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, 152 insertions, 0 deletions

diff --git a/sys/dev/acpica/acpi_lid.c b/sys/dev/acpica/acpi_lid.c
new file mode 100644
index 0000000..b32cdc6
--- /dev/null
+++ b/sys/dev/acpica/acpi_lid.c
@@ -0,0 +1,152 @@
+/*-
+ * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org>
+ * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
+ * Copyright (c) 2000 Michael Smith <msmith@freebd.org>
+ * 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>
+
+struct acpi_lid_softc {
+    device_t	lid_dev;
+    ACPI_HANDLE	lid_handle;
+    int		lid_status;	/* open or closed */
+};
+
+static int	acpi_lid_probe(device_t dev);
+static int	acpi_lid_attach(device_t dev);
+static void	acpi_lid_notify_status_changed(void *arg);
+static void 	acpi_lid_notify_handler(ACPI_HANDLE h,UINT32 notify, void *context);
+
+static device_method_t acpi_lid_methods[] = {
+    /* Device interface */
+    DEVMETHOD(device_probe,	acpi_lid_probe),
+    DEVMETHOD(device_attach,	acpi_lid_attach),
+
+    {0, 0}
+};
+
+static driver_t acpi_lid_driver = {
+    "acpi_lid",
+    acpi_lid_methods,
+    sizeof(struct acpi_lid_softc),
+};
+
+devclass_t acpi_lid_devclass;
+DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0);
+
+static int
+acpi_lid_probe(device_t dev)
+{
+    if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) && 
+	acpi_MatchHid(dev, "PNP0C0D")) {
+	device_set_desc(dev, "Control Method Lid Switch");
+	return(0);
+    }
+    return(ENXIO);
+}
+
+static int
+acpi_lid_attach(device_t dev)
+{
+    struct acpi_lid_softc	*sc;
+
+    sc = device_get_softc(dev);
+    sc->lid_dev = dev;
+    sc->lid_handle = acpi_get_handle(dev);
+
+    /*
+     * Install notification handler
+     */
+    AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY, acpi_lid_notify_handler, sc);
+    return(0);
+}
+
+static void
+acpi_lid_notify_status_changed(void *arg)
+{
+    struct acpi_lid_softc	*sc;
+    struct acpi_softc		*acpi_sc;
+    ACPI_BUFFER			Buffer;
+    ACPI_OBJECT			Object;
+
+    sc = (struct acpi_lid_softc *)arg;
+
+    /*
+     * Evaluate _LID and check the return value
+     *	Zero:		The lid is closed
+     *	Non-zero:	The lid is open
+     */
+    Buffer.Length = sizeof(Object);
+    Buffer.Pointer = &Object;
+    if (AcpiEvaluateObject(sc->lid_handle, "_LID", NULL, &Buffer) != AE_OK)
+	return;
+    if (Object.Type != ACPI_TYPE_NUMBER) 
+	return;
+
+    /*
+     * Update lid status
+    */
+    sc->lid_status = Object.Number.Value;
+    device_printf(sc->lid_dev, "Lid %s\n", sc->lid_status ? "opened" : "closed");
+
+    acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
+    if (acpi_sc == NULL) {
+        return;
+    }
+
+    if (sc->lid_status == 0) {
+	EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx);
+    } else {
+	EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx);
+    }
+}
+
+/* XXX maybe not here */
+#define	ACPI_NOTIFY_STATUS_CHANGED	0x80
+
+static void 
+acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
+{
+    struct acpi_lid_softc	*sc = (struct acpi_lid_softc *)context;
+
+    switch (notify) {
+    case ACPI_NOTIFY_STATUS_CHANGED:
+	AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_lid_notify_status_changed, sc);
+	break;
+    default:
+	return;		/* unknown notification value */
+    }
+}
+