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