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Merge branch 'for-2638/i2c/ocores' into for-linus/i2c-2638
[deliverable/linux.git] / drivers / hid / usbhid / hid-core.c
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
71 static void hid_io_error(struct hid_device *hid);
72 static int hid_submit_out(struct hid_device *hid);
73 static int hid_submit_ctrl(struct hid_device *hid);
74 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid);
75
76 /* Start up the input URB */
77 static int hid_start_in(struct hid_device *hid)
78 {
79 unsigned long flags;
80 int rc = 0;
81 struct usbhid_device *usbhid = hid->driver_data;
82
83 spin_lock_irqsave(&usbhid->lock, flags);
84 if (hid->open > 0 &&
85 !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
86 !test_bit(HID_REPORTED_IDLE, &usbhid->iofl) &&
87 !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
88 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
89 if (rc != 0)
90 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
91 }
92 spin_unlock_irqrestore(&usbhid->lock, flags);
93 return rc;
94 }
95
96 /* I/O retry timer routine */
97 static void hid_retry_timeout(unsigned long _hid)
98 {
99 struct hid_device *hid = (struct hid_device *) _hid;
100 struct usbhid_device *usbhid = hid->driver_data;
101
102 dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
103 if (hid_start_in(hid))
104 hid_io_error(hid);
105 }
106
107 /* Workqueue routine to reset the device or clear a halt */
108 static void hid_reset(struct work_struct *work)
109 {
110 struct usbhid_device *usbhid =
111 container_of(work, struct usbhid_device, reset_work);
112 struct hid_device *hid = usbhid->hid;
113 int rc = 0;
114
115 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
116 dev_dbg(&usbhid->intf->dev, "clear halt\n");
117 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
118 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
119 hid_start_in(hid);
120 }
121
122 else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
123 dev_dbg(&usbhid->intf->dev, "resetting device\n");
124 rc = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
125 if (rc == 0) {
126 rc = usb_reset_device(hid_to_usb_dev(hid));
127 usb_unlock_device(hid_to_usb_dev(hid));
128 }
129 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
130 }
131
132 switch (rc) {
133 case 0:
134 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
135 hid_io_error(hid);
136 break;
137 default:
138 hid_err(hid, "can't reset device, %s-%s/input%d, status %d\n",
139 hid_to_usb_dev(hid)->bus->bus_name,
140 hid_to_usb_dev(hid)->devpath,
141 usbhid->ifnum, rc);
142 /* FALLTHROUGH */
143 case -EHOSTUNREACH:
144 case -ENODEV:
145 case -EINTR:
146 break;
147 }
148 }
149
150 /* Main I/O error handler */
151 static void hid_io_error(struct hid_device *hid)
152 {
153 unsigned long flags;
154 struct usbhid_device *usbhid = hid->driver_data;
155
156 spin_lock_irqsave(&usbhid->lock, flags);
157
158 /* Stop when disconnected */
159 if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
160 goto done;
161
162 /* If it has been a while since the last error, we'll assume
163 * this a brand new error and reset the retry timeout. */
164 if (time_after(jiffies, usbhid->stop_retry + HZ/2))
165 usbhid->retry_delay = 0;
166
167 /* When an error occurs, retry at increasing intervals */
168 if (usbhid->retry_delay == 0) {
169 usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */
170 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
171 } else if (usbhid->retry_delay < 100)
172 usbhid->retry_delay *= 2;
173
174 if (time_after(jiffies, usbhid->stop_retry)) {
175
176 /* Retries failed, so do a port reset */
177 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
178 schedule_work(&usbhid->reset_work);
179 goto done;
180 }
181 }
182
183 mod_timer(&usbhid->io_retry,
184 jiffies + msecs_to_jiffies(usbhid->retry_delay));
185 done:
186 spin_unlock_irqrestore(&usbhid->lock, flags);
187 }
188
189 static void usbhid_mark_busy(struct usbhid_device *usbhid)
190 {
191 struct usb_interface *intf = usbhid->intf;
192
193 usb_mark_last_busy(interface_to_usbdev(intf));
194 }
195
196 static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
197 {
198 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
199 int kicked;
200
201 if (!hid)
202 return 0;
203
204 if ((kicked = (usbhid->outhead != usbhid->outtail))) {
205 dbg("Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
206 if (hid_submit_out(hid)) {
207 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
208 wake_up(&usbhid->wait);
209 }
210 }
211 return kicked;
212 }
213
214 static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
215 {
216 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
217 int kicked;
218
219 WARN_ON(hid == NULL);
220 if (!hid)
221 return 0;
222
223 if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
224 dbg("Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
225 if (hid_submit_ctrl(hid)) {
226 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
227 wake_up(&usbhid->wait);
228 }
229 }
230 return kicked;
231 }
232
233 /*
234 * Input interrupt completion handler.
235 */
236
237 static void hid_irq_in(struct urb *urb)
238 {
239 struct hid_device *hid = urb->context;
240 struct usbhid_device *usbhid = hid->driver_data;
241 int status;
242
243 switch (urb->status) {
244 case 0: /* success */
245 usbhid_mark_busy(usbhid);
246 usbhid->retry_delay = 0;
247 hid_input_report(urb->context, HID_INPUT_REPORT,
248 urb->transfer_buffer,
249 urb->actual_length, 1);
250 /*
251 * autosuspend refused while keys are pressed
252 * because most keyboards don't wake up when
253 * a key is released
254 */
255 if (hid_check_keys_pressed(hid))
256 set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
257 else
258 clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
259 break;
260 case -EPIPE: /* stall */
261 usbhid_mark_busy(usbhid);
262 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
263 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
264 schedule_work(&usbhid->reset_work);
265 return;
266 case -ECONNRESET: /* unlink */
267 case -ENOENT:
268 case -ESHUTDOWN: /* unplug */
269 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
270 return;
271 case -EILSEQ: /* protocol error or unplug */
272 case -EPROTO: /* protocol error or unplug */
273 case -ETIME: /* protocol error or unplug */
274 case -ETIMEDOUT: /* Should never happen, but... */
275 usbhid_mark_busy(usbhid);
276 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
277 hid_io_error(hid);
278 return;
279 default: /* error */
280 hid_warn(urb->dev, "input irq status %d received\n",
281 urb->status);
282 }
283
284 status = usb_submit_urb(urb, GFP_ATOMIC);
285 if (status) {
286 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
287 if (status != -EPERM) {
288 hid_err(hid, "can't resubmit intr, %s-%s/input%d, status %d\n",
289 hid_to_usb_dev(hid)->bus->bus_name,
290 hid_to_usb_dev(hid)->devpath,
291 usbhid->ifnum, status);
292 hid_io_error(hid);
293 }
294 }
295 }
296
297 static int hid_submit_out(struct hid_device *hid)
298 {
299 struct hid_report *report;
300 char *raw_report;
301 struct usbhid_device *usbhid = hid->driver_data;
302 int r;
303
304 report = usbhid->out[usbhid->outtail].report;
305 raw_report = usbhid->out[usbhid->outtail].raw_report;
306
307 r = usb_autopm_get_interface_async(usbhid->intf);
308 if (r < 0)
309 return -1;
310
311 /*
312 * if the device hasn't been woken, we leave the output
313 * to resume()
314 */
315 if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
316 usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
317 usbhid->urbout->dev = hid_to_usb_dev(hid);
318 memcpy(usbhid->outbuf, raw_report, usbhid->urbout->transfer_buffer_length);
319 kfree(raw_report);
320
321 dbg_hid("submitting out urb\n");
322
323 if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
324 hid_err(hid, "usb_submit_urb(out) failed\n");
325 usb_autopm_put_interface_async(usbhid->intf);
326 return -1;
327 }
328 usbhid->last_out = jiffies;
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, r;
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 r = usb_autopm_get_interface_async(usbhid->intf);
347 if (r < 0)
348 return -1;
349 if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
350 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
351 if (dir == USB_DIR_OUT) {
352 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
353 usbhid->urbctrl->transfer_buffer_length = len;
354 memcpy(usbhid->ctrlbuf, raw_report, len);
355 kfree(raw_report);
356 } else {
357 int maxpacket, padlen;
358
359 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
360 maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
361 if (maxpacket > 0) {
362 padlen = DIV_ROUND_UP(len, maxpacket);
363 padlen *= maxpacket;
364 if (padlen > usbhid->bufsize)
365 padlen = usbhid->bufsize;
366 } else
367 padlen = 0;
368 usbhid->urbctrl->transfer_buffer_length = padlen;
369 }
370 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
371
372 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
373 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
374 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
375 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
376 usbhid->cr->wLength = cpu_to_le16(len);
377
378 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
379 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
380 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
381
382 if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
383 usb_autopm_put_interface_async(usbhid->intf);
384 hid_err(hid, "usb_submit_urb(ctrl) failed\n");
385 return -1;
386 }
387 usbhid->last_ctrl = jiffies;
388 }
389
390 return 0;
391 }
392
393 /*
394 * Output interrupt completion handler.
395 */
396
397 static void hid_irq_out(struct urb *urb)
398 {
399 struct hid_device *hid = urb->context;
400 struct usbhid_device *usbhid = hid->driver_data;
401 unsigned long flags;
402 int unplug = 0;
403
404 switch (urb->status) {
405 case 0: /* success */
406 break;
407 case -ESHUTDOWN: /* unplug */
408 unplug = 1;
409 case -EILSEQ: /* protocol error or unplug */
410 case -EPROTO: /* protocol error or unplug */
411 case -ECONNRESET: /* unlink */
412 case -ENOENT:
413 break;
414 default: /* error */
415 hid_warn(urb->dev, "output irq status %d received\n",
416 urb->status);
417 }
418
419 spin_lock_irqsave(&usbhid->lock, flags);
420
421 if (unplug)
422 usbhid->outtail = usbhid->outhead;
423 else
424 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
425
426 if (usbhid->outhead != usbhid->outtail) {
427 if (hid_submit_out(hid)) {
428 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
429 wake_up(&usbhid->wait);
430 }
431 spin_unlock_irqrestore(&usbhid->lock, flags);
432 return;
433 }
434
435 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
436 spin_unlock_irqrestore(&usbhid->lock, flags);
437 usb_autopm_put_interface_async(usbhid->intf);
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 hid_warn(urb->dev, "ctrl urb status %d received\n", status);
470 }
471
472 if (unplug)
473 usbhid->ctrltail = usbhid->ctrlhead;
474 else
475 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
476
477 if (usbhid->ctrlhead != usbhid->ctrltail) {
478 if (hid_submit_ctrl(hid)) {
479 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
480 wake_up(&usbhid->wait);
481 }
482 spin_unlock(&usbhid->lock);
483 usb_autopm_put_interface_async(usbhid->intf);
484 return;
485 }
486
487 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
488 spin_unlock(&usbhid->lock);
489 usb_autopm_put_interface_async(usbhid->intf);
490 wake_up(&usbhid->wait);
491 }
492
493 static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
494 unsigned char dir)
495 {
496 int head;
497 struct usbhid_device *usbhid = hid->driver_data;
498 int len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
499
500 if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
501 return;
502
503 if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
504 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
505 hid_warn(hid, "output queue full\n");
506 return;
507 }
508
509 usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC);
510 if (!usbhid->out[usbhid->outhead].raw_report) {
511 hid_warn(hid, "output queueing failed\n");
512 return;
513 }
514 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
515 usbhid->out[usbhid->outhead].report = report;
516 usbhid->outhead = head;
517
518 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl)) {
519 if (hid_submit_out(hid))
520 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
521 } else {
522 /*
523 * the queue is known to run
524 * but an earlier request may be stuck
525 * we may need to time out
526 * no race because this is called under
527 * spinlock
528 */
529 if (time_after(jiffies, usbhid->last_out + HZ * 5))
530 usb_unlink_urb(usbhid->urbout);
531 }
532 return;
533 }
534
535 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
536 hid_warn(hid, "control queue full\n");
537 return;
538 }
539
540 if (dir == USB_DIR_OUT) {
541 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC);
542 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
543 hid_warn(hid, "control queueing failed\n");
544 return;
545 }
546 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
547 }
548 usbhid->ctrl[usbhid->ctrlhead].report = report;
549 usbhid->ctrl[usbhid->ctrlhead].dir = dir;
550 usbhid->ctrlhead = head;
551
552 if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl)) {
553 if (hid_submit_ctrl(hid))
554 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
555 } else {
556 /*
557 * the queue is known to run
558 * but an earlier request may be stuck
559 * we may need to time out
560 * no race because this is called under
561 * spinlock
562 */
563 if (time_after(jiffies, usbhid->last_ctrl + HZ * 5))
564 usb_unlink_urb(usbhid->urbctrl);
565 }
566 }
567
568 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
569 {
570 struct usbhid_device *usbhid = hid->driver_data;
571 unsigned long flags;
572
573 spin_lock_irqsave(&usbhid->lock, flags);
574 __usbhid_submit_report(hid, report, dir);
575 spin_unlock_irqrestore(&usbhid->lock, flags);
576 }
577 EXPORT_SYMBOL_GPL(usbhid_submit_report);
578
579 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
580 {
581 struct hid_device *hid = input_get_drvdata(dev);
582 struct usbhid_device *usbhid = hid->driver_data;
583 struct hid_field *field;
584 unsigned long flags;
585 int offset;
586
587 if (type == EV_FF)
588 return input_ff_event(dev, type, code, value);
589
590 if (type != EV_LED)
591 return -1;
592
593 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
594 hid_warn(dev, "event field not found\n");
595 return -1;
596 }
597
598 hid_set_field(field, offset, value);
599 if (value) {
600 spin_lock_irqsave(&usbhid->lock, flags);
601 usbhid->ledcount++;
602 spin_unlock_irqrestore(&usbhid->lock, flags);
603 } else {
604 spin_lock_irqsave(&usbhid->lock, flags);
605 usbhid->ledcount--;
606 spin_unlock_irqrestore(&usbhid->lock, flags);
607 }
608 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
609
610 return 0;
611 }
612
613 int usbhid_wait_io(struct hid_device *hid)
614 {
615 struct usbhid_device *usbhid = hid->driver_data;
616
617 if (!wait_event_timeout(usbhid->wait,
618 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
619 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
620 10*HZ)) {
621 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
622 return -1;
623 }
624
625 return 0;
626 }
627 EXPORT_SYMBOL_GPL(usbhid_wait_io);
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 reliably 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 hid_warn(hid, "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_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
789 &usbhid->inbuf_dma);
790 usbhid->outbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
791 &usbhid->outbuf_dma);
792 usbhid->cr = kmalloc(sizeof(*usbhid->cr), GFP_KERNEL);
793 usbhid->ctrlbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
794 &usbhid->ctrlbuf_dma);
795 if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
796 !usbhid->ctrlbuf)
797 return -1;
798
799 return 0;
800 }
801
802 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count,
803 unsigned char report_type)
804 {
805 struct usbhid_device *usbhid = hid->driver_data;
806 struct usb_device *dev = hid_to_usb_dev(hid);
807 struct usb_interface *intf = usbhid->intf;
808 struct usb_host_interface *interface = intf->cur_altsetting;
809 int ret;
810
811 if (usbhid->urbout && report_type != HID_FEATURE_REPORT) {
812 int actual_length;
813 int skipped_report_id = 0;
814
815 if (buf[0] == 0x0) {
816 /* Don't send the Report ID */
817 buf++;
818 count--;
819 skipped_report_id = 1;
820 }
821 ret = usb_interrupt_msg(dev, usbhid->urbout->pipe,
822 buf, count, &actual_length,
823 USB_CTRL_SET_TIMEOUT);
824 /* return the number of bytes transferred */
825 if (ret == 0) {
826 ret = actual_length;
827 /* count also the report id */
828 if (skipped_report_id)
829 ret++;
830 }
831 } else {
832 int skipped_report_id = 0;
833 int report_id = buf[0];
834 if (buf[0] == 0x0) {
835 /* Don't send the Report ID */
836 buf++;
837 count--;
838 skipped_report_id = 1;
839 }
840 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
841 HID_REQ_SET_REPORT,
842 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
843 ((report_type + 1) << 8) | report_id,
844 interface->desc.bInterfaceNumber, buf, count,
845 USB_CTRL_SET_TIMEOUT);
846 /* count also the report id, if this was a numbered report. */
847 if (ret > 0 && skipped_report_id)
848 ret++;
849 }
850
851 return ret;
852 }
853
854 static void usbhid_restart_queues(struct usbhid_device *usbhid)
855 {
856 if (usbhid->urbout)
857 usbhid_restart_out_queue(usbhid);
858 usbhid_restart_ctrl_queue(usbhid);
859 }
860
861 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
862 {
863 struct usbhid_device *usbhid = hid->driver_data;
864
865 usb_free_coherent(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
866 usb_free_coherent(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
867 kfree(usbhid->cr);
868 usb_free_coherent(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
869 }
870
871 static int usbhid_parse(struct hid_device *hid)
872 {
873 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
874 struct usb_host_interface *interface = intf->cur_altsetting;
875 struct usb_device *dev = interface_to_usbdev (intf);
876 struct hid_descriptor *hdesc;
877 u32 quirks = 0;
878 unsigned int rsize = 0;
879 char *rdesc;
880 int ret, n;
881
882 quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
883 le16_to_cpu(dev->descriptor.idProduct));
884
885 if (quirks & HID_QUIRK_IGNORE)
886 return -ENODEV;
887
888 /* Many keyboards and mice don't like to be polled for reports,
889 * so we will always set the HID_QUIRK_NOGET flag for them. */
890 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
891 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
892 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
893 quirks |= HID_QUIRK_NOGET;
894 }
895
896 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
897 (!interface->desc.bNumEndpoints ||
898 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
899 dbg_hid("class descriptor not present\n");
900 return -ENODEV;
901 }
902
903 hid->version = le16_to_cpu(hdesc->bcdHID);
904 hid->country = hdesc->bCountryCode;
905
906 for (n = 0; n < hdesc->bNumDescriptors; n++)
907 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
908 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
909
910 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
911 dbg_hid("weird size of report descriptor (%u)\n", rsize);
912 return -EINVAL;
913 }
914
915 if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
916 dbg_hid("couldn't allocate rdesc memory\n");
917 return -ENOMEM;
918 }
919
920 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
921
922 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
923 HID_DT_REPORT, rdesc, rsize);
924 if (ret < 0) {
925 dbg_hid("reading report descriptor failed\n");
926 kfree(rdesc);
927 goto err;
928 }
929
930 ret = hid_parse_report(hid, rdesc, rsize);
931 kfree(rdesc);
932 if (ret) {
933 dbg_hid("parsing report descriptor failed\n");
934 goto err;
935 }
936
937 hid->quirks |= quirks;
938
939 return 0;
940 err:
941 return ret;
942 }
943
944 static int usbhid_start(struct hid_device *hid)
945 {
946 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
947 struct usb_host_interface *interface = intf->cur_altsetting;
948 struct usb_device *dev = interface_to_usbdev(intf);
949 struct usbhid_device *usbhid = hid->driver_data;
950 unsigned int n, insize = 0;
951 int ret;
952
953 clear_bit(HID_DISCONNECTED, &usbhid->iofl);
954
955 usbhid->bufsize = HID_MIN_BUFFER_SIZE;
956 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
957 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
958 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
959
960 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
961 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
962
963 hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
964
965 if (insize > HID_MAX_BUFFER_SIZE)
966 insize = HID_MAX_BUFFER_SIZE;
967
968 if (hid_alloc_buffers(dev, hid)) {
969 ret = -ENOMEM;
970 goto fail;
971 }
972
973 for (n = 0; n < interface->desc.bNumEndpoints; n++) {
974 struct usb_endpoint_descriptor *endpoint;
975 int pipe;
976 int interval;
977
978 endpoint = &interface->endpoint[n].desc;
979 if (!usb_endpoint_xfer_int(endpoint))
980 continue;
981
982 interval = endpoint->bInterval;
983
984 /* Some vendors give fullspeed interval on highspeed devides */
985 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
986 dev->speed == USB_SPEED_HIGH) {
987 interval = fls(endpoint->bInterval*8);
988 printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
989 hid->name, endpoint->bInterval, interval);
990 }
991
992 /* Change the polling interval of mice. */
993 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
994 interval = hid_mousepoll_interval;
995
996 ret = -ENOMEM;
997 if (usb_endpoint_dir_in(endpoint)) {
998 if (usbhid->urbin)
999 continue;
1000 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
1001 goto fail;
1002 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
1003 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
1004 hid_irq_in, hid, interval);
1005 usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
1006 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1007 } else {
1008 if (usbhid->urbout)
1009 continue;
1010 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
1011 goto fail;
1012 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
1013 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
1014 hid_irq_out, hid, interval);
1015 usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
1016 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1017 }
1018 }
1019
1020 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
1021 if (!usbhid->urbctrl) {
1022 ret = -ENOMEM;
1023 goto fail;
1024 }
1025
1026 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
1027 usbhid->ctrlbuf, 1, hid_ctrl, hid);
1028 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
1029 usbhid->urbctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1030
1031 if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS))
1032 usbhid_init_reports(hid);
1033
1034 set_bit(HID_STARTED, &usbhid->iofl);
1035
1036 /* Some keyboards don't work until their LEDs have been set.
1037 * Since BIOSes do set the LEDs, it must be safe for any device
1038 * that supports the keyboard boot protocol.
1039 * In addition, enable remote wakeup by default for all keyboard
1040 * devices supporting the boot protocol.
1041 */
1042 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1043 interface->desc.bInterfaceProtocol ==
1044 USB_INTERFACE_PROTOCOL_KEYBOARD) {
1045 usbhid_set_leds(hid);
1046 device_set_wakeup_enable(&dev->dev, 1);
1047 }
1048 return 0;
1049
1050 fail:
1051 usb_free_urb(usbhid->urbin);
1052 usb_free_urb(usbhid->urbout);
1053 usb_free_urb(usbhid->urbctrl);
1054 usbhid->urbin = NULL;
1055 usbhid->urbout = NULL;
1056 usbhid->urbctrl = NULL;
1057 hid_free_buffers(dev, hid);
1058 return ret;
1059 }
1060
1061 static void usbhid_stop(struct hid_device *hid)
1062 {
1063 struct usbhid_device *usbhid = hid->driver_data;
1064
1065 if (WARN_ON(!usbhid))
1066 return;
1067
1068 clear_bit(HID_STARTED, &usbhid->iofl);
1069 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1070 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1071 spin_unlock_irq(&usbhid->lock);
1072 usb_kill_urb(usbhid->urbin);
1073 usb_kill_urb(usbhid->urbout);
1074 usb_kill_urb(usbhid->urbctrl);
1075
1076 hid_cancel_delayed_stuff(usbhid);
1077
1078 hid->claimed = 0;
1079
1080 usb_free_urb(usbhid->urbin);
1081 usb_free_urb(usbhid->urbctrl);
1082 usb_free_urb(usbhid->urbout);
1083 usbhid->urbin = NULL; /* don't mess up next start */
1084 usbhid->urbctrl = NULL;
1085 usbhid->urbout = NULL;
1086
1087 hid_free_buffers(hid_to_usb_dev(hid), hid);
1088 }
1089
1090 static int usbhid_power(struct hid_device *hid, int lvl)
1091 {
1092 int r = 0;
1093
1094 switch (lvl) {
1095 case PM_HINT_FULLON:
1096 r = usbhid_get_power(hid);
1097 break;
1098 case PM_HINT_NORMAL:
1099 usbhid_put_power(hid);
1100 break;
1101 }
1102 return r;
1103 }
1104
1105 static struct hid_ll_driver usb_hid_driver = {
1106 .parse = usbhid_parse,
1107 .start = usbhid_start,
1108 .stop = usbhid_stop,
1109 .open = usbhid_open,
1110 .close = usbhid_close,
1111 .power = usbhid_power,
1112 .hidinput_input_event = usb_hidinput_input_event,
1113 };
1114
1115 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1116 {
1117 struct usb_host_interface *interface = intf->cur_altsetting;
1118 struct usb_device *dev = interface_to_usbdev(intf);
1119 struct usbhid_device *usbhid;
1120 struct hid_device *hid;
1121 unsigned int n, has_in = 0;
1122 size_t len;
1123 int ret;
1124
1125 dbg_hid("HID probe called for ifnum %d\n",
1126 intf->altsetting->desc.bInterfaceNumber);
1127
1128 for (n = 0; n < interface->desc.bNumEndpoints; n++)
1129 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1130 has_in++;
1131 if (!has_in) {
1132 hid_err(intf, "couldn't find an input interrupt endpoint\n");
1133 return -ENODEV;
1134 }
1135
1136 hid = hid_allocate_device();
1137 if (IS_ERR(hid))
1138 return PTR_ERR(hid);
1139
1140 usb_set_intfdata(intf, hid);
1141 hid->ll_driver = &usb_hid_driver;
1142 hid->hid_output_raw_report = usbhid_output_raw_report;
1143 hid->ff_init = hid_pidff_init;
1144 #ifdef CONFIG_USB_HIDDEV
1145 hid->hiddev_connect = hiddev_connect;
1146 hid->hiddev_disconnect = hiddev_disconnect;
1147 hid->hiddev_hid_event = hiddev_hid_event;
1148 hid->hiddev_report_event = hiddev_report_event;
1149 #endif
1150 hid->dev.parent = &intf->dev;
1151 hid->bus = BUS_USB;
1152 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1153 hid->product = le16_to_cpu(dev->descriptor.idProduct);
1154 hid->name[0] = 0;
1155 hid->quirks = usbhid_lookup_quirk(hid->vendor, hid->product);
1156 if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1157 USB_INTERFACE_PROTOCOL_MOUSE)
1158 hid->type = HID_TYPE_USBMOUSE;
1159
1160 if (dev->manufacturer)
1161 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1162
1163 if (dev->product) {
1164 if (dev->manufacturer)
1165 strlcat(hid->name, " ", sizeof(hid->name));
1166 strlcat(hid->name, dev->product, sizeof(hid->name));
1167 }
1168
1169 if (!strlen(hid->name))
1170 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1171 le16_to_cpu(dev->descriptor.idVendor),
1172 le16_to_cpu(dev->descriptor.idProduct));
1173
1174 usb_make_path(dev, hid->phys, sizeof(hid->phys));
1175 strlcat(hid->phys, "/input", sizeof(hid->phys));
1176 len = strlen(hid->phys);
1177 if (len < sizeof(hid->phys) - 1)
1178 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1179 "%d", intf->altsetting[0].desc.bInterfaceNumber);
1180
1181 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1182 hid->uniq[0] = 0;
1183
1184 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1185 if (usbhid == NULL) {
1186 ret = -ENOMEM;
1187 goto err;
1188 }
1189
1190 hid->driver_data = usbhid;
1191 usbhid->hid = hid;
1192 usbhid->intf = intf;
1193 usbhid->ifnum = interface->desc.bInterfaceNumber;
1194
1195 init_waitqueue_head(&usbhid->wait);
1196 INIT_WORK(&usbhid->reset_work, hid_reset);
1197 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
1198 spin_lock_init(&usbhid->lock);
1199
1200 ret = hid_add_device(hid);
1201 if (ret) {
1202 if (ret != -ENODEV)
1203 hid_err(intf, "can't add hid device: %d\n", ret);
1204 goto err_free;
1205 }
1206
1207 return 0;
1208 err_free:
1209 kfree(usbhid);
1210 err:
1211 hid_destroy_device(hid);
1212 return ret;
1213 }
1214
1215 static void usbhid_disconnect(struct usb_interface *intf)
1216 {
1217 struct hid_device *hid = usb_get_intfdata(intf);
1218 struct usbhid_device *usbhid;
1219
1220 if (WARN_ON(!hid))
1221 return;
1222
1223 usbhid = hid->driver_data;
1224 hid_destroy_device(hid);
1225 kfree(usbhid);
1226 }
1227
1228 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1229 {
1230 del_timer_sync(&usbhid->io_retry);
1231 cancel_work_sync(&usbhid->reset_work);
1232 }
1233
1234 static void hid_cease_io(struct usbhid_device *usbhid)
1235 {
1236 del_timer(&usbhid->io_retry);
1237 usb_kill_urb(usbhid->urbin);
1238 usb_kill_urb(usbhid->urbctrl);
1239 usb_kill_urb(usbhid->urbout);
1240 }
1241
1242 /* Treat USB reset pretty much the same as suspend/resume */
1243 static int hid_pre_reset(struct usb_interface *intf)
1244 {
1245 struct hid_device *hid = usb_get_intfdata(intf);
1246 struct usbhid_device *usbhid = hid->driver_data;
1247
1248 spin_lock_irq(&usbhid->lock);
1249 set_bit(HID_RESET_PENDING, &usbhid->iofl);
1250 spin_unlock_irq(&usbhid->lock);
1251 hid_cease_io(usbhid);
1252
1253 return 0;
1254 }
1255
1256 /* Same routine used for post_reset and reset_resume */
1257 static int hid_post_reset(struct usb_interface *intf)
1258 {
1259 struct usb_device *dev = interface_to_usbdev (intf);
1260 struct hid_device *hid = usb_get_intfdata(intf);
1261 struct usbhid_device *usbhid = hid->driver_data;
1262 int status;
1263
1264 spin_lock_irq(&usbhid->lock);
1265 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1266 spin_unlock_irq(&usbhid->lock);
1267 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1268 status = hid_start_in(hid);
1269 if (status < 0)
1270 hid_io_error(hid);
1271 usbhid_restart_queues(usbhid);
1272
1273 return 0;
1274 }
1275
1276 int usbhid_get_power(struct hid_device *hid)
1277 {
1278 struct usbhid_device *usbhid = hid->driver_data;
1279
1280 return usb_autopm_get_interface(usbhid->intf);
1281 }
1282
1283 void usbhid_put_power(struct hid_device *hid)
1284 {
1285 struct usbhid_device *usbhid = hid->driver_data;
1286
1287 usb_autopm_put_interface(usbhid->intf);
1288 }
1289
1290
1291 #ifdef CONFIG_PM
1292 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1293 {
1294 struct hid_device *hid = usb_get_intfdata(intf);
1295 struct usbhid_device *usbhid = hid->driver_data;
1296 int status;
1297
1298 if (message.event & PM_EVENT_AUTO) {
1299 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1300 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1301 && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1302 && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1303 && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1304 && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1305 && (!usbhid->ledcount || ignoreled))
1306 {
1307 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1308 spin_unlock_irq(&usbhid->lock);
1309 if (hid->driver && hid->driver->suspend) {
1310 status = hid->driver->suspend(hid, message);
1311 if (status < 0)
1312 return status;
1313 }
1314 } else {
1315 usbhid_mark_busy(usbhid);
1316 spin_unlock_irq(&usbhid->lock);
1317 return -EBUSY;
1318 }
1319
1320 } else {
1321 if (hid->driver && hid->driver->suspend) {
1322 status = hid->driver->suspend(hid, message);
1323 if (status < 0)
1324 return status;
1325 }
1326 spin_lock_irq(&usbhid->lock);
1327 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1328 spin_unlock_irq(&usbhid->lock);
1329 if (usbhid_wait_io(hid) < 0)
1330 return -EIO;
1331 }
1332
1333 if (!ignoreled && (message.event & PM_EVENT_AUTO)) {
1334 spin_lock_irq(&usbhid->lock);
1335 if (test_bit(HID_LED_ON, &usbhid->iofl)) {
1336 spin_unlock_irq(&usbhid->lock);
1337 usbhid_mark_busy(usbhid);
1338 return -EBUSY;
1339 }
1340 spin_unlock_irq(&usbhid->lock);
1341 }
1342
1343 hid_cancel_delayed_stuff(usbhid);
1344 hid_cease_io(usbhid);
1345
1346 if ((message.event & PM_EVENT_AUTO) &&
1347 test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1348 /* lost race against keypresses */
1349 status = hid_start_in(hid);
1350 if (status < 0)
1351 hid_io_error(hid);
1352 usbhid_mark_busy(usbhid);
1353 return -EBUSY;
1354 }
1355 dev_dbg(&intf->dev, "suspend\n");
1356 return 0;
1357 }
1358
1359 static int hid_resume(struct usb_interface *intf)
1360 {
1361 struct hid_device *hid = usb_get_intfdata (intf);
1362 struct usbhid_device *usbhid = hid->driver_data;
1363 int status;
1364
1365 if (!test_bit(HID_STARTED, &usbhid->iofl))
1366 return 0;
1367
1368 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1369 usbhid_mark_busy(usbhid);
1370
1371 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1372 test_bit(HID_RESET_PENDING, &usbhid->iofl))
1373 schedule_work(&usbhid->reset_work);
1374 usbhid->retry_delay = 0;
1375 status = hid_start_in(hid);
1376 if (status < 0)
1377 hid_io_error(hid);
1378 usbhid_restart_queues(usbhid);
1379
1380 if (status >= 0 && hid->driver && hid->driver->resume) {
1381 int ret = hid->driver->resume(hid);
1382 if (ret < 0)
1383 status = ret;
1384 }
1385 dev_dbg(&intf->dev, "resume status %d\n", status);
1386 return 0;
1387 }
1388
1389 static int hid_reset_resume(struct usb_interface *intf)
1390 {
1391 struct hid_device *hid = usb_get_intfdata(intf);
1392 struct usbhid_device *usbhid = hid->driver_data;
1393 int status;
1394
1395 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1396 status = hid_post_reset(intf);
1397 if (status >= 0 && hid->driver && hid->driver->reset_resume) {
1398 int ret = hid->driver->reset_resume(hid);
1399 if (ret < 0)
1400 status = ret;
1401 }
1402 return status;
1403 }
1404
1405 #endif /* CONFIG_PM */
1406
1407 static const struct usb_device_id hid_usb_ids[] = {
1408 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1409 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1410 { } /* Terminating entry */
1411 };
1412
1413 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1414
1415 static struct usb_driver hid_driver = {
1416 .name = "usbhid",
1417 .probe = usbhid_probe,
1418 .disconnect = usbhid_disconnect,
1419 #ifdef CONFIG_PM
1420 .suspend = hid_suspend,
1421 .resume = hid_resume,
1422 .reset_resume = hid_reset_resume,
1423 #endif
1424 .pre_reset = hid_pre_reset,
1425 .post_reset = hid_post_reset,
1426 .id_table = hid_usb_ids,
1427 .supports_autosuspend = 1,
1428 };
1429
1430 static const struct hid_device_id hid_usb_table[] = {
1431 { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1432 { }
1433 };
1434
1435 struct usb_interface *usbhid_find_interface(int minor)
1436 {
1437 return usb_find_interface(&hid_driver, minor);
1438 }
1439
1440 static struct hid_driver hid_usb_driver = {
1441 .name = "generic-usb",
1442 .id_table = hid_usb_table,
1443 };
1444
1445 static int __init hid_init(void)
1446 {
1447 int retval = -ENOMEM;
1448
1449 retval = hid_register_driver(&hid_usb_driver);
1450 if (retval)
1451 goto hid_register_fail;
1452 retval = usbhid_quirks_init(quirks_param);
1453 if (retval)
1454 goto usbhid_quirks_init_fail;
1455 retval = usb_register(&hid_driver);
1456 if (retval)
1457 goto usb_register_fail;
1458 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1459
1460 return 0;
1461 usb_register_fail:
1462 usbhid_quirks_exit();
1463 usbhid_quirks_init_fail:
1464 hid_unregister_driver(&hid_usb_driver);
1465 hid_register_fail:
1466 return retval;
1467 }
1468
1469 static void __exit hid_exit(void)
1470 {
1471 usb_deregister(&hid_driver);
1472 usbhid_quirks_exit();
1473 hid_unregister_driver(&hid_usb_driver);
1474 }
1475
1476 module_init(hid_init);
1477 module_exit(hid_exit);
1478
1479 MODULE_AUTHOR("Andreas Gal");
1480 MODULE_AUTHOR("Vojtech Pavlik");
1481 MODULE_AUTHOR("Jiri Kosina");
1482 MODULE_DESCRIPTION(DRIVER_DESC);
1483 MODULE_LICENSE(DRIVER_LICENSE);
Linux kernel - Deliverables
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