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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
36#define DRIVER_DESC "Serial mouse driver"
37
38MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
39MODULE_DESCRIPTION(DRIVER_DESC);
40MODULE_LICENSE("GPL");
41
42static const char *sermouse_protocols[] = { "None", "Mouse Systems Mouse", "Sun Mouse", "Microsoft Mouse",
43 "Logitech M+ Mouse", "Microsoft MZ Mouse", "Logitech MZ+ Mouse",
44 "Logitech MZ++ Mouse"};
45
46struct sermouse {
47 struct input_dev *dev;
48 signed char buf[8];
49 unsigned char count;
50 unsigned char type;
51 unsigned long last;
52 char phys[32];
53};
54
55
56
57
58
59
60
61static void sermouse_process_msc(struct sermouse *sermouse, signed char data)
62{
63 struct input_dev *dev = sermouse->dev;
64 signed char *buf = sermouse->buf;
65
66 switch (sermouse->count) {
67
68 case 0:
69 if ((data & 0xf8) != 0x80)
70 return;
71 input_report_key(dev, BTN_LEFT, !(data & 4));
72 input_report_key(dev, BTN_RIGHT, !(data & 1));
73 input_report_key(dev, BTN_MIDDLE, !(data & 2));
74 break;
75
76 case 1:
77 case 3:
78 input_report_rel(dev, REL_X, data / 2);
79 input_report_rel(dev, REL_Y, -buf[1]);
80 buf[0] = data - data / 2;
81 break;
82
83 case 2:
84 case 4:
85 input_report_rel(dev, REL_X, buf[0]);
86 input_report_rel(dev, REL_Y, buf[1] - data);
87 buf[1] = data / 2;
88 break;
89 }
90
91 input_sync(dev);
92
93 if (++sermouse->count == 5)
94 sermouse->count = 0;
95}
96
97
98
99
100
101
102
103static void sermouse_process_ms(struct sermouse *sermouse, signed char data)
104{
105 struct input_dev *dev = sermouse->dev;
106 signed char *buf = sermouse->buf;
107
108 if (data & 0x40)
109 sermouse->count = 0;
110 else if (sermouse->count == 0)
111 return;
112
113 switch (sermouse->count) {
114
115 case 0:
116 buf[1] = data;
117 input_report_key(dev, BTN_LEFT, (data >> 5) & 1);
118 input_report_key(dev, BTN_RIGHT, (data >> 4) & 1);
119 break;
120
121 case 1:
122 buf[2] = data;
123 data = (signed char) (((buf[1] << 6) & 0xc0) | (data & 0x3f));
124 input_report_rel(dev, REL_X, data / 2);
125 input_report_rel(dev, REL_Y, buf[4]);
126 buf[3] = data - data / 2;
127 break;
128
129 case 2:
130
131 if ((sermouse->type == SERIO_MS) && !data && !buf[2] && !((buf[0] & 0xf0) ^ buf[1]))
132 input_report_key(dev, BTN_MIDDLE, !test_bit(BTN_MIDDLE, dev->key));
133 buf[0] = buf[1];
134
135 data = (signed char) (((buf[1] << 4) & 0xc0) | (data & 0x3f));
136 input_report_rel(dev, REL_X, buf[3]);
137 input_report_rel(dev, REL_Y, data - buf[4]);
138 buf[4] = data / 2;
139 break;
140
141 case 3:
142
143 switch (sermouse->type) {
144
145 case SERIO_MS:
146 sermouse->type = SERIO_MP;
147
148 case SERIO_MP:
149 if ((data >> 2) & 3) break;
150 input_report_key(dev, BTN_MIDDLE, (data >> 5) & 1);
151 input_report_key(dev, BTN_SIDE, (data >> 4) & 1);
152 break;
153
154 case SERIO_MZP:
155 case SERIO_MZPP:
156 input_report_key(dev, BTN_SIDE, (data >> 5) & 1);
157
158 case SERIO_MZ:
159 input_report_key(dev, BTN_MIDDLE, (data >> 4) & 1);
160 input_report_rel(dev, REL_WHEEL, (data & 8) - (data & 7));
161 break;
162 }
163
164 break;
165
166 case 4:
167 case 6:
168 buf[1] = (data >> 2) & 0x0f;
169 break;
170
171 case 5:
172 case 7:
173 if (sermouse->type != SERIO_MZPP)
174 break;
175
176 switch (buf[1]) {
177
178 case 1:
179
180 input_report_key(dev, BTN_SIDE, (data >> 4) & 1);
181 input_report_key(dev, BTN_EXTRA, (data >> 5) & 1);
182 input_report_rel(dev, data & 0x80 ? REL_HWHEEL : REL_WHEEL, (data & 7) - (data & 8));
183
184 break;
185
186 default:
187
188 printk(KERN_WARNING
189 "sermouse.c: Received MZ++ packet %x, don't know how to handle.\n", buf[1]);
190 break;
191 }
192
193 break;
194 }
195
196 input_sync(dev);
197
198 sermouse->count++;
199}
200
201
202
203
204
205
206static irqreturn_t sermouse_interrupt(struct serio *serio,
207 unsigned char data, unsigned int flags)
208{
209 struct sermouse *sermouse = serio_get_drvdata(serio);
210
211 if (time_after(jiffies, sermouse->last + HZ/10))
212 sermouse->count = 0;
213
214 sermouse->last = jiffies;
215
216 if (sermouse->type > SERIO_SUN)
217 sermouse_process_ms(sermouse, data);
218 else
219 sermouse_process_msc(sermouse, data);
220
221 return IRQ_HANDLED;
222}
223
224
225
226
227
228
229static void sermouse_disconnect(struct serio *serio)
230{
231 struct sermouse *sermouse = serio_get_drvdata(serio);
232
233 serio_close(serio);
234 serio_set_drvdata(serio, NULL);
235 input_unregister_device(sermouse->dev);
236 kfree(sermouse);
237}
238
239
240
241
242
243
244static int sermouse_connect(struct serio *serio, struct serio_driver *drv)
245{
246 struct sermouse *sermouse;
247 struct input_dev *input_dev;
248 unsigned char c = serio->id.extra;
249 int err = -ENOMEM;
250
251 sermouse = kzalloc(sizeof(struct sermouse), GFP_KERNEL);
252 input_dev = input_allocate_device();
253 if (!sermouse || !input_dev)
254 goto fail1;
255
256 sermouse->dev = input_dev;
257 snprintf(sermouse->phys, sizeof(sermouse->phys), "%s/input0", serio->phys);
258 sermouse->type = serio->id.proto;
259
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->dev.parent = &serio->dev;
267
268 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
269 input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
270 BIT_MASK(BTN_RIGHT);
271 input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
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);
278
279 serio_set_drvdata(serio, sermouse);
280
281 err = serio_open(serio, drv);
282 if (err)
283 goto fail2;
284
285 err = input_register_device(sermouse->dev);
286 if (err)
287 goto fail3;
288
289 return 0;
290
291 fail3: serio_close(serio);
292 fail2: serio_set_drvdata(serio, NULL);
293 fail1: input_free_device(input_dev);
294 kfree(sermouse);
295 return err;
296}
297
298static struct serio_device_id sermouse_serio_ids[] = {
299 {
300 .type = SERIO_RS232,
301 .proto = SERIO_MSC,
302 .id = SERIO_ANY,
303 .extra = SERIO_ANY,
304 },
305 {
306 .type = SERIO_RS232,
307 .proto = SERIO_SUN,
308 .id = SERIO_ANY,
309 .extra = SERIO_ANY,
310 },
311 {
312 .type = SERIO_RS232,
313 .proto = SERIO_MS,
314 .id = SERIO_ANY,
315 .extra = SERIO_ANY,
316 },
317 {
318 .type = SERIO_RS232,
319 .proto = SERIO_MP,
320 .id = SERIO_ANY,
321 .extra = SERIO_ANY,
322 },
323 {
324 .type = SERIO_RS232,
325 .proto = SERIO_MZ,
326 .id = SERIO_ANY,
327 .extra = SERIO_ANY,
328 },
329 {
330 .type = SERIO_RS232,
331 .proto = SERIO_MZP,
332 .id = SERIO_ANY,
333 .extra = SERIO_ANY,
334 },
335 {
336 .type = SERIO_RS232,
337 .proto = SERIO_MZPP,
338 .id = SERIO_ANY,
339 .extra = SERIO_ANY,
340 },
341 { 0 }
342};
343
344MODULE_DEVICE_TABLE(serio, sermouse_serio_ids);
345
346static struct serio_driver sermouse_drv = {
347 .driver = {
348 .name = "sermouse",
349 },
350 .description = DRIVER_DESC,
351 .id_table = sermouse_serio_ids,
352 .interrupt = sermouse_interrupt,
353 .connect = sermouse_connect,
354 .disconnect = sermouse_disconnect,
355};
356
357module_serio_driver(sermouse_drv);
358