Commit 7e57f049 authored by Jason Wessel's avatar Jason Wessel Committed by Anthony Liguori
Browse files

usb-serial: implement break event.

Implement the serial break via usb serial.

The second data byte in ftdi status packet contains the break status.
The values were already defined in usb-serial.c so it was a matter of
making use of the event_trigger to form a urb to send over to the host
controller with the serial break status set.

This was tested against a linux development image which enables sysrq
via a serial break on the ftdi usb console.
Signed-off-by: default avatarJason Wessel <>
parent 0928a95f
......@@ -445,7 +445,15 @@ static int usb_serial_handle_data(USBDevice *dev, USBPacket *p)
*data++ = usb_get_modem_lines(s) | 1;
/* We do not have the uart details */
*data++ = 0;
/* handle serial break */
if (s->event_trigger && s->event_trigger & FTDI_BI) {
s->event_trigger &= ~FTDI_BI;
*data++ = FTDI_BI;
ret = 2;
} else {
*data++ = 0;
len -= 2;
if (len > s->recv_used)
len = s->recv_used;
......@@ -505,7 +513,7 @@ static void usb_serial_event(void *opaque, int event)
switch (event) {
/* TODO: Send Break to USB */
s->event_trigger |= FTDI_BI;
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