1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * (C) Copyright 2009-2013 ADVANSEE 4 * Beno��t Th��baudeau <benoit.thebaudeau@advansee.com> 5 * 6 * Based on the mpc512x iim code: 7 * Copyright 2008 Silicon Turnkey Express, Inc. 8 * Martha Marx <mmarx@silicontkx.com> 9 */ 10 11#include <common.h> 12#include <command.h> 13#include <console.h> 14#include <fuse.h> 15#include <mapmem.h> 16#include <linux/errno.h> 17 18static int strtou32(const char *str, unsigned int base, u32 *result) 19{ 20 char *ep; 21 22 *result = simple_strtoul(str, &ep, base); 23 if (ep == str || *ep != '\0') 24 return -EINVAL; 25 26 return 0; 27} 28 29static int confirm_prog(void) 30{ 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"); 36 37 if (confirm_yesno()) 38 return 1; 39 40 puts("Fuse programming aborted\n"); 41 return 0; 42} 43 44static int do_fuse(struct cmd_tbl *cmdtp, int flag, int argc, 45 char *const argv[]) 46{ 47 const char *op = cmd_arg1(argc, argv); 48 int confirmed = argc >= 3 && !strcmp(argv[2], "-y"); 49 u32 bank, word, cnt, val, cmp; 50 ulong addr; 51 void *buf, *start; 52 int ret, i; 53 54 argc -= 2 + confirmed; 55 argv += 2 + confirmed; 56 57 if (argc < 2 || strtou32(argv[0], 0, &bank) || 58 strtou32(argv[1], 0, &word)) 59 return CMD_RET_USAGE; 60 61 if (!strcmp(op, "read")) { 62 if (argc == 2) 63 cnt = 1; 64 else if (argc != 3 || strtou32(argv[2], 0, &cnt)) 65 return CMD_RET_USAGE; 66 67 printf("Reading bank %u:\n", bank); 68 for (i = 0; i < cnt; i++, word++) { 69 if (!(i % 4)) 70 printf("\nWord 0x%.8x:", word); 71 72 ret = fuse_read(bank, word, &val); 73 if (ret) 74 goto err; 75 76 printf(" %.8x", val); 77 } 78 putc('\n'); 79 } else if (!strcmp(op, "readm")) { 80 if (argc == 3) 81 cnt = 1; 82 else if (argc != 4 || strtou32(argv[3], 0, &cnt)) 83 return CMD_RET_USAGE; 84 85 addr = simple_strtoul(argv[2], NULL, 16); 86 87 start = map_sysmem(addr, 4); 88 buf = start; 89 90 printf("Reading bank %u len %u to 0x%lx\n", bank, cnt, addr); 91 for (i = 0; i < cnt; i++, word++) { 92 ret = fuse_read(bank, word, &val); 93 if (ret) 94 goto err; 95 96 *((u32 *)buf) = val; 97 buf += 4; 98 } 99 100 unmap_sysmem(start); 101 } else if (!strcmp(op, "cmp")) { 102 if (argc != 3 || strtou32(argv[2], 0, &cmp)) 103 return CMD_RET_USAGE; 104 105 printf("Comparing bank %u:\n", bank); 106 printf("\nWord 0x%.8x:", word); 107 printf("\nValue 0x%.8x:", cmp); 108 109 ret = fuse_read(bank, word, &val); 110 if (ret) 111 goto err; 112 113 printf("0x%.8x\n", val); 114 if (val != cmp) { 115 printf("failed\n"); 116 return CMD_RET_FAILURE; 117 } 118 printf("passed\n"); 119 } else if (!strcmp(op, "sense")) { 120 if (argc == 2) 121 cnt = 1; 122 else if (argc != 3 || strtou32(argv[2], 0, &cnt)) 123 return CMD_RET_USAGE; 124 125 printf("Sensing bank %u:\n", bank); 126 for (i = 0; i < cnt; i++, word++) { 127 if (!(i % 4)) 128 printf("\nWord 0x%.8x:", word); 129 130 ret = fuse_sense(bank, word, &val); 131 if (ret) 132 goto err; 133 134 printf(" %.8x", val); 135 } 136 putc('\n'); 137 } else if (!strcmp(op, "prog")) { 138 if (argc < 3) 139 return CMD_RET_USAGE; 140 141 for (i = 2; i < argc; i++, word++) { 142 if (strtou32(argv[i], 16, &val)) 143 return CMD_RET_USAGE; 144 145 printf("Programming bank %u word 0x%.8x to 0x%.8x...\n", 146 bank, word, val); 147 if (!confirmed && !confirm_prog()) 148 return CMD_RET_FAILURE; 149 ret = fuse_prog(bank, word, val); 150 if (ret) 151 goto err; 152 } 153 } else if (!strcmp(op, "override")) { 154 if (argc < 3) 155 return CMD_RET_USAGE; 156 157 for (i = 2; i < argc; i++, word++) { 158 if (strtou32(argv[i], 16, &val)) 159 return CMD_RET_USAGE; 160 161 printf("Overriding bank %u word 0x%.8x with " 162 "0x%.8x...\n", bank, word, val); 163 ret = fuse_override(bank, word, val); 164 if (ret) 165 goto err; 166 } 167 } else { 168 return CMD_RET_USAGE; 169 } 170 171 return 0; 172 173err: 174 puts("ERROR\n"); 175 return CMD_RET_FAILURE; 176} 177 178U_BOOT_CMD( 179 fuse, CONFIG_SYS_MAXARGS, 0, do_fuse, 180 "Fuse sub-system", 181 "read <bank> <word> [<cnt>] - read 1 or 'cnt' fuse words,\n" 182 " starting at 'word'\n" 183 "fuse cmp <bank> <word> <hexval> - compare 'hexval' to fuse\n" 184 " at 'word'\n" 185 "fuse readm <bank> <word> <addr> [<cnt>] - read 1 or 'cnt' fuse words,\n" 186 " starting at 'word' into memory at 'addr'\n" 187 "fuse sense <bank> <word> [<cnt>] - sense 1 or 'cnt' fuse words,\n" 188 " starting at 'word'\n" 189 "fuse prog [-y] <bank> <word> <hexval> [<hexval>...] - program 1 or\n" 190 " several fuse words, starting at 'word' (PERMANENT)\n" 191 "fuse override <bank> <word> <hexval> [<hexval>...] - override 1 or\n" 192 " several fuse words, starting at 'word'" 193); 194