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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) 2007 Aurelien Jarno <aurelien@aurel32.net>
*/
#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_driver_chipcommon.h>
#include <linux/ssb/ssb_driver_extif.h>
#include <asm/mach-bcm47xx/bcm47xx.h>
#include <asm/mach-bcm47xx/gpio.h>
#if (BCM47XX_CHIPCO_GPIO_LINES > BCM47XX_EXTIF_GPIO_LINES)
static DECLARE_BITMAP(gpio_in_use, BCM47XX_CHIPCO_GPIO_LINES);
#else
static DECLARE_BITMAP(gpio_in_use, BCM47XX_EXTIF_GPIO_LINES);
#endif
int gpio_request(unsigned gpio, const char *tag)
{
switch (bcm47xx_bus_type) {
case BCM47XX_BUS_TYPE_SSB:
if (ssb_chipco_available(&bcm47xx_bus.ssb.chipco) &&
((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
return -EINVAL;
if (ssb_extif_available(&bcm47xx_bus.ssb.extif) &&
((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
return -EINVAL;
if (test_and_set_bit(gpio, gpio_in_use))
return -EBUSY;
return 0;
}
return -EINVAL;
}
EXPORT_SYMBOL(gpio_request);
void gpio_free(unsigned gpio)
{
switch (bcm47xx_bus_type) {
case BCM47XX_BUS_TYPE_SSB:
if (ssb_chipco_available(&bcm47xx_bus.ssb.chipco) &&
((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
return;
if (ssb_extif_available(&bcm47xx_bus.ssb.extif) &&
((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
return;
clear_bit(gpio, gpio_in_use);
return;
}
}
EXPORT_SYMBOL(gpio_free);
int gpio_to_irq(unsigned gpio)
{
switch (bcm47xx_bus_type) {
case BCM47XX_BUS_TYPE_SSB:
if (ssb_chipco_available(&bcm47xx_bus.ssb.chipco))
return ssb_mips_irq(bcm47xx_bus.ssb.chipco.dev) + 2;
else if (ssb_extif_available(&bcm47xx_bus.ssb.extif))
return ssb_mips_irq(bcm47xx_bus.ssb.extif.dev) + 2;
else
return -EINVAL;
}
return -EINVAL;
}
EXPORT_SYMBOL_GPL(gpio_to_irq);
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