blob: 5d11fea3c8eccd10dbd892d4898d4b0ecca3aacd [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Joe Perchesda0c4902010-11-29 23:33:07 -080013#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <asm/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#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>
Alexey Dobriyana99bbaf2009-10-04 16:11:37 +040022#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <linux/device.h>
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -070030#include <linux/cdev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
32MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
33MODULE_DESCRIPTION("Joystick device interfaces");
34MODULE_SUPPORTED_DEVICE("input/js");
35MODULE_LICENSE("GPL");
36
37#define JOYDEV_MINOR_BASE 0
38#define JOYDEV_MINORS 16
39#define JOYDEV_BUFFER_SIZE 64
40
Linus Torvalds1da177e2005-04-16 15:20:36 -070041struct joydev {
Linus Torvalds1da177e2005-04-16 15:20:36 -070042 int open;
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 struct input_handle handle;
44 wait_queue_head_t wait;
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -040045 struct list_head client_list;
Dmitry Torokhovb1262072007-08-30 00:22:32 -040046 spinlock_t client_lock; /* protects client_list */
47 struct mutex mutex;
Dmitry Torokhov9657d752007-06-14 23:32:24 -040048 struct device dev;
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -070049 struct cdev cdev;
Dmitry Torokhov20da92d2010-07-15 23:27:36 -070050 bool exist;
Dmitry Torokhov9657d752007-06-14 23:32:24 -040051
Daniel Mack81c2a3b2010-05-20 22:52:58 -070052 struct js_corr corr[ABS_CNT];
Linus Torvalds1da177e2005-04-16 15:20:36 -070053 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];
Daniel Mack81c2a3b2010-05-20 22:52:58 -070058 __u8 absmap[ABS_CNT];
59 __u8 abspam[ABS_CNT];
60 __s16 abs[ABS_CNT];
Linus Torvalds1da177e2005-04-16 15:20:36 -070061};
62
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -040063struct joydev_client {
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 struct js_event buffer[JOYDEV_BUFFER_SIZE];
65 int head;
66 int tail;
67 int startup;
Dmitry Torokhovb1262072007-08-30 00:22:32 -040068 spinlock_t buffer_lock; /* protects access to buffer, head and tail */
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 struct fasync_struct *fasync;
70 struct joydev *joydev;
71 struct list_head node;
72};
73
Linus Torvalds1da177e2005-04-16 15:20:36 -070074static int joydev_correct(int value, struct js_corr *corr)
75{
76 switch (corr->type) {
Dmitry Torokhovb1262072007-08-30 00:22:32 -040077
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;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 }
90
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -040091 return value < -32767 ? -32767 : (value > 32767 ? 32767 : value);
Linus Torvalds1da177e2005-04-16 15:20:36 -070092}
93
Dmitry Torokhovb1262072007-08-30 00:22:32 -040094static 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
118static void joydev_event(struct input_handle *handle,
119 unsigned int type, unsigned int code, int value)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120{
121 struct joydev *joydev = handle->private;
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400122 struct joydev_client *client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 struct js_event event;
124
125 switch (type) {
126
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400127 case EV_KEY:
128 if (code < BTN_MISC || value == 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 return;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400130 event.type = JS_EVENT_BUTTON;
131 event.number = joydev->keymap[code - BTN_MISC];
132 event.value = value;
133 break;
134
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])
141 return;
142 joydev->abs[event.number] = event.value;
143 break;
144
145 default:
146 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 }
148
Tobias Klauser6f5eacf2005-07-11 01:08:56 -0500149 event.time = jiffies_to_msecs(jiffies);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
Dmitry Torokhov82ba56c2007-10-13 15:46:55 -0400151 rcu_read_lock();
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400152 list_for_each_entry_rcu(client, &joydev->client_list, node)
153 joydev_pass_event(client, &event);
Dmitry Torokhov82ba56c2007-10-13 15:46:55 -0400154 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
156 wake_up_interruptible(&joydev->wait);
157}
158
159static int joydev_fasync(int fd, struct file *file, int on)
160{
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400161 struct joydev_client *client = file->private_data;
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400162
Jonathan Corbet60aa4922009-02-01 14:52:56 -0700163 return fasync_helper(fd, file, on, &client->fasync);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164}
165
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400166static void joydev_free(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167{
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400168 struct joydev *joydev = container_of(dev, struct joydev, dev);
169
Dmitry Torokhova7097ff2008-04-01 00:22:53 -0400170 input_put_device(joydev->handle.dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 kfree(joydev);
172}
173
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400174static 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);
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400180}
181
182static 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);
Dmitry Torokhov82ba56c2007-10-13 15:46:55 -0400188 synchronize_rcu();
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400189}
190
191static 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;
Oliver Neukum06445012007-10-12 14:18:40 -0400201 else if (!joydev->open++) {
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400202 retval = input_open_device(&joydev->handle);
Oliver Neukum06445012007-10-12 14:18:40 -0400203 if (retval)
204 joydev->open--;
205 }
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400206
207 mutex_unlock(&joydev->mutex);
208 return retval;
209}
210
211static 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 */
225static 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
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400237static int joydev_release(struct inode *inode, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238{
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400239 struct joydev_client *client = file->private_data;
240 struct joydev *joydev = client->joydev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400242 joydev_detach_client(joydev, client);
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400243 kfree(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400245 joydev_close_device(joydev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 return 0;
248}
249
250static int joydev_open(struct inode *inode, struct file *file)
251{
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700252 struct joydev *joydev =
253 container_of(inode->i_cdev, struct joydev, cdev);
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400254 struct joydev_client *client;
Dmitry Torokhovd542ed82007-04-12 01:30:15 -0400255 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400257 client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL);
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700258 if (!client)
259 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400261 spin_lock_init(&client->buffer_lock);
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400262 client->joydev = joydev;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400263 joydev_attach_client(joydev, client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400265 error = joydev_open_device(joydev);
266 if (error)
267 goto err_free_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400269 file->private_data = client;
Dmitry Torokhov3d7bbd42010-02-04 00:30:42 -0800270 nonseekable_open(inode, file);
271
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 return 0;
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400273
274 err_free_client:
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400275 joydev_detach_client(joydev, client);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400276 kfree(client);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400277 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278}
279
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400280static int joydev_generate_startup_event(struct joydev_client *client,
281 struct input_dev *input,
282 struct js_event *event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283{
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400284 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310}
311
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400312static 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 */
333static 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);
366}
367
368static 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
376static ssize_t joydev_read(struct file *file, char __user *buf,
377 size_t count, loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378{
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400379 struct joydev_client *client = file->private_data;
380 struct joydev *joydev = client->joydev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 struct input_dev *input = joydev->handle.dev;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400382 struct js_event event;
383 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400385 if (!joydev->exist)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 return -ENODEV;
387
388 if (count < sizeof(struct js_event))
389 return -EINVAL;
390
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400391 if (count == sizeof(struct JS_DATA_TYPE))
392 return joydev_0x_read(client, input, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400394 if (!joydev_data_pending(client) && (file->f_flags & O_NONBLOCK))
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400395 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400397 retval = wait_event_interruptible(joydev->wait,
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400398 !joydev->exist || joydev_data_pending(client));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 if (retval)
400 return retval;
401
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400402 if (!joydev->exist)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 return -ENODEV;
404
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400405 while (retval + sizeof(struct js_event) <= count &&
406 joydev_generate_startup_event(client, input, &event)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407
408 if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
409 return -EFAULT;
410
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 retval += sizeof(struct js_event);
412 }
413
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400414 while (retval + sizeof(struct js_event) <= count &&
415 joydev_fetch_next_event(client, &event)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400417 if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 return -EFAULT;
419
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 retval += sizeof(struct js_event);
421 }
422
423 return retval;
424}
425
426/* No kernel lock - fine */
427static unsigned int joydev_poll(struct file *file, poll_table *wait)
428{
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400429 struct joydev_client *client = file->private_data;
430 struct joydev *joydev = client->joydev;
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400431
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400432 poll_wait(file, &joydev->wait, wait);
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400433 return (joydev_data_pending(client) ? (POLLIN | POLLRDNORM) : 0) |
434 (joydev->exist ? 0 : (POLLHUP | POLLERR));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435}
436
Stephen Kitt999b8742009-08-25 19:24:22 -0700437static 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. */
Javier Martinez Canillas57022222015-10-02 11:12:53 -0700447 abspam = memdup_user(argp, len);
Javier Martinez Canillas5b21e3c2015-10-06 15:23:36 -0700448 if (IS_ERR(abspam))
449 return PTR_ERR(abspam);
Stephen Kitt999b8742009-08-25 19:24:22 -0700450
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
Kenneth Watersd2520a42010-09-21 00:58:23 -0700460 for (i = 0; i < joydev->nabs; i++)
461 joydev->absmap[joydev->abspam[i]] = i;
462
Stephen Kitt999b8742009-08-25 19:24:22 -0700463 out:
464 kfree(abspam);
465 return retval;
466}
467
468static 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. */
Javier Martinez Canillas57022222015-10-02 11:12:53 -0700478 keypam = memdup_user(argp, len);
Javier Martinez Canillas5b21e3c2015-10-06 15:23:36 -0700479 if (IS_ERR(keypam))
480 return PTR_ERR(keypam);
Stephen Kitt999b8742009-08-25 19:24:22 -0700481
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
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400500static int joydev_ioctl_common(struct joydev *joydev,
501 unsigned int cmd, void __user *argp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 struct input_dev *dev = joydev->handle.dev;
Stephen Kittec8b4b72009-08-12 01:12:08 -0700504 size_t len;
Daniel Mack987a6c02010-08-02 20:15:17 -0700505 int i;
Stephen Kittec8b4b72009-08-12 01:12:08 -0700506 const char *name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507
Stephen Kittec8b4b72009-08-12 01:12:08 -0700508 /* Process fixed-sized commands. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 switch (cmd) {
510
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400511 case JS_SET_CAL:
512 return copy_from_user(&joydev->glue.JS_CORR, argp,
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500513 sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400514
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400515 case JS_GET_CAL:
516 return copy_to_user(argp, &joydev->glue.JS_CORR,
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500517 sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400518
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400519 case JS_SET_TIMEOUT:
520 return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400521
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400522 case JS_GET_TIMEOUT:
523 return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400525 case JSIOCGVERSION:
526 return put_user(JS_VERSION, (__u32 __user *) argp);
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400527
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400528 case JSIOCGAXES:
529 return put_user(joydev->nabs, (__u8 __user *) argp);
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400530
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400531 case JSIOCGBUTTONS:
532 return put_user(joydev->nkey, (__u8 __user *) argp);
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400533
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400534 case JSIOCSCORR:
535 if (copy_from_user(joydev->corr, argp,
536 sizeof(joydev->corr[0]) * joydev->nabs))
Daniel Mack987a6c02010-08-02 20:15:17 -0700537 return -EFAULT;
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400538
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400539 for (i = 0; i < joydev->nabs; i++) {
Daniel Mack987a6c02010-08-02 20:15:17 -0700540 int val = input_abs_get_val(dev, joydev->abspam[i]);
541 joydev->abs[i] = joydev_correct(val, &joydev->corr[i]);
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400542 }
543 return 0;
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400544
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400545 case JSIOCGCORR:
546 return copy_to_user(argp, joydev->corr,
547 sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0;
548
Stephen Kittec8b4b72009-08-12 01:12:08 -0700549 }
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):
Stephen Kitt999b8742009-08-25 19:24:22 -0700559 return joydev_handle_JSIOCSAXMAP(joydev, argp, _IOC_SIZE(cmd));
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400560
Stephen Kittec8b4b72009-08-12 01:12:08 -0700561 case (JSIOCGAXMAP & ~IOCSIZE_MASK):
562 len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->abspam));
Stephen Kitt999b8742009-08-25 19:24:22 -0700563 return copy_to_user(argp, joydev->abspam, len) ? -EFAULT : len;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400564
Stephen Kittec8b4b72009-08-12 01:12:08 -0700565 case (JSIOCSBTNMAP & ~IOCSIZE_MASK):
Stephen Kitt999b8742009-08-25 19:24:22 -0700566 return joydev_handle_JSIOCSBTNMAP(joydev, argp, _IOC_SIZE(cmd));
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400567
Stephen Kittec8b4b72009-08-12 01:12:08 -0700568 case (JSIOCGBTNMAP & ~IOCSIZE_MASK):
569 len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->keypam));
Stephen Kitt999b8742009-08-25 19:24:22 -0700570 return copy_to_user(argp, joydev->keypam, len) ? -EFAULT : len;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400571
Stephen Kittec8b4b72009-08-12 01:12:08 -0700572 case JSIOCGNAME(0):
573 name = dev->name;
574 if (!name)
575 return 0;
Thadeu Lima de Souza Cascardo3d5cb602009-05-09 16:08:04 -0700576
Stephen Kittec8b4b72009-08-12 01:12:08 -0700577 len = min_t(size_t, _IOC_SIZE(cmd), strlen(name) + 1);
578 return copy_to_user(argp, name, len) ? -EFAULT : len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 }
Stephen Kittec8b4b72009-08-12 01:12:08 -0700580
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 return -EINVAL;
582}
583
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500584#ifdef CONFIG_COMPAT
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400585static long joydev_compat_ioctl(struct file *file,
586 unsigned int cmd, unsigned long arg)
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500587{
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400588 struct joydev_client *client = file->private_data;
589 struct joydev *joydev = client->joydev;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500590 void __user *argp = (void __user *)arg;
591 s32 tmp32;
592 struct JS_DATA_SAVE_TYPE_32 ds32;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400593 int retval;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500594
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400595 retval = mutex_lock_interruptible(&joydev->mutex);
596 if (retval)
597 return retval;
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400598
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400599 if (!joydev->exist) {
600 retval = -ENODEV;
601 goto out;
602 }
603
604 switch (cmd) {
605
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500606 case JS_SET_TIMELIMIT:
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400607 retval = get_user(tmp32, (s32 __user *) arg);
608 if (retval == 0)
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500609 joydev->glue.JS_TIMELIMIT = tmp32;
610 break;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400611
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500612 case JS_GET_TIMELIMIT:
613 tmp32 = joydev->glue.JS_TIMELIMIT;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400614 retval = put_user(tmp32, (s32 __user *) arg);
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500615 break;
616
617 case JS_SET_ALL:
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400618 retval = copy_from_user(&ds32, argp,
619 sizeof(ds32)) ? -EFAULT : 0;
620 if (retval == 0) {
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500621 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
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400638 retval = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500639 break;
640
641 default:
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400642 retval = joydev_ioctl_common(joydev, cmd, argp);
643 break;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500644 }
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400645
646 out:
647 mutex_unlock(&joydev->mutex);
648 return retval;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500649}
650#endif /* CONFIG_COMPAT */
651
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400652static long joydev_ioctl(struct file *file,
653 unsigned int cmd, unsigned long arg)
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500654{
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400655 struct joydev_client *client = file->private_data;
656 struct joydev *joydev = client->joydev;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500657 void __user *argp = (void __user *)arg;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400658 int retval;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500659
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400660 retval = mutex_lock_interruptible(&joydev->mutex);
661 if (retval)
662 return retval;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500663
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400664 if (!joydev->exist) {
665 retval = -ENODEV;
666 goto out;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500667 }
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400668
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,
Baodong Chen41091ad2012-07-29 22:33:03 -0700683 sizeof(joydev->glue)) ? -EFAULT : 0;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400684 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;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500698}
699
Dmitry Torokhov66e66112006-09-14 01:31:59 -0400700static const struct file_operations joydev_fops = {
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400701 .owner = THIS_MODULE,
702 .read = joydev_read,
703 .poll = joydev_poll,
704 .open = joydev_open,
705 .release = joydev_release,
706 .unlocked_ioctl = joydev_ioctl,
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500707#ifdef CONFIG_COMPAT
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400708 .compat_ioctl = joydev_compat_ioctl,
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500709#endif
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400710 .fasync = joydev_fasync,
Arnd Bergmann6038f372010-08-15 18:52:59 +0200711 .llseek = no_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712};
713
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400714/*
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300715 * Mark device non-existent. This disables writes, ioctls and
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400716 * prevents new users from opening the device. Already posted
717 * blocking reads will stay, however new ones will fail.
718 */
719static void joydev_mark_dead(struct joydev *joydev)
720{
721 mutex_lock(&joydev->mutex);
Dmitry Torokhov20da92d2010-07-15 23:27:36 -0700722 joydev->exist = false;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400723 mutex_unlock(&joydev->mutex);
724}
725
726static void joydev_cleanup(struct joydev *joydev)
727{
728 struct input_handle *handle = &joydev->handle;
729
730 joydev_mark_dead(joydev);
731 joydev_hangup(joydev);
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700732
733 cdev_del(&joydev->cdev);
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400734
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300735 /* joydev is marked dead so no one else accesses joydev->open */
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400736 if (joydev->open)
737 input_close_device(handle);
738}
739
Thomas Hellstrom15397f12015-05-20 14:50:30 -0700740static 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}
Dmitry Torokhov0b7024ac2010-02-02 21:08:26 -0800797
798static 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
Thomas Hellstrom15397f12015-05-20 14:50:30 -0700808 /* Avoid absolute mice */
809 if (joydev_dev_is_absolute_mouse(dev))
810 return false;
811
Dmitry Torokhov0b7024ac2010-02-02 21:08:26 -0800812 return true;
813}
814
Dmitry Torokhov5b2a08262007-04-12 01:29:46 -0400815static int joydev_connect(struct input_handler *handler, struct input_dev *dev,
816 const struct input_device_id *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817{
818 struct joydev *joydev;
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700819 int i, j, t, minor, dev_no;
Dmitry Torokhov5b2a08262007-04-12 01:29:46 -0400820 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700822 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827 }
828
Dmitry Torokhov5b2a08262007-04-12 01:29:46 -0400829 joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL);
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700830 if (!joydev) {
831 error = -ENOMEM;
832 goto err_free_minor;
833 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400835 INIT_LIST_HEAD(&joydev->client_list);
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400836 spin_lock_init(&joydev->client_lock);
837 mutex_init(&joydev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 init_waitqueue_head(&joydev->wait);
Dmitry Torokhov20da92d2010-07-15 23:27:36 -0700839 joydev->exist = true;
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700840
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);
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400846
Dmitry Torokhova7097ff2008-04-01 00:22:53 -0400847 joydev->handle.dev = input_get_device(dev);
Thadeu Lima de Souza Cascardo3d5cb602009-05-09 16:08:04 -0700848 joydev->handle.name = dev_name(&joydev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 joydev->handle.handler = handler;
850 joydev->handle.private = joydev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851
Anshul Gargf23487c2015-07-08 16:41:39 -0700852 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857
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
Vojtech Pavlikf24949e2005-05-28 02:11:49 -0500865 for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 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];
Daniel Mack987a6c02010-08-02 20:15:17 -0700874 if (input_abs_get_max(dev, j) == input_abs_get_min(dev, j)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 joydev->corr[i].type = JS_CORR_NONE;
Daniel Mack987a6c02010-08-02 20:15:17 -0700876 joydev->abs[i] = input_abs_get_val(dev, j);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 continue;
878 }
879 joydev->corr[i].type = JS_CORR_BROKEN;
Daniel Mack987a6c02010-08-02 20:15:17 -0700880 joydev->corr[i].prec = input_abs_get_fuzz(dev, j);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881
Daniel Mack987a6c02010-08-02 20:15:17 -0700882 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);
885
886 t = (input_abs_get_max(dev, j) - input_abs_get_min(dev, j)) / 2
887 - 2 * input_abs_get_flat(dev, j);
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400888 if (t) {
889 joydev->corr[i].coef[2] = (1 << 29) / t;
890 joydev->corr[i].coef[3] = (1 << 29) / t;
891
Daniel Mack987a6c02010-08-02 20:15:17 -0700892 joydev->abs[i] =
893 joydev_correct(input_abs_get_val(dev, j),
894 joydev->corr + i);
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400895 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 }
897
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700898 joydev->dev.devt = MKDEV(INPUT_MAJOR, minor);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400899 joydev->dev.class = &input_class;
900 joydev->dev.parent = &dev->dev;
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400901 joydev->dev.release = joydev_free;
902 device_initialize(&joydev->dev);
903
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400904 error = input_register_handle(&joydev->handle);
Dmitry Torokhov5b2a08262007-04-12 01:29:46 -0400905 if (error)
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400906 goto err_free_joydev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700908 cdev_init(&joydev->cdev, &joydev_fops);
Dmitry Torokhov4a215aa2012-10-21 17:57:20 -0700909 joydev->cdev.kobj.parent = &joydev->dev.kobj;
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700910 error = cdev_add(&joydev->cdev, joydev->dev.devt, 1);
Dmitry Torokhov5b2a08262007-04-12 01:29:46 -0400911 if (error)
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400912 goto err_unregister_handle;
913
914 error = device_add(&joydev->dev);
915 if (error)
916 goto err_cleanup_joydev;
Dmitry Torokhov5b2a08262007-04-12 01:29:46 -0400917
918 return 0;
919
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400920 err_cleanup_joydev:
921 joydev_cleanup(joydev);
922 err_unregister_handle:
923 input_unregister_handle(&joydev->handle);
Dmitry Torokhov5b2a08262007-04-12 01:29:46 -0400924 err_free_joydev:
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400925 put_device(&joydev->dev);
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700926 err_free_minor:
927 input_free_minor(minor);
Dmitry Torokhov5b2a08262007-04-12 01:29:46 -0400928 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929}
930
931static void joydev_disconnect(struct input_handle *handle)
932{
933 struct joydev *joydev = handle->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400935 device_del(&joydev->dev);
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400936 joydev_cleanup(joydev);
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700937 input_free_minor(MINOR(joydev->dev.devt));
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400938 input_unregister_handle(handle);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400939 put_device(&joydev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940}
941
Dmitry Torokhov66e66112006-09-14 01:31:59 -0400942static const struct input_device_id joydev_ids[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 {
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400944 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
945 INPUT_DEVICE_ID_MATCH_ABSBIT,
Jiri Slaby7b19ada2007-10-18 23:40:32 -0700946 .evbit = { BIT_MASK(EV_ABS) },
947 .absbit = { BIT_MASK(ABS_X) },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 },
949 {
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400950 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
951 INPUT_DEVICE_ID_MATCH_ABSBIT,
Jiri Slaby7b19ada2007-10-18 23:40:32 -0700952 .evbit = { BIT_MASK(EV_ABS) },
953 .absbit = { BIT_MASK(ABS_WHEEL) },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 },
955 {
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400956 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
957 INPUT_DEVICE_ID_MATCH_ABSBIT,
Jiri Slaby7b19ada2007-10-18 23:40:32 -0700958 .evbit = { BIT_MASK(EV_ABS) },
959 .absbit = { BIT_MASK(ABS_THROTTLE) },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960 },
Christoph Fritz26a6931b2010-04-24 21:41:05 -0700961 {
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 },
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400979 { } /* Terminating entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980};
981
982MODULE_DEVICE_TABLE(input, joydev_ids);
983
984static struct input_handler joydev_handler = {
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400985 .event = joydev_event,
Dmitry Torokhov0b7024ac2010-02-02 21:08:26 -0800986 .match = joydev_match,
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400987 .connect = joydev_connect,
988 .disconnect = joydev_disconnect,
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700989 .legacy_minors = true,
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400990 .minor = JOYDEV_MINOR_BASE,
991 .name = "joydev",
992 .id_table = joydev_ids,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993};
994
995static int __init joydev_init(void)
996{
Dmitry Torokhov4263cf02006-09-14 01:32:39 -0400997 return input_register_handler(&joydev_handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998}
999
1000static void __exit joydev_exit(void)
1001{
1002 input_unregister_handler(&joydev_handler);
1003}
1004
1005module_init(joydev_init);
1006module_exit(joydev_exit);