endif
LIBS-$(CONFIG_OF_EMBED) += dts/libdts.o
LIBS-y += arch/$(ARCH)/lib/lib$(ARCH).o
-LIBS-y += fs/cbfs/libcbfs.o \
+LIBS-y += fs/libfs.o \
+ fs/cbfs/libcbfs.o \
fs/cramfs/libcramfs.o \
fs/ext4/libext4fs.o \
fs/fat/libfat.o \
COBJS-$(CONFIG_SYS_HUSH_PARSER) += cmd_exit.o
COBJS-$(CONFIG_CMD_EXT4) += cmd_ext4.o
COBJS-$(CONFIG_CMD_EXT2) += cmd_ext2.o
-ifdef CONFIG_CMD_EXT4
-COBJS-y += cmd_ext_common.o
-else
-COBJS-$(CONFIG_CMD_EXT2) += cmd_ext_common.o
-endif
COBJS-$(CONFIG_CMD_FAT) += cmd_fat.o
COBJS-$(CONFIG_CMD_FDC)$(CONFIG_CMD_FDOS) += cmd_fdc.o
COBJS-$(CONFIG_OF_LIBFDT) += cmd_fdt.o fdt_support.o
ifdef CONFIG_FPGA
COBJS-$(CONFIG_CMD_FPGA) += cmd_fpga.o
endif
+COBJS-$(CONFIG_CMD_FS_GENERIC) += cmd_fs.o
COBJS-$(CONFIG_CMD_GPIO) += cmd_gpio.o
COBJS-$(CONFIG_CMD_I2C) += cmd_i2c.o
COBJS-$(CONFIG_CMD_IDE) += cmd_ide.o
/*
* Ext2fs support
*/
-#include <common.h>
-#include <ext_common.h>
+#include <fs.h>
int do_ext2ls (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
- if (do_ext_ls(cmdtp, flag, argc, argv))
- return -1;
-
- return 0;
+ return do_ls(cmdtp, flag, argc, argv, FS_TYPE_EXT);
}
/******************************************************************************
*/
int do_ext2load (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
- if (do_ext_load(cmdtp, flag, argc, argv))
- return -1;
-
- return 0;
+ return do_fsload(cmdtp, flag, argc, argv, FS_TYPE_EXT);
}
U_BOOT_CMD(
#include <image.h>
#include <linux/ctype.h>
#include <asm/byteorder.h>
-#include <ext_common.h>
#include <ext4fs.h>
#include <linux/stat.h>
#include <malloc.h>
+#include <fs.h>
#if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
#include <usb.h>
int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc,
char *const argv[])
{
- if (do_ext_load(cmdtp, flag, argc, argv))
- return -1;
-
- return 0;
+ return do_fsload(cmdtp, flag, argc, argv, FS_TYPE_EXT);
}
int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
{
- if (do_ext_ls(cmdtp, flag, argc, argv))
- return -1;
-
- return 0;
+ return do_ls(cmdtp, flag, argc, argv, FS_TYPE_EXT);
}
#if defined(CONFIG_CMD_EXT4_WRITE)
+++ /dev/null
-/*
- * (C) Copyright 2011 - 2012 Samsung Electronics
- * EXT2/4 filesystem implementation in Uboot by
- * Uma Shankar <uma.shankar@samsung.com>
- * Manjunatha C Achar <a.manjunatha@samsung.com>
- *
- * Ext4fs support
- * made from existing cmd_ext2.c file of Uboot
- *
- * (C) Copyright 2004
- * esd gmbh <www.esd-electronics.com>
- * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
- *
- * made from cmd_reiserfs by
- *
- * (C) Copyright 2003 - 2004
- * Sysgo Real-Time Solutions, AG <www.elinos.com>
- * Pavel Bartusek <pba@sysgo.com>
- *
- * 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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * 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
- *
- */
-
-/*
- * Changelog:
- * 0.1 - Newly created file for ext4fs support. Taken from cmd_ext2.c
- * file in uboot. Added ext4fs ls load and write support.
- */
-
-#include <common.h>
-#include <part.h>
-#include <config.h>
-#include <command.h>
-#include <image.h>
-#include <linux/ctype.h>
-#include <asm/byteorder.h>
-#include <ext_common.h>
-#include <ext4fs.h>
-#include <linux/stat.h>
-#include <malloc.h>
-
-#if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
-#include <usb.h>
-#endif
-
-#if !defined(CONFIG_DOS_PARTITION) && !defined(CONFIG_EFI_PARTITION)
-#error DOS or EFI partition support must be selected
-#endif
-
-#define DOS_PART_MAGIC_OFFSET 0x1fe
-#define DOS_FS_TYPE_OFFSET 0x36
-#define DOS_FS32_TYPE_OFFSET 0x52
-
-int do_ext_load(cmd_tbl_t *cmdtp, int flag, int argc,
- char *const argv[])
-{
- char *filename = NULL;
- int dev, part;
- ulong addr = 0;
- int filelen;
- disk_partition_t info;
- block_dev_desc_t *dev_desc;
- char buf[12];
- unsigned long count;
- const char *addr_str;
-
- count = 0;
- addr = simple_strtoul(argv[3], NULL, 16);
- filename = getenv("bootfile");
- switch (argc) {
- case 3:
- addr_str = getenv("loadaddr");
- if (addr_str != NULL)
- addr = simple_strtoul(addr_str, NULL, 16);
- else
- addr = CONFIG_SYS_LOAD_ADDR;
-
- break;
- case 4:
- break;
- case 5:
- filename = argv[4];
- break;
- case 6:
- filename = argv[4];
- count = simple_strtoul(argv[5], NULL, 16);
- break;
-
- default:
- return cmd_usage(cmdtp);
- }
-
- if (!filename) {
- puts("** No boot file defined **\n");
- return 1;
- }
-
- part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1);
- if (part < 0)
- return 1;
-
- dev = dev_desc->dev;
- printf("Loading file \"%s\" from %s device %d%c%c\n",
- filename, argv[1], dev,
- part ? ':' : ' ', part ? part + '0' : ' ');
-
- ext4fs_set_blk_dev(dev_desc, &info);
-
- if (!ext4fs_mount(info.size)) {
- printf("** Bad ext2 partition or disk - %s %d:%d **\n",
- argv[1], dev, part);
- ext4fs_close();
- goto fail;
- }
-
- filelen = ext4fs_open(filename);
- if (filelen < 0) {
- printf("** File not found %s\n", filename);
- ext4fs_close();
- goto fail;
- }
- if ((count < filelen) && (count != 0))
- filelen = count;
-
- if (ext4fs_read((char *)addr, filelen) != filelen) {
- printf("** Unable to read \"%s\" from %s %d:%d **\n",
- filename, argv[1], dev, part);
- ext4fs_close();
- goto fail;
- }
-
- ext4fs_close();
- /* Loading ok, update default load address */
- load_addr = addr;
-
- printf("%d bytes read\n", filelen);
- sprintf(buf, "%X", filelen);
- setenv("filesize", buf);
-
- return 0;
-fail:
- return 1;
-}
-
-int do_ext_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
-{
- const char *filename = "/";
- int dev;
- int part;
- block_dev_desc_t *dev_desc;
- disk_partition_t info;
-
- if (argc < 2)
- return cmd_usage(cmdtp);
-
- part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1);
- if (part < 0)
- return 1;
-
- if (argc == 4)
- filename = argv[3];
-
- dev = dev_desc->dev;
- ext4fs_set_blk_dev(dev_desc, &info);
-
- if (!ext4fs_mount(info.size)) {
- printf("** Bad ext2 partition or disk - %s %d:%d **\n",
- argv[1], dev, part);
- ext4fs_close();
- goto fail;
- }
-
- if (ext4fs_ls(filename)) {
- printf("** Error extfs_ls() **\n");
- ext4fs_close();
- goto fail;
- };
-
- ext4fs_close();
- return 0;
-
-fail:
- return 1;
-}
#include <ata.h>
#include <part.h>
#include <fat.h>
-
+#include <fs.h>
int do_fat_fsload (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
- long size;
- unsigned long offset;
- unsigned long count = 0;
- unsigned long pos = 0;
- char buf [12];
- block_dev_desc_t *dev_desc=NULL;
- disk_partition_t info;
- int part, dev;
-
- if (argc < 5) {
- printf("usage: fatload <interface> [<dev[:part]>] "
- "<addr> <filename> [bytes [pos]]\n");
- return 1;
- }
-
- part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1);
- if (part < 0)
- return 1;
-
- dev = dev_desc->dev;
- if (fat_set_blk_dev(dev_desc, &info) != 0) {
- printf("\n** Unable to use %s %d:%d for fatload **\n",
- argv[1], dev, part);
- return 1;
- }
- offset = simple_strtoul(argv[3], NULL, 16);
- if (argc >= 6)
- count = simple_strtoul(argv[5], NULL, 16);
- if (argc >= 7)
- pos = simple_strtoul(argv[6], NULL, 16);
- size = file_fat_read_at(argv[4], pos, (unsigned char *)offset, count);
-
- if(size==-1) {
- printf("\n** Unable to read \"%s\" from %s %d:%d **\n",
- argv[4], argv[1], dev, part);
- return 1;
- }
-
- printf("\n%ld bytes read\n", size);
-
- sprintf(buf, "%lX", size);
- setenv("filesize", buf);
-
- return 0;
+ return do_fsload(cmdtp, flag, argc, argv, FS_TYPE_FAT);
}
int do_fat_ls (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
- char *filename = "/";
- int ret, dev, part;
- block_dev_desc_t *dev_desc=NULL;
- disk_partition_t info;
-
- if (argc < 2) {
- printf("usage: fatls <interface> [<dev[:part]>] [directory]\n");
- return 0;
- }
-
- part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1);
- if (part < 0)
- return 1;
-
- dev = dev_desc->dev;
- if (fat_set_blk_dev(dev_desc, &info) != 0) {
- printf("\n** Unable to use %s %d:%d for fatls **\n",
- argv[1], dev, part);
- return 1;
- }
- if (argc == 4)
- ret = file_fat_ls(argv[3]);
- else
- ret = file_fat_ls(filename);
-
- if(ret!=0)
- printf("No Fat FS detected\n");
- return ret;
+ return do_ls(cmdtp, flag, argc, argv, FS_TYPE_FAT);
}
U_BOOT_CMD(
--- /dev/null
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Inspired by cmd_ext_common.c, cmd_fat.c.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <fs.h>
+
+int do_fsload_wrapper(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ return do_fsload(cmdtp, flag, argc, argv, FS_TYPE_ANY);
+}
+
+U_BOOT_CMD(
+ fsload, 7, 0, do_fsload_wrapper,
+ "load binary file from a filesystem",
+ "<interface> [<dev[:part]> [<addr> [<filename> [bytes [pos]]]]]\n"
+ " - Load binary file 'filename' from partition 'part' on device\n"
+ " type 'interface' instance 'dev' to address 'addr' in memory.\n"
+ " 'bytes' gives the size to load in bytes.\n"
+ " If 'bytes' is 0 or omitted, the file is read until the end.\n"
+ " 'pos' gives the file byte position to start reading from.\n"
+ " If 'pos' is 0 or omitted, the file is read from the start."
+);
+
+int do_ls_wrapper(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ return do_ls(cmdtp, flag, argc, argv, FS_TYPE_ANY);
+}
+
+U_BOOT_CMD(
+ ls, 4, 1, do_ls_wrapper,
+ "list files in a directory (default /)",
+ "<interface> [<dev[:part]> [directory]]\n"
+ " - List files in directory 'directory' of partition 'part' on\n"
+ " device type 'interface' instance 'dev'."
+);
--- /dev/null
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+# Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# 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.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# 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
+#
+
+include $(TOPDIR)/config.mk
+
+LIB = $(obj)libfs.o
+
+COBJS-y += fs.o
+
+COBJS := $(COBJS-y)
+SRCS := $(COBJS:.o=.c)
+OBJS := $(addprefix $(obj),$(COBJS))
+
+all: $(LIB)
+
+$(LIB): $(obj).depend $(OBJS)
+ $(call cmd_link_o_target, $(OBJS))
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
--- /dev/null
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <common.h>
+#include <part.h>
+#include <ext4fs.h>
+#include <fat.h>
+#include <fs.h>
+
+static block_dev_desc_t *fs_dev_desc;
+static disk_partition_t fs_partition;
+static int fs_type = FS_TYPE_ANY;
+
+static inline int fs_ls_unsupported(const char *dirname)
+{
+ printf("** Unrecognized filesystem type **\n");
+ return -1;
+}
+
+static inline int fs_read_unsupported(const char *filename, ulong addr,
+ int offset, int len)
+{
+ printf("** Unrecognized filesystem type **\n");
+ return -1;
+}
+
+#ifdef CONFIG_FS_FAT
+static int fs_probe_fat(void)
+{
+ return fat_set_blk_dev(fs_dev_desc, &fs_partition);
+}
+
+static void fs_close_fat(void)
+{
+}
+
+#define fs_ls_fat file_fat_ls
+
+static int fs_read_fat(const char *filename, ulong addr, int offset, int len)
+{
+ int len_read;
+
+ len_read = file_fat_read_at(filename, offset,
+ (unsigned char *)addr, len);
+ if (len_read == -1) {
+ printf("** Unable to read file %s **\n", filename);
+ return -1;
+ }
+
+ return len_read;
+}
+#else
+static inline int fs_probe_fat(void)
+{
+ return -1;
+}
+
+static inline void fs_close_fat(void)
+{
+}
+
+#define fs_ls_fat fs_ls_unsupported
+#define fs_read_fat fs_read_unsupported
+#endif
+
+#ifdef CONFIG_FS_EXT4
+static int fs_probe_ext(void)
+{
+ ext4fs_set_blk_dev(fs_dev_desc, &fs_partition);
+
+ if (!ext4fs_mount(fs_partition.size)) {
+ ext4fs_close();
+ return -1;
+ }
+
+ return 0;
+}
+
+static void fs_close_ext(void)
+{
+ ext4fs_close();
+}
+
+#define fs_ls_ext ext4fs_ls
+
+static int fs_read_ext(const char *filename, ulong addr, int offset, int len)
+{
+ int file_len;
+ int len_read;
+
+ if (offset != 0) {
+ printf("** Cannot support non-zero offset **\n");
+ return -1;
+ }
+
+ file_len = ext4fs_open(filename);
+ if (file_len < 0) {
+ printf("** File not found %s **\n", filename);
+ ext4fs_close();
+ return -1;
+ }
+
+ if (len == 0)
+ len = file_len;
+
+ len_read = ext4fs_read((char *)addr, len);
+ ext4fs_close();
+
+ if (len_read != len) {
+ printf("** Unable to read file %s **\n", filename);
+ return -1;
+ }
+
+ return len_read;
+}
+#else
+static inline int fs_probe_ext(void)
+{
+ return -1;
+}
+
+static inline void fs_close_ext(void)
+{
+}
+
+#define fs_ls_ext fs_ls_unsupported
+#define fs_read_ext fs_read_unsupported
+#endif
+
+static const struct {
+ int fstype;
+ int (*probe)(void);
+} fstypes[] = {
+ {
+ .fstype = FS_TYPE_FAT,
+ .probe = fs_probe_fat,
+ },
+ {
+ .fstype = FS_TYPE_EXT,
+ .probe = fs_probe_ext,
+ },
+};
+
+int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype)
+{
+ int part, i;
+
+ part = get_device_and_partition(ifname, dev_part_str, &fs_dev_desc,
+ &fs_partition, 1);
+ if (part < 0)
+ return -1;
+
+ for (i = 0; i < ARRAY_SIZE(fstypes); i++) {
+ if ((fstype != FS_TYPE_ANY) && (fstype != fstypes[i].fstype))
+ continue;
+
+ if (!fstypes[i].probe()) {
+ fs_type = fstypes[i].fstype;
+ return 0;
+ }
+ }
+
+ printf("** Unrecognized filesystem type **\n");
+ return -1;
+}
+
+static void fs_close(void)
+{
+ switch (fs_type) {
+ case FS_TYPE_FAT:
+ fs_close_fat();
+ break;
+ case FS_TYPE_EXT:
+ fs_close_ext();
+ break;
+ default:
+ break;
+ }
+
+ fs_type = FS_TYPE_ANY;
+}
+
+int fs_ls(const char *dirname)
+{
+ int ret;
+
+ switch (fs_type) {
+ case FS_TYPE_FAT:
+ ret = fs_ls_fat(dirname);
+ break;
+ case FS_TYPE_EXT:
+ ret = fs_ls_ext(dirname);
+ break;
+ default:
+ ret = fs_ls_unsupported(dirname);
+ break;
+ }
+
+ fs_close();
+
+ return ret;
+}
+
+int fs_read(const char *filename, ulong addr, int offset, int len)
+{
+ int ret;
+
+ switch (fs_type) {
+ case FS_TYPE_FAT:
+ ret = fs_read_fat(filename, addr, offset, len);
+ break;
+ case FS_TYPE_EXT:
+ ret = fs_read_ext(filename, addr, offset, len);
+ break;
+ default:
+ ret = fs_read_unsupported(filename, addr, offset, len);
+ break;
+ }
+
+ fs_close();
+
+ return ret;
+}
+
+int do_fsload(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+ int fstype)
+{
+ unsigned long addr;
+ const char *addr_str;
+ const char *filename;
+ unsigned long bytes;
+ unsigned long pos;
+ int len_read;
+ char buf[12];
+
+ if (argc < 5)
+ return CMD_RET_USAGE;
+
+ if (fs_set_blk_dev(argv[1], argv[2], fstype))
+ return 1;
+
+ if (argc >= 4) {
+ addr = simple_strtoul(argv[3], NULL, 0);
+ } else {
+ addr_str = getenv("loadaddr");
+ if (addr_str != NULL)
+ addr = simple_strtoul(addr_str, NULL, 16);
+ else
+ addr = CONFIG_SYS_LOAD_ADDR;
+ }
+ if (argc >= 5) {
+ filename = argv[4];
+ } else {
+ filename = getenv("bootfile");
+ if (!filename) {
+ puts("** No boot file defined **\n");
+ return 1;
+ }
+ }
+ if (argc >= 6)
+ bytes = simple_strtoul(argv[5], NULL, 0);
+ else
+ bytes = 0;
+ if (argc >= 7)
+ pos = simple_strtoul(argv[6], NULL, 0);
+ else
+ pos = 0;
+
+ len_read = fs_read(filename, addr, pos, bytes);
+ if (len_read <= 0)
+ return 1;
+
+ printf("%d bytes read\n", len_read);
+
+ sprintf(buf, "0x%x", len_read);
+ setenv("filesize", buf);
+
+ return 0;
+}
+
+int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+ int fstype)
+{
+ if (argc < 2)
+ return CMD_RET_USAGE;
+
+ if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
+ return 1;
+
+ if (fs_ls(argc == 4 ? argv[3] : "/"))
+ return 1;
+
+ return 0;
+}
int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]);
int do_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc,
char *const argv[]);
-int do_ext_load(cmd_tbl_t *cmdtp, int flag, int argc,
- char *const argv[]);
-int do_ext_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]);
#endif
--- /dev/null
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _FS_H
+#define _FS_H
+
+#include <common.h>
+
+#define FS_TYPE_ANY 0
+#define FS_TYPE_FAT 1
+#define FS_TYPE_EXT 2
+
+/*
+ * Tell the fs layer which block device an partition to use for future
+ * commands. This also internally identifies the filesystem that is present
+ * within the partition. The identification process may be limited to a
+ * specific filesystem type by passing FS_* in the fstype parameter.
+ *
+ * Returns 0 on success.
+ * Returns non-zero if there is an error accessing the disk or partition, or
+ * no known filesystem type could be recognized on it.
+ */
+int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype);
+
+/*
+ * Print the list of files on the partition previously set by fs_set_blk_dev(),
+ * in directory "dirname".
+ *
+ * Returns 0 on success. Returns non-zero on error.
+ */
+int fs_ls(const char *dirname);
+
+/*
+ * Read file "filename" from the partition previously set by fs_set_blk_dev(),
+ * to address "addr", starting at byte offset "offset", and reading "len"
+ * bytes. "offset" may be 0 to read from the start of the file. "len" may be
+ * 0 to read the entire file. Note that not all filesystem types support
+ * either/both offset!=0 or len!=0.
+ *
+ * Returns number of bytes read on success. Returns <= 0 on error.
+ */
+int fs_read(const char *filename, ulong addr, int offset, int len);
+
+/*
+ * Common implementation for various filesystem commands, optionally limited
+ * to a specific filesystem type via the fstype parameter.
+ */
+int do_fsload(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+ int fstype);
+int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+ int fstype);
+
+#endif /* _FS_H */
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