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