LXR linux/drivers/input/serio/i8042-io.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2#ifndef _I8042_IO_H
   3#define _I8042_IO_H
   4
   5
   6/*
   7 * Names.
   8 */
   9
  10#define I8042_KBD_PHYS_DESC "isa0060/serio0"
  11#define I8042_AUX_PHYS_DESC "isa0060/serio1"
  12#define I8042_MUX_PHYS_DESC "isa0060/serio%d"
  13
  14/*
  15 * IRQs.
  16 */
  17
  18#ifdef __alpha__
  19# define I8042_KBD_IRQ  1
  20# define I8042_AUX_IRQ  (RTC_PORT(0) == 0x170 ? 9 : 12) /* Jensen is special */
  21#elif defined(__arm__)
  22/* defined in include/asm-arm/arch-xxx/irqs.h */
  23#include <asm/irq.h>
  24#elif defined(CONFIG_PPC)
  25extern int of_i8042_kbd_irq;
  26extern int of_i8042_aux_irq;
  27# define I8042_KBD_IRQ  of_i8042_kbd_irq
  28# define I8042_AUX_IRQ  of_i8042_aux_irq
  29#else
  30# define I8042_KBD_IRQ  1
  31# define I8042_AUX_IRQ  12
  32#endif
  33
  34
  35/*
  36 * Register numbers.
  37 */
  38
  39#define I8042_COMMAND_REG       0x64
  40#define I8042_STATUS_REG        0x64
  41#define I8042_DATA_REG          0x60
  42
  43static inline int i8042_read_data(void)
  44{
  45        return inb(I8042_DATA_REG);
  46}
  47
  48static inline int i8042_read_status(void)
  49{
  50        return inb(I8042_STATUS_REG);
  51}
  52
  53static inline void i8042_write_data(int val)
  54{
  55        outb(val, I8042_DATA_REG);
  56}
  57
  58static inline void i8042_write_command(int val)
  59{
  60        outb(val, I8042_COMMAND_REG);
  61}
  62
  63static inline int i8042_platform_init(void)
  64{
  65/*
  66 * On some platforms touching the i8042 data register region can do really
  67 * bad things. Because of this the region is always reserved on such boxes.
  68 */
  69#if defined(CONFIG_PPC)
  70        if (check_legacy_ioport(I8042_DATA_REG))
  71                return -ENODEV;
  72#endif
  73#if !defined(__sh__) && !defined(__alpha__)
  74        if (!request_region(I8042_DATA_REG, 16, "i8042"))
  75                return -EBUSY;
  76#endif
  77
  78        i8042_reset = I8042_RESET_ALWAYS;
  79        return 0;
  80}
  81
  82static inline void i8042_platform_exit(void)
  83{
  84#if !defined(__sh__) && !defined(__alpha__)
  85        release_region(I8042_DATA_REG, 16);
  86#endif
  87}
  88
  89#endif /* _I8042_IO_H */
  90