[Linux-parport] Negotiating IEEE1284_MODE_EPP

[Gerhard Bertelsmann]

Hello,

I'm having a problem to negotiate EPP mode for parport.
I've done this with ppdev in user mode with no problem using
ppdev:

  mode = IEEE1284_MODE_EPP;
  negotiate_first=0;
  if (negotiate_first)
  {
    ioctl (pport, PPNEGOT, &mode);
  } else
  {
    ioctl (pport, PPSETMODE, &mode);
  }

that's working but the parport modul is driving me crazy (I'm sure I've 
missed something :-():

  pdev = parport_register_device(port, "PCF8584 EPP",
    NULL, NULL, NULL, PARPORT_FLAG_EXCL, NULL);
  if (!pdev)
  {
    printk(KERN_ERR "Unable to register with parport\n");
    goto ERROR0;
  }

  if (parport_claim_or_block(pdev) < 0) {
    printk(KERN_ERR "Could not claim parallel port\n");
    goto ERROR1;
  }

  printk(KERN_ALERT "parport capabilities (0x%x)\n", pdev->port->modes);
  value=parport_negotiate(pdev->port, IEEE1284_MODE_EPP);
  if (value)
  {
    printk(KERN_ALERT "negotiation failed: %d (0x%x)\n", 
value,pdev->port->modes);
  }

dmesg output:

pcf8584-parport: attaching to parport0
parport capabilities (0x4)
negotiation failed: -1 (0x4)

Could someone give me a hint what's missing ?

Regards

Gerd

BTW:
parport0: PC-style at 0x378 [PCSPP,TRISTATE,EPP]
parport_pc: Via 686A parallel port: io=0x378
modul lp unloaded