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2018-05-07SPDX: Convert all of our single license tags to Linux Kernel styleTom Rini
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>
2018-05-06stdio_names: Ensure MAX_NAMES is defined before use, don't use 3 directlyTom Rini
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>
2017-12-07Revert "sandbox: Drop special case console code for sandbox"Simon Glass
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 d8c6fb8cedbc35eee27730a7fa544e499b3c81cc. Signed-off-by: Simon Glass <sjg@chromium.org>
2017-11-12Revert "console: simplify puts()"Soeren Moch
This reverts commit c61d0009feb966e0e93254a8c435a1889085e6b8. 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>
2017-08-28common: console: Fix duplicated CONFIG in silent env callbackWilson Lee
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>
2017-08-16env: Rename getenv/_f() to env_get()Simon Glass
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>
2017-08-16env: Rename setenv() to env_set()Simon Glass
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>
2017-07-31dm: console: Check for serial devices properlySimon Glass
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>
2017-07-31console: Unify the check for a serial consoleSimon Glass
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>
2017-07-28console: simplify puts()Masahiro Yamada
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>
2017-07-11sandbox: Drop special case console code for sandboxSimon Glass
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>
2017-07-11console: Use map_sysmem() for the pre-relocation consoleSimon Glass
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>
2017-07-11Allow displaying the U-Boot banner on a video displaySimon Glass
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>
2017-02-06console: Don't enable CONFIG-CONSOLE_MUX, etc. in SPLSimon Glass
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>
2016-10-23Convert CONSOLE_PRE_CONSOLE_BUFFER options to KconfigSimon Glass
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>
2016-10-23Convert SILENT_CONSOLE options to KconfigSimon Glass
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>
2016-10-17watchdog: Fix Watchdog Reset while in U-Boot PromptAndreas J. Reichel
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>
2016-10-07common/console.c: ensure GD_FLG_SILENT is set or clearedChris Packham
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>
2016-03-27debug_uart: Remove duplicated carriage return handlingBin Meng
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>
2016-02-11dm: video: Add a temporary work-around for old stdout varSimon Glass
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>
2016-01-25common/console.c: Remove unused inline functionsTom Rini
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>
2015-11-23lib/tiny-printf.c: Add tiny printf function for space limited environmentsStefan Roese
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>
2015-11-23common/console.c: Small coding style cleanupStefan Roese
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>
2015-11-23common/console.c: Drop sandbox special-case console codeStefan Roese
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>
2015-11-19console: Add a console bufferSimon Glass
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>
2015-11-19Move console definitions into a new console.h fileSimon Glass
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>
2015-07-21sandbox: Drop special-case sandbox console codeSimon Glass
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>
2015-07-21dm: Allow debug UART to support an early consoleSimon Glass
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>
2015-05-19console: Fix pre-console flushing via cfb_console being very slowHans de Goede
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>
2015-01-29Export redesignMartin Dorwig
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)
2015-01-14console: Use pre-console buffer to get complete log on all consolesSiarhei Siamashka
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>
2014-12-08Fix console functions for U-Boot APISimon Glass
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>
2014-10-25common:console: add missing includeJeroen Hofstee
search_device is declared in iomux, but console only had the definition. This prevents a warning. Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
2014-09-24sandbox: Disable Ctrl-CSimon Glass
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>
2014-07-23Add a flag indicating when the serial console is readySimon Glass
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>
2014-07-23console: Remove vprintf() optimisation for sandboxSimon Glass
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>
2014-07-23stdio: Pass device pointer to stdio methodsSimon Glass
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>
2014-05-23Add the function 'confirm_yesno' for interactivePierre Aubert
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>
2014-01-08sandbox: Allow the console to work earlierSimon Glass
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>
2013-07-24Add GPL-2.0+ SPDX-License-Identifier to source filesWolfgang Denk
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
2012-12-13env: Add a silent env handlerJoe Hershberger
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>
2012-12-13env: Add a console env handlerJoe Hershberger
Remove the hard-coded console handler and use a callback instead Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
2012-12-13env: Refactor do_apply to a flagJoe Hershberger
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>
2012-12-11console: Enable function to display console infoSimon Glass
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>
2012-03-23Revert "Add board_pre_console_putc to deal with early console output"Simon Glass
This reverts commit 295d3942b806552503243f5cfb36aec6f1b5a9bf. 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>
2011-12-17Make printf and vprintf safe from buffer overrunsSonny Rao
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>
2011-12-09Add board_pre_console_putc to deal with early console outputSimon Glass
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>
2011-10-05console: Implement pre-console bufferGraeme Russ
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.
2011-10-01console: Squelch pre-console output in console functionsGraeme Russ
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>
2010-11-28stdio: constify "name" arg in public apiMike Frysinger
Signed-off-by: Mike Frysinger <vapier@gentoo.org>