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apps/testing/nand_sim: Adds NAND virtual device.

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Adds a NAND virtual device daemon.

Signed-off-by: Saurav Pal <resyfer.dev@gmail.com>
This commit is contained in:
Saurav Pal 2024-03-16 04:28:37 +00:00 committed by Xiang Xiao
parent c15a6970c9
commit f4092962df
5 changed files with 314 additions and 0 deletions
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3
.gitignore vendored
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@ -39,3 +39,6 @@ Make.dep
.dirlinks .dirlinks
.vscode .vscode
.DS_Store .DS_Store
build
.ccls-cache
compile_commands.json

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testing/nand_sim/Kconfig Normal file
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#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#
config TESTING_NAND_SIM
boolean "NAND Flash Simulator"
default n
---help---
Enable the NAND Flash Simulator device.
if TESTING_NAND_SIM
config TESTING_NAND_SIM_SIZE
int "Size of NAND Flash in MB"
default 2
---help---
Size of NAND Flash in Megabytes.
config TESTING_NAND_SIM_DEBUG
int "Debugging mode"
default 1
range 0 2
---help---
0 - Disable debugging mode
1 - Enable debugging mode to standard I/O
2 - Enable debugging mode to a special file
config TESTING_NAND_SIM_STACK
int "Builtin task stack size"
default DEFAULT_TASK_STACKSIZE
---help---
Size of the task to configure when started nand from NSH
endif

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testing/nand_sim/Make.defs Normal file
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############################################################################
# apps/testing/nand_sim/Make.defs
#
# 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.
#
############################################################################
ifneq ($(CONFIG_TESTING_NAND_SIM),)
CONFIGURED_APPS += $(APPDIR)/testing/nand_sim
endif

30
testing/nand_sim/Makefile Normal file
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############################################################################
# apps/testing/nand_sim/Makefile
#
# 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.
#
############################################################################
include $(APPDIR)/Make.defs
PROGNAME = nand
PRIORITY = SCHED_PRIORITY_DEFAULT
STACKSIZE = $(CONFIG_TESTING_NAND_SIM_STACK)
MODULE = $(CONFIG_TESTING_NAND_SIM)
MAINSRC = nand_sim_main.c
include $(APPDIR)/Application.mk

224
testing/nand_sim/nand_sim_main.c Normal file
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/****************************************************************************
* apps/testing/nand_sim/nand_sim_main.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 <debug.h>
#include <stdio.h>
#include <nuttx/drivers/drivers.h>
#include <nuttx/mtd/nand.h>
#include <nuttx/mtd/nand_scheme.h>
#include <nuttx/mtd/nand_ram.h>
#include <nuttx/mtd/nand_wrapper.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define NAND_SIM_NAME "nand"
#define NAND_SIM_PATH "/dev/" NAND_SIM_NAME
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
FAR struct mtd_dev_s *g_nand_sim_mtd_wrapper;
FAR struct mtd_dev_s *g_nand_sim_mtd_under;
FAR struct nand_raw_s *g_nand_mtd_raw;
/****************************************************************************
* External Functions
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: wrapper_init
*
* Description:
* Initializes the wrapper by allocating memory and assiging the methods.
*
* Returned Value:
* 0: Successful
* -ENOMEM: No memory left to allocate device
*
****************************************************************************/
int wrapper_init(void)
{
struct nand_dev_s *under;
struct nand_dev_s *wrapper;
g_nand_sim_mtd_wrapper = kmm_zalloc(sizeof(struct nand_wrapper_dev_s));
if (g_nand_sim_mtd_wrapper == NULL)
{
return -ENOMEM;
}
under = &((struct nand_wrapper_dev_s *)g_nand_sim_mtd_wrapper)->under;
wrapper = &((struct nand_wrapper_dev_s *)g_nand_sim_mtd_wrapper)->wrapper;
memcpy(under, g_nand_sim_mtd_under, sizeof(struct nand_dev_s));
memcpy(wrapper, g_nand_sim_mtd_under, sizeof(struct nand_dev_s));
nand_wrapper_initialize();
((struct mtd_dev_s *)wrapper)->name = NAND_SIM_NAME;
((struct mtd_dev_s *)wrapper)->erase = nand_wrapper_erase;
((struct mtd_dev_s *)wrapper)->bread = nand_wrapper_bread;
((struct mtd_dev_s *)wrapper)->bwrite = nand_wrapper_bwrite;
((struct mtd_dev_s *)wrapper)->ioctl = nand_wrapper_ioctl;
((struct mtd_dev_s *)wrapper)->isbad = nand_wrapper_isbad;
((struct mtd_dev_s *)wrapper)->markbad = nand_wrapper_markbad;
return OK;
}
/****************************************************************************
* Name: terminate
*
* Description:
* Handles the SIGTERM signal by exitting gracefully.
*
****************************************************************************/
void terminate(int sig)
{
kmm_free(g_nand_sim_mtd_under);
kmm_free(g_nand_sim_mtd_wrapper);
unregister_mtddriver(NAND_SIM_PATH);
syslog(LOG_DEBUG, "Exited!\n");
}
/****************************************************************************
* Name: nand_sim_main
*
* Description:
* Entry point of the device emulator.
*
****************************************************************************/
int main(int argc, FAR char *argv[])
{
int ret;
pid_t pid;
/* Daemon */
pid = fork();
if (pid > 0)
{
return OK;
}
if (daemon(0, 1) == -1)
{
ret = EXIT_FAILURE;
goto errout;
}
/* Signal Handlers */
signal(SIGTERM, terminate);
/* Initializers */
/* Raw NAND MTD Device */
g_nand_mtd_raw = kmm_zalloc(sizeof(struct nand_raw_s));
if (g_nand_mtd_raw == NULL)
{
ret = -ENOMEM;
goto errout_with_logs;
}
g_nand_sim_mtd_under = nand_ram_initialize(g_nand_mtd_raw);
if (g_nand_sim_mtd_under == NULL)
{
ret = -EINVAL;
goto errout_with_raw_s;
}
ret = wrapper_init();
if (ret < 0)
{
goto errout_with_mtd_under;
}
/* Under device driver is already copied to wrapper, so free. */
kmm_free(g_nand_sim_mtd_under);
ret = register_mtddriver(NAND_SIM_PATH,
g_nand_sim_mtd_wrapper,
0777, NULL);
if (ret < 0)
{
goto errout_with_mtd_wrapper;
}
printf("Driver running!\n");
/* To keep the daemon still running. All events are handled by signals */
while (1)
{
sleep(1);
}
/* Won't reach this point */
return OK;
errout_with_mtd_wrapper:
kmm_free(g_nand_sim_mtd_wrapper);
errout_with_mtd_under:
kmm_free(g_nand_sim_mtd_under);
errout_with_raw_s:
kmm_free(g_nand_mtd_raw);
errout_with_logs:
unregister_mtddriver(NAND_SIM_PATH);
errout:
return ret;
}