Add driver for simple-audio-amplifier binding
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jmcneill
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6ee7d63e9e
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ec17524941
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# $NetBSD: files.fdt,v 1.49 2019/12/19 00:35:01 jakllsch Exp $
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# $NetBSD: files.fdt,v 1.50 2020/01/02 00:57:10 jmcneill Exp $
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include "external/bsd/libfdt/conf/files.libfdt"
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@ -165,3 +165,9 @@ file dev/fdt/arasan_sdhc_fdt.c arasan_sdhc_fdt
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device usbnopphy
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attach usbnopphy at fdt
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file dev/fdt/usbnopphy.c usbnopphy
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# Simple Amplifier Audio Driver
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device simpleamp
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attach simpleamp at fdt
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file dev/fdt/simple_amplifier.c simpleamp
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@ -0,0 +1,137 @@
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/* $NetBSD: simple_amplifier.c,v 1.1 2020/01/02 00:57:09 jmcneill Exp $ */
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/*-
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* Copyright (c) 2020 Jared McNeill <jmcneill@invisible.ca>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: simple_amplifier.c,v 1.1 2020/01/02 00:57:09 jmcneill Exp $");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/device.h>
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#include <sys/systm.h>
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#include <sys/sysctl.h>
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#include <sys/kmem.h>
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#include <dev/audio/audio_dai.h>
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#include <dev/fdt/fdtvar.h>
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struct simple_amplifier_softc {
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device_t sc_dev;
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struct audio_dai_device sc_dai;
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struct fdtbus_gpio_pin *sc_pin;
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struct fdtbus_regulator *sc_vcc;
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};
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static int simple_amplifier_match(device_t, cfdata_t, void *);
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static void simple_amplifier_attach(device_t, device_t, void *);
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static const char *compatible[] = {
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"simple-audio-amplifier",
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NULL
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};
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CFATTACH_DECL_NEW(simpleamp, sizeof(struct simple_amplifier_softc),
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simple_amplifier_match, simple_amplifier_attach, NULL, NULL);
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static int
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simple_amplifier_open(void *priv, int flags)
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{
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struct simple_amplifier_softc * const sc = priv;
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int error;
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if (sc->sc_pin != NULL)
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fdtbus_gpio_write(sc->sc_pin, 1);
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if (sc->sc_vcc != NULL) {
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error = fdtbus_regulator_enable(sc->sc_vcc);
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if (error != 0)
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aprint_error_dev(sc->sc_dev, "couldn't enable power supply\n");
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}
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return 0;
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}
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static void
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simple_amplifier_close(void *priv)
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{
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struct simple_amplifier_softc * const sc = priv;
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if (sc->sc_pin != NULL)
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fdtbus_gpio_write(sc->sc_pin, 0);
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if (sc->sc_vcc != NULL)
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(void)fdtbus_regulator_disable(sc->sc_vcc);
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}
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static const struct audio_hw_if simple_amplifier_hw_if = {
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.open = simple_amplifier_open,
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.close = simple_amplifier_close,
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};
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static audio_dai_tag_t
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simple_amplifier_dai_get_tag(device_t dev, const void *data, size_t len)
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{
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struct simple_amplifier_softc * const sc = device_private(dev);
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if (len != 4)
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return NULL;
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return &sc->sc_dai;
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}
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static struct fdtbus_dai_controller_func simple_amplifier_dai_funcs = {
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.get_tag = simple_amplifier_dai_get_tag
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};
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static int
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simple_amplifier_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct fdt_attach_args * const faa = aux;
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return of_match_compatible(faa->faa_phandle, compatible);
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}
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static void
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simple_amplifier_attach(device_t parent, device_t self, void *aux)
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{
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struct simple_amplifier_softc * const sc = device_private(self);
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struct fdt_attach_args * const faa = aux;
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const int phandle = faa->faa_phandle;
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sc->sc_dev = self;
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sc->sc_pin = fdtbus_gpio_acquire(phandle, "enable-gpios", GPIO_PIN_OUTPUT);
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sc->sc_vcc = fdtbus_regulator_acquire(phandle, "VCC-supply");
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aprint_naive("\n");
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aprint_normal(": Simple Amplifier\n");
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sc->sc_dai.dai_hw_if = &simple_amplifier_hw_if;
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sc->sc_dai.dai_dev = self;
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sc->sc_dai.dai_priv = sc;
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fdtbus_register_dai_controller(self, phandle, &simple_amplifier_dai_funcs);
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}
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