/****************************************************************************
*
* Copyright (c) 2013-2014 PX4 Development Team. All rights reserved.
*
* 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 PX4 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
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****************************************************************************/
/**
* @file mtd.c
*
* mtd service and utility app.
*
* @author Lorenz Meier <lm@inf.ethz.ch>
*/
#include <nuttx/config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mount.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <nuttx/spi.h>
#include <nuttx/mtd.h>
#include <nuttx/fs/nxffs.h>
#include <nuttx/fs/ioctl.h>
#include <arch/board/board.h>
#include "systemlib/systemlib.h"
#include "systemlib/param/param.h"
#include "systemlib/err.h"
__EXPORT int mtd_main(int argc, char *argv[]);
#ifndef CONFIG_MTD
/* create a fake command with decent warnx to not confuse users */
int mtd_main(int argc, char *argv[])
{
errx(1, "MTD not enabled, skipping.");
}
#else
#ifdef CONFIG_MTD_RAMTRON
static void ramtron_attach(void);
#endif
static void at24xxx_attach(void);
static void mtd_start(char *partition_names[], unsigned n_partitions);
static void mtd_test(void);
static void mtd_erase(char *partition_names[], unsigned n_partitions);
static bool attached = false;
static bool started = false;
static struct mtd_dev_s *mtd_dev;
/* note, these will be equally sized */
static char *partition_names_default[] = {"/fs/mtd_params", "/fs/mtd_waypoints"};
static const int n_partitions_default = sizeof(partition_names_default) / sizeof(partition_names_default[0]);
int mtd_main(int argc, char *argv[])
{
if (argc >= 2) {
if (!strcmp(argv[1], "start")) {
/* start mapping according to user request */
if (argc > 3) {
mtd_start(argv + 2, argc - 2);
} else {
mtd_start(partition_names_default, n_partitions_default);
}
}
if (!strcmp(argv[1], "test"))
mtd_test();
if (!strcmp(argv[1], "erase")) {
if (argc < 3) {
errx(1, "usage: mtd erase <PARTITION_PATH..>");
}
mtd_erase(argv + 2, argc - 2);
}
}
errx(1, "expected a command, try 'start', 'erase' or 'test'");
}
struct mtd_dev_s *ramtron_initialize(FAR struct spi_dev_s *dev);
struct mtd_dev_s *mtd_partition(FAR struct mtd_dev_s *mtd,
off_t firstblock, off_t nblocks);
#ifdef CONFIG_MTD_RAMTRON
static void
ramtron_attach(void)
{
/* find the right spi */
struct spi_dev_s *spi = up_spiinitialize(2);
/* this resets the spi bus, set correct bus speed again */
SPI_SETFREQUENCY(spi, 40 * 1000 * 1000);
SPI_SETBITS(spi, 8);
SPI_SETMODE(spi, SPIDEV_MODE3);
SPI_SELECT(spi, SPIDEV_FLASH, false);
if (spi == NULL)
errx(1, "failed to locate spi bus");
/* start the RAMTRON driver, attempt 5 times */
for (int i = 0; i < 5; i++) {
mtd_dev = ramtron_initialize(spi);
if (mtd_dev) {
/* abort on first valid result */
if (i > 0) {
warnx("warning: mtd needed %d attempts to attach", i + 1);
}
break;
}
}
/* if last attempt is still unsuccessful, abort */
if (mtd_dev == NULL)
errx(1, "failed to initialize mtd driver");
attached = true;
}
#endif
static void
at24xxx_attach(void)
{
/* find the right I2C */
struct i2c_dev_s *i2c = up_i2cinitialize(PX4_I2C_BUS_ONBOARD);
/* this resets the I2C bus, set correct bus speed again */
I2C_SETFREQUENCY(i2c, 400000);
if (i2c == NULL)
errx(1, "failed to locate I2C bus");
/* start the MTD driver, attempt 5 times */
for (int i = 0; i < 5; i++) {
mtd_dev = at24c_initialize(i2c);
if (mtd_dev) {
/* abort on first valid result */
if (i > 0) {
warnx("warning: EEPROM needed %d attempts to attach", i+1);
}
break;
}
}
/* if last attempt is still unsuccessful, abort */
if (mtd_dev == NULL)
errx(1, "failed to initialize EEPROM driver");
attached = true;
}
static void
mtd_start(char *partition_names[], unsigned n_partitions)
{
int ret;
if (started)
errx(1, "mtd already mounted");
if (!attached) {
#ifdef CONFIG_ARCH_BOARD_PX4FMU_V1
at24xxx_attach();
#else
ramtron_attach();
#endif
}
if (!mtd_dev) {
warnx("ERROR: Failed to create RAMTRON FRAM MTD instance");
exit(1);
}
/* Get the geometry of the FLASH device */
FAR struct mtd_geometry_s geo;
ret = mtd_dev->ioctl(mtd_dev, MTDIOC_GEOMETRY, (unsigned long)((uintptr_t)&geo));
if (ret < 0) {
warnx("ERROR: mtd->ioctl failed: %d", ret);
exit(3);
}
warnx("Flash Geometry:");
warnx(" blocksize: %lu", (unsigned long)geo.blocksize);
warnx(" erasesize: %lu", (unsigned long)geo.erasesize);
warnx(" neraseblocks: %lu", (unsigned long)geo.neraseblocks);
/* Determine the size of each partition. Make each partition an even
* multiple of the erase block size (perhaps not using some space at the
* end of the FLASH).
*/
unsigned blkpererase = geo.erasesize / geo.blocksize;
unsigned nblocks = (geo.neraseblocks / n_partitions) * blkpererase;
unsigned partsize = nblocks * geo.blocksize;
warnx(" No. partitions: %u", n_partitions);
warnx(" Partition size: %lu Blocks (%lu bytes)", (unsigned long)nblocks, (unsigned long)partsize);
/* Now create MTD FLASH partitions */
warnx("Creating partitions");
FAR struct mtd_dev_s *part[n_partitions];
char blockname[32];
unsigned offset;
unsigned i;
for (offset = 0, i = 0; i < n_partitions; offset += nblocks, i++) {
warnx(" Partition %d. Block offset=%lu, size=%lu",
i, (unsigned long)offset, (unsigned long)nblocks);
/* Create the partition */
part[i] = mtd_partition(mtd_dev, offset, nblocks);
if (!part[i]) {
warnx("ERROR: mtd_partition failed. offset=%lu nblocks=%lu",
(unsigned long)offset, (unsigned long)nblocks);
exit(4);
}
/* Initialize to provide an FTL block driver on the MTD FLASH interface */
snprintf(blockname, sizeof(blockname), "/dev/mtdblock%d", i);
ret = ftl_initialize(i, part[i]);
if (ret < 0) {
warnx("ERROR: ftl_initialize %s failed: %d", blockname, ret);
exit(5);
}
/* Now create a character device on the block device */
ret = bchdev_register(blockname, partition_names[i], false);
if (ret < 0) {
warnx("ERROR: bchdev_register %s failed: %d", partition_names[i], ret);
exit(6);
}
}
started = true;
exit(0);
}
static void
mtd_test(void)
{
warnx("This test routine does not test anything yet!");
exit(1);
}
static void
mtd_erase(char *partition_names[], unsigned n_partitions)
{
uint8_t v[64];
memset(v, 0xFF, sizeof(v));
for (uint8_t i = 0; i < n_partitions; i++) {
uint32_t count = 0;
printf("Erasing %s\n", partition_names[i]);
int fd = open(partition_names[i], O_WRONLY);
if (fd == -1) {
errx(1, "Failed to open partition");
}
while (write(fd, &v, sizeof(v)) == sizeof(v)) {
count += sizeof(v);
}
printf("Erased %lu bytes\n", (unsigned long)count);
close(fd);
}
exit(0);
}
#endif