USB umass problem on 5.2-release

From: Denis Antrushin (DAntrushin_at_mail.ru)
Date: 02/12/04

  • Next message: Alexander Leidinger: "Re: Bad interrupt routing causes my SATA controller to fail." 
    Date: Thu, 12 Feb 2004 14:06:33 +0300
To: freebsd-current@freebsd.org

    Hi,

    This kind of questions was asked many times before, but after reading all that
    postings I still cannot fix things by myself, so I'm asking for help here...

    I have USB Flash Drive (Pretec i-Disk 128Mb), and it was working OK with my home
    5.1 freebsd machine (ASUS A7M266 motherboard with AMD 761/VIA xxxx)
    Recently I decided to upgrade to 5.2-release and whoops... I've got that nasty
    messages:

    umass0: BBB reset failed, TIMEOUT
    umass0: BBB bulk-in clear stall failed, TIMEOUT
    umass0: BBB bulk-out clear stall failed, TIMEOUT

    Well, I digged archives and read about USB quirks, so I added DA_OLD_QUIRKS to
    kernel config and recompiled... no effect. I played a bit with quirks in umass.c,
    but this ended up with hangs and panics :-)

    But, the this flash drive works OK on my work machine, which is 5.2-release as
    well (but is ASUS P4BGL MB with Intel 845GL chipset), so I guess, this is not
    device itself, but USB controller/hub/... issue?

    I attach dmesg output (with CAMDEBUG options in kernel, and w/o USB quirks) and
    my kernel config

    What should I do to fix that problem?
    Any help is highly appretiated!

    Thanks,
         Denis

    Copyright (c) 1992-2004 The FreeBSD Project.
    Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
            The Regents of the University of California. All rights reserved.
    FreeBSD 5.2-RELEASE #2: Wed Feb 11 21:07:32 GMT 2004
        root@:/usr/obj/usr/src/sys/GENERIC
    Preloaded elf kernel "/boot/kernel/kernel" at 0xc099c000.
    Preloaded elf module "/boot/kernel/acpi.ko" at 0xc099c21c.
    Timecounter "i8254" frequency 1193182 Hz quality 0
    CPU: AMD Athlon(tm) Processor (1200.05-MHz 686-class CPU)
      Origin = "AuthenticAMD" Id = 0x642 Stepping = 2
      Features=0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR>
      AMD Features=0xc0440000<RSVD,AMIE,DSP,3DNow!>
    real memory = 536788992 (511 MB)
    avail memory = 511754240 (488 MB)
    Pentium Pro MTRR support enabled
    npx0: [FAST]
    npx0: <math processor> on motherboard
    npx0: INT 16 interface
    acpi0: <ASUS A7M266 > on motherboard
    pcibios: BIOS version 2.10
    Using $PIR table, 9 entries at 0xc00f1370
    acpi0: Power Button (fixed)
    Timecounter "ACPI-safe" frequency 3579545 Hz quality 1000
    acpi_timer0: <24-bit timer at 3.579545MHz> port 0xe408-0xe40b on acpi0
    acpi_cpu0: <CPU> on acpi0
    acpi_button0: <Power Button> on acpi0
    pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
    pci0: <ACPI PCI bus> on pcib0
    pcib0: slot 4 INTD is routed to irq 5
    pcib0: slot 4 INTD is routed to irq 5
    pcib0: slot 5 INTA is routed to irq 10
    agp0: <AMD 761 host to AGP bridge> port 0xe000-0xe003 mem 0xf7800000-0xf7800fff,0xf8000000-0xfbffffff at device 0.0 on pci0
    pcib1: <ACPI PCI-PCI bridge> at device 1.0 on pci0
    pci1: <ACPI PCI bus> on pcib1
    pcib1: slot 5 INTA is routed to irq 11
    pci1: <display, VGA> at device 5.0 (no driver attached)
    isab0: <PCI-ISA bridge> at device 4.0 on pci0
    isa0: <ISA bus> on isab0
    atapci0: <VIA 82C686B UDMA100 controller> port 0xd800-0xd80f at device 4.1 on pci0
    ata0: at 0x1f0 irq 14 on atapci0
    ata0: [MPSAFE]
    ata1: at 0x170 irq 15 on atapci0
    ata1: [MPSAFE]
    uhci0: <VIA 83C572 USB controller> port 0xd400-0xd41f irq 5 at device 4.2 on pci0
    uhci0: LegSup = 0x003a
    usb0: <VIA 83C572 USB controller> on uhci0
    usb0: USB revision 1.0
    uhub0: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
    uhub0: 2 ports with 2 removable, self powered
    umass0: USB Flash Disk, rev 1.10/1.10, addr 2
    umass0: SCSI over Bulk-Only; quirks = 0x0000
    umass0:0:0:-1: Attached to scbus0
    ums0: Logitech USB Receiver, rev 1.10/9.10, addr 3, iclass 3/1
    ums0: 5 buttons and Z dir.
    uhci1: <VIA 83C572 USB controller> port 0xd000-0xd01f irq 5 at device 4.3 on pci0
    uhci1: LegSup = 0x0010
    usb1: <VIA 83C572 USB controller> on uhci1
    usb1: USB revision 1.0
    uhub1: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
    uhub1: 2 ports with 2 removable, self powered
    pci0: <old, non-VGA display device> at device 4.4 (no driver attached)
    pci0: <multimedia, audio> at device 5.0 (no driver attached)
    fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> port 0x3f7,0x3f2-0x3f5 irq 6 drq 2 on acpi0
    fdc0: FIFO enabled, 8 bytes threshold
    fd0: <1440-KB 3.5" drive> on fdc0 drive 0
    sio0 port 0x3f8-0x3ff irq 4 on acpi0
    sio0: type 16550A
    sio1 port 0x2f8-0x2ff irq 3 on acpi0
    sio1: type 16550A
    atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
    atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
    kbd0 at atkbd0
    orm0: <Option ROM> at iomem 0xcc000-0xcffff on isa0
    pmtimer0 on isa0
    ppc0: parallel port not found.
    sc0: <System console> at flags 0x100 on isa0
    sc0: VGA <16 virtual consoles, flags=0x300>
    vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
    Timecounter "TSC" frequency 1200051626 Hz quality 800
    Timecounters tick every 10.000 msec
    acpi_cpu: throttling enabled, 16 steps (100% to 6.2%), currently 100.0%
    GEOM: create disk ad0 dp=0xc489ed60
    ad0: 38166MB <WDC WD400BB-00CLB0> [77545/16/63] at ata0-master UDMA100
    GEOM: create disk ad1 dp=0xc489ea60
    ad1: 38166MB <ST340016A> [77545/16/63] at ata0-slave UDMA100
    GEOM: create disk ad2 dp=0xc489e360
    ad2: 19470MB <QUANTUM FIREBALL CX20.4A> [39560/16/63] at ata1-master UDMA66
    (noperiph:umass-sim0:0:-1:-1): xpt_compile_path
    (noperiph:umass-sim0:0:-1:-1): xpt_setup_ccb
    (noperiph:umass-sim0:0:-1:-1): xpt_action
    (noperiph:umass-sim0:0:-1:-1): xpt_done
    (noperiph:umass-sim0:0:-1:-1): xpt_release_path
    (xpt0:umass-sim0:0:-1:-1): xpt_compile_path
    (xpt0:umass-sim0:0:-1:-1): xpt_setup_ccb
    (xpt0:umass-sim0:0:-1:-1): xpt_action
    (xpt0:umass-sim0:0:-1:-1): xpt_done
    (xpt0:umass-sim0:0:-1:-1): xpt_finishconfig
    (xpt0:umass-sim0:0:-1:-1): xpt_action
    (xpt0:umass-sim0:0:-1:-1): xpt_scan_bus
    (xpt0:umass-sim0:0:-1:-1): xpt_setup_ccb
    (xpt0:umass-sim0:0:-1:-1): xpt_action
    (xpt0:umass-sim0:0:-1:-1): xpt_done
    (xpt0:umass-sim0:0:0:0): xpt_compile_path
    (xpt0:umass-sim0:0:0:0): xpt_setup_ccb
    (xpt0:umass-sim0:0:0:0): xpt_action
    (xpt0:umass-sim0:0:0:0): xpt_scan_lun
    (xpt0:umass-sim0:0:0:0): xpt_setup_ccb
    (xpt0:umass-sim0:0:0:0): xpt_action
    (xpt0:umass-sim0:0:0:0): xpt_done
    (probe0:umass-sim0:0:0:0): xpt_compile_path
    (probe0:umass-sim0:0:0:0): xpt_setup_ccb
    (probe0:umass-sim0:0:0:0): xpt_action
    (probe0:umass-sim0:0:0:0): xpt_setup_ccb
    (probe0:umass-sim0:0:0:0): xpt_action
    (probe0:umass-sim0:0:0:0): xpt_setup_ccb
    (probe0:umass-sim0:0:0:0): xpt_action
    (probe0:umass-sim0:0:0:0): xpt_done
    (probe0:umass-sim0:0:0:0): xpt_schedule
    (probe0:umass-sim0:0:0:0): xpt_setup_ccb
    (probe0:umass-sim0:0:0:0): probestart
    (probe0:umass-sim0:0:0:0): xpt_action
    (probe0:umass-sim0:0:0:0): INQUIRY. CDB: 12 0 0 0 24 0
    umass0: BBB reset failed, TIMEOUT
    umass0: BBB bulk-in clear stall failed, TIMEOUT
    umass0: BBB bulk-out clear stall failed, TIMEOUT
    (probe0:umass-sim0:0:0:0): xpt_done
    (probe0:umass-sim0:0:0:0): camisr
    (probe0:umass-sim0:0:0:0): probedone
    (probe0:umass-sim0:0:0:0): xpt_action
    (probe0:umass-sim0:0:0:0): INQUIRY. CDB: 12 0 0 0 24 0
    umass0: BBB reset failed, TIMEOUT
    umass0: BBB bulk-in clear stall failed, TIMEOUT
    umass0: BBB bulk-out clear stall failed, TIMEOUT
    (probe0:umass-sim0:0:0:0): xpt_done
    (probe0:umass-sim0:0:0:0): camisr
    (probe0:umass-sim0:0:0:0): probedone
    (probe0:umass-sim0:0:0:0): xpt_action
    (probe0:umass-sim0:0:0:0): INQUIRY. CDB: 12 0 0 0 24 0
    umass0: BBB reset failed, TIMEOUT
    umass0: BBB bulk-in clear stall failed, TIMEOUT
    umass0: BBB bulk-out clear stall failed, TIMEOUT
    (probe0:umass-sim0:0:0:0): xpt_done
    (probe0:umass-sim0:0:0:0): camisr
    (probe0:umass-sim0:0:0:0): probedone
    (probe0:umass-sim0:0:0:0): xpt_action
    (probe0:umass-sim0:0:0:0): INQUIRY. CDB: 12 0 0 0 24 0
    umass0: BBB reset failed, TIMEOUT
    umass0: BBB bulk-in clear stall failed, TIMEOUT
    umass0: BBB bulk-out clear stall failed, TIMEOUT
    (probe0:umass-sim0:0:0:0): xpt_done
    (probe0:umass-sim0:0:0:0): camisr
    (probe0:umass-sim0:0:0:0): probedone
    (probe0:umass-sim0:0:0:0): xpt_action
    (probe0:umass-sim0:0:0:0): INQUIRY. CDB: 12 0 0 0 24 0
    umass0: BBB reset failed, TIMEOUT
    umass0: BBB bulk-in clear stall failed, TIMEOUT
    umass0: BBB bulk-out clear stall failed, TIMEOUT
    (probe0:umass-sim0:0:0:0): xpt_done
    (probe0:umass-sim0:0:0:0): camisr
    (probe0:umass-sim0:0:0:0): probedone
    (xpt0:umass-sim0:0:0:0): xpt_done
    (probe0:umass-sim0:0:0:0): xpt_free_path
    (probe0:umass-sim0:0:0:0): xpt_release_path
    (xpt0:umass-sim0:0:0:0): camisr
    (xpt0:umass-sim0:0:0:0): xpt_scan_bus
    (xpt0:umass-sim0:0:0:0): xpt_setup_ccb
    (xpt0:umass-sim0:0:0:0): xpt_action
    (xpt0:umass-sim0:0:0:0): xpt_free_path
    (xpt0:umass-sim0:0:0:0): xpt_release_path
    (xpt0:umass-sim0:0:-1:-1): xpt_done
    (xpt0:umass-sim0:0:-1:-1): camisr
    (xpt0:umass-sim0:0:-1:-1): xpt_finishconfig
    (xpt0:umass-sim0:0:-1:-1): xpt_free_path
    (xpt0:umass-sim0:0:-1:-1): xpt_release_path
    (noperiph:xpt0:0:-1:-1): xpt_compile_path
    (noperiph:xpt0:0:-1:-1): xpt_setup_ccb
    (noperiph:xpt0:0:-1:-1): xpt_action
    (noperiph:xpt0:0:-1:-1): xpt_free_path
    (noperiph:xpt0:0:-1:-1): xpt_release_path
    (noperiph:xpt0:0:-1:-1): xpt_compile_path
    (noperiph:xpt0:0:-1:-1): xpt_setup_ccb
    (noperiph:xpt0:0:-1:-1): xpt_action
    (noperiph:xpt0:0:-1:-1): xpt_free_path
    (noperiph:xpt0:0:-1:-1): xpt_release_path
    (noperiph:xpt0:0:-1:-1): xpt_compile_path
    (noperiph:xpt0:0:-1:-1): xpt_setup_ccb
    (noperiph:xpt0:0:-1:-1): xpt_action
    (noperiph:xpt0:0:-1:-1): xpt_free_path
    (noperiph:xpt0:0:-1:-1): xpt_release_path
    (noperiph:xpt0:0:-1:-1): xpt_compile_path
    (noperiph:xpt0:0:-1:-1): xpt_setup_ccb
    (noperiph:xpt0:0:-1:-1): xpt_action
    (noperiph:xpt0:0:-1:-1): xpt_free_path
    (noperiph:xpt0:0:-1:-1): xpt_release_path
    (noperiph:xpt0:0:-1:-1): xpt_compile_path
    (noperiph:xpt0:0:-1:-1): xpt_setup_ccb
    (noperiph:xpt0:0:-1:-1): xpt_action
    (noperiph:xpt0:0:-1:-1): xpt_free_path
    (noperiph:xpt0:0:-1:-1): xpt_release_path
    (noperiph:xpt0:0:-1:-1): xpt_compile_path
    (noperiph:xpt0:0:-1:-1): xpt_setup_ccb
    (noperiph:xpt0:0:-1:-1): xpt_action
    (noperiph:xpt0:0:-1:-1): xpt_free_path
    (noperiph:xpt0:0:-1:-1): xpt_release_path
    Mounting root from ufs:/dev/ad1s1a

    #
    # GENERIC -- Generic kernel configuration file for FreeBSD/i386
    #
    # For more information on this file, please read the handbook section on
    # Kernel Configuration Files:
    #
    # http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-config.html
    #
    # The handbook is also available locally in /usr/share/doc/handbook
    # if you've installed the doc distribution, otherwise always see the
    # FreeBSD World Wide Web server (http://www.FreeBSD.org/) for the
    # latest information.
    #
    # An exhaustive list of options and more detailed explanations of the
    # device lines is also present in the ../../conf/NOTES and NOTES files.
    # If you are in doubt as to the purpose or necessity of a line, check first
    # in NOTES.
    #
    # $FreeBSD: src/sys/i386/conf/GENERIC,v 1.394.2.2 2003/12/07 23:52:53 scottl Exp $

    machine i386
    #cpu I486_CPU
    #cpu I586_CPU
    cpu I686_CPU
    ident GENERIC

    #To statically compile in device wiring instead of /boot/device.hints
    #hints "GENERIC.hints" #Default places to look for devices.

    #makeoptions DEBUG=-g #Build kernel with gdb(1) debug symbols

    options SCHED_4BSD #4BSD scheduler
    options INET #InterNETworking
    #options INET6 #IPv6 communications protocols
    options FFS #Berkeley Fast Filesystem
    options SOFTUPDATES #Enable FFS soft updates support
    #options UFS_ACL #Support for access control lists
    options UFS_DIRHASH #Improve performance on big directories
    options MD_ROOT #MD is a potential root device
    #options NFSCLIENT #Network Filesystem Client
    #options NFSSERVER #Network Filesystem Server
    #options NFS_ROOT #NFS usable as /, requires NFSCLIENT
    options MSDOSFS #MSDOS Filesystem
    options CD9660 #ISO 9660 Filesystem
    options PROCFS #Process filesystem (requires PSEUDOFS)
    options PSEUDOFS #Pseudo-filesystem framework
    options COMPAT_43 #Compatible with BSD 4.3 [KEEP THIS!]
    options COMPAT_FREEBSD4 #Compatible with FreeBSD4
    options SCSI_DELAY=15000 #Delay (in ms) before probing SCSI
    options KTRACE #ktrace(1) support
    options SYSVSHM #SYSV-style shared memory
    options SYSVMSG #SYSV-style message queues
    options SYSVSEM #SYSV-style semaphores
    options _KPOSIX_PRIORITY_SCHEDULING #Posix P1003_1B real-time extensions
    options KBD_INSTALL_CDEV # install a CDEV entry in /dev
    options AHC_REG_PRETTY_PRINT # Print register bitfields in debug
                                            # output. Adds ~128k to driver.
    options AHD_REG_PRETTY_PRINT # Print register bitfields in debug
                                            # output. Adds ~215k to driver.

    # Debugging for use in -current
    #options DDB #Enable the kernel debugger
    #options INVARIANTS #Enable calls of extra sanity checking
    options INVARIANT_SUPPORT #Extra sanity checks of internal structures, required by INVARIANTS
    #options WITNESS #Enable checks to detect deadlocks and cycles
    #options WITNESS_SKIPSPIN #Don't run witness on spinlocks for speed

    # DEBUG_ADU
    options CAMDEBUG
    options CAM_DEBUG_BUS=-1
    options CAM_DEBUG_TARGET=-1
    options CAM_DEBUG_LUN=-1
    options CAM_DEBUG_FLAGS=(CAM_DEBUG_INFO|CAM_DEBUG_TRACE|CAM_DEBUG_CDB)
    options DA_OLD_QUIRKS
    options USB_DEBUG

    # To make an SMP kernel, the next two are needed
    options SMP # Symmetric MultiProcessor Kernel
    device apic # I/O APIC

    device isa
    device eisa
    device pci

    # Floppy drives
    device fdc

    # ATA and ATAPI devices
    device ata
    device atadisk # ATA disk drives
    device ataraid # ATA RAID drives
    device atapicd # ATAPI CDROM drives
    device atapifd # ATAPI floppy drives
    device atapist # ATAPI tape drives
    options ATA_STATIC_ID #Static device numbering

    # SCSI Controllers
    device ahb # EISA AHA1742 family
    device ahc # AHA2940 and onboard AIC7xxx devices
    device ahd # AHA39320/29320 and onboard AIC79xx devices
    device amd # AMD 53C974 (Tekram DC-390(T))
    device isp # Qlogic family
    device mpt # LSI-Logic MPT-Fusion
    #device ncr # NCR/Symbios Logic
    device sym # NCR/Symbios Logic (newer chipsets + those of `ncr')
    device trm # Tekram DC395U/UW/F DC315U adapters

    device adv # Advansys SCSI adapters
    device adw # Advansys wide SCSI adapters
    device aha # Adaptec 154x SCSI adapters
    device aic # Adaptec 15[012]x SCSI adapters, AIC-6[23]60.
    device bt # Buslogic/Mylex MultiMaster SCSI adapters

    device ncv # NCR 53C500
    device nsp # Workbit Ninja SCSI-3
    device stg # TMC 18C30/18C50

    # SCSI peripherals
    device scbus # SCSI bus (required for SCSI)
    device ch # SCSI media changers
    device da # Direct Access (disks)
    device sa # Sequential Access (tape etc)
    device cd # CD
    device pass # Passthrough device (direct SCSI access)
    device ses # SCSI Environmental Services (and SAF-TE)

    # RAID controllers interfaced to the SCSI subsystem
    device amr # AMI MegaRAID
    device asr # DPT SmartRAID V, VI and Adaptec SCSI RAID
    device ciss # Compaq Smart RAID 5*
    device dpt # DPT Smartcache III, IV - See NOTES for options
    device iir # Intel Integrated RAID
    device ips # IBM (Adaptec) ServeRAID
    device mly # Mylex AcceleRAID/eXtremeRAID

    # RAID controllers
    device aac # Adaptec FSA RAID
    device aacp # SCSI passthrough for aac (requires CAM)
    device ida # Compaq Smart RAID
    device mlx # Mylex DAC960 family
    device pst # Promise Supertrak SX6000
    device twe # 3ware ATA RAID

    # atkbdc0 controls both the keyboard and the PS/2 mouse
    device atkbdc # AT keyboard controller
    device atkbd # AT keyboard
    device psm # PS/2 mouse

    device vga # VGA video card driver

    device splash # Splash screen and screen saver support

    # syscons is the default console driver, resembling an SCO console
    device sc

    # Enable this for the pcvt (VT220 compatible) console driver
    #device vt
    #options XSERVER # support for X server on a vt console
    #options FAT_CURSOR # start with block cursor

    device agp # support several AGP chipsets

    # Floating point support - do not disable.
    device npx

    # Power management support (see NOTES for more options)
    #device apm
    # Add suspend/resume support for the i8254.
    device pmtimer

    # PCCARD (PCMCIA) support
    # Pcmcia and cardbus bridge support
    device cbb # cardbus (yenta) bridge
    #device pcic # ExCA ISA and PCI bridges
    device pccard # PC Card (16-bit) bus
    device cardbus # CardBus (32-bit) bus

    # Serial (COM) ports
    device sio # 8250, 16[45]50 based serial ports

    # Parallel port
    device ppc
    device ppbus # Parallel port bus (required)
    device lpt # Printer
    device plip # TCP/IP over parallel
    device ppi # Parallel port interface device
    #device vpo # Requires scbus and da

    # If you've got a "dumb" serial or parallel PCI card that is
    # supported by the puc(4) glue driver, uncomment the following
    # line to enable it (connects to the sio and/or ppc drivers):
    #device puc

    # PCI Ethernet NICs.
    device de # DEC/Intel DC21x4x (``Tulip'')
    device em # Intel PRO/1000 adapter Gigabit Ethernet Card
    device txp # 3Com 3cR990 (``Typhoon'')
    device vx # 3Com 3c590, 3c595 (``Vortex'')

    # PCI Ethernet NICs that use the common MII bus controller code.
    # NOTE: Be sure to keep the 'device miibus' line in order to use these NICs!
    device miibus # MII bus support
    device bfe # Broadcom BCM440x 10/100 ethernet
    device bge # Broadcom BCM570xx Gigabit Ethernet
    device dc # DEC/Intel 21143 and various workalikes
    device fxp # Intel EtherExpress PRO/100B (82557, 82558)
    device pcn # AMD Am79C97x PCI 10/100 (precedence over 'lnc')
    device re # RealTek 8139C+/8169/8169S/8110S
    device rl # RealTek 8129/8139
    device sf # Adaptec AIC-6915 (``Starfire'')
    device sis # Silicon Integrated Systems SiS 900/SiS 7016
    device sk # SysKonnect SK-984x and SK-982x gigabit ethernet
    device ste # Sundance ST201 (D-Link DFE-550TX)
    device ti # Alteon Networks Tigon I/II gigabit ethernet
    device tl # Texas Instruments ThunderLAN
    device tx # SMC EtherPower II (83c170 ``EPIC'')
    device vr # VIA Rhine, Rhine II
    device wb # Winbond W89C840F
    device xl # 3Com 3c90x (``Boomerang'', ``Cyclone'')

    # ISA Ethernet NICs. pccard nics included.
    device cs # Crystal Semiconductor CS89x0 NIC
    # 'device ed' requires 'device miibus'
    device ed # NE[12]000, SMC Ultra, 3c503, DS8390 cards
    device ex # Intel EtherExpress Pro/10 and Pro/10+
    device ep # Etherlink III based cards
    device fe # Fujitsu MB8696x based cards
    device ie # EtherExpress 8/16, 3C507, StarLAN 10 etc.
    device lnc # NE2100, NE32-VL Lance Ethernet cards
    device sn # SMC's 9000 series of ethernet chips
    device xe # Xircom pccard ethernet

    # ISA devices that use the old ISA shims
    #device le

    # Wireless NIC cards
    device wlan # 802.11 support
    device an # Aironet 4500/4800 802.11 wireless NICs.
    device awi # BayStack 660 and others
    device wi # WaveLAN/Intersil/Symbol 802.11 wireless NICs.
    #device wl # Older non 802.11 Wavelan wireless NIC.

    # Pseudo devices - the number indicates how many units to allocate.
    device random # Entropy device
    device loop # Network loopback
    device ether # Ethernet support
    device sl # Kernel SLIP
    device ppp # Kernel PPP
    device tun # Packet tunnel.
    device pty # Pseudo-ttys (telnet etc)
    device md # Memory "disks"
    device gif # IPv6 and IPv4 tunneling
    device faith # IPv6-to-IPv4 relaying (translation)

    # The `bpf' device enables the Berkeley Packet Filter.
    # Be aware of the administrative consequences of enabling this!
    device bpf # Berkeley packet filter

    # USB support
    device uhci # UHCI PCI->USB interface
    device ohci # OHCI PCI->USB interface
    device usb # USB Bus (required)
    #device udbp # USB Double Bulk Pipe devices
    device ugen # Generic
    device uhid # "Human Interface Devices"
    #device ukbd # Keyboard
    #device ulpt # Printer
    device umass # Disks/Mass storage - Requires scbus and da
    device ums # Mouse
    #device urio # Diamond Rio 500 MP3 player
    #device uscanner # Scanners
    # USB Ethernet, requires mii
    #device aue # ADMtek USB ethernet
    #device axe # ASIX Electronics USB ethernet
    #device cue # CATC USB ethernet
    #device kue # Kawasaki LSI USB ethernet

    # FireWire support
    #device firewire # FireWire bus code
    #device sbp # SCSI over FireWire (Requires scbus and da)
    #device fwe # Ethernet over FireWire (non-standard!)

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