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, 236 insertions, 0 deletions

diff --git a/sys/dev/acpica/acpi_pcib_acpi.c b/sys/dev/acpica/acpi_pcib_acpi.c
new file mode 100644
index 0000000..43c2f3d
--- /dev/null
+++ b/sys/dev/acpica/acpi_pcib_acpi.c
@@ -0,0 +1,236 @@
+/*-
+ * 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>
+
+#include <machine/pci_cfgreg.h>
+#include <pci/pcivar.h>
+#include "pcib_if.h"
+
+struct acpi_pcib_softc {
+    device_t		ap_dev;
+    ACPI_HANDLE		ap_handle;
+
+    int			ap_segment;	/* analagous to Alpha 'hose' */
+    int			ap_bus;		/* bios-assigned bus number */
+};
+
+static int		acpi_pcib_probe(device_t bus);
+static int		acpi_pcib_attach(device_t bus);
+static int		acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result);
+static int		acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value);
+static int		acpi_pcib_maxslots(device_t dev);
+static u_int32_t	acpi_pcib_read_config(device_t dev, int bus, int slot, int func, int reg, int bytes);
+static void		acpi_pcib_write_config(device_t dev, int bus, int slot, int func, int reg, 
+					       u_int32_t data, int bytes);
+static int		acpi_pcib_route_interrupt(device_t bus, int device, int pin);
+
+static device_method_t acpi_pcib_methods[] = {
+    /* Device interface */
+    DEVMETHOD(device_probe,		acpi_pcib_probe),
+    DEVMETHOD(device_attach,		acpi_pcib_attach),
+    DEVMETHOD(device_shutdown,		bus_generic_shutdown),
+    DEVMETHOD(device_suspend,		bus_generic_suspend),
+    DEVMETHOD(device_resume,		bus_generic_resume),
+
+    /* Bus interface */
+    DEVMETHOD(bus_print_child,		bus_generic_print_child),
+    DEVMETHOD(bus_read_ivar,		acpi_pcib_read_ivar),
+    DEVMETHOD(bus_write_ivar,		acpi_pcib_write_ivar),
+    DEVMETHOD(bus_alloc_resource,	bus_generic_alloc_resource),
+    DEVMETHOD(bus_release_resource,	bus_generic_release_resource),
+    DEVMETHOD(bus_activate_resource,	bus_generic_activate_resource),
+    DEVMETHOD(bus_deactivate_resource, 	bus_generic_deactivate_resource),
+    DEVMETHOD(bus_setup_intr,		bus_generic_setup_intr),
+    DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
+
+    /* pcib interface */
+    DEVMETHOD(pcib_maxslots,		acpi_pcib_maxslots),
+    DEVMETHOD(pcib_read_config,		acpi_pcib_read_config),
+    DEVMETHOD(pcib_write_config,	acpi_pcib_write_config),
+    DEVMETHOD(pcib_route_interrupt,	acpi_pcib_route_interrupt),
+
+    {0, 0}
+};
+
+static driver_t acpi_pcib_driver = {
+    "acpi_pcib",
+    acpi_pcib_methods,
+    sizeof(struct acpi_pcib_softc),
+};
+
+devclass_t acpi_pcib_devclass;
+DRIVER_MODULE(acpi_pcib, acpi, acpi_pcib_driver, acpi_pcib_devclass, 0, 0);
+
+static int
+acpi_pcib_probe(device_t dev)
+{
+
+    if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) &&
+	acpi_MatchHid(dev, "PNP0A03")) {
+
+	/*
+	 * Set device description 
+	 */
+	device_set_desc(dev, "Host-PCI bridge");
+	return(0);
+    }
+    return(ENXIO);
+}
+
+static int
+acpi_pcib_attach(device_t dev)
+{
+    struct acpi_pcib_softc	*sc;
+    device_t			child;
+    ACPI_STATUS			status;
+
+    sc = device_get_softc(dev);
+    sc->ap_dev = dev;
+    sc->ap_handle = acpi_get_handle(dev);
+
+    /*
+     * Don't attach if we're not really there.
+     *
+     * XXX this isn't entirely correct, since we may be a PCI bus
+     * on a hot-plug docking station, etc.
+     */
+    if (!acpi_DeviceIsPresent(dev))
+	return(ENXIO);
+
+    /*
+     * Get our segment number by evaluating _SEG
+     * It's OK for this to not exist.
+     */
+    if ((status = acpi_EvaluateNumber(sc->ap_handle, "_SEG", &sc->ap_segment)) != AE_OK) {
+	if (status != AE_NOT_FOUND) {
+	    device_printf(dev, "could not evaluate _SEG - %s\n", acpi_strerror(status));
+	    return(ENXIO);
+	}
+	/* if it's not found, assume 0 */
+	sc->ap_segment = 0;
+    }
+
+    /*
+     * Get our base bus number by evaluating _BBN
+     * If this doesn't exist, we assume we're bus number 0.
+     *
+     * XXX note that it may also not exist in the case where we are 
+     *     meant to use a private configuration space mechanism for this bus,
+     *     so we should dig out our resources and check to see if we have
+     *     anything like that.  How do we do this?
+     */
+    if ((status = acpi_EvaluateNumber(sc->ap_handle, "_BBN", &sc->ap_bus)) != AE_OK) {
+	if (status != AE_NOT_FOUND) {
+	    device_printf(dev, "could not evaluate _BBN - %s\n", acpi_strerror(status));
+	    return(ENXIO);
+	}
+	/* if it's not found, assume 0 */
+	sc->ap_bus = 0;
+    }
+
+    /*
+     * XXX we should check here to make sure that this bus number hasn't already
+     *     been attached.  It shouldn't really be an issue.
+     */
+    if ((child = device_add_child(dev, "pci", sc->ap_bus)) == NULL) {
+	device_printf(device_get_parent(dev), "couldn't attach pci bus");
+	return(ENXIO);
+    }
+    /*
+     *  XXX If we have the requisite information, and if we don't think the
+     *      default PCI configuration space handlers can deal with this bus,
+     *      we should attach our own handler.
+     */
+    /* XXX invoke _REG on this for the PCI config space address space? */
+
+    /*
+     * Now go scan the bus.
+     *
+     * XXX is it possible to defer this and count on the nexus getting to it
+     *     reliably after it's finished with ACPI?  Should we really care?
+     */
+    return(bus_generic_attach(dev));
+}
+
+static int
+acpi_pcib_maxslots(device_t dev)
+{
+    return(31);
+}
+
+static int
+acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
+{
+    struct acpi_pcib_softc	*sc = device_get_softc(dev);
+
+    switch (which) {
+    case  PCIB_IVAR_BUS:
+	*result = sc->ap_bus;
+	return(0);
+    }
+    return(ENOENT);
+}
+
+static int
+acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
+{
+    struct acpi_pcib_softc	*sc = device_get_softc(dev);
+
+    switch (which) {
+    case  PCIB_IVAR_BUS:
+	sc->ap_bus = value;
+	return(0);
+    }
+    return(ENOENT);
+}
+
+static u_int32_t
+acpi_pcib_read_config(device_t dev, int bus, int slot, int func, int reg, int bytes)
+{
+    return(pci_cfgregread(bus, slot, func, reg, bytes));
+}
+
+static void
+acpi_pcib_write_config(device_t dev, int bus, int slot, int func, int reg, u_int32_t data, int bytes)
+{
+    pci_cfgregwrite(bus, slot, func, reg, data, bytes);
+}
+
+static int
+acpi_pcib_route_interrupt(device_t bus, int device, int pin)
+{
+    return(255);	/* XXX implement */
+}