Linux Audio
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Embedded Linux Audio
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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) { if (ssb_chipco_available(&ssb_bcm47xx.chipco) && ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES)) return -EINVAL; if (ssb_extif_available(&ssb_bcm47xx.extif) && ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES)) return -EINVAL; if (test_and_set_bit(gpio, gpio_in_use)) return -EBUSY; return 0; } EXPORT_SYMBOL(gpio_request); void gpio_free(unsigned gpio) { if (ssb_chipco_available(&ssb_bcm47xx.chipco) && ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES)) return; if (ssb_extif_available(&ssb_bcm47xx.extif) && ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES)) return; clear_bit(gpio, gpio_in_use); } EXPORT_SYMBOL(gpio_free); int gpio_to_irq(unsigned gpio) { if (ssb_chipco_available(&ssb_bcm47xx.chipco)) return ssb_mips_irq(ssb_bcm47xx.chipco.dev) + 2; else if (ssb_extif_available(&ssb_bcm47xx.extif)) return ssb_mips_irq(ssb_bcm47xx.extif.dev) + 2; else return -EINVAL; } EXPORT_SYMBOL_GPL(gpio_to_irq);