diff --git a/sound/soc/bcm/Kconfig b/sound/soc/bcm/Kconfig index b8cb5eb7af9b3e..4f0330a6c06115 100644 --- a/sound/soc/bcm/Kconfig +++ b/sound/soc/bcm/Kconfig @@ -116,3 +116,10 @@ config SND_BCM2708_SOC_DIONAUDIO_LOCO select SND_SOC_PCM5102a help Say Y or M if you want to add support for Dion Audio LOCO. + +config SND_BCM2708_SOC_ALLO_PIANO_DAC + tristate "Support for Allo Piano DAC" + depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S + select SND_SOC_PCM512x_I2C + help + Say Y or M if you want to add support for Allo Piano DAC. diff --git a/sound/soc/bcm/Makefile b/sound/soc/bcm/Makefile index 28cdf019dbc7aa..4b94a42efecaee 100644 --- a/sound/soc/bcm/Makefile +++ b/sound/soc/bcm/Makefile @@ -23,6 +23,7 @@ snd-soc-raspidac3-objs := raspidac3.o snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o snd-soc-digidac1-soundcard-objs := digidac1-soundcard.o snd-soc-dionaudio-loco-objs := dionaudio_loco.o +snd-soc-allo-piano-dac-objs := allo-piano-dac.o obj-$(CONFIG_SND_BCM2708_SOC_ADAU1977_ADC) += snd-soc-adau1977-adc.o obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o @@ -38,3 +39,4 @@ obj-$(CONFIG_SND_BCM2708_SOC_RASPIDAC3) += snd-soc-raspidac3.o obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o obj-$(CONFIG_SND_DIGIDAC1_SOUNDCARD) += snd-soc-digidac1-soundcard.o obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO) += snd-soc-dionaudio-loco.o +obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC) += snd-soc-allo-piano-dac.o diff --git a/sound/soc/bcm/allo-piano-dac.c b/sound/soc/bcm/allo-piano-dac.c new file mode 100644 index 00000000000000..8e8e62e5a36a27 --- /dev/null +++ b/sound/soc/bcm/allo-piano-dac.c @@ -0,0 +1,144 @@ +/* + * ALSA ASoC Machine Driver for Allo Piano DAC + * + * Author: Baswaraj K + * Copyright 2016 + * based on code by Daniel Matuschek + * based on code by Florian Meier + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * 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. + */ + +#include +#include + +#include +#include +#include +#include + +static bool digital_gain_0db_limit = true; + +static int snd_allo_piano_dac_init(struct snd_soc_pcm_runtime *rtd) +{ + if (digital_gain_0db_limit) { + int ret; + struct snd_soc_card *card = rtd->card; + + ret = snd_soc_limit_volume(card, "Digital Playback Volume", + 207); + if (ret < 0) + dev_warn(card->dev, "Failed to set volume limit: %d\n", + ret); + } + + return 0; +} + +static int snd_allo_piano_dac_hw_params( + struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + + unsigned int sample_bits = + snd_pcm_format_physical_width(params_format(params)); + + return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2); +} + +/* machine stream operations */ +static struct snd_soc_ops snd_allo_piano_dac_ops = { + .hw_params = snd_allo_piano_dac_hw_params, +}; + +static struct snd_soc_dai_link snd_allo_piano_dac_dai[] = { +{ + .name = "Piano DAC", + .stream_name = "Piano DAC HiFi", + .cpu_dai_name = "bcm2708-i2s.0", + .codec_dai_name = "pcm512x-hifi", + .platform_name = "bcm2708-i2s.0", + .codec_name = "pcm512x.1-004c", + .dai_fmt = SND_SOC_DAIFMT_I2S | + SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBS_CFS, + .ops = &snd_allo_piano_dac_ops, + .init = snd_allo_piano_dac_init, +}, +}; + +/* audio machine driver */ +static struct snd_soc_card snd_allo_piano_dac = { + .name = "PianoDAC", + .owner = THIS_MODULE, + .dai_link = snd_allo_piano_dac_dai, + .num_links = ARRAY_SIZE(snd_allo_piano_dac_dai), +}; + +static int snd_allo_piano_dac_probe(struct platform_device *pdev) +{ + int ret = 0; + + snd_allo_piano_dac.dev = &pdev->dev; + + if (pdev->dev.of_node) { + struct device_node *i2s_node; + struct snd_soc_dai_link *dai; + + dai = &snd_allo_piano_dac_dai[0]; + i2s_node = of_parse_phandle(pdev->dev.of_node, + "i2s-controller", 0); + + if (i2s_node) { + dai->cpu_dai_name = NULL; + dai->cpu_of_node = i2s_node; + dai->platform_name = NULL; + dai->platform_of_node = i2s_node; + } + + digital_gain_0db_limit = !of_property_read_bool( + pdev->dev.of_node, "allo,24db_digital_gain"); + } + + ret = snd_soc_register_card(&snd_allo_piano_dac); + if (ret) + dev_err(&pdev->dev, + "snd_soc_register_card() failed: %d\n", ret); + + return ret; +} + +static int snd_allo_piano_dac_remove(struct platform_device *pdev) +{ + return snd_soc_unregister_card(&snd_allo_piano_dac); +} + +static const struct of_device_id snd_allo_piano_dac_of_match[] = { + { .compatible = "allo,piano-dac", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, snd_allo_piano_dac_of_match); + +static struct platform_driver snd_allo_piano_dac_driver = { + .driver = { + .name = "snd-allo-piano-dac", + .owner = THIS_MODULE, + .of_match_table = snd_allo_piano_dac_of_match, + }, + .probe = snd_allo_piano_dac_probe, + .remove = snd_allo_piano_dac_remove, +}; + +module_platform_driver(snd_allo_piano_dac_driver); + +MODULE_AUTHOR("Baswaraj K "); +MODULE_DESCRIPTION("ALSA ASoC Machine Driver for Allo Piano DAC"); +MODULE_LICENSE("GPL v2");