sio0/sio1 swap

From: Richard Williamson (richard.williamson_at_u4eatech.com)
Date: 11/30/04

  • Next message: Daan Vreeken [PA4DAN]: "Re: Wireless Card and SSID" 
    Date: Tue, 30 Nov 2004 10:54:00 +0000
To: freebsd-questions@freebsd.org

    Hello,

    I've got a network box. The motherboard (adlink 2000) has three
    "com" ports (that is what the screen print on the board says:
    com1, com2, com3.

    The box I was given for development has com1 wired up to the
    9pin port on the back of the housing, helpfully screen printed
    with 'COM1'. com2 is wired to a Densan 16x2 LCD front panel
    display.

    Development happened.

    Comes time for testing, and it turns out that the box I have
    is "miswired" vis-a-vis the sio ports. Every other box by
    this manufacturer is wired com1 -> LCD, com2 -> COM1.

    My kernel configuration had this:

    a) device sio0 at isa? port IO_COM1 flags 0x10 irq 4
    a) device sio1 at isa? port IO_COM2 irq 3
    a) device sio2 at isa? disable port IO_COM3 irq 5
    a) device sio3 at isa? disable port IO_COM4 irq 9

    So now I'm trying to swap the ports at the kernel level so that
    the LCD control characters and data which went to the mb port
    com2 (sio1) go to com2 (sio0), and the console output moves
    from com1 (sio0) to com1 (sio1).

    I've tried

    b) device sio0 at isa? port IO_COM2 irq 3
    b) device sio1 at isa? port IO_COM1 flags 0x10 irq 4
    b) device sio2 at isa? port IO_COM3 irq 5
    b) device sio3 at isa? disable port IO_COM4 irq 9

    and

    c) device sio0 at isa? port IO_COM2 irq 3
    c) device sio1 at isa? port IO_COM1 flags 0x30 irq 4
    c) device sio2 at isa? port IO_COM3 irq 5
    c) device sio3 at isa? disable port IO_COM4 irq 9

    The b) lines resulted in no console output (bad), but serial login on
    the 9pin COM1 housing port (good) but no LCD output (bad)

    the c) lines resulted in no console output, no serial login on
    COM1, and no LCD output (bad, bad, bad).

    Is this going to require more changes, elsewhere? And shouldn't
    the b (or c) lines do what I want (console output, serial login and
    LCD output)? Help?

    TIA,
    rip

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