334 lines
10 KiB
C
334 lines
10 KiB
C
/*
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ChibiOS - Copyright (C) 2006,2007,2008,2009,2010,2011,2012,2013,2014,
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2015,2016,2017,2018,2019,2020,2021 Giovanni Di Sirio.
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This file is part of ChibiOS.
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ChibiOS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation version 3 of the License.
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ChibiOS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file vfs/drivers/drvfatfs.c
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* @brief HAL FatFS VFS driver code.
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*
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* @addtogroup VFS_DRV_FATFS
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* @{
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*/
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#include <string.h>
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#include "vfs.h"
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#include "drvfatfs.h"
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#include "ff.h"
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/*===========================================================================*/
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/* Module local definitions. */
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/*===========================================================================*/
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/**
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* @brief Number of directory nodes pre-allocated in the pool.
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*/
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#define DRV_DIR_NODES_NUM 1
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/**
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* @brief Number of file nodes pre-allocated in the pool.
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*/
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#define DRV_FILE_NODES_NUM 2
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/**
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* @brief @p vfs_fatfs_driver_t specific methods.
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*/
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#define __vfs_fatfs_driver_methods \
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__vfs_driver_methods
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/**
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* @brief @p vfs_fatfs_driver_t specific data.
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*/
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#define __vfs_fatfs_driver_data \
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__vfs_driver_data \
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memory_pool_t file_nodes_pool; \
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memory_pool_t dir_nodes_pool;
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/**
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* @brief @p vfs_fatfs_dir_node_t specific methods.
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*/
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#define __vfs_fatfs_dir_node_methods \
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__vfs_directory_node_methods
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/**
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* @brief @p vfs_fatfs_dir_node_t specific data.
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*/
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#define __vfs_fatfs_dir_node_data \
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__vfs_directory_node_data \
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DIR dir;
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/**
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* @brief @p vfs_fatfs_file_node_t specific methods.
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*/
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#define __vfs_fatfs_file_node_methods \
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__vfs_file_node_methods \
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FIL file;
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/**
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* @brief @p vfs_fatfs_file_node_t specific data.
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*/
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#define __vfs_fatfs_file_node_data \
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__vfs_file_node_data \
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BaseSequentialStream *stream;
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/*===========================================================================*/
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/* Module exported variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module local types. */
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/*===========================================================================*/
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/**
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* @brief @p vfs_fatfs_driver_t virtual methods table.
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*/
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struct vfs_fatfs_driver_vmt {
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__vfs_fatfs_driver_methods
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};
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/**
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* @brief Type of a structure representing a VFS FatFS driver.
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*/
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typedef struct vfs_drv_streams {
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/**
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* @brief Virtual Methods Table.
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*/
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const struct vfs_fatfs_driver_vmt *vmt;
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__vfs_fatfs_driver_data
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} vfs_fatfs_driver_t;
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/**
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* @brief @p vfs_fatfs_dir_node_t virtual methods table.
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*/
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struct vfs_fatfs_dir_node_vmt {
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__vfs_fatfs_dir_node_methods
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};
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/**
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* @brief Type of a structure representing a FatFS directory VFS node.
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*/
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typedef struct vfs_fatfs_dir_node {
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/**
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* @brief Virtual Methods Table.
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*/
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const struct vfs_fatfs_dir_node_vmt *vmt;
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__vfs_fatfs_dir_node_data
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} vfs_fatfs_dir_node_t;
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/**
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* @brief @p vfs_fatfs_file_node_t virtual methods table.
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*/
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struct vfs_fatfs_file_node_vmt {
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__vfs_fatfs_file_node_methods
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};
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/**
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* @brief Type of a structure representing a FatFS file VFS node.
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*/
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typedef struct vfs_fatfs_file_node {
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/**
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* @brief Virtual Methods Table.
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*/
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const struct vfs_fatfs_file_node_vmt *vmt;
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__vfs_fatfs_file_node_data
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} vfs_fatfs_file_node_t;
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/*===========================================================================*/
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/* Module local variables. */
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/*===========================================================================*/
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static msg_t drv_open_dir(void *instance,
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const char *path,
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vfs_directory_node_t **vdnpp);
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static msg_t drv_open_file(void *instance,
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const char *path,
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unsigned mode,
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vfs_file_node_t **vfnpp);
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static const struct vfs_fatfs_driver_vmt driver_vmt = {
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.open_dir = drv_open_dir,
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.open_file = drv_open_file
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};
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static void node_dir_release(void *instance);
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static msg_t node_dir_first(void *instance, vfs_node_info_t *nip);
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static msg_t node_dir_next(void *instance, vfs_node_info_t *nip);
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static const struct vfs_fatfs_dir_node_vmt dir_node_vmt = {
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.release = node_dir_release,
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.dir_first = node_dir_first,
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.dir_next = node_dir_next
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};
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static void node_file_release(void *instance);
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static BaseSequentialStream *node_file_get_stream(void *instance);
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static ssize_t node_file_read(void *instance, uint8_t *buf, size_t n);
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static ssize_t node_file_write(void *instance, const uint8_t *buf, size_t n);
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static msg_t node_file_setpos(void *instance, vfs_offset_t offset);
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static vfs_offset_t node_file_getpos(void *instance);
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static vfs_offset_t node_file_getsize(void *instance);
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static const struct vfs_fatfs_file_node_vmt file_node_vmt = {
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.release = node_file_release,
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.file_get_stream = node_file_get_stream,
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.file_read = node_file_read,
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.file_write = node_file_write,
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.file_setpos = node_file_setpos,
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.file_getpos = node_file_getpos,
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.file_getsize = node_file_getsize
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};
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static vfs_fatfs_dir_node_t drv_dir_nodes[DRV_DIR_NODES_NUM];
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static vfs_fatfs_file_node_t drv_file_nodes[DRV_FILE_NODES_NUM];
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static vfs_fatfs_driver_t drv_fatfs;
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/*===========================================================================*/
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/* Module local functions. */
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/*===========================================================================*/
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static msg_t drv_open_dir(void *instance,
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const char *path,
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vfs_directory_node_t **vdnpp) {
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vfs_fatfs_driver_t *drvp = (vfs_fatfs_driver_t *)instance;
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msg_t err;
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do {
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err = VFS_RET_NO_RESOURCE;
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}
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while (false);
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return err;
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}
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static msg_t drv_open_file(void *instance,
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const char *path,
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unsigned mode,
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vfs_file_node_t **vfnpp) {
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vfs_fatfs_driver_t *drvp = (vfs_fatfs_driver_t *)instance;
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msg_t err;
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do {
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err = VFS_RET_NOT_FOUND;
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}
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while (false);
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return err;
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}
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static void node_dir_release(void *instance) {
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vfs_fatfs_dir_node_t *ffdnp = (vfs_fatfs_dir_node_t *)instance;
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if (--ffdnp->refs == 0U) {
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chPoolFree(&((vfs_fatfs_driver_t *)ffdnp->driver)->dir_nodes_pool,
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(void *)ffdnp);
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}
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}
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static msg_t node_dir_first(void *instance, vfs_node_info_t *nip) {
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vfs_fatfs_dir_node_t *ffdnp = (vfs_fatfs_dir_node_t *)instance;
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return VFS_RET_EOF;
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}
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static msg_t node_dir_next(void *instance, vfs_node_info_t *nip) {
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vfs_fatfs_dir_node_t *ffdnp = (vfs_fatfs_dir_node_t *)instance;
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return VFS_RET_EOF;
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}
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static void node_file_release(void *instance) {
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vfs_fatfs_file_node_t *fffnp = (vfs_fatfs_file_node_t *)instance;
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if (--fffnp->refs == 0U) {
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chPoolFree(&((vfs_fatfs_driver_t *)fffnp->driver)->file_nodes_pool,
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(void *)fffnp);
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}
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}
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static BaseSequentialStream *node_file_get_stream(void *instance) {
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vfs_fatfs_file_node_t *fffnp = (vfs_fatfs_file_node_t *)instance;
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return fffnp->stream;
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}
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static ssize_t node_file_read(void *instance, uint8_t *buf, size_t n) {
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vfs_fatfs_file_node_t *fffnp = (vfs_fatfs_file_node_t *)instance;
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return streamRead(fffnp->stream, buf, n);
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}
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static ssize_t node_file_write(void *instance, const uint8_t *buf, size_t n) {
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vfs_fatfs_file_node_t *fffnp = (vfs_fatfs_file_node_t *)instance;
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return streamWrite(fffnp->stream, buf, n);
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}
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static msg_t node_file_setpos(void *instance, vfs_offset_t offset) {
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(void)instance;
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(void)offset;
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return VFS_RET_NOT_IMPLEMENTED;
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}
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static vfs_offset_t node_file_getpos(void *instance) {
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(void)instance;
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return 0U;
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}
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static vfs_offset_t node_file_getsize(void *instance) {
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(void)instance;
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return 0U;
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}
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/*===========================================================================*/
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/* Module exported functions. */
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/*===========================================================================*/
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vfs_driver_t *drvFatfsInit(const char *rootname) {
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drv_fatfs.vmt = &driver_vmt;
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drv_fatfs.rootname = rootname;
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chPoolObjectInit(&drv_fatfs.dir_nodes_pool,
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sizeof (vfs_fatfs_dir_node_t),
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chCoreAllocAligned);
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chPoolLoadArray(&drv_fatfs.dir_nodes_pool,
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drv_dir_nodes,
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DRV_DIR_NODES_NUM);
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chPoolObjectInit(&drv_fatfs.file_nodes_pool,
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sizeof (vfs_fatfs_file_node_t),
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chCoreAllocAligned);
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chPoolLoadArray(&drv_fatfs.file_nodes_pool,
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drv_file_nodes,
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DRV_FILE_NODES_NUM);
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return (vfs_driver_t *)&drv_fatfs;
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}
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/** @} */
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