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https://xff.cz/git/u-boot/
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108 lines
3.0 KiB
C
108 lines
3.0 KiB
C
/*
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* Copyright (C) 2008 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/hardware.h>
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#include <asm/arch/gpio.h>
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void portmux_select_peripheral(void *port, unsigned long pin_mask,
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enum portmux_function func, unsigned long flags)
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{
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/* Both pull-up and pull-down set means buskeeper */
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if (flags & PORTMUX_PULL_DOWN)
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gpio_writel(port, PDERS, pin_mask);
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else
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gpio_writel(port, PDERC, pin_mask);
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if (flags & PORTMUX_PULL_UP)
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gpio_writel(port, PUERS, pin_mask);
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else
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gpio_writel(port, PUERC, pin_mask);
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/* Select drive strength */
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if (flags & PORTMUX_DRIVE_LOW)
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gpio_writel(port, ODCR0S, pin_mask);
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else
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gpio_writel(port, ODCR0C, pin_mask);
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if (flags & PORTMUX_DRIVE_HIGH)
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gpio_writel(port, ODCR1S, pin_mask);
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else
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gpio_writel(port, ODCR1C, pin_mask);
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/* Select function */
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if (func & PORTMUX_FUNC_B)
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gpio_writel(port, PMR0S, pin_mask);
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else
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gpio_writel(port, PMR0C, pin_mask);
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if (func & PORTMUX_FUNC_C)
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gpio_writel(port, PMR1S, pin_mask);
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else
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gpio_writel(port, PMR1C, pin_mask);
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/* Disable GPIO (i.e. enable peripheral) */
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gpio_writel(port, GPERC, pin_mask);
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}
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void portmux_select_gpio(void *port, unsigned long pin_mask,
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unsigned long flags)
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{
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/* Both pull-up and pull-down set means buskeeper */
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if (flags & PORTMUX_PULL_DOWN)
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gpio_writel(port, PDERS, pin_mask);
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else
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gpio_writel(port, PDERC, pin_mask);
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if (flags & PORTMUX_PULL_UP)
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gpio_writel(port, PUERS, pin_mask);
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else
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gpio_writel(port, PUERC, pin_mask);
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/* Enable open-drain mode if requested */
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if (flags & PORTMUX_OPEN_DRAIN)
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gpio_writel(port, ODMERS, pin_mask);
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else
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gpio_writel(port, ODMERC, pin_mask);
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/* Select drive strength */
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if (flags & PORTMUX_DRIVE_LOW)
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gpio_writel(port, ODCR0S, pin_mask);
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else
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gpio_writel(port, ODCR0C, pin_mask);
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if (flags & PORTMUX_DRIVE_HIGH)
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gpio_writel(port, ODCR1S, pin_mask);
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else
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gpio_writel(port, ODCR1C, pin_mask);
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/* Select direction and initial pin state */
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if (flags & PORTMUX_DIR_OUTPUT) {
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if (flags & PORTMUX_INIT_HIGH)
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gpio_writel(port, OVRS, pin_mask);
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else
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gpio_writel(port, OVRC, pin_mask);
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gpio_writel(port, ODERS, pin_mask);
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} else {
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gpio_writel(port, ODERC, pin_mask);
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}
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/* Enable GPIO */
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gpio_writel(port, GPERS, pin_mask);
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}
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