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) 2006-2008 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/mutex.h>
  24 #include <linux/smp_lock.h>
  25 #include <linux/spinlock.h>
  26 #include <asm/unaligned.h>
  27 #include <asm/byteorder.h>
  28 #include <linux/input.h>
  29 #include <linux/wait.h>
  30
  31 #include <linux/usb.h>
  32
  33 #include <linux/hid.h>
  34 #include <linux/hiddev.h>
  35 #include <linux/hid-debug.h>
  36 #include <linux/hidraw.h>
  37 #include "usbhid.h"
  38
  39 /*
  40  * Version Information
  41  */
  42
  43 #define DRIVER_VERSION "v2.6"
  44 #define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik, Jiri Kosina"
  45 #define DRIVER_DESC "USB HID core driver"
  46 #define DRIVER_LICENSE "GPL"
  47
  48 /*
  49  * Module parameters.
  50  */
  51
  52 static unsigned int hid_mousepoll_interval;
  53 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
  54 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
  55
  56 /* Quirks specified at module load time */
  57 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
  58 module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
  59 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
  60                 " quirks=vendorID:productID:quirks"
  61                 " where vendorID, productID, and quirks are all in"
  62                 " 0x-prefixed hex");
  63 /*
  64  * Input submission and I/O error handler.
  65  */
  66
  67 static void hid_io_error(struct hid_device *hid);
  68
  69 /* Start up the input URB */
  70 static int hid_start_in(struct hid_device *hid)
  71 {
  72         unsigned long flags;
  73         int rc = 0;
  74         struct usbhid_device *usbhid = hid->driver_data;
  75
  76         spin_lock_irqsave(&usbhid->inlock, flags);
  77         if (hid->open > 0 && !test_bit(HID_SUSPENDED, &usbhid->iofl) &&
  78                         !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
  79                         !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
  80                 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
  81                 if (rc != 0)
  82                         clear_bit(HID_IN_RUNNING, &usbhid->iofl);
  83         }
  84         spin_unlock_irqrestore(&usbhid->inlock, flags);
  85         return rc;
  86 }
  87
  88 /* I/O retry timer routine */
  89 static void hid_retry_timeout(unsigned long _hid)
  90 {
  91         struct hid_device *hid = (struct hid_device *) _hid;
  92         struct usbhid_device *usbhid = hid->driver_data;
  93
  94         dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
  95         if (hid_start_in(hid))
  96                 hid_io_error(hid);
  97 }
  98
  99 /* Workqueue routine to reset the device or clear a halt */
 100 static void hid_reset(struct work_struct *work)
 101 {
 102         struct usbhid_device *usbhid =
 103                 container_of(work, struct usbhid_device, reset_work);
 104         struct hid_device *hid = usbhid->hid;
 105         int rc_lock, rc = 0;
 106
 107         if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
 108                 dev_dbg(&usbhid->intf->dev, "clear halt\n");
 109                 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
 110                 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
 111                 hid_start_in(hid);
 112         }
 113
 114         else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
 115                 dev_dbg(&usbhid->intf->dev, "resetting device\n");
 116                 rc = rc_lock = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
 117                 if (rc_lock >= 0) {
 118                         rc = usb_reset_device(hid_to_usb_dev(hid));
 119                         if (rc_lock)
 120                                 usb_unlock_device(hid_to_usb_dev(hid));
 121                 }
 122                 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
 123         }
 124
 125         switch (rc) {
 126         case 0:
 127                 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
 128                         hid_io_error(hid);
 129                 break;
 130         default:
 131                 err_hid("can't reset device, %s-%s/input%d, status %d",
 132                                 hid_to_usb_dev(hid)->bus->bus_name,
 133                                 hid_to_usb_dev(hid)->devpath,
 134                                 usbhid->ifnum, rc);
 135                 /* FALLTHROUGH */
 136         case -EHOSTUNREACH:
 137         case -ENODEV:
 138         case -EINTR:
 139                 break;
 140         }
 141 }
 142
 143 /* Main I/O error handler */
 144 static void hid_io_error(struct hid_device *hid)
 145 {
 146         unsigned long flags;
 147         struct usbhid_device *usbhid = hid->driver_data;
 148
 149         spin_lock_irqsave(&usbhid->inlock, flags);
 150
 151         /* Stop when disconnected */
 152         if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
 153                 goto done;
 154
 155         /* If it has been a while since the last error, we'll assume
 156          * this a brand new error and reset the retry timeout. */
 157         if (time_after(jiffies, usbhid->stop_retry + HZ/2))
 158                 usbhid->retry_delay = 0;
 159
 160         /* When an error occurs, retry at increasing intervals */
 161         if (usbhid->retry_delay == 0) {
 162                 usbhid->retry_delay = 13;       /* Then 26, 52, 104, 104, ... */
 163                 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
 164         } else if (usbhid->retry_delay < 100)
 165                 usbhid->retry_delay *= 2;
 166
 167         if (time_after(jiffies, usbhid->stop_retry)) {
 168
 169                 /* Retries failed, so do a port reset */
 170                 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
 171                         schedule_work(&usbhid->reset_work);
 172                         goto done;
 173                 }
 174         }
 175
 176         mod_timer(&usbhid->io_retry,
 177                         jiffies + msecs_to_jiffies(usbhid->retry_delay));
 178 done:
 179         spin_unlock_irqrestore(&usbhid->inlock, flags);
 180 }
 181
 182 /*
 183  * Input interrupt completion handler.
 184  */
 185
 186 static void hid_irq_in(struct urb *urb)
 187 {
 188         struct hid_device       *hid = urb->context;
 189         struct usbhid_device    *usbhid = hid->driver_data;
 190         int                     status;
 191
 192         switch (urb->status) {
 193         case 0:                 /* success */
 194                 usbhid->retry_delay = 0;
 195                 hid_input_report(urb->context, HID_INPUT_REPORT,
 196                                  urb->transfer_buffer,
 197                                  urb->actual_length, 1);
 198                 break;
 199         case -EPIPE:            /* stall */
 200                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 201                 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
 202                 schedule_work(&usbhid->reset_work);
 203                 return;
 204         case -ECONNRESET:       /* unlink */
 205         case -ENOENT:
 206         case -ESHUTDOWN:        /* unplug */
 207                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 208                 return;
 209         case -EILSEQ:           /* protocol error or unplug */
 210         case -EPROTO:           /* protocol error or unplug */
 211         case -ETIME:            /* protocol error or unplug */
 212         case -ETIMEDOUT:        /* Should never happen, but... */
 213                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 214                 hid_io_error(hid);
 215                 return;
 216         default:                /* error */
 217                 dev_warn(&urb->dev->dev, "input irq status %d  "
 218                                 "received\n", 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         char *raw_report;
 238         struct usbhid_device *usbhid = hid->driver_data;
 239
 240         report = usbhid->out[usbhid->outtail].report;
 241         raw_report = usbhid->out[usbhid->outtail].raw_report;
 242
 243         usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 244         usbhid->urbout->dev = hid_to_usb_dev(hid);
 245         memcpy(usbhid->outbuf, raw_report, usbhid->urbout->transfer_buffer_length);
 246         kfree(raw_report);
 247
 248         dbg_hid("submitting out urb\n");
 249
 250         if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
 251                 err_hid("usb_submit_urb(out) failed");
 252                 return -1;
 253         }
 254
 255         return 0;
 256 }
 257
 258 static int hid_submit_ctrl(struct hid_device *hid)
 259 {
 260         struct hid_report *report;
 261         unsigned char dir;
 262         char *raw_report;
 263         int len;
 264         struct usbhid_device *usbhid = hid->driver_data;
 265
 266         report = usbhid->ctrl[usbhid->ctrltail].report;
 267         raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
 268         dir = usbhid->ctrl[usbhid->ctrltail].dir;
 269
 270         len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 271         if (dir == USB_DIR_OUT) {
 272                 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
 273                 usbhid->urbctrl->transfer_buffer_length = len;
 274                 memcpy(usbhid->ctrlbuf, raw_report, len);
 275                 kfree(raw_report);
 276         } else {
 277                 int maxpacket, padlen;
 278
 279                 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
 280                 maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
 281                 if (maxpacket > 0) {
 282                         padlen = DIV_ROUND_UP(len, maxpacket);
 283                         padlen *= maxpacket;
 284                         if (padlen > usbhid->bufsize)
 285                                 padlen = usbhid->bufsize;
 286                 } else
 287                         padlen = 0;
 288                 usbhid->urbctrl->transfer_buffer_length = padlen;
 289         }
 290         usbhid->urbctrl->dev = hid_to_usb_dev(hid);
 291
 292         usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
 293         usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
 294         usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
 295         usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
 296         usbhid->cr->wLength = cpu_to_le16(len);
 297
 298         dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
 299                 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
 300                 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
 301
 302         if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
 303                 err_hid("usb_submit_urb(ctrl) failed");
 304                 return -1;
 305         }
 306
 307         return 0;
 308 }
 309
 310 /*
 311  * Output interrupt completion handler.
 312  */
 313
 314 static void hid_irq_out(struct urb *urb)
 315 {
 316         struct hid_device *hid = urb->context;
 317         struct usbhid_device *usbhid = hid->driver_data;
 318         unsigned long flags;
 319         int unplug = 0;
 320
 321         switch (urb->status) {
 322         case 0:                 /* success */
 323                 break;
 324         case -ESHUTDOWN:        /* unplug */
 325                 unplug = 1;
 326         case -EILSEQ:           /* protocol error or unplug */
 327         case -EPROTO:           /* protocol error or unplug */
 328         case -ECONNRESET:       /* unlink */
 329         case -ENOENT:
 330                 break;
 331         default:                /* error */
 332                 dev_warn(&urb->dev->dev, "output irq status %d "
 333                                 "received\n", urb->status);
 334         }
 335
 336         spin_lock_irqsave(&usbhid->outlock, flags);
 337
 338         if (unplug)
 339                 usbhid->outtail = usbhid->outhead;
 340         else
 341                 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
 342
 343         if (usbhid->outhead != usbhid->outtail) {
 344                 if (hid_submit_out(hid)) {
 345                         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 346                         wake_up(&usbhid->wait);
 347                 }
 348                 spin_unlock_irqrestore(&usbhid->outlock, flags);
 349                 return;
 350         }
 351
 352         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 353         spin_unlock_irqrestore(&usbhid->outlock, flags);
 354         wake_up(&usbhid->wait);
 355 }
 356
 357 /*
 358  * Control pipe completion handler.
 359  */
 360
 361 static void hid_ctrl(struct urb *urb)
 362 {
 363         struct hid_device *hid = urb->context;
 364         struct usbhid_device *usbhid = hid->driver_data;
 365         unsigned long flags;
 366         int unplug = 0;
 367
 368         spin_lock_irqsave(&usbhid->ctrllock, flags);
 369
 370         switch (urb->status) {
 371         case 0:                 /* success */
 372                 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
 373                         hid_input_report(urb->context,
 374                                 usbhid->ctrl[usbhid->ctrltail].report->type,
 375                                 urb->transfer_buffer, urb->actual_length, 0);
 376                 break;
 377         case -ESHUTDOWN:        /* unplug */
 378                 unplug = 1;
 379         case -EILSEQ:           /* protocol error or unplug */
 380         case -EPROTO:           /* protocol error or unplug */
 381         case -ECONNRESET:       /* unlink */
 382         case -ENOENT:
 383         case -EPIPE:            /* report not available */
 384                 break;
 385         default:                /* error */
 386                 dev_warn(&urb->dev->dev, "ctrl urb status %d "
 387                                 "received\n", urb->status);
 388         }
 389
 390         if (unplug)
 391                 usbhid->ctrltail = usbhid->ctrlhead;
 392         else
 393                 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
 394
 395         if (usbhid->ctrlhead != usbhid->ctrltail) {
 396                 if (hid_submit_ctrl(hid)) {
 397                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 398                         wake_up(&usbhid->wait);
 399                 }
 400                 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
 401                 return;
 402         }
 403
 404         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 405         spin_unlock_irqrestore(&usbhid->ctrllock, flags);
 406         wake_up(&usbhid->wait);
 407 }
 408
 409 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
 410 {
 411         int head;
 412         unsigned long flags;
 413         struct usbhid_device *usbhid = hid->driver_data;
 414         int len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 415
 416         if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
 417                 return;
 418
 419         if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
 420
 421                 spin_lock_irqsave(&usbhid->outlock, flags);
 422
 423                 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
 424                         spin_unlock_irqrestore(&usbhid->outlock, flags);
 425                         dev_warn(&hid->dev, "output queue full\n");
 426                         return;
 427                 }
 428
 429                 usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC);
 430                 if (!usbhid->out[usbhid->outhead].raw_report) {
 431                         spin_unlock_irqrestore(&usbhid->outlock, flags);
 432                         dev_warn(&hid->dev, "output queueing failed\n");
 433                         return;
 434                 }
 435                 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
 436                 usbhid->out[usbhid->outhead].report = report;
 437                 usbhid->outhead = head;
 438
 439                 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl))
 440                         if (hid_submit_out(hid))
 441                                 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 442
 443                 spin_unlock_irqrestore(&usbhid->outlock, flags);
 444                 return;
 445         }
 446
 447         spin_lock_irqsave(&usbhid->ctrllock, flags);
 448
 449         if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
 450                 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
 451                 dev_warn(&hid->dev, "control queue full\n");
 452                 return;
 453         }
 454
 455         if (dir == USB_DIR_OUT) {
 456                 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC);
 457                 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
 458                         spin_unlock_irqrestore(&usbhid->ctrllock, flags);
 459                         dev_warn(&hid->dev, "control queueing failed\n");
 460                         return;
 461                 }
 462                 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
 463         }
 464         usbhid->ctrl[usbhid->ctrlhead].report = report;
 465         usbhid->ctrl[usbhid->ctrlhead].dir = dir;
 466         usbhid->ctrlhead = head;
 467
 468         if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
 469                 if (hid_submit_ctrl(hid))
 470                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 471
 472         spin_unlock_irqrestore(&usbhid->ctrllock, flags);
 473 }
 474 EXPORT_SYMBOL_GPL(usbhid_submit_report);
 475
 476 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
 477 {
 478         struct hid_device *hid = input_get_drvdata(dev);
 479         struct hid_field *field;
 480         int offset;
 481
 482         if (type == EV_FF)
 483                 return input_ff_event(dev, type, code, value);
 484
 485         if (type != EV_LED)
 486                 return -1;
 487
 488         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
 489                 dev_warn(&dev->dev, "event field not found\n");
 490                 return -1;
 491         }
 492
 493         hid_set_field(field, offset, value);
 494         usbhid_submit_report(hid, field->report, USB_DIR_OUT);
 495
 496         return 0;
 497 }
 498
 499 int usbhid_wait_io(struct hid_device *hid)
 500 {
 501         struct usbhid_device *usbhid = hid->driver_data;
 502
 503         if (!wait_event_timeout(usbhid->wait,
 504                                 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
 505                                 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
 506                                         10*HZ)) {
 507                 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
 508                 return -1;
 509         }
 510
 511         return 0;
 512 }
 513
 514 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
 515 {
 516         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 517                 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
 518                 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
 519 }
 520
 521 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
 522                 unsigned char type, void *buf, int size)
 523 {
 524         int result, retries = 4;
 525
 526         memset(buf, 0, size);
 527
 528         do {
 529                 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 530                                 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
 531                                 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
 532                 retries--;
 533         } while (result < size && retries);
 534         return result;
 535 }
 536
 537 int usbhid_open(struct hid_device *hid)
 538 {
 539         struct usbhid_device *usbhid = hid->driver_data;
 540         int res;
 541
 542         if (!hid->open++) {
 543                 res = usb_autopm_get_interface(usbhid->intf);
 544                 if (res < 0) {
 545                         hid->open--;
 546                         return -EIO;
 547                 }
 548         }
 549         if (hid_start_in(hid))
 550                 hid_io_error(hid);
 551         return 0;
 552 }
 553
 554 void usbhid_close(struct hid_device *hid)
 555 {
 556         struct usbhid_device *usbhid = hid->driver_data;
 557
 558         if (!--hid->open) {
 559                 usb_kill_urb(usbhid->urbin);
 560                 usb_autopm_put_interface(usbhid->intf);
 561         }
 562 }
 563
 564 /*
 565  * Initialize all reports
 566  */
 567
 568 void usbhid_init_reports(struct hid_device *hid)
 569 {
 570         struct hid_report *report;
 571         struct usbhid_device *usbhid = hid->driver_data;
 572         int err, ret;
 573
 574         list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
 575                 usbhid_submit_report(hid, report, USB_DIR_IN);
 576
 577         list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
 578                 usbhid_submit_report(hid, report, USB_DIR_IN);
 579
 580         err = 0;
 581         ret = usbhid_wait_io(hid);
 582         while (ret) {
 583                 err |= ret;
 584                 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
 585                         usb_kill_urb(usbhid->urbctrl);
 586                 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
 587                         usb_kill_urb(usbhid->urbout);
 588                 ret = usbhid_wait_io(hid);
 589         }
 590
 591         if (err)
 592                 dev_warn(&hid->dev, "timeout initializing reports\n");
 593 }
 594
 595 /*
 596  * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
 597  */
 598 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
 599     unsigned int hid_code, struct hid_field **pfield)
 600 {
 601         struct hid_report *report;
 602         struct hid_field *field;
 603         struct hid_usage *usage;
 604         int i, j;
 605
 606         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
 607                 for (i = 0; i < report->maxfield; i++) {
 608                         field = report->field[i];
 609                         for (j = 0; j < field->maxusage; j++) {
 610                                 usage = &field->usage[j];
 611                                 if ((usage->hid & HID_USAGE_PAGE) == page &&
 612                                     (usage->hid & 0xFFFF) == hid_code) {
 613                                         *pfield = field;
 614                                         return j;
 615                                 }
 616                         }
 617                 }
 618         }
 619         return -1;
 620 }
 621
 622 void usbhid_set_leds(struct hid_device *hid)
 623 {
 624         struct hid_field *field;
 625         int offset;
 626
 627         if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
 628                 hid_set_field(field, offset, 0);
 629                 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
 630         }
 631 }
 632 EXPORT_SYMBOL_GPL(usbhid_set_leds);
 633
 634 /*
 635  * Traverse the supplied list of reports and find the longest
 636  */
 637 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
 638                 unsigned int *max)
 639 {
 640         struct hid_report *report;
 641         unsigned int size;
 642
 643         list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
 644                 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
 645                 if (*max < size)
 646                         *max = size;
 647         }
 648 }
 649
 650 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
 651 {
 652         struct usbhid_device *usbhid = hid->driver_data;
 653
 654         if (!(usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->inbuf_dma)))
 655                 return -1;
 656         if (!(usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->outbuf_dma)))
 657                 return -1;
 658         if (!(usbhid->cr = usb_buffer_alloc(dev, sizeof(*(usbhid->cr)), GFP_ATOMIC, &usbhid->cr_dma)))
 659                 return -1;
 660         if (!(usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->ctrlbuf_dma)))
 661                 return -1;
 662
 663         return 0;
 664 }
 665
 666 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
 667 {
 668         struct usbhid_device *usbhid = hid->driver_data;
 669         struct usb_device *dev = hid_to_usb_dev(hid);
 670         struct usb_interface *intf = usbhid->intf;
 671         struct usb_host_interface *interface = intf->cur_altsetting;
 672         int ret;
 673
 674         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 675                 HID_REQ_SET_REPORT,
 676                 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 677                 ((HID_OUTPUT_REPORT + 1) << 8) | *buf,
 678                 interface->desc.bInterfaceNumber, buf + 1, count - 1,
 679                 USB_CTRL_SET_TIMEOUT);
 680
 681         /* count also the report id */
 682         if (ret > 0)
 683                 ret++;
 684
 685         return ret;
 686 }
 687
 688 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
 689 {
 690         struct usbhid_device *usbhid = hid->driver_data;
 691
 692         usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
 693         usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
 694         usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
 695         usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
 696 }
 697
 698 static int usbhid_parse(struct hid_device *hid)
 699 {
 700         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
 701         struct usb_host_interface *interface = intf->cur_altsetting;
 702         struct usb_device *dev = interface_to_usbdev (intf);
 703         struct hid_descriptor *hdesc;
 704         u32 quirks = 0;
 705         unsigned int rsize = 0;
 706         char *rdesc;
 707         int ret, n;
 708
 709         quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
 710                         le16_to_cpu(dev->descriptor.idProduct));
 711
 712         /* Many keyboards and mice don't like to be polled for reports,
 713          * so we will always set the HID_QUIRK_NOGET flag for them. */
 714         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
 715                 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
 716                         interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
 717                                 quirks |= HID_QUIRK_NOGET;
 718         }
 719
 720         if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
 721             (!interface->desc.bNumEndpoints ||
 722              usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
 723                 dbg_hid("class descriptor not present\n");
 724                 return -ENODEV;
 725         }
 726
 727         hid->version = le16_to_cpu(hdesc->bcdHID);
 728         hid->country = hdesc->bCountryCode;
 729
 730         for (n = 0; n < hdesc->bNumDescriptors; n++)
 731                 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
 732                         rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
 733
 734         if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
 735                 dbg_hid("weird size of report descriptor (%u)\n", rsize);
 736                 return -EINVAL;
 737         }
 738
 739         if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
 740                 dbg_hid("couldn't allocate rdesc memory\n");
 741                 return -ENOMEM;
 742         }
 743
 744         hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
 745
 746         ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
 747                         HID_DT_REPORT, rdesc, rsize);
 748         if (ret < 0) {
 749                 dbg_hid("reading report descriptor failed\n");
 750                 kfree(rdesc);
 751                 goto err;
 752         }
 753
 754         dbg_hid("report descriptor (size %u, read %d) = ", rsize, n);
 755         for (n = 0; n < rsize; n++)
 756                 dbg_hid_line(" %02x", (unsigned char) rdesc[n]);
 757         dbg_hid_line("\n");
 758
 759         ret = hid_parse_report(hid, rdesc, rsize);
 760         kfree(rdesc);
 761         if (ret) {
 762                 dbg_hid("parsing report descriptor failed\n");
 763                 goto err;
 764         }
 765
 766         hid->quirks = quirks;
 767
 768         return 0;
 769 err:
 770         return ret;
 771 }
 772
 773 static int usbhid_start(struct hid_device *hid)
 774 {
 775         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
 776         struct usb_host_interface *interface = intf->cur_altsetting;
 777         struct usb_device *dev = interface_to_usbdev(intf);
 778         struct usbhid_device *usbhid = hid->driver_data;
 779         unsigned int n, insize = 0;
 780         int ret;
 781
 782         clear_bit(HID_DISCONNECTED, &usbhid->iofl);
 783
 784         usbhid->bufsize = HID_MIN_BUFFER_SIZE;
 785         hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
 786         hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
 787         hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
 788
 789         if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
 790                 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
 791
 792         hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
 793
 794         if (insize > HID_MAX_BUFFER_SIZE)
 795                 insize = HID_MAX_BUFFER_SIZE;
 796
 797         if (hid_alloc_buffers(dev, hid)) {
 798                 ret = -ENOMEM;
 799                 goto fail;
 800         }
 801
 802         for (n = 0; n < interface->desc.bNumEndpoints; n++) {
 803                 struct usb_endpoint_descriptor *endpoint;
 804                 int pipe;
 805                 int interval;
 806
 807                 endpoint = &interface->endpoint[n].desc;
 808                 if ((endpoint->bmAttributes & 3) != 3)          /* Not an interrupt endpoint */
 809                         continue;
 810
 811                 interval = endpoint->bInterval;
 812
 813                 /* Some vendors give fullspeed interval on highspeed devides */
 814                 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
 815                     dev->speed == USB_SPEED_HIGH) {
 816                         interval = fls(endpoint->bInterval*8);
 817                         printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
 818                                hid->name, endpoint->bInterval, interval);
 819                 }
 820
 821                 /* Change the polling interval of mice. */
 822                 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
 823                         interval = hid_mousepoll_interval;
 824
 825                 ret = -ENOMEM;
 826                 if (usb_endpoint_dir_in(endpoint)) {
 827                         if (usbhid->urbin)
 828                                 continue;
 829                         if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
 830                                 goto fail;
 831                         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 832                         usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
 833                                          hid_irq_in, hid, interval);
 834                         usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
 835                         usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 836                 } else {
 837                         if (usbhid->urbout)
 838                                 continue;
 839                         if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
 840                                 goto fail;
 841                         pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
 842                         usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
 843                                          hid_irq_out, hid, interval);
 844                         usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
 845                         usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 846                 }
 847         }
 848
 849         init_waitqueue_head(&usbhid->wait);
 850         INIT_WORK(&usbhid->reset_work, hid_reset);
 851         setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
 852
 853         spin_lock_init(&usbhid->inlock);
 854         spin_lock_init(&usbhid->outlock);
 855         spin_lock_init(&usbhid->ctrllock);
 856
 857         usbhid->intf = intf;
 858         usbhid->ifnum = interface->desc.bInterfaceNumber;
 859
 860         usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
 861         if (!usbhid->urbctrl) {
 862                 ret = -ENOMEM;
 863                 goto fail;
 864         }
 865
 866         usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
 867                              usbhid->ctrlbuf, 1, hid_ctrl, hid);
 868         usbhid->urbctrl->setup_dma = usbhid->cr_dma;
 869         usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
 870         usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
 871
 872         usbhid_init_reports(hid);
 873         hid_dump_device(hid);
 874
 875         set_bit(HID_STARTED, &usbhid->iofl);
 876
 877         return 0;
 878
 879 fail:
 880         usb_free_urb(usbhid->urbin);
 881         usb_free_urb(usbhid->urbout);
 882         usb_free_urb(usbhid->urbctrl);
 883         usbhid->urbin = NULL;
 884         usbhid->urbout = NULL;
 885         usbhid->urbctrl = NULL;
 886         hid_free_buffers(dev, hid);
 887         return ret;
 888 }
 889
 890 static void usbhid_stop(struct hid_device *hid)
 891 {
 892         struct usbhid_device *usbhid = hid->driver_data;
 893
 894         if (WARN_ON(!usbhid))
 895                 return;
 896
 897         clear_bit(HID_STARTED, &usbhid->iofl);
 898         spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
 899         set_bit(HID_DISCONNECTED, &usbhid->iofl);
 900         spin_unlock_irq(&usbhid->inlock);
 901         usb_kill_urb(usbhid->urbin);
 902         usb_kill_urb(usbhid->urbout);
 903         usb_kill_urb(usbhid->urbctrl);
 904
 905         del_timer_sync(&usbhid->io_retry);
 906         cancel_work_sync(&usbhid->reset_work);
 907
 908         if (hid->claimed & HID_CLAIMED_INPUT)
 909                 hidinput_disconnect(hid);
 910         if (hid->claimed & HID_CLAIMED_HIDDEV)
 911                 hiddev_disconnect(hid);
 912         if (hid->claimed & HID_CLAIMED_HIDRAW)
 913                 hidraw_disconnect(hid);
 914
 915         hid->claimed = 0;
 916
 917         usb_free_urb(usbhid->urbin);
 918         usb_free_urb(usbhid->urbctrl);
 919         usb_free_urb(usbhid->urbout);
 920         usbhid->urbin = NULL; /* don't mess up next start */
 921         usbhid->urbctrl = NULL;
 922         usbhid->urbout = NULL;
 923
 924         hid_free_buffers(hid_to_usb_dev(hid), hid);
 925 }
 926
 927 static struct hid_ll_driver usb_hid_driver = {
 928         .parse = usbhid_parse,
 929         .start = usbhid_start,
 930         .stop = usbhid_stop,
 931         .open = usbhid_open,
 932         .close = usbhid_close,
 933         .hidinput_input_event = usb_hidinput_input_event,
 934 };
 935
 936 static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
 937 {
 938         struct usb_host_interface *interface = intf->cur_altsetting;
 939         struct usb_device *dev = interface_to_usbdev(intf);
 940         struct usbhid_device *usbhid;
 941         struct hid_device *hid;
 942         unsigned int n, has_in = 0;
 943         size_t len;
 944         int ret;
 945
 946         dbg_hid("HID probe called for ifnum %d\n",
 947                         intf->altsetting->desc.bInterfaceNumber);
 948
 949         for (n = 0; n < interface->desc.bNumEndpoints; n++)
 950                 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
 951                         has_in++;
 952         if (!has_in) {
 953                 dev_err(&intf->dev, "couldn't find an input interrupt "
 954                                 "endpoint\n");
 955                 return -ENODEV;
 956         }
 957
 958         hid = hid_allocate_device();
 959         if (IS_ERR(hid))
 960                 return PTR_ERR(hid);
 961
 962         usb_set_intfdata(intf, hid);
 963         hid->ll_driver = &usb_hid_driver;
 964         hid->hid_output_raw_report = usbhid_output_raw_report;
 965         hid->ff_init = hid_pidff_init;
 966 #ifdef CONFIG_USB_HIDDEV
 967         hid->hiddev_connect = hiddev_connect;
 968         hid->hiddev_hid_event = hiddev_hid_event;
 969         hid->hiddev_report_event = hiddev_report_event;
 970 #endif
 971         hid->dev.parent = &intf->dev;
 972         hid->bus = BUS_USB;
 973         hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
 974         hid->product = le16_to_cpu(dev->descriptor.idProduct);
 975         hid->name[0] = 0;
 976         if (intf->cur_altsetting->desc.bInterfaceProtocol ==
 977                         USB_INTERFACE_PROTOCOL_MOUSE)
 978                 hid->type = HID_TYPE_USBMOUSE;
 979
 980         if (dev->manufacturer)
 981                 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
 982
 983         if (dev->product) {
 984                 if (dev->manufacturer)
 985                         strlcat(hid->name, " ", sizeof(hid->name));
 986                 strlcat(hid->name, dev->product, sizeof(hid->name));
 987         }
 988
 989         if (!strlen(hid->name))
 990                 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
 991                          le16_to_cpu(dev->descriptor.idVendor),
 992                          le16_to_cpu(dev->descriptor.idProduct));
 993
 994         usb_make_path(dev, hid->phys, sizeof(hid->phys));
 995         strlcat(hid->phys, "/input", sizeof(hid->phys));
 996         len = strlen(hid->phys);
 997         if (len < sizeof(hid->phys) - 1)
 998                 snprintf(hid->phys + len, sizeof(hid->phys) - len,
 999                          "%d", intf->altsetting[0].desc.bInterfaceNumber);
1000
1001         if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1002                 hid->uniq[0] = 0;
1003
1004         usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1005         if (usbhid == NULL) {
1006                 ret = -ENOMEM;
1007                 goto err;
1008         }
1009
1010         hid->driver_data = usbhid;
1011         usbhid->hid = hid;
1012
1013         ret = hid_add_device(hid);
1014         if (ret) {
1015                 if (ret != -ENODEV)
1016                         dev_err(&intf->dev, "can't add hid device: %d\n", ret);
1017                 goto err_free;
1018         }
1019
1020         return 0;
1021 err_free:
1022         kfree(usbhid);
1023 err:
1024         hid_destroy_device(hid);
1025         return ret;
1026 }
1027
1028 static void hid_disconnect(struct usb_interface *intf)
1029 {
1030         struct hid_device *hid = usb_get_intfdata(intf);
1031         struct usbhid_device *usbhid;
1032
1033         if (WARN_ON(!hid))
1034                 return;
1035
1036         usbhid = hid->driver_data;
1037         hid_destroy_device(hid);
1038         kfree(usbhid);
1039 }
1040
1041 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1042 {
1043         struct hid_device *hid = usb_get_intfdata (intf);
1044         struct usbhid_device *usbhid = hid->driver_data;
1045
1046         if (!test_bit(HID_STARTED, &usbhid->iofl))
1047                 return 0;
1048
1049         spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
1050         set_bit(HID_SUSPENDED, &usbhid->iofl);
1051         spin_unlock_irq(&usbhid->inlock);
1052         del_timer_sync(&usbhid->io_retry);
1053         usb_kill_urb(usbhid->urbin);
1054         dev_dbg(&intf->dev, "suspend\n");
1055         return 0;
1056 }
1057
1058 static int hid_resume(struct usb_interface *intf)
1059 {
1060         struct hid_device *hid = usb_get_intfdata (intf);
1061         struct usbhid_device *usbhid = hid->driver_data;
1062         int status;
1063
1064         if (!test_bit(HID_STARTED, &usbhid->iofl))
1065                 return 0;
1066
1067         clear_bit(HID_SUSPENDED, &usbhid->iofl);
1068         usbhid->retry_delay = 0;
1069         status = hid_start_in(hid);
1070         dev_dbg(&intf->dev, "resume status %d\n", status);
1071         return status;
1072 }
1073
1074 /* Treat USB reset pretty much the same as suspend/resume */
1075 static int hid_pre_reset(struct usb_interface *intf)
1076 {
1077         /* FIXME: What if the interface is already suspended? */
1078         hid_suspend(intf, PMSG_ON);
1079         return 0;
1080 }
1081
1082 /* Same routine used for post_reset and reset_resume */
1083 static int hid_post_reset(struct usb_interface *intf)
1084 {
1085         struct usb_device *dev = interface_to_usbdev (intf);
1086
1087         hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1088         /* FIXME: Any more reinitialization needed? */
1089
1090         return hid_resume(intf);
1091 }
1092
1093 static struct usb_device_id hid_usb_ids [] = {
1094         { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1095                 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1096         { }                                             /* Terminating entry */
1097 };
1098
1099 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1100
1101 static struct usb_driver hid_driver = {
1102         .name =         "usbhid",
1103         .probe =        hid_probe,
1104         .disconnect =   hid_disconnect,
1105         .suspend =      hid_suspend,
1106         .resume =       hid_resume,
1107         .reset_resume = hid_post_reset,
1108         .pre_reset =    hid_pre_reset,
1109         .post_reset =   hid_post_reset,
1110         .id_table =     hid_usb_ids,
1111         .supports_autosuspend = 1,
1112 };
1113
1114 static const struct hid_device_id hid_usb_table[] = {
1115         { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1116         { }
1117 };
1118
1119 static struct hid_driver hid_usb_driver = {
1120         .name = "generic-usb",
1121         .id_table = hid_usb_table,
1122 };
1123
1124 static int __init hid_init(void)
1125 {
1126         int retval;
1127         retval = hid_register_driver(&hid_usb_driver);
1128         if (retval)
1129                 goto hid_register_fail;
1130         retval = usbhid_quirks_init(quirks_param);
1131         if (retval)
1132                 goto usbhid_quirks_init_fail;
1133         retval = hiddev_init();
1134         if (retval)
1135                 goto hiddev_init_fail;
1136         retval = usb_register(&hid_driver);
1137         if (retval)
1138                 goto usb_register_fail;
1139         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1140                         DRIVER_DESC "\n");
1141
1142         return 0;
1143 usb_register_fail:
1144         hiddev_exit();
1145 hiddev_init_fail:
1146         usbhid_quirks_exit();
1147 usbhid_quirks_init_fail:
1148         hid_unregister_driver(&hid_usb_driver);
1149 hid_register_fail:
1150         return retval;
1151 }
1152
1153 static void __exit hid_exit(void)
1154 {
1155         usb_deregister(&hid_driver);
1156         hiddev_exit();
1157         usbhid_quirks_exit();
1158         hid_unregister_driver(&hid_usb_driver);
1159 }
1160
1161 module_init(hid_init);
1162 module_exit(hid_exit);
1163
1164 MODULE_AUTHOR(DRIVER_AUTHOR);
1165 MODULE_DESCRIPTION(DRIVER_DESC);
1166 MODULE_LICENSE(DRIVER_LICENSE);