git.oblomov.eu Git - linux-2.6/blob - drivers/hid/usbhid/hid-core.c

   1 /*
   2  *  USB HID support for Linux
   3  *
   4  *  Copyright (c) 1999 Andreas Gal
   5  *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
   6  *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
   7  *  Copyright (c) 2006-2007 Jiri Kosina
   8  */
   9
  10 /*
  11  * This program is free software; you can redistribute it and/or modify it
  12  * under the terms of the GNU General Public License as published by the Free
  13  * Software Foundation; either version 2 of the License, or (at your option)
  14  * any later version.
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/slab.h>
  19 #include <linux/init.h>
  20 #include <linux/kernel.h>
  21 #include <linux/list.h>
  22 #include <linux/mm.h>
  23 #include <linux/smp_lock.h>
  24 #include <linux/spinlock.h>
  25 #include <asm/unaligned.h>
  26 #include <asm/byteorder.h>
  27 #include <linux/input.h>
  28 #include <linux/wait.h>
  29
  30 #include <linux/usb.h>
  31
  32 #include <linux/hid.h>
  33 #include <linux/hiddev.h>
  34 #include <linux/hid-debug.h>
  35 #include <linux/hidraw.h>
  36 #include "usbhid.h"
  37
  38 /*
  39  * Version Information
  40  */
  41
  42 #define DRIVER_VERSION "v2.6"
  43 #define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik, Jiri Kosina"
  44 #define DRIVER_DESC "USB HID core driver"
  45 #define DRIVER_LICENSE "GPL"
  46
  47 static char *hid_types[] = {"Device", "Pointer", "Mouse", "Device", "Joystick",
  48                                 "Gamepad", "Keyboard", "Keypad", "Multi-Axis Controller"};
  49 /*
  50  * Module parameters.
  51  */
  52
  53 static unsigned int hid_mousepoll_interval;
  54 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
  55 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
  56
  57 /* Quirks specified at module load time */
  58 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
  59 module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
  60 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
  61                 " quirks=vendorID:productID:quirks"
  62                 " where vendorID, productID, and quirks are all in"
  63                 " 0x-prefixed hex");
  64 static char *rdesc_quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
  65 module_param_array_named(rdesc_quirks, rdesc_quirks_param, charp, NULL, 0444);
  66 MODULE_PARM_DESC(rdesc_quirks, "Add/modify report descriptor quirks by specifying "
  67                 " rdesc_quirks=vendorID:productID:rdesc_quirks"
  68                 " where vendorID, productID, and rdesc_quirks are all in"
  69                 " 0x-prefixed hex");
  70 /*
  71  * Input submission and I/O error handler.
  72  */
  73
  74 static void hid_io_error(struct hid_device *hid);
  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->inlock, flags);
  84         if (hid->open > 0 && !test_bit(HID_SUSPENDED, &usbhid->iofl) &&
  85                         !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
  86                 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
  87                 if (rc != 0)
  88                         clear_bit(HID_IN_RUNNING, &usbhid->iofl);
  89         }
  90         spin_unlock_irqrestore(&usbhid->inlock, flags);
  91         return rc;
  92 }
  93
  94 /* I/O retry timer routine */
  95 static void hid_retry_timeout(unsigned long _hid)
  96 {
  97         struct hid_device *hid = (struct hid_device *) _hid;
  98         struct usbhid_device *usbhid = hid->driver_data;
  99
 100         dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
 101         if (hid_start_in(hid))
 102                 hid_io_error(hid);
 103 }
 104
 105 /* Workqueue routine to reset the device or clear a halt */
 106 static void hid_reset(struct work_struct *work)
 107 {
 108         struct usbhid_device *usbhid =
 109                 container_of(work, struct usbhid_device, reset_work);
 110         struct hid_device *hid = usbhid->hid;
 111         int rc_lock, rc = 0;
 112
 113         if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
 114                 dev_dbg(&usbhid->intf->dev, "clear halt\n");
 115                 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
 116                 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
 117                 hid_start_in(hid);
 118         }
 119
 120         else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
 121                 dev_dbg(&usbhid->intf->dev, "resetting device\n");
 122                 rc = rc_lock = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
 123                 if (rc_lock >= 0) {
 124                         rc = usb_reset_composite_device(hid_to_usb_dev(hid), usbhid->intf);
 125                         if (rc_lock)
 126                                 usb_unlock_device(hid_to_usb_dev(hid));
 127                 }
 128                 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
 129         }
 130
 131         switch (rc) {
 132         case 0:
 133                 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
 134                         hid_io_error(hid);
 135                 break;
 136         default:
 137                 err_hid("can't reset device, %s-%s/input%d, status %d",
 138                                 hid_to_usb_dev(hid)->bus->bus_name,
 139                                 hid_to_usb_dev(hid)->devpath,
 140                                 usbhid->ifnum, rc);
 141                 /* FALLTHROUGH */
 142         case -EHOSTUNREACH:
 143         case -ENODEV:
 144         case -EINTR:
 145                 break;
 146         }
 147 }
 148
 149 /* Main I/O error handler */
 150 static void hid_io_error(struct hid_device *hid)
 151 {
 152         unsigned long flags;
 153         struct usbhid_device *usbhid = hid->driver_data;
 154
 155         spin_lock_irqsave(&usbhid->inlock, flags);
 156
 157         /* Stop when disconnected */
 158         if (usb_get_intfdata(usbhid->intf) == NULL)
 159                 goto done;
 160
 161         /* If it has been a while since the last error, we'll assume
 162          * this a brand new error and reset the retry timeout. */
 163         if (time_after(jiffies, usbhid->stop_retry + HZ/2))
 164                 usbhid->retry_delay = 0;
 165
 166         /* When an error occurs, retry at increasing intervals */
 167         if (usbhid->retry_delay == 0) {
 168                 usbhid->retry_delay = 13;       /* Then 26, 52, 104, 104, ... */
 169                 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
 170         } else if (usbhid->retry_delay < 100)
 171                 usbhid->retry_delay *= 2;
 172
 173         if (time_after(jiffies, usbhid->stop_retry)) {
 174
 175                 /* Retries failed, so do a port reset */
 176                 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
 177                         schedule_work(&usbhid->reset_work);
 178                         goto done;
 179                 }
 180         }
 181
 182         mod_timer(&usbhid->io_retry,
 183                         jiffies + msecs_to_jiffies(usbhid->retry_delay));
 184 done:
 185         spin_unlock_irqrestore(&usbhid->inlock, flags);
 186 }
 187
 188 /*
 189  * Input interrupt completion handler.
 190  */
 191
 192 static void hid_irq_in(struct urb *urb)
 193 {
 194         struct hid_device       *hid = urb->context;
 195         struct usbhid_device    *usbhid = hid->driver_data;
 196         int                     status;
 197
 198         switch (urb->status) {
 199                 case 0:                 /* success */
 200                         usbhid->retry_delay = 0;
 201                         hid_input_report(urb->context, HID_INPUT_REPORT,
 202                                          urb->transfer_buffer,
 203                                          urb->actual_length, 1);
 204                         break;
 205                 case -EPIPE:            /* stall */
 206                         clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 207                         set_bit(HID_CLEAR_HALT, &usbhid->iofl);
 208                         schedule_work(&usbhid->reset_work);
 209                         return;
 210                 case -ECONNRESET:       /* unlink */
 211                 case -ENOENT:
 212                 case -ESHUTDOWN:        /* unplug */
 213                         clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 214                         return;
 215                 case -EILSEQ:           /* protocol error or unplug */
 216                 case -EPROTO:           /* protocol error or unplug */
 217                 case -ETIME:            /* protocol error or unplug */
 218                 case -ETIMEDOUT:        /* Should never happen, but... */
 219                         clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 220                         hid_io_error(hid);
 221                         return;
 222                 default:                /* error */
 223                         warn("input irq status %d received", urb->status);
 224         }
 225
 226         status = usb_submit_urb(urb, GFP_ATOMIC);
 227         if (status) {
 228                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 229                 if (status != -EPERM) {
 230                         err_hid("can't resubmit intr, %s-%s/input%d, status %d",
 231                                         hid_to_usb_dev(hid)->bus->bus_name,
 232                                         hid_to_usb_dev(hid)->devpath,
 233                                         usbhid->ifnum, status);
 234                         hid_io_error(hid);
 235                 }
 236         }
 237 }
 238
 239 static int hid_submit_out(struct hid_device *hid)
 240 {
 241         struct hid_report *report;
 242         struct usbhid_device *usbhid = hid->driver_data;
 243
 244         report = usbhid->out[usbhid->outtail];
 245
 246         hid_output_report(report, usbhid->outbuf);
 247         usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 248         usbhid->urbout->dev = hid_to_usb_dev(hid);
 249
 250         dbg_hid("submitting out urb\n");
 251
 252         if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
 253                 err_hid("usb_submit_urb(out) failed");
 254                 return -1;
 255         }
 256
 257         return 0;
 258 }
 259
 260 static int hid_submit_ctrl(struct hid_device *hid)
 261 {
 262         struct hid_report *report;
 263         unsigned char dir;
 264         int len;
 265         struct usbhid_device *usbhid = hid->driver_data;
 266
 267         report = usbhid->ctrl[usbhid->ctrltail].report;
 268         dir = usbhid->ctrl[usbhid->ctrltail].dir;
 269
 270         len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 271         if (dir == USB_DIR_OUT) {
 272                 hid_output_report(report, usbhid->ctrlbuf);
 273                 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
 274                 usbhid->urbctrl->transfer_buffer_length = len;
 275         } else {
 276                 int maxpacket, padlen;
 277
 278                 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
 279                 maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
 280                 if (maxpacket > 0) {
 281                         padlen = DIV_ROUND_UP(len, maxpacket);
 282                         padlen *= maxpacket;
 283                         if (padlen > usbhid->bufsize)
 284                                 padlen = usbhid->bufsize;
 285                 } else
 286                         padlen = 0;
 287                 usbhid->urbctrl->transfer_buffer_length = padlen;
 288         }
 289         usbhid->urbctrl->dev = hid_to_usb_dev(hid);
 290
 291         usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
 292         usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
 293         usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
 294         usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
 295         usbhid->cr->wLength = cpu_to_le16(len);
 296
 297         dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
 298                 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
 299                 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
 300
 301         if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
 302                 err_hid("usb_submit_urb(ctrl) failed");
 303                 return -1;
 304         }
 305
 306         return 0;
 307 }
 308
 309 /*
 310  * Output interrupt completion handler.
 311  */
 312
 313 static void hid_irq_out(struct urb *urb)
 314 {
 315         struct hid_device *hid = urb->context;
 316         struct usbhid_device *usbhid = hid->driver_data;
 317         unsigned long flags;
 318         int unplug = 0;
 319
 320         switch (urb->status) {
 321                 case 0:                 /* success */
 322                         break;
 323                 case -ESHUTDOWN:        /* unplug */
 324                         unplug = 1;
 325                 case -EILSEQ:           /* protocol error or unplug */
 326                 case -EPROTO:           /* protocol error or unplug */
 327                 case -ECONNRESET:       /* unlink */
 328                 case -ENOENT:
 329                         break;
 330                 default:                /* error */
 331                         warn("output irq status %d received", urb->status);
 332         }
 333
 334         spin_lock_irqsave(&usbhid->outlock, flags);
 335
 336         if (unplug)
 337                 usbhid->outtail = usbhid->outhead;
 338         else
 339                 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
 340
 341         if (usbhid->outhead != usbhid->outtail) {
 342                 if (hid_submit_out(hid)) {
 343                         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 344                         wake_up(&hid->wait);
 345                 }
 346                 spin_unlock_irqrestore(&usbhid->outlock, flags);
 347                 return;
 348         }
 349
 350         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 351         spin_unlock_irqrestore(&usbhid->outlock, flags);
 352         wake_up(&hid->wait);
 353 }
 354
 355 /*
 356  * Control pipe completion handler.
 357  */
 358
 359 static void hid_ctrl(struct urb *urb)
 360 {
 361         struct hid_device *hid = urb->context;
 362         struct usbhid_device *usbhid = hid->driver_data;
 363         unsigned long flags;
 364         int unplug = 0;
 365
 366         spin_lock_irqsave(&usbhid->ctrllock, flags);
 367
 368         switch (urb->status) {
 369                 case 0:                 /* success */
 370                         if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
 371                                 hid_input_report(urb->context, usbhid->ctrl[usbhid->ctrltail].report->type,
 372                                                 urb->transfer_buffer, urb->actual_length, 0);
 373                         break;
 374                 case -ESHUTDOWN:        /* unplug */
 375                         unplug = 1;
 376                 case -EILSEQ:           /* protocol error or unplug */
 377                 case -EPROTO:           /* protocol error or unplug */
 378                 case -ECONNRESET:       /* unlink */
 379                 case -ENOENT:
 380                 case -EPIPE:            /* report not available */
 381                         break;
 382                 default:                /* error */
 383                         warn("ctrl urb status %d received", urb->status);
 384         }
 385
 386         if (unplug)
 387                 usbhid->ctrltail = usbhid->ctrlhead;
 388         else
 389                 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
 390
 391         if (usbhid->ctrlhead != usbhid->ctrltail) {
 392                 if (hid_submit_ctrl(hid)) {
 393                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 394                         wake_up(&hid->wait);
 395                 }
 396                 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
 397                 return;
 398         }
 399
 400         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 401         spin_unlock_irqrestore(&usbhid->ctrllock, flags);
 402         wake_up(&hid->wait);
 403 }
 404
 405 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
 406 {
 407         int head;
 408         unsigned long flags;
 409         struct usbhid_device *usbhid = hid->driver_data;
 410
 411         if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
 412                 return;
 413
 414         if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
 415
 416                 spin_lock_irqsave(&usbhid->outlock, flags);
 417
 418                 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
 419                         spin_unlock_irqrestore(&usbhid->outlock, flags);
 420                         warn("output queue full");
 421                         return;
 422                 }
 423
 424                 usbhid->out[usbhid->outhead] = report;
 425                 usbhid->outhead = head;
 426
 427                 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl))
 428                         if (hid_submit_out(hid))
 429                                 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 430
 431                 spin_unlock_irqrestore(&usbhid->outlock, flags);
 432                 return;
 433         }
 434
 435         spin_lock_irqsave(&usbhid->ctrllock, flags);
 436
 437         if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
 438                 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
 439                 warn("control queue full");
 440                 return;
 441         }
 442
 443         usbhid->ctrl[usbhid->ctrlhead].report = report;
 444         usbhid->ctrl[usbhid->ctrlhead].dir = dir;
 445         usbhid->ctrlhead = head;
 446
 447         if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
 448                 if (hid_submit_ctrl(hid))
 449                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 450
 451         spin_unlock_irqrestore(&usbhid->ctrllock, flags);
 452 }
 453
 454 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
 455 {
 456         struct hid_device *hid = input_get_drvdata(dev);
 457         struct hid_field *field;
 458         int offset;
 459
 460         if (type == EV_FF)
 461                 return input_ff_event(dev, type, code, value);
 462
 463         if (type != EV_LED)
 464                 return -1;
 465
 466         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
 467                 warn("event field not found");
 468                 return -1;
 469         }
 470
 471         hid_set_field(field, offset, value);
 472         usbhid_submit_report(hid, field->report, USB_DIR_OUT);
 473
 474         return 0;
 475 }
 476
 477 int usbhid_wait_io(struct hid_device *hid)
 478 {
 479         struct usbhid_device *usbhid = hid->driver_data;
 480
 481         if (!wait_event_timeout(hid->wait, (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
 482                                         !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
 483                                         10*HZ)) {
 484                 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
 485                 return -1;
 486         }
 487
 488         return 0;
 489 }
 490
 491 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
 492 {
 493         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 494                 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
 495                 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
 496 }
 497
 498 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
 499                 unsigned char type, void *buf, int size)
 500 {
 501         int result, retries = 4;
 502
 503         memset(buf, 0, size);
 504
 505         do {
 506                 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 507                                 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
 508                                 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
 509                 retries--;
 510         } while (result < size && retries);
 511         return result;
 512 }
 513
 514 int usbhid_open(struct hid_device *hid)
 515 {
 516         struct usbhid_device *usbhid = hid->driver_data;
 517         int res;
 518
 519         if (!hid->open++) {
 520                 res = usb_autopm_get_interface(usbhid->intf);
 521                 if (res < 0) {
 522                         hid->open--;
 523                         return -EIO;
 524                 }
 525         }
 526         if (hid_start_in(hid))
 527                 hid_io_error(hid);
 528         return 0;
 529 }
 530
 531 void usbhid_close(struct hid_device *hid)
 532 {
 533         struct usbhid_device *usbhid = hid->driver_data;
 534
 535         if (!--hid->open) {
 536                 usb_kill_urb(usbhid->urbin);
 537                 usb_autopm_put_interface(usbhid->intf);
 538         }
 539 }
 540
 541 /*
 542  * Initialize all reports
 543  */
 544
 545 void usbhid_init_reports(struct hid_device *hid)
 546 {
 547         struct hid_report *report;
 548         struct usbhid_device *usbhid = hid->driver_data;
 549         int err, ret;
 550
 551         list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
 552                 usbhid_submit_report(hid, report, USB_DIR_IN);
 553
 554         list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
 555                 usbhid_submit_report(hid, report, USB_DIR_IN);
 556
 557         err = 0;
 558         ret = usbhid_wait_io(hid);
 559         while (ret) {
 560                 err |= ret;
 561                 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
 562                         usb_kill_urb(usbhid->urbctrl);
 563                 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
 564                         usb_kill_urb(usbhid->urbout);
 565                 ret = usbhid_wait_io(hid);
 566         }
 567
 568         if (err)
 569                 warn("timeout initializing reports");
 570 }
 571
 572 /*
 573  * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
 574  */
 575 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
 576     unsigned int hid_code, struct hid_field **pfield)
 577 {
 578         struct hid_report *report;
 579         struct hid_field *field;
 580         struct hid_usage *usage;
 581         int i, j;
 582
 583         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
 584                 for (i = 0; i < report->maxfield; i++) {
 585                         field = report->field[i];
 586                         for (j = 0; j < field->maxusage; j++) {
 587                                 usage = &field->usage[j];
 588                                 if ((usage->hid & HID_USAGE_PAGE) == page &&
 589                                     (usage->hid & 0xFFFF) == hid_code) {
 590                                         *pfield = field;
 591                                         return j;
 592                                 }
 593                         }
 594                 }
 595         }
 596         return -1;
 597 }
 598
 599 static void usbhid_set_leds(struct hid_device *hid)
 600 {
 601         struct hid_field *field;
 602         int offset;
 603
 604         if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
 605                 hid_set_field(field, offset, 0);
 606                 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
 607         }
 608 }
 609
 610 /*
 611  * Traverse the supplied list of reports and find the longest
 612  */
 613 static void hid_find_max_report(struct hid_device *hid, unsigned int type, int *max)
 614 {
 615         struct hid_report *report;
 616         int size;
 617
 618         list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
 619                 size = ((report->size - 1) >> 3) + 1;
 620                 if (type == HID_INPUT_REPORT && hid->report_enum[type].numbered)
 621                         size++;
 622                 if (*max < size)
 623                         *max = size;
 624         }
 625 }
 626
 627 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
 628 {
 629         struct usbhid_device *usbhid = hid->driver_data;
 630
 631         if (!(usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->inbuf_dma)))
 632                 return -1;
 633         if (!(usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->outbuf_dma)))
 634                 return -1;
 635         if (!(usbhid->cr = usb_buffer_alloc(dev, sizeof(*(usbhid->cr)), GFP_ATOMIC, &usbhid->cr_dma)))
 636                 return -1;
 637         if (!(usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->ctrlbuf_dma)))
 638                 return -1;
 639
 640         return 0;
 641 }
 642
 643 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
 644 {
 645         struct usbhid_device *usbhid = hid->driver_data;
 646         struct usb_device *dev = hid_to_usb_dev(hid);
 647         struct usb_interface *intf = usbhid->intf;
 648         struct usb_host_interface *interface = intf->cur_altsetting;
 649         int ret;
 650
 651         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 652                 HID_REQ_SET_REPORT,
 653                 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 654                 cpu_to_le16(((HID_OUTPUT_REPORT + 1) << 8) | *buf),
 655                 interface->desc.bInterfaceNumber, buf + 1, count - 1,
 656                 USB_CTRL_SET_TIMEOUT);
 657
 658         /* count also the report id */
 659         if (ret > 0)
 660                 ret++;
 661
 662         return ret;
 663 }
 664
 665 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
 666 {
 667         struct usbhid_device *usbhid = hid->driver_data;
 668
 669         usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
 670         usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
 671         usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
 672         usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
 673 }
 674
 675 /*
 676  * Sending HID_REQ_GET_REPORT changes the operation mode of the ps3 controller
 677  * to "operational".  Without this, the ps3 controller will not report any
 678  * events.
 679  */
 680 static void hid_fixup_sony_ps3_controller(struct usb_device *dev, int ifnum)
 681 {
 682         int result;
 683         char *buf = kmalloc(18, GFP_KERNEL);
 684
 685         if (!buf)
 686                 return;
 687
 688         result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 689                                  HID_REQ_GET_REPORT,
 690                                  USB_DIR_IN | USB_TYPE_CLASS |
 691                                  USB_RECIP_INTERFACE,
 692                                  (3 << 8) | 0xf2, ifnum, buf, 17,
 693                                  USB_CTRL_GET_TIMEOUT);
 694
 695         if (result < 0)
 696                 err_hid("%s failed: %d\n", __func__, result);
 697
 698         kfree(buf);
 699 }
 700
 701 static struct hid_device *usb_hid_configure(struct usb_interface *intf)
 702 {
 703         struct usb_host_interface *interface = intf->cur_altsetting;
 704         struct usb_device *dev = interface_to_usbdev (intf);
 705         struct hid_descriptor *hdesc;
 706         struct hid_device *hid;
 707         u32 quirks = 0;
 708         unsigned rsize = 0;
 709         char *rdesc;
 710         int n, len, insize = 0;
 711         struct usbhid_device *usbhid;
 712
 713         quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
 714                         le16_to_cpu(dev->descriptor.idProduct));
 715
 716         /* Many keyboards and mice don't like to be polled for reports,
 717          * so we will always set the HID_QUIRK_NOGET flag for them. */
 718         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
 719                 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
 720                         interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
 721                                 quirks |= HID_QUIRK_NOGET;
 722         }
 723
 724         if (quirks & HID_QUIRK_IGNORE)
 725                 return NULL;
 726
 727         if ((quirks & HID_QUIRK_IGNORE_MOUSE) &&
 728                 (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE))
 729                         return NULL;
 730
 731
 732         if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
 733             (!interface->desc.bNumEndpoints ||
 734              usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
 735                 dbg_hid("class descriptor not present\n");
 736                 return NULL;
 737         }
 738
 739         for (n = 0; n < hdesc->bNumDescriptors; n++)
 740                 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
 741                         rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
 742
 743         if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
 744                 dbg_hid("weird size of report descriptor (%u)\n", rsize);
 745                 return NULL;
 746         }
 747
 748         if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
 749                 dbg_hid("couldn't allocate rdesc memory\n");
 750                 return NULL;
 751         }
 752
 753         hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
 754
 755         if ((n = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber, HID_DT_REPORT, rdesc, rsize)) < 0) {
 756                 dbg_hid("reading report descriptor failed\n");
 757                 kfree(rdesc);
 758                 return NULL;
 759         }
 760
 761         usbhid_fixup_report_descriptor(le16_to_cpu(dev->descriptor.idVendor),
 762                         le16_to_cpu(dev->descriptor.idProduct), rdesc,
 763                         rsize, rdesc_quirks_param);
 764
 765         dbg_hid("report descriptor (size %u, read %d) = ", rsize, n);
 766         for (n = 0; n < rsize; n++)
 767                 dbg_hid_line(" %02x", (unsigned char) rdesc[n]);
 768         dbg_hid_line("\n");
 769
 770         if (!(hid = hid_parse_report(rdesc, n))) {
 771                 dbg_hid("parsing report descriptor failed\n");
 772                 kfree(rdesc);
 773                 return NULL;
 774         }
 775
 776         kfree(rdesc);
 777         hid->quirks = quirks;
 778
 779         if (!(usbhid = kzalloc(sizeof(struct usbhid_device), GFP_KERNEL)))
 780                 goto fail_no_usbhid;
 781
 782         hid->driver_data = usbhid;
 783         usbhid->hid = hid;
 784
 785         usbhid->bufsize = HID_MIN_BUFFER_SIZE;
 786         hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
 787         hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
 788         hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
 789
 790         if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
 791                 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
 792
 793         hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
 794
 795         if (insize > HID_MAX_BUFFER_SIZE)
 796                 insize = HID_MAX_BUFFER_SIZE;
 797
 798         if (hid_alloc_buffers(dev, hid)) {
 799                 hid_free_buffers(dev, hid);
 800                 goto fail;
 801         }
 802
 803         for (n = 0; n < interface->desc.bNumEndpoints; n++) {
 804
 805                 struct usb_endpoint_descriptor *endpoint;
 806                 int pipe;
 807                 int interval;
 808
 809                 endpoint = &interface->endpoint[n].desc;
 810                 if ((endpoint->bmAttributes & 3) != 3)          /* Not an interrupt endpoint */
 811                         continue;
 812
 813                 interval = endpoint->bInterval;
 814
 815                 /* Change the polling interval of mice. */
 816                 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
 817                         interval = hid_mousepoll_interval;
 818
 819                 if (usb_endpoint_dir_in(endpoint)) {
 820                         if (usbhid->urbin)
 821                                 continue;
 822                         if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
 823                                 goto fail;
 824                         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 825                         usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
 826                                          hid_irq_in, hid, interval);
 827                         usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
 828                         usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 829                 } else {
 830                         if (usbhid->urbout)
 831                                 continue;
 832                         if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
 833                                 goto fail;
 834                         pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
 835                         usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
 836                                          hid_irq_out, hid, interval);
 837                         usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
 838                         usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 839                 }
 840         }
 841
 842         if (!usbhid->urbin) {
 843                 err_hid("couldn't find an input interrupt endpoint");
 844                 goto fail;
 845         }
 846
 847         init_waitqueue_head(&hid->wait);
 848
 849         INIT_WORK(&usbhid->reset_work, hid_reset);
 850         setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
 851
 852         spin_lock_init(&usbhid->inlock);
 853         spin_lock_init(&usbhid->outlock);
 854         spin_lock_init(&usbhid->ctrllock);
 855
 856         hid->version = le16_to_cpu(hdesc->bcdHID);
 857         hid->country = hdesc->bCountryCode;
 858         hid->dev = &intf->dev;
 859         usbhid->intf = intf;
 860         usbhid->ifnum = interface->desc.bInterfaceNumber;
 861
 862         hid->name[0] = 0;
 863
 864         if (dev->manufacturer)
 865                 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
 866
 867         if (dev->product) {
 868                 if (dev->manufacturer)
 869                         strlcat(hid->name, " ", sizeof(hid->name));
 870                 strlcat(hid->name, dev->product, sizeof(hid->name));
 871         }
 872
 873         if (!strlen(hid->name))
 874                 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
 875                          le16_to_cpu(dev->descriptor.idVendor),
 876                          le16_to_cpu(dev->descriptor.idProduct));
 877
 878         hid->bus = BUS_USB;
 879         hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
 880         hid->product = le16_to_cpu(dev->descriptor.idProduct);
 881
 882         usb_make_path(dev, hid->phys, sizeof(hid->phys));
 883         strlcat(hid->phys, "/input", sizeof(hid->phys));
 884         len = strlen(hid->phys);
 885         if (len < sizeof(hid->phys) - 1)
 886                 snprintf(hid->phys + len, sizeof(hid->phys) - len,
 887                          "%d", intf->altsetting[0].desc.bInterfaceNumber);
 888
 889         if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
 890                 hid->uniq[0] = 0;
 891
 892         usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
 893         if (!usbhid->urbctrl)
 894                 goto fail;
 895
 896         usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
 897                              usbhid->ctrlbuf, 1, hid_ctrl, hid);
 898         usbhid->urbctrl->setup_dma = usbhid->cr_dma;
 899         usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
 900         usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
 901         hid->hidinput_input_event = usb_hidinput_input_event;
 902         hid->hid_open = usbhid_open;
 903         hid->hid_close = usbhid_close;
 904 #ifdef CONFIG_USB_HIDDEV
 905         hid->hiddev_hid_event = hiddev_hid_event;
 906         hid->hiddev_report_event = hiddev_report_event;
 907 #endif
 908         hid->hid_output_raw_report = usbhid_output_raw_report;
 909         return hid;
 910
 911 fail:
 912         usb_free_urb(usbhid->urbin);
 913         usb_free_urb(usbhid->urbout);
 914         usb_free_urb(usbhid->urbctrl);
 915         hid_free_buffers(dev, hid);
 916         kfree(usbhid);
 917 fail_no_usbhid:
 918         hid_free_device(hid);
 919
 920         return NULL;
 921 }
 922
 923 static void hid_disconnect(struct usb_interface *intf)
 924 {
 925         struct hid_device *hid = usb_get_intfdata (intf);
 926         struct usbhid_device *usbhid;
 927
 928         if (!hid)
 929                 return;
 930
 931         usbhid = hid->driver_data;
 932
 933         spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
 934         usb_set_intfdata(intf, NULL);
 935         spin_unlock_irq(&usbhid->inlock);
 936         usb_kill_urb(usbhid->urbin);
 937         usb_kill_urb(usbhid->urbout);
 938         usb_kill_urb(usbhid->urbctrl);
 939
 940         del_timer_sync(&usbhid->io_retry);
 941         cancel_work_sync(&usbhid->reset_work);
 942
 943         if (hid->claimed & HID_CLAIMED_INPUT)
 944                 hidinput_disconnect(hid);
 945         if (hid->claimed & HID_CLAIMED_HIDDEV)
 946                 hiddev_disconnect(hid);
 947         if (hid->claimed & HID_CLAIMED_HIDRAW)
 948                 hidraw_disconnect(hid);
 949
 950         usb_free_urb(usbhid->urbin);
 951         usb_free_urb(usbhid->urbctrl);
 952         usb_free_urb(usbhid->urbout);
 953
 954         hid_free_buffers(hid_to_usb_dev(hid), hid);
 955         kfree(usbhid);
 956         hid_free_device(hid);
 957 }
 958
 959 static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
 960 {
 961         struct hid_device *hid;
 962         char path[64];
 963         int i;
 964         char *c;
 965
 966         dbg_hid("HID probe called for ifnum %d\n",
 967                         intf->altsetting->desc.bInterfaceNumber);
 968
 969         if (!(hid = usb_hid_configure(intf)))
 970                 return -ENODEV;
 971
 972         usbhid_init_reports(hid);
 973         hid_dump_device(hid);
 974         if (hid->quirks & HID_QUIRK_RESET_LEDS)
 975                 usbhid_set_leds(hid);
 976
 977         if (!hidinput_connect(hid))
 978                 hid->claimed |= HID_CLAIMED_INPUT;
 979         if (!hiddev_connect(hid))
 980                 hid->claimed |= HID_CLAIMED_HIDDEV;
 981         if (!hidraw_connect(hid))
 982                 hid->claimed |= HID_CLAIMED_HIDRAW;
 983
 984         usb_set_intfdata(intf, hid);
 985
 986         if (!hid->claimed) {
 987                 printk ("HID device claimed by neither input, hiddev nor hidraw\n");
 988                 hid_disconnect(intf);
 989                 return -ENODEV;
 990         }
 991
 992         if ((hid->claimed & HID_CLAIMED_INPUT))
 993                 hid_ff_init(hid);
 994
 995         if (hid->quirks & HID_QUIRK_SONY_PS3_CONTROLLER)
 996                 hid_fixup_sony_ps3_controller(interface_to_usbdev(intf),
 997                         intf->cur_altsetting->desc.bInterfaceNumber);
 998
 999         printk(KERN_INFO);
1000
1001         if (hid->claimed & HID_CLAIMED_INPUT)
1002                 printk("input");
1003         if ((hid->claimed & HID_CLAIMED_INPUT) && ((hid->claimed & HID_CLAIMED_HIDDEV) ||
1004                                 hid->claimed & HID_CLAIMED_HIDRAW))
1005                 printk(",");
1006         if (hid->claimed & HID_CLAIMED_HIDDEV)
1007                 printk("hiddev%d", hid->minor);
1008         if ((hid->claimed & HID_CLAIMED_INPUT) && (hid->claimed & HID_CLAIMED_HIDDEV) &&
1009                         (hid->claimed & HID_CLAIMED_HIDRAW))
1010                 printk(",");
1011         if (hid->claimed & HID_CLAIMED_HIDRAW)
1012                 printk("hidraw%d", ((struct hidraw*)hid->hidraw)->minor);
1013
1014         c = "Device";
1015         for (i = 0; i < hid->maxcollection; i++) {
1016                 if (hid->collection[i].type == HID_COLLECTION_APPLICATION &&
1017                     (hid->collection[i].usage & HID_USAGE_PAGE) == HID_UP_GENDESK &&
1018                     (hid->collection[i].usage & 0xffff) < ARRAY_SIZE(hid_types)) {
1019                         c = hid_types[hid->collection[i].usage & 0xffff];
1020                         break;
1021                 }
1022         }
1023
1024         usb_make_path(interface_to_usbdev(intf), path, 63);
1025
1026         printk(": USB HID v%x.%02x %s [%s] on %s\n",
1027                 hid->version >> 8, hid->version & 0xff, c, hid->name, path);
1028
1029         return 0;
1030 }
1031
1032 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1033 {
1034         struct hid_device *hid = usb_get_intfdata (intf);
1035         struct usbhid_device *usbhid = hid->driver_data;
1036
1037         spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
1038         set_bit(HID_SUSPENDED, &usbhid->iofl);
1039         spin_unlock_irq(&usbhid->inlock);
1040         del_timer(&usbhid->io_retry);
1041         usb_kill_urb(usbhid->urbin);
1042         dev_dbg(&intf->dev, "suspend\n");
1043         return 0;
1044 }
1045
1046 static int hid_resume(struct usb_interface *intf)
1047 {
1048         struct hid_device *hid = usb_get_intfdata (intf);
1049         struct usbhid_device *usbhid = hid->driver_data;
1050         int status;
1051
1052         clear_bit(HID_SUSPENDED, &usbhid->iofl);
1053         usbhid->retry_delay = 0;
1054         status = hid_start_in(hid);
1055         dev_dbg(&intf->dev, "resume status %d\n", status);
1056         return status;
1057 }
1058
1059 /* Treat USB reset pretty much the same as suspend/resume */
1060 static int hid_pre_reset(struct usb_interface *intf)
1061 {
1062         /* FIXME: What if the interface is already suspended? */
1063         hid_suspend(intf, PMSG_ON);
1064         return 0;
1065 }
1066
1067 /* Same routine used for post_reset and reset_resume */
1068 static int hid_post_reset(struct usb_interface *intf)
1069 {
1070         struct usb_device *dev = interface_to_usbdev (intf);
1071
1072         hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1073         /* FIXME: Any more reinitialization needed? */
1074
1075         return hid_resume(intf);
1076 }
1077
1078 static struct usb_device_id hid_usb_ids [] = {
1079         { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1080                 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1081         { }                                             /* Terminating entry */
1082 };
1083
1084 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1085
1086 static struct usb_driver hid_driver = {
1087         .name =         "usbhid",
1088         .probe =        hid_probe,
1089         .disconnect =   hid_disconnect,
1090         .suspend =      hid_suspend,
1091         .resume =       hid_resume,
1092         .reset_resume = hid_post_reset,
1093         .pre_reset =    hid_pre_reset,
1094         .post_reset =   hid_post_reset,
1095         .id_table =     hid_usb_ids,
1096         .supports_autosuspend = 1,
1097 };
1098
1099 static int __init hid_init(void)
1100 {
1101         int retval;
1102         retval = usbhid_quirks_init(quirks_param);
1103         if (retval)
1104                 goto usbhid_quirks_init_fail;
1105         retval = hiddev_init();
1106         if (retval)
1107                 goto hiddev_init_fail;
1108         retval = usb_register(&hid_driver);
1109         if (retval)
1110                 goto usb_register_fail;
1111         info(DRIVER_VERSION ":" DRIVER_DESC);
1112
1113         return 0;
1114 usb_register_fail:
1115         hiddev_exit();
1116 hiddev_init_fail:
1117         usbhid_quirks_exit();
1118 usbhid_quirks_init_fail:
1119         return retval;
1120 }
1121
1122 static void __exit hid_exit(void)
1123 {
1124         usb_deregister(&hid_driver);
1125         hiddev_exit();
1126         usbhid_quirks_exit();
1127 }
1128
1129 module_init(hid_init);
1130 module_exit(hid_exit);
1131
1132 MODULE_AUTHOR(DRIVER_AUTHOR);
1133 MODULE_DESCRIPTION(DRIVER_DESC);
1134 MODULE_LICENSE(DRIVER_LICENSE);