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