mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-12 07:57:21 +00:00
99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
/*
|
|
* (C) Copyright 2009 Alessandro Rubini
|
|
*
|
|
* 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>
|
|
|
|
static unsigned long gpio_base[4] = {
|
|
NOMADIK_GPIO0_BASE,
|
|
NOMADIK_GPIO1_BASE,
|
|
NOMADIK_GPIO2_BASE,
|
|
NOMADIK_GPIO3_BASE
|
|
};
|
|
|
|
enum gpio_registers {
|
|
GPIO_DAT = 0x00, /* data register */
|
|
GPIO_DATS = 0x04, /* data set */
|
|
GPIO_DATC = 0x08, /* data clear */
|
|
GPIO_PDIS = 0x0c, /* pull disable */
|
|
GPIO_DIR = 0x10, /* direction */
|
|
GPIO_DIRS = 0x14, /* direction set */
|
|
GPIO_DIRC = 0x18, /* direction clear */
|
|
GPIO_AFSLA = 0x20, /* alternate function select A */
|
|
GPIO_AFSLB = 0x24, /* alternate function select B */
|
|
};
|
|
|
|
static inline unsigned long gpio_to_base(int gpio)
|
|
{
|
|
return gpio_base[gpio / 32];
|
|
}
|
|
|
|
static inline u32 gpio_to_bit(int gpio)
|
|
{
|
|
return 1 << (gpio & 0x1f);
|
|
}
|
|
|
|
void nmk_gpio_af(int gpio, int alternate_function)
|
|
{
|
|
unsigned long base = gpio_to_base(gpio);
|
|
u32 bit = gpio_to_bit(gpio);
|
|
u32 afunc, bfunc;
|
|
|
|
/* alternate function is 0..3, with one bit per register */
|
|
afunc = readl(base + GPIO_AFSLA) & ~bit;
|
|
bfunc = readl(base + GPIO_AFSLB) & ~bit;
|
|
if (alternate_function & 1) afunc |= bit;
|
|
if (alternate_function & 2) bfunc |= bit;
|
|
writel(afunc, base + GPIO_AFSLA);
|
|
writel(bfunc, base + GPIO_AFSLB);
|
|
}
|
|
|
|
void nmk_gpio_dir(int gpio, int dir)
|
|
{
|
|
unsigned long base = gpio_to_base(gpio);
|
|
u32 bit = gpio_to_bit(gpio);
|
|
|
|
if (dir)
|
|
writel(bit, base + GPIO_DIRS);
|
|
else
|
|
writel(bit, base + GPIO_DIRC);
|
|
}
|
|
|
|
void nmk_gpio_set(int gpio, int val)
|
|
{
|
|
unsigned long base = gpio_to_base(gpio);
|
|
u32 bit = gpio_to_bit(gpio);
|
|
|
|
if (val)
|
|
writel(bit, base + GPIO_DATS);
|
|
else
|
|
writel(bit, base + GPIO_DATC);
|
|
}
|
|
|
|
int nmk_gpio_get(int gpio)
|
|
{
|
|
unsigned long base = gpio_to_base(gpio);
|
|
u32 bit = gpio_to_bit(gpio);
|
|
|
|
return readl(base + GPIO_DAT) & bit;
|
|
}
|