drivers/input/mouse/alps.h - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * ALPS touchpad PS/2 mouse driver
  *
  * Copyright (c) 2003 Peter Osterlund <petero2@telia.com>
  * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
  */

 #ifndef _ALPS_H
 #define _ALPS_H

 #include <linux/input/mt.h>

 #define ALPS_PROTO_V1		0x100
 #define ALPS_PROTO_V2		0x200
 #define ALPS_PROTO_V3		0x300
 #define ALPS_PROTO_V3_RUSHMORE	0x310
 #define ALPS_PROTO_V4		0x400
 #define ALPS_PROTO_V5		0x500
 #define ALPS_PROTO_V6		0x600
 #define ALPS_PROTO_V7		0x700	/* t3btl t4s */
 #define ALPS_PROTO_V8		0x800	/* SS4btl SS4s */
 #define ALPS_PROTO_V9		0x900	/* ss3btl */

 #define MAX_TOUCHES	4

 #define DOLPHIN_COUNT_PER_ELECTRODE	64
 #define DOLPHIN_PROFILE_XOFFSET		8	/* x-electrode offset */
 #define DOLPHIN_PROFILE_YOFFSET		1	/* y-electrode offset */

 /*
  * enum SS4_PACKET_ID - defines the packet type for V8
  * SS4_PACKET_ID_IDLE: There's no finger and no button activity.
  * SS4_PACKET_ID_ONE: There's one finger on touchpad
  *  or there's button activities.
  * SS4_PACKET_ID_TWO: There's two or more fingers on touchpad
  * SS4_PACKET_ID_MULTI: There's three or more fingers on touchpad
  * SS4_PACKET_ID_STICK: A stick pointer packet
 */
 enum SS4_PACKET_ID {
 	SS4_PACKET_ID_IDLE = 0,
 	SS4_PACKET_ID_ONE,
 	SS4_PACKET_ID_TWO,
 	SS4_PACKET_ID_MULTI,
 	SS4_PACKET_ID_STICK,
 };

 #define SS4_COUNT_PER_ELECTRODE		256
 #define SS4_NUMSENSOR_XOFFSET		7
 #define SS4_NUMSENSOR_YOFFSET		7
 #define SS4_MIN_PITCH_MM		50

 #define SS4_MASK_NORMAL_BUTTONS		0x07

 #define SS4PLUS_COUNT_PER_ELECTRODE	128
 #define SS4PLUS_NUMSENSOR_XOFFSET	16
 #define SS4PLUS_NUMSENSOR_YOFFSET	5
 #define SS4PLUS_MIN_PITCH_MM		37

 #define IS_SS4PLUS_DEV(_b)	(((_b[0]) == 0x73) &&	\
 				 ((_b[1]) == 0x03) &&	\
 				 ((_b[2]) == 0x28)		\
 				)

 #define SS4_IS_IDLE_V2(_b)	(((_b[0]) == 0x18) &&		\
 				 ((_b[1]) == 0x10) &&		\
 				 ((_b[2]) == 0x00) &&		\
 				 ((_b[3] & 0x88) == 0x08) &&	\
 				 ((_b[4]) == 0x10) &&		\
 				 ((_b[5]) == 0x00)		\
 				)

 #define SS4_1F_X_V2(_b)		(((_b[0]) & 0x0007) |		\
 				 ((_b[1] << 3) & 0x0078) |	\
 				 ((_b[1] << 2) & 0x0380) |	\
 				 ((_b[2] << 5) & 0x1C00)	\
 				)

 #define SS4_1F_Y_V2(_b)		(((_b[2]) & 0x000F) |		\
 				 ((_b[3] >> 2) & 0x0030) |	\
 				 ((_b[4] << 6) & 0x03C0) |	\
 				 ((_b[4] << 5) & 0x0C00)	\
 				)

 #define SS4_1F_Z_V2(_b)		(((_b[5]) & 0x0F) |		\
 				 ((_b[5] >> 1) & 0x70) |	\
 				 ((_b[4]) & 0x80)		\
 				)

 #define SS4_1F_LFB_V2(_b)	(((_b[2] >> 4) & 0x01) == 0x01)

 #define SS4_MF_LF_V2(_b, _i)	((_b[1 + (_i) * 3] & 0x0004) == 0x0004)

 #define SS4_BTN_V2(_b)		((_b[0] >> 5) & SS4_MASK_NORMAL_BUTTONS)

 #define SS4_STD_MF_X_V2(_b, _i)	(((_b[0 + (_i) * 3] << 5) & 0x00E0) |	\
 				 ((_b[1 + _i * 3]  << 5) & 0x1F00)	\
 				)

 #define SS4_PLUS_STD_MF_X_V2(_b, _i) (((_b[0 + (_i) * 3] << 4) & 0x0070) | \
 				 ((_b[1 + (_i) * 3]  << 4) & 0x0F80)	\
 				)

 #define SS4_STD_MF_Y_V2(_b, _i)	(((_b[1 + (_i) * 3] << 3) & 0x0010) |	\
 				 ((_b[2 + (_i) * 3] << 5) & 0x01E0) |	\
 				 ((_b[2 + (_i) * 3] << 4) & 0x0E00)	\
 				)

 #define SS4_BTL_MF_X_V2(_b, _i)	(SS4_STD_MF_X_V2(_b, _i) |		\
 				 ((_b[0 + (_i) * 3] >> 3) & 0x0010)	\
 				)

 #define SS4_PLUS_BTL_MF_X_V2(_b, _i) (SS4_PLUS_STD_MF_X_V2(_b, _i) |	\
 				 ((_b[0 + (_i) * 3] >> 4) & 0x0008)	\
 				)

 #define SS4_BTL_MF_Y_V2(_b, _i)	(SS4_STD_MF_Y_V2(_b, _i) | \
 				 ((_b[0 + (_i) * 3] >> 3) & 0x0008)	\
 				)

 #define SS4_MF_Z_V2(_b, _i)	(((_b[1 + (_i) * 3]) & 0x0001) |	\
 				 ((_b[1 + (_i) * 3] >> 1) & 0x0002)	\
 				)

 #define SS4_IS_MF_CONTINUE(_b)	((_b[2] & 0x10) == 0x10)
 #define SS4_IS_5F_DETECTED(_b)	((_b[2] & 0x10) == 0x10)

 #define SS4_TS_X_V2(_b)		(s8)(				\
 				 ((_b[0] & 0x01) << 7) |	\
 				 (_b[1] & 0x7F)		\
 				)

 #define SS4_TS_Y_V2(_b)		-(s8)(				\
 				 ((_b[3] & 0x01) << 7) |	\
 				 (_b[2] & 0x7F)		\
 				)

 #define SS4_TS_Z_V2(_b)		(s8)(_b[4] & 0x7F)


 #define SS4_MFPACKET_NO_AX		8160	/* X-Coordinate value */
 #define SS4_MFPACKET_NO_AY		4080	/* Y-Coordinate value */
 #define SS4_MFPACKET_NO_AX_BL		8176	/* Buttonless X-Coord value */
 #define SS4_MFPACKET_NO_AY_BL		4088	/* Buttonless Y-Coord value */
 #define SS4_PLUS_MFPACKET_NO_AX		4080	/* SS4 PLUS, X */
 #define SS4_PLUS_MFPACKET_NO_AX_BL	4088	/* Buttonless SS4 PLUS, X */

 /*
  * enum V7_PACKET_ID - defines the packet type for V7
  * V7_PACKET_ID_IDLE: There's no finger and no button activity.
  * V7_PACKET_ID_TWO: There's one or two non-resting fingers on touchpad
  *  or there's button activities.
  * V7_PACKET_ID_MULTI: There are at least three non-resting fingers.
  * V7_PACKET_ID_NEW: The finger position in slot is not continues from
  *  previous packet.
 */
 enum V7_PACKET_ID {
 	 V7_PACKET_ID_IDLE,
 	 V7_PACKET_ID_TWO,
 	 V7_PACKET_ID_MULTI,
 	 V7_PACKET_ID_NEW,
 	 V7_PACKET_ID_UNKNOWN,
 };

 /**
  * struct alps_protocol_info - information about protocol used by a device
  * @version: Indicates V1/V2/V3/...
  * @byte0: Helps figure out whether a position report packet matches the
  *   known format for this model.  The first byte of the report, ANDed with
  *   mask0, should match byte0.
  * @mask0: The mask used to check the first byte of the report.
  * @flags: Additional device capabilities (passthrough port, trackstick, etc.).
  */
 struct alps_protocol_info {
 	u16 version;
 	u8 byte0, mask0;
 	unsigned int flags;
 };

 /**
  * struct alps_model_info - touchpad ID table
  * @signature: E7 response string to match.
  * @protocol_info: information about protocol used by the device.
  *
  * Many (but not all) ALPS touchpads can be identified by looking at the
  * values returned in the "E7 report" and/or the "EC report."  This table
  * lists a number of such touchpads.
  */
 struct alps_model_info {
 	u8 signature[3];
 	struct alps_protocol_info protocol_info;
 };

 /**
  * struct alps_nibble_commands - encodings for register accesses
  * @command: PS/2 command used for the nibble
  * @data: Data supplied as an argument to the PS/2 command, if applicable
  *
  * The ALPS protocol uses magic sequences to transmit binary data to the
  * touchpad, as it is generally not OK to send arbitrary bytes out the
  * PS/2 port.  Each of the sequences in this table sends one nibble of the
  * register address or (write) data.  Different versions of the ALPS protocol
  * use slightly different encodings.
  */
 struct alps_nibble_commands {
 	int command;
 	unsigned char data;
 };

 struct alps_bitmap_point {
 	int start_bit;
 	int num_bits;
 };

 /**
  * struct alps_fields - decoded version of the report packet
  * @x_map: Bitmap of active X positions for MT.
  * @y_map: Bitmap of active Y positions for MT.
  * @fingers: Number of fingers for MT.
  * @pressure: Pressure.
  * @st: position for ST.
  * @mt: position for MT.
  * @first_mp: Packet is the first of a multi-packet report.
  * @is_mp: Packet is part of a multi-packet report.
  * @left: Left touchpad button is active.
  * @right: Right touchpad button is active.
  * @middle: Middle touchpad button is active.
  * @ts_left: Left trackstick button is active.
  * @ts_right: Right trackstick button is active.
  * @ts_middle: Middle trackstick button is active.
  */
 struct alps_fields {
 	unsigned int x_map;
 	unsigned int y_map;
 	unsigned int fingers;

 	int pressure;
 	struct input_mt_pos st;
 	struct input_mt_pos mt[MAX_TOUCHES];

 	unsigned int first_mp:1;
 	unsigned int is_mp:1;

 	unsigned int left:1;
 	unsigned int right:1;
 	unsigned int middle:1;

 	unsigned int ts_left:1;
 	unsigned int ts_right:1;
 	unsigned int ts_middle:1;
 };

 /**
  * struct alps_data - private data structure for the ALPS driver
  * @psmouse: Pointer to parent psmouse device
  * @dev2: Trackstick device (can be NULL).
  * @dev3: Generic PS/2 mouse (can be NULL, delayed registering).
  * @phys2: Physical path for the trackstick device.
  * @phys3: Physical path for the generic PS/2 mouse.
  * @dev3_register_work: Delayed work for registering PS/2 mouse.
  * @nibble_commands: Command mapping used for touchpad register accesses.
  * @addr_command: Command used to tell the touchpad that a register address
  *   follows.
  * @proto_version: Indicates V1/V2/V3/...
  * @byte0: Helps figure out whether a position report packet matches the
  *   known format for this model.  The first byte of the report, ANDed with
  *   mask0, should match byte0.
  * @mask0: The mask used to check the first byte of the report.
  * @fw_ver: cached copy of firmware version (EC report)
  * @flags: Additional device capabilities (passthrough port, trackstick, etc.).
  * @x_max: Largest possible X position value.
  * @y_max: Largest possible Y position value.
  * @x_bits: Number of X bits in the MT bitmap.
  * @y_bits: Number of Y bits in the MT bitmap.
  * @hw_init: Protocol-specific hardware init function.
  * @process_packet: Protocol-specific function to process a report packet.
  * @decode_fields: Protocol-specific function to read packet bitfields.
  * @set_abs_params: Protocol-specific function to configure the input_dev.
  * @prev_fin: Finger bit from previous packet.
  * @multi_packet: Multi-packet data in progress.
  * @multi_data: Saved multi-packet data.
  * @f: Decoded packet data fields.
  * @quirks: Bitmap of ALPS_QUIRK_*.
  * @timer: Timer for flushing out the final report packet in the stream.
  */
 struct alps_data {
 	struct psmouse *psmouse;
 	struct input_dev *dev2;
 	struct input_dev *dev3;
 	char phys2[32];
 	char phys3[32];
 	struct delayed_work dev3_register_work;

 	/* these are autodetected when the device is identified */
 	const struct alps_nibble_commands *nibble_commands;
 	int addr_command;
 	u16 proto_version;
 	u8 byte0, mask0;
 	u8 dev_id[3];
 	u8 fw_ver[3];
 	int flags;
 	int x_max;
 	int y_max;
 	int x_bits;
 	int y_bits;
 	unsigned int x_res;
 	unsigned int y_res;

 	int (*hw_init)(struct psmouse *psmouse);
 	void (*process_packet)(struct psmouse *psmouse);
 	int (*decode_fields)(struct alps_fields *f, unsigned char *p,
 			      struct psmouse *psmouse);
 	void (*set_abs_params)(struct alps_data *priv, struct input_dev *dev1);

 	int prev_fin;
 	int multi_packet;
 	int second_touch;
 	unsigned char multi_data[6];
 	struct alps_fields f;
 	u8 quirks;
 	struct timer_list timer;
 };

 #define ALPS_QUIRK_TRACKSTICK_BUTTONS	1 /* trakcstick buttons in trackstick packet */

 #ifdef CONFIG_MOUSE_PS2_ALPS
 int alps_detect(struct psmouse *psmouse, bool set_properties);
 int alps_init(struct psmouse *psmouse);
 #else
 inline int alps_detect(struct psmouse *psmouse, bool set_properties)
 {
 	return -ENOSYS;
 }
 inline int alps_init(struct psmouse *psmouse)
 {
 	return -ENOSYS;
 }
 #endif /* CONFIG_MOUSE_PS2_ALPS */

 #endif
	/* SPDX-License-Identifier: GPL-2.0-only */
	/*
	* ALPS touchpad PS/2 mouse driver
	*
	* Copyright (c) 2003 Peter Osterlund <petero2@telia.com>
	* Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
	*/

	#ifndef _ALPS_H
	#define _ALPS_H

	#include <linux/input/mt.h>

	#define ALPS_PROTO_V1 0x100
	#define ALPS_PROTO_V2 0x200
	#define ALPS_PROTO_V3 0x300
	#define ALPS_PROTO_V3_RUSHMORE 0x310
	#define ALPS_PROTO_V4 0x400
	#define ALPS_PROTO_V5 0x500
	#define ALPS_PROTO_V6 0x600
	#define ALPS_PROTO_V7 0x700 /* t3btl t4s */
	#define ALPS_PROTO_V8 0x800 /* SS4btl SS4s */
	#define ALPS_PROTO_V9 0x900 /* ss3btl */

	#define MAX_TOUCHES 4

	#define DOLPHIN_COUNT_PER_ELECTRODE 64
	#define DOLPHIN_PROFILE_XOFFSET 8 /* x-electrode offset */
	#define DOLPHIN_PROFILE_YOFFSET 1 /* y-electrode offset */

	/*
	* enum SS4_PACKET_ID - defines the packet type for V8
	* SS4_PACKET_ID_IDLE: There's no finger and no button activity.
	* SS4_PACKET_ID_ONE: There's one finger on touchpad
	* or there's button activities.
	* SS4_PACKET_ID_TWO: There's two or more fingers on touchpad
	* SS4_PACKET_ID_MULTI: There's three or more fingers on touchpad
	* SS4_PACKET_ID_STICK: A stick pointer packet
	*/
	enum SS4_PACKET_ID {
	SS4_PACKET_ID_IDLE = 0,
	SS4_PACKET_ID_ONE,
	SS4_PACKET_ID_TWO,
	SS4_PACKET_ID_MULTI,
	SS4_PACKET_ID_STICK,
	};

	#define SS4_COUNT_PER_ELECTRODE 256
	#define SS4_NUMSENSOR_XOFFSET 7
	#define SS4_NUMSENSOR_YOFFSET 7
	#define SS4_MIN_PITCH_MM 50

	#define SS4_MASK_NORMAL_BUTTONS 0x07

	#define SS4PLUS_COUNT_PER_ELECTRODE 128
	#define SS4PLUS_NUMSENSOR_XOFFSET 16
	#define SS4PLUS_NUMSENSOR_YOFFSET 5
	#define SS4PLUS_MIN_PITCH_MM 37

	#define IS_SS4PLUS_DEV(_b) (((_b[0]) == 0x73) && \
	((_b[1]) == 0x03) && \
	((_b[2]) == 0x28) \
	)

	#define SS4_IS_IDLE_V2(_b) (((_b[0]) == 0x18) && \
	((_b[1]) == 0x10) && \
	((_b[2]) == 0x00) && \
	((_b[3] & 0x88) == 0x08) && \
	((_b[4]) == 0x10) && \
	((_b[5]) == 0x00) \
	)

	#define SS4_1F_X_V2(_b) (((_b[0]) & 0x0007) \| \
	((_b[1] << 3) & 0x0078) \| \
	((_b[1] << 2) & 0x0380) \| \
	((_b[2] << 5) & 0x1C00) \
	)

	#define SS4_1F_Y_V2(_b) (((_b[2]) & 0x000F) \| \
	((_b[3] >> 2) & 0x0030) \| \
	((_b[4] << 6) & 0x03C0) \| \
	((_b[4] << 5) & 0x0C00) \
	)

	#define SS4_1F_Z_V2(_b) (((_b[5]) & 0x0F) \| \
	((_b[5] >> 1) & 0x70) \| \
	((_b[4]) & 0x80) \
	)

	#define SS4_1F_LFB_V2(_b) (((_b[2] >> 4) & 0x01) == 0x01)

	#define SS4_MF_LF_V2(_b, _i) ((_b[1 + (_i) * 3] & 0x0004) == 0x0004)

	#define SS4_BTN_V2(_b) ((_b[0] >> 5) & SS4_MASK_NORMAL_BUTTONS)

	#define SS4_STD_MF_X_V2(_b, _i) (((_b[0 + (_i) * 3] << 5) & 0x00E0) \| \
	((_b[1 + _i * 3] << 5) & 0x1F00) \
	)

	#define SS4_PLUS_STD_MF_X_V2(_b, _i) (((_b[0 + (_i) * 3] << 4) & 0x0070) \| \
	((_b[1 + (_i) * 3] << 4) & 0x0F80) \
	)

	#define SS4_STD_MF_Y_V2(_b, _i) (((_b[1 + (_i) * 3] << 3) & 0x0010) \| \
	((_b[2 + (_i) * 3] << 5) & 0x01E0) \| \
	((_b[2 + (_i) * 3] << 4) & 0x0E00) \
	)

	#define SS4_BTL_MF_X_V2(_b, _i) (SS4_STD_MF_X_V2(_b, _i) \| \
	((_b[0 + (_i) * 3] >> 3) & 0x0010) \
	)

	#define SS4_PLUS_BTL_MF_X_V2(_b, _i) (SS4_PLUS_STD_MF_X_V2(_b, _i) \| \
	((_b[0 + (_i) * 3] >> 4) & 0x0008) \
	)

	#define SS4_BTL_MF_Y_V2(_b, _i) (SS4_STD_MF_Y_V2(_b, _i) \| \
	((_b[0 + (_i) * 3] >> 3) & 0x0008) \
	)

	#define SS4_MF_Z_V2(_b, _i) (((_b[1 + (_i) * 3]) & 0x0001) \| \
	((_b[1 + (_i) * 3] >> 1) & 0x0002) \
	)

	#define SS4_IS_MF_CONTINUE(_b) ((_b[2] & 0x10) == 0x10)
	#define SS4_IS_5F_DETECTED(_b) ((_b[2] & 0x10) == 0x10)

	#define SS4_TS_X_V2(_b) (s8)( \
	((_b[0] & 0x01) << 7) \| \
	(_b[1] & 0x7F) \
	)

	#define SS4_TS_Y_V2(_b) -(s8)( \
	((_b[3] & 0x01) << 7) \| \
	(_b[2] & 0x7F) \
	)

	#define SS4_TS_Z_V2(_b) (s8)(_b[4] & 0x7F)


	#define SS4_MFPACKET_NO_AX 8160 /* X-Coordinate value */
	#define SS4_MFPACKET_NO_AY 4080 /* Y-Coordinate value */
	#define SS4_MFPACKET_NO_AX_BL 8176 /* Buttonless X-Coord value */
	#define SS4_MFPACKET_NO_AY_BL 4088 /* Buttonless Y-Coord value */
	#define SS4_PLUS_MFPACKET_NO_AX 4080 /* SS4 PLUS, X */
	#define SS4_PLUS_MFPACKET_NO_AX_BL 4088 /* Buttonless SS4 PLUS, X */

	/*
	* enum V7_PACKET_ID - defines the packet type for V7
	* V7_PACKET_ID_IDLE: There's no finger and no button activity.
	* V7_PACKET_ID_TWO: There's one or two non-resting fingers on touchpad
	* or there's button activities.
	* V7_PACKET_ID_MULTI: There are at least three non-resting fingers.
	* V7_PACKET_ID_NEW: The finger position in slot is not continues from
	* previous packet.
	*/
	enum V7_PACKET_ID {
	V7_PACKET_ID_IDLE,
	V7_PACKET_ID_TWO,
	V7_PACKET_ID_MULTI,
	V7_PACKET_ID_NEW,
	V7_PACKET_ID_UNKNOWN,
	};

	/**
	* struct alps_protocol_info - information about protocol used by a device
	* @version: Indicates V1/V2/V3/...
	* @byte0: Helps figure out whether a position report packet matches the
	* known format for this model. The first byte of the report, ANDed with
	* mask0, should match byte0.
	* @mask0: The mask used to check the first byte of the report.
	* @flags: Additional device capabilities (passthrough port, trackstick, etc.).
	*/
	struct alps_protocol_info {
	u16 version;
	u8 byte0, mask0;
	unsigned int flags;
	};

	/**
	* struct alps_model_info - touchpad ID table
	* @signature: E7 response string to match.
	* @protocol_info: information about protocol used by the device.
	*
	* Many (but not all) ALPS touchpads can be identified by looking at the
	* values returned in the "E7 report" and/or the "EC report." This table
	* lists a number of such touchpads.
	*/
	struct alps_model_info {
	u8 signature[3];
	struct alps_protocol_info protocol_info;
	};

	/**
	* struct alps_nibble_commands - encodings for register accesses
	* @command: PS/2 command used for the nibble
	* @data: Data supplied as an argument to the PS/2 command, if applicable
	*
	* The ALPS protocol uses magic sequences to transmit binary data to the
	* touchpad, as it is generally not OK to send arbitrary bytes out the
	* PS/2 port. Each of the sequences in this table sends one nibble of the
	* register address or (write) data. Different versions of the ALPS protocol
	* use slightly different encodings.
	*/
	struct alps_nibble_commands {
	int command;
	unsigned char data;
	};

	struct alps_bitmap_point {
	int start_bit;
	int num_bits;
	};

	/**
	* struct alps_fields - decoded version of the report packet
	* @x_map: Bitmap of active X positions for MT.
	* @y_map: Bitmap of active Y positions for MT.
	* @fingers: Number of fingers for MT.
	* @pressure: Pressure.
	* @st: position for ST.
	* @mt: position for MT.
	* @first_mp: Packet is the first of a multi-packet report.
	* @is_mp: Packet is part of a multi-packet report.
	* @left: Left touchpad button is active.
	* @right: Right touchpad button is active.
	* @middle: Middle touchpad button is active.
	* @ts_left: Left trackstick button is active.
	* @ts_right: Right trackstick button is active.
	* @ts_middle: Middle trackstick button is active.
	*/
	struct alps_fields {
	unsigned int x_map;
	unsigned int y_map;
	unsigned int fingers;

	int pressure;
	struct input_mt_pos st;
	struct input_mt_pos mt[MAX_TOUCHES];

	unsigned int first_mp:1;
	unsigned int is_mp:1;

	unsigned int left:1;
	unsigned int right:1;
	unsigned int middle:1;

	unsigned int ts_left:1;
	unsigned int ts_right:1;
	unsigned int ts_middle:1;
	};

	/**
	* struct alps_data - private data structure for the ALPS driver
	* @psmouse: Pointer to parent psmouse device
	* @dev2: Trackstick device (can be NULL).
	* @dev3: Generic PS/2 mouse (can be NULL, delayed registering).
	* @phys2: Physical path for the trackstick device.
	* @phys3: Physical path for the generic PS/2 mouse.
	* @dev3_register_work: Delayed work for registering PS/2 mouse.
	* @nibble_commands: Command mapping used for touchpad register accesses.
	* @addr_command: Command used to tell the touchpad that a register address
	* follows.
	* @proto_version: Indicates V1/V2/V3/...
	* @byte0: Helps figure out whether a position report packet matches the
	* known format for this model. The first byte of the report, ANDed with
	* mask0, should match byte0.
	* @mask0: The mask used to check the first byte of the report.
	* @fw_ver: cached copy of firmware version (EC report)
	* @flags: Additional device capabilities (passthrough port, trackstick, etc.).
	* @x_max: Largest possible X position value.
	* @y_max: Largest possible Y position value.
	* @x_bits: Number of X bits in the MT bitmap.
	* @y_bits: Number of Y bits in the MT bitmap.
	* @hw_init: Protocol-specific hardware init function.
	* @process_packet: Protocol-specific function to process a report packet.
	* @decode_fields: Protocol-specific function to read packet bitfields.
	* @set_abs_params: Protocol-specific function to configure the input_dev.
	* @prev_fin: Finger bit from previous packet.
	* @multi_packet: Multi-packet data in progress.
	* @multi_data: Saved multi-packet data.
	* @f: Decoded packet data fields.
	* @quirks: Bitmap of ALPS_QUIRK_*.
	* @timer: Timer for flushing out the final report packet in the stream.
	*/
	struct alps_data {
	struct psmouse *psmouse;
	struct input_dev *dev2;
	struct input_dev *dev3;
	char phys2[32];
	char phys3[32];
	struct delayed_work dev3_register_work;

	/* these are autodetected when the device is identified */
	const struct alps_nibble_commands *nibble_commands;
	int addr_command;
	u16 proto_version;
	u8 byte0, mask0;
	u8 dev_id[3];
	u8 fw_ver[3];
	int flags;
	int x_max;
	int y_max;
	int x_bits;
	int y_bits;
	unsigned int x_res;
	unsigned int y_res;

	int (hw_init)(struct psmouse psmouse);
	void (process_packet)(struct psmouse psmouse);
	int (decode_fields)(struct alps_fields f, unsigned char *p,
	struct psmouse *psmouse);
	void (set_abs_params)(struct alps_data priv, struct input_dev *dev1);

	int prev_fin;
	int multi_packet;
	int second_touch;
	unsigned char multi_data[6];
	struct alps_fields f;
	u8 quirks;
	struct timer_list timer;
	};

	#define ALPS_QUIRK_TRACKSTICK_BUTTONS 1 /* trakcstick buttons in trackstick packet */

	#ifdef CONFIG_MOUSE_PS2_ALPS
	int alps_detect(struct psmouse *psmouse, bool set_properties);
	int alps_init(struct psmouse *psmouse);
	#else
	inline int alps_detect(struct psmouse *psmouse, bool set_properties)
	{
	return -ENOSYS;
	}
	inline int alps_init(struct psmouse *psmouse)
	{
	return -ENOSYS;
	}
	#endif /* CONFIG_MOUSE_PS2_ALPS */

	#endif