/* SPDX-License-Identifier: GPL-2.0-only *//* * IBM TrackPoint PS/2 mouse driver * * Stephen Evanchik <evanchsa@gmail.com> */ #ifndef _TRACKPOINT_H#define _TRACKPOINT_H /* * These constants are from the TrackPoint System * Engineering documentation Version 4 from IBM Watson * research: *	http://wwwcssrv.almaden.ibm.com/trackpoint/download.html */ #define TP_COMMAND		0xE2	/* Commands start with this */ #define TP_READ_ID		0xE1	/* Sent for device identification */ /* * Valid first byte responses to the "Read Secondary ID" (0xE1) command. * 0x01 was the original IBM trackpoint, others implement very limited * subset of trackpoint features. */#define TP_VARIANT_IBM			0x01#define TP_VARIANT_ALPS			0x02#define TP_VARIANT_ELAN			0x03#define TP_VARIANT_NXP			0x04#define TP_VARIANT_JYT_SYNAPTICS	0x05#define TP_VARIANT_SYNAPTICS		0x06 /* * Commands */#define TP_RECALIB		0x51	/* Recalibrate */#define TP_POWER_DOWN		0x44	/* Can only be undone through HW reset */#define TP_EXT_DEV		0x21	/* Determines if external device is connected (RO) */#define TP_EXT_BTN		0x4B	/* Read extended button status */#define TP_POR			0x7F	/* Execute Power on Reset */#define TP_POR_RESULTS		0x25	/* Read Power on Self test results */#define TP_DISABLE_EXT		0x40	/* Disable external pointing device */#define TP_ENABLE_EXT		0x41	/* Enable external pointing device */ /* * Mode manipulation */#define TP_SET_SOFT_TRANS	0x4E	/* Set mode */#define TP_CANCEL_SOFT_TRANS	0xB9	/* Cancel mode */#define TP_SET_HARD_TRANS	0x45	/* Mode can only be set */  /* * Register oriented commands/properties */#define TP_WRITE_MEM		0x81#define TP_READ_MEM		0x80	/* Not used in this implementation */ /** RAM Locations for properties */#define TP_SENS			0x4A	/* Sensitivity */#define TP_MB			0x4C	/* Read Middle Button Status (RO) */#define TP_INERTIA		0x4D	/* Negative Inertia */#define TP_SPEED		0x60	/* Speed of TP Cursor */#define TP_REACH		0x57	/* Backup for Z-axis press */#define TP_DRAGHYS		0x58	/* Drag Hysteresis */					/* (how hard it is to drag */					/* with Z-axis pressed) */ #define TP_DOUBLETAP		0x58	/* TrackPoint doubletap register */ #define TP_MINDRAG		0x59	/* Minimum amount of force needed */					/* to trigger dragging */ #define TP_THRESH		0x5C	/* Minimum value for a Z-axis press */#define TP_UP_THRESH		0x5A	/* Used to generate a 'click' on Z-axis */#define TP_Z_TIME		0x5E	/* How sharp of a press */#define TP_JENKS_CURV		0x5D	/* Minimum curvature for double click */#define TP_DRIFT_TIME		0x5F	/* How long a 'hands off' condition */					/* must last (x*107ms) for drift */					/* correction to occur */ /* * Toggling Flag bits */#define TP_TOGGLE		0x47	/* Toggle command */ #define TP_TOGGLE_MB		0x23	/* Disable/Enable Middle Button */#define TP_MASK_MB			0x01#define TP_TOGGLE_EXT_DEV	0x23	/* Disable external device */#define TP_MASK_EXT_DEV			0x02#define TP_TOGGLE_DRIFT		0x23	/* Drift Correction */#define TP_MASK_DRIFT			0x80#define TP_TOGGLE_BURST		0x28	/* Burst Mode */#define TP_MASK_BURST			0x80#define TP_TOGGLE_PTSON		0x2C	/* Press to Select */#define TP_MASK_PTSON			0x01#define TP_TOGGLE_HARD_TRANS	0x2C	/* Alternate method to set Hard Transparency */#define TP_MASK_HARD_TRANS		0x80#define TP_TOGGLE_TWOHAND	0x2D	/* Two handed */#define TP_MASK_TWOHAND			0x01#define TP_TOGGLE_STICKY_TWO	0x2D	/* Sticky two handed */#define TP_MASK_STICKY_TWO		0x04#define TP_TOGGLE_SKIPBACK	0x2D	/* Suppress movement after drag release */#define TP_MASK_SKIPBACK		0x08#define TP_TOGGLE_SOURCE_TAG	0x20	/* Bit 3 of the first packet will be set to					   to the origin of the packet (external or TP) */#define TP_MASK_SOURCE_TAG		0x80#define TP_TOGGLE_EXT_TAG	0x22	/* Bit 3 of the first packet coming from the					   external device will be forced to 1 */#define TP_MASK_EXT_TAG			0x04 /* Doubletap register values */#define TP_DOUBLETAP_ENABLE	0xFF	/* Enable value */#define TP_DOUBLETAP_DISABLE	0xFE	/* Disable value */ /* Power on Self Test Results */#define TP_POR_SUCCESS		0x3B /* * Default power on values */#define TP_DEF_SENS		0x80#define TP_DEF_INERTIA		0x06#define TP_DEF_SPEED		0x61#define TP_DEF_REACH		0x0A #define TP_DEF_DRAGHYS		0xFF#define TP_DEF_MINDRAG		0x14 #define TP_DEF_THRESH		0x08#define TP_DEF_UP_THRESH	0xFF#define TP_DEF_Z_TIME		0x26#define TP_DEF_JENKS_CURV	0x87#define TP_DEF_DRIFT_TIME	0x05 /* Toggles */#define TP_DEF_MB		0x00#define TP_DEF_PTSON		0x00#define TP_DEF_SKIPBACK		0x00#define TP_DEF_EXT_DEV		0x00	/* 0 means enabled */#define TP_DEF_TWOHAND		0x00#define TP_DEF_SOURCE_TAG	0x00 #define MAKE_PS2_CMD(params, results, cmd) ((params<<12) | (results<<8) | (cmd)) struct trackpoint_data {	u8 variant_id;	u8 firmware_id; 	u8 sensitivity, speed, inertia, reach;	u8 draghys, mindrag;	u8 thresh, upthresh;	u8 ztime, jenks;	u8 drift_time; 	/* toggles */	bool press_to_select;	bool skipback;	bool ext_dev;}; int trackpoint_detect(struct psmouse *psmouse, bool set_properties); #endif /* _TRACKPOINT_H */