Messages in this thread | | | Date | Sun, 26 Apr 1998 21:52:43 +0100 (WEST) | From | "Manuel J. Galan" <> | Subject | Re: Update to the serial driver (IRQ detect) |
| |
-----BEGIN PGP SIGNED MESSAGE-----
The 'udelay(1) -> udelay(10)' change solved it!!! :-)
I've not been able to reply you before because of the io_apic floppy issue with 2.1.98, now that I can boot again...
from `/var/log/kernlog' - ---------------------------------------------- Serial driver version 4.25 with DETECT_IRQ enabled ttyS00 at 0x03f8 (irq = 4) is a 16550A ttyS02 at 0x03e8 (irq = 3) is a ST16650V2 ttyS03 at 0x02e8 (irq = 11) is a ST16650V2 - ----------------------------------------------
On 22-Apr-98 Etienne Lorrain wrote: > Hi, > >> > I would like to see the content of /proc/stats (line "intr") after >> > a false detection (ttyS0 and ttyS2 IRQ at zero) just after boot / >> > login. It display the number of IRQ which have append whether or >> > not there is a driver for them in the order "total, irq0, ...irq15, >> > irqapics" >> > >> Found old kernel! >> >> On booting: >> - ------------------------ >> Serial driver version 4.25 with DETECT_IRQ enabled >> ttyS00 at 0x03f8 (irq = 0) is a 16550A >> ttyS02 at 0x03e8 (irq = 0) is a ST16650V2 >> ttyS03 at 0x02e8 (irq = 11) is a ST16650V2 >> - ------------------------ > > Considering also : >> intr 55579 38380 2411 0 3 2944 2 3 1 1 11366 0 368 0 4 85 11 0 ... >> total irq0 irq1 2 3 4 5 6 7 8 irq9 ... > > At least IRQ 3 appeared, I think the problem should > be solved by applying this hand-edited patch > to serial.c in function "detect_uart_irq()": > > serial_outp(&scr_info, UART_MCR, UART_MCR_OUT1 | UART_MCR_OUT2); > irqs = probe_irq_on(); > serial_outp(&scr_info, UART_MCR, 0); > - udelay (1); > + udelay (10); > irq = probe_irq_off(irqs); > > That is increasing the delay to 10 or 100. > If you have time, could you please report success/failure. > >> After setserial: >> ================================ >> ${SETSERIAL} /dev/ttyS0 irq 4 autoconfig >> #${SETSERIAL} /dev/ttyS1 auto_irq autoconfig >> ${SETSERIAL} /dev/ttyS2 irq 3 autoconfig > > I think I get it: auto_irq is set by default! > Previous command is trying to autodetect irq after setting it > to 3... This will work (I hope): > ${SETSERIAL} /dev/ttyS2 ^auto_irq irq 3 autoconfig > >> ${SETSERIAL} /dev/ttyS3 irq 11 autoconfig baud_base 460800 >> ================================ >> >> - ---------------------------------- >> root@mgmux(5)[/etc/rc.d]# setserial -g /dev/ttyS0 >> /dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4 >> root@mgmux(6)[/etc/rc.d]# setserial -g /dev/ttyS1 >> /dev/ttyS1, UART: unknown, Port: 0x02f8, IRQ: 3 ( ??? does not exist) > > This is how non present UART are reported, normal. > >> root@mgmux(7)[/etc/rc.d]# setserial -g /dev/ttyS2 >> /dev/ttyS2, UART: 16650V2, Port: 0x03e8, IRQ: 0 ( wrong !!!) >> root@mgmux(8)[/etc/rc.d]# setserial -g /dev/ttyS3 >> /dev/ttyS3, UART: 16650V2, Port: 0x02e8, IRQ: 11 >> - ---------------------------------- > ----------- etienne.lorrain@ibm.net > -- hdc: irq timeout: status=0xd0 { Busy } > -- ide1: reset: success > ----------> I like Linux !
- -- Manuel J. Galan manolow@step.es
-----BEGIN PGP SIGNATURE----- Version: PGPfreeware 5.0i for non-commercial use Comment: Using RSA Key Charset: noconv
iQEVAwUBNUOemmD+APAfXUYjAQEr9AgAydH09xPOGuRIElK1CGsNVtOUa+/DNUCR FVUo4Kwj5Gj6j425vFxaUAw66UafGX51kPW4v2GPmgyOR1a/L3+Rzy3p0hLED53O JdHhDuhpLo6IVHTPkPxf22MV9J1kW9+7U0gKGBzoygBqAPfC7rPLkFNnR8/KIYBf ZPMDnPohYr/TYc3mZBnLSVYSM1AzqY8Ybf1aXOeT5rE4iQ1i8YZNJppfycEUGOt6 fwFmtyL5hgsC1oOjOihpGjBuXq8/mP9hDnhtpm72xmn6Cukb/Zhb0f1AMil4vI/N VQIWjR0obP5/9ixQRVT/PLBhbIph9ZwgbamR/kcDSNL1Y2WWXIylfA== =Rmci -----END PGP SIGNATURE-----
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu
| |