| /* |
| * arch/arm/mach-ixp2000/include/mach/gpio.h |
| * |
| * Copyright (C) 2002 Intel Corporation. |
| * |
| * This program is free software, you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| /* |
| * IXP2000 GPIO in/out, edge/level detection for IRQs: |
| * IRQs are generated on Falling-edge, Rising-Edge, Level-low, Level-High |
| * or both Falling-edge and Rising-edge. |
| * This must be called *before* the corresponding IRQ is registerd. |
| * Use this instead of directly setting the GPIO registers. |
| * GPIOs may also be used as GPIOs (e.g. for emulating i2c/smb) |
| */ |
| #ifndef __ASM_ARCH_GPIO_H |
| #define __ASM_ARCH_GPIO_H |
| |
| #ifndef __ASSEMBLY__ |
| |
| #define GPIO_IN 0 |
| #define GPIO_OUT 1 |
| |
| #define IXP2000_GPIO_LOW 0 |
| #define IXP2000_GPIO_HIGH 1 |
| |
| extern void gpio_line_config(int line, int direction); |
| |
| static inline int gpio_line_get(int line) |
| { |
| return (((*IXP2000_GPIO_PLR) >> line) & 1); |
| } |
| |
| static inline void gpio_line_set(int line, int value) |
| { |
| if (value == IXP2000_GPIO_HIGH) { |
| ixp2000_reg_write(IXP2000_GPIO_POSR, 1 << line); |
| } else if (value == IXP2000_GPIO_LOW) { |
| ixp2000_reg_write(IXP2000_GPIO_POCR, 1 << line); |
| } |
| } |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #endif /* ASM_ARCH_IXP2000_GPIO_H_ */ |
