/*
   * 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/export.h>

  #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) {

  #ifdef CONFIG_BCM47XX_SSB

  	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;

  #endif

  #ifdef CONFIG_BCM47XX_BCMA
  	case BCM47XX_BUS_TYPE_BCMA:
  		if (gpio >= BCM47XX_CHIPCO_GPIO_LINES)
  			return -EINVAL;
  
  		if (test_and_set_bit(gpio, gpio_in_use))
  			return -EBUSY;
  
  		return 0;
  #endif

  	}
  	return -EINVAL;

  }

  EXPORT_SYMBOL(gpio_request);

  void gpio_free(unsigned gpio)

  {

  	switch (bcm47xx_bus_type) {

  #ifdef CONFIG_BCM47XX_SSB

  	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;

  #endif

  #ifdef CONFIG_BCM47XX_BCMA
  	case BCM47XX_BUS_TYPE_BCMA:
  		if (gpio >= BCM47XX_CHIPCO_GPIO_LINES)
  			return;
  
  		clear_bit(gpio, gpio_in_use);
  		return;
  #endif

  	}

  }
  EXPORT_SYMBOL(gpio_free);

  int gpio_to_irq(unsigned gpio)
  {

  	switch (bcm47xx_bus_type) {

  #ifdef CONFIG_BCM47XX_SSB

  	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;

  #endif

  #ifdef CONFIG_BCM47XX_BCMA
  	case BCM47XX_BUS_TYPE_BCMA:
  		return bcma_core_mips_irq(bcm47xx_bus.bcma.bus.drv_cc.core) + 2;
  #endif

  	}
  	return -EINVAL;

  }

  EXPORT_SYMBOL_GPL(gpio_to_irq);