1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18#include <linux/module.h>
19#include <linux/slab.h>
20#include <linux/init.h>
21#include <linux/kernel.h>
22#include <linux/list.h>
23#include <linux/mm.h>
24#include <linux/mutex.h>
25#include <linux/spinlock.h>
26#include <asm/unaligned.h>
27#include <asm/byteorder.h>
28#include <linux/input.h>
29#include <linux/wait.h>
30#include <linux/workqueue.h>
31#include <linux/string.h>
32
33#include <linux/usb.h>
34
35#include <linux/hid.h>
36#include <linux/hiddev.h>
37#include <linux/hid-debug.h>
38#include <linux/hidraw.h>
39#include "usbhid.h"
40
41
42
43
44
45#define DRIVER_DESC "USB HID core driver"
46
47
48
49
50
51static unsigned int hid_mousepoll_interval;
52module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
53MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
54
55static unsigned int hid_jspoll_interval;
56module_param_named(jspoll, hid_jspoll_interval, uint, 0644);
57MODULE_PARM_DESC(jspoll, "Polling interval of joysticks");
58
59static unsigned int hid_kbpoll_interval;
60module_param_named(kbpoll, hid_kbpoll_interval, uint, 0644);
61MODULE_PARM_DESC(kbpoll, "Polling interval of keyboards");
62
63static unsigned int ignoreled;
64module_param_named(ignoreled, ignoreled, uint, 0644);
65MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds");
66
67
68static char *quirks_param[MAX_USBHID_BOOT_QUIRKS];
69module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
70MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
71 " quirks=vendorID:productID:quirks"
72 " where vendorID, productID, and quirks are all in"
73 " 0x-prefixed hex");
74
75
76
77static void hid_io_error(struct hid_device *hid);
78static int hid_submit_out(struct hid_device *hid);
79static int hid_submit_ctrl(struct hid_device *hid);
80static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid);
81
82
83static int hid_start_in(struct hid_device *hid)
84{
85 unsigned long flags;
86 int rc = 0;
87 struct usbhid_device *usbhid = hid->driver_data;
88
89 spin_lock_irqsave(&usbhid->lock, flags);
90 if (test_bit(HID_IN_POLLING, &usbhid->iofl) &&
91 !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
92 !test_bit(HID_SUSPENDED, &usbhid->iofl) &&
93 !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
94 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
95 if (rc != 0) {
96 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
97 if (rc == -ENOSPC)
98 set_bit(HID_NO_BANDWIDTH, &usbhid->iofl);
99 } else {
100 clear_bit(HID_NO_BANDWIDTH, &usbhid->iofl);
101 }
102 }
103 spin_unlock_irqrestore(&usbhid->lock, flags);
104 return rc;
105}
106
107
108static void hid_retry_timeout(struct timer_list *t)
109{
110 struct usbhid_device *usbhid = from_timer(usbhid, t, io_retry);
111 struct hid_device *hid = usbhid->hid;
112
113 dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
114 if (hid_start_in(hid))
115 hid_io_error(hid);
116}
117
118
119static void hid_reset(struct work_struct *work)
120{
121 struct usbhid_device *usbhid =
122 container_of(work, struct usbhid_device, reset_work);
123 struct hid_device *hid = usbhid->hid;
124 int rc;
125
126 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
127 dev_dbg(&usbhid->intf->dev, "clear halt\n");
128 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
129 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
130 if (rc == 0) {
131 hid_start_in(hid);
132 } else {
133 dev_dbg(&usbhid->intf->dev,
134 "clear-halt failed: %d\n", rc);
135 set_bit(HID_RESET_PENDING, &usbhid->iofl);
136 }
137 }
138
139 if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
140 dev_dbg(&usbhid->intf->dev, "resetting device\n");
141 usb_queue_reset_device(usbhid->intf);
142 }
143}
144
145
146static void hid_io_error(struct hid_device *hid)
147{
148 unsigned long flags;
149 struct usbhid_device *usbhid = hid->driver_data;
150
151 spin_lock_irqsave(&usbhid->lock, flags);
152
153
154 if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
155 goto done;
156
157
158
159 if (time_after(jiffies, usbhid->stop_retry + HZ/2))
160 usbhid->retry_delay = 0;
161
162
163 if (usbhid->retry_delay == 0) {
164 usbhid->retry_delay = 13;
165 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
166 } else if (usbhid->retry_delay < 100)
167 usbhid->retry_delay *= 2;
168
169 if (time_after(jiffies, usbhid->stop_retry)) {
170
171
172 if (!test_bit(HID_NO_BANDWIDTH, &usbhid->iofl)
173 && !test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
174
175 schedule_work(&usbhid->reset_work);
176 goto done;
177 }
178 }
179
180 mod_timer(&usbhid->io_retry,
181 jiffies + msecs_to_jiffies(usbhid->retry_delay));
182done:
183 spin_unlock_irqrestore(&usbhid->lock, flags);
184}
185
186static void usbhid_mark_busy(struct usbhid_device *usbhid)
187{
188 struct usb_interface *intf = usbhid->intf;
189
190 usb_mark_last_busy(interface_to_usbdev(intf));
191}
192
193static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
194{
195 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
196 int kicked;
197 int r;
198
199 if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) ||
200 test_bit(HID_SUSPENDED, &usbhid->iofl))
201 return 0;
202
203 if ((kicked = (usbhid->outhead != usbhid->outtail))) {
204 hid_dbg(hid, "Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
205
206
207 r = usb_autopm_get_interface_async(usbhid->intf);
208 if (r < 0)
209 return r;
210
211
212
213
214
215 if (test_bit(HID_SUSPENDED, &usbhid->iofl)) {
216 usb_autopm_put_interface_no_suspend(usbhid->intf);
217 return r;
218 }
219
220
221 set_bit(HID_OUT_RUNNING, &usbhid->iofl);
222 if (hid_submit_out(hid)) {
223 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
224 usb_autopm_put_interface_async(usbhid->intf);
225 }
226 wake_up(&usbhid->wait);
227 }
228 return kicked;
229}
230
231static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
232{
233 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
234 int kicked;
235 int r;
236
237 WARN_ON(hid == NULL);
238 if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) ||
239 test_bit(HID_SUSPENDED, &usbhid->iofl))
240 return 0;
241
242 if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
243 hid_dbg(hid, "Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
244
245
246 r = usb_autopm_get_interface_async(usbhid->intf);
247 if (r < 0)
248 return r;
249
250
251
252
253
254 if (test_bit(HID_SUSPENDED, &usbhid->iofl)) {
255 usb_autopm_put_interface_no_suspend(usbhid->intf);
256 return r;
257 }
258
259
260 set_bit(HID_CTRL_RUNNING, &usbhid->iofl);
261 if (hid_submit_ctrl(hid)) {
262 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
263 usb_autopm_put_interface_async(usbhid->intf);
264 }
265 wake_up(&usbhid->wait);
266 }
267 return kicked;
268}
269
270
271
272
273
274static void hid_irq_in(struct urb *urb)
275{
276 struct hid_device *hid = urb->context;
277 struct usbhid_device *usbhid = hid->driver_data;
278 int status;
279
280 switch (urb->status) {
281 case 0:
282 usbhid->retry_delay = 0;
283 if (!test_bit(HID_OPENED, &usbhid->iofl))
284 break;
285 usbhid_mark_busy(usbhid);
286 if (!test_bit(HID_RESUME_RUNNING, &usbhid->iofl)) {
287 hid_input_report(urb->context, HID_INPUT_REPORT,
288 urb->transfer_buffer,
289 urb->actual_length, 1);
290
291
292
293
294
295 if (hid_check_keys_pressed(hid))
296 set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
297 else
298 clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
299 }
300 break;
301 case -EPIPE:
302 usbhid_mark_busy(usbhid);
303 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
304 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
305 schedule_work(&usbhid->reset_work);
306 return;
307 case -ECONNRESET:
308 case -ENOENT:
309 case -ESHUTDOWN:
310 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
311 return;
312 case -EILSEQ:
313 case -EPROTO:
314 case -ETIME:
315 case -ETIMEDOUT:
316 usbhid_mark_busy(usbhid);
317 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
318 hid_io_error(hid);
319 return;
320 default:
321 hid_warn(urb->dev, "input irq status %d received\n",
322 urb->status);
323 }
324
325 status = usb_submit_urb(urb, GFP_ATOMIC);
326 if (status) {
327 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
328 if (status != -EPERM) {
329 hid_err(hid, "can't resubmit intr, %s-%s/input%d, status %d\n",
330 hid_to_usb_dev(hid)->bus->bus_name,
331 hid_to_usb_dev(hid)->devpath,
332 usbhid->ifnum, status);
333 hid_io_error(hid);
334 }
335 }
336}
337
338static int hid_submit_out(struct hid_device *hid)
339{
340 struct hid_report *report;
341 char *raw_report;
342 struct usbhid_device *usbhid = hid->driver_data;
343 int r;
344
345 report = usbhid->out[usbhid->outtail].report;
346 raw_report = usbhid->out[usbhid->outtail].raw_report;
347
348 usbhid->urbout->transfer_buffer_length = hid_report_len(report);
349 usbhid->urbout->dev = hid_to_usb_dev(hid);
350 if (raw_report) {
351 memcpy(usbhid->outbuf, raw_report,
352 usbhid->urbout->transfer_buffer_length);
353 kfree(raw_report);
354 usbhid->out[usbhid->outtail].raw_report = NULL;
355 }
356
357 dbg_hid("submitting out urb\n");
358
359 r = usb_submit_urb(usbhid->urbout, GFP_ATOMIC);
360 if (r < 0) {
361 hid_err(hid, "usb_submit_urb(out) failed: %d\n", r);
362 return r;
363 }
364 usbhid->last_out = jiffies;
365 return 0;
366}
367
368static int hid_submit_ctrl(struct hid_device *hid)
369{
370 struct hid_report *report;
371 unsigned char dir;
372 char *raw_report;
373 int len, r;
374 struct usbhid_device *usbhid = hid->driver_data;
375
376 report = usbhid->ctrl[usbhid->ctrltail].report;
377 raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
378 dir = usbhid->ctrl[usbhid->ctrltail].dir;
379
380 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
381 if (dir == USB_DIR_OUT) {
382 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
383 usbhid->urbctrl->transfer_buffer_length = len;
384 if (raw_report) {
385 memcpy(usbhid->ctrlbuf, raw_report, len);
386 kfree(raw_report);
387 usbhid->ctrl[usbhid->ctrltail].raw_report = NULL;
388 }
389 } else {
390 int maxpacket, padlen;
391
392 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
393 maxpacket = usb_maxpacket(hid_to_usb_dev(hid),
394 usbhid->urbctrl->pipe, 0);
395 if (maxpacket > 0) {
396 padlen = DIV_ROUND_UP(len, maxpacket);
397 padlen *= maxpacket;
398 if (padlen > usbhid->bufsize)
399 padlen = usbhid->bufsize;
400 } else
401 padlen = 0;
402 usbhid->urbctrl->transfer_buffer_length = padlen;
403 }
404 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
405
406 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
407 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT :
408 HID_REQ_GET_REPORT;
409 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) |
410 report->id);
411 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
412 usbhid->cr->wLength = cpu_to_le16(len);
413
414 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
415 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" :
416 "Get_Report",
417 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
418
419 r = usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC);
420 if (r < 0) {
421 hid_err(hid, "usb_submit_urb(ctrl) failed: %d\n", r);
422 return r;
423 }
424 usbhid->last_ctrl = jiffies;
425 return 0;
426}
427
428
429
430
431
432static void hid_irq_out(struct urb *urb)
433{
434 struct hid_device *hid = urb->context;
435 struct usbhid_device *usbhid = hid->driver_data;
436 unsigned long flags;
437 int unplug = 0;
438
439 switch (urb->status) {
440 case 0:
441 break;
442 case -ESHUTDOWN:
443 unplug = 1;
444 case -EILSEQ:
445 case -EPROTO:
446 case -ECONNRESET:
447 case -ENOENT:
448 break;
449 default:
450 hid_warn(urb->dev, "output irq status %d received\n",
451 urb->status);
452 }
453
454 spin_lock_irqsave(&usbhid->lock, flags);
455
456 if (unplug) {
457 usbhid->outtail = usbhid->outhead;
458 } else {
459 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
460
461 if (usbhid->outhead != usbhid->outtail &&
462 hid_submit_out(hid) == 0) {
463
464 spin_unlock_irqrestore(&usbhid->lock, flags);
465 return;
466 }
467 }
468
469 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
470 spin_unlock_irqrestore(&usbhid->lock, flags);
471 usb_autopm_put_interface_async(usbhid->intf);
472 wake_up(&usbhid->wait);
473}
474
475
476
477
478
479static void hid_ctrl(struct urb *urb)
480{
481 struct hid_device *hid = urb->context;
482 struct usbhid_device *usbhid = hid->driver_data;
483 int unplug = 0, status = urb->status;
484
485 switch (status) {
486 case 0:
487 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
488 hid_input_report(urb->context,
489 usbhid->ctrl[usbhid->ctrltail].report->type,
490 urb->transfer_buffer, urb->actual_length, 0);
491 break;
492 case -ESHUTDOWN:
493 unplug = 1;
494 case -EILSEQ:
495 case -EPROTO:
496 case -ECONNRESET:
497 case -ENOENT:
498 case -EPIPE:
499 break;
500 default:
501 hid_warn(urb->dev, "ctrl urb status %d received\n", status);
502 }
503
504 spin_lock(&usbhid->lock);
505
506 if (unplug) {
507 usbhid->ctrltail = usbhid->ctrlhead;
508 } else {
509 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
510
511 if (usbhid->ctrlhead != usbhid->ctrltail &&
512 hid_submit_ctrl(hid) == 0) {
513
514 spin_unlock(&usbhid->lock);
515 return;
516 }
517 }
518
519 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
520 spin_unlock(&usbhid->lock);
521 usb_autopm_put_interface_async(usbhid->intf);
522 wake_up(&usbhid->wait);
523}
524
525static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
526 unsigned char dir)
527{
528 int head;
529 struct usbhid_device *usbhid = hid->driver_data;
530
531 if (((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN) ||
532 test_bit(HID_DISCONNECTED, &usbhid->iofl))
533 return;
534
535 if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
536 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
537 hid_warn(hid, "output queue full\n");
538 return;
539 }
540
541 usbhid->out[usbhid->outhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC);
542 if (!usbhid->out[usbhid->outhead].raw_report) {
543 hid_warn(hid, "output queueing failed\n");
544 return;
545 }
546 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
547 usbhid->out[usbhid->outhead].report = report;
548 usbhid->outhead = head;
549
550
551 if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl)) {
552 usbhid_restart_out_queue(usbhid);
553
554
555 } else if (time_after(jiffies, usbhid->last_out + HZ * 5)) {
556
557
558 usb_autopm_get_interface_no_resume(usbhid->intf);
559
560
561
562
563
564
565 usb_block_urb(usbhid->urbout);
566
567
568 spin_unlock(&usbhid->lock);
569
570 usb_unlink_urb(usbhid->urbout);
571 spin_lock(&usbhid->lock);
572 usb_unblock_urb(usbhid->urbout);
573
574
575 if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl))
576 usbhid_restart_out_queue(usbhid);
577
578
579 usb_autopm_put_interface_async(usbhid->intf);
580 }
581 return;
582 }
583
584 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
585 hid_warn(hid, "control queue full\n");
586 return;
587 }
588
589 if (dir == USB_DIR_OUT) {
590 usbhid->ctrl[usbhid->ctrlhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC);
591 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
592 hid_warn(hid, "control queueing failed\n");
593 return;
594 }
595 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
596 }
597 usbhid->ctrl[usbhid->ctrlhead].report = report;
598 usbhid->ctrl[usbhid->ctrlhead].dir = dir;
599 usbhid->ctrlhead = head;
600
601
602 if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) {
603 usbhid_restart_ctrl_queue(usbhid);
604
605
606 } else if (time_after(jiffies, usbhid->last_ctrl + HZ * 5)) {
607
608
609 usb_autopm_get_interface_no_resume(usbhid->intf);
610
611
612
613
614
615
616 usb_block_urb(usbhid->urbctrl);
617
618
619 spin_unlock(&usbhid->lock);
620
621 usb_unlink_urb(usbhid->urbctrl);
622 spin_lock(&usbhid->lock);
623 usb_unblock_urb(usbhid->urbctrl);
624
625
626 if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
627 usbhid_restart_ctrl_queue(usbhid);
628
629
630 usb_autopm_put_interface_async(usbhid->intf);
631 }
632}
633
634static void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
635{
636 struct usbhid_device *usbhid = hid->driver_data;
637 unsigned long flags;
638
639 spin_lock_irqsave(&usbhid->lock, flags);
640 __usbhid_submit_report(hid, report, dir);
641 spin_unlock_irqrestore(&usbhid->lock, flags);
642}
643
644static int usbhid_wait_io(struct hid_device *hid)
645{
646 struct usbhid_device *usbhid = hid->driver_data;
647
648 if (!wait_event_timeout(usbhid->wait,
649 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
650 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
651 10*HZ)) {
652 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
653 return -1;
654 }
655
656 return 0;
657}
658
659static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
660{
661 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
662 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
663 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
664}
665
666static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
667 unsigned char type, void *buf, int size)
668{
669 int result, retries = 4;
670
671 memset(buf, 0, size);
672
673 do {
674 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
675 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
676 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
677 retries--;
678 } while (result < size && retries);
679 return result;
680}
681
682static int usbhid_open(struct hid_device *hid)
683{
684 struct usbhid_device *usbhid = hid->driver_data;
685 int res;
686
687 set_bit(HID_OPENED, &usbhid->iofl);
688
689 if (hid->quirks & HID_QUIRK_ALWAYS_POLL)
690 return 0;
691
692 res = usb_autopm_get_interface(usbhid->intf);
693
694 if (res < 0) {
695 clear_bit(HID_OPENED, &usbhid->iofl);
696 return -EIO;
697 }
698
699 usbhid->intf->needs_remote_wakeup = 1;
700
701 set_bit(HID_RESUME_RUNNING, &usbhid->iofl);
702 set_bit(HID_IN_POLLING, &usbhid->iofl);
703
704 res = hid_start_in(hid);
705 if (res) {
706 if (res != -ENOSPC) {
707 hid_io_error(hid);
708 res = 0;
709 } else {
710
711 res = -EBUSY;
712 clear_bit(HID_OPENED, &usbhid->iofl);
713 clear_bit(HID_IN_POLLING, &usbhid->iofl);
714 usbhid->intf->needs_remote_wakeup = 0;
715 }
716 }
717
718 usb_autopm_put_interface(usbhid->intf);
719
720
721
722
723
724
725
726 if (res == 0)
727 msleep(50);
728
729 clear_bit(HID_RESUME_RUNNING, &usbhid->iofl);
730 return res;
731}
732
733static void usbhid_close(struct hid_device *hid)
734{
735 struct usbhid_device *usbhid = hid->driver_data;
736
737
738
739
740
741
742 spin_lock_irq(&usbhid->lock);
743 clear_bit(HID_OPENED, &usbhid->iofl);
744 if (!(hid->quirks & HID_QUIRK_ALWAYS_POLL))
745 clear_bit(HID_IN_POLLING, &usbhid->iofl);
746 spin_unlock_irq(&usbhid->lock);
747
748 if (hid->quirks & HID_QUIRK_ALWAYS_POLL)
749 return;
750
751 hid_cancel_delayed_stuff(usbhid);
752 usb_kill_urb(usbhid->urbin);
753 usbhid->intf->needs_remote_wakeup = 0;
754}
755
756
757
758
759
760void usbhid_init_reports(struct hid_device *hid)
761{
762 struct hid_report *report;
763 struct usbhid_device *usbhid = hid->driver_data;
764 struct hid_report_enum *report_enum;
765 int err, ret;
766
767 report_enum = &hid->report_enum[HID_INPUT_REPORT];
768 list_for_each_entry(report, &report_enum->report_list, list)
769 usbhid_submit_report(hid, report, USB_DIR_IN);
770
771 report_enum = &hid->report_enum[HID_FEATURE_REPORT];
772 list_for_each_entry(report, &report_enum->report_list, list)
773 usbhid_submit_report(hid, report, USB_DIR_IN);
774
775 err = 0;
776 ret = usbhid_wait_io(hid);
777 while (ret) {
778 err |= ret;
779 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
780 usb_kill_urb(usbhid->urbctrl);
781 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
782 usb_kill_urb(usbhid->urbout);
783 ret = usbhid_wait_io(hid);
784 }
785
786 if (err)
787 hid_warn(hid, "timeout initializing reports\n");
788}
789
790
791
792
793static int hid_find_field_early(struct hid_device *hid, unsigned int page,
794 unsigned int hid_code, struct hid_field **pfield)
795{
796 struct hid_report *report;
797 struct hid_field *field;
798 struct hid_usage *usage;
799 int i, j;
800
801 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
802 for (i = 0; i < report->maxfield; i++) {
803 field = report->field[i];
804 for (j = 0; j < field->maxusage; j++) {
805 usage = &field->usage[j];
806 if ((usage->hid & HID_USAGE_PAGE) == page &&
807 (usage->hid & 0xFFFF) == hid_code) {
808 *pfield = field;
809 return j;
810 }
811 }
812 }
813 }
814 return -1;
815}
816
817static void usbhid_set_leds(struct hid_device *hid)
818{
819 struct hid_field *field;
820 int offset;
821
822 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
823 hid_set_field(field, offset, 0);
824 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
825 }
826}
827
828
829
830
831static void hid_find_max_report(struct hid_device *hid, unsigned int type,
832 unsigned int *max)
833{
834 struct hid_report *report;
835 unsigned int size;
836
837 list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
838 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
839 if (*max < size)
840 *max = size;
841 }
842}
843
844static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
845{
846 struct usbhid_device *usbhid = hid->driver_data;
847
848 usbhid->inbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
849 &usbhid->inbuf_dma);
850 usbhid->outbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
851 &usbhid->outbuf_dma);
852 usbhid->cr = kmalloc(sizeof(*usbhid->cr), GFP_KERNEL);
853 usbhid->ctrlbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
854 &usbhid->ctrlbuf_dma);
855 if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
856 !usbhid->ctrlbuf)
857 return -1;
858
859 return 0;
860}
861
862static int usbhid_get_raw_report(struct hid_device *hid,
863 unsigned char report_number, __u8 *buf, size_t count,
864 unsigned char report_type)
865{
866 struct usbhid_device *usbhid = hid->driver_data;
867 struct usb_device *dev = hid_to_usb_dev(hid);
868 struct usb_interface *intf = usbhid->intf;
869 struct usb_host_interface *interface = intf->cur_altsetting;
870 int skipped_report_id = 0;
871 int ret;
872
873
874 buf[0] = report_number;
875 if (report_number == 0x0) {
876
877
878 buf++;
879 count--;
880 skipped_report_id = 1;
881 }
882 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
883 HID_REQ_GET_REPORT,
884 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
885 ((report_type + 1) << 8) | report_number,
886 interface->desc.bInterfaceNumber, buf, count,
887 USB_CTRL_SET_TIMEOUT);
888
889
890 if (ret > 0 && skipped_report_id)
891 ret++;
892
893 return ret;
894}
895
896static int usbhid_set_raw_report(struct hid_device *hid, unsigned int reportnum,
897 __u8 *buf, size_t count, unsigned char rtype)
898{
899 struct usbhid_device *usbhid = hid->driver_data;
900 struct usb_device *dev = hid_to_usb_dev(hid);
901 struct usb_interface *intf = usbhid->intf;
902 struct usb_host_interface *interface = intf->cur_altsetting;
903 int ret, skipped_report_id = 0;
904
905
906 if ((rtype == HID_OUTPUT_REPORT) &&
907 (hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORT_ID))
908 buf[0] = 0;
909 else
910 buf[0] = reportnum;
911
912 if (buf[0] == 0x0) {
913
914 buf++;
915 count--;
916 skipped_report_id = 1;
917 }
918
919 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
920 HID_REQ_SET_REPORT,
921 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
922 ((rtype + 1) << 8) | reportnum,
923 interface->desc.bInterfaceNumber, buf, count,
924 USB_CTRL_SET_TIMEOUT);
925
926 if (ret > 0 && skipped_report_id)
927 ret++;
928
929 return ret;
930}
931
932static int usbhid_output_report(struct hid_device *hid, __u8 *buf, size_t count)
933{
934 struct usbhid_device *usbhid = hid->driver_data;
935 struct usb_device *dev = hid_to_usb_dev(hid);
936 int actual_length, skipped_report_id = 0, ret;
937
938 if (!usbhid->urbout)
939 return -ENOSYS;
940
941 if (buf[0] == 0x0) {
942
943 buf++;
944 count--;
945 skipped_report_id = 1;
946 }
947
948 ret = usb_interrupt_msg(dev, usbhid->urbout->pipe,
949 buf, count, &actual_length,
950 USB_CTRL_SET_TIMEOUT);
951
952 if (ret == 0) {
953 ret = actual_length;
954
955 if (skipped_report_id)
956 ret++;
957 }
958
959 return ret;
960}
961
962static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
963{
964 struct usbhid_device *usbhid = hid->driver_data;
965
966 usb_free_coherent(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
967 usb_free_coherent(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
968 kfree(usbhid->cr);
969 usb_free_coherent(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
970}
971
972static int usbhid_parse(struct hid_device *hid)
973{
974 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
975 struct usb_host_interface *interface = intf->cur_altsetting;
976 struct usb_device *dev = interface_to_usbdev (intf);
977 struct hid_descriptor *hdesc;
978 u32 quirks = 0;
979 unsigned int rsize = 0;
980 char *rdesc;
981 int ret, n;
982 int num_descriptors;
983 size_t offset = offsetof(struct hid_descriptor, desc);
984
985 quirks = hid_lookup_quirk(hid);
986
987 if (quirks & HID_QUIRK_IGNORE)
988 return -ENODEV;
989
990
991
992 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
993 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
994 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
995 quirks |= HID_QUIRK_NOGET;
996 }
997
998 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
999 (!interface->desc.bNumEndpoints ||
1000 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
1001 dbg_hid("class descriptor not present\n");
1002 return -ENODEV;
1003 }
1004
1005 if (hdesc->bLength < sizeof(struct hid_descriptor)) {
1006 dbg_hid("hid descriptor is too short\n");
1007 return -EINVAL;
1008 }
1009
1010 hid->version = le16_to_cpu(hdesc->bcdHID);
1011 hid->country = hdesc->bCountryCode;
1012
1013 num_descriptors = min_t(int, hdesc->bNumDescriptors,
1014 (hdesc->bLength - offset) / sizeof(struct hid_class_descriptor));
1015
1016 for (n = 0; n < num_descriptors; n++)
1017 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
1018 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
1019
1020 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
1021 dbg_hid("weird size of report descriptor (%u)\n", rsize);
1022 return -EINVAL;
1023 }
1024
1025 rdesc = kmalloc(rsize, GFP_KERNEL);
1026 if (!rdesc)
1027 return -ENOMEM;
1028
1029 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
1030
1031 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
1032 HID_DT_REPORT, rdesc, rsize);
1033 if (ret < 0) {
1034 dbg_hid("reading report descriptor failed\n");
1035 kfree(rdesc);
1036 goto err;
1037 }
1038
1039 ret = hid_parse_report(hid, rdesc, rsize);
1040 kfree(rdesc);
1041 if (ret) {
1042 dbg_hid("parsing report descriptor failed\n");
1043 goto err;
1044 }
1045
1046 hid->quirks |= quirks;
1047
1048 return 0;
1049err:
1050 return ret;
1051}
1052
1053static int usbhid_start(struct hid_device *hid)
1054{
1055 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
1056 struct usb_host_interface *interface = intf->cur_altsetting;
1057 struct usb_device *dev = interface_to_usbdev(intf);
1058 struct usbhid_device *usbhid = hid->driver_data;
1059 unsigned int n, insize = 0;
1060 int ret;
1061
1062 clear_bit(HID_DISCONNECTED, &usbhid->iofl);
1063
1064 usbhid->bufsize = HID_MIN_BUFFER_SIZE;
1065 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
1066 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
1067 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
1068
1069 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
1070 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
1071
1072 hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
1073
1074 if (insize > HID_MAX_BUFFER_SIZE)
1075 insize = HID_MAX_BUFFER_SIZE;
1076
1077 if (hid_alloc_buffers(dev, hid)) {
1078 ret = -ENOMEM;
1079 goto fail;
1080 }
1081
1082 for (n = 0; n < interface->desc.bNumEndpoints; n++) {
1083 struct usb_endpoint_descriptor *endpoint;
1084 int pipe;
1085 int interval;
1086
1087 endpoint = &interface->endpoint[n].desc;
1088 if (!usb_endpoint_xfer_int(endpoint))
1089 continue;
1090
1091 interval = endpoint->bInterval;
1092
1093
1094 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
1095 dev->speed == USB_SPEED_HIGH) {
1096 interval = fls(endpoint->bInterval*8);
1097 pr_info("%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
1098 hid->name, endpoint->bInterval, interval);
1099 }
1100
1101
1102
1103
1104 switch (hid->collection->usage) {
1105 case HID_GD_MOUSE:
1106 if (hid_mousepoll_interval > 0)
1107 interval = hid_mousepoll_interval;
1108 break;
1109 case HID_GD_JOYSTICK:
1110 if (hid_jspoll_interval > 0)
1111 interval = hid_jspoll_interval;
1112 break;
1113 case HID_GD_KEYBOARD:
1114 if (hid_kbpoll_interval > 0)
1115 interval = hid_kbpoll_interval;
1116 break;
1117 }
1118
1119 ret = -ENOMEM;
1120 if (usb_endpoint_dir_in(endpoint)) {
1121 if (usbhid->urbin)
1122 continue;
1123 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
1124 goto fail;
1125 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
1126 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
1127 hid_irq_in, hid, interval);
1128 usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
1129 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1130 } else {
1131 if (usbhid->urbout)
1132 continue;
1133 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
1134 goto fail;
1135 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
1136 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
1137 hid_irq_out, hid, interval);
1138 usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
1139 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1140 }
1141 }
1142
1143 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
1144 if (!usbhid->urbctrl) {
1145 ret = -ENOMEM;
1146 goto fail;
1147 }
1148
1149 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
1150 usbhid->ctrlbuf, 1, hid_ctrl, hid);
1151 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
1152 usbhid->urbctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1153
1154 set_bit(HID_STARTED, &usbhid->iofl);
1155
1156 if (hid->quirks & HID_QUIRK_ALWAYS_POLL) {
1157 ret = usb_autopm_get_interface(usbhid->intf);
1158 if (ret)
1159 goto fail;
1160 set_bit(HID_IN_POLLING, &usbhid->iofl);
1161 usbhid->intf->needs_remote_wakeup = 1;
1162 ret = hid_start_in(hid);
1163 if (ret) {
1164 dev_err(&hid->dev,
1165 "failed to start in urb: %d\n", ret);
1166 }
1167 usb_autopm_put_interface(usbhid->intf);
1168 }
1169
1170
1171
1172
1173
1174
1175
1176 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1177 interface->desc.bInterfaceProtocol ==
1178 USB_INTERFACE_PROTOCOL_KEYBOARD) {
1179 usbhid_set_leds(hid);
1180 device_set_wakeup_enable(&dev->dev, 1);
1181 }
1182 return 0;
1183
1184fail:
1185 usb_free_urb(usbhid->urbin);
1186 usb_free_urb(usbhid->urbout);
1187 usb_free_urb(usbhid->urbctrl);
1188 usbhid->urbin = NULL;
1189 usbhid->urbout = NULL;
1190 usbhid->urbctrl = NULL;
1191 hid_free_buffers(dev, hid);
1192 return ret;
1193}
1194
1195static void usbhid_stop(struct hid_device *hid)
1196{
1197 struct usbhid_device *usbhid = hid->driver_data;
1198
1199 if (WARN_ON(!usbhid))
1200 return;
1201
1202 if (hid->quirks & HID_QUIRK_ALWAYS_POLL) {
1203 clear_bit(HID_IN_POLLING, &usbhid->iofl);
1204 usbhid->intf->needs_remote_wakeup = 0;
1205 }
1206
1207 clear_bit(HID_STARTED, &usbhid->iofl);
1208 spin_lock_irq(&usbhid->lock);
1209 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1210 spin_unlock_irq(&usbhid->lock);
1211 usb_kill_urb(usbhid->urbin);
1212 usb_kill_urb(usbhid->urbout);
1213 usb_kill_urb(usbhid->urbctrl);
1214
1215 hid_cancel_delayed_stuff(usbhid);
1216
1217 hid->claimed = 0;
1218
1219 usb_free_urb(usbhid->urbin);
1220 usb_free_urb(usbhid->urbctrl);
1221 usb_free_urb(usbhid->urbout);
1222 usbhid->urbin = NULL;
1223 usbhid->urbctrl = NULL;
1224 usbhid->urbout = NULL;
1225
1226 hid_free_buffers(hid_to_usb_dev(hid), hid);
1227}
1228
1229static int usbhid_power(struct hid_device *hid, int lvl)
1230{
1231 struct usbhid_device *usbhid = hid->driver_data;
1232 int r = 0;
1233
1234 switch (lvl) {
1235 case PM_HINT_FULLON:
1236 r = usb_autopm_get_interface(usbhid->intf);
1237 break;
1238
1239 case PM_HINT_NORMAL:
1240 usb_autopm_put_interface(usbhid->intf);
1241 break;
1242 }
1243
1244 return r;
1245}
1246
1247static void usbhid_request(struct hid_device *hid, struct hid_report *rep, int reqtype)
1248{
1249 switch (reqtype) {
1250 case HID_REQ_GET_REPORT:
1251 usbhid_submit_report(hid, rep, USB_DIR_IN);
1252 break;
1253 case HID_REQ_SET_REPORT:
1254 usbhid_submit_report(hid, rep, USB_DIR_OUT);
1255 break;
1256 }
1257}
1258
1259static int usbhid_raw_request(struct hid_device *hid, unsigned char reportnum,
1260 __u8 *buf, size_t len, unsigned char rtype,
1261 int reqtype)
1262{
1263 switch (reqtype) {
1264 case HID_REQ_GET_REPORT:
1265 return usbhid_get_raw_report(hid, reportnum, buf, len, rtype);
1266 case HID_REQ_SET_REPORT:
1267 return usbhid_set_raw_report(hid, reportnum, buf, len, rtype);
1268 default:
1269 return -EIO;
1270 }
1271}
1272
1273static int usbhid_idle(struct hid_device *hid, int report, int idle,
1274 int reqtype)
1275{
1276 struct usb_device *dev = hid_to_usb_dev(hid);
1277 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
1278 struct usb_host_interface *interface = intf->cur_altsetting;
1279 int ifnum = interface->desc.bInterfaceNumber;
1280
1281 if (reqtype != HID_REQ_SET_IDLE)
1282 return -EINVAL;
1283
1284 return hid_set_idle(dev, ifnum, report, idle);
1285}
1286
1287struct hid_ll_driver usb_hid_driver = {
1288 .parse = usbhid_parse,
1289 .start = usbhid_start,
1290 .stop = usbhid_stop,
1291 .open = usbhid_open,
1292 .close = usbhid_close,
1293 .power = usbhid_power,
1294 .request = usbhid_request,
1295 .wait = usbhid_wait_io,
1296 .raw_request = usbhid_raw_request,
1297 .output_report = usbhid_output_report,
1298 .idle = usbhid_idle,
1299};
1300EXPORT_SYMBOL_GPL(usb_hid_driver);
1301
1302static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1303{
1304 struct usb_host_interface *interface = intf->cur_altsetting;
1305 struct usb_device *dev = interface_to_usbdev(intf);
1306 struct usbhid_device *usbhid;
1307 struct hid_device *hid;
1308 unsigned int n, has_in = 0;
1309 size_t len;
1310 int ret;
1311
1312 dbg_hid("HID probe called for ifnum %d\n",
1313 intf->altsetting->desc.bInterfaceNumber);
1314
1315 for (n = 0; n < interface->desc.bNumEndpoints; n++)
1316 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1317 has_in++;
1318 if (!has_in) {
1319 hid_err(intf, "couldn't find an input interrupt endpoint\n");
1320 return -ENODEV;
1321 }
1322
1323 hid = hid_allocate_device();
1324 if (IS_ERR(hid))
1325 return PTR_ERR(hid);
1326
1327 usb_set_intfdata(intf, hid);
1328 hid->ll_driver = &usb_hid_driver;
1329 hid->ff_init = hid_pidff_init;
1330#ifdef CONFIG_USB_HIDDEV
1331 hid->hiddev_connect = hiddev_connect;
1332 hid->hiddev_disconnect = hiddev_disconnect;
1333 hid->hiddev_hid_event = hiddev_hid_event;
1334 hid->hiddev_report_event = hiddev_report_event;
1335#endif
1336 hid->dev.parent = &intf->dev;
1337 hid->bus = BUS_USB;
1338 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1339 hid->product = le16_to_cpu(dev->descriptor.idProduct);
1340 hid->version = le16_to_cpu(dev->descriptor.bcdDevice);
1341 hid->name[0] = 0;
1342 if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1343 USB_INTERFACE_PROTOCOL_MOUSE)
1344 hid->type = HID_TYPE_USBMOUSE;
1345 else if (intf->cur_altsetting->desc.bInterfaceProtocol == 0)
1346 hid->type = HID_TYPE_USBNONE;
1347
1348 if (dev->manufacturer)
1349 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1350
1351 if (dev->product) {
1352 if (dev->manufacturer)
1353 strlcat(hid->name, " ", sizeof(hid->name));
1354 strlcat(hid->name, dev->product, sizeof(hid->name));
1355 }
1356
1357 if (!strlen(hid->name))
1358 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1359 le16_to_cpu(dev->descriptor.idVendor),
1360 le16_to_cpu(dev->descriptor.idProduct));
1361
1362 usb_make_path(dev, hid->phys, sizeof(hid->phys));
1363 strlcat(hid->phys, "/input", sizeof(hid->phys));
1364 len = strlen(hid->phys);
1365 if (len < sizeof(hid->phys) - 1)
1366 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1367 "%d", intf->altsetting[0].desc.bInterfaceNumber);
1368
1369 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1370 hid->uniq[0] = 0;
1371
1372 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1373 if (usbhid == NULL) {
1374 ret = -ENOMEM;
1375 goto err;
1376 }
1377
1378 hid->driver_data = usbhid;
1379 usbhid->hid = hid;
1380 usbhid->intf = intf;
1381 usbhid->ifnum = interface->desc.bInterfaceNumber;
1382
1383 init_waitqueue_head(&usbhid->wait);
1384 INIT_WORK(&usbhid->reset_work, hid_reset);
1385 timer_setup(&usbhid->io_retry, hid_retry_timeout, 0);
1386 spin_lock_init(&usbhid->lock);
1387
1388 ret = hid_add_device(hid);
1389 if (ret) {
1390 if (ret != -ENODEV)
1391 hid_err(intf, "can't add hid device: %d\n", ret);
1392 goto err_free;
1393 }
1394
1395 return 0;
1396err_free:
1397 kfree(usbhid);
1398err:
1399 hid_destroy_device(hid);
1400 return ret;
1401}
1402
1403static void usbhid_disconnect(struct usb_interface *intf)
1404{
1405 struct hid_device *hid = usb_get_intfdata(intf);
1406 struct usbhid_device *usbhid;
1407
1408 if (WARN_ON(!hid))
1409 return;
1410
1411 usbhid = hid->driver_data;
1412 spin_lock_irq(&usbhid->lock);
1413 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1414 spin_unlock_irq(&usbhid->lock);
1415 hid_destroy_device(hid);
1416 kfree(usbhid);
1417}
1418
1419static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1420{
1421 del_timer_sync(&usbhid->io_retry);
1422 cancel_work_sync(&usbhid->reset_work);
1423}
1424
1425static void hid_cease_io(struct usbhid_device *usbhid)
1426{
1427 del_timer_sync(&usbhid->io_retry);
1428 usb_kill_urb(usbhid->urbin);
1429 usb_kill_urb(usbhid->urbctrl);
1430 usb_kill_urb(usbhid->urbout);
1431}
1432
1433static void hid_restart_io(struct hid_device *hid)
1434{
1435 struct usbhid_device *usbhid = hid->driver_data;
1436 int clear_halt = test_bit(HID_CLEAR_HALT, &usbhid->iofl);
1437 int reset_pending = test_bit(HID_RESET_PENDING, &usbhid->iofl);
1438
1439 spin_lock_irq(&usbhid->lock);
1440 clear_bit(HID_SUSPENDED, &usbhid->iofl);
1441 usbhid_mark_busy(usbhid);
1442
1443 if (clear_halt || reset_pending)
1444 schedule_work(&usbhid->reset_work);
1445 usbhid->retry_delay = 0;
1446 spin_unlock_irq(&usbhid->lock);
1447
1448 if (reset_pending || !test_bit(HID_STARTED, &usbhid->iofl))
1449 return;
1450
1451 if (!clear_halt) {
1452 if (hid_start_in(hid) < 0)
1453 hid_io_error(hid);
1454 }
1455
1456 spin_lock_irq(&usbhid->lock);
1457 if (usbhid->urbout && !test_bit(HID_OUT_RUNNING, &usbhid->iofl))
1458 usbhid_restart_out_queue(usbhid);
1459 if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
1460 usbhid_restart_ctrl_queue(usbhid);
1461 spin_unlock_irq(&usbhid->lock);
1462}
1463
1464
1465static int hid_pre_reset(struct usb_interface *intf)
1466{
1467 struct hid_device *hid = usb_get_intfdata(intf);
1468 struct usbhid_device *usbhid = hid->driver_data;
1469
1470 spin_lock_irq(&usbhid->lock);
1471 set_bit(HID_RESET_PENDING, &usbhid->iofl);
1472 spin_unlock_irq(&usbhid->lock);
1473 hid_cease_io(usbhid);
1474
1475 return 0;
1476}
1477
1478
1479static int hid_post_reset(struct usb_interface *intf)
1480{
1481 struct usb_device *dev = interface_to_usbdev (intf);
1482 struct hid_device *hid = usb_get_intfdata(intf);
1483 struct usbhid_device *usbhid = hid->driver_data;
1484 struct usb_host_interface *interface = intf->cur_altsetting;
1485 int status;
1486 char *rdesc;
1487
1488
1489
1490
1491
1492
1493 rdesc = kmalloc(hid->dev_rsize, GFP_KERNEL);
1494 if (!rdesc)
1495 return -ENOMEM;
1496
1497 status = hid_get_class_descriptor(dev,
1498 interface->desc.bInterfaceNumber,
1499 HID_DT_REPORT, rdesc, hid->dev_rsize);
1500 if (status < 0) {
1501 dbg_hid("reading report descriptor failed (post_reset)\n");
1502 kfree(rdesc);
1503 return status;
1504 }
1505 status = memcmp(rdesc, hid->dev_rdesc, hid->dev_rsize);
1506 kfree(rdesc);
1507 if (status != 0) {
1508 dbg_hid("report descriptor changed\n");
1509 return -EPERM;
1510 }
1511
1512
1513 spin_lock_irq(&usbhid->lock);
1514 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1515 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
1516 spin_unlock_irq(&usbhid->lock);
1517 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1518
1519 hid_restart_io(hid);
1520
1521 return 0;
1522}
1523
1524#ifdef CONFIG_PM
1525static int hid_resume_common(struct hid_device *hid, bool driver_suspended)
1526{
1527 int status = 0;
1528
1529 hid_restart_io(hid);
1530 if (driver_suspended && hid->driver && hid->driver->resume)
1531 status = hid->driver->resume(hid);
1532 return status;
1533}
1534
1535static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1536{
1537 struct hid_device *hid = usb_get_intfdata(intf);
1538 struct usbhid_device *usbhid = hid->driver_data;
1539 int status = 0;
1540 bool driver_suspended = false;
1541 unsigned int ledcount;
1542
1543 if (PMSG_IS_AUTO(message)) {
1544 ledcount = hidinput_count_leds(hid);
1545 spin_lock_irq(&usbhid->lock);
1546 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1547 && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1548 && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1549 && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1550 && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1551 && (!ledcount || ignoreled))
1552 {
1553 set_bit(HID_SUSPENDED, &usbhid->iofl);
1554 spin_unlock_irq(&usbhid->lock);
1555 if (hid->driver && hid->driver->suspend) {
1556 status = hid->driver->suspend(hid, message);
1557 if (status < 0)
1558 goto failed;
1559 }
1560 driver_suspended = true;
1561 } else {
1562 usbhid_mark_busy(usbhid);
1563 spin_unlock_irq(&usbhid->lock);
1564 return -EBUSY;
1565 }
1566
1567 } else {
1568
1569 if (hid->driver && hid->driver->suspend)
1570 status = hid->driver->suspend(hid, message);
1571 driver_suspended = true;
1572 spin_lock_irq(&usbhid->lock);
1573 set_bit(HID_SUSPENDED, &usbhid->iofl);
1574 spin_unlock_irq(&usbhid->lock);
1575 if (usbhid_wait_io(hid) < 0)
1576 status = -EIO;
1577 }
1578
1579 hid_cancel_delayed_stuff(usbhid);
1580 hid_cease_io(usbhid);
1581
1582 if (PMSG_IS_AUTO(message) && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1583
1584 status = -EBUSY;
1585 goto failed;
1586 }
1587 dev_dbg(&intf->dev, "suspend\n");
1588 return status;
1589
1590 failed:
1591 hid_resume_common(hid, driver_suspended);
1592 return status;
1593}
1594
1595static int hid_resume(struct usb_interface *intf)
1596{
1597 struct hid_device *hid = usb_get_intfdata (intf);
1598 int status;
1599
1600 status = hid_resume_common(hid, true);
1601 dev_dbg(&intf->dev, "resume status %d\n", status);
1602 return 0;
1603}
1604
1605static int hid_reset_resume(struct usb_interface *intf)
1606{
1607 struct hid_device *hid = usb_get_intfdata(intf);
1608 int status;
1609
1610 status = hid_post_reset(intf);
1611 if (status >= 0 && hid->driver && hid->driver->reset_resume) {
1612 int ret = hid->driver->reset_resume(hid);
1613 if (ret < 0)
1614 status = ret;
1615 }
1616 return status;
1617}
1618
1619#endif
1620
1621static const struct usb_device_id hid_usb_ids[] = {
1622 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1623 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1624 { }
1625};
1626
1627MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1628
1629static struct usb_driver hid_driver = {
1630 .name = "usbhid",
1631 .probe = usbhid_probe,
1632 .disconnect = usbhid_disconnect,
1633#ifdef CONFIG_PM
1634 .suspend = hid_suspend,
1635 .resume = hid_resume,
1636 .reset_resume = hid_reset_resume,
1637#endif
1638 .pre_reset = hid_pre_reset,
1639 .post_reset = hid_post_reset,
1640 .id_table = hid_usb_ids,
1641 .supports_autosuspend = 1,
1642};
1643
1644struct usb_interface *usbhid_find_interface(int minor)
1645{
1646 return usb_find_interface(&hid_driver, minor);
1647}
1648
1649static int __init hid_init(void)
1650{
1651 int retval = -ENOMEM;
1652
1653 retval = hid_quirks_init(quirks_param, BUS_USB, MAX_USBHID_BOOT_QUIRKS);
1654 if (retval)
1655 goto usbhid_quirks_init_fail;
1656 retval = usb_register(&hid_driver);
1657 if (retval)
1658 goto usb_register_fail;
1659 pr_info(KBUILD_MODNAME ": " DRIVER_DESC "\n");
1660
1661 return 0;
1662usb_register_fail:
1663 hid_quirks_exit(BUS_USB);
1664usbhid_quirks_init_fail:
1665 return retval;
1666}
1667
1668static void __exit hid_exit(void)
1669{
1670 usb_deregister(&hid_driver);
1671 hid_quirks_exit(BUS_USB);
1672}
1673
1674module_init(hid_init);
1675module_exit(hid_exit);
1676
1677MODULE_AUTHOR("Andreas Gal");
1678MODULE_AUTHOR("Vojtech Pavlik");
1679MODULE_AUTHOR("Jiri Kosina");
1680MODULE_DESCRIPTION(DRIVER_DESC);
1681MODULE_LICENSE("GPL");
1682
