2 * Elantech Touchpad driver (v6)
4 * Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net>
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.
10 * Trademarks are the property of their respective owners.
17 * Command values for Synaptics style queries
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
26 * Command values for register reading or writing
28 #define ETP_REGISTER_READ 0x10
29 #define ETP_REGISTER_WRITE 0x11
30 #define ETP_REGISTER_READWRITE 0x00
33 * Hardware version 2 custom PS/2 command value
35 #define ETP_PS2_CUSTOM_COMMAND 0xf8
38 * Times to retry a ps2_command and millisecond delay between tries
40 #define ETP_PS2_COMMAND_TRIES 3
41 #define ETP_PS2_COMMAND_DELAY 500
44 * Times to try to read back a register and millisecond delay between tries
46 #define ETP_READ_BACK_TRIES 5
47 #define ETP_READ_BACK_DELAY 2000
50 * Register bitmasks for hardware version 1
52 #define ETP_R10_ABSOLUTE_MODE 0x04
53 #define ETP_R11_4_BYTE_MODE 0x02
58 #define ETP_CAP_HAS_ROCKER 0x04
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
65 #define ETP_EDGE_FUZZ_V1 32
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)
73 * The resolution for older v2 hardware doubled.
74 * (newer v2's firmware provides command so we can query)
77 #define ETP_XMAX_V2 1152
79 #define ETP_YMAX_V2 768
82 #define ETP_PMAX_V2 255
84 #define ETP_WMAX_V2 15
87 * v3 hardware has 2 kinds of packet types,
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
100 * track up to 5 fingers for v4 hardware
102 #define ETP_MAX_FINGERS 5
105 * weight value for v4 hardware
107 #define ETP_WEIGHT_VALUE 5
110 * The base position for one finger, v4 hardware
117 struct elantech_data
{
118 struct input_dev
*tp_dev
; /* Relative device for trackpoint */
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
;
131 unsigned char capabilities
[3];
132 unsigned char samples
[3];
135 bool reports_pressure
;
137 bool set_hw_resolution
;
138 unsigned char hw_version
;
139 unsigned int fw_version
;
140 unsigned int single_finger_reports
;
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
);
149 #ifdef CONFIG_MOUSE_PS2_ELANTECH
150 int elantech_detect(struct psmouse
*psmouse
, bool set_properties
);
151 int elantech_init(struct psmouse
*psmouse
);
153 static inline int elantech_detect(struct psmouse
*psmouse
, bool set_properties
)
157 static inline int elantech_init(struct psmouse
*psmouse
)
161 #endif /* CONFIG_MOUSE_PS2_ELANTECH */