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 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 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 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