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>
31 #include <linux/string.h>
33 #include <linux/usb.h>
35 #include <linux/hid.h>
36 #include <linux/hiddev.h>
37 #include <linux/hid-debug.h>
38 #include <linux/hidraw.h>
45 #define DRIVER_DESC "USB HID core driver"
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];
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);
84 if ((hid->open > 0 || hid->quirks & HID_QUIRK_ALWAYS_POLL) &&
85 !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
86 !test_bit(HID_SUSPENDED, &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 set_bit(HID_NO_BANDWIDTH, &usbhid->iofl);
94 clear_bit(HID_NO_BANDWIDTH, &usbhid->iofl);
97 spin_unlock_irqrestore(&usbhid->lock, flags);
101 /* I/O retry timer routine */
102 static void hid_retry_timeout(unsigned long _hid)
104 struct hid_device *hid = (struct hid_device *) _hid;
105 struct usbhid_device *usbhid = hid->driver_data;
107 dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
108 if (hid_start_in(hid))
112 /* Workqueue routine to reset the device or clear a halt */
113 static void hid_reset(struct work_struct *work)
115 struct usbhid_device *usbhid =
116 container_of(work, struct usbhid_device, reset_work);
117 struct hid_device *hid = usbhid->hid;
120 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
121 dev_dbg(&usbhid->intf->dev, "clear halt\n");
122 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
123 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
127 dev_dbg(&usbhid->intf->dev,
128 "clear-halt failed: %d\n", rc);
129 set_bit(HID_RESET_PENDING, &usbhid->iofl);
133 if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
134 dev_dbg(&usbhid->intf->dev, "resetting device\n");
135 usb_queue_reset_device(usbhid->intf);
139 /* Main I/O error handler */
140 static void hid_io_error(struct hid_device *hid)
143 struct usbhid_device *usbhid = hid->driver_data;
145 spin_lock_irqsave(&usbhid->lock, flags);
147 /* Stop when disconnected */
148 if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
151 /* If it has been a while since the last error, we'll assume
152 * this a brand new error and reset the retry timeout. */
153 if (time_after(jiffies, usbhid->stop_retry + HZ/2))
154 usbhid->retry_delay = 0;
156 /* When an error occurs, retry at increasing intervals */
157 if (usbhid->retry_delay == 0) {
158 usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */
159 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
160 } else if (usbhid->retry_delay < 100)
161 usbhid->retry_delay *= 2;
163 if (time_after(jiffies, usbhid->stop_retry)) {
165 /* Retries failed, so do a port reset unless we lack bandwidth*/
166 if (!test_bit(HID_NO_BANDWIDTH, &usbhid->iofl)
167 && !test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
169 schedule_work(&usbhid->reset_work);
174 mod_timer(&usbhid->io_retry,
175 jiffies + msecs_to_jiffies(usbhid->retry_delay));
177 spin_unlock_irqrestore(&usbhid->lock, flags);
180 static void usbhid_mark_busy(struct usbhid_device *usbhid)
182 struct usb_interface *intf = usbhid->intf;
184 usb_mark_last_busy(interface_to_usbdev(intf));
187 static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
189 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
193 if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) ||
194 test_bit(HID_SUSPENDED, &usbhid->iofl))
197 if ((kicked = (usbhid->outhead != usbhid->outtail))) {
198 hid_dbg(hid, "Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
200 /* Try to wake up from autosuspend... */
201 r = usb_autopm_get_interface_async(usbhid->intf);
206 * If still suspended, don't submit. Submission will
207 * occur if/when resume drains the queue.
209 if (test_bit(HID_SUSPENDED, &usbhid->iofl)) {
210 usb_autopm_put_interface_no_suspend(usbhid->intf);
214 /* Asynchronously flush queue. */
215 set_bit(HID_OUT_RUNNING, &usbhid->iofl);
216 if (hid_submit_out(hid)) {
217 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
218 usb_autopm_put_interface_async(usbhid->intf);
220 wake_up(&usbhid->wait);
225 static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
227 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
231 WARN_ON(hid == NULL);
232 if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) ||
233 test_bit(HID_SUSPENDED, &usbhid->iofl))
236 if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
237 hid_dbg(hid, "Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
239 /* Try to wake up from autosuspend... */
240 r = usb_autopm_get_interface_async(usbhid->intf);
245 * If still suspended, don't submit. Submission will
246 * occur if/when resume drains the queue.
248 if (test_bit(HID_SUSPENDED, &usbhid->iofl)) {
249 usb_autopm_put_interface_no_suspend(usbhid->intf);
253 /* Asynchronously flush queue. */
254 set_bit(HID_CTRL_RUNNING, &usbhid->iofl);
255 if (hid_submit_ctrl(hid)) {
256 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
257 usb_autopm_put_interface_async(usbhid->intf);
259 wake_up(&usbhid->wait);
265 * Input interrupt completion handler.
268 static void hid_irq_in(struct urb *urb)
270 struct hid_device *hid = urb->context;
271 struct usbhid_device *usbhid = hid->driver_data;
274 switch (urb->status) {
275 case 0: /* success */
276 usbhid->retry_delay = 0;
277 if ((hid->quirks & HID_QUIRK_ALWAYS_POLL) && !hid->open)
279 usbhid_mark_busy(usbhid);
280 if (!test_bit(HID_RESUME_RUNNING, &usbhid->iofl)) {
281 hid_input_report(urb->context, HID_INPUT_REPORT,
282 urb->transfer_buffer,
283 urb->actual_length, 1);
285 * autosuspend refused while keys are pressed
286 * because most keyboards don't wake up when
289 if (hid_check_keys_pressed(hid))
290 set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
292 clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
295 case -EPIPE: /* stall */
296 usbhid_mark_busy(usbhid);
297 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
298 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
299 schedule_work(&usbhid->reset_work);
301 case -ECONNRESET: /* unlink */
303 case -ESHUTDOWN: /* unplug */
304 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
306 case -EILSEQ: /* protocol error or unplug */
307 case -EPROTO: /* protocol error or unplug */
308 case -ETIME: /* protocol error or unplug */
309 case -ETIMEDOUT: /* Should never happen, but... */
310 usbhid_mark_busy(usbhid);
311 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
315 hid_warn(urb->dev, "input irq status %d received\n",
319 status = usb_submit_urb(urb, GFP_ATOMIC);
321 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
322 if (status != -EPERM) {
323 hid_err(hid, "can't resubmit intr, %s-%s/input%d, status %d\n",
324 hid_to_usb_dev(hid)->bus->bus_name,
325 hid_to_usb_dev(hid)->devpath,
326 usbhid->ifnum, status);
332 static int hid_submit_out(struct hid_device *hid)
334 struct hid_report *report;
336 struct usbhid_device *usbhid = hid->driver_data;
339 report = usbhid->out[usbhid->outtail].report;
340 raw_report = usbhid->out[usbhid->outtail].raw_report;
342 usbhid->urbout->transfer_buffer_length = hid_report_len(report);
343 usbhid->urbout->dev = hid_to_usb_dev(hid);
345 memcpy(usbhid->outbuf, raw_report,
346 usbhid->urbout->transfer_buffer_length);
348 usbhid->out[usbhid->outtail].raw_report = NULL;
351 dbg_hid("submitting out urb\n");
353 r = usb_submit_urb(usbhid->urbout, GFP_ATOMIC);
355 hid_err(hid, "usb_submit_urb(out) failed: %d\n", r);
358 usbhid->last_out = jiffies;
362 static int hid_submit_ctrl(struct hid_device *hid)
364 struct hid_report *report;
368 struct usbhid_device *usbhid = hid->driver_data;
370 report = usbhid->ctrl[usbhid->ctrltail].report;
371 raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
372 dir = usbhid->ctrl[usbhid->ctrltail].dir;
374 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
375 if (dir == USB_DIR_OUT) {
376 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
377 usbhid->urbctrl->transfer_buffer_length = len;
379 memcpy(usbhid->ctrlbuf, raw_report, len);
381 usbhid->ctrl[usbhid->ctrltail].raw_report = NULL;
384 int maxpacket, padlen;
386 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
387 maxpacket = usb_maxpacket(hid_to_usb_dev(hid),
388 usbhid->urbctrl->pipe, 0);
390 padlen = DIV_ROUND_UP(len, maxpacket);
392 if (padlen > usbhid->bufsize)
393 padlen = usbhid->bufsize;
396 usbhid->urbctrl->transfer_buffer_length = padlen;
398 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
400 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
401 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT :
403 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) |
405 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
406 usbhid->cr->wLength = cpu_to_le16(len);
408 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
409 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" :
411 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
413 r = usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC);
415 hid_err(hid, "usb_submit_urb(ctrl) failed: %d\n", r);
418 usbhid->last_ctrl = jiffies;
423 * Output interrupt completion handler.
426 static void hid_irq_out(struct urb *urb)
428 struct hid_device *hid = urb->context;
429 struct usbhid_device *usbhid = hid->driver_data;
433 switch (urb->status) {
434 case 0: /* success */
436 case -ESHUTDOWN: /* unplug */
438 case -EILSEQ: /* protocol error or unplug */
439 case -EPROTO: /* protocol error or unplug */
440 case -ECONNRESET: /* unlink */
444 hid_warn(urb->dev, "output irq status %d received\n",
448 spin_lock_irqsave(&usbhid->lock, flags);
451 usbhid->outtail = usbhid->outhead;
453 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
455 if (usbhid->outhead != usbhid->outtail &&
456 hid_submit_out(hid) == 0) {
457 /* Successfully submitted next urb in queue */
458 spin_unlock_irqrestore(&usbhid->lock, flags);
463 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
464 spin_unlock_irqrestore(&usbhid->lock, flags);
465 usb_autopm_put_interface_async(usbhid->intf);
466 wake_up(&usbhid->wait);
470 * Control pipe completion handler.
473 static void hid_ctrl(struct urb *urb)
475 struct hid_device *hid = urb->context;
476 struct usbhid_device *usbhid = hid->driver_data;
477 int unplug = 0, status = urb->status;
480 case 0: /* success */
481 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
482 hid_input_report(urb->context,
483 usbhid->ctrl[usbhid->ctrltail].report->type,
484 urb->transfer_buffer, urb->actual_length, 0);
486 case -ESHUTDOWN: /* unplug */
488 case -EILSEQ: /* protocol error or unplug */
489 case -EPROTO: /* protocol error or unplug */
490 case -ECONNRESET: /* unlink */
492 case -EPIPE: /* report not available */
495 hid_warn(urb->dev, "ctrl urb status %d received\n", status);
498 spin_lock(&usbhid->lock);
501 usbhid->ctrltail = usbhid->ctrlhead;
503 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
505 if (usbhid->ctrlhead != usbhid->ctrltail &&
506 hid_submit_ctrl(hid) == 0) {
507 /* Successfully submitted next urb in queue */
508 spin_unlock(&usbhid->lock);
513 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
514 spin_unlock(&usbhid->lock);
515 usb_autopm_put_interface_async(usbhid->intf);
516 wake_up(&usbhid->wait);
519 static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
523 struct usbhid_device *usbhid = hid->driver_data;
525 if (((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN) ||
526 test_bit(HID_DISCONNECTED, &usbhid->iofl))
529 if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
530 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
531 hid_warn(hid, "output queue full\n");
535 usbhid->out[usbhid->outhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC);
536 if (!usbhid->out[usbhid->outhead].raw_report) {
537 hid_warn(hid, "output queueing failed\n");
540 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
541 usbhid->out[usbhid->outhead].report = report;
542 usbhid->outhead = head;
544 /* If the queue isn't running, restart it */
545 if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl)) {
546 usbhid_restart_out_queue(usbhid);
548 /* Otherwise see if an earlier request has timed out */
549 } else if (time_after(jiffies, usbhid->last_out + HZ * 5)) {
551 /* Prevent autosuspend following the unlink */
552 usb_autopm_get_interface_no_resume(usbhid->intf);
555 * Prevent resubmission in case the URB completes
556 * before we can unlink it. We don't want to cancel
557 * the wrong transfer!
559 usb_block_urb(usbhid->urbout);
561 /* Drop lock to avoid deadlock if the callback runs */
562 spin_unlock(&usbhid->lock);
564 usb_unlink_urb(usbhid->urbout);
565 spin_lock(&usbhid->lock);
566 usb_unblock_urb(usbhid->urbout);
568 /* Unlink might have stopped the queue */
569 if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl))
570 usbhid_restart_out_queue(usbhid);
572 /* Now we can allow autosuspend again */
573 usb_autopm_put_interface_async(usbhid->intf);
578 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
579 hid_warn(hid, "control queue full\n");
583 if (dir == USB_DIR_OUT) {
584 usbhid->ctrl[usbhid->ctrlhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC);
585 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
586 hid_warn(hid, "control queueing failed\n");
589 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
591 usbhid->ctrl[usbhid->ctrlhead].report = report;
592 usbhid->ctrl[usbhid->ctrlhead].dir = dir;
593 usbhid->ctrlhead = head;
595 /* If the queue isn't running, restart it */
596 if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) {
597 usbhid_restart_ctrl_queue(usbhid);
599 /* Otherwise see if an earlier request has timed out */
600 } else if (time_after(jiffies, usbhid->last_ctrl + HZ * 5)) {
602 /* Prevent autosuspend following the unlink */
603 usb_autopm_get_interface_no_resume(usbhid->intf);
606 * Prevent resubmission in case the URB completes
607 * before we can unlink it. We don't want to cancel
608 * the wrong transfer!
610 usb_block_urb(usbhid->urbctrl);
612 /* Drop lock to avoid deadlock if the callback runs */
613 spin_unlock(&usbhid->lock);
615 usb_unlink_urb(usbhid->urbctrl);
616 spin_lock(&usbhid->lock);
617 usb_unblock_urb(usbhid->urbctrl);
619 /* Unlink might have stopped the queue */
620 if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
621 usbhid_restart_ctrl_queue(usbhid);
623 /* Now we can allow autosuspend again */
624 usb_autopm_put_interface_async(usbhid->intf);
628 static void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
630 struct usbhid_device *usbhid = hid->driver_data;
633 spin_lock_irqsave(&usbhid->lock, flags);
634 __usbhid_submit_report(hid, report, dir);
635 spin_unlock_irqrestore(&usbhid->lock, flags);
638 static int usbhid_wait_io(struct hid_device *hid)
640 struct usbhid_device *usbhid = hid->driver_data;
642 if (!wait_event_timeout(usbhid->wait,
643 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
644 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
646 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
653 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
655 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
656 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
657 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
660 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
661 unsigned char type, void *buf, int size)
663 int result, retries = 4;
665 memset(buf, 0, size);
668 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
669 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
670 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
672 } while (result < size && retries);
676 int usbhid_open(struct hid_device *hid)
678 struct usbhid_device *usbhid = hid->driver_data;
681 mutex_lock(&hid_open_mut);
683 res = usb_autopm_get_interface(usbhid->intf);
684 /* the device must be awake to reliably request remote wakeup */
690 usbhid->intf->needs_remote_wakeup = 1;
691 set_bit(HID_RESUME_RUNNING, &usbhid->iofl);
692 res = hid_start_in(hid);
694 if (res != -ENOSPC) {
698 /* no use opening if resources are insufficient */
701 usbhid->intf->needs_remote_wakeup = 0;
704 usb_autopm_put_interface(usbhid->intf);
707 * In case events are generated while nobody was listening,
708 * some are released when the device is re-opened.
709 * Wait 50 msec for the queue to empty before allowing events
712 if (res == 0 && !(hid->quirks & HID_QUIRK_ALWAYS_POLL))
714 clear_bit(HID_RESUME_RUNNING, &usbhid->iofl);
717 mutex_unlock(&hid_open_mut);
721 void usbhid_close(struct hid_device *hid)
723 struct usbhid_device *usbhid = hid->driver_data;
725 mutex_lock(&hid_open_mut);
727 /* protecting hid->open to make sure we don't restart
728 * data acquistion due to a resumption we no longer
731 spin_lock_irq(&usbhid->lock);
733 spin_unlock_irq(&usbhid->lock);
734 hid_cancel_delayed_stuff(usbhid);
735 if (!(hid->quirks & HID_QUIRK_ALWAYS_POLL)) {
736 usb_kill_urb(usbhid->urbin);
737 usbhid->intf->needs_remote_wakeup = 0;
740 spin_unlock_irq(&usbhid->lock);
742 mutex_unlock(&hid_open_mut);
746 * Initialize all reports
749 void usbhid_init_reports(struct hid_device *hid)
751 struct hid_report *report;
752 struct usbhid_device *usbhid = hid->driver_data;
753 struct hid_report_enum *report_enum;
756 if (!(hid->quirks & HID_QUIRK_NO_INIT_INPUT_REPORTS)) {
757 report_enum = &hid->report_enum[HID_INPUT_REPORT];
758 list_for_each_entry(report, &report_enum->report_list, list)
759 usbhid_submit_report(hid, report, USB_DIR_IN);
762 report_enum = &hid->report_enum[HID_FEATURE_REPORT];
763 list_for_each_entry(report, &report_enum->report_list, list)
764 usbhid_submit_report(hid, report, USB_DIR_IN);
767 ret = usbhid_wait_io(hid);
770 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
771 usb_kill_urb(usbhid->urbctrl);
772 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
773 usb_kill_urb(usbhid->urbout);
774 ret = usbhid_wait_io(hid);
778 hid_warn(hid, "timeout initializing reports\n");
782 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
784 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
785 unsigned int hid_code, struct hid_field **pfield)
787 struct hid_report *report;
788 struct hid_field *field;
789 struct hid_usage *usage;
792 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
793 for (i = 0; i < report->maxfield; i++) {
794 field = report->field[i];
795 for (j = 0; j < field->maxusage; j++) {
796 usage = &field->usage[j];
797 if ((usage->hid & HID_USAGE_PAGE) == page &&
798 (usage->hid & 0xFFFF) == hid_code) {
808 static void usbhid_set_leds(struct hid_device *hid)
810 struct hid_field *field;
813 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
814 hid_set_field(field, offset, 0);
815 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
820 * Traverse the supplied list of reports and find the longest
822 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
825 struct hid_report *report;
828 list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
829 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
835 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
837 struct usbhid_device *usbhid = hid->driver_data;
839 usbhid->inbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
841 usbhid->outbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
842 &usbhid->outbuf_dma);
843 usbhid->cr = kmalloc(sizeof(*usbhid->cr), GFP_KERNEL);
844 usbhid->ctrlbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
845 &usbhid->ctrlbuf_dma);
846 if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
853 static int usbhid_get_raw_report(struct hid_device *hid,
854 unsigned char report_number, __u8 *buf, size_t count,
855 unsigned char report_type)
857 struct usbhid_device *usbhid = hid->driver_data;
858 struct usb_device *dev = hid_to_usb_dev(hid);
859 struct usb_interface *intf = usbhid->intf;
860 struct usb_host_interface *interface = intf->cur_altsetting;
861 int skipped_report_id = 0;
864 /* Byte 0 is the report number. Report data starts at byte 1.*/
865 buf[0] = report_number;
866 if (report_number == 0x0) {
867 /* Offset the return buffer by 1, so that the report ID
868 will remain in byte 0. */
871 skipped_report_id = 1;
873 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
875 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
876 ((report_type + 1) << 8) | report_number,
877 interface->desc.bInterfaceNumber, buf, count,
878 USB_CTRL_SET_TIMEOUT);
880 /* count also the report id */
881 if (ret > 0 && skipped_report_id)
887 static int usbhid_set_raw_report(struct hid_device *hid, unsigned int reportnum,
888 __u8 *buf, size_t count, unsigned char rtype)
890 struct usbhid_device *usbhid = hid->driver_data;
891 struct usb_device *dev = hid_to_usb_dev(hid);
892 struct usb_interface *intf = usbhid->intf;
893 struct usb_host_interface *interface = intf->cur_altsetting;
894 int ret, skipped_report_id = 0;
896 /* Byte 0 is the report number. Report data starts at byte 1.*/
897 if ((rtype == HID_OUTPUT_REPORT) &&
898 (hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORT_ID))
904 /* Don't send the Report ID */
907 skipped_report_id = 1;
910 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
912 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
913 ((rtype + 1) << 8) | reportnum,
914 interface->desc.bInterfaceNumber, buf, count,
915 USB_CTRL_SET_TIMEOUT);
916 /* count also the report id, if this was a numbered report. */
917 if (ret > 0 && skipped_report_id)
923 static int usbhid_output_report(struct hid_device *hid, __u8 *buf, size_t count)
925 struct usbhid_device *usbhid = hid->driver_data;
926 struct usb_device *dev = hid_to_usb_dev(hid);
927 int actual_length, skipped_report_id = 0, ret;
933 /* Don't send the Report ID */
936 skipped_report_id = 1;
939 ret = usb_interrupt_msg(dev, usbhid->urbout->pipe,
940 buf, count, &actual_length,
941 USB_CTRL_SET_TIMEOUT);
942 /* return the number of bytes transferred */
945 /* count also the report id */
946 if (skipped_report_id)
953 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
955 struct usbhid_device *usbhid = hid->driver_data;
957 usb_free_coherent(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
958 usb_free_coherent(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
960 usb_free_coherent(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
963 static int usbhid_parse(struct hid_device *hid)
965 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
966 struct usb_host_interface *interface = intf->cur_altsetting;
967 struct usb_device *dev = interface_to_usbdev (intf);
968 struct hid_descriptor *hdesc;
970 unsigned int rsize = 0;
974 quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
975 le16_to_cpu(dev->descriptor.idProduct));
977 if (quirks & HID_QUIRK_IGNORE)
980 /* Many keyboards and mice don't like to be polled for reports,
981 * so we will always set the HID_QUIRK_NOGET flag for them. */
982 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
983 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
984 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
985 quirks |= HID_QUIRK_NOGET;
988 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
989 (!interface->desc.bNumEndpoints ||
990 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
991 dbg_hid("class descriptor not present\n");
995 hid->version = le16_to_cpu(hdesc->bcdHID);
996 hid->country = hdesc->bCountryCode;
998 for (n = 0; n < hdesc->bNumDescriptors; n++)
999 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
1000 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
1002 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
1003 dbg_hid("weird size of report descriptor (%u)\n", rsize);
1007 if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
1008 dbg_hid("couldn't allocate rdesc memory\n");
1012 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
1014 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
1015 HID_DT_REPORT, rdesc, rsize);
1017 dbg_hid("reading report descriptor failed\n");
1022 ret = hid_parse_report(hid, rdesc, rsize);
1025 dbg_hid("parsing report descriptor failed\n");
1029 hid->quirks |= quirks;
1036 static int usbhid_start(struct hid_device *hid)
1038 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
1039 struct usb_host_interface *interface = intf->cur_altsetting;
1040 struct usb_device *dev = interface_to_usbdev(intf);
1041 struct usbhid_device *usbhid = hid->driver_data;
1042 unsigned int n, insize = 0;
1045 clear_bit(HID_DISCONNECTED, &usbhid->iofl);
1047 usbhid->bufsize = HID_MIN_BUFFER_SIZE;
1048 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
1049 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
1050 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
1052 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
1053 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
1055 hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
1057 if (insize > HID_MAX_BUFFER_SIZE)
1058 insize = HID_MAX_BUFFER_SIZE;
1060 if (hid_alloc_buffers(dev, hid)) {
1065 for (n = 0; n < interface->desc.bNumEndpoints; n++) {
1066 struct usb_endpoint_descriptor *endpoint;
1070 endpoint = &interface->endpoint[n].desc;
1071 if (!usb_endpoint_xfer_int(endpoint))
1074 interval = endpoint->bInterval;
1076 /* Some vendors give fullspeed interval on highspeed devides */
1077 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
1078 dev->speed == USB_SPEED_HIGH) {
1079 interval = fls(endpoint->bInterval*8);
1080 printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
1081 hid->name, endpoint->bInterval, interval);
1084 /* Change the polling interval of mice. */
1085 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
1086 interval = hid_mousepoll_interval;
1089 if (usb_endpoint_dir_in(endpoint)) {
1092 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
1094 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
1095 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
1096 hid_irq_in, hid, interval);
1097 usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
1098 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1102 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
1104 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
1105 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
1106 hid_irq_out, hid, interval);
1107 usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
1108 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1112 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
1113 if (!usbhid->urbctrl) {
1118 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
1119 usbhid->ctrlbuf, 1, hid_ctrl, hid);
1120 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
1121 usbhid->urbctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1123 if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS))
1124 usbhid_init_reports(hid);
1126 set_bit(HID_STARTED, &usbhid->iofl);
1128 if (hid->quirks & HID_QUIRK_ALWAYS_POLL) {
1129 ret = usb_autopm_get_interface(usbhid->intf);
1132 usbhid->intf->needs_remote_wakeup = 1;
1133 ret = hid_start_in(hid);
1136 "failed to start in urb: %d\n", ret);
1138 usb_autopm_put_interface(usbhid->intf);
1141 /* Some keyboards don't work until their LEDs have been set.
1142 * Since BIOSes do set the LEDs, it must be safe for any device
1143 * that supports the keyboard boot protocol.
1144 * In addition, enable remote wakeup by default for all keyboard
1145 * devices supporting the boot protocol.
1147 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1148 interface->desc.bInterfaceProtocol ==
1149 USB_INTERFACE_PROTOCOL_KEYBOARD) {
1150 usbhid_set_leds(hid);
1151 device_set_wakeup_enable(&dev->dev, 1);
1156 usb_free_urb(usbhid->urbin);
1157 usb_free_urb(usbhid->urbout);
1158 usb_free_urb(usbhid->urbctrl);
1159 usbhid->urbin = NULL;
1160 usbhid->urbout = NULL;
1161 usbhid->urbctrl = NULL;
1162 hid_free_buffers(dev, hid);
1166 static void usbhid_stop(struct hid_device *hid)
1168 struct usbhid_device *usbhid = hid->driver_data;
1170 if (WARN_ON(!usbhid))
1173 if (hid->quirks & HID_QUIRK_ALWAYS_POLL)
1174 usbhid->intf->needs_remote_wakeup = 0;
1176 clear_bit(HID_STARTED, &usbhid->iofl);
1177 spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */
1178 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1179 spin_unlock_irq(&usbhid->lock);
1180 usb_kill_urb(usbhid->urbin);
1181 usb_kill_urb(usbhid->urbout);
1182 usb_kill_urb(usbhid->urbctrl);
1184 hid_cancel_delayed_stuff(usbhid);
1188 usb_free_urb(usbhid->urbin);
1189 usb_free_urb(usbhid->urbctrl);
1190 usb_free_urb(usbhid->urbout);
1191 usbhid->urbin = NULL; /* don't mess up next start */
1192 usbhid->urbctrl = NULL;
1193 usbhid->urbout = NULL;
1195 hid_free_buffers(hid_to_usb_dev(hid), hid);
1198 static int usbhid_power(struct hid_device *hid, int lvl)
1203 case PM_HINT_FULLON:
1204 r = usbhid_get_power(hid);
1206 case PM_HINT_NORMAL:
1207 usbhid_put_power(hid);
1213 static void usbhid_request(struct hid_device *hid, struct hid_report *rep, int reqtype)
1216 case HID_REQ_GET_REPORT:
1217 usbhid_submit_report(hid, rep, USB_DIR_IN);
1219 case HID_REQ_SET_REPORT:
1220 usbhid_submit_report(hid, rep, USB_DIR_OUT);
1225 static int usbhid_raw_request(struct hid_device *hid, unsigned char reportnum,
1226 __u8 *buf, size_t len, unsigned char rtype,
1230 case HID_REQ_GET_REPORT:
1231 return usbhid_get_raw_report(hid, reportnum, buf, len, rtype);
1232 case HID_REQ_SET_REPORT:
1233 return usbhid_set_raw_report(hid, reportnum, buf, len, rtype);
1239 static int usbhid_idle(struct hid_device *hid, int report, int idle,
1242 struct usb_device *dev = hid_to_usb_dev(hid);
1243 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
1244 struct usb_host_interface *interface = intf->cur_altsetting;
1245 int ifnum = interface->desc.bInterfaceNumber;
1247 if (reqtype != HID_REQ_SET_IDLE)
1250 return hid_set_idle(dev, ifnum, report, idle);
1253 static struct hid_ll_driver usb_hid_driver = {
1254 .parse = usbhid_parse,
1255 .start = usbhid_start,
1256 .stop = usbhid_stop,
1257 .open = usbhid_open,
1258 .close = usbhid_close,
1259 .power = usbhid_power,
1260 .request = usbhid_request,
1261 .wait = usbhid_wait_io,
1262 .raw_request = usbhid_raw_request,
1263 .output_report = usbhid_output_report,
1264 .idle = usbhid_idle,
1267 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1269 struct usb_host_interface *interface = intf->cur_altsetting;
1270 struct usb_device *dev = interface_to_usbdev(intf);
1271 struct usbhid_device *usbhid;
1272 struct hid_device *hid;
1273 unsigned int n, has_in = 0;
1277 dbg_hid("HID probe called for ifnum %d\n",
1278 intf->altsetting->desc.bInterfaceNumber);
1280 for (n = 0; n < interface->desc.bNumEndpoints; n++)
1281 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1284 hid_err(intf, "couldn't find an input interrupt endpoint\n");
1288 hid = hid_allocate_device();
1290 return PTR_ERR(hid);
1292 usb_set_intfdata(intf, hid);
1293 hid->ll_driver = &usb_hid_driver;
1294 hid->ff_init = hid_pidff_init;
1295 #ifdef CONFIG_USB_HIDDEV
1296 hid->hiddev_connect = hiddev_connect;
1297 hid->hiddev_disconnect = hiddev_disconnect;
1298 hid->hiddev_hid_event = hiddev_hid_event;
1299 hid->hiddev_report_event = hiddev_report_event;
1301 hid->dev.parent = &intf->dev;
1303 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1304 hid->product = le16_to_cpu(dev->descriptor.idProduct);
1306 hid->quirks = usbhid_lookup_quirk(hid->vendor, hid->product);
1307 if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1308 USB_INTERFACE_PROTOCOL_MOUSE)
1309 hid->type = HID_TYPE_USBMOUSE;
1310 else if (intf->cur_altsetting->desc.bInterfaceProtocol == 0)
1311 hid->type = HID_TYPE_USBNONE;
1313 if (dev->manufacturer)
1314 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1317 if (dev->manufacturer)
1318 strlcat(hid->name, " ", sizeof(hid->name));
1319 strlcat(hid->name, dev->product, sizeof(hid->name));
1322 if (!strlen(hid->name))
1323 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1324 le16_to_cpu(dev->descriptor.idVendor),
1325 le16_to_cpu(dev->descriptor.idProduct));
1327 usb_make_path(dev, hid->phys, sizeof(hid->phys));
1328 strlcat(hid->phys, "/input", sizeof(hid->phys));
1329 len = strlen(hid->phys);
1330 if (len < sizeof(hid->phys) - 1)
1331 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1332 "%d", intf->altsetting[0].desc.bInterfaceNumber);
1334 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1337 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1338 if (usbhid == NULL) {
1343 hid->driver_data = usbhid;
1345 usbhid->intf = intf;
1346 usbhid->ifnum = interface->desc.bInterfaceNumber;
1348 init_waitqueue_head(&usbhid->wait);
1349 INIT_WORK(&usbhid->reset_work, hid_reset);
1350 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
1351 spin_lock_init(&usbhid->lock);
1353 ret = hid_add_device(hid);
1356 hid_err(intf, "can't add hid device: %d\n", ret);
1364 hid_destroy_device(hid);
1368 static void usbhid_disconnect(struct usb_interface *intf)
1370 struct hid_device *hid = usb_get_intfdata(intf);
1371 struct usbhid_device *usbhid;
1376 usbhid = hid->driver_data;
1377 spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */
1378 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1379 spin_unlock_irq(&usbhid->lock);
1380 hid_destroy_device(hid);
1384 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1386 del_timer_sync(&usbhid->io_retry);
1387 cancel_work_sync(&usbhid->reset_work);
1390 static void hid_cease_io(struct usbhid_device *usbhid)
1392 del_timer_sync(&usbhid->io_retry);
1393 usb_kill_urb(usbhid->urbin);
1394 usb_kill_urb(usbhid->urbctrl);
1395 usb_kill_urb(usbhid->urbout);
1398 static void hid_restart_io(struct hid_device *hid)
1400 struct usbhid_device *usbhid = hid->driver_data;
1401 int clear_halt = test_bit(HID_CLEAR_HALT, &usbhid->iofl);
1402 int reset_pending = test_bit(HID_RESET_PENDING, &usbhid->iofl);
1404 spin_lock_irq(&usbhid->lock);
1405 clear_bit(HID_SUSPENDED, &usbhid->iofl);
1406 usbhid_mark_busy(usbhid);
1408 if (clear_halt || reset_pending)
1409 schedule_work(&usbhid->reset_work);
1410 usbhid->retry_delay = 0;
1411 spin_unlock_irq(&usbhid->lock);
1413 if (reset_pending || !test_bit(HID_STARTED, &usbhid->iofl))
1417 if (hid_start_in(hid) < 0)
1421 spin_lock_irq(&usbhid->lock);
1422 if (usbhid->urbout && !test_bit(HID_OUT_RUNNING, &usbhid->iofl))
1423 usbhid_restart_out_queue(usbhid);
1424 if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
1425 usbhid_restart_ctrl_queue(usbhid);
1426 spin_unlock_irq(&usbhid->lock);
1429 /* Treat USB reset pretty much the same as suspend/resume */
1430 static int hid_pre_reset(struct usb_interface *intf)
1432 struct hid_device *hid = usb_get_intfdata(intf);
1433 struct usbhid_device *usbhid = hid->driver_data;
1435 spin_lock_irq(&usbhid->lock);
1436 set_bit(HID_RESET_PENDING, &usbhid->iofl);
1437 spin_unlock_irq(&usbhid->lock);
1438 hid_cease_io(usbhid);
1443 /* Same routine used for post_reset and reset_resume */
1444 static int hid_post_reset(struct usb_interface *intf)
1446 struct usb_device *dev = interface_to_usbdev (intf);
1447 struct hid_device *hid = usb_get_intfdata(intf);
1448 struct usbhid_device *usbhid = hid->driver_data;
1449 struct usb_host_interface *interface = intf->cur_altsetting;
1453 /* Fetch and examine the HID report descriptor. If this
1454 * has changed, then rebind. Since usbcore's check of the
1455 * configuration descriptors passed, we already know that
1456 * the size of the HID report descriptor has not changed.
1458 rdesc = kmalloc(hid->dev_rsize, GFP_KERNEL);
1460 dbg_hid("couldn't allocate rdesc memory (post_reset)\n");
1463 status = hid_get_class_descriptor(dev,
1464 interface->desc.bInterfaceNumber,
1465 HID_DT_REPORT, rdesc, hid->dev_rsize);
1467 dbg_hid("reading report descriptor failed (post_reset)\n");
1471 status = memcmp(rdesc, hid->dev_rdesc, hid->dev_rsize);
1474 dbg_hid("report descriptor changed\n");
1478 /* No need to do another reset or clear a halted endpoint */
1479 spin_lock_irq(&usbhid->lock);
1480 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1481 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
1482 spin_unlock_irq(&usbhid->lock);
1483 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1485 hid_restart_io(hid);
1490 int usbhid_get_power(struct hid_device *hid)
1492 struct usbhid_device *usbhid = hid->driver_data;
1494 return usb_autopm_get_interface(usbhid->intf);
1497 void usbhid_put_power(struct hid_device *hid)
1499 struct usbhid_device *usbhid = hid->driver_data;
1501 usb_autopm_put_interface(usbhid->intf);
1506 static int hid_resume_common(struct hid_device *hid, bool driver_suspended)
1510 hid_restart_io(hid);
1511 if (driver_suspended && hid->driver && hid->driver->resume)
1512 status = hid->driver->resume(hid);
1516 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1518 struct hid_device *hid = usb_get_intfdata(intf);
1519 struct usbhid_device *usbhid = hid->driver_data;
1521 bool driver_suspended = false;
1522 unsigned int ledcount;
1524 if (PMSG_IS_AUTO(message)) {
1525 ledcount = hidinput_count_leds(hid);
1526 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1527 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1528 && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1529 && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1530 && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1531 && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1532 && (!ledcount || ignoreled))
1534 set_bit(HID_SUSPENDED, &usbhid->iofl);
1535 spin_unlock_irq(&usbhid->lock);
1536 if (hid->driver && hid->driver->suspend) {
1537 status = hid->driver->suspend(hid, message);
1541 driver_suspended = true;
1543 usbhid_mark_busy(usbhid);
1544 spin_unlock_irq(&usbhid->lock);
1549 /* TODO: resume() might need to handle suspend failure */
1550 if (hid->driver && hid->driver->suspend)
1551 status = hid->driver->suspend(hid, message);
1552 driver_suspended = true;
1553 spin_lock_irq(&usbhid->lock);
1554 set_bit(HID_SUSPENDED, &usbhid->iofl);
1555 spin_unlock_irq(&usbhid->lock);
1556 if (usbhid_wait_io(hid) < 0)
1560 hid_cancel_delayed_stuff(usbhid);
1561 hid_cease_io(usbhid);
1563 if (PMSG_IS_AUTO(message) && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1564 /* lost race against keypresses */
1568 dev_dbg(&intf->dev, "suspend\n");
1572 hid_resume_common(hid, driver_suspended);
1576 static int hid_resume(struct usb_interface *intf)
1578 struct hid_device *hid = usb_get_intfdata (intf);
1581 status = hid_resume_common(hid, true);
1582 dev_dbg(&intf->dev, "resume status %d\n", status);
1586 static int hid_reset_resume(struct usb_interface *intf)
1588 struct hid_device *hid = usb_get_intfdata(intf);
1591 status = hid_post_reset(intf);
1592 if (status >= 0 && hid->driver && hid->driver->reset_resume) {
1593 int ret = hid->driver->reset_resume(hid);
1600 #endif /* CONFIG_PM */
1602 static const struct usb_device_id hid_usb_ids[] = {
1603 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1604 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1605 { } /* Terminating entry */
1608 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1610 static struct usb_driver hid_driver = {
1612 .probe = usbhid_probe,
1613 .disconnect = usbhid_disconnect,
1615 .suspend = hid_suspend,
1616 .resume = hid_resume,
1617 .reset_resume = hid_reset_resume,
1619 .pre_reset = hid_pre_reset,
1620 .post_reset = hid_post_reset,
1621 .id_table = hid_usb_ids,
1622 .supports_autosuspend = 1,
1625 struct usb_interface *usbhid_find_interface(int minor)
1627 return usb_find_interface(&hid_driver, minor);
1630 static int __init hid_init(void)
1632 int retval = -ENOMEM;
1634 retval = usbhid_quirks_init(quirks_param);
1636 goto usbhid_quirks_init_fail;
1637 retval = usb_register(&hid_driver);
1639 goto usb_register_fail;
1640 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1644 usbhid_quirks_exit();
1645 usbhid_quirks_init_fail:
1649 static void __exit hid_exit(void)
1651 usb_deregister(&hid_driver);
1652 usbhid_quirks_exit();
1655 module_init(hid_init);
1656 module_exit(hid_exit);
1658 MODULE_AUTHOR("Andreas Gal");
1659 MODULE_AUTHOR("Vojtech Pavlik");
1660 MODULE_AUTHOR("Jiri Kosina");
1661 MODULE_DESCRIPTION(DRIVER_DESC);
1662 MODULE_LICENSE("GPL");