static int
i2c_repeated_start(device_t dev, u_char slave, int timeout)
{
struct i2c_softc *sc;
int error;
sc = device_get_softc(dev);
if ((i2c_read_reg(sc, I2C_STATUS_REG) & I2CSR_MBB) == 0) {
return (IIC_EBUSERR);
}
/*
* Set repeated start condition, delay (per reference manual, min 156nS)
* before writing slave address, wait for ack after write.
*/
i2c_flag_set(sc, I2C_CONTROL_REG, I2CCR_RSTA);
DELAY(1);
i2c_write_reg(sc, I2C_STATUS_REG, 0x0);
i2c_write_reg(sc, I2C_DATA_REG, slave);
error = wait_for_xfer(sc, true);
return (i2c_error_handler(sc, error));
}
static int
i2c_repeated_start(device_t dev, u_char slave, int timeout)
{
struct i2c_softc *sc;
int error;
sc = device_get_softc(dev);
mtx_lock(&sc->mutex);
/* Set repeated start condition */
i2c_flag_set(sc, I2C_CONTROL_REG ,I2CCR_RSTA);
/* Write target address - LSB is R/W bit */
i2c_write_reg(sc, I2C_DATA_REG, slave);
DELAY(1250);
error = i2c_do_wait(dev, sc, 1, 1);
mtx_unlock(&sc->mutex);
if (error)
return (error);
return (IIC_NOERR);
}
static int
i2c_repeated_start(device_t dev, u_char slave, int timeout)
{
struct i2c_softc *sc;
int error;
sc = device_get_softc(dev);
mtx_lock(&sc->mutex);
i2c_write_reg(sc, I2C_ADDR_REG, slave);
if ((i2c_read_reg(sc, I2C_STATUS_REG) & I2CSR_MBB) == 0) {
mtx_unlock(&sc->mutex);
return (IIC_EBUSBSY);
}
/* Set repeated start condition */
DELAY(10);
i2c_flag_set(sc, I2C_CONTROL_REG, I2CCR_RSTA);
DELAY(10);
/* Clear status */
i2c_write_reg(sc, I2C_STATUS_REG, 0x0);
/* Write target address - LSB is R/W bit */
i2c_write_reg(sc, I2C_DATA_REG, slave);
error = wait_for_iif(sc);
/* Clear status */
i2c_write_reg(sc, I2C_STATUS_REG, 0x0);
mtx_unlock(&sc->mutex);
if (error)
return (error);
return (IIC_NOERR);
}
