mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-25 22:20:45 +00:00
107 lines
3 KiB
C
107 lines
3 KiB
C
/*
|
|
* 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);
|
|
}
|