146 lines
3.3 KiB
C
146 lines
3.3 KiB
C
/*
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* (C) Copyright 2009-2013 ADVANSEE
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* Beno卯t Th茅baudeau <benoit.thebaudeau@advansee.com>
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*
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* Based on the mpc512x iim code:
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* Copyright 2008 Silicon Turnkey Express, Inc.
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* Martha Marx <mmarx@silicontkx.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <command.h>
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#include <fuse.h>
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#include <asm/errno.h>
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static int strtou32(const char *str, unsigned int base, u32 *result)
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{
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char *ep;
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*result = simple_strtoul(str, &ep, base);
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if (ep == str || *ep != '\0')
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return -EINVAL;
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return 0;
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}
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static int confirm_prog(void)
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{
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puts("Warning: Programming fuses is an irreversible operation!\n"
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" This may brick your system.\n"
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" Use this command only if you are sure of "
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"what you are doing!\n"
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"\nReally perform this fuse programming? <y/N>\n");
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if (confirm_yesno())
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return 1;
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puts("Fuse programming aborted\n");
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return 0;
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}
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static int do_fuse(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
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{
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const char *op = argc >= 2 ? argv[1] : NULL;
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int confirmed = argc >= 3 && !strcmp(argv[2], "-y");
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u32 bank, word, cnt, val;
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int ret, i;
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argc -= 2 + confirmed;
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argv += 2 + confirmed;
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if (argc < 2 || strtou32(argv[0], 0, &bank) ||
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strtou32(argv[1], 0, &word))
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return CMD_RET_USAGE;
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if (!strcmp(op, "read")) {
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if (argc == 2)
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cnt = 1;
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else if (argc != 3 || strtou32(argv[2], 0, &cnt))
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return CMD_RET_USAGE;
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printf("Reading bank %u:\n", bank);
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for (i = 0; i < cnt; i++, word++) {
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if (!(i % 4))
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printf("\nWord 0x%.8x:", word);
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ret = fuse_read(bank, word, &val);
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if (ret)
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goto err;
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printf(" %.8x", val);
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}
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putc('\n');
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} else if (!strcmp(op, "sense")) {
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if (argc == 2)
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cnt = 1;
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else if (argc != 3 || strtou32(argv[2], 0, &cnt))
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return CMD_RET_USAGE;
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printf("Sensing bank %u:\n", bank);
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for (i = 0; i < cnt; i++, word++) {
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if (!(i % 4))
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printf("\nWord 0x%.8x:", word);
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ret = fuse_sense(bank, word, &val);
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if (ret)
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goto err;
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printf(" %.8x", val);
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}
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putc('\n');
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} else if (!strcmp(op, "prog")) {
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if (argc < 3)
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return CMD_RET_USAGE;
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for (i = 2; i < argc; i++, word++) {
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if (strtou32(argv[i], 16, &val))
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return CMD_RET_USAGE;
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printf("Programming bank %u word 0x%.8x to 0x%.8x...\n",
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bank, word, val);
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if (!confirmed && !confirm_prog())
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return CMD_RET_FAILURE;
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ret = fuse_prog(bank, word, val);
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if (ret)
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goto err;
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}
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} else if (!strcmp(op, "override")) {
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if (argc < 3)
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return CMD_RET_USAGE;
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for (i = 2; i < argc; i++, word++) {
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if (strtou32(argv[i], 16, &val))
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return CMD_RET_USAGE;
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printf("Overriding bank %u word 0x%.8x with "
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"0x%.8x...\n", bank, word, val);
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ret = fuse_override(bank, word, val);
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if (ret)
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goto err;
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}
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} else {
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return CMD_RET_USAGE;
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}
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return 0;
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err:
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puts("ERROR\n");
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return ret;
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}
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U_BOOT_CMD(
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fuse, CONFIG_SYS_MAXARGS, 0, do_fuse,
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"Fuse sub-system",
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"read <bank> <word> [<cnt>] - read 1 or 'cnt' fuse words,\n"
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" starting at 'word'\n"
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"fuse sense <bank> <word> [<cnt>] - sense 1 or 'cnt' fuse words,\n"
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" starting at 'word'\n"
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"fuse prog [-y] <bank> <word> <hexval> [<hexval>...] - program 1 or\n"
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" several fuse words, starting at 'word' (PERMANENT)\n"
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"fuse override <bank> <word> <hexval> [<hexval>...] - override 1 or\n"
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" several fuse words, starting at 'word'"
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);
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