include/platform/configdata.h

/****************************************************************************
 * apps/include/platform/configdata.h
 *
 *   Copyright (C) 2013 Gregory Nutt.  All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * 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 __APPS_INCLUDE_PLATFORM_CONFIGDATA_H
#define __APPS_INCLUDE_PLATFORM_CONFIGDATA_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <sys/types.h>

#ifdef CONFIG_PLATFORM_CONFIGDATA

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

/****************************************************************************
 * Public Types
 ****************************************************************************/
/* This enumeration identifies classes of configuration data */

enum config_data_e
{
  /* Product identification */

  CONFIGDATA_SERIALNUMBER = 0,  /* Product serial number */

  /* Prduct networking configuration */

  CONFIGDATA_MACADDRESS,        /* Assigned MAC address */
  CONFIGDATA_IPADDRESS,         /* Configured IP address */
  CONFIGDATA_NETMASK,           /* Configured network mask */
  CONFIGDATA_DIPADDR,           /* Configured default router address */

  /* GUI configuration */

  CONFIGDATA_TSCALIBRATION,     /* Measured touchscreen calibration data */
  CONFIGDATA_OTHER              /* Other configuration data */
};

/****************************************************************************
 * Public Data
 ****************************************************************************/

#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else

#define EXTERN extern
#endif

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: platform_setconfig
 *
 * Description:
 *   Save platform-specific configuration data
 *
 * Input Parameter:
 *   id         - Defines the class of configuration data
 *   instance   - Defines which instance of configuration data.  For example,
 *                if a board has two networks, then there would be two MAC
 *                addresses:  instance 0 and instance 1
 *   configdata - The new configuration data to be saved
 *   datalen    - The size of the configuration data in bytes.
 *
 * Returned Value:
 *   This is an end-user function, so it follows the normal convention:
 *   Returns the OK (zero) on success. On failure, it.returns -1 (ERROR) and
 *   sets errno appropriately.
 *
 *   Values for the errno would include:
 *
 *     EINVAL - The configdata point is invalid
 *     ENOSYS - The request ID/instance is not supported on this platform
 *
 *   Other errors may be returned from lower level drivers on failure to
 *   write to the underlying media (if applicable)
 *
 ****************************************************************************/

int platform_setconfig(enum config_data_e id, int instance,
                       FAR const uint8_t *configdata, size_t datalen);

/****************************************************************************
 * Name: platform_getconfig
 *
 * Description:
 *   Get platform-specific configuration data
 *
 * Input Parameter:
 *   id         - Defines the class of configuration data
 *   instance   - Defines which instance of configuration data.  For example,
 *                if a board has two networks, then there would be two MAC
 *                addresses:  instance 0 and instance 1
 *   configdata - The user provided location to return the configuration data
 *   datalen    - The expected size of the configuration data to be returned.
 *
 * Returned Value:
 *   This is an end-user function, so it follows the normal convention:
 *   Returns the OK (zero) on success. On failure, it.returns -1 (ERROR) and
 *   sets errno appropriately.
 *
 *   Values for the errno would include:
 *
 *     EINVAL - The configdata point is invalid
 *     ENOSYS - The request ID/instance is not supported on this platform
 *
 *   Other errors may be returned from lower level drivers on failure to
 *   read from the underlying media (if applicable)
 *
 ****************************************************************************/

int platform_getconfig(enum config_data_e id, int instance,
                       FAR uint8_t *configdata, size_t datalen);

#undef EXTERN
#if defined(__cplusplus)
}
#endif

#endif /* CONFIG_PLATFORM_CONFIGDATA */
#endif /* __APPS_INCLUDE_PLATFORM_CONFIGDATA_H */