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 <stdio.h>
33 #include <string.h>
34 #include "los_memory.h"
35 #include "lfs_rambd.h"
36 #include "lfs.h"
37
38 #define LITTLEFS_PHYS_ADDR 0x00
39 #define LITTLEFS_PHYS_SIZE (64 * 1024)
40
41 #define READ_SIZE 16
42 #define PROG_SIZE 16
43 #define BLOCK_SIZE 256
44 #define BLOCK_COUNT 128
45 #define CACHE_SIZE 16
46 #define LOOKAHEAD_SIZE 16
47 #define BLOCK_CYCLES 500
48
LittlefsRead(const struct lfs_config * cfg,lfs_block_t block,lfs_off_t off,void * buffer,lfs_size_t size)49 static int LittlefsRead(const struct lfs_config *cfg, lfs_block_t block,
50 lfs_off_t off, void *buffer, lfs_size_t size)
51 {
52 (void)lfs_rambd_read(cfg, block, off, buffer, size);
53
54 return LFS_ERR_OK;
55 }
56
LittlefsProg(const struct lfs_config * cfg,lfs_block_t block,lfs_off_t off,const void * buffer,lfs_size_t size)57 static int LittlefsProg(const struct lfs_config *cfg, lfs_block_t block,
58 lfs_off_t off, const void *buffer, lfs_size_t size)
59 {
60 (void)lfs_rambd_prog(cfg, block, off, buffer, size);
61
62 return LFS_ERR_OK;
63 }
64
LittlefsErase(const struct lfs_config * cfg,lfs_block_t block)65 static int LittlefsErase(const struct lfs_config *cfg, lfs_block_t block)
66 {
67 (void)lfs_rambd_erase(cfg, block);
68
69 return LFS_ERR_OK;
70 }
71
LittlefsSync(const struct lfs_config * cfg)72 static int LittlefsSync(const struct lfs_config *cfg)
73 {
74 return LFS_ERR_OK;
75 }
76
77 static struct lfs_config g_lfsConfig = {
78 // block device operations
79 .context = NULL,
80 .read = LittlefsRead,
81 .prog = LittlefsProg,
82 .erase = LittlefsErase,
83 .sync = LittlefsSync,
84
85 // block device configuration
86 .read_size = READ_SIZE,
87 .prog_size = PROG_SIZE,
88 .block_size = BLOCK_SIZE,
89 .block_count = BLOCK_COUNT,
90 .cache_size = CACHE_SIZE,
91 .lookahead_size = LOOKAHEAD_SIZE,
92 .block_cycles = BLOCK_CYCLES,
93 .read_buffer = NULL,
94 .prog_buffer = NULL,
95 .lookahead_buffer = NULL
96 };
97
LittlefsDriverInit(int needErase)98 void LittlefsDriverInit(int needErase)
99 {
100 lfs_rambd_t *bd = (lfs_rambd_t *)LOS_MemAlloc(m_aucSysMem0, sizeof(lfs_rambd_t));
101 (void)memset_s(bd, sizeof(lfs_rambd_t), 0, sizeof(lfs_rambd_t));
102 g_lfsConfig.context = bd;
103 (void)lfs_rambd_create(&g_lfsConfig);
104 }
105
LittlefsConfigGet(void)106 struct lfs_config* LittlefsConfigGet(void)
107 {
108 return &g_lfsConfig;
109 }
110