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/*
* Copyright (C) 2008 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/memory-map.h>
#include <asm/arch/gpio.h>
void portmux_select_peripheral(void *port, unsigned long pin_mask,
enum portmux_function func, unsigned long flags)
{
/* Both pull-up and pull-down set means buskeeper */
if (flags & PORTMUX_PULL_DOWN)
gpio_writel(port, PDERS, pin_mask);
else
gpio_writel(port, PDERC, pin_mask);
if (flags & PORTMUX_PULL_UP)
gpio_writel(port, PUERS, pin_mask);
else
gpio_writel(port, PUERC, pin_mask);
/* Select drive strength */
if (flags & PORTMUX_DRIVE_LOW)
gpio_writel(port, ODCR0S, pin_mask);
else
gpio_writel(port, ODCR0C, pin_mask);
if (flags & PORTMUX_DRIVE_HIGH)
gpio_writel(port, ODCR1S, pin_mask);
else
gpio_writel(port, ODCR1C, pin_mask);
/* Select function */
if (func & PORTMUX_FUNC_B)
gpio_writel(port, PMR0S, pin_mask);
else
gpio_writel(port, PMR0C, pin_mask);
if (func & PORTMUX_FUNC_C)
gpio_writel(port, PMR1S, pin_mask);
else
gpio_writel(port, PMR1C, pin_mask);
/* Disable GPIO (i.e. enable peripheral) */
gpio_writel(port, GPERC, pin_mask);
}
void portmux_select_gpio(void *port, unsigned long pin_mask,
unsigned long flags)
{
/* Both pull-up and pull-down set means buskeeper */
if (flags & PORTMUX_PULL_DOWN)
gpio_writel(port, PDERS, pin_mask);
else
gpio_writel(port, PDERC, pin_mask);
if (flags & PORTMUX_PULL_UP)
gpio_writel(port, PUERS, pin_mask);
else
gpio_writel(port, PUERC, pin_mask);
/* Enable open-drain mode if requested */
if (flags & PORTMUX_OPEN_DRAIN)
gpio_writel(port, ODMERS, pin_mask);
else
gpio_writel(port, ODMERC, pin_mask);
/* Select drive strength */
if (flags & PORTMUX_DRIVE_LOW)
gpio_writel(port, ODCR0S, pin_mask);
else
gpio_writel(port, ODCR0C, pin_mask);
if (flags & PORTMUX_DRIVE_HIGH)
gpio_writel(port, ODCR1S, pin_mask);
else
gpio_writel(port, ODCR1C, pin_mask);
/* Select direction and initial pin state */
if (flags & PORTMUX_DIR_OUTPUT) {
if (flags & PORTMUX_INIT_HIGH)
gpio_writel(port, OVRS, pin_mask);
else
gpio_writel(port, OVRC, pin_mask);
gpio_writel(port, ODERS, pin_mask);
} else {
gpio_writel(port, ODERC, pin_mask);
}
/* Enable GPIO */
gpio_writel(port, GPERS, pin_mask);
}
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