Hi,
I have wch ch382 board which is mostly similar to already supported
ch353 I think. But 382 works in PCI-E slot whereas 353 in PCI.
I've written a patch and LPT looks working with
parport_serial. (Actually it works even using "modprobe parport_pc
io=0xe100")
But I have some problems with ttyS*.
Here are changes between CH353-2S1P and CH382-2S1P in vendor driver:
CH353 CH382
type 16550 16750
IntrBar 3 0
IntrOffset 0x0F 0xE9
ofs1 0,0 0xC0,0xC8
As I understand last line is offset to uart I/O ports, so I put 0xC0
to pci_parport_serial_boards[].first_offset and uart_offset is 8, so
/sys/class/tty/ttyS0/port is 0xE0C0
/sys/class/tty/ttyS1/port is 0xE0C8
and lspci -v reports "I/O ports at e000 [size=256]"
But I cannot find where should I put interrupt parameters IntrBar and
IntrOffset. Probably this is the reason why ttyS* don't work.
Here is vendor WCH driver:
https://home.p5n.pp.ru/~sergej/files/wch-driver.tar.gz
My patch is in attachment.
Attachment:
wch-serial.diff
Description: Binary data
