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- /* SPDX-License-Identifier: GPL-2.0-only */
- /*
- * Elantech Touchpad driver (v6)
- *
- * Copyright (C) 2007-2009 Arjan Opmeer <[email protected]>
- *
- * Trademarks are the property of their respective owners.
- */
- #ifndef _ELANTECH_H
- #define _ELANTECH_H
- /*
- * Command values for Synaptics style queries
- */
- #define ETP_FW_ID_QUERY 0x00
- #define ETP_FW_VERSION_QUERY 0x01
- #define ETP_CAPABILITIES_QUERY 0x02
- #define ETP_SAMPLE_QUERY 0x03
- #define ETP_RESOLUTION_QUERY 0x04
- #define ETP_ICBODY_QUERY 0x05
- /*
- * Command values for register reading or writing
- */
- #define ETP_REGISTER_READ 0x10
- #define ETP_REGISTER_WRITE 0x11
- #define ETP_REGISTER_READWRITE 0x00
- /*
- * Hardware version 2 custom PS/2 command value
- */
- #define ETP_PS2_CUSTOM_COMMAND 0xf8
- /*
- * Times to retry a ps2_command and millisecond delay between tries
- */
- #define ETP_PS2_COMMAND_TRIES 3
- #define ETP_PS2_COMMAND_DELAY 500
- /*
- * Times to try to read back a register and millisecond delay between tries
- */
- #define ETP_READ_BACK_TRIES 5
- #define ETP_READ_BACK_DELAY 2000
- /*
- * Register bitmasks for hardware version 1
- */
- #define ETP_R10_ABSOLUTE_MODE 0x04
- #define ETP_R11_4_BYTE_MODE 0x02
- /*
- * Capability bitmasks
- */
- #define ETP_CAP_HAS_ROCKER 0x04
- /*
- * One hard to find application note states that X axis range is 0 to 576
- * and Y axis range is 0 to 384 for harware version 1.
- * Edge fuzz might be necessary because of bezel around the touchpad
- */
- #define ETP_EDGE_FUZZ_V1 32
- #define ETP_XMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1)
- #define ETP_XMAX_V1 (576 - ETP_EDGE_FUZZ_V1)
- #define ETP_YMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1)
- #define ETP_YMAX_V1 (384 - ETP_EDGE_FUZZ_V1)
- /*
- * The resolution for older v2 hardware doubled.
- * (newer v2's firmware provides command so we can query)
- */
- #define ETP_XMIN_V2 0
- #define ETP_XMAX_V2 1152
- #define ETP_YMIN_V2 0
- #define ETP_YMAX_V2 768
- #define ETP_PMIN_V2 0
- #define ETP_PMAX_V2 255
- #define ETP_WMIN_V2 0
- #define ETP_WMAX_V2 15
- /*
- * v3 hardware has 2 kinds of packet types,
- * v4 hardware has 3.
- */
- #define PACKET_UNKNOWN 0x01
- #define PACKET_DEBOUNCE 0x02
- #define PACKET_V3_HEAD 0x03
- #define PACKET_V3_TAIL 0x04
- #define PACKET_V4_HEAD 0x05
- #define PACKET_V4_MOTION 0x06
- #define PACKET_V4_STATUS 0x07
- #define PACKET_TRACKPOINT 0x08
- /*
- * track up to 5 fingers for v4 hardware
- */
- #define ETP_MAX_FINGERS 5
- /*
- * weight value for v4 hardware
- */
- #define ETP_WEIGHT_VALUE 5
- /*
- * Bus information on 3rd byte of query ETP_RESOLUTION_QUERY(0x04)
- */
- #define ETP_BUS_PS2_ONLY 0
- #define ETP_BUS_SMB_ALERT_ONLY 1
- #define ETP_BUS_SMB_HST_NTFY_ONLY 2
- #define ETP_BUS_PS2_SMB_ALERT 3
- #define ETP_BUS_PS2_SMB_HST_NTFY 4
- /*
- * New ICs are either using SMBus Host Notify or just plain PS2.
- *
- * ETP_FW_VERSION_QUERY is:
- * Byte 1:
- * - bit 0..3: IC BODY
- * Byte 2:
- * - bit 4: HiddenButton
- * - bit 5: PS2_SMBUS_NOTIFY
- * - bit 6: PS2CRCCheck
- */
- #define ETP_NEW_IC_SMBUS_HOST_NOTIFY(fw_version) \
- ((((fw_version) & 0x0f2000) == 0x0f2000) && \
- ((fw_version) & 0x0000ff) > 0)
- /*
- * The base position for one finger, v4 hardware
- */
- struct finger_pos {
- unsigned int x;
- unsigned int y;
- };
- struct elantech_device_info {
- unsigned char capabilities[3];
- unsigned char samples[3];
- unsigned char debug;
- unsigned char hw_version;
- unsigned char pattern;
- unsigned int fw_version;
- unsigned int ic_version;
- unsigned int product_id;
- unsigned int x_min;
- unsigned int y_min;
- unsigned int x_max;
- unsigned int y_max;
- unsigned int x_res;
- unsigned int y_res;
- unsigned int x_traces;
- unsigned int y_traces;
- unsigned int width;
- unsigned int bus;
- bool paritycheck;
- bool jumpy_cursor;
- bool reports_pressure;
- bool crc_enabled;
- bool set_hw_resolution;
- bool has_trackpoint;
- bool has_middle_button;
- int (*send_cmd)(struct psmouse *psmouse, unsigned char c,
- unsigned char *param);
- };
- struct elantech_data {
- struct input_dev *tp_dev; /* Relative device for trackpoint */
- char tp_phys[32];
- unsigned char reg_07;
- unsigned char reg_10;
- unsigned char reg_11;
- unsigned char reg_20;
- unsigned char reg_21;
- unsigned char reg_22;
- unsigned char reg_23;
- unsigned char reg_24;
- unsigned char reg_25;
- unsigned char reg_26;
- unsigned int single_finger_reports;
- unsigned int y_max;
- unsigned int width;
- struct finger_pos mt[ETP_MAX_FINGERS];
- unsigned char parity[256];
- struct elantech_device_info info;
- void (*original_set_rate)(struct psmouse *psmouse, unsigned int rate);
- };
- int elantech_detect(struct psmouse *psmouse, bool set_properties);
- int elantech_init_ps2(struct psmouse *psmouse);
- #ifdef CONFIG_MOUSE_PS2_ELANTECH
- int elantech_init(struct psmouse *psmouse);
- #else
- static inline int elantech_init(struct psmouse *psmouse)
- {
- return -ENOSYS;
- }
- #endif /* CONFIG_MOUSE_PS2_ELANTECH */
- int elantech_init_smbus(struct psmouse *psmouse);
- #endif
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