xref: /openbmc/u-boot/common/console.c (revision 9450ab2b)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2000
4  * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
5  */
6 
7 #include <common.h>
8 #include <console.h>
9 #include <debug_uart.h>
10 #include <dm.h>
11 #include <stdarg.h>
12 #include <iomux.h>
13 #include <malloc.h>
14 #include <mapmem.h>
15 #include <os.h>
16 #include <serial.h>
17 #include <stdio_dev.h>
18 #include <exports.h>
19 #include <environment.h>
20 #include <watchdog.h>
21 
22 DECLARE_GLOBAL_DATA_PTR;
23 
on_console(const char * name,const char * value,enum env_op op,int flags)24 static int on_console(const char *name, const char *value, enum env_op op,
25 	int flags)
26 {
27 	int console = -1;
28 
29 	/* Check for console redirection */
30 	if (strcmp(name, "stdin") == 0)
31 		console = stdin;
32 	else if (strcmp(name, "stdout") == 0)
33 		console = stdout;
34 	else if (strcmp(name, "stderr") == 0)
35 		console = stderr;
36 
37 	/* if not actually setting a console variable, we don't care */
38 	if (console == -1 || (gd->flags & GD_FLG_DEVINIT) == 0)
39 		return 0;
40 
41 	switch (op) {
42 	case env_op_create:
43 	case env_op_overwrite:
44 
45 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
46 		if (iomux_doenv(console, value))
47 			return 1;
48 #else
49 		/* Try assigning specified device */
50 		if (console_assign(console, value) < 0)
51 			return 1;
52 #endif
53 		return 0;
54 
55 	case env_op_delete:
56 		if ((flags & H_FORCE) == 0)
57 			printf("Can't delete \"%s\"\n", name);
58 		return 1;
59 
60 	default:
61 		return 0;
62 	}
63 }
64 U_BOOT_ENV_CALLBACK(console, on_console);
65 
66 #ifdef CONFIG_SILENT_CONSOLE
on_silent(const char * name,const char * value,enum env_op op,int flags)67 static int on_silent(const char *name, const char *value, enum env_op op,
68 	int flags)
69 {
70 #if !CONFIG_IS_ENABLED(SILENT_CONSOLE_UPDATE_ON_SET)
71 	if (flags & H_INTERACTIVE)
72 		return 0;
73 #endif
74 #if !CONFIG_IS_ENABLED(SILENT_CONSOLE_UPDATE_ON_RELOC)
75 	if ((flags & H_INTERACTIVE) == 0)
76 		return 0;
77 #endif
78 
79 	if (value != NULL)
80 		gd->flags |= GD_FLG_SILENT;
81 	else
82 		gd->flags &= ~GD_FLG_SILENT;
83 
84 	return 0;
85 }
86 U_BOOT_ENV_CALLBACK(silent, on_silent);
87 #endif
88 
89 #if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
90 /*
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
94  */
95 #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
96 extern int overwrite_console(void);
97 #define OVERWRITE_CONSOLE overwrite_console()
98 #else
99 #define OVERWRITE_CONSOLE 0
100 #endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */
101 
102 #endif /* CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
103 
console_setfile(int file,struct stdio_dev * dev)104 static int console_setfile(int file, struct stdio_dev * dev)
105 {
106 	int error = 0;
107 
108 	if (dev == NULL)
109 		return -1;
110 
111 	switch (file) {
112 	case stdin:
113 	case stdout:
114 	case stderr:
115 		/* Start new device */
116 		if (dev->start) {
117 			error = dev->start(dev);
118 			/* If it's not started dont use it */
119 			if (error < 0)
120 				break;
121 		}
122 
123 		/* Assign the new device (leaving the existing one started) */
124 		stdio_devices[file] = dev;
125 
126 		/*
127 		 * Update monitor functions
128 		 * (to use the console stuff by other applications)
129 		 */
130 		switch (file) {
131 		case stdin:
132 			gd->jt->getc = getc;
133 			gd->jt->tstc = tstc;
134 			break;
135 		case stdout:
136 			gd->jt->putc  = putc;
137 			gd->jt->puts  = puts;
138 			gd->jt->printf = printf;
139 			break;
140 		}
141 		break;
142 
143 	default:		/* Invalid file ID */
144 		error = -1;
145 	}
146 	return error;
147 }
148 
149 /**
150  * console_dev_is_serial() - Check if a stdio device is a serial device
151  *
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".
155  */
console_dev_is_serial(struct stdio_dev * sdev)156 static bool console_dev_is_serial(struct stdio_dev *sdev)
157 {
158 	bool is_serial;
159 
160 #ifdef CONFIG_DM_SERIAL
161 	if (sdev->flags & DEV_FLAGS_DM) {
162 		struct udevice *dev = sdev->priv;
163 
164 		is_serial = device_get_uclass_id(dev) == UCLASS_SERIAL;
165 	} else
166 #endif
167 	is_serial = !strcmp(sdev->name, "serial");
168 
169 	return is_serial;
170 }
171 
172 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
173 /** Console I/O multiplexing *******************************************/
174 
175 static struct stdio_dev *tstcdev;
176 struct stdio_dev **console_devices[MAX_FILES];
177 int cd_count[MAX_FILES];
178 
179 /*
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.
184  */
console_getc(int file)185 static int console_getc(int file)
186 {
187 	unsigned char ret;
188 
189 	/* This is never called with testcdev == NULL */
190 	ret = tstcdev->getc(tstcdev);
191 	tstcdev = NULL;
192 	return ret;
193 }
194 
console_tstc(int file)195 static int console_tstc(int file)
196 {
197 	int i, ret;
198 	struct stdio_dev *dev;
199 	int prev;
200 
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);
206 			if (ret > 0) {
207 				tstcdev = dev;
208 				disable_ctrlc(prev);
209 				return ret;
210 			}
211 		}
212 	}
213 	disable_ctrlc(prev);
214 
215 	return 0;
216 }
217 
console_putc(int file,const char c)218 static void console_putc(int file, const char c)
219 {
220 	int i;
221 	struct stdio_dev *dev;
222 
223 	for (i = 0; i < cd_count[file]; i++) {
224 		dev = console_devices[file][i];
225 		if (dev->putc != NULL)
226 			dev->putc(dev, c);
227 	}
228 }
229 
console_puts_noserial(int file,const char * s)230 static void console_puts_noserial(int file, const char *s)
231 {
232 	int i;
233 	struct stdio_dev *dev;
234 
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))
238 			dev->puts(dev, s);
239 	}
240 }
241 
console_puts(int file,const char * s)242 static void console_puts(int file, const char *s)
243 {
244 	int i;
245 	struct stdio_dev *dev;
246 
247 	for (i = 0; i < cd_count[file]; i++) {
248 		dev = console_devices[file][i];
249 		if (dev->puts != NULL)
250 			dev->puts(dev, s);
251 	}
252 }
253 
console_doenv(int file,struct stdio_dev * dev)254 static inline void console_doenv(int file, struct stdio_dev *dev)
255 {
256 	iomux_doenv(file, dev->name);
257 }
258 #else
console_getc(int file)259 static inline int console_getc(int file)
260 {
261 	return stdio_devices[file]->getc(stdio_devices[file]);
262 }
263 
console_tstc(int file)264 static inline int console_tstc(int file)
265 {
266 	return stdio_devices[file]->tstc(stdio_devices[file]);
267 }
268 
console_putc(int file,const char c)269 static inline void console_putc(int file, const char c)
270 {
271 	stdio_devices[file]->putc(stdio_devices[file], c);
272 }
273 
console_puts_noserial(int file,const char * s)274 static inline void console_puts_noserial(int file, const char *s)
275 {
276 	if (!console_dev_is_serial(stdio_devices[file]))
277 		stdio_devices[file]->puts(stdio_devices[file], s);
278 }
279 
console_puts(int file,const char * s)280 static inline void console_puts(int file, const char *s)
281 {
282 	stdio_devices[file]->puts(stdio_devices[file], s);
283 }
284 
console_doenv(int file,struct stdio_dev * dev)285 static inline void console_doenv(int file, struct stdio_dev *dev)
286 {
287 	console_setfile(file, dev);
288 }
289 #endif /* CONIFIG_IS_ENABLED(CONSOLE_MUX) */
290 
291 /** U-Boot INITIAL CONSOLE-NOT COMPATIBLE FUNCTIONS *************************/
292 
serial_printf(const char * fmt,...)293 int serial_printf(const char *fmt, ...)
294 {
295 	va_list args;
296 	uint i;
297 	char printbuffer[CONFIG_SYS_PBSIZE];
298 
299 	va_start(args, fmt);
300 
301 	/* For this to work, printbuffer must be larger than
302 	 * anything we ever want to print.
303 	 */
304 	i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
305 	va_end(args);
306 
307 	serial_puts(printbuffer);
308 	return i;
309 }
310 
fgetc(int file)311 int fgetc(int file)
312 {
313 	if (file < MAX_FILES) {
314 		/*
315 		 * Effectively poll for input wherever it may be available.
316 		 */
317 		for (;;) {
318 			WATCHDOG_RESET();
319 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
320 			/*
321 			 * Upper layer may have already called tstc() so
322 			 * check for that first.
323 			 */
324 			if (tstcdev != NULL)
325 				return console_getc(file);
326 			console_tstc(file);
327 #else
328 			if (console_tstc(file))
329 				return console_getc(file);
330 #endif
331 #ifdef CONFIG_WATCHDOG
332 			/*
333 			 * If the watchdog must be rate-limited then it should
334 			 * already be handled in board-specific code.
335 			 */
336 			 udelay(1);
337 #endif
338 		}
339 	}
340 
341 	return -1;
342 }
343 
ftstc(int file)344 int ftstc(int file)
345 {
346 	if (file < MAX_FILES)
347 		return console_tstc(file);
348 
349 	return -1;
350 }
351 
fputc(int file,const char c)352 void fputc(int file, const char c)
353 {
354 	if (file < MAX_FILES)
355 		console_putc(file, c);
356 }
357 
fputs(int file,const char * s)358 void fputs(int file, const char *s)
359 {
360 	if (file < MAX_FILES)
361 		console_puts(file, s);
362 }
363 
fprintf(int file,const char * fmt,...)364 int fprintf(int file, const char *fmt, ...)
365 {
366 	va_list args;
367 	uint i;
368 	char printbuffer[CONFIG_SYS_PBSIZE];
369 
370 	va_start(args, fmt);
371 
372 	/* For this to work, printbuffer must be larger than
373 	 * anything we ever want to print.
374 	 */
375 	i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
376 	va_end(args);
377 
378 	/* Send to desired file */
379 	fputs(file, printbuffer);
380 	return i;
381 }
382 
383 /** U-Boot INITIAL CONSOLE-COMPATIBLE FUNCTION *****************************/
384 
getc(void)385 int getc(void)
386 {
387 #ifdef CONFIG_DISABLE_CONSOLE
388 	if (gd->flags & GD_FLG_DISABLE_CONSOLE)
389 		return 0;
390 #endif
391 
392 	if (!gd->have_console)
393 		return 0;
394 
395 #ifdef CONFIG_CONSOLE_RECORD
396 	if (gd->console_in.start) {
397 		int ch;
398 
399 		ch = membuff_getbyte(&gd->console_in);
400 		if (ch != -1)
401 			return 1;
402 	}
403 #endif
404 	if (gd->flags & GD_FLG_DEVINIT) {
405 		/* Get from the standard input */
406 		return fgetc(stdin);
407 	}
408 
409 	/* Send directly to the handler */
410 	return serial_getc();
411 }
412 
tstc(void)413 int tstc(void)
414 {
415 #ifdef CONFIG_DISABLE_CONSOLE
416 	if (gd->flags & GD_FLG_DISABLE_CONSOLE)
417 		return 0;
418 #endif
419 
420 	if (!gd->have_console)
421 		return 0;
422 #ifdef CONFIG_CONSOLE_RECORD
423 	if (gd->console_in.start) {
424 		if (membuff_peekbyte(&gd->console_in) != -1)
425 			return 1;
426 	}
427 #endif
428 	if (gd->flags & GD_FLG_DEVINIT) {
429 		/* Test the standard input */
430 		return ftstc(stdin);
431 	}
432 
433 	/* Send directly to the handler */
434 	return serial_tstc();
435 }
436 
437 #define PRE_CONSOLE_FLUSHPOINT1_SERIAL			0
438 #define PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL	1
439 
440 #if CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
441 #define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_PRE_CON_BUF_SZ)
442 
pre_console_putc(const char c)443 static void pre_console_putc(const char c)
444 {
445 	char *buffer;
446 
447 	buffer = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
448 
449 	buffer[CIRC_BUF_IDX(gd->precon_buf_idx++)] = c;
450 
451 	unmap_sysmem(buffer);
452 }
453 
pre_console_puts(const char * s)454 static void pre_console_puts(const char *s)
455 {
456 	while (*s)
457 		pre_console_putc(*s++);
458 }
459 
print_pre_console_buffer(int flushpoint)460 static void print_pre_console_buffer(int flushpoint)
461 {
462 	unsigned long in = 0, out = 0;
463 	char buf_out[CONFIG_PRE_CON_BUF_SZ + 1];
464 	char *buf_in;
465 
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;
469 
470 	while (in < gd->precon_buf_idx)
471 		buf_out[out++] = buf_in[CIRC_BUF_IDX(in++)];
472 	unmap_sysmem(buf_in);
473 
474 	buf_out[out] = 0;
475 
476 	switch (flushpoint) {
477 	case PRE_CONSOLE_FLUSHPOINT1_SERIAL:
478 		puts(buf_out);
479 		break;
480 	case PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL:
481 		console_puts_noserial(stdout, buf_out);
482 		break;
483 	}
484 }
485 #else
pre_console_putc(const char c)486 static inline void pre_console_putc(const char c) {}
pre_console_puts(const char * s)487 static inline void pre_console_puts(const char *s) {}
print_pre_console_buffer(int flushpoint)488 static inline void print_pre_console_buffer(int flushpoint) {}
489 #endif
490 
putc(const char c)491 void putc(const char c)
492 {
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)) {
496 		os_putc(c);
497 		return;
498 	}
499 #endif
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)) {
503 		printch(c);
504 		return;
505 	}
506 #endif
507 	if (!gd)
508 		return;
509 #ifdef CONFIG_CONSOLE_RECORD
510 	if ((gd->flags & GD_FLG_RECORD) && gd->console_out.start)
511 		membuff_putbyte(&gd->console_out, c);
512 #endif
513 #ifdef CONFIG_SILENT_CONSOLE
514 	if (gd->flags & GD_FLG_SILENT)
515 		return;
516 #endif
517 
518 #ifdef CONFIG_DISABLE_CONSOLE
519 	if (gd->flags & GD_FLG_DISABLE_CONSOLE)
520 		return;
521 #endif
522 
523 	if (!gd->have_console)
524 		return pre_console_putc(c);
525 
526 	if (gd->flags & GD_FLG_DEVINIT) {
527 		/* Send to the standard output */
528 		fputc(stdout, c);
529 	} else {
530 		/* Send directly to the handler */
531 		pre_console_putc(c);
532 		serial_putc(c);
533 	}
534 }
535 
puts(const char * s)536 void puts(const char *s)
537 {
538 #ifdef CONFIG_SANDBOX
539 	/* sandbox can send characters to stdout before it has a console */
540 	if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
541 		os_puts(s);
542 		return;
543 	}
544 #endif
545 #ifdef CONFIG_DEBUG_UART
546 	if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
547 		while (*s) {
548 			int ch = *s++;
549 
550 			printch(ch);
551 		}
552 		return;
553 	}
554 #endif
555 	if (!gd)
556 		return;
557 #ifdef CONFIG_CONSOLE_RECORD
558 	if ((gd->flags & GD_FLG_RECORD) && gd->console_out.start)
559 		membuff_put(&gd->console_out, s, strlen(s));
560 #endif
561 #ifdef CONFIG_SILENT_CONSOLE
562 	if (gd->flags & GD_FLG_SILENT)
563 		return;
564 #endif
565 
566 #ifdef CONFIG_DISABLE_CONSOLE
567 	if (gd->flags & GD_FLG_DISABLE_CONSOLE)
568 		return;
569 #endif
570 
571 	if (!gd->have_console)
572 		return pre_console_puts(s);
573 
574 	if (gd->flags & GD_FLG_DEVINIT) {
575 		/* Send to the standard output */
576 		fputs(stdout, s);
577 	} else {
578 		/* Send directly to the handler */
579 		pre_console_puts(s);
580 		serial_puts(s);
581 	}
582 }
583 
584 #ifdef CONFIG_CONSOLE_RECORD
console_record_init(void)585 int console_record_init(void)
586 {
587 	int ret;
588 
589 	ret = membuff_new(&gd->console_out, CONFIG_CONSOLE_RECORD_OUT_SIZE);
590 	if (ret)
591 		return ret;
592 	ret = membuff_new(&gd->console_in, CONFIG_CONSOLE_RECORD_IN_SIZE);
593 
594 	return ret;
595 }
596 
console_record_reset(void)597 void console_record_reset(void)
598 {
599 	membuff_purge(&gd->console_out);
600 	membuff_purge(&gd->console_in);
601 }
602 
console_record_reset_enable(void)603 void console_record_reset_enable(void)
604 {
605 	console_record_reset();
606 	gd->flags |= GD_FLG_RECORD;
607 }
608 #endif
609 
610 /* test if ctrl-c was pressed */
611 static int ctrlc_disabled = 0;	/* see disable_ctrl() */
612 static int ctrlc_was_pressed = 0;
ctrlc(void)613 int ctrlc(void)
614 {
615 	if (!ctrlc_disabled && gd->have_console) {
616 		if (tstc()) {
617 			switch (getc()) {
618 			case 0x03:		/* ^C - Control C */
619 				ctrlc_was_pressed = 1;
620 				return 1;
621 			default:
622 				break;
623 			}
624 		}
625 	}
626 
627 	return 0;
628 }
629 /* Reads user's confirmation.
630    Returns 1 if user's input is "y", "Y", "yes" or "YES"
631 */
confirm_yesno(void)632 int confirm_yesno(void)
633 {
634 	int i;
635 	char str_input[5];
636 
637 	/* Flush input */
638 	while (tstc())
639 		getc();
640 	i = 0;
641 	while (i < sizeof(str_input)) {
642 		str_input[i] = getc();
643 		putc(str_input[i]);
644 		if (str_input[i] == '\r')
645 			break;
646 		i++;
647 	}
648 	putc('\n');
649 	if (strncmp(str_input, "y\r", 2) == 0 ||
650 	    strncmp(str_input, "Y\r", 2) == 0 ||
651 	    strncmp(str_input, "yes\r", 4) == 0 ||
652 	    strncmp(str_input, "YES\r", 4) == 0)
653 		return 1;
654 	return 0;
655 }
656 /* pass 1 to disable ctrlc() checking, 0 to enable.
657  * returns previous state
658  */
disable_ctrlc(int disable)659 int disable_ctrlc(int disable)
660 {
661 	int prev = ctrlc_disabled;	/* save previous state */
662 
663 	ctrlc_disabled = disable;
664 	return prev;
665 }
666 
had_ctrlc(void)667 int had_ctrlc (void)
668 {
669 	return ctrlc_was_pressed;
670 }
671 
clear_ctrlc(void)672 void clear_ctrlc(void)
673 {
674 	ctrlc_was_pressed = 0;
675 }
676 
677 /** U-Boot INIT FUNCTIONS *************************************************/
678 
search_device(int flags,const char * name)679 struct stdio_dev *search_device(int flags, const char *name)
680 {
681 	struct stdio_dev *dev;
682 
683 	dev = stdio_get_by_name(name);
684 #ifdef CONFIG_VIDCONSOLE_AS_LCD
685 	if (!dev && !strcmp(name, "lcd"))
686 		dev = stdio_get_by_name("vidconsole");
687 #endif
688 
689 	if (dev && (dev->flags & flags))
690 		return dev;
691 
692 	return NULL;
693 }
694 
console_assign(int file,const char * devname)695 int console_assign(int file, const char *devname)
696 {
697 	int flag;
698 	struct stdio_dev *dev;
699 
700 	/* Check for valid file */
701 	switch (file) {
702 	case stdin:
703 		flag = DEV_FLAGS_INPUT;
704 		break;
705 	case stdout:
706 	case stderr:
707 		flag = DEV_FLAGS_OUTPUT;
708 		break;
709 	default:
710 		return -1;
711 	}
712 
713 	/* Check for valid device name */
714 
715 	dev = search_device(flag, devname);
716 
717 	if (dev)
718 		return console_setfile(file, dev);
719 
720 	return -1;
721 }
722 
console_update_silent(void)723 static void console_update_silent(void)
724 {
725 #ifdef CONFIG_SILENT_CONSOLE
726 	if (env_get("silent") != NULL)
727 		gd->flags |= GD_FLG_SILENT;
728 	else
729 		gd->flags &= ~GD_FLG_SILENT;
730 #endif
731 }
732 
console_announce_r(void)733 int console_announce_r(void)
734 {
735 #if !CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
736 	char buf[DISPLAY_OPTIONS_BANNER_LENGTH];
737 
738 	display_options_get_banner(false, buf, sizeof(buf));
739 
740 	console_puts_noserial(stdout, buf);
741 #endif
742 
743 	return 0;
744 }
745 
746 /* Called before relocation - use serial functions */
console_init_f(void)747 int console_init_f(void)
748 {
749 	gd->have_console = 1;
750 
751 	console_update_silent();
752 
753 	print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT1_SERIAL);
754 
755 	return 0;
756 }
757 
stdio_print_current_devices(void)758 void stdio_print_current_devices(void)
759 {
760 	/* Print information */
761 	puts("In:    ");
762 	if (stdio_devices[stdin] == NULL) {
763 		puts("No input devices available!\n");
764 	} else {
765 		printf ("%s\n", stdio_devices[stdin]->name);
766 	}
767 
768 	puts("Out:   ");
769 	if (stdio_devices[stdout] == NULL) {
770 		puts("No output devices available!\n");
771 	} else {
772 		printf ("%s\n", stdio_devices[stdout]->name);
773 	}
774 
775 	puts("Err:   ");
776 	if (stdio_devices[stderr] == NULL) {
777 		puts("No error devices available!\n");
778 	} else {
779 		printf ("%s\n", stdio_devices[stderr]->name);
780 	}
781 }
782 
783 #if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
784 /* Called after the relocation - use desired console functions */
console_init_r(void)785 int console_init_r(void)
786 {
787 	char *stdinname, *stdoutname, *stderrname;
788 	struct stdio_dev *inputdev = NULL, *outputdev = NULL, *errdev = NULL;
789 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
790 	int i;
791 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
792 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
793 	int iomux_err = 0;
794 #endif
795 
796 	/* set default handlers at first */
797 	gd->jt->getc  = serial_getc;
798 	gd->jt->tstc  = serial_tstc;
799 	gd->jt->putc  = serial_putc;
800 	gd->jt->puts  = serial_puts;
801 	gd->jt->printf = serial_printf;
802 
803 	/* stdin stdout and stderr are in environment */
804 	/* scan for it */
805 	stdinname  = env_get("stdin");
806 	stdoutname = env_get("stdout");
807 	stderrname = env_get("stderr");
808 
809 	if (OVERWRITE_CONSOLE == 0) {	/* if not overwritten by config switch */
810 		inputdev  = search_device(DEV_FLAGS_INPUT,  stdinname);
811 		outputdev = search_device(DEV_FLAGS_OUTPUT, stdoutname);
812 		errdev    = search_device(DEV_FLAGS_OUTPUT, stderrname);
813 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
814 		iomux_err = iomux_doenv(stdin, stdinname);
815 		iomux_err += iomux_doenv(stdout, stdoutname);
816 		iomux_err += iomux_doenv(stderr, stderrname);
817 		if (!iomux_err)
818 			/* Successful, so skip all the code below. */
819 			goto done;
820 #endif
821 	}
822 	/* if the devices are overwritten or not found, use default device */
823 	if (inputdev == NULL) {
824 		inputdev  = search_device(DEV_FLAGS_INPUT,  "serial");
825 	}
826 	if (outputdev == NULL) {
827 		outputdev = search_device(DEV_FLAGS_OUTPUT, "serial");
828 	}
829 	if (errdev == NULL) {
830 		errdev    = search_device(DEV_FLAGS_OUTPUT, "serial");
831 	}
832 	/* Initializes output console first */
833 	if (outputdev != NULL) {
834 		/* need to set a console if not done above. */
835 		console_doenv(stdout, outputdev);
836 	}
837 	if (errdev != NULL) {
838 		/* need to set a console if not done above. */
839 		console_doenv(stderr, errdev);
840 	}
841 	if (inputdev != NULL) {
842 		/* need to set a console if not done above. */
843 		console_doenv(stdin, inputdev);
844 	}
845 
846 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
847 done:
848 #endif
849 
850 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
851 	stdio_print_current_devices();
852 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
853 #ifdef CONFIG_VIDCONSOLE_AS_LCD
854 	if (strstr(stdoutname, "lcd"))
855 		printf("Warning: Please change 'lcd' to 'vidconsole' in stdout/stderr environment vars\n");
856 #endif
857 
858 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
859 	/* set the environment variables (will overwrite previous env settings) */
860 	for (i = 0; i < MAX_FILES; i++) {
861 		env_set(stdio_names[i], stdio_devices[i]->name);
862 	}
863 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
864 
865 	gd->flags |= GD_FLG_DEVINIT;	/* device initialization completed */
866 
867 #if 0
868 	/* If nothing usable installed, use only the initial console */
869 	if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
870 		return 0;
871 #endif
872 	print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL);
873 	return 0;
874 }
875 
876 #else /* !CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
877 
878 /* Called after the relocation - use desired console functions */
console_init_r(void)879 int console_init_r(void)
880 {
881 	struct stdio_dev *inputdev = NULL, *outputdev = NULL;
882 	int i;
883 	struct list_head *list = stdio_get_list();
884 	struct list_head *pos;
885 	struct stdio_dev *dev;
886 
887 	console_update_silent();
888 
889 #ifdef CONFIG_SPLASH_SCREEN
890 	/*
891 	 * suppress all output if splash screen is enabled and we have
892 	 * a bmp to display. We redirect the output from frame buffer
893 	 * console to serial console in this case or suppress it if
894 	 * "silent" mode was requested.
895 	 */
896 	if (env_get("splashimage") != NULL) {
897 		if (!(gd->flags & GD_FLG_SILENT))
898 			outputdev = search_device (DEV_FLAGS_OUTPUT, "serial");
899 	}
900 #endif
901 
902 	/* Scan devices looking for input and output devices */
903 	list_for_each(pos, list) {
904 		dev = list_entry(pos, struct stdio_dev, list);
905 
906 		if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) {
907 			inputdev = dev;
908 		}
909 		if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) {
910 			outputdev = dev;
911 		}
912 		if(inputdev && outputdev)
913 			break;
914 	}
915 
916 	/* Initializes output console first */
917 	if (outputdev != NULL) {
918 		console_setfile(stdout, outputdev);
919 		console_setfile(stderr, outputdev);
920 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
921 		console_devices[stdout][0] = outputdev;
922 		console_devices[stderr][0] = outputdev;
923 #endif
924 	}
925 
926 	/* Initializes input console */
927 	if (inputdev != NULL) {
928 		console_setfile(stdin, inputdev);
929 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
930 		console_devices[stdin][0] = inputdev;
931 #endif
932 	}
933 
934 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
935 	stdio_print_current_devices();
936 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
937 
938 	/* Setting environment variables */
939 	for (i = 0; i < MAX_FILES; i++) {
940 		env_set(stdio_names[i], stdio_devices[i]->name);
941 	}
942 
943 	gd->flags |= GD_FLG_DEVINIT;	/* device initialization completed */
944 
945 #if 0
946 	/* If nothing usable installed, use only the initial console */
947 	if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
948 		return 0;
949 #endif
950 	print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL);
951 	return 0;
952 }
953 
954 #endif /* CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
955