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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/input/serio/i8042-io.h
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#ifndef _I8042_IO_H

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#define _I8042_IO_H

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/*

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 * This program is free software; you can redistribute it and/or modify it

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 * under the terms of the GNU General Public License version 2 as published by

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 * the Free Software Foundation.

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 */

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/*

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 * Names.

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 */

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#define I8042_KBD_PHYS_DESC "isa0060/serio0"

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#define I8042_AUX_PHYS_DESC "isa0060/serio1"

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#define I8042_MUX_PHYS_DESC "isa0060/serio%d"

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/*

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 * IRQs.

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 */

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#ifdef __alpha__

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# define I8042_KBD_IRQ	1

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# define I8042_AUX_IRQ	(RTC_PORT(0) == 0x170 ? 9 : 12)	/* Jensen is special */

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#elif defined(__arm__)

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/* defined in include/asm-arm/arch-xxx/irqs.h */

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#include <asm/irq.h>

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#elif defined(CONFIG_SH_CAYMAN)

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#include <asm/irq.h>

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#elif defined(CONFIG_PPC)

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extern int of_i8042_kbd_irq;

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extern int of_i8042_aux_irq;

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# define I8042_KBD_IRQ  of_i8042_kbd_irq

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# define I8042_AUX_IRQ  of_i8042_aux_irq

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#else

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# define I8042_KBD_IRQ	1

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# define I8042_AUX_IRQ	12

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#endif

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/*

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 * Register numbers.

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 */

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#define I8042_COMMAND_REG	0x64

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#define I8042_STATUS_REG	0x64

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#define I8042_DATA_REG		0x60

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static inline int i8042_read_data(void)

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{

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	return inb(I8042_DATA_REG);

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}

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static inline int i8042_read_status(void)

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{

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	return inb(I8042_STATUS_REG);

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}

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static inline void i8042_write_data(int val)

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{

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	outb(val, I8042_DATA_REG);

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}

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static inline void i8042_write_command(int val)

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{

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	outb(val, I8042_COMMAND_REG);

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}

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static inline int i8042_platform_init(void)

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{

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/*

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 * On some platforms touching the i8042 data register region can do really

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 * bad things. Because of this the region is always reserved on such boxes.

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 */

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#if defined(CONFIG_PPC)

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	if (check_legacy_ioport(I8042_DATA_REG))

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		return -ENODEV;

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#endif

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#if !defined(__sh__) && !defined(__alpha__) && !defined(__mips__)

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	if (!request_region(I8042_DATA_REG, 16, "i8042"))

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		return -EBUSY;

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#endif

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	i8042_reset = 1;

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	return 0;

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}

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static inline void i8042_platform_exit(void)

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{

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#if !defined(__sh__) && !defined(__alpha__)

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	release_region(I8042_DATA_REG, 16);

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#endif

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}

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#endif /* _I8042_IO_H */

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