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Diffstat (limited to 'roms/u-boot/doc/README.fec_mxc')
| -rw-r--r-- | roms/u-boot/doc/README.fec_mxc | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/roms/u-boot/doc/README.fec_mxc b/roms/u-boot/doc/README.fec_mxc new file mode 100644 index 000000000..9ca6ac2fb --- /dev/null +++ b/roms/u-boot/doc/README.fec_mxc @@ -0,0 +1,39 @@ +U-Boot config options used in fec_mxc.c + +CONFIG_FEC_MXC + Selects fec_mxc.c to be compiled into u-boot. Can read out the + ethaddr from the SoC eFuses (see below). + +CONFIG_MII + Must be defined if CONFIG_FEC_MXC is defined. + +CONFIG_FEC_XCV_TYPE + Defaults to MII100 for 100 Base-tx. + RGMII selects 1000 Base-tx reduced pin count interface. + RMII selects 100 Base-tx reduced pin count interface. + +CONFIG_FEC_MXC_SWAP_PACKET + Forced on iff MX28. + Swaps the bytes order of all words(4 byte units) in the packet. + This should not be specified by a board file. It is cpu specific. + +CONFIG_PHYLIB + fec_mxc supports PHYLIB and should be used for new boards. + +CONFIG_FEC_MXC_NO_ANEG + Relevant only if PHYLIB not used. Skips auto-negotiation restart. + +CONFIG_FEC_MXC_PHYADDR + Optional, selects the exact phy address that should be connected + and function fecmxc_initialize will try to initialize it. + +CONFIG_FEC_FIXED_SPEED + Optional, selects a fixed speed on the MAC interface without asking some + phy. This is usefull if there is a direct MAC <-> MAC connection, for + example if the CPU is connected directly via the RGMII interface to a + ethernet-switch. + +Reading the ethaddr from the SoC eFuses: +if CONFIG_FEC_MXC is defined and the U-Boot environment does not contain the +ethaddr variable, then its value gets read from the corresponding eFuses in +the SoC. See the README files of the specific SoC for details. |