Bring in YONETANI Tomokazu's acpi-update-2.patch (27-May-2004), a major
[dragonfly.git] / sys / dev / acpica5 / acpi_pcib_acpi.c
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1/*-
2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2000 BSDi
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
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27 * $FreeBSD: src/sys/dev/acpica/acpi_pcib_acpi.c,v 1.32 2004/04/09 18:14:32 njl Exp $
28 * $DragonFly: src/sys/dev/acpica5/acpi_pcib_acpi.c,v 1.2 2004/06/27 08:52:39 dillon Exp $
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29 */
30#include "opt_acpi.h"
31#include <sys/param.h>
32#include <sys/bus.h>
33#include <sys/malloc.h>
34#include <sys/kernel.h>
35
36#include "acpi.h"
37
38#include "acpivar.h"
39
40#include <machine/pci_cfgreg.h>
41#include <bus/pci/pcivar.h>
42#include <bus/pci/pcib_private.h>
43#include "pcib_if.h"
44
45#include "acpi_pcibvar.h"
46
47/*
48 * Hooks for the ACPI CA debugging infrastructure
49 */
50#define _COMPONENT ACPI_BUS
51ACPI_MODULE_NAME("PCI_ACPI")
52
53struct acpi_hpcib_softc {
54 device_t ap_dev;
55 ACPI_HANDLE ap_handle;
56
57 int ap_segment; /* analagous to Alpha 'hose' */
58 int ap_bus; /* bios-assigned bus number */
59
60 ACPI_BUFFER ap_prt; /* interrupt routing table */
61};
62
63
64static int acpi_pcib_acpi_probe(device_t bus);
65static int acpi_pcib_acpi_attach(device_t bus);
66static int acpi_pcib_acpi_resume(device_t bus);
67static int acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result);
68static int acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value);
69static u_int32_t acpi_pcib_read_config(device_t dev, int bus, int slot, int func, int reg, int bytes);
70static void acpi_pcib_write_config(device_t dev, int bus, int slot, int func, int reg,
71 u_int32_t data, int bytes);
72static int acpi_pcib_acpi_route_interrupt(device_t pcib,
73 device_t dev, int pin);
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74static struct resource *acpi_pcib_acpi_alloc_resource(device_t dev,
75 device_t child, int type, int *rid,
76 u_long start, u_long end, u_long count,
77 u_int flags);
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78
79static device_method_t acpi_pcib_acpi_methods[] = {
80 /* Device interface */
81 DEVMETHOD(device_probe, acpi_pcib_acpi_probe),
82 DEVMETHOD(device_attach, acpi_pcib_acpi_attach),
83 DEVMETHOD(device_shutdown, bus_generic_shutdown),
84 DEVMETHOD(device_suspend, bus_generic_suspend),
85 DEVMETHOD(device_resume, acpi_pcib_acpi_resume),
86
87 /* Bus interface */
88 DEVMETHOD(bus_print_child, bus_generic_print_child),
89 DEVMETHOD(bus_read_ivar, acpi_pcib_read_ivar),
90 DEVMETHOD(bus_write_ivar, acpi_pcib_write_ivar),
f9d8cd12 91 DEVMETHOD(bus_alloc_resource, acpi_pcib_acpi_alloc_resource),
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92 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
93 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
94 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
95 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
96 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
97
98 /* pcib interface */
99 DEVMETHOD(pcib_maxslots, pcib_maxslots),
100 DEVMETHOD(pcib_read_config, acpi_pcib_read_config),
101 DEVMETHOD(pcib_write_config, acpi_pcib_write_config),
102 DEVMETHOD(pcib_route_interrupt, acpi_pcib_acpi_route_interrupt),
103
104 {0, 0}
105};
106
107static driver_t acpi_pcib_acpi_driver = {
108 "pcib",
109 acpi_pcib_acpi_methods,
110 sizeof(struct acpi_hpcib_softc),
111};
112
113DRIVER_MODULE(acpi_pcib, acpi, acpi_pcib_acpi_driver, pcib_devclass, 0, 0);
f9d8cd12 114MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
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115
116static int
117acpi_pcib_acpi_probe(device_t dev)
118{
119
120 if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) &&
121 !acpi_disabled("pci") &&
122 acpi_MatchHid(dev, "PNP0A03")) {
123
124 if (!pci_cfgregopen())
125 return(ENXIO);
126
127 /*
128 * Set device description
129 */
130 device_set_desc(dev, "ACPI Host-PCI bridge");
131 return(0);
132 }
133 return(ENXIO);
134}
135
136static int
137acpi_pcib_acpi_attach(device_t dev)
138{
139 struct acpi_hpcib_softc *sc;
140 ACPI_STATUS status;
141 u_int addr, slot, func, busok;
142 uint8_t busno;
143
144 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
145
146 sc = device_get_softc(dev);
147 sc->ap_dev = dev;
148 sc->ap_handle = acpi_get_handle(dev);
149
150 /*
151 * Get our base bus number by evaluating _BBN.
152 * If this doesn't work, we assume we're bus number 0.
153 *
154 * XXX note that it may also not exist in the case where we are
155 * meant to use a private configuration space mechanism for this bus,
156 * so we should dig out our resources and check to see if we have
157 * anything like that. How do we do this?
158 * XXX If we have the requisite information, and if we don't think the
159 * default PCI configuration space handlers can deal with this bus,
160 * we should attach our own handler.
161 * XXX invoke _REG on this for the PCI config space address space?
162 * XXX It seems many BIOS's with multiple Host-PCI bridges do not set
163 * _BBN correctly. They set _BBN to zero for all bridges. Thus,
164 * if _BBN is zero and pcib0 already exists, we try to read our
165 * bus number from the configuration registers at address _ADR.
166 */
f9d8cd12 167 status = acpi_GetInteger(sc->ap_handle, "_BBN", &sc->ap_bus);
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168 if (ACPI_FAILURE(status)) {
169 if (status != AE_NOT_FOUND) {
170 device_printf(dev, "could not evaluate _BBN - %s\n",
171 AcpiFormatException(status));
172 return_VALUE(ENXIO);
173 } else {
174 /* if it's not found, assume 0 */
175 sc->ap_bus = 0;
176 }
177 }
178
179 /*
180 * If the bus is zero and pcib0 already exists, read the bus number
181 * via PCI config space.
182 */
183 busok = 1;
184 if (sc->ap_bus == 0 && devclass_get_device(pcib_devclass, 0) != dev) {
185 busok = 0;
f9d8cd12 186 status = acpi_GetInteger(sc->ap_handle, "_ADR", &addr);
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187 if (ACPI_FAILURE(status)) {
188 if (status != AE_NOT_FOUND) {
189 device_printf(dev, "could not evaluate _ADR - %s\n",
190 AcpiFormatException(status));
191 return_VALUE(ENXIO);
192 } else
193 device_printf(dev, "could not determine config space address\n");
194 } else {
195 /* XXX: We assume bus 0. */
196 slot = addr >> 16;
197 func = addr & 0xffff;
198 if (bootverbose)
199 device_printf(dev, "reading config registers from 0:%d:%d\n",
200 slot, func);
201 if (host_pcib_get_busno(pci_cfgregread, 0, slot, func, &busno) == 0)
202 device_printf(dev, "could not read bus number from config space\n");
203 else {
204 sc->ap_bus = busno;
205 busok = 1;
206 }
207 }
208 }
209
210 /*
211 * If nothing else worked, hope that ACPI at least lays out the
212 * host-PCI bridges in order and that as a result our unit number
213 * is actually our bus number. There are several reasons this
214 * might not be true.
215 */
216 if (busok == 0) {
217 sc->ap_bus = device_get_unit(dev);
218 device_printf(dev, "trying bus number %d\n", sc->ap_bus);
219 }
220
221 /*
222 * Get our segment number by evaluating _SEG
223 * It's OK for this to not exist.
224 */
f9d8cd12 225 if (ACPI_FAILURE(status = acpi_GetInteger(sc->ap_handle, "_SEG", &sc->ap_segment))) {
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226 if (status != AE_NOT_FOUND) {
227 device_printf(dev, "could not evaluate _SEG - %s\n", AcpiFormatException(status));
228 return_VALUE(ENXIO);
229 }
230 /* if it's not found, assume 0 */
231 sc->ap_segment = 0;
232 }
233
234 return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_bus));
235}
236
237static int
238acpi_pcib_acpi_resume(device_t dev)
239{
240 struct acpi_hpcib_softc *sc = device_get_softc(dev);
241
242 return (acpi_pcib_resume(dev, &sc->ap_prt, sc->ap_bus));
243}
244
245/*
246 * Support for standard PCI bridge ivars.
247 */
248static int
249acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
250{
251 struct acpi_hpcib_softc *sc = device_get_softc(dev);
252
253 switch (which) {
254 case PCIB_IVAR_BUS:
255 *result = sc->ap_bus;
256 return(0);
257 case ACPI_IVAR_HANDLE:
258 *result = (uintptr_t)sc->ap_handle;
259 return(0);
260 }
261 return(ENOENT);
262}
263
264static int
265acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
266{
267 struct acpi_hpcib_softc *sc = device_get_softc(dev);
268
269 switch (which) {
270 case PCIB_IVAR_BUS:
271 sc->ap_bus = value;
272 return(0);
273 }
274 return(ENOENT);
275}
276
277static u_int32_t
278acpi_pcib_read_config(device_t dev, int bus, int slot, int func, int reg, int bytes)
279{
280 return(pci_cfgregread(bus, slot, func, reg, bytes));
281}
282
283static void
284acpi_pcib_write_config(device_t dev, int bus, int slot, int func, int reg, u_int32_t data, int bytes)
285{
286 pci_cfgregwrite(bus, slot, func, reg, data, bytes);
287}
288
289static int
290acpi_pcib_acpi_route_interrupt(device_t pcib, device_t dev, int pin)
291{
292 struct acpi_hpcib_softc *sc;
293
294 /* find the bridge softc */
295 sc = device_get_softc(pcib);
296 return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
297}
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298
299struct resource *
300acpi_pcib_acpi_alloc_resource(device_t dev, device_t child, int type, int *rid,
301 u_long start, u_long end, u_long count, u_int flags)
302{
303 /*
304 * If no memory preference is given, use upper 256MB slot most
305 * bioses use for their memory window. Typically other bridges
306 * before us get in the way to assert their preferences on memory.
307 * Hardcoding like this sucks, so a more MD/MI way needs to be
308 * found to do it.
309 */
310 if (type == SYS_RES_MEMORY && start == 0UL && end == ~0UL)
311 start = 0xf0000000;
312 return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
313 count, flags));
314}