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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/input/serio/i8042.h
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#ifndef _I8042_H

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#define _I8042_H

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/*

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 *  Copyright (c) 1999-2002 Vojtech Pavlik

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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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/*

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 * Arch-dependent inline functions and defines.

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 */

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#if defined(CONFIG_MACH_JAZZ)

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#include "i8042-jazzio.h"

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#elif defined(CONFIG_SGI_HAS_I8042)

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#include "i8042-ip22io.h"

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#elif defined(CONFIG_SNI_RM)

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#include "i8042-snirm.h"

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#elif defined(CONFIG_PPC)

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#include "i8042-ppcio.h"

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#elif defined(CONFIG_SPARC)

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#include "i8042-sparcio.h"

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#elif defined(CONFIG_X86) || defined(CONFIG_IA64)

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#include "i8042-x86ia64io.h"

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#elif defined(CONFIG_UNICORE32)

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#include "i8042-unicore32io.h"

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#else

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#include "i8042-io.h"

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#endif

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/*

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 * This is in 50us units, the time we wait for the i8042 to react. This

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 * has to be long enough for the i8042 itself to timeout on sending a byte

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 * to a non-existent mouse.

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 */

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#define I8042_CTL_TIMEOUT	10000

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/*

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 * Status register bits.

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 */

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#define I8042_STR_PARITY	0x80

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#define I8042_STR_TIMEOUT	0x40

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#define I8042_STR_AUXDATA	0x20

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#define I8042_STR_KEYLOCK	0x10

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#define I8042_STR_CMDDAT	0x08

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#define I8042_STR_MUXERR	0x04

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#define I8042_STR_IBF		0x02

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#define	I8042_STR_OBF		0x01

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/*

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 * Control register bits.

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 */

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#define I8042_CTR_KBDINT	0x01

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#define I8042_CTR_AUXINT	0x02

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#define I8042_CTR_IGNKEYLOCK	0x08

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#define I8042_CTR_KBDDIS	0x10

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#define I8042_CTR_AUXDIS	0x20

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#define I8042_CTR_XLATE		0x40

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/*

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 * Return codes.

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 */

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#define I8042_RET_CTL_TEST	0x55

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/*

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

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 * the i8042 buffers.

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 */

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#define I8042_BUFFER_SIZE	16

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/*

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 * Number of AUX ports on controllers supporting active multiplexing

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 * specification

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 */

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#define I8042_NUM_MUX_PORTS	4

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/*

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 * Debug.

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 */

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#ifdef DEBUG

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static unsigned long i8042_start_time;

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#define dbg_init() do { i8042_start_time = jiffies; } while (0)

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#define dbg(format, arg...)							\

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	do {									\

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		if (i8042_debug)						\

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			printk(KERN_DEBUG KBUILD_MODNAME ": [%d] " format,	\

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			       (int) (jiffies - i8042_start_time), ##arg);	\

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	} while (0)

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#else

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#define dbg_init() do { } while (0)

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#define dbg(format, arg...)							\

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	do {									\

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		if (0)								\

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			printk(KERN_DEBUG pr_fmt(format), ##arg);		\

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	} while (0)

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#endif

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#endif /* _I8042_H */

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