blob: 1d247bcf2ae25b20508f734d72b4904f704987d8 [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. */
447 abspam = kmalloc(len, GFP_KERNEL);
448 if (!abspam)
449 return -ENOMEM;
450
451 if (copy_from_user(abspam, argp, len)) {
452 retval = -EFAULT;
453 goto out;
454 }
455
456 for (i = 0; i < joydev->nabs; i++) {
457 if (abspam[i] > ABS_MAX) {
458 retval = -EINVAL;
459 goto out;
460 }
461 }
462
463 memcpy(joydev->abspam, abspam, len);
464
Kenneth Watersd2520a42010-09-21 00:58:23 -0700465 for (i = 0; i < joydev->nabs; i++)
466 joydev->absmap[joydev->abspam[i]] = i;
467
Stephen Kitt999b8742009-08-25 19:24:22 -0700468 out:
469 kfree(abspam);
470 return retval;
471}
472
473static int joydev_handle_JSIOCSBTNMAP(struct joydev *joydev,
474 void __user *argp, size_t len)
475{
476 __u16 *keypam;
477 int i;
478 int retval = 0;
479
480 len = min(len, sizeof(joydev->keypam));
481
482 /* Validate the map. */
483 keypam = kmalloc(len, GFP_KERNEL);
484 if (!keypam)
485 return -ENOMEM;
486
487 if (copy_from_user(keypam, argp, len)) {
488 retval = -EFAULT;
489 goto out;
490 }
491
492 for (i = 0; i < joydev->nkey; i++) {
493 if (keypam[i] > KEY_MAX || keypam[i] < BTN_MISC) {
494 retval = -EINVAL;
495 goto out;
496 }
497 }
498
499 memcpy(joydev->keypam, keypam, len);
500
501 for (i = 0; i < joydev->nkey; i++)
502 joydev->keymap[keypam[i] - BTN_MISC] = i;
503
504 out:
505 kfree(keypam);
506 return retval;
507}
508
509
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400510static int joydev_ioctl_common(struct joydev *joydev,
511 unsigned int cmd, void __user *argp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 struct input_dev *dev = joydev->handle.dev;
Stephen Kittec8b4b72009-08-12 01:12:08 -0700514 size_t len;
Daniel Mack987a6c02010-08-02 20:15:17 -0700515 int i;
Stephen Kittec8b4b72009-08-12 01:12:08 -0700516 const char *name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517
Stephen Kittec8b4b72009-08-12 01:12:08 -0700518 /* Process fixed-sized commands. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 switch (cmd) {
520
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400521 case JS_SET_CAL:
522 return copy_from_user(&joydev->glue.JS_CORR, argp,
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500523 sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400524
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400525 case JS_GET_CAL:
526 return copy_to_user(argp, &joydev->glue.JS_CORR,
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500527 sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400528
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400529 case JS_SET_TIMEOUT:
530 return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400531
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400532 case JS_GET_TIMEOUT:
533 return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400535 case JSIOCGVERSION:
536 return put_user(JS_VERSION, (__u32 __user *) argp);
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400537
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400538 case JSIOCGAXES:
539 return put_user(joydev->nabs, (__u8 __user *) argp);
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400540
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400541 case JSIOCGBUTTONS:
542 return put_user(joydev->nkey, (__u8 __user *) argp);
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400543
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400544 case JSIOCSCORR:
545 if (copy_from_user(joydev->corr, argp,
546 sizeof(joydev->corr[0]) * joydev->nabs))
Daniel Mack987a6c02010-08-02 20:15:17 -0700547 return -EFAULT;
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400548
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400549 for (i = 0; i < joydev->nabs; i++) {
Daniel Mack987a6c02010-08-02 20:15:17 -0700550 int val = input_abs_get_val(dev, joydev->abspam[i]);
551 joydev->abs[i] = joydev_correct(val, &joydev->corr[i]);
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400552 }
553 return 0;
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400554
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400555 case JSIOCGCORR:
556 return copy_to_user(argp, joydev->corr,
557 sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0;
558
Stephen Kittec8b4b72009-08-12 01:12:08 -0700559 }
560
561 /*
562 * Process variable-sized commands (the axis and button map commands
563 * are considered variable-sized to decouple them from the values of
564 * ABS_MAX and KEY_MAX).
565 */
566 switch (cmd & ~IOCSIZE_MASK) {
567
568 case (JSIOCSAXMAP & ~IOCSIZE_MASK):
Stephen Kitt999b8742009-08-25 19:24:22 -0700569 return joydev_handle_JSIOCSAXMAP(joydev, argp, _IOC_SIZE(cmd));
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400570
Stephen Kittec8b4b72009-08-12 01:12:08 -0700571 case (JSIOCGAXMAP & ~IOCSIZE_MASK):
572 len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->abspam));
Stephen Kitt999b8742009-08-25 19:24:22 -0700573 return copy_to_user(argp, joydev->abspam, len) ? -EFAULT : len;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400574
Stephen Kittec8b4b72009-08-12 01:12:08 -0700575 case (JSIOCSBTNMAP & ~IOCSIZE_MASK):
Stephen Kitt999b8742009-08-25 19:24:22 -0700576 return joydev_handle_JSIOCSBTNMAP(joydev, argp, _IOC_SIZE(cmd));
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400577
Stephen Kittec8b4b72009-08-12 01:12:08 -0700578 case (JSIOCGBTNMAP & ~IOCSIZE_MASK):
579 len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->keypam));
Stephen Kitt999b8742009-08-25 19:24:22 -0700580 return copy_to_user(argp, joydev->keypam, len) ? -EFAULT : len;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400581
Stephen Kittec8b4b72009-08-12 01:12:08 -0700582 case JSIOCGNAME(0):
583 name = dev->name;
584 if (!name)
585 return 0;
Thadeu Lima de Souza Cascardo3d5cb602009-05-09 16:08:04 -0700586
Stephen Kittec8b4b72009-08-12 01:12:08 -0700587 len = min_t(size_t, _IOC_SIZE(cmd), strlen(name) + 1);
588 return copy_to_user(argp, name, len) ? -EFAULT : len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 }
Stephen Kittec8b4b72009-08-12 01:12:08 -0700590
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 return -EINVAL;
592}
593
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500594#ifdef CONFIG_COMPAT
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400595static long joydev_compat_ioctl(struct file *file,
596 unsigned int cmd, unsigned long arg)
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500597{
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400598 struct joydev_client *client = file->private_data;
599 struct joydev *joydev = client->joydev;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500600 void __user *argp = (void __user *)arg;
601 s32 tmp32;
602 struct JS_DATA_SAVE_TYPE_32 ds32;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400603 int retval;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500604
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400605 retval = mutex_lock_interruptible(&joydev->mutex);
606 if (retval)
607 return retval;
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400608
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400609 if (!joydev->exist) {
610 retval = -ENODEV;
611 goto out;
612 }
613
614 switch (cmd) {
615
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500616 case JS_SET_TIMELIMIT:
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400617 retval = get_user(tmp32, (s32 __user *) arg);
618 if (retval == 0)
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500619 joydev->glue.JS_TIMELIMIT = tmp32;
620 break;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400621
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500622 case JS_GET_TIMELIMIT:
623 tmp32 = joydev->glue.JS_TIMELIMIT;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400624 retval = put_user(tmp32, (s32 __user *) arg);
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500625 break;
626
627 case JS_SET_ALL:
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400628 retval = copy_from_user(&ds32, argp,
629 sizeof(ds32)) ? -EFAULT : 0;
630 if (retval == 0) {
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500631 joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT;
632 joydev->glue.BUSY = ds32.BUSY;
633 joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME;
634 joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT;
635 joydev->glue.JS_SAVE = ds32.JS_SAVE;
636 joydev->glue.JS_CORR = ds32.JS_CORR;
637 }
638 break;
639
640 case JS_GET_ALL:
641 ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT;
642 ds32.BUSY = joydev->glue.BUSY;
643 ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME;
644 ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT;
645 ds32.JS_SAVE = joydev->glue.JS_SAVE;
646 ds32.JS_CORR = joydev->glue.JS_CORR;
647
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400648 retval = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500649 break;
650
651 default:
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400652 retval = joydev_ioctl_common(joydev, cmd, argp);
653 break;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500654 }
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400655
656 out:
657 mutex_unlock(&joydev->mutex);
658 return retval;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500659}
660#endif /* CONFIG_COMPAT */
661
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400662static long joydev_ioctl(struct file *file,
663 unsigned int cmd, unsigned long arg)
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500664{
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400665 struct joydev_client *client = file->private_data;
666 struct joydev *joydev = client->joydev;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500667 void __user *argp = (void __user *)arg;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400668 int retval;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500669
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400670 retval = mutex_lock_interruptible(&joydev->mutex);
671 if (retval)
672 return retval;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500673
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400674 if (!joydev->exist) {
675 retval = -ENODEV;
676 goto out;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500677 }
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400678
679 switch (cmd) {
680
681 case JS_SET_TIMELIMIT:
682 retval = get_user(joydev->glue.JS_TIMELIMIT,
683 (long __user *) arg);
684 break;
685
686 case JS_GET_TIMELIMIT:
687 retval = put_user(joydev->glue.JS_TIMELIMIT,
688 (long __user *) arg);
689 break;
690
691 case JS_SET_ALL:
692 retval = copy_from_user(&joydev->glue, argp,
Baodong Chen41091ad2012-07-29 22:33:03 -0700693 sizeof(joydev->glue)) ? -EFAULT : 0;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400694 break;
695
696 case JS_GET_ALL:
697 retval = copy_to_user(argp, &joydev->glue,
698 sizeof(joydev->glue)) ? -EFAULT : 0;
699 break;
700
701 default:
702 retval = joydev_ioctl_common(joydev, cmd, argp);
703 break;
704 }
705 out:
706 mutex_unlock(&joydev->mutex);
707 return retval;
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500708}
709
Dmitry Torokhov66e66112006-09-14 01:31:59 -0400710static const struct file_operations joydev_fops = {
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400711 .owner = THIS_MODULE,
712 .read = joydev_read,
713 .poll = joydev_poll,
714 .open = joydev_open,
715 .release = joydev_release,
716 .unlocked_ioctl = joydev_ioctl,
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500717#ifdef CONFIG_COMPAT
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400718 .compat_ioctl = joydev_compat_ioctl,
Jeremy Fitzhardinge024ac442005-05-29 02:26:31 -0500719#endif
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400720 .fasync = joydev_fasync,
Arnd Bergmann6038f372010-08-15 18:52:59 +0200721 .llseek = no_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722};
723
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400724/*
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300725 * Mark device non-existent. This disables writes, ioctls and
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400726 * prevents new users from opening the device. Already posted
727 * blocking reads will stay, however new ones will fail.
728 */
729static void joydev_mark_dead(struct joydev *joydev)
730{
731 mutex_lock(&joydev->mutex);
Dmitry Torokhov20da92d2010-07-15 23:27:36 -0700732 joydev->exist = false;
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400733 mutex_unlock(&joydev->mutex);
734}
735
736static void joydev_cleanup(struct joydev *joydev)
737{
738 struct input_handle *handle = &joydev->handle;
739
740 joydev_mark_dead(joydev);
741 joydev_hangup(joydev);
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700742
743 cdev_del(&joydev->cdev);
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400744
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300745 /* joydev is marked dead so no one else accesses joydev->open */
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400746 if (joydev->open)
747 input_close_device(handle);
748}
749
Thomas Hellstrom15397f12015-05-20 14:50:30 -0700750static bool joydev_dev_is_absolute_mouse(struct input_dev *dev)
751{
752 DECLARE_BITMAP(jd_scratch, KEY_CNT);
753
754 BUILD_BUG_ON(ABS_CNT > KEY_CNT || EV_CNT > KEY_CNT);
755
756 /*
757 * Virtualization (VMware, etc) and remote management (HP
758 * ILO2) solutions use absolute coordinates for their virtual
759 * pointing devices so that there is one-to-one relationship
760 * between pointer position on the host screen and virtual
761 * guest screen, and so their mice use ABS_X, ABS_Y and 3
762 * primary button events. This clashes with what joydev
763 * considers to be joysticks (a device with at minimum ABS_X
764 * axis).
765 *
766 * Here we are trying to separate absolute mice from
767 * joysticks. A device is, for joystick detection purposes,
768 * considered to be an absolute mouse if the following is
769 * true:
770 *
771 * 1) Event types are exactly EV_ABS, EV_KEY and EV_SYN.
772 * 2) Absolute events are exactly ABS_X and ABS_Y.
773 * 3) Keys are exactly BTN_LEFT, BTN_RIGHT and BTN_MIDDLE.
774 * 4) Device is not on "Amiga" bus.
775 */
776
777 bitmap_zero(jd_scratch, EV_CNT);
778 __set_bit(EV_ABS, jd_scratch);
779 __set_bit(EV_KEY, jd_scratch);
780 __set_bit(EV_SYN, jd_scratch);
781 if (!bitmap_equal(jd_scratch, dev->evbit, EV_CNT))
782 return false;
783
784 bitmap_zero(jd_scratch, ABS_CNT);
785 __set_bit(ABS_X, jd_scratch);
786 __set_bit(ABS_Y, jd_scratch);
787 if (!bitmap_equal(dev->absbit, jd_scratch, ABS_CNT))
788 return false;
789
790 bitmap_zero(jd_scratch, KEY_CNT);
791 __set_bit(BTN_LEFT, jd_scratch);
792 __set_bit(BTN_RIGHT, jd_scratch);
793 __set_bit(BTN_MIDDLE, jd_scratch);
794
795 if (!bitmap_equal(dev->keybit, jd_scratch, KEY_CNT))
796 return false;
797
798 /*
799 * Amiga joystick (amijoy) historically uses left/middle/right
800 * button events.
801 */
802 if (dev->id.bustype == BUS_AMIGA)
803 return false;
804
805 return true;
806}
Dmitry Torokhov0b7024ac2010-02-02 21:08:26 -0800807
808static bool joydev_match(struct input_handler *handler, struct input_dev *dev)
809{
810 /* Avoid touchpads and touchscreens */
811 if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_TOUCH, dev->keybit))
812 return false;
813
814 /* Avoid tablets, digitisers and similar devices */
815 if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_DIGI, dev->keybit))
816 return false;
817
Thomas Hellstrom15397f12015-05-20 14:50:30 -0700818 /* Avoid absolute mice */
819 if (joydev_dev_is_absolute_mouse(dev))
820 return false;
821
Dmitry Torokhov0b7024ac2010-02-02 21:08:26 -0800822 return true;
823}
824
Dmitry Torokhov5b2a0822007-04-12 01:29:46 -0400825static int joydev_connect(struct input_handler *handler, struct input_dev *dev,
826 const struct input_device_id *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827{
828 struct joydev *joydev;
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700829 int i, j, t, minor, dev_no;
Dmitry Torokhov5b2a0822007-04-12 01:29:46 -0400830 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700832 minor = input_get_new_minor(JOYDEV_MINOR_BASE, JOYDEV_MINORS, true);
833 if (minor < 0) {
834 error = minor;
835 pr_err("failed to reserve new minor: %d\n", error);
836 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837 }
838
Dmitry Torokhov5b2a0822007-04-12 01:29:46 -0400839 joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL);
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700840 if (!joydev) {
841 error = -ENOMEM;
842 goto err_free_minor;
843 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400845 INIT_LIST_HEAD(&joydev->client_list);
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400846 spin_lock_init(&joydev->client_lock);
847 mutex_init(&joydev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 init_waitqueue_head(&joydev->wait);
Dmitry Torokhov20da92d2010-07-15 23:27:36 -0700849 joydev->exist = true;
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700850
851 dev_no = minor;
852 /* Normalize device number if it falls into legacy range */
853 if (dev_no < JOYDEV_MINOR_BASE + JOYDEV_MINORS)
854 dev_no -= JOYDEV_MINOR_BASE;
855 dev_set_name(&joydev->dev, "js%d", dev_no);
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400856
Dmitry Torokhova7097ff2008-04-01 00:22:53 -0400857 joydev->handle.dev = input_get_device(dev);
Thadeu Lima de Souza Cascardo3d5cb602009-05-09 16:08:04 -0700858 joydev->handle.name = dev_name(&joydev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 joydev->handle.handler = handler;
860 joydev->handle.private = joydev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861
Daniel Mack81c2a3b2010-05-20 22:52:58 -0700862 for (i = 0; i < ABS_CNT; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 if (test_bit(i, dev->absbit)) {
864 joydev->absmap[i] = joydev->nabs;
865 joydev->abspam[joydev->nabs] = i;
866 joydev->nabs++;
867 }
868
869 for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++)
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
Vojtech Pavlikf24949e2005-05-28 02:11:49 -0500876 for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 if (test_bit(i + BTN_MISC, dev->keybit)) {
878 joydev->keymap[i] = joydev->nkey;
879 joydev->keypam[joydev->nkey] = i + BTN_MISC;
880 joydev->nkey++;
881 }
882
883 for (i = 0; i < joydev->nabs; i++) {
884 j = joydev->abspam[i];
Daniel Mack987a6c02010-08-02 20:15:17 -0700885 if (input_abs_get_max(dev, j) == input_abs_get_min(dev, j)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886 joydev->corr[i].type = JS_CORR_NONE;
Daniel Mack987a6c02010-08-02 20:15:17 -0700887 joydev->abs[i] = input_abs_get_val(dev, j);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 continue;
889 }
890 joydev->corr[i].type = JS_CORR_BROKEN;
Daniel Mack987a6c02010-08-02 20:15:17 -0700891 joydev->corr[i].prec = input_abs_get_fuzz(dev, j);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892
Daniel Mack987a6c02010-08-02 20:15:17 -0700893 t = (input_abs_get_max(dev, j) + input_abs_get_min(dev, j)) / 2;
894 joydev->corr[i].coef[0] = t - input_abs_get_flat(dev, j);
895 joydev->corr[i].coef[1] = t + input_abs_get_flat(dev, j);
896
897 t = (input_abs_get_max(dev, j) - input_abs_get_min(dev, j)) / 2
898 - 2 * input_abs_get_flat(dev, j);
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400899 if (t) {
900 joydev->corr[i].coef[2] = (1 << 29) / t;
901 joydev->corr[i].coef[3] = (1 << 29) / t;
902
Daniel Mack987a6c02010-08-02 20:15:17 -0700903 joydev->abs[i] =
904 joydev_correct(input_abs_get_val(dev, j),
905 joydev->corr + i);
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400906 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 }
908
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700909 joydev->dev.devt = MKDEV(INPUT_MAJOR, minor);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400910 joydev->dev.class = &input_class;
911 joydev->dev.parent = &dev->dev;
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400912 joydev->dev.release = joydev_free;
913 device_initialize(&joydev->dev);
914
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400915 error = input_register_handle(&joydev->handle);
Dmitry Torokhov5b2a0822007-04-12 01:29:46 -0400916 if (error)
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400917 goto err_free_joydev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700919 cdev_init(&joydev->cdev, &joydev_fops);
Dmitry Torokhov4a215aa2012-10-21 17:57:20 -0700920 joydev->cdev.kobj.parent = &joydev->dev.kobj;
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700921 error = cdev_add(&joydev->cdev, joydev->dev.devt, 1);
Dmitry Torokhov5b2a0822007-04-12 01:29:46 -0400922 if (error)
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400923 goto err_unregister_handle;
924
925 error = device_add(&joydev->dev);
926 if (error)
927 goto err_cleanup_joydev;
Dmitry Torokhov5b2a0822007-04-12 01:29:46 -0400928
929 return 0;
930
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400931 err_cleanup_joydev:
932 joydev_cleanup(joydev);
933 err_unregister_handle:
934 input_unregister_handle(&joydev->handle);
Dmitry Torokhov5b2a0822007-04-12 01:29:46 -0400935 err_free_joydev:
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400936 put_device(&joydev->dev);
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700937 err_free_minor:
938 input_free_minor(minor);
Dmitry Torokhov5b2a0822007-04-12 01:29:46 -0400939 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940}
941
942static void joydev_disconnect(struct input_handle *handle)
943{
944 struct joydev *joydev = handle->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400946 device_del(&joydev->dev);
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400947 joydev_cleanup(joydev);
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -0700948 input_free_minor(MINOR(joydev->dev.devt));
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400949 input_unregister_handle(handle);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400950 put_device(&joydev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951}
952
Dmitry Torokhov66e66112006-09-14 01:31:59 -0400953static const struct input_device_id joydev_ids[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 {
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400955 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
956 INPUT_DEVICE_ID_MATCH_ABSBIT,
Jiri Slaby7b19ada2007-10-18 23:40:32 -0700957 .evbit = { BIT_MASK(EV_ABS) },
958 .absbit = { BIT_MASK(ABS_X) },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 },
960 {
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400961 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
962 INPUT_DEVICE_ID_MATCH_ABSBIT,
Jiri Slaby7b19ada2007-10-18 23:40:32 -0700963 .evbit = { BIT_MASK(EV_ABS) },
964 .absbit = { BIT_MASK(ABS_WHEEL) },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 },
966 {
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400967 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
968 INPUT_DEVICE_ID_MATCH_ABSBIT,
Jiri Slaby7b19ada2007-10-18 23:40:32 -0700969 .evbit = { BIT_MASK(EV_ABS) },
970 .absbit = { BIT_MASK(ABS_THROTTLE) },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 },
Christoph Fritz26a6931b2010-04-24 21:41:05 -0700972 {
973 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
974 INPUT_DEVICE_ID_MATCH_KEYBIT,
975 .evbit = { BIT_MASK(EV_KEY) },
976 .keybit = {[BIT_WORD(BTN_JOYSTICK)] = BIT_MASK(BTN_JOYSTICK) },
977 },
978 {
979 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
980 INPUT_DEVICE_ID_MATCH_KEYBIT,
981 .evbit = { BIT_MASK(EV_KEY) },
982 .keybit = { [BIT_WORD(BTN_GAMEPAD)] = BIT_MASK(BTN_GAMEPAD) },
983 },
984 {
985 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
986 INPUT_DEVICE_ID_MATCH_KEYBIT,
987 .evbit = { BIT_MASK(EV_KEY) },
988 .keybit = { [BIT_WORD(BTN_TRIGGER_HAPPY)] = BIT_MASK(BTN_TRIGGER_HAPPY) },
989 },
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400990 { } /* Terminating entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991};
992
993MODULE_DEVICE_TABLE(input, joydev_ids);
994
995static struct input_handler joydev_handler = {
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400996 .event = joydev_event,
Dmitry Torokhov0b7024ac2010-02-02 21:08:26 -0800997 .match = joydev_match,
Dmitry Torokhovb1262072007-08-30 00:22:32 -0400998 .connect = joydev_connect,
999 .disconnect = joydev_disconnect,
Dmitry Torokhov7f8d4ca2012-10-08 09:07:24 -07001000 .legacy_minors = true,
Dmitry Torokhovb1262072007-08-30 00:22:32 -04001001 .minor = JOYDEV_MINOR_BASE,
1002 .name = "joydev",
1003 .id_table = joydev_ids,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004};
1005
1006static int __init joydev_init(void)
1007{
Dmitry Torokhov4263cf02006-09-14 01:32:39 -04001008 return input_register_handler(&joydev_handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009}
1010
1011static void __exit joydev_exit(void)
1012{
1013 input_unregister_handler(&joydev_handler);
1014}
1015
1016module_init(joydev_init);
1017module_exit(joydev_exit);