linux.git/drivers/serial/dz.c, branch master

tty: move drivers/serial/ to drivers/tty/serial/

2011-01-13T20:10:18+00:00

The serial drivers are really just tty drivers, so move them to
drivers/tty/ to make things a bit neater overall.

This is part of the tty/serial driver movement proceedure as proposed by
Arnd Bergmann and approved by everyone involved a number of months ago.

Cc: Arnd Bergmann 
Cc: Alan Cox 
Cc: Geert Uytterhoeven 
Cc: Rogier Wolff 
Cc: Michael H. Warfield 
Signed-off-by: Greg Kroah-Hartman

serial: kill off uart_info

2009-09-19T20:13:28+00:00

We moved this into uart_state, now move the fields out of the separate
structure and kill it off.

Signed-off-by: Alan Cox 
Signed-off-by: Greg Kroah-Hartman

serial: DZ11: avoid a hang at console switch-over

2008-07-24T17:47:29+00:00

Changes to the generic console support code that happened a while ago
introduced a scenario where the initial console is used in parallel with
the final console during a brief period when switching between the two is
in progress.  During that time a message about the switch-over is printed.

With some combinations of chips, firmware and drivers, such as the DEC
DZ11 clone used with the DECstation, a hang may happen because the
firmware used for the initial console may not expect the state of the chip
after it has been initialised by the driver.

This is a workaround for the DZ11 which reuses the power-management
callback to keep the transmitter of the line associated with the console
enabled.  It reflects the consensus reached in a discussion a while ago.

Signed-off-by: Maciej W. Rozycki 
Cc: Jiri Slaby 
Cc: Alan Cox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Fix compile errors in SGI console drivers (linux-next tree)

2008-07-21T00:12:36+00:00

The below is the patch to replace blindly all possible places,
including Jack's fixes.

Signed-off-by: Takashi Iwai 
(Reviewed and checked rather than blindly added)
Signed-off-by: Alan Cox 
Signed-off-by: Linus Torvalds

dz: test after postfix decrement fails in dz_console_putchar()

2008-04-28T15:58:16+00:00

When loops reaches 0 the postfix decrement still subtracts, so the subsequent
test fails.

Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Acked-by: Maciej W. Rozycki 
Cc: Johannes Weiner 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

dz.c: Resource management

2008-02-07T16:42:24+00:00

This is a set of changes to implement proper resource management in the
driver, including iomem space reservation and operating on physical
addresses ioremap()ped appropriately using accessory functions rather than
unportable direct assignments.

Some adjustments to code are made to reflect the architecture of the
interface, which is a centrally controlled multiport (or, as referred to
from DEC documentation, a serial line multiplexer, going up to 8 lines
originally) rather than a bundle of separate ports.

Types are changed, where applicable, to specify the width of hardware
registers explicitly.  The interrupt handler is now managed in the
->startup() and ->shutdown() calls for consistency with other drivers and
also in preparation to handle the handover from the initial firmware-based
console gracefully.

Signed-off-by: Maciej W. Rozycki 
Cc: Ralf Baechle 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

dz.c: Use a helper to cast from "struct uart_port *"

2008-02-07T16:42:24+00:00

Replace all casts from "struct uart_port *" to "struct dz_port *" with a
construct based on container_of().  This makes the conversion work
irrespective of where the former struct is located within the latter.

By popular request I have implemented it as an inline function rather than
a macro this time.

Signed-off-by: Maciej W. Rozycki 
Cc: Ralf Baechle 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

dz: clean up and improve the setup of termios settings

2008-02-07T16:42:24+00:00

A set of changes to the way termios settings are propagated to the serial
port hardware.  The DZ11 only supports a selection of fixed baud settings,
so some requests may not be fulfilled.  Keep the old setting in such a case
and failing that resort to 9600bps.  Also add a missing update of the
transmit timeout.  And remove the explicit encoding of the line selected
from writes to the Line Parameters Register as it has been preencoded by
the ->set_termios() call already.  Finally, remove a duplicate macro for
the Receiver Enable bit.

Signed-off-by: Maciej W. Rozycki 
Cc: Ralf Baechle 
Cc: Alan Cox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

dz: handle special conditions on reception correctly

2008-02-07T16:42:24+00:00

Handle the read and ignore status masks correctly.  Handle the BREAK condition
as expected: a framing error with a null character is a BREAK, any other
framing error is a framing error indeed.

Signed-off-by: Maciej W. Rozycki 
Cc: Jiri Slaby 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

dz: fix locking issues

2008-02-07T16:42:24+00:00

The ->start_tx(), ->stop_tx() and ->stop_rx() backends are called with the
port's lock already taken.  Remove locking from within them and wrap around
calls as necessary.

Signed-off-by: Maciej W. Rozycki 
Cc: Jiri Slaby 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds