1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * (C) Copyright 2011 - 2012 Samsung Electronics
3*4882a593Smuzhiyun * EXT4 filesystem implementation in Uboot by
4*4882a593Smuzhiyun * Uma Shankar <uma.shankar@samsung.com>
5*4882a593Smuzhiyun * Manjunatha C Achar <a.manjunatha@samsung.com>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * made from existing ext2/dev.c file of Uboot
8*4882a593Smuzhiyun * (C) Copyright 2004
9*4882a593Smuzhiyun * esd gmbh <www.esd-electronics.com>
10*4882a593Smuzhiyun * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
11*4882a593Smuzhiyun *
12*4882a593Smuzhiyun * based on code of fs/reiserfs/dev.c by
13*4882a593Smuzhiyun *
14*4882a593Smuzhiyun * (C) Copyright 2003 - 2004
15*4882a593Smuzhiyun * Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
16*4882a593Smuzhiyun *
17*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
18*4882a593Smuzhiyun */
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun /*
21*4882a593Smuzhiyun * Changelog:
22*4882a593Smuzhiyun * 0.1 - Newly created file for ext4fs support. Taken from
23*4882a593Smuzhiyun * fs/ext2/dev.c file in uboot.
24*4882a593Smuzhiyun */
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun #include <common.h>
27*4882a593Smuzhiyun #include <blk.h>
28*4882a593Smuzhiyun #include <config.h>
29*4882a593Smuzhiyun #include <fs_internal.h>
30*4882a593Smuzhiyun #include <ext4fs.h>
31*4882a593Smuzhiyun #include <ext_common.h>
32*4882a593Smuzhiyun #include "ext4_common.h"
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun lbaint_t part_offset;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun static struct blk_desc *ext4fs_blk_desc;
37*4882a593Smuzhiyun static disk_partition_t *part_info;
38*4882a593Smuzhiyun
ext4fs_set_blk_dev(struct blk_desc * rbdd,disk_partition_t * info)39*4882a593Smuzhiyun void ext4fs_set_blk_dev(struct blk_desc *rbdd, disk_partition_t *info)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun assert(rbdd->blksz == (1 << rbdd->log2blksz));
42*4882a593Smuzhiyun ext4fs_blk_desc = rbdd;
43*4882a593Smuzhiyun get_fs()->dev_desc = rbdd;
44*4882a593Smuzhiyun part_info = info;
45*4882a593Smuzhiyun part_offset = info->start;
46*4882a593Smuzhiyun get_fs()->total_sect = ((uint64_t)info->size * info->blksz) >>
47*4882a593Smuzhiyun get_fs()->dev_desc->log2blksz;
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
ext4fs_devread(lbaint_t sector,int byte_offset,int byte_len,char * buffer)50*4882a593Smuzhiyun int ext4fs_devread(lbaint_t sector, int byte_offset, int byte_len,
51*4882a593Smuzhiyun char *buffer)
52*4882a593Smuzhiyun {
53*4882a593Smuzhiyun return fs_devread(get_fs()->dev_desc, part_info, sector, byte_offset,
54*4882a593Smuzhiyun byte_len, buffer);
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
ext4_read_superblock(char * buffer)57*4882a593Smuzhiyun int ext4_read_superblock(char *buffer)
58*4882a593Smuzhiyun {
59*4882a593Smuzhiyun struct ext_filesystem *fs = get_fs();
60*4882a593Smuzhiyun int sect = SUPERBLOCK_START >> fs->dev_desc->log2blksz;
61*4882a593Smuzhiyun int off = SUPERBLOCK_START % fs->dev_desc->blksz;
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun return ext4fs_devread(sect, off, SUPERBLOCK_SIZE,
64*4882a593Smuzhiyun buffer);
65*4882a593Smuzhiyun }
66