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Merge branch 'hid-suspend' into picolcd
[linux-2.6/btrfs-unstable.git] / drivers / hid / usbhid / hid-core.c
blob17eb3ec3fbb83cf45009d60dee4ea6037ae412b4
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 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
812 HID_REQ_SET_REPORT,
813 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
814 ((report_type + 1) << 8) | *buf,
815 interface->desc.bInterfaceNumber, buf + 1, count - 1,
816 USB_CTRL_SET_TIMEOUT);
817
818 /* count also the report id */
819 if (ret > 0)
820 ret++;
821
822 return ret;
823 }
824
825 static void usbhid_restart_queues(struct usbhid_device *usbhid)
826 {
827 if (usbhid->urbout)
828 usbhid_restart_out_queue(usbhid);
829 usbhid_restart_ctrl_queue(usbhid);
830 }
831
832 static void __usbhid_restart_queues(struct work_struct *work)
833 {
834 struct usbhid_device *usbhid =
835 container_of(work, struct usbhid_device, restart_work);
836 int r;
837
838 r = usb_autopm_get_interface(usbhid->intf);
839 if (r < 0)
840 return;
841 usb_autopm_put_interface(usbhid->intf);
842 }
843
844 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
845 {
846 struct usbhid_device *usbhid = hid->driver_data;
847
848 usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
849 usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
850 usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
851 usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
852 }
853
854 static int usbhid_parse(struct hid_device *hid)
855 {
856 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
857 struct usb_host_interface *interface = intf->cur_altsetting;
858 struct usb_device *dev = interface_to_usbdev (intf);
859 struct hid_descriptor *hdesc;
860 u32 quirks = 0;
861 unsigned int rsize = 0;
862 char *rdesc;
863 int ret, n;
864
865 quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
866 le16_to_cpu(dev->descriptor.idProduct));
867
868 if (quirks & HID_QUIRK_IGNORE)
869 return -ENODEV;
870
871 /* Many keyboards and mice don't like to be polled for reports,
872 * so we will always set the HID_QUIRK_NOGET flag for them. */
873 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
874 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
875 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
876 quirks |= HID_QUIRK_NOGET;
877 }
878
879 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
880 (!interface->desc.bNumEndpoints ||
881 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
882 dbg_hid("class descriptor not present\n");
883 return -ENODEV;
884 }
885
886 hid->version = le16_to_cpu(hdesc->bcdHID);
887 hid->country = hdesc->bCountryCode;
888
889 for (n = 0; n < hdesc->bNumDescriptors; n++)
890 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
891 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
892
893 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
894 dbg_hid("weird size of report descriptor (%u)\n", rsize);
895 return -EINVAL;
896 }
897
898 if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
899 dbg_hid("couldn't allocate rdesc memory\n");
900 return -ENOMEM;
901 }
902
903 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
904
905 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
906 HID_DT_REPORT, rdesc, rsize);
907 if (ret < 0) {
908 dbg_hid("reading report descriptor failed\n");
909 kfree(rdesc);
910 goto err;
911 }
912
913 ret = hid_parse_report(hid, rdesc, rsize);
914 kfree(rdesc);
915 if (ret) {
916 dbg_hid("parsing report descriptor failed\n");
917 goto err;
918 }
919
920 hid->quirks |= quirks;
921
922 return 0;
923 err:
924 return ret;
925 }
926
927 static int usbhid_start(struct hid_device *hid)
928 {
929 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
930 struct usb_host_interface *interface = intf->cur_altsetting;
931 struct usb_device *dev = interface_to_usbdev(intf);
932 struct usbhid_device *usbhid = hid->driver_data;
933 unsigned int n, insize = 0;
934 int ret;
935
936 clear_bit(HID_DISCONNECTED, &usbhid->iofl);
937
938 usbhid->bufsize = HID_MIN_BUFFER_SIZE;
939 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
940 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
941 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
942
943 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
944 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
945
946 hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
947
948 if (insize > HID_MAX_BUFFER_SIZE)
949 insize = HID_MAX_BUFFER_SIZE;
950
951 if (hid_alloc_buffers(dev, hid)) {
952 ret = -ENOMEM;
953 goto fail;
954 }
955
956 for (n = 0; n < interface->desc.bNumEndpoints; n++) {
957 struct usb_endpoint_descriptor *endpoint;
958 int pipe;
959 int interval;
960
961 endpoint = &interface->endpoint[n].desc;
962 if (!usb_endpoint_xfer_int(endpoint))
963 continue;
964
965 interval = endpoint->bInterval;
966
967 /* Some vendors give fullspeed interval on highspeed devides */
968 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
969 dev->speed == USB_SPEED_HIGH) {
970 interval = fls(endpoint->bInterval*8);
971 printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
972 hid->name, endpoint->bInterval, interval);
973 }
974
975 /* Change the polling interval of mice. */
976 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
977 interval = hid_mousepoll_interval;
978
979 ret = -ENOMEM;
980 if (usb_endpoint_dir_in(endpoint)) {
981 if (usbhid->urbin)
982 continue;
983 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
984 goto fail;
985 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
986 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
987 hid_irq_in, hid, interval);
988 usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
989 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
990 } else {
991 if (usbhid->urbout)
992 continue;
993 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
994 goto fail;
995 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
996 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
997 hid_irq_out, hid, interval);
998 usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
999 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1000 }
1001 }
1002
1003 init_waitqueue_head(&usbhid->wait);
1004 INIT_WORK(&usbhid->reset_work, hid_reset);
1005 INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
1006 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
1007
1008 spin_lock_init(&usbhid->lock);
1009
1010 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
1011 if (!usbhid->urbctrl) {
1012 ret = -ENOMEM;
1013 goto fail;
1014 }
1015
1016 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
1017 usbhid->ctrlbuf, 1, hid_ctrl, hid);
1018 usbhid->urbctrl->setup_dma = usbhid->cr_dma;
1019 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
1020 usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
1021
1022 if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS))
1023 usbhid_init_reports(hid);
1024
1025 set_bit(HID_STARTED, &usbhid->iofl);
1026
1027 /* Some keyboards don't work until their LEDs have been set.
1028 * Since BIOSes do set the LEDs, it must be safe for any device
1029 * that supports the keyboard boot protocol.
1030 */
1031 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1032 interface->desc.bInterfaceProtocol ==
1033 USB_INTERFACE_PROTOCOL_KEYBOARD)
1034 usbhid_set_leds(hid);
1035
1036 return 0;
1037
1038 fail:
1039 usb_free_urb(usbhid->urbin);
1040 usb_free_urb(usbhid->urbout);
1041 usb_free_urb(usbhid->urbctrl);
1042 usbhid->urbin = NULL;
1043 usbhid->urbout = NULL;
1044 usbhid->urbctrl = NULL;
1045 hid_free_buffers(dev, hid);
1046 return ret;
1047 }
1048
1049 static void usbhid_stop(struct hid_device *hid)
1050 {
1051 struct usbhid_device *usbhid = hid->driver_data;
1052
1053 if (WARN_ON(!usbhid))
1054 return;
1055
1056 clear_bit(HID_STARTED, &usbhid->iofl);
1057 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1058 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1059 spin_unlock_irq(&usbhid->lock);
1060 usb_kill_urb(usbhid->urbin);
1061 usb_kill_urb(usbhid->urbout);
1062 usb_kill_urb(usbhid->urbctrl);
1063
1064 hid_cancel_delayed_stuff(usbhid);
1065
1066 hid->claimed = 0;
1067
1068 usb_free_urb(usbhid->urbin);
1069 usb_free_urb(usbhid->urbctrl);
1070 usb_free_urb(usbhid->urbout);
1071 usbhid->urbin = NULL; /* don't mess up next start */
1072 usbhid->urbctrl = NULL;
1073 usbhid->urbout = NULL;
1074
1075 hid_free_buffers(hid_to_usb_dev(hid), hid);
1076 }
1077
1078 static int usbhid_power(struct hid_device *hid, int lvl)
1079 {
1080 int r = 0;
1081
1082 switch (lvl) {
1083 case PM_HINT_FULLON:
1084 r = usbhid_get_power(hid);
1085 break;
1086 case PM_HINT_NORMAL:
1087 usbhid_put_power(hid);
1088 break;
1089 }
1090 return r;
1091 }
1092
1093 static struct hid_ll_driver usb_hid_driver = {
1094 .parse = usbhid_parse,
1095 .start = usbhid_start,
1096 .stop = usbhid_stop,
1097 .open = usbhid_open,
1098 .close = usbhid_close,
1099 .power = usbhid_power,
1100 .hidinput_input_event = usb_hidinput_input_event,
1101 };
1102
1103 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1104 {
1105 struct usb_host_interface *interface = intf->cur_altsetting;
1106 struct usb_device *dev = interface_to_usbdev(intf);
1107 struct usbhid_device *usbhid;
1108 struct hid_device *hid;
1109 unsigned int n, has_in = 0;
1110 size_t len;
1111 int ret;
1112
1113 dbg_hid("HID probe called for ifnum %d\n",
1114 intf->altsetting->desc.bInterfaceNumber);
1115
1116 for (n = 0; n < interface->desc.bNumEndpoints; n++)
1117 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1118 has_in++;
1119 if (!has_in) {
1120 dev_err(&intf->dev, "couldn't find an input interrupt "
1121 "endpoint\n");
1122 return -ENODEV;
1123 }
1124
1125 hid = hid_allocate_device();
1126 if (IS_ERR(hid))
1127 return PTR_ERR(hid);
1128
1129 usb_set_intfdata(intf, hid);
1130 hid->ll_driver = &usb_hid_driver;
1131 hid->hid_output_raw_report = usbhid_output_raw_report;
1132 hid->ff_init = hid_pidff_init;
1133 #ifdef CONFIG_USB_HIDDEV
1134 hid->hiddev_connect = hiddev_connect;
1135 hid->hiddev_disconnect = hiddev_disconnect;
1136 hid->hiddev_hid_event = hiddev_hid_event;
1137 hid->hiddev_report_event = hiddev_report_event;
1138 #endif
1139 hid->dev.parent = &intf->dev;
1140 hid->bus = BUS_USB;
1141 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1142 hid->product = le16_to_cpu(dev->descriptor.idProduct);
1143 hid->name[0] = 0;
1144 if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1145 USB_INTERFACE_PROTOCOL_MOUSE)
1146 hid->type = HID_TYPE_USBMOUSE;
1147
1148 if (dev->manufacturer)
1149 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1150
1151 if (dev->product) {
1152 if (dev->manufacturer)
1153 strlcat(hid->name, " ", sizeof(hid->name));
1154 strlcat(hid->name, dev->product, sizeof(hid->name));
1155 }
1156
1157 if (!strlen(hid->name))
1158 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1159 le16_to_cpu(dev->descriptor.idVendor),
1160 le16_to_cpu(dev->descriptor.idProduct));
1161
1162 usb_make_path(dev, hid->phys, sizeof(hid->phys));
1163 strlcat(hid->phys, "/input", sizeof(hid->phys));
1164 len = strlen(hid->phys);
1165 if (len < sizeof(hid->phys) - 1)
1166 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1167 "%d", intf->altsetting[0].desc.bInterfaceNumber);
1168
1169 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1170 hid->uniq[0] = 0;
1171
1172 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1173 if (usbhid == NULL) {
1174 ret = -ENOMEM;
1175 goto err;
1176 }
1177
1178 hid->driver_data = usbhid;
1179 usbhid->hid = hid;
1180 usbhid->intf = intf;
1181 usbhid->ifnum = interface->desc.bInterfaceNumber;
1182
1183 ret = hid_add_device(hid);
1184 if (ret) {
1185 if (ret != -ENODEV)
1186 dev_err(&intf->dev, "can't add hid device: %d\n", ret);
1187 goto err_free;
1188 }
1189
1190 return 0;
1191 err_free:
1192 kfree(usbhid);
1193 err:
1194 hid_destroy_device(hid);
1195 return ret;
1196 }
1197
1198 static void usbhid_disconnect(struct usb_interface *intf)
1199 {
1200 struct hid_device *hid = usb_get_intfdata(intf);
1201 struct usbhid_device *usbhid;
1202
1203 if (WARN_ON(!hid))
1204 return;
1205
1206 usbhid = hid->driver_data;
1207 hid_destroy_device(hid);
1208 kfree(usbhid);
1209 }
1210
1211 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1212 {
1213 del_timer_sync(&usbhid->io_retry);
1214 cancel_work_sync(&usbhid->restart_work);
1215 cancel_work_sync(&usbhid->reset_work);
1216 }
1217
1218 static void hid_cease_io(struct usbhid_device *usbhid)
1219 {
1220 del_timer(&usbhid->io_retry);
1221 usb_kill_urb(usbhid->urbin);
1222 usb_kill_urb(usbhid->urbctrl);
1223 usb_kill_urb(usbhid->urbout);
1224 }
1225
1226 /* Treat USB reset pretty much the same as suspend/resume */
1227 static int hid_pre_reset(struct usb_interface *intf)
1228 {
1229 struct hid_device *hid = usb_get_intfdata(intf);
1230 struct usbhid_device *usbhid = hid->driver_data;
1231
1232 spin_lock_irq(&usbhid->lock);
1233 set_bit(HID_RESET_PENDING, &usbhid->iofl);
1234 spin_unlock_irq(&usbhid->lock);
1235 cancel_work_sync(&usbhid->restart_work);
1236 hid_cease_io(usbhid);
1237
1238 return 0;
1239 }
1240
1241 /* Same routine used for post_reset and reset_resume */
1242 static int hid_post_reset(struct usb_interface *intf)
1243 {
1244 struct usb_device *dev = interface_to_usbdev (intf);
1245 struct hid_device *hid = usb_get_intfdata(intf);
1246 struct usbhid_device *usbhid = hid->driver_data;
1247 int status;
1248
1249 spin_lock_irq(&usbhid->lock);
1250 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1251 spin_unlock_irq(&usbhid->lock);
1252 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1253 status = hid_start_in(hid);
1254 if (status < 0)
1255 hid_io_error(hid);
1256 usbhid_restart_queues(usbhid);
1257
1258 return 0;
1259 }
1260
1261 int usbhid_get_power(struct hid_device *hid)
1262 {
1263 struct usbhid_device *usbhid = hid->driver_data;
1264
1265 return usb_autopm_get_interface(usbhid->intf);
1266 }
1267
1268 void usbhid_put_power(struct hid_device *hid)
1269 {
1270 struct usbhid_device *usbhid = hid->driver_data;
1271
1272 usb_autopm_put_interface(usbhid->intf);
1273 }
1274
1275
1276 #ifdef CONFIG_PM
1277 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1278 {
1279 struct hid_device *hid = usb_get_intfdata(intf);
1280 struct usbhid_device *usbhid = hid->driver_data;
1281 int status;
1282
1283 if (message.event & PM_EVENT_AUTO) {
1284 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1285 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1286 && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1287 && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1288 && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1289 && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1290 && (!usbhid->ledcount || ignoreled))
1291 {
1292 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1293 spin_unlock_irq(&usbhid->lock);
1294 if (hid->driver && hid->driver->suspend) {
1295 status = hid->driver->suspend(hid, message);
1296 if (status < 0)
1297 return status;
1298 }
1299 } else {
1300 usbhid_mark_busy(usbhid);
1301 spin_unlock_irq(&usbhid->lock);
1302 return -EBUSY;
1303 }
1304
1305 } else {
1306 if (hid->driver && hid->driver->suspend) {
1307 status = hid->driver->suspend(hid, message);
1308 if (status < 0)
1309 return status;
1310 }
1311 spin_lock_irq(&usbhid->lock);
1312 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1313 spin_unlock_irq(&usbhid->lock);
1314 if (usbhid_wait_io(hid) < 0)
1315 return -EIO;
1316 }
1317
1318 if (!ignoreled && (message.event & PM_EVENT_AUTO)) {
1319 spin_lock_irq(&usbhid->lock);
1320 if (test_bit(HID_LED_ON, &usbhid->iofl)) {
1321 spin_unlock_irq(&usbhid->lock);
1322 usbhid_mark_busy(usbhid);
1323 return -EBUSY;
1324 }
1325 spin_unlock_irq(&usbhid->lock);
1326 }
1327
1328 hid_cancel_delayed_stuff(usbhid);
1329 hid_cease_io(usbhid);
1330
1331 if ((message.event & PM_EVENT_AUTO) &&
1332 test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1333 /* lost race against keypresses */
1334 status = hid_start_in(hid);
1335 if (status < 0)
1336 hid_io_error(hid);
1337 usbhid_mark_busy(usbhid);
1338 return -EBUSY;
1339 }
1340 dev_dbg(&intf->dev, "suspend\n");
1341 return 0;
1342 }
1343
1344 static int hid_resume(struct usb_interface *intf)
1345 {
1346 struct hid_device *hid = usb_get_intfdata (intf);
1347 struct usbhid_device *usbhid = hid->driver_data;
1348 int status;
1349
1350 if (!test_bit(HID_STARTED, &usbhid->iofl))
1351 return 0;
1352
1353 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1354 usbhid_mark_busy(usbhid);
1355
1356 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1357 test_bit(HID_RESET_PENDING, &usbhid->iofl))
1358 schedule_work(&usbhid->reset_work);
1359 usbhid->retry_delay = 0;
1360 status = hid_start_in(hid);
1361 if (status < 0)
1362 hid_io_error(hid);
1363 usbhid_restart_queues(usbhid);
1364
1365 if (status >= 0 && hid->driver && hid->driver->resume) {
1366 int ret = hid->driver->resume(hid);
1367 if (ret < 0)
1368 status = ret;
1369 }
1370 dev_dbg(&intf->dev, "resume status %d\n", status);
1371 return 0;
1372 }
1373
1374 static int hid_reset_resume(struct usb_interface *intf)
1375 {
1376 struct hid_device *hid = usb_get_intfdata(intf);
1377 struct usbhid_device *usbhid = hid->driver_data;
1378 int status;
1379
1380 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1381 status = hid_post_reset(intf);
1382 if (status >= 0 && hid->driver && hid->driver->reset_resume) {
1383 int ret = hid->driver->reset_resume(hid);
1384 if (ret < 0)
1385 status = ret;
1386 }
1387 return status;
1388 }
1389
1390 #endif /* CONFIG_PM */
1391
1392 static const struct usb_device_id hid_usb_ids[] = {
1393 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1394 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1395 { } /* Terminating entry */
1396 };
1397
1398 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1399
1400 static struct usb_driver hid_driver = {
1401 .name = "usbhid",
1402 .probe = usbhid_probe,
1403 .disconnect = usbhid_disconnect,
1404 #ifdef CONFIG_PM
1405 .suspend = hid_suspend,
1406 .resume = hid_resume,
1407 .reset_resume = hid_reset_resume,
1408 #endif
1409 .pre_reset = hid_pre_reset,
1410 .post_reset = hid_post_reset,
1411 .id_table = hid_usb_ids,
1412 .supports_autosuspend = 1,
1413 };
1414
1415 static const struct hid_device_id hid_usb_table[] = {
1416 { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1417 { }
1418 };
1419
1420 static struct hid_driver hid_usb_driver = {
1421 .name = "generic-usb",
1422 .id_table = hid_usb_table,
1423 };
1424
1425 static int __init hid_init(void)
1426 {
1427 int retval = -ENOMEM;
1428
1429 resumption_waker = create_freezeable_workqueue("usbhid_resumer");
1430 if (!resumption_waker)
1431 goto no_queue;
1432 retval = hid_register_driver(&hid_usb_driver);
1433 if (retval)
1434 goto hid_register_fail;
1435 retval = usbhid_quirks_init(quirks_param);
1436 if (retval)
1437 goto usbhid_quirks_init_fail;
1438 retval = hiddev_init();
1439 if (retval)
1440 goto hiddev_init_fail;
1441 retval = usb_register(&hid_driver);
1442 if (retval)
1443 goto usb_register_fail;
1444 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1445
1446 return 0;
1447 usb_register_fail:
1448 hiddev_exit();
1449 hiddev_init_fail:
1450 usbhid_quirks_exit();
1451 usbhid_quirks_init_fail:
1452 hid_unregister_driver(&hid_usb_driver);
1453 hid_register_fail:
1454 destroy_workqueue(resumption_waker);
1455 no_queue:
1456 return retval;
1457 }
1458
1459 static void __exit hid_exit(void)
1460 {
1461 usb_deregister(&hid_driver);
1462 hiddev_exit();
1463 usbhid_quirks_exit();
1464 hid_unregister_driver(&hid_usb_driver);
1465 destroy_workqueue(resumption_waker);
1466 }
1467
1468 module_init(hid_init);
1469 module_exit(hid_exit);
1470
1471 MODULE_AUTHOR("Andreas Gal");
1472 MODULE_AUTHOR("Vojtech Pavlik");
1473 MODULE_AUTHOR("Jiri Kosina");
1474 MODULE_DESCRIPTION(DRIVER_DESC);
1475 MODULE_LICENSE(DRIVER_LICENSE);
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