usb-mn-ioctls.h

Six objects here: The document you re reading & its Chinese version Set of "HWDesign" includes

/* This file contains all I/O ConTroL commands definition.
 *
 * Defined as a sigle file because it should be SHARED with
 * usr spacs program.
 */

/* use 0x25 as magic-number. I haveNOT registered it, using it with carefully! */
#define MN_IOC_MAGIC 0x25

/* _IOW (or IOR/IOWR) was defined as the view of usr.
 * _IOW means write argument from USR to KERNEL.
 * But in fact kernel read our command from usr-space.
 */
#define MN_LEDon _IOR (MN_IOC_MAGIC,0,__u16)
#define MN_LEDoff _IOW (MN_IOC_MAGIC,1,__u16)