/* 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
#include <linux/bits.h>
#include <linux/types.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[];
} __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[];
} __packed;
#endif /* __GREYBUS_MANIFEST_H */
Codebase Browser
linux