CCDIOCCLR
if (do_io(ccd, CCDIOCCLR, &ccio))
case CCDIOCCLR:
return (*f)(dev, CCDIOCCLR, data, flag, l);
dev/ccdvar.h:220:#define CCDIOCCLR _IOW('F', 17, struct ccd_ioctl) /* disable ccd */
case CCDIOCCLR:
case CCDIOCCLR:
case CCDIOCCLR: