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
31struct hireset_softc {
32	struct device		sc_dev;
33	uint32_t		sc_rst_syscon;
34
35	struct reset_device	sc_rd;
36};
37
38int hireset_match(struct device *, void *, void *);
39void hireset_attach(struct device *, struct device *, void *);
40
41const struct cfattach	hireset_ca = {
42	sizeof (struct hireset_softc), hireset_match, hireset_attach
43};
44
45struct cfdriver hireset_cd = {
46	NULL, "hireset", DV_DULL
47};
48
49void	hireset_reset(void *, uint32_t *, int);
50
51int
52hireset_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
59void
60hireset_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
75void
76hireset_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