2 * Copyright (c) 2011 Nathan Whitehorn
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/module.h>
34 #include <sys/kernel.h>
37 #include <dev/ofw/openfirm.h>
38 #include <dev/ofw/ofw_pci.h>
39 #include <dev/ofw/ofw_bus.h>
40 #include <dev/ofw/ofw_bus_subr.h>
41 #include <dev/ofw/ofwpci.h>
43 #include <dev/pci/pcivar.h>
44 #include <dev/pci/pcireg.h>
46 #include <machine/bus.h>
47 #include <machine/intr_machdep.h>
48 #include <machine/md_var.h>
49 #include <machine/pio.h>
50 #include <machine/resource.h>
51 #include <machine/rtas.h>
56 #include <powerpc/pseries/plpar_iommu.h>
64 static int rtaspci_probe(device_t);
65 static int rtaspci_attach(device_t);
70 static u_int32_t rtaspci_read_config(device_t, u_int, u_int, u_int,
72 static void rtaspci_write_config(device_t, u_int, u_int, u_int,
73 u_int, u_int32_t, int);
78 static device_method_t rtaspci_methods[] = {
79 /* Device interface */
80 DEVMETHOD(device_probe, rtaspci_probe),
81 DEVMETHOD(device_attach, rtaspci_attach),
84 DEVMETHOD(pcib_read_config, rtaspci_read_config),
85 DEVMETHOD(pcib_write_config, rtaspci_write_config),
90 struct rtaspci_softc {
91 struct ofw_pci_softc pci_sc;
93 struct ofw_pci_register sc_pcir;
95 cell_t read_pci_config, write_pci_config;
96 cell_t ex_read_pci_config, ex_write_pci_config;
97 int sc_extended_config;
100 static devclass_t rtaspci_devclass;
101 DEFINE_CLASS_1(pcib, rtaspci_driver, rtaspci_methods,
102 sizeof(struct rtaspci_softc), ofw_pci_driver);
103 DRIVER_MODULE(rtaspci, ofwbus, rtaspci_driver, rtaspci_devclass, 0, 0);
106 rtaspci_probe(device_t dev)
113 type = ofw_bus_get_type(dev);
115 if (OF_getproplen(ofw_bus_get_node(dev), "used-by-rtas") < 0)
117 if (type == NULL || strcmp(type, "pci") != 0)
120 device_set_desc(dev, "RTAS Host-PCI bridge");
121 return (BUS_PROBE_GENERIC);
125 rtaspci_attach(device_t dev)
127 struct rtaspci_softc *sc;
129 sc = device_get_softc(dev);
131 if (OF_getencprop(ofw_bus_get_node(dev), "reg", (pcell_t *)&sc->sc_pcir,
132 sizeof(sc->sc_pcir)) == -1)
135 sc->read_pci_config = rtas_token_lookup("read-pci-config");
136 sc->write_pci_config = rtas_token_lookup("write-pci-config");
137 sc->ex_read_pci_config = rtas_token_lookup("ibm,read-pci-config");
138 sc->ex_write_pci_config = rtas_token_lookup("ibm,write-pci-config");
140 sc->sc_extended_config = 0;
141 OF_getencprop(ofw_bus_get_node(dev), "ibm,pci-config-space-type",
142 &sc->sc_extended_config, sizeof(sc->sc_extended_config));
144 return (ofw_pci_attach(dev));
148 rtaspci_read_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg,
151 struct rtaspci_softc *sc;
152 uint32_t retval = 0xffffffff;
153 uint32_t config_addr;
156 sc = device_get_softc(dev);
158 config_addr = ((bus & 0xff) << 16) | ((slot & 0x1f) << 11) |
159 ((func & 0x7) << 8) | (reg & 0xff);
160 if (sc->sc_extended_config)
161 config_addr |= (reg & 0xf00) << 16;
163 if (sc->ex_read_pci_config != -1)
164 error = rtas_call_method(sc->ex_read_pci_config, 4, 2,
165 config_addr, sc->sc_pcir.phys_hi,
166 sc->sc_pcir.phys_mid, width, &pcierror, &retval);
168 error = rtas_call_method(sc->read_pci_config, 2, 2,
169 config_addr, width, &pcierror, &retval);
171 /* Sign-extend output */
174 retval = (int32_t)(int8_t)(retval);
177 retval = (int32_t)(int16_t)(retval);
181 if (error < 0 || pcierror != 0)
188 rtaspci_write_config(device_t dev, u_int bus, u_int slot, u_int func,
189 u_int reg, uint32_t val, int width)
191 struct rtaspci_softc *sc;
192 uint32_t config_addr;
195 sc = device_get_softc(dev);
197 config_addr = ((bus & 0xff) << 16) | ((slot & 0x1f) << 11) |
198 ((func & 0x7) << 8) | (reg & 0xff);
199 if (sc->sc_extended_config)
200 config_addr |= (reg & 0xf00) << 16;
202 if (sc->ex_write_pci_config != -1)
203 rtas_call_method(sc->ex_write_pci_config, 5, 1, config_addr,
204 sc->sc_pcir.phys_hi, sc->sc_pcir.phys_mid,
205 width, val, &pcierror);
207 rtas_call_method(sc->write_pci_config, 3, 1, config_addr,
208 width, val, &pcierror);