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_SH_CAYMAN)
  25#include <asm/irq.h>
  26#elif defined(CONFIG_PPC)
  27extern int of_i8042_kbd_irq;
  28extern int of_i8042_aux_irq;
  29# define I8042_KBD_IRQ  of_i8042_kbd_irq
  30# define I8042_AUX_IRQ  of_i8042_aux_irq
  31#else
  32# define I8042_KBD_IRQ  1
  33# define I8042_AUX_IRQ  12
  34#endif
  35
  36
  37/*
  38 * Register numbers.
  39 */
  40
  41#define I8042_COMMAND_REG       0x64
  42#define I8042_STATUS_REG        0x64
  43#define I8042_DATA_REG          0x60
  44
  45static inline int i8042_read_data(void)
  46{
  47        return inb(I8042_DATA_REG);
  48}
  49
  50static inline int i8042_read_status(void)
  51{
  52        return inb(I8042_STATUS_REG);
  53}
  54
  55static inline void i8042_write_data(int val)
  56{
  57        outb(val, I8042_DATA_REG);
  58}
  59
  60static inline void i8042_write_command(int val)
  61{
  62        outb(val, I8042_COMMAND_REG);
  63}
  64
  65static inline int i8042_platform_init(void)
  66{
  67/*
  68 * On some platforms touching the i8042 data register region can do really
  69 * bad things. Because of this the region is always reserved on such boxes.
  70 */
  71#if defined(CONFIG_PPC)
  72        if (check_legacy_ioport(I8042_DATA_REG))
  73                return -ENODEV;
  74#endif
  75#if !defined(__sh__) && !defined(__alpha__)
  76        if (!request_region(I8042_DATA_REG, 16, "i8042"))
  77                return -EBUSY;
  78#endif
  79
  80        i8042_reset = I8042_RESET_ALWAYS;
  81        return 0;
  82}
  83
  84static inline void i8042_platform_exit(void)
  85{
  86#if !defined(__sh__) && !defined(__alpha__)
  87        release_region(I8042_DATA_REG, 16);
  88#endif
  89}
  90
  91#endif /* _I8042_IO_H */
  92