Initial FreeBSD OSPM (operating system power management) modules for

ACPICA.  Most of these are still works in progress.  Support exists for:

 - Fixed feature and control method power, lid and sleep buttons.
 - Detection of ISA PnP devices using ACPI namespace.
 - Detection of PCI root busses using ACPI namespace.
 - CPU throttling and sleep states (incomplete)
 - Thermal monitoring and cooling control (incomplete)
 - Interface to platform embedded controllers (mostly complete)
 - ACPI timer (incomplete)
 - Simple userland control of sleep states.
 - Shutdown and poweroff.

1 files changed, 117 insertions, 0 deletions

diff --git a/sys/dev/acpica/acpi_timer.c b/sys/dev/acpica/acpi_timer.c
new file mode 100644
index 0000000..e232f8b
--- /dev/null
+++ b/sys/dev/acpica/acpi_timer.c
@@ -0,0 +1,117 @@
+/*-
+ * Copyright (c) 2000 Michael Smith
+ * Copyright (c) 2000 BSDi
+ * 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.
+ *
+ *	$FreeBSD$
+ */
+
+#include "opt_acpi.h"
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/bus.h>
+
+#include "acpi.h"
+
+#include <dev/acpica/acpivar.h>
+
+#define ACPITIMER_MAGIC 0x524d4954	/* "TIMR" */
+
+struct acpi_timer_softc {
+    device_t	tm_dev;
+};
+
+static void	acpi_timer_identify(driver_t *driver, device_t parent);
+static int	acpi_timer_probe(device_t dev);
+static int	acpi_timer_attach(device_t dev);
+
+static device_method_t acpi_timer_methods[] = {
+    /* Device interface */
+    DEVMETHOD(device_identify,	acpi_timer_identify),
+    DEVMETHOD(device_probe,	acpi_timer_probe),
+    DEVMETHOD(device_attach,	acpi_timer_attach),
+
+    {0, 0}
+};
+
+static driver_t acpi_timer_driver = {
+    "acpi_timer",
+    acpi_timer_methods,
+    sizeof(struct acpi_timer_softc),
+};
+
+devclass_t acpi_timer_devclass;
+DRIVER_MODULE(acpi_timer, acpi, acpi_timer_driver, acpi_timer_devclass, 0, 0);
+
+static void
+acpi_timer_identify(driver_t *driver, device_t parent)
+{
+    static FIXED_ACPI_DESCRIPTION_TABLE	facp;
+    ACPI_BUFFER				buf;
+    ACPI_STATUS				status;
+    device_t				dev;
+    char				desc[40];
+
+    buf.Pointer = &facp;
+    buf.Length = sizeof(facp);
+    if ((status = AcpiGetTable(ACPI_TABLE_FACP, 1, &buf)) != AE_OK) {
+	device_printf(parent, "can't locate FACP - %s\n", acpi_strerror(status));
+	return;
+    }
+    if (buf.Length != sizeof(facp)) {
+	device_printf(parent, "invalid FACP\n");
+	return;
+    }
+
+    if ((dev = BUS_ADD_CHILD(parent, 0, "acpi_timer", 0)) == NULL) {
+	device_printf(parent, "could not add acpi_timer0\n");
+	return;
+    }
+    if (acpi_set_magic(dev, ACPITIMER_MAGIC)) {
+	device_printf(dev, "could not set magic\n");
+	return;
+    }
+
+    sprintf(desc, "%d-bit timer at 3.579545MHz", facp.TmrValExt ? 32 : 24);
+    device_set_desc_copy(dev, desc);
+}
+
+static int
+acpi_timer_probe(device_t dev)
+{
+    if (acpi_get_magic(dev) == ACPITIMER_MAGIC)
+	return(0);
+    return(ENXIO);
+}
+
+static int
+acpi_timer_attach(device_t dev)
+{
+    struct acpi_timer_softc		*sc;
+
+    sc = device_get_softc(dev);
+    sc->tm_dev = dev;
+
+    return(0);
+}