Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Joystick device driver for the input driver suite. | |
3 | * | |
4 | * Copyright (c) 1999-2002 Vojtech Pavlik | |
5 | * Copyright (c) 1999 Colin Van Dyke | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | */ | |
12 | ||
da0c4901 JP |
13 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
14 | ||
1da177e4 | 15 | #include <asm/io.h> |
1da177e4 LT |
16 | #include <linux/delay.h> |
17 | #include <linux/errno.h> | |
18 | #include <linux/joystick.h> | |
19 | #include <linux/input.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/major.h> | |
a99bbaf5 | 22 | #include <linux/sched.h> |
1da177e4 LT |
23 | #include <linux/slab.h> |
24 | #include <linux/mm.h> | |
25 | #include <linux/miscdevice.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/poll.h> | |
28 | #include <linux/init.h> | |
1da177e4 | 29 | #include <linux/device.h> |
7f8d4cad | 30 | #include <linux/cdev.h> |
1da177e4 LT |
31 | |
32 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
33 | MODULE_DESCRIPTION("Joystick device interfaces"); | |
34 | MODULE_SUPPORTED_DEVICE("input/js"); | |
35 | MODULE_LICENSE("GPL"); | |
36 | ||
37 | #define JOYDEV_MINOR_BASE 0 | |
38 | #define JOYDEV_MINORS 16 | |
39 | #define JOYDEV_BUFFER_SIZE 64 | |
40 | ||
1da177e4 | 41 | struct joydev { |
1da177e4 | 42 | int open; |
1da177e4 LT |
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 | 48 | struct device dev; |
7f8d4cad | 49 | struct cdev cdev; |
20da92de | 50 | bool exist; |
9657d75c | 51 | |
81c2a3ba | 52 | struct js_corr corr[ABS_CNT]; |
1da177e4 LT |
53 | struct JS_DATA_SAVE_TYPE glue; |
54 | int nabs; | |
55 | int nkey; | |
56 | __u16 keymap[KEY_MAX - BTN_MISC + 1]; | |
57 | __u16 keypam[KEY_MAX - BTN_MISC + 1]; | |
81c2a3ba DM |
58 | __u8 absmap[ABS_CNT]; |
59 | __u8 abspam[ABS_CNT]; | |
60 | __s16 abs[ABS_CNT]; | |
1da177e4 LT |
61 | }; |
62 | ||
d0ffb9be | 63 | struct joydev_client { |
1da177e4 LT |
64 | struct js_event buffer[JOYDEV_BUFFER_SIZE]; |
65 | int head; | |
66 | int tail; | |
67 | int startup; | |
b126207c | 68 | spinlock_t buffer_lock; /* protects access to buffer, head and tail */ |
1da177e4 LT |
69 | struct fasync_struct *fasync; |
70 | struct joydev *joydev; | |
71 | struct list_head node; | |
72 | }; | |
73 | ||
1da177e4 LT |
74 | static int joydev_correct(int value, struct js_corr *corr) |
75 | { | |
76 | switch (corr->type) { | |
b126207c DT |
77 | |
78 | case JS_CORR_NONE: | |
79 | break; | |
80 | ||
81 | case JS_CORR_BROKEN: | |
82 | value = value > corr->coef[0] ? (value < corr->coef[1] ? 0 : | |
83 | ((corr->coef[3] * (value - corr->coef[1])) >> 14)) : | |
84 | ((corr->coef[2] * (value - corr->coef[0])) >> 14); | |
85 | break; | |
86 | ||
87 | default: | |
88 | return 0; | |
1da177e4 LT |
89 | } |
90 | ||
1e0afb28 | 91 | return value < -32767 ? -32767 : (value > 32767 ? 32767 : value); |
1da177e4 LT |
92 | } |
93 | ||
b126207c DT |
94 | static void joydev_pass_event(struct joydev_client *client, |
95 | struct js_event *event) | |
96 | { | |
97 | struct joydev *joydev = client->joydev; | |
98 | ||
99 | /* | |
100 | * IRQs already disabled, just acquire the lock | |
101 | */ | |
102 | spin_lock(&client->buffer_lock); | |
103 | ||
104 | client->buffer[client->head] = *event; | |
105 | ||
106 | if (client->startup == joydev->nabs + joydev->nkey) { | |
107 | client->head++; | |
108 | client->head &= JOYDEV_BUFFER_SIZE - 1; | |
109 | if (client->tail == client->head) | |
110 | client->startup = 0; | |
111 | } | |
112 | ||
113 | spin_unlock(&client->buffer_lock); | |
114 | ||
115 | kill_fasync(&client->fasync, SIGIO, POLL_IN); | |
116 | } | |
117 | ||
118 | static void joydev_event(struct input_handle *handle, | |
119 | unsigned int type, unsigned int code, int value) | |
1da177e4 LT |
120 | { |
121 | struct joydev *joydev = handle->private; | |
d0ffb9be | 122 | struct joydev_client *client; |
1da177e4 LT |
123 | struct js_event event; |
124 | ||
125 | switch (type) { | |
126 | ||
b126207c DT |
127 | case EV_KEY: |
128 | if (code < BTN_MISC || value == 2) | |
129 | return; | |
130 | event.type = JS_EVENT_BUTTON; | |
131 | event.number = joydev->keymap[code - BTN_MISC]; | |
132 | event.value = value; | |
133 | break; | |
1da177e4 | 134 | |
b126207c DT |
135 | case EV_ABS: |
136 | event.type = JS_EVENT_AXIS; | |
137 | event.number = joydev->absmap[code]; | |
138 | event.value = joydev_correct(value, | |
139 | &joydev->corr[event.number]); | |
140 | if (event.value == joydev->abs[event.number]) | |
1da177e4 | 141 | return; |
b126207c DT |
142 | joydev->abs[event.number] = event.value; |
143 | break; | |
144 | ||
145 | default: | |
146 | return; | |
1da177e4 LT |
147 | } |
148 | ||
6f5eacfc | 149 | event.time = jiffies_to_msecs(jiffies); |
1da177e4 | 150 | |
82ba56c2 | 151 | rcu_read_lock(); |
b126207c DT |
152 | list_for_each_entry_rcu(client, &joydev->client_list, node) |
153 | joydev_pass_event(client, &event); | |
82ba56c2 | 154 | rcu_read_unlock(); |
1da177e4 LT |
155 | |
156 | wake_up_interruptible(&joydev->wait); | |
157 | } | |
158 | ||
159 | static int joydev_fasync(int fd, struct file *file, int on) | |
160 | { | |
d0ffb9be | 161 | struct joydev_client *client = file->private_data; |
1e0afb28 | 162 | |
60aa4924 | 163 | return fasync_helper(fd, file, on, &client->fasync); |
1da177e4 LT |
164 | } |
165 | ||
9657d75c | 166 | static void joydev_free(struct device *dev) |
1da177e4 | 167 | { |
9657d75c DT |
168 | struct joydev *joydev = container_of(dev, struct joydev, dev); |
169 | ||
a7097ff8 | 170 | input_put_device(joydev->handle.dev); |
1da177e4 LT |
171 | kfree(joydev); |
172 | } | |
173 | ||
b126207c DT |
174 | static void joydev_attach_client(struct joydev *joydev, |
175 | struct joydev_client *client) | |
176 | { | |
177 | spin_lock(&joydev->client_lock); | |
178 | list_add_tail_rcu(&client->node, &joydev->client_list); | |
179 | spin_unlock(&joydev->client_lock); | |
b126207c DT |
180 | } |
181 | ||
182 | static void joydev_detach_client(struct joydev *joydev, | |
183 | struct joydev_client *client) | |
184 | { | |
185 | spin_lock(&joydev->client_lock); | |
186 | list_del_rcu(&client->node); | |
187 | spin_unlock(&joydev->client_lock); | |
82ba56c2 | 188 | synchronize_rcu(); |
b126207c DT |
189 | } |
190 | ||
191 | static int joydev_open_device(struct joydev *joydev) | |
192 | { | |
193 | int retval; | |
194 | ||
195 | retval = mutex_lock_interruptible(&joydev->mutex); | |
196 | if (retval) | |
197 | return retval; | |
198 | ||
199 | if (!joydev->exist) | |
200 | retval = -ENODEV; | |
06445014 | 201 | else if (!joydev->open++) { |
b126207c | 202 | retval = input_open_device(&joydev->handle); |
06445014 ON |
203 | if (retval) |
204 | joydev->open--; | |
205 | } | |
b126207c DT |
206 | |
207 | mutex_unlock(&joydev->mutex); | |
208 | return retval; | |
209 | } | |
210 | ||
211 | static void joydev_close_device(struct joydev *joydev) | |
212 | { | |
213 | mutex_lock(&joydev->mutex); | |
214 | ||
215 | if (joydev->exist && !--joydev->open) | |
216 | input_close_device(&joydev->handle); | |
217 | ||
218 | mutex_unlock(&joydev->mutex); | |
219 | } | |
220 | ||
221 | /* | |
222 | * Wake up users waiting for IO so they can disconnect from | |
223 | * dead device. | |
224 | */ | |
225 | static void joydev_hangup(struct joydev *joydev) | |
226 | { | |
227 | struct joydev_client *client; | |
228 | ||
229 | spin_lock(&joydev->client_lock); | |
230 | list_for_each_entry(client, &joydev->client_list, node) | |
231 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
232 | spin_unlock(&joydev->client_lock); | |
233 | ||
234 | wake_up_interruptible(&joydev->wait); | |
235 | } | |
236 | ||
d0ffb9be | 237 | static int joydev_release(struct inode *inode, struct file *file) |
1da177e4 | 238 | { |
d0ffb9be DT |
239 | struct joydev_client *client = file->private_data; |
240 | struct joydev *joydev = client->joydev; | |
1da177e4 | 241 | |
b126207c | 242 | joydev_detach_client(joydev, client); |
d0ffb9be | 243 | kfree(client); |
1da177e4 | 244 | |
b126207c | 245 | joydev_close_device(joydev); |
1da177e4 | 246 | |
1da177e4 LT |
247 | return 0; |
248 | } | |
249 | ||
250 | static int joydev_open(struct inode *inode, struct file *file) | |
251 | { | |
7f8d4cad DT |
252 | struct joydev *joydev = |
253 | container_of(inode->i_cdev, struct joydev, cdev); | |
d0ffb9be | 254 | struct joydev_client *client; |
d542ed82 | 255 | int error; |
1da177e4 | 256 | |
d0ffb9be | 257 | client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL); |
7f8d4cad DT |
258 | if (!client) |
259 | return -ENOMEM; | |
1da177e4 | 260 | |
b126207c | 261 | spin_lock_init(&client->buffer_lock); |
d0ffb9be | 262 | client->joydev = joydev; |
b126207c | 263 | joydev_attach_client(joydev, client); |
1da177e4 | 264 | |
b126207c DT |
265 | error = joydev_open_device(joydev); |
266 | if (error) | |
267 | goto err_free_client; | |
1da177e4 | 268 | |
d0ffb9be | 269 | file->private_data = client; |
3d7bbd45 DT |
270 | nonseekable_open(inode, file); |
271 | ||
1da177e4 | 272 | return 0; |
9657d75c DT |
273 | |
274 | err_free_client: | |
b126207c | 275 | joydev_detach_client(joydev, client); |
9657d75c | 276 | kfree(client); |
9657d75c | 277 | return error; |
1da177e4 LT |
278 | } |
279 | ||
b126207c DT |
280 | static int joydev_generate_startup_event(struct joydev_client *client, |
281 | struct input_dev *input, | |
282 | struct js_event *event) | |
1da177e4 | 283 | { |
b126207c DT |
284 | struct joydev *joydev = client->joydev; |
285 | int have_event; | |
286 | ||
287 | spin_lock_irq(&client->buffer_lock); | |
288 | ||
289 | have_event = client->startup < joydev->nabs + joydev->nkey; | |
290 | ||
291 | if (have_event) { | |
292 | ||
293 | event->time = jiffies_to_msecs(jiffies); | |
294 | if (client->startup < joydev->nkey) { | |
295 | event->type = JS_EVENT_BUTTON | JS_EVENT_INIT; | |
296 | event->number = client->startup; | |
297 | event->value = !!test_bit(joydev->keypam[event->number], | |
298 | input->key); | |
299 | } else { | |
300 | event->type = JS_EVENT_AXIS | JS_EVENT_INIT; | |
301 | event->number = client->startup - joydev->nkey; | |
302 | event->value = joydev->abs[event->number]; | |
303 | } | |
304 | client->startup++; | |
305 | } | |
306 | ||
307 | spin_unlock_irq(&client->buffer_lock); | |
308 | ||
309 | return have_event; | |
310 | } | |
311 | ||
312 | static int joydev_fetch_next_event(struct joydev_client *client, | |
313 | struct js_event *event) | |
314 | { | |
315 | int have_event; | |
316 | ||
317 | spin_lock_irq(&client->buffer_lock); | |
318 | ||
319 | have_event = client->head != client->tail; | |
320 | if (have_event) { | |
321 | *event = client->buffer[client->tail++]; | |
322 | client->tail &= JOYDEV_BUFFER_SIZE - 1; | |
323 | } | |
324 | ||
325 | spin_unlock_irq(&client->buffer_lock); | |
326 | ||
327 | return have_event; | |
328 | } | |
329 | ||
330 | /* | |
331 | * Old joystick interface | |
332 | */ | |
333 | static ssize_t joydev_0x_read(struct joydev_client *client, | |
334 | struct input_dev *input, | |
335 | char __user *buf) | |
336 | { | |
337 | struct joydev *joydev = client->joydev; | |
338 | struct JS_DATA_TYPE data; | |
339 | int i; | |
340 | ||
341 | spin_lock_irq(&input->event_lock); | |
342 | ||
343 | /* | |
344 | * Get device state | |
345 | */ | |
346 | for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++) | |
347 | data.buttons |= | |
348 | test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0; | |
349 | data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x; | |
350 | data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y; | |
351 | ||
352 | /* | |
353 | * Reset reader's event queue | |
354 | */ | |
355 | spin_lock(&client->buffer_lock); | |
356 | client->startup = 0; | |
357 | client->tail = client->head; | |
358 | spin_unlock(&client->buffer_lock); | |
359 | ||
360 | spin_unlock_irq(&input->event_lock); | |
361 | ||
362 | if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE))) | |
363 | return -EFAULT; | |
364 | ||
365 | return sizeof(struct JS_DATA_TYPE); | |
1da177e4 LT |
366 | } |
367 | ||
b126207c DT |
368 | static inline int joydev_data_pending(struct joydev_client *client) |
369 | { | |
370 | struct joydev *joydev = client->joydev; | |
371 | ||
372 | return client->startup < joydev->nabs + joydev->nkey || | |
373 | client->head != client->tail; | |
374 | } | |
375 | ||
376 | static ssize_t joydev_read(struct file *file, char __user *buf, | |
377 | size_t count, loff_t *ppos) | |
1da177e4 | 378 | { |
d0ffb9be DT |
379 | struct joydev_client *client = file->private_data; |
380 | struct joydev *joydev = client->joydev; | |
1da177e4 | 381 | struct input_dev *input = joydev->handle.dev; |
b126207c DT |
382 | struct js_event event; |
383 | int retval; | |
1da177e4 | 384 | |
d0ffb9be | 385 | if (!joydev->exist) |
1da177e4 LT |
386 | return -ENODEV; |
387 | ||
388 | if (count < sizeof(struct js_event)) | |
389 | return -EINVAL; | |
390 | ||
b126207c DT |
391 | if (count == sizeof(struct JS_DATA_TYPE)) |
392 | return joydev_0x_read(client, input, buf); | |
1da177e4 | 393 | |
b126207c | 394 | if (!joydev_data_pending(client) && (file->f_flags & O_NONBLOCK)) |
1e0afb28 | 395 | return -EAGAIN; |
1da177e4 | 396 | |
d0ffb9be | 397 | retval = wait_event_interruptible(joydev->wait, |
b126207c | 398 | !joydev->exist || joydev_data_pending(client)); |
1da177e4 LT |
399 | if (retval) |
400 | return retval; | |
401 | ||
d0ffb9be | 402 | if (!joydev->exist) |
1da177e4 LT |
403 | return -ENODEV; |
404 | ||
b126207c DT |
405 | while (retval + sizeof(struct js_event) <= count && |
406 | joydev_generate_startup_event(client, input, &event)) { | |
1da177e4 LT |
407 | |
408 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) | |
409 | return -EFAULT; | |
410 | ||
1da177e4 LT |
411 | retval += sizeof(struct js_event); |
412 | } | |
413 | ||
b126207c DT |
414 | while (retval + sizeof(struct js_event) <= count && |
415 | joydev_fetch_next_event(client, &event)) { | |
1da177e4 | 416 | |
b126207c | 417 | if (copy_to_user(buf + retval, &event, sizeof(struct js_event))) |
1da177e4 LT |
418 | return -EFAULT; |
419 | ||
1da177e4 LT |
420 | retval += sizeof(struct js_event); |
421 | } | |
422 | ||
423 | return retval; | |
424 | } | |
425 | ||
426 | /* No kernel lock - fine */ | |
427 | static unsigned int joydev_poll(struct file *file, poll_table *wait) | |
428 | { | |
d0ffb9be DT |
429 | struct joydev_client *client = file->private_data; |
430 | struct joydev *joydev = client->joydev; | |
1e0afb28 | 431 | |
d0ffb9be | 432 | poll_wait(file, &joydev->wait, wait); |
b126207c DT |
433 | return (joydev_data_pending(client) ? (POLLIN | POLLRDNORM) : 0) | |
434 | (joydev->exist ? 0 : (POLLHUP | POLLERR)); | |
1da177e4 LT |
435 | } |
436 | ||
999b874f SK |
437 | static int joydev_handle_JSIOCSAXMAP(struct joydev *joydev, |
438 | void __user *argp, size_t len) | |
439 | { | |
440 | __u8 *abspam; | |
441 | int i; | |
442 | int retval = 0; | |
443 | ||
444 | len = min(len, sizeof(joydev->abspam)); | |
445 | ||
446 | /* Validate the map. */ | |
5702222c | 447 | abspam = memdup_user(argp, len); |
5b21e3c7 JMC |
448 | if (IS_ERR(abspam)) |
449 | return PTR_ERR(abspam); | |
999b874f SK |
450 | |
451 | for (i = 0; i < joydev->nabs; i++) { | |
452 | if (abspam[i] > ABS_MAX) { | |
453 | retval = -EINVAL; | |
454 | goto out; | |
455 | } | |
456 | } | |
457 | ||
458 | memcpy(joydev->abspam, abspam, len); | |
459 | ||
d2520a42 KW |
460 | for (i = 0; i < joydev->nabs; i++) |
461 | joydev->absmap[joydev->abspam[i]] = i; | |
462 | ||
999b874f SK |
463 | out: |
464 | kfree(abspam); | |
465 | return retval; | |
466 | } | |
467 | ||
468 | static int joydev_handle_JSIOCSBTNMAP(struct joydev *joydev, | |
469 | void __user *argp, size_t len) | |
470 | { | |
471 | __u16 *keypam; | |
472 | int i; | |
473 | int retval = 0; | |
474 | ||
475 | len = min(len, sizeof(joydev->keypam)); | |
476 | ||
477 | /* Validate the map. */ | |
5702222c | 478 | keypam = memdup_user(argp, len); |
5b21e3c7 JMC |
479 | if (IS_ERR(keypam)) |
480 | return PTR_ERR(keypam); | |
999b874f SK |
481 | |
482 | for (i = 0; i < joydev->nkey; i++) { | |
483 | if (keypam[i] > KEY_MAX || keypam[i] < BTN_MISC) { | |
484 | retval = -EINVAL; | |
485 | goto out; | |
486 | } | |
487 | } | |
488 | ||
489 | memcpy(joydev->keypam, keypam, len); | |
490 | ||
491 | for (i = 0; i < joydev->nkey; i++) | |
492 | joydev->keymap[keypam[i] - BTN_MISC] = i; | |
493 | ||
494 | out: | |
495 | kfree(keypam); | |
496 | return retval; | |
497 | } | |
498 | ||
499 | ||
b126207c DT |
500 | static int joydev_ioctl_common(struct joydev *joydev, |
501 | unsigned int cmd, void __user *argp) | |
1da177e4 | 502 | { |
1da177e4 | 503 | struct input_dev *dev = joydev->handle.dev; |
ec8b4b70 | 504 | size_t len; |
987a6c02 | 505 | int i; |
ec8b4b70 | 506 | const char *name; |
1da177e4 | 507 | |
ec8b4b70 | 508 | /* Process fixed-sized commands. */ |
1da177e4 LT |
509 | switch (cmd) { |
510 | ||
b126207c DT |
511 | case JS_SET_CAL: |
512 | return copy_from_user(&joydev->glue.JS_CORR, argp, | |
024ac44c | 513 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 514 | |
b126207c DT |
515 | case JS_GET_CAL: |
516 | return copy_to_user(argp, &joydev->glue.JS_CORR, | |
024ac44c | 517 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 518 | |
b126207c DT |
519 | case JS_SET_TIMEOUT: |
520 | return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1e0afb28 | 521 | |
b126207c DT |
522 | case JS_GET_TIMEOUT: |
523 | return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1da177e4 | 524 | |
b126207c DT |
525 | case JSIOCGVERSION: |
526 | return put_user(JS_VERSION, (__u32 __user *) argp); | |
1e0afb28 | 527 | |
b126207c DT |
528 | case JSIOCGAXES: |
529 | return put_user(joydev->nabs, (__u8 __user *) argp); | |
1e0afb28 | 530 | |
b126207c DT |
531 | case JSIOCGBUTTONS: |
532 | return put_user(joydev->nkey, (__u8 __user *) argp); | |
1e0afb28 | 533 | |
b126207c DT |
534 | case JSIOCSCORR: |
535 | if (copy_from_user(joydev->corr, argp, | |
536 | sizeof(joydev->corr[0]) * joydev->nabs)) | |
987a6c02 | 537 | return -EFAULT; |
1e0afb28 | 538 | |
b126207c | 539 | for (i = 0; i < joydev->nabs; i++) { |
987a6c02 DM |
540 | int val = input_abs_get_val(dev, joydev->abspam[i]); |
541 | joydev->abs[i] = joydev_correct(val, &joydev->corr[i]); | |
b126207c DT |
542 | } |
543 | return 0; | |
1e0afb28 | 544 | |
b126207c DT |
545 | case JSIOCGCORR: |
546 | return copy_to_user(argp, joydev->corr, | |
547 | sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0; | |
548 | ||
ec8b4b70 SK |
549 | } |
550 | ||
551 | /* | |
552 | * Process variable-sized commands (the axis and button map commands | |
553 | * are considered variable-sized to decouple them from the values of | |
554 | * ABS_MAX and KEY_MAX). | |
555 | */ | |
556 | switch (cmd & ~IOCSIZE_MASK) { | |
557 | ||
558 | case (JSIOCSAXMAP & ~IOCSIZE_MASK): | |
999b874f | 559 | return joydev_handle_JSIOCSAXMAP(joydev, argp, _IOC_SIZE(cmd)); |
b126207c | 560 | |
ec8b4b70 SK |
561 | case (JSIOCGAXMAP & ~IOCSIZE_MASK): |
562 | len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->abspam)); | |
999b874f | 563 | return copy_to_user(argp, joydev->abspam, len) ? -EFAULT : len; |
ec8b4b70 SK |
564 | |
565 | case (JSIOCSBTNMAP & ~IOCSIZE_MASK): | |
999b874f | 566 | return joydev_handle_JSIOCSBTNMAP(joydev, argp, _IOC_SIZE(cmd)); |
b126207c | 567 | |
ec8b4b70 SK |
568 | case (JSIOCGBTNMAP & ~IOCSIZE_MASK): |
569 | len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->keypam)); | |
999b874f | 570 | return copy_to_user(argp, joydev->keypam, len) ? -EFAULT : len; |
b126207c | 571 | |
ec8b4b70 SK |
572 | case JSIOCGNAME(0): |
573 | name = dev->name; | |
574 | if (!name) | |
575 | return 0; | |
576 | ||
577 | len = min_t(size_t, _IOC_SIZE(cmd), strlen(name) + 1); | |
578 | return copy_to_user(argp, name, len) ? -EFAULT : len; | |
1da177e4 | 579 | } |
ec8b4b70 | 580 | |
1da177e4 LT |
581 | return -EINVAL; |
582 | } | |
583 | ||
024ac44c | 584 | #ifdef CONFIG_COMPAT |
b126207c DT |
585 | static long joydev_compat_ioctl(struct file *file, |
586 | unsigned int cmd, unsigned long arg) | |
024ac44c | 587 | { |
d0ffb9be DT |
588 | struct joydev_client *client = file->private_data; |
589 | struct joydev *joydev = client->joydev; | |
024ac44c JF |
590 | void __user *argp = (void __user *)arg; |
591 | s32 tmp32; | |
592 | struct JS_DATA_SAVE_TYPE_32 ds32; | |
b126207c | 593 | int retval; |
024ac44c | 594 | |
b126207c DT |
595 | retval = mutex_lock_interruptible(&joydev->mutex); |
596 | if (retval) | |
597 | return retval; | |
598 | ||
599 | if (!joydev->exist) { | |
600 | retval = -ENODEV; | |
601 | goto out; | |
602 | } | |
603 | ||
604 | switch (cmd) { | |
1e0afb28 | 605 | |
024ac44c | 606 | case JS_SET_TIMELIMIT: |
b126207c DT |
607 | retval = get_user(tmp32, (s32 __user *) arg); |
608 | if (retval == 0) | |
024ac44c JF |
609 | joydev->glue.JS_TIMELIMIT = tmp32; |
610 | break; | |
b126207c | 611 | |
024ac44c JF |
612 | case JS_GET_TIMELIMIT: |
613 | tmp32 = joydev->glue.JS_TIMELIMIT; | |
b126207c | 614 | retval = put_user(tmp32, (s32 __user *) arg); |
024ac44c JF |
615 | break; |
616 | ||
617 | case JS_SET_ALL: | |
b126207c DT |
618 | retval = copy_from_user(&ds32, argp, |
619 | sizeof(ds32)) ? -EFAULT : 0; | |
620 | if (retval == 0) { | |
024ac44c JF |
621 | joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT; |
622 | joydev->glue.BUSY = ds32.BUSY; | |
623 | joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME; | |
624 | joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT; | |
625 | joydev->glue.JS_SAVE = ds32.JS_SAVE; | |
626 | joydev->glue.JS_CORR = ds32.JS_CORR; | |
627 | } | |
628 | break; | |
629 | ||
630 | case JS_GET_ALL: | |
631 | ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT; | |
632 | ds32.BUSY = joydev->glue.BUSY; | |
633 | ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME; | |
634 | ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT; | |
635 | ds32.JS_SAVE = joydev->glue.JS_SAVE; | |
636 | ds32.JS_CORR = joydev->glue.JS_CORR; | |
637 | ||
b126207c | 638 | retval = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0; |
024ac44c JF |
639 | break; |
640 | ||
641 | default: | |
b126207c DT |
642 | retval = joydev_ioctl_common(joydev, cmd, argp); |
643 | break; | |
024ac44c | 644 | } |
b126207c DT |
645 | |
646 | out: | |
647 | mutex_unlock(&joydev->mutex); | |
648 | return retval; | |
024ac44c JF |
649 | } |
650 | #endif /* CONFIG_COMPAT */ | |
651 | ||
b126207c DT |
652 | static long joydev_ioctl(struct file *file, |
653 | unsigned int cmd, unsigned long arg) | |
024ac44c | 654 | { |
d0ffb9be DT |
655 | struct joydev_client *client = file->private_data; |
656 | struct joydev *joydev = client->joydev; | |
024ac44c | 657 | void __user *argp = (void __user *)arg; |
b126207c | 658 | int retval; |
024ac44c | 659 | |
b126207c DT |
660 | retval = mutex_lock_interruptible(&joydev->mutex); |
661 | if (retval) | |
662 | return retval; | |
024ac44c | 663 | |
b126207c DT |
664 | if (!joydev->exist) { |
665 | retval = -ENODEV; | |
666 | goto out; | |
024ac44c | 667 | } |
b126207c DT |
668 | |
669 | switch (cmd) { | |
670 | ||
671 | case JS_SET_TIMELIMIT: | |
672 | retval = get_user(joydev->glue.JS_TIMELIMIT, | |
673 | (long __user *) arg); | |
674 | break; | |
675 | ||
676 | case JS_GET_TIMELIMIT: | |
677 | retval = put_user(joydev->glue.JS_TIMELIMIT, | |
678 | (long __user *) arg); | |
679 | break; | |
680 | ||
681 | case JS_SET_ALL: | |
682 | retval = copy_from_user(&joydev->glue, argp, | |
41091ad0 | 683 | sizeof(joydev->glue)) ? -EFAULT : 0; |
b126207c DT |
684 | break; |
685 | ||
686 | case JS_GET_ALL: | |
687 | retval = copy_to_user(argp, &joydev->glue, | |
688 | sizeof(joydev->glue)) ? -EFAULT : 0; | |
689 | break; | |
690 | ||
691 | default: | |
692 | retval = joydev_ioctl_common(joydev, cmd, argp); | |
693 | break; | |
694 | } | |
695 | out: | |
696 | mutex_unlock(&joydev->mutex); | |
697 | return retval; | |
024ac44c JF |
698 | } |
699 | ||
66e66118 | 700 | static const struct file_operations joydev_fops = { |
b126207c DT |
701 | .owner = THIS_MODULE, |
702 | .read = joydev_read, | |
703 | .poll = joydev_poll, | |
704 | .open = joydev_open, | |
705 | .release = joydev_release, | |
706 | .unlocked_ioctl = joydev_ioctl, | |
024ac44c | 707 | #ifdef CONFIG_COMPAT |
b126207c | 708 | .compat_ioctl = joydev_compat_ioctl, |
024ac44c | 709 | #endif |
b126207c | 710 | .fasync = joydev_fasync, |
6038f373 | 711 | .llseek = no_llseek, |
1da177e4 LT |
712 | }; |
713 | ||
b126207c | 714 | /* |
25985edc | 715 | * Mark device non-existent. This disables writes, ioctls and |
b126207c DT |
716 | * prevents new users from opening the device. Already posted |
717 | * blocking reads will stay, however new ones will fail. | |
718 | */ | |
719 | static void joydev_mark_dead(struct joydev *joydev) | |
720 | { | |
721 | mutex_lock(&joydev->mutex); | |
20da92de | 722 | joydev->exist = false; |
b126207c DT |
723 | mutex_unlock(&joydev->mutex); |
724 | } | |
725 | ||
726 | static void joydev_cleanup(struct joydev *joydev) | |
727 | { | |
728 | struct input_handle *handle = &joydev->handle; | |
729 | ||
730 | joydev_mark_dead(joydev); | |
731 | joydev_hangup(joydev); | |
7f8d4cad DT |
732 | |
733 | cdev_del(&joydev->cdev); | |
b126207c | 734 | |
25985edc | 735 | /* joydev is marked dead so no one else accesses joydev->open */ |
b126207c DT |
736 | if (joydev->open) |
737 | input_close_device(handle); | |
738 | } | |
739 | ||
15397f15 TH |
740 | static bool joydev_dev_is_absolute_mouse(struct input_dev *dev) |
741 | { | |
742 | DECLARE_BITMAP(jd_scratch, KEY_CNT); | |
743 | ||
744 | BUILD_BUG_ON(ABS_CNT > KEY_CNT || EV_CNT > KEY_CNT); | |
745 | ||
746 | /* | |
747 | * Virtualization (VMware, etc) and remote management (HP | |
748 | * ILO2) solutions use absolute coordinates for their virtual | |
749 | * pointing devices so that there is one-to-one relationship | |
750 | * between pointer position on the host screen and virtual | |
751 | * guest screen, and so their mice use ABS_X, ABS_Y and 3 | |
752 | * primary button events. This clashes with what joydev | |
753 | * considers to be joysticks (a device with at minimum ABS_X | |
754 | * axis). | |
755 | * | |
756 | * Here we are trying to separate absolute mice from | |
757 | * joysticks. A device is, for joystick detection purposes, | |
758 | * considered to be an absolute mouse if the following is | |
759 | * true: | |
760 | * | |
761 | * 1) Event types are exactly EV_ABS, EV_KEY and EV_SYN. | |
762 | * 2) Absolute events are exactly ABS_X and ABS_Y. | |
763 | * 3) Keys are exactly BTN_LEFT, BTN_RIGHT and BTN_MIDDLE. | |
764 | * 4) Device is not on "Amiga" bus. | |
765 | */ | |
766 | ||
767 | bitmap_zero(jd_scratch, EV_CNT); | |
768 | __set_bit(EV_ABS, jd_scratch); | |
769 | __set_bit(EV_KEY, jd_scratch); | |
770 | __set_bit(EV_SYN, jd_scratch); | |
771 | if (!bitmap_equal(jd_scratch, dev->evbit, EV_CNT)) | |
772 | return false; | |
773 | ||
774 | bitmap_zero(jd_scratch, ABS_CNT); | |
775 | __set_bit(ABS_X, jd_scratch); | |
776 | __set_bit(ABS_Y, jd_scratch); | |
777 | if (!bitmap_equal(dev->absbit, jd_scratch, ABS_CNT)) | |
778 | return false; | |
779 | ||
780 | bitmap_zero(jd_scratch, KEY_CNT); | |
781 | __set_bit(BTN_LEFT, jd_scratch); | |
782 | __set_bit(BTN_RIGHT, jd_scratch); | |
783 | __set_bit(BTN_MIDDLE, jd_scratch); | |
784 | ||
785 | if (!bitmap_equal(dev->keybit, jd_scratch, KEY_CNT)) | |
786 | return false; | |
787 | ||
788 | /* | |
789 | * Amiga joystick (amijoy) historically uses left/middle/right | |
790 | * button events. | |
791 | */ | |
792 | if (dev->id.bustype == BUS_AMIGA) | |
793 | return false; | |
794 | ||
795 | return true; | |
796 | } | |
0b7024ac DT |
797 | |
798 | static bool joydev_match(struct input_handler *handler, struct input_dev *dev) | |
799 | { | |
800 | /* Avoid touchpads and touchscreens */ | |
801 | if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_TOUCH, dev->keybit)) | |
802 | return false; | |
803 | ||
804 | /* Avoid tablets, digitisers and similar devices */ | |
805 | if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_DIGI, dev->keybit)) | |
806 | return false; | |
807 | ||
15397f15 TH |
808 | /* Avoid absolute mice */ |
809 | if (joydev_dev_is_absolute_mouse(dev)) | |
810 | return false; | |
811 | ||
0b7024ac DT |
812 | return true; |
813 | } | |
814 | ||
5b2a0826 DT |
815 | static int joydev_connect(struct input_handler *handler, struct input_dev *dev, |
816 | const struct input_device_id *id) | |
1da177e4 LT |
817 | { |
818 | struct joydev *joydev; | |
7f8d4cad | 819 | int i, j, t, minor, dev_no; |
5b2a0826 | 820 | int error; |
1da177e4 | 821 | |
7f8d4cad DT |
822 | minor = input_get_new_minor(JOYDEV_MINOR_BASE, JOYDEV_MINORS, true); |
823 | if (minor < 0) { | |
824 | error = minor; | |
825 | pr_err("failed to reserve new minor: %d\n", error); | |
826 | return error; | |
1da177e4 LT |
827 | } |
828 | ||
5b2a0826 | 829 | joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL); |
7f8d4cad DT |
830 | if (!joydev) { |
831 | error = -ENOMEM; | |
832 | goto err_free_minor; | |
833 | } | |
1da177e4 | 834 | |
d0ffb9be | 835 | INIT_LIST_HEAD(&joydev->client_list); |
b126207c DT |
836 | spin_lock_init(&joydev->client_lock); |
837 | mutex_init(&joydev->mutex); | |
1da177e4 | 838 | init_waitqueue_head(&joydev->wait); |
20da92de | 839 | joydev->exist = true; |
7f8d4cad DT |
840 | |
841 | dev_no = minor; | |
842 | /* Normalize device number if it falls into legacy range */ | |
843 | if (dev_no < JOYDEV_MINOR_BASE + JOYDEV_MINORS) | |
844 | dev_no -= JOYDEV_MINOR_BASE; | |
845 | dev_set_name(&joydev->dev, "js%d", dev_no); | |
b126207c | 846 | |
a7097ff8 | 847 | joydev->handle.dev = input_get_device(dev); |
3d5cb60e | 848 | joydev->handle.name = dev_name(&joydev->dev); |
1da177e4 LT |
849 | joydev->handle.handler = handler; |
850 | joydev->handle.private = joydev; | |
1da177e4 | 851 | |
f23487cd AG |
852 | for_each_set_bit(i, dev->absbit, ABS_CNT) { |
853 | joydev->absmap[i] = joydev->nabs; | |
854 | joydev->abspam[joydev->nabs] = i; | |
855 | joydev->nabs++; | |
856 | } | |
1da177e4 LT |
857 | |
858 | for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++) | |
859 | if (test_bit(i + BTN_MISC, dev->keybit)) { | |
860 | joydev->keymap[i] = joydev->nkey; | |
861 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
862 | joydev->nkey++; | |
863 | } | |
864 | ||
f24949e8 | 865 | for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++) |
1da177e4 LT |
866 | if (test_bit(i + BTN_MISC, dev->keybit)) { |
867 | joydev->keymap[i] = joydev->nkey; | |
868 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
869 | joydev->nkey++; | |
870 | } | |
871 | ||
872 | for (i = 0; i < joydev->nabs; i++) { | |
873 | j = joydev->abspam[i]; | |
987a6c02 | 874 | if (input_abs_get_max(dev, j) == input_abs_get_min(dev, j)) { |
1da177e4 | 875 | joydev->corr[i].type = JS_CORR_NONE; |
987a6c02 | 876 | joydev->abs[i] = input_abs_get_val(dev, j); |
1da177e4 LT |
877 | continue; |
878 | } | |
879 | joydev->corr[i].type = JS_CORR_BROKEN; | |
987a6c02 DM |
880 | joydev->corr[i].prec = input_abs_get_fuzz(dev, j); |
881 | ||
882 | t = (input_abs_get_max(dev, j) + input_abs_get_min(dev, j)) / 2; | |
883 | joydev->corr[i].coef[0] = t - input_abs_get_flat(dev, j); | |
884 | joydev->corr[i].coef[1] = t + input_abs_get_flat(dev, j); | |
b126207c | 885 | |
987a6c02 DM |
886 | t = (input_abs_get_max(dev, j) - input_abs_get_min(dev, j)) / 2 |
887 | - 2 * input_abs_get_flat(dev, j); | |
b126207c DT |
888 | if (t) { |
889 | joydev->corr[i].coef[2] = (1 << 29) / t; | |
890 | joydev->corr[i].coef[3] = (1 << 29) / t; | |
891 | ||
987a6c02 DM |
892 | joydev->abs[i] = |
893 | joydev_correct(input_abs_get_val(dev, j), | |
894 | joydev->corr + i); | |
b126207c | 895 | } |
1da177e4 LT |
896 | } |
897 | ||
7f8d4cad | 898 | joydev->dev.devt = MKDEV(INPUT_MAJOR, minor); |
9657d75c DT |
899 | joydev->dev.class = &input_class; |
900 | joydev->dev.parent = &dev->dev; | |
9657d75c DT |
901 | joydev->dev.release = joydev_free; |
902 | device_initialize(&joydev->dev); | |
5b2a0826 | 903 | |
b126207c | 904 | error = input_register_handle(&joydev->handle); |
5b2a0826 | 905 | if (error) |
9657d75c | 906 | goto err_free_joydev; |
5b2a0826 | 907 | |
7f8d4cad | 908 | cdev_init(&joydev->cdev, &joydev_fops); |
4a215aad | 909 | joydev->cdev.kobj.parent = &joydev->dev.kobj; |
7f8d4cad | 910 | error = cdev_add(&joydev->cdev, joydev->dev.devt, 1); |
5b2a0826 | 911 | if (error) |
b126207c DT |
912 | goto err_unregister_handle; |
913 | ||
914 | error = device_add(&joydev->dev); | |
915 | if (error) | |
916 | goto err_cleanup_joydev; | |
5b2a0826 DT |
917 | |
918 | return 0; | |
1da177e4 | 919 | |
b126207c DT |
920 | err_cleanup_joydev: |
921 | joydev_cleanup(joydev); | |
922 | err_unregister_handle: | |
923 | input_unregister_handle(&joydev->handle); | |
5b2a0826 | 924 | err_free_joydev: |
9657d75c | 925 | put_device(&joydev->dev); |
7f8d4cad DT |
926 | err_free_minor: |
927 | input_free_minor(minor); | |
5b2a0826 | 928 | return error; |
1da177e4 LT |
929 | } |
930 | ||
931 | static void joydev_disconnect(struct input_handle *handle) | |
932 | { | |
933 | struct joydev *joydev = handle->private; | |
1da177e4 | 934 | |
9657d75c | 935 | device_del(&joydev->dev); |
b126207c | 936 | joydev_cleanup(joydev); |
7f8d4cad | 937 | input_free_minor(MINOR(joydev->dev.devt)); |
b126207c | 938 | input_unregister_handle(handle); |
9657d75c | 939 | put_device(&joydev->dev); |
1da177e4 LT |
940 | } |
941 | ||
66e66118 | 942 | static const struct input_device_id joydev_ids[] = { |
1da177e4 | 943 | { |
b126207c DT |
944 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
945 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
946 | .evbit = { BIT_MASK(EV_ABS) }, |
947 | .absbit = { BIT_MASK(ABS_X) }, | |
1da177e4 LT |
948 | }, |
949 | { | |
b126207c DT |
950 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
951 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
952 | .evbit = { BIT_MASK(EV_ABS) }, |
953 | .absbit = { BIT_MASK(ABS_WHEEL) }, | |
1da177e4 LT |
954 | }, |
955 | { | |
b126207c DT |
956 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
957 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
958 | .evbit = { BIT_MASK(EV_ABS) }, |
959 | .absbit = { BIT_MASK(ABS_THROTTLE) }, | |
1da177e4 | 960 | }, |
26a6931b CF |
961 | { |
962 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
963 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
964 | .evbit = { BIT_MASK(EV_KEY) }, | |
965 | .keybit = {[BIT_WORD(BTN_JOYSTICK)] = BIT_MASK(BTN_JOYSTICK) }, | |
966 | }, | |
967 | { | |
968 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
969 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
970 | .evbit = { BIT_MASK(EV_KEY) }, | |
971 | .keybit = { [BIT_WORD(BTN_GAMEPAD)] = BIT_MASK(BTN_GAMEPAD) }, | |
972 | }, | |
973 | { | |
974 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
975 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
976 | .evbit = { BIT_MASK(EV_KEY) }, | |
977 | .keybit = { [BIT_WORD(BTN_TRIGGER_HAPPY)] = BIT_MASK(BTN_TRIGGER_HAPPY) }, | |
978 | }, | |
1e0afb28 | 979 | { } /* Terminating entry */ |
1da177e4 LT |
980 | }; |
981 | ||
982 | MODULE_DEVICE_TABLE(input, joydev_ids); | |
983 | ||
984 | static struct input_handler joydev_handler = { | |
b126207c | 985 | .event = joydev_event, |
0b7024ac | 986 | .match = joydev_match, |
b126207c DT |
987 | .connect = joydev_connect, |
988 | .disconnect = joydev_disconnect, | |
7f8d4cad | 989 | .legacy_minors = true, |
b126207c DT |
990 | .minor = JOYDEV_MINOR_BASE, |
991 | .name = "joydev", | |
992 | .id_table = joydev_ids, | |
1da177e4 LT |
993 | }; |
994 | ||
995 | static int __init joydev_init(void) | |
996 | { | |
4263cf0f | 997 | return input_register_handler(&joydev_handler); |
1da177e4 LT |
998 | } |
999 | ||
1000 | static void __exit joydev_exit(void) | |
1001 | { | |
1002 | input_unregister_handler(&joydev_handler); | |
1003 | } | |
1004 | ||
1005 | module_init(joydev_init); | |
1006 | module_exit(joydev_exit); |