--- /dev/null
+From c9f07d6d39019ae80e97e0d1cf070a78c4a6c974 Mon Sep 17 00:00:00 2001
+From: Florian Meier <florian.meier@koalo.de>
+Date: Fri, 22 Nov 2013 19:19:08 +0100
+Subject: [PATCH] ASoC: Add support for HifiBerry DAC
+
+This adds a machine driver for the HifiBerry DAC.
+It is a sound card that can
+be stacked onto the Raspberry Pi.
+
+Signed-off-by: Florian Meier <florian.meier@koalo.de>
+---
+ sound/soc/bcm/Kconfig | 9 ++-
+ sound/soc/bcm/Makefile | 4 ++
+ sound/soc/bcm/hifiberry_dac.c | 124 ++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 136 insertions(+), 1 deletion(-)
+ create mode 100644 sound/soc/bcm/hifiberry_dac.c
+
+--- a/sound/soc/bcm/Kconfig
++++ b/sound/soc/bcm/Kconfig
+@@ -15,4 +15,11 @@ config SND_SOC_CYGNUS
+ Say Y if you want to add support for ASoC audio on Broadcom
+ Cygnus chips (bcm958300, bcm958305, bcm911360)
+
+- If you don't know what to do here, say N.
+\ No newline at end of file
++ If you don't know what to do here, say N.
++
++config SND_BCM2708_SOC_HIFIBERRY_DAC
++ tristate "Support for HifiBerry DAC"
++ depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
++ select SND_SOC_PCM5102A
++ help
++ Say Y or M if you want to add support for HifiBerry DAC.
+--- a/sound/soc/bcm/Makefile
++++ b/sound/soc/bcm/Makefile
+@@ -8,3 +8,7 @@ snd-soc-cygnus-objs := cygnus-pcm.o cygn
+
+ obj-$(CONFIG_SND_SOC_CYGNUS) += snd-soc-cygnus.o
+
++# BCM2708 Machine Support
++snd-soc-hifiberry-dac-objs := hifiberry_dac.o
++
++obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
+--- /dev/null
++++ b/sound/soc/bcm/hifiberry_dac.c
+@@ -0,0 +1,124 @@
++/*
++ * ASoC Driver for HifiBerry DAC
++ *
++ * Author: 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>
++
++static int snd_rpi_hifiberry_dac_init(struct snd_soc_pcm_runtime *rtd)
++{
++ return 0;
++}
++
++static int snd_rpi_hifiberry_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_rpi_hifiberry_dac_ops = {
++ .hw_params = snd_rpi_hifiberry_dac_hw_params,
++};
++
++static struct snd_soc_dai_link snd_rpi_hifiberry_dac_dai[] = {
++{
++ .name = "HifiBerry DAC",
++ .stream_name = "HifiBerry DAC HiFi",
++ .cpu_dai_name = "bcm2708-i2s.0",
++ .codec_dai_name = "pcm5102a-hifi",
++ .platform_name = "bcm2708-i2s.0",
++ .codec_name = "pcm5102a-codec",
++ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
++ SND_SOC_DAIFMT_CBS_CFS,
++ .ops = &snd_rpi_hifiberry_dac_ops,
++ .init = snd_rpi_hifiberry_dac_init,
++},
++};
++
++/* audio machine driver */
++static struct snd_soc_card snd_rpi_hifiberry_dac = {
++ .name = "snd_rpi_hifiberry_dac",
++ .driver_name = "HifiberryDac",
++ .owner = THIS_MODULE,
++ .dai_link = snd_rpi_hifiberry_dac_dai,
++ .num_links = ARRAY_SIZE(snd_rpi_hifiberry_dac_dai),
++};
++
++static int snd_rpi_hifiberry_dac_probe(struct platform_device *pdev)
++{
++ int ret = 0;
++
++ snd_rpi_hifiberry_dac.dev = &pdev->dev;
++
++ if (pdev->dev.of_node) {
++ struct device_node *i2s_node;
++ struct snd_soc_dai_link *dai = &snd_rpi_hifiberry_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;
++ }
++ }
++
++ ret = snd_soc_register_card(&snd_rpi_hifiberry_dac);
++ if (ret)
++ dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
++
++ return ret;
++}
++
++static int snd_rpi_hifiberry_dac_remove(struct platform_device *pdev)
++{
++ return snd_soc_unregister_card(&snd_rpi_hifiberry_dac);
++}
++
++static const struct of_device_id snd_rpi_hifiberry_dac_of_match[] = {
++ { .compatible = "hifiberry,hifiberry-dac", },
++ {},
++};
++MODULE_DEVICE_TABLE(of, snd_rpi_hifiberry_dac_of_match);
++
++static struct platform_driver snd_rpi_hifiberry_dac_driver = {
++ .driver = {
++ .name = "snd-hifiberry-dac",
++ .owner = THIS_MODULE,
++ .of_match_table = snd_rpi_hifiberry_dac_of_match,
++ },
++ .probe = snd_rpi_hifiberry_dac_probe,
++ .remove = snd_rpi_hifiberry_dac_remove,
++};
++
++module_platform_driver(snd_rpi_hifiberry_dac_driver);
++
++MODULE_AUTHOR("Florian Meier <florian.meier@koalo.de>");
++MODULE_DESCRIPTION("ASoC Driver for HifiBerry DAC");
++MODULE_LICENSE("GPL v2");
projects / openwrt / staging / yousong.git / blobdiff