3 * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
5 * SPDX-License-Identifier: GPL-2.0+
12 #include <stdio_dev.h>
14 #include <environment.h>
16 DECLARE_GLOBAL_DATA_PTR;
18 static int on_console(const char *name, const char *value, enum env_op op,
23 /* Check for console redirection */
24 if (strcmp(name, "stdin") == 0)
26 else if (strcmp(name, "stdout") == 0)
28 else if (strcmp(name, "stderr") == 0)
31 /* if not actually setting a console variable, we don't care */
32 if (console == -1 || (gd->flags & GD_FLG_DEVINIT) == 0)
37 case env_op_overwrite:
39 #ifdef CONFIG_CONSOLE_MUX
40 if (iomux_doenv(console, value))
43 /* Try assigning specified device */
44 if (console_assign(console, value) < 0)
46 #endif /* CONFIG_CONSOLE_MUX */
50 if ((flags & H_FORCE) == 0)
51 printf("Can't delete \"%s\"\n", name);
58 U_BOOT_ENV_CALLBACK(console, on_console);
60 #ifdef CONFIG_SILENT_CONSOLE
61 static int on_silent(const char *name, const char *value, enum env_op op,
64 #ifndef CONFIG_SILENT_CONSOLE_UPDATE_ON_SET
65 if (flags & H_INTERACTIVE)
68 #ifndef CONFIG_SILENT_CONSOLE_UPDATE_ON_RELOC
69 if ((flags & H_INTERACTIVE) == 0)
74 gd->flags |= GD_FLG_SILENT;
76 gd->flags &= ~GD_FLG_SILENT;
80 U_BOOT_ENV_CALLBACK(silent, on_silent);
83 #ifdef CONFIG_SYS_CONSOLE_IS_IN_ENV
85 * if overwrite_console returns 1, the stdin, stderr and stdout
86 * are switched to the serial port, else the settings in the
87 * environment are used
89 #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
90 extern int overwrite_console(void);
91 #define OVERWRITE_CONSOLE overwrite_console()
93 #define OVERWRITE_CONSOLE 0
94 #endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */
96 #endif /* CONFIG_SYS_CONSOLE_IS_IN_ENV */
98 static int console_setfile(int file, struct stdio_dev * dev)
109 /* Start new device */
111 error = dev->start();
112 /* If it's not started dont use it */
117 /* Assign the new device (leaving the existing one started) */
118 stdio_devices[file] = dev;
121 * Update monitor functions
122 * (to use the console stuff by other applications)
126 gd->jt[XF_getc] = dev->getc;
127 gd->jt[XF_tstc] = dev->tstc;
130 gd->jt[XF_putc] = dev->putc;
131 gd->jt[XF_puts] = dev->puts;
132 gd->jt[XF_printf] = printf;
137 default: /* Invalid file ID */
143 #if defined(CONFIG_CONSOLE_MUX)
144 /** Console I/O multiplexing *******************************************/
146 static struct stdio_dev *tstcdev;
147 struct stdio_dev **console_devices[MAX_FILES];
148 int cd_count[MAX_FILES];
151 * This depends on tstc() always being called before getc().
152 * This is guaranteed to be true because this routine is called
153 * only from fgetc() which assures it.
154 * No attempt is made to demultiplex multiple input sources.
156 static int console_getc(int file)
160 /* This is never called with testcdev == NULL */
161 ret = tstcdev->getc();
166 static int console_tstc(int file)
169 struct stdio_dev *dev;
172 for (i = 0; i < cd_count[file]; i++) {
173 dev = console_devices[file][i];
174 if (dev->tstc != NULL) {
188 static void console_putc(int file, const char c)
191 struct stdio_dev *dev;
193 for (i = 0; i < cd_count[file]; i++) {
194 dev = console_devices[file][i];
195 if (dev->putc != NULL)
200 static void console_puts(int file, const char *s)
203 struct stdio_dev *dev;
205 for (i = 0; i < cd_count[file]; i++) {
206 dev = console_devices[file][i];
207 if (dev->puts != NULL)
212 static inline void console_printdevs(int file)
214 iomux_printdevs(file);
217 static inline void console_doenv(int file, struct stdio_dev *dev)
219 iomux_doenv(file, dev->name);
222 static inline int console_getc(int file)
224 return stdio_devices[file]->getc();
227 static inline int console_tstc(int file)
229 return stdio_devices[file]->tstc();
232 static inline void console_putc(int file, const char c)
234 stdio_devices[file]->putc(c);
237 static inline void console_puts(int file, const char *s)
239 stdio_devices[file]->puts(s);
242 static inline void console_printdevs(int file)
244 printf("%s\n", stdio_devices[file]->name);
247 static inline void console_doenv(int file, struct stdio_dev *dev)
249 console_setfile(file, dev);
251 #endif /* defined(CONFIG_CONSOLE_MUX) */
253 /** U-Boot INITIAL CONSOLE-NOT COMPATIBLE FUNCTIONS *************************/
255 int serial_printf(const char *fmt, ...)
259 char printbuffer[CONFIG_SYS_PBSIZE];
263 /* For this to work, printbuffer must be larger than
264 * anything we ever want to print.
266 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
269 serial_puts(printbuffer);
275 if (file < MAX_FILES) {
276 #if defined(CONFIG_CONSOLE_MUX)
278 * Effectively poll for input wherever it may be available.
282 * Upper layer may have already called tstc() so
283 * check for that first.
286 return console_getc(file);
288 #ifdef CONFIG_WATCHDOG
290 * If the watchdog must be rate-limited then it should
291 * already be handled in board-specific code.
297 return console_getc(file);
306 if (file < MAX_FILES)
307 return console_tstc(file);
312 void fputc(int file, const char c)
314 if (file < MAX_FILES)
315 console_putc(file, c);
318 void fputs(int file, const char *s)
320 if (file < MAX_FILES)
321 console_puts(file, s);
324 int fprintf(int file, const char *fmt, ...)
328 char printbuffer[CONFIG_SYS_PBSIZE];
332 /* For this to work, printbuffer must be larger than
333 * anything we ever want to print.
335 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
338 /* Send to desired file */
339 fputs(file, printbuffer);
343 /** U-Boot INITIAL CONSOLE-COMPATIBLE FUNCTION *****************************/
347 #ifdef CONFIG_DISABLE_CONSOLE
348 if (gd->flags & GD_FLG_DISABLE_CONSOLE)
352 if (!gd->have_console)
355 if (gd->flags & GD_FLG_DEVINIT) {
356 /* Get from the standard input */
360 /* Send directly to the handler */
361 return serial_getc();
366 #ifdef CONFIG_DISABLE_CONSOLE
367 if (gd->flags & GD_FLG_DISABLE_CONSOLE)
371 if (!gd->have_console)
374 if (gd->flags & GD_FLG_DEVINIT) {
375 /* Test the standard input */
379 /* Send directly to the handler */
380 return serial_tstc();
383 #ifdef CONFIG_PRE_CONSOLE_BUFFER
384 #define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_PRE_CON_BUF_SZ)
386 static void pre_console_putc(const char c)
388 char *buffer = (char *)CONFIG_PRE_CON_BUF_ADDR;
390 buffer[CIRC_BUF_IDX(gd->precon_buf_idx++)] = c;
393 static void pre_console_puts(const char *s)
396 pre_console_putc(*s++);
399 static void print_pre_console_buffer(void)
402 char *buffer = (char *)CONFIG_PRE_CON_BUF_ADDR;
404 if (gd->precon_buf_idx > CONFIG_PRE_CON_BUF_SZ)
405 i = gd->precon_buf_idx - CONFIG_PRE_CON_BUF_SZ;
407 while (i < gd->precon_buf_idx)
408 putc(buffer[CIRC_BUF_IDX(i++)]);
411 static inline void pre_console_putc(const char c) {}
412 static inline void pre_console_puts(const char *s) {}
413 static inline void print_pre_console_buffer(void) {}
416 void putc(const char c)
418 #ifdef CONFIG_SILENT_CONSOLE
419 if (gd->flags & GD_FLG_SILENT)
423 #ifdef CONFIG_DISABLE_CONSOLE
424 if (gd->flags & GD_FLG_DISABLE_CONSOLE)
428 if (!gd->have_console)
429 return pre_console_putc(c);
431 if (gd->flags & GD_FLG_DEVINIT) {
432 /* Send to the standard output */
435 /* Send directly to the handler */
440 void puts(const char *s)
442 #ifdef CONFIG_SILENT_CONSOLE
443 if (gd->flags & GD_FLG_SILENT)
447 #ifdef CONFIG_DISABLE_CONSOLE
448 if (gd->flags & GD_FLG_DISABLE_CONSOLE)
452 if (!gd->have_console)
453 return pre_console_puts(s);
455 if (gd->flags & GD_FLG_DEVINIT) {
456 /* Send to the standard output */
459 /* Send directly to the handler */
464 int printf(const char *fmt, ...)
468 char printbuffer[CONFIG_SYS_PBSIZE];
470 #ifndef CONFIG_PRE_CONSOLE_BUFFER
471 if (!gd->have_console)
477 /* For this to work, printbuffer must be larger than
478 * anything we ever want to print.
480 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
483 /* Print the string */
488 int vprintf(const char *fmt, va_list args)
491 char printbuffer[CONFIG_SYS_PBSIZE];
493 #ifndef CONFIG_PRE_CONSOLE_BUFFER
494 if (!gd->have_console)
498 /* For this to work, printbuffer must be larger than
499 * anything we ever want to print.
501 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
503 /* Print the string */
508 /* test if ctrl-c was pressed */
509 static int ctrlc_disabled = 0; /* see disable_ctrl() */
510 static int ctrlc_was_pressed = 0;
513 if (!ctrlc_disabled && gd->have_console) {
516 case 0x03: /* ^C - Control C */
517 ctrlc_was_pressed = 1;
527 /* pass 1 to disable ctrlc() checking, 0 to enable.
528 * returns previous state
530 int disable_ctrlc(int disable)
532 int prev = ctrlc_disabled; /* save previous state */
534 ctrlc_disabled = disable;
540 return ctrlc_was_pressed;
543 void clear_ctrlc(void)
545 ctrlc_was_pressed = 0;
548 #ifdef CONFIG_MODEM_SUPPORT_DEBUG
550 char *cursor = screen;
552 inline void dbg(const char *fmt, ...)
556 char printbuffer[CONFIG_SYS_PBSIZE];
559 memset(screen, 0, sizeof(screen));
565 /* For this to work, printbuffer must be larger than
566 * anything we ever want to print.
568 i = vsnprintf(printbuffer, sizeof(printbuffer), fmt, args);
571 if ((screen + sizeof(screen) - 1 - cursor)
572 < strlen(printbuffer) + 1) {
573 memset(screen, 0, sizeof(screen));
576 sprintf(cursor, printbuffer);
577 cursor += strlen(printbuffer);
581 inline void dbg(const char *fmt, ...)
586 /** U-Boot INIT FUNCTIONS *************************************************/
588 struct stdio_dev *search_device(int flags, const char *name)
590 struct stdio_dev *dev;
592 dev = stdio_get_by_name(name);
594 if (dev && (dev->flags & flags))
600 int console_assign(int file, const char *devname)
603 struct stdio_dev *dev;
605 /* Check for valid file */
608 flag = DEV_FLAGS_INPUT;
612 flag = DEV_FLAGS_OUTPUT;
618 /* Check for valid device name */
620 dev = search_device(flag, devname);
623 return console_setfile(file, dev);
628 /* Called before relocation - use serial functions */
629 int console_init_f(void)
631 gd->have_console = 1;
633 #ifdef CONFIG_SILENT_CONSOLE
634 if (getenv("silent") != NULL)
635 gd->flags |= GD_FLG_SILENT;
638 print_pre_console_buffer();
643 void stdio_print_current_devices(void)
645 /* Print information */
647 if (stdio_devices[stdin] == NULL) {
648 puts("No input devices available!\n");
650 printf ("%s\n", stdio_devices[stdin]->name);
654 if (stdio_devices[stdout] == NULL) {
655 puts("No output devices available!\n");
657 printf ("%s\n", stdio_devices[stdout]->name);
661 if (stdio_devices[stderr] == NULL) {
662 puts("No error devices available!\n");
664 printf ("%s\n", stdio_devices[stderr]->name);
668 #ifdef CONFIG_SYS_CONSOLE_IS_IN_ENV
669 /* Called after the relocation - use desired console functions */
670 int console_init_r(void)
672 char *stdinname, *stdoutname, *stderrname;
673 struct stdio_dev *inputdev = NULL, *outputdev = NULL, *errdev = NULL;
674 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
676 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
677 #ifdef CONFIG_CONSOLE_MUX
681 /* set default handlers at first */
682 gd->jt[XF_getc] = serial_getc;
683 gd->jt[XF_tstc] = serial_tstc;
684 gd->jt[XF_putc] = serial_putc;
685 gd->jt[XF_puts] = serial_puts;
686 gd->jt[XF_printf] = serial_printf;
688 /* stdin stdout and stderr are in environment */
690 stdinname = getenv("stdin");
691 stdoutname = getenv("stdout");
692 stderrname = getenv("stderr");
694 if (OVERWRITE_CONSOLE == 0) { /* if not overwritten by config switch */
695 inputdev = search_device(DEV_FLAGS_INPUT, stdinname);
696 outputdev = search_device(DEV_FLAGS_OUTPUT, stdoutname);
697 errdev = search_device(DEV_FLAGS_OUTPUT, stderrname);
698 #ifdef CONFIG_CONSOLE_MUX
699 iomux_err = iomux_doenv(stdin, stdinname);
700 iomux_err += iomux_doenv(stdout, stdoutname);
701 iomux_err += iomux_doenv(stderr, stderrname);
703 /* Successful, so skip all the code below. */
707 /* if the devices are overwritten or not found, use default device */
708 if (inputdev == NULL) {
709 inputdev = search_device(DEV_FLAGS_INPUT, "serial");
711 if (outputdev == NULL) {
712 outputdev = search_device(DEV_FLAGS_OUTPUT, "serial");
714 if (errdev == NULL) {
715 errdev = search_device(DEV_FLAGS_OUTPUT, "serial");
717 /* Initializes output console first */
718 if (outputdev != NULL) {
719 /* need to set a console if not done above. */
720 console_doenv(stdout, outputdev);
722 if (errdev != NULL) {
723 /* need to set a console if not done above. */
724 console_doenv(stderr, errdev);
726 if (inputdev != NULL) {
727 /* need to set a console if not done above. */
728 console_doenv(stdin, inputdev);
731 #ifdef CONFIG_CONSOLE_MUX
735 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
736 stdio_print_current_devices();
737 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
739 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
740 /* set the environment variables (will overwrite previous env settings) */
741 for (i = 0; i < 3; i++) {
742 setenv(stdio_names[i], stdio_devices[i]->name);
744 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
746 gd->flags |= GD_FLG_DEVINIT; /* device initialization completed */
749 /* If nothing usable installed, use only the initial console */
750 if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
756 #else /* CONFIG_SYS_CONSOLE_IS_IN_ENV */
758 /* Called after the relocation - use desired console functions */
759 int console_init_r(void)
761 struct stdio_dev *inputdev = NULL, *outputdev = NULL;
763 struct list_head *list = stdio_get_list();
764 struct list_head *pos;
765 struct stdio_dev *dev;
767 #ifdef CONFIG_SPLASH_SCREEN
769 * suppress all output if splash screen is enabled and we have
770 * a bmp to display. We redirect the output from frame buffer
771 * console to serial console in this case or suppress it if
772 * "silent" mode was requested.
774 if (getenv("splashimage") != NULL) {
775 if (!(gd->flags & GD_FLG_SILENT))
776 outputdev = search_device (DEV_FLAGS_OUTPUT, "serial");
780 /* Scan devices looking for input and output devices */
781 list_for_each(pos, list) {
782 dev = list_entry(pos, struct stdio_dev, list);
784 if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) {
787 if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) {
790 if(inputdev && outputdev)
794 /* Initializes output console first */
795 if (outputdev != NULL) {
796 console_setfile(stdout, outputdev);
797 console_setfile(stderr, outputdev);
798 #ifdef CONFIG_CONSOLE_MUX
799 console_devices[stdout][0] = outputdev;
800 console_devices[stderr][0] = outputdev;
804 /* Initializes input console */
805 if (inputdev != NULL) {
806 console_setfile(stdin, inputdev);
807 #ifdef CONFIG_CONSOLE_MUX
808 console_devices[stdin][0] = inputdev;
812 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
813 stdio_print_current_devices();
814 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
816 /* Setting environment variables */
817 for (i = 0; i < 3; i++) {
818 setenv(stdio_names[i], stdio_devices[i]->name);
821 gd->flags |= GD_FLG_DEVINIT; /* device initialization completed */
824 /* If nothing usable installed, use only the initial console */
825 if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
832 #endif /* CONFIG_SYS_CONSOLE_IS_IN_ENV */