On Thu, 7 May 2020, jasper.low...@bt.com wrote:
I've started work on emulating the SAB 82532 ESSC2 but it's unfortunately way more complex than than the 16550A. For instance, it's
I don't know anything about this chip so don't know if it helps but if it's any way similar to ESCC (and the ESCC2 name is not just marketing) then there's some emulation of that in hw/char/escc.c that you may want to look at.
possible to configure different baudrates for receiving and transmitting. QEMU's chardev interface doesn't appear to handle that. QEMUSerialSetParams has a single speed value that is passed to cfsetispeed and cfsetospeed. The chip also has support for stick parity , which aren't valid options right now either. If I'm wrong on either of those points please correct me. Unless there is an alternative, changes to the interface may need to be made if adding this device is to be considered.
Maybe you can get away with setting these to the values the driver would set and hard coding it for now just to get some output. Then you can ignore the corresponding registers which could simplify initial device model.
Regards, BALATON Zoltan
