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hw/char/pl011: add support for sending break 

Break events are currently only handled by chardev/char-serial.c, so we
just ignore errors, which results in no behaviour change for other
chardevs.

Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
Message-id: 20210806144700.3751979-1-jlu@pengutronix.de
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Jan Luebbe 2021-08-06 16:47:00 +02:00 committed by Peter Maydell
parent dfa0d9b80e
commit d60af909d5
1 changed files with 6 additions and 0 deletions
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6
hw/char/pl011.c
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@ -26,6 +26,7 @@
#include "hw/qdev-properties-system.h"
#include "migration/vmstate.h"
#include "chardev/char-fe.h"
#include "chardev/char-serial.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "trace.h"
@ -231,6 +232,11 @@ static void pl011_write(void *opaque, hwaddr offset,
s->read_count = 0;
s->read_pos = 0;
}
if ((s->lcr ^ value) & 0x1) {
int break_enable = value & 0x1;
qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_SERIAL_SET_BREAK,
&break_enable);
}
s->lcr = value;
pl011_set_read_trigger(s);
break;