Input: rework psmouse attributes to reduce module size
[linux-2.6.git] / drivers / input / mouse / trackpoint.c
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  */
25 static 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
35 static 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
47 static 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  */
67 struct trackpoint_attr_data {
68         size_t field_offset;
69         unsigned char command;
70         unsigned char mask;
71 };
72
73 static 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
82 static 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
110 static 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
142 TRACKPOINT_INT_ATTR(sensitivity, TP_SENS);
143 TRACKPOINT_INT_ATTR(speed, TP_SPEED);
144 TRACKPOINT_INT_ATTR(inertia, TP_INERTIA);
145 TRACKPOINT_INT_ATTR(reach, TP_REACH);
146 TRACKPOINT_INT_ATTR(draghys, TP_DRAGHYS);
147 TRACKPOINT_INT_ATTR(mindrag, TP_MINDRAG);
148 TRACKPOINT_INT_ATTR(thresh, TP_THRESH);
149 TRACKPOINT_INT_ATTR(upthresh, TP_UP_THRESH);
150 TRACKPOINT_INT_ATTR(ztime, TP_Z_TIME);
151 TRACKPOINT_INT_ATTR(jenks, TP_JENKS_CURV);
152
153 TRACKPOINT_BIT_ATTR(press_to_select, TP_TOGGLE_PTSON, TP_MASK_PTSON);
154 TRACKPOINT_BIT_ATTR(skipback, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK);
155 TRACKPOINT_BIT_ATTR(ext_dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV);
156
157 static 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
174 static struct attribute_group trackpoint_attr_group = {
175         .attrs = trackpoint_attrs,
176 };
177
178 static 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
186 static 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
237 static 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
258 int 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