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 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 paritycheck; 104 unsigned char jumpy_cursor; 105 unsigned char hw_version; 106 unsigned int fw_version; 107 unsigned char parity[256]; 108 }; 109 110 #ifdef CONFIG_MOUSE_PS2_ELANTECH 111 int elantech_detect(struct psmouse *psmouse, bool set_properties); 112 int elantech_init(struct psmouse *psmouse); 113 #else 114 static inline int elantech_detect(struct psmouse *psmouse, bool 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 125