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 packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize); 295 err = stv06xx_write_bridge(sd, STV_ISO_SIZE_L, packet_size); 296 if (err < 0) 297 return err; 298 299 /* Prepare the sensor for start */ 300 err = sd->sensor->start(sd); 301 if (err < 0) 302 goto out; 303 304 /* Start isochronous streaming */ 305 err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 1); 306 307 out: 308 if (err < 0) 309 gspca_dbg(gspca_dev, D_STREAM, "Starting stream failed\n"); 310 else 311 gspca_dbg(gspca_dev, D_STREAM, "Started streaming\n"); 312 313 return (err < 0) ? err : 0; 314 } 315 316 static int stv06xx_isoc_init(struct gspca_dev *gspca_dev) 317 { 318 struct usb_host_interface *alt; 319 struct sd *sd = (struct sd *) gspca_dev; 320 321 /* Start isoc bandwidth "negotiation" at max isoc bandwidth */ 322 alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1]; 323 alt->endpoint[0].desc.wMaxPacketSize = 324 cpu_to_le16(sd->sensor->max_packet_size[gspca_dev->curr_mode]); 325 326 return 0; 327 } 328 329 static int stv06xx_isoc_nego(struct gspca_dev *gspca_dev) 330 { 331 int ret, packet_size, min_packet_size; 332 struct usb_host_interface *alt; 333 struct sd *sd = (struct sd *) gspca_dev; 334 335 alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1]; 336 packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize); 337 min_packet_size = sd->sensor->min_packet_size[gspca_dev->curr_mode]; 338 if (packet_size <= min_packet_size) 339 return -EIO; 340 341 packet_size -= 100; 342 if (packet_size < min_packet_size) 343 packet_size = min_packet_size; 344 alt->endpoint[0].desc.wMaxPacketSize = cpu_to_le16(packet_size); 345 346 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1); 347 if (ret < 0) 348 gspca_err(gspca_dev, "set alt 1 err %d\n", ret); 349 350 return ret; 351 } 352 353 static void stv06xx_stopN(struct gspca_dev *gspca_dev) 354 { 355 int err; 356 struct sd *sd = (struct sd *) gspca_dev; 357 358 /* stop ISO-streaming */ 359 err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 0); 360 if (err < 0) 361 goto out; 362 363 err = sd->sensor->stop(sd); 364 365 out: 366 if (err < 0) 367 gspca_dbg(gspca_dev, D_STREAM, "Failed to stop stream\n"); 368 else 369 gspca_dbg(gspca_dev, D_STREAM, "Stopped streaming\n"); 370 } 371 372 /* 373 * Analyse an USB packet of the data stream and store it appropriately. 374 * Each packet contains an integral number of chunks. Each chunk has 375 * 2-bytes identification, followed by 2-bytes that describe the chunk 376 * length. Known/guessed chunk identifications are: 377 * 8001/8005/C001/C005 - Begin new frame 378 * 8002/8006/C002/C006 - End frame 379 * 0200/4200 - Contains actual image data, bayer or compressed 380 * 0005 - 11 bytes of unknown data 381 * 0100 - 2 bytes of unknown data 382 * The 0005 and 0100 chunks seem to appear only in compressed stream. 383 */ 384 static void stv06xx_pkt_scan(struct gspca_dev *gspca_dev, 385 u8 *data, /* isoc packet */ 386 int len) /* iso packet length */ 387 { 388 struct sd *sd = (struct sd *) gspca_dev; 389 390 gspca_dbg(gspca_dev, D_PACK, "Packet of length %d arrived\n", len); 391 392 /* A packet may contain several frames 393 loop until the whole packet is reached */ 394 while (len) { 395 int id, chunk_len; 396 397 if (len < 4) { 398 gspca_dbg(gspca_dev, D_PACK, "Packet is smaller than 4 bytes\n"); 399 return; 400 } 401 402 /* Capture the id */ 403 id = (data[0] << 8) | data[1]; 404 405 /* Capture the chunk length */ 406 chunk_len = (data[2] << 8) | data[3]; 407 gspca_dbg(gspca_dev, D_PACK, "Chunk id: %x, length: %d\n", 408 id, chunk_len); 409 410 data += 4; 411 len -= 4; 412 413 if (len < chunk_len) { 414 gspca_err(gspca_dev, "URB packet length is smaller than the specified chunk length\n"); 415 gspca_dev->last_packet_type = DISCARD_PACKET; 416 return; 417 } 418 419 /* First byte seem to be 02=data 2nd byte is unknown??? */ 420 if (sd->bridge == BRIDGE_ST6422 && (id & 0xff00) == 0x0200) 421 goto frame_data; 422 423 switch (id) { 424 case 0x0200: 425 case 0x4200: 426 frame_data: 427 gspca_dbg(gspca_dev, D_PACK, "Frame data packet detected\n"); 428 429 if (sd->to_skip) { 430 int skip = (sd->to_skip < chunk_len) ? 431 sd->to_skip : chunk_len; 432 data += skip; 433 len -= skip; 434 chunk_len -= skip; 435 sd->to_skip -= skip; 436 } 437 438 gspca_frame_add(gspca_dev, INTER_PACKET, 439 data, chunk_len); 440 break; 441 442 case 0x8001: 443 case 0x8005: 444 case 0xc001: 445 case 0xc005: 446 gspca_dbg(gspca_dev, D_PACK, "Starting new frame\n"); 447 448 /* Create a new frame, chunk length should be zero */ 449 gspca_frame_add(gspca_dev, FIRST_PACKET, 450 NULL, 0); 451 452 if (sd->bridge == BRIDGE_ST6422) 453 sd->to_skip = gspca_dev->pixfmt.width * 4; 454 455 if (chunk_len) 456 gspca_err(gspca_dev, "Chunk length is non-zero on a SOF\n"); 457 break; 458 459 case 0x8002: 460 case 0x8006: 461 case 0xc002: 462 gspca_dbg(gspca_dev, D_PACK, "End of frame detected\n"); 463 464 /* Complete the last frame (if any) */ 465 gspca_frame_add(gspca_dev, LAST_PACKET, 466 NULL, 0); 467 468 if (chunk_len) 469 gspca_err(gspca_dev, "Chunk length is non-zero on a EOF\n"); 470 break; 471 472 case 0x0005: 473 gspca_dbg(gspca_dev, D_PACK, "Chunk 0x005 detected\n"); 474 /* Unknown chunk with 11 bytes of data, 475 occurs just before end of each frame 476 in compressed mode */ 477 break; 478 479 case 0x0100: 480 gspca_dbg(gspca_dev, D_PACK, "Chunk 0x0100 detected\n"); 481 /* Unknown chunk with 2 bytes of data, 482 occurs 2-3 times per USB interrupt */ 483 break; 484 case 0x42ff: 485 gspca_dbg(gspca_dev, D_PACK, "Chunk 0x42ff detected\n"); 486 /* Special chunk seen sometimes on the ST6422 */ 487 break; 488 default: 489 gspca_dbg(gspca_dev, D_PACK, "Unknown chunk 0x%04x detected\n", 490 id); 491 /* Unknown chunk */ 492 } 493 data += chunk_len; 494 len -= chunk_len; 495 } 496 } 497 498 #if IS_ENABLED(CONFIG_INPUT) 499 static int sd_int_pkt_scan(struct gspca_dev *gspca_dev, 500 u8 *data, /* interrupt packet data */ 501 int len) /* interrupt packet length */ 502 { 503 int ret = -EINVAL; 504 505 if (len == 1 && (data[0] == 0x80 || data[0] == 0x10)) { 506 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1); 507 input_sync(gspca_dev->input_dev); 508 ret = 0; 509 } 510 511 if (len == 1 && (data[0] == 0x88 || data[0] == 0x11)) { 512 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0); 513 input_sync(gspca_dev->input_dev); 514 ret = 0; 515 } 516 517 return ret; 518 } 519 #endif 520 521 static int stv06xx_config(struct gspca_dev *gspca_dev, 522 const struct usb_device_id *id); 523 524 /* sub-driver description */ 525 static const struct sd_desc sd_desc = { 526 .name = MODULE_NAME, 527 .config = stv06xx_config, 528 .init = stv06xx_init, 529 .init_controls = stv06xx_init_controls, 530 .start = stv06xx_start, 531 .stopN = stv06xx_stopN, 532 .pkt_scan = stv06xx_pkt_scan, 533 .isoc_init = stv06xx_isoc_init, 534 .isoc_nego = stv06xx_isoc_nego, 535 #if IS_ENABLED(CONFIG_INPUT) 536 .int_pkt_scan = sd_int_pkt_scan, 537 #endif 538 }; 539 540 /* This function is called at probe time */ 541 static int stv06xx_config(struct gspca_dev *gspca_dev, 542 const struct usb_device_id *id) 543 { 544 struct sd *sd = (struct sd *) gspca_dev; 545 546 gspca_dbg(gspca_dev, D_PROBE, "Configuring camera\n"); 547 548 sd->bridge = id->driver_info; 549 gspca_dev->sd_desc = &sd_desc; 550 551 if (dump_bridge) 552 stv06xx_dump_bridge(sd); 553 554 sd->sensor = &stv06xx_sensor_st6422; 555 if (!sd->sensor->probe(sd)) 556 return 0; 557 558 sd->sensor = &stv06xx_sensor_vv6410; 559 if (!sd->sensor->probe(sd)) 560 return 0; 561 562 sd->sensor = &stv06xx_sensor_hdcs1x00; 563 if (!sd->sensor->probe(sd)) 564 return 0; 565 566 sd->sensor = &stv06xx_sensor_hdcs1020; 567 if (!sd->sensor->probe(sd)) 568 return 0; 569 570 sd->sensor = &stv06xx_sensor_pb0100; 571 if (!sd->sensor->probe(sd)) 572 return 0; 573 574 sd->sensor = NULL; 575 return -ENODEV; 576 } 577 578 579 580 /* -- module initialisation -- */ 581 static const struct usb_device_id device_table[] = { 582 {USB_DEVICE(0x046d, 0x0840), .driver_info = BRIDGE_STV600 }, /* QuickCam Express */ 583 {USB_DEVICE(0x046d, 0x0850), .driver_info = BRIDGE_STV610 }, /* LEGO cam / QuickCam Web */ 584 {USB_DEVICE(0x046d, 0x0870), .driver_info = BRIDGE_STV602 }, /* Dexxa WebCam USB */ 585 {USB_DEVICE(0x046D, 0x08F0), .driver_info = BRIDGE_ST6422 }, /* QuickCam Messenger */ 586 {USB_DEVICE(0x046D, 0x08F5), .driver_info = BRIDGE_ST6422 }, /* QuickCam Communicate */ 587 {USB_DEVICE(0x046D, 0x08F6), .driver_info = BRIDGE_ST6422 }, /* QuickCam Messenger (new) */ 588 {} 589 }; 590 MODULE_DEVICE_TABLE(usb, device_table); 591 592 /* -- device connect -- */ 593 static int sd_probe(struct usb_interface *intf, 594 const struct usb_device_id *id) 595 { 596 return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd), 597 THIS_MODULE); 598 } 599 600 static void sd_disconnect(struct usb_interface *intf) 601 { 602 struct gspca_dev *gspca_dev = usb_get_intfdata(intf); 603 struct sd *sd = (struct sd *) gspca_dev; 604 void *priv = sd->sensor_priv; 605 gspca_dbg(gspca_dev, D_PROBE, "Disconnecting the stv06xx device\n"); 606 607 sd->sensor = NULL; 608 gspca_disconnect(intf); 609 kfree(priv); 610 } 611 612 static struct usb_driver sd_driver = { 613 .name = MODULE_NAME, 614 .id_table = device_table, 615 .probe = sd_probe, 616 .disconnect = sd_disconnect, 617 #ifdef CONFIG_PM 618 .suspend = gspca_suspend, 619 .resume = gspca_resume, 620 .reset_resume = gspca_resume, 621 #endif 622 }; 623 624 module_usb_driver(sd_driver); 625 626 module_param(dump_bridge, bool, S_IRUGO | S_IWUSR); 627 MODULE_PARM_DESC(dump_bridge, "Dumps all usb bridge registers at startup"); 628 629 module_param(dump_sensor, bool, S_IRUGO | S_IWUSR); 630 MODULE_PARM_DESC(dump_sensor, "Dumps all sensor registers at startup"); 631