1 /* $OpenBSD: hireset.c,v 1.2 2021/10/24 17:52:26 mpi Exp $ */
2 /*
3 * Copyright (c) 2018 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/intr.h>
23 #include <machine/bus.h>
24 #include <machine/fdt.h>
25
26 #include <dev/ofw/openfirm.h>
27 #include <dev/ofw/ofw_clock.h>
28 #include <dev/ofw/ofw_misc.h>
29 #include <dev/ofw/fdt.h>
30
31 struct hireset_softc {
32 struct device sc_dev;
33 uint32_t sc_rst_syscon;
34
35 struct reset_device sc_rd;
36 };
37
38 int hireset_match(struct device *, void *, void *);
39 void hireset_attach(struct device *, struct device *, void *);
40
41 const struct cfattach hireset_ca = {
42 sizeof (struct hireset_softc), hireset_match, hireset_attach
43 };
44
45 struct cfdriver hireset_cd = {
46 NULL, "hireset", DV_DULL
47 };
48
49 void hireset_reset(void *, uint32_t *, int);
50
51 int
hireset_match(struct device * parent,void * match,void * aux)52 hireset_match(struct device *parent, void *match, void *aux)
53 {
54 struct fdt_attach_args *faa = aux;
55
56 return OF_is_compatible(faa->fa_node, "hisilicon,hi3660-reset");
57 }
58
59 void
hireset_attach(struct device * parent,struct device * self,void * aux)60 hireset_attach(struct device *parent, struct device *self, void *aux)
61 {
62 struct hireset_softc *sc = (struct hireset_softc *)self;
63 struct fdt_attach_args *faa = aux;
64
65 sc->sc_rst_syscon = OF_getpropint(faa->fa_node, "hisi,rst-syscon", 0);
66
67 printf("\n");
68
69 sc->sc_rd.rd_node = faa->fa_node;
70 sc->sc_rd.rd_cookie = sc;
71 sc->sc_rd.rd_reset = hireset_reset;
72 reset_register(&sc->sc_rd);
73 }
74
75 void
hireset_reset(void * cookie,uint32_t * cells,int on)76 hireset_reset(void *cookie, uint32_t *cells, int on)
77 {
78 struct hireset_softc *sc = cookie;
79 struct regmap *rm;
80 uint32_t offset = cells[0];
81 uint32_t bit = cells[1];
82
83 rm = regmap_byphandle(sc->sc_rst_syscon);
84 if (rm == NULL) {
85 printf("%s: can't find regmap\n", sc->sc_dev.dv_xname);
86 return;
87 }
88
89 if (on)
90 regmap_write_4(rm, offset + 0, (1 << bit));
91 else
92 regmap_write_4(rm, offset + 4, (1 << bit));
93 }
94