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  1. /*
  2.  * Copyright (C) 2006 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /**
  30.  * This file implements ia32 specific access to i8042 registers.
  31.  */
  32.  
  33. #ifndef __ia32_I8042_H__
  34. #define __ia32_I8042_H__
  35.  
  36. #include <arch/asm.h>
  37. #include <arch/types.h>
  38.  
  39. #define i8042_DATA      0x60
  40. #define i8042_STATUS        0x64
  41.  
  42. static inline void i8042_data_write(__u8 data)
  43. {
  44.     outb(i8042_DATA, data);
  45. }
  46.  
  47. static inline __u8 i8042_data_read(void)
  48. {
  49.     return inb(i8042_DATA);
  50. }
  51.  
  52. static inline __u8 i8042_status_read(void)
  53. {
  54.     return inb(i8042_STATUS);
  55. }
  56.  
  57. static inline void i8042_command_write(__u8 command)
  58. {
  59.     outb(i8042_STATUS, command);
  60. }
  61.  
  62. #endif
  63.