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1da177e4 LT |
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 | ||
42 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
43 | MODULE_DESCRIPTION(DRIVER_DESC); | |
44 | MODULE_LICENSE("GPL"); | |
45 | ||
46 | static 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 | ||
50 | struct sermouse { | |
2e5b636b | 51 | struct input_dev *dev; |
1da177e4 LT |
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 | ||
65 | static void sermouse_process_msc(struct sermouse *sermouse, signed char data, struct pt_regs *regs) | |
66 | { | |
2e5b636b | 67 | struct input_dev *dev = sermouse->dev; |
1da177e4 LT |
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 | ||
68ca243d | 98 | if (++sermouse->count == 5) |
1da177e4 LT |
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 | ||
108 | static void sermouse_process_ms(struct sermouse *sermouse, signed char data, struct pt_regs *regs) | |
109 | { | |
2e5b636b | 110 | struct input_dev *dev = sermouse->dev; |
1da177e4 LT |
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 | ||
209 | static 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 | ||
229 | static void sermouse_disconnect(struct serio *serio) | |
230 | { | |
231 | struct sermouse *sermouse = serio_get_drvdata(serio); | |
232 | ||
1da177e4 LT |
233 | serio_close(serio); |
234 | serio_set_drvdata(serio, NULL); | |
2e5b636b | 235 | input_unregister_device(sermouse->dev); |
1da177e4 LT |
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 | ||
244 | static int sermouse_connect(struct serio *serio, struct serio_driver *drv) | |
245 | { | |
246 | struct sermouse *sermouse; | |
2e5b636b DT |
247 | struct input_dev *input_dev; |
248 | unsigned char c = serio->id.extra; | |
249 | int err = -ENOMEM; | |
1da177e4 | 250 | |
2e5b636b DT |
251 | sermouse = kzalloc(sizeof(struct sermouse), GFP_KERNEL); |
252 | input_dev = input_allocate_device(); | |
253 | if (!sermouse || !input_dev) | |
254 | goto fail; | |
1da177e4 | 255 | |
2e5b636b | 256 | sermouse->dev = input_dev; |
1da177e4 | 257 | sprintf(sermouse->phys, "%s/input0", serio->phys); |
2e5b636b | 258 | sermouse->type = serio->id.proto; |
1da177e4 | 259 | |
2e5b636b DT |
260 | input_dev->name = sermouse_protocols[sermouse->type]; |
261 | input_dev->phys = sermouse->phys; | |
262 | input_dev->id.bustype = BUS_RS232; | |
263 | input_dev->id.vendor = sermouse->type; | |
264 | input_dev->id.product = c; | |
265 | input_dev->id.version = 0x0100; | |
266 | input_dev->cdev.dev = &serio->dev; | |
267 | ||
268 | input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL); | |
269 | input_dev->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_RIGHT); | |
270 | input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y); | |
271 | input_dev->private = sermouse; | |
272 | ||
273 | if (c & 0x01) set_bit(BTN_MIDDLE, input_dev->keybit); | |
274 | if (c & 0x02) set_bit(BTN_SIDE, input_dev->keybit); | |
275 | if (c & 0x04) set_bit(BTN_EXTRA, input_dev->keybit); | |
276 | if (c & 0x10) set_bit(REL_WHEEL, input_dev->relbit); | |
277 | if (c & 0x20) set_bit(REL_HWHEEL, input_dev->relbit); | |
1da177e4 LT |
278 | |
279 | serio_set_drvdata(serio, sermouse); | |
280 | ||
281 | err = serio_open(serio, drv); | |
2e5b636b DT |
282 | if (err) |
283 | goto fail; | |
1da177e4 | 284 | |
2e5b636b | 285 | input_register_device(sermouse->dev); |
1da177e4 LT |
286 | |
287 | return 0; | |
2e5b636b DT |
288 | |
289 | fail: serio_set_drvdata(serio, NULL); | |
290 | input_free_device(input_dev); | |
291 | kfree(sermouse); | |
292 | return err; | |
1da177e4 LT |
293 | } |
294 | ||
295 | static struct serio_device_id sermouse_serio_ids[] = { | |
296 | { | |
297 | .type = SERIO_RS232, | |
298 | .proto = SERIO_MSC, | |
299 | .id = SERIO_ANY, | |
300 | .extra = SERIO_ANY, | |
301 | }, | |
302 | { | |
303 | .type = SERIO_RS232, | |
304 | .proto = SERIO_SUN, | |
305 | .id = SERIO_ANY, | |
306 | .extra = SERIO_ANY, | |
307 | }, | |
308 | { | |
309 | .type = SERIO_RS232, | |
310 | .proto = SERIO_MS, | |
311 | .id = SERIO_ANY, | |
312 | .extra = SERIO_ANY, | |
313 | }, | |
314 | { | |
315 | .type = SERIO_RS232, | |
316 | .proto = SERIO_MP, | |
317 | .id = SERIO_ANY, | |
318 | .extra = SERIO_ANY, | |
319 | }, | |
320 | { | |
321 | .type = SERIO_RS232, | |
322 | .proto = SERIO_MZ, | |
323 | .id = SERIO_ANY, | |
324 | .extra = SERIO_ANY, | |
325 | }, | |
326 | { | |
327 | .type = SERIO_RS232, | |
328 | .proto = SERIO_MZP, | |
329 | .id = SERIO_ANY, | |
330 | .extra = SERIO_ANY, | |
331 | }, | |
332 | { | |
333 | .type = SERIO_RS232, | |
334 | .proto = SERIO_MZPP, | |
335 | .id = SERIO_ANY, | |
336 | .extra = SERIO_ANY, | |
337 | }, | |
338 | { 0 } | |
339 | }; | |
340 | ||
341 | MODULE_DEVICE_TABLE(serio, sermouse_serio_ids); | |
342 | ||
343 | static struct serio_driver sermouse_drv = { | |
344 | .driver = { | |
345 | .name = "sermouse", | |
346 | }, | |
347 | .description = DRIVER_DESC, | |
348 | .id_table = sermouse_serio_ids, | |
349 | .interrupt = sermouse_interrupt, | |
350 | .connect = sermouse_connect, | |
351 | .disconnect = sermouse_disconnect, | |
352 | }; | |
353 | ||
354 | static int __init sermouse_init(void) | |
355 | { | |
356 | serio_register_driver(&sermouse_drv); | |
357 | return 0; | |
358 | } | |
359 | ||
360 | static void __exit sermouse_exit(void) | |
361 | { | |
362 | serio_unregister_driver(&sermouse_drv); | |
363 | } | |
364 | ||
365 | module_init(sermouse_init); | |
366 | module_exit(sermouse_exit); |