mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 01:38:22 +00:00
91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
|
/*
|
||
|
|
* arch/arm/mach-imx/generic.c
|
||
|
|
*
|
||
|
|
* author: Sascha Hauer
|
||
|
|
* Created: april 20th, 2004
|
||
|
|
* Copyright: Synertronixx GmbH
|
||
|
|
*
|
||
|
|
* Common code for i.MX machines
|
||
|
|
*
|
||
|
|
* 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>
|
||
|
|
|
||
|
|
#ifdef CONFIG_IMX
|
||
|
|
|
||
|
|
#include <asm/arch/imx-regs.h>
|
||
|
|
|
||
|
|
void imx_gpio_mode(int gpio_mode)
|
||
|
|
{
|
||
|
|
unsigned int pin = gpio_mode & GPIO_PIN_MASK;
|
||
|
|
unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> 5;
|
||
|
|
unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> 10;
|
||
|
|
unsigned int tmp;
|
||
|
|
|
||
|
|
/* Pullup enable */
|
||
|
|
if(gpio_mode & GPIO_PUEN)
|
||
|
|
PUEN(port) |= (1<<pin);
|
||
|
|
else
|
||
|
|
PUEN(port) &= ~(1<<pin);
|
||
|
|
|
||
|
|
/* Data direction */
|
||
|
|
if(gpio_mode & GPIO_OUT)
|
||
|
|
DDIR(port) |= 1<<pin;
|
||
|
|
else
|
||
|
|
DDIR(port) &= ~(1<<pin);
|
||
|
|
|
||
|
|
/* Primary / alternate function */
|
||
|
|
if(gpio_mode & GPIO_AF)
|
||
|
|
GPR(port) |= (1<<pin);
|
||
|
|
else
|
||
|
|
GPR(port) &= ~(1<<pin);
|
||
|
|
|
||
|
|
/* use as gpio? */
|
||
|
|
if( ocr == 3 )
|
||
|
|
GIUS(port) |= (1<<pin);
|
||
|
|
else
|
||
|
|
GIUS(port) &= ~(1<<pin);
|
||
|
|
|
||
|
|
/* Output / input configuration */
|
||
|
|
/* FIXME: I'm not very sure about OCR and ICONF, someone
|
||
|
|
* should have a look over it
|
||
|
|
*/
|
||
|
|
if(pin<16) {
|
||
|
|
tmp = OCR1(port);
|
||
|
|
tmp &= ~( 3<<(pin*2));
|
||
|
|
tmp |= (ocr << (pin*2));
|
||
|
|
OCR1(port) = tmp;
|
||
|
|
|
||
|
|
if( gpio_mode & GPIO_AOUT )
|
||
|
|
ICONFA1(port) &= ~( 3<<(pin*2));
|
||
|
|
if( gpio_mode & GPIO_BOUT )
|
||
|
|
ICONFB1(port) &= ~( 3<<(pin*2));
|
||
|
|
} else {
|
||
|
|
tmp = OCR2(port);
|
||
|
|
tmp &= ~( 3<<((pin-16)*2));
|
||
|
|
tmp |= (ocr << ((pin-16)*2));
|
||
|
|
OCR2(port) = tmp;
|
||
|
|
|
||
|
|
if( gpio_mode & GPIO_AOUT )
|
||
|
|
ICONFA2(port) &= ~( 3<<((pin-16)*2));
|
||
|
|
if( gpio_mode & GPIO_BOUT )
|
||
|
|
ICONFB2(port) &= ~( 3<<((pin-16)*2));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* CONFIG_IMX */
|