Desktop/xinu_mips-1.0.2.tar/xinu_mips-1.0.2/include/gpio.h

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/* Embedded XINU, Copyright (C) 2007.  All rights reserved. */

#ifndef __XINU_GPIO_H__
#define __XINU_GPIO_H__

#define GPIO_BASE 0xb8000060

/* Control and status registers for the GPIO. */
struct gpio_csreg
{
        volatile unsigned long input;       
        volatile unsigned long output;      
        volatile unsigned long enable;      
        volatile unsigned long control;     
};


/* GPIO bits for pin direction */
#define GPIO_DIR_IN         0x00        
#define GPIO_DIR_OUT        0x01        
/* GPIO bit flags for pins */
#define GPIO0               0x01
#define GPIO1               0x02
#define GPIO2               0x04
#define GPIO3               0x08
#define GPIO4               0x10
#define GPIO5               0x20
#define GPIO6               0x40
#define GPIO7               0x80

#define GPIO_PIN_COUNT      8

/* LEDs */
#define GPIO_LED_WLAN       GPIO0       
#define GPIO_LED_POWER      GPIO1       
#define GPIO_LED_CISCOWHT   GPIO2       
#define GPIO_LED_CISCOONG   GPIO3       
#define GPIO_LED_DMZ        GPIO7       
/* LED control functions */
#define GPIO_CTRL_LED_ON(n) ((struct gpio_csreg *)GPIO_BASE)->enable |= n; \
                                                        ((struct gpio_csreg *)GPIO_BASE)->output &= ~n

#define GPIO_CTRL_LED_OFF(n) ((struct gpio_csreg *)GPIO_BASE)->enable &= ~n

/* Buttons */ 
#define GPIO_BUT_CISCO      GPIO4       
#define GPIO_BUT_RESET      GPIO6       
#endif

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