EPIA-M + second serial port enabler

[Niki Waibel]

i'd just like to confirm that the 2nd serial port on the epia-m
works if you do the modifications dave describes.
niki

On 09-Dec-2003 Dave Ashley wrote:
> In a previous email message
> http://www.clustermatic.org/pipermail/linuxbios/2003-November/005891.html
> 
> I wrote
> In V1 the file to modify is src/superio/via/vt1211/setup_serial.inc
> That code sets up ttyS0 which is the VT1211's logical device 2. You
> want to add some similiar code for logical device 3 to get ttyS1 working.
> 
> Assuming you want it to be at 2f8 you'd merge in these lines:
>       OUTPNPADDR($7)
>       OUTPNPDATA($3)
>       /* set the enable in reg. 0x30 */
>       OUTPNPADDR($0x30)
>       OUTPNPDATA($0x1)
> 
>       /* Serial Port 2 Base Address (BEh) */
>       OUTPNPADDR($0x60)
>       OUTPNPDATA($0xbe)
>       /* Serial Port 2 IRQ (03h) */
>       OUTPNPADDR($0x70)
>       OUTPNPDATA($0x3)
>       /* Serial Port 2 Control */
>       OUTPNPADDR($0xf0)
>       OUTPNPDATA($0x2)
> 
> ...then do the turn off pnp
>       /* turn off PnP */
>       OUTPNPADDR($0xaa)
> 
> ...then duplicate the serial setup except the address goes from 3f8 -> 2f8
> 
> 
> There is a piece missing. I had to enable the second serial port on the VT1211
> and although linux recognized it, there was no serial activity on the lines.
> 
> These lines need to be added during the vt1211 configuration:
> 
>       /* Allow serial port 2 (ldn 3) pins to come out */
>       OUTPNPADDR($0x27)
>       OUTPNPDATA($00)
> 
> This has to be before the $0xaa write to turn off configuration mode.
> 
> The default value on powerup for this register on the vt1211 is 0xff.
> There are multi purpose pins on the chip and this connects them to the second
> serial port.
> 
> -Dave