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https://github.com/AsahiLinux/u-boot
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91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
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/*
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* arch/arm/mach-imx/generic.c
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*
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* author: Sascha Hauer
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* Created: april 20th, 2004
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* Copyright: Synertronixx GmbH
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*
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* Common code for i.MX machines
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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, MA 02111-1307 USA
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*
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*/
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#include <common.h>
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#ifdef CONFIG_IMX
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#include <asm/arch/imx-regs.h>
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void imx_gpio_mode(int gpio_mode)
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{
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unsigned int pin = gpio_mode & GPIO_PIN_MASK;
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unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> 5;
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unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> 10;
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unsigned int tmp;
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/* Pullup enable */
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if(gpio_mode & GPIO_PUEN)
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PUEN(port) |= (1<<pin);
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else
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PUEN(port) &= ~(1<<pin);
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/* Data direction */
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if(gpio_mode & GPIO_OUT)
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DDIR(port) |= 1<<pin;
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else
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DDIR(port) &= ~(1<<pin);
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/* Primary / alternate function */
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if(gpio_mode & GPIO_AF)
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GPR(port) |= (1<<pin);
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else
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GPR(port) &= ~(1<<pin);
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/* use as gpio? */
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if( ocr == 3 )
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GIUS(port) |= (1<<pin);
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else
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GIUS(port) &= ~(1<<pin);
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/* Output / input configuration */
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/* FIXME: I'm not very sure about OCR and ICONF, someone
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* should have a look over it
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*/
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if(pin<16) {
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tmp = OCR1(port);
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tmp &= ~( 3<<(pin*2));
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tmp |= (ocr << (pin*2));
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OCR1(port) = tmp;
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if( gpio_mode & GPIO_AOUT )
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ICONFA1(port) &= ~( 3<<(pin*2));
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if( gpio_mode & GPIO_BOUT )
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ICONFB1(port) &= ~( 3<<(pin*2));
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} else {
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tmp = OCR2(port);
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tmp &= ~( 3<<((pin-16)*2));
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tmp |= (ocr << ((pin-16)*2));
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OCR2(port) = tmp;
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if( gpio_mode & GPIO_AOUT )
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ICONFA2(port) &= ~( 3<<((pin-16)*2));
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if( gpio_mode & GPIO_BOUT )
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ICONFB2(port) &= ~( 3<<((pin-16)*2));
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}
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}
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#endif /* CONFIG_IMX */
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