2
* Copyright Ā© 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
* @MTD_OPS_PLACE_OOB: OOB data are placed at the given offset (default)
52
* @MTD_OPS_AUTO_OOB: OOB data are automatically placed at the free areas
53
* which are defined by the internal ecclayout
54
* @MTD_OPS_RAW: data are transferred as-is, with no error correction;
55
* this mode implies %MTD_OPS_PLACE_OOB
57
* These modes can be passed to ioctl(MEMWRITE) and are also used internally.
58
* See notes on "MTD file modes" for discussion on %MTD_OPS_RAW vs.
62
MTD_OPS_PLACE_OOB = 0,
68
* struct mtd_write_req - data structure for requesting a write operation
70
* @start: start address
71
* @len: length of data buffer
72
* @ooblen: length of OOB buffer
73
* @usr_data: user-provided data buffer
74
* @usr_oob: user-provided OOB buffer
75
* @mode: MTD mode (see "MTD operation modes")
76
* @padding: reserved, must be set to 0
78
* This structure supports ioctl(MEMWRITE) operations, allowing data and/or OOB
79
* writes in various modes. To write to OOB-only, set @usr_data == NULL, and to
80
* write data-only, set @usr_oob == NULL. However, setting both @usr_data and
81
* @usr_oob to NULL is not allowed.
83
struct mtd_write_req {
96
#define MTD_NORFLASH 3
97
#define MTD_NANDFLASH 4
98
#define MTD_DATAFLASH 6
99
#define MTD_UBIVOLUME 7
100
#define MTD_MLCNANDFLASH 8
102
#define MTD_WRITEABLE 0x400 /* Device is writeable */
103
#define MTD_BIT_WRITEABLE 0x800 /* Single bits can be flipped */
104
#define MTD_NO_ERASE 0x1000 /* No erase necessary */
105
#define MTD_POWERUP_LOCK 0x2000 /* Always locked after reset */
107
/* Some common devices / combinations of capabilities */
108
#define MTD_CAP_ROM 0
109
#define MTD_CAP_RAM (MTD_WRITEABLE | MTD_BIT_WRITEABLE | MTD_NO_ERASE)
110
#define MTD_CAP_NORFLASH (MTD_WRITEABLE | MTD_BIT_WRITEABLE)
111
#define MTD_CAP_NANDFLASH (MTD_WRITEABLE)
113
/* Obsolete ECC byte placement modes (used with obsolete MEMGETOOBSEL) */
114
#define MTD_NANDECC_OFF 0 // Switch off ECC (Not recommended)
115
#define MTD_NANDECC_PLACE 1 // Use the given placement in the structure (YAFFS1 legacy mode)
116
#define MTD_NANDECC_AUTOPLACE 2 // Use the default placement scheme
117
#define MTD_NANDECC_PLACEONLY 3 // Use the given placement in the structure (Do not store ecc result on read)
118
#define MTD_NANDECC_AUTOPL_USR 4 // Use the given autoplacement scheme rather than using the default
120
/* OTP mode selection */
121
#define MTD_OTP_OFF 0
122
#define MTD_OTP_FACTORY 1
123
#define MTD_OTP_USER 2
125
struct mtd_info_user {
128
__u32 size; /* Total size of the MTD */
131
__u32 oobsize; /* Amount of OOB data per block (e.g. 16) */
132
__u64 padding; /* Old obsolete field; do not use */
135
struct region_info_user {
136
__u32 offset; /* At which this region starts,
137
* from the beginning of the MTD */
138
__u32 erasesize; /* For this region */
139
__u32 numblocks; /* Number of blocks in this region */
150
* Note, the following ioctl existed in the past and was removed:
151
* #define MEMSETOOBSEL _IOW('M', 9, struct nand_oobinfo)
152
* Try to avoid adding a new ioctl with the same ioctl number.
155
/* Get basic MTD characteristics info (better to use sysfs) */
156
#define MEMGETINFO _IOR('M', 1, struct mtd_info_user)
157
/* Erase segment of MTD */
158
#define MEMERASE _IOW('M', 2, struct erase_info_user)
159
/* Write out-of-band data from MTD */
160
#define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf)
161
/* Read out-of-band data from MTD */
162
#define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf)
163
/* Lock a chip (for MTD that supports it) */
164
#define MEMLOCK _IOW('M', 5, struct erase_info_user)
165
/* Unlock a chip (for MTD that supports it) */
166
#define MEMUNLOCK _IOW('M', 6, struct erase_info_user)
167
/* Get the number of different erase regions */
168
#define MEMGETREGIONCOUNT _IOR('M', 7, int)
169
/* Get information about the erase region for a specific index */
170
#define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user)
171
/* Get info about OOB modes (e.g., RAW, PLACE, AUTO) - legacy interface */
172
#define MEMGETOOBSEL _IOR('M', 10, struct nand_oobinfo)
173
/* Check if an eraseblock is bad */
174
#define MEMGETBADBLOCK _IOW('M', 11, __kernel_loff_t)
175
/* Mark an eraseblock as bad */
176
#define MEMSETBADBLOCK _IOW('M', 12, __kernel_loff_t)
177
/* Set OTP (One-Time Programmable) mode (factory vs. user) */
178
#define OTPSELECT _IOR('M', 13, int)
179
/* Get number of OTP (One-Time Programmable) regions */
180
#define OTPGETREGIONCOUNT _IOW('M', 14, int)
181
/* Get all OTP (One-Time Programmable) info about MTD */
182
#define OTPGETREGIONINFO _IOW('M', 15, struct otp_info)
183
/* Lock a given range of user data (must be in mode %MTD_FILE_MODE_OTP_USER) */
184
#define OTPLOCK _IOR('M', 16, struct otp_info)
185
/* Get ECC layout (deprecated) */
186
#define ECCGETLAYOUT _IOR('M', 17, struct nand_ecclayout_user)
187
/* Get statistics about corrected/uncorrected errors */
188
#define ECCGETSTATS _IOR('M', 18, struct mtd_ecc_stats)
189
/* Set MTD mode on a per-file-descriptor basis (see "MTD file modes") */
190
#define MTDFILEMODE _IO('M', 19)
191
/* Erase segment of MTD (supports 64-bit address) */
192
#define MEMERASE64 _IOW('M', 20, struct erase_info_user64)
193
/* Write data to OOB (64-bit version) */
194
#define MEMWRITEOOB64 _IOWR('M', 21, struct mtd_oob_buf64)
195
/* Read data from OOB (64-bit version) */
196
#define MEMREADOOB64 _IOWR('M', 22, struct mtd_oob_buf64)
197
/* Check if chip is locked (for MTD that supports it) */
198
#define MEMISLOCKED _IOR('M', 23, struct erase_info_user)
200
* Most generic write interface; can write in-band and/or out-of-band in various
201
* modes (see "struct mtd_write_req")
203
#define MEMWRITE _IOWR('M', 24, struct mtd_write_req)
206
* Obsolete legacy interface. Keep it in order not to break userspace
209
struct nand_oobinfo {
216
struct nand_oobfree {
221
#define MTD_MAX_OOBFREE_ENTRIES 8
222
#define MTD_MAX_ECCPOS_ENTRIES 64
224
* OBSOLETE: ECC layout control structure. Exported to user-space via ioctl
225
* ECCGETLAYOUT for backwards compatbility and should not be mistaken as a
226
* complete set of ECC information. The ioctl truncates the larger internal
227
* structure to retain binary compatibility with the static declaration of the
228
* ioctl. Note that the "MTD_MAX_..._ENTRIES" macros represent the max size of
229
* the user struct, not the MAX size of the internal struct nand_ecclayout.
231
struct nand_ecclayout_user {
233
__u32 eccpos[MTD_MAX_ECCPOS_ENTRIES];
235
struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES];
239
* struct mtd_ecc_stats - error correction stats
241
* @corrected: number of corrected bits
242
* @failed: number of uncorrectable errors
243
* @badblocks: number of bad blocks in this partition
244
* @bbtblocks: number of blocks reserved for bad block tables
246
struct mtd_ecc_stats {
254
* MTD file modes - for read/write access to MTD
256
* @MTD_FILE_MODE_NORMAL: OTP disabled, ECC enabled
257
* @MTD_FILE_MODE_OTP_FACTORY: OTP enabled in factory mode
258
* @MTD_FILE_MODE_OTP_USER: OTP enabled in user mode
259
* @MTD_FILE_MODE_RAW: OTP disabled, ECC disabled
261
* These modes can be set via ioctl(MTDFILEMODE). The mode mode will be retained
262
* separately for each open file descriptor.
264
* Note: %MTD_FILE_MODE_RAW provides the same functionality as %MTD_OPS_RAW -
265
* raw access to the flash, without error correction or autoplacement schemes.
266
* Wherever possible, the MTD_OPS_* mode will override the MTD_FILE_MODE_* mode
267
* (e.g., when using ioctl(MEMWRITE)), but in some cases, the MTD_FILE_MODE is
268
* used out of necessity (e.g., `write()', ioctl(MEMWRITEOOB64)).
270
enum mtd_file_modes {
271
MTD_FILE_MODE_NORMAL = MTD_OTP_OFF,
272
MTD_FILE_MODE_OTP_FACTORY = MTD_OTP_FACTORY,
273
MTD_FILE_MODE_OTP_USER = MTD_OTP_USER,
277
#endif /* __MTD_ABI_H__ */