/* SPDX-License-Identifier: GPL-2.0-only *//* * Elantech Touchpad driver (v6) * * Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net> * * 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_ELANTECHint elantech_init(struct psmouse *psmouse);#elsestatic inline int elantech_init(struct psmouse *psmouse){	return -ENOSYS;}#endif /* CONFIG_MOUSE_PS2_ELANTECH */ int elantech_init_smbus(struct psmouse *psmouse); #endif