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Commit | Line | Data |
---|---|---|
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 PW |
60 | /* Quirks specified at module load time */ |
61 | static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL }; | |
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 ON |
84 | spin_lock_irqsave(&usbhid->lock, flags); |
85 | if (hid->open > 0 && | |
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; | |
011b15df | 119 | int rc = 0; |
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); | |
125 | hid_start_in(hid); | |
126 | } | |
1da177e4 | 127 | |
48b4554a JK |
128 | else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) { |
129 | dev_dbg(&usbhid->intf->dev, "resetting device\n"); | |
011b15df AS |
130 | rc = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf); |
131 | if (rc == 0) { | |
742120c6 | 132 | rc = usb_reset_device(hid_to_usb_dev(hid)); |
011b15df | 133 | usb_unlock_device(hid_to_usb_dev(hid)); |
1da177e4 | 134 | } |
48b4554a | 135 | clear_bit(HID_RESET_PENDING, &usbhid->iofl); |
1da177e4 LT |
136 | } |
137 | ||
48b4554a JK |
138 | switch (rc) { |
139 | case 0: | |
140 | if (!test_bit(HID_IN_RUNNING, &usbhid->iofl)) | |
141 | hid_io_error(hid); | |
142 | break; | |
143 | default: | |
4291ee30 JP |
144 | hid_err(hid, "can't reset device, %s-%s/input%d, status %d\n", |
145 | hid_to_usb_dev(hid)->bus->bus_name, | |
146 | hid_to_usb_dev(hid)->devpath, | |
147 | usbhid->ifnum, rc); | |
48b4554a JK |
148 | /* FALLTHROUGH */ |
149 | case -EHOSTUNREACH: | |
150 | case -ENODEV: | |
151 | case -EINTR: | |
152 | break; | |
1da177e4 | 153 | } |
1da177e4 LT |
154 | } |
155 | ||
48b4554a JK |
156 | /* Main I/O error handler */ |
157 | static void hid_io_error(struct hid_device *hid) | |
dde5845a | 158 | { |
48b4554a JK |
159 | unsigned long flags; |
160 | struct usbhid_device *usbhid = hid->driver_data; | |
dde5845a | 161 | |
0361a28d | 162 | spin_lock_irqsave(&usbhid->lock, flags); |
dde5845a | 163 | |
48b4554a | 164 | /* Stop when disconnected */ |
69626f23 | 165 | if (test_bit(HID_DISCONNECTED, &usbhid->iofl)) |
48b4554a | 166 | goto done; |
dde5845a | 167 | |
5e2a55f2 AS |
168 | /* If it has been a while since the last error, we'll assume |
169 | * this a brand new error and reset the retry timeout. */ | |
170 | if (time_after(jiffies, usbhid->stop_retry + HZ/2)) | |
171 | usbhid->retry_delay = 0; | |
172 | ||
48b4554a JK |
173 | /* When an error occurs, retry at increasing intervals */ |
174 | if (usbhid->retry_delay == 0) { | |
175 | usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */ | |
176 | usbhid->stop_retry = jiffies + msecs_to_jiffies(1000); | |
177 | } else if (usbhid->retry_delay < 100) | |
178 | usbhid->retry_delay *= 2; | |
dde5845a | 179 | |
48b4554a | 180 | if (time_after(jiffies, usbhid->stop_retry)) { |
4916b3a5 | 181 | |
a8c52b66 ON |
182 | /* Retries failed, so do a port reset unless we lack bandwidth*/ |
183 | if (test_bit(HID_NO_BANDWIDTH, &usbhid->iofl) | |
184 | && !test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) { | |
185 | ||
48b4554a JK |
186 | schedule_work(&usbhid->reset_work); |
187 | goto done; | |
188 | } | |
1da177e4 LT |
189 | } |
190 | ||
48b4554a JK |
191 | mod_timer(&usbhid->io_retry, |
192 | jiffies + msecs_to_jiffies(usbhid->retry_delay)); | |
193 | done: | |
0361a28d ON |
194 | spin_unlock_irqrestore(&usbhid->lock, flags); |
195 | } | |
196 | ||
197 | static void usbhid_mark_busy(struct usbhid_device *usbhid) | |
198 | { | |
199 | struct usb_interface *intf = usbhid->intf; | |
200 | ||
201 | usb_mark_last_busy(interface_to_usbdev(intf)); | |
202 | } | |
203 | ||
204 | static int usbhid_restart_out_queue(struct usbhid_device *usbhid) | |
205 | { | |
206 | struct hid_device *hid = usb_get_intfdata(usbhid->intf); | |
207 | int kicked; | |
f0befcd6 | 208 | int r; |
0361a28d | 209 | |
d4150c8f AS |
210 | if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) || |
211 | test_bit(HID_SUSPENDED, &usbhid->iofl)) | |
0361a28d ON |
212 | return 0; |
213 | ||
214 | if ((kicked = (usbhid->outhead != usbhid->outtail))) { | |
6cc203d7 | 215 | hid_dbg(hid, "Kicking head %d tail %d", usbhid->outhead, usbhid->outtail); |
f0befcd6 | 216 | |
01a7c984 | 217 | /* Try to wake up from autosuspend... */ |
f0befcd6 DK |
218 | r = usb_autopm_get_interface_async(usbhid->intf); |
219 | if (r < 0) | |
220 | return r; | |
01a7c984 AS |
221 | |
222 | /* | |
223 | * If still suspended, don't submit. Submission will | |
224 | * occur if/when resume drains the queue. | |
225 | */ | |
f2b5264d | 226 | if (test_bit(HID_SUSPENDED, &usbhid->iofl)) { |
01a7c984 AS |
227 | usb_autopm_put_interface_no_suspend(usbhid->intf); |
228 | return r; | |
229 | } | |
230 | ||
f0befcd6 DK |
231 | /* Asynchronously flush queue. */ |
232 | set_bit(HID_OUT_RUNNING, &usbhid->iofl); | |
0361a28d ON |
233 | if (hid_submit_out(hid)) { |
234 | clear_bit(HID_OUT_RUNNING, &usbhid->iofl); | |
f0befcd6 | 235 | usb_autopm_put_interface_async(usbhid->intf); |
0361a28d | 236 | } |
f0befcd6 | 237 | wake_up(&usbhid->wait); |
0361a28d ON |
238 | } |
239 | return kicked; | |
240 | } | |
241 | ||
242 | static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid) | |
243 | { | |
244 | struct hid_device *hid = usb_get_intfdata(usbhid->intf); | |
245 | int kicked; | |
f0befcd6 | 246 | int r; |
0361a28d ON |
247 | |
248 | WARN_ON(hid == NULL); | |
d4150c8f AS |
249 | if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) || |
250 | test_bit(HID_SUSPENDED, &usbhid->iofl)) | |
0361a28d ON |
251 | return 0; |
252 | ||
253 | if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) { | |
6cc203d7 | 254 | hid_dbg(hid, "Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail); |
f0befcd6 | 255 | |
01a7c984 | 256 | /* Try to wake up from autosuspend... */ |
f0befcd6 DK |
257 | r = usb_autopm_get_interface_async(usbhid->intf); |
258 | if (r < 0) | |
259 | return r; | |
01a7c984 AS |
260 | |
261 | /* | |
262 | * If still suspended, don't submit. Submission will | |
263 | * occur if/when resume drains the queue. | |
264 | */ | |
f2b5264d | 265 | if (test_bit(HID_SUSPENDED, &usbhid->iofl)) { |
01a7c984 AS |
266 | usb_autopm_put_interface_no_suspend(usbhid->intf); |
267 | return r; | |
268 | } | |
269 | ||
f0befcd6 DK |
270 | /* Asynchronously flush queue. */ |
271 | set_bit(HID_CTRL_RUNNING, &usbhid->iofl); | |
0361a28d ON |
272 | if (hid_submit_ctrl(hid)) { |
273 | clear_bit(HID_CTRL_RUNNING, &usbhid->iofl); | |
f0befcd6 | 274 | usb_autopm_put_interface_async(usbhid->intf); |
0361a28d | 275 | } |
f0befcd6 | 276 | wake_up(&usbhid->wait); |
0361a28d ON |
277 | } |
278 | return kicked; | |
1da177e4 LT |
279 | } |
280 | ||
48b4554a JK |
281 | /* |
282 | * Input interrupt completion handler. | |
283 | */ | |
854561b0 | 284 | |
48b4554a | 285 | static void hid_irq_in(struct urb *urb) |
1da177e4 | 286 | { |
48b4554a JK |
287 | struct hid_device *hid = urb->context; |
288 | struct usbhid_device *usbhid = hid->driver_data; | |
289 | int status; | |
1da177e4 | 290 | |
48b4554a | 291 | switch (urb->status) { |
880d29f1 | 292 | case 0: /* success */ |
0361a28d | 293 | usbhid_mark_busy(usbhid); |
880d29f1 JS |
294 | usbhid->retry_delay = 0; |
295 | hid_input_report(urb->context, HID_INPUT_REPORT, | |
296 | urb->transfer_buffer, | |
297 | urb->actual_length, 1); | |
0361a28d ON |
298 | /* |
299 | * autosuspend refused while keys are pressed | |
300 | * because most keyboards don't wake up when | |
301 | * a key is released | |
302 | */ | |
303 | if (hid_check_keys_pressed(hid)) | |
304 | set_bit(HID_KEYS_PRESSED, &usbhid->iofl); | |
305 | else | |
306 | clear_bit(HID_KEYS_PRESSED, &usbhid->iofl); | |
880d29f1 JS |
307 | break; |
308 | case -EPIPE: /* stall */ | |
0361a28d | 309 | usbhid_mark_busy(usbhid); |
880d29f1 JS |
310 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
311 | set_bit(HID_CLEAR_HALT, &usbhid->iofl); | |
312 | schedule_work(&usbhid->reset_work); | |
313 | return; | |
314 | case -ECONNRESET: /* unlink */ | |
315 | case -ENOENT: | |
316 | case -ESHUTDOWN: /* unplug */ | |
317 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); | |
318 | return; | |
319 | case -EILSEQ: /* protocol error or unplug */ | |
320 | case -EPROTO: /* protocol error or unplug */ | |
321 | case -ETIME: /* protocol error or unplug */ | |
322 | case -ETIMEDOUT: /* Should never happen, but... */ | |
0361a28d | 323 | usbhid_mark_busy(usbhid); |
880d29f1 JS |
324 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
325 | hid_io_error(hid); | |
326 | return; | |
327 | default: /* error */ | |
4291ee30 JP |
328 | hid_warn(urb->dev, "input irq status %d received\n", |
329 | urb->status); | |
48b4554a | 330 | } |
1da177e4 | 331 | |
48b4554a JK |
332 | status = usb_submit_urb(urb, GFP_ATOMIC); |
333 | if (status) { | |
334 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); | |
335 | if (status != -EPERM) { | |
4291ee30 JP |
336 | hid_err(hid, "can't resubmit intr, %s-%s/input%d, status %d\n", |
337 | hid_to_usb_dev(hid)->bus->bus_name, | |
338 | hid_to_usb_dev(hid)->devpath, | |
339 | usbhid->ifnum, status); | |
48b4554a JK |
340 | hid_io_error(hid); |
341 | } | |
342 | } | |
1da177e4 LT |
343 | } |
344 | ||
48b4554a | 345 | static int hid_submit_out(struct hid_device *hid) |
1da177e4 | 346 | { |
48b4554a | 347 | struct hid_report *report; |
f129ea6d | 348 | char *raw_report; |
4916b3a5 | 349 | struct usbhid_device *usbhid = hid->driver_data; |
68229689 | 350 | int r; |
4916b3a5 | 351 | |
f129ea6d AH |
352 | report = usbhid->out[usbhid->outtail].report; |
353 | raw_report = usbhid->out[usbhid->outtail].raw_report; | |
1da177e4 | 354 | |
f0befcd6 DK |
355 | usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + |
356 | 1 + (report->id > 0); | |
357 | usbhid->urbout->dev = hid_to_usb_dev(hid); | |
668160e5 AS |
358 | if (raw_report) { |
359 | memcpy(usbhid->outbuf, raw_report, | |
360 | usbhid->urbout->transfer_buffer_length); | |
361 | kfree(raw_report); | |
362 | usbhid->out[usbhid->outtail].raw_report = NULL; | |
363 | } | |
1d3e2023 | 364 | |
f0befcd6 | 365 | dbg_hid("submitting out urb\n"); |
d57cdcff | 366 | |
f0befcd6 DK |
367 | r = usb_submit_urb(usbhid->urbout, GFP_ATOMIC); |
368 | if (r < 0) { | |
369 | hid_err(hid, "usb_submit_urb(out) failed: %d\n", r); | |
370 | return r; | |
48b4554a | 371 | } |
f0befcd6 | 372 | usbhid->last_out = jiffies; |
48b4554a JK |
373 | return 0; |
374 | } | |
375 | ||
376 | static int hid_submit_ctrl(struct hid_device *hid) | |
1da177e4 LT |
377 | { |
378 | struct hid_report *report; | |
48b4554a | 379 | unsigned char dir; |
f129ea6d | 380 | char *raw_report; |
68229689 | 381 | int len, r; |
4916b3a5 | 382 | struct usbhid_device *usbhid = hid->driver_data; |
1da177e4 | 383 | |
48b4554a | 384 | report = usbhid->ctrl[usbhid->ctrltail].report; |
f129ea6d | 385 | raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report; |
48b4554a | 386 | dir = usbhid->ctrl[usbhid->ctrltail].dir; |
1da177e4 | 387 | |
f0befcd6 DK |
388 | len = ((report->size - 1) >> 3) + 1 + (report->id > 0); |
389 | if (dir == USB_DIR_OUT) { | |
390 | usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0); | |
391 | usbhid->urbctrl->transfer_buffer_length = len; | |
668160e5 AS |
392 | if (raw_report) { |
393 | memcpy(usbhid->ctrlbuf, raw_report, len); | |
394 | kfree(raw_report); | |
395 | usbhid->ctrl[usbhid->ctrltail].raw_report = NULL; | |
396 | } | |
f0befcd6 DK |
397 | } else { |
398 | int maxpacket, padlen; | |
399 | ||
400 | usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0); | |
401 | maxpacket = usb_maxpacket(hid_to_usb_dev(hid), | |
402 | usbhid->urbctrl->pipe, 0); | |
403 | if (maxpacket > 0) { | |
404 | padlen = DIV_ROUND_UP(len, maxpacket); | |
405 | padlen *= maxpacket; | |
406 | if (padlen > usbhid->bufsize) | |
407 | padlen = usbhid->bufsize; | |
408 | } else | |
409 | padlen = 0; | |
410 | usbhid->urbctrl->transfer_buffer_length = padlen; | |
48b4554a | 411 | } |
f0befcd6 DK |
412 | usbhid->urbctrl->dev = hid_to_usb_dev(hid); |
413 | ||
414 | usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir; | |
415 | usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : | |
416 | HID_REQ_GET_REPORT; | |
417 | usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | | |
418 | report->id); | |
419 | usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum); | |
420 | usbhid->cr->wLength = cpu_to_le16(len); | |
421 | ||
422 | dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n", | |
423 | usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : | |
424 | "Get_Report", | |
425 | usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength); | |
426 | ||
427 | r = usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC); | |
428 | if (r < 0) { | |
429 | hid_err(hid, "usb_submit_urb(ctrl) failed: %d\n", r); | |
430 | return r; | |
431 | } | |
432 | usbhid->last_ctrl = jiffies; | |
48b4554a JK |
433 | return 0; |
434 | } | |
1da177e4 | 435 | |
48b4554a JK |
436 | /* |
437 | * Output interrupt completion handler. | |
438 | */ | |
1da177e4 | 439 | |
48b4554a JK |
440 | static void hid_irq_out(struct urb *urb) |
441 | { | |
442 | struct hid_device *hid = urb->context; | |
443 | struct usbhid_device *usbhid = hid->driver_data; | |
444 | unsigned long flags; | |
445 | int unplug = 0; | |
1da177e4 | 446 | |
48b4554a | 447 | switch (urb->status) { |
880d29f1 JS |
448 | case 0: /* success */ |
449 | break; | |
450 | case -ESHUTDOWN: /* unplug */ | |
451 | unplug = 1; | |
452 | case -EILSEQ: /* protocol error or unplug */ | |
453 | case -EPROTO: /* protocol error or unplug */ | |
454 | case -ECONNRESET: /* unlink */ | |
455 | case -ENOENT: | |
456 | break; | |
457 | default: /* error */ | |
4291ee30 JP |
458 | hid_warn(urb->dev, "output irq status %d received\n", |
459 | urb->status); | |
48b4554a | 460 | } |
1da177e4 | 461 | |
0361a28d | 462 | spin_lock_irqsave(&usbhid->lock, flags); |
1da177e4 | 463 | |
93101af3 | 464 | if (unplug) { |
48b4554a | 465 | usbhid->outtail = usbhid->outhead; |
93101af3 | 466 | } else { |
48b4554a | 467 | usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1); |
1da177e4 | 468 | |
93101af3 AS |
469 | if (usbhid->outhead != usbhid->outtail && |
470 | hid_submit_out(hid) == 0) { | |
471 | /* Successfully submitted next urb in queue */ | |
472 | spin_unlock_irqrestore(&usbhid->lock, flags); | |
473 | return; | |
474 | } | |
48b4554a | 475 | } |
1da177e4 | 476 | |
48b4554a | 477 | clear_bit(HID_OUT_RUNNING, &usbhid->iofl); |
0361a28d | 478 | spin_unlock_irqrestore(&usbhid->lock, flags); |
68229689 | 479 | usb_autopm_put_interface_async(usbhid->intf); |
1d1bdd20 | 480 | wake_up(&usbhid->wait); |
48b4554a | 481 | } |
6345fdfd | 482 | |
48b4554a JK |
483 | /* |
484 | * Control pipe completion handler. | |
485 | */ | |
1da177e4 | 486 | |
48b4554a JK |
487 | static void hid_ctrl(struct urb *urb) |
488 | { | |
489 | struct hid_device *hid = urb->context; | |
490 | struct usbhid_device *usbhid = hid->driver_data; | |
0361a28d | 491 | int unplug = 0, status = urb->status; |
1da177e4 | 492 | |
0361a28d | 493 | spin_lock(&usbhid->lock); |
1da177e4 | 494 | |
0361a28d | 495 | switch (status) { |
880d29f1 JS |
496 | case 0: /* success */ |
497 | if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN) | |
498 | hid_input_report(urb->context, | |
499 | usbhid->ctrl[usbhid->ctrltail].report->type, | |
500 | urb->transfer_buffer, urb->actual_length, 0); | |
501 | break; | |
502 | case -ESHUTDOWN: /* unplug */ | |
503 | unplug = 1; | |
504 | case -EILSEQ: /* protocol error or unplug */ | |
505 | case -EPROTO: /* protocol error or unplug */ | |
506 | case -ECONNRESET: /* unlink */ | |
507 | case -ENOENT: | |
508 | case -EPIPE: /* report not available */ | |
509 | break; | |
510 | default: /* error */ | |
4291ee30 | 511 | hid_warn(urb->dev, "ctrl urb status %d received\n", status); |
48b4554a | 512 | } |
1da177e4 | 513 | |
93101af3 | 514 | if (unplug) { |
48b4554a | 515 | usbhid->ctrltail = usbhid->ctrlhead; |
93101af3 | 516 | } else { |
48b4554a | 517 | usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1); |
1da177e4 | 518 | |
93101af3 AS |
519 | if (usbhid->ctrlhead != usbhid->ctrltail && |
520 | hid_submit_ctrl(hid) == 0) { | |
521 | /* Successfully submitted next urb in queue */ | |
522 | spin_unlock(&usbhid->lock); | |
523 | return; | |
524 | } | |
48b4554a | 525 | } |
1da177e4 | 526 | |
48b4554a | 527 | clear_bit(HID_CTRL_RUNNING, &usbhid->iofl); |
0361a28d | 528 | spin_unlock(&usbhid->lock); |
68229689 | 529 | usb_autopm_put_interface_async(usbhid->intf); |
1d1bdd20 | 530 | wake_up(&usbhid->wait); |
48b4554a | 531 | } |
1da177e4 | 532 | |
52cfc61b HS |
533 | static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report, |
534 | unsigned char dir) | |
48b4554a JK |
535 | { |
536 | int head; | |
48b4554a | 537 | struct usbhid_device *usbhid = hid->driver_data; |
f129ea6d | 538 | int len = ((report->size - 1) >> 3) + 1 + (report->id > 0); |
1da177e4 | 539 | |
48b4554a JK |
540 | if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN) |
541 | return; | |
b857c651 | 542 | |
48b4554a | 543 | if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) { |
48b4554a | 544 | if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) { |
4291ee30 | 545 | hid_warn(hid, "output queue full\n"); |
48b4554a JK |
546 | return; |
547 | } | |
1da177e4 | 548 | |
f129ea6d AH |
549 | usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC); |
550 | if (!usbhid->out[usbhid->outhead].raw_report) { | |
4291ee30 | 551 | hid_warn(hid, "output queueing failed\n"); |
f129ea6d AH |
552 | return; |
553 | } | |
554 | hid_output_report(report, usbhid->out[usbhid->outhead].raw_report); | |
555 | usbhid->out[usbhid->outhead].report = report; | |
48b4554a | 556 | usbhid->outhead = head; |
4871d3be | 557 | |
01a7c984 AS |
558 | /* If the queue isn't running, restart it */ |
559 | if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl)) { | |
560 | usbhid_restart_out_queue(usbhid); | |
f0befcd6 | 561 | |
01a7c984 AS |
562 | /* Otherwise see if an earlier request has timed out */ |
563 | } else if (time_after(jiffies, usbhid->last_out + HZ * 5)) { | |
564 | ||
565 | /* Prevent autosuspend following the unlink */ | |
566 | usb_autopm_get_interface_no_resume(usbhid->intf); | |
f0befcd6 | 567 | |
858155fb | 568 | /* |
01a7c984 AS |
569 | * Prevent resubmission in case the URB completes |
570 | * before we can unlink it. We don't want to cancel | |
571 | * the wrong transfer! | |
858155fb | 572 | */ |
01a7c984 AS |
573 | usb_block_urb(usbhid->urbout); |
574 | ||
575 | /* Drop lock to avoid deadlock if the callback runs */ | |
576 | spin_unlock(&usbhid->lock); | |
577 | ||
578 | usb_unlink_urb(usbhid->urbout); | |
579 | spin_lock(&usbhid->lock); | |
580 | usb_unblock_urb(usbhid->urbout); | |
581 | ||
582 | /* Unlink might have stopped the queue */ | |
583 | if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl)) | |
584 | usbhid_restart_out_queue(usbhid); | |
585 | ||
586 | /* Now we can allow autosuspend again */ | |
587 | usb_autopm_put_interface_async(usbhid->intf); | |
858155fb | 588 | } |
48b4554a JK |
589 | return; |
590 | } | |
1da177e4 | 591 | |
48b4554a | 592 | if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) { |
4291ee30 | 593 | hid_warn(hid, "control queue full\n"); |
48b4554a JK |
594 | return; |
595 | } | |
8fd80133 | 596 | |
f129ea6d AH |
597 | if (dir == USB_DIR_OUT) { |
598 | usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC); | |
599 | if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) { | |
4291ee30 | 600 | hid_warn(hid, "control queueing failed\n"); |
f129ea6d AH |
601 | return; |
602 | } | |
603 | hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report); | |
604 | } | |
48b4554a JK |
605 | usbhid->ctrl[usbhid->ctrlhead].report = report; |
606 | usbhid->ctrl[usbhid->ctrlhead].dir = dir; | |
607 | usbhid->ctrlhead = head; | |
8fd80133 | 608 | |
01a7c984 AS |
609 | /* If the queue isn't running, restart it */ |
610 | if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) { | |
611 | usbhid_restart_ctrl_queue(usbhid); | |
f0befcd6 | 612 | |
01a7c984 AS |
613 | /* Otherwise see if an earlier request has timed out */ |
614 | } else if (time_after(jiffies, usbhid->last_ctrl + HZ * 5)) { | |
615 | ||
616 | /* Prevent autosuspend following the unlink */ | |
617 | usb_autopm_get_interface_no_resume(usbhid->intf); | |
f0befcd6 | 618 | |
858155fb | 619 | /* |
01a7c984 AS |
620 | * Prevent resubmission in case the URB completes |
621 | * before we can unlink it. We don't want to cancel | |
622 | * the wrong transfer! | |
858155fb | 623 | */ |
01a7c984 AS |
624 | usb_block_urb(usbhid->urbctrl); |
625 | ||
626 | /* Drop lock to avoid deadlock if the callback runs */ | |
627 | spin_unlock(&usbhid->lock); | |
628 | ||
629 | usb_unlink_urb(usbhid->urbctrl); | |
630 | spin_lock(&usbhid->lock); | |
631 | usb_unblock_urb(usbhid->urbctrl); | |
632 | ||
633 | /* Unlink might have stopped the queue */ | |
634 | if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) | |
635 | usbhid_restart_ctrl_queue(usbhid); | |
636 | ||
637 | /* Now we can allow autosuspend again */ | |
638 | usb_autopm_put_interface_async(usbhid->intf); | |
858155fb | 639 | } |
0361a28d | 640 | } |
931e24b9 | 641 | |
d8814272 | 642 | static void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir) |
0361a28d ON |
643 | { |
644 | struct usbhid_device *usbhid = hid->driver_data; | |
645 | unsigned long flags; | |
931e24b9 | 646 | |
0361a28d ON |
647 | spin_lock_irqsave(&usbhid->lock, flags); |
648 | __usbhid_submit_report(hid, report, dir); | |
649 | spin_unlock_irqrestore(&usbhid->lock, flags); | |
48b4554a | 650 | } |
23b0d968 | 651 | |
4371ea82 DK |
652 | /* Workqueue routine to send requests to change LEDs */ |
653 | static void hid_led(struct work_struct *work) | |
654 | { | |
655 | struct usbhid_device *usbhid = | |
656 | container_of(work, struct usbhid_device, led_work); | |
657 | struct hid_device *hid = usbhid->hid; | |
658 | struct hid_field *field; | |
659 | unsigned long flags; | |
660 | ||
661 | field = hidinput_get_led_field(hid); | |
662 | if (!field) { | |
663 | hid_warn(hid, "LED event field not found\n"); | |
664 | return; | |
665 | } | |
666 | ||
667 | spin_lock_irqsave(&usbhid->lock, flags); | |
668 | if (!test_bit(HID_DISCONNECTED, &usbhid->iofl)) { | |
669 | usbhid->ledcount = hidinput_count_leds(hid); | |
670 | hid_dbg(usbhid->hid, "New ledcount = %u\n", usbhid->ledcount); | |
671 | __usbhid_submit_report(hid, field->report, USB_DIR_OUT); | |
672 | } | |
673 | spin_unlock_irqrestore(&usbhid->lock, flags); | |
674 | } | |
675 | ||
48b4554a JK |
676 | static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) |
677 | { | |
e0712985 | 678 | struct hid_device *hid = input_get_drvdata(dev); |
0361a28d | 679 | struct usbhid_device *usbhid = hid->driver_data; |
48b4554a | 680 | struct hid_field *field; |
0361a28d | 681 | unsigned long flags; |
48b4554a | 682 | int offset; |
41ad5fba | 683 | |
48b4554a JK |
684 | if (type == EV_FF) |
685 | return input_ff_event(dev, type, code, value); | |
8d2bad87 | 686 | |
48b4554a JK |
687 | if (type != EV_LED) |
688 | return -1; | |
5556feae | 689 | |
48b4554a | 690 | if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) { |
4291ee30 | 691 | hid_warn(dev, "event field not found\n"); |
48b4554a JK |
692 | return -1; |
693 | } | |
4a1a4d8b | 694 | |
4371ea82 | 695 | spin_lock_irqsave(&usbhid->lock, flags); |
48b4554a | 696 | hid_set_field(field, offset, value); |
4371ea82 DK |
697 | spin_unlock_irqrestore(&usbhid->lock, flags); |
698 | ||
699 | /* | |
700 | * Defer performing requested LED action. | |
701 | * This is more likely gather all LED changes into a single URB. | |
702 | */ | |
703 | schedule_work(&usbhid->led_work); | |
1da177e4 | 704 | |
48b4554a JK |
705 | return 0; |
706 | } | |
1da177e4 | 707 | |
48b4554a JK |
708 | int usbhid_wait_io(struct hid_device *hid) |
709 | { | |
710 | struct usbhid_device *usbhid = hid->driver_data; | |
25914662 | 711 | |
1d1bdd20 JS |
712 | if (!wait_event_timeout(usbhid->wait, |
713 | (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) && | |
714 | !test_bit(HID_OUT_RUNNING, &usbhid->iofl)), | |
48b4554a | 715 | 10*HZ)) { |
58037eb9 | 716 | dbg_hid("timeout waiting for ctrl or out queue to clear\n"); |
48b4554a JK |
717 | return -1; |
718 | } | |
1da177e4 | 719 | |
48b4554a JK |
720 | return 0; |
721 | } | |
b8c21cf6 | 722 | EXPORT_SYMBOL_GPL(usbhid_wait_io); |
53880546 | 723 | |
48b4554a JK |
724 | static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle) |
725 | { | |
726 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
727 | HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report, | |
728 | ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT); | |
729 | } | |
1da177e4 | 730 | |
48b4554a JK |
731 | static int hid_get_class_descriptor(struct usb_device *dev, int ifnum, |
732 | unsigned char type, void *buf, int size) | |
733 | { | |
734 | int result, retries = 4; | |
1da177e4 | 735 | |
48b4554a | 736 | memset(buf, 0, size); |
1da177e4 | 737 | |
48b4554a JK |
738 | do { |
739 | result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
740 | USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN, | |
741 | (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT); | |
742 | retries--; | |
743 | } while (result < size && retries); | |
744 | return result; | |
745 | } | |
940824b0 | 746 | |
48b4554a JK |
747 | int usbhid_open(struct hid_device *hid) |
748 | { | |
933e3187 | 749 | struct usbhid_device *usbhid = hid->driver_data; |
a8c52b66 | 750 | int res = 0; |
933e3187 | 751 | |
0361a28d | 752 | mutex_lock(&hid_open_mut); |
933e3187 ON |
753 | if (!hid->open++) { |
754 | res = usb_autopm_get_interface(usbhid->intf); | |
68229689 | 755 | /* the device must be awake to reliably request remote wakeup */ |
933e3187 ON |
756 | if (res < 0) { |
757 | hid->open--; | |
a8c52b66 ON |
758 | res = -EIO; |
759 | goto done; | |
933e3187 | 760 | } |
0361a28d | 761 | usbhid->intf->needs_remote_wakeup = 1; |
a8c52b66 ON |
762 | res = hid_start_in(hid); |
763 | if (res) { | |
764 | if (res != -ENOSPC) { | |
765 | hid_io_error(hid); | |
766 | res = 0; | |
767 | } else { | |
768 | /* no use opening if resources are insufficient */ | |
769 | hid->open--; | |
770 | res = -EBUSY; | |
771 | usbhid->intf->needs_remote_wakeup = 0; | |
772 | } | |
773 | } | |
0361a28d | 774 | usb_autopm_put_interface(usbhid->intf); |
933e3187 | 775 | } |
a8c52b66 | 776 | done: |
0361a28d | 777 | mutex_unlock(&hid_open_mut); |
a8c52b66 | 778 | return res; |
48b4554a | 779 | } |
a417a21e | 780 | |
48b4554a JK |
781 | void usbhid_close(struct hid_device *hid) |
782 | { | |
783 | struct usbhid_device *usbhid = hid->driver_data; | |
eab9edd2 | 784 | |
0361a28d ON |
785 | mutex_lock(&hid_open_mut); |
786 | ||
787 | /* protecting hid->open to make sure we don't restart | |
788 | * data acquistion due to a resumption we no longer | |
789 | * care about | |
790 | */ | |
791 | spin_lock_irq(&usbhid->lock); | |
933e3187 | 792 | if (!--hid->open) { |
0361a28d | 793 | spin_unlock_irq(&usbhid->lock); |
89092ddd | 794 | hid_cancel_delayed_stuff(usbhid); |
48b4554a | 795 | usb_kill_urb(usbhid->urbin); |
0361a28d ON |
796 | usbhid->intf->needs_remote_wakeup = 0; |
797 | } else { | |
798 | spin_unlock_irq(&usbhid->lock); | |
933e3187 | 799 | } |
0361a28d | 800 | mutex_unlock(&hid_open_mut); |
48b4554a | 801 | } |
1d3e2023 | 802 | |
48b4554a JK |
803 | /* |
804 | * Initialize all reports | |
805 | */ | |
41ad5fba | 806 | |
48b4554a JK |
807 | void usbhid_init_reports(struct hid_device *hid) |
808 | { | |
809 | struct hid_report *report; | |
810 | struct usbhid_device *usbhid = hid->driver_data; | |
811 | int err, ret; | |
41ad5fba | 812 | |
48b4554a JK |
813 | list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list) |
814 | usbhid_submit_report(hid, report, USB_DIR_IN); | |
5556feae | 815 | |
48b4554a JK |
816 | list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list) |
817 | usbhid_submit_report(hid, report, USB_DIR_IN); | |
4a1a4d8b | 818 | |
48b4554a JK |
819 | err = 0; |
820 | ret = usbhid_wait_io(hid); | |
821 | while (ret) { | |
822 | err |= ret; | |
823 | if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) | |
824 | usb_kill_urb(usbhid->urbctrl); | |
825 | if (test_bit(HID_OUT_RUNNING, &usbhid->iofl)) | |
826 | usb_kill_urb(usbhid->urbout); | |
827 | ret = usbhid_wait_io(hid); | |
828 | } | |
3f9b4076 | 829 | |
48b4554a | 830 | if (err) |
4291ee30 | 831 | hid_warn(hid, "timeout initializing reports\n"); |
48b4554a | 832 | } |
1da177e4 | 833 | |
713c8aad PZ |
834 | /* |
835 | * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01). | |
836 | */ | |
837 | static int hid_find_field_early(struct hid_device *hid, unsigned int page, | |
838 | unsigned int hid_code, struct hid_field **pfield) | |
839 | { | |
840 | struct hid_report *report; | |
841 | struct hid_field *field; | |
842 | struct hid_usage *usage; | |
843 | int i, j; | |
844 | ||
845 | list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { | |
846 | for (i = 0; i < report->maxfield; i++) { | |
847 | field = report->field[i]; | |
848 | for (j = 0; j < field->maxusage; j++) { | |
849 | usage = &field->usage[j]; | |
850 | if ((usage->hid & HID_USAGE_PAGE) == page && | |
851 | (usage->hid & 0xFFFF) == hid_code) { | |
852 | *pfield = field; | |
853 | return j; | |
854 | } | |
855 | } | |
856 | } | |
857 | } | |
858 | return -1; | |
859 | } | |
860 | ||
6edfa8dc | 861 | void usbhid_set_leds(struct hid_device *hid) |
713c8aad PZ |
862 | { |
863 | struct hid_field *field; | |
864 | int offset; | |
865 | ||
866 | if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) { | |
867 | hid_set_field(field, offset, 0); | |
868 | usbhid_submit_report(hid, field->report, USB_DIR_OUT); | |
869 | } | |
870 | } | |
6edfa8dc | 871 | EXPORT_SYMBOL_GPL(usbhid_set_leds); |
713c8aad | 872 | |
bf0964dc MH |
873 | /* |
874 | * Traverse the supplied list of reports and find the longest | |
875 | */ | |
282bfd4c JS |
876 | static void hid_find_max_report(struct hid_device *hid, unsigned int type, |
877 | unsigned int *max) | |
bf0964dc MH |
878 | { |
879 | struct hid_report *report; | |
282bfd4c | 880 | unsigned int size; |
bf0964dc MH |
881 | |
882 | list_for_each_entry(report, &hid->report_enum[type].report_list, list) { | |
efc7ce18 | 883 | size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered; |
bf0964dc MH |
884 | if (*max < size) |
885 | *max = size; | |
886 | } | |
887 | } | |
888 | ||
1da177e4 LT |
889 | static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid) |
890 | { | |
4916b3a5 JK |
891 | struct usbhid_device *usbhid = hid->driver_data; |
892 | ||
997ea58e | 893 | usbhid->inbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL, |
898089d0 | 894 | &usbhid->inbuf_dma); |
997ea58e | 895 | usbhid->outbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL, |
898089d0 | 896 | &usbhid->outbuf_dma); |
0ede76fc | 897 | usbhid->cr = kmalloc(sizeof(*usbhid->cr), GFP_KERNEL); |
997ea58e | 898 | usbhid->ctrlbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL, |
898089d0 JS |
899 | &usbhid->ctrlbuf_dma); |
900 | if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr || | |
901 | !usbhid->ctrlbuf) | |
1da177e4 LT |
902 | return -1; |
903 | ||
904 | return 0; | |
905 | } | |
906 | ||
b4dbde9d AO |
907 | static int usbhid_get_raw_report(struct hid_device *hid, |
908 | unsigned char report_number, __u8 *buf, size_t count, | |
909 | unsigned char report_type) | |
910 | { | |
911 | struct usbhid_device *usbhid = hid->driver_data; | |
912 | struct usb_device *dev = hid_to_usb_dev(hid); | |
913 | struct usb_interface *intf = usbhid->intf; | |
914 | struct usb_host_interface *interface = intf->cur_altsetting; | |
915 | int skipped_report_id = 0; | |
916 | int ret; | |
917 | ||
918 | /* Byte 0 is the report number. Report data starts at byte 1.*/ | |
919 | buf[0] = report_number; | |
920 | if (report_number == 0x0) { | |
921 | /* Offset the return buffer by 1, so that the report ID | |
922 | will remain in byte 0. */ | |
923 | buf++; | |
924 | count--; | |
925 | skipped_report_id = 1; | |
926 | } | |
927 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
928 | HID_REQ_GET_REPORT, | |
929 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
930 | ((report_type + 1) << 8) | report_number, | |
931 | interface->desc.bInterfaceNumber, buf, count, | |
932 | USB_CTRL_SET_TIMEOUT); | |
933 | ||
934 | /* count also the report id */ | |
935 | if (ret > 0 && skipped_report_id) | |
936 | ret++; | |
937 | ||
938 | return ret; | |
939 | } | |
940 | ||
d4bfa033 JK |
941 | static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count, |
942 | unsigned char report_type) | |
efc493f9 JK |
943 | { |
944 | struct usbhid_device *usbhid = hid->driver_data; | |
945 | struct usb_device *dev = hid_to_usb_dev(hid); | |
946 | struct usb_interface *intf = usbhid->intf; | |
947 | struct usb_host_interface *interface = intf->cur_altsetting; | |
948 | int ret; | |
949 | ||
fe2c91ee | 950 | if (usbhid->urbout && report_type != HID_FEATURE_REPORT) { |
a8ab5d58 AO |
951 | int actual_length; |
952 | int skipped_report_id = 0; | |
12e52725 | 953 | |
a8ab5d58 AO |
954 | if (buf[0] == 0x0) { |
955 | /* Don't send the Report ID */ | |
956 | buf++; | |
957 | count--; | |
958 | skipped_report_id = 1; | |
959 | } | |
960 | ret = usb_interrupt_msg(dev, usbhid->urbout->pipe, | |
961 | buf, count, &actual_length, | |
962 | USB_CTRL_SET_TIMEOUT); | |
963 | /* return the number of bytes transferred */ | |
964 | if (ret == 0) { | |
965 | ret = actual_length; | |
966 | /* count also the report id */ | |
967 | if (skipped_report_id) | |
968 | ret++; | |
969 | } | |
970 | } else { | |
29129a98 | 971 | int skipped_report_id = 0; |
c29771c2 | 972 | int report_id = buf[0]; |
29129a98 AO |
973 | if (buf[0] == 0x0) { |
974 | /* Don't send the Report ID */ | |
975 | buf++; | |
976 | count--; | |
977 | skipped_report_id = 1; | |
978 | } | |
a8ab5d58 AO |
979 | ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
980 | HID_REQ_SET_REPORT, | |
981 | USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
c29771c2 | 982 | ((report_type + 1) << 8) | report_id, |
29129a98 | 983 | interface->desc.bInterfaceNumber, buf, count, |
a8ab5d58 | 984 | USB_CTRL_SET_TIMEOUT); |
29129a98 AO |
985 | /* count also the report id, if this was a numbered report. */ |
986 | if (ret > 0 && skipped_report_id) | |
a8ab5d58 AO |
987 | ret++; |
988 | } | |
efc493f9 JK |
989 | |
990 | return ret; | |
991 | } | |
992 | ||
0361a28d ON |
993 | static void usbhid_restart_queues(struct usbhid_device *usbhid) |
994 | { | |
eb055fd0 | 995 | if (usbhid->urbout && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)) |
0361a28d | 996 | usbhid_restart_out_queue(usbhid); |
eb055fd0 AS |
997 | if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) |
998 | usbhid_restart_ctrl_queue(usbhid); | |
0361a28d ON |
999 | } |
1000 | ||
1da177e4 LT |
1001 | static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid) |
1002 | { | |
4916b3a5 JK |
1003 | struct usbhid_device *usbhid = hid->driver_data; |
1004 | ||
997ea58e DM |
1005 | usb_free_coherent(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma); |
1006 | usb_free_coherent(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma); | |
0ede76fc | 1007 | kfree(usbhid->cr); |
997ea58e | 1008 | usb_free_coherent(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma); |
1da177e4 LT |
1009 | } |
1010 | ||
c500c971 JS |
1011 | static int usbhid_parse(struct hid_device *hid) |
1012 | { | |
1013 | struct usb_interface *intf = to_usb_interface(hid->dev.parent); | |
1da177e4 LT |
1014 | struct usb_host_interface *interface = intf->cur_altsetting; |
1015 | struct usb_device *dev = interface_to_usbdev (intf); | |
1016 | struct hid_descriptor *hdesc; | |
2eb5dc30 | 1017 | u32 quirks = 0; |
c500c971 | 1018 | unsigned int rsize = 0; |
c5b7c7c3 | 1019 | char *rdesc; |
c500c971 | 1020 | int ret, n; |
1da177e4 | 1021 | |
2eb5dc30 PW |
1022 | quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor), |
1023 | le16_to_cpu(dev->descriptor.idProduct)); | |
1da177e4 | 1024 | |
6f4303fb JK |
1025 | if (quirks & HID_QUIRK_IGNORE) |
1026 | return -ENODEV; | |
1027 | ||
0f28b55d AS |
1028 | /* Many keyboards and mice don't like to be polled for reports, |
1029 | * so we will always set the HID_QUIRK_NOGET flag for them. */ | |
1030 | if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) { | |
1031 | if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD || | |
1032 | interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE) | |
1033 | quirks |= HID_QUIRK_NOGET; | |
1034 | } | |
1035 | ||
c5b7c7c3 DT |
1036 | if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) && |
1037 | (!interface->desc.bNumEndpoints || | |
1038 | usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) { | |
58037eb9 | 1039 | dbg_hid("class descriptor not present\n"); |
c500c971 | 1040 | return -ENODEV; |
1da177e4 LT |
1041 | } |
1042 | ||
c500c971 JS |
1043 | hid->version = le16_to_cpu(hdesc->bcdHID); |
1044 | hid->country = hdesc->bCountryCode; | |
1045 | ||
1da177e4 LT |
1046 | for (n = 0; n < hdesc->bNumDescriptors; n++) |
1047 | if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT) | |
1048 | rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength); | |
1049 | ||
1050 | if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) { | |
58037eb9 | 1051 | dbg_hid("weird size of report descriptor (%u)\n", rsize); |
c500c971 | 1052 | return -EINVAL; |
1da177e4 LT |
1053 | } |
1054 | ||
1055 | if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) { | |
58037eb9 | 1056 | dbg_hid("couldn't allocate rdesc memory\n"); |
c500c971 | 1057 | return -ENOMEM; |
1da177e4 LT |
1058 | } |
1059 | ||
854561b0 VP |
1060 | hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0); |
1061 | ||
c500c971 JS |
1062 | ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber, |
1063 | HID_DT_REPORT, rdesc, rsize); | |
1064 | if (ret < 0) { | |
58037eb9 | 1065 | dbg_hid("reading report descriptor failed\n"); |
1da177e4 | 1066 | kfree(rdesc); |
c500c971 | 1067 | goto err; |
1da177e4 LT |
1068 | } |
1069 | ||
c500c971 JS |
1070 | ret = hid_parse_report(hid, rdesc, rsize); |
1071 | kfree(rdesc); | |
1072 | if (ret) { | |
58037eb9 | 1073 | dbg_hid("parsing report descriptor failed\n"); |
c500c971 | 1074 | goto err; |
1da177e4 LT |
1075 | } |
1076 | ||
f5208997 | 1077 | hid->quirks |= quirks; |
1da177e4 | 1078 | |
c500c971 JS |
1079 | return 0; |
1080 | err: | |
1081 | return ret; | |
1082 | } | |
1083 | ||
1084 | static int usbhid_start(struct hid_device *hid) | |
1085 | { | |
1086 | struct usb_interface *intf = to_usb_interface(hid->dev.parent); | |
1087 | struct usb_host_interface *interface = intf->cur_altsetting; | |
1088 | struct usb_device *dev = interface_to_usbdev(intf); | |
3d5afd32 | 1089 | struct usbhid_device *usbhid = hid->driver_data; |
c500c971 JS |
1090 | unsigned int n, insize = 0; |
1091 | int ret; | |
1092 | ||
e3e14de5 JS |
1093 | clear_bit(HID_DISCONNECTED, &usbhid->iofl); |
1094 | ||
4916b3a5 JK |
1095 | usbhid->bufsize = HID_MIN_BUFFER_SIZE; |
1096 | hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize); | |
1097 | hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize); | |
1098 | hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize); | |
bf0964dc | 1099 | |
4916b3a5 JK |
1100 | if (usbhid->bufsize > HID_MAX_BUFFER_SIZE) |
1101 | usbhid->bufsize = HID_MAX_BUFFER_SIZE; | |
bf0964dc MH |
1102 | |
1103 | hid_find_max_report(hid, HID_INPUT_REPORT, &insize); | |
1104 | ||
1105 | if (insize > HID_MAX_BUFFER_SIZE) | |
1106 | insize = HID_MAX_BUFFER_SIZE; | |
1107 | ||
c500c971 JS |
1108 | if (hid_alloc_buffers(dev, hid)) { |
1109 | ret = -ENOMEM; | |
1da177e4 | 1110 | goto fail; |
f345c37c PS |
1111 | } |
1112 | ||
1da177e4 | 1113 | for (n = 0; n < interface->desc.bNumEndpoints; n++) { |
1da177e4 LT |
1114 | struct usb_endpoint_descriptor *endpoint; |
1115 | int pipe; | |
1116 | int interval; | |
1117 | ||
1118 | endpoint = &interface->endpoint[n].desc; | |
581a2739 | 1119 | if (!usb_endpoint_xfer_int(endpoint)) |
1da177e4 LT |
1120 | continue; |
1121 | ||
1da177e4 | 1122 | interval = endpoint->bInterval; |
1da177e4 | 1123 | |
f345c37c | 1124 | /* Some vendors give fullspeed interval on highspeed devides */ |
c500c971 | 1125 | if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL && |
f345c37c PS |
1126 | dev->speed == USB_SPEED_HIGH) { |
1127 | interval = fls(endpoint->bInterval*8); | |
1128 | printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n", | |
1129 | hid->name, endpoint->bInterval, interval); | |
1130 | } | |
1131 | ||
1da177e4 LT |
1132 | /* Change the polling interval of mice. */ |
1133 | if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0) | |
1134 | interval = hid_mousepoll_interval; | |
05f091ab | 1135 | |
c500c971 | 1136 | ret = -ENOMEM; |
0f12aa03 | 1137 | if (usb_endpoint_dir_in(endpoint)) { |
4916b3a5 | 1138 | if (usbhid->urbin) |
1da177e4 | 1139 | continue; |
4916b3a5 | 1140 | if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL))) |
1da177e4 LT |
1141 | goto fail; |
1142 | pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress); | |
4916b3a5 | 1143 | usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize, |
1da177e4 | 1144 | hid_irq_in, hid, interval); |
4916b3a5 JK |
1145 | usbhid->urbin->transfer_dma = usbhid->inbuf_dma; |
1146 | usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1da177e4 | 1147 | } else { |
4916b3a5 | 1148 | if (usbhid->urbout) |
1da177e4 | 1149 | continue; |
4916b3a5 | 1150 | if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL))) |
1da177e4 LT |
1151 | goto fail; |
1152 | pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress); | |
4916b3a5 | 1153 | usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0, |
1da177e4 | 1154 | hid_irq_out, hid, interval); |
4916b3a5 JK |
1155 | usbhid->urbout->transfer_dma = usbhid->outbuf_dma; |
1156 | usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1da177e4 LT |
1157 | } |
1158 | } | |
1159 | ||
4916b3a5 | 1160 | usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL); |
c500c971 JS |
1161 | if (!usbhid->urbctrl) { |
1162 | ret = -ENOMEM; | |
1da177e4 | 1163 | goto fail; |
c500c971 | 1164 | } |
c5b7c7c3 | 1165 | |
4916b3a5 JK |
1166 | usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr, |
1167 | usbhid->ctrlbuf, 1, hid_ctrl, hid); | |
4916b3a5 | 1168 | usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma; |
0ede76fc | 1169 | usbhid->urbctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
c500c971 | 1170 | |
5b915d9e JK |
1171 | if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS)) |
1172 | usbhid_init_reports(hid); | |
93c10132 | 1173 | |
3d5afd32 | 1174 | set_bit(HID_STARTED, &usbhid->iofl); |
3d5afd32 | 1175 | |
08ef08ee AS |
1176 | /* Some keyboards don't work until their LEDs have been set. |
1177 | * Since BIOSes do set the LEDs, it must be safe for any device | |
1178 | * that supports the keyboard boot protocol. | |
3d61510f AS |
1179 | * In addition, enable remote wakeup by default for all keyboard |
1180 | * devices supporting the boot protocol. | |
08ef08ee AS |
1181 | */ |
1182 | if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT && | |
1183 | interface->desc.bInterfaceProtocol == | |
3d61510f | 1184 | USB_INTERFACE_PROTOCOL_KEYBOARD) { |
08ef08ee | 1185 | usbhid_set_leds(hid); |
3d61510f AS |
1186 | device_set_wakeup_enable(&dev->dev, 1); |
1187 | } | |
c500c971 | 1188 | return 0; |
1da177e4 LT |
1189 | |
1190 | fail: | |
4916b3a5 JK |
1191 | usb_free_urb(usbhid->urbin); |
1192 | usb_free_urb(usbhid->urbout); | |
1193 | usb_free_urb(usbhid->urbctrl); | |
e3e14de5 JS |
1194 | usbhid->urbin = NULL; |
1195 | usbhid->urbout = NULL; | |
1196 | usbhid->urbctrl = NULL; | |
22f675f3 | 1197 | hid_free_buffers(dev, hid); |
c500c971 | 1198 | return ret; |
1da177e4 LT |
1199 | } |
1200 | ||
c500c971 | 1201 | static void usbhid_stop(struct hid_device *hid) |
1da177e4 | 1202 | { |
c500c971 | 1203 | struct usbhid_device *usbhid = hid->driver_data; |
1da177e4 | 1204 | |
c500c971 | 1205 | if (WARN_ON(!usbhid)) |
1da177e4 LT |
1206 | return; |
1207 | ||
3d5afd32 | 1208 | clear_bit(HID_STARTED, &usbhid->iofl); |
4371ea82 | 1209 | spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */ |
69626f23 | 1210 | set_bit(HID_DISCONNECTED, &usbhid->iofl); |
0361a28d | 1211 | spin_unlock_irq(&usbhid->lock); |
4916b3a5 JK |
1212 | usb_kill_urb(usbhid->urbin); |
1213 | usb_kill_urb(usbhid->urbout); | |
1214 | usb_kill_urb(usbhid->urbctrl); | |
1da177e4 | 1215 | |
0361a28d | 1216 | hid_cancel_delayed_stuff(usbhid); |
aef4e266 | 1217 | |
c500c971 JS |
1218 | hid->claimed = 0; |
1219 | ||
4916b3a5 JK |
1220 | usb_free_urb(usbhid->urbin); |
1221 | usb_free_urb(usbhid->urbctrl); | |
1222 | usb_free_urb(usbhid->urbout); | |
e3e14de5 JS |
1223 | usbhid->urbin = NULL; /* don't mess up next start */ |
1224 | usbhid->urbctrl = NULL; | |
1225 | usbhid->urbout = NULL; | |
1da177e4 | 1226 | |
be820975 | 1227 | hid_free_buffers(hid_to_usb_dev(hid), hid); |
1da177e4 LT |
1228 | } |
1229 | ||
0361a28d ON |
1230 | static int usbhid_power(struct hid_device *hid, int lvl) |
1231 | { | |
1232 | int r = 0; | |
1233 | ||
1234 | switch (lvl) { | |
1235 | case PM_HINT_FULLON: | |
1236 | r = usbhid_get_power(hid); | |
1237 | break; | |
1238 | case PM_HINT_NORMAL: | |
1239 | usbhid_put_power(hid); | |
1240 | break; | |
1241 | } | |
1242 | return r; | |
1243 | } | |
1244 | ||
e90a6df8 HR |
1245 | static void usbhid_request(struct hid_device *hid, struct hid_report *rep, int reqtype) |
1246 | { | |
1247 | switch (reqtype) { | |
1248 | case HID_REQ_GET_REPORT: | |
1249 | usbhid_submit_report(hid, rep, USB_DIR_IN); | |
1250 | break; | |
1251 | case HID_REQ_SET_REPORT: | |
1252 | usbhid_submit_report(hid, rep, USB_DIR_OUT); | |
1253 | break; | |
1254 | } | |
1255 | } | |
1256 | ||
c500c971 JS |
1257 | static struct hid_ll_driver usb_hid_driver = { |
1258 | .parse = usbhid_parse, | |
1259 | .start = usbhid_start, | |
1260 | .stop = usbhid_stop, | |
1261 | .open = usbhid_open, | |
1262 | .close = usbhid_close, | |
0361a28d | 1263 | .power = usbhid_power, |
c500c971 | 1264 | .hidinput_input_event = usb_hidinput_input_event, |
e90a6df8 | 1265 | .request = usbhid_request, |
3373443b | 1266 | .wait = usbhid_wait_io, |
c500c971 JS |
1267 | }; |
1268 | ||
c4c259bc | 1269 | static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id) |
1da177e4 | 1270 | { |
131d3a7a | 1271 | struct usb_host_interface *interface = intf->cur_altsetting; |
c500c971 | 1272 | struct usb_device *dev = interface_to_usbdev(intf); |
3d5afd32 | 1273 | struct usbhid_device *usbhid; |
1da177e4 | 1274 | struct hid_device *hid; |
131d3a7a | 1275 | unsigned int n, has_in = 0; |
c500c971 JS |
1276 | size_t len; |
1277 | int ret; | |
1da177e4 | 1278 | |
58037eb9 | 1279 | dbg_hid("HID probe called for ifnum %d\n", |
1da177e4 LT |
1280 | intf->altsetting->desc.bInterfaceNumber); |
1281 | ||
131d3a7a JS |
1282 | for (n = 0; n < interface->desc.bNumEndpoints; n++) |
1283 | if (usb_endpoint_is_int_in(&interface->endpoint[n].desc)) | |
1284 | has_in++; | |
1285 | if (!has_in) { | |
4291ee30 | 1286 | hid_err(intf, "couldn't find an input interrupt endpoint\n"); |
131d3a7a JS |
1287 | return -ENODEV; |
1288 | } | |
1289 | ||
c500c971 JS |
1290 | hid = hid_allocate_device(); |
1291 | if (IS_ERR(hid)) | |
1292 | return PTR_ERR(hid); | |
1da177e4 LT |
1293 | |
1294 | usb_set_intfdata(intf, hid); | |
c500c971 | 1295 | hid->ll_driver = &usb_hid_driver; |
b4dbde9d | 1296 | hid->hid_get_raw_report = usbhid_get_raw_report; |
c500c971 | 1297 | hid->hid_output_raw_report = usbhid_output_raw_report; |
76483cf4 | 1298 | hid->ff_init = hid_pidff_init; |
c500c971 | 1299 | #ifdef CONFIG_USB_HIDDEV |
93c10132 | 1300 | hid->hiddev_connect = hiddev_connect; |
c4c259bc | 1301 | hid->hiddev_disconnect = hiddev_disconnect; |
c500c971 JS |
1302 | hid->hiddev_hid_event = hiddev_hid_event; |
1303 | hid->hiddev_report_event = hiddev_report_event; | |
1304 | #endif | |
1305 | hid->dev.parent = &intf->dev; | |
1306 | hid->bus = BUS_USB; | |
1307 | hid->vendor = le16_to_cpu(dev->descriptor.idVendor); | |
1308 | hid->product = le16_to_cpu(dev->descriptor.idProduct); | |
1309 | hid->name[0] = 0; | |
b5e5a37e | 1310 | hid->quirks = usbhid_lookup_quirk(hid->vendor, hid->product); |
a73a6370 JS |
1311 | if (intf->cur_altsetting->desc.bInterfaceProtocol == |
1312 | USB_INTERFACE_PROTOCOL_MOUSE) | |
1313 | hid->type = HID_TYPE_USBMOUSE; | |
6dc1418e TS |
1314 | else if (intf->cur_altsetting->desc.bInterfaceProtocol == 0) |
1315 | hid->type = HID_TYPE_USBNONE; | |
1da177e4 | 1316 | |
c500c971 JS |
1317 | if (dev->manufacturer) |
1318 | strlcpy(hid->name, dev->manufacturer, sizeof(hid->name)); | |
1da177e4 | 1319 | |
c500c971 JS |
1320 | if (dev->product) { |
1321 | if (dev->manufacturer) | |
1322 | strlcat(hid->name, " ", sizeof(hid->name)); | |
1323 | strlcat(hid->name, dev->product, sizeof(hid->name)); | |
1da177e4 LT |
1324 | } |
1325 | ||
c500c971 JS |
1326 | if (!strlen(hid->name)) |
1327 | snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x", | |
1328 | le16_to_cpu(dev->descriptor.idVendor), | |
1329 | le16_to_cpu(dev->descriptor.idProduct)); | |
1da177e4 | 1330 | |
c500c971 JS |
1331 | usb_make_path(dev, hid->phys, sizeof(hid->phys)); |
1332 | strlcat(hid->phys, "/input", sizeof(hid->phys)); | |
1333 | len = strlen(hid->phys); | |
1334 | if (len < sizeof(hid->phys) - 1) | |
1335 | snprintf(hid->phys + len, sizeof(hid->phys) - len, | |
1336 | "%d", intf->altsetting[0].desc.bInterfaceNumber); | |
1337 | ||
1338 | if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0) | |
1339 | hid->uniq[0] = 0; | |
1da177e4 | 1340 | |
3d5afd32 JS |
1341 | usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL); |
1342 | if (usbhid == NULL) { | |
1343 | ret = -ENOMEM; | |
1344 | goto err; | |
1345 | } | |
1346 | ||
1347 | hid->driver_data = usbhid; | |
1348 | usbhid->hid = hid; | |
57ab12e4 JK |
1349 | usbhid->intf = intf; |
1350 | usbhid->ifnum = interface->desc.bInterfaceNumber; | |
3d5afd32 | 1351 | |
fde4e2f7 AS |
1352 | init_waitqueue_head(&usbhid->wait); |
1353 | INIT_WORK(&usbhid->reset_work, hid_reset); | |
fde4e2f7 AS |
1354 | setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid); |
1355 | spin_lock_init(&usbhid->lock); | |
1356 | ||
4371ea82 DK |
1357 | INIT_WORK(&usbhid->led_work, hid_led); |
1358 | ||
85cdaf52 JS |
1359 | ret = hid_add_device(hid); |
1360 | if (ret) { | |
d458a9df | 1361 | if (ret != -ENODEV) |
4291ee30 | 1362 | hid_err(intf, "can't add hid device: %d\n", ret); |
3d5afd32 | 1363 | goto err_free; |
85cdaf52 | 1364 | } |
c500c971 JS |
1365 | |
1366 | return 0; | |
3d5afd32 JS |
1367 | err_free: |
1368 | kfree(usbhid); | |
c500c971 JS |
1369 | err: |
1370 | hid_destroy_device(hid); | |
85cdaf52 | 1371 | return ret; |
1da177e4 LT |
1372 | } |
1373 | ||
c4c259bc | 1374 | static void usbhid_disconnect(struct usb_interface *intf) |
c500c971 JS |
1375 | { |
1376 | struct hid_device *hid = usb_get_intfdata(intf); | |
3d5afd32 | 1377 | struct usbhid_device *usbhid; |
c500c971 JS |
1378 | |
1379 | if (WARN_ON(!hid)) | |
1380 | return; | |
1381 | ||
3d5afd32 | 1382 | usbhid = hid->driver_data; |
c500c971 | 1383 | hid_destroy_device(hid); |
3d5afd32 | 1384 | kfree(usbhid); |
c500c971 JS |
1385 | } |
1386 | ||
0361a28d ON |
1387 | static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid) |
1388 | { | |
1389 | del_timer_sync(&usbhid->io_retry); | |
0361a28d | 1390 | cancel_work_sync(&usbhid->reset_work); |
4371ea82 | 1391 | cancel_work_sync(&usbhid->led_work); |
0361a28d ON |
1392 | } |
1393 | ||
1394 | static void hid_cease_io(struct usbhid_device *usbhid) | |
1395 | { | |
fad9fbe8 | 1396 | del_timer_sync(&usbhid->io_retry); |
0361a28d ON |
1397 | usb_kill_urb(usbhid->urbin); |
1398 | usb_kill_urb(usbhid->urbctrl); | |
1399 | usb_kill_urb(usbhid->urbout); | |
0361a28d ON |
1400 | } |
1401 | ||
ae2f0074 JK |
1402 | /* Treat USB reset pretty much the same as suspend/resume */ |
1403 | static int hid_pre_reset(struct usb_interface *intf) | |
1404 | { | |
1405 | struct hid_device *hid = usb_get_intfdata(intf); | |
1406 | struct usbhid_device *usbhid = hid->driver_data; | |
1407 | ||
1408 | spin_lock_irq(&usbhid->lock); | |
1409 | set_bit(HID_RESET_PENDING, &usbhid->iofl); | |
1410 | spin_unlock_irq(&usbhid->lock); | |
1411 | hid_cease_io(usbhid); | |
1412 | ||
1413 | return 0; | |
1414 | } | |
1415 | ||
1416 | /* Same routine used for post_reset and reset_resume */ | |
1417 | static int hid_post_reset(struct usb_interface *intf) | |
1418 | { | |
1419 | struct usb_device *dev = interface_to_usbdev (intf); | |
1420 | struct hid_device *hid = usb_get_intfdata(intf); | |
1421 | struct usbhid_device *usbhid = hid->driver_data; | |
dc3c78e4 | 1422 | struct usb_host_interface *interface = intf->cur_altsetting; |
ae2f0074 | 1423 | int status; |
dc3c78e4 SH |
1424 | char *rdesc; |
1425 | ||
1426 | /* Fetch and examine the HID report descriptor. If this | |
1427 | * has changed, then rebind. Since usbcore's check of the | |
1428 | * configuration descriptors passed, we already know that | |
1429 | * the size of the HID report descriptor has not changed. | |
1430 | */ | |
86e6b77e | 1431 | rdesc = kmalloc(hid->dev_rsize, GFP_KERNEL); |
dc3c78e4 SH |
1432 | if (!rdesc) { |
1433 | dbg_hid("couldn't allocate rdesc memory (post_reset)\n"); | |
1434 | return 1; | |
1435 | } | |
1436 | status = hid_get_class_descriptor(dev, | |
1437 | interface->desc.bInterfaceNumber, | |
86e6b77e | 1438 | HID_DT_REPORT, rdesc, hid->dev_rsize); |
dc3c78e4 SH |
1439 | if (status < 0) { |
1440 | dbg_hid("reading report descriptor failed (post_reset)\n"); | |
1441 | kfree(rdesc); | |
1442 | return 1; | |
1443 | } | |
86e6b77e | 1444 | status = memcmp(rdesc, hid->dev_rdesc, hid->dev_rsize); |
dc3c78e4 SH |
1445 | kfree(rdesc); |
1446 | if (status != 0) { | |
1447 | dbg_hid("report descriptor changed\n"); | |
1448 | return 1; | |
1449 | } | |
70fa9f2e | 1450 | |
ae2f0074 JK |
1451 | spin_lock_irq(&usbhid->lock); |
1452 | clear_bit(HID_RESET_PENDING, &usbhid->iofl); | |
1453 | spin_unlock_irq(&usbhid->lock); | |
1454 | hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0); | |
ae2f0074 JK |
1455 | status = hid_start_in(hid); |
1456 | if (status < 0) | |
1457 | hid_io_error(hid); | |
1458 | usbhid_restart_queues(usbhid); | |
1459 | ||
1460 | return 0; | |
1461 | } | |
1462 | ||
1463 | int usbhid_get_power(struct hid_device *hid) | |
1464 | { | |
1465 | struct usbhid_device *usbhid = hid->driver_data; | |
70fa9f2e | 1466 | |
ae2f0074 JK |
1467 | return usb_autopm_get_interface(usbhid->intf); |
1468 | } | |
1469 | ||
1470 | void usbhid_put_power(struct hid_device *hid) | |
1471 | { | |
1472 | struct usbhid_device *usbhid = hid->driver_data; | |
70fa9f2e | 1473 | |
ae2f0074 JK |
1474 | usb_autopm_put_interface(usbhid->intf); |
1475 | } | |
1476 | ||
1477 | ||
0f6f1407 | 1478 | #ifdef CONFIG_PM |
eb055fd0 AS |
1479 | static int hid_resume_common(struct hid_device *hid, bool driver_suspended) |
1480 | { | |
1481 | struct usbhid_device *usbhid = hid->driver_data; | |
1482 | int status; | |
1483 | ||
1484 | spin_lock_irq(&usbhid->lock); | |
1485 | clear_bit(HID_SUSPENDED, &usbhid->iofl); | |
1486 | usbhid_mark_busy(usbhid); | |
1487 | ||
1488 | if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) || | |
1489 | test_bit(HID_RESET_PENDING, &usbhid->iofl)) | |
1490 | schedule_work(&usbhid->reset_work); | |
1491 | usbhid->retry_delay = 0; | |
1492 | ||
1493 | usbhid_restart_queues(usbhid); | |
1494 | spin_unlock_irq(&usbhid->lock); | |
1495 | ||
1496 | status = hid_start_in(hid); | |
1497 | if (status < 0) | |
1498 | hid_io_error(hid); | |
1499 | ||
1500 | if (driver_suspended && hid->driver && hid->driver->resume) | |
1501 | status = hid->driver->resume(hid); | |
1502 | return status; | |
1503 | } | |
1504 | ||
27d72e85 | 1505 | static int hid_suspend(struct usb_interface *intf, pm_message_t message) |
1da177e4 | 1506 | { |
0361a28d | 1507 | struct hid_device *hid = usb_get_intfdata(intf); |
4916b3a5 | 1508 | struct usbhid_device *usbhid = hid->driver_data; |
0361a28d | 1509 | int status; |
eb055fd0 | 1510 | bool driver_suspended = false; |
1da177e4 | 1511 | |
5b1b0b81 | 1512 | if (PMSG_IS_AUTO(message)) { |
0361a28d ON |
1513 | spin_lock_irq(&usbhid->lock); /* Sync with error handler */ |
1514 | if (!test_bit(HID_RESET_PENDING, &usbhid->iofl) | |
1515 | && !test_bit(HID_CLEAR_HALT, &usbhid->iofl) | |
1516 | && !test_bit(HID_OUT_RUNNING, &usbhid->iofl) | |
1517 | && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl) | |
1518 | && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl) | |
1519 | && (!usbhid->ledcount || ignoreled)) | |
1520 | { | |
f2b5264d | 1521 | set_bit(HID_SUSPENDED, &usbhid->iofl); |
0361a28d | 1522 | spin_unlock_irq(&usbhid->lock); |
6a740aa4 BP |
1523 | if (hid->driver && hid->driver->suspend) { |
1524 | status = hid->driver->suspend(hid, message); | |
1525 | if (status < 0) | |
eb055fd0 | 1526 | goto failed; |
6a740aa4 | 1527 | } |
eb055fd0 | 1528 | driver_suspended = true; |
0361a28d ON |
1529 | } else { |
1530 | usbhid_mark_busy(usbhid); | |
1531 | spin_unlock_irq(&usbhid->lock); | |
1532 | return -EBUSY; | |
1533 | } | |
3d5afd32 | 1534 | |
0361a28d | 1535 | } else { |
6a740aa4 BP |
1536 | if (hid->driver && hid->driver->suspend) { |
1537 | status = hid->driver->suspend(hid, message); | |
1538 | if (status < 0) | |
1539 | return status; | |
1540 | } | |
eb055fd0 | 1541 | driver_suspended = true; |
0361a28d | 1542 | spin_lock_irq(&usbhid->lock); |
f2b5264d | 1543 | set_bit(HID_SUSPENDED, &usbhid->iofl); |
0361a28d | 1544 | spin_unlock_irq(&usbhid->lock); |
eb055fd0 AS |
1545 | if (usbhid_wait_io(hid) < 0) { |
1546 | status = -EIO; | |
1547 | goto failed; | |
1548 | } | |
0361a28d ON |
1549 | } |
1550 | ||
0361a28d ON |
1551 | hid_cancel_delayed_stuff(usbhid); |
1552 | hid_cease_io(usbhid); | |
1553 | ||
5b1b0b81 | 1554 | if (PMSG_IS_AUTO(message) && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) { |
0361a28d | 1555 | /* lost race against keypresses */ |
eb055fd0 AS |
1556 | status = -EBUSY; |
1557 | goto failed; | |
0361a28d | 1558 | } |
1da177e4 LT |
1559 | dev_dbg(&intf->dev, "suspend\n"); |
1560 | return 0; | |
eb055fd0 AS |
1561 | |
1562 | failed: | |
1563 | hid_resume_common(hid, driver_suspended); | |
1564 | return status; | |
1da177e4 LT |
1565 | } |
1566 | ||
1567 | static int hid_resume(struct usb_interface *intf) | |
1568 | { | |
1569 | struct hid_device *hid = usb_get_intfdata (intf); | |
4916b3a5 | 1570 | struct usbhid_device *usbhid = hid->driver_data; |
1da177e4 LT |
1571 | int status; |
1572 | ||
fde5be35 | 1573 | if (!test_bit(HID_STARTED, &usbhid->iofl)) |
3d5afd32 | 1574 | return 0; |
3d5afd32 | 1575 | |
eb055fd0 | 1576 | status = hid_resume_common(hid, true); |
1da177e4 | 1577 | dev_dbg(&intf->dev, "resume status %d\n", status); |
f07600cf | 1578 | return 0; |
df9a1f48 AS |
1579 | } |
1580 | ||
378a0ede | 1581 | static int hid_reset_resume(struct usb_interface *intf) |
df9a1f48 | 1582 | { |
378a0ede ON |
1583 | struct hid_device *hid = usb_get_intfdata(intf); |
1584 | struct usbhid_device *usbhid = hid->driver_data; | |
6a740aa4 | 1585 | int status; |
df9a1f48 | 1586 | |
f2b5264d | 1587 | clear_bit(HID_SUSPENDED, &usbhid->iofl); |
6a740aa4 BP |
1588 | status = hid_post_reset(intf); |
1589 | if (status >= 0 && hid->driver && hid->driver->reset_resume) { | |
1590 | int ret = hid->driver->reset_resume(hid); | |
1591 | if (ret < 0) | |
1592 | status = ret; | |
1593 | } | |
1594 | return status; | |
df9a1f48 AS |
1595 | } |
1596 | ||
ae2f0074 | 1597 | #endif /* CONFIG_PM */ |
df9a1f48 | 1598 | |
d67dec5b | 1599 | static const struct usb_device_id hid_usb_ids[] = { |
1da177e4 LT |
1600 | { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS, |
1601 | .bInterfaceClass = USB_INTERFACE_CLASS_HID }, | |
1602 | { } /* Terminating entry */ | |
1603 | }; | |
1604 | ||
1605 | MODULE_DEVICE_TABLE (usb, hid_usb_ids); | |
1606 | ||
1607 | static struct usb_driver hid_driver = { | |
1da177e4 | 1608 | .name = "usbhid", |
c4c259bc JK |
1609 | .probe = usbhid_probe, |
1610 | .disconnect = usbhid_disconnect, | |
0f6f1407 | 1611 | #ifdef CONFIG_PM |
1da177e4 LT |
1612 | .suspend = hid_suspend, |
1613 | .resume = hid_resume, | |
378a0ede | 1614 | .reset_resume = hid_reset_resume, |
0f6f1407 | 1615 | #endif |
df9a1f48 AS |
1616 | .pre_reset = hid_pre_reset, |
1617 | .post_reset = hid_post_reset, | |
1da177e4 | 1618 | .id_table = hid_usb_ids, |
933e3187 | 1619 | .supports_autosuspend = 1, |
1da177e4 LT |
1620 | }; |
1621 | ||
8fe294ca GC |
1622 | struct usb_interface *usbhid_find_interface(int minor) |
1623 | { | |
1624 | return usb_find_interface(&hid_driver, minor); | |
1625 | } | |
1626 | ||
1da177e4 LT |
1627 | static int __init hid_init(void) |
1628 | { | |
0361a28d ON |
1629 | int retval = -ENOMEM; |
1630 | ||
876b9276 PW |
1631 | retval = usbhid_quirks_init(quirks_param); |
1632 | if (retval) | |
1633 | goto usbhid_quirks_init_fail; | |
1da177e4 LT |
1634 | retval = usb_register(&hid_driver); |
1635 | if (retval) | |
1636 | goto usb_register_fail; | |
ccabcd2d | 1637 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
1da177e4 LT |
1638 | |
1639 | return 0; | |
1640 | usb_register_fail: | |
876b9276 PW |
1641 | usbhid_quirks_exit(); |
1642 | usbhid_quirks_init_fail: | |
1da177e4 LT |
1643 | return retval; |
1644 | } | |
1645 | ||
1646 | static void __exit hid_exit(void) | |
1647 | { | |
1648 | usb_deregister(&hid_driver); | |
876b9276 | 1649 | usbhid_quirks_exit(); |
1da177e4 LT |
1650 | } |
1651 | ||
1652 | module_init(hid_init); | |
1653 | module_exit(hid_exit); | |
1654 | ||
88adb72b JK |
1655 | MODULE_AUTHOR("Andreas Gal"); |
1656 | MODULE_AUTHOR("Vojtech Pavlik"); | |
1657 | MODULE_AUTHOR("Jiri Kosina"); | |
1da177e4 LT |
1658 | MODULE_DESCRIPTION(DRIVER_DESC); |
1659 | MODULE_LICENSE(DRIVER_LICENSE); |