GIODRV_IOC_MAGIC
#define GIODRV_IOCRESET _IO(GIODRV_IOC_MAGIC, 0)
#define GIODRV_IOCSGIODATA1 _IOW(GIODRV_IOC_MAGIC, 1, unsigned char *)
#define GIODRV_IOCGGIODATA1 _IOR(GIODRV_IOC_MAGIC, 2, unsigned char *)
#define GIODRV_IOCSGIODATA2 _IOW(GIODRV_IOC_MAGIC, 3, unsigned short *)
#define GIODRV_IOCGGIODATA2 _IOR(GIODRV_IOC_MAGIC, 4, unsigned short *)
#define GIODRV_IOCSGIODATA4 _IOW(GIODRV_IOC_MAGIC, 5, unsigned long *)
#define GIODRV_IOCGGIODATA4 _IOR(GIODRV_IOC_MAGIC, 6, unsigned long *)
#define GIODRV_IOCSGIOSETADDR _IOW(GIODRV_IOC_MAGIC, 7, unsigned long *)
#define GIODRV_IOCHARDRESET _IO(GIODRV_IOC_MAGIC, 8) /* debugging tool */