1 /* $OpenBSD: mvsysctrl.c,v 1.2 2021/10/24 17:52:27 mpi Exp $ */
2 /*
3 * Copyright (c) 2016 Patrick Wildt <patrick@blueri.se>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <sys/param.h>
19 #include <sys/systm.h>
20 #include <sys/device.h>
21 #include <machine/bus.h>
22 #include <machine/fdt.h>
23 #include <armv7/armv7/armv7_machdep.h>
24
25 #include <dev/ofw/openfirm.h>
26 #include <dev/ofw/fdt.h>
27
28 #define RSTOUTN 0x60
29 #define RSTOUTN_GLOBAL_SOFT_RSTOUT_EN 1
30 #define SYSSOFTRST 0x64
31 #define SYSSOFTRST_GLOBAL_SOFT_RST 1
32
33 #define HREAD4(sc, reg) \
34 (bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg)))
35 #define HWRITE4(sc, reg, val) \
36 bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val))
37 #define HSET4(sc, reg, bits) \
38 HWRITE4((sc), (reg), HREAD4((sc), (reg)) | (bits))
39 #define HCLR4(sc, reg, bits) \
40 HWRITE4((sc), (reg), HREAD4((sc), (reg)) & ~(bits))
41
42 struct mvsysctrl_softc {
43 struct device sc_dev;
44 bus_space_tag_t sc_iot;
45 bus_space_handle_t sc_ioh;
46 };
47
48 int mvsysctrl_match(struct device *, void *, void *);
49 void mvsysctrl_attach(struct device *, struct device *, void *);
50
51 void mvsysctrl_reset(void);
52
53 struct mvsysctrl_softc *mvsysctrl_sc;
54
55 const struct cfattach mvsysctrl_ca = {
56 sizeof (struct mvsysctrl_softc), mvsysctrl_match, mvsysctrl_attach
57 };
58
59 struct cfdriver mvsysctrl_cd = {
60 NULL, "mvsysctrl", DV_DULL
61 };
62
63 int
mvsysctrl_match(struct device * parent,void * cfdata,void * aux)64 mvsysctrl_match(struct device *parent, void *cfdata, void *aux)
65 {
66 struct fdt_attach_args *faa = aux;
67
68 return OF_is_compatible(faa->fa_node,
69 "marvell,armada-370-xp-system-controller");
70 }
71
72 void
mvsysctrl_attach(struct device * parent,struct device * self,void * args)73 mvsysctrl_attach(struct device *parent, struct device *self, void *args)
74 {
75 struct mvsysctrl_softc *sc = (struct mvsysctrl_softc *)self;
76 struct fdt_attach_args *faa = args;
77
78 sc->sc_iot = faa->fa_iot;
79 if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
80 faa->fa_reg[0].size, 0, &sc->sc_ioh))
81 panic("%s: bus_space_map failed!", __func__);
82
83 printf("\n");
84
85 mvsysctrl_sc = sc;
86 cpuresetfn = mvsysctrl_reset;
87 }
88
89 void
mvsysctrl_reset(void)90 mvsysctrl_reset(void)
91 {
92 struct mvsysctrl_softc *sc = mvsysctrl_sc;
93
94 HWRITE4(sc, RSTOUTN, RSTOUTN_GLOBAL_SOFT_RSTOUT_EN);
95 HWRITE4(sc, SYSSOFTRST, SYSSOFTRST_GLOBAL_SOFT_RST);
96
97 for (;;)
98 continue;
99 }
100