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/*
* 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);
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