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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2014-2016, Toradex AG
- */
- /*
- * 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, 0x00005062);
- /* 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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