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The Android Open Source Projectc24a8e62009-03-03 19:28:42 -08001/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef MTDUTILS_H_
18#define MTDUTILS_H_
19
20#include <sys/types.h> // for size_t, etc.
21
22typedef struct MtdPartition MtdPartition;
23
24int mtd_scan_partitions(void);
25
26const MtdPartition *mtd_find_partition_by_name(const char *name);
27
28/* mount_point is like "/system"
29 * filesystem is like "yaffs2"
30 */
31int mtd_mount_partition(const MtdPartition *partition, const char *mount_point,
32 const char *filesystem, int read_only);
33
34/* get the partition and the minimum erase/write block size. NULL is ok.
35 */
36int mtd_partition_info(const MtdPartition *partition,
37 size_t *total_size, size_t *erase_size, size_t *write_size);
38
39/* read or write raw data from a partition, starting at the beginning.
40 * skips bad blocks as best we can.
41 */
42typedef struct MtdReadContext MtdReadContext;
43typedef struct MtdWriteContext MtdWriteContext;
44
45MtdReadContext *mtd_read_partition(const MtdPartition *);
46ssize_t mtd_read_data(MtdReadContext *, char *data, size_t data_len);
47void mtd_read_close(MtdReadContext *);
48
49MtdWriteContext *mtd_write_partition(const MtdPartition *);
50ssize_t mtd_write_data(MtdWriteContext *, const char *data, size_t data_len);
51off_t mtd_erase_blocks(MtdWriteContext *, int blocks); /* 0 ok, -1 for all */
52int mtd_write_close(MtdWriteContext *);
53
54#endif // MTDUTILS_H_