[linux-block.git] / include / linux / 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.
 */


#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);

#endif /* _LIBPS2_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _LIBPS2_H
	2	#define _LIBPS2_H
	3
	4	/*
	5	* Copyright (C) 1999-2002 Vojtech Pavlik
	6	* Copyright (C) 2004 Dmitry Torokhov
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License version 2 as published by
	10	* the Free Software Foundation.
	11	*/
	12
	13
	14	#define PS2_CMD_GETID 0x02f2
	15	#define PS2_CMD_RESET_BAT 0x02ff
	16
	17	#define PS2_RET_BAT 0xaa
	18	#define PS2_RET_ID 0x00
	19	#define PS2_RET_ACK 0xfa
	20	#define PS2_RET_NAK 0xfe
	21
	22	#define PS2_FLAG_ACK 1 /* Waiting for ACK/NAK */
	23	#define PS2_FLAG_CMD 2 /* Waiting for command to finish */
	24	#define PS2_FLAG_CMD1 4 /* Waiting for the first byte of command response */
	25	#define PS2_FLAG_WAITID 8 /* Command execiting is GET ID */
	26
	27	struct ps2dev {
	28	struct serio *serio;
	29
	30	/* Ensures that only one command is executing at a time */
c4e32e9f	31	struct mutex cmd_mutex;
1da177e4 LT	32
	33	/* Used to signal completion from interrupt handler */
	34	wait_queue_head_t wait;
	35
	36	unsigned long flags;
	37	unsigned char cmdbuf[6];
	38	unsigned char cmdcnt;
	39	unsigned char nak;
	40	};
	41
	42	void ps2_init(struct ps2dev ps2dev, struct serio serio);
	43	int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout);
c611763d	44	void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout);
1da177e4 LT	45	int ps2_command(struct ps2dev ps2dev, unsigned char param, int command);
	46	int ps2_schedule_command(struct ps2dev ps2dev, unsigned char param, int command);
	47	int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data);
	48	int ps2_handle_response(struct ps2dev *ps2dev, unsigned char data);
	49	void ps2_cmd_aborted(struct ps2dev *ps2dev);
	50
	51	#endif /* _LIBPS2_H */