1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/*
Managed Flash Storage - Copyright (C) 2016 Giovanni Di Sirio
This file is part of ChibiOS.
ChibiOS 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 3 of the License, or
(at your option) any later version.
ChibiOS 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, see <http://www.gnu.org/licenses/>.
*/
/**
* @file mfs.h
* @brief Managed Flash Storage module header.
*
* @{
*/
#ifndef MFS_H
#define MFS_H
#include "hal_flash.h"
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @name Configuration options
* @{
*/
/** @} */
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief Type of driver state machine states.
*/
typedef enum {
MFS_UNINIT = 0,
MFS_STOP = 1,
MFS_READY = 2,
MFS_MOUNTED = 3,
MFS_ACTIVE = 4
} mfs_state_t;
/**
* @brief Type of an MFS error code.
* @note Errors are negative integers, informative warnings are positive
* integers.
*/
typedef enum {
MFS_NOERROR = 0,
MFS_REPAIR_WARNING = 1,
MFS_GC_WARNING = 2,
MFS_ID_NOT_FOUND = -1,
MFS_CRC_ERROR = -2,
MFS_FLASH_FAILURE = -3
} mfs_error_t;
/**
* @brief Type of a bank header.
* @note The header resides in the first 16 bytes of a bank extending
* to the next page boundary.
*/
typedef struct {
/**
* @brief Bank magic 1.
*/
uint32_t magic1;
/**
* @brief Bank magic 2.
*/
uint32_t magic2;
/**
* @brief Usage counter of the bank.
*/
uint32_t counter;
/**
* @brief First data element.
*/
flash_address_t next;
} mfs_bank_header_t;
/**
* @brief Type of a data block header.
*/
typedef union {
struct {
/**
* @brief Data header magic.
*/
uint32_t magic;
/**
* @brief Data identifier.
*/
uint32_t id;
/**
* @brief Data size.
*/
uint32_t size;
/**
* @brief Data CRC.
*/
uint32_t crc;
} fields;
uint8_t h8[16];
uint32_t h32[4];
} mfs_data_header_t;
/**
* @brief Type of a MFS configuration structure.
*/
typedef struct {
/**
* @brief Flash driver associated to this MFS instance.
*/
BaseFlash *flashp;
/**
* @brief Base sector index for bank 0.
*/
flash_sector_t bank0_start;
/**
* #brief Number of sectors for bank 0.
*/
flash_sector_t bank0_sectors;
/**
* @brief Base sector index for bank 1.
*/
flash_sector_t bank1_start;
/**
* #brief Number of sectors for bank 1.
*/
flash_sector_t bank1_sectors;
} MFSConfig;
/**
* @extends BaseFlash
*
* @brief Type of an MFS instance.
*/
typedef struct {
/**
* @brief Driver state.
*/
mfs_state_t state;
/**
* @brief Current configuration data.
*/
const MFSConfig *config;
} MFSDriver;
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
void mfsObjectInit(MFSDriver *devp);
void mfsStart(MFSDriver *devp, const MFSConfig *config);
void mfsStop(MFSDriver *devp);
mfs_error_t mfsMount(MFSDriver *devp);
mfs_error_t mfsUnmount(MFSDriver *devp);
mfs_error_t mfsReadRecord(MFSDriver *devp, uint32_t id,
uint32_t *np, uint8_t *buffer);
mfs_error_t mfsUpdateRecord(MFSDriver *devp, uint32_t id,
uint32_t n, const uint8_t *buffer);
mfs_error_t mfsEraseRecord(MFSDriver *devp, uint32_t id);
#ifdef __cplusplus
}
#endif
#endif /* MFS_H */
/** @} */
|