drivers/hid/usbhid/hid-core.c

   1 /*
   2  *  USB HID support for Linux
   3  *
   4  *  Copyright (c) 1999 Andreas Gal
   5  *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
   6  *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
   7  *  Copyright (c) 2006-2007 Jiri Kosina
   8  */
   9
  10 /*
  11  * This program is free software; you can redistribute it and/or modify it
  12  * under the terms of the GNU General Public License as published by the Free
  13  * Software Foundation; either version 2 of the License, or (at your option)
  14  * any later version.
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/slab.h>
  19 #include <linux/init.h>
  20 #include <linux/kernel.h>
  21 #include <linux/list.h>
  22 #include <linux/mm.h>
  23 #include <linux/smp_lock.h>
  24 #include <linux/spinlock.h>
  25 #include <asm/unaligned.h>
  26 #include <asm/byteorder.h>
  27 #include <linux/input.h>
  28 #include <linux/wait.h>
  29
  30 #include <linux/usb.h>
  31
  32 #include <linux/hid.h>
  33 #include <linux/hiddev.h>
  34 #include <linux/hid-debug.h>
  35 #include <linux/hidraw.h>
  36 #include "usbhid.h"
  37
  38 /*
  39  * Version Information
  40  */
  41
  42 #define DRIVER_VERSION "v2.6"
  43 #define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik, Jiri Kosina"
  44 #define DRIVER_DESC "USB HID core driver"
  45 #define DRIVER_LICENSE "GPL"
  46
  47 static char *hid_types[] = {"Device", "Pointer", "Mouse", "Device", "Joystick",
  48                                 "Gamepad", "Keyboard", "Keypad", "Multi-Axis Controller"};
  49 /*
  50  * Module parameters.
  51  */
  52
  53 static unsigned int hid_mousepoll_interval;
  54 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
  55 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
  56
  57 /* Quirks specified at module load time */
  58 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
  59 module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
  60 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
  61                 " quirks=vendorID:productID:quirks"
  62                 " where vendorID, productID, and quirks are all in"
  63                 " 0x-prefixed hex");
  64 /*
  65  * Input submission and I/O error handler.
  66  */
  67
  68 static void hid_io_error(struct hid_device *hid);
  69
  70 /* Start up the input URB */
  71 static int hid_start_in(struct hid_device *hid)
  72 {
  73         unsigned long flags;
  74         int rc = 0;
  75         struct usbhid_device *usbhid = hid->driver_data;
  76
  77         spin_lock_irqsave(&usbhid->inlock, flags);
  78         if (hid->open > 0 && !test_bit(HID_SUSPENDED, &usbhid->iofl) &&
  79                         !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
  80                         !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
  81                 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
  82                 if (rc != 0)
  83                         clear_bit(HID_IN_RUNNING, &usbhid->iofl);
  84         }
  85         spin_unlock_irqrestore(&usbhid->inlock, flags);
  86         return rc;
  87 }
  88
  89 /* I/O retry timer routine */
  90 static void hid_retry_timeout(unsigned long _hid)
  91 {
  92         struct hid_device *hid = (struct hid_device *) _hid;
  93         struct usbhid_device *usbhid = hid->driver_data;
  94
  95         dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
  96         if (hid_start_in(hid))
  97                 hid_io_error(hid);
  98 }
  99
 100 /* Workqueue routine to reset the device or clear a halt */
 101 static void hid_reset(struct work_struct *work)
 102 {
 103         struct usbhid_device *usbhid =
 104                 container_of(work, struct usbhid_device, reset_work);
 105         struct hid_device *hid = usbhid->hid;
 106         int rc_lock, rc = 0;
 107
 108         if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
 109                 dev_dbg(&usbhid->intf->dev, "clear halt\n");
 110                 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
 111                 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
 112                 hid_start_in(hid);
 113         }
 114
 115         else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
 116                 dev_dbg(&usbhid->intf->dev, "resetting device\n");
 117                 rc = rc_lock = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
 118                 if (rc_lock >= 0) {
 119                         rc = usb_reset_device(hid_to_usb_dev(hid));
 120                         if (rc_lock)
 121                                 usb_unlock_device(hid_to_usb_dev(hid));
 122                 }
 123                 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
 124         }
 125
 126         switch (rc) {
 127         case 0:
 128                 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
 129                         hid_io_error(hid);
 130                 break;
 131         default:
 132                 err_hid("can't reset device, %s-%s/input%d, status %d",
 133                                 hid_to_usb_dev(hid)->bus->bus_name,
 134                                 hid_to_usb_dev(hid)->devpath,
 135                                 usbhid->ifnum, rc);
 136                 /* FALLTHROUGH */
 137         case -EHOSTUNREACH:
 138         case -ENODEV:
 139         case -EINTR:
 140                 break;
 141         }
 142 }
 143
 144 /* Main I/O error handler */
 145 static void hid_io_error(struct hid_device *hid)
 146 {
 147         unsigned long flags;
 148         struct usbhid_device *usbhid = hid->driver_data;
 149
 150         spin_lock_irqsave(&usbhid->inlock, flags);
 151
 152         /* Stop when disconnected */
 153         if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
 154                 goto done;
 155
 156         /* If it has been a while since the last error, we'll assume
 157          * this a brand new error and reset the retry timeout. */
 158         if (time_after(jiffies, usbhid->stop_retry + HZ/2))
 159                 usbhid->retry_delay = 0;
 160
 161         /* When an error occurs, retry at increasing intervals */
 162         if (usbhid->retry_delay == 0) {
 163                 usbhid->retry_delay = 13;       /* Then 26, 52, 104, 104, ... */
 164                 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
 165         } else if (usbhid->retry_delay < 100)
 166                 usbhid->retry_delay *= 2;
 167
 168         if (time_after(jiffies, usbhid->stop_retry)) {
 169
 170                 /* Retries failed, so do a port reset */
 171                 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
 172                         schedule_work(&usbhid->reset_work);
 173                         goto done;
 174                 }
 175         }
 176
 177         mod_timer(&usbhid->io_retry,
 178                         jiffies + msecs_to_jiffies(usbhid->retry_delay));
 179 done:
 180         spin_unlock_irqrestore(&usbhid->inlock, flags);
 181 }
 182
 183 /*
 184  * Input interrupt completion handler.
 185  */
 186
 187 static void hid_irq_in(struct urb *urb)
 188 {
 189         struct hid_device       *hid = urb->context;
 190         struct usbhid_device    *usbhid = hid->driver_data;
 191         int                     status;
 192
 193         switch (urb->status) {
 194         case 0:                 /* success */
 195                 usbhid->retry_delay = 0;
 196                 hid_input_report(urb->context, HID_INPUT_REPORT,
 197                                  urb->transfer_buffer,
 198                                  urb->actual_length, 1);
 199                 break;
 200         case -EPIPE:            /* stall */
 201                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 202                 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
 203                 schedule_work(&usbhid->reset_work);
 204                 return;
 205         case -ECONNRESET:       /* unlink */
 206         case -ENOENT:
 207         case -ESHUTDOWN:        /* unplug */
 208                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 209                 return;
 210         case -EILSEQ:           /* protocol error or unplug */
 211         case -EPROTO:           /* protocol error or unplug */
 212         case -ETIME:            /* protocol error or unplug */
 213         case -ETIMEDOUT:        /* Should never happen, but... */
 214                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 215                 hid_io_error(hid);
 216                 return;
 217         default:                /* error */
 218                 warn("input irq status %d received", urb->status);
 219         }
 220
 221         status = usb_submit_urb(urb, GFP_ATOMIC);
 222         if (status) {
 223                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 224                 if (status != -EPERM) {
 225                         err_hid("can't resubmit intr, %s-%s/input%d, status %d",
 226                                         hid_to_usb_dev(hid)->bus->bus_name,
 227                                         hid_to_usb_dev(hid)->devpath,
 228                                         usbhid->ifnum, status);
 229                         hid_io_error(hid);
 230                 }
 231         }
 232 }
 233
 234 static int hid_submit_out(struct hid_device *hid)
 235 {
 236         struct hid_report *report;
 237         struct usbhid_device *usbhid = hid->driver_data;
 238
 239         report = usbhid->out[usbhid->outtail];
 240
 241         hid_output_report(report, usbhid->outbuf);
 242         usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 243         usbhid->urbout->dev = hid_to_usb_dev(hid);
 244
 245         dbg_hid("submitting out urb\n");
 246
 247         if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
 248                 err_hid("usb_submit_urb(out) failed");
 249                 return -1;
 250         }
 251
 252         return 0;
 253 }
 254
 255 static int hid_submit_ctrl(struct hid_device *hid)
 256 {
 257         struct hid_report *report;
 258         unsigned char dir;
 259         int len;
 260         struct usbhid_device *usbhid = hid->driver_data;
 261
 262         report = usbhid->ctrl[usbhid->ctrltail].report;
 263         dir = usbhid->ctrl[usbhid->ctrltail].dir;
 264
 265         len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 266         if (dir == USB_DIR_OUT) {
 267                 hid_output_report(report, usbhid->ctrlbuf);
 268                 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
 269                 usbhid->urbctrl->transfer_buffer_length = len;
 270         } else {
 271                 int maxpacket, padlen;
 272
 273                 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
 274                 maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
 275                 if (maxpacket > 0) {
 276                         padlen = DIV_ROUND_UP(len, maxpacket);
 277                         padlen *= maxpacket;
 278                         if (padlen > usbhid->bufsize)
 279                                 padlen = usbhid->bufsize;
 280                 } else
 281                         padlen = 0;
 282                 usbhid->urbctrl->transfer_buffer_length = padlen;
 283         }
 284         usbhid->urbctrl->dev = hid_to_usb_dev(hid);
 285
 286         usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
 287         usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
 288         usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
 289         usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
 290         usbhid->cr->wLength = cpu_to_le16(len);
 291
 292         dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
 293                 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
 294                 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
 295
 296         if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
 297                 err_hid("usb_submit_urb(ctrl) failed");
 298                 return -1;
 299         }
 300
 301         return 0;
 302 }
 303
 304 /*
 305  * Output interrupt completion handler.
 306  */
 307
 308 static void hid_irq_out(struct urb *urb)
 309 {
 310         struct hid_device *hid = urb->context;
 311         struct usbhid_device *usbhid = hid->driver_data;
 312         unsigned long flags;
 313         int unplug = 0;
 314
 315         switch (urb->status) {
 316         case 0:                 /* success */
 317                 break;
 318         case -ESHUTDOWN:        /* unplug */
 319                 unplug = 1;
 320         case -EILSEQ:           /* protocol error or unplug */
 321         case -EPROTO:           /* protocol error or unplug */
 322         case -ECONNRESET:       /* unlink */
 323         case -ENOENT:
 324                 break;
 325         default:                /* error */
 326                 warn("output irq status %d received", urb->status);
 327         }
 328
 329         spin_lock_irqsave(&usbhid->outlock, flags);
 330
 331         if (unplug)
 332                 usbhid->outtail = usbhid->outhead;
 333         else
 334                 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
 335
 336         if (usbhid->outhead != usbhid->outtail) {
 337                 if (hid_submit_out(hid)) {
 338                         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 339                         wake_up(&usbhid->wait);
 340                 }
 341                 spin_unlock_irqrestore(&usbhid->outlock, flags);
 342                 return;
 343         }
 344
 345         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 346         spin_unlock_irqrestore(&usbhid->outlock, flags);
 347         wake_up(&usbhid->wait);
 348 }
 349
 350 /*
 351  * Control pipe completion handler.
 352  */
 353
 354 static void hid_ctrl(struct urb *urb)
 355 {
 356         struct hid_device *hid = urb->context;
 357         struct usbhid_device *usbhid = hid->driver_data;
 358         unsigned long flags;
 359         int unplug = 0;
 360
 361         spin_lock_irqsave(&usbhid->ctrllock, flags);
 362
 363         switch (urb->status) {
 364         case 0:                 /* success */
 365                 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
 366                         hid_input_report(urb->context,
 367                                 usbhid->ctrl[usbhid->ctrltail].report->type,
 368                                 urb->transfer_buffer, urb->actual_length, 0);
 369                 break;
 370         case -ESHUTDOWN:        /* unplug */
 371                 unplug = 1;
 372         case -EILSEQ:           /* protocol error or unplug */
 373         case -EPROTO:           /* protocol error or unplug */
 374         case -ECONNRESET:       /* unlink */
 375         case -ENOENT:
 376         case -EPIPE:            /* report not available */
 377                 break;
 378         default:                /* error */
 379                 warn("ctrl urb status %d received", urb->status);
 380         }
 381
 382         if (unplug)
 383                 usbhid->ctrltail = usbhid->ctrlhead;
 384         else
 385                 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
 386
 387         if (usbhid->ctrlhead != usbhid->ctrltail) {
 388                 if (hid_submit_ctrl(hid)) {
 389                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 390                         wake_up(&usbhid->wait);
 391                 }
 392                 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
 393                 return;
 394         }
 395
 396         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 397         spin_unlock_irqrestore(&usbhid->ctrllock, flags);
 398         wake_up(&usbhid->wait);
 399 }
 400
 401 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
 402 {
 403         int head;
 404         unsigned long flags;
 405         struct usbhid_device *usbhid = hid->driver_data;
 406
 407         if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
 408                 return;
 409
 410         if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
 411
 412                 spin_lock_irqsave(&usbhid->outlock, flags);
 413
 414                 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
 415                         spin_unlock_irqrestore(&usbhid->outlock, flags);
 416                         warn("output queue full");
 417                         return;
 418                 }
 419
 420                 usbhid->out[usbhid->outhead] = report;
 421                 usbhid->outhead = head;
 422
 423                 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl))
 424                         if (hid_submit_out(hid))
 425                                 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 426
 427                 spin_unlock_irqrestore(&usbhid->outlock, flags);
 428                 return;
 429         }
 430
 431         spin_lock_irqsave(&usbhid->ctrllock, flags);
 432
 433         if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
 434                 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
 435                 warn("control queue full");
 436                 return;
 437         }
 438
 439         usbhid->ctrl[usbhid->ctrlhead].report = report;
 440         usbhid->ctrl[usbhid->ctrlhead].dir = dir;
 441         usbhid->ctrlhead = head;
 442
 443         if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
 444                 if (hid_submit_ctrl(hid))
 445                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 446
 447         spin_unlock_irqrestore(&usbhid->ctrllock, flags);
 448 }
 449
 450 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
 451 {
 452         struct hid_device *hid = input_get_drvdata(dev);
 453         struct hid_field *field;
 454         int offset;
 455
 456         if (type == EV_FF)
 457                 return input_ff_event(dev, type, code, value);
 458
 459         if (type != EV_LED)
 460                 return -1;
 461
 462         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
 463                 warn("event field not found");
 464                 return -1;
 465         }
 466
 467         hid_set_field(field, offset, value);
 468         usbhid_submit_report(hid, field->report, USB_DIR_OUT);
 469
 470         return 0;
 471 }
 472
 473 int usbhid_wait_io(struct hid_device *hid)
 474 {
 475         struct usbhid_device *usbhid = hid->driver_data;
 476
 477         if (!wait_event_timeout(usbhid->wait,
 478                                 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
 479                                 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
 480                                         10*HZ)) {
 481                 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
 482                 return -1;
 483         }
 484
 485         return 0;
 486 }
 487
 488 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
 489 {
 490         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 491                 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
 492                 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
 493 }
 494
 495 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
 496                 unsigned char type, void *buf, int size)
 497 {
 498         int result, retries = 4;
 499
 500         memset(buf, 0, size);
 501
 502         do {
 503                 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 504                                 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
 505                                 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
 506                 retries--;
 507         } while (result < size && retries);
 508         return result;
 509 }
 510
 511 int usbhid_open(struct hid_device *hid)
 512 {
 513         struct usbhid_device *usbhid = hid->driver_data;
 514         int res;
 515
 516         if (!hid->open++) {
 517                 res = usb_autopm_get_interface(usbhid->intf);
 518                 if (res < 0) {
 519                         hid->open--;
 520                         return -EIO;
 521                 }
 522         }
 523         if (hid_start_in(hid))
 524                 hid_io_error(hid);
 525         return 0;
 526 }
 527
 528 void usbhid_close(struct hid_device *hid)
 529 {
 530         struct usbhid_device *usbhid = hid->driver_data;
 531
 532         if (!--hid->open) {
 533                 usb_kill_urb(usbhid->urbin);
 534                 usb_autopm_put_interface(usbhid->intf);
 535         }
 536 }
 537
 538 /*
 539  * Initialize all reports
 540  */
 541
 542 void usbhid_init_reports(struct hid_device *hid)
 543 {
 544         struct hid_report *report;
 545         struct usbhid_device *usbhid = hid->driver_data;
 546         int err, ret;
 547
 548         list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
 549                 usbhid_submit_report(hid, report, USB_DIR_IN);
 550
 551         list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
 552                 usbhid_submit_report(hid, report, USB_DIR_IN);
 553
 554         err = 0;
 555         ret = usbhid_wait_io(hid);
 556         while (ret) {
 557                 err |= ret;
 558                 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
 559                         usb_kill_urb(usbhid->urbctrl);
 560                 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
 561                         usb_kill_urb(usbhid->urbout);
 562                 ret = usbhid_wait_io(hid);
 563         }
 564
 565         if (err)
 566                 warn("timeout initializing reports");
 567 }
 568
 569 /*
 570  * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
 571  */
 572 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
 573     unsigned int hid_code, struct hid_field **pfield)
 574 {
 575         struct hid_report *report;
 576         struct hid_field *field;
 577         struct hid_usage *usage;
 578         int i, j;
 579
 580         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
 581                 for (i = 0; i < report->maxfield; i++) {
 582                         field = report->field[i];
 583                         for (j = 0; j < field->maxusage; j++) {
 584                                 usage = &field->usage[j];
 585                                 if ((usage->hid & HID_USAGE_PAGE) == page &&
 586                                     (usage->hid & 0xFFFF) == hid_code) {
 587                                         *pfield = field;
 588                                         return j;
 589                                 }
 590                         }
 591                 }
 592         }
 593         return -1;
 594 }
 595
 596 static void usbhid_set_leds(struct hid_device *hid)
 597 {
 598         struct hid_field *field;
 599         int offset;
 600
 601         if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
 602                 hid_set_field(field, offset, 0);
 603                 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
 604         }
 605 }
 606
 607 /*
 608  * Traverse the supplied list of reports and find the longest
 609  */
 610 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
 611                 unsigned int *max)
 612 {
 613         struct hid_report *report;
 614         unsigned int size;
 615
 616         list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
 617                 size = ((report->size - 1) >> 3) + 1;
 618                 if (type == HID_INPUT_REPORT && hid->report_enum[type].numbered)
 619                         size++;
 620                 if (*max < size)
 621                         *max = size;
 622         }
 623 }
 624
 625 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
 626 {
 627         struct usbhid_device *usbhid = hid->driver_data;
 628
 629         if (!(usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->inbuf_dma)))
 630                 return -1;
 631         if (!(usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->outbuf_dma)))
 632                 return -1;
 633         if (!(usbhid->cr = usb_buffer_alloc(dev, sizeof(*(usbhid->cr)), GFP_ATOMIC, &usbhid->cr_dma)))
 634                 return -1;
 635         if (!(usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->ctrlbuf_dma)))
 636                 return -1;
 637
 638         return 0;
 639 }
 640
 641 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
 642 {
 643         struct usbhid_device *usbhid = hid->driver_data;
 644         struct usb_device *dev = hid_to_usb_dev(hid);
 645         struct usb_interface *intf = usbhid->intf;
 646         struct usb_host_interface *interface = intf->cur_altsetting;
 647         int ret;
 648
 649         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 650                 HID_REQ_SET_REPORT,
 651                 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 652                 ((HID_OUTPUT_REPORT + 1) << 8) | *buf,
 653                 interface->desc.bInterfaceNumber, buf + 1, count - 1,
 654                 USB_CTRL_SET_TIMEOUT);
 655
 656         /* count also the report id */
 657         if (ret > 0)
 658                 ret++;
 659
 660         return ret;
 661 }
 662
 663 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
 664 {
 665         struct usbhid_device *usbhid = hid->driver_data;
 666
 667         usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
 668         usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
 669         usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
 670         usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
 671 }
 672
 673 /*
 674  * Sending HID_REQ_GET_REPORT changes the operation mode of the ps3 controller
 675  * to "operational".  Without this, the ps3 controller will not report any
 676  * events.
 677  */
 678 static void hid_fixup_sony_ps3_controller(struct usb_device *dev, int ifnum)
 679 {
 680         int result;
 681         char *buf = kmalloc(18, GFP_KERNEL);
 682
 683         if (!buf)
 684                 return;
 685
 686         result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 687                                  HID_REQ_GET_REPORT,
 688                                  USB_DIR_IN | USB_TYPE_CLASS |
 689                                  USB_RECIP_INTERFACE,
 690                                  (3 << 8) | 0xf2, ifnum, buf, 17,
 691                                  USB_CTRL_GET_TIMEOUT);
 692
 693         if (result < 0)
 694                 err_hid("%s failed: %d\n", __func__, result);
 695
 696         kfree(buf);
 697 }
 698
 699 static int usbhid_start_finish(struct hid_device *hid)
 700 {
 701         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
 702         char path[64], *type;
 703         unsigned int i;
 704
 705         usbhid_init_reports(hid);
 706         hid_dump_device(hid);
 707         if (hid->quirks & HID_QUIRK_RESET_LEDS)
 708                 usbhid_set_leds(hid);
 709
 710         if (!hidinput_connect(hid))
 711                 hid->claimed |= HID_CLAIMED_INPUT;
 712         if (!hiddev_connect(hid))
 713                 hid->claimed |= HID_CLAIMED_HIDDEV;
 714         if (!hidraw_connect(hid))
 715                 hid->claimed |= HID_CLAIMED_HIDRAW;
 716
 717         if (!hid->claimed) {
 718                 printk(KERN_ERR "HID device claimed by neither input, hiddev "
 719                                 "nor hidraw\n");
 720                 return -ENODEV;
 721         }
 722
 723         if ((hid->claimed & HID_CLAIMED_INPUT))
 724                 hid_ff_init(hid);
 725
 726         if (hid->quirks & HID_QUIRK_SONY_PS3_CONTROLLER)
 727                 hid_fixup_sony_ps3_controller(interface_to_usbdev(intf),
 728                         intf->cur_altsetting->desc.bInterfaceNumber);
 729
 730         printk(KERN_INFO);
 731
 732         if (hid->claimed & HID_CLAIMED_INPUT)
 733                 printk("input");
 734         if ((hid->claimed & HID_CLAIMED_INPUT) &&
 735                         ((hid->claimed & HID_CLAIMED_HIDDEV) ||
 736                                 hid->claimed & HID_CLAIMED_HIDRAW))
 737                 printk(",");
 738         if (hid->claimed & HID_CLAIMED_HIDDEV)
 739                 printk("hiddev%d", hid->minor);
 740         if ((hid->claimed & HID_CLAIMED_INPUT) &&
 741                         (hid->claimed & HID_CLAIMED_HIDDEV) &&
 742                         (hid->claimed & HID_CLAIMED_HIDRAW))
 743                 printk(",");
 744         if (hid->claimed & HID_CLAIMED_HIDRAW)
 745                 printk("hidraw%d", ((struct hidraw *)hid->hidraw)->minor);
 746
 747         type = "Device";
 748         for (i = 0; i < hid->maxcollection; i++) {
 749                 if (hid->collection[i].type == HID_COLLECTION_APPLICATION &&
 750                     (hid->collection[i].usage & HID_USAGE_PAGE) ==
 751                                                 HID_UP_GENDESK &&
 752                     (hid->collection[i].usage & 0xffff) <
 753                                                 ARRAY_SIZE(hid_types)) {
 754                         type = hid_types[hid->collection[i].usage & 0xffff];
 755                         break;
 756                 }
 757         }
 758
 759         usb_make_path(interface_to_usbdev(intf), path, 63);
 760
 761         printk(": USB HID v%x.%02x %s [%s] on %s\n",
 762                 hid->version >> 8, hid->version & 0xff, type, hid->name, path);
 763
 764         return 0;
 765 }
 766
 767 static int usbhid_parse(struct hid_device *hid)
 768 {
 769         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
 770         struct usb_host_interface *interface = intf->cur_altsetting;
 771         struct usb_device *dev = interface_to_usbdev (intf);
 772         struct hid_descriptor *hdesc;
 773         u32 quirks = 0;
 774         unsigned int rsize = 0;
 775         char *rdesc;
 776         int ret, n;
 777
 778         quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
 779                         le16_to_cpu(dev->descriptor.idProduct));
 780
 781         /* Many keyboards and mice don't like to be polled for reports,
 782          * so we will always set the HID_QUIRK_NOGET flag for them. */
 783         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
 784                 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
 785                         interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
 786                                 quirks |= HID_QUIRK_NOGET;
 787         }
 788
 789         if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
 790             (!interface->desc.bNumEndpoints ||
 791              usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
 792                 dbg_hid("class descriptor not present\n");
 793                 return -ENODEV;
 794         }
 795
 796         hid->version = le16_to_cpu(hdesc->bcdHID);
 797         hid->country = hdesc->bCountryCode;
 798
 799         for (n = 0; n < hdesc->bNumDescriptors; n++)
 800                 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
 801                         rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
 802
 803         if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
 804                 dbg_hid("weird size of report descriptor (%u)\n", rsize);
 805                 return -EINVAL;
 806         }
 807
 808         if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
 809                 dbg_hid("couldn't allocate rdesc memory\n");
 810                 return -ENOMEM;
 811         }
 812
 813         hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
 814
 815         ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
 816                         HID_DT_REPORT, rdesc, rsize);
 817         if (ret < 0) {
 818                 dbg_hid("reading report descriptor failed\n");
 819                 kfree(rdesc);
 820                 goto err;
 821         }
 822
 823         dbg_hid("report descriptor (size %u, read %d) = ", rsize, n);
 824         for (n = 0; n < rsize; n++)
 825                 dbg_hid_line(" %02x", (unsigned char) rdesc[n]);
 826         dbg_hid_line("\n");
 827
 828         ret = hid_parse_report(hid, rdesc, rsize);
 829         kfree(rdesc);
 830         if (ret) {
 831                 dbg_hid("parsing report descriptor failed\n");
 832                 goto err;
 833         }
 834
 835         hid->quirks = quirks;
 836
 837         return 0;
 838 err:
 839         return ret;
 840 }
 841
 842 static int usbhid_start(struct hid_device *hid)
 843 {
 844         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
 845         struct usb_host_interface *interface = intf->cur_altsetting;
 846         struct usb_device *dev = interface_to_usbdev(intf);
 847         struct usbhid_device *usbhid;
 848         unsigned int n, insize = 0;
 849         int ret;
 850
 851         WARN_ON(hid->driver_data);
 852
 853         usbhid = kzalloc(sizeof(struct usbhid_device), GFP_KERNEL);
 854         if (usbhid == NULL) {
 855                 ret = -ENOMEM;
 856                 goto err;
 857         }
 858
 859         hid->driver_data = usbhid;
 860         usbhid->hid = hid;
 861
 862         usbhid->bufsize = HID_MIN_BUFFER_SIZE;
 863         hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
 864         hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
 865         hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
 866
 867         if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
 868                 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
 869
 870         hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
 871
 872         if (insize > HID_MAX_BUFFER_SIZE)
 873                 insize = HID_MAX_BUFFER_SIZE;
 874
 875         if (hid_alloc_buffers(dev, hid)) {
 876                 ret = -ENOMEM;
 877                 goto fail;
 878         }
 879
 880         for (n = 0; n < interface->desc.bNumEndpoints; n++) {
 881                 struct usb_endpoint_descriptor *endpoint;
 882                 int pipe;
 883                 int interval;
 884
 885                 endpoint = &interface->endpoint[n].desc;
 886                 if ((endpoint->bmAttributes & 3) != 3)          /* Not an interrupt endpoint */
 887                         continue;
 888
 889                 interval = endpoint->bInterval;
 890
 891                 /* Some vendors give fullspeed interval on highspeed devides */
 892                 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
 893                     dev->speed == USB_SPEED_HIGH) {
 894                         interval = fls(endpoint->bInterval*8);
 895                         printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
 896                                hid->name, endpoint->bInterval, interval);
 897                 }
 898
 899                 /* Change the polling interval of mice. */
 900                 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
 901                         interval = hid_mousepoll_interval;
 902
 903                 ret = -ENOMEM;
 904                 if (usb_endpoint_dir_in(endpoint)) {
 905                         if (usbhid->urbin)
 906                                 continue;
 907                         if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
 908                                 goto fail;
 909                         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 910                         usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
 911                                          hid_irq_in, hid, interval);
 912                         usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
 913                         usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 914                 } else {
 915                         if (usbhid->urbout)
 916                                 continue;
 917                         if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
 918                                 goto fail;
 919                         pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
 920                         usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
 921                                          hid_irq_out, hid, interval);
 922                         usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
 923                         usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 924                 }
 925         }
 926
 927         if (!usbhid->urbin) {
 928                 err_hid("couldn't find an input interrupt endpoint");
 929                 ret = -ENODEV;
 930                 goto fail;
 931         }
 932
 933         init_waitqueue_head(&usbhid->wait);
 934         INIT_WORK(&usbhid->reset_work, hid_reset);
 935         setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
 936
 937         spin_lock_init(&usbhid->inlock);
 938         spin_lock_init(&usbhid->outlock);
 939         spin_lock_init(&usbhid->ctrllock);
 940
 941         usbhid->intf = intf;
 942         usbhid->ifnum = interface->desc.bInterfaceNumber;
 943
 944         usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
 945         if (!usbhid->urbctrl) {
 946                 ret = -ENOMEM;
 947                 goto fail;
 948         }
 949
 950         usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
 951                              usbhid->ctrlbuf, 1, hid_ctrl, hid);
 952         usbhid->urbctrl->setup_dma = usbhid->cr_dma;
 953         usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
 954         usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
 955
 956         ret = usbhid_start_finish(hid);
 957         if (ret)
 958                 goto fail;
 959
 960         return 0;
 961
 962 fail:
 963         usb_free_urb(usbhid->urbin);
 964         usb_free_urb(usbhid->urbout);
 965         usb_free_urb(usbhid->urbctrl);
 966         hid_free_buffers(dev, hid);
 967         kfree(usbhid);
 968 err:
 969         return ret;
 970 }
 971
 972 static void usbhid_stop(struct hid_device *hid)
 973 {
 974         struct usbhid_device *usbhid = hid->driver_data;
 975
 976         if (WARN_ON(!usbhid))
 977                 return;
 978
 979         spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
 980         set_bit(HID_DISCONNECTED, &usbhid->iofl);
 981         spin_unlock_irq(&usbhid->inlock);
 982         usb_kill_urb(usbhid->urbin);
 983         usb_kill_urb(usbhid->urbout);
 984         usb_kill_urb(usbhid->urbctrl);
 985
 986         del_timer_sync(&usbhid->io_retry);
 987         cancel_work_sync(&usbhid->reset_work);
 988
 989         if (hid->claimed & HID_CLAIMED_INPUT)
 990                 hidinput_disconnect(hid);
 991         if (hid->claimed & HID_CLAIMED_HIDDEV)
 992                 hiddev_disconnect(hid);
 993         if (hid->claimed & HID_CLAIMED_HIDRAW)
 994                 hidraw_disconnect(hid);
 995
 996         hid->claimed = 0;
 997
 998         usb_free_urb(usbhid->urbin);
 999         usb_free_urb(usbhid->urbctrl);
1000         usb_free_urb(usbhid->urbout);
1001
1002         hid_free_buffers(hid_to_usb_dev(hid), hid);
1003         kfree(usbhid);
1004         hid->driver_data = NULL;
1005 }
1006
1007 static struct hid_ll_driver usb_hid_driver = {
1008         .parse = usbhid_parse,
1009         .start = usbhid_start,
1010         .stop = usbhid_stop,
1011         .open = usbhid_open,
1012         .close = usbhid_close,
1013         .hidinput_input_event = usb_hidinput_input_event,
1014 };
1015
1016 static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1017 {
1018         struct usb_device *dev = interface_to_usbdev(intf);
1019         struct hid_device *hid;
1020         size_t len;
1021         int ret;
1022
1023         dbg_hid("HID probe called for ifnum %d\n",
1024                         intf->altsetting->desc.bInterfaceNumber);
1025
1026         hid = hid_allocate_device();
1027         if (IS_ERR(hid))
1028                 return PTR_ERR(hid);
1029
1030         usb_set_intfdata(intf, hid);
1031         hid->ll_driver = &usb_hid_driver;
1032         hid->hid_output_raw_report = usbhid_output_raw_report;
1033 #ifdef CONFIG_USB_HIDDEV
1034         hid->hiddev_hid_event = hiddev_hid_event;
1035         hid->hiddev_report_event = hiddev_report_event;
1036 #endif
1037         hid->dev.parent = &intf->dev;
1038         hid->bus = BUS_USB;
1039         hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1040         hid->product = le16_to_cpu(dev->descriptor.idProduct);
1041         hid->name[0] = 0;
1042
1043         if (dev->manufacturer)
1044                 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1045
1046         if (dev->product) {
1047                 if (dev->manufacturer)
1048                         strlcat(hid->name, " ", sizeof(hid->name));
1049                 strlcat(hid->name, dev->product, sizeof(hid->name));
1050         }
1051
1052         if (!strlen(hid->name))
1053                 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1054                          le16_to_cpu(dev->descriptor.idVendor),
1055                          le16_to_cpu(dev->descriptor.idProduct));
1056
1057         usb_make_path(dev, hid->phys, sizeof(hid->phys));
1058         strlcat(hid->phys, "/input", sizeof(hid->phys));
1059         len = strlen(hid->phys);
1060         if (len < sizeof(hid->phys) - 1)
1061                 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1062                          "%d", intf->altsetting[0].desc.bInterfaceNumber);
1063
1064         if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1065                 hid->uniq[0] = 0;
1066
1067         ret = hid_add_device(hid);
1068         if (ret) {
1069                 if (ret != -ENODEV)
1070                         dev_err(&intf->dev, "can't add hid device: %d\n", ret);
1071                 goto err;
1072         }
1073
1074         return 0;
1075 err:
1076         hid_destroy_device(hid);
1077         return ret;
1078 }
1079
1080 static void hid_disconnect(struct usb_interface *intf)
1081 {
1082         struct hid_device *hid = usb_get_intfdata(intf);
1083
1084         if (WARN_ON(!hid))
1085                 return;
1086
1087         hid_destroy_device(hid);
1088 }
1089
1090 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1091 {
1092         struct hid_device *hid = usb_get_intfdata (intf);
1093         struct usbhid_device *usbhid = hid->driver_data;
1094
1095         spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
1096         set_bit(HID_SUSPENDED, &usbhid->iofl);
1097         spin_unlock_irq(&usbhid->inlock);
1098         del_timer(&usbhid->io_retry);
1099         usb_kill_urb(usbhid->urbin);
1100         dev_dbg(&intf->dev, "suspend\n");
1101         return 0;
1102 }
1103
1104 static int hid_resume(struct usb_interface *intf)
1105 {
1106         struct hid_device *hid = usb_get_intfdata (intf);
1107         struct usbhid_device *usbhid = hid->driver_data;
1108         int status;
1109
1110         clear_bit(HID_SUSPENDED, &usbhid->iofl);
1111         usbhid->retry_delay = 0;
1112         status = hid_start_in(hid);
1113         dev_dbg(&intf->dev, "resume status %d\n", status);
1114         return status;
1115 }
1116
1117 /* Treat USB reset pretty much the same as suspend/resume */
1118 static int hid_pre_reset(struct usb_interface *intf)
1119 {
1120         /* FIXME: What if the interface is already suspended? */
1121         hid_suspend(intf, PMSG_ON);
1122         return 0;
1123 }
1124
1125 /* Same routine used for post_reset and reset_resume */
1126 static int hid_post_reset(struct usb_interface *intf)
1127 {
1128         struct usb_device *dev = interface_to_usbdev (intf);
1129
1130         hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1131         /* FIXME: Any more reinitialization needed? */
1132
1133         return hid_resume(intf);
1134 }
1135
1136 static struct usb_device_id hid_usb_ids [] = {
1137         { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1138                 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1139         { }                                             /* Terminating entry */
1140 };
1141
1142 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1143
1144 static struct usb_driver hid_driver = {
1145         .name =         "usbhid",
1146         .probe =        hid_probe,
1147         .disconnect =   hid_disconnect,
1148         .suspend =      hid_suspend,
1149         .resume =       hid_resume,
1150         .reset_resume = hid_post_reset,
1151         .pre_reset =    hid_pre_reset,
1152         .post_reset =   hid_post_reset,
1153         .id_table =     hid_usb_ids,
1154         .supports_autosuspend = 1,
1155 };
1156
1157 static const struct hid_device_id hid_usb_table[] = {
1158         { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1159         { }
1160 };
1161
1162 static struct hid_driver hid_usb_driver = {
1163         .name = "generic-usb",
1164         .id_table = hid_usb_table,
1165 };
1166
1167 static int __init hid_init(void)
1168 {
1169         int retval;
1170         retval = hid_register_driver(&hid_usb_driver);
1171         if (retval)
1172                 goto hid_register_fail;
1173         retval = usbhid_quirks_init(quirks_param);
1174         if (retval)
1175                 goto usbhid_quirks_init_fail;
1176         retval = hiddev_init();
1177         if (retval)
1178                 goto hiddev_init_fail;
1179         retval = usb_register(&hid_driver);
1180         if (retval)
1181                 goto usb_register_fail;
1182         info(DRIVER_VERSION ":" DRIVER_DESC);
1183
1184         return 0;
1185 usb_register_fail:
1186         hiddev_exit();
1187 hiddev_init_fail:
1188         usbhid_quirks_exit();
1189 usbhid_quirks_init_fail:
1190         hid_unregister_driver(&hid_usb_driver);
1191 hid_register_fail:
1192         return retval;
1193 }
1194
1195 static void __exit hid_exit(void)
1196 {
1197         usb_deregister(&hid_driver);
1198         hiddev_exit();
1199         usbhid_quirks_exit();
1200         hid_unregister_driver(&hid_usb_driver);
1201 }
1202
1203 module_init(hid_init);
1204 module_exit(hid_exit);
1205
1206 MODULE_AUTHOR(DRIVER_AUTHOR);
1207 MODULE_DESCRIPTION(DRIVER_DESC);
1208 MODULE_LICENSE(DRIVER_LICENSE);