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u-boot/common/console.c
Simon Glass 493a4c8af7 console: Add a way to output to serial only 
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>
2020-07-09 12:33:24 +08:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2000
* Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
*/
#include <common.h>
#include <console.h>
#include <debug_uart.h>
#include <dm.h>
#include <env.h>
#include <stdarg.h>
#include <iomux.h>
#include <malloc.h>
#include <mapmem.h>
#include <os.h>
#include <serial.h>
#include <stdio_dev.h>
#include <exports.h>
#include <env_internal.h>
#include <watchdog.h>
#include <linux/delay.h>
DECLARE_GLOBAL_DATA_PTR;
static int on_console(const char *name, const char *value, enum env_op op,
int flags)
{
int console = -1;
/* Check for console redirection */
if (strcmp(name, "stdin") == 0)
console = stdin;
else if (strcmp(name, "stdout") == 0)
console = stdout;
else if (strcmp(name, "stderr") == 0)
console = stderr;
/* if not actually setting a console variable, we don't care */
if (console == -1 || (gd->flags & GD_FLG_DEVINIT) == 0)
return 0;
switch (op) {
case env_op_create:
case env_op_overwrite:
#if CONFIG_IS_ENABLED(CONSOLE_MUX)
if (iomux_doenv(console, value))
return 1;
#else
/* Try assigning specified device */
if (console_assign(console, value) < 0)
return 1;
#endif
return 0;
case env_op_delete:
if ((flags & H_FORCE) == 0)
printf("Can't delete \"%s\"\n", name);
return 1;
default:
return 0;
}
}
U_BOOT_ENV_CALLBACK(console, on_console);
#ifdef CONFIG_SILENT_CONSOLE
static int on_silent(const char *name, const char *value, enum env_op op,
int flags)
{
#if !CONFIG_IS_ENABLED(SILENT_CONSOLE_UPDATE_ON_SET)
if (flags & H_INTERACTIVE)
return 0;
#endif
#if !CONFIG_IS_ENABLED(SILENT_CONSOLE_UPDATE_ON_RELOC)
if ((flags & H_INTERACTIVE) == 0)
return 0;
#endif
if (value != NULL)
gd->flags |= GD_FLG_SILENT;
else
gd->flags &= ~GD_FLG_SILENT;
return 0;
}
U_BOOT_ENV_CALLBACK(silent, on_silent);
#endif
#if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
/*
* if overwrite_console returns 1, the stdin, stderr and stdout
* are switched to the serial port, else the settings in the
* environment are used
*/
#ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
extern int overwrite_console(void);
#define OVERWRITE_CONSOLE overwrite_console()
#else
#define OVERWRITE_CONSOLE 0
#endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */
#endif /* CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
static int console_setfile(int file, struct stdio_dev * dev)
{
int error = 0;
if (dev == NULL)
return -1;
switch (file) {
case stdin:
case stdout:
case stderr:
/* Start new device */
if (dev->start) {
error = dev->start(dev);
/* If it's not started dont use it */
if (error < 0)
break;
}
/* Assign the new device (leaving the existing one started) */
stdio_devices[file] = dev;
/*
* Update monitor functions
* (to use the console stuff by other applications)
*/
switch (file) {
case stdin:
gd->jt->getc = getc;
gd->jt->tstc = tstc;
break;
case stdout:
gd->jt->putc = putc;
gd->jt->puts = puts;
gd->jt->printf = printf;
break;
}
break;
default: /* Invalid file ID */
error = -1;
}
return error;
}
/**
* console_dev_is_serial() - Check if a stdio device is a serial device
*
* @sdev: Device to check
* @return true if this device is in the serial uclass (or for pre-driver-model,
* whether it is called "serial".
*/
static bool console_dev_is_serial(struct stdio_dev *sdev)
{
bool is_serial;
#ifdef CONFIG_DM_SERIAL
if (sdev->flags & DEV_FLAGS_DM) {
struct udevice *dev = sdev->priv;
is_serial = device_get_uclass_id(dev) == UCLASS_SERIAL;
} else
#endif
is_serial = !strcmp(sdev->name, "serial");
return is_serial;
}
#if CONFIG_IS_ENABLED(CONSOLE_MUX)
/** Console I/O multiplexing *******************************************/
static struct stdio_dev *tstcdev;
struct stdio_dev **console_devices[MAX_FILES];
int cd_count[MAX_FILES];
/*
* This depends on tstc() always being called before getc().
* This is guaranteed to be true because this routine is called
* only from fgetc() which assures it.
* No attempt is made to demultiplex multiple input sources.
*/
static int console_getc(int file)
{
unsigned char ret;
/* This is never called with testcdev == NULL */
ret = tstcdev->getc(tstcdev);
tstcdev = NULL;
return ret;
}
static int console_tstc(int file)
{
int i, ret;
struct stdio_dev *dev;
int prev;
prev = disable_ctrlc(1);
for (i = 0; i < cd_count[file]; i++) {
dev = console_devices[file][i];
if (dev->tstc != NULL) {
ret = dev->tstc(dev);
if (ret > 0) {
tstcdev = dev;
disable_ctrlc(prev);
return ret;
}
}
}
disable_ctrlc(prev);
return 0;
}
static void console_putc(int file, const char c)
{
int i;
struct stdio_dev *dev;
for (i = 0; i < cd_count[file]; i++) {
dev = console_devices[file][i];
if (dev->putc != NULL)
dev->putc(dev, c);
}
}
/**
* console_puts_select() - Output a string to all console devices
*
* @file: File number to output to (e,g, stdout, see stdio.h)
* @serial_only: true to output only to serial, false to output to everything
* else
* @s: String to output
*/
static void console_puts_select(int file, bool serial_only, const char *s)
{
int i;
struct stdio_dev *dev;
for (i = 0; i < cd_count[file]; i++) {
bool is_serial;
dev = console_devices[file][i];
is_serial = console_dev_is_serial(dev);
if (dev->puts && serial_only == is_serial)
dev->puts(dev, s);
}
}
void console_puts_select_stderr(bool serial_only, const char *s)
{
console_puts_select(stderr, serial_only, s);
}
static void console_puts(int file, const char *s)
{
int i;
struct stdio_dev *dev;
for (i = 0; i < cd_count[file]; i++) {
dev = console_devices[file][i];
if (dev->puts != NULL)
dev->puts(dev, s);
}
}
#if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
static inline void console_doenv(int file, struct stdio_dev *dev)
{
iomux_doenv(file, dev->name);
}
#endif
#else
static inline int console_getc(int file)
{
return stdio_devices[file]->getc(stdio_devices[file]);
}
static inline int console_tstc(int file)
{
return stdio_devices[file]->tstc(stdio_devices[file]);
}
static inline void console_putc(int file, const char c)
{
stdio_devices[file]->putc(stdio_devices[file], c);
}
void console_puts_select(int file, bool serial_only, const char *s)
{
if (serial_only == console_dev_is_serial(stdio_devices[file]))
stdio_devices[file]->puts(stdio_devices[file], s);
}
static inline void console_puts(int file, const char *s)
{
stdio_devices[file]->puts(stdio_devices[file], s);
}
#if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
static inline void console_doenv(int file, struct stdio_dev *dev)
{
console_setfile(file, dev);
}
#endif
#endif /* CONIFIG_IS_ENABLED(CONSOLE_MUX) */
/** U-Boot INITIAL CONSOLE-NOT COMPATIBLE FUNCTIONS *************************/
int serial_printf(const char *fmt, ...)
{
va_list args;
uint i;
char printbuffer[CONFIG_SYS_PBSIZE];
va_start(args, fmt);
/* For this to work, printbuffer must be larger than
* anything we ever want to print.
*/
i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
va_end(args);
serial_puts(printbuffer);
return i;
}
int fgetc(int file)
{
if (file < MAX_FILES) {
/*
* Effectively poll for input wherever it may be available.
*/
for (;;) {
WATCHDOG_RESET();
#if CONFIG_IS_ENABLED(CONSOLE_MUX)
/*
* Upper layer may have already called tstc() so
* check for that first.
*/
if (tstcdev != NULL)
return console_getc(file);
console_tstc(file);
#else
if (console_tstc(file))
return console_getc(file);
#endif
#ifdef CONFIG_WATCHDOG
/*
* If the watchdog must be rate-limited then it should
* already be handled in board-specific code.
*/
udelay(1);
#endif
}
}
return -1;
}
int ftstc(int file)
{
if (file < MAX_FILES)
return console_tstc(file);
return -1;
}
void fputc(int file, const char c)
{
if (file < MAX_FILES)
console_putc(file, c);
}
void fputs(int file, const char *s)
{
if (file < MAX_FILES)
console_puts(file, s);
}
int fprintf(int file, const char *fmt, ...)
{
va_list args;
uint i;
char printbuffer[CONFIG_SYS_PBSIZE];
va_start(args, fmt);
/* For this to work, printbuffer must be larger than
* anything we ever want to print.
*/
i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
va_end(args);
/* Send to desired file */
fputs(file, printbuffer);
return i;
}
/** U-Boot INITIAL CONSOLE-COMPATIBLE FUNCTION *****************************/
int getc(void)
{
#ifdef CONFIG_DISABLE_CONSOLE
if (gd->flags & GD_FLG_DISABLE_CONSOLE)
return 0;
#endif
if (!gd->have_console)
return 0;
#ifdef CONFIG_CONSOLE_RECORD
if (gd->console_in.start) {
int ch;
ch = membuff_getbyte((struct membuff *)&gd->console_in);
if (ch != -1)
return 1;
}
#endif
if (gd->flags & GD_FLG_DEVINIT) {
/* Get from the standard input */
return fgetc(stdin);
}
/* Send directly to the handler */
return serial_getc();
}
int tstc(void)
{
#ifdef CONFIG_DISABLE_CONSOLE
if (gd->flags & GD_FLG_DISABLE_CONSOLE)
return 0;
#endif
if (!gd->have_console)
return 0;
#ifdef CONFIG_CONSOLE_RECORD
if (gd->console_in.start) {
if (membuff_peekbyte((struct membuff *)&gd->console_in) != -1)
return 1;
}
#endif
if (gd->flags & GD_FLG_DEVINIT) {
/* Test the standard input */
return ftstc(stdin);
}
/* Send directly to the handler */
return serial_tstc();
}
#define PRE_CONSOLE_FLUSHPOINT1_SERIAL 0
#define PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL 1
#if CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
#define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_PRE_CON_BUF_SZ)
static void pre_console_putc(const char c)
{
char *buffer;
buffer = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
buffer[CIRC_BUF_IDX(gd->precon_buf_idx++)] = c;
unmap_sysmem(buffer);
}
static void pre_console_puts(const char *s)
{
while (*s)
pre_console_putc(*s++);
}
static void print_pre_console_buffer(int flushpoint)
{
unsigned long in = 0, out = 0;
char buf_out[CONFIG_PRE_CON_BUF_SZ + 1];
char *buf_in;
#ifdef CONFIG_SILENT_CONSOLE
if (gd->flags & GD_FLG_SILENT)
return;
#endif
buf_in = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
if (gd->precon_buf_idx > CONFIG_PRE_CON_BUF_SZ)
in = gd->precon_buf_idx - CONFIG_PRE_CON_BUF_SZ;
while (in < gd->precon_buf_idx)
buf_out[out++] = buf_in[CIRC_BUF_IDX(in++)];
unmap_sysmem(buf_in);
buf_out[out] = 0;
switch (flushpoint) {
case PRE_CONSOLE_FLUSHPOINT1_SERIAL:
puts(buf_out);
break;
case PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL:
console_puts_select(stdout, false, buf_out);
break;
}
}
#else
static inline void pre_console_putc(const char c) {}
static inline void pre_console_puts(const char *s) {}
static inline void print_pre_console_buffer(int flushpoint) {}
#endif
void putc(const char c)
{
#ifdef CONFIG_SANDBOX
/* sandbox can send characters to stdout before it has a console */
if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
os_putc(c);
return;
}
#endif
#ifdef CONFIG_DEBUG_UART
/* if we don't have a console yet, use the debug UART */
if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
printch(c);
return;
}
#endif
if (!gd)
return;
#ifdef CONFIG_CONSOLE_RECORD
if ((gd->flags & GD_FLG_RECORD) && gd->console_out.start)
membuff_putbyte((struct membuff *)&gd->console_out, c);
#endif
#ifdef CONFIG_SILENT_CONSOLE
if (gd->flags & GD_FLG_SILENT) {
if (!(gd->flags & GD_FLG_DEVINIT))
pre_console_putc(c);
return;
}
#endif
#ifdef CONFIG_DISABLE_CONSOLE
if (gd->flags & GD_FLG_DISABLE_CONSOLE)
return;
#endif
if (!gd->have_console)
return pre_console_putc(c);
if (gd->flags & GD_FLG_DEVINIT) {
/* Send to the standard output */
fputc(stdout, c);
} else {
/* Send directly to the handler */
pre_console_putc(c);
serial_putc(c);
}
}
void puts(const char *s)
{
#ifdef CONFIG_SANDBOX
/* sandbox can send characters to stdout before it has a console */
if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
os_puts(s);
return;
}
#endif
#ifdef CONFIG_DEBUG_UART
if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
while (*s) {
int ch = *s++;
printch(ch);
}
return;
}
#endif
if (!gd)
return;
#ifdef CONFIG_CONSOLE_RECORD
if ((gd->flags & GD_FLG_RECORD) && gd->console_out.start)
membuff_put((struct membuff *)&gd->console_out, s, strlen(s));
#endif
#ifdef CONFIG_SILENT_CONSOLE
if (gd->flags & GD_FLG_SILENT) {
if (!(gd->flags & GD_FLG_DEVINIT))
pre_console_puts(s);
return;
}
#endif
#ifdef CONFIG_DISABLE_CONSOLE
if (gd->flags & GD_FLG_DISABLE_CONSOLE)
return;
#endif
if (!gd->have_console)
return pre_console_puts(s);
if (gd->flags & GD_FLG_DEVINIT) {
/* Send to the standard output */
fputs(stdout, s);
} else {
/* Send directly to the handler */
pre_console_puts(s);
serial_puts(s);
}
}
#ifdef CONFIG_CONSOLE_RECORD
int console_record_init(void)
{
int ret;
ret = membuff_new((struct membuff *)&gd->console_out,
CONFIG_CONSOLE_RECORD_OUT_SIZE);
if (ret)
return ret;
ret = membuff_new((struct membuff *)&gd->console_in,
CONFIG_CONSOLE_RECORD_IN_SIZE);
return ret;
}
void console_record_reset(void)
{
membuff_purge((struct membuff *)&gd->console_out);
membuff_purge((struct membuff *)&gd->console_in);
}
void console_record_reset_enable(void)
{
console_record_reset();
gd->flags |= GD_FLG_RECORD;
}
int console_record_readline(char *str, int maxlen)
{
return membuff_readline((struct membuff *)&gd->console_out, str,
maxlen, ' ');
}
int console_record_avail(void)
{
return membuff_avail((struct membuff *)&gd->console_out);
}
#endif
/* test if ctrl-c was pressed */
static int ctrlc_disabled = 0; /* see disable_ctrl() */
static int ctrlc_was_pressed = 0;
int ctrlc(void)
{
if (!ctrlc_disabled && gd->have_console) {
if (tstc()) {
switch (getc()) {
case 0x03: /* ^C - Control C */
ctrlc_was_pressed = 1;
return 1;
default:
break;
}
}
}
return 0;
}
/* Reads user's confirmation.
Returns 1 if user's input is "y", "Y", "yes" or "YES"
*/
int confirm_yesno(void)
{
int i;
char str_input[5];
/* Flush input */
while (tstc())
getc();
i = 0;
while (i < sizeof(str_input)) {
str_input[i] = getc();
putc(str_input[i]);
if (str_input[i] == '\r')
break;
i++;
}
putc('\n');
if (strncmp(str_input, "y\r", 2) == 0 ||
strncmp(str_input, "Y\r", 2) == 0 ||
strncmp(str_input, "yes\r", 4) == 0 ||
strncmp(str_input, "YES\r", 4) == 0)
return 1;
return 0;
}
/* pass 1 to disable ctrlc() checking, 0 to enable.
* returns previous state
*/
int disable_ctrlc(int disable)
{
int prev = ctrlc_disabled; /* save previous state */
ctrlc_disabled = disable;
return prev;
}
int had_ctrlc (void)
{
return ctrlc_was_pressed;
}
void clear_ctrlc(void)
{
ctrlc_was_pressed = 0;
}
/** U-Boot INIT FUNCTIONS *************************************************/
struct stdio_dev *search_device(int flags, const char *name)
{
struct stdio_dev *dev;
dev = stdio_get_by_name(name);
#ifdef CONFIG_VIDCONSOLE_AS_LCD
if (!dev && !strcmp(name, CONFIG_VIDCONSOLE_AS_NAME))
dev = stdio_get_by_name("vidconsole");
#endif
if (dev && (dev->flags & flags))
return dev;
return NULL;
}
int console_assign(int file, const char *devname)
{
int flag;
struct stdio_dev *dev;
/* Check for valid file */
switch (file) {
case stdin:
flag = DEV_FLAGS_INPUT;
break;
case stdout:
case stderr:
flag = DEV_FLAGS_OUTPUT;
break;
default:
return -1;
}
/* Check for valid device name */
dev = search_device(flag, devname);
if (dev)
return console_setfile(file, dev);
return -1;
}
/* return true if the 'silent' flag is removed */
static bool console_update_silent(void)
{
#ifdef CONFIG_SILENT_CONSOLE
if (env_get("silent")) {
gd->flags |= GD_FLG_SILENT;
} else {
unsigned long flags = gd->flags;
gd->flags &= ~GD_FLG_SILENT;
return !!(flags & GD_FLG_SILENT);
}
#endif
return false;
}
int console_announce_r(void)
{
#if !CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
char buf[DISPLAY_OPTIONS_BANNER_LENGTH];
display_options_get_banner(false, buf, sizeof(buf));
console_puts_select(stdout, false, buf);
#endif
return 0;
}
/* Called before relocation - use serial functions */
int console_init_f(void)
{
gd->have_console = 1;
console_update_silent();
print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT1_SERIAL);
return 0;
}
void stdio_print_current_devices(void)
{
/* Print information */
puts("In: ");
if (stdio_devices[stdin] == NULL) {
puts("No input devices available!\n");
} else {
printf ("%s\n", stdio_devices[stdin]->name);
}
puts("Out: ");
if (stdio_devices[stdout] == NULL) {
puts("No output devices available!\n");
} else {
printf ("%s\n", stdio_devices[stdout]->name);
}
puts("Err: ");
if (stdio_devices[stderr] == NULL) {
puts("No error devices available!\n");
} else {
printf ("%s\n", stdio_devices[stderr]->name);
}
}
#if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
/* Called after the relocation - use desired console functions */
int console_init_r(void)
{
char *stdinname, *stdoutname, *stderrname;
struct stdio_dev *inputdev = NULL, *outputdev = NULL, *errdev = NULL;
#ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
int i;
#endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
#if CONFIG_IS_ENABLED(CONSOLE_MUX)
int iomux_err = 0;
#endif
int flushpoint;
/* update silent for env loaded from flash (initr_env) */
if (console_update_silent())
flushpoint = PRE_CONSOLE_FLUSHPOINT1_SERIAL;
else
flushpoint = PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL;
/* set default handlers at first */
gd->jt->getc = serial_getc;
gd->jt->tstc = serial_tstc;
gd->jt->putc = serial_putc;
gd->jt->puts = serial_puts;
gd->jt->printf = serial_printf;
/* stdin stdout and stderr are in environment */
/* scan for it */
stdinname = env_get("stdin");
stdoutname = env_get("stdout");
stderrname = env_get("stderr");
if (OVERWRITE_CONSOLE == 0) { /* if not overwritten by config switch */
inputdev = search_device(DEV_FLAGS_INPUT, stdinname);
outputdev = search_device(DEV_FLAGS_OUTPUT, stdoutname);
errdev = search_device(DEV_FLAGS_OUTPUT, stderrname);
#if CONFIG_IS_ENABLED(CONSOLE_MUX)
iomux_err = iomux_doenv(stdin, stdinname);
iomux_err += iomux_doenv(stdout, stdoutname);
iomux_err += iomux_doenv(stderr, stderrname);
if (!iomux_err)
/* Successful, so skip all the code below. */
goto done;
#endif
}
/* if the devices are overwritten or not found, use default device */
if (inputdev == NULL) {
inputdev = search_device(DEV_FLAGS_INPUT, "serial");
}
if (outputdev == NULL) {
outputdev = search_device(DEV_FLAGS_OUTPUT, "serial");
}
if (errdev == NULL) {
errdev = search_device(DEV_FLAGS_OUTPUT, "serial");
}
/* Initializes output console first */
if (outputdev != NULL) {
/* need to set a console if not done above. */
console_doenv(stdout, outputdev);
}
if (errdev != NULL) {
/* need to set a console if not done above. */
console_doenv(stderr, errdev);
}
if (inputdev != NULL) {
/* need to set a console if not done above. */
console_doenv(stdin, inputdev);
}
#if CONFIG_IS_ENABLED(CONSOLE_MUX)
done:
#endif
#ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
stdio_print_current_devices();
#endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
#ifdef CONFIG_VIDCONSOLE_AS_LCD
if (strstr(stdoutname, CONFIG_VIDCONSOLE_AS_NAME))
printf("Warning: Please change '%s' to 'vidconsole' in stdout/stderr environment vars\n",
CONFIG_VIDCONSOLE_AS_NAME);
#endif
#ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
/* set the environment variables (will overwrite previous env settings) */
for (i = 0; i < MAX_FILES; i++) {
env_set(stdio_names[i], stdio_devices[i]->name);
}
#endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
gd->flags |= GD_FLG_DEVINIT; /* device initialization completed */
#if 0
/* If nothing usable installed, use only the initial console */
if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
return 0;
#endif
print_pre_console_buffer(flushpoint);
return 0;
}
#else /* !CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
/* Called after the relocation - use desired console functions */
int console_init_r(void)
{
struct stdio_dev *inputdev = NULL, *outputdev = NULL;
int i;
struct list_head *list = stdio_get_list();
struct list_head *pos;
struct stdio_dev *dev;
int flushpoint;
/* update silent for env loaded from flash (initr_env) */
if (console_update_silent())
flushpoint = PRE_CONSOLE_FLUSHPOINT1_SERIAL;
else
flushpoint = PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL;
#ifdef CONFIG_SPLASH_SCREEN
/*
* suppress all output if splash screen is enabled and we have
* a bmp to display. We redirect the output from frame buffer
* console to serial console in this case or suppress it if
* "silent" mode was requested.
*/
if (env_get("splashimage") != NULL) {
if (!(gd->flags & GD_FLG_SILENT))
outputdev = search_device (DEV_FLAGS_OUTPUT, "serial");
}
#endif
/* Scan devices looking for input and output devices */
list_for_each(pos, list) {
dev = list_entry(pos, struct stdio_dev, list);
if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) {
inputdev = dev;
}
if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) {
outputdev = dev;
}
if(inputdev && outputdev)
break;
}
/* Initializes output console first */
if (outputdev != NULL) {
console_setfile(stdout, outputdev);
console_setfile(stderr, outputdev);
#if CONFIG_IS_ENABLED(CONSOLE_MUX)
console_devices[stdout][0] = outputdev;
console_devices[stderr][0] = outputdev;
#endif
}
/* Initializes input console */
if (inputdev != NULL) {
console_setfile(stdin, inputdev);
#if CONFIG_IS_ENABLED(CONSOLE_MUX)
console_devices[stdin][0] = inputdev;
#endif
}
#ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
stdio_print_current_devices();
#endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
/* Setting environment variables */
for (i = 0; i < MAX_FILES; i++) {
env_set(stdio_names[i], stdio_devices[i]->name);
}
gd->flags |= GD_FLG_DEVINIT; /* device initialization completed */
#if 0
/* If nothing usable installed, use only the initial console */
if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
return 0;
#endif
print_pre_console_buffer(flushpoint);
return 0;
}
#endif /* CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
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