summaryrefslogtreecommitdiff
path: root/usr/src/dkms_source_tree/trackpoint.c
diff options
context:
space:
mode:
Diffstat (limited to 'usr/src/dkms_source_tree/trackpoint.c')
-rw-r--r--usr/src/dkms_source_tree/trackpoint.c335
1 files changed, 335 insertions, 0 deletions
diff --git a/usr/src/dkms_source_tree/trackpoint.c b/usr/src/dkms_source_tree/trackpoint.c
new file mode 100644
index 0000000..0643e49
--- /dev/null
+++ b/usr/src/dkms_source_tree/trackpoint.c
@@ -0,0 +1,335 @@
1/*
2 * Stephen Evanchik <evanchsa@gmail.com>
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published by
6 * the Free Software Foundation.
7 *
8 * Trademarks are the property of their respective owners.
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 * Device IO: read, write and toggle bit
24 */
25static int trackpoint_read(struct ps2dev *ps2dev, unsigned char loc, unsigned char *results)
26{
27 if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) ||
28 ps2_command(ps2dev, results, MAKE_PS2_CMD(0, 1, loc))) {
29 return -1;
30 }
31
32 return 0;
33}
34
35static int trackpoint_write(struct ps2dev *ps2dev, unsigned char loc, unsigned char val)
36{
37 if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) ||
38 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_WRITE_MEM)) ||
39 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, loc)) ||
40 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, val))) {
41 return -1;
42 }
43
44 return 0;
45}
46
47static int trackpoint_toggle_bit(struct ps2dev *ps2dev, unsigned char loc, unsigned char mask)
48{
49 /* Bad things will happen if the loc param isn't in this range */
50 if (loc < 0x20 || loc >= 0x2F)
51 return -1;
52
53 if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) ||
54 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_TOGGLE)) ||
55 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, loc)) ||
56 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, mask))) {
57 return -1;
58 }
59
60 return 0;
61}
62
63
64/*
65 * Trackpoint-specific attributes
66 */
67struct trackpoint_attr_data {
68 size_t field_offset;
69 unsigned char command;
70 unsigned char mask;
71 unsigned char inverted;
72};
73
74static ssize_t trackpoint_show_int_attr(struct psmouse *psmouse, void *data, char *buf)
75{
76 struct trackpoint_data *tp = psmouse->private;
77 struct trackpoint_attr_data *attr = data;
78 unsigned char value = *(unsigned char *)((char *)tp + attr->field_offset);
79
80 if (attr->inverted)
81 value = !value;
82
83 return sprintf(buf, "%u\n", value);
84}
85
86static ssize_t trackpoint_set_int_attr(struct psmouse *psmouse, void *data,
87 const char *buf, size_t count)
88{
89 struct trackpoint_data *tp = psmouse->private;
90 struct trackpoint_attr_data *attr = data;
91 unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset);
92 unsigned long value;
93
94 if (strict_strtoul(buf, 10, &value) || value > 255)
95 return -EINVAL;
96
97 *field = value;
98 trackpoint_write(&psmouse->ps2dev, attr->command, value);
99
100 return count;
101}
102
103#define TRACKPOINT_INT_ATTR(_name, _command) \
104 static struct trackpoint_attr_data trackpoint_attr_##_name = { \
105 .field_offset = offsetof(struct trackpoint_data, _name), \
106 .command = _command, \
107 }; \
108 PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
109 &trackpoint_attr_##_name, \
110 trackpoint_show_int_attr, trackpoint_set_int_attr)
111
112static ssize_t trackpoint_set_bit_attr(struct psmouse *psmouse, void *data,
113 const char *buf, size_t count)
114{
115 struct trackpoint_data *tp = psmouse->private;
116 struct trackpoint_attr_data *attr = data;
117 unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset);
118 unsigned long value;
119
120 if (strict_strtoul(buf, 10, &value) || value > 1)
121 return -EINVAL;
122
123 if (attr->inverted)
124 value = !value;
125
126 if (*field != value) {
127 *field = value;
128 trackpoint_toggle_bit(&psmouse->ps2dev, attr->command, attr->mask);
129 }
130
131 return count;
132}
133
134
135#define TRACKPOINT_BIT_ATTR(_name, _command, _mask, _inv) \
136 static struct trackpoint_attr_data trackpoint_attr_##_name = { \
137 .field_offset = offsetof(struct trackpoint_data, _name), \
138 .command = _command, \
139 .mask = _mask, \
140 .inverted = _inv, \
141 }; \
142 PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
143 &trackpoint_attr_##_name, \
144 trackpoint_show_int_attr, trackpoint_set_bit_attr)
145
146TRACKPOINT_INT_ATTR(sensitivity, TP_SENS);
147TRACKPOINT_INT_ATTR(speed, TP_SPEED);
148TRACKPOINT_INT_ATTR(inertia, TP_INERTIA);
149TRACKPOINT_INT_ATTR(reach, TP_REACH);
150TRACKPOINT_INT_ATTR(draghys, TP_DRAGHYS);
151TRACKPOINT_INT_ATTR(mindrag, TP_MINDRAG);
152TRACKPOINT_INT_ATTR(thresh, TP_THRESH);
153TRACKPOINT_INT_ATTR(upthresh, TP_UP_THRESH);
154TRACKPOINT_INT_ATTR(ztime, TP_Z_TIME);
155TRACKPOINT_INT_ATTR(jenks, TP_JENKS_CURV);
156
157TRACKPOINT_BIT_ATTR(press_to_select, TP_TOGGLE_PTSON, TP_MASK_PTSON, 0);
158TRACKPOINT_BIT_ATTR(skipback, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK, 0);
159TRACKPOINT_BIT_ATTR(ext_dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV, 1);
160
161static struct attribute *trackpoint_attrs[] = {
162 &psmouse_attr_sensitivity.dattr.attr,
163 &psmouse_attr_speed.dattr.attr,
164 &psmouse_attr_inertia.dattr.attr,
165 &psmouse_attr_reach.dattr.attr,
166 &psmouse_attr_draghys.dattr.attr,
167 &psmouse_attr_mindrag.dattr.attr,
168 &psmouse_attr_thresh.dattr.attr,
169 &psmouse_attr_upthresh.dattr.attr,
170 &psmouse_attr_ztime.dattr.attr,
171 &psmouse_attr_jenks.dattr.attr,
172 &psmouse_attr_press_to_select.dattr.attr,
173 &psmouse_attr_skipback.dattr.attr,
174 &psmouse_attr_ext_dev.dattr.attr,
175 NULL
176};
177
178static struct attribute_group trackpoint_attr_group = {
179 .attrs = trackpoint_attrs,
180};
181
182static int trackpoint_start_protocol(struct psmouse *psmouse, unsigned char *firmware_id)
183{
184 unsigned char param[2] = { 0 };
185
186 if (ps2_command(&psmouse->ps2dev, param, MAKE_PS2_CMD(0, 2, TP_READ_ID)))
187 return -1;
188
189 if (param[0] != TP_MAGIC_IDENT)
190 return -1;
191
192 if (firmware_id)
193 *firmware_id = param[1];
194
195 return 0;
196}
197
198static int trackpoint_sync(struct psmouse *psmouse)
199{
200 struct trackpoint_data *tp = psmouse->private;
201 unsigned char toggle;
202
203 /* Disable features that may make device unusable with this driver */
204 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_TWOHAND, &toggle);
205 if (toggle & TP_MASK_TWOHAND)
206 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_TWOHAND, TP_MASK_TWOHAND);
207
208 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_SOURCE_TAG, &toggle);
209 if (toggle & TP_MASK_SOURCE_TAG)
210 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_SOURCE_TAG, TP_MASK_SOURCE_TAG);
211
212 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_MB, &toggle);
213 if (toggle & TP_MASK_MB)
214 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_MB, TP_MASK_MB);
215
216 /* Push the config to the device */
217 trackpoint_write(&psmouse->ps2dev, TP_SENS, tp->sensitivity);
218 trackpoint_write(&psmouse->ps2dev, TP_INERTIA, tp->inertia);
219 trackpoint_write(&psmouse->ps2dev, TP_SPEED, tp->speed);
220
221 trackpoint_write(&psmouse->ps2dev, TP_REACH, tp->reach);
222 trackpoint_write(&psmouse->ps2dev, TP_DRAGHYS, tp->draghys);
223 trackpoint_write(&psmouse->ps2dev, TP_MINDRAG, tp->mindrag);
224
225 trackpoint_write(&psmouse->ps2dev, TP_THRESH, tp->thresh);
226 trackpoint_write(&psmouse->ps2dev, TP_UP_THRESH, tp->upthresh);
227
228 trackpoint_write(&psmouse->ps2dev, TP_Z_TIME, tp->ztime);
229 trackpoint_write(&psmouse->ps2dev, TP_JENKS_CURV, tp->jenks);
230
231 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_PTSON, &toggle);
232 if (((toggle & TP_MASK_PTSON) == TP_MASK_PTSON) != tp->press_to_select)
233 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_PTSON, TP_MASK_PTSON);
234
235 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_SKIPBACK, &toggle);
236 if (((toggle & TP_MASK_SKIPBACK) == TP_MASK_SKIPBACK) != tp->skipback)
237 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK);
238
239 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_EXT_DEV, &toggle);
240 if (((toggle & TP_MASK_EXT_DEV) == TP_MASK_EXT_DEV) != tp->ext_dev)
241 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV);
242
243 return 0;
244}
245
246static void trackpoint_defaults(struct trackpoint_data *tp)
247{
248 tp->press_to_select = TP_DEF_PTSON;
249 tp->sensitivity = TP_DEF_SENS;
250 tp->speed = TP_DEF_SPEED;
251 tp->reach = TP_DEF_REACH;
252
253 tp->draghys = TP_DEF_DRAGHYS;
254 tp->mindrag = TP_DEF_MINDRAG;
255
256 tp->thresh = TP_DEF_THRESH;
257 tp->upthresh = TP_DEF_UP_THRESH;
258
259 tp->ztime = TP_DEF_Z_TIME;
260 tp->jenks = TP_DEF_JENKS_CURV;
261
262 tp->inertia = TP_DEF_INERTIA;
263 tp->skipback = TP_DEF_SKIPBACK;
264 tp->ext_dev = TP_DEF_EXT_DEV;
265}
266
267static void trackpoint_disconnect(struct psmouse *psmouse)
268{
269 sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, &trackpoint_attr_group);
270
271 kfree(psmouse->private);
272 psmouse->private = NULL;
273}
274
275static int trackpoint_reconnect(struct psmouse *psmouse)
276{
277 if (trackpoint_start_protocol(psmouse, NULL))
278 return -1;
279
280 if (trackpoint_sync(psmouse))
281 return -1;
282
283 return 0;
284}
285
286int trackpoint_detect(struct psmouse *psmouse, bool set_properties)
287{
288 struct ps2dev *ps2dev = &psmouse->ps2dev;
289 unsigned char firmware_id;
290 unsigned char button_info;
291 int error;
292
293 if (trackpoint_start_protocol(psmouse, &firmware_id))
294 return -1;
295
296 if (!set_properties)
297 return 0;
298
299 if (trackpoint_read(&psmouse->ps2dev, TP_EXT_BTN, &button_info)) {
300 printk(KERN_WARNING "trackpoint.c: failed to get extended button data\n");
301 button_info = 0;
302 }
303
304 psmouse->private = kzalloc(sizeof(struct trackpoint_data), GFP_KERNEL);
305 if (!psmouse->private)
306 return -1;
307
308 psmouse->vendor = "IBM";
309 psmouse->name = "TrackPoint";
310
311 psmouse->reconnect = trackpoint_reconnect;
312 psmouse->disconnect = trackpoint_disconnect;
313
314 if ((button_info & 0x0f) >= 3)
315 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
316
317 trackpoint_defaults(psmouse->private);
318 trackpoint_sync(psmouse);
319
320 error = sysfs_create_group(&ps2dev->serio->dev.kobj, &trackpoint_attr_group);
321 if (error) {
322 printk(KERN_ERR
323 "trackpoint.c: failed to create sysfs attributes, error: %d\n",
324 error);
325 kfree(psmouse->private);
326 psmouse->private = NULL;
327 return -1;
328 }
329
330 printk(KERN_INFO "IBM TrackPoint firmware: 0x%02x, buttons: %d/%d\n",
331 firmware_id, (button_info & 0xf0) >> 4, button_info & 0x0f);
332
333 return 0;
334}
335
generated by cgit v1.2.3 (git 2.39.1) at 2026-09-20 19:49:57 +0000