kernel/arch/ia32/include/drivers/i8042.h

   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 /** @addtogroup ia32
  30  * @{
  31  */
  32 /** @file
  33  */
  34
  35 /**
  36  * This file implements ia32 specific access to i8042 registers.
  37  */
  38
  39 #ifndef KERN_ia32_I8042_H_
  40 #define KERN_ia32_I8042_H_
  41
  42 #include <arch/asm.h>
  43 #include <arch/types.h>
  44
  45 #define i8042_DATA              0x60
  46 #define i8042_STATUS            0x64
  47
  48 static inline void i8042_data_write(uint8_t data)
  49 {
  50         outb(i8042_DATA, data);
  51 }
  52
  53 static inline uint8_t i8042_data_read(void)
  54 {
  55         return inb(i8042_DATA);
  56 }
  57
  58 static inline uint8_t i8042_status_read(void)
  59 {
  60         return inb(i8042_STATUS);
  61 }
  62
  63 static inline void i8042_command_write(uint8_t command)
  64 {
  65         outb(i8042_STATUS, command);
  66 }
  67
  68 #endif
  69
  70 /** @}
  71  */