diff options
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.patch | 144 |
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"); |