2 * USB HID support for Linux
4 * Copyright (c) 1999 Andreas Gal
5 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
6 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
7 * Copyright (c) 2007-2008 Oliver Neukum
8 * Copyright (c) 2006-2010 Jiri Kosina
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the Free
14 * Software Foundation; either version 2 of the License, or (at your option)
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>
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>
32 #include <linux/usb.h>
34 #include <linux/hid.h>
35 #include <linux/hiddev.h>
36 #include <linux/hid-debug.h>
37 #include <linux/hidraw.h>
44 #define DRIVER_DESC "USB HID core driver"
45 #define DRIVER_LICENSE "GPL"
51 static unsigned int hid_mousepoll_interval;
52 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
53 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
55 static unsigned int ignoreled;
56 module_param_named(ignoreled, ignoreled, uint, 0644);
57 MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds");
59 /* Quirks specified at module load time */
60 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
61 module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
62 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
63 " quirks=vendorID:productID:quirks"
64 " where vendorID, productID, and quirks are all in"
67 * Input submission and I/O error handler.
69 static DEFINE_MUTEX(hid_open_mut);
71 static void hid_io_error(struct hid_device *hid);
72 static int hid_submit_out(struct hid_device *hid);
73 static int hid_submit_ctrl(struct hid_device *hid);
74 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid);
76 /* Start up the input URB */
77 static int hid_start_in(struct hid_device *hid)
81 struct usbhid_device *usbhid = hid->driver_data;
83 spin_lock_irqsave(&usbhid->lock, flags);
85 !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
86 !test_bit(HID_REPORTED_IDLE, &usbhid->iofl) &&
87 !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
88 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
90 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
92 spin_unlock_irqrestore(&usbhid->lock, flags);
96 /* I/O retry timer routine */
97 static void hid_retry_timeout(unsigned long _hid)
99 struct hid_device *hid = (struct hid_device *) _hid;
100 struct usbhid_device *usbhid = hid->driver_data;
102 dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
103 if (hid_start_in(hid))
107 /* Workqueue routine to reset the device or clear a halt */
108 static void hid_reset(struct work_struct *work)
110 struct usbhid_device *usbhid =
111 container_of(work, struct usbhid_device, reset_work);
112 struct hid_device *hid = usbhid->hid;
115 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
116 dev_dbg(&usbhid->intf->dev, "clear halt\n");
117 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
118 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
122 else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
123 dev_dbg(&usbhid->intf->dev, "resetting device\n");
124 rc = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
126 rc = usb_reset_device(hid_to_usb_dev(hid));
127 usb_unlock_device(hid_to_usb_dev(hid));
129 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
134 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
138 hid_err(hid, "can't reset device, %s-%s/input%d, status %d\n",
139 hid_to_usb_dev(hid)->bus->bus_name,
140 hid_to_usb_dev(hid)->devpath,
150 /* Main I/O error handler */
151 static void hid_io_error(struct hid_device *hid)
154 struct usbhid_device *usbhid = hid->driver_data;
156 spin_lock_irqsave(&usbhid->lock, flags);
158 /* Stop when disconnected */
159 if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
162 /* If it has been a while since the last error, we'll assume
163 * this a brand new error and reset the retry timeout. */
164 if (time_after(jiffies, usbhid->stop_retry + HZ/2))
165 usbhid->retry_delay = 0;
167 /* When an error occurs, retry at increasing intervals */
168 if (usbhid->retry_delay == 0) {
169 usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */
170 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
171 } else if (usbhid->retry_delay < 100)
172 usbhid->retry_delay *= 2;
174 if (time_after(jiffies, usbhid->stop_retry)) {
176 /* Retries failed, so do a port reset */
177 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
178 schedule_work(&usbhid->reset_work);
183 mod_timer(&usbhid->io_retry,
184 jiffies + msecs_to_jiffies(usbhid->retry_delay));
186 spin_unlock_irqrestore(&usbhid->lock, flags);
189 static void usbhid_mark_busy(struct usbhid_device *usbhid)
191 struct usb_interface *intf = usbhid->intf;
193 usb_mark_last_busy(interface_to_usbdev(intf));
196 static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
198 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
205 if ((kicked = (usbhid->outhead != usbhid->outtail))) {
206 dbg("Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
208 r = usb_autopm_get_interface_async(usbhid->intf);
211 /* Asynchronously flush queue. */
212 set_bit(HID_OUT_RUNNING, &usbhid->iofl);
213 if (hid_submit_out(hid)) {
214 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
215 usb_autopm_put_interface_async(usbhid->intf);
217 wake_up(&usbhid->wait);
222 static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
224 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
228 WARN_ON(hid == NULL);
232 if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
233 dbg("Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
235 r = usb_autopm_get_interface_async(usbhid->intf);
238 /* Asynchronously flush queue. */
239 set_bit(HID_CTRL_RUNNING, &usbhid->iofl);
240 if (hid_submit_ctrl(hid)) {
241 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
242 usb_autopm_put_interface_async(usbhid->intf);
244 wake_up(&usbhid->wait);
250 * Input interrupt completion handler.
253 static void hid_irq_in(struct urb *urb)
255 struct hid_device *hid = urb->context;
256 struct usbhid_device *usbhid = hid->driver_data;
259 switch (urb->status) {
260 case 0: /* success */
261 usbhid_mark_busy(usbhid);
262 usbhid->retry_delay = 0;
263 hid_input_report(urb->context, HID_INPUT_REPORT,
264 urb->transfer_buffer,
265 urb->actual_length, 1);
267 * autosuspend refused while keys are pressed
268 * because most keyboards don't wake up when
271 if (hid_check_keys_pressed(hid))
272 set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
274 clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
276 case -EPIPE: /* stall */
277 usbhid_mark_busy(usbhid);
278 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
279 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
280 schedule_work(&usbhid->reset_work);
282 case -ECONNRESET: /* unlink */
284 case -ESHUTDOWN: /* unplug */
285 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
287 case -EILSEQ: /* protocol error or unplug */
288 case -EPROTO: /* protocol error or unplug */
289 case -ETIME: /* protocol error or unplug */
290 case -ETIMEDOUT: /* Should never happen, but... */
291 usbhid_mark_busy(usbhid);
292 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
296 hid_warn(urb->dev, "input irq status %d received\n",
300 status = usb_submit_urb(urb, GFP_ATOMIC);
302 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
303 if (status != -EPERM) {
304 hid_err(hid, "can't resubmit intr, %s-%s/input%d, status %d\n",
305 hid_to_usb_dev(hid)->bus->bus_name,
306 hid_to_usb_dev(hid)->devpath,
307 usbhid->ifnum, status);
313 static int hid_submit_out(struct hid_device *hid)
315 struct hid_report *report;
317 struct usbhid_device *usbhid = hid->driver_data;
320 report = usbhid->out[usbhid->outtail].report;
321 raw_report = usbhid->out[usbhid->outtail].raw_report;
323 usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) +
324 1 + (report->id > 0);
325 usbhid->urbout->dev = hid_to_usb_dev(hid);
326 memcpy(usbhid->outbuf, raw_report,
327 usbhid->urbout->transfer_buffer_length);
330 dbg_hid("submitting out urb\n");
332 r = usb_submit_urb(usbhid->urbout, GFP_ATOMIC);
334 hid_err(hid, "usb_submit_urb(out) failed: %d\n", r);
337 usbhid->last_out = jiffies;
341 static int hid_submit_ctrl(struct hid_device *hid)
343 struct hid_report *report;
347 struct usbhid_device *usbhid = hid->driver_data;
349 report = usbhid->ctrl[usbhid->ctrltail].report;
350 raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
351 dir = usbhid->ctrl[usbhid->ctrltail].dir;
353 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
354 if (dir == USB_DIR_OUT) {
355 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
356 usbhid->urbctrl->transfer_buffer_length = len;
357 memcpy(usbhid->ctrlbuf, raw_report, len);
360 int maxpacket, padlen;
362 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
363 maxpacket = usb_maxpacket(hid_to_usb_dev(hid),
364 usbhid->urbctrl->pipe, 0);
366 padlen = DIV_ROUND_UP(len, maxpacket);
368 if (padlen > usbhid->bufsize)
369 padlen = usbhid->bufsize;
372 usbhid->urbctrl->transfer_buffer_length = padlen;
374 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
376 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
377 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT :
379 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) |
381 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
382 usbhid->cr->wLength = cpu_to_le16(len);
384 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
385 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" :
387 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
389 r = usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC);
391 hid_err(hid, "usb_submit_urb(ctrl) failed: %d\n", r);
394 usbhid->last_ctrl = jiffies;
399 * Output interrupt completion handler.
402 static void hid_irq_out(struct urb *urb)
404 struct hid_device *hid = urb->context;
405 struct usbhid_device *usbhid = hid->driver_data;
409 switch (urb->status) {
410 case 0: /* success */
412 case -ESHUTDOWN: /* unplug */
414 case -EILSEQ: /* protocol error or unplug */
415 case -EPROTO: /* protocol error or unplug */
416 case -ECONNRESET: /* unlink */
420 hid_warn(urb->dev, "output irq status %d received\n",
424 spin_lock_irqsave(&usbhid->lock, flags);
427 usbhid->outtail = usbhid->outhead;
429 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
431 if (usbhid->outhead != usbhid->outtail && !hid_submit_out(hid)) {
432 /* Successfully submitted next urb in queue */
433 spin_unlock_irqrestore(&usbhid->lock, flags);
437 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
438 spin_unlock_irqrestore(&usbhid->lock, flags);
439 usb_autopm_put_interface_async(usbhid->intf);
440 wake_up(&usbhid->wait);
444 * Control pipe completion handler.
447 static void hid_ctrl(struct urb *urb)
449 struct hid_device *hid = urb->context;
450 struct usbhid_device *usbhid = hid->driver_data;
451 int unplug = 0, status = urb->status;
453 spin_lock(&usbhid->lock);
456 case 0: /* success */
457 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
458 hid_input_report(urb->context,
459 usbhid->ctrl[usbhid->ctrltail].report->type,
460 urb->transfer_buffer, urb->actual_length, 0);
462 case -ESHUTDOWN: /* unplug */
464 case -EILSEQ: /* protocol error or unplug */
465 case -EPROTO: /* protocol error or unplug */
466 case -ECONNRESET: /* unlink */
468 case -EPIPE: /* report not available */
471 hid_warn(urb->dev, "ctrl urb status %d received\n", status);
475 usbhid->ctrltail = usbhid->ctrlhead;
477 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
479 if (usbhid->ctrlhead != usbhid->ctrltail && !hid_submit_ctrl(hid)) {
480 /* Successfully submitted next urb in queue */
481 spin_unlock(&usbhid->lock);
485 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
486 spin_unlock(&usbhid->lock);
487 usb_autopm_put_interface_async(usbhid->intf);
488 wake_up(&usbhid->wait);
491 static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
495 struct usbhid_device *usbhid = hid->driver_data;
496 int len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
498 if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
501 if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
502 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
503 hid_warn(hid, "output queue full\n");
507 usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC);
508 if (!usbhid->out[usbhid->outhead].raw_report) {
509 hid_warn(hid, "output queueing failed\n");
512 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
513 usbhid->out[usbhid->outhead].report = report;
514 usbhid->outhead = head;
516 /* Try to awake from autosuspend... */
517 if (usb_autopm_get_interface_async(usbhid->intf) < 0)
521 * But if still suspended, leave urb enqueued, don't submit.
522 * Submission will occur if/when resume() drains the queue.
524 if (test_bit(HID_REPORTED_IDLE, &usbhid->iofl))
527 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl)) {
528 if (hid_submit_out(hid)) {
529 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
530 usb_autopm_put_interface_async(usbhid->intf);
532 wake_up(&usbhid->wait);
535 * the queue is known to run
536 * but an earlier request may be stuck
537 * we may need to time out
538 * no race because this is called under
541 if (time_after(jiffies, usbhid->last_out + HZ * 5))
542 usb_unlink_urb(usbhid->urbout);
547 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
548 hid_warn(hid, "control queue full\n");
552 if (dir == USB_DIR_OUT) {
553 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC);
554 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
555 hid_warn(hid, "control queueing failed\n");
558 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
560 usbhid->ctrl[usbhid->ctrlhead].report = report;
561 usbhid->ctrl[usbhid->ctrlhead].dir = dir;
562 usbhid->ctrlhead = head;
564 /* Try to awake from autosuspend... */
565 if (usb_autopm_get_interface_async(usbhid->intf) < 0)
569 * If already suspended, leave urb enqueued, but don't submit.
570 * Submission will occur if/when resume() drains the queue.
572 if (test_bit(HID_REPORTED_IDLE, &usbhid->iofl))
575 if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl)) {
576 if (hid_submit_ctrl(hid)) {
577 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
578 usb_autopm_put_interface_async(usbhid->intf);
580 wake_up(&usbhid->wait);
583 * the queue is known to run
584 * but an earlier request may be stuck
585 * we may need to time out
586 * no race because this is called under
589 if (time_after(jiffies, usbhid->last_ctrl + HZ * 5))
590 usb_unlink_urb(usbhid->urbctrl);
594 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
596 struct usbhid_device *usbhid = hid->driver_data;
599 spin_lock_irqsave(&usbhid->lock, flags);
600 __usbhid_submit_report(hid, report, dir);
601 spin_unlock_irqrestore(&usbhid->lock, flags);
603 EXPORT_SYMBOL_GPL(usbhid_submit_report);
605 /* Workqueue routine to send requests to change LEDs */
606 static void hid_led(struct work_struct *work)
608 struct usbhid_device *usbhid =
609 container_of(work, struct usbhid_device, led_work);
610 struct hid_device *hid = usbhid->hid;
611 struct hid_field *field;
614 field = hidinput_get_led_field(hid);
616 hid_warn(hid, "LED event field not found\n");
620 spin_lock_irqsave(&usbhid->lock, flags);
621 if (!test_bit(HID_DISCONNECTED, &usbhid->iofl)) {
622 usbhid->ledcount = hidinput_count_leds(hid);
623 hid_dbg(usbhid->hid, "New ledcount = %u\n", usbhid->ledcount);
624 __usbhid_submit_report(hid, field->report, USB_DIR_OUT);
626 spin_unlock_irqrestore(&usbhid->lock, flags);
629 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
631 struct hid_device *hid = input_get_drvdata(dev);
632 struct usbhid_device *usbhid = hid->driver_data;
633 struct hid_field *field;
638 return input_ff_event(dev, type, code, value);
643 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
644 hid_warn(dev, "event field not found\n");
648 spin_lock_irqsave(&usbhid->lock, flags);
649 hid_set_field(field, offset, value);
650 spin_unlock_irqrestore(&usbhid->lock, flags);
653 * Defer performing requested LED action.
654 * This is more likely gather all LED changes into a single URB.
656 schedule_work(&usbhid->led_work);
661 int usbhid_wait_io(struct hid_device *hid)
663 struct usbhid_device *usbhid = hid->driver_data;
665 if (!wait_event_timeout(usbhid->wait,
666 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
667 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
669 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
675 EXPORT_SYMBOL_GPL(usbhid_wait_io);
677 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
679 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
680 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
681 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
684 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
685 unsigned char type, void *buf, int size)
687 int result, retries = 4;
689 memset(buf, 0, size);
692 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
693 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
694 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
696 } while (result < size && retries);
700 int usbhid_open(struct hid_device *hid)
702 struct usbhid_device *usbhid = hid->driver_data;
705 mutex_lock(&hid_open_mut);
707 res = usb_autopm_get_interface(usbhid->intf);
708 /* the device must be awake to reliably request remote wakeup */
711 mutex_unlock(&hid_open_mut);
714 usbhid->intf->needs_remote_wakeup = 1;
715 if (hid_start_in(hid))
718 usb_autopm_put_interface(usbhid->intf);
720 mutex_unlock(&hid_open_mut);
724 void usbhid_close(struct hid_device *hid)
726 struct usbhid_device *usbhid = hid->driver_data;
728 mutex_lock(&hid_open_mut);
730 /* protecting hid->open to make sure we don't restart
731 * data acquistion due to a resumption we no longer
734 spin_lock_irq(&usbhid->lock);
736 spin_unlock_irq(&usbhid->lock);
737 hid_cancel_delayed_stuff(usbhid);
738 usb_kill_urb(usbhid->urbin);
739 usbhid->intf->needs_remote_wakeup = 0;
741 spin_unlock_irq(&usbhid->lock);
743 mutex_unlock(&hid_open_mut);
747 * Initialize all reports
750 void usbhid_init_reports(struct hid_device *hid)
752 struct hid_report *report;
753 struct usbhid_device *usbhid = hid->driver_data;
756 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
757 usbhid_submit_report(hid, report, USB_DIR_IN);
759 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
760 usbhid_submit_report(hid, report, USB_DIR_IN);
763 ret = usbhid_wait_io(hid);
766 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
767 usb_kill_urb(usbhid->urbctrl);
768 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
769 usb_kill_urb(usbhid->urbout);
770 ret = usbhid_wait_io(hid);
774 hid_warn(hid, "timeout initializing reports\n");
778 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
780 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
781 unsigned int hid_code, struct hid_field **pfield)
783 struct hid_report *report;
784 struct hid_field *field;
785 struct hid_usage *usage;
788 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
789 for (i = 0; i < report->maxfield; i++) {
790 field = report->field[i];
791 for (j = 0; j < field->maxusage; j++) {
792 usage = &field->usage[j];
793 if ((usage->hid & HID_USAGE_PAGE) == page &&
794 (usage->hid & 0xFFFF) == hid_code) {
804 void usbhid_set_leds(struct hid_device *hid)
806 struct hid_field *field;
809 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
810 hid_set_field(field, offset, 0);
811 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
814 EXPORT_SYMBOL_GPL(usbhid_set_leds);
817 * Traverse the supplied list of reports and find the longest
819 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
822 struct hid_report *report;
825 list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
826 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
832 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
834 struct usbhid_device *usbhid = hid->driver_data;
836 usbhid->inbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
838 usbhid->outbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
839 &usbhid->outbuf_dma);
840 usbhid->cr = kmalloc(sizeof(*usbhid->cr), GFP_KERNEL);
841 usbhid->ctrlbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
842 &usbhid->ctrlbuf_dma);
843 if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
850 static int usbhid_get_raw_report(struct hid_device *hid,
851 unsigned char report_number, __u8 *buf, size_t count,
852 unsigned char report_type)
854 struct usbhid_device *usbhid = hid->driver_data;
855 struct usb_device *dev = hid_to_usb_dev(hid);
856 struct usb_interface *intf = usbhid->intf;
857 struct usb_host_interface *interface = intf->cur_altsetting;
858 int skipped_report_id = 0;
861 /* Byte 0 is the report number. Report data starts at byte 1.*/
862 buf[0] = report_number;
863 if (report_number == 0x0) {
864 /* Offset the return buffer by 1, so that the report ID
865 will remain in byte 0. */
868 skipped_report_id = 1;
870 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
872 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
873 ((report_type + 1) << 8) | report_number,
874 interface->desc.bInterfaceNumber, buf, count,
875 USB_CTRL_SET_TIMEOUT);
877 /* count also the report id */
878 if (ret > 0 && skipped_report_id)
884 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count,
885 unsigned char report_type)
887 struct usbhid_device *usbhid = hid->driver_data;
888 struct usb_device *dev = hid_to_usb_dev(hid);
889 struct usb_interface *intf = usbhid->intf;
890 struct usb_host_interface *interface = intf->cur_altsetting;
893 if (usbhid->urbout && report_type != HID_FEATURE_REPORT) {
895 int skipped_report_id = 0;
898 /* Don't send the Report ID */
901 skipped_report_id = 1;
903 ret = usb_interrupt_msg(dev, usbhid->urbout->pipe,
904 buf, count, &actual_length,
905 USB_CTRL_SET_TIMEOUT);
906 /* return the number of bytes transferred */
909 /* count also the report id */
910 if (skipped_report_id)
914 int skipped_report_id = 0;
915 int report_id = buf[0];
917 /* Don't send the Report ID */
920 skipped_report_id = 1;
922 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
924 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
925 ((report_type + 1) << 8) | report_id,
926 interface->desc.bInterfaceNumber, buf, count,
927 USB_CTRL_SET_TIMEOUT);
928 /* count also the report id, if this was a numbered report. */
929 if (ret > 0 && skipped_report_id)
936 static void usbhid_restart_queues(struct usbhid_device *usbhid)
939 usbhid_restart_out_queue(usbhid);
940 usbhid_restart_ctrl_queue(usbhid);
943 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
945 struct usbhid_device *usbhid = hid->driver_data;
947 usb_free_coherent(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
948 usb_free_coherent(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
950 usb_free_coherent(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
953 static int usbhid_parse(struct hid_device *hid)
955 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
956 struct usb_host_interface *interface = intf->cur_altsetting;
957 struct usb_device *dev = interface_to_usbdev (intf);
958 struct hid_descriptor *hdesc;
960 unsigned int rsize = 0;
964 quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
965 le16_to_cpu(dev->descriptor.idProduct));
967 if (quirks & HID_QUIRK_IGNORE)
970 /* Many keyboards and mice don't like to be polled for reports,
971 * so we will always set the HID_QUIRK_NOGET flag for them. */
972 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
973 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
974 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
975 quirks |= HID_QUIRK_NOGET;
978 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
979 (!interface->desc.bNumEndpoints ||
980 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
981 dbg_hid("class descriptor not present\n");
985 hid->version = le16_to_cpu(hdesc->bcdHID);
986 hid->country = hdesc->bCountryCode;
988 for (n = 0; n < hdesc->bNumDescriptors; n++)
989 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
990 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
992 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
993 dbg_hid("weird size of report descriptor (%u)\n", rsize);
997 if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
998 dbg_hid("couldn't allocate rdesc memory\n");
1002 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
1004 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
1005 HID_DT_REPORT, rdesc, rsize);
1007 dbg_hid("reading report descriptor failed\n");
1012 ret = hid_parse_report(hid, rdesc, rsize);
1015 dbg_hid("parsing report descriptor failed\n");
1019 hid->quirks |= quirks;
1026 static int usbhid_start(struct hid_device *hid)
1028 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
1029 struct usb_host_interface *interface = intf->cur_altsetting;
1030 struct usb_device *dev = interface_to_usbdev(intf);
1031 struct usbhid_device *usbhid = hid->driver_data;
1032 unsigned int n, insize = 0;
1035 clear_bit(HID_DISCONNECTED, &usbhid->iofl);
1037 usbhid->bufsize = HID_MIN_BUFFER_SIZE;
1038 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
1039 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
1040 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
1042 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
1043 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
1045 hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
1047 if (insize > HID_MAX_BUFFER_SIZE)
1048 insize = HID_MAX_BUFFER_SIZE;
1050 if (hid_alloc_buffers(dev, hid)) {
1055 for (n = 0; n < interface->desc.bNumEndpoints; n++) {
1056 struct usb_endpoint_descriptor *endpoint;
1060 endpoint = &interface->endpoint[n].desc;
1061 if (!usb_endpoint_xfer_int(endpoint))
1064 interval = endpoint->bInterval;
1066 /* Some vendors give fullspeed interval on highspeed devides */
1067 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
1068 dev->speed == USB_SPEED_HIGH) {
1069 interval = fls(endpoint->bInterval*8);
1070 printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
1071 hid->name, endpoint->bInterval, interval);
1074 /* Change the polling interval of mice. */
1075 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
1076 interval = hid_mousepoll_interval;
1079 if (usb_endpoint_dir_in(endpoint)) {
1082 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
1084 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
1085 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
1086 hid_irq_in, hid, interval);
1087 usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
1088 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1092 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
1094 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
1095 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
1096 hid_irq_out, hid, interval);
1097 usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
1098 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1102 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
1103 if (!usbhid->urbctrl) {
1108 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
1109 usbhid->ctrlbuf, 1, hid_ctrl, hid);
1110 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
1111 usbhid->urbctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1113 if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS))
1114 usbhid_init_reports(hid);
1116 set_bit(HID_STARTED, &usbhid->iofl);
1118 /* Some keyboards don't work until their LEDs have been set.
1119 * Since BIOSes do set the LEDs, it must be safe for any device
1120 * that supports the keyboard boot protocol.
1121 * In addition, enable remote wakeup by default for all keyboard
1122 * devices supporting the boot protocol.
1124 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1125 interface->desc.bInterfaceProtocol ==
1126 USB_INTERFACE_PROTOCOL_KEYBOARD) {
1127 usbhid_set_leds(hid);
1128 device_set_wakeup_enable(&dev->dev, 1);
1133 usb_free_urb(usbhid->urbin);
1134 usb_free_urb(usbhid->urbout);
1135 usb_free_urb(usbhid->urbctrl);
1136 usbhid->urbin = NULL;
1137 usbhid->urbout = NULL;
1138 usbhid->urbctrl = NULL;
1139 hid_free_buffers(dev, hid);
1143 static void usbhid_stop(struct hid_device *hid)
1145 struct usbhid_device *usbhid = hid->driver_data;
1147 if (WARN_ON(!usbhid))
1150 clear_bit(HID_STARTED, &usbhid->iofl);
1151 spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */
1152 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1153 spin_unlock_irq(&usbhid->lock);
1154 usb_kill_urb(usbhid->urbin);
1155 usb_kill_urb(usbhid->urbout);
1156 usb_kill_urb(usbhid->urbctrl);
1158 hid_cancel_delayed_stuff(usbhid);
1162 usb_free_urb(usbhid->urbin);
1163 usb_free_urb(usbhid->urbctrl);
1164 usb_free_urb(usbhid->urbout);
1165 usbhid->urbin = NULL; /* don't mess up next start */
1166 usbhid->urbctrl = NULL;
1167 usbhid->urbout = NULL;
1169 hid_free_buffers(hid_to_usb_dev(hid), hid);
1172 static int usbhid_power(struct hid_device *hid, int lvl)
1177 case PM_HINT_FULLON:
1178 r = usbhid_get_power(hid);
1180 case PM_HINT_NORMAL:
1181 usbhid_put_power(hid);
1187 static struct hid_ll_driver usb_hid_driver = {
1188 .parse = usbhid_parse,
1189 .start = usbhid_start,
1190 .stop = usbhid_stop,
1191 .open = usbhid_open,
1192 .close = usbhid_close,
1193 .power = usbhid_power,
1194 .hidinput_input_event = usb_hidinput_input_event,
1197 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1199 struct usb_host_interface *interface = intf->cur_altsetting;
1200 struct usb_device *dev = interface_to_usbdev(intf);
1201 struct usbhid_device *usbhid;
1202 struct hid_device *hid;
1203 unsigned int n, has_in = 0;
1207 dbg_hid("HID probe called for ifnum %d\n",
1208 intf->altsetting->desc.bInterfaceNumber);
1210 for (n = 0; n < interface->desc.bNumEndpoints; n++)
1211 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1214 hid_err(intf, "couldn't find an input interrupt endpoint\n");
1218 hid = hid_allocate_device();
1220 return PTR_ERR(hid);
1222 usb_set_intfdata(intf, hid);
1223 hid->ll_driver = &usb_hid_driver;
1224 hid->hid_get_raw_report = usbhid_get_raw_report;
1225 hid->hid_output_raw_report = usbhid_output_raw_report;
1226 hid->ff_init = hid_pidff_init;
1227 #ifdef CONFIG_USB_HIDDEV
1228 hid->hiddev_connect = hiddev_connect;
1229 hid->hiddev_disconnect = hiddev_disconnect;
1230 hid->hiddev_hid_event = hiddev_hid_event;
1231 hid->hiddev_report_event = hiddev_report_event;
1233 hid->dev.parent = &intf->dev;
1235 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1236 hid->product = le16_to_cpu(dev->descriptor.idProduct);
1238 hid->quirks = usbhid_lookup_quirk(hid->vendor, hid->product);
1239 if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1240 USB_INTERFACE_PROTOCOL_MOUSE)
1241 hid->type = HID_TYPE_USBMOUSE;
1242 else if (intf->cur_altsetting->desc.bInterfaceProtocol == 0)
1243 hid->type = HID_TYPE_USBNONE;
1245 if (dev->manufacturer)
1246 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1249 if (dev->manufacturer)
1250 strlcat(hid->name, " ", sizeof(hid->name));
1251 strlcat(hid->name, dev->product, sizeof(hid->name));
1254 if (!strlen(hid->name))
1255 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1256 le16_to_cpu(dev->descriptor.idVendor),
1257 le16_to_cpu(dev->descriptor.idProduct));
1259 usb_make_path(dev, hid->phys, sizeof(hid->phys));
1260 strlcat(hid->phys, "/input", sizeof(hid->phys));
1261 len = strlen(hid->phys);
1262 if (len < sizeof(hid->phys) - 1)
1263 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1264 "%d", intf->altsetting[0].desc.bInterfaceNumber);
1266 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1269 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1270 if (usbhid == NULL) {
1275 hid->driver_data = usbhid;
1277 usbhid->intf = intf;
1278 usbhid->ifnum = interface->desc.bInterfaceNumber;
1280 init_waitqueue_head(&usbhid->wait);
1281 INIT_WORK(&usbhid->reset_work, hid_reset);
1282 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
1283 spin_lock_init(&usbhid->lock);
1285 INIT_WORK(&usbhid->led_work, hid_led);
1287 ret = hid_add_device(hid);
1290 hid_err(intf, "can't add hid device: %d\n", ret);
1298 hid_destroy_device(hid);
1302 static void usbhid_disconnect(struct usb_interface *intf)
1304 struct hid_device *hid = usb_get_intfdata(intf);
1305 struct usbhid_device *usbhid;
1310 usbhid = hid->driver_data;
1311 hid_destroy_device(hid);
1315 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1317 del_timer_sync(&usbhid->io_retry);
1318 cancel_work_sync(&usbhid->reset_work);
1319 cancel_work_sync(&usbhid->led_work);
1322 static void hid_cease_io(struct usbhid_device *usbhid)
1324 del_timer_sync(&usbhid->io_retry);
1325 usb_kill_urb(usbhid->urbin);
1326 usb_kill_urb(usbhid->urbctrl);
1327 usb_kill_urb(usbhid->urbout);
1330 /* Treat USB reset pretty much the same as suspend/resume */
1331 static int hid_pre_reset(struct usb_interface *intf)
1333 struct hid_device *hid = usb_get_intfdata(intf);
1334 struct usbhid_device *usbhid = hid->driver_data;
1336 spin_lock_irq(&usbhid->lock);
1337 set_bit(HID_RESET_PENDING, &usbhid->iofl);
1338 spin_unlock_irq(&usbhid->lock);
1339 hid_cease_io(usbhid);
1344 /* Same routine used for post_reset and reset_resume */
1345 static int hid_post_reset(struct usb_interface *intf)
1347 struct usb_device *dev = interface_to_usbdev (intf);
1348 struct hid_device *hid = usb_get_intfdata(intf);
1349 struct usbhid_device *usbhid = hid->driver_data;
1352 spin_lock_irq(&usbhid->lock);
1353 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1354 spin_unlock_irq(&usbhid->lock);
1355 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1356 status = hid_start_in(hid);
1359 usbhid_restart_queues(usbhid);
1364 int usbhid_get_power(struct hid_device *hid)
1366 struct usbhid_device *usbhid = hid->driver_data;
1368 return usb_autopm_get_interface(usbhid->intf);
1371 void usbhid_put_power(struct hid_device *hid)
1373 struct usbhid_device *usbhid = hid->driver_data;
1375 usb_autopm_put_interface(usbhid->intf);
1380 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1382 struct hid_device *hid = usb_get_intfdata(intf);
1383 struct usbhid_device *usbhid = hid->driver_data;
1386 if (PMSG_IS_AUTO(message)) {
1387 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1388 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1389 && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1390 && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1391 && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1392 && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1393 && (!usbhid->ledcount || ignoreled))
1395 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1396 spin_unlock_irq(&usbhid->lock);
1397 if (hid->driver && hid->driver->suspend) {
1398 status = hid->driver->suspend(hid, message);
1403 usbhid_mark_busy(usbhid);
1404 spin_unlock_irq(&usbhid->lock);
1409 if (hid->driver && hid->driver->suspend) {
1410 status = hid->driver->suspend(hid, message);
1414 spin_lock_irq(&usbhid->lock);
1415 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1416 spin_unlock_irq(&usbhid->lock);
1417 if (usbhid_wait_io(hid) < 0)
1421 hid_cancel_delayed_stuff(usbhid);
1422 hid_cease_io(usbhid);
1424 if (PMSG_IS_AUTO(message) && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1425 /* lost race against keypresses */
1426 status = hid_start_in(hid);
1429 usbhid_mark_busy(usbhid);
1432 dev_dbg(&intf->dev, "suspend\n");
1436 static int hid_resume(struct usb_interface *intf)
1438 struct hid_device *hid = usb_get_intfdata (intf);
1439 struct usbhid_device *usbhid = hid->driver_data;
1442 if (!test_bit(HID_STARTED, &usbhid->iofl))
1445 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1446 usbhid_mark_busy(usbhid);
1448 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1449 test_bit(HID_RESET_PENDING, &usbhid->iofl))
1450 schedule_work(&usbhid->reset_work);
1451 usbhid->retry_delay = 0;
1452 status = hid_start_in(hid);
1455 usbhid_restart_queues(usbhid);
1457 if (status >= 0 && hid->driver && hid->driver->resume) {
1458 int ret = hid->driver->resume(hid);
1462 dev_dbg(&intf->dev, "resume status %d\n", status);
1466 static int hid_reset_resume(struct usb_interface *intf)
1468 struct hid_device *hid = usb_get_intfdata(intf);
1469 struct usbhid_device *usbhid = hid->driver_data;
1472 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1473 status = hid_post_reset(intf);
1474 if (status >= 0 && hid->driver && hid->driver->reset_resume) {
1475 int ret = hid->driver->reset_resume(hid);
1482 #endif /* CONFIG_PM */
1484 static const struct usb_device_id hid_usb_ids[] = {
1485 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1486 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1487 { } /* Terminating entry */
1490 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1492 static struct usb_driver hid_driver = {
1494 .probe = usbhid_probe,
1495 .disconnect = usbhid_disconnect,
1497 .suspend = hid_suspend,
1498 .resume = hid_resume,
1499 .reset_resume = hid_reset_resume,
1501 .pre_reset = hid_pre_reset,
1502 .post_reset = hid_post_reset,
1503 .id_table = hid_usb_ids,
1504 .supports_autosuspend = 1,
1507 struct usb_interface *usbhid_find_interface(int minor)
1509 return usb_find_interface(&hid_driver, minor);
1512 static int __init hid_init(void)
1514 int retval = -ENOMEM;
1516 retval = usbhid_quirks_init(quirks_param);
1518 goto usbhid_quirks_init_fail;
1519 retval = usb_register(&hid_driver);
1521 goto usb_register_fail;
1522 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1526 usbhid_quirks_exit();
1527 usbhid_quirks_init_fail:
1531 static void __exit hid_exit(void)
1533 usb_deregister(&hid_driver);
1534 usbhid_quirks_exit();
1537 module_init(hid_init);
1538 module_exit(hid_exit);
1540 MODULE_AUTHOR("Andreas Gal");
1541 MODULE_AUTHOR("Vojtech Pavlik");
1542 MODULE_AUTHOR("Jiri Kosina");
1543 MODULE_DESCRIPTION(DRIVER_DESC);
1544 MODULE_LICENSE(DRIVER_LICENSE);