diff options
Diffstat (limited to 'freebsd/sys/powerpc/ofw/ofw_pcib_pci.c')
| -rw-r--r-- | freebsd/sys/powerpc/ofw/ofw_pcib_pci.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/freebsd/sys/powerpc/ofw/ofw_pcib_pci.c b/freebsd/sys/powerpc/ofw/ofw_pcib_pci.c new file mode 100644 index 00000000..26dd52ba --- /dev/null +++ b/freebsd/sys/powerpc/ofw/ofw_pcib_pci.c @@ -0,0 +1,178 @@ +#include <machine/rtems-bsd-kernel-space.h> + +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/module.h> +#include <sys/bus.h> +#include <sys/malloc.h> +#include <sys/kernel.h> + +#include <dev/ofw/openfirm.h> +#include <dev/ofw/ofw_pci.h> +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include <dev/pci/pcivar.h> +#include <dev/pci/pcireg.h> +#include <dev/pci/pcib_private.h> + +#include <machine/intr_machdep.h> + +#include <rtems/bsd/local/pcib_if.h> + +static int ofw_pcib_pci_probe(device_t bus); +static int ofw_pcib_pci_attach(device_t bus); +static phandle_t ofw_pcib_pci_get_node(device_t bus, device_t dev); +static int ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, + int intpin); + +static device_method_t ofw_pcib_pci_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, ofw_pcib_pci_probe), + DEVMETHOD(device_attach, ofw_pcib_pci_attach), + + /* pcib interface */ + DEVMETHOD(pcib_route_interrupt, ofw_pcib_pci_route_interrupt), + DEVMETHOD(pcib_request_feature, pcib_request_feature_allow), + + /* ofw_bus interface */ + DEVMETHOD(ofw_bus_get_node, ofw_pcib_pci_get_node), + + DEVMETHOD_END +}; + +static devclass_t pcib_devclass; + +struct ofw_pcib_softc { + /* + * This is here so that we can use pci bridge methods, too - the + * generic routines only need the dev, secbus and subbus members + * filled. + */ + struct pcib_softc ops_pcib_sc; + phandle_t ops_node; + struct ofw_bus_iinfo ops_iinfo; +}; + +DEFINE_CLASS_1(pcib, ofw_pcib_pci_driver, ofw_pcib_pci_methods, + sizeof(struct ofw_pcib_softc), pcib_driver); +EARLY_DRIVER_MODULE(ofw_pcib, pci, ofw_pcib_pci_driver, pcib_devclass, 0, 0, + BUS_PASS_BUS); + +static int +ofw_pcib_pci_probe(device_t dev) +{ + + if ((pci_get_class(dev) != PCIC_BRIDGE) || + (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) { + return (ENXIO); + } + + if (ofw_bus_get_node(dev) == -1) + return (ENXIO); + + device_set_desc(dev, "OFW PCI-PCI bridge"); + return (0); +} + +static int +ofw_pcib_pci_attach(device_t dev) +{ + struct ofw_pcib_softc *sc; + + sc = device_get_softc(dev); + sc->ops_pcib_sc.dev = dev; + sc->ops_node = ofw_bus_get_node(dev); + + ofw_bus_setup_iinfo(sc->ops_node, &sc->ops_iinfo, + sizeof(cell_t)); + + pcib_attach_common(dev); + return (pcib_attach_child(dev)); +} + +static phandle_t +ofw_pcib_pci_get_node(device_t bridge, device_t dev) +{ + /* We have only one child, the PCI bus, so pass it our node */ + + return (ofw_bus_get_node(bridge)); +} + +static int +ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, int intpin) +{ + struct ofw_pcib_softc *sc; + struct ofw_bus_iinfo *ii; + struct ofw_pci_register reg; + cell_t pintr, mintr[2]; + int intrcells; + phandle_t iparent; + + sc = device_get_softc(bridge); + ii = &sc->ops_iinfo; + if (ii->opi_imapsz > 0) { + pintr = intpin; + + /* Fabricate imap information if this isn't an OFW device */ + bzero(®, sizeof(reg)); + reg.phys_hi = (pci_get_bus(dev) << OFW_PCI_PHYS_HI_BUSSHIFT) | + (pci_get_slot(dev) << OFW_PCI_PHYS_HI_DEVICESHIFT) | + (pci_get_function(dev) << OFW_PCI_PHYS_HI_FUNCTIONSHIFT); + + intrcells = ofw_bus_lookup_imap(ofw_bus_get_node(dev), ii, ®, + sizeof(reg), &pintr, sizeof(pintr), mintr, sizeof(mintr), + &iparent); + if (intrcells) { + /* + * If we've found a mapping, return it and don't map + * it again on higher levels - that causes problems + * in some cases, and never seems to be required. + */ + mintr[0] = ofw_bus_map_intr(dev, iparent, intrcells, + mintr); + return (mintr[0]); + } + } else if (intpin >= 1 && intpin <= 4) { + /* + * When an interrupt map is missing, we need to do the + * standard PCI swizzle and continue mapping at the parent. + */ + return (pcib_route_interrupt(bridge, dev, intpin)); + } + return (PCIB_ROUTE_INTERRUPT(device_get_parent(device_get_parent( + bridge)), bridge, intpin)); +} + |