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      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
     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
     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 *
    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