root/drivers/media/usb/gspca/stv06xx/stv06xx.c

DEFINITIONS

1. stv06xx_write_bridge
2. stv06xx_read_bridge
3. stv06xx_write_sensor
4. stv06xx_write_sensor_finish
5. stv06xx_write_sensor_bytes
6. stv06xx_write_sensor_words
7. stv06xx_read_sensor
8. stv06xx_dump_bridge
9. stv06xx_init
10. stv06xx_init_controls
11. stv06xx_start
12. stv06xx_isoc_init
13. stv06xx_isoc_nego
14. stv06xx_stopN
15. stv06xx_pkt_scan
16. sd_int_pkt_scan
17. stv06xx_config
18. sd_probe
19. sd_disconnect

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
   4  *                    Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
   5  * Copyright (c) 2002, 2003 Tuukka Toivonen
   6  * Copyright (c) 2008 Erik Andrén
   7  *
   8  * P/N 861037:      Sensor HDCS1000        ASIC STV0600
   9  * P/N 861050-0010: Sensor HDCS1000        ASIC STV0600
  10  * P/N 861050-0020: Sensor Photobit PB100  ASIC STV0600-1 - QuickCam Express
  11  * P/N 861055:      Sensor ST VV6410       ASIC STV0610   - LEGO cam
  12  * P/N 861075-0040: Sensor HDCS1000        ASIC
  13  * P/N 961179-0700: Sensor ST VV6410       ASIC STV0602   - Dexxa WebCam USB
  14  * P/N 861040-0000: Sensor ST VV6410       ASIC STV0610   - QuickCam Web
  15  */
  16 
  17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  18 
  19 #include <linux/input.h>
  20 #include "stv06xx_sensor.h"
  21 
  22 MODULE_AUTHOR("Erik Andrén");
  23 MODULE_DESCRIPTION("STV06XX USB Camera Driver");
  24 MODULE_LICENSE("GPL");
  25 
  26 static bool dump_bridge;
  27 static bool dump_sensor;
  28 
  29 int stv06xx_write_bridge(struct sd *sd, u16 address, u16 i2c_data)
  30 {
  31         int err;
  32         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
  33         struct usb_device *udev = sd->gspca_dev.dev;
  34         __u8 *buf = sd->gspca_dev.usb_buf;
  35 
  36         u8 len = (i2c_data > 0xff) ? 2 : 1;
  37 
  38         buf[0] = i2c_data & 0xff;
  39         buf[1] = (i2c_data >> 8) & 0xff;
  40 
  41         err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  42                               0x04, 0x40, address, 0, buf, len,
  43                               STV06XX_URB_MSG_TIMEOUT);
  44 
  45         gspca_dbg(gspca_dev, D_CONF, "Written 0x%x to address 0x%x, status: %d\n",
  46                   i2c_data, address, err);
  47 
  48         return (err < 0) ? err : 0;
  49 }
  50 
  51 int stv06xx_read_bridge(struct sd *sd, u16 address, u8 *i2c_data)
  52 {
  53         int err;
  54         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
  55         struct usb_device *udev = sd->gspca_dev.dev;
  56         __u8 *buf = sd->gspca_dev.usb_buf;
  57 
  58         err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
  59                               0x04, 0xc0, address, 0, buf, 1,
  60                               STV06XX_URB_MSG_TIMEOUT);
  61 
  62         *i2c_data = buf[0];
  63 
  64         gspca_dbg(gspca_dev, D_CONF, "Reading 0x%x from address 0x%x, status %d\n",
  65                   *i2c_data, address, err);
  66 
  67         return (err < 0) ? err : 0;
  68 }
  69 
  70 /* Wraps the normal write sensor bytes / words functions for writing a
  71    single value */
  72 int stv06xx_write_sensor(struct sd *sd, u8 address, u16 value)
  73 {
  74         if (sd->sensor->i2c_len == 2) {
  75                 u16 data[2] = { address, value };
  76                 return stv06xx_write_sensor_words(sd, data, 1);
  77         } else {
  78                 u8 data[2] = { address, value };
  79                 return stv06xx_write_sensor_bytes(sd, data, 1);
  80         }
  81 }
  82 
  83 static int stv06xx_write_sensor_finish(struct sd *sd)
  84 {
  85         int err = 0;
  86 
  87         if (sd->bridge == BRIDGE_STV610) {
  88                 struct usb_device *udev = sd->gspca_dev.dev;
  89                 __u8 *buf = sd->gspca_dev.usb_buf;
  90 
  91                 buf[0] = 0;
  92                 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  93                                       0x04, 0x40, 0x1704, 0, buf, 1,
  94                                       STV06XX_URB_MSG_TIMEOUT);
  95         }
  96 
  97         return (err < 0) ? err : 0;
  98 }
  99 
 100 int stv06xx_write_sensor_bytes(struct sd *sd, const u8 *data, u8 len)
 101 {
 102         int err, i, j;
 103         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 104         struct usb_device *udev = sd->gspca_dev.dev;
 105         __u8 *buf = sd->gspca_dev.usb_buf;
 106 
 107         gspca_dbg(gspca_dev, D_CONF, "I2C: Command buffer contains %d entries\n",
 108                   len);
 109         for (i = 0; i < len;) {
 110                 /* Build the command buffer */
 111                 memset(buf, 0, I2C_BUFFER_LENGTH);
 112                 for (j = 0; j < I2C_MAX_BYTES && i < len; j++, i++) {
 113                         buf[j] = data[2*i];
 114                         buf[0x10 + j] = data[2*i+1];
 115                         gspca_dbg(gspca_dev, D_CONF, "I2C: Writing 0x%02x to reg 0x%02x\n",
 116                                   data[2*i+1], data[2*i]);
 117                 }
 118                 buf[0x20] = sd->sensor->i2c_addr;
 119                 buf[0x21] = j - 1; /* Number of commands to send - 1 */
 120                 buf[0x22] = I2C_WRITE_CMD;
 121                 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 122                                       0x04, 0x40, 0x0400, 0, buf,
 123                                       I2C_BUFFER_LENGTH,
 124                                       STV06XX_URB_MSG_TIMEOUT);
 125                 if (err < 0)
 126                         return err;
 127         }
 128         return stv06xx_write_sensor_finish(sd);
 129 }
 130 
 131 int stv06xx_write_sensor_words(struct sd *sd, const u16 *data, u8 len)
 132 {
 133         int err, i, j;
 134         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 135         struct usb_device *udev = sd->gspca_dev.dev;
 136         __u8 *buf = sd->gspca_dev.usb_buf;
 137 
 138         gspca_dbg(gspca_dev, D_CONF, "I2C: Command buffer contains %d entries\n",
 139                   len);
 140 
 141         for (i = 0; i < len;) {
 142                 /* Build the command buffer */
 143                 memset(buf, 0, I2C_BUFFER_LENGTH);
 144                 for (j = 0; j < I2C_MAX_WORDS && i < len; j++, i++) {
 145                         buf[j] = data[2*i];
 146                         buf[0x10 + j * 2] = data[2*i+1];
 147                         buf[0x10 + j * 2 + 1] = data[2*i+1] >> 8;
 148                         gspca_dbg(gspca_dev, D_CONF, "I2C: Writing 0x%04x to reg 0x%02x\n",
 149                                   data[2*i+1], data[2*i]);
 150                 }
 151                 buf[0x20] = sd->sensor->i2c_addr;
 152                 buf[0x21] = j - 1; /* Number of commands to send - 1 */
 153                 buf[0x22] = I2C_WRITE_CMD;
 154                 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 155                                 0x04, 0x40, 0x0400, 0, buf,
 156                                 I2C_BUFFER_LENGTH,
 157                                 STV06XX_URB_MSG_TIMEOUT);
 158                 if (err < 0)
 159                         return err;
 160         }
 161         return stv06xx_write_sensor_finish(sd);
 162 }
 163 
 164 int stv06xx_read_sensor(struct sd *sd, const u8 address, u16 *value)
 165 {
 166         int err;
 167         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 168         struct usb_device *udev = sd->gspca_dev.dev;
 169         __u8 *buf = sd->gspca_dev.usb_buf;
 170 
 171         err = stv06xx_write_bridge(sd, STV_I2C_FLUSH, sd->sensor->i2c_flush);
 172         if (err < 0)
 173                 return err;
 174 
 175         /* Clear mem */
 176         memset(buf, 0, I2C_BUFFER_LENGTH);
 177 
 178         buf[0] = address;
 179         buf[0x20] = sd->sensor->i2c_addr;
 180         buf[0x21] = 0;
 181 
 182         /* Read I2C register */
 183         buf[0x22] = I2C_READ_CMD;
 184 
 185         err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 186                               0x04, 0x40, 0x1400, 0, buf, I2C_BUFFER_LENGTH,
 187                               STV06XX_URB_MSG_TIMEOUT);
 188         if (err < 0) {
 189                 pr_err("I2C: Read error writing address: %d\n", err);
 190                 return err;
 191         }
 192 
 193         err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 194                               0x04, 0xc0, 0x1410, 0, buf, sd->sensor->i2c_len,
 195                               STV06XX_URB_MSG_TIMEOUT);
 196         if (sd->sensor->i2c_len == 2)
 197                 *value = buf[0] | (buf[1] << 8);
 198         else
 199                 *value = buf[0];
 200 
 201         gspca_dbg(gspca_dev, D_CONF, "I2C: Read 0x%x from address 0x%x, status: %d\n",
 202                   *value, address, err);
 203 
 204         return (err < 0) ? err : 0;
 205 }
 206 
 207 /* Dumps all bridge registers */
 208 static void stv06xx_dump_bridge(struct sd *sd)
 209 {
 210         int i;
 211         u8 data, buf;
 212 
 213         pr_info("Dumping all stv06xx bridge registers\n");
 214         for (i = 0x1400; i < 0x160f; i++) {
 215                 stv06xx_read_bridge(sd, i, &data);
 216 
 217                 pr_info("Read 0x%x from address 0x%x\n", data, i);
 218         }
 219 
 220         pr_info("Testing stv06xx bridge registers for writability\n");
 221         for (i = 0x1400; i < 0x160f; i++) {
 222                 stv06xx_read_bridge(sd, i, &data);
 223                 buf = data;
 224 
 225                 stv06xx_write_bridge(sd, i, 0xff);
 226                 stv06xx_read_bridge(sd, i, &data);
 227                 if (data == 0xff)
 228                         pr_info("Register 0x%x is read/write\n", i);
 229                 else if (data != buf)
 230                         pr_info("Register 0x%x is read/write, but only partially\n",
 231                                 i);
 232                 else
 233                         pr_info("Register 0x%x is read-only\n", i);
 234 
 235                 stv06xx_write_bridge(sd, i, buf);
 236         }
 237 }
 238 
 239 /* this function is called at probe and resume time */
 240 static int stv06xx_init(struct gspca_dev *gspca_dev)
 241 {
 242         struct sd *sd = (struct sd *) gspca_dev;
 243         int err;
 244 
 245         gspca_dbg(gspca_dev, D_PROBE, "Initializing camera\n");
 246 
 247         /* Let the usb init settle for a bit
 248            before performing the initialization */
 249         msleep(250);
 250 
 251         err = sd->sensor->init(sd);
 252 
 253         if (dump_sensor && sd->sensor->dump)
 254                 sd->sensor->dump(sd);
 255 
 256         return (err < 0) ? err : 0;
 257 }
 258 
 259 /* this function is called at probe time */
 260 static int stv06xx_init_controls(struct gspca_dev *gspca_dev)
 261 {
 262         struct sd *sd = (struct sd *) gspca_dev;
 263 
 264         gspca_dbg(gspca_dev, D_PROBE, "Initializing controls\n");
 265 
 266         gspca_dev->vdev.ctrl_handler = &gspca_dev->ctrl_handler;
 267         return sd->sensor->init_controls(sd);
 268 }
 269 
 270 /* Start the camera */
 271 static int stv06xx_start(struct gspca_dev *gspca_dev)
 272 {
 273         struct sd *sd = (struct sd *) gspca_dev;
 274         struct usb_host_interface *alt;
 275         struct usb_interface *intf;
 276         int err, packet_size;
 277 
 278         intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
 279         alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
 280         if (!alt) {
 281                 gspca_err(gspca_dev, "Couldn't get altsetting\n");
 282                 return -EIO;
 283         }
 284 
 285         if (alt->desc.bNumEndpoints < 1)
 286                 return -ENODEV;
 287 
 288         packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
 289         err = stv06xx_write_bridge(sd, STV_ISO_SIZE_L, packet_size);
 290         if (err < 0)
 291                 return err;
 292 
 293         /* Prepare the sensor for start */
 294         err = sd->sensor->start(sd);
 295         if (err < 0)
 296                 goto out;
 297 
 298         /* Start isochronous streaming */
 299         err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 1);
 300 
 301 out:
 302         if (err < 0)
 303                 gspca_dbg(gspca_dev, D_STREAM, "Starting stream failed\n");
 304         else
 305                 gspca_dbg(gspca_dev, D_STREAM, "Started streaming\n");
 306 
 307         return (err < 0) ? err : 0;
 308 }
 309 
 310 static int stv06xx_isoc_init(struct gspca_dev *gspca_dev)
 311 {
 312         struct usb_interface_cache *intfc;
 313         struct usb_host_interface *alt;
 314         struct sd *sd = (struct sd *) gspca_dev;
 315 
 316         intfc = gspca_dev->dev->actconfig->intf_cache[0];
 317 
 318         if (intfc->num_altsetting < 2)
 319                 return -ENODEV;
 320 
 321         alt = &intfc->altsetting[1];
 322 
 323         if (alt->desc.bNumEndpoints < 1)
 324                 return -ENODEV;
 325 
 326         /* Start isoc bandwidth "negotiation" at max isoc bandwidth */
 327         alt->endpoint[0].desc.wMaxPacketSize =
 328                 cpu_to_le16(sd->sensor->max_packet_size[gspca_dev->curr_mode]);
 329 
 330         return 0;
 331 }
 332 
 333 static int stv06xx_isoc_nego(struct gspca_dev *gspca_dev)
 334 {
 335         int ret, packet_size, min_packet_size;
 336         struct usb_host_interface *alt;
 337         struct sd *sd = (struct sd *) gspca_dev;
 338 
 339         /*
 340          * Existence of altsetting and endpoint was verified in
 341          * stv06xx_isoc_init()
 342          */
 343         alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
 344         packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
 345         min_packet_size = sd->sensor->min_packet_size[gspca_dev->curr_mode];
 346         if (packet_size <= min_packet_size)
 347                 return -EIO;
 348 
 349         packet_size -= 100;
 350         if (packet_size < min_packet_size)
 351                 packet_size = min_packet_size;
 352         alt->endpoint[0].desc.wMaxPacketSize = cpu_to_le16(packet_size);
 353 
 354         ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
 355         if (ret < 0)
 356                 gspca_err(gspca_dev, "set alt 1 err %d\n", ret);
 357 
 358         return ret;
 359 }
 360 
 361 static void stv06xx_stopN(struct gspca_dev *gspca_dev)
 362 {
 363         int err;
 364         struct sd *sd = (struct sd *) gspca_dev;
 365 
 366         /* stop ISO-streaming */
 367         err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 0);
 368         if (err < 0)
 369                 goto out;
 370 
 371         err = sd->sensor->stop(sd);
 372 
 373 out:
 374         if (err < 0)
 375                 gspca_dbg(gspca_dev, D_STREAM, "Failed to stop stream\n");
 376         else
 377                 gspca_dbg(gspca_dev, D_STREAM, "Stopped streaming\n");
 378 }
 379 
 380 /*
 381  * Analyse an USB packet of the data stream and store it appropriately.
 382  * Each packet contains an integral number of chunks. Each chunk has
 383  * 2-bytes identification, followed by 2-bytes that describe the chunk
 384  * length. Known/guessed chunk identifications are:
 385  * 8001/8005/C001/C005 - Begin new frame
 386  * 8002/8006/C002/C006 - End frame
 387  * 0200/4200           - Contains actual image data, bayer or compressed
 388  * 0005                - 11 bytes of unknown data
 389  * 0100                - 2 bytes of unknown data
 390  * The 0005 and 0100 chunks seem to appear only in compressed stream.
 391  */
 392 static void stv06xx_pkt_scan(struct gspca_dev *gspca_dev,
 393                         u8 *data,                       /* isoc packet */
 394                         int len)                        /* iso packet length */
 395 {
 396         struct sd *sd = (struct sd *) gspca_dev;
 397 
 398         gspca_dbg(gspca_dev, D_PACK, "Packet of length %d arrived\n", len);
 399 
 400         /* A packet may contain several frames
 401            loop until the whole packet is reached */
 402         while (len) {
 403                 int id, chunk_len;
 404 
 405                 if (len < 4) {
 406                         gspca_dbg(gspca_dev, D_PACK, "Packet is smaller than 4 bytes\n");
 407                         return;
 408                 }
 409 
 410                 /* Capture the id */
 411                 id = (data[0] << 8) | data[1];
 412 
 413                 /* Capture the chunk length */
 414                 chunk_len = (data[2] << 8) | data[3];
 415                 gspca_dbg(gspca_dev, D_PACK, "Chunk id: %x, length: %d\n",
 416                           id, chunk_len);
 417 
 418                 data += 4;
 419                 len -= 4;
 420 
 421                 if (len < chunk_len) {
 422                         gspca_err(gspca_dev, "URB packet length is smaller than the specified chunk length\n");
 423                         gspca_dev->last_packet_type = DISCARD_PACKET;
 424                         return;
 425                 }
 426 
 427                 /* First byte seem to be 02=data 2nd byte is unknown??? */
 428                 if (sd->bridge == BRIDGE_ST6422 && (id & 0xff00) == 0x0200)
 429                         goto frame_data;
 430 
 431                 switch (id) {
 432                 case 0x0200:
 433                 case 0x4200:
 434 frame_data:
 435                         gspca_dbg(gspca_dev, D_PACK, "Frame data packet detected\n");
 436 
 437                         if (sd->to_skip) {
 438                                 int skip = (sd->to_skip < chunk_len) ?
 439                                             sd->to_skip : chunk_len;
 440                                 data += skip;
 441                                 len -= skip;
 442                                 chunk_len -= skip;
 443                                 sd->to_skip -= skip;
 444                         }
 445 
 446                         gspca_frame_add(gspca_dev, INTER_PACKET,
 447                                         data, chunk_len);
 448                         break;
 449 
 450                 case 0x8001:
 451                 case 0x8005:
 452                 case 0xc001:
 453                 case 0xc005:
 454                         gspca_dbg(gspca_dev, D_PACK, "Starting new frame\n");
 455 
 456                         /* Create a new frame, chunk length should be zero */
 457                         gspca_frame_add(gspca_dev, FIRST_PACKET,
 458                                         NULL, 0);
 459 
 460                         if (sd->bridge == BRIDGE_ST6422)
 461                                 sd->to_skip = gspca_dev->pixfmt.width * 4;
 462 
 463                         if (chunk_len)
 464                                 gspca_err(gspca_dev, "Chunk length is non-zero on a SOF\n");
 465                         break;
 466 
 467                 case 0x8002:
 468                 case 0x8006:
 469                 case 0xc002:
 470                         gspca_dbg(gspca_dev, D_PACK, "End of frame detected\n");
 471 
 472                         /* Complete the last frame (if any) */
 473                         gspca_frame_add(gspca_dev, LAST_PACKET,
 474                                         NULL, 0);
 475 
 476                         if (chunk_len)
 477                                 gspca_err(gspca_dev, "Chunk length is non-zero on a EOF\n");
 478                         break;
 479 
 480                 case 0x0005:
 481                         gspca_dbg(gspca_dev, D_PACK, "Chunk 0x005 detected\n");
 482                         /* Unknown chunk with 11 bytes of data,
 483                            occurs just before end of each frame
 484                            in compressed mode */
 485                         break;
 486 
 487                 case 0x0100:
 488                         gspca_dbg(gspca_dev, D_PACK, "Chunk 0x0100 detected\n");
 489                         /* Unknown chunk with 2 bytes of data,
 490                            occurs 2-3 times per USB interrupt */
 491                         break;
 492                 case 0x42ff:
 493                         gspca_dbg(gspca_dev, D_PACK, "Chunk 0x42ff detected\n");
 494                         /* Special chunk seen sometimes on the ST6422 */
 495                         break;
 496                 default:
 497                         gspca_dbg(gspca_dev, D_PACK, "Unknown chunk 0x%04x detected\n",
 498                                   id);
 499                         /* Unknown chunk */
 500                 }
 501                 data    += chunk_len;
 502                 len     -= chunk_len;
 503         }
 504 }
 505 
 506 #if IS_ENABLED(CONFIG_INPUT)
 507 static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
 508                         u8 *data,               /* interrupt packet data */
 509                         int len)                /* interrupt packet length */
 510 {
 511         int ret = -EINVAL;
 512 
 513         if (len == 1 && (data[0] == 0x80 || data[0] == 0x10)) {
 514                 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
 515                 input_sync(gspca_dev->input_dev);
 516                 ret = 0;
 517         }
 518 
 519         if (len == 1 && (data[0] == 0x88 || data[0] == 0x11)) {
 520                 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
 521                 input_sync(gspca_dev->input_dev);
 522                 ret = 0;
 523         }
 524 
 525         return ret;
 526 }
 527 #endif
 528 
 529 static int stv06xx_config(struct gspca_dev *gspca_dev,
 530                           const struct usb_device_id *id);
 531 
 532 /* sub-driver description */
 533 static const struct sd_desc sd_desc = {
 534         .name = MODULE_NAME,
 535         .config = stv06xx_config,
 536         .init = stv06xx_init,
 537         .init_controls = stv06xx_init_controls,
 538         .start = stv06xx_start,
 539         .stopN = stv06xx_stopN,
 540         .pkt_scan = stv06xx_pkt_scan,
 541         .isoc_init = stv06xx_isoc_init,
 542         .isoc_nego = stv06xx_isoc_nego,
 543 #if IS_ENABLED(CONFIG_INPUT)
 544         .int_pkt_scan = sd_int_pkt_scan,
 545 #endif
 546 };
 547 
 548 /* This function is called at probe time */
 549 static int stv06xx_config(struct gspca_dev *gspca_dev,
 550                           const struct usb_device_id *id)
 551 {
 552         struct sd *sd = (struct sd *) gspca_dev;
 553 
 554         gspca_dbg(gspca_dev, D_PROBE, "Configuring camera\n");
 555 
 556         sd->bridge = id->driver_info;
 557         gspca_dev->sd_desc = &sd_desc;
 558 
 559         if (dump_bridge)
 560                 stv06xx_dump_bridge(sd);
 561 
 562         sd->sensor = &stv06xx_sensor_st6422;
 563         if (!sd->sensor->probe(sd))
 564                 return 0;
 565 
 566         sd->sensor = &stv06xx_sensor_vv6410;
 567         if (!sd->sensor->probe(sd))
 568                 return 0;
 569 
 570         sd->sensor = &stv06xx_sensor_hdcs1x00;
 571         if (!sd->sensor->probe(sd))
 572                 return 0;
 573 
 574         sd->sensor = &stv06xx_sensor_hdcs1020;
 575         if (!sd->sensor->probe(sd))
 576                 return 0;
 577 
 578         sd->sensor = &stv06xx_sensor_pb0100;
 579         if (!sd->sensor->probe(sd))
 580                 return 0;
 581 
 582         sd->sensor = NULL;
 583         return -ENODEV;
 584 }
 585 
 586 
 587 
 588 /* -- module initialisation -- */
 589 static const struct usb_device_id device_table[] = {
 590         {USB_DEVICE(0x046d, 0x0840), .driver_info = BRIDGE_STV600 },    /* QuickCam Express */
 591         {USB_DEVICE(0x046d, 0x0850), .driver_info = BRIDGE_STV610 },    /* LEGO cam / QuickCam Web */
 592         {USB_DEVICE(0x046d, 0x0870), .driver_info = BRIDGE_STV602 },    /* Dexxa WebCam USB */
 593         {USB_DEVICE(0x046D, 0x08F0), .driver_info = BRIDGE_ST6422 },    /* QuickCam Messenger */
 594         {USB_DEVICE(0x046D, 0x08F5), .driver_info = BRIDGE_ST6422 },    /* QuickCam Communicate */
 595         {USB_DEVICE(0x046D, 0x08F6), .driver_info = BRIDGE_ST6422 },    /* QuickCam Messenger (new) */
 596         {}
 597 };
 598 MODULE_DEVICE_TABLE(usb, device_table);
 599 
 600 /* -- device connect -- */
 601 static int sd_probe(struct usb_interface *intf,
 602                         const struct usb_device_id *id)
 603 {
 604         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 605                                THIS_MODULE);
 606 }
 607 
 608 static void sd_disconnect(struct usb_interface *intf)
 609 {
 610         struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
 611         struct sd *sd = (struct sd *) gspca_dev;
 612         void *priv = sd->sensor_priv;
 613         gspca_dbg(gspca_dev, D_PROBE, "Disconnecting the stv06xx device\n");
 614 
 615         sd->sensor = NULL;
 616         gspca_disconnect(intf);
 617         kfree(priv);
 618 }
 619 
 620 static struct usb_driver sd_driver = {
 621         .name = MODULE_NAME,
 622         .id_table = device_table,
 623         .probe = sd_probe,
 624         .disconnect = sd_disconnect,
 625 #ifdef CONFIG_PM
 626         .suspend = gspca_suspend,
 627         .resume = gspca_resume,
 628         .reset_resume = gspca_resume,
 629 #endif
 630 };
 631 
 632 module_usb_driver(sd_driver);
 633 
 634 module_param(dump_bridge, bool, S_IRUGO | S_IWUSR);
 635 MODULE_PARM_DESC(dump_bridge, "Dumps all usb bridge registers at startup");
 636 
 637 module_param(dump_sensor, bool, S_IRUGO | S_IWUSR);
 638 MODULE_PARM_DESC(dump_sensor, "Dumps all sensor registers at startup");