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  *  Copyright (c) 2007-2008 Oliver Neukum
   9  */
  10
  11 /*
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU General Public License as published by the Free
  14  * Software Foundation; either version 2 of the License, or (at your option)
  15  * any later version.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/slab.h>
  20 #include <linux/init.h>
  21 #include <linux/kernel.h>
  22 #include <linux/list.h>
  23 #include <linux/mm.h>
  24 #include <linux/mutex.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 #include <linux/workqueue.h>
  31
  32 #include <linux/usb.h>
  33
  34 #include <linux/hid.h>
  35 #include <linux/hiddev.h>
  36 #include <linux/hid-debug.h>
  37 #include <linux/hidraw.h>
  38 #include "usbhid.h"
  39
  40 /*
  41  * Version Information
  42  */
  43
  44 #define DRIVER_VERSION "v2.6"
  45 #define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik, Jiri Kosina"
  46 #define DRIVER_DESC "USB HID core driver"
  47 #define DRIVER_LICENSE "GPL"
  48
  49 /*
  50  * Module parameters.
  51  */
  52
  53 static unsigned int hid_mousepoll_interval;
  54 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
  55 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
  56
  57 static unsigned int ignoreled;
  58 module_param_named(ignoreled, ignoreled, uint, 0644);
  59 MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds");
  60
  61 /* Quirks specified at module load time */
  62 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
  63 module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
  64 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
  65                 " quirks=vendorID:productID:quirks"
  66                 " where vendorID, productID, and quirks are all in"
  67                 " 0x-prefixed hex");
  68 /*
  69  * Input submission and I/O error handler.
  70  */
  71 static DEFINE_MUTEX(hid_open_mut);
  72 static struct workqueue_struct *resumption_waker;
  73
  74 static void hid_io_error(struct hid_device *hid);
  75 static int hid_submit_out(struct hid_device *hid);
  76 static int hid_submit_ctrl(struct hid_device *hid);
  77 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid);
  78
  79 /* Start up the input URB */
  80 static int hid_start_in(struct hid_device *hid)
  81 {
  82         unsigned long flags;
  83         int rc = 0;
  84         struct usbhid_device *usbhid = hid->driver_data;
  85
  86         spin_lock_irqsave(&usbhid->lock, flags);
  87         if (hid->open > 0 &&
  88                         !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
  89                         !test_bit(HID_REPORTED_IDLE, &usbhid->iofl) &&
  90                         !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
  91                 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
  92                 if (rc != 0)
  93                         clear_bit(HID_IN_RUNNING, &usbhid->iofl);
  94         }
  95         spin_unlock_irqrestore(&usbhid->lock, flags);
  96         return rc;
  97 }
  98
  99 /* I/O retry timer routine */
 100 static void hid_retry_timeout(unsigned long _hid)
 101 {
 102         struct hid_device *hid = (struct hid_device *) _hid;
 103         struct usbhid_device *usbhid = hid->driver_data;
 104
 105         dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
 106         if (hid_start_in(hid))
 107                 hid_io_error(hid);
 108 }
 109
 110 /* Workqueue routine to reset the device or clear a halt */
 111 static void hid_reset(struct work_struct *work)
 112 {
 113         struct usbhid_device *usbhid =
 114                 container_of(work, struct usbhid_device, reset_work);
 115         struct hid_device *hid = usbhid->hid;
 116         int rc = 0;
 117
 118         if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
 119                 dev_dbg(&usbhid->intf->dev, "clear halt\n");
 120                 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
 121                 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
 122                 hid_start_in(hid);
 123         }
 124
 125         else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
 126                 dev_dbg(&usbhid->intf->dev, "resetting device\n");
 127                 rc = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
 128                 if (rc == 0) {
 129                         rc = usb_reset_device(hid_to_usb_dev(hid));
 130                         usb_unlock_device(hid_to_usb_dev(hid));
 131                 }
 132                 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
 133         }
 134
 135         switch (rc) {
 136         case 0:
 137                 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
 138                         hid_io_error(hid);
 139                 break;
 140         default:
 141                 err_hid("can't reset device, %s-%s/input%d, status %d",
 142                                 hid_to_usb_dev(hid)->bus->bus_name,
 143                                 hid_to_usb_dev(hid)->devpath,
 144                                 usbhid->ifnum, rc);
 145                 /* FALLTHROUGH */
 146         case -EHOSTUNREACH:
 147         case -ENODEV:
 148         case -EINTR:
 149                 break;
 150         }
 151 }
 152
 153 /* Main I/O error handler */
 154 static void hid_io_error(struct hid_device *hid)
 155 {
 156         unsigned long flags;
 157         struct usbhid_device *usbhid = hid->driver_data;
 158
 159         spin_lock_irqsave(&usbhid->lock, flags);
 160
 161         /* Stop when disconnected */
 162         if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
 163                 goto done;
 164
 165         /* If it has been a while since the last error, we'll assume
 166          * this a brand new error and reset the retry timeout. */
 167         if (time_after(jiffies, usbhid->stop_retry + HZ/2))
 168                 usbhid->retry_delay = 0;
 169
 170         /* When an error occurs, retry at increasing intervals */
 171         if (usbhid->retry_delay == 0) {
 172                 usbhid->retry_delay = 13;       /* Then 26, 52, 104, 104, ... */
 173                 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
 174         } else if (usbhid->retry_delay < 100)
 175                 usbhid->retry_delay *= 2;
 176
 177         if (time_after(jiffies, usbhid->stop_retry)) {
 178
 179                 /* Retries failed, so do a port reset */
 180                 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
 181                         schedule_work(&usbhid->reset_work);
 182                         goto done;
 183                 }
 184         }
 185
 186         mod_timer(&usbhid->io_retry,
 187                         jiffies + msecs_to_jiffies(usbhid->retry_delay));
 188 done:
 189         spin_unlock_irqrestore(&usbhid->lock, flags);
 190 }
 191
 192 static void usbhid_mark_busy(struct usbhid_device *usbhid)
 193 {
 194         struct usb_interface *intf = usbhid->intf;
 195
 196         usb_mark_last_busy(interface_to_usbdev(intf));
 197 }
 198
 199 static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
 200 {
 201         struct hid_device *hid = usb_get_intfdata(usbhid->intf);
 202         int kicked;
 203
 204         if (!hid)
 205                 return 0;
 206
 207         if ((kicked = (usbhid->outhead != usbhid->outtail))) {
 208                 dbg("Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
 209                 if (hid_submit_out(hid)) {
 210                         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 211                         wake_up(&usbhid->wait);
 212                 }
 213         }
 214         return kicked;
 215 }
 216
 217 static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
 218 {
 219         struct hid_device *hid = usb_get_intfdata(usbhid->intf);
 220         int kicked;
 221
 222         WARN_ON(hid == NULL);
 223         if (!hid)
 224                 return 0;
 225
 226         if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
 227                 dbg("Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
 228                 if (hid_submit_ctrl(hid)) {
 229                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 230                         wake_up(&usbhid->wait);
 231                 }
 232         }
 233         return kicked;
 234 }
 235
 236 /*
 237  * Input interrupt completion handler.
 238  */
 239
 240 static void hid_irq_in(struct urb *urb)
 241 {
 242         struct hid_device       *hid = urb->context;
 243         struct usbhid_device    *usbhid = hid->driver_data;
 244         int                     status;
 245
 246         switch (urb->status) {
 247         case 0:                 /* success */
 248                 usbhid_mark_busy(usbhid);
 249                 usbhid->retry_delay = 0;
 250                 hid_input_report(urb->context, HID_INPUT_REPORT,
 251                                  urb->transfer_buffer,
 252                                  urb->actual_length, 1);
 253                 /*
 254                  * autosuspend refused while keys are pressed
 255                  * because most keyboards don't wake up when
 256                  * a key is released
 257                  */
 258                 if (hid_check_keys_pressed(hid))
 259                         set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
 260                 else
 261                         clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
 262                 break;
 263         case -EPIPE:            /* stall */
 264                 usbhid_mark_busy(usbhid);
 265                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 266                 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
 267                 schedule_work(&usbhid->reset_work);
 268                 return;
 269         case -ECONNRESET:       /* unlink */
 270         case -ENOENT:
 271         case -ESHUTDOWN:        /* unplug */
 272                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 273                 return;
 274         case -EILSEQ:           /* protocol error or unplug */
 275         case -EPROTO:           /* protocol error or unplug */
 276         case -ETIME:            /* protocol error or unplug */
 277         case -ETIMEDOUT:        /* Should never happen, but... */
 278                 usbhid_mark_busy(usbhid);
 279                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 280                 hid_io_error(hid);
 281                 return;
 282         default:                /* error */
 283                 dev_warn(&urb->dev->dev, "input irq status %d  "
 284                                 "received\n", urb->status);
 285         }
 286
 287         status = usb_submit_urb(urb, GFP_ATOMIC);
 288         if (status) {
 289                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 290                 if (status != -EPERM) {
 291                         err_hid("can't resubmit intr, %s-%s/input%d, status %d",
 292                                         hid_to_usb_dev(hid)->bus->bus_name,
 293                                         hid_to_usb_dev(hid)->devpath,
 294                                         usbhid->ifnum, status);
 295                         hid_io_error(hid);
 296                 }
 297         }
 298 }
 299
 300 static int hid_submit_out(struct hid_device *hid)
 301 {
 302         struct hid_report *report;
 303         char *raw_report;
 304         struct usbhid_device *usbhid = hid->driver_data;
 305
 306         report = usbhid->out[usbhid->outtail].report;
 307         raw_report = usbhid->out[usbhid->outtail].raw_report;
 308
 309         if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
 310                 usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 311                 usbhid->urbout->dev = hid_to_usb_dev(hid);
 312                 memcpy(usbhid->outbuf, raw_report, usbhid->urbout->transfer_buffer_length);
 313                 kfree(raw_report);
 314
 315                 dbg_hid("submitting out urb\n");
 316
 317                 if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
 318                         err_hid("usb_submit_urb(out) failed");
 319                         return -1;
 320                 }
 321         } else {
 322                 /*
 323                  * queue work to wake up the device.
 324                  * as the work queue is freezeable, this is safe
 325                  * with respect to STD and STR
 326                  */
 327                 queue_work(resumption_waker, &usbhid->restart_work);
 328         }
 329
 330         return 0;
 331 }
 332
 333 static int hid_submit_ctrl(struct hid_device *hid)
 334 {
 335         struct hid_report *report;
 336         unsigned char dir;
 337         char *raw_report;
 338         int len;
 339         struct usbhid_device *usbhid = hid->driver_data;
 340
 341         report = usbhid->ctrl[usbhid->ctrltail].report;
 342         raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
 343         dir = usbhid->ctrl[usbhid->ctrltail].dir;
 344
 345         if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
 346                 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 347                 if (dir == USB_DIR_OUT) {
 348                         usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
 349                         usbhid->urbctrl->transfer_buffer_length = len;
 350                         memcpy(usbhid->ctrlbuf, raw_report, len);
 351                         kfree(raw_report);
 352                 } else {
 353                         int maxpacket, padlen;
 354
 355                         usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
 356                         maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
 357                         if (maxpacket > 0) {
 358                                 padlen = DIV_ROUND_UP(len, maxpacket);
 359                                 padlen *= maxpacket;
 360                                 if (padlen > usbhid->bufsize)
 361                                         padlen = usbhid->bufsize;
 362                         } else
 363                                 padlen = 0;
 364                         usbhid->urbctrl->transfer_buffer_length = padlen;
 365                 }
 366                 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
 367
 368                 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
 369                 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
 370                 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
 371                 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
 372                 usbhid->cr->wLength = cpu_to_le16(len);
 373
 374                 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
 375                         usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
 376                         usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
 377
 378                 if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
 379                         err_hid("usb_submit_urb(ctrl) failed");
 380                         return -1;
 381                 }
 382         } else {
 383                 /*
 384                  * queue work to wake up the device.
 385                  * as the work queue is freezeable, this is safe
 386                  * with respect to STD and STR
 387                  */
 388                 queue_work(resumption_waker, &usbhid->restart_work);
 389         }
 390
 391         return 0;
 392 }
 393
 394 /*
 395  * Output interrupt completion handler.
 396  */
 397
 398 static void hid_irq_out(struct urb *urb)
 399 {
 400         struct hid_device *hid = urb->context;
 401         struct usbhid_device *usbhid = hid->driver_data;
 402         unsigned long flags;
 403         int unplug = 0;
 404
 405         switch (urb->status) {
 406         case 0:                 /* success */
 407                 break;
 408         case -ESHUTDOWN:        /* unplug */
 409                 unplug = 1;
 410         case -EILSEQ:           /* protocol error or unplug */
 411         case -EPROTO:           /* protocol error or unplug */
 412         case -ECONNRESET:       /* unlink */
 413         case -ENOENT:
 414                 break;
 415         default:                /* error */
 416                 dev_warn(&urb->dev->dev, "output irq status %d "
 417                                 "received\n", urb->status);
 418         }
 419
 420         spin_lock_irqsave(&usbhid->lock, flags);
 421
 422         if (unplug)
 423                 usbhid->outtail = usbhid->outhead;
 424         else
 425                 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
 426
 427         if (usbhid->outhead != usbhid->outtail) {
 428                 if (hid_submit_out(hid)) {
 429                         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 430                         wake_up(&usbhid->wait);
 431                 }
 432                 spin_unlock_irqrestore(&usbhid->lock, flags);
 433                 return;
 434         }
 435
 436         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 437         spin_unlock_irqrestore(&usbhid->lock, flags);
 438         wake_up(&usbhid->wait);
 439 }
 440
 441 /*
 442  * Control pipe completion handler.
 443  */
 444
 445 static void hid_ctrl(struct urb *urb)
 446 {
 447         struct hid_device *hid = urb->context;
 448         struct usbhid_device *usbhid = hid->driver_data;
 449         int unplug = 0, status = urb->status;
 450
 451         spin_lock(&usbhid->lock);
 452
 453         switch (status) {
 454         case 0:                 /* success */
 455                 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
 456                         hid_input_report(urb->context,
 457                                 usbhid->ctrl[usbhid->ctrltail].report->type,
 458                                 urb->transfer_buffer, urb->actual_length, 0);
 459                 break;
 460         case -ESHUTDOWN:        /* unplug */
 461                 unplug = 1;
 462         case -EILSEQ:           /* protocol error or unplug */
 463         case -EPROTO:           /* protocol error or unplug */
 464         case -ECONNRESET:       /* unlink */
 465         case -ENOENT:
 466         case -EPIPE:            /* report not available */
 467                 break;
 468         default:                /* error */
 469                 dev_warn(&urb->dev->dev, "ctrl urb status %d "
 470                                 "received\n", status);
 471         }
 472
 473         if (unplug)
 474                 usbhid->ctrltail = usbhid->ctrlhead;
 475         else
 476                 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
 477
 478         if (usbhid->ctrlhead != usbhid->ctrltail) {
 479                 if (hid_submit_ctrl(hid)) {
 480                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 481                         wake_up(&usbhid->wait);
 482                 }
 483                 spin_unlock(&usbhid->lock);
 484                 return;
 485         }
 486
 487         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 488         spin_unlock(&usbhid->lock);
 489         wake_up(&usbhid->wait);
 490 }
 491
 492 void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
 493 {
 494         int head;
 495         struct usbhid_device *usbhid = hid->driver_data;
 496         int len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 497
 498         if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
 499                 return;
 500
 501         if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
 502                 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
 503                         dev_warn(&hid->dev, "output queue full\n");
 504                         return;
 505                 }
 506
 507                 usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC);
 508                 if (!usbhid->out[usbhid->outhead].raw_report) {
 509                         dev_warn(&hid->dev, "output queueing failed\n");
 510                         return;
 511                 }
 512                 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
 513                 usbhid->out[usbhid->outhead].report = report;
 514                 usbhid->outhead = head;
 515
 516                 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl))
 517                         if (hid_submit_out(hid))
 518                                 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 519                 return;
 520         }
 521
 522         if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
 523                 dev_warn(&hid->dev, "control queue full\n");
 524                 return;
 525         }
 526
 527         if (dir == USB_DIR_OUT) {
 528                 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC);
 529                 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
 530                         dev_warn(&hid->dev, "control queueing failed\n");
 531                         return;
 532                 }
 533                 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
 534         }
 535         usbhid->ctrl[usbhid->ctrlhead].report = report;
 536         usbhid->ctrl[usbhid->ctrlhead].dir = dir;
 537         usbhid->ctrlhead = head;
 538
 539         if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
 540                 if (hid_submit_ctrl(hid))
 541                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 542 }
 543
 544 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
 545 {
 546         struct usbhid_device *usbhid = hid->driver_data;
 547         unsigned long flags;
 548
 549         spin_lock_irqsave(&usbhid->lock, flags);
 550         __usbhid_submit_report(hid, report, dir);
 551         spin_unlock_irqrestore(&usbhid->lock, flags);
 552 }
 553 EXPORT_SYMBOL_GPL(usbhid_submit_report);
 554
 555 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
 556 {
 557         struct hid_device *hid = input_get_drvdata(dev);
 558         struct usbhid_device *usbhid = hid->driver_data;
 559         struct hid_field *field;
 560         unsigned long flags;
 561         int offset;
 562
 563         if (type == EV_FF)
 564                 return input_ff_event(dev, type, code, value);
 565
 566         if (type != EV_LED)
 567                 return -1;
 568
 569         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
 570                 dev_warn(&dev->dev, "event field not found\n");
 571                 return -1;
 572         }
 573
 574         hid_set_field(field, offset, value);
 575         if (value) {
 576                 spin_lock_irqsave(&usbhid->lock, flags);
 577                 usbhid->ledcount++;
 578                 spin_unlock_irqrestore(&usbhid->lock, flags);
 579         } else {
 580                 spin_lock_irqsave(&usbhid->lock, flags);
 581                 usbhid->ledcount--;
 582                 spin_unlock_irqrestore(&usbhid->lock, flags);
 583         }
 584         usbhid_submit_report(hid, field->report, USB_DIR_OUT);
 585
 586         return 0;
 587 }
 588
 589 int usbhid_wait_io(struct hid_device *hid)
 590 {
 591         struct usbhid_device *usbhid = hid->driver_data;
 592
 593         if (!wait_event_timeout(usbhid->wait,
 594                                 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
 595                                 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
 596                                         10*HZ)) {
 597                 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
 598                 return -1;
 599         }
 600
 601         return 0;
 602 }
 603
 604 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
 605 {
 606         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 607                 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
 608                 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
 609 }
 610
 611 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
 612                 unsigned char type, void *buf, int size)
 613 {
 614         int result, retries = 4;
 615
 616         memset(buf, 0, size);
 617
 618         do {
 619                 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 620                                 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
 621                                 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
 622                 retries--;
 623         } while (result < size && retries);
 624         return result;
 625 }
 626
 627 int usbhid_open(struct hid_device *hid)
 628 {
 629         struct usbhid_device *usbhid = hid->driver_data;
 630         int res;
 631
 632         mutex_lock(&hid_open_mut);
 633         if (!hid->open++) {
 634                 res = usb_autopm_get_interface(usbhid->intf);
 635                 /* the device must be awake to reliable request remote wakeup */
 636                 if (res < 0) {
 637                         hid->open--;
 638                         mutex_unlock(&hid_open_mut);
 639                         return -EIO;
 640                 }
 641                 usbhid->intf->needs_remote_wakeup = 1;
 642                 if (hid_start_in(hid))
 643                         hid_io_error(hid);
 644
 645                 usb_autopm_put_interface(usbhid->intf);
 646         }
 647         mutex_unlock(&hid_open_mut);
 648         return 0;
 649 }
 650
 651 void usbhid_close(struct hid_device *hid)
 652 {
 653         struct usbhid_device *usbhid = hid->driver_data;
 654
 655         mutex_lock(&hid_open_mut);
 656
 657         /* protecting hid->open to make sure we don't restart
 658          * data acquistion due to a resumption we no longer
 659          * care about
 660          */
 661         spin_lock_irq(&usbhid->lock);
 662         if (!--hid->open) {
 663                 spin_unlock_irq(&usbhid->lock);
 664                 hid_cancel_delayed_stuff(usbhid);
 665                 usb_kill_urb(usbhid->urbin);
 666                 usbhid->intf->needs_remote_wakeup = 0;
 667         } else {
 668                 spin_unlock_irq(&usbhid->lock);
 669         }
 670         mutex_unlock(&hid_open_mut);
 671 }
 672
 673 /*
 674  * Initialize all reports
 675  */
 676
 677 void usbhid_init_reports(struct hid_device *hid)
 678 {
 679         struct hid_report *report;
 680         struct usbhid_device *usbhid = hid->driver_data;
 681         int err, ret;
 682
 683         list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
 684                 usbhid_submit_report(hid, report, USB_DIR_IN);
 685
 686         list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
 687                 usbhid_submit_report(hid, report, USB_DIR_IN);
 688
 689         err = 0;
 690         ret = usbhid_wait_io(hid);
 691         while (ret) {
 692                 err |= ret;
 693                 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
 694                         usb_kill_urb(usbhid->urbctrl);
 695                 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
 696                         usb_kill_urb(usbhid->urbout);
 697                 ret = usbhid_wait_io(hid);
 698         }
 699
 700         if (err)
 701                 dev_warn(&hid->dev, "timeout initializing reports\n");
 702 }
 703
 704 /*
 705  * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
 706  */
 707 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
 708     unsigned int hid_code, struct hid_field **pfield)
 709 {
 710         struct hid_report *report;
 711         struct hid_field *field;
 712         struct hid_usage *usage;
 713         int i, j;
 714
 715         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
 716                 for (i = 0; i < report->maxfield; i++) {
 717                         field = report->field[i];
 718                         for (j = 0; j < field->maxusage; j++) {
 719                                 usage = &field->usage[j];
 720                                 if ((usage->hid & HID_USAGE_PAGE) == page &&
 721                                     (usage->hid & 0xFFFF) == hid_code) {
 722                                         *pfield = field;
 723                                         return j;
 724                                 }
 725                         }
 726                 }
 727         }
 728         return -1;
 729 }
 730
 731 void usbhid_set_leds(struct hid_device *hid)
 732 {
 733         struct hid_field *field;
 734         int offset;
 735
 736         if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
 737                 hid_set_field(field, offset, 0);
 738                 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
 739         }
 740 }
 741 EXPORT_SYMBOL_GPL(usbhid_set_leds);
 742
 743 /*
 744  * Traverse the supplied list of reports and find the longest
 745  */
 746 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
 747                 unsigned int *max)
 748 {
 749         struct hid_report *report;
 750         unsigned int size;
 751
 752         list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
 753                 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
 754                 if (*max < size)
 755                         *max = size;
 756         }
 757 }
 758
 759 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
 760 {
 761         struct usbhid_device *usbhid = hid->driver_data;
 762
 763         usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
 764                         &usbhid->inbuf_dma);
 765         usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
 766                         &usbhid->outbuf_dma);
 767         usbhid->cr = usb_buffer_alloc(dev, sizeof(*usbhid->cr), GFP_KERNEL,
 768                         &usbhid->cr_dma);
 769         usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
 770                         &usbhid->ctrlbuf_dma);
 771         if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
 772                         !usbhid->ctrlbuf)
 773                 return -1;
 774
 775         return 0;
 776 }
 777
 778 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
 779 {
 780         struct usbhid_device *usbhid = hid->driver_data;
 781         struct usb_device *dev = hid_to_usb_dev(hid);
 782         struct usb_interface *intf = usbhid->intf;
 783         struct usb_host_interface *interface = intf->cur_altsetting;
 784         int ret;
 785
 786         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 787                 HID_REQ_SET_REPORT,
 788                 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 789                 ((HID_OUTPUT_REPORT + 1) << 8) | *buf,
 790                 interface->desc.bInterfaceNumber, buf + 1, count - 1,
 791                 USB_CTRL_SET_TIMEOUT);
 792
 793         /* count also the report id */
 794         if (ret > 0)
 795                 ret++;
 796
 797         return ret;
 798 }
 799
 800 static void usbhid_restart_queues(struct usbhid_device *usbhid)
 801 {
 802         if (usbhid->urbout)
 803                 usbhid_restart_out_queue(usbhid);
 804         usbhid_restart_ctrl_queue(usbhid);
 805 }
 806
 807 static void __usbhid_restart_queues(struct work_struct *work)
 808 {
 809         struct usbhid_device *usbhid =
 810                 container_of(work, struct usbhid_device, restart_work);
 811         int r;
 812
 813         r = usb_autopm_get_interface(usbhid->intf);
 814         if (r < 0)
 815                 return;
 816         usb_autopm_put_interface(usbhid->intf);
 817 }
 818
 819 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
 820 {
 821         struct usbhid_device *usbhid = hid->driver_data;
 822
 823         usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
 824         usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
 825         usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
 826         usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
 827 }
 828
 829 static int usbhid_parse(struct hid_device *hid)
 830 {
 831         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
 832         struct usb_host_interface *interface = intf->cur_altsetting;
 833         struct usb_device *dev = interface_to_usbdev (intf);
 834         struct hid_descriptor *hdesc;
 835         u32 quirks = 0;
 836         unsigned int rsize = 0;
 837         char *rdesc;
 838         int ret, n;
 839
 840         quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
 841                         le16_to_cpu(dev->descriptor.idProduct));
 842
 843         if (quirks & HID_QUIRK_IGNORE)
 844                 return -ENODEV;
 845
 846         /* Many keyboards and mice don't like to be polled for reports,
 847          * so we will always set the HID_QUIRK_NOGET flag for them. */
 848         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
 849                 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
 850                         interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
 851                                 quirks |= HID_QUIRK_NOGET;
 852         }
 853
 854         if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
 855             (!interface->desc.bNumEndpoints ||
 856              usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
 857                 dbg_hid("class descriptor not present\n");
 858                 return -ENODEV;
 859         }
 860
 861         hid->version = le16_to_cpu(hdesc->bcdHID);
 862         hid->country = hdesc->bCountryCode;
 863
 864         for (n = 0; n < hdesc->bNumDescriptors; n++)
 865                 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
 866                         rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
 867
 868         if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
 869                 dbg_hid("weird size of report descriptor (%u)\n", rsize);
 870                 return -EINVAL;
 871         }
 872
 873         if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
 874                 dbg_hid("couldn't allocate rdesc memory\n");
 875                 return -ENOMEM;
 876         }
 877
 878         hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
 879
 880         ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
 881                         HID_DT_REPORT, rdesc, rsize);
 882         if (ret < 0) {
 883                 dbg_hid("reading report descriptor failed\n");
 884                 kfree(rdesc);
 885                 goto err;
 886         }
 887
 888         dbg_hid("report descriptor (size %u, read %d) = ", rsize, n);
 889         for (n = 0; n < rsize; n++)
 890                 dbg_hid_line(" %02x", (unsigned char) rdesc[n]);
 891         dbg_hid_line("\n");
 892
 893         ret = hid_parse_report(hid, rdesc, rsize);
 894         kfree(rdesc);
 895         if (ret) {
 896                 dbg_hid("parsing report descriptor failed\n");
 897                 goto err;
 898         }
 899
 900         hid->quirks |= quirks;
 901
 902         return 0;
 903 err:
 904         return ret;
 905 }
 906
 907 static int usbhid_start(struct hid_device *hid)
 908 {
 909         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
 910         struct usb_host_interface *interface = intf->cur_altsetting;
 911         struct usb_device *dev = interface_to_usbdev(intf);
 912         struct usbhid_device *usbhid = hid->driver_data;
 913         unsigned int n, insize = 0;
 914         int ret;
 915
 916         clear_bit(HID_DISCONNECTED, &usbhid->iofl);
 917
 918         usbhid->bufsize = HID_MIN_BUFFER_SIZE;
 919         hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
 920         hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
 921         hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
 922
 923         if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
 924                 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
 925
 926         hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
 927
 928         if (insize > HID_MAX_BUFFER_SIZE)
 929                 insize = HID_MAX_BUFFER_SIZE;
 930
 931         if (hid_alloc_buffers(dev, hid)) {
 932                 ret = -ENOMEM;
 933                 goto fail;
 934         }
 935
 936         for (n = 0; n < interface->desc.bNumEndpoints; n++) {
 937                 struct usb_endpoint_descriptor *endpoint;
 938                 int pipe;
 939                 int interval;
 940
 941                 endpoint = &interface->endpoint[n].desc;
 942                 if (!usb_endpoint_xfer_int(endpoint))
 943                         continue;
 944
 945                 interval = endpoint->bInterval;
 946
 947                 /* Some vendors give fullspeed interval on highspeed devides */
 948                 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
 949                     dev->speed == USB_SPEED_HIGH) {
 950                         interval = fls(endpoint->bInterval*8);
 951                         printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
 952                                hid->name, endpoint->bInterval, interval);
 953                 }
 954
 955                 /* Change the polling interval of mice. */
 956                 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
 957                         interval = hid_mousepoll_interval;
 958
 959                 ret = -ENOMEM;
 960                 if (usb_endpoint_dir_in(endpoint)) {
 961                         if (usbhid->urbin)
 962                                 continue;
 963                         if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
 964                                 goto fail;
 965                         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 966                         usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
 967                                          hid_irq_in, hid, interval);
 968                         usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
 969                         usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 970                 } else {
 971                         if (usbhid->urbout)
 972                                 continue;
 973                         if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
 974                                 goto fail;
 975                         pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
 976                         usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
 977                                          hid_irq_out, hid, interval);
 978                         usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
 979                         usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 980                 }
 981         }
 982
 983         init_waitqueue_head(&usbhid->wait);
 984         INIT_WORK(&usbhid->reset_work, hid_reset);
 985         INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
 986         setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
 987
 988         spin_lock_init(&usbhid->lock);
 989         spin_lock_init(&usbhid->lock);
 990
 991         usbhid->intf = intf;
 992         usbhid->ifnum = interface->desc.bInterfaceNumber;
 993
 994         usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
 995         if (!usbhid->urbctrl) {
 996                 ret = -ENOMEM;
 997                 goto fail;
 998         }
 999
1000         usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
1001                              usbhid->ctrlbuf, 1, hid_ctrl, hid);
1002         usbhid->urbctrl->setup_dma = usbhid->cr_dma;
1003         usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
1004         usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
1005
1006         usbhid_init_reports(hid);
1007         hid_dump_device(hid);
1008
1009         set_bit(HID_STARTED, &usbhid->iofl);
1010
1011         /* Some keyboards don't work until their LEDs have been set.
1012          * Since BIOSes do set the LEDs, it must be safe for any device
1013          * that supports the keyboard boot protocol.
1014          */
1015         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1016                         interface->desc.bInterfaceProtocol ==
1017                                 USB_INTERFACE_PROTOCOL_KEYBOARD)
1018                 usbhid_set_leds(hid);
1019
1020         return 0;
1021
1022 fail:
1023         usb_free_urb(usbhid->urbin);
1024         usb_free_urb(usbhid->urbout);
1025         usb_free_urb(usbhid->urbctrl);
1026         usbhid->urbin = NULL;
1027         usbhid->urbout = NULL;
1028         usbhid->urbctrl = NULL;
1029         hid_free_buffers(dev, hid);
1030         return ret;
1031 }
1032
1033 static void usbhid_stop(struct hid_device *hid)
1034 {
1035         struct usbhid_device *usbhid = hid->driver_data;
1036
1037         if (WARN_ON(!usbhid))
1038                 return;
1039
1040         clear_bit(HID_STARTED, &usbhid->iofl);
1041         spin_lock_irq(&usbhid->lock);   /* Sync with error handler */
1042         set_bit(HID_DISCONNECTED, &usbhid->iofl);
1043         spin_unlock_irq(&usbhid->lock);
1044         usb_kill_urb(usbhid->urbin);
1045         usb_kill_urb(usbhid->urbout);
1046         usb_kill_urb(usbhid->urbctrl);
1047
1048         hid_cancel_delayed_stuff(usbhid);
1049
1050         if (hid->claimed & HID_CLAIMED_INPUT)
1051                 hidinput_disconnect(hid);
1052         if (hid->claimed & HID_CLAIMED_HIDDEV)
1053                 hiddev_disconnect(hid);
1054         if (hid->claimed & HID_CLAIMED_HIDRAW)
1055                 hidraw_disconnect(hid);
1056
1057         hid->claimed = 0;
1058
1059         usb_free_urb(usbhid->urbin);
1060         usb_free_urb(usbhid->urbctrl);
1061         usb_free_urb(usbhid->urbout);
1062         usbhid->urbin = NULL; /* don't mess up next start */
1063         usbhid->urbctrl = NULL;
1064         usbhid->urbout = NULL;
1065
1066         hid_free_buffers(hid_to_usb_dev(hid), hid);
1067 }
1068
1069 static int usbhid_power(struct hid_device *hid, int lvl)
1070 {
1071         int r = 0;
1072
1073         switch (lvl) {
1074         case PM_HINT_FULLON:
1075                 r = usbhid_get_power(hid);
1076                 break;
1077         case PM_HINT_NORMAL:
1078                 usbhid_put_power(hid);
1079                 break;
1080         }
1081         return r;
1082 }
1083
1084 static struct hid_ll_driver usb_hid_driver = {
1085         .parse = usbhid_parse,
1086         .start = usbhid_start,
1087         .stop = usbhid_stop,
1088         .open = usbhid_open,
1089         .close = usbhid_close,
1090         .power = usbhid_power,
1091         .hidinput_input_event = usb_hidinput_input_event,
1092 };
1093
1094 static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1095 {
1096         struct usb_host_interface *interface = intf->cur_altsetting;
1097         struct usb_device *dev = interface_to_usbdev(intf);
1098         struct usbhid_device *usbhid;
1099         struct hid_device *hid;
1100         unsigned int n, has_in = 0;
1101         size_t len;
1102         int ret;
1103
1104         dbg_hid("HID probe called for ifnum %d\n",
1105                         intf->altsetting->desc.bInterfaceNumber);
1106
1107         for (n = 0; n < interface->desc.bNumEndpoints; n++)
1108                 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1109                         has_in++;
1110         if (!has_in) {
1111                 dev_err(&intf->dev, "couldn't find an input interrupt "
1112                                 "endpoint\n");
1113                 return -ENODEV;
1114         }
1115
1116         hid = hid_allocate_device();
1117         if (IS_ERR(hid))
1118                 return PTR_ERR(hid);
1119
1120         usb_set_intfdata(intf, hid);
1121         hid->ll_driver = &usb_hid_driver;
1122         hid->hid_output_raw_report = usbhid_output_raw_report;
1123         hid->ff_init = hid_pidff_init;
1124 #ifdef CONFIG_USB_HIDDEV
1125         hid->hiddev_connect = hiddev_connect;
1126         hid->hiddev_hid_event = hiddev_hid_event;
1127         hid->hiddev_report_event = hiddev_report_event;
1128 #endif
1129         hid->dev.parent = &intf->dev;
1130         hid->bus = BUS_USB;
1131         hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1132         hid->product = le16_to_cpu(dev->descriptor.idProduct);
1133         hid->name[0] = 0;
1134         if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1135                         USB_INTERFACE_PROTOCOL_MOUSE)
1136                 hid->type = HID_TYPE_USBMOUSE;
1137
1138         if (dev->manufacturer)
1139                 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1140
1141         if (dev->product) {
1142                 if (dev->manufacturer)
1143                         strlcat(hid->name, " ", sizeof(hid->name));
1144                 strlcat(hid->name, dev->product, sizeof(hid->name));
1145         }
1146
1147         if (!strlen(hid->name))
1148                 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1149                          le16_to_cpu(dev->descriptor.idVendor),
1150                          le16_to_cpu(dev->descriptor.idProduct));
1151
1152         usb_make_path(dev, hid->phys, sizeof(hid->phys));
1153         strlcat(hid->phys, "/input", sizeof(hid->phys));
1154         len = strlen(hid->phys);
1155         if (len < sizeof(hid->phys) - 1)
1156                 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1157                          "%d", intf->altsetting[0].desc.bInterfaceNumber);
1158
1159         if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1160                 hid->uniq[0] = 0;
1161
1162         usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1163         if (usbhid == NULL) {
1164                 ret = -ENOMEM;
1165                 goto err;
1166         }
1167
1168         hid->driver_data = usbhid;
1169         usbhid->hid = hid;
1170
1171         ret = hid_add_device(hid);
1172         if (ret) {
1173                 if (ret != -ENODEV)
1174                         dev_err(&intf->dev, "can't add hid device: %d\n", ret);
1175                 goto err_free;
1176         }
1177
1178         return 0;
1179 err_free:
1180         kfree(usbhid);
1181 err:
1182         hid_destroy_device(hid);
1183         return ret;
1184 }
1185
1186 static void hid_disconnect(struct usb_interface *intf)
1187 {
1188         struct hid_device *hid = usb_get_intfdata(intf);
1189         struct usbhid_device *usbhid;
1190
1191         if (WARN_ON(!hid))
1192                 return;
1193
1194         usbhid = hid->driver_data;
1195         hid_destroy_device(hid);
1196         kfree(usbhid);
1197 }
1198
1199 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1200 {
1201         del_timer_sync(&usbhid->io_retry);
1202         cancel_work_sync(&usbhid->restart_work);
1203         cancel_work_sync(&usbhid->reset_work);
1204 }
1205
1206 static void hid_cease_io(struct usbhid_device *usbhid)
1207 {
1208         del_timer(&usbhid->io_retry);
1209         usb_kill_urb(usbhid->urbin);
1210         usb_kill_urb(usbhid->urbctrl);
1211         usb_kill_urb(usbhid->urbout);
1212 }
1213
1214 /* Treat USB reset pretty much the same as suspend/resume */
1215 static int hid_pre_reset(struct usb_interface *intf)
1216 {
1217         struct hid_device *hid = usb_get_intfdata(intf);
1218         struct usbhid_device *usbhid = hid->driver_data;
1219
1220         spin_lock_irq(&usbhid->lock);
1221         set_bit(HID_RESET_PENDING, &usbhid->iofl);
1222         spin_unlock_irq(&usbhid->lock);
1223         cancel_work_sync(&usbhid->restart_work);
1224         hid_cease_io(usbhid);
1225
1226         return 0;
1227 }
1228
1229 /* Same routine used for post_reset and reset_resume */
1230 static int hid_post_reset(struct usb_interface *intf)
1231 {
1232         struct usb_device *dev = interface_to_usbdev (intf);
1233         struct hid_device *hid = usb_get_intfdata(intf);
1234         struct usbhid_device *usbhid = hid->driver_data;
1235         int status;
1236
1237         spin_lock_irq(&usbhid->lock);
1238         clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1239         spin_unlock_irq(&usbhid->lock);
1240         hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1241         status = hid_start_in(hid);
1242         if (status < 0)
1243                 hid_io_error(hid);
1244         usbhid_restart_queues(usbhid);
1245
1246         return 0;
1247 }
1248
1249 int usbhid_get_power(struct hid_device *hid)
1250 {
1251         struct usbhid_device *usbhid = hid->driver_data;
1252
1253         return usb_autopm_get_interface(usbhid->intf);
1254 }
1255
1256 void usbhid_put_power(struct hid_device *hid)
1257 {
1258         struct usbhid_device *usbhid = hid->driver_data;
1259
1260         usb_autopm_put_interface(usbhid->intf);
1261 }
1262
1263
1264 #ifdef CONFIG_PM
1265 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1266 {
1267         struct hid_device *hid = usb_get_intfdata(intf);
1268         struct usbhid_device *usbhid = hid->driver_data;
1269         struct usb_device *udev = interface_to_usbdev(intf);
1270         int status;
1271
1272         if (udev->auto_pm) {
1273                 spin_lock_irq(&usbhid->lock);   /* Sync with error handler */
1274                 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1275                     && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1276                     && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1277                     && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1278                     && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1279                     && (!usbhid->ledcount || ignoreled))
1280                 {
1281                         set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1282                         spin_unlock_irq(&usbhid->lock);
1283                 } else {
1284                         usbhid_mark_busy(usbhid);
1285                         spin_unlock_irq(&usbhid->lock);
1286                         return -EBUSY;
1287                 }
1288
1289         } else {
1290                 spin_lock_irq(&usbhid->lock);
1291                 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1292                 spin_unlock_irq(&usbhid->lock);
1293                 if (usbhid_wait_io(hid) < 0)
1294                         return -EIO;
1295         }
1296
1297         if (!ignoreled && udev->auto_pm) {
1298                 spin_lock_irq(&usbhid->lock);
1299                 if (test_bit(HID_LED_ON, &usbhid->iofl)) {
1300                         spin_unlock_irq(&usbhid->lock);
1301                         usbhid_mark_busy(usbhid);
1302                         return -EBUSY;
1303                 }
1304                 spin_unlock_irq(&usbhid->lock);
1305         }
1306
1307         hid_cancel_delayed_stuff(usbhid);
1308         hid_cease_io(usbhid);
1309
1310         if (udev->auto_pm && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1311                 /* lost race against keypresses */
1312                 status = hid_start_in(hid);
1313                 if (status < 0)
1314                         hid_io_error(hid);
1315                 usbhid_mark_busy(usbhid);
1316                 return -EBUSY;
1317         }
1318         dev_dbg(&intf->dev, "suspend\n");
1319         return 0;
1320 }
1321
1322 static int hid_resume(struct usb_interface *intf)
1323 {
1324         struct hid_device *hid = usb_get_intfdata (intf);
1325         struct usbhid_device *usbhid = hid->driver_data;
1326         int status;
1327
1328         if (!test_bit(HID_STARTED, &usbhid->iofl))
1329                 return 0;
1330
1331         clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1332         usbhid_mark_busy(usbhid);
1333
1334         if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1335             test_bit(HID_RESET_PENDING, &usbhid->iofl))
1336                 schedule_work(&usbhid->reset_work);
1337         usbhid->retry_delay = 0;
1338         status = hid_start_in(hid);
1339         if (status < 0)
1340                 hid_io_error(hid);
1341         usbhid_restart_queues(usbhid);
1342
1343         dev_dbg(&intf->dev, "resume status %d\n", status);
1344         return 0;
1345 }
1346
1347 static int hid_reset_resume(struct usb_interface *intf)
1348 {
1349         struct hid_device *hid = usb_get_intfdata(intf);
1350         struct usbhid_device *usbhid = hid->driver_data;
1351
1352         clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1353         return hid_post_reset(intf);
1354 }
1355
1356 #endif /* CONFIG_PM */
1357
1358 static struct usb_device_id hid_usb_ids [] = {
1359         { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1360                 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1361         { }                                             /* Terminating entry */
1362 };
1363
1364 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1365
1366 static struct usb_driver hid_driver = {
1367         .name =         "usbhid",
1368         .probe =        hid_probe,
1369         .disconnect =   hid_disconnect,
1370 #ifdef CONFIG_PM
1371         .suspend =      hid_suspend,
1372         .resume =       hid_resume,
1373         .reset_resume = hid_reset_resume,
1374 #endif
1375         .pre_reset =    hid_pre_reset,
1376         .post_reset =   hid_post_reset,
1377         .id_table =     hid_usb_ids,
1378         .supports_autosuspend = 1,
1379 };
1380
1381 static const struct hid_device_id hid_usb_table[] = {
1382         { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1383         { }
1384 };
1385
1386 static struct hid_driver hid_usb_driver = {
1387         .name = "generic-usb",
1388         .id_table = hid_usb_table,
1389 };
1390
1391 static int __init hid_init(void)
1392 {
1393         int retval = -ENOMEM;
1394
1395         resumption_waker = create_freezeable_workqueue("usbhid_resumer");
1396         if (!resumption_waker)
1397                 goto no_queue;
1398         retval = hid_register_driver(&hid_usb_driver);
1399         if (retval)
1400                 goto hid_register_fail;
1401         retval = usbhid_quirks_init(quirks_param);
1402         if (retval)
1403                 goto usbhid_quirks_init_fail;
1404         retval = hiddev_init();
1405         if (retval)
1406                 goto hiddev_init_fail;
1407         retval = usb_register(&hid_driver);
1408         if (retval)
1409                 goto usb_register_fail;
1410         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1411                         DRIVER_DESC "\n");
1412
1413         return 0;
1414 usb_register_fail:
1415         hiddev_exit();
1416 hiddev_init_fail:
1417         usbhid_quirks_exit();
1418 usbhid_quirks_init_fail:
1419         hid_unregister_driver(&hid_usb_driver);
1420 hid_register_fail:
1421         destroy_workqueue(resumption_waker);
1422 no_queue:
1423         return retval;
1424 }
1425
1426 static void __exit hid_exit(void)
1427 {
1428         usb_deregister(&hid_driver);
1429         hiddev_exit();
1430         usbhid_quirks_exit();
1431         hid_unregister_driver(&hid_usb_driver);
1432         destroy_workqueue(resumption_waker);
1433 }
1434
1435 module_init(hid_init);
1436 module_exit(hid_exit);
1437
1438 MODULE_AUTHOR(DRIVER_AUTHOR);
1439 MODULE_DESCRIPTION(DRIVER_DESC);
1440 MODULE_LICENSE(DRIVER_LICENSE);