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, 89 insertions, 0 deletions

diff --git a/include/rockbox_file.h b/include/rockbox_file.h
new file mode 100644
index 000000000..063c04948
--- /dev/null
+++ b/include/rockbox_file.h
@@ -0,0 +1,89 @@
+/***************************************************************************
+ * 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: file.h 17847 2008-06-28 18:10:04Z bagder $
+ * Copyright (C) 2002 by Björn Stenberg
+ ****************************************************************************
+ * See file CREDITS for list of people who contributed to the U-boot 
+ * project.
+ *
+ * 01/07/2008 etienne.carriere@stnwireless.com - update u-boot port from rockbox-3.1
+ ***************************************************************************
+ */
+#ifndef _ROCKBOX_FILE_H_
+#define _ROCKBOX_FILE_H_
+
+#include <linux/types.h>
+
+#define MAX_PATH 260
+#define MAX_OPEN_FILES 11
+
+#ifndef SEEK_SET
+#define SEEK_SET 0
+#endif
+#ifndef SEEK_CUR
+#define SEEK_CUR 1
+#endif
+#ifndef SEEK_END
+#define SEEK_END 2
+#endif
+
+#ifndef O_RDONLY
+#define O_RDONLY 0
+#define O_WRONLY 1
+#define O_RDWR   2
+#define O_CREAT  4
+#define O_APPEND 8
+#define O_TRUNC  0x10
+#endif
+
+#ifdef SIMULATOR
+#define open(x,y) sim_open(x,y)
+#define creat(x) sim_creat(x)
+#define remove(x) sim_remove(x)
+#define rename(x,y) sim_rename(x,y)
+#define filesize(x) sim_filesize(x)
+#define fsync(x) sim_fsync(x)
+#define ftruncate(x,y) sim_ftruncate(x,y)
+#define lseek(x,y,z) sim_lseek(x,y,z)
+#define read(x,y,z) sim_read(x,y,z)
+#define write(x,y,z) sim_write(x,y,z)
+#define close(x) sim_close(x)
+#endif
+
+typedef int (*open_func)(const char* pathname, int flags);
+typedef ssize_t (*read_func)(int fd, void *buf, size_t count);
+typedef int (*creat_func)(const char *pathname);
+typedef ssize_t (*write_func)(int fd, const void *buf, size_t count);
+typedef void (*qsort_func)(void *base, size_t nmemb,  size_t size,
+                           int(*_compar)(const void *, const void *));
+
+extern int open(const char *pathname, int flags);
+extern int close(int fd);
+extern int fsync(int fd);
+extern ssize_t read(int fd, void *buf, size_t count);
+extern off_t lseek(int fildes, off_t offset, int whence);
+extern int creat(const char *pathname);
+extern ssize_t write(int fd, const void *buf, size_t count);
+extern int remove(const char *pathname);
+extern int rename(const char *path, const char *newname);
+extern int ftruncate(int fd, off_t length);
+extern off_t filesize(int fd);
+extern int release_files(int volume);
+
+#endif				/* #ifndef _ROCKBOX_FILE_H_ */