2 * Copyright (c) 1999-2001 Vojtech Pavlik
6 * Serial mouse driver for Linux
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 * Should you need to contact me, the author, you can do so either by
25 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
26 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
29 #include <linux/delay.h>
30 #include <linux/module.h>
31 #include <linux/slab.h>
32 #include <linux/interrupt.h>
33 #include <linux/input.h>
34 #include <linux/serio.h>
35 #include <linux/init.h>
37 #define DRIVER_DESC "Serial mouse driver"
39 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
40 MODULE_DESCRIPTION(DRIVER_DESC);
41 MODULE_LICENSE("GPL");
43 static const char *sermouse_protocols[] = { "None", "Mouse Systems Mouse", "Sun Mouse", "Microsoft Mouse",
44 "Logitech M+ Mouse", "Microsoft MZ Mouse", "Logitech MZ+ Mouse",
45 "Logitech MZ++ Mouse"};
48 struct input_dev *dev;
57 * sermouse_process_msc() analyzes the incoming MSC/Sun bytestream and
58 * applies some prediction to the data, resulting in 96 updates per
59 * second, which is as good as a PS/2 or USB mouse.
62 static void sermouse_process_msc(struct sermouse *sermouse, signed char data)
64 struct input_dev *dev = sermouse->dev;
65 signed char *buf = sermouse->buf;
67 switch (sermouse->count) {
70 if ((data & 0xf8) != 0x80)
72 input_report_key(dev, BTN_LEFT, !(data & 4));
73 input_report_key(dev, BTN_RIGHT, !(data & 1));
74 input_report_key(dev, BTN_MIDDLE, !(data & 2));
79 input_report_rel(dev, REL_X, data / 2);
80 input_report_rel(dev, REL_Y, -buf[1]);
81 buf[0] = data - data / 2;
86 input_report_rel(dev, REL_X, buf[0]);
87 input_report_rel(dev, REL_Y, buf[1] - data);
94 if (++sermouse->count == 5)
99 * sermouse_process_ms() anlyzes the incoming MS(Z/+/++) bytestream and
100 * generates events. With prediction it gets 80 updates/sec, assuming
101 * standard 3-byte packets and 1200 bps.
104 static void sermouse_process_ms(struct sermouse *sermouse, signed char data)
106 struct input_dev *dev = sermouse->dev;
107 signed char *buf = sermouse->buf;
111 else if (sermouse->count == 0)
114 switch (sermouse->count) {
118 input_report_key(dev, BTN_LEFT, (data >> 5) & 1);
119 input_report_key(dev, BTN_RIGHT, (data >> 4) & 1);
124 data = (signed char) (((buf[1] << 6) & 0xc0) | (data & 0x3f));
125 input_report_rel(dev, REL_X, data / 2);
126 input_report_rel(dev, REL_Y, buf[4]);
127 buf[3] = data - data / 2;
131 /* Guessing the state of the middle button on 3-button MS-protocol mice - ugly. */
132 if ((sermouse->type == SERIO_MS) && !data && !buf[2] && !((buf[0] & 0xf0) ^ buf[1]))
133 input_report_key(dev, BTN_MIDDLE, !test_bit(BTN_MIDDLE, dev->key));
136 data = (signed char) (((buf[1] << 4) & 0xc0) | (data & 0x3f));
137 input_report_rel(dev, REL_X, buf[3]);
138 input_report_rel(dev, REL_Y, data - buf[4]);
144 switch (sermouse->type) {
147 sermouse->type = SERIO_MP;
150 if ((data >> 2) & 3) break; /* M++ Wireless Extension packet. */
151 input_report_key(dev, BTN_MIDDLE, (data >> 5) & 1);
152 input_report_key(dev, BTN_SIDE, (data >> 4) & 1);
157 input_report_key(dev, BTN_SIDE, (data >> 5) & 1);
160 input_report_key(dev, BTN_MIDDLE, (data >> 4) & 1);
161 input_report_rel(dev, REL_WHEEL, (data & 8) - (data & 7));
168 case 6: /* MZ++ packet type. We can get these bytes for M++ too but we ignore them later. */
169 buf[1] = (data >> 2) & 0x0f;
173 case 7: /* Ignore anything besides MZ++ */
174 if (sermouse->type != SERIO_MZPP)
179 case 1: /* Extra mouse info */
181 input_report_key(dev, BTN_SIDE, (data >> 4) & 1);
182 input_report_key(dev, BTN_EXTRA, (data >> 5) & 1);
183 input_report_rel(dev, data & 0x80 ? REL_HWHEEL : REL_WHEEL, (data & 7) - (data & 8));
187 default: /* We don't decode anything else yet. */
190 "sermouse.c: Received MZ++ packet %x, don't know how to handle.\n", buf[1]);
203 * sermouse_interrupt() handles incoming characters, either gathering them into
204 * packets or passing them to the command routine as command output.
207 static irqreturn_t sermouse_interrupt(struct serio *serio,
208 unsigned char data, unsigned int flags)
210 struct sermouse *sermouse = serio_get_drvdata(serio);
212 if (time_after(jiffies, sermouse->last + HZ/10))
215 sermouse->last = jiffies;
217 if (sermouse->type > SERIO_SUN)
218 sermouse_process_ms(sermouse, data);
220 sermouse_process_msc(sermouse, data);
226 * sermouse_disconnect() cleans up after we don't want talk
227 * to the mouse anymore.
230 static void sermouse_disconnect(struct serio *serio)
232 struct sermouse *sermouse = serio_get_drvdata(serio);
235 serio_set_drvdata(serio, NULL);
236 input_unregister_device(sermouse->dev);
241 * sermouse_connect() is a callback form the serio module when
242 * an unhandled serio port is found.
245 static int sermouse_connect(struct serio *serio, struct serio_driver *drv)
247 struct sermouse *sermouse;
248 struct input_dev *input_dev;
249 unsigned char c = serio->id.extra;
252 sermouse = kzalloc(sizeof(struct sermouse), GFP_KERNEL);
253 input_dev = input_allocate_device();
254 if (!sermouse || !input_dev)
257 sermouse->dev = input_dev;
258 snprintf(sermouse->phys, sizeof(sermouse->phys), "%s/input0", serio->phys);
259 sermouse->type = serio->id.proto;
261 input_dev->name = sermouse_protocols[sermouse->type];
262 input_dev->phys = sermouse->phys;
263 input_dev->id.bustype = BUS_RS232;
264 input_dev->id.vendor = sermouse->type;
265 input_dev->id.product = c;
266 input_dev->id.version = 0x0100;
267 input_dev->dev.parent = &serio->dev;
269 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
270 input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
272 input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
274 if (c & 0x01) set_bit(BTN_MIDDLE, input_dev->keybit);
275 if (c & 0x02) set_bit(BTN_SIDE, input_dev->keybit);
276 if (c & 0x04) set_bit(BTN_EXTRA, input_dev->keybit);
277 if (c & 0x10) set_bit(REL_WHEEL, input_dev->relbit);
278 if (c & 0x20) set_bit(REL_HWHEEL, input_dev->relbit);
280 serio_set_drvdata(serio, sermouse);
282 err = serio_open(serio, drv);
286 err = input_register_device(sermouse->dev);
292 fail3: serio_close(serio);
293 fail2: serio_set_drvdata(serio, NULL);
294 fail1: input_free_device(input_dev);
299 static struct serio_device_id sermouse_serio_ids[] = {
345 MODULE_DEVICE_TABLE(serio, sermouse_serio_ids);
347 static struct serio_driver sermouse_drv = {
351 .description = DRIVER_DESC,
352 .id_table = sermouse_serio_ids,
353 .interrupt = sermouse_interrupt,
354 .connect = sermouse_connect,
355 .disconnect = sermouse_disconnect,
358 static int __init sermouse_init(void)
360 return serio_register_driver(&sermouse_drv);
363 static void __exit sermouse_exit(void)
365 serio_unregister_driver(&sermouse_drv);
368 module_init(sermouse_init);
369 module_exit(sermouse_exit);