553a05b882
Export the i8042_command() function which manages the mutual exclusion with the help of the i8042_lock spinlock. This allows to access i8042 safely from other parts of the kernel. Signed-off-by: Márton Németh <nm127@freemail.hu> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
101 lines
2.1 KiB
C
101 lines
2.1 KiB
C
#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_IP22)
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#include "i8042-ip22io.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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#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 __FILE__ ": " format " [%d]\n" , \
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## arg, (int) (jiffies - i8042_start_time)); \
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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...) do {} while (0)
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#endif
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#endif /* _I8042_H */
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