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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> | |
a99bbaf5 | 21 | #include <linux/sched.h> |
1da177e4 LT |
22 | #include <linux/slab.h> |
23 | #include <linux/mm.h> | |
24 | #include <linux/miscdevice.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/poll.h> | |
27 | #include <linux/init.h> | |
1da177e4 | 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 | 39 | struct joydev { |
1da177e4 LT |
40 | int open; |
41 | int minor; | |
1da177e4 LT |
42 | struct input_handle handle; |
43 | wait_queue_head_t wait; | |
d0ffb9be | 44 | struct list_head client_list; |
b126207c DT |
45 | spinlock_t client_lock; /* protects client_list */ |
46 | struct mutex mutex; | |
9657d75c | 47 | struct device dev; |
20da92de | 48 | bool exist; |
9657d75c | 49 | |
81c2a3ba | 50 | struct js_corr corr[ABS_CNT]; |
1da177e4 LT |
51 | struct JS_DATA_SAVE_TYPE glue; |
52 | int nabs; | |
53 | int nkey; | |
54 | __u16 keymap[KEY_MAX - BTN_MISC + 1]; | |
55 | __u16 keypam[KEY_MAX - BTN_MISC + 1]; | |
81c2a3ba DM |
56 | __u8 absmap[ABS_CNT]; |
57 | __u8 abspam[ABS_CNT]; | |
58 | __s16 abs[ABS_CNT]; | |
1da177e4 LT |
59 | }; |
60 | ||
d0ffb9be | 61 | struct joydev_client { |
1da177e4 LT |
62 | struct js_event buffer[JOYDEV_BUFFER_SIZE]; |
63 | int head; | |
64 | int tail; | |
65 | int startup; | |
b126207c | 66 | spinlock_t buffer_lock; /* protects access to buffer, head and tail */ |
1da177e4 LT |
67 | struct fasync_struct *fasync; |
68 | struct joydev *joydev; | |
69 | struct list_head node; | |
70 | }; | |
71 | ||
72 | static struct joydev *joydev_table[JOYDEV_MINORS]; | |
b126207c | 73 | static DEFINE_MUTEX(joydev_table_mutex); |
1da177e4 LT |
74 | |
75 | static int joydev_correct(int value, struct js_corr *corr) | |
76 | { | |
77 | switch (corr->type) { | |
b126207c DT |
78 | |
79 | case JS_CORR_NONE: | |
80 | break; | |
81 | ||
82 | case JS_CORR_BROKEN: | |
83 | value = value > corr->coef[0] ? (value < corr->coef[1] ? 0 : | |
84 | ((corr->coef[3] * (value - corr->coef[1])) >> 14)) : | |
85 | ((corr->coef[2] * (value - corr->coef[0])) >> 14); | |
86 | break; | |
87 | ||
88 | default: | |
89 | return 0; | |
1da177e4 LT |
90 | } |
91 | ||
1e0afb28 | 92 | return value < -32767 ? -32767 : (value > 32767 ? 32767 : value); |
1da177e4 LT |
93 | } |
94 | ||
b126207c DT |
95 | static void joydev_pass_event(struct joydev_client *client, |
96 | struct js_event *event) | |
97 | { | |
98 | struct joydev *joydev = client->joydev; | |
99 | ||
100 | /* | |
101 | * IRQs already disabled, just acquire the lock | |
102 | */ | |
103 | spin_lock(&client->buffer_lock); | |
104 | ||
105 | client->buffer[client->head] = *event; | |
106 | ||
107 | if (client->startup == joydev->nabs + joydev->nkey) { | |
108 | client->head++; | |
109 | client->head &= JOYDEV_BUFFER_SIZE - 1; | |
110 | if (client->tail == client->head) | |
111 | client->startup = 0; | |
112 | } | |
113 | ||
114 | spin_unlock(&client->buffer_lock); | |
115 | ||
116 | kill_fasync(&client->fasync, SIGIO, POLL_IN); | |
117 | } | |
118 | ||
119 | static void joydev_event(struct input_handle *handle, | |
120 | unsigned int type, unsigned int code, int value) | |
1da177e4 LT |
121 | { |
122 | struct joydev *joydev = handle->private; | |
d0ffb9be | 123 | struct joydev_client *client; |
1da177e4 LT |
124 | struct js_event event; |
125 | ||
126 | switch (type) { | |
127 | ||
b126207c DT |
128 | case EV_KEY: |
129 | if (code < BTN_MISC || value == 2) | |
130 | return; | |
131 | event.type = JS_EVENT_BUTTON; | |
132 | event.number = joydev->keymap[code - BTN_MISC]; | |
133 | event.value = value; | |
134 | break; | |
1da177e4 | 135 | |
b126207c DT |
136 | case EV_ABS: |
137 | event.type = JS_EVENT_AXIS; | |
138 | event.number = joydev->absmap[code]; | |
139 | event.value = joydev_correct(value, | |
140 | &joydev->corr[event.number]); | |
141 | if (event.value == joydev->abs[event.number]) | |
1da177e4 | 142 | return; |
b126207c DT |
143 | joydev->abs[event.number] = event.value; |
144 | break; | |
145 | ||
146 | default: | |
147 | return; | |
1da177e4 LT |
148 | } |
149 | ||
6f5eacfc | 150 | event.time = jiffies_to_msecs(jiffies); |
1da177e4 | 151 | |
82ba56c2 | 152 | rcu_read_lock(); |
b126207c DT |
153 | list_for_each_entry_rcu(client, &joydev->client_list, node) |
154 | joydev_pass_event(client, &event); | |
82ba56c2 | 155 | rcu_read_unlock(); |
1da177e4 LT |
156 | |
157 | wake_up_interruptible(&joydev->wait); | |
158 | } | |
159 | ||
160 | static int joydev_fasync(int fd, struct file *file, int on) | |
161 | { | |
d0ffb9be | 162 | struct joydev_client *client = file->private_data; |
1e0afb28 | 163 | |
60aa4924 | 164 | return fasync_helper(fd, file, on, &client->fasync); |
1da177e4 LT |
165 | } |
166 | ||
9657d75c | 167 | static void joydev_free(struct device *dev) |
1da177e4 | 168 | { |
9657d75c DT |
169 | struct joydev *joydev = container_of(dev, struct joydev, dev); |
170 | ||
a7097ff8 | 171 | input_put_device(joydev->handle.dev); |
1da177e4 LT |
172 | kfree(joydev); |
173 | } | |
174 | ||
b126207c DT |
175 | static void joydev_attach_client(struct joydev *joydev, |
176 | struct joydev_client *client) | |
177 | { | |
178 | spin_lock(&joydev->client_lock); | |
179 | list_add_tail_rcu(&client->node, &joydev->client_list); | |
180 | spin_unlock(&joydev->client_lock); | |
82ba56c2 | 181 | synchronize_rcu(); |
b126207c DT |
182 | } |
183 | ||
184 | static void joydev_detach_client(struct joydev *joydev, | |
185 | struct joydev_client *client) | |
186 | { | |
187 | spin_lock(&joydev->client_lock); | |
188 | list_del_rcu(&client->node); | |
189 | spin_unlock(&joydev->client_lock); | |
82ba56c2 | 190 | synchronize_rcu(); |
b126207c DT |
191 | } |
192 | ||
193 | static int joydev_open_device(struct joydev *joydev) | |
194 | { | |
195 | int retval; | |
196 | ||
197 | retval = mutex_lock_interruptible(&joydev->mutex); | |
198 | if (retval) | |
199 | return retval; | |
200 | ||
201 | if (!joydev->exist) | |
202 | retval = -ENODEV; | |
06445014 | 203 | else if (!joydev->open++) { |
b126207c | 204 | retval = input_open_device(&joydev->handle); |
06445014 ON |
205 | if (retval) |
206 | joydev->open--; | |
207 | } | |
b126207c DT |
208 | |
209 | mutex_unlock(&joydev->mutex); | |
210 | return retval; | |
211 | } | |
212 | ||
213 | static void joydev_close_device(struct joydev *joydev) | |
214 | { | |
215 | mutex_lock(&joydev->mutex); | |
216 | ||
217 | if (joydev->exist && !--joydev->open) | |
218 | input_close_device(&joydev->handle); | |
219 | ||
220 | mutex_unlock(&joydev->mutex); | |
221 | } | |
222 | ||
223 | /* | |
224 | * Wake up users waiting for IO so they can disconnect from | |
225 | * dead device. | |
226 | */ | |
227 | static void joydev_hangup(struct joydev *joydev) | |
228 | { | |
229 | struct joydev_client *client; | |
230 | ||
231 | spin_lock(&joydev->client_lock); | |
232 | list_for_each_entry(client, &joydev->client_list, node) | |
233 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
234 | spin_unlock(&joydev->client_lock); | |
235 | ||
236 | wake_up_interruptible(&joydev->wait); | |
237 | } | |
238 | ||
d0ffb9be | 239 | static int joydev_release(struct inode *inode, struct file *file) |
1da177e4 | 240 | { |
d0ffb9be DT |
241 | struct joydev_client *client = file->private_data; |
242 | struct joydev *joydev = client->joydev; | |
1da177e4 | 243 | |
b126207c | 244 | joydev_detach_client(joydev, client); |
d0ffb9be | 245 | kfree(client); |
1da177e4 | 246 | |
b126207c | 247 | joydev_close_device(joydev); |
9657d75c | 248 | put_device(&joydev->dev); |
1da177e4 | 249 | |
1da177e4 LT |
250 | return 0; |
251 | } | |
252 | ||
253 | static int joydev_open(struct inode *inode, struct file *file) | |
254 | { | |
d0ffb9be DT |
255 | struct joydev_client *client; |
256 | struct joydev *joydev; | |
1da177e4 | 257 | int i = iminor(inode) - JOYDEV_MINOR_BASE; |
d542ed82 | 258 | int error; |
1da177e4 | 259 | |
d0ffb9be DT |
260 | if (i >= JOYDEV_MINORS) |
261 | return -ENODEV; | |
1da177e4 | 262 | |
b126207c DT |
263 | error = mutex_lock_interruptible(&joydev_table_mutex); |
264 | if (error) | |
265 | return error; | |
d0ffb9be | 266 | joydev = joydev_table[i]; |
b126207c DT |
267 | if (joydev) |
268 | get_device(&joydev->dev); | |
269 | mutex_unlock(&joydev_table_mutex); | |
1da177e4 | 270 | |
b126207c DT |
271 | if (!joydev) |
272 | return -ENODEV; | |
9657d75c | 273 | |
d0ffb9be | 274 | client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL); |
9657d75c DT |
275 | if (!client) { |
276 | error = -ENOMEM; | |
277 | goto err_put_joydev; | |
278 | } | |
1da177e4 | 279 | |
b126207c | 280 | spin_lock_init(&client->buffer_lock); |
d0ffb9be | 281 | client->joydev = joydev; |
b126207c | 282 | joydev_attach_client(joydev, client); |
1da177e4 | 283 | |
b126207c DT |
284 | error = joydev_open_device(joydev); |
285 | if (error) | |
286 | goto err_free_client; | |
1da177e4 | 287 | |
d0ffb9be | 288 | file->private_data = client; |
3d7bbd45 DT |
289 | nonseekable_open(inode, file); |
290 | ||
1da177e4 | 291 | return 0; |
9657d75c DT |
292 | |
293 | err_free_client: | |
b126207c | 294 | joydev_detach_client(joydev, client); |
9657d75c DT |
295 | kfree(client); |
296 | err_put_joydev: | |
297 | put_device(&joydev->dev); | |
298 | return error; | |
1da177e4 LT |
299 | } |
300 | ||
b126207c DT |
301 | static int joydev_generate_startup_event(struct joydev_client *client, |
302 | struct input_dev *input, | |
303 | struct js_event *event) | |
1da177e4 | 304 | { |
b126207c DT |
305 | struct joydev *joydev = client->joydev; |
306 | int have_event; | |
307 | ||
308 | spin_lock_irq(&client->buffer_lock); | |
309 | ||
310 | have_event = client->startup < joydev->nabs + joydev->nkey; | |
311 | ||
312 | if (have_event) { | |
313 | ||
314 | event->time = jiffies_to_msecs(jiffies); | |
315 | if (client->startup < joydev->nkey) { | |
316 | event->type = JS_EVENT_BUTTON | JS_EVENT_INIT; | |
317 | event->number = client->startup; | |
318 | event->value = !!test_bit(joydev->keypam[event->number], | |
319 | input->key); | |
320 | } else { | |
321 | event->type = JS_EVENT_AXIS | JS_EVENT_INIT; | |
322 | event->number = client->startup - joydev->nkey; | |
323 | event->value = joydev->abs[event->number]; | |
324 | } | |
325 | client->startup++; | |
326 | } | |
327 | ||
328 | spin_unlock_irq(&client->buffer_lock); | |
329 | ||
330 | return have_event; | |
331 | } | |
332 | ||
333 | static int joydev_fetch_next_event(struct joydev_client *client, | |
334 | struct js_event *event) | |
335 | { | |
336 | int have_event; | |
337 | ||
338 | spin_lock_irq(&client->buffer_lock); | |
339 | ||
340 | have_event = client->head != client->tail; | |
341 | if (have_event) { | |
342 | *event = client->buffer[client->tail++]; | |
343 | client->tail &= JOYDEV_BUFFER_SIZE - 1; | |
344 | } | |
345 | ||
346 | spin_unlock_irq(&client->buffer_lock); | |
347 | ||
348 | return have_event; | |
349 | } | |
350 | ||
351 | /* | |
352 | * Old joystick interface | |
353 | */ | |
354 | static ssize_t joydev_0x_read(struct joydev_client *client, | |
355 | struct input_dev *input, | |
356 | char __user *buf) | |
357 | { | |
358 | struct joydev *joydev = client->joydev; | |
359 | struct JS_DATA_TYPE data; | |
360 | int i; | |
361 | ||
362 | spin_lock_irq(&input->event_lock); | |
363 | ||
364 | /* | |
365 | * Get device state | |
366 | */ | |
367 | for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++) | |
368 | data.buttons |= | |
369 | test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0; | |
370 | data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x; | |
371 | data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y; | |
372 | ||
373 | /* | |
374 | * Reset reader's event queue | |
375 | */ | |
376 | spin_lock(&client->buffer_lock); | |
377 | client->startup = 0; | |
378 | client->tail = client->head; | |
379 | spin_unlock(&client->buffer_lock); | |
380 | ||
381 | spin_unlock_irq(&input->event_lock); | |
382 | ||
383 | if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE))) | |
384 | return -EFAULT; | |
385 | ||
386 | return sizeof(struct JS_DATA_TYPE); | |
1da177e4 LT |
387 | } |
388 | ||
b126207c DT |
389 | static inline int joydev_data_pending(struct joydev_client *client) |
390 | { | |
391 | struct joydev *joydev = client->joydev; | |
392 | ||
393 | return client->startup < joydev->nabs + joydev->nkey || | |
394 | client->head != client->tail; | |
395 | } | |
396 | ||
397 | static ssize_t joydev_read(struct file *file, char __user *buf, | |
398 | size_t count, loff_t *ppos) | |
1da177e4 | 399 | { |
d0ffb9be DT |
400 | struct joydev_client *client = file->private_data; |
401 | struct joydev *joydev = client->joydev; | |
1da177e4 | 402 | struct input_dev *input = joydev->handle.dev; |
b126207c DT |
403 | struct js_event event; |
404 | int retval; | |
1da177e4 | 405 | |
d0ffb9be | 406 | if (!joydev->exist) |
1da177e4 LT |
407 | return -ENODEV; |
408 | ||
409 | if (count < sizeof(struct js_event)) | |
410 | return -EINVAL; | |
411 | ||
b126207c DT |
412 | if (count == sizeof(struct JS_DATA_TYPE)) |
413 | return joydev_0x_read(client, input, buf); | |
1da177e4 | 414 | |
b126207c | 415 | if (!joydev_data_pending(client) && (file->f_flags & O_NONBLOCK)) |
1e0afb28 | 416 | return -EAGAIN; |
1da177e4 | 417 | |
d0ffb9be | 418 | retval = wait_event_interruptible(joydev->wait, |
b126207c | 419 | !joydev->exist || joydev_data_pending(client)); |
1da177e4 LT |
420 | if (retval) |
421 | return retval; | |
422 | ||
d0ffb9be | 423 | if (!joydev->exist) |
1da177e4 LT |
424 | return -ENODEV; |
425 | ||
b126207c DT |
426 | while (retval + sizeof(struct js_event) <= count && |
427 | joydev_generate_startup_event(client, input, &event)) { | |
1da177e4 LT |
428 | |
429 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) | |
430 | return -EFAULT; | |
431 | ||
1da177e4 LT |
432 | retval += sizeof(struct js_event); |
433 | } | |
434 | ||
b126207c DT |
435 | while (retval + sizeof(struct js_event) <= count && |
436 | joydev_fetch_next_event(client, &event)) { | |
1da177e4 | 437 | |
b126207c | 438 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) |
1da177e4 LT |
439 | return -EFAULT; |
440 | ||
1da177e4 LT |
441 | retval += sizeof(struct js_event); |
442 | } | |
443 | ||
444 | return retval; | |
445 | } | |
446 | ||
447 | /* No kernel lock - fine */ | |
448 | static unsigned int joydev_poll(struct file *file, poll_table *wait) | |
449 | { | |
d0ffb9be DT |
450 | struct joydev_client *client = file->private_data; |
451 | struct joydev *joydev = client->joydev; | |
1e0afb28 | 452 | |
d0ffb9be | 453 | poll_wait(file, &joydev->wait, wait); |
b126207c DT |
454 | return (joydev_data_pending(client) ? (POLLIN | POLLRDNORM) : 0) | |
455 | (joydev->exist ? 0 : (POLLHUP | POLLERR)); | |
1da177e4 LT |
456 | } |
457 | ||
999b874f SK |
458 | static int joydev_handle_JSIOCSAXMAP(struct joydev *joydev, |
459 | void __user *argp, size_t len) | |
460 | { | |
461 | __u8 *abspam; | |
462 | int i; | |
463 | int retval = 0; | |
464 | ||
465 | len = min(len, sizeof(joydev->abspam)); | |
466 | ||
467 | /* Validate the map. */ | |
468 | abspam = kmalloc(len, GFP_KERNEL); | |
469 | if (!abspam) | |
470 | return -ENOMEM; | |
471 | ||
472 | if (copy_from_user(abspam, argp, len)) { | |
473 | retval = -EFAULT; | |
474 | goto out; | |
475 | } | |
476 | ||
477 | for (i = 0; i < joydev->nabs; i++) { | |
478 | if (abspam[i] > ABS_MAX) { | |
479 | retval = -EINVAL; | |
480 | goto out; | |
481 | } | |
482 | } | |
483 | ||
484 | memcpy(joydev->abspam, abspam, len); | |
485 | ||
d2520a42 KW |
486 | for (i = 0; i < joydev->nabs; i++) |
487 | joydev->absmap[joydev->abspam[i]] = i; | |
488 | ||
999b874f SK |
489 | out: |
490 | kfree(abspam); | |
491 | return retval; | |
492 | } | |
493 | ||
494 | static int joydev_handle_JSIOCSBTNMAP(struct joydev *joydev, | |
495 | void __user *argp, size_t len) | |
496 | { | |
497 | __u16 *keypam; | |
498 | int i; | |
499 | int retval = 0; | |
500 | ||
501 | len = min(len, sizeof(joydev->keypam)); | |
502 | ||
503 | /* Validate the map. */ | |
504 | keypam = kmalloc(len, GFP_KERNEL); | |
505 | if (!keypam) | |
506 | return -ENOMEM; | |
507 | ||
508 | if (copy_from_user(keypam, argp, len)) { | |
509 | retval = -EFAULT; | |
510 | goto out; | |
511 | } | |
512 | ||
513 | for (i = 0; i < joydev->nkey; i++) { | |
514 | if (keypam[i] > KEY_MAX || keypam[i] < BTN_MISC) { | |
515 | retval = -EINVAL; | |
516 | goto out; | |
517 | } | |
518 | } | |
519 | ||
520 | memcpy(joydev->keypam, keypam, len); | |
521 | ||
522 | for (i = 0; i < joydev->nkey; i++) | |
523 | joydev->keymap[keypam[i] - BTN_MISC] = i; | |
524 | ||
525 | out: | |
526 | kfree(keypam); | |
527 | return retval; | |
528 | } | |
529 | ||
530 | ||
b126207c DT |
531 | static int joydev_ioctl_common(struct joydev *joydev, |
532 | unsigned int cmd, void __user *argp) | |
1da177e4 | 533 | { |
1da177e4 | 534 | struct input_dev *dev = joydev->handle.dev; |
ec8b4b70 | 535 | size_t len; |
987a6c02 | 536 | int i; |
ec8b4b70 | 537 | const char *name; |
1da177e4 | 538 | |
ec8b4b70 | 539 | /* Process fixed-sized commands. */ |
1da177e4 LT |
540 | switch (cmd) { |
541 | ||
b126207c DT |
542 | case JS_SET_CAL: |
543 | return copy_from_user(&joydev->glue.JS_CORR, argp, | |
024ac44c | 544 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 545 | |
b126207c DT |
546 | case JS_GET_CAL: |
547 | return copy_to_user(argp, &joydev->glue.JS_CORR, | |
024ac44c | 548 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 549 | |
b126207c DT |
550 | case JS_SET_TIMEOUT: |
551 | return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1e0afb28 | 552 | |
b126207c DT |
553 | case JS_GET_TIMEOUT: |
554 | return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1da177e4 | 555 | |
b126207c DT |
556 | case JSIOCGVERSION: |
557 | return put_user(JS_VERSION, (__u32 __user *) argp); | |
1e0afb28 | 558 | |
b126207c DT |
559 | case JSIOCGAXES: |
560 | return put_user(joydev->nabs, (__u8 __user *) argp); | |
1e0afb28 | 561 | |
b126207c DT |
562 | case JSIOCGBUTTONS: |
563 | return put_user(joydev->nkey, (__u8 __user *) argp); | |
1e0afb28 | 564 | |
b126207c DT |
565 | case JSIOCSCORR: |
566 | if (copy_from_user(joydev->corr, argp, | |
567 | sizeof(joydev->corr[0]) * joydev->nabs)) | |
987a6c02 | 568 | return -EFAULT; |
1e0afb28 | 569 | |
b126207c | 570 | for (i = 0; i < joydev->nabs; i++) { |
987a6c02 DM |
571 | int val = input_abs_get_val(dev, joydev->abspam[i]); |
572 | joydev->abs[i] = joydev_correct(val, &joydev->corr[i]); | |
b126207c DT |
573 | } |
574 | return 0; | |
1e0afb28 | 575 | |
b126207c DT |
576 | case JSIOCGCORR: |
577 | return copy_to_user(argp, joydev->corr, | |
578 | sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0; | |
579 | ||
ec8b4b70 SK |
580 | } |
581 | ||
582 | /* | |
583 | * Process variable-sized commands (the axis and button map commands | |
584 | * are considered variable-sized to decouple them from the values of | |
585 | * ABS_MAX and KEY_MAX). | |
586 | */ | |
587 | switch (cmd & ~IOCSIZE_MASK) { | |
588 | ||
589 | case (JSIOCSAXMAP & ~IOCSIZE_MASK): | |
999b874f | 590 | return joydev_handle_JSIOCSAXMAP(joydev, argp, _IOC_SIZE(cmd)); |
b126207c | 591 | |
ec8b4b70 SK |
592 | case (JSIOCGAXMAP & ~IOCSIZE_MASK): |
593 | len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->abspam)); | |
999b874f | 594 | return copy_to_user(argp, joydev->abspam, len) ? -EFAULT : len; |
ec8b4b70 SK |
595 | |
596 | case (JSIOCSBTNMAP & ~IOCSIZE_MASK): | |
999b874f | 597 | return joydev_handle_JSIOCSBTNMAP(joydev, argp, _IOC_SIZE(cmd)); |
b126207c | 598 | |
ec8b4b70 SK |
599 | case (JSIOCGBTNMAP & ~IOCSIZE_MASK): |
600 | len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->keypam)); | |
999b874f | 601 | return copy_to_user(argp, joydev->keypam, len) ? -EFAULT : len; |
b126207c | 602 | |
ec8b4b70 SK |
603 | case JSIOCGNAME(0): |
604 | name = dev->name; | |
605 | if (!name) | |
606 | return 0; | |
607 | ||
608 | len = min_t(size_t, _IOC_SIZE(cmd), strlen(name) + 1); | |
609 | return copy_to_user(argp, name, len) ? -EFAULT : len; | |
1da177e4 | 610 | } |
ec8b4b70 | 611 | |
1da177e4 LT |
612 | return -EINVAL; |
613 | } | |
614 | ||
024ac44c | 615 | #ifdef CONFIG_COMPAT |
b126207c DT |
616 | static long joydev_compat_ioctl(struct file *file, |
617 | unsigned int cmd, unsigned long arg) | |
024ac44c | 618 | { |
d0ffb9be DT |
619 | struct joydev_client *client = file->private_data; |
620 | struct joydev *joydev = client->joydev; | |
024ac44c JF |
621 | void __user *argp = (void __user *)arg; |
622 | s32 tmp32; | |
623 | struct JS_DATA_SAVE_TYPE_32 ds32; | |
b126207c | 624 | int retval; |
024ac44c | 625 | |
b126207c DT |
626 | retval = mutex_lock_interruptible(&joydev->mutex); |
627 | if (retval) | |
628 | return retval; | |
629 | ||
630 | if (!joydev->exist) { | |
631 | retval = -ENODEV; | |
632 | goto out; | |
633 | } | |
634 | ||
635 | switch (cmd) { | |
1e0afb28 | 636 | |
024ac44c | 637 | case JS_SET_TIMELIMIT: |
b126207c DT |
638 | retval = get_user(tmp32, (s32 __user *) arg); |
639 | if (retval == 0) | |
024ac44c JF |
640 | joydev->glue.JS_TIMELIMIT = tmp32; |
641 | break; | |
b126207c | 642 | |
024ac44c JF |
643 | case JS_GET_TIMELIMIT: |
644 | tmp32 = joydev->glue.JS_TIMELIMIT; | |
b126207c | 645 | retval = put_user(tmp32, (s32 __user *) arg); |
024ac44c JF |
646 | break; |
647 | ||
648 | case JS_SET_ALL: | |
b126207c DT |
649 | retval = copy_from_user(&ds32, argp, |
650 | sizeof(ds32)) ? -EFAULT : 0; | |
651 | if (retval == 0) { | |
024ac44c JF |
652 | joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT; |
653 | joydev->glue.BUSY = ds32.BUSY; | |
654 | joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME; | |
655 | joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT; | |
656 | joydev->glue.JS_SAVE = ds32.JS_SAVE; | |
657 | joydev->glue.JS_CORR = ds32.JS_CORR; | |
658 | } | |
659 | break; | |
660 | ||
661 | case JS_GET_ALL: | |
662 | ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT; | |
663 | ds32.BUSY = joydev->glue.BUSY; | |
664 | ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME; | |
665 | ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT; | |
666 | ds32.JS_SAVE = joydev->glue.JS_SAVE; | |
667 | ds32.JS_CORR = joydev->glue.JS_CORR; | |
668 | ||
b126207c | 669 | retval = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0; |
024ac44c JF |
670 | break; |
671 | ||
672 | default: | |
b126207c DT |
673 | retval = joydev_ioctl_common(joydev, cmd, argp); |
674 | break; | |
024ac44c | 675 | } |
b126207c DT |
676 | |
677 | out: | |
678 | mutex_unlock(&joydev->mutex); | |
679 | return retval; | |
024ac44c JF |
680 | } |
681 | #endif /* CONFIG_COMPAT */ | |
682 | ||
b126207c DT |
683 | static long joydev_ioctl(struct file *file, |
684 | unsigned int cmd, unsigned long arg) | |
024ac44c | 685 | { |
d0ffb9be DT |
686 | struct joydev_client *client = file->private_data; |
687 | struct joydev *joydev = client->joydev; | |
024ac44c | 688 | void __user *argp = (void __user *)arg; |
b126207c | 689 | int retval; |
024ac44c | 690 | |
b126207c DT |
691 | retval = mutex_lock_interruptible(&joydev->mutex); |
692 | if (retval) | |
693 | return retval; | |
024ac44c | 694 | |
b126207c DT |
695 | if (!joydev->exist) { |
696 | retval = -ENODEV; | |
697 | goto out; | |
024ac44c | 698 | } |
b126207c DT |
699 | |
700 | switch (cmd) { | |
701 | ||
702 | case JS_SET_TIMELIMIT: | |
703 | retval = get_user(joydev->glue.JS_TIMELIMIT, | |
704 | (long __user *) arg); | |
705 | break; | |
706 | ||
707 | case JS_GET_TIMELIMIT: | |
708 | retval = put_user(joydev->glue.JS_TIMELIMIT, | |
709 | (long __user *) arg); | |
710 | break; | |
711 | ||
712 | case JS_SET_ALL: | |
713 | retval = copy_from_user(&joydev->glue, argp, | |
714 | sizeof(joydev->glue)) ? -EFAULT: 0; | |
715 | break; | |
716 | ||
717 | case JS_GET_ALL: | |
718 | retval = copy_to_user(argp, &joydev->glue, | |
719 | sizeof(joydev->glue)) ? -EFAULT : 0; | |
720 | break; | |
721 | ||
722 | default: | |
723 | retval = joydev_ioctl_common(joydev, cmd, argp); | |
724 | break; | |
725 | } | |
726 | out: | |
727 | mutex_unlock(&joydev->mutex); | |
728 | return retval; | |
024ac44c JF |
729 | } |
730 | ||
66e66118 | 731 | static const struct file_operations joydev_fops = { |
b126207c DT |
732 | .owner = THIS_MODULE, |
733 | .read = joydev_read, | |
734 | .poll = joydev_poll, | |
735 | .open = joydev_open, | |
736 | .release = joydev_release, | |
737 | .unlocked_ioctl = joydev_ioctl, | |
024ac44c | 738 | #ifdef CONFIG_COMPAT |
b126207c | 739 | .compat_ioctl = joydev_compat_ioctl, |
024ac44c | 740 | #endif |
b126207c | 741 | .fasync = joydev_fasync, |
6038f373 | 742 | .llseek = no_llseek, |
1da177e4 LT |
743 | }; |
744 | ||
b126207c DT |
745 | static int joydev_install_chrdev(struct joydev *joydev) |
746 | { | |
747 | joydev_table[joydev->minor] = joydev; | |
748 | return 0; | |
749 | } | |
750 | ||
751 | static void joydev_remove_chrdev(struct joydev *joydev) | |
752 | { | |
753 | mutex_lock(&joydev_table_mutex); | |
754 | joydev_table[joydev->minor] = NULL; | |
755 | mutex_unlock(&joydev_table_mutex); | |
756 | } | |
757 | ||
758 | /* | |
759 | * Mark device non-existant. This disables writes, ioctls and | |
760 | * prevents new users from opening the device. Already posted | |
761 | * blocking reads will stay, however new ones will fail. | |
762 | */ | |
763 | static void joydev_mark_dead(struct joydev *joydev) | |
764 | { | |
765 | mutex_lock(&joydev->mutex); | |
20da92de | 766 | joydev->exist = false; |
b126207c DT |
767 | mutex_unlock(&joydev->mutex); |
768 | } | |
769 | ||
770 | static void joydev_cleanup(struct joydev *joydev) | |
771 | { | |
772 | struct input_handle *handle = &joydev->handle; | |
773 | ||
774 | joydev_mark_dead(joydev); | |
775 | joydev_hangup(joydev); | |
776 | joydev_remove_chrdev(joydev); | |
777 | ||
778 | /* joydev is marked dead so noone else accesses joydev->open */ | |
779 | if (joydev->open) | |
780 | input_close_device(handle); | |
781 | } | |
782 | ||
0b7024ac DT |
783 | |
784 | static bool joydev_match(struct input_handler *handler, struct input_dev *dev) | |
785 | { | |
786 | /* Avoid touchpads and touchscreens */ | |
787 | if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_TOUCH, dev->keybit)) | |
788 | return false; | |
789 | ||
790 | /* Avoid tablets, digitisers and similar devices */ | |
791 | if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_DIGI, dev->keybit)) | |
792 | return false; | |
793 | ||
794 | return true; | |
795 | } | |
796 | ||
5b2a0826 DT |
797 | static int joydev_connect(struct input_handler *handler, struct input_dev *dev, |
798 | const struct input_device_id *id) | |
1da177e4 LT |
799 | { |
800 | struct joydev *joydev; | |
801 | int i, j, t, minor; | |
5b2a0826 | 802 | int error; |
1da177e4 | 803 | |
b126207c DT |
804 | for (minor = 0; minor < JOYDEV_MINORS; minor++) |
805 | if (!joydev_table[minor]) | |
806 | break; | |
807 | ||
1da177e4 LT |
808 | if (minor == JOYDEV_MINORS) { |
809 | printk(KERN_ERR "joydev: no more free joydev devices\n"); | |
5b2a0826 | 810 | return -ENFILE; |
1da177e4 LT |
811 | } |
812 | ||
5b2a0826 DT |
813 | joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL); |
814 | if (!joydev) | |
815 | return -ENOMEM; | |
1da177e4 | 816 | |
d0ffb9be | 817 | INIT_LIST_HEAD(&joydev->client_list); |
b126207c DT |
818 | spin_lock_init(&joydev->client_lock); |
819 | mutex_init(&joydev->mutex); | |
1da177e4 LT |
820 | init_waitqueue_head(&joydev->wait); |
821 | ||
3d5cb60e | 822 | dev_set_name(&joydev->dev, "js%d", minor); |
20da92de | 823 | joydev->exist = true; |
1da177e4 | 824 | joydev->minor = minor; |
b126207c | 825 | |
a7097ff8 | 826 | joydev->handle.dev = input_get_device(dev); |
3d5cb60e | 827 | joydev->handle.name = dev_name(&joydev->dev); |
1da177e4 LT |
828 | joydev->handle.handler = handler; |
829 | joydev->handle.private = joydev; | |
1da177e4 | 830 | |
81c2a3ba | 831 | for (i = 0; i < ABS_CNT; i++) |
1da177e4 LT |
832 | if (test_bit(i, dev->absbit)) { |
833 | joydev->absmap[i] = joydev->nabs; | |
834 | joydev->abspam[joydev->nabs] = i; | |
835 | joydev->nabs++; | |
836 | } | |
837 | ||
838 | for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++) | |
839 | if (test_bit(i + BTN_MISC, dev->keybit)) { | |
840 | joydev->keymap[i] = joydev->nkey; | |
841 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
842 | joydev->nkey++; | |
843 | } | |
844 | ||
f24949e8 | 845 | for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++) |
1da177e4 LT |
846 | if (test_bit(i + BTN_MISC, dev->keybit)) { |
847 | joydev->keymap[i] = joydev->nkey; | |
848 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
849 | joydev->nkey++; | |
850 | } | |
851 | ||
852 | for (i = 0; i < joydev->nabs; i++) { | |
853 | j = joydev->abspam[i]; | |
987a6c02 | 854 | if (input_abs_get_max(dev, j) == input_abs_get_min(dev, j)) { |
1da177e4 | 855 | joydev->corr[i].type = JS_CORR_NONE; |
987a6c02 | 856 | joydev->abs[i] = input_abs_get_val(dev, j); |
1da177e4 LT |
857 | continue; |
858 | } | |
859 | joydev->corr[i].type = JS_CORR_BROKEN; | |
987a6c02 DM |
860 | joydev->corr[i].prec = input_abs_get_fuzz(dev, j); |
861 | ||
862 | t = (input_abs_get_max(dev, j) + input_abs_get_min(dev, j)) / 2; | |
863 | joydev->corr[i].coef[0] = t - input_abs_get_flat(dev, j); | |
864 | joydev->corr[i].coef[1] = t + input_abs_get_flat(dev, j); | |
b126207c | 865 | |
987a6c02 DM |
866 | t = (input_abs_get_max(dev, j) - input_abs_get_min(dev, j)) / 2 |
867 | - 2 * input_abs_get_flat(dev, j); | |
b126207c DT |
868 | if (t) { |
869 | joydev->corr[i].coef[2] = (1 << 29) / t; | |
870 | joydev->corr[i].coef[3] = (1 << 29) / t; | |
871 | ||
987a6c02 DM |
872 | joydev->abs[i] = |
873 | joydev_correct(input_abs_get_val(dev, j), | |
874 | joydev->corr + i); | |
b126207c | 875 | } |
1da177e4 LT |
876 | } |
877 | ||
b126207c | 878 | joydev->dev.devt = MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor); |
9657d75c DT |
879 | joydev->dev.class = &input_class; |
880 | joydev->dev.parent = &dev->dev; | |
9657d75c DT |
881 | joydev->dev.release = joydev_free; |
882 | device_initialize(&joydev->dev); | |
5b2a0826 | 883 | |
b126207c | 884 | error = input_register_handle(&joydev->handle); |
5b2a0826 | 885 | if (error) |
9657d75c | 886 | goto err_free_joydev; |
5b2a0826 | 887 | |
b126207c | 888 | error = joydev_install_chrdev(joydev); |
5b2a0826 | 889 | if (error) |
b126207c DT |
890 | goto err_unregister_handle; |
891 | ||
892 | error = device_add(&joydev->dev); | |
893 | if (error) | |
894 | goto err_cleanup_joydev; | |
5b2a0826 DT |
895 | |
896 | return 0; | |
1da177e4 | 897 | |
b126207c DT |
898 | err_cleanup_joydev: |
899 | joydev_cleanup(joydev); | |
900 | err_unregister_handle: | |
901 | input_unregister_handle(&joydev->handle); | |
5b2a0826 | 902 | err_free_joydev: |
9657d75c | 903 | put_device(&joydev->dev); |
5b2a0826 | 904 | return error; |
1da177e4 LT |
905 | } |
906 | ||
907 | static void joydev_disconnect(struct input_handle *handle) | |
908 | { | |
909 | struct joydev *joydev = handle->private; | |
1da177e4 | 910 | |
9657d75c | 911 | device_del(&joydev->dev); |
b126207c DT |
912 | joydev_cleanup(joydev); |
913 | input_unregister_handle(handle); | |
9657d75c | 914 | put_device(&joydev->dev); |
1da177e4 LT |
915 | } |
916 | ||
66e66118 | 917 | static const struct input_device_id joydev_ids[] = { |
1da177e4 | 918 | { |
b126207c DT |
919 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
920 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
921 | .evbit = { BIT_MASK(EV_ABS) }, |
922 | .absbit = { BIT_MASK(ABS_X) }, | |
1da177e4 LT |
923 | }, |
924 | { | |
b126207c DT |
925 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
926 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
927 | .evbit = { BIT_MASK(EV_ABS) }, |
928 | .absbit = { BIT_MASK(ABS_WHEEL) }, | |
1da177e4 LT |
929 | }, |
930 | { | |
b126207c DT |
931 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
932 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
933 | .evbit = { BIT_MASK(EV_ABS) }, |
934 | .absbit = { BIT_MASK(ABS_THROTTLE) }, | |
1da177e4 | 935 | }, |
26a6931b CF |
936 | { |
937 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
938 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
939 | .evbit = { BIT_MASK(EV_KEY) }, | |
940 | .keybit = {[BIT_WORD(BTN_JOYSTICK)] = BIT_MASK(BTN_JOYSTICK) }, | |
941 | }, | |
942 | { | |
943 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
944 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
945 | .evbit = { BIT_MASK(EV_KEY) }, | |
946 | .keybit = { [BIT_WORD(BTN_GAMEPAD)] = BIT_MASK(BTN_GAMEPAD) }, | |
947 | }, | |
948 | { | |
949 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
950 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
951 | .evbit = { BIT_MASK(EV_KEY) }, | |
952 | .keybit = { [BIT_WORD(BTN_TRIGGER_HAPPY)] = BIT_MASK(BTN_TRIGGER_HAPPY) }, | |
953 | }, | |
1e0afb28 | 954 | { } /* Terminating entry */ |
1da177e4 LT |
955 | }; |
956 | ||
957 | MODULE_DEVICE_TABLE(input, joydev_ids); | |
958 | ||
959 | static struct input_handler joydev_handler = { | |
b126207c | 960 | .event = joydev_event, |
0b7024ac | 961 | .match = joydev_match, |
b126207c DT |
962 | .connect = joydev_connect, |
963 | .disconnect = joydev_disconnect, | |
964 | .fops = &joydev_fops, | |
965 | .minor = JOYDEV_MINOR_BASE, | |
966 | .name = "joydev", | |
967 | .id_table = joydev_ids, | |
1da177e4 LT |
968 | }; |
969 | ||
970 | static int __init joydev_init(void) | |
971 | { | |
4263cf0f | 972 | return input_register_handler(&joydev_handler); |
1da177e4 LT |
973 | } |
974 | ||
975 | static void __exit joydev_exit(void) | |
976 | { | |
977 | input_unregister_handler(&joydev_handler); | |
978 | } | |
979 | ||
980 | module_init(joydev_init); | |
981 | module_exit(joydev_exit); |