include/asm-sh/hd64465/gpio.h

   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 */
  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_  */