tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * $Id: mtd-abi.h,v 1.11 2005/05/19 16:08:58 gleixner Exp $
3 *
4 * Portions of MTD ABI definition which are shared by kernel and user space
5 */
6
7#ifndef __MTD_ABI_H__
8#define __MTD_ABI_H__
9
10#ifndef __KERNEL__ /* Urgh. The whole point of splitting this out into
11 separate files was to avoid #ifdef __KERNEL__ */
12#define __user
13#endif
14
15struct erase_info_user {
16 uint32_t start;
17 uint32_t length;
18};
19
20struct mtd_oob_buf {
21 uint32_t start;
22 uint32_t length;
23 unsigned char __user *ptr;
24};
25
26#define MTD_ABSENT 0
27#define MTD_RAM 1
28#define MTD_ROM 2
29#define MTD_NORFLASH 3
30#define MTD_NANDFLASH 4
31#define MTD_PEROM 5
32#define MTD_DATAFLASH 6
33#define MTD_OTHER 14
34#define MTD_UNKNOWN 15
35
36#define MTD_CLEAR_BITS 1 // Bits can be cleared (flash)
37#define MTD_SET_BITS 2 // Bits can be set
38#define MTD_ERASEABLE 4 // Has an erase function
39#define MTD_WRITEB_WRITEABLE 8 // Direct IO is possible
40#define MTD_VOLATILE 16 // Set for RAMs
41#define MTD_XIP 32 // eXecute-In-Place possible
42#define MTD_OOB 64 // Out-of-band data (NAND flash)
43#define MTD_ECC 128 // Device capable of automatic ECC
44#define MTD_NO_VIRTBLOCKS 256 // Virtual blocks not allowed
45
46// Some common devices / combinations of capabilities
47#define MTD_CAP_ROM 0
48#define MTD_CAP_RAM (MTD_CLEAR_BITS|MTD_SET_BITS|MTD_WRITEB_WRITEABLE)
49#define MTD_CAP_NORFLASH (MTD_CLEAR_BITS|MTD_ERASEABLE)
50#define MTD_CAP_NANDFLASH (MTD_CLEAR_BITS|MTD_ERASEABLE|MTD_OOB)
51#define MTD_WRITEABLE (MTD_CLEAR_BITS|MTD_SET_BITS)
52
53
54// Types of automatic ECC/Checksum available
55#define MTD_ECC_NONE 0 // No automatic ECC available
56#define MTD_ECC_RS_DiskOnChip 1 // Automatic ECC on DiskOnChip
57#define MTD_ECC_SW 2 // SW ECC for Toshiba & Samsung devices
58
59/* ECC byte placement */
60#define MTD_NANDECC_OFF 0 // Switch off ECC (Not recommended)
61#define MTD_NANDECC_PLACE 1 // Use the given placement in the structure (YAFFS1 legacy mode)
62#define MTD_NANDECC_AUTOPLACE 2 // Use the default placement scheme
63#define MTD_NANDECC_PLACEONLY 3 // Use the given placement in the structure (Do not store ecc result on read)
64#define MTD_NANDECC_AUTOPL_USR 4 // Use the given autoplacement scheme rather than using the default
65
66/* OTP mode selection */
67#define MTD_OTP_OFF 0
68#define MTD_OTP_FACTORY 1
69#define MTD_OTP_USER 2
70
71struct mtd_info_user {
72 uint8_t type;
73 uint32_t flags;
74 uint32_t size; // Total size of the MTD
75 uint32_t erasesize;
76 uint32_t oobblock; // Size of OOB blocks (e.g. 512)
77 uint32_t oobsize; // Amount of OOB data per block (e.g. 16)
78 uint32_t ecctype;
79 uint32_t eccsize;
80};
81
82struct region_info_user {
83 uint32_t offset; /* At which this region starts,
84 * from the beginning of the MTD */
85 uint32_t erasesize; /* For this region */
86 uint32_t numblocks; /* Number of blocks in this region */
87 uint32_t regionindex;
88};
89
90struct otp_info {
91 uint32_t start;
92 uint32_t length;
93 uint32_t locked;
94};
95
96#define MEMGETINFO _IOR('M', 1, struct mtd_info_user)
97#define MEMERASE _IOW('M', 2, struct erase_info_user)
98#define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf)
99#define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf)
100#define MEMLOCK _IOW('M', 5, struct erase_info_user)
101#define MEMUNLOCK _IOW('M', 6, struct erase_info_user)
102#define MEMGETREGIONCOUNT _IOR('M', 7, int)
103#define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user)
104#define MEMSETOOBSEL _IOW('M', 9, struct nand_oobinfo)
105#define MEMGETOOBSEL _IOR('M', 10, struct nand_oobinfo)
106#define MEMGETBADBLOCK _IOW('M', 11, loff_t)
107#define MEMSETBADBLOCK _IOW('M', 12, loff_t)
108#define OTPSELECT _IOR('M', 13, int)
109#define OTPGETREGIONCOUNT _IOW('M', 14, int)
110#define OTPGETREGIONINFO _IOW('M', 15, struct otp_info)
111#define OTPLOCK _IOR('M', 16, struct otp_info)
112
113struct nand_oobinfo {
114 uint32_t useecc;
115 uint32_t eccbytes;
116 uint32_t oobfree[8][2];
117 uint32_t eccpos[32];
118};
119
120#endif /* __MTD_ABI_H__ */