250 lines
6.7 KiB
C
250 lines
6.7 KiB
C
/*
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* Copyright (c) 1997, Stefan Esser <se@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 unmodified, this list of conditions, and the following
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* 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 ``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, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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/*
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* Provide a device to "eat" the host->pci bridge devices that show up
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* on PCI busses and stop them showing up twice on the probes. This also
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* stops them showing up as 'none' in pciconf -l. If the host bridge
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* provides an AGP capability then we create a child agp device for the
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* agp GART driver to attach to.
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*/
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static int
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pci_hostb_probe(device_t dev)
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{
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u_int32_t id;
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id = pci_get_devid(dev);
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switch (id) {
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/* VIA VT82C596 Power Managment Function */
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case 0x30501106:
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return (ENXIO);
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default:
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break;
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}
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if (pci_get_class(dev) == PCIC_BRIDGE &&
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pci_get_subclass(dev) == PCIS_BRIDGE_HOST) {
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device_set_desc(dev, "Host to PCI bridge");
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device_quiet(dev);
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return (-10000);
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}
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return (ENXIO);
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}
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static int
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pci_hostb_attach(device_t dev)
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{
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bus_generic_probe(dev);
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/*
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* If AGP capabilities are present on this device, then create
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* an AGP child.
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*/
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if (pci_find_cap(dev, PCIY_AGP, NULL) == 0)
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device_add_child(dev, "agp", -1);
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bus_generic_attach(dev);
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return (0);
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}
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/* Bus interface. */
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static int
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pci_hostb_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
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{
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return (BUS_READ_IVAR(device_get_parent(dev), dev, which, result));
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}
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static int
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pci_hostb_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
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{
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return (EINVAL);
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}
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static struct resource *
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pci_hostb_alloc_resource(device_t dev, 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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return (bus_alloc_resource(dev, type, rid, start, end, count, flags));
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}
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static int
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pci_hostb_release_resource(device_t dev, device_t child, int type, int rid,
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struct resource *r)
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{
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return (bus_release_resource(dev, type, rid, r));
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}
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/* PCI interface. */
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static uint32_t
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pci_hostb_read_config(device_t dev, device_t child, int reg, int width)
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{
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return (pci_read_config(dev, reg, width));
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}
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static void
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pci_hostb_write_config(device_t dev, device_t child, int reg,
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uint32_t val, int width)
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{
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pci_write_config(dev, reg, val, width);
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}
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static int
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pci_hostb_enable_busmaster(device_t dev, device_t child)
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{
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device_printf(dev, "child %s requested pci_enable_busmaster\n",
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device_get_nameunit(child));
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return (pci_enable_busmaster(dev));
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}
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static int
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pci_hostb_disable_busmaster(device_t dev, device_t child)
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{
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device_printf(dev, "child %s requested pci_disable_busmaster\n",
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device_get_nameunit(child));
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return (pci_disable_busmaster(dev));
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}
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static int
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pci_hostb_enable_io(device_t dev, device_t child, int space)
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{
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device_printf(dev, "child %s requested pci_enable_io\n",
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device_get_nameunit(child));
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return (pci_enable_io(dev, space));
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}
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static int
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pci_hostb_disable_io(device_t dev, device_t child, int space)
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{
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device_printf(dev, "child %s requested pci_disable_io\n",
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device_get_nameunit(child));
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return (pci_disable_io(dev, space));
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}
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static int
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pci_hostb_set_powerstate(device_t dev, device_t child, int state)
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{
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device_printf(dev, "child %s requested pci_set_powerstate\n",
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device_get_nameunit(child));
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return (pci_set_powerstate(dev, state));
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}
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static int
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pci_hostb_get_powerstate(device_t dev, device_t child)
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{
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device_printf(dev, "child %s requested pci_get_powerstate\n",
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device_get_nameunit(child));
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return (pci_get_powerstate(dev));
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}
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static int
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pci_hostb_assign_interrupt(device_t dev, device_t child)
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{
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device_printf(dev, "child %s requested pci_assign_interrupt\n",
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device_get_nameunit(child));
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return (PCI_ASSIGN_INTERRUPT(device_get_parent(dev), dev));
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}
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static int
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pci_hostb_find_extcap(device_t dev, device_t child, int capability,
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int *capreg)
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{
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return (pci_find_extcap(dev, capability, capreg));
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}
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static device_method_t pci_hostb_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, pci_hostb_probe),
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DEVMETHOD(device_attach, pci_hostb_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_read_ivar, pci_hostb_read_ivar),
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DEVMETHOD(bus_write_ivar, pci_hostb_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, pci_hostb_alloc_resource),
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DEVMETHOD(bus_release_resource, pci_hostb_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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/* PCI interface */
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DEVMETHOD(pci_read_config, pci_hostb_read_config),
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DEVMETHOD(pci_write_config, pci_hostb_write_config),
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DEVMETHOD(pci_enable_busmaster, pci_hostb_enable_busmaster),
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DEVMETHOD(pci_disable_busmaster, pci_hostb_disable_busmaster),
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DEVMETHOD(pci_enable_io, pci_hostb_enable_io),
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DEVMETHOD(pci_disable_io, pci_hostb_disable_io),
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DEVMETHOD(pci_get_powerstate, pci_hostb_get_powerstate),
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DEVMETHOD(pci_set_powerstate, pci_hostb_set_powerstate),
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DEVMETHOD(pci_assign_interrupt, pci_hostb_assign_interrupt),
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DEVMETHOD(pci_find_extcap, pci_hostb_find_extcap),
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{ 0, 0 }
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};
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static driver_t pci_hostb_driver = {
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"hostb",
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pci_hostb_methods,
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1,
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};
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static devclass_t pci_hostb_devclass;
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DRIVER_MODULE(hostb, pci, pci_hostb_driver, pci_hostb_devclass, 0, 0);
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