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37 lines
1.3 KiB
37 lines
1.3 KiB
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LAN9303 Ethernet switch driver |
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The LAN9303 is a three port 10/100 Mbps ethernet switch with integrated phys for |
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the two external ethernet ports. The third port is an RMII/MII interface to a |
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host master network interface (e.g. fixed link). |
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Driver details |
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============== |
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The driver is implemented as a DSA driver, see ``Documentation/networking/dsa/dsa.rst``. |
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See ``Documentation/devicetree/bindings/net/dsa/lan9303.txt`` for device tree |
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binding. |
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The LAN9303 can be managed both via MDIO and I2C, both supported by this driver. |
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At startup the driver configures the device to provide two separate network |
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interfaces (which is the default state of a DSA device). Due to HW limitations, |
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no HW MAC learning takes place in this mode. |
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When both user ports are joined to the same bridge, the normal HW MAC learning |
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is enabled. This means that unicast traffic is forwarded in HW. Broadcast and |
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multicast is flooded in HW. STP is also supported in this mode. The driver |
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support fdb/mdb operations as well, meaning IGMP snooping is supported. |
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If one of the user ports leave the bridge, the ports goes back to the initial |
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separated operation. |
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Driver limitations |
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================== |
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- Support for VLAN filtering is not implemented |
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- The HW does not support VLAN-specific fdb entries
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