1 # drivers/mtd/chips/Kconfig
2 # $Id: Kconfig,v 1.13 2004/12/01 15:49:10 nico Exp $
4 menu "RAM/ROM/Flash chip drivers"
8 tristate "Detect flash chips by Common Flash Interface (CFI) probe"
12 The Common Flash Interface specification was developed by Intel,
13 AMD and other flash manufactures that provides a universal method
14 for probing the capabilities of flash devices. If you wish to
15 support any device that is CFI-compliant, you need to enable this
16 option. Visit <http://www.amd.com/products/nvd/overview/cfi.html>
17 for more information on CFI.
20 tristate "Detect non-CFI AMD/JEDEC-compatible flash chips"
24 This option enables JEDEC-style probing of flash chips which are not
25 compatible with the Common Flash Interface, but will use the common
26 CFI-targetted flash drivers for any chips which are identified which
27 are in fact compatible in all but the probe method. This actually
28 covers most AMD/Fujitsu-compatible chips, and will shortly cover also
29 non-CFI Intel chips (that code is in MTD CVS and should shortly be sent
30 for inclusion in Linus' tree)
35 config MTD_CFI_ADV_OPTIONS
36 bool "Flash chip driver advanced configuration options"
37 depends on MTD_GEN_PROBE
39 If you need to specify a specific endianness for access to flash
40 chips, or if you wish to reduce the size of the kernel by including
41 support for only specific arrangements of flash chips, say 'Y'. This
42 option does not directly affect the code, but will enable other
43 configuration options which allow you to do so.
48 prompt "Flash cmd/query data swapping"
49 depends on MTD_CFI_ADV_OPTIONS
50 default MTD_CFI_NOSWAP
55 This option defines the way in which the CPU attempts to arrange
56 data bits when writing the 'magic' commands to the chips. Saying
57 'NO', which is the default when CONFIG_MTD_CFI_ADV_OPTIONS isn't
58 enabled, means that the CPU will not do any swapping; the chips
59 are expected to be wired to the CPU in 'host-endian' form.
60 Specific arrangements are possible with the BIG_ENDIAN_BYTE and
61 LITTLE_ENDIAN_BYTE, if the bytes are reversed.
63 If you have a LART, on which the data (and address) lines were
64 connected in a fashion which ensured that the nets were as short
65 as possible, resulting in a bit-shuffling which seems utterly
66 random to the untrained eye, you need the LART_ENDIAN_BYTE option.
68 Yes, there really exists something sicker than PDP-endian :)
70 config MTD_CFI_BE_BYTE_SWAP
71 bool "BIG_ENDIAN_BYTE"
73 config MTD_CFI_LE_BYTE_SWAP
74 bool "LITTLE_ENDIAN_BYTE"
78 config MTD_CFI_GEOMETRY
79 bool "Specific CFI Flash geometry selection"
80 depends on MTD_CFI_ADV_OPTIONS
82 This option does not affect the code directly, but will enable
83 some other configuration options which would allow you to reduce
84 the size of the kernel by including support for only certain
85 arrangements of CFI chips. If unsure, say 'N' and all options
86 which are supported by the current code will be enabled.
88 config MTD_MAP_BANK_WIDTH_1
89 bool "Support 8-bit buswidth" if MTD_CFI_GEOMETRY
92 If you wish to support CFI devices on a physical bus which is
95 config MTD_MAP_BANK_WIDTH_2
96 bool "Support 16-bit buswidth" if MTD_CFI_GEOMETRY
99 If you wish to support CFI devices on a physical bus which is
100 16 bits wide, say 'Y'.
102 config MTD_MAP_BANK_WIDTH_4
103 bool "Support 32-bit buswidth" if MTD_CFI_GEOMETRY
106 If you wish to support CFI devices on a physical bus which is
107 32 bits wide, say 'Y'.
109 config MTD_MAP_BANK_WIDTH_8
110 bool "Support 64-bit buswidth" if MTD_CFI_GEOMETRY
113 If you wish to support CFI devices on a physical bus which is
114 64 bits wide, say 'Y'.
116 config MTD_MAP_BANK_WIDTH_16
117 bool "Support 128-bit buswidth" if MTD_CFI_GEOMETRY
120 If you wish to support CFI devices on a physical bus which is
121 128 bits wide, say 'Y'.
123 config MTD_MAP_BANK_WIDTH_32
124 bool "Support 256-bit buswidth" if MTD_CFI_GEOMETRY
127 If you wish to support CFI devices on a physical bus which is
128 256 bits wide, say 'Y'.
131 bool "Support 1-chip flash interleave" if MTD_CFI_GEOMETRY
134 If your flash chips are not interleaved - i.e. you only have one
135 flash chip addressed by each bus cycle, then say 'Y'.
138 bool "Support 2-chip flash interleave" if MTD_CFI_GEOMETRY
141 If your flash chips are interleaved in pairs - i.e. you have two
142 flash chips addressed by each bus cycle, then say 'Y'.
145 bool "Support 4-chip flash interleave" if MTD_CFI_GEOMETRY
148 If your flash chips are interleaved in fours - i.e. you have four
149 flash chips addressed by each bus cycle, then say 'Y'.
152 bool "Support 8-chip flash interleave" if MTD_CFI_GEOMETRY
155 If your flash chips are interleaved in eights - i.e. you have eight
156 flash chips addressed by each bus cycle, then say 'Y'.
158 config MTD_CFI_INTELEXT
159 tristate "Support for Intel/Sharp flash chips"
160 depends on MTD_GEN_PROBE
163 The Common Flash Interface defines a number of different command
164 sets which a CFI-compliant chip may claim to implement. This code
165 provides support for one of those command sets, used on Intel
166 StrataFlash and other parts.
168 config MTD_CFI_AMDSTD
169 tristate "Support for AMD/Fujitsu flash chips"
170 depends on MTD_GEN_PROBE
173 The Common Flash Interface defines a number of different command
174 sets which a CFI-compliant chip may claim to implement. This code
175 provides support for one of those command sets, used on chips
176 including the AMD Am29LV320.
178 config MTD_CFI_AMDSTD_RETRY
179 int "Retry failed commands (erase/program)"
180 depends on MTD_CFI_AMDSTD
183 Some chips, when attached to a shared bus, don't properly filter
184 bus traffic that is destined to other devices. This broken
185 behavior causes erase and program sequences to be aborted when
186 the sequences are mixed with traffic for other devices.
188 SST49LF040 (and related) chips are know to be broken.
190 config MTD_CFI_AMDSTD_RETRY_MAX
191 int "Max retries of failed commands (erase/program)"
192 depends on MTD_CFI_AMDSTD_RETRY
195 If you have an SST49LF040 (or related chip) then this value should
196 be set to at least 1. This can also be adjusted at driver load
197 time with the retry_cmd_max module parameter.
200 tristate "Support for ST (Advanced Architecture) flash chips"
201 depends on MTD_GEN_PROBE
204 The Common Flash Interface defines a number of different command
205 sets which a CFI-compliant chip may claim to implement. This code
206 provides support for one of those command sets.
212 tristate "Support for RAM chips in bus mapping"
215 This option enables basic support for RAM chips accessed through
216 a bus mapping driver.
219 tristate "Support for ROM chips in bus mapping"
222 This option enables basic support for ROM chips accessed through
223 a bus mapping driver.
226 tristate "Support for absent chips in bus mapping"
229 This option enables support for a dummy probing driver used to
230 allocated placeholder MTD devices on systems that have socketed
231 or removable media. Use of this driver as a fallback chip probe
232 preserves the expected registration order of MTD device nodes on
233 the system regardless of media presence. Device nodes created
234 with this driver will return -ENODEV upon access.
236 config MTD_OBSOLETE_CHIPS
237 depends on MTD && BROKEN
238 bool "Older (theoretically obsoleted now) drivers for non-CFI chips"
240 This option does not enable any code directly, but will allow you to
241 select some other chip drivers which are now considered obsolete,
242 because the generic CONFIG_JEDECPROBE code above should now detect
243 the chips which are supported by these drivers, and allow the generic
244 CFI-compatible drivers to drive the chips. Say 'N' here unless you have
245 already tried the CONFIG_JEDECPROBE method and reported its failure
246 to the MTD mailing list at <linux-mtd@lists.infradead.org>
249 tristate "AMD compatible flash chip support (non-CFI)"
250 depends on MTD && MTD_OBSOLETE_CHIPS
252 This option enables support for flash chips using AMD-compatible
253 commands, including some which are not CFI-compatible and hence
254 cannot be used with the CONFIG_MTD_CFI_AMDSTD option.
256 It also works on AMD compatible chips that do conform to CFI.
259 tristate "pre-CFI Sharp chip support"
260 depends on MTD && MTD_OBSOLETE_CHIPS
262 This option enables support for flash chips using Sharp-compatible
263 commands, including some which are not CFI-compatible and hence
264 cannot be used with the CONFIG_MTD_CFI_INTELxxx options.
267 tristate "JEDEC device support"
268 depends on MTD && MTD_OBSOLETE_CHIPS
270 Enable older older JEDEC flash interface devices for self
271 programming flash. It is commonly used in older AMD chips. It is
272 only called JEDEC because the JEDEC association
273 <http://www.jedec.org/> distributes the identification codes for the
277 bool "XIP aware MTD support"
278 depends on !SMP && MTD_CFI_INTELEXT && EXPERIMENTAL
279 default y if XIP_KERNEL
281 This allows MTD support to work with flash memory which is also
282 used for XIP purposes. If you're not sure what this is all about