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 | 18 | select MTD_GEN_PROBE |
bde90062 | 19 | select MTD_CFI_UTIL |
1da177e4 LT |
20 | help |
21 | This option enables JEDEC-style probing of flash chips which are not | |
22 | compatible with the Common Flash Interface, but will use the common | |
25985edc | 23 | CFI-targeted flash drivers for any chips which are identified which |
1da177e4 | 24 | are in fact compatible in all but the probe method. This actually |
8917f6f7 AB |
25 | covers most AMD/Fujitsu-compatible chips and also non-CFI |
26 | Intel chips. | |
1da177e4 LT |
27 | |
28 | config MTD_GEN_PROBE | |
29 | tristate | |
30 | ||
31 | config MTD_CFI_ADV_OPTIONS | |
32 | bool "Flash chip driver advanced configuration options" | |
33 | depends on MTD_GEN_PROBE | |
34 | help | |
35 | If you need to specify a specific endianness for access to flash | |
36 | chips, or if you wish to reduce the size of the kernel by including | |
37 | support for only specific arrangements of flash chips, say 'Y'. This | |
1f948b43 | 38 | option does not directly affect the code, but will enable other |
1da177e4 LT |
39 | configuration options which allow you to do so. |
40 | ||
41 | If unsure, say 'N'. | |
42 | ||
43 | choice | |
44 | prompt "Flash cmd/query data swapping" | |
45 | depends on MTD_CFI_ADV_OPTIONS | |
46 | default MTD_CFI_NOSWAP | |
1da177e4 LT |
47 | ---help--- |
48 | This option defines the way in which the CPU attempts to arrange | |
49 | data bits when writing the 'magic' commands to the chips. Saying | |
50 | 'NO', which is the default when CONFIG_MTD_CFI_ADV_OPTIONS isn't | |
51 | enabled, means that the CPU will not do any swapping; the chips | |
1f948b43 | 52 | are expected to be wired to the CPU in 'host-endian' form. |
1da177e4 LT |
53 | Specific arrangements are possible with the BIG_ENDIAN_BYTE and |
54 | LITTLE_ENDIAN_BYTE, if the bytes are reversed. | |
55 | ||
2e61c3a5 PB |
56 | config MTD_CFI_NOSWAP |
57 | bool "NO" | |
1da177e4 LT |
58 | |
59 | config MTD_CFI_BE_BYTE_SWAP | |
60 | bool "BIG_ENDIAN_BYTE" | |
61 | ||
62 | config MTD_CFI_LE_BYTE_SWAP | |
63 | bool "LITTLE_ENDIAN_BYTE" | |
64 | ||
65 | endchoice | |
66 | ||
67 | config MTD_CFI_GEOMETRY | |
68 | bool "Specific CFI Flash geometry selection" | |
69 | depends on MTD_CFI_ADV_OPTIONS | |
f5f92b36 AB |
70 | select MTD_MAP_BANK_WIDTH_1 if !(MTD_MAP_BANK_WIDTH_2 || \ |
71 | MTD_MAP_BANK_WIDTH_4 || MTD_MAP_BANK_WIDTH_8 || \ | |
72 | MTD_MAP_BANK_WIDTH_16 || MTD_MAP_BANK_WIDTH_32) | |
73 | select MTD_CFI_I1 if !(MTD_CFI_I2 || MTD_CFI_I4 || MTD_CFI_I8) | |
1da177e4 | 74 | help |
1f948b43 | 75 | This option does not affect the code directly, but will enable |
1da177e4 | 76 | some other configuration options which would allow you to reduce |
1f948b43 TG |
77 | the size of the kernel by including support for only certain |
78 | arrangements of CFI chips. If unsure, say 'N' and all options | |
1da177e4 LT |
79 | which are supported by the current code will be enabled. |
80 | ||
81 | config MTD_MAP_BANK_WIDTH_1 | |
82 | bool "Support 8-bit buswidth" if MTD_CFI_GEOMETRY | |
83 | default y | |
84 | help | |
85 | If you wish to support CFI devices on a physical bus which is | |
86 | 8 bits wide, say 'Y'. | |
87 | ||
88 | config MTD_MAP_BANK_WIDTH_2 | |
89 | bool "Support 16-bit buswidth" if MTD_CFI_GEOMETRY | |
90 | default y | |
91 | help | |
92 | If you wish to support CFI devices on a physical bus which is | |
93 | 16 bits wide, say 'Y'. | |
94 | ||
95 | config MTD_MAP_BANK_WIDTH_4 | |
96 | bool "Support 32-bit buswidth" if MTD_CFI_GEOMETRY | |
97 | default y | |
98 | help | |
99 | If you wish to support CFI devices on a physical bus which is | |
100 | 32 bits wide, say 'Y'. | |
101 | ||
102 | config MTD_MAP_BANK_WIDTH_8 | |
103 | bool "Support 64-bit buswidth" if MTD_CFI_GEOMETRY | |
104 | default n | |
105 | help | |
106 | If you wish to support CFI devices on a physical bus which is | |
107 | 64 bits wide, say 'Y'. | |
108 | ||
109 | config MTD_MAP_BANK_WIDTH_16 | |
110 | bool "Support 128-bit buswidth" if MTD_CFI_GEOMETRY | |
111 | default n | |
112 | help | |
113 | If you wish to support CFI devices on a physical bus which is | |
114 | 128 bits wide, say 'Y'. | |
115 | ||
116 | config MTD_MAP_BANK_WIDTH_32 | |
117 | bool "Support 256-bit buswidth" if MTD_CFI_GEOMETRY | |
118 | default n | |
119 | help | |
120 | If you wish to support CFI devices on a physical bus which is | |
121 | 256 bits wide, say 'Y'. | |
122 | ||
123 | config MTD_CFI_I1 | |
124 | bool "Support 1-chip flash interleave" if MTD_CFI_GEOMETRY | |
125 | default y | |
126 | help | |
127 | If your flash chips are not interleaved - i.e. you only have one | |
128 | flash chip addressed by each bus cycle, then say 'Y'. | |
129 | ||
130 | config MTD_CFI_I2 | |
131 | bool "Support 2-chip flash interleave" if MTD_CFI_GEOMETRY | |
132 | default y | |
133 | help | |
134 | If your flash chips are interleaved in pairs - i.e. you have two | |
135 | flash chips addressed by each bus cycle, then say 'Y'. | |
136 | ||
137 | config MTD_CFI_I4 | |
138 | bool "Support 4-chip flash interleave" if MTD_CFI_GEOMETRY | |
139 | default n | |
140 | help | |
141 | If your flash chips are interleaved in fours - i.e. you have four | |
142 | flash chips addressed by each bus cycle, then say 'Y'. | |
143 | ||
144 | config MTD_CFI_I8 | |
145 | bool "Support 8-chip flash interleave" if MTD_CFI_GEOMETRY | |
146 | default n | |
147 | help | |
148 | If your flash chips are interleaved in eights - i.e. you have eight | |
149 | flash chips addressed by each bus cycle, then say 'Y'. | |
150 | ||
f77814dd NP |
151 | config MTD_OTP |
152 | bool "Protection Registers aka one-time programmable (OTP) bits" | |
153 | depends on MTD_CFI_ADV_OPTIONS | |
154 | default n | |
155 | help | |
156 | This enables support for reading, writing and locking so called | |
157 | "Protection Registers" present on some flash chips. | |
158 | A subset of them are pre-programmed at the factory with a | |
159 | unique set of values. The rest is user-programmable. | |
160 | ||
161 | The user-programmable Protection Registers contain one-time | |
162 | programmable (OTP) bits; when programmed, register bits cannot be | |
163 | erased. Each Protection Register can be accessed multiple times to | |
164 | program individual bits, as long as the register remains unlocked. | |
165 | ||
166 | Each Protection Register has an associated Lock Register bit. When a | |
167 | Lock Register bit is programmed, the associated Protection Register | |
168 | can only be read; it can no longer be programmed. Additionally, | |
169 | because the Lock Register bits themselves are OTP, when programmed, | |
170 | Lock Register bits cannot be erased. Therefore, when a Protection | |
171 | Register is locked, it cannot be unlocked. | |
172 | ||
173 | This feature should therefore be used with extreme care. Any mistake | |
174 | in the programming of OTP bits will waste them. | |
175 | ||
1da177e4 | 176 | config MTD_CFI_INTELEXT |
5a4c4c5e | 177 | tristate "Support for CFI command set 0001 (Intel/Sharp chips)" |
1da177e4 LT |
178 | depends on MTD_GEN_PROBE |
179 | select MTD_CFI_UTIL | |
180 | help | |
181 | The Common Flash Interface defines a number of different command | |
182 | sets which a CFI-compliant chip may claim to implement. This code | |
5a4c4c5e PDM |
183 | provides support for command set 0001, used on Intel StrataFlash |
184 | and other parts. | |
1da177e4 LT |
185 | |
186 | config MTD_CFI_AMDSTD | |
5a4c4c5e | 187 | tristate "Support for CFI command set 0002 (AMD/Fujitsu/Spansion chips)" |
1da177e4 LT |
188 | depends on MTD_GEN_PROBE |
189 | select MTD_CFI_UTIL | |
190 | help | |
191 | The Common Flash Interface defines a number of different command | |
192 | sets which a CFI-compliant chip may claim to implement. This code | |
5a4c4c5e PDM |
193 | provides support for command set 0002, used on chips including |
194 | the AMD Am29LV320. | |
1da177e4 | 195 | |
1da177e4 | 196 | config MTD_CFI_STAA |
5a4c4c5e | 197 | tristate "Support for CFI command set 0020 (ST (Advanced Architecture) chips)" |
1da177e4 LT |
198 | depends on MTD_GEN_PROBE |
199 | select MTD_CFI_UTIL | |
200 | help | |
201 | The Common Flash Interface defines a number of different command | |
202 | sets which a CFI-compliant chip may claim to implement. This code | |
5a4c4c5e | 203 | provides support for command set 0020. |
1da177e4 LT |
204 | |
205 | config MTD_CFI_UTIL | |
206 | tristate | |
207 | ||
208 | config MTD_RAM | |
209 | tristate "Support for RAM chips in bus mapping" | |
1da177e4 | 210 | help |
1f948b43 | 211 | This option enables basic support for RAM chips accessed through |
1da177e4 LT |
212 | a bus mapping driver. |
213 | ||
214 | config MTD_ROM | |
215 | tristate "Support for ROM chips in bus mapping" | |
1da177e4 | 216 | help |
1f948b43 | 217 | This option enables basic support for ROM chips accessed through |
1da177e4 LT |
218 | a bus mapping driver. |
219 | ||
220 | config MTD_ABSENT | |
221 | tristate "Support for absent chips in bus mapping" | |
1da177e4 LT |
222 | help |
223 | This option enables support for a dummy probing driver used to | |
224 | allocated placeholder MTD devices on systems that have socketed | |
225 | or removable media. Use of this driver as a fallback chip probe | |
226 | preserves the expected registration order of MTD device nodes on | |
227 | the system regardless of media presence. Device nodes created | |
228 | with this driver will return -ENODEV upon access. | |
229 | ||
1da177e4 LT |
230 | config MTD_XIP |
231 | bool "XIP aware MTD support" | |
7b4dd55b | 232 | depends on !SMP && (MTD_CFI_INTELEXT || MTD_CFI_AMDSTD) && ARCH_MTD_XIP |
1da177e4 LT |
233 | default y if XIP_KERNEL |
234 | help | |
235 | This allows MTD support to work with flash memory which is also | |
236 | used for XIP purposes. If you're not sure what this is all about | |
237 | then say N. | |
238 | ||
239 | endmenu |