1 /*-
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>
6 * Copyright (c) 2009 by Marius Strobl <marius@FreeBSD.org>
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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.
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * from: FreeBSD: src/sys/dev/pci/pci_pci.c,v 1.3 2000/12/13
33 */
34
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD: stable/10/sys/sparc64/pci/ofw_pcib.c 247573 2013-03-01 20:34:02Z marius $");
37
38 #include "opt_ofw_pci.h"
39
40 #include <sys/param.h>
41 #include <sys/bus.h>
42 #include <sys/kernel.h>
43 #include <sys/libkern.h>
44 #include <sys/module.h>
45 #include <sys/rman.h>
46
47 #include <dev/ofw/ofw_bus.h>
48 #include <dev/ofw/openfirm.h>
49
50 #include <dev/pci/pcireg.h>
51 #include <dev/pci/pcivar.h>
52 #include <dev/pci/pcib_private.h>
53
54 #include "pcib_if.h"
55
56 #include <sparc64/pci/ofw_pci.h>
57 #include <sparc64/pci/ofw_pcib_subr.h>
58
59 #define PCI_DEVID_ALI_M5249 0x524910b9
60 #define PCI_VENDOR_PLX 0x10b5
61
62 static device_probe_t ofw_pcib_probe;
63 static device_attach_t ofw_pcib_attach;
64 static ofw_pci_setup_device_t ofw_pcib_setup_device;
65
66 static device_method_t ofw_pcib_methods[] = {
67 /* Device interface */
68 DEVMETHOD(device_probe, ofw_pcib_probe),
69 DEVMETHOD(device_attach, ofw_pcib_attach),
70
71 /* Bus interface */
72
73 /* pcib interface */
74 DEVMETHOD(pcib_route_interrupt, ofw_pcib_gen_route_interrupt),
75
76 /* ofw_bus interface */
77 DEVMETHOD(ofw_bus_get_node, ofw_pcib_gen_get_node),
78 DEVMETHOD(ofw_pci_setup_device, ofw_pcib_setup_device),
79
80 DEVMETHOD_END
81 };
82
83 static devclass_t pcib_devclass;
84
85 DEFINE_CLASS_1(pcib, ofw_pcib_driver, ofw_pcib_methods,
86 sizeof(struct ofw_pcib_gen_softc), pcib_driver);
87 EARLY_DRIVER_MODULE(ofw_pcib, pci, ofw_pcib_driver, pcib_devclass, NULL, NULL,
88 BUS_PASS_BUS);
89 MODULE_DEPEND(ofw_pcib, pci, 1, 1, 1);
90
91 static int
ofw_pcib_probe(device_t dev)92 ofw_pcib_probe(device_t dev)
93 {
94 char desc[sizeof("OFW PCIe-PCIe bridge")];
95 const char *dtype, *pbdtype;
96
97 #define ISDTYPE(dtype, type) \
98 (((dtype) != NULL) && strcmp((dtype), (type)) == 0)
99
100 if ((pci_get_class(dev) == PCIC_BRIDGE) &&
101 (pci_get_subclass(dev) == PCIS_BRIDGE_PCI) &&
102 ofw_bus_get_node(dev) != 0) {
103 dtype = ofw_bus_get_type(dev);
104 pbdtype = ofw_bus_get_type(device_get_parent(
105 device_get_parent(dev)));
106 snprintf(desc, sizeof(desc), "OFW PCI%s-PCI%s bridge",
107 ISDTYPE(pbdtype, OFW_TYPE_PCIE) ? "e" : "",
108 ISDTYPE(dtype, OFW_TYPE_PCIE) ? "e" : "");
109 device_set_desc_copy(dev, desc);
110 return (BUS_PROBE_DEFAULT);
111 }
112
113 #undef ISDTYPE
114
115 return (ENXIO);
116 }
117
118 static int
ofw_pcib_attach(device_t dev)119 ofw_pcib_attach(device_t dev)
120 {
121 struct ofw_pcib_gen_softc *sc;
122
123 sc = device_get_softc(dev);
124
125 switch (pci_get_devid(dev)) {
126 /*
127 * The ALi M5249 found in Fire-based machines by definition must me
128 * subtractive as they have a ISA bridge on their secondary side but
129 * don't indicate this in the class code although the ISA I/O range
130 * isn't included in their bridge decode.
131 */
132 case PCI_DEVID_ALI_M5249:
133 sc->ops_pcib_sc.flags |= PCIB_SUBTRACTIVE;
134 break;
135 }
136
137 switch (pci_get_vendor(dev)) {
138 /*
139 * Concurrently write the primary and secondary bus numbers in order
140 * to work around a bug in PLX PEX 8114 causing the internal shadow
141 * copies of these not to be updated when setting them bytewise.
142 */
143 case PCI_VENDOR_PLX:
144 pci_write_config(dev, PCIR_PRIBUS_1,
145 pci_read_config(dev, PCIR_SECBUS_1, 1) << 8 |
146 pci_read_config(dev, PCIR_PRIBUS_1, 1), 2);
147 break;
148 }
149
150 ofw_pcib_gen_setup(dev);
151 pcib_attach_common(dev);
152 device_add_child(dev, "pci", -1);
153 return (bus_generic_attach(dev));
154 }
155
156 static void
ofw_pcib_setup_device(device_t bus,device_t child)157 ofw_pcib_setup_device(device_t bus, device_t child)
158 {
159 int i;
160 uint16_t reg;
161
162 switch (pci_get_vendor(bus)) {
163 /*
164 * For PLX PEX 8532 issue 64 TLPs to the child from the downstream
165 * port to the child device in order to work around a hardware bug.
166 */
167 case PCI_VENDOR_PLX:
168 for (i = 0, reg = 0; i < 64; i++)
169 reg |= pci_get_devid(child);
170 break;
171 }
172
173 OFW_PCI_SETUP_DEVICE(device_get_parent(bus), child);
174 }
175