| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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_ */ |