imx28 serial port and mxs-auart.0: unhandled status 520080

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imx28 serial port and mxs-auart.0: unhandled status 520080

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FS1z
Contributor II

Hi All,

 

I'm sending and receiving data over the UART1 of an imx28evk.

 

After configuring the connected device it starts sending data continiously.

 

While receiving this data, there are read errors quite often.

 

The kernel logs a "mxs-auart mxs-auart.0: Unhandled status 520080" and sometime 520280.

 

Did anybody see that before and explain this to me?

 

Greetings,

F

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5 Replies

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CraigMcQueen
Contributor III

I am also interested to know about this. Looking at the driver code, this is generated from the AUART interrupt handler. Looking at the handler itself, it looks as though it doesn't handle any of:

  • overrun error
  • break error
  • parity error
  • framing error
  • automatic baud rate detect

However, overrun, break, parity and framing are dealt with in other parts of the code when processing received bytes. So I'm not sure what to make of it.

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victorien
Contributor IV

I had the same problem "mxs-auart mxs-auart.0: Unhandled status 520080".

To resolve it, I test different configuration of UART with the command stty ans the reception woks when the parity bit is active.

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ask
Contributor III

At parity level with any configuration like 'N','O' 'E' auar1 is working fine, but auar0 is not working. Dont know the reason. Please let me know if any one know.

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JasonVarbedian
Contributor I

Did you find a solution to this? I had the same problem.

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FS1z
Contributor II

Hi All,

 

so I took a look at /drivers/serial/mxs-auart.c and the error message is combined out of

0x400000 BM_UARTAPP_INTR_RTIEN

0x100000 BM_UARTAPP_INTR_RXIEN

0x20000   BM_UARTAPP_INTR_CTSMIEN

0x80        BM_UARTAPP_INTR_FEIS

Can anybody help me to decipher these messaged? What am I doing wrong?

Greetings,

F

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