js_corr
struct js_corr corr[ABS_CNT];
static int joydev_correct(int value, struct js_corr *corr)
#define JSIOCSCORR _IOW('j', 0x21, struct js_corr) /* set correction values */
#define JSIOCGCORR _IOR('j', 0x22, struct js_corr) /* get correction values */