> Date: Sat, 13 Aug 2016 23:06:45 +0200 > From: Marcus Glocker <mar...@nazgul.ch> > > When I currently boot the allwinner,sun5i-r8 board with an UART cable > connected for console but no terminal attached, the boot hangs as soon > the driver switches from the console output routines to interrupts. > > I figured out that this is caused because at one place we set the > FIFO RX interupt trigger to RXT2 (trigger on 1/2 full) instead of RXT0 > (trigger on 1 char). I guess it's a typo since everywhere else in the > driver it gets set to RXT0. > > When setting it to RXT0 (which is the reset value) the boot doesn't > hang anymore also when an UART cable is connected without a terminal > attached. > > ok?
Not sure if it is a typo, but if it fixes your issues, go ahead. > > Index: sxiuart.c > =================================================================== > RCS file: /cvs/src/sys/arch/armv7/sunxi/sxiuart.c,v > retrieving revision 1.12 > diff -u -p -r1.12 sxiuart.c > --- sxiuart.c 12 Aug 2016 16:09:37 -0000 1.12 > +++ sxiuart.c 13 Aug 2016 20:34:48 -0000 > @@ -660,7 +660,7 @@ sxiuartopen(dev_t dev, int flag, int mod > iot = sc->sc_iot; > ioh = sc->sc_ioh; > > - bus_space_write_1(iot, ioh, SXIUART_FCR, FIFOE | FIFO_RXT2); > + bus_space_write_1(iot, ioh, SXIUART_FCR, FIFOE | FIFO_RXT0); > delay(100); > while (ISSET(bus_space_read_1(iot, ioh, SXIUART_LSR), > LSR_RXRDY)) > >
