module openconfig-platform-transceiver {

    yang-version 1;

    namespace
      "http://openconfig.net/yang/platform/transceiver";

    prefix oc-transceiver;

    import ietf-yang-types {
      prefix yang;
    }
    import openconfig-platform {
      prefix oc-platform;
    }
    import openconfig-platform-types {
      prefix oc-platform-types;
    }
    import openconfig-platform-port {
      prefix oc-port;
    }
    import openconfig-interfaces {
      prefix oc-if;
    }
    import openconfig-transport-types {
      prefix oc-opt-types;
    }
    import openconfig-types {
      prefix oc-types;
    }
    import openconfig-extensions {
      prefix oc-ext;
    }
    import openconfig-yang-types {
      prefix oc-yang;
    }

    organization "OpenConfig working group";

    contact
      "OpenConfig working group
www.openconfig.net";

    description
      "This module defines configuration and operational state data
for transceivers (i.e., pluggable optics).  The module should be
used in conjunction with the platform model where other
physical entity data are represented.

In the platform model, a component of type=TRANSCEIVER is
expected to be a subcomponent of a PORT component.  This
module defines a concrete schema for the associated data for
components with type=TRANSCEIVER.

A transceiver will always contain physical-channel(s), however
when a line side optical-channel is present (i.e. ZR+ optics)
the physical-channel will reference its optical-channel.
In this case, the optical-channels components must be
subcomponents of the transceiver. The relationship between the
physical-channel and the optical-channel allows for multiple
optical-channels to be associated with a transceiver in addition
to ensuring certain leaves (i.e. output-power) are not duplicated
in multiple components.

If a transceiver contains a digital signal processor (DSP), such
as with ZR+ optics, the modeling will utilize hierarchical
components as follows:
PORT --> TRANSCEIVER --> OPTICAL_CHANNEL(s)
The signal will then traverse through a series of
terminal-device/logical-channels as required. The first
logical-channel connected to the OPTICAL_CHANNEL will utilize the
assignment/optical-channel leaf to create the relationship. At the
conclusion of the series of logical-channels, the logical-channel
will be associated to its host / client side based on:
* If the TRANSCEIVER is directly within a router or switch, then
 it will use the logical-channel ingress leaf to specify the
 interface it is associated with.
* If the TRANSCEIVER is within a dedicated terminal (Layer 1)
 device, then it will use the logical-channel ingress leaf to
 specify a physical-channel within a TRANSCEIVER component
 (i.e. gray optic) that it is associated with.";

    revision "2021-02-23" {
      description
        "Add leafref to an optical channel from a physical channel.";
      reference
        "0.8.0";

    }

    revision "2020-05-06" {
      description
        "Ensure that when statements in read-write contexts reference
only read-write leaves.";
      reference
        "0.7.1";

    }

    revision "2018-11-25" {
      description
        "Add augment for leafref to transceiver component;
Correct paths in physical channels leafref.";
      reference
        "0.7.0";

    }

    revision "2018-11-21" {
      description
        "Add OpenConfig module metadata extensions.";
      reference
        "0.6.1";

    }

    revision "2018-11-16" {
      description
        "Added transceiver FEC configuration and state";
      reference
        "0.6.0";

    }

    revision "2018-05-15" {
      description
        "Remove internal-temp state leaf, since we prefer
the generic /components/component/state/temperature
container for temperature information.";
      reference
        "0.5.0";

    }

    revision "2018-01-22" {
      description
        "Fixed physical-channel path reference";
      reference
        "0.4.1";

    }

    revision "2017-09-18" {
      description
        "Use openconfig-yang-types module";
      reference
        "0.4.0";

    }

    revision "2017-07-08" {
      description
        "Adds clarification on aggregate power measurement data";
      reference
        "0.3.0";

    }

    revision "2016-12-22" {
      description
        "Adds preconfiguration data and clarified units";
      reference
        "0.2.0";

    }

    oc-ext:openconfig-version "0.8.0";
    oc-ext:regexp-posix;
    oc-ext:catalog-organization "openconfig";
    oc-ext:origin "openconfig";

    grouping optical-power-state {
      description
        "Reusable leaves related to optical power state -- these
are read-only state values. If avg/min/max statistics are
not supported, the target is expected to just supply the
instant value";
      container output-power {
        description
          "The output optical power of a physical channel in units
of 0.01dBm, which may be associated with individual
physical channels, or an aggregate of multiple physical
channels (i.e., for the overall transceiver). For an
aggregate, this may be a measurement from a photodetector
or a a calculation performed on the device by summing up
all of the related individual physical channels.
Values include the instantaneous, average, minimum, and
maximum statistics. If avg/min/max statistics are not
supported, the target is expected to just supply the
instant value";
        uses oc-types:avg-min-max-instant-stats-precision2-dBm;
      }  // container output-power

      container input-power {
        description
          "The input optical power of a physical channel in units
of 0.01dBm, which may be associated with individual
physical channels, or an aggregate of multiple physical
channels (i.e., for the overall transceiver). For an
aggregate, this may be a measurement from a photodetector
or a a calculation performed on the device by summing up
all of the related individual physical channels.
Values include the instantaneous, average, minimum, and
maximum statistics. If avg/min/max statistics are not
supported, the target is expected to just supply the
instant value";
        uses oc-types:avg-min-max-instant-stats-precision2-dBm;
      }  // container input-power

      container laser-bias-current {
        description
          "The current applied by the system to the transmit laser to
achieve the output power. The current is expressed in mA
with up to two decimal precision. Values include the
instantaneous, average, minimum, and maximum statistics.
If avg/min/max statistics are not supported, the target is
expected to just supply the instant value";
        uses oc-types:avg-min-max-instant-stats-precision2-mA;
      }  // container laser-bias-current
    }  // grouping optical-power-state

    grouping output-optical-frequency {
      description
        "Reusable leaves related to optical output power -- this is
typically configurable on line side and read-only on the
client-side";
      leaf output-frequency {
        type oc-opt-types:frequency-type;
        description
          "The frequency in MHz of the individual physical channel
(e.g. ITU C50 - 195.0THz and would be reported as
195,000,000 MHz in this model). This attribute is not
configurable on most client ports.";
      }
    }  // grouping output-optical-frequency

    grouping physical-channel-config {
      description
        "Configuration data for physical client channels";
      leaf index {
        type uint16 {
          range "0..max";
        }
        description
          "Index of the physical channnel or lane within a physical
client port";
      }

      leaf associated-optical-channel {
        type leafref {
          path "/oc-platform:components/oc-platform:component/oc-platform:name";
        }
        description
          "A physical channel may reference an optical channel
component. If the physical channel does make this optional
reference, then a limited set of leaves will apply within
the physical channel to avoid duplication within the optical
channel.";
      }

      leaf description {
        type string;
        description
          "Text description for the client physical channel";
      }

      leaf tx-laser {
        type boolean;
        description
          "Enable (true) or disable (false) the transmit label for the
channel";
      }

      uses physical-channel-config-extended {
        when
          "../../../config/module-functional-type = 'oc-opt-types:TYPE_STANDARD_OPTIC'" {
          description
            "When the physical channel is of TYPE_STANDARD_OPTIC, the
extended config will be used";
        }
      }
    }  // grouping physical-channel-config

    grouping physical-channel-config-extended {
      description
        "Extended configuration data for physical client channels
for applications where the full physical channel config and
state are used. In some cases, such as when the physical
channel has a leafref to an optical channel component and the
module-functional-type is TYPE_DIGITAL_COHERENT_OPTIC this
grouping will NOT be used.";
      leaf target-output-power {
        type decimal64 {
          fraction-digits 2;
        }
        units "dBm";
        description
          "Target output optical power level of the optical channel,
expressed in increments of 0.01 dBm (decibel-milliwats)";
      }
    }  // grouping physical-channel-config-extended

    grouping physical-channel-state {
      description
        "Operational state data for client channels. In some cases,
such as when the physical channel has a leafref to an optical
channel component and the module-functional-type is
TYPE_DIGITAL_COHERENT_OPTIC this grouping will NOT be used.";
      uses physical-channel-state-extended {
        when
          "../../../state/module-functional-type = 'oc-opt-types:TYPE_STANDARD_OPTIC'" {
          description
            "When the physical channel is of TYPE_STANDARD_OPTIC, the
extended state will be used";
        }
      }
    }  // grouping physical-channel-state

    grouping physical-channel-state-extended {
      description
        "Extended operational state data for physical client channels
for applications where the full physical channel config and
state are used. In some cases, such as when the physical
channel has a leafref to an optical channel component and the
module-functional-type is TYPE_DIGITAL_COHERENT_OPTIC this
grouping will NOT be used.";
      uses output-optical-frequency;

      uses optical-power-state;
    }  // grouping physical-channel-state-extended

    grouping physical-channel-top {
      description
        "Top-level grouping for physical client channels";
      container physical-channels {
        description
          "Enclosing container for client channels";
        list channel {
          key "index";
          description
            "List of client channels, keyed by index within a physical
client port.  A physical port with a single channel would
have a single zero-indexed element";
          leaf index {
            type leafref {
              path "../config/index";
            }
            description
              "Reference to the index number of the channel";
          }

          container config {
            description
              "Configuration data for physical channels";
            uses physical-channel-config;
          }  // container config

          container state {
            config false;
            description
              "Operational state data for channels";
            uses physical-channel-config;

            uses physical-channel-state;
          }  // container state
        }  // list channel
      }  // container physical-channels
    }  // grouping physical-channel-top

    grouping port-transceiver-config {
      description
        "Configuration data for client port transceivers";
      leaf enabled {
        type boolean;
        description
          "Turns power on / off to the transceiver -- provides a means
to power on/off the transceiver (in the case of SFP, SFP+,
QSFP,...) or enable high-power mode (in the case of CFP,
CFP2, CFP4) and is optionally supported (device can choose to
always enable).  True = power on / high power, False =
powered off";
      }

      leaf form-factor-preconf {
        type identityref {
          base oc-opt-types:TRANSCEIVER_FORM_FACTOR_TYPE;
        }
        description
          "Indicates the type of optical transceiver used on this
port.  If the client port is built into the device and not
pluggable, then non-pluggable is the corresponding state. If
a device port supports multiple form factors (e.g. QSFP28
and QSFP+, then the value of the transceiver installed shall
be reported. If no transceiver is present, then the value of
the highest rate form factor shall be reported
(QSFP28, for example).

The form factor is included in configuration data to allow
pre-configuring a device with the expected type of
transceiver ahead of deployment.  The corresponding state
leaf should reflect the actual transceiver type plugged into
the system.";
      }

      leaf ethernet-pmd-preconf {
        type identityref {
          base oc-opt-types:ETHERNET_PMD_TYPE;
        }
        description
          "The Ethernet PMD is a property of the optical transceiver
used on the port, indicating the type of physical connection.
It is included in configuration data to allow pre-configuring
a port/transceiver with the expected PMD.  The actual PMD is
indicated by the ethernet-pmd state leaf.";
      }

      leaf fec-mode {
        type identityref {
          base oc-platform-types:FEC_MODE_TYPE;
        }
        description
          "The FEC mode indicates the mode of operation for the
transceiver's FEC. This defines typical operational modes
and does not aim to specify more granular FEC capabilities.";
      }

      leaf module-functional-type {
        type identityref {
          base oc-opt-types:TRANSCEIVER_MODULE_FUNCTIONAL_TYPE;
        }
        description
          "Indicates the module functional type which represents the
functional capability of the transceiver. For example, this
would specify the module is a digital coherent optic or a
standard grey optic that performs on-off keying.";
      }
    }  // grouping port-transceiver-config

    grouping port-transceiver-state {
      description
        "Operational state data for client port transceivers";
      leaf present {
        type enumeration {
          enum "PRESENT" {
            value 0;
            description
              "Transceiver is present on the port";
          }
          enum "NOT_PRESENT" {
            value 1;
            description
              "Transceiver is not present on the port";
          }
        }
        description
          "Indicates whether a transceiver is present in
the specified client port.";
      }

      leaf form-factor {
        type identityref {
          base oc-opt-types:TRANSCEIVER_FORM_FACTOR_TYPE;
        }
        description
          "Indicates the type of optical transceiver used on this
port.  If the client port is built into the device and not
pluggable, then non-pluggable is the corresponding state. If
a device port supports multiple form factors (e.g. QSFP28
and QSFP+, then the value of the transceiver installed shall
be reported. If no transceiver is present, then the value of
the highest rate form factor shall be reported
(QSFP28, for example).";
      }

      leaf connector-type {
        type identityref {
          base oc-opt-types:FIBER_CONNECTOR_TYPE;
        }
        description
          "Connector type used on this port";
      }

      leaf vendor {
        type string {
          length "1..16";
        }
        description
          "Full name of transceiver vendor. 16-octet field that
contains ASCII characters, left-aligned and padded on the
right with ASCII spaces (20h)";
      }

      leaf vendor-part {
        type string {
          length "1..16";
        }
        description
          "Transceiver vendor's part number. 16-octet field that
contains ASCII characters, left-aligned and padded on the
right with ASCII spaces (20h). If part number is undefined,
all 16 octets = 0h";
      }

      leaf vendor-rev {
        type string {
          length "1..2";
        }
        description
          "Transceiver vendor's revision number. 2-octet field that
contains ASCII characters, left-aligned and padded on the
right with ASCII spaces (20h)";
      }

      leaf ethernet-pmd {
        type identityref {
          base oc-opt-types:ETHERNET_PMD_TYPE;
        }
        description
          "Ethernet PMD (physical medium dependent sublayer) that the
transceiver supports. The SFF/QSFP MSAs have registers for
this and CFP MSA has similar.";
      }

      leaf sonet-sdh-compliance-code {
        type identityref {
          base oc-opt-types:SONET_APPLICATION_CODE;
        }
        description
          "SONET/SDH application code supported by the port";
      }

      leaf otn-compliance-code {
        type identityref {
          base oc-opt-types:OTN_APPLICATION_CODE;
        }
        description
          "OTN application code supported by the port";
      }

      leaf serial-no {
        type string {
          length "1..16";
        }
        description
          "Transceiver serial number. 16-octet field that contains
ASCII characters, left-aligned and padded on the right with
ASCII spaces (20h). If part serial number is undefined, all
16 octets = 0h";
      }

      leaf date-code {
        type oc-yang:date-and-time;
        description
          "Representation of the transceiver date code, typically
stored as YYMMDD.  The time portion of the value is
undefined and not intended to be read.";
      }

      leaf fault-condition {
        type boolean;
        description
          "Indicates if a fault condition exists in the transceiver";
      }

      leaf fec-status {
        type identityref {
          base oc-platform-types:FEC_STATUS_TYPE;
        }
        description
          "Operational status of FEC";
      }

      leaf fec-uncorrectable-blocks {
        type yang:counter64;
        description
          "The number of blocks that were uncorrectable by the FEC";
      }

      leaf fec-uncorrectable-words {
        type yang:counter64;
        description
          "The number of words that were uncorrectable by the FEC";
      }

      leaf fec-corrected-bytes {
        type yang:counter64;
        description
          "The number of bytes that were corrected by the FEC";
      }

      leaf fec-corrected-bits {
        type yang:counter64;
        description
          "The number of bits that were corrected by the FEC";
      }

      container pre-fec-ber {
        description
          "Bit error rate before forward error correction -- computed
value with 18 decimal precision. Note that decimal64
supports values as small as i x 10^-18 where i is an
integer. Values smaller than this should be reported as 0
to inidicate error free or near error free performance.
Values include the instantaneous, average, minimum, and
maximum statistics. If avg/min/max statistics are not
supported, the target is expected to just supply the
instant value";
        uses oc-opt-types:avg-min-max-instant-stats-precision18-ber;
      }  // container pre-fec-ber

      container post-fec-ber {
        description
          "Bit error rate after forward error correction -- computed
value with 18 decimal precision. Note that decimal64
supports values as small as i x 10^-18 where i is an
integer. Values smaller than this should be reported as 0
to inidicate error free or near error free performance.
Values include the instantaneous, average, minimum, and
maximum statistics. If avg/min/max statistics are not
supported, the target is expected to just supply the
instant value";
        uses oc-opt-types:avg-min-max-instant-stats-precision18-ber;
      }  // container post-fec-ber

      uses optical-power-state;
    }  // grouping port-transceiver-state

    grouping port-transceiver-top {
      description
        "Top-level grouping for client port transceiver data";
      container transceiver {
        description
          "Top-level container for client port transceiver data";
        container config {
          description
            "Configuration data for client port transceivers";
          uses port-transceiver-config;
        }  // container config

        container state {
          config false;
          description
            "Operational state data for client port transceivers";
          uses port-transceiver-config;

          uses port-transceiver-state;
        }  // container state

        uses physical-channel-top;
      }  // container transceiver
    }  // grouping port-transceiver-top

    augment /oc-platform:components/oc-platform:component {
      description
        "Adding transceiver data to physical inventory. This subtree is
only valid when the type of the component is TRANSCEIVER.";
      uses port-transceiver-top;
    }

    augment /oc-if:interfaces/oc-if:interface/oc-if:state {
      description
        "Adds a reference from an interface to the corresponding
transceiver component.";
      leaf transceiver {
        type leafref {
          path "/oc-platform:components/oc-platform:component[oc-platform:name=current()/../oc-port:hardware-port]/oc-platform:subcomponents/oc-platform:subcomponent/oc-platform:name";
        }
        description
          "Provides a reference to the transceiver subcomponent that
corresponds to the physical port component for this interface.
The device must only populate this leaf with a reference to
a component of type TRANSCEIVER.";
      }
    }

    augment /oc-if:interfaces/oc-if:interface/oc-if:state {
      description
        "Adds a reference from the base interface to its corresponding
physical channels.";
      leaf-list physical-channel {
        type leafref {
          path "/oc-platform:components/oc-platform:component[oc-platform:name=current()/../oc-transceiver:transceiver]/oc-transceiver:transceiver/oc-transceiver:physical-channels/oc-transceiver:channel/oc-transceiver:index";
        }
        description
          "For a channelized interface, list of references to the
physical channels (lanes) corresponding to the interface.
The physical channels are elements of a transceiver component
in the platform model.";
      }
    }
  }  // module openconfig-platform-transceiver