39a8493ac0
ACPICA properly). This makes it possible to use ACPICA in conjunction with CardBus before I get around to implementing ACPI/PCI interrupt routing.
254 lines
7.7 KiB
C
254 lines
7.7 KiB
C
/*-
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* Copyright (c) 2000 Michael Smith
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* Copyright (c) 2000 BSDi
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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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#include "opt_acpi.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include "acpi.h"
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#include <dev/acpica/acpivar.h>
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#include <machine/pci_cfgreg.h>
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#include <pci/pcivar.h>
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#include "pcib_if.h"
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/*
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* Hooks for the ACPI CA debugging infrastructure
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*/
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#define _COMPONENT BUS_MANAGER
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MODULE_NAME("PCIB")
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struct acpi_pcib_softc {
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device_t ap_dev;
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ACPI_HANDLE ap_handle;
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int ap_segment; /* analagous to Alpha 'hose' */
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int ap_bus; /* bios-assigned bus number */
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};
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static int acpi_pcib_probe(device_t bus);
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static int acpi_pcib_attach(device_t bus);
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static int acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result);
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static int acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value);
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static int acpi_pcib_maxslots(device_t dev);
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static u_int32_t acpi_pcib_read_config(device_t dev, int bus, int slot, int func, int reg, int bytes);
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static void acpi_pcib_write_config(device_t dev, int bus, int slot, int func, int reg,
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u_int32_t data, int bytes);
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static int acpi_pcib_route_interrupt(device_t pcib, device_t dev, int pin);
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static device_method_t acpi_pcib_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, acpi_pcib_probe),
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DEVMETHOD(device_attach, acpi_pcib_attach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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/* Bus interface */
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DEVMETHOD(bus_print_child, bus_generic_print_child),
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DEVMETHOD(bus_read_ivar, acpi_pcib_read_ivar),
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DEVMETHOD(bus_write_ivar, acpi_pcib_write_ivar),
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DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
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DEVMETHOD(bus_release_resource, bus_generic_release_resource),
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DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
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DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
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DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
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DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
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/* pcib interface */
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DEVMETHOD(pcib_maxslots, acpi_pcib_maxslots),
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DEVMETHOD(pcib_read_config, acpi_pcib_read_config),
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DEVMETHOD(pcib_write_config, acpi_pcib_write_config),
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DEVMETHOD(pcib_route_interrupt, acpi_pcib_route_interrupt),
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{0, 0}
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};
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static driver_t acpi_pcib_driver = {
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"acpi_pcib",
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acpi_pcib_methods,
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sizeof(struct acpi_pcib_softc),
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};
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devclass_t acpi_pcib_devclass;
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DRIVER_MODULE(acpi_pcib, acpi, acpi_pcib_driver, acpi_pcib_devclass, 0, 0);
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static int
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acpi_pcib_probe(device_t dev)
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{
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if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) &&
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!acpi_disabled("pci") &&
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acpi_MatchHid(dev, "PNP0A03")) {
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/*
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* Set device description
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*/
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device_set_desc(dev, "Host-PCI bridge");
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return(0);
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}
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return(ENXIO);
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}
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static int
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acpi_pcib_attach(device_t dev)
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{
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struct acpi_pcib_softc *sc;
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device_t child;
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ACPI_STATUS status;
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int result;
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FUNCTION_TRACE(__FUNCTION__);
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sc = device_get_softc(dev);
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sc->ap_dev = dev;
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sc->ap_handle = acpi_get_handle(dev);
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/*
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* Don't attach if we're not really there.
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*
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* XXX this isn't entirely correct, since we may be a PCI bus
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* on a hot-plug docking station, etc.
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*/
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if (!acpi_DeviceIsPresent(dev))
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return_VALUE(ENXIO);
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/*
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* Get our segment number by evaluating _SEG
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* It's OK for this to not exist.
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*/
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if ((status = acpi_EvaluateNumber(sc->ap_handle, "_SEG", &sc->ap_segment)) != AE_OK) {
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if (status != AE_NOT_FOUND) {
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device_printf(dev, "could not evaluate _SEG - %s\n", acpi_strerror(status));
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return_VALUE(ENXIO);
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}
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/* if it's not found, assume 0 */
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sc->ap_segment = 0;
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}
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/*
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* Get our base bus number by evaluating _BBN
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* If this doesn't exist, we assume we're bus number 0.
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*
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* XXX note that it may also not exist in the case where we are
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* meant to use a private configuration space mechanism for this bus,
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* so we should dig out our resources and check to see if we have
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* anything like that. How do we do this?
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* XXX If we have the requisite information, and if we don't think the
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* default PCI configuration space handlers can deal with this bus,
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* we should attach our own handler.
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* XXX invoke _REG on this for the PCI config space address space?
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*/
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if ((status = acpi_EvaluateNumber(sc->ap_handle, "_BBN", &sc->ap_bus)) != AE_OK) {
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if (status != AE_NOT_FOUND) {
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device_printf(dev, "could not evaluate _BBN - %s\n", acpi_strerror(status));
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return_VALUE(ENXIO);
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}
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/* if it's not found, assume 0 */
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sc->ap_bus = 0;
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}
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/*
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* Make sure that this bus hasn't already been found. If it has, return silently
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* (should we complain here?).
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*/
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if (devclass_get_device(devclass_find("pci"), sc->ap_bus) != NULL)
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return_VALUE(0);
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/*
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* Attach the PCI bus proper.
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*/
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if ((child = device_add_child(dev, "pci", sc->ap_bus)) == NULL) {
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device_printf(device_get_parent(dev), "couldn't attach pci bus");
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return_VALUE(ENXIO);
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}
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/*
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* Now go scan the bus.
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*
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* XXX It would be nice to defer this and count on the nexus getting it
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* after the first pass, but this does not seem to be reliable.
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*/
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result = bus_generic_attach(dev);
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return_VALUE(result);
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}
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static int
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acpi_pcib_maxslots(device_t dev)
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{
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return(31);
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}
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static int
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acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
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{
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struct acpi_pcib_softc *sc = device_get_softc(dev);
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switch (which) {
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case PCIB_IVAR_BUS:
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*result = sc->ap_bus;
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return(0);
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}
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return(ENOENT);
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}
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static int
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acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
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{
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struct acpi_pcib_softc *sc = device_get_softc(dev);
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switch (which) {
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case PCIB_IVAR_BUS:
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sc->ap_bus = value;
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return(0);
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}
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return(ENOENT);
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}
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static u_int32_t
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acpi_pcib_read_config(device_t dev, int bus, int slot, int func, int reg, int bytes)
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{
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return(pci_cfgregread(bus, slot, func, reg, bytes));
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}
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static void
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acpi_pcib_write_config(device_t dev, int bus, int slot, int func, int reg, u_int32_t data, int bytes)
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{
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pci_cfgregwrite(bus, slot, func, reg, data, bytes);
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}
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static int
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acpi_pcib_route_interrupt(device_t pcib, device_t dev, int pin)
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{
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/* XXX this is not the right way to do this! */
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pci_cfgregopen();
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return(pci_cfgintr(pci_get_bus(dev), pci_get_slot(dev), pin));
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}
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