126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
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/*
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* Elantech Touchpad driver (v6)
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*
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* Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* Trademarks are the property of their respective owners.
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*/
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#ifndef _ELANTECH_H
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#define _ELANTECH_H
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/*
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* Command values for Synaptics style queries
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*/
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#define ETP_FW_VERSION_QUERY 0x01
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#define ETP_CAPABILITIES_QUERY 0x02
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/*
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* Command values for register reading or writing
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*/
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#define ETP_REGISTER_READ 0x10
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#define ETP_REGISTER_WRITE 0x11
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/*
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* Hardware version 2 custom PS/2 command value
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*/
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#define ETP_PS2_CUSTOM_COMMAND 0xf8
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/*
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* Times to retry a ps2_command and millisecond delay between tries
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*/
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#define ETP_PS2_COMMAND_TRIES 3
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#define ETP_PS2_COMMAND_DELAY 500
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/*
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* Times to try to read back a register and millisecond delay between tries
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*/
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#define ETP_READ_BACK_TRIES 5
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#define ETP_READ_BACK_DELAY 2000
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/*
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* Register bitmasks for hardware version 1
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*/
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#define ETP_R10_ABSOLUTE_MODE 0x04
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#define ETP_R11_4_BYTE_MODE 0x02
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/*
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* Capability bitmasks
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*/
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#define ETP_CAP_HAS_ROCKER 0x04
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/*
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* One hard to find application note states that X axis range is 0 to 576
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* and Y axis range is 0 to 384 for harware version 1.
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* Edge fuzz might be necessary because of bezel around the touchpad
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*/
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#define ETP_EDGE_FUZZ_V1 32
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#define ETP_XMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1)
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#define ETP_XMAX_V1 (576 - ETP_EDGE_FUZZ_V1)
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#define ETP_YMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1)
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#define ETP_YMAX_V1 (384 - ETP_EDGE_FUZZ_V1)
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/*
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* It seems the resolution for hardware version 2 doubled.
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* Hence the X and Y ranges are doubled too.
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* The bezel around the pad also appears to be smaller
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*/
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#define ETP_EDGE_FUZZ_V2 8
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#define ETP_XMIN_V2 ( 0 + ETP_EDGE_FUZZ_V2)
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#define ETP_XMAX_V2 (1152 - ETP_EDGE_FUZZ_V2)
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#define ETP_YMIN_V2 ( 0 + ETP_EDGE_FUZZ_V2)
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#define ETP_YMAX_V2 ( 768 - ETP_EDGE_FUZZ_V2)
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/*
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* For two finger touches the coordinate of each finger gets reported
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* separately but with reduced resolution.
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*/
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#define ETP_2FT_FUZZ 4
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#define ETP_2FT_XMIN ( 0 + ETP_2FT_FUZZ)
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#define ETP_2FT_XMAX (288 - ETP_2FT_FUZZ)
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#define ETP_2FT_YMIN ( 0 + ETP_2FT_FUZZ)
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#define ETP_2FT_YMAX (192 - ETP_2FT_FUZZ)
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struct elantech_data {
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unsigned char reg_10;
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unsigned char reg_11;
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unsigned char reg_20;
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unsigned char reg_21;
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unsigned char reg_22;
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unsigned char reg_23;
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unsigned char reg_24;
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unsigned char reg_25;
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unsigned char reg_26;
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unsigned char debug;
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unsigned char capabilities;
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bool paritycheck;
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bool jumpy_cursor;
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unsigned char hw_version;
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unsigned int fw_version;
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unsigned int single_finger_reports;
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unsigned char parity[256];
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};
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#ifdef CONFIG_MOUSE_PS2_ELANTECH
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int elantech_detect(struct psmouse *psmouse, bool set_properties);
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int elantech_init(struct psmouse *psmouse);
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#else
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static inline int elantech_detect(struct psmouse *psmouse, bool set_properties)
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{
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return -ENOSYS;
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}
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static inline int elantech_init(struct psmouse *psmouse)
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{
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return -ENOSYS;
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}
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#endif /* CONFIG_MOUSE_PS2_ELANTECH */
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#endif
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