bpp_param
#define BPPIOCSPARAM _IOW('P', 0x1, struct bpp_param)
#define BPPIOCGPARAM _IOR('P', 0x2, struct bpp_param)
struct bpp_param *bp;
bp = (struct bpp_param *)data;
bp = (struct bpp_param *)data;
struct bpp_param mp_param;