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/*
* Copyright (C) 2014-2016, Toradex AG
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* Helpers for i.MX OTP fusing during module production
*/
#include <common.h>
#ifndef CONFIG_SPL_BUILD
#include <console.h>
#include <fuse.h>
static int mfgr_fuse(void)
{
unsigned val, val6;
fuse_sense(0, 5, &val);
printf("Fuse 0, 5: %8x\n", val);
fuse_sense(0, 6, &val6);
printf("Fuse 0, 6: %8x\n", val6);
fuse_sense(4, 3, &val);
printf("Fuse 4, 3: %8x\n", val);
fuse_sense(4, 2, &val);
printf("Fuse 4, 2: %8x\n", val);
if (val6 & 0x10) {
puts("BT_FUSE_SEL already fused, will do nothing\n");
return CMD_RET_FAILURE;
}
/* boot cfg */
fuse_prog(0, 5, 0x00005072);
/* BT_FUSE_SEL */
fuse_prog(0, 6, 0x00000010);
return CMD_RET_SUCCESS;
}
int do_mfgr_fuse(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
int ret;
puts("Fusing...\n");
ret = mfgr_fuse();
if (ret == CMD_RET_SUCCESS)
puts("done.\n");
else
puts("failed.\n");
return ret;
}
int do_updt_fuse(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
unsigned val;
int ret;
int confirmed = argc >= 1 && !strcmp(argv[1], "-y");
/* can be used in scripts for command availability check */
if (argc >= 1 && !strcmp(argv[1], "-n"))
return CMD_RET_SUCCESS;
/* boot cfg */
fuse_sense(0, 5, &val);
printf("Fuse 0, 5: %8x\n", val);
if (val & 0x10) {
puts("Fast boot mode already fused, no need to fuse\n");
return CMD_RET_SUCCESS;
}
if (!confirmed) {
puts("Warning: Programming fuses is an irreversible operation!\n"
" Updating to fast boot mode prevents easy\n"
" downgrading to previous BSP versions.\n"
"\nReally perform this fuse programming? <y/N>\n");
if (!confirm_yesno())
return CMD_RET_FAILURE;
}
puts("Fusing fast boot mode...\n");
ret = fuse_prog(0, 5, 0x00005072);
if (ret == CMD_RET_SUCCESS)
puts("done.\n");
else
puts("failed.\n");
return ret;
}
U_BOOT_CMD(
mfgr_fuse, 1, 0, do_mfgr_fuse,
"OTP fusing during module production",
""
);
U_BOOT_CMD(
updt_fuse, 2, 0, do_updt_fuse,
"OTP fusing during module update",
"updt_fuse [-n] [-y] - boot cfg fast boot mode fusing"
);
#endif /* CONFIG_SPL_BUILD */
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