1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2011 - 2012 Samsung Electronics
4 * EXT4 filesystem implementation in Uboot by
5 * Uma Shankar <uma.shankar@samsung.com>
6 * Manjunatha C Achar <a.manjunatha@samsung.com>
7 *
8 * made from existing ext2/dev.c file of Uboot
9 * (C) Copyright 2004
10 * esd gmbh <www.esd-electronics.com>
11 * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
12 *
13 * based on code of fs/reiserfs/dev.c by
14 *
15 * (C) Copyright 2003 - 2004
16 * Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
17 */
18
19 /*
20 * Changelog:
21 * 0.1 - Newly created file for ext4fs support. Taken from
22 * fs/ext2/dev.c file in uboot.
23 */
24
25 #include <common.h>
26 #include <blk.h>
27 #include <config.h>
28 #include <fs_internal.h>
29 #include <ext4fs.h>
30 #include <ext_common.h>
31 #include "ext4_common.h"
32
33 lbaint_t part_offset;
34
35 static struct blk_desc *ext4fs_blk_desc;
36 static disk_partition_t *part_info;
37
ext4fs_set_blk_dev(struct blk_desc * rbdd,disk_partition_t * info)38 void ext4fs_set_blk_dev(struct blk_desc *rbdd, disk_partition_t *info)
39 {
40 assert(rbdd->blksz == (1 << rbdd->log2blksz));
41 ext4fs_blk_desc = rbdd;
42 get_fs()->dev_desc = rbdd;
43 part_info = info;
44 part_offset = info->start;
45 get_fs()->total_sect = ((uint64_t)info->size * info->blksz) >>
46 get_fs()->dev_desc->log2blksz;
47 }
48
ext4fs_devread(lbaint_t sector,int byte_offset,int byte_len,char * buffer)49 int ext4fs_devread(lbaint_t sector, int byte_offset, int byte_len,
50 char *buffer)
51 {
52 return fs_devread(get_fs()->dev_desc, part_info, sector, byte_offset,
53 byte_len, buffer);
54 }
55
ext4_read_superblock(char * buffer)56 int ext4_read_superblock(char *buffer)
57 {
58 struct ext_filesystem *fs = get_fs();
59 int sect = SUPERBLOCK_START >> fs->dev_desc->log2blksz;
60 int off = SUPERBLOCK_START % fs->dev_desc->blksz;
61
62 return ext4fs_devread(sect, off, SUPERBLOCK_SIZE,
63 buffer);
64 }
65