mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-28 23:51:33 +00:00
4688f9e34a
Adds GPIO manipulation functions for AVR32 AP7 platform. Signed-off-by: Peter Ma <pma@mediamatech.com> [haavard.skinnemoen@atmel.com: coding style fixup, slight simplification] Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
116 lines
2.8 KiB
C
116 lines
2.8 KiB
C
/*
|
|
* 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;
|
|
}
|