[PARPORT] parport problems with devfs

From: Nico Schottelius (nicos@pcsystems.de)
Date: Wed May 16 2001 - 09:19:02 EDT

  • Next message: Joern Larsen: "Re: [PARPORT] Debian 2.2 install from Backpack CD-ROM"

    Hello!

    I attached the problem occured with parport and devfs.
    I don't exactly know where the problem in the parport source
    is. If someone has a patch for it, I will test it.

    Nico


    # Loading the parport and parport_pc modules for my parallelport
    flapp:/home/user/nico/gpm-1.19.3 # modprobe parport_pc

    # is there an entry in /dev ?
    flapp:/home/user/nico/gpm-1.19.3 # ls /dev/
    . cdroms fb initctl mem ptmx root usb
    .. console full input misc pts shm vc
    .devfsd cpu gpmctl kmem null pty tty vcc
    apm_bios discs ide log port random urandom zero

    # What does the kernel message say ?
    flapp:/home/user/nico/gpm-1.19.3 # dmesg | tail -n 14
    usb.c: registered new driver hid
    mice: PS/2 mouse device common for all mice
    0x378: FIFO is 16 bytes
    0x378: writeIntrThreshold is 7
    0x378: readIntrThreshold is 7
    0x378: PWord is 8 bits
    0x378: Interrupts are ISA-Pulses
    0x378: ECP port cfgA=0x10 cfgB=0x49
    0x378: ECP settings irq=7 dma=1
    parport0: PC-style at 0x378 (0x778) [PCSPP,TRISTATE,COMPAT,ECP]
    parport0: cpp_daisy: aa5500ff(38)
    parport0: assign_addrs: aa5500ff(38)
    parport0: cpp_daisy: aa5500ff(38)
    parport0: assign_addrs: aa5500ff(38)

    # Have a look what lp0 has been before
    >From /usr/src/linux/Documentation/ :
      6 char Parallel printer devices
                      0 = /dev/lp0 Parallel printer on parport0
                      1 = /dev/lp1 Parallel printer on parport1

    # make our own device out of /dev
    flapp:/ # mknod /lp0 c 6 0

    # has anything happened ? No!
    flapp:/ # ls /dev/
    . cdroms fb initctl mem ptmx root usb
    .. console full input misc pts shm vc
    .devfsd cpu gpmctl kmem null pty tty vcc
    apm_bios discs ide log port random urandom zero

    # Use the printer the easiest way :)
    flapp:/ # cat /tmp/* > lp0

    # And now...
    flapp:/ # ls /dev/
    . cdroms fb initctl mem printers random urandom zero
    .. console full input misc ptmx root usb
    .devfsd cpu gpmctl kmem null pts shm vc
    apm_bios discs ide log port pty tty vcc

    # there is now the entry printers/0.

    -- To unsubscribe, send mail to: linux-parport-request@torque.net --
    -- with the single word "unsubscribe" in the body of the message. --

    This archive was generated by hypermail 2b29 : Wed May 16 2001 - 09:37:51 EDT