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 JMC |
447 | abspam = memdup_user(argp, len); |
448 | if (IS_ERR(abspam)) { | |
449 | retval = PTR_ERR(abspam); | |
999b874f SK |
450 | goto out; |
451 | } | |
452 | ||
453 | for (i = 0; i < joydev->nabs; i++) { | |
454 | if (abspam[i] > ABS_MAX) { | |
455 | retval = -EINVAL; | |
456 | goto out; | |
457 | } | |
458 | } | |
459 | ||
460 | memcpy(joydev->abspam, abspam, len); | |
461 | ||
d2520a42 KW |
462 | for (i = 0; i < joydev->nabs; i++) |
463 | joydev->absmap[joydev->abspam[i]] = i; | |
464 | ||
999b874f SK |
465 | out: |
466 | kfree(abspam); | |
467 | return retval; | |
468 | } | |
469 | ||
470 | static int joydev_handle_JSIOCSBTNMAP(struct joydev *joydev, | |
471 | void __user *argp, size_t len) | |
472 | { | |
473 | __u16 *keypam; | |
474 | int i; | |
475 | int retval = 0; | |
476 | ||
477 | len = min(len, sizeof(joydev->keypam)); | |
478 | ||
479 | /* Validate the map. */ | |
5702222c JMC |
480 | keypam = memdup_user(argp, len); |
481 | if (IS_ERR(keypam)) { | |
482 | retval = PTR_ERR(keypam); | |
999b874f SK |
483 | goto out; |
484 | } | |
485 | ||
486 | for (i = 0; i < joydev->nkey; i++) { | |
487 | if (keypam[i] > KEY_MAX || keypam[i] < BTN_MISC) { | |
488 | retval = -EINVAL; | |
489 | goto out; | |
490 | } | |
491 | } | |
492 | ||
493 | memcpy(joydev->keypam, keypam, len); | |
494 | ||
495 | for (i = 0; i < joydev->nkey; i++) | |
496 | joydev->keymap[keypam[i] - BTN_MISC] = i; | |
497 | ||
498 | out: | |
499 | kfree(keypam); | |
500 | return retval; | |
501 | } | |
502 | ||
503 | ||
b126207c DT |
504 | static int joydev_ioctl_common(struct joydev *joydev, |
505 | unsigned int cmd, void __user *argp) | |
1da177e4 | 506 | { |
1da177e4 | 507 | struct input_dev *dev = joydev->handle.dev; |
ec8b4b70 | 508 | size_t len; |
987a6c02 | 509 | int i; |
ec8b4b70 | 510 | const char *name; |
1da177e4 | 511 | |
ec8b4b70 | 512 | /* Process fixed-sized commands. */ |
1da177e4 LT |
513 | switch (cmd) { |
514 | ||
b126207c DT |
515 | case JS_SET_CAL: |
516 | return copy_from_user(&joydev->glue.JS_CORR, argp, | |
024ac44c | 517 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 518 | |
b126207c DT |
519 | case JS_GET_CAL: |
520 | return copy_to_user(argp, &joydev->glue.JS_CORR, | |
024ac44c | 521 | sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0; |
1e0afb28 | 522 | |
b126207c DT |
523 | case JS_SET_TIMEOUT: |
524 | return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1e0afb28 | 525 | |
b126207c DT |
526 | case JS_GET_TIMEOUT: |
527 | return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp); | |
1da177e4 | 528 | |
b126207c DT |
529 | case JSIOCGVERSION: |
530 | return put_user(JS_VERSION, (__u32 __user *) argp); | |
1e0afb28 | 531 | |
b126207c DT |
532 | case JSIOCGAXES: |
533 | return put_user(joydev->nabs, (__u8 __user *) argp); | |
1e0afb28 | 534 | |
b126207c DT |
535 | case JSIOCGBUTTONS: |
536 | return put_user(joydev->nkey, (__u8 __user *) argp); | |
1e0afb28 | 537 | |
b126207c DT |
538 | case JSIOCSCORR: |
539 | if (copy_from_user(joydev->corr, argp, | |
540 | sizeof(joydev->corr[0]) * joydev->nabs)) | |
987a6c02 | 541 | return -EFAULT; |
1e0afb28 | 542 | |
b126207c | 543 | for (i = 0; i < joydev->nabs; i++) { |
987a6c02 DM |
544 | int val = input_abs_get_val(dev, joydev->abspam[i]); |
545 | joydev->abs[i] = joydev_correct(val, &joydev->corr[i]); | |
b126207c DT |
546 | } |
547 | return 0; | |
1e0afb28 | 548 | |
b126207c DT |
549 | case JSIOCGCORR: |
550 | return copy_to_user(argp, joydev->corr, | |
551 | sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0; | |
552 | ||
ec8b4b70 SK |
553 | } |
554 | ||
555 | /* | |
556 | * Process variable-sized commands (the axis and button map commands | |
557 | * are considered variable-sized to decouple them from the values of | |
558 | * ABS_MAX and KEY_MAX). | |
559 | */ | |
560 | switch (cmd & ~IOCSIZE_MASK) { | |
561 | ||
562 | case (JSIOCSAXMAP & ~IOCSIZE_MASK): | |
999b874f | 563 | return joydev_handle_JSIOCSAXMAP(joydev, argp, _IOC_SIZE(cmd)); |
b126207c | 564 | |
ec8b4b70 SK |
565 | case (JSIOCGAXMAP & ~IOCSIZE_MASK): |
566 | len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->abspam)); | |
999b874f | 567 | return copy_to_user(argp, joydev->abspam, len) ? -EFAULT : len; |
ec8b4b70 SK |
568 | |
569 | case (JSIOCSBTNMAP & ~IOCSIZE_MASK): | |
999b874f | 570 | return joydev_handle_JSIOCSBTNMAP(joydev, argp, _IOC_SIZE(cmd)); |
b126207c | 571 | |
ec8b4b70 SK |
572 | case (JSIOCGBTNMAP & ~IOCSIZE_MASK): |
573 | len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->keypam)); | |
999b874f | 574 | return copy_to_user(argp, joydev->keypam, len) ? -EFAULT : len; |
b126207c | 575 | |
ec8b4b70 SK |
576 | case JSIOCGNAME(0): |
577 | name = dev->name; | |
578 | if (!name) | |
579 | return 0; | |
580 | ||
581 | len = min_t(size_t, _IOC_SIZE(cmd), strlen(name) + 1); | |
582 | return copy_to_user(argp, name, len) ? -EFAULT : len; | |
1da177e4 | 583 | } |
ec8b4b70 | 584 | |
1da177e4 LT |
585 | return -EINVAL; |
586 | } | |
587 | ||
024ac44c | 588 | #ifdef CONFIG_COMPAT |
b126207c DT |
589 | static long joydev_compat_ioctl(struct file *file, |
590 | unsigned int cmd, unsigned long arg) | |
024ac44c | 591 | { |
d0ffb9be DT |
592 | struct joydev_client *client = file->private_data; |
593 | struct joydev *joydev = client->joydev; | |
024ac44c JF |
594 | void __user *argp = (void __user *)arg; |
595 | s32 tmp32; | |
596 | struct JS_DATA_SAVE_TYPE_32 ds32; | |
b126207c | 597 | int retval; |
024ac44c | 598 | |
b126207c DT |
599 | retval = mutex_lock_interruptible(&joydev->mutex); |
600 | if (retval) | |
601 | return retval; | |
602 | ||
603 | if (!joydev->exist) { | |
604 | retval = -ENODEV; | |
605 | goto out; | |
606 | } | |
607 | ||
608 | switch (cmd) { | |
1e0afb28 | 609 | |
024ac44c | 610 | case JS_SET_TIMELIMIT: |
b126207c DT |
611 | retval = get_user(tmp32, (s32 __user *) arg); |
612 | if (retval == 0) | |
024ac44c JF |
613 | joydev->glue.JS_TIMELIMIT = tmp32; |
614 | break; | |
b126207c | 615 | |
024ac44c JF |
616 | case JS_GET_TIMELIMIT: |
617 | tmp32 = joydev->glue.JS_TIMELIMIT; | |
b126207c | 618 | retval = put_user(tmp32, (s32 __user *) arg); |
024ac44c JF |
619 | break; |
620 | ||
621 | case JS_SET_ALL: | |
b126207c DT |
622 | retval = copy_from_user(&ds32, argp, |
623 | sizeof(ds32)) ? -EFAULT : 0; | |
624 | if (retval == 0) { | |
024ac44c JF |
625 | joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT; |
626 | joydev->glue.BUSY = ds32.BUSY; | |
627 | joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME; | |
628 | joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT; | |
629 | joydev->glue.JS_SAVE = ds32.JS_SAVE; | |
630 | joydev->glue.JS_CORR = ds32.JS_CORR; | |
631 | } | |
632 | break; | |
633 | ||
634 | case JS_GET_ALL: | |
635 | ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT; | |
636 | ds32.BUSY = joydev->glue.BUSY; | |
637 | ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME; | |
638 | ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT; | |
639 | ds32.JS_SAVE = joydev->glue.JS_SAVE; | |
640 | ds32.JS_CORR = joydev->glue.JS_CORR; | |
641 | ||
b126207c | 642 | retval = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0; |
024ac44c JF |
643 | break; |
644 | ||
645 | default: | |
b126207c DT |
646 | retval = joydev_ioctl_common(joydev, cmd, argp); |
647 | break; | |
024ac44c | 648 | } |
b126207c DT |
649 | |
650 | out: | |
651 | mutex_unlock(&joydev->mutex); | |
652 | return retval; | |
024ac44c JF |
653 | } |
654 | #endif /* CONFIG_COMPAT */ | |
655 | ||
b126207c DT |
656 | static long joydev_ioctl(struct file *file, |
657 | unsigned int cmd, unsigned long arg) | |
024ac44c | 658 | { |
d0ffb9be DT |
659 | struct joydev_client *client = file->private_data; |
660 | struct joydev *joydev = client->joydev; | |
024ac44c | 661 | void __user *argp = (void __user *)arg; |
b126207c | 662 | int retval; |
024ac44c | 663 | |
b126207c DT |
664 | retval = mutex_lock_interruptible(&joydev->mutex); |
665 | if (retval) | |
666 | return retval; | |
024ac44c | 667 | |
b126207c DT |
668 | if (!joydev->exist) { |
669 | retval = -ENODEV; | |
670 | goto out; | |
024ac44c | 671 | } |
b126207c DT |
672 | |
673 | switch (cmd) { | |
674 | ||
675 | case JS_SET_TIMELIMIT: | |
676 | retval = get_user(joydev->glue.JS_TIMELIMIT, | |
677 | (long __user *) arg); | |
678 | break; | |
679 | ||
680 | case JS_GET_TIMELIMIT: | |
681 | retval = put_user(joydev->glue.JS_TIMELIMIT, | |
682 | (long __user *) arg); | |
683 | break; | |
684 | ||
685 | case JS_SET_ALL: | |
686 | retval = copy_from_user(&joydev->glue, argp, | |
41091ad0 | 687 | sizeof(joydev->glue)) ? -EFAULT : 0; |
b126207c DT |
688 | break; |
689 | ||
690 | case JS_GET_ALL: | |
691 | retval = copy_to_user(argp, &joydev->glue, | |
692 | sizeof(joydev->glue)) ? -EFAULT : 0; | |
693 | break; | |
694 | ||
695 | default: | |
696 | retval = joydev_ioctl_common(joydev, cmd, argp); | |
697 | break; | |
698 | } | |
699 | out: | |
700 | mutex_unlock(&joydev->mutex); | |
701 | return retval; | |
024ac44c JF |
702 | } |
703 | ||
66e66118 | 704 | static const struct file_operations joydev_fops = { |
b126207c DT |
705 | .owner = THIS_MODULE, |
706 | .read = joydev_read, | |
707 | .poll = joydev_poll, | |
708 | .open = joydev_open, | |
709 | .release = joydev_release, | |
710 | .unlocked_ioctl = joydev_ioctl, | |
024ac44c | 711 | #ifdef CONFIG_COMPAT |
b126207c | 712 | .compat_ioctl = joydev_compat_ioctl, |
024ac44c | 713 | #endif |
b126207c | 714 | .fasync = joydev_fasync, |
6038f373 | 715 | .llseek = no_llseek, |
1da177e4 LT |
716 | }; |
717 | ||
b126207c | 718 | /* |
25985edc | 719 | * Mark device non-existent. This disables writes, ioctls and |
b126207c DT |
720 | * prevents new users from opening the device. Already posted |
721 | * blocking reads will stay, however new ones will fail. | |
722 | */ | |
723 | static void joydev_mark_dead(struct joydev *joydev) | |
724 | { | |
725 | mutex_lock(&joydev->mutex); | |
20da92de | 726 | joydev->exist = false; |
b126207c DT |
727 | mutex_unlock(&joydev->mutex); |
728 | } | |
729 | ||
730 | static void joydev_cleanup(struct joydev *joydev) | |
731 | { | |
732 | struct input_handle *handle = &joydev->handle; | |
733 | ||
734 | joydev_mark_dead(joydev); | |
735 | joydev_hangup(joydev); | |
7f8d4cad DT |
736 | |
737 | cdev_del(&joydev->cdev); | |
b126207c | 738 | |
25985edc | 739 | /* joydev is marked dead so no one else accesses joydev->open */ |
b126207c DT |
740 | if (joydev->open) |
741 | input_close_device(handle); | |
742 | } | |
743 | ||
15397f15 TH |
744 | static bool joydev_dev_is_absolute_mouse(struct input_dev *dev) |
745 | { | |
746 | DECLARE_BITMAP(jd_scratch, KEY_CNT); | |
747 | ||
748 | BUILD_BUG_ON(ABS_CNT > KEY_CNT || EV_CNT > KEY_CNT); | |
749 | ||
750 | /* | |
751 | * Virtualization (VMware, etc) and remote management (HP | |
752 | * ILO2) solutions use absolute coordinates for their virtual | |
753 | * pointing devices so that there is one-to-one relationship | |
754 | * between pointer position on the host screen and virtual | |
755 | * guest screen, and so their mice use ABS_X, ABS_Y and 3 | |
756 | * primary button events. This clashes with what joydev | |
757 | * considers to be joysticks (a device with at minimum ABS_X | |
758 | * axis). | |
759 | * | |
760 | * Here we are trying to separate absolute mice from | |
761 | * joysticks. A device is, for joystick detection purposes, | |
762 | * considered to be an absolute mouse if the following is | |
763 | * true: | |
764 | * | |
765 | * 1) Event types are exactly EV_ABS, EV_KEY and EV_SYN. | |
766 | * 2) Absolute events are exactly ABS_X and ABS_Y. | |
767 | * 3) Keys are exactly BTN_LEFT, BTN_RIGHT and BTN_MIDDLE. | |
768 | * 4) Device is not on "Amiga" bus. | |
769 | */ | |
770 | ||
771 | bitmap_zero(jd_scratch, EV_CNT); | |
772 | __set_bit(EV_ABS, jd_scratch); | |
773 | __set_bit(EV_KEY, jd_scratch); | |
774 | __set_bit(EV_SYN, jd_scratch); | |
775 | if (!bitmap_equal(jd_scratch, dev->evbit, EV_CNT)) | |
776 | return false; | |
777 | ||
778 | bitmap_zero(jd_scratch, ABS_CNT); | |
779 | __set_bit(ABS_X, jd_scratch); | |
780 | __set_bit(ABS_Y, jd_scratch); | |
781 | if (!bitmap_equal(dev->absbit, jd_scratch, ABS_CNT)) | |
782 | return false; | |
783 | ||
784 | bitmap_zero(jd_scratch, KEY_CNT); | |
785 | __set_bit(BTN_LEFT, jd_scratch); | |
786 | __set_bit(BTN_RIGHT, jd_scratch); | |
787 | __set_bit(BTN_MIDDLE, jd_scratch); | |
788 | ||
789 | if (!bitmap_equal(dev->keybit, jd_scratch, KEY_CNT)) | |
790 | return false; | |
791 | ||
792 | /* | |
793 | * Amiga joystick (amijoy) historically uses left/middle/right | |
794 | * button events. | |
795 | */ | |
796 | if (dev->id.bustype == BUS_AMIGA) | |
797 | return false; | |
798 | ||
799 | return true; | |
800 | } | |
0b7024ac DT |
801 | |
802 | static bool joydev_match(struct input_handler *handler, struct input_dev *dev) | |
803 | { | |
804 | /* Avoid touchpads and touchscreens */ | |
805 | if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_TOUCH, dev->keybit)) | |
806 | return false; | |
807 | ||
808 | /* Avoid tablets, digitisers and similar devices */ | |
809 | if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_DIGI, dev->keybit)) | |
810 | return false; | |
811 | ||
15397f15 TH |
812 | /* Avoid absolute mice */ |
813 | if (joydev_dev_is_absolute_mouse(dev)) | |
814 | return false; | |
815 | ||
0b7024ac DT |
816 | return true; |
817 | } | |
818 | ||
5b2a0826 DT |
819 | static int joydev_connect(struct input_handler *handler, struct input_dev *dev, |
820 | const struct input_device_id *id) | |
1da177e4 LT |
821 | { |
822 | struct joydev *joydev; | |
7f8d4cad | 823 | int i, j, t, minor, dev_no; |
5b2a0826 | 824 | int error; |
1da177e4 | 825 | |
7f8d4cad DT |
826 | minor = input_get_new_minor(JOYDEV_MINOR_BASE, JOYDEV_MINORS, true); |
827 | if (minor < 0) { | |
828 | error = minor; | |
829 | pr_err("failed to reserve new minor: %d\n", error); | |
830 | return error; | |
1da177e4 LT |
831 | } |
832 | ||
5b2a0826 | 833 | joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL); |
7f8d4cad DT |
834 | if (!joydev) { |
835 | error = -ENOMEM; | |
836 | goto err_free_minor; | |
837 | } | |
1da177e4 | 838 | |
d0ffb9be | 839 | INIT_LIST_HEAD(&joydev->client_list); |
b126207c DT |
840 | spin_lock_init(&joydev->client_lock); |
841 | mutex_init(&joydev->mutex); | |
1da177e4 | 842 | init_waitqueue_head(&joydev->wait); |
20da92de | 843 | joydev->exist = true; |
7f8d4cad DT |
844 | |
845 | dev_no = minor; | |
846 | /* Normalize device number if it falls into legacy range */ | |
847 | if (dev_no < JOYDEV_MINOR_BASE + JOYDEV_MINORS) | |
848 | dev_no -= JOYDEV_MINOR_BASE; | |
849 | dev_set_name(&joydev->dev, "js%d", dev_no); | |
b126207c | 850 | |
a7097ff8 | 851 | joydev->handle.dev = input_get_device(dev); |
3d5cb60e | 852 | joydev->handle.name = dev_name(&joydev->dev); |
1da177e4 LT |
853 | joydev->handle.handler = handler; |
854 | joydev->handle.private = joydev; | |
1da177e4 | 855 | |
f23487cd AG |
856 | for_each_set_bit(i, dev->absbit, ABS_CNT) { |
857 | joydev->absmap[i] = joydev->nabs; | |
858 | joydev->abspam[joydev->nabs] = i; | |
859 | joydev->nabs++; | |
860 | } | |
1da177e4 LT |
861 | |
862 | for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++) | |
863 | if (test_bit(i + BTN_MISC, dev->keybit)) { | |
864 | joydev->keymap[i] = joydev->nkey; | |
865 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
866 | joydev->nkey++; | |
867 | } | |
868 | ||
f24949e8 | 869 | for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++) |
1da177e4 LT |
870 | if (test_bit(i + BTN_MISC, dev->keybit)) { |
871 | joydev->keymap[i] = joydev->nkey; | |
872 | joydev->keypam[joydev->nkey] = i + BTN_MISC; | |
873 | joydev->nkey++; | |
874 | } | |
875 | ||
876 | for (i = 0; i < joydev->nabs; i++) { | |
877 | j = joydev->abspam[i]; | |
987a6c02 | 878 | if (input_abs_get_max(dev, j) == input_abs_get_min(dev, j)) { |
1da177e4 | 879 | joydev->corr[i].type = JS_CORR_NONE; |
987a6c02 | 880 | joydev->abs[i] = input_abs_get_val(dev, j); |
1da177e4 LT |
881 | continue; |
882 | } | |
883 | joydev->corr[i].type = JS_CORR_BROKEN; | |
987a6c02 DM |
884 | joydev->corr[i].prec = input_abs_get_fuzz(dev, j); |
885 | ||
886 | t = (input_abs_get_max(dev, j) + input_abs_get_min(dev, j)) / 2; | |
887 | joydev->corr[i].coef[0] = t - input_abs_get_flat(dev, j); | |
888 | joydev->corr[i].coef[1] = t + input_abs_get_flat(dev, j); | |
b126207c | 889 | |
987a6c02 DM |
890 | t = (input_abs_get_max(dev, j) - input_abs_get_min(dev, j)) / 2 |
891 | - 2 * input_abs_get_flat(dev, j); | |
b126207c DT |
892 | if (t) { |
893 | joydev->corr[i].coef[2] = (1 << 29) / t; | |
894 | joydev->corr[i].coef[3] = (1 << 29) / t; | |
895 | ||
987a6c02 DM |
896 | joydev->abs[i] = |
897 | joydev_correct(input_abs_get_val(dev, j), | |
898 | joydev->corr + i); | |
b126207c | 899 | } |
1da177e4 LT |
900 | } |
901 | ||
7f8d4cad | 902 | joydev->dev.devt = MKDEV(INPUT_MAJOR, minor); |
9657d75c DT |
903 | joydev->dev.class = &input_class; |
904 | joydev->dev.parent = &dev->dev; | |
9657d75c DT |
905 | joydev->dev.release = joydev_free; |
906 | device_initialize(&joydev->dev); | |
5b2a0826 | 907 | |
b126207c | 908 | error = input_register_handle(&joydev->handle); |
5b2a0826 | 909 | if (error) |
9657d75c | 910 | goto err_free_joydev; |
5b2a0826 | 911 | |
7f8d4cad | 912 | cdev_init(&joydev->cdev, &joydev_fops); |
4a215aad | 913 | joydev->cdev.kobj.parent = &joydev->dev.kobj; |
7f8d4cad | 914 | error = cdev_add(&joydev->cdev, joydev->dev.devt, 1); |
5b2a0826 | 915 | if (error) |
b126207c DT |
916 | goto err_unregister_handle; |
917 | ||
918 | error = device_add(&joydev->dev); | |
919 | if (error) | |
920 | goto err_cleanup_joydev; | |
5b2a0826 DT |
921 | |
922 | return 0; | |
1da177e4 | 923 | |
b126207c DT |
924 | err_cleanup_joydev: |
925 | joydev_cleanup(joydev); | |
926 | err_unregister_handle: | |
927 | input_unregister_handle(&joydev->handle); | |
5b2a0826 | 928 | err_free_joydev: |
9657d75c | 929 | put_device(&joydev->dev); |
7f8d4cad DT |
930 | err_free_minor: |
931 | input_free_minor(minor); | |
5b2a0826 | 932 | return error; |
1da177e4 LT |
933 | } |
934 | ||
935 | static void joydev_disconnect(struct input_handle *handle) | |
936 | { | |
937 | struct joydev *joydev = handle->private; | |
1da177e4 | 938 | |
9657d75c | 939 | device_del(&joydev->dev); |
b126207c | 940 | joydev_cleanup(joydev); |
7f8d4cad | 941 | input_free_minor(MINOR(joydev->dev.devt)); |
b126207c | 942 | input_unregister_handle(handle); |
9657d75c | 943 | put_device(&joydev->dev); |
1da177e4 LT |
944 | } |
945 | ||
66e66118 | 946 | static const struct input_device_id joydev_ids[] = { |
1da177e4 | 947 | { |
b126207c DT |
948 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
949 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
950 | .evbit = { BIT_MASK(EV_ABS) }, |
951 | .absbit = { BIT_MASK(ABS_X) }, | |
1da177e4 LT |
952 | }, |
953 | { | |
b126207c DT |
954 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
955 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
956 | .evbit = { BIT_MASK(EV_ABS) }, |
957 | .absbit = { BIT_MASK(ABS_WHEEL) }, | |
1da177e4 LT |
958 | }, |
959 | { | |
b126207c DT |
960 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
961 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
962 | .evbit = { BIT_MASK(EV_ABS) }, |
963 | .absbit = { BIT_MASK(ABS_THROTTLE) }, | |
1da177e4 | 964 | }, |
26a6931b CF |
965 | { |
966 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
967 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
968 | .evbit = { BIT_MASK(EV_KEY) }, | |
969 | .keybit = {[BIT_WORD(BTN_JOYSTICK)] = BIT_MASK(BTN_JOYSTICK) }, | |
970 | }, | |
971 | { | |
972 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
973 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
974 | .evbit = { BIT_MASK(EV_KEY) }, | |
975 | .keybit = { [BIT_WORD(BTN_GAMEPAD)] = BIT_MASK(BTN_GAMEPAD) }, | |
976 | }, | |
977 | { | |
978 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
979 | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
980 | .evbit = { BIT_MASK(EV_KEY) }, | |
981 | .keybit = { [BIT_WORD(BTN_TRIGGER_HAPPY)] = BIT_MASK(BTN_TRIGGER_HAPPY) }, | |
982 | }, | |
1e0afb28 | 983 | { } /* Terminating entry */ |
1da177e4 LT |
984 | }; |
985 | ||
986 | MODULE_DEVICE_TABLE(input, joydev_ids); | |
987 | ||
988 | static struct input_handler joydev_handler = { | |
b126207c | 989 | .event = joydev_event, |
0b7024ac | 990 | .match = joydev_match, |
b126207c DT |
991 | .connect = joydev_connect, |
992 | .disconnect = joydev_disconnect, | |
7f8d4cad | 993 | .legacy_minors = true, |
b126207c DT |
994 | .minor = JOYDEV_MINOR_BASE, |
995 | .name = "joydev", | |
996 | .id_table = joydev_ids, | |
1da177e4 LT |
997 | }; |
998 | ||
999 | static int __init joydev_init(void) | |
1000 | { | |
4263cf0f | 1001 | return input_register_handler(&joydev_handler); |
1da177e4 LT |
1002 | } |
1003 | ||
1004 | static void __exit joydev_exit(void) | |
1005 | { | |
1006 | input_unregister_handler(&joydev_handler); | |
1007 | } | |
1008 | ||
1009 | module_init(joydev_init); | |
1010 | module_exit(joydev_exit); |