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#ifndef _ASM_SH_HD64465_GPIO_ #define _ASM_SH_HD64465_GPIO_ 1 /* * $Id: hd64465_gpio.h,v 1.2 2001/05/24 00:14:13 gniibe Exp $ * * Hitachi HD64465 companion chip: General Purpose IO pins support. * This layer enables other device drivers to configure GPIO * pins, get and set their values, and register an interrupt * routine for when input pins change in hardware. * * by Greg Banks <gbanks@pocketpenguins.com> * (c) 2000 PocketPenguins Inc. */ #include <asm/hd64465.h> /* Macro to construct a portpin number (used in all * subsequent functions) from a port letter and a pin * number, e.g. HD64465_GPIO_PORTPIN('A', 5). */ #define HD64465_GPIO_PORTPIN(port,pin) (((port)-'A')<<3|(pin)) /* Pin configuration constants for _configure() */ #define HD64465_GPIO_FUNCTION2 0 /* use the pin's *other* function */ #define HD64465_GPIO_OUT 1 /* output */ #define HD64465_GPIO_IN_PULLUP 2 /* input, pull-up MOS on */ #define HD64465_GPIO_IN 3 /* input */ /* Configure a pin's direction */ extern void hd64465_gpio_configure(int portpin, int direction); /* Get, set value */ extern void hd64465_gpio_set_pin(int portpin, unsigned int value); extern unsigned int hd64465_gpio_get_pin(int portpin); extern void hd64465_gpio_set_port(int port, unsigned int value); extern unsigned int hd64465_gpio_get_port(int port); /* mode constants for _register_irq() */ #define HD64465_GPIO_FALLING 0 #define HD64465_GPIO_RISING 1 /* Interrupt on external value change */ extern void hd64465_gpio_register_irq(int portpin, int mode, void (*handler)(int portpin, void *dev), void *dev); extern void hd64465_gpio_unregister_irq(int portpin); #endif /* _ASM_SH_HD64465_GPIO_ */ |