1d3bb99648
Based on BenH's earlier work, this is a new version of the EMAC driver for the built-in ethernet found on PowerPC 4xx embedded CPUs. The same ASIC is also found in the Axon bridge chip. This new version is designed to work in the arch/powerpc tree, using the device tree to probe the device, rather than the old and ugly arch/ppc OCP layer. This driver is designed to sit alongside the old driver (that lies in drivers/net/ibm_emac and this one in drivers/net/ibm_newemac). The old driver is left in place to support arch/ppc until arch/ppc itself reaches its final demise (not too long now, with luck). This driver still has a number of things that could do with cleaning up, but I think they can be fixed up after merging. Specifically: - Should be adjusted to properly use the dma mapping API. Axon needs this. - Probe logic needs reworking, in conjuction with the general probing code for of_platform devices. The dependencies here between EMAC, MAL, ZMII etc. make this complicated. At present, it usually works, because we initialize and register the sub-drivers before the EMAC driver itself, and (being in driver code) runs after the devices themselves have been instantiated from the device tree. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Jeff Garzik <jeff@garzik.org>
70 lines
1.5 KiB
Text
70 lines
1.5 KiB
Text
config IBM_EMAC
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tristate "PowerPC 4xx on-chip Ethernet support"
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depends on 4xx && !PPC_MERGE
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help
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This driver supports the PowerPC 4xx EMAC family of on-chip
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Ethernet controllers.
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config IBM_EMAC_RXB
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int "Number of receive buffers"
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depends on IBM_EMAC
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default "128"
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config IBM_EMAC_TXB
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int "Number of transmit buffers"
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depends on IBM_EMAC
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default "64"
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config IBM_EMAC_POLL_WEIGHT
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int "MAL NAPI polling weight"
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depends on IBM_EMAC
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default "32"
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config IBM_EMAC_RX_COPY_THRESHOLD
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int "RX skb copy threshold (bytes)"
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depends on IBM_EMAC
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default "256"
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config IBM_EMAC_RX_SKB_HEADROOM
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int "Additional RX skb headroom (bytes)"
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depends on IBM_EMAC
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default "0"
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help
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Additional receive skb headroom. Note, that driver
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will always reserve at least 2 bytes to make IP header
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aligned, so usually there is no need to add any additional
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headroom.
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If unsure, set to 0.
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config IBM_EMAC_PHY_RX_CLK_FIX
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bool "PHY Rx clock workaround"
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depends on IBM_EMAC && (405EP || 440GX || 440EP || 440GR)
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help
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Enable this if EMAC attached to a PHY which doesn't generate
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RX clock if there is no link, if this is the case, you will
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see "TX disable timeout" or "RX disable timeout" in the system
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log.
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If unsure, say N.
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config IBM_EMAC_DEBUG
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bool "Debugging"
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depends on IBM_EMAC
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default n
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config IBM_EMAC_ZMII
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bool
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depends on IBM_EMAC && (NP405H || NP405L || 44x)
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default y
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config IBM_EMAC_RGMII
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bool
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depends on IBM_EMAC && 440GX
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default y
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config IBM_EMAC_TAH
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bool
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depends on IBM_EMAC && 440GX
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default y
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