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Re: [PATCH] use at_keyboard.c on i386-ieee1275

From: Robert Millan
Subject: Re: [PATCH] use at_keyboard.c on i386-ieee1275
Date: Wed, 23 Jan 2008 12:18:22 +0100
User-agent: Mutt/1.5.13 (2006-08-11)

On Wed, Jan 23, 2008 at 11:58:58AM +0100, Marco Gerards wrote:
> Robert Millan <address@hidden> writes:
> > Taking into account that ofconsole on i386:
> >
> >   - Has bugs with similar usability effect than at_keyboard.c (e.g. arrow 
> > keys
> >     not working).
> >   - In practice doesn't provide support for any keyboard other than AT
> >     (since OFW shuts down USB before transfering control to us).
> >   - Sharing code with other ports (CoreBoot, attow) is more efficient to get
> >     these bugs solved.
> >
> > I propose to use at_keyboard.c as default for i386-ieee1275.
> Fine for me, it is your baby :-) Although you forgot the changelog entry.

        * conf/i386-ieee1275.rmk (kernel_elf_SOURCES): Add

        * include/grub/i386/ieee1275/console.h: Add `<grub/symbol.h>'.  Remove
        (grub_keyboard_controller_init): New function prototype.
        (grub_console_checkkey): Likewise.
        (grub_console_getkey): Likewise.

        * kern/powerpc/ieee1275/init.c (grub_machine_init): Initialize AT
        keyboard on i386.

        * term/ieee1275/ofconsole.c (grub_ofconsole_term): On i386, use
        grub_ofconsole_checkkey() and grub_ofconsole_getkey() for input.

> Will you fix the ifdef's soon?

My plan is to propose a split of terminal handling in kernel so that input and
output terminals become different objects.  This would fix this hack and others
(such as intermangled at_keyboard.c/vga_text.c with console.c in CB port, or
gfxterm depending on grub_console_{get,check}key() ).

But I'd like to leave this for later.  As mentioned on IRC, Debian is planning
to start stabilizing next release in March.  If GRUB 2 is mostly in shape at
that time, we'll be able to use it as the default bootloader.

Which reminds me, is 1.96 coming soon?  When lvm/raid, reiserfs and powerpc
issues are fixed, it might be a good time.  What do you think?

> Doesn't this cause any problems?  Now there are two keyboard drivers
> active.

Not at all.  I didn't bother #ifdefing grub_ofconsole_{get,check}key out to
avoid cluttering it (since space is not critical), but it works fine here.

The only drawback is that it doesn't automaticaly switch to serial tty when
OFW is running there, but that's a problem for every other port anyway (I
have a solution in mind as well;  when we redesign terminal handling, we
could layout a scheme in which multiple input or output terminals can be
active at the same time).

Robert Millan

<GPLv2> I know my rights; I want my phone call!
<DRM> What use is a phone call… if you are unable to speak?
(as seen on /.)

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