linux/drivers/input/serio/i8042-io.h
Martyn Welch 540c6c392f powerpc: Add i8042 keyboard and mouse irq parsing
Currently the irqs for the i8042, which historically provides keyboard and
mouse (aux) support, is hardwired in the driver rather than parsing the
dts.  This patch modifies the powerpc legacy IO code to attempt to parse
the device tree for this information, failing back to the hardcoded values
if it fails.

Signed-off-by: Martyn Welch <martyn.welch@ge.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-07-09 11:28:33 +10:00

95 lines
1.9 KiB
C

#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 */