2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2011 Nathan Whitehorn
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
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 AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/module.h>
36 #include <sys/kernel.h>
39 #include <dev/ofw/openfirm.h>
40 #include <dev/ofw/ofw_pci.h>
41 #include <dev/ofw/ofw_bus.h>
42 #include <dev/ofw/ofw_bus_subr.h>
43 #include <dev/ofw/ofwpci.h>
45 #include <dev/pci/pcivar.h>
46 #include <dev/pci/pcireg.h>
48 #include <machine/bus.h>
49 #include <machine/intr_machdep.h>
50 #include <machine/md_var.h>
51 #include <machine/pio.h>
52 #include <machine/resource.h>
53 #include <machine/rtas.h>
58 #include <powerpc/pseries/plpar_iommu.h>
66 static int rtaspci_probe(device_t);
67 static int rtaspci_attach(device_t);
72 static u_int32_t rtaspci_read_config(device_t, u_int, u_int, u_int,
74 static void rtaspci_write_config(device_t, u_int, u_int, u_int,
75 u_int, u_int32_t, int);
80 static device_method_t rtaspci_methods[] = {
81 /* Device interface */
82 DEVMETHOD(device_probe, rtaspci_probe),
83 DEVMETHOD(device_attach, rtaspci_attach),
86 DEVMETHOD(pcib_read_config, rtaspci_read_config),
87 DEVMETHOD(pcib_write_config, rtaspci_write_config),
92 struct rtaspci_softc {
93 struct ofw_pci_softc pci_sc;
95 struct ofw_pci_register sc_pcir;
97 cell_t read_pci_config, write_pci_config;
98 cell_t ex_read_pci_config, ex_write_pci_config;
99 int sc_extended_config;
102 static devclass_t rtaspci_devclass;
103 DEFINE_CLASS_1(pcib, rtaspci_driver, rtaspci_methods,
104 sizeof(struct rtaspci_softc), ofw_pci_driver);
105 DRIVER_MODULE(rtaspci, ofwbus, rtaspci_driver, rtaspci_devclass, 0, 0);
108 rtaspci_probe(device_t dev)
115 type = ofw_bus_get_type(dev);
117 if (OF_getproplen(ofw_bus_get_node(dev), "used-by-rtas") < 0)
119 if (type == NULL || strcmp(type, "pci") != 0)
122 device_set_desc(dev, "RTAS Host-PCI bridge");
123 return (BUS_PROBE_GENERIC);
127 rtaspci_attach(device_t dev)
129 struct rtaspci_softc *sc;
131 sc = device_get_softc(dev);
133 if (OF_getencprop(ofw_bus_get_node(dev), "reg", (pcell_t *)&sc->sc_pcir,
134 sizeof(sc->sc_pcir)) == -1)
137 sc->read_pci_config = rtas_token_lookup("read-pci-config");
138 sc->write_pci_config = rtas_token_lookup("write-pci-config");
139 sc->ex_read_pci_config = rtas_token_lookup("ibm,read-pci-config");
140 sc->ex_write_pci_config = rtas_token_lookup("ibm,write-pci-config");
142 sc->sc_extended_config = 0;
143 OF_getencprop(ofw_bus_get_node(dev), "ibm,pci-config-space-type",
144 &sc->sc_extended_config, sizeof(sc->sc_extended_config));
146 return (ofw_pci_attach(dev));
150 rtaspci_read_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg,
153 struct rtaspci_softc *sc;
154 uint32_t retval = 0xffffffff;
155 uint32_t config_addr;
158 sc = device_get_softc(dev);
160 config_addr = ((bus & 0xff) << 16) | ((slot & 0x1f) << 11) |
161 ((func & 0x7) << 8) | (reg & 0xff);
162 if (sc->sc_extended_config)
163 config_addr |= (reg & 0xf00) << 16;
165 if (sc->ex_read_pci_config != -1)
166 error = rtas_call_method(sc->ex_read_pci_config, 4, 2,
167 config_addr, sc->sc_pcir.phys_hi,
168 sc->sc_pcir.phys_mid, width, &pcierror, &retval);
170 error = rtas_call_method(sc->read_pci_config, 2, 2,
171 config_addr, width, &pcierror, &retval);
173 /* Sign-extend output */
176 retval = (int32_t)(int8_t)(retval);
179 retval = (int32_t)(int16_t)(retval);
183 if (error < 0 || pcierror != 0)
190 rtaspci_write_config(device_t dev, u_int bus, u_int slot, u_int func,
191 u_int reg, uint32_t val, int width)
193 struct rtaspci_softc *sc;
194 uint32_t config_addr;
197 sc = device_get_softc(dev);
199 config_addr = ((bus & 0xff) << 16) | ((slot & 0x1f) << 11) |
200 ((func & 0x7) << 8) | (reg & 0xff);
201 if (sc->sc_extended_config)
202 config_addr |= (reg & 0xf00) << 16;
204 if (sc->ex_write_pci_config != -1)
205 rtas_call_method(sc->ex_write_pci_config, 5, 1, config_addr,
206 sc->sc_pcir.phys_hi, sc->sc_pcir.phys_mid,
207 width, val, &pcierror);
209 rtas_call_method(sc->write_pci_config, 3, 1, config_addr,
210 width, val, &pcierror);