rkgrf.c revision 1.3 
1/*	$OpenBSD: rkgrf.c,v 1.3 2019/11/29 21:59:55 patrick Exp $	*/
2/*
3 * Copyright (c) 2017 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_misc.h>
28#include <dev/ofw/fdt.h>
29
30#ifdef __armv7__
31#include <arm/simplebus/simplebusvar.h>
32#else
33#include <arm64/dev/simplebusvar.h>
34#endif
35
36struct rkgrf_softc {
37	struct simplebus_softc	sc_sbus;
38	bus_space_tag_t		sc_iot;
39	bus_space_handle_t	sc_ioh;
40};
41
42int rkgrf_match(struct device *, void *, void *);
43void rkgrf_attach(struct device *, struct device *, void *);
44
45struct cfattach	rkgrf_ca = {
46	sizeof (struct rkgrf_softc), rkgrf_match, rkgrf_attach
47};
48
49struct cfdriver rkgrf_cd = {
50	NULL, "rkgrf", DV_DULL
51};
52
53int
54rkgrf_match(struct device *parent, void *match, void *aux)
55{
56	struct fdt_attach_args *faa = aux;
57
58	return (OF_is_compatible(faa->fa_node, "rockchip,rk3288-grf") ||
59	    OF_is_compatible(faa->fa_node, "rockchip,rk3288-pmu") ||
60	    OF_is_compatible(faa->fa_node, "rockchip,rk3288-sgrf") ||
61	    OF_is_compatible(faa->fa_node, "rockchip,rk3399-grf") ||
62	    OF_is_compatible(faa->fa_node, "rockchip,rk3399-pmugrf"));
63}
64
65void
66rkgrf_attach(struct device *parent, struct device *self, void *aux)
67{
68	struct rkgrf_softc *sc = (struct rkgrf_softc *)self;
69	struct fdt_attach_args *faa = aux;
70
71	if (faa->fa_nreg < 1) {
72		printf(": no registers\n");
73		return;
74	}
75
76	sc->sc_iot = faa->fa_iot;
77
78	if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
79	    faa->fa_reg[0].size, 0, &sc->sc_ioh)) {
80		printf(": can't map registers\n");
81		return;
82	}
83
84	printf("\n");
85
86	regmap_register(faa->fa_node, sc->sc_iot, sc->sc_ioh,
87	    faa->fa_reg[0].size);
88
89	/* Attach PHYs. */
90	simplebus_attach(parent, &sc->sc_sbus.sc_dev, faa);
91}
92