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