+++ /dev/null
-From 8d203b91f4f8f8d582eb5c382357fe1e6d1d96d1 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 | 7 +++
- sound/soc/bcm/Makefile | 4 ++
- sound/soc/bcm/hifiberry_dac.c | 122 ++++++++++++++++++++++++++++++++++++++++++
- 3 files changed, 133 insertions(+)
- create mode 100644 sound/soc/bcm/hifiberry_dac.c
-
---- a/sound/soc/bcm/Kconfig
-+++ b/sound/soc/bcm/Kconfig
-@@ -7,3 +7,10 @@ config SND_BCM2835_SOC_I2S
- Say Y or M if you want to add support for codecs attached to
- the BCM2835 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
-@@ -3,3 +3,7 @@ snd-soc-bcm2835-i2s-objs := bcm2835-i2s.
-
- obj-$(CONFIG_SND_BCM2835_SOC_I2S) += snd-soc-bcm2835-i2s.o
-
-+# BCM2708 Machine Support
-+snd-soc-hifiberry-dac-objs := hifiberry_dac.o
-+
-+obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
---- /dev/null
-+++ b/sound/soc/bcm/hifiberry_dac.c
-@@ -0,0 +1,122 @@
-+/*
-+ * 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;
-+
-+ 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