No response from keyboard on Oldworld: possibly relevant kernel change

[Chris Tillman <tillman@azstarnet.com>]

>From the patch-2.2.18.gz pot file:

<excerpt>

diff -u --new-file --recursive --exclude-from /usr/src/exclude
v2.2.17/drivers/block/rd.c linux/drivers/block/rd.c
--- v2.2.17/drivers/block/rd.c    Sat Sep  9 18:42:34 2000
+++ linux/drivers/block/rd.c    Wed Nov  8 23:00:34 2000
@@ -614,9 +614,11 @@
#ifdef CONFIG_MAC_FLOPPY
        if(MAJOR(ROOT_DEV) == FLOPPY_MAJOR)
            swim3_fd_eject(MINOR(ROOT_DEV));
+#ifdef CONFIG_BLK_DEV_INITRD
        else if(MAJOR(real_root_dev) == FLOPPY_MAJOR)
            swim3_fd_eject(MINOR(real_root_dev));
#endif
+#endif
        printk(KERN_NOTICE
               "VFS: Insert root floppy disk to be loaded into RAM disk and
press ENTER\n");
        wait_for_keypress();
@@ -653,7 +655,9 @@

#define OF(args)  args

+#ifndef memzero
#define memzero(s, n)     memset ((s), 0, (n))
+#endif


typedef unsigned char  uch;

</excerpt>


>From the most recent kernel 2.4.3 in the same spot:

<excerpt>

#ifdef CONFIG_BLK_DEV_FD
       floppy_eject();
#endif
#ifdef CONFIG_MAC_FLOPPY
       if(MAJOR(ROOT_DEV) == FLOPPY_MAJOR)
           swim3_fd_eject(MINOR(ROOT_DEV));
       else if(MAJOR(real_root_dev) == FLOPPY_MAJOR)
           swim3_fd_eject(MINOR(real_root_dev));
#endif
       printk(KERN_NOTICE
              "VFS: Insert root floppy disk to be loaded into RAM disk and
press ENTER\n");
       wait_for_keypress();

</excerpt>


It looks to me like the lines that were added in 2.2.18 just prior to the
Insert root 
floppy prompt, which check for initrd, were reverted sometime before 2.4.3.
I don't 
have a clue how to easily find out what revision the revert took place in,
but I'm thinking 
this might be the cause of the no-response woes. ('Cause they probably had a
similar problem 
and later fixed it by reverting.) I would normally look for something after
the wait_for_keypress
to have been changed, but I'm thinking maybe if the floppy doesn't get into
the right state before
the wait, the wait could last a long time.



Here are other possibilities of powerpc kernel changes in 2.2.18 related to
floppy,
boot, etc.

Summary of changes for 2.2.18. A full change document will follow later

2.2.18pre25
o    Fix drivers/char/Makefile buglet        (Chip Salzenberg)
o    PPC syscall table fix                (Chip Salzenberg)

2.2.18pre21
o    Resnchronize Apple PowerMac codebase        (Paul Mackerras & co)
o    Merge powermac tree fixes into usb
o    Powermac input device handling changes
o    Fix console switch fonts

2.2.18pre19
o    Update IDE floppy maintainer            (Paul Bristow)

2.2.18pre18
o    IDE floppy updates for clik support, cleanups    (Paul Bristow)

2.2.18pre16
o    Console 'quiet' boot option as in 2.4        (Rusty Russell)
o    Fix PPC for loops per jiffy            (Cort Dougan)
o    Restore old block size on devices after a
   partition scan (needed for powermac for one)    (Michael Schmitz)

2.2.18pre10
o    Allow PlanB video on generic PPC        (Michel Lanners)

2.2.18pre9
o    Use both fast and slow A20 gating on boot    (Kira Brown)
   | if your box doesnt boot I want to know about it...
   | Needed for stuff like the AMD Elan

2.2.18pre8
o    Alpha PCI boot up fix                (Michal Jaegermann)
o    Fix vt/keyboard dependancy in USB config    (Arjan van de Ven)

2.2.18pre5
o    Fix crash on boot problem with __setup stuff    (me)

Linux 2.2.17 Release Notes

PowerPC
    PPC should now be back in line between the main tree and the PPC
    distribution save for USB.
       o ATI video fixes
       o Fix zImage for chrp platforms
       o Numerous small fixes
 
-- 
Chris Tillman
tillman@azstarnet.com