2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright 1997, Stefan Esser <se@freebsd.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice unmodified, this list of conditions, and the following
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
36 #include <dev/pci/pcivar.h>
37 #include <dev/pci/pcireg.h>
40 * Provide a device to "eat" the host->pci bridge devices that show up
41 * on PCI buses and stop them showing up twice on the probes. This also
42 * stops them showing up as 'none' in pciconf -l. If the host bridge
43 * provides an AGP capability then we create a child agp device for the
44 * agp GART driver to attach to.
47 pci_hostb_probe(device_t dev)
51 id = pci_get_devid(dev);
55 /* VIA VT82C596 Power Management Function */
63 if (pci_get_class(dev) == PCIC_BRIDGE &&
64 pci_get_subclass(dev) == PCIS_BRIDGE_HOST) {
65 device_set_desc(dev, "Host to PCI bridge");
73 pci_hostb_attach(device_t dev)
76 bus_generic_probe(dev);
79 * If AGP capabilities are present on this device, then create
82 if (pci_find_cap(dev, PCIY_AGP, NULL) == 0)
83 device_add_child(dev, "agp", -1);
84 bus_generic_attach(dev);
91 pci_hostb_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
94 return (BUS_READ_IVAR(device_get_parent(dev), dev, which, result));
98 pci_hostb_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
104 static struct resource *
105 pci_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid,
106 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
109 return (bus_alloc_resource(dev, type, rid, start, end, count, flags));
113 pci_hostb_release_resource(device_t dev, device_t child, int type, int rid,
117 return (bus_release_resource(dev, type, rid, r));
123 pci_hostb_read_config(device_t dev, device_t child, int reg, int width)
126 return (pci_read_config(dev, reg, width));
130 pci_hostb_write_config(device_t dev, device_t child, int reg,
131 uint32_t val, int width)
134 pci_write_config(dev, reg, val, width);
138 pci_hostb_enable_busmaster(device_t dev, device_t child)
141 device_printf(dev, "child %s requested pci_enable_busmaster\n",
142 device_get_nameunit(child));
143 return (pci_enable_busmaster(dev));
147 pci_hostb_disable_busmaster(device_t dev, device_t child)
150 device_printf(dev, "child %s requested pci_disable_busmaster\n",
151 device_get_nameunit(child));
152 return (pci_disable_busmaster(dev));
156 pci_hostb_enable_io(device_t dev, device_t child, int space)
159 device_printf(dev, "child %s requested pci_enable_io\n",
160 device_get_nameunit(child));
161 return (pci_enable_io(dev, space));
165 pci_hostb_disable_io(device_t dev, device_t child, int space)
168 device_printf(dev, "child %s requested pci_disable_io\n",
169 device_get_nameunit(child));
170 return (pci_disable_io(dev, space));
174 pci_hostb_set_powerstate(device_t dev, device_t child, int state)
177 device_printf(dev, "child %s requested pci_set_powerstate\n",
178 device_get_nameunit(child));
179 return (pci_set_powerstate(dev, state));
183 pci_hostb_get_powerstate(device_t dev, device_t child)
186 device_printf(dev, "child %s requested pci_get_powerstate\n",
187 device_get_nameunit(child));
188 return (pci_get_powerstate(dev));
192 pci_hostb_assign_interrupt(device_t dev, device_t child)
195 device_printf(dev, "child %s requested pci_assign_interrupt\n",
196 device_get_nameunit(child));
197 return (PCI_ASSIGN_INTERRUPT(device_get_parent(dev), dev));
201 pci_hostb_find_cap(device_t dev, device_t child, int capability,
205 return (pci_find_cap(dev, capability, capreg));
209 pci_hostb_find_next_cap(device_t dev, device_t child, int capability,
210 int start, int *capreg)
213 return (pci_find_next_cap(dev, capability, start, capreg));
217 pci_hostb_find_extcap(device_t dev, device_t child, int capability,
221 return (pci_find_extcap(dev, capability, capreg));
225 pci_hostb_find_next_extcap(device_t dev, device_t child, int capability,
226 int start, int *capreg)
229 return (pci_find_next_extcap(dev, capability, start, capreg));
233 pci_hostb_find_htcap(device_t dev, device_t child, int capability,
237 return (pci_find_htcap(dev, capability, capreg));
241 pci_hostb_find_next_htcap(device_t dev, device_t child, int capability,
242 int start, int *capreg)
245 return (pci_find_next_htcap(dev, capability, start, capreg));
248 static device_method_t pci_hostb_methods[] = {
249 /* Device interface */
250 DEVMETHOD(device_probe, pci_hostb_probe),
251 DEVMETHOD(device_attach, pci_hostb_attach),
252 DEVMETHOD(device_shutdown, bus_generic_shutdown),
253 DEVMETHOD(device_suspend, bus_generic_suspend),
254 DEVMETHOD(device_resume, bus_generic_resume),
257 DEVMETHOD(bus_read_ivar, pci_hostb_read_ivar),
258 DEVMETHOD(bus_write_ivar, pci_hostb_write_ivar),
259 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
260 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
262 DEVMETHOD(bus_alloc_resource, pci_hostb_alloc_resource),
263 DEVMETHOD(bus_release_resource, pci_hostb_release_resource),
264 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
265 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
268 DEVMETHOD(pci_read_config, pci_hostb_read_config),
269 DEVMETHOD(pci_write_config, pci_hostb_write_config),
270 DEVMETHOD(pci_enable_busmaster, pci_hostb_enable_busmaster),
271 DEVMETHOD(pci_disable_busmaster, pci_hostb_disable_busmaster),
272 DEVMETHOD(pci_enable_io, pci_hostb_enable_io),
273 DEVMETHOD(pci_disable_io, pci_hostb_disable_io),
274 DEVMETHOD(pci_get_powerstate, pci_hostb_get_powerstate),
275 DEVMETHOD(pci_set_powerstate, pci_hostb_set_powerstate),
276 DEVMETHOD(pci_assign_interrupt, pci_hostb_assign_interrupt),
277 DEVMETHOD(pci_find_cap, pci_hostb_find_cap),
278 DEVMETHOD(pci_find_next_cap, pci_hostb_find_next_cap),
279 DEVMETHOD(pci_find_extcap, pci_hostb_find_extcap),
280 DEVMETHOD(pci_find_next_extcap, pci_hostb_find_next_extcap),
281 DEVMETHOD(pci_find_htcap, pci_hostb_find_htcap),
282 DEVMETHOD(pci_find_next_htcap, pci_hostb_find_next_htcap),
287 static driver_t pci_hostb_driver = {
293 static devclass_t pci_hostb_devclass;
295 DRIVER_MODULE(hostb, pci, pci_hostb_driver, pci_hostb_devclass, 0, 0);