i8042-io.h

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#ifndef _I8042_IO_H
#define _I8042_IO_H

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */

/*
 * Names.
 */

#define I8042_KBD_PHYS_DESC "isa0060/serio0"
#define I8042_AUX_PHYS_DESC "isa0060/serio1"
#define I8042_MUX_PHYS_DESC "isa0060/serio%d"

/*
 * IRQs.
 */

#ifdef __alpha__
# define I8042_KBD_IRQ  1
# define I8042_AUX_IRQ  (RTC_PORT(0) == 0x170 ? 9 : 12) /* Jensen is special */
#elif defined(__arm__)
/* defined in include/asm-arm/arch-xxx/irqs.h */
#include <asm/irq.h>
#elif defined(CONFIG_SH_CAYMAN)
#include <asm/irq.h>
#elif defined(CONFIG_PPC)
extern int of_i8042_kbd_irq;
extern int of_i8042_aux_irq;
# define I8042_KBD_IRQ  of_i8042_kbd_irq
# define I8042_AUX_IRQ  of_i8042_aux_irq
#else
# define I8042_KBD_IRQ  1
# define I8042_AUX_IRQ  12
#endif


/*
 * Register numbers.
 */

#define I8042_COMMAND_REG   0x64
#define I8042_STATUS_REG    0x64
#define I8042_DATA_REG      0x60

static inline int i8042_read_data(void)
{
    return inb(I8042_DATA_REG);
}

static inline int i8042_read_status(void)
{
    return inb(I8042_STATUS_REG);
}

static inline void i8042_write_data(int val)
{
    outb(val, I8042_DATA_REG);
}

static inline void i8042_write_command(int val)
{
    outb(val, I8042_COMMAND_REG);
}

static inline int i8042_platform_init(void)
{
/*
 * On some platforms touching the i8042 data register region can do really
 * bad things. Because of this the region is always reserved on such boxes.
 */
#if defined(CONFIG_PPC)
    if (check_legacy_ioport(I8042_DATA_REG))
        return -ENODEV;
#endif
#if !defined(__sh__) && !defined(__alpha__) && !defined(__mips__)
    if (!request_region(I8042_DATA_REG, 16, "i8042"))
        return -EBUSY;
#endif

    i8042_reset = 1;
    return 0;
}

static inline void i8042_platform_exit(void)
{
#if !defined(__sh__) && !defined(__alpha__)
    release_region(I8042_DATA_REG, 16);
#endif
}

#endif /* _I8042_IO_H */