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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 | * | |
9 | * See file CREDITS for list of people who contributed to this | |
10 | * project. | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License as | |
14 | * published by the Free Software Foundation; either version 2 of | |
15 | * the License, or (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
25 | * MA 02111-1307 USA | |
26 | */ | |
27 | ||
28 | #include <common.h> | |
29 | #include <command.h> | |
30 | #include <fuse.h> | |
31 | #include <asm/errno.h> | |
32 | ||
33 | static int strtou32(const char *str, unsigned int base, u32 *result) | |
34 | { | |
35 | char *ep; | |
36 | ||
37 | *result = simple_strtoul(str, &ep, base); | |
38 | if (ep == str || *ep != '\0') | |
39 | return -EINVAL; | |
40 | ||
41 | return 0; | |
42 | } | |
43 | ||
44 | static int confirm_prog(void) | |
45 | { | |
46 | puts("Warning: Programming fuses is an irreversible operation!\n" | |
47 | " This may brick your system.\n" | |
48 | " Use this command only if you are sure of " | |
49 | "what you are doing!\n" | |
50 | "\nReally perform this fuse programming? <y/N>\n"); | |
51 | ||
52 | if (getc() == 'y') { | |
53 | int c; | |
54 | ||
55 | putc('y'); | |
56 | c = getc(); | |
57 | putc('\n'); | |
58 | if (c == '\r') | |
59 | return 1; | |
60 | } | |
61 | ||
62 | puts("Fuse programming aborted\n"); | |
63 | return 0; | |
64 | } | |
65 | ||
66 | static int do_fuse(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) | |
67 | { | |
68 | const char *op = argc >= 2 ? argv[1] : NULL; | |
69 | int confirmed = argc >= 3 && !strcmp(argv[2], "-y"); | |
70 | u32 bank, word, cnt, val; | |
71 | int ret, i; | |
72 | ||
73 | argc -= 2 + confirmed; | |
74 | argv += 2 + confirmed; | |
75 | ||
76 | if (argc < 2 || strtou32(argv[0], 0, &bank) || | |
77 | strtou32(argv[1], 0, &word)) | |
78 | return CMD_RET_USAGE; | |
79 | ||
80 | if (!strcmp(op, "read")) { | |
81 | if (argc == 2) | |
82 | cnt = 1; | |
83 | else if (argc != 3 || strtou32(argv[2], 0, &cnt)) | |
84 | return CMD_RET_USAGE; | |
85 | ||
86 | printf("Reading bank %u:\n", bank); | |
87 | for (i = 0; i < cnt; i++, word++) { | |
88 | if (!(i % 4)) | |
89 | printf("\nWord 0x%.8x:", word); | |
90 | ||
91 | ret = fuse_read(bank, word, &val); | |
92 | if (ret) | |
93 | goto err; | |
94 | ||
95 | printf(" %.8x", val); | |
96 | } | |
97 | putc('\n'); | |
98 | } else if (!strcmp(op, "sense")) { | |
99 | if (argc == 2) | |
100 | cnt = 1; | |
101 | else if (argc != 3 || strtou32(argv[2], 0, &cnt)) | |
102 | return CMD_RET_USAGE; | |
103 | ||
104 | printf("Sensing bank %u:\n", bank); | |
105 | for (i = 0; i < cnt; i++, word++) { | |
106 | if (!(i % 4)) | |
107 | printf("\nWord 0x%.8x:", word); | |
108 | ||
109 | ret = fuse_sense(bank, word, &val); | |
110 | if (ret) | |
111 | goto err; | |
112 | ||
113 | printf(" %.8x", val); | |
114 | } | |
115 | putc('\n'); | |
116 | } else if (!strcmp(op, "prog")) { | |
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("Programming bank %u word 0x%.8x to 0x%.8x...\n", | |
125 | bank, word, val); | |
126 | if (!confirmed && !confirm_prog()) | |
127 | return CMD_RET_FAILURE; | |
128 | ret = fuse_prog(bank, word, val); | |
129 | if (ret) | |
130 | goto err; | |
131 | } | |
132 | } else if (!strcmp(op, "override")) { | |
133 | if (argc < 3) | |
134 | return CMD_RET_USAGE; | |
135 | ||
136 | for (i = 2; i < argc; i++, word++) { | |
137 | if (strtou32(argv[i], 16, &val)) | |
138 | return CMD_RET_USAGE; | |
139 | ||
140 | printf("Overriding bank %u word 0x%.8x with " | |
141 | "0x%.8x...\n", bank, word, val); | |
142 | ret = fuse_override(bank, word, val); | |
143 | if (ret) | |
144 | goto err; | |
145 | } | |
146 | } else { | |
147 | return CMD_RET_USAGE; | |
148 | } | |
149 | ||
150 | return 0; | |
151 | ||
152 | err: | |
153 | puts("ERROR\n"); | |
154 | return ret; | |
155 | } | |
156 | ||
157 | U_BOOT_CMD( | |
158 | fuse, CONFIG_SYS_MAXARGS, 0, do_fuse, | |
159 | "Fuse sub-system", | |
160 | "read <bank> <word> [<cnt>] - read 1 or 'cnt' fuse words,\n" | |
161 | " starting at 'word'\n" | |
162 | "fuse sense <bank> <word> [<cnt>] - sense 1 or 'cnt' fuse words,\n" | |
163 | " starting at 'word'\n" | |
164 | "fuse prog [-y] <bank> <word> <hexval> [<hexval>...] - program 1 or\n" | |
165 | " several fuse words, starting at 'word' (PERMANENT)\n" | |
166 | "fuse override <bank> <word> <hexval> [<hexval>...] - override 1 or\n" | |
167 | " several fuse words, starting at 'word'" | |
168 | ); |