POINTB_L,
 429                         TESTPTBL);              /* 0x04; 0x2f */
 430         reg_w_1(gspca_dev, TV8532_POINTB_H,
 431                         TESTPTBH);              /* 0x04; 0x30 */
 432         reg_w_1(gspca_dev, TV8532_PART_CTRL,
 433                         TV8532_CMD_UPDATE);     /* 0x00<-0x84 */
 434         /************************************************/
 435         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01);    /* 0x31 */
 436         msleep(200);
 437         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00);    /* 0x31 */
 438         /************************************************/
 439         tv_8532_setReg(gspca_dev);
 440         /************************************************/
 441         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 442         /************************************************/
 443         tv_8532_setReg(gspca_dev);
 444         /************************************************/
 445         tv_8532_PollReg(gspca_dev);
 446         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00);    /* 0x31 */
 447 }
 448
 449 static void sd_stopN(struct gspca_dev *gspca_dev)
 450 {
 451         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 452 }
 453
 454 static void sd_stop0(struct gspca_dev *gspca_dev)
 455 {
 456 }
 457
 458 static void sd_close(struct gspca_dev *gspca_dev)
 459 {
 460 }
 461
 462 static void tv8532_preprocess(struct gspca_dev *gspca_dev)
 463 {
 464         struct sd *sd = (struct sd *) gspca_dev;
 465 /* we should received a whole frame with header and EOL marker
 466  * in gspca_dev->tmpbuf and return a GBRG pattern in gspca_dev->tmpbuf2
 467  * sequence 2bytes header the Alternate pixels bayer GB 4 bytes
 468  * Alternate pixels bayer RG 4 bytes EOL */
 469         int width = gspca_dev->width;
 470         int height = gspca_dev->height;
 471         unsigned char *dst = sd->tmpbuf2;
 472         unsigned char *data = sd->tmpbuf;
 473         int i;
 474
 475         /* precompute where is the good bayer line */
 476         if (((data[3] + data[width + 7]) >> 1)
 477             + (data[4] >> 2)
 478             + (data[width + 6] >> 1) >= ((data[2] + data[width + 6]) >> 1)
 479             + (data[3] >> 2)
 480             + (data[width + 5] >> 1))
 481                 data += 3;
 482         else
 483                 data += 2;
 484         for (i = 0; i < height / 2; i++) {
 485                 memcpy(dst, data, width);
 486                 data += width + 3;
 487                 dst += width;
 488                 memcpy(dst, data, width);
 489                 data += width + 7;
 490                 dst += width;
 491         }
 492 }
 493
 494 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 495                         struct gspca_frame *frame,      /* target */
 496                         __u8 *data,                     /* isoc packet */
 497                         int len)                        /* iso packet length */
 498 {
 499         struct sd *sd = (struct sd *) gspca_dev;
 500
 501         if (data[0] != 0x80) {
 502                 sd->packet++;
 503                 if (sd->buflen + len > sizeof sd->tmpbuf) {
 504                         if (gspca_dev->last_packet_type != DISCARD_PACKET) {
 505                                 PDEBUG(D_PACK, "buffer overflow");
 506                                 gspca_dev->last_packet_type = DISCARD_PACKET;
 507                         }
 508                         return;
 509                 }
 510                 memcpy(&sd->tmpbuf[sd->buflen], data, len);
 511                 sd->buflen += len;
 512                 return;
 513         }
 514
 515         /* here we detect 0x80 */
 516         /* counter is limited so we need few header for a frame :) */
 517
 518         /* header 0x80 0x80 0x80 0x80 0x80 */
 519         /* packet  00   63  127  145  00   */
 520         /* sof     0     1   1    0    0   */
 521
 522         /* update sequence */
 523         if (sd->packet == 63 || sd->packet == 127)
 524                 sd->synchro = 1;
 525
 526         /* is there a frame start ? */
 527         if (sd->packet >= (gspca_dev->height >> 1) - 1) {
 528                 PDEBUG(D_PACK, "SOF > %d packet %d", sd->synchro,
 529                        sd->packet);
 530                 if (!sd->synchro) {     /* start of frame */
 531                         if (gspca_dev->last_packet_type == FIRST_PACKET) {
 532                                 tv8532_preprocess(gspca_dev);
 533                                 frame = gspca_frame_add(gspca_dev,
 534                                                         LAST_PACKET,
 535                                                         frame, sd->tmpbuf2,
 536                                                         gspca_dev->width *
 537                                                             gspca_dev->width);
 538                         }
 539                         gspca_frame_add(gspca_dev, FIRST_PACKET,
 540                                         frame, data, 0);
 541                         memcpy(sd->tmpbuf, data, len);
 542                         sd->buflen = len;
 543                         sd->packet = 0;
 544                         return;
 545                 }
 546                 if (gspca_dev->last_packet_type != DISCARD_PACKET) {
 547                         PDEBUG(D_PACK,
 548                                "Warning wrong TV8532 frame detection %d",
 549                                sd->packet);
 550                         gspca_dev->last_packet_type = DISCARD_PACKET;
 551                 }
 552                 return;
 553         }
 554
 555         if (!sd->synchro) {
 556                 /* Drop packet frame corrupt */
 557                 PDEBUG(D_PACK, "DROP SOF %d packet %d",
 558                        sd->synchro, sd->packet);
 559                 sd->packet = 0;
 560                 gspca_dev->last_packet_type = DISCARD_PACKET;
 561                 return;
 562         }
 563         sd->synchro = 1;
 564         sd->packet++;
 565         memcpy(&sd->tmpbuf[sd->buflen], data, len);
 566         sd->buflen += len;
 567 }
 568
 569 static void setcontrast(struct gspca_dev *gspca_dev)
 570 {
 571 }
 572
 573 static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val)
 574 {
 575         struct sd *sd = (struct sd *) gspca_dev;
 576
 577         sd->brightness = val;
 578         if (gspca_dev->streaming)
 579                 setbrightness(gspca_dev);
 580         return 0;
 581 }
 582
 583 static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val)
 584 {
 585         struct sd *sd = (struct sd *) gspca_dev;
 586
 587         *val = sd->brightness;
 588         return 0;
 589 }
 590
 591 static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val)
 592 {
 593         struct sd *sd = (struct sd *) gspca_dev;
 594
 595         sd->contrast = val;
 596         if (gspca_dev->streaming)
 597                 setcontrast(gspca_dev);
 598         return 0;
 599 }
 600
 601 static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val)
 602 {
 603         struct sd *sd = (struct sd *) gspca_dev;
 604
 605         *val = sd->contrast;
 606         return 0;
 607 }
 608
 609 /* sub-driver description */
 610 static const struct sd_desc sd_desc = {
 611         .name = MODULE_NAME,
 612         .ctrls = sd_ctrls,
 613         .nctrls = ARRAY_SIZE(sd_ctrls),
 614         .config = sd_config,
 615         .open = sd_open,
 616         .start = sd_start,
 617         .stopN = sd_stopN,
 618         .stop0 = sd_stop0,
 619         .close = sd_close,
 620         .pkt_scan = sd_pkt_scan,
 621 };
 622
 623 /* -- module initialisation -- */
 624 #define DVNM(name) .driver_info = (kernel_ulong_t) name
 625 static const __devinitdata struct usb_device_id device_table[] = {
 626         {USB_DEVICE(0x046d, 0x0920), DVNM("QC Express")},
 627         {USB_DEVICE(0x046d, 0x0921), DVNM("Labtec Webcam")},
 628         {USB_DEVICE(0x0545, 0x808b), DVNM("Veo Stingray")},
 629         {USB_DEVICE(0x0545, 0x8333), DVNM("Veo Stingray")},
 630         {USB_DEVICE(0x0923, 0x010f), DVNM("ICM532 cams")},
 631         {}
 632 };
 633
 634 MODULE_DEVICE_TABLE(usb, device_table);
 635
 636 /* -- device connect -- */
 637 static int sd_probe(struct usb_interface *intf,
 638                     const struct usb_device_id *id)
 639 {
 640         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 641                                THIS_MODULE);
 642 }
 643
 644 static struct usb_driver sd_driver = {
 645         .name = MODULE_NAME,
 646         .id_table = device_table,
 647         .probe = sd_probe,
 648         .disconnect = gspca_disconnect,
 649 };
 650
 651 /* -- module insert / remove -- */
 652 static int __init sd_mod_init(void)
 653 {
 654         if (usb_register(&sd_driver) < 0)
 655                 return -1;
 656         PDEBUG(D_PROBE, "registered");
 657         return 0;
 658 }
 659
 660 static void __exit sd_mod_exit(void)
 661 {
 662         usb_deregister(&sd_driver);
 663         PDEBUG(D_PROBE, "deregistered");
 664 }
 665
 666 module_init(sd_mod_init);
 667 module_exit(sd_mod_exit);