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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * USB HID support for Linux | |
3 | * | |
4 | * Copyright (c) 1999 Andreas Gal | |
bf0964dc MH |
5 | * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> |
6 | * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc | |
0361a28d | 7 | * Copyright (c) 2007-2008 Oliver Neukum |
7d39e849 | 8 | * Copyright (c) 2006-2010 Jiri Kosina |
1da177e4 LT |
9 | */ |
10 | ||
11 | /* | |
12 | * This program is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License as published by the Free | |
14 | * Software Foundation; either version 2 of the License, or (at your option) | |
15 | * any later version. | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/kernel.h> | |
1da177e4 LT |
22 | #include <linux/list.h> |
23 | #include <linux/mm.h> | |
3d5afd32 | 24 | #include <linux/mutex.h> |
1da177e4 LT |
25 | #include <linux/spinlock.h> |
26 | #include <asm/unaligned.h> | |
27 | #include <asm/byteorder.h> | |
28 | #include <linux/input.h> | |
29 | #include <linux/wait.h> | |
0361a28d | 30 | #include <linux/workqueue.h> |
dc3c78e4 | 31 | #include <linux/string.h> |
1da177e4 | 32 | |
1da177e4 LT |
33 | #include <linux/usb.h> |
34 | ||
dde5845a | 35 | #include <linux/hid.h> |
1da177e4 | 36 | #include <linux/hiddev.h> |
c080d89a | 37 | #include <linux/hid-debug.h> |
86166b7b | 38 | #include <linux/hidraw.h> |
4916b3a5 | 39 | #include "usbhid.h" |
1da177e4 LT |
40 | |
41 | /* | |
42 | * Version Information | |
43 | */ | |
44 | ||
1da177e4 | 45 | #define DRIVER_DESC "USB HID core driver" |
1da177e4 | 46 | |
1da177e4 LT |
47 | /* |
48 | * Module parameters. | |
49 | */ | |
50 | ||
51 | static unsigned int hid_mousepoll_interval; | |
52 | module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644); | |
53 | MODULE_PARM_DESC(mousepoll, "Polling interval of mice"); | |
54 | ||
933bfe4d TJ |
55 | static unsigned int hid_jspoll_interval; |
56 | module_param_named(jspoll, hid_jspoll_interval, uint, 0644); | |
57 | MODULE_PARM_DESC(jspoll, "Polling interval of joysticks"); | |
58 | ||
0361a28d ON |
59 | static unsigned int ignoreled; |
60 | module_param_named(ignoreled, ignoreled, uint, 0644); | |
61 | MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds"); | |
62 | ||
876b9276 | 63 | /* Quirks specified at module load time */ |
81ba9926 | 64 | static char *quirks_param[MAX_USBHID_BOOT_QUIRKS]; |
876b9276 PW |
65 | module_param_array_named(quirks, quirks_param, charp, NULL, 0444); |
66 | MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying " | |
67 | " quirks=vendorID:productID:quirks" | |
68 | " where vendorID, productID, and quirks are all in" | |
69 | " 0x-prefixed hex"); | |
1da177e4 | 70 | /* |
48b4554a | 71 | * Input submission and I/O error handler. |
1da177e4 | 72 | */ |
48b4554a | 73 | static void hid_io_error(struct hid_device *hid); |
0361a28d ON |
74 | static int hid_submit_out(struct hid_device *hid); |
75 | static int hid_submit_ctrl(struct hid_device *hid); | |
76 | static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid); | |
48b4554a JK |
77 | |
78 | /* Start up the input URB */ | |
79 | static int hid_start_in(struct hid_device *hid) | |
1da177e4 | 80 | { |
1da177e4 | 81 | unsigned long flags; |
48b4554a JK |
82 | int rc = 0; |
83 | struct usbhid_device *usbhid = hid->driver_data; | |
1da177e4 | 84 | |
0361a28d | 85 | spin_lock_irqsave(&usbhid->lock, flags); |
28cbc863 DT |
86 | if (test_bit(HID_IN_POLLING, &usbhid->iofl) && |
87 | !test_bit(HID_DISCONNECTED, &usbhid->iofl) && | |
88 | !test_bit(HID_SUSPENDED, &usbhid->iofl) && | |
89 | !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) { | |
48b4554a | 90 | rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC); |
a8c52b66 | 91 | if (rc != 0) { |
48b4554a | 92 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
a8c52b66 ON |
93 | if (rc == -ENOSPC) |
94 | set_bit(HID_NO_BANDWIDTH, &usbhid->iofl); | |
95 | } else { | |
96 | clear_bit(HID_NO_BANDWIDTH, &usbhid->iofl); | |
97 | } | |
1da177e4 | 98 | } |
0361a28d | 99 | spin_unlock_irqrestore(&usbhid->lock, flags); |
48b4554a | 100 | return rc; |
1da177e4 LT |
101 | } |
102 | ||
48b4554a JK |
103 | /* I/O retry timer routine */ |
104 | static void hid_retry_timeout(unsigned long _hid) | |
1da177e4 | 105 | { |
48b4554a | 106 | struct hid_device *hid = (struct hid_device *) _hid; |
4916b3a5 | 107 | struct usbhid_device *usbhid = hid->driver_data; |
1da177e4 | 108 | |
48b4554a JK |
109 | dev_dbg(&usbhid->intf->dev, "retrying intr urb\n"); |
110 | if (hid_start_in(hid)) | |
111 | hid_io_error(hid); | |
1da177e4 LT |
112 | } |
113 | ||
48b4554a JK |
114 | /* Workqueue routine to reset the device or clear a halt */ |
115 | static void hid_reset(struct work_struct *work) | |
1da177e4 | 116 | { |
48b4554a JK |
117 | struct usbhid_device *usbhid = |
118 | container_of(work, struct usbhid_device, reset_work); | |
119 | struct hid_device *hid = usbhid->hid; | |
8f507ef5 | 120 | int rc; |
1da177e4 | 121 | |
48b4554a JK |
122 | if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) { |
123 | dev_dbg(&usbhid->intf->dev, "clear halt\n"); | |
124 | rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe); | |
125 | clear_bit(HID_CLEAR_HALT, &usbhid->iofl); | |
011b15df | 126 | if (rc == 0) { |
8f507ef5 AS |
127 | hid_start_in(hid); |
128 | } else { | |
129 | dev_dbg(&usbhid->intf->dev, | |
130 | "clear-halt failed: %d\n", rc); | |
131 | set_bit(HID_RESET_PENDING, &usbhid->iofl); | |
1da177e4 | 132 | } |
1da177e4 LT |
133 | } |
134 | ||
8f507ef5 AS |
135 | if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) { |
136 | dev_dbg(&usbhid->intf->dev, "resetting device\n"); | |
137 | usb_queue_reset_device(usbhid->intf); | |
1da177e4 | 138 | } |
1da177e4 LT |
139 | } |
140 | ||
48b4554a JK |
141 | /* Main I/O error handler */ |
142 | static void hid_io_error(struct hid_device *hid) | |
dde5845a | 143 | { |
48b4554a JK |
144 | unsigned long flags; |
145 | struct usbhid_device *usbhid = hid->driver_data; | |
dde5845a | 146 | |
0361a28d | 147 | spin_lock_irqsave(&usbhid->lock, flags); |
dde5845a | 148 | |
48b4554a | 149 | /* Stop when disconnected */ |
69626f23 | 150 | if (test_bit(HID_DISCONNECTED, &usbhid->iofl)) |
48b4554a | 151 | goto done; |
dde5845a | 152 | |
5e2a55f2 AS |
153 | /* If it has been a while since the last error, we'll assume |
154 | * this a brand new error and reset the retry timeout. */ | |
155 | if (time_after(jiffies, usbhid->stop_retry + HZ/2)) | |
156 | usbhid->retry_delay = 0; | |
157 | ||
48b4554a JK |
158 | /* When an error occurs, retry at increasing intervals */ |
159 | if (usbhid->retry_delay == 0) { | |
160 | usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */ | |
161 | usbhid->stop_retry = jiffies + msecs_to_jiffies(1000); | |
162 | } else if (usbhid->retry_delay < 100) | |
163 | usbhid->retry_delay *= 2; | |
dde5845a | 164 | |
48b4554a | 165 | if (time_after(jiffies, usbhid->stop_retry)) { |
4916b3a5 | 166 | |
a8c52b66 | 167 | /* Retries failed, so do a port reset unless we lack bandwidth*/ |
3af4e5a9 | 168 | if (!test_bit(HID_NO_BANDWIDTH, &usbhid->iofl) |
a8c52b66 ON |
169 | && !test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) { |
170 | ||
48b4554a JK |
171 | schedule_work(&usbhid->reset_work); |
172 | goto done; | |
173 | } | |
1da177e4 LT |
174 | } |
175 | ||
48b4554a JK |
176 | mod_timer(&usbhid->io_retry, |
177 | jiffies + msecs_to_jiffies(usbhid->retry_delay)); | |
178 | done: | |
0361a28d ON |
179 | spin_unlock_irqrestore(&usbhid->lock, flags); |
180 | } | |
181 | ||
182 | static void usbhid_mark_busy(struct usbhid_device *usbhid) | |
183 | { | |
184 | struct usb_interface *intf = usbhid->intf; | |
185 | ||
186 | usb_mark_last_busy(interface_to_usbdev(intf)); | |
187 | } | |
188 | ||
189 | static int usbhid_restart_out_queue(struct usbhid_device *usbhid) | |
190 | { | |
191 | struct hid_device *hid = usb_get_intfdata(usbhid->intf); | |
192 | int kicked; | |
f0befcd6 | 193 | int r; |
0361a28d | 194 | |
d4150c8f AS |
195 | if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) || |
196 | test_bit(HID_SUSPENDED, &usbhid->iofl)) | |
0361a28d ON |
197 | return 0; |
198 | ||
199 | if ((kicked = (usbhid->outhead != usbhid->outtail))) { | |
6cc203d7 | 200 | hid_dbg(hid, "Kicking head %d tail %d", usbhid->outhead, usbhid->outtail); |
f0befcd6 | 201 | |
01a7c984 | 202 | /* Try to wake up from autosuspend... */ |
f0befcd6 DK |
203 | r = usb_autopm_get_interface_async(usbhid->intf); |
204 | if (r < 0) | |
205 | return r; | |
01a7c984 AS |
206 | |
207 | /* | |
208 | * If still suspended, don't submit. Submission will | |
209 | * occur if/when resume drains the queue. | |
210 | */ | |
f2b5264d | 211 | if (test_bit(HID_SUSPENDED, &usbhid->iofl)) { |
01a7c984 AS |
212 | usb_autopm_put_interface_no_suspend(usbhid->intf); |
213 | return r; | |
214 | } | |
215 | ||
f0befcd6 DK |
216 | /* Asynchronously flush queue. */ |
217 | set_bit(HID_OUT_RUNNING, &usbhid->iofl); | |
0361a28d ON |
218 | if (hid_submit_out(hid)) { |
219 | clear_bit(HID_OUT_RUNNING, &usbhid->iofl); | |
f0befcd6 | 220 | usb_autopm_put_interface_async(usbhid->intf); |
0361a28d | 221 | } |
f0befcd6 | 222 | wake_up(&usbhid->wait); |
0361a28d ON |
223 | } |
224 | return kicked; | |
225 | } | |
226 | ||
227 | static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid) | |
228 | { | |
229 | struct hid_device *hid = usb_get_intfdata(usbhid->intf); | |
230 | int kicked; | |
f0befcd6 | 231 | int r; |
0361a28d ON |
232 | |
233 | WARN_ON(hid == NULL); | |
d4150c8f AS |
234 | if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) || |
235 | test_bit(HID_SUSPENDED, &usbhid->iofl)) | |
0361a28d ON |
236 | return 0; |
237 | ||
238 | if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) { | |
6cc203d7 | 239 | hid_dbg(hid, "Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail); |
f0befcd6 | 240 | |
01a7c984 | 241 | /* Try to wake up from autosuspend... */ |
f0befcd6 DK |
242 | r = usb_autopm_get_interface_async(usbhid->intf); |
243 | if (r < 0) | |
244 | return r; | |
01a7c984 AS |
245 | |
246 | /* | |
247 | * If still suspended, don't submit. Submission will | |
248 | * occur if/when resume drains the queue. | |
249 | */ | |
f2b5264d | 250 | if (test_bit(HID_SUSPENDED, &usbhid->iofl)) { |
01a7c984 AS |
251 | usb_autopm_put_interface_no_suspend(usbhid->intf); |
252 | return r; | |
253 | } | |
254 | ||
f0befcd6 DK |
255 | /* Asynchronously flush queue. */ |
256 | set_bit(HID_CTRL_RUNNING, &usbhid->iofl); | |
0361a28d ON |
257 | if (hid_submit_ctrl(hid)) { |
258 | clear_bit(HID_CTRL_RUNNING, &usbhid->iofl); | |
f0befcd6 | 259 | usb_autopm_put_interface_async(usbhid->intf); |
0361a28d | 260 | } |
f0befcd6 | 261 | wake_up(&usbhid->wait); |
0361a28d ON |
262 | } |
263 | return kicked; | |
1da177e4 LT |
264 | } |
265 | ||
48b4554a JK |
266 | /* |
267 | * Input interrupt completion handler. | |
268 | */ | |
854561b0 | 269 | |
48b4554a | 270 | static void hid_irq_in(struct urb *urb) |
1da177e4 | 271 | { |
48b4554a | 272 | struct hid_device *hid = urb->context; |
28cbc863 | 273 | struct usbhid_device *usbhid = hid->driver_data; |
48b4554a | 274 | int status; |
1da177e4 | 275 | |
48b4554a | 276 | switch (urb->status) { |
880d29f1 JS |
277 | case 0: /* success */ |
278 | usbhid->retry_delay = 0; | |
28cbc863 | 279 | if (!test_bit(HID_OPENED, &usbhid->iofl)) |
0b750b3b | 280 | break; |
cc8a9d79 | 281 | usbhid_mark_busy(usbhid); |
b905811a BT |
282 | if (!test_bit(HID_RESUME_RUNNING, &usbhid->iofl)) { |
283 | hid_input_report(urb->context, HID_INPUT_REPORT, | |
284 | urb->transfer_buffer, | |
285 | urb->actual_length, 1); | |
286 | /* | |
287 | * autosuspend refused while keys are pressed | |
288 | * because most keyboards don't wake up when | |
289 | * a key is released | |
290 | */ | |
291 | if (hid_check_keys_pressed(hid)) | |
292 | set_bit(HID_KEYS_PRESSED, &usbhid->iofl); | |
293 | else | |
294 | clear_bit(HID_KEYS_PRESSED, &usbhid->iofl); | |
295 | } | |
880d29f1 JS |
296 | break; |
297 | case -EPIPE: /* stall */ | |
0361a28d | 298 | usbhid_mark_busy(usbhid); |
880d29f1 JS |
299 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
300 | set_bit(HID_CLEAR_HALT, &usbhid->iofl); | |
301 | schedule_work(&usbhid->reset_work); | |
302 | return; | |
303 | case -ECONNRESET: /* unlink */ | |
304 | case -ENOENT: | |
305 | case -ESHUTDOWN: /* unplug */ | |
306 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); | |
307 | return; | |
308 | case -EILSEQ: /* protocol error or unplug */ | |
309 | case -EPROTO: /* protocol error or unplug */ | |
310 | case -ETIME: /* protocol error or unplug */ | |
311 | case -ETIMEDOUT: /* Should never happen, but... */ | |
0361a28d | 312 | usbhid_mark_busy(usbhid); |
880d29f1 JS |
313 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
314 | hid_io_error(hid); | |
315 | return; | |
316 | default: /* error */ | |
4291ee30 JP |
317 | hid_warn(urb->dev, "input irq status %d received\n", |
318 | urb->status); | |
48b4554a | 319 | } |
1da177e4 | 320 | |
48b4554a JK |
321 | status = usb_submit_urb(urb, GFP_ATOMIC); |
322 | if (status) { | |
323 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); | |
324 | if (status != -EPERM) { | |
4291ee30 JP |
325 | hid_err(hid, "can't resubmit intr, %s-%s/input%d, status %d\n", |
326 | hid_to_usb_dev(hid)->bus->bus_name, | |
327 | hid_to_usb_dev(hid)->devpath, | |
328 | usbhid->ifnum, status); | |
48b4554a JK |
329 | hid_io_error(hid); |
330 | } | |
331 | } | |
1da177e4 LT |
332 | } |
333 | ||
48b4554a | 334 | static int hid_submit_out(struct hid_device *hid) |
1da177e4 | 335 | { |
48b4554a | 336 | struct hid_report *report; |
f129ea6d | 337 | char *raw_report; |
4916b3a5 | 338 | struct usbhid_device *usbhid = hid->driver_data; |
68229689 | 339 | int r; |
4916b3a5 | 340 | |
f129ea6d AH |
341 | report = usbhid->out[usbhid->outtail].report; |
342 | raw_report = usbhid->out[usbhid->outtail].raw_report; | |
1da177e4 | 343 | |
dabb05c6 | 344 | usbhid->urbout->transfer_buffer_length = hid_report_len(report); |
f0befcd6 | 345 | usbhid->urbout->dev = hid_to_usb_dev(hid); |
668160e5 AS |
346 | if (raw_report) { |
347 | memcpy(usbhid->outbuf, raw_report, | |
348 | usbhid->urbout->transfer_buffer_length); | |
349 | kfree(raw_report); | |
350 | usbhid->out[usbhid->outtail].raw_report = NULL; | |
351 | } | |
1d3e2023 | 352 | |
f0befcd6 | 353 | dbg_hid("submitting out urb\n"); |
d57cdcff | 354 | |
f0befcd6 DK |
355 | r = usb_submit_urb(usbhid->urbout, GFP_ATOMIC); |
356 | if (r < 0) { | |
357 | hid_err(hid, "usb_submit_urb(out) failed: %d\n", r); | |
358 | return r; | |
48b4554a | 359 | } |
f0befcd6 | 360 | usbhid->last_out = jiffies; |
48b4554a JK |
361 | return 0; |
362 | } | |
363 | ||
364 | static int hid_submit_ctrl(struct hid_device *hid) | |
1da177e4 LT |
365 | { |
366 | struct hid_report *report; | |
48b4554a | 367 | unsigned char dir; |
f129ea6d | 368 | char *raw_report; |
68229689 | 369 | int len, r; |
4916b3a5 | 370 | struct usbhid_device *usbhid = hid->driver_data; |
1da177e4 | 371 | |
48b4554a | 372 | report = usbhid->ctrl[usbhid->ctrltail].report; |
f129ea6d | 373 | raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report; |
48b4554a | 374 | dir = usbhid->ctrl[usbhid->ctrltail].dir; |
1da177e4 | 375 | |
f0befcd6 DK |
376 | len = ((report->size - 1) >> 3) + 1 + (report->id > 0); |
377 | if (dir == USB_DIR_OUT) { | |
378 | usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0); | |
379 | usbhid->urbctrl->transfer_buffer_length = len; | |
668160e5 AS |
380 | if (raw_report) { |
381 | memcpy(usbhid->ctrlbuf, raw_report, len); | |
382 | kfree(raw_report); | |
383 | usbhid->ctrl[usbhid->ctrltail].raw_report = NULL; | |
384 | } | |
f0befcd6 DK |
385 | } else { |
386 | int maxpacket, padlen; | |
387 | ||
388 | usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0); | |
389 | maxpacket = usb_maxpacket(hid_to_usb_dev(hid), | |
390 | usbhid->urbctrl->pipe, 0); | |
391 | if (maxpacket > 0) { | |
392 | padlen = DIV_ROUND_UP(len, maxpacket); | |
393 | padlen *= maxpacket; | |
394 | if (padlen > usbhid->bufsize) | |
395 | padlen = usbhid->bufsize; | |
396 | } else | |
397 | padlen = 0; | |
398 | usbhid->urbctrl->transfer_buffer_length = padlen; | |
48b4554a | 399 | } |
f0befcd6 DK |
400 | usbhid->urbctrl->dev = hid_to_usb_dev(hid); |
401 | ||
402 | usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir; | |
403 | usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : | |
404 | HID_REQ_GET_REPORT; | |
405 | usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | | |
406 | report->id); | |
407 | usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum); | |
408 | usbhid->cr->wLength = cpu_to_le16(len); | |
409 | ||
410 | dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n", | |
411 | usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : | |
412 | "Get_Report", | |
413 | usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength); | |
414 | ||
415 | r = usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC); | |
416 | if (r < 0) { | |
417 | hid_err(hid, "usb_submit_urb(ctrl) failed: %d\n", r); | |
418 | return r; | |
419 | } | |
420 | usbhid->last_ctrl = jiffies; | |
48b4554a JK |
421 | return 0; |
422 | } | |
1da177e4 | 423 | |
48b4554a JK |
424 | /* |
425 | * Output interrupt completion handler. | |
426 | */ | |
1da177e4 | 427 | |
48b4554a JK |
428 | static void hid_irq_out(struct urb *urb) |
429 | { | |
430 | struct hid_device *hid = urb->context; | |
431 | struct usbhid_device *usbhid = hid->driver_data; | |
432 | unsigned long flags; | |
433 | int unplug = 0; | |
1da177e4 | 434 | |
48b4554a | 435 | switch (urb->status) { |
880d29f1 JS |
436 | case 0: /* success */ |
437 | break; | |
438 | case -ESHUTDOWN: /* unplug */ | |
439 | unplug = 1; | |
440 | case -EILSEQ: /* protocol error or unplug */ | |
441 | case -EPROTO: /* protocol error or unplug */ | |
442 | case -ECONNRESET: /* unlink */ | |
443 | case -ENOENT: | |
444 | break; | |
445 | default: /* error */ | |
4291ee30 JP |
446 | hid_warn(urb->dev, "output irq status %d received\n", |
447 | urb->status); | |
48b4554a | 448 | } |
1da177e4 | 449 | |
0361a28d | 450 | spin_lock_irqsave(&usbhid->lock, flags); |
1da177e4 | 451 | |
93101af3 | 452 | if (unplug) { |
48b4554a | 453 | usbhid->outtail = usbhid->outhead; |
93101af3 | 454 | } else { |
48b4554a | 455 | usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1); |
1da177e4 | 456 | |
93101af3 AS |
457 | if (usbhid->outhead != usbhid->outtail && |
458 | hid_submit_out(hid) == 0) { | |
459 | /* Successfully submitted next urb in queue */ | |
460 | spin_unlock_irqrestore(&usbhid->lock, flags); | |
461 | return; | |
462 | } | |
48b4554a | 463 | } |
1da177e4 | 464 | |
48b4554a | 465 | clear_bit(HID_OUT_RUNNING, &usbhid->iofl); |
0361a28d | 466 | spin_unlock_irqrestore(&usbhid->lock, flags); |
68229689 | 467 | usb_autopm_put_interface_async(usbhid->intf); |
1d1bdd20 | 468 | wake_up(&usbhid->wait); |
48b4554a | 469 | } |
6345fdfd | 470 | |
48b4554a JK |
471 | /* |
472 | * Control pipe completion handler. | |
473 | */ | |
1da177e4 | 474 | |
48b4554a JK |
475 | static void hid_ctrl(struct urb *urb) |
476 | { | |
477 | struct hid_device *hid = urb->context; | |
478 | struct usbhid_device *usbhid = hid->driver_data; | |
0361a28d | 479 | int unplug = 0, status = urb->status; |
1da177e4 | 480 | |
0361a28d | 481 | switch (status) { |
880d29f1 JS |
482 | case 0: /* success */ |
483 | if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN) | |
484 | hid_input_report(urb->context, | |
485 | usbhid->ctrl[usbhid->ctrltail].report->type, | |
486 | urb->transfer_buffer, urb->actual_length, 0); | |
487 | break; | |
488 | case -ESHUTDOWN: /* unplug */ | |
489 | unplug = 1; | |
490 | case -EILSEQ: /* protocol error or unplug */ | |
491 | case -EPROTO: /* protocol error or unplug */ | |
492 | case -ECONNRESET: /* unlink */ | |
493 | case -ENOENT: | |
494 | case -EPIPE: /* report not available */ | |
495 | break; | |
496 | default: /* error */ | |
4291ee30 | 497 | hid_warn(urb->dev, "ctrl urb status %d received\n", status); |
48b4554a | 498 | } |
1da177e4 | 499 | |
e470127e IAR |
500 | spin_lock(&usbhid->lock); |
501 | ||
93101af3 | 502 | if (unplug) { |
48b4554a | 503 | usbhid->ctrltail = usbhid->ctrlhead; |
93101af3 | 504 | } else { |
48b4554a | 505 | usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1); |
1da177e4 | 506 | |
93101af3 AS |
507 | if (usbhid->ctrlhead != usbhid->ctrltail && |
508 | hid_submit_ctrl(hid) == 0) { | |
509 | /* Successfully submitted next urb in queue */ | |
510 | spin_unlock(&usbhid->lock); | |
511 | return; | |
512 | } | |
48b4554a | 513 | } |
1da177e4 | 514 | |
48b4554a | 515 | clear_bit(HID_CTRL_RUNNING, &usbhid->iofl); |
0361a28d | 516 | spin_unlock(&usbhid->lock); |
68229689 | 517 | usb_autopm_put_interface_async(usbhid->intf); |
1d1bdd20 | 518 | wake_up(&usbhid->wait); |
48b4554a | 519 | } |
1da177e4 | 520 | |
52cfc61b HS |
521 | static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report, |
522 | unsigned char dir) | |
48b4554a JK |
523 | { |
524 | int head; | |
48b4554a | 525 | struct usbhid_device *usbhid = hid->driver_data; |
1da177e4 | 526 | |
46df9ded RA |
527 | if (((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN) || |
528 | test_bit(HID_DISCONNECTED, &usbhid->iofl)) | |
48b4554a | 529 | return; |
b857c651 | 530 | |
48b4554a | 531 | if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) { |
48b4554a | 532 | if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) { |
4291ee30 | 533 | hid_warn(hid, "output queue full\n"); |
48b4554a JK |
534 | return; |
535 | } | |
1da177e4 | 536 | |
27ce4050 | 537 | usbhid->out[usbhid->outhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC); |
f129ea6d | 538 | if (!usbhid->out[usbhid->outhead].raw_report) { |
4291ee30 | 539 | hid_warn(hid, "output queueing failed\n"); |
f129ea6d AH |
540 | return; |
541 | } | |
542 | hid_output_report(report, usbhid->out[usbhid->outhead].raw_report); | |
543 | usbhid->out[usbhid->outhead].report = report; | |
48b4554a | 544 | usbhid->outhead = head; |
4871d3be | 545 | |
01a7c984 AS |
546 | /* If the queue isn't running, restart it */ |
547 | if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl)) { | |
548 | usbhid_restart_out_queue(usbhid); | |
f0befcd6 | 549 | |
01a7c984 AS |
550 | /* Otherwise see if an earlier request has timed out */ |
551 | } else if (time_after(jiffies, usbhid->last_out + HZ * 5)) { | |
552 | ||
553 | /* Prevent autosuspend following the unlink */ | |
554 | usb_autopm_get_interface_no_resume(usbhid->intf); | |
f0befcd6 | 555 | |
858155fb | 556 | /* |
01a7c984 AS |
557 | * Prevent resubmission in case the URB completes |
558 | * before we can unlink it. We don't want to cancel | |
559 | * the wrong transfer! | |
858155fb | 560 | */ |
01a7c984 AS |
561 | usb_block_urb(usbhid->urbout); |
562 | ||
563 | /* Drop lock to avoid deadlock if the callback runs */ | |
564 | spin_unlock(&usbhid->lock); | |
565 | ||
566 | usb_unlink_urb(usbhid->urbout); | |
567 | spin_lock(&usbhid->lock); | |
568 | usb_unblock_urb(usbhid->urbout); | |
569 | ||
570 | /* Unlink might have stopped the queue */ | |
571 | if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl)) | |
572 | usbhid_restart_out_queue(usbhid); | |
573 | ||
574 | /* Now we can allow autosuspend again */ | |
575 | usb_autopm_put_interface_async(usbhid->intf); | |
858155fb | 576 | } |
48b4554a JK |
577 | return; |
578 | } | |
1da177e4 | 579 | |
48b4554a | 580 | if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) { |
4291ee30 | 581 | hid_warn(hid, "control queue full\n"); |
48b4554a JK |
582 | return; |
583 | } | |
8fd80133 | 584 | |
f129ea6d | 585 | if (dir == USB_DIR_OUT) { |
27ce4050 | 586 | usbhid->ctrl[usbhid->ctrlhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC); |
f129ea6d | 587 | if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) { |
4291ee30 | 588 | hid_warn(hid, "control queueing failed\n"); |
f129ea6d AH |
589 | return; |
590 | } | |
591 | hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report); | |
592 | } | |
48b4554a JK |
593 | usbhid->ctrl[usbhid->ctrlhead].report = report; |
594 | usbhid->ctrl[usbhid->ctrlhead].dir = dir; | |
595 | usbhid->ctrlhead = head; | |
8fd80133 | 596 | |
01a7c984 AS |
597 | /* If the queue isn't running, restart it */ |
598 | if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) { | |
599 | usbhid_restart_ctrl_queue(usbhid); | |
f0befcd6 | 600 | |
01a7c984 AS |
601 | /* Otherwise see if an earlier request has timed out */ |
602 | } else if (time_after(jiffies, usbhid->last_ctrl + HZ * 5)) { | |
603 | ||
604 | /* Prevent autosuspend following the unlink */ | |
605 | usb_autopm_get_interface_no_resume(usbhid->intf); | |
f0befcd6 | 606 | |
858155fb | 607 | /* |
01a7c984 AS |
608 | * Prevent resubmission in case the URB completes |
609 | * before we can unlink it. We don't want to cancel | |
610 | * the wrong transfer! | |
858155fb | 611 | */ |
01a7c984 AS |
612 | usb_block_urb(usbhid->urbctrl); |
613 | ||
614 | /* Drop lock to avoid deadlock if the callback runs */ | |
615 | spin_unlock(&usbhid->lock); | |
616 | ||
617 | usb_unlink_urb(usbhid->urbctrl); | |
618 | spin_lock(&usbhid->lock); | |
619 | usb_unblock_urb(usbhid->urbctrl); | |
620 | ||
621 | /* Unlink might have stopped the queue */ | |
622 | if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) | |
623 | usbhid_restart_ctrl_queue(usbhid); | |
624 | ||
625 | /* Now we can allow autosuspend again */ | |
626 | usb_autopm_put_interface_async(usbhid->intf); | |
858155fb | 627 | } |
0361a28d | 628 | } |
931e24b9 | 629 | |
d8814272 | 630 | static void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir) |
0361a28d ON |
631 | { |
632 | struct usbhid_device *usbhid = hid->driver_data; | |
633 | unsigned long flags; | |
931e24b9 | 634 | |
0361a28d ON |
635 | spin_lock_irqsave(&usbhid->lock, flags); |
636 | __usbhid_submit_report(hid, report, dir); | |
637 | spin_unlock_irqrestore(&usbhid->lock, flags); | |
48b4554a | 638 | } |
23b0d968 | 639 | |
b7966a4d | 640 | static int usbhid_wait_io(struct hid_device *hid) |
48b4554a JK |
641 | { |
642 | struct usbhid_device *usbhid = hid->driver_data; | |
25914662 | 643 | |
1d1bdd20 JS |
644 | if (!wait_event_timeout(usbhid->wait, |
645 | (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) && | |
646 | !test_bit(HID_OUT_RUNNING, &usbhid->iofl)), | |
48b4554a | 647 | 10*HZ)) { |
58037eb9 | 648 | dbg_hid("timeout waiting for ctrl or out queue to clear\n"); |
48b4554a JK |
649 | return -1; |
650 | } | |
1da177e4 | 651 | |
48b4554a JK |
652 | return 0; |
653 | } | |
53880546 | 654 | |
48b4554a JK |
655 | static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle) |
656 | { | |
657 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
658 | HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report, | |
659 | ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT); | |
660 | } | |
1da177e4 | 661 | |
48b4554a JK |
662 | static int hid_get_class_descriptor(struct usb_device *dev, int ifnum, |
663 | unsigned char type, void *buf, int size) | |
664 | { | |
665 | int result, retries = 4; | |
1da177e4 | 666 | |
48b4554a | 667 | memset(buf, 0, size); |
1da177e4 | 668 | |
48b4554a JK |
669 | do { |
670 | result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
671 | USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN, | |
672 | (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT); | |
673 | retries--; | |
674 | } while (result < size && retries); | |
675 | return result; | |
676 | } | |
940824b0 | 677 | |
d36b7d4c | 678 | static int usbhid_open(struct hid_device *hid) |
48b4554a | 679 | { |
933e3187 | 680 | struct usbhid_device *usbhid = hid->driver_data; |
e399396a | 681 | int res; |
b905811a | 682 | |
cf601774 DT |
683 | set_bit(HID_OPENED, &usbhid->iofl); |
684 | ||
e399396a DT |
685 | if (hid->quirks & HID_QUIRK_ALWAYS_POLL) |
686 | return 0; | |
687 | ||
688 | res = usb_autopm_get_interface(usbhid->intf); | |
689 | /* the device must be awake to reliably request remote wakeup */ | |
cf601774 DT |
690 | if (res < 0) { |
691 | clear_bit(HID_OPENED, &usbhid->iofl); | |
e399396a | 692 | return -EIO; |
cf601774 | 693 | } |
e399396a DT |
694 | |
695 | usbhid->intf->needs_remote_wakeup = 1; | |
696 | ||
697 | set_bit(HID_RESUME_RUNNING, &usbhid->iofl); | |
e399396a DT |
698 | set_bit(HID_IN_POLLING, &usbhid->iofl); |
699 | ||
700 | res = hid_start_in(hid); | |
701 | if (res) { | |
702 | if (res != -ENOSPC) { | |
703 | hid_io_error(hid); | |
704 | res = 0; | |
705 | } else { | |
706 | /* no use opening if resources are insufficient */ | |
707 | res = -EBUSY; | |
708 | clear_bit(HID_OPENED, &usbhid->iofl); | |
709 | clear_bit(HID_IN_POLLING, &usbhid->iofl); | |
710 | usbhid->intf->needs_remote_wakeup = 0; | |
711 | } | |
933e3187 | 712 | } |
e399396a DT |
713 | |
714 | usb_autopm_put_interface(usbhid->intf); | |
715 | ||
716 | /* | |
717 | * In case events are generated while nobody was listening, | |
718 | * some are released when the device is re-opened. | |
719 | * Wait 50 msec for the queue to empty before allowing events | |
720 | * to go through hid. | |
721 | */ | |
722 | if (res == 0) | |
723 | msleep(50); | |
724 | ||
725 | clear_bit(HID_RESUME_RUNNING, &usbhid->iofl); | |
a8c52b66 | 726 | return res; |
48b4554a | 727 | } |
a417a21e | 728 | |
d36b7d4c | 729 | static void usbhid_close(struct hid_device *hid) |
48b4554a JK |
730 | { |
731 | struct usbhid_device *usbhid = hid->driver_data; | |
eab9edd2 | 732 | |
e399396a DT |
733 | /* |
734 | * Make sure we don't restart data acquisition due to | |
735 | * a resumption we no longer care about by avoiding racing | |
736 | * with hid_start_in(). | |
0361a28d ON |
737 | */ |
738 | spin_lock_irq(&usbhid->lock); | |
e399396a | 739 | clear_bit(HID_OPENED, &usbhid->iofl); |
cf601774 DT |
740 | if (!(hid->quirks & HID_QUIRK_ALWAYS_POLL)) |
741 | clear_bit(HID_IN_POLLING, &usbhid->iofl); | |
e399396a DT |
742 | spin_unlock_irq(&usbhid->lock); |
743 | ||
cf601774 DT |
744 | if (hid->quirks & HID_QUIRK_ALWAYS_POLL) |
745 | return; | |
746 | ||
e399396a DT |
747 | hid_cancel_delayed_stuff(usbhid); |
748 | usb_kill_urb(usbhid->urbin); | |
749 | usbhid->intf->needs_remote_wakeup = 0; | |
48b4554a | 750 | } |
1d3e2023 | 751 | |
48b4554a JK |
752 | /* |
753 | * Initialize all reports | |
754 | */ | |
41ad5fba | 755 | |
48b4554a JK |
756 | void usbhid_init_reports(struct hid_device *hid) |
757 | { | |
758 | struct hid_report *report; | |
759 | struct usbhid_device *usbhid = hid->driver_data; | |
595e9276 | 760 | struct hid_report_enum *report_enum; |
48b4554a | 761 | int err, ret; |
41ad5fba | 762 | |
9143059f BT |
763 | report_enum = &hid->report_enum[HID_INPUT_REPORT]; |
764 | list_for_each_entry(report, &report_enum->report_list, list) | |
765 | usbhid_submit_report(hid, report, USB_DIR_IN); | |
5556feae | 766 | |
595e9276 BT |
767 | report_enum = &hid->report_enum[HID_FEATURE_REPORT]; |
768 | list_for_each_entry(report, &report_enum->report_list, list) | |
48b4554a | 769 | usbhid_submit_report(hid, report, USB_DIR_IN); |
4a1a4d8b | 770 | |
48b4554a JK |
771 | err = 0; |
772 | ret = usbhid_wait_io(hid); | |
773 | while (ret) { | |
774 | err |= ret; | |
775 | if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) | |
776 | usb_kill_urb(usbhid->urbctrl); | |
777 | if (test_bit(HID_OUT_RUNNING, &usbhid->iofl)) | |
778 | usb_kill_urb(usbhid->urbout); | |
779 | ret = usbhid_wait_io(hid); | |
780 | } | |
3f9b4076 | 781 | |
48b4554a | 782 | if (err) |
4291ee30 | 783 | hid_warn(hid, "timeout initializing reports\n"); |
48b4554a | 784 | } |
1da177e4 | 785 | |
713c8aad PZ |
786 | /* |
787 | * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01). | |
788 | */ | |
789 | static int hid_find_field_early(struct hid_device *hid, unsigned int page, | |
790 | unsigned int hid_code, struct hid_field **pfield) | |
791 | { | |
792 | struct hid_report *report; | |
793 | struct hid_field *field; | |
794 | struct hid_usage *usage; | |
795 | int i, j; | |
796 | ||
797 | list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { | |
798 | for (i = 0; i < report->maxfield; i++) { | |
799 | field = report->field[i]; | |
800 | for (j = 0; j < field->maxusage; j++) { | |
801 | usage = &field->usage[j]; | |
802 | if ((usage->hid & HID_USAGE_PAGE) == page && | |
803 | (usage->hid & 0xFFFF) == hid_code) { | |
804 | *pfield = field; | |
805 | return j; | |
806 | } | |
807 | } | |
808 | } | |
809 | } | |
810 | return -1; | |
811 | } | |
812 | ||
ddf64a3c | 813 | static void usbhid_set_leds(struct hid_device *hid) |
713c8aad PZ |
814 | { |
815 | struct hid_field *field; | |
816 | int offset; | |
817 | ||
818 | if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) { | |
819 | hid_set_field(field, offset, 0); | |
820 | usbhid_submit_report(hid, field->report, USB_DIR_OUT); | |
821 | } | |
822 | } | |
823 | ||
bf0964dc MH |
824 | /* |
825 | * Traverse the supplied list of reports and find the longest | |
826 | */ | |
282bfd4c JS |
827 | static void hid_find_max_report(struct hid_device *hid, unsigned int type, |
828 | unsigned int *max) | |
bf0964dc MH |
829 | { |
830 | struct hid_report *report; | |
282bfd4c | 831 | unsigned int size; |
bf0964dc MH |
832 | |
833 | list_for_each_entry(report, &hid->report_enum[type].report_list, list) { | |
efc7ce18 | 834 | size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered; |
bf0964dc MH |
835 | if (*max < size) |
836 | *max = size; | |
837 | } | |
838 | } | |
839 | ||
1da177e4 LT |
840 | static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid) |
841 | { | |
4916b3a5 JK |
842 | struct usbhid_device *usbhid = hid->driver_data; |
843 | ||
997ea58e | 844 | usbhid->inbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL, |
898089d0 | 845 | &usbhid->inbuf_dma); |
997ea58e | 846 | usbhid->outbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL, |
898089d0 | 847 | &usbhid->outbuf_dma); |
0ede76fc | 848 | usbhid->cr = kmalloc(sizeof(*usbhid->cr), GFP_KERNEL); |
997ea58e | 849 | usbhid->ctrlbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL, |
898089d0 JS |
850 | &usbhid->ctrlbuf_dma); |
851 | if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr || | |
852 | !usbhid->ctrlbuf) | |
1da177e4 LT |
853 | return -1; |
854 | ||
855 | return 0; | |
856 | } | |
857 | ||
b4dbde9d AO |
858 | static int usbhid_get_raw_report(struct hid_device *hid, |
859 | unsigned char report_number, __u8 *buf, size_t count, | |
860 | unsigned char report_type) | |
861 | { | |
862 | struct usbhid_device *usbhid = hid->driver_data; | |
863 | struct usb_device *dev = hid_to_usb_dev(hid); | |
864 | struct usb_interface *intf = usbhid->intf; | |
865 | struct usb_host_interface *interface = intf->cur_altsetting; | |
866 | int skipped_report_id = 0; | |
867 | int ret; | |
868 | ||
869 | /* Byte 0 is the report number. Report data starts at byte 1.*/ | |
870 | buf[0] = report_number; | |
871 | if (report_number == 0x0) { | |
872 | /* Offset the return buffer by 1, so that the report ID | |
873 | will remain in byte 0. */ | |
874 | buf++; | |
875 | count--; | |
876 | skipped_report_id = 1; | |
877 | } | |
878 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
879 | HID_REQ_GET_REPORT, | |
880 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
881 | ((report_type + 1) << 8) | report_number, | |
882 | interface->desc.bInterfaceNumber, buf, count, | |
883 | USB_CTRL_SET_TIMEOUT); | |
884 | ||
885 | /* count also the report id */ | |
886 | if (ret > 0 && skipped_report_id) | |
887 | ret++; | |
888 | ||
889 | return ret; | |
890 | } | |
891 | ||
975a6832 FP |
892 | static int usbhid_set_raw_report(struct hid_device *hid, unsigned int reportnum, |
893 | __u8 *buf, size_t count, unsigned char rtype) | |
894 | { | |
895 | struct usbhid_device *usbhid = hid->driver_data; | |
896 | struct usb_device *dev = hid_to_usb_dev(hid); | |
897 | struct usb_interface *intf = usbhid->intf; | |
898 | struct usb_host_interface *interface = intf->cur_altsetting; | |
899 | int ret, skipped_report_id = 0; | |
900 | ||
901 | /* Byte 0 is the report number. Report data starts at byte 1.*/ | |
e534a935 BT |
902 | if ((rtype == HID_OUTPUT_REPORT) && |
903 | (hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORT_ID)) | |
904 | buf[0] = 0; | |
905 | else | |
906 | buf[0] = reportnum; | |
907 | ||
975a6832 FP |
908 | if (buf[0] == 0x0) { |
909 | /* Don't send the Report ID */ | |
910 | buf++; | |
911 | count--; | |
912 | skipped_report_id = 1; | |
913 | } | |
914 | ||
915 | ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
916 | HID_REQ_SET_REPORT, | |
917 | USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
918 | ((rtype + 1) << 8) | reportnum, | |
919 | interface->desc.bInterfaceNumber, buf, count, | |
920 | USB_CTRL_SET_TIMEOUT); | |
921 | /* count also the report id, if this was a numbered report. */ | |
922 | if (ret > 0 && skipped_report_id) | |
923 | ret++; | |
924 | ||
925 | return ret; | |
926 | } | |
927 | ||
975a6832 FP |
928 | static int usbhid_output_report(struct hid_device *hid, __u8 *buf, size_t count) |
929 | { | |
930 | struct usbhid_device *usbhid = hid->driver_data; | |
931 | struct usb_device *dev = hid_to_usb_dev(hid); | |
932 | int actual_length, skipped_report_id = 0, ret; | |
933 | ||
934 | if (!usbhid->urbout) | |
ddea1af9 | 935 | return -ENOSYS; |
975a6832 FP |
936 | |
937 | if (buf[0] == 0x0) { | |
938 | /* Don't send the Report ID */ | |
939 | buf++; | |
940 | count--; | |
941 | skipped_report_id = 1; | |
942 | } | |
943 | ||
944 | ret = usb_interrupt_msg(dev, usbhid->urbout->pipe, | |
945 | buf, count, &actual_length, | |
946 | USB_CTRL_SET_TIMEOUT); | |
947 | /* return the number of bytes transferred */ | |
948 | if (ret == 0) { | |
949 | ret = actual_length; | |
950 | /* count also the report id */ | |
951 | if (skipped_report_id) | |
952 | ret++; | |
953 | } | |
954 | ||
955 | return ret; | |
956 | } | |
957 | ||
1da177e4 LT |
958 | static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid) |
959 | { | |
4916b3a5 JK |
960 | struct usbhid_device *usbhid = hid->driver_data; |
961 | ||
997ea58e DM |
962 | usb_free_coherent(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma); |
963 | usb_free_coherent(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma); | |
0ede76fc | 964 | kfree(usbhid->cr); |
997ea58e | 965 | usb_free_coherent(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma); |
1da177e4 LT |
966 | } |
967 | ||
c500c971 JS |
968 | static int usbhid_parse(struct hid_device *hid) |
969 | { | |
970 | struct usb_interface *intf = to_usb_interface(hid->dev.parent); | |
1da177e4 LT |
971 | struct usb_host_interface *interface = intf->cur_altsetting; |
972 | struct usb_device *dev = interface_to_usbdev (intf); | |
973 | struct hid_descriptor *hdesc; | |
2eb5dc30 | 974 | u32 quirks = 0; |
c500c971 | 975 | unsigned int rsize = 0; |
c5b7c7c3 | 976 | char *rdesc; |
c500c971 | 977 | int ret, n; |
1da177e4 | 978 | |
2eb5dc30 PW |
979 | quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor), |
980 | le16_to_cpu(dev->descriptor.idProduct)); | |
1da177e4 | 981 | |
6f4303fb JK |
982 | if (quirks & HID_QUIRK_IGNORE) |
983 | return -ENODEV; | |
984 | ||
0f28b55d AS |
985 | /* Many keyboards and mice don't like to be polled for reports, |
986 | * so we will always set the HID_QUIRK_NOGET flag for them. */ | |
987 | if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) { | |
988 | if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD || | |
989 | interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE) | |
990 | quirks |= HID_QUIRK_NOGET; | |
991 | } | |
992 | ||
c5b7c7c3 DT |
993 | if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) && |
994 | (!interface->desc.bNumEndpoints || | |
995 | usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) { | |
58037eb9 | 996 | dbg_hid("class descriptor not present\n"); |
c500c971 | 997 | return -ENODEV; |
1da177e4 LT |
998 | } |
999 | ||
c500c971 JS |
1000 | hid->version = le16_to_cpu(hdesc->bcdHID); |
1001 | hid->country = hdesc->bCountryCode; | |
1002 | ||
1da177e4 LT |
1003 | for (n = 0; n < hdesc->bNumDescriptors; n++) |
1004 | if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT) | |
1005 | rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength); | |
1006 | ||
1007 | if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) { | |
58037eb9 | 1008 | dbg_hid("weird size of report descriptor (%u)\n", rsize); |
c500c971 | 1009 | return -EINVAL; |
1da177e4 LT |
1010 | } |
1011 | ||
52150c78 JP |
1012 | rdesc = kmalloc(rsize, GFP_KERNEL); |
1013 | if (!rdesc) | |
c500c971 | 1014 | return -ENOMEM; |
1da177e4 | 1015 | |
854561b0 VP |
1016 | hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0); |
1017 | ||
c500c971 JS |
1018 | ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber, |
1019 | HID_DT_REPORT, rdesc, rsize); | |
1020 | if (ret < 0) { | |
58037eb9 | 1021 | dbg_hid("reading report descriptor failed\n"); |
1da177e4 | 1022 | kfree(rdesc); |
c500c971 | 1023 | goto err; |
1da177e4 LT |
1024 | } |
1025 | ||
c500c971 JS |
1026 | ret = hid_parse_report(hid, rdesc, rsize); |
1027 | kfree(rdesc); | |
1028 | if (ret) { | |
58037eb9 | 1029 | dbg_hid("parsing report descriptor failed\n"); |
c500c971 | 1030 | goto err; |
1da177e4 LT |
1031 | } |
1032 | ||
f5208997 | 1033 | hid->quirks |= quirks; |
1da177e4 | 1034 | |
c500c971 JS |
1035 | return 0; |
1036 | err: | |
1037 | return ret; | |
1038 | } | |
1039 | ||
1040 | static int usbhid_start(struct hid_device *hid) | |
1041 | { | |
1042 | struct usb_interface *intf = to_usb_interface(hid->dev.parent); | |
1043 | struct usb_host_interface *interface = intf->cur_altsetting; | |
1044 | struct usb_device *dev = interface_to_usbdev(intf); | |
3d5afd32 | 1045 | struct usbhid_device *usbhid = hid->driver_data; |
c500c971 JS |
1046 | unsigned int n, insize = 0; |
1047 | int ret; | |
1048 | ||
e3e14de5 JS |
1049 | clear_bit(HID_DISCONNECTED, &usbhid->iofl); |
1050 | ||
4916b3a5 JK |
1051 | usbhid->bufsize = HID_MIN_BUFFER_SIZE; |
1052 | hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize); | |
1053 | hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize); | |
1054 | hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize); | |
bf0964dc | 1055 | |
4916b3a5 JK |
1056 | if (usbhid->bufsize > HID_MAX_BUFFER_SIZE) |
1057 | usbhid->bufsize = HID_MAX_BUFFER_SIZE; | |
bf0964dc MH |
1058 | |
1059 | hid_find_max_report(hid, HID_INPUT_REPORT, &insize); | |
1060 | ||
1061 | if (insize > HID_MAX_BUFFER_SIZE) | |
1062 | insize = HID_MAX_BUFFER_SIZE; | |
1063 | ||
c500c971 JS |
1064 | if (hid_alloc_buffers(dev, hid)) { |
1065 | ret = -ENOMEM; | |
1da177e4 | 1066 | goto fail; |
f345c37c PS |
1067 | } |
1068 | ||
1da177e4 | 1069 | for (n = 0; n < interface->desc.bNumEndpoints; n++) { |
1da177e4 LT |
1070 | struct usb_endpoint_descriptor *endpoint; |
1071 | int pipe; | |
1072 | int interval; | |
1073 | ||
1074 | endpoint = &interface->endpoint[n].desc; | |
581a2739 | 1075 | if (!usb_endpoint_xfer_int(endpoint)) |
1da177e4 LT |
1076 | continue; |
1077 | ||
1da177e4 | 1078 | interval = endpoint->bInterval; |
1da177e4 | 1079 | |
f345c37c | 1080 | /* Some vendors give fullspeed interval on highspeed devides */ |
c500c971 | 1081 | if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL && |
f345c37c PS |
1082 | dev->speed == USB_SPEED_HIGH) { |
1083 | interval = fls(endpoint->bInterval*8); | |
52150c78 JP |
1084 | pr_info("%s: Fixing fullspeed to highspeed interval: %d -> %d\n", |
1085 | hid->name, endpoint->bInterval, interval); | |
f345c37c PS |
1086 | } |
1087 | ||
933bfe4d TJ |
1088 | /* Change the polling interval of mice and joysticks. */ |
1089 | switch (hid->collection->usage) { | |
1090 | case HID_GD_MOUSE: | |
1091 | if (hid_mousepoll_interval > 0) | |
1092 | interval = hid_mousepoll_interval; | |
1093 | break; | |
1094 | case HID_GD_JOYSTICK: | |
1095 | if (hid_jspoll_interval > 0) | |
1096 | interval = hid_jspoll_interval; | |
1097 | break; | |
1098 | } | |
05f091ab | 1099 | |
c500c971 | 1100 | ret = -ENOMEM; |
0f12aa03 | 1101 | if (usb_endpoint_dir_in(endpoint)) { |
4916b3a5 | 1102 | if (usbhid->urbin) |
1da177e4 | 1103 | continue; |
4916b3a5 | 1104 | if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL))) |
1da177e4 LT |
1105 | goto fail; |
1106 | pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress); | |
4916b3a5 | 1107 | usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize, |
1da177e4 | 1108 | hid_irq_in, hid, interval); |
4916b3a5 JK |
1109 | usbhid->urbin->transfer_dma = usbhid->inbuf_dma; |
1110 | usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1da177e4 | 1111 | } else { |
4916b3a5 | 1112 | if (usbhid->urbout) |
1da177e4 | 1113 | continue; |
4916b3a5 | 1114 | if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL))) |
1da177e4 LT |
1115 | goto fail; |
1116 | pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress); | |
4916b3a5 | 1117 | usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0, |
1da177e4 | 1118 | hid_irq_out, hid, interval); |
4916b3a5 JK |
1119 | usbhid->urbout->transfer_dma = usbhid->outbuf_dma; |
1120 | usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1da177e4 LT |
1121 | } |
1122 | } | |
1123 | ||
4916b3a5 | 1124 | usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL); |
c500c971 JS |
1125 | if (!usbhid->urbctrl) { |
1126 | ret = -ENOMEM; | |
1da177e4 | 1127 | goto fail; |
c500c971 | 1128 | } |
c5b7c7c3 | 1129 | |
4916b3a5 JK |
1130 | usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr, |
1131 | usbhid->ctrlbuf, 1, hid_ctrl, hid); | |
4916b3a5 | 1132 | usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma; |
0ede76fc | 1133 | usbhid->urbctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
c500c971 | 1134 | |
3d5afd32 | 1135 | set_bit(HID_STARTED, &usbhid->iofl); |
3d5afd32 | 1136 | |
0b750b3b JH |
1137 | if (hid->quirks & HID_QUIRK_ALWAYS_POLL) { |
1138 | ret = usb_autopm_get_interface(usbhid->intf); | |
1139 | if (ret) | |
1140 | goto fail; | |
28cbc863 | 1141 | set_bit(HID_IN_POLLING, &usbhid->iofl); |
0b750b3b JH |
1142 | usbhid->intf->needs_remote_wakeup = 1; |
1143 | ret = hid_start_in(hid); | |
1144 | if (ret) { | |
1145 | dev_err(&hid->dev, | |
1146 | "failed to start in urb: %d\n", ret); | |
1147 | } | |
1148 | usb_autopm_put_interface(usbhid->intf); | |
1149 | } | |
1150 | ||
08ef08ee AS |
1151 | /* Some keyboards don't work until their LEDs have been set. |
1152 | * Since BIOSes do set the LEDs, it must be safe for any device | |
1153 | * that supports the keyboard boot protocol. | |
3d61510f AS |
1154 | * In addition, enable remote wakeup by default for all keyboard |
1155 | * devices supporting the boot protocol. | |
08ef08ee AS |
1156 | */ |
1157 | if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT && | |
1158 | interface->desc.bInterfaceProtocol == | |
3d61510f | 1159 | USB_INTERFACE_PROTOCOL_KEYBOARD) { |
08ef08ee | 1160 | usbhid_set_leds(hid); |
3d61510f AS |
1161 | device_set_wakeup_enable(&dev->dev, 1); |
1162 | } | |
c500c971 | 1163 | return 0; |
1da177e4 LT |
1164 | |
1165 | fail: | |
4916b3a5 JK |
1166 | usb_free_urb(usbhid->urbin); |
1167 | usb_free_urb(usbhid->urbout); | |
1168 | usb_free_urb(usbhid->urbctrl); | |
e3e14de5 JS |
1169 | usbhid->urbin = NULL; |
1170 | usbhid->urbout = NULL; | |
1171 | usbhid->urbctrl = NULL; | |
22f675f3 | 1172 | hid_free_buffers(dev, hid); |
c500c971 | 1173 | return ret; |
1da177e4 LT |
1174 | } |
1175 | ||
c500c971 | 1176 | static void usbhid_stop(struct hid_device *hid) |
1da177e4 | 1177 | { |
c500c971 | 1178 | struct usbhid_device *usbhid = hid->driver_data; |
1da177e4 | 1179 | |
c500c971 | 1180 | if (WARN_ON(!usbhid)) |
1da177e4 LT |
1181 | return; |
1182 | ||
28cbc863 DT |
1183 | if (hid->quirks & HID_QUIRK_ALWAYS_POLL) { |
1184 | clear_bit(HID_IN_POLLING, &usbhid->iofl); | |
0b750b3b | 1185 | usbhid->intf->needs_remote_wakeup = 0; |
28cbc863 | 1186 | } |
0b750b3b | 1187 | |
3d5afd32 | 1188 | clear_bit(HID_STARTED, &usbhid->iofl); |
4371ea82 | 1189 | spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */ |
69626f23 | 1190 | set_bit(HID_DISCONNECTED, &usbhid->iofl); |
0361a28d | 1191 | spin_unlock_irq(&usbhid->lock); |
4916b3a5 JK |
1192 | usb_kill_urb(usbhid->urbin); |
1193 | usb_kill_urb(usbhid->urbout); | |
1194 | usb_kill_urb(usbhid->urbctrl); | |
1da177e4 | 1195 | |
0361a28d | 1196 | hid_cancel_delayed_stuff(usbhid); |
aef4e266 | 1197 | |
c500c971 JS |
1198 | hid->claimed = 0; |
1199 | ||
4916b3a5 JK |
1200 | usb_free_urb(usbhid->urbin); |
1201 | usb_free_urb(usbhid->urbctrl); | |
1202 | usb_free_urb(usbhid->urbout); | |
e3e14de5 JS |
1203 | usbhid->urbin = NULL; /* don't mess up next start */ |
1204 | usbhid->urbctrl = NULL; | |
1205 | usbhid->urbout = NULL; | |
1da177e4 | 1206 | |
be820975 | 1207 | hid_free_buffers(hid_to_usb_dev(hid), hid); |
1da177e4 LT |
1208 | } |
1209 | ||
0361a28d ON |
1210 | static int usbhid_power(struct hid_device *hid, int lvl) |
1211 | { | |
9a83563f | 1212 | struct usbhid_device *usbhid = hid->driver_data; |
0361a28d ON |
1213 | int r = 0; |
1214 | ||
1215 | switch (lvl) { | |
1216 | case PM_HINT_FULLON: | |
9a83563f | 1217 | r = usb_autopm_get_interface(usbhid->intf); |
0361a28d | 1218 | break; |
9a83563f | 1219 | |
0361a28d | 1220 | case PM_HINT_NORMAL: |
9a83563f | 1221 | usb_autopm_put_interface(usbhid->intf); |
0361a28d ON |
1222 | break; |
1223 | } | |
9a83563f | 1224 | |
0361a28d ON |
1225 | return r; |
1226 | } | |
1227 | ||
e90a6df8 HR |
1228 | static void usbhid_request(struct hid_device *hid, struct hid_report *rep, int reqtype) |
1229 | { | |
1230 | switch (reqtype) { | |
1231 | case HID_REQ_GET_REPORT: | |
1232 | usbhid_submit_report(hid, rep, USB_DIR_IN); | |
1233 | break; | |
1234 | case HID_REQ_SET_REPORT: | |
1235 | usbhid_submit_report(hid, rep, USB_DIR_OUT); | |
1236 | break; | |
1237 | } | |
1238 | } | |
1239 | ||
975a6832 FP |
1240 | static int usbhid_raw_request(struct hid_device *hid, unsigned char reportnum, |
1241 | __u8 *buf, size_t len, unsigned char rtype, | |
1242 | int reqtype) | |
1243 | { | |
1244 | switch (reqtype) { | |
1245 | case HID_REQ_GET_REPORT: | |
1246 | return usbhid_get_raw_report(hid, reportnum, buf, len, rtype); | |
1247 | case HID_REQ_SET_REPORT: | |
1248 | return usbhid_set_raw_report(hid, reportnum, buf, len, rtype); | |
1249 | default: | |
1250 | return -EIO; | |
1251 | } | |
1252 | } | |
1253 | ||
9684819b BT |
1254 | static int usbhid_idle(struct hid_device *hid, int report, int idle, |
1255 | int reqtype) | |
1256 | { | |
1257 | struct usb_device *dev = hid_to_usb_dev(hid); | |
1258 | struct usb_interface *intf = to_usb_interface(hid->dev.parent); | |
1259 | struct usb_host_interface *interface = intf->cur_altsetting; | |
1260 | int ifnum = interface->desc.bInterfaceNumber; | |
1261 | ||
1262 | if (reqtype != HID_REQ_SET_IDLE) | |
1263 | return -EINVAL; | |
1264 | ||
1265 | return hid_set_idle(dev, ifnum, report, idle); | |
1266 | } | |
1267 | ||
c500c971 JS |
1268 | static struct hid_ll_driver usb_hid_driver = { |
1269 | .parse = usbhid_parse, | |
1270 | .start = usbhid_start, | |
1271 | .stop = usbhid_stop, | |
1272 | .open = usbhid_open, | |
1273 | .close = usbhid_close, | |
0361a28d | 1274 | .power = usbhid_power, |
e90a6df8 | 1275 | .request = usbhid_request, |
3373443b | 1276 | .wait = usbhid_wait_io, |
975a6832 FP |
1277 | .raw_request = usbhid_raw_request, |
1278 | .output_report = usbhid_output_report, | |
9684819b | 1279 | .idle = usbhid_idle, |
c500c971 JS |
1280 | }; |
1281 | ||
c4c259bc | 1282 | static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id) |
1da177e4 | 1283 | { |
131d3a7a | 1284 | struct usb_host_interface *interface = intf->cur_altsetting; |
c500c971 | 1285 | struct usb_device *dev = interface_to_usbdev(intf); |
3d5afd32 | 1286 | struct usbhid_device *usbhid; |
1da177e4 | 1287 | struct hid_device *hid; |
131d3a7a | 1288 | unsigned int n, has_in = 0; |
c500c971 JS |
1289 | size_t len; |
1290 | int ret; | |
1da177e4 | 1291 | |
58037eb9 | 1292 | dbg_hid("HID probe called for ifnum %d\n", |
1da177e4 LT |
1293 | intf->altsetting->desc.bInterfaceNumber); |
1294 | ||
131d3a7a JS |
1295 | for (n = 0; n < interface->desc.bNumEndpoints; n++) |
1296 | if (usb_endpoint_is_int_in(&interface->endpoint[n].desc)) | |
1297 | has_in++; | |
1298 | if (!has_in) { | |
4291ee30 | 1299 | hid_err(intf, "couldn't find an input interrupt endpoint\n"); |
131d3a7a JS |
1300 | return -ENODEV; |
1301 | } | |
1302 | ||
c500c971 JS |
1303 | hid = hid_allocate_device(); |
1304 | if (IS_ERR(hid)) | |
1305 | return PTR_ERR(hid); | |
1da177e4 LT |
1306 | |
1307 | usb_set_intfdata(intf, hid); | |
c500c971 | 1308 | hid->ll_driver = &usb_hid_driver; |
76483cf4 | 1309 | hid->ff_init = hid_pidff_init; |
c500c971 | 1310 | #ifdef CONFIG_USB_HIDDEV |
93c10132 | 1311 | hid->hiddev_connect = hiddev_connect; |
c4c259bc | 1312 | hid->hiddev_disconnect = hiddev_disconnect; |
c500c971 JS |
1313 | hid->hiddev_hid_event = hiddev_hid_event; |
1314 | hid->hiddev_report_event = hiddev_report_event; | |
1315 | #endif | |
1316 | hid->dev.parent = &intf->dev; | |
1317 | hid->bus = BUS_USB; | |
1318 | hid->vendor = le16_to_cpu(dev->descriptor.idVendor); | |
1319 | hid->product = le16_to_cpu(dev->descriptor.idProduct); | |
1320 | hid->name[0] = 0; | |
b5e5a37e | 1321 | hid->quirks = usbhid_lookup_quirk(hid->vendor, hid->product); |
a73a6370 JS |
1322 | if (intf->cur_altsetting->desc.bInterfaceProtocol == |
1323 | USB_INTERFACE_PROTOCOL_MOUSE) | |
1324 | hid->type = HID_TYPE_USBMOUSE; | |
6dc1418e TS |
1325 | else if (intf->cur_altsetting->desc.bInterfaceProtocol == 0) |
1326 | hid->type = HID_TYPE_USBNONE; | |
1da177e4 | 1327 | |
c500c971 JS |
1328 | if (dev->manufacturer) |
1329 | strlcpy(hid->name, dev->manufacturer, sizeof(hid->name)); | |
1da177e4 | 1330 | |
c500c971 JS |
1331 | if (dev->product) { |
1332 | if (dev->manufacturer) | |
1333 | strlcat(hid->name, " ", sizeof(hid->name)); | |
1334 | strlcat(hid->name, dev->product, sizeof(hid->name)); | |
1da177e4 LT |
1335 | } |
1336 | ||
c500c971 JS |
1337 | if (!strlen(hid->name)) |
1338 | snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x", | |
1339 | le16_to_cpu(dev->descriptor.idVendor), | |
1340 | le16_to_cpu(dev->descriptor.idProduct)); | |
1da177e4 | 1341 | |
c500c971 JS |
1342 | usb_make_path(dev, hid->phys, sizeof(hid->phys)); |
1343 | strlcat(hid->phys, "/input", sizeof(hid->phys)); | |
1344 | len = strlen(hid->phys); | |
1345 | if (len < sizeof(hid->phys) - 1) | |
1346 | snprintf(hid->phys + len, sizeof(hid->phys) - len, | |
1347 | "%d", intf->altsetting[0].desc.bInterfaceNumber); | |
1348 | ||
1349 | if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0) | |
1350 | hid->uniq[0] = 0; | |
1da177e4 | 1351 | |
3d5afd32 JS |
1352 | usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL); |
1353 | if (usbhid == NULL) { | |
1354 | ret = -ENOMEM; | |
1355 | goto err; | |
1356 | } | |
1357 | ||
1358 | hid->driver_data = usbhid; | |
1359 | usbhid->hid = hid; | |
57ab12e4 JK |
1360 | usbhid->intf = intf; |
1361 | usbhid->ifnum = interface->desc.bInterfaceNumber; | |
3d5afd32 | 1362 | |
fde4e2f7 AS |
1363 | init_waitqueue_head(&usbhid->wait); |
1364 | INIT_WORK(&usbhid->reset_work, hid_reset); | |
fde4e2f7 AS |
1365 | setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid); |
1366 | spin_lock_init(&usbhid->lock); | |
1367 | ||
85cdaf52 JS |
1368 | ret = hid_add_device(hid); |
1369 | if (ret) { | |
d458a9df | 1370 | if (ret != -ENODEV) |
4291ee30 | 1371 | hid_err(intf, "can't add hid device: %d\n", ret); |
3d5afd32 | 1372 | goto err_free; |
85cdaf52 | 1373 | } |
c500c971 JS |
1374 | |
1375 | return 0; | |
3d5afd32 JS |
1376 | err_free: |
1377 | kfree(usbhid); | |
c500c971 JS |
1378 | err: |
1379 | hid_destroy_device(hid); | |
85cdaf52 | 1380 | return ret; |
1da177e4 LT |
1381 | } |
1382 | ||
c4c259bc | 1383 | static void usbhid_disconnect(struct usb_interface *intf) |
c500c971 JS |
1384 | { |
1385 | struct hid_device *hid = usb_get_intfdata(intf); | |
3d5afd32 | 1386 | struct usbhid_device *usbhid; |
c500c971 JS |
1387 | |
1388 | if (WARN_ON(!hid)) | |
1389 | return; | |
1390 | ||
3d5afd32 | 1391 | usbhid = hid->driver_data; |
46df9ded RA |
1392 | spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */ |
1393 | set_bit(HID_DISCONNECTED, &usbhid->iofl); | |
1394 | spin_unlock_irq(&usbhid->lock); | |
c500c971 | 1395 | hid_destroy_device(hid); |
3d5afd32 | 1396 | kfree(usbhid); |
c500c971 JS |
1397 | } |
1398 | ||
0361a28d ON |
1399 | static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid) |
1400 | { | |
1401 | del_timer_sync(&usbhid->io_retry); | |
0361a28d ON |
1402 | cancel_work_sync(&usbhid->reset_work); |
1403 | } | |
1404 | ||
1405 | static void hid_cease_io(struct usbhid_device *usbhid) | |
1406 | { | |
fad9fbe8 | 1407 | del_timer_sync(&usbhid->io_retry); |
0361a28d ON |
1408 | usb_kill_urb(usbhid->urbin); |
1409 | usb_kill_urb(usbhid->urbctrl); | |
1410 | usb_kill_urb(usbhid->urbout); | |
0361a28d ON |
1411 | } |
1412 | ||
972e6a99 AS |
1413 | static void hid_restart_io(struct hid_device *hid) |
1414 | { | |
1415 | struct usbhid_device *usbhid = hid->driver_data; | |
1416 | int clear_halt = test_bit(HID_CLEAR_HALT, &usbhid->iofl); | |
1417 | int reset_pending = test_bit(HID_RESET_PENDING, &usbhid->iofl); | |
1418 | ||
1419 | spin_lock_irq(&usbhid->lock); | |
1420 | clear_bit(HID_SUSPENDED, &usbhid->iofl); | |
1421 | usbhid_mark_busy(usbhid); | |
1422 | ||
1423 | if (clear_halt || reset_pending) | |
1424 | schedule_work(&usbhid->reset_work); | |
1425 | usbhid->retry_delay = 0; | |
1426 | spin_unlock_irq(&usbhid->lock); | |
1427 | ||
1428 | if (reset_pending || !test_bit(HID_STARTED, &usbhid->iofl)) | |
1429 | return; | |
1430 | ||
1431 | if (!clear_halt) { | |
1432 | if (hid_start_in(hid) < 0) | |
1433 | hid_io_error(hid); | |
1434 | } | |
1435 | ||
1436 | spin_lock_irq(&usbhid->lock); | |
1437 | if (usbhid->urbout && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)) | |
1438 | usbhid_restart_out_queue(usbhid); | |
1439 | if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) | |
1440 | usbhid_restart_ctrl_queue(usbhid); | |
1441 | spin_unlock_irq(&usbhid->lock); | |
1442 | } | |
1443 | ||
ae2f0074 JK |
1444 | /* Treat USB reset pretty much the same as suspend/resume */ |
1445 | static int hid_pre_reset(struct usb_interface *intf) | |
1446 | { | |
1447 | struct hid_device *hid = usb_get_intfdata(intf); | |
1448 | struct usbhid_device *usbhid = hid->driver_data; | |
1449 | ||
1450 | spin_lock_irq(&usbhid->lock); | |
1451 | set_bit(HID_RESET_PENDING, &usbhid->iofl); | |
1452 | spin_unlock_irq(&usbhid->lock); | |
1453 | hid_cease_io(usbhid); | |
1454 | ||
1455 | return 0; | |
1456 | } | |
1457 | ||
1458 | /* Same routine used for post_reset and reset_resume */ | |
1459 | static int hid_post_reset(struct usb_interface *intf) | |
1460 | { | |
1461 | struct usb_device *dev = interface_to_usbdev (intf); | |
1462 | struct hid_device *hid = usb_get_intfdata(intf); | |
1463 | struct usbhid_device *usbhid = hid->driver_data; | |
dc3c78e4 | 1464 | struct usb_host_interface *interface = intf->cur_altsetting; |
ae2f0074 | 1465 | int status; |
dc3c78e4 SH |
1466 | char *rdesc; |
1467 | ||
1468 | /* Fetch and examine the HID report descriptor. If this | |
1469 | * has changed, then rebind. Since usbcore's check of the | |
1470 | * configuration descriptors passed, we already know that | |
1471 | * the size of the HID report descriptor has not changed. | |
1472 | */ | |
86e6b77e | 1473 | rdesc = kmalloc(hid->dev_rsize, GFP_KERNEL); |
52150c78 | 1474 | if (!rdesc) |
c60fa555 | 1475 | return -ENOMEM; |
52150c78 | 1476 | |
dc3c78e4 SH |
1477 | status = hid_get_class_descriptor(dev, |
1478 | interface->desc.bInterfaceNumber, | |
86e6b77e | 1479 | HID_DT_REPORT, rdesc, hid->dev_rsize); |
dc3c78e4 SH |
1480 | if (status < 0) { |
1481 | dbg_hid("reading report descriptor failed (post_reset)\n"); | |
1482 | kfree(rdesc); | |
c60fa555 | 1483 | return status; |
dc3c78e4 | 1484 | } |
86e6b77e | 1485 | status = memcmp(rdesc, hid->dev_rdesc, hid->dev_rsize); |
dc3c78e4 SH |
1486 | kfree(rdesc); |
1487 | if (status != 0) { | |
1488 | dbg_hid("report descriptor changed\n"); | |
c60fa555 | 1489 | return -EPERM; |
dc3c78e4 | 1490 | } |
70fa9f2e | 1491 | |
972e6a99 | 1492 | /* No need to do another reset or clear a halted endpoint */ |
ae2f0074 JK |
1493 | spin_lock_irq(&usbhid->lock); |
1494 | clear_bit(HID_RESET_PENDING, &usbhid->iofl); | |
972e6a99 | 1495 | clear_bit(HID_CLEAR_HALT, &usbhid->iofl); |
ae2f0074 JK |
1496 | spin_unlock_irq(&usbhid->lock); |
1497 | hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0); | |
972e6a99 AS |
1498 | |
1499 | hid_restart_io(hid); | |
ae2f0074 JK |
1500 | |
1501 | return 0; | |
1502 | } | |
1503 | ||
0f6f1407 | 1504 | #ifdef CONFIG_PM |
eb055fd0 AS |
1505 | static int hid_resume_common(struct hid_device *hid, bool driver_suspended) |
1506 | { | |
972e6a99 | 1507 | int status = 0; |
eb055fd0 | 1508 | |
972e6a99 | 1509 | hid_restart_io(hid); |
eb055fd0 AS |
1510 | if (driver_suspended && hid->driver && hid->driver->resume) |
1511 | status = hid->driver->resume(hid); | |
1512 | return status; | |
1513 | } | |
1514 | ||
27d72e85 | 1515 | static int hid_suspend(struct usb_interface *intf, pm_message_t message) |
1da177e4 | 1516 | { |
0361a28d | 1517 | struct hid_device *hid = usb_get_intfdata(intf); |
4916b3a5 | 1518 | struct usbhid_device *usbhid = hid->driver_data; |
37093b70 | 1519 | int status = 0; |
eb055fd0 | 1520 | bool driver_suspended = false; |
bfde79cb | 1521 | unsigned int ledcount; |
1da177e4 | 1522 | |
5b1b0b81 | 1523 | if (PMSG_IS_AUTO(message)) { |
bfde79cb | 1524 | ledcount = hidinput_count_leds(hid); |
0361a28d ON |
1525 | spin_lock_irq(&usbhid->lock); /* Sync with error handler */ |
1526 | if (!test_bit(HID_RESET_PENDING, &usbhid->iofl) | |
1527 | && !test_bit(HID_CLEAR_HALT, &usbhid->iofl) | |
1528 | && !test_bit(HID_OUT_RUNNING, &usbhid->iofl) | |
1529 | && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl) | |
1530 | && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl) | |
bfde79cb | 1531 | && (!ledcount || ignoreled)) |
0361a28d | 1532 | { |
f2b5264d | 1533 | set_bit(HID_SUSPENDED, &usbhid->iofl); |
0361a28d | 1534 | spin_unlock_irq(&usbhid->lock); |
6a740aa4 BP |
1535 | if (hid->driver && hid->driver->suspend) { |
1536 | status = hid->driver->suspend(hid, message); | |
1537 | if (status < 0) | |
eb055fd0 | 1538 | goto failed; |
6a740aa4 | 1539 | } |
eb055fd0 | 1540 | driver_suspended = true; |
0361a28d ON |
1541 | } else { |
1542 | usbhid_mark_busy(usbhid); | |
1543 | spin_unlock_irq(&usbhid->lock); | |
1544 | return -EBUSY; | |
1545 | } | |
3d5afd32 | 1546 | |
0361a28d | 1547 | } else { |
37093b70 ML |
1548 | /* TODO: resume() might need to handle suspend failure */ |
1549 | if (hid->driver && hid->driver->suspend) | |
6a740aa4 | 1550 | status = hid->driver->suspend(hid, message); |
eb055fd0 | 1551 | driver_suspended = true; |
0361a28d | 1552 | spin_lock_irq(&usbhid->lock); |
f2b5264d | 1553 | set_bit(HID_SUSPENDED, &usbhid->iofl); |
0361a28d | 1554 | spin_unlock_irq(&usbhid->lock); |
37093b70 | 1555 | if (usbhid_wait_io(hid) < 0) |
eb055fd0 | 1556 | status = -EIO; |
0361a28d ON |
1557 | } |
1558 | ||
0361a28d ON |
1559 | hid_cancel_delayed_stuff(usbhid); |
1560 | hid_cease_io(usbhid); | |
1561 | ||
5b1b0b81 | 1562 | if (PMSG_IS_AUTO(message) && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) { |
0361a28d | 1563 | /* lost race against keypresses */ |
eb055fd0 AS |
1564 | status = -EBUSY; |
1565 | goto failed; | |
0361a28d | 1566 | } |
1da177e4 | 1567 | dev_dbg(&intf->dev, "suspend\n"); |
37093b70 | 1568 | return status; |
eb055fd0 AS |
1569 | |
1570 | failed: | |
1571 | hid_resume_common(hid, driver_suspended); | |
1572 | return status; | |
1da177e4 LT |
1573 | } |
1574 | ||
1575 | static int hid_resume(struct usb_interface *intf) | |
1576 | { | |
1577 | struct hid_device *hid = usb_get_intfdata (intf); | |
1578 | int status; | |
1579 | ||
eb055fd0 | 1580 | status = hid_resume_common(hid, true); |
1da177e4 | 1581 | dev_dbg(&intf->dev, "resume status %d\n", status); |
f07600cf | 1582 | return 0; |
df9a1f48 AS |
1583 | } |
1584 | ||
378a0ede | 1585 | static int hid_reset_resume(struct usb_interface *intf) |
df9a1f48 | 1586 | { |
378a0ede | 1587 | struct hid_device *hid = usb_get_intfdata(intf); |
6a740aa4 | 1588 | int status; |
df9a1f48 | 1589 | |
6a740aa4 BP |
1590 | status = hid_post_reset(intf); |
1591 | if (status >= 0 && hid->driver && hid->driver->reset_resume) { | |
1592 | int ret = hid->driver->reset_resume(hid); | |
1593 | if (ret < 0) | |
1594 | status = ret; | |
1595 | } | |
1596 | return status; | |
df9a1f48 AS |
1597 | } |
1598 | ||
ae2f0074 | 1599 | #endif /* CONFIG_PM */ |
df9a1f48 | 1600 | |
d67dec5b | 1601 | static const struct usb_device_id hid_usb_ids[] = { |
1da177e4 LT |
1602 | { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS, |
1603 | .bInterfaceClass = USB_INTERFACE_CLASS_HID }, | |
1604 | { } /* Terminating entry */ | |
1605 | }; | |
1606 | ||
1607 | MODULE_DEVICE_TABLE (usb, hid_usb_ids); | |
1608 | ||
1609 | static struct usb_driver hid_driver = { | |
1da177e4 | 1610 | .name = "usbhid", |
c4c259bc JK |
1611 | .probe = usbhid_probe, |
1612 | .disconnect = usbhid_disconnect, | |
0f6f1407 | 1613 | #ifdef CONFIG_PM |
1da177e4 LT |
1614 | .suspend = hid_suspend, |
1615 | .resume = hid_resume, | |
378a0ede | 1616 | .reset_resume = hid_reset_resume, |
0f6f1407 | 1617 | #endif |
df9a1f48 AS |
1618 | .pre_reset = hid_pre_reset, |
1619 | .post_reset = hid_post_reset, | |
1da177e4 | 1620 | .id_table = hid_usb_ids, |
933e3187 | 1621 | .supports_autosuspend = 1, |
1da177e4 LT |
1622 | }; |
1623 | ||
8fe294ca GC |
1624 | struct usb_interface *usbhid_find_interface(int minor) |
1625 | { | |
1626 | return usb_find_interface(&hid_driver, minor); | |
1627 | } | |
1628 | ||
1da177e4 LT |
1629 | static int __init hid_init(void) |
1630 | { | |
0361a28d ON |
1631 | int retval = -ENOMEM; |
1632 | ||
876b9276 PW |
1633 | retval = usbhid_quirks_init(quirks_param); |
1634 | if (retval) | |
1635 | goto usbhid_quirks_init_fail; | |
1da177e4 LT |
1636 | retval = usb_register(&hid_driver); |
1637 | if (retval) | |
1638 | goto usb_register_fail; | |
52150c78 | 1639 | pr_info(KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
1da177e4 LT |
1640 | |
1641 | return 0; | |
1642 | usb_register_fail: | |
876b9276 PW |
1643 | usbhid_quirks_exit(); |
1644 | usbhid_quirks_init_fail: | |
1da177e4 LT |
1645 | return retval; |
1646 | } | |
1647 | ||
1648 | static void __exit hid_exit(void) | |
1649 | { | |
1650 | usb_deregister(&hid_driver); | |
876b9276 | 1651 | usbhid_quirks_exit(); |
1da177e4 LT |
1652 | } |
1653 | ||
1654 | module_init(hid_init); | |
1655 | module_exit(hid_exit); | |
1656 | ||
88adb72b JK |
1657 | MODULE_AUTHOR("Andreas Gal"); |
1658 | MODULE_AUTHOR("Vojtech Pavlik"); | |
1659 | MODULE_AUTHOR("Jiri Kosina"); | |
1da177e4 | 1660 | MODULE_DESCRIPTION(DRIVER_DESC); |
7021b600 | 1661 | MODULE_LICENSE("GPL"); |