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/****************************************************************************
* configs/ea3152/src/up_usbmsc.c
*
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Configure and register the SAM3U MMC/SD SDIO block driver.
*
* 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdio.h>
#include <debug.h>
#include <errno.h>
#include <stdlib.h>
#include <nuttx/kmalloc.h>
#include <nuttx/fs/fs.h>
#include <nuttx/fs/mkfatfs.h>
#include <nuttx/fs/ramdisk.h>
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
#ifndef CONFIG_SYSTEM_USBMSC_DEVMINOR1
# define CONFIG_SYSTEM_USBMSC_DEVMINOR1 0
#endif
#ifndef CONFIG_SYSTEM_USBMSC_DEVPATH1
# define CONFIG_SYSTEM_USBMSC_DEVPATH1 "/dev/ram"
#endif
static const char g_source[] = CONFIG_SYSTEM_USBMSC_DEVPATH1;
static struct fat_format_s g_fmt = FAT_FORMAT_INITIALIZER;
#define USBMSC_NSECTORS 64
#define USBMSC_SECTORSIZE 512
#define BUFFER_SIZE (USBMSC_NSECTORS*USBMSC_SECTORSIZE)
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: usbmsc_archinitialize
*
* Description:
* Perform architecture specific initialization
*
****************************************************************************/
int usbmsc_archinitialize(void)
{
uint8_t *pbuffer;
int ret;
pbuffer = (uint8_t *)kmalloc(BUFFER_SIZE);
if (!pbuffer)
{
lowsyslog("usbmsc_archinitialize: Failed to allocate ramdisk of size %d\n",
BUFFER_SIZE);
return -ENOMEM;
}
/* Register a RAMDISK device to manage this RAM image */
ret = ramdisk_register(CONFIG_SYSTEM_USBMSC_DEVMINOR1,
pbuffer,
USBMSC_NSECTORS,
USBMSC_SECTORSIZE,
true);
if (ret < 0)
{
printf("create_ramdisk: Failed to register ramdisk at %s: %d\n",
g_source, -ret);
kmm_free(pbuffer);
return ret;
}
/* Create a FAT filesystem on the ramdisk */
ret = mkfatfs(g_source, &g_fmt);
if (ret < 0)
{
printf("create_ramdisk: Failed to create FAT filesystem on ramdisk at %s\n",
g_source);
/* kmm_free(pbuffer); -- RAM disk is registered */
return ret;
}
return 0;
}
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