How to reset ( having reset control) PCIe device connected device over T1040RDB PCIe slot through the processor ?

mvgohil — Wed, 15 Jun 2016 19:45:41 GMT

Hello, I am using T1040 RDB evalution module and connected my PCIe card into it. Now In my debugging and driver application I need to reset the PCIe add on card. According to the schematics of T1040RDB A11 pin of PCIe connector is connected CPLD IO.

In my PCIe device card, I have connected that PCIe RST line coming from the PCIe connector to the various devices in my PCIe card.

I do not know if there is anyway to toggle that reset signal through the processor.

Please help me kno this.

Re: How to reset ( having reset control) PCIe device connected device over T1040RDB PCIe slot through the processor ?

r8070z — Thu, 16 Jun 2016 11:59:09 GMT

Have a great day,

There is 8-bit soft reset register RSTCON2 implemented in the CPLD (offset = 11h, CPLD base address = 0xffdf0000). RSTCON2 bit 5 controls that reset signal
PEX_RST
0: No reset occurs.
1: Writing logic 1 produces PCIe x4 slot reset# signal, this bit can auto clear.

This description is from the QorIQ T1040 Reference Design Board User Guide, Rev. 0, 06/2015 available on the NXP site

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How to reset ( having reset control) PCIe device connected device over T1040RDB PCIe slot through the processor ?

Re: How to reset ( having reset control) PCIe device connected device over T1040RDB PCIe slot through the processor ?