Edit File: libps2.h
#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. */ #include <linux/bitops.h> #include <linux/mutex.h> #include <linux/types.h> #include <linux/wait.h> #define PS2_CMD_SETSCALE11 0x00e6 #define PS2_CMD_SETRES 0x10e8 #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_RET_ERR 0xfc #define PS2_FLAG_ACK BIT(0) /* Waiting for ACK/NAK */ #define PS2_FLAG_CMD BIT(1) /* Waiting for a command to finish */ #define PS2_FLAG_CMD1 BIT(2) /* Waiting for the first byte of command response */ #define PS2_FLAG_WAITID BIT(3) /* Command executing is GET ID */ #define PS2_FLAG_NAK BIT(4) /* Last transmission was NAKed */ #define PS2_FLAG_ACK_CMD BIT(5) /* Waiting to ACK the command (first) byte */ 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; u8 cmdbuf[8]; u8 cmdcnt; u8 nak; }; void ps2_init(struct ps2dev *ps2dev, struct serio *serio); int ps2_sendbyte(struct ps2dev *ps2dev, u8 byte, unsigned int timeout); void ps2_drain(struct ps2dev *ps2dev, size_t maxbytes, unsigned int timeout); void ps2_begin_command(struct ps2dev *ps2dev); void ps2_end_command(struct ps2dev *ps2dev); int __ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command); int ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command); int ps2_sliced_command(struct ps2dev *ps2dev, u8 command); bool ps2_handle_ack(struct ps2dev *ps2dev, u8 data); bool ps2_handle_response(struct ps2dev *ps2dev, u8 data); void ps2_cmd_aborted(struct ps2dev *ps2dev); bool ps2_is_keyboard_id(u8 id); #endif /* _LIBPS2_H */