FreeBSD/Linux Kernel Cross Reference
sys/i386/i386/geode.c
1 /*-
2 * Copyright (c) 2003 Poul-Henning Kamp
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 * 3. The names of the authors may not be used to endorse or promote
14 * products derived from this software without specific prior written
15 * permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: releng/5.2/sys/i386/i386/geode.c 119608 2003-08-31 16:20:34Z phk $");
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/timetc.h>
36 #include <sys/bus.h>
37 #include <sys/kernel.h>
38 #include <dev/pci/pcivar.h>
39
40 static unsigned cba;
41 static unsigned geode_counter;
42
43 static unsigned
44 geode_get_timecount(struct timecounter *tc)
45 {
46 return (inl(geode_counter));
47 }
48
49 static struct timecounter geode_timecounter = {
50 geode_get_timecount,
51 NULL,
52 0xffffffff,
53 27000000,
54 "Geode",
55 1000
56 };
57
58
59 static int
60 geode_probe(device_t self)
61 {
62
63 if (pci_get_devid(self) != 0x0515100b)
64 return (ENXIO);
65 if (geode_counter != 0)
66 return (ENXIO);
67 cba = pci_read_config(self, 0x64, 4);
68 printf("Geode CBA@ 0x%x\n", cba);
69 geode_counter = cba + 0x08;
70 outl(cba + 0x0d, 2);
71 tc_init(&geode_timecounter);
72 return (ENXIO);
73 }
74
75 static int
76 geode_attach(device_t self)
77 {
78
79 return(ENODEV);
80 }
81
82 static device_method_t geode_methods[] = {
83 /* Device interface */
84 DEVMETHOD(device_probe, geode_probe),
85 DEVMETHOD(device_attach, geode_attach),
86 DEVMETHOD(device_suspend, bus_generic_suspend),
87 DEVMETHOD(device_resume, bus_generic_resume),
88 DEVMETHOD(device_shutdown, bus_generic_shutdown),
89 {0, 0}
90 };
91
92 static driver_t geode_driver = {
93 "geode",
94 geode_methods,
95 0,
96 };
97
98 static devclass_t geode_devclass;
99
100 DRIVER_MODULE(geode, pci, geode_driver, geode_devclass, 0, 0);
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