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NAME

     pcic - PC Card bridge driver

SYNOPSIS

     device pcic
     device card

DESCRIPTION

     The pcic driver controls the PC Card subsystem.  The pcic driver supports
     most ExCA devices attached to either ISA or PCI bus.  The pcic driver
     does not support the so-called TCIC controllers made by Databook.  Nor
     does it support the MECIA chipset found in some early PC98 NOTE PC
     machines.  The mecia driver now supports that bridge.

     The following ISA devices, or true clones, are supported in the current
     code.

     Intel i82365SL Step A
     Intel i82365SL Step B
     Intel i82365SL Step C  Intel’s original 16-bit PC Card controller.
     Intel i82365SL-DF      Intel’s last version of this device.  3.3V support
                            was added.
     VLSI 82C146            An older VLSI part with some issues on some
                            machines.
     Cirrus Logic PD-6710
     Cirrus Logic PD-6720
     Cirrus Logic PD-6722   Cirrus Logic’s pcic controller.  Compatible with
                            the i82365SL Step C with the addition of a
                            different 3.3V control.
     Ricoh RF5C296
     Ricoh RF5C396          Ricoh’s PC Card bridge chips.  These are
                            compatible with the i82365SL Step C, but with yet
                            another different 3.3V control.
     Vadem 365
     Vadem 465              Compatible with i82365SL Step C.
     Vadem 468
     Vadem 469              Like the earlier Vadem models, but with Vadem’s
                            own, incompatible, 3.3V control system.
     IBM PCIC               IBM clone of the original i82365SL part, with its
                            own ID register value.  Has no 3.3V ability.
     IBM KING               A strange clone of i82365SL.  This part has many
                            restrictions not found in the i82365SL, plus some
                            strange power control.  It has not been tested in
                            ages, but is believed to work.  Its use is
                            believed to be confined to model of ISA card,
                            available only in Japan.

     Many other vendors made parts in this arena, but most of them were
     compatible with one of the above chipsets.

     The following PCI cardbus and pcmcia bridges are supported:

     Cirrus Logic PD6729
     Cirrus Logic PD6730    These chips require special configuration when
                            they are on an add-in PCI card.
     Cirrus Logic PD6832
     Cirrus Logic PD6833

     O2micro OZ6729
     O2micro OZ6730
     O2micro OZ6812
     O2micro OZ6832
     O2micro OZ6833
     O2micro OZ6836
     O2micro OZ6860
     O2micro OZ6872         O2 Micro chips may be poorly supported because the
                            author does not have good access to machines with
                            one of these bridges in it.

     Ricoh RL4C475
     Ricoh RL4C476
     Ricoh RL4C477
     Ricoh RL4C478

     TI PCI-1031
     TI PCI-1130
     TI PCI-1131
     TI PCI-1211
     TI PCI-1220
     TI PCI-1221
     TI PCI-1225
     TI PCI-1250
     TI PCI-1251
     TI PCI-1251B
     TI PCI-1410
     TI PCI-1420
     TI PCI-1450
     TI PCI-1451
     TI PCI-4451

     Toshiba ToPIC95
     Toshiba ToPIC97
     Toshiba ToPIC100

FILES

     /dev/card0  Character device for the pcic driver.

MODES OF OPERATION

     The ISA device supports routing ISA interrupts only.  You cannot share
     ISA interrupts.  Every interrupt must be unique.

     The PCI device supports routing ISA or PCI interrupts.  PCI interrupts
     are sharable.  ISA interrupts are not sharable.  PCI interrupts should be
     used unless your machine has a specific problem using them.

     PCI interrupt routing is the default for PCI devices.  Some older laptops
     require ISA interrupt routing to work properly.  To enable ISA interrupt
     routing, you must set the tunable hw.pcic.intr_path=1 in
     /boot/loader.conf.  For the present, unless you have a one slot machine,
     you should set hw.pcic.irq=0 to force polling mode.  Two slot machines
     have minor issues with using an ISA interrupt for the CSC interrupt.

LOADER TUNABLES

     hw.pcic.ignore_function_1
             Needed for some, improperly manufactured PCI cards made by
             Orinoco.  It disables function 1 completely.  Set to 0 to enable
             function 1.  Set to 1 to disable function 1.  This tunable
             generally should not be needed on laptops.  The default is 0.

     hw.pcic.init_routing
             Some machines can tolerate interrupt routing selection at the
             cardbus bridge level.  Others fail when you mess with these
             registers.  Set to 1 to force the chipset to route via parallel
             PCI interrupts (as well as a few other little things).  Setting
             to 0, the default, forces the code to leave these registers as
             the code finds them.  Most laptops will not need to set this
             tunable.  Many PCI cards with cardbus chips on them are believed
             to need this tunable set to 1.  The default is 0.

     hw.pcic.intr_path
             Should PCI pcic devices route interrupts via ISA or PCI.  A value
             of 1 means route via ISA.  A value of 2 means route via PCI.
             This is ignored for the ISA device.  Many older laptops do not
             have PCI BIOS implementations that FreeBSD can use to route
             interrupts properly.  These laptops may need to set this to 1 and
             hw.pcic.irq to a value (or 0 for polling).  The default is 2.

     hw.pcic.irq
             Overrides the IRQ to use for ISA interrupt routing of the CSC or
             management interrupt.  If you are using the ISA device, you can
             set this tunable, or use the irq N clause in config file.  If you
             are using a PCI device in ISA interrupt mode (see
             hw.pcic.intr_path), then you must set the interrupt with this
             sysctl, or polling mode will be used.  Due to limitations in the
             tunable system, only one interrupt can be selected for all cards.
             Systems with multiple PCI bridges that need to use ISA routing
             are encouraged to use polling mode on each of the cards.  The
             default is 0.

     hw.pcic.ignore_pci
             Defaults to 0.  Set to 1 to completely ignore the cardbus bridge.
             This may help some old laptops work.  Setting to 1 on newer
             laptops will almost certainly fail.

HISTORY

     Too long to detail in the man page.

BUGS

     Too many to list.  Some are the fault of the standard.  Some are the
     fault of bad standard compliance.  Some are Warner’s fault.  These
     drivers are known as OLDCARD in other parts of the documentation.