linux-toradex.git/arch/powerpc/kernel/udbg_16550.c, branch v3.2.8

powerpc: Add early debug for WSP platforms

2011-05-06T03:32:41+00:00

Signed-off-by: Jack Miller 
Signed-off-by: Michael Ellerman 
Signed-off-by: Benjamin Herrenschmidt

Fix common misspellings

2011-03-31T14:26:23+00:00

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi

trivial: fix typo "for for" in multiple files

2009-09-21T13:14:54+00:00

trivial: fix typo "for for" in multiple files

Signed-off-by: Anand Gadiyar 
Signed-off-by: Jiri Kosina

powerpc/440: Fix warning early debug code

2009-06-26T06:55:35+00:00

The function udbg_44x_as1_flush() has the wrong prototype causing
a warning when enabling 440 early debug.

Signed-off-by: Benjamin Herrenschmidt

powerpc/udbg: Fix lost byte during console handover; change LFCR to CRLF

2009-03-11T06:11:34+00:00

When the console is on a serial port to be driven by serial8250, a
character can be lost from the end of the first line in the two-line
sequence

	serial8250.0: ttyS0 at MMIO 0xe0004500 (irq = 42) is a 16550A
	console handover: boot [udbg0] -> real [ttyS0]

This happens because udbg_puts or udbg_write stuff the last byte of
the line into the Tx FIFO and return, whereupon the serial8250
initialization code immediately empties that FIFO.  The fix: udbg_puts
and udbg_write now wait for the Tx FIFO to clear before returning.
This delays the system by one additional serial frame time for each
line written by udbg, but the effect is not noticeable, a cumulative
17 milliseconds for 200 lines of early printk output at 115200 baud.

Also, the routines in udbg_16550.c now emit CRLF instead of LFCR.
Linux makes a point of emitting CRLF because, when serial output is
captured to a file, LFCR sequences can confuse text editors.  See
http://lkml.org/lkml/2006/2/4/50 for some history.

Signed-off-by: Andrew Klossner 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Unsigned speed cannot be negative in udbg_16559.c

2008-10-21T04:17:47+00:00

"unsigned int" speed cannot be negative, it's thus pointless
to test if it is.

Signed-off-by: Roel Kluin 
Signed-off-by: Benjamin Herrenschmidt

[POWERPC] 4xx: Add early udbg support for 40x processors

2007-12-23T19:13:03+00:00

This adds some basic real mode based early udbg support for 40x
in order to debug things more easily

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Josh Boyer

[POWERPC] Remove useless volatiles in udbg_16550.c

2007-12-11T04:43:35+00:00

This removes "volatile" from the MMIO pointer udbg_comport
in udbg_16550.c driver, it's useless and makes checkpatch.pl
complain when adding things to this file.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Paul Mackerras

[POWERPC] 4xx: Implement udbg_getc() for 440

2007-09-20T02:13:17+00:00

Implement udbg_getc() for 440, which fixes xmon input.

Signed-off-by: Hollis Blanchard 
Acked-by: David Gibson 
Signed-off-by: Josh Boyer

[POWERPC] Early serial debug support for PPC44x

2007-05-08T04:47:33+00:00

This adds support for early serial debugging via the built in
port on IBM/AMCC PowerPC 44x CPUs.  It uses a bolted TLB entry in
address space 1 for the UART's mapping, allowing robust debugging both
before and after the initialization of the MMU.

Signed-off-by: David Gibson 
Signed-off-by: Paul Mackerras