My PL2303HX works at 500kbps after applying this patch.
I suppose that it could work at other non standard speeds since this fix
"correctly handle baudrates above 115200"
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/usb/serial/pl2303.c?id=8d48fdf689fed2c73c493e5146d1463689246442
came after this one
"fix baud rate handling in case of unsupported values"
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/usb/serial/pl2303.c?id=25b8286805e856c8c7fda127018e31032c918015
but I only can test it with 500000.
Patch made against mainline but tested with 3.4.45
Please CC me since I'm not subscribed
Signed-off-by: Luca Olivetti <[email protected]>
---
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 7151659..ca19b17 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -275,7 +275,7 @@ static void pl2303_set_termios(struct tty_struct *tty,
u8 control;
const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
4800, 7200, 9600, 14400, 19200, 28800, 38400,
- 57600, 115200, 230400, 460800, 614400,
+ 57600, 115200, 230400, 460800, 500000, 614400,
921600, 1228800, 2457600, 3000000, 6000000 };
int baud_floor, baud_ceil;
int k;