hidminor.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_USB_HIDMINOR_H
#define _SYS_USB_HIDMINOR_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
/*
* between internal virtual open and external physical open.
*
* When the physical devices are opened by application, they will
* be unlinked from the virtual device and their data stream will
* not be sent to the virtual device. When the opened physical
* devices are closed, they will be relinked to the virtual devices.
*
* All these automatic switch between virtual and physical are
* transparent.
*
* So we change minor node numbering scheme to be:
* external node minor num == instance << 1
* internal node minor num == instance << 1 | 0x1
*/
#define HID_MINOR_BITS_MASK 0x1
#define HID_MINOR_INSTANCE_SHIFT 1
#define HID_MINOR_INTERNAL 0x1
#define HID_MINOR_MAKE_INTERNAL(minor) \
((minor) | HID_MINOR_INTERNAL)
#define HID_IS_INTERNAL_OPEN(minor) \
(((minor) & HID_MINOR_INTERNAL))
#define HID_MINOR_TO_INSTANCE(minor) \
(((minor) & HID_MINOR_INSTANCE_MASK) >> \
#define HID_CONSTRUCT_INTERNAL_MINOR(inst) \
(((inst) << HID_MINOR_INSTANCE_SHIFT) | \
#define HID_CONSTRUCT_EXTERNAL_MINOR(inst) \
((inst) << HID_MINOR_INSTANCE_SHIFT)
#ifdef __cplusplus
}
#endif
#endif /* _SYS_USB_HIDMINOR_H */