gwj / at91sam9263 · Commits

Commit 7e57f0493a661e57c5a2572a8818d35267482922

Authored by Jason Wessel
Committed by Anthony Liguori
1 parent 0928a95f

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>
Inline Side-by-side
Showing 1 changed file with 10 additions and 2 deletions
hw/usb-serial.c
  View file @7e57f04
@@ -445,7 +445,15 @@ static int usb_serial_handle_data(USBDevice *dev, USBPacket *p) @@ -445,7 +445,15 @@ static int usb_serial_handle_data(USBDevice *dev, USBPacket *p)
445 } 445 }
446 *data++ = usb_get_modem_lines(s) | 1; 446 *data++ = usb_get_modem_lines(s) | 1;
447 /* We do not have the uart details */ 447 /* We do not have the uart details */
448 - *data++ = 0; 448 + /* handle serial break */
  449 + if (s->event_trigger && s->event_trigger & FTDI_BI) {
  450 + s->event_trigger &= ~FTDI_BI;
  451 + *data++ = FTDI_BI;
  452 + ret = 2;
  453 + break;
  454 + } else {
  455 + *data++ = 0;
  456 + }
449 len -= 2; 457 len -= 2;
450 if (len > s->recv_used) 458 if (len > s->recv_used)
451 len = s->recv_used; 459 len = s->recv_used;
@@ -505,7 +513,7 @@ static void usb_serial_event(void *opaque, int event) @@ -505,7 +513,7 @@ static void usb_serial_event(void *opaque, int event)
505 513
506 switch (event) { 514 switch (event) {
507 case CHR_EVENT_BREAK: 515 case CHR_EVENT_BREAK:
508 - /* TODO: Send Break to USB */ 516 + s->event_trigger |= FTDI_BI;
509 break; 517 break;
510 case CHR_EVENT_FOCUS: 518 case CHR_EVENT_FOCUS:
511 break; 519 break;