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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; | |
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 DT |
47 | struct device dev; |
48 | ||
1da177e4 LT |
49 | struct js_corr corr[ABS_MAX + 1]; |
50 | struct JS_DATA_SAVE_TYPE glue; | |
51 | int nabs; | |
52 | int nkey; | |
53 | __u16 keymap[KEY_MAX - BTN_MISC + 1]; | |
54 | __u16 keypam[KEY_MAX - BTN_MISC + 1]; | |
55 | __u8 absmap[ABS_MAX + 1]; | |
56 | __u8 abspam[ABS_MAX + 1]; | |
57 | __s16 abs[ABS_MAX + 1]; | |
58 | }; | |
59 | ||
d0ffb9be | 60 | struct joydev_client { |
1da177e4 LT |
61 | struct js_event buffer[JOYDEV_BUFFER_SIZE]; |
62 | int head; | |
63 | int tail; | |
64 | int startup; | |
b126207c | 65 | spinlock_t buffer_lock; /* protects access to buffer, head and tail */ |
1da177e4 LT |
66 | struct fasync_struct *fasync; |
67 | struct joydev *joydev; | |
68 | struct list_head node; | |
69 | }; | |
70 | ||
71 | static struct joydev *joydev_table[JOYDEV_MINORS]; | |
b126207c | 72 | static DEFINE_MUTEX(joydev_table_mutex); |
1da177e4 LT |
73 | |
74 | static int joydev_correct(int value, struct js_corr *corr) | |
75 | { | |
76 | switch (corr->type) { | |
b126207c DT |
77 | |
78 | case JS_CORR_NONE: | |
79 | break; | |
80 | ||
81 | case JS_CORR_BROKEN: | |
82 | value = value > corr->coef[0] ? (value < corr->coef[1] ? 0 : | |
83 | ((corr->coef[3] * (value - corr->coef[1])) >> 14)) : | |
84 | ((corr->coef[2] * (value - corr->coef[0])) >> 14); | |
85 | break; | |
86 | ||
87 | default: | |
88 | return 0; | |
1da177e4 LT |
89 | } |
90 | ||
1e0afb28 | 91 | return value < -32767 ? -32767 : (value > 32767 ? 32767 : value); |
1da177e4 LT |
92 | } |
93 | ||
b126207c DT |
94 | static void joydev_pass_event(struct joydev_client *client, |
95 | struct js_event *event) | |
96 | { | |
97 | struct joydev *joydev = client->joydev; | |
98 | ||
99 | /* | |
100 | * IRQs already disabled, just acquire the lock | |
101 | */ | |
102 | spin_lock(&client->buffer_lock); | |
103 | ||
104 | client->buffer[client->head] = *event; | |
105 | ||
106 | if (client->startup == joydev->nabs + joydev->nkey) { | |
107 | client->head++; | |
108 | client->head &= JOYDEV_BUFFER_SIZE - 1; | |
109 | if (client->tail == client->head) | |
110 | client->startup = 0; | |
111 | } | |
112 | ||
113 | spin_unlock(&client->buffer_lock); | |
114 | ||
115 | kill_fasync(&client->fasync, SIGIO, POLL_IN); | |
116 | } | |
117 | ||
118 | static void joydev_event(struct input_handle *handle, | |
119 | unsigned int type, unsigned int code, int value) | |
1da177e4 LT |
120 | { |
121 | struct joydev *joydev = handle->private; | |
d0ffb9be | 122 | struct joydev_client *client; |
1da177e4 LT |
123 | struct js_event event; |
124 | ||
125 | switch (type) { | |
126 | ||
b126207c DT |
127 | case EV_KEY: |
128 | if (code < BTN_MISC || value == 2) | |
129 | return; | |
130 | event.type = JS_EVENT_BUTTON; | |
131 | event.number = joydev->keymap[code - BTN_MISC]; | |
132 | event.value = value; | |
133 | break; | |
1da177e4 | 134 | |
b126207c DT |
135 | case EV_ABS: |
136 | event.type = JS_EVENT_AXIS; | |
137 | event.number = joydev->absmap[code]; | |
138 | event.value = joydev_correct(value, | |
139 | &joydev->corr[event.number]); | |
140 | if (event.value == joydev->abs[event.number]) | |
1da177e4 | 141 | return; |
b126207c DT |
142 | joydev->abs[event.number] = event.value; |
143 | break; | |
144 | ||
145 | default: | |
146 | return; | |
1da177e4 LT |
147 | } |
148 | ||
6f5eacfc | 149 | event.time = jiffies_to_msecs(jiffies); |
1da177e4 | 150 | |
82ba56c2 | 151 | rcu_read_lock(); |
b126207c DT |
152 | list_for_each_entry_rcu(client, &joydev->client_list, node) |
153 | joydev_pass_event(client, &event); | |
82ba56c2 | 154 | rcu_read_unlock(); |
1da177e4 LT |
155 | |
156 | wake_up_interruptible(&joydev->wait); | |
157 | } | |
158 | ||
159 | static int joydev_fasync(int fd, struct file *file, int on) | |
160 | { | |
d0ffb9be | 161 | struct joydev_client *client = file->private_data; |
1e0afb28 | 162 | |
60aa4924 | 163 | return fasync_helper(fd, file, on, &client->fasync); |
1da177e4 LT |
164 | } |
165 | ||
9657d75c | 166 | static void joydev_free(struct device *dev) |
1da177e4 | 167 | { |
9657d75c DT |
168 | struct joydev *joydev = container_of(dev, struct joydev, dev); |
169 | ||
a7097ff8 | 170 | input_put_device(joydev->handle.dev); |
1da177e4 LT |
171 | kfree(joydev); |
172 | } | |
173 | ||
b126207c DT |
174 | static void joydev_attach_client(struct joydev *joydev, |
175 | struct joydev_client *client) | |
176 | { | |
177 | spin_lock(&joydev->client_lock); | |
178 | list_add_tail_rcu(&client->node, &joydev->client_list); | |
179 | spin_unlock(&joydev->client_lock); | |
82ba56c2 | 180 | synchronize_rcu(); |
b126207c DT |
181 | } |
182 | ||
183 | static void joydev_detach_client(struct joydev *joydev, | |
184 | struct joydev_client *client) | |
185 | { | |
186 | spin_lock(&joydev->client_lock); | |
187 | list_del_rcu(&client->node); | |
188 | spin_unlock(&joydev->client_lock); | |
82ba56c2 | 189 | synchronize_rcu(); |
b126207c DT |
190 | } |
191 | ||
192 | static int joydev_open_device(struct joydev *joydev) | |
193 | { | |
194 | int retval; | |
195 | ||
196 | retval = mutex_lock_interruptible(&joydev->mutex); | |
197 | if (retval) | |
198 | return retval; | |
199 | ||
200 | if (!joydev->exist) | |
201 | retval = -ENODEV; | |
06445014 | 202 | else if (!joydev->open++) { |
b126207c | 203 | retval = input_open_device(&joydev->handle); |
06445014 ON |
204 | if (retval) |
205 | joydev->open--; | |
206 | } | |
b126207c DT |
207 | |
208 | mutex_unlock(&joydev->mutex); | |
209 | return retval; | |
210 | } | |
211 | ||
212 | static void joydev_close_device(struct joydev *joydev) | |
213 | { | |
214 | mutex_lock(&joydev->mutex); | |
215 | ||
216 | if (joydev->exist && !--joydev->open) | |
217 | input_close_device(&joydev->handle); | |
218 | ||
219 | mutex_unlock(&joydev->mutex); | |
220 | } | |
221 | ||
222 | /* | |
223 | * Wake up users waiting for IO so they can disconnect from | |
224 | * dead device. | |
225 | */ | |
226 | static void joydev_hangup(struct joydev *joydev) | |
227 | { | |
228 | struct joydev_client *client; | |
229 | ||
230 | spin_lock(&joydev->client_lock); | |
231 | list_for_each_entry(client, &joydev->client_list, node) | |
232 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
233 | spin_unlock(&joydev->client_lock); | |
234 | ||
235 | wake_up_interruptible(&joydev->wait); | |
236 | } | |
237 | ||
d0ffb9be | 238 | static int joydev_release(struct inode *inode, struct file *file) |
1da177e4 | 239 | { |
d0ffb9be DT |
240 | struct joydev_client *client = file->private_data; |
241 | struct joydev *joydev = client->joydev; | |
1da177e4 | 242 | |
b126207c | 243 | joydev_detach_client(joydev, client); |
d0ffb9be | 244 | kfree(client); |
1da177e4 | 245 | |
b126207c | 246 | joydev_close_device(joydev); |
9657d75c | 247 | put_device(&joydev->dev); |
1da177e4 | 248 | |
1da177e4 LT |
249 | return 0; |
250 | } | |
251 | ||
252 | static int joydev_open(struct inode *inode, struct file *file) | |
253 | { | |
d0ffb9be DT |
254 | struct joydev_client *client; |
255 | struct joydev *joydev; | |
1da177e4 | 256 | int i = iminor(inode) - JOYDEV_MINOR_BASE; |
d542ed82 | 257 | int error; |
1da177e4 | 258 | |
d0ffb9be DT |
259 | if (i >= JOYDEV_MINORS) |
260 | return -ENODEV; | |
1da177e4 | 261 | |
b126207c DT |
262 | error = mutex_lock_interruptible(&joydev_table_mutex); |
263 | if (error) | |
264 | return error; | |
d0ffb9be | 265 | joydev = joydev_table[i]; |
b126207c DT |
266 | if (joydev) |
267 | get_device(&joydev->dev); | |
268 | mutex_unlock(&joydev_table_mutex); | |
1da177e4 | 269 | |
b126207c DT |
270 | if (!joydev) |
271 | return -ENODEV; | |
9657d75c | 272 | |
d0ffb9be | 273 | client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL); |
9657d75c DT |
274 | if (!client) { |
275 | error = -ENOMEM; | |
276 | goto err_put_joydev; | |
277 | } | |
1da177e4 | 278 | |
b126207c | 279 | spin_lock_init(&client->buffer_lock); |
d0ffb9be | 280 | client->joydev = joydev; |
b126207c | 281 | joydev_attach_client(joydev, client); |
1da177e4 | 282 | |
b126207c DT |
283 | error = joydev_open_device(joydev); |
284 | if (error) | |
285 | goto err_free_client; | |
1da177e4 | 286 | |
d0ffb9be | 287 | file->private_data = client; |
1da177e4 | 288 | return 0; |
9657d75c DT |
289 | |
290 | err_free_client: | |
b126207c | 291 | joydev_detach_client(joydev, client); |
9657d75c DT |
292 | kfree(client); |
293 | err_put_joydev: | |
294 | put_device(&joydev->dev); | |
295 | return error; | |
1da177e4 LT |
296 | } |
297 | ||
b126207c DT |
298 | static int joydev_generate_startup_event(struct joydev_client *client, |
299 | struct input_dev *input, | |
300 | struct js_event *event) | |
1da177e4 | 301 | { |
b126207c DT |
302 | struct joydev *joydev = client->joydev; |
303 | int have_event; | |
304 | ||
305 | spin_lock_irq(&client->buffer_lock); | |
306 | ||
307 | have_event = client->startup < joydev->nabs + joydev->nkey; | |
308 | ||
309 | if (have_event) { | |
310 | ||
311 | event->time = jiffies_to_msecs(jiffies); | |
312 | if (client->startup < joydev->nkey) { | |
313 | event->type = JS_EVENT_BUTTON | JS_EVENT_INIT; | |
314 | event->number = client->startup; | |
315 | event->value = !!test_bit(joydev->keypam[event->number], | |
316 | input->key); | |
317 | } else { | |
318 | event->type = JS_EVENT_AXIS | JS_EVENT_INIT; | |
319 | event->number = client->startup - joydev->nkey; | |
320 | event->value = joydev->abs[event->number]; | |
321 | } | |
322 | client->startup++; | |
323 | } | |
324 | ||
325 | spin_unlock_irq(&client->buffer_lock); | |
326 | ||
327 | return have_event; | |
328 | } | |
329 | ||
330 | static int joydev_fetch_next_event(struct joydev_client *client, | |
331 | struct js_event *event) | |
332 | { | |
333 | int have_event; | |
334 | ||
335 | spin_lock_irq(&client->buffer_lock); | |
336 | ||
337 | have_event = client->head != client->tail; | |
338 | if (have_event) { | |
339 | *event = client->buffer[client->tail++]; | |
340 | client->tail &= JOYDEV_BUFFER_SIZE - 1; | |
341 | } | |
342 | ||
343 | spin_unlock_irq(&client->buffer_lock); | |
344 | ||
345 | return have_event; | |
346 | } | |
347 | ||
348 | /* | |
349 | * Old joystick interface | |
350 | */ | |
351 | static ssize_t joydev_0x_read(struct joydev_client *client, | |
352 | struct input_dev *input, | |
353 | char __user *buf) | |
354 | { | |
355 | struct joydev *joydev = client->joydev; | |
356 | struct JS_DATA_TYPE data; | |
357 | int i; | |
358 | ||
359 | spin_lock_irq(&input->event_lock); | |
360 | ||
361 | /* | |
362 | * Get device state | |
363 | */ | |
364 | for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++) | |
365 | data.buttons |= | |
366 | test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0; | |
367 | data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x; | |
368 | data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y; | |
369 | ||
370 | /* | |
371 | * Reset reader's event queue | |
372 | */ | |
373 | spin_lock(&client->buffer_lock); | |
374 | client->startup = 0; | |
375 | client->tail = client->head; | |
376 | spin_unlock(&client->buffer_lock); | |
377 | ||
378 | spin_unlock_irq(&input->event_lock); | |
379 | ||
380 | if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE))) | |
381 | return -EFAULT; | |
382 | ||
383 | return sizeof(struct JS_DATA_TYPE); | |
1da177e4 LT |
384 | } |
385 | ||
b126207c DT |
386 | static inline int joydev_data_pending(struct joydev_client *client) |
387 | { | |
388 | struct joydev *joydev = client->joydev; | |
389 | ||
390 | return client->startup < joydev->nabs + joydev->nkey || | |
391 | client->head != client->tail; | |
392 | } | |
393 | ||
394 | static ssize_t joydev_read(struct file *file, char __user *buf, | |
395 | size_t count, loff_t *ppos) | |
1da177e4 | 396 | { |
d0ffb9be DT |
397 | struct joydev_client *client = file->private_data; |
398 | struct joydev *joydev = client->joydev; | |
1da177e4 | 399 | struct input_dev *input = joydev->handle.dev; |
b126207c DT |
400 | struct js_event event; |
401 | int retval; | |
1da177e4 | 402 | |
d0ffb9be | 403 | if (!joydev->exist) |
1da177e4 LT |
404 | return -ENODEV; |
405 | ||
406 | if (count < sizeof(struct js_event)) | |
407 | return -EINVAL; | |
408 | ||
b126207c DT |
409 | if (count == sizeof(struct JS_DATA_TYPE)) |
410 | return joydev_0x_read(client, input, buf); | |
1da177e4 | 411 | |
b126207c | 412 | if (!joydev_data_pending(client) && (file->f_flags & O_NONBLOCK)) |
1e0afb28 | 413 | return -EAGAIN; |
1da177e4 | 414 | |
d0ffb9be | 415 | retval = wait_event_interruptible(joydev->wait, |
b126207c | 416 | !joydev->exist || joydev_data_pending(client)); |
1da177e4 LT |
417 | if (retval) |
418 | return retval; | |
419 | ||
d0ffb9be | 420 | if (!joydev->exist) |
1da177e4 LT |
421 | return -ENODEV; |
422 | ||
b126207c DT |
423 | while (retval + sizeof(struct js_event) <= count && |
424 | joydev_generate_startup_event(client, input, &event)) { | |
1da177e4 LT |
425 | |
426 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) | |
427 | return -EFAULT; | |
428 | ||
1da177e4 LT |
429 | retval += sizeof(struct js_event); |
430 | } | |
431 | ||
b126207c DT |
432 | while (retval + sizeof(struct js_event) <= count && |
433 | joydev_fetch_next_event(client, &event)) { | |
1da177e4 | 434 | |
b126207c | 435 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) |
1da177e4 LT |
436 | return -EFAULT; |
437 | ||
1da177e4 LT |
438 | retval += sizeof(struct js_event); |
439 | } | |
440 | ||
441 | return retval; | |
442 | } | |
443 | ||
444 | /* No kernel lock - fine */ | |
445 | static unsigned int joydev_poll(struct file *file, poll_table *wait) | |
446 | { | |
d0ffb9be DT |
447 | struct joydev_client *client = file->private_data; |
448 | struct joydev *joydev = client->joydev; | |
1e0afb28 | 449 | |
d0ffb9be | 450 | poll_wait(file, &joydev->wait, wait); |
b126207c DT |
451 | return (joydev_data_pending(client) ? (POLLIN | POLLRDNORM) : 0) | |
452 | (joydev->exist ? 0 : (POLLHUP | POLLERR)); | |
1da177e4 LT |
453 | } |
454 | ||
999b874f SK |
455 | static int joydev_handle_JSIOCSAXMAP(struct joydev *joydev, |
456 | void __user *argp, size_t len) | |
457 | { | |
458 | __u8 *abspam; | |
459 | int i; | |
460 | int retval = 0; | |
461 | ||
462 | len = min(len, sizeof(joydev->abspam)); | |
463 | ||
464 | /* Validate the map. */ | |
465 | abspam = kmalloc(len, GFP_KERNEL); | |
466 | if (!abspam) | |
467 | return -ENOMEM; | |
468 | ||
469 | if (copy_from_user(abspam, argp, len)) { | |
470 | retval = -EFAULT; | |
471 | goto out; | |
472 | } | |
473 | ||
474 | for (i = 0; i < joydev->nabs; i++) { | |
475 | if (abspam[i] > ABS_MAX) { | |
476 | retval = -EINVAL; | |
477 | goto out; | |
478 | } | |
479 | } | |
480 | ||
481 | memcpy(joydev->abspam, abspam, len); | |
482 | ||
483 | out: | |
484 | kfree(abspam); | |
485 | return retval; | |
486 | } | |
487 | ||
488 | static int joydev_handle_JSIOCSBTNMAP(struct joydev *joydev, | |
489 | void __user *argp, size_t len) | |
490 | { | |
491 | __u16 *keypam; | |
492 | int i; | |
493 | int retval = 0; | |
494 | ||
495 | len = min(len, sizeof(joydev->keypam)); | |
496 | ||
497 | /* Validate the map. */ | |
498 | keypam = kmalloc(len, GFP_KERNEL); | |
499 | if (!keypam) | |
500 | return -ENOMEM; | |
501 | ||
502 | if (copy_from_user(keypam, argp, len)) { | |
503 | retval = -EFAULT; | |
504 | goto out; | |
505 | } | |
506 | ||
507 | for (i = 0; i < joydev->nkey; i++) { | |
508 | if (keypam[i] > KEY_MAX || keypam[i] < BTN_MISC) { | |
509 | retval = -EINVAL; | |
510 | goto out; | |
511 | } | |
512 | } | |
513 | ||
514 | memcpy(joydev->keypam, keypam, len); | |
515 | ||
516 | for (i = 0; i < joydev->nkey; i++) | |
517 | joydev->keymap[keypam[i] - BTN_MISC] = i; | |
518 | ||
519 | out: | |
520 | kfree(keypam); | |
521 | return retval; | |
522 | } | |
523 | ||
524 | ||
b126207c DT |
525 | static int joydev_ioctl_common(struct joydev *joydev, |
526 | unsigned int cmd, void __user *argp) | |
1da177e4 | 527 | { |
1da177e4 | 528 | struct input_dev *dev = joydev->handle.dev; |
ec8b4b70 | 529 | size_t len; |
1da177e4 | 530 | int i, j; |
ec8b4b70 | 531 | const char *name; |
1da177e4 | 532 | |
ec8b4b70 | 533 | /* Process fixed-sized commands. */ |
1da177e4 LT |
534 | switch (cmd) { |
535 | ||
b126207c DT |
536 | case JS_SET_CAL: |
537 | return copy_from_user(&joydev->glue.JS_CORR, argp, | |
024ac44c | 538 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 539 | |
b126207c DT |
540 | case JS_GET_CAL: |
541 | return copy_to_user(argp, &joydev->glue.JS_CORR, | |
024ac44c | 542 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 543 | |
b126207c DT |
544 | case JS_SET_TIMEOUT: |
545 | return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1e0afb28 | 546 | |
b126207c DT |
547 | case JS_GET_TIMEOUT: |
548 | return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1da177e4 | 549 | |
b126207c DT |
550 | case JSIOCGVERSION: |
551 | return put_user(JS_VERSION, (__u32 __user *) argp); | |
1e0afb28 | 552 | |
b126207c DT |
553 | case JSIOCGAXES: |
554 | return put_user(joydev->nabs, (__u8 __user *) argp); | |
1e0afb28 | 555 | |
b126207c DT |
556 | case JSIOCGBUTTONS: |
557 | return put_user(joydev->nkey, (__u8 __user *) argp); | |
1e0afb28 | 558 | |
b126207c DT |
559 | case JSIOCSCORR: |
560 | if (copy_from_user(joydev->corr, argp, | |
561 | sizeof(joydev->corr[0]) * joydev->nabs)) | |
562 | return -EFAULT; | |
1e0afb28 | 563 | |
b126207c DT |
564 | for (i = 0; i < joydev->nabs; i++) { |
565 | j = joydev->abspam[i]; | |
566 | joydev->abs[i] = joydev_correct(dev->abs[j], | |
567 | &joydev->corr[i]); | |
568 | } | |
569 | return 0; | |
1e0afb28 | 570 | |
b126207c DT |
571 | case JSIOCGCORR: |
572 | return copy_to_user(argp, joydev->corr, | |
573 | sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0; | |
574 | ||
ec8b4b70 SK |
575 | } |
576 | ||
577 | /* | |
578 | * Process variable-sized commands (the axis and button map commands | |
579 | * are considered variable-sized to decouple them from the values of | |
580 | * ABS_MAX and KEY_MAX). | |
581 | */ | |
582 | switch (cmd & ~IOCSIZE_MASK) { | |
583 | ||
584 | case (JSIOCSAXMAP & ~IOCSIZE_MASK): | |
999b874f | 585 | return joydev_handle_JSIOCSAXMAP(joydev, argp, _IOC_SIZE(cmd)); |
b126207c | 586 | |
ec8b4b70 SK |
587 | case (JSIOCGAXMAP & ~IOCSIZE_MASK): |
588 | len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->abspam)); | |
999b874f | 589 | return copy_to_user(argp, joydev->abspam, len) ? -EFAULT : len; |
ec8b4b70 SK |
590 | |
591 | case (JSIOCSBTNMAP & ~IOCSIZE_MASK): | |
999b874f | 592 | return joydev_handle_JSIOCSBTNMAP(joydev, argp, _IOC_SIZE(cmd)); |
b126207c | 593 | |
ec8b4b70 SK |
594 | case (JSIOCGBTNMAP & ~IOCSIZE_MASK): |
595 | len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->keypam)); | |
999b874f | 596 | return copy_to_user(argp, joydev->keypam, len) ? -EFAULT : len; |
b126207c | 597 | |
ec8b4b70 SK |
598 | case JSIOCGNAME(0): |
599 | name = dev->name; | |
600 | if (!name) | |
601 | return 0; | |
602 | ||
603 | len = min_t(size_t, _IOC_SIZE(cmd), strlen(name) + 1); | |
604 | return copy_to_user(argp, name, len) ? -EFAULT : len; | |
1da177e4 | 605 | } |
ec8b4b70 | 606 | |
1da177e4 LT |
607 | return -EINVAL; |
608 | } | |
609 | ||
024ac44c | 610 | #ifdef CONFIG_COMPAT |
b126207c DT |
611 | static long joydev_compat_ioctl(struct file *file, |
612 | unsigned int cmd, unsigned long arg) | |
024ac44c | 613 | { |
d0ffb9be DT |
614 | struct joydev_client *client = file->private_data; |
615 | struct joydev *joydev = client->joydev; | |
024ac44c JF |
616 | void __user *argp = (void __user *)arg; |
617 | s32 tmp32; | |
618 | struct JS_DATA_SAVE_TYPE_32 ds32; | |
b126207c | 619 | int retval; |
024ac44c | 620 | |
b126207c DT |
621 | retval = mutex_lock_interruptible(&joydev->mutex); |
622 | if (retval) | |
623 | return retval; | |
624 | ||
625 | if (!joydev->exist) { | |
626 | retval = -ENODEV; | |
627 | goto out; | |
628 | } | |
629 | ||
630 | switch (cmd) { | |
1e0afb28 | 631 | |
024ac44c | 632 | case JS_SET_TIMELIMIT: |
b126207c DT |
633 | retval = get_user(tmp32, (s32 __user *) arg); |
634 | if (retval == 0) | |
024ac44c JF |
635 | joydev->glue.JS_TIMELIMIT = tmp32; |
636 | break; | |
b126207c | 637 | |
024ac44c JF |
638 | case JS_GET_TIMELIMIT: |
639 | tmp32 = joydev->glue.JS_TIMELIMIT; | |
b126207c | 640 | retval = put_user(tmp32, (s32 __user *) arg); |
024ac44c JF |
641 | break; |
642 | ||
643 | case JS_SET_ALL: | |
b126207c DT |
644 | retval = copy_from_user(&ds32, argp, |
645 | sizeof(ds32)) ? -EFAULT : 0; | |
646 | if (retval == 0) { | |
024ac44c JF |
647 | joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT; |
648 | joydev->glue.BUSY = ds32.BUSY; | |
649 | joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME; | |
650 | joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT; | |
651 | joydev->glue.JS_SAVE = ds32.JS_SAVE; | |
652 | joydev->glue.JS_CORR = ds32.JS_CORR; | |
653 | } | |
654 | break; | |
655 | ||
656 | case JS_GET_ALL: | |
657 | ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT; | |
658 | ds32.BUSY = joydev->glue.BUSY; | |
659 | ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME; | |
660 | ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT; | |
661 | ds32.JS_SAVE = joydev->glue.JS_SAVE; | |
662 | ds32.JS_CORR = joydev->glue.JS_CORR; | |
663 | ||
b126207c | 664 | retval = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0; |
024ac44c JF |
665 | break; |
666 | ||
667 | default: | |
b126207c DT |
668 | retval = joydev_ioctl_common(joydev, cmd, argp); |
669 | break; | |
024ac44c | 670 | } |
b126207c DT |
671 | |
672 | out: | |
673 | mutex_unlock(&joydev->mutex); | |
674 | return retval; | |
024ac44c JF |
675 | } |
676 | #endif /* CONFIG_COMPAT */ | |
677 | ||
b126207c DT |
678 | static long joydev_ioctl(struct file *file, |
679 | unsigned int cmd, unsigned long arg) | |
024ac44c | 680 | { |
d0ffb9be DT |
681 | struct joydev_client *client = file->private_data; |
682 | struct joydev *joydev = client->joydev; | |
024ac44c | 683 | void __user *argp = (void __user *)arg; |
b126207c | 684 | int retval; |
024ac44c | 685 | |
b126207c DT |
686 | retval = mutex_lock_interruptible(&joydev->mutex); |
687 | if (retval) | |
688 | return retval; | |
024ac44c | 689 | |
b126207c DT |
690 | if (!joydev->exist) { |
691 | retval = -ENODEV; | |
692 | goto out; | |
024ac44c | 693 | } |
b126207c DT |
694 | |
695 | switch (cmd) { | |
696 | ||
697 | case JS_SET_TIMELIMIT: | |
698 | retval = get_user(joydev->glue.JS_TIMELIMIT, | |
699 | (long __user *) arg); | |
700 | break; | |
701 | ||
702 | case JS_GET_TIMELIMIT: | |
703 | retval = put_user(joydev->glue.JS_TIMELIMIT, | |
704 | (long __user *) arg); | |
705 | break; | |
706 | ||
707 | case JS_SET_ALL: | |
708 | retval = copy_from_user(&joydev->glue, argp, | |
709 | sizeof(joydev->glue)) ? -EFAULT: 0; | |
710 | break; | |
711 | ||
712 | case JS_GET_ALL: | |
713 | retval = copy_to_user(argp, &joydev->glue, | |
714 | sizeof(joydev->glue)) ? -EFAULT : 0; | |
715 | break; | |
716 | ||
717 | default: | |
718 | retval = joydev_ioctl_common(joydev, cmd, argp); | |
719 | break; | |
720 | } | |
721 | out: | |
722 | mutex_unlock(&joydev->mutex); | |
723 | return retval; | |
024ac44c JF |
724 | } |
725 | ||
66e66118 | 726 | static const struct file_operations joydev_fops = { |
b126207c DT |
727 | .owner = THIS_MODULE, |
728 | .read = joydev_read, | |
729 | .poll = joydev_poll, | |
730 | .open = joydev_open, | |
731 | .release = joydev_release, | |
732 | .unlocked_ioctl = joydev_ioctl, | |
024ac44c | 733 | #ifdef CONFIG_COMPAT |
b126207c | 734 | .compat_ioctl = joydev_compat_ioctl, |
024ac44c | 735 | #endif |
b126207c | 736 | .fasync = joydev_fasync, |
1da177e4 LT |
737 | }; |
738 | ||
b126207c DT |
739 | static int joydev_install_chrdev(struct joydev *joydev) |
740 | { | |
741 | joydev_table[joydev->minor] = joydev; | |
742 | return 0; | |
743 | } | |
744 | ||
745 | static void joydev_remove_chrdev(struct joydev *joydev) | |
746 | { | |
747 | mutex_lock(&joydev_table_mutex); | |
748 | joydev_table[joydev->minor] = NULL; | |
749 | mutex_unlock(&joydev_table_mutex); | |
750 | } | |
751 | ||
752 | /* | |
753 | * Mark device non-existant. This disables writes, ioctls and | |
754 | * prevents new users from opening the device. Already posted | |
755 | * blocking reads will stay, however new ones will fail. | |
756 | */ | |
757 | static void joydev_mark_dead(struct joydev *joydev) | |
758 | { | |
759 | mutex_lock(&joydev->mutex); | |
760 | joydev->exist = 0; | |
761 | mutex_unlock(&joydev->mutex); | |
762 | } | |
763 | ||
764 | static void joydev_cleanup(struct joydev *joydev) | |
765 | { | |
766 | struct input_handle *handle = &joydev->handle; | |
767 | ||
768 | joydev_mark_dead(joydev); | |
769 | joydev_hangup(joydev); | |
770 | joydev_remove_chrdev(joydev); | |
771 | ||
772 | /* joydev is marked dead so noone else accesses joydev->open */ | |
773 | if (joydev->open) | |
774 | input_close_device(handle); | |
775 | } | |
776 | ||
5b2a0826 DT |
777 | static int joydev_connect(struct input_handler *handler, struct input_dev *dev, |
778 | const struct input_device_id *id) | |
1da177e4 LT |
779 | { |
780 | struct joydev *joydev; | |
781 | int i, j, t, minor; | |
5b2a0826 | 782 | int error; |
1da177e4 | 783 | |
b126207c DT |
784 | for (minor = 0; minor < JOYDEV_MINORS; minor++) |
785 | if (!joydev_table[minor]) | |
786 | break; | |
787 | ||
1da177e4 LT |
788 | if (minor == JOYDEV_MINORS) { |
789 | printk(KERN_ERR "joydev: no more free joydev devices\n"); | |
5b2a0826 | 790 | return -ENFILE; |
1da177e4 LT |
791 | } |
792 | ||
5b2a0826 DT |
793 | joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL); |
794 | if (!joydev) | |
795 | return -ENOMEM; | |
1da177e4 | 796 | |
d0ffb9be | 797 | INIT_LIST_HEAD(&joydev->client_list); |
b126207c DT |
798 | spin_lock_init(&joydev->client_lock); |
799 | mutex_init(&joydev->mutex); | |
1da177e4 LT |
800 | init_waitqueue_head(&joydev->wait); |
801 | ||
3d5cb60e | 802 | dev_set_name(&joydev->dev, "js%d", minor); |
b126207c | 803 | joydev->exist = 1; |
1da177e4 | 804 | joydev->minor = minor; |
b126207c | 805 | |
1da177e4 | 806 | joydev->exist = 1; |
a7097ff8 | 807 | joydev->handle.dev = input_get_device(dev); |
3d5cb60e | 808 | joydev->handle.name = dev_name(&joydev->dev); |
1da177e4 LT |
809 | joydev->handle.handler = handler; |
810 | joydev->handle.private = joydev; | |
1da177e4 LT |
811 | |
812 | for (i = 0; i < ABS_MAX + 1; i++) | |
813 | if (test_bit(i, dev->absbit)) { | |
814 | joydev->absmap[i] = joydev->nabs; | |
815 | joydev->abspam[joydev->nabs] = i; | |
816 | joydev->nabs++; | |
817 | } | |
818 | ||
819 | for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++) | |
820 | if (test_bit(i + BTN_MISC, dev->keybit)) { | |
821 | joydev->keymap[i] = joydev->nkey; | |
822 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
823 | joydev->nkey++; | |
824 | } | |
825 | ||
f24949e8 | 826 | for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++) |
1da177e4 LT |
827 | if (test_bit(i + BTN_MISC, dev->keybit)) { |
828 | joydev->keymap[i] = joydev->nkey; | |
829 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
830 | joydev->nkey++; | |
831 | } | |
832 | ||
833 | for (i = 0; i < joydev->nabs; i++) { | |
834 | j = joydev->abspam[i]; | |
835 | if (dev->absmax[j] == dev->absmin[j]) { | |
836 | joydev->corr[i].type = JS_CORR_NONE; | |
837 | joydev->abs[i] = dev->abs[j]; | |
838 | continue; | |
839 | } | |
840 | joydev->corr[i].type = JS_CORR_BROKEN; | |
841 | joydev->corr[i].prec = dev->absfuzz[j]; | |
b126207c DT |
842 | joydev->corr[i].coef[0] = |
843 | (dev->absmax[j] + dev->absmin[j]) / 2 - dev->absflat[j]; | |
844 | joydev->corr[i].coef[1] = | |
845 | (dev->absmax[j] + dev->absmin[j]) / 2 + dev->absflat[j]; | |
846 | ||
847 | t = (dev->absmax[j] - dev->absmin[j]) / 2 - 2 * dev->absflat[j]; | |
848 | if (t) { | |
849 | joydev->corr[i].coef[2] = (1 << 29) / t; | |
850 | joydev->corr[i].coef[3] = (1 << 29) / t; | |
851 | ||
852 | joydev->abs[i] = joydev_correct(dev->abs[j], | |
853 | joydev->corr + i); | |
854 | } | |
1da177e4 LT |
855 | } |
856 | ||
b126207c | 857 | joydev->dev.devt = MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor); |
9657d75c DT |
858 | joydev->dev.class = &input_class; |
859 | joydev->dev.parent = &dev->dev; | |
9657d75c DT |
860 | joydev->dev.release = joydev_free; |
861 | device_initialize(&joydev->dev); | |
5b2a0826 | 862 | |
b126207c | 863 | error = input_register_handle(&joydev->handle); |
5b2a0826 | 864 | if (error) |
9657d75c | 865 | goto err_free_joydev; |
5b2a0826 | 866 | |
b126207c | 867 | error = joydev_install_chrdev(joydev); |
5b2a0826 | 868 | if (error) |
b126207c DT |
869 | goto err_unregister_handle; |
870 | ||
871 | error = device_add(&joydev->dev); | |
872 | if (error) | |
873 | goto err_cleanup_joydev; | |
5b2a0826 DT |
874 | |
875 | return 0; | |
1da177e4 | 876 | |
b126207c DT |
877 | err_cleanup_joydev: |
878 | joydev_cleanup(joydev); | |
879 | err_unregister_handle: | |
880 | input_unregister_handle(&joydev->handle); | |
5b2a0826 | 881 | err_free_joydev: |
9657d75c | 882 | put_device(&joydev->dev); |
5b2a0826 | 883 | return error; |
1da177e4 LT |
884 | } |
885 | ||
886 | static void joydev_disconnect(struct input_handle *handle) | |
887 | { | |
888 | struct joydev *joydev = handle->private; | |
1da177e4 | 889 | |
9657d75c | 890 | device_del(&joydev->dev); |
b126207c DT |
891 | joydev_cleanup(joydev); |
892 | input_unregister_handle(handle); | |
9657d75c | 893 | put_device(&joydev->dev); |
1da177e4 LT |
894 | } |
895 | ||
66e66118 | 896 | static const struct input_device_id joydev_blacklist[] = { |
1da177e4 | 897 | { |
b126207c DT |
898 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
899 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
7b19ada2 JS |
900 | .evbit = { BIT_MASK(EV_KEY) }, |
901 | .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) }, | |
d07a9cba TC |
902 | }, /* Avoid itouchpads and touchscreens */ |
903 | { | |
904 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
905 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
906 | .evbit = { BIT_MASK(EV_KEY) }, | |
907 | .keybit = { [BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_DIGI) }, | |
908 | }, /* Avoid tablets, digitisers and similar devices */ | |
1e0afb28 | 909 | { } /* Terminating entry */ |
1da177e4 LT |
910 | }; |
911 | ||
66e66118 | 912 | static const struct input_device_id joydev_ids[] = { |
1da177e4 | 913 | { |
b126207c DT |
914 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
915 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
916 | .evbit = { BIT_MASK(EV_ABS) }, |
917 | .absbit = { BIT_MASK(ABS_X) }, | |
1da177e4 LT |
918 | }, |
919 | { | |
b126207c DT |
920 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
921 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
922 | .evbit = { BIT_MASK(EV_ABS) }, |
923 | .absbit = { BIT_MASK(ABS_WHEEL) }, | |
1da177e4 LT |
924 | }, |
925 | { | |
b126207c DT |
926 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
927 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
928 | .evbit = { BIT_MASK(EV_ABS) }, |
929 | .absbit = { BIT_MASK(ABS_THROTTLE) }, | |
1da177e4 | 930 | }, |
1e0afb28 | 931 | { } /* Terminating entry */ |
1da177e4 LT |
932 | }; |
933 | ||
934 | MODULE_DEVICE_TABLE(input, joydev_ids); | |
935 | ||
936 | static struct input_handler joydev_handler = { | |
b126207c DT |
937 | .event = joydev_event, |
938 | .connect = joydev_connect, | |
939 | .disconnect = joydev_disconnect, | |
940 | .fops = &joydev_fops, | |
941 | .minor = JOYDEV_MINOR_BASE, | |
942 | .name = "joydev", | |
943 | .id_table = joydev_ids, | |
944 | .blacklist = joydev_blacklist, | |
1da177e4 LT |
945 | }; |
946 | ||
947 | static int __init joydev_init(void) | |
948 | { | |
4263cf0f | 949 | return input_register_handler(&joydev_handler); |
1da177e4 LT |
950 | } |
951 | ||
952 | static void __exit joydev_exit(void) | |
953 | { | |
954 | input_unregister_handler(&joydev_handler); | |
955 | } | |
956 | ||
957 | module_init(joydev_init); | |
958 | module_exit(joydev_exit); |