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/*
* arch/arm/mach-imx/generic.c
*
* author: Sascha Hauer
* Created: april 20th, 2004
* Copyright: Synertronixx GmbH
*
* Common code for i.MX machines
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <common.h>
#ifdef CONFIG_IMX
#include <asm/arch/imx-regs.h>
void imx_gpio_mode(int gpio_mode)
{
unsigned int pin = gpio_mode & GPIO_PIN_MASK;
unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> 5;
unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> 10;
unsigned int tmp;
/* Pullup enable */
if(gpio_mode & GPIO_PUEN)
PUEN(port) |= (1<<pin);
else
PUEN(port) &= ~(1<<pin);
/* Data direction */
if(gpio_mode & GPIO_OUT)
DDIR(port) |= 1<<pin;
else
DDIR(port) &= ~(1<<pin);
/* Primary / alternate function */
if(gpio_mode & GPIO_AF)
GPR(port) |= (1<<pin);
else
GPR(port) &= ~(1<<pin);
/* use as gpio? */
if( ocr == 3 )
GIUS(port) |= (1<<pin);
else
GIUS(port) &= ~(1<<pin);
/* Output / input configuration */
/* FIXME: I'm not very sure about OCR and ICONF, someone
* should have a look over it
*/
if(pin<16) {
tmp = OCR1(port);
tmp &= ~( 3<<(pin*2));
tmp |= (ocr << (pin*2));
OCR1(port) = tmp;
if( gpio_mode & GPIO_AOUT )
ICONFA1(port) &= ~( 3<<(pin*2));
if( gpio_mode & GPIO_BOUT )
ICONFB1(port) &= ~( 3<<(pin*2));
} else {
tmp = OCR2(port);
tmp &= ~( 3<<((pin-16)*2));
tmp |= (ocr << ((pin-16)*2));
OCR2(port) = tmp;
if( gpio_mode & GPIO_AOUT )
ICONFA2(port) &= ~( 3<<((pin-16)*2));
if( gpio_mode & GPIO_BOUT )
ICONFB2(port) &= ~( 3<<((pin-16)*2));
}
}
#endif /* CONFIG_IMX */
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