1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (C) 2014-2016, Toradex AG
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun /*
8*4882a593Smuzhiyun * Helpers for i.MX OTP fusing during module production
9*4882a593Smuzhiyun */
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include <common.h>
12*4882a593Smuzhiyun #ifndef CONFIG_SPL_BUILD
13*4882a593Smuzhiyun #include <console.h>
14*4882a593Smuzhiyun #include <fuse.h>
15*4882a593Smuzhiyun
mfgr_fuse(void)16*4882a593Smuzhiyun static int mfgr_fuse(void)
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun unsigned val, val6;
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun fuse_sense(0, 5, &val);
21*4882a593Smuzhiyun printf("Fuse 0, 5: %8x\n", val);
22*4882a593Smuzhiyun fuse_sense(0, 6, &val6);
23*4882a593Smuzhiyun printf("Fuse 0, 6: %8x\n", val6);
24*4882a593Smuzhiyun fuse_sense(4, 3, &val);
25*4882a593Smuzhiyun printf("Fuse 4, 3: %8x\n", val);
26*4882a593Smuzhiyun fuse_sense(4, 2, &val);
27*4882a593Smuzhiyun printf("Fuse 4, 2: %8x\n", val);
28*4882a593Smuzhiyun if (val6 & 0x10) {
29*4882a593Smuzhiyun puts("BT_FUSE_SEL already fused, will do nothing\n");
30*4882a593Smuzhiyun return CMD_RET_FAILURE;
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun /* boot cfg */
33*4882a593Smuzhiyun fuse_prog(0, 5, 0x00005072);
34*4882a593Smuzhiyun /* BT_FUSE_SEL */
35*4882a593Smuzhiyun fuse_prog(0, 6, 0x00000010);
36*4882a593Smuzhiyun return CMD_RET_SUCCESS;
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
do_mfgr_fuse(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])39*4882a593Smuzhiyun int do_mfgr_fuse(cmd_tbl_t *cmdtp, int flag, int argc,
40*4882a593Smuzhiyun char * const argv[])
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun int ret;
43*4882a593Smuzhiyun puts("Fusing...\n");
44*4882a593Smuzhiyun ret = mfgr_fuse();
45*4882a593Smuzhiyun if (ret == CMD_RET_SUCCESS)
46*4882a593Smuzhiyun puts("done.\n");
47*4882a593Smuzhiyun else
48*4882a593Smuzhiyun puts("failed.\n");
49*4882a593Smuzhiyun return ret;
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun
do_updt_fuse(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])52*4882a593Smuzhiyun int do_updt_fuse(cmd_tbl_t *cmdtp, int flag, int argc,
53*4882a593Smuzhiyun char * const argv[])
54*4882a593Smuzhiyun {
55*4882a593Smuzhiyun unsigned val;
56*4882a593Smuzhiyun int ret;
57*4882a593Smuzhiyun int confirmed = argc >= 1 && !strcmp(argv[1], "-y");
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun /* can be used in scripts for command availability check */
60*4882a593Smuzhiyun if (argc >= 1 && !strcmp(argv[1], "-n"))
61*4882a593Smuzhiyun return CMD_RET_SUCCESS;
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun /* boot cfg */
64*4882a593Smuzhiyun fuse_sense(0, 5, &val);
65*4882a593Smuzhiyun printf("Fuse 0, 5: %8x\n", val);
66*4882a593Smuzhiyun if (val & 0x10) {
67*4882a593Smuzhiyun puts("Fast boot mode already fused, no need to fuse\n");
68*4882a593Smuzhiyun return CMD_RET_SUCCESS;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun if (!confirmed) {
71*4882a593Smuzhiyun puts("Warning: Programming fuses is an irreversible operation!\n"
72*4882a593Smuzhiyun " Updating to fast boot mode prevents easy\n"
73*4882a593Smuzhiyun " downgrading to previous BSP versions.\n"
74*4882a593Smuzhiyun "\nReally perform this fuse programming? <y/N>\n");
75*4882a593Smuzhiyun if (!confirm_yesno())
76*4882a593Smuzhiyun return CMD_RET_FAILURE;
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun puts("Fusing fast boot mode...\n");
79*4882a593Smuzhiyun ret = fuse_prog(0, 5, 0x00005072);
80*4882a593Smuzhiyun if (ret == CMD_RET_SUCCESS)
81*4882a593Smuzhiyun puts("done.\n");
82*4882a593Smuzhiyun else
83*4882a593Smuzhiyun puts("failed.\n");
84*4882a593Smuzhiyun return ret;
85*4882a593Smuzhiyun }
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun U_BOOT_CMD(
88*4882a593Smuzhiyun mfgr_fuse, 1, 0, do_mfgr_fuse,
89*4882a593Smuzhiyun "OTP fusing during module production",
90*4882a593Smuzhiyun ""
91*4882a593Smuzhiyun );
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun U_BOOT_CMD(
94*4882a593Smuzhiyun updt_fuse, 2, 0, do_updt_fuse,
95*4882a593Smuzhiyun "OTP fusing during module update",
96*4882a593Smuzhiyun "updt_fuse [-n] [-y] - boot cfg fast boot mode fusing"
97*4882a593Smuzhiyun );
98*4882a593Smuzhiyun #endif /* CONFIG_SPL_BUILD */
99