PageRenderTime 67ms CodeModel.GetById 16ms app.highlight 46ms RepoModel.GetById 2ms app.codeStats 0ms

/drivers/input/mouse/sermouse.c

https://bitbucket.org/evzijst/gittest
C | 370 lines | 249 code | 71 blank | 50 comment | 29 complexity | b9752377a5923540b22f91ba281553b1 MD5 | raw file
  1/*
  2 * $Id: sermouse.c,v 1.17 2002/03/13 10:03:43 vojtech Exp $
  3 *
  4 *  Copyright (c) 1999-2001 Vojtech Pavlik
  5 */
  6
  7/*
  8 *  Serial mouse driver for Linux
  9 */
 10
 11/*
 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.
 16 *
 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.
 21 *
 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
 25 *
 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
 29 */
 30
 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/config.h>
 37#include <linux/serio.h>
 38#include <linux/init.h>
 39
 40#define DRIVER_DESC	"Serial mouse driver"
 41
 42MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 43MODULE_DESCRIPTION(DRIVER_DESC);
 44MODULE_LICENSE("GPL");
 45
 46static char *sermouse_protocols[] = { "None", "Mouse Systems Mouse", "Sun Mouse", "Microsoft Mouse",
 47					"Logitech M+ Mouse", "Microsoft MZ Mouse", "Logitech MZ+ Mouse",
 48					"Logitech MZ++ Mouse"};
 49
 50struct sermouse {
 51	struct input_dev dev;
 52	signed char buf[8];
 53	unsigned char count;
 54	unsigned char type;
 55	unsigned long last;
 56	char phys[32];
 57};
 58
 59/*
 60 * sermouse_process_msc() analyzes the incoming MSC/Sun bytestream and
 61 * applies some prediction to the data, resulting in 96 updates per
 62 * second, which is as good as a PS/2 or USB mouse.
 63 */
 64
 65static void sermouse_process_msc(struct sermouse *sermouse, signed char data, struct pt_regs *regs)
 66{
 67	struct input_dev *dev = &sermouse->dev;
 68	signed char *buf = sermouse->buf;
 69
 70	input_regs(dev, regs);
 71
 72	switch (sermouse->count) {
 73
 74		case 0:
 75			if ((data & 0xf8) != 0x80) return;
 76			input_report_key(dev, BTN_LEFT,   !(data & 4));
 77			input_report_key(dev, BTN_RIGHT,  !(data & 1));
 78			input_report_key(dev, BTN_MIDDLE, !(data & 2));
 79			break;
 80
 81		case 1:
 82		case 3:
 83			input_report_rel(dev, REL_X, data / 2);
 84			input_report_rel(dev, REL_Y, -buf[1]);
 85			buf[0] = data - data / 2;
 86			break;
 87
 88		case 2:
 89		case 4:
 90			input_report_rel(dev, REL_X, buf[0]);
 91			input_report_rel(dev, REL_Y, buf[1] - data);
 92			buf[1] = data / 2;
 93			break;
 94	}
 95
 96	input_sync(dev);
 97
 98	if (++sermouse->count == (5 - ((sermouse->type == SERIO_SUN) << 1)))
 99		sermouse->count = 0;
100}
101
102/*
103 * sermouse_process_ms() anlyzes the incoming MS(Z/+/++) bytestream and
104 * generates events. With prediction it gets 80 updates/sec, assuming
105 * standard 3-byte packets and 1200 bps.
106 */
107
108static void sermouse_process_ms(struct sermouse *sermouse, signed char data, struct pt_regs *regs)
109{
110	struct input_dev *dev = &sermouse->dev;
111	signed char *buf = sermouse->buf;
112
113	if (data & 0x40) sermouse->count = 0;
114
115	input_regs(dev, regs);
116
117	switch (sermouse->count) {
118
119		case 0:
120			buf[1] = data;
121			input_report_key(dev, BTN_LEFT,   (data >> 5) & 1);
122			input_report_key(dev, BTN_RIGHT,  (data >> 4) & 1);
123			break;
124
125		case 1:
126			buf[2] = data;
127			data = (signed char) (((buf[1] << 6) & 0xc0) | (data & 0x3f));
128			input_report_rel(dev, REL_X, data / 2);
129			input_report_rel(dev, REL_Y, buf[4]);
130			buf[3] = data - data / 2;
131			break;
132
133		case 2:
134			/* Guessing the state of the middle button on 3-button MS-protocol mice - ugly. */
135			if ((sermouse->type == SERIO_MS) && !data && !buf[2] && !((buf[0] & 0xf0) ^ buf[1]))
136				input_report_key(dev, BTN_MIDDLE, !test_bit(BTN_MIDDLE, dev->key));
137			buf[0] = buf[1];
138
139			data = (signed char) (((buf[1] << 4) & 0xc0) | (data & 0x3f));
140			input_report_rel(dev, REL_X, buf[3]);
141			input_report_rel(dev, REL_Y, data - buf[4]);
142			buf[4] = data / 2;
143			break;
144
145		case 3:
146
147			switch (sermouse->type) {
148
149				case SERIO_MS:
150					 sermouse->type = SERIO_MP;
151
152				case SERIO_MP:
153					if ((data >> 2) & 3) break;	/* M++ Wireless Extension packet. */
154					input_report_key(dev, BTN_MIDDLE, (data >> 5) & 1);
155					input_report_key(dev, BTN_SIDE,   (data >> 4) & 1);
156					break;
157
158				case SERIO_MZP:
159				case SERIO_MZPP:
160					input_report_key(dev, BTN_SIDE,   (data >> 5) & 1);
161
162				case SERIO_MZ:
163					input_report_key(dev, BTN_MIDDLE, (data >> 4) & 1);
164					input_report_rel(dev, REL_WHEEL,  (data & 8) - (data & 7));
165					break;
166			}
167
168			break;
169
170		case 4:
171		case 6:	/* MZ++ packet type. We can get these bytes for M++ too but we ignore them later. */
172			buf[1] = (data >> 2) & 0x0f;
173			break;
174
175		case 5:
176		case 7: /* Ignore anything besides MZ++ */
177			if (sermouse->type != SERIO_MZPP) break;
178
179			switch (buf[1]) {
180
181				case 1: /* Extra mouse info */
182
183					input_report_key(dev, BTN_SIDE, (data >> 4) & 1);
184					input_report_key(dev, BTN_EXTRA, (data >> 5) & 1);
185					input_report_rel(dev, data & 0x80 ? REL_HWHEEL : REL_WHEEL, (data & 7) - (data & 8));
186
187					break;
188
189				default: /* We don't decode anything else yet. */
190
191					printk(KERN_WARNING
192						"sermouse.c: Received MZ++ packet %x, don't know how to handle.\n", buf[1]);
193					break;
194			}
195
196			break;
197	}
198
199	input_sync(dev);
200
201	sermouse->count++;
202}
203
204/*
205 * sermouse_interrupt() handles incoming characters, either gathering them into
206 * packets or passing them to the command routine as command output.
207 */
208
209static irqreturn_t sermouse_interrupt(struct serio *serio,
210		unsigned char data, unsigned int flags, struct pt_regs *regs)
211{
212	struct sermouse *sermouse = serio_get_drvdata(serio);
213
214	if (time_after(jiffies, sermouse->last + HZ/10)) sermouse->count = 0;
215	sermouse->last = jiffies;
216
217	if (sermouse->type > SERIO_SUN)
218		sermouse_process_ms(sermouse, data, regs);
219	else
220		sermouse_process_msc(sermouse, data, regs);
221	return IRQ_HANDLED;
222}
223
224/*
225 * sermouse_disconnect() cleans up after we don't want talk
226 * to the mouse anymore.
227 */
228
229static void sermouse_disconnect(struct serio *serio)
230{
231	struct sermouse *sermouse = serio_get_drvdata(serio);
232
233	input_unregister_device(&sermouse->dev);
234	serio_close(serio);
235	serio_set_drvdata(serio, NULL);
236	kfree(sermouse);
237}
238
239/*
240 * sermouse_connect() is a callback form the serio module when
241 * an unhandled serio port is found.
242 */
243
244static int sermouse_connect(struct serio *serio, struct serio_driver *drv)
245{
246	struct sermouse *sermouse;
247	unsigned char c;
248	int err;
249
250	if (!serio->id.proto || serio->id.proto > SERIO_MZPP)
251		return -ENODEV;
252
253	if (!(sermouse = kmalloc(sizeof(struct sermouse), GFP_KERNEL)))
254		return -ENOMEM;
255
256	memset(sermouse, 0, sizeof(struct sermouse));
257
258	init_input_dev(&sermouse->dev);
259	sermouse->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
260	sermouse->dev.keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_RIGHT);
261	sermouse->dev.relbit[0] = BIT(REL_X) | BIT(REL_Y);
262	sermouse->dev.private = sermouse;
263
264	sermouse->type = serio->id.proto;
265	c = serio->id.extra;
266
267	if (c & 0x01) set_bit(BTN_MIDDLE, sermouse->dev.keybit);
268	if (c & 0x02) set_bit(BTN_SIDE, sermouse->dev.keybit);
269	if (c & 0x04) set_bit(BTN_EXTRA, sermouse->dev.keybit);
270	if (c & 0x10) set_bit(REL_WHEEL, sermouse->dev.relbit);
271	if (c & 0x20) set_bit(REL_HWHEEL, sermouse->dev.relbit);
272
273	sprintf(sermouse->phys, "%s/input0", serio->phys);
274
275	sermouse->dev.name = sermouse_protocols[sermouse->type];
276	sermouse->dev.phys = sermouse->phys;
277	sermouse->dev.id.bustype = BUS_RS232;
278	sermouse->dev.id.vendor = sermouse->type;
279	sermouse->dev.id.product = c;
280	sermouse->dev.id.version = 0x0100;
281	sermouse->dev.dev = &serio->dev;
282
283	serio_set_drvdata(serio, sermouse);
284
285	err = serio_open(serio, drv);
286	if (err) {
287		serio_set_drvdata(serio, NULL);
288		kfree(sermouse);
289		return err;
290	}
291
292	input_register_device(&sermouse->dev);
293
294	printk(KERN_INFO "input: %s on %s\n", sermouse_protocols[sermouse->type], serio->phys);
295
296	return 0;
297}
298
299static struct serio_device_id sermouse_serio_ids[] = {
300	{
301		.type	= SERIO_RS232,
302		.proto	= SERIO_MSC,
303		.id	= SERIO_ANY,
304		.extra	= SERIO_ANY,
305	},
306	{
307		.type	= SERIO_RS232,
308		.proto	= SERIO_SUN,
309		.id	= SERIO_ANY,
310		.extra	= SERIO_ANY,
311	},
312	{
313		.type	= SERIO_RS232,
314		.proto	= SERIO_MS,
315		.id	= SERIO_ANY,
316		.extra	= SERIO_ANY,
317	},
318	{
319		.type	= SERIO_RS232,
320		.proto	= SERIO_MP,
321		.id	= SERIO_ANY,
322		.extra	= SERIO_ANY,
323	},
324	{
325		.type	= SERIO_RS232,
326		.proto	= SERIO_MZ,
327		.id	= SERIO_ANY,
328		.extra	= SERIO_ANY,
329	},
330	{
331		.type	= SERIO_RS232,
332		.proto	= SERIO_MZP,
333		.id	= SERIO_ANY,
334		.extra	= SERIO_ANY,
335	},
336	{
337		.type	= SERIO_RS232,
338		.proto	= SERIO_MZPP,
339		.id	= SERIO_ANY,
340		.extra	= SERIO_ANY,
341	},
342	{ 0 }
343};
344
345MODULE_DEVICE_TABLE(serio, sermouse_serio_ids);
346
347static struct serio_driver sermouse_drv = {
348	.driver		= {
349		.name	= "sermouse",
350	},
351	.description	= DRIVER_DESC,
352	.id_table	= sermouse_serio_ids,
353	.interrupt	= sermouse_interrupt,
354	.connect	= sermouse_connect,
355	.disconnect	= sermouse_disconnect,
356};
357
358static int __init sermouse_init(void)
359{
360	serio_register_driver(&sermouse_drv);
361	return 0;
362}
363
364static void __exit sermouse_exit(void)
365{
366	serio_unregister_driver(&sermouse_drv);
367}
368
369module_init(sermouse_init);
370module_exit(sermouse_exit);