Messages in this thread | | | From | Ernst Herzberg <> | Subject | Re: [BUG] pcmcia serial_cs no interrupts | Date | Wed, 14 Nov 2007 15:05:22 +0100 |
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Am Dienstag, 13. November 2007 18:52:01 schrieb Alan Cox: > On Tue, 13 Nov 2007 17:55:25 +0100 > > Ernst Herzberg <list-lkml@net4u.de> wrote: > > This pcmcia-card (UMTS Modem) only works if it shares his interrupt with > > another device, eg an usb mice. Moving the mice increases the connection > > speed, unplugging hangs the connection. > > Thats consistent with the card not generating interrupts, or the > interrupts being misrouted. The serial driver polls the interrupt pending > bits on the chip so the actual serial chip is clearly expecting > interrupts to go somewhere. Given this seems to be card not laptop > specific it looks like there is magic intiialisation gloop required by > this chipset that we don't have. > > > At the moment this card is my only way to reach the internet, but here in > > the hospital i have a lot time to test patches;) > > You may want to boot with irqpoll that may help a bit. > > Some info at: > > A helpful start would be to know if the setserial command (applied to > whatever tty your system calls the card) helps as given in: > > https://bugs.launchpad.net/ubuntu/+source/pcmciautils/+bug/99479
Thanks. So far i have checked:
2.6.15.X does not work. Same problen there: no shared irq, no umts (only to make shure..). Never will try an older kernel than 2.6.24 from now on;-)
The setserial command itself does not change anything. But the combination of irqpoll and "setserial /dev/modem baud_base 460800 spd_warp low_latency" allows the card to function on a lonesome interrupt even with usable speed.
But the card itself does not generate any interrupt at all during that time. /proc/interrupts counts up two on a physical insert of the card, one with a "pccardctl insert 0" or a physical remove, a "pccardctl eject 0" counts zero.
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