linux-toradex.git/arch/sh/kernel/early_printk.c, branch v2.6.31.4

serial: sh-sci: Reorder the SCxTDR write after the TDxE clear.

2008-11-13T08:46:06+00:00

Under qemu there is a race between the TDxE read-and-clear and the SCxTDR
write. While on hardware it can be gauranteed that the read-and-clear
will happen prior to the character being written out, no such assumption
can be made under emulation. As this path happens with IRQs off and the
hardware itself doesn't care about the ordering, move the SCxTDR write
until after the read-and-clear.

Signed-off-by: Vladimir Prus 
Signed-off-by: Paul Mundt

sh: early printk port type fix

2008-11-13T06:37:07+00:00

Add PORT_SCIF to unbreak the early printk code.

Signed-off-by: Magnus Damm 
Signed-off-by: Paul Mundt

sh: reset hardware from early printk

2008-05-08T10:51:54+00:00

Reset the transmitter and receiver when setting up early printk.

Signed-off-by: Magnus Damm 
Signed-off-by: Paul Mundt

sh: drain and wait for early printk

2008-05-08T10:51:53+00:00

Drain by waiting for all characters to be sent, and make sure to
wait a little bit after setting up the baud rate.

Signed-off-by: Magnus Damm 
Signed-off-by: Paul Mundt

sh: use sci_out() for early printk

2008-05-08T10:51:52+00:00

Use sci_out() instead of ctrl_outw() for early printk setup code.

Signed-off-by: Magnus Damm 
Signed-off-by: Paul Mundt

sh: Add support for SH7721 CPU subtype.

2008-01-28T04:19:02+00:00

Signed-off-by: Yoshihiro Shimoda 
Signed-off-by: Paul Mundt

sh: early_printk tidying.

2007-10-02T07:24:50+00:00

setup_early_printk() can be static, and with that, we can kill off
the early initialization variable and move the CON_BOOT check in
to the function body.

Signed-off-by: Paul Mundt

sh: Add SH7720 CPU support.

2007-09-21T02:57:49+00:00

This adds support for the SH7720 (SH3-DSP) CPU.

Signed-off by: Markus Brunner 
Signed-off by: Mark Jonas 
Signed-off-by: Paul Mundt

sh: remove extraneous ; on scif_sercon_putc wait loop

2007-08-16T16:25:34+00:00

It seems we have gained an extraneous trailing ';' on one of the
wait loops in scif_sercon_putc().  Although this is completely
benign as the apparent payload is also the empty statement, it
invites error in the future.  Clean it up now.

Signed-off-by: Andy Whitcroft 
Signed-off-by: Paul Mundt

Fixes and cleanups for earlyprintk aka boot console

2007-05-08T18:15:04+00:00

The console subsystem already has an idea of a boot console, using the
CON_BOOT flag.  The implementation has some flaws though.  The major
problem is that presence of a boot console makes register_console() ignore
any other console devices (unless explicitly specified on the kernel
command line).

This patch fixes the console selection code to *not* consider a boot
console a full-featured one, so the first non-boot console registering will
become the default console instead.  This way the unregister call for the
boot console in the register_console() function actually triggers and the
handover from the boot console to the real console device works smoothly.
Added a printk for the handover, so you know which console device the
output goes to when the boot console stops printing messages.

The disable_early_printk() call is obsolete with that patch, explicitly
disabling the early console isn't needed any more as it works automagically
with that patch.

I've walked through the tree, dropped all disable_early_printk() instances
found below arch/ and tagged the consoles with CON_BOOT if needed.  The
code is tested on x86, sh (thanks to Paul) and mips (thanks to Ralf).

Changes to last version: Rediffed against -rc3, adapted to mips cleanups by
Ralf, fixed "udbg-immortal" cmd line arg on powerpc.

Signed-off-by: Gerd Hoffmann 
Acked-by: Paul Mundt 
Acked-by: Ralf Baechle 
Cc: Andi Kleen 
Cc: Alan Cox 
Cc: Richard Henderson 
Cc: Ivan Kokshaysky 
Cc: Paul Mackerras 
Cc: Benjamin Herrenschmidt 
Cc: Jeremy Fitzhardinge 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds