blob: d528a2dba06418eb5e80097552463e9abec5db05 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Input driver to ExplorerPS/2 device driver module.
3 *
4 * Copyright (c) 1999-2002 Vojtech Pavlik
5 * Copyright (c) 2004 Dmitry Torokhov
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 version 2 as published by
9 * the Free Software Foundation.
10 */
11
Dmitry Torokhov4f004692005-09-15 02:01:38 -050012#define MOUSEDEV_MINOR_BASE 32
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#define MOUSEDEV_MINORS 32
14#define MOUSEDEV_MIX 31
15
Alexey Dobriyana99bbaf2009-10-04 16:11:37 +040016#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/slab.h>
18#include <linux/poll.h>
19#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <linux/init.h>
21#include <linux/input.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/random.h>
23#include <linux/major.h>
24#include <linux/device.h>
Daniel Mack987a6c02010-08-02 20:15:17 -070025#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
27#include <linux/miscdevice.h>
28#endif
29
30MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
31MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces");
32MODULE_LICENSE("GPL");
33
34#ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_X
35#define CONFIG_INPUT_MOUSEDEV_SCREEN_X 1024
36#endif
37#ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_Y
38#define CONFIG_INPUT_MOUSEDEV_SCREEN_Y 768
39#endif
40
41static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X;
Dmitry Torokhov84c12b22005-12-11 12:41:03 -050042module_param(xres, uint, 0644);
Linus Torvalds1da177e2005-04-16 15:20:36 -070043MODULE_PARM_DESC(xres, "Horizontal screen resolution");
44
45static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y;
Dmitry Torokhov84c12b22005-12-11 12:41:03 -050046module_param(yres, uint, 0644);
Linus Torvalds1da177e2005-04-16 15:20:36 -070047MODULE_PARM_DESC(yres, "Vertical screen resolution");
48
49static unsigned tap_time = 200;
Dmitry Torokhov84c12b22005-12-11 12:41:03 -050050module_param(tap_time, uint, 0644);
Linus Torvalds1da177e2005-04-16 15:20:36 -070051MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)");
52
53struct mousedev_hw_data {
54 int dx, dy, dz;
55 int x, y;
56 int abs_event;
57 unsigned long buttons;
58};
59
60struct mousedev {
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 int open;
62 int minor;
Dmitry Torokhov464b2412007-08-30 00:22:24 -040063 struct input_handle handle;
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 wait_queue_head_t wait;
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -040065 struct list_head client_list;
Dmitry Torokhov464b2412007-08-30 00:22:24 -040066 spinlock_t client_lock; /* protects client_list */
67 struct mutex mutex;
Dmitry Torokhov9657d752007-06-14 23:32:24 -040068 struct device dev;
Dmitry Torokhov20da92d2010-07-15 23:27:36 -070069 bool exist;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Dmitry Torokhovd542ed82007-04-12 01:30:15 -040071 struct list_head mixdev_node;
72 int mixdev_open;
73
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 struct mousedev_hw_data packet;
75 unsigned int pkt_count;
76 int old_x[4], old_y[4];
77 int frac_dx, frac_dy;
78 unsigned long touch;
79};
80
81enum mousedev_emul {
82 MOUSEDEV_EMUL_PS2,
83 MOUSEDEV_EMUL_IMPS,
84 MOUSEDEV_EMUL_EXPS
85};
86
87struct mousedev_motion {
88 int dx, dy, dz;
89 unsigned long buttons;
90};
91
92#define PACKET_QUEUE_LEN 16
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -040093struct mousedev_client {
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 struct fasync_struct *fasync;
95 struct mousedev *mousedev;
96 struct list_head node;
97
98 struct mousedev_motion packets[PACKET_QUEUE_LEN];
99 unsigned int head, tail;
100 spinlock_t packet_lock;
101 int pos_x, pos_y;
102
103 signed char ps2[6];
104 unsigned char ready, buffer, bufsiz;
105 unsigned char imexseq, impsseq;
106 enum mousedev_emul mode;
Pavel Machekc1e4c8d2005-05-27 12:53:03 -0700107 unsigned long last_buttons;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108};
109
110#define MOUSEDEV_SEQ_LEN 6
111
112static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 };
113static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 };
114
115static struct input_handler mousedev_handler;
116
117static struct mousedev *mousedev_table[MOUSEDEV_MINORS];
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400118static DEFINE_MUTEX(mousedev_table_mutex);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400119static struct mousedev *mousedev_mix;
Dmitry Torokhovd542ed82007-04-12 01:30:15 -0400120static LIST_HEAD(mousedev_mix_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400122static void mixdev_open_devices(void);
123static void mixdev_close_devices(void);
124
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125#define fx(i) (mousedev->old_x[(mousedev->pkt_count - (i)) & 03])
126#define fy(i) (mousedev->old_y[(mousedev->pkt_count - (i)) & 03])
127
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400128static void mousedev_touchpad_event(struct input_dev *dev,
129 struct mousedev *mousedev,
130 unsigned int code, int value)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131{
132 int size, tmp;
133 enum { FRACTION_DENOM = 128 };
134
Dmitry Torokhov0d9d93c2007-04-12 01:31:55 -0400135 switch (code) {
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400136
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400137 case ABS_X:
Daniel Mack987a6c02010-08-02 20:15:17 -0700138
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400139 fx(0) = value;
140 if (mousedev->touch && mousedev->pkt_count >= 2) {
Christoph Fritz268ba5c2010-08-24 00:33:37 -0700141 size = input_abs_get_max(dev, ABS_X) -
142 input_abs_get_min(dev, ABS_X);
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400143 if (size == 0)
144 size = 256 * 2;
Daniel Mack987a6c02010-08-02 20:15:17 -0700145
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400146 tmp = ((value - fx(2)) * 256 * FRACTION_DENOM) / size;
147 tmp += mousedev->frac_dx;
148 mousedev->packet.dx = tmp / FRACTION_DENOM;
149 mousedev->frac_dx =
150 tmp - mousedev->packet.dx * FRACTION_DENOM;
151 }
152 break;
153
154 case ABS_Y:
155 fy(0) = value;
156 if (mousedev->touch && mousedev->pkt_count >= 2) {
Daniel Mack987a6c02010-08-02 20:15:17 -0700157 /* use X size for ABS_Y to keep the same scale */
Christoph Fritz268ba5c2010-08-24 00:33:37 -0700158 size = input_abs_get_max(dev, ABS_X) -
159 input_abs_get_min(dev, ABS_X);
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400160 if (size == 0)
161 size = 256 * 2;
Daniel Mack987a6c02010-08-02 20:15:17 -0700162
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400163 tmp = -((value - fy(2)) * 256 * FRACTION_DENOM) / size;
164 tmp += mousedev->frac_dy;
165 mousedev->packet.dy = tmp / FRACTION_DENOM;
166 mousedev->frac_dy = tmp -
167 mousedev->packet.dy * FRACTION_DENOM;
168 }
169 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 }
171}
172
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400173static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev,
174 unsigned int code, int value)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175{
Daniel Mack987a6c02010-08-02 20:15:17 -0700176 int min, max, size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177
178 switch (code) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400180 case ABS_X:
Daniel Mack987a6c02010-08-02 20:15:17 -0700181 min = input_abs_get_min(dev, ABS_X);
182 max = input_abs_get_max(dev, ABS_X);
183
184 size = max - min;
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400185 if (size == 0)
186 size = xres ? : 1;
Daniel Mack987a6c02010-08-02 20:15:17 -0700187
188 clamp(value, min, max);
189
190 mousedev->packet.x = ((value - min) * xres) / size;
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400191 mousedev->packet.abs_event = 1;
192 break;
193
194 case ABS_Y:
Daniel Mack987a6c02010-08-02 20:15:17 -0700195 min = input_abs_get_min(dev, ABS_Y);
196 max = input_abs_get_max(dev, ABS_Y);
197
198 size = max - min;
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400199 if (size == 0)
200 size = yres ? : 1;
Daniel Mack987a6c02010-08-02 20:15:17 -0700201
202 clamp(value, min, max);
203
204 mousedev->packet.y = yres - ((value - min) * yres) / size;
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400205 mousedev->packet.abs_event = 1;
206 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 }
208}
209
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400210static void mousedev_rel_event(struct mousedev *mousedev,
211 unsigned int code, int value)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212{
213 switch (code) {
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400214 case REL_X:
215 mousedev->packet.dx += value;
216 break;
217
218 case REL_Y:
219 mousedev->packet.dy -= value;
220 break;
221
222 case REL_WHEEL:
223 mousedev->packet.dz -= value;
224 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 }
226}
227
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400228static void mousedev_key_event(struct mousedev *mousedev,
229 unsigned int code, int value)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230{
231 int index;
232
233 switch (code) {
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400234
235 case BTN_TOUCH:
236 case BTN_0:
237 case BTN_LEFT: index = 0; break;
238
239 case BTN_STYLUS:
240 case BTN_1:
241 case BTN_RIGHT: index = 1; break;
242
243 case BTN_2:
244 case BTN_FORWARD:
245 case BTN_STYLUS2:
246 case BTN_MIDDLE: index = 2; break;
247
248 case BTN_3:
249 case BTN_BACK:
250 case BTN_SIDE: index = 3; break;
251
252 case BTN_4:
253 case BTN_EXTRA: index = 4; break;
254
255 default: return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 }
257
258 if (value) {
259 set_bit(index, &mousedev->packet.buttons);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400260 set_bit(index, &mousedev_mix->packet.buttons);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 } else {
262 clear_bit(index, &mousedev->packet.buttons);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400263 clear_bit(index, &mousedev_mix->packet.buttons);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 }
265}
266
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400267static void mousedev_notify_readers(struct mousedev *mousedev,
268 struct mousedev_hw_data *packet)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269{
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400270 struct mousedev_client *client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 struct mousedev_motion *p;
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400272 unsigned int new_head;
Dmitry Torokhov81211522005-06-01 02:39:36 -0500273 int wake_readers = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
Dmitry Torokhov82ba56c2007-10-13 15:46:55 -0400275 rcu_read_lock();
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400276 list_for_each_entry_rcu(client, &mousedev->client_list, node) {
277
278 /* Just acquire the lock, interrupts already disabled */
279 spin_lock(&client->packet_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400281 p = &client->packets[client->head];
282 if (client->ready && p->buttons != mousedev->packet.buttons) {
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400283 new_head = (client->head + 1) % PACKET_QUEUE_LEN;
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400284 if (new_head != client->tail) {
285 p = &client->packets[client->head = new_head];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 memset(p, 0, sizeof(struct mousedev_motion));
287 }
288 }
289
290 if (packet->abs_event) {
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400291 p->dx += packet->x - client->pos_x;
292 p->dy += packet->y - client->pos_y;
293 client->pos_x = packet->x;
294 client->pos_y = packet->y;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 }
296
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400297 client->pos_x += packet->dx;
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400298 client->pos_x = client->pos_x < 0 ?
299 0 : (client->pos_x >= xres ? xres : client->pos_x);
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400300 client->pos_y += packet->dy;
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400301 client->pos_y = client->pos_y < 0 ?
302 0 : (client->pos_y >= yres ? yres : client->pos_y);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
304 p->dx += packet->dx;
305 p->dy += packet->dy;
306 p->dz += packet->dz;
307 p->buttons = mousedev->packet.buttons;
308
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400309 if (p->dx || p->dy || p->dz ||
310 p->buttons != client->last_buttons)
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400311 client->ready = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400313 spin_unlock(&client->packet_lock);
Pavel Machekc1e4c8d2005-05-27 12:53:03 -0700314
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400315 if (client->ready) {
316 kill_fasync(&client->fasync, SIGIO, POLL_IN);
Dmitry Torokhov81211522005-06-01 02:39:36 -0500317 wake_readers = 1;
318 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 }
Dmitry Torokhov82ba56c2007-10-13 15:46:55 -0400320 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
Dmitry Torokhov81211522005-06-01 02:39:36 -0500322 if (wake_readers)
323 wake_up_interruptible(&mousedev->wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324}
325
326static void mousedev_touchpad_touch(struct mousedev *mousedev, int value)
327{
328 if (!value) {
329 if (mousedev->touch &&
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400330 time_before(jiffies,
331 mousedev->touch + msecs_to_jiffies(tap_time))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 /*
333 * Toggle left button to emulate tap.
334 * We rely on the fact that mousedev_mix always has 0
335 * motion packet so we won't mess current position.
336 */
337 set_bit(0, &mousedev->packet.buttons);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400338 set_bit(0, &mousedev_mix->packet.buttons);
339 mousedev_notify_readers(mousedev, &mousedev_mix->packet);
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400340 mousedev_notify_readers(mousedev_mix,
341 &mousedev_mix->packet);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 clear_bit(0, &mousedev->packet.buttons);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400343 clear_bit(0, &mousedev_mix->packet.buttons);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 }
345 mousedev->touch = mousedev->pkt_count = 0;
346 mousedev->frac_dx = 0;
347 mousedev->frac_dy = 0;
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400348
349 } else if (!mousedev->touch)
350 mousedev->touch = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351}
352
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400353static void mousedev_event(struct input_handle *handle,
354 unsigned int type, unsigned int code, int value)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355{
356 struct mousedev *mousedev = handle->private;
357
358 switch (type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400360 case EV_ABS:
361 /* Ignore joysticks */
362 if (test_bit(BTN_TRIGGER, handle->dev->keybit))
363 return;
364
365 if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
366 mousedev_touchpad_event(handle->dev,
367 mousedev, code, value);
368 else
369 mousedev_abs_event(handle->dev, mousedev, code, value);
370
371 break;
372
373 case EV_REL:
374 mousedev_rel_event(mousedev, code, value);
375 break;
376
377 case EV_KEY:
378 if (value != 2) {
379 if (code == BTN_TOUCH &&
380 test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
381 mousedev_touchpad_touch(mousedev, value);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 else
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400383 mousedev_key_event(mousedev, code, value);
384 }
385 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400387 case EV_SYN:
388 if (code == SYN_REPORT) {
389 if (mousedev->touch) {
390 mousedev->pkt_count++;
391 /*
392 * Input system eats duplicate events,
393 * but we need all of them to do correct
394 * averaging so apply present one forward
395 */
396 fx(0) = fx(1);
397 fy(0) = fy(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400400 mousedev_notify_readers(mousedev, &mousedev->packet);
401 mousedev_notify_readers(mousedev_mix, &mousedev->packet);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400403 mousedev->packet.dx = mousedev->packet.dy =
404 mousedev->packet.dz = 0;
405 mousedev->packet.abs_event = 0;
406 }
407 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 }
409}
410
411static int mousedev_fasync(int fd, struct file *file, int on)
412{
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400413 struct mousedev_client *client = file->private_data;
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400414
Jonathan Corbet60aa4922009-02-01 14:52:56 -0700415 return fasync_helper(fd, file, on, &client->fasync);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416}
417
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400418static void mousedev_free(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419{
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400420 struct mousedev *mousedev = container_of(dev, struct mousedev, dev);
421
Dmitry Torokhova7097ff2008-04-01 00:22:53 -0400422 input_put_device(mousedev->handle.dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 kfree(mousedev);
424}
425
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400426static int mousedev_open_device(struct mousedev *mousedev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427{
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400428 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400430 retval = mutex_lock_interruptible(&mousedev->mutex);
431 if (retval)
432 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400434 if (mousedev->minor == MOUSEDEV_MIX)
435 mixdev_open_devices();
436 else if (!mousedev->exist)
437 retval = -ENODEV;
Oliver Neukum06445012007-10-12 14:18:40 -0400438 else if (!mousedev->open++) {
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400439 retval = input_open_device(&mousedev->handle);
Oliver Neukum06445012007-10-12 14:18:40 -0400440 if (retval)
441 mousedev->open--;
442 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400444 mutex_unlock(&mousedev->mutex);
445 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446}
447
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400448static void mousedev_close_device(struct mousedev *mousedev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449{
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400450 mutex_lock(&mousedev->mutex);
Dmitry Torokhovd542ed82007-04-12 01:30:15 -0400451
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400452 if (mousedev->minor == MOUSEDEV_MIX)
453 mixdev_close_devices();
454 else if (mousedev->exist && !--mousedev->open)
455 input_close_device(&mousedev->handle);
456
457 mutex_unlock(&mousedev->mutex);
Dmitry Torokhovd542ed82007-04-12 01:30:15 -0400458}
459
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400460/*
461 * Open all available devices so they can all be multiplexed in one.
462 * stream. Note that this function is called with mousedev_mix->mutex
463 * held.
464 */
Dmitry Torokhovd542ed82007-04-12 01:30:15 -0400465static void mixdev_open_devices(void)
466{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 struct mousedev *mousedev;
Dmitry Torokhovd542ed82007-04-12 01:30:15 -0400468
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400469 if (mousedev_mix->open++)
470 return;
471
Dmitry Torokhovd542ed82007-04-12 01:30:15 -0400472 list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) {
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400473 if (!mousedev->mixdev_open) {
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400474 if (mousedev_open_device(mousedev))
475 continue;
Dmitry Torokhovd542ed82007-04-12 01:30:15 -0400476
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400477 mousedev->mixdev_open = 1;
Dmitry Torokhovd542ed82007-04-12 01:30:15 -0400478 }
479 }
480}
481
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400482/*
483 * Close all devices that were opened as part of multiplexed
484 * device. Note that this function is called with mousedev_mix->mutex
485 * held.
486 */
Dmitry Torokhovd542ed82007-04-12 01:30:15 -0400487static void mixdev_close_devices(void)
488{
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400489 struct mousedev *mousedev;
Dmitry Torokhovd542ed82007-04-12 01:30:15 -0400490
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400491 if (--mousedev_mix->open)
492 return;
493
494 list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) {
Dmitry Torokhovd542ed82007-04-12 01:30:15 -0400495 if (mousedev->mixdev_open) {
496 mousedev->mixdev_open = 0;
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400497 mousedev_close_device(mousedev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 }
499 }
500}
501
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400502
503static void mousedev_attach_client(struct mousedev *mousedev,
504 struct mousedev_client *client)
505{
506 spin_lock(&mousedev->client_lock);
507 list_add_tail_rcu(&client->node, &mousedev->client_list);
508 spin_unlock(&mousedev->client_lock);
Dmitry Torokhov82ba56c2007-10-13 15:46:55 -0400509 synchronize_rcu();
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400510}
511
512static void mousedev_detach_client(struct mousedev *mousedev,
513 struct mousedev_client *client)
514{
515 spin_lock(&mousedev->client_lock);
516 list_del_rcu(&client->node);
517 spin_unlock(&mousedev->client_lock);
Dmitry Torokhov82ba56c2007-10-13 15:46:55 -0400518 synchronize_rcu();
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400519}
520
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400521static int mousedev_release(struct inode *inode, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522{
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400523 struct mousedev_client *client = file->private_data;
524 struct mousedev *mousedev = client->mousedev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400526 mousedev_detach_client(mousedev, client);
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400527 kfree(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400529 mousedev_close_device(mousedev);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400530 put_device(&mousedev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 return 0;
533}
534
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400535static int mousedev_open(struct inode *inode, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536{
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400537 struct mousedev_client *client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 struct mousedev *mousedev;
Dmitry Torokhovd542ed82007-04-12 01:30:15 -0400539 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 int i;
541
542#ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
543 if (imajor(inode) == MISC_MAJOR)
544 i = MOUSEDEV_MIX;
545 else
546#endif
547 i = iminor(inode) - MOUSEDEV_MINOR_BASE;
548
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400549 if (i >= MOUSEDEV_MINORS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 return -ENODEV;
551
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400552 error = mutex_lock_interruptible(&mousedev_table_mutex);
Arnd Bergmannf9c81542008-05-20 19:16:20 +0200553 if (error) {
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400554 return error;
Arnd Bergmannf9c81542008-05-20 19:16:20 +0200555 }
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400556 mousedev = mousedev_table[i];
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400557 if (mousedev)
558 get_device(&mousedev->dev);
559 mutex_unlock(&mousedev_table_mutex);
560
Arnd Bergmannf9c81542008-05-20 19:16:20 +0200561 if (!mousedev) {
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400562 return -ENODEV;
Arnd Bergmannf9c81542008-05-20 19:16:20 +0200563 }
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400564
565 client = kzalloc(sizeof(struct mousedev_client), GFP_KERNEL);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400566 if (!client) {
567 error = -ENOMEM;
568 goto err_put_mousedev;
569 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400571 spin_lock_init(&client->packet_lock);
572 client->pos_x = xres / 2;
573 client->pos_y = yres / 2;
574 client->mousedev = mousedev;
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400575 mousedev_attach_client(mousedev, client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400577 error = mousedev_open_device(mousedev);
578 if (error)
579 goto err_free_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400581 file->private_data = client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 return 0;
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400583
584 err_free_client:
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400585 mousedev_detach_client(mousedev, client);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400586 kfree(client);
587 err_put_mousedev:
588 put_device(&mousedev->dev);
589 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590}
591
592static inline int mousedev_limit_delta(int delta, int limit)
593{
594 return delta > limit ? limit : (delta < -limit ? -limit : delta);
595}
596
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400597static void mousedev_packet(struct mousedev_client *client,
598 signed char *ps2_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599{
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400600 struct mousedev_motion *p = &client->packets[client->tail];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400602 ps2_data[0] = 0x08 |
603 ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 ps2_data[1] = mousedev_limit_delta(p->dx, 127);
605 ps2_data[2] = mousedev_limit_delta(p->dy, 127);
606 p->dx -= ps2_data[1];
607 p->dy -= ps2_data[2];
608
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400609 switch (client->mode) {
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400610 case MOUSEDEV_EMUL_EXPS:
611 ps2_data[3] = mousedev_limit_delta(p->dz, 7);
612 p->dz -= ps2_data[3];
613 ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1);
614 client->bufsiz = 4;
615 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400617 case MOUSEDEV_EMUL_IMPS:
618 ps2_data[0] |=
619 ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
620 ps2_data[3] = mousedev_limit_delta(p->dz, 127);
621 p->dz -= ps2_data[3];
622 client->bufsiz = 4;
623 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400625 case MOUSEDEV_EMUL_PS2:
626 default:
627 ps2_data[0] |=
628 ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
629 p->dz = 0;
630 client->bufsiz = 3;
631 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 }
633
634 if (!p->dx && !p->dy && !p->dz) {
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400635 if (client->tail == client->head) {
636 client->ready = 0;
637 client->last_buttons = p->buttons;
Pavel Machekc1e4c8d2005-05-27 12:53:03 -0700638 } else
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400639 client->tail = (client->tail + 1) % PACKET_QUEUE_LEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641}
642
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400643static void mousedev_generate_response(struct mousedev_client *client,
644 int command)
645{
646 client->ps2[0] = 0xfa; /* ACK */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400648 switch (command) {
649
650 case 0xeb: /* Poll */
651 mousedev_packet(client, &client->ps2[1]);
652 client->bufsiz++; /* account for leading ACK */
653 break;
654
655 case 0xf2: /* Get ID */
656 switch (client->mode) {
657 case MOUSEDEV_EMUL_PS2:
658 client->ps2[1] = 0;
659 break;
660 case MOUSEDEV_EMUL_IMPS:
661 client->ps2[1] = 3;
662 break;
663 case MOUSEDEV_EMUL_EXPS:
664 client->ps2[1] = 4;
665 break;
666 }
667 client->bufsiz = 2;
668 break;
669
670 case 0xe9: /* Get info */
671 client->ps2[1] = 0x60; client->ps2[2] = 3; client->ps2[3] = 200;
672 client->bufsiz = 4;
673 break;
674
675 case 0xff: /* Reset */
676 client->impsseq = client->imexseq = 0;
677 client->mode = MOUSEDEV_EMUL_PS2;
678 client->ps2[1] = 0xaa; client->ps2[2] = 0x00;
679 client->bufsiz = 3;
680 break;
681
682 default:
683 client->bufsiz = 1;
684 break;
685 }
686 client->buffer = client->bufsiz;
687}
688
689static ssize_t mousedev_write(struct file *file, const char __user *buffer,
690 size_t count, loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691{
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400692 struct mousedev_client *client = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 unsigned char c;
694 unsigned int i;
695
696 for (i = 0; i < count; i++) {
697
698 if (get_user(c, buffer + i))
699 return -EFAULT;
700
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400701 spin_lock_irq(&client->packet_lock);
702
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400703 if (c == mousedev_imex_seq[client->imexseq]) {
704 if (++client->imexseq == MOUSEDEV_SEQ_LEN) {
705 client->imexseq = 0;
706 client->mode = MOUSEDEV_EMUL_EXPS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 }
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400708 } else
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400709 client->imexseq = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400711 if (c == mousedev_imps_seq[client->impsseq]) {
712 if (++client->impsseq == MOUSEDEV_SEQ_LEN) {
713 client->impsseq = 0;
714 client->mode = MOUSEDEV_EMUL_IMPS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 }
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400716 } else
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400717 client->impsseq = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400719 mousedev_generate_response(client, c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400721 spin_unlock_irq(&client->packet_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 }
723
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400724 kill_fasync(&client->fasync, SIGIO, POLL_IN);
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400725 wake_up_interruptible(&client->mousedev->wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726
727 return count;
728}
729
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400730static ssize_t mousedev_read(struct file *file, char __user *buffer,
731 size_t count, loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732{
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400733 struct mousedev_client *client = file->private_data;
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400734 struct mousedev *mousedev = client->mousedev;
735 signed char data[sizeof(client->ps2)];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 int retval = 0;
737
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400738 if (!client->ready && !client->buffer && mousedev->exist &&
739 (file->f_flags & O_NONBLOCK))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 return -EAGAIN;
741
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400742 retval = wait_event_interruptible(mousedev->wait,
743 !mousedev->exist || client->ready || client->buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 if (retval)
745 return retval;
746
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400747 if (!mousedev->exist)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 return -ENODEV;
749
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400750 spin_lock_irq(&client->packet_lock);
751
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400752 if (!client->buffer && client->ready) {
753 mousedev_packet(client, client->ps2);
754 client->buffer = client->bufsiz;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 }
756
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400757 if (count > client->buffer)
758 count = client->buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400760 memcpy(data, client->ps2 + client->bufsiz - client->buffer, count);
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400761 client->buffer -= count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400763 spin_unlock_irq(&client->packet_lock);
764
765 if (copy_to_user(buffer, data, count))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 return -EFAULT;
767
768 return count;
769}
770
771/* No kernel lock - fine */
772static unsigned int mousedev_poll(struct file *file, poll_table *wait)
773{
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400774 struct mousedev_client *client = file->private_data;
775 struct mousedev *mousedev = client->mousedev;
Julien Moutinho4d4bf992010-07-15 23:27:56 -0700776 unsigned int mask;
Dmitry Torokhov1e0afb22006-06-26 01:48:47 -0400777
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -0400778 poll_wait(file, &mousedev->wait, wait);
Julien Moutinho4d4bf992010-07-15 23:27:56 -0700779
780 mask = mousedev->exist ? POLLOUT | POLLWRNORM : POLLHUP | POLLERR;
781 if (client->ready || client->buffer)
782 mask |= POLLIN | POLLRDNORM;
783
784 return mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785}
786
Dmitry Torokhov66e66112006-09-14 01:31:59 -0400787static const struct file_operations mousedev_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788 .owner = THIS_MODULE,
789 .read = mousedev_read,
790 .write = mousedev_write,
791 .poll = mousedev_poll,
792 .open = mousedev_open,
793 .release = mousedev_release,
794 .fasync = mousedev_fasync,
795};
796
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400797static int mousedev_install_chrdev(struct mousedev *mousedev)
798{
799 mousedev_table[mousedev->minor] = mousedev;
800 return 0;
801}
802
803static void mousedev_remove_chrdev(struct mousedev *mousedev)
804{
805 mutex_lock(&mousedev_table_mutex);
806 mousedev_table[mousedev->minor] = NULL;
807 mutex_unlock(&mousedev_table_mutex);
808}
809
810/*
811 * Mark device non-existent. This disables writes, ioctls and
812 * prevents new users from opening the device. Already posted
813 * blocking reads will stay, however new ones will fail.
814 */
815static void mousedev_mark_dead(struct mousedev *mousedev)
816{
817 mutex_lock(&mousedev->mutex);
Dmitry Torokhov20da92d2010-07-15 23:27:36 -0700818 mousedev->exist = false;
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400819 mutex_unlock(&mousedev->mutex);
820}
821
822/*
823 * Wake up users waiting for IO so they can disconnect from
824 * dead device.
825 */
826static void mousedev_hangup(struct mousedev *mousedev)
827{
828 struct mousedev_client *client;
829
830 spin_lock(&mousedev->client_lock);
831 list_for_each_entry(client, &mousedev->client_list, node)
832 kill_fasync(&client->fasync, SIGIO, POLL_HUP);
833 spin_unlock(&mousedev->client_lock);
834
835 wake_up_interruptible(&mousedev->wait);
836}
837
838static void mousedev_cleanup(struct mousedev *mousedev)
839{
840 struct input_handle *handle = &mousedev->handle;
841
842 mousedev_mark_dead(mousedev);
843 mousedev_hangup(mousedev);
844 mousedev_remove_chrdev(mousedev);
845
846 /* mousedev is marked dead so no one else accesses mousedev->open */
847 if (mousedev->open)
848 input_close_device(handle);
849}
850
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400851static struct mousedev *mousedev_create(struct input_dev *dev,
852 struct input_handler *handler,
853 int minor)
854{
855 struct mousedev *mousedev;
856 int error;
857
858 mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL);
859 if (!mousedev) {
860 error = -ENOMEM;
861 goto err_out;
862 }
863
864 INIT_LIST_HEAD(&mousedev->client_list);
865 INIT_LIST_HEAD(&mousedev->mixdev_node);
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400866 spin_lock_init(&mousedev->client_lock);
867 mutex_init(&mousedev->mutex);
868 lockdep_set_subclass(&mousedev->mutex,
869 minor == MOUSEDEV_MIX ? MOUSEDEV_MIX : 0);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400870 init_waitqueue_head(&mousedev->wait);
871
872 if (minor == MOUSEDEV_MIX)
Thadeu Lima de Souza Cascardo3d5cb602009-05-09 16:08:04 -0700873 dev_set_name(&mousedev->dev, "mice");
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400874 else
Thadeu Lima de Souza Cascardo3d5cb602009-05-09 16:08:04 -0700875 dev_set_name(&mousedev->dev, "mouse%d", minor);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400876
877 mousedev->minor = minor;
Dmitry Torokhov20da92d2010-07-15 23:27:36 -0700878 mousedev->exist = true;
Dmitry Torokhova7097ff2008-04-01 00:22:53 -0400879 mousedev->handle.dev = input_get_device(dev);
Thadeu Lima de Souza Cascardo3d5cb602009-05-09 16:08:04 -0700880 mousedev->handle.name = dev_name(&mousedev->dev);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400881 mousedev->handle.handler = handler;
882 mousedev->handle.private = mousedev;
883
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400884 mousedev->dev.class = &input_class;
885 if (dev)
886 mousedev->dev.parent = &dev->dev;
887 mousedev->dev.devt = MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor);
888 mousedev->dev.release = mousedev_free;
889 device_initialize(&mousedev->dev);
890
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400891 if (minor != MOUSEDEV_MIX) {
892 error = input_register_handle(&mousedev->handle);
893 if (error)
894 goto err_free_mousedev;
895 }
896
897 error = mousedev_install_chrdev(mousedev);
898 if (error)
899 goto err_unregister_handle;
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400900
901 error = device_add(&mousedev->dev);
902 if (error)
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400903 goto err_cleanup_mousedev;
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400904
905 return mousedev;
906
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400907 err_cleanup_mousedev:
908 mousedev_cleanup(mousedev);
909 err_unregister_handle:
910 if (minor != MOUSEDEV_MIX)
911 input_unregister_handle(&mousedev->handle);
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400912 err_free_mousedev:
913 put_device(&mousedev->dev);
914 err_out:
915 return ERR_PTR(error);
916}
917
918static void mousedev_destroy(struct mousedev *mousedev)
919{
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400920 device_del(&mousedev->dev);
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400921 mousedev_cleanup(mousedev);
922 if (mousedev->minor != MOUSEDEV_MIX)
923 input_unregister_handle(&mousedev->handle);
924 put_device(&mousedev->dev);
925}
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400926
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400927static int mixdev_add_device(struct mousedev *mousedev)
928{
929 int retval;
930
931 retval = mutex_lock_interruptible(&mousedev_mix->mutex);
932 if (retval)
933 return retval;
934
935 if (mousedev_mix->open) {
936 retval = mousedev_open_device(mousedev);
937 if (retval)
938 goto out;
939
940 mousedev->mixdev_open = 1;
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400941 }
942
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400943 get_device(&mousedev->dev);
944 list_add_tail(&mousedev->mixdev_node, &mousedev_mix_list);
945
946 out:
947 mutex_unlock(&mousedev_mix->mutex);
948 return retval;
949}
950
951static void mixdev_remove_device(struct mousedev *mousedev)
952{
953 mutex_lock(&mousedev_mix->mutex);
954
955 if (mousedev->mixdev_open) {
956 mousedev->mixdev_open = 0;
957 mousedev_close_device(mousedev);
958 }
959
960 list_del_init(&mousedev->mixdev_node);
961 mutex_unlock(&mousedev_mix->mutex);
962
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400963 put_device(&mousedev->dev);
964}
965
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400966static int mousedev_connect(struct input_handler *handler,
967 struct input_dev *dev,
Dmitry Torokhov5b2a0822007-04-12 01:29:46 -0400968 const struct input_device_id *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969{
970 struct mousedev *mousedev;
Dmitry Torokhov5b2a0822007-04-12 01:29:46 -0400971 int minor;
972 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400974 for (minor = 0; minor < MOUSEDEV_MINORS; minor++)
975 if (!mousedev_table[minor])
976 break;
977
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 if (minor == MOUSEDEV_MINORS) {
979 printk(KERN_ERR "mousedev: no more free mousedev devices\n");
Dmitry Torokhov5b2a0822007-04-12 01:29:46 -0400980 return -ENFILE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 }
982
Dmitry Torokhov9657d752007-06-14 23:32:24 -0400983 mousedev = mousedev_create(dev, handler, minor);
984 if (IS_ERR(mousedev))
985 return PTR_ERR(mousedev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986
Dmitry Torokhovd542ed82007-04-12 01:30:15 -0400987 error = mixdev_add_device(mousedev);
Dmitry Torokhov464b2412007-08-30 00:22:24 -0400988 if (error) {
989 mousedev_destroy(mousedev);
990 return error;
991 }
Dmitry Torokhov5b2a0822007-04-12 01:29:46 -0400992
993 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994}
995
996static void mousedev_disconnect(struct input_handle *handle)
997{
998 struct mousedev *mousedev = handle->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999
Dmitry Torokhovd542ed82007-04-12 01:30:15 -04001000 mixdev_remove_device(mousedev);
Dmitry Torokhov9657d752007-06-14 23:32:24 -04001001 mousedev_destroy(mousedev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002}
1003
Dmitry Torokhov66e66112006-09-14 01:31:59 -04001004static const struct input_device_id mousedev_ids[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005 {
Dmitry Torokhov464b2412007-08-30 00:22:24 -04001006 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
1007 INPUT_DEVICE_ID_MATCH_KEYBIT |
1008 INPUT_DEVICE_ID_MATCH_RELBIT,
Jiri Slaby7b19ada2007-10-18 23:40:32 -07001009 .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) },
1010 .keybit = { [BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) },
1011 .relbit = { BIT_MASK(REL_X) | BIT_MASK(REL_Y) },
Dmitry Torokhov464b2412007-08-30 00:22:24 -04001012 }, /* A mouse like device, at least one button,
1013 two relative axes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014 {
Dmitry Torokhov464b2412007-08-30 00:22:24 -04001015 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
1016 INPUT_DEVICE_ID_MATCH_RELBIT,
Jiri Slaby7b19ada2007-10-18 23:40:32 -07001017 .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) },
1018 .relbit = { BIT_MASK(REL_WHEEL) },
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 }, /* A separate scrollwheel */
1020 {
Dmitry Torokhov464b2412007-08-30 00:22:24 -04001021 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
1022 INPUT_DEVICE_ID_MATCH_KEYBIT |
1023 INPUT_DEVICE_ID_MATCH_ABSBIT,
Jiri Slaby7b19ada2007-10-18 23:40:32 -07001024 .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) },
1025 .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) },
1026 .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) },
Dmitry Torokhov464b2412007-08-30 00:22:24 -04001027 }, /* A tablet like device, at least touch detection,
1028 two absolute axes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029 {
Dmitry Torokhov464b2412007-08-30 00:22:24 -04001030 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
1031 INPUT_DEVICE_ID_MATCH_KEYBIT |
1032 INPUT_DEVICE_ID_MATCH_ABSBIT,
Jiri Slaby7b19ada2007-10-18 23:40:32 -07001033 .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) },
1034 .keybit = { [BIT_WORD(BTN_TOOL_FINGER)] =
1035 BIT_MASK(BTN_TOOL_FINGER) },
1036 .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) |
1037 BIT_MASK(ABS_PRESSURE) |
1038 BIT_MASK(ABS_TOOL_WIDTH) },
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 }, /* A touchpad */
Micah Parrish6724f932008-01-17 12:01:04 -05001040 {
1041 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
1042 INPUT_DEVICE_ID_MATCH_KEYBIT |
1043 INPUT_DEVICE_ID_MATCH_ABSBIT,
Dmitry Torokhovd182c102008-01-30 16:33:40 -05001044 .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) },
Micah Parrish6724f932008-01-17 12:01:04 -05001045 .keybit = { [BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) },
1046 .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) },
1047 }, /* Mouse-like device with absolute X and Y but ordinary
1048 clicks, like hp ILO2 High Performance mouse */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049
Dmitry Torokhovd0ffb9b2007-04-12 01:30:00 -04001050 { }, /* Terminating entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051};
1052
1053MODULE_DEVICE_TABLE(input, mousedev_ids);
1054
1055static struct input_handler mousedev_handler = {
1056 .event = mousedev_event,
1057 .connect = mousedev_connect,
1058 .disconnect = mousedev_disconnect,
1059 .fops = &mousedev_fops,
1060 .minor = MOUSEDEV_MINOR_BASE,
1061 .name = "mousedev",
1062 .id_table = mousedev_ids,
1063};
1064
1065#ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
1066static struct miscdevice psaux_mouse = {
1067 PSMOUSE_MINOR, "psaux", &mousedev_fops
1068};
1069static int psaux_registered;
1070#endif
1071
1072static int __init mousedev_init(void)
1073{
Dmitry Torokhov4263cf02006-09-14 01:32:39 -04001074 int error;
1075
Dmitry Torokhov9657d752007-06-14 23:32:24 -04001076 mousedev_mix = mousedev_create(NULL, &mousedev_handler, MOUSEDEV_MIX);
1077 if (IS_ERR(mousedev_mix))
1078 return PTR_ERR(mousedev_mix);
1079
Dmitry Torokhov4263cf02006-09-14 01:32:39 -04001080 error = input_register_handler(&mousedev_handler);
Dmitry Torokhov9657d752007-06-14 23:32:24 -04001081 if (error) {
1082 mousedev_destroy(mousedev_mix);
Dmitry Torokhov4263cf02006-09-14 01:32:39 -04001083 return error;
Dmitry Torokhov4263cf02006-09-14 01:32:39 -04001084 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085
1086#ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
Dmitry Torokhov4263cf02006-09-14 01:32:39 -04001087 error = misc_register(&psaux_mouse);
1088 if (error)
1089 printk(KERN_WARNING "mice: could not register psaux device, "
1090 "error: %d\n", error);
1091 else
1092 psaux_registered = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093#endif
1094
1095 printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n");
1096
1097 return 0;
1098}
1099
1100static void __exit mousedev_exit(void)
1101{
1102#ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
1103 if (psaux_registered)
1104 misc_deregister(&psaux_mouse);
1105#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 input_unregister_handler(&mousedev_handler);
Dmitry Torokhov9657d752007-06-14 23:32:24 -04001107 mousedev_destroy(mousedev_mix);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108}
1109
1110module_init(mousedev_init);
1111module_exit(mousedev_exit);