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a163d034fa
Approved by: trb
439 lines
12 KiB
C
439 lines
12 KiB
C
/*
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* Copyright (c) 1999, 2000 Matthew R. Green
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* Copyright (c) 2001 Thomas Moestl <tmm@FreeBSD.org>
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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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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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* from: NetBSD: ebus.c,v 1.26 2001/09/10 16:27:53 eeh Exp
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*
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* $FreeBSD$
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*/
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#include "opt_ebus.h"
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/*
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* UltraSPARC 5 and beyond ebus support.
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*
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* note that this driver is not complete:
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* - ebus2 dma code is completely unwritten
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* - interrupt establish is written and appears to work
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* - bus map code is written and appears to work
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* XXX: This is PCI specific, however, there exist SBus-to-EBus bridges...
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* XXX: The EBus was designed to allow easy adaption of ISA devices to it - a
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* compatability layer for ISA devices might be nice, although probably not
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* easily possible because of some cruft (like in[bwl]/out[bwl] and friends).
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* Additionally, the existing ISA code is limited to one ISA bus, however,
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* there are machines with both ISA and EBus.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <ofw/openfirm.h>
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#include <ofw/ofw_pci.h>
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#include <machine/bus.h>
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#include <machine/ofw_bus.h>
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#include <machine/resource.h>
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#include <pci/pcireg.h>
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#include <pci/pcivar.h>
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#include <sparc64/pci/ofw_pci.h>
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/*
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* The register, ranges and interrupt map properties are identical to the ISA
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* ones.
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*/
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#include <sparc64/isa/ofw_isa.h>
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#include <sparc64/ebus/ebusvar.h>
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#ifdef EBUS_DEBUG
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#define EDB_PROM 0x01
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#define EDB_CHILD 0x02
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#define EDB_INTRMAP 0x04
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#define EDB_BUSMAP 0x08
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#define EDB_BUSDMA 0x10
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#define EDB_INTR 0x20
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int ebus_debug = 0xff;
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#define DPRINTF(l, s) do { if (ebus_debug & l) printf s; } while (0)
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#else
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#define DPRINTF(l, s)
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#endif
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struct ebus_devinfo {
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char *edi_name; /* PROM name */
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char *edi_compat;
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phandle_t edi_node; /* PROM node */
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struct resource_list edi_rl;
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};
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struct ebus_softc {
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phandle_t sc_node;
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struct isa_ranges *sc_range;
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int sc_nrange;
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int sc_nimap;
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};
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static int ebus_probe(device_t);
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static int ebus_print_child(device_t, device_t);
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static void ebus_probe_nomatch(device_t, device_t);
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static int ebus_read_ivar(device_t, device_t, int, uintptr_t *);
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static int ebus_write_ivar(device_t, device_t, int, uintptr_t);
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static struct resource *ebus_alloc_resource(device_t, device_t, int, int *,
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u_long, u_long, u_long, u_int);
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static struct resource_list *ebus_get_resource_list(device_t, device_t);
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static struct ebus_devinfo *ebus_setup_dinfo(struct ebus_softc *,
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phandle_t, char *);
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static void ebus_destroy_dinfo(struct ebus_devinfo *);
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static int ebus_print_res(struct ebus_devinfo *);
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static device_method_t ebus_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, ebus_probe),
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DEVMETHOD(device_attach, bus_generic_attach),
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/* Bus interface */
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DEVMETHOD(bus_print_child, ebus_print_child),
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DEVMETHOD(bus_probe_nomatch, ebus_probe_nomatch),
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DEVMETHOD(bus_read_ivar, ebus_read_ivar),
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DEVMETHOD(bus_write_ivar, ebus_write_ivar),
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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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DEVMETHOD(bus_alloc_resource, ebus_alloc_resource),
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DEVMETHOD(bus_get_resource_list, ebus_get_resource_list),
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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_release_resource, bus_generic_rl_release_resource),
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DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
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{ 0, 0 }
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};
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static driver_t ebus_driver = {
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"ebus",
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ebus_methods,
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sizeof(struct ebus_softc),
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};
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static devclass_t ebus_devclass;
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DRIVER_MODULE(ebus, pci, ebus_driver, ebus_devclass, 0, 0);
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static int
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ebus_probe(device_t dev)
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{
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struct ebus_softc *sc;
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struct ebus_devinfo *edi;
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char name[10];
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device_t cdev;
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phandle_t node;
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char *cname;
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/*
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* XXX: PCI specific! There should be a common cookie IVAR value for all
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* buses! Does not really matter much here though...
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*/
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node = ofw_pci_find_node(pci_get_bus(dev), pci_get_slot(dev),
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pci_get_function(dev));
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if (node == 0)
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return (ENXIO);
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/* Match a real ebus */
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OF_getprop(node, "name", &name, sizeof(name));
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if (pci_get_class(dev) != PCIC_BRIDGE ||
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pci_get_vendor(dev) != 0x108e ||
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strcmp(name, "ebus") != 0)
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return (ENXIO);
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if (pci_get_device(dev) == 0x1000)
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device_set_desc(dev, "PCI-EBus2 bridge");
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else if (pci_get_device(dev) == 0x1100)
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device_set_desc(dev, "PCI-EBus3 bridge");
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else
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return (ENXIO);
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device_printf(dev, "revision 0x%02x\n", pci_get_revid(dev));
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sc = device_get_softc(dev);
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sc->sc_node = node;
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sc->sc_nrange = OF_getprop_alloc(node, "ranges",
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sizeof(*sc->sc_range), (void **)&sc->sc_range);
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if (sc->sc_nrange == -1)
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panic("ebus_attach: could not get ranges property");
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/*
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* now attach all our children
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*/
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DPRINTF(EDB_CHILD, ("ebus node %08x, searching children...\n", node));
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for (node = OF_child(node); node > 0; node = OF_peer(node)) {
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if ((OF_getprop_alloc(node, "name", 1, (void **)&cname)) == -1)
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continue;
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if ((edi = ebus_setup_dinfo(sc, node, cname)) == NULL) {
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device_printf(dev, "<%s>: incomplete\n", cname);
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free(cname, M_OFWPROP);
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continue;
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}
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if ((cdev = device_add_child(dev, NULL, -1)) == NULL)
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panic("ebus_attach: device_add_child failed");
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device_set_ivars(cdev, edi);
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}
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return (0);
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}
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static int
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ebus_print_child(device_t dev, device_t child)
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{
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struct ebus_devinfo *edi;
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int retval;
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edi = device_get_ivars(child);
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retval = bus_print_child_header(dev, child);
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retval += ebus_print_res(edi);
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retval += bus_print_child_footer(dev, child);
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return (retval);
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}
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static void
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ebus_probe_nomatch(device_t dev, device_t child)
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{
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struct ebus_devinfo *edi;
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edi = device_get_ivars(child);
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device_printf(dev, "<%s>", edi->edi_name);
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ebus_print_res(edi);
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printf(" (no driver attached)\n");
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}
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static int
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ebus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
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{
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struct ebus_devinfo *dinfo;
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if ((dinfo = device_get_ivars(child)) == NULL)
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return (ENOENT);
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switch (which) {
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case EBUS_IVAR_COMPAT:
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*result = (uintptr_t)dinfo->edi_compat;
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break;
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case EBUS_IVAR_NAME:
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*result = (uintptr_t)dinfo->edi_name;
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break;
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case EBUS_IVAR_NODE:
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*result = dinfo->edi_node;
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break;
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default:
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return (ENOENT);
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}
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return 0;
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}
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static int
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ebus_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
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{
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struct ebus_devinfo *dinfo;
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if ((dinfo = device_get_ivars(child)) == NULL)
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return (ENOENT);
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switch (which) {
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case EBUS_IVAR_COMPAT:
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case EBUS_IVAR_NAME:
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case EBUS_IVAR_NODE:
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return (EINVAL);
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default:
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return (ENOENT);
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}
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return 0;
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}
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static struct resource *
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ebus_alloc_resource(device_t bus, device_t child, int type, int *rid,
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u_long start, u_long end, u_long count, u_int flags)
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{
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struct ebus_softc *sc;
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struct resource_list *rl;
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struct resource_list_entry *rle;
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struct ebus_devinfo *edi;
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int passthrough = (device_get_parent(child) != bus);
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int isdefault = (start == 0UL && end == ~0UL);
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u_long nstart, nend;
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int ptype;
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sc = (struct ebus_softc *)device_get_softc(bus);
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edi = device_get_ivars(child);
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rl = &edi->edi_rl;
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/*
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* Map ebus ranges to PCI ranges. This may include changing the
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* allocation type.
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*/
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ptype = type;
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nstart = start;
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nend = end;
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switch (type) {
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case SYS_RES_IOPORT:
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if (!isdefault && !passthrough) {
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ptype = ofw_isa_map_iorange(sc->sc_range, sc->sc_nrange,
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&nstart, &nend);
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}
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if (isdefault && passthrough) {
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panic("ebus_alloc_resource: passthrough of default "
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"allocation not supported");
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}
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break;
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case SYS_RES_IRQ:
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break;
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default:
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panic("ebus_alloc_resource: unsupported resource type %d",
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type);
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}
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/*
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* This inlines a modified resource_list_alloc(); this is needed
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* because the resources need to be mapped into the bus space.
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* This could be done when the resources are added to the resource
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* lists, however doing it here is slightly more flexible.
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*/
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if (passthrough) {
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return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
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ptype, rid, nstart, nend, count, flags));
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}
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rle = resource_list_find(rl, type, *rid);
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if (rle == NULL)
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return (NULL); /* no resource of that type/rid */
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if (rle->res != NULL)
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panic("ebus_alloc_resource: resource entry is busy");
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if (isdefault) {
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nstart = rle->start;
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count = ulmax(count, rle->count);
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nend = ulmax(rle->end, nstart + count - 1);
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if (type == SYS_RES_IOPORT) {
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ptype = ofw_isa_map_iorange(sc->sc_range, sc->sc_nrange,
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&nstart, &nend);
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}
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}
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rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
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ptype, rid, nstart, nend, count, flags);
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return (rle->res);
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}
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static struct resource_list *
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ebus_get_resource_list(device_t dev, device_t child)
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{
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struct ebus_devinfo *edi;
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edi = device_get_ivars(child);
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return (&edi->edi_rl);
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}
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static struct ebus_devinfo *
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ebus_setup_dinfo(struct ebus_softc *sc, phandle_t node, char *name)
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{
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struct ebus_devinfo *edi;
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struct isa_regs *reg;
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u_int32_t *intrs, intr;
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u_int64_t start;
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int nreg, nintr, i;
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edi = malloc(sizeof(*edi), M_DEVBUF, M_ZERO | M_WAITOK);
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if (edi == NULL)
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return (NULL);
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resource_list_init(&edi->edi_rl);
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edi->edi_name = name;
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edi->edi_node = node;
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OF_getprop_alloc(node, "compat", 1, (void **)&edi->edi_compat);
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nreg = OF_getprop_alloc(node, "reg", sizeof(*reg), (void **)®);
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if (nreg == -1) {
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ebus_destroy_dinfo(edi);
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return (NULL);
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}
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for (i = 0; i < nreg; i++) {
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start = ISA_REG_PHYS(reg + i);
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/*
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* XXX: use SYS_RES_IOPORT for compatability with ISA drivers -
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* probably, SYS_RES_MEMORY would be more apporpriate, although
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* that does not really matter.
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*/
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resource_list_add(&edi->edi_rl, SYS_RES_IOPORT, i,
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start, start + reg[i].size - 1, reg[i].size);
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}
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nintr = OF_getprop_alloc(node, "interrupts", sizeof(*intrs),
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(void **)&intrs);
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for (i = 0; i < nintr; i++) {
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intr = ofw_bus_route_intr(node, intrs[i], ofw_pci_orb_callback);
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if (intr == ORIR_NOTFOUND) {
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panic("ebus_setup_dinfo: could not map ebus "
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"interrupt %d", intrs[i]);
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}
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resource_list_add(&edi->edi_rl, SYS_RES_IRQ, i,
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intr, intr, 1);
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}
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free(reg, M_OFWPROP);
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return (edi);
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}
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/*
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* NOTE: This does not free the name member (it is needed afterwards in some
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* cases).
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*/
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static void
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ebus_destroy_dinfo(struct ebus_devinfo *edi)
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{
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resource_list_free(&edi->edi_rl);
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free(edi, M_DEVBUF);
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}
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static int
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ebus_print_res(struct ebus_devinfo *edi)
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{
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int retval;
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retval = 0;
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retval += resource_list_print_type(&edi->edi_rl, "addr", SYS_RES_IOPORT,
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"%#lx");
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retval += resource_list_print_type(&edi->edi_rl, "irq", SYS_RES_IRQ,
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"%ld");
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return (retval);
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}
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