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_DESC "USB HID core driver"
  46 #define DRIVER_LICENSE "GPL"
  47
  48 /*
  49  * Module parameters.
  50  */
  51
  52 static unsigned int hid_mousepoll_interval;
  53 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
  54 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
  55
  56 static unsigned int ignoreled;
  57 module_param_named(ignoreled, ignoreled, uint, 0644);
  58 MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds");
  59
  60 /* Quirks specified at module load time */
  61 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
  62 module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
  63 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
  64                 " quirks=vendorID:productID:quirks"
  65                 " where vendorID, productID, and quirks are all in"
  66                 " 0x-prefixed hex");
  67 /*
  68  * Input submission and I/O error handler.
  69  */
  70 static DEFINE_MUTEX(hid_open_mut);
  71 static struct workqueue_struct *resumption_waker;
  72
  73 static void hid_io_error(struct hid_device *hid);
  74 static int hid_submit_out(struct hid_device *hid);
  75 static int hid_submit_ctrl(struct hid_device *hid);
  76 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid);
  77
  78 /* Start up the input URB */
  79 static int hid_start_in(struct hid_device *hid)
  80 {
  81         unsigned long flags;
  82         int rc = 0;
  83         struct usbhid_device *usbhid = hid->driver_data;
  84
  85         spin_lock_irqsave(&usbhid->lock, flags);
  86         if (hid->open > 0 &&
  87                         !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
  88                         !test_bit(HID_REPORTED_IDLE, &usbhid->iofl) &&
  89                         !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
  90                 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
  91                 if (rc != 0)
  92                         clear_bit(HID_IN_RUNNING, &usbhid->iofl);
  93         }
  94         spin_unlock_irqrestore(&usbhid->lock, flags);
  95         return rc;
  96 }
  97
  98 /* I/O retry timer routine */
  99 static void hid_retry_timeout(unsigned long _hid)
 100 {
 101         struct hid_device *hid = (struct hid_device *) _hid;
 102         struct usbhid_device *usbhid = hid->driver_data;
 103
 104         dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
 105         if (hid_start_in(hid))
 106                 hid_io_error(hid);
 107 }
 108
 109 /* Workqueue routine to reset the device or clear a halt */
 110 static void hid_reset(struct work_struct *work)
 111 {
 112         struct usbhid_device *usbhid =
 113                 container_of(work, struct usbhid_device, reset_work);
 114         struct hid_device *hid = usbhid->hid;
 115         int rc = 0;
 116
 117         if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
 118                 dev_dbg(&usbhid->intf->dev, "clear halt\n");
 119                 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
 120                 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
 121                 hid_start_in(hid);
 122         }
 123
 124         else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
 125                 dev_dbg(&usbhid->intf->dev, "resetting device\n");
 126                 rc = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
 127                 if (rc == 0) {
 128                         rc = usb_reset_device(hid_to_usb_dev(hid));
 129                         usb_unlock_device(hid_to_usb_dev(hid));
 130                 }
 131                 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
 132         }
 133
 134         switch (rc) {
 135         case 0:
 136                 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
 137                         hid_io_error(hid);
 138                 break;
 139         default:
 140                 err_hid("can't reset device, %s-%s/input%d, status %d",
 141                                 hid_to_usb_dev(hid)->bus->bus_name,
 142                                 hid_to_usb_dev(hid)->devpath,
 143                                 usbhid->ifnum, rc);
 144                 /* FALLTHROUGH */
 145         case -EHOSTUNREACH:
 146         case -ENODEV:
 147         case -EINTR:
 148                 break;
 149         }
 150 }
 151
 152 /* Main I/O error handler */
 153 static void hid_io_error(struct hid_device *hid)
 154 {
 155         unsigned long flags;
 156         struct usbhid_device *usbhid = hid->driver_data;
 157
 158         spin_lock_irqsave(&usbhid->lock, flags);
 159
 160         /* Stop when disconnected */
 161         if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
 162                 goto done;
 163
 164         /* If it has been a while since the last error, we'll assume
 165          * this a brand new error and reset the retry timeout. */
 166         if (time_after(jiffies, usbhid->stop_retry + HZ/2))
 167                 usbhid->retry_delay = 0;
 168
 169         /* When an error occurs, retry at increasing intervals */
 170         if (usbhid->retry_delay == 0) {
 171                 usbhid->retry_delay = 13;       /* Then 26, 52, 104, 104, ... */
 172                 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
 173         } else if (usbhid->retry_delay < 100)
 174                 usbhid->retry_delay *= 2;
 175
 176         if (time_after(jiffies, usbhid->stop_retry)) {
 177
 178                 /* Retries failed, so do a port reset */
 179                 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
 180                         schedule_work(&usbhid->reset_work);
 181                         goto done;
 182                 }
 183         }
 184
 185         mod_timer(&usbhid->io_retry,
 186                         jiffies + msecs_to_jiffies(usbhid->retry_delay));
 187 done:
 188         spin_unlock_irqrestore(&usbhid->lock, flags);
 189 }
 190
 191 static void usbhid_mark_busy(struct usbhid_device *usbhid)
 192 {
 193         struct usb_interface *intf = usbhid->intf;
 194
 195         usb_mark_last_busy(interface_to_usbdev(intf));
 196 }
 197
 198 static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
 199 {
 200         struct hid_device *hid = usb_get_intfdata(usbhid->intf);
 201         int kicked;
 202
 203         if (!hid)
 204                 return 0;
 205
 206         if ((kicked = (usbhid->outhead != usbhid->outtail))) {
 207                 dbg("Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
 208                 if (hid_submit_out(hid)) {
 209                         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 210                         wake_up(&usbhid->wait);
 211                 }
 212         }
 213         return kicked;
 214 }
 215
 216 static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
 217 {
 218         struct hid_device *hid = usb_get_intfdata(usbhid->intf);
 219         int kicked;
 220
 221         WARN_ON(hid == NULL);
 222         if (!hid)
 223                 return 0;
 224
 225         if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
 226                 dbg("Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
 227                 if (hid_submit_ctrl(hid)) {
 228                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 229                         wake_up(&usbhid->wait);
 230                 }
 231         }
 232         return kicked;
 233 }
 234
 235 /*
 236  * Input interrupt completion handler.
 237  */
 238
 239 static void hid_irq_in(struct urb *urb)
 240 {
 241         struct hid_device       *hid = urb->context;
 242         struct usbhid_device    *usbhid = hid->driver_data;
 243         int                     status;
 244
 245         switch (urb->status) {
 246         case 0:                 /* success */
 247                 usbhid_mark_busy(usbhid);
 248                 usbhid->retry_delay = 0;
 249                 hid_input_report(urb->context, HID_INPUT_REPORT,
 250                                  urb->transfer_buffer,
 251                                  urb->actual_length, 1);
 252                 /*
 253                  * autosuspend refused while keys are pressed
 254                  * because most keyboards don't wake up when
 255                  * a key is released
 256                  */
 257                 if (hid_check_keys_pressed(hid))
 258                         set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
 259                 else
 260                         clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
 261                 break;
 262         case -EPIPE:            /* stall */
 263                 usbhid_mark_busy(usbhid);
 264                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 265                 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
 266                 schedule_work(&usbhid->reset_work);
 267                 return;
 268         case -ECONNRESET:       /* unlink */
 269         case -ENOENT:
 270         case -ESHUTDOWN:        /* unplug */
 271                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 272                 return;
 273         case -EILSEQ:           /* protocol error or unplug */
 274         case -EPROTO:           /* protocol error or unplug */
 275         case -ETIME:            /* protocol error or unplug */
 276         case -ETIMEDOUT:        /* Should never happen, but... */
 277                 usbhid_mark_busy(usbhid);
 278                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 279                 hid_io_error(hid);
 280                 return;
 281         default:                /* error */
 282                 dev_warn(&urb->dev->dev, "input irq status %d  "
 283                                 "received\n", urb->status);
 284         }
 285
 286         status = usb_submit_urb(urb, GFP_ATOMIC);
 287         if (status) {
 288                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 289                 if (status != -EPERM) {
 290                         err_hid("can't resubmit intr, %s-%s/input%d, status %d",
 291                                         hid_to_usb_dev(hid)->bus->bus_name,
 292                                         hid_to_usb_dev(hid)->devpath,
 293                                         usbhid->ifnum, status);
 294                         hid_io_error(hid);
 295                 }
 296         }
 297 }
 298
 299 static int hid_submit_out(struct hid_device *hid)
 300 {
 301         struct hid_report *report;
 302         char *raw_report;
 303         struct usbhid_device *usbhid = hid->driver_data;
 304
 305         report = usbhid->out[usbhid->outtail].report;
 306         raw_report = usbhid->out[usbhid->outtail].raw_report;
 307
 308         if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
 309                 usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 310                 usbhid->urbout->dev = hid_to_usb_dev(hid);
 311                 memcpy(usbhid->outbuf, raw_report, usbhid->urbout->transfer_buffer_length);
 312                 kfree(raw_report);
 313
 314                 dbg_hid("submitting out urb\n");
 315
 316                 if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
 317                         err_hid("usb_submit_urb(out) failed");
 318                         return -1;
 319                 }
 320         } else {
 321                 /*
 322                  * queue work to wake up the device.
 323                  * as the work queue is freezeable, this is safe
 324                  * with respect to STD and STR
 325                  */
 326                 queue_work(resumption_waker, &usbhid->restart_work);
 327         }
 328
 329         return 0;
 330 }
 331
 332 static int hid_submit_ctrl(struct hid_device *hid)
 333 {
 334         struct hid_report *report;
 335         unsigned char dir;
 336         char *raw_report;
 337         int len;
 338         struct usbhid_device *usbhid = hid->driver_data;
 339
 340         report = usbhid->ctrl[usbhid->ctrltail].report;
 341         raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
 342         dir = usbhid->ctrl[usbhid->ctrltail].dir;
 343
 344         if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
 345                 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 346                 if (dir == USB_DIR_OUT) {
 347                         usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
 348                         usbhid->urbctrl->transfer_buffer_length = len;
 349                         memcpy(usbhid->ctrlbuf, raw_report, len);
 350                         kfree(raw_report);
 351                 } else {
 352                         int maxpacket, padlen;
 353
 354                         usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
 355                         maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
 356                         if (maxpacket > 0) {
 357                                 padlen = DIV_ROUND_UP(len, maxpacket);
 358                                 padlen *= maxpacket;
 359                                 if (padlen > usbhid->bufsize)
 360                                         padlen = usbhid->bufsize;
 361                         } else
 362                                 padlen = 0;
 363                         usbhid->urbctrl->transfer_buffer_length = padlen;
 364                 }
 365                 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
 366
 367                 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
 368                 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
 369                 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
 370                 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
 371                 usbhid->cr->wLength = cpu_to_le16(len);
 372
 373                 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
 374                         usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
 375                         usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
 376
 377                 if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
 378                         err_hid("usb_submit_urb(ctrl) failed");
 379                         return -1;
 380                 }
 381         } else {
 382                 /*
 383                  * queue work to wake up the device.
 384                  * as the work queue is freezeable, this is safe
 385                  * with respect to STD and STR
 386                  */
 387                 queue_work(resumption_waker, &usbhid->restart_work);
 388         }
 389
 390         return 0;
 391 }
 392
 393 /*
 394  * Output interrupt completion handler.
 395  */
 396
 397 static void hid_irq_out(struct urb *urb)
 398 {
 399         struct hid_device *hid = urb->context;
 400         struct usbhid_device *usbhid = hid->driver_data;
 401         unsigned long flags;
 402         int unplug = 0;
 403
 404         switch (urb->status) {
 405         case 0:                 /* success */
 406                 break;
 407         case -ESHUTDOWN:        /* unplug */
 408                 unplug = 1;
 409         case -EILSEQ:           /* protocol error or unplug */
 410         case -EPROTO:           /* protocol error or unplug */
 411         case -ECONNRESET:       /* unlink */
 412         case -ENOENT:
 413                 break;
 414         default:                /* error */
 415                 dev_warn(&urb->dev->dev, "output irq status %d "
 416                                 "received\n", urb->status);
 417         }
 418
 419         spin_lock_irqsave(&usbhid->lock, flags);
 420
 421         if (unplug)
 422                 usbhid->outtail = usbhid->outhead;
 423         else
 424                 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
 425
 426         if (usbhid->outhead != usbhid->outtail) {
 427                 if (hid_submit_out(hid)) {
 428                         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 429                         wake_up(&usbhid->wait);
 430                 }
 431                 spin_unlock_irqrestore(&usbhid->lock, flags);
 432                 return;
 433         }
 434
 435         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 436         spin_unlock_irqrestore(&usbhid->lock, flags);
 437         wake_up(&usbhid->wait);
 438 }
 439
 440 /*
 441  * Control pipe completion handler.
 442  */
 443
 444 static void hid_ctrl(struct urb *urb)
 445 {
 446         struct hid_device *hid = urb->context;
 447         struct usbhid_device *usbhid = hid->driver_data;
 448         int unplug = 0, status = urb->status;
 449
 450         spin_lock(&usbhid->lock);
 451
 452         switch (status) {
 453         case 0:                 /* success */
 454                 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
 455                         hid_input_report(urb->context,
 456                                 usbhid->ctrl[usbhid->ctrltail].report->type,
 457                                 urb->transfer_buffer, urb->actual_length, 0);
 458                 break;
 459         case -ESHUTDOWN:        /* unplug */
 460                 unplug = 1;
 461         case -EILSEQ:           /* protocol error or unplug */
 462         case -EPROTO:           /* protocol error or unplug */
 463         case -ECONNRESET:       /* unlink */
 464         case -ENOENT:
 465         case -EPIPE:            /* report not available */
 466                 break;
 467         default:                /* error */
 468                 dev_warn(&urb->dev->dev, "ctrl urb status %d "
 469                                 "received\n", status);
 470         }
 471
 472         if (unplug)
 473                 usbhid->ctrltail = usbhid->ctrlhead;
 474         else
 475                 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
 476
 477         if (usbhid->ctrlhead != usbhid->ctrltail) {
 478                 if (hid_submit_ctrl(hid)) {
 479                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 480                         wake_up(&usbhid->wait);
 481                 }
 482                 spin_unlock(&usbhid->lock);
 483                 return;
 484         }
 485
 486         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 487         spin_unlock(&usbhid->lock);
 488         wake_up(&usbhid->wait);
 489 }
 490
 491 static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
 492                                    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         ret = hid_parse_report(hid, rdesc, rsize);
 889         kfree(rdesc);
 890         if (ret) {
 891                 dbg_hid("parsing report descriptor failed\n");
 892                 goto err;
 893         }
 894
 895         hid->quirks |= quirks;
 896
 897         return 0;
 898 err:
 899         return ret;
 900 }
 901
 902 static int usbhid_start(struct hid_device *hid)
 903 {
 904         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
 905         struct usb_host_interface *interface = intf->cur_altsetting;
 906         struct usb_device *dev = interface_to_usbdev(intf);
 907         struct usbhid_device *usbhid = hid->driver_data;
 908         unsigned int n, insize = 0;
 909         int ret;
 910
 911         clear_bit(HID_DISCONNECTED, &usbhid->iofl);
 912
 913         usbhid->bufsize = HID_MIN_BUFFER_SIZE;
 914         hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
 915         hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
 916         hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
 917
 918         if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
 919                 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
 920
 921         hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
 922
 923         if (insize > HID_MAX_BUFFER_SIZE)
 924                 insize = HID_MAX_BUFFER_SIZE;
 925
 926         if (hid_alloc_buffers(dev, hid)) {
 927                 ret = -ENOMEM;
 928                 goto fail;
 929         }
 930
 931         for (n = 0; n < interface->desc.bNumEndpoints; n++) {
 932                 struct usb_endpoint_descriptor *endpoint;
 933                 int pipe;
 934                 int interval;
 935
 936                 endpoint = &interface->endpoint[n].desc;
 937                 if (!usb_endpoint_xfer_int(endpoint))
 938                         continue;
 939
 940                 interval = endpoint->bInterval;
 941
 942                 /* Some vendors give fullspeed interval on highspeed devides */
 943                 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
 944                     dev->speed == USB_SPEED_HIGH) {
 945                         interval = fls(endpoint->bInterval*8);
 946                         printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
 947                                hid->name, endpoint->bInterval, interval);
 948                 }
 949
 950                 /* Change the polling interval of mice. */
 951                 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
 952                         interval = hid_mousepoll_interval;
 953
 954                 ret = -ENOMEM;
 955                 if (usb_endpoint_dir_in(endpoint)) {
 956                         if (usbhid->urbin)
 957                                 continue;
 958                         if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
 959                                 goto fail;
 960                         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 961                         usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
 962                                          hid_irq_in, hid, interval);
 963                         usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
 964                         usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 965                 } else {
 966                         if (usbhid->urbout)
 967                                 continue;
 968                         if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
 969                                 goto fail;
 970                         pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
 971                         usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
 972                                          hid_irq_out, hid, interval);
 973                         usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
 974                         usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 975                 }
 976         }
 977
 978         init_waitqueue_head(&usbhid->wait);
 979         INIT_WORK(&usbhid->reset_work, hid_reset);
 980         INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
 981         setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
 982
 983         spin_lock_init(&usbhid->lock);
 984
 985         usbhid->intf = intf;
 986         usbhid->ifnum = interface->desc.bInterfaceNumber;
 987
 988         usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
 989         if (!usbhid->urbctrl) {
 990                 ret = -ENOMEM;
 991                 goto fail;
 992         }
 993
 994         usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
 995                              usbhid->ctrlbuf, 1, hid_ctrl, hid);
 996         usbhid->urbctrl->setup_dma = usbhid->cr_dma;
 997         usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
 998         usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
 999
1000         usbhid_init_reports(hid);
1001
1002         set_bit(HID_STARTED, &usbhid->iofl);
1003
1004         /* Some keyboards don't work until their LEDs have been set.
1005          * Since BIOSes do set the LEDs, it must be safe for any device
1006          * that supports the keyboard boot protocol.
1007          */
1008         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1009                         interface->desc.bInterfaceProtocol ==
1010                                 USB_INTERFACE_PROTOCOL_KEYBOARD)
1011                 usbhid_set_leds(hid);
1012
1013         return 0;
1014
1015 fail:
1016         usb_free_urb(usbhid->urbin);
1017         usb_free_urb(usbhid->urbout);
1018         usb_free_urb(usbhid->urbctrl);
1019         usbhid->urbin = NULL;
1020         usbhid->urbout = NULL;
1021         usbhid->urbctrl = NULL;
1022         hid_free_buffers(dev, hid);
1023         return ret;
1024 }
1025
1026 static void usbhid_stop(struct hid_device *hid)
1027 {
1028         struct usbhid_device *usbhid = hid->driver_data;
1029
1030         if (WARN_ON(!usbhid))
1031                 return;
1032
1033         clear_bit(HID_STARTED, &usbhid->iofl);
1034         spin_lock_irq(&usbhid->lock);   /* Sync with error handler */
1035         set_bit(HID_DISCONNECTED, &usbhid->iofl);
1036         spin_unlock_irq(&usbhid->lock);
1037         usb_kill_urb(usbhid->urbin);
1038         usb_kill_urb(usbhid->urbout);
1039         usb_kill_urb(usbhid->urbctrl);
1040
1041         hid_cancel_delayed_stuff(usbhid);
1042
1043         hid->claimed = 0;
1044
1045         usb_free_urb(usbhid->urbin);
1046         usb_free_urb(usbhid->urbctrl);
1047         usb_free_urb(usbhid->urbout);
1048         usbhid->urbin = NULL; /* don't mess up next start */
1049         usbhid->urbctrl = NULL;
1050         usbhid->urbout = NULL;
1051
1052         hid_free_buffers(hid_to_usb_dev(hid), hid);
1053 }
1054
1055 static int usbhid_power(struct hid_device *hid, int lvl)
1056 {
1057         int r = 0;
1058
1059         switch (lvl) {
1060         case PM_HINT_FULLON:
1061                 r = usbhid_get_power(hid);
1062                 break;
1063         case PM_HINT_NORMAL:
1064                 usbhid_put_power(hid);
1065                 break;
1066         }
1067         return r;
1068 }
1069
1070 static struct hid_ll_driver usb_hid_driver = {
1071         .parse = usbhid_parse,
1072         .start = usbhid_start,
1073         .stop = usbhid_stop,
1074         .open = usbhid_open,
1075         .close = usbhid_close,
1076         .power = usbhid_power,
1077         .hidinput_input_event = usb_hidinput_input_event,
1078 };
1079
1080 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1081 {
1082         struct usb_host_interface *interface = intf->cur_altsetting;
1083         struct usb_device *dev = interface_to_usbdev(intf);
1084         struct usbhid_device *usbhid;
1085         struct hid_device *hid;
1086         unsigned int n, has_in = 0;
1087         size_t len;
1088         int ret;
1089
1090         dbg_hid("HID probe called for ifnum %d\n",
1091                         intf->altsetting->desc.bInterfaceNumber);
1092
1093         for (n = 0; n < interface->desc.bNumEndpoints; n++)
1094                 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1095                         has_in++;
1096         if (!has_in) {
1097                 dev_err(&intf->dev, "couldn't find an input interrupt "
1098                                 "endpoint\n");
1099                 return -ENODEV;
1100         }
1101
1102         hid = hid_allocate_device();
1103         if (IS_ERR(hid))
1104                 return PTR_ERR(hid);
1105
1106         usb_set_intfdata(intf, hid);
1107         hid->ll_driver = &usb_hid_driver;
1108         hid->hid_output_raw_report = usbhid_output_raw_report;
1109         hid->ff_init = hid_pidff_init;
1110 #ifdef CONFIG_USB_HIDDEV
1111         hid->hiddev_connect = hiddev_connect;
1112         hid->hiddev_disconnect = hiddev_disconnect;
1113         hid->hiddev_hid_event = hiddev_hid_event;
1114         hid->hiddev_report_event = hiddev_report_event;
1115 #endif
1116         hid->dev.parent = &intf->dev;
1117         hid->bus = BUS_USB;
1118         hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1119         hid->product = le16_to_cpu(dev->descriptor.idProduct);
1120         hid->name[0] = 0;
1121         if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1122                         USB_INTERFACE_PROTOCOL_MOUSE)
1123                 hid->type = HID_TYPE_USBMOUSE;
1124
1125         if (dev->manufacturer)
1126                 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1127
1128         if (dev->product) {
1129                 if (dev->manufacturer)
1130                         strlcat(hid->name, " ", sizeof(hid->name));
1131                 strlcat(hid->name, dev->product, sizeof(hid->name));
1132         }
1133
1134         if (!strlen(hid->name))
1135                 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1136                          le16_to_cpu(dev->descriptor.idVendor),
1137                          le16_to_cpu(dev->descriptor.idProduct));
1138
1139         usb_make_path(dev, hid->phys, sizeof(hid->phys));
1140         strlcat(hid->phys, "/input", sizeof(hid->phys));
1141         len = strlen(hid->phys);
1142         if (len < sizeof(hid->phys) - 1)
1143                 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1144                          "%d", intf->altsetting[0].desc.bInterfaceNumber);
1145
1146         if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1147                 hid->uniq[0] = 0;
1148
1149         usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1150         if (usbhid == NULL) {
1151                 ret = -ENOMEM;
1152                 goto err;
1153         }
1154
1155         hid->driver_data = usbhid;
1156         usbhid->hid = hid;
1157
1158         ret = hid_add_device(hid);
1159         if (ret) {
1160                 if (ret != -ENODEV)
1161                         dev_err(&intf->dev, "can't add hid device: %d\n", ret);
1162                 goto err_free;
1163         }
1164
1165         return 0;
1166 err_free:
1167         kfree(usbhid);
1168 err:
1169         hid_destroy_device(hid);
1170         return ret;
1171 }
1172
1173 static void usbhid_disconnect(struct usb_interface *intf)
1174 {
1175         struct hid_device *hid = usb_get_intfdata(intf);
1176         struct usbhid_device *usbhid;
1177
1178         if (WARN_ON(!hid))
1179                 return;
1180
1181         usbhid = hid->driver_data;
1182         hid_destroy_device(hid);
1183         kfree(usbhid);
1184 }
1185
1186 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1187 {
1188         del_timer_sync(&usbhid->io_retry);
1189         cancel_work_sync(&usbhid->restart_work);
1190         cancel_work_sync(&usbhid->reset_work);
1191 }
1192
1193 static void hid_cease_io(struct usbhid_device *usbhid)
1194 {
1195         del_timer(&usbhid->io_retry);
1196         usb_kill_urb(usbhid->urbin);
1197         usb_kill_urb(usbhid->urbctrl);
1198         usb_kill_urb(usbhid->urbout);
1199 }
1200
1201 /* Treat USB reset pretty much the same as suspend/resume */
1202 static int hid_pre_reset(struct usb_interface *intf)
1203 {
1204         struct hid_device *hid = usb_get_intfdata(intf);
1205         struct usbhid_device *usbhid = hid->driver_data;
1206
1207         spin_lock_irq(&usbhid->lock);
1208         set_bit(HID_RESET_PENDING, &usbhid->iofl);
1209         spin_unlock_irq(&usbhid->lock);
1210         cancel_work_sync(&usbhid->restart_work);
1211         hid_cease_io(usbhid);
1212
1213         return 0;
1214 }
1215
1216 /* Same routine used for post_reset and reset_resume */
1217 static int hid_post_reset(struct usb_interface *intf)
1218 {
1219         struct usb_device *dev = interface_to_usbdev (intf);
1220         struct hid_device *hid = usb_get_intfdata(intf);
1221         struct usbhid_device *usbhid = hid->driver_data;
1222         int status;
1223
1224         spin_lock_irq(&usbhid->lock);
1225         clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1226         spin_unlock_irq(&usbhid->lock);
1227         hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1228         status = hid_start_in(hid);
1229         if (status < 0)
1230                 hid_io_error(hid);
1231         usbhid_restart_queues(usbhid);
1232
1233         return 0;
1234 }
1235
1236 int usbhid_get_power(struct hid_device *hid)
1237 {
1238         struct usbhid_device *usbhid = hid->driver_data;
1239
1240         return usb_autopm_get_interface(usbhid->intf);
1241 }
1242
1243 void usbhid_put_power(struct hid_device *hid)
1244 {
1245         struct usbhid_device *usbhid = hid->driver_data;
1246
1247         usb_autopm_put_interface(usbhid->intf);
1248 }
1249
1250
1251 #ifdef CONFIG_PM
1252 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1253 {
1254         struct hid_device *hid = usb_get_intfdata(intf);
1255         struct usbhid_device *usbhid = hid->driver_data;
1256         struct usb_device *udev = interface_to_usbdev(intf);
1257         int status;
1258
1259         if (udev->auto_pm) {
1260                 spin_lock_irq(&usbhid->lock);   /* Sync with error handler */
1261                 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1262                     && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1263                     && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1264                     && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1265                     && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1266                     && (!usbhid->ledcount || ignoreled))
1267                 {
1268                         set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1269                         spin_unlock_irq(&usbhid->lock);
1270                 } else {
1271                         usbhid_mark_busy(usbhid);
1272                         spin_unlock_irq(&usbhid->lock);
1273                         return -EBUSY;
1274                 }
1275
1276         } else {
1277                 spin_lock_irq(&usbhid->lock);
1278                 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1279                 spin_unlock_irq(&usbhid->lock);
1280                 if (usbhid_wait_io(hid) < 0)
1281                         return -EIO;
1282         }
1283
1284         if (!ignoreled && udev->auto_pm) {
1285                 spin_lock_irq(&usbhid->lock);
1286                 if (test_bit(HID_LED_ON, &usbhid->iofl)) {
1287                         spin_unlock_irq(&usbhid->lock);
1288                         usbhid_mark_busy(usbhid);
1289                         return -EBUSY;
1290                 }
1291                 spin_unlock_irq(&usbhid->lock);
1292         }
1293
1294         hid_cancel_delayed_stuff(usbhid);
1295         hid_cease_io(usbhid);
1296
1297         if (udev->auto_pm && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1298                 /* lost race against keypresses */
1299                 status = hid_start_in(hid);
1300                 if (status < 0)
1301                         hid_io_error(hid);
1302                 usbhid_mark_busy(usbhid);
1303                 return -EBUSY;
1304         }
1305         dev_dbg(&intf->dev, "suspend\n");
1306         return 0;
1307 }
1308
1309 static int hid_resume(struct usb_interface *intf)
1310 {
1311         struct hid_device *hid = usb_get_intfdata (intf);
1312         struct usbhid_device *usbhid = hid->driver_data;
1313         int status;
1314
1315         if (!test_bit(HID_STARTED, &usbhid->iofl))
1316                 return 0;
1317
1318         clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1319         usbhid_mark_busy(usbhid);
1320
1321         if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1322             test_bit(HID_RESET_PENDING, &usbhid->iofl))
1323                 schedule_work(&usbhid->reset_work);
1324         usbhid->retry_delay = 0;
1325         status = hid_start_in(hid);
1326         if (status < 0)
1327                 hid_io_error(hid);
1328         usbhid_restart_queues(usbhid);
1329
1330         dev_dbg(&intf->dev, "resume status %d\n", status);
1331         return 0;
1332 }
1333
1334 static int hid_reset_resume(struct usb_interface *intf)
1335 {
1336         struct hid_device *hid = usb_get_intfdata(intf);
1337         struct usbhid_device *usbhid = hid->driver_data;
1338
1339         clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1340         return hid_post_reset(intf);
1341 }
1342
1343 #endif /* CONFIG_PM */
1344
1345 static struct usb_device_id hid_usb_ids [] = {
1346         { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1347                 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1348         { }                                             /* Terminating entry */
1349 };
1350
1351 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1352
1353 static struct usb_driver hid_driver = {
1354         .name =         "usbhid",
1355         .probe =        usbhid_probe,
1356         .disconnect =   usbhid_disconnect,
1357 #ifdef CONFIG_PM
1358         .suspend =      hid_suspend,
1359         .resume =       hid_resume,
1360         .reset_resume = hid_reset_resume,
1361 #endif
1362         .pre_reset =    hid_pre_reset,
1363         .post_reset =   hid_post_reset,
1364         .id_table =     hid_usb_ids,
1365         .supports_autosuspend = 1,
1366 };
1367
1368 static const struct hid_device_id hid_usb_table[] = {
1369         { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1370         { }
1371 };
1372
1373 static struct hid_driver hid_usb_driver = {
1374         .name = "generic-usb",
1375         .id_table = hid_usb_table,
1376 };
1377
1378 static int __init hid_init(void)
1379 {
1380         int retval = -ENOMEM;
1381
1382         resumption_waker = create_freezeable_workqueue("usbhid_resumer");
1383         if (!resumption_waker)
1384                 goto no_queue;
1385         retval = hid_register_driver(&hid_usb_driver);
1386         if (retval)
1387                 goto hid_register_fail;
1388         retval = usbhid_quirks_init(quirks_param);
1389         if (retval)
1390                 goto usbhid_quirks_init_fail;
1391         retval = hiddev_init();
1392         if (retval)
1393                 goto hiddev_init_fail;
1394         retval = usb_register(&hid_driver);
1395         if (retval)
1396                 goto usb_register_fail;
1397         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1398                         DRIVER_DESC "\n");
1399
1400         return 0;
1401 usb_register_fail:
1402         hiddev_exit();
1403 hiddev_init_fail:
1404         usbhid_quirks_exit();
1405 usbhid_quirks_init_fail:
1406         hid_unregister_driver(&hid_usb_driver);
1407 hid_register_fail:
1408         destroy_workqueue(resumption_waker);
1409 no_queue:
1410         return retval;
1411 }
1412
1413 static void __exit hid_exit(void)
1414 {
1415         usb_deregister(&hid_driver);
1416         hiddev_exit();
1417         usbhid_quirks_exit();
1418         hid_unregister_driver(&hid_usb_driver);
1419         destroy_workqueue(resumption_waker);
1420 }
1421
1422 module_init(hid_init);
1423 module_exit(hid_exit);
1424
1425 MODULE_AUTHOR("Andreas Gal");
1426 MODULE_AUTHOR("Vojtech Pavlik");
1427 MODULE_AUTHOR("Jiri Kosina");
1428 MODULE_DESCRIPTION(DRIVER_DESC);
1429 MODULE_LICENSE(DRIVER_LICENSE);