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1#
2# yaffs file system configurations
3#
4
5config YAFFS_FS
6	tristate "yaffs2 file system support"
7	default n
8	depends on MTD_BLOCK
9	select YAFFS_YAFFS1
10	select YAFFS_YAFFS2
11	help
12	  yaffs2, or Yet Another Flash File System, is a file system
13	  optimised for NAND Flash chips.
14
15	  To compile the yaffs2 file system support as a module, choose M
16	  here: the module will be called yaffs2.
17
18	  If unsure, say N.
19
20	  Further information on yaffs2 is available at
21	  <http://www.aleph1.co.uk/yaffs/>.
22
23config YAFFS_YAFFS1
24	bool "512 byte / page devices"
25	depends on YAFFS_FS
26	default y
27	help
28	  Enable yaffs1 support -- yaffs for 512 byte / page devices
29
30	  Not needed for 2K-page devices.
31
32	  If unsure, say Y.
33
34config YAFFS_9BYTE_TAGS
35	bool "Use older-style on-NAND data format with pageStatus byte"
36	depends on YAFFS_YAFFS1
37	default n
38	help
39
40	  Older-style on-NAND data format has a "pageStatus" byte to record
41	  chunk/page state.  This byte is zero when the page is discarded.
42	  Choose this option if you have existing on-NAND data using this
43	  format that you need to continue to support.  New data written
44	  also uses the older-style format.  Note: Use of this option
45	  generally requires that MTD's oob layout be adjusted to use the
46	  older-style format.  See notes on tags formats and MTD versions
47	  in yaffs_mtdif1.c.
48
49	  If unsure, say N.
50
51config YAFFS_DOES_ECC
52	bool "Lets yaffs do its own ECC"
53	depends on YAFFS_FS && YAFFS_YAFFS1 && !YAFFS_9BYTE_TAGS
54	default n
55	help
56	  This enables yaffs to use its own ECC functions instead of using
57	  the ones from the generic MTD-NAND driver.
58
59	  If unsure, say N.
60
61config YAFFS_ECC_WRONG_ORDER
62	bool "Use the same ecc byte order as Steven Hill's nand_ecc.c"
63	depends on YAFFS_FS && YAFFS_DOES_ECC && !YAFFS_9BYTE_TAGS
64	default n
65	help
66	  This makes yaffs_ecc.c use the same ecc byte order as Steven
67	  Hill's nand_ecc.c. If not set, then you get the same ecc byte
68	  order as SmartMedia.
69
70	  If unsure, say N.
71
72config YAFFS_YAFFS2
73	bool "2048 byte (or larger) / page devices"
74	depends on YAFFS_FS
75	default y
76	help
77	  Enable yaffs2 support -- yaffs for >= 2K bytes per page devices
78
79	  If unsure, say Y.
80
81config YAFFS_AUTO_YAFFS2
82	bool "Autoselect yaffs2 format"
83	depends on YAFFS_YAFFS2
84	default y
85	help
86	  Without this, you need to explicitely use yaffs2 as the file
87	  system type. With this, you can say "yaffs" and yaffs or yaffs2
88	  will be used depending on the device page size (yaffs on
89	  512-byte page devices, yaffs2 on 2K page devices).
90
91	  If unsure, say Y.
92
93config YAFFS_DISABLE_TAGS_ECC
94	bool "Disable yaffs from doing ECC on tags by default"
95	depends on YAFFS_FS && YAFFS_YAFFS2
96	default n
97	help
98	  This defaults yaffs to using its own ECC calculations on tags instead of
99	  just relying on the MTD.
100	  This behavior can also be overridden with tags_ecc_on and
101	  tags_ecc_off mount options.
102
103	  If unsure, say N.
104
105config YAFFS_ALWAYS_CHECK_CHUNK_ERASED
106	bool "Force chunk erase check"
107	depends on YAFFS_FS
108	default n
109	help
110          Normally yaffs only checks chunks before writing until an erased
111	  chunk is found. This helps to detect any partially written
112	  chunks that might have happened due to power loss.
113
114	  Enabling this forces on the test that chunks are erased in flash
115	  before writing to them. This takes more time but is potentially
116	  a bit more secure.
117
118	  Suggest setting Y during development and ironing out driver
119	  issues etc. Suggest setting to N if you want faster writing.
120
121	  If unsure, say Y.
122
123config YAFFS_EMPTY_LOST_AND_FOUND
124	bool "Empty lost and found on boot"
125	depends on YAFFS_FS
126	default n
127	help
128	  If this is enabled then the contents of lost and found is
129	  automatically dumped at mount.
130
131	  If unsure, say N.
132
133config YAFFS_DISABLE_BLOCK_REFRESHING
134	bool "Disable yaffs2 block refreshing"
135	depends on YAFFS_FS
136	default n
137	help
138	 If this is set, then block refreshing is disabled.
139	 Block refreshing infrequently refreshes the oldest block in
140	 a yaffs2 file system. This mechanism helps to refresh flash to
141	 mitigate against data loss. This is particularly useful for MLC.
142
143	  If unsure, say N.
144
145config YAFFS_DISABLE_BACKGROUND
146	bool "Disable yaffs2 background processing"
147	depends on YAFFS_FS
148	default n
149	help
150	 If this is set, then background processing is disabled.
151	 Background processing makes many foreground activities faster.
152
153	 If unsure, say N.
154
155config YAFFS_XATTR
156	bool "Enable yaffs2 xattr support"
157	depends on YAFFS_FS
158	default y
159	help
160	 If this is set then yaffs2 will provide xattr support.
161	 If unsure, say Y.
162