From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by canuck.infradead.org with esmtps (Exim 4.72 #1 (Red Hat Linux)) id 1Q9I1H-0006Be-Bq for barebox@lists.infradead.org; Mon, 11 Apr 2011 14:23:24 +0000 From: Sascha Hauer Date: Mon, 11 Apr 2011 16:23:09 +0200 Message-Id: <1302531789-25169-2-git-send-email-s.hauer@pengutronix.de> In-Reply-To: <1302531789-25169-1-git-send-email-s.hauer@pengutronix.de> References: <1302531789-25169-1-git-send-email-s.hauer@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH] fs: add fat filesystem support To: barebox@lists.infradead.org This code is based on: http://elm-chan.org/fsw/ff/00index_e.html FatFs Generic FAT File System Module This patch offers a read/write implementation for barebox. The code does not exaclty match barebox coding style, but works nicely and should be ready to give it a try. Signed-off-by: Sascha Hauer --- fs/Kconfig | 2 + fs/Makefile | 1 + fs/fat/Kconfig | 15 + fs/fat/Makefile | 1 + fs/fat/diskio.h | 78 ++ fs/fat/fat.c | 434 +++++++++ fs/fat/ff.c | 2761 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/fat/ff.h | 239 +++++ fs/fat/ffconf.h | 145 +++ fs/fat/integer.h | 28 + 10 files changed, 3704 insertions(+), 0 deletions(-) create mode 100644 fs/fat/Kconfig create mode 100644 fs/fat/Makefile create mode 100644 fs/fat/diskio.h create mode 100644 fs/fat/fat.c create mode 100644 fs/fat/ff.c create mode 100644 fs/fat/ff.h create mode 100644 fs/fat/ffconf.h create mode 100644 fs/fat/integer.h diff --git a/fs/Kconfig b/fs/Kconfig index d05797a..56c02da 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -16,6 +16,8 @@ config FS_DEVFS default y prompt "devfs support" +source fs/fat/Kconfig + config PARTITION_NEED_MTD bool diff --git a/fs/Makefile b/fs/Makefile index 4aa92ef..7cae2b6 100644 --- a/fs/Makefile +++ b/fs/Makefile @@ -2,4 +2,5 @@ obj-$(CONFIG_FS_CRAMFS) += cramfs/ obj-$(CONFIG_FS_RAMFS) += ramfs.o obj-y += devfs-core.o obj-$(CONFIG_FS_DEVFS) += devfs.o +obj-$(CONFIG_FS_FAT) += fat/ obj-y += fs.o diff --git a/fs/fat/Kconfig b/fs/fat/Kconfig new file mode 100644 index 0000000..0699728 --- /dev/null +++ b/fs/fat/Kconfig @@ -0,0 +1,15 @@ +menuconfig FS_FAT + bool + prompt "FAT filesystem support" + +if FS_FAT + +config FS_FAT_WRITE + bool + prompt "FAT write support" + +config FS_FAT_LFN + bool + prompt "Support long filenames" + +endif diff --git a/fs/fat/Makefile b/fs/fat/Makefile new file mode 100644 index 0000000..efc89ec --- /dev/null +++ b/fs/fat/Makefile @@ -0,0 +1 @@ +obj-y += ff.o fat.o diff --git a/fs/fat/diskio.h b/fs/fat/diskio.h new file mode 100644 index 0000000..f0d29dc --- /dev/null +++ b/fs/fat/diskio.h @@ -0,0 +1,78 @@ +/*----------------------------------------------------------------------- +/ Low level disk interface modlue include file +/-----------------------------------------------------------------------*/ + +#ifndef _DISKIO + +#define _READONLY 0 /* 1: Remove write functions */ +#define _USE_IOCTL 1 /* 1: Use disk_ioctl fucntion */ + +#include "integer.h" + + +/* Status of Disk Functions */ +typedef BYTE DSTATUS; + +/* Results of Disk Functions */ +typedef enum { + RES_OK = 0, /* 0: Successful */ + RES_ERROR, /* 1: R/W Error */ + RES_WRPRT, /* 2: Write Protected */ + RES_NOTRDY, /* 3: Not Ready */ + RES_PARERR /* 4: Invalid Parameter */ +} DRESULT; + + +/*---------------------------------------*/ +/* Prototypes for disk control functions */ + +int assign_drives (int, int); +DSTATUS disk_initialize (FATFS *fatfs); +DSTATUS disk_status (FATFS *fatfs); +DRESULT disk_read (FATFS *fatfs, BYTE*, DWORD, BYTE); +#if _READONLY == 0 +DRESULT disk_write (FATFS *fatfs, const BYTE*, DWORD, BYTE); +#endif +DRESULT disk_ioctl (FATFS *fatfs, BYTE, void*); + + + +/* Disk Status Bits (DSTATUS) */ + +#define STA_NOINIT 0x01 /* Drive not initialized */ +#define STA_NODISK 0x02 /* No medium in the drive */ +#define STA_PROTECT 0x04 /* Write protected */ + + +/* Command code for disk_ioctrl fucntion */ + +/* Generic command (defined for FatFs) */ +#define CTRL_SYNC 0 /* Flush disk cache (for write functions) */ +#define GET_SECTOR_COUNT 1 /* Get media size (for only f_mkfs()) */ +#define GET_SECTOR_SIZE 2 /* Get sector size (for multiple sector size (_MAX_SS >= 1024)) */ +#define GET_BLOCK_SIZE 3 /* Get erase block size (for only f_mkfs()) */ +#define CTRL_ERASE_SECTOR 4 /* Force erased a block of sectors (for only _USE_ERASE) */ + +/* Generic command */ +#define CTRL_POWER 5 /* Get/Set power status */ +#define CTRL_LOCK 6 /* Lock/Unlock media removal */ +#define CTRL_EJECT 7 /* Eject media */ + +/* MMC/SDC specific ioctl command */ +#define MMC_GET_TYPE 10 /* Get card type */ +#define MMC_GET_CSD 11 /* Get CSD */ +#define MMC_GET_CID 12 /* Get CID */ +#define MMC_GET_OCR 13 /* Get OCR */ +#define MMC_GET_SDSTAT 14 /* Get SD status */ + +/* ATA/CF specific ioctl command */ +#define ATA_GET_REV 20 /* Get F/W revision */ +#define ATA_GET_MODEL 21 /* Get model name */ +#define ATA_GET_SN 22 /* Get serial number */ + +/* NAND specific ioctl command */ +#define NAND_FORMAT 30 /* Create physical format */ + + +#define _DISKIO +#endif diff --git a/fs/fat/fat.c b/fs/fat/fat.c new file mode 100644 index 0000000..4219801 --- /dev/null +++ b/fs/fat/fat.c @@ -0,0 +1,434 @@ +/* + * ramfs.c - a malloc based filesystem + * + * Copyright (c) 2007 Sascha Hauer , Pengutronix + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "ff.h" +#include "integer.h" +#include "diskio.h" + +struct fat_priv { + struct cdev *cdev; + FATFS fat; +}; + +/* ---------------------------------------------------------------*/ + +DRESULT disk_read(FATFS *fat, BYTE *buf, DWORD sector, BYTE count) +{ + struct fat_priv *priv = fat->userdata; + int ret; + + debug("%s: sector: %ld count: %d\n", __func__, sector, count); + + ret = cdev_read(priv->cdev, buf, count << 9, sector * 512, 0); + if (ret != count << 9) + return ret; + + return 0; +} + +DRESULT disk_write(FATFS *fat, const BYTE *buf, DWORD sector, BYTE count) +{ + struct fat_priv *priv = fat->userdata; + int ret; + + debug("%s: buf: %p sector: %ld count: %d\n", + __func__, buf, sector, count); + + ret = cdev_write(priv->cdev, buf, count << 9, sector * 512, 0); + if (ret != count << 9) + return ret; + + return 0; +} + +DSTATUS disk_status(FATFS *fat) +{ + return 0; +} + +DWORD get_fattime(void) +{ + return 0; +} + +DRESULT disk_ioctl (FATFS *fat, BYTE command, void *buf) +{ + return 0; +} + +WCHAR ff_convert(WCHAR src, UINT dir) +{ + if (src <= 0x80) + return src; + else + return '?'; +} + +WCHAR ff_wtoupper(WCHAR chr) +{ + if (chr <= 0x80) + return toupper(chr); + else + return '?'; +} + +/* ---------------------------------------------------------------*/ + +#ifdef CONFIG_FS_FAT_WRITE +static int fat_create(struct device_d *dev, const char *pathname, mode_t mode) +{ + struct fat_priv *priv = dev->priv; + FIL f_file; + int ret; + + ret = f_open(&priv->fat, &f_file, pathname, FA_OPEN_ALWAYS); + if (ret) + return -EINVAL; + + f_close(&f_file); + + return 0; +} + +static int fat_unlink(struct device_d *dev, const char *pathname) +{ + struct fat_priv *priv = dev->priv; + int ret; + + ret = f_unlink(&priv->fat, pathname); + if (ret) + return ret; + + cdev_flush(priv->cdev); + + return 0; +} + +static int fat_mkdir(struct device_d *dev, const char *pathname) +{ + struct fat_priv *priv = dev->priv; + int ret; + + ret = f_mkdir(&priv->fat, pathname); + if (ret) + return ret; + + cdev_flush(priv->cdev); + + return 0; +} + +static int fat_rmdir(struct device_d *dev, const char *pathname) +{ + struct fat_priv *priv = dev->priv; + int ret; + + ret = f_unlink(&priv->fat, pathname); + if (ret) + return ret; + + cdev_flush(priv->cdev); + + return 0; +} + +static int fat_write(struct device_d *_dev, FILE *f, const void *buf, size_t insize) +{ + FIL *f_file = f->inode; + int outsize; + int ret; + + ret = f_write(f_file, buf, insize, &outsize); + + debug("%s: %d %d %d %p\n", __func__, ret, insize, outsize, f_file); + + if (ret) + return ret; + if (!outsize) + return -ENOSPC; + + return outsize; +} + +static int fat_truncate(struct device_d *dev, FILE *f, ulong size) +{ + FIL *f_file = f->inode; + unsigned long lastofs; + int ret; + + lastofs = f_file->fptr; + + ret = f_lseek(f_file, size); + if (ret) + return ret; + + ret = f_truncate(f_file); + if (ret) + return ret; + + ret = f_lseek(f_file, lastofs); + if (ret) + return ret; + + return 0; +} +#endif /* CONFIG_FS_FAT_WRITE */ + +static int fat_open(struct device_d *dev, FILE *file, const char *filename) +{ + struct fat_priv *priv = dev->priv; + FIL *f_file; + int ret; + unsigned long flags = 0; + + f_file = xzalloc(sizeof(*f_file)); + + switch (file->flags & O_ACCMODE) { + case O_RDONLY: + flags = FA_READ; + break; + case O_WRONLY: + flags = FA_WRITE; + break; + case O_RDWR: + flags = FA_READ | FA_WRITE; + break; + } + + ret = f_open(&priv->fat, f_file, filename, flags); + if (ret) { + free(f_file); + return -EINVAL; + } + + if (file->flags & O_APPEND) { + ret = f_lseek(f_file, f_file->fsize); + } + + file->inode = f_file; + file->size = f_file->fsize; + + return 0; +} + +static int fat_close(struct device_d *dev, FILE *f) +{ + struct fat_priv *priv = dev->priv; + FIL *f_file = f->inode; + + f_close(f_file); + + free(f_file); + + cdev_flush(priv->cdev); + + return 0; +} + +static int fat_read(struct device_d *_dev, FILE *f, void *buf, size_t insize) +{ + int ret; + FIL *f_file = f->inode; + int outsize; + + ret = f_read(f_file, buf, insize, &outsize); + + debug("%s: %d %d %d %p\n", __func__, ret, insize, outsize, f_file); + + if (ret) + return ret; + + return outsize; +} + +static off_t fat_lseek(struct device_d *dev, FILE *f, off_t pos) +{ + FIL *f_file = f->inode; + int ret; + + ret = f_lseek(f_file, pos); + if (ret) + return ret; + + return pos; +} + +static DIR* fat_opendir(struct device_d *dev, const char *pathname) +{ + struct fat_priv *priv = dev->priv; + DIR *dir; + FF_DIR *ff_dir; + int ret; + + debug("%s: %s\n", __func__, pathname); + + ff_dir = xzalloc(sizeof(*ff_dir)); + if (pathname) + ret = f_opendir(&priv->fat, ff_dir, pathname); + else + ret = f_opendir(&priv->fat, ff_dir, "/"); + + if (ret) + return NULL; + + dir = xzalloc(sizeof(*dir)); + + dir->priv = ff_dir; + + return dir; +} + +static struct dirent* fat_readdir(struct device_d *dev, DIR *dir) +{ + FF_DIR *ff_dir = dir->priv; + FILINFO finfo; + int ret; +#ifdef CONFIG_FS_FAT_LFN + char name[PATH_MAX]; +#endif + memset(&finfo, 0, sizeof(finfo)); +#ifdef CONFIG_FS_FAT_LFN + finfo.lfname = name; + finfo.lfsize = PATH_MAX; +#endif + ret = f_readdir(ff_dir, &finfo); + if (ret) + return NULL; + + if (finfo.fname[0] == '\0') + return NULL; + +#ifdef CONFIG_FS_FAT_LFN + if (*finfo.lfname) + strcpy(dir->d.d_name, finfo.lfname); + else +#endif + strcpy(dir->d.d_name, finfo.fname); + + return &dir->d; +} + +static int fat_closedir(struct device_d *dev, DIR *dir) +{ + FF_DIR *ff_dir = dir->priv; + + free(ff_dir); + free(dir); + + return 0; +} + +static int fat_stat(struct device_d *dev, const char *filename, struct stat *s) +{ + struct fat_priv *priv = dev->priv; + FILINFO finfo; + int ret; + + ret = f_stat(&priv->fat, filename, &finfo); + if (ret) + return ret; + + s->st_size = finfo.fsize; + s->st_mode = S_IRWXU | S_IRWXG | S_IRWXO; + + if (finfo.fattrib & AM_DIR) + s->st_mode |= S_IFDIR; + else + s->st_mode |= S_IFREG; + + return 0; +} + +static int fat_probe(struct device_d *dev) +{ + struct fs_device_d *fsdev = dev->type_data; + struct fat_priv *priv = xzalloc(sizeof(struct fat_priv)); + char *backingstore = fsdev->backingstore; + + dev->priv = priv; + + if (!strncmp(backingstore , "/dev/", 5)) + backingstore += 5; + + priv->cdev = cdev_open(backingstore, O_RDWR); + if (!priv->cdev) + return -EINVAL; + + priv->fat.userdata = priv; + f_mount(&priv->fat); + + return 0; +} + +static void fat_remove(struct device_d *dev) +{ + struct fat_priv *priv = dev->priv; + + cdev_close(priv->cdev); + + free(dev->priv); +} + +static struct fs_driver_d fat_driver = { + .open = fat_open, + .close = fat_close, + .read = fat_read, + .lseek = fat_lseek, + .opendir = fat_opendir, + .readdir = fat_readdir, + .closedir = fat_closedir, + .stat = fat_stat, +#ifdef CONFIG_FS_FAT_WRITE + .create = fat_create, + .unlink = fat_unlink, + .mkdir = fat_mkdir, + .rmdir = fat_rmdir, + .write = fat_write, + .truncate = fat_truncate, +#endif + .flags = 0, + .drv = { + .probe = fat_probe, + .remove = fat_remove, + .name = "fat", + .type_data = &fat_driver, + } +}; + +static int fat_init(void) +{ + return register_fs_driver(&fat_driver); +} + +coredevice_initcall(fat_init); + diff --git a/fs/fat/ff.c b/fs/fat/ff.c new file mode 100644 index 0000000..bcd0a93 --- /dev/null +++ b/fs/fat/ff.c @@ -0,0 +1,2761 @@ +/*----------------------------------------------------------------------------/ +/ FatFs - FAT file system module R0.08b (C)ChaN, 2011 +/-----------------------------------------------------------------------------/ +/ FatFs module is a generic FAT file system module for small embedded systems. +/ This is a free software that opened for education, research and commercial +/ developments under license policy of following terms. +/ +/ Copyright (C) 2011, ChaN, all right reserved. +/ +/ * The FatFs module is a free software and there is NO WARRANTY. +/ * No restriction on use. You can use, modify and redistribute it for +/ personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY. +/ * Redistributions of source code must retain the above copyright notice. +/ +/-----------------------------------------------------------------------------/ +/ Feb 26,'06 R0.00 Prototype. +/ +/ Apr 29,'06 R0.01 First stable version. +/ +/ Jun 01,'06 R0.02 Added FAT12 support. +/ Removed unbuffered mode. +/ Fixed a problem on small (<32M) partition. +/ Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM). +/ +/ Sep 22,'06 R0.03 Added f_rename(). +/ Changed option _FS_MINIMUM to _FS_MINIMIZE. +/ Dec 11,'06 R0.03a Improved cluster scan algorithm to write files fast. +/ Fixed f_mkdir() creates incorrect directory on FAT32. +/ +/ Feb 04,'07 R0.04 Supported multiple drive system. +/ Changed some interfaces for multiple drive system. +/ Changed f_mountdrv() to f_mount(). +/ Added f_mkfs(). +/ Apr 01,'07 R0.04a Supported multiple partitions on a physical drive. +/ Added a capability of extending file size to f_lseek(). +/ Added minimization level 3. +/ Fixed an endian sensitive code in f_mkfs(). +/ May 05,'07 R0.04b Added a configuration option _USE_NTFLAG. +/ Added FSInfo support. +/ Fixed DBCS name can result FR_INVALID_NAME. +/ Fixed short seek (<= csize) collapses the file object. +/ +/ Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs(). +/ Fixed f_mkfs() on FAT32 creates incorrect FSInfo. +/ Fixed f_mkdir() on FAT32 creates incorrect directory. +/ Feb 03,'08 R0.05a Added f_truncate() and f_utime(). +/ Fixed off by one error at FAT sub-type determination. +/ Fixed btr in f_read() can be mistruncated. +/ Fixed cached sector is not flushed when create and close without write. +/ +/ Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets(). +/ Improved performance of f_lseek() on moving to the same or following cluster. +/ +/ Apr 01,'09 R0.07 Merged Tiny-FatFs as a configuration option. (_FS_TINY) +/ Added long file name feature. +/ Added multiple code page feature. +/ Added re-entrancy for multitask operation. +/ Added auto cluster size selection to f_mkfs(). +/ Added rewind option to f_readdir(). +/ Changed result code of critical errors. +/ Renamed string functions to avoid name collision. +/ Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg. +/ Added multiple sector size feature. +/ Jun 21,'09 R0.07c Fixed f_unlink() can return 0 on error. +/ Fixed wrong cache control in f_lseek(). +/ Added relative path feature. +/ Added f_chdir() and f_chdrive(). +/ Added proper case conversion to extended char. +/ Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h. +/ Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH. +/ Fixed name matching error on the 13 char boundary. +/ Added a configuration option, _LFN_UNICODE. +/ Changed f_readdir() to return the SFN with always upper case on non-LFN cfg. +/ +/ May 15,'10 R0.08 Added a memory configuration option. (_USE_LFN = 3) +/ Added file lock feature. (_FS_SHARE) +/ Added fast seek feature. (_USE_FASTSEEK) +/ Changed some types on the API, XCHAR->TCHAR. +/ Changed fname member in the FILINFO structure on Unicode cfg. +/ String functions support UTF-8 encoding files on Unicode cfg. +/ Aug 16,'10 R0.08a Added f_getcwd(). (_FS_RPATH = 2) +/ Added sector erase feature. (_USE_ERASE) +/ Moved file lock semaphore table from fs object to the bss. +/ Fixed a wrong directory entry is created on non-LFN cfg when the given name contains ';'. +/ Fixed f_mkfs() creates wrong FAT32 volume. +/ Jan 15,'11 R0.08b Fast seek feature is also applied to f_read() and f_write(). +/ f_lseek() reports required table size on creating CLMP. +/ Extended format syntax of f_printf function. +/ Ignores duplicated directory separators in given path names. +/---------------------------------------------------------------------------*/ + +#include +#include +#include +#include +#include "ff.h" /* FatFs configurations and declarations */ +#include "diskio.h" /* Declarations of low level disk I/O functions */ + +#if _FATFS != 8237 +#error Wrong include file (ff.h). +#endif + +/* Definitions on sector size */ +#if _MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096 +#error Wrong sector size. +#endif +#if _MAX_SS != 512 +#define SS(fs) ((fs)->ssize) /* Multiple sector size */ +#else +#define SS(fs) 512U /* Fixed sector size */ +#endif + +#define ABORT(fs, res) { fp->flag |= FA__ERROR; return res; } + +/* Misc definitions */ +#define LD_CLUST(dir) (((DWORD)LD_WORD(dir+DIR_FstClusHI)<<16) | LD_WORD(dir+DIR_FstClusLO)) +#define ST_CLUST(dir,cl) {ST_WORD(dir+DIR_FstClusLO, cl); ST_WORD(dir+DIR_FstClusHI, (DWORD)cl>>16);} + + +/* DBCS code ranges and SBCS extend char conversion table */ + +/* Codepage 437 (US OEM) */ +#define _DF1S 0 +#define _EXCVT { \ + 0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ + 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ + 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF, \ + 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ + 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ + 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ + 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ + 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF, \ +} + +#define IsDBCS1(c) 0 +#define IsDBCS2(c) 0 + +/* Name status flags */ +#define NS 11 /* Index of name status byte in fn[] */ +#define NS_LOSS 0x01 /* Out of 8.3 format */ +#define NS_LFN 0x02 /* Force to create LFN entry */ +#define NS_LAST 0x04 /* Last segment */ +#define NS_BODY 0x08 /* Lower case flag (body) */ +#define NS_EXT 0x10 /* Lower case flag (ext) */ +#define NS_DOT 0x20 /* Dot entry */ + + +/* FAT sub-type boundaries */ +/* Note that the FAT spec by Microsoft says 4085 but Windows works with 4087! */ +#define MIN_FAT16 4086 /* Minimum number of clusters for FAT16 */ +#define MIN_FAT32 65526 /* Minimum number of clusters for FAT32 */ + + +/* FatFs refers the members in the FAT structures as byte array instead of +/ structure member because the structure is not binary compatible between +/ different platforms */ + +#define BS_jmpBoot 0 /* Jump instruction (3) */ +#define BS_OEMName 3 /* OEM name (8) */ +#define BPB_BytsPerSec 11 /* Sector size [byte] (2) */ +#define BPB_SecPerClus 13 /* Cluster size [sector] (1) */ +#define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */ +#define BPB_NumFATs 16 /* Number of FAT copies (1) */ +#define BPB_RootEntCnt 17 /* Number of root dir entries for FAT12/16 (2) */ +#define BPB_TotSec16 19 /* Volume size [sector] (2) */ +#define BPB_Media 21 /* Media descriptor (1) */ +#define BPB_FATSz16 22 /* FAT size [sector] (2) */ +#define BPB_SecPerTrk 24 /* Track size [sector] (2) */ +#define BPB_NumHeads 26 /* Number of heads (2) */ +#define BPB_HiddSec 28 /* Number of special hidden sectors (4) */ +#define BPB_TotSec32 32 /* Volume size [sector] (4) */ +#define BS_DrvNum 36 /* Physical drive number (2) */ +#define BS_BootSig 38 /* Extended boot signature (1) */ +#define BS_VolID 39 /* Volume serial number (4) */ +#define BS_VolLab 43 /* Volume label (8) */ +#define BS_FilSysType 54 /* File system type (1) */ +#define BPB_FATSz32 36 /* FAT size [sector] (4) */ +#define BPB_ExtFlags 40 /* Extended flags (2) */ +#define BPB_FSVer 42 /* File system version (2) */ +#define BPB_RootClus 44 /* Root dir first cluster (4) */ +#define BPB_FSInfo 48 /* Offset of FSInfo sector (2) */ +#define BPB_BkBootSec 50 /* Offset of backup boot sectot (2) */ +#define BS_DrvNum32 64 /* Physical drive number (2) */ +#define BS_BootSig32 66 /* Extended boot signature (1) */ +#define BS_VolID32 67 /* Volume serial number (4) */ +#define BS_VolLab32 71 /* Volume label (8) */ +#define BS_FilSysType32 82 /* File system type (1) */ +#define FSI_LeadSig 0 /* FSI: Leading signature (4) */ +#define FSI_StrucSig 484 /* FSI: Structure signature (4) */ +#define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */ +#define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */ +#define MBR_Table 446 /* MBR: Partition table offset (2) */ +#define SZ_PTE 16 /* MBR: Size of a partition table entry */ +#define BS_55AA 510 /* Boot sector signature (2) */ + +#define DIR_Name 0 /* Short file name (11) */ +#define DIR_Attr 11 /* Attribute (1) */ +#define DIR_NTres 12 /* NT flag (1) */ +#define DIR_CrtTime 14 /* Created time (2) */ +#define DIR_CrtDate 16 /* Created date (2) */ +#define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */ +#define DIR_WrtTime 22 /* Modified time (2) */ +#define DIR_WrtDate 24 /* Modified date (2) */ +#define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */ +#define DIR_FileSize 28 /* File size (4) */ +#define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */ +#define LDIR_Attr 11 /* LFN attribute (1) */ +#define LDIR_Type 12 /* LFN type (1) */ +#define LDIR_Chksum 13 /* Sum of corresponding SFN entry */ +#define LDIR_FstClusLO 26 /* Filled by zero (0) */ +#define SZ_DIR 32 /* Size of a directory entry */ +#define LLE 0x40 /* Last long entry flag in LDIR_Ord */ +#define DDE 0xE5 /* Deleted directory enrty mark in DIR_Name[0] */ +#define NDDE 0x05 /* Replacement of a character collides with DDE */ + +#ifndef CONFIG_FS_FAT_LFN +#define DEF_NAMEBUF BYTE sfn[12] +#define INIT_BUF(dobj) (dobj).fn = sfn +#define FREE_BUF() + +#else +static WCHAR LfnBuf[_MAX_LFN+1]; +#define DEF_NAMEBUF BYTE sfn[12] +#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; } +#define FREE_BUF() +#endif + +/* + * Change window offset + */ +struct fat_sector { + DWORD sector; + struct list_head list; + unsigned char data[0]; +}; + +#ifdef CONFIG_FS_FAT_WRITE +static int push_fat_sector(FATFS *fs, DWORD sector) +{ + struct fat_sector *s; + + list_for_each_entry(s, &fs->dirtylist, list) { + if (s->sector == sector) { + memcpy(s->data, fs->win, SS(fs)); + return 0; + } + } + + s = xmalloc(sizeof(*s) + SS(fs)); + memcpy(s->data, fs->win, SS(fs)); + s->sector = sector; + list_add_tail(&s->list, &fs->dirtylist); + + return 0; +} +#endif + +static int get_fat_sector(FATFS *fs, DWORD sector) +{ + struct fat_sector *s; + + list_for_each_entry(s, &fs->dirtylist, list) { + if (s->sector == sector) { + memcpy(fs->win, s->data, SS(fs)); + return 0; + } + } + + return disk_read(fs, fs->win, sector, 1); +} + +#ifdef CONFIG_FS_FAT_WRITE +static int flush_dirty_fat(FATFS *fs) +{ + struct fat_sector *s, *tmp; + + list_for_each_entry_safe(s, tmp, &fs->dirtylist, list) { + disk_write(fs, s->data, s->sector, 1); + if (s->sector < (fs->fatbase + fs->fsize)) { + /* In FAT area */ + BYTE nf; + DWORD wsect = s->sector; + /* Reflect the change to all FAT copies */ + for (nf = fs->n_fats; nf > 1; nf--) { + wsect += fs->fsize; + disk_write(fs, s->data, wsect, 1); + } + } + list_del(&s->list); + free(s); + } + + return 0; +} +#endif + +static int move_window ( + FATFS *fs, /* File system object */ + DWORD sector /* Sector number to make appearance in the fs->win[] */ +) /* Move to zero only writes back dirty window */ +{ + DWORD wsect; + int ret; + + wsect = fs->winsect; + if (wsect != sector) { /* Changed current window */ +#ifdef CONFIG_FS_FAT_WRITE + /* Write back dirty window if needed */ + if (fs->wflag) { + ret = push_fat_sector(fs, wsect); + if (ret) + return ret; + fs->wflag = 0; + } +#endif + if (sector) { + ret = get_fat_sector(fs, sector); + if (ret) + return ret; + fs->winsect = sector; + } + } + + return 0; +} + +/* + * Clean-up cached data + */ +#ifdef CONFIG_FS_FAT_WRITE +static +int sync ( /* 0: successful, -EIO: failed */ + FATFS *fs /* File system object */ +) +{ + int res; + + res = move_window(fs, 0); + if (res == 0) { + /* Update FSInfo sector if needed */ + if (fs->fs_type == FS_FAT32 && fs->fsi_flag) { + fs->winsect = 0; + /* Create FSInfo structure */ + memset(fs->win, 0, 512); + ST_WORD(fs->win+BS_55AA, 0xAA55); + ST_DWORD(fs->win+FSI_LeadSig, 0x41615252); + ST_DWORD(fs->win+FSI_StrucSig, 0x61417272); + ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust); + ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust); + /* Write it into the FSInfo sector */ + disk_write(fs, fs->win, fs->fsi_sector, 1); + fs->fsi_flag = 0; + } + /* Make sure that no pending write process in the physical drive */ + if (disk_ioctl(fs, CTRL_SYNC, (void*)0) != RES_OK) + res = -EIO; + } + + return res; +} +#endif + +/* + * Get sector# from cluster# + */ +DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */ + FATFS *fs, /* File system object */ + DWORD clst /* Cluster# to be converted */ +) +{ + clst -= 2; + if (clst >= (fs->n_fatent - 2)) + return 0; /* Invalid cluster */ + return clst * fs->csize + fs->database; +} + +/* + * FAT access - Read value of a FAT entry + */ +DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */ + FATFS *fs, /* File system object */ + DWORD clst /* Cluster# to get the link information */ +) +{ + UINT wc, bc; + BYTE *p; + + + if (clst < 2 || clst >= fs->n_fatent) /* Chack range */ + return 1; + + switch (fs->fs_type) { + case FS_FAT12 : + bc = (UINT)clst; bc += bc / 2; + if (move_window(fs, fs->fatbase + (bc / SS(fs)))) + break; + wc = fs->win[bc % SS(fs)]; bc++; + if (move_window(fs, fs->fatbase + (bc / SS(fs)))) + break; + wc |= fs->win[bc % SS(fs)] << 8; + return (clst & 1) ? (wc >> 4) : (wc & 0xFFF); + + case FS_FAT16 : + if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)))) + break; + p = &fs->win[clst * 2 % SS(fs)]; + return LD_WORD(p); + + case FS_FAT32 : + if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)))) + break; + p = &fs->win[clst * 4 % SS(fs)]; + return LD_DWORD(p) & 0x0FFFFFFF; + } + + return 0xFFFFFFFF; /* An error occurred at the disk I/O layer */ +} + + + + +/* + * FAT access - Change value of a FAT entry + */ +#ifdef CONFIG_FS_FAT_WRITE + +int put_fat ( + FATFS *fs, /* File system object */ + DWORD clst, /* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */ + DWORD val /* New value to mark the cluster */ +) +{ + UINT bc; + BYTE *p; + int res; + + + if (clst < 2 || clst >= fs->n_fatent) { /* Check range */ + res = -ERESTARTSYS; + + } else { + switch (fs->fs_type) { + case FS_FAT12 : + bc = clst; bc += bc / 2; + res = move_window(fs, fs->fatbase + (bc / SS(fs))); + if (res != 0) + break; + p = &fs->win[bc % SS(fs)]; + *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; + bc++; + fs->wflag = 1; + res = move_window(fs, fs->fatbase + (bc / SS(fs))); + if (res != 0) + break; + p = &fs->win[bc % SS(fs)]; + *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); + break; + + case FS_FAT16 : + res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))); + if (res != 0) + break; + p = &fs->win[clst * 2 % SS(fs)]; + ST_WORD(p, (WORD)val); + break; + + case FS_FAT32 : + res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))); + if (res != 0) + break; + p = &fs->win[clst * 4 % SS(fs)]; + val |= LD_DWORD(p) & 0xF0000000; + ST_DWORD(p, val); + break; + + default : + res = -ERESTARTSYS; + } + fs->wflag = 1; + } + + return res; +} +#endif /* CONFIG_FS_FAT_WRITE */ + + + + +/* + * FAT handling - Remove a cluster chain + */ +#ifdef CONFIG_FS_FAT_WRITE +static +int remove_chain ( + FATFS *fs, /* File system object */ + DWORD clst /* Cluster# to remove a chain from */ +) +{ + int res; + DWORD nxt; +#if _USE_ERASE + DWORD scl = clst, ecl = clst, resion[2]; +#endif + + if (clst < 2 || clst >= fs->n_fatent) { /* Check range */ + res = -ERESTARTSYS; + + } else { + res = 0; + while (clst < fs->n_fatent) { /* Not a last link? */ + nxt = get_fat(fs, clst); /* Get cluster status */ + if (nxt == 0) + break; /* Empty cluster? */ + + if (nxt == 1) { + res = -ERESTARTSYS; + break; /* Internal error? */ + } + + if (nxt == 0xFFFFFFFF) { + res = -EIO; + break; /* Disk error? */ + } + + /* Mark the cluster "empty" */ + res = put_fat(fs, clst, 0); + if (res != 0) + break; + + if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */ + fs->free_clust++; + fs->fsi_flag = 1; + } +#if _USE_ERASE + if (ecl + 1 == nxt) { /* Next cluster is contiguous */ + ecl = nxt; + } else { + /* End of contiguous clusters */ + resion[0] = clust2sect(fs, scl); /* Start sector */ + resion[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */ + disk_ioctl(fs, CTRL_ERASE_SECTOR, resion); /* Erase the block */ + scl = ecl = nxt; + } +#endif + clst = nxt; /* Next cluster */ + } + } + + return res; +} +#endif + + + + +/* + * FAT handling - Stretch or Create a cluster chain + */ +#ifdef CONFIG_FS_FAT_WRITE +static +DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */ + FATFS *fs, /* File system object */ + DWORD clst /* Cluster# to stretch. 0 means create a new chain. */ +) +{ + DWORD cs, ncl, scl; + int res; + + + if (clst == 0) { + /* Create a new chain */ + scl = fs->last_clust; /* Get suggested start point */ + if (!scl || scl >= fs->n_fatent) scl = 1; + } else { + /* Stretch the current chain */ + cs = get_fat(fs, clst); /* Check the cluster status */ + if (cs < 2) + return 1; /* It is an invalid cluster */ + if (cs < fs->n_fatent) + return cs; /* It is already followed by next cluster */ + scl = clst; + } + + ncl = scl; /* Start cluster */ + for (;;) { + ncl++; /* Next cluster */ + if (ncl >= fs->n_fatent) { /* Wrap around */ + ncl = 2; + if (ncl > scl) + return 0; /* No free cluster */ + } + cs = get_fat(fs, ncl); /* Get the cluster status */ + if (cs == 0) + break; /* Found a free cluster */ + if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */ + return cs; + if (ncl == scl) + return 0; /* No free cluster */ + } + + /* Mark the new cluster "last link" */ + res = put_fat(fs, ncl, 0x0FFFFFFF); + if (res == 0 && clst != 0) { + res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */ + } + if (res == 0) { + /* Update FSINFO */ + fs->last_clust = ncl; + if (fs->free_clust != 0xFFFFFFFF) { + fs->free_clust--; + fs->fsi_flag = 1; + } + } else { + ncl = (res == -EIO) ? 0xFFFFFFFF : 1; + } + + return ncl; /* Return new cluster number or error code */ +} +#endif /* CONFIG_FS_FAT_WRITE */ + +/* + * Directory handling - Set directory index + */ +static int dir_sdi ( + FF_DIR *dj, /* Pointer to directory object */ + WORD idx /* Directory index number */ +) +{ + DWORD clst; + WORD ic; + + dj->index = idx; + clst = dj->sclust; + + if (clst == 1 || clst >= dj->fs->n_fatent) /* Check start cluster range */ + return -ERESTARTSYS; + + if (!clst && dj->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */ + clst = dj->fs->dirbase; + + if (clst == 0) { + /* Static table (root-dir in FAT12/16) */ + dj->clust = clst; + + if (idx >= dj->fs->n_rootdir) + /* Index is out of range */ + return -ERESTARTSYS; + + dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */ + } else { + /* Dynamic table (sub-dirs or root-dir in FAT32) */ + ic = SS(dj->fs) / SZ_DIR * dj->fs->csize; /* Entries per cluster */ + while (idx >= ic) { /* Follow cluster chain */ + clst = get_fat(dj->fs, clst); /* Get next cluster */ + if (clst == 0xFFFFFFFF) + return -EIO; /* Disk error */ + if (clst < 2 || clst >= dj->fs->n_fatent) + /* Reached to end of table or int error */ + return -ERESTARTSYS; + idx -= ic; + } + dj->clust = clst; + dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */ + } + + dj->dir = dj->fs->win + (idx % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; /* Ptr to the entry in the sector */ + + return 0; /* Seek succeeded */ +} + + + + +/* + * Directory handling - Move directory index next + */ +static int dir_next ( /* 0:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not stretch */ + FF_DIR *dj, /* Pointer to directory object */ + int stretch /* 0: Do not stretch table, 1: Stretch table if needed */ +) +{ + DWORD clst; + WORD i; + + + i = dj->index + 1; + if (!i || !dj->sect) /* Report EOT when index has reached 65535 */ + return -ENOENT; + + if (!(i % (SS(dj->fs) / SZ_DIR))) { /* Sector changed? */ + dj->sect++; /* Next sector */ + + if (dj->clust == 0) { + /* Static table */ + if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */ + return -ENOENT; + } + else { + /* Dynamic table */ + if (((i / (SS(dj->fs) / SZ_DIR)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */ + clst = get_fat(dj->fs, dj->clust); /* Get next cluster */ + + if (clst <= 1) + return -ERESTARTSYS; + + if (clst == 0xFFFFFFFF) + return -EIO; + + if (clst >= dj->fs->n_fatent) { /* When it reached end of dynamic table */ +#ifdef CONFIG_FS_FAT_WRITE + BYTE c; + + if (!stretch) + return -ENOENT; /* When do not stretch, report EOT */ + + clst = create_chain(dj->fs, dj->clust); /* Stretch cluster chain */ + + if (clst == 0) + return -ENOSPC; /* No free cluster */ + + if (clst == 1) + return -ERESTARTSYS; + + if (clst == 0xFFFFFFFF) + return -EIO; + + /* Clean-up stretched table */ + if (move_window(dj->fs, 0)) + return -EIO; /* Flush active window */ + + memset(dj->fs->win, 0, SS(dj->fs)); /* Clear window buffer */ + dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */ + + for (c = 0; c < dj->fs->csize; c++) { + /* Fill the new cluster with 0 */ + dj->fs->wflag = 1; + if (move_window(dj->fs, 0)) + return -EIO; + dj->fs->winsect++; + } + dj->fs->winsect -= c; /* Rewind window address */ +#else + return -ENOENT; /* Report EOT */ +#endif + } + dj->clust = clst; /* Initialize data for new cluster */ + dj->sect = clust2sect(dj->fs, clst); + } + } + } + + dj->index = i; + dj->dir = dj->fs->win + (i % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; + + return 0; +} + +/* + * LFN handling - Test/Pick/Fit an LFN segment from/to directory entry + */ +#ifdef CONFIG_FS_FAT_LFN + +/* Offset of LFN chars in the directory entry */ +static const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; + +static int cmp_lfn ( /* 1:Matched, 0:Not matched */ + WCHAR *lfnbuf, /* Pointer to the LFN to be compared */ + BYTE *dir /* Pointer to the directory entry containing a part of LFN */ +) +{ + UINT i, s; + WCHAR wc, uc; + + /* Get offset in the LFN buffer */ + i = ((dir[LDIR_Ord] & ~LLE) - 1) * 13; + s = 0; wc = 1; + do { + /* Pick an LFN character from the entry */ + uc = LD_WORD(dir+LfnOfs[s]); + if (wc) { + /* Last char has not been processed */ + wc = ff_wtoupper(uc); + if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */ + return 0; /* Not matched */ + } else { + if (uc != 0xFFFF) return 0; /* Check filler */ + } + } while (++s < 13); /* Repeat until all chars in the entry are checked */ + + if ((dir[LDIR_Ord] & LLE) && wc && lfnbuf[i]) + /* Last segment matched but different length */ + return 0; + + return 1; /* The part of LFN matched */ +} + + + +static +int pick_lfn ( /* 1:Succeeded, 0:Buffer overflow */ + WCHAR *lfnbuf, /* Pointer to the Unicode-LFN buffer */ + BYTE *dir /* Pointer to the directory entry */ +) +{ + UINT i, s; + WCHAR wc, uc; + + i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ + + s = 0; + wc = 1; + do { + /* Pick an LFN character from the entry */ + uc = LD_WORD(dir+LfnOfs[s]); + if (wc) { + /* Last char has not been processed */ + if (i >= _MAX_LFN) + return 0; /* Buffer overflow? */ + lfnbuf[i++] = wc = uc; /* Store it */ + } else { + if (uc != 0xFFFF) + return 0; /* Check filler */ + } + } while (++s < 13); /* Read all character in the entry */ + + if (dir[LDIR_Ord] & LLE) { + /* Put terminator if it is the last LFN part */ + if (i >= _MAX_LFN) + return 0; /* Buffer overflow? */ + lfnbuf[i] = 0; + } + + return 1; +} + + +#ifdef CONFIG_FS_FAT_WRITE +static +void fit_lfn ( + const WCHAR *lfnbuf, /* Pointer to the LFN buffer */ + BYTE *dir, /* Pointer to the directory entry */ + BYTE ord, /* LFN order (1-20) */ + BYTE sum /* SFN sum */ +) +{ + UINT i, s; + WCHAR wc; + + + dir[LDIR_Chksum] = sum; /* Set check sum */ + dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */ + dir[LDIR_Type] = 0; + ST_WORD(dir+LDIR_FstClusLO, 0); + + i = (ord - 1) * 13; /* Get offset in the LFN buffer */ + s = wc = 0; + do { + if (wc != 0xFFFF) + wc = lfnbuf[i++]; /* Get an effective char */ + ST_WORD(dir + LfnOfs[s], wc); /* Put it */ + if (!wc) + wc = 0xFFFF; /* Padding chars following last char */ + } while (++s < 13); + if (wc == 0xFFFF || !lfnbuf[i]) + ord |= LLE; /* Bottom LFN part is the start of LFN sequence */ + dir[LDIR_Ord] = ord; /* Set the LFN order */ +} + +#endif +#endif + + + +/* + * Create numbered name + */ +#ifdef CONFIG_FS_FAT_LFN +void gen_numname ( + BYTE *dst, /* Pointer to generated SFN */ + const BYTE *src, /* Pointer to source SFN to be modified */ + const WCHAR *lfn, /* Pointer to LFN */ + WORD seq /* Sequence number */ +) +{ + BYTE ns[8], c; + UINT i, j; + + + memcpy(dst, src, 11); + + if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */ + do { + seq = (seq >> 1) + (seq << 15) + (WORD) * lfn++; + } while (*lfn); + } + + /* itoa (hexdecimal) */ + i = 7; + do { + c = (seq % 16) + '0'; + if (c > '9') + c += 7; + ns[i--] = c; + seq /= 16; + } while (seq); + + ns[i] = '~'; + + /* Append the number */ + for (j = 0; j < i && dst[j] != ' '; j++) { + if (IsDBCS1(dst[j])) { + if (j == i - 1) + break; + j++; + } + } + + do { + dst[j++] = (i < 8) ? ns[i++] : ' '; + } while (j < 8); +} +#endif + +/* + * Calculate sum of an SFN + */ +#ifdef CONFIG_FS_FAT_LFN +static BYTE sum_sfn ( + const BYTE *dir /* Ptr to directory entry */ +) +{ + BYTE sum = 0; + UINT n = 11; + + do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n); + return sum; +} +#endif + +/* + * Directory handling - Find an object in the directory + */ + +static int dir_find ( + FF_DIR *dj /* Pointer to the directory object linked to the file name */ +) +{ + int res; + BYTE c, *dir; +#ifdef CONFIG_FS_FAT_LFN + BYTE a, ord, sum; +#endif + + res = dir_sdi(dj, 0); /* Rewind directory object */ + if (res != 0) + return res; + +#ifdef CONFIG_FS_FAT_LFN + ord = sum = 0xFF; +#endif + do { + res = move_window(dj->fs, dj->sect); + if (res != 0) + break; + dir = dj->dir; /* Ptr to the directory entry of current index */ + c = dir[DIR_Name]; + if (c == 0) { + /* Reached to end of table */ + res = -ENOENT; + break; + } +#ifdef CONFIG_FS_FAT_LFN /* LFN configuration */ + a = dir[DIR_Attr] & AM_MASK; + if (c == DDE || ((a & AM_VOL) && a != AM_LFN)) { + /* An entry without valid data */ + ord = 0xFF; + } else { + if (a == AM_LFN) { + /* An LFN entry is found */ + if (dj->lfn) { + if (c & LLE) { /* Is it start of LFN sequence? */ + sum = dir[LDIR_Chksum]; + c &= ~LLE; ord = c; /* LFN start order */ + dj->lfn_idx = dj->index; + } + /* Check validity of the LFN entry and compare it with given name */ + ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF; + } + } else { + /* An SFN entry is found */ + if (!ord && sum == sum_sfn(dir)) + break; /* LFN matched? */ + + /* Reset LFN sequence */ + ord = 0xFF; + dj->lfn_idx = 0xFFFF; + if (!(dj->fn[NS] & NS_LOSS) && !memcmp(dir, dj->fn, 11)) + break; /* SFN matched? */ + } + } +#else /* Non LFN configuration */ + if (!(dir[DIR_Attr] & AM_VOL) && !memcmp(dir, dj->fn, 11)) /* Is it a valid entry? */ + break; +#endif + res = dir_next(dj, 0); /* Next entry */ + } while (res == 0); + + return res; +} + + + + +/* + * Read an object from the directory + */ +static int dir_read ( + FF_DIR *dj /* Pointer to the directory object that pointing the entry to be read */ +) +{ + int res; + BYTE c, *dir; +#ifdef CONFIG_FS_FAT_LFN + BYTE a, ord = 0xFF, sum = 0xFF; +#endif + + res = -ENOENT; + while (dj->sect) { + res = move_window(dj->fs, dj->sect); + if (res != 0) + break; + dir = dj->dir; /* Ptr to the directory entry of current index */ + c = dir[DIR_Name]; + if (c == 0) { + /* Reached to end of table */ + res = -ENOENT; + break; + } +#ifdef CONFIG_FS_FAT_LFN /* LFN configuration */ + a = dir[DIR_Attr] & AM_MASK; + if (c == DDE || c == '.' || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ + ord = 0xFF; + } else { + if (a == AM_LFN) { + /* An LFN entry is found */ + if (c & LLE) { /* Is it start of LFN sequence? */ + sum = dir[LDIR_Chksum]; + c &= ~LLE; ord = c; + dj->lfn_idx = dj->index; + } + /* Check LFN validity and capture it */ + ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF; + } else { + /* An SFN entry is found */ + if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */ + dj->lfn_idx = 0xFFFF; /* It has no LFN. */ + break; + } + } +#else /* Non LFN configuration */ + if (c != DDE && c != '.' && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */ + break; +#endif + res = dir_next(dj, 0); /* Next entry */ + if (res != 0) + break; + } + + if (res != 0) + dj->sect = 0; + + return res; +} + +/* + * Register an object to the directory + */ +#ifdef CONFIG_FS_FAT_WRITE +static +int dir_register ( /* 0:Successful, FR_DENIED:No free entry or too many SFN collision, -EIO:Disk error */ + FF_DIR *dj /* Target directory with object name to be created */ +) +{ + int res; + BYTE c, *dir; +#ifdef CONFIG_FS_FAT_LFN /* LFN configuration */ + WORD n, ne, is; + BYTE sn[12], *fn, sum; + WCHAR *lfn; + + + fn = dj->fn; lfn = dj->lfn; + memcpy(sn, fn, 12); + + if (sn[NS] & NS_LOSS) { + /* When LFN is out of 8.3 format, generate a numbered name */ + fn[NS] = 0; dj->lfn = 0; /* Find only SFN */ + for (n = 1; n < 100; n++) { + gen_numname(fn, sn, lfn, n); /* Generate a numbered name */ + res = dir_find(dj); /* Check if the name collides with existing SFN */ + if (res != 0) + break; + } + if (n == 100) + return -ENOSPC; /* Abort if too many collisions */ + if (res != -ENOENT) + return res; /* Abort if the result is other than 'not collided' */ + fn[NS] = sn[NS]; dj->lfn = lfn; + } + + if (sn[NS] & NS_LFN) { + /* When LFN is to be created, reserve an SFN + LFN entries. */ + for (ne = 0; lfn[ne]; ne++); + ne = (ne + 25) / 13; + } else { + /* Otherwise reserve only an SFN entry. */ + ne = 1; + } + + /* Reserve contiguous entries */ + res = dir_sdi(dj, 0); + if (res != 0) + return res; + n = is = 0; + do { + res = move_window(dj->fs, dj->sect); + if (res != 0) + break; + c = *dj->dir; /* Check the entry status */ + if (c == DDE || c == 0) { /* Is it a blank entry? */ + if (n == 0) + is = dj->index; /* First index of the contiguous entry */ + if (++n == ne) + break; /* A contiguous entry that required count is found */ + } else { + n = 0; /* Not a blank entry. Restart to search */ + } + res = dir_next(dj, 1); /* Next entry with table stretch */ + } while (res == 0); + + if (res == 0 && ne > 1) { + /* Initialize LFN entry if needed */ + res = dir_sdi(dj, is); + if (res == 0) { + sum = sum_sfn(dj->fn); /* Sum of the SFN tied to the LFN */ + ne--; + do { + /* Store LFN entries in bottom first */ + res = move_window(dj->fs, dj->sect); + if (res != 0) + break; + fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum); + dj->fs->wflag = 1; + res = dir_next(dj, 0); /* Next entry */ + } while (res == 0 && --ne); + } + } + +#else /* Non LFN configuration */ + res = dir_sdi(dj, 0); + if (res == 0) { + do { /* Find a blank entry for the SFN */ + res = move_window(dj->fs, dj->sect); + if (res != 0) + break; + c = *dj->dir; + if (c == DDE || c == 0) + break; /* Is it a blank entry? */ + res = dir_next(dj, 1); /* Next entry with table stretch */ + } while (res == 0); + } +#endif + + if (res == 0) { /* Initialize the SFN entry */ + res = move_window(dj->fs, dj->sect); + if (res == 0) { + dir = dj->dir; + memset(dir, 0, SZ_DIR); /* Clean the entry */ + memcpy(dir, dj->fn, 11); /* Put SFN */ +#ifdef CONFIG_FS_FAT_LFN + dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT); /* Put NT flag */ +#endif + dj->fs->wflag = 1; + } + } + + return res; +} +#endif /* CONFIG_FS_FAT_WRITE */ + +/* + * Remove an object from the directory + */ +#if defined CONFIG_FS_FAT_WRITE +static int dir_remove ( /* 0: Successful, -EIO: A disk error */ + FF_DIR *dj /* Directory object pointing the entry to be removed */ +) +{ + int res; +#ifdef CONFIG_FS_FAT_LFN /* LFN configuration */ + WORD i; + + i = dj->index; /* SFN index */ + /* Goto the SFN or top of the LFN entries */ + res = dir_sdi(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx)); + if (res == 0) { + do { + res = move_window(dj->fs, dj->sect); + if (res != 0) + break; + *dj->dir = DDE; /* Mark the entry "deleted" */ + dj->fs->wflag = 1; + if (dj->index >= i) + break; /* When reached SFN, all entries of the object has been deleted. */ + res = dir_next(dj, 0); /* Next entry */ + } while (res == 0); + if (res == -ENOENT) + res = -ERESTARTSYS; + } + +#else /* Non LFN configuration */ + res = dir_sdi(dj, dj->index); + if (res == 0) { + res = move_window(dj->fs, dj->sect); + if (res == 0) { + *dj->dir = DDE; /* Mark the entry "deleted" */ + dj->fs->wflag = 1; + } + } +#endif + + return res; +} +#endif /* CONFIG_FS_FAT_WRITE */ + +/* + * Pick a segment and create the object name in directory form + */ +static int create_name ( + FF_DIR *dj, /* Pointer to the directory object */ + const TCHAR **path /* Pointer to pointer to the segment in the path string */ +) +{ +#ifdef _EXCVT + static const BYTE excvt[] = _EXCVT; /* Upper conversion table for extended chars */ +#endif + +#ifdef CONFIG_FS_FAT_LFN /* LFN configuration */ + BYTE b, cf; + WCHAR w, *lfn; + UINT i, ni, si, di; + const TCHAR *p; + + /* Create LFN in Unicode */ + for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */ + lfn = dj->lfn; + si = di = 0; + for (;;) { + w = p[si++]; /* Get a character */ + if (w < ' ' || w == '/' || w == '\\') + break; /* Break on end of segment */ + if (di >= _MAX_LFN) /* Reject too long name */ + return -ENAMETOOLONG; +#if !_LFN_UNICODE + w &= 0xFF; + if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ + b = (BYTE)p[si++]; /* Get 2nd byte */ + if (!IsDBCS2(b)) + return -ENAMETOOLONG; /* Reject invalid sequence */ + w = (w << 8) + b; /* Create a DBC */ + } + w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */ + if (!w) return -ENAMETOOLONG; /* Reject invalid code */ +#endif + if (w < 0x80 && strchr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */ + return -ENAMETOOLONG; + lfn[di++] = w; /* Store the Unicode char */ + } + *path = &p[si]; /* Return pointer to the next segment */ + cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ + while (di) { /* Strip trailing spaces and dots */ + w = lfn[di-1]; + if (w != ' ' && w != '.') + break; + di--; + } + if (!di) return -EINVAL; /* Reject nul string */ + + lfn[di] = 0; /* LFN is created */ + + /* Create SFN in directory form */ + memset(dj->fn, ' ', 11); + for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */ + if (si) cf |= NS_LOSS | NS_LFN; + while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */ + + b = i = 0; ni = 8; + for (;;) { + w = lfn[si++]; /* Get an LFN char */ + if (!w) + break; /* Break on end of the LFN */ + if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */ + cf |= NS_LOSS | NS_LFN; + continue; + } + + if (i >= ni || si == di) { /* Extension or end of SFN */ + if (ni == 11) { /* Long extension */ + cf |= NS_LOSS | NS_LFN; + break; + } + if (si != di) + cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */ + if (si > di) + break; /* No extension */ + si = di; i = 8; ni = 11;/* Enter extension section */ + b <<= 2; + continue; + } + + if (w >= 0x80) { /* Non ASCII char */ +#ifdef _EXCVT + w = ff_convert(w, 0); /* Unicode -> OEM code */ + if (w) + w = excvt[w - 0x80]; /* Convert extended char to upper (SBCS) */ +#else + w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */ +#endif + cf |= NS_LFN; /* Force create LFN entry */ + } + + if (_DF1S && w >= 0x100) { /* Double byte char (always false on SBCS cfg) */ + if (i >= ni - 1) { + cf |= NS_LOSS | NS_LFN; i = ni; + continue; + } + dj->fn[i++] = (BYTE)(w >> 8); + } else { /* Single byte char */ + if (!w || strchr("+,;=[]", w)) { /* Replace illegal chars for SFN */ + w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */ + } else { + if (isupper(w)) { + b |= 2; + } else { + if (islower(w)) { + b |= 1; w -= 0x20; + } + } + } + } + dj->fn[i++] = (BYTE)w; + } + + if (dj->fn[0] == DDE) + dj->fn[0] = NDDE; /* If the first char collides with deleted mark, replace it with 0x05 */ + + if (ni == 8) b <<= 2; + if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */ + cf |= NS_LFN; + if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended char, NT flags are created */ + if ((b & 0x03) == 0x01) + cf |= NS_EXT; /* NT flag (Extension has only small capital) */ + if ((b & 0x0C) == 0x04) + cf |= NS_BODY; /* NT flag (Filename has only small capital) */ + } + + dj->fn[NS] = cf; /* SFN is created */ + + return 0; + +#else /* Non-LFN configuration */ + BYTE b, c, d, *sfn; + UINT ni, si, i; + const char *p; + + /* Create file name in directory form */ + for (p = *path; *p == '/' || *p == '\\'; p++); /* Strip duplicated separator */ + sfn = dj->fn; + memset(sfn, ' ', 11); + si = i = b = 0; ni = 8; + for (;;) { + c = (BYTE)p[si++]; + if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */ + if (c == '.' || i >= ni) { + if (ni != 8 || c != '.') + return -EINVAL; + i = 8; ni = 11; + b <<= 2; continue; + } + if (c >= 0x80) { /* Extended char? */ + b |= 3; /* Eliminate NT flag */ +#ifdef _EXCVT + c = excvt[c-0x80]; /* Upper conversion (SBCS) */ +#else +#if !_DF1S /* ASCII only cfg */ + return -EINVAL; +#endif +#endif + } + if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ + d = (BYTE)p[si++]; /* Get 2nd byte */ + if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */ + return -EINVAL; + sfn[i++] = c; + sfn[i++] = d; + } else { /* Single byte code */ + if (strchr("\"*+,:;<=>\?[]|\x7F", c)) /* Reject illegal chrs for SFN */ + return -EINVAL; + if (isupper(c)) { + b |= 2; + } else { + if (islower(c)) { + b |= 1; c -= 0x20; + } + } + sfn[i++] = c; + } + } + *path = &p[si]; /* Return pointer to the next segment */ + c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ + + if (!i) + return -EINVAL; /* Reject nul string */ + if (sfn[0] == DDE) + sfn[0] = NDDE; /* When first char collides with DDE, replace it with 0x05 */ + + if (ni == 8) + b <<= 2; + if ((b & 0x03) == 0x01) + c |= NS_EXT; /* NT flag (Name extension has only small capital) */ + if ((b & 0x0C) == 0x04) + c |= NS_BODY; /* NT flag (Name body has only small capital) */ + + sfn[NS] = c; /* Store NT flag, File name is created */ + + return 0; +#endif +} + +/* + * Get file information from directory entry + */ +static void get_fileinfo ( /* No return code */ + FF_DIR *dj, /* Pointer to the directory object */ + FILINFO *fno /* Pointer to the file information to be filled */ +) +{ + UINT i; + BYTE nt, *dir; + TCHAR *p, c; + + + p = fno->fname; + if (dj->sect) { + dir = dj->dir; + nt = dir[DIR_NTres]; /* NT flag */ + for (i = 0; i < 8; i++) { /* Copy name body */ + c = dir[i]; + if (c == ' ') + break; + if (c == NDDE) + c = (TCHAR)DDE; +#ifdef CONFIG_FS_FAT_LFN + if ((nt & NS_BODY) && isupper(c)) + c += 0x20; +#endif +#if _LFN_UNICODE + if (IsDBCS1(c) && i < 7 && IsDBCS2(dir[i+1])) + c = (c << 8) | dir[++i]; + c = ff_convert(c, 1); + if (!c) c = '?'; +#endif + *p++ = c; + } + if (dir[8] != ' ') { /* Copy name extension */ + *p++ = '.'; + for (i = 8; i < 11; i++) { + c = dir[i]; + if (c == ' ') + break; +#ifdef CONFIG_FS_FAT_LFN + if ((nt & NS_EXT) && isupper(c)) + c += 0x20; +#endif +#if _LFN_UNICODE + if (IsDBCS1(c) && i < 10 && IsDBCS2(dir[i+1])) + c = (c << 8) | dir[++i]; + c = ff_convert(c, 1); + if (!c) + c = '?'; +#endif + *p++ = c; + } + } + fno->fattrib = dir[DIR_Attr]; /* Attribute */ + fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */ + fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */ + fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */ + } + *p = 0; /* Terminate SFN str by a \0 */ + +#ifdef CONFIG_FS_FAT_LFN + if (fno->lfname && fno->lfsize) { + TCHAR *tp = fno->lfname; + WCHAR w, *lfn; + + i = 0; + if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */ + lfn = dj->lfn; + while ((w = *lfn++) != 0) { /* Get an LFN char */ +#if !_LFN_UNICODE + w = ff_convert(w, 0); /* Unicode -> OEM conversion */ + if (!w) { + /* Could not convert, no LFN */ + i = 0; + break; + } + /* Put 1st byte if it is a DBC (always false on SBCS cfg) */ + if (_DF1S && w >= 0x100) + tp[i++] = (TCHAR)(w >> 8); +#endif + if (i >= fno->lfsize - 1) { i = 0; break; } /* Buffer overflow, no LFN */ + tp[i++] = (TCHAR)w; + } + } + tp[i] = 0; /* Terminate the LFN str by a \0 */ + } +#endif +} + +/* + * Follow a file path + */ +static +int follow_path ( /* 0(0): successful, !=0: error code */ + FF_DIR *dj, /* Directory object to return last directory and found object */ + const TCHAR *path /* Full-path string to find a file or directory */ +) +{ + int res; + BYTE *dir, ns; + + if (*path == '/' || *path == '\\') /* Strip heading separator if exist */ + path++; + dj->sclust = 0; /* Start from the root dir */ + + if ((UINT)*path < ' ') { + /* Nul path means the start directory itself */ + res = dir_sdi(dj, 0); + dj->dir = 0; + return res; + } + + /* Follow path */ + for (;;) { + res = create_name(dj, &path); /* Get a segment */ + if (res != 0) + break; + res = dir_find(dj); /* Find it */ + ns = *(dj->fn+NS); + if (res != 0) { /* Failed to find the object */ + if (res != -ENOENT) + break; /* Abort if any hard error occured */ + /* Object not found */ + if (!(ns & NS_LAST)) + res = -ENOENT; + break; + } + if (ns & NS_LAST) + break; /* Last segment match. Function completed. */ + dir = dj->dir; /* There is next segment. Follow the sub directory */ + if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */ + res = -ENOTDIR; + break; + } + dj->sclust = LD_CLUST(dir); + } + + return res; +} + +/* + * Load boot record and check if it is an FAT boot record + */ +static int check_fs ( /* 0:The FAT BR, 1:Valid BR but not an FAT, 2:Not a BR, 3:Disk error */ + FATFS *fs, /* File system object */ + DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */ +) +{ + int ret; + + /* Load boot record */ + ret = disk_read(fs, fs->win, sect, 1); + if (ret) + return ret; + /* Check record signature (always placed at offset 510 even if the sector size is>512) */ + if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) + return -ENODEV; + + /* Check "FAT" string */ + if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) + return 0; + + if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146) + return 0; + + return -ENODEV; +} + +/* + * Check if the file system object is valid or not + */ +static int chk_mounted ( /* 0(0): successful, !=0: any error occurred */ + FATFS *fs, /* Pointer to pointer to the found file system object */ + BYTE chk_wp /* !=0: Check media write protection for write access */ +) +{ + BYTE fmt, b; + DWORD bsect, fasize, tsect, sysect, nclst, szbfat; + WORD nrsv; + + INIT_LIST_HEAD(&fs->dirtylist); + + /* The logical drive must be mounted. */ + /* Following code attempts to mount a volume. (analyze BPB and initialize the fs object) */ + + fs->fs_type = 0; /* Clear the file system object */ +#if _MAX_SS != 512 /* Get disk sector size (variable sector size cfg only) */ + if (disk_ioctl(fs, GET_SECTOR_SIZE, &fs->ssize) != RES_OK) + return -EIO; +#endif + /* Search FAT partition on the drive. Supports only generic partitionings, FDISK and SFD. */ + fmt = check_fs(fs, bsect = 0); /* Check sector 0 if it is a VBR */ + if (fmt) + return fmt; /* No FAT volume is found */ + + /* Following code initializes the file system object */ + + /* (BPB_BytsPerSec must be equal to the physical sector size) */ + if (LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs)) + return -EINVAL; + + /* Number of sectors per FAT */ + fasize = LD_WORD(fs->win+BPB_FATSz16); + if (!fasize) + fasize = LD_DWORD(fs->win+BPB_FATSz32); + fs->fsize = fasize; + + /* Number of FAT copies */ + fs->n_fats = b = fs->win[BPB_NumFATs]; + if (b != 1 && b != 2) + return -EINVAL; /* (Must be 1 or 2) */ + + /* Number of sectors for FAT area */ + fasize *= b; + + /* Number of sectors per cluster */ + fs->csize = b = fs->win[BPB_SecPerClus]; + if (!b || (b & (b - 1))) + return -EINVAL; /* (Must be power of 2) */ + + /* Number of root directory entries */ + fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt); + if (fs->n_rootdir % (SS(fs) / SZ_DIR)) + return -EINVAL; /* (BPB_RootEntCnt must be sector aligned) */ + + /* Number of sectors on the volume */ + tsect = LD_WORD(fs->win+BPB_TotSec16); + if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32); + + /* Number of reserved sectors */ + nrsv = LD_WORD(fs->win+BPB_RsvdSecCnt); + if (!nrsv) + return -EINVAL; /* (BPB_RsvdSecCnt must not be 0) */ + + /* Determine the FAT sub type */ + /* RSV+FAT+FF_DIR */ + sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIR); + if (tsect < sysect) + return -EINVAL; /* (Invalid volume size) */ + + /* Number of clusters */ + nclst = (tsect - sysect) / fs->csize; + if (!nclst) + return -EINVAL; /* (Invalid volume size) */ + fmt = FS_FAT12; + if (nclst >= MIN_FAT16) + fmt = FS_FAT16; + if (nclst >= MIN_FAT32) + fmt = FS_FAT32; + + /* Boundaries and Limits */ + /* Number of FAT entries */ + fs->n_fatent = nclst + 2; + /* Data start sector */ + fs->database = bsect + sysect; + /* FAT start sector */ + fs->fatbase = bsect + nrsv; + if (fmt == FS_FAT32) { + if (fs->n_rootdir) + return -EINVAL; /* (BPB_RootEntCnt must be 0) */ + /* Root directory start cluster */ + fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); + /* (Required FAT size) */ + szbfat = fs->n_fatent * 4; + } else { + if (!fs->n_rootdir) + return -EINVAL;/* (BPB_RootEntCnt must not be 0) */ + /* Root directory start sector */ + fs->dirbase = fs->fatbase + fasize; + /* (Required FAT size) */ + szbfat = (fmt == FS_FAT16) ? + fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1); + } + /* (BPB_FATSz must not be less than required) */ + if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) + return -EINVAL; + +#ifdef CONFIG_FS_FAT_WRITE + /* Initialize cluster allocation information */ + fs->free_clust = 0xFFFFFFFF; + fs->last_clust = 0; + + /* Get fsinfo if available */ + if (fmt == FS_FAT32) { + fs->fsi_flag = 0; + fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo); + if (disk_read(fs, fs->win, fs->fsi_sector, 1) == RES_OK && + LD_WORD(fs->win+BS_55AA) == 0xAA55 && + LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 && + LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) { + fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free); + fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count); + } + } +#endif + fs->fs_type = fmt; /* FAT sub-type */ + fs->winsect = 0; /* Invalidate sector cache */ + fs->wflag = 0; + + return 0; +} + +/* + * Mount/Unmount a Logical Drive + */ +int f_mount ( + FATFS *fs /* Pointer to new file system object (NULL for unmount)*/ +) +{ + fs->fs_type = 0; /* Clear new fs object */ + + chk_mounted(fs, 0); + + return 0; +} + +/* + * Open or Create a File + */ +int f_open ( + FATFS *fatfs, + FIL *fp, /* Pointer to the blank file object */ + const TCHAR *path, /* Pointer to the file name */ + BYTE mode /* Access mode and file open mode flags */ +) +{ + int res = 0; + FF_DIR dj; + BYTE *dir; + DEF_NAMEBUF; + + + fp->fs = 0; /* Clear file object */ + +#ifdef CONFIG_FS_FAT_WRITE + mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW; + dj.fs = fatfs; +#else + mode &= FA_READ; + dj.fs = fatfs; +#endif + INIT_BUF(dj); + if (res == 0) + res = follow_path(&dj, path); /* Follow the file path */ + dir = dj.dir; + +#ifdef CONFIG_FS_FAT_WRITE /* R/W configuration */ + if (res == 0) { + if (!dir) /* Current dir itself */ + res = -EISDIR; + } + /* Create or Open a file */ + if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) { + DWORD dw, cl; + + if (res != 0) { /* No file, create new */ + if (res == -ENOENT) /* There is no file to open, create a new entry */ + res = dir_register(&dj); + mode |= FA_CREATE_ALWAYS; /* File is created */ + dir = dj.dir; /* New entry */ + } else { /* Any object is already existing */ + if (dir[DIR_Attr] & AM_RDO) { + res = -EROFS; + } else if (dir[DIR_Attr] & AM_DIR) { /* Cannot overwrite it (R/O or FF_DIR) */ + res = -EISDIR; + } else { + if (mode & FA_CREATE_NEW) /* Cannot create as new file */ + res = -EEXIST; + } + } + if (res == 0 && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */ + dw = get_fattime(); /* Created time */ + ST_DWORD(dir+DIR_CrtTime, dw); + dir[DIR_Attr] = 0; /* Reset attribute */ + ST_DWORD(dir+DIR_FileSize, 0); /* size = 0 */ + cl = LD_CLUST(dir); /* Get start cluster */ + ST_CLUST(dir, 0); /* cluster = 0 */ + dj.fs->wflag = 1; + if (cl) { /* Remove the cluster chain if exist */ + dw = dj.fs->winsect; + res = remove_chain(dj.fs, cl); + if (res == 0) { + dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */ + res = move_window(dj.fs, dw); + } + } + } + } else { /* Open an existing file */ + if (res == 0) { /* Follow succeeded */ + if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */ + res = -EISDIR; + } else { + if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */ + res = -EROFS; + } + } + } + if (res == 0) { + if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */ + mode |= FA__WRITTEN; + fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */ + fp->dir_ptr = dir; + } + +#else /* R/O configuration */ + if (res == 0) { /* Follow succeeded */ + if (!dir) { /* Current dir itself */ + res = -EISDIR; + } else { + if (dir[DIR_Attr] & AM_DIR) /* It is a directory */ + res = -EISDIR; + } + } +#endif + FREE_BUF(); + + if (res == 0) { + fp->flag = mode; /* File access mode */ + fp->sclust = LD_CLUST(dir); /* File start cluster */ + fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */ + fp->fptr = 0; /* File pointer */ + fp->dsect = 0; + fp->fs = dj.fs; + } + + return res; +} + + + + +/* + * Read File + */ +int f_read ( + FIL *fp, /* Pointer to the file object */ + void *buff, /* Pointer to data buffer */ + UINT btr, /* Number of bytes to read */ + UINT *br /* Pointer to number of bytes read */ +) +{ + DWORD clst, sect, remain; + UINT rcnt, cc; + BYTE csect, *rbuff = buff; + + *br = 0; /* Initialize byte counter */ + + if (fp->flag & FA__ERROR) /* Aborted file? */ + return -ERESTARTSYS; + if (!(fp->flag & FA_READ)) /* Check access mode */ + return -EROFS; + remain = fp->fsize - fp->fptr; + if (btr > remain) + btr = (UINT)remain; /* Truncate btr by remaining bytes */ + + /* Repeat until all data read */ + for ( ; btr; rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) { + if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ + csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ + if (!csect) { /* On the cluster boundary? */ + if (fp->fptr == 0) { /* On the top of the file? */ + clst = fp->sclust; /* Follow from the origin */ + } else { /* Middle or end of the file */ + clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */ + } + if (clst < 2) + ABORT(fp->fs, -ERESTARTSYS); + if (clst == 0xFFFFFFFF) + ABORT(fp->fs, -EIO); + fp->clust = clst; /* Update current cluster */ + } + sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ + if (!sect) + ABORT(fp->fs, -ERESTARTSYS); + sect += csect; + cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */ + if (cc) { /* Read maximum contiguous sectors directly */ + if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ + cc = fp->fs->csize - csect; + if (disk_read(fp->fs, rbuff, sect, (BYTE)cc) != RES_OK) + ABORT(fp->fs, -EIO); +#if defined CONFIG_FS_FAT_WRITE + /* Replace one of the read sectors with cached data if it contains a dirty sector */ + if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc) + memcpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs)); +#endif + rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ + continue; + } + if (fp->dsect != sect) { /* Load data sector if not in cache */ +#ifdef CONFIG_FS_FAT_WRITE + if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ + if (disk_write(fp->fs, fp->buf, fp->dsect, 1) != RES_OK) + ABORT(fp->fs, -EIO); + fp->flag &= ~FA__DIRTY; + } +#endif + if (disk_read(fp->fs, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */ + ABORT(fp->fs, -EIO); + } + fp->dsect = sect; + } + rcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */ + if (rcnt > btr) + rcnt = btr; + memcpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ + } + + return 0; +} + + + + +#ifdef CONFIG_FS_FAT_WRITE +/* + * Write File + */ +int f_write ( + FIL *fp, /* Pointer to the file object */ + const void *buff, /* Pointer to the data to be written */ + UINT btw, /* Number of bytes to write */ + UINT *bw /* Pointer to number of bytes written */ +) +{ + DWORD clst, sect; + UINT wcnt, cc; + const BYTE *wbuff = buff; + BYTE csect; + + *bw = 0; /* Initialize byte counter */ + + if (fp->flag & FA__ERROR) /* Aborted file? */ + return -ERESTARTSYS; + if (!(fp->flag & FA_WRITE)) /* Check access mode */ + return -EROFS; + if ((DWORD)(fp->fsize + btw) < fp->fsize) + btw = 0; /* File size cannot reach 4GB */ + + /* Repeat until all data written */ + for ( ; btw; wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) { + /* On the sector boundary? */ + if ((fp->fptr % SS(fp->fs)) == 0) { + /* Sector offset in the cluster */ + csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); + /* On the cluster boundary? */ + if (!csect) { + /* On the top of the file? */ + if (fp->fptr == 0) { + clst = fp->sclust; /* Follow from the origin */ + if (clst == 0) /* When no cluster is allocated, */ + /* Create a new cluster chain */ + fp->sclust = clst = create_chain(fp->fs, 0); + } else { + /* Middle or end of the file */ + /* Follow or stretch cluster chain on the FAT */ + clst = create_chain(fp->fs, fp->clust); + } + if (clst == 0) + break; /* Could not allocate a new cluster (disk full) */ + if (clst == 1) + ABORT(fp->fs, -ERESTARTSYS); + if (clst == 0xFFFFFFFF) + ABORT(fp->fs, -EIO); + fp->clust = clst; /* Update current cluster */ + } + if (fp->flag & FA__DIRTY) { /* Write-back sector cache */ + printf("wr sector cache\n"); + if (disk_write(fp->fs, fp->buf, fp->dsect, 1) != RES_OK) + ABORT(fp->fs, -EIO); + fp->flag &= ~FA__DIRTY; + } + sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ + if (!sect) + ABORT(fp->fs, -ERESTARTSYS); + sect += csect; + cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */ + if (cc) { + /* Write maximum contiguous sectors directly */ + if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ + cc = fp->fs->csize - csect; + if (disk_write(fp->fs, wbuff, sect, (BYTE)cc) != RES_OK) + ABORT(fp->fs, -EIO); + if (fp->dsect - sect < cc) { + /* Refill sector cache if it gets invalidated by the direct write */ + memcpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs)); + fp->flag &= ~FA__DIRTY; + } + wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ + continue; + } + if (fp->dsect != sect) { + /* Fill sector cache with file data */ + if (fp->fptr < fp->fsize && + disk_read(fp->fs, fp->buf, sect, 1) != RES_OK) + ABORT(fp->fs, -EIO); + } + + fp->dsect = sect; + } + /* Put partial sector into file I/O buffer */ + wcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); + if (wcnt > btw) + wcnt = btw; + memcpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ + fp->flag |= FA__DIRTY; + } + + if (fp->fptr > fp->fsize) + fp->fsize = fp->fptr; /* Update file size if needed */ + + fp->flag |= FA__WRITTEN; /* Set file change flag */ + + return 0; +} + +/* + * Synchronize the File Object + */ +int f_sync ( + FIL *fp /* Pointer to the file object */ +) +{ + int res; + DWORD tim; + BYTE *dir; + + /* Has the file been written? */ + if (!(fp->flag & FA__WRITTEN)) + return 0; + + if (fp->flag & FA__DIRTY) { + if (disk_write(fp->fs, fp->buf, fp->dsect, 1) != RES_OK) + return -EIO; + fp->flag &= ~FA__DIRTY; + } + + /* Update the directory entry */ + res = move_window(fp->fs, fp->dir_sect); + if (res) + return res; + + dir = fp->dir_ptr; + dir[DIR_Attr] |= AM_ARC; /* Set archive bit */ + ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */ + ST_CLUST(dir, fp->sclust); /* Update start cluster */ + tim = get_fattime(); /* Update updated time */ + ST_DWORD(dir+DIR_WrtTime, tim); + fp->flag &= ~FA__WRITTEN; + fp->fs->wflag = 1; + res = sync(fp->fs); + + flush_dirty_fat(fp->fs); + + return res; +} + +#endif /* CONFIG_FS_FAT_WRITE */ + +/* + * Close File + */ +int f_close ( + FIL *fp /* Pointer to the file object to be closed */ +) +{ +#ifndef CONFIG_FS_FAT_WRITE + fp->fs = 0; /* Discard file object */ + return 0; +#else + int res; + + /* Flush cached data */ + res = f_sync(fp); + if (res == 0) + fp->fs = 0; /* Discard file object */ + return res; +#endif +} + +/* + * Seek File R/W Pointer + */ +int f_lseek ( + FIL *fp, /* Pointer to the file object */ + DWORD ofs /* File pointer from top of file */ +) +{ + DWORD clst, bcs, nsect, ifptr; + int res = 0; + + if (fp->flag & FA__ERROR) /* Check abort flag */ + return -ERESTARTSYS; + + if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */ +#ifdef CONFIG_FS_FAT_WRITE + && !(fp->flag & FA_WRITE) +#endif + ) ofs = fp->fsize; + + ifptr = fp->fptr; + fp->fptr = nsect = 0; + if (ofs) { + bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */ + if (ifptr > 0 && + (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ + fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */ + ofs -= fp->fptr; + clst = fp->clust; + } else { /* When seek to back cluster, */ + clst = fp->sclust; /* start from the first cluster */ +#ifdef CONFIG_FS_FAT_WRITE + if (clst == 0) { /* If no cluster chain, create a new chain */ + clst = create_chain(fp->fs, 0); + if (clst == 1) + ABORT(fp->fs, -ERESTARTSYS); + if (clst == 0xFFFFFFFF) + ABORT(fp->fs, -EIO); + fp->sclust = clst; + } +#endif + fp->clust = clst; + } + if (clst != 0) { + while (ofs > bcs) { /* Cluster following loop */ +#ifdef CONFIG_FS_FAT_WRITE + if (fp->flag & FA_WRITE) { /* Check if in write mode or not */ + /* Force stretch if in write mode */ + clst = create_chain(fp->fs, clst); + /* When disk gets full, clip file size */ + if (clst == 0) { + ofs = bcs; + break; + } + } else +#endif + /* Follow cluster chain if not in write mode */ + clst = get_fat(fp->fs, clst); + if (clst == 0xFFFFFFFF) + ABORT(fp->fs, -EIO); + if (clst <= 1 || clst >= fp->fs->n_fatent) + ABORT(fp->fs, -ERESTARTSYS); + fp->clust = clst; + fp->fptr += bcs; + ofs -= bcs; + } + fp->fptr += ofs; + if (ofs % SS(fp->fs)) { + nsect = clust2sect(fp->fs, clst); /* Current sector */ + if (!nsect) + ABORT(fp->fs, -ERESTARTSYS); + nsect += ofs / SS(fp->fs); + } + } + } + if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */ +#ifdef CONFIG_FS_FAT_WRITE + if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ + if (disk_write(fp->fs, fp->buf, fp->dsect, 1) != RES_OK) + ABORT(fp->fs, -EIO); + fp->flag &= ~FA__DIRTY; + } +#endif + if (disk_read(fp->fs, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */ + ABORT(fp->fs, -EIO); + fp->dsect = nsect; + } +#ifdef CONFIG_FS_FAT_WRITE + if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */ + fp->fsize = fp->fptr; + fp->flag |= FA__WRITTEN; + } +#endif + + return res; +} + +/* + * Create a Directroy Object + */ +int f_opendir ( + FATFS *fatfs, + FF_DIR *dj, /* Pointer to directory object to create */ + const TCHAR *path /* Pointer to the directory path */ +) +{ + int res; + DEF_NAMEBUF; + + dj->fs = fatfs; + + INIT_BUF(*dj); + res = follow_path(dj, path); /* Follow the path to the directory */ + FREE_BUF(); + + if (res) + return res; + + if (dj->dir) { + /* It is not the root dir */ + if (dj->dir[DIR_Attr] & AM_DIR) { + /* The object is a directory */ + dj->sclust = LD_CLUST(dj->dir); + } else { + /* The object is not a directory */ + return -ENOTDIR; + } + } + + res = dir_sdi(dj, 0); /* Rewind dir */ + + return res; +} + + + + +/* + * Read Directory Entry in Sequense + */ +int f_readdir ( + FF_DIR *dj, /* Pointer to the open directory object */ + FILINFO *fno /* Pointer to file information to return */ +) +{ + int res; + DEF_NAMEBUF; + + if (!fno) { + res = dir_sdi(dj, 0); /* Rewind the directory object */ + return res; + } + + INIT_BUF(*dj); + res = dir_read(dj); /* Read an directory item */ + if (res == -ENOENT) { /* Reached end of dir */ + dj->sect = 0; + res = 0; + goto out; + } + + /* A valid entry is found */ + get_fileinfo(dj, fno); /* Get the object information */ + res = dir_next(dj, 0); /* Increment index for next */ + if (res == -ENOENT) { + dj->sect = 0; + res = 0; + } +out: + FREE_BUF(); + + return res; +} + +/* + * Get File Status + */ +int f_stat ( + FATFS *fatfs, + const TCHAR *path, /* Pointer to the file path */ + FILINFO *fno /* Pointer to file information to return */ +) +{ + int res; + FF_DIR dj; + DEF_NAMEBUF; + + dj.fs = fatfs; + + INIT_BUF(dj); + res = follow_path(&dj, path); /* Follow the file path */ + if (res == 0) { /* Follow completed */ + if (dj.dir) /* Found an object */ + get_fileinfo(&dj, fno); + else /* It is root dir */ + res = -ENOENT; + } + FREE_BUF(); + + return res; +} + +#ifdef CONFIG_FS_FAT_WRITE +/* + * Get Number of Free Clusters + */ +int f_getfree ( + FATFS *fatfs, + const TCHAR *path, /* Pointer to the logical drive number (root dir) */ + DWORD *nclst /* Pointer to the variable to return number of free clusters */ +) +{ + int res = 0; + DWORD n, clst, sect, stat; + UINT i; + BYTE fat, *p; + + + /* If free_clust is valid, return it without full cluster scan */ + if (fatfs->free_clust <= fatfs->n_fatent - 2) { + *nclst = fatfs->free_clust; + return 0; + } + + /* Get number of free clusters */ + fat = fatfs->fs_type; + n = 0; + if (fat == FS_FAT12) { + clst = 2; + do { + stat = get_fat(fatfs, clst); + if (stat == 0xFFFFFFFF) { + res = -EIO; + break; + } + if (stat == 1) { + res = -ERESTARTSYS; + break; + } + if (stat == 0) n++; + } while (++clst < fatfs->n_fatent); + } else { + clst = fatfs->n_fatent; + sect = fatfs->fatbase; + i = 0; p = 0; + do { + if (!i) { + res = move_window(fatfs, sect++); + if (res != 0) break; + p = fatfs->win; + i = SS(fatfs); + } + if (fat == FS_FAT16) { + if (LD_WORD(p) == 0) n++; + p += 2; i -= 2; + } else { + if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++; + p += 4; i -= 4; + } + } while (--clst); + } + fatfs->free_clust = n; + if (fat == FS_FAT32) + fatfs->fsi_flag = 1; + *nclst = n; + + return res; +} + +/* + * Truncate File + */ +int f_truncate ( + FIL *fp /* Pointer to the file object */ +) +{ + int res = 0; + DWORD ncl; + + if (fp->flag & FA__ERROR) { /* Check abort flag */ + return -ERESTARTSYS; + } else { + if (!(fp->flag & FA_WRITE)) /* Check access mode */ + return -EROFS; + } + + if (fp->fsize <= fp->fptr) + return 0; + + fp->fsize = fp->fptr; /* Set file size to current R/W point */ + fp->flag |= FA__WRITTEN; + if (fp->fptr == 0) { + /* When set file size to zero, remove entire cluster chain */ + res = remove_chain(fp->fs, fp->sclust); + fp->sclust = 0; + } else { + /* When truncate a part of the file, remove remaining clusters */ + ncl = get_fat(fp->fs, fp->clust); + if (ncl == 0xFFFFFFFF) + return -EIO; + if (ncl == 1) + return -ERESTARTSYS; + if (ncl < fp->fs->n_fatent) { + res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF); + if (res) + return res; + res = remove_chain(fp->fs, ncl); + } + } + + return res; +} + +/* + * Delete a File or Directory + */ +int f_unlink ( + FATFS *fatfs, + const TCHAR *path /* Pointer to the file or directory path */ +) +{ + int res; + FF_DIR dj, sdj; + BYTE *dir; + DWORD dclst; + DEF_NAMEBUF; + + dj.fs = fatfs; + + INIT_BUF(dj); + res = follow_path(&dj, path); /* Follow the file path */ + if (res) + goto out; + + if (dj.fn[NS] & NS_DOT) { + res = -EINVAL; /* Cannot remove dot entry */ + goto out; + } + + /* The object is accessible */ + dir = dj.dir; + if (!dir) { + res = -EINVAL; /* Cannot remove the start directory */ + goto out; + } + + if (dir[DIR_Attr] & AM_RDO) { + res = -EROFS; /* Cannot remove R/O object */ + goto out; + } + + dclst = LD_CLUST(dir); + if (dir[DIR_Attr] & AM_DIR) { /* Is it a sub-dir? */ + if (dclst < 2) { + res = -ERESTARTSYS; + goto out; + } + memcpy(&sdj, &dj, sizeof(FF_DIR)); /* Check if the sub-dir is empty or not */ + sdj.sclust = dclst; + res = dir_sdi(&sdj, 2); /* Exclude dot entries */ + if (res) + goto out; + + res = dir_read(&sdj); + if (res == 0) { + res = -ENOTEMPTY; /* Not empty dir */ + goto out; + } + if (res == -ENOENT) + res = 0; /* Empty */ + if (res) + goto out; + } + + res = dir_remove(&dj); /* Remove the directory entry */ + if (res) + goto out; + + if (dclst) { + /* Remove the cluster chain if exist */ + res = remove_chain(dj.fs, dclst); + if (res) + goto out; + } + + res = sync(dj.fs); + +out: + FREE_BUF(); + + return res; +} + +/* + * Create a Directory + */ +int f_mkdir ( + FATFS *fatfs, + const TCHAR *path /* Pointer to the directory path */ +) +{ + int res; + FF_DIR dj; + BYTE *dir, n; + DWORD dsc, dcl, pcl, tim = get_fattime(); + DEF_NAMEBUF; + + dj.fs = fatfs; + + INIT_BUF(dj); + res = follow_path(&dj, path); /* Follow the file path */ + if (res == 0) { + res = -EEXIST; /* Any object with same name is already existing */ + goto out; + } + + if (res != -ENOENT) + goto out; + + dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */ + if (dcl == 0) { + res = -ENOSPC; /* No space to allocate a new cluster */ + goto out; + } + if (dcl == 1) { + res = -ERESTARTSYS; + goto out; + } + + if (dcl == 0xFFFFFFFF) { + res = -EIO; + goto out; + } + + /* Flush FAT */ + res = move_window(dj.fs, 0); + if (res) + goto out; + + /* Initialize the new directory table */ + dsc = clust2sect(dj.fs, dcl); + dir = dj.fs->win; + memset(dir, 0, SS(dj.fs)); + memset(dir+DIR_Name, ' ', 8+3); /* Create "." entry */ + dir[DIR_Name] = '.'; + dir[DIR_Attr] = AM_DIR; + ST_DWORD(dir+DIR_WrtTime, tim); + ST_CLUST(dir, dcl); + memcpy(dir+SZ_DIR, dir, SZ_DIR); /* Create ".." entry */ + dir[33] = '.'; pcl = dj.sclust; + if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase) + pcl = 0; + ST_CLUST(dir+SZ_DIR, pcl); + for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */ + dj.fs->winsect = dsc++; + dj.fs->wflag = 1; + res = move_window(dj.fs, 0); + if (res != 0) + goto out; + memset(dir, 0, SS(dj.fs)); + } + + res = dir_register(&dj); /* Register the object to the directoy */ + if (res) { + remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */ + goto out; + } + + dir = dj.dir; + dir[DIR_Attr] = AM_DIR; /* Attribute */ + ST_DWORD(dir+DIR_WrtTime, tim); /* Created time */ + ST_CLUST(dir, dcl); /* Table start cluster */ + dj.fs->wflag = 1; + res = sync(dj.fs); + +out: + FREE_BUF(); + + return res; +} + +/* + * Change Attribute + */ +int f_chmod ( + FATFS *fatfs, + const TCHAR *path, /* Pointer to the file path */ + BYTE value, /* Attribute bits */ + BYTE mask /* Attribute mask to change */ +) +{ + int res; + FF_DIR dj; + BYTE *dir; + DEF_NAMEBUF; + + dj.fs = fatfs; + + INIT_BUF(dj); + res = follow_path(&dj, path); /* Follow the file path */ + FREE_BUF(); + if (res == 0 && (dj.fn[NS] & NS_DOT)) + res = -ENOENT; + if (res == 0) { + dir = dj.dir; + if (!dir) { /* Is it a root directory? */ + res = -EINVAL; + } else { /* File or sub directory */ + mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */ + dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */ + dj.fs->wflag = 1; + res = sync(dj.fs); + } + } + + return res; +} + +/* + * Change Timestamp + */ +int f_utime ( + FATFS *fatfs, + const TCHAR *path, /* Pointer to the file/directory name */ + const FILINFO *fno /* Pointer to the time stamp to be set */ +) +{ + int res; + FF_DIR dj; + BYTE *dir; + DEF_NAMEBUF; + + dj.fs = fatfs; + + INIT_BUF(dj); + res = follow_path(&dj, path); /* Follow the file path */ + FREE_BUF(); + if (res == 0 && (dj.fn[NS] & NS_DOT)) + res = -ENOENT; + if (res == 0) { + dir = dj.dir; + if (!dir) { /* Root directory */ + res = -EINVAL; + } else { /* File or sub-directory */ + ST_WORD(dir+DIR_WrtTime, fno->ftime); + ST_WORD(dir+DIR_WrtDate, fno->fdate); + dj.fs->wflag = 1; + res = sync(dj.fs); + } + } + + return res; +} + +/* + * Rename File/Directory + */ +int f_rename ( + FATFS *fatfs, + const TCHAR *path_old, /* Pointer to the old name */ + const TCHAR *path_new /* Pointer to the new name */ +) +{ + int res; + FF_DIR djo, djn; + BYTE buf[21], *dir; + DWORD dw; + DEF_NAMEBUF; + + djo.fs = fatfs; + + djn.fs = djo.fs; + INIT_BUF(djo); + res = follow_path(&djo, path_old); /* Check old object */ + if (res == 0 && (djo.fn[NS] & NS_DOT)) { + res = -EINVAL; + goto out; + } + + if (res) + goto out; + + /* Old object is found */ + if (!djo.dir) { /* Is root dir? */ + res = -EINVAL; + goto out; + } + + memcpy(buf, djo.dir+DIR_Attr, 21); /* Save the object information except for name */ + memcpy(&djn, &djo, sizeof(FF_DIR)); /* Check new object */ + res = follow_path(&djn, path_new); + if (res == 0) { + res = -EEXIST; /* The new object name is already existing */ + goto out; + } + + if (res != -ENOENT) + goto out; + + /* It ia a valid path and no name collision */ + + res = dir_register(&djn); /* Register the new entry */ + if (res) + goto out; + + dir = djn.dir; /* Copy object information except for name */ + memcpy(dir+13, buf+2, 19); + dir[DIR_Attr] = buf[0] | AM_ARC; + djo.fs->wflag = 1; + /* Update .. entry in the directory if needed */ + if (djo.sclust != djn.sclust && (dir[DIR_Attr] & AM_DIR)) { + dw = clust2sect(djn.fs, LD_CLUST(dir)); + if (!dw) { + res = -ERESTARTSYS; + goto out; + } + + res = move_window(djn.fs, dw); + if (res) + goto out; + dir = djn.fs->win+SZ_DIR; /* .. entry */ + if (dir[1] == '.') { + dw = (djn.fs->fs_type == FS_FAT32 && djn.sclust == djn.fs->dirbase) ? 0 : djn.sclust; + ST_CLUST(dir, dw); + djn.fs->wflag = 1; + } + } + + res = dir_remove(&djo); /* Remove old entry */ + if (res) + goto out; + + res = sync(djo.fs); + +out: + FREE_BUF(); + + return res; +} +#endif /* CONFIG_FS_FAT_WRITE */ diff --git a/fs/fat/ff.h b/fs/fat/ff.h new file mode 100644 index 0000000..e86ca3a --- /dev/null +++ b/fs/fat/ff.h @@ -0,0 +1,239 @@ +/*---------------------------------------------------------------------------/ +/ FatFs - FAT file system module include file R0.08b (C)ChaN, 2011 +/----------------------------------------------------------------------------/ +/ FatFs module is a generic FAT file system module for small embedded systems. +/ This is a free software that opened for education, research and commercial +/ developments under license policy of following trems. +/ +/ Copyright (C) 2011, ChaN, all right reserved. +/ +/ * The FatFs module is a free software and there is NO WARRANTY. +/ * No restriction on use. You can use, modify and redistribute it for +/ personal, non-profit or commercial product UNDER YOUR RESPONSIBILITY. +/ * Redistributions of source code must retain the above copyright notice. +/ +/----------------------------------------------------------------------------*/ + +#ifndef _FATFS +#define _FATFS 8237 /* Revision ID */ + +#include +#include + +#include "integer.h" /* Basic integer types */ +#include "ffconf.h" /* FatFs configuration options */ + +#if _FATFS != _FFCONF +#error Wrong configuration file (ffconf.h). +#endif + +/* Type of path name strings on FatFs API */ + +#if _LFN_UNICODE /* Unicode string */ +#ifndef CONFIG_FS_FAT_LFN +#error _LFN_UNICODE must be 0 in non-LFN cfg. +#endif +#ifndef _INC_TCHAR +typedef WCHAR TCHAR; +#define _T(x) L ## x +#define _TEXT(x) L ## x +#endif + +#else /* ANSI/OEM string */ +#ifndef _INC_TCHAR +typedef char TCHAR; +#define _T(x) x +#define _TEXT(x) x +#endif + +#endif + + + +/* File system object structure (FATFS) */ + +typedef struct { + BYTE fs_type; /* FAT sub-type (0:Not mounted) */ + BYTE drv; /* Physical drive number */ + BYTE csize; /* Sectors per cluster (1,2,4...128) */ + BYTE n_fats; /* Number of FAT copies (1,2) */ + BYTE wflag; /* win[] dirty flag (1:must be written back) */ + BYTE fsi_flag; /* fsinfo dirty flag (1:must be written back) */ + WORD n_rootdir; /* Number of root directory entries (FAT12/16) */ +#if _MAX_SS != 512 + WORD ssize; /* Bytes per sector (512,1024,2048,4096) */ +#endif +#ifdef CONFIG_FS_FAT_WRITE + DWORD last_clust; /* Last allocated cluster */ + DWORD free_clust; /* Number of free clusters */ + DWORD fsi_sector; /* fsinfo sector (FAT32) */ +#endif + DWORD n_fatent; /* Number of FAT entries (= number of clusters + 2) */ + DWORD fsize; /* Sectors per FAT */ + DWORD fatbase; /* FAT start sector */ + DWORD dirbase; /* Root directory start sector (FAT32:Cluster#) */ + DWORD database; /* Data start sector */ + DWORD winsect; /* Current sector appearing in the win[] */ + BYTE win[_MAX_SS]; /* Disk access window for Directory, FAT (and Data on tiny cfg) */ + void *userdata; /* User data, ff core does not touch this */ + struct list_head dirtylist; +} FATFS; + + + +/* File object structure (FIL) */ + +typedef struct { + FATFS* fs; /* Pointer to the owner file system object */ + BYTE flag; /* File status flags */ + BYTE pad1; + DWORD fptr; /* File read/write pointer (0 on file open) */ + DWORD fsize; /* File size */ + DWORD sclust; /* File start cluster (0 when fsize==0) */ + DWORD clust; /* Current cluster */ + DWORD dsect; /* Current data sector */ +#ifdef CONFIG_FS_FAT_WRITE + DWORD dir_sect; /* Sector containing the directory entry */ + BYTE* dir_ptr; /* Ponter to the directory entry in the window */ +#endif +#if _USE_FASTSEEK + DWORD* cltbl; /* Pointer to the cluster link map table (null on file open) */ +#endif +#if _FS_SHARE + UINT lockid; /* File lock ID (index of file semaphore table) */ +#endif +#if !_FS_TINY + BYTE buf[_MAX_SS]; /* File data read/write buffer */ +#endif +} FIL; + + + +/* Directory object structure (DIR) */ + +typedef struct { + FATFS* fs; /* Pointer to the owner file system object */ + WORD index; /* Current read/write index number */ + DWORD sclust; /* Table start cluster (0:Root dir) */ + DWORD clust; /* Current cluster */ + DWORD sect; /* Current sector */ + BYTE* dir; /* Pointer to the current SFN entry in the win[] */ + BYTE* fn; /* Pointer to the SFN (in/out) {file[8],ext[3],status[1]} */ +#ifdef CONFIG_FS_FAT_LFN + WCHAR* lfn; /* Pointer to the LFN working buffer */ + WORD lfn_idx; /* Last matched LFN index number (0xFFFF:No LFN) */ +#endif +} FF_DIR; + + + +/* File status structure (FILINFO) */ + +typedef struct { + DWORD fsize; /* File size */ + WORD fdate; /* Last modified date */ + WORD ftime; /* Last modified time */ + BYTE fattrib; /* Attribute */ + TCHAR fname[13]; /* Short file name (8.3 format) */ +#ifdef CONFIG_FS_FAT_LFN + TCHAR* lfname; /* Pointer to the LFN buffer */ + UINT lfsize; /* Size of LFN buffer in TCHAR */ +#endif +} FILINFO; + +/*--------------------------------------------------------------*/ +/* FatFs module application interface */ + +int f_mount (FATFS*); /* Mount/Unmount a logical drive */ +int f_open (FATFS*, FIL*, const TCHAR*, BYTE); /* Open or create a file */ +int f_read (FIL*, void*, UINT, UINT*); /* Read data from a file */ +int f_lseek (FIL*, DWORD); /* Move file pointer of a file object */ +int f_close (FIL*); /* Close an open file object */ +int f_opendir (FATFS*, FF_DIR*, const TCHAR*); /* Open an existing directory */ +int f_readdir (FF_DIR*, FILINFO*); /* Read a directory item */ +int f_stat (FATFS*, const TCHAR*, FILINFO*); /* Get file status */ +int f_write (FIL*, const void*, UINT, UINT*); /* Write data to a file */ +int f_getfree (FATFS*, const TCHAR*, DWORD*); /* Get number of free clusters on the drive */ +int f_truncate (FIL*); /* Truncate file */ +int f_sync (FIL*); /* Flush cached data of a writing file */ +int f_unlink (FATFS*, const TCHAR*); /* Delete an existing file or directory */ +int f_mkdir (FATFS*, const TCHAR*); /* Create a new directory */ +int f_chmod (FATFS*, const TCHAR*, BYTE, BYTE); /* Change attriburte of the file/dir */ +int f_utime (FATFS*, const TCHAR*, const FILINFO*); /* Change timestamp of the file/dir */ +int f_rename (FATFS*, const TCHAR*, const TCHAR*); /* Rename/Move a file or directory */ +int f_forward (FIL*, UINT(*)(const BYTE*,UINT), UINT, UINT*); /* Forward data to the stream */ +int f_mkfs (BYTE, BYTE, UINT); /* Create a file system on the drive */ +int f_chdrive (BYTE); /* Change current drive */ +int f_chdir (const TCHAR*); /* Change current directory */ +int f_getcwd (TCHAR*, UINT); /* Get current directory */ +int f_putc (TCHAR, FIL*); /* Put a character to the file */ +int f_puts (const TCHAR*, FIL*); /* Put a string to the file */ +int f_printf (FIL*, const TCHAR*, ...); /* Put a formatted string to the file */ +TCHAR* f_gets (TCHAR*, int, FIL*); /* Get a string from the file */ + +#ifndef EOF +#define EOF (-1) +#endif + +#define f_eof(fp) (((fp)->fptr == (fp)->fsize) ? 1 : 0) +#define f_error(fp) (((fp)->flag & FA__ERROR) ? 1 : 0) +#define f_tell(fp) ((fp)->fptr) +#define f_size(fp) ((fp)->fsize) + +/*--------------------------------------------------------------*/ +/* Additional user defined functions */ + +/* RTC function */ +DWORD get_fattime (void); + +/* Unicode support functions */ +WCHAR ff_convert (WCHAR, UINT); /* OEM-Unicode bidirectional conversion */ +WCHAR ff_wtoupper (WCHAR); /* Unicode upper-case conversion */ + +/*--------------------------------------------------------------*/ +/* Flags and offset address */ + + +/* File access control and file status flags (FIL.flag) */ + +#define FA_READ 0x01 +#define FA_OPEN_EXISTING 0x00 +#define FA__ERROR 0x80 + +#define FA_WRITE 0x02 +#define FA_CREATE_NEW 0x04 +#define FA_CREATE_ALWAYS 0x08 +#define FA_OPEN_ALWAYS 0x10 +#define FA__WRITTEN 0x20 +#define FA__DIRTY 0x40 + +/* FAT sub type (FATFS.fs_type) */ + +#define FS_FAT12 1 +#define FS_FAT16 2 +#define FS_FAT32 3 + + +/* File attribute bits for directory entry */ + +#define AM_RDO 0x01 /* Read only */ +#define AM_HID 0x02 /* Hidden */ +#define AM_SYS 0x04 /* System */ +#define AM_VOL 0x08 /* Volume label */ +#define AM_LFN 0x0F /* LFN entry */ +#define AM_DIR 0x10 /* Directory */ +#define AM_ARC 0x20 /* Archive */ +#define AM_MASK 0x3F /* Mask of defined bits */ + + +/* Fast seek function */ +#define CREATE_LINKMAP 0xFFFFFFFF + +/* Multi-byte word access macros */ + +#define LD_WORD(ptr) get_unaligned_le16(ptr) +#define LD_DWORD(ptr) get_unaligned_le32(ptr) +#define ST_WORD(ptr,val) put_unaligned_le16(val, ptr) +#define ST_DWORD(ptr,val) put_unaligned_le32(val, ptr) + +#endif /* _FATFS */ diff --git a/fs/fat/ffconf.h b/fs/fat/ffconf.h new file mode 100644 index 0000000..2f6a6c1 --- /dev/null +++ b/fs/fat/ffconf.h @@ -0,0 +1,145 @@ +/*---------------------------------------------------------------------------/ +/ FatFs - FAT file system module configuration file R0.08b (C)ChaN, 2011 +/----------------------------------------------------------------------------/ +/ +/ CAUTION! Do not forget to make clean the project after any changes to +/ the configuration options. +/ +/----------------------------------------------------------------------------*/ +#ifndef _FFCONF +#define _FFCONF 8237 /* Revision ID */ + + +/*---------------------------------------------------------------------------/ +/ Function and Buffer Configurations +/----------------------------------------------------------------------------*/ + +#define _FS_TINY 0 /* 0:Normal or 1:Tiny */ +/* When _FS_TINY is set to 1, FatFs uses the sector buffer in the file system +/ object instead of the sector buffer in the individual file object for file +/ data transfer. This reduces memory consumption 512 bytes each file object. */ + +#define _USE_STRFUNC 0 /* 0:Disable or 1/2:Enable */ +/* To enable string functions, set _USE_STRFUNC to 1 or 2. */ + + +#define _USE_MKFS 0 /* 0:Disable or 1:Enable */ +/* To enable f_mkfs function, set _USE_MKFS to 1 and set _FS_READONLY to 0 */ + + +#define _USE_FORWARD 0 /* 0:Disable or 1:Enable */ +/* To enable f_forward function, set _USE_FORWARD to 1 and set _FS_TINY to 1. */ + + +#define _USE_FASTSEEK 0 /* 0:Disable or 1:Enable */ +/* To enable fast seek feature, set _USE_FASTSEEK to 1. */ + + + +/*---------------------------------------------------------------------------/ +/ Locale and Namespace Configurations +/----------------------------------------------------------------------------*/ + +#define _CODE_PAGE 932 +/* The _CODE_PAGE specifies the OEM code page to be used on the target system. +/ Incorrect setting of the code page can cause a file open failure. +/ +/ 932 - Japanese Shift-JIS (DBCS, OEM, Windows) +/ 936 - Simplified Chinese GBK (DBCS, OEM, Windows) +/ 949 - Korean (DBCS, OEM, Windows) +/ 950 - Traditional Chinese Big5 (DBCS, OEM, Windows) +/ 1250 - Central Europe (Windows) +/ 1251 - Cyrillic (Windows) +/ 1252 - Latin 1 (Windows) +/ 1253 - Greek (Windows) +/ 1254 - Turkish (Windows) +/ 1255 - Hebrew (Windows) +/ 1256 - Arabic (Windows) +/ 1257 - Baltic (Windows) +/ 1258 - Vietnam (OEM, Windows) +/ 437 - U.S. (OEM) +/ 720 - Arabic (OEM) +/ 737 - Greek (OEM) +/ 775 - Baltic (OEM) +/ 850 - Multilingual Latin 1 (OEM) +/ 858 - Multilingual Latin 1 + Euro (OEM) +/ 852 - Latin 2 (OEM) +/ 855 - Cyrillic (OEM) +/ 866 - Russian (OEM) +/ 857 - Turkish (OEM) +/ 862 - Hebrew (OEM) +/ 874 - Thai (OEM, Windows) +/ 1 - ASCII only (Valid for non LFN cfg.) +*/ + +#define _MAX_LFN 255 /* Maximum LFN length to handle (12 to 255) */ + +#define ff_memalloc xzalloc +#define ff_memfree free +/* The _USE_LFN option switches the LFN support. +/ +/ 0: Disable LFN feature. _MAX_LFN and _LFN_UNICODE have no effect. +/ 1: Enable LFN with static working buffer on the BSS. Always NOT reentrant. +/ 2: Enable LFN with dynamic working buffer on the STACK. +/ 3: Enable LFN with dynamic working buffer on the HEAP. +/ +/ The LFN working buffer occupies (_MAX_LFN + 1) * 2 bytes. To enable LFN, +/ Unicode handling functions ff_convert() and ff_wtoupper() must be added +/ to the project. When enable to use heap, memory control functions +/ ff_memalloc() and ff_memfree() must be added to the project. */ + + +#define _LFN_UNICODE 0 /* 0:ANSI/OEM or 1:Unicode */ +/* To switch the character code set on FatFs API to Unicode, +/ enable LFN feature and set _LFN_UNICODE to 1. */ + +/*---------------------------------------------------------------------------/ +/ Physical Drive Configurations +/----------------------------------------------------------------------------*/ + +#define _VOLUMES 1 +/* Number of volumes (logical drives) to be used. */ + + +#define _MAX_SS 512 /* 512, 1024, 2048 or 4096 */ +/* Maximum sector size to be handled. +/ Always set 512 for memory card and hard disk but a larger value may be +/ required for on-board flash memory, floppy disk and optical disk. +/ When _MAX_SS is larger than 512, it configures FatFs to variable sector size +/ and GET_SECTOR_SIZE command must be implememted to the disk_ioctl function. */ + +#define _USE_ERASE 0 /* 0:Disable or 1:Enable */ +/* To enable sector erase feature, set _USE_ERASE to 1. CTRL_ERASE_SECTOR command +/ should be added to the disk_ioctl functio. */ + + + +/*---------------------------------------------------------------------------/ +/ System Configurations +/----------------------------------------------------------------------------*/ + +#define _WORD_ACCESS 0 /* 0 or 1 */ +/* Set 0 first and it is always compatible with all platforms. The _WORD_ACCESS +/ option defines which access method is used to the word data on the FAT volume. +/ +/ 0: Byte-by-byte access. +/ 1: Word access. Do not choose this unless following condition is met. +/ +/ When the byte order on the memory is big-endian or address miss-aligned word +/ access results incorrect behavior, the _WORD_ACCESS must be set to 0. +/ If it is not the case, the value can also be set to 1 to improve the +/ performance and code size. */ + + +/* A header file that defines sync object types on the O/S, such as +/ windows.h, ucos_ii.h and semphr.h, must be included prior to ff.h. */ + +#define _FS_TIMEOUT 1000 /* Timeout period in unit of time ticks */ +#define _SYNC_t HANDLE /* O/S dependent type of sync object. e.g. HANDLE, OS_EVENT*, ID and etc.. */ + +#define _FS_SHARE 0 /* 0:Disable or >=1:Enable */ +/* To enable file shareing feature, set _FS_SHARE to 1 or greater. The value + defines how many files can be opened simultaneously. */ + + +#endif /* _FFCONFIG */ diff --git a/fs/fat/integer.h b/fs/fat/integer.h new file mode 100644 index 0000000..04956aa --- /dev/null +++ b/fs/fat/integer.h @@ -0,0 +1,28 @@ +/*-------------------------------------------*/ +/* Integer type definitions for FatFs module */ +/*-------------------------------------------*/ + +#ifndef _INTEGER +#define _INTEGER + +/* These types must be 16-bit, 32-bit or larger integer */ +typedef int INT; +typedef unsigned int UINT; + +/* These types must be 8-bit integer */ +typedef char CHAR; +typedef unsigned char UCHAR; +typedef unsigned char BYTE; + +/* These types must be 16-bit integer */ +typedef short SHORT; +typedef unsigned short USHORT; +typedef unsigned short WORD; +typedef unsigned short WCHAR; + +/* These types must be 32-bit integer */ +typedef long LONG; +typedef unsigned long ULONG; +typedef unsigned long DWORD; + +#endif -- 1.7.2.3 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox