cvs commit: src/sys/dev/mii brgphy.c
jdp at polstra.com
Tue Mar 20 19:45:11 UTC 2007
Jung-uk Kim wrote:
> jkim 2007-03-19 23:17:39 UTC
> FreeBSD src repository
> Modified files:
> sys/dev/mii brgphy.c
> Revert couple of changes from 1.51 and 1.52. Reading link status with BMSR
> is okay for most of the chipsets but BCM5701 PHY does not seem to like it.
I'm not sure what you mean by "does not seem to like it", but did you
try reading the BMSR twice? The link status bit is a latching bit. If
you read the register once and it shows no link status, that only means
that at some point since you previously read the register, link was
lost. It says nothing about the current status of link. The only way
to find out the current status of link is to read the register twice.
The first read clears the latch, and the second read reports the current
status. This is not specific to the Broadcom chips. It is standard
across all PHYs.
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