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authorJames <>2015-11-04 11:49:21 +0000
committerJames <>2015-11-04 11:49:21 +0000
commit716ca530e1c4515d8683c9d5be3d56b301758b66 (patch)
tree700eb5bcc1a462a5f21dcec15ce7c97ecfefa772 /target/linux/brcm2708/patches-4.1/0037-ASoC-Add-support-for-HifiBerry-DAC.patch
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Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0037-ASoC-Add-support-for-HifiBerry-DAC.patch')
-rw-r--r--target/linux/brcm2708/patches-4.1/0037-ASoC-Add-support-for-HifiBerry-DAC.patch144
1 files changed, 144 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0037-ASoC-Add-support-for-HifiBerry-DAC.patch b/target/linux/brcm2708/patches-4.1/0037-ASoC-Add-support-for-HifiBerry-DAC.patch
new file mode 100644
index 0000000..66aa907
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.1/0037-ASoC-Add-support-for-HifiBerry-DAC.patch
@@ -0,0 +1,144 @@
+From 1c2bf7278b4ac192fed80b01b404a2d44b68b124 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 037/203] 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 | 7 +++
+ sound/soc/bcm/Makefile | 5 +++
+ sound/soc/bcm/hifiberry_dac.c | 100 ++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 112 insertions(+)
+ create mode 100644 sound/soc/bcm/hifiberry_dac.c
+
+--- a/sound/soc/bcm/Kconfig
++++ b/sound/soc/bcm/Kconfig
+@@ -18,3 +18,10 @@ config SND_BCM2708_SOC_I2S
+ Say Y or M if you want to add support for codecs attached to
+ the BCM2708 I2S interface. You will also need
+ to select the audio interfaces to support below.
++
++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
+@@ -7,3 +7,8 @@ obj-$(CONFIG_SND_BCM2835_SOC_I2S) += snd
+ snd-soc-bcm2708-i2s-objs := bcm2708-i2s.o
+
+ obj-$(CONFIG_SND_BCM2708_SOC_I2S) += snd-soc-bcm2708-i2s.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 +1,100 @@
++/*
++ * 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",
++ .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;
++ 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 struct platform_driver snd_rpi_hifiberry_dac_driver = {
++ .driver = {
++ .name = "snd-hifiberry-dac",
++ .owner = THIS_MODULE,
++ },
++ .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");