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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 LT |
45 | #define DRIVER_DESC "USB HID core driver" |
46 | #define DRIVER_LICENSE "GPL" | |
47 | ||
1da177e4 LT |
48 | /* |
49 | * Module parameters. | |
50 | */ | |
51 | ||
52 | static unsigned int hid_mousepoll_interval; | |
53 | module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644); | |
54 | MODULE_PARM_DESC(mousepoll, "Polling interval of mice"); | |
55 | ||
0361a28d ON |
56 | static unsigned int ignoreled; |
57 | module_param_named(ignoreled, ignoreled, uint, 0644); | |
58 | MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds"); | |
59 | ||
876b9276 | 60 | /* Quirks specified at module load time */ |
81ba9926 | 61 | static char *quirks_param[MAX_USBHID_BOOT_QUIRKS]; |
876b9276 PW |
62 | module_param_array_named(quirks, quirks_param, charp, NULL, 0444); |
63 | MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying " | |
64 | " quirks=vendorID:productID:quirks" | |
65 | " where vendorID, productID, and quirks are all in" | |
66 | " 0x-prefixed hex"); | |
1da177e4 | 67 | /* |
48b4554a | 68 | * Input submission and I/O error handler. |
1da177e4 | 69 | */ |
0361a28d | 70 | static DEFINE_MUTEX(hid_open_mut); |
1da177e4 | 71 | |
48b4554a | 72 | static void hid_io_error(struct hid_device *hid); |
0361a28d ON |
73 | static int hid_submit_out(struct hid_device *hid); |
74 | static int hid_submit_ctrl(struct hid_device *hid); | |
75 | static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid); | |
48b4554a JK |
76 | |
77 | /* Start up the input URB */ | |
78 | static int hid_start_in(struct hid_device *hid) | |
1da177e4 | 79 | { |
1da177e4 | 80 | unsigned long flags; |
48b4554a JK |
81 | int rc = 0; |
82 | struct usbhid_device *usbhid = hid->driver_data; | |
1da177e4 | 83 | |
0361a28d | 84 | spin_lock_irqsave(&usbhid->lock, flags); |
0b750b3b | 85 | if ((hid->open > 0 || hid->quirks & HID_QUIRK_ALWAYS_POLL) && |
69626f23 | 86 | !test_bit(HID_DISCONNECTED, &usbhid->iofl) && |
f2b5264d | 87 | !test_bit(HID_SUSPENDED, &usbhid->iofl) && |
48b4554a JK |
88 | !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) { |
89 | rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC); | |
a8c52b66 | 90 | if (rc != 0) { |
48b4554a | 91 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
a8c52b66 ON |
92 | if (rc == -ENOSPC) |
93 | set_bit(HID_NO_BANDWIDTH, &usbhid->iofl); | |
94 | } else { | |
95 | clear_bit(HID_NO_BANDWIDTH, &usbhid->iofl); | |
96 | } | |
1da177e4 | 97 | } |
0361a28d | 98 | spin_unlock_irqrestore(&usbhid->lock, flags); |
48b4554a | 99 | return rc; |
1da177e4 LT |
100 | } |
101 | ||
48b4554a JK |
102 | /* I/O retry timer routine */ |
103 | static void hid_retry_timeout(unsigned long _hid) | |
1da177e4 | 104 | { |
48b4554a | 105 | struct hid_device *hid = (struct hid_device *) _hid; |
4916b3a5 | 106 | struct usbhid_device *usbhid = hid->driver_data; |
1da177e4 | 107 | |
48b4554a JK |
108 | dev_dbg(&usbhid->intf->dev, "retrying intr urb\n"); |
109 | if (hid_start_in(hid)) | |
110 | hid_io_error(hid); | |
1da177e4 LT |
111 | } |
112 | ||
48b4554a JK |
113 | /* Workqueue routine to reset the device or clear a halt */ |
114 | static void hid_reset(struct work_struct *work) | |
1da177e4 | 115 | { |
48b4554a JK |
116 | struct usbhid_device *usbhid = |
117 | container_of(work, struct usbhid_device, reset_work); | |
118 | struct hid_device *hid = usbhid->hid; | |
8f507ef5 | 119 | int rc; |
1da177e4 | 120 | |
48b4554a JK |
121 | if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) { |
122 | dev_dbg(&usbhid->intf->dev, "clear halt\n"); | |
123 | rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe); | |
124 | clear_bit(HID_CLEAR_HALT, &usbhid->iofl); | |
011b15df | 125 | if (rc == 0) { |
8f507ef5 AS |
126 | hid_start_in(hid); |
127 | } else { | |
128 | dev_dbg(&usbhid->intf->dev, | |
129 | "clear-halt failed: %d\n", rc); | |
130 | set_bit(HID_RESET_PENDING, &usbhid->iofl); | |
1da177e4 | 131 | } |
1da177e4 LT |
132 | } |
133 | ||
8f507ef5 AS |
134 | if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) { |
135 | dev_dbg(&usbhid->intf->dev, "resetting device\n"); | |
136 | usb_queue_reset_device(usbhid->intf); | |
1da177e4 | 137 | } |
1da177e4 LT |
138 | } |
139 | ||
48b4554a JK |
140 | /* Main I/O error handler */ |
141 | static void hid_io_error(struct hid_device *hid) | |
dde5845a | 142 | { |
48b4554a JK |
143 | unsigned long flags; |
144 | struct usbhid_device *usbhid = hid->driver_data; | |
dde5845a | 145 | |
0361a28d | 146 | spin_lock_irqsave(&usbhid->lock, flags); |
dde5845a | 147 | |
48b4554a | 148 | /* Stop when disconnected */ |
69626f23 | 149 | if (test_bit(HID_DISCONNECTED, &usbhid->iofl)) |
48b4554a | 150 | goto done; |
dde5845a | 151 | |
5e2a55f2 AS |
152 | /* If it has been a while since the last error, we'll assume |
153 | * this a brand new error and reset the retry timeout. */ | |
154 | if (time_after(jiffies, usbhid->stop_retry + HZ/2)) | |
155 | usbhid->retry_delay = 0; | |
156 | ||
48b4554a JK |
157 | /* When an error occurs, retry at increasing intervals */ |
158 | if (usbhid->retry_delay == 0) { | |
159 | usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */ | |
160 | usbhid->stop_retry = jiffies + msecs_to_jiffies(1000); | |
161 | } else if (usbhid->retry_delay < 100) | |
162 | usbhid->retry_delay *= 2; | |
dde5845a | 163 | |
48b4554a | 164 | if (time_after(jiffies, usbhid->stop_retry)) { |
4916b3a5 | 165 | |
a8c52b66 ON |
166 | /* Retries failed, so do a port reset unless we lack bandwidth*/ |
167 | if (test_bit(HID_NO_BANDWIDTH, &usbhid->iofl) | |
168 | && !test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) { | |
169 | ||
48b4554a JK |
170 | schedule_work(&usbhid->reset_work); |
171 | goto done; | |
172 | } | |
1da177e4 LT |
173 | } |
174 | ||
48b4554a JK |
175 | mod_timer(&usbhid->io_retry, |
176 | jiffies + msecs_to_jiffies(usbhid->retry_delay)); | |
177 | done: | |
0361a28d ON |
178 | spin_unlock_irqrestore(&usbhid->lock, flags); |
179 | } | |
180 | ||
181 | static void usbhid_mark_busy(struct usbhid_device *usbhid) | |
182 | { | |
183 | struct usb_interface *intf = usbhid->intf; | |
184 | ||
185 | usb_mark_last_busy(interface_to_usbdev(intf)); | |
186 | } | |
187 | ||
188 | static int usbhid_restart_out_queue(struct usbhid_device *usbhid) | |
189 | { | |
190 | struct hid_device *hid = usb_get_intfdata(usbhid->intf); | |
191 | int kicked; | |
f0befcd6 | 192 | int r; |
0361a28d | 193 | |
d4150c8f AS |
194 | if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) || |
195 | test_bit(HID_SUSPENDED, &usbhid->iofl)) | |
0361a28d ON |
196 | return 0; |
197 | ||
198 | if ((kicked = (usbhid->outhead != usbhid->outtail))) { | |
6cc203d7 | 199 | hid_dbg(hid, "Kicking head %d tail %d", usbhid->outhead, usbhid->outtail); |
f0befcd6 | 200 | |
01a7c984 | 201 | /* Try to wake up from autosuspend... */ |
f0befcd6 DK |
202 | r = usb_autopm_get_interface_async(usbhid->intf); |
203 | if (r < 0) | |
204 | return r; | |
01a7c984 AS |
205 | |
206 | /* | |
207 | * If still suspended, don't submit. Submission will | |
208 | * occur if/when resume drains the queue. | |
209 | */ | |
f2b5264d | 210 | if (test_bit(HID_SUSPENDED, &usbhid->iofl)) { |
01a7c984 AS |
211 | usb_autopm_put_interface_no_suspend(usbhid->intf); |
212 | return r; | |
213 | } | |
214 | ||
f0befcd6 DK |
215 | /* Asynchronously flush queue. */ |
216 | set_bit(HID_OUT_RUNNING, &usbhid->iofl); | |
0361a28d ON |
217 | if (hid_submit_out(hid)) { |
218 | clear_bit(HID_OUT_RUNNING, &usbhid->iofl); | |
f0befcd6 | 219 | usb_autopm_put_interface_async(usbhid->intf); |
0361a28d | 220 | } |
f0befcd6 | 221 | wake_up(&usbhid->wait); |
0361a28d ON |
222 | } |
223 | return kicked; | |
224 | } | |
225 | ||
226 | static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid) | |
227 | { | |
228 | struct hid_device *hid = usb_get_intfdata(usbhid->intf); | |
229 | int kicked; | |
f0befcd6 | 230 | int r; |
0361a28d ON |
231 | |
232 | WARN_ON(hid == NULL); | |
d4150c8f AS |
233 | if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) || |
234 | test_bit(HID_SUSPENDED, &usbhid->iofl)) | |
0361a28d ON |
235 | return 0; |
236 | ||
237 | if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) { | |
6cc203d7 | 238 | hid_dbg(hid, "Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail); |
f0befcd6 | 239 | |
01a7c984 | 240 | /* Try to wake up from autosuspend... */ |
f0befcd6 DK |
241 | r = usb_autopm_get_interface_async(usbhid->intf); |
242 | if (r < 0) | |
243 | return r; | |
01a7c984 AS |
244 | |
245 | /* | |
246 | * If still suspended, don't submit. Submission will | |
247 | * occur if/when resume drains the queue. | |
248 | */ | |
f2b5264d | 249 | if (test_bit(HID_SUSPENDED, &usbhid->iofl)) { |
01a7c984 AS |
250 | usb_autopm_put_interface_no_suspend(usbhid->intf); |
251 | return r; | |
252 | } | |
253 | ||
f0befcd6 DK |
254 | /* Asynchronously flush queue. */ |
255 | set_bit(HID_CTRL_RUNNING, &usbhid->iofl); | |
0361a28d ON |
256 | if (hid_submit_ctrl(hid)) { |
257 | clear_bit(HID_CTRL_RUNNING, &usbhid->iofl); | |
f0befcd6 | 258 | usb_autopm_put_interface_async(usbhid->intf); |
0361a28d | 259 | } |
f0befcd6 | 260 | wake_up(&usbhid->wait); |
0361a28d ON |
261 | } |
262 | return kicked; | |
1da177e4 LT |
263 | } |
264 | ||
48b4554a JK |
265 | /* |
266 | * Input interrupt completion handler. | |
267 | */ | |
854561b0 | 268 | |
48b4554a | 269 | static void hid_irq_in(struct urb *urb) |
1da177e4 | 270 | { |
48b4554a JK |
271 | struct hid_device *hid = urb->context; |
272 | struct usbhid_device *usbhid = hid->driver_data; | |
273 | int status; | |
1da177e4 | 274 | |
48b4554a | 275 | switch (urb->status) { |
880d29f1 | 276 | case 0: /* success */ |
0361a28d | 277 | usbhid_mark_busy(usbhid); |
880d29f1 | 278 | usbhid->retry_delay = 0; |
0b750b3b JH |
279 | if ((hid->quirks & HID_QUIRK_ALWAYS_POLL) && !hid->open) |
280 | break; | |
880d29f1 JS |
281 | hid_input_report(urb->context, HID_INPUT_REPORT, |
282 | urb->transfer_buffer, | |
283 | urb->actual_length, 1); | |
0361a28d ON |
284 | /* |
285 | * autosuspend refused while keys are pressed | |
286 | * because most keyboards don't wake up when | |
287 | * a key is released | |
288 | */ | |
289 | if (hid_check_keys_pressed(hid)) | |
290 | set_bit(HID_KEYS_PRESSED, &usbhid->iofl); | |
291 | else | |
292 | clear_bit(HID_KEYS_PRESSED, &usbhid->iofl); | |
880d29f1 JS |
293 | break; |
294 | case -EPIPE: /* stall */ | |
0361a28d | 295 | usbhid_mark_busy(usbhid); |
880d29f1 JS |
296 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
297 | set_bit(HID_CLEAR_HALT, &usbhid->iofl); | |
298 | schedule_work(&usbhid->reset_work); | |
299 | return; | |
300 | case -ECONNRESET: /* unlink */ | |
301 | case -ENOENT: | |
302 | case -ESHUTDOWN: /* unplug */ | |
303 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); | |
304 | return; | |
305 | case -EILSEQ: /* protocol error or unplug */ | |
306 | case -EPROTO: /* protocol error or unplug */ | |
307 | case -ETIME: /* protocol error or unplug */ | |
308 | case -ETIMEDOUT: /* Should never happen, but... */ | |
0361a28d | 309 | usbhid_mark_busy(usbhid); |
880d29f1 JS |
310 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
311 | hid_io_error(hid); | |
312 | return; | |
313 | default: /* error */ | |
4291ee30 JP |
314 | hid_warn(urb->dev, "input irq status %d received\n", |
315 | urb->status); | |
48b4554a | 316 | } |
1da177e4 | 317 | |
48b4554a JK |
318 | status = usb_submit_urb(urb, GFP_ATOMIC); |
319 | if (status) { | |
320 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); | |
321 | if (status != -EPERM) { | |
4291ee30 JP |
322 | hid_err(hid, "can't resubmit intr, %s-%s/input%d, status %d\n", |
323 | hid_to_usb_dev(hid)->bus->bus_name, | |
324 | hid_to_usb_dev(hid)->devpath, | |
325 | usbhid->ifnum, status); | |
48b4554a JK |
326 | hid_io_error(hid); |
327 | } | |
328 | } | |
1da177e4 LT |
329 | } |
330 | ||
48b4554a | 331 | static int hid_submit_out(struct hid_device *hid) |
1da177e4 | 332 | { |
48b4554a | 333 | struct hid_report *report; |
f129ea6d | 334 | char *raw_report; |
4916b3a5 | 335 | struct usbhid_device *usbhid = hid->driver_data; |
68229689 | 336 | int r; |
4916b3a5 | 337 | |
f129ea6d AH |
338 | report = usbhid->out[usbhid->outtail].report; |
339 | raw_report = usbhid->out[usbhid->outtail].raw_report; | |
1da177e4 | 340 | |
f0befcd6 DK |
341 | usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + |
342 | 1 + (report->id > 0); | |
343 | usbhid->urbout->dev = hid_to_usb_dev(hid); | |
668160e5 AS |
344 | if (raw_report) { |
345 | memcpy(usbhid->outbuf, raw_report, | |
346 | usbhid->urbout->transfer_buffer_length); | |
347 | kfree(raw_report); | |
348 | usbhid->out[usbhid->outtail].raw_report = NULL; | |
349 | } | |
1d3e2023 | 350 | |
f0befcd6 | 351 | dbg_hid("submitting out urb\n"); |
d57cdcff | 352 | |
f0befcd6 DK |
353 | r = usb_submit_urb(usbhid->urbout, GFP_ATOMIC); |
354 | if (r < 0) { | |
355 | hid_err(hid, "usb_submit_urb(out) failed: %d\n", r); | |
356 | return r; | |
48b4554a | 357 | } |
f0befcd6 | 358 | usbhid->last_out = jiffies; |
48b4554a JK |
359 | return 0; |
360 | } | |
361 | ||
362 | static int hid_submit_ctrl(struct hid_device *hid) | |
1da177e4 LT |
363 | { |
364 | struct hid_report *report; | |
48b4554a | 365 | unsigned char dir; |
f129ea6d | 366 | char *raw_report; |
68229689 | 367 | int len, r; |
4916b3a5 | 368 | struct usbhid_device *usbhid = hid->driver_data; |
1da177e4 | 369 | |
48b4554a | 370 | report = usbhid->ctrl[usbhid->ctrltail].report; |
f129ea6d | 371 | raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report; |
48b4554a | 372 | dir = usbhid->ctrl[usbhid->ctrltail].dir; |
1da177e4 | 373 | |
f0befcd6 DK |
374 | len = ((report->size - 1) >> 3) + 1 + (report->id > 0); |
375 | if (dir == USB_DIR_OUT) { | |
376 | usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0); | |
377 | usbhid->urbctrl->transfer_buffer_length = len; | |
668160e5 AS |
378 | if (raw_report) { |
379 | memcpy(usbhid->ctrlbuf, raw_report, len); | |
380 | kfree(raw_report); | |
381 | usbhid->ctrl[usbhid->ctrltail].raw_report = NULL; | |
382 | } | |
f0befcd6 DK |
383 | } else { |
384 | int maxpacket, padlen; | |
385 | ||
386 | usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0); | |
387 | maxpacket = usb_maxpacket(hid_to_usb_dev(hid), | |
388 | usbhid->urbctrl->pipe, 0); | |
389 | if (maxpacket > 0) { | |
390 | padlen = DIV_ROUND_UP(len, maxpacket); | |
391 | padlen *= maxpacket; | |
392 | if (padlen > usbhid->bufsize) | |
393 | padlen = usbhid->bufsize; | |
394 | } else | |
395 | padlen = 0; | |
396 | usbhid->urbctrl->transfer_buffer_length = padlen; | |
48b4554a | 397 | } |
f0befcd6 DK |
398 | usbhid->urbctrl->dev = hid_to_usb_dev(hid); |
399 | ||
400 | usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir; | |
401 | usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : | |
402 | HID_REQ_GET_REPORT; | |
403 | usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | | |
404 | report->id); | |
405 | usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum); | |
406 | usbhid->cr->wLength = cpu_to_le16(len); | |
407 | ||
408 | dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n", | |
409 | usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : | |
410 | "Get_Report", | |
411 | usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength); | |
412 | ||
413 | r = usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC); | |
414 | if (r < 0) { | |
415 | hid_err(hid, "usb_submit_urb(ctrl) failed: %d\n", r); | |
416 | return r; | |
417 | } | |
418 | usbhid->last_ctrl = jiffies; | |
48b4554a JK |
419 | return 0; |
420 | } | |
1da177e4 | 421 | |
48b4554a JK |
422 | /* |
423 | * Output interrupt completion handler. | |
424 | */ | |
1da177e4 | 425 | |
48b4554a JK |
426 | static void hid_irq_out(struct urb *urb) |
427 | { | |
428 | struct hid_device *hid = urb->context; | |
429 | struct usbhid_device *usbhid = hid->driver_data; | |
430 | unsigned long flags; | |
431 | int unplug = 0; | |
1da177e4 | 432 | |
48b4554a | 433 | switch (urb->status) { |
880d29f1 JS |
434 | case 0: /* success */ |
435 | break; | |
436 | case -ESHUTDOWN: /* unplug */ | |
437 | unplug = 1; | |
438 | case -EILSEQ: /* protocol error or unplug */ | |
439 | case -EPROTO: /* protocol error or unplug */ | |
440 | case -ECONNRESET: /* unlink */ | |
441 | case -ENOENT: | |
442 | break; | |
443 | default: /* error */ | |
4291ee30 JP |
444 | hid_warn(urb->dev, "output irq status %d received\n", |
445 | urb->status); | |
48b4554a | 446 | } |
1da177e4 | 447 | |
0361a28d | 448 | spin_lock_irqsave(&usbhid->lock, flags); |
1da177e4 | 449 | |
93101af3 | 450 | if (unplug) { |
48b4554a | 451 | usbhid->outtail = usbhid->outhead; |
93101af3 | 452 | } else { |
48b4554a | 453 | usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1); |
1da177e4 | 454 | |
93101af3 AS |
455 | if (usbhid->outhead != usbhid->outtail && |
456 | hid_submit_out(hid) == 0) { | |
457 | /* Successfully submitted next urb in queue */ | |
458 | spin_unlock_irqrestore(&usbhid->lock, flags); | |
459 | return; | |
460 | } | |
48b4554a | 461 | } |
1da177e4 | 462 | |
48b4554a | 463 | clear_bit(HID_OUT_RUNNING, &usbhid->iofl); |
0361a28d | 464 | spin_unlock_irqrestore(&usbhid->lock, flags); |
68229689 | 465 | usb_autopm_put_interface_async(usbhid->intf); |
1d1bdd20 | 466 | wake_up(&usbhid->wait); |
48b4554a | 467 | } |
6345fdfd | 468 | |
48b4554a JK |
469 | /* |
470 | * Control pipe completion handler. | |
471 | */ | |
1da177e4 | 472 | |
48b4554a JK |
473 | static void hid_ctrl(struct urb *urb) |
474 | { | |
475 | struct hid_device *hid = urb->context; | |
476 | struct usbhid_device *usbhid = hid->driver_data; | |
0361a28d | 477 | int unplug = 0, status = urb->status; |
1da177e4 | 478 | |
0361a28d | 479 | spin_lock(&usbhid->lock); |
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 | |
93101af3 | 500 | if (unplug) { |
48b4554a | 501 | usbhid->ctrltail = usbhid->ctrlhead; |
93101af3 | 502 | } else { |
48b4554a | 503 | usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1); |
1da177e4 | 504 | |
93101af3 AS |
505 | if (usbhid->ctrlhead != usbhid->ctrltail && |
506 | hid_submit_ctrl(hid) == 0) { | |
507 | /* Successfully submitted next urb in queue */ | |
508 | spin_unlock(&usbhid->lock); | |
509 | return; | |
510 | } | |
48b4554a | 511 | } |
1da177e4 | 512 | |
48b4554a | 513 | clear_bit(HID_CTRL_RUNNING, &usbhid->iofl); |
0361a28d | 514 | spin_unlock(&usbhid->lock); |
68229689 | 515 | usb_autopm_put_interface_async(usbhid->intf); |
1d1bdd20 | 516 | wake_up(&usbhid->wait); |
48b4554a | 517 | } |
1da177e4 | 518 | |
52cfc61b HS |
519 | static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report, |
520 | unsigned char dir) | |
48b4554a JK |
521 | { |
522 | int head; | |
48b4554a | 523 | struct usbhid_device *usbhid = hid->driver_data; |
1da177e4 | 524 | |
46df9ded RA |
525 | if (((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN) || |
526 | test_bit(HID_DISCONNECTED, &usbhid->iofl)) | |
48b4554a | 527 | return; |
b857c651 | 528 | |
48b4554a | 529 | if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) { |
48b4554a | 530 | if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) { |
4291ee30 | 531 | hid_warn(hid, "output queue full\n"); |
48b4554a JK |
532 | return; |
533 | } | |
1da177e4 | 534 | |
27ce4050 | 535 | usbhid->out[usbhid->outhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC); |
f129ea6d | 536 | if (!usbhid->out[usbhid->outhead].raw_report) { |
4291ee30 | 537 | hid_warn(hid, "output queueing failed\n"); |
f129ea6d AH |
538 | return; |
539 | } | |
540 | hid_output_report(report, usbhid->out[usbhid->outhead].raw_report); | |
541 | usbhid->out[usbhid->outhead].report = report; | |
48b4554a | 542 | usbhid->outhead = head; |
4871d3be | 543 | |
01a7c984 AS |
544 | /* If the queue isn't running, restart it */ |
545 | if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl)) { | |
546 | usbhid_restart_out_queue(usbhid); | |
f0befcd6 | 547 | |
01a7c984 AS |
548 | /* Otherwise see if an earlier request has timed out */ |
549 | } else if (time_after(jiffies, usbhid->last_out + HZ * 5)) { | |
550 | ||
551 | /* Prevent autosuspend following the unlink */ | |
552 | usb_autopm_get_interface_no_resume(usbhid->intf); | |
f0befcd6 | 553 | |
858155fb | 554 | /* |
01a7c984 AS |
555 | * Prevent resubmission in case the URB completes |
556 | * before we can unlink it. We don't want to cancel | |
557 | * the wrong transfer! | |
858155fb | 558 | */ |
01a7c984 AS |
559 | usb_block_urb(usbhid->urbout); |
560 | ||
561 | /* Drop lock to avoid deadlock if the callback runs */ | |
562 | spin_unlock(&usbhid->lock); | |
563 | ||
564 | usb_unlink_urb(usbhid->urbout); | |
565 | spin_lock(&usbhid->lock); | |
566 | usb_unblock_urb(usbhid->urbout); | |
567 | ||
568 | /* Unlink might have stopped the queue */ | |
569 | if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl)) | |
570 | usbhid_restart_out_queue(usbhid); | |
571 | ||
572 | /* Now we can allow autosuspend again */ | |
573 | usb_autopm_put_interface_async(usbhid->intf); | |
858155fb | 574 | } |
48b4554a JK |
575 | return; |
576 | } | |
1da177e4 | 577 | |
48b4554a | 578 | if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) { |
4291ee30 | 579 | hid_warn(hid, "control queue full\n"); |
48b4554a JK |
580 | return; |
581 | } | |
8fd80133 | 582 | |
f129ea6d | 583 | if (dir == USB_DIR_OUT) { |
27ce4050 | 584 | usbhid->ctrl[usbhid->ctrlhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC); |
f129ea6d | 585 | if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) { |
4291ee30 | 586 | hid_warn(hid, "control queueing failed\n"); |
f129ea6d AH |
587 | return; |
588 | } | |
589 | hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report); | |
590 | } | |
48b4554a JK |
591 | usbhid->ctrl[usbhid->ctrlhead].report = report; |
592 | usbhid->ctrl[usbhid->ctrlhead].dir = dir; | |
593 | usbhid->ctrlhead = head; | |
8fd80133 | 594 | |
01a7c984 AS |
595 | /* If the queue isn't running, restart it */ |
596 | if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) { | |
597 | usbhid_restart_ctrl_queue(usbhid); | |
f0befcd6 | 598 | |
01a7c984 AS |
599 | /* Otherwise see if an earlier request has timed out */ |
600 | } else if (time_after(jiffies, usbhid->last_ctrl + HZ * 5)) { | |
601 | ||
602 | /* Prevent autosuspend following the unlink */ | |
603 | usb_autopm_get_interface_no_resume(usbhid->intf); | |
f0befcd6 | 604 | |
858155fb | 605 | /* |
01a7c984 AS |
606 | * Prevent resubmission in case the URB completes |
607 | * before we can unlink it. We don't want to cancel | |
608 | * the wrong transfer! | |
858155fb | 609 | */ |
01a7c984 AS |
610 | usb_block_urb(usbhid->urbctrl); |
611 | ||
612 | /* Drop lock to avoid deadlock if the callback runs */ | |
613 | spin_unlock(&usbhid->lock); | |
614 | ||
615 | usb_unlink_urb(usbhid->urbctrl); | |
616 | spin_lock(&usbhid->lock); | |
617 | usb_unblock_urb(usbhid->urbctrl); | |
618 | ||
619 | /* Unlink might have stopped the queue */ | |
620 | if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) | |
621 | usbhid_restart_ctrl_queue(usbhid); | |
622 | ||
623 | /* Now we can allow autosuspend again */ | |
624 | usb_autopm_put_interface_async(usbhid->intf); | |
858155fb | 625 | } |
0361a28d | 626 | } |
931e24b9 | 627 | |
d8814272 | 628 | static void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir) |
0361a28d ON |
629 | { |
630 | struct usbhid_device *usbhid = hid->driver_data; | |
631 | unsigned long flags; | |
931e24b9 | 632 | |
0361a28d ON |
633 | spin_lock_irqsave(&usbhid->lock, flags); |
634 | __usbhid_submit_report(hid, report, dir); | |
635 | spin_unlock_irqrestore(&usbhid->lock, flags); | |
48b4554a | 636 | } |
23b0d968 | 637 | |
b7966a4d | 638 | static int usbhid_wait_io(struct hid_device *hid) |
48b4554a JK |
639 | { |
640 | struct usbhid_device *usbhid = hid->driver_data; | |
25914662 | 641 | |
1d1bdd20 JS |
642 | if (!wait_event_timeout(usbhid->wait, |
643 | (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) && | |
644 | !test_bit(HID_OUT_RUNNING, &usbhid->iofl)), | |
48b4554a | 645 | 10*HZ)) { |
58037eb9 | 646 | dbg_hid("timeout waiting for ctrl or out queue to clear\n"); |
48b4554a JK |
647 | return -1; |
648 | } | |
1da177e4 | 649 | |
48b4554a JK |
650 | return 0; |
651 | } | |
53880546 | 652 | |
48b4554a JK |
653 | static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle) |
654 | { | |
655 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
656 | HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report, | |
657 | ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT); | |
658 | } | |
1da177e4 | 659 | |
48b4554a JK |
660 | static int hid_get_class_descriptor(struct usb_device *dev, int ifnum, |
661 | unsigned char type, void *buf, int size) | |
662 | { | |
663 | int result, retries = 4; | |
1da177e4 | 664 | |
48b4554a | 665 | memset(buf, 0, size); |
1da177e4 | 666 | |
48b4554a JK |
667 | do { |
668 | result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
669 | USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN, | |
670 | (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT); | |
671 | retries--; | |
672 | } while (result < size && retries); | |
673 | return result; | |
674 | } | |
940824b0 | 675 | |
48b4554a JK |
676 | int usbhid_open(struct hid_device *hid) |
677 | { | |
933e3187 | 678 | struct usbhid_device *usbhid = hid->driver_data; |
a8c52b66 | 679 | int res = 0; |
933e3187 | 680 | |
0361a28d | 681 | mutex_lock(&hid_open_mut); |
933e3187 ON |
682 | if (!hid->open++) { |
683 | res = usb_autopm_get_interface(usbhid->intf); | |
68229689 | 684 | /* the device must be awake to reliably request remote wakeup */ |
933e3187 ON |
685 | if (res < 0) { |
686 | hid->open--; | |
a8c52b66 ON |
687 | res = -EIO; |
688 | goto done; | |
933e3187 | 689 | } |
0361a28d | 690 | usbhid->intf->needs_remote_wakeup = 1; |
a8c52b66 ON |
691 | res = hid_start_in(hid); |
692 | if (res) { | |
693 | if (res != -ENOSPC) { | |
694 | hid_io_error(hid); | |
695 | res = 0; | |
696 | } else { | |
697 | /* no use opening if resources are insufficient */ | |
698 | hid->open--; | |
699 | res = -EBUSY; | |
700 | usbhid->intf->needs_remote_wakeup = 0; | |
701 | } | |
702 | } | |
0361a28d | 703 | usb_autopm_put_interface(usbhid->intf); |
933e3187 | 704 | } |
a8c52b66 | 705 | done: |
0361a28d | 706 | mutex_unlock(&hid_open_mut); |
a8c52b66 | 707 | return res; |
48b4554a | 708 | } |
a417a21e | 709 | |
48b4554a JK |
710 | void usbhid_close(struct hid_device *hid) |
711 | { | |
712 | struct usbhid_device *usbhid = hid->driver_data; | |
eab9edd2 | 713 | |
0361a28d ON |
714 | mutex_lock(&hid_open_mut); |
715 | ||
716 | /* protecting hid->open to make sure we don't restart | |
717 | * data acquistion due to a resumption we no longer | |
718 | * care about | |
719 | */ | |
720 | spin_lock_irq(&usbhid->lock); | |
933e3187 | 721 | if (!--hid->open) { |
0361a28d | 722 | spin_unlock_irq(&usbhid->lock); |
89092ddd | 723 | hid_cancel_delayed_stuff(usbhid); |
0b750b3b JH |
724 | if (!(hid->quirks & HID_QUIRK_ALWAYS_POLL)) { |
725 | usb_kill_urb(usbhid->urbin); | |
726 | usbhid->intf->needs_remote_wakeup = 0; | |
727 | } | |
0361a28d ON |
728 | } else { |
729 | spin_unlock_irq(&usbhid->lock); | |
933e3187 | 730 | } |
0361a28d | 731 | mutex_unlock(&hid_open_mut); |
48b4554a | 732 | } |
1d3e2023 | 733 | |
48b4554a JK |
734 | /* |
735 | * Initialize all reports | |
736 | */ | |
41ad5fba | 737 | |
48b4554a JK |
738 | void usbhid_init_reports(struct hid_device *hid) |
739 | { | |
740 | struct hid_report *report; | |
741 | struct usbhid_device *usbhid = hid->driver_data; | |
595e9276 | 742 | struct hid_report_enum *report_enum; |
48b4554a | 743 | int err, ret; |
41ad5fba | 744 | |
595e9276 BT |
745 | if (!(hid->quirks & HID_QUIRK_NO_INIT_INPUT_REPORTS)) { |
746 | report_enum = &hid->report_enum[HID_INPUT_REPORT]; | |
747 | list_for_each_entry(report, &report_enum->report_list, list) | |
748 | usbhid_submit_report(hid, report, USB_DIR_IN); | |
749 | } | |
5556feae | 750 | |
595e9276 BT |
751 | report_enum = &hid->report_enum[HID_FEATURE_REPORT]; |
752 | list_for_each_entry(report, &report_enum->report_list, list) | |
48b4554a | 753 | usbhid_submit_report(hid, report, USB_DIR_IN); |
4a1a4d8b | 754 | |
48b4554a JK |
755 | err = 0; |
756 | ret = usbhid_wait_io(hid); | |
757 | while (ret) { | |
758 | err |= ret; | |
759 | if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) | |
760 | usb_kill_urb(usbhid->urbctrl); | |
761 | if (test_bit(HID_OUT_RUNNING, &usbhid->iofl)) | |
762 | usb_kill_urb(usbhid->urbout); | |
763 | ret = usbhid_wait_io(hid); | |
764 | } | |
3f9b4076 | 765 | |
48b4554a | 766 | if (err) |
4291ee30 | 767 | hid_warn(hid, "timeout initializing reports\n"); |
48b4554a | 768 | } |
1da177e4 | 769 | |
713c8aad PZ |
770 | /* |
771 | * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01). | |
772 | */ | |
773 | static int hid_find_field_early(struct hid_device *hid, unsigned int page, | |
774 | unsigned int hid_code, struct hid_field **pfield) | |
775 | { | |
776 | struct hid_report *report; | |
777 | struct hid_field *field; | |
778 | struct hid_usage *usage; | |
779 | int i, j; | |
780 | ||
781 | list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { | |
782 | for (i = 0; i < report->maxfield; i++) { | |
783 | field = report->field[i]; | |
784 | for (j = 0; j < field->maxusage; j++) { | |
785 | usage = &field->usage[j]; | |
786 | if ((usage->hid & HID_USAGE_PAGE) == page && | |
787 | (usage->hid & 0xFFFF) == hid_code) { | |
788 | *pfield = field; | |
789 | return j; | |
790 | } | |
791 | } | |
792 | } | |
793 | } | |
794 | return -1; | |
795 | } | |
796 | ||
ddf64a3c | 797 | static void usbhid_set_leds(struct hid_device *hid) |
713c8aad PZ |
798 | { |
799 | struct hid_field *field; | |
800 | int offset; | |
801 | ||
802 | if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) { | |
803 | hid_set_field(field, offset, 0); | |
804 | usbhid_submit_report(hid, field->report, USB_DIR_OUT); | |
805 | } | |
806 | } | |
807 | ||
bf0964dc MH |
808 | /* |
809 | * Traverse the supplied list of reports and find the longest | |
810 | */ | |
282bfd4c JS |
811 | static void hid_find_max_report(struct hid_device *hid, unsigned int type, |
812 | unsigned int *max) | |
bf0964dc MH |
813 | { |
814 | struct hid_report *report; | |
282bfd4c | 815 | unsigned int size; |
bf0964dc MH |
816 | |
817 | list_for_each_entry(report, &hid->report_enum[type].report_list, list) { | |
efc7ce18 | 818 | size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered; |
bf0964dc MH |
819 | if (*max < size) |
820 | *max = size; | |
821 | } | |
822 | } | |
823 | ||
1da177e4 LT |
824 | static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid) |
825 | { | |
4916b3a5 JK |
826 | struct usbhid_device *usbhid = hid->driver_data; |
827 | ||
997ea58e | 828 | usbhid->inbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL, |
898089d0 | 829 | &usbhid->inbuf_dma); |
997ea58e | 830 | usbhid->outbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL, |
898089d0 | 831 | &usbhid->outbuf_dma); |
0ede76fc | 832 | usbhid->cr = kmalloc(sizeof(*usbhid->cr), GFP_KERNEL); |
997ea58e | 833 | usbhid->ctrlbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL, |
898089d0 JS |
834 | &usbhid->ctrlbuf_dma); |
835 | if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr || | |
836 | !usbhid->ctrlbuf) | |
1da177e4 LT |
837 | return -1; |
838 | ||
839 | return 0; | |
840 | } | |
841 | ||
b4dbde9d AO |
842 | static int usbhid_get_raw_report(struct hid_device *hid, |
843 | unsigned char report_number, __u8 *buf, size_t count, | |
844 | unsigned char report_type) | |
845 | { | |
846 | struct usbhid_device *usbhid = hid->driver_data; | |
847 | struct usb_device *dev = hid_to_usb_dev(hid); | |
848 | struct usb_interface *intf = usbhid->intf; | |
849 | struct usb_host_interface *interface = intf->cur_altsetting; | |
850 | int skipped_report_id = 0; | |
851 | int ret; | |
852 | ||
853 | /* Byte 0 is the report number. Report data starts at byte 1.*/ | |
854 | buf[0] = report_number; | |
855 | if (report_number == 0x0) { | |
856 | /* Offset the return buffer by 1, so that the report ID | |
857 | will remain in byte 0. */ | |
858 | buf++; | |
859 | count--; | |
860 | skipped_report_id = 1; | |
861 | } | |
862 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
863 | HID_REQ_GET_REPORT, | |
864 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
865 | ((report_type + 1) << 8) | report_number, | |
866 | interface->desc.bInterfaceNumber, buf, count, | |
867 | USB_CTRL_SET_TIMEOUT); | |
868 | ||
869 | /* count also the report id */ | |
870 | if (ret > 0 && skipped_report_id) | |
871 | ret++; | |
872 | ||
873 | return ret; | |
874 | } | |
875 | ||
975a6832 FP |
876 | static int usbhid_set_raw_report(struct hid_device *hid, unsigned int reportnum, |
877 | __u8 *buf, size_t count, unsigned char rtype) | |
878 | { | |
879 | struct usbhid_device *usbhid = hid->driver_data; | |
880 | struct usb_device *dev = hid_to_usb_dev(hid); | |
881 | struct usb_interface *intf = usbhid->intf; | |
882 | struct usb_host_interface *interface = intf->cur_altsetting; | |
883 | int ret, skipped_report_id = 0; | |
884 | ||
885 | /* Byte 0 is the report number. Report data starts at byte 1.*/ | |
e534a935 BT |
886 | if ((rtype == HID_OUTPUT_REPORT) && |
887 | (hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORT_ID)) | |
888 | buf[0] = 0; | |
889 | else | |
890 | buf[0] = reportnum; | |
891 | ||
975a6832 FP |
892 | if (buf[0] == 0x0) { |
893 | /* Don't send the Report ID */ | |
894 | buf++; | |
895 | count--; | |
896 | skipped_report_id = 1; | |
897 | } | |
898 | ||
899 | ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
900 | HID_REQ_SET_REPORT, | |
901 | USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
902 | ((rtype + 1) << 8) | reportnum, | |
903 | interface->desc.bInterfaceNumber, buf, count, | |
904 | USB_CTRL_SET_TIMEOUT); | |
905 | /* count also the report id, if this was a numbered report. */ | |
906 | if (ret > 0 && skipped_report_id) | |
907 | ret++; | |
908 | ||
909 | return ret; | |
910 | } | |
911 | ||
975a6832 FP |
912 | static int usbhid_output_report(struct hid_device *hid, __u8 *buf, size_t count) |
913 | { | |
914 | struct usbhid_device *usbhid = hid->driver_data; | |
915 | struct usb_device *dev = hid_to_usb_dev(hid); | |
916 | int actual_length, skipped_report_id = 0, ret; | |
917 | ||
918 | if (!usbhid->urbout) | |
ddea1af9 | 919 | return -ENOSYS; |
975a6832 FP |
920 | |
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_interrupt_msg(dev, usbhid->urbout->pipe, | |
929 | buf, count, &actual_length, | |
930 | USB_CTRL_SET_TIMEOUT); | |
931 | /* return the number of bytes transferred */ | |
932 | if (ret == 0) { | |
933 | ret = actual_length; | |
934 | /* count also the report id */ | |
935 | if (skipped_report_id) | |
936 | ret++; | |
937 | } | |
938 | ||
939 | return ret; | |
940 | } | |
941 | ||
0361a28d ON |
942 | static void usbhid_restart_queues(struct usbhid_device *usbhid) |
943 | { | |
eb055fd0 | 944 | if (usbhid->urbout && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)) |
0361a28d | 945 | usbhid_restart_out_queue(usbhid); |
eb055fd0 AS |
946 | if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) |
947 | usbhid_restart_ctrl_queue(usbhid); | |
0361a28d ON |
948 | } |
949 | ||
1da177e4 LT |
950 | static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid) |
951 | { | |
4916b3a5 JK |
952 | struct usbhid_device *usbhid = hid->driver_data; |
953 | ||
997ea58e DM |
954 | usb_free_coherent(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma); |
955 | usb_free_coherent(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma); | |
0ede76fc | 956 | kfree(usbhid->cr); |
997ea58e | 957 | usb_free_coherent(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma); |
1da177e4 LT |
958 | } |
959 | ||
c500c971 JS |
960 | static int usbhid_parse(struct hid_device *hid) |
961 | { | |
962 | struct usb_interface *intf = to_usb_interface(hid->dev.parent); | |
1da177e4 LT |
963 | struct usb_host_interface *interface = intf->cur_altsetting; |
964 | struct usb_device *dev = interface_to_usbdev (intf); | |
965 | struct hid_descriptor *hdesc; | |
2eb5dc30 | 966 | u32 quirks = 0; |
c500c971 | 967 | unsigned int rsize = 0; |
c5b7c7c3 | 968 | char *rdesc; |
c500c971 | 969 | int ret, n; |
1da177e4 | 970 | |
2eb5dc30 PW |
971 | quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor), |
972 | le16_to_cpu(dev->descriptor.idProduct)); | |
1da177e4 | 973 | |
6f4303fb JK |
974 | if (quirks & HID_QUIRK_IGNORE) |
975 | return -ENODEV; | |
976 | ||
0f28b55d AS |
977 | /* Many keyboards and mice don't like to be polled for reports, |
978 | * so we will always set the HID_QUIRK_NOGET flag for them. */ | |
979 | if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) { | |
980 | if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD || | |
981 | interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE) | |
982 | quirks |= HID_QUIRK_NOGET; | |
983 | } | |
984 | ||
c5b7c7c3 DT |
985 | if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) && |
986 | (!interface->desc.bNumEndpoints || | |
987 | usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) { | |
58037eb9 | 988 | dbg_hid("class descriptor not present\n"); |
c500c971 | 989 | return -ENODEV; |
1da177e4 LT |
990 | } |
991 | ||
c500c971 JS |
992 | hid->version = le16_to_cpu(hdesc->bcdHID); |
993 | hid->country = hdesc->bCountryCode; | |
994 | ||
1da177e4 LT |
995 | for (n = 0; n < hdesc->bNumDescriptors; n++) |
996 | if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT) | |
997 | rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength); | |
998 | ||
999 | if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) { | |
58037eb9 | 1000 | dbg_hid("weird size of report descriptor (%u)\n", rsize); |
c500c971 | 1001 | return -EINVAL; |
1da177e4 LT |
1002 | } |
1003 | ||
1004 | if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) { | |
58037eb9 | 1005 | dbg_hid("couldn't allocate rdesc memory\n"); |
c500c971 | 1006 | return -ENOMEM; |
1da177e4 LT |
1007 | } |
1008 | ||
854561b0 VP |
1009 | hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0); |
1010 | ||
c500c971 JS |
1011 | ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber, |
1012 | HID_DT_REPORT, rdesc, rsize); | |
1013 | if (ret < 0) { | |
58037eb9 | 1014 | dbg_hid("reading report descriptor failed\n"); |
1da177e4 | 1015 | kfree(rdesc); |
c500c971 | 1016 | goto err; |
1da177e4 LT |
1017 | } |
1018 | ||
c500c971 JS |
1019 | ret = hid_parse_report(hid, rdesc, rsize); |
1020 | kfree(rdesc); | |
1021 | if (ret) { | |
58037eb9 | 1022 | dbg_hid("parsing report descriptor failed\n"); |
c500c971 | 1023 | goto err; |
1da177e4 LT |
1024 | } |
1025 | ||
f5208997 | 1026 | hid->quirks |= quirks; |
1da177e4 | 1027 | |
c500c971 JS |
1028 | return 0; |
1029 | err: | |
1030 | return ret; | |
1031 | } | |
1032 | ||
1033 | static int usbhid_start(struct hid_device *hid) | |
1034 | { | |
1035 | struct usb_interface *intf = to_usb_interface(hid->dev.parent); | |
1036 | struct usb_host_interface *interface = intf->cur_altsetting; | |
1037 | struct usb_device *dev = interface_to_usbdev(intf); | |
3d5afd32 | 1038 | struct usbhid_device *usbhid = hid->driver_data; |
c500c971 JS |
1039 | unsigned int n, insize = 0; |
1040 | int ret; | |
1041 | ||
e3e14de5 JS |
1042 | clear_bit(HID_DISCONNECTED, &usbhid->iofl); |
1043 | ||
4916b3a5 JK |
1044 | usbhid->bufsize = HID_MIN_BUFFER_SIZE; |
1045 | hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize); | |
1046 | hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize); | |
1047 | hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize); | |
bf0964dc | 1048 | |
4916b3a5 JK |
1049 | if (usbhid->bufsize > HID_MAX_BUFFER_SIZE) |
1050 | usbhid->bufsize = HID_MAX_BUFFER_SIZE; | |
bf0964dc MH |
1051 | |
1052 | hid_find_max_report(hid, HID_INPUT_REPORT, &insize); | |
1053 | ||
1054 | if (insize > HID_MAX_BUFFER_SIZE) | |
1055 | insize = HID_MAX_BUFFER_SIZE; | |
1056 | ||
c500c971 JS |
1057 | if (hid_alloc_buffers(dev, hid)) { |
1058 | ret = -ENOMEM; | |
1da177e4 | 1059 | goto fail; |
f345c37c PS |
1060 | } |
1061 | ||
1da177e4 | 1062 | for (n = 0; n < interface->desc.bNumEndpoints; n++) { |
1da177e4 LT |
1063 | struct usb_endpoint_descriptor *endpoint; |
1064 | int pipe; | |
1065 | int interval; | |
1066 | ||
1067 | endpoint = &interface->endpoint[n].desc; | |
581a2739 | 1068 | if (!usb_endpoint_xfer_int(endpoint)) |
1da177e4 LT |
1069 | continue; |
1070 | ||
1da177e4 | 1071 | interval = endpoint->bInterval; |
1da177e4 | 1072 | |
f345c37c | 1073 | /* Some vendors give fullspeed interval on highspeed devides */ |
c500c971 | 1074 | if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL && |
f345c37c PS |
1075 | dev->speed == USB_SPEED_HIGH) { |
1076 | interval = fls(endpoint->bInterval*8); | |
1077 | printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n", | |
1078 | hid->name, endpoint->bInterval, interval); | |
1079 | } | |
1080 | ||
1da177e4 LT |
1081 | /* Change the polling interval of mice. */ |
1082 | if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0) | |
1083 | interval = hid_mousepoll_interval; | |
05f091ab | 1084 | |
c500c971 | 1085 | ret = -ENOMEM; |
0f12aa03 | 1086 | if (usb_endpoint_dir_in(endpoint)) { |
4916b3a5 | 1087 | if (usbhid->urbin) |
1da177e4 | 1088 | continue; |
4916b3a5 | 1089 | if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL))) |
1da177e4 LT |
1090 | goto fail; |
1091 | pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress); | |
4916b3a5 | 1092 | usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize, |
1da177e4 | 1093 | hid_irq_in, hid, interval); |
4916b3a5 JK |
1094 | usbhid->urbin->transfer_dma = usbhid->inbuf_dma; |
1095 | usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1da177e4 | 1096 | } else { |
4916b3a5 | 1097 | if (usbhid->urbout) |
1da177e4 | 1098 | continue; |
4916b3a5 | 1099 | if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL))) |
1da177e4 LT |
1100 | goto fail; |
1101 | pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress); | |
4916b3a5 | 1102 | usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0, |
1da177e4 | 1103 | hid_irq_out, hid, interval); |
4916b3a5 JK |
1104 | usbhid->urbout->transfer_dma = usbhid->outbuf_dma; |
1105 | usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1da177e4 LT |
1106 | } |
1107 | } | |
1108 | ||
4916b3a5 | 1109 | usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL); |
c500c971 JS |
1110 | if (!usbhid->urbctrl) { |
1111 | ret = -ENOMEM; | |
1da177e4 | 1112 | goto fail; |
c500c971 | 1113 | } |
c5b7c7c3 | 1114 | |
4916b3a5 JK |
1115 | usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr, |
1116 | usbhid->ctrlbuf, 1, hid_ctrl, hid); | |
4916b3a5 | 1117 | usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma; |
0ede76fc | 1118 | usbhid->urbctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
c500c971 | 1119 | |
5b915d9e JK |
1120 | if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS)) |
1121 | usbhid_init_reports(hid); | |
93c10132 | 1122 | |
3d5afd32 | 1123 | set_bit(HID_STARTED, &usbhid->iofl); |
3d5afd32 | 1124 | |
0b750b3b JH |
1125 | if (hid->quirks & HID_QUIRK_ALWAYS_POLL) { |
1126 | ret = usb_autopm_get_interface(usbhid->intf); | |
1127 | if (ret) | |
1128 | goto fail; | |
1129 | usbhid->intf->needs_remote_wakeup = 1; | |
1130 | ret = hid_start_in(hid); | |
1131 | if (ret) { | |
1132 | dev_err(&hid->dev, | |
1133 | "failed to start in urb: %d\n", ret); | |
1134 | } | |
1135 | usb_autopm_put_interface(usbhid->intf); | |
1136 | } | |
1137 | ||
08ef08ee AS |
1138 | /* Some keyboards don't work until their LEDs have been set. |
1139 | * Since BIOSes do set the LEDs, it must be safe for any device | |
1140 | * that supports the keyboard boot protocol. | |
3d61510f AS |
1141 | * In addition, enable remote wakeup by default for all keyboard |
1142 | * devices supporting the boot protocol. | |
08ef08ee AS |
1143 | */ |
1144 | if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT && | |
1145 | interface->desc.bInterfaceProtocol == | |
3d61510f | 1146 | USB_INTERFACE_PROTOCOL_KEYBOARD) { |
08ef08ee | 1147 | usbhid_set_leds(hid); |
3d61510f AS |
1148 | device_set_wakeup_enable(&dev->dev, 1); |
1149 | } | |
c500c971 | 1150 | return 0; |
1da177e4 LT |
1151 | |
1152 | fail: | |
4916b3a5 JK |
1153 | usb_free_urb(usbhid->urbin); |
1154 | usb_free_urb(usbhid->urbout); | |
1155 | usb_free_urb(usbhid->urbctrl); | |
e3e14de5 JS |
1156 | usbhid->urbin = NULL; |
1157 | usbhid->urbout = NULL; | |
1158 | usbhid->urbctrl = NULL; | |
22f675f3 | 1159 | hid_free_buffers(dev, hid); |
c500c971 | 1160 | return ret; |
1da177e4 LT |
1161 | } |
1162 | ||
c500c971 | 1163 | static void usbhid_stop(struct hid_device *hid) |
1da177e4 | 1164 | { |
c500c971 | 1165 | struct usbhid_device *usbhid = hid->driver_data; |
1da177e4 | 1166 | |
c500c971 | 1167 | if (WARN_ON(!usbhid)) |
1da177e4 LT |
1168 | return; |
1169 | ||
0b750b3b JH |
1170 | if (hid->quirks & HID_QUIRK_ALWAYS_POLL) |
1171 | usbhid->intf->needs_remote_wakeup = 0; | |
1172 | ||
3d5afd32 | 1173 | clear_bit(HID_STARTED, &usbhid->iofl); |
4371ea82 | 1174 | spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */ |
69626f23 | 1175 | set_bit(HID_DISCONNECTED, &usbhid->iofl); |
0361a28d | 1176 | spin_unlock_irq(&usbhid->lock); |
4916b3a5 JK |
1177 | usb_kill_urb(usbhid->urbin); |
1178 | usb_kill_urb(usbhid->urbout); | |
1179 | usb_kill_urb(usbhid->urbctrl); | |
1da177e4 | 1180 | |
0361a28d | 1181 | hid_cancel_delayed_stuff(usbhid); |
aef4e266 | 1182 | |
c500c971 JS |
1183 | hid->claimed = 0; |
1184 | ||
4916b3a5 JK |
1185 | usb_free_urb(usbhid->urbin); |
1186 | usb_free_urb(usbhid->urbctrl); | |
1187 | usb_free_urb(usbhid->urbout); | |
e3e14de5 JS |
1188 | usbhid->urbin = NULL; /* don't mess up next start */ |
1189 | usbhid->urbctrl = NULL; | |
1190 | usbhid->urbout = NULL; | |
1da177e4 | 1191 | |
be820975 | 1192 | hid_free_buffers(hid_to_usb_dev(hid), hid); |
1da177e4 LT |
1193 | } |
1194 | ||
0361a28d ON |
1195 | static int usbhid_power(struct hid_device *hid, int lvl) |
1196 | { | |
1197 | int r = 0; | |
1198 | ||
1199 | switch (lvl) { | |
1200 | case PM_HINT_FULLON: | |
1201 | r = usbhid_get_power(hid); | |
1202 | break; | |
1203 | case PM_HINT_NORMAL: | |
1204 | usbhid_put_power(hid); | |
1205 | break; | |
1206 | } | |
1207 | return r; | |
1208 | } | |
1209 | ||
e90a6df8 HR |
1210 | static void usbhid_request(struct hid_device *hid, struct hid_report *rep, int reqtype) |
1211 | { | |
1212 | switch (reqtype) { | |
1213 | case HID_REQ_GET_REPORT: | |
1214 | usbhid_submit_report(hid, rep, USB_DIR_IN); | |
1215 | break; | |
1216 | case HID_REQ_SET_REPORT: | |
1217 | usbhid_submit_report(hid, rep, USB_DIR_OUT); | |
1218 | break; | |
1219 | } | |
1220 | } | |
1221 | ||
975a6832 FP |
1222 | static int usbhid_raw_request(struct hid_device *hid, unsigned char reportnum, |
1223 | __u8 *buf, size_t len, unsigned char rtype, | |
1224 | int reqtype) | |
1225 | { | |
1226 | switch (reqtype) { | |
1227 | case HID_REQ_GET_REPORT: | |
1228 | return usbhid_get_raw_report(hid, reportnum, buf, len, rtype); | |
1229 | case HID_REQ_SET_REPORT: | |
1230 | return usbhid_set_raw_report(hid, reportnum, buf, len, rtype); | |
1231 | default: | |
1232 | return -EIO; | |
1233 | } | |
1234 | } | |
1235 | ||
9684819b BT |
1236 | static int usbhid_idle(struct hid_device *hid, int report, int idle, |
1237 | int reqtype) | |
1238 | { | |
1239 | struct usb_device *dev = hid_to_usb_dev(hid); | |
1240 | struct usb_interface *intf = to_usb_interface(hid->dev.parent); | |
1241 | struct usb_host_interface *interface = intf->cur_altsetting; | |
1242 | int ifnum = interface->desc.bInterfaceNumber; | |
1243 | ||
1244 | if (reqtype != HID_REQ_SET_IDLE) | |
1245 | return -EINVAL; | |
1246 | ||
1247 | return hid_set_idle(dev, ifnum, report, idle); | |
1248 | } | |
1249 | ||
c500c971 JS |
1250 | static struct hid_ll_driver usb_hid_driver = { |
1251 | .parse = usbhid_parse, | |
1252 | .start = usbhid_start, | |
1253 | .stop = usbhid_stop, | |
1254 | .open = usbhid_open, | |
1255 | .close = usbhid_close, | |
0361a28d | 1256 | .power = usbhid_power, |
e90a6df8 | 1257 | .request = usbhid_request, |
3373443b | 1258 | .wait = usbhid_wait_io, |
975a6832 FP |
1259 | .raw_request = usbhid_raw_request, |
1260 | .output_report = usbhid_output_report, | |
9684819b | 1261 | .idle = usbhid_idle, |
c500c971 JS |
1262 | }; |
1263 | ||
c4c259bc | 1264 | static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id) |
1da177e4 | 1265 | { |
131d3a7a | 1266 | struct usb_host_interface *interface = intf->cur_altsetting; |
c500c971 | 1267 | struct usb_device *dev = interface_to_usbdev(intf); |
3d5afd32 | 1268 | struct usbhid_device *usbhid; |
1da177e4 | 1269 | struct hid_device *hid; |
131d3a7a | 1270 | unsigned int n, has_in = 0; |
c500c971 JS |
1271 | size_t len; |
1272 | int ret; | |
1da177e4 | 1273 | |
58037eb9 | 1274 | dbg_hid("HID probe called for ifnum %d\n", |
1da177e4 LT |
1275 | intf->altsetting->desc.bInterfaceNumber); |
1276 | ||
131d3a7a JS |
1277 | for (n = 0; n < interface->desc.bNumEndpoints; n++) |
1278 | if (usb_endpoint_is_int_in(&interface->endpoint[n].desc)) | |
1279 | has_in++; | |
1280 | if (!has_in) { | |
4291ee30 | 1281 | hid_err(intf, "couldn't find an input interrupt endpoint\n"); |
131d3a7a JS |
1282 | return -ENODEV; |
1283 | } | |
1284 | ||
c500c971 JS |
1285 | hid = hid_allocate_device(); |
1286 | if (IS_ERR(hid)) | |
1287 | return PTR_ERR(hid); | |
1da177e4 LT |
1288 | |
1289 | usb_set_intfdata(intf, hid); | |
c500c971 | 1290 | hid->ll_driver = &usb_hid_driver; |
76483cf4 | 1291 | hid->ff_init = hid_pidff_init; |
c500c971 | 1292 | #ifdef CONFIG_USB_HIDDEV |
93c10132 | 1293 | hid->hiddev_connect = hiddev_connect; |
c4c259bc | 1294 | hid->hiddev_disconnect = hiddev_disconnect; |
c500c971 JS |
1295 | hid->hiddev_hid_event = hiddev_hid_event; |
1296 | hid->hiddev_report_event = hiddev_report_event; | |
1297 | #endif | |
1298 | hid->dev.parent = &intf->dev; | |
1299 | hid->bus = BUS_USB; | |
1300 | hid->vendor = le16_to_cpu(dev->descriptor.idVendor); | |
1301 | hid->product = le16_to_cpu(dev->descriptor.idProduct); | |
1302 | hid->name[0] = 0; | |
b5e5a37e | 1303 | hid->quirks = usbhid_lookup_quirk(hid->vendor, hid->product); |
a73a6370 JS |
1304 | if (intf->cur_altsetting->desc.bInterfaceProtocol == |
1305 | USB_INTERFACE_PROTOCOL_MOUSE) | |
1306 | hid->type = HID_TYPE_USBMOUSE; | |
6dc1418e TS |
1307 | else if (intf->cur_altsetting->desc.bInterfaceProtocol == 0) |
1308 | hid->type = HID_TYPE_USBNONE; | |
1da177e4 | 1309 | |
c500c971 JS |
1310 | if (dev->manufacturer) |
1311 | strlcpy(hid->name, dev->manufacturer, sizeof(hid->name)); | |
1da177e4 | 1312 | |
c500c971 JS |
1313 | if (dev->product) { |
1314 | if (dev->manufacturer) | |
1315 | strlcat(hid->name, " ", sizeof(hid->name)); | |
1316 | strlcat(hid->name, dev->product, sizeof(hid->name)); | |
1da177e4 LT |
1317 | } |
1318 | ||
c500c971 JS |
1319 | if (!strlen(hid->name)) |
1320 | snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x", | |
1321 | le16_to_cpu(dev->descriptor.idVendor), | |
1322 | le16_to_cpu(dev->descriptor.idProduct)); | |
1da177e4 | 1323 | |
c500c971 JS |
1324 | usb_make_path(dev, hid->phys, sizeof(hid->phys)); |
1325 | strlcat(hid->phys, "/input", sizeof(hid->phys)); | |
1326 | len = strlen(hid->phys); | |
1327 | if (len < sizeof(hid->phys) - 1) | |
1328 | snprintf(hid->phys + len, sizeof(hid->phys) - len, | |
1329 | "%d", intf->altsetting[0].desc.bInterfaceNumber); | |
1330 | ||
1331 | if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0) | |
1332 | hid->uniq[0] = 0; | |
1da177e4 | 1333 | |
3d5afd32 JS |
1334 | usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL); |
1335 | if (usbhid == NULL) { | |
1336 | ret = -ENOMEM; | |
1337 | goto err; | |
1338 | } | |
1339 | ||
1340 | hid->driver_data = usbhid; | |
1341 | usbhid->hid = hid; | |
57ab12e4 JK |
1342 | usbhid->intf = intf; |
1343 | usbhid->ifnum = interface->desc.bInterfaceNumber; | |
3d5afd32 | 1344 | |
fde4e2f7 AS |
1345 | init_waitqueue_head(&usbhid->wait); |
1346 | INIT_WORK(&usbhid->reset_work, hid_reset); | |
fde4e2f7 AS |
1347 | setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid); |
1348 | spin_lock_init(&usbhid->lock); | |
1349 | ||
85cdaf52 JS |
1350 | ret = hid_add_device(hid); |
1351 | if (ret) { | |
d458a9df | 1352 | if (ret != -ENODEV) |
4291ee30 | 1353 | hid_err(intf, "can't add hid device: %d\n", ret); |
3d5afd32 | 1354 | goto err_free; |
85cdaf52 | 1355 | } |
c500c971 JS |
1356 | |
1357 | return 0; | |
3d5afd32 JS |
1358 | err_free: |
1359 | kfree(usbhid); | |
c500c971 JS |
1360 | err: |
1361 | hid_destroy_device(hid); | |
85cdaf52 | 1362 | return ret; |
1da177e4 LT |
1363 | } |
1364 | ||
c4c259bc | 1365 | static void usbhid_disconnect(struct usb_interface *intf) |
c500c971 JS |
1366 | { |
1367 | struct hid_device *hid = usb_get_intfdata(intf); | |
3d5afd32 | 1368 | struct usbhid_device *usbhid; |
c500c971 JS |
1369 | |
1370 | if (WARN_ON(!hid)) | |
1371 | return; | |
1372 | ||
3d5afd32 | 1373 | usbhid = hid->driver_data; |
46df9ded RA |
1374 | spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */ |
1375 | set_bit(HID_DISCONNECTED, &usbhid->iofl); | |
1376 | spin_unlock_irq(&usbhid->lock); | |
c500c971 | 1377 | hid_destroy_device(hid); |
3d5afd32 | 1378 | kfree(usbhid); |
c500c971 JS |
1379 | } |
1380 | ||
0361a28d ON |
1381 | static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid) |
1382 | { | |
1383 | del_timer_sync(&usbhid->io_retry); | |
0361a28d ON |
1384 | cancel_work_sync(&usbhid->reset_work); |
1385 | } | |
1386 | ||
1387 | static void hid_cease_io(struct usbhid_device *usbhid) | |
1388 | { | |
fad9fbe8 | 1389 | del_timer_sync(&usbhid->io_retry); |
0361a28d ON |
1390 | usb_kill_urb(usbhid->urbin); |
1391 | usb_kill_urb(usbhid->urbctrl); | |
1392 | usb_kill_urb(usbhid->urbout); | |
0361a28d ON |
1393 | } |
1394 | ||
ae2f0074 JK |
1395 | /* Treat USB reset pretty much the same as suspend/resume */ |
1396 | static int hid_pre_reset(struct usb_interface *intf) | |
1397 | { | |
1398 | struct hid_device *hid = usb_get_intfdata(intf); | |
1399 | struct usbhid_device *usbhid = hid->driver_data; | |
1400 | ||
1401 | spin_lock_irq(&usbhid->lock); | |
1402 | set_bit(HID_RESET_PENDING, &usbhid->iofl); | |
1403 | spin_unlock_irq(&usbhid->lock); | |
1404 | hid_cease_io(usbhid); | |
1405 | ||
1406 | return 0; | |
1407 | } | |
1408 | ||
1409 | /* Same routine used for post_reset and reset_resume */ | |
1410 | static int hid_post_reset(struct usb_interface *intf) | |
1411 | { | |
1412 | struct usb_device *dev = interface_to_usbdev (intf); | |
1413 | struct hid_device *hid = usb_get_intfdata(intf); | |
1414 | struct usbhid_device *usbhid = hid->driver_data; | |
dc3c78e4 | 1415 | struct usb_host_interface *interface = intf->cur_altsetting; |
ae2f0074 | 1416 | int status; |
dc3c78e4 SH |
1417 | char *rdesc; |
1418 | ||
1419 | /* Fetch and examine the HID report descriptor. If this | |
1420 | * has changed, then rebind. Since usbcore's check of the | |
1421 | * configuration descriptors passed, we already know that | |
1422 | * the size of the HID report descriptor has not changed. | |
1423 | */ | |
86e6b77e | 1424 | rdesc = kmalloc(hid->dev_rsize, GFP_KERNEL); |
dc3c78e4 SH |
1425 | if (!rdesc) { |
1426 | dbg_hid("couldn't allocate rdesc memory (post_reset)\n"); | |
1427 | return 1; | |
1428 | } | |
1429 | status = hid_get_class_descriptor(dev, | |
1430 | interface->desc.bInterfaceNumber, | |
86e6b77e | 1431 | HID_DT_REPORT, rdesc, hid->dev_rsize); |
dc3c78e4 SH |
1432 | if (status < 0) { |
1433 | dbg_hid("reading report descriptor failed (post_reset)\n"); | |
1434 | kfree(rdesc); | |
1435 | return 1; | |
1436 | } | |
86e6b77e | 1437 | status = memcmp(rdesc, hid->dev_rdesc, hid->dev_rsize); |
dc3c78e4 SH |
1438 | kfree(rdesc); |
1439 | if (status != 0) { | |
1440 | dbg_hid("report descriptor changed\n"); | |
1441 | return 1; | |
1442 | } | |
70fa9f2e | 1443 | |
ae2f0074 JK |
1444 | spin_lock_irq(&usbhid->lock); |
1445 | clear_bit(HID_RESET_PENDING, &usbhid->iofl); | |
1446 | spin_unlock_irq(&usbhid->lock); | |
1447 | hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0); | |
ae2f0074 JK |
1448 | status = hid_start_in(hid); |
1449 | if (status < 0) | |
1450 | hid_io_error(hid); | |
1451 | usbhid_restart_queues(usbhid); | |
1452 | ||
1453 | return 0; | |
1454 | } | |
1455 | ||
1456 | int usbhid_get_power(struct hid_device *hid) | |
1457 | { | |
1458 | struct usbhid_device *usbhid = hid->driver_data; | |
70fa9f2e | 1459 | |
ae2f0074 JK |
1460 | return usb_autopm_get_interface(usbhid->intf); |
1461 | } | |
1462 | ||
1463 | void usbhid_put_power(struct hid_device *hid) | |
1464 | { | |
1465 | struct usbhid_device *usbhid = hid->driver_data; | |
70fa9f2e | 1466 | |
ae2f0074 JK |
1467 | usb_autopm_put_interface(usbhid->intf); |
1468 | } | |
1469 | ||
1470 | ||
0f6f1407 | 1471 | #ifdef CONFIG_PM |
eb055fd0 AS |
1472 | static int hid_resume_common(struct hid_device *hid, bool driver_suspended) |
1473 | { | |
1474 | struct usbhid_device *usbhid = hid->driver_data; | |
1475 | int status; | |
1476 | ||
1477 | spin_lock_irq(&usbhid->lock); | |
1478 | clear_bit(HID_SUSPENDED, &usbhid->iofl); | |
1479 | usbhid_mark_busy(usbhid); | |
1480 | ||
1481 | if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) || | |
1482 | test_bit(HID_RESET_PENDING, &usbhid->iofl)) | |
1483 | schedule_work(&usbhid->reset_work); | |
1484 | usbhid->retry_delay = 0; | |
1485 | ||
1486 | usbhid_restart_queues(usbhid); | |
1487 | spin_unlock_irq(&usbhid->lock); | |
1488 | ||
1489 | status = hid_start_in(hid); | |
1490 | if (status < 0) | |
1491 | hid_io_error(hid); | |
1492 | ||
1493 | if (driver_suspended && hid->driver && hid->driver->resume) | |
1494 | status = hid->driver->resume(hid); | |
1495 | return status; | |
1496 | } | |
1497 | ||
27d72e85 | 1498 | static int hid_suspend(struct usb_interface *intf, pm_message_t message) |
1da177e4 | 1499 | { |
0361a28d | 1500 | struct hid_device *hid = usb_get_intfdata(intf); |
4916b3a5 | 1501 | struct usbhid_device *usbhid = hid->driver_data; |
37093b70 | 1502 | int status = 0; |
eb055fd0 | 1503 | bool driver_suspended = false; |
bfde79cb | 1504 | unsigned int ledcount; |
1da177e4 | 1505 | |
5b1b0b81 | 1506 | if (PMSG_IS_AUTO(message)) { |
bfde79cb | 1507 | ledcount = hidinput_count_leds(hid); |
0361a28d ON |
1508 | spin_lock_irq(&usbhid->lock); /* Sync with error handler */ |
1509 | if (!test_bit(HID_RESET_PENDING, &usbhid->iofl) | |
1510 | && !test_bit(HID_CLEAR_HALT, &usbhid->iofl) | |
1511 | && !test_bit(HID_OUT_RUNNING, &usbhid->iofl) | |
1512 | && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl) | |
1513 | && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl) | |
bfde79cb | 1514 | && (!ledcount || ignoreled)) |
0361a28d | 1515 | { |
f2b5264d | 1516 | set_bit(HID_SUSPENDED, &usbhid->iofl); |
0361a28d | 1517 | spin_unlock_irq(&usbhid->lock); |
6a740aa4 BP |
1518 | if (hid->driver && hid->driver->suspend) { |
1519 | status = hid->driver->suspend(hid, message); | |
1520 | if (status < 0) | |
eb055fd0 | 1521 | goto failed; |
6a740aa4 | 1522 | } |
eb055fd0 | 1523 | driver_suspended = true; |
0361a28d ON |
1524 | } else { |
1525 | usbhid_mark_busy(usbhid); | |
1526 | spin_unlock_irq(&usbhid->lock); | |
1527 | return -EBUSY; | |
1528 | } | |
3d5afd32 | 1529 | |
0361a28d | 1530 | } else { |
37093b70 ML |
1531 | /* TODO: resume() might need to handle suspend failure */ |
1532 | if (hid->driver && hid->driver->suspend) | |
6a740aa4 | 1533 | status = hid->driver->suspend(hid, message); |
eb055fd0 | 1534 | driver_suspended = true; |
0361a28d | 1535 | spin_lock_irq(&usbhid->lock); |
f2b5264d | 1536 | set_bit(HID_SUSPENDED, &usbhid->iofl); |
0361a28d | 1537 | spin_unlock_irq(&usbhid->lock); |
37093b70 | 1538 | if (usbhid_wait_io(hid) < 0) |
eb055fd0 | 1539 | status = -EIO; |
0361a28d ON |
1540 | } |
1541 | ||
0361a28d ON |
1542 | hid_cancel_delayed_stuff(usbhid); |
1543 | hid_cease_io(usbhid); | |
1544 | ||
5b1b0b81 | 1545 | if (PMSG_IS_AUTO(message) && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) { |
0361a28d | 1546 | /* lost race against keypresses */ |
eb055fd0 AS |
1547 | status = -EBUSY; |
1548 | goto failed; | |
0361a28d | 1549 | } |
1da177e4 | 1550 | dev_dbg(&intf->dev, "suspend\n"); |
37093b70 | 1551 | return status; |
eb055fd0 AS |
1552 | |
1553 | failed: | |
1554 | hid_resume_common(hid, driver_suspended); | |
1555 | return status; | |
1da177e4 LT |
1556 | } |
1557 | ||
1558 | static int hid_resume(struct usb_interface *intf) | |
1559 | { | |
1560 | struct hid_device *hid = usb_get_intfdata (intf); | |
4916b3a5 | 1561 | struct usbhid_device *usbhid = hid->driver_data; |
1da177e4 LT |
1562 | int status; |
1563 | ||
fde5be35 | 1564 | if (!test_bit(HID_STARTED, &usbhid->iofl)) |
3d5afd32 | 1565 | return 0; |
3d5afd32 | 1566 | |
eb055fd0 | 1567 | status = hid_resume_common(hid, true); |
1da177e4 | 1568 | dev_dbg(&intf->dev, "resume status %d\n", status); |
f07600cf | 1569 | return 0; |
df9a1f48 AS |
1570 | } |
1571 | ||
378a0ede | 1572 | static int hid_reset_resume(struct usb_interface *intf) |
df9a1f48 | 1573 | { |
378a0ede ON |
1574 | struct hid_device *hid = usb_get_intfdata(intf); |
1575 | struct usbhid_device *usbhid = hid->driver_data; | |
6a740aa4 | 1576 | int status; |
df9a1f48 | 1577 | |
f2b5264d | 1578 | clear_bit(HID_SUSPENDED, &usbhid->iofl); |
6a740aa4 BP |
1579 | status = hid_post_reset(intf); |
1580 | if (status >= 0 && hid->driver && hid->driver->reset_resume) { | |
1581 | int ret = hid->driver->reset_resume(hid); | |
1582 | if (ret < 0) | |
1583 | status = ret; | |
1584 | } | |
1585 | return status; | |
df9a1f48 AS |
1586 | } |
1587 | ||
ae2f0074 | 1588 | #endif /* CONFIG_PM */ |
df9a1f48 | 1589 | |
d67dec5b | 1590 | static const struct usb_device_id hid_usb_ids[] = { |
1da177e4 LT |
1591 | { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS, |
1592 | .bInterfaceClass = USB_INTERFACE_CLASS_HID }, | |
1593 | { } /* Terminating entry */ | |
1594 | }; | |
1595 | ||
1596 | MODULE_DEVICE_TABLE (usb, hid_usb_ids); | |
1597 | ||
1598 | static struct usb_driver hid_driver = { | |
1da177e4 | 1599 | .name = "usbhid", |
c4c259bc JK |
1600 | .probe = usbhid_probe, |
1601 | .disconnect = usbhid_disconnect, | |
0f6f1407 | 1602 | #ifdef CONFIG_PM |
1da177e4 LT |
1603 | .suspend = hid_suspend, |
1604 | .resume = hid_resume, | |
378a0ede | 1605 | .reset_resume = hid_reset_resume, |
0f6f1407 | 1606 | #endif |
df9a1f48 AS |
1607 | .pre_reset = hid_pre_reset, |
1608 | .post_reset = hid_post_reset, | |
1da177e4 | 1609 | .id_table = hid_usb_ids, |
933e3187 | 1610 | .supports_autosuspend = 1, |
1da177e4 LT |
1611 | }; |
1612 | ||
8fe294ca GC |
1613 | struct usb_interface *usbhid_find_interface(int minor) |
1614 | { | |
1615 | return usb_find_interface(&hid_driver, minor); | |
1616 | } | |
1617 | ||
1da177e4 LT |
1618 | static int __init hid_init(void) |
1619 | { | |
0361a28d ON |
1620 | int retval = -ENOMEM; |
1621 | ||
876b9276 PW |
1622 | retval = usbhid_quirks_init(quirks_param); |
1623 | if (retval) | |
1624 | goto usbhid_quirks_init_fail; | |
1da177e4 LT |
1625 | retval = usb_register(&hid_driver); |
1626 | if (retval) | |
1627 | goto usb_register_fail; | |
ccabcd2d | 1628 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
1da177e4 LT |
1629 | |
1630 | return 0; | |
1631 | usb_register_fail: | |
876b9276 PW |
1632 | usbhid_quirks_exit(); |
1633 | usbhid_quirks_init_fail: | |
1da177e4 LT |
1634 | return retval; |
1635 | } | |
1636 | ||
1637 | static void __exit hid_exit(void) | |
1638 | { | |
1639 | usb_deregister(&hid_driver); | |
876b9276 | 1640 | usbhid_quirks_exit(); |
1da177e4 LT |
1641 | } |
1642 | ||
1643 | module_init(hid_init); | |
1644 | module_exit(hid_exit); | |
1645 | ||
88adb72b JK |
1646 | MODULE_AUTHOR("Andreas Gal"); |
1647 | MODULE_AUTHOR("Vojtech Pavlik"); | |
1648 | MODULE_AUTHOR("Jiri Kosina"); | |
1da177e4 LT |
1649 | MODULE_DESCRIPTION(DRIVER_DESC); |
1650 | MODULE_LICENSE(DRIVER_LICENSE); |