99 lines
1.8 KiB
C
99 lines
1.8 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/spinlock.h>
|
|
#include <bcm63xx_cpu.h>
|
|
#include <bcm63xx_gpio.h>
|
|
#include <bcm63xx_io.h>
|
|
#include <bcm63xx_regs.h>
|
|
|
|
static DEFINE_SPINLOCK(bcm63xx_gpio_lock);
|
|
|
|
void bcm63xx_gpio_set_dataout(int gpio, int val)
|
|
{
|
|
u32 reg;
|
|
u32 mask;
|
|
u32 tmp;
|
|
unsigned long flags;
|
|
|
|
if (gpio >= BCM63XX_GPIO_COUNT)
|
|
BUG();
|
|
|
|
if (gpio < 32) {
|
|
reg = GPIO_DATA_LO_REG;
|
|
mask = 1 << gpio;
|
|
} else {
|
|
reg = GPIO_DATA_HI_REG;
|
|
mask = 1 << (gpio - 32);
|
|
}
|
|
|
|
spin_lock_irqsave(&bcm63xx_gpio_lock, flags);
|
|
tmp = bcm_gpio_readl(reg);
|
|
if (val)
|
|
tmp |= mask;
|
|
else
|
|
tmp &= ~mask;
|
|
bcm_gpio_writel(tmp, reg);
|
|
spin_unlock_irqrestore(&bcm63xx_gpio_lock, flags);
|
|
}
|
|
|
|
EXPORT_SYMBOL(bcm63xx_gpio_set_dataout);
|
|
|
|
int bcm63xx_gpio_get_datain(int gpio)
|
|
{
|
|
u32 reg;
|
|
u32 mask;
|
|
|
|
if (gpio >= BCM63XX_GPIO_COUNT)
|
|
BUG();
|
|
|
|
if (gpio < 32) {
|
|
reg = GPIO_DATA_LO_REG;
|
|
mask = 1 << gpio;
|
|
} else {
|
|
reg = GPIO_DATA_HI_REG;
|
|
mask = 1 << (gpio - 32);
|
|
}
|
|
|
|
return !!(bcm_gpio_readl(reg) & mask);
|
|
}
|
|
|
|
EXPORT_SYMBOL(bcm63xx_gpio_get_datain);
|
|
|
|
void bcm63xx_gpio_set_direction(int gpio, int dir)
|
|
{
|
|
u32 reg;
|
|
u32 mask;
|
|
u32 tmp;
|
|
unsigned long flags;
|
|
|
|
if (gpio >= BCM63XX_GPIO_COUNT)
|
|
BUG();
|
|
|
|
if (gpio < 32) {
|
|
reg = GPIO_CTL_LO_REG;
|
|
mask = 1 << gpio;
|
|
} else {
|
|
reg = GPIO_CTL_HI_REG;
|
|
mask = 1 << (gpio - 32);
|
|
}
|
|
|
|
spin_lock_irqsave(&bcm63xx_gpio_lock, flags);
|
|
tmp = bcm_gpio_readl(reg);
|
|
if (dir == GPIO_DIR_IN)
|
|
tmp &= ~mask;
|
|
else
|
|
tmp |= mask;
|
|
bcm_gpio_writel(tmp, reg);
|
|
spin_unlock_irqrestore(&bcm63xx_gpio_lock, flags);
|
|
}
|
|
|
|
EXPORT_SYMBOL(bcm63xx_gpio_set_direction);
|