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_SUPERH64)
  29 #include <asm/irq.h>
  30 #else
  31 # define I8042_KBD_IRQ  1
  32 # define I8042_AUX_IRQ  12
  33 #endif
  34
  35
  36 /*
  37  * Register numbers.
  38  */
  39
  40 #define I8042_COMMAND_REG       0x64
  41 #define I8042_STATUS_REG        0x64
  42 #define I8042_DATA_REG          0x60
  43
  44 static inline int i8042_read_data(void)
  45 {
  46         return inb(I8042_DATA_REG);
  47 }
  48
  49 static inline int i8042_read_status(void)
  50 {
  51         return inb(I8042_STATUS_REG);
  52 }
  53
  54 static inline void i8042_write_data(int val)
  55 {
  56         outb(val, I8042_DATA_REG);
  57 }
  58
  59 static inline void i8042_write_command(int val)
  60 {
  61         outb(val, I8042_COMMAND_REG);
  62 }
  63
  64 static inline int i8042_platform_init(void)
  65 {
  66 /*
  67  * On some platforms touching the i8042 data register region can do really
  68  * bad things. Because of this the region is always reserved on such boxes.
  69  */
  70 #if !defined(__sh__) && !defined(__alpha__) && !defined(__mips__) && !defined(CONFIG_PPC_MERGE)
  71         if (!request_region(I8042_DATA_REG, 16, "i8042"))
  72                 return -EBUSY;
  73 #endif
  74
  75         i8042_reset = 1;
  76
  77 #if defined(CONFIG_PPC_MERGE)
  78         if (check_legacy_ioport(I8042_DATA_REG))
  79                 return -EBUSY;
  80         if (!request_region(I8042_DATA_REG, 16, "i8042"))
  81                 return -EBUSY;
  82 #endif
  83         return 0;
  84 }
  85
  86 static inline void i8042_platform_exit(void)
  87 {
  88 #if !defined(__sh__) && !defined(__alpha__) && !defined(CONFIG_PPC64)
  89         release_region(I8042_DATA_REG, 16);
  90 #endif
  91 }
  92
  93 #endif /* _I8042_IO_H */