[J-u-boot.git] / cmd / fuse.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2009-2013 ADVANSEE
 * Benoît Thébaudeau <[email protected]>
 *
 * Based on the mpc512x iim code:
 * Copyright 2008 Silicon Turnkey Express, Inc.
 * Martha Marx <[email protected]>
 */

#include <common.h>
#include <command.h>
#include <console.h>
#include <fuse.h>
#include <linux/errno.h>

static int strtou32(const char *str, unsigned int base, u32 *result)
{
	char *ep;

	*result = simple_strtoul(str, &ep, base);
	if (ep == str || *ep != '\0')
		return -EINVAL;

	return 0;
}

static int confirm_prog(void)
{
	puts("Warning: Programming fuses is an irreversible operation!\n"
			"         This may brick your system.\n"
			"         Use this command only if you are sure of "
					"what you are doing!\n"
			"\nReally perform this fuse programming? <y/N>\n");

	if (confirm_yesno())
		return 1;

	puts("Fuse programming aborted\n");
	return 0;
}

static int do_fuse(struct cmd_tbl *cmdtp, int flag, int argc,
		   char *const argv[])
{
	const char *op = argc >= 2 ? argv[1] : NULL;
	int confirmed = argc >= 3 && !strcmp(argv[2], "-y");
	u32 bank, word, cnt, val;
	int ret, i;

	argc -= 2 + confirmed;
	argv += 2 + confirmed;

	if (argc < 2 || strtou32(argv[0], 0, &bank) ||
			strtou32(argv[1], 0, &word))
		return CMD_RET_USAGE;

	if (!strcmp(op, "read")) {
		if (argc == 2)
			cnt = 1;
		else if (argc != 3 || strtou32(argv[2], 0, &cnt))
			return CMD_RET_USAGE;

		printf("Reading bank %u:\n", bank);
		for (i = 0; i < cnt; i++, word++) {
			if (!(i % 4))
				printf("\nWord 0x%.8x:", word);

			ret = fuse_read(bank, word, &val);
			if (ret)
				goto err;

			printf(" %.8x", val);
		}
		putc('\n');
	} else if (!strcmp(op, "sense")) {
		if (argc == 2)
			cnt = 1;
		else if (argc != 3 || strtou32(argv[2], 0, &cnt))
			return CMD_RET_USAGE;

		printf("Sensing bank %u:\n", bank);
		for (i = 0; i < cnt; i++, word++) {
			if (!(i % 4))
				printf("\nWord 0x%.8x:", word);

			ret = fuse_sense(bank, word, &val);
			if (ret)
				goto err;

			printf(" %.8x", val);
		}
		putc('\n');
	} else if (!strcmp(op, "prog")) {
		if (argc < 3)
			return CMD_RET_USAGE;

		for (i = 2; i < argc; i++, word++) {
			if (strtou32(argv[i], 16, &val))
				return CMD_RET_USAGE;

			printf("Programming bank %u word 0x%.8x to 0x%.8x...\n",
					bank, word, val);
			if (!confirmed && !confirm_prog())
				return CMD_RET_FAILURE;
			ret = fuse_prog(bank, word, val);
			if (ret)
				goto err;
		}
	} else if (!strcmp(op, "override")) {
		if (argc < 3)
			return CMD_RET_USAGE;

		for (i = 2; i < argc; i++, word++) {
			if (strtou32(argv[i], 16, &val))
				return CMD_RET_USAGE;

			printf("Overriding bank %u word 0x%.8x with "
					"0x%.8x...\n", bank, word, val);
			ret = fuse_override(bank, word, val);
			if (ret)
				goto err;
		}
	} else {
		return CMD_RET_USAGE;
	}

	return 0;

err:
	puts("ERROR\n");
	return CMD_RET_FAILURE;
}

U_BOOT_CMD(
	fuse, CONFIG_SYS_MAXARGS, 0, do_fuse,
	"Fuse sub-system",
	     "read <bank> <word> [<cnt>] - read 1 or 'cnt' fuse words,\n"
	"    starting at 'word'\n"
	"fuse sense <bank> <word> [<cnt>] - sense 1 or 'cnt' fuse words,\n"
	"    starting at 'word'\n"
	"fuse prog [-y] <bank> <word> <hexval> [<hexval>...] - program 1 or\n"
	"    several fuse words, starting at 'word' (PERMANENT)\n"
	"fuse override <bank> <word> <hexval> [<hexval>...] - override 1 or\n"
	"    several fuse words, starting at 'word'"
);
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
ccca7dfd BT	2	/*
	3	* (C) Copyright 2009-2013 ADVANSEE
	4	* Benoît Thébaudeau <[email protected]>
	5	*
	6	* Based on the mpc512x iim code:
	7	* Copyright 2008 Silicon Turnkey Express, Inc.
	8	* Martha Marx <[email protected]>
ccca7dfd BT	9	*/
	10
	11	#include <common.h>
	12	#include <command.h>
24b852a7	13	#include <console.h>
ccca7dfd	14	#include <fuse.h>
1221ce45	15	#include <linux/errno.h>
ccca7dfd BT	16
	17	static int strtou32(const char str, unsigned int base, u32 result)
	18	{
	19	char *ep;
	20
	21	*result = simple_strtoul(str, &ep, base);
	22	if (ep == str \|\| *ep != '\0')
	23	return -EINVAL;
	24
	25	return 0;
	26	}
	27
	28	static int confirm_prog(void)
	29	{
	30	puts("Warning: Programming fuses is an irreversible operation!\n"
	31	" This may brick your system.\n"
	32	" Use this command only if you are sure of "
	33	"what you are doing!\n"
	34	"\nReally perform this fuse programming? <y/N>\n");
	35
a5dffa4b PA	36	if (confirm_yesno())
a5dffa4b PA	37	return 1;
ccca7dfd BT	38
	39	puts("Fuse programming aborted\n");
	40	return 0;
	41	}
	42
09140113 SG	43	static int do_fuse(struct cmd_tbl *cmdtp, int flag, int argc,
09140113 SG	44	char *const argv[])
ccca7dfd BT	45	{
	46	const char *op = argc >= 2 ? argv[1] : NULL;
	47	int confirmed = argc >= 3 && !strcmp(argv[2], "-y");
	48	u32 bank, word, cnt, val;
	49	int ret, i;
	50
	51	argc -= 2 + confirmed;
	52	argv += 2 + confirmed;
	53
	54	if (argc < 2 \|\| strtou32(argv[0], 0, &bank) \|\|
	55	strtou32(argv[1], 0, &word))
	56	return CMD_RET_USAGE;
	57
	58	if (!strcmp(op, "read")) {
	59	if (argc == 2)
	60	cnt = 1;
	61	else if (argc != 3 \|\| strtou32(argv[2], 0, &cnt))
	62	return CMD_RET_USAGE;
	63
	64	printf("Reading bank %u:\n", bank);
	65	for (i = 0; i < cnt; i++, word++) {
	66	if (!(i % 4))
	67	printf("\nWord 0x%.8x:", word);
	68
	69	ret = fuse_read(bank, word, &val);
	70	if (ret)
	71	goto err;
	72
	73	printf(" %.8x", val);
	74	}
	75	putc('\n');
	76	} else if (!strcmp(op, "sense")) {
	77	if (argc == 2)
	78	cnt = 1;
	79	else if (argc != 3 \|\| strtou32(argv[2], 0, &cnt))
	80	return CMD_RET_USAGE;
	81
	82	printf("Sensing bank %u:\n", bank);
	83	for (i = 0; i < cnt; i++, word++) {
	84	if (!(i % 4))
	85	printf("\nWord 0x%.8x:", word);
	86
	87	ret = fuse_sense(bank, word, &val);
	88	if (ret)
	89	goto err;
	90
	91	printf(" %.8x", val);
	92	}
	93	putc('\n');
	94	} else if (!strcmp(op, "prog")) {
	95	if (argc < 3)
	96	return CMD_RET_USAGE;
	97
	98	for (i = 2; i < argc; i++, word++) {
	99	if (strtou32(argv[i], 16, &val))
	100	return CMD_RET_USAGE;
	101
	102	printf("Programming bank %u word 0x%.8x to 0x%.8x...\n",
	103	bank, word, val);
	104	if (!confirmed && !confirm_prog())
	105	return CMD_RET_FAILURE;
	106	ret = fuse_prog(bank, word, val);
	107	if (ret)
	108	goto err;
109	}
110	} else if (!strcmp(op, "override")) {
111	if (argc < 3)
112	return CMD_RET_USAGE;
113
114	for (i = 2; i < argc; i++, word++) {
115	if (strtou32(argv[i], 16, &val))
116	return CMD_RET_USAGE;
117
118	printf("Overriding bank %u word 0x%.8x with "
119	"0x%.8x...\n", bank, word, val);
120	ret = fuse_override(bank, word, val);
121	if (ret)
122	goto err;
123	}
124	} else {
125	return CMD_RET_USAGE;
126	}
127
128	return 0;
129
130	err:
131	puts("ERROR\n");
814b6614	132	return CMD_RET_FAILURE;
ccca7dfd BT	133	}
	134
	135	U_BOOT_CMD(
	136	fuse, CONFIG_SYS_MAXARGS, 0, do_fuse,
	137	"Fuse sub-system",
	138	"read <bank> <word> [<cnt>] - read 1 or 'cnt' fuse words,\n"
	139	" starting at 'word'\n"
	140	"fuse sense <bank> <word> [<cnt>] - sense 1 or 'cnt' fuse words,\n"
	141	" starting at 'word'\n"
	142	"fuse prog [-y] <bank> <word> <hexval> [<hexval>...] - program 1 or\n"
	143	" several fuse words, starting at 'word' (PERMANENT)\n"
	144	"fuse override <bank> <word> <hexval> [<hexval>...] - override 1 or\n"
	145	" several fuse words, starting at 'word'"
	146	);