1 /*
2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this list of
9 * conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
12 * of conditions and the following disclaimer in the documentation and/or other materials
13 * provided with the distribution.
14 *
15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
16 * to endorse or promote products derived from this software without specific prior written
17 * permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <string.h>
33 #include "los_memory.h"
34 #include "lfs_rambd.h"
35 #include "lfs.h"
36
37 #define READ_SIZE 16
38 #define PROG_SIZE 16
39 #define BLOCK_SIZE 256
40 #define BLOCK_COUNT 128
41 #define CACHE_SIZE 16
42 #define LOOKAHEAD_SIZE 16
43 #define BLOCK_CYCLES 500
44
LittlefsRead(const struct lfs_config *cfg, lfs_block_t block, lfs_off_t off, void *buffer, lfs_size_t size)45 static int LittlefsRead(const struct lfs_config *cfg, lfs_block_t block,
46 lfs_off_t off, void *buffer, lfs_size_t size)
47 {
48 (void)lfs_rambd_read(cfg, block, off, buffer, size);
49
50 return LFS_ERR_OK;
51 }
52
LittlefsProg(const struct lfs_config *cfg, lfs_block_t block, lfs_off_t off, const void *buffer, lfs_size_t size)53 static int LittlefsProg(const struct lfs_config *cfg, lfs_block_t block,
54 lfs_off_t off, const void *buffer, lfs_size_t size)
55 {
56 (void)lfs_rambd_prog(cfg, block, off, buffer, size);
57
58 return LFS_ERR_OK;
59 }
60
LittlefsErase(const struct lfs_config *cfg, lfs_block_t block)61 static int LittlefsErase(const struct lfs_config *cfg, lfs_block_t block)
62 {
63 (void)lfs_rambd_erase(cfg, block);
64
65 return LFS_ERR_OK;
66 }
67
LittlefsSync(const struct lfs_config *cfg)68 static int LittlefsSync(const struct lfs_config *cfg)
69 {
70 return LFS_ERR_OK;
71 }
72
73 static struct lfs_config g_lfsConfig = {
74 // block device operations
75 .context = NULL,
76 .read = LittlefsRead,
77 .prog = LittlefsProg,
78 .erase = LittlefsErase,
79 .sync = LittlefsSync,
80
81 // block device configuration
82 .read_size = READ_SIZE,
83 .prog_size = PROG_SIZE,
84 .block_size = BLOCK_SIZE,
85 .block_count = BLOCK_COUNT,
86 .cache_size = CACHE_SIZE,
87 .lookahead_size = LOOKAHEAD_SIZE,
88 .block_cycles = BLOCK_CYCLES,
89 .read_buffer = NULL,
90 .prog_buffer = NULL,
91 .lookahead_buffer = NULL
92 };
93
LittlefsDriverInit(int needErase)94 void LittlefsDriverInit(int needErase)
95 {
96 lfs_rambd_t *bd = (lfs_rambd_t *)LOS_MemAlloc(m_aucSysMem0, sizeof(lfs_rambd_t));
97 (void)memset_s(bd, sizeof(lfs_rambd_t), 0, sizeof(lfs_rambd_t));
98 g_lfsConfig.context = bd;
99 (void)lfs_rambd_create(&g_lfsConfig);
100 }
101
LittlefsConfigGet(void)102 struct lfs_config* LittlefsConfigGet(void)
103 {
104 return &g_lfsConfig;
105 }
106