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/*
* arch/arm/mach-imx/gpio.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>
#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) >> GPIO_PORT_SHIFT;
unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
unsigned int aout = (gpio_mode & GPIO_AOUT_MASK) >> GPIO_AOUT_SHIFT;
unsigned int bout = (gpio_mode & GPIO_BOUT_MASK) >> GPIO_BOUT_SHIFT;
unsigned int tmp;
printf("gpio_mode: 0x%08x ocr: 0x%08x port: %d pin: %2d aout: %d bout: %d\n", gpio_mode, ocr, port, pin, aout, bout);
/* 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(!(gpio_mode & (GPIO_PF | GPIO_AF)))
GIUS(port) |= (1 << pin);
else
GIUS(port) &= ~(1 << pin);
/* Output / input configuration */
if (pin < 16) {
tmp = OCR1(port);
tmp &= ~(3 << (pin * 2));
tmp |= (ocr << (pin * 2));
OCR1(port) = tmp;
ICONFA1(port) &= ~(3 << (pin * 2));
ICONFA1(port) |= aout << (pin * 2);
ICONFB1(port) &= ~(3 << (pin * 2));
ICONFB1(port) |= bout << (pin * 2);
} else {
pin -= 16;
tmp = OCR2(port);
tmp &= ~(3 << (pin * 2));
tmp |= (ocr << (pin * 2));
OCR2(port) = tmp;
ICONFA2(port) &= ~(3 << (pin * 2));
ICONFA2(port) |= aout << (pin * 2);
ICONFB2(port) &= ~(3 << (pin * 2));
ICONFB2(port) |= bout << (pin * 2);
}
}
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