[J-u-boot.git] / common / iomux.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2008
 * Gary Jennejohn, DENX Software Engineering GmbH, [email protected].
 */

#include <common.h>
#include <console.h>
#include <serial.h>
#include <malloc.h>

#if CONFIG_IS_ENABLED(CONSOLE_MUX)
void iomux_printdevs(const int console)
{
	int i;
	struct stdio_dev *dev;

	for (i = 0; i < cd_count[console]; i++) {
		dev = console_devices[console][i];
		printf("%s ", dev->name);
	}
	printf("\n");
}

/* This tries to preserve the old list if an error occurs. */
int iomux_doenv(const int console, const char *arg)
{
	char *console_args, *temp, **start;
	int i, j, k, io_flag, cs_idx, repeat;
	struct stdio_dev *dev;
	struct stdio_dev **cons_set;

	console_args = strdup(arg);
	if (console_args == NULL)
		return 1;
	/*
	 * Check whether a comma separated list of devices was
	 * entered and count how many devices were entered.
	 * The array start[] has pointers to the beginning of
	 * each device name (up to MAX_CONSARGS devices).
	 *
	 * Have to do this twice - once to count the number of
	 * commas and then again to populate start.
	 */
	i = 0;
	temp = console_args;
	for (;;) {
		temp = strchr(temp, ',');
		if (temp != NULL) {
			i++;
			temp++;
			continue;
		}
		/* There's always one entry more than the number of commas. */
		i++;
		break;
	}
	start = (char **)malloc(i * sizeof(char *));
	if (start == NULL) {
		free(console_args);
		return 1;
	}
	i = 0;
	start[0] = console_args;
	for (;;) {
		temp = strchr(start[i++], ',');
		if (temp == NULL)
			break;
		*temp = '\0';
		start[i] = temp + 1;
	}
	cons_set = (struct stdio_dev **)calloc(i, sizeof(struct stdio_dev *));
	if (cons_set == NULL) {
		free(start);
		free(console_args);
		return 1;
	}

	switch (console) {
	case stdin:
		io_flag = DEV_FLAGS_INPUT;
		break;
	case stdout:
	case stderr:
		io_flag = DEV_FLAGS_OUTPUT;
		break;
	default:
		free(start);
		free(console_args);
		free(cons_set);
		return 1;
	}

	cs_idx = 0;
	for (j = 0; j < i; j++) {
		/*
		 * Check whether the device exists and is valid.
		 * console_assign() also calls search_device(),
		 * but I need the pointer to the device.
		 */
		dev = search_device(io_flag, start[j]);
		if (dev == NULL)
			continue;
		/*
		 * Prevent multiple entries for a device.
		 */
		 repeat = 0;
		 for (k = 0; k < cs_idx; k++) {
			if (dev == cons_set[k]) {
				repeat++;
				break;
			}
		 }
		 if (repeat)
			continue;
		/*
		 * Try assigning the specified device.
		 * This could screw up the console settings for apps.
		 */
		if (console_assign(console, start[j]) < 0)
			continue;
		cons_set[cs_idx++] = dev;
	}
	free(console_args);
	free(start);
	/* failed to set any console */
	if (cs_idx == 0) {
		free(cons_set);
		return 1;
	} else {
		/* Works even if console_devices[console] is NULL. */
		console_devices[console] =
			(struct stdio_dev **)realloc(console_devices[console],
			cs_idx * sizeof(struct stdio_dev *));
		if (console_devices[console] == NULL) {
			free(cons_set);
			return 1;
		}
		memcpy(console_devices[console], cons_set, cs_idx *
			sizeof(struct stdio_dev *));

		cd_count[console] = cs_idx;
	}
	free(cons_set);
	return 0;
}
#endif /* CONSOLE_MUX */
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
16a28ef2 GJ	2	/*
	3	* (C) Copyright 2008
	4	* Gary Jennejohn, DENX Software Engineering GmbH, [email protected].
16a28ef2 GJ	5	*/
	6
	7	#include <common.h>
24b852a7	8	#include <console.h>
16a28ef2 GJ	9	#include <serial.h>
	10	#include <malloc.h>
	11
b0265429	12	#if CONFIG_IS_ENABLED(CONSOLE_MUX)
16a28ef2 GJ	13	void iomux_printdevs(const int console)
	14	{
	15	int i;
52cb4d4f	16	struct stdio_dev *dev;
16a28ef2 GJ	17
	18	for (i = 0; i < cd_count[console]; i++) {
	19	dev = console_devices[console][i];
	20	printf("%s ", dev->name);
	21	}
	22	printf("\n");
	23	}
	24
	25	/* This tries to preserve the old list if an error occurs. */
	26	int iomux_doenv(const int console, const char *arg)
	27	{
	28	char console_args, temp, **start;
	29	int i, j, k, io_flag, cs_idx, repeat;
52cb4d4f JCPV	30	struct stdio_dev *dev;
52cb4d4f JCPV	31	struct stdio_dev **cons_set;
16a28ef2 GJ	32
	33	console_args = strdup(arg);
	34	if (console_args == NULL)
	35	return 1;
	36	/*
	37	* Check whether a comma separated list of devices was
	38	* entered and count how many devices were entered.
	39	* The array start[] has pointers to the beginning of
	40	* each device name (up to MAX_CONSARGS devices).
	41	*
	42	* Have to do this twice - once to count the number of
	43	* commas and then again to populate start.
	44	*/
	45	i = 0;
	46	temp = console_args;
	47	for (;;) {
	48	temp = strchr(temp, ',');
	49	if (temp != NULL) {
	50	i++;
	51	temp++;
	52	continue;
	53	}
	54	/* There's always one entry more than the number of commas. */
	55	i++;
	56	break;
	57	}
	58	start = (char *)malloc(i sizeof(char *));
	59	if (start == NULL) {
	60	free(console_args);
	61	return 1;
	62	}
	63	i = 0;
	64	start[0] = console_args;
	65	for (;;) {
	66	temp = strchr(start[i++], ',');
	67	if (temp == NULL)
	68	break;
	69	*temp = '\0';
	70	start[i] = temp + 1;
	71	}
52cb4d4f	72	cons_set = (struct stdio_dev *)calloc(i, sizeof(struct stdio_dev ));
16a28ef2 GJ	73	if (cons_set == NULL) {
	74	free(start);
	75	free(console_args);
	76	return 1;
	77	}
	78
	79	switch (console) {
	80	case stdin:
	81	io_flag = DEV_FLAGS_INPUT;
	82	break;
	83	case stdout:
	84	case stderr:
	85	io_flag = DEV_FLAGS_OUTPUT;
	86	break;
	87	default:
	88	free(start);
	89	free(console_args);
	90	free(cons_set);
	91	return 1;
	92	}
	93
	94	cs_idx = 0;
	95	for (j = 0; j < i; j++) {
	96	/*
	97	* Check whether the device exists and is valid.
	98	* console_assign() also calls search_device(),
	99	* but I need the pointer to the device.
	100	*/
	101	dev = search_device(io_flag, start[j]);
	102	if (dev == NULL)
	103	continue;
	104	/*
	105	* Prevent multiple entries for a device.
	106	*/
	107	repeat = 0;
	108	for (k = 0; k < cs_idx; k++) {
	109	if (dev == cons_set[k]) {
	110	repeat++;
	111	break;
	112	}
	113	}
	114	if (repeat)
	115	continue;
	116	/*
	117	* Try assigning the specified device.
	118	* This could screw up the console settings for apps.
	119	*/
	120	if (console_assign(console, start[j]) < 0)
	121	continue;
16a28ef2 GJ	122	cons_set[cs_idx++] = dev;
	123	}
	124	free(console_args);
	125	free(start);
	126	/* failed to set any console */
	127	if (cs_idx == 0) {
	128	free(cons_set);
	129	return 1;
	130	} else {
	131	/* Works even if console_devices[console] is NULL. */
	132	console_devices[console] =
52cb4d4f JCPV	133	(struct stdio_dev **)realloc(console_devices[console],
52cb4d4f JCPV	134	cs_idx * sizeof(struct stdio_dev *));
16a28ef2 GJ	135	if (console_devices[console] == NULL) {
	136	free(cons_set);
	137	return 1;
	138	}
	139	memcpy(console_devices[console], cons_set, cs_idx *
52cb4d4f	140	sizeof(struct stdio_dev *));
16a28ef2 GJ	141
	142	cd_count[console] = cs_idx;
	143	}
	144	free(cons_set);
	145	return 0;
	146	}
b0265429	147	#endif /* CONSOLE_MUX */