staging: greybus: move core include files to include/linux/greybus/

With the goal of moving the core of the greybus code out of staging, the
include files need to be moved to include/linux/greybus.h and
include/linux/greybus/

Cc: Vaibhav Hiremath <hvaibhav.linux@gmail.com>
Cc: Johan Hovold <johan@kernel.org>
Cc: Vaibhav Agarwal <vaibhav.sr@gmail.com>
Cc: Rui Miguel Silva <rmfrfs@gmail.com>
Cc: David Lin <dtwlin@gmail.com>
Cc: "Bryan O'Donoghue" <pure.logic@nexus-software.ie>
Cc: greybus-dev@lists.linaro.org
Cc: devel@driverdev.osuosl.org
Acked-by: Mark Greer <mgreer@animalcreek.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Alex Elder <elder@kernel.org>
Link: https://lore.kernel.org/r/20190825055429.18547-8-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

12 files changed, 3192 insertions, 0 deletions

diff --git a/include/linux/greybus/bundle.h b/include/linux/greybus/bundle.h
new file mode 100644
index 000000000000..8734d2055657
--- /dev/null
+++ b/include/linux/greybus/bundle.h
@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Greybus bundles
+ *
+ * Copyright 2014 Google Inc.
+ * Copyright 2014 Linaro Ltd.
+ */
+
+#ifndef __BUNDLE_H
+#define __BUNDLE_H
+
+#include <linux/list.h>
+
+#define	BUNDLE_ID_NONE	U8_MAX
+
+/* Greybus "public" definitions" */
+struct gb_bundle {
+	struct device		dev;
+	struct gb_interface	*intf;
+
+	u8			id;
+	u8			class;
+	u8			class_major;
+	u8			class_minor;
+
+	size_t			num_cports;
+	struct greybus_descriptor_cport *cport_desc;
+
+	struct list_head	connections;
+	u8			*state;
+
+	struct list_head	links;	/* interface->bundles */
+};
+#define to_gb_bundle(d) container_of(d, struct gb_bundle, dev)
+
+/* Greybus "private" definitions" */
+struct gb_bundle *gb_bundle_create(struct gb_interface *intf, u8 bundle_id,
+				   u8 class);
+int gb_bundle_add(struct gb_bundle *bundle);
+void gb_bundle_destroy(struct gb_bundle *bundle);
+
+/* Bundle Runtime PM wrappers */
+#ifdef CONFIG_PM
+static inline int gb_pm_runtime_get_sync(struct gb_bundle *bundle)
+{
+	int retval;
+
+	retval = pm_runtime_get_sync(&bundle->dev);
+	if (retval < 0) {
+		dev_err(&bundle->dev,
+			"pm_runtime_get_sync failed: %d\n", retval);
+		pm_runtime_put_noidle(&bundle->dev);
+		return retval;
+	}
+
+	return 0;
+}
+
+static inline int gb_pm_runtime_put_autosuspend(struct gb_bundle *bundle)
+{
+	int retval;
+
+	pm_runtime_mark_last_busy(&bundle->dev);
+	retval = pm_runtime_put_autosuspend(&bundle->dev);
+
+	return retval;
+}
+
+static inline void gb_pm_runtime_get_noresume(struct gb_bundle *bundle)
+{
+	pm_runtime_get_noresume(&bundle->dev);
+}
+
+static inline void gb_pm_runtime_put_noidle(struct gb_bundle *bundle)
+{
+	pm_runtime_put_noidle(&bundle->dev);
+}
+
+#else
+static inline int gb_pm_runtime_get_sync(struct gb_bundle *bundle)
+{ return 0; }
+static inline int gb_pm_runtime_put_autosuspend(struct gb_bundle *bundle)
+{ return 0; }
+
+static inline void gb_pm_runtime_get_noresume(struct gb_bundle *bundle) {}
+static inline void gb_pm_runtime_put_noidle(struct gb_bundle *bundle) {}
+#endif
+
+#endif /* __BUNDLE_H */
diff --git a/include/linux/greybus/connection.h b/include/linux/greybus/connection.h
new file mode 100644
index 000000000000..5ca3befc0636
--- /dev/null
+++ b/include/linux/greybus/connection.h
@@ -0,0 +1,128 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Greybus connections
+ *
+ * Copyright 2014 Google Inc.
+ * Copyright 2014 Linaro Ltd.
+ */
+
+#ifndef __CONNECTION_H
+#define __CONNECTION_H
+
+#include <linux/list.h>
+#include <linux/kfifo.h>
+
+#define GB_CONNECTION_FLAG_CSD		BIT(0)
+#define GB_CONNECTION_FLAG_NO_FLOWCTRL	BIT(1)
+#define GB_CONNECTION_FLAG_OFFLOADED	BIT(2)
+#define GB_CONNECTION_FLAG_CDSI1	BIT(3)
+#define GB_CONNECTION_FLAG_CONTROL	BIT(4)
+#define GB_CONNECTION_FLAG_HIGH_PRIO	BIT(5)
+
+#define GB_CONNECTION_FLAG_CORE_MASK	GB_CONNECTION_FLAG_CONTROL
+
+enum gb_connection_state {
+	GB_CONNECTION_STATE_DISABLED		= 0,
+	GB_CONNECTION_STATE_ENABLED_TX		= 1,
+	GB_CONNECTION_STATE_ENABLED		= 2,
+	GB_CONNECTION_STATE_DISCONNECTING	= 3,
+};
+
+struct gb_operation;
+
+typedef int (*gb_request_handler_t)(struct gb_operation *);
+
+struct gb_connection {
+	struct gb_host_device		*hd;
+	struct gb_interface		*intf;
+	struct gb_bundle		*bundle;
+	struct kref			kref;
+	u16				hd_cport_id;
+	u16				intf_cport_id;
+
+	struct list_head		hd_links;
+	struct list_head		bundle_links;
+
+	gb_request_handler_t		handler;
+	unsigned long			flags;
+
+	struct mutex			mutex;
+	spinlock_t			lock;
+	enum gb_connection_state	state;
+	struct list_head		operations;
+
+	char				name[16];
+	struct workqueue_struct		*wq;
+
+	atomic_t			op_cycle;
+
+	void				*private;
+
+	bool				mode_switch;
+};
+
+struct gb_connection *gb_connection_create_static(struct gb_host_device *hd,
+				u16 hd_cport_id, gb_request_handler_t handler);
+struct gb_connection *gb_connection_create_control(struct gb_interface *intf);
+struct gb_connection *gb_connection_create(struct gb_bundle *bundle,
+				u16 cport_id, gb_request_handler_t handler);
+struct gb_connection *gb_connection_create_flags(struct gb_bundle *bundle,
+				u16 cport_id, gb_request_handler_t handler,
+				unsigned long flags);
+struct gb_connection *gb_connection_create_offloaded(struct gb_bundle *bundle,
+				u16 cport_id, unsigned long flags);
+void gb_connection_destroy(struct gb_connection *connection);
+
+static inline bool gb_connection_is_static(struct gb_connection *connection)
+{
+	return !connection->intf;
+}
+
+int gb_connection_enable(struct gb_connection *connection);
+int gb_connection_enable_tx(struct gb_connection *connection);
+void gb_connection_disable_rx(struct gb_connection *connection);
+void gb_connection_disable(struct gb_connection *connection);
+void gb_connection_disable_forced(struct gb_connection *connection);
+
+void gb_connection_mode_switch_prepare(struct gb_connection *connection);
+void gb_connection_mode_switch_complete(struct gb_connection *connection);
+
+void greybus_data_rcvd(struct gb_host_device *hd, u16 cport_id,
+		       u8 *data, size_t length);
+
+void gb_connection_latency_tag_enable(struct gb_connection *connection);
+void gb_connection_latency_tag_disable(struct gb_connection *connection);
+
+static inline bool gb_connection_e2efc_enabled(struct gb_connection *connection)
+{
+	return !(connection->flags & GB_CONNECTION_FLAG_CSD);
+}
+
+static inline bool
+gb_connection_flow_control_disabled(struct gb_connection *connection)
+{
+	return connection->flags & GB_CONNECTION_FLAG_NO_FLOWCTRL;
+}
+
+static inline bool gb_connection_is_offloaded(struct gb_connection *connection)
+{
+	return connection->flags & GB_CONNECTION_FLAG_OFFLOADED;
+}
+
+static inline bool gb_connection_is_control(struct gb_connection *connection)
+{
+	return connection->flags & GB_CONNECTION_FLAG_CONTROL;
+}
+
+static inline void *gb_connection_get_data(struct gb_connection *connection)
+{
+	return connection->private;
+}
+
+static inline void gb_connection_set_data(struct gb_connection *connection,
+					  void *data)
+{
+	connection->private = data;
+}
+
+#endif /* __CONNECTION_H */
diff --git a/include/linux/greybus/control.h b/include/linux/greybus/control.h
new file mode 100644
index 000000000000..3a29ec05f631
--- /dev/null
+++ b/include/linux/greybus/control.h
@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Greybus CPort control protocol
+ *
+ * Copyright 2015 Google Inc.
+ * Copyright 2015 Linaro Ltd.
+ */
+
+#ifndef __CONTROL_H
+#define __CONTROL_H
+
+struct gb_control {
+	struct device dev;
+	struct gb_interface *intf;
+
+	struct gb_connection *connection;
+
+	u8 protocol_major;
+	u8 protocol_minor;
+
+	bool has_bundle_activate;
+	bool has_bundle_version;
+
+	char *vendor_string;
+	char *product_string;
+};
+#define to_gb_control(d) container_of(d, struct gb_control, dev)
+
+struct gb_control *gb_control_create(struct gb_interface *intf);
+int gb_control_enable(struct gb_control *control);
+void gb_control_disable(struct gb_control *control);
+int gb_control_suspend(struct gb_control *control);
+int gb_control_resume(struct gb_control *control);
+int gb_control_add(struct gb_control *control);
+void gb_control_del(struct gb_control *control);
+struct gb_control *gb_control_get(struct gb_control *control);
+void gb_control_put(struct gb_control *control);
+
+int gb_control_get_bundle_versions(struct gb_control *control);
+int gb_control_connected_operation(struct gb_control *control, u16 cport_id);
+int gb_control_disconnected_operation(struct gb_control *control, u16 cport_id);
+int gb_control_disconnecting_operation(struct gb_control *control,
+				       u16 cport_id);
+int gb_control_mode_switch_operation(struct gb_control *control);
+void gb_control_mode_switch_prepare(struct gb_control *control);
+void gb_control_mode_switch_complete(struct gb_control *control);
+int gb_control_get_manifest_size_operation(struct gb_interface *intf);
+int gb_control_get_manifest_operation(struct gb_interface *intf, void *manifest,
+				      size_t size);
+int gb_control_bundle_suspend(struct gb_control *control, u8 bundle_id);
+int gb_control_bundle_resume(struct gb_control *control, u8 bundle_id);
+int gb_control_bundle_deactivate(struct gb_control *control, u8 bundle_id);
+int gb_control_bundle_activate(struct gb_control *control, u8 bundle_id);
+int gb_control_interface_suspend_prepare(struct gb_control *control);
+int gb_control_interface_deactivate_prepare(struct gb_control *control);
+int gb_control_interface_hibernate_abort(struct gb_control *control);
+#endif /* __CONTROL_H */
diff --git a/include/linux/greybus/greybus_id.h b/include/linux/greybus/greybus_id.h
new file mode 100644
index 000000000000..f4c8440093e4
--- /dev/null
+++ b/include/linux/greybus/greybus_id.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* FIXME
+ * move this to include/linux/mod_devicetable.h when merging
+ */
+
+#ifndef __LINUX_GREYBUS_ID_H
+#define __LINUX_GREYBUS_ID_H
+
+#include <linux/types.h>
+#include <linux/mod_devicetable.h>
+
+
+struct greybus_bundle_id {
+	__u16	match_flags;
+	__u32	vendor;
+	__u32	product;
+	__u8	class;
+
+	kernel_ulong_t	driver_info __aligned(sizeof(kernel_ulong_t));
+};
+
+/* Used to match the greybus_bundle_id */
+#define GREYBUS_ID_MATCH_VENDOR		BIT(0)
+#define GREYBUS_ID_MATCH_PRODUCT	BIT(1)
+#define GREYBUS_ID_MATCH_CLASS		BIT(2)
+
+#endif /* __LINUX_GREYBUS_ID_H */
diff --git a/include/linux/greybus/greybus_manifest.h b/include/linux/greybus/greybus_manifest.h
new file mode 100644
index 000000000000..db68f7e7d5a7
--- /dev/null
+++ b/include/linux/greybus/greybus_manifest.h
@@ -0,0 +1,178 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Greybus manifest definition
+ *
+ * See "Greybus Application Protocol" document (version 0.1) for
+ * details on these values and structures.
+ *
+ * Copyright 2014-2015 Google Inc.
+ * Copyright 2014-2015 Linaro Ltd.
+ *
+ * Released under the GPLv2 and BSD licenses.
+ */
+
+#ifndef __GREYBUS_MANIFEST_H
+#define __GREYBUS_MANIFEST_H
+
+enum greybus_descriptor_type {
+	GREYBUS_TYPE_INVALID		= 0x00,
+	GREYBUS_TYPE_INTERFACE		= 0x01,
+	GREYBUS_TYPE_STRING		= 0x02,
+	GREYBUS_TYPE_BUNDLE		= 0x03,
+	GREYBUS_TYPE_CPORT		= 0x04,
+};
+
+enum greybus_protocol {
+	GREYBUS_PROTOCOL_CONTROL	= 0x00,
+	/* 0x01 is unused */
+	GREYBUS_PROTOCOL_GPIO		= 0x02,
+	GREYBUS_PROTOCOL_I2C		= 0x03,
+	GREYBUS_PROTOCOL_UART		= 0x04,
+	GREYBUS_PROTOCOL_HID		= 0x05,
+	GREYBUS_PROTOCOL_USB		= 0x06,
+	GREYBUS_PROTOCOL_SDIO		= 0x07,
+	GREYBUS_PROTOCOL_POWER_SUPPLY	= 0x08,
+	GREYBUS_PROTOCOL_PWM		= 0x09,
+	/* 0x0a is unused */
+	GREYBUS_PROTOCOL_SPI		= 0x0b,
+	GREYBUS_PROTOCOL_DISPLAY	= 0x0c,
+	GREYBUS_PROTOCOL_CAMERA_MGMT	= 0x0d,
+	GREYBUS_PROTOCOL_SENSOR		= 0x0e,
+	GREYBUS_PROTOCOL_LIGHTS		= 0x0f,
+	GREYBUS_PROTOCOL_VIBRATOR	= 0x10,
+	GREYBUS_PROTOCOL_LOOPBACK	= 0x11,
+	GREYBUS_PROTOCOL_AUDIO_MGMT	= 0x12,
+	GREYBUS_PROTOCOL_AUDIO_DATA	= 0x13,
+	GREYBUS_PROTOCOL_SVC            = 0x14,
+	GREYBUS_PROTOCOL_BOOTROM	= 0x15,
+	GREYBUS_PROTOCOL_CAMERA_DATA	= 0x16,
+	GREYBUS_PROTOCOL_FW_DOWNLOAD	= 0x17,
+	GREYBUS_PROTOCOL_FW_MANAGEMENT	= 0x18,
+	GREYBUS_PROTOCOL_AUTHENTICATION	= 0x19,
+	GREYBUS_PROTOCOL_LOG		= 0x1a,
+		/* ... */
+	GREYBUS_PROTOCOL_RAW		= 0xfe,
+	GREYBUS_PROTOCOL_VENDOR		= 0xff,
+};
+
+enum greybus_class_type {
+	GREYBUS_CLASS_CONTROL		= 0x00,
+	/* 0x01 is unused */
+	/* 0x02 is unused */
+	/* 0x03 is unused */
+	/* 0x04 is unused */
+	GREYBUS_CLASS_HID		= 0x05,
+	/* 0x06 is unused */
+	/* 0x07 is unused */
+	GREYBUS_CLASS_POWER_SUPPLY	= 0x08,
+	/* 0x09 is unused */
+	GREYBUS_CLASS_BRIDGED_PHY	= 0x0a,
+	/* 0x0b is unused */
+	GREYBUS_CLASS_DISPLAY		= 0x0c,
+	GREYBUS_CLASS_CAMERA		= 0x0d,
+	GREYBUS_CLASS_SENSOR		= 0x0e,
+	GREYBUS_CLASS_LIGHTS		= 0x0f,
+	GREYBUS_CLASS_VIBRATOR		= 0x10,
+	GREYBUS_CLASS_LOOPBACK		= 0x11,
+	GREYBUS_CLASS_AUDIO		= 0x12,
+	/* 0x13 is unused */
+	/* 0x14 is unused */
+	GREYBUS_CLASS_BOOTROM		= 0x15,
+	GREYBUS_CLASS_FW_MANAGEMENT	= 0x16,
+	GREYBUS_CLASS_LOG		= 0x17,
+		/* ... */
+	GREYBUS_CLASS_RAW		= 0xfe,
+	GREYBUS_CLASS_VENDOR		= 0xff,
+};
+
+enum {
+	GREYBUS_INTERFACE_FEATURE_TIMESYNC = BIT(0),
+};
+
+/*
+ * The string in a string descriptor is not NUL-terminated.  The
+ * size of the descriptor will be rounded up to a multiple of 4
+ * bytes, by padding the string with 0x00 bytes if necessary.
+ */
+struct greybus_descriptor_string {
+	__u8	length;
+	__u8	id;
+	__u8	string[0];
+} __packed;
+
+/*
+ * An interface descriptor describes information about an interface as a whole,
+ * *not* the functions within it.
+ */
+struct greybus_descriptor_interface {
+	__u8	vendor_stringid;
+	__u8	product_stringid;
+	__u8	features;
+	__u8	pad;
+} __packed;
+
+/*
+ * An bundle descriptor defines an identification number and a class for
+ * each bundle.
+ *
+ * @id: Uniquely identifies a bundle within a interface, its sole purpose is to
+ * allow CPort descriptors to specify which bundle they are associated with.
+ * The first bundle will have id 0, second will have 1 and so on.
+ *
+ * The largest CPort id associated with an bundle (defined by a
+ * CPort descriptor in the manifest) is used to determine how to
+ * encode the device id and module number in UniPro packets
+ * that use the bundle.
+ *
+ * @class: It is used by kernel to know the functionality provided by the
+ * bundle and will be matched against drivers functinality while probing greybus
+ * driver. It should contain one of the values defined in
+ * 'enum greybus_class_type'.
+ *
+ */
+struct greybus_descriptor_bundle {
+	__u8	id;	/* interface-relative id (0..) */
+	__u8	class;
+	__u8	pad[2];
+} __packed;
+
+/*
+ * A CPort descriptor indicates the id of the bundle within the
+ * module it's associated with, along with the CPort id used to
+ * address the CPort.  The protocol id defines the format of messages
+ * exchanged using the CPort.
+ */
+struct greybus_descriptor_cport {
+	__le16	id;
+	__u8	bundle;
+	__u8	protocol_id;	/* enum greybus_protocol */
+} __packed;
+
+struct greybus_descriptor_header {
+	__le16	size;
+	__u8	type;		/* enum greybus_descriptor_type */
+	__u8	pad;
+} __packed;
+
+struct greybus_descriptor {
+	struct greybus_descriptor_header		header;
+	union {
+		struct greybus_descriptor_string	string;
+		struct greybus_descriptor_interface	interface;
+		struct greybus_descriptor_bundle	bundle;
+		struct greybus_descriptor_cport		cport;
+	};
+} __packed;
+
+struct greybus_manifest_header {
+	__le16	size;
+	__u8	version_major;
+	__u8	version_minor;
+} __packed;
+
+struct greybus_manifest {
+	struct greybus_manifest_header		header;
+	struct greybus_descriptor		descriptors[0];
+} __packed;
+
+#endif /* __GREYBUS_MANIFEST_H */
diff --git a/include/linux/greybus/greybus_protocols.h b/include/linux/greybus/greybus_protocols.h
new file mode 100644
index 000000000000..5f34d1effb59
--- /dev/null
+++ b/include/linux/greybus/greybus_protocols.h
@@ -0,0 +1,2176 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
+/*
+ * Copyright(c) 2014 - 2015 Google Inc. All rights reserved.
+ * Copyright(c) 2014 - 2015 Linaro Ltd. All rights reserved.
+ */
+
+#ifndef __GREYBUS_PROTOCOLS_H
+#define __GREYBUS_PROTOCOLS_H
+
+/* Fixed IDs for control/svc protocols */
+
+/* SVC switch-port device ids */
+#define GB_SVC_DEVICE_ID_SVC			0
+#define GB_SVC_DEVICE_ID_AP			1
+#define GB_SVC_DEVICE_ID_MIN			2
+#define GB_SVC_DEVICE_ID_MAX			31
+
+#define GB_SVC_CPORT_ID				0
+#define GB_CONTROL_BUNDLE_ID			0
+#define GB_CONTROL_CPORT_ID			0
+
+
+/*
+ * All operation messages (both requests and responses) begin with
+ * a header that encodes the size of the message (header included).
+ * This header also contains a unique identifier, that associates a
+ * response message with its operation.  The header contains an
+ * operation type field, whose interpretation is dependent on what
+ * type of protocol is used over the connection.  The high bit
+ * (0x80) of the operation type field is used to indicate whether
+ * the message is a request (clear) or a response (set).
+ *
+ * Response messages include an additional result byte, which
+ * communicates the result of the corresponding request.  A zero
+ * result value means the operation completed successfully.  Any
+ * other value indicates an error; in this case, the payload of the
+ * response message (if any) is ignored.  The result byte must be
+ * zero in the header for a request message.
+ *
+ * The wire format for all numeric fields in the header is little
+ * endian.  Any operation-specific data begins immediately after the
+ * header.
+ */
+struct gb_operation_msg_hdr {
+	__le16	size;		/* Size in bytes of header + payload */
+	__le16	operation_id;	/* Operation unique id */
+	__u8	type;		/* E.g GB_I2C_TYPE_* or GB_GPIO_TYPE_* */
+	__u8	result;		/* Result of request (in responses only) */
+	__u8	pad[2];		/* must be zero (ignore when read) */
+} __packed;
+
+
+/* Generic request types */
+#define GB_REQUEST_TYPE_CPORT_SHUTDOWN		0x00
+#define GB_REQUEST_TYPE_INVALID			0x7f
+
+struct gb_cport_shutdown_request {
+	__u8 phase;
+} __packed;
+
+
+/* Control Protocol */
+
+/* Greybus control request types */
+#define GB_CONTROL_TYPE_VERSION			0x01
+#define GB_CONTROL_TYPE_PROBE_AP		0x02
+#define GB_CONTROL_TYPE_GET_MANIFEST_SIZE	0x03
+#define GB_CONTROL_TYPE_GET_MANIFEST		0x04
+#define GB_CONTROL_TYPE_CONNECTED		0x05
+#define GB_CONTROL_TYPE_DISCONNECTED		0x06
+#define GB_CONTROL_TYPE_TIMESYNC_ENABLE		0x07
+#define GB_CONTROL_TYPE_TIMESYNC_DISABLE	0x08
+#define GB_CONTROL_TYPE_TIMESYNC_AUTHORITATIVE	0x09
+/*	Unused					0x0a */
+#define GB_CONTROL_TYPE_BUNDLE_VERSION		0x0b
+#define GB_CONTROL_TYPE_DISCONNECTING		0x0c
+#define GB_CONTROL_TYPE_TIMESYNC_GET_LAST_EVENT	0x0d
+#define GB_CONTROL_TYPE_MODE_SWITCH		0x0e
+#define GB_CONTROL_TYPE_BUNDLE_SUSPEND		0x0f
+#define GB_CONTROL_TYPE_BUNDLE_RESUME		0x10
+#define GB_CONTROL_TYPE_BUNDLE_DEACTIVATE	0x11
+#define GB_CONTROL_TYPE_BUNDLE_ACTIVATE		0x12
+#define GB_CONTROL_TYPE_INTF_SUSPEND_PREPARE		0x13
+#define GB_CONTROL_TYPE_INTF_DEACTIVATE_PREPARE	0x14
+#define GB_CONTROL_TYPE_INTF_HIBERNATE_ABORT	0x15
+
+struct gb_control_version_request {
+	__u8	major;
+	__u8	minor;
+} __packed;
+
+struct gb_control_version_response {
+	__u8	major;
+	__u8	minor;
+} __packed;
+
+struct gb_control_bundle_version_request {
+	__u8	bundle_id;
+} __packed;
+
+struct gb_control_bundle_version_response {
+	__u8	major;
+	__u8	minor;
+} __packed;
+
+/* Control protocol manifest get size request has no payload*/
+struct gb_control_get_manifest_size_response {
+	__le16			size;
+} __packed;
+
+/* Control protocol manifest get request has no payload */
+struct gb_control_get_manifest_response {
+	__u8			data[0];
+} __packed;
+
+/* Control protocol [dis]connected request */
+struct gb_control_connected_request {
+	__le16			cport_id;
+} __packed;
+
+struct gb_control_disconnecting_request {
+	__le16			cport_id;
+} __packed;
+/* disconnecting response has no payload */
+
+struct gb_control_disconnected_request {
+	__le16			cport_id;
+} __packed;
+/* Control protocol [dis]connected response has no payload */
+
+/*
+ * All Bundle power management operations use the same request and response
+ * layout and status codes.
+ */
+
+#define GB_CONTROL_BUNDLE_PM_OK		0x00
+#define GB_CONTROL_BUNDLE_PM_INVAL	0x01
+#define GB_CONTROL_BUNDLE_PM_BUSY	0x02
+#define GB_CONTROL_BUNDLE_PM_FAIL	0x03
+#define GB_CONTROL_BUNDLE_PM_NA		0x04
+
+struct gb_control_bundle_pm_request {
+	__u8	bundle_id;
+} __packed;
+
+struct gb_control_bundle_pm_response {
+	__u8	status;
+} __packed;
+
+/*
+ * Interface Suspend Prepare and Deactivate Prepare operations use the same
+ * response layout and error codes. Define a single response structure and reuse
+ * it. Both operations have no payload.
+ */
+
+#define GB_CONTROL_INTF_PM_OK		0x00
+#define GB_CONTROL_INTF_PM_BUSY		0x01
+#define GB_CONTROL_INTF_PM_NA		0x02
+
+struct gb_control_intf_pm_response {
+	__u8	status;
+} __packed;
+
+/* APBridge protocol */
+
+/* request APB1 log */
+#define GB_APB_REQUEST_LOG			0x02
+
+/* request to map a cport to bulk in and bulk out endpoints */
+#define GB_APB_REQUEST_EP_MAPPING		0x03
+
+/* request to get the number of cports available */
+#define GB_APB_REQUEST_CPORT_COUNT		0x04
+
+/* request to reset a cport state */
+#define GB_APB_REQUEST_RESET_CPORT		0x05
+
+/* request to time the latency of messages on a given cport */
+#define GB_APB_REQUEST_LATENCY_TAG_EN		0x06
+#define GB_APB_REQUEST_LATENCY_TAG_DIS		0x07
+
+/* request to control the CSI transmitter */
+#define GB_APB_REQUEST_CSI_TX_CONTROL		0x08
+
+/* request to control audio streaming */
+#define GB_APB_REQUEST_AUDIO_CONTROL		0x09
+
+/* TimeSync requests */
+#define GB_APB_REQUEST_TIMESYNC_ENABLE		0x0d
+#define GB_APB_REQUEST_TIMESYNC_DISABLE		0x0e
+#define GB_APB_REQUEST_TIMESYNC_AUTHORITATIVE	0x0f
+#define GB_APB_REQUEST_TIMESYNC_GET_LAST_EVENT	0x10
+
+/* requests to set Greybus CPort flags */
+#define GB_APB_REQUEST_CPORT_FLAGS		0x11
+
+/* ARPC request */
+#define GB_APB_REQUEST_ARPC_RUN			0x12
+
+struct gb_apb_request_cport_flags {
+	__le32	flags;
+#define GB_APB_CPORT_FLAG_CONTROL		0x01
+#define GB_APB_CPORT_FLAG_HIGH_PRIO		0x02
+} __packed;
+
+
+/* Firmware Download Protocol */
+
+/* Request Types */
+#define GB_FW_DOWNLOAD_TYPE_FIND_FIRMWARE	0x01
+#define GB_FW_DOWNLOAD_TYPE_FETCH_FIRMWARE	0x02
+#define GB_FW_DOWNLOAD_TYPE_RELEASE_FIRMWARE	0x03
+
+#define GB_FIRMWARE_TAG_MAX_SIZE		10
+
+/* firmware download find firmware request/response */
+struct gb_fw_download_find_firmware_request {
+	__u8			firmware_tag[GB_FIRMWARE_TAG_MAX_SIZE];
+} __packed;
+
+struct gb_fw_download_find_firmware_response {
+	__u8			firmware_id;
+	__le32			size;
+} __packed;
+
+/* firmware download fetch firmware request/response */
+struct gb_fw_download_fetch_firmware_request {
+	__u8			firmware_id;
+	__le32			offset;
+	__le32			size;
+} __packed;
+
+struct gb_fw_download_fetch_firmware_response {
+	__u8			data[0];
+} __packed;
+
+/* firmware download release firmware request */
+struct gb_fw_download_release_firmware_request {
+	__u8			firmware_id;
+} __packed;
+/* firmware download release firmware response has no payload */
+
+
+/* Firmware Management Protocol */
+
+/* Request Types */
+#define GB_FW_MGMT_TYPE_INTERFACE_FW_VERSION	0x01
+#define GB_FW_MGMT_TYPE_LOAD_AND_VALIDATE_FW	0x02
+#define GB_FW_MGMT_TYPE_LOADED_FW		0x03
+#define GB_FW_MGMT_TYPE_BACKEND_FW_VERSION	0x04
+#define GB_FW_MGMT_TYPE_BACKEND_FW_UPDATE	0x05
+#define GB_FW_MGMT_TYPE_BACKEND_FW_UPDATED	0x06
+
+#define GB_FW_LOAD_METHOD_UNIPRO		0x01
+#define GB_FW_LOAD_METHOD_INTERNAL		0x02
+
+#define GB_FW_LOAD_STATUS_FAILED		0x00
+#define GB_FW_LOAD_STATUS_UNVALIDATED		0x01
+#define GB_FW_LOAD_STATUS_VALIDATED		0x02
+#define GB_FW_LOAD_STATUS_VALIDATION_FAILED	0x03
+
+#define GB_FW_BACKEND_FW_STATUS_SUCCESS		0x01
+#define GB_FW_BACKEND_FW_STATUS_FAIL_FIND	0x02
+#define GB_FW_BACKEND_FW_STATUS_FAIL_FETCH	0x03
+#define GB_FW_BACKEND_FW_STATUS_FAIL_WRITE	0x04
+#define GB_FW_BACKEND_FW_STATUS_INT		0x05
+#define GB_FW_BACKEND_FW_STATUS_RETRY		0x06
+#define GB_FW_BACKEND_FW_STATUS_NOT_SUPPORTED	0x07
+
+#define GB_FW_BACKEND_VERSION_STATUS_SUCCESS		0x01
+#define GB_FW_BACKEND_VERSION_STATUS_NOT_AVAILABLE	0x02
+#define GB_FW_BACKEND_VERSION_STATUS_NOT_SUPPORTED	0x03
+#define GB_FW_BACKEND_VERSION_STATUS_RETRY		0x04
+#define GB_FW_BACKEND_VERSION_STATUS_FAIL_INT		0x05
+
+/* firmware management interface firmware version request has no payload */
+struct gb_fw_mgmt_interface_fw_version_response {
+	__u8			firmware_tag[GB_FIRMWARE_TAG_MAX_SIZE];
+	__le16			major;
+	__le16			minor;
+} __packed;
+
+/* firmware management load and validate firmware request/response */
+struct gb_fw_mgmt_load_and_validate_fw_request {
+	__u8			request_id;
+	__u8			load_method;
+	__u8			firmware_tag[GB_FIRMWARE_TAG_MAX_SIZE];
+} __packed;
+/* firmware management load and validate firmware response has no payload*/
+
+/* firmware management loaded firmware request */
+struct gb_fw_mgmt_loaded_fw_request {
+	__u8			request_id;
+	__u8			status;
+	__le16			major;
+	__le16			minor;
+} __packed;
+/* firmware management loaded firmware response has no payload */
+
+/* firmware management backend firmware version request/response */
+struct gb_fw_mgmt_backend_fw_version_request {
+	__u8			firmware_tag[GB_FIRMWARE_TAG_MAX_SIZE];
+} __packed;
+
+struct gb_fw_mgmt_backend_fw_version_response {
+	__le16			major;
+	__le16			minor;
+	__u8			status;
+} __packed;
+
+/* firmware management backend firmware update request */
+struct gb_fw_mgmt_backend_fw_update_request {
+	__u8			request_id;
+	__u8			firmware_tag[GB_FIRMWARE_TAG_MAX_SIZE];
+} __packed;
+/* firmware management backend firmware update response has no payload */
+
+/* firmware management backend firmware updated request */
+struct gb_fw_mgmt_backend_fw_updated_request {
+	__u8			request_id;
+	__u8			status;
+} __packed;
+/* firmware management backend firmware updated response has no payload */
+
+
+/* Component Authentication Protocol (CAP) */
+
+/* Request Types */
+#define GB_CAP_TYPE_GET_ENDPOINT_UID	0x01
+#define GB_CAP_TYPE_GET_IMS_CERTIFICATE	0x02
+#define GB_CAP_TYPE_AUTHENTICATE	0x03
+
+/* CAP get endpoint uid request has no payload */
+struct gb_cap_get_endpoint_uid_response {
+	__u8			uid[8];
+} __packed;
+
+/* CAP get endpoint ims certificate request/response */
+struct gb_cap_get_ims_certificate_request {
+	__le32			certificate_class;
+	__le32			certificate_id;
+} __packed;
+
+struct gb_cap_get_ims_certificate_response {
+	__u8			result_code;
+	__u8			certificate[0];
+} __packed;
+
+/* CAP authenticate request/response */
+struct gb_cap_authenticate_request {
+	__le32			auth_type;
+	__u8			uid[8];
+	__u8			challenge[32];
+} __packed;
+
+struct gb_cap_authenticate_response {
+	__u8			result_code;
+	__u8			response[64];
+	__u8			signature[0];
+} __packed;
+
+
+/* Bootrom Protocol */
+
+/* Version of the Greybus bootrom protocol we support */
+#define GB_BOOTROM_VERSION_MAJOR		0x00
+#define GB_BOOTROM_VERSION_MINOR		0x01
+
+/* Greybus bootrom request types */
+#define GB_BOOTROM_TYPE_VERSION			0x01
+#define GB_BOOTROM_TYPE_FIRMWARE_SIZE		0x02
+#define GB_BOOTROM_TYPE_GET_FIRMWARE		0x03
+#define GB_BOOTROM_TYPE_READY_TO_BOOT		0x04
+#define GB_BOOTROM_TYPE_AP_READY		0x05	/* Request with no-payload */
+#define GB_BOOTROM_TYPE_GET_VID_PID		0x06	/* Request with no-payload */
+
+/* Greybus bootrom boot stages */
+#define GB_BOOTROM_BOOT_STAGE_ONE		0x01 /* Reserved for the boot ROM */
+#define GB_BOOTROM_BOOT_STAGE_TWO		0x02 /* Bootrom package to be loaded by the boot ROM */
+#define GB_BOOTROM_BOOT_STAGE_THREE		0x03 /* Module personality package loaded by Stage 2 firmware */
+
+/* Greybus bootrom ready to boot status */
+#define GB_BOOTROM_BOOT_STATUS_INVALID		0x00 /* Firmware blob could not be validated */
+#define GB_BOOTROM_BOOT_STATUS_INSECURE		0x01 /* Firmware blob is valid but insecure */
+#define GB_BOOTROM_BOOT_STATUS_SECURE		0x02 /* Firmware blob is valid and secure */
+
+/* Max bootrom data fetch size in bytes */
+#define GB_BOOTROM_FETCH_MAX			2000
+
+struct gb_bootrom_version_request {
+	__u8	major;
+	__u8	minor;
+} __packed;
+
+struct gb_bootrom_version_response {
+	__u8	major;
+	__u8	minor;
+} __packed;
+
+/* Bootrom protocol firmware size request/response */
+struct gb_bootrom_firmware_size_request {
+	__u8			stage;
+} __packed;
+
+struct gb_bootrom_firmware_size_response {
+	__le32			size;
+} __packed;
+
+/* Bootrom protocol get firmware request/response */
+struct gb_bootrom_get_firmware_request {
+	__le32			offset;
+	__le32			size;
+} __packed;
+
+struct gb_bootrom_get_firmware_response {
+	__u8			data[0];
+} __packed;
+
+/* Bootrom protocol Ready to boot request */
+struct gb_bootrom_ready_to_boot_request {
+	__u8			status;
+} __packed;
+/* Bootrom protocol Ready to boot response has no payload */
+
+/* Bootrom protocol get VID/PID request has no payload */
+struct gb_bootrom_get_vid_pid_response {
+	__le32			vendor_id;
+	__le32			product_id;
+} __packed;
+
+
+/* Power Supply */
+
+/* Greybus power supply request types */
+#define GB_POWER_SUPPLY_TYPE_GET_SUPPLIES		0x02
+#define GB_POWER_SUPPLY_TYPE_GET_DESCRIPTION		0x03
+#define GB_POWER_SUPPLY_TYPE_GET_PROP_DESCRIPTORS	0x04
+#define GB_POWER_SUPPLY_TYPE_GET_PROPERTY		0x05
+#define GB_POWER_SUPPLY_TYPE_SET_PROPERTY		0x06
+#define GB_POWER_SUPPLY_TYPE_EVENT			0x07
+
+/* Greybus power supply battery technologies types */
+#define GB_POWER_SUPPLY_TECH_UNKNOWN			0x0000
+#define GB_POWER_SUPPLY_TECH_NiMH			0x0001
+#define GB_POWER_SUPPLY_TECH_LION			0x0002
+#define GB_POWER_SUPPLY_TECH_LIPO			0x0003
+#define GB_POWER_SUPPLY_TECH_LiFe			0x0004
+#define GB_POWER_SUPPLY_TECH_NiCd			0x0005
+#define GB_POWER_SUPPLY_TECH_LiMn			0x0006
+
+/* Greybus power supply types */
+#define GB_POWER_SUPPLY_UNKNOWN_TYPE			0x0000
+#define GB_POWER_SUPPLY_BATTERY_TYPE			0x0001
+#define GB_POWER_SUPPLY_UPS_TYPE			0x0002
+#define GB_POWER_SUPPLY_MAINS_TYPE			0x0003
+#define GB_POWER_SUPPLY_USB_TYPE			0x0004
+#define GB_POWER_SUPPLY_USB_DCP_TYPE			0x0005
+#define GB_POWER_SUPPLY_USB_CDP_TYPE			0x0006
+#define GB_POWER_SUPPLY_USB_ACA_TYPE			0x0007
+
+/* Greybus power supply health values */
+#define GB_POWER_SUPPLY_HEALTH_UNKNOWN			0x0000
+#define GB_POWER_SUPPLY_HEALTH_GOOD			0x0001
+#define GB_POWER_SUPPLY_HEALTH_OVERHEAT			0x0002
+#define GB_POWER_SUPPLY_HEALTH_DEAD			0x0003
+#define GB_POWER_SUPPLY_HEALTH_OVERVOLTAGE		0x0004
+#define GB_POWER_SUPPLY_HEALTH_UNSPEC_FAILURE		0x0005
+#define GB_POWER_SUPPLY_HEALTH_COLD			0x0006
+#define GB_POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE	0x0007
+#define GB_POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE	0x0008
+
+/* Greybus power supply status values */
+#define GB_POWER_SUPPLY_STATUS_UNKNOWN			0x0000
+#define GB_POWER_SUPPLY_STATUS_CHARGING			0x0001
+#define GB_POWER_SUPPLY_STATUS_DISCHARGING		0x0002
+#define GB_POWER_SUPPLY_STATUS_NOT_CHARGING		0x0003
+#define GB_POWER_SUPPLY_STATUS_FULL			0x0004
+
+/* Greybus power supply capacity level values */
+#define GB_POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN		0x0000
+#define GB_POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL		0x0001
+#define GB_POWER_SUPPLY_CAPACITY_LEVEL_LOW		0x0002
+#define GB_POWER_SUPPLY_CAPACITY_LEVEL_NORMAL		0x0003
+#define GB_POWER_SUPPLY_CAPACITY_LEVEL_HIGH		0x0004
+#define GB_POWER_SUPPLY_CAPACITY_LEVEL_FULL		0x0005
+
+/* Greybus power supply scope values */
+#define GB_POWER_SUPPLY_SCOPE_UNKNOWN			0x0000
+#define GB_POWER_SUPPLY_SCOPE_SYSTEM			0x0001
+#define GB_POWER_SUPPLY_SCOPE_DEVICE			0x0002
+
+struct gb_power_supply_get_supplies_response {
+	__u8	supplies_count;
+} __packed;
+
+struct gb_power_supply_get_description_request {
+	__u8	psy_id;
+} __packed;
+
+struct gb_power_supply_get_description_response {
+	__u8	manufacturer[32];
+	__u8	model[32];
+	__u8	serial_number[32];
+	__le16	type;
+	__u8	properties_count;
+} __packed;
+
+struct gb_power_supply_props_desc {
+	__u8	property;
+#define GB_POWER_SUPPLY_PROP_STATUS				0x00
+#define GB_POWER_SUPPLY_PROP_CHARGE_TYPE			0x01
+#define GB_POWER_SUPPLY_PROP_HEALTH				0x02
+#define GB_POWER_SUPPLY_PROP_PRESENT				0x03
+#define GB_POWER_SUPPLY_PROP_ONLINE				0x04
+#define GB_POWER_SUPPLY_PROP_AUTHENTIC				0x05
+#define GB_POWER_SUPPLY_PROP_TECHNOLOGY				0x06
+#define GB_POWER_SUPPLY_PROP_CYCLE_COUNT			0x07
+#define GB_POWER_SUPPLY_PROP_VOLTAGE_MAX			0x08
+#define GB_POWER_SUPPLY_PROP_VOLTAGE_MIN			0x09
+#define GB_POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN			0x0A
+#define GB_POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN			0x0B
+#define GB_POWER_SUPPLY_PROP_VOLTAGE_NOW			0x0C
+#define GB_POWER_SUPPLY_PROP_VOLTAGE_AVG			0x0D
+#define GB_POWER_SUPPLY_PROP_VOLTAGE_OCV			0x0E
+#define GB_POWER_SUPPLY_PROP_VOLTAGE_BOOT			0x0F
+#define GB_POWER_SUPPLY_PROP_CURRENT_MAX			0x10
+#define GB_POWER_SUPPLY_PROP_CURRENT_NOW			0x11
+#define GB_POWER_SUPPLY_PROP_CURRENT_AVG			0x12
+#define GB_POWER_SUPPLY_PROP_CURRENT_BOOT			0x13
+#define GB_POWER_SUPPLY_PROP_POWER_NOW				0x14
+#define GB_POWER_SUPPLY_PROP_POWER_AVG				0x15
+#define GB_POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN			0x16
+#define GB_POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN		0x17
+#define GB_POWER_SUPPLY_PROP_CHARGE_FULL			0x18
+#define GB_POWER_SUPPLY_PROP_CHARGE_EMPTY			0x19
+#define GB_POWER_SUPPLY_PROP_CHARGE_NOW				0x1A
+#define GB_POWER_SUPPLY_PROP_CHARGE_AVG				0x1B
+#define GB_POWER_SUPPLY_PROP_CHARGE_COUNTER			0x1C
+#define GB_POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT		0x1D
+#define GB_POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX	0x1E
+#define GB_POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE		0x1F
+#define GB_POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX	0x20
+#define GB_POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT		0x21
+#define GB_POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX		0x22
+#define GB_POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT		0x23
+#define GB_POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN			0x24
+#define GB_POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN		0x25
+#define GB_POWER_SUPPLY_PROP_ENERGY_FULL			0x26
+#define GB_POWER_SUPPLY_PROP_ENERGY_EMPTY			0x27
+#define GB_POWER_SUPPLY_PROP_ENERGY_NOW				0x28
+#define GB_POWER_SUPPLY_PROP_ENERGY_AVG				0x29
+#define GB_POWER_SUPPLY_PROP_CAPACITY				0x2A
+#define GB_POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN			0x2B
+#define GB_POWER_SUPPLY_PROP_CAPACITY_ALERT_MAX			0x2C
+#define GB_POWER_SUPPLY_PROP_CAPACITY_LEVEL			0x2D
+#define GB_POWER_SUPPLY_PROP_TEMP				0x2E
+#define GB_POWER_SUPPLY_PROP_TEMP_MAX				0x2F
+#define GB_POWER_SUPPLY_PROP_TEMP_MIN				0x30
+#define GB_POWER_SUPPLY_PROP_TEMP_ALERT_MIN			0x31
+#define GB_POWER_SUPPLY_PROP_TEMP_ALERT_MAX			0x32
+#define GB_POWER_SUPPLY_PROP_TEMP_AMBIENT			0x33
+#define GB_POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MIN		0x34
+#define GB_POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MAX		0x35
+#define GB_POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW			0x36
+#define GB_POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG			0x37
+#define GB_POWER_SUPPLY_PROP_TIME_TO_FULL_NOW			0x38
+#define GB_POWER_SUPPLY_PROP_TIME_TO_FULL_AVG			0x39
+#define GB_POWER_SUPPLY_PROP_TYPE				0x3A
+#define GB_POWER_SUPPLY_PROP_SCOPE				0x3B
+#define GB_POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT		0x3C
+#define GB_POWER_SUPPLY_PROP_CALIBRATE				0x3D
+	__u8	is_writeable;
+} __packed;
+
+struct gb_power_supply_get_property_descriptors_request {
+	__u8	psy_id;
+} __packed;
+
+struct gb_power_supply_get_property_descriptors_response {
+	__u8	properties_count;
+	struct gb_power_supply_props_desc props[];
+} __packed;
+
+struct gb_power_supply_get_property_request {
+	__u8	psy_id;
+	__u8	property;
+} __packed;
+
+struct gb_power_supply_get_property_response {
+	__le32	prop_val;
+};
+
+struct gb_power_supply_set_property_request {
+	__u8	psy_id;
+	__u8	property;
+	__le32	prop_val;
+} __packed;
+
+struct gb_power_supply_event_request {
+	__u8	psy_id;
+	__u8	event;
+#define GB_POWER_SUPPLY_UPDATE		0x01
+} __packed;
+
+
+/* HID */
+
+/* Greybus HID operation types */
+#define GB_HID_TYPE_GET_DESC		0x02
+#define GB_HID_TYPE_GET_REPORT_DESC	0x03
+#define GB_HID_TYPE_PWR_ON		0x04
+#define GB_HID_TYPE_PWR_OFF		0x05
+#define GB_HID_TYPE_GET_REPORT		0x06
+#define GB_HID_TYPE_SET_REPORT		0x07
+#define GB_HID_TYPE_IRQ_EVENT		0x08
+
+/* Report type */
+#define GB_HID_INPUT_REPORT		0
+#define GB_HID_OUTPUT_REPORT		1
+#define GB_HID_FEATURE_REPORT		2
+
+/* Different request/response structures */
+/* HID get descriptor response */
+struct gb_hid_desc_response {
+	__u8				bLength;
+	__le16				wReportDescLength;
+	__le16				bcdHID;
+	__le16				wProductID;
+	__le16				wVendorID;
+	__u8				bCountryCode;
+} __packed;
+
+/* HID get report request/response */
+struct gb_hid_get_report_request {
+	__u8				report_type;
+	__u8				report_id;
+} __packed;
+
+/* HID set report request */
+struct gb_hid_set_report_request {
+	__u8				report_type;
+	__u8				report_id;
+	__u8				report[0];
+} __packed;
+
+/* HID input report request, via interrupt pipe */
+struct gb_hid_input_report_request {
+	__u8				report[0];
+} __packed;
+
+
+/* I2C */
+
+/* Greybus i2c request types */
+#define GB_I2C_TYPE_FUNCTIONALITY	0x02
+#define GB_I2C_TYPE_TRANSFER		0x05
+
+/* functionality request has no payload */
+struct gb_i2c_functionality_response {
+	__le32	functionality;
+} __packed;
+
+/*
+ * Outgoing data immediately follows the op count and ops array.
+ * The data for each write (master -> slave) op in the array is sent
+ * in order, with no (e.g. pad) bytes separating them.
+ *
+ * Short reads cause the entire transfer request to fail So response
+ * payload consists only of bytes read, and the number of bytes is
+ * exactly what was specified in the corresponding op.  Like
+ * outgoing data, the incoming data is in order and contiguous.
+ */
+struct gb_i2c_transfer_op {
+	__le16	addr;
+	__le16	flags;
+	__le16	size;
+} __packed;
+
+struct gb_i2c_transfer_request {
+	__le16				op_count;
+	struct gb_i2c_transfer_op	ops[0];		/* op_count of these */
+} __packed;
+struct gb_i2c_transfer_response {
+	__u8				data[0];	/* inbound data */
+} __packed;
+
+
+/* GPIO */
+
+/* Greybus GPIO request types */
+#define GB_GPIO_TYPE_LINE_COUNT		0x02
+#define GB_GPIO_TYPE_ACTIVATE		0x03
+#define GB_GPIO_TYPE_DEACTIVATE		0x04
+#define GB_GPIO_TYPE_GET_DIRECTION	0x05
+#define GB_GPIO_TYPE_DIRECTION_IN	0x06
+#define GB_GPIO_TYPE_DIRECTION_OUT	0x07
+#define GB_GPIO_TYPE_GET_VALUE		0x08
+#define GB_GPIO_TYPE_SET_VALUE		0x09
+#define GB_GPIO_TYPE_SET_DEBOUNCE	0x0a
+#define GB_GPIO_TYPE_IRQ_TYPE		0x0b
+#define GB_GPIO_TYPE_IRQ_MASK		0x0c
+#define GB_GPIO_TYPE_IRQ_UNMASK		0x0d
+#define GB_GPIO_TYPE_IRQ_EVENT		0x0e
+
+#define GB_GPIO_IRQ_TYPE_NONE		0x00
+#define GB_GPIO_IRQ_TYPE_EDGE_RISING	0x01
+#define GB_GPIO_IRQ_TYPE_EDGE_FALLING	0x02
+#define GB_GPIO_IRQ_TYPE_EDGE_BOTH	0x03
+#define GB_GPIO_IRQ_TYPE_LEVEL_HIGH	0x04
+#define GB_GPIO_IRQ_TYPE_LEVEL_LOW	0x08
+
+/* line count request has no payload */
+struct gb_gpio_line_count_response {
+	__u8	count;
+} __packed;
+
+struct gb_gpio_activate_request {
+	__u8	which;
+} __packed;
+/* activate response has no payload */
+
+struct gb_gpio_deactivate_request {
+	__u8	which;
+} __packed;
+/* deactivate response has no payload */
+
+struct gb_gpio_get_direction_request {
+	__u8	which;
+} __packed;
+struct gb_gpio_get_direction_response {
+	__u8	direction;
+} __packed;
+
+struct gb_gpio_direction_in_request {
+	__u8	which;
+} __packed;
+/* direction in response has no payload */
+
+struct gb_gpio_direction_out_request {
+	__u8	which;
+	__u8	value;
+} __packed;
+/* direction out response has no payload */
+
+struct gb_gpio_get_value_request {
+	__u8	which;
+} __packed;
+struct gb_gpio_get_value_response {
+	__u8	value;
+} __packed;
+
+struct gb_gpio_set_value_request {
+	__u8	which;
+	__u8	value;
+} __packed;
+/* set value response has no payload */
+
+struct gb_gpio_set_debounce_request {
+	__u8	which;
+	__le16	usec;
+} __packed;
+/* debounce response has no payload */
+
+struct gb_gpio_irq_type_request {
+	__u8	which;
+	__u8	type;
+} __packed;
+/* irq type response has no payload */
+
+struct gb_gpio_irq_mask_request {
+	__u8	which;
+} __packed;
+/* irq mask response has no payload */
+
+struct gb_gpio_irq_unmask_request {
+	__u8	which;
+} __packed;
+/* irq unmask response has no payload */
+
+/* irq event requests originate on another module and are handled on the AP */
+struct gb_gpio_irq_event_request {
+	__u8	which;
+} __packed;
+/* irq event has no response */
+
+
+/* PWM */
+
+/* Greybus PWM operation types */
+#define GB_PWM_TYPE_PWM_COUNT		0x02
+#define GB_PWM_TYPE_ACTIVATE		0x03
+#define GB_PWM_TYPE_DEACTIVATE		0x04
+#define GB_PWM_TYPE_CONFIG		0x05
+#define GB_PWM_TYPE_POLARITY		0x06
+#define GB_PWM_TYPE_ENABLE		0x07
+#define GB_PWM_TYPE_DISABLE		0x08
+
+/* pwm count request has no payload */
+struct gb_pwm_count_response {
+	__u8	count;
+} __packed;
+
+struct gb_pwm_activate_request {
+	__u8	which;
+} __packed;
+
+struct gb_pwm_deactivate_request {
+	__u8	which;
+} __packed;
+
+struct gb_pwm_config_request {
+	__u8	which;
+	__le32	duty;
+	__le32	period;
+} __packed;
+
+struct gb_pwm_polarity_request {
+	__u8	which;
+	__u8	polarity;
+} __packed;
+
+struct gb_pwm_enable_request {
+	__u8	which;
+} __packed;
+
+struct gb_pwm_disable_request {
+	__u8	which;
+} __packed;
+
+/* SPI */
+
+/* Should match up with modes in linux/spi/spi.h */
+#define GB_SPI_MODE_CPHA		0x01		/* clock phase */
+#define GB_SPI_MODE_CPOL		0x02		/* clock polarity */
+#define GB_SPI_MODE_MODE_0		(0 | 0)		/* (original MicroWire) */
+#define GB_SPI_MODE_MODE_1		(0 | GB_SPI_MODE_CPHA)
+#define GB_SPI_MODE_MODE_2		(GB_SPI_MODE_CPOL | 0)
+#define GB_SPI_MODE_MODE_3		(GB_SPI_MODE_CPOL | GB_SPI_MODE_CPHA)
+#define GB_SPI_MODE_CS_HIGH		0x04		/* chipselect active high? */
+#define GB_SPI_MODE_LSB_FIRST		0x08		/* per-word bits-on-wire */
+#define GB_SPI_MODE_3WIRE		0x10		/* SI/SO signals shared */
+#define GB_SPI_MODE_LOOP		0x20		/* loopback mode */
+#define GB_SPI_MODE_NO_CS		0x40		/* 1 dev/bus, no chipselect */
+#define GB_SPI_MODE_READY		0x80		/* slave pulls low to pause */
+
+/* Should match up with flags in linux/spi/spi.h */
+#define GB_SPI_FLAG_HALF_DUPLEX		BIT(0)		/* can't do full duplex */
+#define GB_SPI_FLAG_NO_RX		BIT(1)		/* can't do buffer read */
+#define GB_SPI_FLAG_NO_TX		BIT(2)		/* can't do buffer write */
+
+/* Greybus spi operation types */
+#define GB_SPI_TYPE_MASTER_CONFIG	0x02
+#define GB_SPI_TYPE_DEVICE_CONFIG	0x03
+#define GB_SPI_TYPE_TRANSFER		0x04
+
+/* mode request has no payload */
+struct gb_spi_master_config_response {
+	__le32	bits_per_word_mask;
+	__le32	min_speed_hz;
+	__le32	max_speed_hz;
+	__le16	mode;
+	__le16	flags;
+	__u8	num_chipselect;
+} __packed;
+
+struct gb_spi_device_config_request {
+	__u8	chip_select;
+} __packed;
+
+struct gb_spi_device_config_response {
+	__le16	mode;
+	__u8	bits_per_word;
+	__le32	max_speed_hz;
+	__u8	device_type;
+#define GB_SPI_SPI_DEV		0x00
+#define GB_SPI_SPI_NOR		0x01
+#define GB_SPI_SPI_MODALIAS	0x02
+	__u8	name[32];
+} __packed;
+
+/**
+ * struct gb_spi_transfer - a read/write buffer pair
+ * @speed_hz: Select a speed other than the device default for this transfer. If
+ *	0 the default (from @spi_device) is used.
+ * @len: size of rx and tx buffers (in bytes)
+ * @delay_usecs: microseconds to delay after this transfer before (optionally)
+ * 	changing the chipselect status, then starting the next transfer or
+ * 	completing this spi_message.
+ * @cs_change: affects chipselect after this transfer completes
+ * @bits_per_word: select a bits_per_word other than the device default for this
+ *	transfer. If 0 the default (from @spi_device) is used.
+ */
+struct gb_spi_transfer {
+	__le32		speed_hz;
+	__le32		len;
+	__le16		delay_usecs;
+	__u8		cs_change;
+	__u8		bits_per_word;
+	__u8		xfer_flags;
+#define GB_SPI_XFER_READ	0x01
+#define GB_SPI_XFER_WRITE	0x02
+#define GB_SPI_XFER_INPROGRESS	0x04
+} __packed;
+
+struct gb_spi_transfer_request {
+	__u8			chip_select;	/* of the spi device */
+	__u8			mode;		/* of the spi device */
+	__le16			count;
+	struct gb_spi_transfer	transfers[0];	/* count of these */
+} __packed;
+
+struct gb_spi_transfer_response {
+	__u8			data[0];	/* inbound data */
+} __packed;
+
+/* Version of the Greybus SVC protocol we support */
+#define GB_SVC_VERSION_MAJOR		0x00
+#define GB_SVC_VERSION_MINOR		0x01
+
+/* Greybus SVC request types */
+#define GB_SVC_TYPE_PROTOCOL_VERSION		0x01
+#define GB_SVC_TYPE_SVC_HELLO			0x02
+#define GB_SVC_TYPE_INTF_DEVICE_ID		0x03
+#define GB_SVC_TYPE_INTF_RESET			0x06
+#define GB_SVC_TYPE_CONN_CREATE			0x07
+#define GB_SVC_TYPE_CONN_DESTROY		0x08
+#define GB_SVC_TYPE_DME_PEER_GET		0x09
+#define GB_SVC_TYPE_DME_PEER_SET		0x0a
+#define GB_SVC_TYPE_ROUTE_CREATE		0x0b
+#define GB_SVC_TYPE_ROUTE_DESTROY		0x0c
+#define GB_SVC_TYPE_TIMESYNC_ENABLE		0x0d
+#define GB_SVC_TYPE_TIMESYNC_DISABLE		0x0e
+#define GB_SVC_TYPE_TIMESYNC_AUTHORITATIVE	0x0f
+#define GB_SVC_TYPE_INTF_SET_PWRM		0x10
+#define GB_SVC_TYPE_INTF_EJECT			0x11
+#define GB_SVC_TYPE_PING			0x13
+#define GB_SVC_TYPE_PWRMON_RAIL_COUNT_GET	0x14
+#define GB_SVC_TYPE_PWRMON_RAIL_NAMES_GET	0x15
+#define GB_SVC_TYPE_PWRMON_SAMPLE_GET		0x16
+#define GB_SVC_TYPE_PWRMON_INTF_SAMPLE_GET	0x17
+#define GB_SVC_TYPE_TIMESYNC_WAKE_PINS_ACQUIRE	0x18
+#define GB_SVC_TYPE_TIMESYNC_WAKE_PINS_RELEASE	0x19
+#define GB_SVC_TYPE_TIMESYNC_PING		0x1a
+#define GB_SVC_TYPE_MODULE_INSERTED		0x1f
+#define GB_SVC_TYPE_MODULE_REMOVED		0x20
+#define GB_SVC_TYPE_INTF_VSYS_ENABLE		0x21
+#define GB_SVC_TYPE_INTF_VSYS_DISABLE		0x22
+#define GB_SVC_TYPE_INTF_REFCLK_ENABLE		0x23
+#define GB_SVC_TYPE_INTF_REFCLK_DISABLE		0x24
+#define GB_SVC_TYPE_INTF_UNIPRO_ENABLE		0x25
+#define GB_SVC_TYPE_INTF_UNIPRO_DISABLE		0x26
+#define GB_SVC_TYPE_INTF_ACTIVATE		0x27
+#define GB_SVC_TYPE_INTF_RESUME			0x28
+#define GB_SVC_TYPE_INTF_MAILBOX_EVENT		0x29
+#define GB_SVC_TYPE_INTF_OOPS			0x2a
+
+/* Greybus SVC protocol status values */
+#define GB_SVC_OP_SUCCESS			0x00
+#define GB_SVC_OP_UNKNOWN_ERROR			0x01
+#define GB_SVC_INTF_NOT_DETECTED		0x02
+#define GB_SVC_INTF_NO_UPRO_LINK		0x03
+#define GB_SVC_INTF_UPRO_NOT_DOWN		0x04
+#define GB_SVC_INTF_UPRO_NOT_HIBERNATED		0x05
+#define GB_SVC_INTF_NO_V_SYS			0x06
+#define GB_SVC_INTF_V_CHG			0x07
+#define GB_SVC_INTF_WAKE_BUSY			0x08
+#define GB_SVC_INTF_NO_REFCLK			0x09
+#define GB_SVC_INTF_RELEASING			0x0a
+#define GB_SVC_INTF_NO_ORDER			0x0b
+#define GB_SVC_INTF_MBOX_SET			0x0c
+#define GB_SVC_INTF_BAD_MBOX			0x0d
+#define GB_SVC_INTF_OP_TIMEOUT			0x0e
+#define GB_SVC_PWRMON_OP_NOT_PRESENT		0x0f
+
+struct gb_svc_version_request {
+	__u8	major;
+	__u8	minor;
+} __packed;
+
+struct gb_svc_version_response {
+	__u8	major;
+	__u8	minor;
+} __packed;
+
+/* SVC protocol hello request */
+struct gb_svc_hello_request {
+	__le16			endo_id;
+	__u8			interface_id;
+} __packed;
+/* hello response has no payload */
+
+struct gb_svc_intf_device_id_request {
+	__u8	intf_id;
+	__u8	device_id;
+} __packed;
+/* device id response has no payload */
+
+struct gb_svc_intf_reset_request {
+	__u8	intf_id;
+} __packed;
+/* interface reset response has no payload */
+
+struct gb_svc_intf_eject_request {
+	__u8	intf_id;
+} __packed;
+/* interface eject response has no payload */
+
+struct gb_svc_conn_create_request {
+	__u8	intf1_id;
+	__le16	cport1_id;
+	__u8	intf2_id;
+	__le16	cport2_id;
+	__u8	tc;
+	__u8	flags;
+} __packed;
+/* connection create response has no payload */
+
+struct gb_svc_conn_destroy_request {
+	__u8	intf1_id;
+	__le16	cport1_id;
+	__u8	intf2_id;
+	__le16	cport2_id;
+} __packed;
+/* connection destroy response has no payload */
+
+struct gb_svc_dme_peer_get_request {
+	__u8	intf_id;
+	__le16	attr;
+	__le16	selector;
+} __packed;
+
+struct gb_svc_dme_peer_get_response {
+	__le16	result_code;
+	__le32	attr_value;
+} __packed;
+
+struct gb_svc_dme_peer_set_request {
+	__u8	intf_id;
+	__le16	attr;
+	__le16	selector;
+	__le32	value;
+} __packed;
+
+struct gb_svc_dme_peer_set_response {
+	__le16	result_code;
+} __packed;
+
+/* Greybus init-status values, currently retrieved using DME peer gets. */
+#define GB_INIT_SPI_BOOT_STARTED			0x02
+#define GB_INIT_TRUSTED_SPI_BOOT_FINISHED		0x03
+#define GB_INIT_UNTRUSTED_SPI_BOOT_FINISHED		0x04
+#define GB_INIT_BOOTROM_UNIPRO_BOOT_STARTED		0x06
+#define GB_INIT_BOOTROM_FALLBACK_UNIPRO_BOOT_STARTED	0x09
+#define GB_INIT_S2_LOADER_BOOT_STARTED			0x0D
+
+struct gb_svc_route_create_request {
+	__u8	intf1_id;
+	__u8	dev1_id;
+	__u8	intf2_id;
+	__u8	dev2_id;
+} __packed;
+/* route create response has no payload */
+
+struct gb_svc_route_destroy_request {
+	__u8	intf1_id;
+	__u8	intf2_id;
+} __packed;
+/* route destroy response has no payload */
+
+/* used for svc_intf_vsys_{enable,disable} */
+struct gb_svc_intf_vsys_request {
+	__u8	intf_id;
+} __packed;
+
+struct gb_svc_intf_vsys_response {
+	__u8	result_code;
+#define GB_SVC_INTF_VSYS_OK				0x00
+	/* 0x01 is reserved */
+#define GB_SVC_INTF_VSYS_FAIL				0x02
+} __packed;
+
+/* used for svc_intf_refclk_{enable,disable} */
+struct gb_svc_intf_refclk_request {
+	__u8	intf_id;
+} __packed;
+
+struct gb_svc_intf_refclk_response {
+	__u8	result_code;
+#define GB_SVC_INTF_REFCLK_OK				0x00
+	/* 0x01 is reserved */
+#define GB_SVC_INTF_REFCLK_FAIL				0x02
+} __packed;
+
+/* used for svc_intf_unipro_{enable,disable} */
+struct gb_svc_intf_unipro_request {
+	__u8	intf_id;
+} __packed;
+
+struct gb_svc_intf_unipro_response {
+	__u8	result_code;
+#define GB_SVC_INTF_UNIPRO_OK				0x00
+	/* 0x01 is reserved */
+#define GB_SVC_INTF_UNIPRO_FAIL				0x02
+#define GB_SVC_INTF_UNIPRO_NOT_OFF			0x03
+} __packed;
+
+#define GB_SVC_UNIPRO_FAST_MODE			0x01
+#define GB_SVC_UNIPRO_SLOW_MODE			0x02
+#define GB_SVC_UNIPRO_FAST_AUTO_MODE		0x04
+#define GB_SVC_UNIPRO_SLOW_AUTO_MODE		0x05
+#define GB_SVC_UNIPRO_MODE_UNCHANGED		0x07
+#define GB_SVC_UNIPRO_HIBERNATE_MODE		0x11
+#define GB_SVC_UNIPRO_OFF_MODE			0x12
+
+#define GB_SVC_SMALL_AMPLITUDE          0x01
+#define GB_SVC_LARGE_AMPLITUDE          0x02
+
+#define GB_SVC_NO_DE_EMPHASIS           0x00
+#define GB_SVC_SMALL_DE_EMPHASIS        0x01
+#define GB_SVC_LARGE_DE_EMPHASIS        0x02
+
+#define GB_SVC_PWRM_RXTERMINATION		0x01
+#define GB_SVC_PWRM_TXTERMINATION		0x02
+#define GB_SVC_PWRM_LINE_RESET			0x04
+#define GB_SVC_PWRM_SCRAMBLING			0x20
+
+#define GB_SVC_PWRM_QUIRK_HSSER			0x00000001
+
+#define GB_SVC_UNIPRO_HS_SERIES_A		0x01
+#define GB_SVC_UNIPRO_HS_SERIES_B		0x02
+
+#define GB_SVC_SETPWRM_PWR_OK           0x00
+#define GB_SVC_SETPWRM_PWR_LOCAL        0x01
+#define GB_SVC_SETPWRM_PWR_REMOTE       0x02
+#define GB_SVC_SETPWRM_PWR_BUSY         0x03
+#define GB_SVC_SETPWRM_PWR_ERROR_CAP    0x04
+#define GB_SVC_SETPWRM_PWR_FATAL_ERROR  0x05
+
+struct gb_svc_l2_timer_cfg {
+	__le16 tsb_fc0_protection_timeout;
+	__le16 tsb_tc0_replay_timeout;
+	__le16 tsb_afc0_req_timeout;
+	__le16 tsb_fc1_protection_timeout;
+	__le16 tsb_tc1_replay_timeout;
+	__le16 tsb_afc1_req_timeout;
+	__le16 reserved_for_tc2[3];
+	__le16 reserved_for_tc3[3];
+} __packed;
+
+struct gb_svc_intf_set_pwrm_request {
+	__u8	intf_id;
+	__u8	hs_series;
+	__u8	tx_mode;
+	__u8	tx_gear;
+	__u8	tx_nlanes;
+	__u8	tx_amplitude;
+	__u8	tx_hs_equalizer;
+	__u8	rx_mode;
+	__u8	rx_gear;
+	__u8	rx_nlanes;
+	__u8	flags;
+	__le32	quirks;
+	struct gb_svc_l2_timer_cfg local_l2timerdata, remote_l2timerdata;
+} __packed;
+
+struct gb_svc_intf_set_pwrm_response {
+	__u8	result_code;
+} __packed;
+
+struct gb_svc_key_event_request {
+	__le16  key_code;
+#define GB_KEYCODE_ARA         0x00
+
+	__u8    key_event;
+#define GB_SVC_KEY_RELEASED    0x00
+#define GB_SVC_KEY_PRESSED     0x01
+} __packed;
+
+#define GB_SVC_PWRMON_MAX_RAIL_COUNT		254
+
+struct gb_svc_pwrmon_rail_count_get_response {
+	__u8	rail_count;
+} __packed;
+
+#define GB_SVC_PWRMON_RAIL_NAME_BUFSIZE		32
+
+struct gb_svc_pwrmon_rail_names_get_response {
+	__u8	status;
+	__u8	name[0][GB_SVC_PWRMON_RAIL_NAME_BUFSIZE];
+} __packed;
+
+#define GB_SVC_PWRMON_TYPE_CURR			0x01
+#define GB_SVC_PWRMON_TYPE_VOL			0x02
+#define GB_SVC_PWRMON_TYPE_PWR			0x03
+
+#define GB_SVC_PWRMON_GET_SAMPLE_OK		0x00
+#define GB_SVC_PWRMON_GET_SAMPLE_INVAL		0x01
+#define GB_SVC_PWRMON_GET_SAMPLE_NOSUPP		0x02
+#define GB_SVC_PWRMON_GET_SAMPLE_HWERR		0x03
+
+struct gb_svc_pwrmon_sample_get_request {
+	__u8	rail_id;
+	__u8	measurement_type;
+} __packed;
+
+struct gb_svc_pwrmon_sample_get_response {
+	__u8	result;
+	__le32	measurement;
+} __packed;
+
+struct gb_svc_pwrmon_intf_sample_get_request {
+	__u8	intf_id;
+	__u8	measurement_type;
+} __packed;
+
+struct gb_svc_pwrmon_intf_sample_get_response {
+	__u8	result;
+	__le32	measurement;
+} __packed;
+
+#define GB_SVC_MODULE_INSERTED_FLAG_NO_PRIMARY	0x0001
+
+struct gb_svc_module_inserted_request {
+	__u8	primary_intf_id;
+	__u8	intf_count;
+	__le16	flags;
+} __packed;
+/* module_inserted response has no payload */
+
+struct gb_svc_module_removed_request {
+	__u8	primary_intf_id;
+} __packed;
+/* module_removed response has no payload */
+
+struct gb_svc_intf_activate_request {
+	__u8	intf_id;
+} __packed;
+
+#define GB_SVC_INTF_TYPE_UNKNOWN		0x00
+#define GB_SVC_INTF_TYPE_DUMMY			0x01
+#define GB_SVC_INTF_TYPE_UNIPRO			0x02
+#define GB_SVC_INTF_TYPE_GREYBUS		0x03
+
+struct gb_svc_intf_activate_response {
+	__u8	status;
+	__u8	intf_type;
+} __packed;
+
+struct gb_svc_intf_resume_request {
+	__u8	intf_id;
+} __packed;
+
+struct gb_svc_intf_resume_response {
+	__u8	status;
+} __packed;
+
+#define GB_SVC_INTF_MAILBOX_NONE		0x00
+#define GB_SVC_INTF_MAILBOX_AP			0x01
+#define GB_SVC_INTF_MAILBOX_GREYBUS		0x02
+
+struct gb_svc_intf_mailbox_event_request {
+	__u8	intf_id;
+	__le16	result_code;
+	__le32	mailbox;
+} __packed;
+/* intf_mailbox_event response has no payload */
+
+struct gb_svc_intf_oops_request {
+	__u8	intf_id;
+	__u8	reason;
+} __packed;
+/* intf_oops response has no payload */
+
+
+/* RAW */
+
+/* Greybus raw request types */
+#define	GB_RAW_TYPE_SEND			0x02
+
+struct gb_raw_send_request {
+	__le32	len;
+	__u8	data[0];
+} __packed;
+
+
+/* UART */
+
+/* Greybus UART operation types */
+#define GB_UART_TYPE_SEND_DATA			0x02
+#define GB_UART_TYPE_RECEIVE_DATA		0x03	/* Unsolicited data */
+#define GB_UART_TYPE_SET_LINE_CODING		0x04
+#define GB_UART_TYPE_SET_CONTROL_LINE_STATE	0x05
+#define GB_UART_TYPE_SEND_BREAK			0x06
+#define GB_UART_TYPE_SERIAL_STATE		0x07	/* Unsolicited data */
+#define GB_UART_TYPE_RECEIVE_CREDITS		0x08
+#define GB_UART_TYPE_FLUSH_FIFOS		0x09
+
+/* Represents data from AP -> Module */
+struct gb_uart_send_data_request {
+	__le16	size;
+	__u8	data[0];
+} __packed;
+
+/* recv-data-request flags */
+#define GB_UART_RECV_FLAG_FRAMING		0x01	/* Framing error */
+#define GB_UART_RECV_FLAG_PARITY		0x02	/* Parity error */
+#define GB_UART_RECV_FLAG_OVERRUN		0x04	/* Overrun error */
+#define GB_UART_RECV_FLAG_BREAK			0x08	/* Break */
+
+/* Represents data from Module -> AP */
+struct gb_uart_recv_data_request {
+	__le16	size;
+	__u8	flags;
+	__u8	data[0];
+} __packed;
+
+struct gb_uart_receive_credits_request {
+	__le16  count;
+} __packed;
+
+struct gb_uart_set_line_coding_request {
+	__le32	rate;
+	__u8	format;
+#define GB_SERIAL_1_STOP_BITS			0
+#define GB_SERIAL_1_5_STOP_BITS			1
+#define GB_SERIAL_2_STOP_BITS			2
+
+	__u8	parity;
+#define GB_SERIAL_NO_PARITY			0
+#define GB_SERIAL_ODD_PARITY			1
+#define GB_SERIAL_EVEN_PARITY			2
+#define GB_SERIAL_MARK_PARITY			3
+#define GB_SERIAL_SPACE_PARITY			4
+
+	__u8	data_bits;
+
+	__u8	flow_control;
+#define GB_SERIAL_AUTO_RTSCTS_EN		0x1
+} __packed;
+
+/* output control lines */
+#define GB_UART_CTRL_DTR			0x01
+#define GB_UART_CTRL_RTS			0x02
+
+struct gb_uart_set_control_line_state_request {
+	__u8	control;
+} __packed;
+
+struct gb_uart_set_break_request {
+	__u8	state;
+} __packed;
+
+/* input control lines and line errors */
+#define GB_UART_CTRL_DCD			0x01
+#define GB_UART_CTRL_DSR			0x02
+#define GB_UART_CTRL_RI				0x04
+
+struct gb_uart_serial_state_request {
+	__u8	control;
+} __packed;
+
+struct gb_uart_serial_flush_request {
+	__u8    flags;
+#define GB_SERIAL_FLAG_FLUSH_TRANSMITTER	0x01
+#define GB_SERIAL_FLAG_FLUSH_RECEIVER		0x02
+} __packed;
+
+/* Loopback */
+
+/* Greybus loopback request types */
+#define GB_LOOPBACK_TYPE_PING			0x02
+#define GB_LOOPBACK_TYPE_TRANSFER		0x03
+#define GB_LOOPBACK_TYPE_SINK			0x04
+
+/*
+ * Loopback request/response header format should be identical
+ * to simplify bandwidth and data movement analysis.
+ */
+struct gb_loopback_transfer_request {
+	__le32	len;
+	__le32  reserved0;
+	__le32  reserved1;
+	__u8	data[0];
+} __packed;
+
+struct gb_loopback_transfer_response {
+	__le32	len;
+	__le32	reserved0;
+	__le32	reserved1;
+	__u8	data[0];
+} __packed;
+
+/* SDIO */
+/* Greybus SDIO operation types */
+#define GB_SDIO_TYPE_GET_CAPABILITIES		0x02
+#define GB_SDIO_TYPE_SET_IOS			0x03
+#define GB_SDIO_TYPE_COMMAND			0x04
+#define GB_SDIO_TYPE_TRANSFER			0x05
+#define GB_SDIO_TYPE_EVENT			0x06
+
+/* get caps response: request has no payload */
+struct gb_sdio_get_caps_response {
+	__le32	caps;
+#define GB_SDIO_CAP_NONREMOVABLE	0x00000001
+#define GB_SDIO_CAP_4_BIT_DATA		0x00000002
+#define GB_SDIO_CAP_8_BIT_DATA		0x00000004
+#define GB_SDIO_CAP_MMC_HS		0x00000008
+#define GB_SDIO_CAP_SD_HS		0x00000010
+#define GB_SDIO_CAP_ERASE		0x00000020
+#define GB_SDIO_CAP_1_2V_DDR		0x00000040
+#define GB_SDIO_CAP_1_8V_DDR		0x00000080
+#define GB_SDIO_CAP_POWER_OFF_CARD	0x00000100
+#define GB_SDIO_CAP_UHS_SDR12		0x00000200
+#define GB_SDIO_CAP_UHS_SDR25		0x00000400
+#define GB_SDIO_CAP_UHS_SDR50		0x00000800
+#define GB_SDIO_CAP_UHS_SDR104		0x00001000
+#define GB_SDIO_CAP_UHS_DDR50		0x00002000
+#define GB_SDIO_CAP_DRIVER_TYPE_A	0x00004000
+#define GB_SDIO_CAP_DRIVER_TYPE_C	0x00008000
+#define GB_SDIO_CAP_DRIVER_TYPE_D	0x00010000
+#define GB_SDIO_CAP_HS200_1_2V		0x00020000
+#define GB_SDIO_CAP_HS200_1_8V		0x00040000
+#define GB_SDIO_CAP_HS400_1_2V		0x00080000
+#define GB_SDIO_CAP_HS400_1_8V		0x00100000
+
+	/* see possible values below at vdd */
+	__le32 ocr;
+	__le32 f_min;
+	__le32 f_max;
+	__le16 max_blk_count;
+	__le16 max_blk_size;
+} __packed;
+
+/* set ios request: response has no payload */
+struct gb_sdio_set_ios_request {
+	__le32	clock;
+	__le32	vdd;
+#define GB_SDIO_VDD_165_195	0x00000001
+#define GB_SDIO_VDD_20_21	0x00000002
+#define GB_SDIO_VDD_21_22	0x00000004
+#define GB_SDIO_VDD_22_23	0x00000008
+#define GB_SDIO_VDD_23_24	0x00000010
+#define GB_SDIO_VDD_24_25	0x00000020
+#define GB_SDIO_VDD_25_26	0x00000040
+#define GB_SDIO_VDD_26_27	0x00000080
+#define GB_SDIO_VDD_27_28	0x00000100
+#define GB_SDIO_VDD_28_29	0x00000200
+#define GB_SDIO_VDD_29_30	0x00000400
+#define GB_SDIO_VDD_30_31	0x00000800
+#define GB_SDIO_VDD_31_32	0x00001000
+#define GB_SDIO_VDD_32_33	0x00002000
+#define GB_SDIO_VDD_33_34	0x00004000
+#define GB_SDIO_VDD_34_35	0x00008000
+#define GB_SDIO_VDD_35_36	0x00010000
+
+	__u8	bus_mode;
+#define GB_SDIO_BUSMODE_OPENDRAIN	0x00
+#define GB_SDIO_BUSMODE_PUSHPULL	0x01
+
+	__u8	power_mode;
+#define GB_SDIO_POWER_OFF	0x00
+#define GB_SDIO_POWER_UP	0x01
+#define GB_SDIO_POWER_ON	0x02
+#define GB_SDIO_POWER_UNDEFINED	0x03
+
+	__u8	bus_width;
+#define GB_SDIO_BUS_WIDTH_1	0x00
+#define GB_SDIO_BUS_WIDTH_4	0x02
+#define GB_SDIO_BUS_WIDTH_8	0x03
+
+	__u8	timing;
+#define GB_SDIO_TIMING_LEGACY		0x00
+#define GB_SDIO_TIMING_MMC_HS		0x01
+#define GB_SDIO_TIMING_SD_HS		0x02
+#define GB_SDIO_TIMING_UHS_SDR12	0x03
+#define GB_SDIO_TIMING_UHS_SDR25	0x04
+#define GB_SDIO_TIMING_UHS_SDR50	0x05
+#define GB_SDIO_TIMING_UHS_SDR104	0x06
+#define GB_SDIO_TIMING_UHS_DDR50	0x07
+#define GB_SDIO_TIMING_MMC_DDR52	0x08
+#define GB_SDIO_TIMING_MMC_HS200	0x09
+#define GB_SDIO_TIMING_MMC_HS400	0x0A
+
+	__u8	signal_voltage;
+#define GB_SDIO_SIGNAL_VOLTAGE_330	0x00
+#define GB_SDIO_SIGNAL_VOLTAGE_180	0x01
+#define GB_SDIO_SIGNAL_VOLTAGE_120	0x02
+
+	__u8	drv_type;
+#define GB_SDIO_SET_DRIVER_TYPE_B	0x00
+#define GB_SDIO_SET_DRIVER_TYPE_A	0x01
+#define GB_SDIO_SET_DRIVER_TYPE_C	0x02
+#define GB_SDIO_SET_DRIVER_TYPE_D	0x03
+} __packed;
+
+/* command request */
+struct gb_sdio_command_request {
+	__u8	cmd;
+	__u8	cmd_flags;
+#define GB_SDIO_RSP_NONE		0x00
+#define GB_SDIO_RSP_PRESENT		0x01
+#define GB_SDIO_RSP_136			0x02
+#define GB_SDIO_RSP_CRC			0x04
+#define GB_SDIO_RSP_BUSY		0x08
+#define GB_SDIO_RSP_OPCODE		0x10
+
+	__u8	cmd_type;
+#define GB_SDIO_CMD_AC		0x00
+#define GB_SDIO_CMD_ADTC	0x01
+#define GB_SDIO_CMD_BC		0x02
+#define GB_SDIO_CMD_BCR		0x03
+
+	__le32	cmd_arg;
+	__le16	data_blocks;
+	__le16	data_blksz;
+} __packed;
+
+struct gb_sdio_command_response {
+	__le32	resp[4];
+} __packed;
+
+/* transfer request */
+struct gb_sdio_transfer_request {
+	__u8	data_flags;
+#define GB_SDIO_DATA_WRITE	0x01
+#define GB_SDIO_DATA_READ	0x02
+#define GB_SDIO_DATA_STREAM	0x04
+
+	__le16	data_blocks;
+	__le16	data_blksz;
+	__u8	data[0];
+} __packed;
+
+struct gb_sdio_transfer_response {
+	__le16	data_blocks;
+	__le16	data_blksz;
+	__u8	data[0];
+} __packed;
+
+/* event request: generated by module and is defined as unidirectional */
+struct gb_sdio_event_request {
+	__u8	event;
+#define GB_SDIO_CARD_INSERTED	0x01
+#define GB_SDIO_CARD_REMOVED	0x02
+#define GB_SDIO_WP		0x04
+} __packed;
+
+/* Camera */
+
+/* Greybus Camera request types */
+#define GB_CAMERA_TYPE_CAPABILITIES		0x02
+#define GB_CAMERA_TYPE_CONFIGURE_STREAMS	0x03
+#define GB_CAMERA_TYPE_CAPTURE			0x04
+#define GB_CAMERA_TYPE_FLUSH			0x05
+#define GB_CAMERA_TYPE_METADATA			0x06
+
+#define GB_CAMERA_MAX_STREAMS			4
+#define GB_CAMERA_MAX_SETTINGS_SIZE		8192
+
+/* Greybus Camera Configure Streams request payload */
+struct gb_camera_stream_config_request {
+	__le16 width;
+	__le16 height;
+	__le16 format;
+	__le16 padding;
+} __packed;
+
+struct gb_camera_configure_streams_request {
+	__u8 num_streams;
+	__u8 flags;
+#define GB_CAMERA_CONFIGURE_STREAMS_TEST_ONLY	0x01
+	__le16 padding;
+	struct gb_camera_stream_config_request config[0];
+} __packed;
+
+/* Greybus Camera Configure Streams response payload */
+struct gb_camera_stream_config_response {
+	__le16 width;
+	__le16 height;
+	__le16 format;
+	__u8 virtual_channel;
+	__u8 data_type[2];
+	__le16 max_pkt_size;
+	__u8 padding;
+	__le32 max_size;
+} __packed;
+
+struct gb_camera_configure_streams_response {
+	__u8 num_streams;
+#define GB_CAMERA_CONFIGURE_STREAMS_ADJUSTED	0x01
+	__u8 flags;
+	__u8 padding[2];
+	__le32 data_rate;
+	struct gb_camera_stream_config_response config[0];
+};
+
+/* Greybus Camera Capture request payload - response has no payload */
+struct gb_camera_capture_request {
+	__le32 request_id;
+	__u8 streams;
+	__u8 padding;
+	__le16 num_frames;
+	__u8 settings[0];
+} __packed;
+
+/* Greybus Camera Flush response payload - request has no payload */
+struct gb_camera_flush_response {
+	__le32 request_id;
+} __packed;
+
+/* Greybus Camera Metadata request payload - operation has no response */
+struct gb_camera_metadata_request {
+	__le32 request_id;
+	__le16 frame_number;
+	__u8 stream;
+	__u8 padding;
+	__u8 metadata[0];
+} __packed;
+
+/* Lights */
+
+/* Greybus Lights request types */
+#define GB_LIGHTS_TYPE_GET_LIGHTS		0x02
+#define GB_LIGHTS_TYPE_GET_LIGHT_CONFIG		0x03
+#define GB_LIGHTS_TYPE_GET_CHANNEL_CONFIG	0x04
+#define GB_LIGHTS_TYPE_GET_CHANNEL_FLASH_CONFIG	0x05
+#define GB_LIGHTS_TYPE_SET_BRIGHTNESS		0x06
+#define GB_LIGHTS_TYPE_SET_BLINK		0x07
+#define GB_LIGHTS_TYPE_SET_COLOR		0x08
+#define GB_LIGHTS_TYPE_SET_FADE			0x09
+#define GB_LIGHTS_TYPE_EVENT			0x0A
+#define GB_LIGHTS_TYPE_SET_FLASH_INTENSITY	0x0B
+#define GB_LIGHTS_TYPE_SET_FLASH_STROBE		0x0C
+#define GB_LIGHTS_TYPE_SET_FLASH_TIMEOUT	0x0D
+#define GB_LIGHTS_TYPE_GET_FLASH_FAULT		0x0E
+
+/* Greybus Light modes */
+
+/*
+ * if you add any specific mode below, update also the
+ * GB_CHANNEL_MODE_DEFINED_RANGE value accordingly
+ */
+#define GB_CHANNEL_MODE_NONE		0x00000000
+#define GB_CHANNEL_MODE_BATTERY		0x00000001
+#define GB_CHANNEL_MODE_POWER		0x00000002
+#define GB_CHANNEL_MODE_WIRELESS	0x00000004
+#define GB_CHANNEL_MODE_BLUETOOTH	0x00000008
+#define GB_CHANNEL_MODE_KEYBOARD	0x00000010
+#define GB_CHANNEL_MODE_BUTTONS		0x00000020
+#define GB_CHANNEL_MODE_NOTIFICATION	0x00000040
+#define GB_CHANNEL_MODE_ATTENTION	0x00000080
+#define GB_CHANNEL_MODE_FLASH		0x00000100
+#define GB_CHANNEL_MODE_TORCH		0x00000200
+#define GB_CHANNEL_MODE_INDICATOR	0x00000400
+
+/* Lights Mode valid bit values */
+#define GB_CHANNEL_MODE_DEFINED_RANGE	0x000004FF
+#define GB_CHANNEL_MODE_VENDOR_RANGE	0x00F00000
+
+/* Greybus Light Channels Flags */
+#define GB_LIGHT_CHANNEL_MULTICOLOR	0x00000001
+#define GB_LIGHT_CHANNEL_FADER		0x00000002
+#define GB_LIGHT_CHANNEL_BLINK		0x00000004
+
+/* get count of lights in module */
+struct gb_lights_get_lights_response {
+	__u8	lights_count;
+} __packed;
+
+/* light config request payload */
+struct gb_lights_get_light_config_request {
+	__u8	id;
+} __packed;
+
+/* light config response payload */
+struct gb_lights_get_light_config_response {
+	__u8	channel_count;
+	__u8	name[32];
+} __packed;
+
+/* channel config request payload */
+struct gb_lights_get_channel_config_request {
+	__u8	light_id;
+	__u8	channel_id;
+} __packed;
+
+/* channel flash config request payload */
+struct gb_lights_get_channel_flash_config_request {
+	__u8	light_id;
+	__u8	channel_id;
+} __packed;
+
+/* channel config response payload */
+struct gb_lights_get_channel_config_response {
+	__u8	max_brightness;
+	__le32	flags;
+	__le32	color;
+	__u8	color_name[32];
+	__le32	mode;
+	__u8	mode_name[32];
+} __packed;
+
+/* channel flash config response payload */
+struct gb_lights_get_channel_flash_config_response {
+	__le32	intensity_min_uA;
+	__le32	intensity_max_uA;
+	__le32	intensity_step_uA;
+	__le32	timeout_min_us;
+	__le32	timeout_max_us;
+	__le32	timeout_step_us;
+} __packed;
+
+/* blink request payload: response have no payload */
+struct gb_lights_blink_request {
+	__u8	light_id;
+	__u8	channel_id;
+	__le16	time_on_ms;
+	__le16	time_off_ms;
+} __packed;
+
+/* set brightness request payload: response have no payload */
+struct gb_lights_set_brightness_request {
+	__u8	light_id;
+	__u8	channel_id;
+	__u8	brightness;
+} __packed;
+
+/* set color request payload: response have no payload */
+struct gb_lights_set_color_request {
+	__u8	light_id;
+	__u8	channel_id;
+	__le32	color;
+} __packed;
+
+/* set fade request payload: response have no payload */
+struct gb_lights_set_fade_request {
+	__u8	light_id;
+	__u8	channel_id;
+	__u8	fade_in;
+	__u8	fade_out;
+} __packed;
+
+/* event request: generated by module */
+struct gb_lights_event_request {
+	__u8	light_id;
+	__u8	event;
+#define GB_LIGHTS_LIGHT_CONFIG		0x01
+} __packed;
+
+/* set flash intensity request payload: response have no payload */
+struct gb_lights_set_flash_intensity_request {
+	__u8	light_id;
+	__u8	channel_id;
+	__le32	intensity_uA;
+} __packed;
+
+/* set flash strobe state request payload: response have no payload */
+struct gb_lights_set_flash_strobe_request {
+	__u8	light_id;
+	__u8	channel_id;
+	__u8	state;
+} __packed;
+
+/* set flash timeout request payload: response have no payload */
+struct gb_lights_set_flash_timeout_request {
+	__u8	light_id;
+	__u8	channel_id;
+	__le32	timeout_us;
+} __packed;
+
+/* get flash fault request payload */
+struct gb_lights_get_flash_fault_request {
+	__u8	light_id;
+	__u8	channel_id;
+} __packed;
+
+/* get flash fault response payload */
+struct gb_lights_get_flash_fault_response {
+	__le32	fault;
+#define GB_LIGHTS_FLASH_FAULT_OVER_VOLTAGE		0x00000000
+#define GB_LIGHTS_FLASH_FAULT_TIMEOUT			0x00000001
+#define GB_LIGHTS_FLASH_FAULT_OVER_TEMPERATURE		0x00000002
+#define GB_LIGHTS_FLASH_FAULT_SHORT_CIRCUIT		0x00000004
+#define GB_LIGHTS_FLASH_FAULT_OVER_CURRENT		0x00000008
+#define GB_LIGHTS_FLASH_FAULT_INDICATOR			0x00000010
+#define GB_LIGHTS_FLASH_FAULT_UNDER_VOLTAGE		0x00000020
+#define GB_LIGHTS_FLASH_FAULT_INPUT_VOLTAGE		0x00000040
+#define GB_LIGHTS_FLASH_FAULT_LED_OVER_TEMPERATURE	0x00000080
+} __packed;
+
+/* Audio */
+
+#define GB_AUDIO_TYPE_GET_TOPOLOGY_SIZE		0x02
+#define GB_AUDIO_TYPE_GET_TOPOLOGY		0x03
+#define GB_AUDIO_TYPE_GET_CONTROL		0x04
+#define GB_AUDIO_TYPE_SET_CONTROL		0x05
+#define GB_AUDIO_TYPE_ENABLE_WIDGET		0x06
+#define GB_AUDIO_TYPE_DISABLE_WIDGET		0x07
+#define GB_AUDIO_TYPE_GET_PCM			0x08
+#define GB_AUDIO_TYPE_SET_PCM			0x09
+#define GB_AUDIO_TYPE_SET_TX_DATA_SIZE		0x0a
+						/* 0x0b unused */
+#define GB_AUDIO_TYPE_ACTIVATE_TX		0x0c
+#define GB_AUDIO_TYPE_DEACTIVATE_TX		0x0d
+#define GB_AUDIO_TYPE_SET_RX_DATA_SIZE		0x0e
+						/* 0x0f unused */
+#define GB_AUDIO_TYPE_ACTIVATE_RX		0x10
+#define GB_AUDIO_TYPE_DEACTIVATE_RX		0x11
+#define GB_AUDIO_TYPE_JACK_EVENT		0x12
+#define GB_AUDIO_TYPE_BUTTON_EVENT		0x13
+#define GB_AUDIO_TYPE_STREAMING_EVENT		0x14
+#define GB_AUDIO_TYPE_SEND_DATA			0x15
+
+/* Module must be able to buffer 10ms of audio data, minimum */
+#define GB_AUDIO_SAMPLE_BUFFER_MIN_US		10000
+
+#define GB_AUDIO_PCM_NAME_MAX			32
+#define AUDIO_DAI_NAME_MAX			32
+#define AUDIO_CONTROL_NAME_MAX			32
+#define AUDIO_CTL_ELEM_NAME_MAX			44
+#define AUDIO_ENUM_NAME_MAX			64
+#define AUDIO_WIDGET_NAME_MAX			32
+
+/* See SNDRV_PCM_FMTBIT_* in Linux source */
+#define GB_AUDIO_PCM_FMT_S8			BIT(0)
+#define GB_AUDIO_PCM_FMT_U8			BIT(1)
+#define GB_AUDIO_PCM_FMT_S16_LE			BIT(2)
+#define GB_AUDIO_PCM_FMT_S16_BE			BIT(3)
+#define GB_AUDIO_PCM_FMT_U16_LE			BIT(4)
+#define GB_AUDIO_PCM_FMT_U16_BE			BIT(5)
+#define GB_AUDIO_PCM_FMT_S24_LE			BIT(6)
+#define GB_AUDIO_PCM_FMT_S24_BE			BIT(7)
+#define GB_AUDIO_PCM_FMT_U24_LE			BIT(8)
+#define GB_AUDIO_PCM_FMT_U24_BE			BIT(9)
+#define GB_AUDIO_PCM_FMT_S32_LE			BIT(10)
+#define GB_AUDIO_PCM_FMT_S32_BE			BIT(11)
+#define GB_AUDIO_PCM_FMT_U32_LE			BIT(12)
+#define GB_AUDIO_PCM_FMT_U32_BE			BIT(13)
+
+/* See SNDRV_PCM_RATE_* in Linux source */
+#define GB_AUDIO_PCM_RATE_5512			BIT(0)
+#define GB_AUDIO_PCM_RATE_8000			BIT(1)
+#define GB_AUDIO_PCM_RATE_11025			BIT(2)
+#define GB_AUDIO_PCM_RATE_16000			BIT(3)
+#define GB_AUDIO_PCM_RATE_22050			BIT(4)
+#define GB_AUDIO_PCM_RATE_32000			BIT(5)
+#define GB_AUDIO_PCM_RATE_44100			BIT(6)
+#define GB_AUDIO_PCM_RATE_48000			BIT(7)
+#define GB_AUDIO_PCM_RATE_64000			BIT(8)
+#define GB_AUDIO_PCM_RATE_88200			BIT(9)
+#define GB_AUDIO_PCM_RATE_96000			BIT(10)
+#define GB_AUDIO_PCM_RATE_176400		BIT(11)
+#define GB_AUDIO_PCM_RATE_192000		BIT(12)
+
+#define GB_AUDIO_STREAM_TYPE_CAPTURE		0x1
+#define GB_AUDIO_STREAM_TYPE_PLAYBACK		0x2
+
+#define GB_AUDIO_CTL_ELEM_ACCESS_READ		BIT(0)
+#define GB_AUDIO_CTL_ELEM_ACCESS_WRITE		BIT(1)
+
+/* See SNDRV_CTL_ELEM_TYPE_* in Linux source */
+#define GB_AUDIO_CTL_ELEM_TYPE_BOOLEAN		0x01
+#define GB_AUDIO_CTL_ELEM_TYPE_INTEGER		0x02
+#define GB_AUDIO_CTL_ELEM_TYPE_ENUMERATED	0x03
+#define GB_AUDIO_CTL_ELEM_TYPE_INTEGER64	0x06
+
+/* See SNDRV_CTL_ELEM_IFACE_* in Linux source */
+#define GB_AUDIO_CTL_ELEM_IFACE_CARD		0x00
+#define GB_AUDIO_CTL_ELEM_IFACE_HWDEP		0x01
+#define GB_AUDIO_CTL_ELEM_IFACE_MIXER		0x02
+#define GB_AUDIO_CTL_ELEM_IFACE_PCM		0x03
+#define GB_AUDIO_CTL_ELEM_IFACE_RAWMIDI		0x04
+#define GB_AUDIO_CTL_ELEM_IFACE_TIMER		0x05
+#define GB_AUDIO_CTL_ELEM_IFACE_SEQUENCER	0x06
+
+/* SNDRV_CTL_ELEM_ACCESS_* in Linux source */
+#define GB_AUDIO_ACCESS_READ			BIT(0)
+#define GB_AUDIO_ACCESS_WRITE			BIT(1)
+#define GB_AUDIO_ACCESS_VOLATILE		BIT(2)
+#define GB_AUDIO_ACCESS_TIMESTAMP		BIT(3)
+#define GB_AUDIO_ACCESS_TLV_READ		BIT(4)
+#define GB_AUDIO_ACCESS_TLV_WRITE		BIT(5)
+#define GB_AUDIO_ACCESS_TLV_COMMAND		BIT(6)
+#define GB_AUDIO_ACCESS_INACTIVE		BIT(7)
+#define GB_AUDIO_ACCESS_LOCK			BIT(8)
+#define GB_AUDIO_ACCESS_OWNER			BIT(9)
+
+/* enum snd_soc_dapm_type */
+#define GB_AUDIO_WIDGET_TYPE_INPUT		0x0
+#define GB_AUDIO_WIDGET_TYPE_OUTPUT		0x1
+#define GB_AUDIO_WIDGET_TYPE_MUX		0x2
+#define GB_AUDIO_WIDGET_TYPE_VIRT_MUX		0x3
+#define GB_AUDIO_WIDGET_TYPE_VALUE_MUX		0x4
+#define GB_AUDIO_WIDGET_TYPE_MIXER		0x5
+#define GB_AUDIO_WIDGET_TYPE_MIXER_NAMED_CTL	0x6
+#define GB_AUDIO_WIDGET_TYPE_PGA		0x7
+#define GB_AUDIO_WIDGET_TYPE_OUT_DRV		0x8
+#define GB_AUDIO_WIDGET_TYPE_ADC		0x9
+#define GB_AUDIO_WIDGET_TYPE_DAC		0xa
+#define GB_AUDIO_WIDGET_TYPE_MICBIAS		0xb
+#define GB_AUDIO_WIDGET_TYPE_MIC		0xc
+#define GB_AUDIO_WIDGET_TYPE_HP			0xd
+#define GB_AUDIO_WIDGET_TYPE_SPK		0xe
+#define GB_AUDIO_WIDGET_TYPE_LINE		0xf
+#define GB_AUDIO_WIDGET_TYPE_SWITCH		0x10
+#define GB_AUDIO_WIDGET_TYPE_VMID		0x11
+#define GB_AUDIO_WIDGET_TYPE_PRE		0x12
+#define GB_AUDIO_WIDGET_TYPE_POST		0x13
+#define GB_AUDIO_WIDGET_TYPE_SUPPLY		0x14
+#define GB_AUDIO_WIDGET_TYPE_REGULATOR_SUPPLY	0x15
+#define GB_AUDIO_WIDGET_TYPE_CLOCK_SUPPLY	0x16
+#define GB_AUDIO_WIDGET_TYPE_AIF_IN		0x17
+#define GB_AUDIO_WIDGET_TYPE_AIF_OUT		0x18
+#define GB_AUDIO_WIDGET_TYPE_SIGGEN		0x19
+#define GB_AUDIO_WIDGET_TYPE_DAI_IN		0x1a
+#define GB_AUDIO_WIDGET_TYPE_DAI_OUT		0x1b
+#define GB_AUDIO_WIDGET_TYPE_DAI_LINK		0x1c
+
+#define GB_AUDIO_WIDGET_STATE_DISABLED		0x01
+#define GB_AUDIO_WIDGET_STATE_ENAABLED		0x02
+
+#define GB_AUDIO_JACK_EVENT_INSERTION		0x1
+#define GB_AUDIO_JACK_EVENT_REMOVAL		0x2
+
+#define GB_AUDIO_BUTTON_EVENT_PRESS		0x1
+#define GB_AUDIO_BUTTON_EVENT_RELEASE		0x2
+
+#define GB_AUDIO_STREAMING_EVENT_UNSPECIFIED	0x1
+#define GB_AUDIO_STREAMING_EVENT_HALT		0x2
+#define GB_AUDIO_STREAMING_EVENT_INTERNAL_ERROR	0x3
+#define GB_AUDIO_STREAMING_EVENT_PROTOCOL_ERROR	0x4
+#define GB_AUDIO_STREAMING_EVENT_FAILURE	0x5
+#define GB_AUDIO_STREAMING_EVENT_UNDERRUN	0x6
+#define GB_AUDIO_STREAMING_EVENT_OVERRUN	0x7
+#define GB_AUDIO_STREAMING_EVENT_CLOCKING	0x8
+#define GB_AUDIO_STREAMING_EVENT_DATA_LEN	0x9
+
+#define GB_AUDIO_INVALID_INDEX			0xff
+
+/* enum snd_jack_types */
+#define GB_AUDIO_JACK_HEADPHONE			0x0000001
+#define GB_AUDIO_JACK_MICROPHONE		0x0000002
+#define GB_AUDIO_JACK_HEADSET			(GB_AUDIO_JACK_HEADPHONE | \
+						 GB_AUDIO_JACK_MICROPHONE)
+#define GB_AUDIO_JACK_LINEOUT			0x0000004
+#define GB_AUDIO_JACK_MECHANICAL		0x0000008
+#define GB_AUDIO_JACK_VIDEOOUT			0x0000010
+#define GB_AUDIO_JACK_AVOUT			(GB_AUDIO_JACK_LINEOUT | \
+						 GB_AUDIO_JACK_VIDEOOUT)
+#define GB_AUDIO_JACK_LINEIN			0x0000020
+#define GB_AUDIO_JACK_OC_HPHL			0x0000040
+#define GB_AUDIO_JACK_OC_HPHR			0x0000080
+#define GB_AUDIO_JACK_MICROPHONE2		0x0000200
+#define GB_AUDIO_JACK_ANC_HEADPHONE		(GB_AUDIO_JACK_HEADPHONE | \
+						 GB_AUDIO_JACK_MICROPHONE | \
+						 GB_AUDIO_JACK_MICROPHONE2)
+/* Kept separate from switches to facilitate implementation */
+#define GB_AUDIO_JACK_BTN_0			0x4000000
+#define GB_AUDIO_JACK_BTN_1			0x2000000
+#define GB_AUDIO_JACK_BTN_2			0x1000000
+#define GB_AUDIO_JACK_BTN_3			0x0800000
+
+struct gb_audio_pcm {
+	__u8	stream_name[GB_AUDIO_PCM_NAME_MAX];
+	__le32	formats;	/* GB_AUDIO_PCM_FMT_* */
+	__le32	rates;		/* GB_AUDIO_PCM_RATE_* */
+	__u8	chan_min;
+	__u8	chan_max;
+	__u8	sig_bits;	/* number of bits of content */
+} __packed;
+
+struct gb_audio_dai {
+	__u8			name[AUDIO_DAI_NAME_MAX];
+	__le16			data_cport;
+	struct gb_audio_pcm	capture;
+	struct gb_audio_pcm	playback;
+} __packed;
+
+struct gb_audio_integer {
+	__le32	min;
+	__le32	max;
+	__le32	step;
+} __packed;
+
+struct gb_audio_integer64 {
+	__le64	min;
+	__le64	max;
+	__le64	step;
+} __packed;
+
+struct gb_audio_enumerated {
+	__le32	items;
+	__le16	names_length;
+	__u8	names[0];
+} __packed;
+
+struct gb_audio_ctl_elem_info { /* See snd_ctl_elem_info in Linux source */
+	__u8		type;		/* GB_AUDIO_CTL_ELEM_TYPE_* */
+	__le16		dimen[4];
+	union {
+		struct gb_audio_integer		integer;
+		struct gb_audio_integer64	integer64;
+		struct gb_audio_enumerated	enumerated;
+	} value;
+} __packed;
+
+struct gb_audio_ctl_elem_value { /* See snd_ctl_elem_value in Linux source */
+	__le64				timestamp; /* XXX needed? */
+	union {
+		__le32	integer_value[2];	/* consider CTL_DOUBLE_xxx */
+		__le64	integer64_value[2];
+		__le32	enumerated_item[2];
+	} value;
+} __packed;
+
+struct gb_audio_control {
+	__u8	name[AUDIO_CONTROL_NAME_MAX];
+	__u8	id;		/* 0-63 */
+	__u8	iface;		/* GB_AUDIO_IFACE_* */
+	__le16	data_cport;
+	__le32	access;		/* GB_AUDIO_ACCESS_* */
+	__u8    count;		/* count of same elements */
+	__u8	count_values;	/* count of values, max=2 for CTL_DOUBLE_xxx */
+	struct gb_audio_ctl_elem_info	info;
+} __packed;
+
+struct gb_audio_widget {
+	__u8	name[AUDIO_WIDGET_NAME_MAX];
+	__u8	sname[AUDIO_WIDGET_NAME_MAX];
+	__u8	id;
+	__u8	type;		/* GB_AUDIO_WIDGET_TYPE_* */
+	__u8	state;		/* GB_AUDIO_WIDGET_STATE_* */
+	__u8	ncontrols;
+	struct gb_audio_control	ctl[0];	/* 'ncontrols' entries */
+} __packed;
+
+struct gb_audio_route {
+	__u8	source_id;	/* widget id */
+	__u8	destination_id;	/* widget id */
+	__u8	control_id;	/* 0-63 */
+	__u8	index;		/* Selection within the control */
+} __packed;
+
+struct gb_audio_topology {
+	__u8	num_dais;
+	__u8	num_controls;
+	__u8	num_widgets;
+	__u8	num_routes;
+	__le32	size_dais;
+	__le32	size_controls;
+	__le32	size_widgets;
+	__le32	size_routes;
+	__le32	jack_type;
+	/*
+	 * struct gb_audio_dai		dai[num_dais];
+	 * struct gb_audio_control	controls[num_controls];
+	 * struct gb_audio_widget	widgets[num_widgets];
+	 * struct gb_audio_route	routes[num_routes];
+	 */
+	__u8	data[0];
+} __packed;
+
+struct gb_audio_get_topology_size_response {
+	__le16	size;
+} __packed;
+
+struct gb_audio_get_topology_response {
+	struct gb_audio_topology	topology;
+} __packed;
+
+struct gb_audio_get_control_request {
+	__u8	control_id;
+	__u8	index;
+} __packed;
+
+struct gb_audio_get_control_response {
+	struct gb_audio_ctl_elem_value	value;
+} __packed;
+
+struct gb_audio_set_control_request {
+	__u8	control_id;
+	__u8	index;
+	struct gb_audio_ctl_elem_value	value;
+} __packed;
+
+struct gb_audio_enable_widget_request {
+	__u8	widget_id;
+} __packed;
+
+struct gb_audio_disable_widget_request {
+	__u8	widget_id;
+} __packed;
+
+struct gb_audio_get_pcm_request {
+	__le16	data_cport;
+} __packed;
+
+struct gb_audio_get_pcm_response {
+	__le32	format;
+	__le32	rate;
+	__u8	channels;
+	__u8	sig_bits;
+} __packed;
+
+struct gb_audio_set_pcm_request {
+	__le16	data_cport;
+	__le32	format;
+	__le32	rate;
+	__u8	channels;
+	__u8	sig_bits;
+} __packed;
+
+struct gb_audio_set_tx_data_size_request {
+	__le16	data_cport;
+	__le16	size;
+} __packed;
+
+struct gb_audio_activate_tx_request {
+	__le16	data_cport;
+} __packed;
+
+struct gb_audio_deactivate_tx_request {
+	__le16	data_cport;
+} __packed;
+
+struct gb_audio_set_rx_data_size_request {
+	__le16	data_cport;
+	__le16	size;
+} __packed;
+
+struct gb_audio_activate_rx_request {
+	__le16	data_cport;
+} __packed;
+
+struct gb_audio_deactivate_rx_request {
+	__le16	data_cport;
+} __packed;
+
+struct gb_audio_jack_event_request {
+	__u8	widget_id;
+	__u8	jack_attribute;
+	__u8	event;
+} __packed;
+
+struct gb_audio_button_event_request {
+	__u8	widget_id;
+	__u8	button_id;
+	__u8	event;
+} __packed;
+
+struct gb_audio_streaming_event_request {
+	__le16	data_cport;
+	__u8	event;
+} __packed;
+
+struct gb_audio_send_data_request {
+	__le64	timestamp;
+	__u8	data[0];
+} __packed;
+
+
+/* Log */
+
+/* operations */
+#define GB_LOG_TYPE_SEND_LOG	0x02
+
+/* length */
+#define GB_LOG_MAX_LEN		1024
+
+struct gb_log_send_log_request {
+	__le16	len;
+	__u8    msg[0];
+} __packed;
+
+#endif /* __GREYBUS_PROTOCOLS_H */
+
diff --git a/include/linux/greybus/hd.h b/include/linux/greybus/hd.h
new file mode 100644
index 000000000000..348b76fabc9a
--- /dev/null
+++ b/include/linux/greybus/hd.h
@@ -0,0 +1,82 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Greybus Host Device
+ *
+ * Copyright 2014-2015 Google Inc.
+ * Copyright 2014-2015 Linaro Ltd.
+ */
+
+#ifndef __HD_H
+#define __HD_H
+
+struct gb_host_device;
+struct gb_message;
+
+struct gb_hd_driver {
+	size_t	hd_priv_size;
+
+	int (*cport_allocate)(struct gb_host_device *hd, int cport_id,
+				unsigned long flags);
+	void (*cport_release)(struct gb_host_device *hd, u16 cport_id);
+	int (*cport_enable)(struct gb_host_device *hd, u16 cport_id,
+				unsigned long flags);
+	int (*cport_disable)(struct gb_host_device *hd, u16 cport_id);
+	int (*cport_connected)(struct gb_host_device *hd, u16 cport_id);
+	int (*cport_flush)(struct gb_host_device *hd, u16 cport_id);
+	int (*cport_shutdown)(struct gb_host_device *hd, u16 cport_id,
+				u8 phase, unsigned int timeout);
+	int (*cport_quiesce)(struct gb_host_device *hd, u16 cport_id,
+				size_t peer_space, unsigned int timeout);
+	int (*cport_clear)(struct gb_host_device *hd, u16 cport_id);
+
+	int (*message_send)(struct gb_host_device *hd, u16 dest_cport_id,
+			struct gb_message *message, gfp_t gfp_mask);
+	void (*message_cancel)(struct gb_message *message);
+	int (*latency_tag_enable)(struct gb_host_device *hd, u16 cport_id);
+	int (*latency_tag_disable)(struct gb_host_device *hd, u16 cport_id);
+	int (*output)(struct gb_host_device *hd, void *req, u16 size, u8 cmd,
+		      bool async);
+};
+
+struct gb_host_device {
+	struct device dev;
+	int bus_id;
+	const struct gb_hd_driver *driver;
+
+	struct list_head modules;
+	struct list_head connections;
+	struct ida cport_id_map;
+
+	/* Number of CPorts supported by the UniPro IP */
+	size_t num_cports;
+
+	/* Host device buffer constraints */
+	size_t buffer_size_max;
+
+	struct gb_svc *svc;
+	/* Private data for the host driver */
+	unsigned long hd_priv[0] __aligned(sizeof(s64));
+};
+#define to_gb_host_device(d) container_of(d, struct gb_host_device, dev)
+
+int gb_hd_cport_reserve(struct gb_host_device *hd, u16 cport_id);
+void gb_hd_cport_release_reserved(struct gb_host_device *hd, u16 cport_id);
+int gb_hd_cport_allocate(struct gb_host_device *hd, int cport_id,
+					unsigned long flags);
+void gb_hd_cport_release(struct gb_host_device *hd, u16 cport_id);
+
+struct gb_host_device *gb_hd_create(struct gb_hd_driver *driver,
+					struct device *parent,
+					size_t buffer_size_max,
+					size_t num_cports);
+int gb_hd_add(struct gb_host_device *hd);
+void gb_hd_del(struct gb_host_device *hd);
+void gb_hd_shutdown(struct gb_host_device *hd);
+void gb_hd_put(struct gb_host_device *hd);
+int gb_hd_output(struct gb_host_device *hd, void *req, u16 size, u8 cmd,
+		 bool in_irq);
+
+int gb_hd_init(void);
+void gb_hd_exit(void);
+
+#endif	/* __HD_H */
diff --git a/include/linux/greybus/interface.h b/include/linux/greybus/interface.h
new file mode 100644
index 000000000000..8fb1eacda302
--- /dev/null
+++ b/include/linux/greybus/interface.h
@@ -0,0 +1,82 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Greybus Interface Block code
+ *
+ * Copyright 2014 Google Inc.
+ * Copyright 2014 Linaro Ltd.
+ */
+
+#ifndef __INTERFACE_H
+#define __INTERFACE_H
+
+enum gb_interface_type {
+	GB_INTERFACE_TYPE_INVALID = 0,
+	GB_INTERFACE_TYPE_UNKNOWN,
+	GB_INTERFACE_TYPE_DUMMY,
+	GB_INTERFACE_TYPE_UNIPRO,
+	GB_INTERFACE_TYPE_GREYBUS,
+};
+
+#define GB_INTERFACE_QUIRK_NO_CPORT_FEATURES		BIT(0)
+#define GB_INTERFACE_QUIRK_NO_INIT_STATUS		BIT(1)
+#define GB_INTERFACE_QUIRK_NO_GMP_IDS			BIT(2)
+#define GB_INTERFACE_QUIRK_FORCED_DISABLE		BIT(3)
+#define GB_INTERFACE_QUIRK_LEGACY_MODE_SWITCH		BIT(4)
+#define GB_INTERFACE_QUIRK_NO_BUNDLE_ACTIVATE		BIT(5)
+#define GB_INTERFACE_QUIRK_NO_PM			BIT(6)
+
+struct gb_interface {
+	struct device dev;
+	struct gb_control *control;
+
+	struct list_head bundles;
+	struct list_head module_node;
+	struct list_head manifest_descs;
+	u8 interface_id;	/* Physical location within the Endo */
+	u8 device_id;
+	u8 features;		/* Feature flags set in the manifest */
+
+	enum gb_interface_type type;
+
+	u32 ddbl1_manufacturer_id;
+	u32 ddbl1_product_id;
+	u32 vendor_id;
+	u32 product_id;
+	u64 serial_number;
+
+	struct gb_host_device *hd;
+	struct gb_module *module;
+
+	unsigned long quirks;
+
+	struct mutex mutex;
+
+	bool disconnected;
+
+	bool ejected;
+	bool removed;
+	bool active;
+	bool enabled;
+	bool mode_switch;
+	bool dme_read;
+
+	struct work_struct mode_switch_work;
+	struct completion mode_switch_completion;
+};
+#define to_gb_interface(d) container_of(d, struct gb_interface, dev)
+
+struct gb_interface *gb_interface_create(struct gb_module *module,
+					 u8 interface_id);
+int gb_interface_activate(struct gb_interface *intf);
+void gb_interface_deactivate(struct gb_interface *intf);
+int gb_interface_enable(struct gb_interface *intf);
+void gb_interface_disable(struct gb_interface *intf);
+int gb_interface_add(struct gb_interface *intf);
+void gb_interface_del(struct gb_interface *intf);
+void gb_interface_put(struct gb_interface *intf);
+void gb_interface_mailbox_event(struct gb_interface *intf, u16 result,
+								u32 mailbox);
+
+int gb_interface_request_mode_switch(struct gb_interface *intf);
+
+#endif /* __INTERFACE_H */
diff --git a/include/linux/greybus/manifest.h b/include/linux/greybus/manifest.h
new file mode 100644
index 000000000000..88aa7e44cad5
--- /dev/null
+++ b/include/linux/greybus/manifest.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Greybus manifest parsing
+ *
+ * Copyright 2014 Google Inc.
+ * Copyright 2014 Linaro Ltd.
+ */
+
+#ifndef __MANIFEST_H
+#define __MANIFEST_H
+
+struct gb_interface;
+bool gb_manifest_parse(struct gb_interface *intf, void *data, size_t size);
+
+#endif /* __MANIFEST_H */
diff --git a/include/linux/greybus/module.h b/include/linux/greybus/module.h
new file mode 100644
index 000000000000..2a27e520ee94
--- /dev/null
+++ b/include/linux/greybus/module.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Greybus Module code
+ *
+ * Copyright 2016 Google Inc.
+ * Copyright 2016 Linaro Ltd.
+ */
+
+#ifndef __MODULE_H
+#define __MODULE_H
+
+struct gb_module {
+	struct device dev;
+	struct gb_host_device *hd;
+
+	struct list_head hd_node;
+
+	u8 module_id;
+	size_t num_interfaces;
+
+	bool disconnected;
+
+	struct gb_interface *interfaces[0];
+};
+#define to_gb_module(d) container_of(d, struct gb_module, dev)
+
+struct gb_module *gb_module_create(struct gb_host_device *hd, u8 module_id,
+				   size_t num_interfaces);
+int gb_module_add(struct gb_module *module);
+void gb_module_del(struct gb_module *module);
+void gb_module_put(struct gb_module *module);
+
+#endif /* __MODULE_H */
diff --git a/include/linux/greybus/operation.h b/include/linux/greybus/operation.h
new file mode 100644
index 000000000000..17ba3daf111b
--- /dev/null
+++ b/include/linux/greybus/operation.h
@@ -0,0 +1,224 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Greybus operations
+ *
+ * Copyright 2014 Google Inc.
+ * Copyright 2014 Linaro Ltd.
+ */
+
+#ifndef __OPERATION_H
+#define __OPERATION_H
+
+#include <linux/completion.h>
+
+struct gb_operation;
+
+/* The default amount of time a request is given to complete */
+#define GB_OPERATION_TIMEOUT_DEFAULT	1000	/* milliseconds */
+
+/*
+ * The top bit of the type in an operation message header indicates
+ * whether the message is a request (bit clear) or response (bit set)
+ */
+#define GB_MESSAGE_TYPE_RESPONSE	((u8)0x80)
+
+enum gb_operation_result {
+	GB_OP_SUCCESS		= 0x00,
+	GB_OP_INTERRUPTED	= 0x01,
+	GB_OP_TIMEOUT		= 0x02,
+	GB_OP_NO_MEMORY		= 0x03,
+	GB_OP_PROTOCOL_BAD	= 0x04,
+	GB_OP_OVERFLOW		= 0x05,
+	GB_OP_INVALID		= 0x06,
+	GB_OP_RETRY		= 0x07,
+	GB_OP_NONEXISTENT	= 0x08,
+	GB_OP_UNKNOWN_ERROR	= 0xfe,
+	GB_OP_MALFUNCTION	= 0xff,
+};
+
+#define GB_OPERATION_MESSAGE_SIZE_MIN	sizeof(struct gb_operation_msg_hdr)
+#define GB_OPERATION_MESSAGE_SIZE_MAX	U16_MAX
+
+/*
+ * Protocol code should only examine the payload and payload_size fields, and
+ * host-controller drivers may use the hcpriv field. All other fields are
+ * intended to be private to the operations core code.
+ */
+struct gb_message {
+	struct gb_operation		*operation;
+	struct gb_operation_msg_hdr	*header;
+
+	void				*payload;
+	size_t				payload_size;
+
+	void				*buffer;
+
+	void				*hcpriv;
+};
+
+#define GB_OPERATION_FLAG_INCOMING		BIT(0)
+#define GB_OPERATION_FLAG_UNIDIRECTIONAL	BIT(1)
+#define GB_OPERATION_FLAG_SHORT_RESPONSE	BIT(2)
+#define GB_OPERATION_FLAG_CORE			BIT(3)
+
+#define GB_OPERATION_FLAG_USER_MASK	(GB_OPERATION_FLAG_SHORT_RESPONSE | \
+					 GB_OPERATION_FLAG_UNIDIRECTIONAL)
+
+/*
+ * A Greybus operation is a remote procedure call performed over a
+ * connection between two UniPro interfaces.
+ *
+ * Every operation consists of a request message sent to the other
+ * end of the connection coupled with a reply message returned to
+ * the sender.  Every operation has a type, whose interpretation is
+ * dependent on the protocol associated with the connection.
+ *
+ * Only four things in an operation structure are intended to be
+ * directly usable by protocol handlers:  the operation's connection
+ * pointer; the operation type; the request message payload (and
+ * size); and the response message payload (and size).  Note that a
+ * message with a 0-byte payload has a null message payload pointer.
+ *
+ * In addition, every operation has a result, which is an errno
+ * value.  Protocol handlers access the operation result using
+ * gb_operation_result().
+ */
+typedef void (*gb_operation_callback)(struct gb_operation *);
+struct gb_operation {
+	struct gb_connection	*connection;
+	struct gb_message	*request;
+	struct gb_message	*response;
+
+	unsigned long		flags;
+	u8			type;
+	u16			id;
+	int			errno;		/* Operation result */
+
+	struct work_struct	work;
+	gb_operation_callback	callback;
+	struct completion	completion;
+	struct timer_list	timer;
+
+	struct kref		kref;
+	atomic_t		waiters;
+
+	int			active;
+	struct list_head	links;		/* connection->operations */
+
+	void			*private;
+};
+
+static inline bool
+gb_operation_is_incoming(struct gb_operation *operation)
+{
+	return operation->flags & GB_OPERATION_FLAG_INCOMING;
+}
+
+static inline bool
+gb_operation_is_unidirectional(struct gb_operation *operation)
+{
+	return operation->flags & GB_OPERATION_FLAG_UNIDIRECTIONAL;
+}
+
+static inline bool
+gb_operation_short_response_allowed(struct gb_operation *operation)
+{
+	return operation->flags & GB_OPERATION_FLAG_SHORT_RESPONSE;
+}
+
+static inline bool gb_operation_is_core(struct gb_operation *operation)
+{
+	return operation->flags & GB_OPERATION_FLAG_CORE;
+}
+
+void gb_connection_recv(struct gb_connection *connection,
+					void *data, size_t size);
+
+int gb_operation_result(struct gb_operation *operation);
+
+size_t gb_operation_get_payload_size_max(struct gb_connection *connection);
+struct gb_operation *
+gb_operation_create_flags(struct gb_connection *connection,
+				u8 type, size_t request_size,
+				size_t response_size, unsigned long flags,
+				gfp_t gfp);
+
+static inline struct gb_operation *
+gb_operation_create(struct gb_connection *connection,
+				u8 type, size_t request_size,
+				size_t response_size, gfp_t gfp)
+{
+	return gb_operation_create_flags(connection, type, request_size,
+						response_size, 0, gfp);
+}
+
+struct gb_operation *
+gb_operation_create_core(struct gb_connection *connection,
+				u8 type, size_t request_size,
+				size_t response_size, unsigned long flags,
+				gfp_t gfp);
+
+void gb_operation_get(struct gb_operation *operation);
+void gb_operation_put(struct gb_operation *operation);
+
+bool gb_operation_response_alloc(struct gb_operation *operation,
+					size_t response_size, gfp_t gfp);
+
+int gb_operation_request_send(struct gb_operation *operation,
+				gb_operation_callback callback,
+				unsigned int timeout,
+				gfp_t gfp);
+int gb_operation_request_send_sync_timeout(struct gb_operation *operation,
+						unsigned int timeout);
+static inline int
+gb_operation_request_send_sync(struct gb_operation *operation)
+{
+	return gb_operation_request_send_sync_timeout(operation,
+			GB_OPERATION_TIMEOUT_DEFAULT);
+}
+
+void gb_operation_cancel(struct gb_operation *operation, int errno);
+void gb_operation_cancel_incoming(struct gb_operation *operation, int errno);
+
+void greybus_message_sent(struct gb_host_device *hd,
+				struct gb_message *message, int status);
+
+int gb_operation_sync_timeout(struct gb_connection *connection, int type,
+				void *request, int request_size,
+				void *response, int response_size,
+				unsigned int timeout);
+int gb_operation_unidirectional_timeout(struct gb_connection *connection,
+				int type, void *request, int request_size,
+				unsigned int timeout);
+
+static inline int gb_operation_sync(struct gb_connection *connection, int type,
+		      void *request, int request_size,
+		      void *response, int response_size)
+{
+	return gb_operation_sync_timeout(connection, type,
+			request, request_size, response, response_size,
+			GB_OPERATION_TIMEOUT_DEFAULT);
+}
+
+static inline int gb_operation_unidirectional(struct gb_connection *connection,
+				int type, void *request, int request_size)
+{
+	return gb_operation_unidirectional_timeout(connection, type,
+			request, request_size, GB_OPERATION_TIMEOUT_DEFAULT);
+}
+
+static inline void *gb_operation_get_data(struct gb_operation *operation)
+{
+	return operation->private;
+}
+
+static inline void gb_operation_set_data(struct gb_operation *operation,
+					 void *data)
+{
+	operation->private = data;
+}
+
+int gb_operation_init(void);
+void gb_operation_exit(void);
+
+#endif /* !__OPERATION_H */
diff --git a/include/linux/greybus/svc.h b/include/linux/greybus/svc.h
new file mode 100644
index 000000000000..e7452057cfe4
--- /dev/null
+++ b/include/linux/greybus/svc.h
@@ -0,0 +1,101 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Greybus SVC code
+ *
+ * Copyright 2015 Google Inc.
+ * Copyright 2015 Linaro Ltd.
+ */
+
+#ifndef __SVC_H
+#define __SVC_H
+
+#define GB_SVC_CPORT_FLAG_E2EFC		BIT(0)
+#define GB_SVC_CPORT_FLAG_CSD_N		BIT(1)
+#define GB_SVC_CPORT_FLAG_CSV_N		BIT(2)
+
+enum gb_svc_state {
+	GB_SVC_STATE_RESET,
+	GB_SVC_STATE_PROTOCOL_VERSION,
+	GB_SVC_STATE_SVC_HELLO,
+};
+
+enum gb_svc_watchdog_bite {
+	GB_SVC_WATCHDOG_BITE_RESET_UNIPRO = 0,
+	GB_SVC_WATCHDOG_BITE_PANIC_KERNEL,
+};
+
+struct gb_svc_watchdog;
+
+struct svc_debugfs_pwrmon_rail {
+	u8 id;
+	struct gb_svc *svc;
+};
+
+struct gb_svc {
+	struct device		dev;
+
+	struct gb_host_device	*hd;
+	struct gb_connection	*connection;
+	enum gb_svc_state	state;
+	struct ida		device_id_map;
+	struct workqueue_struct	*wq;
+
+	u16 endo_id;
+	u8 ap_intf_id;
+
+	u8 protocol_major;
+	u8 protocol_minor;
+
+	struct gb_svc_watchdog	*watchdog;
+	enum gb_svc_watchdog_bite action;
+
+	struct dentry *debugfs_dentry;
+	struct svc_debugfs_pwrmon_rail *pwrmon_rails;
+};
+#define to_gb_svc(d) container_of(d, struct gb_svc, dev)
+
+struct gb_svc *gb_svc_create(struct gb_host_device *hd);
+int gb_svc_add(struct gb_svc *svc);
+void gb_svc_del(struct gb_svc *svc);
+void gb_svc_put(struct gb_svc *svc);
+
+int gb_svc_pwrmon_intf_sample_get(struct gb_svc *svc, u8 intf_id,
+				  u8 measurement_type, u32 *value);
+int gb_svc_intf_device_id(struct gb_svc *svc, u8 intf_id, u8 device_id);
+int gb_svc_route_create(struct gb_svc *svc, u8 intf1_id, u8 dev1_id,
+			       u8 intf2_id, u8 dev2_id);
+void gb_svc_route_destroy(struct gb_svc *svc, u8 intf1_id, u8 intf2_id);
+int gb_svc_connection_create(struct gb_svc *svc, u8 intf1_id, u16 cport1_id,
+			     u8 intf2_id, u16 cport2_id, u8 cport_flags);
+void gb_svc_connection_destroy(struct gb_svc *svc, u8 intf1_id, u16 cport1_id,
+			       u8 intf2_id, u16 cport2_id);
+int gb_svc_intf_eject(struct gb_svc *svc, u8 intf_id);
+int gb_svc_intf_vsys_set(struct gb_svc *svc, u8 intf_id, bool enable);
+int gb_svc_intf_refclk_set(struct gb_svc *svc, u8 intf_id, bool enable);
+int gb_svc_intf_unipro_set(struct gb_svc *svc, u8 intf_id, bool enable);
+int gb_svc_intf_activate(struct gb_svc *svc, u8 intf_id, u8 *intf_type);
+int gb_svc_intf_resume(struct gb_svc *svc, u8 intf_id);
+
+int gb_svc_dme_peer_get(struct gb_svc *svc, u8 intf_id, u16 attr, u16 selector,
+			u32 *value);
+int gb_svc_dme_peer_set(struct gb_svc *svc, u8 intf_id, u16 attr, u16 selector,
+			u32 value);
+int gb_svc_intf_set_power_mode(struct gb_svc *svc, u8 intf_id, u8 hs_series,
+			       u8 tx_mode, u8 tx_gear, u8 tx_nlanes,
+			       u8 tx_amplitude, u8 tx_hs_equalizer,
+			       u8 rx_mode, u8 rx_gear, u8 rx_nlanes,
+			       u8 flags, u32 quirks,
+			       struct gb_svc_l2_timer_cfg *local,
+			       struct gb_svc_l2_timer_cfg *remote);
+int gb_svc_intf_set_power_mode_hibernate(struct gb_svc *svc, u8 intf_id);
+int gb_svc_ping(struct gb_svc *svc);
+int gb_svc_watchdog_create(struct gb_svc *svc);
+void gb_svc_watchdog_destroy(struct gb_svc *svc);
+bool gb_svc_watchdog_enabled(struct gb_svc *svc);
+int gb_svc_watchdog_enable(struct gb_svc *svc);
+int gb_svc_watchdog_disable(struct gb_svc *svc);
+
+int gb_svc_protocol_init(void);
+void gb_svc_protocol_exit(void);
+
+#endif /* __SVC_H */