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#ifndef _ASM_SH_HD64465_GPIO_
#define _ASM_SH_HD64465_GPIO_ 1
/*
* $Id: gpio.h,v 1.3 2003/05/04 19:30:14 lethal Exp $
*
* Hitachi HD64465 companion chip: General Purpose IO pins support.
* This layer enables other device drivers to configure GPIO
* pins, get and set their values, and register an interrupt
* routine for when input pins change in hardware.
*
* by Greg Banks <gbanks@pocketpenguins.com>
* (c) 2000 PocketPenguins Inc.
*/
#include <asm/hd64465.h>
/* Macro to construct a portpin number (used in all
* subsequent functions) from a port letter and a pin
* number, e.g. HD64465_GPIO_PORTPIN('A', 5).
*/
#define HD64465_GPIO_PORTPIN(port,pin) (((port)-'A')<<3|(pin))
/* Pin configuration constants for _configure() */
#define HD64465_GPIO_FUNCTION2 0 /* use the pin's *other* function */
#define HD64465_GPIO_OUT 1 /* output */
#define HD64465_GPIO_IN_PULLUP 2 /* input, pull-up MOS on */
#define HD64465_GPIO_IN 3 /* input */
/* Configure a pin's direction */
extern void hd64465_gpio_configure(int portpin, int direction);
/* Get, set value */
extern void hd64465_gpio_set_pin(int portpin, unsigned int value);
extern unsigned int hd64465_gpio_get_pin(int portpin);
extern void hd64465_gpio_set_port(int port, unsigned int value);
extern unsigned int hd64465_gpio_get_port(int port);
/* mode constants for _register_irq() */
#define HD64465_GPIO_FALLING 0
#define HD64465_GPIO_RISING 1
/* Interrupt on external value change */
extern void hd64465_gpio_register_irq(int portpin, int mode,
void (*handler)(int portpin, void *dev), void *dev);
extern void hd64465_gpio_unregister_irq(int portpin);
#endif /* _ASM_SH_HD64465_GPIO_ */
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