3 * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
28 #include <stdio_dev.h>
30 #include <environment.h>
32 DECLARE_GLOBAL_DATA_PTR;
34 static int on_console(const char *name, const char *value, enum env_op op,
39 /* Check for console redirection */
40 if (strcmp(name, "stdin") == 0)
42 else if (strcmp(name, "stdout") == 0)
44 else if (strcmp(name, "stderr") == 0)
47 /* if not actually setting a console variable, we don't care */
48 if (console == -1 || (gd->flags & GD_FLG_DEVINIT) == 0)
53 case env_op_overwrite:
55 #ifdef CONFIG_CONSOLE_MUX
56 if (iomux_doenv(console, value))
59 /* Try assigning specified device */
60 if (console_assign(console, value) < 0)
62 #endif /* CONFIG_CONSOLE_MUX */
66 if ((flags & H_FORCE) == 0)
67 printf("Can't delete \"%s\"\n", name);
74 U_BOOT_ENV_CALLBACK(console, on_console);
76 #ifdef CONFIG_SILENT_CONSOLE
77 static int on_silent(const char *name, const char *value, enum env_op op,
80 #ifndef CONFIG_SILENT_CONSOLE_UPDATE_ON_SET
81 if (flags & H_INTERACTIVE)
84 #ifndef CONFIG_SILENT_CONSOLE_UPDATE_ON_RELOC
85 if ((flags & H_INTERACTIVE) == 0)
90 gd->flags |= GD_FLG_SILENT;
92 gd->flags &= ~GD_FLG_SILENT;
96 U_BOOT_ENV_CALLBACK(silent, on_silent);
99 #ifdef CONFIG_SYS_CONSOLE_IS_IN_ENV
101 * if overwrite_console returns 1, the stdin, stderr and stdout
102 * are switched to the serial port, else the settings in the
103 * environment are used
105 #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
106 extern int overwrite_console(void);
107 #define OVERWRITE_CONSOLE overwrite_console()
109 #define OVERWRITE_CONSOLE 0
110 #endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */
112 #endif /* CONFIG_SYS_CONSOLE_IS_IN_ENV */
114 static int console_setfile(int file, struct stdio_dev * dev)
125 /* Start new device */
127 error = dev->start();
128 /* If it's not started dont use it */
133 /* Assign the new device (leaving the existing one started) */
134 stdio_devices[file] = dev;
137 * Update monitor functions
138 * (to use the console stuff by other applications)
142 gd->jt[XF_getc] = dev->getc;
143 gd->jt[XF_tstc] = dev->tstc;
146 gd->jt[XF_putc] = dev->putc;
147 gd->jt[XF_puts] = dev->puts;
148 gd->jt[XF_printf] = printf;
153 default: /* Invalid file ID */
159 #if defined(CONFIG_CONSOLE_MUX)
160 /** Console I/O multiplexing *******************************************/
162 static struct stdio_dev *tstcdev;
163 struct stdio_dev **console_devices[MAX_FILES];
164 int cd_count[MAX_FILES];
167 * This depends on tstc() always being called before getc().
168 * This is guaranteed to be true because this routine is called
169 * only from fgetc() which assures it.
170 * No attempt is made to demultiplex multiple input sources.
172 static int console_getc(int file)
176 /* This is never called with testcdev == NULL */
177 ret = tstcdev->getc();
182 static int console_tstc(int file)
185 struct stdio_dev *dev;
188 for (i = 0; i < cd_count[file]; i++) {
189 dev = console_devices[file][i];
190 if (dev->tstc != NULL) {
204 static void console_putc(int file, const char c)
207 struct stdio_dev *dev;
209 for (i = 0; i < cd_count[file]; i++) {
210 dev = console_devices[file][i];
211 if (dev->putc != NULL)
216 static void console_puts(int file, const char *s)
219 struct stdio_dev *dev;
221 for (i = 0; i < cd_count[file]; i++) {
222 dev = console_devices[file][i];
223 if (dev->puts != NULL)
228 static inline void console_printdevs(int file)
230 iomux_printdevs(file);
233 static inline void console_doenv(int file, struct stdio_dev *dev)
235 iomux_doenv(file, dev->name);
238 static inline int console_getc(int file)
240 return stdio_devices[file]->getc();
243 static inline int console_tstc(int file)
245 return stdio_devices[file]->tstc();
248 static inline void console_putc(int file, const char c)
250 stdio_devices[file]->putc(c);
253 static inline void console_puts(int file, const char *s)
255 stdio_devices[file]->puts(s);
258 static inline void console_printdevs(int file)
260 printf("%s\n", stdio_devices[file]->name);
263 static inline void console_doenv(int file, struct stdio_dev *dev)
265 console_setfile(file, dev);
267 #endif /* defined(CONFIG_CONSOLE_MUX) */
269 /** U-Boot INITIAL CONSOLE-NOT COMPATIBLE FUNCTIONS *************************/
271 int serial_printf(const char *fmt, ...)
275 char printbuffer[CONFIG_SYS_PBSIZE];
279 /* For this to work, printbuffer must be larger than
280 * anything we ever want to print.
282 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
285 serial_puts(printbuffer);
291 if (file < MAX_FILES) {
292 #if defined(CONFIG_CONSOLE_MUX)
294 * Effectively poll for input wherever it may be available.
298 * Upper layer may have already called tstc() so
299 * check for that first.
302 return console_getc(file);
304 #ifdef CONFIG_WATCHDOG
306 * If the watchdog must be rate-limited then it should
307 * already be handled in board-specific code.
313 return console_getc(file);
322 if (file < MAX_FILES)
323 return console_tstc(file);
328 void fputc(int file, const char c)
330 if (file < MAX_FILES)
331 console_putc(file, c);
334 void fputs(int file, const char *s)
336 if (file < MAX_FILES)
337 console_puts(file, s);
340 int fprintf(int file, const char *fmt, ...)
344 char printbuffer[CONFIG_SYS_PBSIZE];
348 /* For this to work, printbuffer must be larger than
349 * anything we ever want to print.
351 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
354 /* Send to desired file */
355 fputs(file, printbuffer);
359 /** U-Boot INITIAL CONSOLE-COMPATIBLE FUNCTION *****************************/
363 #ifdef CONFIG_DISABLE_CONSOLE
364 if (gd->flags & GD_FLG_DISABLE_CONSOLE)
368 if (!gd->have_console)
371 if (gd->flags & GD_FLG_DEVINIT) {
372 /* Get from the standard input */
376 /* Send directly to the handler */
377 return serial_getc();
382 #ifdef CONFIG_DISABLE_CONSOLE
383 if (gd->flags & GD_FLG_DISABLE_CONSOLE)
387 if (!gd->have_console)
390 if (gd->flags & GD_FLG_DEVINIT) {
391 /* Test the standard input */
395 /* Send directly to the handler */
396 return serial_tstc();
399 #ifdef CONFIG_PRE_CONSOLE_BUFFER
400 #define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_PRE_CON_BUF_SZ)
402 static void pre_console_putc(const char c)
404 char *buffer = (char *)CONFIG_PRE_CON_BUF_ADDR;
406 buffer[CIRC_BUF_IDX(gd->precon_buf_idx++)] = c;
409 static void pre_console_puts(const char *s)
412 pre_console_putc(*s++);
415 static void print_pre_console_buffer(void)
418 char *buffer = (char *)CONFIG_PRE_CON_BUF_ADDR;
420 if (gd->precon_buf_idx > CONFIG_PRE_CON_BUF_SZ)
421 i = gd->precon_buf_idx - CONFIG_PRE_CON_BUF_SZ;
423 while (i < gd->precon_buf_idx)
424 putc(buffer[CIRC_BUF_IDX(i++)]);
427 static inline void pre_console_putc(const char c) {}
428 static inline void pre_console_puts(const char *s) {}
429 static inline void print_pre_console_buffer(void) {}
432 void putc(const char c)
434 #ifdef CONFIG_SILENT_CONSOLE
435 if (gd->flags & GD_FLG_SILENT)
439 #ifdef CONFIG_DISABLE_CONSOLE
440 if (gd->flags & GD_FLG_DISABLE_CONSOLE)
444 if (!gd->have_console)
445 return pre_console_putc(c);
447 if (gd->flags & GD_FLG_DEVINIT) {
448 /* Send to the standard output */
451 /* Send directly to the handler */
456 void puts(const char *s)
458 #ifdef CONFIG_SILENT_CONSOLE
459 if (gd->flags & GD_FLG_SILENT)
463 #ifdef CONFIG_DISABLE_CONSOLE
464 if (gd->flags & GD_FLG_DISABLE_CONSOLE)
468 if (!gd->have_console)
469 return pre_console_puts(s);
471 if (gd->flags & GD_FLG_DEVINIT) {
472 /* Send to the standard output */
475 /* Send directly to the handler */
480 int printf(const char *fmt, ...)
484 char printbuffer[CONFIG_SYS_PBSIZE];
486 #ifndef CONFIG_PRE_CONSOLE_BUFFER
487 if (!gd->have_console)
493 /* For this to work, printbuffer must be larger than
494 * anything we ever want to print.
496 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
499 /* Print the string */
504 int vprintf(const char *fmt, va_list args)
507 char printbuffer[CONFIG_SYS_PBSIZE];
509 #ifndef CONFIG_PRE_CONSOLE_BUFFER
510 if (!gd->have_console)
514 /* For this to work, printbuffer must be larger than
515 * anything we ever want to print.
517 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
519 /* Print the string */
524 /* test if ctrl-c was pressed */
525 static int ctrlc_disabled = 0; /* see disable_ctrl() */
526 static int ctrlc_was_pressed = 0;
529 if (!ctrlc_disabled && gd->have_console) {
532 case 0x03: /* ^C - Control C */
533 ctrlc_was_pressed = 1;
543 /* pass 1 to disable ctrlc() checking, 0 to enable.
544 * returns previous state
546 int disable_ctrlc(int disable)
548 int prev = ctrlc_disabled; /* save previous state */
550 ctrlc_disabled = disable;
556 return ctrlc_was_pressed;
559 void clear_ctrlc(void)
561 ctrlc_was_pressed = 0;
564 #ifdef CONFIG_MODEM_SUPPORT_DEBUG
566 char *cursor = screen;
568 inline void dbg(const char *fmt, ...)
572 char printbuffer[CONFIG_SYS_PBSIZE];
575 memset(screen, 0, sizeof(screen));
581 /* For this to work, printbuffer must be larger than
582 * anything we ever want to print.
584 i = vsnprintf(printbuffer, sizeof(printbuffer), fmt, args);
587 if ((screen + sizeof(screen) - 1 - cursor)
588 < strlen(printbuffer) + 1) {
589 memset(screen, 0, sizeof(screen));
592 sprintf(cursor, printbuffer);
593 cursor += strlen(printbuffer);
597 inline void dbg(const char *fmt, ...)
602 /** U-Boot INIT FUNCTIONS *************************************************/
604 struct stdio_dev *search_device(int flags, const char *name)
606 struct stdio_dev *dev;
608 dev = stdio_get_by_name(name);
610 if (dev && (dev->flags & flags))
616 int console_assign(int file, const char *devname)
619 struct stdio_dev *dev;
621 /* Check for valid file */
624 flag = DEV_FLAGS_INPUT;
628 flag = DEV_FLAGS_OUTPUT;
634 /* Check for valid device name */
636 dev = search_device(flag, devname);
639 return console_setfile(file, dev);
644 /* Called before relocation - use serial functions */
645 int console_init_f(void)
647 gd->have_console = 1;
649 #ifdef CONFIG_SILENT_CONSOLE
650 if (getenv("silent") != NULL)
651 gd->flags |= GD_FLG_SILENT;
654 print_pre_console_buffer();
659 void stdio_print_current_devices(void)
661 /* Print information */
663 if (stdio_devices[stdin] == NULL) {
664 puts("No input devices available!\n");
666 printf ("%s\n", stdio_devices[stdin]->name);
670 if (stdio_devices[stdout] == NULL) {
671 puts("No output devices available!\n");
673 printf ("%s\n", stdio_devices[stdout]->name);
677 if (stdio_devices[stderr] == NULL) {
678 puts("No error devices available!\n");
680 printf ("%s\n", stdio_devices[stderr]->name);
684 #ifdef CONFIG_SYS_CONSOLE_IS_IN_ENV
685 /* Called after the relocation - use desired console functions */
686 int console_init_r(void)
688 char *stdinname, *stdoutname, *stderrname;
689 struct stdio_dev *inputdev = NULL, *outputdev = NULL, *errdev = NULL;
690 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
692 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
693 #ifdef CONFIG_CONSOLE_MUX
697 /* set default handlers at first */
698 gd->jt[XF_getc] = serial_getc;
699 gd->jt[XF_tstc] = serial_tstc;
700 gd->jt[XF_putc] = serial_putc;
701 gd->jt[XF_puts] = serial_puts;
702 gd->jt[XF_printf] = serial_printf;
704 /* stdin stdout and stderr are in environment */
706 stdinname = getenv("stdin");
707 stdoutname = getenv("stdout");
708 stderrname = getenv("stderr");
710 if (OVERWRITE_CONSOLE == 0) { /* if not overwritten by config switch */
711 inputdev = search_device(DEV_FLAGS_INPUT, stdinname);
712 outputdev = search_device(DEV_FLAGS_OUTPUT, stdoutname);
713 errdev = search_device(DEV_FLAGS_OUTPUT, stderrname);
714 #ifdef CONFIG_CONSOLE_MUX
715 iomux_err = iomux_doenv(stdin, stdinname);
716 iomux_err += iomux_doenv(stdout, stdoutname);
717 iomux_err += iomux_doenv(stderr, stderrname);
719 /* Successful, so skip all the code below. */
723 /* if the devices are overwritten or not found, use default device */
724 if (inputdev == NULL) {
725 inputdev = search_device(DEV_FLAGS_INPUT, "serial");
727 if (outputdev == NULL) {
728 outputdev = search_device(DEV_FLAGS_OUTPUT, "serial");
730 if (errdev == NULL) {
731 errdev = search_device(DEV_FLAGS_OUTPUT, "serial");
733 /* Initializes output console first */
734 if (outputdev != NULL) {
735 /* need to set a console if not done above. */
736 console_doenv(stdout, outputdev);
738 if (errdev != NULL) {
739 /* need to set a console if not done above. */
740 console_doenv(stderr, errdev);
742 if (inputdev != NULL) {
743 /* need to set a console if not done above. */
744 console_doenv(stdin, inputdev);
747 #ifdef CONFIG_CONSOLE_MUX
751 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
752 stdio_print_current_devices();
753 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
755 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
756 /* set the environment variables (will overwrite previous env settings) */
757 for (i = 0; i < 3; i++) {
758 setenv(stdio_names[i], stdio_devices[i]->name);
760 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
762 gd->flags |= GD_FLG_DEVINIT; /* device initialization completed */
765 /* If nothing usable installed, use only the initial console */
766 if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
772 #else /* CONFIG_SYS_CONSOLE_IS_IN_ENV */
774 /* Called after the relocation - use desired console functions */
775 int console_init_r(void)
777 struct stdio_dev *inputdev = NULL, *outputdev = NULL;
779 struct list_head *list = stdio_get_list();
780 struct list_head *pos;
781 struct stdio_dev *dev;
783 #ifdef CONFIG_SPLASH_SCREEN
785 * suppress all output if splash screen is enabled and we have
786 * a bmp to display. We redirect the output from frame buffer
787 * console to serial console in this case or suppress it if
788 * "silent" mode was requested.
790 if (getenv("splashimage") != NULL) {
791 if (!(gd->flags & GD_FLG_SILENT))
792 outputdev = search_device (DEV_FLAGS_OUTPUT, "serial");
796 /* Scan devices looking for input and output devices */
797 list_for_each(pos, list) {
798 dev = list_entry(pos, struct stdio_dev, list);
800 if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) {
803 if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) {
806 if(inputdev && outputdev)
810 /* Initializes output console first */
811 if (outputdev != NULL) {
812 console_setfile(stdout, outputdev);
813 console_setfile(stderr, outputdev);
814 #ifdef CONFIG_CONSOLE_MUX
815 console_devices[stdout][0] = outputdev;
816 console_devices[stderr][0] = outputdev;
820 /* Initializes input console */
821 if (inputdev != NULL) {
822 console_setfile(stdin, inputdev);
823 #ifdef CONFIG_CONSOLE_MUX
824 console_devices[stdin][0] = inputdev;
828 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
829 stdio_print_current_devices();
830 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
832 /* Setting environment variables */
833 for (i = 0; i < 3; i++) {
834 setenv(stdio_names[i], stdio_devices[i]->name);
837 gd->flags |= GD_FLG_DEVINIT; /* device initialization completed */
840 /* If nothing usable installed, use only the initial console */
841 if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
848 #endif /* CONFIG_SYS_CONSOLE_IS_IN_ENV */