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Diffstat (limited to 'include/asm-sh/hd64465/gpio.h')
| -rw-r--r-- | include/asm-sh/hd64465/gpio.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/include/asm-sh/hd64465/gpio.h b/include/asm-sh/hd64465/gpio.h new file mode 100644 index 00000000000..a3cdca2713d --- /dev/null +++ b/include/asm-sh/hd64465/gpio.h @@ -0,0 +1,46 @@ +#ifndef _ASM_SH_HD64465_GPIO_ +#define _ASM_SH_HD64465_GPIO_ 1 +/* + * $Id: gpio.h,v 1.3 2003/05/04 19:30:14 lethal 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_ */ |