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SAMV71-XULT: Add support for a ConfigData device on the 256 AT24 EEPROM

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This commit is contained in:
Gregory Nutt 2015-03-19 14:53:05 -06:00
parent 4915c29e42
commit 6156d5f2fe
6 changed files with 191 additions and 22 deletions
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35
configs/samv71-xult/README.txt
View File

@ -344,6 +344,8 @@ NOTES:
AT24MAC402 Serial EEPROM
========================
Ethernet MAC Address
--------------------
The SAM V71 Xplained Ultra features one external AT24MAC402 serial EEPROM
with a EIA-48 MAC address connected to the SAM V71 through I2C. This device
contains a MAC address for use with the Ethernet interface.
@ -367,6 +369,29 @@ I2C address:
the A0, A1, and A3 pins on the part. On the SAMV71-XULT board, these
are all pulled high so the full, 7-bit address is 0x5f.
Configuration
-------------
System Type -> SAMV7 Peripheral Support
CONFIG_SAMV7_TWIHS0=y : Used to access the EEPROM
CONFIG_SAMV7_TWIHS0_FREQUENCY=100000
Device drivers -> Memory Technology Devices
CONFIG_MTD_AT24XX=y : Enable the AT24 device driver
CONFIG_AT24XX_SIZE=2 : Normal EEPROM is 2Kbit (256b)
CONFIG_AT24XX_ADDR=0x57 : Normal EEPROM address */
CONFIG_AT24XX_EXTENDED=y : Supports an extended memory region
CONFIG_AT24XX_EXTSIZE=160 : Extended address up to 0x9f
MTD Configuration Data
----------------------
The AT24 EEPROM can also be used to storage of up to 256 bytes of
configuration data:
Device drivers -> Memory Technology Devices
The configuration data device will appear at /dev/config.
Networking
==========
@ -398,7 +423,7 @@ Selecting the GMAC peripheral
System Type -> SAMV7 Peripheral Support
CONFIG_SAMV7_EMAC0=y : Enable the GMAC peripheral (aka, EMAC0)
CONFIG_SAMV7_TWIHS0=y : We will get the MAC address from the AT24 EEPROM
CONFIG_SAMV7_TWIHS0_FREQUENCY=100000
CONFIG_SAMV7_TWIHS0_FREQUENCY=100000
System Type -> EMAC device driver options
CONFIG_SAMV7_EMAC0_NRXBUFFERS=16 : Set aside some RS and TX buffers
@ -866,7 +891,11 @@ Configuration sub-directories
the AT2 EEPROM (I am not sure what the other address, 0x37, is are
as this writing).
7. Support for HSMCI is built-in by default. The SAMV71-XULT provides
7. TWIHS0 is also used to support 256 byte non-volatile storage for
configuration data using the MTD configuration as described above
under the heading, "MTD Configuration Data".
8. Support for HSMCI is built-in by default. The SAMV71-XULT provides
one full-size SD memory card slot. Refer to the section entitled
"SD card" for configuration-related information.
@ -875,7 +904,7 @@ Configuration sub-directories
The auto-mounter is not enabled. See the section above entitled
"Auto-Mounter".
8. Performance-related Configuration settings:
9. Performance-related Configuration settings:
CONFIG_ARMV7M_ICACHE=y : Instruction cache is enabled
CONFIG_ARMV7M_DCACHE=y : Data cache is enabled

8
configs/samv71-xult/src/Makefile
View File

@ -82,6 +82,14 @@ ifeq ($(CONFIG_USBMSC),y)
CSRCS += sam_usbmsc.c
endif
ifeq ($(CONFIG_MTD_CONFIG),y)
ifeq ($(CONFIG_SAMV7_TWIHS0),y)
ifeq ($(CONFIG_MTD_AT24XX),y)
CSRCS += sam_at24config.c
endif
endif
endif
COBJS = $(CSRCS:.c=$(OBJEXT))
SRCS = $(ASRCS) $(CSRCS)

112
configs/samv71-xult/src/sam_at24config.c Normal file
View File

@ -0,0 +1,112 @@
/************************************************************************************
* configs/samv71-xult/src/sam_at24config.c
*
* Copyright (C) 2015 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.
*
************************************************************************************/
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/configdata.h>
#include <nuttx/mtd/mtd.h>
#include <nuttx/fs/ioctl.h>
#include "sam_twihs.h"
#include "samv71-xult.h"
#ifdef HAVE_MTDCONFIG
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: sam_at24config
*
* Description:
* Create an AT24xx-based MTD configuration device for storage device configuration
* information.
*
************************************************************************************/
int sam_at24config(void)
{
struct i2c_dev_s *i2c;
struct mtd_dev_s *at24;
int ret;
/* Get an instance of the TWI0 interface */
i2c = up_i2cinitialize(0);
if (!i2c)
{
fdbg("ERROR: Failed to initialize TWI0\n");
return -ENODEV;
}
/* Initialize the AT24 driver */
at24 = at24c_initialize(i2c);
if (!at24)
{
fdbg("ERROR: Failed to initialize the AT24 driver\n");
(void)up_i2cuninitialize(i2c);
return -ENODEV;
}
/* Make sure that the AT24 is in normal memory access mode */
ret = at24->ioctl(at24, MTDIOC_EXTENDED, 0);
if (ret < 0)
{
fdbg("ERROR: AT24 ioctl(MTDIOC_EXTENDED) failed: %d\n", ret);
}
/* Bind the instance of an MTD device to the /dev/config device. */
ret = mtdconfig_register(at24);
if (ret < 0)
{
fdbg("ERROR: Failed to bind AT24 driver to the MTD config device\n");
(void)up_i2cuninitialize(i2c);
}
return ret;
}
#endif /* HAVE_MTDCONFIG */

19
configs/samv71-xult/src/sam_bringup.c
View File

@ -89,11 +89,7 @@
int sam_bringup(void)
{
#if defined(HAVE_MACADDR) || defined(HAVE_HSMCI) || defined(HAVE_USBHOST) || \
defined(HAVE_USBMONITOR) || defined(HAVE_WM8904) || \
defined(HAVE_AUTOMOUNTER) || defined(HAVE_ELF) || defined(HAVE_ROMFS)
int ret;
#endif
#ifdef HAVE_MACADDR
/* Read the Ethernet MAC address from the AT24 FLASH and configure the
@ -107,8 +103,19 @@ int sam_bringup(void)
}
#endif
#ifdef HAVE_MTDCONFIG
/* Create an AT24xx-based MTD configuration device for storage device
* configuration information.
*/
ret = sam_at24config();
if (ret < 0)
{
SYSLOG("ERROR: sam_at24config() failed: %d\n", ret);
}
#endif
#ifdef HAVE_HSMCI
#ifdef CONFIG_SAMV7_HSMCI0
/* Initialize the HSMCI0 driver */
ret = sam_hsmci_initialize(HSMCI0_SLOTNO, HSMCI0_MINOR);
@ -137,7 +144,6 @@ int sam_bringup(void)
}
#endif /* CONFIG_SAMV7XULT_HSMCI0_MOUNT */
#endif /* CONFIG_SAMV7_HSMCI0 */
#endif /* HAVE_HSMCI */
#ifdef HAVE_AUTOMOUNTER
@ -230,5 +236,6 @@ int sam_bringup(void)
* capabilities.
*/
UNUSED(ret);
return OK;
}

28
configs/samv71-xult/src/samv71-xult.h
View File

@ -60,6 +60,7 @@
#define HAVE_USBMONITOR 1
#define HAVE_NETWORK 1
#define HAVE_MACADDR 1
#define HAVE_MTDCONFIG 1
/* HSMCI */
/* Can't support MMC/SD if the card interface is not enabled */
@ -157,16 +158,24 @@
# undef HAVE_USBMONITOR
#endif
/* Networking */
/* Networking and AT24-based MTD config */
#if !defined(CONFIG_NET) || !defined(CONFIG_SAMV7_EMAC)
# undef HAVE_NETWORK
# undef HAVE_MACADDR
#endif
#if defined(CONFIG_NSH_NOMAC) || !defined(CONFIG_SAMV7_TWIHS0) || \
!defined(CONFIG_MTD_AT24XX) || !defined(CONFIG_AT24XX_EXTENDED)
#if !defined(CONFIG_SAMV7_TWIHS0) || !defined(CONFIG_MTD_AT24XX)
# undef HAVE_MACADDR
# undef HAVE_MTDCONFIG
#endif
#if defined(CONFIG_NSH_NOMAC) || !defined(CONFIG_AT24XX_EXTENDED)
# undef HAVE_MACADDR
#endif
#if !defined(CONFIG_MTD_CONFIG)
# undef HAVE_MTDCONFIG
#endif
/* SAMV71-XULT GPIO Pin Definitions *************************************************/
@ -476,5 +485,18 @@ bool sam_writeprotected(int slotno);
# define sam_writeprotected(slotno) (false)
#endif
/************************************************************************************
* Name: sam_at24config
*
* Description:
* Create an AT24xx-based MTD configuration device for storage device configuration
* information.
*
************************************************************************************/
#ifdef HAVE_MTDCONFIG
int sam_at24config(void);
#endif
#endif /* __ASSEMBLY__ */
#endif /* __CONFIGS_SAMV71_XULT_SRC_SAMV71_XULT_H */

11
include/nuttx/configdata.h
View File

@ -52,18 +52,9 @@
#include <nuttx/fs/ioctl.h>
#ifdef CONFIG_PLATFORM_CONFIGDATA
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* CONFIG_AUDIO - Enables Audio driver support
* CONFIG_DEBUG_AUDIO - If enabled (with CONFIG_DEBUG and, optionally,
* CONFIG_DEBUG_VERBOSE), this will generate output that can be used to
* debug Audio drivers.
*/
/* IOCTL Commands ***********************************************************/
/* The Audio module uses a standard character driver framework. However, a
* lot of the Audio driver functionality is configured via a device control
@ -134,6 +125,7 @@ extern "C"
*
****************************************************************************/
struct mtd_dev_s;
int mtdconfig_register(FAR struct mtd_dev_s *mtd);
#undef EXTERN
@ -141,5 +133,4 @@ int mtdconfig_register(FAR struct mtd_dev_s *mtd);
}
#endif
#endif /* CONFIG_PLATFORM_CONFIGDATA */
#endif /* __INCLUDE_NUTTX_CONFIGDATA_H */