mirror of
https://github.com/brain-hackers/u-boot-brain
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493a4c8af7
In the video drivers it is useful to print errors while debugging but doing so risks an infinite loop as the debugging info itself may go through the video drivers. Add a new console function that prints information only to the serial device, thus making it safe for use in debugging. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2000-2009
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*/
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#ifndef __CONSOLE_H
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#define __CONSOLE_H
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#include <stdbool.h>
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extern char console_buffer[];
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/* common/console.c */
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int console_init_f(void); /* Before relocation; uses the serial stuff */
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int console_init_r(void); /* After relocation; uses the console stuff */
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int console_assign(int file, const char *devname); /* Assign the console */
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int ctrlc(void);
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int had_ctrlc(void); /* have we had a Control-C since last clear? */
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void clear_ctrlc(void); /* clear the Control-C condition */
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int disable_ctrlc(int); /* 1 to disable, 0 to enable Control-C detect */
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int confirm_yesno(void); /* 1 if input is "y", "Y", "yes" or "YES" */
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/**
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* console_record_init() - set up the console recording buffers
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*
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* This should be called as soon as malloc() is available so that the maximum
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* amount of console output can be recorded.
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*/
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int console_record_init(void);
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/**
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* console_record_reset() - reset the console recording buffers
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*
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* Removes any data in the buffers
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*/
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void console_record_reset(void);
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/**
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* console_record_reset_enable() - reset and enable the console buffers
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*
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* This should be called to enable the console buffer.
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*/
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void console_record_reset_enable(void);
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/**
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* console_record_readline() - Read a line from the console output
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*
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* This reads the next available line from the console output previously
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* recorded.
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*
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* @str: Place to put string
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* @maxlen: Maximum length of @str including nul terminator
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* @return length of string returned
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*/
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int console_record_readline(char *str, int maxlen);
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/**
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* console_record_avail() - Get the number of available bytes in console output
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*
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* @return available bytes (0 if empty)
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*/
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int console_record_avail(void);
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/**
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* console_announce_r() - print a U-Boot console on non-serial consoles
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*
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* When U-Boot starts up with a display it generally does not announce itself
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* on the display. The banner is instead emitted on the UART before relocation.
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* This function prints a banner on devices which (we assume) did not receive
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* it before relocation.
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*
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* @return 0 (meaning no errors)
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*/
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int console_announce_r(void);
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/**
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* console_puts_select_stderr() - Output a string to selected console devices
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*
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* This writes to stderr only. It is useful for outputting errors
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*
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* @serial_only: true to output only to serial, false to output to everything
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* else
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* @s: String to output
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*/
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void console_puts_select_stderr(bool serial_only, const char *s);
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/*
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* CONSOLE multiplexing.
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*/
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#ifdef CONFIG_CONSOLE_MUX
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#include <iomux.h>
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#endif
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#endif
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