1
2
3
4
5
6
7
8
9
10
11#include <linux/slab.h>
12#include <linux/delay.h>
13#include <linux/serio.h>
14#include <linux/module.h>
15#include <linux/input.h>
16#include <linux/libps2.h>
17#include <linux/proc_fs.h>
18#include <asm/uaccess.h>
19#include "psmouse.h"
20#include "trackpoint.h"
21
22
23
24
25
26
27static int trackpoint_power_on_reset(struct ps2dev *ps2dev)
28{
29 unsigned char results[2];
30 int tries = 0;
31
32
33 do {
34 if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) ||
35 ps2_command(ps2dev, results, MAKE_PS2_CMD(0, 2, TP_POR)))
36 return -1;
37 } while (results[0] == 0xFC && results[1] == 0x00 && ++tries < 2);
38
39
40 if (results[0] != 0xAA || results[1] != 0x00)
41 return -1;
42
43 return 0;
44}
45
46
47
48
49static int trackpoint_read(struct ps2dev *ps2dev,
50 unsigned char loc, unsigned char *results)
51{
52 if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) ||
53 ps2_command(ps2dev, results, MAKE_PS2_CMD(0, 1, loc))) {
54 return -1;
55 }
56
57 return 0;
58}
59
60static int trackpoint_write(struct ps2dev *ps2dev,
61 unsigned char loc, unsigned char val)
62{
63 if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) ||
64 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_WRITE_MEM)) ||
65 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, loc)) ||
66 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, val))) {
67 return -1;
68 }
69
70 return 0;
71}
72
73static int trackpoint_toggle_bit(struct ps2dev *ps2dev,
74 unsigned char loc, unsigned char mask)
75{
76
77 if (loc < 0x20 || loc >= 0x2F)
78 return -1;
79
80 if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) ||
81 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_TOGGLE)) ||
82 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, loc)) ||
83 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, mask))) {
84 return -1;
85 }
86
87 return 0;
88}
89
90static int trackpoint_update_bit(struct ps2dev *ps2dev, unsigned char loc,
91 unsigned char mask, unsigned char value)
92{
93 int retval = 0;
94 unsigned char data;
95
96 trackpoint_read(ps2dev, loc, &data);
97 if (((data & mask) == mask) != !!value)
98 retval = trackpoint_toggle_bit(ps2dev, loc, mask);
99
100 return retval;
101}
102
103
104
105
106struct trackpoint_attr_data {
107 size_t field_offset;
108 unsigned char command;
109 unsigned char mask;
110 unsigned char inverted;
111 unsigned char power_on_default;
112};
113
114static ssize_t trackpoint_show_int_attr(struct psmouse *psmouse, void *data, char *buf)
115{
116 struct trackpoint_data *tp = psmouse->private;
117 struct trackpoint_attr_data *attr = data;
118 unsigned char value = *(unsigned char *)((char *)tp + attr->field_offset);
119
120 if (attr->inverted)
121 value = !value;
122
123 return sprintf(buf, "%u\n", value);
124}
125
126static ssize_t trackpoint_set_int_attr(struct psmouse *psmouse, void *data,
127 const char *buf, size_t count)
128{
129 struct trackpoint_data *tp = psmouse->private;
130 struct trackpoint_attr_data *attr = data;
131 unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset);
132 unsigned char value;
133 int err;
134
135 err = kstrtou8(buf, 10, &value);
136 if (err)
137 return err;
138
139 *field = value;
140 trackpoint_write(&psmouse->ps2dev, attr->command, value);
141
142 return count;
143}
144
145#define TRACKPOINT_INT_ATTR(_name, _command, _default) \
146 static struct trackpoint_attr_data trackpoint_attr_##_name = { \
147 .field_offset = offsetof(struct trackpoint_data, _name), \
148 .command = _command, \
149 .power_on_default = _default, \
150 }; \
151 PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
152 &trackpoint_attr_##_name, \
153 trackpoint_show_int_attr, trackpoint_set_int_attr)
154
155static ssize_t trackpoint_set_bit_attr(struct psmouse *psmouse, void *data,
156 const char *buf, size_t count)
157{
158 struct trackpoint_data *tp = psmouse->private;
159 struct trackpoint_attr_data *attr = data;
160 unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset);
161 unsigned int value;
162 int err;
163
164 err = kstrtouint(buf, 10, &value);
165 if (err)
166 return err;
167
168 if (value > 1)
169 return -EINVAL;
170
171 if (attr->inverted)
172 value = !value;
173
174 if (*field != value) {
175 *field = value;
176 trackpoint_toggle_bit(&psmouse->ps2dev, attr->command, attr->mask);
177 }
178
179 return count;
180}
181
182
183#define TRACKPOINT_BIT_ATTR(_name, _command, _mask, _inv, _default) \
184static struct trackpoint_attr_data trackpoint_attr_##_name = { \
185 .field_offset = offsetof(struct trackpoint_data, \
186 _name), \
187 .command = _command, \
188 .mask = _mask, \
189 .inverted = _inv, \
190 .power_on_default = _default, \
191 }; \
192PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
193 &trackpoint_attr_##_name, \
194 trackpoint_show_int_attr, trackpoint_set_bit_attr)
195
196#define TRACKPOINT_UPDATE_BIT(_psmouse, _tp, _name) \
197do { \
198 struct trackpoint_attr_data *_attr = &trackpoint_attr_##_name; \
199 \
200 trackpoint_update_bit(&_psmouse->ps2dev, \
201 _attr->command, _attr->mask, _tp->_name); \
202} while (0)
203
204#define TRACKPOINT_UPDATE(_power_on, _psmouse, _tp, _name) \
205do { \
206 if (!_power_on || \
207 _tp->_name != trackpoint_attr_##_name.power_on_default) { \
208 if (!trackpoint_attr_##_name.mask) \
209 trackpoint_write(&_psmouse->ps2dev, \
210 trackpoint_attr_##_name.command, \
211 _tp->_name); \
212 else \
213 TRACKPOINT_UPDATE_BIT(_psmouse, _tp, _name); \
214 } \
215} while (0)
216
217#define TRACKPOINT_SET_POWER_ON_DEFAULT(_tp, _name) \
218 (_tp->_name = trackpoint_attr_##_name.power_on_default)
219
220TRACKPOINT_INT_ATTR(sensitivity, TP_SENS, TP_DEF_SENS);
221TRACKPOINT_INT_ATTR(speed, TP_SPEED, TP_DEF_SPEED);
222TRACKPOINT_INT_ATTR(inertia, TP_INERTIA, TP_DEF_INERTIA);
223TRACKPOINT_INT_ATTR(reach, TP_REACH, TP_DEF_REACH);
224TRACKPOINT_INT_ATTR(draghys, TP_DRAGHYS, TP_DEF_DRAGHYS);
225TRACKPOINT_INT_ATTR(mindrag, TP_MINDRAG, TP_DEF_MINDRAG);
226TRACKPOINT_INT_ATTR(thresh, TP_THRESH, TP_DEF_THRESH);
227TRACKPOINT_INT_ATTR(upthresh, TP_UP_THRESH, TP_DEF_UP_THRESH);
228TRACKPOINT_INT_ATTR(ztime, TP_Z_TIME, TP_DEF_Z_TIME);
229TRACKPOINT_INT_ATTR(jenks, TP_JENKS_CURV, TP_DEF_JENKS_CURV);
230TRACKPOINT_INT_ATTR(drift_time, TP_DRIFT_TIME, TP_DEF_DRIFT_TIME);
231
232TRACKPOINT_BIT_ATTR(press_to_select, TP_TOGGLE_PTSON, TP_MASK_PTSON, 0,
233 TP_DEF_PTSON);
234TRACKPOINT_BIT_ATTR(skipback, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK, 0,
235 TP_DEF_SKIPBACK);
236TRACKPOINT_BIT_ATTR(ext_dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV, 1,
237 TP_DEF_EXT_DEV);
238
239static struct attribute *trackpoint_attrs[] = {
240 &psmouse_attr_sensitivity.dattr.attr,
241 &psmouse_attr_speed.dattr.attr,
242 &psmouse_attr_inertia.dattr.attr,
243 &psmouse_attr_reach.dattr.attr,
244 &psmouse_attr_draghys.dattr.attr,
245 &psmouse_attr_mindrag.dattr.attr,
246 &psmouse_attr_thresh.dattr.attr,
247 &psmouse_attr_upthresh.dattr.attr,
248 &psmouse_attr_ztime.dattr.attr,
249 &psmouse_attr_jenks.dattr.attr,
250 &psmouse_attr_drift_time.dattr.attr,
251 &psmouse_attr_press_to_select.dattr.attr,
252 &psmouse_attr_skipback.dattr.attr,
253 &psmouse_attr_ext_dev.dattr.attr,
254 NULL
255};
256
257static struct attribute_group trackpoint_attr_group = {
258 .attrs = trackpoint_attrs,
259};
260
261static int trackpoint_start_protocol(struct psmouse *psmouse, unsigned char *firmware_id)
262{
263 unsigned char param[2] = { 0 };
264
265 if (ps2_command(&psmouse->ps2dev, param, MAKE_PS2_CMD(0, 2, TP_READ_ID)))
266 return -1;
267
268 if (param[0] != TP_MAGIC_IDENT)
269 return -1;
270
271 if (firmware_id)
272 *firmware_id = param[1];
273
274 return 0;
275}
276
277
278
279
280
281
282
283static int trackpoint_sync(struct psmouse *psmouse, bool in_power_on_state)
284{
285 struct trackpoint_data *tp = psmouse->private;
286
287 if (!in_power_on_state) {
288
289
290
291
292 trackpoint_update_bit(&psmouse->ps2dev, TP_TOGGLE_TWOHAND,
293 TP_MASK_TWOHAND, TP_DEF_TWOHAND);
294
295 trackpoint_update_bit(&psmouse->ps2dev, TP_TOGGLE_SOURCE_TAG,
296 TP_MASK_SOURCE_TAG, TP_DEF_SOURCE_TAG);
297
298 trackpoint_update_bit(&psmouse->ps2dev, TP_TOGGLE_MB,
299 TP_MASK_MB, TP_DEF_MB);
300 }
301
302
303
304
305
306
307 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, sensitivity);
308 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, inertia);
309 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, speed);
310 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, reach);
311 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, draghys);
312 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, mindrag);
313 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, thresh);
314 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, upthresh);
315 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, ztime);
316 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, jenks);
317 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, drift_time);
318
319
320 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, press_to_select);
321 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, skipback);
322 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, ext_dev);
323
324 return 0;
325}
326
327static void trackpoint_defaults(struct trackpoint_data *tp)
328{
329 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, sensitivity);
330 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, speed);
331 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, reach);
332 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, draghys);
333 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, mindrag);
334 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, thresh);
335 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, upthresh);
336 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, ztime);
337 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, jenks);
338 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, drift_time);
339 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, inertia);
340
341
342 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, press_to_select);
343 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, skipback);
344 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, ext_dev);
345}
346
347static void trackpoint_disconnect(struct psmouse *psmouse)
348{
349 sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, &trackpoint_attr_group);
350
351 kfree(psmouse->private);
352 psmouse->private = NULL;
353}
354
355static int trackpoint_reconnect(struct psmouse *psmouse)
356{
357 int reset_fail;
358
359 if (trackpoint_start_protocol(psmouse, NULL))
360 return -1;
361
362 reset_fail = trackpoint_power_on_reset(&psmouse->ps2dev);
363 if (trackpoint_sync(psmouse, !reset_fail))
364 return -1;
365
366 return 0;
367}
368
369int trackpoint_detect(struct psmouse *psmouse, bool set_properties)
370{
371 struct ps2dev *ps2dev = &psmouse->ps2dev;
372 unsigned char firmware_id;
373 unsigned char button_info;
374 int error;
375
376 if (trackpoint_start_protocol(psmouse, &firmware_id))
377 return -1;
378
379 if (!set_properties)
380 return 0;
381
382 if (trackpoint_read(&psmouse->ps2dev, TP_EXT_BTN, &button_info)) {
383 psmouse_warn(psmouse, "failed to get extended button data\n");
384 button_info = 0;
385 }
386
387 psmouse->private = kzalloc(sizeof(struct trackpoint_data), GFP_KERNEL);
388 if (!psmouse->private)
389 return -ENOMEM;
390
391 psmouse->vendor = "IBM";
392 psmouse->name = "TrackPoint";
393
394 psmouse->reconnect = trackpoint_reconnect;
395 psmouse->disconnect = trackpoint_disconnect;
396
397 if ((button_info & 0x0f) >= 3)
398 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
399
400 __set_bit(INPUT_PROP_POINTER, psmouse->dev->propbit);
401 __set_bit(INPUT_PROP_POINTING_STICK, psmouse->dev->propbit);
402
403 trackpoint_defaults(psmouse->private);
404
405 error = trackpoint_power_on_reset(&psmouse->ps2dev);
406
407
408 if (error)
409 trackpoint_sync(psmouse, false);
410
411 error = sysfs_create_group(&ps2dev->serio->dev.kobj, &trackpoint_attr_group);
412 if (error) {
413 psmouse_err(psmouse,
414 "failed to create sysfs attributes, error: %d\n",
415 error);
416 kfree(psmouse->private);
417 psmouse->private = NULL;
418 return -1;
419 }
420
421 psmouse_info(psmouse,
422 "IBM TrackPoint firmware: 0x%02x, buttons: %d/%d\n",
423 firmware_id,
424 (button_info & 0xf0) >> 4, button_info & 0x0f);
425
426 return 0;
427}
428
429
