117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
/*
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* Copyright (C) 2006 Atmel Corporation
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/gpio.h>
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#include <asm/arch/memory-map.h>
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#include "pio2.h"
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void gpio_select_periph_A(unsigned int pin, int use_pullup)
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{
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void *base = gpio_pin_to_addr(pin);
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uint32_t mask = 1 << (pin & 0x1f);
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if (!base)
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panic("Invalid GPIO pin %u\n", pin);
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pio2_writel(base, ASR, mask);
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pio2_writel(base, PDR, mask);
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if (use_pullup)
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pio2_writel(base, PUER, mask);
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else
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pio2_writel(base, PUDR, mask);
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}
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void gpio_select_periph_B(unsigned int pin, int use_pullup)
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{
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void *base = gpio_pin_to_addr(pin);
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uint32_t mask = 1 << (pin & 0x1f);
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if (!base)
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panic("Invalid GPIO pin %u\n", pin);
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pio2_writel(base, BSR, mask);
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pio2_writel(base, PDR, mask);
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if (use_pullup)
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pio2_writel(base, PUER, mask);
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else
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pio2_writel(base, PUDR, mask);
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}
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void gpio_select_pio(unsigned int pin, unsigned long gpiof_flags)
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{
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void *base = gpio_pin_to_addr(pin);
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uint32_t mask = 1 << (pin & 0x1f);
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if (!base)
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panic("Invalid GPIO pin %u\n", pin);
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if (gpiof_flags & GPIOF_OUTPUT) {
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if (gpiof_flags & GPIOF_MULTIDRV)
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pio2_writel(base, MDER, mask);
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else
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pio2_writel(base, MDDR, mask);
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pio2_writel(base, PUDR, mask);
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pio2_writel(base, OER, mask);
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} else {
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if (gpiof_flags & GPIOF_PULLUP)
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pio2_writel(base, PUER, mask);
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else
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pio2_writel(base, PUDR, mask);
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if (gpiof_flags & GPIOF_DEGLITCH)
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pio2_writel(base, IFER, mask);
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else
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pio2_writel(base, IFDR, mask);
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pio2_writel(base, ODR, mask);
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}
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pio2_writel(base, PER, mask);
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}
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void gpio_set_value(unsigned int pin, int value)
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{
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void *base = gpio_pin_to_addr(pin);
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uint32_t mask = 1 << (pin & 0x1f);
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if (!base)
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panic("Invalid GPIO pin %u\n", pin);
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if (value)
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pio2_writel(base, SODR, mask);
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else
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pio2_writel(base, CODR, mask);
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}
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int gpio_get_value(unsigned int pin)
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{
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void *base = gpio_pin_to_addr(pin);
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int value;
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if (!base)
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panic("Invalid GPIO pin %u\n", pin);
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value = pio2_readl(base, PDSR);
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return (value >> (pin & 0x1f)) & 1;
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}
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