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/export.h>
 10#include <linux/ssb/ssb.h>
 11#include <linux/ssb/ssb_driver_chipcommon.h>
 12#include <linux/ssb/ssb_driver_extif.h>
 13#include <asm/mach-bcm47xx/bcm47xx.h>
 14#include <asm/mach-bcm47xx/gpio.h>
 15
 16#if (BCM47XX_CHIPCO_GPIO_LINES > BCM47XX_EXTIF_GPIO_LINES)
 17static DECLARE_BITMAP(gpio_in_use, BCM47XX_CHIPCO_GPIO_LINES);
 18#else
 19static DECLARE_BITMAP(gpio_in_use, BCM47XX_EXTIF_GPIO_LINES);
 20#endif
 21
 22int gpio_request(unsigned gpio, const char *tag)
 23{
 24	switch (bcm47xx_bus_type) {
 25#ifdef CONFIG_BCM47XX_SSB
 26	case BCM47XX_BUS_TYPE_SSB:
 27		if (ssb_chipco_available(&bcm47xx_bus.ssb.chipco) &&
 28		    ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
 29			return -EINVAL;
 30
 31		if (ssb_extif_available(&bcm47xx_bus.ssb.extif) &&
 32		    ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
 33			return -EINVAL;
 34
 35		if (test_and_set_bit(gpio, gpio_in_use))
 36			return -EBUSY;
 37
 38		return 0;
 39#endif
 40#ifdef CONFIG_BCM47XX_BCMA
 41	case BCM47XX_BUS_TYPE_BCMA:
 42		if (gpio >= BCM47XX_CHIPCO_GPIO_LINES)
 43			return -EINVAL;
 44
 45		if (test_and_set_bit(gpio, gpio_in_use))
 46			return -EBUSY;
 47
 48		return 0;
 49#endif
 50	}
 51	return -EINVAL;
 52}
 53EXPORT_SYMBOL(gpio_request);
 54
 55void gpio_free(unsigned gpio)
 56{
 57	switch (bcm47xx_bus_type) {
 58#ifdef CONFIG_BCM47XX_SSB
 59	case BCM47XX_BUS_TYPE_SSB:
 60		if (ssb_chipco_available(&bcm47xx_bus.ssb.chipco) &&
 61		    ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
 62			return;
 63
 64		if (ssb_extif_available(&bcm47xx_bus.ssb.extif) &&
 65		    ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
 66			return;
 67
 68		clear_bit(gpio, gpio_in_use);
 69		return;
 70#endif
 71#ifdef CONFIG_BCM47XX_BCMA
 72	case BCM47XX_BUS_TYPE_BCMA:
 73		if (gpio >= BCM47XX_CHIPCO_GPIO_LINES)
 74			return;
 75
 76		clear_bit(gpio, gpio_in_use);
 77		return;
 78#endif
 79	}
 80}
 81EXPORT_SYMBOL(gpio_free);
 82
 83int gpio_to_irq(unsigned gpio)
 84{
 85	switch (bcm47xx_bus_type) {
 86#ifdef CONFIG_BCM47XX_SSB
 87	case BCM47XX_BUS_TYPE_SSB:
 88		if (ssb_chipco_available(&bcm47xx_bus.ssb.chipco))
 89			return ssb_mips_irq(bcm47xx_bus.ssb.chipco.dev) + 2;
 90		else if (ssb_extif_available(&bcm47xx_bus.ssb.extif))
 91			return ssb_mips_irq(bcm47xx_bus.ssb.extif.dev) + 2;
 92		else
 93			return -EINVAL;
 94#endif
 95#ifdef CONFIG_BCM47XX_BCMA
 96	case BCM47XX_BUS_TYPE_BCMA:
 97		return bcma_core_mips_irq(bcm47xx_bus.bcma.bus.drv_cc.core) + 2;
 98#endif
 99	}
100	return -EINVAL;
101}
102EXPORT_SYMBOL_GPL(gpio_to_irq);