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_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 static struct workqueue_struct *resumption_waker;
  71
  72 static void hid_io_error(struct hid_device *hid);
  73 static int hid_submit_out(struct hid_device *hid);
  74 static int hid_submit_ctrl(struct hid_device *hid);
  75 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid);
  76
  77 /* Start up the input URB */
  78 static int hid_start_in(struct hid_device *hid)
  79 {
  80         unsigned long flags;
  81         int rc = 0;
  82         struct usbhid_device *usbhid = hid->driver_data;
  83
  84         spin_lock_irqsave(&usbhid->lock, flags);
  85         if (hid->open > 0 &&
  86                         !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
  87                         !test_bit(HID_REPORTED_IDLE, &usbhid->iofl) &&
  88                         !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
  89                 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
  90                 if (rc != 0)
  91                         clear_bit(HID_IN_RUNNING, &usbhid->iofl);
  92         }
  93         spin_unlock_irqrestore(&usbhid->lock, flags);
  94         return rc;
  95 }
  96
  97 /* I/O retry timer routine */
  98 static void hid_retry_timeout(unsigned long _hid)
  99 {
 100         struct hid_device *hid = (struct hid_device *) _hid;
 101         struct usbhid_device *usbhid = hid->driver_data;
 102
 103         dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
 104         if (hid_start_in(hid))
 105                 hid_io_error(hid);
 106 }
 107
 108 /* Workqueue routine to reset the device or clear a halt */
 109 static void hid_reset(struct work_struct *work)
 110 {
 111         struct usbhid_device *usbhid =
 112                 container_of(work, struct usbhid_device, reset_work);
 113         struct hid_device *hid = usbhid->hid;
 114         int rc = 0;
 115
 116         if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
 117                 dev_dbg(&usbhid->intf->dev, "clear halt\n");
 118                 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
 119                 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
 120                 hid_start_in(hid);
 121         }
 122
 123         else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
 124                 dev_dbg(&usbhid->intf->dev, "resetting device\n");
 125                 rc = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
 126                 if (rc == 0) {
 127                         rc = usb_reset_device(hid_to_usb_dev(hid));
 128                         usb_unlock_device(hid_to_usb_dev(hid));
 129                 }
 130                 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
 131         }
 132
 133         switch (rc) {
 134         case 0:
 135                 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
 136                         hid_io_error(hid);
 137                 break;
 138         default:
 139                 err_hid("can't reset device, %s-%s/input%d, status %d",
 140                                 hid_to_usb_dev(hid)->bus->bus_name,
 141                                 hid_to_usb_dev(hid)->devpath,
 142                                 usbhid->ifnum, rc);
 143                 /* FALLTHROUGH */
 144         case -EHOSTUNREACH:
 145         case -ENODEV:
 146         case -EINTR:
 147                 break;
 148         }
 149 }
 150
 151 /* Main I/O error handler */
 152 static void hid_io_error(struct hid_device *hid)
 153 {
 154         unsigned long flags;
 155         struct usbhid_device *usbhid = hid->driver_data;
 156
 157         spin_lock_irqsave(&usbhid->lock, flags);
 158
 159         /* Stop when disconnected */
 160         if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
 161                 goto done;
 162
 163         /* If it has been a while since the last error, we'll assume
 164          * this a brand new error and reset the retry timeout. */
 165         if (time_after(jiffies, usbhid->stop_retry + HZ/2))
 166                 usbhid->retry_delay = 0;
 167
 168         /* When an error occurs, retry at increasing intervals */
 169         if (usbhid->retry_delay == 0) {
 170                 usbhid->retry_delay = 13;       /* Then 26, 52, 104, 104, ... */
 171                 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
 172         } else if (usbhid->retry_delay < 100)
 173                 usbhid->retry_delay *= 2;
 174
 175         if (time_after(jiffies, usbhid->stop_retry)) {
 176
 177                 /* Retries failed, so do a port reset */
 178                 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
 179                         schedule_work(&usbhid->reset_work);
 180                         goto done;
 181                 }
 182         }
 183
 184         mod_timer(&usbhid->io_retry,
 185                         jiffies + msecs_to_jiffies(usbhid->retry_delay));
 186 done:
 187         spin_unlock_irqrestore(&usbhid->lock, flags);
 188 }
 189
 190 static void usbhid_mark_busy(struct usbhid_device *usbhid)
 191 {
 192         struct usb_interface *intf = usbhid->intf;
 193
 194         usb_mark_last_busy(interface_to_usbdev(intf));
 195 }
 196
 197 static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
 198 {
 199         struct hid_device *hid = usb_get_intfdata(usbhid->intf);
 200         int kicked;
 201
 202         if (!hid)
 203                 return 0;
 204
 205         if ((kicked = (usbhid->outhead != usbhid->outtail))) {
 206                 dbg("Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
 207                 if (hid_submit_out(hid)) {
 208                         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 209                         wake_up(&usbhid->wait);
 210                 }
 211         }
 212         return kicked;
 213 }
 214
 215 static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
 216 {
 217         struct hid_device *hid = usb_get_intfdata(usbhid->intf);
 218         int kicked;
 219
 220         WARN_ON(hid == NULL);
 221         if (!hid)
 222                 return 0;
 223
 224         if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
 225                 dbg("Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
 226                 if (hid_submit_ctrl(hid)) {
 227                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 228                         wake_up(&usbhid->wait);
 229                 }
 230         }
 231         return kicked;
 232 }
 233
 234 /*
 235  * Input interrupt completion handler.
 236  */
 237
 238 static void hid_irq_in(struct urb *urb)
 239 {
 240         struct hid_device       *hid = urb->context;
 241         struct usbhid_device    *usbhid = hid->driver_data;
 242         int                     status;
 243
 244         switch (urb->status) {
 245         case 0:                 /* success */
 246                 usbhid_mark_busy(usbhid);
 247                 usbhid->retry_delay = 0;
 248                 hid_input_report(urb->context, HID_INPUT_REPORT,
 249                                  urb->transfer_buffer,
 250                                  urb->actual_length, 1);
 251                 /*
 252                  * autosuspend refused while keys are pressed
 253                  * because most keyboards don't wake up when
 254                  * a key is released
 255                  */
 256                 if (hid_check_keys_pressed(hid))
 257                         set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
 258                 else
 259                         clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
 260                 break;
 261         case -EPIPE:            /* stall */
 262                 usbhid_mark_busy(usbhid);
 263                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 264                 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
 265                 schedule_work(&usbhid->reset_work);
 266                 return;
 267         case -ECONNRESET:       /* unlink */
 268         case -ENOENT:
 269         case -ESHUTDOWN:        /* unplug */
 270                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 271                 return;
 272         case -EILSEQ:           /* protocol error or unplug */
 273         case -EPROTO:           /* protocol error or unplug */
 274         case -ETIME:            /* protocol error or unplug */
 275         case -ETIMEDOUT:        /* Should never happen, but... */
 276                 usbhid_mark_busy(usbhid);
 277                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 278                 hid_io_error(hid);
 279                 return;
 280         default:                /* error */
 281                 dev_warn(&urb->dev->dev, "input irq status %d  "
 282                                 "received\n", urb->status);
 283         }
 284
 285         status = usb_submit_urb(urb, GFP_ATOMIC);
 286         if (status) {
 287                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 288                 if (status != -EPERM) {
 289                         err_hid("can't resubmit intr, %s-%s/input%d, status %d",
 290                                         hid_to_usb_dev(hid)->bus->bus_name,
 291                                         hid_to_usb_dev(hid)->devpath,
 292                                         usbhid->ifnum, status);
 293                         hid_io_error(hid);
 294                 }
 295         }
 296 }
 297
 298 static int hid_submit_out(struct hid_device *hid)
 299 {
 300         struct hid_report *report;
 301         char *raw_report;
 302         struct usbhid_device *usbhid = hid->driver_data;
 303
 304         report = usbhid->out[usbhid->outtail].report;
 305         raw_report = usbhid->out[usbhid->outtail].raw_report;
 306
 307         if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
 308                 usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 309                 usbhid->urbout->dev = hid_to_usb_dev(hid);
 310                 memcpy(usbhid->outbuf, raw_report, usbhid->urbout->transfer_buffer_length);
 311                 kfree(raw_report);
 312
 313                 dbg_hid("submitting out urb\n");
 314
 315                 if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
 316                         err_hid("usb_submit_urb(out) failed");
 317                         return -1;
 318                 }
 319         } else {
 320                 /*
 321                  * queue work to wake up the device.
 322                  * as the work queue is freezeable, this is safe
 323                  * with respect to STD and STR
 324                  */
 325                 queue_work(resumption_waker, &usbhid->restart_work);
 326         }
 327
 328         return 0;
 329 }
 330
 331 static int hid_submit_ctrl(struct hid_device *hid)
 332 {
 333         struct hid_report *report;
 334         unsigned char dir;
 335         char *raw_report;
 336         int len;
 337         struct usbhid_device *usbhid = hid->driver_data;
 338
 339         report = usbhid->ctrl[usbhid->ctrltail].report;
 340         raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
 341         dir = usbhid->ctrl[usbhid->ctrltail].dir;
 342
 343         if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
 344                 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 345                 if (dir == USB_DIR_OUT) {
 346                         usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
 347                         usbhid->urbctrl->transfer_buffer_length = len;
 348                         memcpy(usbhid->ctrlbuf, raw_report, len);
 349                         kfree(raw_report);
 350                 } else {
 351                         int maxpacket, padlen;
 352
 353                         usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
 354                         maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
 355                         if (maxpacket > 0) {
 356                                 padlen = DIV_ROUND_UP(len, maxpacket);
 357                                 padlen *= maxpacket;
 358                                 if (padlen > usbhid->bufsize)
 359                                         padlen = usbhid->bufsize;
 360                         } else
 361                                 padlen = 0;
 362                         usbhid->urbctrl->transfer_buffer_length = padlen;
 363                 }
 364                 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
 365
 366                 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
 367                 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
 368                 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
 369                 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
 370                 usbhid->cr->wLength = cpu_to_le16(len);
 371
 372                 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
 373                         usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
 374                         usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
 375
 376                 if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
 377                         err_hid("usb_submit_urb(ctrl) failed");
 378                         return -1;
 379                 }
 380         } else {
 381                 /*
 382                  * queue work to wake up the device.
 383                  * as the work queue is freezeable, this is safe
 384                  * with respect to STD and STR
 385                  */
 386                 queue_work(resumption_waker, &usbhid->restart_work);
 387         }
 388
 389         return 0;
 390 }
 391
 392 /*
 393  * Output interrupt completion handler.
 394  */
 395
 396 static void hid_irq_out(struct urb *urb)
 397 {
 398         struct hid_device *hid = urb->context;
 399         struct usbhid_device *usbhid = hid->driver_data;
 400         unsigned long flags;
 401         int unplug = 0;
 402
 403         switch (urb->status) {
 404         case 0:                 /* success */
 405                 break;
 406         case -ESHUTDOWN:        /* unplug */
 407                 unplug = 1;
 408         case -EILSEQ:           /* protocol error or unplug */
 409         case -EPROTO:           /* protocol error or unplug */
 410         case -ECONNRESET:       /* unlink */
 411         case -ENOENT:
 412                 break;
 413         default:                /* error */
 414                 dev_warn(&urb->dev->dev, "output irq status %d "
 415                                 "received\n", urb->status);
 416         }
 417
 418         spin_lock_irqsave(&usbhid->lock, flags);
 419
 420         if (unplug)
 421                 usbhid->outtail = usbhid->outhead;
 422         else
 423                 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
 424
 425         if (usbhid->outhead != usbhid->outtail) {
 426                 if (hid_submit_out(hid)) {
 427                         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 428                         wake_up(&usbhid->wait);
 429                 }
 430                 spin_unlock_irqrestore(&usbhid->lock, flags);
 431                 return;
 432         }
 433
 434         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 435         spin_unlock_irqrestore(&usbhid->lock, flags);
 436         wake_up(&usbhid->wait);
 437 }
 438
 439 /*
 440  * Control pipe completion handler.
 441  */
 442
 443 static void hid_ctrl(struct urb *urb)
 444 {
 445         struct hid_device *hid = urb->context;
 446         struct usbhid_device *usbhid = hid->driver_data;
 447         int unplug = 0, status = urb->status;
 448
 449         spin_lock(&usbhid->lock);
 450
 451         switch (status) {
 452         case 0:                 /* success */
 453                 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
 454                         hid_input_report(urb->context,
 455                                 usbhid->ctrl[usbhid->ctrltail].report->type,
 456                                 urb->transfer_buffer, urb->actual_length, 0);
 457                 break;
 458         case -ESHUTDOWN:        /* unplug */
 459                 unplug = 1;
 460         case -EILSEQ:           /* protocol error or unplug */
 461         case -EPROTO:           /* protocol error or unplug */
 462         case -ECONNRESET:       /* unlink */
 463         case -ENOENT:
 464         case -EPIPE:            /* report not available */
 465                 break;
 466         default:                /* error */
 467                 dev_warn(&urb->dev->dev, "ctrl urb status %d "
 468                                 "received\n", status);
 469         }
 470
 471         if (unplug)
 472                 usbhid->ctrltail = usbhid->ctrlhead;
 473         else
 474                 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
 475
 476         if (usbhid->ctrlhead != usbhid->ctrltail) {
 477                 if (hid_submit_ctrl(hid)) {
 478                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 479                         wake_up(&usbhid->wait);
 480                 }
 481                 spin_unlock(&usbhid->lock);
 482                 return;
 483         }
 484
 485         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 486         spin_unlock(&usbhid->lock);
 487         wake_up(&usbhid->wait);
 488 }
 489
 490 static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
 491                                    unsigned char dir)
 492 {
 493         int head;
 494         struct usbhid_device *usbhid = hid->driver_data;
 495         int len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 496
 497         if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
 498                 return;
 499
 500         if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
 501                 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
 502                         dev_warn(&hid->dev, "output queue full\n");
 503                         return;
 504                 }
 505
 506                 usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC);
 507                 if (!usbhid->out[usbhid->outhead].raw_report) {
 508                         dev_warn(&hid->dev, "output queueing failed\n");
 509                         return;
 510                 }
 511                 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
 512                 usbhid->out[usbhid->outhead].report = report;
 513                 usbhid->outhead = head;
 514
 515                 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl))
 516                         if (hid_submit_out(hid))
 517                                 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 518                 return;
 519         }
 520
 521         if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
 522                 dev_warn(&hid->dev, "control queue full\n");
 523                 return;
 524         }
 525
 526         if (dir == USB_DIR_OUT) {
 527                 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC);
 528                 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
 529                         dev_warn(&hid->dev, "control queueing failed\n");
 530                         return;
 531                 }
 532                 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
 533         }
 534         usbhid->ctrl[usbhid->ctrlhead].report = report;
 535         usbhid->ctrl[usbhid->ctrlhead].dir = dir;
 536         usbhid->ctrlhead = head;
 537
 538         if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
 539                 if (hid_submit_ctrl(hid))
 540                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 541 }
 542
 543 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
 544 {
 545         struct usbhid_device *usbhid = hid->driver_data;
 546         unsigned long flags;
 547
 548         spin_lock_irqsave(&usbhid->lock, flags);
 549         __usbhid_submit_report(hid, report, dir);
 550         spin_unlock_irqrestore(&usbhid->lock, flags);
 551 }
 552 EXPORT_SYMBOL_GPL(usbhid_submit_report);
 553
 554 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
 555 {
 556         struct hid_device *hid = input_get_drvdata(dev);
 557         struct usbhid_device *usbhid = hid->driver_data;
 558         struct hid_field *field;
 559         unsigned long flags;
 560         int offset;
 561
 562         if (type == EV_FF)
 563                 return input_ff_event(dev, type, code, value);
 564
 565         if (type != EV_LED)
 566                 return -1;
 567
 568         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
 569                 dev_warn(&dev->dev, "event field not found\n");
 570                 return -1;
 571         }
 572
 573         hid_set_field(field, offset, value);
 574         if (value) {
 575                 spin_lock_irqsave(&usbhid->lock, flags);
 576                 usbhid->ledcount++;
 577                 spin_unlock_irqrestore(&usbhid->lock, flags);
 578         } else {
 579                 spin_lock_irqsave(&usbhid->lock, flags);
 580                 usbhid->ledcount--;
 581                 spin_unlock_irqrestore(&usbhid->lock, flags);
 582         }
 583         usbhid_submit_report(hid, field->report, USB_DIR_OUT);
 584
 585         return 0;
 586 }
 587
 588 int usbhid_wait_io(struct hid_device *hid)
 589 {
 590         struct usbhid_device *usbhid = hid->driver_data;
 591
 592         if (!wait_event_timeout(usbhid->wait,
 593                                 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
 594                                 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
 595                                         10*HZ)) {
 596                 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
 597                 return -1;
 598         }
 599
 600         return 0;
 601 }
 602
 603 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
 604 {
 605         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 606                 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
 607                 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
 608 }
 609
 610 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
 611                 unsigned char type, void *buf, int size)
 612 {
 613         int result, retries = 4;
 614
 615         memset(buf, 0, size);
 616
 617         do {
 618                 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 619                                 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
 620                                 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
 621                 retries--;
 622         } while (result < size && retries);
 623         return result;
 624 }
 625
 626 int usbhid_open(struct hid_device *hid)
 627 {
 628         struct usbhid_device *usbhid = hid->driver_data;
 629         int res;
 630
 631         mutex_lock(&hid_open_mut);
 632         if (!hid->open++) {
 633                 res = usb_autopm_get_interface(usbhid->intf);
 634                 /* the device must be awake to reliable request remote wakeup */
 635                 if (res < 0) {
 636                         hid->open--;
 637                         mutex_unlock(&hid_open_mut);
 638                         return -EIO;
 639                 }
 640                 usbhid->intf->needs_remote_wakeup = 1;
 641                 if (hid_start_in(hid))
 642                         hid_io_error(hid);
 643
 644                 usb_autopm_put_interface(usbhid->intf);
 645         }
 646         mutex_unlock(&hid_open_mut);
 647         return 0;
 648 }
 649
 650 void usbhid_close(struct hid_device *hid)
 651 {
 652         struct usbhid_device *usbhid = hid->driver_data;
 653
 654         mutex_lock(&hid_open_mut);
 655
 656         /* protecting hid->open to make sure we don't restart
 657          * data acquistion due to a resumption we no longer
 658          * care about
 659          */
 660         spin_lock_irq(&usbhid->lock);
 661         if (!--hid->open) {
 662                 spin_unlock_irq(&usbhid->lock);
 663                 hid_cancel_delayed_stuff(usbhid);
 664                 usb_kill_urb(usbhid->urbin);
 665                 usbhid->intf->needs_remote_wakeup = 0;
 666         } else {
 667                 spin_unlock_irq(&usbhid->lock);
 668         }
 669         mutex_unlock(&hid_open_mut);
 670 }
 671
 672 /*
 673  * Initialize all reports
 674  */
 675
 676 void usbhid_init_reports(struct hid_device *hid)
 677 {
 678         struct hid_report *report;
 679         struct usbhid_device *usbhid = hid->driver_data;
 680         int err, ret;
 681
 682         list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
 683                 usbhid_submit_report(hid, report, USB_DIR_IN);
 684
 685         list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
 686                 usbhid_submit_report(hid, report, USB_DIR_IN);
 687
 688         err = 0;
 689         ret = usbhid_wait_io(hid);
 690         while (ret) {
 691                 err |= ret;
 692                 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
 693                         usb_kill_urb(usbhid->urbctrl);
 694                 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
 695                         usb_kill_urb(usbhid->urbout);
 696                 ret = usbhid_wait_io(hid);
 697         }
 698
 699         if (err)
 700                 dev_warn(&hid->dev, "timeout initializing reports\n");
 701 }
 702
 703 /*
 704  * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
 705  */
 706 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
 707     unsigned int hid_code, struct hid_field **pfield)
 708 {
 709         struct hid_report *report;
 710         struct hid_field *field;
 711         struct hid_usage *usage;
 712         int i, j;
 713
 714         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
 715                 for (i = 0; i < report->maxfield; i++) {
 716                         field = report->field[i];
 717                         for (j = 0; j < field->maxusage; j++) {
 718                                 usage = &field->usage[j];
 719                                 if ((usage->hid & HID_USAGE_PAGE) == page &&
 720                                     (usage->hid & 0xFFFF) == hid_code) {
 721                                         *pfield = field;
 722                                         return j;
 723                                 }
 724                         }
 725                 }
 726         }
 727         return -1;
 728 }
 729
 730 void usbhid_set_leds(struct hid_device *hid)
 731 {
 732         struct hid_field *field;
 733         int offset;
 734
 735         if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
 736                 hid_set_field(field, offset, 0);
 737                 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
 738         }
 739 }
 740 EXPORT_SYMBOL_GPL(usbhid_set_leds);
 741
 742 /*
 743  * Traverse the supplied list of reports and find the longest
 744  */
 745 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
 746                 unsigned int *max)
 747 {
 748         struct hid_report *report;
 749         unsigned int size;
 750
 751         list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
 752                 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
 753                 if (*max < size)
 754                         *max = size;
 755         }
 756 }
 757
 758 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
 759 {
 760         struct usbhid_device *usbhid = hid->driver_data;
 761
 762         usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
 763                         &usbhid->inbuf_dma);
 764         usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
 765                         &usbhid->outbuf_dma);
 766         usbhid->cr = usb_buffer_alloc(dev, sizeof(*usbhid->cr), GFP_KERNEL,
 767                         &usbhid->cr_dma);
 768         usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
 769                         &usbhid->ctrlbuf_dma);
 770         if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
 771                         !usbhid->ctrlbuf)
 772                 return -1;
 773
 774         return 0;
 775 }
 776
 777 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
 778 {
 779         struct usbhid_device *usbhid = hid->driver_data;
 780         struct usb_device *dev = hid_to_usb_dev(hid);
 781         struct usb_interface *intf = usbhid->intf;
 782         struct usb_host_interface *interface = intf->cur_altsetting;
 783         int ret;
 784
 785         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 786                 HID_REQ_SET_REPORT,
 787                 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 788                 ((HID_OUTPUT_REPORT + 1) << 8) | *buf,
 789                 interface->desc.bInterfaceNumber, buf + 1, count - 1,
 790                 USB_CTRL_SET_TIMEOUT);
 791
 792         /* count also the report id */
 793         if (ret > 0)
 794                 ret++;
 795
 796         return ret;
 797 }
 798
 799 static void usbhid_restart_queues(struct usbhid_device *usbhid)
 800 {
 801         if (usbhid->urbout)
 802                 usbhid_restart_out_queue(usbhid);
 803         usbhid_restart_ctrl_queue(usbhid);
 804 }
 805
 806 static void __usbhid_restart_queues(struct work_struct *work)
 807 {
 808         struct usbhid_device *usbhid =
 809                 container_of(work, struct usbhid_device, restart_work);
 810         int r;
 811
 812         r = usb_autopm_get_interface(usbhid->intf);
 813         if (r < 0)
 814                 return;
 815         usb_autopm_put_interface(usbhid->intf);
 816 }
 817
 818 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
 819 {
 820         struct usbhid_device *usbhid = hid->driver_data;
 821
 822         usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
 823         usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
 824         usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
 825         usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
 826 }
 827
 828 static int usbhid_parse(struct hid_device *hid)
 829 {
 830         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
 831         struct usb_host_interface *interface = intf->cur_altsetting;
 832         struct usb_device *dev = interface_to_usbdev (intf);
 833         struct hid_descriptor *hdesc;
 834         u32 quirks = 0;
 835         unsigned int rsize = 0;
 836         char *rdesc;
 837         int ret, n;
 838
 839         quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
 840                         le16_to_cpu(dev->descriptor.idProduct));
 841
 842         if (quirks & HID_QUIRK_IGNORE)
 843                 return -ENODEV;
 844
 845         /* Many keyboards and mice don't like to be polled for reports,
 846          * so we will always set the HID_QUIRK_NOGET flag for them. */
 847         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
 848                 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
 849                         interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
 850                                 quirks |= HID_QUIRK_NOGET;
 851         }
 852
 853         if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
 854             (!interface->desc.bNumEndpoints ||
 855              usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
 856                 dbg_hid("class descriptor not present\n");
 857                 return -ENODEV;
 858         }
 859
 860         hid->version = le16_to_cpu(hdesc->bcdHID);
 861         hid->country = hdesc->bCountryCode;
 862
 863         for (n = 0; n < hdesc->bNumDescriptors; n++)
 864                 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
 865                         rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
 866
 867         if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
 868                 dbg_hid("weird size of report descriptor (%u)\n", rsize);
 869                 return -EINVAL;
 870         }
 871
 872         if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
 873                 dbg_hid("couldn't allocate rdesc memory\n");
 874                 return -ENOMEM;
 875         }
 876
 877         hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
 878
 879         ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
 880                         HID_DT_REPORT, rdesc, rsize);
 881         if (ret < 0) {
 882                 dbg_hid("reading report descriptor failed\n");
 883                 kfree(rdesc);
 884                 goto err;
 885         }
 886
 887         ret = hid_parse_report(hid, rdesc, rsize);
 888         kfree(rdesc);
 889         if (ret) {
 890                 dbg_hid("parsing report descriptor failed\n");
 891                 goto err;
 892         }
 893
 894         hid->quirks |= quirks;
 895
 896         return 0;
 897 err:
 898         return ret;
 899 }
 900
 901 static int usbhid_start(struct hid_device *hid)
 902 {
 903         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
 904         struct usb_host_interface *interface = intf->cur_altsetting;
 905         struct usb_device *dev = interface_to_usbdev(intf);
 906         struct usbhid_device *usbhid = hid->driver_data;
 907         unsigned int n, insize = 0;
 908         int ret;
 909
 910         clear_bit(HID_DISCONNECTED, &usbhid->iofl);
 911
 912         usbhid->bufsize = HID_MIN_BUFFER_SIZE;
 913         hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
 914         hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
 915         hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
 916
 917         if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
 918                 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
 919
 920         hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
 921
 922         if (insize > HID_MAX_BUFFER_SIZE)
 923                 insize = HID_MAX_BUFFER_SIZE;
 924
 925         if (hid_alloc_buffers(dev, hid)) {
 926                 ret = -ENOMEM;
 927                 goto fail;
 928         }
 929
 930         for (n = 0; n < interface->desc.bNumEndpoints; n++) {
 931                 struct usb_endpoint_descriptor *endpoint;
 932                 int pipe;
 933                 int interval;
 934
 935                 endpoint = &interface->endpoint[n].desc;
 936                 if (!usb_endpoint_xfer_int(endpoint))
 937                         continue;
 938
 939                 interval = endpoint->bInterval;
 940
 941                 /* Some vendors give fullspeed interval on highspeed devides */
 942                 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
 943                     dev->speed == USB_SPEED_HIGH) {
 944                         interval = fls(endpoint->bInterval*8);
 945                         printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
 946                                hid->name, endpoint->bInterval, interval);
 947                 }
 948
 949                 /* Change the polling interval of mice. */
 950                 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
 951                         interval = hid_mousepoll_interval;
 952
 953                 ret = -ENOMEM;
 954                 if (usb_endpoint_dir_in(endpoint)) {
 955                         if (usbhid->urbin)
 956                                 continue;
 957                         if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
 958                                 goto fail;
 959                         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 960                         usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
 961                                          hid_irq_in, hid, interval);
 962                         usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
 963                         usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 964                 } else {
 965                         if (usbhid->urbout)
 966                                 continue;
 967                         if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
 968                                 goto fail;
 969                         pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
 970                         usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
 971                                          hid_irq_out, hid, interval);
 972                         usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
 973                         usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 974                 }
 975         }
 976
 977         init_waitqueue_head(&usbhid->wait);
 978         INIT_WORK(&usbhid->reset_work, hid_reset);
 979         INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
 980         setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
 981
 982         spin_lock_init(&usbhid->lock);
 983
 984         usbhid->intf = intf;
 985         usbhid->ifnum = interface->desc.bInterfaceNumber;
 986
 987         usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
 988         if (!usbhid->urbctrl) {
 989                 ret = -ENOMEM;
 990                 goto fail;
 991         }
 992
 993         usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
 994                              usbhid->ctrlbuf, 1, hid_ctrl, hid);
 995         usbhid->urbctrl->setup_dma = usbhid->cr_dma;
 996         usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
 997         usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
 998
 999         if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS))
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         int status;
1257
1258         if (message.event & PM_EVENT_AUTO) {
1259                 spin_lock_irq(&usbhid->lock);   /* Sync with error handler */
1260                 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1261                     && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1262                     && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1263                     && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1264                     && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1265                     && (!usbhid->ledcount || ignoreled))
1266                 {
1267                         set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1268                         spin_unlock_irq(&usbhid->lock);
1269                 } else {
1270                         usbhid_mark_busy(usbhid);
1271                         spin_unlock_irq(&usbhid->lock);
1272                         return -EBUSY;
1273                 }
1274
1275         } else {
1276                 spin_lock_irq(&usbhid->lock);
1277                 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1278                 spin_unlock_irq(&usbhid->lock);
1279                 if (usbhid_wait_io(hid) < 0)
1280                         return -EIO;
1281         }
1282
1283         if (!ignoreled && (message.event & PM_EVENT_AUTO)) {
1284                 spin_lock_irq(&usbhid->lock);
1285                 if (test_bit(HID_LED_ON, &usbhid->iofl)) {
1286                         spin_unlock_irq(&usbhid->lock);
1287                         usbhid_mark_busy(usbhid);
1288                         return -EBUSY;
1289                 }
1290                 spin_unlock_irq(&usbhid->lock);
1291         }
1292
1293         hid_cancel_delayed_stuff(usbhid);
1294         hid_cease_io(usbhid);
1295
1296         if ((message.event & PM_EVENT_AUTO) &&
1297                         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_DESC "\n");
1398
1399         return 0;
1400 usb_register_fail:
1401         hiddev_exit();
1402 hiddev_init_fail:
1403         usbhid_quirks_exit();
1404 usbhid_quirks_init_fail:
1405         hid_unregister_driver(&hid_usb_driver);
1406 hid_register_fail:
1407         destroy_workqueue(resumption_waker);
1408 no_queue:
1409         return retval;
1410 }
1411
1412 static void __exit hid_exit(void)
1413 {
1414         usb_deregister(&hid_driver);
1415         hiddev_exit();
1416         usbhid_quirks_exit();
1417         hid_unregister_driver(&hid_usb_driver);
1418         destroy_workqueue(resumption_waker);
1419 }
1420
1421 module_init(hid_init);
1422 module_exit(hid_exit);
1423
1424 MODULE_AUTHOR("Andreas Gal");
1425 MODULE_AUTHOR("Vojtech Pavlik");
1426 MODULE_AUTHOR("Jiri Kosina");
1427 MODULE_DESCRIPTION(DRIVER_DESC);
1428 MODULE_LICENSE(DRIVER_LICENSE);