2 * (C) Copyright 2009-2013 ADVANSEE
3 * Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
5 * Based on the mpc512x iim code:
6 * Copyright 2008 Silicon Turnkey Express, Inc.
7 * Martha Marx <mmarx@silicontkx.com>
9 * SPDX-License-Identifier: GPL-2.0+
16 #include <linux/errno.h>
18 static int strtou32(const char *str, unsigned int base, u32 *result)
22 *result = simple_strtoul(str, &ep, base);
23 if (ep == str || *ep != '\0')
29 static int confirm_prog(void)
31 puts("Warning: Programming fuses is an irreversible operation!\n"
32 " This may brick your system.\n"
33 " Use this command only if you are sure of "
34 "what you are doing!\n"
35 "\nReally perform this fuse programming? <y/N>\n");
40 puts("Fuse programming aborted\n");
44 static int do_fuse(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
46 const char *op = argc >= 2 ? argv[1] : NULL;
47 int confirmed = argc >= 3 && !strcmp(argv[2], "-y");
48 u32 bank, word, cnt, val;
51 argc -= 2 + confirmed;
52 argv += 2 + confirmed;
54 if (argc < 2 || strtou32(argv[0], 0, &bank) ||
55 strtou32(argv[1], 0, &word))
58 if (!strcmp(op, "read")) {
61 else if (argc != 3 || strtou32(argv[2], 0, &cnt))
64 printf("Reading bank %u:\n", bank);
65 for (i = 0; i < cnt; i++, word++) {
67 printf("\nWord 0x%.8x:", word);
69 ret = fuse_read(bank, word, &val);
76 } else if (!strcmp(op, "sense")) {
79 else if (argc != 3 || strtou32(argv[2], 0, &cnt))
82 printf("Sensing bank %u:\n", bank);
83 for (i = 0; i < cnt; i++, word++) {
85 printf("\nWord 0x%.8x:", word);
87 ret = fuse_sense(bank, word, &val);
94 } else if (!strcmp(op, "prog")) {
98 for (i = 2; i < argc; i++, word++) {
99 if (strtou32(argv[i], 16, &val))
100 return CMD_RET_USAGE;
102 printf("Programming bank %u word 0x%.8x to 0x%.8x...\n",
104 if (!confirmed && !confirm_prog())
105 return CMD_RET_FAILURE;
106 ret = fuse_prog(bank, word, val);
110 } else if (!strcmp(op, "override")) {
112 return CMD_RET_USAGE;
114 for (i = 2; i < argc; i++, word++) {
115 if (strtou32(argv[i], 16, &val))
116 return CMD_RET_USAGE;
118 printf("Overriding bank %u word 0x%.8x with "
119 "0x%.8x...\n", bank, word, val);
120 ret = fuse_override(bank, word, val);
125 return CMD_RET_USAGE;
132 return CMD_RET_FAILURE;
136 fuse, CONFIG_SYS_MAXARGS, 0, do_fuse,
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'"