wct4xxp: __t4_frame_in and __t4_framer_out slowdowns.

This is a partial revert of r10234 "wct4xxp: __t4_framer_in and
__t4_framer_out speedups."

There were some platform + firmware version combinations that would fail to
properly configure the framer with the aforementioned speedups. The originally
reported sympton was that interrupts would fail to start and while
troubleshooting I also saw cases where one of the spans would stay in alarm
after starting. By adding in additional reads to the version register, the
overall process of writing / reading from the framer control registers is
slowed down which increases reliability.

This change does *not* affect the main path of TDM data which is DMAed
directly into buffers in host memory and are not read / written to / from
framer registers directly.

Reported-and-Tested-by: Vahan Yerkanian <vahan@arminco.com>
Signed-off-by: Shaun Ruffell <sruffell@digium.com>

Origin: http://svnview.digium.com/svn/dahdi?view=rev&rev=10559

git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/branches/2.6@10565 a0bf4364-ded3-4de4-8d8a-66a801d63aff

0 files changed, 0 insertions, 0 deletions