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ccca7dfd BT |
1 | /* |
2 | * (C) Copyright 2009-2013 ADVANSEE | |
3 | * Benoît Thébaudeau <benoit.thebaudeau@advansee.com> | |
4 | * | |
5 | * Based on the mpc512x iim code: | |
6 | * Copyright 2008 Silicon Turnkey Express, Inc. | |
7 | * Martha Marx <mmarx@silicontkx.com> | |
8 | * | |
1a459660 | 9 | * SPDX-License-Identifier: GPL-2.0+ |
ccca7dfd BT |
10 | */ |
11 | ||
12 | #include <common.h> | |
13 | #include <command.h> | |
14 | #include <fuse.h> | |
15 | #include <asm/errno.h> | |
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 | ||
36 | if (getc() == 'y') { | |
37 | int c; | |
38 | ||
39 | putc('y'); | |
40 | c = getc(); | |
41 | putc('\n'); | |
42 | if (c == '\r') | |
43 | return 1; | |
44 | } | |
45 | ||
46 | puts("Fuse programming aborted\n"); | |
47 | return 0; | |
48 | } | |
49 | ||
50 | static int do_fuse(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) | |
51 | { | |
52 | const char *op = argc >= 2 ? argv[1] : NULL; | |
53 | int confirmed = argc >= 3 && !strcmp(argv[2], "-y"); | |
54 | u32 bank, word, cnt, val; | |
55 | int ret, i; | |
56 | ||
57 | argc -= 2 + confirmed; | |
58 | argv += 2 + confirmed; | |
59 | ||
60 | if (argc < 2 || strtou32(argv[0], 0, &bank) || | |
61 | strtou32(argv[1], 0, &word)) | |
62 | return CMD_RET_USAGE; | |
63 | ||
64 | if (!strcmp(op, "read")) { | |
65 | if (argc == 2) | |
66 | cnt = 1; | |
67 | else if (argc != 3 || strtou32(argv[2], 0, &cnt)) | |
68 | return CMD_RET_USAGE; | |
69 | ||
70 | printf("Reading bank %u:\n", bank); | |
71 | for (i = 0; i < cnt; i++, word++) { | |
72 | if (!(i % 4)) | |
73 | printf("\nWord 0x%.8x:", word); | |
74 | ||
75 | ret = fuse_read(bank, word, &val); | |
76 | if (ret) | |
77 | goto err; | |
78 | ||
79 | printf(" %.8x", val); | |
80 | } | |
81 | putc('\n'); | |
82 | } else if (!strcmp(op, "sense")) { | |
83 | if (argc == 2) | |
84 | cnt = 1; | |
85 | else if (argc != 3 || strtou32(argv[2], 0, &cnt)) | |
86 | return CMD_RET_USAGE; | |
87 | ||
88 | printf("Sensing bank %u:\n", bank); | |
89 | for (i = 0; i < cnt; i++, word++) { | |
90 | if (!(i % 4)) | |
91 | printf("\nWord 0x%.8x:", word); | |
92 | ||
93 | ret = fuse_sense(bank, word, &val); | |
94 | if (ret) | |
95 | goto err; | |
96 | ||
97 | printf(" %.8x", val); | |
98 | } | |
99 | putc('\n'); | |
100 | } else if (!strcmp(op, "prog")) { | |
101 | if (argc < 3) | |
102 | return CMD_RET_USAGE; | |
103 | ||
104 | for (i = 2; i < argc; i++, word++) { | |
105 | if (strtou32(argv[i], 16, &val)) | |
106 | return CMD_RET_USAGE; | |
107 | ||
108 | printf("Programming bank %u word 0x%.8x to 0x%.8x...\n", | |
109 | bank, word, val); | |
110 | if (!confirmed && !confirm_prog()) | |
111 | return CMD_RET_FAILURE; | |
112 | ret = fuse_prog(bank, word, val); | |
113 | if (ret) | |
114 | goto err; | |
115 | } | |
116 | } else if (!strcmp(op, "override")) { | |
117 | if (argc < 3) | |
118 | return CMD_RET_USAGE; | |
119 | ||
120 | for (i = 2; i < argc; i++, word++) { | |
121 | if (strtou32(argv[i], 16, &val)) | |
122 | return CMD_RET_USAGE; | |
123 | ||
124 | printf("Overriding bank %u word 0x%.8x with " | |
125 | "0x%.8x...\n", bank, word, val); | |
126 | ret = fuse_override(bank, word, val); | |
127 | if (ret) | |
128 | goto err; | |
129 | } | |
130 | } else { | |
131 | return CMD_RET_USAGE; | |
132 | } | |
133 | ||
134 | return 0; | |
135 | ||
136 | err: | |
137 | puts("ERROR\n"); | |
138 | return ret; | |
139 | } | |
140 | ||
141 | U_BOOT_CMD( | |
142 | fuse, CONFIG_SYS_MAXARGS, 0, do_fuse, | |
143 | "Fuse sub-system", | |
144 | "read <bank> <word> [<cnt>] - read 1 or 'cnt' fuse words,\n" | |
145 | " starting at 'word'\n" | |
146 | "fuse sense <bank> <word> [<cnt>] - sense 1 or 'cnt' fuse words,\n" | |
147 | " starting at 'word'\n" | |
148 | "fuse prog [-y] <bank> <word> <hexval> [<hexval>...] - program 1 or\n" | |
149 | " several fuse words, starting at 'word' (PERMANENT)\n" | |
150 | "fuse override <bank> <word> <hexval> [<hexval>...] - override 1 or\n" | |
151 | " several fuse words, starting at 'word'" | |
152 | ); |