| commit | c29cd47e82df0bc7385cdd49a158d838314daa9e | |
| author | Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> | |
| Thu, 18 Nov 2021 18:18:34 +0000 (18 18:18 +0000) | ||
| committer | Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> | |
| Sun, 21 Nov 2021 09:56:52 +0000 (21 09:56 +0000) | ||
| tree | e17b19d26b3694212bc4babee384ba119053e968 | treesnapshot (tar.gz zip) |
| parent | 8627edfb3f1fca24a96a0954148885c3241c10f8 | commitdiff |
escc: always set STATUS_TXEMPTY in R_STATUS on device reset
The "Transmit Interrupts and Transmit Buffer Empty Bit" section of the ESCC
datasheet states the following about the STATUS_TXEMPTY bit: "After a hardware
reset (including a hardware reset by software), or a channel reset, this bit
is set to 1".
Update escc_reset() to set the STATUS_TXEMPTY bit in the R_STATUS register
on device reset as described which fixes a regression whereby the Sun PROM
checks this bit early on startup and gets stuck in an infinite loop if it is
not set.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-Id: <20211118181835.18497-2-mark.cave-ayland@ilande.co.uk>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
The "Transmit Interrupts and Transmit Buffer Empty Bit" section of the ESCC
datasheet states the following about the STATUS_TXEMPTY bit: "After a hardware
reset (including a hardware reset by software), or a channel reset, this bit
is set to 1".
Update escc_reset() to set the STATUS_TXEMPTY bit in the R_STATUS register
on device reset as described which fixes a regression whereby the Sun PROM
checks this bit early on startup and gets stuck in an infinite loop if it is
not set.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-Id: <20211118181835.18497-2-mark.cave-ayland@ilande.co.uk>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
| hw/char/escc.c | diffblobblamehistory |