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15#include <linux/module.h>
16#include <linux/slab.h>
17#include <linux/init.h>
18#include <linux/kernel.h>
19#include <linux/list.h>
20#include <linux/mm.h>
21#include <linux/mutex.h>
22#include <linux/spinlock.h>
23#include <asm/unaligned.h>
24#include <asm/byteorder.h>
25#include <linux/input.h>
26#include <linux/wait.h>
27#include <linux/workqueue.h>
28#include <linux/string.h>
29
30#include <linux/usb.h>
31
32#include <linux/hid.h>
33#include <linux/hiddev.h>
34#include <linux/hid-debug.h>
35#include <linux/hidraw.h>
36#include "usbhid.h"
37
38
39
40
41
42#define DRIVER_DESC "USB HID core driver"
43
44
45
46
47
48static unsigned int hid_mousepoll_interval;
49module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
50MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
51
52static unsigned int hid_jspoll_interval;
53module_param_named(jspoll, hid_jspoll_interval, uint, 0644);
54MODULE_PARM_DESC(jspoll, "Polling interval of joysticks");
55
56static unsigned int hid_kbpoll_interval;
57module_param_named(kbpoll, hid_kbpoll_interval, uint, 0644);
58MODULE_PARM_DESC(kbpoll, "Polling interval of keyboards");
59
60static unsigned int ignoreled;
61module_param_named(ignoreled, ignoreled, uint, 0644);
62MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds");
63
64
65static char *quirks_param[MAX_USBHID_BOOT_QUIRKS];
66module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
67MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
68 " quirks=vendorID:productID:quirks"
69 " where vendorID, productID, and quirks are all in"
70 " 0x-prefixed hex");
71
72
73
74static void hid_io_error(struct hid_device *hid);
75static int hid_submit_out(struct hid_device *hid);
76static int hid_submit_ctrl(struct hid_device *hid);
77static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid);
78
79
80static int hid_start_in(struct hid_device *hid)
81{
82 unsigned long flags;
83 int rc = 0;
84 struct usbhid_device *usbhid = hid->driver_data;
85
86 spin_lock_irqsave(&usbhid->lock, flags);
87 if (test_bit(HID_IN_POLLING, &usbhid->iofl) &&
88 !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
89 !test_bit(HID_SUSPENDED, &usbhid->iofl) &&
90 !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
91 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
92 if (rc != 0) {
93 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
94 if (rc == -ENOSPC)
95 set_bit(HID_NO_BANDWIDTH, &usbhid->iofl);
96 } else {
97 clear_bit(HID_NO_BANDWIDTH, &usbhid->iofl);
98 }
99 }
100 spin_unlock_irqrestore(&usbhid->lock, flags);
101 return rc;
102}
103
104
105static void hid_retry_timeout(struct timer_list *t)
106{
107 struct usbhid_device *usbhid = from_timer(usbhid, t, io_retry);
108 struct hid_device *hid = usbhid->hid;
109
110 dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
111 if (hid_start_in(hid))
112 hid_io_error(hid);
113}
114
115
116static void hid_reset(struct work_struct *work)
117{
118 struct usbhid_device *usbhid =
119 container_of(work, struct usbhid_device, reset_work);
120 struct hid_device *hid = usbhid->hid;
121 int rc;
122
123 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
124 dev_dbg(&usbhid->intf->dev, "clear halt\n");
125 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
126 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
127 if (rc == 0) {
128 hid_start_in(hid);
129 } else {
130 dev_dbg(&usbhid->intf->dev,
131 "clear-halt failed: %d\n", rc);
132 set_bit(HID_RESET_PENDING, &usbhid->iofl);
133 }
134 }
135
136 if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
137 dev_dbg(&usbhid->intf->dev, "resetting device\n");
138 usb_queue_reset_device(usbhid->intf);
139 }
140}
141
142
143static void hid_io_error(struct hid_device *hid)
144{
145 unsigned long flags;
146 struct usbhid_device *usbhid = hid->driver_data;
147
148 spin_lock_irqsave(&usbhid->lock, flags);
149
150
151 if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
152 goto done;
153
154
155
156 if (time_after(jiffies, usbhid->stop_retry + HZ/2))
157 usbhid->retry_delay = 0;
158
159
160 if (usbhid->retry_delay == 0) {
161 usbhid->retry_delay = 13;
162 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
163 } else if (usbhid->retry_delay < 100)
164 usbhid->retry_delay *= 2;
165
166 if (time_after(jiffies, usbhid->stop_retry)) {
167
168
169 if (!test_bit(HID_NO_BANDWIDTH, &usbhid->iofl)
170 && !test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
171
172 schedule_work(&usbhid->reset_work);
173 goto done;
174 }
175 }
176
177 mod_timer(&usbhid->io_retry,
178 jiffies + msecs_to_jiffies(usbhid->retry_delay));
179done:
180 spin_unlock_irqrestore(&usbhid->lock, flags);
181}
182
183static void usbhid_mark_busy(struct usbhid_device *usbhid)
184{
185 struct usb_interface *intf = usbhid->intf;
186
187 usb_mark_last_busy(interface_to_usbdev(intf));
188}
189
190static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
191{
192 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
193 int kicked;
194 int r;
195
196 if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) ||
197 test_bit(HID_SUSPENDED, &usbhid->iofl))
198 return 0;
199
200 if ((kicked = (usbhid->outhead != usbhid->outtail))) {
201 hid_dbg(hid, "Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
202
203
204 r = usb_autopm_get_interface_async(usbhid->intf);
205 if (r < 0)
206 return r;
207
208
209
210
211
212 if (test_bit(HID_SUSPENDED, &usbhid->iofl)) {
213 usb_autopm_put_interface_no_suspend(usbhid->intf);
214 return r;
215 }
216
217
218 set_bit(HID_OUT_RUNNING, &usbhid->iofl);
219 if (hid_submit_out(hid)) {
220 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
221 usb_autopm_put_interface_async(usbhid->intf);
222 }
223 wake_up(&usbhid->wait);
224 }
225 return kicked;
226}
227
228static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
229{
230 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
231 int kicked;
232 int r;
233
234 WARN_ON(hid == NULL);
235 if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) ||
236 test_bit(HID_SUSPENDED, &usbhid->iofl))
237 return 0;
238
239 if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
240 hid_dbg(hid, "Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
241
242
243 r = usb_autopm_get_interface_async(usbhid->intf);
244 if (r < 0)
245 return r;
246
247
248
249
250
251 if (test_bit(HID_SUSPENDED, &usbhid->iofl)) {
252 usb_autopm_put_interface_no_suspend(usbhid->intf);
253 return r;
254 }
255
256
257 set_bit(HID_CTRL_RUNNING, &usbhid->iofl);
258 if (hid_submit_ctrl(hid)) {
259 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
260 usb_autopm_put_interface_async(usbhid->intf);
261 }
262 wake_up(&usbhid->wait);
263 }
264 return kicked;
265}
266
267
268
269
270
271static void hid_irq_in(struct urb *urb)
272{
273 struct hid_device *hid = urb->context;
274 struct usbhid_device *usbhid = hid->driver_data;
275 int status;
276
277 switch (urb->status) {
278 case 0:
279 usbhid->retry_delay = 0;
280 if (!test_bit(HID_OPENED, &usbhid->iofl))
281 break;
282 usbhid_mark_busy(usbhid);
283 if (!test_bit(HID_RESUME_RUNNING, &usbhid->iofl)) {
284 hid_input_report(urb->context, HID_INPUT_REPORT,
285 urb->transfer_buffer,
286 urb->actual_length, 1);
287
288
289
290
291
292 if (hid_check_keys_pressed(hid))
293 set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
294 else
295 clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
296 }
297 break;
298 case -EPIPE:
299 usbhid_mark_busy(usbhid);
300 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
301 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
302 schedule_work(&usbhid->reset_work);
303 return;
304 case -ECONNRESET:
305 case -ENOENT:
306 case -ESHUTDOWN:
307 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
308 return;
309 case -EILSEQ:
310 case -EPROTO:
311 case -ETIME:
312 case -ETIMEDOUT:
313 usbhid_mark_busy(usbhid);
314 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
315 hid_io_error(hid);
316 return;
317 default:
318 hid_warn(urb->dev, "input irq status %d received\n",
319 urb->status);
320 }
321
322 status = usb_submit_urb(urb, GFP_ATOMIC);
323 if (status) {
324 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
325 if (status != -EPERM) {
326 hid_err(hid, "can't resubmit intr, %s-%s/input%d, status %d\n",
327 hid_to_usb_dev(hid)->bus->bus_name,
328 hid_to_usb_dev(hid)->devpath,
329 usbhid->ifnum, status);
330 hid_io_error(hid);
331 }
332 }
333}
334
335static int hid_submit_out(struct hid_device *hid)
336{
337 struct hid_report *report;
338 char *raw_report;
339 struct usbhid_device *usbhid = hid->driver_data;
340 int r;
341
342 report = usbhid->out[usbhid->outtail].report;
343 raw_report = usbhid->out[usbhid->outtail].raw_report;
344
345 usbhid->urbout->transfer_buffer_length = hid_report_len(report);
346 usbhid->urbout->dev = hid_to_usb_dev(hid);
347 if (raw_report) {
348 memcpy(usbhid->outbuf, raw_report,
349 usbhid->urbout->transfer_buffer_length);
350 kfree(raw_report);
351 usbhid->out[usbhid->outtail].raw_report = NULL;
352 }
353
354 dbg_hid("submitting out urb\n");
355
356 r = usb_submit_urb(usbhid->urbout, GFP_ATOMIC);
357 if (r < 0) {
358 hid_err(hid, "usb_submit_urb(out) failed: %d\n", r);
359 return r;
360 }
361 usbhid->last_out = jiffies;
362 return 0;
363}
364
365static int hid_submit_ctrl(struct hid_device *hid)
366{
367 struct hid_report *report;
368 unsigned char dir;
369 char *raw_report;
370 int len, r;
371 struct usbhid_device *usbhid = hid->driver_data;
372
373 report = usbhid->ctrl[usbhid->ctrltail].report;
374 raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
375 dir = usbhid->ctrl[usbhid->ctrltail].dir;
376
377 len = hid_report_len(report);
378 if (dir == USB_DIR_OUT) {
379 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
380 if (raw_report) {
381 memcpy(usbhid->ctrlbuf, raw_report, len);
382 kfree(raw_report);
383 usbhid->ctrl[usbhid->ctrltail].raw_report = NULL;
384 }
385 } else {
386 int maxpacket;
387
388 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
389 maxpacket = usb_maxpacket(hid_to_usb_dev(hid),
390 usbhid->urbctrl->pipe, 0);
391 len += (len == 0);
392 len = round_up(len, maxpacket);
393 if (len > usbhid->bufsize)
394 len = usbhid->bufsize;
395 }
396 usbhid->urbctrl->transfer_buffer_length = len;
397 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
398
399 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
400 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT :
401 HID_REQ_GET_REPORT;
402 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) |
403 report->id);
404 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
405 usbhid->cr->wLength = cpu_to_le16(len);
406
407 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
408 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" :
409 "Get_Report",
410 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
411
412 r = usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC);
413 if (r < 0) {
414 hid_err(hid, "usb_submit_urb(ctrl) failed: %d\n", r);
415 return r;
416 }
417 usbhid->last_ctrl = jiffies;
418 return 0;
419}
420
421
422
423
424
425static void hid_irq_out(struct urb *urb)
426{
427 struct hid_device *hid = urb->context;
428 struct usbhid_device *usbhid = hid->driver_data;
429 unsigned long flags;
430 int unplug = 0;
431
432 switch (urb->status) {
433 case 0:
434 break;
435 case -ESHUTDOWN:
436 unplug = 1;
437 break;
438 case -EILSEQ:
439 case -EPROTO:
440 case -ECONNRESET:
441 case -ENOENT:
442 break;
443 default:
444 hid_warn(urb->dev, "output irq status %d received\n",
445 urb->status);
446 }
447
448 spin_lock_irqsave(&usbhid->lock, flags);
449
450 if (unplug) {
451 usbhid->outtail = usbhid->outhead;
452 } else {
453 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
454
455 if (usbhid->outhead != usbhid->outtail &&
456 hid_submit_out(hid) == 0) {
457
458 spin_unlock_irqrestore(&usbhid->lock, flags);
459 return;
460 }
461 }
462
463 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
464 spin_unlock_irqrestore(&usbhid->lock, flags);
465 usb_autopm_put_interface_async(usbhid->intf);
466 wake_up(&usbhid->wait);
467}
468
469
470
471
472
473static void hid_ctrl(struct urb *urb)
474{
475 struct hid_device *hid = urb->context;
476 struct usbhid_device *usbhid = hid->driver_data;
477 unsigned long flags;
478 int unplug = 0, status = urb->status;
479
480 switch (status) {
481 case 0:
482 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
483 hid_input_report(urb->context,
484 usbhid->ctrl[usbhid->ctrltail].report->type,
485 urb->transfer_buffer, urb->actual_length, 0);
486 break;
487 case -ESHUTDOWN:
488 unplug = 1;
489 break;
490 case -EILSEQ:
491 case -EPROTO:
492 case -ECONNRESET:
493 case -ENOENT:
494 case -EPIPE:
495 break;
496 default:
497 hid_warn(urb->dev, "ctrl urb status %d received\n", status);
498 }
499
500 spin_lock_irqsave(&usbhid->lock, flags);
501
502 if (unplug) {
503 usbhid->ctrltail = usbhid->ctrlhead;
504 } else if (usbhid->ctrlhead != usbhid->ctrltail) {
505 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
506
507 if (usbhid->ctrlhead != usbhid->ctrltail &&
508 hid_submit_ctrl(hid) == 0) {
509
510 spin_unlock_irqrestore(&usbhid->lock, flags);
511 return;
512 }
513 }
514
515 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
516 spin_unlock_irqrestore(&usbhid->lock, flags);
517 usb_autopm_put_interface_async(usbhid->intf);
518 wake_up(&usbhid->wait);
519}
520
521static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
522 unsigned char dir)
523{
524 int head;
525 struct usbhid_device *usbhid = hid->driver_data;
526
527 if (((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN) ||
528 test_bit(HID_DISCONNECTED, &usbhid->iofl))
529 return;
530
531 if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
532 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
533 hid_warn(hid, "output queue full\n");
534 return;
535 }
536
537 usbhid->out[usbhid->outhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC);
538 if (!usbhid->out[usbhid->outhead].raw_report) {
539 hid_warn(hid, "output queueing failed\n");
540 return;
541 }
542 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
543 usbhid->out[usbhid->outhead].report = report;
544 usbhid->outhead = head;
545
546
547 if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl)) {
548 usbhid_restart_out_queue(usbhid);
549
550
551 } else if (time_after(jiffies, usbhid->last_out + HZ * 5)) {
552
553
554 usb_autopm_get_interface_no_resume(usbhid->intf);
555
556
557
558
559
560
561 usb_block_urb(usbhid->urbout);
562
563
564 spin_unlock(&usbhid->lock);
565
566 usb_unlink_urb(usbhid->urbout);
567 spin_lock(&usbhid->lock);
568 usb_unblock_urb(usbhid->urbout);
569
570
571 if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl))
572 usbhid_restart_out_queue(usbhid);
573
574
575 usb_autopm_put_interface_async(usbhid->intf);
576 }
577 return;
578 }
579
580 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
581 hid_warn(hid, "control queue full\n");
582 return;
583 }
584
585 if (dir == USB_DIR_OUT) {
586 usbhid->ctrl[usbhid->ctrlhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC);
587 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
588 hid_warn(hid, "control queueing failed\n");
589 return;
590 }
591 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
592 }
593 usbhid->ctrl[usbhid->ctrlhead].report = report;
594 usbhid->ctrl[usbhid->ctrlhead].dir = dir;
595 usbhid->ctrlhead = head;
596
597
598 if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) {
599 usbhid_restart_ctrl_queue(usbhid);
600
601
602 } else if (time_after(jiffies, usbhid->last_ctrl + HZ * 5)) {
603
604
605 usb_autopm_get_interface_no_resume(usbhid->intf);
606
607
608
609
610
611
612 usb_block_urb(usbhid->urbctrl);
613
614
615 spin_unlock(&usbhid->lock);
616
617 usb_unlink_urb(usbhid->urbctrl);
618 spin_lock(&usbhid->lock);
619 usb_unblock_urb(usbhid->urbctrl);
620
621
622 if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
623 usbhid_restart_ctrl_queue(usbhid);
624
625
626 usb_autopm_put_interface_async(usbhid->intf);
627 }
628}
629
630static void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
631{
632 struct usbhid_device *usbhid = hid->driver_data;
633 unsigned long flags;
634
635 spin_lock_irqsave(&usbhid->lock, flags);
636 __usbhid_submit_report(hid, report, dir);
637 spin_unlock_irqrestore(&usbhid->lock, flags);
638}
639
640static int usbhid_wait_io(struct hid_device *hid)
641{
642 struct usbhid_device *usbhid = hid->driver_data;
643
644 if (!wait_event_timeout(usbhid->wait,
645 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
646 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
647 10*HZ)) {
648 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
649 return -1;
650 }
651
652 return 0;
653}
654
655static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
656{
657 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
658 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
659 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
660}
661
662static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
663 unsigned char type, void *buf, int size)
664{
665 int result, retries = 4;
666
667 memset(buf, 0, size);
668
669 do {
670 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
671 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
672 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
673 retries--;
674 } while (result < size && retries);
675 return result;
676}
677
678static int usbhid_open(struct hid_device *hid)
679{
680 struct usbhid_device *usbhid = hid->driver_data;
681 int res;
682
683 mutex_lock(&usbhid->mutex);
684
685 set_bit(HID_OPENED, &usbhid->iofl);
686
687 if (hid->quirks & HID_QUIRK_ALWAYS_POLL) {
688 res = 0;
689 goto Done;
690 }
691
692 res = usb_autopm_get_interface(usbhid->intf);
693
694 if (res < 0) {
695 clear_bit(HID_OPENED, &usbhid->iofl);
696 res = -EIO;
697 goto Done;
698 }
699
700 usbhid->intf->needs_remote_wakeup = 1;
701
702 set_bit(HID_RESUME_RUNNING, &usbhid->iofl);
703 set_bit(HID_IN_POLLING, &usbhid->iofl);
704
705 res = hid_start_in(hid);
706 if (res) {
707 if (res != -ENOSPC) {
708 hid_io_error(hid);
709 res = 0;
710 } else {
711
712 res = -EBUSY;
713 clear_bit(HID_OPENED, &usbhid->iofl);
714 clear_bit(HID_IN_POLLING, &usbhid->iofl);
715 usbhid->intf->needs_remote_wakeup = 0;
716 }
717 }
718
719 usb_autopm_put_interface(usbhid->intf);
720
721
722
723
724
725
726
727 if (res == 0)
728 msleep(50);
729
730 clear_bit(HID_RESUME_RUNNING, &usbhid->iofl);
731
732 Done:
733 mutex_unlock(&usbhid->mutex);
734 return res;
735}
736
737static void usbhid_close(struct hid_device *hid)
738{
739 struct usbhid_device *usbhid = hid->driver_data;
740
741 mutex_lock(&usbhid->mutex);
742
743
744
745
746
747
748 spin_lock_irq(&usbhid->lock);
749 clear_bit(HID_OPENED, &usbhid->iofl);
750 if (!(hid->quirks & HID_QUIRK_ALWAYS_POLL))
751 clear_bit(HID_IN_POLLING, &usbhid->iofl);
752 spin_unlock_irq(&usbhid->lock);
753
754 if (!(hid->quirks & HID_QUIRK_ALWAYS_POLL)) {
755 hid_cancel_delayed_stuff(usbhid);
756 usb_kill_urb(usbhid->urbin);
757 usbhid->intf->needs_remote_wakeup = 0;
758 }
759
760 mutex_unlock(&usbhid->mutex);
761}
762
763
764
765
766
767void usbhid_init_reports(struct hid_device *hid)
768{
769 struct hid_report *report;
770 struct usbhid_device *usbhid = hid->driver_data;
771 struct hid_report_enum *report_enum;
772 int err, ret;
773
774 report_enum = &hid->report_enum[HID_INPUT_REPORT];
775 list_for_each_entry(report, &report_enum->report_list, list)
776 usbhid_submit_report(hid, report, USB_DIR_IN);
777
778 report_enum = &hid->report_enum[HID_FEATURE_REPORT];
779 list_for_each_entry(report, &report_enum->report_list, list)
780 usbhid_submit_report(hid, report, USB_DIR_IN);
781
782 err = 0;
783 ret = usbhid_wait_io(hid);
784 while (ret) {
785 err |= ret;
786 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
787 usb_kill_urb(usbhid->urbctrl);
788 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
789 usb_kill_urb(usbhid->urbout);
790 ret = usbhid_wait_io(hid);
791 }
792
793 if (err)
794 hid_warn(hid, "timeout initializing reports\n");
795}
796
797
798
799
800static int hid_find_field_early(struct hid_device *hid, unsigned int page,
801 unsigned int hid_code, struct hid_field **pfield)
802{
803 struct hid_report *report;
804 struct hid_field *field;
805 struct hid_usage *usage;
806 int i, j;
807
808 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
809 for (i = 0; i < report->maxfield; i++) {
810 field = report->field[i];
811 for (j = 0; j < field->maxusage; j++) {
812 usage = &field->usage[j];
813 if ((usage->hid & HID_USAGE_PAGE) == page &&
814 (usage->hid & 0xFFFF) == hid_code) {
815 *pfield = field;
816 return j;
817 }
818 }
819 }
820 }
821 return -1;
822}
823
824static void usbhid_set_leds(struct hid_device *hid)
825{
826 struct hid_field *field;
827 int offset;
828
829 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
830 hid_set_field(field, offset, 0);
831 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
832 }
833}
834
835
836
837
838static void hid_find_max_report(struct hid_device *hid, unsigned int type,
839 unsigned int *max)
840{
841 struct hid_report *report;
842 unsigned int size;
843
844 list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
845 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
846 if (*max < size)
847 *max = size;
848 }
849}
850
851static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
852{
853 struct usbhid_device *usbhid = hid->driver_data;
854
855 usbhid->inbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
856 &usbhid->inbuf_dma);
857 usbhid->outbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
858 &usbhid->outbuf_dma);
859 usbhid->cr = kmalloc(sizeof(*usbhid->cr), GFP_KERNEL);
860 usbhid->ctrlbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
861 &usbhid->ctrlbuf_dma);
862 if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
863 !usbhid->ctrlbuf)
864 return -1;
865
866 return 0;
867}
868
869static int usbhid_get_raw_report(struct hid_device *hid,
870 unsigned char report_number, __u8 *buf, size_t count,
871 unsigned char report_type)
872{
873 struct usbhid_device *usbhid = hid->driver_data;
874 struct usb_device *dev = hid_to_usb_dev(hid);
875 struct usb_interface *intf = usbhid->intf;
876 struct usb_host_interface *interface = intf->cur_altsetting;
877 int skipped_report_id = 0;
878 int ret;
879
880
881 buf[0] = report_number;
882 if (report_number == 0x0) {
883
884
885 buf++;
886 count--;
887 skipped_report_id = 1;
888 }
889 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
890 HID_REQ_GET_REPORT,
891 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
892 ((report_type + 1) << 8) | report_number,
893 interface->desc.bInterfaceNumber, buf, count,
894 USB_CTRL_SET_TIMEOUT);
895
896
897 if (ret > 0 && skipped_report_id)
898 ret++;
899
900 return ret;
901}
902
903static int usbhid_set_raw_report(struct hid_device *hid, unsigned int reportnum,
904 __u8 *buf, size_t count, unsigned char rtype)
905{
906 struct usbhid_device *usbhid = hid->driver_data;
907 struct usb_device *dev = hid_to_usb_dev(hid);
908 struct usb_interface *intf = usbhid->intf;
909 struct usb_host_interface *interface = intf->cur_altsetting;
910 int ret, skipped_report_id = 0;
911
912
913 if ((rtype == HID_OUTPUT_REPORT) &&
914 (hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORT_ID))
915 buf[0] = 0;
916 else
917 buf[0] = reportnum;
918
919 if (buf[0] == 0x0) {
920
921 buf++;
922 count--;
923 skipped_report_id = 1;
924 }
925
926 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
927 HID_REQ_SET_REPORT,
928 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
929 ((rtype + 1) << 8) | reportnum,
930 interface->desc.bInterfaceNumber, buf, count,
931 USB_CTRL_SET_TIMEOUT);
932
933 if (ret > 0 && skipped_report_id)
934 ret++;
935
936 return ret;
937}
938
939static int usbhid_output_report(struct hid_device *hid, __u8 *buf, size_t count)
940{
941 struct usbhid_device *usbhid = hid->driver_data;
942 struct usb_device *dev = hid_to_usb_dev(hid);
943 int actual_length, skipped_report_id = 0, ret;
944
945 if (!usbhid->urbout)
946 return -ENOSYS;
947
948 if (buf[0] == 0x0) {
949
950 buf++;
951 count--;
952 skipped_report_id = 1;
953 }
954
955 ret = usb_interrupt_msg(dev, usbhid->urbout->pipe,
956 buf, count, &actual_length,
957 USB_CTRL_SET_TIMEOUT);
958
959 if (ret == 0) {
960 ret = actual_length;
961
962 if (skipped_report_id)
963 ret++;
964 }
965
966 return ret;
967}
968
969static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
970{
971 struct usbhid_device *usbhid = hid->driver_data;
972
973 usb_free_coherent(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
974 usb_free_coherent(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
975 kfree(usbhid->cr);
976 usb_free_coherent(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
977}
978
979static int usbhid_parse(struct hid_device *hid)
980{
981 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
982 struct usb_host_interface *interface = intf->cur_altsetting;
983 struct usb_device *dev = interface_to_usbdev (intf);
984 struct hid_descriptor *hdesc;
985 u32 quirks = 0;
986 unsigned int rsize = 0;
987 char *rdesc;
988 int ret, n;
989 int num_descriptors;
990 size_t offset = offsetof(struct hid_descriptor, desc);
991
992 quirks = hid_lookup_quirk(hid);
993
994 if (quirks & HID_QUIRK_IGNORE)
995 return -ENODEV;
996
997
998
999 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
1000 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
1001 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
1002 quirks |= HID_QUIRK_NOGET;
1003 }
1004
1005 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
1006 (!interface->desc.bNumEndpoints ||
1007 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
1008 dbg_hid("class descriptor not present\n");
1009 return -ENODEV;
1010 }
1011
1012 if (hdesc->bLength < sizeof(struct hid_descriptor)) {
1013 dbg_hid("hid descriptor is too short\n");
1014 return -EINVAL;
1015 }
1016
1017 hid->version = le16_to_cpu(hdesc->bcdHID);
1018 hid->country = hdesc->bCountryCode;
1019
1020 num_descriptors = min_t(int, hdesc->bNumDescriptors,
1021 (hdesc->bLength - offset) / sizeof(struct hid_class_descriptor));
1022
1023 for (n = 0; n < num_descriptors; n++)
1024 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
1025 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
1026
1027 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
1028 dbg_hid("weird size of report descriptor (%u)\n", rsize);
1029 return -EINVAL;
1030 }
1031
1032 rdesc = kmalloc(rsize, GFP_KERNEL);
1033 if (!rdesc)
1034 return -ENOMEM;
1035
1036 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
1037
1038 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
1039 HID_DT_REPORT, rdesc, rsize);
1040 if (ret < 0) {
1041 dbg_hid("reading report descriptor failed\n");
1042 kfree(rdesc);
1043 goto err;
1044 }
1045
1046 ret = hid_parse_report(hid, rdesc, rsize);
1047 kfree(rdesc);
1048 if (ret) {
1049 dbg_hid("parsing report descriptor failed\n");
1050 goto err;
1051 }
1052
1053 hid->quirks |= quirks;
1054
1055 return 0;
1056err:
1057 return ret;
1058}
1059
1060static int usbhid_start(struct hid_device *hid)
1061{
1062 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
1063 struct usb_host_interface *interface = intf->cur_altsetting;
1064 struct usb_device *dev = interface_to_usbdev(intf);
1065 struct usbhid_device *usbhid = hid->driver_data;
1066 unsigned int n, insize = 0;
1067 int ret;
1068
1069 mutex_lock(&usbhid->mutex);
1070
1071 clear_bit(HID_DISCONNECTED, &usbhid->iofl);
1072
1073 usbhid->bufsize = HID_MIN_BUFFER_SIZE;
1074 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
1075 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
1076 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
1077
1078 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
1079 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
1080
1081 hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
1082
1083 if (insize > HID_MAX_BUFFER_SIZE)
1084 insize = HID_MAX_BUFFER_SIZE;
1085
1086 if (hid_alloc_buffers(dev, hid)) {
1087 ret = -ENOMEM;
1088 goto fail;
1089 }
1090
1091 for (n = 0; n < interface->desc.bNumEndpoints; n++) {
1092 struct usb_endpoint_descriptor *endpoint;
1093 int pipe;
1094 int interval;
1095
1096 endpoint = &interface->endpoint[n].desc;
1097 if (!usb_endpoint_xfer_int(endpoint))
1098 continue;
1099
1100 interval = endpoint->bInterval;
1101
1102
1103 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
1104 dev->speed == USB_SPEED_HIGH) {
1105 interval = fls(endpoint->bInterval*8);
1106 pr_info("%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
1107 hid->name, endpoint->bInterval, interval);
1108 }
1109
1110
1111
1112
1113 switch (hid->collection->usage) {
1114 case HID_GD_MOUSE:
1115 if (hid_mousepoll_interval > 0)
1116 interval = hid_mousepoll_interval;
1117 break;
1118 case HID_GD_JOYSTICK:
1119 if (hid_jspoll_interval > 0)
1120 interval = hid_jspoll_interval;
1121 break;
1122 case HID_GD_KEYBOARD:
1123 if (hid_kbpoll_interval > 0)
1124 interval = hid_kbpoll_interval;
1125 break;
1126 }
1127
1128 ret = -ENOMEM;
1129 if (usb_endpoint_dir_in(endpoint)) {
1130 if (usbhid->urbin)
1131 continue;
1132 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
1133 goto fail;
1134 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
1135 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
1136 hid_irq_in, hid, interval);
1137 usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
1138 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1139 } else {
1140 if (usbhid->urbout)
1141 continue;
1142 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
1143 goto fail;
1144 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
1145 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
1146 hid_irq_out, hid, interval);
1147 usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
1148 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1149 }
1150 }
1151
1152 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
1153 if (!usbhid->urbctrl) {
1154 ret = -ENOMEM;
1155 goto fail;
1156 }
1157
1158 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
1159 usbhid->ctrlbuf, 1, hid_ctrl, hid);
1160 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
1161 usbhid->urbctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1162
1163 set_bit(HID_STARTED, &usbhid->iofl);
1164
1165 if (hid->quirks & HID_QUIRK_ALWAYS_POLL) {
1166 ret = usb_autopm_get_interface(usbhid->intf);
1167 if (ret)
1168 goto fail;
1169 set_bit(HID_IN_POLLING, &usbhid->iofl);
1170 usbhid->intf->needs_remote_wakeup = 1;
1171 ret = hid_start_in(hid);
1172 if (ret) {
1173 dev_err(&hid->dev,
1174 "failed to start in urb: %d\n", ret);
1175 }
1176 usb_autopm_put_interface(usbhid->intf);
1177 }
1178
1179
1180
1181
1182
1183
1184
1185 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1186 interface->desc.bInterfaceProtocol ==
1187 USB_INTERFACE_PROTOCOL_KEYBOARD) {
1188 usbhid_set_leds(hid);
1189 device_set_wakeup_enable(&dev->dev, 1);
1190 }
1191
1192 mutex_unlock(&usbhid->mutex);
1193 return 0;
1194
1195fail:
1196 usb_free_urb(usbhid->urbin);
1197 usb_free_urb(usbhid->urbout);
1198 usb_free_urb(usbhid->urbctrl);
1199 usbhid->urbin = NULL;
1200 usbhid->urbout = NULL;
1201 usbhid->urbctrl = NULL;
1202 hid_free_buffers(dev, hid);
1203 mutex_unlock(&usbhid->mutex);
1204 return ret;
1205}
1206
1207static void usbhid_stop(struct hid_device *hid)
1208{
1209 struct usbhid_device *usbhid = hid->driver_data;
1210
1211 if (WARN_ON(!usbhid))
1212 return;
1213
1214 if (hid->quirks & HID_QUIRK_ALWAYS_POLL) {
1215 clear_bit(HID_IN_POLLING, &usbhid->iofl);
1216 usbhid->intf->needs_remote_wakeup = 0;
1217 }
1218
1219 mutex_lock(&usbhid->mutex);
1220
1221 clear_bit(HID_STARTED, &usbhid->iofl);
1222
1223 spin_lock_irq(&usbhid->lock);
1224 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1225 while (usbhid->ctrltail != usbhid->ctrlhead) {
1226 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_OUT) {
1227 kfree(usbhid->ctrl[usbhid->ctrltail].raw_report);
1228 usbhid->ctrl[usbhid->ctrltail].raw_report = NULL;
1229 }
1230
1231 usbhid->ctrltail = (usbhid->ctrltail + 1) &
1232 (HID_CONTROL_FIFO_SIZE - 1);
1233 }
1234 spin_unlock_irq(&usbhid->lock);
1235
1236 usb_kill_urb(usbhid->urbin);
1237 usb_kill_urb(usbhid->urbout);
1238 usb_kill_urb(usbhid->urbctrl);
1239
1240 hid_cancel_delayed_stuff(usbhid);
1241
1242 hid->claimed = 0;
1243
1244 usb_free_urb(usbhid->urbin);
1245 usb_free_urb(usbhid->urbctrl);
1246 usb_free_urb(usbhid->urbout);
1247 usbhid->urbin = NULL;
1248 usbhid->urbctrl = NULL;
1249 usbhid->urbout = NULL;
1250
1251 hid_free_buffers(hid_to_usb_dev(hid), hid);
1252
1253 mutex_unlock(&usbhid->mutex);
1254}
1255
1256static int usbhid_power(struct hid_device *hid, int lvl)
1257{
1258 struct usbhid_device *usbhid = hid->driver_data;
1259 int r = 0;
1260
1261 switch (lvl) {
1262 case PM_HINT_FULLON:
1263 r = usb_autopm_get_interface(usbhid->intf);
1264 break;
1265
1266 case PM_HINT_NORMAL:
1267 usb_autopm_put_interface(usbhid->intf);
1268 break;
1269 }
1270
1271 return r;
1272}
1273
1274static void usbhid_request(struct hid_device *hid, struct hid_report *rep, int reqtype)
1275{
1276 switch (reqtype) {
1277 case HID_REQ_GET_REPORT:
1278 usbhid_submit_report(hid, rep, USB_DIR_IN);
1279 break;
1280 case HID_REQ_SET_REPORT:
1281 usbhid_submit_report(hid, rep, USB_DIR_OUT);
1282 break;
1283 }
1284}
1285
1286static int usbhid_raw_request(struct hid_device *hid, unsigned char reportnum,
1287 __u8 *buf, size_t len, unsigned char rtype,
1288 int reqtype)
1289{
1290 switch (reqtype) {
1291 case HID_REQ_GET_REPORT:
1292 return usbhid_get_raw_report(hid, reportnum, buf, len, rtype);
1293 case HID_REQ_SET_REPORT:
1294 return usbhid_set_raw_report(hid, reportnum, buf, len, rtype);
1295 default:
1296 return -EIO;
1297 }
1298}
1299
1300static int usbhid_idle(struct hid_device *hid, int report, int idle,
1301 int reqtype)
1302{
1303 struct usb_device *dev = hid_to_usb_dev(hid);
1304 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
1305 struct usb_host_interface *interface = intf->cur_altsetting;
1306 int ifnum = interface->desc.bInterfaceNumber;
1307
1308 if (reqtype != HID_REQ_SET_IDLE)
1309 return -EINVAL;
1310
1311 return hid_set_idle(dev, ifnum, report, idle);
1312}
1313
1314static bool usbhid_may_wakeup(struct hid_device *hid)
1315{
1316 struct usb_device *dev = hid_to_usb_dev(hid);
1317
1318 return device_may_wakeup(&dev->dev);
1319}
1320
1321struct hid_ll_driver usb_hid_driver = {
1322 .parse = usbhid_parse,
1323 .start = usbhid_start,
1324 .stop = usbhid_stop,
1325 .open = usbhid_open,
1326 .close = usbhid_close,
1327 .power = usbhid_power,
1328 .request = usbhid_request,
1329 .wait = usbhid_wait_io,
1330 .raw_request = usbhid_raw_request,
1331 .output_report = usbhid_output_report,
1332 .idle = usbhid_idle,
1333 .may_wakeup = usbhid_may_wakeup,
1334};
1335EXPORT_SYMBOL_GPL(usb_hid_driver);
1336
1337static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1338{
1339 struct usb_host_interface *interface = intf->cur_altsetting;
1340 struct usb_device *dev = interface_to_usbdev(intf);
1341 struct usbhid_device *usbhid;
1342 struct hid_device *hid;
1343 unsigned int n, has_in = 0;
1344 size_t len;
1345 int ret;
1346
1347 dbg_hid("HID probe called for ifnum %d\n",
1348 intf->altsetting->desc.bInterfaceNumber);
1349
1350 for (n = 0; n < interface->desc.bNumEndpoints; n++)
1351 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1352 has_in++;
1353 if (!has_in) {
1354 hid_err(intf, "couldn't find an input interrupt endpoint\n");
1355 return -ENODEV;
1356 }
1357
1358 hid = hid_allocate_device();
1359 if (IS_ERR(hid))
1360 return PTR_ERR(hid);
1361
1362 usb_set_intfdata(intf, hid);
1363 hid->ll_driver = &usb_hid_driver;
1364 hid->ff_init = hid_pidff_init;
1365#ifdef CONFIG_USB_HIDDEV
1366 hid->hiddev_connect = hiddev_connect;
1367 hid->hiddev_disconnect = hiddev_disconnect;
1368 hid->hiddev_hid_event = hiddev_hid_event;
1369 hid->hiddev_report_event = hiddev_report_event;
1370#endif
1371 hid->dev.parent = &intf->dev;
1372 hid->bus = BUS_USB;
1373 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1374 hid->product = le16_to_cpu(dev->descriptor.idProduct);
1375 hid->version = le16_to_cpu(dev->descriptor.bcdDevice);
1376 hid->name[0] = 0;
1377 if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1378 USB_INTERFACE_PROTOCOL_MOUSE)
1379 hid->type = HID_TYPE_USBMOUSE;
1380 else if (intf->cur_altsetting->desc.bInterfaceProtocol == 0)
1381 hid->type = HID_TYPE_USBNONE;
1382
1383 if (dev->manufacturer)
1384 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1385
1386 if (dev->product) {
1387 if (dev->manufacturer)
1388 strlcat(hid->name, " ", sizeof(hid->name));
1389 strlcat(hid->name, dev->product, sizeof(hid->name));
1390 }
1391
1392 if (!strlen(hid->name))
1393 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1394 le16_to_cpu(dev->descriptor.idVendor),
1395 le16_to_cpu(dev->descriptor.idProduct));
1396
1397 usb_make_path(dev, hid->phys, sizeof(hid->phys));
1398 strlcat(hid->phys, "/input", sizeof(hid->phys));
1399 len = strlen(hid->phys);
1400 if (len < sizeof(hid->phys) - 1)
1401 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1402 "%d", intf->altsetting[0].desc.bInterfaceNumber);
1403
1404 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1405 hid->uniq[0] = 0;
1406
1407 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1408 if (usbhid == NULL) {
1409 ret = -ENOMEM;
1410 goto err;
1411 }
1412
1413 hid->driver_data = usbhid;
1414 usbhid->hid = hid;
1415 usbhid->intf = intf;
1416 usbhid->ifnum = interface->desc.bInterfaceNumber;
1417
1418 init_waitqueue_head(&usbhid->wait);
1419 INIT_WORK(&usbhid->reset_work, hid_reset);
1420 timer_setup(&usbhid->io_retry, hid_retry_timeout, 0);
1421 spin_lock_init(&usbhid->lock);
1422 mutex_init(&usbhid->mutex);
1423
1424 ret = hid_add_device(hid);
1425 if (ret) {
1426 if (ret != -ENODEV)
1427 hid_err(intf, "can't add hid device: %d\n", ret);
1428 goto err_free;
1429 }
1430
1431 return 0;
1432err_free:
1433 kfree(usbhid);
1434err:
1435 hid_destroy_device(hid);
1436 return ret;
1437}
1438
1439static void usbhid_disconnect(struct usb_interface *intf)
1440{
1441 struct hid_device *hid = usb_get_intfdata(intf);
1442 struct usbhid_device *usbhid;
1443
1444 if (WARN_ON(!hid))
1445 return;
1446
1447 usbhid = hid->driver_data;
1448 spin_lock_irq(&usbhid->lock);
1449 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1450 spin_unlock_irq(&usbhid->lock);
1451 hid_destroy_device(hid);
1452 kfree(usbhid);
1453}
1454
1455static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1456{
1457 del_timer_sync(&usbhid->io_retry);
1458 cancel_work_sync(&usbhid->reset_work);
1459}
1460
1461static void hid_cease_io(struct usbhid_device *usbhid)
1462{
1463 del_timer_sync(&usbhid->io_retry);
1464 usb_kill_urb(usbhid->urbin);
1465 usb_kill_urb(usbhid->urbctrl);
1466 usb_kill_urb(usbhid->urbout);
1467}
1468
1469static void hid_restart_io(struct hid_device *hid)
1470{
1471 struct usbhid_device *usbhid = hid->driver_data;
1472 int clear_halt = test_bit(HID_CLEAR_HALT, &usbhid->iofl);
1473 int reset_pending = test_bit(HID_RESET_PENDING, &usbhid->iofl);
1474
1475 spin_lock_irq(&usbhid->lock);
1476 clear_bit(HID_SUSPENDED, &usbhid->iofl);
1477 usbhid_mark_busy(usbhid);
1478
1479 if (clear_halt || reset_pending)
1480 schedule_work(&usbhid->reset_work);
1481 usbhid->retry_delay = 0;
1482 spin_unlock_irq(&usbhid->lock);
1483
1484 if (reset_pending || !test_bit(HID_STARTED, &usbhid->iofl))
1485 return;
1486
1487 if (!clear_halt) {
1488 if (hid_start_in(hid) < 0)
1489 hid_io_error(hid);
1490 }
1491
1492 spin_lock_irq(&usbhid->lock);
1493 if (usbhid->urbout && !test_bit(HID_OUT_RUNNING, &usbhid->iofl))
1494 usbhid_restart_out_queue(usbhid);
1495 if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
1496 usbhid_restart_ctrl_queue(usbhid);
1497 spin_unlock_irq(&usbhid->lock);
1498}
1499
1500
1501static int hid_pre_reset(struct usb_interface *intf)
1502{
1503 struct hid_device *hid = usb_get_intfdata(intf);
1504 struct usbhid_device *usbhid = hid->driver_data;
1505
1506 spin_lock_irq(&usbhid->lock);
1507 set_bit(HID_RESET_PENDING, &usbhid->iofl);
1508 spin_unlock_irq(&usbhid->lock);
1509 hid_cease_io(usbhid);
1510
1511 return 0;
1512}
1513
1514
1515static int hid_post_reset(struct usb_interface *intf)
1516{
1517 struct usb_device *dev = interface_to_usbdev (intf);
1518 struct hid_device *hid = usb_get_intfdata(intf);
1519 struct usbhid_device *usbhid = hid->driver_data;
1520 struct usb_host_interface *interface = intf->cur_altsetting;
1521 int status;
1522 char *rdesc;
1523
1524
1525
1526
1527
1528
1529 rdesc = kmalloc(hid->dev_rsize, GFP_KERNEL);
1530 if (!rdesc)
1531 return -ENOMEM;
1532
1533 status = hid_get_class_descriptor(dev,
1534 interface->desc.bInterfaceNumber,
1535 HID_DT_REPORT, rdesc, hid->dev_rsize);
1536 if (status < 0) {
1537 dbg_hid("reading report descriptor failed (post_reset)\n");
1538 kfree(rdesc);
1539 return status;
1540 }
1541 status = memcmp(rdesc, hid->dev_rdesc, hid->dev_rsize);
1542 kfree(rdesc);
1543 if (status != 0) {
1544 dbg_hid("report descriptor changed\n");
1545 return -EPERM;
1546 }
1547
1548
1549 spin_lock_irq(&usbhid->lock);
1550 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1551 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
1552 spin_unlock_irq(&usbhid->lock);
1553 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1554
1555 hid_restart_io(hid);
1556
1557 return 0;
1558}
1559
1560#ifdef CONFIG_PM
1561static int hid_resume_common(struct hid_device *hid, bool driver_suspended)
1562{
1563 int status = 0;
1564
1565 hid_restart_io(hid);
1566 if (driver_suspended && hid->driver && hid->driver->resume)
1567 status = hid->driver->resume(hid);
1568 return status;
1569}
1570
1571static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1572{
1573 struct hid_device *hid = usb_get_intfdata(intf);
1574 struct usbhid_device *usbhid = hid->driver_data;
1575 int status = 0;
1576 bool driver_suspended = false;
1577 unsigned int ledcount;
1578
1579 if (PMSG_IS_AUTO(message)) {
1580 ledcount = hidinput_count_leds(hid);
1581 spin_lock_irq(&usbhid->lock);
1582 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1583 && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1584 && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1585 && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1586 && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1587 && (!ledcount || ignoreled))
1588 {
1589 set_bit(HID_SUSPENDED, &usbhid->iofl);
1590 spin_unlock_irq(&usbhid->lock);
1591 if (hid->driver && hid->driver->suspend) {
1592 status = hid->driver->suspend(hid, message);
1593 if (status < 0)
1594 goto failed;
1595 }
1596 driver_suspended = true;
1597 } else {
1598 usbhid_mark_busy(usbhid);
1599 spin_unlock_irq(&usbhid->lock);
1600 return -EBUSY;
1601 }
1602
1603 } else {
1604
1605 if (hid->driver && hid->driver->suspend)
1606 status = hid->driver->suspend(hid, message);
1607 driver_suspended = true;
1608 spin_lock_irq(&usbhid->lock);
1609 set_bit(HID_SUSPENDED, &usbhid->iofl);
1610 spin_unlock_irq(&usbhid->lock);
1611 if (usbhid_wait_io(hid) < 0)
1612 status = -EIO;
1613 }
1614
1615 hid_cancel_delayed_stuff(usbhid);
1616 hid_cease_io(usbhid);
1617
1618 if (PMSG_IS_AUTO(message) && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1619
1620 status = -EBUSY;
1621 goto failed;
1622 }
1623 dev_dbg(&intf->dev, "suspend\n");
1624 return status;
1625
1626 failed:
1627 hid_resume_common(hid, driver_suspended);
1628 return status;
1629}
1630
1631static int hid_resume(struct usb_interface *intf)
1632{
1633 struct hid_device *hid = usb_get_intfdata (intf);
1634 int status;
1635
1636 status = hid_resume_common(hid, true);
1637 dev_dbg(&intf->dev, "resume status %d\n", status);
1638 return 0;
1639}
1640
1641static int hid_reset_resume(struct usb_interface *intf)
1642{
1643 struct hid_device *hid = usb_get_intfdata(intf);
1644 int status;
1645
1646 status = hid_post_reset(intf);
1647 if (status >= 0 && hid->driver && hid->driver->reset_resume) {
1648 int ret = hid->driver->reset_resume(hid);
1649 if (ret < 0)
1650 status = ret;
1651 }
1652 return status;
1653}
1654
1655#endif
1656
1657static const struct usb_device_id hid_usb_ids[] = {
1658 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1659 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1660 { }
1661};
1662
1663MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1664
1665static struct usb_driver hid_driver = {
1666 .name = "usbhid",
1667 .probe = usbhid_probe,
1668 .disconnect = usbhid_disconnect,
1669#ifdef CONFIG_PM
1670 .suspend = hid_suspend,
1671 .resume = hid_resume,
1672 .reset_resume = hid_reset_resume,
1673#endif
1674 .pre_reset = hid_pre_reset,
1675 .post_reset = hid_post_reset,
1676 .id_table = hid_usb_ids,
1677 .supports_autosuspend = 1,
1678};
1679
1680struct usb_interface *usbhid_find_interface(int minor)
1681{
1682 return usb_find_interface(&hid_driver, minor);
1683}
1684
1685static int __init hid_init(void)
1686{
1687 int retval;
1688
1689 retval = hid_quirks_init(quirks_param, BUS_USB, MAX_USBHID_BOOT_QUIRKS);
1690 if (retval)
1691 goto usbhid_quirks_init_fail;
1692 retval = usb_register(&hid_driver);
1693 if (retval)
1694 goto usb_register_fail;
1695 pr_info(KBUILD_MODNAME ": " DRIVER_DESC "\n");
1696
1697 return 0;
1698usb_register_fail:
1699 hid_quirks_exit(BUS_USB);
1700usbhid_quirks_init_fail:
1701 return retval;
1702}
1703
1704static void __exit hid_exit(void)
1705{
1706 usb_deregister(&hid_driver);
1707 hid_quirks_exit(BUS_USB);
1708}
1709
1710module_init(hid_init);
1711module_exit(hid_exit);
1712
1713MODULE_AUTHOR("Andreas Gal");
1714MODULE_AUTHOR("Vojtech Pavlik");
1715MODULE_AUTHOR("Jiri Kosina");
1716MODULE_DESCRIPTION(DRIVER_DESC);
1717MODULE_LICENSE("GPL");
1718
