u-boot.git/common/console.c, branch v2015.10

sandbox: Drop special-case sandbox console code

2015-07-21T23:39:22+00:00

At present printf() skips output if it can see there is no console. This
is really just an optimisation, and is not necessary. Also it is currently
incorrect in some cases. Rather than update the logic, just remove it so
that we don't need to keep it in sync.

Signed-off-by: Simon Glass

dm: Allow debug UART to support an early console

2015-07-21T23:39:22+00:00

When there is no console ready, allow the debug UART to be used for output.
This makes debugging of early code considerably easier.

Signed-off-by: Simon Glass

console: Fix pre-console flushing via cfb_console being very slow

2015-05-19T16:37:30+00:00

On my A10 OlinuxIno Lime I noticed a huge (5+ seconds) delay coming from
console_init_r. This turns out to be caused by the preconsole buffer flushing
to the cfb_console. The Lime only has a 16 bit memory bus and that is already
heavy used to scan out the 1920x1080 framebuffer.

The problem is that print_pre_console_buffer() was printing the buffer once
character at a time and the cfb_console code then ends up doing a cache-flush
for touched display lines for each character.

This commit fixes this by first building a 0 terminated buffer and then
printing it in one puts() call, avoiding unnecessary cache flushes.

This changes the time for the flush from 5+ seconds to not noticable.

The downside of this approach is that the pre-console buffer needs to fit
on the stack, this is not that much to ask since we are talking about plain
text here. This commit also adjusts the sunxi CONFIG_PRE_CON_BUF_SZ to
actually fit on the stack. Sunxi currently is the only user of the pre-console
code so no other boards need to be adjusted.

Signed-off-by: Hans de Goede 
Reviewed-by: Tom Rini

Export redesign

2015-01-30T00:09:57+00:00

this is an atempt to make the export of functions typesafe.
I replaced the jumptable void ** by a struct (jt_funcs) with function pointers.
The EXPORT_FUNC macro now has 3 fixed parameters and one
variadic parameter
The first is the name of the exported function,
the rest of the parameters are used to format a functionpointer
in the jumptable,

the EXPORT_FUNC macros are expanded three times,
1. to declare the members of the struct
2. to initialize the structmember pointers
3. to call the functions in stubs.c

Signed-off-by: Martin Dorwig 
Acked-by: Simon Glass 

Signed-off-by: Simon Glass 
(resending to the list since my tweaks are not quite trivial)

console: Use pre-console buffer to get complete log on all consoles

2015-01-14T13:56:40+00:00

Currently the pre-console buffer can accumulate early log messages
and flush them to the serial console as soon as it becomes available.

This patch just adds one more pre-console buffer flushing point and
does all the same for the other consoles too. This is particularly
useful for the vga/hdmi/lcd console, where we can see all the older
messages now (except for the log messages from SPL).

Naturally, we don't want to get an extra copy of the log messages
on the serial console again at the second flushing point, so the
serial console has to be explicitly filtered out.

Signed-off-by: Siarhei Siamashka 
Acked-by: Hans de Goede 
Acked-by: Tom Rini 
Signed-off-by: Hans de Goede

Fix console functions for U-Boot API

2014-12-08T14:35:41+00:00

Commit 709ea54 made a subtle change to the way the U-Boot API jump table
is set up. So at present putc(), getc(), tstc() and puts() do not work
correctly from functions that use the U-Boot API.

Previously these were set to the stdio functions, but these now take a
parameter specifying which stdio device to use. Instead, we should change
them to use the global functions which do not have a parameter.

This is a slight change in behaviour. The functions will now output to
all selected stdio devices - for example putc() will output a character to
all devices selected by stdout. However in most cases there is only one,
and it isn't necessarily incorrect behaviour anyway.

The API version is not changed since it is compatible with what was there
before.

Reported-by: Martin Dorwig 
Signed-off-by: Simon Glass

common:console: add missing include

2014-10-25T11:27:37+00:00

search_device is declared in iomux, but console only
had the definition. This prevents a warning.

Signed-off-by: Jeroen Hofstee

sandbox: Disable Ctrl-C

2014-09-24T22:30:28+00:00

This is not supported properly on sandbox, and interferes with running
tests, since when a test script is piped in, some commands will call
ctrlc() which will drop characters from the test script.

Signed-off-by: Simon Glass

Add a flag indicating when the serial console is ready

2014-07-23T13:07:25+00:00

For sandbox we have a fallback console which is used very early in
U-Boot, before serial drivers are available. Rather than try to guess
when to switch to the real console, add a flag so we can be sure. This
makes sure that sandbox can always output a panic() message, for example,
and avoids silent failure (which is very annoying in sandbox).

Signed-off-by: Simon Glass

console: Remove vprintf() optimisation for sandbox

2014-07-23T13:07:24+00:00

If the console is not present, we try to reduce overhead by stopping any
output in vprintf(), before it gets to putc(). This is of dubious merit
in general, but in the case of sandbox it is incorrect since we have a
fallback console which reports errors very early in U-Boot. If this is
defeated U-Boot can hang or exit with no indication of what is wrong.

Remove the optimisation for sandbox.

Signed-off-by: Simon Glass