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Commit | Line | Data |
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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 | ||
48 | static unsigned int hid_mousepoll_interval; | |
49 | module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644); | |
50 | MODULE_PARM_DESC(mousepoll, "Polling interval of mice"); | |
51 | ||
933bfe4d TJ |
52 | static unsigned int hid_jspoll_interval; |
53 | module_param_named(jspoll, hid_jspoll_interval, uint, 0644); | |
54 | MODULE_PARM_DESC(jspoll, "Polling interval of joysticks"); | |
55 | ||
2ddc8e2d FA |
56 | static unsigned int hid_kbpoll_interval; |
57 | module_param_named(kbpoll, hid_kbpoll_interval, uint, 0644); | |
58 | MODULE_PARM_DESC(kbpoll, "Polling interval of keyboards"); | |
59 | ||
0361a28d ON |
60 | static unsigned int ignoreled; |
61 | module_param_named(ignoreled, ignoreled, uint, 0644); | |
62 | MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds"); | |
63 | ||
876b9276 | 64 | /* Quirks specified at module load time */ |
81ba9926 | 65 | static char *quirks_param[MAX_USBHID_BOOT_QUIRKS]; |
876b9276 PW |
66 | module_param_array_named(quirks, quirks_param, charp, NULL, 0444); |
67 | MODULE_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 | 74 | static void hid_io_error(struct hid_device *hid); |
0361a28d ON |
75 | static int hid_submit_out(struct hid_device *hid); |
76 | static int hid_submit_ctrl(struct hid_device *hid); | |
77 | static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid); | |
48b4554a JK |
78 | |
79 | /* Start up the input URB */ | |
80 | static 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 | 105 | static 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 */ |
116 | static 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 */ |
143 | static 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)); | |
179 | done: | |
0361a28d ON |
180 | spin_unlock_irqrestore(&usbhid->lock, flags); |
181 | } | |
182 | ||
183 | static 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 | ||
190 | static 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 | ||
228 | static 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 | 271 | static 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 | 335 | static 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 | ||
365 | static 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 |
429 | static 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 |
476 | static 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 |
523 | static 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 | 632 | static 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 | 642 | static 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 |
657 | static 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 |
664 | static 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 | 680 | static 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 | 739 | static 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 |
769 | void 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 | */ | |
802 | static 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 | 826 | static 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 |
840 | static 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 |
853 | static 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 |
871 | static 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 |
905 | static 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 |
941 | static 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 |
971 | static 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 |
981 | static 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; |
1058 | err: | |
1059 | return ret; | |
1060 | } | |
1061 | ||
1062 | static 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 | |
1197 | fail: | |
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 | 1209 | static 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 |
1247 | static 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 |
1265 | static 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 |
1277 | static 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 |
1291 | static 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 | 1305 | struct 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 | 1318 | EXPORT_SYMBOL_GPL(usb_hid_driver); |
c500c971 | 1319 | |
c4c259bc | 1320 | static 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 |
1415 | err_free: |
1416 | kfree(usbhid); | |
c500c971 JS |
1417 | err: |
1418 | hid_destroy_device(hid); | |
85cdaf52 | 1419 | return ret; |
1da177e4 LT |
1420 | } |
1421 | ||
c4c259bc | 1422 | static 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 |
1438 | static 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 | ||
1444 | static 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 |
1452 | static 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 */ |
1484 | static 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 */ | |
1498 | static 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 |
1544 | static 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 | 1554 | static 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 | ||
1614 | static 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 | 1624 | static 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 | 1640 | static 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 | ||
1646 | MODULE_DEVICE_TABLE (usb, hid_usb_ids); | |
1647 | ||
1648 | static 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 |
1663 | struct usb_interface *usbhid_find_interface(int minor) |
1664 | { | |
1665 | return usb_find_interface(&hid_driver, minor); | |
1666 | } | |
1667 | ||
1da177e4 LT |
1668 | static 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; | |
1681 | usb_register_fail: | |
d5d3e202 | 1682 | hid_quirks_exit(BUS_USB); |
876b9276 | 1683 | usbhid_quirks_init_fail: |
1da177e4 LT |
1684 | return retval; |
1685 | } | |
1686 | ||
1687 | static void __exit hid_exit(void) | |
1688 | { | |
1689 | usb_deregister(&hid_driver); | |
d5d3e202 | 1690 | hid_quirks_exit(BUS_USB); |
1da177e4 LT |
1691 | } |
1692 | ||
1693 | module_init(hid_init); | |
1694 | module_exit(hid_exit); | |
1695 | ||
88adb72b JK |
1696 | MODULE_AUTHOR("Andreas Gal"); |
1697 | MODULE_AUTHOR("Vojtech Pavlik"); | |
1698 | MODULE_AUTHOR("Jiri Kosina"); | |
1da177e4 | 1699 | MODULE_DESCRIPTION(DRIVER_DESC); |
7021b600 | 1700 | MODULE_LICENSE("GPL"); |