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) 2007-2008 Oliver Neukum
   8  *  Copyright (c) 2006-2009 Jiri Kosina
   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 static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
 493                                    unsigned char dir)
 494 {
 495         int head;
 496         struct usbhid_device *usbhid = hid->driver_data;
 497         int len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 498
 499         if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
 500                 return;
 501
 502         if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
 503                 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
 504                         dev_warn(&hid->dev, "output queue full\n");
 505                         return;
 506                 }
 507
 508                 usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC);
 509                 if (!usbhid->out[usbhid->outhead].raw_report) {
 510                         dev_warn(&hid->dev, "output queueing failed\n");
 511                         return;
 512                 }
 513                 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
 514                 usbhid->out[usbhid->outhead].report = report;
 515                 usbhid->outhead = head;
 516
 517                 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl))
 518                         if (hid_submit_out(hid))
 519                                 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 520                 return;
 521         }
 522
 523         if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
 524                 dev_warn(&hid->dev, "control queue full\n");
 525                 return;
 526         }
 527
 528         if (dir == USB_DIR_OUT) {
 529                 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC);
 530                 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
 531                         dev_warn(&hid->dev, "control queueing failed\n");
 532                         return;
 533                 }
 534                 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
 535         }
 536         usbhid->ctrl[usbhid->ctrlhead].report = report;
 537         usbhid->ctrl[usbhid->ctrlhead].dir = dir;
 538         usbhid->ctrlhead = head;
 539
 540         if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
 541                 if (hid_submit_ctrl(hid))
 542                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 543 }
 544
 545 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
 546 {
 547         struct usbhid_device *usbhid = hid->driver_data;
 548         unsigned long flags;
 549
 550         spin_lock_irqsave(&usbhid->lock, flags);
 551         __usbhid_submit_report(hid, report, dir);
 552         spin_unlock_irqrestore(&usbhid->lock, flags);
 553 }
 554 EXPORT_SYMBOL_GPL(usbhid_submit_report);
 555
 556 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
 557 {
 558         struct hid_device *hid = input_get_drvdata(dev);
 559         struct usbhid_device *usbhid = hid->driver_data;
 560         struct hid_field *field;
 561         unsigned long flags;
 562         int offset;
 563
 564         if (type == EV_FF)
 565                 return input_ff_event(dev, type, code, value);
 566
 567         if (type != EV_LED)
 568                 return -1;
 569
 570         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
 571                 dev_warn(&dev->dev, "event field not found\n");
 572                 return -1;
 573         }
 574
 575         hid_set_field(field, offset, value);
 576         if (value) {
 577                 spin_lock_irqsave(&usbhid->lock, flags);
 578                 usbhid->ledcount++;
 579                 spin_unlock_irqrestore(&usbhid->lock, flags);
 580         } else {
 581                 spin_lock_irqsave(&usbhid->lock, flags);
 582                 usbhid->ledcount--;
 583                 spin_unlock_irqrestore(&usbhid->lock, flags);
 584         }
 585         usbhid_submit_report(hid, field->report, USB_DIR_OUT);
 586
 587         return 0;
 588 }
 589
 590 int usbhid_wait_io(struct hid_device *hid)
 591 {
 592         struct usbhid_device *usbhid = hid->driver_data;
 593
 594         if (!wait_event_timeout(usbhid->wait,
 595                                 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
 596                                 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
 597                                         10*HZ)) {
 598                 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
 599                 return -1;
 600         }
 601
 602         return 0;
 603 }
 604
 605 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
 606 {
 607         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 608                 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
 609                 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
 610 }
 611
 612 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
 613                 unsigned char type, void *buf, int size)
 614 {
 615         int result, retries = 4;
 616
 617         memset(buf, 0, size);
 618
 619         do {
 620                 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 621                                 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
 622                                 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
 623                 retries--;
 624         } while (result < size && retries);
 625         return result;
 626 }
 627
 628 int usbhid_open(struct hid_device *hid)
 629 {
 630         struct usbhid_device *usbhid = hid->driver_data;
 631         int res;
 632
 633         mutex_lock(&hid_open_mut);
 634         if (!hid->open++) {
 635                 res = usb_autopm_get_interface(usbhid->intf);
 636                 /* the device must be awake to reliable request remote wakeup */
 637                 if (res < 0) {
 638                         hid->open--;
 639                         mutex_unlock(&hid_open_mut);
 640                         return -EIO;
 641                 }
 642                 usbhid->intf->needs_remote_wakeup = 1;
 643                 if (hid_start_in(hid))
 644                         hid_io_error(hid);
 645
 646                 usb_autopm_put_interface(usbhid->intf);
 647         }
 648         mutex_unlock(&hid_open_mut);
 649         return 0;
 650 }
 651
 652 void usbhid_close(struct hid_device *hid)
 653 {
 654         struct usbhid_device *usbhid = hid->driver_data;
 655
 656         mutex_lock(&hid_open_mut);
 657
 658         /* protecting hid->open to make sure we don't restart
 659          * data acquistion due to a resumption we no longer
 660          * care about
 661          */
 662         spin_lock_irq(&usbhid->lock);
 663         if (!--hid->open) {
 664                 spin_unlock_irq(&usbhid->lock);
 665                 hid_cancel_delayed_stuff(usbhid);
 666                 usb_kill_urb(usbhid->urbin);
 667                 usbhid->intf->needs_remote_wakeup = 0;
 668         } else {
 669                 spin_unlock_irq(&usbhid->lock);
 670         }
 671         mutex_unlock(&hid_open_mut);
 672 }
 673
 674 /*
 675  * Initialize all reports
 676  */
 677
 678 void usbhid_init_reports(struct hid_device *hid)
 679 {
 680         struct hid_report *report;
 681         struct usbhid_device *usbhid = hid->driver_data;
 682         int err, ret;
 683
 684         list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
 685                 usbhid_submit_report(hid, report, USB_DIR_IN);
 686
 687         list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
 688                 usbhid_submit_report(hid, report, USB_DIR_IN);
 689
 690         err = 0;
 691         ret = usbhid_wait_io(hid);
 692         while (ret) {
 693                 err |= ret;
 694                 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
 695                         usb_kill_urb(usbhid->urbctrl);
 696                 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
 697                         usb_kill_urb(usbhid->urbout);
 698                 ret = usbhid_wait_io(hid);
 699         }
 700
 701         if (err)
 702                 dev_warn(&hid->dev, "timeout initializing reports\n");
 703 }
 704
 705 /*
 706  * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
 707  */
 708 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
 709     unsigned int hid_code, struct hid_field **pfield)
 710 {
 711         struct hid_report *report;
 712         struct hid_field *field;
 713         struct hid_usage *usage;
 714         int i, j;
 715
 716         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
 717                 for (i = 0; i < report->maxfield; i++) {
 718                         field = report->field[i];
 719                         for (j = 0; j < field->maxusage; j++) {
 720                                 usage = &field->usage[j];
 721                                 if ((usage->hid & HID_USAGE_PAGE) == page &&
 722                                     (usage->hid & 0xFFFF) == hid_code) {
 723                                         *pfield = field;
 724                                         return j;
 725                                 }
 726                         }
 727                 }
 728         }
 729         return -1;
 730 }
 731
 732 void usbhid_set_leds(struct hid_device *hid)
 733 {
 734         struct hid_field *field;
 735         int offset;
 736
 737         if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
 738                 hid_set_field(field, offset, 0);
 739                 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
 740         }
 741 }
 742 EXPORT_SYMBOL_GPL(usbhid_set_leds);
 743
 744 /*
 745  * Traverse the supplied list of reports and find the longest
 746  */
 747 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
 748                 unsigned int *max)
 749 {
 750         struct hid_report *report;
 751         unsigned int size;
 752
 753         list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
 754                 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
 755                 if (*max < size)
 756                         *max = size;
 757         }
 758 }
 759
 760 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
 761 {
 762         struct usbhid_device *usbhid = hid->driver_data;
 763
 764         usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
 765                         &usbhid->inbuf_dma);
 766         usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
 767                         &usbhid->outbuf_dma);
 768         usbhid->cr = usb_buffer_alloc(dev, sizeof(*usbhid->cr), GFP_KERNEL,
 769                         &usbhid->cr_dma);
 770         usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
 771                         &usbhid->ctrlbuf_dma);
 772         if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
 773                         !usbhid->ctrlbuf)
 774                 return -1;
 775
 776         return 0;
 777 }
 778
 779 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
 780 {
 781         struct usbhid_device *usbhid = hid->driver_data;
 782         struct usb_device *dev = hid_to_usb_dev(hid);
 783         struct usb_interface *intf = usbhid->intf;
 784         struct usb_host_interface *interface = intf->cur_altsetting;
 785         int ret;
 786
 787         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 788                 HID_REQ_SET_REPORT,
 789                 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 790                 ((HID_OUTPUT_REPORT + 1) << 8) | *buf,
 791                 interface->desc.bInterfaceNumber, buf + 1, count - 1,
 792                 USB_CTRL_SET_TIMEOUT);
 793
 794         /* count also the report id */
 795         if (ret > 0)
 796                 ret++;
 797
 798         return ret;
 799 }
 800
 801 static void usbhid_restart_queues(struct usbhid_device *usbhid)
 802 {
 803         if (usbhid->urbout)
 804                 usbhid_restart_out_queue(usbhid);
 805         usbhid_restart_ctrl_queue(usbhid);
 806 }
 807
 808 static void __usbhid_restart_queues(struct work_struct *work)
 809 {
 810         struct usbhid_device *usbhid =
 811                 container_of(work, struct usbhid_device, restart_work);
 812         int r;
 813
 814         r = usb_autopm_get_interface(usbhid->intf);
 815         if (r < 0)
 816                 return;
 817         usb_autopm_put_interface(usbhid->intf);
 818 }
 819
 820 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
 821 {
 822         struct usbhid_device *usbhid = hid->driver_data;
 823
 824         usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
 825         usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
 826         usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
 827         usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
 828 }
 829
 830 static int usbhid_parse(struct hid_device *hid)
 831 {
 832         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
 833         struct usb_host_interface *interface = intf->cur_altsetting;
 834         struct usb_device *dev = interface_to_usbdev (intf);
 835         struct hid_descriptor *hdesc;
 836         u32 quirks = 0;
 837         unsigned int rsize = 0;
 838         char *rdesc;
 839         int ret, n;
 840
 841         quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
 842                         le16_to_cpu(dev->descriptor.idProduct));
 843
 844         if (quirks & HID_QUIRK_IGNORE)
 845                 return -ENODEV;
 846
 847         /* Many keyboards and mice don't like to be polled for reports,
 848          * so we will always set the HID_QUIRK_NOGET flag for them. */
 849         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
 850                 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
 851                         interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
 852                                 quirks |= HID_QUIRK_NOGET;
 853         }
 854
 855         if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
 856             (!interface->desc.bNumEndpoints ||
 857              usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
 858                 dbg_hid("class descriptor not present\n");
 859                 return -ENODEV;
 860         }
 861
 862         hid->version = le16_to_cpu(hdesc->bcdHID);
 863         hid->country = hdesc->bCountryCode;
 864
 865         for (n = 0; n < hdesc->bNumDescriptors; n++)
 866                 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
 867                         rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
 868
 869         if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
 870                 dbg_hid("weird size of report descriptor (%u)\n", rsize);
 871                 return -EINVAL;
 872         }
 873
 874         if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
 875                 dbg_hid("couldn't allocate rdesc memory\n");
 876                 return -ENOMEM;
 877         }
 878
 879         hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
 880
 881         ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
 882                         HID_DT_REPORT, rdesc, rsize);
 883         if (ret < 0) {
 884                 dbg_hid("reading report descriptor failed\n");
 885                 kfree(rdesc);
 886                 goto err;
 887         }
 888
 889         ret = hid_parse_report(hid, rdesc, rsize);
 890         kfree(rdesc);
 891         if (ret) {
 892                 dbg_hid("parsing report descriptor failed\n");
 893                 goto err;
 894         }
 895
 896         hid->quirks |= quirks;
 897
 898         return 0;
 899 err:
 900         return ret;
 901 }
 902
 903 static int usbhid_start(struct hid_device *hid)
 904 {
 905         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
 906         struct usb_host_interface *interface = intf->cur_altsetting;
 907         struct usb_device *dev = interface_to_usbdev(intf);
 908         struct usbhid_device *usbhid = hid->driver_data;
 909         unsigned int n, insize = 0;
 910         int ret;
 911
 912         clear_bit(HID_DISCONNECTED, &usbhid->iofl);
 913
 914         usbhid->bufsize = HID_MIN_BUFFER_SIZE;
 915         hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
 916         hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
 917         hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
 918
 919         if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
 920                 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
 921
 922         hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
 923
 924         if (insize > HID_MAX_BUFFER_SIZE)
 925                 insize = HID_MAX_BUFFER_SIZE;
 926
 927         if (hid_alloc_buffers(dev, hid)) {
 928                 ret = -ENOMEM;
 929                 goto fail;
 930         }
 931
 932         for (n = 0; n < interface->desc.bNumEndpoints; n++) {
 933                 struct usb_endpoint_descriptor *endpoint;
 934                 int pipe;
 935                 int interval;
 936
 937                 endpoint = &interface->endpoint[n].desc;
 938                 if (!usb_endpoint_xfer_int(endpoint))
 939                         continue;
 940
 941                 interval = endpoint->bInterval;
 942
 943                 /* Some vendors give fullspeed interval on highspeed devides */
 944                 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
 945                     dev->speed == USB_SPEED_HIGH) {
 946                         interval = fls(endpoint->bInterval*8);
 947                         printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
 948                                hid->name, endpoint->bInterval, interval);
 949                 }
 950
 951                 /* Change the polling interval of mice. */
 952                 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
 953                         interval = hid_mousepoll_interval;
 954
 955                 ret = -ENOMEM;
 956                 if (usb_endpoint_dir_in(endpoint)) {
 957                         if (usbhid->urbin)
 958                                 continue;
 959                         if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
 960                                 goto fail;
 961                         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 962                         usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
 963                                          hid_irq_in, hid, interval);
 964                         usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
 965                         usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 966                 } else {
 967                         if (usbhid->urbout)
 968                                 continue;
 969                         if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
 970                                 goto fail;
 971                         pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
 972                         usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
 973                                          hid_irq_out, hid, interval);
 974                         usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
 975                         usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 976                 }
 977         }
 978
 979         init_waitqueue_head(&usbhid->wait);
 980         INIT_WORK(&usbhid->reset_work, hid_reset);
 981         INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
 982         setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
 983
 984         spin_lock_init(&usbhid->lock);
 985
 986         usbhid->intf = intf;
 987         usbhid->ifnum = interface->desc.bInterfaceNumber;
 988
 989         usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
 990         if (!usbhid->urbctrl) {
 991                 ret = -ENOMEM;
 992                 goto fail;
 993         }
 994
 995         usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
 996                              usbhid->ctrlbuf, 1, hid_ctrl, hid);
 997         usbhid->urbctrl->setup_dma = usbhid->cr_dma;
 998         usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
 999         usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
1000
1001         usbhid_init_reports(hid);
1002
1003         set_bit(HID_STARTED, &usbhid->iofl);
1004
1005         /* Some keyboards don't work until their LEDs have been set.
1006          * Since BIOSes do set the LEDs, it must be safe for any device
1007          * that supports the keyboard boot protocol.
1008          */
1009         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1010                         interface->desc.bInterfaceProtocol ==
1011                                 USB_INTERFACE_PROTOCOL_KEYBOARD)
1012                 usbhid_set_leds(hid);
1013
1014         return 0;
1015
1016 fail:
1017         usb_free_urb(usbhid->urbin);
1018         usb_free_urb(usbhid->urbout);
1019         usb_free_urb(usbhid->urbctrl);
1020         usbhid->urbin = NULL;
1021         usbhid->urbout = NULL;
1022         usbhid->urbctrl = NULL;
1023         hid_free_buffers(dev, hid);
1024         return ret;
1025 }
1026
1027 static void usbhid_stop(struct hid_device *hid)
1028 {
1029         struct usbhid_device *usbhid = hid->driver_data;
1030
1031         if (WARN_ON(!usbhid))
1032                 return;
1033
1034         clear_bit(HID_STARTED, &usbhid->iofl);
1035         spin_lock_irq(&usbhid->lock);   /* Sync with error handler */
1036         set_bit(HID_DISCONNECTED, &usbhid->iofl);
1037         spin_unlock_irq(&usbhid->lock);
1038         usb_kill_urb(usbhid->urbin);
1039         usb_kill_urb(usbhid->urbout);
1040         usb_kill_urb(usbhid->urbctrl);
1041
1042         hid_cancel_delayed_stuff(usbhid);
1043
1044         if (hid->claimed & HID_CLAIMED_INPUT)
1045                 hidinput_disconnect(hid);
1046         if (hid->claimed & HID_CLAIMED_HIDDEV)
1047                 hiddev_disconnect(hid);
1048         if (hid->claimed & HID_CLAIMED_HIDRAW)
1049                 hidraw_disconnect(hid);
1050
1051         hid->claimed = 0;
1052
1053         usb_free_urb(usbhid->urbin);
1054         usb_free_urb(usbhid->urbctrl);
1055         usb_free_urb(usbhid->urbout);
1056         usbhid->urbin = NULL; /* don't mess up next start */
1057         usbhid->urbctrl = NULL;
1058         usbhid->urbout = NULL;
1059
1060         hid_free_buffers(hid_to_usb_dev(hid), hid);
1061 }
1062
1063 static int usbhid_power(struct hid_device *hid, int lvl)
1064 {
1065         int r = 0;
1066
1067         switch (lvl) {
1068         case PM_HINT_FULLON:
1069                 r = usbhid_get_power(hid);
1070                 break;
1071         case PM_HINT_NORMAL:
1072                 usbhid_put_power(hid);
1073                 break;
1074         }
1075         return r;
1076 }
1077
1078 static struct hid_ll_driver usb_hid_driver = {
1079         .parse = usbhid_parse,
1080         .start = usbhid_start,
1081         .stop = usbhid_stop,
1082         .open = usbhid_open,
1083         .close = usbhid_close,
1084         .power = usbhid_power,
1085         .hidinput_input_event = usb_hidinput_input_event,
1086 };
1087
1088 static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1089 {
1090         struct usb_host_interface *interface = intf->cur_altsetting;
1091         struct usb_device *dev = interface_to_usbdev(intf);
1092         struct usbhid_device *usbhid;
1093         struct hid_device *hid;
1094         unsigned int n, has_in = 0;
1095         size_t len;
1096         int ret;
1097
1098         dbg_hid("HID probe called for ifnum %d\n",
1099                         intf->altsetting->desc.bInterfaceNumber);
1100
1101         for (n = 0; n < interface->desc.bNumEndpoints; n++)
1102                 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1103                         has_in++;
1104         if (!has_in) {
1105                 dev_err(&intf->dev, "couldn't find an input interrupt "
1106                                 "endpoint\n");
1107                 return -ENODEV;
1108         }
1109
1110         hid = hid_allocate_device();
1111         if (IS_ERR(hid))
1112                 return PTR_ERR(hid);
1113
1114         usb_set_intfdata(intf, hid);
1115         hid->ll_driver = &usb_hid_driver;
1116         hid->hid_output_raw_report = usbhid_output_raw_report;
1117         hid->ff_init = hid_pidff_init;
1118 #ifdef CONFIG_USB_HIDDEV
1119         hid->hiddev_connect = hiddev_connect;
1120         hid->hiddev_hid_event = hiddev_hid_event;
1121         hid->hiddev_report_event = hiddev_report_event;
1122 #endif
1123         hid->dev.parent = &intf->dev;
1124         hid->bus = BUS_USB;
1125         hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1126         hid->product = le16_to_cpu(dev->descriptor.idProduct);
1127         hid->name[0] = 0;
1128         if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1129                         USB_INTERFACE_PROTOCOL_MOUSE)
1130                 hid->type = HID_TYPE_USBMOUSE;
1131
1132         if (dev->manufacturer)
1133                 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1134
1135         if (dev->product) {
1136                 if (dev->manufacturer)
1137                         strlcat(hid->name, " ", sizeof(hid->name));
1138                 strlcat(hid->name, dev->product, sizeof(hid->name));
1139         }
1140
1141         if (!strlen(hid->name))
1142                 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1143                          le16_to_cpu(dev->descriptor.idVendor),
1144                          le16_to_cpu(dev->descriptor.idProduct));
1145
1146         usb_make_path(dev, hid->phys, sizeof(hid->phys));
1147         strlcat(hid->phys, "/input", sizeof(hid->phys));
1148         len = strlen(hid->phys);
1149         if (len < sizeof(hid->phys) - 1)
1150                 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1151                          "%d", intf->altsetting[0].desc.bInterfaceNumber);
1152
1153         if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1154                 hid->uniq[0] = 0;
1155
1156         usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1157         if (usbhid == NULL) {
1158                 ret = -ENOMEM;
1159                 goto err;
1160         }
1161
1162         hid->driver_data = usbhid;
1163         usbhid->hid = hid;
1164
1165         ret = hid_add_device(hid);
1166         if (ret) {
1167                 if (ret != -ENODEV)
1168                         dev_err(&intf->dev, "can't add hid device: %d\n", ret);
1169                 goto err_free;
1170         }
1171
1172         return 0;
1173 err_free:
1174         kfree(usbhid);
1175 err:
1176         hid_destroy_device(hid);
1177         return ret;
1178 }
1179
1180 static void hid_disconnect(struct usb_interface *intf)
1181 {
1182         struct hid_device *hid = usb_get_intfdata(intf);
1183         struct usbhid_device *usbhid;
1184
1185         if (WARN_ON(!hid))
1186                 return;
1187
1188         usbhid = hid->driver_data;
1189         hid_destroy_device(hid);
1190         kfree(usbhid);
1191 }
1192
1193 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1194 {
1195         del_timer_sync(&usbhid->io_retry);
1196         cancel_work_sync(&usbhid->restart_work);
1197         cancel_work_sync(&usbhid->reset_work);
1198 }
1199
1200 static void hid_cease_io(struct usbhid_device *usbhid)
1201 {
1202         del_timer(&usbhid->io_retry);
1203         usb_kill_urb(usbhid->urbin);
1204         usb_kill_urb(usbhid->urbctrl);
1205         usb_kill_urb(usbhid->urbout);
1206 }
1207
1208 /* Treat USB reset pretty much the same as suspend/resume */
1209 static int hid_pre_reset(struct usb_interface *intf)
1210 {
1211         struct hid_device *hid = usb_get_intfdata(intf);
1212         struct usbhid_device *usbhid = hid->driver_data;
1213
1214         spin_lock_irq(&usbhid->lock);
1215         set_bit(HID_RESET_PENDING, &usbhid->iofl);
1216         spin_unlock_irq(&usbhid->lock);
1217         cancel_work_sync(&usbhid->restart_work);
1218         hid_cease_io(usbhid);
1219
1220         return 0;
1221 }
1222
1223 /* Same routine used for post_reset and reset_resume */
1224 static int hid_post_reset(struct usb_interface *intf)
1225 {
1226         struct usb_device *dev = interface_to_usbdev (intf);
1227         struct hid_device *hid = usb_get_intfdata(intf);
1228         struct usbhid_device *usbhid = hid->driver_data;
1229         int status;
1230
1231         spin_lock_irq(&usbhid->lock);
1232         clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1233         spin_unlock_irq(&usbhid->lock);
1234         hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1235         status = hid_start_in(hid);
1236         if (status < 0)
1237                 hid_io_error(hid);
1238         usbhid_restart_queues(usbhid);
1239
1240         return 0;
1241 }
1242
1243 int usbhid_get_power(struct hid_device *hid)
1244 {
1245         struct usbhid_device *usbhid = hid->driver_data;
1246
1247         return usb_autopm_get_interface(usbhid->intf);
1248 }
1249
1250 void usbhid_put_power(struct hid_device *hid)
1251 {
1252         struct usbhid_device *usbhid = hid->driver_data;
1253
1254         usb_autopm_put_interface(usbhid->intf);
1255 }
1256
1257
1258 #ifdef CONFIG_PM
1259 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1260 {
1261         struct hid_device *hid = usb_get_intfdata(intf);
1262         struct usbhid_device *usbhid = hid->driver_data;
1263         struct usb_device *udev = interface_to_usbdev(intf);
1264         int status;
1265
1266         if (udev->auto_pm) {
1267                 spin_lock_irq(&usbhid->lock);   /* Sync with error handler */
1268                 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1269                     && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1270                     && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1271                     && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1272                     && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1273                     && (!usbhid->ledcount || ignoreled))
1274                 {
1275                         set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1276                         spin_unlock_irq(&usbhid->lock);
1277                 } else {
1278                         usbhid_mark_busy(usbhid);
1279                         spin_unlock_irq(&usbhid->lock);
1280                         return -EBUSY;
1281                 }
1282
1283         } else {
1284                 spin_lock_irq(&usbhid->lock);
1285                 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1286                 spin_unlock_irq(&usbhid->lock);
1287                 if (usbhid_wait_io(hid) < 0)
1288                         return -EIO;
1289         }
1290
1291         if (!ignoreled && udev->auto_pm) {
1292                 spin_lock_irq(&usbhid->lock);
1293                 if (test_bit(HID_LED_ON, &usbhid->iofl)) {
1294                         spin_unlock_irq(&usbhid->lock);
1295                         usbhid_mark_busy(usbhid);
1296                         return -EBUSY;
1297                 }
1298                 spin_unlock_irq(&usbhid->lock);
1299         }
1300
1301         hid_cancel_delayed_stuff(usbhid);
1302         hid_cease_io(usbhid);
1303
1304         if (udev->auto_pm && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1305                 /* lost race against keypresses */
1306                 status = hid_start_in(hid);
1307                 if (status < 0)
1308                         hid_io_error(hid);
1309                 usbhid_mark_busy(usbhid);
1310                 return -EBUSY;
1311         }
1312         dev_dbg(&intf->dev, "suspend\n");
1313         return 0;
1314 }
1315
1316 static int hid_resume(struct usb_interface *intf)
1317 {
1318         struct hid_device *hid = usb_get_intfdata (intf);
1319         struct usbhid_device *usbhid = hid->driver_data;
1320         int status;
1321
1322         if (!test_bit(HID_STARTED, &usbhid->iofl))
1323                 return 0;
1324
1325         clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1326         usbhid_mark_busy(usbhid);
1327
1328         if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1329             test_bit(HID_RESET_PENDING, &usbhid->iofl))
1330                 schedule_work(&usbhid->reset_work);
1331         usbhid->retry_delay = 0;
1332         status = hid_start_in(hid);
1333         if (status < 0)
1334                 hid_io_error(hid);
1335         usbhid_restart_queues(usbhid);
1336
1337         dev_dbg(&intf->dev, "resume status %d\n", status);
1338         return 0;
1339 }
1340
1341 static int hid_reset_resume(struct usb_interface *intf)
1342 {
1343         struct hid_device *hid = usb_get_intfdata(intf);
1344         struct usbhid_device *usbhid = hid->driver_data;
1345
1346         clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1347         return hid_post_reset(intf);
1348 }
1349
1350 #endif /* CONFIG_PM */
1351
1352 static struct usb_device_id hid_usb_ids [] = {
1353         { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1354                 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1355         { }                                             /* Terminating entry */
1356 };
1357
1358 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1359
1360 static struct usb_driver hid_driver = {
1361         .name =         "usbhid",
1362         .probe =        hid_probe,
1363         .disconnect =   hid_disconnect,
1364 #ifdef CONFIG_PM
1365         .suspend =      hid_suspend,
1366         .resume =       hid_resume,
1367         .reset_resume = hid_reset_resume,
1368 #endif
1369         .pre_reset =    hid_pre_reset,
1370         .post_reset =   hid_post_reset,
1371         .id_table =     hid_usb_ids,
1372         .supports_autosuspend = 1,
1373 };
1374
1375 static const struct hid_device_id hid_usb_table[] = {
1376         { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1377         { }
1378 };
1379
1380 static struct hid_driver hid_usb_driver = {
1381         .name = "generic-usb",
1382         .id_table = hid_usb_table,
1383 };
1384
1385 static int __init hid_init(void)
1386 {
1387         int retval = -ENOMEM;
1388
1389         resumption_waker = create_freezeable_workqueue("usbhid_resumer");
1390         if (!resumption_waker)
1391                 goto no_queue;
1392         retval = hid_register_driver(&hid_usb_driver);
1393         if (retval)
1394                 goto hid_register_fail;
1395         retval = usbhid_quirks_init(quirks_param);
1396         if (retval)
1397                 goto usbhid_quirks_init_fail;
1398         retval = hiddev_init();
1399         if (retval)
1400                 goto hiddev_init_fail;
1401         retval = usb_register(&hid_driver);
1402         if (retval)
1403                 goto usb_register_fail;
1404         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1405                         DRIVER_DESC "\n");
1406
1407         return 0;
1408 usb_register_fail:
1409         hiddev_exit();
1410 hiddev_init_fail:
1411         usbhid_quirks_exit();
1412 usbhid_quirks_init_fail:
1413         hid_unregister_driver(&hid_usb_driver);
1414 hid_register_fail:
1415         destroy_workqueue(resumption_waker);
1416 no_queue:
1417         return retval;
1418 }
1419
1420 static void __exit hid_exit(void)
1421 {
1422         usb_deregister(&hid_driver);
1423         hiddev_exit();
1424         usbhid_quirks_exit();
1425         hid_unregister_driver(&hid_usb_driver);
1426         destroy_workqueue(resumption_waker);
1427 }
1428
1429 module_init(hid_init);
1430 module_exit(hid_exit);
1431
1432 MODULE_AUTHOR(DRIVER_AUTHOR);
1433 MODULE_DESCRIPTION(DRIVER_DESC);
1434 MODULE_LICENSE(DRIVER_LICENSE);