1 /*
2 * IBM TrackPoint PS/2 mouse driver
3 *
4 * Stephen Evanchik <evanchsa@gmail.com>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published by
8 * the Free Software Foundation.
9 */
10
11 #ifndef _TRACKPOINT_H
12 #define _TRACKPOINT_H
13
14 /*
15 * These constants are from the TrackPoint System
16 * Engineering documentation Version 4 from IBM Watson
17 * research:
18 * http://wwwcssrv.almaden.ibm.com/trackpoint/download.html
19 */
20
21 #define TP_COMMAND 0xE2 /* Commands start with this */
22
23 #define TP_READ_ID 0xE1 /* Sent for device identification */
24 #define TP_MAGIC_IDENT 0x01 /* Sent after a TP_READ_ID followed */
25 /* by the firmware ID */
26
27
28 /*
29 * Commands
30 */
31 #define TP_RECALIB 0x51 /* Recalibrate */
32 #define TP_POWER_DOWN 0x44 /* Can only be undone through HW reset */
33 #define TP_EXT_DEV 0x21 /* Determines if external device is connected (RO) */
34 #define TP_EXT_BTN 0x4B /* Read extended button status */
35 #define TP_POR 0x7F /* Execute Power on Reset */
36 #define TP_POR_RESULTS 0x25 /* Read Power on Self test results */
37 #define TP_DISABLE_EXT 0x40 /* Disable external pointing device */
38 #define TP_ENABLE_EXT 0x41 /* Enable external pointing device */
39
40 /*
41 * Mode manipulation
42 */
43 #define TP_SET_SOFT_TRANS 0x4E /* Set mode */
44 #define TP_CANCEL_SOFT_TRANS 0xB9 /* Cancel mode */
45 #define TP_SET_HARD_TRANS 0x45 /* Mode can only be set */
46
47
48 /*
49 * Register oriented commands/properties
50 */
51 #define TP_WRITE_MEM 0x81
52 #define TP_READ_MEM 0x80 /* Not used in this implementation */
53
54 /*
55 * RAM Locations for properties
56 */
57 #define TP_SENS 0x4A /* Sensitivity */
58 #define TP_MB 0x4C /* Read Middle Button Status (RO) */
59 #define TP_INERTIA 0x4D /* Negative Inertia */
60 #define TP_SPEED 0x60 /* Speed of TP Cursor */
61 #define TP_REACH 0x57 /* Backup for Z-axis press */
62 #define TP_DRAGHYS 0x58 /* Drag Hysteresis */
63 /* (how hard it is to drag */
64 /* with Z-axis pressed) */
65
66 #define TP_MINDRAG 0x59 /* Minimum amount of force needed */
67 /* to trigger dragging */
68
69 #define TP_THRESH 0x5C /* Minimum value for a Z-axis press */
70 #define TP_UP_THRESH 0x5A /* Used to generate a 'click' on Z-axis */
71 #define TP_Z_TIME 0x5E /* How sharp of a press */
72 #define TP_JENKS_CURV 0x5D /* Minimum curvature for double click */
73
74 /*
75 * Toggling Flag bits
76 */
77 #define TP_TOGGLE 0x47 /* Toggle command */
78
79 #define TP_TOGGLE_MB 0x23 /* Disable/Enable Middle Button */
80 #define TP_MASK_MB 0x01
81 #define TP_TOGGLE_EXT_DEV 0x23 /* Disable external device */
82 #define TP_MASK_EXT_DEV 0x02
83 #define TP_TOGGLE_DRIFT 0x23 /* Drift Correction */
84 #define TP_MASK_DRIFT 0x80
85 #define TP_TOGGLE_BURST 0x28 /* Burst Mode */
86 #define TP_MASK_BURST 0x80
87 #define TP_TOGGLE_PTSON 0x2C /* Press to Select */
88 #define TP_MASK_PTSON 0x01
89 #define TP_TOGGLE_HARD_TRANS 0x2C /* Alternate method to set Hard Transparency */
90 #define TP_MASK_HARD_TRANS 0x80
91 #define TP_TOGGLE_TWOHAND 0x2D /* Two handed */
92 #define TP_MASK_TWOHAND 0x01
93 #define TP_TOGGLE_STICKY_TWO 0x2D /* Sticky two handed */
94 #define TP_MASK_STICKY_TWO 0x04
95 #define TP_TOGGLE_SKIPBACK 0x2D /* Suppress movement after drag release */
96 #define TP_MASK_SKIPBACK 0x08
97 #define TP_TOGGLE_SOURCE_TAG 0x20 /* Bit 3 of the first packet will be set to
98 to the origin of the packet (external or TP) */
99 #define TP_MASK_SOURCE_TAG 0x80
100 #define TP_TOGGLE_EXT_TAG 0x22 /* Bit 3 of the first packet coming from the
101 external device will be forced to 1 */
102 #define TP_MASK_EXT_TAG 0x04
103
104
105 /* Power on Self Test Results */
106 #define TP_POR_SUCCESS 0x3B
107
108 /*
109 * Default power on values
110 */
111 #define TP_DEF_SENS 0x80
112 #define TP_DEF_INERTIA 0x06
113 #define TP_DEF_SPEED 0x61
114 #define TP_DEF_REACH 0x0A
115
116 #define TP_DEF_DRAGHYS 0xFF
117 #define TP_DEF_MINDRAG 0x14
118
119 #define TP_DEF_THRESH 0x08
120 #define TP_DEF_UP_THRESH 0xFF
121 #define TP_DEF_Z_TIME 0x26
122 #define TP_DEF_JENKS_CURV 0x87
123
124 /* Toggles */
125 #define TP_DEF_MB 0x00
126 #define TP_DEF_PTSON 0x00
127 #define TP_DEF_SKIPBACK 0x00
128 #define TP_DEF_EXT_DEV 0x00 /* 0 means enabled */
129
130 #define MAKE_PS2_CMD(params, results, cmd) ((params<<12) | (results<<8) | (cmd))
131
132 struct trackpoint_data
133 {
134 unsigned char sensitivity, speed, inertia, reach;
135 unsigned char draghys, mindrag;
136 unsigned char thresh, upthresh;
137 unsigned char ztime, jenks;
138
139 unsigned char press_to_select;
140 unsigned char skipback;
141
142 unsigned char ext_dev;
143 };
144
145 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT
146 int trackpoint_detect(struct psmouse *psmouse, int set_properties);
147 #else
148 inline int trackpoint_detect(struct psmouse *psmouse, int set_properties)
149 {
150 return -ENOSYS;
151 }
152 #endif /* CONFIG_MOUSE_PS2_TRACKPOINT */
153
154 #endif /* _TRACKPOINT_H */
155
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