int culfw_send(struct culfw_dev *dev, char *cmd, int cmdlen);
int culfw_poll(struct culfw_dev *dev, int timeout);
void culfw_close(struct culfw_dev *dev);
int culfw_send(struct culfw_dev *dev, char *cmd, int cmdlen);
int culfw_poll(struct culfw_dev *dev, int timeout);
void culfw_close(struct culfw_dev *dev);