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#define PS2_RET_ERR		0xfc
22
23#define PS2_FLAG_ACK		1	/* Waiting for ACK/NAK */
24#define PS2_FLAG_CMD		2	/* Waiting for command to finish */
25#define PS2_FLAG_CMD1		4	/* Waiting for the first byte of command response */
26#define PS2_FLAG_WAITID		8	/* Command execiting is GET ID */
27#define PS2_FLAG_NAK		16	/* Last transmission was NAKed */
 
28
29struct ps2dev {
30	struct serio *serio;
31
32	/* Ensures that only one command is executing at a time */
33	struct mutex cmd_mutex;
34
35	/* Used to signal completion from interrupt handler */
36	wait_queue_head_t wait;
37
38	unsigned long flags;
39	unsigned char cmdbuf[8];
40	unsigned char cmdcnt;
41	unsigned char nak;
42};
43
44void ps2_init(struct ps2dev *ps2dev, struct serio *serio);
45int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout);
46void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout);
47void ps2_begin_command(struct ps2dev *ps2dev);
48void ps2_end_command(struct ps2dev *ps2dev);
49int __ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command);
50int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command);
51int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data);
52int ps2_handle_response(struct ps2dev *ps2dev, unsigned char data);
 
53void ps2_cmd_aborted(struct ps2dev *ps2dev);
54int ps2_is_keyboard_id(char id);
55
56#endif /* _LIBPS2_H */

 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#include <linux/bitops.h>
14#include <linux/mutex.h>
15#include <linux/types.h>
16#include <linux/wait.h>
17
18#define PS2_CMD_SETSCALE11	0x00e6
19#define PS2_CMD_SETRES		0x10e8
20#define PS2_CMD_GETID		0x02f2
21#define PS2_CMD_RESET_BAT	0x02ff
22
23#define PS2_RET_BAT		0xaa
24#define PS2_RET_ID		0x00
25#define PS2_RET_ACK		0xfa
26#define PS2_RET_NAK		0xfe
27#define PS2_RET_ERR		0xfc
28
29#define PS2_FLAG_ACK		BIT(0)	/* Waiting for ACK/NAK */
30#define PS2_FLAG_CMD		BIT(1)	/* Waiting for a command to finish */
31#define PS2_FLAG_CMD1		BIT(2)	/* Waiting for the first byte of command response */
32#define PS2_FLAG_WAITID		BIT(3)	/* Command executing is GET ID */
33#define PS2_FLAG_NAK		BIT(4)	/* Last transmission was NAKed */
34#define PS2_FLAG_ACK_CMD	BIT(5)	/* Waiting to ACK the command (first) byte */
35
36struct ps2dev {
37	struct serio *serio;
38
39	/* Ensures that only one command is executing at a time */
40	struct mutex cmd_mutex;
41
42	/* Used to signal completion from interrupt handler */
43	wait_queue_head_t wait;
44
45	unsigned long flags;
46	u8 cmdbuf[8];
47	u8 cmdcnt;
48	u8 nak;
49};
50
51void ps2_init(struct ps2dev *ps2dev, struct serio *serio);
52int ps2_sendbyte(struct ps2dev *ps2dev, u8 byte, unsigned int timeout);
53void ps2_drain(struct ps2dev *ps2dev, size_t maxbytes, unsigned int timeout);
54void ps2_begin_command(struct ps2dev *ps2dev);
55void ps2_end_command(struct ps2dev *ps2dev);
56int __ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command);
57int ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command);
58int ps2_sliced_command(struct ps2dev *ps2dev, u8 command);
59bool ps2_handle_ack(struct ps2dev *ps2dev, u8 data);
60bool ps2_handle_response(struct ps2dev *ps2dev, u8 data);
61void ps2_cmd_aborted(struct ps2dev *ps2dev);
62bool ps2_is_keyboard_id(u8 id);
63
64#endif /* _LIBPS2_H */