2 * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org> et al.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 #include <linux/types.h>
25 struct erase_info_user
{
30 struct erase_info_user64
{
38 unsigned char __user
*ptr
;
41 struct mtd_oob_buf64
{
51 #define MTD_NORFLASH 3
52 #define MTD_NANDFLASH 4
53 #define MTD_DATAFLASH 6
54 #define MTD_UBIVOLUME 7
56 #define MTD_WRITEABLE 0x400 /* Device is writeable */
57 #define MTD_BIT_WRITEABLE 0x800 /* Single bits can be flipped */
58 #define MTD_NO_ERASE 0x1000 /* No erase necessary */
59 #define MTD_POWERUP_LOCK 0x2000 /* Always locked after reset */
61 // Some common devices / combinations of capabilities
63 #define MTD_CAP_RAM (MTD_WRITEABLE | MTD_BIT_WRITEABLE | MTD_NO_ERASE)
64 #define MTD_CAP_NORFLASH (MTD_WRITEABLE | MTD_BIT_WRITEABLE)
65 #define MTD_CAP_NANDFLASH (MTD_WRITEABLE)
67 /* ECC byte placement */
68 #define MTD_NANDECC_OFF 0 // Switch off ECC (Not recommended)
69 #define MTD_NANDECC_PLACE 1 // Use the given placement in the structure (YAFFS1 legacy mode)
70 #define MTD_NANDECC_AUTOPLACE 2 // Use the default placement scheme
71 #define MTD_NANDECC_PLACEONLY 3 // Use the given placement in the structure (Do not store ecc result on read)
72 #define MTD_NANDECC_AUTOPL_USR 4 // Use the given autoplacement scheme rather than using the default
74 /* OTP mode selection */
76 #define MTD_OTP_FACTORY 1
77 #define MTD_OTP_USER 2
79 struct mtd_info_user
{
82 __u32 size
; // Total size of the MTD
85 __u32 oobsize
; // Amount of OOB data per block (e.g. 16)
86 /* The below two fields are obsolete and broken, do not use them
87 * (TODO: remove at some point) */
92 struct region_info_user
{
93 __u32 offset
; /* At which this region starts,
94 * from the beginning of the MTD */
95 __u32 erasesize
; /* For this region */
96 __u32 numblocks
; /* Number of blocks in this region */
106 #define MEMGETINFO _IOR('M', 1, struct mtd_info_user)
107 #define MEMERASE _IOW('M', 2, struct erase_info_user)
108 #define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf)
109 #define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf)
110 #define MEMLOCK _IOW('M', 5, struct erase_info_user)
111 #define MEMUNLOCK _IOW('M', 6, struct erase_info_user)
112 #define MEMGETREGIONCOUNT _IOR('M', 7, int)
113 #define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user)
114 #define MEMSETOOBSEL _IOW('M', 9, struct nand_oobinfo)
115 #define MEMGETOOBSEL _IOR('M', 10, struct nand_oobinfo)
116 #define MEMGETBADBLOCK _IOW('M', 11, __kernel_loff_t)
117 #define MEMSETBADBLOCK _IOW('M', 12, __kernel_loff_t)
118 #define OTPSELECT _IOR('M', 13, int)
119 #define OTPGETREGIONCOUNT _IOW('M', 14, int)
120 #define OTPGETREGIONINFO _IOW('M', 15, struct otp_info)
121 #define OTPLOCK _IOR('M', 16, struct otp_info)
122 #define ECCGETLAYOUT _IOR('M', 17, struct nand_ecclayout)
123 #define ECCGETSTATS _IOR('M', 18, struct mtd_ecc_stats)
124 #define MTDFILEMODE _IO('M', 19)
125 #define MEMERASE64 _IOW('M', 20, struct erase_info_user64)
126 #define MEMWRITEOOB64 _IOWR('M', 21, struct mtd_oob_buf64)
127 #define MEMREADOOB64 _IOWR('M', 22, struct mtd_oob_buf64)
128 #define MEMISLOCKED _IOR('M', 23, struct erase_info_user)
131 * Obsolete legacy interface. Keep it in order not to break userspace
134 struct nand_oobinfo
{
141 struct nand_oobfree
{
146 #define MTD_MAX_OOBFREE_ENTRIES 8
148 * ECC layout control structure. Exported to userspace for
149 * diagnosis and to allow creation of raw images
151 struct nand_ecclayout
{
155 struct nand_oobfree oobfree
[MTD_MAX_OOBFREE_ENTRIES
];
159 * struct mtd_ecc_stats - error correction stats
161 * @corrected: number of corrected bits
162 * @failed: number of uncorrectable errors
163 * @badblocks: number of bad blocks in this partition
164 * @bbtblocks: number of blocks reserved for bad block tables
166 struct mtd_ecc_stats
{
174 * Read/write file modes for access to MTD
176 enum mtd_file_modes
{
177 MTD_MODE_NORMAL
= MTD_OTP_OFF
,
178 MTD_MODE_OTP_FACTORY
= MTD_OTP_FACTORY
,
179 MTD_MODE_OTP_USER
= MTD_OTP_USER
,
183 #endif /* __MTD_ABI_H__ */