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>
17 #include <stdio_dev.h>
19 #include <environment.h>
22 DECLARE_GLOBAL_DATA_PTR;
24 static int on_console(const char *name, const char *value, enum env_op op,
29 /* Check for console redirection */
30 if (strcmp(name, "stdin") == 0)
32 else if (strcmp(name, "stdout") == 0)
34 else if (strcmp(name, "stderr") == 0)
37 /* if not actually setting a console variable, we don't care */
38 if (console == -1 || (gd->flags & GD_FLG_DEVINIT) == 0)
43 case env_op_overwrite:
45 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
46 if (iomux_doenv(console, value))
49 /* Try assigning specified device */
50 if (console_assign(console, value) < 0)
56 if ((flags & H_FORCE) == 0)
57 printf("Can't delete \"%s\"\n", name);
64 U_BOOT_ENV_CALLBACK(console, on_console);
66 #ifdef CONFIG_SILENT_CONSOLE
67 static int on_silent(const char *name, const char *value, enum env_op op,
70 #if !CONFIG_IS_ENABLED(SILENT_CONSOLE_UPDATE_ON_SET)
71 if (flags & H_INTERACTIVE)
74 #if !CONFIG_IS_ENABLED(SILENT_CONSOLE_UPDATE_ON_RELOC)
75 if ((flags & H_INTERACTIVE) == 0)
80 gd->flags |= GD_FLG_SILENT;
82 gd->flags &= ~GD_FLG_SILENT;
86 U_BOOT_ENV_CALLBACK(silent, on_silent);
89 #if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
91 * if overwrite_console returns 1, the stdin, stderr and stdout
92 * are switched to the serial port, else the settings in the
93 * environment are used
95 #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
96 extern int overwrite_console(void);
97 #define OVERWRITE_CONSOLE overwrite_console()
99 #define OVERWRITE_CONSOLE 0
100 #endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */
102 #endif /* CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
104 static int console_setfile(int file, struct stdio_dev * dev)
115 /* Start new device */
117 error = dev->start(dev);
118 /* If it's not started dont use it */
123 /* Assign the new device (leaving the existing one started) */
124 stdio_devices[file] = dev;
127 * Update monitor functions
128 * (to use the console stuff by other applications)
138 gd->jt->printf = printf;
143 default: /* Invalid file ID */
150 * console_dev_is_serial() - Check if a stdio device is a serial device
152 * @sdev: Device to check
153 * @return true if this device is in the serial uclass (or for pre-driver-model,
154 * whether it is called "serial".
156 static bool console_dev_is_serial(struct stdio_dev *sdev)
160 #ifdef CONFIG_DM_SERIAL
161 if (sdev->flags & DEV_FLAGS_DM) {
162 struct udevice *dev = sdev->priv;
164 is_serial = device_get_uclass_id(dev) == UCLASS_SERIAL;
167 is_serial = !strcmp(sdev->name, "serial");
172 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
173 /** Console I/O multiplexing *******************************************/
175 static struct stdio_dev *tstcdev;
176 struct stdio_dev **console_devices[MAX_FILES];
177 int cd_count[MAX_FILES];
180 * This depends on tstc() always being called before getc().
181 * This is guaranteed to be true because this routine is called
182 * only from fgetc() which assures it.
183 * No attempt is made to demultiplex multiple input sources.
185 static int console_getc(int file)
189 /* This is never called with testcdev == NULL */
190 ret = tstcdev->getc(tstcdev);
195 static int console_tstc(int file)
198 struct stdio_dev *dev;
201 prev = disable_ctrlc(1);
202 for (i = 0; i < cd_count[file]; i++) {
203 dev = console_devices[file][i];
204 if (dev->tstc != NULL) {
205 ret = dev->tstc(dev);
218 static void console_putc(int file, const char c)
221 struct stdio_dev *dev;
223 for (i = 0; i < cd_count[file]; i++) {
224 dev = console_devices[file][i];
225 if (dev->putc != NULL)
230 static void console_puts_noserial(int file, const char *s)
233 struct stdio_dev *dev;
235 for (i = 0; i < cd_count[file]; i++) {
236 dev = console_devices[file][i];
237 if (dev->puts != NULL && !console_dev_is_serial(dev))
242 static void console_puts(int file, const char *s)
245 struct stdio_dev *dev;
247 for (i = 0; i < cd_count[file]; i++) {
248 dev = console_devices[file][i];
249 if (dev->puts != NULL)
254 static inline void console_doenv(int file, struct stdio_dev *dev)
256 iomux_doenv(file, dev->name);
259 static inline int console_getc(int file)
261 return stdio_devices[file]->getc(stdio_devices[file]);
264 static inline int console_tstc(int file)
266 return stdio_devices[file]->tstc(stdio_devices[file]);
269 static inline void console_putc(int file, const char c)
271 stdio_devices[file]->putc(stdio_devices[file], c);
274 static inline void console_puts_noserial(int file, const char *s)
276 if (!console_dev_is_serial(stdio_devices[file]))
277 stdio_devices[file]->puts(stdio_devices[file], s);
280 static inline void console_puts(int file, const char *s)
282 stdio_devices[file]->puts(stdio_devices[file], s);
285 static inline void console_doenv(int file, struct stdio_dev *dev)
287 console_setfile(file, dev);
289 #endif /* CONIFIG_IS_ENABLED(CONSOLE_MUX) */
291 /** U-Boot INITIAL CONSOLE-NOT COMPATIBLE FUNCTIONS *************************/
293 int serial_printf(const char *fmt, ...)
297 char printbuffer[CONFIG_SYS_PBSIZE];
301 /* For this to work, printbuffer must be larger than
302 * anything we ever want to print.
304 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
307 serial_puts(printbuffer);
313 if (file < MAX_FILES) {
315 * Effectively poll for input wherever it may be available.
319 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
321 * Upper layer may have already called tstc() so
322 * check for that first.
325 return console_getc(file);
328 if (console_tstc(file))
329 return console_getc(file);
331 #ifdef CONFIG_WATCHDOG
333 * If the watchdog must be rate-limited then it should
334 * already be handled in board-specific code.
346 if (file < MAX_FILES)
347 return console_tstc(file);
352 void fputc(int file, const char c)
354 if (file < MAX_FILES)
355 console_putc(file, c);
358 void fputs(int file, const char *s)
360 if (file < MAX_FILES)
361 console_puts(file, s);
364 int fprintf(int file, const char *fmt, ...)
368 char printbuffer[CONFIG_SYS_PBSIZE];
372 /* For this to work, printbuffer must be larger than
373 * anything we ever want to print.
375 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
378 /* Send to desired file */
379 fputs(file, printbuffer);
383 /** U-Boot INITIAL CONSOLE-COMPATIBLE FUNCTION *****************************/
387 #ifdef CONFIG_DISABLE_CONSOLE
388 if (gd->flags & GD_FLG_DISABLE_CONSOLE)
392 if (!gd->have_console)
395 #ifdef CONFIG_CONSOLE_RECORD
396 if (gd->console_in.start) {
399 ch = membuff_getbyte(&gd->console_in);
404 if (gd->flags & GD_FLG_DEVINIT) {
405 /* Get from the standard input */
409 /* Send directly to the handler */
410 return serial_getc();
415 #ifdef CONFIG_DISABLE_CONSOLE
416 if (gd->flags & GD_FLG_DISABLE_CONSOLE)
420 if (!gd->have_console)
422 #ifdef CONFIG_CONSOLE_RECORD
423 if (gd->console_in.start) {
424 if (membuff_peekbyte(&gd->console_in) != -1)
428 if (gd->flags & GD_FLG_DEVINIT) {
429 /* Test the standard input */
433 /* Send directly to the handler */
434 return serial_tstc();
437 #define PRE_CONSOLE_FLUSHPOINT1_SERIAL 0
438 #define PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL 1
440 #if CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
441 #define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_PRE_CON_BUF_SZ)
443 static void pre_console_putc(const char c)
447 buffer = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
449 buffer[CIRC_BUF_IDX(gd->precon_buf_idx++)] = c;
451 unmap_sysmem(buffer);
454 static void pre_console_puts(const char *s)
457 pre_console_putc(*s++);
460 static void print_pre_console_buffer(int flushpoint)
462 unsigned long in = 0, out = 0;
463 char buf_out[CONFIG_PRE_CON_BUF_SZ + 1];
466 buf_in = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
467 if (gd->precon_buf_idx > CONFIG_PRE_CON_BUF_SZ)
468 in = gd->precon_buf_idx - CONFIG_PRE_CON_BUF_SZ;
470 while (in < gd->precon_buf_idx)
471 buf_out[out++] = buf_in[CIRC_BUF_IDX(in++)];
472 unmap_sysmem(buf_in);
476 switch (flushpoint) {
477 case PRE_CONSOLE_FLUSHPOINT1_SERIAL:
480 case PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL:
481 console_puts_noserial(stdout, buf_out);
486 static inline void pre_console_putc(const char c) {}
487 static inline void pre_console_puts(const char *s) {}
488 static inline void print_pre_console_buffer(int flushpoint) {}
491 void putc(const char c)
493 #ifdef CONFIG_SANDBOX
494 /* sandbox can send characters to stdout before it has a console */
495 if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
500 #ifdef CONFIG_DEBUG_UART
501 /* if we don't have a console yet, use the debug UART */
502 if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
509 #ifdef CONFIG_CONSOLE_RECORD
510 if ((gd->flags & GD_FLG_RECORD) && gd->console_out.start)
511 membuff_putbyte(&gd->console_out, c);
513 #ifdef CONFIG_SILENT_CONSOLE
514 if (gd->flags & GD_FLG_SILENT)
518 #ifdef CONFIG_DISABLE_CONSOLE
519 if (gd->flags & GD_FLG_DISABLE_CONSOLE)
523 if (!gd->have_console)
524 return pre_console_putc(c);
526 if (gd->flags & GD_FLG_DEVINIT) {
527 /* Send to the standard output */
530 /* Send directly to the handler */
536 void puts(const char *s)
538 #ifdef CONFIG_DEBUG_UART
539 if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
550 #ifdef CONFIG_CONSOLE_RECORD
551 if ((gd->flags & GD_FLG_RECORD) && gd->console_out.start)
552 membuff_put(&gd->console_out, s, strlen(s));
554 #ifdef CONFIG_SILENT_CONSOLE
555 if (gd->flags & GD_FLG_SILENT)
559 #ifdef CONFIG_DISABLE_CONSOLE
560 if (gd->flags & GD_FLG_DISABLE_CONSOLE)
564 if (!gd->have_console)
565 return pre_console_puts(s);
567 if (gd->flags & GD_FLG_DEVINIT) {
568 /* Send to the standard output */
571 /* Send directly to the handler */
577 #ifdef CONFIG_CONSOLE_RECORD
578 int console_record_init(void)
582 ret = membuff_new(&gd->console_out, CONFIG_CONSOLE_RECORD_OUT_SIZE);
585 ret = membuff_new(&gd->console_in, CONFIG_CONSOLE_RECORD_IN_SIZE);
590 void console_record_reset(void)
592 membuff_purge(&gd->console_out);
593 membuff_purge(&gd->console_in);
596 void console_record_reset_enable(void)
598 console_record_reset();
599 gd->flags |= GD_FLG_RECORD;
603 /* test if ctrl-c was pressed */
604 static int ctrlc_disabled = 0; /* see disable_ctrl() */
605 static int ctrlc_was_pressed = 0;
608 if (!ctrlc_disabled && gd->have_console) {
611 case 0x03: /* ^C - Control C */
612 ctrlc_was_pressed = 1;
622 /* Reads user's confirmation.
623 Returns 1 if user's input is "y", "Y", "yes" or "YES"
625 int confirm_yesno(void)
634 while (i < sizeof(str_input)) {
635 str_input[i] = getc();
637 if (str_input[i] == '\r')
642 if (strncmp(str_input, "y\r", 2) == 0 ||
643 strncmp(str_input, "Y\r", 2) == 0 ||
644 strncmp(str_input, "yes\r", 4) == 0 ||
645 strncmp(str_input, "YES\r", 4) == 0)
649 /* pass 1 to disable ctrlc() checking, 0 to enable.
650 * returns previous state
652 int disable_ctrlc(int disable)
654 int prev = ctrlc_disabled; /* save previous state */
656 ctrlc_disabled = disable;
662 return ctrlc_was_pressed;
665 void clear_ctrlc(void)
667 ctrlc_was_pressed = 0;
670 /** U-Boot INIT FUNCTIONS *************************************************/
672 struct stdio_dev *search_device(int flags, const char *name)
674 struct stdio_dev *dev;
676 dev = stdio_get_by_name(name);
677 #ifdef CONFIG_VIDCONSOLE_AS_LCD
678 if (!dev && !strcmp(name, "lcd"))
679 dev = stdio_get_by_name("vidconsole");
682 if (dev && (dev->flags & flags))
688 int console_assign(int file, const char *devname)
691 struct stdio_dev *dev;
693 /* Check for valid file */
696 flag = DEV_FLAGS_INPUT;
700 flag = DEV_FLAGS_OUTPUT;
706 /* Check for valid device name */
708 dev = search_device(flag, devname);
711 return console_setfile(file, dev);
716 static void console_update_silent(void)
718 #ifdef CONFIG_SILENT_CONSOLE
719 if (env_get("silent") != NULL)
720 gd->flags |= GD_FLG_SILENT;
722 gd->flags &= ~GD_FLG_SILENT;
726 int console_announce_r(void)
728 #if !CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
729 char buf[DISPLAY_OPTIONS_BANNER_LENGTH];
731 display_options_get_banner(false, buf, sizeof(buf));
733 console_puts_noserial(stdout, buf);
739 /* Called before relocation - use serial functions */
740 int console_init_f(void)
742 gd->have_console = 1;
744 console_update_silent();
746 print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT1_SERIAL);
751 void stdio_print_current_devices(void)
753 /* Print information */
755 if (stdio_devices[stdin] == NULL) {
756 puts("No input devices available!\n");
758 printf ("%s\n", stdio_devices[stdin]->name);
762 if (stdio_devices[stdout] == NULL) {
763 puts("No output devices available!\n");
765 printf ("%s\n", stdio_devices[stdout]->name);
769 if (stdio_devices[stderr] == NULL) {
770 puts("No error devices available!\n");
772 printf ("%s\n", stdio_devices[stderr]->name);
776 #if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
777 /* Called after the relocation - use desired console functions */
778 int console_init_r(void)
780 char *stdinname, *stdoutname, *stderrname;
781 struct stdio_dev *inputdev = NULL, *outputdev = NULL, *errdev = NULL;
782 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
784 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
785 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
789 /* set default handlers at first */
790 gd->jt->getc = serial_getc;
791 gd->jt->tstc = serial_tstc;
792 gd->jt->putc = serial_putc;
793 gd->jt->puts = serial_puts;
794 gd->jt->printf = serial_printf;
796 /* stdin stdout and stderr are in environment */
798 stdinname = env_get("stdin");
799 stdoutname = env_get("stdout");
800 stderrname = env_get("stderr");
802 if (OVERWRITE_CONSOLE == 0) { /* if not overwritten by config switch */
803 inputdev = search_device(DEV_FLAGS_INPUT, stdinname);
804 outputdev = search_device(DEV_FLAGS_OUTPUT, stdoutname);
805 errdev = search_device(DEV_FLAGS_OUTPUT, stderrname);
806 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
807 iomux_err = iomux_doenv(stdin, stdinname);
808 iomux_err += iomux_doenv(stdout, stdoutname);
809 iomux_err += iomux_doenv(stderr, stderrname);
811 /* Successful, so skip all the code below. */
815 /* if the devices are overwritten or not found, use default device */
816 if (inputdev == NULL) {
817 inputdev = search_device(DEV_FLAGS_INPUT, "serial");
819 if (outputdev == NULL) {
820 outputdev = search_device(DEV_FLAGS_OUTPUT, "serial");
822 if (errdev == NULL) {
823 errdev = search_device(DEV_FLAGS_OUTPUT, "serial");
825 /* Initializes output console first */
826 if (outputdev != NULL) {
827 /* need to set a console if not done above. */
828 console_doenv(stdout, outputdev);
830 if (errdev != NULL) {
831 /* need to set a console if not done above. */
832 console_doenv(stderr, errdev);
834 if (inputdev != NULL) {
835 /* need to set a console if not done above. */
836 console_doenv(stdin, inputdev);
839 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
843 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
844 stdio_print_current_devices();
845 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
846 #ifdef CONFIG_VIDCONSOLE_AS_LCD
847 if (strstr(stdoutname, "lcd"))
848 printf("Warning: Please change 'lcd' to 'vidconsole' in stdout/stderr environment vars\n");
851 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
852 /* set the environment variables (will overwrite previous env settings) */
853 for (i = 0; i < MAX_FILES; i++) {
854 env_set(stdio_names[i], stdio_devices[i]->name);
856 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
858 gd->flags |= GD_FLG_DEVINIT; /* device initialization completed */
861 /* If nothing usable installed, use only the initial console */
862 if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
865 print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL);
869 #else /* !CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
871 /* Called after the relocation - use desired console functions */
872 int console_init_r(void)
874 struct stdio_dev *inputdev = NULL, *outputdev = NULL;
876 struct list_head *list = stdio_get_list();
877 struct list_head *pos;
878 struct stdio_dev *dev;
880 console_update_silent();
882 #ifdef CONFIG_SPLASH_SCREEN
884 * suppress all output if splash screen is enabled and we have
885 * a bmp to display. We redirect the output from frame buffer
886 * console to serial console in this case or suppress it if
887 * "silent" mode was requested.
889 if (env_get("splashimage") != NULL) {
890 if (!(gd->flags & GD_FLG_SILENT))
891 outputdev = search_device (DEV_FLAGS_OUTPUT, "serial");
895 /* Scan devices looking for input and output devices */
896 list_for_each(pos, list) {
897 dev = list_entry(pos, struct stdio_dev, list);
899 if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) {
902 if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) {
905 if(inputdev && outputdev)
909 /* Initializes output console first */
910 if (outputdev != NULL) {
911 console_setfile(stdout, outputdev);
912 console_setfile(stderr, outputdev);
913 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
914 console_devices[stdout][0] = outputdev;
915 console_devices[stderr][0] = outputdev;
919 /* Initializes input console */
920 if (inputdev != NULL) {
921 console_setfile(stdin, inputdev);
922 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
923 console_devices[stdin][0] = inputdev;
927 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
928 stdio_print_current_devices();
929 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
931 /* Setting environment variables */
932 for (i = 0; i < MAX_FILES; i++) {
933 env_set(stdio_names[i], stdio_devices[i]->name);
936 gd->flags |= GD_FLG_DEVINIT; /* device initialization completed */
939 /* If nothing usable installed, use only the initial console */
940 if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
943 print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL);
947 #endif /* CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */