1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
3 * Copyright (C) 2019, STMicroelectronics - All Rights Reserved
5 * the st command stboard supports the STMicroelectronics board identification
8 * The ST product codification have several element
9 * - "Commercial Product Name" (CPN): type of product board (DKX, EVX)
10 * associated to the board ID "MBxxxx"
11 * - "Finished Good" or "Finish Good" (FG):
12 * effective content of the product without chip STM32MP1xx (LCD, Wifi,…)
13 * - BOM: cost variant for same FG (for example, several provider of the same
17 * - commercial product = STM32MP157C-EV1 for board MB1263
18 * - Finished Good = EVA32MP157A1$AU1
20 * Both information are written on board and these information are also saved
22 * bit [31:16] (hex) => Board id, MBxxxx
23 * bit [15:12] (dec) => Variant CPN (1....15)
24 * bit [11:8] (dec) => Revision board (index with A = 1, Z = 26)
25 * bit [7:4] (dec) => Variant FG : finished good index
26 * bit [3:0] (dec) => BOM (01, .... 255)
28 * and displayed with the format:
29 * Board: MB<Board> Var<VarCPN>.<VarFG> Rev.<Revision>-<BOM>
32 #ifndef CONFIG_SPL_BUILD
36 #include <dm/device.h>
37 #include <dm/uclass.h>
39 static bool check_stboard(u16 board)
42 /* list of supported ST boards */
43 const u16 st_board_id[] = {
52 for (i = 0; i < ARRAY_SIZE(st_board_id); i++)
53 if (board == st_board_id[i])
59 static void display_stboard(u32 otp)
61 /* display board indentification with OPT coding */
62 printf("Board: MB%04x Var%d.%d Rev.%c-%02d\n",
66 ((otp >> 8) & 0xF) - 1 + 'A',
70 static int do_stboard(cmd_tbl_t *cmdtp, int flag, int argc,
76 unsigned long board, var_cpn, var_fg, bom;
78 int confirmed = argc == 7 && !strcmp(argv[1], "-y");
80 argc -= 1 + confirmed;
81 argv += 1 + confirmed;
83 if (argc != 0 && argc != 5)
86 ret = uclass_get_device_by_driver(UCLASS_MISC,
87 DM_GET_DRIVER(stm32mp_bsec),
90 ret = misc_read(dev, STM32_BSEC_OTP(BSEC_OTP_BOARD),
94 puts("OTP read error");
95 return CMD_RET_FAILURE;
98 ret = misc_read(dev, STM32_BSEC_LOCK(BSEC_OTP_BOARD),
101 puts("LOCK read error");
102 return CMD_RET_FAILURE;
107 puts("Board : OTP board FREE\n");
109 display_stboard(otp);
110 printf(" OTP %d %s locked !\n", BSEC_OTP_BOARD,
111 lock == 1 ? "" : "NOT");
112 return CMD_RET_SUCCESS;
116 display_stboard(otp);
117 printf("ERROR: OTP board not FREE\n");
118 return CMD_RET_FAILURE;
121 if (strict_strtoul(argv[0], 16, &board) < 0 ||
122 board == 0 || board > 0xFFFF) {
123 printf("argument %d invalid: %s\n", 1, argv[0]);
124 return CMD_RET_USAGE;
127 if (strict_strtoul(argv[1], 10, &var_cpn) < 0 ||
128 var_cpn == 0 || var_cpn > 15) {
129 printf("argument %d invalid: %s\n", 2, argv[1]);
130 return CMD_RET_USAGE;
133 revision = argv[2][0] - 'A' + 1;
134 if (strlen(argv[2]) > 1 || revision == 0 || revision > 15) {
135 printf("argument %d invalid: %s\n", 3, argv[2]);
136 return CMD_RET_USAGE;
139 if (strict_strtoul(argv[3], 10, &var_fg) < 0 ||
141 printf("argument %d invalid: %s\n", 4, argv[3]);
142 return CMD_RET_USAGE;
145 if (strict_strtoul(argv[4], 10, &bom) < 0 ||
146 bom == 0 || bom > 15) {
147 printf("argument %d invalid: %s\n", 4, argv[3]);
148 return CMD_RET_USAGE;
151 /* st board indentification value */
152 otp = (board << 16) | (var_cpn << 12) | (revision << 8) |
154 display_stboard(otp);
155 printf("=> OTP[%d] = %08X\n", BSEC_OTP_BOARD, otp);
157 if (!check_stboard((u16)board)) {
158 printf("Unknown board MB%04x\n", (u16)board);
159 return CMD_RET_FAILURE;
162 printf("Warning: Programming BOARD in OTP is irreversible!\n");
163 printf("Really perform this OTP programming? <y/N>\n");
165 if (!confirm_yesno()) {
166 puts("BOARD programming aborted\n");
167 return CMD_RET_FAILURE;
171 ret = misc_write(dev, STM32_BSEC_OTP(BSEC_OTP_BOARD),
175 puts("BOARD programming error\n");
176 return CMD_RET_FAILURE;
179 /* write persistent lock */
181 ret = misc_write(dev, STM32_BSEC_LOCK(BSEC_OTP_BOARD),
184 puts("BOARD lock error\n");
185 return CMD_RET_FAILURE;
188 puts("BOARD programming done\n");
190 return CMD_RET_SUCCESS;
193 U_BOOT_CMD(stboard, 7, 0, do_stboard,
194 "read/write board reference in OTP",
196 " Print current board information\n"
197 "stboard [-y] <Board> <VarCPN> <Revision> <VarFG> <BOM>\n"
198 " Write board information\n"
199 " - Board: xxxx, example 1264 for MB1264\n"
200 " - VarCPN: 1...15\n"
201 " - Revision: A...O\n"