Commit graph

80 commits

Author SHA1 Message Date
Tom Rini
83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00
Tom Rini
27b4225b3c stdio_names: Ensure MAX_NAMES is defined before use, don't use 3 directly
With tighter build flags the fact that <stdio_dev.h> doesn't have a
reference back to MAX_NAMES causes an error.  Include <stdio.h> here and
then in common/console.c use MAX_NAMES rather than 3 when working with
stdio_names.

Reported-by: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
2018-05-06 13:35:16 -04:00
Simon Glass
64e9b4f346 Revert "sandbox: Drop special case console code for sandbox"
While sandbox works OK without the special-case code, it does result in
console output being stored in the pre-console buffer while sandbox starts
up. If there is a crash or a problem then there is no indication of what
is going on.

For ease of debugging it seems better to revert this change also.

This reverts commit d8c6fb8ced.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-12-07 15:17:00 -05:00
Soeren Moch
be135cc5eb Revert "console: simplify puts()"
This reverts commit c61d0009fe.

A tbs2910 board user reported a very slow console frambuffer as
regression in current u-boot. I could bisect this down to the
above mentioned commit.

This revert brings back the fast framebuffer console (one
cache flush per string in puts(), not after each char).

Reported-by: Uwe Scheffler <scheffler.u@web.de>
Signed-off-by: Soeren Moch <smoch@web.de>
Tested-by: Uwe Scheffler <scheffler.u@web.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2017-11-12 16:18:16 -05:00
Wilson Lee
5daf6e56d3 common: console: Fix duplicated CONFIG in silent env callback
The silent environment callback function does not update the silent
flag during silent env set or unset. That is because of duplicated
CONFIG keyword at preprocessor condition in silent environment
callback function and cause silent env callback unable to work.

This patch is to remove the duplicated CONFIG keywork in silent
environment callback function.

Signed-off-by: Wilson Lee <wilson.lee@ni.com>
Cc: Keng Soon Cheah <keng.soon.cheah@ni.com>
Cc: Chen Yee Chew <chen.yee.chew@ni.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
2017-08-28 07:19:12 -04:00
Simon Glass
00caae6d47 env: Rename getenv/_f() to env_get()
We are now using an env_ prefix for environment functions. Rename these
two functions for consistency. Also add function comments in common.h.

Quite a few places use getenv() in a condition context, provoking a
warning from checkpatch. These are fixed up in this patch also.

Suggested-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Simon Glass <sjg@chromium.org>
2017-08-16 08:30:24 -04:00
Simon Glass
382bee57f1 env: Rename setenv() to env_set()
We are now using an env_ prefix for environment functions. Rename setenv()
for consistency. Also add function comments in common.h.

Suggested-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Simon Glass <sjg@chromium.org>
2017-08-16 08:22:18 -04:00
Simon Glass
7b3c4c3a53 dm: console: Check for serial devices properly
With driver model the serial device is often not called "serial". Mark
driver-model stdio devices so that they can be detected and we can look up
the uclass. This is a more reliable way of finding out whether the console
is connected to a serial device or not.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-07-31 12:21:40 -04:00
Simon Glass
42f9f915c2 console: Unify the check for a serial console
Put the check for whether a console is a serial device in a function so
that we can share the code in the two places that use it.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-07-31 12:21:40 -04:00
Masahiro Yamada
c61d0009fe console: simplify puts()
Current puts() and putc() have similar #ifdef / if() conditionals.
Make puts() iterate over putc() to avoid code duplication.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2017-07-28 12:02:47 -06:00
Simon Glass
d8c6fb8ced sandbox: Drop special case console code for sandbox
At present sandbox has a special case where it directly calls os_putc()
when it does not have a console yet.

Now that we have the pre-console buffer enabled we can drop this. Any
early characters will be buffered and output later.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
2017-07-11 10:08:20 -06:00
Simon Glass
4e6bafa568 console: Use map_sysmem() for the pre-relocation console
At present this feature casts the address to a pointer. Use the
map_sysmem() function so that it will work correctly on sandbox.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
2017-07-11 10:08:19 -06:00
Simon Glass
b0895384be Allow displaying the U-Boot banner on a video display
At present the U-Boot banner is only displayed on the serial console. If
this is not visible to the user, the banner does not show. Some devices
have a video display which can usefully display this information.

Add a banner which is printed after relocation only on non-serial devices
if CONFIG_DISPLAY_BOARDINFO_LATE is defined.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
2017-07-11 10:08:19 -06:00
Simon Glass
b026542946 console: Don't enable CONFIG-CONSOLE_MUX, etc. in SPL
CONFIG_CONSOLE_MUX and CONFIG_SYS_CONSOLE_IS_IN_ENV are not applicable
for SPL. Update the console code to use CONFIG_IS_ENABLED(), so that these
options will be inactive in SPL.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2017-02-06 11:38:46 +08:00
Simon Glass
8f92558414 Convert CONSOLE_PRE_CONSOLE_BUFFER options to Kconfig
Move these option to Kconfig and tidy up existing uses.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagan Teki <jteki@openedev.com>
2016-10-23 18:33:19 -04:00
Simon Glass
98af879976 Convert SILENT_CONSOLE options to Kconfig
Move these option to Kconfig and tidy up existing uses.

The Power PC boards don't have a suitable common element: the common header
files don't appear to line up with the Kconfig files as far as I can tell.
This results in a lot of defconfig changes.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagan Teki <jteki@openedev.com>
[trini: Re-migrate, update common/console.c logic]
Signed-off-by: Tom Rini <trini@konsulko.com>
2016-10-23 18:33:18 -04:00
Andreas J. Reichel
644074671e watchdog: Fix Watchdog Reset while in U-Boot Prompt
Hardware: CM-FX6 Module from Compulab

This patch fixes unwanted watchdog resets while the user enters
a command at the U-Boot prompt.

As found on the CM-FX6 board from Compulab, when having enabled the
watchdog, a missing WATCHDOG_RESET call in common/console.c causes
this and alike boards to reset when the watchdog's timeout has
elapsed while waiting at the U-Boot prompt.

Despite the user could press several keys within the watchdog
timeout limit, the while loop in cli_readline.c, line 261, does only
call WATCHDOG_RESET if first == 1, which gets set to 0 in the 1st
loop iteration. This leads to a watchdog timeout no matter if the
user presses keys or not.

Although, this affects other boards as well as it touches
common/console.c, the macro WATCHDOG_RESET expands to {} if watchdog
support isn't configured. Hence, there's no harm caused and no need to
surround it by #ifdef in this case.

 * Symptom:
   U-Boot resets after watchdog times out when in commandline prompt
   and watchdog is enabled.

 * Reasoning:
   When U-Boot shows the commandline prompt, the following function
   call stack is executed while waiting for a keypress:

   common/main.c:
                    main_loop          => common/cli.c: cli_loop() =>
   common/cli_hush.c:
                    parse_file_outer   => parse_stream_outer       =>
                    parse_stream       => b_getch(i)               =>
                    i->get(i)          => file_get                 =>
                    get_user_input     => cmdedit_read_input       =>
                    uboot_cli_readline =>
   common/cli_readline.c:
                    cli_readline       => cli_readline_into_buffer =>
                    cread_line         => getcmd_getch (== getc)   =>
   common/console.c:
                    fgetc              => console_tstc

   common/console.c:
   (with CONFIG_CONSOLE_MUX is set)

   - in console_tstc line 181:
   If dev->tstc(dev) returns 0, the global tstcdev variable doesn't get
   set. This is the case if no character is in the serial buffer.

   - in fgetc(int file), line 297:
   Program flow keeps looping because tstcdev does not get set.
   Therefore WATCHDOG_RESET is not called, as mx_serial_tstc from
   drivers/serial/serial_mxc.c does not call it.

 * Solution:
   Add WATCHDOG_RESET into the loop of console_tstc.

   Note: Macro expands to {} if not configured, so no #ifdef is needed.

 * Comment:

Signed-off-by: Christian Storm <christian.storm@tngtech.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andreas J. Reichel <Andreas.Reichel@tngtech.com>
Acked-by: Simon Glass <sjg@chromium.org>
2016-10-17 21:31:01 -04:00
Chris Packham
43e0a3dec0 common/console.c: ensure GD_FLG_SILENT is set or cleared
When CONFIG_SILENT_CONSOLE is defined and the default environment has
silent=1 it is not possible for a user to make the console un-silent if
the environment is not available when console_init_f() is called (for
example because the environment is in SPI).

Add a new helper function console_update_silent() and call it from both
console_init_f() and console_init_r().

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-10-07 14:26:29 +00:00
Bin Meng
ce1a7d1564 debug_uart: Remove duplicated carriage return handling
Since commit b391d74 "debug_uart: output CR along with LF", the
handling in puts() is duplicated, not to mention that it should
output carriage return before line feed.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-03-27 09:12:26 -04:00
Simon Glass
a2931b30d2 dm: video: Add a temporary work-around for old stdout var
Boards with a saved environment may use 'lcd' in their stdout environment
variable, expecting that this will enable output to the LCD. When the board
moves to use driver model for video, this will no-longer work. Add a
work-around to fix this. A warning messages is printed, and we will remove
the work-around at the end of 2016.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Anatolij Gustschin <agust@denx.de>
Tested-by: Stephen Warren <swarren@nvidia.com>
2016-02-11 21:37:17 +01:00
Tom Rini
3da5240925 common/console.c: Remove unused inline functions
clang-3.8 reports that these functions are unused, remove them.  As this
is the last part of CONFIG_MODEM_SUPPORT_DEBUG, drop that from README.

Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
2016-01-25 10:39:47 -05:00
Stefan Roese
7d9cde1031 lib/tiny-printf.c: Add tiny printf function for space limited environments
This patch adds a small printf() version that supports all basic formats.
Its intented to be used in U-Boot SPL versions on platforms with very
limited internal RAM sizes.

To enable it, just define CONFIG_USE_TINY_PRINTF in your defconfig. This
will result in the SPL using this tiny function and the main U-Boot
still using the full-blown printf() function.

This code was copied from:
http://www.sparetimelabs.com/printfrevisited
With mostly only coding style related changes so that its checkpatch
clean.

The size reduction is about 2.5KiB. Here a comparison for the db-mv784mp-gp
(Marvell AXP) SPL:

Without this patch:
  58963   18536    1928   79427   13643 ./spl/u-boot-spl

With this patch:
  56542   18536    1956   77034   12cea ./spl/u-boot-spl

Note:
To make it possible to compile tiny-printf.c instead of vsprintf.c when
CONFIG_USE_TINY_PRINTF is defined, the functions printf() and vprintf() are
moved from common/console.c into vsprintf.c in this patch.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Tom Rini <trini@konsulko.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
2015-11-23 10:56:07 -05:00
Stefan Roese
ddf7355a73 common/console.c: Small coding style cleanup
Change some comments to match the U-Boot coding style rules.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
2015-11-23 10:56:07 -05:00
Stefan Roese
dd5577703b common/console.c: Drop sandbox special-case console code
As done in commit da229e4e [sandbox: Drop special-case sandbox console code],
this patch drops the sandbox special-case code in vprintf() that was
missed by Simon at that time.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
2015-11-23 10:56:06 -05:00
Simon Glass
9854a8748c console: Add a console buffer
It is useful to be able to record console output and provide console input
via a buffer. This provides sandbox with the ability to run a command and
check its output. If the console is set to silent then no visible output
is generated.

This also provides a means to fix the problem where tests produce unwanted
output, such as errors or warnings. This can be confusing. We can instead
set the console to silent and record this output. It can be checked later
in the test if required.

It is possible that this may prove useful for non-test situations. For
example the console output may be suppressed for normal operations, but
recorded and stored for access by the OS. That feature is not implemented
at present.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-11-19 20:27:50 -07:00
Simon Glass
24b852a7a2 Move console definitions into a new console.h file
The console includes a global variable and several functions that are only
used by a small subset of U-Boot files. Before adding more functions, move
the definitions into their own header file.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-11-19 20:27:50 -07:00
Simon Glass
da229e4e57 sandbox: Drop special-case sandbox console code
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 <sjg@chromium.org>
2015-07-21 17:39:22 -06:00
Simon Glass
d6ea5307da dm: Allow debug UART to support an early console
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 <sjg@chromium.org>
2015-07-21 17:39:22 -06:00
Hans de Goede
a8552c7c9b console: Fix pre-console flushing via cfb_console being very slow
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 <hdegoede@redhat.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
2015-05-19 18:37:30 +02:00
Martin Dorwig
49cad54788 Export redesign
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 <dorwig@tetronik.com>
Acked-by: Simon Glass <sjg@chromium.org>

Signed-off-by: Simon Glass <sjg@chromium.org>
(resending to the list since my tweaks are not quite trivial)
2015-01-29 17:09:57 -07:00
Siarhei Siamashka
2766966750 console: Use pre-console buffer to get complete log on all consoles
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 <siarhei.siamashka@gmail.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Tom Rini <trini@ti.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2015-01-14 14:56:40 +01:00
Simon Glass
d8727713b6 Fix console functions for U-Boot API
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 <dorwig@tektronik.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-12-08 09:35:41 -05:00
Jeroen Hofstee
482f4691a3 common:console: add missing include
search_device is declared in iomux, but console only
had the definition. This prevents a warning.

Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
2014-10-25 07:27:37 -04:00
Simon Glass
8969ea3e9f sandbox: Disable Ctrl-C
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 <sjg@chromium.org>
2014-09-24 18:30:28 -04:00
Simon Glass
093f79ab88 Add a flag indicating when the serial console is ready
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 <sjg@chromium.org>
2014-07-23 14:07:25 +01:00
Simon Glass
7793ac96c6 console: Remove vprintf() optimisation for sandbox
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 <sjg@chromium.org>
2014-07-23 14:07:24 +01:00
Simon Glass
709ea543b9 stdio: Pass device pointer to stdio methods
At present stdio device functions do not get any clue as to which stdio
device is being acted on. Some implementations go to great lengths to work
around this, such as defining a whole separate set of functions for each
possible device.

For driver model we need to associate a stdio_dev with a device. It doesn't
seem possible to continue with this work-around approach.

Instead, add a stdio_dev pointer to each of the stdio member functions.

Note: The serial drivers have the same problem, but it is not strictly
necessary to fix that to get driver model running. Also, if we convert
serial over to driver model the problem will go away.

Code size increases by 244 bytes for Thumb2 and 428 for PowerPC.

22: stdio: Pass device pointer to stdio methods
       arm: (for 2/2 boards)  all +244.0  bss -4.0  text +248.0
   powerpc: (for 1/1 boards)  all +428.0  text +428.0

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Marek Vasut <marex@denx.de>
Reviewed-by: Marek Vasut <marex@denx.de>
2014-07-23 14:07:23 +01:00
Pierre Aubert
a5dffa4b67 Add the function 'confirm_yesno' for interactive
User's confirmation is asked in different commands. This commit adds a
function for such confirmation.

Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
Signed-off-by: Pierre Aubert <p.aubert@staubli.com>
2014-05-23 11:53:05 +03:00
Simon Glass
91b136c798 sandbox: Allow the console to work earlier
With sandbox, errors and problems may be reported before console_init_f()
is executed. For example, an argument may not parse correctly or U-Boot may
panic(). At present this output is swallowed so there is no indication what
is going wrong.

Adjust the console to deal with a very early sandbox setup, by detecting that
there is no global_data yet, and calling os functions in that case.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-01-08 17:24:50 -07:00
Wolfgang Denk
1a4596601f Add GPL-2.0+ SPDX-License-Identifier to source files
Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>
2013-07-24 09:44:38 -04:00
Joe Hershberger
e080d545f8 env: Add a silent env handler
The silent variable now updates the global data flag anytime it is
changed as well as after the env relocation (in case its value is
different from the default env in such cases as NAND env)

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
2012-12-13 11:46:56 -07:00
Joe Hershberger
849d5d9cda env: Add a console env handler
Remove the hard-coded console handler and use a callback instead

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
2012-12-13 11:46:56 -07:00
Joe Hershberger
c4e0057fa7 env: Refactor do_apply to a flag
Use a flag in hsearch_r for insert mode passed from import to allow the
behavior be different based on use.

Now that "do_check" is called for all imports, ensure console init is
complete before updating the console on relocation import

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
2012-12-13 11:46:54 -07:00
Simon Glass
78c112c9f9 console: Enable function to display console info
The CONFIG_SYS_CONSOLE_INFO_QUIET option should suppress the console
information, but allow boards to display it later if required. Adjust
the code to support this.

This is used to avoid printing the information while the LCD display
is not ready, since it only becomes ready when stdio init is complete.

Signed-off-by: Simon Glass <sjg@chromium.org>
2012-12-11 13:18:12 -07:00
Simon Glass
3fa4977a9e Revert "Add board_pre_console_putc to deal with early console output"
This reverts commit 295d3942b8.

It turns that this really doesn't work very nicely. Instead we should
have a pre-console panic function so that we know that further execution
is impossible and we don't need to worry about trampling on UARTs, etc.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Wolfgang Denk <wd@denx.de>
2012-03-23 21:27:32 +01:00
Sonny Rao
068af6f843 Make printf and vprintf safe from buffer overruns
From: Sonny Rao <sonnyrao@chromium.org>

utilize the added vscnprintf functions to avoid buffer overruns
The implementation is fairly dumb in that it doesn't detect
that the buffer is too small, but at least will not cause crashes.

Signed-off-by: Sonny Rao <sonnyrao@chromium.org>
2011-12-17 23:34:43 +01:00
Simon Glass
295d3942b8 Add board_pre_console_putc to deal with early console output
This patch adds support for console output before the console is inited.
The main purpose of this is to deal with a very early panic() which would
otherwise cause a silent hang.

A new board_pre_console_putc() function is added to the board API. If
provided by the board it will be called in the event of console output
before the console is ready. This function should turn on all UARTs and
spray the character out if it possibly can.

The feature is controlled by a new CONFIG_PRE_CONSOLE_PUTC option.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Graeme Russ <graeme.russ@gmail.com>
2011-12-09 14:44:22 +01:00
Graeme Russ
9558b48af0 console: Implement pre-console buffer
Allow redirection of console output prior to console initialisation to a
temporary buffer.

To enable this functionality, the board (or arch) must define:
 - CONFIG_PRE_CONSOLE_BUFFER - Enable pre-console buffer
 - CONFIG_PRE_CON_BUF_ADDR - Base address of pre-console buffer
 - CONFIG_PRE_CON_BUF_SZ - Size of pre-console buffer (in bytes)

The pre-console buffer will buffer the last CONFIG_PRE_CON_BUF_SZ bytes
Any earlier characters are silently dropped.
2011-10-05 22:03:09 +02:00
Graeme Russ
e3e454cd72 console: Squelch pre-console output in console functions
There are some locations in the code which anticipate printf() being called
before the console is ready by squelching printf() on gd->have_console.
Move this squelching into printf(), vprintf(), puts() and putc(). Also
make tstc() and getc() return 0 if console is not yet initialised

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
Tested-by: Simon Glass <sjg@chromium.org>
2011-10-01 21:54:49 +02:00
Mike Frysinger
d7be3056de stdio: constify "name" arg in public api
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-11-28 21:58:48 +01:00