Locking: port_sem taken.
Interrupts: caller dependent.
+ flush_buffer(port)
+ Flush any write buffers, reset any DMA state and stop any
+ ongoing DMA transfers.
+
+ This will be called whenever the port->info->xmit circular
+ buffer is cleared.
+
+ Locking: port->lock taken.
+ Interrupts: locally disabled.
+ This call must not sleep
+
set_termios(port,termios,oldtermios)
Change the port parameters, including word length, parity, stop
bits. Update read_status_mask and ignore_status_mask to indicate
The interaction of the iflag bits is as follows (parity error
given as an example):
Parity error INPCK IGNPAR
- None n/a n/a character received
- Yes n/a 0 character discarded
- Yes 0 1 character received, marked as
+ n/a 0 n/a character received, marked as
+ TTY_NORMAL
+ None 1 n/a character received, marked as
TTY_NORMAL
- Yes 1 1 character received, marked as
+ Yes 1 0 character received, marked as
TTY_PARITY
+ Yes 1 1 character discarded
Other flags may be used (eg, xon/xoff characters) if your
hardware supports hardware "soft" flow control.