summaryrefslogtreecommitdiff
path: root/drivers/input/mouse/elantech.h
blob: 9e5f1aabea7e92c2abc48fe7de380c17279873be (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
/*
 * Elantech Touchpad driver (v6)
 *
 * Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net>
 *
 * 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.
 *
 * Trademarks are the property of their respective owners.
 */

#ifndef _ELANTECH_H
#define _ELANTECH_H

/*
 * Command values for Synaptics style queries
 */
#define ETP_FW_ID_QUERY			0x00
#define ETP_FW_VERSION_QUERY		0x01
#define ETP_CAPABILITIES_QUERY		0x02
#define ETP_SAMPLE_QUERY		0x03

/*
 * Command values for register reading or writing
 */
#define ETP_REGISTER_READ		0x10
#define ETP_REGISTER_WRITE		0x11
#define ETP_REGISTER_READWRITE		0x00

/*
 * Hardware version 2 custom PS/2 command value
 */
#define ETP_PS2_CUSTOM_COMMAND		0xf8

/*
 * Times to retry a ps2_command and millisecond delay between tries
 */
#define ETP_PS2_COMMAND_TRIES		3
#define ETP_PS2_COMMAND_DELAY		500

/*
 * Times to try to read back a register and millisecond delay between tries
 */
#define ETP_READ_BACK_TRIES		5
#define ETP_READ_BACK_DELAY		2000

/*
 * Register bitmasks for hardware version 1
 */
#define ETP_R10_ABSOLUTE_MODE		0x04
#define ETP_R11_4_BYTE_MODE		0x02

/*
 * Capability bitmasks
 */
#define ETP_CAP_HAS_ROCKER		0x04

/*
 * One hard to find application note states that X axis range is 0 to 576
 * and Y axis range is 0 to 384 for harware version 1.
 * Edge fuzz might be necessary because of bezel around the touchpad
 */
#define ETP_EDGE_FUZZ_V1		32

#define ETP_XMIN_V1			(  0 + ETP_EDGE_FUZZ_V1)
#define ETP_XMAX_V1			(576 - ETP_EDGE_FUZZ_V1)
#define ETP_YMIN_V1			(  0 + ETP_EDGE_FUZZ_V1)
#define ETP_YMAX_V1			(384 - ETP_EDGE_FUZZ_V1)

/*
 * The resolution for older v2 hardware doubled.
 * (newer v2's firmware provides command so we can query)
 */
#define ETP_XMIN_V2			0
#define ETP_XMAX_V2			1152
#define ETP_YMIN_V2			0
#define ETP_YMAX_V2			768

#define ETP_PMIN_V2			0
#define ETP_PMAX_V2			255
#define ETP_WMIN_V2			0
#define ETP_WMAX_V2			15

/*
 * v3 hardware has 2 kinds of packet types,
 * v4 hardware has 3.
 */
#define PACKET_UNKNOWN			0x01
#define PACKET_DEBOUNCE			0x02
#define PACKET_V3_HEAD			0x03
#define PACKET_V3_TAIL			0x04
#define PACKET_V4_HEAD			0x05
#define PACKET_V4_MOTION		0x06
#define PACKET_V4_STATUS		0x07

/*
 * track up to 5 fingers for v4 hardware
 */
#define ETP_MAX_FINGERS			5

/*
 * weight value for v4 hardware
 */
#define ETP_WEIGHT_VALUE		5

/*
 * The base position for one finger, v4 hardware
 */
struct finger_pos {
	unsigned int x;
	unsigned int y;
};

struct elantech_data {
	unsigned char reg_07;
	unsigned char reg_10;
	unsigned char reg_11;
	unsigned char reg_20;
	unsigned char reg_21;
	unsigned char reg_22;
	unsigned char reg_23;
	unsigned char reg_24;
	unsigned char reg_25;
	unsigned char reg_26;
	unsigned char debug;
	unsigned char capabilities[3];
	bool paritycheck;
	bool jumpy_cursor;
	bool reports_pressure;
	unsigned char hw_version;
	unsigned int fw_version;
	unsigned int single_finger_reports;
	unsigned int y_max;
	unsigned int width;
	struct finger_pos mt[ETP_MAX_FINGERS];
	unsigned char parity[256];
};

#ifdef CONFIG_MOUSE_PS2_ELANTECH
int elantech_detect(struct psmouse *psmouse, bool set_properties);
int elantech_init(struct psmouse *psmouse);
#else
static inline int elantech_detect(struct psmouse *psmouse, bool set_properties)
{
	return -ENOSYS;
}
static inline int elantech_init(struct psmouse *psmouse)
{
	return -ENOSYS;
}
#endif /* CONFIG_MOUSE_PS2_ELANTECH */

#endif