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 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33
34 #include <sys/param.h>
35 #include <sys/kernel.h>
36 #include <sys/malloc.h>
37 #include <sys/module.h>
38 #include <sys/systm.h>
39 #include <sys/bus.h>
40
41 #include <dev/pci/pcivar.h>
42 #include <dev/pci/pcireg.h>
43
44 /*
45 * Chipset fixups.
46 *
47 * These routines are invoked during the probe phase for devices which
48 * typically don't have specific device drivers, but which require
49 * some cleaning up.
50 */
51
52 static int fixup_pci_probe(device_t dev);
53 static void fixwsc_natoma(device_t dev);
54
55 static device_method_t fixup_pci_methods[] = {
56 /* Device interface */
57 DEVMETHOD(device_probe, fixup_pci_probe),
58 DEVMETHOD(device_attach, bus_generic_attach),
59 { 0, 0 }
60 };
61
62 static driver_t fixup_pci_driver = {
63 "fixup_pci",
64 fixup_pci_methods,
65 0,
66 };
67
68 static devclass_t fixup_pci_devclass;
69
70 DRIVER_MODULE(fixup_pci, pci, fixup_pci_driver, fixup_pci_devclass, 0, 0);
71
72 static int
73 fixup_pci_probe(device_t dev)
74 {
75 switch (pci_get_devid(dev)) {
76 case 0x12378086: /* Intel 82440FX (Natoma) */
77 fixwsc_natoma(dev);
78 break;
79 }
80 return(ENXIO);
81 }
82
83 static void
84 fixwsc_natoma(device_t dev)
85 {
86 int pmccfg;
87
88 pmccfg = pci_read_config(dev, 0x50, 2);
89 #if defined(SMP)
90 if (pmccfg & 0x8000) {
91 printf("Correcting Natoma config for SMP\n");
92 pmccfg &= ~0x8000;
93 pci_write_config(dev, 0x50, pmccfg, 2);
94 }
95 #else
96 if ((pmccfg & 0x8000) == 0) {
97 printf("Correcting Natoma config for non-SMP\n");
98 pmccfg |= 0x8000;
99 pci_write_config(dev, 0x50, pmccfg, 2);
100 }
101 #endif
102 }
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