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->epaddr = 1;
 250         cam->cam_mode = sif_mode;
 251         cam->nmodes = sizeof sif_mode / sizeof sif_mode[0];
 252
 253         sd->brightness = sd_ctrls[SD_BRIGHTNESS].qctrl.default_value;
 254         sd->contrast = sd_ctrls[SD_CONTRAST].qctrl.default_value;
 255         return 0;
 256 }
 257
 258 static void tv_8532ReadRegisters(struct gspca_dev *gspca_dev)
 259 {
 260         __u8 data;
 261
 262         data = reg_r(gspca_dev, 0x0001);
 263         PDEBUG(D_USBI, "register 0x01-> %x", data);
 264         data = reg_r(gspca_dev, 0x0002);
 265         PDEBUG(D_USBI, "register 0x02-> %x", data);
 266         reg_r(gspca_dev, TV8532_ADWIDTH_L);
 267         reg_r(gspca_dev, TV8532_ADWIDTH_H);
 268         reg_r(gspca_dev, TV8532_QUANT_COMP);
 269         reg_r(gspca_dev, TV8532_MODE_PACKET);
 270         reg_r(gspca_dev, TV8532_SETCLK);
 271         reg_r(gspca_dev, TV8532_POINT_L);
 272         reg_r(gspca_dev, TV8532_POINT_H);
 273         reg_r(gspca_dev, TV8532_POINTB_L);
 274         reg_r(gspca_dev, TV8532_POINTB_H);
 275         reg_r(gspca_dev, TV8532_BUDGET_L);
 276         reg_r(gspca_dev, TV8532_BUDGET_H);
 277         reg_r(gspca_dev, TV8532_VID_L);
 278         reg_r(gspca_dev, TV8532_VID_H);
 279         reg_r(gspca_dev, TV8532_PID_L);
 280         reg_r(gspca_dev, TV8532_PID_H);
 281         reg_r(gspca_dev, TV8532_DeviceID);
 282         reg_r(gspca_dev, TV8532_AD_COLBEGIN_L);
 283         reg_r(gspca_dev, TV8532_AD_COLBEGIN_H);
 284         reg_r(gspca_dev, TV8532_AD_ROWBEGIN_L);
 285         reg_r(gspca_dev, TV8532_AD_ROWBEGIN_H);
 286 }
 287
 288 static void tv_8532_setReg(struct gspca_dev *gspca_dev)
 289 {
 290         reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_L,
 291                         ADCBEGINL);                     /* 0x10 */
 292         reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_H,
 293                         ADCBEGINH);                     /* also digital gain */
 294         reg_w_1(gspca_dev, TV8532_PART_CTRL,
 295                         TV8532_CMD_UPDATE);             /* 0x00<-0x84 */
 296
 297         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0a);
 298         /******************************************************/
 299         reg_w_1(gspca_dev, TV8532_ADHEIGHT_L, ADHEIGHL); /* 0e */
 300         reg_w_1(gspca_dev, TV8532_ADHEIGHT_H, ADHEIGHH); /* 0f */
 301         reg_w_2(gspca_dev, TV8532_EXPOSURE,
 302                         EXPOL, EXPOH);                  /* 350d 0x014c; 1c */
 303         reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_L,
 304                         ADCBEGINL);                     /* 0x10 */
 305         reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_H,
 306                         ADCBEGINH);                     /* also digital gain */
 307         reg_w_1(gspca_dev, TV8532_AD_ROWBEGIN_L,
 308                         ADRBEGINL);                     /* 0x14 */
 309
 310         reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x00);      /* 0x91 */
 311         reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x02);    /* 0x94 */
 312
 313         reg_w_1(gspca_dev, TV8532_CTRL,
 314                         TV8532_CMD_EEprom_Close);       /* 0x01 */
 315
 316         reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x00);      /* 0x91 */
 317         reg_w_1(gspca_dev, TV8532_PART_CTRL,
 318                         TV8532_CMD_UPDATE);             /* 0x00<-0x84 */
 319 }
 320
 321 static void tv_8532_PollReg(struct gspca_dev *gspca_dev)
 322 {
 323         int i;
 324
 325         /* strange polling from tgc */
 326         for (i = 0; i < 10; i++) {
 327                 reg_w_1(gspca_dev, TV8532_SETCLK,
 328                         TESTCLK);               /* 0x48; //0x08; 0x2c */
 329                 reg_w_1(gspca_dev, TV8532_PART_CTRL, TV8532_CMD_UPDATE);
 330                 reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01);    /* 0x31 */
 331         }
 332 }
 333
 334 /* this function is called at open time */
 335 static int sd_open(struct gspca_dev *gspca_dev)
 336 {
 337         reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x32);
 338         reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x00);
 339         tv_8532ReadRegisters(gspca_dev);
 340         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 341         reg_w_2(gspca_dev, TV8532_ADHEIGHT_L, ADHEIGHL,
 342                                 ADHEIGHH);      /* 401d 0x0169; 0e */
 343         reg_w_2(gspca_dev, TV8532_EXPOSURE, EXPOL,
 344                                 EXPOH);         /* 350d 0x014c; 1c */
 345         reg_w_1(gspca_dev, TV8532_ADWIDTH_L, ADWIDTHL); /* 0x20; 0x0c */
 346         reg_w_1(gspca_dev, TV8532_ADWIDTH_H, ADWIDTHH); /* 0x0d */
 347
 348         /*******************************************************************/
 349         reg_w_1(gspca_dev, TV8532_QUANT_COMP,
 350                         TESTCOMP);      /* 0x72 compressed mode 0x28 */
 351         reg_w_1(gspca_dev, TV8532_MODE_PACKET,
 352                         TESTLINE);      /* 0x84; // CIF | 4 packet 0x29 */
 353
 354         /************************************************/
 355         reg_w_1(gspca_dev, TV8532_SETCLK,
 356                         TESTCLK);               /* 0x48; //0x08; 0x2c */
 357         reg_w_1(gspca_dev, TV8532_POINT_L,
 358                         TESTPTL);               /* 0x38; 0x2d */
 359         reg_w_1(gspca_dev, TV8532_POINT_H,
 360                         TESTPTH);               /* 0x04; 0x2e */
 361         reg_w_1(gspca_dev, TV8532_POINTB_L,
 362                         TESTPTBL);              /* 0x04; 0x2f */
 363         reg_w_1(gspca_dev, TV8532_POINTB_H,
 364                         TESTPTBH);              /* 0x04; 0x30 */
 365         reg_w_1(gspca_dev, TV8532_PART_CTRL,
 366                         TV8532_CMD_UPDATE);     /* 0x00<-0x84 */
 367         /*************************************************/
 368         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01);    /* 0x31 */
 369         msleep(200);
 370         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00);    /* 0x31 */
 371         /*************************************************/
 372         tv_8532_setReg(gspca_dev);
 373         /*************************************************/
 374         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 375         /*************************************************/
 376         tv_8532_setReg(gspca_dev);
 377         /*************************************************/
 378         tv_8532_PollReg(gspca_dev);
 379         return 0;
 380 }
 381
 382 static void setbrightness(struct gspca_dev *gspca_dev)
 383 {
 384         struct sd *sd = (struct sd *) gspca_dev;
 385         int brightness = sd->brightness;
 386
 387         reg_w_2(gspca_dev, TV8532_EXPOSURE,
 388                 brightness >> 8, brightness);           /* 1c */
 389         reg_w_1(gspca_dev, TV8532_PART_CTRL, TV8532_CMD_UPDATE);
 390 }
 391
 392 /* -- start the camera -- */
 393 static void sd_start(struct gspca_dev *gspca_dev)
 394 {
 395         reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x32);
 396         reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x00);
 397         tv_8532ReadRegisters(gspca_dev);
 398         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 399         reg_w_2(gspca_dev, TV8532_ADHEIGHT_L,
 400                 ADHEIGHL, ADHEIGHH);    /* 401d 0x0169; 0e */
 401 /*      reg_w_2(gspca_dev, TV8532_EXPOSURE,
 402                 EXPOL, EXPOH);           * 350d 0x014c; 1c */
 403         setbrightness(gspca_dev);
 404
 405         reg_w_1(gspca_dev, TV8532_ADWIDTH_L, ADWIDTHL); /* 0x20; 0x0c */
 406         reg_w_1(gspca_dev, TV8532_ADWIDTH_H, ADWIDTHH); /* 0x0d */
 407
 408         /************************************************/
 409         reg_w_1(gspca_dev, TV8532_QUANT_COMP,
 410                         TESTCOMP);      /* 0x72 compressed mode 0x28 */
 411         if (gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv) {
 412                 /* 176x144 */
 413                 reg_w_1(gspca_dev, TV8532_MODE_PACKET,
 414                         QCIFLINE);      /* 0x84; // CIF | 4 packet 0x29 */
 415         } else {
 416                 /* 352x288 */
 417                 reg_w_1(gspca_dev, TV8532_MODE_PACKET,
 418                         TESTLINE);      /* 0x84; // CIF | 4 packet 0x29 */
 419         }
 420         /************************************************/
 421         reg_w_1(gspca_dev, TV8532_SETCLK,
 422                         TESTCLK);               /* 0x48; //0x08; 0x2c */
 423         reg_w_1(gspca_dev, TV8532_POINT_L,
 424                         TESTPTL);               /* 0x38; 0x2d */
 425         reg_w_1(gspca_dev, TV8532_POINT_H,
 426                         TESTPTH);               /* 0x04; 0x2e */
 427         reg_w_1(gspca_dev, TV8532_POINTB_L,
 428                         TESTPTBL);              /* 0x04; 0x2f */
 429         reg_w_1(gspca_dev, TV8532_POINTB_H,
 430                         TESTPTBH);              /* 0x04; 0x30 */
 431         reg_w_1(gspca_dev, TV8532_PART_CTRL,
 432                         TV8532_CMD_UPDATE);     /* 0x00<-0x84 */
 433         /************************************************/
 434         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01);    /* 0x31 */
 435         msleep(200);
 436         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00);    /* 0x31 */
 437         /************************************************/
 438         tv_8532_setReg(gspca_dev);
 439         /************************************************/
 440         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 441         /************************************************/
 442         tv_8532_setReg(gspca_dev);
 443         /************************************************/
 444         tv_8532_PollReg(gspca_dev);
 445         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00);    /* 0x31 */
 446 }
 447
 448 static void sd_stopN(struct gspca_dev *gspca_dev)
 449 {
 450         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 451 }
 452
 453 static void sd_stop0(struct gspca_dev *gspca_dev)
 454 {
 455 }
 456
 457 static void sd_close(struct gspca_dev *gspca_dev)
 458 {
 459 }
 460
 461 static void tv8532_preprocess(struct gspca_dev *gspca_dev)
 462 {
 463         struct sd *sd = (struct sd *) gspca_dev;
 464 /* we should received a whole frame with header and EOL marker
 465  * in gspca_dev->tmpbuf and return a GBRG pattern in gspca_dev->tmpbuf2
 466  * sequence 2bytes header the Alternate pixels bayer GB 4 bytes
 467  * Alternate pixels bayer RG 4 bytes EOL */
 468         int width = gspca_dev->width;
 469         int height = gspca_dev->height;
 470         unsigned char *dst = sd->tmpbuf2;
 471         unsigned char *data = sd->tmpbuf;
 472         int i;
 473
 474         /* precompute where is the good bayer line */
 475         if (((data[3] + data[width + 7]) >> 1)
 476             + (data[4] >> 2)
 477             + (data[width + 6] >> 1) >= ((data[2] + data[width + 6]) >> 1)
 478             + (data[3] >> 2)
 479             + (data[width + 5] >> 1))
 480                 data += 3;
 481         else
 482                 data += 2;
 483         for (i = 0; i < height / 2; i++) {
 484                 memcpy(dst, data, width);
 485                 data += width + 3;
 486                 dst += width;
 487                 memcpy(dst, data, width);
 488                 data += width + 7;
 489                 dst += width;
 490         }
 491 }
 492
 493 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 494                         struct gspca_frame *frame,      /* target */
 495                         __u8 *data,                     /* isoc packet */
 496                         int len)                        /* iso packet length */
 497 {
 498         struct sd *sd = (struct sd *) gspca_dev;
 499
 500         if (data[0] != 0x80) {
 501                 sd->packet++;
 502                 if (sd->buflen + len > sizeof sd->tmpbuf) {
 503                         if (gspca_dev->last_packet_type != DISCARD_PACKET) {
 504                                 PDEBUG(D_PACK, "buffer overflow");
 505                                 gspca_dev->last_packet_type = DISCARD_PACKET;
 506                         }
 507                         return;
 508                 }
 509                 memcpy(&sd->tmpbuf[sd->buflen], data, len);
 510                 sd->buflen += len;
 511                 return;
 512         }
 513
 514         /* here we detect 0x80 */
 515         /* counter is limited so we need few header for a frame :) */
 516
 517         /* header 0x80 0x80 0x80 0x80 0x80 */
 518         /* packet  00   63  127  145  00   */
 519         /* sof     0     1   1    0    0   */
 520
 521         /* update sequence */
 522         if (sd->packet == 63 || sd->packet == 127)
 523                 sd->synchro = 1;
 524
 525         /* is there a frame start ? */
 526         if (sd->packet >= (gspca_dev->height >> 1) - 1) {
 527                 PDEBUG(D_PACK, "SOF > %d packet %d", sd->synchro,
 528                        sd->packet);
 529                 if (!sd->synchro) {     /* start of frame */
 530                         if (gspca_dev->last_packet_type == FIRST_PACKET) {
 531                                 tv8532_preprocess(gspca_dev);
 532                                 frame = gspca_frame_add(gspca_dev,
 533                                                         LAST_PACKET,
 534                                                         frame, sd->tmpbuf2,
 535                                                         gspca_dev->width *
 536                                                             gspca_dev->width);
 537                         }
 538                         gspca_frame_add(gspca_dev, FIRST_PACKET,
 539                                         frame, data, 0);
 540                         memcpy(sd->tmpbuf, data, len);
 541                         sd->buflen = len;
 542                         sd->packet = 0;
 543                         return;
 544                 }
 545                 if (gspca_dev->last_packet_type != DISCARD_PACKET) {
 546                         PDEBUG(D_PACK,
 547                                "Warning wrong TV8532 frame detection %d",
 548                                sd->packet);
 549                         gspca_dev->last_packet_type = DISCARD_PACKET;
 550                 }
 551                 return;
 552         }
 553
 554         if (!sd->synchro) {
 555                 /* Drop packet frame corrupt */
 556                 PDEBUG(D_PACK, "DROP SOF %d packet %d",
 557                        sd->synchro, sd->packet);
 558                 sd->packet = 0;
 559                 gspca_dev->last_packet_type = DISCARD_PACKET;
 560                 return;
 561         }
 562         sd->synchro = 1;
 563         sd->packet++;
 564         memcpy(&sd->tmpbuf[sd->buflen], data, len);
 565         sd->buflen += len;
 566 }
 567
 568 static void setcontrast(struct gspca_dev *gspca_dev)
 569 {
 570 }
 571
 572 static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val)
 573 {
 574         struct sd *sd = (struct sd *) gspca_dev;
 575
 576         sd->brightness = val;
 577         if (gspca_dev->streaming)
 578                 setbrightness(gspca_dev);
 579         return 0;
 580 }
 581
 582 static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val)
 583 {
 584         struct sd *sd = (struct sd *) gspca_dev;
 585
 586         *val = sd->brightness;
 587         return 0;
 588 }
 589
 590 static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val)
 591 {
 592         struct sd *sd = (struct sd *) gspca_dev;
 593
 594         sd->contrast = val;
 595         if (gspca_dev->streaming)
 596                 setcontrast(gspca_dev);
 597         return 0;
 598 }
 599
 600 static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val)
 601 {
 602         struct sd *sd = (struct sd *) gspca_dev;
 603
 604         *val = sd->contrast;
 605         return 0;
 606 }
 607
 608 /* sub-driver description */
 609 static const struct sd_desc sd_desc = {
 610         .name = MODULE_NAME,
 611         .ctrls = sd_ctrls,
 612         .nctrls = ARRAY_SIZE(sd_ctrls),
 613         .config = sd_config,
 614         .open = sd_open,
 615         .start = sd_start,
 616         .stopN = sd_stopN,
 617         .stop0 = sd_stop0,
 618         .close = sd_close,
 619         .pkt_scan = sd_pkt_scan,
 620 };
 621
 622 /* -- module initialisation -- */
 623 static const __devinitdata struct usb_device_id device_table[] = {
 624         {USB_DEVICE(0x046d, 0x0920)},
 625         {USB_DEVICE(0x046d, 0x0921)},
 626         {USB_DEVICE(0x0545, 0x808b)},
 627         {USB_DEVICE(0x0545, 0x8333)},
 628         {USB_DEVICE(0x0923, 0x010f)},
 629         {}
 630 };
 631
 632 MODULE_DEVICE_TABLE(usb, device_table);
 633
 634 /* -- device connect -- */
 635 static int sd_probe(struct usb_interface *intf,
 636                     const struct usb_device_id *id)
 637 {
 638         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 639                                THIS_MODULE);
 640 }
 641
 642 static struct usb_driver sd_driver = {
 643         .name = MODULE_NAME,
 644         .id_table = device_table,
 645         .probe = sd_probe,
 646         .disconnect = gspca_disconnect,
 647 };
 648
 649 /* -- module insert / remove -- */
 650 static int __init sd_mod_init(void)
 651 {
 652         if (usb_register(&sd_driver) < 0)
 653                 return -1;
 654         PDEBUG(D_PROBE, "registered");
 655         return 0;
 656 }
 657
 658 static void __exit sd_mod_exit(void)
 659 {
 660         usb_deregister(&sd_driver);
 661         PDEBUG(D_PROBE, "deregistered");
 662 }
 663
 664 module_init(sd_mod_init);
 665 module_exit(sd_mod_exit);