File: /usr/src/linux/include/asm-sh/hd64465_gpio.h

1     #ifndef _ASM_SH_HD64465_GPIO_
2     #define _ASM_SH_HD64465_GPIO_ 1
3     /*
4      * $Id: hd64465_gpio.h,v 1.2 2001/05/24 00:14:13 gniibe 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 */
29     extern void hd64465_gpio_configure(int portpin, int direction);
30     
31     /* Get, set value */
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);
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 */
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);
45     
46     #endif /* _ASM_SH_HD64465_GPIO_  */
47