2 * Elantech Touchpad driver (v5)
4 * Copyright (C) 2007-2008 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_VERSION_QUERY 0x01
20 #define ETP_CAPABILITIES_QUERY 0x02
23 * Command values for register reading or writing
25 #define ETP_REGISTER_READ 0x10
26 #define ETP_REGISTER_WRITE 0x11
29 * Hardware version 2 custom PS/2 command value
31 #define ETP_PS2_CUSTOM_COMMAND 0xf8
34 * Times to retry a ps2_command and millisecond delay between tries
36 #define ETP_PS2_COMMAND_TRIES 3
37 #define ETP_PS2_COMMAND_DELAY 500
40 * Times to try to read back a register and millisecond delay between tries
42 #define ETP_READ_BACK_TRIES 5
43 #define ETP_READ_BACK_DELAY 2000
46 * Register bitmasks for hardware version 1
48 #define ETP_R10_ABSOLUTE_MODE 0x04
49 #define ETP_R11_4_BYTE_MODE 0x02
54 #define ETP_CAP_HAS_ROCKER 0x04
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
61 #define ETP_EDGE_FUZZ_V1 32
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)
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
73 #define ETP_EDGE_FUZZ_V2 8
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)
81 * For two finger touches the coordinate of each finger gets reported
82 * separately but with reduced resolution.
84 #define ETP_2FT_FUZZ 4
86 #define ETP_2FT_XMIN ( 0 + ETP_2FT_FUZZ)
87 #define ETP_2FT_XMAX (288 - ETP_2FT_FUZZ)
88 #define ETP_2FT_YMIN ( 0 + ETP_2FT_FUZZ)
89 #define ETP_2FT_YMAX (192 - ETP_2FT_FUZZ)
91 struct elantech_data {
100 unsigned char reg_26;
102 unsigned char capabilities;
103 unsigned char fw_version_maj;
104 unsigned char fw_version_min;
105 unsigned char hw_version;
106 unsigned char paritycheck;
107 unsigned char parity[256];
110 #ifdef CONFIG_MOUSE_PS2_ELANTECH
111 int elantech_detect(struct psmouse *psmouse, int set_properties);
112 int elantech_init(struct psmouse *psmouse);
114 static inline int elantech_detect(struct psmouse *psmouse, int set_properties)
118 static inline int elantech_init(struct psmouse *psmouse)
122 #endif /* CONFIG_MOUSE_PS2_ELANTECH */