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Merge tag 'sound-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
[GitHub/mt8127/android_kernel_alcatel_ttab.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 #include <linux/string.h>
32
33 #include <linux/usb.h>
34
35 #include <linux/hid.h>
36 #include <linux/hiddev.h>
37 #include <linux/hid-debug.h>
38 #include <linux/hidraw.h>
39 #include "usbhid.h"
40
41 /*
42 * Version Information
43 */
44
45 #define DRIVER_DESC "USB HID core driver"
46 #define DRIVER_LICENSE "GPL"
47
48 /*
49 * Module parameters.
50 */
51
52 static unsigned int hid_mousepoll_interval;
53 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
54 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
55
56 static unsigned int ignoreled;
57 module_param_named(ignoreled, ignoreled, uint, 0644);
58 MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds");
59
60 /* Quirks specified at module load time */
61 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
62 module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
63 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
64 " quirks=vendorID:productID:quirks"
65 " where vendorID, productID, and quirks are all in"
66 " 0x-prefixed hex");
67 /*
68 * Input submission and I/O error handler.
69 */
70 static DEFINE_MUTEX(hid_open_mut);
71
72 static void hid_io_error(struct hid_device *hid);
73 static int hid_submit_out(struct hid_device *hid);
74 static int hid_submit_ctrl(struct hid_device *hid);
75 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid);
76
77 /* Start up the input URB */
78 static int hid_start_in(struct hid_device *hid)
79 {
80 unsigned long flags;
81 int rc = 0;
82 struct usbhid_device *usbhid = hid->driver_data;
83
84 spin_lock_irqsave(&usbhid->lock, flags);
85 if (hid->open > 0 &&
86 !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
87 !test_bit(HID_SUSPENDED, &usbhid->iofl) &&
88 !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
89 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
90 if (rc != 0) {
91 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
92 if (rc == -ENOSPC)
93 set_bit(HID_NO_BANDWIDTH, &usbhid->iofl);
94 } else {
95 clear_bit(HID_NO_BANDWIDTH, &usbhid->iofl);
96 }
97 }
98 spin_unlock_irqrestore(&usbhid->lock, flags);
99 return rc;
100 }
101
102 /* I/O retry timer routine */
103 static void hid_retry_timeout(unsigned long _hid)
104 {
105 struct hid_device *hid = (struct hid_device *) _hid;
106 struct usbhid_device *usbhid = hid->driver_data;
107
108 dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
109 if (hid_start_in(hid))
110 hid_io_error(hid);
111 }
112
113 /* Workqueue routine to reset the device or clear a halt */
114 static void hid_reset(struct work_struct *work)
115 {
116 struct usbhid_device *usbhid =
117 container_of(work, struct usbhid_device, reset_work);
118 struct hid_device *hid = usbhid->hid;
119 int rc = 0;
120
121 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
122 dev_dbg(&usbhid->intf->dev, "clear halt\n");
123 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
124 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
125 hid_start_in(hid);
126 }
127
128 else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
129 dev_dbg(&usbhid->intf->dev, "resetting device\n");
130 rc = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
131 if (rc == 0) {
132 rc = usb_reset_device(hid_to_usb_dev(hid));
133 usb_unlock_device(hid_to_usb_dev(hid));
134 }
135 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
136 }
137
138 switch (rc) {
139 case 0:
140 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
141 hid_io_error(hid);
142 break;
143 default:
144 hid_err(hid, "can't reset device, %s-%s/input%d, status %d\n",
145 hid_to_usb_dev(hid)->bus->bus_name,
146 hid_to_usb_dev(hid)->devpath,
147 usbhid->ifnum, rc);
148 /* FALLTHROUGH */
149 case -EHOSTUNREACH:
150 case -ENODEV:
151 case -EINTR:
152 break;
153 }
154 }
155
156 /* Main I/O error handler */
157 static void hid_io_error(struct hid_device *hid)
158 {
159 unsigned long flags;
160 struct usbhid_device *usbhid = hid->driver_data;
161
162 spin_lock_irqsave(&usbhid->lock, flags);
163
164 /* Stop when disconnected */
165 if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
166 goto done;
167
168 /* If it has been a while since the last error, we'll assume
169 * this a brand new error and reset the retry timeout. */
170 if (time_after(jiffies, usbhid->stop_retry + HZ/2))
171 usbhid->retry_delay = 0;
172
173 /* When an error occurs, retry at increasing intervals */
174 if (usbhid->retry_delay == 0) {
175 usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */
176 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
177 } else if (usbhid->retry_delay < 100)
178 usbhid->retry_delay *= 2;
179
180 if (time_after(jiffies, usbhid->stop_retry)) {
181
182 /* Retries failed, so do a port reset unless we lack bandwidth*/
183 if (test_bit(HID_NO_BANDWIDTH, &usbhid->iofl)
184 && !test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
185
186 schedule_work(&usbhid->reset_work);
187 goto done;
188 }
189 }
190
191 mod_timer(&usbhid->io_retry,
192 jiffies + msecs_to_jiffies(usbhid->retry_delay));
193 done:
194 spin_unlock_irqrestore(&usbhid->lock, flags);
195 }
196
197 static void usbhid_mark_busy(struct usbhid_device *usbhid)
198 {
199 struct usb_interface *intf = usbhid->intf;
200
201 usb_mark_last_busy(interface_to_usbdev(intf));
202 }
203
204 static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
205 {
206 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
207 int kicked;
208 int r;
209
210 if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) ||
211 test_bit(HID_SUSPENDED, &usbhid->iofl))
212 return 0;
213
214 if ((kicked = (usbhid->outhead != usbhid->outtail))) {
215 hid_dbg(hid, "Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
216
217 /* Try to wake up from autosuspend... */
218 r = usb_autopm_get_interface_async(usbhid->intf);
219 if (r < 0)
220 return r;
221
222 /*
223 * If still suspended, don't submit. Submission will
224 * occur if/when resume drains the queue.
225 */
226 if (test_bit(HID_SUSPENDED, &usbhid->iofl)) {
227 usb_autopm_put_interface_no_suspend(usbhid->intf);
228 return r;
229 }
230
231 /* Asynchronously flush queue. */
232 set_bit(HID_OUT_RUNNING, &usbhid->iofl);
233 if (hid_submit_out(hid)) {
234 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
235 usb_autopm_put_interface_async(usbhid->intf);
236 }
237 wake_up(&usbhid->wait);
238 }
239 return kicked;
240 }
241
242 static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
243 {
244 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
245 int kicked;
246 int r;
247
248 WARN_ON(hid == NULL);
249 if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) ||
250 test_bit(HID_SUSPENDED, &usbhid->iofl))
251 return 0;
252
253 if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
254 hid_dbg(hid, "Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
255
256 /* Try to wake up from autosuspend... */
257 r = usb_autopm_get_interface_async(usbhid->intf);
258 if (r < 0)
259 return r;
260
261 /*
262 * If still suspended, don't submit. Submission will
263 * occur if/when resume drains the queue.
264 */
265 if (test_bit(HID_SUSPENDED, &usbhid->iofl)) {
266 usb_autopm_put_interface_no_suspend(usbhid->intf);
267 return r;
268 }
269
270 /* Asynchronously flush queue. */
271 set_bit(HID_CTRL_RUNNING, &usbhid->iofl);
272 if (hid_submit_ctrl(hid)) {
273 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
274 usb_autopm_put_interface_async(usbhid->intf);
275 }
276 wake_up(&usbhid->wait);
277 }
278 return kicked;
279 }
280
281 /*
282 * Input interrupt completion handler.
283 */
284
285 static void hid_irq_in(struct urb *urb)
286 {
287 struct hid_device *hid = urb->context;
288 struct usbhid_device *usbhid = hid->driver_data;
289 int status;
290
291 switch (urb->status) {
292 case 0: /* success */
293 usbhid_mark_busy(usbhid);
294 usbhid->retry_delay = 0;
295 hid_input_report(urb->context, HID_INPUT_REPORT,
296 urb->transfer_buffer,
297 urb->actual_length, 1);
298 /*
299 * autosuspend refused while keys are pressed
300 * because most keyboards don't wake up when
301 * a key is released
302 */
303 if (hid_check_keys_pressed(hid))
304 set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
305 else
306 clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
307 break;
308 case -EPIPE: /* stall */
309 usbhid_mark_busy(usbhid);
310 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
311 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
312 schedule_work(&usbhid->reset_work);
313 return;
314 case -ECONNRESET: /* unlink */
315 case -ENOENT:
316 case -ESHUTDOWN: /* unplug */
317 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
318 return;
319 case -EILSEQ: /* protocol error or unplug */
320 case -EPROTO: /* protocol error or unplug */
321 case -ETIME: /* protocol error or unplug */
322 case -ETIMEDOUT: /* Should never happen, but... */
323 usbhid_mark_busy(usbhid);
324 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
325 hid_io_error(hid);
326 return;
327 default: /* error */
328 hid_warn(urb->dev, "input irq status %d received\n",
329 urb->status);
330 }
331
332 status = usb_submit_urb(urb, GFP_ATOMIC);
333 if (status) {
334 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
335 if (status != -EPERM) {
336 hid_err(hid, "can't resubmit intr, %s-%s/input%d, status %d\n",
337 hid_to_usb_dev(hid)->bus->bus_name,
338 hid_to_usb_dev(hid)->devpath,
339 usbhid->ifnum, status);
340 hid_io_error(hid);
341 }
342 }
343 }
344
345 static int hid_submit_out(struct hid_device *hid)
346 {
347 struct hid_report *report;
348 char *raw_report;
349 struct usbhid_device *usbhid = hid->driver_data;
350 int r;
351
352 report = usbhid->out[usbhid->outtail].report;
353 raw_report = usbhid->out[usbhid->outtail].raw_report;
354
355 usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) +
356 1 + (report->id > 0);
357 usbhid->urbout->dev = hid_to_usb_dev(hid);
358 if (raw_report) {
359 memcpy(usbhid->outbuf, raw_report,
360 usbhid->urbout->transfer_buffer_length);
361 kfree(raw_report);
362 usbhid->out[usbhid->outtail].raw_report = NULL;
363 }
364
365 dbg_hid("submitting out urb\n");
366
367 r = usb_submit_urb(usbhid->urbout, GFP_ATOMIC);
368 if (r < 0) {
369 hid_err(hid, "usb_submit_urb(out) failed: %d\n", r);
370 return r;
371 }
372 usbhid->last_out = jiffies;
373 return 0;
374 }
375
376 static int hid_submit_ctrl(struct hid_device *hid)
377 {
378 struct hid_report *report;
379 unsigned char dir;
380 char *raw_report;
381 int len, r;
382 struct usbhid_device *usbhid = hid->driver_data;
383
384 report = usbhid->ctrl[usbhid->ctrltail].report;
385 raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
386 dir = usbhid->ctrl[usbhid->ctrltail].dir;
387
388 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
389 if (dir == USB_DIR_OUT) {
390 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
391 usbhid->urbctrl->transfer_buffer_length = len;
392 if (raw_report) {
393 memcpy(usbhid->ctrlbuf, raw_report, len);
394 kfree(raw_report);
395 usbhid->ctrl[usbhid->ctrltail].raw_report = NULL;
396 }
397 } else {
398 int maxpacket, padlen;
399
400 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
401 maxpacket = usb_maxpacket(hid_to_usb_dev(hid),
402 usbhid->urbctrl->pipe, 0);
403 if (maxpacket > 0) {
404 padlen = DIV_ROUND_UP(len, maxpacket);
405 padlen *= maxpacket;
406 if (padlen > usbhid->bufsize)
407 padlen = usbhid->bufsize;
408 } else
409 padlen = 0;
410 usbhid->urbctrl->transfer_buffer_length = padlen;
411 }
412 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
413
414 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
415 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT :
416 HID_REQ_GET_REPORT;
417 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) |
418 report->id);
419 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
420 usbhid->cr->wLength = cpu_to_le16(len);
421
422 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
423 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" :
424 "Get_Report",
425 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
426
427 r = usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC);
428 if (r < 0) {
429 hid_err(hid, "usb_submit_urb(ctrl) failed: %d\n", r);
430 return r;
431 }
432 usbhid->last_ctrl = jiffies;
433 return 0;
434 }
435
436 /*
437 * Output interrupt completion handler.
438 */
439
440 static void hid_irq_out(struct urb *urb)
441 {
442 struct hid_device *hid = urb->context;
443 struct usbhid_device *usbhid = hid->driver_data;
444 unsigned long flags;
445 int unplug = 0;
446
447 switch (urb->status) {
448 case 0: /* success */
449 break;
450 case -ESHUTDOWN: /* unplug */
451 unplug = 1;
452 case -EILSEQ: /* protocol error or unplug */
453 case -EPROTO: /* protocol error or unplug */
454 case -ECONNRESET: /* unlink */
455 case -ENOENT:
456 break;
457 default: /* error */
458 hid_warn(urb->dev, "output irq status %d received\n",
459 urb->status);
460 }
461
462 spin_lock_irqsave(&usbhid->lock, flags);
463
464 if (unplug) {
465 usbhid->outtail = usbhid->outhead;
466 } else {
467 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
468
469 if (usbhid->outhead != usbhid->outtail &&
470 hid_submit_out(hid) == 0) {
471 /* Successfully submitted next urb in queue */
472 spin_unlock_irqrestore(&usbhid->lock, flags);
473 return;
474 }
475 }
476
477 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
478 spin_unlock_irqrestore(&usbhid->lock, flags);
479 usb_autopm_put_interface_async(usbhid->intf);
480 wake_up(&usbhid->wait);
481 }
482
483 /*
484 * Control pipe completion handler.
485 */
486
487 static void hid_ctrl(struct urb *urb)
488 {
489 struct hid_device *hid = urb->context;
490 struct usbhid_device *usbhid = hid->driver_data;
491 int unplug = 0, status = urb->status;
492
493 spin_lock(&usbhid->lock);
494
495 switch (status) {
496 case 0: /* success */
497 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
498 hid_input_report(urb->context,
499 usbhid->ctrl[usbhid->ctrltail].report->type,
500 urb->transfer_buffer, urb->actual_length, 0);
501 break;
502 case -ESHUTDOWN: /* unplug */
503 unplug = 1;
504 case -EILSEQ: /* protocol error or unplug */
505 case -EPROTO: /* protocol error or unplug */
506 case -ECONNRESET: /* unlink */
507 case -ENOENT:
508 case -EPIPE: /* report not available */
509 break;
510 default: /* error */
511 hid_warn(urb->dev, "ctrl urb status %d received\n", status);
512 }
513
514 if (unplug) {
515 usbhid->ctrltail = usbhid->ctrlhead;
516 } else {
517 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
518
519 if (usbhid->ctrlhead != usbhid->ctrltail &&
520 hid_submit_ctrl(hid) == 0) {
521 /* Successfully submitted next urb in queue */
522 spin_unlock(&usbhid->lock);
523 return;
524 }
525 }
526
527 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
528 spin_unlock(&usbhid->lock);
529 usb_autopm_put_interface_async(usbhid->intf);
530 wake_up(&usbhid->wait);
531 }
532
533 static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
534 unsigned char dir)
535 {
536 int head;
537 struct usbhid_device *usbhid = hid->driver_data;
538 int len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
539
540 if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
541 return;
542
543 if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
544 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
545 hid_warn(hid, "output queue full\n");
546 return;
547 }
548
549 usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC);
550 if (!usbhid->out[usbhid->outhead].raw_report) {
551 hid_warn(hid, "output queueing failed\n");
552 return;
553 }
554 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
555 usbhid->out[usbhid->outhead].report = report;
556 usbhid->outhead = head;
557
558 /* If the queue isn't running, restart it */
559 if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl)) {
560 usbhid_restart_out_queue(usbhid);
561
562 /* Otherwise see if an earlier request has timed out */
563 } else if (time_after(jiffies, usbhid->last_out + HZ * 5)) {
564
565 /* Prevent autosuspend following the unlink */
566 usb_autopm_get_interface_no_resume(usbhid->intf);
567
568 /*
569 * Prevent resubmission in case the URB completes
570 * before we can unlink it. We don't want to cancel
571 * the wrong transfer!
572 */
573 usb_block_urb(usbhid->urbout);
574
575 /* Drop lock to avoid deadlock if the callback runs */
576 spin_unlock(&usbhid->lock);
577
578 usb_unlink_urb(usbhid->urbout);
579 spin_lock(&usbhid->lock);
580 usb_unblock_urb(usbhid->urbout);
581
582 /* Unlink might have stopped the queue */
583 if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl))
584 usbhid_restart_out_queue(usbhid);
585
586 /* Now we can allow autosuspend again */
587 usb_autopm_put_interface_async(usbhid->intf);
588 }
589 return;
590 }
591
592 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
593 hid_warn(hid, "control queue full\n");
594 return;
595 }
596
597 if (dir == USB_DIR_OUT) {
598 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC);
599 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
600 hid_warn(hid, "control queueing failed\n");
601 return;
602 }
603 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
604 }
605 usbhid->ctrl[usbhid->ctrlhead].report = report;
606 usbhid->ctrl[usbhid->ctrlhead].dir = dir;
607 usbhid->ctrlhead = head;
608
609 /* If the queue isn't running, restart it */
610 if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) {
611 usbhid_restart_ctrl_queue(usbhid);
612
613 /* Otherwise see if an earlier request has timed out */
614 } else if (time_after(jiffies, usbhid->last_ctrl + HZ * 5)) {
615
616 /* Prevent autosuspend following the unlink */
617 usb_autopm_get_interface_no_resume(usbhid->intf);
618
619 /*
620 * Prevent resubmission in case the URB completes
621 * before we can unlink it. We don't want to cancel
622 * the wrong transfer!
623 */
624 usb_block_urb(usbhid->urbctrl);
625
626 /* Drop lock to avoid deadlock if the callback runs */
627 spin_unlock(&usbhid->lock);
628
629 usb_unlink_urb(usbhid->urbctrl);
630 spin_lock(&usbhid->lock);
631 usb_unblock_urb(usbhid->urbctrl);
632
633 /* Unlink might have stopped the queue */
634 if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
635 usbhid_restart_ctrl_queue(usbhid);
636
637 /* Now we can allow autosuspend again */
638 usb_autopm_put_interface_async(usbhid->intf);
639 }
640 }
641
642 static void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
643 {
644 struct usbhid_device *usbhid = hid->driver_data;
645 unsigned long flags;
646
647 spin_lock_irqsave(&usbhid->lock, flags);
648 __usbhid_submit_report(hid, report, dir);
649 spin_unlock_irqrestore(&usbhid->lock, flags);
650 }
651
652 /* Workqueue routine to send requests to change LEDs */
653 static void hid_led(struct work_struct *work)
654 {
655 struct usbhid_device *usbhid =
656 container_of(work, struct usbhid_device, led_work);
657 struct hid_device *hid = usbhid->hid;
658 struct hid_field *field;
659 unsigned long flags;
660
661 field = hidinput_get_led_field(hid);
662 if (!field) {
663 hid_warn(hid, "LED event field not found\n");
664 return;
665 }
666
667 spin_lock_irqsave(&usbhid->lock, flags);
668 if (!test_bit(HID_DISCONNECTED, &usbhid->iofl)) {
669 usbhid->ledcount = hidinput_count_leds(hid);
670 hid_dbg(usbhid->hid, "New ledcount = %u\n", usbhid->ledcount);
671 __usbhid_submit_report(hid, field->report, USB_DIR_OUT);
672 }
673 spin_unlock_irqrestore(&usbhid->lock, flags);
674 }
675
676 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
677 {
678 struct hid_device *hid = input_get_drvdata(dev);
679 struct usbhid_device *usbhid = hid->driver_data;
680 struct hid_field *field;
681 unsigned long flags;
682 int offset;
683
684 if (type == EV_FF)
685 return input_ff_event(dev, type, code, value);
686
687 if (type != EV_LED)
688 return -1;
689
690 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
691 hid_warn(dev, "event field not found\n");
692 return -1;
693 }
694
695 spin_lock_irqsave(&usbhid->lock, flags);
696 hid_set_field(field, offset, value);
697 spin_unlock_irqrestore(&usbhid->lock, flags);
698
699 /*
700 * Defer performing requested LED action.
701 * This is more likely gather all LED changes into a single URB.
702 */
703 schedule_work(&usbhid->led_work);
704
705 return 0;
706 }
707
708 static int usbhid_wait_io(struct hid_device *hid)
709 {
710 struct usbhid_device *usbhid = hid->driver_data;
711
712 if (!wait_event_timeout(usbhid->wait,
713 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
714 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
715 10*HZ)) {
716 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
717 return -1;
718 }
719
720 return 0;
721 }
722
723 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
724 {
725 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
726 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
727 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
728 }
729
730 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
731 unsigned char type, void *buf, int size)
732 {
733 int result, retries = 4;
734
735 memset(buf, 0, size);
736
737 do {
738 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
739 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
740 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
741 retries--;
742 } while (result < size && retries);
743 return result;
744 }
745
746 int usbhid_open(struct hid_device *hid)
747 {
748 struct usbhid_device *usbhid = hid->driver_data;
749 int res = 0;
750
751 mutex_lock(&hid_open_mut);
752 if (!hid->open++) {
753 res = usb_autopm_get_interface(usbhid->intf);
754 /* the device must be awake to reliably request remote wakeup */
755 if (res < 0) {
756 hid->open--;
757 res = -EIO;
758 goto done;
759 }
760 usbhid->intf->needs_remote_wakeup = 1;
761 res = hid_start_in(hid);
762 if (res) {
763 if (res != -ENOSPC) {
764 hid_io_error(hid);
765 res = 0;
766 } else {
767 /* no use opening if resources are insufficient */
768 hid->open--;
769 res = -EBUSY;
770 usbhid->intf->needs_remote_wakeup = 0;
771 }
772 }
773 usb_autopm_put_interface(usbhid->intf);
774 }
775 done:
776 mutex_unlock(&hid_open_mut);
777 return res;
778 }
779
780 void usbhid_close(struct hid_device *hid)
781 {
782 struct usbhid_device *usbhid = hid->driver_data;
783
784 mutex_lock(&hid_open_mut);
785
786 /* protecting hid->open to make sure we don't restart
787 * data acquistion due to a resumption we no longer
788 * care about
789 */
790 spin_lock_irq(&usbhid->lock);
791 if (!--hid->open) {
792 spin_unlock_irq(&usbhid->lock);
793 hid_cancel_delayed_stuff(usbhid);
794 usb_kill_urb(usbhid->urbin);
795 usbhid->intf->needs_remote_wakeup = 0;
796 } else {
797 spin_unlock_irq(&usbhid->lock);
798 }
799 mutex_unlock(&hid_open_mut);
800 }
801
802 /*
803 * Initialize all reports
804 */
805
806 void usbhid_init_reports(struct hid_device *hid)
807 {
808 struct hid_report *report;
809 struct usbhid_device *usbhid = hid->driver_data;
810 int err, ret;
811
812 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
813 usbhid_submit_report(hid, report, USB_DIR_IN);
814
815 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
816 usbhid_submit_report(hid, report, USB_DIR_IN);
817
818 err = 0;
819 ret = usbhid_wait_io(hid);
820 while (ret) {
821 err |= ret;
822 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
823 usb_kill_urb(usbhid->urbctrl);
824 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
825 usb_kill_urb(usbhid->urbout);
826 ret = usbhid_wait_io(hid);
827 }
828
829 if (err)
830 hid_warn(hid, "timeout initializing reports\n");
831 }
832
833 /*
834 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
835 */
836 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
837 unsigned int hid_code, struct hid_field **pfield)
838 {
839 struct hid_report *report;
840 struct hid_field *field;
841 struct hid_usage *usage;
842 int i, j;
843
844 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
845 for (i = 0; i < report->maxfield; i++) {
846 field = report->field[i];
847 for (j = 0; j < field->maxusage; j++) {
848 usage = &field->usage[j];
849 if ((usage->hid & HID_USAGE_PAGE) == page &&
850 (usage->hid & 0xFFFF) == hid_code) {
851 *pfield = field;
852 return j;
853 }
854 }
855 }
856 }
857 return -1;
858 }
859
860 void usbhid_set_leds(struct hid_device *hid)
861 {
862 struct hid_field *field;
863 int offset;
864
865 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
866 hid_set_field(field, offset, 0);
867 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
868 }
869 }
870 EXPORT_SYMBOL_GPL(usbhid_set_leds);
871
872 /*
873 * Traverse the supplied list of reports and find the longest
874 */
875 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
876 unsigned int *max)
877 {
878 struct hid_report *report;
879 unsigned int size;
880
881 list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
882 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
883 if (*max < size)
884 *max = size;
885 }
886 }
887
888 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
889 {
890 struct usbhid_device *usbhid = hid->driver_data;
891
892 usbhid->inbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
893 &usbhid->inbuf_dma);
894 usbhid->outbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
895 &usbhid->outbuf_dma);
896 usbhid->cr = kmalloc(sizeof(*usbhid->cr), GFP_KERNEL);
897 usbhid->ctrlbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
898 &usbhid->ctrlbuf_dma);
899 if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
900 !usbhid->ctrlbuf)
901 return -1;
902
903 return 0;
904 }
905
906 static int usbhid_get_raw_report(struct hid_device *hid,
907 unsigned char report_number, __u8 *buf, size_t count,
908 unsigned char report_type)
909 {
910 struct usbhid_device *usbhid = hid->driver_data;
911 struct usb_device *dev = hid_to_usb_dev(hid);
912 struct usb_interface *intf = usbhid->intf;
913 struct usb_host_interface *interface = intf->cur_altsetting;
914 int skipped_report_id = 0;
915 int ret;
916
917 /* Byte 0 is the report number. Report data starts at byte 1.*/
918 buf[0] = report_number;
919 if (report_number == 0x0) {
920 /* Offset the return buffer by 1, so that the report ID
921 will remain in byte 0. */
922 buf++;
923 count--;
924 skipped_report_id = 1;
925 }
926 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
927 HID_REQ_GET_REPORT,
928 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
929 ((report_type + 1) << 8) | report_number,
930 interface->desc.bInterfaceNumber, buf, count,
931 USB_CTRL_SET_TIMEOUT);
932
933 /* count also the report id */
934 if (ret > 0 && skipped_report_id)
935 ret++;
936
937 return ret;
938 }
939
940 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count,
941 unsigned char report_type)
942 {
943 struct usbhid_device *usbhid = hid->driver_data;
944 struct usb_device *dev = hid_to_usb_dev(hid);
945 struct usb_interface *intf = usbhid->intf;
946 struct usb_host_interface *interface = intf->cur_altsetting;
947 int ret;
948
949 if (usbhid->urbout && report_type != HID_FEATURE_REPORT) {
950 int actual_length;
951 int skipped_report_id = 0;
952
953 if (buf[0] == 0x0) {
954 /* Don't send the Report ID */
955 buf++;
956 count--;
957 skipped_report_id = 1;
958 }
959 ret = usb_interrupt_msg(dev, usbhid->urbout->pipe,
960 buf, count, &actual_length,
961 USB_CTRL_SET_TIMEOUT);
962 /* return the number of bytes transferred */
963 if (ret == 0) {
964 ret = actual_length;
965 /* count also the report id */
966 if (skipped_report_id)
967 ret++;
968 }
969 } else {
970 int skipped_report_id = 0;
971 int report_id = buf[0];
972 if (buf[0] == 0x0) {
973 /* Don't send the Report ID */
974 buf++;
975 count--;
976 skipped_report_id = 1;
977 }
978 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
979 HID_REQ_SET_REPORT,
980 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
981 ((report_type + 1) << 8) | report_id,
982 interface->desc.bInterfaceNumber, buf, count,
983 USB_CTRL_SET_TIMEOUT);
984 /* count also the report id, if this was a numbered report. */
985 if (ret > 0 && skipped_report_id)
986 ret++;
987 }
988
989 return ret;
990 }
991
992 static void usbhid_restart_queues(struct usbhid_device *usbhid)
993 {
994 if (usbhid->urbout && !test_bit(HID_OUT_RUNNING, &usbhid->iofl))
995 usbhid_restart_out_queue(usbhid);
996 if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
997 usbhid_restart_ctrl_queue(usbhid);
998 }
999
1000 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
1001 {
1002 struct usbhid_device *usbhid = hid->driver_data;
1003
1004 usb_free_coherent(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
1005 usb_free_coherent(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
1006 kfree(usbhid->cr);
1007 usb_free_coherent(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
1008 }
1009
1010 static int usbhid_parse(struct hid_device *hid)
1011 {
1012 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
1013 struct usb_host_interface *interface = intf->cur_altsetting;
1014 struct usb_device *dev = interface_to_usbdev (intf);
1015 struct hid_descriptor *hdesc;
1016 u32 quirks = 0;
1017 unsigned int rsize = 0;
1018 char *rdesc;
1019 int ret, n;
1020
1021 quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
1022 le16_to_cpu(dev->descriptor.idProduct));
1023
1024 if (quirks & HID_QUIRK_IGNORE)
1025 return -ENODEV;
1026
1027 /* Many keyboards and mice don't like to be polled for reports,
1028 * so we will always set the HID_QUIRK_NOGET flag for them. */
1029 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
1030 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
1031 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
1032 quirks |= HID_QUIRK_NOGET;
1033 }
1034
1035 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
1036 (!interface->desc.bNumEndpoints ||
1037 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
1038 dbg_hid("class descriptor not present\n");
1039 return -ENODEV;
1040 }
1041
1042 hid->version = le16_to_cpu(hdesc->bcdHID);
1043 hid->country = hdesc->bCountryCode;
1044
1045 for (n = 0; n < hdesc->bNumDescriptors; n++)
1046 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
1047 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
1048
1049 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
1050 dbg_hid("weird size of report descriptor (%u)\n", rsize);
1051 return -EINVAL;
1052 }
1053
1054 if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
1055 dbg_hid("couldn't allocate rdesc memory\n");
1056 return -ENOMEM;
1057 }
1058
1059 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
1060
1061 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
1062 HID_DT_REPORT, rdesc, rsize);
1063 if (ret < 0) {
1064 dbg_hid("reading report descriptor failed\n");
1065 kfree(rdesc);
1066 goto err;
1067 }
1068
1069 ret = hid_parse_report(hid, rdesc, rsize);
1070 kfree(rdesc);
1071 if (ret) {
1072 dbg_hid("parsing report descriptor failed\n");
1073 goto err;
1074 }
1075
1076 hid->quirks |= quirks;
1077
1078 return 0;
1079 err:
1080 return ret;
1081 }
1082
1083 static int usbhid_start(struct hid_device *hid)
1084 {
1085 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
1086 struct usb_host_interface *interface = intf->cur_altsetting;
1087 struct usb_device *dev = interface_to_usbdev(intf);
1088 struct usbhid_device *usbhid = hid->driver_data;
1089 unsigned int n, insize = 0;
1090 int ret;
1091
1092 clear_bit(HID_DISCONNECTED, &usbhid->iofl);
1093
1094 usbhid->bufsize = HID_MIN_BUFFER_SIZE;
1095 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
1096 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
1097 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
1098
1099 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
1100 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
1101
1102 hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
1103
1104 if (insize > HID_MAX_BUFFER_SIZE)
1105 insize = HID_MAX_BUFFER_SIZE;
1106
1107 if (hid_alloc_buffers(dev, hid)) {
1108 ret = -ENOMEM;
1109 goto fail;
1110 }
1111
1112 for (n = 0; n < interface->desc.bNumEndpoints; n++) {
1113 struct usb_endpoint_descriptor *endpoint;
1114 int pipe;
1115 int interval;
1116
1117 endpoint = &interface->endpoint[n].desc;
1118 if (!usb_endpoint_xfer_int(endpoint))
1119 continue;
1120
1121 interval = endpoint->bInterval;
1122
1123 /* Some vendors give fullspeed interval on highspeed devides */
1124 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
1125 dev->speed == USB_SPEED_HIGH) {
1126 interval = fls(endpoint->bInterval*8);
1127 printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
1128 hid->name, endpoint->bInterval, interval);
1129 }
1130
1131 /* Change the polling interval of mice. */
1132 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
1133 interval = hid_mousepoll_interval;
1134
1135 ret = -ENOMEM;
1136 if (usb_endpoint_dir_in(endpoint)) {
1137 if (usbhid->urbin)
1138 continue;
1139 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
1140 goto fail;
1141 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
1142 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
1143 hid_irq_in, hid, interval);
1144 usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
1145 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1146 } else {
1147 if (usbhid->urbout)
1148 continue;
1149 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
1150 goto fail;
1151 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
1152 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
1153 hid_irq_out, hid, interval);
1154 usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
1155 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1156 }
1157 }
1158
1159 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
1160 if (!usbhid->urbctrl) {
1161 ret = -ENOMEM;
1162 goto fail;
1163 }
1164
1165 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
1166 usbhid->ctrlbuf, 1, hid_ctrl, hid);
1167 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
1168 usbhid->urbctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1169
1170 if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS))
1171 usbhid_init_reports(hid);
1172
1173 set_bit(HID_STARTED, &usbhid->iofl);
1174
1175 /* Some keyboards don't work until their LEDs have been set.
1176 * Since BIOSes do set the LEDs, it must be safe for any device
1177 * that supports the keyboard boot protocol.
1178 * In addition, enable remote wakeup by default for all keyboard
1179 * devices supporting the boot protocol.
1180 */
1181 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1182 interface->desc.bInterfaceProtocol ==
1183 USB_INTERFACE_PROTOCOL_KEYBOARD) {
1184 usbhid_set_leds(hid);
1185 device_set_wakeup_enable(&dev->dev, 1);
1186 }
1187 return 0;
1188
1189 fail:
1190 usb_free_urb(usbhid->urbin);
1191 usb_free_urb(usbhid->urbout);
1192 usb_free_urb(usbhid->urbctrl);
1193 usbhid->urbin = NULL;
1194 usbhid->urbout = NULL;
1195 usbhid->urbctrl = NULL;
1196 hid_free_buffers(dev, hid);
1197 return ret;
1198 }
1199
1200 static void usbhid_stop(struct hid_device *hid)
1201 {
1202 struct usbhid_device *usbhid = hid->driver_data;
1203
1204 if (WARN_ON(!usbhid))
1205 return;
1206
1207 clear_bit(HID_STARTED, &usbhid->iofl);
1208 spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */
1209 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1210 spin_unlock_irq(&usbhid->lock);
1211 usb_kill_urb(usbhid->urbin);
1212 usb_kill_urb(usbhid->urbout);
1213 usb_kill_urb(usbhid->urbctrl);
1214
1215 hid_cancel_delayed_stuff(usbhid);
1216
1217 hid->claimed = 0;
1218
1219 usb_free_urb(usbhid->urbin);
1220 usb_free_urb(usbhid->urbctrl);
1221 usb_free_urb(usbhid->urbout);
1222 usbhid->urbin = NULL; /* don't mess up next start */
1223 usbhid->urbctrl = NULL;
1224 usbhid->urbout = NULL;
1225
1226 hid_free_buffers(hid_to_usb_dev(hid), hid);
1227 }
1228
1229 static int usbhid_power(struct hid_device *hid, int lvl)
1230 {
1231 int r = 0;
1232
1233 switch (lvl) {
1234 case PM_HINT_FULLON:
1235 r = usbhid_get_power(hid);
1236 break;
1237 case PM_HINT_NORMAL:
1238 usbhid_put_power(hid);
1239 break;
1240 }
1241 return r;
1242 }
1243
1244 static void usbhid_request(struct hid_device *hid, struct hid_report *rep, int reqtype)
1245 {
1246 switch (reqtype) {
1247 case HID_REQ_GET_REPORT:
1248 usbhid_submit_report(hid, rep, USB_DIR_IN);
1249 break;
1250 case HID_REQ_SET_REPORT:
1251 usbhid_submit_report(hid, rep, USB_DIR_OUT);
1252 break;
1253 }
1254 }
1255
1256 static int usbhid_idle(struct hid_device *hid, int report, int idle,
1257 int reqtype)
1258 {
1259 struct usb_device *dev = hid_to_usb_dev(hid);
1260 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
1261 struct usb_host_interface *interface = intf->cur_altsetting;
1262 int ifnum = interface->desc.bInterfaceNumber;
1263
1264 if (reqtype != HID_REQ_SET_IDLE)
1265 return -EINVAL;
1266
1267 return hid_set_idle(dev, ifnum, report, idle);
1268 }
1269
1270 static struct hid_ll_driver usb_hid_driver = {
1271 .parse = usbhid_parse,
1272 .start = usbhid_start,
1273 .stop = usbhid_stop,
1274 .open = usbhid_open,
1275 .close = usbhid_close,
1276 .power = usbhid_power,
1277 .hidinput_input_event = usb_hidinput_input_event,
1278 .request = usbhid_request,
1279 .wait = usbhid_wait_io,
1280 .idle = usbhid_idle,
1281 };
1282
1283 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1284 {
1285 struct usb_host_interface *interface = intf->cur_altsetting;
1286 struct usb_device *dev = interface_to_usbdev(intf);
1287 struct usbhid_device *usbhid;
1288 struct hid_device *hid;
1289 unsigned int n, has_in = 0;
1290 size_t len;
1291 int ret;
1292
1293 dbg_hid("HID probe called for ifnum %d\n",
1294 intf->altsetting->desc.bInterfaceNumber);
1295
1296 for (n = 0; n < interface->desc.bNumEndpoints; n++)
1297 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1298 has_in++;
1299 if (!has_in) {
1300 hid_err(intf, "couldn't find an input interrupt endpoint\n");
1301 return -ENODEV;
1302 }
1303
1304 hid = hid_allocate_device();
1305 if (IS_ERR(hid))
1306 return PTR_ERR(hid);
1307
1308 usb_set_intfdata(intf, hid);
1309 hid->ll_driver = &usb_hid_driver;
1310 hid->hid_get_raw_report = usbhid_get_raw_report;
1311 hid->hid_output_raw_report = usbhid_output_raw_report;
1312 hid->ff_init = hid_pidff_init;
1313 #ifdef CONFIG_USB_HIDDEV
1314 hid->hiddev_connect = hiddev_connect;
1315 hid->hiddev_disconnect = hiddev_disconnect;
1316 hid->hiddev_hid_event = hiddev_hid_event;
1317 hid->hiddev_report_event = hiddev_report_event;
1318 #endif
1319 hid->dev.parent = &intf->dev;
1320 hid->bus = BUS_USB;
1321 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1322 hid->product = le16_to_cpu(dev->descriptor.idProduct);
1323 hid->name[0] = 0;
1324 hid->quirks = usbhid_lookup_quirk(hid->vendor, hid->product);
1325 if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1326 USB_INTERFACE_PROTOCOL_MOUSE)
1327 hid->type = HID_TYPE_USBMOUSE;
1328 else if (intf->cur_altsetting->desc.bInterfaceProtocol == 0)
1329 hid->type = HID_TYPE_USBNONE;
1330
1331 if (dev->manufacturer)
1332 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1333
1334 if (dev->product) {
1335 if (dev->manufacturer)
1336 strlcat(hid->name, " ", sizeof(hid->name));
1337 strlcat(hid->name, dev->product, sizeof(hid->name));
1338 }
1339
1340 if (!strlen(hid->name))
1341 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1342 le16_to_cpu(dev->descriptor.idVendor),
1343 le16_to_cpu(dev->descriptor.idProduct));
1344
1345 usb_make_path(dev, hid->phys, sizeof(hid->phys));
1346 strlcat(hid->phys, "/input", sizeof(hid->phys));
1347 len = strlen(hid->phys);
1348 if (len < sizeof(hid->phys) - 1)
1349 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1350 "%d", intf->altsetting[0].desc.bInterfaceNumber);
1351
1352 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1353 hid->uniq[0] = 0;
1354
1355 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1356 if (usbhid == NULL) {
1357 ret = -ENOMEM;
1358 goto err;
1359 }
1360
1361 hid->driver_data = usbhid;
1362 usbhid->hid = hid;
1363 usbhid->intf = intf;
1364 usbhid->ifnum = interface->desc.bInterfaceNumber;
1365
1366 init_waitqueue_head(&usbhid->wait);
1367 INIT_WORK(&usbhid->reset_work, hid_reset);
1368 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
1369 spin_lock_init(&usbhid->lock);
1370
1371 INIT_WORK(&usbhid->led_work, hid_led);
1372
1373 ret = hid_add_device(hid);
1374 if (ret) {
1375 if (ret != -ENODEV)
1376 hid_err(intf, "can't add hid device: %d\n", ret);
1377 goto err_free;
1378 }
1379
1380 return 0;
1381 err_free:
1382 kfree(usbhid);
1383 err:
1384 hid_destroy_device(hid);
1385 return ret;
1386 }
1387
1388 static void usbhid_disconnect(struct usb_interface *intf)
1389 {
1390 struct hid_device *hid = usb_get_intfdata(intf);
1391 struct usbhid_device *usbhid;
1392
1393 if (WARN_ON(!hid))
1394 return;
1395
1396 usbhid = hid->driver_data;
1397 hid_destroy_device(hid);
1398 kfree(usbhid);
1399 }
1400
1401 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1402 {
1403 del_timer_sync(&usbhid->io_retry);
1404 cancel_work_sync(&usbhid->reset_work);
1405 cancel_work_sync(&usbhid->led_work);
1406 }
1407
1408 static void hid_cease_io(struct usbhid_device *usbhid)
1409 {
1410 del_timer_sync(&usbhid->io_retry);
1411 usb_kill_urb(usbhid->urbin);
1412 usb_kill_urb(usbhid->urbctrl);
1413 usb_kill_urb(usbhid->urbout);
1414 }
1415
1416 /* Treat USB reset pretty much the same as suspend/resume */
1417 static int hid_pre_reset(struct usb_interface *intf)
1418 {
1419 struct hid_device *hid = usb_get_intfdata(intf);
1420 struct usbhid_device *usbhid = hid->driver_data;
1421
1422 spin_lock_irq(&usbhid->lock);
1423 set_bit(HID_RESET_PENDING, &usbhid->iofl);
1424 spin_unlock_irq(&usbhid->lock);
1425 hid_cease_io(usbhid);
1426
1427 return 0;
1428 }
1429
1430 /* Same routine used for post_reset and reset_resume */
1431 static int hid_post_reset(struct usb_interface *intf)
1432 {
1433 struct usb_device *dev = interface_to_usbdev (intf);
1434 struct hid_device *hid = usb_get_intfdata(intf);
1435 struct usbhid_device *usbhid = hid->driver_data;
1436 struct usb_host_interface *interface = intf->cur_altsetting;
1437 int status;
1438 char *rdesc;
1439
1440 /* Fetch and examine the HID report descriptor. If this
1441 * has changed, then rebind. Since usbcore's check of the
1442 * configuration descriptors passed, we already know that
1443 * the size of the HID report descriptor has not changed.
1444 */
1445 rdesc = kmalloc(hid->dev_rsize, GFP_KERNEL);
1446 if (!rdesc) {
1447 dbg_hid("couldn't allocate rdesc memory (post_reset)\n");
1448 return 1;
1449 }
1450 status = hid_get_class_descriptor(dev,
1451 interface->desc.bInterfaceNumber,
1452 HID_DT_REPORT, rdesc, hid->dev_rsize);
1453 if (status < 0) {
1454 dbg_hid("reading report descriptor failed (post_reset)\n");
1455 kfree(rdesc);
1456 return 1;
1457 }
1458 status = memcmp(rdesc, hid->dev_rdesc, hid->dev_rsize);
1459 kfree(rdesc);
1460 if (status != 0) {
1461 dbg_hid("report descriptor changed\n");
1462 return 1;
1463 }
1464
1465 spin_lock_irq(&usbhid->lock);
1466 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1467 spin_unlock_irq(&usbhid->lock);
1468 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1469 status = hid_start_in(hid);
1470 if (status < 0)
1471 hid_io_error(hid);
1472 usbhid_restart_queues(usbhid);
1473
1474 return 0;
1475 }
1476
1477 int usbhid_get_power(struct hid_device *hid)
1478 {
1479 struct usbhid_device *usbhid = hid->driver_data;
1480
1481 return usb_autopm_get_interface(usbhid->intf);
1482 }
1483
1484 void usbhid_put_power(struct hid_device *hid)
1485 {
1486 struct usbhid_device *usbhid = hid->driver_data;
1487
1488 usb_autopm_put_interface(usbhid->intf);
1489 }
1490
1491
1492 #ifdef CONFIG_PM
1493 static int hid_resume_common(struct hid_device *hid, bool driver_suspended)
1494 {
1495 struct usbhid_device *usbhid = hid->driver_data;
1496 int status;
1497
1498 spin_lock_irq(&usbhid->lock);
1499 clear_bit(HID_SUSPENDED, &usbhid->iofl);
1500 usbhid_mark_busy(usbhid);
1501
1502 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1503 test_bit(HID_RESET_PENDING, &usbhid->iofl))
1504 schedule_work(&usbhid->reset_work);
1505 usbhid->retry_delay = 0;
1506
1507 usbhid_restart_queues(usbhid);
1508 spin_unlock_irq(&usbhid->lock);
1509
1510 status = hid_start_in(hid);
1511 if (status < 0)
1512 hid_io_error(hid);
1513
1514 if (driver_suspended && hid->driver && hid->driver->resume)
1515 status = hid->driver->resume(hid);
1516 return status;
1517 }
1518
1519 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1520 {
1521 struct hid_device *hid = usb_get_intfdata(intf);
1522 struct usbhid_device *usbhid = hid->driver_data;
1523 int status = 0;
1524 bool driver_suspended = false;
1525
1526 if (PMSG_IS_AUTO(message)) {
1527 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1528 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1529 && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1530 && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1531 && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1532 && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1533 && (!usbhid->ledcount || ignoreled))
1534 {
1535 set_bit(HID_SUSPENDED, &usbhid->iofl);
1536 spin_unlock_irq(&usbhid->lock);
1537 if (hid->driver && hid->driver->suspend) {
1538 status = hid->driver->suspend(hid, message);
1539 if (status < 0)
1540 goto failed;
1541 }
1542 driver_suspended = true;
1543 } else {
1544 usbhid_mark_busy(usbhid);
1545 spin_unlock_irq(&usbhid->lock);
1546 return -EBUSY;
1547 }
1548
1549 } else {
1550 /* TODO: resume() might need to handle suspend failure */
1551 if (hid->driver && hid->driver->suspend)
1552 status = hid->driver->suspend(hid, message);
1553 driver_suspended = true;
1554 spin_lock_irq(&usbhid->lock);
1555 set_bit(HID_SUSPENDED, &usbhid->iofl);
1556 spin_unlock_irq(&usbhid->lock);
1557 if (usbhid_wait_io(hid) < 0)
1558 status = -EIO;
1559 }
1560
1561 hid_cancel_delayed_stuff(usbhid);
1562 hid_cease_io(usbhid);
1563
1564 if (PMSG_IS_AUTO(message) && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1565 /* lost race against keypresses */
1566 status = -EBUSY;
1567 goto failed;
1568 }
1569 dev_dbg(&intf->dev, "suspend\n");
1570 return status;
1571
1572 failed:
1573 hid_resume_common(hid, driver_suspended);
1574 return status;
1575 }
1576
1577 static int hid_resume(struct usb_interface *intf)
1578 {
1579 struct hid_device *hid = usb_get_intfdata (intf);
1580 struct usbhid_device *usbhid = hid->driver_data;
1581 int status;
1582
1583 if (!test_bit(HID_STARTED, &usbhid->iofl))
1584 return 0;
1585
1586 status = hid_resume_common(hid, true);
1587 dev_dbg(&intf->dev, "resume status %d\n", status);
1588 return 0;
1589 }
1590
1591 static int hid_reset_resume(struct usb_interface *intf)
1592 {
1593 struct hid_device *hid = usb_get_intfdata(intf);
1594 struct usbhid_device *usbhid = hid->driver_data;
1595 int status;
1596
1597 clear_bit(HID_SUSPENDED, &usbhid->iofl);
1598 status = hid_post_reset(intf);
1599 if (status >= 0 && hid->driver && hid->driver->reset_resume) {
1600 int ret = hid->driver->reset_resume(hid);
1601 if (ret < 0)
1602 status = ret;
1603 }
1604 return status;
1605 }
1606
1607 #endif /* CONFIG_PM */
1608
1609 static const struct usb_device_id hid_usb_ids[] = {
1610 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1611 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1612 { } /* Terminating entry */
1613 };
1614
1615 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1616
1617 static struct usb_driver hid_driver = {
1618 .name = "usbhid",
1619 .probe = usbhid_probe,
1620 .disconnect = usbhid_disconnect,
1621 #ifdef CONFIG_PM
1622 .suspend = hid_suspend,
1623 .resume = hid_resume,
1624 .reset_resume = hid_reset_resume,
1625 #endif
1626 .pre_reset = hid_pre_reset,
1627 .post_reset = hid_post_reset,
1628 .id_table = hid_usb_ids,
1629 .supports_autosuspend = 1,
1630 };
1631
1632 struct usb_interface *usbhid_find_interface(int minor)
1633 {
1634 return usb_find_interface(&hid_driver, minor);
1635 }
1636
1637 static int __init hid_init(void)
1638 {
1639 int retval = -ENOMEM;
1640
1641 retval = usbhid_quirks_init(quirks_param);
1642 if (retval)
1643 goto usbhid_quirks_init_fail;
1644 retval = usb_register(&hid_driver);
1645 if (retval)
1646 goto usb_register_fail;
1647 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1648
1649 return 0;
1650 usb_register_fail:
1651 usbhid_quirks_exit();
1652 usbhid_quirks_init_fail:
1653 return retval;
1654 }
1655
1656 static void __exit hid_exit(void)
1657 {
1658 usb_deregister(&hid_driver);
1659 usbhid_quirks_exit();
1660 }
1661
1662 module_init(hid_init);
1663 module_exit(hid_exit);
1664
1665 MODULE_AUTHOR("Andreas Gal");
1666 MODULE_AUTHOR("Vojtech Pavlik");
1667 MODULE_AUTHOR("Jiri Kosina");
1668 MODULE_DESCRIPTION(DRIVER_DESC);
1669 MODULE_LICENSE(DRIVER_LICENSE);
kernel source for telekom puls (alcatel/mediatek)