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1da177e4 LT |
1 | /* |
2 | * Joystick device driver for the input driver suite. | |
3 | * | |
4 | * Copyright (c) 1999-2002 Vojtech Pavlik | |
5 | * Copyright (c) 1999 Colin Van Dyke | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | */ | |
12 | ||
13 | #include <asm/io.h> | |
14 | #include <asm/system.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/errno.h> | |
17 | #include <linux/joystick.h> | |
18 | #include <linux/input.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/major.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/mm.h> | |
23 | #include <linux/miscdevice.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/poll.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/smp_lock.h> | |
28 | #include <linux/device.h> | |
1da177e4 LT |
29 | |
30 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
31 | MODULE_DESCRIPTION("Joystick device interfaces"); | |
32 | MODULE_SUPPORTED_DEVICE("input/js"); | |
33 | MODULE_LICENSE("GPL"); | |
34 | ||
35 | #define JOYDEV_MINOR_BASE 0 | |
36 | #define JOYDEV_MINORS 16 | |
37 | #define JOYDEV_BUFFER_SIZE 64 | |
38 | ||
1da177e4 LT |
39 | struct joydev { |
40 | int exist; | |
41 | int open; | |
42 | int minor; | |
43 | char name[16]; | |
44 | struct input_handle handle; | |
45 | wait_queue_head_t wait; | |
46 | struct list_head list; | |
47 | struct js_corr corr[ABS_MAX + 1]; | |
48 | struct JS_DATA_SAVE_TYPE glue; | |
49 | int nabs; | |
50 | int nkey; | |
51 | __u16 keymap[KEY_MAX - BTN_MISC + 1]; | |
52 | __u16 keypam[KEY_MAX - BTN_MISC + 1]; | |
53 | __u8 absmap[ABS_MAX + 1]; | |
54 | __u8 abspam[ABS_MAX + 1]; | |
55 | __s16 abs[ABS_MAX + 1]; | |
56 | }; | |
57 | ||
58 | struct joydev_list { | |
59 | struct js_event buffer[JOYDEV_BUFFER_SIZE]; | |
60 | int head; | |
61 | int tail; | |
62 | int startup; | |
63 | struct fasync_struct *fasync; | |
64 | struct joydev *joydev; | |
65 | struct list_head node; | |
66 | }; | |
67 | ||
68 | static struct joydev *joydev_table[JOYDEV_MINORS]; | |
69 | ||
70 | static int joydev_correct(int value, struct js_corr *corr) | |
71 | { | |
72 | switch (corr->type) { | |
73 | case JS_CORR_NONE: | |
74 | break; | |
75 | case JS_CORR_BROKEN: | |
76 | value = value > corr->coef[0] ? (value < corr->coef[1] ? 0 : | |
77 | ((corr->coef[3] * (value - corr->coef[1])) >> 14)) : | |
78 | ((corr->coef[2] * (value - corr->coef[0])) >> 14); | |
79 | break; | |
80 | default: | |
81 | return 0; | |
82 | } | |
83 | ||
1e0afb28 | 84 | return value < -32767 ? -32767 : (value > 32767 ? 32767 : value); |
1da177e4 LT |
85 | } |
86 | ||
87 | static void joydev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value) | |
88 | { | |
89 | struct joydev *joydev = handle->private; | |
90 | struct joydev_list *list; | |
91 | struct js_event event; | |
92 | ||
93 | switch (type) { | |
94 | ||
95 | case EV_KEY: | |
1e0afb28 DT |
96 | if (code < BTN_MISC || value == 2) |
97 | return; | |
1da177e4 LT |
98 | event.type = JS_EVENT_BUTTON; |
99 | event.number = joydev->keymap[code - BTN_MISC]; | |
100 | event.value = value; | |
101 | break; | |
102 | ||
103 | case EV_ABS: | |
104 | event.type = JS_EVENT_AXIS; | |
105 | event.number = joydev->absmap[code]; | |
106 | event.value = joydev_correct(value, joydev->corr + event.number); | |
1e0afb28 DT |
107 | if (event.value == joydev->abs[event.number]) |
108 | return; | |
1da177e4 LT |
109 | joydev->abs[event.number] = event.value; |
110 | break; | |
111 | ||
112 | default: | |
113 | return; | |
114 | } | |
115 | ||
6f5eacfc | 116 | event.time = jiffies_to_msecs(jiffies); |
1da177e4 LT |
117 | |
118 | list_for_each_entry(list, &joydev->list, node) { | |
119 | ||
120 | memcpy(list->buffer + list->head, &event, sizeof(struct js_event)); | |
121 | ||
122 | if (list->startup == joydev->nabs + joydev->nkey) | |
123 | if (list->tail == (list->head = (list->head + 1) & (JOYDEV_BUFFER_SIZE - 1))) | |
124 | list->startup = 0; | |
125 | ||
126 | kill_fasync(&list->fasync, SIGIO, POLL_IN); | |
127 | } | |
128 | ||
129 | wake_up_interruptible(&joydev->wait); | |
130 | } | |
131 | ||
132 | static int joydev_fasync(int fd, struct file *file, int on) | |
133 | { | |
134 | int retval; | |
135 | struct joydev_list *list = file->private_data; | |
1e0afb28 | 136 | |
1da177e4 | 137 | retval = fasync_helper(fd, file, on, &list->fasync); |
1e0afb28 | 138 | |
1da177e4 LT |
139 | return retval < 0 ? retval : 0; |
140 | } | |
141 | ||
142 | static void joydev_free(struct joydev *joydev) | |
143 | { | |
144 | joydev_table[joydev->minor] = NULL; | |
145 | kfree(joydev); | |
146 | } | |
147 | ||
148 | static int joydev_release(struct inode * inode, struct file * file) | |
149 | { | |
150 | struct joydev_list *list = file->private_data; | |
151 | ||
152 | joydev_fasync(-1, file, 0); | |
153 | ||
154 | list_del(&list->node); | |
155 | ||
156 | if (!--list->joydev->open) { | |
157 | if (list->joydev->exist) | |
158 | input_close_device(&list->joydev->handle); | |
159 | else | |
160 | joydev_free(list->joydev); | |
161 | } | |
162 | ||
163 | kfree(list); | |
164 | return 0; | |
165 | } | |
166 | ||
167 | static int joydev_open(struct inode *inode, struct file *file) | |
168 | { | |
169 | struct joydev_list *list; | |
170 | int i = iminor(inode) - JOYDEV_MINOR_BASE; | |
171 | ||
172 | if (i >= JOYDEV_MINORS || !joydev_table[i]) | |
173 | return -ENODEV; | |
174 | ||
b39787a9 | 175 | if (!(list = kzalloc(sizeof(struct joydev_list), GFP_KERNEL))) |
1da177e4 | 176 | return -ENOMEM; |
1da177e4 LT |
177 | |
178 | list->joydev = joydev_table[i]; | |
179 | list_add_tail(&list->node, &joydev_table[i]->list); | |
180 | file->private_data = list; | |
181 | ||
182 | if (!list->joydev->open++) | |
183 | if (list->joydev->exist) | |
184 | input_open_device(&list->joydev->handle); | |
185 | ||
186 | return 0; | |
187 | } | |
188 | ||
189 | static ssize_t joydev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos) | |
190 | { | |
191 | return -EINVAL; | |
192 | } | |
193 | ||
194 | static ssize_t joydev_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
195 | { | |
196 | struct joydev_list *list = file->private_data; | |
197 | struct joydev *joydev = list->joydev; | |
198 | struct input_dev *input = joydev->handle.dev; | |
199 | int retval = 0; | |
200 | ||
201 | if (!list->joydev->exist) | |
202 | return -ENODEV; | |
203 | ||
204 | if (count < sizeof(struct js_event)) | |
205 | return -EINVAL; | |
206 | ||
207 | if (count == sizeof(struct JS_DATA_TYPE)) { | |
208 | ||
209 | struct JS_DATA_TYPE data; | |
210 | int i; | |
211 | ||
212 | for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++) | |
213 | data.buttons |= test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0; | |
214 | data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x; | |
215 | data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y; | |
216 | ||
217 | if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE))) | |
218 | return -EFAULT; | |
219 | ||
220 | list->startup = 0; | |
221 | list->tail = list->head; | |
222 | ||
223 | return sizeof(struct JS_DATA_TYPE); | |
224 | } | |
225 | ||
1e0afb28 DT |
226 | if (list->startup == joydev->nabs + joydev->nkey && |
227 | list->head == list->tail && (file->f_flags & O_NONBLOCK)) | |
228 | return -EAGAIN; | |
1da177e4 LT |
229 | |
230 | retval = wait_event_interruptible(list->joydev->wait, | |
1e0afb28 | 231 | !list->joydev->exist || |
1da177e4 LT |
232 | list->startup < joydev->nabs + joydev->nkey || |
233 | list->head != list->tail); | |
234 | ||
235 | if (retval) | |
236 | return retval; | |
237 | ||
238 | if (!list->joydev->exist) | |
239 | return -ENODEV; | |
240 | ||
241 | while (list->startup < joydev->nabs + joydev->nkey && retval + sizeof(struct js_event) <= count) { | |
242 | ||
243 | struct js_event event; | |
244 | ||
6f5eacfc | 245 | event.time = jiffies_to_msecs(jiffies); |
1da177e4 LT |
246 | |
247 | if (list->startup < joydev->nkey) { | |
248 | event.type = JS_EVENT_BUTTON | JS_EVENT_INIT; | |
249 | event.number = list->startup; | |
250 | event.value = !!test_bit(joydev->keypam[event.number], input->key); | |
251 | } else { | |
252 | event.type = JS_EVENT_AXIS | JS_EVENT_INIT; | |
253 | event.number = list->startup - joydev->nkey; | |
254 | event.value = joydev->abs[event.number]; | |
255 | } | |
256 | ||
257 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) | |
258 | return -EFAULT; | |
259 | ||
260 | list->startup++; | |
261 | retval += sizeof(struct js_event); | |
262 | } | |
263 | ||
264 | while (list->head != list->tail && retval + sizeof(struct js_event) <= count) { | |
265 | ||
266 | if (copy_to_user(buf + retval, list->buffer + list->tail, sizeof(struct js_event))) | |
267 | return -EFAULT; | |
268 | ||
269 | list->tail = (list->tail + 1) & (JOYDEV_BUFFER_SIZE - 1); | |
270 | retval += sizeof(struct js_event); | |
271 | } | |
272 | ||
273 | return retval; | |
274 | } | |
275 | ||
276 | /* No kernel lock - fine */ | |
277 | static unsigned int joydev_poll(struct file *file, poll_table *wait) | |
278 | { | |
279 | struct joydev_list *list = file->private_data; | |
1e0afb28 | 280 | |
1da177e4 | 281 | poll_wait(file, &list->joydev->wait, wait); |
1e0afb28 | 282 | return ((list->head != list->tail || list->startup < list->joydev->nabs + list->joydev->nkey) ? |
1da177e4 LT |
283 | (POLLIN | POLLRDNORM) : 0) | (list->joydev->exist ? 0 : (POLLHUP | POLLERR)); |
284 | } | |
285 | ||
024ac44c | 286 | static int joydev_ioctl_common(struct joydev *joydev, unsigned int cmd, void __user *argp) |
1da177e4 | 287 | { |
1da177e4 | 288 | struct input_dev *dev = joydev->handle.dev; |
1da177e4 LT |
289 | int i, j; |
290 | ||
1da177e4 LT |
291 | switch (cmd) { |
292 | ||
293 | case JS_SET_CAL: | |
294 | return copy_from_user(&joydev->glue.JS_CORR, argp, | |
024ac44c | 295 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 296 | |
1da177e4 LT |
297 | case JS_GET_CAL: |
298 | return copy_to_user(argp, &joydev->glue.JS_CORR, | |
024ac44c | 299 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 300 | |
1da177e4 | 301 | case JS_SET_TIMEOUT: |
024ac44c | 302 | return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); |
1e0afb28 | 303 | |
1da177e4 | 304 | case JS_GET_TIMEOUT: |
024ac44c | 305 | return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); |
1da177e4 LT |
306 | |
307 | case JSIOCGVERSION: | |
024ac44c | 308 | return put_user(JS_VERSION, (__u32 __user *) argp); |
1e0afb28 | 309 | |
1da177e4 | 310 | case JSIOCGAXES: |
024ac44c | 311 | return put_user(joydev->nabs, (__u8 __user *) argp); |
1e0afb28 | 312 | |
1da177e4 | 313 | case JSIOCGBUTTONS: |
024ac44c | 314 | return put_user(joydev->nkey, (__u8 __user *) argp); |
1e0afb28 | 315 | |
1da177e4 LT |
316 | case JSIOCSCORR: |
317 | if (copy_from_user(joydev->corr, argp, | |
024ac44c | 318 | sizeof(joydev->corr[0]) * joydev->nabs)) |
1da177e4 LT |
319 | return -EFAULT; |
320 | for (i = 0; i < joydev->nabs; i++) { | |
321 | j = joydev->abspam[i]; | |
322 | joydev->abs[i] = joydev_correct(dev->abs[j], joydev->corr + i); | |
323 | } | |
324 | return 0; | |
1e0afb28 | 325 | |
1da177e4 LT |
326 | case JSIOCGCORR: |
327 | return copy_to_user(argp, joydev->corr, | |
024ac44c | 328 | sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0; |
1e0afb28 | 329 | |
1da177e4 LT |
330 | case JSIOCSAXMAP: |
331 | if (copy_from_user(joydev->abspam, argp, sizeof(__u8) * (ABS_MAX + 1))) | |
332 | return -EFAULT; | |
333 | for (i = 0; i < joydev->nabs; i++) { | |
1e0afb28 DT |
334 | if (joydev->abspam[i] > ABS_MAX) |
335 | return -EINVAL; | |
1da177e4 LT |
336 | joydev->absmap[joydev->abspam[i]] = i; |
337 | } | |
338 | return 0; | |
1e0afb28 | 339 | |
1da177e4 LT |
340 | case JSIOCGAXMAP: |
341 | return copy_to_user(argp, joydev->abspam, | |
342 | sizeof(__u8) * (ABS_MAX + 1)) ? -EFAULT : 0; | |
1e0afb28 | 343 | |
1da177e4 LT |
344 | case JSIOCSBTNMAP: |
345 | if (copy_from_user(joydev->keypam, argp, sizeof(__u16) * (KEY_MAX - BTN_MISC + 1))) | |
346 | return -EFAULT; | |
347 | for (i = 0; i < joydev->nkey; i++) { | |
1e0afb28 DT |
348 | if (joydev->keypam[i] > KEY_MAX || joydev->keypam[i] < BTN_MISC) |
349 | return -EINVAL; | |
1da177e4 LT |
350 | joydev->keymap[joydev->keypam[i] - BTN_MISC] = i; |
351 | } | |
352 | return 0; | |
1e0afb28 | 353 | |
1da177e4 LT |
354 | case JSIOCGBTNMAP: |
355 | return copy_to_user(argp, joydev->keypam, | |
356 | sizeof(__u16) * (KEY_MAX - BTN_MISC + 1)) ? -EFAULT : 0; | |
1e0afb28 | 357 | |
1da177e4 LT |
358 | default: |
359 | if ((cmd & ~(_IOC_SIZEMASK << _IOC_SIZESHIFT)) == JSIOCGNAME(0)) { | |
360 | int len; | |
1e0afb28 DT |
361 | if (!dev->name) |
362 | return 0; | |
1da177e4 | 363 | len = strlen(dev->name) + 1; |
1e0afb28 DT |
364 | if (len > _IOC_SIZE(cmd)) |
365 | len = _IOC_SIZE(cmd); | |
366 | if (copy_to_user(argp, dev->name, len)) | |
367 | return -EFAULT; | |
1da177e4 LT |
368 | return len; |
369 | } | |
370 | } | |
371 | return -EINVAL; | |
372 | } | |
373 | ||
024ac44c JF |
374 | #ifdef CONFIG_COMPAT |
375 | static long joydev_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
376 | { | |
377 | struct joydev_list *list = file->private_data; | |
378 | struct joydev *joydev = list->joydev; | |
379 | void __user *argp = (void __user *)arg; | |
380 | s32 tmp32; | |
381 | struct JS_DATA_SAVE_TYPE_32 ds32; | |
382 | int err; | |
383 | ||
1e0afb28 DT |
384 | if (!joydev->exist) |
385 | return -ENODEV; | |
386 | ||
024ac44c JF |
387 | switch(cmd) { |
388 | case JS_SET_TIMELIMIT: | |
389 | err = get_user(tmp32, (s32 __user *) arg); | |
390 | if (err == 0) | |
391 | joydev->glue.JS_TIMELIMIT = tmp32; | |
392 | break; | |
393 | case JS_GET_TIMELIMIT: | |
394 | tmp32 = joydev->glue.JS_TIMELIMIT; | |
395 | err = put_user(tmp32, (s32 __user *) arg); | |
396 | break; | |
397 | ||
398 | case JS_SET_ALL: | |
399 | err = copy_from_user(&ds32, argp, | |
400 | sizeof(ds32)) ? -EFAULT : 0; | |
401 | if (err == 0) { | |
402 | joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT; | |
403 | joydev->glue.BUSY = ds32.BUSY; | |
404 | joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME; | |
405 | joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT; | |
406 | joydev->glue.JS_SAVE = ds32.JS_SAVE; | |
407 | joydev->glue.JS_CORR = ds32.JS_CORR; | |
408 | } | |
409 | break; | |
410 | ||
411 | case JS_GET_ALL: | |
412 | ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT; | |
413 | ds32.BUSY = joydev->glue.BUSY; | |
414 | ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME; | |
415 | ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT; | |
416 | ds32.JS_SAVE = joydev->glue.JS_SAVE; | |
417 | ds32.JS_CORR = joydev->glue.JS_CORR; | |
418 | ||
1e0afb28 | 419 | err = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0; |
024ac44c JF |
420 | break; |
421 | ||
422 | default: | |
423 | err = joydev_ioctl_common(joydev, cmd, argp); | |
424 | } | |
425 | return err; | |
426 | } | |
427 | #endif /* CONFIG_COMPAT */ | |
428 | ||
429 | static int joydev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) | |
430 | { | |
431 | struct joydev_list *list = file->private_data; | |
432 | struct joydev *joydev = list->joydev; | |
433 | void __user *argp = (void __user *)arg; | |
434 | ||
1e0afb28 DT |
435 | if (!joydev->exist) |
436 | return -ENODEV; | |
024ac44c JF |
437 | |
438 | switch(cmd) { | |
439 | case JS_SET_TIMELIMIT: | |
440 | return get_user(joydev->glue.JS_TIMELIMIT, (long __user *) arg); | |
441 | case JS_GET_TIMELIMIT: | |
442 | return put_user(joydev->glue.JS_TIMELIMIT, (long __user *) arg); | |
443 | case JS_SET_ALL: | |
444 | return copy_from_user(&joydev->glue, argp, | |
445 | sizeof(joydev->glue)) ? -EFAULT : 0; | |
446 | case JS_GET_ALL: | |
447 | return copy_to_user(argp, &joydev->glue, | |
448 | sizeof(joydev->glue)) ? -EFAULT : 0; | |
449 | default: | |
450 | return joydev_ioctl_common(joydev, cmd, argp); | |
451 | } | |
452 | } | |
453 | ||
66e66118 | 454 | static const struct file_operations joydev_fops = { |
1da177e4 LT |
455 | .owner = THIS_MODULE, |
456 | .read = joydev_read, | |
457 | .write = joydev_write, | |
458 | .poll = joydev_poll, | |
459 | .open = joydev_open, | |
460 | .release = joydev_release, | |
461 | .ioctl = joydev_ioctl, | |
024ac44c JF |
462 | #ifdef CONFIG_COMPAT |
463 | .compat_ioctl = joydev_compat_ioctl, | |
464 | #endif | |
1da177e4 LT |
465 | .fasync = joydev_fasync, |
466 | }; | |
467 | ||
66e66118 DT |
468 | static struct input_handle *joydev_connect(struct input_handler *handler, struct input_dev *dev, |
469 | const struct input_device_id *id) | |
1da177e4 LT |
470 | { |
471 | struct joydev *joydev; | |
c9bcd582 | 472 | struct class_device *cdev; |
1da177e4 LT |
473 | int i, j, t, minor; |
474 | ||
475 | for (minor = 0; minor < JOYDEV_MINORS && joydev_table[minor]; minor++); | |
476 | if (minor == JOYDEV_MINORS) { | |
477 | printk(KERN_ERR "joydev: no more free joydev devices\n"); | |
478 | return NULL; | |
479 | } | |
480 | ||
b39787a9 | 481 | if (!(joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL))) |
1da177e4 | 482 | return NULL; |
1da177e4 LT |
483 | |
484 | INIT_LIST_HEAD(&joydev->list); | |
485 | init_waitqueue_head(&joydev->wait); | |
486 | ||
487 | joydev->minor = minor; | |
488 | joydev->exist = 1; | |
489 | joydev->handle.dev = dev; | |
490 | joydev->handle.name = joydev->name; | |
491 | joydev->handle.handler = handler; | |
492 | joydev->handle.private = joydev; | |
493 | sprintf(joydev->name, "js%d", minor); | |
494 | ||
495 | for (i = 0; i < ABS_MAX + 1; i++) | |
496 | if (test_bit(i, dev->absbit)) { | |
497 | joydev->absmap[i] = joydev->nabs; | |
498 | joydev->abspam[joydev->nabs] = i; | |
499 | joydev->nabs++; | |
500 | } | |
501 | ||
502 | for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++) | |
503 | if (test_bit(i + BTN_MISC, dev->keybit)) { | |
504 | joydev->keymap[i] = joydev->nkey; | |
505 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
506 | joydev->nkey++; | |
507 | } | |
508 | ||
f24949e8 | 509 | for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++) |
1da177e4 LT |
510 | if (test_bit(i + BTN_MISC, dev->keybit)) { |
511 | joydev->keymap[i] = joydev->nkey; | |
512 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
513 | joydev->nkey++; | |
514 | } | |
515 | ||
516 | for (i = 0; i < joydev->nabs; i++) { | |
517 | j = joydev->abspam[i]; | |
518 | if (dev->absmax[j] == dev->absmin[j]) { | |
519 | joydev->corr[i].type = JS_CORR_NONE; | |
520 | joydev->abs[i] = dev->abs[j]; | |
521 | continue; | |
522 | } | |
523 | joydev->corr[i].type = JS_CORR_BROKEN; | |
524 | joydev->corr[i].prec = dev->absfuzz[j]; | |
525 | joydev->corr[i].coef[0] = (dev->absmax[j] + dev->absmin[j]) / 2 - dev->absflat[j]; | |
526 | joydev->corr[i].coef[1] = (dev->absmax[j] + dev->absmin[j]) / 2 + dev->absflat[j]; | |
527 | if (!(t = ((dev->absmax[j] - dev->absmin[j]) / 2 - 2 * dev->absflat[j]))) | |
528 | continue; | |
529 | joydev->corr[i].coef[2] = (1 << 29) / t; | |
530 | joydev->corr[i].coef[3] = (1 << 29) / t; | |
531 | ||
532 | joydev->abs[i] = joydev_correct(dev->abs[j], joydev->corr + i); | |
533 | } | |
534 | ||
535 | joydev_table[minor] = joydev; | |
536 | ||
c9bcd582 | 537 | cdev = class_device_create(&input_class, &dev->cdev, |
1235686f | 538 | MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor), |
c9bcd582 GKH |
539 | dev->cdev.dev, joydev->name); |
540 | ||
541 | /* temporary symlink to keep userspace happy */ | |
542 | sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj, | |
543 | joydev->name); | |
1da177e4 LT |
544 | |
545 | return &joydev->handle; | |
546 | } | |
547 | ||
548 | static void joydev_disconnect(struct input_handle *handle) | |
549 | { | |
550 | struct joydev *joydev = handle->private; | |
551 | struct joydev_list *list; | |
552 | ||
c9bcd582 | 553 | sysfs_remove_link(&input_class.subsys.kset.kobj, joydev->name); |
ea9f240b | 554 | class_device_destroy(&input_class, MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + joydev->minor)); |
1da177e4 LT |
555 | joydev->exist = 0; |
556 | ||
557 | if (joydev->open) { | |
558 | input_close_device(handle); | |
559 | wake_up_interruptible(&joydev->wait); | |
560 | list_for_each_entry(list, &joydev->list, node) | |
561 | kill_fasync(&list->fasync, SIGIO, POLL_HUP); | |
562 | } else | |
563 | joydev_free(joydev); | |
564 | } | |
565 | ||
66e66118 | 566 | static const struct input_device_id joydev_blacklist[] = { |
1da177e4 LT |
567 | { |
568 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
569 | .evbit = { BIT(EV_KEY) }, | |
570 | .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) }, | |
1e0afb28 DT |
571 | }, /* Avoid itouchpads, touchscreens and tablets */ |
572 | { } /* Terminating entry */ | |
1da177e4 LT |
573 | }; |
574 | ||
66e66118 | 575 | static const struct input_device_id joydev_ids[] = { |
1da177e4 LT |
576 | { |
577 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
578 | .evbit = { BIT(EV_ABS) }, | |
579 | .absbit = { BIT(ABS_X) }, | |
580 | }, | |
581 | { | |
582 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
583 | .evbit = { BIT(EV_ABS) }, | |
584 | .absbit = { BIT(ABS_WHEEL) }, | |
585 | }, | |
586 | { | |
587 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
588 | .evbit = { BIT(EV_ABS) }, | |
589 | .absbit = { BIT(ABS_THROTTLE) }, | |
590 | }, | |
1e0afb28 | 591 | { } /* Terminating entry */ |
1da177e4 LT |
592 | }; |
593 | ||
594 | MODULE_DEVICE_TABLE(input, joydev_ids); | |
595 | ||
596 | static struct input_handler joydev_handler = { | |
597 | .event = joydev_event, | |
598 | .connect = joydev_connect, | |
599 | .disconnect = joydev_disconnect, | |
600 | .fops = &joydev_fops, | |
601 | .minor = JOYDEV_MINOR_BASE, | |
602 | .name = "joydev", | |
603 | .id_table = joydev_ids, | |
1e0afb28 | 604 | .blacklist = joydev_blacklist, |
1da177e4 LT |
605 | }; |
606 | ||
607 | static int __init joydev_init(void) | |
608 | { | |
4263cf0f | 609 | return input_register_handler(&joydev_handler); |
1da177e4 LT |
610 | } |
611 | ||
612 | static void __exit joydev_exit(void) | |
613 | { | |
614 | input_unregister_handler(&joydev_handler); | |
615 | } | |
616 | ||
617 | module_init(joydev_init); | |
618 | module_exit(joydev_exit); |