mirror of
https://github.com/u-boot/u-boot.git
synced 2024-11-24 20:54:24 +08:00
814b661448
Fuse drivers, like the mxs_ocotp.c, may return negative error codes but the commands are only allowed to return CMD_RET_* enum values to the shell, otherwise the following error appears: "exit not allowed from main input shell." Signed-off-by: Hector Palacios <hector.palacios@digi.com> Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
146 lines
3.3 KiB
C
146 lines
3.3 KiB
C
/*
|
|
* (C) Copyright 2009-2013 ADVANSEE
|
|
* Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
|
|
*
|
|
* Based on the mpc512x iim code:
|
|
* Copyright 2008 Silicon Turnkey Express, Inc.
|
|
* Martha Marx <mmarx@silicontkx.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <fuse.h>
|
|
#include <asm/errno.h>
|
|
|
|
static int strtou32(const char *str, unsigned int base, u32 *result)
|
|
{
|
|
char *ep;
|
|
|
|
*result = simple_strtoul(str, &ep, base);
|
|
if (ep == str || *ep != '\0')
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int confirm_prog(void)
|
|
{
|
|
puts("Warning: Programming fuses is an irreversible operation!\n"
|
|
" This may brick your system.\n"
|
|
" Use this command only if you are sure of "
|
|
"what you are doing!\n"
|
|
"\nReally perform this fuse programming? <y/N>\n");
|
|
|
|
if (confirm_yesno())
|
|
return 1;
|
|
|
|
puts("Fuse programming aborted\n");
|
|
return 0;
|
|
}
|
|
|
|
static int do_fuse(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
|
|
{
|
|
const char *op = argc >= 2 ? argv[1] : NULL;
|
|
int confirmed = argc >= 3 && !strcmp(argv[2], "-y");
|
|
u32 bank, word, cnt, val;
|
|
int ret, i;
|
|
|
|
argc -= 2 + confirmed;
|
|
argv += 2 + confirmed;
|
|
|
|
if (argc < 2 || strtou32(argv[0], 0, &bank) ||
|
|
strtou32(argv[1], 0, &word))
|
|
return CMD_RET_USAGE;
|
|
|
|
if (!strcmp(op, "read")) {
|
|
if (argc == 2)
|
|
cnt = 1;
|
|
else if (argc != 3 || strtou32(argv[2], 0, &cnt))
|
|
return CMD_RET_USAGE;
|
|
|
|
printf("Reading bank %u:\n", bank);
|
|
for (i = 0; i < cnt; i++, word++) {
|
|
if (!(i % 4))
|
|
printf("\nWord 0x%.8x:", word);
|
|
|
|
ret = fuse_read(bank, word, &val);
|
|
if (ret)
|
|
goto err;
|
|
|
|
printf(" %.8x", val);
|
|
}
|
|
putc('\n');
|
|
} else if (!strcmp(op, "sense")) {
|
|
if (argc == 2)
|
|
cnt = 1;
|
|
else if (argc != 3 || strtou32(argv[2], 0, &cnt))
|
|
return CMD_RET_USAGE;
|
|
|
|
printf("Sensing bank %u:\n", bank);
|
|
for (i = 0; i < cnt; i++, word++) {
|
|
if (!(i % 4))
|
|
printf("\nWord 0x%.8x:", word);
|
|
|
|
ret = fuse_sense(bank, word, &val);
|
|
if (ret)
|
|
goto err;
|
|
|
|
printf(" %.8x", val);
|
|
}
|
|
putc('\n');
|
|
} else if (!strcmp(op, "prog")) {
|
|
if (argc < 3)
|
|
return CMD_RET_USAGE;
|
|
|
|
for (i = 2; i < argc; i++, word++) {
|
|
if (strtou32(argv[i], 16, &val))
|
|
return CMD_RET_USAGE;
|
|
|
|
printf("Programming bank %u word 0x%.8x to 0x%.8x...\n",
|
|
bank, word, val);
|
|
if (!confirmed && !confirm_prog())
|
|
return CMD_RET_FAILURE;
|
|
ret = fuse_prog(bank, word, val);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
} else if (!strcmp(op, "override")) {
|
|
if (argc < 3)
|
|
return CMD_RET_USAGE;
|
|
|
|
for (i = 2; i < argc; i++, word++) {
|
|
if (strtou32(argv[i], 16, &val))
|
|
return CMD_RET_USAGE;
|
|
|
|
printf("Overriding bank %u word 0x%.8x with "
|
|
"0x%.8x...\n", bank, word, val);
|
|
ret = fuse_override(bank, word, val);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
} else {
|
|
return CMD_RET_USAGE;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
puts("ERROR\n");
|
|
return CMD_RET_FAILURE;
|
|
}
|
|
|
|
U_BOOT_CMD(
|
|
fuse, CONFIG_SYS_MAXARGS, 0, do_fuse,
|
|
"Fuse sub-system",
|
|
"read <bank> <word> [<cnt>] - read 1 or 'cnt' fuse words,\n"
|
|
" starting at 'word'\n"
|
|
"fuse sense <bank> <word> [<cnt>] - sense 1 or 'cnt' fuse words,\n"
|
|
" starting at 'word'\n"
|
|
"fuse prog [-y] <bank> <word> <hexval> [<hexval>...] - program 1 or\n"
|
|
" several fuse words, starting at 'word' (PERMANENT)\n"
|
|
"fuse override <bank> <word> <hexval> [<hexval>...] - override 1 or\n"
|
|
" several fuse words, starting at 'word'"
|
|
);
|