[lkml]   [2005]   [Dec]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: RFC: add udev support to parport_pc
Thank you for the reply.  Comments inline.

>I would prefer to actually see == 0x378 in the code, because the
>hexademical number is what you see everywhere else, such as the BIOS POST
>and /proc/ioports. This also applies to 0x278 and 0x3BC below.
This is what I wanted but I could not figure out how do it. If you tell me
how I will be happy to change it. I tried if (p->base == 0x378) but then
class_device_create does not get executed.

> > + {
> > + class_device_create(parallel_class, NULL, MKDEV(6, 0), NULL,
> > "lp0");
> > + class_device_create(parallel_class, NULL, MKDEV(99, 0), NULL,
> > "parport0");
> > + }
>Background info before: Because I burnt my on-board LPT port (applying too
>much volts or milliamps), I bought a dual-slot PCI add-in card. This card
>provides "parport1" and "parport2" at ports at 0xC800 and 0xC00
The last experience I have with off board cards was about 5 years ago. The
choices for the two parallel ports were 378, 278, or 3BC. I was not aware
that you had flexibility now.
>There are a number of problems in your code:
>1- testing just for 0x378/0x278/0x3BC is not enough
>2- parport0 could be 0xC800 (address may vary) if you do not
> have any onboard LPT ports.
> 2=> that is why I think you should not reserver "lp0"/"parport0"
> for 0x378.
As I said above I was not aware todays off board parallel ports had more
choices. I will see what I can do to fix this. Do you have any


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-12-31 19:12    [W:0.056 / U:0.588 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site