1 #ifndef _ASM_SH_HD64465_GPIO_
2 #define _ASM_SH_HD64465_GPIO_ 1
4 * $Id: gpio.h,v 1.3 2003/05/04 19:30:14 lethal Exp $
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.
11 * by Greg Banks <gbanks@pocketpenguins.com>
12 * (c) 2000 PocketPenguins Inc.
14 #include <asm/hd64465.h>
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).
20 #define HD64465_GPIO_PORTPIN(port,pin) (((port)-'A')<<3|(pin))
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 */
28 /* Configure a pin's direction */
29 extern void hd64465_gpio_configure(int portpin, int direction);
32 extern void hd64465_gpio_set_pin(int portpin, unsigned int value);
33 extern unsigned int hd64465_gpio_get_pin(int portpin);
34 extern void hd64465_gpio_set_port(int port, unsigned int value);
35 extern unsigned int hd64465_gpio_get_port(int port);
37 /* mode constants for _register_irq() */
38 #define HD64465_GPIO_FALLING 0
39 #define HD64465_GPIO_RISING 1
41 /* Interrupt on external value change */
42 extern void hd64465_gpio_register_irq(int portpin, int mode,
43 void (*handler)(int portpin, void *dev), void *dev);
44 extern void hd64465_gpio_unregister_irq(int portpin);
46 #endif /* _ASM_SH_HD64465_GPIO_ */