Accessing Device name, SOM, revision no and mac address using devmem

[neels]

Hello all,

The FSBL can read information regarding the Device name, SOM, revision number and Ethernet mac address
as shown below.

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--------------------------------------------------------------------------------
Xilinx First Stage Boot Loader (TE modified)
Release 2020.2  Apr 29 2021-13:46:07

Device IDCODE: 23727093
Device Name: 7z020 (7)
Device Revision: 2
--------------------------------------------------------------------------------
TE0720 TE_FsblHookBeforeHandoff_Custom

SoM: TE0720-03-1C  R SC REV:05
MAC: D8 80 39 4A 40 DE

--------------------------------------------------------------------------------


Is it possible to access the above information using register space using devmem  as shown below for a example address?
If not, how can I have the above information accessible to the PS side.

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root@dev:~# devmem 0xFFFFFC00
0xCAFEBABE


[JH]

Hi,
depends on which of the content you mean....

Device IDCODE: 23727093
Device Name: 7z020 (7)
Device Revision: 2

This information comes from Zynq register...see our FSBL code or Zynq TRM

SoM: TE0720-03-1C  R SC REV:05
MAC: D8 80 39 4A 40 DE

This information comes from our CPLD over MDIO interface. You can also read them with PHY tools in linux.
We have also a new CPLD Revision online and some more documentation how you get this infos with the new CPLD version:
https://wiki.trenz-electronic.de/display/PD/TE0720+CPLD
br
John

[neels]

Thanks a lot John. That was useful information.
Just a couple more question.

I am currently having TE0720-03-1QF module and when I use phytool to inspect the register 3 and register 4

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root@dev:/opt# ./phytool read eth0/0x1A/3
0x0c10
root@dev:/opt# ./phytool read eth0/0x1A/4
0x7005


and then decode the SOM, REV, pcb_rev, speed_grade, temp_grade, model based on the above value using the example code given in zynq_fsbl/te_fsbl_hooks.c

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    // register 3
    int rval3= 0x0c10;
    int pcb_rev, speed_grade, temp_grade, model;
    pcb_rev = (rval3 >>10) & 0x7;

    // register 4
    int rval4= 0x7005;

   /* 0=C, 1=E, 2=I, 3=A */
   speed_grade = (rval4 >> 12) & 3;
   temp_grade = 0x43;
   if ((rval4 & 0x3000)==0x1000) { temp_grade = 0x45; }
   if ((rval4 & 0x3000)==0x2000) { temp_grade = 0x49; }
   if ((rval4 & 0x3000)==0x3000) { temp_grade = 0x41; }
   model = ((rval4 & 0xF00)==0) ? 0x46 : 0x52;

   printf("\n\rSoM: TE0720-0%d-%d%c%c SC REV:%02x", pcb_rev, speed_grade, temp_grade, model, rval4 & 0xFF);



I get the following result

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SoM: TE0720-03-3AF SC REV:05


Which seems to mis-match with the original Vendor Part number that is TE0720-03-1QF.
The temperature grade and the model seems to mismatch. Moreover, there is no entry for the device with a temperature grade Q,
the code only seems to have C,E,I,A . Unless A -> Automotive maps to Q ?
Can you please clarify the above.

Thanks,
Neels

[JH]

Hi,
yes for old modules A --> automotive for Q Variant.
you can rename it to Q if you want, but we have updated our CPLD Firmware. And for Systemcontroller CPLD Firmware Revision 07 or newer. Now new encoding is used --> We have changed our article name style and old encoding was not longer possible for CPLD ---> to much variants of CPLD files only to change the name...new FSBL which also encodes new cpld firmware will be released with the next reference design update.

All changes, see: https://wiki.trenz-electronic.de/display/PD/TE0720+CPLD#TE0720CPLD-RevisionChanges

br
John

[neels]

Thanks John,

I shall look forward to the next release and possibly reprogram the CPLD once it is available.

regards,
Neels

[JH]

Hi,
CPLD is public:
https://wiki.trenz-electronic.de/display/PD/TE0720+CPLD
https://shop.trenz-electronic.de/de/Download/?path=Trenz_Electronic/Modules_and_Module_Carriers/4x5/TE0720/REV04/Firmware

FSBL code will be updated in one of the next releases.

TE0720 specific part of the FSBL to encode new content:

Code Select Expand


      /*
       * Decode SoM model and version information!
     */
    // Read register 3
    Status = XEmacPs_PhyRead(&Emac, 0x1A,  3, &rval16); if(Status != XST_SUCCESS){ return XST_FAILURE; }
    pcb_rev = (rval16 >>10) & 0x7;

    // Read register 4
    Status = XEmacPs_PhyRead(&Emac, 0x1A,  4, &rval16); if(Status != XST_SUCCESS){ return XST_FAILURE; }

    cpld_rev = (rval16 & 0x00FF);
    if (cpld_rev <= 6)
    {
        speed_grade = (rval16 >> 14) & 3;
        /* 0=C, 1=E, 2=I, 3=A */
        if ((rval16 & 0x3000)==0x0000) { temp_grade = 0x43; }
        else if ((rval16 & 0x3000)==0x1000) { temp_grade = 0x45; }
        else if ((rval16 & 0x3000)==0x2000) { temp_grade = 0x49; }
        else if ((rval16 & 0x3000)==0x3000) { temp_grade = 0x41; }
        else { temp_grade = 0x20; }

        if ((rval16 & 0x0F00)==0x000) { model1 = 0x20;model2 = 0x20;model3 = 0x46; }
        else if ((rval16 & 0x0F00)==0x100) { model1 = 0x20;model2 = 0x20;model3 = 0x52; }
        else if ((rval16 & 0x0F00)==0x200) { model1 = 0x20;model2 = 0x4C;model3 = 0x46; }
        else if ((rval16 & 0x0F00)==0x300) { model1 = 0x31;model2 = 0x34;model3 = 0x53; }
        else { model1 = 0x31;model2 = 0x31;model3 = 0x31; }


        xil_printf("\n\rSoM: TE0720-0%d-%d%c%c%c%c SC REV:%02x", pcb_rev, speed_grade, temp_grade, model1, model2, model3, rval16 & 0xFF);
        xil_printf("\n\rMAC: ");

        for(i = 0; i < 6; i++) {
        xil_printf("%02x ", mac_addr[i]);
        }
        xil_printf("\n\r");
    }
    else
    {
        Status = XEmacPs_PhyRead(&Emac, 0x1A,  4, &rval16); if(Status != XST_SUCCESS){ return XST_FAILURE; }
        wdt = (rval16 >> 14) & 0x3;
        if (wdt == 0b00)
        {
            wdt_status = "Deactive";
        }else if (wdt == 0b01)
        {
            wdt_status = "Hardware_WDT";
        }else if (wdt == 0b10)
        {
            wdt_status = "Software_WDT";
        }else if (wdt == 0b11)
        {
            wdt_status = "No WDT chip on the board. SOftware_WDT with PL clock";
        }
       
       
       
        boot_gen = (rval16 >> 12) & 0x3;
        if (boot_gen == 0b00)
        {
            bootmode_gen = "QSPI/SD";
        }else if (boot_gen == 0b01)
        {
            bootmode_gen = "QSPI/JTAG";
        }else if (boot_gen == 0b10)
        {
            bootmode_gen = "JTAG/SD";
        }else if (boot_gen == 0b11)
        {
            bootmode_gen = "default QSPI/JTAG/SD";
        }else
        {
            bootmode_gen = "undefined";
        }


        pudc = (rval16 >> 11) & 0x1;
        if (pudc==1)
        {
            pudc_mode = "Pulldown";
        } else
        {
            pudc_mode = "Pullup";
        }


        Status = XEmacPs_PhyRead(&Emac, 0x1A,  4, &rval16); if(Status != XST_SUCCESS){ return XST_FAILURE; }
        cpld_bm = (rval16 >> 10)& 0x01;
        if (cpld_bm == 0)
        {
            cpld_bootmode = "Deactive";
            // Read register 4
            Status = XEmacPs_PhyRead(&Emac, 0x1A,  4, &rval16); if(Status != XST_SUCCESS){ return XST_FAILURE; }
            boot = (rval16 >> 8) & 0x3;
            if (boot == 0b00)
            {
                boot_mode = "JTAG";
            }
            else if (boot == 0b10)
            {           
                boot_mode = "QSPI";
            }
            else if (boot == 0b11)
            {
                boot_mode = "SD Card";
            }
            else if (boot == 0b01)
            {
                boot_mode = "undefined";               
            }
            // xil_printf("\n\rSoM: TE0720 CPLD_BM=%s(%x) BOOTMOD_GEN=%x(%s) PUDC_MODE=%s(%d) BOOT_MODE=%s(%x) CPLD_REV=%02x", cpld_bootmode, cpld_bm, boot_gen, bootmode_gen, pudc_mode, pudc, boot_mode, boot, cpld_rev);
            // xil_printf("\n\rSoM: TE0720 WDT_STATUS=%s(%x) CPLD_BM=%s(%x) BOOTMOD_GEN=%x(%s) PUDC_MODE=%s(%d) BOOT_MODE=%s(%x) CPLD_REV=%02x", wdt_status, wdt, cpld_bootmode, cpld_bm, boot_gen, bootmode_gen, pudc_mode, pudc, boot_mode, boot, cpld_rev);
            xil_printf("\n\rCPLD_REV=%02x\n\r",cpld_rev);
            xil_printf("\n\rWDT_STATUS=%s(%x)\n\r", wdt_status,wdt);
            xil_printf("\n\rCPLD_BM=%s(%x)\n\r",cpld_bootmode, cpld_bm);
            xil_printf("\n\rBOOTMOD_GEN=%x(%s)\n\r", boot_gen, bootmode_gen);
            xil_printf("\n\rPUDC_MODE=%s(%d)\n\r", pudc_mode, pudc);
            xil_printf("\n\rBOOT_MODE=%s(%x)\n\r", boot_mode, boot);       
        } else
        {
            cpld_bootmode="Active";
            // Read register 12 (CR4[15:8])
            Status = XEmacPs_PhyRead(&Emac, 0x1A,  12, &rval16); if(Status != XST_SUCCESS){ return XST_FAILURE; }   
            boot = (rval16 >> 8) & 0x3;
            if (boot == 0b01)
            {
                boot_mode = "JTAG";
            }
            else if (boot == 0b10)
            {           
                boot_mode = "QSPI";
            }
            else if (boot == 0b11)
            {
                boot_mode = "SD Card";
            }
            else if (boot == 0b00)
            {
                boot_mode = "undefined";               
            }               
            // xil_printf("\n\rSoM: TE0720 CPLD_BM=%s(%x) BOOTMOD_GEN=%x(%s) PUDC_MODE=%s(%d) BOOT_MODE=%s(%x) CPLD_REV=%02x", cpld_bootmode, cpld_bm, boot_gen, bootmode_gen, pudc_mode, pudc, boot_mode, boot, cpld_rev);
            // xil_printf("\n\rSoM: TE0720 WDT_STATUS=%s(%x) CPLD_BM=%s(%x) BOOTMOD_GEN=%x(%s) PUDC_MODE=%s(%d) BOOT_MODE=%s(%x) CPLD_REV=%02x", wdt_status, wdt, cpld_bootmode, cpld_bm, boot_gen, bootmode_gen, pudc_mode, pudc, boot_mode, boot, cpld_rev);
            xil_printf("\n\rCPLD_REV=%02x\n\r",cpld_rev);
            xil_printf("\n\rWDT_STATUS=%s(%x)\n\r", wdt_status,wdt);
            xil_printf("\n\rCPLD_BM=%s(%x)\n\r",cpld_bootmode, cpld_bm);
            xil_printf("\n\rBOOTMOD_GEN=%x(%s)\n\r", boot_gen, bootmode_gen);
            xil_printf("\n\rPUDC_MODE=%s(%d)\n\r", pudc_mode, pudc);
            xil_printf("\n\rBOOT_MODE=%s(%x)\n\r", boot_mode, boot);
        }
                   
        xil_printf("\n\rMAC: ");
   
        for(i = 0; i < 6; i++) {
          xil_printf("%02x ", mac_addr[i]);
        }
        xil_printf("\n\r");
    }



br
John