ASoC: Add gva codec driver

Change-Id: Ifc1e49750e9b203681780b5400f9f1d7acf6afe4
Signed-off-by: Li Dongqiang <david.li@rock-chips.com>

Documentation/devicetree/bindings/sound/gva-codec.txt

@@ -0,0 +1,14 @@
+ GVA audio virtual codec
+
+This device support generic audio link.
+
+Required properties:
+
+  - compatible : "rockchip,gva-codec"
+
+Example:
+
+codec: gva_codec {
+	compatible = "rockchip,gva-codec";
+	#sound-dai-cells = <0>;
+};

sound/soc/codecs/Kconfig

@@ -502,6 +502,9 @@ config SND_SOC_ES8396
 config SND_SOC_GTM601
 	tristate 'GTM601 UMTS modem audio codec'
 
+config SND_SOC_GVA_CODEC
+	tristate "gva codec"
+
 config SND_SOC_ICS43432
 	tristate
 

sound/soc/codecs/Makefile

@@ -65,6 +65,7 @@ snd-soc-es8328-spi-objs := es8328-spi.o
 snd-soc-es8396-objs := es8396.o
 snd-soc-fm1288-objs := fm1288.o
 snd-soc-gtm601-objs := gtm601.o
+snd-soc-gva-codec-objs := gva_codec.o
 snd-soc-ics43432-objs := ics43432.o
 snd-soc-isabelle-objs := isabelle.o
 snd-soc-jz4740-codec-objs := jz4740.o
@@ -272,6 +273,7 @@ obj-$(CONFIG_SND_SOC_ES8328_SPI)+= snd-soc-es8328-spi.o
 obj-$(CONFIG_SND_SOC_ES8396)	+= snd-soc-es8396.o
 obj-$(CONFIG_SND_SOC_FM1288)	+= snd-soc-fm1288.o
 obj-$(CONFIG_SND_SOC_GTM601)    += snd-soc-gtm601.o
+obj-$(CONFIG_SND_SOC_GVA_CODEC)	+= snd-soc-gva-codec.o
 obj-$(CONFIG_SND_SOC_ICS43432)	+= snd-soc-ics43432.o
 obj-$(CONFIG_SND_SOC_ISABELLE)	+= snd-soc-isabelle.o
 obj-$(CONFIG_SND_SOC_JZ4740_CODEC)	+= snd-soc-jz4740-codec.o

sound/soc/codecs/gva_codec.c

@@ -0,0 +1,93 @@
+/*
+ * Driver for virtual codec
+ *
+ * Copyright (C) 2017 Rockchip Electronics Co., Ltd.
+ * Author: Li Dongqiang <David.li@rock-chips.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <sound/soc.h>
+
+static const struct snd_soc_dapm_widget gva_codec_widgets[] = {
+	SND_SOC_DAPM_INPUT("RX"),
+	SND_SOC_DAPM_OUTPUT("TX"),
+};
+
+static const struct snd_soc_dapm_route gva_codec_routes[] = {
+	{ "Capture", NULL, "RX" },
+	{ "TX", NULL, "Playback" },
+};
+
+#define gva_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
+			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
+
+static struct snd_soc_dai_driver gva_codec_dai = {
+	.name = "gva_codec",
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_8000_192000,
+		.formats = gva_FORMATS,
+	},
+	.capture = {
+		.stream_name = "Capture",
+		.channels_min = 1,
+		.channels_max = 8,
+		.rates = SNDRV_PCM_RATE_8000_192000,
+		.formats = gva_FORMATS,
+	},
+};
+
+static struct snd_soc_codec_driver soc_codec_dev_gva_codec = {
+	.dapm_widgets = gva_codec_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(gva_codec_widgets),
+	.dapm_routes = gva_codec_routes,
+	.num_dapm_routes = ARRAY_SIZE(gva_codec_routes),
+};
+
+static int gva_codec_probe(struct platform_device *pdev)
+{
+	return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_gva_codec,
+			&gva_codec_dai, 1);
+}
+
+static int gva_codec_remove(struct platform_device *pdev)
+{
+	snd_soc_unregister_codec(&pdev->dev);
+
+	return 0;
+}
+
+static const struct of_device_id gva_codec_of_match[] = {
+	{ .compatible = "rockchip,gva-codec", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, gva_codec_of_match);
+
+static struct platform_driver gva_codec_driver = {
+	.driver = {
+		.name = "gva_codec",
+		.of_match_table = of_match_ptr(gva_codec_of_match),
+	},
+	.probe = gva_codec_probe,
+	.remove = gva_codec_remove,
+};
+
+module_platform_driver(gva_codec_driver);
+
+MODULE_AUTHOR("Li Dongqiang <David.li@rock-chips.com>");
+MODULE_DESCRIPTION("ASoC gva virtual driver");
+MODULE_LICENSE("GPL");