drivers/media/video/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  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  * P/N 861037:      Sensor HDCS1000        ASIC STV0600
  22  * P/N 861050-0010: Sensor HDCS1000        ASIC STV0600
  23  * P/N 861050-0020: Sensor Photobit PB100  ASIC STV0600-1 - QuickCam Express
  24  * P/N 861055:      Sensor ST VV6410       ASIC STV0610   - LEGO cam
  25  * P/N 861075-0040: Sensor HDCS1000        ASIC
  26  * P/N 961179-0700: Sensor ST VV6410       ASIC STV0602   - Dexxa WebCam USB
  27  * P/N 861040-0000: Sensor ST VV6410       ASIC STV0610   - QuickCam Web
  28  */
  29
  30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  31
  32 #include <linux/input.h>
  33 #include "stv06xx_sensor.h"
  34
  35 MODULE_AUTHOR("Erik Andrén");
  36 MODULE_DESCRIPTION("STV06XX USB Camera Driver");
  37 MODULE_LICENSE("GPL");
  38
  39 static bool dump_bridge;
  40 static bool dump_sensor;
  41
  42 int stv06xx_write_bridge(struct sd *sd, u16 address, u16 i2c_data)
  43 {
  44         int err;
  45         struct usb_device *udev = sd->gspca_dev.dev;
  46         __u8 *buf = sd->gspca_dev.usb_buf;
  47         u8 len = (i2c_data > 0xff) ? 2 : 1;
  48
  49         buf[0] = i2c_data & 0xff;
  50         buf[1] = (i2c_data >> 8) & 0xff;
  51
  52         err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  53                               0x04, 0x40, address, 0, buf, len,
  54                               STV06XX_URB_MSG_TIMEOUT);
  55
  56         PDEBUG(D_CONF, "Written 0x%x to address 0x%x, status: %d",
  57                i2c_data, address, err);
  58
  59         return (err < 0) ? err : 0;
  60 }
  61
  62 int stv06xx_read_bridge(struct sd *sd, u16 address, u8 *i2c_data)
  63 {
  64         int err;
  65         struct usb_device *udev = sd->gspca_dev.dev;
  66         __u8 *buf = sd->gspca_dev.usb_buf;
  67
  68         err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
  69                               0x04, 0xc0, address, 0, buf, 1,
  70                               STV06XX_URB_MSG_TIMEOUT);
  71
  72         *i2c_data = buf[0];
  73
  74         PDEBUG(D_CONF, "Reading 0x%x from address 0x%x, status %d",
  75                *i2c_data, address, err);
  76
  77         return (err < 0) ? err : 0;
  78 }
  79
  80 /* Wraps the normal write sensor bytes / words functions for writing a
  81    single value */
  82 int stv06xx_write_sensor(struct sd *sd, u8 address, u16 value)
  83 {
  84         if (sd->sensor->i2c_len == 2) {
  85                 u16 data[2] = { address, value };
  86                 return stv06xx_write_sensor_words(sd, data, 1);
  87         } else {
  88                 u8 data[2] = { address, value };
  89                 return stv06xx_write_sensor_bytes(sd, data, 1);
  90         }
  91 }
  92
  93 static int stv06xx_write_sensor_finish(struct sd *sd)
  94 {
  95         int err = 0;
  96
  97         if (sd->bridge == BRIDGE_STV610) {
  98                 struct usb_device *udev = sd->gspca_dev.dev;
  99                 __u8 *buf = sd->gspca_dev.usb_buf;
 100
 101                 buf[0] = 0;
 102                 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 103                                       0x04, 0x40, 0x1704, 0, buf, 1,
 104                                       STV06XX_URB_MSG_TIMEOUT);
 105         }
 106
 107         return (err < 0) ? err : 0;
 108 }
 109
 110 int stv06xx_write_sensor_bytes(struct sd *sd, const u8 *data, u8 len)
 111 {
 112         int err, i, j;
 113         struct usb_device *udev = sd->gspca_dev.dev;
 114         __u8 *buf = sd->gspca_dev.usb_buf;
 115
 116         PDEBUG(D_CONF, "I2C: Command buffer contains %d entries", len);
 117         for (i = 0; i < len;) {
 118                 /* Build the command buffer */
 119                 memset(buf, 0, I2C_BUFFER_LENGTH);
 120                 for (j = 0; j < I2C_MAX_BYTES && i < len; j++, i++) {
 121                         buf[j] = data[2*i];
 122                         buf[0x10 + j] = data[2*i+1];
 123                         PDEBUG(D_CONF, "I2C: Writing 0x%02x to reg 0x%02x",
 124                         data[2*i+1], data[2*i]);
 125                 }
 126                 buf[0x20] = sd->sensor->i2c_addr;
 127                 buf[0x21] = j - 1; /* Number of commands to send - 1 */
 128                 buf[0x22] = I2C_WRITE_CMD;
 129                 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 130                                       0x04, 0x40, 0x0400, 0, buf,
 131                                       I2C_BUFFER_LENGTH,
 132                                       STV06XX_URB_MSG_TIMEOUT);
 133                 if (err < 0)
 134                         return err;
 135         }
 136         return stv06xx_write_sensor_finish(sd);
 137 }
 138
 139 int stv06xx_write_sensor_words(struct sd *sd, const u16 *data, u8 len)
 140 {
 141         int err, i, j;
 142         struct usb_device *udev = sd->gspca_dev.dev;
 143         __u8 *buf = sd->gspca_dev.usb_buf;
 144
 145         PDEBUG(D_CONF, "I2C: Command buffer contains %d entries", len);
 146
 147         for (i = 0; i < len;) {
 148                 /* Build the command buffer */
 149                 memset(buf, 0, I2C_BUFFER_LENGTH);
 150                 for (j = 0; j < I2C_MAX_WORDS && i < len; j++, i++) {
 151                         buf[j] = data[2*i];
 152                         buf[0x10 + j * 2] = data[2*i+1];
 153                         buf[0x10 + j * 2 + 1] = data[2*i+1] >> 8;
 154                         PDEBUG(D_CONF, "I2C: Writing 0x%04x to reg 0x%02x",
 155                                 data[2*i+1], data[2*i]);
 156                 }
 157                 buf[0x20] = sd->sensor->i2c_addr;
 158                 buf[0x21] = j - 1; /* Number of commands to send - 1 */
 159                 buf[0x22] = I2C_WRITE_CMD;
 160                 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 161                                 0x04, 0x40, 0x0400, 0, buf,
 162                                 I2C_BUFFER_LENGTH,
 163                                 STV06XX_URB_MSG_TIMEOUT);
 164                 if (err < 0)
 165                         return err;
 166         }
 167         return stv06xx_write_sensor_finish(sd);
 168 }
 169
 170 int stv06xx_read_sensor(struct sd *sd, const u8 address, u16 *value)
 171 {
 172         int err;
 173         struct usb_device *udev = sd->gspca_dev.dev;
 174         __u8 *buf = sd->gspca_dev.usb_buf;
 175
 176         err = stv06xx_write_bridge(sd, STV_I2C_FLUSH, sd->sensor->i2c_flush);
 177         if (err < 0)
 178                 return err;
 179
 180         /* Clear mem */
 181         memset(buf, 0, I2C_BUFFER_LENGTH);
 182
 183         buf[0] = address;
 184         buf[0x20] = sd->sensor->i2c_addr;
 185         buf[0x21] = 0;
 186
 187         /* Read I2C register */
 188         buf[0x22] = I2C_READ_CMD;
 189
 190         err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 191                               0x04, 0x40, 0x1400, 0, buf, I2C_BUFFER_LENGTH,
 192                               STV06XX_URB_MSG_TIMEOUT);
 193         if (err < 0) {
 194                 pr_err("I2C: Read error writing address: %d\n", err);
 195                 return err;
 196         }
 197
 198         err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 199                               0x04, 0xc0, 0x1410, 0, buf, sd->sensor->i2c_len,
 200                               STV06XX_URB_MSG_TIMEOUT);
 201         if (sd->sensor->i2c_len == 2)
 202                 *value = buf[0] | (buf[1] << 8);
 203         else
 204                 *value = buf[0];
 205
 206         PDEBUG(D_CONF, "I2C: Read 0x%x from address 0x%x, status: %d",
 207                *value, address, err);
 208
 209         return (err < 0) ? err : 0;
 210 }
 211
 212 /* Dumps all bridge registers */
 213 static void stv06xx_dump_bridge(struct sd *sd)
 214 {
 215         int i;
 216         u8 data, buf;
 217
 218         pr_info("Dumping all stv06xx bridge registers\n");
 219         for (i = 0x1400; i < 0x160f; i++) {
 220                 stv06xx_read_bridge(sd, i, &data);
 221
 222                 pr_info("Read 0x%x from address 0x%x\n", data, i);
 223         }
 224
 225         pr_info("Testing stv06xx bridge registers for writability\n");
 226         for (i = 0x1400; i < 0x160f; i++) {
 227                 stv06xx_read_bridge(sd, i, &data);
 228                 buf = data;
 229
 230                 stv06xx_write_bridge(sd, i, 0xff);
 231                 stv06xx_read_bridge(sd, i, &data);
 232                 if (data == 0xff)
 233                         pr_info("Register 0x%x is read/write\n", i);
 234                 else if (data != buf)
 235                         pr_info("Register 0x%x is read/write, but only partially\n",
 236                                 i);
 237                 else
 238                         pr_info("Register 0x%x is read-only\n", i);
 239
 240                 stv06xx_write_bridge(sd, i, buf);
 241         }
 242 }
 243
 244 /* this function is called at probe and resume time */
 245 static int stv06xx_init(struct gspca_dev *gspca_dev)
 246 {
 247         struct sd *sd = (struct sd *) gspca_dev;
 248         int err;
 249
 250         PDEBUG(D_PROBE, "Initializing camera");
 251
 252         /* Let the usb init settle for a bit
 253            before performing the initialization */
 254         msleep(250);
 255
 256         err = sd->sensor->init(sd);
 257
 258         if (dump_sensor && sd->sensor->dump)
 259                 sd->sensor->dump(sd);
 260
 261         return (err < 0) ? err : 0;
 262 }
 263
 264 /* this function is called at probe time */
 265 static int stv06xx_init_controls(struct gspca_dev *gspca_dev)
 266 {
 267         struct sd *sd = (struct sd *) gspca_dev;
 268
 269         PDEBUG(D_PROBE, "Initializing controls");
 270
 271         gspca_dev->vdev.ctrl_handler = &gspca_dev->ctrl_handler;
 272         return sd->sensor->init_controls(sd);
 273 }
 274
 275 /* Start the camera */
 276 static int stv06xx_start(struct gspca_dev *gspca_dev)
 277 {
 278         struct sd *sd = (struct sd *) gspca_dev;
 279         struct usb_host_interface *alt;
 280         struct usb_interface *intf;
 281         int err, packet_size;
 282
 283         intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
 284         alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
 285         if (!alt) {
 286                 PDEBUG(D_ERR, "Couldn't get altsetting");
 287                 return -EIO;
 288         }
 289
 290         packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
 291         err = stv06xx_write_bridge(sd, STV_ISO_SIZE_L, packet_size);
 292         if (err < 0)
 293                 return err;
 294
 295         /* Prepare the sensor for start */
 296         err = sd->sensor->start(sd);
 297         if (err < 0)
 298                 goto out;
 299
 300         /* Start isochronous streaming */
 301         err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 1);
 302
 303 out:
 304         if (err < 0)
 305                 PDEBUG(D_STREAM, "Starting stream failed");
 306         else
 307                 PDEBUG(D_STREAM, "Started streaming");
 308
 309         return (err < 0) ? err : 0;
 310 }
 311
 312 static int stv06xx_isoc_init(struct gspca_dev *gspca_dev)
 313 {
 314         struct usb_host_interface *alt;
 315         struct sd *sd = (struct sd *) gspca_dev;
 316
 317         /* Start isoc bandwidth "negotiation" at max isoc bandwidth */
 318         alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
 319         alt->endpoint[0].desc.wMaxPacketSize =
 320                 cpu_to_le16(sd->sensor->max_packet_size[gspca_dev->curr_mode]);
 321
 322         return 0;
 323 }
 324
 325 static int stv06xx_isoc_nego(struct gspca_dev *gspca_dev)
 326 {
 327         int ret, packet_size, min_packet_size;
 328         struct usb_host_interface *alt;
 329         struct sd *sd = (struct sd *) gspca_dev;
 330
 331         alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
 332         packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
 333         min_packet_size = sd->sensor->min_packet_size[gspca_dev->curr_mode];
 334         if (packet_size <= min_packet_size)
 335                 return -EIO;
 336
 337         packet_size -= 100;
 338         if (packet_size < min_packet_size)
 339                 packet_size = min_packet_size;
 340         alt->endpoint[0].desc.wMaxPacketSize = cpu_to_le16(packet_size);
 341
 342         ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
 343         if (ret < 0)
 344                 PDEBUG(D_ERR|D_STREAM, "set alt 1 err %d", ret);
 345
 346         return ret;
 347 }
 348
 349 static void stv06xx_stopN(struct gspca_dev *gspca_dev)
 350 {
 351         int err;
 352         struct sd *sd = (struct sd *) gspca_dev;
 353
 354         /* stop ISO-streaming */
 355         err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 0);
 356         if (err < 0)
 357                 goto out;
 358
 359         err = sd->sensor->stop(sd);
 360
 361 out:
 362         if (err < 0)
 363                 PDEBUG(D_STREAM, "Failed to stop stream");
 364         else
 365                 PDEBUG(D_STREAM, "Stopped streaming");
 366 }
 367
 368 /*
 369  * Analyse an USB packet of the data stream and store it appropriately.
 370  * Each packet contains an integral number of chunks. Each chunk has
 371  * 2-bytes identification, followed by 2-bytes that describe the chunk
 372  * length. Known/guessed chunk identifications are:
 373  * 8001/8005/C001/C005 - Begin new frame
 374  * 8002/8006/C002/C006 - End frame
 375  * 0200/4200           - Contains actual image data, bayer or compressed
 376  * 0005                - 11 bytes of unknown data
 377  * 0100                - 2 bytes of unknown data
 378  * The 0005 and 0100 chunks seem to appear only in compressed stream.
 379  */
 380 static void stv06xx_pkt_scan(struct gspca_dev *gspca_dev,
 381                         u8 *data,                       /* isoc packet */
 382                         int len)                        /* iso packet length */
 383 {
 384         struct sd *sd = (struct sd *) gspca_dev;
 385
 386         PDEBUG(D_PACK, "Packet of length %d arrived", len);
 387
 388         /* A packet may contain several frames
 389            loop until the whole packet is reached */
 390         while (len) {
 391                 int id, chunk_len;
 392
 393                 if (len < 4) {
 394                         PDEBUG(D_PACK, "Packet is smaller than 4 bytes");
 395                         return;
 396                 }
 397
 398                 /* Capture the id */
 399                 id = (data[0] << 8) | data[1];
 400
 401                 /* Capture the chunk length */
 402                 chunk_len = (data[2] << 8) | data[3];
 403                 PDEBUG(D_PACK, "Chunk id: %x, length: %d", id, chunk_len);
 404
 405                 data += 4;
 406                 len -= 4;
 407
 408                 if (len < chunk_len) {
 409                         PDEBUG(D_ERR, "URB packet length is smaller"
 410                                 " than the specified chunk length");
 411                         gspca_dev->last_packet_type = DISCARD_PACKET;
 412                         return;
 413                 }
 414
 415                 /* First byte seem to be 02=data 2nd byte is unknown??? */
 416                 if (sd->bridge == BRIDGE_ST6422 && (id & 0xff00) == 0x0200)
 417                         goto frame_data;
 418
 419                 switch (id) {
 420                 case 0x0200:
 421                 case 0x4200:
 422 frame_data:
 423                         PDEBUG(D_PACK, "Frame data packet detected");
 424
 425                         if (sd->to_skip) {
 426                                 int skip = (sd->to_skip < chunk_len) ?
 427                                             sd->to_skip : chunk_len;
 428                                 data += skip;
 429                                 len -= skip;
 430                                 chunk_len -= skip;
 431                                 sd->to_skip -= skip;
 432                         }
 433
 434                         gspca_frame_add(gspca_dev, INTER_PACKET,
 435                                         data, chunk_len);
 436                         break;
 437
 438                 case 0x8001:
 439                 case 0x8005:
 440                 case 0xc001:
 441                 case 0xc005:
 442                         PDEBUG(D_PACK, "Starting new frame");
 443
 444                         /* Create a new frame, chunk length should be zero */
 445                         gspca_frame_add(gspca_dev, FIRST_PACKET,
 446                                         NULL, 0);
 447
 448                         if (sd->bridge == BRIDGE_ST6422)
 449                                 sd->to_skip = gspca_dev->width * 4;
 450
 451                         if (chunk_len)
 452                                 PDEBUG(D_ERR, "Chunk length is "
 453                                               "non-zero on a SOF");
 454                         break;
 455
 456                 case 0x8002:
 457                 case 0x8006:
 458                 case 0xc002:
 459                         PDEBUG(D_PACK, "End of frame detected");
 460
 461                         /* Complete the last frame (if any) */
 462                         gspca_frame_add(gspca_dev, LAST_PACKET,
 463                                         NULL, 0);
 464
 465                         if (chunk_len)
 466                                 PDEBUG(D_ERR, "Chunk length is "
 467                                               "non-zero on a EOF");
 468                         break;
 469
 470                 case 0x0005:
 471                         PDEBUG(D_PACK, "Chunk 0x005 detected");
 472                         /* Unknown chunk with 11 bytes of data,
 473                            occurs just before end of each frame
 474                            in compressed mode */
 475                         break;
 476
 477                 case 0x0100:
 478                         PDEBUG(D_PACK, "Chunk 0x0100 detected");
 479                         /* Unknown chunk with 2 bytes of data,
 480                            occurs 2-3 times per USB interrupt */
 481                         break;
 482                 case 0x42ff:
 483                         PDEBUG(D_PACK, "Chunk 0x42ff detected");
 484                         /* Special chunk seen sometimes on the ST6422 */
 485                         break;
 486                 default:
 487                         PDEBUG(D_PACK, "Unknown chunk 0x%04x detected", id);
 488                         /* Unknown chunk */
 489                 }
 490                 data    += chunk_len;
 491                 len     -= chunk_len;
 492         }
 493 }
 494
 495 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
 496 static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
 497                         u8 *data,               /* interrupt packet data */
 498                         int len)                /* interrupt packet length */
 499 {
 500         int ret = -EINVAL;
 501
 502         if (len == 1 && data[0] == 0x80) {
 503                 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
 504                 input_sync(gspca_dev->input_dev);
 505                 ret = 0;
 506         }
 507
 508         if (len == 1 && data[0] == 0x88) {
 509                 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
 510                 input_sync(gspca_dev->input_dev);
 511                 ret = 0;
 512         }
 513
 514         return ret;
 515 }
 516 #endif
 517
 518 static int stv06xx_config(struct gspca_dev *gspca_dev,
 519                           const struct usb_device_id *id);
 520
 521 /* sub-driver description */
 522 static const struct sd_desc sd_desc = {
 523         .name = MODULE_NAME,
 524         .config = stv06xx_config,
 525         .init = stv06xx_init,
 526         .init_controls = stv06xx_init_controls,
 527         .start = stv06xx_start,
 528         .stopN = stv06xx_stopN,
 529         .pkt_scan = stv06xx_pkt_scan,
 530         .isoc_init = stv06xx_isoc_init,
 531         .isoc_nego = stv06xx_isoc_nego,
 532 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
 533         .int_pkt_scan = sd_int_pkt_scan,
 534 #endif
 535 };
 536
 537 /* This function is called at probe time */
 538 static int stv06xx_config(struct gspca_dev *gspca_dev,
 539                           const struct usb_device_id *id)
 540 {
 541         struct sd *sd = (struct sd *) gspca_dev;
 542
 543         PDEBUG(D_PROBE, "Configuring camera");
 544
 545         sd->bridge = id->driver_info;
 546         gspca_dev->sd_desc = &sd_desc;
 547
 548         if (dump_bridge)
 549                 stv06xx_dump_bridge(sd);
 550
 551         sd->sensor = &stv06xx_sensor_st6422;
 552         if (!sd->sensor->probe(sd))
 553                 return 0;
 554
 555         sd->sensor = &stv06xx_sensor_vv6410;
 556         if (!sd->sensor->probe(sd))
 557                 return 0;
 558
 559         sd->sensor = &stv06xx_sensor_hdcs1x00;
 560         if (!sd->sensor->probe(sd))
 561                 return 0;
 562
 563         sd->sensor = &stv06xx_sensor_hdcs1020;
 564         if (!sd->sensor->probe(sd))
 565                 return 0;
 566
 567         sd->sensor = &stv06xx_sensor_pb0100;
 568         if (!sd->sensor->probe(sd))
 569                 return 0;
 570
 571         sd->sensor = NULL;
 572         return -ENODEV;
 573 }
 574
 575
 576
 577 /* -- module initialisation -- */
 578 static const struct usb_device_id device_table[] = {
 579         /* QuickCam Express */
 580         {USB_DEVICE(0x046d, 0x0840), .driver_info = BRIDGE_STV600 },
 581         /* LEGO cam / QuickCam Web */
 582         {USB_DEVICE(0x046d, 0x0850), .driver_info = BRIDGE_STV610 },
 583         /* Dexxa WebCam USB */
 584         {USB_DEVICE(0x046d, 0x0870), .driver_info = BRIDGE_STV602 },
 585         /* QuickCam Messenger */
 586         {USB_DEVICE(0x046D, 0x08F0), .driver_info = BRIDGE_ST6422 },
 587         /* QuickCam Communicate */
 588         {USB_DEVICE(0x046D, 0x08F5), .driver_info = BRIDGE_ST6422 },
 589         /* QuickCam Messenger (new) */
 590         {USB_DEVICE(0x046D, 0x08F6), .driver_info = BRIDGE_ST6422 },
 591         {}
 592 };
 593 MODULE_DEVICE_TABLE(usb, device_table);
 594
 595 /* -- device connect -- */
 596 static int sd_probe(struct usb_interface *intf,
 597                         const struct usb_device_id *id)
 598 {
 599         PDEBUG(D_PROBE, "Probing for a stv06xx device");
 600         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 601                                THIS_MODULE);
 602 }
 603
 604 static void sd_disconnect(struct usb_interface *intf)
 605 {
 606         struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
 607         struct sd *sd = (struct sd *) gspca_dev;
 608         void *priv = sd->sensor_priv;
 609         PDEBUG(D_PROBE, "Disconnecting the stv06xx device");
 610
 611         sd->sensor = NULL;
 612         gspca_disconnect(intf);
 613         kfree(priv);
 614 }
 615
 616 static struct usb_driver sd_driver = {
 617         .name = MODULE_NAME,
 618         .id_table = device_table,
 619         .probe = sd_probe,
 620         .disconnect = sd_disconnect,
 621 #ifdef CONFIG_PM
 622         .suspend = gspca_suspend,
 623         .resume = gspca_resume,
 624         .reset_resume = gspca_resume,
 625 #endif
 626 };
 627
 628 module_usb_driver(sd_driver);
 629
 630 module_param(dump_bridge, bool, S_IRUGO | S_IWUSR);
 631 MODULE_PARM_DESC(dump_bridge, "Dumps all usb bridge registers at startup");
 632
 633 module_param(dump_sensor, bool, S_IRUGO | S_IWUSR);
 634 MODULE_PARM_DESC(dump_sensor, "Dumps all sensor registers at startup");