FreeBSD/Linux Kernel Cross Reference
sys/dev/usb/usb_if.m

     #-
     # Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
     #
     # Redistribution and use in source and binary forms, with or without
     # modification, are permitted provided that the following conditions
     # are met:
     # 1. Redistributions of source code must retain the above copyright
     #    notice, this list of conditions and the following disclaimer,
     #    without modification, immediately at the beginning of the file.
    # 2. Redistributions in binary form must reproduce the above copyright
    #    notice, this list of conditions and the following disclaimer in the
    #    documentation and/or other materials provided with the distribution.
    # 3. The name of the author may not be used to endorse or promote products
    #    derived from this software without specific prior written permission.
    #
    # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
    # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
    # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
    # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
    # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
    # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
    # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    #
    # $FreeBSD: releng/11.2/sys/dev/usb/usb_if.m 228483 2011-12-14 00:28:54Z hselasky $
    #
    
    # USB interface description
    #
    
    #include <sys/bus.h>
    
    INTERFACE usb;
    
    # The device received a control request
    #
    # The value pointed to by "pstate" can be updated to
    # "USB_HR_COMPLETE_OK" to indicate that the control
    # read transfer is complete, in case of short USB
    # control transfers.
    #
    # Return values:
    # 0: Success
    # ENOTTY: Transaction stalled
    # Else: Use builtin request handler
    #
    METHOD int handle_request {
            device_t dev;
            const void *req; /* pointer to the device request */
            void **pptr; /* data pointer */
            uint16_t *plen; /* maximum transfer length */
            uint16_t offset; /* data offset */
            uint8_t *pstate; /* set if transfer is complete, see USB_HR_XXX */
    };
    
    # Take controller from BIOS
    #
    # Return values:
    # 0: Success
    # Else: Failure
    #
    METHOD int take_controller {
            device_t dev;
    };

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