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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
#ifndef _LIBPS2_H
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#define _LIBPS2_H
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/*
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* Copyright (C) 1999-2002 Vojtech Pavlik
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* Copyright (C) 2004 Dmitry Torokhov
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#define PS2_CMD_GETID 0x02f2
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#define PS2_CMD_RESET_BAT 0x02ff
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#define PS2_RET_BAT 0xaa
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#define PS2_RET_ID 0x00
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#define PS2_RET_ACK 0xfa
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#define PS2_RET_NAK 0xfe
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#define PS2_RET_ERR 0xfc
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#define PS2_FLAG_ACK 1 /* Waiting for ACK/NAK */
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#define PS2_FLAG_CMD 2 /* Waiting for command to finish */
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#define PS2_FLAG_CMD1 4 /* Waiting for the first byte of command response */
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#define PS2_FLAG_WAITID 8 /* Command execiting is GET ID */
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#define PS2_FLAG_NAK 16 /* Last transmission was NAKed */
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struct ps2dev {
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struct serio *serio;
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/* Ensures that only one command is executing at a time */
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struct mutex cmd_mutex;
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/* Used to signal completion from interrupt handler */
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wait_queue_head_t wait;
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unsigned long flags;
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unsigned char cmdbuf[6];
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unsigned char cmdcnt;
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unsigned char nak;
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};
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void ps2_init(struct ps2dev *ps2dev, struct serio *serio);
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int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout);
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void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout);
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int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command);
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int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data);
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int ps2_handle_response(struct ps2dev *ps2dev, unsigned char data);
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void ps2_cmd_aborted(struct ps2dev *ps2dev);
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int ps2_is_keyboard_id(char id);
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#endif /* _LIBPS2_H */
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