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HID: usbhid: enable remote wakeup for keyboards
[linux/fpc-iii.git] / drivers / hid / usbhid / hid-core.c
blob9cd61a52e9e36f512356ac59a32610b21ebffa8a
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
627 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
628 {
629 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
630 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
631 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
632 }
633
634 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
635 unsigned char type, void *buf, int size)
636 {
637 int result, retries = 4;
638
639 memset(buf, 0, size);
640
641 do {
642 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
643 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
644 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
645 retries--;
646 } while (result < size && retries);
647 return result;
648 }
649
650 int usbhid_open(struct hid_device *hid)
651 {
652 struct usbhid_device *usbhid = hid->driver_data;
653 int res;
654
655 mutex_lock(&hid_open_mut);
656 if (!hid->open++) {
657 res = usb_autopm_get_interface(usbhid->intf);
658 /* the device must be awake to reliable request remote wakeup */
659 if (res < 0) {
660 hid->open--;
661 mutex_unlock(&hid_open_mut);
662 return -EIO;
663 }
664 usbhid->intf->needs_remote_wakeup = 1;
665 if (hid_start_in(hid))
666 hid_io_error(hid);
667
668 usb_autopm_put_interface(usbhid->intf);
669 }
670 mutex_unlock(&hid_open_mut);
671 return 0;
672 }
673
674 void usbhid_close(struct hid_device *hid)
675 {
676 struct usbhid_device *usbhid = hid->driver_data;
677
678 mutex_lock(&hid_open_mut);
679
680 /* protecting hid->open to make sure we don't restart
681 * data acquistion due to a resumption we no longer
682 * care about
683 */
684 spin_lock_irq(&usbhid->lock);
685 if (!--hid->open) {
686 spin_unlock_irq(&usbhid->lock);
687 hid_cancel_delayed_stuff(usbhid);
688 usb_kill_urb(usbhid->urbin);
689 usbhid->intf->needs_remote_wakeup = 0;
690 } else {
691 spin_unlock_irq(&usbhid->lock);
692 }
693 mutex_unlock(&hid_open_mut);
694 }
695
696 /*
697 * Initialize all reports
698 */
699
700 void usbhid_init_reports(struct hid_device *hid)
701 {
702 struct hid_report *report;
703 struct usbhid_device *usbhid = hid->driver_data;
704 int err, ret;
705
706 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
707 usbhid_submit_report(hid, report, USB_DIR_IN);
708
709 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
710 usbhid_submit_report(hid, report, USB_DIR_IN);
711
712 err = 0;
713 ret = usbhid_wait_io(hid);
714 while (ret) {
715 err |= ret;
716 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
717 usb_kill_urb(usbhid->urbctrl);
718 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
719 usb_kill_urb(usbhid->urbout);
720 ret = usbhid_wait_io(hid);
721 }
722
723 if (err)
724 dev_warn(&hid->dev, "timeout initializing reports\n");
725 }
726
727 /*
728 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
729 */
730 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
731 unsigned int hid_code, struct hid_field **pfield)
732 {
733 struct hid_report *report;
734 struct hid_field *field;
735 struct hid_usage *usage;
736 int i, j;
737
738 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
739 for (i = 0; i < report->maxfield; i++) {
740 field = report->field[i];
741 for (j = 0; j < field->maxusage; j++) {
742 usage = &field->usage[j];
743 if ((usage->hid & HID_USAGE_PAGE) == page &&
744 (usage->hid & 0xFFFF) == hid_code) {
745 *pfield = field;
746 return j;
747 }
748 }
749 }
750 }
751 return -1;
752 }
753
754 void usbhid_set_leds(struct hid_device *hid)
755 {
756 struct hid_field *field;
757 int offset;
758
759 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
760 hid_set_field(field, offset, 0);
761 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
762 }
763 }
764 EXPORT_SYMBOL_GPL(usbhid_set_leds);
765
766 /*
767 * Traverse the supplied list of reports and find the longest
768 */
769 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
770 unsigned int *max)
771 {
772 struct hid_report *report;
773 unsigned int size;
774
775 list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
776 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
777 if (*max < size)
778 *max = size;
779 }
780 }
781
782 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
783 {
784 struct usbhid_device *usbhid = hid->driver_data;
785
786 usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
787 &usbhid->inbuf_dma);
788 usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
789 &usbhid->outbuf_dma);
790 usbhid->cr = usb_buffer_alloc(dev, sizeof(*usbhid->cr), GFP_KERNEL,
791 &usbhid->cr_dma);
792 usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
793 &usbhid->ctrlbuf_dma);
794 if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
795 !usbhid->ctrlbuf)
796 return -1;
797
798 return 0;
799 }
800
801 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count,
802 unsigned char report_type)
803 {
804 struct usbhid_device *usbhid = hid->driver_data;
805 struct usb_device *dev = hid_to_usb_dev(hid);
806 struct usb_interface *intf = usbhid->intf;
807 struct usb_host_interface *interface = intf->cur_altsetting;
808 int ret;
809
810 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
811 HID_REQ_SET_REPORT,
812 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
813 ((report_type + 1) << 8) | *buf,
814 interface->desc.bInterfaceNumber, buf + 1, count - 1,
815 USB_CTRL_SET_TIMEOUT);
816
817 /* count also the report id */
818 if (ret > 0)
819 ret++;
820
821 return ret;
822 }
823
824 static void usbhid_restart_queues(struct usbhid_device *usbhid)
825 {
826 if (usbhid->urbout)
827 usbhid_restart_out_queue(usbhid);
828 usbhid_restart_ctrl_queue(usbhid);
829 }
830
831 static void __usbhid_restart_queues(struct work_struct *work)
832 {
833 struct usbhid_device *usbhid =
834 container_of(work, struct usbhid_device, restart_work);
835 int r;
836
837 r = usb_autopm_get_interface(usbhid->intf);
838 if (r < 0)
839 return;
840 usb_autopm_put_interface(usbhid->intf);
841 }
842
843 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
844 {
845 struct usbhid_device *usbhid = hid->driver_data;
846
847 usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
848 usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
849 usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
850 usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
851 }
852
853 static int usbhid_parse(struct hid_device *hid)
854 {
855 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
856 struct usb_host_interface *interface = intf->cur_altsetting;
857 struct usb_device *dev = interface_to_usbdev (intf);
858 struct hid_descriptor *hdesc;
859 u32 quirks = 0;
860 unsigned int rsize = 0;
861 char *rdesc;
862 int ret, n;
863
864 quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
865 le16_to_cpu(dev->descriptor.idProduct));
866
867 if (quirks & HID_QUIRK_IGNORE)
868 return -ENODEV;
869
870 /* Many keyboards and mice don't like to be polled for reports,
871 * so we will always set the HID_QUIRK_NOGET flag for them. */
872 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
873 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
874 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
875 quirks |= HID_QUIRK_NOGET;
876 }
877
878 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
879 (!interface->desc.bNumEndpoints ||
880 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
881 dbg_hid("class descriptor not present\n");
882 return -ENODEV;
883 }
884
885 hid->version = le16_to_cpu(hdesc->bcdHID);
886 hid->country = hdesc->bCountryCode;
887
888 for (n = 0; n < hdesc->bNumDescriptors; n++)
889 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
890 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
891
892 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
893 dbg_hid("weird size of report descriptor (%u)\n", rsize);
894 return -EINVAL;
895 }
896
897 if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
898 dbg_hid("couldn't allocate rdesc memory\n");
899 return -ENOMEM;
900 }
901
902 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
903
904 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
905 HID_DT_REPORT, rdesc, rsize);
906 if (ret < 0) {
907 dbg_hid("reading report descriptor failed\n");
908 kfree(rdesc);
909 goto err;
910 }
911
912 ret = hid_parse_report(hid, rdesc, rsize);
913 kfree(rdesc);
914 if (ret) {
915 dbg_hid("parsing report descriptor failed\n");
916 goto err;
917 }
918
919 hid->quirks |= quirks;
920
921 return 0;
922 err:
923 return ret;
924 }
925
926 static int usbhid_start(struct hid_device *hid)
927 {
928 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
929 struct usb_host_interface *interface = intf->cur_altsetting;
930 struct usb_device *dev = interface_to_usbdev(intf);
931 struct usbhid_device *usbhid = hid->driver_data;
932 unsigned int n, insize = 0;
933 int ret;
934
935 clear_bit(HID_DISCONNECTED, &usbhid->iofl);
936
937 usbhid->bufsize = HID_MIN_BUFFER_SIZE;
938 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
939 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
940 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
941
942 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
943 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
944
945 hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
946
947 if (insize > HID_MAX_BUFFER_SIZE)
948 insize = HID_MAX_BUFFER_SIZE;
949
950 if (hid_alloc_buffers(dev, hid)) {
951 ret = -ENOMEM;
952 goto fail;
953 }
954
955 for (n = 0; n < interface->desc.bNumEndpoints; n++) {
956 struct usb_endpoint_descriptor *endpoint;
957 int pipe;
958 int interval;
959
960 endpoint = &interface->endpoint[n].desc;
961 if (!usb_endpoint_xfer_int(endpoint))
962 continue;
963
964 interval = endpoint->bInterval;
965
966 /* Some vendors give fullspeed interval on highspeed devides */
967 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
968 dev->speed == USB_SPEED_HIGH) {
969 interval = fls(endpoint->bInterval*8);
970 printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
971 hid->name, endpoint->bInterval, interval);
972 }
973
974 /* Change the polling interval of mice. */
975 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
976 interval = hid_mousepoll_interval;
977
978 ret = -ENOMEM;
979 if (usb_endpoint_dir_in(endpoint)) {
980 if (usbhid->urbin)
981 continue;
982 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
983 goto fail;
984 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
985 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
986 hid_irq_in, hid, interval);
987 usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
988 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
989 } else {
990 if (usbhid->urbout)
991 continue;
992 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
993 goto fail;
994 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
995 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
996 hid_irq_out, hid, interval);
997 usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
998 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
999 }
1000 }
1001
1002 init_waitqueue_head(&usbhid->wait);
1003 INIT_WORK(&usbhid->reset_work, hid_reset);
1004 INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
1005 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
1006
1007 spin_lock_init(&usbhid->lock);
1008
1009 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
1010 if (!usbhid->urbctrl) {
1011 ret = -ENOMEM;
1012 goto fail;
1013 }
1014
1015 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
1016 usbhid->ctrlbuf, 1, hid_ctrl, hid);
1017 usbhid->urbctrl->setup_dma = usbhid->cr_dma;
1018 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
1019 usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
1020
1021 if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS))
1022 usbhid_init_reports(hid);
1023
1024 set_bit(HID_STARTED, &usbhid->iofl);
1025
1026 /* Some keyboards don't work until their LEDs have been set.
1027 * Since BIOSes do set the LEDs, it must be safe for any device
1028 * that supports the keyboard boot protocol.
1029 * In addition, enable remote wakeup by default for all keyboard
1030 * devices supporting the boot protocol.
1031 */
1032 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1033 interface->desc.bInterfaceProtocol ==
1034 USB_INTERFACE_PROTOCOL_KEYBOARD) {
1035 usbhid_set_leds(hid);
1036 device_set_wakeup_enable(&dev->dev, 1);
1037 }
1038 return 0;
1039
1040 fail:
1041 usb_free_urb(usbhid->urbin);
1042 usb_free_urb(usbhid->urbout);
1043 usb_free_urb(usbhid->urbctrl);
1044 usbhid->urbin = NULL;
1045 usbhid->urbout = NULL;
1046 usbhid->urbctrl = NULL;
1047 hid_free_buffers(dev, hid);
1048 return ret;
1049 }
1050
1051 static void usbhid_stop(struct hid_device *hid)
1052 {
1053 struct usbhid_device *usbhid = hid->driver_data;
1054
1055 if (WARN_ON(!usbhid))
1056 return;
1057
1058 clear_bit(HID_STARTED, &usbhid->iofl);
1059 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1060 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1061 spin_unlock_irq(&usbhid->lock);
1062 usb_kill_urb(usbhid->urbin);
1063 usb_kill_urb(usbhid->urbout);
1064 usb_kill_urb(usbhid->urbctrl);
1065
1066 hid_cancel_delayed_stuff(usbhid);
1067
1068 hid->claimed = 0;
1069
1070 usb_free_urb(usbhid->urbin);
1071 usb_free_urb(usbhid->urbctrl);
1072 usb_free_urb(usbhid->urbout);
1073 usbhid->urbin = NULL; /* don't mess up next start */
1074 usbhid->urbctrl = NULL;
1075 usbhid->urbout = NULL;
1076
1077 hid_free_buffers(hid_to_usb_dev(hid), hid);
1078 }
1079
1080 static int usbhid_power(struct hid_device *hid, int lvl)
1081 {
1082 int r = 0;
1083
1084 switch (lvl) {
1085 case PM_HINT_FULLON:
1086 r = usbhid_get_power(hid);
1087 break;
1088 case PM_HINT_NORMAL:
1089 usbhid_put_power(hid);
1090 break;
1091 }
1092 return r;
1093 }
1094
1095 static struct hid_ll_driver usb_hid_driver = {
1096 .parse = usbhid_parse,
1097 .start = usbhid_start,
1098 .stop = usbhid_stop,
1099 .open = usbhid_open,
1100 .close = usbhid_close,
1101 .power = usbhid_power,
1102 .hidinput_input_event = usb_hidinput_input_event,
1103 };
1104
1105 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1106 {
1107 struct usb_host_interface *interface = intf->cur_altsetting;
1108 struct usb_device *dev = interface_to_usbdev(intf);
1109 struct usbhid_device *usbhid;
1110 struct hid_device *hid;
1111 unsigned int n, has_in = 0;
1112 size_t len;
1113 int ret;
1114
1115 dbg_hid("HID probe called for ifnum %d\n",
1116 intf->altsetting->desc.bInterfaceNumber);
1117
1118 for (n = 0; n < interface->desc.bNumEndpoints; n++)
1119 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1120 has_in++;
1121 if (!has_in) {
1122 dev_err(&intf->dev, "couldn't find an input interrupt "
1123 "endpoint\n");
1124 return -ENODEV;
1125 }
1126
1127 hid = hid_allocate_device();
1128 if (IS_ERR(hid))
1129 return PTR_ERR(hid);
1130
1131 usb_set_intfdata(intf, hid);
1132 hid->ll_driver = &usb_hid_driver;
1133 hid->hid_output_raw_report = usbhid_output_raw_report;
1134 hid->ff_init = hid_pidff_init;
1135 #ifdef CONFIG_USB_HIDDEV
1136 hid->hiddev_connect = hiddev_connect;
1137 hid->hiddev_disconnect = hiddev_disconnect;
1138 hid->hiddev_hid_event = hiddev_hid_event;
1139 hid->hiddev_report_event = hiddev_report_event;
1140 #endif
1141 hid->dev.parent = &intf->dev;
1142 hid->bus = BUS_USB;
1143 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1144 hid->product = le16_to_cpu(dev->descriptor.idProduct);
1145 hid->name[0] = 0;
1146 if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1147 USB_INTERFACE_PROTOCOL_MOUSE)
1148 hid->type = HID_TYPE_USBMOUSE;
1149
1150 if (dev->manufacturer)
1151 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1152
1153 if (dev->product) {
1154 if (dev->manufacturer)
1155 strlcat(hid->name, " ", sizeof(hid->name));
1156 strlcat(hid->name, dev->product, sizeof(hid->name));
1157 }
1158
1159 if (!strlen(hid->name))
1160 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1161 le16_to_cpu(dev->descriptor.idVendor),
1162 le16_to_cpu(dev->descriptor.idProduct));
1163
1164 usb_make_path(dev, hid->phys, sizeof(hid->phys));
1165 strlcat(hid->phys, "/input", sizeof(hid->phys));
1166 len = strlen(hid->phys);
1167 if (len < sizeof(hid->phys) - 1)
1168 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1169 "%d", intf->altsetting[0].desc.bInterfaceNumber);
1170
1171 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1172 hid->uniq[0] = 0;
1173
1174 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1175 if (usbhid == NULL) {
1176 ret = -ENOMEM;
1177 goto err;
1178 }
1179
1180 hid->driver_data = usbhid;
1181 usbhid->hid = hid;
1182 usbhid->intf = intf;
1183 usbhid->ifnum = interface->desc.bInterfaceNumber;
1184
1185 ret = hid_add_device(hid);
1186 if (ret) {
1187 if (ret != -ENODEV)
1188 dev_err(&intf->dev, "can't add hid device: %d\n", ret);
1189 goto err_free;
1190 }
1191
1192 return 0;
1193 err_free:
1194 kfree(usbhid);
1195 err:
1196 hid_destroy_device(hid);
1197 return ret;
1198 }
1199
1200 static void usbhid_disconnect(struct usb_interface *intf)
1201 {
1202 struct hid_device *hid = usb_get_intfdata(intf);
1203 struct usbhid_device *usbhid;
1204
1205 if (WARN_ON(!hid))
1206 return;
1207
1208 usbhid = hid->driver_data;
1209 hid_destroy_device(hid);
1210 kfree(usbhid);
1211 }
1212
1213 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1214 {
1215 del_timer_sync(&usbhid->io_retry);
1216 cancel_work_sync(&usbhid->restart_work);
1217 cancel_work_sync(&usbhid->reset_work);
1218 }
1219
1220 static void hid_cease_io(struct usbhid_device *usbhid)
1221 {
1222 del_timer(&usbhid->io_retry);
1223 usb_kill_urb(usbhid->urbin);
1224 usb_kill_urb(usbhid->urbctrl);
1225 usb_kill_urb(usbhid->urbout);
1226 }
1227
1228 /* Treat USB reset pretty much the same as suspend/resume */
1229 static int hid_pre_reset(struct usb_interface *intf)
1230 {
1231 struct hid_device *hid = usb_get_intfdata(intf);
1232 struct usbhid_device *usbhid = hid->driver_data;
1233
1234 spin_lock_irq(&usbhid->lock);
1235 set_bit(HID_RESET_PENDING, &usbhid->iofl);
1236 spin_unlock_irq(&usbhid->lock);
1237 cancel_work_sync(&usbhid->restart_work);
1238 hid_cease_io(usbhid);
1239
1240 return 0;
1241 }
1242
1243 /* Same routine used for post_reset and reset_resume */
1244 static int hid_post_reset(struct usb_interface *intf)
1245 {
1246 struct usb_device *dev = interface_to_usbdev (intf);
1247 struct hid_device *hid = usb_get_intfdata(intf);
1248 struct usbhid_device *usbhid = hid->driver_data;
1249 int status;
1250
1251 spin_lock_irq(&usbhid->lock);
1252 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1253 spin_unlock_irq(&usbhid->lock);
1254 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1255 status = hid_start_in(hid);
1256 if (status < 0)
1257 hid_io_error(hid);
1258 usbhid_restart_queues(usbhid);
1259
1260 return 0;
1261 }
1262
1263 int usbhid_get_power(struct hid_device *hid)
1264 {
1265 struct usbhid_device *usbhid = hid->driver_data;
1266
1267 return usb_autopm_get_interface(usbhid->intf);
1268 }
1269
1270 void usbhid_put_power(struct hid_device *hid)
1271 {
1272 struct usbhid_device *usbhid = hid->driver_data;
1273
1274 usb_autopm_put_interface(usbhid->intf);
1275 }
1276
1277
1278 #ifdef CONFIG_PM
1279 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1280 {
1281 struct hid_device *hid = usb_get_intfdata(intf);
1282 struct usbhid_device *usbhid = hid->driver_data;
1283 int status;
1284
1285 if (message.event & PM_EVENT_AUTO) {
1286 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1287 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1288 && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1289 && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1290 && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1291 && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1292 && (!usbhid->ledcount || ignoreled))
1293 {
1294 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1295 spin_unlock_irq(&usbhid->lock);
1296 } else {
1297 usbhid_mark_busy(usbhid);
1298 spin_unlock_irq(&usbhid->lock);
1299 return -EBUSY;
1300 }
1301
1302 } else {
1303 spin_lock_irq(&usbhid->lock);
1304 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1305 spin_unlock_irq(&usbhid->lock);
1306 if (usbhid_wait_io(hid) < 0)
1307 return -EIO;
1308 }
1309
1310 if (!ignoreled && (message.event & PM_EVENT_AUTO)) {
1311 spin_lock_irq(&usbhid->lock);
1312 if (test_bit(HID_LED_ON, &usbhid->iofl)) {
1313 spin_unlock_irq(&usbhid->lock);
1314 usbhid_mark_busy(usbhid);
1315 return -EBUSY;
1316 }
1317 spin_unlock_irq(&usbhid->lock);
1318 }
1319
1320 hid_cancel_delayed_stuff(usbhid);
1321 hid_cease_io(usbhid);
1322
1323 if ((message.event & PM_EVENT_AUTO) &&
1324 test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1325 /* lost race against keypresses */
1326 status = hid_start_in(hid);
1327 if (status < 0)
1328 hid_io_error(hid);
1329 usbhid_mark_busy(usbhid);
1330 return -EBUSY;
1331 }
1332 dev_dbg(&intf->dev, "suspend\n");
1333 return 0;
1334 }
1335
1336 static int hid_resume(struct usb_interface *intf)
1337 {
1338 struct hid_device *hid = usb_get_intfdata (intf);
1339 struct usbhid_device *usbhid = hid->driver_data;
1340 int status;
1341
1342 if (!test_bit(HID_STARTED, &usbhid->iofl))
1343 return 0;
1344
1345 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1346 usbhid_mark_busy(usbhid);
1347
1348 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1349 test_bit(HID_RESET_PENDING, &usbhid->iofl))
1350 schedule_work(&usbhid->reset_work);
1351 usbhid->retry_delay = 0;
1352 status = hid_start_in(hid);
1353 if (status < 0)
1354 hid_io_error(hid);
1355 usbhid_restart_queues(usbhid);
1356
1357 dev_dbg(&intf->dev, "resume status %d\n", status);
1358 return 0;
1359 }
1360
1361 static int hid_reset_resume(struct usb_interface *intf)
1362 {
1363 struct hid_device *hid = usb_get_intfdata(intf);
1364 struct usbhid_device *usbhid = hid->driver_data;
1365
1366 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1367 return hid_post_reset(intf);
1368 }
1369
1370 #endif /* CONFIG_PM */
1371
1372 static const struct usb_device_id hid_usb_ids[] = {
1373 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1374 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1375 { } /* Terminating entry */
1376 };
1377
1378 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1379
1380 static struct usb_driver hid_driver = {
1381 .name = "usbhid",
1382 .probe = usbhid_probe,
1383 .disconnect = usbhid_disconnect,
1384 #ifdef CONFIG_PM
1385 .suspend = hid_suspend,
1386 .resume = hid_resume,
1387 .reset_resume = hid_reset_resume,
1388 #endif
1389 .pre_reset = hid_pre_reset,
1390 .post_reset = hid_post_reset,
1391 .id_table = hid_usb_ids,
1392 .supports_autosuspend = 1,
1393 };
1394
1395 static const struct hid_device_id hid_usb_table[] = {
1396 { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1397 { }
1398 };
1399
1400 static struct hid_driver hid_usb_driver = {
1401 .name = "generic-usb",
1402 .id_table = hid_usb_table,
1403 };
1404
1405 static int __init hid_init(void)
1406 {
1407 int retval = -ENOMEM;
1408
1409 resumption_waker = create_freezeable_workqueue("usbhid_resumer");
1410 if (!resumption_waker)
1411 goto no_queue;
1412 retval = hid_register_driver(&hid_usb_driver);
1413 if (retval)
1414 goto hid_register_fail;
1415 retval = usbhid_quirks_init(quirks_param);
1416 if (retval)
1417 goto usbhid_quirks_init_fail;
1418 retval = hiddev_init();
1419 if (retval)
1420 goto hiddev_init_fail;
1421 retval = usb_register(&hid_driver);
1422 if (retval)
1423 goto usb_register_fail;
1424 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1425
1426 return 0;
1427 usb_register_fail:
1428 hiddev_exit();
1429 hiddev_init_fail:
1430 usbhid_quirks_exit();
1431 usbhid_quirks_init_fail:
1432 hid_unregister_driver(&hid_usb_driver);
1433 hid_register_fail:
1434 destroy_workqueue(resumption_waker);
1435 no_queue:
1436 return retval;
1437 }
1438
1439 static void __exit hid_exit(void)
1440 {
1441 usb_deregister(&hid_driver);
1442 hiddev_exit();
1443 usbhid_quirks_exit();
1444 hid_unregister_driver(&hid_usb_driver);
1445 destroy_workqueue(resumption_waker);
1446 }
1447
1448 module_init(hid_init);
1449 module_exit(hid_exit);
1450
1451 MODULE_AUTHOR("Andreas Gal");
1452 MODULE_AUTHOR("Vojtech Pavlik");
1453 MODULE_AUTHOR("Jiri Kosina");
1454 MODULE_DESCRIPTION(DRIVER_DESC);
1455 MODULE_LICENSE(DRIVER_LICENSE);
Linux with added FPC-III support