From 1b18f3be9f034c2e9aefab9b97c5100d5f914a89 Mon Sep 17 00:00:00 2001 From: DigitalDreamtime Date: Thu, 30 Jun 2016 18:38:42 +0100 Subject: [PATCH] Add IQAudIO Digi WM8804 board support Support IQAudIO Digi board with iqaudio_digi machine driver and iqaudio-digi-wm8804-audio overlay. NB. Machine driver is a cut and paste of hifiberry_digi code, with format and general cleanup to comply with kernel coding standards. Signed-off-by: DigitalDreamtime --- sound/soc/bcm/Kconfig | 7 ++ sound/soc/bcm/Makefile | 2 + sound/soc/bcm/iqaudio_digi.c | 239 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 248 insertions(+) create mode 100644 sound/soc/bcm/iqaudio_digi.c --- a/sound/soc/bcm/Kconfig +++ b/sound/soc/bcm/Kconfig @@ -73,6 +73,13 @@ config SND_BCM2708_SOC_IQAUDIO_DAC help Say Y or M if you want to add support for IQaudIO-DAC. +config SND_BCM2708_SOC_IQAUDIO_DIGI + tristate "Support for IQAudIO Digi" + depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S + select SND_SOC_WM8804 + help + Say Y or M if you want to add support for IQAudIO Digital IO board. + config SND_BCM2708_SOC_RASPIDAC3 tristate "Support for RaspiDAC Rev.3x" depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S --- a/sound/soc/bcm/Makefile +++ b/sound/soc/bcm/Makefile @@ -18,6 +18,7 @@ snd-soc-justboom-digi-objs := justboom-d snd-soc-rpi-dac-objs := rpi-dac.o snd-soc-rpi-proto-objs := rpi-proto.o snd-soc-iqaudio-dac-objs := iqaudio-dac.o +snd-soc-iqaudio-digi-objs := iqaudio_digi.o snd-soc-raspidac3-objs := raspidac3.o snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o @@ -30,6 +31,7 @@ obj-$(CONFIG_SND_BCM2708_SOC_JUSTBOOM_DI obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o +obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DIGI) += snd-soc-iqaudio-digi.o obj-$(CONFIG_SND_BCM2708_SOC_RASPIDAC3) += snd-soc-raspidac3.o obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o --- /dev/null +++ b/sound/soc/bcm/iqaudio_digi.c @@ -0,0 +1,239 @@ +/* + * ASoC Driver for IQAudIO WM8804 Digi + * + * Author: Daniel Matuschek + * based on the HifiBerry DAC driver by Florian Meier + * Copyright 2013 + * + * 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 + +#include "../codecs/wm8804.h" + +static short int auto_shutdown_output; +module_param(auto_shutdown_output, short, + S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); +MODULE_PARM_DESC(auto_shutdown_output, "Shutdown SP/DIF output if playback is stopped"); + +static int snd_rpi_iqaudio_digi_init(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_codec *codec = rtd->codec; + + /* enable TX output */ + snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0); + + return 0; +} + +static int snd_rpi_iqaudio_digi_startup(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_codec *codec = rtd->codec; + + /* turn on digital output */ + snd_soc_update_bits(codec, WM8804_PWRDN, 0x3c, 0x00); + + return 0; +} + +static void snd_rpi_iqaudio_digi_shutdown(struct snd_pcm_substream *substream) +{ + if (auto_shutdown_output) { + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_codec *codec = rtd->codec; + + /* turn off digital output */ + snd_soc_update_bits(codec, WM8804_PWRDN, 0x3c, 0x3c); + } +} + + +static int snd_rpi_iqaudio_digi_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 *codec_dai = rtd->codec_dai; + struct snd_soc_codec *codec = rtd->codec; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + + int sysclk = 27000000; /* This is fixed on this board */ + + long mclk_freq = 0; + int mclk_div = 1; + int sampling_freq = 1; + + int ret; + + int samplerate = params_rate(params); + + if (samplerate <= 96000) { + mclk_freq = samplerate * 256; + mclk_div = WM8804_MCLKDIV_256FS; + } else { + mclk_freq = samplerate * 128; + mclk_div = WM8804_MCLKDIV_128FS; + } + + switch (samplerate) { + case 32000: + sampling_freq = 0x03; + break; + case 44100: + sampling_freq = 0x00; + break; + case 48000: + sampling_freq = 0x02; + break; + case 88200: + sampling_freq = 0x08; + break; + case 96000: + sampling_freq = 0x0a; + break; + case 176400: + sampling_freq = 0x0c; + break; + case 192000: + sampling_freq = 0x0e; + break; + default: + dev_err(codec->dev, "Failed to set WM8804 SYSCLK, unsupported samplerate %d\n", + samplerate); + } + + snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div); + snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq); + + ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL, + sysclk, SND_SOC_CLOCK_OUT); + if (ret < 0) { + dev_err(codec->dev, "Failed to set WM8804 SYSCLK: %d\n", ret); + return ret; + } + + /* Enable TX output */ + snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0); + + /* Power on */ + snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0); + + /* set sampling frequency status bits */ + snd_soc_update_bits(codec, WM8804_SPDTX4, 0x0f, sampling_freq); + + return snd_soc_dai_set_bclk_ratio(cpu_dai, 64); +} + +/* machine stream operations */ +static struct snd_soc_ops snd_rpi_iqaudio_digi_ops = { + .hw_params = snd_rpi_iqaudio_digi_hw_params, + .startup = snd_rpi_iqaudio_digi_startup, + .shutdown = snd_rpi_iqaudio_digi_shutdown, +}; + +static struct snd_soc_dai_link snd_rpi_iqaudio_digi_dai[] = { +{ + .name = "IQAudIO Digi", + .stream_name = "IQAudIO Digi HiFi", + .cpu_dai_name = "bcm2708-i2s.0", + .codec_dai_name = "wm8804-spdif", + .platform_name = "bcm2708-i2s.0", + .codec_name = "wm8804.1-003b", + .dai_fmt = SND_SOC_DAIFMT_I2S | + SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBM_CFM, + .ops = &snd_rpi_iqaudio_digi_ops, + .init = snd_rpi_iqaudio_digi_init, +}, +}; + +/* audio machine driver */ +static struct snd_soc_card snd_rpi_iqaudio_digi = { + .name = "IQAudIODigi", + .owner = THIS_MODULE, + .dai_link = snd_rpi_iqaudio_digi_dai, + .num_links = ARRAY_SIZE(snd_rpi_iqaudio_digi_dai), +}; + +static int snd_rpi_iqaudio_digi_probe(struct platform_device *pdev) +{ + struct snd_soc_card *card = &snd_rpi_iqaudio_digi; + char *prefix = "wm8804-digi,"; + char prop[128]; + struct device_node *np; + int ret = 0; + + snd_rpi_iqaudio_digi.dev = &pdev->dev; + + np = pdev->dev.of_node; + if (np) { + struct snd_soc_dai_link *dai = &snd_rpi_iqaudio_digi_dai[0]; + struct device_node *i2s_node; + + i2s_node = of_parse_phandle(np, "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; + } + + snprintf(prop, sizeof(prop), "%scard-name", prefix); + of_property_read_string(np, prop, &card->name); + + snprintf(prop, sizeof(prop), "%sdai-name", prefix); + of_property_read_string(np, prop, &dai->name); + + snprintf(prop, sizeof(prop), "%sdai-stream-name", prefix); + of_property_read_string(np, prop, &dai->stream_name); + } + + ret = snd_soc_register_card(card); + if (ret) + dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", + ret); + + return ret; +} + +static int snd_rpi_iqaudio_digi_remove(struct platform_device *pdev) +{ + return snd_soc_unregister_card(&snd_rpi_iqaudio_digi); +} + +static const struct of_device_id snd_rpi_iqaudio_digi_of_match[] = { + { .compatible = "iqaudio,wm8804-digi", }, + {}, +}; +MODULE_DEVICE_TABLE(of, snd_rpi_iqaudio_digi_of_match); + +static struct platform_driver snd_rpi_iqaudio_digi_driver = { + .driver = { + .name = "IQAudIODigi", + .owner = THIS_MODULE, + .of_match_table = snd_rpi_iqaudio_digi_of_match, + }, + .probe = snd_rpi_iqaudio_digi_probe, + .remove = snd_rpi_iqaudio_digi_remove, +}; + +module_platform_driver(snd_rpi_iqaudio_digi_driver); + +MODULE_AUTHOR("Daniel Matuschek "); +MODULE_DESCRIPTION("ASoC Driver for IQAudIO WM8804 Digi"); +MODULE_LICENSE("GPL v2");