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elantech.h
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1 /*
2  * Elantech Touchpad driver (v6)
3  *
4  * Copyright (C) 2007-2009 Arjan Opmeer <[email protected]>
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
8  * by the Free Software Foundation.
9  *
10  * Trademarks are the property of their respective owners.
11  */
12 
13 #ifndef _ELANTECH_H
14 #define _ELANTECH_H
15 
16 /*
17  * Command values for Synaptics style queries
18  */
19 #define ETP_FW_ID_QUERY 0x00
20 #define ETP_FW_VERSION_QUERY 0x01
21 #define ETP_CAPABILITIES_QUERY 0x02
22 #define ETP_SAMPLE_QUERY 0x03
23 #define ETP_RESOLUTION_QUERY 0x04
24 
25 /*
26  * Command values for register reading or writing
27  */
28 #define ETP_REGISTER_READ 0x10
29 #define ETP_REGISTER_WRITE 0x11
30 #define ETP_REGISTER_READWRITE 0x00
31 
32 /*
33  * Hardware version 2 custom PS/2 command value
34  */
35 #define ETP_PS2_CUSTOM_COMMAND 0xf8
36 
37 /*
38  * Times to retry a ps2_command and millisecond delay between tries
39  */
40 #define ETP_PS2_COMMAND_TRIES 3
41 #define ETP_PS2_COMMAND_DELAY 500
42 
43 /*
44  * Times to try to read back a register and millisecond delay between tries
45  */
46 #define ETP_READ_BACK_TRIES 5
47 #define ETP_READ_BACK_DELAY 2000
48 
49 /*
50  * Register bitmasks for hardware version 1
51  */
52 #define ETP_R10_ABSOLUTE_MODE 0x04
53 #define ETP_R11_4_BYTE_MODE 0x02
54 
55 /*
56  * Capability bitmasks
57  */
58 #define ETP_CAP_HAS_ROCKER 0x04
59 
60 /*
61  * One hard to find application note states that X axis range is 0 to 576
62  * and Y axis range is 0 to 384 for harware version 1.
63  * Edge fuzz might be necessary because of bezel around the touchpad
64  */
65 #define ETP_EDGE_FUZZ_V1 32
66 
67 #define ETP_XMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1)
68 #define ETP_XMAX_V1 (576 - ETP_EDGE_FUZZ_V1)
69 #define ETP_YMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1)
70 #define ETP_YMAX_V1 (384 - ETP_EDGE_FUZZ_V1)
71 
72 /*
73  * The resolution for older v2 hardware doubled.
74  * (newer v2's firmware provides command so we can query)
75  */
76 #define ETP_XMIN_V2 0
77 #define ETP_XMAX_V2 1152
78 #define ETP_YMIN_V2 0
79 #define ETP_YMAX_V2 768
80 
81 #define ETP_PMIN_V2 0
82 #define ETP_PMAX_V2 255
83 #define ETP_WMIN_V2 0
84 #define ETP_WMAX_V2 15
85 
86 /*
87  * v3 hardware has 2 kinds of packet types,
88  * v4 hardware has 3.
89  */
90 #define PACKET_UNKNOWN 0x01
91 #define PACKET_DEBOUNCE 0x02
92 #define PACKET_V3_HEAD 0x03
93 #define PACKET_V3_TAIL 0x04
94 #define PACKET_V4_HEAD 0x05
95 #define PACKET_V4_MOTION 0x06
96 #define PACKET_V4_STATUS 0x07
97 
98 /*
99  * track up to 5 fingers for v4 hardware
100  */
101 #define ETP_MAX_FINGERS 5
102 
103 /*
104  * weight value for v4 hardware
105  */
106 #define ETP_WEIGHT_VALUE 5
107 
108 /*
109  * The base position for one finger, v4 hardware
110  */
111 struct finger_pos {
112  unsigned int x;
113  unsigned int y;
114 };
115 
117  unsigned char reg_07;
118  unsigned char reg_10;
119  unsigned char reg_11;
120  unsigned char reg_20;
121  unsigned char reg_21;
122  unsigned char reg_22;
123  unsigned char reg_23;
124  unsigned char reg_24;
125  unsigned char reg_25;
126  unsigned char reg_26;
127  unsigned char debug;
128  unsigned char capabilities[3];
132  unsigned char hw_version;
133  unsigned int fw_version;
134  unsigned int single_finger_reports;
135  unsigned int y_max;
136  unsigned int width;
138  unsigned char parity[256];
139  int (*send_cmd)(struct psmouse *psmouse, unsigned char c, unsigned char *param);
140 };
141 
142 #ifdef CONFIG_MOUSE_PS2_ELANTECH
143 int elantech_detect(struct psmouse *psmouse, bool set_properties);
144 int elantech_init(struct psmouse *psmouse);
145 #else
146 static inline int elantech_detect(struct psmouse *psmouse, bool set_properties)
147 {
148  return -ENOSYS;
149 }
150 static inline int elantech_init(struct psmouse *psmouse)
151 {
152  return -ENOSYS;
153 }
154 #endif /* CONFIG_MOUSE_PS2_ELANTECH */
155 
156 #endif