[MinnowBoard] UART and COM ports problem

[Anteja Vuk Macek]

Hi Ivan,

Thank you for advice, but I want two COM ports.  I found  LPC_DEV.ASL
ACPI_table  in Vlv2TbltDeviceRefCodePkg where was ASL code for the device
IUR3  HID - PNP0501.

Device(IUR3) // Internal UART
{
  Name(_HID, EISAID("PNP0501"))

  Name(_UID,1)

  // Status Method for internal UART

  Method(_STA,0,Serialized)
  {
    // Only report resources to the OS if internal UART is
    // not set to Disabled in BIOS Setup.

    If(LEqual(USEL,0))
    {
      If(LEqual(PU1E,1))
      {
        Store(1,UI3E) // Enable IRQ3 for UART
        Store(1,UI4E) // Enable IRQ4 for UART
        Store(1,C1EN) // Enable UART
        Return(0x000F)
      }
    }

    Return(0x0000)
  }

  // Disable Method for internal UART

  Method(_DIS,0,Serialized)
  {
    Store(0,UI3E)
    Store(0,UI4E)
    Store(0,C1EN)
  }

  // Current Resource Setting Method for internal UART

  Method(_CRS,0,Serialized)
  {
    // Create the Buffer that stores the Resources to
    // be returned.

    Name(BUF0,ResourceTemplate()
    {
      IO(Decode16,0x03F8,0x03F8,0x01,0x08)
      IRQNoFlags() {3}
    })

    Name(BUF1,ResourceTemplate()
    {
      IO(Decode16,0x03F8,0x03F8,0x01,0x08)
      IRQNoFlags() {4}
    })

    If (LLessEqual(SRID, 0x04))
    {
      Return(BUF0)
    } Else
    {
      Return(BUF1)
    }
  }
}

I want to make second IUR device.  I don't know value of variables : SEL,
PU1E, UI3E, UI4E and C1EN  and where it was defined.  Also,  I would like
to know what I need to change to write ASL code for second IURx device.
Best regards,

Anteja

>On Thu, Jun 25, 2015 at 11:16 AM, Rouzanov, Ivan <ivan.rouzanov at intel.com>
wrote:

> >Anteja,
> >
> >As far as I understand we have 2 UARTs but only one follows legacy
> COM-interface and the other one does not so Windows inbox driver serial.sys
> does not work with it so you only have one COM port.
> >(Basically COMx is just a symbolic link serial.sys creates to point to
> its device object, so if it does not service a device like in the case of
> the second HSUART, then it is not a COM-port).
> >f you need to use COM-port and have ability to debug, I'd suggest to use
> Ethernet for debugging and free up COM1 for your other needs.
> >
> >I hope this helps.
> >Best regards,
> >van Rouzanov.
> >
> >
> >
> >Message: 3
> >Date: Wed, 24 Jun 2015 10:06:02 +0200
> >From: Anteja Vuk Macek <anteja.vm at dolotron.com>
> >To: EDK2 email list <edk2-devel at lists.sourceforge.net>,  MinnowMax
> >       Community <elinux-minnowboard at lists.elinux.org>
> >Subject: [MinnowBoard] UART and COM ports problem
> >Message-ID:
> >       <
> CAOPTR2BQg0h5KT8dogxr60t3++i4tCHPFchyo6qWqKYkqGWZhw at mail.gmail.com>
> >Content-Type: text/plain; charset="utf-8"
> >
> >Hi all,
> >
> >On MinnowMax I work  on Windows 8.1 with UART.
> > In BIOS Setup I enable UART.   In  LSS & SCC Configuration menu in BIOS
> >Setup I enable : LSS HSUART #1 Support  , LSS HSUART #1 FlowCtrl  , LSS
> HSUART #2 Support  , and LSS HSUART #2 FlowCtrl .  But I don't know if I
> need to in BIOS Setup in Miscellaneous configuration  set  UART >interface
> on  Super IO UART, for now I set  Internal UART for UART interface.
> >I install Intel driver (
> >
> https://downloadcenter.intel.com/download/24228/Intel-embedded-drivers-for-Windows-8-1-32-bit-
> >)
> >and I got two UART controllers.
> >
> >Problem :
> >Problem is that I have only one COM port ( COM1)  and it is for
> debugging.  I looking in inf (iaiouart.inf ) file of driver for which
> device is , and I find APCI/INT33BC device.  The COM1 is device
> >APCI/PNP0501 .
> >
> >What I need to do to get COM 2 device ?  I saw  BaseSerialPortLib 16550
> module in  MdeModulePkg/Library for what it is this module.  Need I add
> some module for UART or Serial port in fdf (PlatformPkg.fdf ) file to get
> >COM2 device, or add  COM2  in ACPI_table? Where I can find ACPI_table in
> source of firmware?
> >
> >Best regards,
> >
> >Anteja
> >
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