1 /* $OpenBSD: imxpciephy.c,v 1.2 2022/04/06 18:59:28 naddy Exp $ */
2 /*
3 * Copyright (c) 2020 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 struct imxpciephy_softc {
30 struct device sc_dev;
31 bus_space_tag_t sc_iot;
32 bus_space_handle_t sc_ioh;
33 };
34
35 int imxpciephy_match(struct device *, void *, void *);
36 void imxpciephy_attach(struct device *, struct device *, void *);
37
38 const struct cfattach imxpciephy_ca = {
39 sizeof(struct imxpciephy_softc), imxpciephy_match, imxpciephy_attach
40 };
41
42 struct cfdriver imxpciephy_cd = {
43 NULL, "imxpciephy", DV_DULL
44 };
45
46 int
imxpciephy_match(struct device * parent,void * match,void * aux)47 imxpciephy_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, "fsl,imx7d-pcie-phy"))
53 return 10; /* Must beat syscon(4). */
54
55 return 0;
56 }
57
58 void
imxpciephy_attach(struct device * parent,struct device * self,void * aux)59 imxpciephy_attach(struct device *parent, struct device *self, void *aux)
60 {
61 struct imxpciephy_softc *sc = (struct imxpciephy_softc *)self;
62 struct fdt_attach_args *faa = aux;
63
64 if (faa->fa_nreg < 1) {
65 printf(": no registers\n");
66 return;
67 }
68
69 sc->sc_iot = faa->fa_iot;
70 if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
71 faa->fa_reg[0].size, 0, &sc->sc_ioh)) {
72 printf(": can't map registers\n");
73 return;
74 }
75
76 regmap_register(faa->fa_node, sc->sc_iot, sc->sc_ioh,
77 faa->fa_reg[0].size);
78
79 printf("\n");
80 }
81