ASoC: Add support and bcm2708 drivers for PCM5102A

arch/arm/mach-bcm2708/bcm2708.c

@@ -736,6 +736,20 @@ static struct platform_device snd_rpi_ess9018_codec_device = {
 };
 #endif
 
+#ifdef CONFIG_SND_BCM2708_SOC_RPI_CODEC_PCM5102A_MODULE
+static struct platform_device snd_rpi_pcm5102a_device = {
+	.name = "snd-rpi-pcm5102a",
+	.id = 0,
+	.num_resources = 0,
+};
+
+static struct platform_device snd_rpi_pcm5102a_codec_device = {
+	.name = "pcm5102a-codec",
+	.id = -1,
+	.num_resources = 0,
+};
+#endif
+
 int __init bcm_register_device(struct platform_device *pdev)
 {
 	int ret;
@@ -854,6 +868,11 @@ void __init bcm2708_init(void)
 	bcm_register_device(&snd_rpi_ess9018_codec_device);
 #endif
 
+#ifdef CONFIG_SND_BCM2708_SOC_RPI_CODEC_PCM5102A_MODULE
+	bcm_register_device(&snd_rpi_pcm5102a_device);
+	bcm_register_device(&snd_rpi_pcm5102a_codec_device);
+#endif
+
 	for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
 		struct amba_device *d = amba_devs[i];
 		amba_device_register(d, &iomem_resource);

sound/soc/bcm2708/Kconfig

@@ -44,3 +44,12 @@ config SND_BCM2708_SOC_RPI_CODEC_ESS9018
 	help
 	  Say Y if you want to add support for ESS9018
 
+config SND_BCM2708_SOC_RPI_CODEC_PCM5102A
+	tristate "Support for PCM5102A"
+	depends on SND_BCM2708_SOC
+	select SND_BCM2708_SOC_I2S
+	select SND_SOC_PCM5102A
+	help
+	  Say Y if you want to add support for PCM5102A
+
+

sound/soc/bcm2708/Makefile

@@ -5,6 +5,7 @@ snd-soc-rpi-mbed-objs := rpi-mbed.o
 snd-soc-rpi-tda1541a-objs := rpi-tda1541a.o
 snd-soc-rpi-proto-objs := rpi-proto.o
 snd-soc-rpi-ess9018-objs := rpi-ess9018.o
+snd-soc-rpi-pcm5102a-objs := rpi-pcm5102a.o
 
 obj-$(CONFIG_SND_BCM2708_SOC) += snd-soc-bcm2708.o
 obj-$(CONFIG_SND_BCM2708_SOC_I2S) += snd-soc-bcm2708-i2s.o
@@ -14,4 +15,5 @@ obj-$(CONFIG_SND_BCM2708_SOC_RPI_CODEC_MBED) += snd-soc-rpi-mbed.o
 obj-$(CONFIG_SND_BCM2708_SOC_RPI_CODEC_TDA1541A) += snd-soc-rpi-tda1541a.o
 obj-$(CONFIG_SND_BCM2708_SOC_RPI_CODEC_PROTO) += snd-soc-rpi-proto.o
 obj-$(CONFIG_SND_BCM2708_SOC_RPI_CODEC_ESS9018) += snd-soc-rpi-ess9018.o
+obj-$(CONFIG_SND_BCM2708_SOC_RPI_CODEC_PCM5102A) += snd-soc-rpi-pcm5102a.o
 

sound/soc/bcm2708/rpi-pcm5102a.c

@@ -0,0 +1,93 @@
+/*
+ * ASoC driver for PCM5102A codec
+ * connected to a Raspberry Pi
+ *
+ * Author:      		Francesco Valla, <[email protected]>
+ * Based on rpi-ess9018.c by: 	Florian Meier, <[email protected]>
+ *              		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.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+
+static int snd_rpi_pcm5102a_init(struct snd_soc_pcm_runtime *rtd)
+{
+	return 0;
+}
+
+static int snd_rpi_pcm5102a_hw_params(struct snd_pcm_substream *substream,
+				       struct snd_pcm_hw_params *params)
+{
+	return 0;
+}
+
+/* machine stream operations */
+static struct snd_soc_ops snd_rpi_pcm5102a_ops = {
+	.hw_params = snd_rpi_pcm5102a_hw_params,
+};
+
+static struct snd_soc_dai_link snd_rpi_pcm5102a_dai[] = {
+{
+	.name		= "PCM5102A",
+	.stream_name	= "PCM5102A HiFi",
+	.cpu_dai_name	= "bcm2708-i2s.0",
+	.codec_dai_name	= "pcm5102a-hifi",
+	.platform_name	= "bcm2708-pcm-audio.0",
+	.codec_name	= "pcm5102a-codec",
+	.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+				SND_SOC_DAIFMT_CBS_CFS,
+	.ops		= &snd_rpi_pcm5102a_ops,
+	.init		= snd_rpi_pcm5102a_init,
+},
+};
+
+/* audio machine driver */
+static struct snd_soc_card snd_rpi_pcm5102a = {
+	.name         = "snd_rpi_pcm5102a",
+	.dai_link     = snd_rpi_pcm5102a_dai,
+	.num_links    = ARRAY_SIZE(snd_rpi_pcm5102a_dai),
+};
+
+static int snd_rpi_pcm5102a_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+
+	snd_rpi_pcm5102a.dev = &pdev->dev;
+	ret = snd_soc_register_card(&snd_rpi_pcm5102a);
+	if (ret)
+        {
+		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
+        }
+
+	return ret;
+}
+
+
+static int snd_rpi_pcm5102a_remove(struct platform_device *pdev)
+{
+	return snd_soc_unregister_card(&snd_rpi_pcm5102a);
+}
+
+static struct platform_driver snd_rpi_pcm5102a_driver = {
+        .driver = {
+                .name   = "snd-rpi-pcm5102a",
+                .owner  = THIS_MODULE,
+        },
+        .probe          = snd_rpi_pcm5102a_probe,
+        .remove         = snd_rpi_pcm5102a_remove,
+};
+
+module_platform_driver(snd_rpi_pcm5102a_driver);
+
+MODULE_AUTHOR("Francesco Valla");
+MODULE_DESCRIPTION("ASoC Driver for Raspberry Pi connected to a PCM5102A");
+MODULE_LICENSE("GPL");

sound/soc/codecs/Kconfig

@@ -54,6 +54,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_ML26124 if I2C
 	select SND_SOC_OMAP_HDMI_CODEC if OMAP4_DSS_HDMI
 	select SND_SOC_PCM3008
+	select SND_SOC_PCM5102A
 	select SND_SOC_RT5631 if I2C
 	select SND_SOC_SGTL5000 if I2C
 	select SND_SOC_SI476X if MFD_SI476X_CORE
@@ -288,6 +289,9 @@ config SND_SOC_OMAP_HDMI_CODEC
 config SND_SOC_PCM3008
        tristate
 
+config SND_SOC_PCM5102A
+       tristate
+
 config SND_SOC_RT5631
 	tristate
 

sound/soc/codecs/Makefile

@@ -42,6 +42,7 @@ snd-soc-mc13783-objs := mc13783.o
 snd-soc-ml26124-objs := ml26124.o
 snd-soc-omap-hdmi-codec-objs := omap-hdmi.o
 snd-soc-pcm3008-objs := pcm3008.o
+snd-soc-pcm5102a-objs := pcm5102a.o 
 snd-soc-rt5631-objs := rt5631.o
 snd-soc-sgtl5000-objs := sgtl5000.o
 snd-soc-alc5623-objs := alc5623.o
@@ -168,6 +169,7 @@ obj-$(CONFIG_SND_SOC_MC13783)	+= snd-soc-mc13783.o
 obj-$(CONFIG_SND_SOC_ML26124)	+= snd-soc-ml26124.o
 obj-$(CONFIG_SND_SOC_OMAP_HDMI_CODEC) += snd-soc-omap-hdmi-codec.o
 obj-$(CONFIG_SND_SOC_PCM3008)	+= snd-soc-pcm3008.o
+obj-$(CONFIG_SND_SOC_PCM5102A)  += snd-soc-pcm5102a.o 
 obj-$(CONFIG_SND_SOC_RT5631)	+= snd-soc-rt5631.o
 obj-$(CONFIG_SND_SOC_SGTL5000)  += snd-soc-sgtl5000.o
 obj-$(CONFIG_SND_SOC_SIGMADSP)	+= snd-soc-sigmadsp.o

sound/soc/codecs/pcm5102a.c

@@ -0,0 +1,61 @@
+/*
+ * Driver for the PCM5102A codec
+ * It is a dummy driver without any controls.
+ *
+ * Copyright 2013
+ * Author: Francesco Valla <[email protected]>
+ * Based on ess9018.c by Florian Meier <[email protected]>
+ * 
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <sound/soc.h>
+
+static struct snd_soc_dai_driver pcm5102a_dai = {
+	.name = "pcm5102a-hifi",
+	.playback = {
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_8000_192000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE
+	},
+};
+
+static struct snd_soc_codec_driver soc_codec_dev_pcm5102a;
+
+static int pcm5102a_probe(struct platform_device *pdev)
+{
+	return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_pcm5102a,
+			&pcm5102a_dai, 1);
+}
+
+static int pcm5102a_remove(struct platform_device *pdev)
+{
+	snd_soc_unregister_codec(&pdev->dev);
+
+	return 0;
+}
+
+static struct platform_driver pcm5102a_codec_driver = {
+	.probe 		= pcm5102a_probe,
+	.remove 	= pcm5102a_remove,
+	.driver		= {
+		.name	= "pcm5102a-codec",
+		.owner	= THIS_MODULE,
+	},
+};
+
+module_platform_driver(pcm5102a_codec_driver);
+
+MODULE_AUTHOR("Francesco Valla <[email protected]>");
+MODULE_DESCRIPTION("ASoC PCM5102A codec driver");
+MODULE_LICENSE("GPL");
+