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gerrit-public.fairphone.software / kernel / msm-4.9 / 42de5532f4a58a52a60bdd8bd4f80f9f210dd65b / . / drivers / input / mouse / elantech.h
blob: ac57bde1bb9f3e62fb3b891227521f0b63df3946 [file] [log] [blame]
Arjan Opmeer2a0bd752008-10-16 22:10:19 -0400[diff] [blame]1/*
Arjan Opmeer3f8c0df2009-04-18 19:05:40 -0700[diff] [blame]2 * Elantech Touchpad driver (v6)
Arjan Opmeer2a0bd752008-10-16 22:10:19 -0400[diff] [blame]3 *
Arjan Opmeer3f8c0df2009-04-18 19:05:40 -0700[diff] [blame]4 * Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net>
Arjan Opmeer2a0bd752008-10-16 22:10:19 -0400[diff] [blame]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/*
81 * For two finger touches the coordinate of each finger gets reported
82 * separately but with reduced resolution.
83 */
84#define ETP_2FT_FUZZ 4
85
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)
90
91struct elantech_data {
92 unsigned char reg_10;
93 unsigned char reg_11;
94 unsigned char reg_20;
95 unsigned char reg_21;
96 unsigned char reg_22;
97 unsigned char reg_23;
98 unsigned char reg_24;
99 unsigned char reg_25;
100 unsigned char reg_26;
101 unsigned char debug;
102 unsigned char capabilities;
Arjan Opmeer2a0bd752008-10-16 22:10:19 -0400[diff] [blame]103 unsigned char paritycheck;
Arjan Opmeer3f8c0df2009-04-18 19:05:40 -0700[diff] [blame]104 unsigned char jumpy_cursor;
Dmitry Torokhov504e8be2010-05-13 00:41:15 -0700[diff] [blame]105 unsigned char hw_version;
106 unsigned int fw_version;
Arjan Opmeer2a0bd752008-10-16 22:10:19 -0400[diff] [blame]107 unsigned char parity[256];
108};
109
110#ifdef CONFIG_MOUSE_PS2_ELANTECH
Dmitry Torokhovb7802c52009-09-09 19:13:20 -0700[diff] [blame]111int elantech_detect(struct psmouse *psmouse, bool set_properties);
Arjan Opmeer2a0bd752008-10-16 22:10:19 -0400[diff] [blame]112int elantech_init(struct psmouse *psmouse);
113#else
Dmitry Torokhovb7802c52009-09-09 19:13:20 -0700[diff] [blame]114static inline int elantech_detect(struct psmouse *psmouse, bool set_properties)
Arjan Opmeer2a0bd752008-10-16 22:10:19 -0400[diff] [blame]115{
116 return -ENOSYS;
117}
118static inline int elantech_init(struct psmouse *psmouse)
119{
120 return -ENOSYS;
121}
122#endif /* CONFIG_MOUSE_PS2_ELANTECH */
123
124#endif