root/drivers/media/usb/gspca/touptek.c

DEFINITIONS

1. val_reply
2. reg_w
3. reg_w_buf
4. setexposure
5. gainify
6. setggain
7. setbgain
8. setrgain
9. configure_wh
10. configure_encrypted
11. configure
12. sd_config
13. sd_start
14. sd_pkt_scan
15. sd_init
16. sd_s_ctrl
17. sd_init_controls
18. sd_probe
19. sd_mod_init
20. sd_mod_exit

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * ToupTek UCMOS / AmScope MU series camera driver
   4  * TODO: contrast with ScopeTek / AmScope MDC cameras
   5  *
   6  * Copyright (C) 2012-2014 John McMaster <JohnDMcMaster@gmail.com>
   7  *
   8  * Special thanks to Bushing for helping with the decrypt algorithm and
   9  * Sean O'Sullivan / the Rensselaer Center for Open Source
  10  * Software (RCOS) for helping me learn kernel development
  11  */
  12 
  13 #include "gspca.h"
  14 
  15 #define MODULE_NAME "touptek"
  16 
  17 MODULE_AUTHOR("John McMaster");
  18 MODULE_DESCRIPTION("ToupTek UCMOS / Amscope MU microscope camera driver");
  19 MODULE_LICENSE("GPL");
  20 
  21 /*
  22  * Exposure reg is linear with exposure time
  23  * Exposure (sec), E (reg)
  24  * 0.000400, 0x0002
  25  * 0.001000, 0x0005
  26  * 0.005000, 0x0019
  27  * 0.020000, 0x0064
  28  * 0.080000, 0x0190
  29  * 0.400000, 0x07D0
  30  * 1.000000, 0x1388
  31  * 2.000000, 0x2710
  32  *
  33  * Three gain stages
  34  * 0x1000: master channel enable bit
  35  * 0x007F: low gain bits
  36  * 0x0080: medium gain bit
  37  * 0x0100: high gain bit
  38  * gain = enable * (1 + regH) * (1 + regM) * z * regL
  39  *
  40  * Gain implementation
  41  * Want to do something similar to mt9v011.c's set_balance
  42  *
  43  * Gain does not vary with resolution (checked 640x480 vs 1600x1200)
  44  *
  45  * Constant derivation:
  46  *
  47  * Raw data:
  48  * Gain,   GTOP,   B,     R,      GBOT
  49  * 1.00,   0x105C, 0x1068, 0x10C8, 0x105C
  50  * 1.20,   0x106E, 0x107E, 0x10D6, 0x106E
  51  * 1.40,   0x10C0, 0x10CA, 0x10E5, 0x10C0
  52  * 1.60,   0x10C9, 0x10D4, 0x10F3, 0x10C9
  53  * 1.80,   0x10D2, 0x10DE, 0x11C1, 0x10D2
  54  * 2.00,   0x10DC, 0x10E9, 0x11C8, 0x10DC
  55  * 2.20,   0x10E5, 0x10F3, 0x11CF, 0x10E5
  56  * 2.40,   0x10EE, 0x10FE, 0x11D7, 0x10EE
  57  * 2.60,   0x10F7, 0x11C4, 0x11DE, 0x10F7
  58  * 2.80,   0x11C0, 0x11CA, 0x11E5, 0x11C0
  59  * 3.00,   0x11C5, 0x11CF, 0x11ED, 0x11C5
  60  *
  61  * zR = 0.0069605943152454778
  62  *      about 3/431 = 0.0069605568445475635
  63  * zB = 0.0095695970695970703
  64  *      about 6/627 = 0.0095693779904306216
  65  * zG = 0.010889328063241107
  66  *      about 6/551 = 0.010889292196007259
  67  * about 10 bits for constant + 7 bits for value => at least 17 bit
  68  * intermediate with 32 bit ints should be fine for overflow etc
  69  * Essentially gains are in range 0-0x001FF
  70  *
  71  * However, V4L expects a main gain channel + R and B balance
  72  * To keep things simple for now saturate the values of balance is too high/low
  73  * This isn't really ideal but easy way to fit the Linux model
  74  *
  75  * Converted using gain model turns out to be quite linear:
  76  * Gain, GTOP, B, R, GBOT
  77  * 1.00, 92, 104, 144, 92
  78  * 1.20, 110, 126, 172, 110
  79  * 1.40, 128, 148, 202, 128
  80  * 1.60, 146, 168, 230, 146
  81  * 1.80, 164, 188, 260, 164
  82  * 2.00, 184, 210, 288, 184
  83  * 2.20, 202, 230, 316, 202
  84  * 2.40, 220, 252, 348, 220
  85  * 2.60, 238, 272, 376, 238
  86  * 2.80, 256, 296, 404, 256
  87  * 3.00, 276, 316, 436, 276
  88  *
  89  * Maximum gain is 0x7FF * 2 * 2 => 0x1FFC (8188)
  90  * or about 13 effective bits of gain
  91  * The highest the commercial driver goes in my setup 436
  92  * However, because could *maybe* damage circuits
  93  * limit the gain until have a reason to go higher
  94  * Solution: gain clipped and warning emitted
  95  */
  96 #define GAIN_MAX                511
  97 
  98 /* Frame sync is a short read */
  99 #define BULK_SIZE               0x4000
 100 
 101 /* MT9E001 reg names to give a rough approximation */
 102 #define REG_COARSE_INTEGRATION_TIME_    0x3012
 103 #define REG_GROUPED_PARAMETER_HOLD_     0x3022
 104 #define REG_MODE_SELECT                 0x0100
 105 #define REG_OP_SYS_CLK_DIV              0x030A
 106 #define REG_VT_SYS_CLK_DIV              0x0302
 107 #define REG_PRE_PLL_CLK_DIV             0x0304
 108 #define REG_VT_PIX_CLK_DIV              0x0300
 109 #define REG_OP_PIX_CLK_DIV              0x0308
 110 #define REG_PLL_MULTIPLIER              0x0306
 111 #define REG_COARSE_INTEGRATION_TIME_    0x3012
 112 #define REG_FRAME_LENGTH_LINES          0x0340
 113 #define REG_FRAME_LENGTH_LINES_         0x300A
 114 #define REG_GREEN1_GAIN                 0x3056
 115 #define REG_GREEN2_GAIN                 0x305C
 116 #define REG_GROUPED_PARAMETER_HOLD      0x0104
 117 #define REG_LINE_LENGTH_PCK_            0x300C
 118 #define REG_MODE_SELECT                 0x0100
 119 #define REG_PLL_MULTIPLIER              0x0306
 120 #define REG_READ_MODE                   0x3040
 121 #define REG_BLUE_GAIN                   0x3058
 122 #define REG_RED_GAIN                    0x305A
 123 #define REG_RESET_REGISTER              0x301A
 124 #define REG_SCALE_M                     0x0404
 125 #define REG_SCALING_MODE                0x0400
 126 #define REG_SOFTWARE_RESET              0x0103
 127 #define REG_X_ADDR_END                  0x0348
 128 #define REG_X_ADDR_START                0x0344
 129 #define REG_X_ADDR_START                0x0344
 130 #define REG_X_OUTPUT_SIZE               0x034C
 131 #define REG_Y_ADDR_END                  0x034A
 132 #define REG_Y_ADDR_START                0x0346
 133 #define REG_Y_OUTPUT_SIZE               0x034E
 134 
 135 
 136 /* specific webcam descriptor */
 137 struct sd {
 138         struct gspca_dev gspca_dev;     /* !! must be the first item */
 139         /* How many bytes this frame */
 140         unsigned int this_f;
 141 
 142         /*
 143         Device has separate gains for each Bayer quadrant
 144         V4L supports master gain which is referenced to G1/G2 and supplies
 145         individual balance controls for R/B
 146         */
 147         struct v4l2_ctrl *blue;
 148         struct v4l2_ctrl *red;
 149 };
 150 
 151 /* Used to simplify reg write error handling */
 152 struct cmd {
 153         u16 value;
 154         u16 index;
 155 };
 156 
 157 static const struct v4l2_pix_format vga_mode[] = {
 158         {800, 600,
 159                 V4L2_PIX_FMT_SGRBG8,
 160                 V4L2_FIELD_NONE,
 161                 .bytesperline = 800,
 162                 .sizeimage = 800 * 600,
 163                 .colorspace = V4L2_COLORSPACE_SRGB},
 164         {1600, 1200,
 165                 V4L2_PIX_FMT_SGRBG8,
 166                 V4L2_FIELD_NONE,
 167                 .bytesperline = 1600,
 168                 .sizeimage = 1600 * 1200,
 169                 .colorspace = V4L2_COLORSPACE_SRGB},
 170         {3264, 2448,
 171                 V4L2_PIX_FMT_SGRBG8,
 172                 V4L2_FIELD_NONE,
 173                 .bytesperline = 3264,
 174                 .sizeimage = 3264 * 2448,
 175                 .colorspace = V4L2_COLORSPACE_SRGB},
 176 };
 177 
 178 /*
 179  * As there's no known frame sync, the only way to keep synced is to try hard
 180  * to never miss any packets
 181  */
 182 #if MAX_NURBS < 4
 183 #error "Not enough URBs in the gspca table"
 184 #endif
 185 
 186 static int val_reply(struct gspca_dev *gspca_dev, const char *reply, int rc)
 187 {
 188         if (rc < 0) {
 189                 gspca_err(gspca_dev, "reply has error %d\n", rc);
 190                 return -EIO;
 191         }
 192         if (rc != 1) {
 193                 gspca_err(gspca_dev, "Bad reply size %d\n", rc);
 194                 return -EIO;
 195         }
 196         if (reply[0] != 0x08) {
 197                 gspca_err(gspca_dev, "Bad reply 0x%02x\n", (int)reply[0]);
 198                 return -EIO;
 199         }
 200         return 0;
 201 }
 202 
 203 static void reg_w(struct gspca_dev *gspca_dev, u16 value, u16 index)
 204 {
 205         char *buff = gspca_dev->usb_buf;
 206         int rc;
 207 
 208         gspca_dbg(gspca_dev, D_USBO,
 209                   "reg_w bReq=0x0B, bReqT=0xC0, wVal=0x%04X, wInd=0x%04X\n\n",
 210                   value, index);
 211         rc = usb_control_msg(gspca_dev->dev, usb_rcvctrlpipe(gspca_dev->dev, 0),
 212                 0x0B, 0xC0, value, index, buff, 1, 500);
 213         gspca_dbg(gspca_dev, D_USBO, "rc=%d, ret={0x%02x}\n", rc, (int)buff[0]);
 214         if (rc < 0) {
 215                 gspca_err(gspca_dev, "Failed reg_w(0x0B, 0xC0, 0x%04X, 0x%04X) w/ rc %d\n",
 216                           value, index, rc);
 217                 gspca_dev->usb_err = rc;
 218                 return;
 219         }
 220         if (val_reply(gspca_dev, buff, rc)) {
 221                 gspca_err(gspca_dev, "Bad reply to reg_w(0x0B, 0xC0, 0x%04X, 0x%04X\n",
 222                           value, index);
 223                 gspca_dev->usb_err = -EIO;
 224         }
 225 }
 226 
 227 static void reg_w_buf(struct gspca_dev *gspca_dev,
 228                 const struct cmd *p, int l)
 229 {
 230         do {
 231                 reg_w(gspca_dev, p->value, p->index);
 232                 p++;
 233         } while (--l > 0);
 234 }
 235 
 236 static void setexposure(struct gspca_dev *gspca_dev, s32 val)
 237 {
 238         u16 value;
 239         unsigned int w = gspca_dev->pixfmt.width;
 240 
 241         if (w == 800)
 242                 value = val * 5;
 243         else if (w == 1600)
 244                 value = val * 3;
 245         else if (w == 3264)
 246                 value = val * 3 / 2;
 247         else {
 248                 gspca_err(gspca_dev, "Invalid width %u\n", w);
 249                 gspca_dev->usb_err = -EINVAL;
 250                 return;
 251         }
 252         gspca_dbg(gspca_dev, D_STREAM, "exposure: 0x%04X ms\n\n", value);
 253         /* Wonder if there's a good reason for sending it twice */
 254         /* probably not but leave it in because...why not */
 255         reg_w(gspca_dev, value, REG_COARSE_INTEGRATION_TIME_);
 256         reg_w(gspca_dev, value, REG_COARSE_INTEGRATION_TIME_);
 257 }
 258 
 259 static int gainify(int in)
 260 {
 261         /*
 262          * TODO: check if there are any issues with corner cases
 263          * 0x000 (0):0x07F (127): regL
 264          * 0x080 (128) - 0x0FF (255): regM, regL
 265          * 0x100 (256) - max: regH, regM, regL
 266          */
 267         if (in <= 0x7F)
 268                 return 0x1000 | in;
 269         else if (in <= 0xFF)
 270                 return 0x1080 | in / 2;
 271         else
 272                 return 0x1180 | in / 4;
 273 }
 274 
 275 static void setggain(struct gspca_dev *gspca_dev, u16 global_gain)
 276 {
 277         u16 normalized;
 278 
 279         normalized = gainify(global_gain);
 280         gspca_dbg(gspca_dev, D_STREAM, "gain G1/G2 (0x%04X): 0x%04X (src 0x%04X)\n\n",
 281                   REG_GREEN1_GAIN,
 282                   normalized, global_gain);
 283 
 284         reg_w(gspca_dev, normalized, REG_GREEN1_GAIN);
 285         reg_w(gspca_dev, normalized, REG_GREEN2_GAIN);
 286 }
 287 
 288 static void setbgain(struct gspca_dev *gspca_dev,
 289                 u16 gain, u16 global_gain)
 290 {
 291         u16 normalized;
 292 
 293         normalized = global_gain +
 294                 ((u32)global_gain) * gain / GAIN_MAX;
 295         if (normalized > GAIN_MAX) {
 296                 gspca_dbg(gspca_dev, D_STREAM, "Truncating blue 0x%04X w/ value 0x%04X\n\n",
 297                           GAIN_MAX, normalized);
 298                 normalized = GAIN_MAX;
 299         }
 300         normalized = gainify(normalized);
 301         gspca_dbg(gspca_dev, D_STREAM, "gain B (0x%04X): 0x%04X w/ source 0x%04X\n\n",
 302                   REG_BLUE_GAIN, normalized, gain);
 303 
 304         reg_w(gspca_dev, normalized, REG_BLUE_GAIN);
 305 }
 306 
 307 static void setrgain(struct gspca_dev *gspca_dev,
 308                 u16 gain, u16 global_gain)
 309 {
 310         u16 normalized;
 311 
 312         normalized = global_gain +
 313                 ((u32)global_gain) * gain / GAIN_MAX;
 314         if (normalized > GAIN_MAX) {
 315                 gspca_dbg(gspca_dev, D_STREAM, "Truncating gain 0x%04X w/ value 0x%04X\n\n",
 316                           GAIN_MAX, normalized);
 317                 normalized = GAIN_MAX;
 318         }
 319         normalized = gainify(normalized);
 320         gspca_dbg(gspca_dev, D_STREAM, "gain R (0x%04X): 0x%04X w / source 0x%04X\n\n",
 321                   REG_RED_GAIN, normalized, gain);
 322 
 323         reg_w(gspca_dev, normalized, REG_RED_GAIN);
 324 }
 325 
 326 static void configure_wh(struct gspca_dev *gspca_dev)
 327 {
 328         unsigned int w = gspca_dev->pixfmt.width;
 329 
 330         gspca_dbg(gspca_dev, D_STREAM, "configure_wh\n\n");
 331 
 332         if (w == 800) {
 333                 static const struct cmd reg_init_res[] = {
 334                         {0x0060, REG_X_ADDR_START},
 335                         {0x0CD9, REG_X_ADDR_END},
 336                         {0x0036, REG_Y_ADDR_START},
 337                         {0x098F, REG_Y_ADDR_END},
 338                         {0x07C7, REG_READ_MODE},
 339                 };
 340 
 341                 reg_w_buf(gspca_dev,
 342                                reg_init_res, ARRAY_SIZE(reg_init_res));
 343         } else if (w == 1600) {
 344                 static const struct cmd reg_init_res[] = {
 345                         {0x009C, REG_X_ADDR_START},
 346                         {0x0D19, REG_X_ADDR_END},
 347                         {0x0068, REG_Y_ADDR_START},
 348                         {0x09C5, REG_Y_ADDR_END},
 349                         {0x06C3, REG_READ_MODE},
 350                 };
 351 
 352                 reg_w_buf(gspca_dev,
 353                                reg_init_res, ARRAY_SIZE(reg_init_res));
 354         } else if (w == 3264) {
 355                 static const struct cmd reg_init_res[] = {
 356                         {0x00E8, REG_X_ADDR_START},
 357                         {0x0DA7, REG_X_ADDR_END},
 358                         {0x009E, REG_Y_ADDR_START},
 359                         {0x0A2D, REG_Y_ADDR_END},
 360                         {0x0241, REG_READ_MODE},
 361                 };
 362 
 363                 reg_w_buf(gspca_dev,
 364                                reg_init_res, ARRAY_SIZE(reg_init_res));
 365         } else {
 366                 gspca_err(gspca_dev, "bad width %u\n", w);
 367                 gspca_dev->usb_err = -EINVAL;
 368                 return;
 369         }
 370 
 371         reg_w(gspca_dev, 0x0000, REG_SCALING_MODE);
 372         reg_w(gspca_dev, 0x0010, REG_SCALE_M);
 373         reg_w(gspca_dev, w, REG_X_OUTPUT_SIZE);
 374         reg_w(gspca_dev, gspca_dev->pixfmt.height, REG_Y_OUTPUT_SIZE);
 375 
 376         if (w == 800) {
 377                 reg_w(gspca_dev, 0x0384, REG_FRAME_LENGTH_LINES_);
 378                 reg_w(gspca_dev, 0x0960, REG_LINE_LENGTH_PCK_);
 379         } else if (w == 1600) {
 380                 reg_w(gspca_dev, 0x0640, REG_FRAME_LENGTH_LINES_);
 381                 reg_w(gspca_dev, 0x0FA0, REG_LINE_LENGTH_PCK_);
 382         } else if (w == 3264) {
 383                 reg_w(gspca_dev, 0x0B4B, REG_FRAME_LENGTH_LINES_);
 384                 reg_w(gspca_dev, 0x1F40, REG_LINE_LENGTH_PCK_);
 385         } else {
 386                 gspca_err(gspca_dev, "bad width %u\n", w);
 387                 gspca_dev->usb_err = -EINVAL;
 388                 return;
 389         }
 390 }
 391 
 392 /* Packets that were encrypted, no idea if the grouping is significant */
 393 static void configure_encrypted(struct gspca_dev *gspca_dev)
 394 {
 395         static const struct cmd reg_init_begin[] = {
 396                 {0x0100, REG_SOFTWARE_RESET},
 397                 {0x0000, REG_MODE_SELECT},
 398                 {0x0100, REG_GROUPED_PARAMETER_HOLD},
 399                 {0x0004, REG_VT_PIX_CLK_DIV},
 400                 {0x0001, REG_VT_SYS_CLK_DIV},
 401                 {0x0008, REG_OP_PIX_CLK_DIV},
 402                 {0x0001, REG_OP_SYS_CLK_DIV},
 403                 {0x0004, REG_PRE_PLL_CLK_DIV},
 404                 {0x0040, REG_PLL_MULTIPLIER},
 405                 {0x0000, REG_GROUPED_PARAMETER_HOLD},
 406                 {0x0100, REG_GROUPED_PARAMETER_HOLD},
 407         };
 408         static const struct cmd reg_init_end[] = {
 409                 {0x0000, REG_GROUPED_PARAMETER_HOLD},
 410                 {0x0301, 0x31AE},
 411                 {0x0805, 0x3064},
 412                 {0x0071, 0x3170},
 413                 {0x10DE, REG_RESET_REGISTER},
 414                 {0x0000, REG_MODE_SELECT},
 415                 {0x0010, REG_PLL_MULTIPLIER},
 416                 {0x0100, REG_MODE_SELECT},
 417         };
 418 
 419         gspca_dbg(gspca_dev, D_STREAM, "Encrypted begin, w = %u\n\n",
 420                   gspca_dev->pixfmt.width);
 421         reg_w_buf(gspca_dev, reg_init_begin, ARRAY_SIZE(reg_init_begin));
 422         configure_wh(gspca_dev);
 423         reg_w_buf(gspca_dev, reg_init_end, ARRAY_SIZE(reg_init_end));
 424         reg_w(gspca_dev, 0x0100, REG_GROUPED_PARAMETER_HOLD);
 425         reg_w(gspca_dev, 0x0000, REG_GROUPED_PARAMETER_HOLD);
 426 
 427         gspca_dbg(gspca_dev, D_STREAM, "Encrypted end\n\n");
 428 }
 429 
 430 static int configure(struct gspca_dev *gspca_dev)
 431 {
 432         int rc;
 433         char *buff = gspca_dev->usb_buf;
 434 
 435         gspca_dbg(gspca_dev, D_STREAM, "configure()\n\n");
 436 
 437         /*
 438          * First driver sets a sort of encryption key
 439          * A number of futur requests of this type have wValue and wIndex
 440          * encrypted as follows:
 441          * -Compute key = this wValue rotate left by 4 bits
 442          *      (decrypt.py rotates right because we are decrypting)
 443          * -Later packets encrypt packets by XOR'ing with key
 444          *      XOR encrypt/decrypt is symmetrical
 445          *      wValue, and wIndex are encrypted
 446          *      bRequest is not and bRequestType is always 0xC0
 447          *              This allows resyncing if key is unknown?
 448          * By setting 0 we XOR with 0 and the shifting and XOR drops out
 449          */
 450         rc = usb_control_msg(gspca_dev->dev, usb_rcvctrlpipe(gspca_dev->dev, 0),
 451                              0x16, 0xC0, 0x0000, 0x0000, buff, 2, 500);
 452         if (val_reply(gspca_dev, buff, rc)) {
 453                 gspca_err(gspca_dev, "failed key req\n");
 454                 return -EIO;
 455         }
 456 
 457         /*
 458          * Next does some sort of 2 packet challenge / response
 459          * evidence suggests its an Atmel I2C crypto part but nobody cares to
 460          * look
 461          * (to make sure its not cloned hardware?)
 462          * Ignore: I want to work with their hardware, not clone it
 463          * 16 bytes out challenge, requestType: 0x40
 464          * 16 bytes in response, requestType: 0xC0
 465          */
 466 
 467         rc = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0),
 468                              0x01, 0x40, 0x0001, 0x000F, NULL, 0, 500);
 469         if (rc < 0) {
 470                 gspca_err(gspca_dev, "failed to replay packet 176 w/ rc %d\n",
 471                           rc);
 472                 return rc;
 473         }
 474 
 475         rc = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0),
 476                              0x01, 0x40, 0x0000, 0x000F, NULL, 0, 500);
 477         if (rc < 0) {
 478                 gspca_err(gspca_dev, "failed to replay packet 178 w/ rc %d\n",
 479                           rc);
 480                 return rc;
 481         }
 482 
 483         rc = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0),
 484                              0x01, 0x40, 0x0001, 0x000F, NULL, 0, 500);
 485         if (rc < 0) {
 486                 gspca_err(gspca_dev, "failed to replay packet 180 w/ rc %d\n",
 487                           rc);
 488                 return rc;
 489         }
 490 
 491         /*
 492          * Serial number?  Doesn't seem to be required
 493          * cam1: \xE6\x0D\x00\x00, cam2: \x70\x19\x00\x00
 494          * rc = usb_control_msg(gspca_dev->dev,
 495          *                      usb_rcvctrlpipe(gspca_dev->dev, 0),
 496          *                      0x20, 0xC0, 0x0000, 0x0000, buff, 4, 500);
 497          */
 498 
 499         /* Large (EEPROM?) read, skip it since no idea what to do with it */
 500         gspca_dev->usb_err = 0;
 501         configure_encrypted(gspca_dev);
 502         if (gspca_dev->usb_err)
 503                 return gspca_dev->usb_err;
 504 
 505         /* Omitted this by accident, does not work without it */
 506         rc = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0),
 507                              0x01, 0x40, 0x0003, 0x000F, NULL, 0, 500);
 508         if (rc < 0) {
 509                 gspca_err(gspca_dev, "failed to replay final packet w/ rc %d\n",
 510                           rc);
 511                 return rc;
 512         }
 513 
 514         gspca_dbg(gspca_dev, D_STREAM, "Configure complete\n\n");
 515         return 0;
 516 }
 517 
 518 static int sd_config(struct gspca_dev *gspca_dev,
 519                      const struct usb_device_id *id)
 520 {
 521         gspca_dev->cam.cam_mode = vga_mode;
 522         gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
 523 
 524         /* Yes we want URBs and we want them now! */
 525         gspca_dev->cam.no_urb_create = 0;
 526         gspca_dev->cam.bulk_nurbs = 4;
 527         /* Largest size the windows driver uses */
 528         gspca_dev->cam.bulk_size = BULK_SIZE;
 529         /* Def need to use bulk transfers */
 530         gspca_dev->cam.bulk = 1;
 531 
 532         return 0;
 533 }
 534 
 535 static int sd_start(struct gspca_dev *gspca_dev)
 536 {
 537         struct sd *sd = (struct sd *) gspca_dev;
 538         int rc;
 539 
 540         sd->this_f = 0;
 541 
 542         rc = configure(gspca_dev);
 543         if (rc < 0) {
 544                 gspca_err(gspca_dev, "Failed configure\n");
 545                 return rc;
 546         }
 547         /* First two frames have messed up gains
 548         Drop them to avoid special cases in user apps? */
 549         return 0;
 550 }
 551 
 552 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 553                         u8 *data,       /* isoc packet */
 554                         int len)        /* iso packet length */
 555 {
 556         struct sd *sd = (struct sd *) gspca_dev;
 557 
 558         if (len != BULK_SIZE) {
 559                 /* can we finish a frame? */
 560                 if (sd->this_f + len == gspca_dev->pixfmt.sizeimage) {
 561                         gspca_frame_add(gspca_dev, LAST_PACKET, data, len);
 562                         gspca_dbg(gspca_dev, D_FRAM, "finish frame sz %u/%u w/ len %u\n\n",
 563                                   sd->this_f, gspca_dev->pixfmt.sizeimage, len);
 564                 /* lost some data, discard the frame */
 565                 } else {
 566                         gspca_frame_add(gspca_dev, DISCARD_PACKET, NULL, 0);
 567                         gspca_dbg(gspca_dev, D_FRAM, "abort frame sz %u/%u w/ len %u\n\n",
 568                                   sd->this_f, gspca_dev->pixfmt.sizeimage, len);
 569                 }
 570                 sd->this_f = 0;
 571         } else {
 572                 if (sd->this_f == 0)
 573                         gspca_frame_add(gspca_dev, FIRST_PACKET, data, len);
 574                 else
 575                         gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
 576                 sd->this_f += len;
 577         }
 578 }
 579 
 580 static int sd_init(struct gspca_dev *gspca_dev)
 581 {
 582         return 0;
 583 }
 584 
 585 static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
 586 {
 587         struct gspca_dev *gspca_dev =
 588                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
 589         struct sd *sd = (struct sd *) gspca_dev;
 590 
 591         gspca_dev->usb_err = 0;
 592 
 593         if (!gspca_dev->streaming)
 594                 return 0;
 595 
 596         switch (ctrl->id) {
 597         case V4L2_CID_EXPOSURE:
 598                 setexposure(gspca_dev, ctrl->val);
 599                 break;
 600         case V4L2_CID_GAIN:
 601                 /* gspca_dev->gain automatically updated */
 602                 setggain(gspca_dev, gspca_dev->gain->val);
 603                 break;
 604         case V4L2_CID_BLUE_BALANCE:
 605                 sd->blue->val = ctrl->val;
 606                 setbgain(gspca_dev, sd->blue->val, gspca_dev->gain->val);
 607                 break;
 608         case V4L2_CID_RED_BALANCE:
 609                 sd->red->val = ctrl->val;
 610                 setrgain(gspca_dev, sd->red->val, gspca_dev->gain->val);
 611                 break;
 612         }
 613         return gspca_dev->usb_err;
 614 }
 615 
 616 static const struct v4l2_ctrl_ops sd_ctrl_ops = {
 617         .s_ctrl = sd_s_ctrl,
 618 };
 619 
 620 static int sd_init_controls(struct gspca_dev *gspca_dev)
 621 {
 622         struct sd *sd = (struct sd *) gspca_dev;
 623         struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
 624 
 625         gspca_dev->vdev.ctrl_handler = hdl;
 626         v4l2_ctrl_handler_init(hdl, 4);
 627 
 628         gspca_dev->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 629         /* Mostly limited by URB timeouts */
 630         /* XXX: make dynamic based on frame rate? */
 631                 V4L2_CID_EXPOSURE, 0, 800, 1, 350);
 632         gspca_dev->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 633                         V4L2_CID_GAIN, 0, 511, 1, 128);
 634         sd->blue = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 635                         V4L2_CID_BLUE_BALANCE, 0, 1023, 1, 80);
 636         sd->red = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 637                         V4L2_CID_RED_BALANCE, 0, 1023, 1, 295);
 638 
 639         if (hdl->error) {
 640                 gspca_err(gspca_dev, "Could not initialize controls\n");
 641                 return hdl->error;
 642         }
 643         return 0;
 644 }
 645 
 646 /* sub-driver description */
 647 static const struct sd_desc sd_desc = {
 648         .name = MODULE_NAME,
 649         .config = sd_config,
 650         .init = sd_init,
 651         .init_controls = sd_init_controls,
 652         .start = sd_start,
 653         .pkt_scan = sd_pkt_scan,
 654 };
 655 
 656 /* Table of supported USB devices */
 657 static const struct usb_device_id device_table[] = {
 658         /* Commented out devices should be related */
 659         /* AS: AmScope, TT: ToupTek */
 660         /* { USB_DEVICE(0x0547, 0x6035) },  TT UCMOS00350KPA */
 661         /* { USB_DEVICE(0x0547, 0x6130) },  TT UCMOS01300KPA */
 662         /* { USB_DEVICE(0x0547, 0x6200) },  TT UCMOS02000KPA */
 663         /* { USB_DEVICE(0x0547, 0x6310) },  TT UCMOS03100KPA */
 664         /* { USB_DEVICE(0x0547, 0x6510) },  TT UCMOS05100KPA */
 665         /* { USB_DEVICE(0x0547, 0x6800) },  TT UCMOS08000KPA */
 666         /* { USB_DEVICE(0x0547, 0x6801) },  TT UCMOS08000KPB */
 667         { USB_DEVICE(0x0547, 0x6801) }, /* TT UCMOS08000KPB, AS MU800 */
 668         /* { USB_DEVICE(0x0547, 0x6900) },  TT UCMOS09000KPA */
 669         /* { USB_DEVICE(0x0547, 0x6901) },  TT UCMOS09000KPB */
 670         /* { USB_DEVICE(0x0547, 0x6010) },  TT UCMOS10000KPA */
 671         /* { USB_DEVICE(0x0547, 0x6014) },  TT UCMOS14000KPA */
 672         /* { USB_DEVICE(0x0547, 0x6131) },  TT UCMOS01300KMA */
 673         /* { USB_DEVICE(0x0547, 0x6511) },  TT UCMOS05100KMA */
 674         /* { USB_DEVICE(0x0547, 0x8080) },  TT UHCCD00800KPA */
 675         /* { USB_DEVICE(0x0547, 0x8140) },  TT UHCCD01400KPA */
 676         /* { USB_DEVICE(0x0547, 0x8141) },  TT EXCCD01400KPA */
 677         /* { USB_DEVICE(0x0547, 0x8200) },  TT UHCCD02000KPA */
 678         /* { USB_DEVICE(0x0547, 0x8201) },  TT UHCCD02000KPB */
 679         /* { USB_DEVICE(0x0547, 0x8310) },  TT UHCCD03100KPA */
 680         /* { USB_DEVICE(0x0547, 0x8500) },  TT UHCCD05000KPA */
 681         /* { USB_DEVICE(0x0547, 0x8510) },  TT UHCCD05100KPA */
 682         /* { USB_DEVICE(0x0547, 0x8600) },  TT UHCCD06000KPA */
 683         /* { USB_DEVICE(0x0547, 0x8800) },  TT UHCCD08000KPA */
 684         /* { USB_DEVICE(0x0547, 0x8315) },  TT UHCCD03150KPA */
 685         /* { USB_DEVICE(0x0547, 0x7800) },  TT UHCCD00800KMA */
 686         /* { USB_DEVICE(0x0547, 0x7140) },  TT UHCCD01400KMA */
 687         /* { USB_DEVICE(0x0547, 0x7141) },  TT UHCCD01400KMB */
 688         /* { USB_DEVICE(0x0547, 0x7200) },  TT UHCCD02000KMA */
 689         /* { USB_DEVICE(0x0547, 0x7315) },  TT UHCCD03150KMA */
 690         { }
 691 };
 692 MODULE_DEVICE_TABLE(usb, device_table);
 693 
 694 static int sd_probe(struct usb_interface *intf,
 695                     const struct usb_device_id *id)
 696 {
 697         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 698                              THIS_MODULE);
 699 }
 700 
 701 static struct usb_driver sd_driver = {
 702         .name = MODULE_NAME,
 703         .id_table = device_table,
 704         .probe = sd_probe,
 705         .disconnect = gspca_disconnect,
 706 #ifdef CONFIG_PM
 707         .suspend = gspca_suspend,
 708         .resume = gspca_resume,
 709 #endif
 710 };
 711 
 712 static int __init sd_mod_init(void)
 713 {
 714         int ret;
 715 
 716         ret = usb_register(&sd_driver);
 717         if (ret < 0)
 718                 return ret;
 719         return 0;
 720 }
 721 static void __exit sd_mod_exit(void)
 722 {
 723         usb_deregister(&sd_driver);
 724 }
 725 
 726 module_init(sd_mod_init);
 727 module_exit(sd_mod_exit);