1/* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net> 7 */ 8 9#include <linux/ssb/ssb.h> 10#include <linux/ssb/ssb_driver_chipcommon.h> 11#include <linux/ssb/ssb_driver_extif.h> 12#include <asm/mach-bcm47xx/bcm47xx.h> 13#include <asm/mach-bcm47xx/gpio.h> 14 15#if (BCM47XX_CHIPCO_GPIO_LINES > BCM47XX_EXTIF_GPIO_LINES) 16static DECLARE_BITMAP(gpio_in_use, BCM47XX_CHIPCO_GPIO_LINES); 17#else 18static DECLARE_BITMAP(gpio_in_use, BCM47XX_EXTIF_GPIO_LINES); 19#endif 20 21int gpio_request(unsigned gpio, const char *tag) 22{ 23 if (ssb_chipco_available(&ssb_bcm47xx.chipco) && 24 ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES)) 25 return -EINVAL; 26 27 if (ssb_extif_available(&ssb_bcm47xx.extif) && 28 ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES)) 29 return -EINVAL; 30 31 if (test_and_set_bit(gpio, gpio_in_use)) 32 return -EBUSY; 33 34 return 0; 35} 36EXPORT_SYMBOL(gpio_request); 37 38void gpio_free(unsigned gpio) 39{ 40 if (ssb_chipco_available(&ssb_bcm47xx.chipco) && 41 ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES)) 42 return; 43 44 if (ssb_extif_available(&ssb_bcm47xx.extif) && 45 ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES)) 46 return; 47 48 clear_bit(gpio, gpio_in_use); 49} 50EXPORT_SYMBOL(gpio_free); 51 52int gpio_to_irq(unsigned gpio) 53{ 54 if (ssb_chipco_available(&ssb_bcm47xx.chipco)) 55 return ssb_mips_irq(ssb_bcm47xx.chipco.dev) + 2; 56 else if (ssb_extif_available(&ssb_bcm47xx.extif)) 57 return ssb_mips_irq(ssb_bcm47xx.extif.dev) + 2; 58 else 59 return -EINVAL; 60} 61EXPORT_SYMBOL_GPL(gpio_to_irq); 62