147 lines
6.1 KiB
C
147 lines
6.1 KiB
C
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/****************************************************************************
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* drivers/usbhost/usbhost_composite.c
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/usb/usbhost.h>
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#include "usbhost_composite.h"
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#ifdef CONFIG_USBHOST_COMPOSITE
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: usbhost_composite
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*
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* Description:
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* As the final steps in the device enumeration sequence this function
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* will be called in order to determine (1) determine if the device is
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* a composite device, and if so, (2) create the composite class which
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* contains all of the individual class instances making up the composite.
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*
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* Input Parameters:
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* hport - The downstream port to which the (potential) composite
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* device has been connected.
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* configdesc - The full configuration descriptor
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* desclen - The length of the configuration descriptor
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* devclass - If the class driver for the device is successful located
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* and bound to the hub port, the allocated class instance
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* is returned into this caller-provided memory location.
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*
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* Returned Value:
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* Zero (OK) is returned if (1) the device was determined to be a
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* composite device and (2) the composite class wrapper was sucessfully
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* created and bound to the HCD. A negated errno value is returned on
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* any failure. The value -ENOENT, in particular means that the attached
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* device is not a composite device. Other values would indicate other
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* various, unexpected failures.
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*
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****************************************************************************/
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int usbhost_composite(FAR struct usbhost_hubport_s *hport,
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FAR const uint8_t *configdesc, int desclen,
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FAR struct usbhost_id_s *id,
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FAR struct usbhost_class_s **devclass)
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{
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/* Determine if this a composite device has been connected to the
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* downstream port.
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*/
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/* Count the number of interfaces. Scan for IAD descriptors that will be
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* used when it is necessary to associate multiple interfaces with a single
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* device.
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*/
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/* Allocate the composite class container */
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/* Loop, processing each device that we discovered */
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/* See usbhost_classbind() for similar logic */
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/* Is there is a class implementation registered to support this device. */
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/* Yes.. there is a class for this device. Get an instance of
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* its interface.
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*/
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/* Then bind the newly instantiated class instance to the
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* composite wrapper (not the HCD) */
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/* On failures, call the class disconnect method which
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* should then free the allocated devclass instance.
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*/
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/* All classes have been found, instantiated and boud the the composite class
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* container. Now bind the composite class instance to the HCD */
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/* On failures, call the class disconnect method which should then free
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* the allocated devclass instance.
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*/
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return -ENOSYS;
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}
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#endif /* CONFIG_USBHOST_COMPOSITE */
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