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 | ||
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 | |
b126207c DT |
152 | list_for_each_entry_rcu(client, &joydev->client_list, node) |
153 | joydev_pass_event(client, &event); | |
1da177e4 LT |
154 | |
155 | wake_up_interruptible(&joydev->wait); | |
156 | } | |
157 | ||
158 | static int joydev_fasync(int fd, struct file *file, int on) | |
159 | { | |
160 | int retval; | |
d0ffb9be | 161 | struct joydev_client *client = file->private_data; |
1e0afb28 | 162 | |
d0ffb9be | 163 | retval = fasync_helper(fd, file, on, &client->fasync); |
1e0afb28 | 164 | |
1da177e4 LT |
165 | return retval < 0 ? retval : 0; |
166 | } | |
167 | ||
9657d75c | 168 | static void joydev_free(struct device *dev) |
1da177e4 | 169 | { |
9657d75c DT |
170 | struct joydev *joydev = container_of(dev, struct joydev, dev); |
171 | ||
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); | |
181 | /* | |
182 | * We don't use synchronize_rcu() here because read-side | |
183 | * critical section is protected by a spinlock (dev->event_lock) | |
184 | * instead of rcu_read_lock(). | |
185 | */ | |
186 | synchronize_sched(); | |
187 | } | |
188 | ||
189 | static void joydev_detach_client(struct joydev *joydev, | |
190 | struct joydev_client *client) | |
191 | { | |
192 | spin_lock(&joydev->client_lock); | |
193 | list_del_rcu(&client->node); | |
194 | spin_unlock(&joydev->client_lock); | |
195 | synchronize_sched(); | |
196 | } | |
197 | ||
198 | static int joydev_open_device(struct joydev *joydev) | |
199 | { | |
200 | int retval; | |
201 | ||
202 | retval = mutex_lock_interruptible(&joydev->mutex); | |
203 | if (retval) | |
204 | return retval; | |
205 | ||
206 | if (!joydev->exist) | |
207 | retval = -ENODEV; | |
06445014 | 208 | else if (!joydev->open++) { |
b126207c | 209 | retval = input_open_device(&joydev->handle); |
06445014 ON |
210 | if (retval) |
211 | joydev->open--; | |
212 | } | |
b126207c DT |
213 | |
214 | mutex_unlock(&joydev->mutex); | |
215 | return retval; | |
216 | } | |
217 | ||
218 | static void joydev_close_device(struct joydev *joydev) | |
219 | { | |
220 | mutex_lock(&joydev->mutex); | |
221 | ||
222 | if (joydev->exist && !--joydev->open) | |
223 | input_close_device(&joydev->handle); | |
224 | ||
225 | mutex_unlock(&joydev->mutex); | |
226 | } | |
227 | ||
228 | /* | |
229 | * Wake up users waiting for IO so they can disconnect from | |
230 | * dead device. | |
231 | */ | |
232 | static void joydev_hangup(struct joydev *joydev) | |
233 | { | |
234 | struct joydev_client *client; | |
235 | ||
236 | spin_lock(&joydev->client_lock); | |
237 | list_for_each_entry(client, &joydev->client_list, node) | |
238 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
239 | spin_unlock(&joydev->client_lock); | |
240 | ||
241 | wake_up_interruptible(&joydev->wait); | |
242 | } | |
243 | ||
d0ffb9be | 244 | static int joydev_release(struct inode *inode, struct file *file) |
1da177e4 | 245 | { |
d0ffb9be DT |
246 | struct joydev_client *client = file->private_data; |
247 | struct joydev *joydev = client->joydev; | |
1da177e4 LT |
248 | |
249 | joydev_fasync(-1, file, 0); | |
b126207c | 250 | joydev_detach_client(joydev, client); |
d0ffb9be | 251 | kfree(client); |
1da177e4 | 252 | |
b126207c | 253 | joydev_close_device(joydev); |
9657d75c | 254 | put_device(&joydev->dev); |
1da177e4 | 255 | |
1da177e4 LT |
256 | return 0; |
257 | } | |
258 | ||
259 | static int joydev_open(struct inode *inode, struct file *file) | |
260 | { | |
d0ffb9be DT |
261 | struct joydev_client *client; |
262 | struct joydev *joydev; | |
1da177e4 | 263 | int i = iminor(inode) - JOYDEV_MINOR_BASE; |
d542ed82 | 264 | int error; |
1da177e4 | 265 | |
d0ffb9be DT |
266 | if (i >= JOYDEV_MINORS) |
267 | return -ENODEV; | |
1da177e4 | 268 | |
b126207c DT |
269 | error = mutex_lock_interruptible(&joydev_table_mutex); |
270 | if (error) | |
271 | return error; | |
d0ffb9be | 272 | joydev = joydev_table[i]; |
b126207c DT |
273 | if (joydev) |
274 | get_device(&joydev->dev); | |
275 | mutex_unlock(&joydev_table_mutex); | |
1da177e4 | 276 | |
b126207c DT |
277 | if (!joydev) |
278 | return -ENODEV; | |
9657d75c | 279 | |
d0ffb9be | 280 | client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL); |
9657d75c DT |
281 | if (!client) { |
282 | error = -ENOMEM; | |
283 | goto err_put_joydev; | |
284 | } | |
1da177e4 | 285 | |
b126207c | 286 | spin_lock_init(&client->buffer_lock); |
d0ffb9be | 287 | client->joydev = joydev; |
b126207c | 288 | joydev_attach_client(joydev, client); |
1da177e4 | 289 | |
b126207c DT |
290 | error = joydev_open_device(joydev); |
291 | if (error) | |
292 | goto err_free_client; | |
1da177e4 | 293 | |
d0ffb9be | 294 | file->private_data = client; |
1da177e4 | 295 | return 0; |
9657d75c DT |
296 | |
297 | err_free_client: | |
b126207c | 298 | joydev_detach_client(joydev, client); |
9657d75c DT |
299 | kfree(client); |
300 | err_put_joydev: | |
301 | put_device(&joydev->dev); | |
302 | return error; | |
1da177e4 LT |
303 | } |
304 | ||
b126207c DT |
305 | static int joydev_generate_startup_event(struct joydev_client *client, |
306 | struct input_dev *input, | |
307 | struct js_event *event) | |
1da177e4 | 308 | { |
b126207c DT |
309 | struct joydev *joydev = client->joydev; |
310 | int have_event; | |
311 | ||
312 | spin_lock_irq(&client->buffer_lock); | |
313 | ||
314 | have_event = client->startup < joydev->nabs + joydev->nkey; | |
315 | ||
316 | if (have_event) { | |
317 | ||
318 | event->time = jiffies_to_msecs(jiffies); | |
319 | if (client->startup < joydev->nkey) { | |
320 | event->type = JS_EVENT_BUTTON | JS_EVENT_INIT; | |
321 | event->number = client->startup; | |
322 | event->value = !!test_bit(joydev->keypam[event->number], | |
323 | input->key); | |
324 | } else { | |
325 | event->type = JS_EVENT_AXIS | JS_EVENT_INIT; | |
326 | event->number = client->startup - joydev->nkey; | |
327 | event->value = joydev->abs[event->number]; | |
328 | } | |
329 | client->startup++; | |
330 | } | |
331 | ||
332 | spin_unlock_irq(&client->buffer_lock); | |
333 | ||
334 | return have_event; | |
335 | } | |
336 | ||
337 | static int joydev_fetch_next_event(struct joydev_client *client, | |
338 | struct js_event *event) | |
339 | { | |
340 | int have_event; | |
341 | ||
342 | spin_lock_irq(&client->buffer_lock); | |
343 | ||
344 | have_event = client->head != client->tail; | |
345 | if (have_event) { | |
346 | *event = client->buffer[client->tail++]; | |
347 | client->tail &= JOYDEV_BUFFER_SIZE - 1; | |
348 | } | |
349 | ||
350 | spin_unlock_irq(&client->buffer_lock); | |
351 | ||
352 | return have_event; | |
353 | } | |
354 | ||
355 | /* | |
356 | * Old joystick interface | |
357 | */ | |
358 | static ssize_t joydev_0x_read(struct joydev_client *client, | |
359 | struct input_dev *input, | |
360 | char __user *buf) | |
361 | { | |
362 | struct joydev *joydev = client->joydev; | |
363 | struct JS_DATA_TYPE data; | |
364 | int i; | |
365 | ||
366 | spin_lock_irq(&input->event_lock); | |
367 | ||
368 | /* | |
369 | * Get device state | |
370 | */ | |
371 | for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++) | |
372 | data.buttons |= | |
373 | test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0; | |
374 | data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x; | |
375 | data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y; | |
376 | ||
377 | /* | |
378 | * Reset reader's event queue | |
379 | */ | |
380 | spin_lock(&client->buffer_lock); | |
381 | client->startup = 0; | |
382 | client->tail = client->head; | |
383 | spin_unlock(&client->buffer_lock); | |
384 | ||
385 | spin_unlock_irq(&input->event_lock); | |
386 | ||
387 | if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE))) | |
388 | return -EFAULT; | |
389 | ||
390 | return sizeof(struct JS_DATA_TYPE); | |
1da177e4 LT |
391 | } |
392 | ||
b126207c DT |
393 | static inline int joydev_data_pending(struct joydev_client *client) |
394 | { | |
395 | struct joydev *joydev = client->joydev; | |
396 | ||
397 | return client->startup < joydev->nabs + joydev->nkey || | |
398 | client->head != client->tail; | |
399 | } | |
400 | ||
401 | static ssize_t joydev_read(struct file *file, char __user *buf, | |
402 | size_t count, loff_t *ppos) | |
1da177e4 | 403 | { |
d0ffb9be DT |
404 | struct joydev_client *client = file->private_data; |
405 | struct joydev *joydev = client->joydev; | |
1da177e4 | 406 | struct input_dev *input = joydev->handle.dev; |
b126207c DT |
407 | struct js_event event; |
408 | int retval; | |
1da177e4 | 409 | |
d0ffb9be | 410 | if (!joydev->exist) |
1da177e4 LT |
411 | return -ENODEV; |
412 | ||
413 | if (count < sizeof(struct js_event)) | |
414 | return -EINVAL; | |
415 | ||
b126207c DT |
416 | if (count == sizeof(struct JS_DATA_TYPE)) |
417 | return joydev_0x_read(client, input, buf); | |
1da177e4 | 418 | |
b126207c | 419 | if (!joydev_data_pending(client) && (file->f_flags & O_NONBLOCK)) |
1e0afb28 | 420 | return -EAGAIN; |
1da177e4 | 421 | |
d0ffb9be | 422 | retval = wait_event_interruptible(joydev->wait, |
b126207c | 423 | !joydev->exist || joydev_data_pending(client)); |
1da177e4 LT |
424 | if (retval) |
425 | return retval; | |
426 | ||
d0ffb9be | 427 | if (!joydev->exist) |
1da177e4 LT |
428 | return -ENODEV; |
429 | ||
b126207c DT |
430 | while (retval + sizeof(struct js_event) <= count && |
431 | joydev_generate_startup_event(client, input, &event)) { | |
1da177e4 LT |
432 | |
433 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) | |
434 | return -EFAULT; | |
435 | ||
1da177e4 LT |
436 | retval += sizeof(struct js_event); |
437 | } | |
438 | ||
b126207c DT |
439 | while (retval + sizeof(struct js_event) <= count && |
440 | joydev_fetch_next_event(client, &event)) { | |
1da177e4 | 441 | |
b126207c | 442 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) |
1da177e4 LT |
443 | return -EFAULT; |
444 | ||
1da177e4 LT |
445 | retval += sizeof(struct js_event); |
446 | } | |
447 | ||
448 | return retval; | |
449 | } | |
450 | ||
451 | /* No kernel lock - fine */ | |
452 | static unsigned int joydev_poll(struct file *file, poll_table *wait) | |
453 | { | |
d0ffb9be DT |
454 | struct joydev_client *client = file->private_data; |
455 | struct joydev *joydev = client->joydev; | |
1e0afb28 | 456 | |
d0ffb9be | 457 | poll_wait(file, &joydev->wait, wait); |
b126207c DT |
458 | return (joydev_data_pending(client) ? (POLLIN | POLLRDNORM) : 0) | |
459 | (joydev->exist ? 0 : (POLLHUP | POLLERR)); | |
1da177e4 LT |
460 | } |
461 | ||
b126207c DT |
462 | static int joydev_ioctl_common(struct joydev *joydev, |
463 | unsigned int cmd, void __user *argp) | |
1da177e4 | 464 | { |
1da177e4 | 465 | struct input_dev *dev = joydev->handle.dev; |
1da177e4 LT |
466 | int i, j; |
467 | ||
1da177e4 LT |
468 | switch (cmd) { |
469 | ||
b126207c DT |
470 | case JS_SET_CAL: |
471 | return copy_from_user(&joydev->glue.JS_CORR, argp, | |
024ac44c | 472 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 473 | |
b126207c DT |
474 | case JS_GET_CAL: |
475 | return copy_to_user(argp, &joydev->glue.JS_CORR, | |
024ac44c | 476 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 477 | |
b126207c DT |
478 | case JS_SET_TIMEOUT: |
479 | return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1e0afb28 | 480 | |
b126207c DT |
481 | case JS_GET_TIMEOUT: |
482 | return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1da177e4 | 483 | |
b126207c DT |
484 | case JSIOCGVERSION: |
485 | return put_user(JS_VERSION, (__u32 __user *) argp); | |
1e0afb28 | 486 | |
b126207c DT |
487 | case JSIOCGAXES: |
488 | return put_user(joydev->nabs, (__u8 __user *) argp); | |
1e0afb28 | 489 | |
b126207c DT |
490 | case JSIOCGBUTTONS: |
491 | return put_user(joydev->nkey, (__u8 __user *) argp); | |
1e0afb28 | 492 | |
b126207c DT |
493 | case JSIOCSCORR: |
494 | if (copy_from_user(joydev->corr, argp, | |
495 | sizeof(joydev->corr[0]) * joydev->nabs)) | |
496 | return -EFAULT; | |
1e0afb28 | 497 | |
b126207c DT |
498 | for (i = 0; i < joydev->nabs; i++) { |
499 | j = joydev->abspam[i]; | |
500 | joydev->abs[i] = joydev_correct(dev->abs[j], | |
501 | &joydev->corr[i]); | |
502 | } | |
503 | return 0; | |
1e0afb28 | 504 | |
b126207c DT |
505 | case JSIOCGCORR: |
506 | return copy_to_user(argp, joydev->corr, | |
507 | sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0; | |
508 | ||
509 | case JSIOCSAXMAP: | |
510 | if (copy_from_user(joydev->abspam, argp, | |
511 | sizeof(__u8) * (ABS_MAX + 1))) | |
512 | return -EFAULT; | |
513 | ||
514 | for (i = 0; i < joydev->nabs; i++) { | |
515 | if (joydev->abspam[i] > ABS_MAX) | |
516 | return -EINVAL; | |
517 | joydev->absmap[joydev->abspam[i]] = i; | |
518 | } | |
519 | return 0; | |
520 | ||
521 | case JSIOCGAXMAP: | |
522 | return copy_to_user(argp, joydev->abspam, | |
523 | sizeof(__u8) * (ABS_MAX + 1)) ? -EFAULT : 0; | |
524 | ||
525 | case JSIOCSBTNMAP: | |
526 | if (copy_from_user(joydev->keypam, argp, | |
527 | sizeof(__u16) * (KEY_MAX - BTN_MISC + 1))) | |
528 | return -EFAULT; | |
529 | ||
530 | for (i = 0; i < joydev->nkey; i++) { | |
531 | if (joydev->keypam[i] > KEY_MAX || | |
532 | joydev->keypam[i] < BTN_MISC) | |
533 | return -EINVAL; | |
534 | joydev->keymap[joydev->keypam[i] - BTN_MISC] = i; | |
535 | } | |
536 | ||
537 | return 0; | |
538 | ||
539 | case JSIOCGBTNMAP: | |
540 | return copy_to_user(argp, joydev->keypam, | |
541 | sizeof(__u16) * (KEY_MAX - BTN_MISC + 1)) ? -EFAULT : 0; | |
542 | ||
543 | default: | |
544 | if ((cmd & ~IOCSIZE_MASK) == JSIOCGNAME(0)) { | |
545 | int len; | |
546 | if (!dev->name) | |
547 | return 0; | |
548 | len = strlen(dev->name) + 1; | |
549 | if (len > _IOC_SIZE(cmd)) | |
550 | len = _IOC_SIZE(cmd); | |
551 | if (copy_to_user(argp, dev->name, len)) | |
1da177e4 | 552 | return -EFAULT; |
b126207c DT |
553 | return len; |
554 | } | |
1da177e4 LT |
555 | } |
556 | return -EINVAL; | |
557 | } | |
558 | ||
024ac44c | 559 | #ifdef CONFIG_COMPAT |
b126207c DT |
560 | static long joydev_compat_ioctl(struct file *file, |
561 | unsigned int cmd, unsigned long arg) | |
024ac44c | 562 | { |
d0ffb9be DT |
563 | struct joydev_client *client = file->private_data; |
564 | struct joydev *joydev = client->joydev; | |
024ac44c JF |
565 | void __user *argp = (void __user *)arg; |
566 | s32 tmp32; | |
567 | struct JS_DATA_SAVE_TYPE_32 ds32; | |
b126207c | 568 | int retval; |
024ac44c | 569 | |
b126207c DT |
570 | retval = mutex_lock_interruptible(&joydev->mutex); |
571 | if (retval) | |
572 | return retval; | |
573 | ||
574 | if (!joydev->exist) { | |
575 | retval = -ENODEV; | |
576 | goto out; | |
577 | } | |
578 | ||
579 | switch (cmd) { | |
1e0afb28 | 580 | |
024ac44c | 581 | case JS_SET_TIMELIMIT: |
b126207c DT |
582 | retval = get_user(tmp32, (s32 __user *) arg); |
583 | if (retval == 0) | |
024ac44c JF |
584 | joydev->glue.JS_TIMELIMIT = tmp32; |
585 | break; | |
b126207c | 586 | |
024ac44c JF |
587 | case JS_GET_TIMELIMIT: |
588 | tmp32 = joydev->glue.JS_TIMELIMIT; | |
b126207c | 589 | retval = put_user(tmp32, (s32 __user *) arg); |
024ac44c JF |
590 | break; |
591 | ||
592 | case JS_SET_ALL: | |
b126207c DT |
593 | retval = copy_from_user(&ds32, argp, |
594 | sizeof(ds32)) ? -EFAULT : 0; | |
595 | if (retval == 0) { | |
024ac44c JF |
596 | joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT; |
597 | joydev->glue.BUSY = ds32.BUSY; | |
598 | joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME; | |
599 | joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT; | |
600 | joydev->glue.JS_SAVE = ds32.JS_SAVE; | |
601 | joydev->glue.JS_CORR = ds32.JS_CORR; | |
602 | } | |
603 | break; | |
604 | ||
605 | case JS_GET_ALL: | |
606 | ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT; | |
607 | ds32.BUSY = joydev->glue.BUSY; | |
608 | ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME; | |
609 | ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT; | |
610 | ds32.JS_SAVE = joydev->glue.JS_SAVE; | |
611 | ds32.JS_CORR = joydev->glue.JS_CORR; | |
612 | ||
b126207c | 613 | retval = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0; |
024ac44c JF |
614 | break; |
615 | ||
616 | default: | |
b126207c DT |
617 | retval = joydev_ioctl_common(joydev, cmd, argp); |
618 | break; | |
024ac44c | 619 | } |
b126207c DT |
620 | |
621 | out: | |
622 | mutex_unlock(&joydev->mutex); | |
623 | return retval; | |
024ac44c JF |
624 | } |
625 | #endif /* CONFIG_COMPAT */ | |
626 | ||
b126207c DT |
627 | static long joydev_ioctl(struct file *file, |
628 | unsigned int cmd, unsigned long arg) | |
024ac44c | 629 | { |
d0ffb9be DT |
630 | struct joydev_client *client = file->private_data; |
631 | struct joydev *joydev = client->joydev; | |
024ac44c | 632 | void __user *argp = (void __user *)arg; |
b126207c | 633 | int retval; |
024ac44c | 634 | |
b126207c DT |
635 | retval = mutex_lock_interruptible(&joydev->mutex); |
636 | if (retval) | |
637 | return retval; | |
024ac44c | 638 | |
b126207c DT |
639 | if (!joydev->exist) { |
640 | retval = -ENODEV; | |
641 | goto out; | |
024ac44c | 642 | } |
b126207c DT |
643 | |
644 | switch (cmd) { | |
645 | ||
646 | case JS_SET_TIMELIMIT: | |
647 | retval = get_user(joydev->glue.JS_TIMELIMIT, | |
648 | (long __user *) arg); | |
649 | break; | |
650 | ||
651 | case JS_GET_TIMELIMIT: | |
652 | retval = put_user(joydev->glue.JS_TIMELIMIT, | |
653 | (long __user *) arg); | |
654 | break; | |
655 | ||
656 | case JS_SET_ALL: | |
657 | retval = copy_from_user(&joydev->glue, argp, | |
658 | sizeof(joydev->glue)) ? -EFAULT: 0; | |
659 | break; | |
660 | ||
661 | case JS_GET_ALL: | |
662 | retval = copy_to_user(argp, &joydev->glue, | |
663 | sizeof(joydev->glue)) ? -EFAULT : 0; | |
664 | break; | |
665 | ||
666 | default: | |
667 | retval = joydev_ioctl_common(joydev, cmd, argp); | |
668 | break; | |
669 | } | |
670 | out: | |
671 | mutex_unlock(&joydev->mutex); | |
672 | return retval; | |
024ac44c JF |
673 | } |
674 | ||
66e66118 | 675 | static const struct file_operations joydev_fops = { |
b126207c DT |
676 | .owner = THIS_MODULE, |
677 | .read = joydev_read, | |
678 | .poll = joydev_poll, | |
679 | .open = joydev_open, | |
680 | .release = joydev_release, | |
681 | .unlocked_ioctl = joydev_ioctl, | |
024ac44c | 682 | #ifdef CONFIG_COMPAT |
b126207c | 683 | .compat_ioctl = joydev_compat_ioctl, |
024ac44c | 684 | #endif |
b126207c | 685 | .fasync = joydev_fasync, |
1da177e4 LT |
686 | }; |
687 | ||
b126207c DT |
688 | static int joydev_install_chrdev(struct joydev *joydev) |
689 | { | |
690 | joydev_table[joydev->minor] = joydev; | |
691 | return 0; | |
692 | } | |
693 | ||
694 | static void joydev_remove_chrdev(struct joydev *joydev) | |
695 | { | |
696 | mutex_lock(&joydev_table_mutex); | |
697 | joydev_table[joydev->minor] = NULL; | |
698 | mutex_unlock(&joydev_table_mutex); | |
699 | } | |
700 | ||
701 | /* | |
702 | * Mark device non-existant. This disables writes, ioctls and | |
703 | * prevents new users from opening the device. Already posted | |
704 | * blocking reads will stay, however new ones will fail. | |
705 | */ | |
706 | static void joydev_mark_dead(struct joydev *joydev) | |
707 | { | |
708 | mutex_lock(&joydev->mutex); | |
709 | joydev->exist = 0; | |
710 | mutex_unlock(&joydev->mutex); | |
711 | } | |
712 | ||
713 | static void joydev_cleanup(struct joydev *joydev) | |
714 | { | |
715 | struct input_handle *handle = &joydev->handle; | |
716 | ||
717 | joydev_mark_dead(joydev); | |
718 | joydev_hangup(joydev); | |
719 | joydev_remove_chrdev(joydev); | |
720 | ||
721 | /* joydev is marked dead so noone else accesses joydev->open */ | |
722 | if (joydev->open) | |
723 | input_close_device(handle); | |
724 | } | |
725 | ||
5b2a0826 DT |
726 | static int joydev_connect(struct input_handler *handler, struct input_dev *dev, |
727 | const struct input_device_id *id) | |
1da177e4 LT |
728 | { |
729 | struct joydev *joydev; | |
730 | int i, j, t, minor; | |
5b2a0826 | 731 | int error; |
1da177e4 | 732 | |
b126207c DT |
733 | for (minor = 0; minor < JOYDEV_MINORS; minor++) |
734 | if (!joydev_table[minor]) | |
735 | break; | |
736 | ||
1da177e4 LT |
737 | if (minor == JOYDEV_MINORS) { |
738 | printk(KERN_ERR "joydev: no more free joydev devices\n"); | |
5b2a0826 | 739 | return -ENFILE; |
1da177e4 LT |
740 | } |
741 | ||
5b2a0826 DT |
742 | joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL); |
743 | if (!joydev) | |
744 | return -ENOMEM; | |
1da177e4 | 745 | |
d0ffb9be | 746 | INIT_LIST_HEAD(&joydev->client_list); |
b126207c DT |
747 | spin_lock_init(&joydev->client_lock); |
748 | mutex_init(&joydev->mutex); | |
1da177e4 LT |
749 | init_waitqueue_head(&joydev->wait); |
750 | ||
b126207c DT |
751 | snprintf(joydev->name, sizeof(joydev->name), "js%d", minor); |
752 | joydev->exist = 1; | |
1da177e4 | 753 | joydev->minor = minor; |
b126207c | 754 | |
1da177e4 LT |
755 | joydev->exist = 1; |
756 | joydev->handle.dev = dev; | |
757 | joydev->handle.name = joydev->name; | |
758 | joydev->handle.handler = handler; | |
759 | joydev->handle.private = joydev; | |
1da177e4 LT |
760 | |
761 | for (i = 0; i < ABS_MAX + 1; i++) | |
762 | if (test_bit(i, dev->absbit)) { | |
763 | joydev->absmap[i] = joydev->nabs; | |
764 | joydev->abspam[joydev->nabs] = i; | |
765 | joydev->nabs++; | |
766 | } | |
767 | ||
768 | for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++) | |
769 | if (test_bit(i + BTN_MISC, dev->keybit)) { | |
770 | joydev->keymap[i] = joydev->nkey; | |
771 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
772 | joydev->nkey++; | |
773 | } | |
774 | ||
f24949e8 | 775 | for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++) |
1da177e4 LT |
776 | if (test_bit(i + BTN_MISC, dev->keybit)) { |
777 | joydev->keymap[i] = joydev->nkey; | |
778 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
779 | joydev->nkey++; | |
780 | } | |
781 | ||
782 | for (i = 0; i < joydev->nabs; i++) { | |
783 | j = joydev->abspam[i]; | |
784 | if (dev->absmax[j] == dev->absmin[j]) { | |
785 | joydev->corr[i].type = JS_CORR_NONE; | |
786 | joydev->abs[i] = dev->abs[j]; | |
787 | continue; | |
788 | } | |
789 | joydev->corr[i].type = JS_CORR_BROKEN; | |
790 | joydev->corr[i].prec = dev->absfuzz[j]; | |
b126207c DT |
791 | joydev->corr[i].coef[0] = |
792 | (dev->absmax[j] + dev->absmin[j]) / 2 - dev->absflat[j]; | |
793 | joydev->corr[i].coef[1] = | |
794 | (dev->absmax[j] + dev->absmin[j]) / 2 + dev->absflat[j]; | |
795 | ||
796 | t = (dev->absmax[j] - dev->absmin[j]) / 2 - 2 * dev->absflat[j]; | |
797 | if (t) { | |
798 | joydev->corr[i].coef[2] = (1 << 29) / t; | |
799 | joydev->corr[i].coef[3] = (1 << 29) / t; | |
800 | ||
801 | joydev->abs[i] = joydev_correct(dev->abs[j], | |
802 | joydev->corr + i); | |
803 | } | |
1da177e4 LT |
804 | } |
805 | ||
b126207c DT |
806 | strlcpy(joydev->dev.bus_id, joydev->name, sizeof(joydev->dev.bus_id)); |
807 | joydev->dev.devt = MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor); | |
9657d75c DT |
808 | joydev->dev.class = &input_class; |
809 | joydev->dev.parent = &dev->dev; | |
9657d75c DT |
810 | joydev->dev.release = joydev_free; |
811 | device_initialize(&joydev->dev); | |
5b2a0826 | 812 | |
b126207c | 813 | error = input_register_handle(&joydev->handle); |
5b2a0826 | 814 | if (error) |
9657d75c | 815 | goto err_free_joydev; |
5b2a0826 | 816 | |
b126207c | 817 | error = joydev_install_chrdev(joydev); |
5b2a0826 | 818 | if (error) |
b126207c DT |
819 | goto err_unregister_handle; |
820 | ||
821 | error = device_add(&joydev->dev); | |
822 | if (error) | |
823 | goto err_cleanup_joydev; | |
5b2a0826 DT |
824 | |
825 | return 0; | |
1da177e4 | 826 | |
b126207c DT |
827 | err_cleanup_joydev: |
828 | joydev_cleanup(joydev); | |
829 | err_unregister_handle: | |
830 | input_unregister_handle(&joydev->handle); | |
5b2a0826 | 831 | err_free_joydev: |
9657d75c | 832 | put_device(&joydev->dev); |
5b2a0826 | 833 | return error; |
1da177e4 LT |
834 | } |
835 | ||
836 | static void joydev_disconnect(struct input_handle *handle) | |
837 | { | |
838 | struct joydev *joydev = handle->private; | |
1da177e4 | 839 | |
9657d75c | 840 | device_del(&joydev->dev); |
b126207c DT |
841 | joydev_cleanup(joydev); |
842 | input_unregister_handle(handle); | |
9657d75c | 843 | put_device(&joydev->dev); |
1da177e4 LT |
844 | } |
845 | ||
66e66118 | 846 | static const struct input_device_id joydev_blacklist[] = { |
1da177e4 | 847 | { |
b126207c DT |
848 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
849 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
1da177e4 LT |
850 | .evbit = { BIT(EV_KEY) }, |
851 | .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) }, | |
1e0afb28 DT |
852 | }, /* Avoid itouchpads, touchscreens and tablets */ |
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, | |
1da177e4 LT |
860 | .evbit = { BIT(EV_ABS) }, |
861 | .absbit = { BIT(ABS_X) }, | |
862 | }, | |
863 | { | |
b126207c DT |
864 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
865 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
1da177e4 LT |
866 | .evbit = { BIT(EV_ABS) }, |
867 | .absbit = { BIT(ABS_WHEEL) }, | |
868 | }, | |
869 | { | |
b126207c DT |
870 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
871 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
1da177e4 LT |
872 | .evbit = { BIT(EV_ABS) }, |
873 | .absbit = { BIT(ABS_THROTTLE) }, | |
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); |