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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 | ||
da0c4901 JP |
13 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
14 | ||
1da177e4 LT |
15 | #include <asm/io.h> |
16 | #include <asm/system.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/errno.h> | |
19 | #include <linux/joystick.h> | |
20 | #include <linux/input.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/major.h> | |
a99bbaf5 | 23 | #include <linux/sched.h> |
1da177e4 LT |
24 | #include <linux/slab.h> |
25 | #include <linux/mm.h> | |
26 | #include <linux/miscdevice.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/poll.h> | |
29 | #include <linux/init.h> | |
1da177e4 | 30 | #include <linux/device.h> |
1da177e4 LT |
31 | |
32 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
33 | MODULE_DESCRIPTION("Joystick device interfaces"); | |
34 | MODULE_SUPPORTED_DEVICE("input/js"); | |
35 | MODULE_LICENSE("GPL"); | |
36 | ||
37 | #define JOYDEV_MINOR_BASE 0 | |
38 | #define JOYDEV_MINORS 16 | |
39 | #define JOYDEV_BUFFER_SIZE 64 | |
40 | ||
1da177e4 | 41 | struct joydev { |
1da177e4 LT |
42 | int open; |
43 | int minor; | |
1da177e4 LT |
44 | struct input_handle handle; |
45 | wait_queue_head_t wait; | |
d0ffb9be | 46 | struct list_head client_list; |
b126207c DT |
47 | spinlock_t client_lock; /* protects client_list */ |
48 | struct mutex mutex; | |
9657d75c | 49 | struct device dev; |
20da92de | 50 | bool exist; |
9657d75c | 51 | |
81c2a3ba | 52 | struct js_corr corr[ABS_CNT]; |
1da177e4 LT |
53 | struct JS_DATA_SAVE_TYPE glue; |
54 | int nabs; | |
55 | int nkey; | |
56 | __u16 keymap[KEY_MAX - BTN_MISC + 1]; | |
57 | __u16 keypam[KEY_MAX - BTN_MISC + 1]; | |
81c2a3ba DM |
58 | __u8 absmap[ABS_CNT]; |
59 | __u8 abspam[ABS_CNT]; | |
60 | __s16 abs[ABS_CNT]; | |
1da177e4 LT |
61 | }; |
62 | ||
d0ffb9be | 63 | struct joydev_client { |
1da177e4 LT |
64 | struct js_event buffer[JOYDEV_BUFFER_SIZE]; |
65 | int head; | |
66 | int tail; | |
67 | int startup; | |
b126207c | 68 | spinlock_t buffer_lock; /* protects access to buffer, head and tail */ |
1da177e4 LT |
69 | struct fasync_struct *fasync; |
70 | struct joydev *joydev; | |
71 | struct list_head node; | |
72 | }; | |
73 | ||
74 | static struct joydev *joydev_table[JOYDEV_MINORS]; | |
b126207c | 75 | static DEFINE_MUTEX(joydev_table_mutex); |
1da177e4 LT |
76 | |
77 | static int joydev_correct(int value, struct js_corr *corr) | |
78 | { | |
79 | switch (corr->type) { | |
b126207c DT |
80 | |
81 | case JS_CORR_NONE: | |
82 | break; | |
83 | ||
84 | case JS_CORR_BROKEN: | |
85 | value = value > corr->coef[0] ? (value < corr->coef[1] ? 0 : | |
86 | ((corr->coef[3] * (value - corr->coef[1])) >> 14)) : | |
87 | ((corr->coef[2] * (value - corr->coef[0])) >> 14); | |
88 | break; | |
89 | ||
90 | default: | |
91 | return 0; | |
1da177e4 LT |
92 | } |
93 | ||
1e0afb28 | 94 | return value < -32767 ? -32767 : (value > 32767 ? 32767 : value); |
1da177e4 LT |
95 | } |
96 | ||
b126207c DT |
97 | static void joydev_pass_event(struct joydev_client *client, |
98 | struct js_event *event) | |
99 | { | |
100 | struct joydev *joydev = client->joydev; | |
101 | ||
102 | /* | |
103 | * IRQs already disabled, just acquire the lock | |
104 | */ | |
105 | spin_lock(&client->buffer_lock); | |
106 | ||
107 | client->buffer[client->head] = *event; | |
108 | ||
109 | if (client->startup == joydev->nabs + joydev->nkey) { | |
110 | client->head++; | |
111 | client->head &= JOYDEV_BUFFER_SIZE - 1; | |
112 | if (client->tail == client->head) | |
113 | client->startup = 0; | |
114 | } | |
115 | ||
116 | spin_unlock(&client->buffer_lock); | |
117 | ||
118 | kill_fasync(&client->fasync, SIGIO, POLL_IN); | |
119 | } | |
120 | ||
121 | static void joydev_event(struct input_handle *handle, | |
122 | unsigned int type, unsigned int code, int value) | |
1da177e4 LT |
123 | { |
124 | struct joydev *joydev = handle->private; | |
d0ffb9be | 125 | struct joydev_client *client; |
1da177e4 LT |
126 | struct js_event event; |
127 | ||
128 | switch (type) { | |
129 | ||
b126207c DT |
130 | case EV_KEY: |
131 | if (code < BTN_MISC || value == 2) | |
132 | return; | |
133 | event.type = JS_EVENT_BUTTON; | |
134 | event.number = joydev->keymap[code - BTN_MISC]; | |
135 | event.value = value; | |
136 | break; | |
1da177e4 | 137 | |
b126207c DT |
138 | case EV_ABS: |
139 | event.type = JS_EVENT_AXIS; | |
140 | event.number = joydev->absmap[code]; | |
141 | event.value = joydev_correct(value, | |
142 | &joydev->corr[event.number]); | |
143 | if (event.value == joydev->abs[event.number]) | |
1da177e4 | 144 | return; |
b126207c DT |
145 | joydev->abs[event.number] = event.value; |
146 | break; | |
147 | ||
148 | default: | |
149 | return; | |
1da177e4 LT |
150 | } |
151 | ||
6f5eacfc | 152 | event.time = jiffies_to_msecs(jiffies); |
1da177e4 | 153 | |
82ba56c2 | 154 | rcu_read_lock(); |
b126207c DT |
155 | list_for_each_entry_rcu(client, &joydev->client_list, node) |
156 | joydev_pass_event(client, &event); | |
82ba56c2 | 157 | rcu_read_unlock(); |
1da177e4 LT |
158 | |
159 | wake_up_interruptible(&joydev->wait); | |
160 | } | |
161 | ||
162 | static int joydev_fasync(int fd, struct file *file, int on) | |
163 | { | |
d0ffb9be | 164 | struct joydev_client *client = file->private_data; |
1e0afb28 | 165 | |
60aa4924 | 166 | return fasync_helper(fd, file, on, &client->fasync); |
1da177e4 LT |
167 | } |
168 | ||
9657d75c | 169 | static void joydev_free(struct device *dev) |
1da177e4 | 170 | { |
9657d75c DT |
171 | struct joydev *joydev = container_of(dev, struct joydev, dev); |
172 | ||
a7097ff8 | 173 | input_put_device(joydev->handle.dev); |
1da177e4 LT |
174 | kfree(joydev); |
175 | } | |
176 | ||
b126207c DT |
177 | static void joydev_attach_client(struct joydev *joydev, |
178 | struct joydev_client *client) | |
179 | { | |
180 | spin_lock(&joydev->client_lock); | |
181 | list_add_tail_rcu(&client->node, &joydev->client_list); | |
182 | spin_unlock(&joydev->client_lock); | |
b126207c DT |
183 | } |
184 | ||
185 | static void joydev_detach_client(struct joydev *joydev, | |
186 | struct joydev_client *client) | |
187 | { | |
188 | spin_lock(&joydev->client_lock); | |
189 | list_del_rcu(&client->node); | |
190 | spin_unlock(&joydev->client_lock); | |
82ba56c2 | 191 | synchronize_rcu(); |
b126207c DT |
192 | } |
193 | ||
194 | static int joydev_open_device(struct joydev *joydev) | |
195 | { | |
196 | int retval; | |
197 | ||
198 | retval = mutex_lock_interruptible(&joydev->mutex); | |
199 | if (retval) | |
200 | return retval; | |
201 | ||
202 | if (!joydev->exist) | |
203 | retval = -ENODEV; | |
06445014 | 204 | else if (!joydev->open++) { |
b126207c | 205 | retval = input_open_device(&joydev->handle); |
06445014 ON |
206 | if (retval) |
207 | joydev->open--; | |
208 | } | |
b126207c DT |
209 | |
210 | mutex_unlock(&joydev->mutex); | |
211 | return retval; | |
212 | } | |
213 | ||
214 | static void joydev_close_device(struct joydev *joydev) | |
215 | { | |
216 | mutex_lock(&joydev->mutex); | |
217 | ||
218 | if (joydev->exist && !--joydev->open) | |
219 | input_close_device(&joydev->handle); | |
220 | ||
221 | mutex_unlock(&joydev->mutex); | |
222 | } | |
223 | ||
224 | /* | |
225 | * Wake up users waiting for IO so they can disconnect from | |
226 | * dead device. | |
227 | */ | |
228 | static void joydev_hangup(struct joydev *joydev) | |
229 | { | |
230 | struct joydev_client *client; | |
231 | ||
232 | spin_lock(&joydev->client_lock); | |
233 | list_for_each_entry(client, &joydev->client_list, node) | |
234 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
235 | spin_unlock(&joydev->client_lock); | |
236 | ||
237 | wake_up_interruptible(&joydev->wait); | |
238 | } | |
239 | ||
d0ffb9be | 240 | static int joydev_release(struct inode *inode, struct file *file) |
1da177e4 | 241 | { |
d0ffb9be DT |
242 | struct joydev_client *client = file->private_data; |
243 | struct joydev *joydev = client->joydev; | |
1da177e4 | 244 | |
b126207c | 245 | joydev_detach_client(joydev, client); |
d0ffb9be | 246 | kfree(client); |
1da177e4 | 247 | |
b126207c | 248 | joydev_close_device(joydev); |
9657d75c | 249 | put_device(&joydev->dev); |
1da177e4 | 250 | |
1da177e4 LT |
251 | return 0; |
252 | } | |
253 | ||
254 | static int joydev_open(struct inode *inode, struct file *file) | |
255 | { | |
d0ffb9be DT |
256 | struct joydev_client *client; |
257 | struct joydev *joydev; | |
1da177e4 | 258 | int i = iminor(inode) - JOYDEV_MINOR_BASE; |
d542ed82 | 259 | int error; |
1da177e4 | 260 | |
d0ffb9be DT |
261 | if (i >= JOYDEV_MINORS) |
262 | return -ENODEV; | |
1da177e4 | 263 | |
b126207c DT |
264 | error = mutex_lock_interruptible(&joydev_table_mutex); |
265 | if (error) | |
266 | return error; | |
d0ffb9be | 267 | joydev = joydev_table[i]; |
b126207c DT |
268 | if (joydev) |
269 | get_device(&joydev->dev); | |
270 | mutex_unlock(&joydev_table_mutex); | |
1da177e4 | 271 | |
b126207c DT |
272 | if (!joydev) |
273 | return -ENODEV; | |
9657d75c | 274 | |
d0ffb9be | 275 | client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL); |
9657d75c DT |
276 | if (!client) { |
277 | error = -ENOMEM; | |
278 | goto err_put_joydev; | |
279 | } | |
1da177e4 | 280 | |
b126207c | 281 | spin_lock_init(&client->buffer_lock); |
d0ffb9be | 282 | client->joydev = joydev; |
b126207c | 283 | joydev_attach_client(joydev, client); |
1da177e4 | 284 | |
b126207c DT |
285 | error = joydev_open_device(joydev); |
286 | if (error) | |
287 | goto err_free_client; | |
1da177e4 | 288 | |
d0ffb9be | 289 | file->private_data = client; |
3d7bbd45 DT |
290 | nonseekable_open(inode, file); |
291 | ||
1da177e4 | 292 | return 0; |
9657d75c DT |
293 | |
294 | err_free_client: | |
b126207c | 295 | joydev_detach_client(joydev, client); |
9657d75c DT |
296 | kfree(client); |
297 | err_put_joydev: | |
298 | put_device(&joydev->dev); | |
299 | return error; | |
1da177e4 LT |
300 | } |
301 | ||
b126207c DT |
302 | static int joydev_generate_startup_event(struct joydev_client *client, |
303 | struct input_dev *input, | |
304 | struct js_event *event) | |
1da177e4 | 305 | { |
b126207c DT |
306 | struct joydev *joydev = client->joydev; |
307 | int have_event; | |
308 | ||
309 | spin_lock_irq(&client->buffer_lock); | |
310 | ||
311 | have_event = client->startup < joydev->nabs + joydev->nkey; | |
312 | ||
313 | if (have_event) { | |
314 | ||
315 | event->time = jiffies_to_msecs(jiffies); | |
316 | if (client->startup < joydev->nkey) { | |
317 | event->type = JS_EVENT_BUTTON | JS_EVENT_INIT; | |
318 | event->number = client->startup; | |
319 | event->value = !!test_bit(joydev->keypam[event->number], | |
320 | input->key); | |
321 | } else { | |
322 | event->type = JS_EVENT_AXIS | JS_EVENT_INIT; | |
323 | event->number = client->startup - joydev->nkey; | |
324 | event->value = joydev->abs[event->number]; | |
325 | } | |
326 | client->startup++; | |
327 | } | |
328 | ||
329 | spin_unlock_irq(&client->buffer_lock); | |
330 | ||
331 | return have_event; | |
332 | } | |
333 | ||
334 | static int joydev_fetch_next_event(struct joydev_client *client, | |
335 | struct js_event *event) | |
336 | { | |
337 | int have_event; | |
338 | ||
339 | spin_lock_irq(&client->buffer_lock); | |
340 | ||
341 | have_event = client->head != client->tail; | |
342 | if (have_event) { | |
343 | *event = client->buffer[client->tail++]; | |
344 | client->tail &= JOYDEV_BUFFER_SIZE - 1; | |
345 | } | |
346 | ||
347 | spin_unlock_irq(&client->buffer_lock); | |
348 | ||
349 | return have_event; | |
350 | } | |
351 | ||
352 | /* | |
353 | * Old joystick interface | |
354 | */ | |
355 | static ssize_t joydev_0x_read(struct joydev_client *client, | |
356 | struct input_dev *input, | |
357 | char __user *buf) | |
358 | { | |
359 | struct joydev *joydev = client->joydev; | |
360 | struct JS_DATA_TYPE data; | |
361 | int i; | |
362 | ||
363 | spin_lock_irq(&input->event_lock); | |
364 | ||
365 | /* | |
366 | * Get device state | |
367 | */ | |
368 | for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++) | |
369 | data.buttons |= | |
370 | test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0; | |
371 | data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x; | |
372 | data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y; | |
373 | ||
374 | /* | |
375 | * Reset reader's event queue | |
376 | */ | |
377 | spin_lock(&client->buffer_lock); | |
378 | client->startup = 0; | |
379 | client->tail = client->head; | |
380 | spin_unlock(&client->buffer_lock); | |
381 | ||
382 | spin_unlock_irq(&input->event_lock); | |
383 | ||
384 | if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE))) | |
385 | return -EFAULT; | |
386 | ||
387 | return sizeof(struct JS_DATA_TYPE); | |
1da177e4 LT |
388 | } |
389 | ||
b126207c DT |
390 | static inline int joydev_data_pending(struct joydev_client *client) |
391 | { | |
392 | struct joydev *joydev = client->joydev; | |
393 | ||
394 | return client->startup < joydev->nabs + joydev->nkey || | |
395 | client->head != client->tail; | |
396 | } | |
397 | ||
398 | static ssize_t joydev_read(struct file *file, char __user *buf, | |
399 | size_t count, loff_t *ppos) | |
1da177e4 | 400 | { |
d0ffb9be DT |
401 | struct joydev_client *client = file->private_data; |
402 | struct joydev *joydev = client->joydev; | |
1da177e4 | 403 | struct input_dev *input = joydev->handle.dev; |
b126207c DT |
404 | struct js_event event; |
405 | int retval; | |
1da177e4 | 406 | |
d0ffb9be | 407 | if (!joydev->exist) |
1da177e4 LT |
408 | return -ENODEV; |
409 | ||
410 | if (count < sizeof(struct js_event)) | |
411 | return -EINVAL; | |
412 | ||
b126207c DT |
413 | if (count == sizeof(struct JS_DATA_TYPE)) |
414 | return joydev_0x_read(client, input, buf); | |
1da177e4 | 415 | |
b126207c | 416 | if (!joydev_data_pending(client) && (file->f_flags & O_NONBLOCK)) |
1e0afb28 | 417 | return -EAGAIN; |
1da177e4 | 418 | |
d0ffb9be | 419 | retval = wait_event_interruptible(joydev->wait, |
b126207c | 420 | !joydev->exist || joydev_data_pending(client)); |
1da177e4 LT |
421 | if (retval) |
422 | return retval; | |
423 | ||
d0ffb9be | 424 | if (!joydev->exist) |
1da177e4 LT |
425 | return -ENODEV; |
426 | ||
b126207c DT |
427 | while (retval + sizeof(struct js_event) <= count && |
428 | joydev_generate_startup_event(client, input, &event)) { | |
1da177e4 LT |
429 | |
430 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) | |
431 | return -EFAULT; | |
432 | ||
1da177e4 LT |
433 | retval += sizeof(struct js_event); |
434 | } | |
435 | ||
b126207c DT |
436 | while (retval + sizeof(struct js_event) <= count && |
437 | joydev_fetch_next_event(client, &event)) { | |
1da177e4 | 438 | |
b126207c | 439 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) |
1da177e4 LT |
440 | return -EFAULT; |
441 | ||
1da177e4 LT |
442 | retval += sizeof(struct js_event); |
443 | } | |
444 | ||
445 | return retval; | |
446 | } | |
447 | ||
448 | /* No kernel lock - fine */ | |
449 | static unsigned int joydev_poll(struct file *file, poll_table *wait) | |
450 | { | |
d0ffb9be DT |
451 | struct joydev_client *client = file->private_data; |
452 | struct joydev *joydev = client->joydev; | |
1e0afb28 | 453 | |
d0ffb9be | 454 | poll_wait(file, &joydev->wait, wait); |
b126207c DT |
455 | return (joydev_data_pending(client) ? (POLLIN | POLLRDNORM) : 0) | |
456 | (joydev->exist ? 0 : (POLLHUP | POLLERR)); | |
1da177e4 LT |
457 | } |
458 | ||
999b874f SK |
459 | static int joydev_handle_JSIOCSAXMAP(struct joydev *joydev, |
460 | void __user *argp, size_t len) | |
461 | { | |
462 | __u8 *abspam; | |
463 | int i; | |
464 | int retval = 0; | |
465 | ||
466 | len = min(len, sizeof(joydev->abspam)); | |
467 | ||
468 | /* Validate the map. */ | |
469 | abspam = kmalloc(len, GFP_KERNEL); | |
470 | if (!abspam) | |
471 | return -ENOMEM; | |
472 | ||
473 | if (copy_from_user(abspam, argp, len)) { | |
474 | retval = -EFAULT; | |
475 | goto out; | |
476 | } | |
477 | ||
478 | for (i = 0; i < joydev->nabs; i++) { | |
479 | if (abspam[i] > ABS_MAX) { | |
480 | retval = -EINVAL; | |
481 | goto out; | |
482 | } | |
483 | } | |
484 | ||
485 | memcpy(joydev->abspam, abspam, len); | |
486 | ||
d2520a42 KW |
487 | for (i = 0; i < joydev->nabs; i++) |
488 | joydev->absmap[joydev->abspam[i]] = i; | |
489 | ||
999b874f SK |
490 | out: |
491 | kfree(abspam); | |
492 | return retval; | |
493 | } | |
494 | ||
495 | static int joydev_handle_JSIOCSBTNMAP(struct joydev *joydev, | |
496 | void __user *argp, size_t len) | |
497 | { | |
498 | __u16 *keypam; | |
499 | int i; | |
500 | int retval = 0; | |
501 | ||
502 | len = min(len, sizeof(joydev->keypam)); | |
503 | ||
504 | /* Validate the map. */ | |
505 | keypam = kmalloc(len, GFP_KERNEL); | |
506 | if (!keypam) | |
507 | return -ENOMEM; | |
508 | ||
509 | if (copy_from_user(keypam, argp, len)) { | |
510 | retval = -EFAULT; | |
511 | goto out; | |
512 | } | |
513 | ||
514 | for (i = 0; i < joydev->nkey; i++) { | |
515 | if (keypam[i] > KEY_MAX || keypam[i] < BTN_MISC) { | |
516 | retval = -EINVAL; | |
517 | goto out; | |
518 | } | |
519 | } | |
520 | ||
521 | memcpy(joydev->keypam, keypam, len); | |
522 | ||
523 | for (i = 0; i < joydev->nkey; i++) | |
524 | joydev->keymap[keypam[i] - BTN_MISC] = i; | |
525 | ||
526 | out: | |
527 | kfree(keypam); | |
528 | return retval; | |
529 | } | |
530 | ||
531 | ||
b126207c DT |
532 | static int joydev_ioctl_common(struct joydev *joydev, |
533 | unsigned int cmd, void __user *argp) | |
1da177e4 | 534 | { |
1da177e4 | 535 | struct input_dev *dev = joydev->handle.dev; |
ec8b4b70 | 536 | size_t len; |
987a6c02 | 537 | int i; |
ec8b4b70 | 538 | const char *name; |
1da177e4 | 539 | |
ec8b4b70 | 540 | /* Process fixed-sized commands. */ |
1da177e4 LT |
541 | switch (cmd) { |
542 | ||
b126207c DT |
543 | case JS_SET_CAL: |
544 | return copy_from_user(&joydev->glue.JS_CORR, argp, | |
024ac44c | 545 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 546 | |
b126207c DT |
547 | case JS_GET_CAL: |
548 | return copy_to_user(argp, &joydev->glue.JS_CORR, | |
024ac44c | 549 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 550 | |
b126207c DT |
551 | case JS_SET_TIMEOUT: |
552 | return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1e0afb28 | 553 | |
b126207c DT |
554 | case JS_GET_TIMEOUT: |
555 | return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1da177e4 | 556 | |
b126207c DT |
557 | case JSIOCGVERSION: |
558 | return put_user(JS_VERSION, (__u32 __user *) argp); | |
1e0afb28 | 559 | |
b126207c DT |
560 | case JSIOCGAXES: |
561 | return put_user(joydev->nabs, (__u8 __user *) argp); | |
1e0afb28 | 562 | |
b126207c DT |
563 | case JSIOCGBUTTONS: |
564 | return put_user(joydev->nkey, (__u8 __user *) argp); | |
1e0afb28 | 565 | |
b126207c DT |
566 | case JSIOCSCORR: |
567 | if (copy_from_user(joydev->corr, argp, | |
568 | sizeof(joydev->corr[0]) * joydev->nabs)) | |
987a6c02 | 569 | return -EFAULT; |
1e0afb28 | 570 | |
b126207c | 571 | for (i = 0; i < joydev->nabs; i++) { |
987a6c02 DM |
572 | int val = input_abs_get_val(dev, joydev->abspam[i]); |
573 | joydev->abs[i] = joydev_correct(val, &joydev->corr[i]); | |
b126207c DT |
574 | } |
575 | return 0; | |
1e0afb28 | 576 | |
b126207c DT |
577 | case JSIOCGCORR: |
578 | return copy_to_user(argp, joydev->corr, | |
579 | sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0; | |
580 | ||
ec8b4b70 SK |
581 | } |
582 | ||
583 | /* | |
584 | * Process variable-sized commands (the axis and button map commands | |
585 | * are considered variable-sized to decouple them from the values of | |
586 | * ABS_MAX and KEY_MAX). | |
587 | */ | |
588 | switch (cmd & ~IOCSIZE_MASK) { | |
589 | ||
590 | case (JSIOCSAXMAP & ~IOCSIZE_MASK): | |
999b874f | 591 | return joydev_handle_JSIOCSAXMAP(joydev, argp, _IOC_SIZE(cmd)); |
b126207c | 592 | |
ec8b4b70 SK |
593 | case (JSIOCGAXMAP & ~IOCSIZE_MASK): |
594 | len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->abspam)); | |
999b874f | 595 | return copy_to_user(argp, joydev->abspam, len) ? -EFAULT : len; |
ec8b4b70 SK |
596 | |
597 | case (JSIOCSBTNMAP & ~IOCSIZE_MASK): | |
999b874f | 598 | return joydev_handle_JSIOCSBTNMAP(joydev, argp, _IOC_SIZE(cmd)); |
b126207c | 599 | |
ec8b4b70 SK |
600 | case (JSIOCGBTNMAP & ~IOCSIZE_MASK): |
601 | len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->keypam)); | |
999b874f | 602 | return copy_to_user(argp, joydev->keypam, len) ? -EFAULT : len; |
b126207c | 603 | |
ec8b4b70 SK |
604 | case JSIOCGNAME(0): |
605 | name = dev->name; | |
606 | if (!name) | |
607 | return 0; | |
608 | ||
609 | len = min_t(size_t, _IOC_SIZE(cmd), strlen(name) + 1); | |
610 | return copy_to_user(argp, name, len) ? -EFAULT : len; | |
1da177e4 | 611 | } |
ec8b4b70 | 612 | |
1da177e4 LT |
613 | return -EINVAL; |
614 | } | |
615 | ||
024ac44c | 616 | #ifdef CONFIG_COMPAT |
b126207c DT |
617 | static long joydev_compat_ioctl(struct file *file, |
618 | unsigned int cmd, unsigned long arg) | |
024ac44c | 619 | { |
d0ffb9be DT |
620 | struct joydev_client *client = file->private_data; |
621 | struct joydev *joydev = client->joydev; | |
024ac44c JF |
622 | void __user *argp = (void __user *)arg; |
623 | s32 tmp32; | |
624 | struct JS_DATA_SAVE_TYPE_32 ds32; | |
b126207c | 625 | int retval; |
024ac44c | 626 | |
b126207c DT |
627 | retval = mutex_lock_interruptible(&joydev->mutex); |
628 | if (retval) | |
629 | return retval; | |
630 | ||
631 | if (!joydev->exist) { | |
632 | retval = -ENODEV; | |
633 | goto out; | |
634 | } | |
635 | ||
636 | switch (cmd) { | |
1e0afb28 | 637 | |
024ac44c | 638 | case JS_SET_TIMELIMIT: |
b126207c DT |
639 | retval = get_user(tmp32, (s32 __user *) arg); |
640 | if (retval == 0) | |
024ac44c JF |
641 | joydev->glue.JS_TIMELIMIT = tmp32; |
642 | break; | |
b126207c | 643 | |
024ac44c JF |
644 | case JS_GET_TIMELIMIT: |
645 | tmp32 = joydev->glue.JS_TIMELIMIT; | |
b126207c | 646 | retval = put_user(tmp32, (s32 __user *) arg); |
024ac44c JF |
647 | break; |
648 | ||
649 | case JS_SET_ALL: | |
b126207c DT |
650 | retval = copy_from_user(&ds32, argp, |
651 | sizeof(ds32)) ? -EFAULT : 0; | |
652 | if (retval == 0) { | |
024ac44c JF |
653 | joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT; |
654 | joydev->glue.BUSY = ds32.BUSY; | |
655 | joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME; | |
656 | joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT; | |
657 | joydev->glue.JS_SAVE = ds32.JS_SAVE; | |
658 | joydev->glue.JS_CORR = ds32.JS_CORR; | |
659 | } | |
660 | break; | |
661 | ||
662 | case JS_GET_ALL: | |
663 | ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT; | |
664 | ds32.BUSY = joydev->glue.BUSY; | |
665 | ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME; | |
666 | ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT; | |
667 | ds32.JS_SAVE = joydev->glue.JS_SAVE; | |
668 | ds32.JS_CORR = joydev->glue.JS_CORR; | |
669 | ||
b126207c | 670 | retval = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0; |
024ac44c JF |
671 | break; |
672 | ||
673 | default: | |
b126207c DT |
674 | retval = joydev_ioctl_common(joydev, cmd, argp); |
675 | break; | |
024ac44c | 676 | } |
b126207c DT |
677 | |
678 | out: | |
679 | mutex_unlock(&joydev->mutex); | |
680 | return retval; | |
024ac44c JF |
681 | } |
682 | #endif /* CONFIG_COMPAT */ | |
683 | ||
b126207c DT |
684 | static long joydev_ioctl(struct file *file, |
685 | unsigned int cmd, unsigned long arg) | |
024ac44c | 686 | { |
d0ffb9be DT |
687 | struct joydev_client *client = file->private_data; |
688 | struct joydev *joydev = client->joydev; | |
024ac44c | 689 | void __user *argp = (void __user *)arg; |
b126207c | 690 | int retval; |
024ac44c | 691 | |
b126207c DT |
692 | retval = mutex_lock_interruptible(&joydev->mutex); |
693 | if (retval) | |
694 | return retval; | |
024ac44c | 695 | |
b126207c DT |
696 | if (!joydev->exist) { |
697 | retval = -ENODEV; | |
698 | goto out; | |
024ac44c | 699 | } |
b126207c DT |
700 | |
701 | switch (cmd) { | |
702 | ||
703 | case JS_SET_TIMELIMIT: | |
704 | retval = get_user(joydev->glue.JS_TIMELIMIT, | |
705 | (long __user *) arg); | |
706 | break; | |
707 | ||
708 | case JS_GET_TIMELIMIT: | |
709 | retval = put_user(joydev->glue.JS_TIMELIMIT, | |
710 | (long __user *) arg); | |
711 | break; | |
712 | ||
713 | case JS_SET_ALL: | |
714 | retval = copy_from_user(&joydev->glue, argp, | |
715 | sizeof(joydev->glue)) ? -EFAULT: 0; | |
716 | break; | |
717 | ||
718 | case JS_GET_ALL: | |
719 | retval = copy_to_user(argp, &joydev->glue, | |
720 | sizeof(joydev->glue)) ? -EFAULT : 0; | |
721 | break; | |
722 | ||
723 | default: | |
724 | retval = joydev_ioctl_common(joydev, cmd, argp); | |
725 | break; | |
726 | } | |
727 | out: | |
728 | mutex_unlock(&joydev->mutex); | |
729 | return retval; | |
024ac44c JF |
730 | } |
731 | ||
66e66118 | 732 | static const struct file_operations joydev_fops = { |
b126207c DT |
733 | .owner = THIS_MODULE, |
734 | .read = joydev_read, | |
735 | .poll = joydev_poll, | |
736 | .open = joydev_open, | |
737 | .release = joydev_release, | |
738 | .unlocked_ioctl = joydev_ioctl, | |
024ac44c | 739 | #ifdef CONFIG_COMPAT |
b126207c | 740 | .compat_ioctl = joydev_compat_ioctl, |
024ac44c | 741 | #endif |
b126207c | 742 | .fasync = joydev_fasync, |
6038f373 | 743 | .llseek = no_llseek, |
1da177e4 LT |
744 | }; |
745 | ||
b126207c DT |
746 | static int joydev_install_chrdev(struct joydev *joydev) |
747 | { | |
748 | joydev_table[joydev->minor] = joydev; | |
749 | return 0; | |
750 | } | |
751 | ||
752 | static void joydev_remove_chrdev(struct joydev *joydev) | |
753 | { | |
754 | mutex_lock(&joydev_table_mutex); | |
755 | joydev_table[joydev->minor] = NULL; | |
756 | mutex_unlock(&joydev_table_mutex); | |
757 | } | |
758 | ||
759 | /* | |
25985edc | 760 | * Mark device non-existent. This disables writes, ioctls and |
b126207c DT |
761 | * prevents new users from opening the device. Already posted |
762 | * blocking reads will stay, however new ones will fail. | |
763 | */ | |
764 | static void joydev_mark_dead(struct joydev *joydev) | |
765 | { | |
766 | mutex_lock(&joydev->mutex); | |
20da92de | 767 | joydev->exist = false; |
b126207c DT |
768 | mutex_unlock(&joydev->mutex); |
769 | } | |
770 | ||
771 | static void joydev_cleanup(struct joydev *joydev) | |
772 | { | |
773 | struct input_handle *handle = &joydev->handle; | |
774 | ||
775 | joydev_mark_dead(joydev); | |
776 | joydev_hangup(joydev); | |
777 | joydev_remove_chrdev(joydev); | |
778 | ||
25985edc | 779 | /* joydev is marked dead so no one else accesses joydev->open */ |
b126207c DT |
780 | if (joydev->open) |
781 | input_close_device(handle); | |
782 | } | |
783 | ||
0b7024ac DT |
784 | |
785 | static bool joydev_match(struct input_handler *handler, struct input_dev *dev) | |
786 | { | |
787 | /* Avoid touchpads and touchscreens */ | |
788 | if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_TOUCH, dev->keybit)) | |
789 | return false; | |
790 | ||
791 | /* Avoid tablets, digitisers and similar devices */ | |
792 | if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_DIGI, dev->keybit)) | |
793 | return false; | |
794 | ||
795 | return true; | |
796 | } | |
797 | ||
5b2a0826 DT |
798 | static int joydev_connect(struct input_handler *handler, struct input_dev *dev, |
799 | const struct input_device_id *id) | |
1da177e4 LT |
800 | { |
801 | struct joydev *joydev; | |
802 | int i, j, t, minor; | |
5b2a0826 | 803 | int error; |
1da177e4 | 804 | |
b126207c DT |
805 | for (minor = 0; minor < JOYDEV_MINORS; minor++) |
806 | if (!joydev_table[minor]) | |
807 | break; | |
808 | ||
1da177e4 | 809 | if (minor == JOYDEV_MINORS) { |
da0c4901 | 810 | pr_err("no more free joydev devices\n"); |
5b2a0826 | 811 | return -ENFILE; |
1da177e4 LT |
812 | } |
813 | ||
5b2a0826 DT |
814 | joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL); |
815 | if (!joydev) | |
816 | return -ENOMEM; | |
1da177e4 | 817 | |
d0ffb9be | 818 | INIT_LIST_HEAD(&joydev->client_list); |
b126207c DT |
819 | spin_lock_init(&joydev->client_lock); |
820 | mutex_init(&joydev->mutex); | |
1da177e4 LT |
821 | init_waitqueue_head(&joydev->wait); |
822 | ||
3d5cb60e | 823 | dev_set_name(&joydev->dev, "js%d", minor); |
20da92de | 824 | joydev->exist = true; |
1da177e4 | 825 | joydev->minor = minor; |
b126207c | 826 | |
a7097ff8 | 827 | joydev->handle.dev = input_get_device(dev); |
3d5cb60e | 828 | joydev->handle.name = dev_name(&joydev->dev); |
1da177e4 LT |
829 | joydev->handle.handler = handler; |
830 | joydev->handle.private = joydev; | |
1da177e4 | 831 | |
81c2a3ba | 832 | for (i = 0; i < ABS_CNT; i++) |
1da177e4 LT |
833 | if (test_bit(i, dev->absbit)) { |
834 | joydev->absmap[i] = joydev->nabs; | |
835 | joydev->abspam[joydev->nabs] = i; | |
836 | joydev->nabs++; | |
837 | } | |
838 | ||
839 | for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++) | |
840 | if (test_bit(i + BTN_MISC, dev->keybit)) { | |
841 | joydev->keymap[i] = joydev->nkey; | |
842 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
843 | joydev->nkey++; | |
844 | } | |
845 | ||
f24949e8 | 846 | for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++) |
1da177e4 LT |
847 | if (test_bit(i + BTN_MISC, dev->keybit)) { |
848 | joydev->keymap[i] = joydev->nkey; | |
849 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
850 | joydev->nkey++; | |
851 | } | |
852 | ||
853 | for (i = 0; i < joydev->nabs; i++) { | |
854 | j = joydev->abspam[i]; | |
987a6c02 | 855 | if (input_abs_get_max(dev, j) == input_abs_get_min(dev, j)) { |
1da177e4 | 856 | joydev->corr[i].type = JS_CORR_NONE; |
987a6c02 | 857 | joydev->abs[i] = input_abs_get_val(dev, j); |
1da177e4 LT |
858 | continue; |
859 | } | |
860 | joydev->corr[i].type = JS_CORR_BROKEN; | |
987a6c02 DM |
861 | joydev->corr[i].prec = input_abs_get_fuzz(dev, j); |
862 | ||
863 | t = (input_abs_get_max(dev, j) + input_abs_get_min(dev, j)) / 2; | |
864 | joydev->corr[i].coef[0] = t - input_abs_get_flat(dev, j); | |
865 | joydev->corr[i].coef[1] = t + input_abs_get_flat(dev, j); | |
b126207c | 866 | |
987a6c02 DM |
867 | t = (input_abs_get_max(dev, j) - input_abs_get_min(dev, j)) / 2 |
868 | - 2 * input_abs_get_flat(dev, j); | |
b126207c DT |
869 | if (t) { |
870 | joydev->corr[i].coef[2] = (1 << 29) / t; | |
871 | joydev->corr[i].coef[3] = (1 << 29) / t; | |
872 | ||
987a6c02 DM |
873 | joydev->abs[i] = |
874 | joydev_correct(input_abs_get_val(dev, j), | |
875 | joydev->corr + i); | |
b126207c | 876 | } |
1da177e4 LT |
877 | } |
878 | ||
b126207c | 879 | joydev->dev.devt = MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor); |
9657d75c DT |
880 | joydev->dev.class = &input_class; |
881 | joydev->dev.parent = &dev->dev; | |
9657d75c DT |
882 | joydev->dev.release = joydev_free; |
883 | device_initialize(&joydev->dev); | |
5b2a0826 | 884 | |
b126207c | 885 | error = input_register_handle(&joydev->handle); |
5b2a0826 | 886 | if (error) |
9657d75c | 887 | goto err_free_joydev; |
5b2a0826 | 888 | |
b126207c | 889 | error = joydev_install_chrdev(joydev); |
5b2a0826 | 890 | if (error) |
b126207c DT |
891 | goto err_unregister_handle; |
892 | ||
893 | error = device_add(&joydev->dev); | |
894 | if (error) | |
895 | goto err_cleanup_joydev; | |
5b2a0826 DT |
896 | |
897 | return 0; | |
1da177e4 | 898 | |
b126207c DT |
899 | err_cleanup_joydev: |
900 | joydev_cleanup(joydev); | |
901 | err_unregister_handle: | |
902 | input_unregister_handle(&joydev->handle); | |
5b2a0826 | 903 | err_free_joydev: |
9657d75c | 904 | put_device(&joydev->dev); |
5b2a0826 | 905 | return error; |
1da177e4 LT |
906 | } |
907 | ||
908 | static void joydev_disconnect(struct input_handle *handle) | |
909 | { | |
910 | struct joydev *joydev = handle->private; | |
1da177e4 | 911 | |
9657d75c | 912 | device_del(&joydev->dev); |
b126207c DT |
913 | joydev_cleanup(joydev); |
914 | input_unregister_handle(handle); | |
9657d75c | 915 | put_device(&joydev->dev); |
1da177e4 LT |
916 | } |
917 | ||
66e66118 | 918 | static const struct input_device_id joydev_ids[] = { |
1da177e4 | 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_X) }, | |
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_WHEEL) }, | |
1da177e4 LT |
930 | }, |
931 | { | |
b126207c DT |
932 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
933 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
934 | .evbit = { BIT_MASK(EV_ABS) }, |
935 | .absbit = { BIT_MASK(ABS_THROTTLE) }, | |
1da177e4 | 936 | }, |
26a6931b CF |
937 | { |
938 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
939 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
940 | .evbit = { BIT_MASK(EV_KEY) }, | |
941 | .keybit = {[BIT_WORD(BTN_JOYSTICK)] = BIT_MASK(BTN_JOYSTICK) }, | |
942 | }, | |
943 | { | |
944 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
945 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
946 | .evbit = { BIT_MASK(EV_KEY) }, | |
947 | .keybit = { [BIT_WORD(BTN_GAMEPAD)] = BIT_MASK(BTN_GAMEPAD) }, | |
948 | }, | |
949 | { | |
950 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
951 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
952 | .evbit = { BIT_MASK(EV_KEY) }, | |
953 | .keybit = { [BIT_WORD(BTN_TRIGGER_HAPPY)] = BIT_MASK(BTN_TRIGGER_HAPPY) }, | |
954 | }, | |
1e0afb28 | 955 | { } /* Terminating entry */ |
1da177e4 LT |
956 | }; |
957 | ||
958 | MODULE_DEVICE_TABLE(input, joydev_ids); | |
959 | ||
960 | static struct input_handler joydev_handler = { | |
b126207c | 961 | .event = joydev_event, |
0b7024ac | 962 | .match = joydev_match, |
b126207c DT |
963 | .connect = joydev_connect, |
964 | .disconnect = joydev_disconnect, | |
965 | .fops = &joydev_fops, | |
966 | .minor = JOYDEV_MINOR_BASE, | |
967 | .name = "joydev", | |
968 | .id_table = joydev_ids, | |
1da177e4 LT |
969 | }; |
970 | ||
971 | static int __init joydev_init(void) | |
972 | { | |
4263cf0f | 973 | return input_register_handler(&joydev_handler); |
1da177e4 LT |
974 | } |
975 | ||
976 | static void __exit joydev_exit(void) | |
977 | { | |
978 | input_unregister_handler(&joydev_handler); | |
979 | } | |
980 | ||
981 | module_init(joydev_init); | |
982 | module_exit(joydev_exit); |