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) 2006-2010 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_DESC "USB HID core driver"
  45 #define DRIVER_LICENSE "GPL"
  46
  47 /*
  48  * Module parameters.
  49  */
  50
  51 static unsigned int hid_mousepoll_interval;
  52 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
  53 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
  54
  55 static unsigned int ignoreled;
  56 module_param_named(ignoreled, ignoreled, uint, 0644);
  57 MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds");
  58
  59 /* Quirks specified at module load time */
  60 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
  61 module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
  62 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
  63                 " quirks=vendorID:productID:quirks"
  64                 " where vendorID, productID, and quirks are all in"
  65                 " 0x-prefixed hex");
  66 /*
  67  * Input submission and I/O error handler.
  68  */
  69 static DEFINE_MUTEX(hid_open_mut);
  70
  71 static void hid_io_error(struct hid_device *hid);
  72 static int hid_submit_out(struct hid_device *hid);
  73 static int hid_submit_ctrl(struct hid_device *hid);
  74 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid);
  75
  76 /* Start up the input URB */
  77 static int hid_start_in(struct hid_device *hid)
  78 {
  79         unsigned long flags;
  80         int rc = 0;
  81         struct usbhid_device *usbhid = hid->driver_data;
  82
  83         spin_lock_irqsave(&usbhid->lock, flags);
  84         if (hid->open > 0 &&
  85                         !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
  86                         !test_bit(HID_REPORTED_IDLE, &usbhid->iofl) &&
  87                         !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
  88                 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
  89                 if (rc != 0)
  90                         clear_bit(HID_IN_RUNNING, &usbhid->iofl);
  91         }
  92         spin_unlock_irqrestore(&usbhid->lock, flags);
  93         return rc;
  94 }
  95
  96 /* I/O retry timer routine */
  97 static void hid_retry_timeout(unsigned long _hid)
  98 {
  99         struct hid_device *hid = (struct hid_device *) _hid;
 100         struct usbhid_device *usbhid = hid->driver_data;
 101
 102         dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
 103         if (hid_start_in(hid))
 104                 hid_io_error(hid);
 105 }
 106
 107 /* Workqueue routine to reset the device or clear a halt */
 108 static void hid_reset(struct work_struct *work)
 109 {
 110         struct usbhid_device *usbhid =
 111                 container_of(work, struct usbhid_device, reset_work);
 112         struct hid_device *hid = usbhid->hid;
 113         int rc = 0;
 114
 115         if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
 116                 dev_dbg(&usbhid->intf->dev, "clear halt\n");
 117                 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
 118                 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
 119                 hid_start_in(hid);
 120         }
 121
 122         else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
 123                 dev_dbg(&usbhid->intf->dev, "resetting device\n");
 124                 rc = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
 125                 if (rc == 0) {
 126                         rc = usb_reset_device(hid_to_usb_dev(hid));
 127                         usb_unlock_device(hid_to_usb_dev(hid));
 128                 }
 129                 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
 130         }
 131
 132         switch (rc) {
 133         case 0:
 134                 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
 135                         hid_io_error(hid);
 136                 break;
 137         default:
 138                 hid_err(hid, "can't reset device, %s-%s/input%d, status %d\n",
 139                         hid_to_usb_dev(hid)->bus->bus_name,
 140                         hid_to_usb_dev(hid)->devpath,
 141                         usbhid->ifnum, rc);
 142                 /* FALLTHROUGH */
 143         case -EHOSTUNREACH:
 144         case -ENODEV:
 145         case -EINTR:
 146                 break;
 147         }
 148 }
 149
 150 /* Main I/O error handler */
 151 static void hid_io_error(struct hid_device *hid)
 152 {
 153         unsigned long flags;
 154         struct usbhid_device *usbhid = hid->driver_data;
 155
 156         spin_lock_irqsave(&usbhid->lock, flags);
 157
 158         /* Stop when disconnected */
 159         if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
 160                 goto done;
 161
 162         /* If it has been a while since the last error, we'll assume
 163          * this a brand new error and reset the retry timeout. */
 164         if (time_after(jiffies, usbhid->stop_retry + HZ/2))
 165                 usbhid->retry_delay = 0;
 166
 167         /* When an error occurs, retry at increasing intervals */
 168         if (usbhid->retry_delay == 0) {
 169                 usbhid->retry_delay = 13;       /* Then 26, 52, 104, 104, ... */
 170                 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
 171         } else if (usbhid->retry_delay < 100)
 172                 usbhid->retry_delay *= 2;
 173
 174         if (time_after(jiffies, usbhid->stop_retry)) {
 175
 176                 /* Retries failed, so do a port reset */
 177                 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
 178                         schedule_work(&usbhid->reset_work);
 179                         goto done;
 180                 }
 181         }
 182
 183         mod_timer(&usbhid->io_retry,
 184                         jiffies + msecs_to_jiffies(usbhid->retry_delay));
 185 done:
 186         spin_unlock_irqrestore(&usbhid->lock, flags);
 187 }
 188
 189 static void usbhid_mark_busy(struct usbhid_device *usbhid)
 190 {
 191         struct usb_interface *intf = usbhid->intf;
 192
 193         usb_mark_last_busy(interface_to_usbdev(intf));
 194 }
 195
 196 static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
 197 {
 198         struct hid_device *hid = usb_get_intfdata(usbhid->intf);
 199         int kicked;
 200
 201         if (!hid)
 202                 return 0;
 203
 204         if ((kicked = (usbhid->outhead != usbhid->outtail))) {
 205                 dbg("Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
 206                 if (hid_submit_out(hid)) {
 207                         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 208                         wake_up(&usbhid->wait);
 209                 }
 210         }
 211         return kicked;
 212 }
 213
 214 static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
 215 {
 216         struct hid_device *hid = usb_get_intfdata(usbhid->intf);
 217         int kicked;
 218
 219         WARN_ON(hid == NULL);
 220         if (!hid)
 221                 return 0;
 222
 223         if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
 224                 dbg("Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
 225                 if (hid_submit_ctrl(hid)) {
 226                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 227                         wake_up(&usbhid->wait);
 228                 }
 229         }
 230         return kicked;
 231 }
 232
 233 /*
 234  * Input interrupt completion handler.
 235  */
 236
 237 static void hid_irq_in(struct urb *urb)
 238 {
 239         struct hid_device       *hid = urb->context;
 240         struct usbhid_device    *usbhid = hid->driver_data;
 241         int                     status;
 242
 243         switch (urb->status) {
 244         case 0:                 /* success */
 245                 usbhid_mark_busy(usbhid);
 246                 usbhid->retry_delay = 0;
 247                 hid_input_report(urb->context, HID_INPUT_REPORT,
 248                                  urb->transfer_buffer,
 249                                  urb->actual_length, 1);
 250                 /*
 251                  * autosuspend refused while keys are pressed
 252                  * because most keyboards don't wake up when
 253                  * a key is released
 254                  */
 255                 if (hid_check_keys_pressed(hid))
 256                         set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
 257                 else
 258                         clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
 259                 break;
 260         case -EPIPE:            /* stall */
 261                 usbhid_mark_busy(usbhid);
 262                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 263                 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
 264                 schedule_work(&usbhid->reset_work);
 265                 return;
 266         case -ECONNRESET:       /* unlink */
 267         case -ENOENT:
 268         case -ESHUTDOWN:        /* unplug */
 269                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 270                 return;
 271         case -EILSEQ:           /* protocol error or unplug */
 272         case -EPROTO:           /* protocol error or unplug */
 273         case -ETIME:            /* protocol error or unplug */
 274         case -ETIMEDOUT:        /* Should never happen, but... */
 275                 usbhid_mark_busy(usbhid);
 276                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 277                 hid_io_error(hid);
 278                 return;
 279         default:                /* error */
 280                 hid_warn(urb->dev, "input irq status %d received\n",
 281                          urb->status);
 282         }
 283
 284         status = usb_submit_urb(urb, GFP_ATOMIC);
 285         if (status) {
 286                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 287                 if (status != -EPERM) {
 288                         hid_err(hid, "can't resubmit intr, %s-%s/input%d, status %d\n",
 289                                 hid_to_usb_dev(hid)->bus->bus_name,
 290                                 hid_to_usb_dev(hid)->devpath,
 291                                 usbhid->ifnum, status);
 292                         hid_io_error(hid);
 293                 }
 294         }
 295 }
 296
 297 static int hid_submit_out(struct hid_device *hid)
 298 {
 299         struct hid_report *report;
 300         char *raw_report;
 301         struct usbhid_device *usbhid = hid->driver_data;
 302         int r;
 303
 304         report = usbhid->out[usbhid->outtail].report;
 305         raw_report = usbhid->out[usbhid->outtail].raw_report;
 306
 307         r = usb_autopm_get_interface_async(usbhid->intf);
 308         if (r < 0)
 309                 return -1;
 310
 311         /*
 312          * if the device hasn't been woken, we leave the output
 313          * to resume()
 314          */
 315         if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
 316                 usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 317                 usbhid->urbout->dev = hid_to_usb_dev(hid);
 318                 memcpy(usbhid->outbuf, raw_report, usbhid->urbout->transfer_buffer_length);
 319                 kfree(raw_report);
 320
 321                 dbg_hid("submitting out urb\n");
 322
 323                 if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
 324                         hid_err(hid, "usb_submit_urb(out) failed\n");
 325                         usb_autopm_put_interface_async(usbhid->intf);
 326                         return -1;
 327                 }
 328                 usbhid->last_out = jiffies;
 329         }
 330
 331         return 0;
 332 }
 333
 334 static int hid_submit_ctrl(struct hid_device *hid)
 335 {
 336         struct hid_report *report;
 337         unsigned char dir;
 338         char *raw_report;
 339         int len, r;
 340         struct usbhid_device *usbhid = hid->driver_data;
 341
 342         report = usbhid->ctrl[usbhid->ctrltail].report;
 343         raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
 344         dir = usbhid->ctrl[usbhid->ctrltail].dir;
 345
 346         r = usb_autopm_get_interface_async(usbhid->intf);
 347         if (r < 0)
 348                 return -1;
 349         if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
 350                 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 351                 if (dir == USB_DIR_OUT) {
 352                         usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
 353                         usbhid->urbctrl->transfer_buffer_length = len;
 354                         memcpy(usbhid->ctrlbuf, raw_report, len);
 355                         kfree(raw_report);
 356                 } else {
 357                         int maxpacket, padlen;
 358
 359                         usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
 360                         maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
 361                         if (maxpacket > 0) {
 362                                 padlen = DIV_ROUND_UP(len, maxpacket);
 363                                 padlen *= maxpacket;
 364                                 if (padlen > usbhid->bufsize)
 365                                         padlen = usbhid->bufsize;
 366                         } else
 367                                 padlen = 0;
 368                         usbhid->urbctrl->transfer_buffer_length = padlen;
 369                 }
 370                 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
 371
 372                 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
 373                 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
 374                 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
 375                 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
 376                 usbhid->cr->wLength = cpu_to_le16(len);
 377
 378                 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
 379                         usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
 380                         usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
 381
 382                 if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
 383                         usb_autopm_put_interface_async(usbhid->intf);
 384                         hid_err(hid, "usb_submit_urb(ctrl) failed\n");
 385                         return -1;
 386                 }
 387                 usbhid->last_ctrl = jiffies;
 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                 hid_warn(urb->dev, "output irq status %d received\n",
 416                          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         usb_autopm_put_interface_async(usbhid->intf);
 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                 hid_warn(urb->dev, "ctrl urb status %d 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                 usb_autopm_put_interface_async(usbhid->intf);
 484                 return;
 485         }
 486
 487         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 488         spin_unlock(&usbhid->lock);
 489         usb_autopm_put_interface_async(usbhid->intf);
 490         wake_up(&usbhid->wait);
 491 }
 492
 493 static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
 494                                    unsigned char dir)
 495 {
 496         int head;
 497         struct usbhid_device *usbhid = hid->driver_data;
 498         int len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 499
 500         if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
 501                 return;
 502
 503         if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
 504                 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
 505                         hid_warn(hid, "output queue full\n");
 506                         return;
 507                 }
 508
 509                 usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC);
 510                 if (!usbhid->out[usbhid->outhead].raw_report) {
 511                         hid_warn(hid, "output queueing failed\n");
 512                         return;
 513                 }
 514                 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
 515                 usbhid->out[usbhid->outhead].report = report;
 516                 usbhid->outhead = head;
 517
 518                 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl)) {
 519                         if (hid_submit_out(hid))
 520                                 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 521                 } else {
 522                         /*
 523                          * the queue is known to run
 524                          * but an earlier request may be stuck
 525                          * we may need to time out
 526                          * no race because this is called under
 527                          * spinlock
 528                          */
 529                         if (time_after(jiffies, usbhid->last_out + HZ * 5))
 530                                 usb_unlink_urb(usbhid->urbout);
 531                 }
 532                 return;
 533         }
 534
 535         if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
 536                 hid_warn(hid, "control queue full\n");
 537                 return;
 538         }
 539
 540         if (dir == USB_DIR_OUT) {
 541                 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC);
 542                 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
 543                         hid_warn(hid, "control queueing failed\n");
 544                         return;
 545                 }
 546                 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
 547         }
 548         usbhid->ctrl[usbhid->ctrlhead].report = report;
 549         usbhid->ctrl[usbhid->ctrlhead].dir = dir;
 550         usbhid->ctrlhead = head;
 551
 552         if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl)) {
 553                 if (hid_submit_ctrl(hid))
 554                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 555         } else {
 556                 /*
 557                  * the queue is known to run
 558                  * but an earlier request may be stuck
 559                  * we may need to time out
 560                  * no race because this is called under
 561                  * spinlock
 562                  */
 563                 if (time_after(jiffies, usbhid->last_ctrl + HZ * 5))
 564                         usb_unlink_urb(usbhid->urbctrl);
 565         }
 566 }
 567
 568 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
 569 {
 570         struct usbhid_device *usbhid = hid->driver_data;
 571         unsigned long flags;
 572
 573         spin_lock_irqsave(&usbhid->lock, flags);
 574         __usbhid_submit_report(hid, report, dir);
 575         spin_unlock_irqrestore(&usbhid->lock, flags);
 576 }
 577 EXPORT_SYMBOL_GPL(usbhid_submit_report);
 578
 579 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
 580 {
 581         struct hid_device *hid = input_get_drvdata(dev);
 582         struct usbhid_device *usbhid = hid->driver_data;
 583         struct hid_field *field;
 584         unsigned long flags;
 585         int offset;
 586
 587         if (type == EV_FF)
 588                 return input_ff_event(dev, type, code, value);
 589
 590         if (type != EV_LED)
 591                 return -1;
 592
 593         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
 594                 hid_warn(dev, "event field not found\n");
 595                 return -1;
 596         }
 597
 598         hid_set_field(field, offset, value);
 599         if (value) {
 600                 spin_lock_irqsave(&usbhid->lock, flags);
 601                 usbhid->ledcount++;
 602                 spin_unlock_irqrestore(&usbhid->lock, flags);
 603         } else {
 604                 spin_lock_irqsave(&usbhid->lock, flags);
 605                 usbhid->ledcount--;
 606                 spin_unlock_irqrestore(&usbhid->lock, flags);
 607         }
 608         usbhid_submit_report(hid, field->report, USB_DIR_OUT);
 609
 610         return 0;
 611 }
 612
 613 int usbhid_wait_io(struct hid_device *hid)
 614 {
 615         struct usbhid_device *usbhid = hid->driver_data;
 616
 617         if (!wait_event_timeout(usbhid->wait,
 618                                 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
 619                                 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
 620                                         10*HZ)) {
 621                 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
 622                 return -1;
 623         }
 624
 625         return 0;
 626 }
 627 EXPORT_SYMBOL_GPL(usbhid_wait_io);
 628
 629 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
 630 {
 631         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 632                 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
 633                 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
 634 }
 635
 636 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
 637                 unsigned char type, void *buf, int size)
 638 {
 639         int result, retries = 4;
 640
 641         memset(buf, 0, size);
 642
 643         do {
 644                 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 645                                 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
 646                                 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
 647                 retries--;
 648         } while (result < size && retries);
 649         return result;
 650 }
 651
 652 int usbhid_open(struct hid_device *hid)
 653 {
 654         struct usbhid_device *usbhid = hid->driver_data;
 655         int res;
 656
 657         mutex_lock(&hid_open_mut);
 658         if (!hid->open++) {
 659                 res = usb_autopm_get_interface(usbhid->intf);
 660                 /* the device must be awake to reliably request remote wakeup */
 661                 if (res < 0) {
 662                         hid->open--;
 663                         mutex_unlock(&hid_open_mut);
 664                         return -EIO;
 665                 }
 666                 usbhid->intf->needs_remote_wakeup = 1;
 667                 if (hid_start_in(hid))
 668                         hid_io_error(hid);
 669
 670                 usb_autopm_put_interface(usbhid->intf);
 671         }
 672         mutex_unlock(&hid_open_mut);
 673         return 0;
 674 }
 675
 676 void usbhid_close(struct hid_device *hid)
 677 {
 678         struct usbhid_device *usbhid = hid->driver_data;
 679
 680         mutex_lock(&hid_open_mut);
 681
 682         /* protecting hid->open to make sure we don't restart
 683          * data acquistion due to a resumption we no longer
 684          * care about
 685          */
 686         spin_lock_irq(&usbhid->lock);
 687         if (!--hid->open) {
 688                 spin_unlock_irq(&usbhid->lock);
 689                 hid_cancel_delayed_stuff(usbhid);
 690                 usb_kill_urb(usbhid->urbin);
 691                 usbhid->intf->needs_remote_wakeup = 0;
 692         } else {
 693                 spin_unlock_irq(&usbhid->lock);
 694         }
 695         mutex_unlock(&hid_open_mut);
 696 }
 697
 698 /*
 699  * Initialize all reports
 700  */
 701
 702 void usbhid_init_reports(struct hid_device *hid)
 703 {
 704         struct hid_report *report;
 705         struct usbhid_device *usbhid = hid->driver_data;
 706         int err, ret;
 707
 708         list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
 709                 usbhid_submit_report(hid, report, USB_DIR_IN);
 710
 711         list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
 712                 usbhid_submit_report(hid, report, USB_DIR_IN);
 713
 714         err = 0;
 715         ret = usbhid_wait_io(hid);
 716         while (ret) {
 717                 err |= ret;
 718                 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
 719                         usb_kill_urb(usbhid->urbctrl);
 720                 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
 721                         usb_kill_urb(usbhid->urbout);
 722                 ret = usbhid_wait_io(hid);
 723         }
 724
 725         if (err)
 726                 hid_warn(hid, "timeout initializing reports\n");
 727 }
 728
 729 /*
 730  * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
 731  */
 732 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
 733     unsigned int hid_code, struct hid_field **pfield)
 734 {
 735         struct hid_report *report;
 736         struct hid_field *field;
 737         struct hid_usage *usage;
 738         int i, j;
 739
 740         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
 741                 for (i = 0; i < report->maxfield; i++) {
 742                         field = report->field[i];
 743                         for (j = 0; j < field->maxusage; j++) {
 744                                 usage = &field->usage[j];
 745                                 if ((usage->hid & HID_USAGE_PAGE) == page &&
 746                                     (usage->hid & 0xFFFF) == hid_code) {
 747                                         *pfield = field;
 748                                         return j;
 749                                 }
 750                         }
 751                 }
 752         }
 753         return -1;
 754 }
 755
 756 void usbhid_set_leds(struct hid_device *hid)
 757 {
 758         struct hid_field *field;
 759         int offset;
 760
 761         if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
 762                 hid_set_field(field, offset, 0);
 763                 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
 764         }
 765 }
 766 EXPORT_SYMBOL_GPL(usbhid_set_leds);
 767
 768 /*
 769  * Traverse the supplied list of reports and find the longest
 770  */
 771 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
 772                 unsigned int *max)
 773 {
 774         struct hid_report *report;
 775         unsigned int size;
 776
 777         list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
 778                 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
 779                 if (*max < size)
 780                         *max = size;
 781         }
 782 }
 783
 784 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
 785 {
 786         struct usbhid_device *usbhid = hid->driver_data;
 787
 788         usbhid->inbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
 789                         &usbhid->inbuf_dma);
 790         usbhid->outbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
 791                         &usbhid->outbuf_dma);
 792         usbhid->cr = kmalloc(sizeof(*usbhid->cr), GFP_KERNEL);
 793         usbhid->ctrlbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
 794                         &usbhid->ctrlbuf_dma);
 795         if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
 796                         !usbhid->ctrlbuf)
 797                 return -1;
 798
 799         return 0;
 800 }
 801
 802 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count,
 803                 unsigned char report_type)
 804 {
 805         struct usbhid_device *usbhid = hid->driver_data;
 806         struct usb_device *dev = hid_to_usb_dev(hid);
 807         struct usb_interface *intf = usbhid->intf;
 808         struct usb_host_interface *interface = intf->cur_altsetting;
 809         int ret;
 810
 811         if (usbhid->urbout && report_type != HID_FEATURE_REPORT) {
 812                 int actual_length;
 813                 int skipped_report_id = 0;
 814
 815                 if (buf[0] == 0x0) {
 816                         /* Don't send the Report ID */
 817                         buf++;
 818                         count--;
 819                         skipped_report_id = 1;
 820                 }
 821                 ret = usb_interrupt_msg(dev, usbhid->urbout->pipe,
 822                         buf, count, &actual_length,
 823                         USB_CTRL_SET_TIMEOUT);
 824                 /* return the number of bytes transferred */
 825                 if (ret == 0) {
 826                         ret = actual_length;
 827                         /* count also the report id */
 828                         if (skipped_report_id)
 829                                 ret++;
 830                 }
 831         } else {
 832                 int skipped_report_id = 0;
 833                 int report_id = buf[0];
 834                 if (buf[0] == 0x0) {
 835                         /* Don't send the Report ID */
 836                         buf++;
 837                         count--;
 838                         skipped_report_id = 1;
 839                 }
 840                 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 841                         HID_REQ_SET_REPORT,
 842                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 843                         ((report_type + 1) << 8) | report_id,
 844                         interface->desc.bInterfaceNumber, buf, count,
 845                         USB_CTRL_SET_TIMEOUT);
 846                 /* count also the report id, if this was a numbered report. */
 847                 if (ret > 0 && skipped_report_id)
 848                         ret++;
 849         }
 850
 851         return ret;
 852 }
 853
 854 static void usbhid_restart_queues(struct usbhid_device *usbhid)
 855 {
 856         if (usbhid->urbout)
 857                 usbhid_restart_out_queue(usbhid);
 858         usbhid_restart_ctrl_queue(usbhid);
 859 }
 860
 861 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
 862 {
 863         struct usbhid_device *usbhid = hid->driver_data;
 864
 865         usb_free_coherent(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
 866         usb_free_coherent(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
 867         kfree(usbhid->cr);
 868         usb_free_coherent(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
 869 }
 870
 871 static int usbhid_parse(struct hid_device *hid)
 872 {
 873         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
 874         struct usb_host_interface *interface = intf->cur_altsetting;
 875         struct usb_device *dev = interface_to_usbdev (intf);
 876         struct hid_descriptor *hdesc;
 877         u32 quirks = 0;
 878         unsigned int rsize = 0;
 879         char *rdesc;
 880         int ret, n;
 881
 882         quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
 883                         le16_to_cpu(dev->descriptor.idProduct));
 884
 885         if (quirks & HID_QUIRK_IGNORE)
 886                 return -ENODEV;
 887
 888         /* Many keyboards and mice don't like to be polled for reports,
 889          * so we will always set the HID_QUIRK_NOGET flag for them. */
 890         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
 891                 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
 892                         interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
 893                                 quirks |= HID_QUIRK_NOGET;
 894         }
 895
 896         if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
 897             (!interface->desc.bNumEndpoints ||
 898              usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
 899                 dbg_hid("class descriptor not present\n");
 900                 return -ENODEV;
 901         }
 902
 903         hid->version = le16_to_cpu(hdesc->bcdHID);
 904         hid->country = hdesc->bCountryCode;
 905
 906         for (n = 0; n < hdesc->bNumDescriptors; n++)
 907                 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
 908                         rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
 909
 910         if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
 911                 dbg_hid("weird size of report descriptor (%u)\n", rsize);
 912                 return -EINVAL;
 913         }
 914
 915         if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
 916                 dbg_hid("couldn't allocate rdesc memory\n");
 917                 return -ENOMEM;
 918         }
 919
 920         hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
 921
 922         ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
 923                         HID_DT_REPORT, rdesc, rsize);
 924         if (ret < 0) {
 925                 dbg_hid("reading report descriptor failed\n");
 926                 kfree(rdesc);
 927                 goto err;
 928         }
 929
 930         ret = hid_parse_report(hid, rdesc, rsize);
 931         kfree(rdesc);
 932         if (ret) {
 933                 dbg_hid("parsing report descriptor failed\n");
 934                 goto err;
 935         }
 936
 937         hid->quirks |= quirks;
 938
 939         return 0;
 940 err:
 941         return ret;
 942 }
 943
 944 static int usbhid_start(struct hid_device *hid)
 945 {
 946         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
 947         struct usb_host_interface *interface = intf->cur_altsetting;
 948         struct usb_device *dev = interface_to_usbdev(intf);
 949         struct usbhid_device *usbhid = hid->driver_data;
 950         unsigned int n, insize = 0;
 951         int ret;
 952
 953         clear_bit(HID_DISCONNECTED, &usbhid->iofl);
 954
 955         usbhid->bufsize = HID_MIN_BUFFER_SIZE;
 956         hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
 957         hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
 958         hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
 959
 960         if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
 961                 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
 962
 963         hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
 964
 965         if (insize > HID_MAX_BUFFER_SIZE)
 966                 insize = HID_MAX_BUFFER_SIZE;
 967
 968         if (hid_alloc_buffers(dev, hid)) {
 969                 ret = -ENOMEM;
 970                 goto fail;
 971         }
 972
 973         for (n = 0; n < interface->desc.bNumEndpoints; n++) {
 974                 struct usb_endpoint_descriptor *endpoint;
 975                 int pipe;
 976                 int interval;
 977
 978                 endpoint = &interface->endpoint[n].desc;
 979                 if (!usb_endpoint_xfer_int(endpoint))
 980                         continue;
 981
 982                 interval = endpoint->bInterval;
 983
 984                 /* Some vendors give fullspeed interval on highspeed devides */
 985                 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
 986                     dev->speed == USB_SPEED_HIGH) {
 987                         interval = fls(endpoint->bInterval*8);
 988                         printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
 989                                hid->name, endpoint->bInterval, interval);
 990                 }
 991
 992                 /* Change the polling interval of mice. */
 993                 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
 994                         interval = hid_mousepoll_interval;
 995
 996                 ret = -ENOMEM;
 997                 if (usb_endpoint_dir_in(endpoint)) {
 998                         if (usbhid->urbin)
 999                                 continue;
1000                         if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
1001                                 goto fail;
1002                         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
1003                         usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
1004                                          hid_irq_in, hid, interval);
1005                         usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
1006                         usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1007                 } else {
1008                         if (usbhid->urbout)
1009                                 continue;
1010                         if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
1011                                 goto fail;
1012                         pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
1013                         usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
1014                                          hid_irq_out, hid, interval);
1015                         usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
1016                         usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1017                 }
1018         }
1019
1020         usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
1021         if (!usbhid->urbctrl) {
1022                 ret = -ENOMEM;
1023                 goto fail;
1024         }
1025
1026         usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
1027                              usbhid->ctrlbuf, 1, hid_ctrl, hid);
1028         usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
1029         usbhid->urbctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1030
1031         if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS))
1032                 usbhid_init_reports(hid);
1033
1034         set_bit(HID_STARTED, &usbhid->iofl);
1035
1036         /* Some keyboards don't work until their LEDs have been set.
1037          * Since BIOSes do set the LEDs, it must be safe for any device
1038          * that supports the keyboard boot protocol.
1039          * In addition, enable remote wakeup by default for all keyboard
1040          * devices supporting the boot protocol.
1041          */
1042         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1043                         interface->desc.bInterfaceProtocol ==
1044                                 USB_INTERFACE_PROTOCOL_KEYBOARD) {
1045                 usbhid_set_leds(hid);
1046                 device_set_wakeup_enable(&dev->dev, 1);
1047         }
1048         return 0;
1049
1050 fail:
1051         usb_free_urb(usbhid->urbin);
1052         usb_free_urb(usbhid->urbout);
1053         usb_free_urb(usbhid->urbctrl);
1054         usbhid->urbin = NULL;
1055         usbhid->urbout = NULL;
1056         usbhid->urbctrl = NULL;
1057         hid_free_buffers(dev, hid);
1058         return ret;
1059 }
1060
1061 static void usbhid_stop(struct hid_device *hid)
1062 {
1063         struct usbhid_device *usbhid = hid->driver_data;
1064
1065         if (WARN_ON(!usbhid))
1066                 return;
1067
1068         clear_bit(HID_STARTED, &usbhid->iofl);
1069         spin_lock_irq(&usbhid->lock);   /* Sync with error handler */
1070         set_bit(HID_DISCONNECTED, &usbhid->iofl);
1071         spin_unlock_irq(&usbhid->lock);
1072         usb_kill_urb(usbhid->urbin);
1073         usb_kill_urb(usbhid->urbout);
1074         usb_kill_urb(usbhid->urbctrl);
1075
1076         hid_cancel_delayed_stuff(usbhid);
1077
1078         hid->claimed = 0;
1079
1080         usb_free_urb(usbhid->urbin);
1081         usb_free_urb(usbhid->urbctrl);
1082         usb_free_urb(usbhid->urbout);
1083         usbhid->urbin = NULL; /* don't mess up next start */
1084         usbhid->urbctrl = NULL;
1085         usbhid->urbout = NULL;
1086
1087         hid_free_buffers(hid_to_usb_dev(hid), hid);
1088 }
1089
1090 static int usbhid_power(struct hid_device *hid, int lvl)
1091 {
1092         int r = 0;
1093
1094         switch (lvl) {
1095         case PM_HINT_FULLON:
1096                 r = usbhid_get_power(hid);
1097                 break;
1098         case PM_HINT_NORMAL:
1099                 usbhid_put_power(hid);
1100                 break;
1101         }
1102         return r;
1103 }
1104
1105 static struct hid_ll_driver usb_hid_driver = {
1106         .parse = usbhid_parse,
1107         .start = usbhid_start,
1108         .stop = usbhid_stop,
1109         .open = usbhid_open,
1110         .close = usbhid_close,
1111         .power = usbhid_power,
1112         .hidinput_input_event = usb_hidinput_input_event,
1113 };
1114
1115 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1116 {
1117         struct usb_host_interface *interface = intf->cur_altsetting;
1118         struct usb_device *dev = interface_to_usbdev(intf);
1119         struct usbhid_device *usbhid;
1120         struct hid_device *hid;
1121         unsigned int n, has_in = 0;
1122         size_t len;
1123         int ret;
1124
1125         dbg_hid("HID probe called for ifnum %d\n",
1126                         intf->altsetting->desc.bInterfaceNumber);
1127
1128         for (n = 0; n < interface->desc.bNumEndpoints; n++)
1129                 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1130                         has_in++;
1131         if (!has_in) {
1132                 hid_err(intf, "couldn't find an input interrupt endpoint\n");
1133                 return -ENODEV;
1134         }
1135
1136         hid = hid_allocate_device();
1137         if (IS_ERR(hid))
1138                 return PTR_ERR(hid);
1139
1140         usb_set_intfdata(intf, hid);
1141         hid->ll_driver = &usb_hid_driver;
1142         hid->hid_output_raw_report = usbhid_output_raw_report;
1143         hid->ff_init = hid_pidff_init;
1144 #ifdef CONFIG_USB_HIDDEV
1145         hid->hiddev_connect = hiddev_connect;
1146         hid->hiddev_disconnect = hiddev_disconnect;
1147         hid->hiddev_hid_event = hiddev_hid_event;
1148         hid->hiddev_report_event = hiddev_report_event;
1149 #endif
1150         hid->dev.parent = &intf->dev;
1151         hid->bus = BUS_USB;
1152         hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1153         hid->product = le16_to_cpu(dev->descriptor.idProduct);
1154         hid->name[0] = 0;
1155         hid->quirks = usbhid_lookup_quirk(hid->vendor, hid->product);
1156         if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1157                         USB_INTERFACE_PROTOCOL_MOUSE)
1158                 hid->type = HID_TYPE_USBMOUSE;
1159
1160         if (dev->manufacturer)
1161                 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1162
1163         if (dev->product) {
1164                 if (dev->manufacturer)
1165                         strlcat(hid->name, " ", sizeof(hid->name));
1166                 strlcat(hid->name, dev->product, sizeof(hid->name));
1167         }
1168
1169         if (!strlen(hid->name))
1170                 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1171                          le16_to_cpu(dev->descriptor.idVendor),
1172                          le16_to_cpu(dev->descriptor.idProduct));
1173
1174         usb_make_path(dev, hid->phys, sizeof(hid->phys));
1175         strlcat(hid->phys, "/input", sizeof(hid->phys));
1176         len = strlen(hid->phys);
1177         if (len < sizeof(hid->phys) - 1)
1178                 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1179                          "%d", intf->altsetting[0].desc.bInterfaceNumber);
1180
1181         if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1182                 hid->uniq[0] = 0;
1183
1184         usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1185         if (usbhid == NULL) {
1186                 ret = -ENOMEM;
1187                 goto err;
1188         }
1189
1190         hid->driver_data = usbhid;
1191         usbhid->hid = hid;
1192         usbhid->intf = intf;
1193         usbhid->ifnum = interface->desc.bInterfaceNumber;
1194
1195         init_waitqueue_head(&usbhid->wait);
1196         INIT_WORK(&usbhid->reset_work, hid_reset);
1197         setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
1198         spin_lock_init(&usbhid->lock);
1199
1200         ret = hid_add_device(hid);
1201         if (ret) {
1202                 if (ret != -ENODEV)
1203                         hid_err(intf, "can't add hid device: %d\n", ret);
1204                 goto err_free;
1205         }
1206
1207         return 0;
1208 err_free:
1209         kfree(usbhid);
1210 err:
1211         hid_destroy_device(hid);
1212         return ret;
1213 }
1214
1215 static void usbhid_disconnect(struct usb_interface *intf)
1216 {
1217         struct hid_device *hid = usb_get_intfdata(intf);
1218         struct usbhid_device *usbhid;
1219
1220         if (WARN_ON(!hid))
1221                 return;
1222
1223         usbhid = hid->driver_data;
1224         hid_destroy_device(hid);
1225         kfree(usbhid);
1226 }
1227
1228 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1229 {
1230         del_timer_sync(&usbhid->io_retry);
1231         cancel_work_sync(&usbhid->reset_work);
1232 }
1233
1234 static void hid_cease_io(struct usbhid_device *usbhid)
1235 {
1236         del_timer(&usbhid->io_retry);
1237         usb_kill_urb(usbhid->urbin);
1238         usb_kill_urb(usbhid->urbctrl);
1239         usb_kill_urb(usbhid->urbout);
1240 }
1241
1242 /* Treat USB reset pretty much the same as suspend/resume */
1243 static int hid_pre_reset(struct usb_interface *intf)
1244 {
1245         struct hid_device *hid = usb_get_intfdata(intf);
1246         struct usbhid_device *usbhid = hid->driver_data;
1247
1248         spin_lock_irq(&usbhid->lock);
1249         set_bit(HID_RESET_PENDING, &usbhid->iofl);
1250         spin_unlock_irq(&usbhid->lock);
1251         hid_cease_io(usbhid);
1252
1253         return 0;
1254 }
1255
1256 /* Same routine used for post_reset and reset_resume */
1257 static int hid_post_reset(struct usb_interface *intf)
1258 {
1259         struct usb_device *dev = interface_to_usbdev (intf);
1260         struct hid_device *hid = usb_get_intfdata(intf);
1261         struct usbhid_device *usbhid = hid->driver_data;
1262         int status;
1263
1264         spin_lock_irq(&usbhid->lock);
1265         clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1266         spin_unlock_irq(&usbhid->lock);
1267         hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1268         status = hid_start_in(hid);
1269         if (status < 0)
1270                 hid_io_error(hid);
1271         usbhid_restart_queues(usbhid);
1272
1273         return 0;
1274 }
1275
1276 int usbhid_get_power(struct hid_device *hid)
1277 {
1278         struct usbhid_device *usbhid = hid->driver_data;
1279
1280         return usb_autopm_get_interface(usbhid->intf);
1281 }
1282
1283 void usbhid_put_power(struct hid_device *hid)
1284 {
1285         struct usbhid_device *usbhid = hid->driver_data;
1286
1287         usb_autopm_put_interface(usbhid->intf);
1288 }
1289
1290
1291 #ifdef CONFIG_PM
1292 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1293 {
1294         struct hid_device *hid = usb_get_intfdata(intf);
1295         struct usbhid_device *usbhid = hid->driver_data;
1296         int status;
1297
1298         if (message.event & PM_EVENT_AUTO) {
1299                 spin_lock_irq(&usbhid->lock);   /* Sync with error handler */
1300                 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1301                     && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1302                     && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1303                     && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1304                     && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1305                     && (!usbhid->ledcount || ignoreled))
1306                 {
1307                         set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1308                         spin_unlock_irq(&usbhid->lock);
1309                         if (hid->driver && hid->driver->suspend) {
1310                                 status = hid->driver->suspend(hid, message);
1311                                 if (status < 0)
1312                                         return status;
1313                         }
1314                 } else {
1315                         usbhid_mark_busy(usbhid);
1316                         spin_unlock_irq(&usbhid->lock);
1317                         return -EBUSY;
1318                 }
1319
1320         } else {
1321                 if (hid->driver && hid->driver->suspend) {
1322                         status = hid->driver->suspend(hid, message);
1323                         if (status < 0)
1324                                 return status;
1325                 }
1326                 spin_lock_irq(&usbhid->lock);
1327                 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1328                 spin_unlock_irq(&usbhid->lock);
1329                 if (usbhid_wait_io(hid) < 0)
1330                         return -EIO;
1331         }
1332
1333         if (!ignoreled && (message.event & PM_EVENT_AUTO)) {
1334                 spin_lock_irq(&usbhid->lock);
1335                 if (test_bit(HID_LED_ON, &usbhid->iofl)) {
1336                         spin_unlock_irq(&usbhid->lock);
1337                         usbhid_mark_busy(usbhid);
1338                         return -EBUSY;
1339                 }
1340                 spin_unlock_irq(&usbhid->lock);
1341         }
1342
1343         hid_cancel_delayed_stuff(usbhid);
1344         hid_cease_io(usbhid);
1345
1346         if ((message.event & PM_EVENT_AUTO) &&
1347                         test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1348                 /* lost race against keypresses */
1349                 status = hid_start_in(hid);
1350                 if (status < 0)
1351                         hid_io_error(hid);
1352                 usbhid_mark_busy(usbhid);
1353                 return -EBUSY;
1354         }
1355         dev_dbg(&intf->dev, "suspend\n");
1356         return 0;
1357 }
1358
1359 static int hid_resume(struct usb_interface *intf)
1360 {
1361         struct hid_device *hid = usb_get_intfdata (intf);
1362         struct usbhid_device *usbhid = hid->driver_data;
1363         int status;
1364
1365         if (!test_bit(HID_STARTED, &usbhid->iofl))
1366                 return 0;
1367
1368         clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1369         usbhid_mark_busy(usbhid);
1370
1371         if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1372             test_bit(HID_RESET_PENDING, &usbhid->iofl))
1373                 schedule_work(&usbhid->reset_work);
1374         usbhid->retry_delay = 0;
1375         status = hid_start_in(hid);
1376         if (status < 0)
1377                 hid_io_error(hid);
1378         usbhid_restart_queues(usbhid);
1379
1380         if (status >= 0 && hid->driver && hid->driver->resume) {
1381                 int ret = hid->driver->resume(hid);
1382                 if (ret < 0)
1383                         status = ret;
1384         }
1385         dev_dbg(&intf->dev, "resume status %d\n", status);
1386         return 0;
1387 }
1388
1389 static int hid_reset_resume(struct usb_interface *intf)
1390 {
1391         struct hid_device *hid = usb_get_intfdata(intf);
1392         struct usbhid_device *usbhid = hid->driver_data;
1393         int status;
1394
1395         clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1396         status = hid_post_reset(intf);
1397         if (status >= 0 && hid->driver && hid->driver->reset_resume) {
1398                 int ret = hid->driver->reset_resume(hid);
1399                 if (ret < 0)
1400                         status = ret;
1401         }
1402         return status;
1403 }
1404
1405 #endif /* CONFIG_PM */
1406
1407 static const struct usb_device_id hid_usb_ids[] = {
1408         { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1409                 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1410         { }                                             /* Terminating entry */
1411 };
1412
1413 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1414
1415 static struct usb_driver hid_driver = {
1416         .name =         "usbhid",
1417         .probe =        usbhid_probe,
1418         .disconnect =   usbhid_disconnect,
1419 #ifdef CONFIG_PM
1420         .suspend =      hid_suspend,
1421         .resume =       hid_resume,
1422         .reset_resume = hid_reset_resume,
1423 #endif
1424         .pre_reset =    hid_pre_reset,
1425         .post_reset =   hid_post_reset,
1426         .id_table =     hid_usb_ids,
1427         .supports_autosuspend = 1,
1428 };
1429
1430 static const struct hid_device_id hid_usb_table[] = {
1431         { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1432         { }
1433 };
1434
1435 struct usb_interface *usbhid_find_interface(int minor)
1436 {
1437         return usb_find_interface(&hid_driver, minor);
1438 }
1439
1440 static struct hid_driver hid_usb_driver = {
1441         .name = "generic-usb",
1442         .id_table = hid_usb_table,
1443 };
1444
1445 static int __init hid_init(void)
1446 {
1447         int retval = -ENOMEM;
1448
1449         retval = hid_register_driver(&hid_usb_driver);
1450         if (retval)
1451                 goto hid_register_fail;
1452         retval = usbhid_quirks_init(quirks_param);
1453         if (retval)
1454                 goto usbhid_quirks_init_fail;
1455         retval = usb_register(&hid_driver);
1456         if (retval)
1457                 goto usb_register_fail;
1458         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1459
1460         return 0;
1461 usb_register_fail:
1462         usbhid_quirks_exit();
1463 usbhid_quirks_init_fail:
1464         hid_unregister_driver(&hid_usb_driver);
1465 hid_register_fail:
1466         return retval;
1467 }
1468
1469 static void __exit hid_exit(void)
1470 {
1471         usb_deregister(&hid_driver);
1472         usbhid_quirks_exit();
1473         hid_unregister_driver(&hid_usb_driver);
1474 }
1475
1476 module_init(hid_init);
1477 module_exit(hid_exit);
1478
1479 MODULE_AUTHOR("Andreas Gal");
1480 MODULE_AUTHOR("Vojtech Pavlik");
1481 MODULE_AUTHOR("Jiri Kosina");
1482 MODULE_DESCRIPTION(DRIVER_DESC);
1483 MODULE_LICENSE(DRIVER_LICENSE);