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Linux kernel mirror (for testing)
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linux
1#ifndef _ASM_SH_HD64465_GPIO_
2#define _ASM_SH_HD64465_GPIO_ 1
3/*
4 * $Id: gpio.h,v 1.3 2003/05/04 19:30:14 lethal Exp $
5 *
6 * Hitachi HD64465 companion chip: General Purpose IO pins support.
7 * This layer enables other device drivers to configure GPIO
8 * pins, get and set their values, and register an interrupt
9 * routine for when input pins change in hardware.
10 *
11 * by Greg Banks <gbanks@pocketpenguins.com>
12 * (c) 2000 PocketPenguins Inc.
13 */
14#include <asm/hd64465.h>
15
16/* Macro to construct a portpin number (used in all
17 * subsequent functions) from a port letter and a pin
18 * number, e.g. HD64465_GPIO_PORTPIN('A', 5).
19 */
20#define HD64465_GPIO_PORTPIN(port,pin) (((port)-'A')<<3|(pin))
21
22/* Pin configuration constants for _configure() */
23#define HD64465_GPIO_FUNCTION2 0 /* use the pin's *other* function */
24#define HD64465_GPIO_OUT 1 /* output */
25#define HD64465_GPIO_IN_PULLUP 2 /* input, pull-up MOS on */
26#define HD64465_GPIO_IN 3 /* input */
27
28/* Configure a pin's direction */
29extern void hd64465_gpio_configure(int portpin, int direction);
30
31/* Get, set value */
32extern void hd64465_gpio_set_pin(int portpin, unsigned int value);
33extern unsigned int hd64465_gpio_get_pin(int portpin);
34extern void hd64465_gpio_set_port(int port, unsigned int value);
35extern unsigned int hd64465_gpio_get_port(int port);
36
37/* mode constants for _register_irq() */
38#define HD64465_GPIO_FALLING 0
39#define HD64465_GPIO_RISING 1
40
41/* Interrupt on external value change */
42extern void hd64465_gpio_register_irq(int portpin, int mode,
43 void (*handler)(int portpin, void *dev), void *dev);
44extern void hd64465_gpio_unregister_irq(int portpin);
45
46#endif /* _ASM_SH_HD64465_GPIO_ */