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
);
70 static struct workqueue_struct
*resumption_waker
;
72 static void hid_io_error(struct hid_device
*hid
);
73 static int hid_submit_out(struct hid_device
*hid
);
74 static int hid_submit_ctrl(struct hid_device
*hid
);
75 static void hid_cancel_delayed_stuff(struct usbhid_device
*usbhid
);
77 /* Start up the input URB */
78 static int hid_start_in(struct hid_device
*hid
)
82 struct usbhid_device
*usbhid
= hid
->driver_data
;
84 spin_lock_irqsave(&usbhid
->lock
, flags
);
86 !test_bit(HID_DISCONNECTED
, &usbhid
->iofl
) &&
87 !test_bit(HID_REPORTED_IDLE
, &usbhid
->iofl
) &&
88 !test_and_set_bit(HID_IN_RUNNING
, &usbhid
->iofl
)) {
89 rc
= usb_submit_urb(usbhid
->urbin
, GFP_ATOMIC
);
91 clear_bit(HID_IN_RUNNING
, &usbhid
->iofl
);
93 spin_unlock_irqrestore(&usbhid
->lock
, flags
);
97 /* I/O retry timer routine */
98 static void hid_retry_timeout(unsigned long _hid
)
100 struct hid_device
*hid
= (struct hid_device
*) _hid
;
101 struct usbhid_device
*usbhid
= hid
->driver_data
;
103 dev_dbg(&usbhid
->intf
->dev
, "retrying intr urb\n");
104 if (hid_start_in(hid
))
108 /* Workqueue routine to reset the device or clear a halt */
109 static void hid_reset(struct work_struct
*work
)
111 struct usbhid_device
*usbhid
=
112 container_of(work
, struct usbhid_device
, reset_work
);
113 struct hid_device
*hid
= usbhid
->hid
;
116 if (test_bit(HID_CLEAR_HALT
, &usbhid
->iofl
)) {
117 dev_dbg(&usbhid
->intf
->dev
, "clear halt\n");
118 rc
= usb_clear_halt(hid_to_usb_dev(hid
), usbhid
->urbin
->pipe
);
119 clear_bit(HID_CLEAR_HALT
, &usbhid
->iofl
);
123 else if (test_bit(HID_RESET_PENDING
, &usbhid
->iofl
)) {
124 dev_dbg(&usbhid
->intf
->dev
, "resetting device\n");
125 rc
= usb_lock_device_for_reset(hid_to_usb_dev(hid
), usbhid
->intf
);
127 rc
= usb_reset_device(hid_to_usb_dev(hid
));
128 usb_unlock_device(hid_to_usb_dev(hid
));
130 clear_bit(HID_RESET_PENDING
, &usbhid
->iofl
);
135 if (!test_bit(HID_IN_RUNNING
, &usbhid
->iofl
))
139 hid_err(hid
, "can't reset device, %s-%s/input%d, status %d\n",
140 hid_to_usb_dev(hid
)->bus
->bus_name
,
141 hid_to_usb_dev(hid
)->devpath
,
151 /* Main I/O error handler */
152 static void hid_io_error(struct hid_device
*hid
)
155 struct usbhid_device
*usbhid
= hid
->driver_data
;
157 spin_lock_irqsave(&usbhid
->lock
, flags
);
159 /* Stop when disconnected */
160 if (test_bit(HID_DISCONNECTED
, &usbhid
->iofl
))
163 /* If it has been a while since the last error, we'll assume
164 * this a brand new error and reset the retry timeout. */
165 if (time_after(jiffies
, usbhid
->stop_retry
+ HZ
/2))
166 usbhid
->retry_delay
= 0;
168 /* When an error occurs, retry at increasing intervals */
169 if (usbhid
->retry_delay
== 0) {
170 usbhid
->retry_delay
= 13; /* Then 26, 52, 104, 104, ... */
171 usbhid
->stop_retry
= jiffies
+ msecs_to_jiffies(1000);
172 } else if (usbhid
->retry_delay
< 100)
173 usbhid
->retry_delay
*= 2;
175 if (time_after(jiffies
, usbhid
->stop_retry
)) {
177 /* Retries failed, so do a port reset */
178 if (!test_and_set_bit(HID_RESET_PENDING
, &usbhid
->iofl
)) {
179 schedule_work(&usbhid
->reset_work
);
184 mod_timer(&usbhid
->io_retry
,
185 jiffies
+ msecs_to_jiffies(usbhid
->retry_delay
));
187 spin_unlock_irqrestore(&usbhid
->lock
, flags
);
190 static void usbhid_mark_busy(struct usbhid_device
*usbhid
)
192 struct usb_interface
*intf
= usbhid
->intf
;
194 usb_mark_last_busy(interface_to_usbdev(intf
));
197 static int usbhid_restart_out_queue(struct usbhid_device
*usbhid
)
199 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
);
207 if (hid_submit_out(hid
)) {
208 clear_bit(HID_OUT_RUNNING
, &usbhid
->iofl
);
209 wake_up(&usbhid
->wait
);
215 static int usbhid_restart_ctrl_queue(struct usbhid_device
*usbhid
)
217 struct hid_device
*hid
= usb_get_intfdata(usbhid
->intf
);
220 WARN_ON(hid
== NULL
);
224 if ((kicked
= (usbhid
->ctrlhead
!= usbhid
->ctrltail
))) {
225 dbg("Kicking head %d tail %d", usbhid
->ctrlhead
, usbhid
->ctrltail
);
226 if (hid_submit_ctrl(hid
)) {
227 clear_bit(HID_CTRL_RUNNING
, &usbhid
->iofl
);
228 wake_up(&usbhid
->wait
);
235 * Input interrupt completion handler.
238 static void hid_irq_in(struct urb
*urb
)
240 struct hid_device
*hid
= urb
->context
;
241 struct usbhid_device
*usbhid
= hid
->driver_data
;
244 switch (urb
->status
) {
245 case 0: /* success */
246 usbhid_mark_busy(usbhid
);
247 usbhid
->retry_delay
= 0;
248 hid_input_report(urb
->context
, HID_INPUT_REPORT
,
249 urb
->transfer_buffer
,
250 urb
->actual_length
, 1);
252 * autosuspend refused while keys are pressed
253 * because most keyboards don't wake up when
256 if (hid_check_keys_pressed(hid
))
257 set_bit(HID_KEYS_PRESSED
, &usbhid
->iofl
);
259 clear_bit(HID_KEYS_PRESSED
, &usbhid
->iofl
);
261 case -EPIPE
: /* stall */
262 usbhid_mark_busy(usbhid
);
263 clear_bit(HID_IN_RUNNING
, &usbhid
->iofl
);
264 set_bit(HID_CLEAR_HALT
, &usbhid
->iofl
);
265 schedule_work(&usbhid
->reset_work
);
267 case -ECONNRESET
: /* unlink */
269 case -ESHUTDOWN
: /* unplug */
270 clear_bit(HID_IN_RUNNING
, &usbhid
->iofl
);
272 case -EILSEQ
: /* protocol error or unplug */
273 case -EPROTO
: /* protocol error or unplug */
274 case -ETIME
: /* protocol error or unplug */
275 case -ETIMEDOUT
: /* Should never happen, but... */
276 usbhid_mark_busy(usbhid
);
277 clear_bit(HID_IN_RUNNING
, &usbhid
->iofl
);
281 hid_warn(urb
->dev
, "input irq status %d received\n",
285 status
= usb_submit_urb(urb
, GFP_ATOMIC
);
287 clear_bit(HID_IN_RUNNING
, &usbhid
->iofl
);
288 if (status
!= -EPERM
) {
289 hid_err(hid
, "can't resubmit intr, %s-%s/input%d, status %d\n",
290 hid_to_usb_dev(hid
)->bus
->bus_name
,
291 hid_to_usb_dev(hid
)->devpath
,
292 usbhid
->ifnum
, status
);
298 static int hid_submit_out(struct hid_device
*hid
)
300 struct hid_report
*report
;
302 struct usbhid_device
*usbhid
= hid
->driver_data
;
304 report
= usbhid
->out
[usbhid
->outtail
].report
;
305 raw_report
= usbhid
->out
[usbhid
->outtail
].raw_report
;
307 if (!test_bit(HID_REPORTED_IDLE
, &usbhid
->iofl
)) {
308 usbhid
->urbout
->transfer_buffer_length
= ((report
->size
- 1) >> 3) + 1 + (report
->id
> 0);
309 usbhid
->urbout
->dev
= hid_to_usb_dev(hid
);
310 memcpy(usbhid
->outbuf
, raw_report
, usbhid
->urbout
->transfer_buffer_length
);
313 dbg_hid("submitting out urb\n");
315 if (usb_submit_urb(usbhid
->urbout
, GFP_ATOMIC
)) {
316 hid_err(hid
, "usb_submit_urb(out) failed\n");
319 usbhid
->last_out
= jiffies
;
322 * queue work to wake up the device.
323 * as the work queue is freezeable, this is safe
324 * with respect to STD and STR
326 queue_work(resumption_waker
, &usbhid
->restart_work
);
332 static int hid_submit_ctrl(struct hid_device
*hid
)
334 struct hid_report
*report
;
338 struct usbhid_device
*usbhid
= hid
->driver_data
;
340 report
= usbhid
->ctrl
[usbhid
->ctrltail
].report
;
341 raw_report
= usbhid
->ctrl
[usbhid
->ctrltail
].raw_report
;
342 dir
= usbhid
->ctrl
[usbhid
->ctrltail
].dir
;
344 if (!test_bit(HID_REPORTED_IDLE
, &usbhid
->iofl
)) {
345 len
= ((report
->size
- 1) >> 3) + 1 + (report
->id
> 0);
346 if (dir
== USB_DIR_OUT
) {
347 usbhid
->urbctrl
->pipe
= usb_sndctrlpipe(hid_to_usb_dev(hid
), 0);
348 usbhid
->urbctrl
->transfer_buffer_length
= len
;
349 memcpy(usbhid
->ctrlbuf
, raw_report
, len
);
352 int maxpacket
, padlen
;
354 usbhid
->urbctrl
->pipe
= usb_rcvctrlpipe(hid_to_usb_dev(hid
), 0);
355 maxpacket
= usb_maxpacket(hid_to_usb_dev(hid
), usbhid
->urbctrl
->pipe
, 0);
357 padlen
= DIV_ROUND_UP(len
, maxpacket
);
359 if (padlen
> usbhid
->bufsize
)
360 padlen
= usbhid
->bufsize
;
363 usbhid
->urbctrl
->transfer_buffer_length
= padlen
;
365 usbhid
->urbctrl
->dev
= hid_to_usb_dev(hid
);
367 usbhid
->cr
->bRequestType
= USB_TYPE_CLASS
| USB_RECIP_INTERFACE
| dir
;
368 usbhid
->cr
->bRequest
= (dir
== USB_DIR_OUT
) ? HID_REQ_SET_REPORT
: HID_REQ_GET_REPORT
;
369 usbhid
->cr
->wValue
= cpu_to_le16(((report
->type
+ 1) << 8) | report
->id
);
370 usbhid
->cr
->wIndex
= cpu_to_le16(usbhid
->ifnum
);
371 usbhid
->cr
->wLength
= cpu_to_le16(len
);
373 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
374 usbhid
->cr
->bRequest
== HID_REQ_SET_REPORT
? "Set_Report" : "Get_Report",
375 usbhid
->cr
->wValue
, usbhid
->cr
->wIndex
, usbhid
->cr
->wLength
);
377 if (usb_submit_urb(usbhid
->urbctrl
, GFP_ATOMIC
)) {
378 hid_err(hid
, "usb_submit_urb(ctrl) failed\n");
381 usbhid
->last_ctrl
= jiffies
;
384 * queue work to wake up the device.
385 * as the work queue is freezeable, this is safe
386 * with respect to STD and STR
388 queue_work(resumption_waker
, &usbhid
->restart_work
);
395 * Output interrupt completion handler.
398 static void hid_irq_out(struct urb
*urb
)
400 struct hid_device
*hid
= urb
->context
;
401 struct usbhid_device
*usbhid
= hid
->driver_data
;
405 switch (urb
->status
) {
406 case 0: /* success */
408 case -ESHUTDOWN
: /* unplug */
410 case -EILSEQ
: /* protocol error or unplug */
411 case -EPROTO
: /* protocol error or unplug */
412 case -ECONNRESET
: /* unlink */
416 hid_warn(urb
->dev
, "output irq status %d received\n",
420 spin_lock_irqsave(&usbhid
->lock
, flags
);
423 usbhid
->outtail
= usbhid
->outhead
;
425 usbhid
->outtail
= (usbhid
->outtail
+ 1) & (HID_OUTPUT_FIFO_SIZE
- 1);
427 if (usbhid
->outhead
!= usbhid
->outtail
) {
428 if (hid_submit_out(hid
)) {
429 clear_bit(HID_OUT_RUNNING
, &usbhid
->iofl
);
430 wake_up(&usbhid
->wait
);
432 spin_unlock_irqrestore(&usbhid
->lock
, flags
);
436 clear_bit(HID_OUT_RUNNING
, &usbhid
->iofl
);
437 spin_unlock_irqrestore(&usbhid
->lock
, flags
);
438 wake_up(&usbhid
->wait
);
442 * Control pipe completion handler.
445 static void hid_ctrl(struct urb
*urb
)
447 struct hid_device
*hid
= urb
->context
;
448 struct usbhid_device
*usbhid
= hid
->driver_data
;
449 int unplug
= 0, status
= urb
->status
;
451 spin_lock(&usbhid
->lock
);
454 case 0: /* success */
455 if (usbhid
->ctrl
[usbhid
->ctrltail
].dir
== USB_DIR_IN
)
456 hid_input_report(urb
->context
,
457 usbhid
->ctrl
[usbhid
->ctrltail
].report
->type
,
458 urb
->transfer_buffer
, urb
->actual_length
, 0);
460 case -ESHUTDOWN
: /* unplug */
462 case -EILSEQ
: /* protocol error or unplug */
463 case -EPROTO
: /* protocol error or unplug */
464 case -ECONNRESET
: /* unlink */
466 case -EPIPE
: /* report not available */
469 hid_warn(urb
->dev
, "ctrl urb status %d received\n", status
);
473 usbhid
->ctrltail
= usbhid
->ctrlhead
;
475 usbhid
->ctrltail
= (usbhid
->ctrltail
+ 1) & (HID_CONTROL_FIFO_SIZE
- 1);
477 if (usbhid
->ctrlhead
!= usbhid
->ctrltail
) {
478 if (hid_submit_ctrl(hid
)) {
479 clear_bit(HID_CTRL_RUNNING
, &usbhid
->iofl
);
480 wake_up(&usbhid
->wait
);
482 spin_unlock(&usbhid
->lock
);
486 clear_bit(HID_CTRL_RUNNING
, &usbhid
->iofl
);
487 spin_unlock(&usbhid
->lock
);
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 if (!test_and_set_bit(HID_OUT_RUNNING
, &usbhid
->iofl
)) {
517 if (hid_submit_out(hid
))
518 clear_bit(HID_OUT_RUNNING
, &usbhid
->iofl
);
521 * the queue is known to run
522 * but an earlier request may be stuck
523 * we may need to time out
524 * no race because this is called under
527 if (time_after(jiffies
, usbhid
->last_out
+ HZ
* 5))
528 usb_unlink_urb(usbhid
->urbout
);
533 if ((head
= (usbhid
->ctrlhead
+ 1) & (HID_CONTROL_FIFO_SIZE
- 1)) == usbhid
->ctrltail
) {
534 hid_warn(hid
, "control queue full\n");
538 if (dir
== USB_DIR_OUT
) {
539 usbhid
->ctrl
[usbhid
->ctrlhead
].raw_report
= kmalloc(len
, GFP_ATOMIC
);
540 if (!usbhid
->ctrl
[usbhid
->ctrlhead
].raw_report
) {
541 hid_warn(hid
, "control queueing failed\n");
544 hid_output_report(report
, usbhid
->ctrl
[usbhid
->ctrlhead
].raw_report
);
546 usbhid
->ctrl
[usbhid
->ctrlhead
].report
= report
;
547 usbhid
->ctrl
[usbhid
->ctrlhead
].dir
= dir
;
548 usbhid
->ctrlhead
= head
;
550 if (!test_and_set_bit(HID_CTRL_RUNNING
, &usbhid
->iofl
)) {
551 if (hid_submit_ctrl(hid
))
552 clear_bit(HID_CTRL_RUNNING
, &usbhid
->iofl
);
555 * the queue is known to run
556 * but an earlier request may be stuck
557 * we may need to time out
558 * no race because this is called under
561 if (time_after(jiffies
, usbhid
->last_ctrl
+ HZ
* 5))
562 usb_unlink_urb(usbhid
->urbctrl
);
566 void usbhid_submit_report(struct hid_device
*hid
, struct hid_report
*report
, unsigned char dir
)
568 struct usbhid_device
*usbhid
= hid
->driver_data
;
571 spin_lock_irqsave(&usbhid
->lock
, flags
);
572 __usbhid_submit_report(hid
, report
, dir
);
573 spin_unlock_irqrestore(&usbhid
->lock
, flags
);
575 EXPORT_SYMBOL_GPL(usbhid_submit_report
);
577 static int usb_hidinput_input_event(struct input_dev
*dev
, unsigned int type
, unsigned int code
, int value
)
579 struct hid_device
*hid
= input_get_drvdata(dev
);
580 struct usbhid_device
*usbhid
= hid
->driver_data
;
581 struct hid_field
*field
;
586 return input_ff_event(dev
, type
, code
, value
);
591 if ((offset
= hidinput_find_field(hid
, type
, code
, &field
)) == -1) {
592 hid_warn(dev
, "event field not found\n");
596 hid_set_field(field
, offset
, value
);
598 spin_lock_irqsave(&usbhid
->lock
, flags
);
600 spin_unlock_irqrestore(&usbhid
->lock
, flags
);
602 spin_lock_irqsave(&usbhid
->lock
, flags
);
604 spin_unlock_irqrestore(&usbhid
->lock
, flags
);
606 usbhid_submit_report(hid
, field
->report
, USB_DIR_OUT
);
611 int usbhid_wait_io(struct hid_device
*hid
)
613 struct usbhid_device
*usbhid
= hid
->driver_data
;
615 if (!wait_event_timeout(usbhid
->wait
,
616 (!test_bit(HID_CTRL_RUNNING
, &usbhid
->iofl
) &&
617 !test_bit(HID_OUT_RUNNING
, &usbhid
->iofl
)),
619 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
625 EXPORT_SYMBOL_GPL(usbhid_wait_io
);
627 static int hid_set_idle(struct usb_device
*dev
, int ifnum
, int report
, int idle
)
629 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
630 HID_REQ_SET_IDLE
, USB_TYPE_CLASS
| USB_RECIP_INTERFACE
, (idle
<< 8) | report
,
631 ifnum
, NULL
, 0, USB_CTRL_SET_TIMEOUT
);
634 static int hid_get_class_descriptor(struct usb_device
*dev
, int ifnum
,
635 unsigned char type
, void *buf
, int size
)
637 int result
, retries
= 4;
639 memset(buf
, 0, size
);
642 result
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
643 USB_REQ_GET_DESCRIPTOR
, USB_RECIP_INTERFACE
| USB_DIR_IN
,
644 (type
<< 8), ifnum
, buf
, size
, USB_CTRL_GET_TIMEOUT
);
646 } while (result
< size
&& retries
);
650 int usbhid_open(struct hid_device
*hid
)
652 struct usbhid_device
*usbhid
= hid
->driver_data
;
655 mutex_lock(&hid_open_mut
);
657 res
= usb_autopm_get_interface(usbhid
->intf
);
658 /* the device must be awake to reliable request remote wakeup */
661 mutex_unlock(&hid_open_mut
);
664 usbhid
->intf
->needs_remote_wakeup
= 1;
665 if (hid_start_in(hid
))
668 usb_autopm_put_interface(usbhid
->intf
);
670 mutex_unlock(&hid_open_mut
);
674 void usbhid_close(struct hid_device
*hid
)
676 struct usbhid_device
*usbhid
= hid
->driver_data
;
678 mutex_lock(&hid_open_mut
);
680 /* protecting hid->open to make sure we don't restart
681 * data acquistion due to a resumption we no longer
684 spin_lock_irq(&usbhid
->lock
);
686 spin_unlock_irq(&usbhid
->lock
);
687 hid_cancel_delayed_stuff(usbhid
);
688 usb_kill_urb(usbhid
->urbin
);
689 usbhid
->intf
->needs_remote_wakeup
= 0;
691 spin_unlock_irq(&usbhid
->lock
);
693 mutex_unlock(&hid_open_mut
);
697 * Initialize all reports
700 void usbhid_init_reports(struct hid_device
*hid
)
702 struct hid_report
*report
;
703 struct usbhid_device
*usbhid
= hid
->driver_data
;
706 list_for_each_entry(report
, &hid
->report_enum
[HID_INPUT_REPORT
].report_list
, list
)
707 usbhid_submit_report(hid
, report
, USB_DIR_IN
);
709 list_for_each_entry(report
, &hid
->report_enum
[HID_FEATURE_REPORT
].report_list
, list
)
710 usbhid_submit_report(hid
, report
, USB_DIR_IN
);
713 ret
= usbhid_wait_io(hid
);
716 if (test_bit(HID_CTRL_RUNNING
, &usbhid
->iofl
))
717 usb_kill_urb(usbhid
->urbctrl
);
718 if (test_bit(HID_OUT_RUNNING
, &usbhid
->iofl
))
719 usb_kill_urb(usbhid
->urbout
);
720 ret
= usbhid_wait_io(hid
);
724 hid_warn(hid
, "timeout initializing reports\n");
728 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
730 static int hid_find_field_early(struct hid_device
*hid
, unsigned int page
,
731 unsigned int hid_code
, struct hid_field
**pfield
)
733 struct hid_report
*report
;
734 struct hid_field
*field
;
735 struct hid_usage
*usage
;
738 list_for_each_entry(report
, &hid
->report_enum
[HID_OUTPUT_REPORT
].report_list
, list
) {
739 for (i
= 0; i
< report
->maxfield
; i
++) {
740 field
= report
->field
[i
];
741 for (j
= 0; j
< field
->maxusage
; j
++) {
742 usage
= &field
->usage
[j
];
743 if ((usage
->hid
& HID_USAGE_PAGE
) == page
&&
744 (usage
->hid
& 0xFFFF) == hid_code
) {
754 void usbhid_set_leds(struct hid_device
*hid
)
756 struct hid_field
*field
;
759 if ((offset
= hid_find_field_early(hid
, HID_UP_LED
, 0x01, &field
)) != -1) {
760 hid_set_field(field
, offset
, 0);
761 usbhid_submit_report(hid
, field
->report
, USB_DIR_OUT
);
764 EXPORT_SYMBOL_GPL(usbhid_set_leds
);
767 * Traverse the supplied list of reports and find the longest
769 static void hid_find_max_report(struct hid_device
*hid
, unsigned int type
,
772 struct hid_report
*report
;
775 list_for_each_entry(report
, &hid
->report_enum
[type
].report_list
, list
) {
776 size
= ((report
->size
- 1) >> 3) + 1 + hid
->report_enum
[type
].numbered
;
782 static int hid_alloc_buffers(struct usb_device
*dev
, struct hid_device
*hid
)
784 struct usbhid_device
*usbhid
= hid
->driver_data
;
786 usbhid
->inbuf
= usb_alloc_coherent(dev
, usbhid
->bufsize
, GFP_KERNEL
,
788 usbhid
->outbuf
= usb_alloc_coherent(dev
, usbhid
->bufsize
, GFP_KERNEL
,
789 &usbhid
->outbuf_dma
);
790 usbhid
->cr
= kmalloc(sizeof(*usbhid
->cr
), GFP_KERNEL
);
791 usbhid
->ctrlbuf
= usb_alloc_coherent(dev
, usbhid
->bufsize
, GFP_KERNEL
,
792 &usbhid
->ctrlbuf_dma
);
793 if (!usbhid
->inbuf
|| !usbhid
->outbuf
|| !usbhid
->cr
||
800 static int usbhid_output_raw_report(struct hid_device
*hid
, __u8
*buf
, size_t count
,
801 unsigned char report_type
)
803 struct usbhid_device
*usbhid
= hid
->driver_data
;
804 struct usb_device
*dev
= hid_to_usb_dev(hid
);
805 struct usb_interface
*intf
= usbhid
->intf
;
806 struct usb_host_interface
*interface
= intf
->cur_altsetting
;
809 if (usbhid
->urbout
&& report_type
!= HID_FEATURE_REPORT
) {
811 int skipped_report_id
= 0;
814 /* Don't send the Report ID */
817 skipped_report_id
= 1;
819 ret
= usb_interrupt_msg(dev
, usbhid
->urbout
->pipe
,
820 buf
, count
, &actual_length
,
821 USB_CTRL_SET_TIMEOUT
);
822 /* return the number of bytes transferred */
825 /* count also the report id */
826 if (skipped_report_id
)
830 int skipped_report_id
= 0;
831 int report_id
= buf
[0];
833 /* Don't send the Report ID */
836 skipped_report_id
= 1;
838 ret
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
840 USB_DIR_OUT
| USB_TYPE_CLASS
| USB_RECIP_INTERFACE
,
841 ((report_type
+ 1) << 8) | report_id
,
842 interface
->desc
.bInterfaceNumber
, buf
, count
,
843 USB_CTRL_SET_TIMEOUT
);
844 /* count also the report id, if this was a numbered report. */
845 if (ret
> 0 && skipped_report_id
)
852 static void usbhid_restart_queues(struct usbhid_device
*usbhid
)
855 usbhid_restart_out_queue(usbhid
);
856 usbhid_restart_ctrl_queue(usbhid
);
859 static void __usbhid_restart_queues(struct work_struct
*work
)
861 struct usbhid_device
*usbhid
=
862 container_of(work
, struct usbhid_device
, restart_work
);
865 r
= usb_autopm_get_interface(usbhid
->intf
);
868 usb_autopm_put_interface(usbhid
->intf
);
871 static void hid_free_buffers(struct usb_device
*dev
, struct hid_device
*hid
)
873 struct usbhid_device
*usbhid
= hid
->driver_data
;
875 usb_free_coherent(dev
, usbhid
->bufsize
, usbhid
->inbuf
, usbhid
->inbuf_dma
);
876 usb_free_coherent(dev
, usbhid
->bufsize
, usbhid
->outbuf
, usbhid
->outbuf_dma
);
878 usb_free_coherent(dev
, usbhid
->bufsize
, usbhid
->ctrlbuf
, usbhid
->ctrlbuf_dma
);
881 static int usbhid_parse(struct hid_device
*hid
)
883 struct usb_interface
*intf
= to_usb_interface(hid
->dev
.parent
);
884 struct usb_host_interface
*interface
= intf
->cur_altsetting
;
885 struct usb_device
*dev
= interface_to_usbdev (intf
);
886 struct hid_descriptor
*hdesc
;
888 unsigned int rsize
= 0;
892 quirks
= usbhid_lookup_quirk(le16_to_cpu(dev
->descriptor
.idVendor
),
893 le16_to_cpu(dev
->descriptor
.idProduct
));
895 if (quirks
& HID_QUIRK_IGNORE
)
898 /* Many keyboards and mice don't like to be polled for reports,
899 * so we will always set the HID_QUIRK_NOGET flag for them. */
900 if (interface
->desc
.bInterfaceSubClass
== USB_INTERFACE_SUBCLASS_BOOT
) {
901 if (interface
->desc
.bInterfaceProtocol
== USB_INTERFACE_PROTOCOL_KEYBOARD
||
902 interface
->desc
.bInterfaceProtocol
== USB_INTERFACE_PROTOCOL_MOUSE
)
903 quirks
|= HID_QUIRK_NOGET
;
906 if (usb_get_extra_descriptor(interface
, HID_DT_HID
, &hdesc
) &&
907 (!interface
->desc
.bNumEndpoints
||
908 usb_get_extra_descriptor(&interface
->endpoint
[0], HID_DT_HID
, &hdesc
))) {
909 dbg_hid("class descriptor not present\n");
913 hid
->version
= le16_to_cpu(hdesc
->bcdHID
);
914 hid
->country
= hdesc
->bCountryCode
;
916 for (n
= 0; n
< hdesc
->bNumDescriptors
; n
++)
917 if (hdesc
->desc
[n
].bDescriptorType
== HID_DT_REPORT
)
918 rsize
= le16_to_cpu(hdesc
->desc
[n
].wDescriptorLength
);
920 if (!rsize
|| rsize
> HID_MAX_DESCRIPTOR_SIZE
) {
921 dbg_hid("weird size of report descriptor (%u)\n", rsize
);
925 if (!(rdesc
= kmalloc(rsize
, GFP_KERNEL
))) {
926 dbg_hid("couldn't allocate rdesc memory\n");
930 hid_set_idle(dev
, interface
->desc
.bInterfaceNumber
, 0, 0);
932 ret
= hid_get_class_descriptor(dev
, interface
->desc
.bInterfaceNumber
,
933 HID_DT_REPORT
, rdesc
, rsize
);
935 dbg_hid("reading report descriptor failed\n");
940 ret
= hid_parse_report(hid
, rdesc
, rsize
);
943 dbg_hid("parsing report descriptor failed\n");
947 hid
->quirks
|= quirks
;
954 static int usbhid_start(struct hid_device
*hid
)
956 struct usb_interface
*intf
= to_usb_interface(hid
->dev
.parent
);
957 struct usb_host_interface
*interface
= intf
->cur_altsetting
;
958 struct usb_device
*dev
= interface_to_usbdev(intf
);
959 struct usbhid_device
*usbhid
= hid
->driver_data
;
960 unsigned int n
, insize
= 0;
963 clear_bit(HID_DISCONNECTED
, &usbhid
->iofl
);
965 usbhid
->bufsize
= HID_MIN_BUFFER_SIZE
;
966 hid_find_max_report(hid
, HID_INPUT_REPORT
, &usbhid
->bufsize
);
967 hid_find_max_report(hid
, HID_OUTPUT_REPORT
, &usbhid
->bufsize
);
968 hid_find_max_report(hid
, HID_FEATURE_REPORT
, &usbhid
->bufsize
);
970 if (usbhid
->bufsize
> HID_MAX_BUFFER_SIZE
)
971 usbhid
->bufsize
= HID_MAX_BUFFER_SIZE
;
973 hid_find_max_report(hid
, HID_INPUT_REPORT
, &insize
);
975 if (insize
> HID_MAX_BUFFER_SIZE
)
976 insize
= HID_MAX_BUFFER_SIZE
;
978 if (hid_alloc_buffers(dev
, hid
)) {
983 for (n
= 0; n
< interface
->desc
.bNumEndpoints
; n
++) {
984 struct usb_endpoint_descriptor
*endpoint
;
988 endpoint
= &interface
->endpoint
[n
].desc
;
989 if (!usb_endpoint_xfer_int(endpoint
))
992 interval
= endpoint
->bInterval
;
994 /* Some vendors give fullspeed interval on highspeed devides */
995 if (hid
->quirks
& HID_QUIRK_FULLSPEED_INTERVAL
&&
996 dev
->speed
== USB_SPEED_HIGH
) {
997 interval
= fls(endpoint
->bInterval
*8);
998 printk(KERN_INFO
"%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
999 hid
->name
, endpoint
->bInterval
, interval
);
1002 /* Change the polling interval of mice. */
1003 if (hid
->collection
->usage
== HID_GD_MOUSE
&& hid_mousepoll_interval
> 0)
1004 interval
= hid_mousepoll_interval
;
1007 if (usb_endpoint_dir_in(endpoint
)) {
1010 if (!(usbhid
->urbin
= usb_alloc_urb(0, GFP_KERNEL
)))
1012 pipe
= usb_rcvintpipe(dev
, endpoint
->bEndpointAddress
);
1013 usb_fill_int_urb(usbhid
->urbin
, dev
, pipe
, usbhid
->inbuf
, insize
,
1014 hid_irq_in
, hid
, interval
);
1015 usbhid
->urbin
->transfer_dma
= usbhid
->inbuf_dma
;
1016 usbhid
->urbin
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
1020 if (!(usbhid
->urbout
= usb_alloc_urb(0, GFP_KERNEL
)))
1022 pipe
= usb_sndintpipe(dev
, endpoint
->bEndpointAddress
);
1023 usb_fill_int_urb(usbhid
->urbout
, dev
, pipe
, usbhid
->outbuf
, 0,
1024 hid_irq_out
, hid
, interval
);
1025 usbhid
->urbout
->transfer_dma
= usbhid
->outbuf_dma
;
1026 usbhid
->urbout
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
1030 usbhid
->urbctrl
= usb_alloc_urb(0, GFP_KERNEL
);
1031 if (!usbhid
->urbctrl
) {
1036 usb_fill_control_urb(usbhid
->urbctrl
, dev
, 0, (void *) usbhid
->cr
,
1037 usbhid
->ctrlbuf
, 1, hid_ctrl
, hid
);
1038 usbhid
->urbctrl
->transfer_dma
= usbhid
->ctrlbuf_dma
;
1039 usbhid
->urbctrl
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
1041 if (!(hid
->quirks
& HID_QUIRK_NO_INIT_REPORTS
))
1042 usbhid_init_reports(hid
);
1044 set_bit(HID_STARTED
, &usbhid
->iofl
);
1046 /* Some keyboards don't work until their LEDs have been set.
1047 * Since BIOSes do set the LEDs, it must be safe for any device
1048 * that supports the keyboard boot protocol.
1049 * In addition, enable remote wakeup by default for all keyboard
1050 * devices supporting the boot protocol.
1052 if (interface
->desc
.bInterfaceSubClass
== USB_INTERFACE_SUBCLASS_BOOT
&&
1053 interface
->desc
.bInterfaceProtocol
==
1054 USB_INTERFACE_PROTOCOL_KEYBOARD
) {
1055 usbhid_set_leds(hid
);
1056 device_set_wakeup_enable(&dev
->dev
, 1);
1061 usb_free_urb(usbhid
->urbin
);
1062 usb_free_urb(usbhid
->urbout
);
1063 usb_free_urb(usbhid
->urbctrl
);
1064 usbhid
->urbin
= NULL
;
1065 usbhid
->urbout
= NULL
;
1066 usbhid
->urbctrl
= NULL
;
1067 hid_free_buffers(dev
, hid
);
1071 static void usbhid_stop(struct hid_device
*hid
)
1073 struct usbhid_device
*usbhid
= hid
->driver_data
;
1075 if (WARN_ON(!usbhid
))
1078 clear_bit(HID_STARTED
, &usbhid
->iofl
);
1079 spin_lock_irq(&usbhid
->lock
); /* Sync with error handler */
1080 set_bit(HID_DISCONNECTED
, &usbhid
->iofl
);
1081 spin_unlock_irq(&usbhid
->lock
);
1082 usb_kill_urb(usbhid
->urbin
);
1083 usb_kill_urb(usbhid
->urbout
);
1084 usb_kill_urb(usbhid
->urbctrl
);
1086 hid_cancel_delayed_stuff(usbhid
);
1090 usb_free_urb(usbhid
->urbin
);
1091 usb_free_urb(usbhid
->urbctrl
);
1092 usb_free_urb(usbhid
->urbout
);
1093 usbhid
->urbin
= NULL
; /* don't mess up next start */
1094 usbhid
->urbctrl
= NULL
;
1095 usbhid
->urbout
= NULL
;
1097 hid_free_buffers(hid_to_usb_dev(hid
), hid
);
1100 static int usbhid_power(struct hid_device
*hid
, int lvl
)
1105 case PM_HINT_FULLON
:
1106 r
= usbhid_get_power(hid
);
1108 case PM_HINT_NORMAL
:
1109 usbhid_put_power(hid
);
1115 static struct hid_ll_driver usb_hid_driver
= {
1116 .parse
= usbhid_parse
,
1117 .start
= usbhid_start
,
1118 .stop
= usbhid_stop
,
1119 .open
= usbhid_open
,
1120 .close
= usbhid_close
,
1121 .power
= usbhid_power
,
1122 .hidinput_input_event
= usb_hidinput_input_event
,
1125 static int usbhid_probe(struct usb_interface
*intf
, const struct usb_device_id
*id
)
1127 struct usb_host_interface
*interface
= intf
->cur_altsetting
;
1128 struct usb_device
*dev
= interface_to_usbdev(intf
);
1129 struct usbhid_device
*usbhid
;
1130 struct hid_device
*hid
;
1131 unsigned int n
, has_in
= 0;
1135 dbg_hid("HID probe called for ifnum %d\n",
1136 intf
->altsetting
->desc
.bInterfaceNumber
);
1138 for (n
= 0; n
< interface
->desc
.bNumEndpoints
; n
++)
1139 if (usb_endpoint_is_int_in(&interface
->endpoint
[n
].desc
))
1142 hid_err(intf
, "couldn't find an input interrupt endpoint\n");
1146 hid
= hid_allocate_device();
1148 return PTR_ERR(hid
);
1150 usb_set_intfdata(intf
, hid
);
1151 hid
->ll_driver
= &usb_hid_driver
;
1152 hid
->hid_output_raw_report
= usbhid_output_raw_report
;
1153 hid
->ff_init
= hid_pidff_init
;
1154 #ifdef CONFIG_USB_HIDDEV
1155 hid
->hiddev_connect
= hiddev_connect
;
1156 hid
->hiddev_disconnect
= hiddev_disconnect
;
1157 hid
->hiddev_hid_event
= hiddev_hid_event
;
1158 hid
->hiddev_report_event
= hiddev_report_event
;
1160 hid
->dev
.parent
= &intf
->dev
;
1162 hid
->vendor
= le16_to_cpu(dev
->descriptor
.idVendor
);
1163 hid
->product
= le16_to_cpu(dev
->descriptor
.idProduct
);
1165 hid
->quirks
= usbhid_lookup_quirk(hid
->vendor
, hid
->product
);
1166 if (intf
->cur_altsetting
->desc
.bInterfaceProtocol
==
1167 USB_INTERFACE_PROTOCOL_MOUSE
)
1168 hid
->type
= HID_TYPE_USBMOUSE
;
1170 if (dev
->manufacturer
)
1171 strlcpy(hid
->name
, dev
->manufacturer
, sizeof(hid
->name
));
1174 if (dev
->manufacturer
)
1175 strlcat(hid
->name
, " ", sizeof(hid
->name
));
1176 strlcat(hid
->name
, dev
->product
, sizeof(hid
->name
));
1179 if (!strlen(hid
->name
))
1180 snprintf(hid
->name
, sizeof(hid
->name
), "HID %04x:%04x",
1181 le16_to_cpu(dev
->descriptor
.idVendor
),
1182 le16_to_cpu(dev
->descriptor
.idProduct
));
1184 usb_make_path(dev
, hid
->phys
, sizeof(hid
->phys
));
1185 strlcat(hid
->phys
, "/input", sizeof(hid
->phys
));
1186 len
= strlen(hid
->phys
);
1187 if (len
< sizeof(hid
->phys
) - 1)
1188 snprintf(hid
->phys
+ len
, sizeof(hid
->phys
) - len
,
1189 "%d", intf
->altsetting
[0].desc
.bInterfaceNumber
);
1191 if (usb_string(dev
, dev
->descriptor
.iSerialNumber
, hid
->uniq
, 64) <= 0)
1194 usbhid
= kzalloc(sizeof(*usbhid
), GFP_KERNEL
);
1195 if (usbhid
== NULL
) {
1200 hid
->driver_data
= usbhid
;
1202 usbhid
->intf
= intf
;
1203 usbhid
->ifnum
= interface
->desc
.bInterfaceNumber
;
1205 init_waitqueue_head(&usbhid
->wait
);
1206 INIT_WORK(&usbhid
->reset_work
, hid_reset
);
1207 INIT_WORK(&usbhid
->restart_work
, __usbhid_restart_queues
);
1208 setup_timer(&usbhid
->io_retry
, hid_retry_timeout
, (unsigned long) hid
);
1209 spin_lock_init(&usbhid
->lock
);
1211 ret
= hid_add_device(hid
);
1214 hid_err(intf
, "can't add hid device: %d\n", ret
);
1222 hid_destroy_device(hid
);
1226 static void usbhid_disconnect(struct usb_interface
*intf
)
1228 struct hid_device
*hid
= usb_get_intfdata(intf
);
1229 struct usbhid_device
*usbhid
;
1234 usbhid
= hid
->driver_data
;
1235 hid_destroy_device(hid
);
1239 static void hid_cancel_delayed_stuff(struct usbhid_device
*usbhid
)
1241 del_timer_sync(&usbhid
->io_retry
);
1242 cancel_work_sync(&usbhid
->restart_work
);
1243 cancel_work_sync(&usbhid
->reset_work
);
1246 static void hid_cease_io(struct usbhid_device
*usbhid
)
1248 del_timer(&usbhid
->io_retry
);
1249 usb_kill_urb(usbhid
->urbin
);
1250 usb_kill_urb(usbhid
->urbctrl
);
1251 usb_kill_urb(usbhid
->urbout
);
1254 /* Treat USB reset pretty much the same as suspend/resume */
1255 static int hid_pre_reset(struct usb_interface
*intf
)
1257 struct hid_device
*hid
= usb_get_intfdata(intf
);
1258 struct usbhid_device
*usbhid
= hid
->driver_data
;
1260 spin_lock_irq(&usbhid
->lock
);
1261 set_bit(HID_RESET_PENDING
, &usbhid
->iofl
);
1262 spin_unlock_irq(&usbhid
->lock
);
1263 cancel_work_sync(&usbhid
->restart_work
);
1264 hid_cease_io(usbhid
);
1269 /* Same routine used for post_reset and reset_resume */
1270 static int hid_post_reset(struct usb_interface
*intf
)
1272 struct usb_device
*dev
= interface_to_usbdev (intf
);
1273 struct hid_device
*hid
= usb_get_intfdata(intf
);
1274 struct usbhid_device
*usbhid
= hid
->driver_data
;
1277 spin_lock_irq(&usbhid
->lock
);
1278 clear_bit(HID_RESET_PENDING
, &usbhid
->iofl
);
1279 spin_unlock_irq(&usbhid
->lock
);
1280 hid_set_idle(dev
, intf
->cur_altsetting
->desc
.bInterfaceNumber
, 0, 0);
1281 status
= hid_start_in(hid
);
1284 usbhid_restart_queues(usbhid
);
1289 int usbhid_get_power(struct hid_device
*hid
)
1291 struct usbhid_device
*usbhid
= hid
->driver_data
;
1293 return usb_autopm_get_interface(usbhid
->intf
);
1296 void usbhid_put_power(struct hid_device
*hid
)
1298 struct usbhid_device
*usbhid
= hid
->driver_data
;
1300 usb_autopm_put_interface(usbhid
->intf
);
1305 static int hid_suspend(struct usb_interface
*intf
, pm_message_t message
)
1307 struct hid_device
*hid
= usb_get_intfdata(intf
);
1308 struct usbhid_device
*usbhid
= hid
->driver_data
;
1311 if (message
.event
& PM_EVENT_AUTO
) {
1312 spin_lock_irq(&usbhid
->lock
); /* Sync with error handler */
1313 if (!test_bit(HID_RESET_PENDING
, &usbhid
->iofl
)
1314 && !test_bit(HID_CLEAR_HALT
, &usbhid
->iofl
)
1315 && !test_bit(HID_OUT_RUNNING
, &usbhid
->iofl
)
1316 && !test_bit(HID_CTRL_RUNNING
, &usbhid
->iofl
)
1317 && !test_bit(HID_KEYS_PRESSED
, &usbhid
->iofl
)
1318 && (!usbhid
->ledcount
|| ignoreled
))
1320 set_bit(HID_REPORTED_IDLE
, &usbhid
->iofl
);
1321 spin_unlock_irq(&usbhid
->lock
);
1322 if (hid
->driver
&& hid
->driver
->suspend
) {
1323 status
= hid
->driver
->suspend(hid
, message
);
1328 usbhid_mark_busy(usbhid
);
1329 spin_unlock_irq(&usbhid
->lock
);
1334 if (hid
->driver
&& hid
->driver
->suspend
) {
1335 status
= hid
->driver
->suspend(hid
, message
);
1339 spin_lock_irq(&usbhid
->lock
);
1340 set_bit(HID_REPORTED_IDLE
, &usbhid
->iofl
);
1341 spin_unlock_irq(&usbhid
->lock
);
1342 if (usbhid_wait_io(hid
) < 0)
1346 if (!ignoreled
&& (message
.event
& PM_EVENT_AUTO
)) {
1347 spin_lock_irq(&usbhid
->lock
);
1348 if (test_bit(HID_LED_ON
, &usbhid
->iofl
)) {
1349 spin_unlock_irq(&usbhid
->lock
);
1350 usbhid_mark_busy(usbhid
);
1353 spin_unlock_irq(&usbhid
->lock
);
1356 hid_cancel_delayed_stuff(usbhid
);
1357 hid_cease_io(usbhid
);
1359 if ((message
.event
& PM_EVENT_AUTO
) &&
1360 test_bit(HID_KEYS_PRESSED
, &usbhid
->iofl
)) {
1361 /* lost race against keypresses */
1362 status
= hid_start_in(hid
);
1365 usbhid_mark_busy(usbhid
);
1368 dev_dbg(&intf
->dev
, "suspend\n");
1372 static int hid_resume(struct usb_interface
*intf
)
1374 struct hid_device
*hid
= usb_get_intfdata (intf
);
1375 struct usbhid_device
*usbhid
= hid
->driver_data
;
1378 if (!test_bit(HID_STARTED
, &usbhid
->iofl
))
1381 clear_bit(HID_REPORTED_IDLE
, &usbhid
->iofl
);
1382 usbhid_mark_busy(usbhid
);
1384 if (test_bit(HID_CLEAR_HALT
, &usbhid
->iofl
) ||
1385 test_bit(HID_RESET_PENDING
, &usbhid
->iofl
))
1386 schedule_work(&usbhid
->reset_work
);
1387 usbhid
->retry_delay
= 0;
1388 status
= hid_start_in(hid
);
1391 usbhid_restart_queues(usbhid
);
1393 if (status
>= 0 && hid
->driver
&& hid
->driver
->resume
) {
1394 int ret
= hid
->driver
->resume(hid
);
1398 dev_dbg(&intf
->dev
, "resume status %d\n", status
);
1402 static int hid_reset_resume(struct usb_interface
*intf
)
1404 struct hid_device
*hid
= usb_get_intfdata(intf
);
1405 struct usbhid_device
*usbhid
= hid
->driver_data
;
1408 clear_bit(HID_REPORTED_IDLE
, &usbhid
->iofl
);
1409 status
= hid_post_reset(intf
);
1410 if (status
>= 0 && hid
->driver
&& hid
->driver
->reset_resume
) {
1411 int ret
= hid
->driver
->reset_resume(hid
);
1418 #endif /* CONFIG_PM */
1420 static const struct usb_device_id hid_usb_ids
[] = {
1421 { .match_flags
= USB_DEVICE_ID_MATCH_INT_CLASS
,
1422 .bInterfaceClass
= USB_INTERFACE_CLASS_HID
},
1423 { } /* Terminating entry */
1426 MODULE_DEVICE_TABLE (usb
, hid_usb_ids
);
1428 static struct usb_driver hid_driver
= {
1430 .probe
= usbhid_probe
,
1431 .disconnect
= usbhid_disconnect
,
1433 .suspend
= hid_suspend
,
1434 .resume
= hid_resume
,
1435 .reset_resume
= hid_reset_resume
,
1437 .pre_reset
= hid_pre_reset
,
1438 .post_reset
= hid_post_reset
,
1439 .id_table
= hid_usb_ids
,
1440 .supports_autosuspend
= 1,
1443 static const struct hid_device_id hid_usb_table
[] = {
1444 { HID_USB_DEVICE(HID_ANY_ID
, HID_ANY_ID
) },
1448 struct usb_interface
*usbhid_find_interface(int minor
)
1450 return usb_find_interface(&hid_driver
, minor
);
1453 static struct hid_driver hid_usb_driver
= {
1454 .name
= "generic-usb",
1455 .id_table
= hid_usb_table
,
1458 static int __init
hid_init(void)
1460 int retval
= -ENOMEM
;
1462 resumption_waker
= create_freezeable_workqueue("usbhid_resumer");
1463 if (!resumption_waker
)
1465 retval
= hid_register_driver(&hid_usb_driver
);
1467 goto hid_register_fail
;
1468 retval
= usbhid_quirks_init(quirks_param
);
1470 goto usbhid_quirks_init_fail
;
1471 retval
= usb_register(&hid_driver
);
1473 goto usb_register_fail
;
1474 printk(KERN_INFO KBUILD_MODNAME
": " DRIVER_DESC
"\n");
1478 usbhid_quirks_exit();
1479 usbhid_quirks_init_fail
:
1480 hid_unregister_driver(&hid_usb_driver
);
1482 destroy_workqueue(resumption_waker
);
1487 static void __exit
hid_exit(void)
1489 usb_deregister(&hid_driver
);
1490 usbhid_quirks_exit();
1491 hid_unregister_driver(&hid_usb_driver
);
1492 destroy_workqueue(resumption_waker
);
1495 module_init(hid_init
);
1496 module_exit(hid_exit
);
1498 MODULE_AUTHOR("Andreas Gal");
1499 MODULE_AUTHOR("Vojtech Pavlik");
1500 MODULE_AUTHOR("Jiri Kosina");
1501 MODULE_DESCRIPTION(DRIVER_DESC
);
1502 MODULE_LICENSE(DRIVER_LICENSE
);