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/*
* Copyright 2013 GE Intelligent Platforms, Inc.
*
* 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.
*
* Minimal GPIO support.
*/
#include <common.h>
#include <errno.h>
#include <asm/io.h>
#include <mach/gpio.h>
#include <mach/immap_85xx.h>
#ifdef CONFIG_MPC8544
/* Enable all GPIO output pins */
void fsl_enable_gpiout(void)
{
void __iomem *gpiocr = IOMEM(MPC85xx_GUTS_ADDR + MPC85xx_GPIOCR_OFFSET);
out_be32(gpiocr, in_be32(gpiocr) | MPC85xx_GPIOCR_GPOUT);
}
void gpio_set_value(unsigned gpio, int val)
{
void __iomem *gpout = IOMEM(MPC85xx_GUTS_ADDR + MPC85xx_GPOUTDR_OFFSET);
int gpoutdr;
if (gpio >= 8)
return;
gpoutdr = in_be32(gpout);
if (val)
gpoutdr |= MPC85xx_GPIOBIT(gpio);
else
gpoutdr &= ~MPC85xx_GPIOBIT(gpio);
out_be32(gpout, gpoutdr);
}
#else
int gpio_direction_output(unsigned gpio, int val)
{
void __iomem *gpior = IOMEM(MPC85xx_GPIO_ADDR);
if (gpio >= 16)
return -EINVAL;
if (val)
setbits_be32(gpior + MPC85xx_GPIO_GPDAT_OFFSET,
1 << (32 - gpio));
else
clrbits_be32(gpior + MPC85xx_GPIO_GPDAT_OFFSET,
1 << (32 - gpio));
setbits_be32(gpior + MPC85xx_GPIO_GPDIR_OFFSET, 1 << (32 - gpio));
return 0;
}
#endif
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