1*a02d517bSMax Krummenacher /*
2*a02d517bSMax Krummenacher * Copyright (C) 2014-2016, Toradex AG
3*a02d517bSMax Krummenacher *
4*a02d517bSMax Krummenacher * SPDX-License-Identifier: GPL-2.0+
5*a02d517bSMax Krummenacher */
6*a02d517bSMax Krummenacher
7*a02d517bSMax Krummenacher /*
8*a02d517bSMax Krummenacher * Helpers for i.MX OTP fusing during module production
9*a02d517bSMax Krummenacher */
10*a02d517bSMax Krummenacher
11*a02d517bSMax Krummenacher #include <common.h>
12*a02d517bSMax Krummenacher #ifndef CONFIG_SPL_BUILD
13*a02d517bSMax Krummenacher #include <console.h>
14*a02d517bSMax Krummenacher #include <fuse.h>
15*a02d517bSMax Krummenacher
mfgr_fuse(void)16*a02d517bSMax Krummenacher static int mfgr_fuse(void)
17*a02d517bSMax Krummenacher {
18*a02d517bSMax Krummenacher unsigned val, val6;
19*a02d517bSMax Krummenacher
20*a02d517bSMax Krummenacher fuse_sense(0, 5, &val);
21*a02d517bSMax Krummenacher printf("Fuse 0, 5: %8x\n", val);
22*a02d517bSMax Krummenacher fuse_sense(0, 6, &val6);
23*a02d517bSMax Krummenacher printf("Fuse 0, 6: %8x\n", val6);
24*a02d517bSMax Krummenacher fuse_sense(4, 3, &val);
25*a02d517bSMax Krummenacher printf("Fuse 4, 3: %8x\n", val);
26*a02d517bSMax Krummenacher fuse_sense(4, 2, &val);
27*a02d517bSMax Krummenacher printf("Fuse 4, 2: %8x\n", val);
28*a02d517bSMax Krummenacher if (val6 & 0x10) {
29*a02d517bSMax Krummenacher puts("BT_FUSE_SEL already fused, will do nothing\n");
30*a02d517bSMax Krummenacher return CMD_RET_FAILURE;
31*a02d517bSMax Krummenacher }
32*a02d517bSMax Krummenacher /* boot cfg */
33*a02d517bSMax Krummenacher fuse_prog(0, 5, 0x00005072);
34*a02d517bSMax Krummenacher /* BT_FUSE_SEL */
35*a02d517bSMax Krummenacher fuse_prog(0, 6, 0x00000010);
36*a02d517bSMax Krummenacher return CMD_RET_SUCCESS;
37*a02d517bSMax Krummenacher }
38*a02d517bSMax Krummenacher
do_mfgr_fuse(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])39*a02d517bSMax Krummenacher int do_mfgr_fuse(cmd_tbl_t *cmdtp, int flag, int argc,
40*a02d517bSMax Krummenacher char * const argv[])
41*a02d517bSMax Krummenacher {
42*a02d517bSMax Krummenacher int ret;
43*a02d517bSMax Krummenacher puts("Fusing...\n");
44*a02d517bSMax Krummenacher ret = mfgr_fuse();
45*a02d517bSMax Krummenacher if (ret == CMD_RET_SUCCESS)
46*a02d517bSMax Krummenacher puts("done.\n");
47*a02d517bSMax Krummenacher else
48*a02d517bSMax Krummenacher puts("failed.\n");
49*a02d517bSMax Krummenacher return ret;
50*a02d517bSMax Krummenacher }
51*a02d517bSMax Krummenacher
do_updt_fuse(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])52*a02d517bSMax Krummenacher int do_updt_fuse(cmd_tbl_t *cmdtp, int flag, int argc,
53*a02d517bSMax Krummenacher char * const argv[])
54*a02d517bSMax Krummenacher {
55*a02d517bSMax Krummenacher unsigned val;
56*a02d517bSMax Krummenacher int ret;
57*a02d517bSMax Krummenacher int confirmed = argc >= 1 && !strcmp(argv[1], "-y");
58*a02d517bSMax Krummenacher
59*a02d517bSMax Krummenacher /* can be used in scripts for command availability check */
60*a02d517bSMax Krummenacher if (argc >= 1 && !strcmp(argv[1], "-n"))
61*a02d517bSMax Krummenacher return CMD_RET_SUCCESS;
62*a02d517bSMax Krummenacher
63*a02d517bSMax Krummenacher /* boot cfg */
64*a02d517bSMax Krummenacher fuse_sense(0, 5, &val);
65*a02d517bSMax Krummenacher printf("Fuse 0, 5: %8x\n", val);
66*a02d517bSMax Krummenacher if (val & 0x10) {
67*a02d517bSMax Krummenacher puts("Fast boot mode already fused, no need to fuse\n");
68*a02d517bSMax Krummenacher return CMD_RET_SUCCESS;
69*a02d517bSMax Krummenacher }
70*a02d517bSMax Krummenacher if (!confirmed) {
71*a02d517bSMax Krummenacher puts("Warning: Programming fuses is an irreversible operation!\n"
72*a02d517bSMax Krummenacher " Updating to fast boot mode prevents easy\n"
73*a02d517bSMax Krummenacher " downgrading to previous BSP versions.\n"
74*a02d517bSMax Krummenacher "\nReally perform this fuse programming? <y/N>\n");
75*a02d517bSMax Krummenacher if (!confirm_yesno())
76*a02d517bSMax Krummenacher return CMD_RET_FAILURE;
77*a02d517bSMax Krummenacher }
78*a02d517bSMax Krummenacher puts("Fusing fast boot mode...\n");
79*a02d517bSMax Krummenacher ret = fuse_prog(0, 5, 0x00005072);
80*a02d517bSMax Krummenacher if (ret == CMD_RET_SUCCESS)
81*a02d517bSMax Krummenacher puts("done.\n");
82*a02d517bSMax Krummenacher else
83*a02d517bSMax Krummenacher puts("failed.\n");
84*a02d517bSMax Krummenacher return ret;
85*a02d517bSMax Krummenacher }
86*a02d517bSMax Krummenacher
87*a02d517bSMax Krummenacher U_BOOT_CMD(
88*a02d517bSMax Krummenacher mfgr_fuse, 1, 0, do_mfgr_fuse,
89*a02d517bSMax Krummenacher "OTP fusing during module production",
90*a02d517bSMax Krummenacher ""
91*a02d517bSMax Krummenacher );
92*a02d517bSMax Krummenacher
93*a02d517bSMax Krummenacher U_BOOT_CMD(
94*a02d517bSMax Krummenacher updt_fuse, 2, 0, do_updt_fuse,
95*a02d517bSMax Krummenacher "OTP fusing during module update",
96*a02d517bSMax Krummenacher "updt_fuse [-n] [-y] - boot cfg fast boot mode fusing"
97*a02d517bSMax Krummenacher );
98*a02d517bSMax Krummenacher #endif /* CONFIG_SPL_BUILD */
99