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, 75 insertions, 0 deletions

diff --git a/include/rbunicode.h b/include/rbunicode.h
new file mode 100644
index 000000000..cecd9d780
--- /dev/null
+++ b/include/rbunicode.h
@@ -0,0 +1,75 @@
+/***************************************************************************
+ * Copyright (c) 2004,2005 by Marcoen Hirschberg
+ *
+ * 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: rbunicode.h 19339 2008-12-04 22:00:12Z zagor $
+ * Copyright (c) 2004,2005 by Marcoen Hirschberg
+ *
+ * See file CREDITS for list of people who contributed to the U-boot 
+ * project.
+ *
+ ****************************************************************************
+ * Some conversion functions for handling UTF-8
+ *
+ *   I got all the info from:
+ *   http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
+ *   and
+ *   http://en.wikipedia.org/wiki/Unicode
+ ****************************************************************************
+ * 09-jan-2008 etienne.carriere@stnwireless.com - port from rockbox to U-boot
+ ****************************************************************************
+ */
+#ifndef _RBUNICODE_H_
+#define _RBUNICODE_H_
+ 
+/* not applicable for u-boot
+ * #ifndef __PCTOOL__
+ * #include "config.h"
+ * #endif
+ */
+
+#define MASK   0xC0 /* 11000000 */
+#define COMP   0x80 /* 10x      */
+
+#ifdef HAVE_LCD_BITMAP
+ 
+enum codepages {
+    ISO_8859_1 = 0, ISO_8859_7, ISO_8859_8, WIN_1251,
+    ISO_8859_11, WIN_1256, ISO_8859_9, ISO_8859_2, WIN_1250,
+    SJIS, GB_2312, KSX_1001, BIG_5, UTF_8, NUM_CODEPAGES
+};
+
+#else /* !HAVE_LCD_BITMAP, reduced support */
+
+enum codepages {
+    ISO_8859_1 = 0, ISO_8859_7, WIN_1251, ISO_8859_9,
+    ISO_8859_2, WIN_1250, UTF_8, NUM_CODEPAGES
+};
+
+#endif
+
+/* Encode a UCS value as UTF-8 and return a pointer after this UTF-8 char. */
+unsigned char* utf8encode(unsigned long ucs, unsigned char *utf8);
+unsigned char* iso_decode(const unsigned char *latin1, unsigned char *utf8, int cp, int count);
+unsigned char* utf16LEdecode(const unsigned char *utf16, unsigned char *utf8, int count);
+unsigned char* utf16BEdecode(const unsigned char *utf16, unsigned char *utf8, int count);
+unsigned long utf8length(const unsigned char *utf8);
+const unsigned char* utf8decode(const unsigned char *utf8, unsigned short *ucs);
+void set_codepage(int cp);
+int utf8seek(const unsigned char* utf8, int offset);
+const char* get_codepage_name(int cp);
+#endif /* _RBUNICODE_H_ */