2 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
3 * Copyright (c) 2000, Michael Smith <msmith@freebsd.org>
4 * Copyright (c) 2000, BSDi
5 * Copyright (c) 2003, Thomas Moestl <tmm@FreeBSD.org>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
35 #include <sys/kernel.h>
36 #include <sys/libkern.h>
37 #include <sys/module.h>
38 #include <sys/pciio.h>
40 #include <dev/ofw/ofw_bus.h>
41 #include <dev/ofw/ofw_bus_subr.h>
42 #include <dev/ofw/ofw_pci.h>
43 #include <dev/ofw/openfirm.h>
45 #include <machine/bus.h>
46 #include <machine/intr_machdep.h>
47 #include <machine/resource.h>
49 #include <dev/pci/pcireg.h>
50 #include <dev/pci/pcivar.h>
51 #include <dev/pci/pci_private.h>
56 typedef uint32_t ofw_pci_intr_t;
59 static device_probe_t ofw_pcibus_probe;
60 static device_attach_t ofw_pcibus_attach;
61 static pci_assign_interrupt_t ofw_pcibus_assign_interrupt;
62 static ofw_bus_get_devinfo_t ofw_pcibus_get_devinfo;
63 static int ofw_pcibus_child_pnpinfo_str_method(device_t cbdev, device_t child,
64 char *buf, size_t buflen);
66 static void ofw_pcibus_enum_devtree(device_t dev, u_int domain, u_int busno);
67 static void ofw_pcibus_enum_bus(device_t dev, u_int domain, u_int busno);
69 static device_method_t ofw_pcibus_methods[] = {
70 /* Device interface */
71 DEVMETHOD(device_probe, ofw_pcibus_probe),
72 DEVMETHOD(device_attach, ofw_pcibus_attach),
75 DEVMETHOD(bus_child_pnpinfo_str, ofw_pcibus_child_pnpinfo_str_method),
78 DEVMETHOD(pci_assign_interrupt, ofw_pcibus_assign_interrupt),
80 /* ofw_bus interface */
81 DEVMETHOD(ofw_bus_get_devinfo, ofw_pcibus_get_devinfo),
82 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
83 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
84 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
85 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
86 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
91 struct ofw_pcibus_devinfo {
92 struct pci_devinfo opd_dinfo;
93 struct ofw_bus_devinfo opd_obdinfo;
96 static devclass_t pci_devclass;
98 DEFINE_CLASS_1(pci, ofw_pcibus_driver, ofw_pcibus_methods, 1 /* no softc */,
100 DRIVER_MODULE(ofw_pcibus, pcib, ofw_pcibus_driver, pci_devclass, 0, 0);
101 MODULE_VERSION(ofw_pcibus, 1);
102 MODULE_DEPEND(ofw_pcibus, pci, 1, 1, 1);
105 ofw_pcibus_probe(device_t dev)
108 if (ofw_bus_get_node(dev) == 0)
110 device_set_desc(dev, "OFW PCI bus");
116 ofw_pcibus_attach(device_t dev)
120 domain = pcib_get_domain(dev);
121 busno = pcib_get_bus(dev);
123 device_printf(dev, "domain=%d, physical bus=%d\n",
127 * Attach those children represented in the device tree.
130 ofw_pcibus_enum_devtree(dev, domain, busno);
133 * We now attach any laggard devices. FDT, for instance, allows
134 * the device tree to enumerate only some PCI devices. Apple's
135 * OF device tree on some Grackle-based hardware can also miss
136 * functions on multi-function cards.
139 ofw_pcibus_enum_bus(dev, domain, busno);
141 return (bus_generic_attach(dev));
145 ofw_pcibus_enum_devtree(device_t dev, u_int domain, u_int busno)
148 struct ofw_pci_register pcir;
149 struct ofw_pcibus_devinfo *dinfo;
150 phandle_t node, child;
154 pcib = device_get_parent(dev);
155 node = ofw_bus_get_node(dev);
157 for (child = OF_child(node); child != 0; child = OF_peer(child)) {
158 if (OF_getprop(child, "reg", &pcir, sizeof(pcir)) == -1)
160 slot = OFW_PCI_PHYS_HI_DEVICE(pcir.phys_hi);
161 func = OFW_PCI_PHYS_HI_FUNCTION(pcir.phys_hi);
163 /* Some OFW device trees contain dupes. */
164 if (pci_find_dbsf(domain, busno, slot, func) != NULL)
168 * The preset in the intline register is usually bogus. Reset
169 * it such that the PCI code will reroute the interrupt if
173 intline = PCI_INVALID_IRQ;
174 if (OF_getproplen(child, "interrupts") > 0)
176 PCIB_WRITE_CONFIG(pcib, busno, slot, func, PCIR_INTLINE,
180 * Now set up the PCI and OFW bus layer devinfo and add it
184 dinfo = (struct ofw_pcibus_devinfo *)pci_read_device(pcib,
185 domain, busno, slot, func, sizeof(*dinfo));
188 if (ofw_bus_gen_setup_devinfo(&dinfo->opd_obdinfo, child) !=
190 pci_freecfg((struct pci_devinfo *)dinfo);
193 pci_add_child(dev, (struct pci_devinfo *)dinfo);
196 * Some devices don't have an intpin set, but do have
197 * interrupts. These are fully specified, and set in the
198 * interrupts property, so add that value to the device's
201 if (dinfo->opd_dinfo.cfg.intpin == 0) {
202 ofw_pci_intr_t intr[2];
206 if (OF_getprop(child, "interrupts", &intr,
210 OF_getprop(child, "interrupt-parent", &iparent,
212 OF_getprop(iparent, "#interrupt-cells", &icells,
215 if (iparent != 0 && icells > 1) {
216 powerpc_config_intr(intr[0],
217 (intr[1] & 1) ? INTR_TRIGGER_LEVEL :
222 resource_list_add(&dinfo->opd_dinfo.resources,
223 SYS_RES_IRQ, 0, intr[0], intr[0], 1);
230 * The following is an almost exact clone of pci_add_children(), with the
231 * addition that it (a) will not add children that have already been added,
232 * and (b) will set up the OFW devinfo to point to invalid values. This is
233 * to handle non-enumerated PCI children as exist in FDT and on the second
234 * function of the Rage 128 in my Blue & White G3.
238 ofw_pcibus_enum_bus(device_t dev, u_int domain, u_int busno)
241 struct ofw_pcibus_devinfo *dinfo;
243 int s, f, pcifunchigh;
246 pcib = device_get_parent(dev);
248 maxslots = PCIB_MAXSLOTS(pcib);
249 for (s = 0; s <= maxslots; s++) {
253 hdrtype = PCIB_READ_CONFIG(pcib, busno, s, f, PCIR_HDRTYPE, 1);
254 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE)
256 if (hdrtype & PCIM_MFDEV)
257 pcifunchigh = PCI_FUNCMAX;
258 for (f = 0; f <= pcifunchigh; f++) {
259 /* Filter devices we have already added */
260 if (pci_find_dbsf(domain, busno, s, f) != NULL)
263 dinfo = (struct ofw_pcibus_devinfo *)pci_read_device(
264 pcib, domain, busno, s, f, sizeof(*dinfo));
266 dinfo->opd_obdinfo.obd_node = -1;
268 dinfo->opd_obdinfo.obd_name = NULL;
269 dinfo->opd_obdinfo.obd_compat = NULL;
270 dinfo->opd_obdinfo.obd_type = NULL;
271 dinfo->opd_obdinfo.obd_model = NULL;
272 pci_add_child(dev, (struct pci_devinfo *)dinfo);
279 ofw_pcibus_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
282 pci_child_pnpinfo_str_method(cbdev, child, buf, buflen);
284 if (ofw_bus_get_node(child) != -1) {
285 strlcat(buf, " ", buflen); /* Separate info */
286 ofw_bus_gen_child_pnpinfo_str(cbdev, child, buf, buflen);
293 ofw_pcibus_assign_interrupt(device_t dev, device_t child)
299 node = ofw_bus_get_node(child);
302 /* Non-firmware enumerated child, use standard routing */
305 * XXX: Right now we don't have anything sensible to do here,
306 * since the ofw_imap stuff relies on nodes have a reg
307 * property. There exists ways around this, so the ePAPR
308 * spec will need to be studied.
314 intr = pci_get_intpin(child);
315 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child,
321 * Any AAPL,interrupts property gets priority and is
322 * fully specified (i.e. does not need routing)
325 isz = OF_getprop(node, "AAPL,interrupts", &intr, sizeof(intr));
326 if (isz == sizeof(intr)) {
330 isz = OF_getprop(node, "interrupts", &intr, sizeof(intr));
331 if (isz != sizeof(intr)) {
332 /* No property; our best guess is the intpin. */
333 intr = pci_get_intpin(child);
337 * If we got intr from a property, it may or may not be an intpin.
338 * For on-board devices, it frequently is not, and is completely out
339 * of the valid intpin range. For PCI slots, it hopefully is,
340 * otherwise we will have trouble interfacing with non-OFW buses
342 * Since we cannot tell which it is without violating layering, we
343 * will always use the route_interrupt method, and treat exceptions
344 * on the level they become apparent.
346 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child, intr));
349 static const struct ofw_bus_devinfo *
350 ofw_pcibus_get_devinfo(device_t bus, device_t dev)
352 struct ofw_pcibus_devinfo *dinfo;
354 dinfo = device_get_ivars(dev);
355 return (&dinfo->opd_obdinfo);