44cb3ab02e
s/SYSCTLS/SYSCTL VARIABLES/ s/TUNABLES/LOADER TUNABLES/ s/CAVEAT/CAVEATS/ s/DESCIPTION/DESCRIPTION/ Reviewed by: ru MFC after: 3 days
245 lines
7.2 KiB
Groff
245 lines
7.2 KiB
Groff
.\"
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.\" Copyright (c) 2001 M. Warner Losh
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd August 25, 2001
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.Dt PCIC 4
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.Os
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.Sh NAME
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.Nm pcic
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.Nd PC Card bridge driver
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.Sh SYNOPSIS
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.Cd device pcic
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.Cd device card
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.Sh DESCRIPTION
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The
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.Nm
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driver controls the PC Card subsystem.
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The
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.Nm
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driver supports most
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.Tn ExCA
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devices attached to either
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.Tn ISA
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or
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.Tn PCI
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bus.
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The
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.Nm
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driver does not support the so-called TCIC controllers made by
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Databook.
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Nor does it support the MECIA chipset found in some early PC98
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NOTE PC machines.
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The mecia driver now supports that bridge.
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.Pp
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The following
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.Tn ISA
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devices, or true clones, are supported in the current code.
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.Pp
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.Bl -tag -width "Intel i82365SL Step A" -compact
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.It Intel i82365SL Step A
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.It Intel i82365SL Step B
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.It Intel i82365SL Step C
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.Tn Intel Ns 's
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original 16-bit PC Card controller.
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.It Intel i82365SL-DF
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.Tn Intel Ns 's
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last version of this device.
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3.3V support was added.
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.It VLSI 82C146
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An older VLSI part with some issues on some machines.
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.It Cirrus Logic PD-6710
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.It Cirrus Logic PD-6720
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.It Cirrus Logic PD-6722
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Cirrus Logic's pcic controller.
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Compatible with the i82365SL Step C with the addition of a different
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3.3V control.
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.It Ricoh RF5C296
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.It Ricoh RF5C396
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Ricoh's PC Card bridge chips.
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These are compatible with the i82365SL Step C, but with yet another
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different 3.3V control.
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.It Vadem 365
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.It Vadem 465
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Compatible with i82365SL Step C.
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.It Vadem 468
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.It Vadem 469
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Like the earlier Vadem models, but with Vadem's own, incompatible, 3.3V
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control system.
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.It IBM PCIC
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.Tn IBM
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clone of the original i82365SL part, with its own ID register value.
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Has no 3.3V ability.
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.It IBM KING
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A strange clone of i82365SL.
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This part has many restrictions not found in the i82365SL, plus some
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strange power control.
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It has not been tested in ages, but is believed to work.
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Its use is believed to be confined to model of ISA card, available
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only in Japan.
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.El
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.Pp
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Many other vendors made parts in this arena, but most of them were
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compatible with one of the above chipsets.
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.Pp
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The following PCI cardbus and pcmcia bridges are supported:
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.Pp
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.Bl -tag -width "Intel i82365SL Step A" -compact
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.It Cirrus Logic PD6729
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.It Cirrus Logic PD6730
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These chips require special configuration when they are on an add-in
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PCI card.
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.It Cirrus Logic PD6832
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.It Cirrus Logic PD6833
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.Pp
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.It O2micro OZ6729
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.It O2micro OZ6730
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.It O2micro OZ6812
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.It O2micro OZ6832
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.It O2micro OZ6833
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.It O2micro OZ6836
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.It O2micro OZ6860
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.It O2micro OZ6872
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O2 Micro chips may be poorly supported because the author does not
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have good access to machines with one of these bridges in it.
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.Pp
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.It Ricoh RL4C475
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.It Ricoh RL4C476
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.It Ricoh RL4C477
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.It Ricoh RL4C478
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.Pp
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.It TI PCI-1031
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.It TI PCI-1130
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.It TI PCI-1131
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.It TI PCI-1211
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.It TI PCI-1220
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.It TI PCI-1221
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.It TI PCI-1225
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.It TI PCI-1250
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.It TI PCI-1251
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.It TI PCI-1251B
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.It TI PCI-1410
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.It TI PCI-1420
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.It TI PCI-1450
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.It TI PCI-1451
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.It TI PCI-4451
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.Pp
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.It Toshiba ToPIC95
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.It Toshiba ToPIC97
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.It Toshiba ToPIC100
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.El
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.Sh FILES
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.Bl -tag -width ".Pa /dev/card0" -compact
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.It Pa /dev/card0
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Character device for the
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.Nm
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driver.
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.El
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.Sh MODES OF OPERATION
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The ISA device supports routing ISA interrupts only.
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You cannot share ISA interrupts.
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Every interrupt must be unique.
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.Pp
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The PCI device supports routing ISA or PCI interrupts.
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PCI interrupts are sharable.
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ISA interrupts are not sharable.
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PCI interrupts should be used unless your machine has a specific problem using
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them.
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.Pp
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PCI interrupt routing is the default for PCI devices.
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Some older laptops require ISA interrupt routing to work properly.
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To enable ISA interrupt routing, you must set the tunable
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.Li hw.pcic.intr_path=1
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in
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.Pa /boot/loader.conf .
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For the present, unless you have a one slot machine, you should set
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.Li hw.pcic.irq=0
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to force polling mode.
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Two slot machines have minor issues with using an ISA interrupt for the
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CSC interrupt.
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.Sh LOADER TUNABLES
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.Bl -tag -width indent
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.It Va hw.pcic.ignore_function_1
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Needed for some, improperly manufactured PCI cards made by Orinoco.
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It disables function 1 completely.
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Set to 0 to enable function 1.
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Set to 1 to disable function 1.
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This tunable generally should not be needed on laptops.
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The default is 0.
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.It Va hw.pcic.init_routing
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Some machines can tolerate interrupt routing selection at the cardbus
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bridge level.
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Others fail when you mess with these registers.
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Set to 1 to force the chipset to route via parallel PCI interrupts (as
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well as a few other little things).
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Setting to 0, the default, forces the code to leave these registers as the
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code finds them.
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Most laptops will not need to set this tunable.
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Many PCI cards with cardbus chips on them are believed to need this
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tunable set to 1.
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The default is 0.
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.It Va hw.pcic.intr_path
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Should PCI pcic devices route interrupts via ISA or PCI.
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A value of 1 means route via ISA.
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A value of 2 means route via PCI.
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This is ignored for the ISA device.
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Many older laptops do not have PCI BIOS implementations that
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.Fx
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can use to route interrupts properly.
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These laptops may need to set this to 1 and
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.Va hw.pcic.irq
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to a value
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(or 0 for polling).
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The default is 2.
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.It Va hw.pcic.irq
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Overrides the IRQ to use for ISA interrupt routing of the CSC or
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management interrupt.
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If you are using the ISA device, you can set this tunable, or use the
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.Cd "irq N"
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clause in config file.
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If you are using a PCI device in ISA interrupt mode (see
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.Va hw.pcic.intr_path ) ,
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then you must set the interrupt with this
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sysctl, or polling mode will be used.
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Due to limitations in the tunable system, only one interrupt can be selected
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for all cards.
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Systems with multiple PCI bridges that need to use ISA routing are encouraged
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to use polling mode on each of the cards.
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The default is 0.
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.It Va hw.pcic.ignore_pci
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Defaults to 0.
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Set to 1 to completely ignore the cardbus bridge.
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This may help some old laptops work.
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Setting to 1 on newer laptops will almost certainly fail.
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.El
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.Sh HISTORY
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Too long to detail in the man page.
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.Sh BUGS
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Too many to list.
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Some are the fault of the standard.
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Some are the fault of bad standard compliance.
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Some are Warner's fault.
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These drivers are known as OLDCARD in other parts of the documentation.
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