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Merge tag 'io_uring-5.7-2020-05-22' of git://git.kernel.dk/linux-block
[thirdparty/linux.git] / drivers / hid / usbhid / hid-core.c
CommitLineData
2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4
LT
2/*
3 * USB HID support for Linux
4 *
5 * Copyright (c) 1999 Andreas Gal
bf0964dc
MH
6 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
7 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
0361a28d 8 * Copyright (c) 2007-2008 Oliver Neukum
7d39e849 9 * Copyright (c) 2006-2010 Jiri Kosina
1da177e4
LT
10 */
11
12/*
1da177e4
LT
13 */
14
15#include <linux/module.h>
16#include <linux/slab.h>
17#include <linux/init.h>
18#include <linux/kernel.h>
1da177e4
LT
19#include <linux/list.h>
20#include <linux/mm.h>
3d5afd32 21#include <linux/mutex.h>
1da177e4
LT
22#include <linux/spinlock.h>
23#include <asm/unaligned.h>
24#include <asm/byteorder.h>
25#include <linux/input.h>
26#include <linux/wait.h>
0361a28d 27#include <linux/workqueue.h>
dc3c78e4 28#include <linux/string.h>
1da177e4 29
1da177e4
LT
30#include <linux/usb.h>
31
dde5845a 32#include <linux/hid.h>
1da177e4 33#include <linux/hiddev.h>
c080d89a 34#include <linux/hid-debug.h>
86166b7b 35#include <linux/hidraw.h>
4916b3a5 36#include "usbhid.h"
1da177e4
LT
37
38/*
39 * Version Information
40 */
41
1da177e4 42#define DRIVER_DESC "USB HID core driver"
1da177e4 43
1da177e4
LT
44/*
45 * Module parameters.
46 */
47
48static unsigned int hid_mousepoll_interval;
49module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
50MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
51
933bfe4d
TJ
52static unsigned int hid_jspoll_interval;
53module_param_named(jspoll, hid_jspoll_interval, uint, 0644);
54MODULE_PARM_DESC(jspoll, "Polling interval of joysticks");
55
2ddc8e2d
FA
56static unsigned int hid_kbpoll_interval;
57module_param_named(kbpoll, hid_kbpoll_interval, uint, 0644);
58MODULE_PARM_DESC(kbpoll, "Polling interval of keyboards");
59
0361a28d
ON
60static unsigned int ignoreled;
61module_param_named(ignoreled, ignoreled, uint, 0644);
62MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds");
63
876b9276 64/* Quirks specified at module load time */
81ba9926 65static char *quirks_param[MAX_USBHID_BOOT_QUIRKS];
876b9276
PW
66module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
67MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
68 " quirks=vendorID:productID:quirks"
69 " where vendorID, productID, and quirks are all in"
70 " 0x-prefixed hex");
1da177e4 71/*
48b4554a 72 * Input submission and I/O error handler.
1da177e4 73 */
48b4554a 74static void hid_io_error(struct hid_device *hid);
0361a28d
ON
75static int hid_submit_out(struct hid_device *hid);
76static int hid_submit_ctrl(struct hid_device *hid);
77static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid);
48b4554a
JK
78
79/* Start up the input URB */
80static int hid_start_in(struct hid_device *hid)
1da177e4 81{
1da177e4 82 unsigned long flags;
48b4554a
JK
83 int rc = 0;
84 struct usbhid_device *usbhid = hid->driver_data;
1da177e4 85
0361a28d 86 spin_lock_irqsave(&usbhid->lock, flags);
28cbc863
DT
87 if (test_bit(HID_IN_POLLING, &usbhid->iofl) &&
88 !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
89 !test_bit(HID_SUSPENDED, &usbhid->iofl) &&
90 !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
48b4554a 91 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
a8c52b66 92 if (rc != 0) {
48b4554a 93 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
a8c52b66
ON
94 if (rc == -ENOSPC)
95 set_bit(HID_NO_BANDWIDTH, &usbhid->iofl);
96 } else {
97 clear_bit(HID_NO_BANDWIDTH, &usbhid->iofl);
98 }
1da177e4 99 }
0361a28d 100 spin_unlock_irqrestore(&usbhid->lock, flags);
48b4554a 101 return rc;
1da177e4
LT
102}
103
48b4554a 104/* I/O retry timer routine */
0ee32774 105static void hid_retry_timeout(struct timer_list *t)
1da177e4 106{
0ee32774
KC
107 struct usbhid_device *usbhid = from_timer(usbhid, t, io_retry);
108 struct hid_device *hid = usbhid->hid;
1da177e4 109
48b4554a
JK
110 dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
111 if (hid_start_in(hid))
112 hid_io_error(hid);
1da177e4
LT
113}
114
48b4554a
JK
115/* Workqueue routine to reset the device or clear a halt */
116static void hid_reset(struct work_struct *work)
1da177e4 117{
48b4554a
JK
118 struct usbhid_device *usbhid =
119 container_of(work, struct usbhid_device, reset_work);
120 struct hid_device *hid = usbhid->hid;
8f507ef5 121 int rc;
1da177e4 122
48b4554a
JK
123 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
124 dev_dbg(&usbhid->intf->dev, "clear halt\n");
125 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
126 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
011b15df 127 if (rc == 0) {
8f507ef5
AS
128 hid_start_in(hid);
129 } else {
130 dev_dbg(&usbhid->intf->dev,
131 "clear-halt failed: %d\n", rc);
132 set_bit(HID_RESET_PENDING, &usbhid->iofl);
1da177e4 133 }
1da177e4
LT
134 }
135
8f507ef5
AS
136 if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
137 dev_dbg(&usbhid->intf->dev, "resetting device\n");
138 usb_queue_reset_device(usbhid->intf);
1da177e4 139 }
1da177e4
LT
140}
141
48b4554a
JK
142/* Main I/O error handler */
143static void hid_io_error(struct hid_device *hid)
dde5845a 144{
48b4554a
JK
145 unsigned long flags;
146 struct usbhid_device *usbhid = hid->driver_data;
dde5845a 147
0361a28d 148 spin_lock_irqsave(&usbhid->lock, flags);
dde5845a 149
48b4554a 150 /* Stop when disconnected */
69626f23 151 if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
48b4554a 152 goto done;
dde5845a 153
5e2a55f2
AS
154 /* If it has been a while since the last error, we'll assume
155 * this a brand new error and reset the retry timeout. */
156 if (time_after(jiffies, usbhid->stop_retry + HZ/2))
157 usbhid->retry_delay = 0;
158
48b4554a
JK
159 /* When an error occurs, retry at increasing intervals */
160 if (usbhid->retry_delay == 0) {
161 usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */
162 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
163 } else if (usbhid->retry_delay < 100)
164 usbhid->retry_delay *= 2;
dde5845a 165
48b4554a 166 if (time_after(jiffies, usbhid->stop_retry)) {
4916b3a5 167
a8c52b66 168 /* Retries failed, so do a port reset unless we lack bandwidth*/
3af4e5a9 169 if (!test_bit(HID_NO_BANDWIDTH, &usbhid->iofl)
a8c52b66
ON
170 && !test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
171
48b4554a
JK
172 schedule_work(&usbhid->reset_work);
173 goto done;
174 }
1da177e4
LT
175 }
176
48b4554a
JK
177 mod_timer(&usbhid->io_retry,
178 jiffies + msecs_to_jiffies(usbhid->retry_delay));
179done:
0361a28d
ON
180 spin_unlock_irqrestore(&usbhid->lock, flags);
181}
182
183static void usbhid_mark_busy(struct usbhid_device *usbhid)
184{
185 struct usb_interface *intf = usbhid->intf;
186
187 usb_mark_last_busy(interface_to_usbdev(intf));
188}
189
190static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
191{
192 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
193 int kicked;
f0befcd6 194 int r;
0361a28d 195
d4150c8f
AS
196 if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) ||
197 test_bit(HID_SUSPENDED, &usbhid->iofl))
0361a28d
ON
198 return 0;
199
200 if ((kicked = (usbhid->outhead != usbhid->outtail))) {
6cc203d7 201 hid_dbg(hid, "Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
f0befcd6 202
01a7c984 203 /* Try to wake up from autosuspend... */
f0befcd6
DK
204 r = usb_autopm_get_interface_async(usbhid->intf);
205 if (r < 0)
206 return r;
01a7c984
AS
207
208 /*
209 * If still suspended, don't submit. Submission will
210 * occur if/when resume drains the queue.
211 */
f2b5264d 212 if (test_bit(HID_SUSPENDED, &usbhid->iofl)) {
01a7c984
AS
213 usb_autopm_put_interface_no_suspend(usbhid->intf);
214 return r;
215 }
216
f0befcd6
DK
217 /* Asynchronously flush queue. */
218 set_bit(HID_OUT_RUNNING, &usbhid->iofl);
0361a28d
ON
219 if (hid_submit_out(hid)) {
220 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
f0befcd6 221 usb_autopm_put_interface_async(usbhid->intf);
0361a28d 222 }
f0befcd6 223 wake_up(&usbhid->wait);
0361a28d
ON
224 }
225 return kicked;
226}
227
228static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
229{
230 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
231 int kicked;
f0befcd6 232 int r;
0361a28d
ON
233
234 WARN_ON(hid == NULL);
d4150c8f
AS
235 if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) ||
236 test_bit(HID_SUSPENDED, &usbhid->iofl))
0361a28d
ON
237 return 0;
238
239 if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
6cc203d7 240 hid_dbg(hid, "Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
f0befcd6 241
01a7c984 242 /* Try to wake up from autosuspend... */
f0befcd6
DK
243 r = usb_autopm_get_interface_async(usbhid->intf);
244 if (r < 0)
245 return r;
01a7c984
AS
246
247 /*
248 * If still suspended, don't submit. Submission will
249 * occur if/when resume drains the queue.
250 */
f2b5264d 251 if (test_bit(HID_SUSPENDED, &usbhid->iofl)) {
01a7c984
AS
252 usb_autopm_put_interface_no_suspend(usbhid->intf);
253 return r;
254 }
255
f0befcd6
DK
256 /* Asynchronously flush queue. */
257 set_bit(HID_CTRL_RUNNING, &usbhid->iofl);
0361a28d
ON
258 if (hid_submit_ctrl(hid)) {
259 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
f0befcd6 260 usb_autopm_put_interface_async(usbhid->intf);
0361a28d 261 }
f0befcd6 262 wake_up(&usbhid->wait);
0361a28d
ON
263 }
264 return kicked;
1da177e4
LT
265}
266
48b4554a
JK
267/*
268 * Input interrupt completion handler.
269 */
854561b0 270
48b4554a 271static void hid_irq_in(struct urb *urb)
1da177e4 272{
48b4554a 273 struct hid_device *hid = urb->context;
28cbc863 274 struct usbhid_device *usbhid = hid->driver_data;
48b4554a 275 int status;
1da177e4 276
48b4554a 277 switch (urb->status) {
880d29f1
JS
278 case 0: /* success */
279 usbhid->retry_delay = 0;
28cbc863 280 if (!test_bit(HID_OPENED, &usbhid->iofl))
0b750b3b 281 break;
cc8a9d79 282 usbhid_mark_busy(usbhid);
b905811a
BT
283 if (!test_bit(HID_RESUME_RUNNING, &usbhid->iofl)) {
284 hid_input_report(urb->context, HID_INPUT_REPORT,
285 urb->transfer_buffer,
286 urb->actual_length, 1);
287 /*
288 * autosuspend refused while keys are pressed
289 * because most keyboards don't wake up when
290 * a key is released
291 */
292 if (hid_check_keys_pressed(hid))
293 set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
294 else
295 clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
296 }
880d29f1
JS
297 break;
298 case -EPIPE: /* stall */
0361a28d 299 usbhid_mark_busy(usbhid);
880d29f1
JS
300 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
301 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
302 schedule_work(&usbhid->reset_work);
303 return;
304 case -ECONNRESET: /* unlink */
305 case -ENOENT:
306 case -ESHUTDOWN: /* unplug */
307 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
308 return;
309 case -EILSEQ: /* protocol error or unplug */
310 case -EPROTO: /* protocol error or unplug */
311 case -ETIME: /* protocol error or unplug */
312 case -ETIMEDOUT: /* Should never happen, but... */
0361a28d 313 usbhid_mark_busy(usbhid);
880d29f1
JS
314 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
315 hid_io_error(hid);
316 return;
317 default: /* error */
4291ee30
JP
318 hid_warn(urb->dev, "input irq status %d received\n",
319 urb->status);
48b4554a 320 }
1da177e4 321
48b4554a
JK
322 status = usb_submit_urb(urb, GFP_ATOMIC);
323 if (status) {
324 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
325 if (status != -EPERM) {
4291ee30
JP
326 hid_err(hid, "can't resubmit intr, %s-%s/input%d, status %d\n",
327 hid_to_usb_dev(hid)->bus->bus_name,
328 hid_to_usb_dev(hid)->devpath,
329 usbhid->ifnum, status);
48b4554a
JK
330 hid_io_error(hid);
331 }
332 }
1da177e4
LT
333}
334
48b4554a 335static int hid_submit_out(struct hid_device *hid)
1da177e4 336{
48b4554a 337 struct hid_report *report;
f129ea6d 338 char *raw_report;
4916b3a5 339 struct usbhid_device *usbhid = hid->driver_data;
68229689 340 int r;
4916b3a5 341
f129ea6d
AH
342 report = usbhid->out[usbhid->outtail].report;
343 raw_report = usbhid->out[usbhid->outtail].raw_report;
1da177e4 344
dabb05c6 345 usbhid->urbout->transfer_buffer_length = hid_report_len(report);
f0befcd6 346 usbhid->urbout->dev = hid_to_usb_dev(hid);
668160e5
AS
347 if (raw_report) {
348 memcpy(usbhid->outbuf, raw_report,
349 usbhid->urbout->transfer_buffer_length);
350 kfree(raw_report);
351 usbhid->out[usbhid->outtail].raw_report = NULL;
352 }
1d3e2023 353
f0befcd6 354 dbg_hid("submitting out urb\n");
d57cdcff 355
f0befcd6
DK
356 r = usb_submit_urb(usbhid->urbout, GFP_ATOMIC);
357 if (r < 0) {
358 hid_err(hid, "usb_submit_urb(out) failed: %d\n", r);
359 return r;
48b4554a 360 }
f0befcd6 361 usbhid->last_out = jiffies;
48b4554a
JK
362 return 0;
363}
364
365static int hid_submit_ctrl(struct hid_device *hid)
1da177e4
LT
366{
367 struct hid_report *report;
48b4554a 368 unsigned char dir;
f129ea6d 369 char *raw_report;
68229689 370 int len, r;
4916b3a5 371 struct usbhid_device *usbhid = hid->driver_data;
1da177e4 372
48b4554a 373 report = usbhid->ctrl[usbhid->ctrltail].report;
f129ea6d 374 raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
48b4554a 375 dir = usbhid->ctrl[usbhid->ctrltail].dir;
1da177e4 376
f0befcd6
DK
377 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
378 if (dir == USB_DIR_OUT) {
379 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
380 usbhid->urbctrl->transfer_buffer_length = len;
668160e5
AS
381 if (raw_report) {
382 memcpy(usbhid->ctrlbuf, raw_report, len);
383 kfree(raw_report);
384 usbhid->ctrl[usbhid->ctrltail].raw_report = NULL;
385 }
f0befcd6
DK
386 } else {
387 int maxpacket, padlen;
388
389 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
390 maxpacket = usb_maxpacket(hid_to_usb_dev(hid),
391 usbhid->urbctrl->pipe, 0);
392 if (maxpacket > 0) {
393 padlen = DIV_ROUND_UP(len, maxpacket);
394 padlen *= maxpacket;
395 if (padlen > usbhid->bufsize)
396 padlen = usbhid->bufsize;
397 } else
398 padlen = 0;
399 usbhid->urbctrl->transfer_buffer_length = padlen;
48b4554a 400 }
f0befcd6
DK
401 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
402
403 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
404 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT :
405 HID_REQ_GET_REPORT;
406 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) |
407 report->id);
408 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
409 usbhid->cr->wLength = cpu_to_le16(len);
410
411 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
412 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" :
413 "Get_Report",
414 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
415
416 r = usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC);
417 if (r < 0) {
418 hid_err(hid, "usb_submit_urb(ctrl) failed: %d\n", r);
419 return r;
420 }
421 usbhid->last_ctrl = jiffies;
48b4554a
JK
422 return 0;
423}
1da177e4 424
48b4554a
JK
425/*
426 * Output interrupt completion handler.
427 */
1da177e4 428
48b4554a
JK
429static void hid_irq_out(struct urb *urb)
430{
431 struct hid_device *hid = urb->context;
432 struct usbhid_device *usbhid = hid->driver_data;
433 unsigned long flags;
434 int unplug = 0;
1da177e4 435
48b4554a 436 switch (urb->status) {
880d29f1
JS
437 case 0: /* success */
438 break;
439 case -ESHUTDOWN: /* unplug */
440 unplug = 1;
441 case -EILSEQ: /* protocol error or unplug */
442 case -EPROTO: /* protocol error or unplug */
443 case -ECONNRESET: /* unlink */
444 case -ENOENT:
445 break;
446 default: /* error */
4291ee30
JP
447 hid_warn(urb->dev, "output irq status %d received\n",
448 urb->status);
48b4554a 449 }
1da177e4 450
0361a28d 451 spin_lock_irqsave(&usbhid->lock, flags);
1da177e4 452
93101af3 453 if (unplug) {
48b4554a 454 usbhid->outtail = usbhid->outhead;
93101af3 455 } else {
48b4554a 456 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
1da177e4 457
93101af3
AS
458 if (usbhid->outhead != usbhid->outtail &&
459 hid_submit_out(hid) == 0) {
460 /* Successfully submitted next urb in queue */
461 spin_unlock_irqrestore(&usbhid->lock, flags);
462 return;
463 }
48b4554a 464 }
1da177e4 465
48b4554a 466 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
0361a28d 467 spin_unlock_irqrestore(&usbhid->lock, flags);
68229689 468 usb_autopm_put_interface_async(usbhid->intf);
1d1bdd20 469 wake_up(&usbhid->wait);
48b4554a 470}
6345fdfd 471
48b4554a
JK
472/*
473 * Control pipe completion handler.
474 */
1da177e4 475
48b4554a
JK
476static void hid_ctrl(struct urb *urb)
477{
478 struct hid_device *hid = urb->context;
479 struct usbhid_device *usbhid = hid->driver_data;
f49255e0 480 unsigned long flags;
0361a28d 481 int unplug = 0, status = urb->status;
1da177e4 482
0361a28d 483 switch (status) {
880d29f1
JS
484 case 0: /* success */
485 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
486 hid_input_report(urb->context,
487 usbhid->ctrl[usbhid->ctrltail].report->type,
488 urb->transfer_buffer, urb->actual_length, 0);
489 break;
490 case -ESHUTDOWN: /* unplug */
491 unplug = 1;
492 case -EILSEQ: /* protocol error or unplug */
493 case -EPROTO: /* protocol error or unplug */
494 case -ECONNRESET: /* unlink */
495 case -ENOENT:
496 case -EPIPE: /* report not available */
497 break;
498 default: /* error */
4291ee30 499 hid_warn(urb->dev, "ctrl urb status %d received\n", status);
48b4554a 500 }
1da177e4 501
f49255e0 502 spin_lock_irqsave(&usbhid->lock, flags);
e470127e 503
93101af3 504 if (unplug) {
48b4554a 505 usbhid->ctrltail = usbhid->ctrlhead;
93101af3 506 } else {
48b4554a 507 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
1da177e4 508
93101af3
AS
509 if (usbhid->ctrlhead != usbhid->ctrltail &&
510 hid_submit_ctrl(hid) == 0) {
511 /* Successfully submitted next urb in queue */
f49255e0 512 spin_unlock_irqrestore(&usbhid->lock, flags);
93101af3
AS
513 return;
514 }
48b4554a 515 }
1da177e4 516
48b4554a 517 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
f49255e0 518 spin_unlock_irqrestore(&usbhid->lock, flags);
68229689 519 usb_autopm_put_interface_async(usbhid->intf);
1d1bdd20 520 wake_up(&usbhid->wait);
48b4554a 521}
1da177e4 522
52cfc61b
HS
523static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
524 unsigned char dir)
48b4554a
JK
525{
526 int head;
48b4554a 527 struct usbhid_device *usbhid = hid->driver_data;
1da177e4 528
46df9ded
RA
529 if (((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN) ||
530 test_bit(HID_DISCONNECTED, &usbhid->iofl))
48b4554a 531 return;
b857c651 532
48b4554a 533 if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
48b4554a 534 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
4291ee30 535 hid_warn(hid, "output queue full\n");
48b4554a
JK
536 return;
537 }
1da177e4 538
27ce4050 539 usbhid->out[usbhid->outhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC);
f129ea6d 540 if (!usbhid->out[usbhid->outhead].raw_report) {
4291ee30 541 hid_warn(hid, "output queueing failed\n");
f129ea6d
AH
542 return;
543 }
544 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
545 usbhid->out[usbhid->outhead].report = report;
48b4554a 546 usbhid->outhead = head;
4871d3be 547
01a7c984
AS
548 /* If the queue isn't running, restart it */
549 if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl)) {
550 usbhid_restart_out_queue(usbhid);
f0befcd6 551
01a7c984
AS
552 /* Otherwise see if an earlier request has timed out */
553 } else if (time_after(jiffies, usbhid->last_out + HZ * 5)) {
554
555 /* Prevent autosuspend following the unlink */
556 usb_autopm_get_interface_no_resume(usbhid->intf);
f0befcd6 557
858155fb 558 /*
01a7c984
AS
559 * Prevent resubmission in case the URB completes
560 * before we can unlink it. We don't want to cancel
561 * the wrong transfer!
858155fb 562 */
01a7c984
AS
563 usb_block_urb(usbhid->urbout);
564
565 /* Drop lock to avoid deadlock if the callback runs */
566 spin_unlock(&usbhid->lock);
567
568 usb_unlink_urb(usbhid->urbout);
569 spin_lock(&usbhid->lock);
570 usb_unblock_urb(usbhid->urbout);
571
572 /* Unlink might have stopped the queue */
573 if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl))
574 usbhid_restart_out_queue(usbhid);
575
576 /* Now we can allow autosuspend again */
577 usb_autopm_put_interface_async(usbhid->intf);
858155fb 578 }
48b4554a
JK
579 return;
580 }
1da177e4 581
48b4554a 582 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
4291ee30 583 hid_warn(hid, "control queue full\n");
48b4554a
JK
584 return;
585 }
8fd80133 586
f129ea6d 587 if (dir == USB_DIR_OUT) {
27ce4050 588 usbhid->ctrl[usbhid->ctrlhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC);
f129ea6d 589 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
4291ee30 590 hid_warn(hid, "control queueing failed\n");
f129ea6d
AH
591 return;
592 }
593 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
594 }
48b4554a
JK
595 usbhid->ctrl[usbhid->ctrlhead].report = report;
596 usbhid->ctrl[usbhid->ctrlhead].dir = dir;
597 usbhid->ctrlhead = head;
8fd80133 598
01a7c984
AS
599 /* If the queue isn't running, restart it */
600 if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) {
601 usbhid_restart_ctrl_queue(usbhid);
f0befcd6 602
01a7c984
AS
603 /* Otherwise see if an earlier request has timed out */
604 } else if (time_after(jiffies, usbhid->last_ctrl + HZ * 5)) {
605
606 /* Prevent autosuspend following the unlink */
607 usb_autopm_get_interface_no_resume(usbhid->intf);
f0befcd6 608
858155fb 609 /*
01a7c984
AS
610 * Prevent resubmission in case the URB completes
611 * before we can unlink it. We don't want to cancel
612 * the wrong transfer!
858155fb 613 */
01a7c984
AS
614 usb_block_urb(usbhid->urbctrl);
615
616 /* Drop lock to avoid deadlock if the callback runs */
617 spin_unlock(&usbhid->lock);
618
619 usb_unlink_urb(usbhid->urbctrl);
620 spin_lock(&usbhid->lock);
621 usb_unblock_urb(usbhid->urbctrl);
622
623 /* Unlink might have stopped the queue */
624 if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
625 usbhid_restart_ctrl_queue(usbhid);
626
627 /* Now we can allow autosuspend again */
628 usb_autopm_put_interface_async(usbhid->intf);
858155fb 629 }
0361a28d 630}
931e24b9 631
d8814272 632static void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
0361a28d
ON
633{
634 struct usbhid_device *usbhid = hid->driver_data;
635 unsigned long flags;
931e24b9 636
0361a28d
ON
637 spin_lock_irqsave(&usbhid->lock, flags);
638 __usbhid_submit_report(hid, report, dir);
639 spin_unlock_irqrestore(&usbhid->lock, flags);
48b4554a 640}
23b0d968 641
b7966a4d 642static int usbhid_wait_io(struct hid_device *hid)
48b4554a
JK
643{
644 struct usbhid_device *usbhid = hid->driver_data;
25914662 645
1d1bdd20
JS
646 if (!wait_event_timeout(usbhid->wait,
647 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
648 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
48b4554a 649 10*HZ)) {
58037eb9 650 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
48b4554a
JK
651 return -1;
652 }
1da177e4 653
48b4554a
JK
654 return 0;
655}
53880546 656
48b4554a
JK
657static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
658{
659 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
660 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
661 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
662}
1da177e4 663
48b4554a
JK
664static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
665 unsigned char type, void *buf, int size)
666{
667 int result, retries = 4;
1da177e4 668
48b4554a 669 memset(buf, 0, size);
1da177e4 670
48b4554a
JK
671 do {
672 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
673 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
674 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
675 retries--;
676 } while (result < size && retries);
677 return result;
678}
940824b0 679
d36b7d4c 680static int usbhid_open(struct hid_device *hid)
48b4554a 681{
933e3187 682 struct usbhid_device *usbhid = hid->driver_data;
e399396a 683 int res;
b905811a 684
0ed08fad
AS
685 mutex_lock(&usbhid->mutex);
686
cf601774
DT
687 set_bit(HID_OPENED, &usbhid->iofl);
688
0ed08fad
AS
689 if (hid->quirks & HID_QUIRK_ALWAYS_POLL) {
690 res = 0;
691 goto Done;
692 }
e399396a
DT
693
694 res = usb_autopm_get_interface(usbhid->intf);
695 /* the device must be awake to reliably request remote wakeup */
cf601774
DT
696 if (res < 0) {
697 clear_bit(HID_OPENED, &usbhid->iofl);
0ed08fad
AS
698 res = -EIO;
699 goto Done;
cf601774 700 }
e399396a
DT
701
702 usbhid->intf->needs_remote_wakeup = 1;
703
704 set_bit(HID_RESUME_RUNNING, &usbhid->iofl);
e399396a
DT
705 set_bit(HID_IN_POLLING, &usbhid->iofl);
706
707 res = hid_start_in(hid);
708 if (res) {
709 if (res != -ENOSPC) {
710 hid_io_error(hid);
711 res = 0;
712 } else {
713 /* no use opening if resources are insufficient */
714 res = -EBUSY;
715 clear_bit(HID_OPENED, &usbhid->iofl);
716 clear_bit(HID_IN_POLLING, &usbhid->iofl);
717 usbhid->intf->needs_remote_wakeup = 0;
718 }
933e3187 719 }
e399396a
DT
720
721 usb_autopm_put_interface(usbhid->intf);
722
723 /*
724 * In case events are generated while nobody was listening,
725 * some are released when the device is re-opened.
726 * Wait 50 msec for the queue to empty before allowing events
727 * to go through hid.
728 */
729 if (res == 0)
730 msleep(50);
731
732 clear_bit(HID_RESUME_RUNNING, &usbhid->iofl);
0ed08fad
AS
733
734 Done:
735 mutex_unlock(&usbhid->mutex);
a8c52b66 736 return res;
48b4554a 737}
a417a21e 738
d36b7d4c 739static void usbhid_close(struct hid_device *hid)
48b4554a
JK
740{
741 struct usbhid_device *usbhid = hid->driver_data;
eab9edd2 742
0ed08fad
AS
743 mutex_lock(&usbhid->mutex);
744
e399396a
DT
745 /*
746 * Make sure we don't restart data acquisition due to
747 * a resumption we no longer care about by avoiding racing
748 * with hid_start_in().
0361a28d
ON
749 */
750 spin_lock_irq(&usbhid->lock);
e399396a 751 clear_bit(HID_OPENED, &usbhid->iofl);
cf601774
DT
752 if (!(hid->quirks & HID_QUIRK_ALWAYS_POLL))
753 clear_bit(HID_IN_POLLING, &usbhid->iofl);
e399396a
DT
754 spin_unlock_irq(&usbhid->lock);
755
0ed08fad
AS
756 if (!(hid->quirks & HID_QUIRK_ALWAYS_POLL)) {
757 hid_cancel_delayed_stuff(usbhid);
758 usb_kill_urb(usbhid->urbin);
759 usbhid->intf->needs_remote_wakeup = 0;
760 }
cf601774 761
0ed08fad 762 mutex_unlock(&usbhid->mutex);
48b4554a 763}
1d3e2023 764
48b4554a
JK
765/*
766 * Initialize all reports
767 */
41ad5fba 768
48b4554a
JK
769void usbhid_init_reports(struct hid_device *hid)
770{
771 struct hid_report *report;
772 struct usbhid_device *usbhid = hid->driver_data;
595e9276 773 struct hid_report_enum *report_enum;
48b4554a 774 int err, ret;
41ad5fba 775
9143059f
BT
776 report_enum = &hid->report_enum[HID_INPUT_REPORT];
777 list_for_each_entry(report, &report_enum->report_list, list)
778 usbhid_submit_report(hid, report, USB_DIR_IN);
5556feae 779
595e9276
BT
780 report_enum = &hid->report_enum[HID_FEATURE_REPORT];
781 list_for_each_entry(report, &report_enum->report_list, list)
48b4554a 782 usbhid_submit_report(hid, report, USB_DIR_IN);
4a1a4d8b 783
48b4554a
JK
784 err = 0;
785 ret = usbhid_wait_io(hid);
786 while (ret) {
787 err |= ret;
788 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
789 usb_kill_urb(usbhid->urbctrl);
790 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
791 usb_kill_urb(usbhid->urbout);
792 ret = usbhid_wait_io(hid);
793 }
3f9b4076 794
48b4554a 795 if (err)
4291ee30 796 hid_warn(hid, "timeout initializing reports\n");
48b4554a 797}
1da177e4 798
713c8aad
PZ
799/*
800 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
801 */
802static int hid_find_field_early(struct hid_device *hid, unsigned int page,
803 unsigned int hid_code, struct hid_field **pfield)
804{
805 struct hid_report *report;
806 struct hid_field *field;
807 struct hid_usage *usage;
808 int i, j;
809
810 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
811 for (i = 0; i < report->maxfield; i++) {
812 field = report->field[i];
813 for (j = 0; j < field->maxusage; j++) {
814 usage = &field->usage[j];
815 if ((usage->hid & HID_USAGE_PAGE) == page &&
816 (usage->hid & 0xFFFF) == hid_code) {
817 *pfield = field;
818 return j;
819 }
820 }
821 }
822 }
823 return -1;
824}
825
ddf64a3c 826static void usbhid_set_leds(struct hid_device *hid)
713c8aad
PZ
827{
828 struct hid_field *field;
829 int offset;
830
831 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
832 hid_set_field(field, offset, 0);
833 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
834 }
835}
836
bf0964dc
MH
837/*
838 * Traverse the supplied list of reports and find the longest
839 */
282bfd4c
JS
840static void hid_find_max_report(struct hid_device *hid, unsigned int type,
841 unsigned int *max)
bf0964dc
MH
842{
843 struct hid_report *report;
282bfd4c 844 unsigned int size;
bf0964dc
MH
845
846 list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
efc7ce18 847 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
bf0964dc
MH
848 if (*max < size)
849 *max = size;
850 }
851}
852
1da177e4
LT
853static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
854{
4916b3a5
JK
855 struct usbhid_device *usbhid = hid->driver_data;
856
997ea58e 857 usbhid->inbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
898089d0 858 &usbhid->inbuf_dma);
997ea58e 859 usbhid->outbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
898089d0 860 &usbhid->outbuf_dma);
0ede76fc 861 usbhid->cr = kmalloc(sizeof(*usbhid->cr), GFP_KERNEL);
997ea58e 862 usbhid->ctrlbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
898089d0
JS
863 &usbhid->ctrlbuf_dma);
864 if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
865 !usbhid->ctrlbuf)
1da177e4
LT
866 return -1;
867
868 return 0;
869}
870
b4dbde9d
AO
871static int usbhid_get_raw_report(struct hid_device *hid,
872 unsigned char report_number, __u8 *buf, size_t count,
873 unsigned char report_type)
874{
875 struct usbhid_device *usbhid = hid->driver_data;
876 struct usb_device *dev = hid_to_usb_dev(hid);
877 struct usb_interface *intf = usbhid->intf;
878 struct usb_host_interface *interface = intf->cur_altsetting;
879 int skipped_report_id = 0;
880 int ret;
881
882 /* Byte 0 is the report number. Report data starts at byte 1.*/
883 buf[0] = report_number;
884 if (report_number == 0x0) {
885 /* Offset the return buffer by 1, so that the report ID
886 will remain in byte 0. */
887 buf++;
888 count--;
889 skipped_report_id = 1;
890 }
891 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
892 HID_REQ_GET_REPORT,
893 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
894 ((report_type + 1) << 8) | report_number,
895 interface->desc.bInterfaceNumber, buf, count,
896 USB_CTRL_SET_TIMEOUT);
897
898 /* count also the report id */
899 if (ret > 0 && skipped_report_id)
900 ret++;
901
902 return ret;
903}
904
975a6832
FP
905static int usbhid_set_raw_report(struct hid_device *hid, unsigned int reportnum,
906 __u8 *buf, size_t count, unsigned char rtype)
907{
908 struct usbhid_device *usbhid = hid->driver_data;
909 struct usb_device *dev = hid_to_usb_dev(hid);
910 struct usb_interface *intf = usbhid->intf;
911 struct usb_host_interface *interface = intf->cur_altsetting;
912 int ret, skipped_report_id = 0;
913
914 /* Byte 0 is the report number. Report data starts at byte 1.*/
e534a935
BT
915 if ((rtype == HID_OUTPUT_REPORT) &&
916 (hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORT_ID))
917 buf[0] = 0;
918 else
919 buf[0] = reportnum;
920
975a6832
FP
921 if (buf[0] == 0x0) {
922 /* Don't send the Report ID */
923 buf++;
924 count--;
925 skipped_report_id = 1;
926 }
927
928 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
929 HID_REQ_SET_REPORT,
930 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
931 ((rtype + 1) << 8) | reportnum,
932 interface->desc.bInterfaceNumber, buf, count,
933 USB_CTRL_SET_TIMEOUT);
934 /* count also the report id, if this was a numbered report. */
935 if (ret > 0 && skipped_report_id)
936 ret++;
937
938 return ret;
939}
940
975a6832
FP
941static int usbhid_output_report(struct hid_device *hid, __u8 *buf, size_t count)
942{
943 struct usbhid_device *usbhid = hid->driver_data;
944 struct usb_device *dev = hid_to_usb_dev(hid);
945 int actual_length, skipped_report_id = 0, ret;
946
947 if (!usbhid->urbout)
ddea1af9 948 return -ENOSYS;
975a6832
FP
949
950 if (buf[0] == 0x0) {
951 /* Don't send the Report ID */
952 buf++;
953 count--;
954 skipped_report_id = 1;
955 }
956
957 ret = usb_interrupt_msg(dev, usbhid->urbout->pipe,
958 buf, count, &actual_length,
959 USB_CTRL_SET_TIMEOUT);
960 /* return the number of bytes transferred */
961 if (ret == 0) {
962 ret = actual_length;
963 /* count also the report id */
964 if (skipped_report_id)
965 ret++;
966 }
967
968 return ret;
969}
970
1da177e4
LT
971static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
972{
4916b3a5
JK
973 struct usbhid_device *usbhid = hid->driver_data;
974
997ea58e
DM
975 usb_free_coherent(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
976 usb_free_coherent(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
0ede76fc 977 kfree(usbhid->cr);
997ea58e 978 usb_free_coherent(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
1da177e4
LT
979}
980
c500c971
JS
981static int usbhid_parse(struct hid_device *hid)
982{
983 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
1da177e4
LT
984 struct usb_host_interface *interface = intf->cur_altsetting;
985 struct usb_device *dev = interface_to_usbdev (intf);
986 struct hid_descriptor *hdesc;
2eb5dc30 987 u32 quirks = 0;
c500c971 988 unsigned int rsize = 0;
c5b7c7c3 989 char *rdesc;
c500c971 990 int ret, n;
f043bfc9
JK
991 int num_descriptors;
992 size_t offset = offsetof(struct hid_descriptor, desc);
1da177e4 993
d5d3e202 994 quirks = hid_lookup_quirk(hid);
1da177e4 995
6f4303fb
JK
996 if (quirks & HID_QUIRK_IGNORE)
997 return -ENODEV;
998
0f28b55d
AS
999 /* Many keyboards and mice don't like to be polled for reports,
1000 * so we will always set the HID_QUIRK_NOGET flag for them. */
1001 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
1002 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
1003 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
1004 quirks |= HID_QUIRK_NOGET;
1005 }
1006
c5b7c7c3
DT
1007 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
1008 (!interface->desc.bNumEndpoints ||
1009 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
58037eb9 1010 dbg_hid("class descriptor not present\n");
c500c971 1011 return -ENODEV;
1da177e4
LT
1012 }
1013
f043bfc9
JK
1014 if (hdesc->bLength < sizeof(struct hid_descriptor)) {
1015 dbg_hid("hid descriptor is too short\n");
1016 return -EINVAL;
1017 }
1018
c500c971
JS
1019 hid->version = le16_to_cpu(hdesc->bcdHID);
1020 hid->country = hdesc->bCountryCode;
1021
f043bfc9
JK
1022 num_descriptors = min_t(int, hdesc->bNumDescriptors,
1023 (hdesc->bLength - offset) / sizeof(struct hid_class_descriptor));
1024
1025 for (n = 0; n < num_descriptors; n++)
1da177e4
LT
1026 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
1027 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
1028
1029 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
58037eb9 1030 dbg_hid("weird size of report descriptor (%u)\n", rsize);
c500c971 1031 return -EINVAL;
1da177e4
LT
1032 }
1033
52150c78
JP
1034 rdesc = kmalloc(rsize, GFP_KERNEL);
1035 if (!rdesc)
c500c971 1036 return -ENOMEM;
1da177e4 1037
854561b0
VP
1038 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
1039
c500c971
JS
1040 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
1041 HID_DT_REPORT, rdesc, rsize);
1042 if (ret < 0) {
58037eb9 1043 dbg_hid("reading report descriptor failed\n");
1da177e4 1044 kfree(rdesc);
c500c971 1045 goto err;
1da177e4
LT
1046 }
1047
c500c971
JS
1048 ret = hid_parse_report(hid, rdesc, rsize);
1049 kfree(rdesc);
1050 if (ret) {
58037eb9 1051 dbg_hid("parsing report descriptor failed\n");
c500c971 1052 goto err;
1da177e4
LT
1053 }
1054
f5208997 1055 hid->quirks |= quirks;
1da177e4 1056
c500c971
JS
1057 return 0;
1058err:
1059 return ret;
1060}
1061
1062static int usbhid_start(struct hid_device *hid)
1063{
1064 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
1065 struct usb_host_interface *interface = intf->cur_altsetting;
1066 struct usb_device *dev = interface_to_usbdev(intf);
3d5afd32 1067 struct usbhid_device *usbhid = hid->driver_data;
c500c971
JS
1068 unsigned int n, insize = 0;
1069 int ret;
1070
0ed08fad
AS
1071 mutex_lock(&usbhid->mutex);
1072
e3e14de5
JS
1073 clear_bit(HID_DISCONNECTED, &usbhid->iofl);
1074
4916b3a5
JK
1075 usbhid->bufsize = HID_MIN_BUFFER_SIZE;
1076 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
1077 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
1078 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
bf0964dc 1079
4916b3a5
JK
1080 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
1081 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
bf0964dc
MH
1082
1083 hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
1084
1085 if (insize > HID_MAX_BUFFER_SIZE)
1086 insize = HID_MAX_BUFFER_SIZE;
1087
c500c971
JS
1088 if (hid_alloc_buffers(dev, hid)) {
1089 ret = -ENOMEM;
1da177e4 1090 goto fail;
f345c37c
PS
1091 }
1092
1da177e4 1093 for (n = 0; n < interface->desc.bNumEndpoints; n++) {
1da177e4
LT
1094 struct usb_endpoint_descriptor *endpoint;
1095 int pipe;
1096 int interval;
1097
1098 endpoint = &interface->endpoint[n].desc;
581a2739 1099 if (!usb_endpoint_xfer_int(endpoint))
1da177e4
LT
1100 continue;
1101
1da177e4 1102 interval = endpoint->bInterval;
1da177e4 1103
f345c37c 1104 /* Some vendors give fullspeed interval on highspeed devides */
c500c971 1105 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
f345c37c
PS
1106 dev->speed == USB_SPEED_HIGH) {
1107 interval = fls(endpoint->bInterval*8);
52150c78
JP
1108 pr_info("%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
1109 hid->name, endpoint->bInterval, interval);
f345c37c
PS
1110 }
1111
2ddc8e2d
FA
1112 /* Change the polling interval of mice, joysticks
1113 * and keyboards.
1114 */
933bfe4d
TJ
1115 switch (hid->collection->usage) {
1116 case HID_GD_MOUSE:
1117 if (hid_mousepoll_interval > 0)
1118 interval = hid_mousepoll_interval;
1119 break;
1120 case HID_GD_JOYSTICK:
1121 if (hid_jspoll_interval > 0)
1122 interval = hid_jspoll_interval;
1123 break;
2ddc8e2d
FA
1124 case HID_GD_KEYBOARD:
1125 if (hid_kbpoll_interval > 0)
1126 interval = hid_kbpoll_interval;
1127 break;
933bfe4d 1128 }
05f091ab 1129
c500c971 1130 ret = -ENOMEM;
0f12aa03 1131 if (usb_endpoint_dir_in(endpoint)) {
4916b3a5 1132 if (usbhid->urbin)
1da177e4 1133 continue;
4916b3a5 1134 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
1da177e4
LT
1135 goto fail;
1136 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
4916b3a5 1137 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
1da177e4 1138 hid_irq_in, hid, interval);
4916b3a5
JK
1139 usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
1140 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1da177e4 1141 } else {
4916b3a5 1142 if (usbhid->urbout)
1da177e4 1143 continue;
4916b3a5 1144 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
1da177e4
LT
1145 goto fail;
1146 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
4916b3a5 1147 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
1da177e4 1148 hid_irq_out, hid, interval);
4916b3a5
JK
1149 usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
1150 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1da177e4
LT
1151 }
1152 }
1153
4916b3a5 1154 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
c500c971
JS
1155 if (!usbhid->urbctrl) {
1156 ret = -ENOMEM;
1da177e4 1157 goto fail;
c500c971 1158 }
c5b7c7c3 1159
4916b3a5
JK
1160 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
1161 usbhid->ctrlbuf, 1, hid_ctrl, hid);
4916b3a5 1162 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
0ede76fc 1163 usbhid->urbctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
c500c971 1164
3d5afd32 1165 set_bit(HID_STARTED, &usbhid->iofl);
3d5afd32 1166
0b750b3b
JH
1167 if (hid->quirks & HID_QUIRK_ALWAYS_POLL) {
1168 ret = usb_autopm_get_interface(usbhid->intf);
1169 if (ret)
1170 goto fail;
28cbc863 1171 set_bit(HID_IN_POLLING, &usbhid->iofl);
0b750b3b
JH
1172 usbhid->intf->needs_remote_wakeup = 1;
1173 ret = hid_start_in(hid);
1174 if (ret) {
1175 dev_err(&hid->dev,
1176 "failed to start in urb: %d\n", ret);
1177 }
1178 usb_autopm_put_interface(usbhid->intf);
1179 }
1180
08ef08ee
AS
1181 /* Some keyboards don't work until their LEDs have been set.
1182 * Since BIOSes do set the LEDs, it must be safe for any device
1183 * that supports the keyboard boot protocol.
3d61510f
AS
1184 * In addition, enable remote wakeup by default for all keyboard
1185 * devices supporting the boot protocol.
08ef08ee
AS
1186 */
1187 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1188 interface->desc.bInterfaceProtocol ==
3d61510f 1189 USB_INTERFACE_PROTOCOL_KEYBOARD) {
08ef08ee 1190 usbhid_set_leds(hid);
3d61510f
AS
1191 device_set_wakeup_enable(&dev->dev, 1);
1192 }
0ed08fad
AS
1193
1194 mutex_unlock(&usbhid->mutex);
c500c971 1195 return 0;
1da177e4
LT
1196
1197fail:
4916b3a5
JK
1198 usb_free_urb(usbhid->urbin);
1199 usb_free_urb(usbhid->urbout);
1200 usb_free_urb(usbhid->urbctrl);
e3e14de5
JS
1201 usbhid->urbin = NULL;
1202 usbhid->urbout = NULL;
1203 usbhid->urbctrl = NULL;
22f675f3 1204 hid_free_buffers(dev, hid);
0ed08fad 1205 mutex_unlock(&usbhid->mutex);
c500c971 1206 return ret;
1da177e4
LT
1207}
1208
c500c971 1209static void usbhid_stop(struct hid_device *hid)
1da177e4 1210{
c500c971 1211 struct usbhid_device *usbhid = hid->driver_data;
1da177e4 1212
c500c971 1213 if (WARN_ON(!usbhid))
1da177e4
LT
1214 return;
1215
28cbc863
DT
1216 if (hid->quirks & HID_QUIRK_ALWAYS_POLL) {
1217 clear_bit(HID_IN_POLLING, &usbhid->iofl);
0b750b3b 1218 usbhid->intf->needs_remote_wakeup = 0;
28cbc863 1219 }
0b750b3b 1220
0ed08fad
AS
1221 mutex_lock(&usbhid->mutex);
1222
3d5afd32 1223 clear_bit(HID_STARTED, &usbhid->iofl);
4371ea82 1224 spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */
69626f23 1225 set_bit(HID_DISCONNECTED, &usbhid->iofl);
0361a28d 1226 spin_unlock_irq(&usbhid->lock);
4916b3a5
JK
1227 usb_kill_urb(usbhid->urbin);
1228 usb_kill_urb(usbhid->urbout);
1229 usb_kill_urb(usbhid->urbctrl);
1da177e4 1230
0361a28d 1231 hid_cancel_delayed_stuff(usbhid);
aef4e266 1232
c500c971
JS
1233 hid->claimed = 0;
1234
4916b3a5
JK
1235 usb_free_urb(usbhid->urbin);
1236 usb_free_urb(usbhid->urbctrl);
1237 usb_free_urb(usbhid->urbout);
e3e14de5
JS
1238 usbhid->urbin = NULL; /* don't mess up next start */
1239 usbhid->urbctrl = NULL;
1240 usbhid->urbout = NULL;
1da177e4 1241
be820975 1242 hid_free_buffers(hid_to_usb_dev(hid), hid);
0ed08fad
AS
1243
1244 mutex_unlock(&usbhid->mutex);
1da177e4
LT
1245}
1246
0361a28d
ON
1247static int usbhid_power(struct hid_device *hid, int lvl)
1248{
9a83563f 1249 struct usbhid_device *usbhid = hid->driver_data;
0361a28d
ON
1250 int r = 0;
1251
1252 switch (lvl) {
1253 case PM_HINT_FULLON:
9a83563f 1254 r = usb_autopm_get_interface(usbhid->intf);
0361a28d 1255 break;
9a83563f 1256
0361a28d 1257 case PM_HINT_NORMAL:
9a83563f 1258 usb_autopm_put_interface(usbhid->intf);
0361a28d
ON
1259 break;
1260 }
9a83563f 1261
0361a28d
ON
1262 return r;
1263}
1264
e90a6df8
HR
1265static void usbhid_request(struct hid_device *hid, struct hid_report *rep, int reqtype)
1266{
1267 switch (reqtype) {
1268 case HID_REQ_GET_REPORT:
1269 usbhid_submit_report(hid, rep, USB_DIR_IN);
1270 break;
1271 case HID_REQ_SET_REPORT:
1272 usbhid_submit_report(hid, rep, USB_DIR_OUT);
1273 break;
1274 }
1275}
1276
975a6832
FP
1277static int usbhid_raw_request(struct hid_device *hid, unsigned char reportnum,
1278 __u8 *buf, size_t len, unsigned char rtype,
1279 int reqtype)
1280{
1281 switch (reqtype) {
1282 case HID_REQ_GET_REPORT:
1283 return usbhid_get_raw_report(hid, reportnum, buf, len, rtype);
1284 case HID_REQ_SET_REPORT:
1285 return usbhid_set_raw_report(hid, reportnum, buf, len, rtype);
1286 default:
1287 return -EIO;
1288 }
1289}
1290
9684819b
BT
1291static int usbhid_idle(struct hid_device *hid, int report, int idle,
1292 int reqtype)
1293{
1294 struct usb_device *dev = hid_to_usb_dev(hid);
1295 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
1296 struct usb_host_interface *interface = intf->cur_altsetting;
1297 int ifnum = interface->desc.bInterfaceNumber;
1298
1299 if (reqtype != HID_REQ_SET_IDLE)
1300 return -EINVAL;
1301
1302 return hid_set_idle(dev, ifnum, report, idle);
1303}
1304
fc2237a7 1305struct hid_ll_driver usb_hid_driver = {
c500c971
JS
1306 .parse = usbhid_parse,
1307 .start = usbhid_start,
1308 .stop = usbhid_stop,
1309 .open = usbhid_open,
1310 .close = usbhid_close,
0361a28d 1311 .power = usbhid_power,
e90a6df8 1312 .request = usbhid_request,
3373443b 1313 .wait = usbhid_wait_io,
975a6832
FP
1314 .raw_request = usbhid_raw_request,
1315 .output_report = usbhid_output_report,
9684819b 1316 .idle = usbhid_idle,
c500c971 1317};
fc2237a7 1318EXPORT_SYMBOL_GPL(usb_hid_driver);
c500c971 1319
c4c259bc 1320static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1da177e4 1321{
131d3a7a 1322 struct usb_host_interface *interface = intf->cur_altsetting;
c500c971 1323 struct usb_device *dev = interface_to_usbdev(intf);
3d5afd32 1324 struct usbhid_device *usbhid;
1da177e4 1325 struct hid_device *hid;
131d3a7a 1326 unsigned int n, has_in = 0;
c500c971
JS
1327 size_t len;
1328 int ret;
1da177e4 1329
58037eb9 1330 dbg_hid("HID probe called for ifnum %d\n",
1da177e4
LT
1331 intf->altsetting->desc.bInterfaceNumber);
1332
131d3a7a
JS
1333 for (n = 0; n < interface->desc.bNumEndpoints; n++)
1334 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1335 has_in++;
1336 if (!has_in) {
4291ee30 1337 hid_err(intf, "couldn't find an input interrupt endpoint\n");
131d3a7a
JS
1338 return -ENODEV;
1339 }
1340
c500c971
JS
1341 hid = hid_allocate_device();
1342 if (IS_ERR(hid))
1343 return PTR_ERR(hid);
1da177e4
LT
1344
1345 usb_set_intfdata(intf, hid);
c500c971 1346 hid->ll_driver = &usb_hid_driver;
76483cf4 1347 hid->ff_init = hid_pidff_init;
c500c971 1348#ifdef CONFIG_USB_HIDDEV
93c10132 1349 hid->hiddev_connect = hiddev_connect;
c4c259bc 1350 hid->hiddev_disconnect = hiddev_disconnect;
c500c971
JS
1351 hid->hiddev_hid_event = hiddev_hid_event;
1352 hid->hiddev_report_event = hiddev_report_event;
1353#endif
1354 hid->dev.parent = &intf->dev;
1355 hid->bus = BUS_USB;
1356 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1357 hid->product = le16_to_cpu(dev->descriptor.idProduct);
d5158e02 1358 hid->version = le16_to_cpu(dev->descriptor.bcdDevice);
c500c971 1359 hid->name[0] = 0;
a73a6370
JS
1360 if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1361 USB_INTERFACE_PROTOCOL_MOUSE)
1362 hid->type = HID_TYPE_USBMOUSE;
6dc1418e
TS
1363 else if (intf->cur_altsetting->desc.bInterfaceProtocol == 0)
1364 hid->type = HID_TYPE_USBNONE;
1da177e4 1365
c500c971
JS
1366 if (dev->manufacturer)
1367 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1da177e4 1368
c500c971
JS
1369 if (dev->product) {
1370 if (dev->manufacturer)
1371 strlcat(hid->name, " ", sizeof(hid->name));
1372 strlcat(hid->name, dev->product, sizeof(hid->name));
1da177e4
LT
1373 }
1374
c500c971
JS
1375 if (!strlen(hid->name))
1376 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1377 le16_to_cpu(dev->descriptor.idVendor),
1378 le16_to_cpu(dev->descriptor.idProduct));
1da177e4 1379
c500c971
JS
1380 usb_make_path(dev, hid->phys, sizeof(hid->phys));
1381 strlcat(hid->phys, "/input", sizeof(hid->phys));
1382 len = strlen(hid->phys);
1383 if (len < sizeof(hid->phys) - 1)
1384 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1385 "%d", intf->altsetting[0].desc.bInterfaceNumber);
1386
1387 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1388 hid->uniq[0] = 0;
1da177e4 1389
3d5afd32
JS
1390 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1391 if (usbhid == NULL) {
1392 ret = -ENOMEM;
1393 goto err;
1394 }
1395
1396 hid->driver_data = usbhid;
1397 usbhid->hid = hid;
57ab12e4
JK
1398 usbhid->intf = intf;
1399 usbhid->ifnum = interface->desc.bInterfaceNumber;
3d5afd32 1400
fde4e2f7
AS
1401 init_waitqueue_head(&usbhid->wait);
1402 INIT_WORK(&usbhid->reset_work, hid_reset);
0ee32774 1403 timer_setup(&usbhid->io_retry, hid_retry_timeout, 0);
fde4e2f7 1404 spin_lock_init(&usbhid->lock);
0ed08fad 1405 mutex_init(&usbhid->mutex);
fde4e2f7 1406
85cdaf52
JS
1407 ret = hid_add_device(hid);
1408 if (ret) {
d458a9df 1409 if (ret != -ENODEV)
4291ee30 1410 hid_err(intf, "can't add hid device: %d\n", ret);
3d5afd32 1411 goto err_free;
85cdaf52 1412 }
c500c971
JS
1413
1414 return 0;
3d5afd32
JS
1415err_free:
1416 kfree(usbhid);
c500c971
JS
1417err:
1418 hid_destroy_device(hid);
85cdaf52 1419 return ret;
1da177e4
LT
1420}
1421
c4c259bc 1422static void usbhid_disconnect(struct usb_interface *intf)
c500c971
JS
1423{
1424 struct hid_device *hid = usb_get_intfdata(intf);
3d5afd32 1425 struct usbhid_device *usbhid;
c500c971
JS
1426
1427 if (WARN_ON(!hid))
1428 return;
1429
3d5afd32 1430 usbhid = hid->driver_data;
46df9ded
RA
1431 spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */
1432 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1433 spin_unlock_irq(&usbhid->lock);
c500c971 1434 hid_destroy_device(hid);
3d5afd32 1435 kfree(usbhid);
c500c971
JS
1436}
1437
0361a28d
ON
1438static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1439{
1440 del_timer_sync(&usbhid->io_retry);
0361a28d
ON
1441 cancel_work_sync(&usbhid->reset_work);
1442}
1443
1444static void hid_cease_io(struct usbhid_device *usbhid)
1445{
fad9fbe8 1446 del_timer_sync(&usbhid->io_retry);
0361a28d
ON
1447 usb_kill_urb(usbhid->urbin);
1448 usb_kill_urb(usbhid->urbctrl);
1449 usb_kill_urb(usbhid->urbout);
0361a28d
ON
1450}
1451
972e6a99
AS
1452static void hid_restart_io(struct hid_device *hid)
1453{
1454 struct usbhid_device *usbhid = hid->driver_data;
1455 int clear_halt = test_bit(HID_CLEAR_HALT, &usbhid->iofl);
1456 int reset_pending = test_bit(HID_RESET_PENDING, &usbhid->iofl);
1457
1458 spin_lock_irq(&usbhid->lock);
1459 clear_bit(HID_SUSPENDED, &usbhid->iofl);
1460 usbhid_mark_busy(usbhid);
1461
1462 if (clear_halt || reset_pending)
1463 schedule_work(&usbhid->reset_work);
1464 usbhid->retry_delay = 0;
1465 spin_unlock_irq(&usbhid->lock);
1466
1467 if (reset_pending || !test_bit(HID_STARTED, &usbhid->iofl))
1468 return;
1469
1470 if (!clear_halt) {
1471 if (hid_start_in(hid) < 0)
1472 hid_io_error(hid);
1473 }
1474
1475 spin_lock_irq(&usbhid->lock);
1476 if (usbhid->urbout && !test_bit(HID_OUT_RUNNING, &usbhid->iofl))
1477 usbhid_restart_out_queue(usbhid);
1478 if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
1479 usbhid_restart_ctrl_queue(usbhid);
1480 spin_unlock_irq(&usbhid->lock);
1481}
1482
ae2f0074
JK
1483/* Treat USB reset pretty much the same as suspend/resume */
1484static int hid_pre_reset(struct usb_interface *intf)
1485{
1486 struct hid_device *hid = usb_get_intfdata(intf);
1487 struct usbhid_device *usbhid = hid->driver_data;
1488
1489 spin_lock_irq(&usbhid->lock);
1490 set_bit(HID_RESET_PENDING, &usbhid->iofl);
1491 spin_unlock_irq(&usbhid->lock);
1492 hid_cease_io(usbhid);
1493
1494 return 0;
1495}
1496
1497/* Same routine used for post_reset and reset_resume */
1498static int hid_post_reset(struct usb_interface *intf)
1499{
1500 struct usb_device *dev = interface_to_usbdev (intf);
1501 struct hid_device *hid = usb_get_intfdata(intf);
1502 struct usbhid_device *usbhid = hid->driver_data;
dc3c78e4 1503 struct usb_host_interface *interface = intf->cur_altsetting;
ae2f0074 1504 int status;
dc3c78e4
SH
1505 char *rdesc;
1506
1507 /* Fetch and examine the HID report descriptor. If this
1508 * has changed, then rebind. Since usbcore's check of the
1509 * configuration descriptors passed, we already know that
1510 * the size of the HID report descriptor has not changed.
1511 */
86e6b77e 1512 rdesc = kmalloc(hid->dev_rsize, GFP_KERNEL);
52150c78 1513 if (!rdesc)
c60fa555 1514 return -ENOMEM;
52150c78 1515
dc3c78e4
SH
1516 status = hid_get_class_descriptor(dev,
1517 interface->desc.bInterfaceNumber,
86e6b77e 1518 HID_DT_REPORT, rdesc, hid->dev_rsize);
dc3c78e4
SH
1519 if (status < 0) {
1520 dbg_hid("reading report descriptor failed (post_reset)\n");
1521 kfree(rdesc);
c60fa555 1522 return status;
dc3c78e4 1523 }
86e6b77e 1524 status = memcmp(rdesc, hid->dev_rdesc, hid->dev_rsize);
dc3c78e4
SH
1525 kfree(rdesc);
1526 if (status != 0) {
1527 dbg_hid("report descriptor changed\n");
c60fa555 1528 return -EPERM;
dc3c78e4 1529 }
70fa9f2e 1530
972e6a99 1531 /* No need to do another reset or clear a halted endpoint */
ae2f0074
JK
1532 spin_lock_irq(&usbhid->lock);
1533 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
972e6a99 1534 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
ae2f0074
JK
1535 spin_unlock_irq(&usbhid->lock);
1536 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
972e6a99
AS
1537
1538 hid_restart_io(hid);
ae2f0074
JK
1539
1540 return 0;
1541}
1542
0f6f1407 1543#ifdef CONFIG_PM
eb055fd0
AS
1544static int hid_resume_common(struct hid_device *hid, bool driver_suspended)
1545{
972e6a99 1546 int status = 0;
eb055fd0 1547
972e6a99 1548 hid_restart_io(hid);
eb055fd0
AS
1549 if (driver_suspended && hid->driver && hid->driver->resume)
1550 status = hid->driver->resume(hid);
1551 return status;
1552}
1553
27d72e85 1554static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1da177e4 1555{
0361a28d 1556 struct hid_device *hid = usb_get_intfdata(intf);
4916b3a5 1557 struct usbhid_device *usbhid = hid->driver_data;
37093b70 1558 int status = 0;
eb055fd0 1559 bool driver_suspended = false;
bfde79cb 1560 unsigned int ledcount;
1da177e4 1561
5b1b0b81 1562 if (PMSG_IS_AUTO(message)) {
bfde79cb 1563 ledcount = hidinput_count_leds(hid);
0361a28d
ON
1564 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1565 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1566 && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1567 && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1568 && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1569 && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
bfde79cb 1570 && (!ledcount || ignoreled))
0361a28d 1571 {
f2b5264d 1572 set_bit(HID_SUSPENDED, &usbhid->iofl);
0361a28d 1573 spin_unlock_irq(&usbhid->lock);
6a740aa4
BP
1574 if (hid->driver && hid->driver->suspend) {
1575 status = hid->driver->suspend(hid, message);
1576 if (status < 0)
eb055fd0 1577 goto failed;
6a740aa4 1578 }
eb055fd0 1579 driver_suspended = true;
0361a28d
ON
1580 } else {
1581 usbhid_mark_busy(usbhid);
1582 spin_unlock_irq(&usbhid->lock);
1583 return -EBUSY;
1584 }
3d5afd32 1585
0361a28d 1586 } else {
37093b70
ML
1587 /* TODO: resume() might need to handle suspend failure */
1588 if (hid->driver && hid->driver->suspend)
6a740aa4 1589 status = hid->driver->suspend(hid, message);
eb055fd0 1590 driver_suspended = true;
0361a28d 1591 spin_lock_irq(&usbhid->lock);
f2b5264d 1592 set_bit(HID_SUSPENDED, &usbhid->iofl);
0361a28d 1593 spin_unlock_irq(&usbhid->lock);
37093b70 1594 if (usbhid_wait_io(hid) < 0)
eb055fd0 1595 status = -EIO;
0361a28d
ON
1596 }
1597
0361a28d
ON
1598 hid_cancel_delayed_stuff(usbhid);
1599 hid_cease_io(usbhid);
1600
5b1b0b81 1601 if (PMSG_IS_AUTO(message) && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
0361a28d 1602 /* lost race against keypresses */
eb055fd0
AS
1603 status = -EBUSY;
1604 goto failed;
0361a28d 1605 }
1da177e4 1606 dev_dbg(&intf->dev, "suspend\n");
37093b70 1607 return status;
eb055fd0
AS
1608
1609 failed:
1610 hid_resume_common(hid, driver_suspended);
1611 return status;
1da177e4
LT
1612}
1613
1614static int hid_resume(struct usb_interface *intf)
1615{
1616 struct hid_device *hid = usb_get_intfdata (intf);
1617 int status;
1618
eb055fd0 1619 status = hid_resume_common(hid, true);
1da177e4 1620 dev_dbg(&intf->dev, "resume status %d\n", status);
f07600cf 1621 return 0;
df9a1f48
AS
1622}
1623
378a0ede 1624static int hid_reset_resume(struct usb_interface *intf)
df9a1f48 1625{
378a0ede 1626 struct hid_device *hid = usb_get_intfdata(intf);
6a740aa4 1627 int status;
df9a1f48 1628
6a740aa4
BP
1629 status = hid_post_reset(intf);
1630 if (status >= 0 && hid->driver && hid->driver->reset_resume) {
1631 int ret = hid->driver->reset_resume(hid);
1632 if (ret < 0)
1633 status = ret;
1634 }
1635 return status;
df9a1f48
AS
1636}
1637
ae2f0074 1638#endif /* CONFIG_PM */
df9a1f48 1639
d67dec5b 1640static const struct usb_device_id hid_usb_ids[] = {
1da177e4
LT
1641 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1642 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1643 { } /* Terminating entry */
1644};
1645
1646MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1647
1648static struct usb_driver hid_driver = {
1da177e4 1649 .name = "usbhid",
c4c259bc
JK
1650 .probe = usbhid_probe,
1651 .disconnect = usbhid_disconnect,
0f6f1407 1652#ifdef CONFIG_PM
1da177e4
LT
1653 .suspend = hid_suspend,
1654 .resume = hid_resume,
378a0ede 1655 .reset_resume = hid_reset_resume,
0f6f1407 1656#endif
df9a1f48
AS
1657 .pre_reset = hid_pre_reset,
1658 .post_reset = hid_post_reset,
1da177e4 1659 .id_table = hid_usb_ids,
933e3187 1660 .supports_autosuspend = 1,
1da177e4
LT
1661};
1662
8fe294ca
GC
1663struct usb_interface *usbhid_find_interface(int minor)
1664{
1665 return usb_find_interface(&hid_driver, minor);
1666}
1667
1da177e4
LT
1668static int __init hid_init(void)
1669{
0361a28d
ON
1670 int retval = -ENOMEM;
1671
d5d3e202 1672 retval = hid_quirks_init(quirks_param, BUS_USB, MAX_USBHID_BOOT_QUIRKS);
876b9276
PW
1673 if (retval)
1674 goto usbhid_quirks_init_fail;
1da177e4
LT
1675 retval = usb_register(&hid_driver);
1676 if (retval)
1677 goto usb_register_fail;
52150c78 1678 pr_info(KBUILD_MODNAME ": " DRIVER_DESC "\n");
1da177e4
LT
1679
1680 return 0;
1681usb_register_fail:
d5d3e202 1682 hid_quirks_exit(BUS_USB);
876b9276 1683usbhid_quirks_init_fail:
1da177e4
LT
1684 return retval;
1685}
1686
1687static void __exit hid_exit(void)
1688{
1689 usb_deregister(&hid_driver);
d5d3e202 1690 hid_quirks_exit(BUS_USB);
1da177e4
LT
1691}
1692
1693module_init(hid_init);
1694module_exit(hid_exit);
1695
88adb72b
JK
1696MODULE_AUTHOR("Andreas Gal");
1697MODULE_AUTHOR("Vojtech Pavlik");
1698MODULE_AUTHOR("Jiri Kosina");
1da177e4 1699MODULE_DESCRIPTION(DRIVER_DESC);
7021b600 1700MODULE_LICENSE("GPL");