126 lines
3.7 KiB
C
126 lines
3.7 KiB
C
/****************************************************************************
|
|
* boards/arm/samd5e5/metro-m4/src/sam_at24.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <stdbool.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/i2c/i2c_master.h>
|
|
#include <nuttx/mtd/mtd.h>
|
|
#include <nuttx/fs/fs.h>
|
|
#include <nuttx/fs/nxffs.h>
|
|
|
|
#include "metro-m4.h"
|
|
|
|
#ifdef HAVE_AT24
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: sam_at24_automount
|
|
*
|
|
* Description:
|
|
* Initialize and configure the AT24 serial EEPROM
|
|
*
|
|
****************************************************************************/
|
|
|
|
extern struct i2c_master_s *g_i2c5_dev;
|
|
|
|
int sam_at24_automount(int minor)
|
|
{
|
|
struct mtd_dev_s *mtd;
|
|
static bool initialized = false;
|
|
int ret;
|
|
|
|
/* Have we already initialized? */
|
|
|
|
if (!initialized)
|
|
{
|
|
/* Now bind the I2C interface to the AT24 I2C EEPROM driver */
|
|
|
|
finfo("Bind the AT24 EEPROM driver to I2C%d\n", AT24_I2C_BUS);
|
|
mtd = at24c_initialize(g_i2c5_dev);
|
|
if (!mtd)
|
|
{
|
|
ferr("ERROR: Failed to bind TWI%d to the AT24 EEPROM driver\n",
|
|
AT24_I2C_BUS);
|
|
return -ENODEV;
|
|
}
|
|
|
|
#if defined(CONFIG_METRO_M4_AT24_FTL)
|
|
/* And finally, use the FTL layer
|
|
* to wrap the MTD driver as a block driver
|
|
*/
|
|
|
|
finfo("Initialize the FTL layer to create /dev/mtdblock%d\n",
|
|
AT24_MINOR);
|
|
ret = ftl_initialize(AT24_MINOR, mtd);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Failed to initialize the FTL layer: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
#elif defined(CONFIG_METRO_M4_AT24_NXFFS)
|
|
/* Initialize to provide NXFFS on the MTD interface */
|
|
|
|
finfo("Initialize the NXFFS file system\n");
|
|
ret = nxffs_initialize(mtd);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: NXFFS initialization failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Mount the file system at /mnt/at24 */
|
|
|
|
finfo("Mount the NXFFS file system at /dev/at24\n");
|
|
ret = nx_mount(NULL, "/mnt/at24", "nxffs", 0, NULL);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Failed to mount the NXFFS volume: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
/* Now we are initialized */
|
|
|
|
initialized = true;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
#endif /* HAVE_AT24 */
|