[src/trunk]: src/sys/dev/fdt Add driver for dummy spdif transmitter bindings.

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/25104a1d129e
branches:  trunk
changeset: 461170:25104a1d129e
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sun Nov 17 19:30:42 2019 +0000

description:
Add driver for dummy spdif transmitter bindings.

diffstat:

 sys/dev/fdt/files.fdt  |    6 ++-
 sys/dev/fdt/spdif_tx.c |  114 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 119 insertions(+), 1 deletions(-)

diffs (138 lines):

diff -r d44202a90c0f -r 25104a1d129e sys/dev/fdt/files.fdt
--- a/sys/dev/fdt/files.fdt     Sun Nov 17 17:35:10 2019 +0000
+++ b/sys/dev/fdt/files.fdt     Sun Nov 17 19:30:42 2019 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.fdt,v 1.47 2019/10/30 21:37:56 jmcneill Exp $
+# $NetBSD: files.fdt,v 1.48 2019/11/17 19:30:42 jmcneill Exp $
 
 include        "external/bsd/libfdt/conf/files.libfdt"
 
@@ -98,6 +98,10 @@
 attach ausoc at fdt
 file   dev/fdt/ausoc.c                         ausoc
 
+device spdiftx
+attach spdiftx at fdt
+file   dev/fdt/spdif_tx.c                      spdiftx
+
 define fdt_display_timing
 file   dev/fdt/display_timing.c                fdt_display_timing
 
diff -r d44202a90c0f -r 25104a1d129e sys/dev/fdt/spdif_tx.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/fdt/spdif_tx.c    Sun Nov 17 19:30:42 2019 +0000
@@ -0,0 +1,114 @@
+/* $NetBSD: spdif_tx.c,v 1.1 2019/11/17 19:30:42 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2019 Jared McNeill <jmcneill%invisible.ca@localhost>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: spdif_tx.c,v 1.1 2019/11/17 19:30:42 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/device.h>
+#include <sys/systm.h>
+#include <sys/sysctl.h>
+#include <sys/kmem.h>
+
+#include <dev/audio/audio_dai.h>
+
+#include <dev/fdt/fdtvar.h>
+
+struct spdif_tx_softc {
+       device_t                sc_dev;
+       struct audio_dai_device sc_dai;
+};
+
+static int     spdif_tx_match(device_t, cfdata_t, void *);
+static void    spdif_tx_attach(device_t, device_t, void *);
+
+static const char *compatible[] = {
+       "linux,spdif-dit",
+       NULL
+};
+
+CFATTACH_DECL_NEW(spdiftx, sizeof(struct spdif_tx_softc),
+       spdif_tx_match, spdif_tx_attach, NULL, NULL);
+
+static int
+spdif_tx_set_format(audio_dai_tag_t dai, u_int format)
+{
+       return 0;
+}
+
+static int
+spdif_tx_add_device(audio_dai_tag_t dai, audio_dai_tag_t aux)
+{
+       return 0;
+}
+
+static const struct audio_hw_if spdif_tx_hw_if = { };
+
+static audio_dai_tag_t
+spdif_tx_dai_get_tag(device_t dev, const void *data, size_t len)
+{
+       struct spdif_tx_softc * const sc = device_private(dev);
+
+       if (len != 4)
+               return NULL;
+
+       return &sc->sc_dai;
+}
+
+static struct fdtbus_dai_controller_func spdif_tx_dai_funcs = {
+       .get_tag = spdif_tx_dai_get_tag
+};
+
+static int
+spdif_tx_match(device_t parent, cfdata_t cf, void *aux)
+{
+       struct fdt_attach_args * const faa = aux;
+
+       return of_match_compatible(faa->faa_phandle, compatible);
+}
+
+static void
+spdif_tx_attach(device_t parent, device_t self, void *aux)
+{
+       struct spdif_tx_softc * const sc = device_private(self);
+       struct fdt_attach_args * const faa = aux;
+       const int phandle = faa->faa_phandle;
+
+       sc->sc_dev = self;
+
+       aprint_naive("\n");
+       aprint_normal(": SPDIF transmitter\n");
+
+       sc->sc_dai.dai_set_format = spdif_tx_set_format;
+       sc->sc_dai.dai_add_device = spdif_tx_add_device;
+       sc->sc_dai.dai_hw_if = &spdif_tx_hw_if;
+       sc->sc_dai.dai_dev = self;
+       sc->sc_dai.dai_priv = sc;
+       fdtbus_register_dai_controller(self, phandle, &spdif_tx_dai_funcs);
+}