root/include/linux/i8042.h

DEFINITIONS

1. i8042_lock_chip
2. i8042_unlock_chip
3. i8042_command
4. i8042_check_port_owner
5. i8042_install_filter
6. i8042_remove_filter

#ifndef _LINUX_I8042_H
#define _LINUX_I8042_H

/*
 * 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.
 */

#include <linux/types.h>

/*
 * Standard commands.
 */

#define I8042_CMD_CTL_RCTR      0x0120
#define I8042_CMD_CTL_WCTR      0x1060
#define I8042_CMD_CTL_TEST      0x01aa

#define I8042_CMD_KBD_DISABLE   0x00ad
#define I8042_CMD_KBD_ENABLE    0x00ae
#define I8042_CMD_KBD_TEST      0x01ab
#define I8042_CMD_KBD_LOOP      0x11d2

#define I8042_CMD_AUX_DISABLE   0x00a7
#define I8042_CMD_AUX_ENABLE    0x00a8
#define I8042_CMD_AUX_TEST      0x01a9
#define I8042_CMD_AUX_SEND      0x10d4
#define I8042_CMD_AUX_LOOP      0x11d3

#define I8042_CMD_MUX_PFX       0x0090
#define I8042_CMD_MUX_SEND      0x1090

/*
 * Status register bits.
 */

#define I8042_STR_PARITY        0x80
#define I8042_STR_TIMEOUT       0x40
#define I8042_STR_AUXDATA       0x20
#define I8042_STR_KEYLOCK       0x10
#define I8042_STR_CMDDAT        0x08
#define I8042_STR_MUXERR        0x04
#define I8042_STR_IBF           0x02
#define I8042_STR_OBF           0x01

/*
 * Control register bits.
 */

#define I8042_CTR_KBDINT        0x01
#define I8042_CTR_AUXINT        0x02
#define I8042_CTR_IGNKEYLOCK    0x08
#define I8042_CTR_KBDDIS        0x10
#define I8042_CTR_AUXDIS        0x20
#define I8042_CTR_XLATE         0x40

struct serio;

#if defined(CONFIG_SERIO_I8042) || defined(CONFIG_SERIO_I8042_MODULE)

void i8042_lock_chip(void);
void i8042_unlock_chip(void);
int i8042_command(unsigned char *param, int command);
bool i8042_check_port_owner(const struct serio *);
int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str,
                                        struct serio *serio));
int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str,
                                       struct serio *serio));

#else

static inline void i8042_lock_chip(void)
{
}

static inline void i8042_unlock_chip(void)
{
}

static inline int i8042_command(unsigned char *param, int command)
{
        return -ENODEV;
}

static inline bool i8042_check_port_owner(const struct serio *serio)
{
        return false;
}

static inline int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str,
                                        struct serio *serio))
{
        return -ENODEV;
}

static inline int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str,
                                       struct serio *serio))
{
        return -ENODEV;
}

#endif

#endif