HID: update copyright
[linux-3.10.git] / drivers / hid / usbhid / hid-core.c
1 /*
2  *  USB HID support for Linux
3  *
4  *  Copyright (c) 1999 Andreas Gal
5  *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
6  *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
7  *  Copyright (c) 2007-2008 Oliver Neukum
8  *  Copyright (c) 2006-2010 Jiri Kosina
9  */
10
11 /*
12  * This program is free software; you can redistribute it and/or modify it
13  * under the terms of the GNU General Public License as published by the Free
14  * Software Foundation; either version 2 of the License, or (at your option)
15  * any later version.
16  */
17
18 #include <linux/module.h>
19 #include <linux/slab.h>
20 #include <linux/init.h>
21 #include <linux/kernel.h>
22 #include <linux/list.h>
23 #include <linux/mm.h>
24 #include <linux/mutex.h>
25 #include <linux/spinlock.h>
26 #include <asm/unaligned.h>
27 #include <asm/byteorder.h>
28 #include <linux/input.h>
29 #include <linux/wait.h>
30 #include <linux/workqueue.h>
31
32 #include <linux/usb.h>
33
34 #include <linux/hid.h>
35 #include <linux/hiddev.h>
36 #include <linux/hid-debug.h>
37 #include <linux/hidraw.h>
38 #include "usbhid.h"
39
40 /*
41  * Version Information
42  */
43
44 #define DRIVER_DESC "USB HID core driver"
45 #define DRIVER_LICENSE "GPL"
46
47 /*
48  * Module parameters.
49  */
50
51 static unsigned int hid_mousepoll_interval;
52 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
53 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
54
55 static unsigned int ignoreled;
56 module_param_named(ignoreled, ignoreled, uint, 0644);
57 MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds");
58
59 /* Quirks specified at module load time */
60 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
61 module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
62 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
63                 " quirks=vendorID:productID:quirks"
64                 " where vendorID, productID, and quirks are all in"
65                 " 0x-prefixed hex");
66 /*
67  * Input submission and I/O error handler.
68  */
69 static DEFINE_MUTEX(hid_open_mut);
70 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         struct usb_device *udev = interface_to_usbdev(intf);
1257         int status;
1258
1259         if (udev->auto_pm) {
1260                 spin_lock_irq(&usbhid->lock);   /* Sync with error handler */
1261                 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1262                     && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1263                     && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1264                     && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1265                     && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1266                     && (!usbhid->ledcount || ignoreled))
1267                 {
1268                         set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1269                         spin_unlock_irq(&usbhid->lock);
1270                 } else {
1271                         usbhid_mark_busy(usbhid);
1272                         spin_unlock_irq(&usbhid->lock);
1273                         return -EBUSY;
1274                 }
1275
1276         } else {
1277                 spin_lock_irq(&usbhid->lock);
1278                 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1279                 spin_unlock_irq(&usbhid->lock);
1280                 if (usbhid_wait_io(hid) < 0)
1281                         return -EIO;
1282         }
1283
1284         if (!ignoreled && udev->auto_pm) {
1285                 spin_lock_irq(&usbhid->lock);
1286                 if (test_bit(HID_LED_ON, &usbhid->iofl)) {
1287                         spin_unlock_irq(&usbhid->lock);
1288                         usbhid_mark_busy(usbhid);
1289                         return -EBUSY;
1290                 }
1291                 spin_unlock_irq(&usbhid->lock);
1292         }
1293
1294         hid_cancel_delayed_stuff(usbhid);
1295         hid_cease_io(usbhid);
1296
1297         if (udev->auto_pm && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1298                 /* lost race against keypresses */
1299                 status = hid_start_in(hid);
1300                 if (status < 0)
1301                         hid_io_error(hid);
1302                 usbhid_mark_busy(usbhid);
1303                 return -EBUSY;
1304         }
1305         dev_dbg(&intf->dev, "suspend\n");
1306         return 0;
1307 }
1308
1309 static int hid_resume(struct usb_interface *intf)
1310 {
1311         struct hid_device *hid = usb_get_intfdata (intf);
1312         struct usbhid_device *usbhid = hid->driver_data;
1313         int status;
1314
1315         if (!test_bit(HID_STARTED, &usbhid->iofl))
1316                 return 0;
1317
1318         clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1319         usbhid_mark_busy(usbhid);
1320
1321         if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1322             test_bit(HID_RESET_PENDING, &usbhid->iofl))
1323                 schedule_work(&usbhid->reset_work);
1324         usbhid->retry_delay = 0;
1325         status = hid_start_in(hid);
1326         if (status < 0)
1327                 hid_io_error(hid);
1328         usbhid_restart_queues(usbhid);
1329
1330         dev_dbg(&intf->dev, "resume status %d\n", status);
1331         return 0;
1332 }
1333
1334 static int hid_reset_resume(struct usb_interface *intf)
1335 {
1336         struct hid_device *hid = usb_get_intfdata(intf);
1337         struct usbhid_device *usbhid = hid->driver_data;
1338
1339         clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1340         return hid_post_reset(intf);
1341 }
1342
1343 #endif /* CONFIG_PM */
1344
1345 static const 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);