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PCIC(4)			 BSD Kernel Interfaces Manual		       PCIC(4)

     pcic -- PC	Card bridge driver

     device pcic
     device card

     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	ma-
     chines.  The mecia	driver now supports that bridge.

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

     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	ma-
     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 differ-
			    ent	3.3V control.
     Ricoh RF5C296
     Ricoh RF5C396	    Ricoh's PC Card bridge chips.  These are compati-
			    ble	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 be-
			    lieved to be confined to model of ISA card,	avail-
			    able only in Japan.

     Many other	vendors	made parts in this arena, but most of them were	com-
     patible 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

     /dev/card0	 Character device for the pcic driver.

     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.

	     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	gener-
	     ally should not be	needed on laptops.  The	default	is 0.

	     Some machines can tolerate	interrupt routing selection at the
	     cardbus bridge level.  Others fail	when you mess with these reg-
	     isters.  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.

	     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 in-
	     terrupts 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.

	     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 de-
	     fault is 0.

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

     Too long to detail	in the man page.

     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	driv-
     ers are known as OLDCARD in other parts of	the documentation.

BSD				August 25, 2001				   BSD


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