Merge branches 'ntrig', 'picolcd', 'prodikeys' and 'roccat-kone' into for-linus
[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                 usbhid->last_out = jiffies;
320         } else {
321                 /*
322                  * queue work to wake up the device.
323                  * as the work queue is freezeable, this is safe
324                  * with respect to STD and STR
325                  */
326                 queue_work(resumption_waker, &usbhid->restart_work);
327         }
328
329         return 0;
330 }
331
332 static int hid_submit_ctrl(struct hid_device *hid)
333 {
334         struct hid_report *report;
335         unsigned char dir;
336         char *raw_report;
337         int len;
338         struct usbhid_device *usbhid = hid->driver_data;
339
340         report = usbhid->ctrl[usbhid->ctrltail].report;
341         raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
342         dir = usbhid->ctrl[usbhid->ctrltail].dir;
343
344         if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
345                 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
346                 if (dir == USB_DIR_OUT) {
347                         usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
348                         usbhid->urbctrl->transfer_buffer_length = len;
349                         memcpy(usbhid->ctrlbuf, raw_report, len);
350                         kfree(raw_report);
351                 } else {
352                         int maxpacket, padlen;
353
354                         usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
355                         maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
356                         if (maxpacket > 0) {
357                                 padlen = DIV_ROUND_UP(len, maxpacket);
358                                 padlen *= maxpacket;
359                                 if (padlen > usbhid->bufsize)
360                                         padlen = usbhid->bufsize;
361                         } else
362                                 padlen = 0;
363                         usbhid->urbctrl->transfer_buffer_length = padlen;
364                 }
365                 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
366
367                 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
368                 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
369                 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
370                 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
371                 usbhid->cr->wLength = cpu_to_le16(len);
372
373                 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
374                         usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
375                         usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
376
377                 if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
378                         err_hid("usb_submit_urb(ctrl) failed");
379                         return -1;
380                 }
381                 usbhid->last_ctrl = jiffies;
382         } else {
383                 /*
384                  * queue work to wake up the device.
385                  * as the work queue is freezeable, this is safe
386                  * with respect to STD and STR
387                  */
388                 queue_work(resumption_waker, &usbhid->restart_work);
389         }
390
391         return 0;
392 }
393
394 /*
395  * Output interrupt completion handler.
396  */
397
398 static void hid_irq_out(struct urb *urb)
399 {
400         struct hid_device *hid = urb->context;
401         struct usbhid_device *usbhid = hid->driver_data;
402         unsigned long flags;
403         int unplug = 0;
404
405         switch (urb->status) {
406         case 0:                 /* success */
407                 break;
408         case -ESHUTDOWN:        /* unplug */
409                 unplug = 1;
410         case -EILSEQ:           /* protocol error or unplug */
411         case -EPROTO:           /* protocol error or unplug */
412         case -ECONNRESET:       /* unlink */
413         case -ENOENT:
414                 break;
415         default:                /* error */
416                 dev_warn(&urb->dev->dev, "output irq status %d "
417                                 "received\n", urb->status);
418         }
419
420         spin_lock_irqsave(&usbhid->lock, flags);
421
422         if (unplug)
423                 usbhid->outtail = usbhid->outhead;
424         else
425                 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
426
427         if (usbhid->outhead != usbhid->outtail) {
428                 if (hid_submit_out(hid)) {
429                         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
430                         wake_up(&usbhid->wait);
431                 }
432                 spin_unlock_irqrestore(&usbhid->lock, flags);
433                 return;
434         }
435
436         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
437         spin_unlock_irqrestore(&usbhid->lock, flags);
438         wake_up(&usbhid->wait);
439 }
440
441 /*
442  * Control pipe completion handler.
443  */
444
445 static void hid_ctrl(struct urb *urb)
446 {
447         struct hid_device *hid = urb->context;
448         struct usbhid_device *usbhid = hid->driver_data;
449         int unplug = 0, status = urb->status;
450
451         spin_lock(&usbhid->lock);
452
453         switch (status) {
454         case 0:                 /* success */
455                 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
456                         hid_input_report(urb->context,
457                                 usbhid->ctrl[usbhid->ctrltail].report->type,
458                                 urb->transfer_buffer, urb->actual_length, 0);
459                 break;
460         case -ESHUTDOWN:        /* unplug */
461                 unplug = 1;
462         case -EILSEQ:           /* protocol error or unplug */
463         case -EPROTO:           /* protocol error or unplug */
464         case -ECONNRESET:       /* unlink */
465         case -ENOENT:
466         case -EPIPE:            /* report not available */
467                 break;
468         default:                /* error */
469                 dev_warn(&urb->dev->dev, "ctrl urb status %d "
470                                 "received\n", status);
471         }
472
473         if (unplug)
474                 usbhid->ctrltail = usbhid->ctrlhead;
475         else
476                 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
477
478         if (usbhid->ctrlhead != usbhid->ctrltail) {
479                 if (hid_submit_ctrl(hid)) {
480                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
481                         wake_up(&usbhid->wait);
482                 }
483                 spin_unlock(&usbhid->lock);
484                 return;
485         }
486
487         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
488         spin_unlock(&usbhid->lock);
489         wake_up(&usbhid->wait);
490 }
491
492 static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
493                                    unsigned char dir)
494 {
495         int head;
496         struct usbhid_device *usbhid = hid->driver_data;
497         int len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
498
499         if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
500                 return;
501
502         if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
503                 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
504                         dev_warn(&hid->dev, "output queue full\n");
505                         return;
506                 }
507
508                 usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC);
509                 if (!usbhid->out[usbhid->outhead].raw_report) {
510                         dev_warn(&hid->dev, "output queueing failed\n");
511                         return;
512                 }
513                 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
514                 usbhid->out[usbhid->outhead].report = report;
515                 usbhid->outhead = head;
516
517                 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl)) {
518                         if (hid_submit_out(hid))
519                                 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
520                 } else {
521                         /*
522                          * the queue is known to run
523                          * but an earlier request may be stuck
524                          * we may need to time out
525                          * no race because this is called under
526                          * spinlock
527                          */
528                         if (time_after(jiffies, usbhid->last_out + HZ * 5))
529                                 usb_unlink_urb(usbhid->urbout);
530                 }
531                 return;
532         }
533
534         if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
535                 dev_warn(&hid->dev, "control queue full\n");
536                 return;
537         }
538
539         if (dir == USB_DIR_OUT) {
540                 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC);
541                 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
542                         dev_warn(&hid->dev, "control queueing failed\n");
543                         return;
544                 }
545                 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
546         }
547         usbhid->ctrl[usbhid->ctrlhead].report = report;
548         usbhid->ctrl[usbhid->ctrlhead].dir = dir;
549         usbhid->ctrlhead = head;
550
551         if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl)) {
552                 if (hid_submit_ctrl(hid))
553                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
554         } else {
555                 /*
556                  * the queue is known to run
557                  * but an earlier request may be stuck
558                  * we may need to time out
559                  * no race because this is called under
560                  * spinlock
561                  */
562                 if (time_after(jiffies, usbhid->last_ctrl + HZ * 5))
563                         usb_unlink_urb(usbhid->urbctrl);
564         }
565 }
566
567 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
568 {
569         struct usbhid_device *usbhid = hid->driver_data;
570         unsigned long flags;
571
572         spin_lock_irqsave(&usbhid->lock, flags);
573         __usbhid_submit_report(hid, report, dir);
574         spin_unlock_irqrestore(&usbhid->lock, flags);
575 }
576 EXPORT_SYMBOL_GPL(usbhid_submit_report);
577
578 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
579 {
580         struct hid_device *hid = input_get_drvdata(dev);
581         struct usbhid_device *usbhid = hid->driver_data;
582         struct hid_field *field;
583         unsigned long flags;
584         int offset;
585
586         if (type == EV_FF)
587                 return input_ff_event(dev, type, code, value);
588
589         if (type != EV_LED)
590                 return -1;
591
592         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
593                 dev_warn(&dev->dev, "event field not found\n");
594                 return -1;
595         }
596
597         hid_set_field(field, offset, value);
598         if (value) {
599                 spin_lock_irqsave(&usbhid->lock, flags);
600                 usbhid->ledcount++;
601                 spin_unlock_irqrestore(&usbhid->lock, flags);
602         } else {
603                 spin_lock_irqsave(&usbhid->lock, flags);
604                 usbhid->ledcount--;
605                 spin_unlock_irqrestore(&usbhid->lock, flags);
606         }
607         usbhid_submit_report(hid, field->report, USB_DIR_OUT);
608
609         return 0;
610 }
611
612 int usbhid_wait_io(struct hid_device *hid)
613 {
614         struct usbhid_device *usbhid = hid->driver_data;
615
616         if (!wait_event_timeout(usbhid->wait,
617                                 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
618                                 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
619                                         10*HZ)) {
620                 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
621                 return -1;
622         }
623
624         return 0;
625 }
626 EXPORT_SYMBOL_GPL(usbhid_wait_io);
627
628 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
629 {
630         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
631                 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
632                 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
633 }
634
635 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
636                 unsigned char type, void *buf, int size)
637 {
638         int result, retries = 4;
639
640         memset(buf, 0, size);
641
642         do {
643                 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
644                                 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
645                                 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
646                 retries--;
647         } while (result < size && retries);
648         return result;
649 }
650
651 int usbhid_open(struct hid_device *hid)
652 {
653         struct usbhid_device *usbhid = hid->driver_data;
654         int res;
655
656         mutex_lock(&hid_open_mut);
657         if (!hid->open++) {
658                 res = usb_autopm_get_interface(usbhid->intf);
659                 /* the device must be awake to reliable request remote wakeup */
660                 if (res < 0) {
661                         hid->open--;
662                         mutex_unlock(&hid_open_mut);
663                         return -EIO;
664                 }
665                 usbhid->intf->needs_remote_wakeup = 1;
666                 if (hid_start_in(hid))
667                         hid_io_error(hid);
668  
669                 usb_autopm_put_interface(usbhid->intf);
670         }
671         mutex_unlock(&hid_open_mut);
672         return 0;
673 }
674
675 void usbhid_close(struct hid_device *hid)
676 {
677         struct usbhid_device *usbhid = hid->driver_data;
678
679         mutex_lock(&hid_open_mut);
680
681         /* protecting hid->open to make sure we don't restart
682          * data acquistion due to a resumption we no longer
683          * care about
684          */
685         spin_lock_irq(&usbhid->lock);
686         if (!--hid->open) {
687                 spin_unlock_irq(&usbhid->lock);
688                 hid_cancel_delayed_stuff(usbhid);
689                 usb_kill_urb(usbhid->urbin);
690                 usbhid->intf->needs_remote_wakeup = 0;
691         } else {
692                 spin_unlock_irq(&usbhid->lock);
693         }
694         mutex_unlock(&hid_open_mut);
695 }
696
697 /*
698  * Initialize all reports
699  */
700
701 void usbhid_init_reports(struct hid_device *hid)
702 {
703         struct hid_report *report;
704         struct usbhid_device *usbhid = hid->driver_data;
705         int err, ret;
706
707         list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
708                 usbhid_submit_report(hid, report, USB_DIR_IN);
709
710         list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
711                 usbhid_submit_report(hid, report, USB_DIR_IN);
712
713         err = 0;
714         ret = usbhid_wait_io(hid);
715         while (ret) {
716                 err |= ret;
717                 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
718                         usb_kill_urb(usbhid->urbctrl);
719                 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
720                         usb_kill_urb(usbhid->urbout);
721                 ret = usbhid_wait_io(hid);
722         }
723
724         if (err)
725                 dev_warn(&hid->dev, "timeout initializing reports\n");
726 }
727
728 /*
729  * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
730  */
731 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
732     unsigned int hid_code, struct hid_field **pfield)
733 {
734         struct hid_report *report;
735         struct hid_field *field;
736         struct hid_usage *usage;
737         int i, j;
738
739         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
740                 for (i = 0; i < report->maxfield; i++) {
741                         field = report->field[i];
742                         for (j = 0; j < field->maxusage; j++) {
743                                 usage = &field->usage[j];
744                                 if ((usage->hid & HID_USAGE_PAGE) == page &&
745                                     (usage->hid & 0xFFFF) == hid_code) {
746                                         *pfield = field;
747                                         return j;
748                                 }
749                         }
750                 }
751         }
752         return -1;
753 }
754
755 void usbhid_set_leds(struct hid_device *hid)
756 {
757         struct hid_field *field;
758         int offset;
759
760         if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
761                 hid_set_field(field, offset, 0);
762                 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
763         }
764 }
765 EXPORT_SYMBOL_GPL(usbhid_set_leds);
766
767 /*
768  * Traverse the supplied list of reports and find the longest
769  */
770 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
771                 unsigned int *max)
772 {
773         struct hid_report *report;
774         unsigned int size;
775
776         list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
777                 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
778                 if (*max < size)
779                         *max = size;
780         }
781 }
782
783 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
784 {
785         struct usbhid_device *usbhid = hid->driver_data;
786
787         usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
788                         &usbhid->inbuf_dma);
789         usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
790                         &usbhid->outbuf_dma);
791         usbhid->cr = usb_buffer_alloc(dev, sizeof(*usbhid->cr), GFP_KERNEL,
792                         &usbhid->cr_dma);
793         usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
794                         &usbhid->ctrlbuf_dma);
795         if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
796                         !usbhid->ctrlbuf)
797                 return -1;
798
799         return 0;
800 }
801
802 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count,
803                 unsigned char report_type)
804 {
805         struct usbhid_device *usbhid = hid->driver_data;
806         struct usb_device *dev = hid_to_usb_dev(hid);
807         struct usb_interface *intf = usbhid->intf;
808         struct usb_host_interface *interface = intf->cur_altsetting;
809         int ret;
810
811         if (usbhid->urbout) {
812                 int actual_length;
813                 int skipped_report_id = 0;
814                 if (buf[0] == 0x0) {
815                         /* Don't send the Report ID */
816                         buf++;
817                         count--;
818                         skipped_report_id = 1;
819                 }
820                 ret = usb_interrupt_msg(dev, usbhid->urbout->pipe,
821                         buf, count, &actual_length,
822                         USB_CTRL_SET_TIMEOUT);
823                 /* return the number of bytes transferred */
824                 if (ret == 0) {
825                         ret = actual_length;
826                         /* count also the report id */
827                         if (skipped_report_id)
828                                 ret++;
829                 }
830         } else {
831                 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
832                         HID_REQ_SET_REPORT,
833                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
834                         ((report_type + 1) << 8) | *buf,
835                         interface->desc.bInterfaceNumber, buf + 1, count - 1,
836                         USB_CTRL_SET_TIMEOUT);
837                 /* count also the report id */
838                 if (ret > 0)
839                         ret++;
840         }
841
842         return ret;
843 }
844
845 static void usbhid_restart_queues(struct usbhid_device *usbhid)
846 {
847         if (usbhid->urbout)
848                 usbhid_restart_out_queue(usbhid);
849         usbhid_restart_ctrl_queue(usbhid);
850 }
851
852 static void __usbhid_restart_queues(struct work_struct *work)
853 {
854         struct usbhid_device *usbhid =
855                 container_of(work, struct usbhid_device, restart_work);
856         int r;
857
858         r = usb_autopm_get_interface(usbhid->intf);
859         if (r < 0)
860                 return;
861         usb_autopm_put_interface(usbhid->intf);
862 }
863
864 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
865 {
866         struct usbhid_device *usbhid = hid->driver_data;
867
868         usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
869         usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
870         usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
871         usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
872 }
873
874 static int usbhid_parse(struct hid_device *hid)
875 {
876         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
877         struct usb_host_interface *interface = intf->cur_altsetting;
878         struct usb_device *dev = interface_to_usbdev (intf);
879         struct hid_descriptor *hdesc;
880         u32 quirks = 0;
881         unsigned int rsize = 0;
882         char *rdesc;
883         int ret, n;
884
885         quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
886                         le16_to_cpu(dev->descriptor.idProduct));
887
888         if (quirks & HID_QUIRK_IGNORE)
889                 return -ENODEV;
890
891         /* Many keyboards and mice don't like to be polled for reports,
892          * so we will always set the HID_QUIRK_NOGET flag for them. */
893         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
894                 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
895                         interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
896                                 quirks |= HID_QUIRK_NOGET;
897         }
898
899         if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
900             (!interface->desc.bNumEndpoints ||
901              usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
902                 dbg_hid("class descriptor not present\n");
903                 return -ENODEV;
904         }
905
906         hid->version = le16_to_cpu(hdesc->bcdHID);
907         hid->country = hdesc->bCountryCode;
908
909         for (n = 0; n < hdesc->bNumDescriptors; n++)
910                 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
911                         rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
912
913         if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
914                 dbg_hid("weird size of report descriptor (%u)\n", rsize);
915                 return -EINVAL;
916         }
917
918         if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
919                 dbg_hid("couldn't allocate rdesc memory\n");
920                 return -ENOMEM;
921         }
922
923         hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
924
925         ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
926                         HID_DT_REPORT, rdesc, rsize);
927         if (ret < 0) {
928                 dbg_hid("reading report descriptor failed\n");
929                 kfree(rdesc);
930                 goto err;
931         }
932
933         ret = hid_parse_report(hid, rdesc, rsize);
934         kfree(rdesc);
935         if (ret) {
936                 dbg_hid("parsing report descriptor failed\n");
937                 goto err;
938         }
939
940         hid->quirks |= quirks;
941
942         return 0;
943 err:
944         return ret;
945 }
946
947 static int usbhid_start(struct hid_device *hid)
948 {
949         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
950         struct usb_host_interface *interface = intf->cur_altsetting;
951         struct usb_device *dev = interface_to_usbdev(intf);
952         struct usbhid_device *usbhid = hid->driver_data;
953         unsigned int n, insize = 0;
954         int ret;
955
956         clear_bit(HID_DISCONNECTED, &usbhid->iofl);
957
958         usbhid->bufsize = HID_MIN_BUFFER_SIZE;
959         hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
960         hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
961         hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
962
963         if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
964                 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
965
966         hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
967
968         if (insize > HID_MAX_BUFFER_SIZE)
969                 insize = HID_MAX_BUFFER_SIZE;
970
971         if (hid_alloc_buffers(dev, hid)) {
972                 ret = -ENOMEM;
973                 goto fail;
974         }
975
976         for (n = 0; n < interface->desc.bNumEndpoints; n++) {
977                 struct usb_endpoint_descriptor *endpoint;
978                 int pipe;
979                 int interval;
980
981                 endpoint = &interface->endpoint[n].desc;
982                 if (!usb_endpoint_xfer_int(endpoint))
983                         continue;
984
985                 interval = endpoint->bInterval;
986
987                 /* Some vendors give fullspeed interval on highspeed devides */
988                 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
989                     dev->speed == USB_SPEED_HIGH) {
990                         interval = fls(endpoint->bInterval*8);
991                         printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
992                                hid->name, endpoint->bInterval, interval);
993                 }
994
995                 /* Change the polling interval of mice. */
996                 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
997                         interval = hid_mousepoll_interval;
998
999                 ret = -ENOMEM;
1000                 if (usb_endpoint_dir_in(endpoint)) {
1001                         if (usbhid->urbin)
1002                                 continue;
1003                         if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
1004                                 goto fail;
1005                         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
1006                         usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
1007                                          hid_irq_in, hid, interval);
1008                         usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
1009                         usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1010                 } else {
1011                         if (usbhid->urbout)
1012                                 continue;
1013                         if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
1014                                 goto fail;
1015                         pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
1016                         usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
1017                                          hid_irq_out, hid, interval);
1018                         usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
1019                         usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1020                 }
1021         }
1022
1023         usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
1024         if (!usbhid->urbctrl) {
1025                 ret = -ENOMEM;
1026                 goto fail;
1027         }
1028
1029         usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
1030                              usbhid->ctrlbuf, 1, hid_ctrl, hid);
1031         usbhid->urbctrl->setup_dma = usbhid->cr_dma;
1032         usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
1033         usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
1034
1035         if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS))
1036                 usbhid_init_reports(hid);
1037
1038         set_bit(HID_STARTED, &usbhid->iofl);
1039
1040         /* Some keyboards don't work until their LEDs have been set.
1041          * Since BIOSes do set the LEDs, it must be safe for any device
1042          * that supports the keyboard boot protocol.
1043          * In addition, enable remote wakeup by default for all keyboard
1044          * devices supporting the boot protocol.
1045          */
1046         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1047                         interface->desc.bInterfaceProtocol ==
1048                                 USB_INTERFACE_PROTOCOL_KEYBOARD) {
1049                 usbhid_set_leds(hid);
1050                 device_set_wakeup_enable(&dev->dev, 1);
1051         }
1052         return 0;
1053
1054 fail:
1055         usb_free_urb(usbhid->urbin);
1056         usb_free_urb(usbhid->urbout);
1057         usb_free_urb(usbhid->urbctrl);
1058         usbhid->urbin = NULL;
1059         usbhid->urbout = NULL;
1060         usbhid->urbctrl = NULL;
1061         hid_free_buffers(dev, hid);
1062         return ret;
1063 }
1064
1065 static void usbhid_stop(struct hid_device *hid)
1066 {
1067         struct usbhid_device *usbhid = hid->driver_data;
1068
1069         if (WARN_ON(!usbhid))
1070                 return;
1071
1072         clear_bit(HID_STARTED, &usbhid->iofl);
1073         spin_lock_irq(&usbhid->lock);   /* Sync with error handler */
1074         set_bit(HID_DISCONNECTED, &usbhid->iofl);
1075         spin_unlock_irq(&usbhid->lock);
1076         usb_kill_urb(usbhid->urbin);
1077         usb_kill_urb(usbhid->urbout);
1078         usb_kill_urb(usbhid->urbctrl);
1079
1080         hid_cancel_delayed_stuff(usbhid);
1081
1082         hid->claimed = 0;
1083
1084         usb_free_urb(usbhid->urbin);
1085         usb_free_urb(usbhid->urbctrl);
1086         usb_free_urb(usbhid->urbout);
1087         usbhid->urbin = NULL; /* don't mess up next start */
1088         usbhid->urbctrl = NULL;
1089         usbhid->urbout = NULL;
1090
1091         hid_free_buffers(hid_to_usb_dev(hid), hid);
1092 }
1093
1094 static int usbhid_power(struct hid_device *hid, int lvl)
1095 {
1096         int r = 0;
1097
1098         switch (lvl) {
1099         case PM_HINT_FULLON:
1100                 r = usbhid_get_power(hid);
1101                 break;
1102         case PM_HINT_NORMAL:
1103                 usbhid_put_power(hid);
1104                 break;
1105         }
1106         return r;
1107 }
1108
1109 static struct hid_ll_driver usb_hid_driver = {
1110         .parse = usbhid_parse,
1111         .start = usbhid_start,
1112         .stop = usbhid_stop,
1113         .open = usbhid_open,
1114         .close = usbhid_close,
1115         .power = usbhid_power,
1116         .hidinput_input_event = usb_hidinput_input_event,
1117 };
1118
1119 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1120 {
1121         struct usb_host_interface *interface = intf->cur_altsetting;
1122         struct usb_device *dev = interface_to_usbdev(intf);
1123         struct usbhid_device *usbhid;
1124         struct hid_device *hid;
1125         unsigned int n, has_in = 0;
1126         size_t len;
1127         int ret;
1128
1129         dbg_hid("HID probe called for ifnum %d\n",
1130                         intf->altsetting->desc.bInterfaceNumber);
1131
1132         for (n = 0; n < interface->desc.bNumEndpoints; n++)
1133                 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1134                         has_in++;
1135         if (!has_in) {
1136                 dev_err(&intf->dev, "couldn't find an input interrupt "
1137                                 "endpoint\n");
1138                 return -ENODEV;
1139         }
1140
1141         hid = hid_allocate_device();
1142         if (IS_ERR(hid))
1143                 return PTR_ERR(hid);
1144
1145         usb_set_intfdata(intf, hid);
1146         hid->ll_driver = &usb_hid_driver;
1147         hid->hid_output_raw_report = usbhid_output_raw_report;
1148         hid->ff_init = hid_pidff_init;
1149 #ifdef CONFIG_USB_HIDDEV
1150         hid->hiddev_connect = hiddev_connect;
1151         hid->hiddev_disconnect = hiddev_disconnect;
1152         hid->hiddev_hid_event = hiddev_hid_event;
1153         hid->hiddev_report_event = hiddev_report_event;
1154 #endif
1155         hid->dev.parent = &intf->dev;
1156         hid->bus = BUS_USB;
1157         hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1158         hid->product = le16_to_cpu(dev->descriptor.idProduct);
1159         hid->name[0] = 0;
1160         hid->quirks = usbhid_lookup_quirk(hid->vendor, hid->product);
1161         if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1162                         USB_INTERFACE_PROTOCOL_MOUSE)
1163                 hid->type = HID_TYPE_USBMOUSE;
1164
1165         if (dev->manufacturer)
1166                 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1167
1168         if (dev->product) {
1169                 if (dev->manufacturer)
1170                         strlcat(hid->name, " ", sizeof(hid->name));
1171                 strlcat(hid->name, dev->product, sizeof(hid->name));
1172         }
1173
1174         if (!strlen(hid->name))
1175                 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1176                          le16_to_cpu(dev->descriptor.idVendor),
1177                          le16_to_cpu(dev->descriptor.idProduct));
1178
1179         usb_make_path(dev, hid->phys, sizeof(hid->phys));
1180         strlcat(hid->phys, "/input", sizeof(hid->phys));
1181         len = strlen(hid->phys);
1182         if (len < sizeof(hid->phys) - 1)
1183                 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1184                          "%d", intf->altsetting[0].desc.bInterfaceNumber);
1185
1186         if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1187                 hid->uniq[0] = 0;
1188
1189         usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1190         if (usbhid == NULL) {
1191                 ret = -ENOMEM;
1192                 goto err;
1193         }
1194
1195         hid->driver_data = usbhid;
1196         usbhid->hid = hid;
1197         usbhid->intf = intf;
1198         usbhid->ifnum = interface->desc.bInterfaceNumber;
1199
1200         init_waitqueue_head(&usbhid->wait);
1201         INIT_WORK(&usbhid->reset_work, hid_reset);
1202         INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
1203         setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
1204         spin_lock_init(&usbhid->lock);
1205
1206         ret = hid_add_device(hid);
1207         if (ret) {
1208                 if (ret != -ENODEV)
1209                         dev_err(&intf->dev, "can't add hid device: %d\n", ret);
1210                 goto err_free;
1211         }
1212
1213         return 0;
1214 err_free:
1215         kfree(usbhid);
1216 err:
1217         hid_destroy_device(hid);
1218         return ret;
1219 }
1220
1221 static void usbhid_disconnect(struct usb_interface *intf)
1222 {
1223         struct hid_device *hid = usb_get_intfdata(intf);
1224         struct usbhid_device *usbhid;
1225
1226         if (WARN_ON(!hid))
1227                 return;
1228
1229         usbhid = hid->driver_data;
1230         hid_destroy_device(hid);
1231         kfree(usbhid);
1232 }
1233
1234 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1235 {
1236         del_timer_sync(&usbhid->io_retry);
1237         cancel_work_sync(&usbhid->restart_work);
1238         cancel_work_sync(&usbhid->reset_work);
1239 }
1240
1241 static void hid_cease_io(struct usbhid_device *usbhid)
1242 {
1243         del_timer(&usbhid->io_retry);
1244         usb_kill_urb(usbhid->urbin);
1245         usb_kill_urb(usbhid->urbctrl);
1246         usb_kill_urb(usbhid->urbout);
1247 }
1248
1249 /* Treat USB reset pretty much the same as suspend/resume */
1250 static int hid_pre_reset(struct usb_interface *intf)
1251 {
1252         struct hid_device *hid = usb_get_intfdata(intf);
1253         struct usbhid_device *usbhid = hid->driver_data;
1254
1255         spin_lock_irq(&usbhid->lock);
1256         set_bit(HID_RESET_PENDING, &usbhid->iofl);
1257         spin_unlock_irq(&usbhid->lock);
1258         cancel_work_sync(&usbhid->restart_work);
1259         hid_cease_io(usbhid);
1260
1261         return 0;
1262 }
1263
1264 /* Same routine used for post_reset and reset_resume */
1265 static int hid_post_reset(struct usb_interface *intf)
1266 {
1267         struct usb_device *dev = interface_to_usbdev (intf);
1268         struct hid_device *hid = usb_get_intfdata(intf);
1269         struct usbhid_device *usbhid = hid->driver_data;
1270         int status;
1271
1272         spin_lock_irq(&usbhid->lock);
1273         clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1274         spin_unlock_irq(&usbhid->lock);
1275         hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1276         status = hid_start_in(hid);
1277         if (status < 0)
1278                 hid_io_error(hid);
1279         usbhid_restart_queues(usbhid);
1280
1281         return 0;
1282 }
1283
1284 int usbhid_get_power(struct hid_device *hid)
1285 {
1286         struct usbhid_device *usbhid = hid->driver_data;
1287
1288         return usb_autopm_get_interface(usbhid->intf);
1289 }
1290
1291 void usbhid_put_power(struct hid_device *hid)
1292 {
1293         struct usbhid_device *usbhid = hid->driver_data;
1294
1295         usb_autopm_put_interface(usbhid->intf);
1296 }
1297
1298
1299 #ifdef CONFIG_PM
1300 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1301 {
1302         struct hid_device *hid = usb_get_intfdata(intf);
1303         struct usbhid_device *usbhid = hid->driver_data;
1304         int status;
1305
1306         if (message.event & PM_EVENT_AUTO) {
1307                 spin_lock_irq(&usbhid->lock);   /* Sync with error handler */
1308                 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1309                     && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1310                     && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1311                     && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1312                     && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1313                     && (!usbhid->ledcount || ignoreled))
1314                 {
1315                         set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1316                         spin_unlock_irq(&usbhid->lock);
1317                         if (hid->driver && hid->driver->suspend) {
1318                                 status = hid->driver->suspend(hid, message);
1319                                 if (status < 0)
1320                                         return status;
1321                         }
1322                 } else {
1323                         usbhid_mark_busy(usbhid);
1324                         spin_unlock_irq(&usbhid->lock);
1325                         return -EBUSY;
1326                 }
1327
1328         } else {
1329                 if (hid->driver && hid->driver->suspend) {
1330                         status = hid->driver->suspend(hid, message);
1331                         if (status < 0)
1332                                 return status;
1333                 }
1334                 spin_lock_irq(&usbhid->lock);
1335                 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1336                 spin_unlock_irq(&usbhid->lock);
1337                 if (usbhid_wait_io(hid) < 0)
1338                         return -EIO;
1339         }
1340
1341         if (!ignoreled && (message.event & PM_EVENT_AUTO)) {
1342                 spin_lock_irq(&usbhid->lock);
1343                 if (test_bit(HID_LED_ON, &usbhid->iofl)) {
1344                         spin_unlock_irq(&usbhid->lock);
1345                         usbhid_mark_busy(usbhid);
1346                         return -EBUSY;
1347                 }
1348                 spin_unlock_irq(&usbhid->lock);
1349         }
1350
1351         hid_cancel_delayed_stuff(usbhid);
1352         hid_cease_io(usbhid);
1353
1354         if ((message.event & PM_EVENT_AUTO) &&
1355                         test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1356                 /* lost race against keypresses */
1357                 status = hid_start_in(hid);
1358                 if (status < 0)
1359                         hid_io_error(hid);
1360                 usbhid_mark_busy(usbhid);
1361                 return -EBUSY;
1362         }
1363         dev_dbg(&intf->dev, "suspend\n");
1364         return 0;
1365 }
1366
1367 static int hid_resume(struct usb_interface *intf)
1368 {
1369         struct hid_device *hid = usb_get_intfdata (intf);
1370         struct usbhid_device *usbhid = hid->driver_data;
1371         int status;
1372
1373         if (!test_bit(HID_STARTED, &usbhid->iofl))
1374                 return 0;
1375
1376         clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1377         usbhid_mark_busy(usbhid);
1378
1379         if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1380             test_bit(HID_RESET_PENDING, &usbhid->iofl))
1381                 schedule_work(&usbhid->reset_work);
1382         usbhid->retry_delay = 0;
1383         status = hid_start_in(hid);
1384         if (status < 0)
1385                 hid_io_error(hid);
1386         usbhid_restart_queues(usbhid);
1387
1388         if (status >= 0 && hid->driver && hid->driver->resume) {
1389                 int ret = hid->driver->resume(hid);
1390                 if (ret < 0)
1391                         status = ret;
1392         }
1393         dev_dbg(&intf->dev, "resume status %d\n", status);
1394         return 0;
1395 }
1396
1397 static int hid_reset_resume(struct usb_interface *intf)
1398 {
1399         struct hid_device *hid = usb_get_intfdata(intf);
1400         struct usbhid_device *usbhid = hid->driver_data;
1401         int status;
1402
1403         clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1404         status = hid_post_reset(intf);
1405         if (status >= 0 && hid->driver && hid->driver->reset_resume) {
1406                 int ret = hid->driver->reset_resume(hid);
1407                 if (ret < 0)
1408                         status = ret;
1409         }
1410         return status;
1411 }
1412
1413 #endif /* CONFIG_PM */
1414
1415 static const struct usb_device_id hid_usb_ids[] = {
1416         { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1417                 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1418         { }                                             /* Terminating entry */
1419 };
1420
1421 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1422
1423 static struct usb_driver hid_driver = {
1424         .name =         "usbhid",
1425         .probe =        usbhid_probe,
1426         .disconnect =   usbhid_disconnect,
1427 #ifdef CONFIG_PM
1428         .suspend =      hid_suspend,
1429         .resume =       hid_resume,
1430         .reset_resume = hid_reset_resume,
1431 #endif
1432         .pre_reset =    hid_pre_reset,
1433         .post_reset =   hid_post_reset,
1434         .id_table =     hid_usb_ids,
1435         .supports_autosuspend = 1,
1436 };
1437
1438 static const struct hid_device_id hid_usb_table[] = {
1439         { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1440         { }
1441 };
1442
1443 static struct hid_driver hid_usb_driver = {
1444         .name = "generic-usb",
1445         .id_table = hid_usb_table,
1446 };
1447
1448 static int __init hid_init(void)
1449 {
1450         int retval = -ENOMEM;
1451
1452         resumption_waker = create_freezeable_workqueue("usbhid_resumer");
1453         if (!resumption_waker)
1454                 goto no_queue;
1455         retval = hid_register_driver(&hid_usb_driver);
1456         if (retval)
1457                 goto hid_register_fail;
1458         retval = usbhid_quirks_init(quirks_param);
1459         if (retval)
1460                 goto usbhid_quirks_init_fail;
1461         retval = hiddev_init();
1462         if (retval)
1463                 goto hiddev_init_fail;
1464         retval = usb_register(&hid_driver);
1465         if (retval)
1466                 goto usb_register_fail;
1467         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1468
1469         return 0;
1470 usb_register_fail:
1471         hiddev_exit();
1472 hiddev_init_fail:
1473         usbhid_quirks_exit();
1474 usbhid_quirks_init_fail:
1475         hid_unregister_driver(&hid_usb_driver);
1476 hid_register_fail:
1477         destroy_workqueue(resumption_waker);
1478 no_queue:
1479         return retval;
1480 }
1481
1482 static void __exit hid_exit(void)
1483 {
1484         usb_deregister(&hid_driver);
1485         hiddev_exit();
1486         usbhid_quirks_exit();
1487         hid_unregister_driver(&hid_usb_driver);
1488         destroy_workqueue(resumption_waker);
1489 }
1490
1491 module_init(hid_init);
1492 module_exit(hid_exit);
1493
1494 MODULE_AUTHOR("Andreas Gal");
1495 MODULE_AUTHOR("Vojtech Pavlik");
1496 MODULE_AUTHOR("Jiri Kosina");
1497 MODULE_DESCRIPTION(DRIVER_DESC);
1498 MODULE_LICENSE(DRIVER_LICENSE);