Commit | Line | Data |
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1da177e4 LT |
1 | menu "RAM/ROM/Flash chip drivers" |
2 | depends on MTD!=n | |
3 | ||
4 | config MTD_CFI | |
5 | tristate "Detect flash chips by Common Flash Interface (CFI) probe" | |
1da177e4 | 6 | select MTD_GEN_PROBE |
5e706469 | 7 | select MTD_CFI_UTIL |
1da177e4 LT |
8 | help |
9 | The Common Flash Interface specification was developed by Intel, | |
10 | AMD and other flash manufactures that provides a universal method | |
11 | for probing the capabilities of flash devices. If you wish to | |
12 | support any device that is CFI-compliant, you need to enable this | |
13 | option. Visit <http://www.amd.com/products/nvd/overview/cfi.html> | |
14 | for more information on CFI. | |
15 | ||
16 | config MTD_JEDECPROBE | |
17 | tristate "Detect non-CFI AMD/JEDEC-compatible flash chips" | |
1da177e4 LT |
18 | select MTD_GEN_PROBE |
19 | help | |
20 | This option enables JEDEC-style probing of flash chips which are not | |
21 | compatible with the Common Flash Interface, but will use the common | |
25985edc | 22 | CFI-targeted flash drivers for any chips which are identified which |
1da177e4 | 23 | are in fact compatible in all but the probe method. This actually |
8917f6f7 AB |
24 | covers most AMD/Fujitsu-compatible chips and also non-CFI |
25 | Intel chips. | |
1da177e4 LT |
26 | |
27 | config MTD_GEN_PROBE | |
28 | tristate | |
29 | ||
30 | config MTD_CFI_ADV_OPTIONS | |
31 | bool "Flash chip driver advanced configuration options" | |
32 | depends on MTD_GEN_PROBE | |
33 | help | |
34 | If you need to specify a specific endianness for access to flash | |
35 | chips, or if you wish to reduce the size of the kernel by including | |
36 | support for only specific arrangements of flash chips, say 'Y'. This | |
1f948b43 | 37 | option does not directly affect the code, but will enable other |
1da177e4 LT |
38 | configuration options which allow you to do so. |
39 | ||
40 | If unsure, say 'N'. | |
41 | ||
42 | choice | |
43 | prompt "Flash cmd/query data swapping" | |
44 | depends on MTD_CFI_ADV_OPTIONS | |
45 | default MTD_CFI_NOSWAP | |
1da177e4 LT |
46 | ---help--- |
47 | This option defines the way in which the CPU attempts to arrange | |
48 | data bits when writing the 'magic' commands to the chips. Saying | |
49 | 'NO', which is the default when CONFIG_MTD_CFI_ADV_OPTIONS isn't | |
50 | enabled, means that the CPU will not do any swapping; the chips | |
1f948b43 | 51 | are expected to be wired to the CPU in 'host-endian' form. |
1da177e4 LT |
52 | Specific arrangements are possible with the BIG_ENDIAN_BYTE and |
53 | LITTLE_ENDIAN_BYTE, if the bytes are reversed. | |
54 | ||
2e61c3a5 PB |
55 | config MTD_CFI_NOSWAP |
56 | bool "NO" | |
1da177e4 LT |
57 | |
58 | config MTD_CFI_BE_BYTE_SWAP | |
59 | bool "BIG_ENDIAN_BYTE" | |
60 | ||
61 | config MTD_CFI_LE_BYTE_SWAP | |
62 | bool "LITTLE_ENDIAN_BYTE" | |
63 | ||
64 | endchoice | |
65 | ||
66 | config MTD_CFI_GEOMETRY | |
67 | bool "Specific CFI Flash geometry selection" | |
68 | depends on MTD_CFI_ADV_OPTIONS | |
69 | help | |
1f948b43 | 70 | This option does not affect the code directly, but will enable |
1da177e4 | 71 | some other configuration options which would allow you to reduce |
1f948b43 TG |
72 | the size of the kernel by including support for only certain |
73 | arrangements of CFI chips. If unsure, say 'N' and all options | |
1da177e4 LT |
74 | which are supported by the current code will be enabled. |
75 | ||
76 | config MTD_MAP_BANK_WIDTH_1 | |
77 | bool "Support 8-bit buswidth" if MTD_CFI_GEOMETRY | |
78 | default y | |
79 | help | |
80 | If you wish to support CFI devices on a physical bus which is | |
81 | 8 bits wide, say 'Y'. | |
82 | ||
83 | config MTD_MAP_BANK_WIDTH_2 | |
84 | bool "Support 16-bit buswidth" if MTD_CFI_GEOMETRY | |
85 | default y | |
86 | help | |
87 | If you wish to support CFI devices on a physical bus which is | |
88 | 16 bits wide, say 'Y'. | |
89 | ||
90 | config MTD_MAP_BANK_WIDTH_4 | |
91 | bool "Support 32-bit buswidth" if MTD_CFI_GEOMETRY | |
92 | default y | |
93 | help | |
94 | If you wish to support CFI devices on a physical bus which is | |
95 | 32 bits wide, say 'Y'. | |
96 | ||
97 | config MTD_MAP_BANK_WIDTH_8 | |
98 | bool "Support 64-bit buswidth" if MTD_CFI_GEOMETRY | |
99 | default n | |
100 | help | |
101 | If you wish to support CFI devices on a physical bus which is | |
102 | 64 bits wide, say 'Y'. | |
103 | ||
104 | config MTD_MAP_BANK_WIDTH_16 | |
105 | bool "Support 128-bit buswidth" if MTD_CFI_GEOMETRY | |
106 | default n | |
107 | help | |
108 | If you wish to support CFI devices on a physical bus which is | |
109 | 128 bits wide, say 'Y'. | |
110 | ||
111 | config MTD_MAP_BANK_WIDTH_32 | |
112 | bool "Support 256-bit buswidth" if MTD_CFI_GEOMETRY | |
113 | default n | |
114 | help | |
115 | If you wish to support CFI devices on a physical bus which is | |
116 | 256 bits wide, say 'Y'. | |
117 | ||
118 | config MTD_CFI_I1 | |
119 | bool "Support 1-chip flash interleave" if MTD_CFI_GEOMETRY | |
120 | default y | |
121 | help | |
122 | If your flash chips are not interleaved - i.e. you only have one | |
123 | flash chip addressed by each bus cycle, then say 'Y'. | |
124 | ||
125 | config MTD_CFI_I2 | |
126 | bool "Support 2-chip flash interleave" if MTD_CFI_GEOMETRY | |
127 | default y | |
128 | help | |
129 | If your flash chips are interleaved in pairs - i.e. you have two | |
130 | flash chips addressed by each bus cycle, then say 'Y'. | |
131 | ||
132 | config MTD_CFI_I4 | |
133 | bool "Support 4-chip flash interleave" if MTD_CFI_GEOMETRY | |
134 | default n | |
135 | help | |
136 | If your flash chips are interleaved in fours - i.e. you have four | |
137 | flash chips addressed by each bus cycle, then say 'Y'. | |
138 | ||
139 | config MTD_CFI_I8 | |
140 | bool "Support 8-chip flash interleave" if MTD_CFI_GEOMETRY | |
141 | default n | |
142 | help | |
143 | If your flash chips are interleaved in eights - i.e. you have eight | |
144 | flash chips addressed by each bus cycle, then say 'Y'. | |
145 | ||
f77814dd NP |
146 | config MTD_OTP |
147 | bool "Protection Registers aka one-time programmable (OTP) bits" | |
148 | depends on MTD_CFI_ADV_OPTIONS | |
149 | default n | |
150 | help | |
151 | This enables support for reading, writing and locking so called | |
152 | "Protection Registers" present on some flash chips. | |
153 | A subset of them are pre-programmed at the factory with a | |
154 | unique set of values. The rest is user-programmable. | |
155 | ||
156 | The user-programmable Protection Registers contain one-time | |
157 | programmable (OTP) bits; when programmed, register bits cannot be | |
158 | erased. Each Protection Register can be accessed multiple times to | |
159 | program individual bits, as long as the register remains unlocked. | |
160 | ||
161 | Each Protection Register has an associated Lock Register bit. When a | |
162 | Lock Register bit is programmed, the associated Protection Register | |
163 | can only be read; it can no longer be programmed. Additionally, | |
164 | because the Lock Register bits themselves are OTP, when programmed, | |
165 | Lock Register bits cannot be erased. Therefore, when a Protection | |
166 | Register is locked, it cannot be unlocked. | |
167 | ||
168 | This feature should therefore be used with extreme care. Any mistake | |
169 | in the programming of OTP bits will waste them. | |
170 | ||
1da177e4 LT |
171 | config MTD_CFI_INTELEXT |
172 | tristate "Support for Intel/Sharp flash chips" | |
173 | depends on MTD_GEN_PROBE | |
174 | select MTD_CFI_UTIL | |
175 | help | |
176 | The Common Flash Interface defines a number of different command | |
177 | sets which a CFI-compliant chip may claim to implement. This code | |
178 | provides support for one of those command sets, used on Intel | |
179 | StrataFlash and other parts. | |
180 | ||
181 | config MTD_CFI_AMDSTD | |
a0e7229e | 182 | tristate "Support for AMD/Fujitsu/Spansion flash chips" |
1da177e4 LT |
183 | depends on MTD_GEN_PROBE |
184 | select MTD_CFI_UTIL | |
185 | help | |
186 | The Common Flash Interface defines a number of different command | |
187 | sets which a CFI-compliant chip may claim to implement. This code | |
1f948b43 | 188 | provides support for one of those command sets, used on chips |
1da177e4 LT |
189 | including the AMD Am29LV320. |
190 | ||
1da177e4 LT |
191 | config MTD_CFI_STAA |
192 | tristate "Support for ST (Advanced Architecture) flash chips" | |
193 | depends on MTD_GEN_PROBE | |
194 | select MTD_CFI_UTIL | |
195 | help | |
196 | The Common Flash Interface defines a number of different command | |
197 | sets which a CFI-compliant chip may claim to implement. This code | |
198 | provides support for one of those command sets. | |
199 | ||
200 | config MTD_CFI_UTIL | |
201 | tristate | |
202 | ||
203 | config MTD_RAM | |
204 | tristate "Support for RAM chips in bus mapping" | |
1da177e4 | 205 | help |
1f948b43 | 206 | This option enables basic support for RAM chips accessed through |
1da177e4 LT |
207 | a bus mapping driver. |
208 | ||
209 | config MTD_ROM | |
210 | tristate "Support for ROM chips in bus mapping" | |
1da177e4 | 211 | help |
1f948b43 | 212 | This option enables basic support for ROM chips accessed through |
1da177e4 LT |
213 | a bus mapping driver. |
214 | ||
215 | config MTD_ABSENT | |
216 | tristate "Support for absent chips in bus mapping" | |
1da177e4 LT |
217 | help |
218 | This option enables support for a dummy probing driver used to | |
219 | allocated placeholder MTD devices on systems that have socketed | |
220 | or removable media. Use of this driver as a fallback chip probe | |
221 | preserves the expected registration order of MTD device nodes on | |
222 | the system regardless of media presence. Device nodes created | |
223 | with this driver will return -ENODEV upon access. | |
224 | ||
1da177e4 LT |
225 | config MTD_XIP |
226 | bool "XIP aware MTD support" | |
7b4dd55b | 227 | depends on !SMP && (MTD_CFI_INTELEXT || MTD_CFI_AMDSTD) && ARCH_MTD_XIP |
1da177e4 LT |
228 | default y if XIP_KERNEL |
229 | help | |
230 | This allows MTD support to work with flash memory which is also | |
231 | used for XIP purposes. If you're not sure what this is all about | |
232 | then say N. | |
233 | ||
234 | endmenu |