84 lines
2.8 KiB
Plaintext
84 lines
2.8 KiB
Plaintext
Marvell Orion/Discovery ethernet controller
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=============================================
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The Marvell Discovery ethernet controller can be found on Marvell Orion SoCs
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(Kirkwood, Dove, Orion5x, and Discovery Innovation) and as part of Marvell
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Discovery system controller chips (mv64[345]60).
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The Discovery ethernet controller is described with two levels of nodes. The
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first level describes the ethernet controller itself and the second level
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describes up to 3 ethernet port nodes within that controller. The reason for
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the multiple levels is that the port registers are interleaved within a single
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set of controller registers. Each port node describes port-specific properties.
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Note: The above separation is only true for Discovery system controllers.
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For Orion SoCs we stick to the separation, although there each controller has
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only one port associated. Multiple ports are implemented as multiple single-port
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controllers. As Kirkwood has some issues with proper initialization after reset,
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an extra compatible string is added for it.
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* Ethernet controller node
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Required controller properties:
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- #address-cells: shall be 1.
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- #size-cells: shall be 0.
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- compatible: shall be one of "marvell,orion-eth", "marvell,kirkwood-eth".
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- reg: address and length of the controller registers.
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Optional controller properties:
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- clocks: phandle reference to the controller clock.
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- marvell,tx-checksum-limit: max tx packet size for hardware checksum.
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* Ethernet port node
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Required port properties:
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- compatible: shall be one of "marvell,orion-eth-port",
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"marvell,kirkwood-eth-port".
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- reg: port number relative to ethernet controller, shall be 0, 1, or 2.
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- interrupts: port interrupt.
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- local-mac-address: See ethernet.txt file in the same directory.
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Optional port properties:
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- marvell,tx-queue-size: size of the transmit ring buffer.
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- marvell,tx-sram-addr: address of transmit descriptor buffer located in SRAM.
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- marvell,tx-sram-size: size of transmit descriptor buffer located in SRAM.
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- marvell,rx-queue-size: size of the receive ring buffer.
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- marvell,rx-sram-addr: address of receive descriptor buffer located in SRAM.
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- marvell,rx-sram-size: size of receive descriptor buffer located in SRAM.
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and
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- phy-handle: See ethernet.txt file in the same directory.
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- phy-mode: See ethernet.txt file in the same directory.
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or
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- speed: port speed if no PHY connected.
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- duplex: port mode if no PHY connected.
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* Node example:
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mdio-bus {
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...
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ethphy: ethernet-phy@8 {
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...
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};
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};
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eth: ethernet-controller@72000 {
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compatible = "marvell,orion-eth";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x72000 0x2000>;
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clocks = <&gate_clk 2>;
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marvell,tx-checksum-limit = <1600>;
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ethernet@0 {
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compatible = "marvell,orion-eth-port";
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reg = <0>;
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interrupts = <29>;
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phy-handle = <ðphy>;
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local-mac-address = [00 00 00 00 00 00];
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};
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};
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