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 | |
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 | { | |
162 | int retval; | |
d0ffb9be | 163 | struct joydev_client *client = file->private_data; |
1e0afb28 | 164 | |
d0ffb9be | 165 | retval = fasync_helper(fd, file, on, &client->fasync); |
1e0afb28 | 166 | |
1da177e4 LT |
167 | return retval < 0 ? retval : 0; |
168 | } | |
169 | ||
9657d75c | 170 | static void joydev_free(struct device *dev) |
1da177e4 | 171 | { |
9657d75c DT |
172 | struct joydev *joydev = container_of(dev, struct joydev, dev); |
173 | ||
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 LT |
245 | |
246 | joydev_fasync(-1, file, 0); | |
b126207c | 247 | joydev_detach_client(joydev, client); |
d0ffb9be | 248 | kfree(client); |
1da177e4 | 249 | |
b126207c | 250 | joydev_close_device(joydev); |
9657d75c | 251 | put_device(&joydev->dev); |
1da177e4 | 252 | |
1da177e4 LT |
253 | return 0; |
254 | } | |
255 | ||
256 | static int joydev_open(struct inode *inode, struct file *file) | |
257 | { | |
d0ffb9be DT |
258 | struct joydev_client *client; |
259 | struct joydev *joydev; | |
1da177e4 | 260 | int i = iminor(inode) - JOYDEV_MINOR_BASE; |
d542ed82 | 261 | int error; |
1da177e4 | 262 | |
d0ffb9be DT |
263 | if (i >= JOYDEV_MINORS) |
264 | return -ENODEV; | |
1da177e4 | 265 | |
b126207c DT |
266 | error = mutex_lock_interruptible(&joydev_table_mutex); |
267 | if (error) | |
268 | return error; | |
d0ffb9be | 269 | joydev = joydev_table[i]; |
b126207c DT |
270 | if (joydev) |
271 | get_device(&joydev->dev); | |
272 | mutex_unlock(&joydev_table_mutex); | |
1da177e4 | 273 | |
b126207c DT |
274 | if (!joydev) |
275 | return -ENODEV; | |
9657d75c | 276 | |
d0ffb9be | 277 | client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL); |
9657d75c DT |
278 | if (!client) { |
279 | error = -ENOMEM; | |
280 | goto err_put_joydev; | |
281 | } | |
1da177e4 | 282 | |
b126207c | 283 | spin_lock_init(&client->buffer_lock); |
d0ffb9be | 284 | client->joydev = joydev; |
b126207c | 285 | joydev_attach_client(joydev, client); |
1da177e4 | 286 | |
b126207c DT |
287 | error = joydev_open_device(joydev); |
288 | if (error) | |
289 | goto err_free_client; | |
1da177e4 | 290 | |
d0ffb9be | 291 | file->private_data = client; |
1da177e4 | 292 | return 0; |
9657d75c DT |
293 | |
294 | err_free_client: | |
b126207c | 295 | joydev_detach_client(joydev, client); |
9657d75c DT |
296 | kfree(client); |
297 | err_put_joydev: | |
298 | put_device(&joydev->dev); | |
299 | return error; | |
1da177e4 LT |
300 | } |
301 | ||
b126207c DT |
302 | static int joydev_generate_startup_event(struct joydev_client *client, |
303 | struct input_dev *input, | |
304 | struct js_event *event) | |
1da177e4 | 305 | { |
b126207c DT |
306 | struct joydev *joydev = client->joydev; |
307 | int have_event; | |
308 | ||
309 | spin_lock_irq(&client->buffer_lock); | |
310 | ||
311 | have_event = client->startup < joydev->nabs + joydev->nkey; | |
312 | ||
313 | if (have_event) { | |
314 | ||
315 | event->time = jiffies_to_msecs(jiffies); | |
316 | if (client->startup < joydev->nkey) { | |
317 | event->type = JS_EVENT_BUTTON | JS_EVENT_INIT; | |
318 | event->number = client->startup; | |
319 | event->value = !!test_bit(joydev->keypam[event->number], | |
320 | input->key); | |
321 | } else { | |
322 | event->type = JS_EVENT_AXIS | JS_EVENT_INIT; | |
323 | event->number = client->startup - joydev->nkey; | |
324 | event->value = joydev->abs[event->number]; | |
325 | } | |
326 | client->startup++; | |
327 | } | |
328 | ||
329 | spin_unlock_irq(&client->buffer_lock); | |
330 | ||
331 | return have_event; | |
332 | } | |
333 | ||
334 | static int joydev_fetch_next_event(struct joydev_client *client, | |
335 | struct js_event *event) | |
336 | { | |
337 | int have_event; | |
338 | ||
339 | spin_lock_irq(&client->buffer_lock); | |
340 | ||
341 | have_event = client->head != client->tail; | |
342 | if (have_event) { | |
343 | *event = client->buffer[client->tail++]; | |
344 | client->tail &= JOYDEV_BUFFER_SIZE - 1; | |
345 | } | |
346 | ||
347 | spin_unlock_irq(&client->buffer_lock); | |
348 | ||
349 | return have_event; | |
350 | } | |
351 | ||
352 | /* | |
353 | * Old joystick interface | |
354 | */ | |
355 | static ssize_t joydev_0x_read(struct joydev_client *client, | |
356 | struct input_dev *input, | |
357 | char __user *buf) | |
358 | { | |
359 | struct joydev *joydev = client->joydev; | |
360 | struct JS_DATA_TYPE data; | |
361 | int i; | |
362 | ||
363 | spin_lock_irq(&input->event_lock); | |
364 | ||
365 | /* | |
366 | * Get device state | |
367 | */ | |
368 | for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++) | |
369 | data.buttons |= | |
370 | test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0; | |
371 | data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x; | |
372 | data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y; | |
373 | ||
374 | /* | |
375 | * Reset reader's event queue | |
376 | */ | |
377 | spin_lock(&client->buffer_lock); | |
378 | client->startup = 0; | |
379 | client->tail = client->head; | |
380 | spin_unlock(&client->buffer_lock); | |
381 | ||
382 | spin_unlock_irq(&input->event_lock); | |
383 | ||
384 | if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE))) | |
385 | return -EFAULT; | |
386 | ||
387 | return sizeof(struct JS_DATA_TYPE); | |
1da177e4 LT |
388 | } |
389 | ||
b126207c DT |
390 | static inline int joydev_data_pending(struct joydev_client *client) |
391 | { | |
392 | struct joydev *joydev = client->joydev; | |
393 | ||
394 | return client->startup < joydev->nabs + joydev->nkey || | |
395 | client->head != client->tail; | |
396 | } | |
397 | ||
398 | static ssize_t joydev_read(struct file *file, char __user *buf, | |
399 | size_t count, loff_t *ppos) | |
1da177e4 | 400 | { |
d0ffb9be DT |
401 | struct joydev_client *client = file->private_data; |
402 | struct joydev *joydev = client->joydev; | |
1da177e4 | 403 | struct input_dev *input = joydev->handle.dev; |
b126207c DT |
404 | struct js_event event; |
405 | int retval; | |
1da177e4 | 406 | |
d0ffb9be | 407 | if (!joydev->exist) |
1da177e4 LT |
408 | return -ENODEV; |
409 | ||
410 | if (count < sizeof(struct js_event)) | |
411 | return -EINVAL; | |
412 | ||
b126207c DT |
413 | if (count == sizeof(struct JS_DATA_TYPE)) |
414 | return joydev_0x_read(client, input, buf); | |
1da177e4 | 415 | |
b126207c | 416 | if (!joydev_data_pending(client) && (file->f_flags & O_NONBLOCK)) |
1e0afb28 | 417 | return -EAGAIN; |
1da177e4 | 418 | |
d0ffb9be | 419 | retval = wait_event_interruptible(joydev->wait, |
b126207c | 420 | !joydev->exist || joydev_data_pending(client)); |
1da177e4 LT |
421 | if (retval) |
422 | return retval; | |
423 | ||
d0ffb9be | 424 | if (!joydev->exist) |
1da177e4 LT |
425 | return -ENODEV; |
426 | ||
b126207c DT |
427 | while (retval + sizeof(struct js_event) <= count && |
428 | joydev_generate_startup_event(client, input, &event)) { | |
1da177e4 LT |
429 | |
430 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) | |
431 | return -EFAULT; | |
432 | ||
1da177e4 LT |
433 | retval += sizeof(struct js_event); |
434 | } | |
435 | ||
b126207c DT |
436 | while (retval + sizeof(struct js_event) <= count && |
437 | joydev_fetch_next_event(client, &event)) { | |
1da177e4 | 438 | |
b126207c | 439 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) |
1da177e4 LT |
440 | return -EFAULT; |
441 | ||
1da177e4 LT |
442 | retval += sizeof(struct js_event); |
443 | } | |
444 | ||
445 | return retval; | |
446 | } | |
447 | ||
448 | /* No kernel lock - fine */ | |
449 | static unsigned int joydev_poll(struct file *file, poll_table *wait) | |
450 | { | |
d0ffb9be DT |
451 | struct joydev_client *client = file->private_data; |
452 | struct joydev *joydev = client->joydev; | |
1e0afb28 | 453 | |
d0ffb9be | 454 | poll_wait(file, &joydev->wait, wait); |
b126207c DT |
455 | return (joydev_data_pending(client) ? (POLLIN | POLLRDNORM) : 0) | |
456 | (joydev->exist ? 0 : (POLLHUP | POLLERR)); | |
1da177e4 LT |
457 | } |
458 | ||
b126207c DT |
459 | static int joydev_ioctl_common(struct joydev *joydev, |
460 | unsigned int cmd, void __user *argp) | |
1da177e4 | 461 | { |
1da177e4 | 462 | struct input_dev *dev = joydev->handle.dev; |
1da177e4 LT |
463 | int i, j; |
464 | ||
1da177e4 LT |
465 | switch (cmd) { |
466 | ||
b126207c DT |
467 | case JS_SET_CAL: |
468 | return copy_from_user(&joydev->glue.JS_CORR, argp, | |
024ac44c | 469 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 470 | |
b126207c DT |
471 | case JS_GET_CAL: |
472 | return copy_to_user(argp, &joydev->glue.JS_CORR, | |
024ac44c | 473 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 474 | |
b126207c DT |
475 | case JS_SET_TIMEOUT: |
476 | return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1e0afb28 | 477 | |
b126207c DT |
478 | case JS_GET_TIMEOUT: |
479 | return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1da177e4 | 480 | |
b126207c DT |
481 | case JSIOCGVERSION: |
482 | return put_user(JS_VERSION, (__u32 __user *) argp); | |
1e0afb28 | 483 | |
b126207c DT |
484 | case JSIOCGAXES: |
485 | return put_user(joydev->nabs, (__u8 __user *) argp); | |
1e0afb28 | 486 | |
b126207c DT |
487 | case JSIOCGBUTTONS: |
488 | return put_user(joydev->nkey, (__u8 __user *) argp); | |
1e0afb28 | 489 | |
b126207c DT |
490 | case JSIOCSCORR: |
491 | if (copy_from_user(joydev->corr, argp, | |
492 | sizeof(joydev->corr[0]) * joydev->nabs)) | |
493 | return -EFAULT; | |
1e0afb28 | 494 | |
b126207c DT |
495 | for (i = 0; i < joydev->nabs; i++) { |
496 | j = joydev->abspam[i]; | |
497 | joydev->abs[i] = joydev_correct(dev->abs[j], | |
498 | &joydev->corr[i]); | |
499 | } | |
500 | return 0; | |
1e0afb28 | 501 | |
b126207c DT |
502 | case JSIOCGCORR: |
503 | return copy_to_user(argp, joydev->corr, | |
504 | sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0; | |
505 | ||
506 | case JSIOCSAXMAP: | |
507 | if (copy_from_user(joydev->abspam, argp, | |
508 | sizeof(__u8) * (ABS_MAX + 1))) | |
509 | return -EFAULT; | |
510 | ||
511 | for (i = 0; i < joydev->nabs; i++) { | |
512 | if (joydev->abspam[i] > ABS_MAX) | |
513 | return -EINVAL; | |
514 | joydev->absmap[joydev->abspam[i]] = i; | |
515 | } | |
516 | return 0; | |
517 | ||
518 | case JSIOCGAXMAP: | |
519 | return copy_to_user(argp, joydev->abspam, | |
520 | sizeof(__u8) * (ABS_MAX + 1)) ? -EFAULT : 0; | |
521 | ||
522 | case JSIOCSBTNMAP: | |
523 | if (copy_from_user(joydev->keypam, argp, | |
524 | sizeof(__u16) * (KEY_MAX - BTN_MISC + 1))) | |
525 | return -EFAULT; | |
526 | ||
527 | for (i = 0; i < joydev->nkey; i++) { | |
528 | if (joydev->keypam[i] > KEY_MAX || | |
529 | joydev->keypam[i] < BTN_MISC) | |
530 | return -EINVAL; | |
531 | joydev->keymap[joydev->keypam[i] - BTN_MISC] = i; | |
532 | } | |
533 | ||
534 | return 0; | |
535 | ||
536 | case JSIOCGBTNMAP: | |
537 | return copy_to_user(argp, joydev->keypam, | |
538 | sizeof(__u16) * (KEY_MAX - BTN_MISC + 1)) ? -EFAULT : 0; | |
539 | ||
540 | default: | |
541 | if ((cmd & ~IOCSIZE_MASK) == JSIOCGNAME(0)) { | |
542 | int len; | |
543 | if (!dev->name) | |
544 | return 0; | |
545 | len = strlen(dev->name) + 1; | |
546 | if (len > _IOC_SIZE(cmd)) | |
547 | len = _IOC_SIZE(cmd); | |
548 | if (copy_to_user(argp, dev->name, len)) | |
1da177e4 | 549 | return -EFAULT; |
b126207c DT |
550 | return len; |
551 | } | |
1da177e4 LT |
552 | } |
553 | return -EINVAL; | |
554 | } | |
555 | ||
024ac44c | 556 | #ifdef CONFIG_COMPAT |
b126207c DT |
557 | static long joydev_compat_ioctl(struct file *file, |
558 | unsigned int cmd, unsigned long arg) | |
024ac44c | 559 | { |
d0ffb9be DT |
560 | struct joydev_client *client = file->private_data; |
561 | struct joydev *joydev = client->joydev; | |
024ac44c JF |
562 | void __user *argp = (void __user *)arg; |
563 | s32 tmp32; | |
564 | struct JS_DATA_SAVE_TYPE_32 ds32; | |
b126207c | 565 | int retval; |
024ac44c | 566 | |
b126207c DT |
567 | retval = mutex_lock_interruptible(&joydev->mutex); |
568 | if (retval) | |
569 | return retval; | |
570 | ||
571 | if (!joydev->exist) { | |
572 | retval = -ENODEV; | |
573 | goto out; | |
574 | } | |
575 | ||
576 | switch (cmd) { | |
1e0afb28 | 577 | |
024ac44c | 578 | case JS_SET_TIMELIMIT: |
b126207c DT |
579 | retval = get_user(tmp32, (s32 __user *) arg); |
580 | if (retval == 0) | |
024ac44c JF |
581 | joydev->glue.JS_TIMELIMIT = tmp32; |
582 | break; | |
b126207c | 583 | |
024ac44c JF |
584 | case JS_GET_TIMELIMIT: |
585 | tmp32 = joydev->glue.JS_TIMELIMIT; | |
b126207c | 586 | retval = put_user(tmp32, (s32 __user *) arg); |
024ac44c JF |
587 | break; |
588 | ||
589 | case JS_SET_ALL: | |
b126207c DT |
590 | retval = copy_from_user(&ds32, argp, |
591 | sizeof(ds32)) ? -EFAULT : 0; | |
592 | if (retval == 0) { | |
024ac44c JF |
593 | joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT; |
594 | joydev->glue.BUSY = ds32.BUSY; | |
595 | joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME; | |
596 | joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT; | |
597 | joydev->glue.JS_SAVE = ds32.JS_SAVE; | |
598 | joydev->glue.JS_CORR = ds32.JS_CORR; | |
599 | } | |
600 | break; | |
601 | ||
602 | case JS_GET_ALL: | |
603 | ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT; | |
604 | ds32.BUSY = joydev->glue.BUSY; | |
605 | ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME; | |
606 | ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT; | |
607 | ds32.JS_SAVE = joydev->glue.JS_SAVE; | |
608 | ds32.JS_CORR = joydev->glue.JS_CORR; | |
609 | ||
b126207c | 610 | retval = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0; |
024ac44c JF |
611 | break; |
612 | ||
613 | default: | |
b126207c DT |
614 | retval = joydev_ioctl_common(joydev, cmd, argp); |
615 | break; | |
024ac44c | 616 | } |
b126207c DT |
617 | |
618 | out: | |
619 | mutex_unlock(&joydev->mutex); | |
620 | return retval; | |
024ac44c JF |
621 | } |
622 | #endif /* CONFIG_COMPAT */ | |
623 | ||
b126207c DT |
624 | static long joydev_ioctl(struct file *file, |
625 | unsigned int cmd, unsigned long arg) | |
024ac44c | 626 | { |
d0ffb9be DT |
627 | struct joydev_client *client = file->private_data; |
628 | struct joydev *joydev = client->joydev; | |
024ac44c | 629 | void __user *argp = (void __user *)arg; |
b126207c | 630 | int retval; |
024ac44c | 631 | |
b126207c DT |
632 | retval = mutex_lock_interruptible(&joydev->mutex); |
633 | if (retval) | |
634 | return retval; | |
024ac44c | 635 | |
b126207c DT |
636 | if (!joydev->exist) { |
637 | retval = -ENODEV; | |
638 | goto out; | |
024ac44c | 639 | } |
b126207c DT |
640 | |
641 | switch (cmd) { | |
642 | ||
643 | case JS_SET_TIMELIMIT: | |
644 | retval = get_user(joydev->glue.JS_TIMELIMIT, | |
645 | (long __user *) arg); | |
646 | break; | |
647 | ||
648 | case JS_GET_TIMELIMIT: | |
649 | retval = put_user(joydev->glue.JS_TIMELIMIT, | |
650 | (long __user *) arg); | |
651 | break; | |
652 | ||
653 | case JS_SET_ALL: | |
654 | retval = copy_from_user(&joydev->glue, argp, | |
655 | sizeof(joydev->glue)) ? -EFAULT: 0; | |
656 | break; | |
657 | ||
658 | case JS_GET_ALL: | |
659 | retval = copy_to_user(argp, &joydev->glue, | |
660 | sizeof(joydev->glue)) ? -EFAULT : 0; | |
661 | break; | |
662 | ||
663 | default: | |
664 | retval = joydev_ioctl_common(joydev, cmd, argp); | |
665 | break; | |
666 | } | |
667 | out: | |
668 | mutex_unlock(&joydev->mutex); | |
669 | return retval; | |
024ac44c JF |
670 | } |
671 | ||
66e66118 | 672 | static const struct file_operations joydev_fops = { |
b126207c DT |
673 | .owner = THIS_MODULE, |
674 | .read = joydev_read, | |
675 | .poll = joydev_poll, | |
676 | .open = joydev_open, | |
677 | .release = joydev_release, | |
678 | .unlocked_ioctl = joydev_ioctl, | |
024ac44c | 679 | #ifdef CONFIG_COMPAT |
b126207c | 680 | .compat_ioctl = joydev_compat_ioctl, |
024ac44c | 681 | #endif |
b126207c | 682 | .fasync = joydev_fasync, |
1da177e4 LT |
683 | }; |
684 | ||
b126207c DT |
685 | static int joydev_install_chrdev(struct joydev *joydev) |
686 | { | |
687 | joydev_table[joydev->minor] = joydev; | |
688 | return 0; | |
689 | } | |
690 | ||
691 | static void joydev_remove_chrdev(struct joydev *joydev) | |
692 | { | |
693 | mutex_lock(&joydev_table_mutex); | |
694 | joydev_table[joydev->minor] = NULL; | |
695 | mutex_unlock(&joydev_table_mutex); | |
696 | } | |
697 | ||
698 | /* | |
699 | * Mark device non-existant. This disables writes, ioctls and | |
700 | * prevents new users from opening the device. Already posted | |
701 | * blocking reads will stay, however new ones will fail. | |
702 | */ | |
703 | static void joydev_mark_dead(struct joydev *joydev) | |
704 | { | |
705 | mutex_lock(&joydev->mutex); | |
706 | joydev->exist = 0; | |
707 | mutex_unlock(&joydev->mutex); | |
708 | } | |
709 | ||
710 | static void joydev_cleanup(struct joydev *joydev) | |
711 | { | |
712 | struct input_handle *handle = &joydev->handle; | |
713 | ||
714 | joydev_mark_dead(joydev); | |
715 | joydev_hangup(joydev); | |
716 | joydev_remove_chrdev(joydev); | |
717 | ||
718 | /* joydev is marked dead so noone else accesses joydev->open */ | |
719 | if (joydev->open) | |
720 | input_close_device(handle); | |
721 | } | |
722 | ||
5b2a0826 DT |
723 | static int joydev_connect(struct input_handler *handler, struct input_dev *dev, |
724 | const struct input_device_id *id) | |
1da177e4 LT |
725 | { |
726 | struct joydev *joydev; | |
727 | int i, j, t, minor; | |
5b2a0826 | 728 | int error; |
1da177e4 | 729 | |
b126207c DT |
730 | for (minor = 0; minor < JOYDEV_MINORS; minor++) |
731 | if (!joydev_table[minor]) | |
732 | break; | |
733 | ||
1da177e4 LT |
734 | if (minor == JOYDEV_MINORS) { |
735 | printk(KERN_ERR "joydev: no more free joydev devices\n"); | |
5b2a0826 | 736 | return -ENFILE; |
1da177e4 LT |
737 | } |
738 | ||
5b2a0826 DT |
739 | joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL); |
740 | if (!joydev) | |
741 | return -ENOMEM; | |
1da177e4 | 742 | |
d0ffb9be | 743 | INIT_LIST_HEAD(&joydev->client_list); |
b126207c DT |
744 | spin_lock_init(&joydev->client_lock); |
745 | mutex_init(&joydev->mutex); | |
1da177e4 LT |
746 | init_waitqueue_head(&joydev->wait); |
747 | ||
b126207c DT |
748 | snprintf(joydev->name, sizeof(joydev->name), "js%d", minor); |
749 | joydev->exist = 1; | |
1da177e4 | 750 | joydev->minor = minor; |
b126207c | 751 | |
1da177e4 LT |
752 | joydev->exist = 1; |
753 | joydev->handle.dev = dev; | |
754 | joydev->handle.name = joydev->name; | |
755 | joydev->handle.handler = handler; | |
756 | joydev->handle.private = joydev; | |
1da177e4 LT |
757 | |
758 | for (i = 0; i < ABS_MAX + 1; i++) | |
759 | if (test_bit(i, dev->absbit)) { | |
760 | joydev->absmap[i] = joydev->nabs; | |
761 | joydev->abspam[joydev->nabs] = i; | |
762 | joydev->nabs++; | |
763 | } | |
764 | ||
765 | for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++) | |
766 | if (test_bit(i + BTN_MISC, dev->keybit)) { | |
767 | joydev->keymap[i] = joydev->nkey; | |
768 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
769 | joydev->nkey++; | |
770 | } | |
771 | ||
f24949e8 | 772 | for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++) |
1da177e4 LT |
773 | if (test_bit(i + BTN_MISC, dev->keybit)) { |
774 | joydev->keymap[i] = joydev->nkey; | |
775 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
776 | joydev->nkey++; | |
777 | } | |
778 | ||
779 | for (i = 0; i < joydev->nabs; i++) { | |
780 | j = joydev->abspam[i]; | |
781 | if (dev->absmax[j] == dev->absmin[j]) { | |
782 | joydev->corr[i].type = JS_CORR_NONE; | |
783 | joydev->abs[i] = dev->abs[j]; | |
784 | continue; | |
785 | } | |
786 | joydev->corr[i].type = JS_CORR_BROKEN; | |
787 | joydev->corr[i].prec = dev->absfuzz[j]; | |
b126207c DT |
788 | joydev->corr[i].coef[0] = |
789 | (dev->absmax[j] + dev->absmin[j]) / 2 - dev->absflat[j]; | |
790 | joydev->corr[i].coef[1] = | |
791 | (dev->absmax[j] + dev->absmin[j]) / 2 + dev->absflat[j]; | |
792 | ||
793 | t = (dev->absmax[j] - dev->absmin[j]) / 2 - 2 * dev->absflat[j]; | |
794 | if (t) { | |
795 | joydev->corr[i].coef[2] = (1 << 29) / t; | |
796 | joydev->corr[i].coef[3] = (1 << 29) / t; | |
797 | ||
798 | joydev->abs[i] = joydev_correct(dev->abs[j], | |
799 | joydev->corr + i); | |
800 | } | |
1da177e4 LT |
801 | } |
802 | ||
b126207c DT |
803 | strlcpy(joydev->dev.bus_id, joydev->name, sizeof(joydev->dev.bus_id)); |
804 | joydev->dev.devt = MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor); | |
9657d75c DT |
805 | joydev->dev.class = &input_class; |
806 | joydev->dev.parent = &dev->dev; | |
9657d75c DT |
807 | joydev->dev.release = joydev_free; |
808 | device_initialize(&joydev->dev); | |
5b2a0826 | 809 | |
b126207c | 810 | error = input_register_handle(&joydev->handle); |
5b2a0826 | 811 | if (error) |
9657d75c | 812 | goto err_free_joydev; |
5b2a0826 | 813 | |
b126207c | 814 | error = joydev_install_chrdev(joydev); |
5b2a0826 | 815 | if (error) |
b126207c DT |
816 | goto err_unregister_handle; |
817 | ||
818 | error = device_add(&joydev->dev); | |
819 | if (error) | |
820 | goto err_cleanup_joydev; | |
5b2a0826 DT |
821 | |
822 | return 0; | |
1da177e4 | 823 | |
b126207c DT |
824 | err_cleanup_joydev: |
825 | joydev_cleanup(joydev); | |
826 | err_unregister_handle: | |
827 | input_unregister_handle(&joydev->handle); | |
5b2a0826 | 828 | err_free_joydev: |
9657d75c | 829 | put_device(&joydev->dev); |
5b2a0826 | 830 | return error; |
1da177e4 LT |
831 | } |
832 | ||
833 | static void joydev_disconnect(struct input_handle *handle) | |
834 | { | |
835 | struct joydev *joydev = handle->private; | |
1da177e4 | 836 | |
9657d75c | 837 | device_del(&joydev->dev); |
b126207c DT |
838 | joydev_cleanup(joydev); |
839 | input_unregister_handle(handle); | |
9657d75c | 840 | put_device(&joydev->dev); |
1da177e4 LT |
841 | } |
842 | ||
66e66118 | 843 | static const struct input_device_id joydev_blacklist[] = { |
1da177e4 | 844 | { |
b126207c DT |
845 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
846 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
7b19ada2 JS |
847 | .evbit = { BIT_MASK(EV_KEY) }, |
848 | .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) }, | |
1e0afb28 DT |
849 | }, /* Avoid itouchpads, touchscreens and tablets */ |
850 | { } /* Terminating entry */ | |
1da177e4 LT |
851 | }; |
852 | ||
66e66118 | 853 | static const struct input_device_id joydev_ids[] = { |
1da177e4 | 854 | { |
b126207c DT |
855 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
856 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
857 | .evbit = { BIT_MASK(EV_ABS) }, |
858 | .absbit = { BIT_MASK(ABS_X) }, | |
1da177e4 LT |
859 | }, |
860 | { | |
b126207c DT |
861 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
862 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
863 | .evbit = { BIT_MASK(EV_ABS) }, |
864 | .absbit = { BIT_MASK(ABS_WHEEL) }, | |
1da177e4 LT |
865 | }, |
866 | { | |
b126207c DT |
867 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
868 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
869 | .evbit = { BIT_MASK(EV_ABS) }, |
870 | .absbit = { BIT_MASK(ABS_THROTTLE) }, | |
1da177e4 | 871 | }, |
1e0afb28 | 872 | { } /* Terminating entry */ |
1da177e4 LT |
873 | }; |
874 | ||
875 | MODULE_DEVICE_TABLE(input, joydev_ids); | |
876 | ||
877 | static struct input_handler joydev_handler = { | |
b126207c DT |
878 | .event = joydev_event, |
879 | .connect = joydev_connect, | |
880 | .disconnect = joydev_disconnect, | |
881 | .fops = &joydev_fops, | |
882 | .minor = JOYDEV_MINOR_BASE, | |
883 | .name = "joydev", | |
884 | .id_table = joydev_ids, | |
885 | .blacklist = joydev_blacklist, | |
1da177e4 LT |
886 | }; |
887 | ||
888 | static int __init joydev_init(void) | |
889 | { | |
4263cf0f | 890 | return input_register_handler(&joydev_handler); |
1da177e4 LT |
891 | } |
892 | ||
893 | static void __exit joydev_exit(void) | |
894 | { | |
895 | input_unregister_handler(&joydev_handler); | |
896 | } | |
897 | ||
898 | module_init(joydev_init); | |
899 | module_exit(joydev_exit); |