1 // SPDX-License-Identifier: GPL-2.0+
4 * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
9 #include <debug_uart.h>
18 #include <stdio_dev.h>
20 #include <env_internal.h>
22 #include <asm/global_data.h>
23 #include <linux/delay.h>
25 DECLARE_GLOBAL_DATA_PTR;
27 static int on_console(const char *name, const char *value, enum env_op op,
32 /* Check for console redirection */
33 if (strcmp(name, "stdin") == 0)
35 else if (strcmp(name, "stdout") == 0)
37 else if (strcmp(name, "stderr") == 0)
40 /* if not actually setting a console variable, we don't care */
41 if (console == -1 || (gd->flags & GD_FLG_DEVINIT) == 0)
46 case env_op_overwrite:
48 if (CONFIG_IS_ENABLED(CONSOLE_MUX)) {
49 if (iomux_doenv(console, value))
52 /* Try assigning specified device */
53 if (console_assign(console, value) < 0)
60 if ((flags & H_FORCE) == 0)
61 printf("Can't delete \"%s\"\n", name);
68 U_BOOT_ENV_CALLBACK(console, on_console);
70 #ifdef CONFIG_SILENT_CONSOLE
71 static int on_silent(const char *name, const char *value, enum env_op op,
74 if (!CONFIG_IS_ENABLED(SILENT_CONSOLE_UPDATE_ON_SET))
75 if (flags & H_INTERACTIVE)
78 if (!CONFIG_IS_ENABLED(SILENT_CONSOLE_UPDATE_ON_RELOC))
79 if ((flags & H_INTERACTIVE) == 0)
83 gd->flags |= GD_FLG_SILENT;
85 gd->flags &= ~GD_FLG_SILENT;
89 U_BOOT_ENV_CALLBACK(silent, on_silent);
92 #ifdef CONFIG_CONSOLE_RECORD
93 /* helper function: access to gd->console_out and gd->console_in */
94 static void console_record_putc(const char c)
96 if (!(gd->flags & GD_FLG_RECORD))
98 if (gd->console_out.start &&
99 !membuff_putbyte((struct membuff *)&gd->console_out, c))
100 gd->flags |= GD_FLG_RECORD_OVF;
103 static void console_record_puts(const char *s)
105 if (!(gd->flags & GD_FLG_RECORD))
107 if (gd->console_out.start) {
110 if (membuff_put((struct membuff *)&gd->console_out, s, len) !=
112 gd->flags |= GD_FLG_RECORD_OVF;
116 static int console_record_getc(void)
118 if (!(gd->flags & GD_FLG_RECORD))
120 if (!gd->console_in.start)
123 return membuff_getbyte((struct membuff *)&gd->console_in);
126 static int console_record_tstc(void)
128 if (!(gd->flags & GD_FLG_RECORD))
130 if (gd->console_in.start) {
131 if (membuff_peekbyte((struct membuff *)&gd->console_in) != -1)
137 static void console_record_putc(char c)
141 static void console_record_puts(const char *s)
145 static int console_record_getc(void)
150 static int console_record_tstc(void)
156 #if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
158 * if overwrite_console returns 1, the stdin, stderr and stdout
159 * are switched to the serial port, else the settings in the
160 * environment are used
162 #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
163 extern int overwrite_console(void);
164 #define OVERWRITE_CONSOLE overwrite_console()
166 #define OVERWRITE_CONSOLE 0
167 #endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */
169 #endif /* CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
171 static int console_setfile(int file, struct stdio_dev * dev)
182 error = console_start(file, dev);
186 /* Assign the new device (leaving the existing one started) */
187 stdio_devices[file] = dev;
190 * Update monitor functions
191 * (to use the console stuff by other applications)
195 gd->jt->getc = getchar;
201 gd->jt->printf = printf;
206 default: /* Invalid file ID */
213 * console_dev_is_serial() - Check if a stdio device is a serial device
215 * @sdev: Device to check
216 * Return: true if this device is in the serial uclass (or for pre-driver-model,
217 * whether it is called "serial".
219 static bool console_dev_is_serial(struct stdio_dev *sdev)
223 if (IS_ENABLED(CONFIG_DM_SERIAL) && (sdev->flags & DEV_FLAGS_DM)) {
224 struct udevice *dev = sdev->priv;
226 is_serial = device_get_uclass_id(dev) == UCLASS_SERIAL;
228 is_serial = !strcmp(sdev->name, "serial");
234 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
235 /** Console I/O multiplexing *******************************************/
237 /* tstcdev: save the last stdio device with pending characters, with tstc != 0 */
238 static struct stdio_dev *tstcdev;
239 struct stdio_dev **console_devices[MAX_FILES];
240 int cd_count[MAX_FILES];
242 static void console_devices_set(int file, struct stdio_dev *dev)
244 console_devices[file][0] = dev;
249 * console_needs_start_stop() - check if we need to start or stop the STDIO device
251 * @sdev: STDIO device in question
253 * This function checks if we need to start or stop the stdio device used for
254 * a console. For IOMUX case it simply enforces one time start and one time
255 * stop of the device independently of how many STDIO files are using it. In
256 * other words, we start console once before first STDIO device wants it and
257 * stop after the last is gone.
259 static bool console_needs_start_stop(int file, struct stdio_dev *sdev)
263 for (i = 0; i < ARRAY_SIZE(cd_count); i++) {
267 if (iomux_match_device(console_devices[i], cd_count[i], sdev) >= 0)
274 * This depends on tstc() always being called before getchar().
275 * This is guaranteed to be true because this routine is called
276 * only from fgetc() which assures it.
277 * No attempt is made to demultiplex multiple input sources.
279 static int console_getc(int file)
283 /* This is never called with testcdev == NULL */
284 ret = tstcdev->getc(tstcdev);
289 /* Upper layer may have already called tstc(): check the saved result */
290 static bool console_has_tstc(void)
295 static int console_tstc(int file)
298 struct stdio_dev *dev;
301 prev = disable_ctrlc(1);
302 for_each_console_dev(i, file, dev) {
303 if (dev->tstc != NULL) {
304 ret = dev->tstc(dev);
317 static void console_putc(int file, const char c)
320 struct stdio_dev *dev;
322 for_each_console_dev(i, file, dev) {
323 if (dev->putc != NULL)
329 * console_puts_select() - Output a string to all console devices
331 * @file: File number to output to (e,g, stdout, see stdio.h)
332 * @serial_only: true to output only to serial, false to output to everything
334 * @s: String to output
336 static void console_puts_select(int file, bool serial_only, const char *s)
339 struct stdio_dev *dev;
341 for_each_console_dev(i, file, dev) {
342 bool is_serial = console_dev_is_serial(dev);
344 if (dev->puts && serial_only == is_serial)
349 void console_puts_select_stderr(bool serial_only, const char *s)
351 if (gd->flags & GD_FLG_DEVINIT)
352 console_puts_select(stderr, serial_only, s);
355 static void console_puts(int file, const char *s)
358 struct stdio_dev *dev;
360 for_each_console_dev(i, file, dev) {
361 if (dev->puts != NULL)
366 #if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
367 static inline void console_doenv(int file, struct stdio_dev *dev)
369 iomux_doenv(file, dev->name);
374 static void console_devices_set(int file, struct stdio_dev *dev)
378 static inline bool console_needs_start_stop(int file, struct stdio_dev *sdev)
383 static inline int console_getc(int file)
385 return stdio_devices[file]->getc(stdio_devices[file]);
388 static bool console_has_tstc(void)
393 static inline int console_tstc(int file)
395 return stdio_devices[file]->tstc(stdio_devices[file]);
398 static inline void console_putc(int file, const char c)
400 stdio_devices[file]->putc(stdio_devices[file], c);
403 void console_puts_select(int file, bool serial_only, const char *s)
405 if ((gd->flags & GD_FLG_DEVINIT) &&
406 serial_only == console_dev_is_serial(stdio_devices[file]))
407 stdio_devices[file]->puts(stdio_devices[file], s);
410 static inline void console_puts(int file, const char *s)
412 stdio_devices[file]->puts(stdio_devices[file], s);
415 #if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
416 static inline void console_doenv(int file, struct stdio_dev *dev)
418 console_setfile(file, dev);
421 #endif /* CONIFIG_IS_ENABLED(CONSOLE_MUX) */
423 static void __maybe_unused console_setfile_and_devices(int file, struct stdio_dev *dev)
425 console_setfile(file, dev);
426 console_devices_set(file, dev);
429 int console_start(int file, struct stdio_dev *sdev)
433 if (!console_needs_start_stop(file, sdev))
436 /* Start new device */
438 error = sdev->start(sdev);
439 /* If it's not started don't use it */
446 void console_stop(int file, struct stdio_dev *sdev)
448 if (!console_needs_start_stop(file, sdev))
455 /** U-Boot INITIAL CONSOLE-NOT COMPATIBLE FUNCTIONS *************************/
457 int serial_printf(const char *fmt, ...)
461 char printbuffer[CONFIG_SYS_PBSIZE];
465 /* For this to work, printbuffer must be larger than
466 * anything we ever want to print.
468 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
471 serial_puts(printbuffer);
477 if (file < MAX_FILES) {
479 * Effectively poll for input wherever it may be available.
483 if (CONFIG_IS_ENABLED(CONSOLE_MUX)) {
485 * Upper layer may have already called tstc() so
486 * check for that first.
488 if (console_has_tstc())
489 return console_getc(file);
492 if (console_tstc(file))
493 return console_getc(file);
497 * If the watchdog must be rate-limited then it should
498 * already be handled in board-specific code.
500 if (IS_ENABLED(CONFIG_WATCHDOG))
510 if (file < MAX_FILES)
511 return console_tstc(file);
516 void fputc(int file, const char c)
518 if (file < MAX_FILES)
519 console_putc(file, c);
522 void fputs(int file, const char *s)
524 if (file < MAX_FILES)
525 console_puts(file, s);
528 int fprintf(int file, const char *fmt, ...)
532 char printbuffer[CONFIG_SYS_PBSIZE];
536 /* For this to work, printbuffer must be larger than
537 * anything we ever want to print.
539 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
542 /* Send to desired file */
543 fputs(file, printbuffer);
547 /** U-Boot INITIAL CONSOLE-COMPATIBLE FUNCTION *****************************/
553 if (IS_ENABLED(CONFIG_DISABLE_CONSOLE) && (gd->flags & GD_FLG_DISABLE_CONSOLE))
556 if (!gd->have_console)
559 ch = console_record_getc();
563 if (gd->flags & GD_FLG_DEVINIT) {
564 /* Get from the standard input */
568 /* Send directly to the handler */
569 return serial_getc();
574 if (IS_ENABLED(CONFIG_DISABLE_CONSOLE) && (gd->flags & GD_FLG_DISABLE_CONSOLE))
577 if (!gd->have_console)
580 if (console_record_tstc())
583 if (gd->flags & GD_FLG_DEVINIT) {
584 /* Test the standard input */
588 /* Send directly to the handler */
589 return serial_tstc();
592 #define PRE_CONSOLE_FLUSHPOINT1_SERIAL 0
593 #define PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL 1
595 #if CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
596 #define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_PRE_CON_BUF_SZ)
598 static void pre_console_putc(const char c)
602 buffer = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
604 buffer[CIRC_BUF_IDX(gd->precon_buf_idx++)] = c;
606 unmap_sysmem(buffer);
609 static void pre_console_puts(const char *s)
612 pre_console_putc(*s++);
615 static void print_pre_console_buffer(int flushpoint)
617 unsigned long in = 0, out = 0;
618 char buf_out[CONFIG_PRE_CON_BUF_SZ + 1];
621 if (IS_ENABLED(CONFIG_SILENT_CONSOLE) && (gd->flags & GD_FLG_SILENT))
624 buf_in = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
625 if (gd->precon_buf_idx > CONFIG_PRE_CON_BUF_SZ)
626 in = gd->precon_buf_idx - CONFIG_PRE_CON_BUF_SZ;
628 while (in < gd->precon_buf_idx)
629 buf_out[out++] = buf_in[CIRC_BUF_IDX(in++)];
630 unmap_sysmem(buf_in);
634 switch (flushpoint) {
635 case PRE_CONSOLE_FLUSHPOINT1_SERIAL:
638 case PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL:
639 console_puts_select(stdout, false, buf_out);
644 static inline void pre_console_putc(const char c) {}
645 static inline void pre_console_puts(const char *s) {}
646 static inline void print_pre_console_buffer(int flushpoint) {}
649 void putc(const char c)
654 console_record_putc(c);
656 /* sandbox can send characters to stdout before it has a console */
657 if (IS_ENABLED(CONFIG_SANDBOX) && !(gd->flags & GD_FLG_SERIAL_READY)) {
662 /* if we don't have a console yet, use the debug UART */
663 if (IS_ENABLED(CONFIG_DEBUG_UART) && !(gd->flags & GD_FLG_SERIAL_READY)) {
668 if (IS_ENABLED(CONFIG_SILENT_CONSOLE) && (gd->flags & GD_FLG_SILENT)) {
669 if (!(gd->flags & GD_FLG_DEVINIT))
674 if (IS_ENABLED(CONFIG_DISABLE_CONSOLE) && (gd->flags & GD_FLG_DISABLE_CONSOLE))
677 if (!gd->have_console)
678 return pre_console_putc(c);
680 if (gd->flags & GD_FLG_DEVINIT) {
681 /* Send to the standard output */
684 /* Send directly to the handler */
690 void puts(const char *s)
695 console_record_puts(s);
697 /* sandbox can send characters to stdout before it has a console */
698 if (IS_ENABLED(CONFIG_SANDBOX) && !(gd->flags & GD_FLG_SERIAL_READY)) {
703 if (IS_ENABLED(CONFIG_DEBUG_UART) && !(gd->flags & GD_FLG_SERIAL_READY)) {
712 if (IS_ENABLED(CONFIG_SILENT_CONSOLE) && (gd->flags & GD_FLG_SILENT)) {
713 if (!(gd->flags & GD_FLG_DEVINIT))
718 if (IS_ENABLED(CONFIG_DISABLE_CONSOLE) && (gd->flags & GD_FLG_DISABLE_CONSOLE))
721 if (!gd->have_console)
722 return pre_console_puts(s);
724 if (gd->flags & GD_FLG_DEVINIT) {
725 /* Send to the standard output */
728 /* Send directly to the handler */
734 #ifdef CONFIG_CONSOLE_RECORD
735 int console_record_init(void)
739 ret = membuff_new((struct membuff *)&gd->console_out,
740 gd->flags & GD_FLG_RELOC ?
741 CONFIG_CONSOLE_RECORD_OUT_SIZE :
742 CONFIG_CONSOLE_RECORD_OUT_SIZE_F);
745 ret = membuff_new((struct membuff *)&gd->console_in,
746 CONFIG_CONSOLE_RECORD_IN_SIZE);
751 void console_record_reset(void)
753 membuff_purge((struct membuff *)&gd->console_out);
754 membuff_purge((struct membuff *)&gd->console_in);
755 gd->flags &= ~GD_FLG_RECORD_OVF;
758 int console_record_reset_enable(void)
760 console_record_reset();
761 gd->flags |= GD_FLG_RECORD;
766 int console_record_readline(char *str, int maxlen)
768 if (gd->flags & GD_FLG_RECORD_OVF)
771 return membuff_readline((struct membuff *)&gd->console_out, str,
775 int console_record_avail(void)
777 return membuff_avail((struct membuff *)&gd->console_out);
780 int console_in_puts(const char *str)
782 return membuff_put((struct membuff *)&gd->console_in, str, strlen(str));
787 /* test if ctrl-c was pressed */
788 static int ctrlc_disabled = 0; /* see disable_ctrl() */
789 static int ctrlc_was_pressed = 0;
792 if (!ctrlc_disabled && gd->have_console) {
795 case 0x03: /* ^C - Control C */
796 ctrlc_was_pressed = 1;
806 /* Reads user's confirmation.
807 Returns 1 if user's input is "y", "Y", "yes" or "YES"
809 int confirm_yesno(void)
818 while (i < sizeof(str_input)) {
819 str_input[i] = getchar();
821 if (str_input[i] == '\r')
826 if (strncmp(str_input, "y\r", 2) == 0 ||
827 strncmp(str_input, "Y\r", 2) == 0 ||
828 strncmp(str_input, "yes\r", 4) == 0 ||
829 strncmp(str_input, "YES\r", 4) == 0)
833 /* pass 1 to disable ctrlc() checking, 0 to enable.
834 * returns previous state
836 int disable_ctrlc(int disable)
838 int prev = ctrlc_disabled; /* save previous state */
840 ctrlc_disabled = disable;
846 return ctrlc_was_pressed;
849 void clear_ctrlc(void)
851 ctrlc_was_pressed = 0;
854 /** U-Boot INIT FUNCTIONS *************************************************/
856 struct stdio_dev *console_search_dev(int flags, const char *name)
858 struct stdio_dev *dev;
860 dev = stdio_get_by_name(name);
861 #ifdef CONFIG_VIDCONSOLE_AS_LCD
862 if (!dev && !strcmp(name, CONFIG_VIDCONSOLE_AS_NAME))
863 dev = stdio_get_by_name("vidconsole");
866 if (dev && (dev->flags & flags))
872 int console_assign(int file, const char *devname)
875 struct stdio_dev *dev;
877 /* Check for valid file */
878 flag = stdio_file_to_flags(file);
882 /* Check for valid device name */
884 dev = console_search_dev(flag, devname);
887 return console_setfile(file, dev);
892 /* return true if the 'silent' flag is removed */
893 static bool console_update_silent(void)
895 unsigned long flags = gd->flags;
897 if (!IS_ENABLED(CONFIG_SILENT_CONSOLE))
900 if (env_get("silent")) {
901 gd->flags |= GD_FLG_SILENT;
905 gd->flags &= ~GD_FLG_SILENT;
907 return !!(flags & GD_FLG_SILENT);
910 int console_announce_r(void)
912 #if !CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
913 char buf[DISPLAY_OPTIONS_BANNER_LENGTH];
915 display_options_get_banner(false, buf, sizeof(buf));
917 console_puts_select(stdout, false, buf);
923 /* Called before relocation - use serial functions */
924 int console_init_f(void)
926 gd->have_console = 1;
928 console_update_silent();
930 print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT1_SERIAL);
935 void stdio_print_current_devices(void)
937 /* Print information */
939 if (stdio_devices[stdin] == NULL) {
940 puts("No input devices available!\n");
942 printf ("%s\n", stdio_devices[stdin]->name);
946 if (stdio_devices[stdout] == NULL) {
947 puts("No output devices available!\n");
949 printf ("%s\n", stdio_devices[stdout]->name);
953 if (stdio_devices[stderr] == NULL) {
954 puts("No error devices available!\n");
956 printf ("%s\n", stdio_devices[stderr]->name);
960 #if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
961 /* Called after the relocation - use desired console functions */
962 int console_init_r(void)
964 char *stdinname, *stdoutname, *stderrname;
965 struct stdio_dev *inputdev = NULL, *outputdev = NULL, *errdev = NULL;
970 /* update silent for env loaded from flash (initr_env) */
971 if (console_update_silent())
972 flushpoint = PRE_CONSOLE_FLUSHPOINT1_SERIAL;
974 flushpoint = PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL;
976 /* set default handlers at first */
977 gd->jt->getc = serial_getc;
978 gd->jt->tstc = serial_tstc;
979 gd->jt->putc = serial_putc;
980 gd->jt->puts = serial_puts;
981 gd->jt->printf = serial_printf;
983 /* stdin stdout and stderr are in environment */
985 stdinname = env_get("stdin");
986 stdoutname = env_get("stdout");
987 stderrname = env_get("stderr");
989 if (OVERWRITE_CONSOLE == 0) { /* if not overwritten by config switch */
990 inputdev = console_search_dev(DEV_FLAGS_INPUT, stdinname);
991 outputdev = console_search_dev(DEV_FLAGS_OUTPUT, stdoutname);
992 errdev = console_search_dev(DEV_FLAGS_OUTPUT, stderrname);
993 if (CONFIG_IS_ENABLED(CONSOLE_MUX)) {
994 iomux_err = iomux_doenv(stdin, stdinname);
995 iomux_err += iomux_doenv(stdout, stdoutname);
996 iomux_err += iomux_doenv(stderr, stderrname);
998 /* Successful, so skip all the code below. */
1002 /* if the devices are overwritten or not found, use default device */
1003 if (inputdev == NULL) {
1004 inputdev = console_search_dev(DEV_FLAGS_INPUT, "serial");
1006 if (outputdev == NULL) {
1007 outputdev = console_search_dev(DEV_FLAGS_OUTPUT, "serial");
1009 if (errdev == NULL) {
1010 errdev = console_search_dev(DEV_FLAGS_OUTPUT, "serial");
1012 /* Initializes output console first */
1013 if (outputdev != NULL) {
1014 /* need to set a console if not done above. */
1015 console_doenv(stdout, outputdev);
1017 if (errdev != NULL) {
1018 /* need to set a console if not done above. */
1019 console_doenv(stderr, errdev);
1021 if (inputdev != NULL) {
1022 /* need to set a console if not done above. */
1023 console_doenv(stdin, inputdev);
1028 if (!IS_ENABLED(CONFIG_SYS_CONSOLE_INFO_QUIET))
1029 stdio_print_current_devices();
1031 #ifdef CONFIG_VIDCONSOLE_AS_LCD
1032 if (strstr(stdoutname, CONFIG_VIDCONSOLE_AS_NAME))
1033 printf("Warning: Please change '%s' to 'vidconsole' in stdout/stderr environment vars\n",
1034 CONFIG_VIDCONSOLE_AS_NAME);
1037 if (IS_ENABLED(CONFIG_SYS_CONSOLE_ENV_OVERWRITE)) {
1038 /* set the environment variables (will overwrite previous env settings) */
1039 for (i = 0; i < MAX_FILES; i++)
1040 env_set(stdio_names[i], stdio_devices[i]->name);
1043 gd->flags |= GD_FLG_DEVINIT; /* device initialization completed */
1045 print_pre_console_buffer(flushpoint);
1049 #else /* !CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
1051 /* Called after the relocation - use desired console functions */
1052 int console_init_r(void)
1054 struct stdio_dev *inputdev = NULL, *outputdev = NULL;
1056 struct list_head *list = stdio_get_list();
1057 struct list_head *pos;
1058 struct stdio_dev *dev;
1061 /* update silent for env loaded from flash (initr_env) */
1062 if (console_update_silent())
1063 flushpoint = PRE_CONSOLE_FLUSHPOINT1_SERIAL;
1065 flushpoint = PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL;
1068 * suppress all output if splash screen is enabled and we have
1069 * a bmp to display. We redirect the output from frame buffer
1070 * console to serial console in this case or suppress it if
1071 * "silent" mode was requested.
1073 if (IS_ENABLED(CONFIG_SPLASH_SCREEN) && env_get("splashimage")) {
1074 if (!(gd->flags & GD_FLG_SILENT))
1075 outputdev = console_search_dev (DEV_FLAGS_OUTPUT, "serial");
1078 /* Scan devices looking for input and output devices */
1079 list_for_each(pos, list) {
1080 dev = list_entry(pos, struct stdio_dev, list);
1082 if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) {
1085 if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) {
1088 if(inputdev && outputdev)
1092 /* Initializes output console first */
1093 if (outputdev != NULL) {
1094 console_setfile_and_devices(stdout, outputdev);
1095 console_setfile_and_devices(stderr, outputdev);
1098 /* Initializes input console */
1099 if (inputdev != NULL)
1100 console_setfile_and_devices(stdin, inputdev);
1102 if (!IS_ENABLED(CONFIG_SYS_CONSOLE_INFO_QUIET))
1103 stdio_print_current_devices();
1105 /* Setting environment variables */
1106 for (i = 0; i < MAX_FILES; i++) {
1107 env_set(stdio_names[i], stdio_devices[i]->name);
1110 gd->flags |= GD_FLG_DEVINIT; /* device initialization completed */
1112 print_pre_console_buffer(flushpoint);
1116 #endif /* CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */