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/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;
 645                 if (type == HID_INPUT_REPORT && hid->report_enum[type].numbered)
 646                         size++;
 647                 if (*max < size)
 648                         *max = size;
 649         }
 650 }
 651
 652 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
 653 {
 654         struct usbhid_device *usbhid = hid->driver_data;
 655
 656         if (!(usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->inbuf_dma)))
 657                 return -1;
 658         if (!(usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->outbuf_dma)))
 659                 return -1;
 660         if (!(usbhid->cr = usb_buffer_alloc(dev, sizeof(*(usbhid->cr)), GFP_ATOMIC, &usbhid->cr_dma)))
 661                 return -1;
 662         if (!(usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->ctrlbuf_dma)))
 663                 return -1;
 664
 665         return 0;
 666 }
 667
 668 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
 669 {
 670         struct usbhid_device *usbhid = hid->driver_data;
 671         struct usb_device *dev = hid_to_usb_dev(hid);
 672         struct usb_interface *intf = usbhid->intf;
 673         struct usb_host_interface *interface = intf->cur_altsetting;
 674         int ret;
 675
 676         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 677                 HID_REQ_SET_REPORT,
 678                 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 679                 ((HID_OUTPUT_REPORT + 1) << 8) | *buf,
 680                 interface->desc.bInterfaceNumber, buf + 1, count - 1,
 681                 USB_CTRL_SET_TIMEOUT);
 682
 683         /* count also the report id */
 684         if (ret > 0)
 685                 ret++;
 686
 687         return ret;
 688 }
 689
 690 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
 691 {
 692         struct usbhid_device *usbhid = hid->driver_data;
 693
 694         usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
 695         usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
 696         usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
 697         usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
 698 }
 699
 700 static int usbhid_parse(struct hid_device *hid)
 701 {
 702         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
 703         struct usb_host_interface *interface = intf->cur_altsetting;
 704         struct usb_device *dev = interface_to_usbdev (intf);
 705         struct hid_descriptor *hdesc;
 706         u32 quirks = 0;
 707         unsigned int rsize = 0;
 708         char *rdesc;
 709         int ret, n;
 710
 711         quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
 712                         le16_to_cpu(dev->descriptor.idProduct));
 713
 714         /* Many keyboards and mice don't like to be polled for reports,
 715          * so we will always set the HID_QUIRK_NOGET flag for them. */
 716         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
 717                 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
 718                         interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
 719                                 quirks |= HID_QUIRK_NOGET;
 720         }
 721
 722         if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
 723             (!interface->desc.bNumEndpoints ||
 724              usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
 725                 dbg_hid("class descriptor not present\n");
 726                 return -ENODEV;
 727         }
 728
 729         hid->version = le16_to_cpu(hdesc->bcdHID);
 730         hid->country = hdesc->bCountryCode;
 731
 732         for (n = 0; n < hdesc->bNumDescriptors; n++)
 733                 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
 734                         rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
 735
 736         if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
 737                 dbg_hid("weird size of report descriptor (%u)\n", rsize);
 738                 return -EINVAL;
 739         }
 740
 741         if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
 742                 dbg_hid("couldn't allocate rdesc memory\n");
 743                 return -ENOMEM;
 744         }
 745
 746         hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
 747
 748         ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
 749                         HID_DT_REPORT, rdesc, rsize);
 750         if (ret < 0) {
 751                 dbg_hid("reading report descriptor failed\n");
 752                 kfree(rdesc);
 753                 goto err;
 754         }
 755
 756         dbg_hid("report descriptor (size %u, read %d) = ", rsize, n);
 757         for (n = 0; n < rsize; n++)
 758                 dbg_hid_line(" %02x", (unsigned char) rdesc[n]);
 759         dbg_hid_line("\n");
 760
 761         ret = hid_parse_report(hid, rdesc, rsize);
 762         kfree(rdesc);
 763         if (ret) {
 764                 dbg_hid("parsing report descriptor failed\n");
 765                 goto err;
 766         }
 767
 768         hid->quirks = quirks;
 769
 770         return 0;
 771 err:
 772         return ret;
 773 }
 774
 775 static int usbhid_start(struct hid_device *hid)
 776 {
 777         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
 778         struct usb_host_interface *interface = intf->cur_altsetting;
 779         struct usb_device *dev = interface_to_usbdev(intf);
 780         struct usbhid_device *usbhid = hid->driver_data;
 781         unsigned int n, insize = 0;
 782         int ret;
 783
 784         clear_bit(HID_DISCONNECTED, &usbhid->iofl);
 785
 786         usbhid->bufsize = HID_MIN_BUFFER_SIZE;
 787         hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
 788         hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
 789         hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
 790
 791         if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
 792                 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
 793
 794         hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
 795
 796         if (insize > HID_MAX_BUFFER_SIZE)
 797                 insize = HID_MAX_BUFFER_SIZE;
 798
 799         if (hid_alloc_buffers(dev, hid)) {
 800                 ret = -ENOMEM;
 801                 goto fail;
 802         }
 803
 804         for (n = 0; n < interface->desc.bNumEndpoints; n++) {
 805                 struct usb_endpoint_descriptor *endpoint;
 806                 int pipe;
 807                 int interval;
 808
 809                 endpoint = &interface->endpoint[n].desc;
 810                 if ((endpoint->bmAttributes & 3) != 3)          /* Not an interrupt endpoint */
 811                         continue;
 812
 813                 interval = endpoint->bInterval;
 814
 815                 /* Some vendors give fullspeed interval on highspeed devides */
 816                 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
 817                     dev->speed == USB_SPEED_HIGH) {
 818                         interval = fls(endpoint->bInterval*8);
 819                         printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
 820                                hid->name, endpoint->bInterval, interval);
 821                 }
 822
 823                 /* Change the polling interval of mice. */
 824                 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
 825                         interval = hid_mousepoll_interval;
 826
 827                 ret = -ENOMEM;
 828                 if (usb_endpoint_dir_in(endpoint)) {
 829                         if (usbhid->urbin)
 830                                 continue;
 831                         if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
 832                                 goto fail;
 833                         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 834                         usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
 835                                          hid_irq_in, hid, interval);
 836                         usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
 837                         usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 838                 } else {
 839                         if (usbhid->urbout)
 840                                 continue;
 841                         if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
 842                                 goto fail;
 843                         pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
 844                         usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
 845                                          hid_irq_out, hid, interval);
 846                         usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
 847                         usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 848                 }
 849         }
 850
 851         init_waitqueue_head(&usbhid->wait);
 852         INIT_WORK(&usbhid->reset_work, hid_reset);
 853         setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
 854
 855         spin_lock_init(&usbhid->inlock);
 856         spin_lock_init(&usbhid->outlock);
 857         spin_lock_init(&usbhid->ctrllock);
 858
 859         usbhid->intf = intf;
 860         usbhid->ifnum = interface->desc.bInterfaceNumber;
 861
 862         usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
 863         if (!usbhid->urbctrl) {
 864                 ret = -ENOMEM;
 865                 goto fail;
 866         }
 867
 868         usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
 869                              usbhid->ctrlbuf, 1, hid_ctrl, hid);
 870         usbhid->urbctrl->setup_dma = usbhid->cr_dma;
 871         usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
 872         usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
 873
 874         usbhid_init_reports(hid);
 875         hid_dump_device(hid);
 876
 877         set_bit(HID_STARTED, &usbhid->iofl);
 878
 879         return 0;
 880
 881 fail:
 882         usb_free_urb(usbhid->urbin);
 883         usb_free_urb(usbhid->urbout);
 884         usb_free_urb(usbhid->urbctrl);
 885         usbhid->urbin = NULL;
 886         usbhid->urbout = NULL;
 887         usbhid->urbctrl = NULL;
 888         hid_free_buffers(dev, hid);
 889         return ret;
 890 }
 891
 892 static void usbhid_stop(struct hid_device *hid)
 893 {
 894         struct usbhid_device *usbhid = hid->driver_data;
 895
 896         if (WARN_ON(!usbhid))
 897                 return;
 898
 899         clear_bit(HID_STARTED, &usbhid->iofl);
 900         spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
 901         set_bit(HID_DISCONNECTED, &usbhid->iofl);
 902         spin_unlock_irq(&usbhid->inlock);
 903         usb_kill_urb(usbhid->urbin);
 904         usb_kill_urb(usbhid->urbout);
 905         usb_kill_urb(usbhid->urbctrl);
 906
 907         del_timer_sync(&usbhid->io_retry);
 908         cancel_work_sync(&usbhid->reset_work);
 909
 910         if (hid->claimed & HID_CLAIMED_INPUT)
 911                 hidinput_disconnect(hid);
 912         if (hid->claimed & HID_CLAIMED_HIDDEV)
 913                 hiddev_disconnect(hid);
 914         if (hid->claimed & HID_CLAIMED_HIDRAW)
 915                 hidraw_disconnect(hid);
 916
 917         hid->claimed = 0;
 918
 919         usb_free_urb(usbhid->urbin);
 920         usb_free_urb(usbhid->urbctrl);
 921         usb_free_urb(usbhid->urbout);
 922         usbhid->urbin = NULL; /* don't mess up next start */
 923         usbhid->urbctrl = NULL;
 924         usbhid->urbout = NULL;
 925
 926         hid_free_buffers(hid_to_usb_dev(hid), hid);
 927 }
 928
 929 static struct hid_ll_driver usb_hid_driver = {
 930         .parse = usbhid_parse,
 931         .start = usbhid_start,
 932         .stop = usbhid_stop,
 933         .open = usbhid_open,
 934         .close = usbhid_close,
 935         .hidinput_input_event = usb_hidinput_input_event,
 936 };
 937
 938 static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
 939 {
 940         struct usb_host_interface *interface = intf->cur_altsetting;
 941         struct usb_device *dev = interface_to_usbdev(intf);
 942         struct usbhid_device *usbhid;
 943         struct hid_device *hid;
 944         unsigned int n, has_in = 0;
 945         size_t len;
 946         int ret;
 947
 948         dbg_hid("HID probe called for ifnum %d\n",
 949                         intf->altsetting->desc.bInterfaceNumber);
 950
 951         for (n = 0; n < interface->desc.bNumEndpoints; n++)
 952                 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
 953                         has_in++;
 954         if (!has_in) {
 955                 dev_err(&intf->dev, "couldn't find an input interrupt "
 956                                 "endpoint\n");
 957                 return -ENODEV;
 958         }
 959
 960         hid = hid_allocate_device();
 961         if (IS_ERR(hid))
 962                 return PTR_ERR(hid);
 963
 964         usb_set_intfdata(intf, hid);
 965         hid->ll_driver = &usb_hid_driver;
 966         hid->hid_output_raw_report = usbhid_output_raw_report;
 967         hid->ff_init = hid_pidff_init;
 968 #ifdef CONFIG_USB_HIDDEV
 969         hid->hiddev_connect = hiddev_connect;
 970         hid->hiddev_hid_event = hiddev_hid_event;
 971         hid->hiddev_report_event = hiddev_report_event;
 972 #endif
 973         hid->dev.parent = &intf->dev;
 974         hid->bus = BUS_USB;
 975         hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
 976         hid->product = le16_to_cpu(dev->descriptor.idProduct);
 977         hid->name[0] = 0;
 978         if (intf->cur_altsetting->desc.bInterfaceProtocol ==
 979                         USB_INTERFACE_PROTOCOL_MOUSE)
 980                 hid->type = HID_TYPE_USBMOUSE;
 981
 982         if (dev->manufacturer)
 983                 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
 984
 985         if (dev->product) {
 986                 if (dev->manufacturer)
 987                         strlcat(hid->name, " ", sizeof(hid->name));
 988                 strlcat(hid->name, dev->product, sizeof(hid->name));
 989         }
 990
 991         if (!strlen(hid->name))
 992                 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
 993                          le16_to_cpu(dev->descriptor.idVendor),
 994                          le16_to_cpu(dev->descriptor.idProduct));
 995
 996         usb_make_path(dev, hid->phys, sizeof(hid->phys));
 997         strlcat(hid->phys, "/input", sizeof(hid->phys));
 998         len = strlen(hid->phys);
 999         if (len < sizeof(hid->phys) - 1)
1000                 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1001                          "%d", intf->altsetting[0].desc.bInterfaceNumber);
1002
1003         if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1004                 hid->uniq[0] = 0;
1005
1006         usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1007         if (usbhid == NULL) {
1008                 ret = -ENOMEM;
1009                 goto err;
1010         }
1011
1012         hid->driver_data = usbhid;
1013         usbhid->hid = hid;
1014
1015         ret = hid_add_device(hid);
1016         if (ret) {
1017                 if (ret != -ENODEV)
1018                         dev_err(&intf->dev, "can't add hid device: %d\n", ret);
1019                 goto err_free;
1020         }
1021
1022         return 0;
1023 err_free:
1024         kfree(usbhid);
1025 err:
1026         hid_destroy_device(hid);
1027         return ret;
1028 }
1029
1030 static void hid_disconnect(struct usb_interface *intf)
1031 {
1032         struct hid_device *hid = usb_get_intfdata(intf);
1033         struct usbhid_device *usbhid;
1034
1035         if (WARN_ON(!hid))
1036                 return;
1037
1038         usbhid = hid->driver_data;
1039         hid_destroy_device(hid);
1040         kfree(usbhid);
1041 }
1042
1043 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1044 {
1045         struct hid_device *hid = usb_get_intfdata (intf);
1046         struct usbhid_device *usbhid = hid->driver_data;
1047
1048         if (!test_bit(HID_STARTED, &usbhid->iofl))
1049                 return 0;
1050
1051         spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
1052         set_bit(HID_SUSPENDED, &usbhid->iofl);
1053         spin_unlock_irq(&usbhid->inlock);
1054         del_timer_sync(&usbhid->io_retry);
1055         usb_kill_urb(usbhid->urbin);
1056         dev_dbg(&intf->dev, "suspend\n");
1057         return 0;
1058 }
1059
1060 static int hid_resume(struct usb_interface *intf)
1061 {
1062         struct hid_device *hid = usb_get_intfdata (intf);
1063         struct usbhid_device *usbhid = hid->driver_data;
1064         int status;
1065
1066         if (!test_bit(HID_STARTED, &usbhid->iofl))
1067                 return 0;
1068
1069         clear_bit(HID_SUSPENDED, &usbhid->iofl);
1070         usbhid->retry_delay = 0;
1071         status = hid_start_in(hid);
1072         dev_dbg(&intf->dev, "resume status %d\n", status);
1073         return status;
1074 }
1075
1076 /* Treat USB reset pretty much the same as suspend/resume */
1077 static int hid_pre_reset(struct usb_interface *intf)
1078 {
1079         /* FIXME: What if the interface is already suspended? */
1080         hid_suspend(intf, PMSG_ON);
1081         return 0;
1082 }
1083
1084 /* Same routine used for post_reset and reset_resume */
1085 static int hid_post_reset(struct usb_interface *intf)
1086 {
1087         struct usb_device *dev = interface_to_usbdev (intf);
1088
1089         hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1090         /* FIXME: Any more reinitialization needed? */
1091
1092         return hid_resume(intf);
1093 }
1094
1095 static struct usb_device_id hid_usb_ids [] = {
1096         { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1097                 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1098         { }                                             /* Terminating entry */
1099 };
1100
1101 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1102
1103 static struct usb_driver hid_driver = {
1104         .name =         "usbhid",
1105         .probe =        hid_probe,
1106         .disconnect =   hid_disconnect,
1107         .suspend =      hid_suspend,
1108         .resume =       hid_resume,
1109         .reset_resume = hid_post_reset,
1110         .pre_reset =    hid_pre_reset,
1111         .post_reset =   hid_post_reset,
1112         .id_table =     hid_usb_ids,
1113         .supports_autosuspend = 1,
1114 };
1115
1116 static const struct hid_device_id hid_usb_table[] = {
1117         { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1118         { }
1119 };
1120
1121 static struct hid_driver hid_usb_driver = {
1122         .name = "generic-usb",
1123         .id_table = hid_usb_table,
1124 };
1125
1126 static int __init hid_init(void)
1127 {
1128         int retval;
1129         retval = hid_register_driver(&hid_usb_driver);
1130         if (retval)
1131                 goto hid_register_fail;
1132         retval = usbhid_quirks_init(quirks_param);
1133         if (retval)
1134                 goto usbhid_quirks_init_fail;
1135         retval = hiddev_init();
1136         if (retval)
1137                 goto hiddev_init_fail;
1138         retval = usb_register(&hid_driver);
1139         if (retval)
1140                 goto usb_register_fail;
1141         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1142                         DRIVER_DESC "\n");
1143
1144         return 0;
1145 usb_register_fail:
1146         hiddev_exit();
1147 hiddev_init_fail:
1148         usbhid_quirks_exit();
1149 usbhid_quirks_init_fail:
1150         hid_unregister_driver(&hid_usb_driver);
1151 hid_register_fail:
1152         return retval;
1153 }
1154
1155 static void __exit hid_exit(void)
1156 {
1157         usb_deregister(&hid_driver);
1158         hiddev_exit();
1159         usbhid_quirks_exit();
1160         hid_unregister_driver(&hid_usb_driver);
1161 }
1162
1163 module_init(hid_init);
1164 module_exit(hid_exit);
1165
1166 MODULE_AUTHOR(DRIVER_AUTHOR);
1167 MODULE_DESCRIPTION(DRIVER_DESC);
1168 MODULE_LICENSE(DRIVER_LICENSE);