fix execve()
[deliverable/linux.git] / drivers / ide / Kconfig
CommitLineData
1da177e4
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1#
2# IDE ATA ATAPI Block device driver configuration
3#
4# Andre Hedrick <andre@linux-ide.org>
5#
6
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7# Select HAVE_IDE if IDE is supported
8config HAVE_IDE
9 def_bool n
10
e0ff9cd1 11menuconfig IDE
1da177e4 12 tristate "ATA/ATAPI/MFM/RLL support"
ec7748b5 13 depends on HAVE_IDE
e0ff9cd1 14 depends on BLOCK
1da177e4
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15 ---help---
16 If you say Y here, your kernel will be able to manage low cost mass
17 storage units such as ATA/(E)IDE and ATAPI units. The most common
18 cases are IDE hard drives and ATAPI CD-ROM drives.
19
20 If your system is pure SCSI and doesn't use these interfaces, you
21 can say N here.
22
23 Integrated Disk Electronics (IDE aka ATA-1) is a connecting standard
24 for mass storage units such as hard disks. It was designed by
25 Western Digital and Compaq Computer in 1984. It was then named
26 ST506. Quite a number of disks use the IDE interface.
27
28 AT Attachment (ATA) is the superset of the IDE specifications.
29 ST506 was also called ATA-1.
30
31 Fast-IDE is ATA-2 (also named Fast ATA), Enhanced IDE (EIDE) is
32 ATA-3. It provides support for larger disks (up to 8.4GB by means of
33 the LBA standard), more disks (4 instead of 2) and for other mass
34 storage units such as tapes and cdrom. UDMA/33 (aka UltraDMA/33) is
35 ATA-4 and provides faster (and more CPU friendly) transfer modes
36 than previous PIO (Programmed processor Input/Output) from previous
37 ATA/IDE standards by means of fast DMA controllers.
38
39 ATA Packet Interface (ATAPI) is a protocol used by EIDE tape and
40 CD-ROM drives, similar in many respects to the SCSI protocol.
41
42 SMART IDE (Self Monitoring, Analysis and Reporting Technology) was
43 designed in order to prevent data corruption and disk crash by
44 detecting pre hardware failure conditions (heat, access time, and
45 the like...). Disks built since June 1995 may follow this standard.
46 The kernel itself doesn't manage this; however there are quite a
47 number of user programs such as smart that can query the status of
48 SMART parameters from disk drives.
49
50 To compile this driver as a module, choose M here: the
51 module will be called ide.
52
1c10e938 53 For further information, please read <file:Documentation/ide/ide.txt>.
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54
55 If unsure, say Y.
56
57if IDE
58
d57d39c8 59config IDE_MAX_HWIFS
1da177e4 60 int "Max IDE interfaces"
83d7dbc4 61 depends on ALPHA || SUPERH || IA64 || EMBEDDED
8929fea3 62 range 1 10
1da177e4
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63 default 4
64 help
65 This is the maximum number of IDE hardware interfaces that will
66 be supported by the driver. Make sure it is at least as high as
67 the number of IDE interfaces in your system.
68
69config BLK_DEV_IDE
70 tristate "Enhanced IDE/MFM/RLL disk/cdrom/tape/floppy support"
71 ---help---
72 If you say Y here, you will use the full-featured IDE driver to
73 control up to ten ATA/IDE interfaces, each being able to serve a
74 "master" and a "slave" device, for a total of up to twenty ATA/IDE
75 disk/cdrom/tape/floppy drives.
76
77 Useful information about large (>540 MB) IDE disks, multiple
78 interfaces, what to do if ATA/IDE devices are not automatically
79 detected, sound card ATA/IDE ports, module support, and other
1c10e938 80 topics, is contained in <file:Documentation/ide/ide.txt>. For detailed
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81 information about hard drives, consult the Disk-HOWTO and the
82 Multi-Disk-HOWTO, available from
83 <http://www.tldp.org/docs.html#howto>.
84
85 To fine-tune ATA/IDE drive/interface parameters for improved
86 performance, look for the hdparm package at
87 <ftp://ibiblio.org/pub/Linux/system/hardware/>.
88
89 To compile this driver as a module, choose M here and read
1c10e938 90 <file:Documentation/ide/ide.txt>. The module will be called ide-mod.
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91 Do not compile this driver as a module if your root file system (the
92 one containing the directory /) is located on an IDE device.
93
94 If you have one or more IDE drives, say Y or M here. If your system
95 has no IDE drives, or if memory requirements are really tight, you
96 could say N here, and select the "Old hard disk driver" below
97 instead to save about 13 KB of memory in the kernel.
98
99if BLK_DEV_IDE
100
1c10e938 101comment "Please see Documentation/ide/ide.txt for help/info on IDE drives"
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102
103config BLK_DEV_IDE_SATA
104 bool "Support for SATA (deprecated; conflicts with libata SATA driver)"
105 default n
106 ---help---
107 There are two drivers for Serial ATA controllers.
108
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109 The main driver, "libata", uses the SCSI subsystem
110 and supports most modern SATA controllers. In order to use it
111 you may take a look at "Serial ATA (prod) and Parallel ATA
112 (experimental) drivers".
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113
114 The IDE driver (which you are currently configuring) supports
115 a few first-generation SATA controllers.
116
117 In order to eliminate conflicts between the two subsystems,
118 this config option enables the IDE driver's SATA support.
119 Normally this is disabled, as it is preferred that libata
120 supports SATA controllers, and this (IDE) driver supports
121 PATA controllers.
122
123 If unsure, say N.
124
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125config BLK_DEV_IDEDISK
126 tristate "Include IDE/ATA-2 DISK support"
127 ---help---
128 This will include enhanced support for MFM/RLL/IDE hard disks. If
129 you have a MFM/RLL/IDE disk, and there is no special reason to use
130 the old hard disk driver instead, say Y. If you have an SCSI-only
131 system, you can say N here.
132
133 To compile this driver as a module, choose M here: the
134 module will be called ide-disk.
135 Do not compile this driver as a module if your root file system
136 (the one containing the directory /) is located on the IDE disk.
137
138 If unsure, say Y.
139
140config IDEDISK_MULTI_MODE
127ba289 141 bool "Use multiple sector mode for Programmed Input/Output by default"
1da177e4 142 help
127ba289
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143 This setting is irrelevant for most IDE disks, with direct memory
144 access, to which multiple sector mode does not apply. Multiple sector
145 mode is a feature of most modern IDE hard drives, permitting the
146 transfer of multiple sectors per Programmed Input/Output interrupt,
147 rather than the usual one sector per interrupt. When this feature is
148 enabled, it can reduce operating system overhead for disk Programmed
149 Input/Output. On some systems, it also can increase the data
150 throughput of Programmed Input/Output. Some drives, however, seemed
151 to run slower with multiple sector mode enabled. Some drives claimed
152 to support multiple sector mode, but lost data at some settings.
153 Under rare circumstances, such failures could result in massive
154 filesystem corruption.
155
156 If you get the following error, try to say Y here:
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157
158 hda: set_multmode: status=0x51 { DriveReady SeekComplete Error }
159 hda: set_multmode: error=0x04 { DriveStatusError }
160
161 If in doubt, say N.
162
163config BLK_DEV_IDECS
164 tristate "PCMCIA IDE support"
165 depends on PCMCIA
166 help
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167 Support for Compact Flash cards, outboard IDE disks, tape drives,
168 and CD-ROM drives connected through a PCMCIA card.
1da177e4 169
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170config BLK_DEV_DELKIN
171 tristate "Cardbus IDE support (Delkin/ASKA/Workbit)"
172 depends on CARDBUS && PCI
173 help
174 Support for Delkin, ASKA, and Workbit Cardbus CompactFlash
175 Adapters. This may also work for similar SD and XD adapters.
176
1da177e4
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177config BLK_DEV_IDECD
178 tristate "Include IDE/ATAPI CDROM support"
179 ---help---
180 If you have a CD-ROM drive using the ATAPI protocol, say Y. ATAPI is
181 a newer protocol used by IDE CD-ROM and TAPE drives, similar to the
182 SCSI protocol. Most new CD-ROM drives use ATAPI, including the
183 NEC-260, Mitsumi FX400, Sony 55E, and just about all non-SCSI
184 double(2X) or better speed drives.
185
186 If you say Y here, the CD-ROM drive will be identified at boot time
187 along with other IDE devices, as "hdb" or "hdc", or something
188 similar (check the boot messages with dmesg). If this is your only
189 CD-ROM drive, you can say N to all other CD-ROM options, but be sure
190 to say Y or M to "ISO 9660 CD-ROM file system support".
191
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192 To compile this driver as a module, choose M here: the
193 module will be called ide-cd.
194
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195config BLK_DEV_IDECD_VERBOSE_ERRORS
196 bool "Verbose error logging for IDE/ATAPI CDROM driver" if EMBEDDED
197 depends on BLK_DEV_IDECD
198 default y
199 help
200 Turn this on to have the driver print out the meanings of the
201 ATAPI error codes. This will use up additional 8kB of kernel-space
202 memory, though.
203
1da177e4 204config BLK_DEV_IDETAPE
4278c2d5 205 tristate "Include IDE/ATAPI TAPE support"
1da177e4
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206 help
207 If you have an IDE tape drive using the ATAPI protocol, say Y.
208 ATAPI is a newer protocol used by IDE tape and CD-ROM drives,
209 similar to the SCSI protocol. If you have an SCSI tape drive
210 however, you can say N here.
211
212 You should also say Y if you have an OnStream DI-30 tape drive; this
213 will not work with the SCSI protocol, until there is support for the
214 SC-30 and SC-50 versions.
215
216 If you say Y here, the tape drive will be identified at boot time
217 along with other IDE devices, as "hdb" or "hdc", or something
218 similar, and will be mapped to a character device such as "ht0"
219 (check the boot messages with dmesg). Be sure to consult the
1c10e938
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220 <file:drivers/ide/ide-tape.c> and <file:Documentation/ide/ide.txt>
221 files for usage information.
1da177e4
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222
223 To compile this driver as a module, choose M here: the
224 module will be called ide-tape.
225
226config BLK_DEV_IDEFLOPPY
227 tristate "Include IDE/ATAPI FLOPPY support"
228 ---help---
229 If you have an IDE floppy drive which uses the ATAPI protocol,
230 answer Y. ATAPI is a newer protocol used by IDE CD-ROM/tape/floppy
231 drives, similar to the SCSI protocol.
232
233 The LS-120 and the IDE/ATAPI Iomega ZIP drive are also supported by
234 this driver. For information about jumper settings and the question
235 of when a ZIP drive uses a partition table, see
236 <http://www.win.tue.nl/~aeb/linux/zip/zip-1.html>.
237 (ATAPI PD-CD/CDR drives are not supported by this driver; support
238 for PD-CD/CDR drives is available if you answer Y to
239 "SCSI emulation support", below).
240
241 If you say Y here, the FLOPPY drive will be identified along with
242 other IDE devices, as "hdb" or "hdc", or something similar (check
243 the boot messages with dmesg).
244
245 To compile this driver as a module, choose M here: the
246 module will be called ide-floppy.
247
248config BLK_DEV_IDESCSI
249 tristate "SCSI emulation support"
250 depends on SCSI
251 ---help---
252 WARNING: ide-scsi is no longer needed for cd writing applications!
253 The 2.6 kernel supports direct writing to ide-cd, which eliminates
254 the need for ide-scsi + the entire scsi stack just for writing a
255 cd. The new method is more efficient in every way.
256
257 This will provide SCSI host adapter emulation for IDE ATAPI devices,
258 and will allow you to use a SCSI device driver instead of a native
259 ATAPI driver.
260
261 This is useful if you have an ATAPI device for which no native
262 driver has been written (for example, an ATAPI PD-CD drive);
263 you can then use this emulation together with an appropriate SCSI
264 device driver. In order to do this, say Y here and to "SCSI support"
265 and "SCSI generic support", below. You must then provide the kernel
266 command line "hdx=ide-scsi" (try "man bootparam" or see the
267 documentation of your boot loader (lilo or loadlin) about how to
268 pass options to the kernel at boot time) for devices if you want the
269 native EIDE sub-drivers to skip over the native support, so that
270 this SCSI emulation can be used instead.
271
272 Note that this option does NOT allow you to attach SCSI devices to a
273 box that doesn't have a SCSI host adapter installed.
274
275 If both this SCSI emulation and native ATAPI support are compiled
276 into the kernel, the native support will be used.
277
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278config BLK_DEV_IDEACPI
279 bool "IDE ACPI support"
280 depends on ACPI
281 ---help---
282 Implement ACPI support for generic IDE devices. On modern
283 machines ACPI support is required to properly handle ACPI S3 states.
284
1da177e4
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285config IDE_TASK_IOCTL
286 bool "IDE Taskfile Access"
287 help
288 This is a direct raw access to the media. It is a complex but
289 elegant solution to test and validate the domain of the hardware and
3b6ce249 290 perform below the driver data recovery if needed. This is the most
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291 basic form of media-forensics.
292
293 If you are unsure, say N here.
294
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295config IDE_PROC_FS
296 bool "legacy /proc/ide/ support"
297 depends on IDE && PROC_FS
298 default y
299 help
300 This option enables support for the various files in
301 /proc/ide. In Linux 2.6 this has been superseded by
302 files in sysfs but many legacy applications rely on this.
303
304 If unsure say Y.
305
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306comment "IDE chipset support/bugfixes"
307
308config IDE_GENERIC
309 tristate "generic/default IDE chipset support"
486c92e2 310 depends on ALPHA || X86 || IA64 || M32R || MIPS || PPC32
1da177e4 311 help
82a0e70e 312 If unsure, say N.
1da177e4 313
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314config BLK_DEV_PLATFORM
315 tristate "Platform driver for IDE interfaces"
316 help
317 This is the platform IDE driver, used mostly for Memory Mapped
318 IDE devices, like Compact Flashes running in True IDE mode.
319
320 If unsure, say N.
321
1da177e4 322config BLK_DEV_CMD640
ade2daf9 323 tristate "CMD640 chipset bugfix/support"
1da177e4
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324 depends on X86
325 ---help---
326 The CMD-Technologies CMD640 IDE chip is used on many common 486 and
327 Pentium motherboards, usually in combination with a "Neptune" or
328 "SiS" chipset. Unfortunately, it has a number of rather nasty
329 design flaws that can cause severe data corruption under many common
330 conditions. Say Y here to include code which tries to automatically
331 detect and correct the problems under Linux. This option also
332 enables access to the secondary IDE ports in some CMD640 based
333 systems.
334
335 This driver will work automatically in PCI based systems (most new
336 systems have PCI slots). But if your system uses VESA local bus
337 (VLB) instead of PCI, you must also supply a kernel boot parameter
338 to enable the CMD640 bugfix/support: "ide0=cmd640_vlb". (Try "man
339 bootparam" or see the documentation of your boot loader about how to
340 pass options to the kernel.)
341
342 The CMD640 chip is also used on add-in cards by Acculogic, and on
343 the "CSA-6400E PCI to IDE controller" that some people have. For
1c10e938 344 details, read <file:Documentation/ide/ide.txt>.
1da177e4
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345
346config BLK_DEV_CMD640_ENHANCED
347 bool "CMD640 enhanced support"
348 depends on BLK_DEV_CMD640
349 help
350 This option includes support for setting/autotuning PIO modes and
351 prefetch on CMD640 IDE interfaces. For details, read
1c10e938 352 <file:Documentation/ide/ide.txt>. If you have a CMD640 IDE interface
1da177e4
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353 and your BIOS does not already do this for you, then say Y here.
354 Otherwise say N.
355
356config BLK_DEV_IDEPNP
ade2daf9 357 tristate "PNP EIDE support"
1da177e4
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358 depends on PNP
359 help
360 If you have a PnP (Plug and Play) compatible EIDE card and
361 would like the kernel to automatically detect and activate
362 it, say Y here.
363
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364config BLK_DEV_IDEDMA_SFF
365 bool
366
842c19ad
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367if PCI
368
369comment "PCI IDE chipsets support"
370
1da177e4 371config BLK_DEV_IDEPCI
842c19ad 372 bool
1da177e4 373
6d208b39 374config IDEPCI_PCIBUS_ORDER
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375 bool "Probe IDE PCI devices in the PCI bus order (DEPRECATED)"
376 depends on BLK_DEV_IDE=y && BLK_DEV_IDEPCI
377 default y
378 help
379 Probe IDE PCI devices in the order in which they appear on the
380 PCI bus (i.e. 00:1f.1 PCI device before 02:01.0 PCI device)
381 instead of the order in which IDE PCI host drivers are loaded.
382
383 Please note that this method of assuring stable naming of
384 IDE devices is unreliable and use other means for achieving
385 it (i.e. udev).
386
387 If in doubt, say N.
6d208b39 388
f7d7f3fd 389# TODO: split it on per host driver config options (or module parameters)
1da177e4 390config BLK_DEV_OFFBOARD
46255d40 391 bool "Boot off-board chipsets first support (DEPRECATED)"
f7d7f3fd 392 depends on BLK_DEV_IDEPCI && (BLK_DEV_AEC62XX || BLK_DEV_GENERIC || BLK_DEV_HPT34X || BLK_DEV_HPT366 || BLK_DEV_PDC202XX_NEW || BLK_DEV_PDC202XX_OLD || BLK_DEV_TC86C001)
1da177e4
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393 help
394 Normally, IDE controllers built into the motherboard (on-board
395 controllers) are assigned to ide0 and ide1 while those on add-in PCI
396 cards (off-board controllers) are relegated to ide2 and ide3.
397 Answering Y here will allow you to reverse the situation, with
398 off-board controllers on ide0/1 and on-board controllers on ide2/3.
399 This can improve the usability of some boot managers such as lilo
400 when booting from a drive on an off-board controller.
401
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402 Note that, if you do this, the order of the hd* devices will be
403 rearranged which may require modification of fstab and other files.
404
46255d40
BZ
405 Please also note that this method of assuring stable naming of
406 IDE devices is unreliable and use other means for achieving it
407 (i.e. udev).
408
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409 If in doubt, say N.
410
411config BLK_DEV_GENERIC
412 tristate "Generic PCI IDE Chipset Support"
842c19ad 413 select BLK_DEV_IDEPCI
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414 help
415 This option provides generic support for various PCI IDE Chipsets
416 which otherwise might not be supported.
1da177e4
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417
418config BLK_DEV_OPTI621
419 tristate "OPTi 82C621 chipset enhanced support (EXPERIMENTAL)"
842c19ad
BZ
420 depends on EXPERIMENTAL
421 select BLK_DEV_IDEPCI
1da177e4
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422 help
423 This is a driver for the OPTi 82C621 EIDE controller.
424 Please read the comments at the top of <file:drivers/ide/pci/opti621.c>.
425
426config BLK_DEV_RZ1000
427 tristate "RZ1000 chipset bugfix/support"
842c19ad
BZ
428 depends on X86
429 select BLK_DEV_IDEPCI
1da177e4
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430 help
431 The PC-Technologies RZ1000 IDE chip is used on many common 486 and
432 Pentium motherboards, usually along with the "Neptune" chipset.
433 Unfortunately, it has a rather nasty design flaw that can cause
434 severe data corruption under many conditions. Say Y here to include
435 code which automatically detects and corrects the problem under
436 Linux. This may slow disk throughput by a few percent, but at least
437 things will operate 100% reliably.
438
1da177e4 439config BLK_DEV_IDEDMA_PCI
842c19ad
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440 bool
441 select BLK_DEV_IDEPCI
8e882ba1 442 select BLK_DEV_IDEDMA_SFF
1da177e4 443
1da177e4
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444config BLK_DEV_AEC62XX
445 tristate "AEC62XX chipset support"
842c19ad 446 select BLK_DEV_IDEDMA_PCI
1da177e4
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447 help
448 This driver adds explicit support for Acard AEC62xx (Artop ATP8xx)
449 IDE controllers. This allows the kernel to change PIO, DMA and UDMA
450 speeds and to configure the chip to optimum performance.
451
452config BLK_DEV_ALI15X3
453 tristate "ALI M15x3 chipset support"
842c19ad 454 select BLK_DEV_IDEDMA_PCI
1da177e4
LT
455 help
456 This driver ensures (U)DMA support for ALI 1533, 1543 and 1543C
457 onboard chipsets. It also tests for Simplex mode and enables
458 normal dual channel support.
459
460 If you say Y here, you also need to say Y to "Use DMA by default
461 when available", above. Please read the comments at the top of
462 <file:drivers/ide/pci/alim15x3.c>.
463
464 If unsure, say N.
465
466config WDC_ALI15X3
467 bool "ALI M15x3 WDC support (DANGEROUS)"
468 depends on BLK_DEV_ALI15X3
469 ---help---
470 This allows for UltraDMA support for WDC drives that ignore CRC
471 checking. You are a fool for enabling this option, but there have
472 been requests. DO NOT COMPLAIN IF YOUR DRIVE HAS FS CORRUPTION, IF
473 YOU ENABLE THIS! No one will listen, just laugh for ignoring this
474 SERIOUS WARNING.
475
476 Using this option can allow WDC drives to run at ATA-4/5 transfer
477 rates with only an ATA-2 support structure.
478
479 SAY N!
480
481config BLK_DEV_AMD74XX
482 tristate "AMD and nVidia IDE support"
91302010 483 depends on !ARM
842c19ad 484 select BLK_DEV_IDEDMA_PCI
1da177e4
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485 help
486 This driver adds explicit support for AMD-7xx and AMD-8111 chips
487 and also for the nVidia nForce chip. This allows the kernel to
488 change PIO, DMA and UDMA speeds and to configure the chip to
489 optimum performance.
490
491config BLK_DEV_ATIIXP
492 tristate "ATI IXP chipset IDE support"
493 depends on X86
842c19ad 494 select BLK_DEV_IDEDMA_PCI
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495 help
496 This driver adds explicit support for ATI IXP chipset.
497 This allows the kernel to change PIO, DMA and UDMA speeds
498 and to configure the chip to optimum performance.
499
500 Say Y here if you have an ATI IXP chipset IDE controller.
501
502config BLK_DEV_CMD64X
503 tristate "CMD64{3|6|8|9} chipset support"
842c19ad 504 select BLK_DEV_IDEDMA_PCI
1da177e4
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505 help
506 Say Y here if you have an IDE controller which uses any of these
507 chipsets: CMD643, CMD646, or CMD648.
508
509config BLK_DEV_TRIFLEX
510 tristate "Compaq Triflex IDE support"
842c19ad 511 select BLK_DEV_IDEDMA_PCI
1da177e4
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512 help
513 Say Y here if you have a Compaq Triflex IDE controller, such
514 as those commonly found on Compaq Pentium-Pro systems
515
516config BLK_DEV_CY82C693
517 tristate "CY82C693 chipset support"
842c19ad 518 select BLK_DEV_IDEDMA_PCI
1da177e4
LT
519 help
520 This driver adds detection and support for the CY82C693 chipset
521 used on Digital's PC-Alpha 164SX boards.
522
523 If you say Y here, you need to say Y to "Use DMA by default
524 when available" as well.
525
526config BLK_DEV_CS5520
527 tristate "Cyrix CS5510/20 MediaGX chipset support (VERY EXPERIMENTAL)"
528 depends on EXPERIMENTAL
842c19ad 529 select BLK_DEV_IDEDMA_PCI
1da177e4 530 help
3b6ce249 531 Include support for PIO tuning and virtual DMA on the Cyrix MediaGX
1da177e4
LT
532 5510/5520 chipset. This will automatically be detected and
533 configured if found.
534
535 It is safe to say Y to this question.
536
537config BLK_DEV_CS5530
538 tristate "Cyrix/National Semiconductor CS5530 MediaGX chipset support"
842c19ad 539 select BLK_DEV_IDEDMA_PCI
1da177e4
LT
540 help
541 Include support for UDMA on the Cyrix MediaGX 5530 chipset. This
542 will automatically be detected and configured if found.
543
544 It is safe to say Y to this question.
545
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546config BLK_DEV_CS5535
547 tristate "AMD CS5535 chipset support"
548 depends on X86 && !X86_64
842c19ad 549 select BLK_DEV_IDEDMA_PCI
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550 help
551 Include support for UDMA on the NSC/AMD CS5535 companion chipset.
552 This will automatically be detected and configured if found.
553
554 It is safe to say Y to this question.
555
1da177e4
LT
556config BLK_DEV_HPT34X
557 tristate "HPT34X chipset support"
842c19ad 558 select BLK_DEV_IDEDMA_PCI
1da177e4
LT
559 help
560 This driver adds up to 4 more EIDE devices sharing a single
561 interrupt. The HPT343 chipset in its current form is a non-bootable
562 controller; the HPT345/HPT363 chipset is a bootable (needs BIOS FIX)
563 PCI UDMA controllers. This driver requires dynamic tuning of the
564 chipset during the ide-probe at boot time. It is reported to support
565 DVD II drives, by the manufacturer.
566
567config HPT34X_AUTODMA
568 bool "HPT34X AUTODMA support (EXPERIMENTAL)"
569 depends on BLK_DEV_HPT34X && EXPERIMENTAL
570 help
571 This is a dangerous thing to attempt currently! Please read the
572 comments at the top of <file:drivers/ide/pci/hpt34x.c>. If you say Y
573 here, then say Y to "Use DMA by default when available" as well.
574
575 If unsure, say N.
576
577config BLK_DEV_HPT366
578 tristate "HPT36X/37X chipset support"
842c19ad
BZ
579 select BLK_DEV_IDEDMA_PCI
580 help
1da177e4
LT
581 HPT366 is an Ultra DMA chipset for ATA-66.
582 HPT368 is an Ultra DMA chipset for ATA-66 RAID Based.
583 HPT370 is an Ultra DMA chipset for ATA-100.
584 HPT372 is an Ultra DMA chipset for ATA-100.
585 HPT374 is an Ultra DMA chipset for ATA-100.
586
587 This driver adds up to 4 more EIDE devices sharing a single
588 interrupt.
589
590 The HPT366 chipset in its current form is bootable. One solution
591 for this problem are special LILO commands for redirecting the
592 reference to device 0x80. The other solution is to say Y to "Boot
593 off-board chipsets first support" (CONFIG_BLK_DEV_OFFBOARD) unless
594 your mother board has the chipset natively mounted. Regardless one
a594eeb1 595 should use the fore mentioned option and call at LILO.
1da177e4
LT
596
597 This driver requires dynamic tuning of the chipset during the
598 ide-probe at boot. It is reported to support DVD II drives, by the
599 manufacturer.
600
bbb3bbdb
AC
601config BLK_DEV_JMICRON
602 tristate "JMicron JMB36x support"
842c19ad 603 select BLK_DEV_IDEDMA_PCI
bbb3bbdb
AC
604 help
605 Basic support for the JMicron ATA controllers. For full support
606 use the libata drivers.
607
1da177e4
LT
608config BLK_DEV_SC1200
609 tristate "National SCx200 chipset support"
842c19ad 610 select BLK_DEV_IDEDMA_PCI
1da177e4 611 help
e665d505
FP
612 This driver adds support for the on-board IDE controller on the
613 National SCx200 series of embedded x86 "Geode" systems.
1da177e4
LT
614
615config BLK_DEV_PIIX
616 tristate "Intel PIIXn chipsets support"
842c19ad 617 select BLK_DEV_IDEDMA_PCI
1da177e4
LT
618 help
619 This driver adds explicit support for Intel PIIX and ICH chips
620 and also for the Efar Victory66 (slc90e66) chip. This allows
621 the kernel to change PIO, DMA and UDMA speeds and to configure
622 the chip to optimum performance.
623
9c6712c0
JL
624config BLK_DEV_IT8213
625 tristate "IT8213 IDE support"
842c19ad 626 select BLK_DEV_IDEDMA_PCI
9c6712c0
JL
627 help
628 This driver adds support for the ITE 8213 IDE controller.
629
da9091ee
AC
630config BLK_DEV_IT821X
631 tristate "IT821X IDE support"
842c19ad 632 select BLK_DEV_IDEDMA_PCI
da9091ee
AC
633 help
634 This driver adds support for the ITE 8211 IDE controller and the
635 IT 8212 IDE RAID controller in both RAID and pass-through mode.
636
1da177e4
LT
637config BLK_DEV_NS87415
638 tristate "NS87415 chipset support"
842c19ad 639 select BLK_DEV_IDEDMA_PCI
1da177e4
LT
640 help
641 This driver adds detection and support for the NS87415 chip
41df8940 642 (used mainly on SPARC64 and PA-RISC machines).
1da177e4
LT
643
644 Please read the comments at the top of <file:drivers/ide/pci/ns87415.c>.
645
646config BLK_DEV_PDC202XX_OLD
647 tristate "PROMISE PDC202{46|62|65|67} support"
842c19ad 648 select BLK_DEV_IDEDMA_PCI
1da177e4
LT
649 help
650 Promise Ultra33 or PDC20246
651 Promise Ultra66 or PDC20262
652 Promise Ultra100 or PDC20265/PDC20267/PDC20268
653
654 This driver adds up to 4 more EIDE devices sharing a single
655 interrupt. This add-on card is a bootable PCI UDMA controller. Since
656 multiple cards can be installed and there are BIOS ROM problems that
657 happen if the BIOS revisions of all installed cards (three-max) do
658 not match, the driver attempts to do dynamic tuning of the chipset
659 at boot-time for max-speed. Ultra33 BIOS 1.25 or newer is required
660 for more than one card. This card may require that you say Y to
661 "Special UDMA Feature".
662
663 If you say Y here, you need to say Y to "Use DMA by default when
664 available" as well.
665
666 Please read the comments at the top of
667 <file:drivers/ide/pci/pdc202xx_old.c>.
668
669 If unsure, say N.
670
1da177e4
LT
671config BLK_DEV_PDC202XX_NEW
672 tristate "PROMISE PDC202{68|69|70|71|75|76|77} support"
842c19ad 673 select BLK_DEV_IDEDMA_PCI
1da177e4 674
1da177e4
LT
675config BLK_DEV_SVWKS
676 tristate "ServerWorks OSB4/CSB5/CSB6 chipsets support"
842c19ad 677 select BLK_DEV_IDEDMA_PCI
1da177e4
LT
678 help
679 This driver adds PIO/(U)DMA support for the ServerWorks OSB4/CSB5
680 chipsets.
681
682config BLK_DEV_SGIIOC4
e5d310b3
BC
683 tristate "Silicon Graphics IOC4 chipset ATA/ATAPI support"
684 depends on (IA64_SGI_SN2 || IA64_GENERIC) && SGI_IOC4
842c19ad 685 select BLK_DEV_IDEDMA_PCI
1da177e4
LT
686 help
687 This driver adds PIO & MultiMode DMA-2 support for the SGI IOC4
688 chipset, which has one channel and can support two devices.
689 Please say Y here if you have an Altix System from SGI.
690
691config BLK_DEV_SIIMAGE
692 tristate "Silicon Image chipset support"
842c19ad 693 select BLK_DEV_IDEDMA_PCI
1da177e4
LT
694 help
695 This driver adds PIO/(U)DMA support for the SI CMD680 and SII
696 3112 (Serial ATA) chips.
697
698config BLK_DEV_SIS5513
699 tristate "SiS5513 chipset support"
700 depends on X86
842c19ad
BZ
701 select BLK_DEV_IDEDMA_PCI
702 help
1da177e4
LT
703 This driver ensures (U)DMA support for SIS5513 chipset family based
704 mainboards.
705
706 The following chipsets are supported:
707 ATA16: SiS5511, SiS5513
708 ATA33: SiS5591, SiS5597, SiS5598, SiS5600
709 ATA66: SiS530, SiS540, SiS620, SiS630, SiS640
710 ATA100: SiS635, SiS645, SiS650, SiS730, SiS735, SiS740,
711 SiS745, SiS750
712
713 If you say Y here, you need to say Y to "Use DMA by default when
714 available" as well.
715
716 Please read the comments at the top of <file:drivers/ide/pci/sis5513.c>.
717
9468f687
OH
718config BLK_DEV_SL82C105
719 tristate "Winbond SL82c105 support"
720 depends on (PPC || ARM)
842c19ad 721 select BLK_DEV_IDEDMA_PCI
9468f687
OH
722 help
723 If you have a Winbond SL82c105 IDE controller, say Y here to enable
724 special configuration for this chip. This is common on various CHRP
725 motherboards, but could be used elsewhere. If in doubt, say Y.
726
1da177e4
LT
727config BLK_DEV_SLC90E66
728 tristate "SLC90E66 chipset support"
842c19ad 729 select BLK_DEV_IDEDMA_PCI
1da177e4 730 help
3b6ce249 731 This driver ensures (U)DMA support for Victory66 SouthBridges for
1da177e4
LT
732 SMsC with Intel NorthBridges. This is an Ultra66 based chipset.
733 The nice thing about it is that you can mix Ultra/DMA/PIO devices
734 and it will handle timing cycles. Since this is an improved
735 look-a-like to the PIIX4 it should be a nice addition.
736
737 If you say Y here, you need to say Y to "Use DMA by default when
738 available" as well.
739
740 Please read the comments at the top of
741 <file:drivers/ide/pci/slc90e66.c>.
742
743config BLK_DEV_TRM290
744 tristate "Tekram TRM290 chipset support"
842c19ad 745 select BLK_DEV_IDEDMA_PCI
1da177e4
LT
746 help
747 This driver adds support for bus master DMA transfers
748 using the Tekram TRM290 PCI IDE chip. Volunteers are
749 needed for further tweaking and development.
750 Please read the comments at the top of <file:drivers/ide/pci/trm290.c>.
751
752config BLK_DEV_VIA82CXXX
753 tristate "VIA82CXXX chipset support"
842c19ad 754 select BLK_DEV_IDEDMA_PCI
1da177e4
LT
755 help
756 This driver adds explicit support for VIA BusMastering IDE chips.
757 This allows the kernel to change PIO, DMA and UDMA speeds and to
758 configure the chip to optimum performance.
759
33dced2e
SS
760config BLK_DEV_TC86C001
761 tristate "Toshiba TC86C001 support"
842c19ad 762 select BLK_DEV_IDEDMA_PCI
33dced2e
SS
763 help
764 This driver adds support for Toshiba TC86C001 GOKU-S chip.
765
a1067db8
KI
766config BLK_DEV_CELLEB
767 tristate "Toshiba's Cell Reference Set IDE support"
768 depends on PPC_CELLEB
842c19ad 769 select BLK_DEV_IDEDMA_PCI
a1067db8 770 help
e665d505 771 This driver provides support for the on-board IDE controller on
a1067db8
KI
772 Toshiba Cell Reference Board.
773 If unsure, say Y.
774
1da177e4
LT
775endif
776
777config BLK_DEV_IDE_PMAC
e665d505 778 tristate "PowerMac on-board IDE support"
6c28c1f5 779 depends on PPC_PMAC && IDE=y && BLK_DEV_IDE=y
1da177e4 780 help
e665d505 781 This driver provides support for the on-board IDE controller on
1da177e4
LT
782 most of the recent Apple Power Macintoshes and PowerBooks.
783 If unsure, say Y.
784
785config BLK_DEV_IDE_PMAC_ATA100FIRST
e665d505 786 bool "Probe on-board ATA/100 (Kauai) first"
1da177e4
LT
787 depends on BLK_DEV_IDE_PMAC
788 help
789 This option will cause the ATA/100 controller found in UniNorth2
790 based machines (Windtunnel PowerMac, Aluminium PowerBooks, ...)
791 to be probed before the ATA/66 and ATA/33 controllers. Without
792 these, those machine used to have the hard disk on hdc and the
793 CD-ROM on hda. This option changes this to more natural hda for
794 hard disk and hdc for CD-ROM.
795
796config BLK_DEV_IDEDMA_PMAC
797 bool "PowerMac IDE DMA support"
798 depends on BLK_DEV_IDE_PMAC
0ac72b35 799 select BLK_DEV_IDEDMA_PCI
1da177e4 800 help
e665d505 801 This option allows the driver for the on-board IDE controller on
1da177e4
LT
802 Power Macintoshes and PowerBooks to use DMA (direct memory access)
803 to transfer data to and from memory. Saying Y is safe and improves
804 performance.
805
4237f229
RB
806config BLK_DEV_IDE_SWARM
807 tristate "IDE for Sibyte evaluation boards"
808 depends on SIBYTE_SB1xxx_SOC
809
26a940e2
PP
810config BLK_DEV_IDE_AU1XXX
811 bool "IDE for AMD Alchemy Au1200"
812 depends on SOC_AU1200
813choice
814 prompt "IDE Mode for AMD Alchemy Au1200"
815 default CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
816 depends on SOC_AU1200 && BLK_DEV_IDE_AU1XXX
817
818config BLK_DEV_IDE_AU1XXX_PIO_DBDMA
819 bool "PIO+DbDMA IDE for AMD Alchemy Au1200"
820
821config BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
822 bool "MDMA2+DbDMA IDE for AMD Alchemy Au1200"
823 depends on SOC_AU1200 && BLK_DEV_IDE_AU1XXX
824endchoice
825
26a940e2
PP
826config BLK_DEV_IDE_AU1XXX_SEQTS_PER_RQ
827 int "Maximum transfer size (KB) per request (up to 128)"
828 default "128"
bef1f402 829 depends on BLK_DEV_IDE_AU1XXX
26a940e2 830
1da177e4 831config IDE_ARM
ade2daf9
BZ
832 tristate "ARM IDE support"
833 depends on ARM && (ARCH_CLPS7500 || ARCH_RPC || ARCH_SHARK)
834 default y
1da177e4
LT
835
836config BLK_DEV_IDE_ICSIDE
837 tristate "ICS IDE interface support"
838 depends on ARM && ARCH_ACORN
839 help
840 On Acorn systems, say Y here if you wish to use the ICS IDE
841 interface card. This is not required for ICS partition support.
842 If you are unsure, say N to this.
843
844config BLK_DEV_IDEDMA_ICS
845 bool "ICS DMA support"
846 depends on BLK_DEV_IDE_ICSIDE
847 help
848 Say Y here if you want to add DMA (Direct Memory Access) support to
849 the ICS IDE driver.
850
1da177e4
LT
851config BLK_DEV_IDE_RAPIDE
852 tristate "RapIDE interface support"
853 depends on ARM && ARCH_ACORN
854 help
855 Say Y here if you want to support the Yellowstone RapIDE controller
856 manufactured for use with Acorn computers.
857
858config BLK_DEV_IDE_BAST
859 tristate "Simtec BAST / Thorcom VR1000 IDE support"
860 depends on ARM && (ARCH_BAST || MACH_VR1000)
861 help
862 Say Y here if you want to support the onboard IDE channels on the
863 Simtec BAST or the Thorcom VR1000
864
c03a9278 865config ETRAX_IDE
ade2daf9 866 tristate "ETRAX IDE support"
c03a9278
BZ
867 depends on CRIS && BROKEN
868 select BLK_DEV_IDEDMA
c03a9278
BZ
869 help
870 Enables the ETRAX IDE driver.
871
872 You can't use parallel ports or SCSI ports at the same time.
873
874config ETRAX_IDE_DELAY
875 int "Delay for drives to regain consciousness"
876 depends on ETRAX_IDE && ETRAX_ARCH_V10
877 default 15
878 help
879 Number of seconds to wait for IDE drives to spin up after an IDE
880 reset.
881
882choice
883 prompt "IDE reset pin"
884 depends on ETRAX_IDE && ETRAX_ARCH_V10
885 default ETRAX_IDE_PB7_RESET
886
887config ETRAX_IDE_PB7_RESET
888 bool "Port_PB_Bit_7"
889 help
890 IDE reset on pin 7 on port B
891
892config ETRAX_IDE_G27_RESET
893 bool "Port_G_Bit_27"
894 help
895 IDE reset on pin 27 on port G
896
897endchoice
898
acfad6e1 899config IDE_H8300
ade2daf9 900 tristate "H8300 IDE support"
acfad6e1 901 depends on H8300
acfad6e1
BZ
902 default y
903 help
904 Enables the H8300 IDE driver.
905
1da177e4 906config BLK_DEV_GAYLE
ade2daf9 907 tristate "Amiga Gayle IDE interface support"
1da177e4
LT
908 depends on AMIGA
909 help
910 This is the IDE driver for the Amiga Gayle IDE interface. It supports
911 both the `A1200 style' and `A4000 style' of the Gayle IDE interface,
e665d505 912 This includes on-board IDE interfaces on some Amiga models (A600,
1da177e4
LT
913 A1200, A4000, and A4000T), and IDE interfaces on the Zorro expansion
914 bus (M-Tech E-Matrix 530 expansion card).
915 Say Y if you have an Amiga with a Gayle IDE interface and want to use
916 IDE devices (hard disks, CD-ROM drives, etc.) that are connected to
917 it.
918 Note that you also have to enable Zorro bus support if you want to
919 use Gayle IDE interfaces on the Zorro expansion bus.
920
921config BLK_DEV_IDEDOUBLER
922 bool "Amiga IDE Doubler support (EXPERIMENTAL)"
923 depends on BLK_DEV_GAYLE && EXPERIMENTAL
924 ---help---
925 This driver provides support for the so-called `IDE doublers' (made
e665d505
FP
926 by various manufacturers, e.g. Eyetech) that can be connected to
927 the on-board IDE interface of some Amiga models. Using such an IDE
928 doubler, you can connect up to four instead of two IDE devices to
929 the Amiga's on-board IDE interface.
1da177e4
LT
930
931 Note that the normal Amiga Gayle IDE driver may not work correctly
932 if you have an IDE doubler and don't enable this driver!
933
934 Say Y if you have an IDE doubler. The driver is enabled at kernel
935 runtime using the "ide=doubler" kernel boot parameter.
936
937config BLK_DEV_BUDDHA
ade2daf9 938 tristate "Buddha/Catweasel/X-Surf IDE interface support (EXPERIMENTAL)"
1da177e4
LT
939 depends on ZORRO && EXPERIMENTAL
940 help
e665d505
FP
941 This is the IDE driver for the IDE interfaces on the Buddha, Catweasel
942 and X-Surf expansion boards. It supports up to two interfaces on the
943 Buddha, three on the Catweasel and two on the X-Surf.
1da177e4
LT
944
945 Say Y if you have a Buddha or Catweasel expansion board and want to
946 use IDE devices (hard disks, CD-ROM drives, etc.) that are connected
947 to one of its IDE interfaces.
948
949config BLK_DEV_FALCON_IDE
ade2daf9 950 tristate "Falcon IDE interface support"
1da177e4
LT
951 depends on ATARI
952 help
e665d505 953 This is the IDE driver for the on-board IDE interface on the Atari
1da177e4 954 Falcon. Say Y if you have a Falcon and want to use IDE devices (hard
e665d505 955 disks, CD-ROM drives, etc.) that are connected to the on-board IDE
1da177e4
LT
956 interface.
957
958config BLK_DEV_MAC_IDE
ade2daf9 959 tristate "Macintosh Quadra/Powerbook IDE interface support"
1da177e4
LT
960 depends on MAC
961 help
e665d505 962 This is the IDE driver for the on-board IDE interface on some m68k
1da177e4
LT
963 Macintosh models. It supports both the `Quadra style' (used in
964 Quadra/ Centris 630 and Performa 588 models) and `Powerbook style'
965 (used in the Powerbook 150 and 190 models) IDE interface.
966
967 Say Y if you have such an Macintosh model and want to use IDE
968 devices (hard disks, CD-ROM drives, etc.) that are connected to the
e665d505 969 on-board IDE interface.
1da177e4
LT
970
971config BLK_DEV_Q40IDE
ade2daf9 972 tristate "Q40/Q60 IDE interface support"
1da177e4
LT
973 depends on Q40
974 help
975 Enable the on-board IDE controller in the Q40/Q60. This should
976 normally be on; disable it only if you are running a custom hard
977 drive subsystem through an expansion card.
978
7c7e92a9
AS
979config BLK_DEV_PALMCHIP_BK3710
980 tristate "Palmchip bk3710 IDE controller support"
981 depends on ARCH_DAVINCI
8e882ba1 982 select BLK_DEV_IDEDMA_SFF
7c7e92a9
AS
983 help
984 Say Y here if you want to support the onchip IDE controller on the
985 TI DaVinci SoC
986
987
1da177e4 988config BLK_DEV_MPC8xx_IDE
ade2daf9 989 tristate "MPC8xx IDE support"
c5d252cb 990 depends on 8xx && (LWMON || IVMS8 || IVML24 || TQM8xxL) && IDE=y && BLK_DEV_IDE=y && !PPC_MERGE
1da177e4
LT
991 help
992 This option provides support for IDE on Motorola MPC8xx Systems.
993 Please see 'Type of MPC8xx IDE interface' for details.
994
995 If unsure, say N.
996
997choice
998 prompt "Type of MPC8xx IDE interface"
999 depends on BLK_DEV_MPC8xx_IDE
1000 default IDE_8xx_PCCARD
1001
1002config IDE_8xx_PCCARD
1003 bool "8xx_PCCARD"
1004 ---help---
1005 Select how the IDE devices are connected to the MPC8xx system:
1006
1007 8xx_PCCARD uses the 8xx internal PCMCIA interface in combination
1008 with a PC Card (e.g. ARGOSY portable Hard Disk Adapter),
1009 ATA PC Card HDDs or ATA PC Flash Cards (example: TQM8xxL
1010 systems)
1011
1012 8xx_DIRECT is used for directly connected IDE devices using the 8xx
1013 internal PCMCIA interface (example: IVMS8 systems)
1014
1015 EXT_DIRECT is used for IDE devices directly connected to the 8xx
1016 bus using some glue logic, but _not_ the 8xx internal
1017 PCMCIA interface (example: IDIF860 systems)
1018
1019config IDE_8xx_DIRECT
1020 bool "8xx_DIRECT"
1021
1022config IDE_EXT_DIRECT
1023 bool "EXT_DIRECT"
1024
1025endchoice
1026
1027# no isa -> no vlb
e4079df0 1028if ISA && (ALPHA || X86 || MIPS)
1da177e4 1029
842c19ad 1030comment "Other IDE chipsets support"
1da177e4
LT
1031comment "Note: most of these also require special kernel boot parameters"
1032
1033config BLK_DEV_4DRIVES
1034 bool "Generic 4 drives/port support"
1035 help
1036 Certain older chipsets, including the Tekram 690CD, use a single set
1037 of I/O ports at 0x1f0 to control up to four drives, instead of the
1038 customary two drives per port. Support for this can be enabled at
ffd4f6f0
BZ
1039 runtime using the "ide-4drives.probe" kernel boot parameter if you
1040 say Y here.
1da177e4
LT
1041
1042config BLK_DEV_ALI14XX
1043 tristate "ALI M14xx support"
1044 help
84913882 1045 This driver is enabled at runtime using the "ali14xx.probe" kernel
1da177e4
LT
1046 boot parameter. It enables support for the secondary IDE interface
1047 of the ALI M1439/1443/1445/1487/1489 chipsets, and permits faster
1c10e938
RD
1048 I/O speeds to be set as well.
1049 See the files <file:Documentation/ide/ide.txt> and
1050 <file:drivers/ide/legacy/ali14xx.c> for more info.
1da177e4
LT
1051
1052config BLK_DEV_DTC2278
1053 tristate "DTC-2278 support"
1054 help
84913882 1055 This driver is enabled at runtime using the "dtc2278.probe" kernel
1da177e4
LT
1056 boot parameter. It enables support for the secondary IDE interface
1057 of the DTC-2278 card, and permits faster I/O speeds to be set as
1c10e938 1058 well. See the <file:Documentation/ide/ide.txt> and
1da177e4
LT
1059 <file:drivers/ide/legacy/dtc2278.c> files for more info.
1060
1061config BLK_DEV_HT6560B
1062 tristate "Holtek HT6560B support"
1063 help
84913882 1064 This driver is enabled at runtime using the "ht6560b.probe" kernel
1da177e4
LT
1065 boot parameter. It enables support for the secondary IDE interface
1066 of the Holtek card, and permits faster I/O speeds to be set as well.
1c10e938 1067 See the <file:Documentation/ide/ide.txt> and
1da177e4
LT
1068 <file:drivers/ide/legacy/ht6560b.c> files for more info.
1069
1070config BLK_DEV_QD65XX
1071 tristate "QDI QD65xx support"
1072 help
84913882 1073 This driver is enabled at runtime using the "qd65xx.probe" kernel
1da177e4 1074 boot parameter. It permits faster I/O speeds to be set. See the
1c10e938 1075 <file:Documentation/ide/ide.txt> and <file:drivers/ide/legacy/qd65xx.c>
e665d505 1076 for more info.
1da177e4
LT
1077
1078config BLK_DEV_UMC8672
1079 tristate "UMC-8672 support"
1080 help
84913882 1081 This driver is enabled at runtime using the "umc8672.probe" kernel
1da177e4
LT
1082 boot parameter. It enables support for the secondary IDE interface
1083 of the UMC-8672, and permits faster I/O speeds to be set as well.
1c10e938 1084 See the files <file:Documentation/ide/ide.txt> and
1da177e4
LT
1085 <file:drivers/ide/legacy/umc8672.c> for more info.
1086
1087endif
1088
1089config BLK_DEV_IDEDMA
8e882ba1
SS
1090 def_bool BLK_DEV_IDEDMA_SFF || BLK_DEV_IDEDMA_PMAC || \
1091 BLK_DEV_IDEDMA_ICS || BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
1da177e4 1092
1da177e4
LT
1093endif
1094
1095config BLK_DEV_HD_ONLY
1096 bool "Old hard disk (MFM/RLL/IDE) driver"
1da177e4
LT
1097 help
1098 There are two drivers for MFM/RLL/IDE hard disks. Most people use
1099 the newer enhanced driver, but this old one is still around for two
1100 reasons. Some older systems have strange timing problems and seem to
1101 work only with the old driver (which itself does not work with some
1102 newer systems). The other reason is that the old driver is smaller,
1103 since it lacks the enhanced functionality of the new one. This makes
1104 it a good choice for systems with very tight memory restrictions, or
1105 for systems with only older MFM/RLL/ESDI drives. Choosing the old
1106 driver can save 13 KB or so of kernel memory.
1107
80aa31cb
BZ
1108 If you want to use this driver together with the new one you have
1109 to use "hda=noprobe hdb=noprobe" kernel parameters to prevent the new
1110 driver from probing the primary interface.
1111
1da177e4
LT
1112 If you are unsure, then just choose the Enhanced IDE/MFM/RLL driver
1113 instead of this one. For more detailed information, read the
1114 Disk-HOWTO, available from
1115 <http://www.tldp.org/docs.html#howto>.
1116
1117config BLK_DEV_HD
80aa31cb 1118 def_bool BLK_DEV_HD_ONLY
1da177e4 1119
e0ff9cd1 1120endif # IDE
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