| Max Krummenacher | eeb16b2 | 2016-11-30 19:43:09 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014-2016, Toradex AG |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0+ |
| 5 | */ |
| 6 | |
| 7 | /* |
| 8 | * Helpers for i.MX OTP fusing during module production |
| 9 | */ |
| 10 | |
| 11 | #include <common.h> |
| 12 | #ifndef CONFIG_SPL_BUILD |
| 13 | #include <console.h> |
| 14 | #include <fuse.h> |
| 15 | |
| 16 | static int mfgr_fuse(void) |
| 17 | { |
| 18 | unsigned val, val6; |
| 19 | |
| 20 | fuse_sense(0, 5, &val); |
| 21 | printf("Fuse 0, 5: %8x\n", val); |
| 22 | fuse_sense(0, 6, &val6); |
| 23 | printf("Fuse 0, 6: %8x\n", val6); |
| 24 | fuse_sense(4, 3, &val); |
| 25 | printf("Fuse 4, 3: %8x\n", val); |
| 26 | fuse_sense(4, 2, &val); |
| 27 | printf("Fuse 4, 2: %8x\n", val); |
| 28 | if (val6 & 0x10) { |
| 29 | puts("BT_FUSE_SEL already fused, will do nothing\n"); |
| 30 | return CMD_RET_FAILURE; |
| 31 | } |
| 32 | /* boot cfg */ |
| 33 | fuse_prog(0, 5, 0x00005072); |
| 34 | /* BT_FUSE_SEL */ |
| 35 | fuse_prog(0, 6, 0x00000010); |
| 36 | return CMD_RET_SUCCESS; |
| 37 | } |
| 38 | |
| 39 | int do_mfgr_fuse(cmd_tbl_t *cmdtp, int flag, int argc, |
| 40 | char * const argv[]) |
| 41 | { |
| 42 | int ret; |
| 43 | puts("Fusing...\n"); |
| 44 | ret = mfgr_fuse(); |
| 45 | if (ret == CMD_RET_SUCCESS) |
| 46 | puts("done.\n"); |
| 47 | else |
| 48 | puts("failed.\n"); |
| 49 | return ret; |
| 50 | } |
| 51 | |
| 52 | int do_updt_fuse(cmd_tbl_t *cmdtp, int flag, int argc, |
| 53 | char * const argv[]) |
| 54 | { |
| 55 | unsigned val; |
| 56 | int ret; |
| 57 | int confirmed = argc >= 1 && !strcmp(argv[1], "-y"); |
| 58 | |
| 59 | /* can be used in scripts for command availability check */ |
| 60 | if (argc >= 1 && !strcmp(argv[1], "-n")) |
| 61 | return CMD_RET_SUCCESS; |
| 62 | |
| 63 | /* boot cfg */ |
| 64 | fuse_sense(0, 5, &val); |
| 65 | printf("Fuse 0, 5: %8x\n", val); |
| 66 | if (val & 0x10) { |
| 67 | puts("Fast boot mode already fused, no need to fuse\n"); |
| 68 | return CMD_RET_SUCCESS; |
| 69 | } |
| 70 | if (!confirmed) { |
| 71 | puts("Warning: Programming fuses is an irreversible operation!\n" |
| 72 | " Updating to fast boot mode prevents easy\n" |
| 73 | " downgrading to previous BSP versions.\n" |
| 74 | "\nReally perform this fuse programming? <y/N>\n"); |
| 75 | if (!confirm_yesno()) |
| 76 | return CMD_RET_FAILURE; |
| 77 | } |
| 78 | puts("Fusing fast boot mode...\n"); |
| 79 | ret = fuse_prog(0, 5, 0x00005072); |
| 80 | if (ret == CMD_RET_SUCCESS) |
| 81 | puts("done.\n"); |
| 82 | else |
| 83 | puts("failed.\n"); |
| 84 | return ret; |
| 85 | } |
| 86 | |
| 87 | U_BOOT_CMD( |
| 88 | mfgr_fuse, 1, 0, do_mfgr_fuse, |
| 89 | "OTP fusing during module production", |
| 90 | "" |
| 91 | ); |
| 92 | |
| 93 | U_BOOT_CMD( |
| 94 | updt_fuse, 2, 0, do_updt_fuse, |
| 95 | "OTP fusing during module update", |
| 96 | "updt_fuse [-n] [-y] - boot cfg fast boot mode fusing" |
| 97 | ); |
| 98 | #endif /* CONFIG_SPL_BUILD */ |