Dag Brattli <[EMAIL PROTECTED]> writes:
> Hi,
>
> Just want you to know that I now have the smc-ircc driver running at 4Mbps
> on a Dell laptop. Still needs some more hacking, but it looks really
> promising. Should be able to build a new patch tomorrow!
SMC driver update:
Can now survive ping -f and run xmatrix (xscreensaver) X-redirected to
another PC. The speed is very good and I have no problems at all. Have sent
over 400.000 frames now, so I think I'll put out a new patch later today
instead of tomorrow.
Changes I had to do to the smc-ircc driver to make it work:
o Add probing for the SMC FDC37N958. The driver now knows about the
FDC37C669, and the FDC37N958.
o The underrun condition was gives as iobase to the tx_complete function
and received as underrun ;-)
o Tx DMA wasn't disabled correctly
o Now uses demand mode DMA instead of single mode DMA
o Fixed the .h file. It contained a lot of entries which looked like this:
#define IRCC_IIR_ACTIVE_FRAME 1<<7
This is very dangerous if you ask me. The safe version is either 0x80 (as
I'm using, or (1<<7). Using the above macro, may evaluate to something
very unpredictable if combined with other code.
o Added spinlocks so it's SMP safe. This will also make sure that an
interrupt never occurs when the Tx function is called (then you would get
a register bank crashes)
o Fixed the Tx and Rx functions so they:
1) turn off chip DMA
2) setup DMA controller
3) enable chip dma
The original code missed 1)
o Removed a lot of debug functions which would crash the machine if you got
a too high speed (too many messages printet pr second).
TODO:
Better support for the IrCC 2.0 which can handle back-to-back frames. The
current code cannot handle this. I don't have access to the IrCC 2.0 chip,
so somebody else will have to do this job.
-- Dag
--
/ Dag Brattli | The Linux-IrDA Project /
// University of Tromsoe, Norway | Infrared communication for Linux //
/// http://www.cs.uit.no/~dagb | http://www.cs.uit.no/linux-irda/ ///
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