1 /* $OpenBSD: sxisyscon.c,v 1.3 2024/02/07 22:00:38 uaa Exp $ */
2 /*
3 * Copyright (c) 2019 Mark Kettenis <kettenis@openbsd.org>
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 struct sxisyscon_softc {
30 struct device sc_dev;
31 bus_space_tag_t sc_iot;
32 bus_space_handle_t sc_ioh;
33 };
34
35 int sxisyscon_match(struct device *, void *, void *);
36 void sxisyscon_attach(struct device *, struct device *, void *);
37
38 const struct cfattach sxisyscon_ca = {
39 sizeof(struct sxisyscon_softc), sxisyscon_match, sxisyscon_attach
40 };
41
42 struct cfdriver sxisyscon_cd = {
43 NULL, "sxisyscon", DV_DULL
44 };
45
46 int
sxisyscon_match(struct device * parent,void * match,void * aux)47 sxisyscon_match(struct device *parent, void *match, void *aux)
48 {
49 struct fdt_attach_args *faa = aux;
50 int node = faa->fa_node;
51
52 if (OF_is_compatible(node, "allwinner,sun8i-h3-system-control") ||
53 OF_is_compatible(node, "allwinner,sun50i-a64-system-control") ||
54 OF_is_compatible(node, "allwinner,sun50i-h5-system-control") ||
55 OF_is_compatible(node, "allwinner,sun50i-h6-system-control") ||
56 OF_is_compatible(node, "allwinner,sun50i-h616-system-control"))
57 return 10; /* Must beat syscon(4). */
58
59 return 0;
60 }
61
62 void
sxisyscon_attach(struct device * parent,struct device * self,void * aux)63 sxisyscon_attach(struct device *parent, struct device *self, void *aux)
64 {
65 struct sxisyscon_softc *sc = (struct sxisyscon_softc *)self;
66 struct fdt_attach_args *faa = aux;
67
68 if (faa->fa_nreg < 1) {
69 printf(": no registers\n");
70 return;
71 }
72
73 sc->sc_iot = faa->fa_iot;
74 if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
75 faa->fa_reg[0].size, 0, &sc->sc_ioh)) {
76 printf(": can't map registers\n");
77 return;
78 }
79
80 regmap_register(faa->fa_node, sc->sc_iot, sc->sc_ioh,
81 faa->fa_reg[0].size);
82
83 printf("\n");
84 }
85