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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Joystick device driver for the input driver suite. | |
3 | * | |
4 | * Copyright (c) 1999-2002 Vojtech Pavlik | |
5 | * Copyright (c) 1999 Colin Van Dyke | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | */ | |
12 | ||
13 | #include <asm/io.h> | |
14 | #include <asm/system.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/errno.h> | |
17 | #include <linux/joystick.h> | |
18 | #include <linux/input.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/major.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/mm.h> | |
23 | #include <linux/miscdevice.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/poll.h> | |
26 | #include <linux/init.h> | |
1da177e4 | 27 | #include <linux/device.h> |
1da177e4 LT |
28 | |
29 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
30 | MODULE_DESCRIPTION("Joystick device interfaces"); | |
31 | MODULE_SUPPORTED_DEVICE("input/js"); | |
32 | MODULE_LICENSE("GPL"); | |
33 | ||
34 | #define JOYDEV_MINOR_BASE 0 | |
35 | #define JOYDEV_MINORS 16 | |
36 | #define JOYDEV_BUFFER_SIZE 64 | |
37 | ||
1da177e4 LT |
38 | struct joydev { |
39 | int exist; | |
40 | int open; | |
41 | int minor; | |
42 | char name[16]; | |
43 | struct input_handle handle; | |
44 | wait_queue_head_t wait; | |
d0ffb9be | 45 | struct list_head client_list; |
b126207c DT |
46 | spinlock_t client_lock; /* protects client_list */ |
47 | struct mutex mutex; | |
9657d75c DT |
48 | struct device dev; |
49 | ||
1da177e4 LT |
50 | struct js_corr corr[ABS_MAX + 1]; |
51 | struct JS_DATA_SAVE_TYPE glue; | |
52 | int nabs; | |
53 | int nkey; | |
54 | __u16 keymap[KEY_MAX - BTN_MISC + 1]; | |
55 | __u16 keypam[KEY_MAX - BTN_MISC + 1]; | |
56 | __u8 absmap[ABS_MAX + 1]; | |
57 | __u8 abspam[ABS_MAX + 1]; | |
58 | __s16 abs[ABS_MAX + 1]; | |
59 | }; | |
60 | ||
d0ffb9be | 61 | struct joydev_client { |
1da177e4 LT |
62 | struct js_event buffer[JOYDEV_BUFFER_SIZE]; |
63 | int head; | |
64 | int tail; | |
65 | int startup; | |
b126207c | 66 | spinlock_t buffer_lock; /* protects access to buffer, head and tail */ |
1da177e4 LT |
67 | struct fasync_struct *fasync; |
68 | struct joydev *joydev; | |
69 | struct list_head node; | |
70 | }; | |
71 | ||
72 | static struct joydev *joydev_table[JOYDEV_MINORS]; | |
b126207c | 73 | static DEFINE_MUTEX(joydev_table_mutex); |
1da177e4 LT |
74 | |
75 | static int joydev_correct(int value, struct js_corr *corr) | |
76 | { | |
77 | switch (corr->type) { | |
b126207c DT |
78 | |
79 | case JS_CORR_NONE: | |
80 | break; | |
81 | ||
82 | case JS_CORR_BROKEN: | |
83 | value = value > corr->coef[0] ? (value < corr->coef[1] ? 0 : | |
84 | ((corr->coef[3] * (value - corr->coef[1])) >> 14)) : | |
85 | ((corr->coef[2] * (value - corr->coef[0])) >> 14); | |
86 | break; | |
87 | ||
88 | default: | |
89 | return 0; | |
1da177e4 LT |
90 | } |
91 | ||
1e0afb28 | 92 | return value < -32767 ? -32767 : (value > 32767 ? 32767 : value); |
1da177e4 LT |
93 | } |
94 | ||
b126207c DT |
95 | static void joydev_pass_event(struct joydev_client *client, |
96 | struct js_event *event) | |
97 | { | |
98 | struct joydev *joydev = client->joydev; | |
99 | ||
100 | /* | |
101 | * IRQs already disabled, just acquire the lock | |
102 | */ | |
103 | spin_lock(&client->buffer_lock); | |
104 | ||
105 | client->buffer[client->head] = *event; | |
106 | ||
107 | if (client->startup == joydev->nabs + joydev->nkey) { | |
108 | client->head++; | |
109 | client->head &= JOYDEV_BUFFER_SIZE - 1; | |
110 | if (client->tail == client->head) | |
111 | client->startup = 0; | |
112 | } | |
113 | ||
114 | spin_unlock(&client->buffer_lock); | |
115 | ||
116 | kill_fasync(&client->fasync, SIGIO, POLL_IN); | |
117 | } | |
118 | ||
119 | static void joydev_event(struct input_handle *handle, | |
120 | unsigned int type, unsigned int code, int value) | |
1da177e4 LT |
121 | { |
122 | struct joydev *joydev = handle->private; | |
d0ffb9be | 123 | struct joydev_client *client; |
1da177e4 LT |
124 | struct js_event event; |
125 | ||
126 | switch (type) { | |
127 | ||
b126207c DT |
128 | case EV_KEY: |
129 | if (code < BTN_MISC || value == 2) | |
130 | return; | |
131 | event.type = JS_EVENT_BUTTON; | |
132 | event.number = joydev->keymap[code - BTN_MISC]; | |
133 | event.value = value; | |
134 | break; | |
1da177e4 | 135 | |
b126207c DT |
136 | case EV_ABS: |
137 | event.type = JS_EVENT_AXIS; | |
138 | event.number = joydev->absmap[code]; | |
139 | event.value = joydev_correct(value, | |
140 | &joydev->corr[event.number]); | |
141 | if (event.value == joydev->abs[event.number]) | |
1da177e4 | 142 | return; |
b126207c DT |
143 | joydev->abs[event.number] = event.value; |
144 | break; | |
145 | ||
146 | default: | |
147 | return; | |
1da177e4 LT |
148 | } |
149 | ||
6f5eacfc | 150 | event.time = jiffies_to_msecs(jiffies); |
1da177e4 | 151 | |
82ba56c2 | 152 | rcu_read_lock(); |
b126207c DT |
153 | list_for_each_entry_rcu(client, &joydev->client_list, node) |
154 | joydev_pass_event(client, &event); | |
82ba56c2 | 155 | rcu_read_unlock(); |
1da177e4 LT |
156 | |
157 | wake_up_interruptible(&joydev->wait); | |
158 | } | |
159 | ||
160 | static int joydev_fasync(int fd, struct file *file, int on) | |
161 | { | |
d0ffb9be | 162 | struct joydev_client *client = file->private_data; |
1e0afb28 | 163 | |
60aa4924 | 164 | return fasync_helper(fd, file, on, &client->fasync); |
1da177e4 LT |
165 | } |
166 | ||
9657d75c | 167 | static void joydev_free(struct device *dev) |
1da177e4 | 168 | { |
9657d75c DT |
169 | struct joydev *joydev = container_of(dev, struct joydev, dev); |
170 | ||
a7097ff8 | 171 | input_put_device(joydev->handle.dev); |
1da177e4 LT |
172 | kfree(joydev); |
173 | } | |
174 | ||
b126207c DT |
175 | static void joydev_attach_client(struct joydev *joydev, |
176 | struct joydev_client *client) | |
177 | { | |
178 | spin_lock(&joydev->client_lock); | |
179 | list_add_tail_rcu(&client->node, &joydev->client_list); | |
180 | spin_unlock(&joydev->client_lock); | |
82ba56c2 | 181 | synchronize_rcu(); |
b126207c DT |
182 | } |
183 | ||
184 | static void joydev_detach_client(struct joydev *joydev, | |
185 | struct joydev_client *client) | |
186 | { | |
187 | spin_lock(&joydev->client_lock); | |
188 | list_del_rcu(&client->node); | |
189 | spin_unlock(&joydev->client_lock); | |
82ba56c2 | 190 | synchronize_rcu(); |
b126207c DT |
191 | } |
192 | ||
193 | static int joydev_open_device(struct joydev *joydev) | |
194 | { | |
195 | int retval; | |
196 | ||
197 | retval = mutex_lock_interruptible(&joydev->mutex); | |
198 | if (retval) | |
199 | return retval; | |
200 | ||
201 | if (!joydev->exist) | |
202 | retval = -ENODEV; | |
06445014 | 203 | else if (!joydev->open++) { |
b126207c | 204 | retval = input_open_device(&joydev->handle); |
06445014 ON |
205 | if (retval) |
206 | joydev->open--; | |
207 | } | |
b126207c DT |
208 | |
209 | mutex_unlock(&joydev->mutex); | |
210 | return retval; | |
211 | } | |
212 | ||
213 | static void joydev_close_device(struct joydev *joydev) | |
214 | { | |
215 | mutex_lock(&joydev->mutex); | |
216 | ||
217 | if (joydev->exist && !--joydev->open) | |
218 | input_close_device(&joydev->handle); | |
219 | ||
220 | mutex_unlock(&joydev->mutex); | |
221 | } | |
222 | ||
223 | /* | |
224 | * Wake up users waiting for IO so they can disconnect from | |
225 | * dead device. | |
226 | */ | |
227 | static void joydev_hangup(struct joydev *joydev) | |
228 | { | |
229 | struct joydev_client *client; | |
230 | ||
231 | spin_lock(&joydev->client_lock); | |
232 | list_for_each_entry(client, &joydev->client_list, node) | |
233 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
234 | spin_unlock(&joydev->client_lock); | |
235 | ||
236 | wake_up_interruptible(&joydev->wait); | |
237 | } | |
238 | ||
d0ffb9be | 239 | static int joydev_release(struct inode *inode, struct file *file) |
1da177e4 | 240 | { |
d0ffb9be DT |
241 | struct joydev_client *client = file->private_data; |
242 | struct joydev *joydev = client->joydev; | |
1da177e4 | 243 | |
b126207c | 244 | joydev_detach_client(joydev, client); |
d0ffb9be | 245 | kfree(client); |
1da177e4 | 246 | |
b126207c | 247 | joydev_close_device(joydev); |
9657d75c | 248 | put_device(&joydev->dev); |
1da177e4 | 249 | |
1da177e4 LT |
250 | return 0; |
251 | } | |
252 | ||
253 | static int joydev_open(struct inode *inode, struct file *file) | |
254 | { | |
d0ffb9be DT |
255 | struct joydev_client *client; |
256 | struct joydev *joydev; | |
1da177e4 | 257 | int i = iminor(inode) - JOYDEV_MINOR_BASE; |
d542ed82 | 258 | int error; |
1da177e4 | 259 | |
d0ffb9be DT |
260 | if (i >= JOYDEV_MINORS) |
261 | return -ENODEV; | |
1da177e4 | 262 | |
b126207c DT |
263 | error = mutex_lock_interruptible(&joydev_table_mutex); |
264 | if (error) | |
265 | return error; | |
d0ffb9be | 266 | joydev = joydev_table[i]; |
b126207c DT |
267 | if (joydev) |
268 | get_device(&joydev->dev); | |
269 | mutex_unlock(&joydev_table_mutex); | |
1da177e4 | 270 | |
b126207c DT |
271 | if (!joydev) |
272 | return -ENODEV; | |
9657d75c | 273 | |
d0ffb9be | 274 | client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL); |
9657d75c DT |
275 | if (!client) { |
276 | error = -ENOMEM; | |
277 | goto err_put_joydev; | |
278 | } | |
1da177e4 | 279 | |
b126207c | 280 | spin_lock_init(&client->buffer_lock); |
d0ffb9be | 281 | client->joydev = joydev; |
b126207c | 282 | joydev_attach_client(joydev, client); |
1da177e4 | 283 | |
b126207c DT |
284 | error = joydev_open_device(joydev); |
285 | if (error) | |
286 | goto err_free_client; | |
1da177e4 | 287 | |
d0ffb9be | 288 | file->private_data = client; |
1da177e4 | 289 | return 0; |
9657d75c DT |
290 | |
291 | err_free_client: | |
b126207c | 292 | joydev_detach_client(joydev, client); |
9657d75c DT |
293 | kfree(client); |
294 | err_put_joydev: | |
295 | put_device(&joydev->dev); | |
296 | return error; | |
1da177e4 LT |
297 | } |
298 | ||
b126207c DT |
299 | static int joydev_generate_startup_event(struct joydev_client *client, |
300 | struct input_dev *input, | |
301 | struct js_event *event) | |
1da177e4 | 302 | { |
b126207c DT |
303 | struct joydev *joydev = client->joydev; |
304 | int have_event; | |
305 | ||
306 | spin_lock_irq(&client->buffer_lock); | |
307 | ||
308 | have_event = client->startup < joydev->nabs + joydev->nkey; | |
309 | ||
310 | if (have_event) { | |
311 | ||
312 | event->time = jiffies_to_msecs(jiffies); | |
313 | if (client->startup < joydev->nkey) { | |
314 | event->type = JS_EVENT_BUTTON | JS_EVENT_INIT; | |
315 | event->number = client->startup; | |
316 | event->value = !!test_bit(joydev->keypam[event->number], | |
317 | input->key); | |
318 | } else { | |
319 | event->type = JS_EVENT_AXIS | JS_EVENT_INIT; | |
320 | event->number = client->startup - joydev->nkey; | |
321 | event->value = joydev->abs[event->number]; | |
322 | } | |
323 | client->startup++; | |
324 | } | |
325 | ||
326 | spin_unlock_irq(&client->buffer_lock); | |
327 | ||
328 | return have_event; | |
329 | } | |
330 | ||
331 | static int joydev_fetch_next_event(struct joydev_client *client, | |
332 | struct js_event *event) | |
333 | { | |
334 | int have_event; | |
335 | ||
336 | spin_lock_irq(&client->buffer_lock); | |
337 | ||
338 | have_event = client->head != client->tail; | |
339 | if (have_event) { | |
340 | *event = client->buffer[client->tail++]; | |
341 | client->tail &= JOYDEV_BUFFER_SIZE - 1; | |
342 | } | |
343 | ||
344 | spin_unlock_irq(&client->buffer_lock); | |
345 | ||
346 | return have_event; | |
347 | } | |
348 | ||
349 | /* | |
350 | * Old joystick interface | |
351 | */ | |
352 | static ssize_t joydev_0x_read(struct joydev_client *client, | |
353 | struct input_dev *input, | |
354 | char __user *buf) | |
355 | { | |
356 | struct joydev *joydev = client->joydev; | |
357 | struct JS_DATA_TYPE data; | |
358 | int i; | |
359 | ||
360 | spin_lock_irq(&input->event_lock); | |
361 | ||
362 | /* | |
363 | * Get device state | |
364 | */ | |
365 | for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++) | |
366 | data.buttons |= | |
367 | test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0; | |
368 | data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x; | |
369 | data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y; | |
370 | ||
371 | /* | |
372 | * Reset reader's event queue | |
373 | */ | |
374 | spin_lock(&client->buffer_lock); | |
375 | client->startup = 0; | |
376 | client->tail = client->head; | |
377 | spin_unlock(&client->buffer_lock); | |
378 | ||
379 | spin_unlock_irq(&input->event_lock); | |
380 | ||
381 | if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE))) | |
382 | return -EFAULT; | |
383 | ||
384 | return sizeof(struct JS_DATA_TYPE); | |
1da177e4 LT |
385 | } |
386 | ||
b126207c DT |
387 | static inline int joydev_data_pending(struct joydev_client *client) |
388 | { | |
389 | struct joydev *joydev = client->joydev; | |
390 | ||
391 | return client->startup < joydev->nabs + joydev->nkey || | |
392 | client->head != client->tail; | |
393 | } | |
394 | ||
395 | static ssize_t joydev_read(struct file *file, char __user *buf, | |
396 | size_t count, loff_t *ppos) | |
1da177e4 | 397 | { |
d0ffb9be DT |
398 | struct joydev_client *client = file->private_data; |
399 | struct joydev *joydev = client->joydev; | |
1da177e4 | 400 | struct input_dev *input = joydev->handle.dev; |
b126207c DT |
401 | struct js_event event; |
402 | int retval; | |
1da177e4 | 403 | |
d0ffb9be | 404 | if (!joydev->exist) |
1da177e4 LT |
405 | return -ENODEV; |
406 | ||
407 | if (count < sizeof(struct js_event)) | |
408 | return -EINVAL; | |
409 | ||
b126207c DT |
410 | if (count == sizeof(struct JS_DATA_TYPE)) |
411 | return joydev_0x_read(client, input, buf); | |
1da177e4 | 412 | |
b126207c | 413 | if (!joydev_data_pending(client) && (file->f_flags & O_NONBLOCK)) |
1e0afb28 | 414 | return -EAGAIN; |
1da177e4 | 415 | |
d0ffb9be | 416 | retval = wait_event_interruptible(joydev->wait, |
b126207c | 417 | !joydev->exist || joydev_data_pending(client)); |
1da177e4 LT |
418 | if (retval) |
419 | return retval; | |
420 | ||
d0ffb9be | 421 | if (!joydev->exist) |
1da177e4 LT |
422 | return -ENODEV; |
423 | ||
b126207c DT |
424 | while (retval + sizeof(struct js_event) <= count && |
425 | joydev_generate_startup_event(client, input, &event)) { | |
1da177e4 LT |
426 | |
427 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) | |
428 | return -EFAULT; | |
429 | ||
1da177e4 LT |
430 | retval += sizeof(struct js_event); |
431 | } | |
432 | ||
b126207c DT |
433 | while (retval + sizeof(struct js_event) <= count && |
434 | joydev_fetch_next_event(client, &event)) { | |
1da177e4 | 435 | |
b126207c | 436 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) |
1da177e4 LT |
437 | return -EFAULT; |
438 | ||
1da177e4 LT |
439 | retval += sizeof(struct js_event); |
440 | } | |
441 | ||
442 | return retval; | |
443 | } | |
444 | ||
445 | /* No kernel lock - fine */ | |
446 | static unsigned int joydev_poll(struct file *file, poll_table *wait) | |
447 | { | |
d0ffb9be DT |
448 | struct joydev_client *client = file->private_data; |
449 | struct joydev *joydev = client->joydev; | |
1e0afb28 | 450 | |
d0ffb9be | 451 | poll_wait(file, &joydev->wait, wait); |
b126207c DT |
452 | return (joydev_data_pending(client) ? (POLLIN | POLLRDNORM) : 0) | |
453 | (joydev->exist ? 0 : (POLLHUP | POLLERR)); | |
1da177e4 LT |
454 | } |
455 | ||
b126207c DT |
456 | static int joydev_ioctl_common(struct joydev *joydev, |
457 | unsigned int cmd, void __user *argp) | |
1da177e4 | 458 | { |
1da177e4 | 459 | struct input_dev *dev = joydev->handle.dev; |
1da177e4 LT |
460 | int i, j; |
461 | ||
1da177e4 LT |
462 | switch (cmd) { |
463 | ||
b126207c DT |
464 | case JS_SET_CAL: |
465 | return copy_from_user(&joydev->glue.JS_CORR, argp, | |
024ac44c | 466 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 467 | |
b126207c DT |
468 | case JS_GET_CAL: |
469 | return copy_to_user(argp, &joydev->glue.JS_CORR, | |
024ac44c | 470 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 471 | |
b126207c DT |
472 | case JS_SET_TIMEOUT: |
473 | return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1e0afb28 | 474 | |
b126207c DT |
475 | case JS_GET_TIMEOUT: |
476 | return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1da177e4 | 477 | |
b126207c DT |
478 | case JSIOCGVERSION: |
479 | return put_user(JS_VERSION, (__u32 __user *) argp); | |
1e0afb28 | 480 | |
b126207c DT |
481 | case JSIOCGAXES: |
482 | return put_user(joydev->nabs, (__u8 __user *) argp); | |
1e0afb28 | 483 | |
b126207c DT |
484 | case JSIOCGBUTTONS: |
485 | return put_user(joydev->nkey, (__u8 __user *) argp); | |
1e0afb28 | 486 | |
b126207c DT |
487 | case JSIOCSCORR: |
488 | if (copy_from_user(joydev->corr, argp, | |
489 | sizeof(joydev->corr[0]) * joydev->nabs)) | |
490 | return -EFAULT; | |
1e0afb28 | 491 | |
b126207c DT |
492 | for (i = 0; i < joydev->nabs; i++) { |
493 | j = joydev->abspam[i]; | |
494 | joydev->abs[i] = joydev_correct(dev->abs[j], | |
495 | &joydev->corr[i]); | |
496 | } | |
497 | return 0; | |
1e0afb28 | 498 | |
b126207c DT |
499 | case JSIOCGCORR: |
500 | return copy_to_user(argp, joydev->corr, | |
501 | sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0; | |
502 | ||
503 | case JSIOCSAXMAP: | |
504 | if (copy_from_user(joydev->abspam, argp, | |
505 | sizeof(__u8) * (ABS_MAX + 1))) | |
506 | return -EFAULT; | |
507 | ||
508 | for (i = 0; i < joydev->nabs; i++) { | |
509 | if (joydev->abspam[i] > ABS_MAX) | |
510 | return -EINVAL; | |
511 | joydev->absmap[joydev->abspam[i]] = i; | |
512 | } | |
513 | return 0; | |
514 | ||
515 | case JSIOCGAXMAP: | |
516 | return copy_to_user(argp, joydev->abspam, | |
517 | sizeof(__u8) * (ABS_MAX + 1)) ? -EFAULT : 0; | |
518 | ||
519 | case JSIOCSBTNMAP: | |
520 | if (copy_from_user(joydev->keypam, argp, | |
521 | sizeof(__u16) * (KEY_MAX - BTN_MISC + 1))) | |
522 | return -EFAULT; | |
523 | ||
524 | for (i = 0; i < joydev->nkey; i++) { | |
525 | if (joydev->keypam[i] > KEY_MAX || | |
526 | joydev->keypam[i] < BTN_MISC) | |
527 | return -EINVAL; | |
528 | joydev->keymap[joydev->keypam[i] - BTN_MISC] = i; | |
529 | } | |
530 | ||
531 | return 0; | |
532 | ||
533 | case JSIOCGBTNMAP: | |
534 | return copy_to_user(argp, joydev->keypam, | |
535 | sizeof(__u16) * (KEY_MAX - BTN_MISC + 1)) ? -EFAULT : 0; | |
536 | ||
537 | default: | |
538 | if ((cmd & ~IOCSIZE_MASK) == JSIOCGNAME(0)) { | |
539 | int len; | |
540 | if (!dev->name) | |
541 | return 0; | |
542 | len = strlen(dev->name) + 1; | |
543 | if (len > _IOC_SIZE(cmd)) | |
544 | len = _IOC_SIZE(cmd); | |
545 | if (copy_to_user(argp, dev->name, len)) | |
1da177e4 | 546 | return -EFAULT; |
b126207c DT |
547 | return len; |
548 | } | |
1da177e4 LT |
549 | } |
550 | return -EINVAL; | |
551 | } | |
552 | ||
024ac44c | 553 | #ifdef CONFIG_COMPAT |
b126207c DT |
554 | static long joydev_compat_ioctl(struct file *file, |
555 | unsigned int cmd, unsigned long arg) | |
024ac44c | 556 | { |
d0ffb9be DT |
557 | struct joydev_client *client = file->private_data; |
558 | struct joydev *joydev = client->joydev; | |
024ac44c JF |
559 | void __user *argp = (void __user *)arg; |
560 | s32 tmp32; | |
561 | struct JS_DATA_SAVE_TYPE_32 ds32; | |
b126207c | 562 | int retval; |
024ac44c | 563 | |
b126207c DT |
564 | retval = mutex_lock_interruptible(&joydev->mutex); |
565 | if (retval) | |
566 | return retval; | |
567 | ||
568 | if (!joydev->exist) { | |
569 | retval = -ENODEV; | |
570 | goto out; | |
571 | } | |
572 | ||
573 | switch (cmd) { | |
1e0afb28 | 574 | |
024ac44c | 575 | case JS_SET_TIMELIMIT: |
b126207c DT |
576 | retval = get_user(tmp32, (s32 __user *) arg); |
577 | if (retval == 0) | |
024ac44c JF |
578 | joydev->glue.JS_TIMELIMIT = tmp32; |
579 | break; | |
b126207c | 580 | |
024ac44c JF |
581 | case JS_GET_TIMELIMIT: |
582 | tmp32 = joydev->glue.JS_TIMELIMIT; | |
b126207c | 583 | retval = put_user(tmp32, (s32 __user *) arg); |
024ac44c JF |
584 | break; |
585 | ||
586 | case JS_SET_ALL: | |
b126207c DT |
587 | retval = copy_from_user(&ds32, argp, |
588 | sizeof(ds32)) ? -EFAULT : 0; | |
589 | if (retval == 0) { | |
024ac44c JF |
590 | joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT; |
591 | joydev->glue.BUSY = ds32.BUSY; | |
592 | joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME; | |
593 | joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT; | |
594 | joydev->glue.JS_SAVE = ds32.JS_SAVE; | |
595 | joydev->glue.JS_CORR = ds32.JS_CORR; | |
596 | } | |
597 | break; | |
598 | ||
599 | case JS_GET_ALL: | |
600 | ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT; | |
601 | ds32.BUSY = joydev->glue.BUSY; | |
602 | ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME; | |
603 | ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT; | |
604 | ds32.JS_SAVE = joydev->glue.JS_SAVE; | |
605 | ds32.JS_CORR = joydev->glue.JS_CORR; | |
606 | ||
b126207c | 607 | retval = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0; |
024ac44c JF |
608 | break; |
609 | ||
610 | default: | |
b126207c DT |
611 | retval = joydev_ioctl_common(joydev, cmd, argp); |
612 | break; | |
024ac44c | 613 | } |
b126207c DT |
614 | |
615 | out: | |
616 | mutex_unlock(&joydev->mutex); | |
617 | return retval; | |
024ac44c JF |
618 | } |
619 | #endif /* CONFIG_COMPAT */ | |
620 | ||
b126207c DT |
621 | static long joydev_ioctl(struct file *file, |
622 | unsigned int cmd, unsigned long arg) | |
024ac44c | 623 | { |
d0ffb9be DT |
624 | struct joydev_client *client = file->private_data; |
625 | struct joydev *joydev = client->joydev; | |
024ac44c | 626 | void __user *argp = (void __user *)arg; |
b126207c | 627 | int retval; |
024ac44c | 628 | |
b126207c DT |
629 | retval = mutex_lock_interruptible(&joydev->mutex); |
630 | if (retval) | |
631 | return retval; | |
024ac44c | 632 | |
b126207c DT |
633 | if (!joydev->exist) { |
634 | retval = -ENODEV; | |
635 | goto out; | |
024ac44c | 636 | } |
b126207c DT |
637 | |
638 | switch (cmd) { | |
639 | ||
640 | case JS_SET_TIMELIMIT: | |
641 | retval = get_user(joydev->glue.JS_TIMELIMIT, | |
642 | (long __user *) arg); | |
643 | break; | |
644 | ||
645 | case JS_GET_TIMELIMIT: | |
646 | retval = put_user(joydev->glue.JS_TIMELIMIT, | |
647 | (long __user *) arg); | |
648 | break; | |
649 | ||
650 | case JS_SET_ALL: | |
651 | retval = copy_from_user(&joydev->glue, argp, | |
652 | sizeof(joydev->glue)) ? -EFAULT: 0; | |
653 | break; | |
654 | ||
655 | case JS_GET_ALL: | |
656 | retval = copy_to_user(argp, &joydev->glue, | |
657 | sizeof(joydev->glue)) ? -EFAULT : 0; | |
658 | break; | |
659 | ||
660 | default: | |
661 | retval = joydev_ioctl_common(joydev, cmd, argp); | |
662 | break; | |
663 | } | |
664 | out: | |
665 | mutex_unlock(&joydev->mutex); | |
666 | return retval; | |
024ac44c JF |
667 | } |
668 | ||
66e66118 | 669 | static const struct file_operations joydev_fops = { |
b126207c DT |
670 | .owner = THIS_MODULE, |
671 | .read = joydev_read, | |
672 | .poll = joydev_poll, | |
673 | .open = joydev_open, | |
674 | .release = joydev_release, | |
675 | .unlocked_ioctl = joydev_ioctl, | |
024ac44c | 676 | #ifdef CONFIG_COMPAT |
b126207c | 677 | .compat_ioctl = joydev_compat_ioctl, |
024ac44c | 678 | #endif |
b126207c | 679 | .fasync = joydev_fasync, |
1da177e4 LT |
680 | }; |
681 | ||
b126207c DT |
682 | static int joydev_install_chrdev(struct joydev *joydev) |
683 | { | |
684 | joydev_table[joydev->minor] = joydev; | |
685 | return 0; | |
686 | } | |
687 | ||
688 | static void joydev_remove_chrdev(struct joydev *joydev) | |
689 | { | |
690 | mutex_lock(&joydev_table_mutex); | |
691 | joydev_table[joydev->minor] = NULL; | |
692 | mutex_unlock(&joydev_table_mutex); | |
693 | } | |
694 | ||
695 | /* | |
696 | * Mark device non-existant. This disables writes, ioctls and | |
697 | * prevents new users from opening the device. Already posted | |
698 | * blocking reads will stay, however new ones will fail. | |
699 | */ | |
700 | static void joydev_mark_dead(struct joydev *joydev) | |
701 | { | |
702 | mutex_lock(&joydev->mutex); | |
703 | joydev->exist = 0; | |
704 | mutex_unlock(&joydev->mutex); | |
705 | } | |
706 | ||
707 | static void joydev_cleanup(struct joydev *joydev) | |
708 | { | |
709 | struct input_handle *handle = &joydev->handle; | |
710 | ||
711 | joydev_mark_dead(joydev); | |
712 | joydev_hangup(joydev); | |
713 | joydev_remove_chrdev(joydev); | |
714 | ||
715 | /* joydev is marked dead so noone else accesses joydev->open */ | |
716 | if (joydev->open) | |
717 | input_close_device(handle); | |
718 | } | |
719 | ||
5b2a0826 DT |
720 | static int joydev_connect(struct input_handler *handler, struct input_dev *dev, |
721 | const struct input_device_id *id) | |
1da177e4 LT |
722 | { |
723 | struct joydev *joydev; | |
724 | int i, j, t, minor; | |
5b2a0826 | 725 | int error; |
1da177e4 | 726 | |
b126207c DT |
727 | for (minor = 0; minor < JOYDEV_MINORS; minor++) |
728 | if (!joydev_table[minor]) | |
729 | break; | |
730 | ||
1da177e4 LT |
731 | if (minor == JOYDEV_MINORS) { |
732 | printk(KERN_ERR "joydev: no more free joydev devices\n"); | |
5b2a0826 | 733 | return -ENFILE; |
1da177e4 LT |
734 | } |
735 | ||
5b2a0826 DT |
736 | joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL); |
737 | if (!joydev) | |
738 | return -ENOMEM; | |
1da177e4 | 739 | |
d0ffb9be | 740 | INIT_LIST_HEAD(&joydev->client_list); |
b126207c DT |
741 | spin_lock_init(&joydev->client_lock); |
742 | mutex_init(&joydev->mutex); | |
1da177e4 LT |
743 | init_waitqueue_head(&joydev->wait); |
744 | ||
b126207c DT |
745 | snprintf(joydev->name, sizeof(joydev->name), "js%d", minor); |
746 | joydev->exist = 1; | |
1da177e4 | 747 | joydev->minor = minor; |
b126207c | 748 | |
1da177e4 | 749 | joydev->exist = 1; |
a7097ff8 | 750 | joydev->handle.dev = input_get_device(dev); |
1da177e4 LT |
751 | joydev->handle.name = joydev->name; |
752 | joydev->handle.handler = handler; | |
753 | joydev->handle.private = joydev; | |
1da177e4 LT |
754 | |
755 | for (i = 0; i < ABS_MAX + 1; i++) | |
756 | if (test_bit(i, dev->absbit)) { | |
757 | joydev->absmap[i] = joydev->nabs; | |
758 | joydev->abspam[joydev->nabs] = i; | |
759 | joydev->nabs++; | |
760 | } | |
761 | ||
762 | for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++) | |
763 | if (test_bit(i + BTN_MISC, dev->keybit)) { | |
764 | joydev->keymap[i] = joydev->nkey; | |
765 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
766 | joydev->nkey++; | |
767 | } | |
768 | ||
f24949e8 | 769 | for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++) |
1da177e4 LT |
770 | if (test_bit(i + BTN_MISC, dev->keybit)) { |
771 | joydev->keymap[i] = joydev->nkey; | |
772 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
773 | joydev->nkey++; | |
774 | } | |
775 | ||
776 | for (i = 0; i < joydev->nabs; i++) { | |
777 | j = joydev->abspam[i]; | |
778 | if (dev->absmax[j] == dev->absmin[j]) { | |
779 | joydev->corr[i].type = JS_CORR_NONE; | |
780 | joydev->abs[i] = dev->abs[j]; | |
781 | continue; | |
782 | } | |
783 | joydev->corr[i].type = JS_CORR_BROKEN; | |
784 | joydev->corr[i].prec = dev->absfuzz[j]; | |
b126207c DT |
785 | joydev->corr[i].coef[0] = |
786 | (dev->absmax[j] + dev->absmin[j]) / 2 - dev->absflat[j]; | |
787 | joydev->corr[i].coef[1] = | |
788 | (dev->absmax[j] + dev->absmin[j]) / 2 + dev->absflat[j]; | |
789 | ||
790 | t = (dev->absmax[j] - dev->absmin[j]) / 2 - 2 * dev->absflat[j]; | |
791 | if (t) { | |
792 | joydev->corr[i].coef[2] = (1 << 29) / t; | |
793 | joydev->corr[i].coef[3] = (1 << 29) / t; | |
794 | ||
795 | joydev->abs[i] = joydev_correct(dev->abs[j], | |
796 | joydev->corr + i); | |
797 | } | |
1da177e4 LT |
798 | } |
799 | ||
a6c2490f | 800 | dev_set_name(&joydev->dev, joydev->name); |
b126207c | 801 | joydev->dev.devt = MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor); |
9657d75c DT |
802 | joydev->dev.class = &input_class; |
803 | joydev->dev.parent = &dev->dev; | |
9657d75c DT |
804 | joydev->dev.release = joydev_free; |
805 | device_initialize(&joydev->dev); | |
5b2a0826 | 806 | |
b126207c | 807 | error = input_register_handle(&joydev->handle); |
5b2a0826 | 808 | if (error) |
9657d75c | 809 | goto err_free_joydev; |
5b2a0826 | 810 | |
b126207c | 811 | error = joydev_install_chrdev(joydev); |
5b2a0826 | 812 | if (error) |
b126207c DT |
813 | goto err_unregister_handle; |
814 | ||
815 | error = device_add(&joydev->dev); | |
816 | if (error) | |
817 | goto err_cleanup_joydev; | |
5b2a0826 DT |
818 | |
819 | return 0; | |
1da177e4 | 820 | |
b126207c DT |
821 | err_cleanup_joydev: |
822 | joydev_cleanup(joydev); | |
823 | err_unregister_handle: | |
824 | input_unregister_handle(&joydev->handle); | |
5b2a0826 | 825 | err_free_joydev: |
9657d75c | 826 | put_device(&joydev->dev); |
5b2a0826 | 827 | return error; |
1da177e4 LT |
828 | } |
829 | ||
830 | static void joydev_disconnect(struct input_handle *handle) | |
831 | { | |
832 | struct joydev *joydev = handle->private; | |
1da177e4 | 833 | |
9657d75c | 834 | device_del(&joydev->dev); |
b126207c DT |
835 | joydev_cleanup(joydev); |
836 | input_unregister_handle(handle); | |
9657d75c | 837 | put_device(&joydev->dev); |
1da177e4 LT |
838 | } |
839 | ||
66e66118 | 840 | static const struct input_device_id joydev_blacklist[] = { |
1da177e4 | 841 | { |
b126207c DT |
842 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
843 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
7b19ada2 JS |
844 | .evbit = { BIT_MASK(EV_KEY) }, |
845 | .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) }, | |
d07a9cba TC |
846 | }, /* Avoid itouchpads and touchscreens */ |
847 | { | |
848 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
849 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
850 | .evbit = { BIT_MASK(EV_KEY) }, | |
851 | .keybit = { [BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_DIGI) }, | |
852 | }, /* Avoid tablets, digitisers and similar devices */ | |
1e0afb28 | 853 | { } /* Terminating entry */ |
1da177e4 LT |
854 | }; |
855 | ||
66e66118 | 856 | static const struct input_device_id joydev_ids[] = { |
1da177e4 | 857 | { |
b126207c DT |
858 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
859 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
860 | .evbit = { BIT_MASK(EV_ABS) }, |
861 | .absbit = { BIT_MASK(ABS_X) }, | |
1da177e4 LT |
862 | }, |
863 | { | |
b126207c DT |
864 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
865 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
866 | .evbit = { BIT_MASK(EV_ABS) }, |
867 | .absbit = { BIT_MASK(ABS_WHEEL) }, | |
1da177e4 LT |
868 | }, |
869 | { | |
b126207c DT |
870 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
871 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
872 | .evbit = { BIT_MASK(EV_ABS) }, |
873 | .absbit = { BIT_MASK(ABS_THROTTLE) }, | |
1da177e4 | 874 | }, |
1e0afb28 | 875 | { } /* Terminating entry */ |
1da177e4 LT |
876 | }; |
877 | ||
878 | MODULE_DEVICE_TABLE(input, joydev_ids); | |
879 | ||
880 | static struct input_handler joydev_handler = { | |
b126207c DT |
881 | .event = joydev_event, |
882 | .connect = joydev_connect, | |
883 | .disconnect = joydev_disconnect, | |
884 | .fops = &joydev_fops, | |
885 | .minor = JOYDEV_MINOR_BASE, | |
886 | .name = "joydev", | |
887 | .id_table = joydev_ids, | |
888 | .blacklist = joydev_blacklist, | |
1da177e4 LT |
889 | }; |
890 | ||
891 | static int __init joydev_init(void) | |
892 | { | |
4263cf0f | 893 | return input_register_handler(&joydev_handler); |
1da177e4 LT |
894 | } |
895 | ||
896 | static void __exit joydev_exit(void) | |
897 | { | |
898 | input_unregister_handler(&joydev_handler); | |
899 | } | |
900 | ||
901 | module_init(joydev_init); | |
902 | module_exit(joydev_exit); |