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#ifndef _LIBPS2_H

#define _LIBPS2_H

/*

 * Copyright (C) 1999-2002 Vojtech Pavlik

 * Copyright (C) 2004 Dmitry Torokhov

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 as published by

 * the Free Software Foundation.

 */

#define PS2_CMD_GETID           0x02f2

#define PS2_CMD_RESET_BAT       0x02ff

#define PS2_RET_BAT             0xaa

#define PS2_RET_ID              0x00

#define PS2_RET_ACK             0xfa

#define PS2_RET_NAK             0xfe

#define PS2_FLAG_ACK            1       /* Waiting for ACK/NAK */

#define PS2_FLAG_CMD            2       /* Waiting for command to finish */

#define PS2_FLAG_CMD1           4       /* Waiting for the first byte of command response */

#define PS2_FLAG_WAITID         8       /* Command execiting is GET ID */

struct ps2dev {

        struct serio *serio;

        /* Ensures that only one command is executing at a time */

        struct mutex cmd_mutex;

        /* Used to signal completion from interrupt handler */

        wait_queue_head_t wait;

        unsigned long flags;

        unsigned char cmdbuf[6];

        unsigned char cmdcnt;

        unsigned char nak;

};

void ps2_init(struct ps2dev *ps2dev, struct serio *serio);

int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout);

void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout);

int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command);

int ps2_schedule_command(struct ps2dev *ps2dev, unsigned char *param, int command);

int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data);

int ps2_handle_response(struct ps2dev *ps2dev, unsigned char data);

void ps2_cmd_aborted(struct ps2dev *ps2dev);

int ps2_is_keyboard_id(char id);

#endif /* _LIBPS2_H */