connector_fdt.c revision 1.3 
1/*	$NetBSD: connector_fdt.c,v 1.3 2021/01/25 14:25:09 thorpej Exp $	*/
2
3/*-
4 * Copyright (c) 2018 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Manuel Bouyer.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * connector driver.
34 * specified in linux/Documentation/devicetree/bindings/display/connector/
35 * basically it only register its endpoint.
36 */
37
38#include <sys/cdefs.h>
39
40__KERNEL_RCSID(1, "$NetBSD: connector_fdt.c,v 1.3 2021/01/25 14:25:09 thorpej Exp $");
41
42#include <sys/param.h>
43#include <sys/systm.h>
44#include <sys/device.h>
45#include <sys/bus.h>
46#include <sys/kmem.h>
47
48#include <dev/fdt/fdtvar.h>
49#include <dev/fdt/fdt_port.h>
50#include <dev/fdt/connector_fdt.h>
51
52static int fdt_connector_match(device_t, cfdata_t, void *);
53static void fdt_connector_attach(device_t, device_t, void *);
54static void *fdt_connector_get_data(device_t, struct fdt_endpoint *);
55
56SLIST_HEAD(, fdt_connector_softc) fdt_connectors =
57    SLIST_HEAD_INITIALIZER(&fdt_connectors);
58
59struct fdt_connector_softc {
60	device_t sc_dev;
61	int sc_phandle;
62	struct fdt_connector sc_con;
63	SLIST_ENTRY(fdt_connector_softc) sc_list;
64	struct fdt_device_ports sc_ports;
65};
66
67#define sc_type sc_con.con_type
68
69CFATTACH_DECL_NEW(fdt_connector, sizeof(struct fdt_connector_softc),
70    fdt_connector_match, fdt_connector_attach, NULL, NULL);
71
72static const struct device_compatible_entry compat_data[] = {
73	{ .compat = "composite-video-connector",	.value = CON_TV},
74	{ .compat = "dvi-connector",			.value = CON_DVI},
75	{ .compat = "hdmi-connector",			.value = CON_HDMI},
76	{ .compat = "vga-connector",			.value = CON_VGA},
77	{ }
78};
79
80static int
81fdt_connector_match(device_t parent, cfdata_t cf, void *aux)
82{
83	const struct fdt_attach_args *faa = aux;
84
85	return of_match_compat_data(faa->faa_phandle, compat_data);
86}
87
88static void
89fdt_connector_attach(device_t parent, device_t self, void *aux)
90{
91	struct fdt_connector_softc *sc = device_private(self);
92	const struct fdt_attach_args * const faa = aux;
93	const int phandle = faa->faa_phandle;
94
95	sc->sc_dev = self;
96	sc->sc_phandle = phandle;
97	sc->sc_type = of_search_compatible(phandle, compat_data)->value;
98
99	SLIST_INSERT_HEAD(&fdt_connectors, sc, sc_list);
100
101	aprint_naive("\n");
102	switch(sc->sc_type) {
103	case CON_VGA:
104		aprint_normal(": VGA");
105		break;
106	case CON_DVI:
107		aprint_normal(": DVI");
108		break;
109	case CON_HDMI:
110		aprint_normal(": HDMI");
111		break;
112	case CON_TV:
113		aprint_normal(": composite");
114		break;
115	default:
116		panic("unknown connector type %d\n", sc->sc_type);
117	}
118	aprint_normal(" connector\n");
119	sc->sc_ports.dp_ep_get_data = fdt_connector_get_data;
120	fdt_ports_register(&sc->sc_ports, self, phandle, EP_CONNECTOR);
121}
122
123static void *
124fdt_connector_get_data(device_t dev, struct fdt_endpoint *ep)
125{
126	struct fdt_connector_softc *sc = device_private(dev);
127
128	return &sc->sc_con;
129}
130