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Commit | Line | Data |
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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> | |
1da177e4 | 27 | #include <linux/device.h> |
1da177e4 LT |
28 | |
29 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
30 | MODULE_DESCRIPTION("Joystick device interfaces"); | |
31 | MODULE_SUPPORTED_DEVICE("input/js"); | |
32 | MODULE_LICENSE("GPL"); | |
33 | ||
34 | #define JOYDEV_MINOR_BASE 0 | |
35 | #define JOYDEV_MINORS 16 | |
36 | #define JOYDEV_BUFFER_SIZE 64 | |
37 | ||
1da177e4 LT |
38 | struct joydev { |
39 | int exist; | |
40 | int open; | |
41 | int minor; | |
42 | char name[16]; | |
43 | struct input_handle handle; | |
44 | wait_queue_head_t wait; | |
d0ffb9be | 45 | struct list_head client_list; |
9657d75c DT |
46 | struct device dev; |
47 | ||
1da177e4 LT |
48 | struct js_corr corr[ABS_MAX + 1]; |
49 | struct JS_DATA_SAVE_TYPE glue; | |
50 | int nabs; | |
51 | int nkey; | |
52 | __u16 keymap[KEY_MAX - BTN_MISC + 1]; | |
53 | __u16 keypam[KEY_MAX - BTN_MISC + 1]; | |
54 | __u8 absmap[ABS_MAX + 1]; | |
55 | __u8 abspam[ABS_MAX + 1]; | |
56 | __s16 abs[ABS_MAX + 1]; | |
57 | }; | |
58 | ||
d0ffb9be | 59 | struct joydev_client { |
1da177e4 LT |
60 | struct js_event buffer[JOYDEV_BUFFER_SIZE]; |
61 | int head; | |
62 | int tail; | |
63 | int startup; | |
64 | struct fasync_struct *fasync; | |
65 | struct joydev *joydev; | |
66 | struct list_head node; | |
67 | }; | |
68 | ||
69 | static struct joydev *joydev_table[JOYDEV_MINORS]; | |
70 | ||
71 | static int joydev_correct(int value, struct js_corr *corr) | |
72 | { | |
73 | switch (corr->type) { | |
74 | case JS_CORR_NONE: | |
75 | break; | |
76 | case JS_CORR_BROKEN: | |
77 | value = value > corr->coef[0] ? (value < corr->coef[1] ? 0 : | |
78 | ((corr->coef[3] * (value - corr->coef[1])) >> 14)) : | |
79 | ((corr->coef[2] * (value - corr->coef[0])) >> 14); | |
80 | break; | |
81 | default: | |
82 | return 0; | |
83 | } | |
84 | ||
1e0afb28 | 85 | return value < -32767 ? -32767 : (value > 32767 ? 32767 : value); |
1da177e4 LT |
86 | } |
87 | ||
88 | static void joydev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value) | |
89 | { | |
90 | struct joydev *joydev = handle->private; | |
d0ffb9be | 91 | struct joydev_client *client; |
1da177e4 LT |
92 | struct js_event event; |
93 | ||
94 | switch (type) { | |
95 | ||
96 | case EV_KEY: | |
1e0afb28 DT |
97 | if (code < BTN_MISC || value == 2) |
98 | return; | |
1da177e4 LT |
99 | event.type = JS_EVENT_BUTTON; |
100 | event.number = joydev->keymap[code - BTN_MISC]; | |
101 | event.value = value; | |
102 | break; | |
103 | ||
104 | case EV_ABS: | |
105 | event.type = JS_EVENT_AXIS; | |
106 | event.number = joydev->absmap[code]; | |
107 | event.value = joydev_correct(value, joydev->corr + event.number); | |
1e0afb28 DT |
108 | if (event.value == joydev->abs[event.number]) |
109 | return; | |
1da177e4 LT |
110 | joydev->abs[event.number] = event.value; |
111 | break; | |
112 | ||
113 | default: | |
114 | return; | |
115 | } | |
116 | ||
6f5eacfc | 117 | event.time = jiffies_to_msecs(jiffies); |
1da177e4 | 118 | |
d0ffb9be | 119 | list_for_each_entry(client, &joydev->client_list, node) { |
1da177e4 | 120 | |
d0ffb9be | 121 | memcpy(client->buffer + client->head, &event, sizeof(struct js_event)); |
1da177e4 | 122 | |
d0ffb9be DT |
123 | if (client->startup == joydev->nabs + joydev->nkey) |
124 | if (client->tail == (client->head = (client->head + 1) & (JOYDEV_BUFFER_SIZE - 1))) | |
125 | client->startup = 0; | |
1da177e4 | 126 | |
d0ffb9be | 127 | kill_fasync(&client->fasync, SIGIO, POLL_IN); |
1da177e4 LT |
128 | } |
129 | ||
130 | wake_up_interruptible(&joydev->wait); | |
131 | } | |
132 | ||
133 | static int joydev_fasync(int fd, struct file *file, int on) | |
134 | { | |
135 | int retval; | |
d0ffb9be | 136 | struct joydev_client *client = file->private_data; |
1e0afb28 | 137 | |
d0ffb9be | 138 | retval = fasync_helper(fd, file, on, &client->fasync); |
1e0afb28 | 139 | |
1da177e4 LT |
140 | return retval < 0 ? retval : 0; |
141 | } | |
142 | ||
9657d75c | 143 | static void joydev_free(struct device *dev) |
1da177e4 | 144 | { |
9657d75c DT |
145 | struct joydev *joydev = container_of(dev, struct joydev, dev); |
146 | ||
1da177e4 LT |
147 | joydev_table[joydev->minor] = NULL; |
148 | kfree(joydev); | |
149 | } | |
150 | ||
d0ffb9be | 151 | static int joydev_release(struct inode *inode, struct file *file) |
1da177e4 | 152 | { |
d0ffb9be DT |
153 | struct joydev_client *client = file->private_data; |
154 | struct joydev *joydev = client->joydev; | |
1da177e4 LT |
155 | |
156 | joydev_fasync(-1, file, 0); | |
157 | ||
d0ffb9be DT |
158 | list_del(&client->node); |
159 | kfree(client); | |
1da177e4 | 160 | |
9657d75c DT |
161 | if (!--joydev->open && joydev->exist) |
162 | input_close_device(&joydev->handle); | |
163 | ||
164 | put_device(&joydev->dev); | |
1da177e4 | 165 | |
1da177e4 LT |
166 | return 0; |
167 | } | |
168 | ||
169 | static int joydev_open(struct inode *inode, struct file *file) | |
170 | { | |
d0ffb9be DT |
171 | struct joydev_client *client; |
172 | struct joydev *joydev; | |
1da177e4 | 173 | int i = iminor(inode) - JOYDEV_MINOR_BASE; |
d542ed82 | 174 | int error; |
1da177e4 | 175 | |
d0ffb9be DT |
176 | if (i >= JOYDEV_MINORS) |
177 | return -ENODEV; | |
1da177e4 | 178 | |
d0ffb9be DT |
179 | joydev = joydev_table[i]; |
180 | if (!joydev || !joydev->exist) | |
1da177e4 LT |
181 | return -ENODEV; |
182 | ||
9657d75c DT |
183 | get_device(&joydev->dev); |
184 | ||
d0ffb9be | 185 | client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL); |
9657d75c DT |
186 | if (!client) { |
187 | error = -ENOMEM; | |
188 | goto err_put_joydev; | |
189 | } | |
1da177e4 | 190 | |
d0ffb9be DT |
191 | client->joydev = joydev; |
192 | list_add_tail(&client->node, &joydev->client_list); | |
1da177e4 | 193 | |
d542ed82 DT |
194 | if (!joydev->open++ && joydev->exist) { |
195 | error = input_open_device(&joydev->handle); | |
9657d75c DT |
196 | if (error) |
197 | goto err_free_client; | |
d542ed82 | 198 | } |
1da177e4 | 199 | |
d0ffb9be | 200 | file->private_data = client; |
1da177e4 | 201 | return 0; |
9657d75c DT |
202 | |
203 | err_free_client: | |
204 | list_del(&client->node); | |
205 | kfree(client); | |
206 | err_put_joydev: | |
207 | put_device(&joydev->dev); | |
208 | return error; | |
1da177e4 LT |
209 | } |
210 | ||
d0ffb9be | 211 | static ssize_t joydev_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) |
1da177e4 LT |
212 | { |
213 | return -EINVAL; | |
214 | } | |
215 | ||
216 | static ssize_t joydev_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
217 | { | |
d0ffb9be DT |
218 | struct joydev_client *client = file->private_data; |
219 | struct joydev *joydev = client->joydev; | |
1da177e4 LT |
220 | struct input_dev *input = joydev->handle.dev; |
221 | int retval = 0; | |
222 | ||
d0ffb9be | 223 | if (!joydev->exist) |
1da177e4 LT |
224 | return -ENODEV; |
225 | ||
226 | if (count < sizeof(struct js_event)) | |
227 | return -EINVAL; | |
228 | ||
229 | if (count == sizeof(struct JS_DATA_TYPE)) { | |
230 | ||
231 | struct JS_DATA_TYPE data; | |
232 | int i; | |
233 | ||
234 | for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++) | |
235 | data.buttons |= test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0; | |
236 | data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x; | |
237 | data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y; | |
238 | ||
239 | if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE))) | |
240 | return -EFAULT; | |
241 | ||
d0ffb9be DT |
242 | client->startup = 0; |
243 | client->tail = client->head; | |
1da177e4 LT |
244 | |
245 | return sizeof(struct JS_DATA_TYPE); | |
246 | } | |
247 | ||
d0ffb9be DT |
248 | if (client->startup == joydev->nabs + joydev->nkey && |
249 | client->head == client->tail && (file->f_flags & O_NONBLOCK)) | |
1e0afb28 | 250 | return -EAGAIN; |
1da177e4 | 251 | |
d0ffb9be DT |
252 | retval = wait_event_interruptible(joydev->wait, |
253 | !joydev->exist || | |
254 | client->startup < joydev->nabs + joydev->nkey || | |
255 | client->head != client->tail); | |
1da177e4 LT |
256 | if (retval) |
257 | return retval; | |
258 | ||
d0ffb9be | 259 | if (!joydev->exist) |
1da177e4 LT |
260 | return -ENODEV; |
261 | ||
d0ffb9be | 262 | while (client->startup < joydev->nabs + joydev->nkey && retval + sizeof(struct js_event) <= count) { |
1da177e4 LT |
263 | |
264 | struct js_event event; | |
265 | ||
6f5eacfc | 266 | event.time = jiffies_to_msecs(jiffies); |
1da177e4 | 267 | |
d0ffb9be | 268 | if (client->startup < joydev->nkey) { |
1da177e4 | 269 | event.type = JS_EVENT_BUTTON | JS_EVENT_INIT; |
d0ffb9be | 270 | event.number = client->startup; |
1da177e4 LT |
271 | event.value = !!test_bit(joydev->keypam[event.number], input->key); |
272 | } else { | |
273 | event.type = JS_EVENT_AXIS | JS_EVENT_INIT; | |
d0ffb9be | 274 | event.number = client->startup - joydev->nkey; |
1da177e4 LT |
275 | event.value = joydev->abs[event.number]; |
276 | } | |
277 | ||
278 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) | |
279 | return -EFAULT; | |
280 | ||
d0ffb9be | 281 | client->startup++; |
1da177e4 LT |
282 | retval += sizeof(struct js_event); |
283 | } | |
284 | ||
d0ffb9be | 285 | while (client->head != client->tail && retval + sizeof(struct js_event) <= count) { |
1da177e4 | 286 | |
d0ffb9be | 287 | if (copy_to_user(buf + retval, client->buffer + client->tail, sizeof(struct js_event))) |
1da177e4 LT |
288 | return -EFAULT; |
289 | ||
d0ffb9be | 290 | client->tail = (client->tail + 1) & (JOYDEV_BUFFER_SIZE - 1); |
1da177e4 LT |
291 | retval += sizeof(struct js_event); |
292 | } | |
293 | ||
294 | return retval; | |
295 | } | |
296 | ||
297 | /* No kernel lock - fine */ | |
298 | static unsigned int joydev_poll(struct file *file, poll_table *wait) | |
299 | { | |
d0ffb9be DT |
300 | struct joydev_client *client = file->private_data; |
301 | struct joydev *joydev = client->joydev; | |
1e0afb28 | 302 | |
d0ffb9be DT |
303 | poll_wait(file, &joydev->wait, wait); |
304 | return ((client->head != client->tail || client->startup < joydev->nabs + joydev->nkey) ? | |
305 | (POLLIN | POLLRDNORM) : 0) | (joydev->exist ? 0 : (POLLHUP | POLLERR)); | |
1da177e4 LT |
306 | } |
307 | ||
024ac44c | 308 | static int joydev_ioctl_common(struct joydev *joydev, unsigned int cmd, void __user *argp) |
1da177e4 | 309 | { |
1da177e4 | 310 | struct input_dev *dev = joydev->handle.dev; |
1da177e4 LT |
311 | int i, j; |
312 | ||
1da177e4 LT |
313 | switch (cmd) { |
314 | ||
315 | case JS_SET_CAL: | |
316 | return copy_from_user(&joydev->glue.JS_CORR, argp, | |
024ac44c | 317 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 318 | |
1da177e4 LT |
319 | case JS_GET_CAL: |
320 | return copy_to_user(argp, &joydev->glue.JS_CORR, | |
024ac44c | 321 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 322 | |
1da177e4 | 323 | case JS_SET_TIMEOUT: |
024ac44c | 324 | return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); |
1e0afb28 | 325 | |
1da177e4 | 326 | case JS_GET_TIMEOUT: |
024ac44c | 327 | return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); |
1da177e4 LT |
328 | |
329 | case JSIOCGVERSION: | |
024ac44c | 330 | return put_user(JS_VERSION, (__u32 __user *) argp); |
1e0afb28 | 331 | |
1da177e4 | 332 | case JSIOCGAXES: |
024ac44c | 333 | return put_user(joydev->nabs, (__u8 __user *) argp); |
1e0afb28 | 334 | |
1da177e4 | 335 | case JSIOCGBUTTONS: |
024ac44c | 336 | return put_user(joydev->nkey, (__u8 __user *) argp); |
1e0afb28 | 337 | |
1da177e4 LT |
338 | case JSIOCSCORR: |
339 | if (copy_from_user(joydev->corr, argp, | |
024ac44c | 340 | sizeof(joydev->corr[0]) * joydev->nabs)) |
1da177e4 LT |
341 | return -EFAULT; |
342 | for (i = 0; i < joydev->nabs; i++) { | |
343 | j = joydev->abspam[i]; | |
344 | joydev->abs[i] = joydev_correct(dev->abs[j], joydev->corr + i); | |
345 | } | |
346 | return 0; | |
1e0afb28 | 347 | |
1da177e4 LT |
348 | case JSIOCGCORR: |
349 | return copy_to_user(argp, joydev->corr, | |
024ac44c | 350 | sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0; |
1e0afb28 | 351 | |
1da177e4 LT |
352 | case JSIOCSAXMAP: |
353 | if (copy_from_user(joydev->abspam, argp, sizeof(__u8) * (ABS_MAX + 1))) | |
354 | return -EFAULT; | |
355 | for (i = 0; i < joydev->nabs; i++) { | |
1e0afb28 DT |
356 | if (joydev->abspam[i] > ABS_MAX) |
357 | return -EINVAL; | |
1da177e4 LT |
358 | joydev->absmap[joydev->abspam[i]] = i; |
359 | } | |
360 | return 0; | |
1e0afb28 | 361 | |
1da177e4 LT |
362 | case JSIOCGAXMAP: |
363 | return copy_to_user(argp, joydev->abspam, | |
364 | sizeof(__u8) * (ABS_MAX + 1)) ? -EFAULT : 0; | |
1e0afb28 | 365 | |
1da177e4 LT |
366 | case JSIOCSBTNMAP: |
367 | if (copy_from_user(joydev->keypam, argp, sizeof(__u16) * (KEY_MAX - BTN_MISC + 1))) | |
368 | return -EFAULT; | |
369 | for (i = 0; i < joydev->nkey; i++) { | |
1e0afb28 DT |
370 | if (joydev->keypam[i] > KEY_MAX || joydev->keypam[i] < BTN_MISC) |
371 | return -EINVAL; | |
1da177e4 LT |
372 | joydev->keymap[joydev->keypam[i] - BTN_MISC] = i; |
373 | } | |
374 | return 0; | |
1e0afb28 | 375 | |
1da177e4 LT |
376 | case JSIOCGBTNMAP: |
377 | return copy_to_user(argp, joydev->keypam, | |
378 | sizeof(__u16) * (KEY_MAX - BTN_MISC + 1)) ? -EFAULT : 0; | |
1e0afb28 | 379 | |
1da177e4 LT |
380 | default: |
381 | if ((cmd & ~(_IOC_SIZEMASK << _IOC_SIZESHIFT)) == JSIOCGNAME(0)) { | |
382 | int len; | |
1e0afb28 DT |
383 | if (!dev->name) |
384 | return 0; | |
1da177e4 | 385 | len = strlen(dev->name) + 1; |
1e0afb28 DT |
386 | if (len > _IOC_SIZE(cmd)) |
387 | len = _IOC_SIZE(cmd); | |
388 | if (copy_to_user(argp, dev->name, len)) | |
389 | return -EFAULT; | |
1da177e4 LT |
390 | return len; |
391 | } | |
392 | } | |
393 | return -EINVAL; | |
394 | } | |
395 | ||
024ac44c JF |
396 | #ifdef CONFIG_COMPAT |
397 | static long joydev_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
398 | { | |
d0ffb9be DT |
399 | struct joydev_client *client = file->private_data; |
400 | struct joydev *joydev = client->joydev; | |
024ac44c JF |
401 | void __user *argp = (void __user *)arg; |
402 | s32 tmp32; | |
403 | struct JS_DATA_SAVE_TYPE_32 ds32; | |
404 | int err; | |
405 | ||
1e0afb28 DT |
406 | if (!joydev->exist) |
407 | return -ENODEV; | |
408 | ||
024ac44c JF |
409 | switch(cmd) { |
410 | case JS_SET_TIMELIMIT: | |
411 | err = get_user(tmp32, (s32 __user *) arg); | |
412 | if (err == 0) | |
413 | joydev->glue.JS_TIMELIMIT = tmp32; | |
414 | break; | |
415 | case JS_GET_TIMELIMIT: | |
416 | tmp32 = joydev->glue.JS_TIMELIMIT; | |
417 | err = put_user(tmp32, (s32 __user *) arg); | |
418 | break; | |
419 | ||
420 | case JS_SET_ALL: | |
421 | err = copy_from_user(&ds32, argp, | |
422 | sizeof(ds32)) ? -EFAULT : 0; | |
423 | if (err == 0) { | |
424 | joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT; | |
425 | joydev->glue.BUSY = ds32.BUSY; | |
426 | joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME; | |
427 | joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT; | |
428 | joydev->glue.JS_SAVE = ds32.JS_SAVE; | |
429 | joydev->glue.JS_CORR = ds32.JS_CORR; | |
430 | } | |
431 | break; | |
432 | ||
433 | case JS_GET_ALL: | |
434 | ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT; | |
435 | ds32.BUSY = joydev->glue.BUSY; | |
436 | ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME; | |
437 | ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT; | |
438 | ds32.JS_SAVE = joydev->glue.JS_SAVE; | |
439 | ds32.JS_CORR = joydev->glue.JS_CORR; | |
440 | ||
1e0afb28 | 441 | err = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0; |
024ac44c JF |
442 | break; |
443 | ||
444 | default: | |
445 | err = joydev_ioctl_common(joydev, cmd, argp); | |
446 | } | |
447 | return err; | |
448 | } | |
449 | #endif /* CONFIG_COMPAT */ | |
450 | ||
451 | static int joydev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) | |
452 | { | |
d0ffb9be DT |
453 | struct joydev_client *client = file->private_data; |
454 | struct joydev *joydev = client->joydev; | |
024ac44c JF |
455 | void __user *argp = (void __user *)arg; |
456 | ||
1e0afb28 DT |
457 | if (!joydev->exist) |
458 | return -ENODEV; | |
024ac44c JF |
459 | |
460 | switch(cmd) { | |
461 | case JS_SET_TIMELIMIT: | |
462 | return get_user(joydev->glue.JS_TIMELIMIT, (long __user *) arg); | |
463 | case JS_GET_TIMELIMIT: | |
464 | return put_user(joydev->glue.JS_TIMELIMIT, (long __user *) arg); | |
465 | case JS_SET_ALL: | |
466 | return copy_from_user(&joydev->glue, argp, | |
467 | sizeof(joydev->glue)) ? -EFAULT : 0; | |
468 | case JS_GET_ALL: | |
469 | return copy_to_user(argp, &joydev->glue, | |
470 | sizeof(joydev->glue)) ? -EFAULT : 0; | |
471 | default: | |
472 | return joydev_ioctl_common(joydev, cmd, argp); | |
473 | } | |
474 | } | |
475 | ||
66e66118 | 476 | static const struct file_operations joydev_fops = { |
1da177e4 LT |
477 | .owner = THIS_MODULE, |
478 | .read = joydev_read, | |
479 | .write = joydev_write, | |
480 | .poll = joydev_poll, | |
481 | .open = joydev_open, | |
482 | .release = joydev_release, | |
483 | .ioctl = joydev_ioctl, | |
024ac44c JF |
484 | #ifdef CONFIG_COMPAT |
485 | .compat_ioctl = joydev_compat_ioctl, | |
486 | #endif | |
1da177e4 LT |
487 | .fasync = joydev_fasync, |
488 | }; | |
489 | ||
5b2a0826 DT |
490 | static int joydev_connect(struct input_handler *handler, struct input_dev *dev, |
491 | const struct input_device_id *id) | |
1da177e4 LT |
492 | { |
493 | struct joydev *joydev; | |
494 | int i, j, t, minor; | |
5b2a0826 | 495 | int error; |
1da177e4 LT |
496 | |
497 | for (minor = 0; minor < JOYDEV_MINORS && joydev_table[minor]; minor++); | |
498 | if (minor == JOYDEV_MINORS) { | |
499 | printk(KERN_ERR "joydev: no more free joydev devices\n"); | |
5b2a0826 | 500 | return -ENFILE; |
1da177e4 LT |
501 | } |
502 | ||
5b2a0826 DT |
503 | joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL); |
504 | if (!joydev) | |
505 | return -ENOMEM; | |
1da177e4 | 506 | |
d0ffb9be | 507 | INIT_LIST_HEAD(&joydev->client_list); |
1da177e4 LT |
508 | init_waitqueue_head(&joydev->wait); |
509 | ||
510 | joydev->minor = minor; | |
511 | joydev->exist = 1; | |
512 | joydev->handle.dev = dev; | |
513 | joydev->handle.name = joydev->name; | |
514 | joydev->handle.handler = handler; | |
515 | joydev->handle.private = joydev; | |
9657d75c | 516 | snprintf(joydev->name, sizeof(joydev->name), "js%d", minor); |
1da177e4 LT |
517 | |
518 | for (i = 0; i < ABS_MAX + 1; i++) | |
519 | if (test_bit(i, dev->absbit)) { | |
520 | joydev->absmap[i] = joydev->nabs; | |
521 | joydev->abspam[joydev->nabs] = i; | |
522 | joydev->nabs++; | |
523 | } | |
524 | ||
525 | for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++) | |
526 | if (test_bit(i + BTN_MISC, dev->keybit)) { | |
527 | joydev->keymap[i] = joydev->nkey; | |
528 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
529 | joydev->nkey++; | |
530 | } | |
531 | ||
f24949e8 | 532 | for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++) |
1da177e4 LT |
533 | if (test_bit(i + BTN_MISC, dev->keybit)) { |
534 | joydev->keymap[i] = joydev->nkey; | |
535 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
536 | joydev->nkey++; | |
537 | } | |
538 | ||
539 | for (i = 0; i < joydev->nabs; i++) { | |
540 | j = joydev->abspam[i]; | |
541 | if (dev->absmax[j] == dev->absmin[j]) { | |
542 | joydev->corr[i].type = JS_CORR_NONE; | |
543 | joydev->abs[i] = dev->abs[j]; | |
544 | continue; | |
545 | } | |
546 | joydev->corr[i].type = JS_CORR_BROKEN; | |
547 | joydev->corr[i].prec = dev->absfuzz[j]; | |
548 | joydev->corr[i].coef[0] = (dev->absmax[j] + dev->absmin[j]) / 2 - dev->absflat[j]; | |
549 | joydev->corr[i].coef[1] = (dev->absmax[j] + dev->absmin[j]) / 2 + dev->absflat[j]; | |
550 | if (!(t = ((dev->absmax[j] - dev->absmin[j]) / 2 - 2 * dev->absflat[j]))) | |
551 | continue; | |
552 | joydev->corr[i].coef[2] = (1 << 29) / t; | |
553 | joydev->corr[i].coef[3] = (1 << 29) / t; | |
554 | ||
555 | joydev->abs[i] = joydev_correct(dev->abs[j], joydev->corr + i); | |
556 | } | |
557 | ||
9657d75c DT |
558 | snprintf(joydev->dev.bus_id, sizeof(joydev->dev.bus_id), |
559 | "js%d", minor); | |
560 | joydev->dev.class = &input_class; | |
561 | joydev->dev.parent = &dev->dev; | |
562 | joydev->dev.devt = MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor); | |
563 | joydev->dev.release = joydev_free; | |
564 | device_initialize(&joydev->dev); | |
5b2a0826 | 565 | |
9657d75c | 566 | joydev_table[minor] = joydev; |
c9bcd582 | 567 | |
9657d75c | 568 | error = device_add(&joydev->dev); |
5b2a0826 | 569 | if (error) |
9657d75c | 570 | goto err_free_joydev; |
5b2a0826 DT |
571 | |
572 | error = input_register_handle(&joydev->handle); | |
573 | if (error) | |
9657d75c | 574 | goto err_delete_joydev; |
5b2a0826 DT |
575 | |
576 | return 0; | |
1da177e4 | 577 | |
9657d75c DT |
578 | err_delete_joydev: |
579 | device_del(&joydev->dev); | |
5b2a0826 | 580 | err_free_joydev: |
9657d75c | 581 | put_device(&joydev->dev); |
5b2a0826 | 582 | return error; |
1da177e4 LT |
583 | } |
584 | ||
5b2a0826 | 585 | |
1da177e4 LT |
586 | static void joydev_disconnect(struct input_handle *handle) |
587 | { | |
588 | struct joydev *joydev = handle->private; | |
d0ffb9be | 589 | struct joydev_client *client; |
1da177e4 | 590 | |
5b2a0826 | 591 | input_unregister_handle(handle); |
9657d75c | 592 | device_del(&joydev->dev); |
1da177e4 | 593 | |
1da177e4 LT |
594 | joydev->exist = 0; |
595 | ||
596 | if (joydev->open) { | |
597 | input_close_device(handle); | |
d0ffb9be DT |
598 | list_for_each_entry(client, &joydev->client_list, node) |
599 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
1dfa2812 | 600 | wake_up_interruptible(&joydev->wait); |
9657d75c DT |
601 | } |
602 | ||
603 | put_device(&joydev->dev); | |
1da177e4 LT |
604 | } |
605 | ||
66e66118 | 606 | static const struct input_device_id joydev_blacklist[] = { |
1da177e4 LT |
607 | { |
608 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
609 | .evbit = { BIT(EV_KEY) }, | |
610 | .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) }, | |
1e0afb28 DT |
611 | }, /* Avoid itouchpads, touchscreens and tablets */ |
612 | { } /* Terminating entry */ | |
1da177e4 LT |
613 | }; |
614 | ||
66e66118 | 615 | static const struct input_device_id joydev_ids[] = { |
1da177e4 LT |
616 | { |
617 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
618 | .evbit = { BIT(EV_ABS) }, | |
619 | .absbit = { BIT(ABS_X) }, | |
620 | }, | |
621 | { | |
622 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
623 | .evbit = { BIT(EV_ABS) }, | |
624 | .absbit = { BIT(ABS_WHEEL) }, | |
625 | }, | |
626 | { | |
627 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
628 | .evbit = { BIT(EV_ABS) }, | |
629 | .absbit = { BIT(ABS_THROTTLE) }, | |
630 | }, | |
1e0afb28 | 631 | { } /* Terminating entry */ |
1da177e4 LT |
632 | }; |
633 | ||
634 | MODULE_DEVICE_TABLE(input, joydev_ids); | |
635 | ||
636 | static struct input_handler joydev_handler = { | |
637 | .event = joydev_event, | |
638 | .connect = joydev_connect, | |
639 | .disconnect = joydev_disconnect, | |
640 | .fops = &joydev_fops, | |
641 | .minor = JOYDEV_MINOR_BASE, | |
642 | .name = "joydev", | |
643 | .id_table = joydev_ids, | |
1e0afb28 | 644 | .blacklist = joydev_blacklist, |
1da177e4 LT |
645 | }; |
646 | ||
647 | static int __init joydev_init(void) | |
648 | { | |
4263cf0f | 649 | return input_register_handler(&joydev_handler); |
1da177e4 LT |
650 | } |
651 | ||
652 | static void __exit joydev_exit(void) | |
653 | { | |
654 | input_unregister_handler(&joydev_handler); | |
655 | } | |
656 | ||
657 | module_init(joydev_init); | |
658 | module_exit(joydev_exit); |