serial rxerr

[Andy Green]

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Somebody in the thread at some point said:

|> But, we should have "Auto flow control" on GSM modem port (RTS / CTS
|> operation in hardware according to FIFO level).
|>
|> It means we should be immune from overrun totally.
|>
|> The status register on failure reports RX overrun though... that seems
|> to be the big clue.
| static void s3c24xx_serial_set_mctrl(struct uart_port *port, unsigned
| int mctrl)
| {
|        /* todo - possibly remove AFC and do manual CTS */
| }

I don't think it's relevant... this is what sets AFC.

Also the one we're interested in is RTS I think.

static void s3c24xx_serial_set_termios(struct uart_port *port,
~                                       struct ktermios *termios,
~                                       struct ktermios *old)
...


~        umcon = (termios->c_cflag & CRTSCTS) ? S3C2410_UMCOM_AFC : 0;
...

~        dbg("setting ulcon to %08x, brddiv to %d, udivslot %08x\n",
~            ulcon, quot, udivslot);

~        wr_regl(port, S3C2410_ULCON, ulcon);
~        wr_regl(port, S3C2410_UBRDIV, quot);
~        wr_regl(port, S3C2410_UMCON, umcon);

I'll compile it with debug set and see if there's anything obvious.

- -Andy
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