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ipv6: reallocate addrconf router for ipv6 address when lo device up
[linux/fpc-iii.git] / drivers / hid / usbhid / hid-core.c
blob4bbb883a3dd2f8aa8442c29b9fb09df6d0376b4b
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 int r;
201
202 if (!hid)
203 return 0;
204
205 if ((kicked = (usbhid->outhead != usbhid->outtail))) {
206 dbg("Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
207
208 r = usb_autopm_get_interface_async(usbhid->intf);
209 if (r < 0)
210 return r;
211 /* Asynchronously flush queue. */
212 set_bit(HID_OUT_RUNNING, &usbhid->iofl);
213 if (hid_submit_out(hid)) {
214 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
215 usb_autopm_put_interface_async(usbhid->intf);
216 }
217 wake_up(&usbhid->wait);
218 }
219 return kicked;
220 }
221
222 static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
223 {
224 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
225 int kicked;
226 int r;
227
228 WARN_ON(hid == NULL);
229 if (!hid)
230 return 0;
231
232 if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
233 dbg("Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
234
235 r = usb_autopm_get_interface_async(usbhid->intf);
236 if (r < 0)
237 return r;
238 /* Asynchronously flush queue. */
239 set_bit(HID_CTRL_RUNNING, &usbhid->iofl);
240 if (hid_submit_ctrl(hid)) {
241 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
242 usb_autopm_put_interface_async(usbhid->intf);
243 }
244 wake_up(&usbhid->wait);
245 }
246 return kicked;
247 }
248
249 /*
250 * Input interrupt completion handler.
251 */
252
253 static void hid_irq_in(struct urb *urb)
254 {
255 struct hid_device *hid = urb->context;
256 struct usbhid_device *usbhid = hid->driver_data;
257 int status;
258
259 switch (urb->status) {
260 case 0: /* success */
261 usbhid_mark_busy(usbhid);
262 usbhid->retry_delay = 0;
263 hid_input_report(urb->context, HID_INPUT_REPORT,
264 urb->transfer_buffer,
265 urb->actual_length, 1);
266 /*
267 * autosuspend refused while keys are pressed
268 * because most keyboards don't wake up when
269 * a key is released
270 */
271 if (hid_check_keys_pressed(hid))
272 set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
273 else
274 clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
275 break;
276 case -EPIPE: /* stall */
277 usbhid_mark_busy(usbhid);
278 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
279 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
280 schedule_work(&usbhid->reset_work);
281 return;
282 case -ECONNRESET: /* unlink */
283 case -ENOENT:
284 case -ESHUTDOWN: /* unplug */
285 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
286 return;
287 case -EILSEQ: /* protocol error or unplug */
288 case -EPROTO: /* protocol error or unplug */
289 case -ETIME: /* protocol error or unplug */
290 case -ETIMEDOUT: /* Should never happen, but... */
291 usbhid_mark_busy(usbhid);
292 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
293 hid_io_error(hid);
294 return;
295 default: /* error */
296 hid_warn(urb->dev, "input irq status %d received\n",
297 urb->status);
298 }
299
300 status = usb_submit_urb(urb, GFP_ATOMIC);
301 if (status) {
302 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
303 if (status != -EPERM) {
304 hid_err(hid, "can't resubmit intr, %s-%s/input%d, status %d\n",
305 hid_to_usb_dev(hid)->bus->bus_name,
306 hid_to_usb_dev(hid)->devpath,
307 usbhid->ifnum, status);
308 hid_io_error(hid);
309 }
310 }
311 }
312
313 static int hid_submit_out(struct hid_device *hid)
314 {
315 struct hid_report *report;
316 char *raw_report;
317 struct usbhid_device *usbhid = hid->driver_data;
318 int r;
319
320 report = usbhid->out[usbhid->outtail].report;
321 raw_report = usbhid->out[usbhid->outtail].raw_report;
322
323 usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) +
324 1 + (report->id > 0);
325 usbhid->urbout->dev = hid_to_usb_dev(hid);
326 memcpy(usbhid->outbuf, raw_report,
327 usbhid->urbout->transfer_buffer_length);
328 kfree(raw_report);
329
330 dbg_hid("submitting out urb\n");
331
332 r = usb_submit_urb(usbhid->urbout, GFP_ATOMIC);
333 if (r < 0) {
334 hid_err(hid, "usb_submit_urb(out) failed: %d\n", r);
335 return r;
336 }
337 usbhid->last_out = jiffies;
338 return 0;
339 }
340
341 static int hid_submit_ctrl(struct hid_device *hid)
342 {
343 struct hid_report *report;
344 unsigned char dir;
345 char *raw_report;
346 int len, r;
347 struct usbhid_device *usbhid = hid->driver_data;
348
349 report = usbhid->ctrl[usbhid->ctrltail].report;
350 raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
351 dir = usbhid->ctrl[usbhid->ctrltail].dir;
352
353 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
354 if (dir == USB_DIR_OUT) {
355 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
356 usbhid->urbctrl->transfer_buffer_length = len;
357 memcpy(usbhid->ctrlbuf, raw_report, len);
358 kfree(raw_report);
359 } else {
360 int maxpacket, padlen;
361
362 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
363 maxpacket = usb_maxpacket(hid_to_usb_dev(hid),
364 usbhid->urbctrl->pipe, 0);
365 if (maxpacket > 0) {
366 padlen = DIV_ROUND_UP(len, maxpacket);
367 padlen *= maxpacket;
368 if (padlen > usbhid->bufsize)
369 padlen = usbhid->bufsize;
370 } else
371 padlen = 0;
372 usbhid->urbctrl->transfer_buffer_length = padlen;
373 }
374 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
375
376 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
377 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT :
378 HID_REQ_GET_REPORT;
379 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) |
380 report->id);
381 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
382 usbhid->cr->wLength = cpu_to_le16(len);
383
384 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
385 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" :
386 "Get_Report",
387 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
388
389 r = usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC);
390 if (r < 0) {
391 hid_err(hid, "usb_submit_urb(ctrl) failed: %d\n", r);
392 return r;
393 }
394 usbhid->last_ctrl = jiffies;
395 return 0;
396 }
397
398 /*
399 * Output interrupt completion handler.
400 */
401
402 static int irq_out_pump_restart(struct hid_device *hid)
403 {
404 struct usbhid_device *usbhid = hid->driver_data;
405
406 if (usbhid->outhead != usbhid->outtail)
407 return hid_submit_out(hid);
408 else
409 return -1;
410 }
411
412 static void hid_irq_out(struct urb *urb)
413 {
414 struct hid_device *hid = urb->context;
415 struct usbhid_device *usbhid = hid->driver_data;
416 unsigned long flags;
417 int unplug = 0;
418
419 switch (urb->status) {
420 case 0: /* success */
421 break;
422 case -ESHUTDOWN: /* unplug */
423 unplug = 1;
424 case -EILSEQ: /* protocol error or unplug */
425 case -EPROTO: /* protocol error or unplug */
426 case -ECONNRESET: /* unlink */
427 case -ENOENT:
428 break;
429 default: /* error */
430 hid_warn(urb->dev, "output irq status %d received\n",
431 urb->status);
432 }
433
434 spin_lock_irqsave(&usbhid->lock, flags);
435
436 if (unplug)
437 usbhid->outtail = usbhid->outhead;
438 else
439 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
440
441 if (!irq_out_pump_restart(hid)) {
442 /* Successfully submitted next urb in queue */
443 spin_unlock_irqrestore(&usbhid->lock, flags);
444 return;
445 }
446
447 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
448 spin_unlock_irqrestore(&usbhid->lock, flags);
449 usb_autopm_put_interface_async(usbhid->intf);
450 wake_up(&usbhid->wait);
451 }
452
453 /*
454 * Control pipe completion handler.
455 */
456 static int ctrl_pump_restart(struct hid_device *hid)
457 {
458 struct usbhid_device *usbhid = hid->driver_data;
459
460 if (usbhid->ctrlhead != usbhid->ctrltail)
461 return hid_submit_ctrl(hid);
462 else
463 return -1;
464 }
465
466 static void hid_ctrl(struct urb *urb)
467 {
468 struct hid_device *hid = urb->context;
469 struct usbhid_device *usbhid = hid->driver_data;
470 int unplug = 0, status = urb->status;
471
472 spin_lock(&usbhid->lock);
473
474 switch (status) {
475 case 0: /* success */
476 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
477 hid_input_report(urb->context,
478 usbhid->ctrl[usbhid->ctrltail].report->type,
479 urb->transfer_buffer, urb->actual_length, 0);
480 break;
481 case -ESHUTDOWN: /* unplug */
482 unplug = 1;
483 case -EILSEQ: /* protocol error or unplug */
484 case -EPROTO: /* protocol error or unplug */
485 case -ECONNRESET: /* unlink */
486 case -ENOENT:
487 case -EPIPE: /* report not available */
488 break;
489 default: /* error */
490 hid_warn(urb->dev, "ctrl urb status %d received\n", status);
491 }
492
493 if (unplug)
494 usbhid->ctrltail = usbhid->ctrlhead;
495 else
496 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
497
498 if (!ctrl_pump_restart(hid)) {
499 /* Successfully submitted next urb in queue */
500 spin_unlock(&usbhid->lock);
501 return;
502 }
503
504 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
505 spin_unlock(&usbhid->lock);
506 usb_autopm_put_interface_async(usbhid->intf);
507 wake_up(&usbhid->wait);
508 }
509
510 static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
511 unsigned char dir)
512 {
513 int head;
514 struct usbhid_device *usbhid = hid->driver_data;
515 int len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
516
517 if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
518 return;
519
520 if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
521 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
522 hid_warn(hid, "output queue full\n");
523 return;
524 }
525
526 usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC);
527 if (!usbhid->out[usbhid->outhead].raw_report) {
528 hid_warn(hid, "output queueing failed\n");
529 return;
530 }
531 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
532 usbhid->out[usbhid->outhead].report = report;
533 usbhid->outhead = head;
534
535 /* Try to awake from autosuspend... */
536 if (usb_autopm_get_interface_async(usbhid->intf) < 0)
537 return;
538
539 /*
540 * But if still suspended, leave urb enqueued, don't submit.
541 * Submission will occur if/when resume() drains the queue.
542 */
543 if (test_bit(HID_REPORTED_IDLE, &usbhid->iofl))
544 return;
545
546 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl)) {
547 if (hid_submit_out(hid)) {
548 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
549 usb_autopm_put_interface_async(usbhid->intf);
550 }
551 wake_up(&usbhid->wait);
552 } else {
553 /*
554 * the queue is known to run
555 * but an earlier request may be stuck
556 * we may need to time out
557 * no race because the URB is blocked under
558 * spinlock
559 */
560 if (time_after(jiffies, usbhid->last_out + HZ * 5)) {
561 usb_block_urb(usbhid->urbout);
562 /* drop lock to not deadlock if the callback is called */
563 spin_unlock(&usbhid->lock);
564 usb_unlink_urb(usbhid->urbout);
565 spin_lock(&usbhid->lock);
566 usb_unblock_urb(usbhid->urbout);
567 /*
568 * if the unlinking has already completed
569 * the pump will have been stopped
570 * it must be restarted now
571 */
572 if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl))
573 if (!irq_out_pump_restart(hid))
574 set_bit(HID_OUT_RUNNING, &usbhid->iofl);
575
576
577 }
578 }
579 return;
580 }
581
582 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
583 hid_warn(hid, "control queue full\n");
584 return;
585 }
586
587 if (dir == USB_DIR_OUT) {
588 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC);
589 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
590 hid_warn(hid, "control queueing failed\n");
591 return;
592 }
593 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
594 }
595 usbhid->ctrl[usbhid->ctrlhead].report = report;
596 usbhid->ctrl[usbhid->ctrlhead].dir = dir;
597 usbhid->ctrlhead = head;
598
599 /* Try to awake from autosuspend... */
600 if (usb_autopm_get_interface_async(usbhid->intf) < 0)
601 return;
602
603 /*
604 * If already suspended, leave urb enqueued, but don't submit.
605 * Submission will occur if/when resume() drains the queue.
606 */
607 if (test_bit(HID_REPORTED_IDLE, &usbhid->iofl))
608 return;
609
610 if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl)) {
611 if (hid_submit_ctrl(hid)) {
612 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
613 usb_autopm_put_interface_async(usbhid->intf);
614 }
615 wake_up(&usbhid->wait);
616 } else {
617 /*
618 * the queue is known to run
619 * but an earlier request may be stuck
620 * we may need to time out
621 * no race because the URB is blocked under
622 * spinlock
623 */
624 if (time_after(jiffies, usbhid->last_ctrl + HZ * 5)) {
625 usb_block_urb(usbhid->urbctrl);
626 /* drop lock to not deadlock if the callback is called */
627 spin_unlock(&usbhid->lock);
628 usb_unlink_urb(usbhid->urbctrl);
629 spin_lock(&usbhid->lock);
630 usb_unblock_urb(usbhid->urbctrl);
631 /*
632 * if the unlinking has already completed
633 * the pump will have been stopped
634 * it must be restarted now
635 */
636 if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
637 if (!ctrl_pump_restart(hid))
638 set_bit(HID_CTRL_RUNNING, &usbhid->iofl);
639 }
640 }
641 }
642
643 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
644 {
645 struct usbhid_device *usbhid = hid->driver_data;
646 unsigned long flags;
647
648 spin_lock_irqsave(&usbhid->lock, flags);
649 __usbhid_submit_report(hid, report, dir);
650 spin_unlock_irqrestore(&usbhid->lock, flags);
651 }
652 EXPORT_SYMBOL_GPL(usbhid_submit_report);
653
654 /* Workqueue routine to send requests to change LEDs */
655 static void hid_led(struct work_struct *work)
656 {
657 struct usbhid_device *usbhid =
658 container_of(work, struct usbhid_device, led_work);
659 struct hid_device *hid = usbhid->hid;
660 struct hid_field *field;
661 unsigned long flags;
662
663 field = hidinput_get_led_field(hid);
664 if (!field) {
665 hid_warn(hid, "LED event field not found\n");
666 return;
667 }
668
669 spin_lock_irqsave(&usbhid->lock, flags);
670 if (!test_bit(HID_DISCONNECTED, &usbhid->iofl)) {
671 usbhid->ledcount = hidinput_count_leds(hid);
672 hid_dbg(usbhid->hid, "New ledcount = %u\n", usbhid->ledcount);
673 __usbhid_submit_report(hid, field->report, USB_DIR_OUT);
674 }
675 spin_unlock_irqrestore(&usbhid->lock, flags);
676 }
677
678 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
679 {
680 struct hid_device *hid = input_get_drvdata(dev);
681 struct usbhid_device *usbhid = hid->driver_data;
682 struct hid_field *field;
683 unsigned long flags;
684 int offset;
685
686 if (type == EV_FF)
687 return input_ff_event(dev, type, code, value);
688
689 if (type != EV_LED)
690 return -1;
691
692 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
693 hid_warn(dev, "event field not found\n");
694 return -1;
695 }
696
697 spin_lock_irqsave(&usbhid->lock, flags);
698 hid_set_field(field, offset, value);
699 spin_unlock_irqrestore(&usbhid->lock, flags);
700
701 /*
702 * Defer performing requested LED action.
703 * This is more likely gather all LED changes into a single URB.
704 */
705 schedule_work(&usbhid->led_work);
706
707 return 0;
708 }
709
710 int usbhid_wait_io(struct hid_device *hid)
711 {
712 struct usbhid_device *usbhid = hid->driver_data;
713
714 if (!wait_event_timeout(usbhid->wait,
715 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
716 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
717 10*HZ)) {
718 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
719 return -1;
720 }
721
722 return 0;
723 }
724 EXPORT_SYMBOL_GPL(usbhid_wait_io);
725
726 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
727 {
728 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
729 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
730 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
731 }
732
733 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
734 unsigned char type, void *buf, int size)
735 {
736 int result, retries = 4;
737
738 memset(buf, 0, size);
739
740 do {
741 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
742 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
743 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
744 retries--;
745 } while (result < size && retries);
746 return result;
747 }
748
749 int usbhid_open(struct hid_device *hid)
750 {
751 struct usbhid_device *usbhid = hid->driver_data;
752 int res;
753
754 mutex_lock(&hid_open_mut);
755 if (!hid->open++) {
756 res = usb_autopm_get_interface(usbhid->intf);
757 /* the device must be awake to reliably request remote wakeup */
758 if (res < 0) {
759 hid->open--;
760 mutex_unlock(&hid_open_mut);
761 return -EIO;
762 }
763 usbhid->intf->needs_remote_wakeup = 1;
764 if (hid_start_in(hid))
765 hid_io_error(hid);
766
767 usb_autopm_put_interface(usbhid->intf);
768 }
769 mutex_unlock(&hid_open_mut);
770 return 0;
771 }
772
773 void usbhid_close(struct hid_device *hid)
774 {
775 struct usbhid_device *usbhid = hid->driver_data;
776
777 mutex_lock(&hid_open_mut);
778
779 /* protecting hid->open to make sure we don't restart
780 * data acquistion due to a resumption we no longer
781 * care about
782 */
783 spin_lock_irq(&usbhid->lock);
784 if (!--hid->open) {
785 spin_unlock_irq(&usbhid->lock);
786 hid_cancel_delayed_stuff(usbhid);
787 usb_kill_urb(usbhid->urbin);
788 usbhid->intf->needs_remote_wakeup = 0;
789 } else {
790 spin_unlock_irq(&usbhid->lock);
791 }
792 mutex_unlock(&hid_open_mut);
793 }
794
795 /*
796 * Initialize all reports
797 */
798
799 void usbhid_init_reports(struct hid_device *hid)
800 {
801 struct hid_report *report;
802 struct usbhid_device *usbhid = hid->driver_data;
803 int err, ret;
804
805 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
806 usbhid_submit_report(hid, report, USB_DIR_IN);
807
808 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
809 usbhid_submit_report(hid, report, USB_DIR_IN);
810
811 err = 0;
812 ret = usbhid_wait_io(hid);
813 while (ret) {
814 err |= ret;
815 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
816 usb_kill_urb(usbhid->urbctrl);
817 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
818 usb_kill_urb(usbhid->urbout);
819 ret = usbhid_wait_io(hid);
820 }
821
822 if (err)
823 hid_warn(hid, "timeout initializing reports\n");
824 }
825
826 /*
827 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
828 */
829 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
830 unsigned int hid_code, struct hid_field **pfield)
831 {
832 struct hid_report *report;
833 struct hid_field *field;
834 struct hid_usage *usage;
835 int i, j;
836
837 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
838 for (i = 0; i < report->maxfield; i++) {
839 field = report->field[i];
840 for (j = 0; j < field->maxusage; j++) {
841 usage = &field->usage[j];
842 if ((usage->hid & HID_USAGE_PAGE) == page &&
843 (usage->hid & 0xFFFF) == hid_code) {
844 *pfield = field;
845 return j;
846 }
847 }
848 }
849 }
850 return -1;
851 }
852
853 void usbhid_set_leds(struct hid_device *hid)
854 {
855 struct hid_field *field;
856 int offset;
857
858 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
859 hid_set_field(field, offset, 0);
860 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
861 }
862 }
863 EXPORT_SYMBOL_GPL(usbhid_set_leds);
864
865 /*
866 * Traverse the supplied list of reports and find the longest
867 */
868 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
869 unsigned int *max)
870 {
871 struct hid_report *report;
872 unsigned int size;
873
874 list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
875 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
876 if (*max < size)
877 *max = size;
878 }
879 }
880
881 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
882 {
883 struct usbhid_device *usbhid = hid->driver_data;
884
885 usbhid->inbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
886 &usbhid->inbuf_dma);
887 usbhid->outbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
888 &usbhid->outbuf_dma);
889 usbhid->cr = kmalloc(sizeof(*usbhid->cr), GFP_KERNEL);
890 usbhid->ctrlbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
891 &usbhid->ctrlbuf_dma);
892 if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
893 !usbhid->ctrlbuf)
894 return -1;
895
896 return 0;
897 }
898
899 static int usbhid_get_raw_report(struct hid_device *hid,
900 unsigned char report_number, __u8 *buf, size_t count,
901 unsigned char report_type)
902 {
903 struct usbhid_device *usbhid = hid->driver_data;
904 struct usb_device *dev = hid_to_usb_dev(hid);
905 struct usb_interface *intf = usbhid->intf;
906 struct usb_host_interface *interface = intf->cur_altsetting;
907 int skipped_report_id = 0;
908 int ret;
909
910 /* Byte 0 is the report number. Report data starts at byte 1.*/
911 buf[0] = report_number;
912 if (report_number == 0x0) {
913 /* Offset the return buffer by 1, so that the report ID
914 will remain in byte 0. */
915 buf++;
916 count--;
917 skipped_report_id = 1;
918 }
919 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
920 HID_REQ_GET_REPORT,
921 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
922 ((report_type + 1) << 8) | report_number,
923 interface->desc.bInterfaceNumber, buf, count,
924 USB_CTRL_SET_TIMEOUT);
925
926 /* count also the report id */
927 if (ret > 0 && skipped_report_id)
928 ret++;
929
930 return ret;
931 }
932
933 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count,
934 unsigned char report_type)
935 {
936 struct usbhid_device *usbhid = hid->driver_data;
937 struct usb_device *dev = hid_to_usb_dev(hid);
938 struct usb_interface *intf = usbhid->intf;
939 struct usb_host_interface *interface = intf->cur_altsetting;
940 int ret;
941
942 if (usbhid->urbout && report_type != HID_FEATURE_REPORT) {
943 int actual_length;
944 int skipped_report_id = 0;
945
946 if (buf[0] == 0x0) {
947 /* Don't send the Report ID */
948 buf++;
949 count--;
950 skipped_report_id = 1;
951 }
952 ret = usb_interrupt_msg(dev, usbhid->urbout->pipe,
953 buf, count, &actual_length,
954 USB_CTRL_SET_TIMEOUT);
955 /* return the number of bytes transferred */
956 if (ret == 0) {
957 ret = actual_length;
958 /* count also the report id */
959 if (skipped_report_id)
960 ret++;
961 }
962 } else {
963 int skipped_report_id = 0;
964 int report_id = buf[0];
965 if (buf[0] == 0x0) {
966 /* Don't send the Report ID */
967 buf++;
968 count--;
969 skipped_report_id = 1;
970 }
971 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
972 HID_REQ_SET_REPORT,
973 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
974 ((report_type + 1) << 8) | report_id,
975 interface->desc.bInterfaceNumber, buf, count,
976 USB_CTRL_SET_TIMEOUT);
977 /* count also the report id, if this was a numbered report. */
978 if (ret > 0 && skipped_report_id)
979 ret++;
980 }
981
982 return ret;
983 }
984
985 static void usbhid_restart_queues(struct usbhid_device *usbhid)
986 {
987 if (usbhid->urbout)
988 usbhid_restart_out_queue(usbhid);
989 usbhid_restart_ctrl_queue(usbhid);
990 }
991
992 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
993 {
994 struct usbhid_device *usbhid = hid->driver_data;
995
996 usb_free_coherent(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
997 usb_free_coherent(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
998 kfree(usbhid->cr);
999 usb_free_coherent(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
1000 }
1001
1002 static int usbhid_parse(struct hid_device *hid)
1003 {
1004 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
1005 struct usb_host_interface *interface = intf->cur_altsetting;
1006 struct usb_device *dev = interface_to_usbdev (intf);
1007 struct hid_descriptor *hdesc;
1008 u32 quirks = 0;
1009 unsigned int rsize = 0;
1010 char *rdesc;
1011 int ret, n;
1012
1013 quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
1014 le16_to_cpu(dev->descriptor.idProduct));
1015
1016 if (quirks & HID_QUIRK_IGNORE)
1017 return -ENODEV;
1018
1019 /* Many keyboards and mice don't like to be polled for reports,
1020 * so we will always set the HID_QUIRK_NOGET flag for them. */
1021 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
1022 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
1023 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
1024 quirks |= HID_QUIRK_NOGET;
1025 }
1026
1027 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
1028 (!interface->desc.bNumEndpoints ||
1029 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
1030 dbg_hid("class descriptor not present\n");
1031 return -ENODEV;
1032 }
1033
1034 hid->version = le16_to_cpu(hdesc->bcdHID);
1035 hid->country = hdesc->bCountryCode;
1036
1037 for (n = 0; n < hdesc->bNumDescriptors; n++)
1038 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
1039 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
1040
1041 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
1042 dbg_hid("weird size of report descriptor (%u)\n", rsize);
1043 return -EINVAL;
1044 }
1045
1046 if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
1047 dbg_hid("couldn't allocate rdesc memory\n");
1048 return -ENOMEM;
1049 }
1050
1051 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
1052
1053 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
1054 HID_DT_REPORT, rdesc, rsize);
1055 if (ret < 0) {
1056 dbg_hid("reading report descriptor failed\n");
1057 kfree(rdesc);
1058 goto err;
1059 }
1060
1061 ret = hid_parse_report(hid, rdesc, rsize);
1062 kfree(rdesc);
1063 if (ret) {
1064 dbg_hid("parsing report descriptor failed\n");
1065 goto err;
1066 }
1067
1068 hid->quirks |= quirks;
1069
1070 return 0;
1071 err:
1072 return ret;
1073 }
1074
1075 static int usbhid_start(struct hid_device *hid)
1076 {
1077 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
1078 struct usb_host_interface *interface = intf->cur_altsetting;
1079 struct usb_device *dev = interface_to_usbdev(intf);
1080 struct usbhid_device *usbhid = hid->driver_data;
1081 unsigned int n, insize = 0;
1082 int ret;
1083
1084 clear_bit(HID_DISCONNECTED, &usbhid->iofl);
1085
1086 usbhid->bufsize = HID_MIN_BUFFER_SIZE;
1087 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
1088 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
1089 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
1090
1091 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
1092 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
1093
1094 hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
1095
1096 if (insize > HID_MAX_BUFFER_SIZE)
1097 insize = HID_MAX_BUFFER_SIZE;
1098
1099 if (hid_alloc_buffers(dev, hid)) {
1100 ret = -ENOMEM;
1101 goto fail;
1102 }
1103
1104 for (n = 0; n < interface->desc.bNumEndpoints; n++) {
1105 struct usb_endpoint_descriptor *endpoint;
1106 int pipe;
1107 int interval;
1108
1109 endpoint = &interface->endpoint[n].desc;
1110 if (!usb_endpoint_xfer_int(endpoint))
1111 continue;
1112
1113 interval = endpoint->bInterval;
1114
1115 /* Some vendors give fullspeed interval on highspeed devides */
1116 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
1117 dev->speed == USB_SPEED_HIGH) {
1118 interval = fls(endpoint->bInterval*8);
1119 printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
1120 hid->name, endpoint->bInterval, interval);
1121 }
1122
1123 /* Change the polling interval of mice. */
1124 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
1125 interval = hid_mousepoll_interval;
1126
1127 ret = -ENOMEM;
1128 if (usb_endpoint_dir_in(endpoint)) {
1129 if (usbhid->urbin)
1130 continue;
1131 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
1132 goto fail;
1133 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
1134 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
1135 hid_irq_in, hid, interval);
1136 usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
1137 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1138 } else {
1139 if (usbhid->urbout)
1140 continue;
1141 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
1142 goto fail;
1143 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
1144 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
1145 hid_irq_out, hid, interval);
1146 usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
1147 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1148 }
1149 }
1150
1151 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
1152 if (!usbhid->urbctrl) {
1153 ret = -ENOMEM;
1154 goto fail;
1155 }
1156
1157 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
1158 usbhid->ctrlbuf, 1, hid_ctrl, hid);
1159 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
1160 usbhid->urbctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1161
1162 if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS))
1163 usbhid_init_reports(hid);
1164
1165 set_bit(HID_STARTED, &usbhid->iofl);
1166
1167 /* Some keyboards don't work until their LEDs have been set.
1168 * Since BIOSes do set the LEDs, it must be safe for any device
1169 * that supports the keyboard boot protocol.
1170 * In addition, enable remote wakeup by default for all keyboard
1171 * devices supporting the boot protocol.
1172 */
1173 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1174 interface->desc.bInterfaceProtocol ==
1175 USB_INTERFACE_PROTOCOL_KEYBOARD) {
1176 usbhid_set_leds(hid);
1177 device_set_wakeup_enable(&dev->dev, 1);
1178 }
1179 return 0;
1180
1181 fail:
1182 usb_free_urb(usbhid->urbin);
1183 usb_free_urb(usbhid->urbout);
1184 usb_free_urb(usbhid->urbctrl);
1185 usbhid->urbin = NULL;
1186 usbhid->urbout = NULL;
1187 usbhid->urbctrl = NULL;
1188 hid_free_buffers(dev, hid);
1189 return ret;
1190 }
1191
1192 static void usbhid_stop(struct hid_device *hid)
1193 {
1194 struct usbhid_device *usbhid = hid->driver_data;
1195
1196 if (WARN_ON(!usbhid))
1197 return;
1198
1199 clear_bit(HID_STARTED, &usbhid->iofl);
1200 spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */
1201 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1202 spin_unlock_irq(&usbhid->lock);
1203 usb_kill_urb(usbhid->urbin);
1204 usb_kill_urb(usbhid->urbout);
1205 usb_kill_urb(usbhid->urbctrl);
1206
1207 hid_cancel_delayed_stuff(usbhid);
1208
1209 hid->claimed = 0;
1210
1211 usb_free_urb(usbhid->urbin);
1212 usb_free_urb(usbhid->urbctrl);
1213 usb_free_urb(usbhid->urbout);
1214 usbhid->urbin = NULL; /* don't mess up next start */
1215 usbhid->urbctrl = NULL;
1216 usbhid->urbout = NULL;
1217
1218 hid_free_buffers(hid_to_usb_dev(hid), hid);
1219 }
1220
1221 static int usbhid_power(struct hid_device *hid, int lvl)
1222 {
1223 int r = 0;
1224
1225 switch (lvl) {
1226 case PM_HINT_FULLON:
1227 r = usbhid_get_power(hid);
1228 break;
1229 case PM_HINT_NORMAL:
1230 usbhid_put_power(hid);
1231 break;
1232 }
1233 return r;
1234 }
1235
1236 static struct hid_ll_driver usb_hid_driver = {
1237 .parse = usbhid_parse,
1238 .start = usbhid_start,
1239 .stop = usbhid_stop,
1240 .open = usbhid_open,
1241 .close = usbhid_close,
1242 .power = usbhid_power,
1243 .hidinput_input_event = usb_hidinput_input_event,
1244 };
1245
1246 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1247 {
1248 struct usb_host_interface *interface = intf->cur_altsetting;
1249 struct usb_device *dev = interface_to_usbdev(intf);
1250 struct usbhid_device *usbhid;
1251 struct hid_device *hid;
1252 unsigned int n, has_in = 0;
1253 size_t len;
1254 int ret;
1255
1256 dbg_hid("HID probe called for ifnum %d\n",
1257 intf->altsetting->desc.bInterfaceNumber);
1258
1259 for (n = 0; n < interface->desc.bNumEndpoints; n++)
1260 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1261 has_in++;
1262 if (!has_in) {
1263 hid_err(intf, "couldn't find an input interrupt endpoint\n");
1264 return -ENODEV;
1265 }
1266
1267 hid = hid_allocate_device();
1268 if (IS_ERR(hid))
1269 return PTR_ERR(hid);
1270
1271 usb_set_intfdata(intf, hid);
1272 hid->ll_driver = &usb_hid_driver;
1273 hid->hid_get_raw_report = usbhid_get_raw_report;
1274 hid->hid_output_raw_report = usbhid_output_raw_report;
1275 hid->ff_init = hid_pidff_init;
1276 #ifdef CONFIG_USB_HIDDEV
1277 hid->hiddev_connect = hiddev_connect;
1278 hid->hiddev_disconnect = hiddev_disconnect;
1279 hid->hiddev_hid_event = hiddev_hid_event;
1280 hid->hiddev_report_event = hiddev_report_event;
1281 #endif
1282 hid->dev.parent = &intf->dev;
1283 hid->bus = BUS_USB;
1284 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1285 hid->product = le16_to_cpu(dev->descriptor.idProduct);
1286 hid->name[0] = 0;
1287 hid->quirks = usbhid_lookup_quirk(hid->vendor, hid->product);
1288 if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1289 USB_INTERFACE_PROTOCOL_MOUSE)
1290 hid->type = HID_TYPE_USBMOUSE;
1291 else if (intf->cur_altsetting->desc.bInterfaceProtocol == 0)
1292 hid->type = HID_TYPE_USBNONE;
1293
1294 if (dev->manufacturer)
1295 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1296
1297 if (dev->product) {
1298 if (dev->manufacturer)
1299 strlcat(hid->name, " ", sizeof(hid->name));
1300 strlcat(hid->name, dev->product, sizeof(hid->name));
1301 }
1302
1303 if (!strlen(hid->name))
1304 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1305 le16_to_cpu(dev->descriptor.idVendor),
1306 le16_to_cpu(dev->descriptor.idProduct));
1307
1308 usb_make_path(dev, hid->phys, sizeof(hid->phys));
1309 strlcat(hid->phys, "/input", sizeof(hid->phys));
1310 len = strlen(hid->phys);
1311 if (len < sizeof(hid->phys) - 1)
1312 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1313 "%d", intf->altsetting[0].desc.bInterfaceNumber);
1314
1315 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1316 hid->uniq[0] = 0;
1317
1318 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1319 if (usbhid == NULL) {
1320 ret = -ENOMEM;
1321 goto err;
1322 }
1323
1324 hid->driver_data = usbhid;
1325 usbhid->hid = hid;
1326 usbhid->intf = intf;
1327 usbhid->ifnum = interface->desc.bInterfaceNumber;
1328
1329 init_waitqueue_head(&usbhid->wait);
1330 INIT_WORK(&usbhid->reset_work, hid_reset);
1331 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
1332 spin_lock_init(&usbhid->lock);
1333
1334 INIT_WORK(&usbhid->led_work, hid_led);
1335
1336 ret = hid_add_device(hid);
1337 if (ret) {
1338 if (ret != -ENODEV)
1339 hid_err(intf, "can't add hid device: %d\n", ret);
1340 goto err_free;
1341 }
1342
1343 return 0;
1344 err_free:
1345 kfree(usbhid);
1346 err:
1347 hid_destroy_device(hid);
1348 return ret;
1349 }
1350
1351 static void usbhid_disconnect(struct usb_interface *intf)
1352 {
1353 struct hid_device *hid = usb_get_intfdata(intf);
1354 struct usbhid_device *usbhid;
1355
1356 if (WARN_ON(!hid))
1357 return;
1358
1359 usbhid = hid->driver_data;
1360 hid_destroy_device(hid);
1361 kfree(usbhid);
1362 }
1363
1364 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1365 {
1366 del_timer_sync(&usbhid->io_retry);
1367 cancel_work_sync(&usbhid->reset_work);
1368 cancel_work_sync(&usbhid->led_work);
1369 }
1370
1371 static void hid_cease_io(struct usbhid_device *usbhid)
1372 {
1373 del_timer_sync(&usbhid->io_retry);
1374 usb_kill_urb(usbhid->urbin);
1375 usb_kill_urb(usbhid->urbctrl);
1376 usb_kill_urb(usbhid->urbout);
1377 }
1378
1379 /* Treat USB reset pretty much the same as suspend/resume */
1380 static int hid_pre_reset(struct usb_interface *intf)
1381 {
1382 struct hid_device *hid = usb_get_intfdata(intf);
1383 struct usbhid_device *usbhid = hid->driver_data;
1384
1385 spin_lock_irq(&usbhid->lock);
1386 set_bit(HID_RESET_PENDING, &usbhid->iofl);
1387 spin_unlock_irq(&usbhid->lock);
1388 hid_cease_io(usbhid);
1389
1390 return 0;
1391 }
1392
1393 /* Same routine used for post_reset and reset_resume */
1394 static int hid_post_reset(struct usb_interface *intf)
1395 {
1396 struct usb_device *dev = interface_to_usbdev (intf);
1397 struct hid_device *hid = usb_get_intfdata(intf);
1398 struct usbhid_device *usbhid = hid->driver_data;
1399 int status;
1400
1401 spin_lock_irq(&usbhid->lock);
1402 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1403 spin_unlock_irq(&usbhid->lock);
1404 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1405 status = hid_start_in(hid);
1406 if (status < 0)
1407 hid_io_error(hid);
1408 usbhid_restart_queues(usbhid);
1409
1410 return 0;
1411 }
1412
1413 int usbhid_get_power(struct hid_device *hid)
1414 {
1415 struct usbhid_device *usbhid = hid->driver_data;
1416
1417 return usb_autopm_get_interface(usbhid->intf);
1418 }
1419
1420 void usbhid_put_power(struct hid_device *hid)
1421 {
1422 struct usbhid_device *usbhid = hid->driver_data;
1423
1424 usb_autopm_put_interface(usbhid->intf);
1425 }
1426
1427
1428 #ifdef CONFIG_PM
1429 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1430 {
1431 struct hid_device *hid = usb_get_intfdata(intf);
1432 struct usbhid_device *usbhid = hid->driver_data;
1433 int status;
1434
1435 if (PMSG_IS_AUTO(message)) {
1436 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1437 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1438 && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1439 && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1440 && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1441 && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1442 && (!usbhid->ledcount || ignoreled))
1443 {
1444 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1445 spin_unlock_irq(&usbhid->lock);
1446 if (hid->driver && hid->driver->suspend) {
1447 status = hid->driver->suspend(hid, message);
1448 if (status < 0)
1449 return status;
1450 }
1451 } else {
1452 usbhid_mark_busy(usbhid);
1453 spin_unlock_irq(&usbhid->lock);
1454 return -EBUSY;
1455 }
1456
1457 } else {
1458 if (hid->driver && hid->driver->suspend) {
1459 status = hid->driver->suspend(hid, message);
1460 if (status < 0)
1461 return status;
1462 }
1463 spin_lock_irq(&usbhid->lock);
1464 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1465 spin_unlock_irq(&usbhid->lock);
1466 if (usbhid_wait_io(hid) < 0)
1467 return -EIO;
1468 }
1469
1470 hid_cancel_delayed_stuff(usbhid);
1471 hid_cease_io(usbhid);
1472
1473 if (PMSG_IS_AUTO(message) && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1474 /* lost race against keypresses */
1475 status = hid_start_in(hid);
1476 if (status < 0)
1477 hid_io_error(hid);
1478 usbhid_mark_busy(usbhid);
1479 return -EBUSY;
1480 }
1481 dev_dbg(&intf->dev, "suspend\n");
1482 return 0;
1483 }
1484
1485 static int hid_resume(struct usb_interface *intf)
1486 {
1487 struct hid_device *hid = usb_get_intfdata (intf);
1488 struct usbhid_device *usbhid = hid->driver_data;
1489 int status;
1490
1491 if (!test_bit(HID_STARTED, &usbhid->iofl))
1492 return 0;
1493
1494 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1495 usbhid_mark_busy(usbhid);
1496
1497 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1498 test_bit(HID_RESET_PENDING, &usbhid->iofl))
1499 schedule_work(&usbhid->reset_work);
1500 usbhid->retry_delay = 0;
1501 status = hid_start_in(hid);
1502 if (status < 0)
1503 hid_io_error(hid);
1504 usbhid_restart_queues(usbhid);
1505
1506 if (status >= 0 && hid->driver && hid->driver->resume) {
1507 int ret = hid->driver->resume(hid);
1508 if (ret < 0)
1509 status = ret;
1510 }
1511 dev_dbg(&intf->dev, "resume status %d\n", status);
1512 return 0;
1513 }
1514
1515 static int hid_reset_resume(struct usb_interface *intf)
1516 {
1517 struct hid_device *hid = usb_get_intfdata(intf);
1518 struct usbhid_device *usbhid = hid->driver_data;
1519 int status;
1520
1521 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1522 status = hid_post_reset(intf);
1523 if (status >= 0 && hid->driver && hid->driver->reset_resume) {
1524 int ret = hid->driver->reset_resume(hid);
1525 if (ret < 0)
1526 status = ret;
1527 }
1528 return status;
1529 }
1530
1531 #endif /* CONFIG_PM */
1532
1533 static const struct usb_device_id hid_usb_ids[] = {
1534 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1535 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1536 { } /* Terminating entry */
1537 };
1538
1539 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1540
1541 static struct usb_driver hid_driver = {
1542 .name = "usbhid",
1543 .probe = usbhid_probe,
1544 .disconnect = usbhid_disconnect,
1545 #ifdef CONFIG_PM
1546 .suspend = hid_suspend,
1547 .resume = hid_resume,
1548 .reset_resume = hid_reset_resume,
1549 #endif
1550 .pre_reset = hid_pre_reset,
1551 .post_reset = hid_post_reset,
1552 .id_table = hid_usb_ids,
1553 .supports_autosuspend = 1,
1554 };
1555
1556 static const struct hid_device_id hid_usb_table[] = {
1557 { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1558 { }
1559 };
1560
1561 struct usb_interface *usbhid_find_interface(int minor)
1562 {
1563 return usb_find_interface(&hid_driver, minor);
1564 }
1565
1566 static struct hid_driver hid_usb_driver = {
1567 .name = "generic-usb",
1568 .id_table = hid_usb_table,
1569 };
1570
1571 static int __init hid_init(void)
1572 {
1573 int retval = -ENOMEM;
1574
1575 retval = hid_register_driver(&hid_usb_driver);
1576 if (retval)
1577 goto hid_register_fail;
1578 retval = usbhid_quirks_init(quirks_param);
1579 if (retval)
1580 goto usbhid_quirks_init_fail;
1581 retval = usb_register(&hid_driver);
1582 if (retval)
1583 goto usb_register_fail;
1584 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1585
1586 return 0;
1587 usb_register_fail:
1588 usbhid_quirks_exit();
1589 usbhid_quirks_init_fail:
1590 hid_unregister_driver(&hid_usb_driver);
1591 hid_register_fail:
1592 return retval;
1593 }
1594
1595 static void __exit hid_exit(void)
1596 {
1597 usb_deregister(&hid_driver);
1598 usbhid_quirks_exit();
1599 hid_unregister_driver(&hid_usb_driver);
1600 }
1601
1602 module_init(hid_init);
1603 module_exit(hid_exit);
1604
1605 MODULE_AUTHOR("Andreas Gal");
1606 MODULE_AUTHOR("Vojtech Pavlik");
1607 MODULE_AUTHOR("Jiri Kosina");
1608 MODULE_DESCRIPTION(DRIVER_DESC);
1609 MODULE_LICENSE(DRIVER_LICENSE);
Linux with added FPC-III support