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/*
* Copyright (c) 1997, Stefan Esser <se@freebsd.org>
* 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 unmodified, 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 ``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 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/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
/*
* Provide a device to "eat" the host->pci bridge devices that show up
* on PCI busses and stop them showing up twice on the probes. This also
* stops them showing up as 'none' in pciconf -l. If the host bridge
* provides an AGP capability then we create a child agp device for the
* agp GART driver to attach to.
*/
static int
pci_hostb_probe(device_t dev)
{
u_int32_t id;
id = pci_get_devid(dev);
switch (id) {
/* VIA VT82C596 Power Managment Function */
case 0x30501106:
return (ENXIO);
default:
break;
}
if (pci_get_class(dev) == PCIC_BRIDGE &&
pci_get_subclass(dev) == PCIS_BRIDGE_HOST) {
device_set_desc(dev, "Host to PCI bridge");
device_quiet(dev);
return (-10000);
}
return (ENXIO);
}
static int
pci_hostb_attach(device_t dev)
{
bus_generic_probe(dev);
/*
* If AGP capabilities are present on this device, then create
* an AGP child.
*/
if (pci_find_extcap(dev, PCIY_AGP, NULL) == 0)
device_add_child(dev, "agp", -1);
bus_generic_attach(dev);
return (0);
}
/* Bus interface. */
static int
pci_hostb_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
return (BUS_READ_IVAR(device_get_parent(dev), dev, which, result));
}
static int
pci_hostb_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
{
return (EINVAL);
}
static struct resource *
pci_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
return (bus_alloc_resource(dev, type, rid, start, end, count, flags));
}
static int
pci_hostb_release_resource(device_t dev, device_t child, int type, int rid,
struct resource *r)
{
return (bus_release_resource(dev, type, rid, r));
}
/* PCI interface. */
static uint32_t
pci_hostb_read_config(device_t dev, device_t child, int reg, int width)
{
return (pci_read_config(dev, reg, width));
}
static void
pci_hostb_write_config(device_t dev, device_t child, int reg,
uint32_t val, int width)
{
pci_write_config(dev, reg, val, width);
}
static int
pci_hostb_enable_busmaster(device_t dev, device_t child)
{
device_printf(dev, "child %s requested pci_enable_busmaster\n",
device_get_nameunit(child));
return (pci_enable_busmaster(dev));
}
static int
pci_hostb_disable_busmaster(device_t dev, device_t child)
{
device_printf(dev, "child %s requested pci_disable_busmaster\n",
device_get_nameunit(child));
return (pci_disable_busmaster(dev));
}
static int
pci_hostb_enable_io(device_t dev, device_t child, int space)
{
device_printf(dev, "child %s requested pci_enable_io\n",
device_get_nameunit(child));
return (pci_enable_io(dev, space));
}
static int
pci_hostb_disable_io(device_t dev, device_t child, int space)
{
device_printf(dev, "child %s requested pci_disable_io\n",
device_get_nameunit(child));
return (pci_disable_io(dev, space));
}
static int
pci_hostb_set_powerstate(device_t dev, device_t child, int state)
{
device_printf(dev, "child %s requested pci_set_powerstate\n",
device_get_nameunit(child));
return (pci_set_powerstate(dev, state));
}
static int
pci_hostb_get_powerstate(device_t dev, device_t child)
{
device_printf(dev, "child %s requested pci_get_powerstate\n",
device_get_nameunit(child));
return (pci_get_powerstate(dev));
}
static int
pci_hostb_assign_interrupt(device_t dev, device_t child)
{
device_printf(dev, "child %s requested pci_assign_interrupt\n",
device_get_nameunit(child));
return (PCI_ASSIGN_INTERRUPT(device_get_parent(dev), dev));
}
static int
pci_hostb_find_extcap(device_t dev, device_t child, int capability,
int *capreg)
{
return (pci_find_extcap(dev, capability, capreg));
}
static device_method_t pci_hostb_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, pci_hostb_probe),
DEVMETHOD(device_attach, pci_hostb_attach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
DEVMETHOD(bus_read_ivar, pci_hostb_read_ivar),
DEVMETHOD(bus_write_ivar, pci_hostb_write_ivar),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
DEVMETHOD(bus_alloc_resource, pci_hostb_alloc_resource),
DEVMETHOD(bus_release_resource, pci_hostb_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
/* PCI interface */
DEVMETHOD(pci_read_config, pci_hostb_read_config),
DEVMETHOD(pci_write_config, pci_hostb_write_config),
DEVMETHOD(pci_enable_busmaster, pci_hostb_enable_busmaster),
DEVMETHOD(pci_disable_busmaster, pci_hostb_disable_busmaster),
DEVMETHOD(pci_enable_io, pci_hostb_enable_io),
DEVMETHOD(pci_disable_io, pci_hostb_disable_io),
DEVMETHOD(pci_get_powerstate, pci_hostb_get_powerstate),
DEVMETHOD(pci_set_powerstate, pci_hostb_set_powerstate),
DEVMETHOD(pci_assign_interrupt, pci_hostb_assign_interrupt),
DEVMETHOD(pci_find_extcap, pci_hostb_find_extcap),
{ 0, 0 }
};
static driver_t pci_hostb_driver = {
"hostb",
pci_hostb_methods,
1,
};
static devclass_t pci_hostb_devclass;
DRIVER_MODULE(hostb, pci, pci_hostb_driver, pci_hostb_devclass, 0, 0);
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