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Merge branch 'master' into upstream
[linux-2.6/next.git] / drivers / hid / usbhid / hid-core.c
blob54060741d45b2ceddca10bb6a64dbd6af0071afb
1 /*
2 * USB HID support for Linux
3 *
4 * Copyright (c) 1999 Andreas Gal
5 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
6 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
7 * Copyright (c) 2007-2008 Oliver Neukum
8 * Copyright (c) 2006-2010 Jiri Kosina
9 */
10
11 /*
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the Free
14 * Software Foundation; either version 2 of the License, or (at your option)
15 * any later version.
16 */
17
18 #include <linux/module.h>
19 #include <linux/slab.h>
20 #include <linux/init.h>
21 #include <linux/kernel.h>
22 #include <linux/list.h>
23 #include <linux/mm.h>
24 #include <linux/mutex.h>
25 #include <linux/spinlock.h>
26 #include <asm/unaligned.h>
27 #include <asm/byteorder.h>
28 #include <linux/input.h>
29 #include <linux/wait.h>
30 #include <linux/workqueue.h>
31
32 #include <linux/usb.h>
33
34 #include <linux/hid.h>
35 #include <linux/hiddev.h>
36 #include <linux/hid-debug.h>
37 #include <linux/hidraw.h>
38 #include "usbhid.h"
39
40 /*
41 * Version Information
42 */
43
44 #define DRIVER_DESC "USB HID core driver"
45 #define DRIVER_LICENSE "GPL"
46
47 /*
48 * Module parameters.
49 */
50
51 static unsigned int hid_mousepoll_interval;
52 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
53 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
54
55 static unsigned int ignoreled;
56 module_param_named(ignoreled, ignoreled, uint, 0644);
57 MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds");
58
59 /* Quirks specified at module load time */
60 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
61 module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
62 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
63 " quirks=vendorID:productID:quirks"
64 " where vendorID, productID, and quirks are all in"
65 " 0x-prefixed hex");
66 /*
67 * Input submission and I/O error handler.
68 */
69 static DEFINE_MUTEX(hid_open_mut);
70 static struct workqueue_struct *resumption_waker;
71
72 static void hid_io_error(struct hid_device *hid);
73 static int hid_submit_out(struct hid_device *hid);
74 static int hid_submit_ctrl(struct hid_device *hid);
75 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid);
76
77 /* Start up the input URB */
78 static int hid_start_in(struct hid_device *hid)
79 {
80 unsigned long flags;
81 int rc = 0;
82 struct usbhid_device *usbhid = hid->driver_data;
83
84 spin_lock_irqsave(&usbhid->lock, flags);
85 if (hid->open > 0 &&
86 !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
87 !test_bit(HID_REPORTED_IDLE, &usbhid->iofl) &&
88 !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
89 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
90 if (rc != 0)
91 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
92 }
93 spin_unlock_irqrestore(&usbhid->lock, flags);
94 return rc;
95 }
96
97 /* I/O retry timer routine */
98 static void hid_retry_timeout(unsigned long _hid)
99 {
100 struct hid_device *hid = (struct hid_device *) _hid;
101 struct usbhid_device *usbhid = hid->driver_data;
102
103 dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
104 if (hid_start_in(hid))
105 hid_io_error(hid);
106 }
107
108 /* Workqueue routine to reset the device or clear a halt */
109 static void hid_reset(struct work_struct *work)
110 {
111 struct usbhid_device *usbhid =
112 container_of(work, struct usbhid_device, reset_work);
113 struct hid_device *hid = usbhid->hid;
114 int rc = 0;
115
116 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
117 dev_dbg(&usbhid->intf->dev, "clear halt\n");
118 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
119 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
120 hid_start_in(hid);
121 }
122
123 else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
124 dev_dbg(&usbhid->intf->dev, "resetting device\n");
125 rc = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
126 if (rc == 0) {
127 rc = usb_reset_device(hid_to_usb_dev(hid));
128 usb_unlock_device(hid_to_usb_dev(hid));
129 }
130 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
131 }
132
133 switch (rc) {
134 case 0:
135 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
136 hid_io_error(hid);
137 break;
138 default:
139 err_hid("can't reset device, %s-%s/input%d, status %d",
140 hid_to_usb_dev(hid)->bus->bus_name,
141 hid_to_usb_dev(hid)->devpath,
142 usbhid->ifnum, rc);
143 /* FALLTHROUGH */
144 case -EHOSTUNREACH:
145 case -ENODEV:
146 case -EINTR:
147 break;
148 }
149 }
150
151 /* Main I/O error handler */
152 static void hid_io_error(struct hid_device *hid)
153 {
154 unsigned long flags;
155 struct usbhid_device *usbhid = hid->driver_data;
156
157 spin_lock_irqsave(&usbhid->lock, flags);
158
159 /* Stop when disconnected */
160 if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
161 goto done;
162
163 /* If it has been a while since the last error, we'll assume
164 * this a brand new error and reset the retry timeout. */
165 if (time_after(jiffies, usbhid->stop_retry + HZ/2))
166 usbhid->retry_delay = 0;
167
168 /* When an error occurs, retry at increasing intervals */
169 if (usbhid->retry_delay == 0) {
170 usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */
171 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
172 } else if (usbhid->retry_delay < 100)
173 usbhid->retry_delay *= 2;
174
175 if (time_after(jiffies, usbhid->stop_retry)) {
176
177 /* Retries failed, so do a port reset */
178 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
179 schedule_work(&usbhid->reset_work);
180 goto done;
181 }
182 }
183
184 mod_timer(&usbhid->io_retry,
185 jiffies + msecs_to_jiffies(usbhid->retry_delay));
186 done:
187 spin_unlock_irqrestore(&usbhid->lock, flags);
188 }
189
190 static void usbhid_mark_busy(struct usbhid_device *usbhid)
191 {
192 struct usb_interface *intf = usbhid->intf;
193
194 usb_mark_last_busy(interface_to_usbdev(intf));
195 }
196
197 static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
198 {
199 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
200 int kicked;
201
202 if (!hid)
203 return 0;
204
205 if ((kicked = (usbhid->outhead != usbhid->outtail))) {
206 dbg("Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
207 if (hid_submit_out(hid)) {
208 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
209 wake_up(&usbhid->wait);
210 }
211 }
212 return kicked;
213 }
214
215 static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
216 {
217 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
218 int kicked;
219
220 WARN_ON(hid == NULL);
221 if (!hid)
222 return 0;
223
224 if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
225 dbg("Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
226 if (hid_submit_ctrl(hid)) {
227 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
228 wake_up(&usbhid->wait);
229 }
230 }
231 return kicked;
232 }
233
234 /*
235 * Input interrupt completion handler.
236 */
237
238 static void hid_irq_in(struct urb *urb)
239 {
240 struct hid_device *hid = urb->context;
241 struct usbhid_device *usbhid = hid->driver_data;
242 int status;
243
244 switch (urb->status) {
245 case 0: /* success */
246 usbhid_mark_busy(usbhid);
247 usbhid->retry_delay = 0;
248 hid_input_report(urb->context, HID_INPUT_REPORT,
249 urb->transfer_buffer,
250 urb->actual_length, 1);
251 /*
252 * autosuspend refused while keys are pressed
253 * because most keyboards don't wake up when
254 * a key is released
255 */
256 if (hid_check_keys_pressed(hid))
257 set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
258 else
259 clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
260 break;
261 case -EPIPE: /* stall */
262 usbhid_mark_busy(usbhid);
263 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
264 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
265 schedule_work(&usbhid->reset_work);
266 return;
267 case -ECONNRESET: /* unlink */
268 case -ENOENT:
269 case -ESHUTDOWN: /* unplug */
270 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
271 return;
272 case -EILSEQ: /* protocol error or unplug */
273 case -EPROTO: /* protocol error or unplug */
274 case -ETIME: /* protocol error or unplug */
275 case -ETIMEDOUT: /* Should never happen, but... */
276 usbhid_mark_busy(usbhid);
277 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
278 hid_io_error(hid);
279 return;
280 default: /* error */
281 dev_warn(&urb->dev->dev, "input irq status %d "
282 "received\n", urb->status);
283 }
284
285 status = usb_submit_urb(urb, GFP_ATOMIC);
286 if (status) {
287 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
288 if (status != -EPERM) {
289 err_hid("can't resubmit intr, %s-%s/input%d, status %d",
290 hid_to_usb_dev(hid)->bus->bus_name,
291 hid_to_usb_dev(hid)->devpath,
292 usbhid->ifnum, status);
293 hid_io_error(hid);
294 }
295 }
296 }
297
298 static int hid_submit_out(struct hid_device *hid)
299 {
300 struct hid_report *report;
301 char *raw_report;
302 struct usbhid_device *usbhid = hid->driver_data;
303
304 report = usbhid->out[usbhid->outtail].report;
305 raw_report = usbhid->out[usbhid->outtail].raw_report;
306
307 if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
308 usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
309 usbhid->urbout->dev = hid_to_usb_dev(hid);
310 memcpy(usbhid->outbuf, raw_report, usbhid->urbout->transfer_buffer_length);
311 kfree(raw_report);
312
313 dbg_hid("submitting out urb\n");
314
315 if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
316 err_hid("usb_submit_urb(out) failed");
317 return -1;
318 }
319 } else {
320 /*
321 * queue work to wake up the device.
322 * as the work queue is freezeable, this is safe
323 * with respect to STD and STR
324 */
325 queue_work(resumption_waker, &usbhid->restart_work);
326 }
327
328 return 0;
329 }
330
331 static int hid_submit_ctrl(struct hid_device *hid)
332 {
333 struct hid_report *report;
334 unsigned char dir;
335 char *raw_report;
336 int len;
337 struct usbhid_device *usbhid = hid->driver_data;
338
339 report = usbhid->ctrl[usbhid->ctrltail].report;
340 raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
341 dir = usbhid->ctrl[usbhid->ctrltail].dir;
342
343 if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
344 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
345 if (dir == USB_DIR_OUT) {
346 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
347 usbhid->urbctrl->transfer_buffer_length = len;
348 memcpy(usbhid->ctrlbuf, raw_report, len);
349 kfree(raw_report);
350 } else {
351 int maxpacket, padlen;
352
353 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
354 maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
355 if (maxpacket > 0) {
356 padlen = DIV_ROUND_UP(len, maxpacket);
357 padlen *= maxpacket;
358 if (padlen > usbhid->bufsize)
359 padlen = usbhid->bufsize;
360 } else
361 padlen = 0;
362 usbhid->urbctrl->transfer_buffer_length = padlen;
363 }
364 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
365
366 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
367 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
368 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
369 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
370 usbhid->cr->wLength = cpu_to_le16(len);
371
372 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
373 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
374 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
375
376 if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
377 err_hid("usb_submit_urb(ctrl) failed");
378 return -1;
379 }
380 } else {
381 /*
382 * queue work to wake up the device.
383 * as the work queue is freezeable, this is safe
384 * with respect to STD and STR
385 */
386 queue_work(resumption_waker, &usbhid->restart_work);
387 }
388
389 return 0;
390 }
391
392 /*
393 * Output interrupt completion handler.
394 */
395
396 static void hid_irq_out(struct urb *urb)
397 {
398 struct hid_device *hid = urb->context;
399 struct usbhid_device *usbhid = hid->driver_data;
400 unsigned long flags;
401 int unplug = 0;
402
403 switch (urb->status) {
404 case 0: /* success */
405 break;
406 case -ESHUTDOWN: /* unplug */
407 unplug = 1;
408 case -EILSEQ: /* protocol error or unplug */
409 case -EPROTO: /* protocol error or unplug */
410 case -ECONNRESET: /* unlink */
411 case -ENOENT:
412 break;
413 default: /* error */
414 dev_warn(&urb->dev->dev, "output irq status %d "
415 "received\n", urb->status);
416 }
417
418 spin_lock_irqsave(&usbhid->lock, flags);
419
420 if (unplug)
421 usbhid->outtail = usbhid->outhead;
422 else
423 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
424
425 if (usbhid->outhead != usbhid->outtail) {
426 if (hid_submit_out(hid)) {
427 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
428 wake_up(&usbhid->wait);
429 }
430 spin_unlock_irqrestore(&usbhid->lock, flags);
431 return;
432 }
433
434 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
435 spin_unlock_irqrestore(&usbhid->lock, flags);
436 wake_up(&usbhid->wait);
437 }
438
439 /*
440 * Control pipe completion handler.
441 */
442
443 static void hid_ctrl(struct urb *urb)
444 {
445 struct hid_device *hid = urb->context;
446 struct usbhid_device *usbhid = hid->driver_data;
447 int unplug = 0, status = urb->status;
448
449 spin_lock(&usbhid->lock);
450
451 switch (status) {
452 case 0: /* success */
453 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
454 hid_input_report(urb->context,
455 usbhid->ctrl[usbhid->ctrltail].report->type,
456 urb->transfer_buffer, urb->actual_length, 0);
457 break;
458 case -ESHUTDOWN: /* unplug */
459 unplug = 1;
460 case -EILSEQ: /* protocol error or unplug */
461 case -EPROTO: /* protocol error or unplug */
462 case -ECONNRESET: /* unlink */
463 case -ENOENT:
464 case -EPIPE: /* report not available */
465 break;
466 default: /* error */
467 dev_warn(&urb->dev->dev, "ctrl urb status %d "
468 "received\n", status);
469 }
470
471 if (unplug)
472 usbhid->ctrltail = usbhid->ctrlhead;
473 else
474 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
475
476 if (usbhid->ctrlhead != usbhid->ctrltail) {
477 if (hid_submit_ctrl(hid)) {
478 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
479 wake_up(&usbhid->wait);
480 }
481 spin_unlock(&usbhid->lock);
482 return;
483 }
484
485 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
486 spin_unlock(&usbhid->lock);
487 wake_up(&usbhid->wait);
488 }
489
490 static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
491 unsigned char dir)
492 {
493 int head;
494 struct usbhid_device *usbhid = hid->driver_data;
495 int len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
496
497 if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
498 return;
499
500 if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
501 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
502 dev_warn(&hid->dev, "output queue full\n");
503 return;
504 }
505
506 usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC);
507 if (!usbhid->out[usbhid->outhead].raw_report) {
508 dev_warn(&hid->dev, "output queueing failed\n");
509 return;
510 }
511 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
512 usbhid->out[usbhid->outhead].report = report;
513 usbhid->outhead = head;
514
515 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl))
516 if (hid_submit_out(hid))
517 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
518 return;
519 }
520
521 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
522 dev_warn(&hid->dev, "control queue full\n");
523 return;
524 }
525
526 if (dir == USB_DIR_OUT) {
527 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC);
528 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
529 dev_warn(&hid->dev, "control queueing failed\n");
530 return;
531 }
532 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
533 }
534 usbhid->ctrl[usbhid->ctrlhead].report = report;
535 usbhid->ctrl[usbhid->ctrlhead].dir = dir;
536 usbhid->ctrlhead = head;
537
538 if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
539 if (hid_submit_ctrl(hid))
540 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
541 }
542
543 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
544 {
545 struct usbhid_device *usbhid = hid->driver_data;
546 unsigned long flags;
547
548 spin_lock_irqsave(&usbhid->lock, flags);
549 __usbhid_submit_report(hid, report, dir);
550 spin_unlock_irqrestore(&usbhid->lock, flags);
551 }
552 EXPORT_SYMBOL_GPL(usbhid_submit_report);
553
554 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
555 {
556 struct hid_device *hid = input_get_drvdata(dev);
557 struct usbhid_device *usbhid = hid->driver_data;
558 struct hid_field *field;
559 unsigned long flags;
560 int offset;
561
562 if (type == EV_FF)
563 return input_ff_event(dev, type, code, value);
564
565 if (type != EV_LED)
566 return -1;
567
568 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
569 dev_warn(&dev->dev, "event field not found\n");
570 return -1;
571 }
572
573 hid_set_field(field, offset, value);
574 if (value) {
575 spin_lock_irqsave(&usbhid->lock, flags);
576 usbhid->ledcount++;
577 spin_unlock_irqrestore(&usbhid->lock, flags);
578 } else {
579 spin_lock_irqsave(&usbhid->lock, flags);
580 usbhid->ledcount--;
581 spin_unlock_irqrestore(&usbhid->lock, flags);
582 }
583 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
584
585 return 0;
586 }
587
588 int usbhid_wait_io(struct hid_device *hid)
589 {
590 struct usbhid_device *usbhid = hid->driver_data;
591
592 if (!wait_event_timeout(usbhid->wait,
593 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
594 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
595 10*HZ)) {
596 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
597 return -1;
598 }
599
600 return 0;
601 }
602
603 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
604 {
605 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
606 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
607 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
608 }
609
610 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
611 unsigned char type, void *buf, int size)
612 {
613 int result, retries = 4;
614
615 memset(buf, 0, size);
616
617 do {
618 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
619 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
620 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
621 retries--;
622 } while (result < size && retries);
623 return result;
624 }
625
626 int usbhid_open(struct hid_device *hid)
627 {
628 struct usbhid_device *usbhid = hid->driver_data;
629 int res;
630
631 mutex_lock(&hid_open_mut);
632 if (!hid->open++) {
633 res = usb_autopm_get_interface(usbhid->intf);
634 /* the device must be awake to reliable request remote wakeup */
635 if (res < 0) {
636 hid->open--;
637 mutex_unlock(&hid_open_mut);
638 return -EIO;
639 }
640 usbhid->intf->needs_remote_wakeup = 1;
641 if (hid_start_in(hid))
642 hid_io_error(hid);
643
644 usb_autopm_put_interface(usbhid->intf);
645 }
646 mutex_unlock(&hid_open_mut);
647 return 0;
648 }
649
650 void usbhid_close(struct hid_device *hid)
651 {
652 struct usbhid_device *usbhid = hid->driver_data;
653
654 mutex_lock(&hid_open_mut);
655
656 /* protecting hid->open to make sure we don't restart
657 * data acquistion due to a resumption we no longer
658 * care about
659 */
660 spin_lock_irq(&usbhid->lock);
661 if (!--hid->open) {
662 spin_unlock_irq(&usbhid->lock);
663 hid_cancel_delayed_stuff(usbhid);
664 usb_kill_urb(usbhid->urbin);
665 usbhid->intf->needs_remote_wakeup = 0;
666 } else {
667 spin_unlock_irq(&usbhid->lock);
668 }
669 mutex_unlock(&hid_open_mut);
670 }
671
672 /*
673 * Initialize all reports
674 */
675
676 void usbhid_init_reports(struct hid_device *hid)
677 {
678 struct hid_report *report;
679 struct usbhid_device *usbhid = hid->driver_data;
680 int err, ret;
681
682 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
683 usbhid_submit_report(hid, report, USB_DIR_IN);
684
685 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
686 usbhid_submit_report(hid, report, USB_DIR_IN);
687
688 err = 0;
689 ret = usbhid_wait_io(hid);
690 while (ret) {
691 err |= ret;
692 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
693 usb_kill_urb(usbhid->urbctrl);
694 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
695 usb_kill_urb(usbhid->urbout);
696 ret = usbhid_wait_io(hid);
697 }
698
699 if (err)
700 dev_warn(&hid->dev, "timeout initializing reports\n");
701 }
702
703 /*
704 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
705 */
706 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
707 unsigned int hid_code, struct hid_field **pfield)
708 {
709 struct hid_report *report;
710 struct hid_field *field;
711 struct hid_usage *usage;
712 int i, j;
713
714 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
715 for (i = 0; i < report->maxfield; i++) {
716 field = report->field[i];
717 for (j = 0; j < field->maxusage; j++) {
718 usage = &field->usage[j];
719 if ((usage->hid & HID_USAGE_PAGE) == page &&
720 (usage->hid & 0xFFFF) == hid_code) {
721 *pfield = field;
722 return j;
723 }
724 }
725 }
726 }
727 return -1;
728 }
729
730 void usbhid_set_leds(struct hid_device *hid)
731 {
732 struct hid_field *field;
733 int offset;
734
735 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
736 hid_set_field(field, offset, 0);
737 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
738 }
739 }
740 EXPORT_SYMBOL_GPL(usbhid_set_leds);
741
742 /*
743 * Traverse the supplied list of reports and find the longest
744 */
745 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
746 unsigned int *max)
747 {
748 struct hid_report *report;
749 unsigned int size;
750
751 list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
752 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
753 if (*max < size)
754 *max = size;
755 }
756 }
757
758 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
759 {
760 struct usbhid_device *usbhid = hid->driver_data;
761
762 usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
763 &usbhid->inbuf_dma);
764 usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
765 &usbhid->outbuf_dma);
766 usbhid->cr = usb_buffer_alloc(dev, sizeof(*usbhid->cr), GFP_KERNEL,
767 &usbhid->cr_dma);
768 usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
769 &usbhid->ctrlbuf_dma);
770 if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
771 !usbhid->ctrlbuf)
772 return -1;
773
774 return 0;
775 }
776
777 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
778 {
779 struct usbhid_device *usbhid = hid->driver_data;
780 struct usb_device *dev = hid_to_usb_dev(hid);
781 struct usb_interface *intf = usbhid->intf;
782 struct usb_host_interface *interface = intf->cur_altsetting;
783 int ret;
784
785 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
786 HID_REQ_SET_REPORT,
787 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
788 ((HID_OUTPUT_REPORT + 1) << 8) | *buf,
789 interface->desc.bInterfaceNumber, buf + 1, count - 1,
790 USB_CTRL_SET_TIMEOUT);
791
792 /* count also the report id */
793 if (ret > 0)
794 ret++;
795
796 return ret;
797 }
798
799 static void usbhid_restart_queues(struct usbhid_device *usbhid)
800 {
801 if (usbhid->urbout)
802 usbhid_restart_out_queue(usbhid);
803 usbhid_restart_ctrl_queue(usbhid);
804 }
805
806 static void __usbhid_restart_queues(struct work_struct *work)
807 {
808 struct usbhid_device *usbhid =
809 container_of(work, struct usbhid_device, restart_work);
810 int r;
811
812 r = usb_autopm_get_interface(usbhid->intf);
813 if (r < 0)
814 return;
815 usb_autopm_put_interface(usbhid->intf);
816 }
817
818 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
819 {
820 struct usbhid_device *usbhid = hid->driver_data;
821
822 usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
823 usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
824 usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
825 usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
826 }
827
828 static int usbhid_parse(struct hid_device *hid)
829 {
830 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
831 struct usb_host_interface *interface = intf->cur_altsetting;
832 struct usb_device *dev = interface_to_usbdev (intf);
833 struct hid_descriptor *hdesc;
834 u32 quirks = 0;
835 unsigned int rsize = 0;
836 char *rdesc;
837 int ret, n;
838
839 quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
840 le16_to_cpu(dev->descriptor.idProduct));
841
842 if (quirks & HID_QUIRK_IGNORE)
843 return -ENODEV;
844
845 /* Many keyboards and mice don't like to be polled for reports,
846 * so we will always set the HID_QUIRK_NOGET flag for them. */
847 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
848 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
849 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
850 quirks |= HID_QUIRK_NOGET;
851 }
852
853 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
854 (!interface->desc.bNumEndpoints ||
855 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
856 dbg_hid("class descriptor not present\n");
857 return -ENODEV;
858 }
859
860 hid->version = le16_to_cpu(hdesc->bcdHID);
861 hid->country = hdesc->bCountryCode;
862
863 for (n = 0; n < hdesc->bNumDescriptors; n++)
864 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
865 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
866
867 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
868 dbg_hid("weird size of report descriptor (%u)\n", rsize);
869 return -EINVAL;
870 }
871
872 if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
873 dbg_hid("couldn't allocate rdesc memory\n");
874 return -ENOMEM;
875 }
876
877 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
878
879 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
880 HID_DT_REPORT, rdesc, rsize);
881 if (ret < 0) {
882 dbg_hid("reading report descriptor failed\n");
883 kfree(rdesc);
884 goto err;
885 }
886
887 ret = hid_parse_report(hid, rdesc, rsize);
888 kfree(rdesc);
889 if (ret) {
890 dbg_hid("parsing report descriptor failed\n");
891 goto err;
892 }
893
894 hid->quirks |= quirks;
895
896 return 0;
897 err:
898 return ret;
899 }
900
901 static int usbhid_start(struct hid_device *hid)
902 {
903 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
904 struct usb_host_interface *interface = intf->cur_altsetting;
905 struct usb_device *dev = interface_to_usbdev(intf);
906 struct usbhid_device *usbhid = hid->driver_data;
907 unsigned int n, insize = 0;
908 int ret;
909
910 clear_bit(HID_DISCONNECTED, &usbhid->iofl);
911
912 usbhid->bufsize = HID_MIN_BUFFER_SIZE;
913 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
914 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
915 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
916
917 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
918 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
919
920 hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
921
922 if (insize > HID_MAX_BUFFER_SIZE)
923 insize = HID_MAX_BUFFER_SIZE;
924
925 if (hid_alloc_buffers(dev, hid)) {
926 ret = -ENOMEM;
927 goto fail;
928 }
929
930 for (n = 0; n < interface->desc.bNumEndpoints; n++) {
931 struct usb_endpoint_descriptor *endpoint;
932 int pipe;
933 int interval;
934
935 endpoint = &interface->endpoint[n].desc;
936 if (!usb_endpoint_xfer_int(endpoint))
937 continue;
938
939 interval = endpoint->bInterval;
940
941 /* Some vendors give fullspeed interval on highspeed devides */
942 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
943 dev->speed == USB_SPEED_HIGH) {
944 interval = fls(endpoint->bInterval*8);
945 printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
946 hid->name, endpoint->bInterval, interval);
947 }
948
949 /* Change the polling interval of mice. */
950 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
951 interval = hid_mousepoll_interval;
952
953 ret = -ENOMEM;
954 if (usb_endpoint_dir_in(endpoint)) {
955 if (usbhid->urbin)
956 continue;
957 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
958 goto fail;
959 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
960 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
961 hid_irq_in, hid, interval);
962 usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
963 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
964 } else {
965 if (usbhid->urbout)
966 continue;
967 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
968 goto fail;
969 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
970 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
971 hid_irq_out, hid, interval);
972 usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
973 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
974 }
975 }
976
977 init_waitqueue_head(&usbhid->wait);
978 INIT_WORK(&usbhid->reset_work, hid_reset);
979 INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
980 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
981
982 spin_lock_init(&usbhid->lock);
983
984 usbhid->intf = intf;
985 usbhid->ifnum = interface->desc.bInterfaceNumber;
986
987 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
988 if (!usbhid->urbctrl) {
989 ret = -ENOMEM;
990 goto fail;
991 }
992
993 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
994 usbhid->ctrlbuf, 1, hid_ctrl, hid);
995 usbhid->urbctrl->setup_dma = usbhid->cr_dma;
996 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
997 usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
998
999 if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS))
1000 usbhid_init_reports(hid);
1001
1002 set_bit(HID_STARTED, &usbhid->iofl);
1003
1004 /* Some keyboards don't work until their LEDs have been set.
1005 * Since BIOSes do set the LEDs, it must be safe for any device
1006 * that supports the keyboard boot protocol.
1007 */
1008 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1009 interface->desc.bInterfaceProtocol ==
1010 USB_INTERFACE_PROTOCOL_KEYBOARD)
1011 usbhid_set_leds(hid);
1012
1013 return 0;
1014
1015 fail:
1016 usb_free_urb(usbhid->urbin);
1017 usb_free_urb(usbhid->urbout);
1018 usb_free_urb(usbhid->urbctrl);
1019 usbhid->urbin = NULL;
1020 usbhid->urbout = NULL;
1021 usbhid->urbctrl = NULL;
1022 hid_free_buffers(dev, hid);
1023 return ret;
1024 }
1025
1026 static void usbhid_stop(struct hid_device *hid)
1027 {
1028 struct usbhid_device *usbhid = hid->driver_data;
1029
1030 if (WARN_ON(!usbhid))
1031 return;
1032
1033 clear_bit(HID_STARTED, &usbhid->iofl);
1034 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1035 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1036 spin_unlock_irq(&usbhid->lock);
1037 usb_kill_urb(usbhid->urbin);
1038 usb_kill_urb(usbhid->urbout);
1039 usb_kill_urb(usbhid->urbctrl);
1040
1041 hid_cancel_delayed_stuff(usbhid);
1042
1043 hid->claimed = 0;
1044
1045 usb_free_urb(usbhid->urbin);
1046 usb_free_urb(usbhid->urbctrl);
1047 usb_free_urb(usbhid->urbout);
1048 usbhid->urbin = NULL; /* don't mess up next start */
1049 usbhid->urbctrl = NULL;
1050 usbhid->urbout = NULL;
1051
1052 hid_free_buffers(hid_to_usb_dev(hid), hid);
1053 }
1054
1055 static int usbhid_power(struct hid_device *hid, int lvl)
1056 {
1057 int r = 0;
1058
1059 switch (lvl) {
1060 case PM_HINT_FULLON:
1061 r = usbhid_get_power(hid);
1062 break;
1063 case PM_HINT_NORMAL:
1064 usbhid_put_power(hid);
1065 break;
1066 }
1067 return r;
1068 }
1069
1070 static struct hid_ll_driver usb_hid_driver = {
1071 .parse = usbhid_parse,
1072 .start = usbhid_start,
1073 .stop = usbhid_stop,
1074 .open = usbhid_open,
1075 .close = usbhid_close,
1076 .power = usbhid_power,
1077 .hidinput_input_event = usb_hidinput_input_event,
1078 };
1079
1080 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1081 {
1082 struct usb_host_interface *interface = intf->cur_altsetting;
1083 struct usb_device *dev = interface_to_usbdev(intf);
1084 struct usbhid_device *usbhid;
1085 struct hid_device *hid;
1086 unsigned int n, has_in = 0;
1087 size_t len;
1088 int ret;
1089
1090 dbg_hid("HID probe called for ifnum %d\n",
1091 intf->altsetting->desc.bInterfaceNumber);
1092
1093 for (n = 0; n < interface->desc.bNumEndpoints; n++)
1094 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1095 has_in++;
1096 if (!has_in) {
1097 dev_err(&intf->dev, "couldn't find an input interrupt "
1098 "endpoint\n");
1099 return -ENODEV;
1100 }
1101
1102 hid = hid_allocate_device();
1103 if (IS_ERR(hid))
1104 return PTR_ERR(hid);
1105
1106 usb_set_intfdata(intf, hid);
1107 hid->ll_driver = &usb_hid_driver;
1108 hid->hid_output_raw_report = usbhid_output_raw_report;
1109 hid->ff_init = hid_pidff_init;
1110 #ifdef CONFIG_USB_HIDDEV
1111 hid->hiddev_connect = hiddev_connect;
1112 hid->hiddev_disconnect = hiddev_disconnect;
1113 hid->hiddev_hid_event = hiddev_hid_event;
1114 hid->hiddev_report_event = hiddev_report_event;
1115 #endif
1116 hid->dev.parent = &intf->dev;
1117 hid->bus = BUS_USB;
1118 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1119 hid->product = le16_to_cpu(dev->descriptor.idProduct);
1120 hid->name[0] = 0;
1121 if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1122 USB_INTERFACE_PROTOCOL_MOUSE)
1123 hid->type = HID_TYPE_USBMOUSE;
1124
1125 if (dev->manufacturer)
1126 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1127
1128 if (dev->product) {
1129 if (dev->manufacturer)
1130 strlcat(hid->name, " ", sizeof(hid->name));
1131 strlcat(hid->name, dev->product, sizeof(hid->name));
1132 }
1133
1134 if (!strlen(hid->name))
1135 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1136 le16_to_cpu(dev->descriptor.idVendor),
1137 le16_to_cpu(dev->descriptor.idProduct));
1138
1139 usb_make_path(dev, hid->phys, sizeof(hid->phys));
1140 strlcat(hid->phys, "/input", sizeof(hid->phys));
1141 len = strlen(hid->phys);
1142 if (len < sizeof(hid->phys) - 1)
1143 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1144 "%d", intf->altsetting[0].desc.bInterfaceNumber);
1145
1146 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1147 hid->uniq[0] = 0;
1148
1149 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1150 if (usbhid == NULL) {
1151 ret = -ENOMEM;
1152 goto err;
1153 }
1154
1155 hid->driver_data = usbhid;
1156 usbhid->hid = hid;
1157
1158 ret = hid_add_device(hid);
1159 if (ret) {
1160 if (ret != -ENODEV)
1161 dev_err(&intf->dev, "can't add hid device: %d\n", ret);
1162 goto err_free;
1163 }
1164
1165 return 0;
1166 err_free:
1167 kfree(usbhid);
1168 err:
1169 hid_destroy_device(hid);
1170 return ret;
1171 }
1172
1173 static void usbhid_disconnect(struct usb_interface *intf)
1174 {
1175 struct hid_device *hid = usb_get_intfdata(intf);
1176 struct usbhid_device *usbhid;
1177
1178 if (WARN_ON(!hid))
1179 return;
1180
1181 usbhid = hid->driver_data;
1182 hid_destroy_device(hid);
1183 kfree(usbhid);
1184 }
1185
1186 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1187 {
1188 del_timer_sync(&usbhid->io_retry);
1189 cancel_work_sync(&usbhid->restart_work);
1190 cancel_work_sync(&usbhid->reset_work);
1191 }
1192
1193 static void hid_cease_io(struct usbhid_device *usbhid)
1194 {
1195 del_timer(&usbhid->io_retry);
1196 usb_kill_urb(usbhid->urbin);
1197 usb_kill_urb(usbhid->urbctrl);
1198 usb_kill_urb(usbhid->urbout);
1199 }
1200
1201 /* Treat USB reset pretty much the same as suspend/resume */
1202 static int hid_pre_reset(struct usb_interface *intf)
1203 {
1204 struct hid_device *hid = usb_get_intfdata(intf);
1205 struct usbhid_device *usbhid = hid->driver_data;
1206
1207 spin_lock_irq(&usbhid->lock);
1208 set_bit(HID_RESET_PENDING, &usbhid->iofl);
1209 spin_unlock_irq(&usbhid->lock);
1210 cancel_work_sync(&usbhid->restart_work);
1211 hid_cease_io(usbhid);
1212
1213 return 0;
1214 }
1215
1216 /* Same routine used for post_reset and reset_resume */
1217 static int hid_post_reset(struct usb_interface *intf)
1218 {
1219 struct usb_device *dev = interface_to_usbdev (intf);
1220 struct hid_device *hid = usb_get_intfdata(intf);
1221 struct usbhid_device *usbhid = hid->driver_data;
1222 int status;
1223
1224 spin_lock_irq(&usbhid->lock);
1225 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1226 spin_unlock_irq(&usbhid->lock);
1227 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1228 status = hid_start_in(hid);
1229 if (status < 0)
1230 hid_io_error(hid);
1231 usbhid_restart_queues(usbhid);
1232
1233 return 0;
1234 }
1235
1236 int usbhid_get_power(struct hid_device *hid)
1237 {
1238 struct usbhid_device *usbhid = hid->driver_data;
1239
1240 return usb_autopm_get_interface(usbhid->intf);
1241 }
1242
1243 void usbhid_put_power(struct hid_device *hid)
1244 {
1245 struct usbhid_device *usbhid = hid->driver_data;
1246
1247 usb_autopm_put_interface(usbhid->intf);
1248 }
1249
1250
1251 #ifdef CONFIG_PM
1252 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1253 {
1254 struct hid_device *hid = usb_get_intfdata(intf);
1255 struct usbhid_device *usbhid = hid->driver_data;
1256 int status;
1257
1258 if (message.event & PM_EVENT_AUTO) {
1259 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1260 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1261 && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1262 && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1263 && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1264 && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1265 && (!usbhid->ledcount || ignoreled))
1266 {
1267 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1268 spin_unlock_irq(&usbhid->lock);
1269 } else {
1270 usbhid_mark_busy(usbhid);
1271 spin_unlock_irq(&usbhid->lock);
1272 return -EBUSY;
1273 }
1274
1275 } else {
1276 spin_lock_irq(&usbhid->lock);
1277 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1278 spin_unlock_irq(&usbhid->lock);
1279 if (usbhid_wait_io(hid) < 0)
1280 return -EIO;
1281 }
1282
1283 if (!ignoreled && (message.event & PM_EVENT_AUTO)) {
1284 spin_lock_irq(&usbhid->lock);
1285 if (test_bit(HID_LED_ON, &usbhid->iofl)) {
1286 spin_unlock_irq(&usbhid->lock);
1287 usbhid_mark_busy(usbhid);
1288 return -EBUSY;
1289 }
1290 spin_unlock_irq(&usbhid->lock);
1291 }
1292
1293 hid_cancel_delayed_stuff(usbhid);
1294 hid_cease_io(usbhid);
1295
1296 if ((message.event & PM_EVENT_AUTO) &&
1297 test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1298 /* lost race against keypresses */
1299 status = hid_start_in(hid);
1300 if (status < 0)
1301 hid_io_error(hid);
1302 usbhid_mark_busy(usbhid);
1303 return -EBUSY;
1304 }
1305 dev_dbg(&intf->dev, "suspend\n");
1306 return 0;
1307 }
1308
1309 static int hid_resume(struct usb_interface *intf)
1310 {
1311 struct hid_device *hid = usb_get_intfdata (intf);
1312 struct usbhid_device *usbhid = hid->driver_data;
1313 int status;
1314
1315 if (!test_bit(HID_STARTED, &usbhid->iofl))
1316 return 0;
1317
1318 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1319 usbhid_mark_busy(usbhid);
1320
1321 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1322 test_bit(HID_RESET_PENDING, &usbhid->iofl))
1323 schedule_work(&usbhid->reset_work);
1324 usbhid->retry_delay = 0;
1325 status = hid_start_in(hid);
1326 if (status < 0)
1327 hid_io_error(hid);
1328 usbhid_restart_queues(usbhid);
1329
1330 dev_dbg(&intf->dev, "resume status %d\n", status);
1331 return 0;
1332 }
1333
1334 static int hid_reset_resume(struct usb_interface *intf)
1335 {
1336 struct hid_device *hid = usb_get_intfdata(intf);
1337 struct usbhid_device *usbhid = hid->driver_data;
1338
1339 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1340 return hid_post_reset(intf);
1341 }
1342
1343 #endif /* CONFIG_PM */
1344
1345 static const struct usb_device_id hid_usb_ids[] = {
1346 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1347 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1348 { } /* Terminating entry */
1349 };
1350
1351 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1352
1353 static struct usb_driver hid_driver = {
1354 .name = "usbhid",
1355 .probe = usbhid_probe,
1356 .disconnect = usbhid_disconnect,
1357 #ifdef CONFIG_PM
1358 .suspend = hid_suspend,
1359 .resume = hid_resume,
1360 .reset_resume = hid_reset_resume,
1361 #endif
1362 .pre_reset = hid_pre_reset,
1363 .post_reset = hid_post_reset,
1364 .id_table = hid_usb_ids,
1365 .supports_autosuspend = 1,
1366 };
1367
1368 static const struct hid_device_id hid_usb_table[] = {
1369 { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1370 { }
1371 };
1372
1373 static struct hid_driver hid_usb_driver = {
1374 .name = "generic-usb",
1375 .id_table = hid_usb_table,
1376 };
1377
1378 static int __init hid_init(void)
1379 {
1380 int retval = -ENOMEM;
1381
1382 resumption_waker = create_freezeable_workqueue("usbhid_resumer");
1383 if (!resumption_waker)
1384 goto no_queue;
1385 retval = hid_register_driver(&hid_usb_driver);
1386 if (retval)
1387 goto hid_register_fail;
1388 retval = usbhid_quirks_init(quirks_param);
1389 if (retval)
1390 goto usbhid_quirks_init_fail;
1391 retval = hiddev_init();
1392 if (retval)
1393 goto hiddev_init_fail;
1394 retval = usb_register(&hid_driver);
1395 if (retval)
1396 goto usb_register_fail;
1397 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1398
1399 return 0;
1400 usb_register_fail:
1401 hiddev_exit();
1402 hiddev_init_fail:
1403 usbhid_quirks_exit();
1404 usbhid_quirks_init_fail:
1405 hid_unregister_driver(&hid_usb_driver);
1406 hid_register_fail:
1407 destroy_workqueue(resumption_waker);
1408 no_queue:
1409 return retval;
1410 }
1411
1412 static void __exit hid_exit(void)
1413 {
1414 usb_deregister(&hid_driver);
1415 hiddev_exit();
1416 usbhid_quirks_exit();
1417 hid_unregister_driver(&hid_usb_driver);
1418 destroy_workqueue(resumption_waker);
1419 }
1420
1421 module_init(hid_init);
1422 module_exit(hid_exit);
1423
1424 MODULE_AUTHOR("Andreas Gal");
1425 MODULE_AUTHOR("Vojtech Pavlik");
1426 MODULE_AUTHOR("Jiri Kosina");
1427 MODULE_DESCRIPTION(DRIVER_DESC);
1428 MODULE_LICENSE(DRIVER_LICENSE);
linux-next