1 This document describes the device tree bindings associated with the
2 keystone network coprocessor(NetCP) driver support.
4 The network coprocessor (NetCP) is a hardware accelerator that processes
5 Ethernet packets. NetCP has a gigabit Ethernet (GbE) subsystem with a ethernet
6 switch sub-module to send and receive packets. NetCP also includes a packet
7 accelerator (PA) module to perform packet classification operations such as
8 header matching, and packet modification operations such as checksum
9 generation. NetCP can also optionally include a Security Accelerator (SA)
10 capable of performing IPSec operations on ingress/egress packets.
12 Keystone II SoC's also have a 10 Gigabit Ethernet Subsystem (XGbE) which
13 includes a 3-port Ethernet switch sub-module capable of 10Gb/s and 1Gb/s rates
16 Keystone NetCP driver has a plug-in module architecture where each of the NetCP
17 sub-modules exist as a loadable kernel module which plug in to the netcp core.
18 These sub-modules are represented as "netcp-devices" in the dts bindings. It is
19 mandatory to have the ethernet switch sub-module for the ethernet interface to
20 be operational. Any other sub-module like the PA is optional.
22 NetCP Ethernet SubSystem Layout:
24 -----------------------------
25 NetCP subsystem(10G or 1G)
26 -----------------------------
28 |-> NetCP Devices -> |
31 | |-> Packet Accelerator
33 | |-> Security Accelerator
37 |-> NetCP Interfaces -> |
47 NetCP subsystem properties:
49 - compatible: Should be "ti,netcp-1.0"
50 - clocks: phandle to the reference clocks for the subsystem.
51 - dma-id: Navigator packet dma instance id.
52 - ranges: address range of NetCP (includes, Ethernet SS, PA and SA)
55 - reg: register location and the size for the following register
56 regions in the specified order.
57 - Efuse MAC address register
58 - dma-coherent: Present if dma operations are coherent
59 - big-endian: Keystone devices can be operated in a mode where the DSP is in
60 the big endian mode. In such cases enable this option. This
61 option should also be enabled if the ARM is operated in
62 big endian mode with the DSP in little endian.
64 NetCP device properties: Device specification for NetCP sub-modules.
65 1Gb/10Gb (gbe/xgbe) ethernet switch sub-module specifications.
67 - label: Must be "netcp-gbe" for 1Gb & "netcp-xgbe" for 10Gb.
68 - compatible: Must be one of below:-
69 "ti,netcp-gbe" for 1GbE on NetCP 1.4
70 "ti,netcp-gbe-5" for 1GbE N NetCP 1.5 (N=5)
71 "ti,netcp-gbe-9" for 1GbE N NetCP 1.5 (N=9)
72 "ti,netcp-gbe-2" for 1GbE N NetCP 1.5 (N=2)
73 "ti,netcp-xgbe" for 10 GbE
75 - reg: register location and the size for the following register
76 regions in the specified order.
77 - switch subsystem registers
78 - sgmii port3/4 module registers (only for NetCP 1.4)
79 - switch module registers
80 - serdes registers (only for 10G)
82 NetCP 1.4 ethss, here is the order
83 index #0 - switch subsystem registers
84 index #1 - sgmii port3/4 module registers
85 index #2 - switch module registers
87 NetCP 1.5 ethss 9 port, 5 port and 2 port
88 index #0 - switch subsystem registers
89 index #1 - switch module registers
90 index #2 - serdes registers
92 - tx-channel: the navigator packet dma channel name for tx.
93 - tx-queue: the navigator queue number associated with the tx dma channel.
94 - interfaces: specification for each of the switch port to be registered as a
95 network interface in the stack.
96 -- slave-port: Switch port number, 0 based numbering.
97 -- link-interface: type of link interface, supported options are
98 - mac<->mac auto negotiate mode: 0
100 - mac<->mac forced mode: 2
101 - mac<->fiber mode: 3
102 - mac<->phy mode with no mdio: 4
103 - 10Gb mac<->phy mode : 10
104 - 10Gb mac<->mac forced mode : 11
105 ----phy-handle: phandle to PHY device
108 - enable-ale: NetCP driver keeps the address learning feature in the ethernet
109 switch module disabled. This attribute is to enable the address
111 - secondary-slave-ports: specification for each of the switch port not be
112 registered as a network interface. NetCP driver
113 will only initialize these ports and attach PHY
114 driver to them if needed.
116 NetCP interface properties: Interface specification for NetCP sub-modules.
118 - rx-channel: the navigator packet dma channel name for rx.
119 - rx-queue: the navigator queue number associated with rx dma channel.
120 - rx-pool: specifies the number of descriptors to be used & the region-id
121 for creating the rx descriptor pool.
122 - tx-pool: specifies the number of descriptors to be used & the region-id
123 for creating the tx descriptor pool.
124 - rx-queue-depth: number of descriptors in each of the free descriptor
125 queue (FDQ) for the pktdma Rx flow. There can be at
126 present a maximum of 4 queues per Rx flow.
127 - rx-buffer-size: the buffer size for each of the Rx flow FDQ.
128 - tx-completion-queue: the navigator queue number where the descriptors are
129 recycled after Tx DMA completion.
132 - efuse-mac: If this is 1, then the MAC address for the interface is
133 obtained from the device efuse mac address register.
134 If this is 2, the two DWORDs occupied by the MAC address
135 are swapped. The netcp driver will swap the two DWORDs
136 back to the proper order when this property is set to 2
137 when it obtains the mac address from efuse.
138 - local-mac-address: the driver is designed to use the of_get_mac_address api
139 only if efuse-mac is 0. When efuse-mac is 0, the MAC
140 address is obtained from local-mac-address. If this
141 attribute is not present, then the driver will use a
143 - "netcp-device label": phandle to the device specification for each of NetCP
144 sub-module attached to this interface.
148 netcp: netcp@2000000 {
149 reg = <0x2620110 0x8>;
151 compatible = "ti,netcp-1.0";
152 #address-cells = <1>;
154 ranges = <0 0x2000000 0xfffff>;
155 clocks = <&papllclk>, <&clkcpgmac>, <&chipclk12>;
161 #address-cells = <1>;
166 reg = <0x90000 0x300>, <0x90400 0x400>, <0x90800 0x700>;
174 link-interface = <4>;
178 link-interface = <4>;
182 secondary-slave-ports {
185 link-interface = <2>;
189 link-interface = <2>;
200 rx-queue-depth = <128 128 0 0>;
201 rx-buffer-size = <1518 4096 0 0>;
203 tx-completion-queue = <8706>;
212 rx-queue-depth = <128 128 0 0>;
213 rx-buffer-size = <1518 4096 0 0>;
215 tx-completion-queue = <8707>;
217 local-mac-address = [02 18 31 7e 3e 6f];