From 55bbfc45096c8046134a2062acb2dd0806f48250 Mon Sep 17 00:00:00 2001 From: Andrey Grodzovsky Date: Tue, 3 May 2016 22:10:59 -0400 Subject: [PATCH] ARM: adau1977-adc: Add basic machine driver for adau1977 codec driver. This commit adds basic support for the codec usage including: Device tree overlay, binding I2S bus and setting I2S mode, clock source and frequency setting according to spec. Signed-off-by: Andrey Grodzovsky --- sound/soc/bcm/Kconfig | 7 +++ sound/soc/bcm/Makefile | 2 + sound/soc/bcm/adau1977-adc.c | 125 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 134 insertions(+) create mode 100644 sound/soc/bcm/adau1977-adc.c --- a/sound/soc/bcm/Kconfig +++ b/sound/soc/bcm/Kconfig @@ -80,3 +80,10 @@ config SND_BCM2708_SOC_RASPIDAC3 select SND_SOC_TPA6130A2 help Say Y or M if you want to add support for RaspiDAC Rev.3x. + +config SND_BCM2708_SOC_ADAU1977_ADC + tristate "Support for ADAU1977 ADC" + depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S + select SND_SOC_ADAU1977_I2C + help + Say Y or M if you want to add support for ADAU1977 ADC. --- a/sound/soc/bcm/Makefile +++ b/sound/soc/bcm/Makefile @@ -9,6 +9,7 @@ snd-soc-cygnus-objs := cygnus-pcm.o cygn obj-$(CONFIG_SND_SOC_CYGNUS) += snd-soc-cygnus.o # BCM2708 Machine Support +snd-soc-adau1977-adc-objs := adau1977-adc.o snd-soc-hifiberry-dac-objs := hifiberry_dac.o snd-soc-hifiberry-dacplus-objs := hifiberry_dacplus.o snd-soc-hifiberry-digi-objs := hifiberry_digi.o @@ -19,6 +20,7 @@ snd-soc-rpi-proto-objs := rpi-proto.o snd-soc-iqaudio-dac-objs := iqaudio-dac.o snd-soc-raspidac3-objs := raspidac3.o +obj-$(CONFIG_SND_BCM2708_SOC_ADAU1977_ADC) += snd-soc-adau1977-adc.o obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI) += snd-soc-hifiberry-digi.o --- /dev/null +++ b/sound/soc/bcm/adau1977-adc.c @@ -0,0 +1,125 @@ +/* + * ASoC Driver for ADAU1977 ADC + * + * Author: Andrey Grodzovsky + * Copyright 2016 + * + * This file is based on hifibery_dac driver 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 +#include + +enum adau1977_clk_id { + ADAU1977_SYSCLK, +}; + +enum adau1977_sysclk_src { + ADAU1977_SYSCLK_SRC_MCLK, + ADAU1977_SYSCLK_SRC_LRCLK, +}; + +static int eval_adau1977_init(struct snd_soc_pcm_runtime *rtd) +{ + int ret; + struct snd_soc_dai *codec_dai = rtd->codec_dai; + + ret = snd_soc_dai_set_tdm_slot(codec_dai, 0, 0, 0, 0); + if (ret < 0) + return ret; + + return snd_soc_codec_set_sysclk(rtd->codec, ADAU1977_SYSCLK, + ADAU1977_SYSCLK_SRC_MCLK, 11289600, SND_SOC_CLOCK_IN); +} + +static struct snd_soc_dai_link snd_rpi_adau1977_dai[] = { + { + .name = "adau1977", + .stream_name = "ADAU1977", + .cpu_dai_name = "bcm2708-i2s.0", + .codec_dai_name = "adau1977-hifi", + .platform_name = "bcm2708-i2s.0", + .codec_name = "adau1977.1-0011", + .init = eval_adau1977_init, + .dai_fmt = SND_SOC_DAIFMT_I2S | + SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBM_CFM, + }, +}; + +/* audio machine driver */ +static struct snd_soc_card snd_adau1977_adc = { + .name = "snd_rpi_adau1977_adc", + .owner = THIS_MODULE, + .dai_link = snd_rpi_adau1977_dai, + .num_links = ARRAY_SIZE(snd_rpi_adau1977_dai), +}; + +static int snd_adau1977_adc_probe(struct platform_device *pdev) +{ + int ret = 0; + + snd_adau1977_adc.dev = &pdev->dev; + if (pdev->dev.of_node) { + struct device_node *i2s_node; + struct snd_soc_dai_link *dai = &snd_rpi_adau1977_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; + } + } + + ret = snd_soc_register_card(&snd_adau1977_adc); + if (ret) + dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret); + + return ret; +} + +static int snd_adau1977_adc_remove(struct platform_device *pdev) +{ + return snd_soc_unregister_card(&snd_adau1977_adc); +} + +static const struct of_device_id snd_adau1977_adc_of_match[] = { + { .compatible = "adi,adau1977-adc", }, + {}, +}; + +MODULE_DEVICE_TABLE(of, snd_adau1977_adc_of_match); + +static struct platform_driver snd_adau1977_adc_driver = { + .driver = { + .name = "snd-adau1977-adc", + .owner = THIS_MODULE, + .of_match_table = snd_adau1977_adc_of_match, + }, + .probe = snd_adau1977_adc_probe, + .remove = snd_adau1977_adc_remove, +}; + +module_platform_driver(snd_adau1977_adc_driver); + +MODULE_AUTHOR("Andrey Grodzovsky "); +MODULE_DESCRIPTION("ASoC Driver for ADAU1977 ADC"); +MODULE_LICENSE("GPL v2");