[alsa-devel] [PATCH v2 3/7] ASoC: hda - add soc hda codec driver wrapper

[Vinod Koul]

From: Jeeja KP <jeeja.kp at intel.com>

This provides match function for ASoC
codec driver based on id_table and driver
register/unregister wrapper functions

Signed-off-by: Jeeja KP <jeeja.kp at intel.com>
Signed-off-by: Vinod Koul <vinod.koul at intel.com>
---
 sound/soc/codecs/Kconfig         |    3 ++
 sound/soc/codecs/Makefile        |    2 +
 sound/soc/codecs/soc-hda-codec.c |   79 ++++++++++++++++++++++++++++++++++++++
 sound/soc/codecs/soc-hda-codec.h |   43 +++++++++++++++++++++
 4 files changed, 127 insertions(+)
 create mode 100644 sound/soc/codecs/soc-hda-codec.c
 create mode 100644 sound/soc/codecs/soc-hda-codec.h

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 061c46587628..4ce30ded2c9c 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -444,6 +444,9 @@ config SND_SOC_ES8328_SPI
 	tristate
 	select SND_SOC_ES8328
 
+config SND_SOC_HDA_CODEC
+	tristate "ASOC HDA Codec Core"
+
 config SND_SOC_ISABELLE
         tristate
 
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index abe2d7edf65c..5685ec556942 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -55,6 +55,7 @@ snd-soc-dmic-objs := dmic.o
 snd-soc-es8328-objs := es8328.o
 snd-soc-es8328-i2c-objs := es8328-i2c.o
 snd-soc-es8328-spi-objs := es8328-spi.o
+snd-soc-hda-codec-objs := soc-hda-codec.o
 snd-soc-isabelle-objs := isabelle.o
 snd-soc-jz4740-codec-objs := jz4740.o
 snd-soc-l3-objs := l3.o
@@ -240,6 +241,7 @@ obj-$(CONFIG_SND_SOC_DMIC)	+= snd-soc-dmic.o
 obj-$(CONFIG_SND_SOC_ES8328)	+= snd-soc-es8328.o
 obj-$(CONFIG_SND_SOC_ES8328_I2C)+= snd-soc-es8328-i2c.o
 obj-$(CONFIG_SND_SOC_ES8328_SPI)+= snd-soc-es8328-spi.o
+obj-$(CONFIG_SND_SOC_HDA_CODEC)	+= snd-soc-hda-codec.o
 obj-$(CONFIG_SND_SOC_ISABELLE)	+= snd-soc-isabelle.o
 obj-$(CONFIG_SND_SOC_JZ4740_CODEC)	+= snd-soc-jz4740-codec.o
 obj-$(CONFIG_SND_SOC_L3)	+= snd-soc-l3.o
diff --git a/sound/soc/codecs/soc-hda-codec.c b/sound/soc/codecs/soc-hda-codec.c
new file mode 100644
index 000000000000..46bfddd87a7c
--- /dev/null
+++ b/sound/soc/codecs/soc-hda-codec.c
@@ -0,0 +1,79 @@
+/*
+ * soc-hda-codec.c ASoC High Definition Audio Codec interface Definitions
+ *
+ * Copyright (c) 2014-2015 Intel Corporation
+ *
+ * Author(s): Jeeja KP <jeeja.kp at intel.com>
+ *
+ *
+ *  This driver 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.
+ *
+ *  This driver 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 <sound/hdaudio.h>
+#include "soc-hda-codec.h"
+
+
+/*
+ * find a matching vendor id
+ */
+static int hda_codec_match(struct hdac_device *dev, struct hdac_driver *drv)
+{
+	struct hda_soc_codec_driver *driver =
+		container_of(drv, struct hda_soc_codec_driver, core);
+
+	if (driver->id_table) {
+		const struct hda_soc_device_id *id  = driver->id_table;
+
+		while (id->name[0]) {
+			if (dev->vendor_id == id->id)
+				return 1;
+			id++;
+		}
+	}
+	return 0;
+}
+
+int snd_soc_hda_codec_driver_register(struct hda_soc_codec_driver *drv)
+{
+	drv->core.driver.bus = &snd_hda_bus_type;
+	drv->core.type = HDA_DEV_ASOC;
+	drv->core.match = hda_codec_match;
+	return driver_register(&drv->core.driver);
+}
+EXPORT_SYMBOL_GPL(snd_soc_hda_codec_driver_register);
+
+void snd_soc_hda_codec_driver_unregister(struct hda_soc_codec_driver *drv)
+{
+	driver_unregister(&drv->core.driver);
+}
+EXPORT_SYMBOL_GPL(snd_soc_hda_codec_driver_unregister);
+
+const struct hda_soc_device_id *
+snd_soc_hda_get_device_id(
+			struct hdac_device *hdev,
+			struct hda_soc_codec_driver *drv)
+{
+	if (drv->id_table) {
+		const struct hda_soc_device_id *id  = drv->id_table;
+
+		while (id->name[0]) {
+			if (hdev->vendor_id == id->id)
+				return id;
+			id++;
+		}
+	}
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_hda_get_device_id);
+
+MODULE_DESCRIPTION("ASoC HDA codec core");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/codecs/soc-hda-codec.h b/sound/soc/codecs/soc-hda-codec.h
new file mode 100644
index 000000000000..6c2d107049bb
--- /dev/null
+++ b/sound/soc/codecs/soc-hda-codec.h
@@ -0,0 +1,43 @@
+/*
+ * ASoC High Definition Audio Codec interface
+ *
+ * Copyright (c) 2015 Intel Corporation
+ *
+ * Author(s): Jeeja KP <jeeja.kp at intel.com>
+ *
+ *  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.
+ *
+ *  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 <sound/hdaudio.h>
+
+/*HDA device table*/
+#define HDA_NAME_SIZE      20
+struct hda_soc_device_id {
+	__u32 id;
+	char name[HDA_NAME_SIZE];
+	unsigned long driver_data;
+};
+
+struct hda_soc_codec_driver {
+	struct hdac_driver core;
+	const struct hda_soc_device_id *id_table;
+};
+
+#define to_hdac_driver(drv) (container_of((drv), \
+				 struct hdac_driver, driver))
+#define to_hda_soc_codec_driver(hdrv) (container_of((hdrv), \
+				 struct hda_soc_codec_driver, core))
+
+int snd_soc_hda_codec_driver_register(struct hda_soc_codec_driver *drv);
+void snd_soc_hda_codec_driver_unregister(struct hda_soc_codec_driver *drv);
+const struct hda_soc_device_id *snd_soc_hda_get_device_id(struct hdac_device *hdev,
+				struct hda_soc_codec_driver *drv);
-- 
1.7.9.5