mangled isapnp IDs in /proc/bus/isapnp/devices

mangled isapnp IDs in /proc/bus/isapnp/devices

[Rene Rebe]

Hi all,

is there a reason why the isapnp device id are mangled this way:

drivers/pnp/isapnp_proc.c

static void isapnp_devid(char *str, unsigned short vendor, unsigned short device)
{
        sprintf(str, "%c%c%c%x%x%x%x",
                        'A' + ((vendor >> 2) & 0x3f) - 1,
                        'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
                        'A' + ((vendor >> 8) & 0x1f) - 1,
                        (device >> 4) & 0x0f,
                        device & 0x0f,
                        (device >> 12) & 0x0f,
                        (device >> 8) & 0x0f);
}

This results in output like:

CSCd937 CSC0000

Which I have to un-mangle ... :-( What is the reason for not outputting
simple hex?

Sincerely,
- René

--  
René Rebe - Europe/Germany/Berlin
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Re: mangled isapnp IDs in /proc/bus/isapnp/devices

[Alan Cox]

On Maw, 2003-04-22 at 10:46, Rene Rebe wrote:
> Hi all,
> 
> is there a reason why the isapnp device id are mangled this way:

This is how the spec says the names work

Re: mangled isapnp IDs in /proc/bus/isapnp/devices

[Rene Rebe]

Hi.

On: 22 Apr 2003 15:06:43 +0100,
    Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> On Maw, 2003-04-22 at 10:46, Rene Rebe wrote:
> > Hi all,
> > 
> > is there a reason why the isapnp device id are mangled this way:
> 
> This is how the spec says the names work

Yes - but for userspace tool it would have been easier to export the
raw number; as listed in:

/lib/modules/<ver>/modules.isapnpmap

Now I added the mangling to the auto-detect script here ...

Sincerely,
- René

--  
René Rebe - Europe/Germany/Berlin
e-mail:   rene@rocklinux.org, rene.rebe@gmx.net
web:      http://www.rocklinux.org/people/rene http://gsmp.tfh-berlin.de/rene/

Anyone sending unwanted advertising e-mail to this address will be
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