1 /* $NetBSD: connector_fdt.c,v 1.5 2021/01/27 03:10:21 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 1.5 2021/01/27 03:10:21 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
52 static int fdt_connector_match(device_t, cfdata_t, void *);
53 static void fdt_connector_attach(device_t, device_t, void *);
54 static void *fdt_connector_get_data(device_t, struct fdt_endpoint *);
55
56 SLIST_HEAD(, fdt_connector_softc) fdt_connectors =
57 SLIST_HEAD_INITIALIZER(&fdt_connectors);
58
59 struct 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
69 CFATTACH_DECL_NEW(fdt_connector, sizeof(struct fdt_connector_softc),
70 fdt_connector_match, fdt_connector_attach, NULL, NULL);
71
72 static 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 DEVICE_COMPAT_EOL
78 };
79
80 static int
fdt_connector_match(device_t parent,cfdata_t cf,void * aux)81 fdt_connector_match(device_t parent, cfdata_t cf, void *aux)
82 {
83 const struct fdt_attach_args *faa = aux;
84
85 return of_compatible_match(faa->faa_phandle, compat_data);
86 }
87
88 static void
fdt_connector_attach(device_t parent,device_t self,void * aux)89 fdt_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_compatible_lookup(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
123 static void *
fdt_connector_get_data(device_t dev,struct fdt_endpoint * ep)124 fdt_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