svn commit: r199969 - in head: share/man/man4 sys/amd64/conf
sys/conf sys/dev/amdsbwd sys/i386/conf sys/modules
sys/modules/amdsbwd
Andriy Gapon
avg at FreeBSD.org
Mon Nov 30 11:44:04 UTC 2009
Author: avg
Date: Mon Nov 30 11:44:03 2009
New Revision: 199969
URL: http://svn.freebsd.org/changeset/base/199969
Log:
amdsbwd: new driver for AMD SB600/SB7xx watchdog timer
The hardware is compliant with WDRT specification, so I originally
considered including generic WDRT watchdog support, but decided
against it, because I couldn't find anyone to the code for me.
WDRT seems to be not very popular.
Besides, generic WDRT porbably requires a slightly different driver
approach.
Reviewed by: des, gavin, rpaulo
MFC after: 3 weeks
Added:
head/share/man/man4/amdsbwd.4 (contents, props changed)
head/sys/dev/amdsbwd/
head/sys/dev/amdsbwd/amdsbwd.c (contents, props changed)
head/sys/modules/amdsbwd/
head/sys/modules/amdsbwd/Makefile (contents, props changed)
Modified:
head/share/man/man4/Makefile
head/sys/amd64/conf/NOTES
head/sys/conf/files.amd64
head/sys/conf/files.i386
head/sys/i386/conf/NOTES
head/sys/modules/Makefile
Modified: head/share/man/man4/Makefile
==============================================================================
--- head/share/man/man4/Makefile Mon Nov 30 11:11:08 2009 (r199968)
+++ head/share/man/man4/Makefile Mon Nov 30 11:44:03 2009 (r199969)
@@ -31,6 +31,7 @@ MAN= aac.4 \
ale.4 \
altq.4 \
amd.4 \
+ ${_amdsbwd.4} \
${_amdsmb.4} \
${_amdtemp.4} \
amr.4 \
@@ -610,6 +611,7 @@ _acpi_panasonic.4=acpi_panasonic.4
_acpi_sony.4= acpi_sony.4
_acpi_toshiba.4=acpi_toshiba.4
_acpi_wmi.4= acpi_wmi.4
+_amdsbwd.4= amdsbwd.4
_amdsmb.4= amdsmb.4
_amdtemp.4= amdtemp.4
_asmc.4= asmc.4
Added: head/share/man/man4/amdsbwd.4
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/share/man/man4/amdsbwd.4 Mon Nov 30 11:44:03 2009 (r199969)
@@ -0,0 +1,72 @@
+.\"-
+.\" Copyright (c) 2009 Andriy Gapon
+.\" 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.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd November 30, 2009
+.Dt AMDSBWD 4
+.Os
+.Sh NAME
+.Nm amdsbwd
+.Nd device driver for the AMD SB600/SB700/SB710/SB750 watchdog timer
+.Sh SYNOPSIS
+To compile this driver into the kernel,
+place the following line in your
+kernel configuration file:
+.Bd -ragged -offset indent
+.Cd "device amdsbwd"
+.Ed
+.Pp
+Alternatively, to load the driver as a
+module at boot time, place the following line in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+amdsbwd_load="YES"
+.Ed
+.Sh DESCRIPTION
+The
+.Nm
+driver provides
+.Xr watchdog 4
+support for the watchdog timers present on
+AMD SB600 and SB7xx south bridge chips.
+.Sh SEE ALSO
+.Xr watchdog 4 ,
+.Xr watchdog 8 ,
+.Xr watchdogd 8 ,
+.Xr watchdog 9
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Fx 9.0 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An Andiry Gapon Aq avg at FreeBSD.org .
+This manual page was written by
+.An Andiry Gapon Aq avg at FreeBSD.org .
Modified: head/sys/amd64/conf/NOTES
==============================================================================
--- head/sys/amd64/conf/NOTES Mon Nov 30 11:11:08 2009 (r199968)
+++ head/sys/amd64/conf/NOTES Mon Nov 30 11:44:03 2009 (r199969)
@@ -399,8 +399,10 @@ device asmc
# Hardware watchdog timers:
#
# ichwd: Intel ICH watchdog timer
+# amdsbwd: AMD SB7xx watchdog timer
#
device ichwd
+device amdsbwd
#
# Temperature sensors:
Modified: head/sys/conf/files.amd64
==============================================================================
--- head/sys/conf/files.amd64 Mon Nov 30 11:11:08 2009 (r199968)
+++ head/sys/conf/files.amd64 Mon Nov 30 11:44:03 2009 (r199969)
@@ -151,6 +151,7 @@ dev/agp/agp_amd64.c optional agp
dev/agp/agp_i810.c optional agp
dev/agp/agp_intel.c optional agp
dev/agp/agp_via.c optional agp
+dev/amdsbwd/amdsbwd.c optional amdsbwd
dev/amdtemp/amdtemp.c optional amdtemp
dev/arcmsr/arcmsr.c optional arcmsr pci
dev/asmc/asmc.c optional asmc isa
Modified: head/sys/conf/files.i386
==============================================================================
--- head/sys/conf/files.i386 Mon Nov 30 11:11:08 2009 (r199968)
+++ head/sys/conf/files.i386 Mon Nov 30 11:44:03 2009 (r199969)
@@ -127,6 +127,7 @@ dev/agp/agp_nvidia.c optional agp
dev/agp/agp_sis.c optional agp
dev/agp/agp_via.c optional agp
dev/aic/aic_isa.c optional aic isa
+dev/amdsbwd/amdsbwd.c optional amdsbwd
dev/amdtemp/amdtemp.c optional amdtemp
dev/arcmsr/arcmsr.c optional arcmsr pci
dev/asmc/asmc.c optional asmc isa
Added: head/sys/dev/amdsbwd/amdsbwd.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/amdsbwd/amdsbwd.c Mon Nov 30 11:44:03 2009 (r199969)
@@ -0,0 +1,431 @@
+/*-
+ * Copyright (c) 2009 Andriy Gapon <avg at 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.
+ */
+
+/*
+ * This is a driver for watchdog timer present in AMD SB600/SB7xx
+ * south bridges and other watchdog timers advertised via WDRT ACPI table.
+ * Please see the following specifications for the descriptions of the
+ * registers and flags:
+ * - AMD SB600 Register Reference Guide, Public Version, Rev. 3.03 (SB600 RRG)
+ * http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/46155_sb600_rrg_pub_3.03.pdf
+ * - AMD SB700/710/750 Register Reference Guide (RRG)
+ * http://developer.amd.com/assets/43009_sb7xx_rrg_pub_1.00.pdf
+ * - AMD SB700/710/750 Register Programming Requirements (RPR)
+ * http://developer.amd.com/assets/42413_sb7xx_rpr_pub_1.00.pdf
+ * Please see the following for Watchdog Resource Table specification:
+ * - Watchdog Timer Hardware Requirements for Windows Server 2003 (WDRT)
+ * http://www.microsoft.com/whdc/system/sysinternals/watchdog.mspx
+ * AMD SB600/SB7xx watchdog hardware seems to conform to the above,
+ * but my system doesn't provide the table.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/systm.h>
+#include <sys/sysctl.h>
+#include <sys/bus.h>
+#include <machine/bus.h>
+#include <sys/rman.h>
+#include <machine/resource.h>
+#include <sys/watchdog.h>
+
+#include <dev/pci/pcivar.h>
+#include <isa/isavar.h>
+
+/* RRG 2.3.3.1.1, page 161. */
+#define AMDSB_PMIO_INDEX 0xcd6
+#define AMDSB_PMIO_DATA (PMIO_INDEX + 1)
+#define AMDSB_PMIO_WIDTH 2
+/* RRG 2.3.3.2, page 181. */
+#define AMDSB_PM_RESET_STATUS0 0x44
+#define AMDSB_PM_RESET_STATUS1 0x45
+#define AMDSB_WD_RST_STS 0x02
+/* RRG 2.3.3.2, page 188; RPR 2.36, page 30. */
+#define AMDSB_PM_WDT_CTRL 0x69
+#define AMDSB_WDT_DISABLE 0x01
+#define AMDSB_WDT_RES_MASK (0x02 | 0x04)
+#define AMDSB_WDT_RES_32US 0x00
+#define AMDSB_WDT_RES_10MS 0x02
+#define AMDSB_WDT_RES_100MS 0x04
+#define AMDSB_WDT_RES_1S 0x06
+#define AMDSB_PM_WDT_BASE_LSB 0x6c
+#define AMDSB_PM_WDT_BASE_MSB 0x6f
+/* RRG 2.3.4, page 223, WDRT. */
+#define AMDSB_WD_CTRL 0x00
+#define AMDSB_WD_RUN 0x01
+#define AMDSB_WD_FIRED 0x02
+#define AMDSB_WD_SHUTDOWN 0x04
+#define AMDSB_WD_DISABLE 0x08
+#define AMDSB_WD_RESERVED 0x70
+#define AMDSB_WD_RELOAD 0x80
+#define AMDSB_WD_COUNT 0x04
+#define AMDSB_WD_COUNT_MASK 0xffff
+#define AMDSB_WDIO_REG_WIDTH 4
+/* WDRT */
+#define MAXCOUNT_MIN_VALUE 511
+/* RRG 2.3.1.1, page 122; SB600 RRG 2.3.1.1, page 97. */
+#define AMDSB7xx_SMBUS_DEVID 0x43851002
+
+#define amdsbwd_verbose_printf(dev, ...) \
+ do { \
+ if (bootverbose) \
+ device_printf(dev, __VA_ARGS__);\
+ } while (0)
+
+struct amdsbwd_softc {
+ device_t dev;
+ eventhandler_tag ev_tag;
+ struct resource *res_ctrl;
+ struct resource *res_count;
+ int rid_ctrl;
+ int rid_count;
+ int ms_per_tick;
+ int max_ticks;
+ int active;
+ unsigned int timeout;
+};
+
+static void amdsbwd_identify(driver_t *driver, device_t parent);
+static int amdsbwd_probe(device_t dev);
+static int amdsbwd_attach(device_t dev);
+static int amdsbwd_detach(device_t dev);
+
+static device_method_t amdsbwd_methods[] = {
+ DEVMETHOD(device_identify, amdsbwd_identify),
+ DEVMETHOD(device_probe, amdsbwd_probe),
+ DEVMETHOD(device_attach, amdsbwd_attach),
+ DEVMETHOD(device_detach, amdsbwd_detach),
+#if 0
+ DEVMETHOD(device_shutdown, amdsbwd_detach),
+#endif
+ {0, 0}
+};
+
+static devclass_t amdsbwd_devclass;
+static driver_t amdsbwd_driver = {
+ "amdsbwd",
+ amdsbwd_methods,
+ sizeof(struct amdsbwd_softc)
+};
+
+DRIVER_MODULE(amdsbwd, isa, amdsbwd_driver, amdsbwd_devclass, NULL, NULL);
+
+
+static uint8_t
+pmio_read(struct resource *res, uint8_t reg)
+{
+ bus_write_1(res, 0, reg); /* Index */
+ return (bus_read_1(res, 1)); /* Data */
+}
+
+static void
+pmio_write(struct resource *res, uint8_t reg, uint8_t val)
+{
+ bus_write_1(res, 0, reg); /* Index */
+ bus_write_1(res, 1, val); /* Data */
+}
+
+static uint32_t
+wdctrl_read(struct amdsbwd_softc *sc)
+{
+ return (bus_read_4(sc->res_ctrl, 0));
+}
+
+static void
+wdctrl_write(struct amdsbwd_softc *sc, uint32_t val)
+{
+ bus_write_4(sc->res_ctrl, 0, val);
+}
+
+static __unused uint32_t
+wdcount_read(struct amdsbwd_softc *sc)
+{
+ return (bus_read_4(sc->res_count, 0));
+}
+
+static void
+wdcount_write(struct amdsbwd_softc *sc, uint32_t val)
+{
+ bus_write_4(sc->res_count, 0, val);
+}
+
+static void
+amdsbwd_tmr_enable(struct amdsbwd_softc *sc)
+{
+ uint32_t val;
+
+ val = wdctrl_read(sc);
+ val |= AMDSB_WD_RUN;
+ wdctrl_write(sc, val);
+ sc->active = 1;
+ amdsbwd_verbose_printf(sc->dev, "timer enabled\n");
+}
+
+static void
+amdsbwd_tmr_disable(struct amdsbwd_softc *sc)
+{
+ uint32_t val;
+
+ val = wdctrl_read(sc);
+ val &= ~AMDSB_WD_RUN;
+ wdctrl_write(sc, val);
+ sc->active = 0;
+ amdsbwd_verbose_printf(sc->dev, "timer disabled\n");
+}
+
+static void
+amdsbwd_tmr_reload(struct amdsbwd_softc *sc)
+{
+ uint32_t val;
+
+ val = wdctrl_read(sc);
+ val |= AMDSB_WD_RELOAD;
+ wdctrl_write(sc, val);
+}
+
+static void
+amdsbwd_tmr_set(struct amdsbwd_softc *sc, uint16_t timeout)
+{
+
+ timeout &= AMDSB_WD_COUNT_MASK;
+ wdcount_write(sc, timeout);
+ sc->timeout = timeout;
+ amdsbwd_verbose_printf(sc->dev, "timeout set to %u ticks\n", timeout);
+}
+
+static void
+amdsbwd_event(void *arg, unsigned int cmd, int *error)
+{
+ struct amdsbwd_softc *sc = arg;
+ unsigned int timeout;
+
+ /* convert from power-of-two-ns to WDT ticks */
+ cmd &= WD_INTERVAL;
+ if (cmd < WD_TO_1SEC)
+ cmd = 0;
+ timeout = ((uint64_t)1 << (cmd - WD_TO_1MS)) / sc->ms_per_tick;
+ if (timeout > sc->max_ticks)
+ timeout = sc->max_ticks;
+ if (cmd) {
+ if (timeout != sc->timeout) {
+ amdsbwd_tmr_set(sc, timeout);
+ if (!sc->active)
+ amdsbwd_tmr_enable(sc);
+ }
+ amdsbwd_tmr_reload(sc);
+ *error = 0;
+ } else {
+ if (sc->active)
+ amdsbwd_tmr_disable(sc);
+ }
+}
+
+static void
+amdsbwd_identify(driver_t *driver, device_t parent)
+{
+ device_t child;
+ device_t smb_dev;
+
+ if (resource_disabled("amdsbwd", 0))
+ return;
+ if (device_find_child(parent, "amdsbwd", -1) != NULL)
+ return;
+
+ /*
+ * Try to identify SB600/SB7xx by PCI Device ID of SMBus device
+ * that should be present at bus 0, device 20, function 0.
+ */
+ smb_dev = pci_find_bsf(0, 20, 0);
+ if (smb_dev == NULL)
+ return;
+ if (pci_get_devid(smb_dev) != AMDSB7xx_SMBUS_DEVID)
+ return;
+
+ child = BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "amdsbwd", -1);
+ if (child == NULL)
+ device_printf(parent, "add amdsbwd child failed\n");
+}
+
+static int
+amdsbwd_probe(device_t dev)
+{
+ struct resource *res;
+ uint32_t addr;
+ uint32_t val;
+ int rid;
+ int rc;
+ int i;
+
+ /* Do not claim some ISA PnP device by accident. */
+ if (isa_get_logicalid(dev) != 0)
+ return (ENXIO);
+
+ rc = bus_set_resource(dev, SYS_RES_IOPORT, 0, AMDSB_PMIO_INDEX,
+ AMDSB_PMIO_WIDTH);
+ if (rc != 0) {
+ device_printf(dev, "bus_set_resource for IO failed\n");
+ return (ENXIO);
+ }
+ rid = 0;
+ res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0ul, ~0ul,
+ AMDSB_PMIO_WIDTH, RF_ACTIVE | RF_SHAREABLE);
+ if (res == NULL) {
+ device_printf(dev, "bus_alloc_resource for IO failed\n");
+ return (ENXIO);
+ }
+
+ /* Report cause of previous reset for user's convenience. */
+ val = pmio_read(res, AMDSB_PM_RESET_STATUS0);
+ if (val != 0)
+ amdsbwd_verbose_printf(dev, "ResetStatus0 = %#04x\n", val);
+ val = pmio_read(res, AMDSB_PM_RESET_STATUS1);
+ if (val != 0)
+ amdsbwd_verbose_printf(dev, "ResetStatus1 = %#04x\n", val);
+ if ((val & AMDSB_WD_RST_STS) != 0)
+ device_printf(dev, "Previous Reset was caused by Watchdog\n");
+
+ /* Find base address of memory mapped WDT registers. */
+ for (addr = 0, i = 0; i < 4; i++) {
+ addr <<= 8;
+ addr |= pmio_read(res, AMDSB_PM_WDT_BASE_MSB - i);
+ }
+ amdsbwd_verbose_printf(dev, "memory base address = %#010x\n", addr);
+ rc = bus_set_resource(dev, SYS_RES_MEMORY, 0, addr + AMDSB_WD_CTRL,
+ AMDSB_WDIO_REG_WIDTH);
+ if (rc != 0) {
+ device_printf(dev, "bus_set_resource for control failed\n");
+ return (ENXIO);
+ }
+ rc = bus_set_resource(dev, SYS_RES_MEMORY, 1, addr + AMDSB_WD_COUNT,
+ AMDSB_WDIO_REG_WIDTH);
+ if (rc != 0) {
+ device_printf(dev, "bus_set_resource for count failed\n");
+ return (ENXIO);
+ }
+
+ /* Set watchdog timer tick to 10ms. */
+ val = pmio_read(res, AMDSB_PM_WDT_CTRL);
+ val &= ~AMDSB_WDT_RES_MASK;
+ val |= AMDSB_WDT_RES_10MS;
+ pmio_write(res, AMDSB_PM_WDT_CTRL, val);
+
+ /* Enable watchdog device (in stopped state). */
+ val = pmio_read(res, AMDSB_PM_WDT_CTRL);
+ val &= ~AMDSB_WDT_DISABLE;
+ pmio_write(res, AMDSB_PM_WDT_CTRL, val);
+
+ /*
+ * XXX TODO: Ensure that watchdog decode is enabled
+ * (register 0x41, bit 3).
+ */
+ bus_release_resource(dev, SYS_RES_IOPORT, rid, res);
+ bus_delete_resource(dev, SYS_RES_IOPORT, rid);
+
+ device_set_desc(dev, "AMD SB600/SB7xx Watchdog Timer");
+ return (0);
+}
+
+static int
+amdsbwd_attach_sb(device_t dev, struct amdsbwd_softc *sc)
+{
+ sc->max_ticks = UINT16_MAX;
+ sc->ms_per_tick = 10;
+ sc->rid_ctrl = 0;
+ sc->rid_count = 1;
+
+ sc->res_ctrl = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
+ &sc->rid_ctrl, RF_ACTIVE);
+ if (sc->res_ctrl == NULL) {
+ device_printf(dev, "bus_alloc_resource for ctrl failed\n");
+ return (ENXIO);
+ }
+ sc->res_count = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
+ &sc->rid_count, RF_ACTIVE);
+ if (sc->res_count == NULL) {
+ device_printf(dev, "bus_alloc_resource for count failed\n");
+ return (ENXIO);
+ }
+ return (0);
+}
+
+static int
+amdsbwd_attach(device_t dev)
+{
+ struct amdsbwd_softc *sc;
+ int rc;
+
+ sc = device_get_softc(dev);
+ sc->dev = dev;
+
+ rc = amdsbwd_attach_sb(dev, sc);
+ if (rc != 0)
+ goto fail;
+
+ /* Setup initial state of Watchdog Control. */
+ wdctrl_write(sc, AMDSB_WD_FIRED);
+
+ if (wdctrl_read(sc) & AMDSB_WD_DISABLE) {
+ device_printf(dev, "watchdog hardware is disabled\n");
+ goto fail;
+ }
+
+ sc->ev_tag = EVENTHANDLER_REGISTER(watchdog_list, amdsbwd_event, sc,
+ EVENTHANDLER_PRI_ANY);
+
+ return (0);
+
+fail:
+ amdsbwd_detach(dev);
+ return (ENXIO);
+}
+
+static int
+amdsbwd_detach(device_t dev)
+{
+ struct amdsbwd_softc *sc;
+
+ sc = device_get_softc(dev);
+ if (sc->ev_tag != NULL)
+ EVENTHANDLER_DEREGISTER(watchdog_list, sc->ev_tag);
+
+ if (sc->active)
+ amdsbwd_tmr_disable(sc);
+
+ if (sc->res_ctrl != NULL)
+ bus_release_resource(dev, SYS_RES_MEMORY, sc->rid_ctrl,
+ sc->res_ctrl);
+
+ if (sc->res_count != NULL)
+ bus_release_resource(dev, SYS_RES_MEMORY, sc->rid_count,
+ sc->res_count);
+
+ return (0);
+}
+
Modified: head/sys/i386/conf/NOTES
==============================================================================
--- head/sys/i386/conf/NOTES Mon Nov 30 11:11:08 2009 (r199968)
+++ head/sys/i386/conf/NOTES Mon Nov 30 11:44:03 2009 (r199969)
@@ -785,8 +785,10 @@ hint.pcf.0.irq="5"
# Hardware watchdog timers:
#
# ichwd: Intel ICH watchdog timer
+# amdsbwd: AMD SB7xx watchdog timer
#
device ichwd
+device amdsbwd
#
# Temperature sensors:
Modified: head/sys/modules/Makefile
==============================================================================
--- head/sys/modules/Makefile Mon Nov 30 11:11:08 2009 (r199968)
+++ head/sys/modules/Makefile Mon Nov 30 11:44:03 2009 (r199969)
@@ -21,6 +21,7 @@ SUBDIR= ${_3dfx} \
alc \
ale \
${_amd} \
+ ${_amdsbwd} \
${_amdtemp} \
amr \
${_an} \
@@ -416,6 +417,7 @@ _zfs= zfs
_aac= aac
_acpi= acpi
_ahb= ahb
+_amdsbwd= amdsbwd
_amdtemp= amdtemp
_arcmsr= arcmsr
_asmc= asmc
@@ -472,6 +474,7 @@ _aac= aac
_acpi= acpi
_agp= agp
_an= an
+_amdsbwd= amdsbwd
_amdtemp= amdtemp
_arcmsr= arcmsr
_asmc= asmc
Added: head/sys/modules/amdsbwd/Makefile
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/modules/amdsbwd/Makefile Mon Nov 30 11:44:03 2009 (r199969)
@@ -0,0 +1,8 @@
+# $FreeBSD$
+
+.PATH: ${.CURDIR}/../../dev/amdsbwd
+KMOD = amdsbwd
+SRCS = amdsbwd.c
+SRCS += device_if.h bus_if.h pci_if.h isa_if.h
+
+.include <bsd.kmod.mk>
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