Re: [gentoo-user] Problems with /dev/parport0

[Hogren]

Hello,

I try to help you without parallel port, sorry.

Do you have parport installed as a module or directly in the kernel ? 
Did you try the two methods ?

If this is a module, did you run «insmod partport» ?

Do you follow a documentation ? Can you give a link ?


Regards,

Hogren



On 02/05/2019 17:33, karl@××××××××.se wrote:
> Where is the proper place to ask about parports ?
>
> ///
>
>   I get:
> # echo -n 1 > /dev/parport0
> bash: echo: write error: Invalid argument
>
> i.e. error 22 (EINVAL), as if there isn't any write routine
> in the driver. I have tested two identical cards, same story.
>
> Same thing with reading:
> $ dd if=/dev/parport0 count=1 bs=1
> dd: error reading '/dev/parport0': Invalid argument
> 0+0 records in
> 0+0 records out
> 0 bytes copied, 6.2359e-05 s, 0.0 kB/s
>
> open() and close() works without errors.
>
> How can I make it functional ?
>
> ///
>
>   I have two Delock 1x par, 2x ser pcie cards (only one installed).
>   The parport one show up (lspci -vn) as:
> 05:00.2 0701: 9710:9912 (prog-if 03 [IEEE1284])
>          Subsystem: a000:2000
>          Flags: bus master, fast devsel, latency 0, IRQ 17
>          I/O ports at ad00 [size=8]
>          I/O ports at ac00 [size=8]
>          Memory at fd8fb000 (32-bit, non-prefetchable) [size=4K]
>          Memory at fd8fa000 (32-bit, non-prefetchable) [size=4K]
>          Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
>          Capabilities: [78] Power Management version 3
>          Capabilities: [80] Express Legacy Endpoint, MSI 00
>          Capabilities: [100] Advanced Error Reporting
>          Kernel driver in use: parport_serial
>          Kernel modules: parport_serial
>
>   it matches:
>          { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9912,
>            0xA000, 0x2000, 0, 0, netmos_99xx_1p }
>   i.e. lines 176-177 in drivers/parport/parport_serial.c
>   in the kernel source, last changed ages ago:
> commit b9b24558f7d36c550b5cf0b550a8926f8c03cdbd
> Author: Frédéric Brière <fbriere@×××××××.net>
> Date:   Sun May 29 15:08:04 2011 -0400
>
>   It shows up in the log as:
> parport0: PC-style at 0xad00 (0xac00), irq 17, using FIFO [PCSPP,TRISTATE,COMPAT,EPP,ECP]
>   or
> parport0: PC-style at 0xad00 (0xac00), irq 17 [PCSPP,TRISTATE,EPP]
>   depending if I have CONFIG_PARPORT_PC_FIFO set or not in the kernel
>
>   I cannot set irq to none, it shows up as irq 17 even though I do:
> # modprobe parport_pc irq=none
> # modprobe parport_serial irq=none
>
>   The device file has sensible maj/min numbers:
> # ls -l /dev/parport0
> crw-rw---- 1 root users 99, 0 Jan 18  2016 /dev/parport0
>
> Regards,
> /Karl Hammar
>
>