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Add an MTD device wrapper that can used to provide a /dev/config that can be used for retaining configuration data. From Ken Pettit
This commit is contained in:
Gregory Nutt
@@ -5924,4 +5924,7 @@
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caused an exception in usbdev_reset() later. The driver reference
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will be nullified later usbdev_unregister when the caller gets the
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error. From David Sidrane (2013-10-31).
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* drivers/mtd_config.c and include/nuttx/configdata.h: Add a container
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for an MTD device that can be used to provide a simple, lightweight
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interface to configation data storage that resides on some storage
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media that is wrapped as an MTD device. From Ken Pettit (2013-11-1).
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@@ -35,6 +35,13 @@ config MTD_BYTE_WRITE
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support such writes. The SMART file system can take advantage of
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this option if it is enabled.
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config MTD_CONFIG
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bool "Enable Dev Config (MTD based) device"
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default n
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---help---
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Provides a /dev/config device for saving / restoring application
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configuration data to a standard MTD device or partition.
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comment "MTD Device Drivers"
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config RAMMTD
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@@ -39,7 +39,7 @@
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ifeq ($(CONFIG_MTD),y)
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CSRCS += at45db.c flash_eraseall.c ftl.c m25px.c ramtron.c
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CSRCS += at45db.c flash_eraseall.c ftl.c m25px.c ramtron.c mtd_config.c
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ifeq ($(CONFIG_MTD_PARTITION),y)
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CSRCS += mtd_partition.c
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File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,143 @@
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/****************************************************************************
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* include/nuttx/configdata.h
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*
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* Copyright (C) 2013 Ken Pettit. All rights reserved.
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* Author: Ken Pettit <pettitkd@gmail.com>
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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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#ifndef __INCLUDE_NUTTX_CONFIGDATA_H
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#define __INCLUDE_NUTTX_CONFIGDATA_H
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/* The configdata device details kernel level services for providing
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* application config data from kernel control objects, such as partitions
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* on shared MTD devices, etc.
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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/compiler.h>
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#include <nuttx/fs/ioctl.h>
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#ifdef CONFIG_PLATFORM_CONFIGDATA
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* CONFIG_AUDIO - Enables Audio driver support
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* CONFIG_DEBUG_AUDIO - If enabled (with CONFIG_DEBUG and, optionally,
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* CONFIG_DEBUG_VERBOSE), this will generate output that can be used to
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* debug Audio drivers.
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*/
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/* IOCTL Commands ***********************************************************/
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/* The Audio module uses a standard character driver framework. However, a
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* lot of the Audio driver functionality is configured via a device control
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* interface, such as sampling rate, volume, data format, etc.
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* The Audio ioctl commands are lised below:
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*
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* CFGDIOC_GETCONFIG - Get a specified Config Data item.
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*
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* ioctl argument: Pointer to a config_data_s structure to receive the
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* config data. All fields of the strucure must be
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* specified (i.e. id, instance, pointer and len).
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*
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* CFGDIOC_SETCONFIG - Set a specified Config Data Item
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*
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* ioctl argument: Pointer to a config_data_s structure to receive the
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* config data. All fields of the strucure must be
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* specified (i.e. id, instance, pointer and len).
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*/
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#define CFGDIOC_GETCONFIG _CFGDIOC(1)
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#define CFGDIOC_SETCONFIG _CFGDIOC(2)
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* This structure is used to get and set config data items */
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struct config_data_s
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{
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uint16_t id; /* ID of the config data item */
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int instance; /* Instance of the item */
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FAR uint8_t *configdata; /* Pointer to the config data */
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size_t len; /* Length of the config data buffer */
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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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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Name: mtdconfig_register
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*
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* Description:
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* This function binds an instance of an MTD device to the /dev/config
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* device.
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*
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* When this function is called, the MTD device pass in should already
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* be initialized appropriately to access the physical device or partition.
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*
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* Input parameters:
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* mtd - Pointer to the MTD device to bind with the /dev/config device
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*
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* Returned Value:
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* Zero on success; a negated errno value on failure.
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*
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****************************************************************************/
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int mtdconfig_register(FAR struct mtd_dev_s *mtd);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* CONFIG_PLATFORM_CONFIGDATA */
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#endif /* __INCLUDE_NUTTX_CONFIGDATA_H */
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@@ -1,7 +1,7 @@
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/****************************************************************************
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* include/nuttx/fs/ioctl.h
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*
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* Copyright (C) 2008, 2009, 2011-2012 Gregory Nutt. All rights reserved.
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* Copyright (C) 2008, 2009, 2011-2013 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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@@ -68,7 +68,8 @@
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#define _QEIOCBASE (0x0f00) /* Quadrature encoder ioctl commands */
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#define _AUDIOIOCBASE (0x1000) /* Audio ioctl commands */
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#define _SLCDIOCBASE (0x1100) /* Segment LCD ioctl commands */
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#define _WLIOCBASE (0x1100) /* Wireless modules ioctl commands */
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#define _WLIOCBASE (0x1200) /* Wireless modules ioctl commands */
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#define _CFGDIOCBASE (0x1300) /* Config Data device (app config) ioctl commands */
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/* Macros used to manage ioctl commands */
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@@ -251,24 +252,30 @@
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#define _QEIOCVALID(c) (_IOC_TYPE(c)==_QEIOCBASE)
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#define _QEIOC(nr) _IOC(_QEIOCBASE,nr)
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/* NuttX Audio driver ioctl definitions ************************************/
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/* NuttX Audio driver ioctl definitions *************************************/
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/* (see nuttx/audio/audio.h) */
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#define _AUDIOIOCVALID(c) (_IOC_TYPE(c)==_AUDIOIOCBASE)
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#define _AUDIOIOC(nr) _IOC(_AUDIOIOCBASE,nr)
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/* Segment LCD driver ioctl definitions ************************************/
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/* Segment LCD driver ioctl definitions *************************************/
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/* (see nuttx/include/lcd/slcd_codec.h */
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#define _SLCDIOCVALID(c) (_IOC_TYPE(c)==_SLCDIOCBASE)
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#define _SLCDIOC(nr) _IOC(_SLCDIOCBASE,nr)
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/* Wireless driver ioctl definitions ************************************/
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/* Wireless driver ioctl definitions ****************************************/
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/* (see nuttx/include/wireless/wireless.h */
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#define _WLIOCVALID(c) (_IOC_TYPE(c)==_WLIOCBASE)
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#define _WLIOC(nr) _IOC(_WLIOCBASE,nr)
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/* Application Config Data driver ioctl definitions *************************/
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/* (see nuttx/include/configdata.h */
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#define _CFGDIOCVALID(c) (_IOC_TYPE(c)==_CFGDIOCBASE)
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#define _CFGDIOC(nr) _IOC(_CFGDIOCBASE,nr)
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/****************************************************************************
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* Public Type Definitions
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****************************************************************************/
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