ENGR00277299-5 ASoC: fsl: Add hdmi audio machine driver

Add hdmi audio machine dirver

Signed-off-by: Nicolin Chen <b42378@freescale.com>

3 files changed, 139 insertions, 0 deletions

diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index cea06709e92e..8d1822df94c6 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -240,6 +240,17 @@ config SND_SOC_IMX_MC13783
         select SND_SOC_MC13783
         select SND_SOC_IMX_PCM_DMA
 
+config SND_SOC_IMX_HDMI
+        tristate "SoC Audio support for i.MX boards with HDMI port"
+        depends on MFD_MXC_HDMI
+        select SND_SOC_IMX_HDMI_DMA
+        select SND_SOC_FSL_HDMI
+        select SND_SOC_OMAP_HDMI_CODEC
+        help
+          SoC Audio support for i.MX boards with HDMI audio
+          Say Y if you want to add support for SoC audio on an i.MX board with
+          IMX HDMI.
+
 config SND_SOC_IMX_SI476X
         tristate "SoC Audio support for i.MX boards with si476x"
         select SND_SOC_IMX_PCM_DMA
diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
index 21a51cfbf332..f651c9e081d9 100644
--- a/sound/soc/fsl/Makefile
+++ b/sound/soc/fsl/Makefile
@@ -57,6 +57,7 @@ snd-soc-imx-sgtl5000-objs := imx-sgtl5000.o
 snd-soc-imx-wm8962-objs := imx-wm8962.o
 snd-soc-imx-spdif-objs :=imx-spdif.o
 snd-soc-imx-mc13783-objs := imx-mc13783.o
+snd-soc-imx-hdmi-objs := imx-hdmi.o
 snd-soc-imx-si476x-objs := imx-si476x.o
 
 obj-$(CONFIG_SND_SOC_EUKREA_TLV320) += snd-soc-eukrea-tlv320.o
@@ -68,4 +69,5 @@ obj-$(CONFIG_SND_SOC_IMX_SGTL5000) += snd-soc-imx-sgtl5000.o
 obj-$(CONFIG_SND_SOC_IMX_WM8962) += snd-soc-imx-wm8962.o
 obj-$(CONFIG_SND_SOC_IMX_SPDIF) += snd-soc-imx-spdif.o
 obj-$(CONFIG_SND_SOC_IMX_MC13783) += snd-soc-imx-mc13783.o
+obj-$(CONFIG_SND_SOC_IMX_HDMI) += snd-soc-imx-hdmi.o
 obj-$(CONFIG_SND_SOC_IMX_SI476X) += snd-soc-imx-si476x.o
diff --git a/sound/soc/fsl/imx-hdmi.c b/sound/soc/fsl/imx-hdmi.c
new file mode 100644
index 000000000000..04fcff8cca6e
--- /dev/null
+++ b/sound/soc/fsl/imx-hdmi.c
@@ -0,0 +1,126 @@
+/*
+ * ASoC HDMI Transmitter driver for IMX development boards
+ *
+ * Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
+ *
+ * based on stmp3780_devb_hdmi.c
+ *
+ * Vladimir Barinov <vbarinov@embeddedalley.com>
+ *
+ * Copyright 2008 SigmaTel, Inc
+ * Copyright 2008 Embedded Alley Solutions, Inc
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2.  This program  is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/mfd/mxc-hdmi-core.h>
+#include <sound/soc.h>
+
+#include "imx-hdmi.h"
+
+/* imx digital audio interface glue - connects codec <--> CPU */
+static struct snd_soc_dai_link imx_hdmi_dai_link = {
+        .name = "i.MX HDMI Audio Tx",
+        .stream_name = "i.MX HDMI Audio Tx",
+        .codec_dai_name = "hdmi-hifi",
+        .codec_name = "hdmi-audio-codec",
+        .platform_name = "imx-hdmi-audio",
+};
+
+static struct snd_soc_card snd_soc_card_imx_hdmi = {
+        .name = "imx-hdmi-soc",
+        .dai_link = &imx_hdmi_dai_link,
+        .num_links = 1,
+};
+
+static struct platform_device *codec_dev;
+
+static int imx_hdmi_audio_probe(struct platform_device *pdev)
+{
+        struct device_node *hdmi_np, *np = pdev->dev.of_node;
+        struct snd_soc_card *card = &snd_soc_card_imx_hdmi;
+        struct platform_device *hdmi_pdev;
+        int ret = 0;
+
+        if (!hdmi_get_registered()) {
+                dev_err(&pdev->dev, "initialize HDMI-audio failed. load HDMI-video first!\n");
+                return -ENODEV;
+        }
+
+        hdmi_np = of_parse_phandle(np, "hdmi-controller", 0);
+        if (!hdmi_np) {
+                dev_err(&pdev->dev, "failed to find hdmi-audio cpudai\n");
+                ret = -EINVAL;
+                goto end;
+        }
+
+        hdmi_pdev = of_find_device_by_node(hdmi_np);
+        if (!hdmi_pdev) {
+                dev_err(&pdev->dev, "failed to find SSI platform device\n");
+                ret = -EINVAL;
+                goto end;
+        }
+
+        codec_dev = platform_device_register_simple("hdmi-audio-codec", -1, NULL, 0);
+        if (IS_ERR(codec_dev)) {
+                dev_err(&pdev->dev, "failed to register HDMI audio codec\n");
+                ret = PTR_ERR(codec_dev);
+                goto end;
+        }
+
+        card->dev = &pdev->dev;
+        card->dai_link->cpu_dai_name = dev_name(&hdmi_pdev->dev);
+
+        ret = snd_soc_register_card(card);
+        if (ret) {
+                dev_err(&pdev->dev, "failed to register card: %d\n", ret);
+                goto err_card;
+        }
+
+        goto end;
+
+err_card:
+        platform_device_unregister(codec_dev);
+end:
+        if (hdmi_np)
+                of_node_put(hdmi_np);
+
+        return ret;
+}
+
+static int imx_hdmi_audio_remove(struct platform_device *pdev)
+{
+        struct snd_soc_card *card = &snd_soc_card_imx_hdmi;
+
+        platform_device_unregister(codec_dev);
+        snd_soc_unregister_card(card);
+
+        return 0;
+}
+
+static const struct of_device_id imx_hdmi_dt_ids[] = {
+        { .compatible = "fsl,imx-audio-hdmi", },
+        { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_hdmi_dt_ids);
+
+static struct platform_driver imx_hdmi_audio_driver = {
+        .probe = imx_hdmi_audio_probe,
+        .remove = imx_hdmi_audio_remove,
+        .driver = {
+                .of_match_table = imx_hdmi_dt_ids,
+                .name = "imx-audio-hdmi",
+                .owner = THIS_MODULE,
+        },
+};
+
+module_platform_driver(imx_hdmi_audio_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("IMX HDMI TX ASoC driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:imx-audio-hdmi");