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Add linux-next specific files for 20110831
[linux-2.6/next.git] / drivers / hid / usbhid / hid-core.c
bloba9fa294ee7d361b0885954099c5c451543024873
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_get_raw_report(struct hid_device *hid,
803 unsigned char report_number, __u8 *buf, size_t count,
804 unsigned char report_type)
805 {
806 struct usbhid_device *usbhid = hid->driver_data;
807 struct usb_device *dev = hid_to_usb_dev(hid);
808 struct usb_interface *intf = usbhid->intf;
809 struct usb_host_interface *interface = intf->cur_altsetting;
810 int skipped_report_id = 0;
811 int ret;
812
813 /* Byte 0 is the report number. Report data starts at byte 1.*/
814 buf[0] = report_number;
815 if (report_number == 0x0) {
816 /* Offset the return buffer by 1, so that the report ID
817 will remain in byte 0. */
818 buf++;
819 count--;
820 skipped_report_id = 1;
821 }
822 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
823 HID_REQ_GET_REPORT,
824 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
825 ((report_type + 1) << 8) | report_number,
826 interface->desc.bInterfaceNumber, buf, count,
827 USB_CTRL_SET_TIMEOUT);
828
829 /* count also the report id */
830 if (ret > 0 && skipped_report_id)
831 ret++;
832
833 return ret;
834 }
835
836 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count,
837 unsigned char report_type)
838 {
839 struct usbhid_device *usbhid = hid->driver_data;
840 struct usb_device *dev = hid_to_usb_dev(hid);
841 struct usb_interface *intf = usbhid->intf;
842 struct usb_host_interface *interface = intf->cur_altsetting;
843 int ret;
844
845 if (usbhid->urbout && report_type != HID_FEATURE_REPORT) {
846 int actual_length;
847 int skipped_report_id = 0;
848
849 if (buf[0] == 0x0) {
850 /* Don't send the Report ID */
851 buf++;
852 count--;
853 skipped_report_id = 1;
854 }
855 ret = usb_interrupt_msg(dev, usbhid->urbout->pipe,
856 buf, count, &actual_length,
857 USB_CTRL_SET_TIMEOUT);
858 /* return the number of bytes transferred */
859 if (ret == 0) {
860 ret = actual_length;
861 /* count also the report id */
862 if (skipped_report_id)
863 ret++;
864 }
865 } else {
866 int skipped_report_id = 0;
867 int report_id = buf[0];
868 if (buf[0] == 0x0) {
869 /* Don't send the Report ID */
870 buf++;
871 count--;
872 skipped_report_id = 1;
873 }
874 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
875 HID_REQ_SET_REPORT,
876 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
877 ((report_type + 1) << 8) | report_id,
878 interface->desc.bInterfaceNumber, buf, count,
879 USB_CTRL_SET_TIMEOUT);
880 /* count also the report id, if this was a numbered report. */
881 if (ret > 0 && skipped_report_id)
882 ret++;
883 }
884
885 return ret;
886 }
887
888 static void usbhid_restart_queues(struct usbhid_device *usbhid)
889 {
890 if (usbhid->urbout)
891 usbhid_restart_out_queue(usbhid);
892 usbhid_restart_ctrl_queue(usbhid);
893 }
894
895 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
896 {
897 struct usbhid_device *usbhid = hid->driver_data;
898
899 usb_free_coherent(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
900 usb_free_coherent(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
901 kfree(usbhid->cr);
902 usb_free_coherent(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
903 }
904
905 static int usbhid_parse(struct hid_device *hid)
906 {
907 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
908 struct usb_host_interface *interface = intf->cur_altsetting;
909 struct usb_device *dev = interface_to_usbdev (intf);
910 struct hid_descriptor *hdesc;
911 u32 quirks = 0;
912 unsigned int rsize = 0;
913 char *rdesc;
914 int ret, n;
915
916 quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
917 le16_to_cpu(dev->descriptor.idProduct));
918
919 if (quirks & HID_QUIRK_IGNORE)
920 return -ENODEV;
921
922 /* Many keyboards and mice don't like to be polled for reports,
923 * so we will always set the HID_QUIRK_NOGET flag for them. */
924 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
925 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
926 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
927 quirks |= HID_QUIRK_NOGET;
928 }
929
930 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
931 (!interface->desc.bNumEndpoints ||
932 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
933 dbg_hid("class descriptor not present\n");
934 return -ENODEV;
935 }
936
937 hid->version = le16_to_cpu(hdesc->bcdHID);
938 hid->country = hdesc->bCountryCode;
939
940 for (n = 0; n < hdesc->bNumDescriptors; n++)
941 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
942 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
943
944 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
945 dbg_hid("weird size of report descriptor (%u)\n", rsize);
946 return -EINVAL;
947 }
948
949 if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
950 dbg_hid("couldn't allocate rdesc memory\n");
951 return -ENOMEM;
952 }
953
954 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
955
956 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
957 HID_DT_REPORT, rdesc, rsize);
958 if (ret < 0) {
959 dbg_hid("reading report descriptor failed\n");
960 kfree(rdesc);
961 goto err;
962 }
963
964 ret = hid_parse_report(hid, rdesc, rsize);
965 kfree(rdesc);
966 if (ret) {
967 dbg_hid("parsing report descriptor failed\n");
968 goto err;
969 }
970
971 hid->quirks |= quirks;
972
973 return 0;
974 err:
975 return ret;
976 }
977
978 static int usbhid_start(struct hid_device *hid)
979 {
980 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
981 struct usb_host_interface *interface = intf->cur_altsetting;
982 struct usb_device *dev = interface_to_usbdev(intf);
983 struct usbhid_device *usbhid = hid->driver_data;
984 unsigned int n, insize = 0;
985 int ret;
986
987 clear_bit(HID_DISCONNECTED, &usbhid->iofl);
988
989 usbhid->bufsize = HID_MIN_BUFFER_SIZE;
990 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
991 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
992 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
993
994 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
995 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
996
997 hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
998
999 if (insize > HID_MAX_BUFFER_SIZE)
1000 insize = HID_MAX_BUFFER_SIZE;
1001
1002 if (hid_alloc_buffers(dev, hid)) {
1003 ret = -ENOMEM;
1004 goto fail;
1005 }
1006
1007 for (n = 0; n < interface->desc.bNumEndpoints; n++) {
1008 struct usb_endpoint_descriptor *endpoint;
1009 int pipe;
1010 int interval;
1011
1012 endpoint = &interface->endpoint[n].desc;
1013 if (!usb_endpoint_xfer_int(endpoint))
1014 continue;
1015
1016 interval = endpoint->bInterval;
1017
1018 /* Some vendors give fullspeed interval on highspeed devides */
1019 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
1020 dev->speed == USB_SPEED_HIGH) {
1021 interval = fls(endpoint->bInterval*8);
1022 printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
1023 hid->name, endpoint->bInterval, interval);
1024 }
1025
1026 /* Change the polling interval of mice. */
1027 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
1028 interval = hid_mousepoll_interval;
1029
1030 ret = -ENOMEM;
1031 if (usb_endpoint_dir_in(endpoint)) {
1032 if (usbhid->urbin)
1033 continue;
1034 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
1035 goto fail;
1036 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
1037 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
1038 hid_irq_in, hid, interval);
1039 usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
1040 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1041 } else {
1042 if (usbhid->urbout)
1043 continue;
1044 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
1045 goto fail;
1046 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
1047 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
1048 hid_irq_out, hid, interval);
1049 usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
1050 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1051 }
1052 }
1053
1054 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
1055 if (!usbhid->urbctrl) {
1056 ret = -ENOMEM;
1057 goto fail;
1058 }
1059
1060 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
1061 usbhid->ctrlbuf, 1, hid_ctrl, hid);
1062 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
1063 usbhid->urbctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1064
1065 if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS))
1066 usbhid_init_reports(hid);
1067
1068 set_bit(HID_STARTED, &usbhid->iofl);
1069
1070 /* Some keyboards don't work until their LEDs have been set.
1071 * Since BIOSes do set the LEDs, it must be safe for any device
1072 * that supports the keyboard boot protocol.
1073 * In addition, enable remote wakeup by default for all keyboard
1074 * devices supporting the boot protocol.
1075 */
1076 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1077 interface->desc.bInterfaceProtocol ==
1078 USB_INTERFACE_PROTOCOL_KEYBOARD) {
1079 usbhid_set_leds(hid);
1080 device_set_wakeup_enable(&dev->dev, 1);
1081 }
1082 return 0;
1083
1084 fail:
1085 usb_free_urb(usbhid->urbin);
1086 usb_free_urb(usbhid->urbout);
1087 usb_free_urb(usbhid->urbctrl);
1088 usbhid->urbin = NULL;
1089 usbhid->urbout = NULL;
1090 usbhid->urbctrl = NULL;
1091 hid_free_buffers(dev, hid);
1092 return ret;
1093 }
1094
1095 static void usbhid_stop(struct hid_device *hid)
1096 {
1097 struct usbhid_device *usbhid = hid->driver_data;
1098
1099 if (WARN_ON(!usbhid))
1100 return;
1101
1102 clear_bit(HID_STARTED, &usbhid->iofl);
1103 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1104 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1105 spin_unlock_irq(&usbhid->lock);
1106 usb_kill_urb(usbhid->urbin);
1107 usb_kill_urb(usbhid->urbout);
1108 usb_kill_urb(usbhid->urbctrl);
1109
1110 hid_cancel_delayed_stuff(usbhid);
1111
1112 hid->claimed = 0;
1113
1114 usb_free_urb(usbhid->urbin);
1115 usb_free_urb(usbhid->urbctrl);
1116 usb_free_urb(usbhid->urbout);
1117 usbhid->urbin = NULL; /* don't mess up next start */
1118 usbhid->urbctrl = NULL;
1119 usbhid->urbout = NULL;
1120
1121 hid_free_buffers(hid_to_usb_dev(hid), hid);
1122 }
1123
1124 static int usbhid_power(struct hid_device *hid, int lvl)
1125 {
1126 int r = 0;
1127
1128 switch (lvl) {
1129 case PM_HINT_FULLON:
1130 r = usbhid_get_power(hid);
1131 break;
1132 case PM_HINT_NORMAL:
1133 usbhid_put_power(hid);
1134 break;
1135 }
1136 return r;
1137 }
1138
1139 static struct hid_ll_driver usb_hid_driver = {
1140 .parse = usbhid_parse,
1141 .start = usbhid_start,
1142 .stop = usbhid_stop,
1143 .open = usbhid_open,
1144 .close = usbhid_close,
1145 .power = usbhid_power,
1146 .hidinput_input_event = usb_hidinput_input_event,
1147 };
1148
1149 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1150 {
1151 struct usb_host_interface *interface = intf->cur_altsetting;
1152 struct usb_device *dev = interface_to_usbdev(intf);
1153 struct usbhid_device *usbhid;
1154 struct hid_device *hid;
1155 unsigned int n, has_in = 0;
1156 size_t len;
1157 int ret;
1158
1159 dbg_hid("HID probe called for ifnum %d\n",
1160 intf->altsetting->desc.bInterfaceNumber);
1161
1162 for (n = 0; n < interface->desc.bNumEndpoints; n++)
1163 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1164 has_in++;
1165 if (!has_in) {
1166 hid_err(intf, "couldn't find an input interrupt endpoint\n");
1167 return -ENODEV;
1168 }
1169
1170 hid = hid_allocate_device();
1171 if (IS_ERR(hid))
1172 return PTR_ERR(hid);
1173
1174 usb_set_intfdata(intf, hid);
1175 hid->ll_driver = &usb_hid_driver;
1176 hid->hid_get_raw_report = usbhid_get_raw_report;
1177 hid->hid_output_raw_report = usbhid_output_raw_report;
1178 hid->ff_init = hid_pidff_init;
1179 #ifdef CONFIG_USB_HIDDEV
1180 hid->hiddev_connect = hiddev_connect;
1181 hid->hiddev_disconnect = hiddev_disconnect;
1182 hid->hiddev_hid_event = hiddev_hid_event;
1183 hid->hiddev_report_event = hiddev_report_event;
1184 #endif
1185 hid->dev.parent = &intf->dev;
1186 hid->bus = BUS_USB;
1187 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1188 hid->product = le16_to_cpu(dev->descriptor.idProduct);
1189 hid->name[0] = 0;
1190 hid->quirks = usbhid_lookup_quirk(hid->vendor, hid->product);
1191 if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1192 USB_INTERFACE_PROTOCOL_MOUSE)
1193 hid->type = HID_TYPE_USBMOUSE;
1194 else if (intf->cur_altsetting->desc.bInterfaceProtocol == 0)
1195 hid->type = HID_TYPE_USBNONE;
1196
1197 if (dev->manufacturer)
1198 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1199
1200 if (dev->product) {
1201 if (dev->manufacturer)
1202 strlcat(hid->name, " ", sizeof(hid->name));
1203 strlcat(hid->name, dev->product, sizeof(hid->name));
1204 }
1205
1206 if (!strlen(hid->name))
1207 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1208 le16_to_cpu(dev->descriptor.idVendor),
1209 le16_to_cpu(dev->descriptor.idProduct));
1210
1211 usb_make_path(dev, hid->phys, sizeof(hid->phys));
1212 strlcat(hid->phys, "/input", sizeof(hid->phys));
1213 len = strlen(hid->phys);
1214 if (len < sizeof(hid->phys) - 1)
1215 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1216 "%d", intf->altsetting[0].desc.bInterfaceNumber);
1217
1218 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1219 hid->uniq[0] = 0;
1220
1221 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1222 if (usbhid == NULL) {
1223 ret = -ENOMEM;
1224 goto err;
1225 }
1226
1227 hid->driver_data = usbhid;
1228 usbhid->hid = hid;
1229 usbhid->intf = intf;
1230 usbhid->ifnum = interface->desc.bInterfaceNumber;
1231
1232 init_waitqueue_head(&usbhid->wait);
1233 INIT_WORK(&usbhid->reset_work, hid_reset);
1234 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
1235 spin_lock_init(&usbhid->lock);
1236
1237 ret = hid_add_device(hid);
1238 if (ret) {
1239 if (ret != -ENODEV)
1240 hid_err(intf, "can't add hid device: %d\n", ret);
1241 goto err_free;
1242 }
1243
1244 return 0;
1245 err_free:
1246 kfree(usbhid);
1247 err:
1248 hid_destroy_device(hid);
1249 return ret;
1250 }
1251
1252 static void usbhid_disconnect(struct usb_interface *intf)
1253 {
1254 struct hid_device *hid = usb_get_intfdata(intf);
1255 struct usbhid_device *usbhid;
1256
1257 if (WARN_ON(!hid))
1258 return;
1259
1260 usbhid = hid->driver_data;
1261 hid_destroy_device(hid);
1262 kfree(usbhid);
1263 }
1264
1265 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1266 {
1267 del_timer_sync(&usbhid->io_retry);
1268 cancel_work_sync(&usbhid->reset_work);
1269 }
1270
1271 static void hid_cease_io(struct usbhid_device *usbhid)
1272 {
1273 del_timer(&usbhid->io_retry);
1274 usb_kill_urb(usbhid->urbin);
1275 usb_kill_urb(usbhid->urbctrl);
1276 usb_kill_urb(usbhid->urbout);
1277 }
1278
1279 /* Treat USB reset pretty much the same as suspend/resume */
1280 static int hid_pre_reset(struct usb_interface *intf)
1281 {
1282 struct hid_device *hid = usb_get_intfdata(intf);
1283 struct usbhid_device *usbhid = hid->driver_data;
1284
1285 spin_lock_irq(&usbhid->lock);
1286 set_bit(HID_RESET_PENDING, &usbhid->iofl);
1287 spin_unlock_irq(&usbhid->lock);
1288 hid_cease_io(usbhid);
1289
1290 return 0;
1291 }
1292
1293 /* Same routine used for post_reset and reset_resume */
1294 static int hid_post_reset(struct usb_interface *intf)
1295 {
1296 struct usb_device *dev = interface_to_usbdev (intf);
1297 struct hid_device *hid = usb_get_intfdata(intf);
1298 struct usbhid_device *usbhid = hid->driver_data;
1299 int status;
1300
1301 spin_lock_irq(&usbhid->lock);
1302 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1303 spin_unlock_irq(&usbhid->lock);
1304 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1305 status = hid_start_in(hid);
1306 if (status < 0)
1307 hid_io_error(hid);
1308 usbhid_restart_queues(usbhid);
1309
1310 return 0;
1311 }
1312
1313 int usbhid_get_power(struct hid_device *hid)
1314 {
1315 struct usbhid_device *usbhid = hid->driver_data;
1316
1317 return usb_autopm_get_interface(usbhid->intf);
1318 }
1319
1320 void usbhid_put_power(struct hid_device *hid)
1321 {
1322 struct usbhid_device *usbhid = hid->driver_data;
1323
1324 usb_autopm_put_interface(usbhid->intf);
1325 }
1326
1327
1328 #ifdef CONFIG_PM
1329 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1330 {
1331 struct hid_device *hid = usb_get_intfdata(intf);
1332 struct usbhid_device *usbhid = hid->driver_data;
1333 int status;
1334
1335 if (PMSG_IS_AUTO(message)) {
1336 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1337 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1338 && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1339 && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1340 && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1341 && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1342 && (!usbhid->ledcount || ignoreled))
1343 {
1344 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1345 spin_unlock_irq(&usbhid->lock);
1346 if (hid->driver && hid->driver->suspend) {
1347 status = hid->driver->suspend(hid, message);
1348 if (status < 0)
1349 return status;
1350 }
1351 } else {
1352 usbhid_mark_busy(usbhid);
1353 spin_unlock_irq(&usbhid->lock);
1354 return -EBUSY;
1355 }
1356
1357 } else {
1358 if (hid->driver && hid->driver->suspend) {
1359 status = hid->driver->suspend(hid, message);
1360 if (status < 0)
1361 return status;
1362 }
1363 spin_lock_irq(&usbhid->lock);
1364 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1365 spin_unlock_irq(&usbhid->lock);
1366 if (usbhid_wait_io(hid) < 0)
1367 return -EIO;
1368 }
1369
1370 if (!ignoreled && PMSG_IS_AUTO(message)) {
1371 spin_lock_irq(&usbhid->lock);
1372 if (test_bit(HID_LED_ON, &usbhid->iofl)) {
1373 spin_unlock_irq(&usbhid->lock);
1374 usbhid_mark_busy(usbhid);
1375 return -EBUSY;
1376 }
1377 spin_unlock_irq(&usbhid->lock);
1378 }
1379
1380 hid_cancel_delayed_stuff(usbhid);
1381 hid_cease_io(usbhid);
1382
1383 if (PMSG_IS_AUTO(message) && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1384 /* lost race against keypresses */
1385 status = hid_start_in(hid);
1386 if (status < 0)
1387 hid_io_error(hid);
1388 usbhid_mark_busy(usbhid);
1389 return -EBUSY;
1390 }
1391 dev_dbg(&intf->dev, "suspend\n");
1392 return 0;
1393 }
1394
1395 static int hid_resume(struct usb_interface *intf)
1396 {
1397 struct hid_device *hid = usb_get_intfdata (intf);
1398 struct usbhid_device *usbhid = hid->driver_data;
1399 int status;
1400
1401 if (!test_bit(HID_STARTED, &usbhid->iofl))
1402 return 0;
1403
1404 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1405 usbhid_mark_busy(usbhid);
1406
1407 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1408 test_bit(HID_RESET_PENDING, &usbhid->iofl))
1409 schedule_work(&usbhid->reset_work);
1410 usbhid->retry_delay = 0;
1411 status = hid_start_in(hid);
1412 if (status < 0)
1413 hid_io_error(hid);
1414 usbhid_restart_queues(usbhid);
1415
1416 if (status >= 0 && hid->driver && hid->driver->resume) {
1417 int ret = hid->driver->resume(hid);
1418 if (ret < 0)
1419 status = ret;
1420 }
1421 dev_dbg(&intf->dev, "resume status %d\n", status);
1422 return 0;
1423 }
1424
1425 static int hid_reset_resume(struct usb_interface *intf)
1426 {
1427 struct hid_device *hid = usb_get_intfdata(intf);
1428 struct usbhid_device *usbhid = hid->driver_data;
1429 int status;
1430
1431 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1432 status = hid_post_reset(intf);
1433 if (status >= 0 && hid->driver && hid->driver->reset_resume) {
1434 int ret = hid->driver->reset_resume(hid);
1435 if (ret < 0)
1436 status = ret;
1437 }
1438 return status;
1439 }
1440
1441 #endif /* CONFIG_PM */
1442
1443 static const struct usb_device_id hid_usb_ids[] = {
1444 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1445 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1446 { } /* Terminating entry */
1447 };
1448
1449 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1450
1451 static struct usb_driver hid_driver = {
1452 .name = "usbhid",
1453 .probe = usbhid_probe,
1454 .disconnect = usbhid_disconnect,
1455 #ifdef CONFIG_PM
1456 .suspend = hid_suspend,
1457 .resume = hid_resume,
1458 .reset_resume = hid_reset_resume,
1459 #endif
1460 .pre_reset = hid_pre_reset,
1461 .post_reset = hid_post_reset,
1462 .id_table = hid_usb_ids,
1463 .supports_autosuspend = 1,
1464 };
1465
1466 static const struct hid_device_id hid_usb_table[] = {
1467 { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1468 { }
1469 };
1470
1471 struct usb_interface *usbhid_find_interface(int minor)
1472 {
1473 return usb_find_interface(&hid_driver, minor);
1474 }
1475
1476 static struct hid_driver hid_usb_driver = {
1477 .name = "generic-usb",
1478 .id_table = hid_usb_table,
1479 };
1480
1481 static int __init hid_init(void)
1482 {
1483 int retval = -ENOMEM;
1484
1485 retval = hid_register_driver(&hid_usb_driver);
1486 if (retval)
1487 goto hid_register_fail;
1488 retval = usbhid_quirks_init(quirks_param);
1489 if (retval)
1490 goto usbhid_quirks_init_fail;
1491 retval = usb_register(&hid_driver);
1492 if (retval)
1493 goto usb_register_fail;
1494 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1495
1496 return 0;
1497 usb_register_fail:
1498 usbhid_quirks_exit();
1499 usbhid_quirks_init_fail:
1500 hid_unregister_driver(&hid_usb_driver);
1501 hid_register_fail:
1502 return retval;
1503 }
1504
1505 static void __exit hid_exit(void)
1506 {
1507 usb_deregister(&hid_driver);
1508 usbhid_quirks_exit();
1509 hid_unregister_driver(&hid_usb_driver);
1510 }
1511
1512 module_init(hid_init);
1513 module_exit(hid_exit);
1514
1515 MODULE_AUTHOR("Andreas Gal");
1516 MODULE_AUTHOR("Vojtech Pavlik");
1517 MODULE_AUTHOR("Jiri Kosina");
1518 MODULE_DESCRIPTION(DRIVER_DESC);
1519 MODULE_LICENSE(DRIVER_LICENSE);
linux-next