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+This document describes the device tree bindings associated with the
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+keystone network coprocessor(NetCP) driver support.
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+
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+The network coprocessor (NetCP) is a hardware accelerator that processes
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+Ethernet packets. NetCP has a gigabit Ethernet (GbE) subsytem with a ethernet
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+switch sub-module to send and receive packets. NetCP also includes a packet
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+accelerator (PA) module to perform packet classification operations such as
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+header matching, and packet modification operations such as checksum
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+generation. NetCP can also optionally include a Security Accelerator (SA)
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+capable of performing IPSec operations on ingress/egress packets.
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+
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+Keystone II SoC's also have a 10 Gigabit Ethernet Subsystem (XGbE) which
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+includes a 3-port Ethernet switch sub-module capable of 10Gb/s and 1Gb/s rates
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+per Ethernet port.
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+
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+Keystone NetCP driver has a plug-in module architecture where each of the NetCP
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+sub-modules exist as a loadable kernel module which plug in to the netcp core.
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+These sub-modules are represented as "netcp-devices" in the dts bindings. It is
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+mandatory to have the ethernet switch sub-module for the ethernet interface to
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+be operational. Any other sub-module like the PA is optional.
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+
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+NetCP Ethernet SubSystem Layout:
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+
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+-----------------------------
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+ NetCP subsystem(10G or 1G)
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+-----------------------------
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+ |
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+ |-> NetCP Devices -> |
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+ | |-> GBE/XGBE Switch
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+ | |
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+ | |-> Packet Accelerator
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+ | |
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+ | |-> Security Accelerator
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+ |
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+ |
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+ |
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+ |-> NetCP Interfaces -> |
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+ |-> Ethernet Port 0
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+ |
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+ |-> Ethernet Port 1
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+ |
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+ |-> Ethernet Port 2
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+ |
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+ |-> Ethernet Port 3
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+
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+
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+NetCP subsystem properties:
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+Required properties:
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+- compatible: Should be "ti,netcp-1.0"
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+- clocks: phandle to the reference clocks for the subsystem.
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+- dma-id: Navigator packet dma instance id.
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+
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+Optional properties:
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+- reg: register location and the size for the following register
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+ regions in the specified order.
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+ - Efuse MAC address register
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+- dma-coherent: Present if dma operations are coherent
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+- big-endian: Keystone devices can be operated in a mode where the DSP is in
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+ the big endian mode. In such cases enable this option. This
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+ option should also be enabled if the ARM is operated in
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+ big endian mode with the DSP in little endian.
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+
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+NetCP device properties: Device specification for NetCP sub-modules.
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+1Gb/10Gb (gbe/xgbe) ethernet switch sub-module specifications.
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+Required properties:
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+- label: Must be "netcp-gbe" for 1Gb & "netcp-xgbe" for 10Gb.
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+- reg: register location and the size for the following register
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+ regions in the specified order.
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+ - subsystem registers
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+ - serdes registers
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+- tx-channel: the navigator packet dma channel name for tx.
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+- tx-queue: the navigator queue number associated with the tx dma channel.
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+- interfaces: specification for each of the switch port to be registered as a
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+ network interface in the stack.
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+-- slave-port: Switch port number, 0 based numbering.
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+-- link-interface: type of link interface, supported options are
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+ - mac<->mac auto negotiate mode: 0
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+ - mac<->phy mode: 1
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+ - mac<->mac forced mode: 2
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+ - mac<->fiber mode: 3
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+ - mac<->phy mode with no mdio: 4
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+ - 10Gb mac<->phy mode : 10
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+ - 10Gb mac<->mac forced mode : 11
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+----phy-handle: phandle to PHY device
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+
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+Optional properties:
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+- enable-ale: NetCP driver keeps the address learning feature in the ethernet
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+ switch module disabled. This attribute is to enable the address
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+ learning.
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+- secondary-slave-ports: specification for each of the switch port not be
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+ registered as a network interface. NetCP driver
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+ will only initialize these ports and attach PHY
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+ driver to them if needed.
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+
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+NetCP interface properties: Interface specification for NetCP sub-modules.
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+Required properties:
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+- rx-channel: the navigator packet dma channel name for rx.
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+- rx-queue: the navigator queue number associated with rx dma channel.
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+- rx-pool: specifies the number of descriptors to be used & the region-id
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+ for creating the rx descriptor pool.
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+- tx-pool: specifies the number of descriptors to be used & the region-id
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+ for creating the tx descriptor pool.
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+- rx-queue-depth: number of descriptors in each of the free descriptor
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+ queue (FDQ) for the pktdma Rx flow. There can be at
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+ present a maximum of 4 queues per Rx flow.
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+- rx-buffer-size: the buffer size for each of the Rx flow FDQ.
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+- tx-completion-queue: the navigator queue number where the descriptors are
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+ recycled after Tx DMA completion.
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+
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+Optional properties:
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+- efuse-mac: If this is 1, then the MAC address for the interface is
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+ obtained from the device efuse mac address register
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+- local-mac-address: the driver is designed to use the of_get_mac_address api
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+ only if efuse-mac is 0. When efuse-mac is 0, the MAC
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+ address is obtained from local-mac-address. If this
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+ attribute is not present, then the driver will use a
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+ random MAC address.
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+- "netcp-device label": phandle to the device specification for each of NetCP
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+ sub-module attached to this interface.
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+
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+Example binding:
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+
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+netcp: netcp@2090000 {
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+ reg = <0x2620110 0x8>;
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+ reg-names = "efuse";
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+ compatible = "ti,netcp-1.0";
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+ #address-cells = <1>;
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+ #size-cells = <1>;
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+ ranges;
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+
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+ clocks = <&papllclk>, <&clkcpgmac>, <&chipclk12>;
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+ dma-coherent;
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+ /* big-endian; */
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+ dma-id = <0>;
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+
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+ netcp-devices {
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+ #address-cells = <1>;
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+ #size-cells = <1>;
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+ ranges;
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+ gbe@0x2090000 {
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+ label = "netcp-gbe";
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+ reg = <0x2090000 0xf00>;
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+ /* enable-ale; */
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+ tx-queue = <648>;
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+ tx-channel = <8>;
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+
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+ interfaces {
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+ gbe0: interface-0 {
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+ slave-port = <0>;
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+ link-interface = <4>;
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+ };
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+ gbe1: interface-1 {
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+ slave-port = <1>;
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+ link-interface = <4>;
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+ };
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+ };
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+
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+ secondary-slave-ports {
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+ port-2 {
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+ slave-port = <2>;
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+ link-interface = <2>;
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+ };
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+ port-3 {
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+ slave-port = <3>;
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+ link-interface = <2>;
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+ };
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+ };
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+ };
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+ };
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+
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+ netcp-interfaces {
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+ interface-0 {
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+ rx-channel = <22>;
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+ rx-pool = <1024 12>;
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+ tx-pool = <1024 12>;
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+ rx-queue-depth = <128 128 0 0>;
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+ rx-buffer-size = <1518 4096 0 0>;
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+ rx-queue = <8704>;
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+ tx-completion-queue = <8706>;
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+ efuse-mac = <1>;
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+ netcp-gbe = <&gbe0>;
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+
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+ };
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+ interface-1 {
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+ rx-channel = <23>;
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+ rx-pool = <1024 12>;
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+ tx-pool = <1024 12>;
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+ rx-queue-depth = <128 128 0 0>;
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+ rx-buffer-size = <1518 4096 0 0>;
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+ rx-queue = <8705>;
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+ tx-completion-queue = <8707>;
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+ efuse-mac = <0>;
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+ local-mac-address = [02 18 31 7e 3e 6f];
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+ netcp-gbe = <&gbe1>;
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+ };
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+ };
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+};
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Karicheri, Muralidharan