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 #define ETP_RESOLUTION_QUERY 0x04 24 25 /* 26 * Command values for register reading or writing 27 */ 28 #define ETP_REGISTER_READ 0x10 29 #define ETP_REGISTER_WRITE 0x11 30 #define ETP_REGISTER_READWRITE 0x00 31 32 /* 33 * Hardware version 2 custom PS/2 command value 34 */ 35 #define ETP_PS2_CUSTOM_COMMAND 0xf8 36 37 /* 38 * Times to retry a ps2_command and millisecond delay between tries 39 */ 40 #define ETP_PS2_COMMAND_TRIES 3 41 #define ETP_PS2_COMMAND_DELAY 500 42 43 /* 44 * Times to try to read back a register and millisecond delay between tries 45 */ 46 #define ETP_READ_BACK_TRIES 5 47 #define ETP_READ_BACK_DELAY 2000 48 49 /* 50 * Register bitmasks for hardware version 1 51 */ 52 #define ETP_R10_ABSOLUTE_MODE 0x04 53 #define ETP_R11_4_BYTE_MODE 0x02 54 55 /* 56 * Capability bitmasks 57 */ 58 #define ETP_CAP_HAS_ROCKER 0x04 59 60 /* 61 * One hard to find application note states that X axis range is 0 to 576 62 * and Y axis range is 0 to 384 for harware version 1. 63 * Edge fuzz might be necessary because of bezel around the touchpad 64 */ 65 #define ETP_EDGE_FUZZ_V1 32 66 67 #define ETP_XMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1) 68 #define ETP_XMAX_V1 (576 - ETP_EDGE_FUZZ_V1) 69 #define ETP_YMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1) 70 #define ETP_YMAX_V1 (384 - ETP_EDGE_FUZZ_V1) 71 72 /* 73 * The resolution for older v2 hardware doubled. 74 * (newer v2's firmware provides command so we can query) 75 */ 76 #define ETP_XMIN_V2 0 77 #define ETP_XMAX_V2 1152 78 #define ETP_YMIN_V2 0 79 #define ETP_YMAX_V2 768 80 81 #define ETP_PMIN_V2 0 82 #define ETP_PMAX_V2 255 83 #define ETP_WMIN_V2 0 84 #define ETP_WMAX_V2 15 85 86 /* 87 * v3 hardware has 2 kinds of packet types, 88 * v4 hardware has 3. 89 */ 90 #define PACKET_UNKNOWN 0x01 91 #define PACKET_DEBOUNCE 0x02 92 #define PACKET_V3_HEAD 0x03 93 #define PACKET_V3_TAIL 0x04 94 #define PACKET_V4_HEAD 0x05 95 #define PACKET_V4_MOTION 0x06 96 #define PACKET_V4_STATUS 0x07 97 #define PACKET_TRACKPOINT 0x08 98 99 /* 100 * track up to 5 fingers for v4 hardware 101 */ 102 #define ETP_MAX_FINGERS 5 103 104 /* 105 * weight value for v4 hardware 106 */ 107 #define ETP_WEIGHT_VALUE 5 108 109 /* 110 * The base position for one finger, v4 hardware 111 */ 112 struct finger_pos { 113 unsigned int x; 114 unsigned int y; 115 }; 116 117 struct elantech_data { 118 struct input_dev *tp_dev; /* Relative device for trackpoint */ 119 char tp_phys[32]; 120 unsigned char reg_07; 121 unsigned char reg_10; 122 unsigned char reg_11; 123 unsigned char reg_20; 124 unsigned char reg_21; 125 unsigned char reg_22; 126 unsigned char reg_23; 127 unsigned char reg_24; 128 unsigned char reg_25; 129 unsigned char reg_26; 130 unsigned char debug; 131 unsigned char capabilities[3]; 132 unsigned char samples[3]; 133 bool paritycheck; 134 bool jumpy_cursor; 135 bool reports_pressure; 136 bool crc_enabled; 137 bool set_hw_resolution; 138 unsigned char hw_version; 139 unsigned int fw_version; 140 unsigned int single_finger_reports; 141 unsigned int y_max; 142 unsigned int width; 143 struct finger_pos mt[ETP_MAX_FINGERS]; 144 unsigned char parity[256]; 145 int (*send_cmd)(struct psmouse *psmouse, unsigned char c, unsigned char *param); 146 void (*original_set_rate)(struct psmouse *psmouse, unsigned int rate); 147 }; 148 149 #ifdef CONFIG_MOUSE_PS2_ELANTECH 150 int elantech_detect(struct psmouse *psmouse, bool set_properties); 151 int elantech_init(struct psmouse *psmouse); 152 #else 153 static inline int elantech_detect(struct psmouse *psmouse, bool set_properties) 154 { 155 return -ENOSYS; 156 } 157 static inline int elantech_init(struct psmouse *psmouse) 158 { 159 return -ENOSYS; 160 } 161 #endif /* CONFIG_MOUSE_PS2_ELANTECH */ 162 163 #endif 164