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
|
/* $OpenBSD: syscon.c,v 1.4 2018/03/17 18:04:15 kettenis Exp $ */
/*
* Copyright (c) 2017 Mark Kettenis
*
* 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <machine/fdt.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_misc.h>
#include <dev/ofw/fdt.h>
#ifdef __armv7__
#include <arm/simplebus/simplebusvar.h>
#else
#include <arm64/dev/simplebusvar.h>
#endif
extern void (*cpuresetfn)(void);
extern void (*powerdownfn)(void);
struct syscon_softc {
struct simplebus_softc sc_sbus;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
uint32_t sc_regmap;
bus_size_t sc_offset;
uint32_t sc_mask;
};
struct syscon_softc *syscon_reboot_sc;
struct syscon_softc *syscon_poweroff_sc;
int syscon_match(struct device *, void *, void *);
void syscon_attach(struct device *, struct device *, void *);
struct cfattach syscon_ca = {
sizeof(struct syscon_softc), syscon_match, syscon_attach
};
struct cfdriver syscon_cd = {
NULL, "syscon", DV_DULL
};
void syscon_reset(void);
void syscon_powerdown(void);
int
syscon_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
return OF_is_compatible(faa->fa_node, "syscon") ||
OF_is_compatible(faa->fa_node, "syscon-reboot") ||
OF_is_compatible(faa->fa_node, "syscon-poweroff");
}
void
syscon_attach(struct device *parent, struct device *self, void *aux)
{
struct syscon_softc *sc = (struct syscon_softc *)self;
struct fdt_attach_args *faa = aux;
char name[32];
OF_getprop(faa->fa_node, "name", name, sizeof(name));
name[sizeof(name) - 1] = 0;
if (OF_is_compatible(faa->fa_node, "syscon")) {
if (faa->fa_nreg < 1) {
printf(": no registers\n");
return;
}
sc->sc_iot = faa->fa_iot;
if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
faa->fa_reg[0].size, 0, &sc->sc_ioh)) {
printf(": can't map registers\n");
return;
}
regmap_register(faa->fa_node, sc->sc_iot, sc->sc_ioh,
faa->fa_reg[0].size);
}
if (OF_is_compatible(faa->fa_node, "simple-mfd"))
simplebus_attach(parent, &sc->sc_sbus.sc_dev, faa);
else
printf(": \"%s\"\n", name);
if (OF_is_compatible(faa->fa_node, "syscon-reboot") ||
OF_is_compatible(faa->fa_node, "syscon-poweroff")) {
sc->sc_regmap = OF_getpropint(faa->fa_node, "regmap", 0);
if (sc->sc_regmap == 0)
return;
if (OF_getproplen(faa->fa_node, "offset") != sizeof(uint32_t) ||
OF_getproplen(faa->fa_node, "mask") != sizeof(uint32_t))
return;
sc->sc_offset = OF_getpropint(faa->fa_node, "offset", 0);
sc->sc_mask = OF_getpropint(faa->fa_node, "mask", 0);
if (OF_is_compatible(faa->fa_node, "syscon-reboot")) {
syscon_reboot_sc = sc;
cpuresetfn = syscon_reset;
} else if (OF_is_compatible(faa->fa_node, "syscon-poweroff")) {
syscon_poweroff_sc = sc;
powerdownfn = syscon_powerdown;
}
}
}
void
syscon_reset(void)
{
struct syscon_softc *sc = syscon_reboot_sc;
struct regmap *rm;
rm = regmap_byphandle(sc->sc_regmap);
if (rm == NULL)
return;
regmap_write_4(rm, sc->sc_offset, sc->sc_mask);
delay(1000000);
}
void
syscon_powerdown(void)
{
struct syscon_softc *sc = syscon_poweroff_sc;
struct regmap *rm;
rm = regmap_byphandle(sc->sc_regmap);
if (rm == NULL)
return;
regmap_write_4(rm, sc->sc_offset, sc->sc_mask);
delay(1000000);
}
|
