C++ (Cpp) wait_for_nibb Examples

Example #1

File: exynos5_i2c.c Project: 2asoft/freebsd

static int
i2c_stop(device_t dev)
{
	struct i2c_softc *sc;
	int reg;
	int error;

	sc = device_get_softc(dev);

	DPRINTF("i2c stop\n");

	mtx_lock(&sc->mutex);

	reg = READ1(sc, I2CSTAT);
	int mode = (reg >> I2CMODE_S) & I2CMODE_M;

	reg = (RXTX_EN);
	reg |= (mode << I2CMODE_S);
	WRITE1(sc, I2CSTAT, reg);

	clear_ipend(sc);

	error = wait_for_nibb(sc);
	if (error) {
		DPRINTF("cant i2c stop: nibb error\n");
		return (error);
	}

	mtx_unlock(&sc->mutex);
	return (IIC_NOERR);
}

Example #2

File: vf_i2c.c Project: Alkzndr/freebsd

static int
i2c_stop(device_t dev)
{
	struct i2c_softc *sc;

	sc = device_get_softc(dev);

	vf_i2c_dbg(sc, "i2c stop\n");

	mtx_lock(&sc->mutex);

	WRITE1(sc, I2C_IBCR, IBCR_NOACK | IBCR_IBIE);

	DELAY(100);

	/* Reset controller if bus still busy after STOP */
	if (wait_for_nibb(sc) == IIC_ETIMEOUT) {
		WRITE1(sc, I2C_IBCR, IBCR_MDIS);
		DELAY(1000);
		WRITE1(sc, I2C_IBCR, IBCR_NOACK);
	}
	mtx_unlock(&sc->mutex);

	return (IIC_NOERR);
}

Example #3

File: i2c.c Project: ChaosJohn/freebsd

static int
i2c_stop(device_t dev)
{
	struct i2c_softc *sc;

	sc = device_get_softc(dev);
	mtx_lock(&sc->mutex);
	i2c_write_reg(sc, I2C_CONTROL_REG, I2CCR_MEN | I2CCR_TXAK);
	DELAY(100);
	/* Reset controller if bus still busy after STOP */
	if (wait_for_nibb(sc) == IIC_ETIMEOUT) {
		i2c_write_reg(sc, I2C_CONTROL_REG, 0);
		DELAY(1000);
		i2c_write_reg(sc, I2C_CONTROL_REG, I2CCR_MEN | I2CCR_TXAK);

		i2c_write_reg(sc, I2C_STATUS_REG, 0x0);
	}
	mtx_unlock(&sc->mutex);

	return (IIC_NOERR);
}

Example #4

File: exynos5_i2c.c Project: 2asoft/freebsd

static int
i2c_start(device_t dev, u_char slave, int timeout)
{
	struct i2c_softc *sc;
	int error;
	int reg;

	sc = device_get_softc(dev);

	DPRINTF("i2c start\n");

	mtx_lock(&sc->mutex);

#if 0
	DPRINTF("I2CCON == 0x%08x\n", READ1(sc, I2CCON));
	DPRINTF("I2CSTAT == 0x%08x\n", READ1(sc, I2CSTAT));
#endif

	if (slave & 1) {
		slave &= ~(1);
		slave <<= 1;
		slave |= 1;
	} else {
		slave <<= 1;
	}

	error = wait_for_nibb(sc);
	if (error) {
		mtx_unlock(&sc->mutex);
		DPRINTF("cant i2c start: IIC_EBUSERR\n");
		return (IIC_EBUSERR);
	}

	reg = READ1(sc, I2CCON);
	reg |= (IRQ_EN | ACKGEN);
	WRITE1(sc, I2CCON, reg);

	WRITE1(sc, I2CDS, slave);
	DELAY(50);

	reg = (RXTX_EN);
	reg |= I2C_START_STOP;
	reg |= (I2CMODE_MT << I2CMODE_S);
	WRITE1(sc, I2CSTAT, reg);

	error = wait_for_iif(sc);
	if (error) {
		DPRINTF("cant i2c start: iif error\n");

		mtx_unlock(&sc->mutex);
		return (error);
	}

	if (!is_ack(sc)) {
		DPRINTF("cant i2c start: no ack\n");

		mtx_unlock(&sc->mutex);
		return (IIC_ENOACK);
	}

	mtx_unlock(&sc->mutex);
	return (IIC_NOERR);
}