/* * 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); }