]>
Commit | Line | Data |
---|---|---|
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); | |
82ba56c2 | 183 | synchronize_rcu(); |
b126207c DT |
184 | } |
185 | ||
186 | static void joydev_detach_client(struct joydev *joydev, | |
187 | struct joydev_client *client) | |
188 | { | |
189 | spin_lock(&joydev->client_lock); | |
190 | list_del_rcu(&client->node); | |
191 | spin_unlock(&joydev->client_lock); | |
82ba56c2 | 192 | synchronize_rcu(); |
b126207c DT |
193 | } |
194 | ||
195 | static int joydev_open_device(struct joydev *joydev) | |
196 | { | |
197 | int retval; | |
198 | ||
199 | retval = mutex_lock_interruptible(&joydev->mutex); | |
200 | if (retval) | |
201 | return retval; | |
202 | ||
203 | if (!joydev->exist) | |
204 | retval = -ENODEV; | |
06445014 | 205 | else if (!joydev->open++) { |
b126207c | 206 | retval = input_open_device(&joydev->handle); |
06445014 ON |
207 | if (retval) |
208 | joydev->open--; | |
209 | } | |
b126207c DT |
210 | |
211 | mutex_unlock(&joydev->mutex); | |
212 | return retval; | |
213 | } | |
214 | ||
215 | static void joydev_close_device(struct joydev *joydev) | |
216 | { | |
217 | mutex_lock(&joydev->mutex); | |
218 | ||
219 | if (joydev->exist && !--joydev->open) | |
220 | input_close_device(&joydev->handle); | |
221 | ||
222 | mutex_unlock(&joydev->mutex); | |
223 | } | |
224 | ||
225 | /* | |
226 | * Wake up users waiting for IO so they can disconnect from | |
227 | * dead device. | |
228 | */ | |
229 | static void joydev_hangup(struct joydev *joydev) | |
230 | { | |
231 | struct joydev_client *client; | |
232 | ||
233 | spin_lock(&joydev->client_lock); | |
234 | list_for_each_entry(client, &joydev->client_list, node) | |
235 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
236 | spin_unlock(&joydev->client_lock); | |
237 | ||
238 | wake_up_interruptible(&joydev->wait); | |
239 | } | |
240 | ||
d0ffb9be | 241 | static int joydev_release(struct inode *inode, struct file *file) |
1da177e4 | 242 | { |
d0ffb9be DT |
243 | struct joydev_client *client = file->private_data; |
244 | struct joydev *joydev = client->joydev; | |
1da177e4 | 245 | |
b126207c | 246 | joydev_detach_client(joydev, client); |
d0ffb9be | 247 | kfree(client); |
1da177e4 | 248 | |
b126207c | 249 | joydev_close_device(joydev); |
9657d75c | 250 | put_device(&joydev->dev); |
1da177e4 | 251 | |
1da177e4 LT |
252 | return 0; |
253 | } | |
254 | ||
255 | static int joydev_open(struct inode *inode, struct file *file) | |
256 | { | |
d0ffb9be DT |
257 | struct joydev_client *client; |
258 | struct joydev *joydev; | |
1da177e4 | 259 | int i = iminor(inode) - JOYDEV_MINOR_BASE; |
d542ed82 | 260 | int error; |
1da177e4 | 261 | |
d0ffb9be DT |
262 | if (i >= JOYDEV_MINORS) |
263 | return -ENODEV; | |
1da177e4 | 264 | |
b126207c DT |
265 | error = mutex_lock_interruptible(&joydev_table_mutex); |
266 | if (error) | |
267 | return error; | |
d0ffb9be | 268 | joydev = joydev_table[i]; |
b126207c DT |
269 | if (joydev) |
270 | get_device(&joydev->dev); | |
271 | mutex_unlock(&joydev_table_mutex); | |
1da177e4 | 272 | |
b126207c DT |
273 | if (!joydev) |
274 | return -ENODEV; | |
9657d75c | 275 | |
d0ffb9be | 276 | client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL); |
9657d75c DT |
277 | if (!client) { |
278 | error = -ENOMEM; | |
279 | goto err_put_joydev; | |
280 | } | |
1da177e4 | 281 | |
b126207c | 282 | spin_lock_init(&client->buffer_lock); |
d0ffb9be | 283 | client->joydev = joydev; |
b126207c | 284 | joydev_attach_client(joydev, client); |
1da177e4 | 285 | |
b126207c DT |
286 | error = joydev_open_device(joydev); |
287 | if (error) | |
288 | goto err_free_client; | |
1da177e4 | 289 | |
d0ffb9be | 290 | file->private_data = client; |
3d7bbd45 DT |
291 | nonseekable_open(inode, file); |
292 | ||
1da177e4 | 293 | return 0; |
9657d75c DT |
294 | |
295 | err_free_client: | |
b126207c | 296 | joydev_detach_client(joydev, client); |
9657d75c DT |
297 | kfree(client); |
298 | err_put_joydev: | |
299 | put_device(&joydev->dev); | |
300 | return error; | |
1da177e4 LT |
301 | } |
302 | ||
b126207c DT |
303 | static int joydev_generate_startup_event(struct joydev_client *client, |
304 | struct input_dev *input, | |
305 | struct js_event *event) | |
1da177e4 | 306 | { |
b126207c DT |
307 | struct joydev *joydev = client->joydev; |
308 | int have_event; | |
309 | ||
310 | spin_lock_irq(&client->buffer_lock); | |
311 | ||
312 | have_event = client->startup < joydev->nabs + joydev->nkey; | |
313 | ||
314 | if (have_event) { | |
315 | ||
316 | event->time = jiffies_to_msecs(jiffies); | |
317 | if (client->startup < joydev->nkey) { | |
318 | event->type = JS_EVENT_BUTTON | JS_EVENT_INIT; | |
319 | event->number = client->startup; | |
320 | event->value = !!test_bit(joydev->keypam[event->number], | |
321 | input->key); | |
322 | } else { | |
323 | event->type = JS_EVENT_AXIS | JS_EVENT_INIT; | |
324 | event->number = client->startup - joydev->nkey; | |
325 | event->value = joydev->abs[event->number]; | |
326 | } | |
327 | client->startup++; | |
328 | } | |
329 | ||
330 | spin_unlock_irq(&client->buffer_lock); | |
331 | ||
332 | return have_event; | |
333 | } | |
334 | ||
335 | static int joydev_fetch_next_event(struct joydev_client *client, | |
336 | struct js_event *event) | |
337 | { | |
338 | int have_event; | |
339 | ||
340 | spin_lock_irq(&client->buffer_lock); | |
341 | ||
342 | have_event = client->head != client->tail; | |
343 | if (have_event) { | |
344 | *event = client->buffer[client->tail++]; | |
345 | client->tail &= JOYDEV_BUFFER_SIZE - 1; | |
346 | } | |
347 | ||
348 | spin_unlock_irq(&client->buffer_lock); | |
349 | ||
350 | return have_event; | |
351 | } | |
352 | ||
353 | /* | |
354 | * Old joystick interface | |
355 | */ | |
356 | static ssize_t joydev_0x_read(struct joydev_client *client, | |
357 | struct input_dev *input, | |
358 | char __user *buf) | |
359 | { | |
360 | struct joydev *joydev = client->joydev; | |
361 | struct JS_DATA_TYPE data; | |
362 | int i; | |
363 | ||
364 | spin_lock_irq(&input->event_lock); | |
365 | ||
366 | /* | |
367 | * Get device state | |
368 | */ | |
369 | for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++) | |
370 | data.buttons |= | |
371 | test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0; | |
372 | data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x; | |
373 | data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y; | |
374 | ||
375 | /* | |
376 | * Reset reader's event queue | |
377 | */ | |
378 | spin_lock(&client->buffer_lock); | |
379 | client->startup = 0; | |
380 | client->tail = client->head; | |
381 | spin_unlock(&client->buffer_lock); | |
382 | ||
383 | spin_unlock_irq(&input->event_lock); | |
384 | ||
385 | if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE))) | |
386 | return -EFAULT; | |
387 | ||
388 | return sizeof(struct JS_DATA_TYPE); | |
1da177e4 LT |
389 | } |
390 | ||
b126207c DT |
391 | static inline int joydev_data_pending(struct joydev_client *client) |
392 | { | |
393 | struct joydev *joydev = client->joydev; | |
394 | ||
395 | return client->startup < joydev->nabs + joydev->nkey || | |
396 | client->head != client->tail; | |
397 | } | |
398 | ||
399 | static ssize_t joydev_read(struct file *file, char __user *buf, | |
400 | size_t count, loff_t *ppos) | |
1da177e4 | 401 | { |
d0ffb9be DT |
402 | struct joydev_client *client = file->private_data; |
403 | struct joydev *joydev = client->joydev; | |
1da177e4 | 404 | struct input_dev *input = joydev->handle.dev; |
b126207c DT |
405 | struct js_event event; |
406 | int retval; | |
1da177e4 | 407 | |
d0ffb9be | 408 | if (!joydev->exist) |
1da177e4 LT |
409 | return -ENODEV; |
410 | ||
411 | if (count < sizeof(struct js_event)) | |
412 | return -EINVAL; | |
413 | ||
b126207c DT |
414 | if (count == sizeof(struct JS_DATA_TYPE)) |
415 | return joydev_0x_read(client, input, buf); | |
1da177e4 | 416 | |
b126207c | 417 | if (!joydev_data_pending(client) && (file->f_flags & O_NONBLOCK)) |
1e0afb28 | 418 | return -EAGAIN; |
1da177e4 | 419 | |
d0ffb9be | 420 | retval = wait_event_interruptible(joydev->wait, |
b126207c | 421 | !joydev->exist || joydev_data_pending(client)); |
1da177e4 LT |
422 | if (retval) |
423 | return retval; | |
424 | ||
d0ffb9be | 425 | if (!joydev->exist) |
1da177e4 LT |
426 | return -ENODEV; |
427 | ||
b126207c DT |
428 | while (retval + sizeof(struct js_event) <= count && |
429 | joydev_generate_startup_event(client, input, &event)) { | |
1da177e4 LT |
430 | |
431 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) | |
432 | return -EFAULT; | |
433 | ||
1da177e4 LT |
434 | retval += sizeof(struct js_event); |
435 | } | |
436 | ||
b126207c DT |
437 | while (retval + sizeof(struct js_event) <= count && |
438 | joydev_fetch_next_event(client, &event)) { | |
1da177e4 | 439 | |
b126207c | 440 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) |
1da177e4 LT |
441 | return -EFAULT; |
442 | ||
1da177e4 LT |
443 | retval += sizeof(struct js_event); |
444 | } | |
445 | ||
446 | return retval; | |
447 | } | |
448 | ||
449 | /* No kernel lock - fine */ | |
450 | static unsigned int joydev_poll(struct file *file, poll_table *wait) | |
451 | { | |
d0ffb9be DT |
452 | struct joydev_client *client = file->private_data; |
453 | struct joydev *joydev = client->joydev; | |
1e0afb28 | 454 | |
d0ffb9be | 455 | poll_wait(file, &joydev->wait, wait); |
b126207c DT |
456 | return (joydev_data_pending(client) ? (POLLIN | POLLRDNORM) : 0) | |
457 | (joydev->exist ? 0 : (POLLHUP | POLLERR)); | |
1da177e4 LT |
458 | } |
459 | ||
999b874f SK |
460 | static int joydev_handle_JSIOCSAXMAP(struct joydev *joydev, |
461 | void __user *argp, size_t len) | |
462 | { | |
463 | __u8 *abspam; | |
464 | int i; | |
465 | int retval = 0; | |
466 | ||
467 | len = min(len, sizeof(joydev->abspam)); | |
468 | ||
469 | /* Validate the map. */ | |
470 | abspam = kmalloc(len, GFP_KERNEL); | |
471 | if (!abspam) | |
472 | return -ENOMEM; | |
473 | ||
474 | if (copy_from_user(abspam, argp, len)) { | |
475 | retval = -EFAULT; | |
476 | goto out; | |
477 | } | |
478 | ||
479 | for (i = 0; i < joydev->nabs; i++) { | |
480 | if (abspam[i] > ABS_MAX) { | |
481 | retval = -EINVAL; | |
482 | goto out; | |
483 | } | |
484 | } | |
485 | ||
486 | memcpy(joydev->abspam, abspam, len); | |
487 | ||
d2520a42 KW |
488 | for (i = 0; i < joydev->nabs; i++) |
489 | joydev->absmap[joydev->abspam[i]] = i; | |
490 | ||
999b874f SK |
491 | out: |
492 | kfree(abspam); | |
493 | return retval; | |
494 | } | |
495 | ||
496 | static int joydev_handle_JSIOCSBTNMAP(struct joydev *joydev, | |
497 | void __user *argp, size_t len) | |
498 | { | |
499 | __u16 *keypam; | |
500 | int i; | |
501 | int retval = 0; | |
502 | ||
503 | len = min(len, sizeof(joydev->keypam)); | |
504 | ||
505 | /* Validate the map. */ | |
506 | keypam = kmalloc(len, GFP_KERNEL); | |
507 | if (!keypam) | |
508 | return -ENOMEM; | |
509 | ||
510 | if (copy_from_user(keypam, argp, len)) { | |
511 | retval = -EFAULT; | |
512 | goto out; | |
513 | } | |
514 | ||
515 | for (i = 0; i < joydev->nkey; i++) { | |
516 | if (keypam[i] > KEY_MAX || keypam[i] < BTN_MISC) { | |
517 | retval = -EINVAL; | |
518 | goto out; | |
519 | } | |
520 | } | |
521 | ||
522 | memcpy(joydev->keypam, keypam, len); | |
523 | ||
524 | for (i = 0; i < joydev->nkey; i++) | |
525 | joydev->keymap[keypam[i] - BTN_MISC] = i; | |
526 | ||
527 | out: | |
528 | kfree(keypam); | |
529 | return retval; | |
530 | } | |
531 | ||
532 | ||
b126207c DT |
533 | static int joydev_ioctl_common(struct joydev *joydev, |
534 | unsigned int cmd, void __user *argp) | |
1da177e4 | 535 | { |
1da177e4 | 536 | struct input_dev *dev = joydev->handle.dev; |
ec8b4b70 | 537 | size_t len; |
987a6c02 | 538 | int i; |
ec8b4b70 | 539 | const char *name; |
1da177e4 | 540 | |
ec8b4b70 | 541 | /* Process fixed-sized commands. */ |
1da177e4 LT |
542 | switch (cmd) { |
543 | ||
b126207c DT |
544 | case JS_SET_CAL: |
545 | return copy_from_user(&joydev->glue.JS_CORR, argp, | |
024ac44c | 546 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 547 | |
b126207c DT |
548 | case JS_GET_CAL: |
549 | return copy_to_user(argp, &joydev->glue.JS_CORR, | |
024ac44c | 550 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 551 | |
b126207c DT |
552 | case JS_SET_TIMEOUT: |
553 | return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1e0afb28 | 554 | |
b126207c DT |
555 | case JS_GET_TIMEOUT: |
556 | return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1da177e4 | 557 | |
b126207c DT |
558 | case JSIOCGVERSION: |
559 | return put_user(JS_VERSION, (__u32 __user *) argp); | |
1e0afb28 | 560 | |
b126207c DT |
561 | case JSIOCGAXES: |
562 | return put_user(joydev->nabs, (__u8 __user *) argp); | |
1e0afb28 | 563 | |
b126207c DT |
564 | case JSIOCGBUTTONS: |
565 | return put_user(joydev->nkey, (__u8 __user *) argp); | |
1e0afb28 | 566 | |
b126207c DT |
567 | case JSIOCSCORR: |
568 | if (copy_from_user(joydev->corr, argp, | |
569 | sizeof(joydev->corr[0]) * joydev->nabs)) | |
987a6c02 | 570 | return -EFAULT; |
1e0afb28 | 571 | |
b126207c | 572 | for (i = 0; i < joydev->nabs; i++) { |
987a6c02 DM |
573 | int val = input_abs_get_val(dev, joydev->abspam[i]); |
574 | joydev->abs[i] = joydev_correct(val, &joydev->corr[i]); | |
b126207c DT |
575 | } |
576 | return 0; | |
1e0afb28 | 577 | |
b126207c DT |
578 | case JSIOCGCORR: |
579 | return copy_to_user(argp, joydev->corr, | |
580 | sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0; | |
581 | ||
ec8b4b70 SK |
582 | } |
583 | ||
584 | /* | |
585 | * Process variable-sized commands (the axis and button map commands | |
586 | * are considered variable-sized to decouple them from the values of | |
587 | * ABS_MAX and KEY_MAX). | |
588 | */ | |
589 | switch (cmd & ~IOCSIZE_MASK) { | |
590 | ||
591 | case (JSIOCSAXMAP & ~IOCSIZE_MASK): | |
999b874f | 592 | return joydev_handle_JSIOCSAXMAP(joydev, argp, _IOC_SIZE(cmd)); |
b126207c | 593 | |
ec8b4b70 SK |
594 | case (JSIOCGAXMAP & ~IOCSIZE_MASK): |
595 | len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->abspam)); | |
999b874f | 596 | return copy_to_user(argp, joydev->abspam, len) ? -EFAULT : len; |
ec8b4b70 SK |
597 | |
598 | case (JSIOCSBTNMAP & ~IOCSIZE_MASK): | |
999b874f | 599 | return joydev_handle_JSIOCSBTNMAP(joydev, argp, _IOC_SIZE(cmd)); |
b126207c | 600 | |
ec8b4b70 SK |
601 | case (JSIOCGBTNMAP & ~IOCSIZE_MASK): |
602 | len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->keypam)); | |
999b874f | 603 | return copy_to_user(argp, joydev->keypam, len) ? -EFAULT : len; |
b126207c | 604 | |
ec8b4b70 SK |
605 | case JSIOCGNAME(0): |
606 | name = dev->name; | |
607 | if (!name) | |
608 | return 0; | |
609 | ||
610 | len = min_t(size_t, _IOC_SIZE(cmd), strlen(name) + 1); | |
611 | return copy_to_user(argp, name, len) ? -EFAULT : len; | |
1da177e4 | 612 | } |
ec8b4b70 | 613 | |
1da177e4 LT |
614 | return -EINVAL; |
615 | } | |
616 | ||
024ac44c | 617 | #ifdef CONFIG_COMPAT |
b126207c DT |
618 | static long joydev_compat_ioctl(struct file *file, |
619 | unsigned int cmd, unsigned long arg) | |
024ac44c | 620 | { |
d0ffb9be DT |
621 | struct joydev_client *client = file->private_data; |
622 | struct joydev *joydev = client->joydev; | |
024ac44c JF |
623 | void __user *argp = (void __user *)arg; |
624 | s32 tmp32; | |
625 | struct JS_DATA_SAVE_TYPE_32 ds32; | |
b126207c | 626 | int retval; |
024ac44c | 627 | |
b126207c DT |
628 | retval = mutex_lock_interruptible(&joydev->mutex); |
629 | if (retval) | |
630 | return retval; | |
631 | ||
632 | if (!joydev->exist) { | |
633 | retval = -ENODEV; | |
634 | goto out; | |
635 | } | |
636 | ||
637 | switch (cmd) { | |
1e0afb28 | 638 | |
024ac44c | 639 | case JS_SET_TIMELIMIT: |
b126207c DT |
640 | retval = get_user(tmp32, (s32 __user *) arg); |
641 | if (retval == 0) | |
024ac44c JF |
642 | joydev->glue.JS_TIMELIMIT = tmp32; |
643 | break; | |
b126207c | 644 | |
024ac44c JF |
645 | case JS_GET_TIMELIMIT: |
646 | tmp32 = joydev->glue.JS_TIMELIMIT; | |
b126207c | 647 | retval = put_user(tmp32, (s32 __user *) arg); |
024ac44c JF |
648 | break; |
649 | ||
650 | case JS_SET_ALL: | |
b126207c DT |
651 | retval = copy_from_user(&ds32, argp, |
652 | sizeof(ds32)) ? -EFAULT : 0; | |
653 | if (retval == 0) { | |
024ac44c JF |
654 | joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT; |
655 | joydev->glue.BUSY = ds32.BUSY; | |
656 | joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME; | |
657 | joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT; | |
658 | joydev->glue.JS_SAVE = ds32.JS_SAVE; | |
659 | joydev->glue.JS_CORR = ds32.JS_CORR; | |
660 | } | |
661 | break; | |
662 | ||
663 | case JS_GET_ALL: | |
664 | ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT; | |
665 | ds32.BUSY = joydev->glue.BUSY; | |
666 | ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME; | |
667 | ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT; | |
668 | ds32.JS_SAVE = joydev->glue.JS_SAVE; | |
669 | ds32.JS_CORR = joydev->glue.JS_CORR; | |
670 | ||
b126207c | 671 | retval = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0; |
024ac44c JF |
672 | break; |
673 | ||
674 | default: | |
b126207c DT |
675 | retval = joydev_ioctl_common(joydev, cmd, argp); |
676 | break; | |
024ac44c | 677 | } |
b126207c DT |
678 | |
679 | out: | |
680 | mutex_unlock(&joydev->mutex); | |
681 | return retval; | |
024ac44c JF |
682 | } |
683 | #endif /* CONFIG_COMPAT */ | |
684 | ||
b126207c DT |
685 | static long joydev_ioctl(struct file *file, |
686 | unsigned int cmd, unsigned long arg) | |
024ac44c | 687 | { |
d0ffb9be DT |
688 | struct joydev_client *client = file->private_data; |
689 | struct joydev *joydev = client->joydev; | |
024ac44c | 690 | void __user *argp = (void __user *)arg; |
b126207c | 691 | int retval; |
024ac44c | 692 | |
b126207c DT |
693 | retval = mutex_lock_interruptible(&joydev->mutex); |
694 | if (retval) | |
695 | return retval; | |
024ac44c | 696 | |
b126207c DT |
697 | if (!joydev->exist) { |
698 | retval = -ENODEV; | |
699 | goto out; | |
024ac44c | 700 | } |
b126207c DT |
701 | |
702 | switch (cmd) { | |
703 | ||
704 | case JS_SET_TIMELIMIT: | |
705 | retval = get_user(joydev->glue.JS_TIMELIMIT, | |
706 | (long __user *) arg); | |
707 | break; | |
708 | ||
709 | case JS_GET_TIMELIMIT: | |
710 | retval = put_user(joydev->glue.JS_TIMELIMIT, | |
711 | (long __user *) arg); | |
712 | break; | |
713 | ||
714 | case JS_SET_ALL: | |
715 | retval = copy_from_user(&joydev->glue, argp, | |
716 | sizeof(joydev->glue)) ? -EFAULT: 0; | |
717 | break; | |
718 | ||
719 | case JS_GET_ALL: | |
720 | retval = copy_to_user(argp, &joydev->glue, | |
721 | sizeof(joydev->glue)) ? -EFAULT : 0; | |
722 | break; | |
723 | ||
724 | default: | |
725 | retval = joydev_ioctl_common(joydev, cmd, argp); | |
726 | break; | |
727 | } | |
728 | out: | |
729 | mutex_unlock(&joydev->mutex); | |
730 | return retval; | |
024ac44c JF |
731 | } |
732 | ||
66e66118 | 733 | static const struct file_operations joydev_fops = { |
b126207c DT |
734 | .owner = THIS_MODULE, |
735 | .read = joydev_read, | |
736 | .poll = joydev_poll, | |
737 | .open = joydev_open, | |
738 | .release = joydev_release, | |
739 | .unlocked_ioctl = joydev_ioctl, | |
024ac44c | 740 | #ifdef CONFIG_COMPAT |
b126207c | 741 | .compat_ioctl = joydev_compat_ioctl, |
024ac44c | 742 | #endif |
b126207c | 743 | .fasync = joydev_fasync, |
6038f373 | 744 | .llseek = no_llseek, |
1da177e4 LT |
745 | }; |
746 | ||
b126207c DT |
747 | static int joydev_install_chrdev(struct joydev *joydev) |
748 | { | |
749 | joydev_table[joydev->minor] = joydev; | |
750 | return 0; | |
751 | } | |
752 | ||
753 | static void joydev_remove_chrdev(struct joydev *joydev) | |
754 | { | |
755 | mutex_lock(&joydev_table_mutex); | |
756 | joydev_table[joydev->minor] = NULL; | |
757 | mutex_unlock(&joydev_table_mutex); | |
758 | } | |
759 | ||
760 | /* | |
761 | * Mark device non-existant. This disables writes, ioctls and | |
762 | * prevents new users from opening the device. Already posted | |
763 | * blocking reads will stay, however new ones will fail. | |
764 | */ | |
765 | static void joydev_mark_dead(struct joydev *joydev) | |
766 | { | |
767 | mutex_lock(&joydev->mutex); | |
20da92de | 768 | joydev->exist = false; |
b126207c DT |
769 | mutex_unlock(&joydev->mutex); |
770 | } | |
771 | ||
772 | static void joydev_cleanup(struct joydev *joydev) | |
773 | { | |
774 | struct input_handle *handle = &joydev->handle; | |
775 | ||
776 | joydev_mark_dead(joydev); | |
777 | joydev_hangup(joydev); | |
778 | joydev_remove_chrdev(joydev); | |
779 | ||
780 | /* joydev is marked dead so noone else accesses joydev->open */ | |
781 | if (joydev->open) | |
782 | input_close_device(handle); | |
783 | } | |
784 | ||
0b7024ac DT |
785 | |
786 | static bool joydev_match(struct input_handler *handler, struct input_dev *dev) | |
787 | { | |
788 | /* Avoid touchpads and touchscreens */ | |
789 | if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_TOUCH, dev->keybit)) | |
790 | return false; | |
791 | ||
792 | /* Avoid tablets, digitisers and similar devices */ | |
793 | if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_DIGI, dev->keybit)) | |
794 | return false; | |
795 | ||
796 | return true; | |
797 | } | |
798 | ||
5b2a0826 DT |
799 | static int joydev_connect(struct input_handler *handler, struct input_dev *dev, |
800 | const struct input_device_id *id) | |
1da177e4 LT |
801 | { |
802 | struct joydev *joydev; | |
803 | int i, j, t, minor; | |
5b2a0826 | 804 | int error; |
1da177e4 | 805 | |
b126207c DT |
806 | for (minor = 0; minor < JOYDEV_MINORS; minor++) |
807 | if (!joydev_table[minor]) | |
808 | break; | |
809 | ||
1da177e4 | 810 | if (minor == JOYDEV_MINORS) { |
da0c4901 | 811 | pr_err("no more free joydev devices\n"); |
5b2a0826 | 812 | return -ENFILE; |
1da177e4 LT |
813 | } |
814 | ||
5b2a0826 DT |
815 | joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL); |
816 | if (!joydev) | |
817 | return -ENOMEM; | |
1da177e4 | 818 | |
d0ffb9be | 819 | INIT_LIST_HEAD(&joydev->client_list); |
b126207c DT |
820 | spin_lock_init(&joydev->client_lock); |
821 | mutex_init(&joydev->mutex); | |
1da177e4 LT |
822 | init_waitqueue_head(&joydev->wait); |
823 | ||
3d5cb60e | 824 | dev_set_name(&joydev->dev, "js%d", minor); |
20da92de | 825 | joydev->exist = true; |
1da177e4 | 826 | joydev->minor = minor; |
b126207c | 827 | |
a7097ff8 | 828 | joydev->handle.dev = input_get_device(dev); |
3d5cb60e | 829 | joydev->handle.name = dev_name(&joydev->dev); |
1da177e4 LT |
830 | joydev->handle.handler = handler; |
831 | joydev->handle.private = joydev; | |
1da177e4 | 832 | |
81c2a3ba | 833 | for (i = 0; i < ABS_CNT; i++) |
1da177e4 LT |
834 | if (test_bit(i, dev->absbit)) { |
835 | joydev->absmap[i] = joydev->nabs; | |
836 | joydev->abspam[joydev->nabs] = i; | |
837 | joydev->nabs++; | |
838 | } | |
839 | ||
840 | for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++) | |
841 | if (test_bit(i + BTN_MISC, dev->keybit)) { | |
842 | joydev->keymap[i] = joydev->nkey; | |
843 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
844 | joydev->nkey++; | |
845 | } | |
846 | ||
f24949e8 | 847 | for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++) |
1da177e4 LT |
848 | if (test_bit(i + BTN_MISC, dev->keybit)) { |
849 | joydev->keymap[i] = joydev->nkey; | |
850 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
851 | joydev->nkey++; | |
852 | } | |
853 | ||
854 | for (i = 0; i < joydev->nabs; i++) { | |
855 | j = joydev->abspam[i]; | |
987a6c02 | 856 | if (input_abs_get_max(dev, j) == input_abs_get_min(dev, j)) { |
1da177e4 | 857 | joydev->corr[i].type = JS_CORR_NONE; |
987a6c02 | 858 | joydev->abs[i] = input_abs_get_val(dev, j); |
1da177e4 LT |
859 | continue; |
860 | } | |
861 | joydev->corr[i].type = JS_CORR_BROKEN; | |
987a6c02 DM |
862 | joydev->corr[i].prec = input_abs_get_fuzz(dev, j); |
863 | ||
864 | t = (input_abs_get_max(dev, j) + input_abs_get_min(dev, j)) / 2; | |
865 | joydev->corr[i].coef[0] = t - input_abs_get_flat(dev, j); | |
866 | joydev->corr[i].coef[1] = t + input_abs_get_flat(dev, j); | |
b126207c | 867 | |
987a6c02 DM |
868 | t = (input_abs_get_max(dev, j) - input_abs_get_min(dev, j)) / 2 |
869 | - 2 * input_abs_get_flat(dev, j); | |
b126207c DT |
870 | if (t) { |
871 | joydev->corr[i].coef[2] = (1 << 29) / t; | |
872 | joydev->corr[i].coef[3] = (1 << 29) / t; | |
873 | ||
987a6c02 DM |
874 | joydev->abs[i] = |
875 | joydev_correct(input_abs_get_val(dev, j), | |
876 | joydev->corr + i); | |
b126207c | 877 | } |
1da177e4 LT |
878 | } |
879 | ||
b126207c | 880 | joydev->dev.devt = MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor); |
9657d75c DT |
881 | joydev->dev.class = &input_class; |
882 | joydev->dev.parent = &dev->dev; | |
9657d75c DT |
883 | joydev->dev.release = joydev_free; |
884 | device_initialize(&joydev->dev); | |
5b2a0826 | 885 | |
b126207c | 886 | error = input_register_handle(&joydev->handle); |
5b2a0826 | 887 | if (error) |
9657d75c | 888 | goto err_free_joydev; |
5b2a0826 | 889 | |
b126207c | 890 | error = joydev_install_chrdev(joydev); |
5b2a0826 | 891 | if (error) |
b126207c DT |
892 | goto err_unregister_handle; |
893 | ||
894 | error = device_add(&joydev->dev); | |
895 | if (error) | |
896 | goto err_cleanup_joydev; | |
5b2a0826 DT |
897 | |
898 | return 0; | |
1da177e4 | 899 | |
b126207c DT |
900 | err_cleanup_joydev: |
901 | joydev_cleanup(joydev); | |
902 | err_unregister_handle: | |
903 | input_unregister_handle(&joydev->handle); | |
5b2a0826 | 904 | err_free_joydev: |
9657d75c | 905 | put_device(&joydev->dev); |
5b2a0826 | 906 | return error; |
1da177e4 LT |
907 | } |
908 | ||
909 | static void joydev_disconnect(struct input_handle *handle) | |
910 | { | |
911 | struct joydev *joydev = handle->private; | |
1da177e4 | 912 | |
9657d75c | 913 | device_del(&joydev->dev); |
b126207c DT |
914 | joydev_cleanup(joydev); |
915 | input_unregister_handle(handle); | |
9657d75c | 916 | put_device(&joydev->dev); |
1da177e4 LT |
917 | } |
918 | ||
66e66118 | 919 | static const struct input_device_id joydev_ids[] = { |
1da177e4 | 920 | { |
b126207c DT |
921 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
922 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
923 | .evbit = { BIT_MASK(EV_ABS) }, |
924 | .absbit = { BIT_MASK(ABS_X) }, | |
1da177e4 LT |
925 | }, |
926 | { | |
b126207c DT |
927 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
928 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
929 | .evbit = { BIT_MASK(EV_ABS) }, |
930 | .absbit = { BIT_MASK(ABS_WHEEL) }, | |
1da177e4 LT |
931 | }, |
932 | { | |
b126207c DT |
933 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
934 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
935 | .evbit = { BIT_MASK(EV_ABS) }, |
936 | .absbit = { BIT_MASK(ABS_THROTTLE) }, | |
1da177e4 | 937 | }, |
26a6931b CF |
938 | { |
939 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
940 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
941 | .evbit = { BIT_MASK(EV_KEY) }, | |
942 | .keybit = {[BIT_WORD(BTN_JOYSTICK)] = BIT_MASK(BTN_JOYSTICK) }, | |
943 | }, | |
944 | { | |
945 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
946 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
947 | .evbit = { BIT_MASK(EV_KEY) }, | |
948 | .keybit = { [BIT_WORD(BTN_GAMEPAD)] = BIT_MASK(BTN_GAMEPAD) }, | |
949 | }, | |
950 | { | |
951 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
952 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
953 | .evbit = { BIT_MASK(EV_KEY) }, | |
954 | .keybit = { [BIT_WORD(BTN_TRIGGER_HAPPY)] = BIT_MASK(BTN_TRIGGER_HAPPY) }, | |
955 | }, | |
1e0afb28 | 956 | { } /* Terminating entry */ |
1da177e4 LT |
957 | }; |
958 | ||
959 | MODULE_DEVICE_TABLE(input, joydev_ids); | |
960 | ||
961 | static struct input_handler joydev_handler = { | |
b126207c | 962 | .event = joydev_event, |
0b7024ac | 963 | .match = joydev_match, |
b126207c DT |
964 | .connect = joydev_connect, |
965 | .disconnect = joydev_disconnect, | |
966 | .fops = &joydev_fops, | |
967 | .minor = JOYDEV_MINOR_BASE, | |
968 | .name = "joydev", | |
969 | .id_table = joydev_ids, | |
1da177e4 LT |
970 | }; |
971 | ||
972 | static int __init joydev_init(void) | |
973 | { | |
4263cf0f | 974 | return input_register_handler(&joydev_handler); |
1da177e4 LT |
975 | } |
976 | ||
977 | static void __exit joydev_exit(void) | |
978 | { | |
979 | input_unregister_handler(&joydev_handler); | |
980 | } | |
981 | ||
982 | module_init(joydev_init); | |
983 | module_exit(joydev_exit); |