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Diffstat (limited to 'drivers/input/mouse/trackpoint.c')
-rw-r--r--drivers/input/mouse/trackpoint.c304
1 files changed, 304 insertions, 0 deletions
diff --git a/drivers/input/mouse/trackpoint.c b/drivers/input/mouse/trackpoint.c
new file mode 100644
index 000000000000..b4898d8a68e2
--- /dev/null
+++ b/drivers/input/mouse/trackpoint.c
@@ -0,0 +1,304 @@
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/delay.h>
12#include <linux/serio.h>
13#include <linux/module.h>
14#include <linux/moduleparam.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};
72
73static ssize_t trackpoint_show_int_attr(struct psmouse *psmouse, void *data, char *buf)
74{
75 struct trackpoint_data *tp = psmouse->private;
76 struct trackpoint_attr_data *attr = data;
77 unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset);
78
79 return sprintf(buf, "%u\n", *field);
80}
81
82static ssize_t trackpoint_set_int_attr(struct psmouse *psmouse, void *data,
83 const char *buf, size_t count)
84{
85 struct trackpoint_data *tp = psmouse->private;
86 struct trackpoint_attr_data *attr = data;
87 unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset);
88 unsigned long value;
89 char *rest;
90
91 value = simple_strtoul(buf, &rest, 10);
92 if (*rest || value > 255)
93 return -EINVAL;
94
95 *field = value;
96 trackpoint_write(&psmouse->ps2dev, attr->command, value);
97
98 return count;
99}
100
101#define TRACKPOINT_INT_ATTR(_name, _command) \
102 static struct trackpoint_attr_data trackpoint_attr_##_name = { \
103 .field_offset = offsetof(struct trackpoint_data, _name), \
104 .command = _command, \
105 }; \
106 PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
107 &trackpoint_attr_##_name, \
108 trackpoint_show_int_attr, trackpoint_set_int_attr)
109
110static ssize_t trackpoint_set_bit_attr(struct psmouse *psmouse, void *data,
111 const char *buf, size_t count)
112{
113 struct trackpoint_data *tp = psmouse->private;
114 struct trackpoint_attr_data *attr = data;
115 unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset);
116 unsigned long value;
117 char *rest;
118
119 value = simple_strtoul(buf, &rest, 10);
120 if (*rest || value > 1)
121 return -EINVAL;
122
123 if (*field != value) {
124 *field = value;
125 trackpoint_toggle_bit(&psmouse->ps2dev, attr->command, attr->mask);
126 }
127
128 return count;
129}
130
131
132#define TRACKPOINT_BIT_ATTR(_name, _command, _mask) \
133 static struct trackpoint_attr_data trackpoint_attr_##_name = { \
134 .field_offset = offsetof(struct trackpoint_data, _name), \
135 .command = _command, \
136 .mask = _mask, \
137 }; \
138 PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
139 &trackpoint_attr_##_name, \
140 trackpoint_show_int_attr, trackpoint_set_bit_attr)
141
142TRACKPOINT_INT_ATTR(sensitivity, TP_SENS);
143TRACKPOINT_INT_ATTR(speed, TP_SPEED);
144TRACKPOINT_INT_ATTR(inertia, TP_INERTIA);
145TRACKPOINT_INT_ATTR(reach, TP_REACH);
146TRACKPOINT_INT_ATTR(draghys, TP_DRAGHYS);
147TRACKPOINT_INT_ATTR(mindrag, TP_MINDRAG);
148TRACKPOINT_INT_ATTR(thresh, TP_THRESH);
149TRACKPOINT_INT_ATTR(upthresh, TP_UP_THRESH);
150TRACKPOINT_INT_ATTR(ztime, TP_Z_TIME);
151TRACKPOINT_INT_ATTR(jenks, TP_JENKS_CURV);
152
153TRACKPOINT_BIT_ATTR(press_to_select, TP_TOGGLE_PTSON, TP_MASK_PTSON);
154TRACKPOINT_BIT_ATTR(skipback, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK);
155TRACKPOINT_BIT_ATTR(ext_dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV);
156
157static struct attribute *trackpoint_attrs[] = {
158 &psmouse_attr_sensitivity.dattr.attr,
159 &psmouse_attr_speed.dattr.attr,
160 &psmouse_attr_inertia.dattr.attr,
161 &psmouse_attr_reach.dattr.attr,
162 &psmouse_attr_draghys.dattr.attr,
163 &psmouse_attr_mindrag.dattr.attr,
164 &psmouse_attr_thresh.dattr.attr,
165 &psmouse_attr_upthresh.dattr.attr,
166 &psmouse_attr_ztime.dattr.attr,
167 &psmouse_attr_jenks.dattr.attr,
168 &psmouse_attr_press_to_select.dattr.attr,
169 &psmouse_attr_skipback.dattr.attr,
170 &psmouse_attr_ext_dev.dattr.attr,
171 NULL
172};
173
174static struct attribute_group trackpoint_attr_group = {
175 .attrs = trackpoint_attrs,
176};
177
178static void trackpoint_disconnect(struct psmouse *psmouse)
179{
180 sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, &trackpoint_attr_group);
181
182 kfree(psmouse->private);
183 psmouse->private = NULL;
184}
185
186static int trackpoint_sync(struct psmouse *psmouse)
187{
188 unsigned char toggle;
189 struct trackpoint_data *tp = psmouse->private;
190
191 if (!tp)
192 return -1;
193
194 /* Disable features that may make device unusable with this driver */
195 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_TWOHAND, &toggle);
196 if (toggle & TP_MASK_TWOHAND)
197 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_TWOHAND, TP_MASK_TWOHAND);
198
199 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_SOURCE_TAG, &toggle);
200 if (toggle & TP_MASK_SOURCE_TAG)
201 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_SOURCE_TAG, TP_MASK_SOURCE_TAG);
202
203 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_MB, &toggle);
204 if (toggle & TP_MASK_MB)
205 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_MB, TP_MASK_MB);
206
207 /* Push the config to the device */
208 trackpoint_write(&psmouse->ps2dev, TP_SENS, tp->sensitivity);
209 trackpoint_write(&psmouse->ps2dev, TP_INERTIA, tp->inertia);
210 trackpoint_write(&psmouse->ps2dev, TP_SPEED, tp->speed);
211
212 trackpoint_write(&psmouse->ps2dev, TP_REACH, tp->reach);
213 trackpoint_write(&psmouse->ps2dev, TP_DRAGHYS, tp->draghys);
214 trackpoint_write(&psmouse->ps2dev, TP_MINDRAG, tp->mindrag);
215
216 trackpoint_write(&psmouse->ps2dev, TP_THRESH, tp->thresh);
217 trackpoint_write(&psmouse->ps2dev, TP_UP_THRESH, tp->upthresh);
218
219 trackpoint_write(&psmouse->ps2dev, TP_Z_TIME, tp->ztime);
220 trackpoint_write(&psmouse->ps2dev, TP_JENKS_CURV, tp->jenks);
221
222 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_PTSON, &toggle);
223 if (((toggle & TP_MASK_PTSON) == TP_MASK_PTSON) != tp->press_to_select)
224 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_PTSON, TP_MASK_PTSON);
225
226 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_SKIPBACK, &toggle);
227 if (((toggle & TP_MASK_SKIPBACK) == TP_MASK_SKIPBACK) != tp->skipback)
228 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK);
229
230 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_EXT_DEV, &toggle);
231 if (((toggle & TP_MASK_EXT_DEV) == TP_MASK_EXT_DEV) != tp->ext_dev)
232 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV);
233
234 return 0;
235}
236
237static void trackpoint_defaults(struct trackpoint_data *tp)
238{
239 tp->press_to_select = TP_DEF_PTSON;
240 tp->sensitivity = TP_DEF_SENS;
241 tp->speed = TP_DEF_SPEED;
242 tp->reach = TP_DEF_REACH;
243
244 tp->draghys = TP_DEF_DRAGHYS;
245 tp->mindrag = TP_DEF_MINDRAG;
246
247 tp->thresh = TP_DEF_THRESH;
248 tp->upthresh = TP_DEF_UP_THRESH;
249
250 tp->ztime = TP_DEF_Z_TIME;
251 tp->jenks = TP_DEF_JENKS_CURV;
252
253 tp->inertia = TP_DEF_INERTIA;
254 tp->skipback = TP_DEF_SKIPBACK;
255 tp->ext_dev = TP_DEF_EXT_DEV;
256}
257
258int trackpoint_detect(struct psmouse *psmouse, int set_properties)
259{
260 struct trackpoint_data *priv;
261 struct ps2dev *ps2dev = &psmouse->ps2dev;
262 unsigned char firmware_id;
263 unsigned char button_info;
264 unsigned char param[2];
265
266 param[0] = param[1] = 0;
267
268 if (ps2_command(ps2dev, param, MAKE_PS2_CMD(0, 2, TP_READ_ID)))
269 return -1;
270
271 if (param[0] != TP_MAGIC_IDENT)
272 return -1;
273
274 if (!set_properties)
275 return 0;
276
277 firmware_id = param[1];
278
279 if (trackpoint_read(&psmouse->ps2dev, TP_EXT_BTN, &button_info)) {
280 printk(KERN_WARNING "trackpoint.c: failed to get extended button data\n");
281 button_info = 0;
282 }
283
284 psmouse->private = priv = kcalloc(1, sizeof(struct trackpoint_data), GFP_KERNEL);
285 if (!priv)
286 return -1;
287
288 psmouse->vendor = "IBM";
289 psmouse->name = "TrackPoint";
290
291 psmouse->reconnect = trackpoint_sync;
292 psmouse->disconnect = trackpoint_disconnect;
293
294 trackpoint_defaults(priv);
295 trackpoint_sync(psmouse);
296
297 sysfs_create_group(&ps2dev->serio->dev.kobj, &trackpoint_attr_group);
298
299 printk(KERN_INFO "IBM TrackPoint firmware: 0x%02x, buttons: %d/%d\n",
300 firmware_id, (button_info & 0xf0) >> 4, button_info & 0x0f);
301
302 return 0;
303}
304
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