Hello all,
I am the developer of the ShipModul (CustomWare) MiniPlex products where
we use FTDI chips for USB communications.
I see that even the latest PID we use (FD4B) is already in the
ftdi_sio.c driver and I'm glad to see the Linux community picks this up
to fast.
There is one thing however that I'd like to see added to the driver and
that is fixed baud rates for our products. Since PID FD49 (the second
PID we assigned) we use fixed baudrates, so the user of our products
doesn't have to set the right baud rate in his application.
When browsing through the source code I found here
(http://lxr.free-electrons.com/source/drivers/usb/serial/ftdi_sio.c), I
found function
static __u32 get_ftdi_divisor(struct tty_struct *tty, struct
usb_serial_port *port)
where the devisor for a specific baud rate is set.
In the case at line 1323, where the FT232BM and similar chips are
handled, I see an if statement which obviously checks a few PID's to set
a fixed baud rate.
So it appears that it would be fairly easy to add a few other exceptions
for our PID's. Am I correct?
If so, the following code would do the trick for us:
switch (product_id)
{
case FTDI_CUSTOMWARE_MINIPLEX2_PID: baud = 57600; break;
case FTDI_CUSTOMWARE_MINIPLEX2WI_PID: baud = 115200; break;
case FTDI_CUSTOMWARE_MINIPLEX3_PID: baud = 460800; break;
}
Now, I'm not familiar with the process of getting something added to a
Linux driver so that's why I call for your help. Can you do this for me
or can you point me into the right direction to get this included?
Best regards,
Meindert
CustomWare/ShipModul
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