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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: Jason Wessel <jason.wessel@windriver.com>
This commit is contained in:
Jason Wessel 2009-05-18 10:00:26 -05:00 committed by Anthony Liguori
parent 0928a95ffe
commit 7e57f0493a
1 changed files with 10 additions and 2 deletions
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12
hw/usb-serial.c
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@ -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;
break;
} 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) {
case CHR_EVENT_BREAK:
/* TODO: Send Break to USB */
s->event_trigger |= FTDI_BI;
break;
case CHR_EVENT_FOCUS:
break;