Linux + serial port
in [UK Linux]
|
Prev: World domination foiled again...
Next: Missing?
From: Martin Gregorie on 19 Dec 2008 19:54 On Fri, 19 Dec 2008 20:32:32 +0000, Gordon Henderson wrote: > In article <gigvf7$uj2$3(a)localhost.localdomain>, Martin Gregorie > <martin(a)see.sig.for.address.invalid> wrote: >>On Tue, 16 Dec 2008 07:17:53 +0000, Gordon Henderson wrote: >> >>> Stick one of these: >>> >>> http://linitx.com/viewproduct.php?prodid=11850 >>> >>> in the PCI slot. If it's longer than a normal PCI slot, it's a PCI-X >>> slot, but shorter cards should work just as well. See: >>> >>The card turned up today and has been duly stuck in the spare PCI slot >>as a 4 port setup - no spare holes in the back of the case for the 5th >>and 6th connectors. >> >>The card's S1 and S2 ports were recognised and assigned as ttyS2 and >>ttyS3 but anything else isn't being handled - dmesg sees the next pair >>of ports being spotted as a 16550A, then an error is thrown and thats >>it: >> >>0000:01:08.0: ttyS2 at I/O 0x74c8 (irq = 16) is a 16550A 0000:01:08.0: >>ttyS3 at I/O 0x74d0 (irq = 16) is a 16550A Couldn't register serial port >>0000:01:08.0: -28 >> >>So, now I have 4 serial ports working (two on the mobo and the first two >>on this card, but I'd like to get the next two working as well. Is there >>a HOWTO for this? >> >>The card came with a mini-CD containing relatively old drivers as C >>source but no documentation at all apart from short READMEs for the >>drivers. There's no indication on the box as to what model the card >>might be either, so without pulling the card out again and reading >>what's stencilled on it I'm unsure which driver might suit it. >> >>Is there a generic multi-port driver that comes with kernel 2.6.26 that >>I can use or should I compile one off the mini-CD? > > There is one in the kernel, and it defaults to 4 serial ports. > > So, you may need to re-compile the kernel to fix it, or if using > modules, there may be a module load option to increase the number. > Thanks, guys. I'm currently trying to stick with the standard kernel, so I added "8250.nr_uarts=6" to the boot parameters and the remaining two ports got configured. Still didn't work, though, until I inverted the flying lead plugs for the two off-card D-9s. No hint of which way up the connectors were meant to go, so of course I'd initially plugged 'em in upside down. I tested all four against the EW logger and all four now work as advertised.. Thanks again. -- martin@ | Martin Gregorie gregorie. | Essex, UK org | |