Add watchdog support for VIA south bridge chipset.
Tested on VT8251, VX900 but CX700, VX800, VX855 should works. MFC after: 1 month Sponsored by: NETASQ
This commit is contained in:
parent
5fd0e7aabd
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e31b2d85e2
@ -499,6 +499,7 @@ MAN= aac.4 \
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vga.4 \
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vge.4 \
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viapm.4 \
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${_viawd.4} \
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vinum.4 \
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vkbd.4 \
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vlan.4 \
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@ -711,6 +712,7 @@ _speaker.4= speaker.4
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_spkr.4= spkr.4
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_tpm.4= tpm.4
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_urtw.4= urtw.4
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_viawd.4= viawd.4
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_wpi.4= wpi.4
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_xen.4= xen.4
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79
share/man/man4/viawd.4
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79
share/man/man4/viawd.4
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@ -0,0 +1,79 @@
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.\"-
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.\" Copyright (c) 2011 Fabien Thomas <fabient@FreeBSD.org>
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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. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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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 December 7, 2011
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.Dt VIAWD 4
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.Os
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.Sh NAME
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.Nm viawd
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.Nd device driver for VIA south bridge watchdog timer
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.Sh SYNOPSIS
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To compile this driver into the kernel,
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place the following line in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device viawd"
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.Ed
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.Pp
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Alternatively, to load the driver as a
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module at boot time, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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viawd_load="YES"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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driver provides
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.Xr watchdog 4
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support for the watchdog interrupt timer present on
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VIA south bridge chipset (VT8251, CX700, VX800, VX855, VX900).
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.Pp
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The VIA south bridge have a built-in watchdog timer,
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which can be enabled and disabled by user's program and set between
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1 to 1023 seconds.
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.Pp
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The
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.Nm
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driver when unloaded with running watchdog will reschedule the watchdog
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to 5 minutes.
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.Sh SEE ALSO
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.Xr watchdog 4 ,
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.Xr watchdog 8 ,
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.Xr watchdogd 8 ,
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.Xr watchdog 9
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Fx 10.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver and this manual page were written by
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.An Fabien Thomas Aq fabient@FreeBSD.org .
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@ -458,6 +458,7 @@ device tpm
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#
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device ichwd
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device amdsbwd
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device viawd
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#
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# Temperature sensors:
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@ -260,6 +260,7 @@ dev/tpm/tpm.c optional tpm
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dev/tpm/tpm_acpi.c optional tpm acpi
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dev/tpm/tpm_isa.c optional tpm isa
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dev/uart/uart_cpu_amd64.c optional uart
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dev/viawd/viawd.c optional viawd
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dev/wpi/if_wpi.c optional wpi
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isa/syscons_isa.c optional sc
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isa/vga_isa.c optional vga
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@ -236,6 +236,7 @@ dev/tpm/tpm.c optional tpm
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dev/tpm/tpm_acpi.c optional tpm acpi
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dev/tpm/tpm_isa.c optional tpm isa
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dev/uart/uart_cpu_i386.c optional uart
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dev/viawd/viawd.c optional viawd
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dev/acpica/acpi_if.m standard
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dev/acpi_support/acpi_wmi_if.m standard
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dev/wpi/if_wpi.c optional wpi
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286
sys/dev/viawd/viawd.c
Normal file
286
sys/dev/viawd/viawd.c
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@ -0,0 +1,286 @@
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/*-
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* Copyright (c) 2011 Fabien Thomas <fthomas@FreeBSD.org>
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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. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <machine/resource.h>
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#include <sys/watchdog.h>
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#include <isa/isavar.h>
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#include <dev/pci/pcivar.h>
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#include "viawd.h"
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#define viawd_read_wd_4(sc, off) \
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bus_space_read_4((sc)->wd_bst, (sc)->wd_bsh, (off))
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#define viawd_write_wd_4(sc, off, val) \
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bus_space_write_4((sc)->wd_bst, (sc)->wd_bsh, (off), (val))
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static struct viawd_device viawd_devices[] = {
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{ DEVICEID_VT8251, "VIA VT8251 watchdog timer" },
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{ DEVICEID_CX700, "VIA CX700 watchdog timer" },
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{ DEVICEID_VX800, "VIA VX800 watchdog timer" },
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{ DEVICEID_VX855, "VIA VX855 watchdog timer" },
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{ DEVICEID_VX900, "VIA VX900 watchdog timer" },
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{ 0, NULL },
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};
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static devclass_t viawd_devclass;
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static device_t
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viawd_find(struct viawd_device **id_p)
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{
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struct viawd_device *id;
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device_t sb_dev = NULL;
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/* Look for a supported VIA south bridge. */
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for (id = viawd_devices; id->desc != NULL; ++id)
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if ((sb_dev = pci_find_device(VENDORID_VIA, id->device)) != NULL)
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break;
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if (sb_dev == NULL)
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return (NULL);
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if (id_p != NULL)
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*id_p = id;
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return (sb_dev);
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}
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static void
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viawd_tmr_state(struct viawd_softc *sc, int enable)
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{
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uint32_t reg;
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reg = viawd_read_wd_4(sc, VIAWD_MEM_CTRL);
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if (enable)
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reg |= VIAWD_MEM_CTRL_TRIGGER | VIAWD_MEM_CTRL_ENABLE;
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else
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reg &= ~VIAWD_MEM_CTRL_ENABLE;
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viawd_write_wd_4(sc, VIAWD_MEM_CTRL, reg);
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}
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static void
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viawd_tmr_set(struct viawd_softc *sc, unsigned int timeout)
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{
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/* Keep value in range. */
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if (timeout < VIAWD_MEM_COUNT_MIN)
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timeout = VIAWD_MEM_COUNT_MIN;
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else if (timeout > VIAWD_MEM_COUNT_MAX)
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timeout = VIAWD_MEM_COUNT_MAX;
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viawd_write_wd_4(sc, VIAWD_MEM_COUNT, timeout);
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sc->timeout = timeout;
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}
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/*
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* Watchdog event handler - called by the framework to enable or disable
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* the watchdog or change the initial timeout value.
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*/
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static void
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viawd_event(void *arg, unsigned int cmd, int *error)
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{
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struct viawd_softc *sc = arg;
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unsigned int timeout;
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/* Convert from power-of-two-ns to second. */
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cmd &= WD_INTERVAL;
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timeout = ((uint64_t)1 << cmd) / 1000000000;
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if (cmd) {
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if (timeout != sc->timeout)
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viawd_tmr_set(sc, timeout);
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viawd_tmr_state(sc, 1);
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*error = 0;
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} else
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viawd_tmr_state(sc, 0);
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}
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static void
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viawd_identify(driver_t *driver, device_t parent)
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{
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device_t dev;
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device_t sb_dev;
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struct viawd_device *id_p;
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sb_dev = viawd_find(&id_p);
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if (sb_dev == NULL)
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return;
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/* Good, add child to bus. */
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if ((dev = device_find_child(parent, driver->name, 0)) == NULL)
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dev = BUS_ADD_CHILD(parent, 0, driver->name, 0);
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if (dev == NULL)
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return;
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device_set_desc_copy(dev, id_p->desc);
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}
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static int
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viawd_probe(device_t dev)
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{
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/* Do not claim some ISA PnP device by accident. */
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if (isa_get_logicalid(dev) != 0)
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return (ENXIO);
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return (0);
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}
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static int
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viawd_attach(device_t dev)
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{
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device_t sb_dev;
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struct viawd_softc *sc;
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struct viawd_device *id_p;
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uint32_t pmbase, reg;
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sc = device_get_softc(dev);
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sc->dev = dev;
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sb_dev = viawd_find(&id_p);
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if (sb_dev == NULL) {
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device_printf(dev, "Can not find watchdog device.\n");
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goto fail;
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}
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sc->sb_dev = sb_dev;
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/* Get watchdog memory base. */
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pmbase = pci_read_config(sb_dev, VIAWD_CONFIG_BASE, 4);
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if (pmbase == 0) {
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device_printf(dev,
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"Watchdog disabled in BIOS or hardware\n");
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goto fail;
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}
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/* Allocate I/O register space. */
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sc->wd_rid = 0;
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sc->wd_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &sc->wd_rid,
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pmbase, pmbase + VIAWD_MEM_LEN - 1, VIAWD_MEM_LEN,
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RF_ACTIVE | RF_SHAREABLE);
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if (sc->wd_res == NULL) {
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device_printf(dev, "Unable to map watchdog memory\n");
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goto fail;
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}
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sc->wd_bst = rman_get_bustag(sc->wd_res);
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sc->wd_bsh = rman_get_bushandle(sc->wd_res);
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/* Check if watchdog fired last boot. */
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reg = viawd_read_wd_4(sc, VIAWD_MEM_CTRL);
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if (reg & VIAWD_MEM_CTRL_FIRED) {
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device_printf(dev,
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"ERROR: watchdog rebooted the system\n");
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/* Reset bit state. */
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viawd_write_wd_4(sc, VIAWD_MEM_CTRL, reg);
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}
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/* Register the watchdog event handler. */
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sc->ev_tag = EVENTHANDLER_REGISTER(watchdog_list, viawd_event, sc, 0);
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return (0);
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fail:
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if (sc->wd_res != NULL)
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bus_release_resource(dev, SYS_RES_MEMORY,
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sc->wd_rid, sc->wd_res);
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return (ENXIO);
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}
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static int
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viawd_detach(device_t dev)
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{
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struct viawd_softc *sc;
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uint32_t reg;
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sc = device_get_softc(dev);
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/* Deregister event handler. */
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if (sc->ev_tag != NULL)
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EVENTHANDLER_DEREGISTER(watchdog_list, sc->ev_tag);
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sc->ev_tag = NULL;
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/*
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* Do not stop the watchdog on shutdown if active but bump the
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* timer to avoid spurious reset.
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*/
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reg = viawd_read_wd_4(sc, VIAWD_MEM_CTRL);
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if (reg & VIAWD_MEM_CTRL_ENABLE) {
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viawd_tmr_set(sc, VIAWD_TIMEOUT_SHUTDOWN);
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viawd_tmr_state(sc, 1);
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device_printf(dev,
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"Keeping watchog alive during shutdown for %d seconds\n",
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VIAWD_TIMEOUT_SHUTDOWN);
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}
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if (sc->wd_res != NULL)
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bus_release_resource(sc->dev, SYS_RES_MEMORY,
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sc->wd_rid, sc->wd_res);
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return (0);
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}
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static device_method_t viawd_methods[] = {
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DEVMETHOD(device_identify, viawd_identify),
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DEVMETHOD(device_probe, viawd_probe),
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DEVMETHOD(device_attach, viawd_attach),
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DEVMETHOD(device_detach, viawd_detach),
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DEVMETHOD(device_shutdown, viawd_detach),
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{0,0}
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};
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static driver_t viawd_driver = {
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"viawd",
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viawd_methods,
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sizeof(struct viawd_softc),
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};
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static int
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viawd_modevent(module_t mode, int type, void *data)
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{
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int error = 0;
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switch (type) {
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case MOD_LOAD:
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printf("viawd module loaded\n");
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break;
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case MOD_UNLOAD:
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printf("viawd module unloaded\n");
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break;
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case MOD_SHUTDOWN:
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printf("viawd module shutting down\n");
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break;
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}
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return (error);
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}
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DRIVER_MODULE(viawd, isa, viawd_driver, viawd_devclass, viawd_modevent, NULL);
|
75
sys/dev/viawd/viawd.h
Normal file
75
sys/dev/viawd/viawd.h
Normal file
@ -0,0 +1,75 @@
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/*-
|
||||
* Copyright (c) 2011 Fabien Thomas <fthomas@FreeBSD.org>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
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|
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#ifndef _VIAWD_H_
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#define _VIAWD_H_
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struct viawd_device {
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uint16_t device;
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char *desc;
|
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};
|
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|
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struct viawd_softc {
|
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device_t dev;
|
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device_t sb_dev;
|
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|
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int wd_rid;
|
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struct resource *wd_res;
|
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bus_space_tag_t wd_bst;
|
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bus_space_handle_t wd_bsh;
|
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|
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eventhandler_tag ev_tag;
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unsigned int timeout;
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};
|
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#define VENDORID_VIA 0x1106
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#define DEVICEID_VT8251 0x3287
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#define DEVICEID_CX700 0x8324
|
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#define DEVICEID_VX800 0x8353
|
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#define DEVICEID_VX855 0x8409
|
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#define DEVICEID_VX900 0x8410
|
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|
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#define VIAWD_CONFIG_BASE 0xE8
|
||||
|
||||
#define VIAWD_MEM_LEN 8
|
||||
|
||||
#define VIAWD_MEM_CTRL 0x00
|
||||
#define VIAWD_MEM_CTRL_TRIGGER 0x000000080
|
||||
#define VIAWD_MEM_CTRL_DISABLE 0x000000008
|
||||
#define VIAWD_MEM_CTRL_POWEROFF 0x000000004
|
||||
#define VIAWD_MEM_CTRL_FIRED 0x000000002
|
||||
#define VIAWD_MEM_CTRL_ENABLE 0x000000001
|
||||
|
||||
#define VIAWD_MEM_COUNT 0x04
|
||||
|
||||
#define VIAWD_MEM_COUNT_MIN 1
|
||||
#define VIAWD_MEM_COUNT_MAX 1023
|
||||
|
||||
#define VIAWD_TIMEOUT_SHUTDOWN (5 * 60)
|
||||
|
||||
#endif
|
@ -831,6 +831,7 @@ hint.pcf.0.irq="5"
|
||||
#
|
||||
device ichwd
|
||||
device amdsbwd
|
||||
device viawd
|
||||
|
||||
#
|
||||
# Temperature sensors:
|
||||
|
@ -318,6 +318,7 @@ SUBDIR= ${_3dfx} \
|
||||
${_vesa} \
|
||||
${_virtio} \
|
||||
vge \
|
||||
${_viawd} \
|
||||
vkbd \
|
||||
${_vpo} \
|
||||
vr \
|
||||
@ -528,6 +529,7 @@ _nve= nve
|
||||
_nvram= nvram
|
||||
_nxge= nxge
|
||||
_tpm= tpm
|
||||
_viawd= viawd
|
||||
_wpi= wpi
|
||||
_wpifw= wpifw
|
||||
.if ${MK_CRYPT} != "no" || defined(ALL_MODULES)
|
||||
@ -637,6 +639,7 @@ _sppp= sppp
|
||||
_tpm= tpm
|
||||
_twa= twa
|
||||
_vesa= vesa
|
||||
_viawd= viawd
|
||||
_virtio= virtio
|
||||
_vxge= vxge
|
||||
_x86bios= x86bios
|
||||
|
8
sys/modules/viawd/Makefile
Normal file
8
sys/modules/viawd/Makefile
Normal file
@ -0,0 +1,8 @@
|
||||
# $FreeBSD$
|
||||
|
||||
.PATH: ${.CURDIR}/../../dev/viawd
|
||||
|
||||
KMOD= viawd
|
||||
SRCS= viawd.c device_if.h bus_if.h pci_if.h isa_if.h
|
||||
|
||||
.include <bsd.kmod.mk>
|
Loading…
Reference in New Issue
Block a user