63 строки
1.6 KiB
C
63 строки
1.6 KiB
C
/*
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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) 2007 Aurelien Jarno <aurelien@aurel32.net>
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*/
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#include <linux/ssb/ssb.h>
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#include <linux/ssb/ssb_driver_chipcommon.h>
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#include <linux/ssb/ssb_driver_extif.h>
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#include <asm/mach-bcm47xx/bcm47xx.h>
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#include <asm/mach-bcm47xx/gpio.h>
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#if (BCM47XX_CHIPCO_GPIO_LINES > BCM47XX_EXTIF_GPIO_LINES)
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static DECLARE_BITMAP(gpio_in_use, BCM47XX_CHIPCO_GPIO_LINES);
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#else
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static DECLARE_BITMAP(gpio_in_use, BCM47XX_EXTIF_GPIO_LINES);
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#endif
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int gpio_request(unsigned gpio, const char *tag)
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{
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if (ssb_chipco_available(&ssb_bcm47xx.chipco) &&
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((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
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return -EINVAL;
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if (ssb_extif_available(&ssb_bcm47xx.extif) &&
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((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
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return -EINVAL;
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if (test_and_set_bit(gpio, gpio_in_use))
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return -EBUSY;
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return 0;
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}
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EXPORT_SYMBOL(gpio_request);
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void gpio_free(unsigned gpio)
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{
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if (ssb_chipco_available(&ssb_bcm47xx.chipco) &&
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((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
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return;
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if (ssb_extif_available(&ssb_bcm47xx.extif) &&
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((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
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return;
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clear_bit(gpio, gpio_in_use);
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}
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EXPORT_SYMBOL(gpio_free);
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int gpio_to_irq(unsigned gpio)
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{
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if (ssb_chipco_available(&ssb_bcm47xx.chipco))
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return ssb_mips_irq(ssb_bcm47xx.chipco.dev) + 2;
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else if (ssb_extif_available(&ssb_bcm47xx.extif))
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return ssb_mips_irq(ssb_bcm47xx.extif.dev) + 2;
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else
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return -EINVAL;
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}
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EXPORT_SYMBOL_GPL(gpio_to_irq);
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