Read USB messages arriving from the host into a queue. This makes it
less likely that USB "bulk out" packets will be NAK'ed on the USB bus,
which improves USB bus utilization.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
There is no need to heavily prioritize the sending of canbus packets
over USB. A single check to flush the incoming canbus packets is
sufficient.
Also, be sure to wake up canserial_notify_tx() even if canhw_send()
blocks.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The canserial code already advertizes a receive window, so the host
should never flood the canserial code. Remove the extra scheduling
checks to simplify the usb_canbus code.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
A buffer of only 8 canbus packets is only 64 bytes of data, which
could be exceeded if the usb-to-canbus mcu gets busy doing other work.
Increase the buffer to 32 packets.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Rename canserial_send() to canbus_send() and canserial_set_filter() to
canbus_set_filter(). This makes it more clear where the code should
reside.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Rename canbus_send() to canhw_send() and rename canbus_set_filter() to
canhw_set_filter(). This makes it more clear where the code should
reside.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
An mcu device acting as an "mcu bridge" should only be reset after
other normal devices are reset - otherwise the bridge wont be able to
pass along the reset message to the downstream mcus.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Support a USB interface that shows up as a canbus adapter to linux.
Route both local and real canbus packets over that interface.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
