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Merge branch 'mini2440-dev-unlikely' into mini2440-dev
[linux-2.6/mini2440.git] / drivers / hid / usbhid / hid-core.c
blob03bd703255a3d16311f8d6a50721c7c12ca4b4f0
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 } else {
322 /*
323 * queue work to wake up the device.
324 * as the work queue is freezeable, this is safe
325 * with respect to STD and STR
326 */
327 queue_work(resumption_waker, &usbhid->restart_work);
328 }
329
330 return 0;
331 }
332
333 static int hid_submit_ctrl(struct hid_device *hid)
334 {
335 struct hid_report *report;
336 unsigned char dir;
337 char *raw_report;
338 int len;
339 struct usbhid_device *usbhid = hid->driver_data;
340
341 report = usbhid->ctrl[usbhid->ctrltail].report;
342 raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
343 dir = usbhid->ctrl[usbhid->ctrltail].dir;
344
345 if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
346 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
347 if (dir == USB_DIR_OUT) {
348 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
349 usbhid->urbctrl->transfer_buffer_length = len;
350 memcpy(usbhid->ctrlbuf, raw_report, len);
351 kfree(raw_report);
352 } else {
353 int maxpacket, padlen;
354
355 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
356 maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
357 if (maxpacket > 0) {
358 padlen = DIV_ROUND_UP(len, maxpacket);
359 padlen *= maxpacket;
360 if (padlen > usbhid->bufsize)
361 padlen = usbhid->bufsize;
362 } else
363 padlen = 0;
364 usbhid->urbctrl->transfer_buffer_length = padlen;
365 }
366 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
367
368 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
369 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
370 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
371 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
372 usbhid->cr->wLength = cpu_to_le16(len);
373
374 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
375 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
376 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
377
378 if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
379 err_hid("usb_submit_urb(ctrl) failed");
380 return -1;
381 }
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 return;
521 }
522
523 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
524 dev_warn(&hid->dev, "control queue full\n");
525 return;
526 }
527
528 if (dir == USB_DIR_OUT) {
529 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC);
530 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
531 dev_warn(&hid->dev, "control queueing failed\n");
532 return;
533 }
534 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
535 }
536 usbhid->ctrl[usbhid->ctrlhead].report = report;
537 usbhid->ctrl[usbhid->ctrlhead].dir = dir;
538 usbhid->ctrlhead = head;
539
540 if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
541 if (hid_submit_ctrl(hid))
542 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
543 }
544
545 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
546 {
547 struct usbhid_device *usbhid = hid->driver_data;
548 unsigned long flags;
549
550 spin_lock_irqsave(&usbhid->lock, flags);
551 __usbhid_submit_report(hid, report, dir);
552 spin_unlock_irqrestore(&usbhid->lock, flags);
553 }
554 EXPORT_SYMBOL_GPL(usbhid_submit_report);
555
556 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
557 {
558 struct hid_device *hid = input_get_drvdata(dev);
559 struct usbhid_device *usbhid = hid->driver_data;
560 struct hid_field *field;
561 unsigned long flags;
562 int offset;
563
564 if (type == EV_FF)
565 return input_ff_event(dev, type, code, value);
566
567 if (type != EV_LED)
568 return -1;
569
570 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
571 dev_warn(&dev->dev, "event field not found\n");
572 return -1;
573 }
574
575 hid_set_field(field, offset, value);
576 if (value) {
577 spin_lock_irqsave(&usbhid->lock, flags);
578 usbhid->ledcount++;
579 spin_unlock_irqrestore(&usbhid->lock, flags);
580 } else {
581 spin_lock_irqsave(&usbhid->lock, flags);
582 usbhid->ledcount--;
583 spin_unlock_irqrestore(&usbhid->lock, flags);
584 }
585 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
586
587 return 0;
588 }
589
590 int usbhid_wait_io(struct hid_device *hid)
591 {
592 struct usbhid_device *usbhid = hid->driver_data;
593
594 if (!wait_event_timeout(usbhid->wait,
595 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
596 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
597 10*HZ)) {
598 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
599 return -1;
600 }
601
602 return 0;
603 }
604
605 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
606 {
607 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
608 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
609 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
610 }
611
612 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
613 unsigned char type, void *buf, int size)
614 {
615 int result, retries = 4;
616
617 memset(buf, 0, size);
618
619 do {
620 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
621 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
622 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
623 retries--;
624 } while (result < size && retries);
625 return result;
626 }
627
628 int usbhid_open(struct hid_device *hid)
629 {
630 struct usbhid_device *usbhid = hid->driver_data;
631 int res;
632
633 mutex_lock(&hid_open_mut);
634 if (!hid->open++) {
635 res = usb_autopm_get_interface(usbhid->intf);
636 /* the device must be awake to reliable request remote wakeup */
637 if (res < 0) {
638 hid->open--;
639 mutex_unlock(&hid_open_mut);
640 return -EIO;
641 }
642 usbhid->intf->needs_remote_wakeup = 1;
643 if (hid_start_in(hid))
644 hid_io_error(hid);
645
646 usb_autopm_put_interface(usbhid->intf);
647 }
648 mutex_unlock(&hid_open_mut);
649 return 0;
650 }
651
652 void usbhid_close(struct hid_device *hid)
653 {
654 struct usbhid_device *usbhid = hid->driver_data;
655
656 mutex_lock(&hid_open_mut);
657
658 /* protecting hid->open to make sure we don't restart
659 * data acquistion due to a resumption we no longer
660 * care about
661 */
662 spin_lock_irq(&usbhid->lock);
663 if (!--hid->open) {
664 spin_unlock_irq(&usbhid->lock);
665 hid_cancel_delayed_stuff(usbhid);
666 usb_kill_urb(usbhid->urbin);
667 usbhid->intf->needs_remote_wakeup = 0;
668 } else {
669 spin_unlock_irq(&usbhid->lock);
670 }
671 mutex_unlock(&hid_open_mut);
672 }
673
674 /*
675 * Initialize all reports
676 */
677
678 void usbhid_init_reports(struct hid_device *hid)
679 {
680 struct hid_report *report;
681 struct usbhid_device *usbhid = hid->driver_data;
682 int err, ret;
683
684 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
685 usbhid_submit_report(hid, report, USB_DIR_IN);
686
687 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
688 usbhid_submit_report(hid, report, USB_DIR_IN);
689
690 err = 0;
691 ret = usbhid_wait_io(hid);
692 while (ret) {
693 err |= ret;
694 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
695 usb_kill_urb(usbhid->urbctrl);
696 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
697 usb_kill_urb(usbhid->urbout);
698 ret = usbhid_wait_io(hid);
699 }
700
701 if (err)
702 dev_warn(&hid->dev, "timeout initializing reports\n");
703 }
704
705 /*
706 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
707 */
708 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
709 unsigned int hid_code, struct hid_field **pfield)
710 {
711 struct hid_report *report;
712 struct hid_field *field;
713 struct hid_usage *usage;
714 int i, j;
715
716 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
717 for (i = 0; i < report->maxfield; i++) {
718 field = report->field[i];
719 for (j = 0; j < field->maxusage; j++) {
720 usage = &field->usage[j];
721 if ((usage->hid & HID_USAGE_PAGE) == page &&
722 (usage->hid & 0xFFFF) == hid_code) {
723 *pfield = field;
724 return j;
725 }
726 }
727 }
728 }
729 return -1;
730 }
731
732 void usbhid_set_leds(struct hid_device *hid)
733 {
734 struct hid_field *field;
735 int offset;
736
737 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
738 hid_set_field(field, offset, 0);
739 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
740 }
741 }
742 EXPORT_SYMBOL_GPL(usbhid_set_leds);
743
744 /*
745 * Traverse the supplied list of reports and find the longest
746 */
747 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
748 unsigned int *max)
749 {
750 struct hid_report *report;
751 unsigned int size;
752
753 list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
754 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
755 if (*max < size)
756 *max = size;
757 }
758 }
759
760 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
761 {
762 struct usbhid_device *usbhid = hid->driver_data;
763
764 usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
765 &usbhid->inbuf_dma);
766 usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
767 &usbhid->outbuf_dma);
768 usbhid->cr = usb_buffer_alloc(dev, sizeof(*usbhid->cr), GFP_KERNEL,
769 &usbhid->cr_dma);
770 usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
771 &usbhid->ctrlbuf_dma);
772 if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
773 !usbhid->ctrlbuf)
774 return -1;
775
776 return 0;
777 }
778
779 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
780 {
781 struct usbhid_device *usbhid = hid->driver_data;
782 struct usb_device *dev = hid_to_usb_dev(hid);
783 struct usb_interface *intf = usbhid->intf;
784 struct usb_host_interface *interface = intf->cur_altsetting;
785 int ret;
786
787 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
788 HID_REQ_SET_REPORT,
789 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
790 ((HID_OUTPUT_REPORT + 1) << 8) | *buf,
791 interface->desc.bInterfaceNumber, buf + 1, count - 1,
792 USB_CTRL_SET_TIMEOUT);
793
794 /* count also the report id */
795 if (ret > 0)
796 ret++;
797
798 return ret;
799 }
800
801 static void usbhid_restart_queues(struct usbhid_device *usbhid)
802 {
803 if (usbhid->urbout)
804 usbhid_restart_out_queue(usbhid);
805 usbhid_restart_ctrl_queue(usbhid);
806 }
807
808 static void __usbhid_restart_queues(struct work_struct *work)
809 {
810 struct usbhid_device *usbhid =
811 container_of(work, struct usbhid_device, restart_work);
812 int r;
813
814 r = usb_autopm_get_interface(usbhid->intf);
815 if (r < 0)
816 return;
817 usb_autopm_put_interface(usbhid->intf);
818 }
819
820 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
821 {
822 struct usbhid_device *usbhid = hid->driver_data;
823
824 usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
825 usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
826 usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
827 usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
828 }
829
830 static int usbhid_parse(struct hid_device *hid)
831 {
832 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
833 struct usb_host_interface *interface = intf->cur_altsetting;
834 struct usb_device *dev = interface_to_usbdev (intf);
835 struct hid_descriptor *hdesc;
836 u32 quirks = 0;
837 unsigned int rsize = 0;
838 char *rdesc;
839 int ret, n;
840
841 quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
842 le16_to_cpu(dev->descriptor.idProduct));
843
844 if (quirks & HID_QUIRK_IGNORE)
845 return -ENODEV;
846
847 /* Many keyboards and mice don't like to be polled for reports,
848 * so we will always set the HID_QUIRK_NOGET flag for them. */
849 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
850 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
851 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
852 quirks |= HID_QUIRK_NOGET;
853 }
854
855 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
856 (!interface->desc.bNumEndpoints ||
857 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
858 dbg_hid("class descriptor not present\n");
859 return -ENODEV;
860 }
861
862 hid->version = le16_to_cpu(hdesc->bcdHID);
863 hid->country = hdesc->bCountryCode;
864
865 for (n = 0; n < hdesc->bNumDescriptors; n++)
866 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
867 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
868
869 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
870 dbg_hid("weird size of report descriptor (%u)\n", rsize);
871 return -EINVAL;
872 }
873
874 if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
875 dbg_hid("couldn't allocate rdesc memory\n");
876 return -ENOMEM;
877 }
878
879 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
880
881 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
882 HID_DT_REPORT, rdesc, rsize);
883 if (ret < 0) {
884 dbg_hid("reading report descriptor failed\n");
885 kfree(rdesc);
886 goto err;
887 }
888
889 ret = hid_parse_report(hid, rdesc, rsize);
890 kfree(rdesc);
891 if (ret) {
892 dbg_hid("parsing report descriptor failed\n");
893 goto err;
894 }
895
896 hid->quirks |= quirks;
897
898 return 0;
899 err:
900 return ret;
901 }
902
903 static int usbhid_start(struct hid_device *hid)
904 {
905 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
906 struct usb_host_interface *interface = intf->cur_altsetting;
907 struct usb_device *dev = interface_to_usbdev(intf);
908 struct usbhid_device *usbhid = hid->driver_data;
909 unsigned int n, insize = 0;
910 int ret;
911
912 clear_bit(HID_DISCONNECTED, &usbhid->iofl);
913
914 usbhid->bufsize = HID_MIN_BUFFER_SIZE;
915 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
916 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
917 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
918
919 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
920 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
921
922 hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
923
924 if (insize > HID_MAX_BUFFER_SIZE)
925 insize = HID_MAX_BUFFER_SIZE;
926
927 if (hid_alloc_buffers(dev, hid)) {
928 ret = -ENOMEM;
929 goto fail;
930 }
931
932 for (n = 0; n < interface->desc.bNumEndpoints; n++) {
933 struct usb_endpoint_descriptor *endpoint;
934 int pipe;
935 int interval;
936
937 endpoint = &interface->endpoint[n].desc;
938 if (!usb_endpoint_xfer_int(endpoint))
939 continue;
940
941 interval = endpoint->bInterval;
942
943 /* Some vendors give fullspeed interval on highspeed devides */
944 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
945 dev->speed == USB_SPEED_HIGH) {
946 interval = fls(endpoint->bInterval*8);
947 printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
948 hid->name, endpoint->bInterval, interval);
949 }
950
951 /* Change the polling interval of mice. */
952 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
953 interval = hid_mousepoll_interval;
954
955 ret = -ENOMEM;
956 if (usb_endpoint_dir_in(endpoint)) {
957 if (usbhid->urbin)
958 continue;
959 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
960 goto fail;
961 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
962 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
963 hid_irq_in, hid, interval);
964 usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
965 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
966 } else {
967 if (usbhid->urbout)
968 continue;
969 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
970 goto fail;
971 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
972 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
973 hid_irq_out, hid, interval);
974 usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
975 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
976 }
977 }
978
979 init_waitqueue_head(&usbhid->wait);
980 INIT_WORK(&usbhid->reset_work, hid_reset);
981 INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
982 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
983
984 spin_lock_init(&usbhid->lock);
985
986 usbhid->intf = intf;
987 usbhid->ifnum = interface->desc.bInterfaceNumber;
988
989 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
990 if (!usbhid->urbctrl) {
991 ret = -ENOMEM;
992 goto fail;
993 }
994
995 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
996 usbhid->ctrlbuf, 1, hid_ctrl, hid);
997 usbhid->urbctrl->setup_dma = usbhid->cr_dma;
998 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
999 usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
1000
1001 usbhid_init_reports(hid);
1002
1003 set_bit(HID_STARTED, &usbhid->iofl);
1004
1005 /* Some keyboards don't work until their LEDs have been set.
1006 * Since BIOSes do set the LEDs, it must be safe for any device
1007 * that supports the keyboard boot protocol.
1008 */
1009 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1010 interface->desc.bInterfaceProtocol ==
1011 USB_INTERFACE_PROTOCOL_KEYBOARD)
1012 usbhid_set_leds(hid);
1013
1014 return 0;
1015
1016 fail:
1017 usb_free_urb(usbhid->urbin);
1018 usb_free_urb(usbhid->urbout);
1019 usb_free_urb(usbhid->urbctrl);
1020 usbhid->urbin = NULL;
1021 usbhid->urbout = NULL;
1022 usbhid->urbctrl = NULL;
1023 hid_free_buffers(dev, hid);
1024 return ret;
1025 }
1026
1027 static void usbhid_stop(struct hid_device *hid)
1028 {
1029 struct usbhid_device *usbhid = hid->driver_data;
1030
1031 if (WARN_ON(!usbhid))
1032 return;
1033
1034 clear_bit(HID_STARTED, &usbhid->iofl);
1035 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1036 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1037 spin_unlock_irq(&usbhid->lock);
1038 usb_kill_urb(usbhid->urbin);
1039 usb_kill_urb(usbhid->urbout);
1040 usb_kill_urb(usbhid->urbctrl);
1041
1042 hid_cancel_delayed_stuff(usbhid);
1043
1044 hid->claimed = 0;
1045
1046 usb_free_urb(usbhid->urbin);
1047 usb_free_urb(usbhid->urbctrl);
1048 usb_free_urb(usbhid->urbout);
1049 usbhid->urbin = NULL; /* don't mess up next start */
1050 usbhid->urbctrl = NULL;
1051 usbhid->urbout = NULL;
1052
1053 hid_free_buffers(hid_to_usb_dev(hid), hid);
1054 }
1055
1056 static int usbhid_power(struct hid_device *hid, int lvl)
1057 {
1058 int r = 0;
1059
1060 switch (lvl) {
1061 case PM_HINT_FULLON:
1062 r = usbhid_get_power(hid);
1063 break;
1064 case PM_HINT_NORMAL:
1065 usbhid_put_power(hid);
1066 break;
1067 }
1068 return r;
1069 }
1070
1071 static struct hid_ll_driver usb_hid_driver = {
1072 .parse = usbhid_parse,
1073 .start = usbhid_start,
1074 .stop = usbhid_stop,
1075 .open = usbhid_open,
1076 .close = usbhid_close,
1077 .power = usbhid_power,
1078 .hidinput_input_event = usb_hidinput_input_event,
1079 };
1080
1081 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1082 {
1083 struct usb_host_interface *interface = intf->cur_altsetting;
1084 struct usb_device *dev = interface_to_usbdev(intf);
1085 struct usbhid_device *usbhid;
1086 struct hid_device *hid;
1087 unsigned int n, has_in = 0;
1088 size_t len;
1089 int ret;
1090
1091 dbg_hid("HID probe called for ifnum %d\n",
1092 intf->altsetting->desc.bInterfaceNumber);
1093
1094 for (n = 0; n < interface->desc.bNumEndpoints; n++)
1095 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1096 has_in++;
1097 if (!has_in) {
1098 dev_err(&intf->dev, "couldn't find an input interrupt "
1099 "endpoint\n");
1100 return -ENODEV;
1101 }
1102
1103 hid = hid_allocate_device();
1104 if (IS_ERR(hid))
1105 return PTR_ERR(hid);
1106
1107 usb_set_intfdata(intf, hid);
1108 hid->ll_driver = &usb_hid_driver;
1109 hid->hid_output_raw_report = usbhid_output_raw_report;
1110 hid->ff_init = hid_pidff_init;
1111 #ifdef CONFIG_USB_HIDDEV
1112 hid->hiddev_connect = hiddev_connect;
1113 hid->hiddev_disconnect = hiddev_disconnect;
1114 hid->hiddev_hid_event = hiddev_hid_event;
1115 hid->hiddev_report_event = hiddev_report_event;
1116 #endif
1117 hid->dev.parent = &intf->dev;
1118 hid->bus = BUS_USB;
1119 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1120 hid->product = le16_to_cpu(dev->descriptor.idProduct);
1121 hid->name[0] = 0;
1122 if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1123 USB_INTERFACE_PROTOCOL_MOUSE)
1124 hid->type = HID_TYPE_USBMOUSE;
1125
1126 if (dev->manufacturer)
1127 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1128
1129 if (dev->product) {
1130 if (dev->manufacturer)
1131 strlcat(hid->name, " ", sizeof(hid->name));
1132 strlcat(hid->name, dev->product, sizeof(hid->name));
1133 }
1134
1135 if (!strlen(hid->name))
1136 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1137 le16_to_cpu(dev->descriptor.idVendor),
1138 le16_to_cpu(dev->descriptor.idProduct));
1139
1140 usb_make_path(dev, hid->phys, sizeof(hid->phys));
1141 strlcat(hid->phys, "/input", sizeof(hid->phys));
1142 len = strlen(hid->phys);
1143 if (len < sizeof(hid->phys) - 1)
1144 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1145 "%d", intf->altsetting[0].desc.bInterfaceNumber);
1146
1147 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1148 hid->uniq[0] = 0;
1149
1150 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1151 if (usbhid == NULL) {
1152 ret = -ENOMEM;
1153 goto err;
1154 }
1155
1156 hid->driver_data = usbhid;
1157 usbhid->hid = hid;
1158
1159 ret = hid_add_device(hid);
1160 if (ret) {
1161 if (ret != -ENODEV)
1162 dev_err(&intf->dev, "can't add hid device: %d\n", ret);
1163 goto err_free;
1164 }
1165
1166 return 0;
1167 err_free:
1168 kfree(usbhid);
1169 err:
1170 hid_destroy_device(hid);
1171 return ret;
1172 }
1173
1174 static void usbhid_disconnect(struct usb_interface *intf)
1175 {
1176 struct hid_device *hid = usb_get_intfdata(intf);
1177 struct usbhid_device *usbhid;
1178
1179 if (WARN_ON(!hid))
1180 return;
1181
1182 usbhid = hid->driver_data;
1183 hid_destroy_device(hid);
1184 kfree(usbhid);
1185 }
1186
1187 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1188 {
1189 del_timer_sync(&usbhid->io_retry);
1190 cancel_work_sync(&usbhid->restart_work);
1191 cancel_work_sync(&usbhid->reset_work);
1192 }
1193
1194 static void hid_cease_io(struct usbhid_device *usbhid)
1195 {
1196 del_timer(&usbhid->io_retry);
1197 usb_kill_urb(usbhid->urbin);
1198 usb_kill_urb(usbhid->urbctrl);
1199 usb_kill_urb(usbhid->urbout);
1200 }
1201
1202 /* Treat USB reset pretty much the same as suspend/resume */
1203 static int hid_pre_reset(struct usb_interface *intf)
1204 {
1205 struct hid_device *hid = usb_get_intfdata(intf);
1206 struct usbhid_device *usbhid = hid->driver_data;
1207
1208 spin_lock_irq(&usbhid->lock);
1209 set_bit(HID_RESET_PENDING, &usbhid->iofl);
1210 spin_unlock_irq(&usbhid->lock);
1211 cancel_work_sync(&usbhid->restart_work);
1212 hid_cease_io(usbhid);
1213
1214 return 0;
1215 }
1216
1217 /* Same routine used for post_reset and reset_resume */
1218 static int hid_post_reset(struct usb_interface *intf)
1219 {
1220 struct usb_device *dev = interface_to_usbdev (intf);
1221 struct hid_device *hid = usb_get_intfdata(intf);
1222 struct usbhid_device *usbhid = hid->driver_data;
1223 int status;
1224
1225 spin_lock_irq(&usbhid->lock);
1226 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1227 spin_unlock_irq(&usbhid->lock);
1228 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1229 status = hid_start_in(hid);
1230 if (status < 0)
1231 hid_io_error(hid);
1232 usbhid_restart_queues(usbhid);
1233
1234 return 0;
1235 }
1236
1237 int usbhid_get_power(struct hid_device *hid)
1238 {
1239 struct usbhid_device *usbhid = hid->driver_data;
1240
1241 return usb_autopm_get_interface(usbhid->intf);
1242 }
1243
1244 void usbhid_put_power(struct hid_device *hid)
1245 {
1246 struct usbhid_device *usbhid = hid->driver_data;
1247
1248 usb_autopm_put_interface(usbhid->intf);
1249 }
1250
1251
1252 #ifdef CONFIG_PM
1253 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1254 {
1255 struct hid_device *hid = usb_get_intfdata(intf);
1256 struct usbhid_device *usbhid = hid->driver_data;
1257 struct usb_device *udev = interface_to_usbdev(intf);
1258 int status;
1259
1260 if (udev->auto_pm) {
1261 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1262 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1263 && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1264 && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1265 && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1266 && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1267 && (!usbhid->ledcount || ignoreled))
1268 {
1269 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1270 spin_unlock_irq(&usbhid->lock);
1271 } else {
1272 usbhid_mark_busy(usbhid);
1273 spin_unlock_irq(&usbhid->lock);
1274 return -EBUSY;
1275 }
1276
1277 } else {
1278 spin_lock_irq(&usbhid->lock);
1279 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1280 spin_unlock_irq(&usbhid->lock);
1281 if (usbhid_wait_io(hid) < 0)
1282 return -EIO;
1283 }
1284
1285 if (!ignoreled && udev->auto_pm) {
1286 spin_lock_irq(&usbhid->lock);
1287 if (test_bit(HID_LED_ON, &usbhid->iofl)) {
1288 spin_unlock_irq(&usbhid->lock);
1289 usbhid_mark_busy(usbhid);
1290 return -EBUSY;
1291 }
1292 spin_unlock_irq(&usbhid->lock);
1293 }
1294
1295 hid_cancel_delayed_stuff(usbhid);
1296 hid_cease_io(usbhid);
1297
1298 if (udev->auto_pm && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1299 /* lost race against keypresses */
1300 status = hid_start_in(hid);
1301 if (status < 0)
1302 hid_io_error(hid);
1303 usbhid_mark_busy(usbhid);
1304 return -EBUSY;
1305 }
1306 dev_dbg(&intf->dev, "suspend\n");
1307 return 0;
1308 }
1309
1310 static int hid_resume(struct usb_interface *intf)
1311 {
1312 struct hid_device *hid = usb_get_intfdata (intf);
1313 struct usbhid_device *usbhid = hid->driver_data;
1314 int status;
1315
1316 if (!test_bit(HID_STARTED, &usbhid->iofl))
1317 return 0;
1318
1319 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1320 usbhid_mark_busy(usbhid);
1321
1322 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1323 test_bit(HID_RESET_PENDING, &usbhid->iofl))
1324 schedule_work(&usbhid->reset_work);
1325 usbhid->retry_delay = 0;
1326 status = hid_start_in(hid);
1327 if (status < 0)
1328 hid_io_error(hid);
1329 usbhid_restart_queues(usbhid);
1330
1331 dev_dbg(&intf->dev, "resume status %d\n", status);
1332 return 0;
1333 }
1334
1335 static int hid_reset_resume(struct usb_interface *intf)
1336 {
1337 struct hid_device *hid = usb_get_intfdata(intf);
1338 struct usbhid_device *usbhid = hid->driver_data;
1339
1340 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1341 return hid_post_reset(intf);
1342 }
1343
1344 #endif /* CONFIG_PM */
1345
1346 static struct usb_device_id hid_usb_ids [] = {
1347 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1348 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1349 { } /* Terminating entry */
1350 };
1351
1352 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1353
1354 static struct usb_driver hid_driver = {
1355 .name = "usbhid",
1356 .probe = usbhid_probe,
1357 .disconnect = usbhid_disconnect,
1358 #ifdef CONFIG_PM
1359 .suspend = hid_suspend,
1360 .resume = hid_resume,
1361 .reset_resume = hid_reset_resume,
1362 #endif
1363 .pre_reset = hid_pre_reset,
1364 .post_reset = hid_post_reset,
1365 .id_table = hid_usb_ids,
1366 .supports_autosuspend = 1,
1367 };
1368
1369 static const struct hid_device_id hid_usb_table[] = {
1370 { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1371 { }
1372 };
1373
1374 static struct hid_driver hid_usb_driver = {
1375 .name = "generic-usb",
1376 .id_table = hid_usb_table,
1377 };
1378
1379 static int __init hid_init(void)
1380 {
1381 int retval = -ENOMEM;
1382
1383 resumption_waker = create_freezeable_workqueue("usbhid_resumer");
1384 if (!resumption_waker)
1385 goto no_queue;
1386 retval = hid_register_driver(&hid_usb_driver);
1387 if (retval)
1388 goto hid_register_fail;
1389 retval = usbhid_quirks_init(quirks_param);
1390 if (retval)
1391 goto usbhid_quirks_init_fail;
1392 retval = hiddev_init();
1393 if (retval)
1394 goto hiddev_init_fail;
1395 retval = usb_register(&hid_driver);
1396 if (retval)
1397 goto usb_register_fail;
1398 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1399 DRIVER_DESC "\n");
1400
1401 return 0;
1402 usb_register_fail:
1403 hiddev_exit();
1404 hiddev_init_fail:
1405 usbhid_quirks_exit();
1406 usbhid_quirks_init_fail:
1407 hid_unregister_driver(&hid_usb_driver);
1408 hid_register_fail:
1409 destroy_workqueue(resumption_waker);
1410 no_queue:
1411 return retval;
1412 }
1413
1414 static void __exit hid_exit(void)
1415 {
1416 usb_deregister(&hid_driver);
1417 hiddev_exit();
1418 usbhid_quirks_exit();
1419 hid_unregister_driver(&hid_usb_driver);
1420 destroy_workqueue(resumption_waker);
1421 }
1422
1423 module_init(hid_init);
1424 module_exit(hid_exit);
1425
1426 MODULE_AUTHOR(DRIVER_AUTHOR);
1427 MODULE_DESCRIPTION(DRIVER_DESC);
1428 MODULE_LICENSE(DRIVER_LICENSE);
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