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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_VERSION_QUERY 0x01
20#define ETP_CAPABILITIES_QUERY 0x02
21
22/*
23 * Command values for register reading or writing
24 */
25#define ETP_REGISTER_READ 0x10
26#define ETP_REGISTER_WRITE 0x11
27
28/*
29 * Hardware version 2 custom PS/2 command value
30 */
31#define ETP_PS2_CUSTOM_COMMAND 0xf8
32
33/*
34 * Times to retry a ps2_command and millisecond delay between tries
35 */
36#define ETP_PS2_COMMAND_TRIES 3
37#define ETP_PS2_COMMAND_DELAY 500
38
39/*
40 * Times to try to read back a register and millisecond delay between tries
41 */
42#define ETP_READ_BACK_TRIES 5
43#define ETP_READ_BACK_DELAY 2000
44
45/*
46 * Register bitmasks for hardware version 1
47 */
48#define ETP_R10_ABSOLUTE_MODE 0x04
49#define ETP_R11_4_BYTE_MODE 0x02
50
51/*
52 * Capability bitmasks
53 */
54#define ETP_CAP_HAS_ROCKER 0x04
55
56/*
57 * One hard to find application note states that X axis range is 0 to 576
58 * and Y axis range is 0 to 384 for harware version 1.
59 * Edge fuzz might be necessary because of bezel around the touchpad
60 */
61#define ETP_EDGE_FUZZ_V1 32
62
63#define ETP_XMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1)
64#define ETP_XMAX_V1 (576 - ETP_EDGE_FUZZ_V1)
65#define ETP_YMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1)
66#define ETP_YMAX_V1 (384 - ETP_EDGE_FUZZ_V1)
67
68/*
69 * It seems the resolution for hardware version 2 doubled.
70 * Hence the X and Y ranges are doubled too.
71 * The bezel around the pad also appears to be smaller
72 */
73#define ETP_EDGE_FUZZ_V2 8
74
75#define ETP_XMIN_V2 ( 0 + ETP_EDGE_FUZZ_V2)
76#define ETP_XMAX_V2 (1152 - ETP_EDGE_FUZZ_V2)
77#define ETP_YMIN_V2 ( 0 + ETP_EDGE_FUZZ_V2)
78#define ETP_YMAX_V2 ( 768 - ETP_EDGE_FUZZ_V2)
79
80#define ETP_PMIN_V2 0
81#define ETP_PMAX_V2 255
82#define ETP_WMIN_V2 0
83#define ETP_WMAX_V2 15
84
85/*
86 * For two finger touches the coordinate of each finger gets reported
87 * separately but with reduced resolution.
88 */
89#define ETP_2FT_FUZZ 4
90
91#define ETP_2FT_XMIN ( 0 + ETP_2FT_FUZZ)
92#define ETP_2FT_XMAX (288 - ETP_2FT_FUZZ)
93#define ETP_2FT_YMIN ( 0 + ETP_2FT_FUZZ)
94#define ETP_2FT_YMAX (192 - ETP_2FT_FUZZ)
95
96struct elantech_data {
97 unsigned char reg_10;
98 unsigned char reg_11;
99 unsigned char reg_20;
100 unsigned char reg_21;
101 unsigned char reg_22;
102 unsigned char reg_23;
103 unsigned char reg_24;
104 unsigned char reg_25;
105 unsigned char reg_26;
106 unsigned char debug;
107 unsigned char capabilities;
108 bool paritycheck;
109 bool jumpy_cursor;
110 bool reports_pressure;
111 unsigned char hw_version;
112 unsigned int fw_version;
113 unsigned int single_finger_reports;
114 unsigned char parity[256];
115};
116
117#ifdef CONFIG_MOUSE_PS2_ELANTECH
118int elantech_detect(struct psmouse *psmouse, bool set_properties);
119int elantech_init(struct psmouse *psmouse);
120#else
121static inline int elantech_detect(struct psmouse *psmouse, bool set_properties)
122{
123 return -ENOSYS;
124}
125static inline int elantech_init(struct psmouse *psmouse)
126{
127 return -ENOSYS;
128}
129#endif /* CONFIG_MOUSE_PS2_ELANTECH */
130
131#endif
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 */
112struct finger_pos {
113 unsigned int x;
114 unsigned int y;
115};
116
117struct 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
150int elantech_detect(struct psmouse *psmouse, bool set_properties);
151int elantech_init(struct psmouse *psmouse);
152#else
153static inline int elantech_detect(struct psmouse *psmouse, bool set_properties)
154{
155 return -ENOSYS;
156}
157static inline int elantech_init(struct psmouse *psmouse)
158{
159 return -ENOSYS;
160}
161#endif /* CONFIG_MOUSE_PS2_ELANTECH */
162
163#endif