diff options
| author | Thomas Huth <huth@tuxfamily.org> | 2023-07-16 17:35:19 +0200 |
|---|---|---|
| committer | Philippe Mathieu-Daudé <philmd@linaro.org> | 2023-07-25 14:40:49 +0200 |
| commit | 02388b5925ff2411853bb69e449f1e5da76e12d4 (patch) | |
| tree | ca43919e4c6fb19ade49c25f735d70da04aaa4bd /hw/char | |
| parent | 5fc1a686607a40cbf0aa0b861dd8e9a642813a83 (diff) | |
hw/char/escc: Implement loopback mode
The firmware of the m68k next-cube machine uses the loopback mode
for self-testing the hardware and currently fails during this step.
By implementing the loopback mode, we can make the firmware pass
to the next step.
Signed-off-by: Thomas Huth <huth@tuxfamily.org>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230716153519.31722-1-huth@tuxfamily.org>
Diffstat (limited to 'hw/char')
| -rw-r--r-- | hw/char/escc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/hw/char/escc.c b/hw/char/escc.c index 4f3872bfe9..4be66053c1 100644 --- a/hw/char/escc.c +++ b/hw/char/escc.c @@ -653,7 +653,9 @@ static void escc_mem_write(void *opaque, hwaddr addr, escc_update_irq(s); s->tx = val; if (s->wregs[W_TXCTRL2] & TXCTRL2_TXEN) { /* tx enabled */ - if (qemu_chr_fe_backend_connected(&s->chr)) { + if (s->wregs[W_MISC2] & MISC2_LCL_LOOP) { + serial_receive_byte(s, s->tx); + } else if (qemu_chr_fe_backend_connected(&s->chr)) { /* * XXX this blocks entire thread. Rewrite to use * qemu_chr_fe_write and background I/O callbacks |