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init from v2.6.32.60
[mach-moxart.git] / drivers / hid / usbhid / hid-core.c
blobe9add5b3481d570449d5c1c305dcb5a622f84a44
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) 2006-2009 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_VERSION "v2.6"
45 #define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik, Jiri Kosina"
46 #define DRIVER_DESC "USB HID core driver"
47 #define DRIVER_LICENSE "GPL"
48
49 /*
50 * Module parameters.
51 */
52
53 static unsigned int hid_mousepoll_interval;
54 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
55 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
56
57 static unsigned int ignoreled;
58 module_param_named(ignoreled, ignoreled, uint, 0644);
59 MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds");
60
61 /* Quirks specified at module load time */
62 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
63 module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
64 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
65 " quirks=vendorID:productID:quirks"
66 " where vendorID, productID, and quirks are all in"
67 " 0x-prefixed hex");
68 /*
69 * Input submission and I/O error handler.
70 */
71 static DEFINE_MUTEX(hid_open_mut);
72 static struct workqueue_struct *resumption_waker;
73
74 static void hid_io_error(struct hid_device *hid);
75 static int hid_submit_out(struct hid_device *hid);
76 static int hid_submit_ctrl(struct hid_device *hid);
77 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid);
78
79 /* Start up the input URB */
80 static int hid_start_in(struct hid_device *hid)
81 {
82 unsigned long flags;
83 int rc = 0;
84 struct usbhid_device *usbhid = hid->driver_data;
85
86 spin_lock_irqsave(&usbhid->lock, flags);
87 if (hid->open > 0 &&
88 !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
89 !test_bit(HID_REPORTED_IDLE, &usbhid->iofl) &&
90 !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
91 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
92 if (rc != 0)
93 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
94 }
95 spin_unlock_irqrestore(&usbhid->lock, flags);
96 return rc;
97 }
98
99 /* I/O retry timer routine */
100 static void hid_retry_timeout(unsigned long _hid)
101 {
102 struct hid_device *hid = (struct hid_device *) _hid;
103 struct usbhid_device *usbhid = hid->driver_data;
104
105 dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
106 if (hid_start_in(hid))
107 hid_io_error(hid);
108 }
109
110 /* Workqueue routine to reset the device or clear a halt */
111 static void hid_reset(struct work_struct *work)
112 {
113 struct usbhid_device *usbhid =
114 container_of(work, struct usbhid_device, reset_work);
115 struct hid_device *hid = usbhid->hid;
116 int rc = 0;
117
118 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
119 dev_dbg(&usbhid->intf->dev, "clear halt\n");
120 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
121 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
122 hid_start_in(hid);
123 }
124
125 else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
126 dev_dbg(&usbhid->intf->dev, "resetting device\n");
127 rc = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
128 if (rc == 0) {
129 rc = usb_reset_device(hid_to_usb_dev(hid));
130 usb_unlock_device(hid_to_usb_dev(hid));
131 }
132 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
133 }
134
135 switch (rc) {
136 case 0:
137 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
138 hid_io_error(hid);
139 break;
140 default:
141 err_hid("can't reset device, %s-%s/input%d, status %d",
142 hid_to_usb_dev(hid)->bus->bus_name,
143 hid_to_usb_dev(hid)->devpath,
144 usbhid->ifnum, rc);
145 /* FALLTHROUGH */
146 case -EHOSTUNREACH:
147 case -ENODEV:
148 case -EINTR:
149 break;
150 }
151 }
152
153 /* Main I/O error handler */
154 static void hid_io_error(struct hid_device *hid)
155 {
156 unsigned long flags;
157 struct usbhid_device *usbhid = hid->driver_data;
158
159 spin_lock_irqsave(&usbhid->lock, flags);
160
161 /* Stop when disconnected */
162 if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
163 goto done;
164
165 /* If it has been a while since the last error, we'll assume
166 * this a brand new error and reset the retry timeout. */
167 if (time_after(jiffies, usbhid->stop_retry + HZ/2))
168 usbhid->retry_delay = 0;
169
170 /* When an error occurs, retry at increasing intervals */
171 if (usbhid->retry_delay == 0) {
172 usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */
173 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
174 } else if (usbhid->retry_delay < 100)
175 usbhid->retry_delay *= 2;
176
177 if (time_after(jiffies, usbhid->stop_retry)) {
178
179 /* Retries failed, so do a port reset */
180 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
181 schedule_work(&usbhid->reset_work);
182 goto done;
183 }
184 }
185
186 mod_timer(&usbhid->io_retry,
187 jiffies + msecs_to_jiffies(usbhid->retry_delay));
188 done:
189 spin_unlock_irqrestore(&usbhid->lock, flags);
190 }
191
192 static void usbhid_mark_busy(struct usbhid_device *usbhid)
193 {
194 struct usb_interface *intf = usbhid->intf;
195
196 usb_mark_last_busy(interface_to_usbdev(intf));
197 }
198
199 static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
200 {
201 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
202 int kicked;
203
204 if (!hid)
205 return 0;
206
207 if ((kicked = (usbhid->outhead != usbhid->outtail))) {
208 dbg("Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
209 if (hid_submit_out(hid)) {
210 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
211 wake_up(&usbhid->wait);
212 }
213 }
214 return kicked;
215 }
216
217 static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
218 {
219 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
220 int kicked;
221
222 WARN_ON(hid == NULL);
223 if (!hid)
224 return 0;
225
226 if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
227 dbg("Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
228 if (hid_submit_ctrl(hid)) {
229 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
230 wake_up(&usbhid->wait);
231 }
232 }
233 return kicked;
234 }
235
236 /*
237 * Input interrupt completion handler.
238 */
239
240 static void hid_irq_in(struct urb *urb)
241 {
242 struct hid_device *hid = urb->context;
243 struct usbhid_device *usbhid = hid->driver_data;
244 int status;
245
246 switch (urb->status) {
247 case 0: /* success */
248 usbhid_mark_busy(usbhid);
249 usbhid->retry_delay = 0;
250 hid_input_report(urb->context, HID_INPUT_REPORT,
251 urb->transfer_buffer,
252 urb->actual_length, 1);
253 /*
254 * autosuspend refused while keys are pressed
255 * because most keyboards don't wake up when
256 * a key is released
257 */
258 if (hid_check_keys_pressed(hid))
259 set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
260 else
261 clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
262 break;
263 case -EPIPE: /* stall */
264 usbhid_mark_busy(usbhid);
265 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
266 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
267 schedule_work(&usbhid->reset_work);
268 return;
269 case -ECONNRESET: /* unlink */
270 case -ENOENT:
271 case -ESHUTDOWN: /* unplug */
272 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
273 return;
274 case -EILSEQ: /* protocol error or unplug */
275 case -EPROTO: /* protocol error or unplug */
276 case -ETIME: /* protocol error or unplug */
277 case -ETIMEDOUT: /* Should never happen, but... */
278 usbhid_mark_busy(usbhid);
279 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
280 hid_io_error(hid);
281 return;
282 default: /* error */
283 dev_warn(&urb->dev->dev, "input irq status %d "
284 "received\n", urb->status);
285 }
286
287 status = usb_submit_urb(urb, GFP_ATOMIC);
288 if (status) {
289 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
290 if (status != -EPERM) {
291 err_hid("can't resubmit intr, %s-%s/input%d, status %d",
292 hid_to_usb_dev(hid)->bus->bus_name,
293 hid_to_usb_dev(hid)->devpath,
294 usbhid->ifnum, status);
295 hid_io_error(hid);
296 }
297 }
298 }
299
300 static int hid_submit_out(struct hid_device *hid)
301 {
302 struct hid_report *report;
303 char *raw_report;
304 struct usbhid_device *usbhid = hid->driver_data;
305
306 report = usbhid->out[usbhid->outtail].report;
307 raw_report = usbhid->out[usbhid->outtail].raw_report;
308
309 if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
310 usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
311 usbhid->urbout->dev = hid_to_usb_dev(hid);
312 memcpy(usbhid->outbuf, raw_report, usbhid->urbout->transfer_buffer_length);
313 kfree(raw_report);
314
315 dbg_hid("submitting out urb\n");
316
317 if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
318 err_hid("usb_submit_urb(out) failed");
319 return -1;
320 }
321 usbhid->last_out = jiffies;
322 } else {
323 /*
324 * queue work to wake up the device.
325 * as the work queue is freezeable, this is safe
326 * with respect to STD and STR
327 */
328 queue_work(resumption_waker, &usbhid->restart_work);
329 }
330
331 return 0;
332 }
333
334 static int hid_submit_ctrl(struct hid_device *hid)
335 {
336 struct hid_report *report;
337 unsigned char dir;
338 char *raw_report;
339 int len;
340 struct usbhid_device *usbhid = hid->driver_data;
341
342 report = usbhid->ctrl[usbhid->ctrltail].report;
343 raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
344 dir = usbhid->ctrl[usbhid->ctrltail].dir;
345
346 if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
347 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
348 if (dir == USB_DIR_OUT) {
349 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
350 usbhid->urbctrl->transfer_buffer_length = len;
351 memcpy(usbhid->ctrlbuf, raw_report, len);
352 kfree(raw_report);
353 } else {
354 int maxpacket, padlen;
355
356 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
357 maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
358 if (maxpacket > 0) {
359 padlen = DIV_ROUND_UP(len, maxpacket);
360 padlen *= maxpacket;
361 if (padlen > usbhid->bufsize)
362 padlen = usbhid->bufsize;
363 } else
364 padlen = 0;
365 usbhid->urbctrl->transfer_buffer_length = padlen;
366 }
367 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
368
369 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
370 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
371 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
372 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
373 usbhid->cr->wLength = cpu_to_le16(len);
374
375 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
376 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
377 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
378
379 if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
380 err_hid("usb_submit_urb(ctrl) failed");
381 return -1;
382 }
383 usbhid->last_ctrl = jiffies;
384 } else {
385 /*
386 * queue work to wake up the device.
387 * as the work queue is freezeable, this is safe
388 * with respect to STD and STR
389 */
390 queue_work(resumption_waker, &usbhid->restart_work);
391 }
392
393 return 0;
394 }
395
396 /*
397 * Output interrupt completion handler.
398 */
399
400 static void hid_irq_out(struct urb *urb)
401 {
402 struct hid_device *hid = urb->context;
403 struct usbhid_device *usbhid = hid->driver_data;
404 unsigned long flags;
405 int unplug = 0;
406
407 switch (urb->status) {
408 case 0: /* success */
409 break;
410 case -ESHUTDOWN: /* unplug */
411 unplug = 1;
412 case -EILSEQ: /* protocol error or unplug */
413 case -EPROTO: /* protocol error or unplug */
414 case -ECONNRESET: /* unlink */
415 case -ENOENT:
416 break;
417 default: /* error */
418 dev_warn(&urb->dev->dev, "output irq status %d "
419 "received\n", urb->status);
420 }
421
422 spin_lock_irqsave(&usbhid->lock, flags);
423
424 if (unplug)
425 usbhid->outtail = usbhid->outhead;
426 else
427 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
428
429 if (usbhid->outhead != usbhid->outtail) {
430 if (hid_submit_out(hid)) {
431 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
432 wake_up(&usbhid->wait);
433 }
434 spin_unlock_irqrestore(&usbhid->lock, flags);
435 return;
436 }
437
438 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
439 spin_unlock_irqrestore(&usbhid->lock, flags);
440 wake_up(&usbhid->wait);
441 }
442
443 /*
444 * Control pipe completion handler.
445 */
446
447 static void hid_ctrl(struct urb *urb)
448 {
449 struct hid_device *hid = urb->context;
450 struct usbhid_device *usbhid = hid->driver_data;
451 int unplug = 0, status = urb->status;
452
453 spin_lock(&usbhid->lock);
454
455 switch (status) {
456 case 0: /* success */
457 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
458 hid_input_report(urb->context,
459 usbhid->ctrl[usbhid->ctrltail].report->type,
460 urb->transfer_buffer, urb->actual_length, 0);
461 break;
462 case -ESHUTDOWN: /* unplug */
463 unplug = 1;
464 case -EILSEQ: /* protocol error or unplug */
465 case -EPROTO: /* protocol error or unplug */
466 case -ECONNRESET: /* unlink */
467 case -ENOENT:
468 case -EPIPE: /* report not available */
469 break;
470 default: /* error */
471 dev_warn(&urb->dev->dev, "ctrl urb status %d "
472 "received\n", status);
473 }
474
475 if (unplug)
476 usbhid->ctrltail = usbhid->ctrlhead;
477 else
478 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
479
480 if (usbhid->ctrlhead != usbhid->ctrltail) {
481 if (hid_submit_ctrl(hid)) {
482 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
483 wake_up(&usbhid->wait);
484 }
485 spin_unlock(&usbhid->lock);
486 return;
487 }
488
489 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
490 spin_unlock(&usbhid->lock);
491 wake_up(&usbhid->wait);
492 }
493
494 static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
495 unsigned char dir)
496 {
497 int head;
498 struct usbhid_device *usbhid = hid->driver_data;
499 int len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
500
501 if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
502 return;
503
504 if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
505 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
506 dev_warn(&hid->dev, "output queue full\n");
507 return;
508 }
509
510 usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC);
511 if (!usbhid->out[usbhid->outhead].raw_report) {
512 dev_warn(&hid->dev, "output queueing failed\n");
513 return;
514 }
515 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
516 usbhid->out[usbhid->outhead].report = report;
517 usbhid->outhead = head;
518
519 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl)) {
520 if (hid_submit_out(hid))
521 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
522 } else {
523 /*
524 * the queue is known to run
525 * but an earlier request may be stuck
526 * we may need to time out
527 * no race because this is called under
528 * spinlock
529 */
530 if (time_after(jiffies, usbhid->last_out + HZ * 5))
531 usb_unlink_urb(usbhid->urbout);
532 }
533 return;
534 }
535
536 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
537 dev_warn(&hid->dev, "control queue full\n");
538 return;
539 }
540
541 if (dir == USB_DIR_OUT) {
542 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC);
543 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
544 dev_warn(&hid->dev, "control queueing failed\n");
545 return;
546 }
547 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
548 }
549 usbhid->ctrl[usbhid->ctrlhead].report = report;
550 usbhid->ctrl[usbhid->ctrlhead].dir = dir;
551 usbhid->ctrlhead = head;
552
553 if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl)) {
554 if (hid_submit_ctrl(hid))
555 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
556 } else {
557 /*
558 * the queue is known to run
559 * but an earlier request may be stuck
560 * we may need to time out
561 * no race because this is called under
562 * spinlock
563 */
564 if (time_after(jiffies, usbhid->last_ctrl + HZ * 5))
565 usb_unlink_urb(usbhid->urbctrl);
566 }
567 }
568
569 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
570 {
571 struct usbhid_device *usbhid = hid->driver_data;
572 unsigned long flags;
573
574 spin_lock_irqsave(&usbhid->lock, flags);
575 __usbhid_submit_report(hid, report, dir);
576 spin_unlock_irqrestore(&usbhid->lock, flags);
577 }
578 EXPORT_SYMBOL_GPL(usbhid_submit_report);
579
580 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
581 {
582 struct hid_device *hid = input_get_drvdata(dev);
583 struct usbhid_device *usbhid = hid->driver_data;
584 struct hid_field *field;
585 unsigned long flags;
586 int offset;
587
588 if (type == EV_FF)
589 return input_ff_event(dev, type, code, value);
590
591 if (type != EV_LED)
592 return -1;
593
594 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
595 dev_warn(&dev->dev, "event field not found\n");
596 return -1;
597 }
598
599 hid_set_field(field, offset, value);
600 if (value) {
601 spin_lock_irqsave(&usbhid->lock, flags);
602 usbhid->ledcount++;
603 spin_unlock_irqrestore(&usbhid->lock, flags);
604 } else {
605 spin_lock_irqsave(&usbhid->lock, flags);
606 usbhid->ledcount--;
607 spin_unlock_irqrestore(&usbhid->lock, flags);
608 }
609 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
610
611 return 0;
612 }
613
614 int usbhid_wait_io(struct hid_device *hid)
615 {
616 struct usbhid_device *usbhid = hid->driver_data;
617
618 if (!wait_event_timeout(usbhid->wait,
619 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
620 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
621 10*HZ)) {
622 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
623 return -1;
624 }
625
626 return 0;
627 }
628
629 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
630 {
631 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
632 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
633 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
634 }
635
636 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
637 unsigned char type, void *buf, int size)
638 {
639 int result, retries = 4;
640
641 memset(buf, 0, size);
642
643 do {
644 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
645 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
646 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
647 retries--;
648 } while (result < size && retries);
649 return result;
650 }
651
652 int usbhid_open(struct hid_device *hid)
653 {
654 struct usbhid_device *usbhid = hid->driver_data;
655 int res;
656
657 mutex_lock(&hid_open_mut);
658 if (!hid->open++) {
659 res = usb_autopm_get_interface(usbhid->intf);
660 /* the device must be awake to reliable request remote wakeup */
661 if (res < 0) {
662 hid->open--;
663 mutex_unlock(&hid_open_mut);
664 return -EIO;
665 }
666 usbhid->intf->needs_remote_wakeup = 1;
667 if (hid_start_in(hid))
668 hid_io_error(hid);
669
670 usb_autopm_put_interface(usbhid->intf);
671 }
672 mutex_unlock(&hid_open_mut);
673 return 0;
674 }
675
676 void usbhid_close(struct hid_device *hid)
677 {
678 struct usbhid_device *usbhid = hid->driver_data;
679
680 mutex_lock(&hid_open_mut);
681
682 /* protecting hid->open to make sure we don't restart
683 * data acquistion due to a resumption we no longer
684 * care about
685 */
686 spin_lock_irq(&usbhid->lock);
687 if (!--hid->open) {
688 spin_unlock_irq(&usbhid->lock);
689 hid_cancel_delayed_stuff(usbhid);
690 usb_kill_urb(usbhid->urbin);
691 usbhid->intf->needs_remote_wakeup = 0;
692 } else {
693 spin_unlock_irq(&usbhid->lock);
694 }
695 mutex_unlock(&hid_open_mut);
696 }
697
698 /*
699 * Initialize all reports
700 */
701
702 void usbhid_init_reports(struct hid_device *hid)
703 {
704 struct hid_report *report;
705 struct usbhid_device *usbhid = hid->driver_data;
706 int err, ret;
707
708 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
709 usbhid_submit_report(hid, report, USB_DIR_IN);
710
711 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
712 usbhid_submit_report(hid, report, USB_DIR_IN);
713
714 err = 0;
715 ret = usbhid_wait_io(hid);
716 while (ret) {
717 err |= ret;
718 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
719 usb_kill_urb(usbhid->urbctrl);
720 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
721 usb_kill_urb(usbhid->urbout);
722 ret = usbhid_wait_io(hid);
723 }
724
725 if (err)
726 dev_warn(&hid->dev, "timeout initializing reports\n");
727 }
728
729 /*
730 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
731 */
732 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
733 unsigned int hid_code, struct hid_field **pfield)
734 {
735 struct hid_report *report;
736 struct hid_field *field;
737 struct hid_usage *usage;
738 int i, j;
739
740 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
741 for (i = 0; i < report->maxfield; i++) {
742 field = report->field[i];
743 for (j = 0; j < field->maxusage; j++) {
744 usage = &field->usage[j];
745 if ((usage->hid & HID_USAGE_PAGE) == page &&
746 (usage->hid & 0xFFFF) == hid_code) {
747 *pfield = field;
748 return j;
749 }
750 }
751 }
752 }
753 return -1;
754 }
755
756 void usbhid_set_leds(struct hid_device *hid)
757 {
758 struct hid_field *field;
759 int offset;
760
761 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
762 hid_set_field(field, offset, 0);
763 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
764 }
765 }
766 EXPORT_SYMBOL_GPL(usbhid_set_leds);
767
768 /*
769 * Traverse the supplied list of reports and find the longest
770 */
771 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
772 unsigned int *max)
773 {
774 struct hid_report *report;
775 unsigned int size;
776
777 list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
778 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
779 if (*max < size)
780 *max = size;
781 }
782 }
783
784 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
785 {
786 struct usbhid_device *usbhid = hid->driver_data;
787
788 usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
789 &usbhid->inbuf_dma);
790 usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
791 &usbhid->outbuf_dma);
792 usbhid->cr = usb_buffer_alloc(dev, sizeof(*usbhid->cr), GFP_KERNEL,
793 &usbhid->cr_dma);
794 usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
795 &usbhid->ctrlbuf_dma);
796 if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
797 !usbhid->ctrlbuf)
798 return -1;
799
800 return 0;
801 }
802
803 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
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 ((HID_OUTPUT_REPORT + 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 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
1004 if (!usbhid->urbctrl) {
1005 ret = -ENOMEM;
1006 goto fail;
1007 }
1008
1009 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
1010 usbhid->ctrlbuf, 1, hid_ctrl, hid);
1011 usbhid->urbctrl->setup_dma = usbhid->cr_dma;
1012 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
1013 usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
1014
1015 if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS))
1016 usbhid_init_reports(hid);
1017
1018 set_bit(HID_STARTED, &usbhid->iofl);
1019
1020 /* Some keyboards don't work until their LEDs have been set.
1021 * Since BIOSes do set the LEDs, it must be safe for any device
1022 * that supports the keyboard boot protocol.
1023 */
1024 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1025 interface->desc.bInterfaceProtocol ==
1026 USB_INTERFACE_PROTOCOL_KEYBOARD)
1027 usbhid_set_leds(hid);
1028
1029 return 0;
1030
1031 fail:
1032 usb_free_urb(usbhid->urbin);
1033 usb_free_urb(usbhid->urbout);
1034 usb_free_urb(usbhid->urbctrl);
1035 usbhid->urbin = NULL;
1036 usbhid->urbout = NULL;
1037 usbhid->urbctrl = NULL;
1038 hid_free_buffers(dev, hid);
1039 return ret;
1040 }
1041
1042 static void usbhid_stop(struct hid_device *hid)
1043 {
1044 struct usbhid_device *usbhid = hid->driver_data;
1045
1046 if (WARN_ON(!usbhid))
1047 return;
1048
1049 clear_bit(HID_STARTED, &usbhid->iofl);
1050 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1051 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1052 spin_unlock_irq(&usbhid->lock);
1053 usb_kill_urb(usbhid->urbin);
1054 usb_kill_urb(usbhid->urbout);
1055 usb_kill_urb(usbhid->urbctrl);
1056
1057 hid_cancel_delayed_stuff(usbhid);
1058
1059 hid->claimed = 0;
1060
1061 usb_free_urb(usbhid->urbin);
1062 usb_free_urb(usbhid->urbctrl);
1063 usb_free_urb(usbhid->urbout);
1064 usbhid->urbin = NULL; /* don't mess up next start */
1065 usbhid->urbctrl = NULL;
1066 usbhid->urbout = NULL;
1067
1068 hid_free_buffers(hid_to_usb_dev(hid), hid);
1069 }
1070
1071 static int usbhid_power(struct hid_device *hid, int lvl)
1072 {
1073 int r = 0;
1074
1075 switch (lvl) {
1076 case PM_HINT_FULLON:
1077 r = usbhid_get_power(hid);
1078 break;
1079 case PM_HINT_NORMAL:
1080 usbhid_put_power(hid);
1081 break;
1082 }
1083 return r;
1084 }
1085
1086 static struct hid_ll_driver usb_hid_driver = {
1087 .parse = usbhid_parse,
1088 .start = usbhid_start,
1089 .stop = usbhid_stop,
1090 .open = usbhid_open,
1091 .close = usbhid_close,
1092 .power = usbhid_power,
1093 .hidinput_input_event = usb_hidinput_input_event,
1094 };
1095
1096 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1097 {
1098 struct usb_host_interface *interface = intf->cur_altsetting;
1099 struct usb_device *dev = interface_to_usbdev(intf);
1100 struct usbhid_device *usbhid;
1101 struct hid_device *hid;
1102 unsigned int n, has_in = 0;
1103 size_t len;
1104 int ret;
1105
1106 dbg_hid("HID probe called for ifnum %d\n",
1107 intf->altsetting->desc.bInterfaceNumber);
1108
1109 for (n = 0; n < interface->desc.bNumEndpoints; n++)
1110 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1111 has_in++;
1112 if (!has_in) {
1113 dev_err(&intf->dev, "couldn't find an input interrupt "
1114 "endpoint\n");
1115 return -ENODEV;
1116 }
1117
1118 hid = hid_allocate_device();
1119 if (IS_ERR(hid))
1120 return PTR_ERR(hid);
1121
1122 usb_set_intfdata(intf, hid);
1123 hid->ll_driver = &usb_hid_driver;
1124 hid->hid_output_raw_report = usbhid_output_raw_report;
1125 hid->ff_init = hid_pidff_init;
1126 #ifdef CONFIG_USB_HIDDEV
1127 hid->hiddev_connect = hiddev_connect;
1128 hid->hiddev_disconnect = hiddev_disconnect;
1129 hid->hiddev_hid_event = hiddev_hid_event;
1130 hid->hiddev_report_event = hiddev_report_event;
1131 #endif
1132 hid->dev.parent = &intf->dev;
1133 hid->bus = BUS_USB;
1134 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1135 hid->product = le16_to_cpu(dev->descriptor.idProduct);
1136 hid->name[0] = 0;
1137 if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1138 USB_INTERFACE_PROTOCOL_MOUSE)
1139 hid->type = HID_TYPE_USBMOUSE;
1140
1141 if (dev->manufacturer)
1142 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1143
1144 if (dev->product) {
1145 if (dev->manufacturer)
1146 strlcat(hid->name, " ", sizeof(hid->name));
1147 strlcat(hid->name, dev->product, sizeof(hid->name));
1148 }
1149
1150 if (!strlen(hid->name))
1151 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1152 le16_to_cpu(dev->descriptor.idVendor),
1153 le16_to_cpu(dev->descriptor.idProduct));
1154
1155 usb_make_path(dev, hid->phys, sizeof(hid->phys));
1156 strlcat(hid->phys, "/input", sizeof(hid->phys));
1157 len = strlen(hid->phys);
1158 if (len < sizeof(hid->phys) - 1)
1159 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1160 "%d", intf->altsetting[0].desc.bInterfaceNumber);
1161
1162 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1163 hid->uniq[0] = 0;
1164
1165 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1166 if (usbhid == NULL) {
1167 ret = -ENOMEM;
1168 goto err;
1169 }
1170
1171 hid->driver_data = usbhid;
1172 usbhid->hid = hid;
1173 usbhid->intf = intf;
1174 usbhid->ifnum = interface->desc.bInterfaceNumber;
1175
1176 init_waitqueue_head(&usbhid->wait);
1177 INIT_WORK(&usbhid->reset_work, hid_reset);
1178 INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
1179 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
1180 spin_lock_init(&usbhid->lock);
1181
1182 ret = hid_add_device(hid);
1183 if (ret) {
1184 if (ret != -ENODEV)
1185 dev_err(&intf->dev, "can't add hid device: %d\n", ret);
1186 goto err_free;
1187 }
1188
1189 return 0;
1190 err_free:
1191 kfree(usbhid);
1192 err:
1193 hid_destroy_device(hid);
1194 return ret;
1195 }
1196
1197 static void usbhid_disconnect(struct usb_interface *intf)
1198 {
1199 struct hid_device *hid = usb_get_intfdata(intf);
1200 struct usbhid_device *usbhid;
1201
1202 if (WARN_ON(!hid))
1203 return;
1204
1205 usbhid = hid->driver_data;
1206 hid_destroy_device(hid);
1207 kfree(usbhid);
1208 }
1209
1210 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1211 {
1212 del_timer_sync(&usbhid->io_retry);
1213 cancel_work_sync(&usbhid->restart_work);
1214 cancel_work_sync(&usbhid->reset_work);
1215 }
1216
1217 static void hid_cease_io(struct usbhid_device *usbhid)
1218 {
1219 del_timer(&usbhid->io_retry);
1220 usb_kill_urb(usbhid->urbin);
1221 usb_kill_urb(usbhid->urbctrl);
1222 usb_kill_urb(usbhid->urbout);
1223 }
1224
1225 /* Treat USB reset pretty much the same as suspend/resume */
1226 static int hid_pre_reset(struct usb_interface *intf)
1227 {
1228 struct hid_device *hid = usb_get_intfdata(intf);
1229 struct usbhid_device *usbhid = hid->driver_data;
1230
1231 spin_lock_irq(&usbhid->lock);
1232 set_bit(HID_RESET_PENDING, &usbhid->iofl);
1233 spin_unlock_irq(&usbhid->lock);
1234 cancel_work_sync(&usbhid->restart_work);
1235 hid_cease_io(usbhid);
1236
1237 return 0;
1238 }
1239
1240 /* Same routine used for post_reset and reset_resume */
1241 static int hid_post_reset(struct usb_interface *intf)
1242 {
1243 struct usb_device *dev = interface_to_usbdev (intf);
1244 struct hid_device *hid = usb_get_intfdata(intf);
1245 struct usbhid_device *usbhid = hid->driver_data;
1246 int status;
1247
1248 spin_lock_irq(&usbhid->lock);
1249 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1250 spin_unlock_irq(&usbhid->lock);
1251 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1252 status = hid_start_in(hid);
1253 if (status < 0)
1254 hid_io_error(hid);
1255 usbhid_restart_queues(usbhid);
1256
1257 return 0;
1258 }
1259
1260 int usbhid_get_power(struct hid_device *hid)
1261 {
1262 struct usbhid_device *usbhid = hid->driver_data;
1263
1264 return usb_autopm_get_interface(usbhid->intf);
1265 }
1266
1267 void usbhid_put_power(struct hid_device *hid)
1268 {
1269 struct usbhid_device *usbhid = hid->driver_data;
1270
1271 usb_autopm_put_interface(usbhid->intf);
1272 }
1273
1274
1275 #ifdef CONFIG_PM
1276 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1277 {
1278 struct hid_device *hid = usb_get_intfdata(intf);
1279 struct usbhid_device *usbhid = hid->driver_data;
1280 struct usb_device *udev = interface_to_usbdev(intf);
1281 int status;
1282
1283 if (udev->auto_pm) {
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 } else {
1295 usbhid_mark_busy(usbhid);
1296 spin_unlock_irq(&usbhid->lock);
1297 return -EBUSY;
1298 }
1299
1300 } else {
1301 spin_lock_irq(&usbhid->lock);
1302 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1303 spin_unlock_irq(&usbhid->lock);
1304 if (usbhid_wait_io(hid) < 0)
1305 return -EIO;
1306 }
1307
1308 if (!ignoreled && udev->auto_pm) {
1309 spin_lock_irq(&usbhid->lock);
1310 if (test_bit(HID_LED_ON, &usbhid->iofl)) {
1311 spin_unlock_irq(&usbhid->lock);
1312 usbhid_mark_busy(usbhid);
1313 return -EBUSY;
1314 }
1315 spin_unlock_irq(&usbhid->lock);
1316 }
1317
1318 hid_cancel_delayed_stuff(usbhid);
1319 hid_cease_io(usbhid);
1320
1321 if (udev->auto_pm && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1322 /* lost race against keypresses */
1323 status = hid_start_in(hid);
1324 if (status < 0)
1325 hid_io_error(hid);
1326 usbhid_mark_busy(usbhid);
1327 return -EBUSY;
1328 }
1329 dev_dbg(&intf->dev, "suspend\n");
1330 return 0;
1331 }
1332
1333 static int hid_resume(struct usb_interface *intf)
1334 {
1335 struct hid_device *hid = usb_get_intfdata (intf);
1336 struct usbhid_device *usbhid = hid->driver_data;
1337 int status;
1338
1339 if (!test_bit(HID_STARTED, &usbhid->iofl))
1340 return 0;
1341
1342 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1343 usbhid_mark_busy(usbhid);
1344
1345 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1346 test_bit(HID_RESET_PENDING, &usbhid->iofl))
1347 schedule_work(&usbhid->reset_work);
1348 usbhid->retry_delay = 0;
1349 status = hid_start_in(hid);
1350 if (status < 0)
1351 hid_io_error(hid);
1352 usbhid_restart_queues(usbhid);
1353
1354 dev_dbg(&intf->dev, "resume status %d\n", status);
1355 return 0;
1356 }
1357
1358 static int hid_reset_resume(struct usb_interface *intf)
1359 {
1360 struct hid_device *hid = usb_get_intfdata(intf);
1361 struct usbhid_device *usbhid = hid->driver_data;
1362
1363 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1364 return hid_post_reset(intf);
1365 }
1366
1367 #endif /* CONFIG_PM */
1368
1369 static struct usb_device_id hid_usb_ids [] = {
1370 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1371 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1372 { } /* Terminating entry */
1373 };
1374
1375 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1376
1377 static struct usb_driver hid_driver = {
1378 .name = "usbhid",
1379 .probe = usbhid_probe,
1380 .disconnect = usbhid_disconnect,
1381 #ifdef CONFIG_PM
1382 .suspend = hid_suspend,
1383 .resume = hid_resume,
1384 .reset_resume = hid_reset_resume,
1385 #endif
1386 .pre_reset = hid_pre_reset,
1387 .post_reset = hid_post_reset,
1388 .id_table = hid_usb_ids,
1389 .supports_autosuspend = 1,
1390 };
1391
1392 static const struct hid_device_id hid_usb_table[] = {
1393 { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1394 { }
1395 };
1396
1397 static struct hid_driver hid_usb_driver = {
1398 .name = "generic-usb",
1399 .id_table = hid_usb_table,
1400 };
1401
1402 static int __init hid_init(void)
1403 {
1404 int retval = -ENOMEM;
1405
1406 resumption_waker = create_freezeable_workqueue("usbhid_resumer");
1407 if (!resumption_waker)
1408 goto no_queue;
1409 retval = hid_register_driver(&hid_usb_driver);
1410 if (retval)
1411 goto hid_register_fail;
1412 retval = usbhid_quirks_init(quirks_param);
1413 if (retval)
1414 goto usbhid_quirks_init_fail;
1415 retval = hiddev_init();
1416 if (retval)
1417 goto hiddev_init_fail;
1418 retval = usb_register(&hid_driver);
1419 if (retval)
1420 goto usb_register_fail;
1421 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1422 DRIVER_DESC "\n");
1423
1424 return 0;
1425 usb_register_fail:
1426 hiddev_exit();
1427 hiddev_init_fail:
1428 usbhid_quirks_exit();
1429 usbhid_quirks_init_fail:
1430 hid_unregister_driver(&hid_usb_driver);
1431 hid_register_fail:
1432 destroy_workqueue(resumption_waker);
1433 no_queue:
1434 return retval;
1435 }
1436
1437 static void __exit hid_exit(void)
1438 {
1439 usb_deregister(&hid_driver);
1440 hiddev_exit();
1441 usbhid_quirks_exit();
1442 hid_unregister_driver(&hid_usb_driver);
1443 destroy_workqueue(resumption_waker);
1444 }
1445
1446 module_init(hid_init);
1447 module_exit(hid_exit);
1448
1449 MODULE_AUTHOR(DRIVER_AUTHOR);
1450 MODULE_DESCRIPTION(DRIVER_DESC);
1451 MODULE_LICENSE(DRIVER_LICENSE);
Linux MOXA ART SoC ARM port