release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/input/serio/i8042-io.h

   1 #ifndef _I8042_IO_H
   2 #define _I8042_IO_H
   3
   4 /*
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  */
   9
  10 /*
  11  * Names.
  12  */
  13
  14 #define I8042_KBD_PHYS_DESC "isa0060/serio0"
  15 #define I8042_AUX_PHYS_DESC "isa0060/serio1"
  16 #define I8042_MUX_PHYS_DESC "isa0060/serio%d"
  17
  18 /*
  19  * IRQs.
  20  */
  21
  22 #ifdef __alpha__
  23 # define I8042_KBD_IRQ  1
  24 # define I8042_AUX_IRQ  (RTC_PORT(0) == 0x170 ? 9 : 12) /* Jensen is special */
  25 #elif defined(__arm__)
  26 #include <asm/irq.h>
  27 #elif defined(CONFIG_SH_CAYMAN)
  28 #include <asm/irq.h>
  29 #elif defined(CONFIG_PPC)
  30 extern int of_i8042_kbd_irq;
  31 extern int of_i8042_aux_irq;
  32 # define I8042_KBD_IRQ  of_i8042_kbd_irq
  33 # define I8042_AUX_IRQ  of_i8042_aux_irq
  34 #else
  35 # define I8042_KBD_IRQ  1
  36 # define I8042_AUX_IRQ  12
  37 #endif
  38
  39
  40 /*
  41  * Register numbers.
  42  */
  43
  44 #define I8042_COMMAND_REG       0x64
  45 #define I8042_STATUS_REG        0x64
  46 #define I8042_DATA_REG          0x60
  47
  48 static inline int i8042_read_data(void)
  49 {
  50         return inb(I8042_DATA_REG);
  51 }
  52
  53 static inline int i8042_read_status(void)
  54 {
  55         return inb(I8042_STATUS_REG);
  56 }
  57
  58 static inline void i8042_write_data(int val)
  59 {
  60         outb(val, I8042_DATA_REG);
  61 }
  62
  63 static inline void i8042_write_command(int val)
  64 {
  65         outb(val, I8042_COMMAND_REG);
  66 }
  67
  68 static inline int i8042_platform_init(void)
  69 {
  70 /*
  71  * On some platforms touching the i8042 data register region can do really
  72  * bad things. Because of this the region is always reserved on such boxes.
  73  */
  74 #if defined(CONFIG_PPC)
  75         if (check_legacy_ioport(I8042_DATA_REG))
  76                 return -ENODEV;
  77 #endif
  78 #if !defined(__sh__) && !defined(__alpha__) && !defined(__mips__)
  79         if (!request_region(I8042_DATA_REG, 16, "i8042"))
  80                 return -EBUSY;
  81 #endif
  82
  83         i8042_reset = 1;
  84         return 0;
  85 }
  86
  87 static inline void i8042_platform_exit(void)
  88 {
  89 #if !defined(__sh__) && !defined(__alpha__)
  90         release_region(I8042_DATA_REG, 16);
  91 #endif
  92 }
  93
  94 #endif /* _I8042_IO_H */