2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
37 #include <dev/pci/pcivar.h>
38 #include <dev/pci/pcireg.h>
41 * Provide a device to "eat" the host->pci bridge devices that show up
42 * on PCI buses and stop them showing up twice on the probes. This also
43 * stops them showing up as 'none' in pciconf -l. If the host bridge
44 * provides an AGP capability then we create a child agp device for the
45 * agp GART driver to attach to.
48 pci_hostb_probe(device_t dev)
52 id = pci_get_devid(dev);
56 /* VIA VT82C596 Power Management Function */
64 if (pci_get_class(dev) == PCIC_BRIDGE &&
65 pci_get_subclass(dev) == PCIS_BRIDGE_HOST) {
66 device_set_desc(dev, "Host to PCI bridge");
74 pci_hostb_attach(device_t dev)
77 bus_generic_probe(dev);
80 * If AGP capabilities are present on this device, then create
83 if (pci_find_cap(dev, PCIY_AGP, NULL) == 0)
84 device_add_child(dev, "agp", -1);
85 bus_generic_attach(dev);
92 pci_hostb_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
95 return (BUS_READ_IVAR(device_get_parent(dev), dev, which, result));
99 pci_hostb_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
105 static struct resource *
106 pci_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid,
107 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
110 return (bus_alloc_resource(dev, type, rid, start, end, count, flags));
114 pci_hostb_release_resource(device_t dev, device_t child, int type, int rid,
118 return (bus_release_resource(dev, type, rid, r));
124 pci_hostb_read_config(device_t dev, device_t child, int reg, int width)
127 return (pci_read_config(dev, reg, width));
131 pci_hostb_write_config(device_t dev, device_t child, int reg,
132 uint32_t val, int width)
135 pci_write_config(dev, reg, val, width);
139 pci_hostb_enable_busmaster(device_t dev, device_t child)
142 device_printf(dev, "child %s requested pci_enable_busmaster\n",
143 device_get_nameunit(child));
144 return (pci_enable_busmaster(dev));
148 pci_hostb_disable_busmaster(device_t dev, device_t child)
151 device_printf(dev, "child %s requested pci_disable_busmaster\n",
152 device_get_nameunit(child));
153 return (pci_disable_busmaster(dev));
157 pci_hostb_enable_io(device_t dev, device_t child, int space)
160 device_printf(dev, "child %s requested pci_enable_io\n",
161 device_get_nameunit(child));
162 return (pci_enable_io(dev, space));
166 pci_hostb_disable_io(device_t dev, device_t child, int space)
169 device_printf(dev, "child %s requested pci_disable_io\n",
170 device_get_nameunit(child));
171 return (pci_disable_io(dev, space));
175 pci_hostb_set_powerstate(device_t dev, device_t child, int state)
178 device_printf(dev, "child %s requested pci_set_powerstate\n",
179 device_get_nameunit(child));
180 return (pci_set_powerstate(dev, state));
184 pci_hostb_get_powerstate(device_t dev, device_t child)
187 device_printf(dev, "child %s requested pci_get_powerstate\n",
188 device_get_nameunit(child));
189 return (pci_get_powerstate(dev));
193 pci_hostb_assign_interrupt(device_t dev, device_t child)
196 device_printf(dev, "child %s requested pci_assign_interrupt\n",
197 device_get_nameunit(child));
198 return (PCI_ASSIGN_INTERRUPT(device_get_parent(dev), dev));
202 pci_hostb_find_cap(device_t dev, device_t child, int capability,
206 return (pci_find_cap(dev, capability, capreg));
210 pci_hostb_find_extcap(device_t dev, device_t child, int capability,
214 return (pci_find_extcap(dev, capability, capreg));
218 pci_hostb_find_htcap(device_t dev, device_t child, int capability,
222 return (pci_find_htcap(dev, capability, capreg));
225 static device_method_t pci_hostb_methods[] = {
226 /* Device interface */
227 DEVMETHOD(device_probe, pci_hostb_probe),
228 DEVMETHOD(device_attach, pci_hostb_attach),
229 DEVMETHOD(device_shutdown, bus_generic_shutdown),
230 DEVMETHOD(device_suspend, bus_generic_suspend),
231 DEVMETHOD(device_resume, bus_generic_resume),
234 DEVMETHOD(bus_read_ivar, pci_hostb_read_ivar),
235 DEVMETHOD(bus_write_ivar, pci_hostb_write_ivar),
236 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
237 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
239 DEVMETHOD(bus_alloc_resource, pci_hostb_alloc_resource),
240 DEVMETHOD(bus_release_resource, pci_hostb_release_resource),
241 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
242 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
245 DEVMETHOD(pci_read_config, pci_hostb_read_config),
246 DEVMETHOD(pci_write_config, pci_hostb_write_config),
247 DEVMETHOD(pci_enable_busmaster, pci_hostb_enable_busmaster),
248 DEVMETHOD(pci_disable_busmaster, pci_hostb_disable_busmaster),
249 DEVMETHOD(pci_enable_io, pci_hostb_enable_io),
250 DEVMETHOD(pci_disable_io, pci_hostb_disable_io),
251 DEVMETHOD(pci_get_powerstate, pci_hostb_get_powerstate),
252 DEVMETHOD(pci_set_powerstate, pci_hostb_set_powerstate),
253 DEVMETHOD(pci_assign_interrupt, pci_hostb_assign_interrupt),
254 DEVMETHOD(pci_find_cap, pci_hostb_find_cap),
255 DEVMETHOD(pci_find_extcap, pci_hostb_find_extcap),
256 DEVMETHOD(pci_find_htcap, pci_hostb_find_htcap),
261 static driver_t pci_hostb_driver = {
267 static devclass_t pci_hostb_devclass;
269 DRIVER_MODULE(hostb, pci, pci_hostb_driver, pci_hostb_devclass, 0, 0);