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

   1 /*
   2  * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
   3  *                    Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
   4  * Copyright (c) 2002, 2003 Tuukka Toivonen
   5  * Copyright (c) 2008 Erik Andrén
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * P/N 861037:      Sensor HDCS1000        ASIC STV0600
  18  * P/N 861050-0010: Sensor HDCS1000        ASIC STV0600
  19  * P/N 861050-0020: Sensor Photobit PB100  ASIC STV0600-1 - QuickCam Express
  20  * P/N 861055:      Sensor ST VV6410       ASIC STV0610   - LEGO cam
  21  * P/N 861075-0040: Sensor HDCS1000        ASIC
  22  * P/N 961179-0700: Sensor ST VV6410       ASIC STV0602   - Dexxa WebCam USB
  23  * P/N 861040-0000: Sensor ST VV6410       ASIC STV0610   - QuickCam Web
  24  */
  25
  26 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  27
  28 #include <linux/input.h>
  29 #include "stv06xx_sensor.h"
  30
  31 MODULE_AUTHOR("Erik Andrén");
  32 MODULE_DESCRIPTION("STV06XX USB Camera Driver");
  33 MODULE_LICENSE("GPL");
  34
  35 static bool dump_bridge;
  36 static bool dump_sensor;
  37
  38 int stv06xx_write_bridge(struct sd *sd, u16 address, u16 i2c_data)
  39 {
  40         int err;
  41         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
  42         struct usb_device *udev = sd->gspca_dev.dev;
  43         __u8 *buf = sd->gspca_dev.usb_buf;
  44
  45         u8 len = (i2c_data > 0xff) ? 2 : 1;
  46
  47         buf[0] = i2c_data & 0xff;
  48         buf[1] = (i2c_data >> 8) & 0xff;
  49
  50         err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  51                               0x04, 0x40, address, 0, buf, len,
  52                               STV06XX_URB_MSG_TIMEOUT);
  53
  54         gspca_dbg(gspca_dev, D_CONF, "Written 0x%x to address 0x%x, status: %d\n",
  55                   i2c_data, address, err);
  56
  57         return (err < 0) ? err : 0;
  58 }
  59
  60 int stv06xx_read_bridge(struct sd *sd, u16 address, u8 *i2c_data)
  61 {
  62         int err;
  63         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
  64         struct usb_device *udev = sd->gspca_dev.dev;
  65         __u8 *buf = sd->gspca_dev.usb_buf;
  66
  67         err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
  68                               0x04, 0xc0, address, 0, buf, 1,
  69                               STV06XX_URB_MSG_TIMEOUT);
  70
  71         *i2c_data = buf[0];
  72
  73         gspca_dbg(gspca_dev, D_CONF, "Reading 0x%x from address 0x%x, status %d\n",
  74                   *i2c_data, address, err);
  75
  76         return (err < 0) ? err : 0;
  77 }
  78
  79 /* Wraps the normal write sensor bytes / words functions for writing a
  80    single value */
  81 int stv06xx_write_sensor(struct sd *sd, u8 address, u16 value)
  82 {
  83         if (sd->sensor->i2c_len == 2) {
  84                 u16 data[2] = { address, value };
  85                 return stv06xx_write_sensor_words(sd, data, 1);
  86         } else {
  87                 u8 data[2] = { address, value };
  88                 return stv06xx_write_sensor_bytes(sd, data, 1);
  89         }
  90 }
  91
  92 static int stv06xx_write_sensor_finish(struct sd *sd)
  93 {
  94         int err = 0;
  95
  96         if (sd->bridge == BRIDGE_STV610) {
  97                 struct usb_device *udev = sd->gspca_dev.dev;
  98                 __u8 *buf = sd->gspca_dev.usb_buf;
  99
 100                 buf[0] = 0;
 101                 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 102                                       0x04, 0x40, 0x1704, 0, buf, 1,
 103                                       STV06XX_URB_MSG_TIMEOUT);
 104         }
 105
 106         return (err < 0) ? err : 0;
 107 }
 108
 109 int stv06xx_write_sensor_bytes(struct sd *sd, const u8 *data, u8 len)
 110 {
 111         int err, i, j;
 112         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 113         struct usb_device *udev = sd->gspca_dev.dev;
 114         __u8 *buf = sd->gspca_dev.usb_buf;
 115
 116         gspca_dbg(gspca_dev, D_CONF, "I2C: Command buffer contains %d entries\n",
 117                   len);
 118         for (i = 0; i < len;) {
 119                 /* Build the command buffer */
 120                 memset(buf, 0, I2C_BUFFER_LENGTH);
 121                 for (j = 0; j < I2C_MAX_BYTES && i < len; j++, i++) {
 122                         buf[j] = data[2*i];
 123                         buf[0x10 + j] = data[2*i+1];
 124                         gspca_dbg(gspca_dev, D_CONF, "I2C: Writing 0x%02x to reg 0x%02x\n",
 125                                   data[2*i+1], data[2*i]);
 126                 }
 127                 buf[0x20] = sd->sensor->i2c_addr;
 128                 buf[0x21] = j - 1; /* Number of commands to send - 1 */
 129                 buf[0x22] = I2C_WRITE_CMD;
 130                 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 131                                       0x04, 0x40, 0x0400, 0, buf,
 132                                       I2C_BUFFER_LENGTH,
 133                                       STV06XX_URB_MSG_TIMEOUT);
 134                 if (err < 0)
 135                         return err;
 136         }
 137         return stv06xx_write_sensor_finish(sd);
 138 }
 139
 140 int stv06xx_write_sensor_words(struct sd *sd, const u16 *data, u8 len)
 141 {
 142         int err, i, j;
 143         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 144         struct usb_device *udev = sd->gspca_dev.dev;
 145         __u8 *buf = sd->gspca_dev.usb_buf;
 146
 147         gspca_dbg(gspca_dev, D_CONF, "I2C: Command buffer contains %d entries\n",
 148                   len);
 149
 150         for (i = 0; i < len;) {
 151                 /* Build the command buffer */
 152                 memset(buf, 0, I2C_BUFFER_LENGTH);
 153                 for (j = 0; j < I2C_MAX_WORDS && i < len; j++, i++) {
 154                         buf[j] = data[2*i];
 155                         buf[0x10 + j * 2] = data[2*i+1];
 156                         buf[0x10 + j * 2 + 1] = data[2*i+1] >> 8;
 157                         gspca_dbg(gspca_dev, D_CONF, "I2C: Writing 0x%04x to reg 0x%02x\n",
 158                                   data[2*i+1], data[2*i]);
 159                 }
 160                 buf[0x20] = sd->sensor->i2c_addr;
 161                 buf[0x21] = j - 1; /* Number of commands to send - 1 */
 162                 buf[0x22] = I2C_WRITE_CMD;
 163                 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 164                                 0x04, 0x40, 0x0400, 0, buf,
 165                                 I2C_BUFFER_LENGTH,
 166                                 STV06XX_URB_MSG_TIMEOUT);
 167                 if (err < 0)
 168                         return err;
 169         }
 170         return stv06xx_write_sensor_finish(sd);
 171 }
 172
 173 int stv06xx_read_sensor(struct sd *sd, const u8 address, u16 *value)
 174 {
 175         int err;
 176         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 177         struct usb_device *udev = sd->gspca_dev.dev;
 178         __u8 *buf = sd->gspca_dev.usb_buf;
 179
 180         err = stv06xx_write_bridge(sd, STV_I2C_FLUSH, sd->sensor->i2c_flush);
 181         if (err < 0)
 182                 return err;
 183
 184         /* Clear mem */
 185         memset(buf, 0, I2C_BUFFER_LENGTH);
 186
 187         buf[0] = address;
 188         buf[0x20] = sd->sensor->i2c_addr;
 189         buf[0x21] = 0;
 190
 191         /* Read I2C register */
 192         buf[0x22] = I2C_READ_CMD;
 193
 194         err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 195                               0x04, 0x40, 0x1400, 0, buf, I2C_BUFFER_LENGTH,
 196                               STV06XX_URB_MSG_TIMEOUT);
 197         if (err < 0) {
 198                 pr_err("I2C: Read error writing address: %d\n", err);
 199                 return err;
 200         }
 201
 202         err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 203                               0x04, 0xc0, 0x1410, 0, buf, sd->sensor->i2c_len,
 204                               STV06XX_URB_MSG_TIMEOUT);
 205         if (sd->sensor->i2c_len == 2)
 206                 *value = buf[0] | (buf[1] << 8);
 207         else
 208                 *value = buf[0];
 209
 210         gspca_dbg(gspca_dev, D_CONF, "I2C: Read 0x%x from address 0x%x, status: %d\n",
 211                   *value, address, err);
 212
 213         return (err < 0) ? err : 0;
 214 }
 215
 216 /* Dumps all bridge registers */
 217 static void stv06xx_dump_bridge(struct sd *sd)
 218 {
 219         int i;
 220         u8 data, buf;
 221
 222         pr_info("Dumping all stv06xx bridge registers\n");
 223         for (i = 0x1400; i < 0x160f; i++) {
 224                 stv06xx_read_bridge(sd, i, &data);
 225
 226                 pr_info("Read 0x%x from address 0x%x\n", data, i);
 227         }
 228
 229         pr_info("Testing stv06xx bridge registers for writability\n");
 230         for (i = 0x1400; i < 0x160f; i++) {
 231                 stv06xx_read_bridge(sd, i, &data);
 232                 buf = data;
 233
 234                 stv06xx_write_bridge(sd, i, 0xff);
 235                 stv06xx_read_bridge(sd, i, &data);
 236                 if (data == 0xff)
 237                         pr_info("Register 0x%x is read/write\n", i);
 238                 else if (data != buf)
 239                         pr_info("Register 0x%x is read/write, but only partially\n",
 240                                 i);
 241                 else
 242                         pr_info("Register 0x%x is read-only\n", i);
 243
 244                 stv06xx_write_bridge(sd, i, buf);
 245         }
 246 }
 247
 248 /* this function is called at probe and resume time */
 249 static int stv06xx_init(struct gspca_dev *gspca_dev)
 250 {
 251         struct sd *sd = (struct sd *) gspca_dev;
 252         int err;
 253
 254         gspca_dbg(gspca_dev, D_PROBE, "Initializing camera\n");
 255
 256         /* Let the usb init settle for a bit
 257            before performing the initialization */
 258         msleep(250);
 259
 260         err = sd->sensor->init(sd);
 261
 262         if (dump_sensor && sd->sensor->dump)
 263                 sd->sensor->dump(sd);
 264
 265         return (err < 0) ? err : 0;
 266 }
 267
 268 /* this function is called at probe time */
 269 static int stv06xx_init_controls(struct gspca_dev *gspca_dev)
 270 {
 271         struct sd *sd = (struct sd *) gspca_dev;
 272
 273         gspca_dbg(gspca_dev, D_PROBE, "Initializing controls\n");
 274
 275         gspca_dev->vdev.ctrl_handler = &gspca_dev->ctrl_handler;
 276         return sd->sensor->init_controls(sd);
 277 }
 278
 279 /* Start the camera */
 280 static int stv06xx_start(struct gspca_dev *gspca_dev)
 281 {
 282         struct sd *sd = (struct sd *) gspca_dev;
 283         struct usb_host_interface *alt;
 284         struct usb_interface *intf;
 285         int err, packet_size;
 286
 287         intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
 288         alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
 289         if (!alt) {
 290                 gspca_err(gspca_dev, "Couldn't get altsetting\n");
 291                 return -EIO;
 292         }
 293
 294         if (alt->desc.bNumEndpoints < 1)
 295                 return -ENODEV;
 296
 297         packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
 298         err = stv06xx_write_bridge(sd, STV_ISO_SIZE_L, packet_size);
 299         if (err < 0)
 300                 return err;
 301
 302         /* Prepare the sensor for start */
 303         err = sd->sensor->start(sd);
 304         if (err < 0)
 305                 goto out;
 306
 307         /* Start isochronous streaming */
 308         err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 1);
 309
 310 out:
 311         if (err < 0)
 312                 gspca_dbg(gspca_dev, D_STREAM, "Starting stream failed\n");
 313         else
 314                 gspca_dbg(gspca_dev, D_STREAM, "Started streaming\n");
 315
 316         return (err < 0) ? err : 0;
 317 }
 318
 319 static int stv06xx_isoc_init(struct gspca_dev *gspca_dev)
 320 {
 321         struct usb_interface_cache *intfc;
 322         struct usb_host_interface *alt;
 323         struct sd *sd = (struct sd *) gspca_dev;
 324
 325         intfc = gspca_dev->dev->actconfig->intf_cache[0];
 326
 327         if (intfc->num_altsetting < 2)
 328                 return -ENODEV;
 329
 330         alt = &intfc->altsetting[1];
 331
 332         if (alt->desc.bNumEndpoints < 1)
 333                 return -ENODEV;
 334
 335         /* Start isoc bandwidth "negotiation" at max isoc bandwidth */
 336         alt->endpoint[0].desc.wMaxPacketSize =
 337                 cpu_to_le16(sd->sensor->max_packet_size[gspca_dev->curr_mode]);
 338
 339         return 0;
 340 }
 341
 342 static int stv06xx_isoc_nego(struct gspca_dev *gspca_dev)
 343 {
 344         int ret, packet_size, min_packet_size;
 345         struct usb_host_interface *alt;
 346         struct sd *sd = (struct sd *) gspca_dev;
 347
 348         /*
 349          * Existence of altsetting and endpoint was verified in
 350          * stv06xx_isoc_init()
 351          */
 352         alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
 353         packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
 354         min_packet_size = sd->sensor->min_packet_size[gspca_dev->curr_mode];
 355         if (packet_size <= min_packet_size)
 356                 return -EIO;
 357
 358         packet_size -= 100;
 359         if (packet_size < min_packet_size)
 360                 packet_size = min_packet_size;
 361         alt->endpoint[0].desc.wMaxPacketSize = cpu_to_le16(packet_size);
 362
 363         ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
 364         if (ret < 0)
 365                 gspca_err(gspca_dev, "set alt 1 err %d\n", ret);
 366
 367         return ret;
 368 }
 369
 370 static void stv06xx_stopN(struct gspca_dev *gspca_dev)
 371 {
 372         int err;
 373         struct sd *sd = (struct sd *) gspca_dev;
 374
 375         /* stop ISO-streaming */
 376         err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 0);
 377         if (err < 0)
 378                 goto out;
 379
 380         err = sd->sensor->stop(sd);
 381
 382 out:
 383         if (err < 0)
 384                 gspca_dbg(gspca_dev, D_STREAM, "Failed to stop stream\n");
 385         else
 386                 gspca_dbg(gspca_dev, D_STREAM, "Stopped streaming\n");
 387 }
 388
 389 /*
 390  * Analyse an USB packet of the data stream and store it appropriately.
 391  * Each packet contains an integral number of chunks. Each chunk has
 392  * 2-bytes identification, followed by 2-bytes that describe the chunk
 393  * length. Known/guessed chunk identifications are:
 394  * 8001/8005/C001/C005 - Begin new frame
 395  * 8002/8006/C002/C006 - End frame
 396  * 0200/4200           - Contains actual image data, bayer or compressed
 397  * 0005                - 11 bytes of unknown data
 398  * 0100                - 2 bytes of unknown data
 399  * The 0005 and 0100 chunks seem to appear only in compressed stream.
 400  */
 401 static void stv06xx_pkt_scan(struct gspca_dev *gspca_dev,
 402                         u8 *data,                       /* isoc packet */
 403                         int len)                        /* iso packet length */
 404 {
 405         struct sd *sd = (struct sd *) gspca_dev;
 406
 407         gspca_dbg(gspca_dev, D_PACK, "Packet of length %d arrived\n", len);
 408
 409         /* A packet may contain several frames
 410            loop until the whole packet is reached */
 411         while (len) {
 412                 int id, chunk_len;
 413
 414                 if (len < 4) {
 415                         gspca_dbg(gspca_dev, D_PACK, "Packet is smaller than 4 bytes\n");
 416                         return;
 417                 }
 418
 419                 /* Capture the id */
 420                 id = (data[0] << 8) | data[1];
 421
 422                 /* Capture the chunk length */
 423                 chunk_len = (data[2] << 8) | data[3];
 424                 gspca_dbg(gspca_dev, D_PACK, "Chunk id: %x, length: %d\n",
 425                           id, chunk_len);
 426
 427                 data += 4;
 428                 len -= 4;
 429
 430                 if (len < chunk_len) {
 431                         gspca_err(gspca_dev, "URB packet length is smaller than the specified chunk length\n");
 432                         gspca_dev->last_packet_type = DISCARD_PACKET;
 433                         return;
 434                 }
 435
 436                 /* First byte seem to be 02=data 2nd byte is unknown??? */
 437                 if (sd->bridge == BRIDGE_ST6422 && (id & 0xff00) == 0x0200)
 438                         goto frame_data;
 439
 440                 switch (id) {
 441                 case 0x0200:
 442                 case 0x4200:
 443 frame_data:
 444                         gspca_dbg(gspca_dev, D_PACK, "Frame data packet detected\n");
 445
 446                         if (sd->to_skip) {
 447                                 int skip = (sd->to_skip < chunk_len) ?
 448                                             sd->to_skip : chunk_len;
 449                                 data += skip;
 450                                 len -= skip;
 451                                 chunk_len -= skip;
 452                                 sd->to_skip -= skip;
 453                         }
 454
 455                         gspca_frame_add(gspca_dev, INTER_PACKET,
 456                                         data, chunk_len);
 457                         break;
 458
 459                 case 0x8001:
 460                 case 0x8005:
 461                 case 0xc001:
 462                 case 0xc005:
 463                         gspca_dbg(gspca_dev, D_PACK, "Starting new frame\n");
 464
 465                         /* Create a new frame, chunk length should be zero */
 466                         gspca_frame_add(gspca_dev, FIRST_PACKET,
 467                                         NULL, 0);
 468
 469                         if (sd->bridge == BRIDGE_ST6422)
 470                                 sd->to_skip = gspca_dev->pixfmt.width * 4;
 471
 472                         if (chunk_len)
 473                                 gspca_err(gspca_dev, "Chunk length is non-zero on a SOF\n");
 474                         break;
 475
 476                 case 0x8002:
 477                 case 0x8006:
 478                 case 0xc002:
 479                         gspca_dbg(gspca_dev, D_PACK, "End of frame detected\n");
 480
 481                         /* Complete the last frame (if any) */
 482                         gspca_frame_add(gspca_dev, LAST_PACKET,
 483                                         NULL, 0);
 484
 485                         if (chunk_len)
 486                                 gspca_err(gspca_dev, "Chunk length is non-zero on a EOF\n");
 487                         break;
 488
 489                 case 0x0005:
 490                         gspca_dbg(gspca_dev, D_PACK, "Chunk 0x005 detected\n");
 491                         /* Unknown chunk with 11 bytes of data,
 492                            occurs just before end of each frame
 493                            in compressed mode */
 494                         break;
 495
 496                 case 0x0100:
 497                         gspca_dbg(gspca_dev, D_PACK, "Chunk 0x0100 detected\n");
 498                         /* Unknown chunk with 2 bytes of data,
 499                            occurs 2-3 times per USB interrupt */
 500                         break;
 501                 case 0x42ff:
 502                         gspca_dbg(gspca_dev, D_PACK, "Chunk 0x42ff detected\n");
 503                         /* Special chunk seen sometimes on the ST6422 */
 504                         break;
 505                 default:
 506                         gspca_dbg(gspca_dev, D_PACK, "Unknown chunk 0x%04x detected\n",
 507                                   id);
 508                         /* Unknown chunk */
 509                 }
 510                 data    += chunk_len;
 511                 len     -= chunk_len;
 512         }
 513 }
 514
 515 #if IS_ENABLED(CONFIG_INPUT)
 516 static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
 517                         u8 *data,               /* interrupt packet data */
 518                         int len)                /* interrupt packet length */
 519 {
 520         int ret = -EINVAL;
 521
 522         if (len == 1 && (data[0] == 0x80 || data[0] == 0x10)) {
 523                 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
 524                 input_sync(gspca_dev->input_dev);
 525                 ret = 0;
 526         }
 527
 528         if (len == 1 && (data[0] == 0x88 || data[0] == 0x11)) {
 529                 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
 530                 input_sync(gspca_dev->input_dev);
 531                 ret = 0;
 532         }
 533
 534         return ret;
 535 }
 536 #endif
 537
 538 static int stv06xx_config(struct gspca_dev *gspca_dev,
 539                           const struct usb_device_id *id);
 540
 541 static void stv06xx_probe_error(struct gspca_dev *gspca_dev)
 542 {
 543         struct sd *sd = (struct sd *)gspca_dev;
 544
 545         kfree(sd->sensor_priv);
 546         sd->sensor_priv = NULL;
 547 }
 548
 549 /* sub-driver description */
 550 static const struct sd_desc sd_desc = {
 551         .name = MODULE_NAME,
 552         .config = stv06xx_config,
 553         .init = stv06xx_init,
 554         .init_controls = stv06xx_init_controls,
 555         .probe_error = stv06xx_probe_error,
 556         .start = stv06xx_start,
 557         .stopN = stv06xx_stopN,
 558         .pkt_scan = stv06xx_pkt_scan,
 559         .isoc_init = stv06xx_isoc_init,
 560         .isoc_nego = stv06xx_isoc_nego,
 561 #if IS_ENABLED(CONFIG_INPUT)
 562         .int_pkt_scan = sd_int_pkt_scan,
 563 #endif
 564 };
 565
 566 /* This function is called at probe time */
 567 static int stv06xx_config(struct gspca_dev *gspca_dev,
 568                           const struct usb_device_id *id)
 569 {
 570         struct sd *sd = (struct sd *) gspca_dev;
 571
 572         gspca_dbg(gspca_dev, D_PROBE, "Configuring camera\n");
 573
 574         sd->bridge = id->driver_info;
 575         gspca_dev->sd_desc = &sd_desc;
 576
 577         if (dump_bridge)
 578                 stv06xx_dump_bridge(sd);
 579
 580         sd->sensor = &stv06xx_sensor_st6422;
 581         if (!sd->sensor->probe(sd))
 582                 return 0;
 583
 584         sd->sensor = &stv06xx_sensor_vv6410;
 585         if (!sd->sensor->probe(sd))
 586                 return 0;
 587
 588         sd->sensor = &stv06xx_sensor_hdcs1x00;
 589         if (!sd->sensor->probe(sd))
 590                 return 0;
 591
 592         sd->sensor = &stv06xx_sensor_hdcs1020;
 593         if (!sd->sensor->probe(sd))
 594                 return 0;
 595
 596         sd->sensor = &stv06xx_sensor_pb0100;
 597         if (!sd->sensor->probe(sd))
 598                 return 0;
 599
 600         sd->sensor = NULL;
 601         return -ENODEV;
 602 }
 603
 604
 605
 606 /* -- module initialisation -- */
 607 static const struct usb_device_id device_table[] = {
 608         {USB_DEVICE(0x046d, 0x0840), .driver_info = BRIDGE_STV600 },    /* QuickCam Express */
 609         {USB_DEVICE(0x046d, 0x0850), .driver_info = BRIDGE_STV610 },    /* LEGO cam / QuickCam Web */
 610         {USB_DEVICE(0x046d, 0x0870), .driver_info = BRIDGE_STV602 },    /* Dexxa WebCam USB */
 611         {USB_DEVICE(0x046D, 0x08F0), .driver_info = BRIDGE_ST6422 },    /* QuickCam Messenger */
 612         {USB_DEVICE(0x046D, 0x08F5), .driver_info = BRIDGE_ST6422 },    /* QuickCam Communicate */
 613         {USB_DEVICE(0x046D, 0x08F6), .driver_info = BRIDGE_ST6422 },    /* QuickCam Messenger (new) */
 614         {}
 615 };
 616 MODULE_DEVICE_TABLE(usb, device_table);
 617
 618 /* -- device connect -- */
 619 static int sd_probe(struct usb_interface *intf,
 620                         const struct usb_device_id *id)
 621 {
 622         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 623                                THIS_MODULE);
 624 }
 625
 626 static void sd_disconnect(struct usb_interface *intf)
 627 {
 628         struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
 629         struct sd *sd = (struct sd *) gspca_dev;
 630         void *priv = sd->sensor_priv;
 631         gspca_dbg(gspca_dev, D_PROBE, "Disconnecting the stv06xx device\n");
 632
 633         sd->sensor = NULL;
 634         gspca_disconnect(intf);
 635         kfree(priv);
 636 }
 637
 638 static struct usb_driver sd_driver = {
 639         .name = MODULE_NAME,
 640         .id_table = device_table,
 641         .probe = sd_probe,
 642         .disconnect = sd_disconnect,
 643 #ifdef CONFIG_PM
 644         .suspend = gspca_suspend,
 645         .resume = gspca_resume,
 646         .reset_resume = gspca_resume,
 647 #endif
 648 };
 649
 650 module_usb_driver(sd_driver);
 651
 652 module_param(dump_bridge, bool, S_IRUGO | S_IWUSR);
 653 MODULE_PARM_DESC(dump_bridge, "Dumps all usb bridge registers at startup");
 654
 655 module_param(dump_sensor, bool, S_IRUGO | S_IWUSR);
 656 MODULE_PARM_DESC(dump_sensor, "Dumps all sensor registers at startup");