--- /dev/null
+From e6a023d12a233e5866e716d82aa4dd5464e8e145 Mon Sep 17 00:00:00 2001
+From: DigitalDreamtime <clive.messer@digitaldreamtime.co.uk>
+Date: Thu, 30 Jun 2016 18:38:42 +0100
+Subject: [PATCH 076/454] 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 <clive.messer@digitaldreamtime.co.uk>
+---
+ 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
+@@ -81,6 +81,13 @@ 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
+@@ -19,6 +19,7 @@ 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
+
+@@ -32,6 +33,7 @@ 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 <info@crazy-audio.com>
++ * based on the HifiBerry DAC driver by Florian Meier <florian.meier@koalo.de>
++ * 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 <linux/module.h>
++#include <linux/platform_device.h>
++
++#include <sound/core.h>
++#include <sound/pcm.h>
++#include <sound/pcm_params.h>
++#include <sound/soc.h>
++#include <sound/jack.h>
++
++#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 && ret != -EPROBE_DEFER)
++ 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 <info@crazy-audio.com>");
++MODULE_DESCRIPTION("ASoC Driver for IQAudIO WM8804 Digi");
++MODULE_LICENSE("GPL v2");
projects / openwrt / staging / chunkeey.git / blobdiff