158 lines
4.9 KiB
C
158 lines
4.9 KiB
C
/****************************************************************************
|
|
* config/sama5d3x-ek/src/tm4c_at24.c
|
|
*
|
|
* Copyright (C) 2014, 2016 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/* AT24 Serial EEPROM
|
|
*
|
|
* A AT24C512 Serial EEPPROM was used for tested I2C. There are no I2C
|
|
* devices on-board the Launchpad, but an external serial EEPROM module
|
|
* module was used.
|
|
*
|
|
* The Serial EEPROM was mounted on an external adaptor board and connected
|
|
* to the LaunchPad thusly:
|
|
*
|
|
* - VCC -- VCC
|
|
* - GND -- GND
|
|
* - PB2 -- SCL
|
|
* - PB3 -- SDA
|
|
*/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <sys/mount.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/nxffs.h>
|
|
|
|
#include "tiva_i2c.h"
|
|
#include "tm4c123g-launchpad.h"
|
|
|
|
#ifdef HAVE_AT24
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: tm4c_at24_automount
|
|
*
|
|
* Description:
|
|
* Initialize and configure the AT24 serial EEPROM
|
|
*
|
|
****************************************************************************/
|
|
|
|
int tm4c_at24_automount(int minor)
|
|
{
|
|
FAR struct i2c_master_s *i2c;
|
|
FAR struct mtd_dev_s *mtd;
|
|
static bool initialized = false;
|
|
int ret;
|
|
|
|
/* Have we already initialized? */
|
|
|
|
if (!initialized)
|
|
{
|
|
/* No.. Get the I2C bus driver */
|
|
|
|
i2c = tiva_i2cbus_initialize(AT24_BUS);
|
|
if (!i2c)
|
|
{
|
|
syslog(LOG_ERR, "ERROR: Failed to initialize SPI%d\n", AT24_BUS);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Now bind the I2C interface to the AT24 I2C EEPROM driver */
|
|
|
|
mtd = at24c_initialize(i2c);
|
|
if (!mtd)
|
|
{
|
|
syslog(LOG_ERR,
|
|
"ERROR: Failed to bind SPI%d to the AT24 EEPROM driver\n",
|
|
AT24_BUS);
|
|
return -ENODEV;
|
|
}
|
|
|
|
#if defined(CONFIG_TM4C123G_LAUNCHPAD_AT24_FTL)
|
|
/* And finally, use the FTL layer to wrap the MTD driver as a block driver */
|
|
|
|
ret = ftl_initialize(AT24_MINOR, mtd);
|
|
if (ret < 0)
|
|
{
|
|
syslog(LOG_ERR, "ERROR: Failed to initialize the FTL layer: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
#elif defined(CONFIG_TM4C123G_LAUNCHPAD_AT24_NXFFS)
|
|
/* Initialize to provide NXFFS on the MTD interface */
|
|
|
|
ret = nxffs_initialize(mtd);
|
|
if (ret < 0)
|
|
{
|
|
syslog(LOG_ERR, "ERROR: NXFFS initialization failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Mount the file system at /mnt/at24 */
|
|
|
|
ret = mount(NULL, "/mnt/at24", "nxffs", 0, NULL);
|
|
if (ret < 0)
|
|
{
|
|
syslog(LOG_ERR, "ERROR: Failed to mount the NXFFS volume: %d\n", errno);
|
|
return ret;
|
|
}
|
|
#endif
|
|
/* Now we are initialized */
|
|
|
|
initialized = true;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
#endif /* HAVE_AT24 */
|