diff options
Diffstat (limited to 'nuttx/configs/ea3152/src/up_usbmsc.c')
-rw-r--r-- | nuttx/configs/ea3152/src/up_usbmsc.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/nuttx/configs/ea3152/src/up_usbmsc.c b/nuttx/configs/ea3152/src/up_usbmsc.c new file mode 100644 index 000000000..db92e5b9e --- /dev/null +++ b/nuttx/configs/ea3152/src/up_usbmsc.c @@ -0,0 +1,126 @@ +/**************************************************************************** + * 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/fs.h> +#include <nuttx/mkfatfs.h> +#include <nuttx/ramdisk.h> + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/* Configuration ************************************************************/ + +#ifndef CONFIG_EXAMPLES_USBMSC_DEVMINOR1 +# define CONFIG_EXAMPLES_USBMSC_DEVMINOR1 0 +#endif + +#ifndef CONFIG_EXAMPLES_USBMSC_DEVPATH1 +# define CONFIG_EXAMPLES_USBMSC_DEVPATH1 "/dev/ram" +#endif + +static const char g_source[] = CONFIG_EXAMPLES_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 *) malloc (BUFFER_SIZE); + if (!pbuffer) + { + lib_lowprintf ("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_EXAMPLES_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); + 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); + /* free(pbuffer); -- RAM disk is registered */ + return ret; + } + + return 0; +} |