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1 | /* | |
2 | * Elantech Touchpad driver (v6) | |
3 | * | |
4 | * Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net> | |
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 | #define PACKET_TRACKPOINT 0x08 | |
98 | ||
99 | /* | |
100 | * track up to 5 fingers for v4 hardware | |
101 | */ | |
102 | #define ETP_MAX_FINGERS 5 | |
103 | ||
104 | /* | |
105 | * weight value for v4 hardware | |
106 | */ | |
107 | #define ETP_WEIGHT_VALUE 5 | |
108 | ||
109 | /* | |
110 | * The base position for one finger, v4 hardware | |
111 | */ | |
112 | struct finger_pos { | |
113 | unsigned int x; | |
114 | unsigned int y; | |
115 | }; | |
116 | ||
117 | struct elantech_data { | |
118 | struct input_dev *tp_dev; /* Relative device for trackpoint */ | |
119 | char tp_phys[32]; | |
120 | unsigned char reg_07; | |
121 | unsigned char reg_10; | |
122 | unsigned char reg_11; | |
123 | unsigned char reg_20; | |
124 | unsigned char reg_21; | |
125 | unsigned char reg_22; | |
126 | unsigned char reg_23; | |
127 | unsigned char reg_24; | |
128 | unsigned char reg_25; | |
129 | unsigned char reg_26; | |
130 | unsigned char debug; | |
131 | unsigned char capabilities[3]; | |
132 | unsigned char samples[3]; | |
133 | bool paritycheck; | |
134 | bool jumpy_cursor; | |
135 | bool reports_pressure; | |
136 | bool crc_enabled; | |
137 | bool set_hw_resolution; | |
138 | unsigned char hw_version; | |
139 | unsigned int fw_version; | |
140 | unsigned int single_finger_reports; | |
141 | unsigned int y_max; | |
142 | unsigned int width; | |
143 | struct finger_pos mt[ETP_MAX_FINGERS]; | |
144 | unsigned char parity[256]; | |
145 | int (*send_cmd)(struct psmouse *psmouse, unsigned char c, unsigned char *param); | |
146 | void (*original_set_rate)(struct psmouse *psmouse, unsigned int rate); | |
147 | }; | |
148 | ||
149 | #ifdef CONFIG_MOUSE_PS2_ELANTECH | |
150 | int elantech_detect(struct psmouse *psmouse, bool set_properties); | |
151 | int elantech_init(struct psmouse *psmouse); | |
152 | #else | |
153 | static inline int elantech_detect(struct psmouse *psmouse, bool set_properties) | |
154 | { | |
155 | return -ENOSYS; | |
156 | } | |
157 | static inline int elantech_init(struct psmouse *psmouse) | |
158 | { | |
159 | return -ENOSYS; | |
160 | } | |
161 | #endif /* CONFIG_MOUSE_PS2_ELANTECH */ | |
162 | ||
163 | #endif |