2 * $Id: sermouse.c,v 1.17 2002/03/13 10:03:43 vojtech Exp $
4 * Copyright (c) 1999-2001 Vojtech Pavlik
8 * Serial mouse driver for Linux
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 * Should you need to contact me, the author, you can do so either by
27 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
28 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
31 #include <linux/delay.h>
32 #include <linux/module.h>
33 #include <linux/slab.h>
34 #include <linux/interrupt.h>
35 #include <linux/input.h>
36 #include <linux/serio.h>
37 #include <linux/init.h>
39 #define DRIVER_DESC "Serial mouse driver"
41 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
42 MODULE_DESCRIPTION(DRIVER_DESC);
43 MODULE_LICENSE("GPL");
45 static char *sermouse_protocols[] = { "None", "Mouse Systems Mouse", "Sun Mouse", "Microsoft Mouse",
46 "Logitech M+ Mouse", "Microsoft MZ Mouse", "Logitech MZ+ Mouse",
47 "Logitech MZ++ Mouse"};
50 struct input_dev *dev;
59 * sermouse_process_msc() analyzes the incoming MSC/Sun bytestream and
60 * applies some prediction to the data, resulting in 96 updates per
61 * second, which is as good as a PS/2 or USB mouse.
64 static void sermouse_process_msc(struct sermouse *sermouse, signed char data, struct pt_regs *regs)
66 struct input_dev *dev = sermouse->dev;
67 signed char *buf = sermouse->buf;
69 input_regs(dev, regs);
71 switch (sermouse->count) {
74 if ((data & 0xf8) != 0x80) return;
75 input_report_key(dev, BTN_LEFT, !(data & 4));
76 input_report_key(dev, BTN_RIGHT, !(data & 1));
77 input_report_key(dev, BTN_MIDDLE, !(data & 2));
82 input_report_rel(dev, REL_X, data / 2);
83 input_report_rel(dev, REL_Y, -buf[1]);
84 buf[0] = data - data / 2;
89 input_report_rel(dev, REL_X, buf[0]);
90 input_report_rel(dev, REL_Y, buf[1] - data);
97 if (++sermouse->count == 5)
102 * sermouse_process_ms() anlyzes the incoming MS(Z/+/++) bytestream and
103 * generates events. With prediction it gets 80 updates/sec, assuming
104 * standard 3-byte packets and 1200 bps.
107 static void sermouse_process_ms(struct sermouse *sermouse, signed char data, struct pt_regs *regs)
109 struct input_dev *dev = sermouse->dev;
110 signed char *buf = sermouse->buf;
112 if (data & 0x40) sermouse->count = 0;
114 input_regs(dev, regs);
116 switch (sermouse->count) {
120 input_report_key(dev, BTN_LEFT, (data >> 5) & 1);
121 input_report_key(dev, BTN_RIGHT, (data >> 4) & 1);
126 data = (signed char) (((buf[1] << 6) & 0xc0) | (data & 0x3f));
127 input_report_rel(dev, REL_X, data / 2);
128 input_report_rel(dev, REL_Y, buf[4]);
129 buf[3] = data - data / 2;
133 /* Guessing the state of the middle button on 3-button MS-protocol mice - ugly. */
134 if ((sermouse->type == SERIO_MS) && !data && !buf[2] && !((buf[0] & 0xf0) ^ buf[1]))
135 input_report_key(dev, BTN_MIDDLE, !test_bit(BTN_MIDDLE, dev->key));
138 data = (signed char) (((buf[1] << 4) & 0xc0) | (data & 0x3f));
139 input_report_rel(dev, REL_X, buf[3]);
140 input_report_rel(dev, REL_Y, data - buf[4]);
146 switch (sermouse->type) {
149 sermouse->type = SERIO_MP;
152 if ((data >> 2) & 3) break; /* M++ Wireless Extension packet. */
153 input_report_key(dev, BTN_MIDDLE, (data >> 5) & 1);
154 input_report_key(dev, BTN_SIDE, (data >> 4) & 1);
159 input_report_key(dev, BTN_SIDE, (data >> 5) & 1);
162 input_report_key(dev, BTN_MIDDLE, (data >> 4) & 1);
163 input_report_rel(dev, REL_WHEEL, (data & 8) - (data & 7));
170 case 6: /* MZ++ packet type. We can get these bytes for M++ too but we ignore them later. */
171 buf[1] = (data >> 2) & 0x0f;
175 case 7: /* Ignore anything besides MZ++ */
176 if (sermouse->type != SERIO_MZPP) break;
180 case 1: /* Extra mouse info */
182 input_report_key(dev, BTN_SIDE, (data >> 4) & 1);
183 input_report_key(dev, BTN_EXTRA, (data >> 5) & 1);
184 input_report_rel(dev, data & 0x80 ? REL_HWHEEL : REL_WHEEL, (data & 7) - (data & 8));
188 default: /* We don't decode anything else yet. */
191 "sermouse.c: Received MZ++ packet %x, don't know how to handle.\n", buf[1]);
204 * sermouse_interrupt() handles incoming characters, either gathering them into
205 * packets or passing them to the command routine as command output.
208 static irqreturn_t sermouse_interrupt(struct serio *serio,
209 unsigned char data, unsigned int flags, struct pt_regs *regs)
211 struct sermouse *sermouse = serio_get_drvdata(serio);
213 if (time_after(jiffies, sermouse->last + HZ/10)) sermouse->count = 0;
214 sermouse->last = jiffies;
216 if (sermouse->type > SERIO_SUN)
217 sermouse_process_ms(sermouse, data, regs);
219 sermouse_process_msc(sermouse, data, regs);
224 * sermouse_disconnect() cleans up after we don't want talk
225 * to the mouse anymore.
228 static void sermouse_disconnect(struct serio *serio)
230 struct sermouse *sermouse = serio_get_drvdata(serio);
233 serio_set_drvdata(serio, NULL);
234 input_unregister_device(sermouse->dev);
239 * sermouse_connect() is a callback form the serio module when
240 * an unhandled serio port is found.
243 static int sermouse_connect(struct serio *serio, struct serio_driver *drv)
245 struct sermouse *sermouse;
246 struct input_dev *input_dev;
247 unsigned char c = serio->id.extra;
250 sermouse = kzalloc(sizeof(struct sermouse), GFP_KERNEL);
251 input_dev = input_allocate_device();
252 if (!sermouse || !input_dev)
255 sermouse->dev = input_dev;
256 snprintf(sermouse->phys, sizeof(sermouse->phys), "%s/input0", serio->phys);
257 sermouse->type = serio->id.proto;
259 input_dev->name = sermouse_protocols[sermouse->type];
260 input_dev->phys = sermouse->phys;
261 input_dev->id.bustype = BUS_RS232;
262 input_dev->id.vendor = sermouse->type;
263 input_dev->id.product = c;
264 input_dev->id.version = 0x0100;
265 input_dev->cdev.dev = &serio->dev;
267 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
268 input_dev->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_RIGHT);
269 input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
270 input_dev->private = sermouse;
272 if (c & 0x01) set_bit(BTN_MIDDLE, input_dev->keybit);
273 if (c & 0x02) set_bit(BTN_SIDE, input_dev->keybit);
274 if (c & 0x04) set_bit(BTN_EXTRA, input_dev->keybit);
275 if (c & 0x10) set_bit(REL_WHEEL, input_dev->relbit);
276 if (c & 0x20) set_bit(REL_HWHEEL, input_dev->relbit);
278 serio_set_drvdata(serio, sermouse);
280 err = serio_open(serio, drv);
284 input_register_device(sermouse->dev);
288 fail: serio_set_drvdata(serio, NULL);
289 input_free_device(input_dev);
294 static struct serio_device_id sermouse_serio_ids[] = {
340 MODULE_DEVICE_TABLE(serio, sermouse_serio_ids);
342 static struct serio_driver sermouse_drv = {
346 .description = DRIVER_DESC,
347 .id_table = sermouse_serio_ids,
348 .interrupt = sermouse_interrupt,
349 .connect = sermouse_connect,
350 .disconnect = sermouse_disconnect,
353 static int __init sermouse_init(void)
355 serio_register_driver(&sermouse_drv);
359 static void __exit sermouse_exit(void)
361 serio_unregister_driver(&sermouse_drv);
364 module_init(sermouse_init);
365 module_exit(sermouse_exit);