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_ID_QUERY 0x00 20 #define ETP_FW_VERSION_QUERY 0x01 21 #define ETP_CAPABILITIES_QUERY 0x02 22 #define ETP_SAMPLE_QUERY 0x03 23 24 /* 25 * Command values for register reading or writing 26 */ 27 #define ETP_REGISTER_READ 0x10 28 #define ETP_REGISTER_WRITE 0x11 29 #define ETP_REGISTER_READWRITE 0x00 30 31 /* 32 * Hardware version 2 custom PS/2 command value 33 */ 34 #define ETP_PS2_CUSTOM_COMMAND 0xf8 35 36 /* 37 * Times to retry a ps2_command and millisecond delay between tries 38 */ 39 #define ETP_PS2_COMMAND_TRIES 3 40 #define ETP_PS2_COMMAND_DELAY 500 41 42 /* 43 * Times to try to read back a register and millisecond delay between tries 44 */ 45 #define ETP_READ_BACK_TRIES 5 46 #define ETP_READ_BACK_DELAY 2000 47 48 /* 49 * Register bitmasks for hardware version 1 50 */ 51 #define ETP_R10_ABSOLUTE_MODE 0x04 52 #define ETP_R11_4_BYTE_MODE 0x02 53 54 /* 55 * Capability bitmasks 56 */ 57 #define ETP_CAP_HAS_ROCKER 0x04 58 59 /* 60 * One hard to find application note states that X axis range is 0 to 576 61 * and Y axis range is 0 to 384 for harware version 1. 62 * Edge fuzz might be necessary because of bezel around the touchpad 63 */ 64 #define ETP_EDGE_FUZZ_V1 32 65 66 #define ETP_XMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1) 67 #define ETP_XMAX_V1 (576 - ETP_EDGE_FUZZ_V1) 68 #define ETP_YMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1) 69 #define ETP_YMAX_V1 (384 - ETP_EDGE_FUZZ_V1) 70 71 /* 72 * The resolution for older v2 hardware doubled. 73 * (newer v2's firmware provides command so we can query) 74 */ 75 #define ETP_XMIN_V2 0 76 #define ETP_XMAX_V2 1152 77 #define ETP_YMIN_V2 0 78 #define ETP_YMAX_V2 768 79 80 #define ETP_PMIN_V2 0 81 #define ETP_PMAX_V2 255 82 #define ETP_WMIN_V2 0 83 #define ETP_WMAX_V2 15 84 85 /* 86 * v3 hardware has 2 kinds of packet types, 87 * v4 hardware has 3. 88 */ 89 #define PACKET_UNKNOWN 0x01 90 #define PACKET_DEBOUNCE 0x02 91 #define PACKET_V3_HEAD 0x03 92 #define PACKET_V3_TAIL 0x04 93 #define PACKET_V4_HEAD 0x05 94 #define PACKET_V4_MOTION 0x06 95 #define PACKET_V4_STATUS 0x07 96 97 /* 98 * track up to 5 fingers for v4 hardware 99 */ 100 #define ETP_MAX_FINGERS 5 101 102 /* 103 * weight value for v4 hardware 104 */ 105 #define ETP_WEIGHT_VALUE 5 106 107 /* 108 * The base position for one finger, v4 hardware 109 */ 110 struct finger_pos { 111 unsigned int x; 112 unsigned int y; 113 }; 114 115 struct elantech_data { 116 unsigned char reg_07; 117 unsigned char reg_10; 118 unsigned char reg_11; 119 unsigned char reg_20; 120 unsigned char reg_21; 121 unsigned char reg_22; 122 unsigned char reg_23; 123 unsigned char reg_24; 124 unsigned char reg_25; 125 unsigned char reg_26; 126 unsigned char debug; 127 unsigned char capabilities[3]; 128 bool paritycheck; 129 bool jumpy_cursor; 130 bool reports_pressure; 131 unsigned char hw_version; 132 unsigned int fw_version; 133 unsigned int single_finger_reports; 134 unsigned int y_max; 135 unsigned int width; 136 struct finger_pos mt[ETP_MAX_FINGERS]; 137 unsigned char parity[256]; 138 }; 139 140 #ifdef CONFIG_MOUSE_PS2_ELANTECH 141 int elantech_detect(struct psmouse *psmouse, bool set_properties); 142 int elantech_init(struct psmouse *psmouse); 143 #else 144 static inline int elantech_detect(struct psmouse *psmouse, bool set_properties) 145 { 146 return -ENOSYS; 147 } 148 static inline int elantech_init(struct psmouse *psmouse) 149 { 150 return -ENOSYS; 151 } 152 #endif /* CONFIG_MOUSE_PS2_ELANTECH */ 153 154 #endif 155