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1 | /* |
2 | * Portions of MTD ABI definition which are shared by kernel and user space |
3 | */ |
4 | |
5 | #ifndef __MTD_ABI_H__ |
6 | #define __MTD_ABI_H__ |
7 | |
8 | #include <linux/types.h> |
9 | |
10 | struct erase_info_user { |
11 | __u32 start; |
12 | __u32 length; |
13 | }; |
14 | |
15 | struct erase_info_user64 { |
16 | __u64 start; |
17 | __u64 length; |
18 | }; |
19 | |
20 | struct mtd_oob_buf { |
21 | __u32 start; |
22 | __u32 length; |
23 | unsigned char __user *ptr; |
24 | }; |
25 | |
26 | struct mtd_oob_buf64 { |
27 | __u64 start; |
28 | __u32 pad; |
29 | __u32 length; |
30 | __u64 usr_ptr; |
31 | }; |
32 | |
33 | #define MTD_ABSENT 0 |
34 | #define MTD_RAM 1 |
35 | #define MTD_ROM 2 |
36 | #define MTD_NORFLASH 3 |
37 | #define MTD_NANDFLASH 4 |
38 | #define MTD_DATAFLASH 6 |
39 | #define MTD_UBIVOLUME 7 |
40 | |
41 | #define MTD_WRITEABLE 0x400 /* Device is writeable */ |
42 | #define MTD_BIT_WRITEABLE 0x800 /* Single bits can be flipped */ |
43 | #define MTD_NO_ERASE 0x1000 /* No erase necessary */ |
44 | #define MTD_POWERUP_LOCK 0x2000 /* Always locked after reset */ |
45 | |
46 | // Some common devices / combinations of capabilities |
47 | #define MTD_CAP_ROM 0 |
48 | #define MTD_CAP_RAM (MTD_WRITEABLE | MTD_BIT_WRITEABLE | MTD_NO_ERASE) |
49 | #define MTD_CAP_NORFLASH (MTD_WRITEABLE | MTD_BIT_WRITEABLE) |
50 | #define MTD_CAP_NANDFLASH (MTD_WRITEABLE) |
51 | |
52 | /* ECC byte placement */ |
53 | #define MTD_NANDECC_OFF 0 // Switch off ECC (Not recommended) |
54 | #define MTD_NANDECC_PLACE 1 // Use the given placement in the structure (YAFFS1 legacy mode) |
55 | #define MTD_NANDECC_AUTOPLACE 2 // Use the default placement scheme |
56 | #define MTD_NANDECC_PLACEONLY 3 // Use the given placement in the structure (Do not store ecc result on read) |
57 | #define MTD_NANDECC_AUTOPL_USR 4 // Use the given autoplacement scheme rather than using the default |
58 | |
59 | /* OTP mode selection */ |
60 | #define MTD_OTP_OFF 0 |
61 | #define MTD_OTP_FACTORY 1 |
62 | #define MTD_OTP_USER 2 |
63 | |
64 | struct mtd_info_user { |
65 | __u8 type; |
66 | __u32 flags; |
67 | __u32 size; // Total size of the MTD |
68 | __u32 erasesize; |
69 | __u32 writesize; |
70 | __u32 oobsize; // Amount of OOB data per block (e.g. 16) |
71 | /* The below two fields are obsolete and broken, do not use them |
72 | * (TODO: remove at some point) */ |
73 | __u32 ecctype; |
74 | __u32 eccsize; |
75 | }; |
76 | |
77 | struct region_info_user { |
78 | __u32 offset; /* At which this region starts, |
79 | * from the beginning of the MTD */ |
80 | __u32 erasesize; /* For this region */ |
81 | __u32 numblocks; /* Number of blocks in this region */ |
82 | __u32 regionindex; |
83 | }; |
84 | |
85 | struct otp_info { |
86 | __u32 start; |
87 | __u32 length; |
88 | __u32 locked; |
89 | }; |
90 | |
91 | #define MEMGETINFO _IOR('M', 1, struct mtd_info_user) |
92 | #define MEMERASE _IOW('M', 2, struct erase_info_user) |
93 | #define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf) |
94 | #define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf) |
95 | #define MEMLOCK _IOW('M', 5, struct erase_info_user) |
96 | #define MEMUNLOCK _IOW('M', 6, struct erase_info_user) |
97 | #define MEMGETREGIONCOUNT _IOR('M', 7, int) |
98 | #define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user) |
99 | #define MEMSETOOBSEL _IOW('M', 9, struct nand_oobinfo) |
100 | #define MEMGETOOBSEL _IOR('M', 10, struct nand_oobinfo) |
101 | #define MEMGETBADBLOCK _IOW('M', 11, __kernel_loff_t) |
102 | #define MEMSETBADBLOCK _IOW('M', 12, __kernel_loff_t) |
103 | #define OTPSELECT _IOR('M', 13, int) |
104 | #define OTPGETREGIONCOUNT _IOW('M', 14, int) |
105 | #define OTPGETREGIONINFO _IOW('M', 15, struct otp_info) |
106 | #define OTPLOCK _IOR('M', 16, struct otp_info) |
107 | #define ECCGETLAYOUT _IOR('M', 17, struct nand_ecclayout) |
108 | #define ECCGETSTATS _IOR('M', 18, struct mtd_ecc_stats) |
109 | #define MTDFILEMODE _IO('M', 19) |
110 | #define MEMERASE64 _IOW('M', 20, struct erase_info_user64) |
111 | #define MEMWRITEOOB64 _IOWR('M', 21, struct mtd_oob_buf64) |
112 | #define MEMREADOOB64 _IOWR('M', 22, struct mtd_oob_buf64) |
113 | |
114 | /* |
115 | * Obsolete legacy interface. Keep it in order not to break userspace |
116 | * interfaces |
117 | */ |
118 | struct nand_oobinfo { |
119 | __u32 useecc; |
120 | __u32 eccbytes; |
121 | __u32 oobfree[8][2]; |
122 | __u32 eccpos[32]; |
123 | }; |
124 | |
125 | struct nand_oobfree { |
126 | __u32 offset; |
127 | __u32 length; |
128 | }; |
129 | |
130 | #define MTD_MAX_OOBFREE_ENTRIES 8 |
131 | /* |
132 | * ECC layout control structure. Exported to userspace for |
133 | * diagnosis and to allow creation of raw images |
134 | */ |
135 | struct nand_ecclayout { |
136 | __u32 eccbytes; |
137 | __u32 eccpos[72]; |
138 | __u32 oobavail; |
139 | struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES]; |
140 | }; |
141 | |
142 | /** |
143 | * struct mtd_ecc_stats - error correction stats |
144 | * |
145 | * @corrected: number of corrected bits |
146 | * @failed: number of uncorrectable errors |
147 | * @badblocks: number of bad blocks in this partition |
148 | * @bbtblocks: number of blocks reserved for bad block tables |
149 | */ |
150 | struct mtd_ecc_stats { |
151 | __u32 corrected; |
152 | __u32 failed; |
153 | __u32 badblocks; |
154 | __u32 bbtblocks; |
155 | }; |
156 | |
157 | /* |
158 | * Read/write file modes for access to MTD |
159 | */ |
160 | enum mtd_file_modes { |
161 | MTD_MODE_NORMAL = MTD_OTP_OFF, |
162 | MTD_MODE_OTP_FACTORY = MTD_OTP_FACTORY, |
163 | MTD_MODE_OTP_USER = MTD_OTP_USER, |
164 | MTD_MODE_RAW, |
165 | }; |
166 | |
167 | #endif /* __MTD_ABI_H__ */ |
168 |
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