[MinnowBoard] UART and COM ports problem

[Anteja Vuk Macek]

Hello,



I tried with IOCTL, but problem was I couldn't  open driver file with
CreateFile method because I couldn't find path ( something like this
\\\\.\\PCI#VEN_8086&DEV_0F0E&SUBSYS_72708086&REV_0C#3&11583659&0&F5#{badc33d6-be37-4372-b90e-bbf2d986b0eb}
). For UART I have iaiouart.sys driver and I want to know if this driver
return SerCx framework. I find for Windows 8 UART driver ( uart16550pc.sys
), but  I don't know if I need some kind of bridge driver between two
drivers.

Best regards,

Anteja

>On Tue, Jun 30, 2015 at 7:33 AM, Anteja Vuk Macek <anteja.vm at dolotron.com>
wrote:

> >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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