1 /* $OpenBSD: expower.c,v 1.11 2023/09/22 01:10:43 jsg Exp $ */
2 /*
3 * Copyright (c) 2012-2013 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
22 #include <machine/bus.h>
23 #include <machine/fdt.h>
24
25 #include <dev/ofw/openfirm.h>
26 #include <dev/ofw/ofw_misc.h>
27 #include <dev/ofw/fdt.h>
28
29 #include <machine/simplebusvar.h>
30
31 #define HREAD4(sc, reg) \
32 (bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg)))
33 #define HWRITE4(sc, reg, val) \
34 bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val))
35 #define HSET4(sc, reg, bits) \
36 HWRITE4((sc), (reg), HREAD4((sc), (reg)) | (bits))
37 #define HCLR4(sc, reg, bits) \
38 HWRITE4((sc), (reg), HREAD4((sc), (reg)) & ~(bits))
39
40 struct expower_softc {
41 struct simplebus_softc sc_sbus;
42 bus_space_tag_t sc_iot;
43 bus_space_handle_t sc_ioh;
44 };
45
46 int expower_match(struct device *, void *, void *);
47 void expower_attach(struct device *, struct device *, void *);
48
49 const struct cfattach expower_ca = {
50 sizeof (struct expower_softc), expower_match, expower_attach
51 };
52
53 struct cfdriver expower_cd = {
54 NULL, "expower", DV_DULL
55 };
56
57 int
expower_match(struct device * parent,void * match,void * aux)58 expower_match(struct device *parent, void *match, void *aux)
59 {
60 struct fdt_attach_args *faa = aux;
61
62 if (OF_is_compatible(faa->fa_node, "samsung,exynos5250-pmu") ||
63 OF_is_compatible(faa->fa_node, "samsung,exynos5420-pmu"))
64 return 10; /* Must beat syscon(4). */
65
66 return 0;
67 }
68
69 void
expower_attach(struct device * parent,struct device * self,void * aux)70 expower_attach(struct device *parent, struct device *self, void *aux)
71 {
72 struct expower_softc *sc = (struct expower_softc *)self;
73 struct fdt_attach_args *faa = aux;
74
75 if (faa->fa_nreg < 1) {
76 printf(": no registers\n");
77 return;
78 }
79
80 sc->sc_iot = faa->fa_iot;
81 if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
82 faa->fa_reg[0].size, 0, &sc->sc_ioh)) {
83 printf(": can't map registers\n");
84 return;
85 }
86
87 regmap_register(faa->fa_node, sc->sc_iot, sc->sc_ioh,
88 faa->fa_reg[0].size);
89
90 simplebus_attach(parent, &sc->sc_sbus.sc_dev, faa);
91 }
92