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linux-next/include/linux/libps2.h
Dmitry Torokhov c611763d04 Input: add ps2_drain() to libps2 to allow reading and discarding
given number of bytes from device. Change ps2_command to
       allow using 0 as command ID and actually pass it to the
       device instead of working as a drain.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2005-06-01 02:39:51 -05:00

52 lines
1.6 KiB
C

#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 semaphore cmd_sem;
/* 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);
#endif /* _LIBPS2_H */