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i8042.h

#ifndef _I8042_H
#define _I8042_H


/*
 *  Copyright (c) 1999-2002 Vojtech Pavlik
 *
 * 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.
 */

/*
 * Arch-dependent inline functions and defines.
 */

#if defined(CONFIG_MACH_JAZZ)
#include "i8042-jazzio.h"
#elif defined(CONFIG_SGI_IP22)
#include "i8042-ip22io.h"
#elif defined(CONFIG_PPC)
#include "i8042-ppcio.h"
#elif defined(CONFIG_SPARC)
#include "i8042-sparcio.h"
#elif defined(CONFIG_X86) || defined(CONFIG_IA64)
#include "i8042-x86ia64io.h"
#else
#include "i8042-io.h"
#endif

/*
 * This is in 50us units, the time we wait for the i8042 to react. This
 * has to be long enough for the i8042 itself to timeout on sending a byte
 * to a non-existent mouse.
 */

#define I8042_CTL_TIMEOUT     10000

/*
 * 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

/*
 * Return codes.
 */

#define I8042_RET_CTL_TEST    0x55

/*
 * Expected maximum internal i8042 buffer size. This is used for flushing
 * the i8042 buffers.
 */

#define I8042_BUFFER_SIZE     16

/*
 * Number of AUX ports on controllers supporting active multiplexing
 * specification
 */

#define I8042_NUM_MUX_PORTS   4

/*
 * Debug.
 */

#ifdef DEBUG
static unsigned long i8042_start_time;
#define dbg_init() do { i8042_start_time = jiffies; } while (0)
#define dbg(format, arg...)                                       \
      do {                                                  \
            if (i8042_debug)                                \
                  printk(KERN_DEBUG __FILE__ ": " format " [%d]\n" ,    \
                        ## arg, (int) (jiffies - i8042_start_time));    \
      } while (0)
#else
#define dbg_init() do { } while (0)
#define dbg(format, arg...) do {} while (0)
#endif

#endif /* _I8042_H */

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