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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);
230
231TRACKPOINT_BIT_ATTR(press_to_select, TP_TOGGLE_PTSON, TP_MASK_PTSON, 0,
232 TP_DEF_PTSON);
233TRACKPOINT_BIT_ATTR(skipback, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK, 0,
234 TP_DEF_SKIPBACK);
235TRACKPOINT_BIT_ATTR(ext_dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV, 1,
236 TP_DEF_EXT_DEV);
237
238static struct attribute *trackpoint_attrs[] = {
239 &psmouse_attr_sensitivity.dattr.attr,
240 &psmouse_attr_speed.dattr.attr,
241 &psmouse_attr_inertia.dattr.attr,
242 &psmouse_attr_reach.dattr.attr,
243 &psmouse_attr_draghys.dattr.attr,
244 &psmouse_attr_mindrag.dattr.attr,
245 &psmouse_attr_thresh.dattr.attr,
246 &psmouse_attr_upthresh.dattr.attr,
247 &psmouse_attr_ztime.dattr.attr,
248 &psmouse_attr_jenks.dattr.attr,
249 &psmouse_attr_press_to_select.dattr.attr,
250 &psmouse_attr_skipback.dattr.attr,
251 &psmouse_attr_ext_dev.dattr.attr,
252 NULL
253};
254
255static struct attribute_group trackpoint_attr_group = {
256 .attrs = trackpoint_attrs,
257};
258
259static int trackpoint_start_protocol(struct psmouse *psmouse, unsigned char *firmware_id)
260{
261 unsigned char param[2] = { 0 };
262
263 if (ps2_command(&psmouse->ps2dev, param, MAKE_PS2_CMD(0, 2, TP_READ_ID)))
264 return -1;
265
266 if (param[0] != TP_MAGIC_IDENT)
267 return -1;
268
269 if (firmware_id)
270 *firmware_id = param[1];
271
272 return 0;
273}
274
275
276
277
278
279
280
281static int trackpoint_sync(struct psmouse *psmouse, bool in_power_on_state)
282{
283 struct trackpoint_data *tp = psmouse->private;
284
285 if (!in_power_on_state) {
286
287
288
289
290 trackpoint_update_bit(&psmouse->ps2dev, TP_TOGGLE_TWOHAND,
291 TP_MASK_TWOHAND, TP_DEF_TWOHAND);
292
293 trackpoint_update_bit(&psmouse->ps2dev, TP_TOGGLE_SOURCE_TAG,
294 TP_MASK_SOURCE_TAG, TP_DEF_SOURCE_TAG);
295
296 trackpoint_update_bit(&psmouse->ps2dev, TP_TOGGLE_MB,
297 TP_MASK_MB, TP_DEF_MB);
298 }
299
300
301
302
303
304
305 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, sensitivity);
306 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, inertia);
307 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, speed);
308 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, reach);
309 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, draghys);
310 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, mindrag);
311 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, thresh);
312 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, upthresh);
313 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, ztime);
314 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, jenks);
315
316
317 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, press_to_select);
318 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, skipback);
319 TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, ext_dev);
320
321 return 0;
322}
323
324static void trackpoint_defaults(struct trackpoint_data *tp)
325{
326 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, sensitivity);
327 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, speed);
328 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, reach);
329 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, draghys);
330 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, mindrag);
331 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, thresh);
332 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, upthresh);
333 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, ztime);
334 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, jenks);
335 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, inertia);
336
337
338 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, press_to_select);
339 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, skipback);
340 TRACKPOINT_SET_POWER_ON_DEFAULT(tp, ext_dev);
341}
342
343static void trackpoint_disconnect(struct psmouse *psmouse)
344{
345 sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, &trackpoint_attr_group);
346
347 kfree(psmouse->private);
348 psmouse->private = NULL;
349}
350
351static int trackpoint_reconnect(struct psmouse *psmouse)
352{
353 int reset_fail;
354
355 if (trackpoint_start_protocol(psmouse, NULL))
356 return -1;
357
358 reset_fail = trackpoint_power_on_reset(&psmouse->ps2dev);
359 if (trackpoint_sync(psmouse, !reset_fail))
360 return -1;
361
362 return 0;
363}
364
365int trackpoint_detect(struct psmouse *psmouse, bool set_properties)
366{
367 struct ps2dev *ps2dev = &psmouse->ps2dev;
368 unsigned char firmware_id;
369 unsigned char button_info;
370 int error;
371
372 if (trackpoint_start_protocol(psmouse, &firmware_id))
373 return -1;
374
375 if (!set_properties)
376 return 0;
377
378 if (trackpoint_read(&psmouse->ps2dev, TP_EXT_BTN, &button_info)) {
379 psmouse_warn(psmouse, "failed to get extended button data\n");
380 button_info = 0;
381 }
382
383 psmouse->private = kzalloc(sizeof(struct trackpoint_data), GFP_KERNEL);
384 if (!psmouse->private)
385 return -ENOMEM;
386
387 psmouse->vendor = "IBM";
388 psmouse->name = "TrackPoint";
389
390 psmouse->reconnect = trackpoint_reconnect;
391 psmouse->disconnect = trackpoint_disconnect;
392
393 if ((button_info & 0x0f) >= 3)
394 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
395
396 trackpoint_defaults(psmouse->private);
397
398 error = trackpoint_power_on_reset(&psmouse->ps2dev);
399
400
401 if (error)
402 trackpoint_sync(psmouse, false);
403
404 error = sysfs_create_group(&ps2dev->serio->dev.kobj, &trackpoint_attr_group);
405 if (error) {
406 psmouse_err(psmouse,
407 "failed to create sysfs attributes, error: %d\n",
408 error);
409 kfree(psmouse->private);
410 psmouse->private = NULL;
411 return -1;
412 }
413
414 psmouse_info(psmouse,
415 "IBM TrackPoint firmware: 0x%02x, buttons: %d/%d\n",
416 firmware_id,
417 (button_info & 0xf0) >> 4, button_info & 0x0f);
418
419 return 0;
420}
421
422
