u-boot.git/include/stdio_dev.h, branch v2025.07-rc2

usb: gadget: Remove the legacy usbtty driver

2025-03-10T08:22:35+00:00

The lone user of this driver has been removed for some time. Remove this
driver as well.

Signed-off-by: Tom Rini 
Reviewed-by: Mattijs Korpershoek 
Link: https://lore.kernel.org/r/20250227205101.4127604-2-trini@konsulko.com
Signed-off-by: Mattijs Korpershoek

stdio: fix stdio_deregister_dev()

2023-10-09T19:24:31+00:00

When copying the name of a stdio device we must ensure that it is NUL
terminated before passing it to strcmp() to avoid a buffer overrun.

Truncating the name field leads to failure to deregister a stdio device.
When copying we must ensure that the name field sizes match.

Addresses-Coverity-ID: 350462 String not null terminated
Fixes: 5294e97832a6 ("stdio: extend "name" to 32 symbols")
Signed-off-by: Heinrich Schuchardt 
Reviewed-by: Simon Glass

console: Make stdio_print_current_devices() static

2023-08-02T08:32:02+00:00

As it is only called in common/console.c

Signed-off-by: Bin Meng 
Reviewed-by: Simon Glass 
Tested-by: Simon Glass   # qemu-x86_64

stdio: Remove stdio_init()

2023-06-21T00:56:27+00:00

This function is not used by anyone.

Signed-off-by: Masahiro Yamada 
Reviewed-by: Simon Glass

console: Implement flush() function

2022-09-24T14:47:01+00:00

On certain places it is required to flush output print buffers to ensure
that text strings were sent to console or serial devices. For example when
printing message that U-Boot is going to boot kernel or when U-Boot is
going to change baudrate of terminal device.

Therefore introduce a new flush() and fflush() functions into console code.
These functions will call .flush callback of associated stdio_dev device.

As this function may increase U-Boot side, allow to compile U-Boot without
this function. For this purpose there is a new config CONSOLE_FLUSH_SUPPORT
which is enabled by default and can be disabled. It is a good idea to have
this option enabled for all boards which have enough space for it.

When option is disabled when U-Boot defines just empty static inline
function fflush() to avoid ifdefs in other code.

Signed-off-by: Pali Rohár 
Reviewed-by: Simon Glass

usb: gadget: Add CDC ACM function

2022-01-26T22:23:17+00:00

Add support for CDC ACM using the new UDC and gadget API. This protocol
can be used for serial over USB data transfer and is widely supported
by various OS (GNU/Linux, MS-Windows, OSX...). The usual purpose of
such link is to access device debug console and can be useful for
products not exposing regular UART to the user.

A default stdio device named 'usbacm' is created, and can be used
to redirect console to USB link over CDC ACM:

> setenv stdin usbacm; setenv stdout usbacm

Signed-off-by: Loic Poulain

stdio: Introduce a new helper stdio_file_to_flags()

2021-02-16T16:16:07+00:00

Let's deduplicate existing copies by splitting off to a new helper.

Signed-off-by: Andy Shevchenko

stdio: Get rid of dead code, i.e. stdio_deregister()

2021-02-16T16:16:07+00:00

Nobody is using stdio_deregister(), remove for good.

Note, even its parameters are not consistent with stdio_register().
So, if anyone want to introduce this again, better with some consistency.

Signed-off-by: Andy Shevchenko

stdio: Tidy up the coding style

2020-08-23T17:43:10+00:00

Bring the coding style in this file up to the current level.

Signed-off-by: Simon Glass

stdio: Drop #ifdefs in the header file

2020-08-23T17:43:10+00:00

These prevent the use of IS_ENABLED() and are unnecessary. Drop them and
fix a few code-style nits nearby.

Signed-off-by: Simon Glass