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/*
* Copyright (C) 2006 Atmel Corporation
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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/io.h>
#include <asm/arch/gpio.h>
#include <asm/arch/memory-map.h>
#include "pio2.h"
void gpio_select_periph_A(unsigned int pin, int use_pullup)
{
void *base = gpio_pin_to_addr(pin);
uint32_t mask = 1 << (pin & 0x1f);
if (!base)
panic("Invalid GPIO pin %u\n", pin);
pio2_writel(base, ASR, mask);
pio2_writel(base, PDR, mask);
if (use_pullup)
pio2_writel(base, PUER, mask);
else
pio2_writel(base, PUDR, mask);
}
void gpio_select_periph_B(unsigned int pin, int use_pullup)
{
void *base = gpio_pin_to_addr(pin);
uint32_t mask = 1 << (pin & 0x1f);
if (!base)
panic("Invalid GPIO pin %u\n", pin);
pio2_writel(base, BSR, mask);
pio2_writel(base, PDR, mask);
if (use_pullup)
pio2_writel(base, PUER, mask);
else
pio2_writel(base, PUDR, mask);
}
void gpio_select_pio(unsigned int pin, unsigned long gpiof_flags)
{
void *base = gpio_pin_to_addr(pin);
uint32_t mask = 1 << (pin & 0x1f);
if (!base)
panic("Invalid GPIO pin %u\n", pin);
if (gpiof_flags & GPIOF_OUTPUT) {
if (gpiof_flags & GPIOF_MULTIDRV)
pio2_writel(base, MDER, mask);
else
pio2_writel(base, MDDR, mask);
pio2_writel(base, PUDR, mask);
pio2_writel(base, OER, mask);
} else {
if (gpiof_flags & GPIOF_PULLUP)
pio2_writel(base, PUER, mask);
else
pio2_writel(base, PUDR, mask);
if (gpiof_flags & GPIOF_DEGLITCH)
pio2_writel(base, IFER, mask);
else
pio2_writel(base, IFDR, mask);
pio2_writel(base, ODR, mask);
}
pio2_writel(base, PER, mask);
}
void gpio_set_value(unsigned int pin, int value)
{
void *base = gpio_pin_to_addr(pin);
uint32_t mask = 1 << (pin & 0x1f);
if (!base)
panic("Invalid GPIO pin %u\n", pin);
if (value)
pio2_writel(base, SODR, mask);
else
pio2_writel(base, CODR, mask);
}
int gpio_get_value(unsigned int pin)
{
void *base = gpio_pin_to_addr(pin);
int value;
if (!base)
panic("Invalid GPIO pin %u\n", pin);
value = pio2_readl(base, PDSR);
return (value >> (pin & 0x1f)) & 1;
}
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