/* * 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; }