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incubator-nuttx/include/nuttx/usb/usbmsc.h

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/************************************************************************************
* include/nuttx/usb/usbmsc.h
*
* Copyright (C) 2008-2010, 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* NOTE: This interface was inspired by the Linux gadget interface by
* David Brownell. That work was very helpful in determining a usable
* partitioning of functionality between standard class drivers and various
* implementations of USB controller drivers. This work, however, does
* not derive directly from that work and is licensed differently.
*
* 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.
* 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. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT OWNER OR CONTRIBUTORS 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.
*
************************************************************************************/
#ifndef _INCLUDE_NUTTX_USB_USBMSC_H
#define _INCLUDE_NUTTX_USB_USBMSC_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/************************************************************************************
* Public Types
************************************************************************************/
/************************************************************************************
* Public Data
************************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
# define EXTERN extern "C"
extern "C"
{
#else
# define EXTERN extern
#endif
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: board_mscclassobject
*
* Description:
* If the mass storage class driver is part of composite device, then
* its instantiation and configuration is a multi-step, board-specific,
* process (See comments for usbmsc_configure below). In this case,
* board-specific logic must provide board_mscclassobject().
*
* board_mscclassobject() is called from the composite driver. It must
* encapsulate the instantiation and configuration of the mass storage
* class and the return the mass storage device's class driver instance
* to the composite dirver.
*
* Input Parameters:
* classdev - The location to return the mass storage class' device
* instance.
*
* Returned Value:
* 0 on success; a negated errno on failure
*
************************************************************************************/
#if defined(CONFIG_USBDEV_COMPOSITE) && defined(CONFIG_USBMSC_COMPOSITE)
struct usbdevclass_driver_s;
EXTERN int board_mscclassobject(FAR struct usbdevclass_driver_s **classdev);
#endif
/****************************************************************************
* Name: board_mscuninitialize
*
* Description:
* Un-initialize the USB storage class driver. This is just an application-
* specific wrapper aboutn usbmsc_unitialize() that is called form the composite
* device logic.
*
* Input Parameters:
* classdev - The class driver instrance previously give to the composite
* driver by board_mscclassobject().
*
* Returned Value:
* None
*
****************************************************************************/
#if defined(CONFIG_USBDEV_COMPOSITE) && defined(CONFIG_USBMSC_COMPOSITE)
struct usbdevclass_driver_s;
EXTERN void board_mscuninitialize(FAR struct usbdevclass_driver_s *classdev);
#endif
/************************************************************************************
* Name: usbmsc_configure
*
* Description:
* One-time initialization of the USB storage driver. The initialization
* sequence is as follows:
*
* 1. Call usbmsc_configure to perform one-time initialization specifying
* the number of luns.
* 2. Call usbmsc_bindlun to configure each supported LUN
* 3. Call usbmsc_exportluns when all LUNs are configured
*
* Input Parameters:
* nluns - the number of LUNs that will be registered
* handle - Location to return a handle that is used in other API calls.
*
* Returned Value:
* 0 on success; a negated errno on failure. The returned handle value is
* an untyped equivalent to the usbmsc_classobject() or board_mscclassobject().
*
************************************************************************************/
EXTERN int usbmsc_configure(unsigned int nluns, void **handle);
/************************************************************************************
* Name: usbmsc_bindlun
*
* Description:
* Bind the block driver specified by drvrpath to a USB storage LUN.
*
* Input Parameters:
* handle - The handle returned by a previous call to usbmsc_configure().
* drvrpath - the full path to the block driver
* startsector - A sector offset into the block driver to the start of the
* partition on drvrpath (0 if no partitions)
* nsectors - The number of sectors in the partition (if 0, all sectors
* to the end of the media will be exported).
* lunno - the LUN to bind to
*
* Returned Value:
* 0 on success; a negated errno on failure.
*
************************************************************************************/
EXTERN int usbmsc_bindlun(FAR void *handle, FAR const char *drvrpath,
unsigned int lunno, off_t startsector, size_t nsectors,
bool readonly);
/************************************************************************************
* Name: usbmsc_unbindlun
*
* Description:
* Un-bind the block driver for the specified LUN
*
* Input Parameters:
* handle - The handle returned by a previous call to usbmsc_configure().
* lun - the LUN to unbind from
*
* Returned Value:
* 0 on success; a negated errno on failure.
*
************************************************************************************/
EXTERN int usbmsc_unbindlun(FAR void *handle, unsigned int lunno);
/************************************************************************************
* Name: usbmsc_exportluns
*
* Description:
* After all of the LUNs have been bound, this function may be called in order to
* export those LUNs in the USB storage device.
*
* Input Parameters:
* handle - The handle returned by a previous call to usbmsc_configure().
*
* Returned Value:
* 0 on success; a negated errno on failure
*
************************************************************************************/
#if !defined(CONFIG_USBDEV_COMPOSITE) || !defined(CONFIG_USBMSC_COMPOSITE)
EXTERN int usbmsc_exportluns(FAR void *handle);
#endif
/************************************************************************************
* Name: usbmsc_classobject
*
* Description:
* Register USB mass storage device and return the class object.
*
* Input Parameters:
* classdev - The location to return the CDC serial class' device
* instance.
*
* Returned Value:
* 0 on success; a negated errno on failure
*
************************************************************************************/
#if defined(CONFIG_USBDEV_COMPOSITE) && defined(CONFIG_USBMSC_COMPOSITE)
struct usbdevclass_driver_s;
EXTERN int usbmsc_classobject(FAR void *handle, FAR struct usbdevclass_driver_s **classdev);
#endif
/************************************************************************************
* Name: usbmsc_uninitialize
*
* Description:
* Un-initialize the USB storage class driver. The handle is the USB MSC
* class' device object. This is the same value as returned by usbmsc_classobject
* (typed) or by usbmsc_configure (untyped).
*
* Input Parameters:
* handle - The handle returned by a previous call to usbmsc_configure()
* (or usbmsc_classobject()).
*
* Returned Value:
* None
*
***********************************************************************************/
EXTERN void usbmsc_uninitialize(FAR void *handle);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* _INCLUDE_NUTTX_USB_USBMSC_H */
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