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- /****************************************************************************
- * include/nuttx/fs/smart.h
- * Sector Mapped Allocation for Really Tiny (SMART) FLASH interface
- *
- * Copyright (C) 2013 Ken Pettit. All rights reserved.
- * Author: Ken Pettit <pettitkd@gmail.com>
- *
- * 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.
- *
- ****************************************************************************/
- #ifndef __INCLUDE_NUTTX_SMART_H
- #define __INCLUDE_NUTTX_SMART_H
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <sys/types.h>
- #include <stdint.h>
- #include <stdbool.h>
- /****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
- /* Macros to hide implementation */
- #define SMART_FMT_ISFORMATTED 0x01
- #define SMART_FMT_HASBYTEWRITE 0x02
- /* The logical sector number of the root directory. */
- #define SMARTFS_ROOT_DIR_SECTOR 3
- /* Defines the sector types */
- #define SMARTFS_SECTOR_TYPE_DIR 1
- #define SMARTFS_SECTOR_TYPE_FILE 2
- #ifdef CONFIG_SMART_DEV_LOOP
- /* Loop device IOCTL commands */
- /* Command: SMART_LOOPIOC_SETUP
- * Description: Setup the loop device
- * Argument: A pointer to a read-only instance of struct losetup_s.
- * Dependencies: The loop device must be enabled (CONFIG_DEV_LOOP=y)
- */
- /* Command: SMART_LOOPIOC_TEARDOWN
- * Description: Teardown a loop device previously setup vis LOOPIOC_SETUP
- * Argument: A read-able pointer to the path of the device to be
- * torn down
- * Dependencies: The loop device must be enabled (CONFIG_DEV_LOOP=y)
- */
- #define SMART_LOOPIOC_SETUP _LOOPIOC(0x0001)
- #define SMART_LOOPIOC_TEARDOWN _LOOPIOC(0x0002)
- #endif
- /****************************************************************************
- * Public Types
- ****************************************************************************/
- /* The following defines the format information for the device. This
- * information is retrieved via the BIOC_GETFORMAT ioctl.
- */
- struct smart_format_s
- {
- uint16_t sectorsize; /* Size of one read/write sector */
- uint16_t availbytes; /* Number of bytes available in each sector */
- uint16_t nsectors; /* Total number of sectors on device */
- uint16_t nfreesectors; /* Number of free sectors on device */
- uint8_t flags; /* Format flags (see above) */
- uint8_t namesize; /* Size of filenames on this volume */
- #ifdef CONFIG_SMARTFS_MULTI_ROOT_DIRS
- uint8_t nrootdirentries; /* Number of root directories on this device */
- uint8_t rootdirnum; /* Root directory number for this dev entry */
- #endif
- };
- /* The following defines the information for writing a logical sector
- * to the device.
- */
- struct smart_read_write_s
- {
- uint16_t logsector; /* The logical sector number */
- uint16_t offset; /* Offset within the sector to write to */
- uint16_t count; /* Number of bytes to write */
- const uint8_t *buffer; /* Pointer to the data to write */
- };
- /* The following defines the procfs data exchange interface between the
- * SMART MTD and FS layers.
- */
- #if defined(CONFIG_FS_PROCFS) && !defined(CONFIG_FS_PROCFS_EXCLUDE_SMARTFS)
- struct smart_procfs_data_s
- {
- #ifdef CONFIG_MTD_SMART_ERASE_DEBUG
- const uint16_t *erasecounts; /* Pointer to the erase counts array */
- uint16_t erasesize; /* Number of entries in the erase counts array */
- #endif
- };
- #endif
- #ifdef CONFIG_SMART_DEV_LOOP
- /* This is the structure referred to in the argument to the LOOPIOC_SETUP
- * IOCTL command.
- */
- struct smart_losetup_s
- {
- FAR const char *filename; /* The file or character device to use */
- int minor; /* The minor number of thedevice */
- int erasesize; /* The erase size to use on the file */
- int sectsize; /* The sector / page size of the file */
- off_t offset; /* An offset that may be applied to the device */
- bool readonly; /* True: Read access will be supported only */
- };
- #endif
- /****************************************************************************
- * Public Data
- ****************************************************************************/
- #ifndef __ASSEMBLY__
- #ifdef __cplusplus
- #define EXTERN extern "C"
- extern "C"
- {
- #else
- #define EXTERN extern
- #endif
- /****************************************************************************
- * Public Function Prototypes
- ****************************************************************************/
- #undef EXTERN
- #ifdef __cplusplus
- }
- #endif
- #endif /* __ASSEMBLY__ */
- #endif /* __INCLUDE_NUTTX_SMART_H */
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