b28bad65c1
Instead of using unsigned char for the byte data switch to using u8. Also use unsigned int for the command codes and timeouts, and have ps2_handle_ack() and ps2_handle_response() return bool instead of int, as they do not return error codes but rather signal whether a byte was handled or not handled. ps2_is_keyboard_id() now returns bool as well. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
59 lines
1.8 KiB
C
59 lines
1.8 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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#include <linux/mutex.h>
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#include <linux/types.h>
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#include <linux/wait.h>
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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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u8 cmdbuf[8];
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u8 cmdcnt;
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u8 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, u8 byte, unsigned int timeout);
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void ps2_drain(struct ps2dev *ps2dev, size_t maxbytes, unsigned int timeout);
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void ps2_begin_command(struct ps2dev *ps2dev);
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void ps2_end_command(struct ps2dev *ps2dev);
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int __ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command);
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int ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command);
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bool ps2_handle_ack(struct ps2dev *ps2dev, u8 data);
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bool ps2_handle_response(struct ps2dev *ps2dev, u8 data);
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void ps2_cmd_aborted(struct ps2dev *ps2dev);
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bool ps2_is_keyboard_id(u8 id);
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#endif /* _LIBPS2_H */
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