drivers/ide/Kconfig

   1 #
   2 # IDE ATA ATAPI Block device driver configuration
   3 #
   4 # Andre Hedrick <andre@linux-ide.org>
   5 #
   6
   7 menuconfig IDE
   8         tristate "ATA/ATAPI/MFM/RLL support"
   9         depends on BLOCK
  10         depends on HAS_IOMEM
  11         ---help---
  12           If you say Y here, your kernel will be able to manage low cost mass
  13           storage units such as ATA/(E)IDE and ATAPI units. The most common
  14           cases are IDE hard drives and ATAPI CD-ROM drives.
  15
  16           If your system is pure SCSI and doesn't use these interfaces, you
  17           can say N here.
  18
  19           Integrated Disk Electronics (IDE aka ATA-1) is a connecting standard
  20           for mass storage units such as hard disks. It was designed by
  21           Western Digital and Compaq Computer in 1984. It was then named
  22           ST506. Quite a number of disks use the IDE interface.
  23
  24           AT Attachment (ATA) is the superset of the IDE specifications.
  25           ST506 was also called ATA-1.
  26
  27           Fast-IDE is ATA-2 (also named Fast ATA), Enhanced IDE (EIDE) is
  28           ATA-3. It provides support for larger disks (up to 8.4GB by means of
  29           the LBA standard), more disks (4 instead of 2) and for other mass
  30           storage units such as tapes and cdrom. UDMA/33 (aka UltraDMA/33) is
  31           ATA-4 and provides faster (and more CPU friendly) transfer modes
  32           than previous PIO (Programmed processor Input/Output) from previous
  33           ATA/IDE standards by means of fast DMA controllers.
  34
  35           ATA Packet Interface (ATAPI) is a protocol used by EIDE tape and
  36           CD-ROM drives, similar in many respects to the SCSI protocol.
  37
  38           SMART IDE (Self Monitoring, Analysis and Reporting Technology) was
  39           designed in order to prevent data corruption and disk crash by
  40           detecting pre hardware failure conditions (heat, access time, and
  41           the like...). Disks built since June 1995 may follow this standard.
  42           The kernel itself doesn't manage this; however there are quite a
  43           number of user programs such as smart that can query the status of
  44           SMART parameters from disk drives.
  45
  46           To compile this driver as a module, choose M here: the
  47           module will be called ide.
  48
  49           For further information, please read <file:Documentation/ide.txt>.
  50
  51           If unsure, say Y.
  52
  53 if IDE
  54
  55 config IDE_MAX_HWIFS
  56         int "Max IDE interfaces"
  57         depends on ALPHA || SUPERH || IA64 || EMBEDDED
  58         range 1 10
  59         default 4
  60         help
  61           This is the maximum number of IDE hardware interfaces that will
  62           be supported by the driver. Make sure it is at least as high as
  63           the number of IDE interfaces in your system.
  64
  65 config BLK_DEV_IDE
  66         tristate "Enhanced IDE/MFM/RLL disk/cdrom/tape/floppy support"
  67         ---help---
  68           If you say Y here, you will use the full-featured IDE driver to
  69           control up to ten ATA/IDE interfaces, each being able to serve a
  70           "master" and a "slave" device, for a total of up to twenty ATA/IDE
  71           disk/cdrom/tape/floppy drives.
  72
  73           Useful information about large (>540 MB) IDE disks, multiple
  74           interfaces, what to do if ATA/IDE devices are not automatically
  75           detected, sound card ATA/IDE ports, module support, and other
  76           topics, is contained in <file:Documentation/ide.txt>. For detailed
  77           information about hard drives, consult the Disk-HOWTO and the
  78           Multi-Disk-HOWTO, available from
  79           <http://www.tldp.org/docs.html#howto>.
  80
  81           To fine-tune ATA/IDE drive/interface parameters for improved
  82           performance, look for the hdparm package at
  83           <ftp://ibiblio.org/pub/Linux/system/hardware/>.
  84
  85           To compile this driver as a module, choose M here and read
  86           <file:Documentation/ide.txt>. The module will be called ide-mod.
  87           Do not compile this driver as a module if your root file system (the
  88           one containing the directory /) is located on an IDE device.
  89
  90           If you have one or more IDE drives, say Y or M here. If your system
  91           has no IDE drives, or if memory requirements are really tight, you
  92           could say N here, and select the "Old hard disk driver" below
  93           instead to save about 13 KB of memory in the kernel.
  94
  95 if BLK_DEV_IDE
  96
  97 comment "Please see Documentation/ide.txt for help/info on IDE drives"
  98
  99 config BLK_DEV_IDE_SATA
 100         bool "Support for SATA (deprecated; conflicts with libata SATA driver)"
 101         default n
 102         ---help---
 103           There are two drivers for Serial ATA controllers.
 104
 105           The main driver, "libata", uses the SCSI subsystem
 106           and supports most modern SATA controllers. In order to use it
 107           you may take a look at "Serial ATA (prod) and Parallel ATA
 108           (experimental) drivers".
 109
 110           The IDE driver (which you are currently configuring) supports
 111           a few first-generation SATA controllers.
 112
 113           In order to eliminate conflicts between the two subsystems,
 114           this config option enables the IDE driver's SATA support.
 115           Normally this is disabled, as it is preferred that libata
 116           supports SATA controllers, and this (IDE) driver supports
 117           PATA controllers.
 118
 119           If unsure, say N.
 120
 121 config BLK_DEV_HD_IDE
 122         bool "Use old disk-only driver on primary interface"
 123         depends on (X86 || SH_MPC1211)
 124         ---help---
 125           There are two drivers for MFM/RLL/IDE disks.  Most people use just
 126           the new enhanced driver by itself.  This option however installs the
 127           old hard disk driver to control the primary IDE/disk interface in
 128           the system, leaving the new enhanced IDE driver to take care of only
 129           the 2nd/3rd/4th IDE interfaces.  Doing this will prevent you from
 130           having an IDE/ATAPI CD-ROM or tape drive connected to the primary
 131           IDE interface.  Choosing this option may be useful for older systems
 132           which have MFM/RLL/ESDI controller+drives at the primary port
 133           address (0x1f0), along with IDE drives at the secondary/3rd/4th port
 134           addresses.
 135
 136           Normally, just say N here; you will then use the new driver for all
 137           4 interfaces.
 138
 139 config BLK_DEV_IDEDISK
 140         tristate "Include IDE/ATA-2 DISK support"
 141         ---help---
 142           This will include enhanced support for MFM/RLL/IDE hard disks.  If
 143           you have a MFM/RLL/IDE disk, and there is no special reason to use
 144           the old hard disk driver instead, say Y.  If you have an SCSI-only
 145           system, you can say N here.
 146
 147           To compile this driver as a module, choose M here: the
 148           module will be called ide-disk.
 149           Do not compile this driver as a module if your root file system
 150           (the one containing the directory /) is located on the IDE disk.
 151
 152           If unsure, say Y.
 153
 154 config IDEDISK_MULTI_MODE
 155         bool "Use multiple sector mode for Programmed Input/Output by default"
 156         help
 157           This setting is irrelevant for most IDE disks, with direct memory
 158           access, to which multiple sector mode does not apply. Multiple sector
 159           mode is a feature of most modern IDE hard drives, permitting the
 160           transfer of multiple sectors per Programmed Input/Output interrupt,
 161           rather than the usual one sector per interrupt. When this feature is
 162           enabled, it can reduce operating system overhead for disk Programmed
 163           Input/Output. On some systems, it also can increase the data
 164           throughput of Programmed Input/Output. Some drives, however, seemed
 165           to run slower with multiple sector mode enabled. Some drives claimed
 166           to support multiple sector mode, but lost data at some settings.
 167           Under rare circumstances, such failures could result in massive
 168           filesystem corruption.
 169
 170           If you get the following error, try to say Y here:
 171
 172           hda: set_multmode: status=0x51 { DriveReady SeekComplete Error }
 173           hda: set_multmode: error=0x04 { DriveStatusError }
 174
 175           If in doubt, say N.
 176
 177 config BLK_DEV_IDECS
 178         tristate "PCMCIA IDE support"
 179         depends on PCMCIA
 180         help
 181           Support for Compact Flash cards, outboard IDE disks, tape drives,
 182           and CD-ROM drives connected through a PCMCIA card.
 183
 184 config BLK_DEV_DELKIN
 185         tristate "Cardbus IDE support (Delkin/ASKA/Workbit)"
 186         depends on CARDBUS && PCI
 187         help
 188           Support for Delkin, ASKA, and Workbit Cardbus CompactFlash
 189           Adapters.  This may also work for similar SD and XD adapters.
 190
 191 config BLK_DEV_IDECD
 192         tristate "Include IDE/ATAPI CDROM support"
 193         ---help---
 194           If you have a CD-ROM drive using the ATAPI protocol, say Y. ATAPI is
 195           a newer protocol used by IDE CD-ROM and TAPE drives, similar to the
 196           SCSI protocol. Most new CD-ROM drives use ATAPI, including the
 197           NEC-260, Mitsumi FX400, Sony 55E, and just about all non-SCSI
 198           double(2X) or better speed drives.
 199
 200           If you say Y here, the CD-ROM drive will be identified at boot time
 201           along with other IDE devices, as "hdb" or "hdc", or something
 202           similar (check the boot messages with dmesg). If this is your only
 203           CD-ROM drive, you can say N to all other CD-ROM options, but be sure
 204           to say Y or M to "ISO 9660 CD-ROM file system support".
 205
 206           To compile this driver as a module, choose M here: the
 207           module will be called ide-cd.
 208
 209 config BLK_DEV_IDETAPE
 210         tristate "Include IDE/ATAPI TAPE support (EXPERIMENTAL)"
 211         depends on EXPERIMENTAL
 212         help
 213           If you have an IDE tape drive using the ATAPI protocol, say Y.
 214           ATAPI is a newer protocol used by IDE tape and CD-ROM drives,
 215           similar to the SCSI protocol.  If you have an SCSI tape drive
 216           however, you can say N here.
 217
 218           You should also say Y if you have an OnStream DI-30 tape drive; this
 219           will not work with the SCSI protocol, until there is support for the
 220           SC-30 and SC-50 versions.
 221
 222           If you say Y here, the tape drive will be identified at boot time
 223           along with other IDE devices, as "hdb" or "hdc", or something
 224           similar, and will be mapped to a character device such as "ht0"
 225           (check the boot messages with dmesg).  Be sure to consult the
 226           <file:drivers/ide/ide-tape.c> and <file:Documentation/ide.txt> files
 227           for usage information.
 228
 229           To compile this driver as a module, choose M here: the
 230           module will be called ide-tape.
 231
 232 config BLK_DEV_IDEFLOPPY
 233         tristate "Include IDE/ATAPI FLOPPY support"
 234         ---help---
 235           If you have an IDE floppy drive which uses the ATAPI protocol,
 236           answer Y.  ATAPI is a newer protocol used by IDE CD-ROM/tape/floppy
 237           drives, similar to the SCSI protocol.
 238
 239           The LS-120 and the IDE/ATAPI Iomega ZIP drive are also supported by
 240           this driver. For information about jumper settings and the question
 241           of when a ZIP drive uses a partition table, see
 242           <http://www.win.tue.nl/~aeb/linux/zip/zip-1.html>.
 243           (ATAPI PD-CD/CDR drives are not supported by this driver; support
 244           for PD-CD/CDR drives is available if you answer Y to
 245           "SCSI emulation support", below).
 246
 247           If you say Y here, the FLOPPY drive will be identified along with
 248           other IDE devices, as "hdb" or "hdc", or something similar (check
 249           the boot messages with dmesg).
 250
 251           To compile this driver as a module, choose M here: the
 252           module will be called ide-floppy.
 253
 254 config BLK_DEV_IDESCSI
 255         tristate "SCSI emulation support"
 256         depends on SCSI
 257         ---help---
 258           WARNING: ide-scsi is no longer needed for cd writing applications!
 259           The 2.6 kernel supports direct writing to ide-cd, which eliminates
 260           the need for ide-scsi + the entire scsi stack just for writing a
 261           cd. The new method is more efficient in every way.
 262
 263           This will provide SCSI host adapter emulation for IDE ATAPI devices,
 264           and will allow you to use a SCSI device driver instead of a native
 265           ATAPI driver.
 266
 267           This is useful if you have an ATAPI device for which no native
 268           driver has been written (for example, an ATAPI PD-CD drive);
 269           you can then use this emulation together with an appropriate SCSI
 270           device driver. In order to do this, say Y here and to "SCSI support"
 271           and "SCSI generic support", below. You must then provide the kernel
 272           command line "hdx=ide-scsi" (try "man bootparam" or see the
 273           documentation of your boot loader (lilo or loadlin) about how to
 274           pass options to the kernel at boot time) for devices if you want the
 275           native EIDE sub-drivers to skip over the native support, so that
 276           this SCSI emulation can be used instead.
 277
 278           Note that this option does NOT allow you to attach SCSI devices to a
 279           box that doesn't have a SCSI host adapter installed.
 280
 281           If both this SCSI emulation and native ATAPI support are compiled
 282           into the kernel, the native support will be used.
 283
 284 config BLK_DEV_IDEACPI
 285         bool "IDE ACPI support"
 286         depends on ACPI
 287         ---help---
 288           Implement ACPI support for generic IDE devices. On modern
 289           machines ACPI support is required to properly handle ACPI S3 states.
 290
 291 config IDE_TASK_IOCTL
 292         bool "IDE Taskfile Access"
 293         help
 294           This is a direct raw access to the media.  It is a complex but
 295           elegant solution to test and validate the domain of the hardware and
 296           perform below the driver data recovery if needed.  This is the most
 297           basic form of media-forensics.
 298
 299           If you are unsure, say N here.
 300
 301 config IDE_PROC_FS
 302         bool "legacy /proc/ide/ support"
 303         depends on IDE && PROC_FS
 304         default y
 305         help
 306           This option enables support for the various files in
 307           /proc/ide.  In Linux 2.6 this has been superseded by
 308           files in sysfs but many legacy applications rely on this.
 309
 310           If unsure say Y.
 311
 312 comment "IDE chipset support/bugfixes"
 313
 314 config IDE_GENERIC
 315         tristate "generic/default IDE chipset support"
 316         help
 317           If unsure, say N.
 318
 319 config BLK_DEV_PLATFORM
 320         tristate "Platform driver for IDE interfaces"
 321         help
 322           This is the platform IDE driver, used mostly for Memory Mapped
 323           IDE devices, like Compact Flashes running in True IDE mode.
 324
 325           If unsure, say N.
 326
 327 config BLK_DEV_CMD640
 328         bool "CMD640 chipset bugfix/support"
 329         depends on X86
 330         ---help---
 331           The CMD-Technologies CMD640 IDE chip is used on many common 486 and
 332           Pentium motherboards, usually in combination with a "Neptune" or
 333           "SiS" chipset. Unfortunately, it has a number of rather nasty
 334           design flaws that can cause severe data corruption under many common
 335           conditions. Say Y here to include code which tries to automatically
 336           detect and correct the problems under Linux. This option also
 337           enables access to the secondary IDE ports in some CMD640 based
 338           systems.
 339
 340           This driver will work automatically in PCI based systems (most new
 341           systems have PCI slots). But if your system uses VESA local bus
 342           (VLB) instead of PCI, you must also supply a kernel boot parameter
 343           to enable the CMD640 bugfix/support: "ide0=cmd640_vlb". (Try "man
 344           bootparam" or see the documentation of your boot loader about how to
 345           pass options to the kernel.)
 346
 347           The CMD640 chip is also used on add-in cards by Acculogic, and on
 348           the "CSA-6400E PCI to IDE controller" that some people have. For
 349           details, read <file:Documentation/ide.txt>.
 350
 351 config BLK_DEV_CMD640_ENHANCED
 352         bool "CMD640 enhanced support"
 353         depends on BLK_DEV_CMD640
 354         help
 355           This option includes support for setting/autotuning PIO modes and
 356           prefetch on CMD640 IDE interfaces.  For details, read
 357           <file:Documentation/ide.txt>. If you have a CMD640 IDE interface
 358           and your BIOS does not already do this for you, then say Y here.
 359           Otherwise say N.
 360
 361 config BLK_DEV_IDEPNP
 362         bool "PNP EIDE support"
 363         depends on PNP
 364         select IDE_GENERIC
 365         help
 366           If you have a PnP (Plug and Play) compatible EIDE card and
 367           would like the kernel to automatically detect and activate
 368           it, say Y here.
 369
 370 if PCI
 371
 372 comment "PCI IDE chipsets support"
 373
 374 config BLK_DEV_IDEPCI
 375         bool
 376
 377 config IDEPCI_SHARE_IRQ
 378         bool "Sharing PCI IDE interrupts support"
 379         depends on BLK_DEV_IDEPCI
 380         help
 381           Some ATA/IDE chipsets have hardware support which allows for
 382           sharing a single IRQ with other cards. To enable support for
 383           this in the ATA/IDE driver, say Y here.
 384
 385           It is safe to say Y to this question, in most cases.
 386           If unsure, say N.
 387
 388 config IDEPCI_PCIBUS_ORDER
 389         def_bool BLK_DEV_IDE=y && BLK_DEV_IDEPCI
 390
 391 # TODO: split it on per host driver config options (or module parameters)
 392 config BLK_DEV_OFFBOARD
 393         bool "Boot off-board chipsets first support"
 394         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)
 395         help
 396           Normally, IDE controllers built into the motherboard (on-board
 397           controllers) are assigned to ide0 and ide1 while those on add-in PCI
 398           cards (off-board controllers) are relegated to ide2 and ide3.
 399           Answering Y here will allow you to reverse the situation, with
 400           off-board controllers on ide0/1 and on-board controllers on ide2/3.
 401           This can improve the usability of some boot managers such as lilo
 402           when booting from a drive on an off-board controller.
 403
 404           If you say Y here, and you actually want to reverse the device scan
 405           order as explained above, you also need to issue the kernel command
 406           line option "ide=reverse". (Try "man bootparam" or see the
 407           documentation of your boot loader (lilo or loadlin) about how to
 408           pass options to the kernel at boot time.)
 409
 410           Note that, if you do this, the order of the hd* devices will be
 411           rearranged which may require modification of fstab and other files.
 412
 413           If in doubt, say N.
 414
 415 config BLK_DEV_GENERIC
 416         tristate "Generic PCI IDE Chipset Support"
 417         select BLK_DEV_IDEPCI
 418         help
 419           This option provides generic support for various PCI IDE Chipsets
 420           which otherwise might not be supported.
 421
 422 config BLK_DEV_OPTI621
 423         tristate "OPTi 82C621 chipset enhanced support (EXPERIMENTAL)"
 424         depends on EXPERIMENTAL
 425         select BLK_DEV_IDEPCI
 426         help
 427           This is a driver for the OPTi 82C621 EIDE controller.
 428           Please read the comments at the top of <file:drivers/ide/pci/opti621.c>.
 429
 430 config BLK_DEV_RZ1000
 431         tristate "RZ1000 chipset bugfix/support"
 432         depends on X86
 433         select BLK_DEV_IDEPCI
 434         help
 435           The PC-Technologies RZ1000 IDE chip is used on many common 486 and
 436           Pentium motherboards, usually along with the "Neptune" chipset.
 437           Unfortunately, it has a rather nasty design flaw that can cause
 438           severe data corruption under many conditions. Say Y here to include
 439           code which automatically detects and corrects the problem under
 440           Linux. This may slow disk throughput by a few percent, but at least
 441           things will operate 100% reliably.
 442
 443 config BLK_DEV_IDEDMA_PCI
 444         bool
 445         select BLK_DEV_IDEPCI
 446
 447 config BLK_DEV_AEC62XX
 448         tristate "AEC62XX chipset support"
 449         select BLK_DEV_IDEDMA_PCI
 450         help
 451           This driver adds explicit support for Acard AEC62xx (Artop ATP8xx)
 452           IDE controllers. This allows the kernel to change PIO, DMA and UDMA
 453           speeds and to configure the chip to optimum performance.
 454
 455 config BLK_DEV_ALI15X3
 456         tristate "ALI M15x3 chipset support"
 457         select BLK_DEV_IDEDMA_PCI
 458         help
 459           This driver ensures (U)DMA support for ALI 1533, 1543 and 1543C
 460           onboard chipsets.  It also tests for Simplex mode and enables
 461           normal dual channel support.
 462
 463           If you say Y here, you also need to say Y to "Use DMA by default
 464           when available", above.  Please read the comments at the top of
 465           <file:drivers/ide/pci/alim15x3.c>.
 466
 467           If unsure, say N.
 468
 469 config WDC_ALI15X3
 470         bool "ALI M15x3 WDC support (DANGEROUS)"
 471         depends on BLK_DEV_ALI15X3
 472         ---help---
 473           This allows for UltraDMA support for WDC drives that ignore CRC
 474           checking. You are a fool for enabling this option, but there have
 475           been requests. DO NOT COMPLAIN IF YOUR DRIVE HAS FS CORRUPTION, IF
 476           YOU ENABLE THIS! No one will listen, just laugh for ignoring this
 477           SERIOUS WARNING.
 478
 479           Using this option can allow WDC drives to run at ATA-4/5 transfer
 480           rates with only an ATA-2 support structure.
 481
 482           SAY N!
 483
 484 config BLK_DEV_AMD74XX
 485         tristate "AMD and nVidia IDE support"
 486         depends on !ARM
 487         select BLK_DEV_IDEDMA_PCI
 488         help
 489           This driver adds explicit support for AMD-7xx and AMD-8111 chips
 490           and also for the nVidia nForce chip.  This allows the kernel to
 491           change PIO, DMA and UDMA speeds and to configure the chip to
 492           optimum performance.
 493
 494 config BLK_DEV_ATIIXP
 495         tristate "ATI IXP chipset IDE support"
 496         depends on X86
 497         select BLK_DEV_IDEDMA_PCI
 498         help
 499           This driver adds explicit support for ATI IXP chipset.
 500           This allows the kernel to change PIO, DMA and UDMA speeds
 501           and to configure the chip to optimum performance.
 502
 503           Say Y here if you have an ATI IXP chipset IDE controller.
 504
 505 config BLK_DEV_CMD64X
 506         tristate "CMD64{3|6|8|9} chipset support"
 507         select BLK_DEV_IDEDMA_PCI
 508         help
 509           Say Y here if you have an IDE controller which uses any of these
 510           chipsets: CMD643, CMD646, or CMD648.
 511
 512 config BLK_DEV_TRIFLEX
 513         tristate "Compaq Triflex IDE support"
 514         select BLK_DEV_IDEDMA_PCI
 515         help
 516           Say Y here if you have a Compaq Triflex IDE controller, such
 517           as those commonly found on Compaq Pentium-Pro systems
 518
 519 config BLK_DEV_CY82C693
 520         tristate "CY82C693 chipset support"
 521         select BLK_DEV_IDEDMA_PCI
 522         help
 523           This driver adds detection and support for the CY82C693 chipset
 524           used on Digital's PC-Alpha 164SX boards.
 525
 526           If you say Y here, you need to say Y to "Use DMA by default
 527           when available" as well.
 528
 529 config BLK_DEV_CS5520
 530         tristate "Cyrix CS5510/20 MediaGX chipset support (VERY EXPERIMENTAL)"
 531         depends on EXPERIMENTAL
 532         select BLK_DEV_IDEDMA_PCI
 533         help
 534           Include support for PIO tuning and virtual DMA on the Cyrix MediaGX
 535           5510/5520 chipset. This will automatically be detected and
 536           configured if found.
 537
 538           It is safe to say Y to this question.
 539
 540 config BLK_DEV_CS5530
 541         tristate "Cyrix/National Semiconductor CS5530 MediaGX chipset support"
 542         select BLK_DEV_IDEDMA_PCI
 543         help
 544           Include support for UDMA on the Cyrix MediaGX 5530 chipset. This
 545           will automatically be detected and configured if found.
 546
 547           It is safe to say Y to this question.
 548
 549 config BLK_DEV_CS5535
 550         tristate "AMD CS5535 chipset support"
 551         depends on X86 && !X86_64
 552         select BLK_DEV_IDEDMA_PCI
 553         help
 554           Include support for UDMA on the NSC/AMD CS5535 companion chipset.
 555           This will automatically be detected and configured if found.
 556
 557           It is safe to say Y to this question.
 558
 559 config BLK_DEV_HPT34X
 560         tristate "HPT34X chipset support"
 561         select BLK_DEV_IDEDMA_PCI
 562         help
 563           This driver adds up to 4 more EIDE devices sharing a single
 564           interrupt. The HPT343 chipset in its current form is a non-bootable
 565           controller; the HPT345/HPT363 chipset is a bootable (needs BIOS FIX)
 566           PCI UDMA controllers. This driver requires dynamic tuning of the
 567           chipset during the ide-probe at boot time. It is reported to support
 568           DVD II drives, by the manufacturer.
 569
 570 config HPT34X_AUTODMA
 571         bool "HPT34X AUTODMA support (EXPERIMENTAL)"
 572         depends on BLK_DEV_HPT34X && EXPERIMENTAL
 573         help
 574           This is a dangerous thing to attempt currently! Please read the
 575           comments at the top of <file:drivers/ide/pci/hpt34x.c>.  If you say Y
 576           here, then say Y to "Use DMA by default when available" as well.
 577
 578           If unsure, say N.
 579
 580 config BLK_DEV_HPT366
 581         tristate "HPT36X/37X chipset support"
 582         select BLK_DEV_IDEDMA_PCI
 583         help
 584           HPT366 is an Ultra DMA chipset for ATA-66.
 585           HPT368 is an Ultra DMA chipset for ATA-66 RAID Based.
 586           HPT370 is an Ultra DMA chipset for ATA-100.
 587           HPT372 is an Ultra DMA chipset for ATA-100.
 588           HPT374 is an Ultra DMA chipset for ATA-100.
 589
 590           This driver adds up to 4 more EIDE devices sharing a single
 591           interrupt.
 592
 593           The HPT366 chipset in its current form is bootable. One solution
 594           for this problem are special LILO commands for redirecting the
 595           reference to device 0x80. The other solution is to say Y to "Boot
 596           off-board chipsets first support" (CONFIG_BLK_DEV_OFFBOARD) unless
 597           your mother board has the chipset natively mounted. Regardless one
 598           should use the fore mentioned option and call at LILO or include
 599           "ide=reverse" in LILO's append-line.
 600
 601           This driver requires dynamic tuning of the chipset during the
 602           ide-probe at boot. It is reported to support DVD II drives, by the
 603           manufacturer.
 604
 605 config BLK_DEV_JMICRON
 606         tristate "JMicron JMB36x support"
 607         select BLK_DEV_IDEDMA_PCI
 608         help
 609           Basic support for the JMicron ATA controllers. For full support
 610           use the libata drivers.
 611
 612 config BLK_DEV_SC1200
 613         tristate "National SCx200 chipset support"
 614         select BLK_DEV_IDEDMA_PCI
 615         help
 616           This driver adds support for the built in IDE on the National
 617           SCx200 series of embedded x86 "Geode" systems
 618
 619 config BLK_DEV_PIIX
 620         tristate "Intel PIIXn chipsets support"
 621         select BLK_DEV_IDEDMA_PCI
 622         help
 623           This driver adds explicit support for Intel PIIX and ICH chips
 624           and also for the Efar Victory66 (slc90e66) chip.  This allows
 625           the kernel to change PIO, DMA and UDMA speeds and to configure
 626           the chip to optimum performance.
 627
 628 config BLK_DEV_IT8213
 629         tristate "IT8213 IDE support"
 630         select BLK_DEV_IDEDMA_PCI
 631         help
 632          This driver adds support for the ITE 8213 IDE controller.
 633
 634 config BLK_DEV_IT821X
 635         tristate "IT821X IDE support"
 636         select BLK_DEV_IDEDMA_PCI
 637         help
 638           This driver adds support for the ITE 8211 IDE controller and the
 639           IT 8212 IDE RAID controller in both RAID and pass-through mode.
 640
 641 config BLK_DEV_NS87415
 642         tristate "NS87415 chipset support"
 643         select BLK_DEV_IDEDMA_PCI
 644         help
 645           This driver adds detection and support for the NS87415 chip
 646           (used mainly on SPARC64 and PA-RISC machines).
 647
 648           Please read the comments at the top of <file:drivers/ide/pci/ns87415.c>.
 649
 650 config BLK_DEV_PDC202XX_OLD
 651         tristate "PROMISE PDC202{46|62|65|67} support"
 652         select BLK_DEV_IDEDMA_PCI
 653         help
 654           Promise Ultra33 or PDC20246
 655           Promise Ultra66 or PDC20262
 656           Promise Ultra100 or PDC20265/PDC20267/PDC20268
 657
 658           This driver adds up to 4 more EIDE devices sharing a single
 659           interrupt. This add-on card is a bootable PCI UDMA controller. Since
 660           multiple cards can be installed and there are BIOS ROM problems that
 661           happen if the BIOS revisions of all installed cards (three-max) do
 662           not match, the driver attempts to do dynamic tuning of the chipset
 663           at boot-time for max-speed.  Ultra33 BIOS 1.25 or newer is required
 664           for more than one card. This card may require that you say Y to
 665           "Special UDMA Feature".
 666
 667           If you say Y here, you need to say Y to "Use DMA by default when
 668           available" as well.
 669
 670           Please read the comments at the top of
 671           <file:drivers/ide/pci/pdc202xx_old.c>.
 672
 673           If unsure, say N.
 674
 675 config PDC202XX_BURST
 676         bool "Special UDMA Feature"
 677         depends on BLK_DEV_PDC202XX_OLD
 678         help
 679           This option causes the pdc202xx driver to enable UDMA modes on the
 680           PDC202xx even when the PDC202xx BIOS has not done so.
 681
 682           It was originally designed for the PDC20246/Ultra33, whose BIOS will
 683           only setup UDMA on the first two PDC20246 cards.  It has also been
 684           used successfully on a PDC20265/Ultra100, allowing use of UDMA modes
 685           when the PDC20265 BIOS has been disabled (for faster boot up).
 686
 687           Please read the comments at the top of
 688           <file:drivers/ide/pci/pdc202xx_old.c>.
 689
 690           If unsure, say N.
 691
 692 config BLK_DEV_PDC202XX_NEW
 693         tristate "PROMISE PDC202{68|69|70|71|75|76|77} support"
 694         select BLK_DEV_IDEDMA_PCI
 695
 696 config BLK_DEV_SVWKS
 697         tristate "ServerWorks OSB4/CSB5/CSB6 chipsets support"
 698         select BLK_DEV_IDEDMA_PCI
 699         help
 700           This driver adds PIO/(U)DMA support for the ServerWorks OSB4/CSB5
 701           chipsets.
 702
 703 config BLK_DEV_SGIIOC4
 704         tristate "Silicon Graphics IOC4 chipset ATA/ATAPI support"
 705         depends on (IA64_SGI_SN2 || IA64_GENERIC) && SGI_IOC4
 706         select IDEPCI_SHARE_IRQ
 707         select BLK_DEV_IDEDMA_PCI
 708         help
 709           This driver adds PIO & MultiMode DMA-2 support for the SGI IOC4
 710           chipset, which has one channel and can support two devices.
 711           Please say Y here if you have an Altix System from SGI.
 712
 713 config BLK_DEV_SIIMAGE
 714         tristate "Silicon Image chipset support"
 715         select BLK_DEV_IDEDMA_PCI
 716         help
 717           This driver adds PIO/(U)DMA support for the SI CMD680 and SII
 718           3112 (Serial ATA) chips.
 719
 720 config BLK_DEV_SIS5513
 721         tristate "SiS5513 chipset support"
 722         depends on X86
 723         select BLK_DEV_IDEDMA_PCI
 724         help
 725           This driver ensures (U)DMA support for SIS5513 chipset family based
 726           mainboards.
 727
 728           The following chipsets are supported:
 729           ATA16:  SiS5511, SiS5513
 730           ATA33:  SiS5591, SiS5597, SiS5598, SiS5600
 731           ATA66:  SiS530, SiS540, SiS620, SiS630, SiS640
 732           ATA100: SiS635, SiS645, SiS650, SiS730, SiS735, SiS740,
 733           SiS745, SiS750
 734
 735           If you say Y here, you need to say Y to "Use DMA by default when
 736           available" as well.
 737
 738           Please read the comments at the top of <file:drivers/ide/pci/sis5513.c>.
 739
 740 config BLK_DEV_SL82C105
 741         tristate "Winbond SL82c105 support"
 742         depends on (PPC || ARM)
 743         select BLK_DEV_IDEDMA_PCI
 744         help
 745           If you have a Winbond SL82c105 IDE controller, say Y here to enable
 746           special configuration for this chip. This is common on various CHRP
 747           motherboards, but could be used elsewhere. If in doubt, say Y.
 748
 749 config BLK_DEV_SLC90E66
 750         tristate "SLC90E66 chipset support"
 751         select BLK_DEV_IDEDMA_PCI
 752         help
 753           This driver ensures (U)DMA support for Victory66 SouthBridges for
 754           SMsC with Intel NorthBridges.  This is an Ultra66 based chipset.
 755           The nice thing about it is that you can mix Ultra/DMA/PIO devices
 756           and it will handle timing cycles.  Since this is an improved
 757           look-a-like to the PIIX4 it should be a nice addition.
 758
 759           If you say Y here, you need to say Y to "Use DMA by default when
 760           available" as well.
 761
 762           Please read the comments at the top of
 763           <file:drivers/ide/pci/slc90e66.c>.
 764
 765 config BLK_DEV_TRM290
 766         tristate "Tekram TRM290 chipset support"
 767         select BLK_DEV_IDEDMA_PCI
 768         help
 769           This driver adds support for bus master DMA transfers
 770           using the Tekram TRM290 PCI IDE chip. Volunteers are
 771           needed for further tweaking and development.
 772           Please read the comments at the top of <file:drivers/ide/pci/trm290.c>.
 773
 774 config BLK_DEV_VIA82CXXX
 775         tristate "VIA82CXXX chipset support"
 776         select BLK_DEV_IDEDMA_PCI
 777         help
 778           This driver adds explicit support for VIA BusMastering IDE chips.
 779           This allows the kernel to change PIO, DMA and UDMA speeds and to
 780           configure the chip to optimum performance.
 781
 782 config BLK_DEV_TC86C001
 783         tristate "Toshiba TC86C001 support"
 784         select BLK_DEV_IDEDMA_PCI
 785         help
 786         This driver adds support for Toshiba TC86C001 GOKU-S chip.
 787
 788 config BLK_DEV_CELLEB
 789         tristate "Toshiba's Cell Reference Set IDE support"
 790         depends on PPC_CELLEB
 791         select BLK_DEV_IDEDMA_PCI
 792         help
 793           This driver provides support for the built-in IDE controller on
 794           Toshiba Cell Reference Board.
 795           If unsure, say Y.
 796
 797 endif
 798
 799 config BLK_DEV_IDE_PMAC
 800         bool "Builtin PowerMac IDE support"
 801         depends on PPC_PMAC && IDE=y && BLK_DEV_IDE=y
 802         help
 803           This driver provides support for the built-in IDE controller on
 804           most of the recent Apple Power Macintoshes and PowerBooks.
 805           If unsure, say Y.
 806
 807 config BLK_DEV_IDE_PMAC_ATA100FIRST
 808         bool "Probe internal ATA/100 (Kauai) first"
 809         depends on BLK_DEV_IDE_PMAC
 810         help
 811           This option will cause the ATA/100 controller found in UniNorth2
 812           based machines (Windtunnel PowerMac, Aluminium PowerBooks, ...)
 813           to be probed before the ATA/66 and ATA/33 controllers. Without
 814           these, those machine used to have the hard disk on hdc and the
 815           CD-ROM on hda. This option changes this to more natural hda for
 816           hard disk and hdc for CD-ROM.
 817
 818 config BLK_DEV_IDEDMA_PMAC
 819         bool "PowerMac IDE DMA support"
 820         depends on BLK_DEV_IDE_PMAC
 821         select BLK_DEV_IDEDMA_PCI
 822         help
 823           This option allows the driver for the built-in IDE controller on
 824           Power Macintoshes and PowerBooks to use DMA (direct memory access)
 825           to transfer data to and from memory.  Saying Y is safe and improves
 826           performance.
 827
 828 config BLK_DEV_IDE_SWARM
 829         tristate "IDE for Sibyte evaluation boards"
 830         depends on SIBYTE_SB1xxx_SOC
 831
 832 config BLK_DEV_IDE_AU1XXX
 833        bool "IDE for AMD Alchemy Au1200"
 834        depends on SOC_AU1200
 835 choice
 836        prompt "IDE Mode for AMD Alchemy Au1200"
 837        default CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
 838        depends on SOC_AU1200 && BLK_DEV_IDE_AU1XXX
 839
 840 config BLK_DEV_IDE_AU1XXX_PIO_DBDMA
 841        bool "PIO+DbDMA IDE for AMD Alchemy Au1200"
 842
 843 config BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 844        bool "MDMA2+DbDMA IDE for AMD Alchemy Au1200"
 845        depends on SOC_AU1200 && BLK_DEV_IDE_AU1XXX
 846 endchoice
 847
 848 config BLK_DEV_IDE_AU1XXX_SEQTS_PER_RQ
 849        int "Maximum transfer size (KB) per request (up to 128)"
 850        default "128"
 851        depends on BLK_DEV_IDE_AU1XXX
 852
 853 config IDE_ARM
 854         def_bool ARM && (ARCH_CLPS7500 || ARCH_RPC || ARCH_SHARK)
 855         select IDE_GENERIC
 856
 857 config BLK_DEV_IDE_ICSIDE
 858         tristate "ICS IDE interface support"
 859         depends on ARM && ARCH_ACORN
 860         help
 861           On Acorn systems, say Y here if you wish to use the ICS IDE
 862           interface card.  This is not required for ICS partition support.
 863           If you are unsure, say N to this.
 864
 865 config BLK_DEV_IDEDMA_ICS
 866         bool "ICS DMA support"
 867         depends on BLK_DEV_IDE_ICSIDE
 868         help
 869           Say Y here if you want to add DMA (Direct Memory Access) support to
 870           the ICS IDE driver.
 871
 872 config BLK_DEV_IDE_RAPIDE
 873         tristate "RapIDE interface support"
 874         depends on ARM && ARCH_ACORN
 875         help
 876           Say Y here if you want to support the Yellowstone RapIDE controller
 877           manufactured for use with Acorn computers.
 878
 879 config BLK_DEV_IDE_BAST
 880         tristate "Simtec BAST / Thorcom VR1000 IDE support"
 881         depends on ARM && (ARCH_BAST || MACH_VR1000)
 882         help
 883           Say Y here if you want to support the onboard IDE channels on the
 884           Simtec BAST or the Thorcom VR1000
 885
 886 config ETRAX_IDE
 887         bool "ETRAX IDE support"
 888         depends on CRIS && BROKEN
 889         select BLK_DEV_IDEDMA
 890         select IDE_GENERIC
 891         help
 892           Enables the ETRAX IDE driver.
 893
 894           You can't use parallel ports or SCSI ports at the same time.
 895
 896 config ETRAX_IDE_DELAY
 897         int "Delay for drives to regain consciousness"
 898         depends on ETRAX_IDE && ETRAX_ARCH_V10
 899         default 15
 900         help
 901           Number of seconds to wait for IDE drives to spin up after an IDE
 902           reset.
 903
 904 choice
 905         prompt "IDE reset pin"
 906         depends on ETRAX_IDE && ETRAX_ARCH_V10
 907         default ETRAX_IDE_PB7_RESET
 908
 909 config ETRAX_IDE_PB7_RESET
 910         bool "Port_PB_Bit_7"
 911         help
 912           IDE reset on pin 7 on port B
 913
 914 config ETRAX_IDE_G27_RESET
 915         bool "Port_G_Bit_27"
 916         help
 917           IDE reset on pin 27 on port G
 918
 919 endchoice
 920
 921 config IDE_H8300
 922         bool "H8300 IDE support"
 923         depends on H8300
 924         select IDE_GENERIC
 925         default y
 926         help
 927           Enables the H8300 IDE driver.
 928
 929 config BLK_DEV_GAYLE
 930         bool "Amiga Gayle IDE interface support"
 931         depends on AMIGA
 932         select IDE_GENERIC
 933         help
 934           This is the IDE driver for the Amiga Gayle IDE interface. It supports
 935           both the `A1200 style' and `A4000 style' of the Gayle IDE interface,
 936           This includes builtin IDE interfaces on some Amiga models (A600,
 937           A1200, A4000, and A4000T), and IDE interfaces on the Zorro expansion
 938           bus (M-Tech E-Matrix 530 expansion card).
 939           Say Y if you have an Amiga with a Gayle IDE interface and want to use
 940           IDE devices (hard disks, CD-ROM drives, etc.) that are connected to
 941           it.
 942           Note that you also have to enable Zorro bus support if you want to
 943           use Gayle IDE interfaces on the Zorro expansion bus.
 944
 945 config BLK_DEV_IDEDOUBLER
 946         bool "Amiga IDE Doubler support (EXPERIMENTAL)"
 947         depends on BLK_DEV_GAYLE && EXPERIMENTAL
 948         ---help---
 949           This driver provides support for the so-called `IDE doublers' (made
 950           by various manufacturers, e.g. Eyetech) that can be connected to the
 951           builtin IDE interface of some Amiga models. Using such an IDE
 952           doubler, you can connect up to four instead of two IDE devices on
 953           the Amiga's builtin IDE interface.
 954
 955           Note that the normal Amiga Gayle IDE driver may not work correctly
 956           if you have an IDE doubler and don't enable this driver!
 957
 958           Say Y if you have an IDE doubler.  The driver is enabled at kernel
 959           runtime using the "ide=doubler" kernel boot parameter.
 960
 961 config BLK_DEV_BUDDHA
 962         bool "Buddha/Catweasel/X-Surf IDE interface support (EXPERIMENTAL)"
 963         depends on ZORRO && EXPERIMENTAL
 964         select IDE_GENERIC
 965         help
 966           This is the IDE driver for the IDE interfaces on the Buddha,
 967           Catweasel and X-Surf expansion boards.  It supports up to two interfaces
 968           on the Buddha, three on the Catweasel and two on the X-Surf.
 969
 970           Say Y if you have a Buddha or Catweasel expansion board and want to
 971           use IDE devices (hard disks, CD-ROM drives, etc.) that are connected
 972           to one of its IDE interfaces.
 973
 974 config BLK_DEV_FALCON_IDE
 975         bool "Falcon IDE interface support"
 976         depends on ATARI
 977         select IDE_GENERIC
 978         help
 979           This is the IDE driver for the builtin IDE interface on the Atari
 980           Falcon. Say Y if you have a Falcon and want to use IDE devices (hard
 981           disks, CD-ROM drives, etc.) that are connected to the builtin IDE
 982           interface.
 983
 984 config BLK_DEV_MAC_IDE
 985         bool "Macintosh Quadra/Powerbook IDE interface support"
 986         depends on MAC
 987         select IDE_GENERIC
 988         help
 989           This is the IDE driver for the builtin IDE interface on some m68k
 990           Macintosh models. It supports both the `Quadra style' (used in
 991           Quadra/ Centris 630 and Performa 588 models) and `Powerbook style'
 992           (used in the Powerbook 150 and 190 models) IDE interface.
 993
 994           Say Y if you have such an Macintosh model and want to use IDE
 995           devices (hard disks, CD-ROM drives, etc.) that are connected to the
 996           builtin IDE interface.
 997
 998 config BLK_DEV_Q40IDE
 999         bool "Q40/Q60 IDE interface support"
1000         depends on Q40
1001         select IDE_GENERIC
1002         help
1003           Enable the on-board IDE controller in the Q40/Q60.  This should
1004           normally be on; disable it only if you are running a custom hard
1005           drive subsystem through an expansion card.
1006
1007 config BLK_DEV_MPC8xx_IDE
1008         bool "MPC8xx IDE support"
1009         depends on 8xx && (LWMON || IVMS8 || IVML24 || TQM8xxL) && IDE=y && BLK_DEV_IDE=y && !PPC_MERGE
1010         select IDE_GENERIC
1011         help
1012           This option provides support for IDE on Motorola MPC8xx Systems.
1013           Please see 'Type of MPC8xx IDE interface' for details.
1014
1015           If unsure, say N.
1016
1017 choice
1018         prompt "Type of MPC8xx IDE interface"
1019         depends on BLK_DEV_MPC8xx_IDE
1020         default IDE_8xx_PCCARD
1021
1022 config IDE_8xx_PCCARD
1023         bool "8xx_PCCARD"
1024         ---help---
1025           Select how the IDE devices are connected to the MPC8xx system:
1026
1027           8xx_PCCARD uses the 8xx internal PCMCIA interface in combination
1028           with a PC Card (e.g. ARGOSY portable Hard Disk Adapter),
1029           ATA PC Card HDDs or ATA PC Flash Cards (example: TQM8xxL
1030           systems)
1031
1032           8xx_DIRECT is used for directly connected IDE devices using the 8xx
1033           internal PCMCIA interface (example: IVMS8 systems)
1034
1035           EXT_DIRECT is used for IDE devices directly connected to the 8xx
1036           bus using some glue logic, but _not_ the 8xx internal
1037           PCMCIA interface (example: IDIF860 systems)
1038
1039 config IDE_8xx_DIRECT
1040         bool "8xx_DIRECT"
1041
1042 config IDE_EXT_DIRECT
1043         bool "EXT_DIRECT"
1044
1045 endchoice
1046
1047 # no isa -> no vlb
1048 if ISA
1049
1050 comment "Other IDE chipsets support"
1051 comment "Note: most of these also require special kernel boot parameters"
1052
1053 config BLK_DEV_4DRIVES
1054         bool "Generic 4 drives/port support"
1055         help
1056           Certain older chipsets, including the Tekram 690CD, use a single set
1057           of I/O ports at 0x1f0 to control up to four drives, instead of the
1058           customary two drives per port. Support for this can be enabled at
1059           runtime using the "ide0=four" kernel boot parameter if you say Y
1060           here.
1061
1062 config BLK_DEV_ALI14XX
1063         tristate "ALI M14xx support"
1064         help
1065           This driver is enabled at runtime using the "ali14xx.probe" kernel
1066           boot parameter.  It enables support for the secondary IDE interface
1067           of the ALI M1439/1443/1445/1487/1489 chipsets, and permits faster
1068           I/O speeds to be set as well.  See the files
1069           <file:Documentation/ide.txt> and <file:drivers/ide/legacy/ali14xx.c> for
1070           more info.
1071
1072 config BLK_DEV_DTC2278
1073         tristate "DTC-2278 support"
1074         help
1075           This driver is enabled at runtime using the "dtc2278.probe" kernel
1076           boot parameter. It enables support for the secondary IDE interface
1077           of the DTC-2278 card, and permits faster I/O speeds to be set as
1078           well. See the <file:Documentation/ide.txt> and
1079           <file:drivers/ide/legacy/dtc2278.c> files for more info.
1080
1081 config BLK_DEV_HT6560B
1082         tristate "Holtek HT6560B support"
1083         help
1084           This driver is enabled at runtime using the "ht6560b.probe" kernel
1085           boot parameter. It enables support for the secondary IDE interface
1086           of the Holtek card, and permits faster I/O speeds to be set as well.
1087           See the <file:Documentation/ide.txt> and
1088           <file:drivers/ide/legacy/ht6560b.c> files for more info.
1089
1090 config BLK_DEV_QD65XX
1091         tristate "QDI QD65xx support"
1092         help
1093           This driver is enabled at runtime using the "qd65xx.probe" kernel
1094           boot parameter.  It permits faster I/O speeds to be set.  See the
1095           <file:Documentation/ide.txt> and <file:drivers/ide/legacy/qd65xx.c> for
1096           more info.
1097
1098 config BLK_DEV_UMC8672
1099         tristate "UMC-8672 support"
1100         help
1101           This driver is enabled at runtime using the "umc8672.probe" kernel
1102           boot parameter. It enables support for the secondary IDE interface
1103           of the UMC-8672, and permits faster I/O speeds to be set as well.
1104           See the files <file:Documentation/ide.txt> and
1105           <file:drivers/ide/legacy/umc8672.c> for more info.
1106
1107 endif
1108
1109 config BLK_DEV_IDEDMA
1110         def_bool BLK_DEV_IDEDMA_PCI || BLK_DEV_IDEDMA_PMAC || BLK_DEV_IDEDMA_ICS || BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
1111
1112 config IDE_ARCH_OBSOLETE_INIT
1113         def_bool ALPHA || (ARM && !ARCH_L7200) || BLACKFIN || X86 || IA64 || M32R || MIPS || PARISC || PPC || (SUPERH64 && BLK_DEV_IDEPCI) || SPARC
1114
1115 endif
1116
1117 config BLK_DEV_HD_ONLY
1118         bool "Old hard disk (MFM/RLL/IDE) driver"
1119         depends on BLK_DEV_IDE=n
1120         help
1121           There are two drivers for MFM/RLL/IDE hard disks. Most people use
1122           the newer enhanced driver, but this old one is still around for two
1123           reasons. Some older systems have strange timing problems and seem to
1124           work only with the old driver (which itself does not work with some
1125           newer systems). The other reason is that the old driver is smaller,
1126           since it lacks the enhanced functionality of the new one. This makes
1127           it a good choice for systems with very tight memory restrictions, or
1128           for systems with only older MFM/RLL/ESDI drives. Choosing the old
1129           driver can save 13 KB or so of kernel memory.
1130
1131           If you are unsure, then just choose the Enhanced IDE/MFM/RLL driver
1132           instead of this one. For more detailed information, read the
1133           Disk-HOWTO, available from
1134           <http://www.tldp.org/docs.html#howto>.
1135
1136 config BLK_DEV_HD
1137         def_bool BLK_DEV_HD_IDE || BLK_DEV_HD_ONLY
1138
1139 endif # IDE