C++ (Cpp) GPIOBUS_LOCK_BUS Examples

Example #1

File: gpioiic.c Project: Alkzndr/freebsd

static int
gpioiic_callback(device_t dev, int index, caddr_t data)
{
	struct gpioiic_softc	*sc = device_get_softc(dev);
	int			error = 0;

	switch (index) {
	case IIC_REQUEST_BUS:
		GPIOBUS_LOCK_BUS(sc->sc_busdev);
		GPIOBUS_ACQUIRE_BUS(sc->sc_busdev, sc->sc_dev);
		GPIOBUS_UNLOCK_BUS(sc->sc_busdev);
		break;
	case IIC_RELEASE_BUS:
		GPIOBUS_LOCK_BUS(sc->sc_busdev);
		GPIOBUS_RELEASE_BUS(sc->sc_busdev, sc->sc_dev);
		GPIOBUS_UNLOCK_BUS(sc->sc_busdev);
		break;
	default:
		error = EINVAL;
	}

	return (error);
}

Example #2

static int
gpioiic_getsda(device_t dev)
{
	struct gpioiic_softc		*sc = device_get_softc(dev);
	unsigned int			val;

	GPIOBUS_LOCK_BUS(sc->sc_busdev);
	GPIOBUS_PIN_SETFLAGS(sc->sc_busdev, sc->sc_dev, SDA_PIN,
	    GPIO_PIN_INPUT);
	GPIOBUS_PIN_GET(sc->sc_busdev, sc->sc_dev, SDA_PIN, &val);
	GPIOBUS_UNLOCK_BUS(sc->sc_busdev);

	return ((int)val);
}

Example #3

static int
gpioiic_reset(device_t dev, u_char speed, u_char addr, u_char *oldaddr)
{
	struct gpioiic_softc		*sc = device_get_softc(dev);

	GPIOBUS_LOCK_BUS(sc->sc_busdev);
	GPIOBUS_ACQUIRE_BUS(sc->sc_busdev, sc->sc_dev);

	gpioiic_reset_bus(sc->sc_dev);

	GPIOBUS_RELEASE_BUS(sc->sc_busdev, sc->sc_dev);
	GPIOBUS_UNLOCK_BUS(sc->sc_busdev);

	return (IIC_ENOADDR);
}

Example #4

static void
gpioiic_setscl(device_t dev, int val)
{
	struct gpioiic_softc		*sc = device_get_softc(dev);

	GPIOBUS_LOCK_BUS(sc->sc_busdev);
	if (val == 0) {
		GPIOBUS_PIN_SET(sc->sc_busdev, sc->sc_dev, SCL_PIN, 0);
		GPIOBUS_PIN_SETFLAGS(sc->sc_busdev, sc->sc_dev, SCL_PIN,
		    GPIO_PIN_OUTPUT);
	} else {
		GPIOBUS_PIN_SETFLAGS(sc->sc_busdev, sc->sc_dev, SCL_PIN,
		    GPIO_PIN_INPUT);
	}
	GPIOBUS_UNLOCK_BUS(sc->sc_busdev);
}