gpio.h

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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 <[email protected]>
 */

#ifndef __BCM47XX_GPIO_H
#define __BCM47XX_GPIO_H

#include <linux/ssb/ssb_embedded.h>
#include <linux/bcma/bcma.h>
#include <asm/mach-bcm47xx/bcm47xx.h>

#define BCM47XX_EXTIF_GPIO_LINES    5
#define BCM47XX_CHIPCO_GPIO_LINES   16

extern int gpio_request(unsigned gpio, const char *label);
extern void gpio_free(unsigned gpio);
extern int gpio_to_irq(unsigned gpio);

static inline int gpio_get_value(unsigned gpio)
{
    switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
    case BCM47XX_BUS_TYPE_SSB:
        return ssb_gpio_in(&bcm47xx_bus.ssb, 1 << gpio);
#endif
#ifdef CONFIG_BCM47XX_BCMA
    case BCM47XX_BUS_TYPE_BCMA:
        return bcma_chipco_gpio_in(&bcm47xx_bus.bcma.bus.drv_cc,
                       1 << gpio);
#endif
    }
    return -EINVAL;
}

#define gpio_get_value_cansleep gpio_get_value

static inline void gpio_set_value(unsigned gpio, int value)
{
    switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
    case BCM47XX_BUS_TYPE_SSB:
        ssb_gpio_out(&bcm47xx_bus.ssb, 1 << gpio,
                 value ? 1 << gpio : 0);
        return;
#endif
#ifdef CONFIG_BCM47XX_BCMA
    case BCM47XX_BUS_TYPE_BCMA:
        bcma_chipco_gpio_out(&bcm47xx_bus.bcma.bus.drv_cc, 1 << gpio,
                     value ? 1 << gpio : 0);
        return;
#endif
    }
}

#define gpio_set_value_cansleep gpio_set_value

static inline int gpio_cansleep(unsigned gpio)
{
    return 0;
}

static inline int gpio_is_valid(unsigned gpio)
{
    return gpio < (BCM47XX_EXTIF_GPIO_LINES + BCM47XX_CHIPCO_GPIO_LINES);
}


static inline int gpio_direction_input(unsigned gpio)
{
    switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
    case BCM47XX_BUS_TYPE_SSB:
        ssb_gpio_outen(&bcm47xx_bus.ssb, 1 << gpio, 0);
        return 0;
#endif
#ifdef CONFIG_BCM47XX_BCMA
    case BCM47XX_BUS_TYPE_BCMA:
        bcma_chipco_gpio_outen(&bcm47xx_bus.bcma.bus.drv_cc, 1 << gpio,
                       0);
        return 0;
#endif
    }
    return -EINVAL;
}

static inline int gpio_direction_output(unsigned gpio, int value)
{
    switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
    case BCM47XX_BUS_TYPE_SSB:
        /* first set the gpio out value */
        ssb_gpio_out(&bcm47xx_bus.ssb, 1 << gpio,
                 value ? 1 << gpio : 0);
        /* then set the gpio mode */
        ssb_gpio_outen(&bcm47xx_bus.ssb, 1 << gpio, 1 << gpio);
        return 0;
#endif
#ifdef CONFIG_BCM47XX_BCMA
    case BCM47XX_BUS_TYPE_BCMA:
        /* first set the gpio out value */
        bcma_chipco_gpio_out(&bcm47xx_bus.bcma.bus.drv_cc, 1 << gpio,
                     value ? 1 << gpio : 0);
        /* then set the gpio mode */
        bcma_chipco_gpio_outen(&bcm47xx_bus.bcma.bus.drv_cc, 1 << gpio,
                       1 << gpio);
        return 0;
#endif
    }
    return -EINVAL;
}

static inline int gpio_intmask(unsigned gpio, int value)
{
    switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
    case BCM47XX_BUS_TYPE_SSB:
        ssb_gpio_intmask(&bcm47xx_bus.ssb, 1 << gpio,
                 value ? 1 << gpio : 0);
        return 0;
#endif
#ifdef CONFIG_BCM47XX_BCMA
    case BCM47XX_BUS_TYPE_BCMA:
        bcma_chipco_gpio_intmask(&bcm47xx_bus.bcma.bus.drv_cc,
                     1 << gpio, value ? 1 << gpio : 0);
        return 0;
#endif
    }
    return -EINVAL;
}

static inline int gpio_polarity(unsigned gpio, int value)
{
    switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
    case BCM47XX_BUS_TYPE_SSB:
        ssb_gpio_polarity(&bcm47xx_bus.ssb, 1 << gpio,
                  value ? 1 << gpio : 0);
        return 0;
#endif
#ifdef CONFIG_BCM47XX_BCMA
    case BCM47XX_BUS_TYPE_BCMA:
        bcma_chipco_gpio_polarity(&bcm47xx_bus.bcma.bus.drv_cc,
                      1 << gpio, value ? 1 << gpio : 0);
        return 0;
#endif
    }
    return -EINVAL;
}


#endif /* __BCM47XX_GPIO_H */