Device tree aware EMAC driver
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>
2007-08-23 10:56:01 +07:00
|
|
|
config IBM_NEW_EMAC
|
|
|
|
|
tristate "IBM EMAC Ethernet support"
|
2008-09-23 04:52:19 +07:00
|
|
|
depends on PPC_DCR
|
2008-06-18 06:27:55 +07:00
|
|
|
select CRC32
|
Device tree aware EMAC driver
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>
2007-08-23 10:56:01 +07:00
|
|
|
help
|
|
|
|
|
This driver supports the IBM EMAC family of Ethernet controllers
|
|
|
|
|
typically found on 4xx embedded PowerPC chips, but also on the
|
|
|
|
|
Axon southbridge for Cell.
|
|
|
|
|
|
|
|
|
|
config IBM_NEW_EMAC_RXB
|
|
|
|
|
int "Number of receive buffers"
|
|
|
|
|
depends on IBM_NEW_EMAC
|
|
|
|
|
default "128"
|
|
|
|
|
|
|
|
|
|
config IBM_NEW_EMAC_TXB
|
|
|
|
|
int "Number of transmit buffers"
|
|
|
|
|
depends on IBM_NEW_EMAC
|
|
|
|
|
default "64"
|
|
|
|
|
|
|
|
|
|
config IBM_NEW_EMAC_POLL_WEIGHT
|
|
|
|
|
int "MAL NAPI polling weight"
|
|
|
|
|
depends on IBM_NEW_EMAC
|
|
|
|
|
default "32"
|
|
|
|
|
|
|
|
|
|
config IBM_NEW_EMAC_RX_COPY_THRESHOLD
|
|
|
|
|
int "RX skb copy threshold (bytes)"
|
|
|
|
|
depends on IBM_NEW_EMAC
|
|
|
|
|
default "256"
|
|
|
|
|
|
|
|
|
|
config IBM_NEW_EMAC_RX_SKB_HEADROOM
|
|
|
|
|
int "Additional RX skb headroom (bytes)"
|
|
|
|
|
depends on IBM_NEW_EMAC
|
|
|
|
|
default "0"
|
|
|
|
|
help
|
|
|
|
|
Additional receive skb headroom. Note, that driver
|
|
|
|
|
will always reserve at least 2 bytes to make IP header
|
|
|
|
|
aligned, so usually there is no need to add any additional
|
|
|
|
|
headroom.
|
|
|
|
|
|
|
|
|
|
If unsure, set to 0.
|
|
|
|
|
|
|
|
|
|
config IBM_NEW_EMAC_DEBUG
|
|
|
|
|
bool "Debugging"
|
|
|
|
|
depends on IBM_NEW_EMAC
|
|
|
|
|
default n
|
|
|
|
|
|
|
|
|
|
# The options below has to be select'ed by the respective
|
|
|
|
|
# processor types or platforms
|
|
|
|
|
|
|
|
|
|
config IBM_NEW_EMAC_ZMII
|
|
|
|
|
bool
|
|
|
|
|
default n
|
|
|
|
|
|
|
|
|
|
config IBM_NEW_EMAC_RGMII
|
|
|
|
|
bool
|
|
|
|
|
default n
|
|
|
|
|
|
|
|
|
|
config IBM_NEW_EMAC_TAH
|
|
|
|
|
bool
|
|
|
|
|
default n
|
|
|
|
|
|
|
|
|
|
config IBM_NEW_EMAC_EMAC4
|
|
|
|
|
bool
|
|
|
|
|
default n
|
2008-09-04 09:57:57 +07:00
|
|
|
|
|
|
|
|
config IBM_NEW_EMAC_NO_FLOW_CTRL
|
|
|
|
|
bool
|
|
|
|
|
default n
|
2008-09-04 11:03:45 +07:00
|
|
|
|
|
|
|
|
config IBM_NEW_EMAC_MAL_CLR_ICINTSTAT
|
|
|
|
|
bool
|
|
|
|
|
default n
|
|
|
|
|
|
|
|
|
|
config IBM_NEW_EMAC_MAL_COMMON_ERR
|
|
|
|
|
bool
|
|
|
|
|
default n
|