new file mode 100644
@@ -0,0 +1,46 @@
+#ifndef __SOUND_HDAUDIO_EXT_H
+#define __SOUND_HDAUDIO_EXT_H
+
+#include <sound/hdaudio.h>
+
+/**
+ * hdac_ext_bus: HDAC extended bus for extended HDA caps
+ *
+ * @bus: hdac bus
+ * @num_streams: streams supported
+ * @ppcap: pp capabilities pointer
+ * @spbcap: SPIB capabilities pointer
+ * @mlcap: MultiLink capabilities pointer
+ * @gtscap: gts capabilities pointer
+ * @hlink_list: link list of HDA links
+ */
+struct hdac_ext_bus {
+ struct hdac_bus bus;
+ int num_streams;
+ int idx;
+
+ void __iomem *ppcap;
+ void __iomem *spbcap;
+ void __iomem *mlcap;
+ void __iomem *gtscap;
+
+ struct list_head hlink_list;
+};
+
+int snd_hdac_ext_bus_init(struct hdac_ext_bus *sbus, struct device *dev,
+ const struct hdac_bus_ops *ops,
+ const struct hdac_io_ops *io_ops);
+
+void snd_hdac_ext_bus_exit(struct hdac_ext_bus *sbus);
+int snd_hdac_ext_bus_device_init(struct hdac_ext_bus *sbus, int addr);
+void snd_hdac_ext_bus_device_exit(struct hdac_device *hdev);
+
+#define ebus_to_hbus(ebus) (&(ebus)->bus)
+#define hbus_to_ebus(_bus) \
+ container_of(_bus, struct hdac_ext_bus, bus)
+
+int snd_hdac_ext_bus_parse_capabilities(struct hdac_ext_bus *sbus);
+void snd_hdac_ext_bus_ppcap_enable(struct hdac_ext_bus *chip, bool enable);
+void snd_hdac_ext_bus_ppcap_int_enable(struct hdac_ext_bus *chip, bool enable);
+
+#endif /* __SOUND_HDAUDIO_EXT_H */
@@ -10,3 +10,7 @@ config SND_HDA_I915
default y
depends on DRM_I915
depends on SND_HDA_CORE
+
+config SND_HDA_EXT_CORE
+ tristate
+ select SND_HDA_CORE
@@ -8,3 +8,6 @@ CFLAGS_trace.o := -I$(src)
snd-hda-core-$(CONFIG_SND_HDA_I915) += hdac_i915.o
obj-$(CONFIG_SND_HDA_CORE) += snd-hda-core.o
+
+#extended hda
+obj-$(CONFIG_SND_HDA_EXT_CORE) += ext/
new file mode 100644
@@ -0,0 +1,3 @@
+snd-hda-ext-core-objs := hdac_ext_bus.o
+
+obj-$(CONFIG_SND_HDA_EXT_CORE) += snd-hda-ext-core.o
new file mode 100644
@@ -0,0 +1,117 @@
+/*
+ * hdac-ext-bus.c - HD-audio extended core bus functions.
+ *
+ * Copyright (C) 2014-2015 Intel Corp
+ * Author: Jeeja KP <jeeja.kp@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; version 2 of the License.
+ *
+ * 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/module.h>
+#include <linux/slab.h>
+#include <sound/hdaudio_ext.h>
+
+MODULE_DESCRIPTION("HDA extended core");
+MODULE_LICENSE("GPL v2");
+
+/**
+ * snd_hdac_ext_bus_init - initialize a HD-audio extended bus
+ * @ebus: the pointer to extended bus object
+ * @dev: device pointer
+ * @ops: bus verb operators
+ * @io_ops: lowlevel I/O operators
+ *
+ * Returns 0 if successful, or a negative error code.
+ */
+int snd_hdac_ext_bus_init(struct hdac_ext_bus *ebus, struct device *dev,
+ const struct hdac_bus_ops *ops,
+ const struct hdac_io_ops *io_ops)
+{
+ int ret;
+ static int idx;
+
+ ret = snd_hdac_bus_init(&ebus->bus, dev, ops, io_ops);
+ if (ret < 0)
+ return ret;
+
+ INIT_LIST_HEAD(&ebus->hlink_list);
+ ebus->idx = idx++;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_init);
+
+/**
+ * snd_hdac_ext_bus_exit - clean up a HD-audio extended bus
+ * @ebus: the pointer to extended bus object
+ */
+void snd_hdac_ext_bus_exit(struct hdac_ext_bus *ebus)
+{
+ snd_hdac_bus_exit(&ebus->bus);
+ WARN_ON(!list_empty(&ebus->hlink_list));
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_exit);
+
+static void default_release(struct device *dev)
+{
+ snd_hdac_ext_bus_device_exit(container_of(dev, struct hdac_device, dev));
+}
+
+/**
+ * snd_hdac_ext_device_init - initialize the HDA extended codec base device
+ * @ebus: hdac extended bus to attach to
+ * @addr: codec address
+ *
+ * Returns zero for success or a negative error code.
+ */
+int snd_hdac_ext_bus_device_init(struct hdac_ext_bus *ebus, int addr)
+{
+ struct hdac_device *hdev = NULL;
+ struct hdac_bus *bus = ebus_to_hbus(ebus);
+ char name[15];
+ int ret;
+
+ hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
+ if (!hdev)
+ return -ENOMEM;
+
+ snprintf(name, sizeof(name), "ehdaudio%dD%d", ebus->idx, addr);
+
+ ret = snd_hdac_device_init(hdev, bus, name, addr);
+ if (ret < 0) {
+ dev_err(bus->dev, "device init failed for hdac device\n");
+ return ret;
+ }
+ hdev->type = HDA_DEV_ASOC;
+ hdev->dev.release = default_release;
+
+ ret = snd_hdac_device_register(hdev);
+ if (ret) {
+ dev_err(bus->dev, "failed to register hdac device\n");
+ snd_hdac_ext_bus_device_exit(hdev);
+ return ret;
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_init);
+
+/**
+ * snd_hdac_ext_bus_device_exit - clean up a HD-audio extended codec base device
+ * @hdev: hdac device to clean up
+ */
+void snd_hdac_ext_bus_device_exit(struct hdac_device *hdev)
+{
+ snd_hdac_device_exit(hdev);
+ kfree(hdev);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_exit);