1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
/* $OpenBSD: geodesc.c,v 1.7 2006/10/17 21:28:23 tom Exp $ */
/*
* Copyright (c) 2003 Markus Friedl <markus@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Geode SC1100 Information Appliance On a Chip
* http://www.national.com/ds.cgi/SC/SC1100.pdf
*/
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#ifdef __HAVE_TIMECOUNTER
#include <sys/timetc.h>
#endif
#include <machine/bus.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <arch/i386/pci/geodescreg.h>
struct geodesc_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
};
int geodesc_match(struct device *, void *, void *);
void geodesc_attach(struct device *, struct device *, void *);
int geodesc_wdogctl_cb(void *, int);
void sc1100_sysreset(void);
struct cfattach geodesc_ca = {
sizeof(struct geodesc_softc), geodesc_match, geodesc_attach
};
struct cfdriver geodesc_cd = {
NULL, "geodesc", DV_DULL
};
#ifdef __HAVE_TIMECOUNTER
u_int geodesc_get_timecount(struct timecounter *tc);
struct timecounter geodesc_timecounter = {
geodesc_get_timecount, /* get_timecount */
0, /* no poll_pps */
0xffffffff, /* counter_mask */
27000000, /* frequency */
"GEOTSC", /* name */
2000 /* quality */
};
#endif /* __HAVE_TIMECOUNTER */
int
geodesc_match(struct device *parent, void *match, void *aux)
{
struct pci_attach_args *pa = aux;
if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_NS &&
(PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_NS_SC1100_XBUS ||
PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_NS_SCx200_XBUS))
return (1);
return (0);
}
#define WDSTSBITS "\20\x04WDRST\x03WDSMI\x02WDINT\x01WDOVF"
void
geodesc_attach(struct device *parent, struct device *self, void *aux)
{
struct geodesc_softc *sc = (void *) self;
struct pci_attach_args *pa = aux;
uint16_t cnfg, cba;
uint8_t sts, rev, iid;
pcireg_t reg;
extern void (*cpuresetfn)(void);
reg = pci_conf_read(pa->pa_pc, pa->pa_tag, SC1100_F5_SCRATCHPAD);
sc->sc_iot = pa->pa_iot;
if (bus_space_map(sc->sc_iot, reg, 64, 0, &sc->sc_ioh)) {
printf(": unable to map registers at 0x%x\n", reg);
return;
}
cba = bus_space_read_2(sc->sc_iot, sc->sc_ioh, GCB_CBA);
if (cba != reg) {
printf(": cba mismatch: cba 0x%x != reg 0x%x\n", cba, reg);
bus_space_unmap(sc->sc_iot, sc->sc_ioh, 64);
return;
}
sts = bus_space_read_1(sc->sc_iot, sc->sc_ioh, GCB_WDSTS);
cnfg = bus_space_read_2(sc->sc_iot, sc->sc_ioh, GCB_WDCNFG);
iid = bus_space_read_1(sc->sc_iot, sc->sc_ioh, GCB_IID);
rev = bus_space_read_1(sc->sc_iot, sc->sc_ioh, GCB_REV);
printf(": iid %d revision %d wdstatus %b\n", iid, rev, sts, WDSTSBITS);
/* setup and register watchdog */
bus_space_write_2(sc->sc_iot, sc->sc_ioh, GCB_WDTO, 0);
sts |= WDOVF_CLEAR;
bus_space_write_1(sc->sc_iot, sc->sc_ioh, GCB_WDSTS, sts);
cnfg &= ~WDCNFG_MASK;
cnfg |= WDTYPE1_RESET|WDPRES_DIV_512;
bus_space_write_2(sc->sc_iot, sc->sc_ioh, GCB_WDCNFG, cnfg);
wdog_register(sc, geodesc_wdogctl_cb);
#ifdef __HAVE_TIMECOUNTER
bus_space_write_4(sc->sc_iot, sc->sc_ioh, GCB_TSCNFG, TSC_ENABLE);
/* Hook into the kern_tc */
geodesc_timecounter.tc_priv = sc;
tc_init(&geodesc_timecounter);
#endif /* __HAVE_TIMECOUNTER */
/* We have a special way to reset the CPU on the SC1100 */
cpuresetfn = sc1100_sysreset;
}
int
geodesc_wdogctl_cb(void *self, int period)
{
struct geodesc_softc *sc = self;
if (period > 0x03ff)
period = 0x03ff;
bus_space_write_2(sc->sc_iot, sc->sc_ioh, GCB_WDTO, period * 64);
return (period);
}
#ifdef __HAVE_TIMECOUNTER
u_int
geodesc_get_timecount(struct timecounter *tc)
{
struct geodesc_softc *sc = tc->tc_priv;
return (bus_space_read_4(sc->sc_iot, sc->sc_ioh, GCB_TSC));
}
#endif /* __HAVE_TIMECOUNTER */
void
sc1100_sysreset(void)
{
/*
* Reset AMD Geode SC1100.
*
* 1) Write PCI Configuration Address Register (0xcf8) to
* select Function 0, Register 0x44: Bridge Configuration,
* GPIO and LPC Configuration Register Space, Reset
* Control Register.
*
* 2) Write 0xf to PCI Configuration Data Register (0xcfc)
* to reset IDE controller, IDE bus, and PCI bus, and
* to trigger a system-wide reset.
*
* See AMD Geode SC1100 Processor Data Book, Revision 2.0,
* sections 6.3.1, 6.3.2, and 6.4.1.
*/
outl(0xCF8, 0x80009044UL);
outb(0xCFC, 0x0F);
}
|
