ASoC: fsl_sai_wm9712: add machine driver for WM9712 codec

Add machine driver for Wolfson WM9712 AC97 codec connected to
Freescale SAI SoC audio transceiver. This combination needs
software emulated AC97 which is done by the fsl_sai_ac97
driver.

3 files changed, 138 insertions, 0 deletions

diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index 1df1f7046e0b..e533dc11bba4 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -219,6 +219,14 @@ config SND_SOC_PHYCORE_AC97
 	  Say Y if you want to add support for SoC audio on Phytec phyCORE
 	  and phyCARD boards in AC97 mode
 
+config SND_SOC_FSL_SAI_WM9712
+	tristate "SoC Audio support for Freescale SoC's using SAI and WM9712 codec"
+	select SND_SOC_FSL_SAI
+	select SND_SOC_WM9712
+	help
+	  Say Y or M here if you want to add support for SoC audio on Freescale
+	  SoC using SAI and the WM9712 (or compatible) codec.
+
 config SND_SOC_EUKREA_TLV320
 	tristate "Eukrea TLV320"
 	depends on ARCH_MXC && I2C
diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
index 6aeb886e3864..43f5da761675 100644
--- a/sound/soc/fsl/Makefile
+++ b/sound/soc/fsl/Makefile
@@ -60,6 +60,7 @@ snd-soc-imx-mc13783-objs := imx-mc13783.o
 
 obj-$(CONFIG_SND_SOC_EUKREA_TLV320) += snd-soc-eukrea-tlv320.o
 obj-$(CONFIG_SND_SOC_PHYCORE_AC97) += snd-soc-phycore-ac97.o
+obj-$(CONFIG_SND_SOC_FSL_SAI_WM9712) += fsl_sai_wm9712.o
 obj-$(CONFIG_SND_SOC_MX27VIS_AIC32X4) += snd-soc-mx27vis-aic32x4.o
 obj-$(CONFIG_SND_MXC_SOC_WM1133_EV1) += snd-soc-wm1133-ev1.o
 obj-$(CONFIG_SND_SOC_IMX_ES8328) += snd-soc-imx-es8328.o
diff --git a/sound/soc/fsl/fsl_sai_wm9712.c b/sound/soc/fsl/fsl_sai_wm9712.c
new file mode 100644
index 000000000000..c510395649d5
--- /dev/null
+++ b/sound/soc/fsl/fsl_sai_wm9712.c
@@ -0,0 +1,129 @@
+/*
+ * fsl_sai_wm9712.c  --  SoC audio for Freescale SAI
+ *
+ * Copyright 2014 Stefan Agner, Toradex AG <stefan@agner.ch>
+ *
+ *  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/module.h>
+#include <sound/soc.h>
+
+#define DRV_NAME "fsl-sai-ac97-dt-driver"
+
+static struct snd_soc_dai_link fsl_sai_wm9712_dai = {
+	.name = "AC97 HiFi",
+	.stream_name = "AC97 HiFi",
+	.codec_dai_name = "wm9712-hifi",
+	.codec_name = "wm9712-codec",
+};
+
+static const struct snd_soc_dapm_widget tegra_wm9712_dapm_widgets[] = {
+	SND_SOC_DAPM_HP("Headphone", NULL),
+	SND_SOC_DAPM_LINE("LineIn", NULL),
+	SND_SOC_DAPM_MIC("Mic", NULL),
+};
+
+
+static struct snd_soc_card snd_soc_card_fsl_sai_wm9712 = {
+	.name = "Colibri VF61 AC97 Audio",
+	.owner = THIS_MODULE,
+	.dai_link = &fsl_sai_wm9712_dai,
+	.num_links = 1,
+
+	.dapm_widgets = tegra_wm9712_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(tegra_wm9712_dapm_widgets),
+	.fully_routed = true,
+};
+
+static struct platform_device *codec;
+
+static int fsl_sai_wm9712_driver_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct snd_soc_card *card = &snd_soc_card_fsl_sai_wm9712;
+	int ret;
+
+	card->dev = &pdev->dev;
+	platform_set_drvdata(pdev, card);
+
+	codec = platform_device_alloc("wm9712-codec", -1);
+	if (!codec)
+		return -ENOMEM;
+
+	ret = platform_device_add(codec);
+	if (ret)
+		goto codec_put;
+
+	ret = snd_soc_of_parse_card_name(card, "fsl,model");
+	if (ret)
+		goto codec_unregister;
+
+	ret = snd_soc_of_parse_audio_routing(card, "fsl,audio-routing");
+	if (ret)
+		goto codec_unregister;
+
+	fsl_sai_wm9712_dai.cpu_of_node = of_parse_phandle(np,
+				       "fsl,ac97-controller", 0);
+	if (!fsl_sai_wm9712_dai.cpu_of_node) {
+		dev_err(&pdev->dev,
+			"Property 'fsl,ac97-controller' missing or invalid\n");
+		ret = -EINVAL;
+		goto codec_unregister;
+	}
+
+	fsl_sai_wm9712_dai.platform_of_node = fsl_sai_wm9712_dai.cpu_of_node;
+
+	ret = snd_soc_register_card(card);
+	if (ret) {
+		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
+			ret);
+	}
+
+	return ret;
+
+codec_unregister:
+	platform_device_del(codec);
+
+codec_put:
+	platform_device_put(codec);
+	return ret;
+}
+
+static int fsl_sai_wm9712_driver_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+	snd_soc_unregister_card(card);
+
+	platform_device_unregister(codec);
+
+	return 0;
+}
+
+static const struct of_device_id fsl_sai_wm9712_of_match[] = {
+	{ .compatible = "fsl,fsl-sai-audio-wm9712", },
+	{},
+};
+
+static struct platform_driver fsl_sai_wm9712_driver = {
+	.driver = {
+		.name = DRV_NAME,
+		.owner = THIS_MODULE,
+		.pm = &snd_soc_pm_ops,
+		.of_match_table = fsl_sai_wm9712_of_match,
+	},
+	.probe = fsl_sai_wm9712_driver_probe,
+	.remove = fsl_sai_wm9712_driver_remove,
+};
+module_platform_driver(fsl_sai_wm9712_driver);
+
+/* Module information */
+MODULE_AUTHOR("Stefan Agner <stefan@agner.ch>");
+MODULE_DESCRIPTION("ALSA SoC Freescale SAI+WM9712");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(of, fsl_sai_wm9712_of_match);