aditional parallel port problems

Hi everybody!

Firstable, I have to say that my problem is a
Hardware problem, so, if you think this is not the proper forum,tell me please.

My situation is like this: I have a "hand-made"
circuit that works with the orders of a parallel port from PC. With this orders, the circuit turn on/off several devices connected to it.

I work with a PC with Suse9.0 (kernel
2.4.21-226-default) with an aditional parallel port in a PCI Multio I/O card with NM9835CV chip.

Besides, I have a C program that send (outb, iopl,
ioperm...)the orders to the address of the parallel port I say.

My problem is: when I run this C program with the
motherboard paralell port (lp0) the circuit works properly. But, it doesnt work with the aditional parallel port of the card (lp1)

I write in this list because I have changed de
operating system some days ago. I had RedHat6.2 (kernel 2.2) and everything worked perfectly with the same card. I have bought other cards but nothing.

I have seen some things:

1. With de PC TURNED ON and TURNED OFF, if I conect
the circuit with the motherboard parallel port (lp0) some devices turn on and other turn off. But when if connect the circuit with the parallel port of the card (lp1) different devices turn on/off. All of this happens without executing eny program, only connecting the ports and the circuit with a bus.
It seems to be the internal circuits of eacb port. Could it be the cause that nothing works? in this
case...how can I change that?

2. The card is "Multi-mode (SPP, EPP, ECP, PS2)". Is
possible that the circuit only works with SPP mode. I can change the motherboard parallel port mode (with BIOS) but , how can I change the parallel port mode of the card?

3. Before all this, I have tested the parallel port
address of the card and the irq of the slot and I have added to /etc/modules.conf the line:
"options parport_pc io=0x378,0x8800 irq=7,5"
Later, I have connected a printer to the
pararallel port of the card and it prints right.
Could the printer force the parallel port of the
card to change its own mode to ECP or EPP? If I connect a SPP device, could it force that port to change its mode to SPP and everything works?

4. I have changed the slot of the card and nothing
happens.

5. The command "dmesg | grep parport" displays:

    "parport0: PC-style at 0x378 irq 7 [PCSPP,
TRISTATE, EPP]" (Is this line telling me the mode of
the parallel port?? in this case...what does it mean?)
    "parport1: PC-style at 0x8800 irq 5 [PCSPP,

TRISTATE, EPP]"
"lp0: using parport0 (interrupt-driven)" "lp1: using parport1 (polling)"

6. I have seen in this mailing list an email about
two patches (00_parport and 01_netmos) to work with this kind of chips. I have never installed patches and I dont find help about it. I am not so sure that this patches are the solution of my problem

This is the end of my "little" email.
Thank you very much!!

Eva

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Hi Eva :)

* Eva Dominguez <[email protected]> dixit:

Here I have many VIA chipset PC's, and all of them show the same
problem: the SPP and EPP modes are detected (but only if I give the proper options, otherwise only SPP works), and ECP is not detected. The problem is longer to explain properly, but that's more or less.

I cannot help you (by now...), but I'm trying to isolate and
solve my problem with the help of Dino Klein, and as soon as I have something, I can contact you.

Anyway, your card seems to be 'moded' through software, am I
wrong?, so maybe it should work providing in the module options the io_hi value for the card, so the ECR registers are accessed and you get ECP. Devices connected to the port shouldn't (IMHO) set the mode on the port...

Raúl Núñez de Arenas Coronado

Linux Registered User 88736
http://www.pleyades.net & http://raul.pleyades.net/

Thanks! you have helped me a lot! I havent solved my problem yet, but I am not so lost than before :)

i would like it so much.

Reading the documentation of the chip NM9835 I have
seen that bits 7,6,5 of ERP has to be 0 to get a SPP mode. But ... i dont know the values for the rest of bits..so I suppose you are saying that i have to write it:

options parport_pc io=0x378,0x8800 io_hi=0x778,0xNNN
irq=7,5

NNN: io_hi value for the card....how can I get this
value? you know?

Thanks a lot again!
Eva

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