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 /* defined in include/asm-arm/arch-xxx/irqs.h */
  27 #include <asm/irq.h>
  28 #elif defined(CONFIG_SH_CAYMAN)
  29 #include <asm/irq.h>
  30 #elif defined(CONFIG_PPC)
  31 extern int of_i8042_kbd_irq;
  32 extern int of_i8042_aux_irq;
  33 # define I8042_KBD_IRQ  of_i8042_kbd_irq
  34 # define I8042_AUX_IRQ  of_i8042_aux_irq
  35 #else
  36 # define I8042_KBD_IRQ  1
  37 # define I8042_AUX_IRQ  12
  38 #endif
  39
  40
  41 /*
  42  * Register numbers.
  43  */
  44
  45 #define I8042_COMMAND_REG       0x64
  46 #define I8042_STATUS_REG        0x64
  47 #define I8042_DATA_REG          0x60
  48
  49 static inline int i8042_read_data(void)
  50 {
  51         return inb(I8042_DATA_REG);
  52 }
  53
  54 static inline int i8042_read_status(void)
  55 {
  56         return inb(I8042_STATUS_REG);
  57 }
  58
  59 static inline void i8042_write_data(int val)
  60 {
  61         outb(val, I8042_DATA_REG);
  62 }
  63
  64 static inline void i8042_write_command(int val)
  65 {
  66         outb(val, I8042_COMMAND_REG);
  67 }
  68
  69 static inline int i8042_platform_init(void)
  70 {
  71 /*
  72  * On some platforms touching the i8042 data register region can do really
  73  * bad things. Because of this the region is always reserved on such boxes.
  74  */
  75 #if defined(CONFIG_PPC)
  76         if (check_legacy_ioport(I8042_DATA_REG))
  77                 return -ENODEV;
  78 #endif
  79 #if !defined(__sh__) && !defined(__alpha__)
  80         if (!request_region(I8042_DATA_REG, 16, "i8042"))
  81                 return -EBUSY;
  82 #endif
  83
  84         i8042_reset = 1;
  85         return 0;
  86 }
  87
  88 static inline void i8042_platform_exit(void)
  89 {
  90 #if !defined(__sh__) && !defined(__alpha__)
  91         release_region(I8042_DATA_REG, 16);
  92 #endif
  93 }
  94
  95 #endif /* _I8042_IO_H */