/dev/odm
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/dev/odm can be used to communicate with the disc drive. Once opened, ioctl() requests can be issued to the interface, which are documented below.
ioctl() interface
0x00 - Unknown
Calls odmMethodStartStopUnit.
0x01 - Unknown
Calls odmMethodStartStopUnit in a loop.
0x02 - ODMAwakeMotor()
0x03 - Unknown
0x04 - ODMGetDriveState()
0x05 - ODMControlMotor(buffer_io[0] = command)
command: 1 = MOTOR_START; 2 = MOTOR_STOP;
0x06 - ODMGetDiscUniqueCode(buffer_io[0] = type)
type: 1 = Disc serial ID; 2 = UNKNOWN;