HID: fix USB HID devices after STD with autosuspend
[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) 2006-2008 Jiri Kosina
8  *  Copyright (c) 2007-2008 Oliver Neukum
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/smp_lock.h>
26 #include <linux/spinlock.h>
27 #include <asm/unaligned.h>
28 #include <asm/byteorder.h>
29 #include <linux/input.h>
30 #include <linux/wait.h>
31 #include <linux/workqueue.h>
32
33 #include <linux/usb.h>
34
35 #include <linux/hid.h>
36 #include <linux/hiddev.h>
37 #include <linux/hid-debug.h>
38 #include <linux/hidraw.h>
39 #include "usbhid.h"
40
41 /*
42  * Version Information
43  */
44
45 #define DRIVER_VERSION "v2.6"
46 #define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik, Jiri Kosina"
47 #define DRIVER_DESC "USB HID core driver"
48 #define DRIVER_LICENSE "GPL"
49
50 /*
51  * Module parameters.
52  */
53
54 static unsigned int hid_mousepoll_interval;
55 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
56 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
57
58 static unsigned int ignoreled;
59 module_param_named(ignoreled, ignoreled, uint, 0644);
60 MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds");
61
62 /* Quirks specified at module load time */
63 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
64 module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
65 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
66                 " quirks=vendorID:productID:quirks"
67                 " where vendorID, productID, and quirks are all in"
68                 " 0x-prefixed hex");
69 /*
70  * Input submission and I/O error handler.
71  */
72 static DEFINE_MUTEX(hid_open_mut);
73 static struct workqueue_struct *resumption_waker;
74
75 static void hid_io_error(struct hid_device *hid);
76 static int hid_submit_out(struct hid_device *hid);
77 static int hid_submit_ctrl(struct hid_device *hid);
78 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid);
79
80 /* Start up the input URB */
81 static int hid_start_in(struct hid_device *hid)
82 {
83         unsigned long flags;
84         int rc = 0;
85         struct usbhid_device *usbhid = hid->driver_data;
86
87         spin_lock_irqsave(&usbhid->lock, flags);
88         if (hid->open > 0 &&
89                         !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
90                         !test_bit(HID_REPORTED_IDLE, &usbhid->iofl) &&
91                         !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
92                 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
93                 if (rc != 0)
94                         clear_bit(HID_IN_RUNNING, &usbhid->iofl);
95         }
96         spin_unlock_irqrestore(&usbhid->lock, flags);
97         return rc;
98 }
99
100 /* I/O retry timer routine */
101 static void hid_retry_timeout(unsigned long _hid)
102 {
103         struct hid_device *hid = (struct hid_device *) _hid;
104         struct usbhid_device *usbhid = hid->driver_data;
105
106         dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
107         if (hid_start_in(hid))
108                 hid_io_error(hid);
109 }
110
111 /* Workqueue routine to reset the device or clear a halt */
112 static void hid_reset(struct work_struct *work)
113 {
114         struct usbhid_device *usbhid =
115                 container_of(work, struct usbhid_device, reset_work);
116         struct hid_device *hid = usbhid->hid;
117         int rc = 0;
118
119         if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
120                 dev_dbg(&usbhid->intf->dev, "clear halt\n");
121                 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
122                 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
123                 hid_start_in(hid);
124         }
125
126         else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
127                 dev_dbg(&usbhid->intf->dev, "resetting device\n");
128                 rc = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
129                 if (rc == 0) {
130                         rc = usb_reset_device(hid_to_usb_dev(hid));
131                         usb_unlock_device(hid_to_usb_dev(hid));
132                 }
133                 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
134         }
135
136         switch (rc) {
137         case 0:
138                 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
139                         hid_io_error(hid);
140                 break;
141         default:
142                 err_hid("can't reset device, %s-%s/input%d, status %d",
143                                 hid_to_usb_dev(hid)->bus->bus_name,
144                                 hid_to_usb_dev(hid)->devpath,
145                                 usbhid->ifnum, rc);
146                 /* FALLTHROUGH */
147         case -EHOSTUNREACH:
148         case -ENODEV:
149         case -EINTR:
150                 break;
151         }
152 }
153
154 /* Main I/O error handler */
155 static void hid_io_error(struct hid_device *hid)
156 {
157         unsigned long flags;
158         struct usbhid_device *usbhid = hid->driver_data;
159
160         spin_lock_irqsave(&usbhid->lock, flags);
161
162         /* Stop when disconnected */
163         if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
164                 goto done;
165
166         /* If it has been a while since the last error, we'll assume
167          * this a brand new error and reset the retry timeout. */
168         if (time_after(jiffies, usbhid->stop_retry + HZ/2))
169                 usbhid->retry_delay = 0;
170
171         /* When an error occurs, retry at increasing intervals */
172         if (usbhid->retry_delay == 0) {
173                 usbhid->retry_delay = 13;       /* Then 26, 52, 104, 104, ... */
174                 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
175         } else if (usbhid->retry_delay < 100)
176                 usbhid->retry_delay *= 2;
177
178         if (time_after(jiffies, usbhid->stop_retry)) {
179
180                 /* Retries failed, so do a port reset */
181                 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
182                         schedule_work(&usbhid->reset_work);
183                         goto done;
184                 }
185         }
186
187         mod_timer(&usbhid->io_retry,
188                         jiffies + msecs_to_jiffies(usbhid->retry_delay));
189 done:
190         spin_unlock_irqrestore(&usbhid->lock, flags);
191 }
192
193 static void usbhid_mark_busy(struct usbhid_device *usbhid)
194 {
195         struct usb_interface *intf = usbhid->intf;
196
197         usb_mark_last_busy(interface_to_usbdev(intf));
198 }
199
200 static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
201 {
202         struct hid_device *hid = usb_get_intfdata(usbhid->intf);
203         int kicked;
204
205         if (!hid)
206                 return 0;
207
208         if ((kicked = (usbhid->outhead != usbhid->outtail))) {
209                 dbg("Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
210                 if (hid_submit_out(hid)) {
211                         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
212                         wake_up(&usbhid->wait);
213                 }
214         }
215         return kicked;
216 }
217
218 static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
219 {
220         struct hid_device *hid = usb_get_intfdata(usbhid->intf);
221         int kicked;
222
223         WARN_ON(hid == NULL);
224         if (!hid)
225                 return 0;
226
227         if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
228                 dbg("Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
229                 if (hid_submit_ctrl(hid)) {
230                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
231                         wake_up(&usbhid->wait);
232                 }
233         }
234         return kicked;
235 }
236
237 /*
238  * Input interrupt completion handler.
239  */
240
241 static void hid_irq_in(struct urb *urb)
242 {
243         struct hid_device       *hid = urb->context;
244         struct usbhid_device    *usbhid = hid->driver_data;
245         int                     status;
246
247         switch (urb->status) {
248         case 0:                 /* success */
249                 usbhid_mark_busy(usbhid);
250                 usbhid->retry_delay = 0;
251                 hid_input_report(urb->context, HID_INPUT_REPORT,
252                                  urb->transfer_buffer,
253                                  urb->actual_length, 1);
254                 /*
255                  * autosuspend refused while keys are pressed
256                  * because most keyboards don't wake up when
257                  * a key is released
258                  */
259                 if (hid_check_keys_pressed(hid))
260                         set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
261                 else
262                         clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
263                 break;
264         case -EPIPE:            /* stall */
265                 usbhid_mark_busy(usbhid);
266                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
267                 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
268                 schedule_work(&usbhid->reset_work);
269                 return;
270         case -ECONNRESET:       /* unlink */
271         case -ENOENT:
272         case -ESHUTDOWN:        /* unplug */
273                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
274                 return;
275         case -EILSEQ:           /* protocol error or unplug */
276         case -EPROTO:           /* protocol error or unplug */
277         case -ETIME:            /* protocol error or unplug */
278         case -ETIMEDOUT:        /* Should never happen, but... */
279                 usbhid_mark_busy(usbhid);
280                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
281                 hid_io_error(hid);
282                 return;
283         default:                /* error */
284                 dev_warn(&urb->dev->dev, "input irq status %d  "
285                                 "received\n", urb->status);
286         }
287
288         status = usb_submit_urb(urb, GFP_ATOMIC);
289         if (status) {
290                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
291                 if (status != -EPERM) {
292                         err_hid("can't resubmit intr, %s-%s/input%d, status %d",
293                                         hid_to_usb_dev(hid)->bus->bus_name,
294                                         hid_to_usb_dev(hid)->devpath,
295                                         usbhid->ifnum, status);
296                         hid_io_error(hid);
297                 }
298         }
299 }
300
301 static int hid_submit_out(struct hid_device *hid)
302 {
303         struct hid_report *report;
304         char *raw_report;
305         struct usbhid_device *usbhid = hid->driver_data;
306
307         report = usbhid->out[usbhid->outtail].report;
308         raw_report = usbhid->out[usbhid->outtail].raw_report;
309
310         if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
311                 usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
312                 usbhid->urbout->dev = hid_to_usb_dev(hid);
313                 memcpy(usbhid->outbuf, raw_report, usbhid->urbout->transfer_buffer_length);
314                 kfree(raw_report);
315
316                 dbg_hid("submitting out urb\n");
317
318                 if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
319                         err_hid("usb_submit_urb(out) failed");
320                         return -1;
321                 }
322         } else {
323                 /*
324                  * queue work to wake up the device.
325                  * as the work queue is freezeable, this is safe
326                  * with respect to STD and STR
327                  */
328                 queue_work(resumption_waker, &usbhid->restart_work);
329         }
330
331         return 0;
332 }
333
334 static int hid_submit_ctrl(struct hid_device *hid)
335 {
336         struct hid_report *report;
337         unsigned char dir;
338         char *raw_report;
339         int len;
340         struct usbhid_device *usbhid = hid->driver_data;
341
342         report = usbhid->ctrl[usbhid->ctrltail].report;
343         raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
344         dir = usbhid->ctrl[usbhid->ctrltail].dir;
345
346         if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
347                 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
348                 if (dir == USB_DIR_OUT) {
349                         usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
350                         usbhid->urbctrl->transfer_buffer_length = len;
351                         memcpy(usbhid->ctrlbuf, raw_report, len);
352                         kfree(raw_report);
353                 } else {
354                         int maxpacket, padlen;
355
356                         usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
357                         maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
358                         if (maxpacket > 0) {
359                                 padlen = DIV_ROUND_UP(len, maxpacket);
360                                 padlen *= maxpacket;
361                                 if (padlen > usbhid->bufsize)
362                                         padlen = usbhid->bufsize;
363                         } else
364                                 padlen = 0;
365                         usbhid->urbctrl->transfer_buffer_length = padlen;
366                 }
367                 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
368
369                 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
370                 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
371                 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
372                 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
373                 usbhid->cr->wLength = cpu_to_le16(len);
374
375                 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
376                         usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
377                         usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
378
379                 if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
380                         err_hid("usb_submit_urb(ctrl) failed");
381                         return -1;
382                 }
383         } else {
384                 /*
385                  * queue work to wake up the device.
386                  * as the work queue is freezeable, this is safe
387                  * with respect to STD and STR
388                  */
389                 queue_work(resumption_waker, &usbhid->restart_work);
390         }
391
392         return 0;
393 }
394
395 /*
396  * Output interrupt completion handler.
397  */
398
399 static void hid_irq_out(struct urb *urb)
400 {
401         struct hid_device *hid = urb->context;
402         struct usbhid_device *usbhid = hid->driver_data;
403         unsigned long flags;
404         int unplug = 0;
405
406         switch (urb->status) {
407         case 0:                 /* success */
408                 break;
409         case -ESHUTDOWN:        /* unplug */
410                 unplug = 1;
411         case -EILSEQ:           /* protocol error or unplug */
412         case -EPROTO:           /* protocol error or unplug */
413         case -ECONNRESET:       /* unlink */
414         case -ENOENT:
415                 break;
416         default:                /* error */
417                 dev_warn(&urb->dev->dev, "output irq status %d "
418                                 "received\n", urb->status);
419         }
420
421         spin_lock_irqsave(&usbhid->lock, flags);
422
423         if (unplug)
424                 usbhid->outtail = usbhid->outhead;
425         else
426                 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
427
428         if (usbhid->outhead != usbhid->outtail) {
429                 if (hid_submit_out(hid)) {
430                         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
431                         wake_up(&usbhid->wait);
432                 }
433                 spin_unlock_irqrestore(&usbhid->lock, flags);
434                 return;
435         }
436
437         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
438         spin_unlock_irqrestore(&usbhid->lock, flags);
439         wake_up(&usbhid->wait);
440 }
441
442 /*
443  * Control pipe completion handler.
444  */
445
446 static void hid_ctrl(struct urb *urb)
447 {
448         struct hid_device *hid = urb->context;
449         struct usbhid_device *usbhid = hid->driver_data;
450         int unplug = 0, status = urb->status;
451
452         spin_lock(&usbhid->lock);
453
454         switch (status) {
455         case 0:                 /* success */
456                 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
457                         hid_input_report(urb->context,
458                                 usbhid->ctrl[usbhid->ctrltail].report->type,
459                                 urb->transfer_buffer, urb->actual_length, 0);
460                 break;
461         case -ESHUTDOWN:        /* unplug */
462                 unplug = 1;
463         case -EILSEQ:           /* protocol error or unplug */
464         case -EPROTO:           /* protocol error or unplug */
465         case -ECONNRESET:       /* unlink */
466         case -ENOENT:
467         case -EPIPE:            /* report not available */
468                 break;
469         default:                /* error */
470                 dev_warn(&urb->dev->dev, "ctrl urb status %d "
471                                 "received\n", status);
472         }
473
474         if (unplug)
475                 usbhid->ctrltail = usbhid->ctrlhead;
476         else
477                 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
478
479         if (usbhid->ctrlhead != usbhid->ctrltail) {
480                 if (hid_submit_ctrl(hid)) {
481                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
482                         wake_up(&usbhid->wait);
483                 }
484                 spin_unlock(&usbhid->lock);
485                 return;
486         }
487
488         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
489         spin_unlock(&usbhid->lock);
490         wake_up(&usbhid->wait);
491 }
492
493 void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report, 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                 return;
521         }
522
523         if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
524                 dev_warn(&hid->dev, "control queue full\n");
525                 return;
526         }
527
528         if (dir == USB_DIR_OUT) {
529                 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC);
530                 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
531                         dev_warn(&hid->dev, "control queueing failed\n");
532                         return;
533                 }
534                 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
535         }
536         usbhid->ctrl[usbhid->ctrlhead].report = report;
537         usbhid->ctrl[usbhid->ctrlhead].dir = dir;
538         usbhid->ctrlhead = head;
539
540         if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
541                 if (hid_submit_ctrl(hid))
542                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
543 }
544
545 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
546 {
547         struct usbhid_device *usbhid = hid->driver_data;
548         unsigned long flags;
549
550         spin_lock_irqsave(&usbhid->lock, flags);
551         __usbhid_submit_report(hid, report, dir);
552         spin_unlock_irqrestore(&usbhid->lock, flags);
553 }
554 EXPORT_SYMBOL_GPL(usbhid_submit_report);
555
556 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
557 {
558         struct hid_device *hid = input_get_drvdata(dev);
559         struct usbhid_device *usbhid = hid->driver_data;
560         struct hid_field *field;
561         unsigned long flags;
562         int offset;
563
564         if (type == EV_FF)
565                 return input_ff_event(dev, type, code, value);
566
567         if (type != EV_LED)
568                 return -1;
569
570         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
571                 dev_warn(&dev->dev, "event field not found\n");
572                 return -1;
573         }
574
575         hid_set_field(field, offset, value);
576         if (value) {
577                 spin_lock_irqsave(&usbhid->lock, flags);
578                 usbhid->ledcount++;
579                 spin_unlock_irqrestore(&usbhid->lock, flags);
580         } else {
581                 spin_lock_irqsave(&usbhid->lock, flags);
582                 usbhid->ledcount--;
583                 spin_unlock_irqrestore(&usbhid->lock, flags);
584         }
585         usbhid_submit_report(hid, field->report, USB_DIR_OUT);
586
587         return 0;
588 }
589
590 int usbhid_wait_io(struct hid_device *hid)
591 {
592         struct usbhid_device *usbhid = hid->driver_data;
593
594         if (!wait_event_timeout(usbhid->wait,
595                                 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
596                                 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
597                                         10*HZ)) {
598                 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
599                 return -1;
600         }
601
602         return 0;
603 }
604
605 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
606 {
607         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
608                 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
609                 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
610 }
611
612 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
613                 unsigned char type, void *buf, int size)
614 {
615         int result, retries = 4;
616
617         memset(buf, 0, size);
618
619         do {
620                 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
621                                 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
622                                 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
623                 retries--;
624         } while (result < size && retries);
625         return result;
626 }
627
628 int usbhid_open(struct hid_device *hid)
629 {
630         struct usbhid_device *usbhid = hid->driver_data;
631         int res;
632
633         mutex_lock(&hid_open_mut);
634         if (!hid->open++) {
635                 res = usb_autopm_get_interface(usbhid->intf);
636                 /* the device must be awake to reliable request remote wakeup */
637                 if (res < 0) {
638                         hid->open--;
639                         mutex_unlock(&hid_open_mut);
640                         return -EIO;
641                 }
642                 usbhid->intf->needs_remote_wakeup = 1;
643                 if (hid_start_in(hid))
644                         hid_io_error(hid);
645  
646                 usb_autopm_put_interface(usbhid->intf);
647         }
648         mutex_unlock(&hid_open_mut);
649         return 0;
650 }
651
652 void usbhid_close(struct hid_device *hid)
653 {
654         struct usbhid_device *usbhid = hid->driver_data;
655
656         mutex_lock(&hid_open_mut);
657
658         /* protecting hid->open to make sure we don't restart
659          * data acquistion due to a resumption we no longer
660          * care about
661          */
662         spin_lock_irq(&usbhid->lock);
663         if (!--hid->open) {
664                 spin_unlock_irq(&usbhid->lock);
665                 usb_kill_urb(usbhid->urbin);
666                 flush_scheduled_work();
667                 usbhid->intf->needs_remote_wakeup = 0;
668         } else {
669                 spin_unlock_irq(&usbhid->lock);
670         }
671         mutex_unlock(&hid_open_mut);
672 }
673
674 /*
675  * Initialize all reports
676  */
677
678 void usbhid_init_reports(struct hid_device *hid)
679 {
680         struct hid_report *report;
681         struct usbhid_device *usbhid = hid->driver_data;
682         int err, ret;
683
684         list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
685                 usbhid_submit_report(hid, report, USB_DIR_IN);
686
687         list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
688                 usbhid_submit_report(hid, report, USB_DIR_IN);
689
690         err = 0;
691         ret = usbhid_wait_io(hid);
692         while (ret) {
693                 err |= ret;
694                 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
695                         usb_kill_urb(usbhid->urbctrl);
696                 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
697                         usb_kill_urb(usbhid->urbout);
698                 ret = usbhid_wait_io(hid);
699         }
700
701         if (err)
702                 dev_warn(&hid->dev, "timeout initializing reports\n");
703 }
704
705 /*
706  * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
707  */
708 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
709     unsigned int hid_code, struct hid_field **pfield)
710 {
711         struct hid_report *report;
712         struct hid_field *field;
713         struct hid_usage *usage;
714         int i, j;
715
716         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
717                 for (i = 0; i < report->maxfield; i++) {
718                         field = report->field[i];
719                         for (j = 0; j < field->maxusage; j++) {
720                                 usage = &field->usage[j];
721                                 if ((usage->hid & HID_USAGE_PAGE) == page &&
722                                     (usage->hid & 0xFFFF) == hid_code) {
723                                         *pfield = field;
724                                         return j;
725                                 }
726                         }
727                 }
728         }
729         return -1;
730 }
731
732 void usbhid_set_leds(struct hid_device *hid)
733 {
734         struct hid_field *field;
735         int offset;
736
737         if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
738                 hid_set_field(field, offset, 0);
739                 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
740         }
741 }
742 EXPORT_SYMBOL_GPL(usbhid_set_leds);
743
744 /*
745  * Traverse the supplied list of reports and find the longest
746  */
747 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
748                 unsigned int *max)
749 {
750         struct hid_report *report;
751         unsigned int size;
752
753         list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
754                 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
755                 if (*max < size)
756                         *max = size;
757         }
758 }
759
760 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
761 {
762         struct usbhid_device *usbhid = hid->driver_data;
763
764         usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
765                         &usbhid->inbuf_dma);
766         usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
767                         &usbhid->outbuf_dma);
768         usbhid->cr = usb_buffer_alloc(dev, sizeof(*usbhid->cr), GFP_KERNEL,
769                         &usbhid->cr_dma);
770         usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
771                         &usbhid->ctrlbuf_dma);
772         if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
773                         !usbhid->ctrlbuf)
774                 return -1;
775
776         return 0;
777 }
778
779 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
780 {
781         struct usbhid_device *usbhid = hid->driver_data;
782         struct usb_device *dev = hid_to_usb_dev(hid);
783         struct usb_interface *intf = usbhid->intf;
784         struct usb_host_interface *interface = intf->cur_altsetting;
785         int ret;
786
787         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
788                 HID_REQ_SET_REPORT,
789                 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
790                 ((HID_OUTPUT_REPORT + 1) << 8) | *buf,
791                 interface->desc.bInterfaceNumber, buf + 1, count - 1,
792                 USB_CTRL_SET_TIMEOUT);
793
794         /* count also the report id */
795         if (ret > 0)
796                 ret++;
797
798         return ret;
799 }
800
801 static void usbhid_restart_queues(struct usbhid_device *usbhid)
802 {
803         if (usbhid->urbout)
804                 usbhid_restart_out_queue(usbhid);
805         usbhid_restart_ctrl_queue(usbhid);
806 }
807
808 static void __usbhid_restart_queues(struct work_struct *work)
809 {
810         struct usbhid_device *usbhid =
811                 container_of(work, struct usbhid_device, restart_work);
812         int r;
813
814         r = usb_autopm_get_interface(usbhid->intf);
815         if (r < 0)
816                 return;
817         usb_autopm_put_interface(usbhid->intf);
818 }
819
820 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
821 {
822         struct usbhid_device *usbhid = hid->driver_data;
823
824         usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
825         usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
826         usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
827         usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
828 }
829
830 static int usbhid_parse(struct hid_device *hid)
831 {
832         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
833         struct usb_host_interface *interface = intf->cur_altsetting;
834         struct usb_device *dev = interface_to_usbdev (intf);
835         struct hid_descriptor *hdesc;
836         u32 quirks = 0;
837         unsigned int rsize = 0;
838         char *rdesc;
839         int ret, n;
840
841         quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
842                         le16_to_cpu(dev->descriptor.idProduct));
843
844         /* Many keyboards and mice don't like to be polled for reports,
845          * so we will always set the HID_QUIRK_NOGET flag for them. */
846         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
847                 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
848                         interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
849                                 quirks |= HID_QUIRK_NOGET;
850         }
851
852         if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
853             (!interface->desc.bNumEndpoints ||
854              usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
855                 dbg_hid("class descriptor not present\n");
856                 return -ENODEV;
857         }
858
859         hid->version = le16_to_cpu(hdesc->bcdHID);
860         hid->country = hdesc->bCountryCode;
861
862         for (n = 0; n < hdesc->bNumDescriptors; n++)
863                 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
864                         rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
865
866         if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
867                 dbg_hid("weird size of report descriptor (%u)\n", rsize);
868                 return -EINVAL;
869         }
870
871         if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
872                 dbg_hid("couldn't allocate rdesc memory\n");
873                 return -ENOMEM;
874         }
875
876         hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
877
878         ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
879                         HID_DT_REPORT, rdesc, rsize);
880         if (ret < 0) {
881                 dbg_hid("reading report descriptor failed\n");
882                 kfree(rdesc);
883                 goto err;
884         }
885
886         dbg_hid("report descriptor (size %u, read %d) = ", rsize, n);
887         for (n = 0; n < rsize; n++)
888                 dbg_hid_line(" %02x", (unsigned char) rdesc[n]);
889         dbg_hid_line("\n");
890
891         ret = hid_parse_report(hid, rdesc, rsize);
892         kfree(rdesc);
893         if (ret) {
894                 dbg_hid("parsing report descriptor failed\n");
895                 goto err;
896         }
897
898         hid->quirks = quirks;
899
900         return 0;
901 err:
902         return ret;
903 }
904
905 static int usbhid_start(struct hid_device *hid)
906 {
907         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
908         struct usb_host_interface *interface = intf->cur_altsetting;
909         struct usb_device *dev = interface_to_usbdev(intf);
910         struct usbhid_device *usbhid = hid->driver_data;
911         unsigned int n, insize = 0;
912         int ret;
913
914         clear_bit(HID_DISCONNECTED, &usbhid->iofl);
915
916         usbhid->bufsize = HID_MIN_BUFFER_SIZE;
917         hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
918         hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
919         hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
920
921         if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
922                 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
923
924         hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
925
926         if (insize > HID_MAX_BUFFER_SIZE)
927                 insize = HID_MAX_BUFFER_SIZE;
928
929         if (hid_alloc_buffers(dev, hid)) {
930                 ret = -ENOMEM;
931                 goto fail;
932         }
933
934         for (n = 0; n < interface->desc.bNumEndpoints; n++) {
935                 struct usb_endpoint_descriptor *endpoint;
936                 int pipe;
937                 int interval;
938
939                 endpoint = &interface->endpoint[n].desc;
940                 if (!usb_endpoint_xfer_int(endpoint))
941                         continue;
942
943                 interval = endpoint->bInterval;
944
945                 /* Some vendors give fullspeed interval on highspeed devides */
946                 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
947                     dev->speed == USB_SPEED_HIGH) {
948                         interval = fls(endpoint->bInterval*8);
949                         printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
950                                hid->name, endpoint->bInterval, interval);
951                 }
952
953                 /* Change the polling interval of mice. */
954                 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
955                         interval = hid_mousepoll_interval;
956
957                 ret = -ENOMEM;
958                 if (usb_endpoint_dir_in(endpoint)) {
959                         if (usbhid->urbin)
960                                 continue;
961                         if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
962                                 goto fail;
963                         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
964                         usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
965                                          hid_irq_in, hid, interval);
966                         usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
967                         usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
968                 } else {
969                         if (usbhid->urbout)
970                                 continue;
971                         if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
972                                 goto fail;
973                         pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
974                         usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
975                                          hid_irq_out, hid, interval);
976                         usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
977                         usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
978                 }
979         }
980
981         init_waitqueue_head(&usbhid->wait);
982         INIT_WORK(&usbhid->reset_work, hid_reset);
983         INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
984         setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
985
986         spin_lock_init(&usbhid->lock);
987         spin_lock_init(&usbhid->lock);
988
989         usbhid->intf = intf;
990         usbhid->ifnum = interface->desc.bInterfaceNumber;
991
992         usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
993         if (!usbhid->urbctrl) {
994                 ret = -ENOMEM;
995                 goto fail;
996         }
997
998         usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
999                              usbhid->ctrlbuf, 1, hid_ctrl, hid);
1000         usbhid->urbctrl->setup_dma = usbhid->cr_dma;
1001         usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
1002         usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
1003
1004         usbhid_init_reports(hid);
1005         hid_dump_device(hid);
1006
1007         set_bit(HID_STARTED, &usbhid->iofl);
1008
1009         /* Some keyboards don't work until their LEDs have been set.
1010          * Since BIOSes do set the LEDs, it must be safe for any device
1011          * that supports the keyboard boot protocol.
1012          */
1013         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1014                         interface->desc.bInterfaceProtocol ==
1015                                 USB_INTERFACE_PROTOCOL_KEYBOARD)
1016                 usbhid_set_leds(hid);
1017
1018         return 0;
1019
1020 fail:
1021         usb_free_urb(usbhid->urbin);
1022         usb_free_urb(usbhid->urbout);
1023         usb_free_urb(usbhid->urbctrl);
1024         usbhid->urbin = NULL;
1025         usbhid->urbout = NULL;
1026         usbhid->urbctrl = NULL;
1027         hid_free_buffers(dev, hid);
1028         return ret;
1029 }
1030
1031 static void usbhid_stop(struct hid_device *hid)
1032 {
1033         struct usbhid_device *usbhid = hid->driver_data;
1034
1035         if (WARN_ON(!usbhid))
1036                 return;
1037
1038         clear_bit(HID_STARTED, &usbhid->iofl);
1039         spin_lock_irq(&usbhid->lock);   /* Sync with error handler */
1040         set_bit(HID_DISCONNECTED, &usbhid->iofl);
1041         spin_unlock_irq(&usbhid->lock);
1042         usb_kill_urb(usbhid->urbin);
1043         usb_kill_urb(usbhid->urbout);
1044         usb_kill_urb(usbhid->urbctrl);
1045
1046         hid_cancel_delayed_stuff(usbhid);
1047
1048         if (hid->claimed & HID_CLAIMED_INPUT)
1049                 hidinput_disconnect(hid);
1050         if (hid->claimed & HID_CLAIMED_HIDDEV)
1051                 hiddev_disconnect(hid);
1052         if (hid->claimed & HID_CLAIMED_HIDRAW)
1053                 hidraw_disconnect(hid);
1054
1055         hid->claimed = 0;
1056
1057         usb_free_urb(usbhid->urbin);
1058         usb_free_urb(usbhid->urbctrl);
1059         usb_free_urb(usbhid->urbout);
1060         usbhid->urbin = NULL; /* don't mess up next start */
1061         usbhid->urbctrl = NULL;
1062         usbhid->urbout = NULL;
1063
1064         hid_free_buffers(hid_to_usb_dev(hid), hid);
1065 }
1066
1067 static int usbhid_power(struct hid_device *hid, int lvl)
1068 {
1069         int r = 0;
1070
1071         switch (lvl) {
1072         case PM_HINT_FULLON:
1073                 r = usbhid_get_power(hid);
1074                 break;
1075         case PM_HINT_NORMAL:
1076                 usbhid_put_power(hid);
1077                 break;
1078         }
1079         return r;
1080 }
1081
1082 static struct hid_ll_driver usb_hid_driver = {
1083         .parse = usbhid_parse,
1084         .start = usbhid_start,
1085         .stop = usbhid_stop,
1086         .open = usbhid_open,
1087         .close = usbhid_close,
1088         .power = usbhid_power,
1089         .hidinput_input_event = usb_hidinput_input_event,
1090 };
1091
1092 static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1093 {
1094         struct usb_host_interface *interface = intf->cur_altsetting;
1095         struct usb_device *dev = interface_to_usbdev(intf);
1096         struct usbhid_device *usbhid;
1097         struct hid_device *hid;
1098         unsigned int n, has_in = 0;
1099         size_t len;
1100         int ret;
1101
1102         dbg_hid("HID probe called for ifnum %d\n",
1103                         intf->altsetting->desc.bInterfaceNumber);
1104
1105         for (n = 0; n < interface->desc.bNumEndpoints; n++)
1106                 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1107                         has_in++;
1108         if (!has_in) {
1109                 dev_err(&intf->dev, "couldn't find an input interrupt "
1110                                 "endpoint\n");
1111                 return -ENODEV;
1112         }
1113
1114         hid = hid_allocate_device();
1115         if (IS_ERR(hid))
1116                 return PTR_ERR(hid);
1117
1118         usb_set_intfdata(intf, hid);
1119         hid->ll_driver = &usb_hid_driver;
1120         hid->hid_output_raw_report = usbhid_output_raw_report;
1121         hid->ff_init = hid_pidff_init;
1122 #ifdef CONFIG_USB_HIDDEV
1123         hid->hiddev_connect = hiddev_connect;
1124         hid->hiddev_hid_event = hiddev_hid_event;
1125         hid->hiddev_report_event = hiddev_report_event;
1126 #endif
1127         hid->dev.parent = &intf->dev;
1128         hid->bus = BUS_USB;
1129         hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1130         hid->product = le16_to_cpu(dev->descriptor.idProduct);
1131         hid->name[0] = 0;
1132         if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1133                         USB_INTERFACE_PROTOCOL_MOUSE)
1134                 hid->type = HID_TYPE_USBMOUSE;
1135
1136         if (dev->manufacturer)
1137                 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1138
1139         if (dev->product) {
1140                 if (dev->manufacturer)
1141                         strlcat(hid->name, " ", sizeof(hid->name));
1142                 strlcat(hid->name, dev->product, sizeof(hid->name));
1143         }
1144
1145         if (!strlen(hid->name))
1146                 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1147                          le16_to_cpu(dev->descriptor.idVendor),
1148                          le16_to_cpu(dev->descriptor.idProduct));
1149
1150         usb_make_path(dev, hid->phys, sizeof(hid->phys));
1151         strlcat(hid->phys, "/input", sizeof(hid->phys));
1152         len = strlen(hid->phys);
1153         if (len < sizeof(hid->phys) - 1)
1154                 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1155                          "%d", intf->altsetting[0].desc.bInterfaceNumber);
1156
1157         if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1158                 hid->uniq[0] = 0;
1159
1160         usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1161         if (usbhid == NULL) {
1162                 ret = -ENOMEM;
1163                 goto err;
1164         }
1165
1166         hid->driver_data = usbhid;
1167         usbhid->hid = hid;
1168
1169         ret = hid_add_device(hid);
1170         if (ret) {
1171                 if (ret != -ENODEV)
1172                         dev_err(&intf->dev, "can't add hid device: %d\n", ret);
1173                 goto err_free;
1174         }
1175
1176         return 0;
1177 err_free:
1178         kfree(usbhid);
1179 err:
1180         hid_destroy_device(hid);
1181         return ret;
1182 }
1183
1184 static void hid_disconnect(struct usb_interface *intf)
1185 {
1186         struct hid_device *hid = usb_get_intfdata(intf);
1187         struct usbhid_device *usbhid;
1188
1189         if (WARN_ON(!hid))
1190                 return;
1191
1192         usbhid = hid->driver_data;
1193         hid_destroy_device(hid);
1194         kfree(usbhid);
1195 }
1196
1197 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1198 {
1199         del_timer_sync(&usbhid->io_retry);
1200         cancel_work_sync(&usbhid->restart_work);
1201         cancel_work_sync(&usbhid->reset_work);
1202 }
1203
1204 static void hid_cease_io(struct usbhid_device *usbhid)
1205 {
1206         del_timer(&usbhid->io_retry);
1207         usb_kill_urb(usbhid->urbin);
1208         usb_kill_urb(usbhid->urbctrl);
1209         usb_kill_urb(usbhid->urbout);
1210         flush_scheduled_work();
1211 }
1212
1213 #ifdef CONFIG_PM
1214 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1215 {
1216         struct hid_device *hid = usb_get_intfdata(intf);
1217         struct usbhid_device *usbhid = hid->driver_data;
1218         struct usb_device *udev = interface_to_usbdev(intf);
1219         int status;
1220
1221         if (udev->auto_pm) {
1222                 spin_lock_irq(&usbhid->lock);   /* Sync with error handler */
1223                 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1224                     && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1225                     && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1226                     && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1227                     && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1228                     && (!usbhid->ledcount || ignoreled))
1229                 {
1230                         set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1231                         spin_unlock_irq(&usbhid->lock);
1232                 } else {
1233                         usbhid_mark_busy(usbhid);
1234                         spin_unlock_irq(&usbhid->lock);
1235                         return -EBUSY;
1236                 }
1237
1238         } else {
1239                 spin_lock_irq(&usbhid->lock);
1240                 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1241                 spin_unlock_irq(&usbhid->lock);
1242                 if (usbhid_wait_io(hid) < 0)
1243                         return -EIO;
1244         }
1245
1246         if (!ignoreled && udev->auto_pm) {
1247                 spin_lock_irq(&usbhid->lock);
1248                 if (test_bit(HID_LED_ON, &usbhid->iofl)) {
1249                         spin_unlock_irq(&usbhid->lock);
1250                         usbhid_mark_busy(usbhid);
1251                         return -EBUSY;
1252                 }
1253                 spin_unlock_irq(&usbhid->lock);
1254         }
1255
1256         hid_cancel_delayed_stuff(usbhid);
1257         hid_cease_io(usbhid);
1258
1259         if (udev->auto_pm && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1260                 /* lost race against keypresses */
1261                 status = hid_start_in(hid);
1262                 if (status < 0)
1263                         hid_io_error(hid);
1264                 usbhid_mark_busy(usbhid);
1265                 return -EBUSY;
1266         }
1267         dev_dbg(&intf->dev, "suspend\n");
1268         return 0;
1269 }
1270
1271 static int hid_resume(struct usb_interface *intf)
1272 {
1273         struct hid_device *hid = usb_get_intfdata (intf);
1274         struct usbhid_device *usbhid = hid->driver_data;
1275         int status;
1276
1277         if (!test_bit(HID_STARTED, &usbhid->iofl))
1278                 return 0;
1279
1280         clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1281         usbhid_mark_busy(usbhid);
1282
1283         if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1284             test_bit(HID_RESET_PENDING, &usbhid->iofl))
1285                 schedule_work(&usbhid->reset_work);
1286         usbhid->retry_delay = 0;
1287         status = hid_start_in(hid);
1288         if (status < 0)
1289                 hid_io_error(hid);
1290         usbhid_restart_queues(usbhid);
1291
1292         dev_dbg(&intf->dev, "resume status %d\n", status);
1293         return 0;
1294 }
1295
1296 #endif /* CONFIG_PM */
1297
1298 /* Treat USB reset pretty much the same as suspend/resume */
1299 static int hid_pre_reset(struct usb_interface *intf)
1300 {
1301         struct hid_device *hid = usb_get_intfdata(intf);
1302         struct usbhid_device *usbhid = hid->driver_data;
1303
1304         spin_lock_irq(&usbhid->lock);
1305         set_bit(HID_RESET_PENDING, &usbhid->iofl);
1306         spin_unlock_irq(&usbhid->lock);
1307         hid_cease_io(usbhid);
1308
1309         return 0;
1310 }
1311
1312 /* Same routine used for post_reset and reset_resume */
1313 static int hid_post_reset(struct usb_interface *intf)
1314 {
1315         struct usb_device *dev = interface_to_usbdev (intf);
1316         struct hid_device *hid = usb_get_intfdata(intf);
1317         struct usbhid_device *usbhid = hid->driver_data;
1318         int status;
1319  
1320         spin_lock_irq(&usbhid->lock);
1321         clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1322         spin_unlock_irq(&usbhid->lock);
1323         hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1324         /* FIXME: Any more reinitialization needed? */
1325         status = hid_start_in(hid);
1326         if (status < 0)
1327                 hid_io_error(hid);
1328         usbhid_restart_queues(usbhid);
1329
1330         return 0;
1331 }
1332
1333 static int hid_reset_resume(struct usb_interface *intf)
1334 {
1335         struct hid_device *hid = usb_get_intfdata(intf);
1336         struct usbhid_device *usbhid = hid->driver_data;
1337
1338         clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1339         return hid_post_reset(intf);
1340 }
1341
1342 int usbhid_get_power(struct hid_device *hid)
1343 {
1344         struct usbhid_device *usbhid = hid->driver_data;
1345  
1346         return usb_autopm_get_interface(usbhid->intf);
1347 }
1348
1349 void usbhid_put_power(struct hid_device *hid)
1350 {
1351         struct usbhid_device *usbhid = hid->driver_data;
1352  
1353         usb_autopm_put_interface(usbhid->intf);
1354 }
1355
1356 static struct usb_device_id hid_usb_ids [] = {
1357         { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1358                 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1359         { }                                             /* Terminating entry */
1360 };
1361
1362 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1363
1364 static struct usb_driver hid_driver = {
1365         .name =         "usbhid",
1366         .probe =        hid_probe,
1367         .disconnect =   hid_disconnect,
1368 #ifdef CONFIG_PM
1369         .suspend =      hid_suspend,
1370         .resume =       hid_resume,
1371         .reset_resume = hid_reset_resume,
1372 #endif
1373         .pre_reset =    hid_pre_reset,
1374         .post_reset =   hid_post_reset,
1375         .id_table =     hid_usb_ids,
1376         .supports_autosuspend = 1,
1377 };
1378
1379 static const struct hid_device_id hid_usb_table[] = {
1380         { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1381         { }
1382 };
1383
1384 static struct hid_driver hid_usb_driver = {
1385         .name = "generic-usb",
1386         .id_table = hid_usb_table,
1387 };
1388
1389 static int __init hid_init(void)
1390 {
1391         int retval = -ENOMEM;
1392
1393         resumption_waker = create_freezeable_workqueue("usbhid_resumer");
1394         if (!resumption_waker)
1395                 goto no_queue;
1396         retval = hid_register_driver(&hid_usb_driver);
1397         if (retval)
1398                 goto hid_register_fail;
1399         retval = usbhid_quirks_init(quirks_param);
1400         if (retval)
1401                 goto usbhid_quirks_init_fail;
1402         retval = hiddev_init();
1403         if (retval)
1404                 goto hiddev_init_fail;
1405         retval = usb_register(&hid_driver);
1406         if (retval)
1407                 goto usb_register_fail;
1408         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1409                         DRIVER_DESC "\n");
1410
1411         return 0;
1412 usb_register_fail:
1413         hiddev_exit();
1414 hiddev_init_fail:
1415         usbhid_quirks_exit();
1416 usbhid_quirks_init_fail:
1417         hid_unregister_driver(&hid_usb_driver);
1418 hid_register_fail:
1419         destroy_workqueue(resumption_waker);
1420 no_queue:
1421         return retval;
1422 }
1423
1424 static void __exit hid_exit(void)
1425 {
1426         usb_deregister(&hid_driver);
1427         hiddev_exit();
1428         usbhid_quirks_exit();
1429         hid_unregister_driver(&hid_usb_driver);
1430         destroy_workqueue(resumption_waker);
1431 }
1432
1433 module_init(hid_init);
1434 module_exit(hid_exit);
1435
1436 MODULE_AUTHOR(DRIVER_AUTHOR);
1437 MODULE_DESCRIPTION(DRIVER_DESC);
1438 MODULE_LICENSE(DRIVER_LICENSE);