From: Kenneth Westfield kwestfie@codeaurora.org
Add codec driver for the Maxim MAX98357A DAC.
Signed-off-by: Kenneth Westfield kwestfie@codeaurora.org Acked-by: Banajit Goswami bgoswami@codeaurora.org --- sound/soc/codecs/Kconfig | 4 ++ sound/soc/codecs/Makefile | 2 + sound/soc/codecs/max98357a.c | 138 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 144 insertions(+) create mode 100644 sound/soc/codecs/max98357a.c
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 3190eed43c38d8145536d1804f7686b108f97641..064e6c18e10923fd75609b750405dbc33f9db6af 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -69,6 +69,7 @@ config SND_SOC_ALL_CODECS select SND_SOC_MAX98088 if I2C select SND_SOC_MAX98090 if I2C select SND_SOC_MAX98095 if I2C + select SND_SOC_MAX98357A select SND_SOC_MAX9850 if I2C select SND_SOC_MAX9768 if I2C select SND_SOC_MAX9877 if I2C @@ -456,6 +457,9 @@ config SND_SOC_MAX98090 config SND_SOC_MAX98095 tristate
+config SND_SOC_MAX98357A + tristate + config SND_SOC_MAX9850 tristate
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index bbdfd1e1c182f9ee102f532f391f522e77a8922b..69b8666d187a0e8d1e2a532e68e2509acc95da7e 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -64,6 +64,7 @@ snd-soc-max9768-objs := max9768.o snd-soc-max98088-objs := max98088.o snd-soc-max98090-objs := max98090.o snd-soc-max98095-objs := max98095.o +snd-soc-max98357a-objs := max98357a.o snd-soc-max9850-objs := max9850.o snd-soc-mc13783-objs := mc13783.o snd-soc-ml26124-objs := ml26124.o @@ -245,6 +246,7 @@ obj-$(CONFIG_SND_SOC_MAX9768) += snd-soc-max9768.o obj-$(CONFIG_SND_SOC_MAX98088) += snd-soc-max98088.o obj-$(CONFIG_SND_SOC_MAX98090) += snd-soc-max98090.o obj-$(CONFIG_SND_SOC_MAX98095) += snd-soc-max98095.o +obj-$(CONFIG_SND_SOC_MAX98357A) += snd-soc-max98357a.o obj-$(CONFIG_SND_SOC_MAX9850) += snd-soc-max9850.o obj-$(CONFIG_SND_SOC_MC13783) += snd-soc-mc13783.o obj-$(CONFIG_SND_SOC_ML26124) += snd-soc-ml26124.o diff --git a/sound/soc/codecs/max98357a.c b/sound/soc/codecs/max98357a.c new file mode 100644 index 0000000000000000000000000000000000000000..98b915314d7a00390060411fb1b910aec6f46e9d --- /dev/null +++ b/sound/soc/codecs/max98357a.c @@ -0,0 +1,138 @@ +/* Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * max98357a.c -- MAX98357A ALSA SoC Codec driver + */ + +#include <linux/module.h> +#include <linux/gpio.h> +#include <sound/soc.h> + +#define DRV_NAME "max98357a" + +static int max98357a_daiops_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + struct gpio_desc *sdmode = snd_soc_dai_get_drvdata(dai); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + gpiod_set_value(sdmode, 1); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + gpiod_set_value(sdmode, 0); + break; + } + + return 0; +} + +static const struct snd_soc_dapm_widget max98357a_dapm_widgets[] = { + SND_SOC_DAPM_DAC("SDMode", NULL, SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_OUTPUT("Speaker"), +}; + +static const struct snd_soc_dapm_route max98357a_dapm_routes[] = { + {"Speaker", NULL, "SDMode"}, +}; + +static int max98357a_codec_probe(struct snd_soc_codec *codec) +{ + struct gpio_desc *sdmode; + + sdmode = devm_gpiod_get(codec->dev, "sdmode"); + if (IS_ERR(sdmode)) { + dev_err(codec->dev, "%s() unable to get sdmode GPIO: %ld\n", + __func__, PTR_ERR(sdmode)); + return PTR_ERR(sdmode); + } + gpiod_direction_output(sdmode, 0); + snd_soc_codec_set_drvdata(codec, sdmode); + + return 0; +} + +static struct snd_soc_codec_driver max98357a_codec_driver = { + .probe = max98357a_codec_probe, + .dapm_widgets = max98357a_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(max98357a_dapm_widgets), + .dapm_routes = max98357a_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(max98357a_dapm_routes), +}; + +static struct snd_soc_dai_ops max98357a_dai_ops = { + .trigger = max98357a_daiops_trigger, +}; + +static struct snd_soc_dai_driver max98357a_dai_driver = { + .name = DRV_NAME, + .playback = { + .stream_name = DRV_NAME "-playback", + .formats = SNDRV_PCM_FMTBIT_S16 | + SNDRV_PCM_FMTBIT_S24 | + SNDRV_PCM_FMTBIT_S32, + .rates = SNDRV_PCM_RATE_8000 | + SNDRV_PCM_RATE_16000 | + SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_96000, + .rate_min = 8000, + .rate_max = 96000, + .channels_min = 1, + .channels_max = 2, + }, + .ops = &max98357a_dai_ops, +}; + +static int max98357a_platform_probe(struct platform_device *pdev) +{ + int ret; + + ret = snd_soc_register_codec(&pdev->dev, &max98357a_codec_driver, + &max98357a_dai_driver, 1); + if (ret) + dev_err(&pdev->dev, "%s() error registering codec driver: %d\n", + __func__, ret); + + return ret; +} + +static int max98357a_platform_remove(struct platform_device *pdev) +{ + snd_soc_unregister_codec(&pdev->dev); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id max98357a_device_id[] = { + { .compatible = "maxim," DRV_NAME, }, + {} +}; +#endif + +static struct platform_driver max98357a_platform_driver = { + .driver = { + .name = DRV_NAME, + .of_match_table = of_match_ptr(max98357a_device_id), + }, + .probe = max98357a_platform_probe, + .remove = max98357a_platform_remove, +}; +module_platform_driver(max98357a_platform_driver); + +MODULE_DESCRIPTION("Maxim MAX98357A Codec Driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DRV_NAME); +MODULE_DEVICE_TABLE(of, max98357a_device_id);