Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2001 Paul Stewart | |
3 | * Copyright (c) 2001 Vojtech Pavlik | |
4 | * | |
5 | * HID char devices, giving access to raw HID device events. | |
6 | * | |
7 | */ | |
8 | ||
9 | /* | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
23 | * | |
24 | * Should you need to contact me, the author, you can do so either by | |
25 | * e-mail - mail your message to Paul Stewart <stewart@wetlogic.net> | |
26 | */ | |
27 | ||
1da177e4 LT |
28 | #include <linux/poll.h> |
29 | #include <linux/slab.h> | |
30 | #include <linux/module.h> | |
31 | #include <linux/init.h> | |
32 | #include <linux/smp_lock.h> | |
33 | #include <linux/input.h> | |
34 | #include <linux/usb.h> | |
dde5845a | 35 | #include <linux/hid.h> |
1da177e4 | 36 | #include <linux/hiddev.h> |
bb6c8d8f | 37 | #include <linux/compat.h> |
dde5845a | 38 | #include "usbhid.h" |
1da177e4 LT |
39 | |
40 | #ifdef CONFIG_USB_DYNAMIC_MINORS | |
41 | #define HIDDEV_MINOR_BASE 0 | |
42 | #define HIDDEV_MINORS 256 | |
43 | #else | |
44 | #define HIDDEV_MINOR_BASE 96 | |
45 | #define HIDDEV_MINORS 16 | |
46 | #endif | |
47 | #define HIDDEV_BUFFER_SIZE 64 | |
48 | ||
49 | struct hiddev { | |
50 | int exist; | |
51 | int open; | |
52 | wait_queue_head_t wait; | |
53 | struct hid_device *hid; | |
826d5982 | 54 | struct list_head list; |
cdcb44e8 | 55 | spinlock_t list_lock; |
1da177e4 LT |
56 | }; |
57 | ||
58 | struct hiddev_list { | |
59 | struct hiddev_usage_ref buffer[HIDDEV_BUFFER_SIZE]; | |
60 | int head; | |
61 | int tail; | |
62 | unsigned flags; | |
63 | struct fasync_struct *fasync; | |
64 | struct hiddev *hiddev; | |
826d5982 | 65 | struct list_head node; |
1da177e4 LT |
66 | }; |
67 | ||
68 | static struct hiddev *hiddev_table[HIDDEV_MINORS]; | |
69 | ||
70 | /* | |
71 | * Find a report, given the report's type and ID. The ID can be specified | |
72 | * indirectly by REPORT_ID_FIRST (which returns the first report of the given | |
73 | * type) or by (REPORT_ID_NEXT | old_id), which returns the next report of the | |
74 | * given type which follows old_id. | |
75 | */ | |
76 | static struct hid_report * | |
77 | hiddev_lookup_report(struct hid_device *hid, struct hiddev_report_info *rinfo) | |
78 | { | |
826d5982 DT |
79 | unsigned int flags = rinfo->report_id & ~HID_REPORT_ID_MASK; |
80 | unsigned int rid = rinfo->report_id & HID_REPORT_ID_MASK; | |
1da177e4 | 81 | struct hid_report_enum *report_enum; |
826d5982 | 82 | struct hid_report *report; |
1da177e4 LT |
83 | struct list_head *list; |
84 | ||
85 | if (rinfo->report_type < HID_REPORT_TYPE_MIN || | |
826d5982 DT |
86 | rinfo->report_type > HID_REPORT_TYPE_MAX) |
87 | return NULL; | |
1da177e4 LT |
88 | |
89 | report_enum = hid->report_enum + | |
90 | (rinfo->report_type - HID_REPORT_TYPE_MIN); | |
91 | ||
92 | switch (flags) { | |
93 | case 0: /* Nothing to do -- report_id is already set correctly */ | |
94 | break; | |
95 | ||
96 | case HID_REPORT_ID_FIRST: | |
826d5982 | 97 | if (list_empty(&report_enum->report_list)) |
1da177e4 | 98 | return NULL; |
826d5982 DT |
99 | |
100 | list = report_enum->report_list.next; | |
101 | report = list_entry(list, struct hid_report, list); | |
102 | rinfo->report_id = report->id; | |
1da177e4 | 103 | break; |
05f091ab | 104 | |
1da177e4 | 105 | case HID_REPORT_ID_NEXT: |
826d5982 DT |
106 | report = report_enum->report_id_hash[rid]; |
107 | if (!report) | |
1da177e4 | 108 | return NULL; |
826d5982 DT |
109 | |
110 | list = report->list.next; | |
1da177e4 LT |
111 | if (list == &report_enum->report_list) |
112 | return NULL; | |
826d5982 DT |
113 | |
114 | report = list_entry(list, struct hid_report, list); | |
115 | rinfo->report_id = report->id; | |
1da177e4 | 116 | break; |
05f091ab | 117 | |
1da177e4 LT |
118 | default: |
119 | return NULL; | |
120 | } | |
121 | ||
122 | return report_enum->report_id_hash[rinfo->report_id]; | |
123 | } | |
124 | ||
125 | /* | |
126 | * Perform an exhaustive search of the report table for a usage, given its | |
127 | * type and usage id. | |
128 | */ | |
129 | static struct hid_field * | |
130 | hiddev_lookup_usage(struct hid_device *hid, struct hiddev_usage_ref *uref) | |
131 | { | |
132 | int i, j; | |
133 | struct hid_report *report; | |
134 | struct hid_report_enum *report_enum; | |
135 | struct hid_field *field; | |
136 | ||
137 | if (uref->report_type < HID_REPORT_TYPE_MIN || | |
826d5982 DT |
138 | uref->report_type > HID_REPORT_TYPE_MAX) |
139 | return NULL; | |
1da177e4 LT |
140 | |
141 | report_enum = hid->report_enum + | |
142 | (uref->report_type - HID_REPORT_TYPE_MIN); | |
143 | ||
826d5982 | 144 | list_for_each_entry(report, &report_enum->report_list, list) { |
1da177e4 LT |
145 | for (i = 0; i < report->maxfield; i++) { |
146 | field = report->field[i]; | |
147 | for (j = 0; j < field->maxusage; j++) { | |
148 | if (field->usage[j].hid == uref->usage_code) { | |
149 | uref->report_id = report->id; | |
150 | uref->field_index = i; | |
151 | uref->usage_index = j; | |
152 | return field; | |
153 | } | |
154 | } | |
155 | } | |
826d5982 | 156 | } |
1da177e4 LT |
157 | |
158 | return NULL; | |
159 | } | |
160 | ||
161 | static void hiddev_send_event(struct hid_device *hid, | |
162 | struct hiddev_usage_ref *uref) | |
163 | { | |
164 | struct hiddev *hiddev = hid->hiddev; | |
826d5982 | 165 | struct hiddev_list *list; |
cdcb44e8 | 166 | unsigned long flags; |
1da177e4 | 167 | |
cdcb44e8 | 168 | spin_lock_irqsave(&hiddev->list_lock, flags); |
826d5982 | 169 | list_for_each_entry(list, &hiddev->list, node) { |
1da177e4 LT |
170 | if (uref->field_index != HID_FIELD_INDEX_NONE || |
171 | (list->flags & HIDDEV_FLAG_REPORT) != 0) { | |
172 | list->buffer[list->head] = *uref; | |
05f091ab | 173 | list->head = (list->head + 1) & |
1da177e4 LT |
174 | (HIDDEV_BUFFER_SIZE - 1); |
175 | kill_fasync(&list->fasync, SIGIO, POLL_IN); | |
176 | } | |
1da177e4 | 177 | } |
cdcb44e8 | 178 | spin_unlock_irqrestore(&hiddev->list_lock, flags); |
1da177e4 LT |
179 | |
180 | wake_up_interruptible(&hiddev->wait); | |
181 | } | |
182 | ||
183 | /* | |
184 | * This is where hid.c calls into hiddev to pass an event that occurred over | |
185 | * the interrupt pipe | |
186 | */ | |
187 | void hiddev_hid_event(struct hid_device *hid, struct hid_field *field, | |
7d12e780 | 188 | struct hid_usage *usage, __s32 value) |
1da177e4 LT |
189 | { |
190 | unsigned type = field->report_type; | |
191 | struct hiddev_usage_ref uref; | |
192 | ||
05f091ab | 193 | uref.report_type = |
1da177e4 | 194 | (type == HID_INPUT_REPORT) ? HID_REPORT_TYPE_INPUT : |
05f091ab | 195 | ((type == HID_OUTPUT_REPORT) ? HID_REPORT_TYPE_OUTPUT : |
826d5982 | 196 | ((type == HID_FEATURE_REPORT) ? HID_REPORT_TYPE_FEATURE : 0)); |
1da177e4 LT |
197 | uref.report_id = field->report->id; |
198 | uref.field_index = field->index; | |
199 | uref.usage_index = (usage - field->usage); | |
200 | uref.usage_code = usage->hid; | |
201 | uref.value = value; | |
202 | ||
203 | hiddev_send_event(hid, &uref); | |
204 | } | |
229695e5 | 205 | EXPORT_SYMBOL_GPL(hiddev_hid_event); |
1da177e4 LT |
206 | |
207 | void hiddev_report_event(struct hid_device *hid, struct hid_report *report) | |
208 | { | |
209 | unsigned type = report->type; | |
210 | struct hiddev_usage_ref uref; | |
211 | ||
212 | memset(&uref, 0, sizeof(uref)); | |
05f091ab | 213 | uref.report_type = |
1da177e4 | 214 | (type == HID_INPUT_REPORT) ? HID_REPORT_TYPE_INPUT : |
05f091ab | 215 | ((type == HID_OUTPUT_REPORT) ? HID_REPORT_TYPE_OUTPUT : |
826d5982 | 216 | ((type == HID_FEATURE_REPORT) ? HID_REPORT_TYPE_FEATURE : 0)); |
1da177e4 LT |
217 | uref.report_id = report->id; |
218 | uref.field_index = HID_FIELD_INDEX_NONE; | |
219 | ||
220 | hiddev_send_event(hid, &uref); | |
221 | } | |
aa8de2f0 | 222 | |
1da177e4 LT |
223 | /* |
224 | * fasync file op | |
225 | */ | |
226 | static int hiddev_fasync(int fd, struct file *file, int on) | |
227 | { | |
228 | int retval; | |
229 | struct hiddev_list *list = file->private_data; | |
826d5982 | 230 | |
1da177e4 | 231 | retval = fasync_helper(fd, file, on, &list->fasync); |
826d5982 | 232 | |
1da177e4 LT |
233 | return retval < 0 ? retval : 0; |
234 | } | |
235 | ||
236 | ||
237 | /* | |
238 | * release file op | |
239 | */ | |
240 | static int hiddev_release(struct inode * inode, struct file * file) | |
241 | { | |
242 | struct hiddev_list *list = file->private_data; | |
cdcb44e8 | 243 | unsigned long flags; |
1da177e4 | 244 | |
cdcb44e8 | 245 | spin_lock_irqsave(&list->hiddev->list_lock, flags); |
826d5982 | 246 | list_del(&list->node); |
cdcb44e8 | 247 | spin_unlock_irqrestore(&list->hiddev->list_lock, flags); |
1da177e4 LT |
248 | |
249 | if (!--list->hiddev->open) { | |
05f091ab | 250 | if (list->hiddev->exist) |
4916b3a5 | 251 | usbhid_close(list->hiddev->hid); |
1da177e4 LT |
252 | else |
253 | kfree(list->hiddev); | |
254 | } | |
255 | ||
256 | kfree(list); | |
257 | ||
258 | return 0; | |
259 | } | |
260 | ||
261 | /* | |
262 | * open file op | |
263 | */ | |
826d5982 DT |
264 | static int hiddev_open(struct inode *inode, struct file *file) |
265 | { | |
1da177e4 | 266 | struct hiddev_list *list; |
cdcb44e8 | 267 | unsigned long flags; |
1da177e4 LT |
268 | |
269 | int i = iminor(inode) - HIDDEV_MINOR_BASE; | |
270 | ||
271 | if (i >= HIDDEV_MINORS || !hiddev_table[i]) | |
272 | return -ENODEV; | |
273 | ||
bbdb7daf | 274 | if (!(list = kzalloc(sizeof(struct hiddev_list), GFP_KERNEL))) |
1da177e4 | 275 | return -ENOMEM; |
1da177e4 LT |
276 | |
277 | list->hiddev = hiddev_table[i]; | |
cdcb44e8 JK |
278 | |
279 | spin_lock_irqsave(&list->hiddev->list_lock, flags); | |
826d5982 | 280 | list_add_tail(&list->node, &hiddev_table[i]->list); |
cdcb44e8 JK |
281 | spin_unlock_irqrestore(&list->hiddev->list_lock, flags); |
282 | ||
1da177e4 LT |
283 | file->private_data = list; |
284 | ||
285 | if (!list->hiddev->open++) | |
286 | if (list->hiddev->exist) | |
4916b3a5 | 287 | usbhid_open(hiddev_table[i]->hid); |
1da177e4 LT |
288 | |
289 | return 0; | |
290 | } | |
291 | ||
292 | /* | |
293 | * "write" file op | |
294 | */ | |
295 | static ssize_t hiddev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos) | |
296 | { | |
297 | return -EINVAL; | |
298 | } | |
299 | ||
300 | /* | |
301 | * "read" file op | |
302 | */ | |
303 | static ssize_t hiddev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos) | |
304 | { | |
305 | DECLARE_WAITQUEUE(wait, current); | |
306 | struct hiddev_list *list = file->private_data; | |
307 | int event_size; | |
308 | int retval = 0; | |
309 | ||
310 | event_size = ((list->flags & HIDDEV_FLAG_UREF) != 0) ? | |
311 | sizeof(struct hiddev_usage_ref) : sizeof(struct hiddev_event); | |
312 | ||
313 | if (count < event_size) | |
314 | return 0; | |
315 | ||
316 | while (retval == 0) { | |
317 | if (list->head == list->tail) { | |
318 | add_wait_queue(&list->hiddev->wait, &wait); | |
319 | set_current_state(TASK_INTERRUPTIBLE); | |
05f091ab | 320 | |
1da177e4 LT |
321 | while (list->head == list->tail) { |
322 | if (file->f_flags & O_NONBLOCK) { | |
323 | retval = -EAGAIN; | |
324 | break; | |
325 | } | |
326 | if (signal_pending(current)) { | |
327 | retval = -ERESTARTSYS; | |
328 | break; | |
329 | } | |
330 | if (!list->hiddev->exist) { | |
331 | retval = -EIO; | |
332 | break; | |
333 | } | |
05f091ab | 334 | |
1da177e4 | 335 | schedule(); |
48d70552 | 336 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 LT |
337 | } |
338 | ||
339 | set_current_state(TASK_RUNNING); | |
340 | remove_wait_queue(&list->hiddev->wait, &wait); | |
341 | } | |
342 | ||
343 | if (retval) | |
344 | return retval; | |
345 | ||
346 | ||
05f091ab | 347 | while (list->head != list->tail && |
1da177e4 LT |
348 | retval + event_size <= count) { |
349 | if ((list->flags & HIDDEV_FLAG_UREF) == 0) { | |
350 | if (list->buffer[list->tail].field_index != | |
351 | HID_FIELD_INDEX_NONE) { | |
352 | struct hiddev_event event; | |
353 | event.hid = list->buffer[list->tail].usage_code; | |
354 | event.value = list->buffer[list->tail].value; | |
355 | if (copy_to_user(buffer + retval, &event, sizeof(struct hiddev_event))) | |
356 | return -EFAULT; | |
357 | retval += sizeof(struct hiddev_event); | |
358 | } | |
359 | } else { | |
360 | if (list->buffer[list->tail].field_index != HID_FIELD_INDEX_NONE || | |
361 | (list->flags & HIDDEV_FLAG_REPORT) != 0) { | |
362 | if (copy_to_user(buffer + retval, list->buffer + list->tail, sizeof(struct hiddev_usage_ref))) | |
363 | return -EFAULT; | |
364 | retval += sizeof(struct hiddev_usage_ref); | |
365 | } | |
366 | } | |
367 | list->tail = (list->tail + 1) & (HIDDEV_BUFFER_SIZE - 1); | |
368 | } | |
369 | ||
370 | } | |
371 | ||
372 | return retval; | |
373 | } | |
374 | ||
375 | /* | |
376 | * "poll" file op | |
377 | * No kernel lock - fine | |
378 | */ | |
379 | static unsigned int hiddev_poll(struct file *file, poll_table *wait) | |
380 | { | |
381 | struct hiddev_list *list = file->private_data; | |
826d5982 | 382 | |
1da177e4 LT |
383 | poll_wait(file, &list->hiddev->wait, wait); |
384 | if (list->head != list->tail) | |
385 | return POLLIN | POLLRDNORM; | |
386 | if (!list->hiddev->exist) | |
387 | return POLLERR | POLLHUP; | |
388 | return 0; | |
389 | } | |
390 | ||
391 | /* | |
392 | * "ioctl" file op | |
393 | */ | |
cf2a299e JD |
394 | static noinline int hiddev_ioctl_usage(struct hiddev *hiddev, unsigned int cmd, void __user *user_arg) |
395 | { | |
396 | struct hid_device *hid = hiddev->hid; | |
397 | struct hiddev_report_info rinfo; | |
398 | struct hiddev_usage_ref_multi *uref_multi = NULL; | |
399 | struct hiddev_usage_ref *uref; | |
400 | struct hid_report *report; | |
401 | struct hid_field *field; | |
402 | int i; | |
403 | ||
404 | uref_multi = kmalloc(sizeof(struct hiddev_usage_ref_multi), GFP_KERNEL); | |
405 | if (!uref_multi) | |
406 | return -ENOMEM; | |
7961df16 | 407 | lock_kernel(); |
cf2a299e JD |
408 | uref = &uref_multi->uref; |
409 | if (cmd == HIDIOCGUSAGES || cmd == HIDIOCSUSAGES) { | |
410 | if (copy_from_user(uref_multi, user_arg, | |
411 | sizeof(*uref_multi))) | |
412 | goto fault; | |
413 | } else { | |
414 | if (copy_from_user(uref, user_arg, sizeof(*uref))) | |
415 | goto fault; | |
416 | } | |
417 | ||
418 | switch (cmd) { | |
419 | case HIDIOCGUCODE: | |
420 | rinfo.report_type = uref->report_type; | |
421 | rinfo.report_id = uref->report_id; | |
422 | if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL) | |
423 | goto inval; | |
424 | ||
425 | if (uref->field_index >= report->maxfield) | |
426 | goto inval; | |
427 | ||
428 | field = report->field[uref->field_index]; | |
429 | if (uref->usage_index >= field->maxusage) | |
430 | goto inval; | |
431 | ||
432 | uref->usage_code = field->usage[uref->usage_index].hid; | |
433 | ||
434 | if (copy_to_user(user_arg, uref, sizeof(*uref))) | |
435 | goto fault; | |
436 | ||
eb991089 | 437 | goto goodreturn; |
cf2a299e JD |
438 | |
439 | default: | |
440 | if (cmd != HIDIOCGUSAGE && | |
441 | cmd != HIDIOCGUSAGES && | |
442 | uref->report_type == HID_REPORT_TYPE_INPUT) | |
443 | goto inval; | |
444 | ||
445 | if (uref->report_id == HID_REPORT_ID_UNKNOWN) { | |
446 | field = hiddev_lookup_usage(hid, uref); | |
447 | if (field == NULL) | |
448 | goto inval; | |
449 | } else { | |
450 | rinfo.report_type = uref->report_type; | |
451 | rinfo.report_id = uref->report_id; | |
452 | if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL) | |
453 | goto inval; | |
454 | ||
455 | if (uref->field_index >= report->maxfield) | |
456 | goto inval; | |
457 | ||
458 | field = report->field[uref->field_index]; | |
459 | ||
460 | if (cmd == HIDIOCGCOLLECTIONINDEX) { | |
461 | if (uref->usage_index >= field->maxusage) | |
462 | goto inval; | |
463 | } else if (uref->usage_index >= field->report_count) | |
464 | goto inval; | |
465 | ||
466 | else if ((cmd == HIDIOCGUSAGES || cmd == HIDIOCSUSAGES) && | |
467 | (uref_multi->num_values > HID_MAX_MULTI_USAGES || | |
468 | uref->usage_index + uref_multi->num_values > field->report_count)) | |
469 | goto inval; | |
470 | } | |
471 | ||
472 | switch (cmd) { | |
473 | case HIDIOCGUSAGE: | |
474 | uref->value = field->value[uref->usage_index]; | |
475 | if (copy_to_user(user_arg, uref, sizeof(*uref))) | |
476 | goto fault; | |
477 | goto goodreturn; | |
478 | ||
479 | case HIDIOCSUSAGE: | |
480 | field->value[uref->usage_index] = uref->value; | |
481 | goto goodreturn; | |
482 | ||
483 | case HIDIOCGCOLLECTIONINDEX: | |
484 | kfree(uref_multi); | |
485 | return field->usage[uref->usage_index].collection_index; | |
486 | case HIDIOCGUSAGES: | |
487 | for (i = 0; i < uref_multi->num_values; i++) | |
488 | uref_multi->values[i] = | |
489 | field->value[uref->usage_index + i]; | |
490 | if (copy_to_user(user_arg, uref_multi, | |
491 | sizeof(*uref_multi))) | |
492 | goto fault; | |
493 | goto goodreturn; | |
494 | case HIDIOCSUSAGES: | |
495 | for (i = 0; i < uref_multi->num_values; i++) | |
496 | field->value[uref->usage_index + i] = | |
497 | uref_multi->values[i]; | |
498 | goto goodreturn; | |
499 | } | |
500 | ||
501 | goodreturn: | |
7961df16 | 502 | unlock_kernel(); |
cf2a299e JD |
503 | kfree(uref_multi); |
504 | return 0; | |
505 | fault: | |
7961df16 | 506 | unlock_kernel(); |
cf2a299e JD |
507 | kfree(uref_multi); |
508 | return -EFAULT; | |
509 | inval: | |
7961df16 | 510 | unlock_kernel(); |
cf2a299e JD |
511 | kfree(uref_multi); |
512 | return -EINVAL; | |
513 | } | |
514 | } | |
515 | ||
516 | static noinline int hiddev_ioctl_string(struct hiddev *hiddev, unsigned int cmd, void __user *user_arg) | |
517 | { | |
518 | struct hid_device *hid = hiddev->hid; | |
519 | struct usb_device *dev = hid_to_usb_dev(hid); | |
520 | int idx, len; | |
521 | char *buf; | |
522 | ||
523 | if (get_user(idx, (int __user *)user_arg)) | |
524 | return -EFAULT; | |
525 | ||
526 | if ((buf = kmalloc(HID_STRING_SIZE, GFP_KERNEL)) == NULL) | |
527 | return -ENOMEM; | |
528 | ||
529 | if ((len = usb_string(dev, idx, buf, HID_STRING_SIZE-1)) < 0) { | |
530 | kfree(buf); | |
531 | return -EINVAL; | |
532 | } | |
533 | ||
534 | if (copy_to_user(user_arg+sizeof(int), buf, len+1)) { | |
535 | kfree(buf); | |
536 | return -EFAULT; | |
537 | } | |
538 | ||
539 | kfree(buf); | |
540 | ||
541 | return len; | |
542 | } | |
543 | ||
7961df16 | 544 | static long hiddev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
545 | { |
546 | struct hiddev_list *list = file->private_data; | |
547 | struct hiddev *hiddev = list->hiddev; | |
548 | struct hid_device *hid = hiddev->hid; | |
be820975 | 549 | struct usb_device *dev = hid_to_usb_dev(hid); |
1da177e4 LT |
550 | struct hiddev_collection_info cinfo; |
551 | struct hiddev_report_info rinfo; | |
552 | struct hiddev_field_info finfo; | |
1da177e4 LT |
553 | struct hiddev_devinfo dinfo; |
554 | struct hid_report *report; | |
555 | struct hid_field *field; | |
4916b3a5 | 556 | struct usbhid_device *usbhid = hid->driver_data; |
1da177e4 LT |
557 | void __user *user_arg = (void __user *)arg; |
558 | int i; | |
7961df16 AC |
559 | |
560 | /* Called without BKL by compat methods so no BKL taken */ | |
1da177e4 | 561 | |
7961df16 | 562 | /* FIXME: Who or what stop this racing with a disconnect ?? */ |
1da177e4 LT |
563 | if (!hiddev->exist) |
564 | return -EIO; | |
565 | ||
566 | switch (cmd) { | |
567 | ||
568 | case HIDIOCGVERSION: | |
569 | return put_user(HID_VERSION, (int __user *)arg); | |
570 | ||
571 | case HIDIOCAPPLICATION: | |
572 | if (arg < 0 || arg >= hid->maxapplication) | |
573 | return -EINVAL; | |
574 | ||
575 | for (i = 0; i < hid->maxcollection; i++) | |
05f091ab | 576 | if (hid->collection[i].type == |
1da177e4 LT |
577 | HID_COLLECTION_APPLICATION && arg-- == 0) |
578 | break; | |
05f091ab | 579 | |
1da177e4 LT |
580 | if (i == hid->maxcollection) |
581 | return -EINVAL; | |
582 | ||
583 | return hid->collection[i].usage; | |
584 | ||
585 | case HIDIOCGDEVINFO: | |
586 | dinfo.bustype = BUS_USB; | |
587 | dinfo.busnum = dev->bus->busnum; | |
588 | dinfo.devnum = dev->devnum; | |
4916b3a5 | 589 | dinfo.ifnum = usbhid->ifnum; |
1da177e4 LT |
590 | dinfo.vendor = le16_to_cpu(dev->descriptor.idVendor); |
591 | dinfo.product = le16_to_cpu(dev->descriptor.idProduct); | |
592 | dinfo.version = le16_to_cpu(dev->descriptor.bcdDevice); | |
593 | dinfo.num_applications = hid->maxapplication; | |
594 | if (copy_to_user(user_arg, &dinfo, sizeof(dinfo))) | |
595 | return -EFAULT; | |
596 | ||
597 | return 0; | |
598 | ||
599 | case HIDIOCGFLAG: | |
600 | if (put_user(list->flags, (int __user *)arg)) | |
601 | return -EFAULT; | |
602 | ||
603 | return 0; | |
604 | ||
605 | case HIDIOCSFLAG: | |
606 | { | |
607 | int newflags; | |
608 | if (get_user(newflags, (int __user *)arg)) | |
609 | return -EFAULT; | |
610 | ||
611 | if ((newflags & ~HIDDEV_FLAGS) != 0 || | |
612 | ((newflags & HIDDEV_FLAG_REPORT) != 0 && | |
613 | (newflags & HIDDEV_FLAG_UREF) == 0)) | |
614 | return -EINVAL; | |
615 | ||
616 | list->flags = newflags; | |
617 | ||
618 | return 0; | |
619 | } | |
620 | ||
621 | case HIDIOCGSTRING: | |
cf2a299e | 622 | return hiddev_ioctl_string(hiddev, cmd, user_arg); |
1da177e4 LT |
623 | |
624 | case HIDIOCINITREPORT: | |
4916b3a5 | 625 | usbhid_init_reports(hid); |
1da177e4 LT |
626 | |
627 | return 0; | |
628 | ||
629 | case HIDIOCGREPORT: | |
630 | if (copy_from_user(&rinfo, user_arg, sizeof(rinfo))) | |
631 | return -EFAULT; | |
632 | ||
633 | if (rinfo.report_type == HID_REPORT_TYPE_OUTPUT) | |
634 | return -EINVAL; | |
635 | ||
636 | if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL) | |
637 | return -EINVAL; | |
638 | ||
4916b3a5 JK |
639 | usbhid_submit_report(hid, report, USB_DIR_IN); |
640 | usbhid_wait_io(hid); | |
1da177e4 LT |
641 | |
642 | return 0; | |
643 | ||
644 | case HIDIOCSREPORT: | |
645 | if (copy_from_user(&rinfo, user_arg, sizeof(rinfo))) | |
646 | return -EFAULT; | |
647 | ||
648 | if (rinfo.report_type == HID_REPORT_TYPE_INPUT) | |
649 | return -EINVAL; | |
650 | ||
651 | if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL) | |
652 | return -EINVAL; | |
653 | ||
4916b3a5 JK |
654 | usbhid_submit_report(hid, report, USB_DIR_OUT); |
655 | usbhid_wait_io(hid); | |
1da177e4 LT |
656 | |
657 | return 0; | |
658 | ||
659 | case HIDIOCGREPORTINFO: | |
660 | if (copy_from_user(&rinfo, user_arg, sizeof(rinfo))) | |
661 | return -EFAULT; | |
662 | ||
663 | if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL) | |
664 | return -EINVAL; | |
665 | ||
666 | rinfo.num_fields = report->maxfield; | |
667 | ||
668 | if (copy_to_user(user_arg, &rinfo, sizeof(rinfo))) | |
669 | return -EFAULT; | |
670 | ||
671 | return 0; | |
672 | ||
673 | case HIDIOCGFIELDINFO: | |
674 | if (copy_from_user(&finfo, user_arg, sizeof(finfo))) | |
675 | return -EFAULT; | |
676 | rinfo.report_type = finfo.report_type; | |
677 | rinfo.report_id = finfo.report_id; | |
678 | if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL) | |
679 | return -EINVAL; | |
680 | ||
681 | if (finfo.field_index >= report->maxfield) | |
682 | return -EINVAL; | |
683 | ||
684 | field = report->field[finfo.field_index]; | |
685 | memset(&finfo, 0, sizeof(finfo)); | |
686 | finfo.report_type = rinfo.report_type; | |
687 | finfo.report_id = rinfo.report_id; | |
688 | finfo.field_index = field->report_count - 1; | |
689 | finfo.maxusage = field->maxusage; | |
690 | finfo.flags = field->flags; | |
691 | finfo.physical = field->physical; | |
692 | finfo.logical = field->logical; | |
693 | finfo.application = field->application; | |
694 | finfo.logical_minimum = field->logical_minimum; | |
695 | finfo.logical_maximum = field->logical_maximum; | |
696 | finfo.physical_minimum = field->physical_minimum; | |
697 | finfo.physical_maximum = field->physical_maximum; | |
698 | finfo.unit_exponent = field->unit_exponent; | |
699 | finfo.unit = field->unit; | |
700 | ||
701 | if (copy_to_user(user_arg, &finfo, sizeof(finfo))) | |
702 | return -EFAULT; | |
703 | ||
704 | return 0; | |
705 | ||
706 | case HIDIOCGUCODE: | |
cf2a299e | 707 | /* fall through */ |
1da177e4 LT |
708 | case HIDIOCGUSAGE: |
709 | case HIDIOCSUSAGE: | |
710 | case HIDIOCGUSAGES: | |
711 | case HIDIOCSUSAGES: | |
712 | case HIDIOCGCOLLECTIONINDEX: | |
cf2a299e | 713 | return hiddev_ioctl_usage(hiddev, cmd, user_arg); |
1da177e4 LT |
714 | |
715 | case HIDIOCGCOLLECTIONINFO: | |
716 | if (copy_from_user(&cinfo, user_arg, sizeof(cinfo))) | |
717 | return -EFAULT; | |
718 | ||
719 | if (cinfo.index >= hid->maxcollection) | |
720 | return -EINVAL; | |
721 | ||
722 | cinfo.type = hid->collection[cinfo.index].type; | |
723 | cinfo.usage = hid->collection[cinfo.index].usage; | |
724 | cinfo.level = hid->collection[cinfo.index].level; | |
725 | ||
726 | if (copy_to_user(user_arg, &cinfo, sizeof(cinfo))) | |
727 | return -EFAULT; | |
728 | return 0; | |
729 | ||
730 | default: | |
731 | ||
732 | if (_IOC_TYPE(cmd) != 'H' || _IOC_DIR(cmd) != _IOC_READ) | |
733 | return -EINVAL; | |
734 | ||
735 | if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGNAME(0))) { | |
736 | int len; | |
737 | if (!hid->name) | |
738 | return 0; | |
739 | len = strlen(hid->name) + 1; | |
740 | if (len > _IOC_SIZE(cmd)) | |
741 | len = _IOC_SIZE(cmd); | |
742 | return copy_to_user(user_arg, hid->name, len) ? | |
743 | -EFAULT : len; | |
744 | } | |
745 | ||
746 | if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGPHYS(0))) { | |
747 | int len; | |
748 | if (!hid->phys) | |
749 | return 0; | |
750 | len = strlen(hid->phys) + 1; | |
751 | if (len > _IOC_SIZE(cmd)) | |
752 | len = _IOC_SIZE(cmd); | |
753 | return copy_to_user(user_arg, hid->phys, len) ? | |
754 | -EFAULT : len; | |
755 | } | |
756 | } | |
757 | return -EINVAL; | |
758 | } | |
759 | ||
bb6c8d8f PL |
760 | #ifdef CONFIG_COMPAT |
761 | static long hiddev_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
762 | { | |
88af45ba | 763 | return hiddev_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); |
bb6c8d8f PL |
764 | } |
765 | #endif | |
766 | ||
066202dd | 767 | static const struct file_operations hiddev_fops = { |
1da177e4 LT |
768 | .owner = THIS_MODULE, |
769 | .read = hiddev_read, | |
770 | .write = hiddev_write, | |
771 | .poll = hiddev_poll, | |
772 | .open = hiddev_open, | |
773 | .release = hiddev_release, | |
7961df16 | 774 | .unlocked_ioctl = hiddev_ioctl, |
1da177e4 | 775 | .fasync = hiddev_fasync, |
bb6c8d8f PL |
776 | #ifdef CONFIG_COMPAT |
777 | .compat_ioctl = hiddev_compat_ioctl, | |
778 | #endif | |
1da177e4 LT |
779 | }; |
780 | ||
781 | static struct usb_class_driver hiddev_class = { | |
d6e5bcf4 | 782 | .name = "hiddev%d", |
1da177e4 | 783 | .fops = &hiddev_fops, |
05f091ab | 784 | .minor_base = HIDDEV_MINOR_BASE, |
1da177e4 LT |
785 | }; |
786 | ||
787 | /* | |
788 | * This is where hid.c calls us to connect a hid device to the hiddev driver | |
789 | */ | |
93c10132 | 790 | int hiddev_connect(struct hid_device *hid, unsigned int force) |
1da177e4 LT |
791 | { |
792 | struct hiddev *hiddev; | |
4916b3a5 | 793 | struct usbhid_device *usbhid = hid->driver_data; |
1da177e4 LT |
794 | int retval; |
795 | ||
93c10132 JS |
796 | if (!force) { |
797 | unsigned int i; | |
798 | for (i = 0; i < hid->maxcollection; i++) | |
799 | if (hid->collection[i].type == | |
800 | HID_COLLECTION_APPLICATION && | |
801 | !IS_INPUT_APPLICATION(hid->collection[i].usage)) | |
802 | break; | |
1da177e4 | 803 | |
93c10132 JS |
804 | if (i == hid->maxcollection) |
805 | return -1; | |
806 | } | |
1da177e4 | 807 | |
bbdb7daf | 808 | if (!(hiddev = kzalloc(sizeof(struct hiddev), GFP_KERNEL))) |
1da177e4 | 809 | return -1; |
1da177e4 | 810 | |
4916b3a5 | 811 | retval = usb_register_dev(usbhid->intf, &hiddev_class); |
1da177e4 | 812 | if (retval) { |
58037eb9 | 813 | err_hid("Not able to get a minor for this device."); |
1da177e4 LT |
814 | kfree(hiddev); |
815 | return -1; | |
816 | } | |
817 | ||
818 | init_waitqueue_head(&hiddev->wait); | |
826d5982 | 819 | INIT_LIST_HEAD(&hiddev->list); |
cdcb44e8 | 820 | spin_lock_init(&hiddev->list_lock); |
1da177e4 LT |
821 | hiddev->hid = hid; |
822 | hiddev->exist = 1; | |
823 | ||
4916b3a5 | 824 | hid->minor = usbhid->intf->minor; |
1da177e4 LT |
825 | hid->hiddev = hiddev; |
826 | ||
4916b3a5 | 827 | hiddev_table[usbhid->intf->minor - HIDDEV_MINOR_BASE] = hiddev; |
826d5982 | 828 | |
1da177e4 LT |
829 | return 0; |
830 | } | |
831 | ||
832 | /* | |
833 | * This is where hid.c calls us to disconnect a hiddev device from the | |
834 | * corresponding hid device (usually because the usb device has disconnected) | |
835 | */ | |
836 | static struct usb_class_driver hiddev_class; | |
837 | void hiddev_disconnect(struct hid_device *hid) | |
838 | { | |
839 | struct hiddev *hiddev = hid->hiddev; | |
4916b3a5 | 840 | struct usbhid_device *usbhid = hid->driver_data; |
1da177e4 LT |
841 | |
842 | hiddev->exist = 0; | |
843 | ||
844 | hiddev_table[hiddev->hid->minor - HIDDEV_MINOR_BASE] = NULL; | |
4916b3a5 | 845 | usb_deregister_dev(usbhid->intf, &hiddev_class); |
1da177e4 LT |
846 | |
847 | if (hiddev->open) { | |
4916b3a5 | 848 | usbhid_close(hiddev->hid); |
1da177e4 LT |
849 | wake_up_interruptible(&hiddev->wait); |
850 | } else { | |
851 | kfree(hiddev); | |
852 | } | |
853 | } | |
854 | ||
855 | /* Currently this driver is a USB driver. It's not a conventional one in | |
856 | * the sense that it doesn't probe at the USB level. Instead it waits to | |
857 | * be connected by HID through the hiddev_connect / hiddev_disconnect | |
858 | * routines. The reason to register as a USB device is to gain part of the | |
859 | * minor number space from the USB major. | |
860 | * | |
861 | * In theory, should the HID code be generalized to more than one physical | |
862 | * medium (say, IEEE 1384), this driver will probably need to register its | |
863 | * own major number, and in doing so, no longer need to register with USB. | |
864 | * At that point the probe routine and hiddev_driver struct below will no | |
865 | * longer be useful. | |
866 | */ | |
867 | ||
868 | ||
869 | /* We never attach in this manner, and rely on HID to connect us. This | |
870 | * is why there is no disconnect routine defined in the usb_driver either. | |
871 | */ | |
05f091ab | 872 | static int hiddev_usbd_probe(struct usb_interface *intf, |
1da177e4 LT |
873 | const struct usb_device_id *hiddev_info) |
874 | { | |
875 | return -ENODEV; | |
876 | } | |
877 | ||
878 | ||
879 | static /* const */ struct usb_driver hiddev_driver = { | |
1da177e4 LT |
880 | .name = "hiddev", |
881 | .probe = hiddev_usbd_probe, | |
882 | }; | |
883 | ||
884 | int __init hiddev_init(void) | |
885 | { | |
1da177e4 LT |
886 | return usb_register(&hiddev_driver); |
887 | } | |
888 | ||
889 | void hiddev_exit(void) | |
890 | { | |
891 | usb_deregister(&hiddev_driver); | |
1da177e4 | 892 | } |