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/* 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; 103 bool paritycheck; 104 bool jumpy_cursor; 105 unsigned char hw_version; 106 unsigned int fw_version; 107 unsigned int single_finger_reports; 108 unsigned char parity[256]; 109}; 110 111#ifdef CONFIG_MOUSE_PS2_ELANTECH 112int elantech_detect(struct psmouse *psmouse, bool set_properties); 113int elantech_init(struct psmouse *psmouse); 114#else 115static inline int elantech_detect(struct psmouse *psmouse, bool set_properties) 116{ 117 return -ENOSYS; 118} 119static inline int elantech_init(struct psmouse *psmouse) 120{ 121 return -ENOSYS; 122} 123#endif /* CONFIG_MOUSE_PS2_ELANTECH */ 124 125#endif 126