206 lines
4.7 KiB
C
206 lines
4.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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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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* 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_ID_QUERY 0x00
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#define ETP_FW_VERSION_QUERY 0x01
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#define ETP_CAPABILITIES_QUERY 0x02
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#define ETP_SAMPLE_QUERY 0x03
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#define ETP_RESOLUTION_QUERY 0x04
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#define ETP_ICBODY_QUERY 0x05
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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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#define ETP_REGISTER_READWRITE 0x00
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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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* The resolution for older v2 hardware doubled.
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* (newer v2's firmware provides command so we can query)
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*/
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#define ETP_XMIN_V2 0
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#define ETP_XMAX_V2 1152
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#define ETP_YMIN_V2 0
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#define ETP_YMAX_V2 768
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#define ETP_PMIN_V2 0
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#define ETP_PMAX_V2 255
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#define ETP_WMIN_V2 0
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#define ETP_WMAX_V2 15
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/*
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* v3 hardware has 2 kinds of packet types,
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* v4 hardware has 3.
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*/
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#define PACKET_UNKNOWN 0x01
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#define PACKET_DEBOUNCE 0x02
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#define PACKET_V3_HEAD 0x03
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#define PACKET_V3_TAIL 0x04
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#define PACKET_V4_HEAD 0x05
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#define PACKET_V4_MOTION 0x06
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#define PACKET_V4_STATUS 0x07
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#define PACKET_TRACKPOINT 0x08
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/*
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* track up to 5 fingers for v4 hardware
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*/
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#define ETP_MAX_FINGERS 5
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/*
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* weight value for v4 hardware
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*/
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#define ETP_WEIGHT_VALUE 5
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/*
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* Bus information on 3rd byte of query ETP_RESOLUTION_QUERY(0x04)
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*/
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#define ETP_BUS_PS2_ONLY 0
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#define ETP_BUS_SMB_ALERT_ONLY 1
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#define ETP_BUS_SMB_HST_NTFY_ONLY 2
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#define ETP_BUS_PS2_SMB_ALERT 3
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#define ETP_BUS_PS2_SMB_HST_NTFY 4
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/*
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* New ICs are either using SMBus Host Notify or just plain PS2.
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*
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* ETP_FW_VERSION_QUERY is:
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* Byte 1:
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* - bit 0..3: IC BODY
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* Byte 2:
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* - bit 4: HiddenButton
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* - bit 5: PS2_SMBUS_NOTIFY
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* - bit 6: PS2CRCCheck
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*/
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#define ETP_NEW_IC_SMBUS_HOST_NOTIFY(fw_version) \
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((((fw_version) & 0x0f2000) == 0x0f2000) && \
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((fw_version) & 0x0000ff) > 0)
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/*
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* The base position for one finger, v4 hardware
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*/
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struct finger_pos {
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unsigned int x;
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unsigned int y;
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};
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struct elantech_device_info {
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unsigned char capabilities[3];
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unsigned char samples[3];
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unsigned char debug;
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unsigned char hw_version;
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unsigned char pattern;
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unsigned int fw_version;
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unsigned int ic_version;
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unsigned int product_id;
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unsigned int x_min;
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unsigned int y_min;
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unsigned int x_max;
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unsigned int y_max;
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unsigned int x_res;
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unsigned int y_res;
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unsigned int x_traces;
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unsigned int y_traces;
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unsigned int width;
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unsigned int bus;
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bool paritycheck;
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bool jumpy_cursor;
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bool reports_pressure;
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bool crc_enabled;
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bool set_hw_resolution;
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bool has_trackpoint;
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bool has_middle_button;
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int (*send_cmd)(struct psmouse *psmouse, unsigned char c,
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unsigned char *param);
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};
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struct elantech_data {
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struct input_dev *tp_dev; /* Relative device for trackpoint */
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char tp_phys[32];
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unsigned char reg_07;
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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 int single_finger_reports;
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unsigned int y_max;
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unsigned int width;
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struct finger_pos mt[ETP_MAX_FINGERS];
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unsigned char parity[256];
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struct elantech_device_info info;
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void (*original_set_rate)(struct psmouse *psmouse, unsigned int rate);
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};
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int elantech_detect(struct psmouse *psmouse, bool set_properties);
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int elantech_init_ps2(struct psmouse *psmouse);
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#ifdef CONFIG_MOUSE_PS2_ELANTECH
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int elantech_init(struct psmouse *psmouse);
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#else
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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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int elantech_init_smbus(struct psmouse *psmouse);
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#endif
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