1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2009-2013 ADVANSEE
4 * Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
6 * Based on the mpc512x iim code:
7 * Copyright 2008 Silicon Turnkey Express, Inc.
8 * Martha Marx <mmarx@silicontkx.com>
15 #include <linux/errno.h>
17 static int strtou32(const char *str
, unsigned int base
, u32
*result
)
21 *result
= simple_strtoul(str
, &ep
, base
);
22 if (ep
== str
|| *ep
!= '\0')
28 static int confirm_prog(void)
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");
39 puts("Fuse programming aborted\n");
43 static int do_fuse(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *const argv
[])
45 const char *op
= argc
>= 2 ? argv
[1] : NULL
;
46 int confirmed
= argc
>= 3 && !strcmp(argv
[2], "-y");
47 u32 bank
, word
, cnt
, val
;
50 argc
-= 2 + confirmed
;
51 argv
+= 2 + confirmed
;
53 if (argc
< 2 || strtou32(argv
[0], 0, &bank
) ||
54 strtou32(argv
[1], 0, &word
))
57 if (!strcmp(op
, "read")) {
60 else if (argc
!= 3 || strtou32(argv
[2], 0, &cnt
))
63 printf("Reading bank %u:\n", bank
);
64 for (i
= 0; i
< cnt
; i
++, word
++) {
66 printf("\nWord 0x%.8x:", word
);
68 ret
= fuse_read(bank
, word
, &val
);
75 } else if (!strcmp(op
, "sense")) {
78 else if (argc
!= 3 || strtou32(argv
[2], 0, &cnt
))
81 printf("Sensing bank %u:\n", bank
);
82 for (i
= 0; i
< cnt
; i
++, word
++) {
84 printf("\nWord 0x%.8x:", word
);
86 ret
= fuse_sense(bank
, word
, &val
);
93 } else if (!strcmp(op
, "prog")) {
97 for (i
= 2; i
< argc
; i
++, word
++) {
98 if (strtou32(argv
[i
], 16, &val
))
101 printf("Programming bank %u word 0x%.8x to 0x%.8x...\n",
103 if (!confirmed
&& !confirm_prog())
104 return CMD_RET_FAILURE
;
105 ret
= fuse_prog(bank
, word
, val
);
109 } else if (!strcmp(op
, "override")) {
111 return CMD_RET_USAGE
;
113 for (i
= 2; i
< argc
; i
++, word
++) {
114 if (strtou32(argv
[i
], 16, &val
))
115 return CMD_RET_USAGE
;
117 printf("Overriding bank %u word 0x%.8x with "
118 "0x%.8x...\n", bank
, word
, val
);
119 ret
= fuse_override(bank
, word
, val
);
124 return CMD_RET_USAGE
;
131 return CMD_RET_FAILURE
;
135 fuse
, CONFIG_SYS_MAXARGS
, 0, do_fuse
,
137 "read <bank> <word> [<cnt>] - read 1 or 'cnt' fuse words,\n"
138 " starting at 'word'\n"
139 "fuse sense <bank> <word> [<cnt>] - sense 1 or 'cnt' fuse words,\n"
140 " starting at 'word'\n"
141 "fuse prog [-y] <bank> <word> <hexval> [<hexval>...] - program 1 or\n"
142 " several fuse words, starting at 'word' (PERMANENT)\n"
143 "fuse override <bank> <word> <hexval> [<hexval>...] - override 1 or\n"
144 " several fuse words, starting at 'word'"