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 err_hid("can't reset device, %s-%s/input%d, status %d",
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 dev_warn(&urb
->dev
->dev
, "input irq status %d "
282 "received\n", urb
->status
);
285 status
= usb_submit_urb(urb
, GFP_ATOMIC
);
287 clear_bit(HID_IN_RUNNING
, &usbhid
->iofl
);
288 if (status
!= -EPERM
) {
289 err_hid("can't resubmit intr, %s-%s/input%d, status %d",
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 err_hid("usb_submit_urb(out) failed");
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 err_hid("usb_submit_urb(ctrl) failed");
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 dev_warn(&urb
->dev
->dev
, "output irq status %d "
417 "received\n", urb
->status
);
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 dev_warn(&urb
->dev
->dev
, "ctrl urb status %d "
470 "received\n", status
);
474 usbhid
->ctrltail
= usbhid
->ctrlhead
;
476 usbhid
->ctrltail
= (usbhid
->ctrltail
+ 1) & (HID_CONTROL_FIFO_SIZE
- 1);
478 if (usbhid
->ctrlhead
!= usbhid
->ctrltail
) {
479 if (hid_submit_ctrl(hid
)) {
480 clear_bit(HID_CTRL_RUNNING
, &usbhid
->iofl
);
481 wake_up(&usbhid
->wait
);
483 spin_unlock(&usbhid
->lock
);
487 clear_bit(HID_CTRL_RUNNING
, &usbhid
->iofl
);
488 spin_unlock(&usbhid
->lock
);
489 wake_up(&usbhid
->wait
);
492 static void __usbhid_submit_report(struct hid_device
*hid
, struct hid_report
*report
,
496 struct usbhid_device
*usbhid
= hid
->driver_data
;
497 int len
= ((report
->size
- 1) >> 3) + 1 + (report
->id
> 0);
499 if ((hid
->quirks
& HID_QUIRK_NOGET
) && dir
== USB_DIR_IN
)
502 if (usbhid
->urbout
&& dir
== USB_DIR_OUT
&& report
->type
== HID_OUTPUT_REPORT
) {
503 if ((head
= (usbhid
->outhead
+ 1) & (HID_OUTPUT_FIFO_SIZE
- 1)) == usbhid
->outtail
) {
504 dev_warn(&hid
->dev
, "output queue full\n");
508 usbhid
->out
[usbhid
->outhead
].raw_report
= kmalloc(len
, GFP_ATOMIC
);
509 if (!usbhid
->out
[usbhid
->outhead
].raw_report
) {
510 dev_warn(&hid
->dev
, "output queueing failed\n");
513 hid_output_report(report
, usbhid
->out
[usbhid
->outhead
].raw_report
);
514 usbhid
->out
[usbhid
->outhead
].report
= report
;
515 usbhid
->outhead
= head
;
517 if (!test_and_set_bit(HID_OUT_RUNNING
, &usbhid
->iofl
)) {
518 if (hid_submit_out(hid
))
519 clear_bit(HID_OUT_RUNNING
, &usbhid
->iofl
);
522 * the queue is known to run
523 * but an earlier request may be stuck
524 * we may need to time out
525 * no race because this is called under
528 if (time_after(jiffies
, usbhid
->last_out
+ HZ
* 5))
529 usb_unlink_urb(usbhid
->urbout
);
534 if ((head
= (usbhid
->ctrlhead
+ 1) & (HID_CONTROL_FIFO_SIZE
- 1)) == usbhid
->ctrltail
) {
535 dev_warn(&hid
->dev
, "control queue full\n");
539 if (dir
== USB_DIR_OUT
) {
540 usbhid
->ctrl
[usbhid
->ctrlhead
].raw_report
= kmalloc(len
, GFP_ATOMIC
);
541 if (!usbhid
->ctrl
[usbhid
->ctrlhead
].raw_report
) {
542 dev_warn(&hid
->dev
, "control queueing failed\n");
545 hid_output_report(report
, usbhid
->ctrl
[usbhid
->ctrlhead
].raw_report
);
547 usbhid
->ctrl
[usbhid
->ctrlhead
].report
= report
;
548 usbhid
->ctrl
[usbhid
->ctrlhead
].dir
= dir
;
549 usbhid
->ctrlhead
= head
;
551 if (!test_and_set_bit(HID_CTRL_RUNNING
, &usbhid
->iofl
)) {
552 if (hid_submit_ctrl(hid
))
553 clear_bit(HID_CTRL_RUNNING
, &usbhid
->iofl
);
556 * the queue is known to run
557 * but an earlier request may be stuck
558 * we may need to time out
559 * no race because this is called under
562 if (time_after(jiffies
, usbhid
->last_ctrl
+ HZ
* 5))
563 usb_unlink_urb(usbhid
->urbctrl
);
567 void usbhid_submit_report(struct hid_device
*hid
, struct hid_report
*report
, unsigned char dir
)
569 struct usbhid_device
*usbhid
= hid
->driver_data
;
572 spin_lock_irqsave(&usbhid
->lock
, flags
);
573 __usbhid_submit_report(hid
, report
, dir
);
574 spin_unlock_irqrestore(&usbhid
->lock
, flags
);
576 EXPORT_SYMBOL_GPL(usbhid_submit_report
);
578 static int usb_hidinput_input_event(struct input_dev
*dev
, unsigned int type
, unsigned int code
, int value
)
580 struct hid_device
*hid
= input_get_drvdata(dev
);
581 struct usbhid_device
*usbhid
= hid
->driver_data
;
582 struct hid_field
*field
;
587 return input_ff_event(dev
, type
, code
, value
);
592 if ((offset
= hidinput_find_field(hid
, type
, code
, &field
)) == -1) {
593 dev_warn(&dev
->dev
, "event field not found\n");
597 hid_set_field(field
, offset
, value
);
599 spin_lock_irqsave(&usbhid
->lock
, flags
);
601 spin_unlock_irqrestore(&usbhid
->lock
, flags
);
603 spin_lock_irqsave(&usbhid
->lock
, flags
);
605 spin_unlock_irqrestore(&usbhid
->lock
, flags
);
607 usbhid_submit_report(hid
, field
->report
, USB_DIR_OUT
);
612 int usbhid_wait_io(struct hid_device
*hid
)
614 struct usbhid_device
*usbhid
= hid
->driver_data
;
616 if (!wait_event_timeout(usbhid
->wait
,
617 (!test_bit(HID_CTRL_RUNNING
, &usbhid
->iofl
) &&
618 !test_bit(HID_OUT_RUNNING
, &usbhid
->iofl
)),
620 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
626 EXPORT_SYMBOL_GPL(usbhid_wait_io
);
628 static int hid_set_idle(struct usb_device
*dev
, int ifnum
, int report
, int idle
)
630 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
631 HID_REQ_SET_IDLE
, USB_TYPE_CLASS
| USB_RECIP_INTERFACE
, (idle
<< 8) | report
,
632 ifnum
, NULL
, 0, USB_CTRL_SET_TIMEOUT
);
635 static int hid_get_class_descriptor(struct usb_device
*dev
, int ifnum
,
636 unsigned char type
, void *buf
, int size
)
638 int result
, retries
= 4;
640 memset(buf
, 0, size
);
643 result
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
644 USB_REQ_GET_DESCRIPTOR
, USB_RECIP_INTERFACE
| USB_DIR_IN
,
645 (type
<< 8), ifnum
, buf
, size
, USB_CTRL_GET_TIMEOUT
);
647 } while (result
< size
&& retries
);
651 int usbhid_open(struct hid_device
*hid
)
653 struct usbhid_device
*usbhid
= hid
->driver_data
;
656 mutex_lock(&hid_open_mut
);
658 res
= usb_autopm_get_interface(usbhid
->intf
);
659 /* the device must be awake to reliable request remote wakeup */
662 mutex_unlock(&hid_open_mut
);
665 usbhid
->intf
->needs_remote_wakeup
= 1;
666 if (hid_start_in(hid
))
669 usb_autopm_put_interface(usbhid
->intf
);
671 mutex_unlock(&hid_open_mut
);
675 void usbhid_close(struct hid_device
*hid
)
677 struct usbhid_device
*usbhid
= hid
->driver_data
;
679 mutex_lock(&hid_open_mut
);
681 /* protecting hid->open to make sure we don't restart
682 * data acquistion due to a resumption we no longer
685 spin_lock_irq(&usbhid
->lock
);
687 spin_unlock_irq(&usbhid
->lock
);
688 hid_cancel_delayed_stuff(usbhid
);
689 usb_kill_urb(usbhid
->urbin
);
690 usbhid
->intf
->needs_remote_wakeup
= 0;
692 spin_unlock_irq(&usbhid
->lock
);
694 mutex_unlock(&hid_open_mut
);
698 * Initialize all reports
701 void usbhid_init_reports(struct hid_device
*hid
)
703 struct hid_report
*report
;
704 struct usbhid_device
*usbhid
= hid
->driver_data
;
707 list_for_each_entry(report
, &hid
->report_enum
[HID_INPUT_REPORT
].report_list
, list
)
708 usbhid_submit_report(hid
, report
, USB_DIR_IN
);
710 list_for_each_entry(report
, &hid
->report_enum
[HID_FEATURE_REPORT
].report_list
, list
)
711 usbhid_submit_report(hid
, report
, USB_DIR_IN
);
714 ret
= usbhid_wait_io(hid
);
717 if (test_bit(HID_CTRL_RUNNING
, &usbhid
->iofl
))
718 usb_kill_urb(usbhid
->urbctrl
);
719 if (test_bit(HID_OUT_RUNNING
, &usbhid
->iofl
))
720 usb_kill_urb(usbhid
->urbout
);
721 ret
= usbhid_wait_io(hid
);
725 dev_warn(&hid
->dev
, "timeout initializing reports\n");
729 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
731 static int hid_find_field_early(struct hid_device
*hid
, unsigned int page
,
732 unsigned int hid_code
, struct hid_field
**pfield
)
734 struct hid_report
*report
;
735 struct hid_field
*field
;
736 struct hid_usage
*usage
;
739 list_for_each_entry(report
, &hid
->report_enum
[HID_OUTPUT_REPORT
].report_list
, list
) {
740 for (i
= 0; i
< report
->maxfield
; i
++) {
741 field
= report
->field
[i
];
742 for (j
= 0; j
< field
->maxusage
; j
++) {
743 usage
= &field
->usage
[j
];
744 if ((usage
->hid
& HID_USAGE_PAGE
) == page
&&
745 (usage
->hid
& 0xFFFF) == hid_code
) {
755 void usbhid_set_leds(struct hid_device
*hid
)
757 struct hid_field
*field
;
760 if ((offset
= hid_find_field_early(hid
, HID_UP_LED
, 0x01, &field
)) != -1) {
761 hid_set_field(field
, offset
, 0);
762 usbhid_submit_report(hid
, field
->report
, USB_DIR_OUT
);
765 EXPORT_SYMBOL_GPL(usbhid_set_leds
);
768 * Traverse the supplied list of reports and find the longest
770 static void hid_find_max_report(struct hid_device
*hid
, unsigned int type
,
773 struct hid_report
*report
;
776 list_for_each_entry(report
, &hid
->report_enum
[type
].report_list
, list
) {
777 size
= ((report
->size
- 1) >> 3) + 1 + hid
->report_enum
[type
].numbered
;
783 static int hid_alloc_buffers(struct usb_device
*dev
, struct hid_device
*hid
)
785 struct usbhid_device
*usbhid
= hid
->driver_data
;
787 usbhid
->inbuf
= usb_alloc_coherent(dev
, usbhid
->bufsize
, GFP_KERNEL
,
789 usbhid
->outbuf
= usb_alloc_coherent(dev
, usbhid
->bufsize
, GFP_KERNEL
,
790 &usbhid
->outbuf_dma
);
791 usbhid
->cr
= kmalloc(sizeof(*usbhid
->cr
), GFP_KERNEL
);
792 usbhid
->ctrlbuf
= usb_alloc_coherent(dev
, usbhid
->bufsize
, GFP_KERNEL
,
793 &usbhid
->ctrlbuf_dma
);
794 if (!usbhid
->inbuf
|| !usbhid
->outbuf
|| !usbhid
->cr
||
801 static int usbhid_output_raw_report(struct hid_device
*hid
, __u8
*buf
, size_t count
,
802 unsigned char report_type
)
804 struct usbhid_device
*usbhid
= hid
->driver_data
;
805 struct usb_device
*dev
= hid_to_usb_dev(hid
);
806 struct usb_interface
*intf
= usbhid
->intf
;
807 struct usb_host_interface
*interface
= intf
->cur_altsetting
;
810 if (usbhid
->urbout
&& report_type
!= HID_FEATURE_REPORT
) {
812 int skipped_report_id
= 0;
815 /* Don't send the Report ID */
818 skipped_report_id
= 1;
820 ret
= usb_interrupt_msg(dev
, usbhid
->urbout
->pipe
,
821 buf
, count
, &actual_length
,
822 USB_CTRL_SET_TIMEOUT
);
823 /* return the number of bytes transferred */
826 /* count also the report id */
827 if (skipped_report_id
)
831 int skipped_report_id
= 0;
832 int report_id
= buf
[0];
834 /* Don't send the Report ID */
837 skipped_report_id
= 1;
839 ret
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
841 USB_DIR_OUT
| USB_TYPE_CLASS
| USB_RECIP_INTERFACE
,
842 ((report_type
+ 1) << 8) | report_id
,
843 interface
->desc
.bInterfaceNumber
, buf
, count
,
844 USB_CTRL_SET_TIMEOUT
);
845 /* count also the report id, if this was a numbered report. */
846 if (ret
> 0 && skipped_report_id
)
853 static void usbhid_restart_queues(struct usbhid_device
*usbhid
)
856 usbhid_restart_out_queue(usbhid
);
857 usbhid_restart_ctrl_queue(usbhid
);
860 static void __usbhid_restart_queues(struct work_struct
*work
)
862 struct usbhid_device
*usbhid
=
863 container_of(work
, struct usbhid_device
, restart_work
);
866 r
= usb_autopm_get_interface(usbhid
->intf
);
869 usb_autopm_put_interface(usbhid
->intf
);
872 static void hid_free_buffers(struct usb_device
*dev
, struct hid_device
*hid
)
874 struct usbhid_device
*usbhid
= hid
->driver_data
;
876 usb_free_coherent(dev
, usbhid
->bufsize
, usbhid
->inbuf
, usbhid
->inbuf_dma
);
877 usb_free_coherent(dev
, usbhid
->bufsize
, usbhid
->outbuf
, usbhid
->outbuf_dma
);
879 usb_free_coherent(dev
, usbhid
->bufsize
, usbhid
->ctrlbuf
, usbhid
->ctrlbuf_dma
);
882 static int usbhid_parse(struct hid_device
*hid
)
884 struct usb_interface
*intf
= to_usb_interface(hid
->dev
.parent
);
885 struct usb_host_interface
*interface
= intf
->cur_altsetting
;
886 struct usb_device
*dev
= interface_to_usbdev (intf
);
887 struct hid_descriptor
*hdesc
;
889 unsigned int rsize
= 0;
893 quirks
= usbhid_lookup_quirk(le16_to_cpu(dev
->descriptor
.idVendor
),
894 le16_to_cpu(dev
->descriptor
.idProduct
));
896 if (quirks
& HID_QUIRK_IGNORE
)
899 /* Many keyboards and mice don't like to be polled for reports,
900 * so we will always set the HID_QUIRK_NOGET flag for them. */
901 if (interface
->desc
.bInterfaceSubClass
== USB_INTERFACE_SUBCLASS_BOOT
) {
902 if (interface
->desc
.bInterfaceProtocol
== USB_INTERFACE_PROTOCOL_KEYBOARD
||
903 interface
->desc
.bInterfaceProtocol
== USB_INTERFACE_PROTOCOL_MOUSE
)
904 quirks
|= HID_QUIRK_NOGET
;
907 if (usb_get_extra_descriptor(interface
, HID_DT_HID
, &hdesc
) &&
908 (!interface
->desc
.bNumEndpoints
||
909 usb_get_extra_descriptor(&interface
->endpoint
[0], HID_DT_HID
, &hdesc
))) {
910 dbg_hid("class descriptor not present\n");
914 hid
->version
= le16_to_cpu(hdesc
->bcdHID
);
915 hid
->country
= hdesc
->bCountryCode
;
917 for (n
= 0; n
< hdesc
->bNumDescriptors
; n
++)
918 if (hdesc
->desc
[n
].bDescriptorType
== HID_DT_REPORT
)
919 rsize
= le16_to_cpu(hdesc
->desc
[n
].wDescriptorLength
);
921 if (!rsize
|| rsize
> HID_MAX_DESCRIPTOR_SIZE
) {
922 dbg_hid("weird size of report descriptor (%u)\n", rsize
);
926 if (!(rdesc
= kmalloc(rsize
, GFP_KERNEL
))) {
927 dbg_hid("couldn't allocate rdesc memory\n");
931 hid_set_idle(dev
, interface
->desc
.bInterfaceNumber
, 0, 0);
933 ret
= hid_get_class_descriptor(dev
, interface
->desc
.bInterfaceNumber
,
934 HID_DT_REPORT
, rdesc
, rsize
);
936 dbg_hid("reading report descriptor failed\n");
941 ret
= hid_parse_report(hid
, rdesc
, rsize
);
944 dbg_hid("parsing report descriptor failed\n");
948 hid
->quirks
|= quirks
;
955 static int usbhid_start(struct hid_device
*hid
)
957 struct usb_interface
*intf
= to_usb_interface(hid
->dev
.parent
);
958 struct usb_host_interface
*interface
= intf
->cur_altsetting
;
959 struct usb_device
*dev
= interface_to_usbdev(intf
);
960 struct usbhid_device
*usbhid
= hid
->driver_data
;
961 unsigned int n
, insize
= 0;
964 clear_bit(HID_DISCONNECTED
, &usbhid
->iofl
);
966 usbhid
->bufsize
= HID_MIN_BUFFER_SIZE
;
967 hid_find_max_report(hid
, HID_INPUT_REPORT
, &usbhid
->bufsize
);
968 hid_find_max_report(hid
, HID_OUTPUT_REPORT
, &usbhid
->bufsize
);
969 hid_find_max_report(hid
, HID_FEATURE_REPORT
, &usbhid
->bufsize
);
971 if (usbhid
->bufsize
> HID_MAX_BUFFER_SIZE
)
972 usbhid
->bufsize
= HID_MAX_BUFFER_SIZE
;
974 hid_find_max_report(hid
, HID_INPUT_REPORT
, &insize
);
976 if (insize
> HID_MAX_BUFFER_SIZE
)
977 insize
= HID_MAX_BUFFER_SIZE
;
979 if (hid_alloc_buffers(dev
, hid
)) {
984 for (n
= 0; n
< interface
->desc
.bNumEndpoints
; n
++) {
985 struct usb_endpoint_descriptor
*endpoint
;
989 endpoint
= &interface
->endpoint
[n
].desc
;
990 if (!usb_endpoint_xfer_int(endpoint
))
993 interval
= endpoint
->bInterval
;
995 /* Some vendors give fullspeed interval on highspeed devides */
996 if (hid
->quirks
& HID_QUIRK_FULLSPEED_INTERVAL
&&
997 dev
->speed
== USB_SPEED_HIGH
) {
998 interval
= fls(endpoint
->bInterval
*8);
999 printk(KERN_INFO
"%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
1000 hid
->name
, endpoint
->bInterval
, interval
);
1003 /* Change the polling interval of mice. */
1004 if (hid
->collection
->usage
== HID_GD_MOUSE
&& hid_mousepoll_interval
> 0)
1005 interval
= hid_mousepoll_interval
;
1008 if (usb_endpoint_dir_in(endpoint
)) {
1011 if (!(usbhid
->urbin
= usb_alloc_urb(0, GFP_KERNEL
)))
1013 pipe
= usb_rcvintpipe(dev
, endpoint
->bEndpointAddress
);
1014 usb_fill_int_urb(usbhid
->urbin
, dev
, pipe
, usbhid
->inbuf
, insize
,
1015 hid_irq_in
, hid
, interval
);
1016 usbhid
->urbin
->transfer_dma
= usbhid
->inbuf_dma
;
1017 usbhid
->urbin
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
1021 if (!(usbhid
->urbout
= usb_alloc_urb(0, GFP_KERNEL
)))
1023 pipe
= usb_sndintpipe(dev
, endpoint
->bEndpointAddress
);
1024 usb_fill_int_urb(usbhid
->urbout
, dev
, pipe
, usbhid
->outbuf
, 0,
1025 hid_irq_out
, hid
, interval
);
1026 usbhid
->urbout
->transfer_dma
= usbhid
->outbuf_dma
;
1027 usbhid
->urbout
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
1031 usbhid
->urbctrl
= usb_alloc_urb(0, GFP_KERNEL
);
1032 if (!usbhid
->urbctrl
) {
1037 usb_fill_control_urb(usbhid
->urbctrl
, dev
, 0, (void *) usbhid
->cr
,
1038 usbhid
->ctrlbuf
, 1, hid_ctrl
, hid
);
1039 usbhid
->urbctrl
->transfer_dma
= usbhid
->ctrlbuf_dma
;
1040 usbhid
->urbctrl
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
1042 if (!(hid
->quirks
& HID_QUIRK_NO_INIT_REPORTS
))
1043 usbhid_init_reports(hid
);
1045 set_bit(HID_STARTED
, &usbhid
->iofl
);
1047 /* Some keyboards don't work until their LEDs have been set.
1048 * Since BIOSes do set the LEDs, it must be safe for any device
1049 * that supports the keyboard boot protocol.
1050 * In addition, enable remote wakeup by default for all keyboard
1051 * devices supporting the boot protocol.
1053 if (interface
->desc
.bInterfaceSubClass
== USB_INTERFACE_SUBCLASS_BOOT
&&
1054 interface
->desc
.bInterfaceProtocol
==
1055 USB_INTERFACE_PROTOCOL_KEYBOARD
) {
1056 usbhid_set_leds(hid
);
1057 device_set_wakeup_enable(&dev
->dev
, 1);
1062 usb_free_urb(usbhid
->urbin
);
1063 usb_free_urb(usbhid
->urbout
);
1064 usb_free_urb(usbhid
->urbctrl
);
1065 usbhid
->urbin
= NULL
;
1066 usbhid
->urbout
= NULL
;
1067 usbhid
->urbctrl
= NULL
;
1068 hid_free_buffers(dev
, hid
);
1072 static void usbhid_stop(struct hid_device
*hid
)
1074 struct usbhid_device
*usbhid
= hid
->driver_data
;
1076 if (WARN_ON(!usbhid
))
1079 clear_bit(HID_STARTED
, &usbhid
->iofl
);
1080 spin_lock_irq(&usbhid
->lock
); /* Sync with error handler */
1081 set_bit(HID_DISCONNECTED
, &usbhid
->iofl
);
1082 spin_unlock_irq(&usbhid
->lock
);
1083 usb_kill_urb(usbhid
->urbin
);
1084 usb_kill_urb(usbhid
->urbout
);
1085 usb_kill_urb(usbhid
->urbctrl
);
1087 hid_cancel_delayed_stuff(usbhid
);
1091 usb_free_urb(usbhid
->urbin
);
1092 usb_free_urb(usbhid
->urbctrl
);
1093 usb_free_urb(usbhid
->urbout
);
1094 usbhid
->urbin
= NULL
; /* don't mess up next start */
1095 usbhid
->urbctrl
= NULL
;
1096 usbhid
->urbout
= NULL
;
1098 hid_free_buffers(hid_to_usb_dev(hid
), hid
);
1101 static int usbhid_power(struct hid_device
*hid
, int lvl
)
1106 case PM_HINT_FULLON
:
1107 r
= usbhid_get_power(hid
);
1109 case PM_HINT_NORMAL
:
1110 usbhid_put_power(hid
);
1116 static struct hid_ll_driver usb_hid_driver
= {
1117 .parse
= usbhid_parse
,
1118 .start
= usbhid_start
,
1119 .stop
= usbhid_stop
,
1120 .open
= usbhid_open
,
1121 .close
= usbhid_close
,
1122 .power
= usbhid_power
,
1123 .hidinput_input_event
= usb_hidinput_input_event
,
1126 static int usbhid_probe(struct usb_interface
*intf
, const struct usb_device_id
*id
)
1128 struct usb_host_interface
*interface
= intf
->cur_altsetting
;
1129 struct usb_device
*dev
= interface_to_usbdev(intf
);
1130 struct usbhid_device
*usbhid
;
1131 struct hid_device
*hid
;
1132 unsigned int n
, has_in
= 0;
1136 dbg_hid("HID probe called for ifnum %d\n",
1137 intf
->altsetting
->desc
.bInterfaceNumber
);
1139 for (n
= 0; n
< interface
->desc
.bNumEndpoints
; n
++)
1140 if (usb_endpoint_is_int_in(&interface
->endpoint
[n
].desc
))
1143 dev_err(&intf
->dev
, "couldn't find an input interrupt "
1148 hid
= hid_allocate_device();
1150 return PTR_ERR(hid
);
1152 usb_set_intfdata(intf
, hid
);
1153 hid
->ll_driver
= &usb_hid_driver
;
1154 hid
->hid_output_raw_report
= usbhid_output_raw_report
;
1155 hid
->ff_init
= hid_pidff_init
;
1156 #ifdef CONFIG_USB_HIDDEV
1157 hid
->hiddev_connect
= hiddev_connect
;
1158 hid
->hiddev_disconnect
= hiddev_disconnect
;
1159 hid
->hiddev_hid_event
= hiddev_hid_event
;
1160 hid
->hiddev_report_event
= hiddev_report_event
;
1162 hid
->dev
.parent
= &intf
->dev
;
1164 hid
->vendor
= le16_to_cpu(dev
->descriptor
.idVendor
);
1165 hid
->product
= le16_to_cpu(dev
->descriptor
.idProduct
);
1167 hid
->quirks
= usbhid_lookup_quirk(hid
->vendor
, hid
->product
);
1168 if (intf
->cur_altsetting
->desc
.bInterfaceProtocol
==
1169 USB_INTERFACE_PROTOCOL_MOUSE
)
1170 hid
->type
= HID_TYPE_USBMOUSE
;
1172 if (dev
->manufacturer
)
1173 strlcpy(hid
->name
, dev
->manufacturer
, sizeof(hid
->name
));
1176 if (dev
->manufacturer
)
1177 strlcat(hid
->name
, " ", sizeof(hid
->name
));
1178 strlcat(hid
->name
, dev
->product
, sizeof(hid
->name
));
1181 if (!strlen(hid
->name
))
1182 snprintf(hid
->name
, sizeof(hid
->name
), "HID %04x:%04x",
1183 le16_to_cpu(dev
->descriptor
.idVendor
),
1184 le16_to_cpu(dev
->descriptor
.idProduct
));
1186 usb_make_path(dev
, hid
->phys
, sizeof(hid
->phys
));
1187 strlcat(hid
->phys
, "/input", sizeof(hid
->phys
));
1188 len
= strlen(hid
->phys
);
1189 if (len
< sizeof(hid
->phys
) - 1)
1190 snprintf(hid
->phys
+ len
, sizeof(hid
->phys
) - len
,
1191 "%d", intf
->altsetting
[0].desc
.bInterfaceNumber
);
1193 if (usb_string(dev
, dev
->descriptor
.iSerialNumber
, hid
->uniq
, 64) <= 0)
1196 usbhid
= kzalloc(sizeof(*usbhid
), GFP_KERNEL
);
1197 if (usbhid
== NULL
) {
1202 hid
->driver_data
= usbhid
;
1204 usbhid
->intf
= intf
;
1205 usbhid
->ifnum
= interface
->desc
.bInterfaceNumber
;
1207 init_waitqueue_head(&usbhid
->wait
);
1208 INIT_WORK(&usbhid
->reset_work
, hid_reset
);
1209 INIT_WORK(&usbhid
->restart_work
, __usbhid_restart_queues
);
1210 setup_timer(&usbhid
->io_retry
, hid_retry_timeout
, (unsigned long) hid
);
1211 spin_lock_init(&usbhid
->lock
);
1213 ret
= hid_add_device(hid
);
1216 dev_err(&intf
->dev
, "can't add hid device: %d\n", ret
);
1224 hid_destroy_device(hid
);
1228 static void usbhid_disconnect(struct usb_interface
*intf
)
1230 struct hid_device
*hid
= usb_get_intfdata(intf
);
1231 struct usbhid_device
*usbhid
;
1236 usbhid
= hid
->driver_data
;
1237 hid_destroy_device(hid
);
1241 static void hid_cancel_delayed_stuff(struct usbhid_device
*usbhid
)
1243 del_timer_sync(&usbhid
->io_retry
);
1244 cancel_work_sync(&usbhid
->restart_work
);
1245 cancel_work_sync(&usbhid
->reset_work
);
1248 static void hid_cease_io(struct usbhid_device
*usbhid
)
1250 del_timer(&usbhid
->io_retry
);
1251 usb_kill_urb(usbhid
->urbin
);
1252 usb_kill_urb(usbhid
->urbctrl
);
1253 usb_kill_urb(usbhid
->urbout
);
1256 /* Treat USB reset pretty much the same as suspend/resume */
1257 static int hid_pre_reset(struct usb_interface
*intf
)
1259 struct hid_device
*hid
= usb_get_intfdata(intf
);
1260 struct usbhid_device
*usbhid
= hid
->driver_data
;
1262 spin_lock_irq(&usbhid
->lock
);
1263 set_bit(HID_RESET_PENDING
, &usbhid
->iofl
);
1264 spin_unlock_irq(&usbhid
->lock
);
1265 cancel_work_sync(&usbhid
->restart_work
);
1266 hid_cease_io(usbhid
);
1271 /* Same routine used for post_reset and reset_resume */
1272 static int hid_post_reset(struct usb_interface
*intf
)
1274 struct usb_device
*dev
= interface_to_usbdev (intf
);
1275 struct hid_device
*hid
= usb_get_intfdata(intf
);
1276 struct usbhid_device
*usbhid
= hid
->driver_data
;
1279 spin_lock_irq(&usbhid
->lock
);
1280 clear_bit(HID_RESET_PENDING
, &usbhid
->iofl
);
1281 spin_unlock_irq(&usbhid
->lock
);
1282 hid_set_idle(dev
, intf
->cur_altsetting
->desc
.bInterfaceNumber
, 0, 0);
1283 status
= hid_start_in(hid
);
1286 usbhid_restart_queues(usbhid
);
1291 int usbhid_get_power(struct hid_device
*hid
)
1293 struct usbhid_device
*usbhid
= hid
->driver_data
;
1295 return usb_autopm_get_interface(usbhid
->intf
);
1298 void usbhid_put_power(struct hid_device
*hid
)
1300 struct usbhid_device
*usbhid
= hid
->driver_data
;
1302 usb_autopm_put_interface(usbhid
->intf
);
1307 static int hid_suspend(struct usb_interface
*intf
, pm_message_t message
)
1309 struct hid_device
*hid
= usb_get_intfdata(intf
);
1310 struct usbhid_device
*usbhid
= hid
->driver_data
;
1313 if (message
.event
& PM_EVENT_AUTO
) {
1314 spin_lock_irq(&usbhid
->lock
); /* Sync with error handler */
1315 if (!test_bit(HID_RESET_PENDING
, &usbhid
->iofl
)
1316 && !test_bit(HID_CLEAR_HALT
, &usbhid
->iofl
)
1317 && !test_bit(HID_OUT_RUNNING
, &usbhid
->iofl
)
1318 && !test_bit(HID_CTRL_RUNNING
, &usbhid
->iofl
)
1319 && !test_bit(HID_KEYS_PRESSED
, &usbhid
->iofl
)
1320 && (!usbhid
->ledcount
|| ignoreled
))
1322 set_bit(HID_REPORTED_IDLE
, &usbhid
->iofl
);
1323 spin_unlock_irq(&usbhid
->lock
);
1324 if (hid
->driver
&& hid
->driver
->suspend
) {
1325 status
= hid
->driver
->suspend(hid
, message
);
1330 usbhid_mark_busy(usbhid
);
1331 spin_unlock_irq(&usbhid
->lock
);
1336 if (hid
->driver
&& hid
->driver
->suspend
) {
1337 status
= hid
->driver
->suspend(hid
, message
);
1341 spin_lock_irq(&usbhid
->lock
);
1342 set_bit(HID_REPORTED_IDLE
, &usbhid
->iofl
);
1343 spin_unlock_irq(&usbhid
->lock
);
1344 if (usbhid_wait_io(hid
) < 0)
1348 if (!ignoreled
&& (message
.event
& PM_EVENT_AUTO
)) {
1349 spin_lock_irq(&usbhid
->lock
);
1350 if (test_bit(HID_LED_ON
, &usbhid
->iofl
)) {
1351 spin_unlock_irq(&usbhid
->lock
);
1352 usbhid_mark_busy(usbhid
);
1355 spin_unlock_irq(&usbhid
->lock
);
1358 hid_cancel_delayed_stuff(usbhid
);
1359 hid_cease_io(usbhid
);
1361 if ((message
.event
& PM_EVENT_AUTO
) &&
1362 test_bit(HID_KEYS_PRESSED
, &usbhid
->iofl
)) {
1363 /* lost race against keypresses */
1364 status
= hid_start_in(hid
);
1367 usbhid_mark_busy(usbhid
);
1370 dev_dbg(&intf
->dev
, "suspend\n");
1374 static int hid_resume(struct usb_interface
*intf
)
1376 struct hid_device
*hid
= usb_get_intfdata (intf
);
1377 struct usbhid_device
*usbhid
= hid
->driver_data
;
1380 if (!test_bit(HID_STARTED
, &usbhid
->iofl
))
1383 clear_bit(HID_REPORTED_IDLE
, &usbhid
->iofl
);
1384 usbhid_mark_busy(usbhid
);
1386 if (test_bit(HID_CLEAR_HALT
, &usbhid
->iofl
) ||
1387 test_bit(HID_RESET_PENDING
, &usbhid
->iofl
))
1388 schedule_work(&usbhid
->reset_work
);
1389 usbhid
->retry_delay
= 0;
1390 status
= hid_start_in(hid
);
1393 usbhid_restart_queues(usbhid
);
1395 if (status
>= 0 && hid
->driver
&& hid
->driver
->resume
) {
1396 int ret
= hid
->driver
->resume(hid
);
1400 dev_dbg(&intf
->dev
, "resume status %d\n", status
);
1404 static int hid_reset_resume(struct usb_interface
*intf
)
1406 struct hid_device
*hid
= usb_get_intfdata(intf
);
1407 struct usbhid_device
*usbhid
= hid
->driver_data
;
1410 clear_bit(HID_REPORTED_IDLE
, &usbhid
->iofl
);
1411 status
= hid_post_reset(intf
);
1412 if (status
>= 0 && hid
->driver
&& hid
->driver
->reset_resume
) {
1413 int ret
= hid
->driver
->reset_resume(hid
);
1420 #endif /* CONFIG_PM */
1422 static const struct usb_device_id hid_usb_ids
[] = {
1423 { .match_flags
= USB_DEVICE_ID_MATCH_INT_CLASS
,
1424 .bInterfaceClass
= USB_INTERFACE_CLASS_HID
},
1425 { } /* Terminating entry */
1428 MODULE_DEVICE_TABLE (usb
, hid_usb_ids
);
1430 static struct usb_driver hid_driver
= {
1432 .probe
= usbhid_probe
,
1433 .disconnect
= usbhid_disconnect
,
1435 .suspend
= hid_suspend
,
1436 .resume
= hid_resume
,
1437 .reset_resume
= hid_reset_resume
,
1439 .pre_reset
= hid_pre_reset
,
1440 .post_reset
= hid_post_reset
,
1441 .id_table
= hid_usb_ids
,
1442 .supports_autosuspend
= 1,
1445 static const struct hid_device_id hid_usb_table
[] = {
1446 { HID_USB_DEVICE(HID_ANY_ID
, HID_ANY_ID
) },
1450 struct usb_interface
*usbhid_find_interface(int minor
)
1452 return usb_find_interface(&hid_driver
, minor
);
1455 static struct hid_driver hid_usb_driver
= {
1456 .name
= "generic-usb",
1457 .id_table
= hid_usb_table
,
1460 static int __init
hid_init(void)
1462 int retval
= -ENOMEM
;
1464 resumption_waker
= create_freezeable_workqueue("usbhid_resumer");
1465 if (!resumption_waker
)
1467 retval
= hid_register_driver(&hid_usb_driver
);
1469 goto hid_register_fail
;
1470 retval
= usbhid_quirks_init(quirks_param
);
1472 goto usbhid_quirks_init_fail
;
1473 retval
= usb_register(&hid_driver
);
1475 goto usb_register_fail
;
1476 printk(KERN_INFO KBUILD_MODNAME
": " DRIVER_DESC
"\n");
1480 usbhid_quirks_exit();
1481 usbhid_quirks_init_fail
:
1482 hid_unregister_driver(&hid_usb_driver
);
1484 destroy_workqueue(resumption_waker
);
1489 static void __exit
hid_exit(void)
1491 usb_deregister(&hid_driver
);
1492 usbhid_quirks_exit();
1493 hid_unregister_driver(&hid_usb_driver
);
1494 destroy_workqueue(resumption_waker
);
1497 module_init(hid_init
);
1498 module_exit(hid_exit
);
1500 MODULE_AUTHOR("Andreas Gal");
1501 MODULE_AUTHOR("Vojtech Pavlik");
1502 MODULE_AUTHOR("Jiri Kosina");
1503 MODULE_DESCRIPTION(DRIVER_DESC
);
1504 MODULE_LICENSE(DRIVER_LICENSE
);