diff options
author | Adrian Chadd <adrian@FreeBSD.org> | 2012-05-01 06:11:38 +0000 |
---|---|---|
committer | Adrian Chadd <adrian@FreeBSD.org> | 2012-05-01 06:11:38 +0000 |
commit | 4574da7fee8c358cbae84e7030b6701b8cad0f59 (patch) | |
tree | d50a940ec073bc183416ae5258cbbf4502881f45 /sys/dev/etherswitch/mdio_if.m | |
parent | 803a5133e81487f572c137f9386b8b2918116dd0 (diff) | |
download | src-4574da7fee8c358cbae84e7030b6701b8cad0f59.tar.gz src-4574da7fee8c358cbae84e7030b6701b8cad0f59.zip |
Bring over the first part of the etherswitch framework - an MDIO bus and
MDIO/MII rendezvous proxy.
* Add an 'mdio' bus, which is the "IO" side of an MII bus (but by design
can be anything which implements the underlying register access API.)
* Add 'miiproxy' and 'mdioproxy', which provides a rendezvous mechanism
for MII busses to appear hanging off arbitrary busses (ie, that aren't
necessarily a traditional looking MII bus.)
MII busses can now hang off anything that implements an mdiobus.
For the AR71xx SoC, there's one MDIO bus but two MII busses. So to
properly support two or more real PHYs, this can be done:
# arge0 MDIO bus - there's no arge1 MDIO bus for AR71xx
hint.argemdio.0.at="nexus0"
hint.argemdio.0.maddr=0x19000000
hint.argemdio.0.msize=0x1000
hint.argemdio.0.order=0
# Create two mdioproxy instances
hint.mdioproxy.0.at="mdio0"
hint.mdioproxy.1.at="mdio0"
# .. and with a follow-up patch
hint.arge.0.mdio=mdioproxy0
hint.arge.1.mdio=mdioproxy0
TODO:
* Do a sweep or two and add appropriate locking in mdio/mdioproxy/miiproxy.
Submitted by: Stefan Bethke <stb@lassitu.de>
Reviewed by: ray
Notes
Notes:
svn path=/head/; revision=234861
Diffstat (limited to 'sys/dev/etherswitch/mdio_if.m')
-rw-r--r-- | sys/dev/etherswitch/mdio_if.m | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/sys/dev/etherswitch/mdio_if.m b/sys/dev/etherswitch/mdio_if.m new file mode 100644 index 000000000000..9aedd92d292b --- /dev/null +++ b/sys/dev/etherswitch/mdio_if.m @@ -0,0 +1,24 @@ +# $FreeBSD$ + +#include <sys/bus.h> + +INTERFACE mdio; + +# +# Read register from device on MDIO bus +# +METHOD int readreg { + device_t dev; + int phy; + int reg; +}; + +# +# Write register to device on MDIO bus +# +METHOD int writereg { + device_t dev; + int phy; + int reg; + int val; +}; |