| Arjan Opmeer | 2a0bd75 | 2008-10-16 22:10:19 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Elantech Touchpad driver (v5) |
| 3 | * |
| 4 | * Copyright (C) 2007-2008 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 | /* |
| 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 | |
| 91 | struct 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; |
| 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]; |
| 108 | }; |
| 109 | |
| 110 | #ifdef CONFIG_MOUSE_PS2_ELANTECH |
| 111 | int elantech_detect(struct psmouse *psmouse, int set_properties); |
| 112 | int elantech_init(struct psmouse *psmouse); |
| 113 | #else |
| 114 | static inline int elantech_detect(struct psmouse *psmouse, int set_properties) |
| 115 | { |
| 116 | return -ENOSYS; |
| 117 | } |
| 118 | static inline int elantech_init(struct psmouse *psmouse) |
| 119 | { |
| 120 | return -ENOSYS; |
| 121 | } |
| 122 | #endif /* CONFIG_MOUSE_PS2_ELANTECH */ |
| 123 | |
| 124 | #endif |