2 * Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier
3 * Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
4 * Copyright (c) 2000 BSDi
5 * Copyright (c) 2001, 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, this list of conditions and the following disclaimer.
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.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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31 * from: FreeBSD: src/sys/dev/pci/pci_pci.c,v 1.3 2000/12/13
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
38 * Support for the Sun APB (Advanced PCI Bridge) PCI-PCI bridge.
39 * This bridge does not fully comply to the PCI bridge specification, and is
40 * therefore not supported by the generic driver.
41 * We can use some of the pcib methods anyway.
44 #include "opt_ofw_pci.h"
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/kernel.h>
49 #include <sys/module.h>
52 #include <dev/ofw/ofw_bus.h>
53 #include <dev/ofw/openfirm.h>
55 #include <machine/bus.h>
56 #include <machine/resource.h>
58 #include <dev/pci/pcireg.h>
59 #include <dev/pci/pcivar.h>
60 #include <dev/pci/pcib_private.h>
64 #include <sparc64/pci/ofw_pci.h>
65 #include <sparc64/pci/ofw_pcib_subr.h>
68 * Bridge-specific data.
71 struct ofw_pcib_gen_softc sc_bsc;
76 static device_probe_t apb_probe;
77 static device_attach_t apb_attach;
78 static bus_alloc_resource_t apb_alloc_resource;
80 static device_method_t apb_methods[] = {
81 /* Device interface */
82 DEVMETHOD(device_probe, apb_probe),
83 DEVMETHOD(device_attach, apb_attach),
84 DEVMETHOD(device_shutdown, bus_generic_shutdown),
85 DEVMETHOD(device_suspend, bus_generic_suspend),
86 DEVMETHOD(device_resume, bus_generic_resume),
89 DEVMETHOD(bus_print_child, bus_generic_print_child),
90 DEVMETHOD(bus_read_ivar, pcib_read_ivar),
91 DEVMETHOD(bus_write_ivar, pcib_write_ivar),
92 DEVMETHOD(bus_alloc_resource, apb_alloc_resource),
93 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
94 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
95 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
96 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
97 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
100 DEVMETHOD(pcib_maxslots, pcib_maxslots),
101 DEVMETHOD(pcib_read_config, pcib_read_config),
102 DEVMETHOD(pcib_write_config, pcib_write_config),
103 DEVMETHOD(pcib_route_interrupt, ofw_pcib_gen_route_interrupt),
105 /* ofw_bus interface */
106 DEVMETHOD(ofw_bus_get_node, ofw_pcib_gen_get_node),
111 static devclass_t pcib_devclass;
113 DEFINE_CLASS_0(pcib, apb_driver, apb_methods, sizeof(struct apb_softc));
114 DRIVER_MODULE(apb, pci, apb_driver, pcib_devclass, 0, 0);
116 /* APB specific registers */
117 #define APBR_IOMAP 0xde
118 #define APBR_MEMMAP 0xdf
120 /* Definitions for the mapping registers */
121 #define APB_IO_SCALE 0x200000
122 #define APB_MEM_SCALE 0x20000000
125 * Generic device interface
128 apb_probe(device_t dev)
131 if (pci_get_vendor(dev) == 0x108e && /* Sun */
132 pci_get_device(dev) == 0x5000) { /* APB */
133 device_set_desc(dev, "APB PCI-PCI bridge");
140 apb_map_print(uint8_t map, u_long scale)
144 for (first = 1, i = 0; i < 8; i++) {
145 if ((map & (1 << i)) != 0) {
146 printf("%s0x%lx-0x%lx", first ? "" : ", ",
147 i * scale, (i + 1) * scale - 1);
154 apb_checkrange(uint8_t map, u_long scale, u_long start, u_long end)
163 if ((map & (1 << i)) == 0)
169 apb_attach(device_t dev)
171 struct apb_softc *sc;
173 sc = device_get_softc(dev);
176 * Get current bridge configuration.
178 sc->sc_bsc.ops_pcib_sc.domain = pci_get_domain(dev);
179 sc->sc_bsc.ops_pcib_sc.secbus =
180 pci_read_config(dev, PCIR_SECBUS_1, 1);
181 sc->sc_bsc.ops_pcib_sc.subbus =
182 pci_read_config(dev, PCIR_SUBBUS_1, 1);
183 sc->sc_iomap = pci_read_config(dev, APBR_IOMAP, 1);
184 sc->sc_memmap = pci_read_config(dev, APBR_MEMMAP, 1);
185 ofw_pcib_gen_setup(dev);
188 device_printf(dev, " domain %d\n",
189 sc->sc_bsc.ops_pcib_sc.domain);
190 device_printf(dev, " secondary bus %d\n",
191 sc->sc_bsc.ops_pcib_sc.secbus);
192 device_printf(dev, " subordinate bus %d\n",
193 sc->sc_bsc.ops_pcib_sc.subbus);
194 device_printf(dev, " I/O decode ");
195 apb_map_print(sc->sc_iomap, APB_IO_SCALE);
197 device_printf(dev, " memory decode ");
198 apb_map_print(sc->sc_memmap, APB_MEM_SCALE);
202 device_add_child(dev, "pci", -1);
203 return (bus_generic_attach(dev));
207 * We have to trap resource allocation requests and ensure that the bridge
208 * is set up to, or capable of handling them.
210 static struct resource *
211 apb_alloc_resource(device_t dev, device_t child, int type, int *rid,
212 u_long start, u_long end, u_long count, u_int flags)
214 struct apb_softc *sc;
216 sc = device_get_softc(dev);
219 * If this is a "default" allocation against this rid, we can't work
220 * out where it's coming from (we should actually never see these) so
221 * we just have to punt.
223 if (start == 0 && end == ~0) {
224 device_printf(dev, "can't decode default resource id %d for "
225 "%s%d, bypassing\n", *rid, device_get_name(child),
226 device_get_unit(child));
231 * Fail the allocation for this range if it's not supported.
232 * XXX we should probably just fix up the bridge decode and
237 if (!apb_checkrange(sc->sc_iomap, APB_IO_SCALE, start, end)) {
238 device_printf(dev, "device %s%d requested unsupported "
239 "I/O range 0x%lx-0x%lx\n", device_get_name(child),
240 device_get_unit(child), start, end);
244 device_printf(sc->sc_bsc.ops_pcib_sc.dev, "device "
245 "%s%d requested decoded I/O range 0x%lx-0x%lx\n",
246 device_get_name(child), device_get_unit(child),
251 if (!apb_checkrange(sc->sc_memmap, APB_MEM_SCALE, start, end)) {
252 device_printf(dev, "device %s%d requested unsupported "
253 "memory range 0x%lx-0x%lx\n",
254 device_get_name(child), device_get_unit(child),
259 device_printf(sc->sc_bsc.ops_pcib_sc.dev, "device "
260 "%s%d requested decoded memory range 0x%lx-0x%lx\n",
261 device_get_name(child), device_get_unit(child),
271 * Bridge is OK decoding this resource, so pass it up.
273 return (bus_generic_alloc_resource(dev, child, type, rid, start, end,