summaryrefslogtreecommitdiffstats
path: root/drivers/input/mouse/trackpoint.h
blob: 10a0391482343d4ba482336367b204cf64f6e47c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
/*
 * IBM TrackPoint PS/2 mouse driver
 *
 * Stephen Evanchik <evanchsa@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */

#ifndef _TRACKPOINT_H
#define _TRACKPOINT_H

/*
 * These constants are from the TrackPoint System
 * Engineering documentation Version 4 from IBM Watson
 * research:
 *	http://wwwcssrv.almaden.ibm.com/trackpoint/download.html
 */

#define TP_COMMAND		0xE2	/* Commands start with this */

#define TP_READ_ID		0xE1	/* Sent for device identification */

/*
 * Valid first byte responses to the "Read Secondary ID" (0xE1) command.
 * 0x01 was the original IBM trackpoint, others implement very limited
 * subset of trackpoint features.
 */
#define TP_VARIANT_IBM		0x01
#define TP_VARIANT_ALPS		0x02
#define TP_VARIANT_ELAN		0x03
#define TP_VARIANT_NXP		0x04

/*
 * Commands
 */
#define TP_RECALIB		0x51	/* Recalibrate */
#define TP_POWER_DOWN		0x44	/* Can only be undone through HW reset */
#define TP_EXT_DEV		0x21	/* Determines if external device is connected (RO) */
#define TP_EXT_BTN		0x4B	/* Read extended button status */
#define TP_POR			0x7F	/* Execute Power on Reset */
#define TP_POR_RESULTS		0x25	/* Read Power on Self test results */
#define TP_DISABLE_EXT		0x40	/* Disable external pointing device */
#define TP_ENABLE_EXT		0x41	/* Enable external pointing device */

/*
 * Mode manipulation
 */
#define TP_SET_SOFT_TRANS	0x4E	/* Set mode */
#define TP_CANCEL_SOFT_TRANS	0xB9	/* Cancel mode */
#define TP_SET_HARD_TRANS	0x45	/* Mode can only be set */


/*
 * Register oriented commands/properties
 */
#define TP_WRITE_MEM		0x81
#define TP_READ_MEM		0x80	/* Not used in this implementation */

/*
* RAM Locations for properties
 */
#define TP_SENS			0x4A	/* Sensitivity */
#define TP_MB			0x4C	/* Read Middle Button Status (RO) */
#define TP_INERTIA		0x4D	/* Negative Inertia */
#define TP_SPEED		0x60	/* Speed of TP Cursor */
#define TP_REACH		0x57	/* Backup for Z-axis press */
#define TP_DRAGHYS		0x58	/* Drag Hysteresis */
					/* (how hard it is to drag */
					/* with Z-axis pressed) */

#define TP_MINDRAG		0x59	/* Minimum amount of force needed */
					/* to trigger dragging */

#define TP_THRESH		0x5C	/* Minimum value for a Z-axis press */
#define TP_UP_THRESH		0x5A	/* Used to generate a 'click' on Z-axis */
#define TP_Z_TIME		0x5E	/* How sharp of a press */
#define TP_JENKS_CURV		0x5D	/* Minimum curvature for double click */
#define TP_DRIFT_TIME		0x5F	/* How long a 'hands off' condition */
					/* must last (x*107ms) for drift */
					/* correction to occur */

/*
 * Toggling Flag bits
 */
#define TP_TOGGLE		0x47	/* Toggle command */

#define TP_TOGGLE_MB		0x23	/* Disable/Enable Middle Button */
#define TP_MASK_MB			0x01
#define TP_TOGGLE_EXT_DEV	0x23	/* Disable external device */
#define TP_MASK_EXT_DEV			0x02
#define TP_TOGGLE_DRIFT		0x23	/* Drift Correction */
#define TP_MASK_DRIFT			0x80
#define TP_TOGGLE_BURST		0x28	/* Burst Mode */
#define TP_MASK_BURST			0x80
#define TP_TOGGLE_PTSON		0x2C	/* Press to Select */
#define TP_MASK_PTSON			0x01
#define TP_TOGGLE_HARD_TRANS	0x2C	/* Alternate method to set Hard Transparency */
#define TP_MASK_HARD_TRANS		0x80
#define TP_TOGGLE_TWOHAND	0x2D	/* Two handed */
#define TP_MASK_TWOHAND			0x01
#define TP_TOGGLE_STICKY_TWO	0x2D	/* Sticky two handed */
#define TP_MASK_STICKY_TWO		0x04
#define TP_TOGGLE_SKIPBACK	0x2D	/* Suppress movement after drag release */
#define TP_MASK_SKIPBACK		0x08
#define TP_TOGGLE_SOURCE_TAG	0x20	/* Bit 3 of the first packet will be set to
					   to the origin of the packet (external or TP) */
#define TP_MASK_SOURCE_TAG		0x80
#define TP_TOGGLE_EXT_TAG	0x22	/* Bit 3 of the first packet coming from the
					   external device will be forced to 1 */
#define TP_MASK_EXT_TAG			0x04


/* Power on Self Test Results */
#define TP_POR_SUCCESS		0x3B

/*
 * Default power on values
 */
#define TP_DEF_SENS		0x80
#define TP_DEF_INERTIA		0x06
#define TP_DEF_SPEED		0x61
#define TP_DEF_REACH		0x0A

#define TP_DEF_DRAGHYS		0xFF
#define TP_DEF_MINDRAG		0x14

#define TP_DEF_THRESH		0x08
#define TP_DEF_UP_THRESH	0xFF
#define TP_DEF_Z_TIME		0x26
#define TP_DEF_JENKS_CURV	0x87
#define TP_DEF_DRIFT_TIME	0x05

/* Toggles */
#define TP_DEF_MB		0x00
#define TP_DEF_PTSON		0x00
#define TP_DEF_SKIPBACK		0x00
#define TP_DEF_EXT_DEV		0x00	/* 0 means enabled */
#define TP_DEF_TWOHAND		0x00
#define TP_DEF_SOURCE_TAG	0x00

#define MAKE_PS2_CMD(params, results, cmd) ((params<<12) | (results<<8) | (cmd))

struct trackpoint_data {
	u8 variant_id;
	u8 firmware_id;

	u8 sensitivity, speed, inertia, reach;
	u8 draghys, mindrag;
	u8 thresh, upthresh;
	u8 ztime, jenks;
	u8 drift_time;

	/* toggles */
	bool press_to_select;
	bool skipback;
	bool ext_dev;
};

#ifdef CONFIG_MOUSE_PS2_TRACKPOINT
int trackpoint_detect(struct psmouse *psmouse, bool set_properties);
#else
inline int trackpoint_detect(struct psmouse *psmouse, bool set_properties)
{
	return -ENOSYS;
}
#endif /* CONFIG_MOUSE_PS2_TRACKPOINT */

#endif /* _TRACKPOINT_H */