i m facing problemes with a microcontroler based on ls1021a (it is the tqmls1021a-cc). We are trying to disable the SERDES module with the RCW using the ref manual. section 126.96.36.199.2.1 procedure.
PBL preamble and RCW header
0 32 64 92
0608000a 00000000 00000000 00000000
128 160 192 224
FF000000 00C07900 40025a00 21046000 (boot failures)
07000000 00007900 40025a00 21046000 ( with this configuration we boot. With any other one we don't)
256 288 320 352
00000000 00000000 00000000 000bc800
384 416 448 480 512
20124900 0004b340 00000000 00000000
Are we missing something in the procedure to disable the serdes module properly ?
We would like to use etsec2 has RGMII. But we think that the SERDES module initialize some register during power on reset to force the controller to be in SGMII. this is why we need to be able to turn the SERDES module off.
We are basing our hypotesis on this from the refenrence manual :
20.5.8 Ethernet control register (eTSECx_ECNTRL)
ECNTRL is a register writable by the user to configure and initialize the eTSEC. Note
that the FIFM, GMIIM, TBIM, RMM, and RPM fields are read-only, having been set
after sampling signals at power-on-reset
and also on the SERDES protocole documentation.
So far we don't know yet if its possbile to configure etsec2 properly for RGMII mode with the SERDES module powered on.
We are using QCVS to generate RCW.
thank you for your support.