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/*
* Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
/*!
*@file mach-mx27/gpio_mux.h
*@brief This file contains the private definition .
* @ingroup GPIO_MX27
*/
#ifndef __ARCH_ARM_MACH_MX27_GPIO_MUX_H__
#define __ARCH_ARM_MACH_MX27_GPIO_MUX_H__
#include "mx27_pins.h"
typedef unsigned int iomux_pin_name_t;
/*!
* This enumeration data type defines the modes of the pin .
* GPIO_MUX_PRIMARY is the primary mode.
* GPIO_MUX_ALT is the alternate mode.
* GPIO_MUX_GPIO is the output mode and the signal source is data register.
* GPIO_MUX_INPUT1 is the input mode and the signal destination is A_OUT.
* GPIO_MUX_INPUT2 is the input mode and the signal destination is B_OUT.
* GPIO_MUX_OUTPUT1 is the output mode and the signal destination is A_IN.
* GPIO_MUX_OUTPUT2 is the output mode and the signal destination is B_IN.
* GPIO_MUX_OUTPUT3 is the output mode and the signal destination is C_IN.
*/
typedef enum {
GPIO_MUX_PRIMARY,
GPIO_MUX_ALT,
GPIO_MUX_GPIO,
GPIO_MUX_INPUT1,
GPIO_MUX_INPUT2,
GPIO_MUX_OUTPUT1,
GPIO_MUX_OUTPUT2,
GPIO_MUX_OUTPUT3,
} gpio_mux_mode_t;
/*!
* This function is just used to request a pin and configure it.
* @param pin a pin number as defined in \b #iomux_pin_name_t
* @param mode a module as define in \b #gpio_mux_mode_t;
* @return 0 if successful, Non-zero otherwise
*/
extern int gpio_request_mux(iomux_pin_name_t pin, gpio_mux_mode_t mode);
/*!
* This function is just used to configure a pin .
* @param pin a pin number as defined in \b #iomux_pin_name_t
* @param mode a module as define in \b #gpio_mux_mode_t;
* @return 0 if successful, Non-zero otherwise
*/
extern int gpio_config_mux(iomux_pin_name_t pin, gpio_mux_mode_t mode);
/*!
* This function is just used to enable or disable the pull up feature .
* @param pin a pin number as defined in \b #iomux_pin_name_t
* @param en 0 if disable, Non-zero enable
* @return 0 if successful, Non-zero otherwise
*/
extern int gpio_set_puen(iomux_pin_name_t pin, bool en);
/*!
* This function is just used to release a pin.
* @param pin a pin number as defined in \b #iomux_pin_name_t
* @return none
*/
extern void gpio_free_mux(iomux_pin_name_t pin);
#endif /* __ARCH_ARM_MACH_MX27_GPIO_MUX_H__ */
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