Read/write VFAT support from Rockbox-3.3 FAT stack

Add read/write VFAT support from Rockbox-3.3 FAT stack.
It should be also applicable to the unmodified 2009.11 U-Boot release.

Note that is was taken as is from Rockbox and from a older U-Boot
Rockbox patch. "checkpatch" shows very many coding style errors and
warnings, but it is tedious work to clean this up.

To make this patch work an additional mmc_block_write() board support
routine and the errno variable are needed.
Furthermore following defines in the board config header file:
	#define CONFIG_ROCKBOX_FAT	1
	#define CONFIG_U_BOOT		1
	#define CONFIG_SUPPORT_VFAT	1
	#define CONFIG_CMD_TREE_FAT
This will be added in a follow-up patch.

This patch is based on the patch from Etienne Carriere
<etienne.carriere@stericsson.com> for the U671x U-Boot:

This commit adds FAT write support to u-boot native read-only FAT code.
Commit initially applied on u-boot-v2009.01
(SHA1: 72d15e705bc3983884105cb7755c7ba80e74a0a5)

Based on FAT stack dumped from Rockbox package v3.1 (www.rockbox.org).
Based on initial Rockbox FAT stack integration in u-boot by Keith Outwater
(outwater@comcast.net).
Current porting is aligned with Rockbox v3.3 FAT stack.

Enable upon config switches:
CONFIG_CMD_FAT
CONFIG_ROCKBOX_FAT
CONFIG_CMD_TREE_FAT   (recommended)
CONFIG_SUPPORT_VFAT   (recommended)

C code APIs (from U-boot native FAT support):
int  fat_register_device(block_dev_desc_t *dev_desc, int part_no);
long file_fat_read(const char *path, void *buf, unsigned long maxsize);
int file_fat_ls(const char *dirname);
int file_fat_detectfs(void);

C code APIs (added by Rockbox FAT support):
long file_fat_write(const char *path, void *buf, unsigned long maxsize);
int file_fat_rm(const char *path);
int file_fat_rmdir(const char *path);
int file_fat_mkdir(const char *path);
int file_fat_cd(const char *path);
int file_fat_pwd(void);
int file_fat_mv(const char *oldpath, const char *newpath);
unsigned int rockbox_fat_free(unsigned long size_kbyte);
unsigned int rockbox_fat_size(void);

Use "help fat" from u-boot console to see available commands.

ST-Ericsson ID: WP264488

Change-Id: I9afc29ecb80f9152bd8534bbf11e47e54cfad796
Signed-off-by: Michael Brandt <michael.brandt@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/3009

1 files changed, 128 insertions, 0 deletions

diff --git a/include/rockbox_dir.h b/include/rockbox_dir.h
new file mode 100644
index 000000000..b184fcc47
--- /dev/null
+++ b/include/rockbox_dir.h
@@ -0,0 +1,128 @@
+/***************************************************************************
+ * Copyright (C) 2002 by Björn Stenberg
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************
+ * Source file dumped from rockbox-3.1 distribution.
+ * $Id: dir.h 13741 2007-06-30 02:08:27Z jethead71 $
+ * Copyright (C) 2002 by Björn Stenberg
+ ****************************************************************************
+ * See file CREDITS for list of people who contributed to the U-boot 
+ * project.
+ *
+ * 01/17/2006 Keith Outwater (outwater4@comcast.net) - port to U-Boot using
+ *     CVS version 1.12 of 'firmware/common/dir.h' from rockbox CVS server.
+ * 01/07/2008 etienne.carriere@stnwireless.com - update u-boot port from rockbox-3.1
+ ***************************************************************************
+ */
+#ifndef _ROCKBOX_DIR_H_
+#define _ROCKBOX_DIR_H_
+
+#ifdef HAVE_DIRCACHE
+#error ""
+# include "dircache.h"
+# define DIR DIR_CACHED
+# define dirent dircache_entry
+# define opendir opendir_cached
+# define closedir closedir_cached
+# define readdir readdir_cached
+# define closedir closedir_cached
+# define mkdir mkdir_cached
+# define rmdir rmdir_cached
+#else
+/*#include "dir_uncached.h"  U-boot port: dir-uncached.h and dir.h current melded */
+# define DIR DIR_UNCACHED
+# define dirent dirent_uncached
+# define opendir opendir_uncached
+# define closedir closedir_uncached
+# define readdir readdir_uncached
+# define closedir closedir_uncached
+# define mkdir mkdir_uncached
+# define rmdir rmdir_uncached
+#endif
+
+#include <stdbool.h>
+#include <rockbox_file.h>
+
+#define ATTR_READ_ONLY   0x01
+#define ATTR_HIDDEN      0x02
+#define ATTR_SYSTEM      0x04
+#define ATTR_VOLUME_ID   0x08
+#define ATTR_DIRECTORY   0x10
+#define ATTR_ARCHIVE     0x20
+#define ATTR_VOLUME      0x40 /* this is a volume, not a real directory */
+
+#ifdef SIMULATOR
+#define dirent_uncached sim_dirent
+#define DIR_UNCACHED SIM_DIR
+#define opendir_uncached sim_opendir
+#define readdir_uncached sim_readdir
+#define closedir_uncached sim_closedir
+#define mkdir_uncached sim_mkdir
+#define rmdir_uncached sim_rmdir
+#endif
+#ifndef DIRENT_DEFINED
+
+struct dirent {
+	unsigned char d_name[MAX_PATH];
+	int attribute;
+	long size;
+	long startcluster;
+	unsigned short wrtdate;	/* Last write date */
+	unsigned short wrttime;	/* Last write time */
+};
+#endif
+
+#include <rockbox_fat.h>
+
+typedef struct {
+#ifndef SIMULATOR
+	bool busy;
+	long startcluster;
+	struct fat_dir fatdir;
+	struct fat_dir parent_dir;
+    struct dirent_uncached theent;
+#ifdef HAVE_MULTIVOLUME
+    int volumecounter; /* running counter for faked volume entries */
+#endif
+#else
+    /* simulator: */
+    void *dir; /* actually a DIR* dir */
+    char *name;
+#endif
+} DIR_UNCACHED;
+
+#ifdef HAVE_HOTSWAP
+char *get_volume_name(int volume);
+#endif
+
+#ifdef HAVE_MULTIVOLUME
+    int strip_volume(const char*, char*);
+#endif
+
+#ifndef DIRFUNCTIONS_DEFINED
+
+extern DIR_UNCACHED* opendir_uncached(const char* name);
+extern int closedir_uncached(DIR_UNCACHED* dir);
+extern int mkdir_uncached(const char* name);
+extern int rmdir_uncached(const char* name);
+
+extern struct dirent_uncached* readdir_uncached(DIR_UNCACHED* dir);
+
+extern int release_dirs(int volume);
+
+#endif				/* DIRFUNCTIONS_DEFINED */
+
+#endif				/* #ifndef _ROCKBOX_DIR_H_ */