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// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
/*
* Copyright (C) 2019, STMicroelectronics - All Rights Reserved
*
* the st command stboard supports the STMicroelectronics board identification
* saved in OTP 59.
*
* The ST product codification have several element
* - "Commercial Product Name" (CPN): type of product board (DKX, EVX)
* associated to the board ID "MBxxxx"
* - "Finished Good" or "Finish Good" (FG):
* effective content of the product without chip STM32MP1xx (LCD, Wifi,…)
* - BOM: cost variant for same FG (for example, several provider of the same
* component)
*
* For example
* - commercial product = STM32MP157C-EV1 for board MB1263
* - Finished Good = EVA32MP157A1$AU1
*
* Both information are written on board and these information are also saved
* in OTP59, with:
* bit [31:16] (hex) => Board id, MBxxxx
* bit [15:12] (dec) => Variant CPN (1....15)
* bit [11:8] (dec) => Revision board (index with A = 1, Z = 26)
* bit [7:4] (dec) => Variant FG : finished good index
* bit [3:0] (dec) => BOM (01, .... 255)
*
* and displayed with the format:
* Board: MB<Board> Var<VarCPN>.<VarFG> Rev.<Revision>-<BOM>
*/
#ifndef CONFIG_SPL_BUILD
#include <common.h>
#include <console.h>
#include <misc.h>
#include <dm/device.h>
#include <dm/uclass.h>
static bool check_stboard(u16 board)
{
unsigned int i;
/* list of supported ST boards */
const u16 st_board_id[] = {
0x1272,
0x1263,
0x1264,
0x1298,
0x1341,
0x1497,
};
for (i = 0; i < ARRAY_SIZE(st_board_id); i++)
if (board == st_board_id[i])
return true;
return false;
}
static void display_stboard(u32 otp)
{
/* display board indentification with OPT coding */
printf("Board: MB%04x Var%d.%d Rev.%c-%02d\n",
otp >> 16,
(otp >> 12) & 0xF,
(otp >> 4) & 0xF,
((otp >> 8) & 0xF) - 1 + 'A',
otp & 0xF);
}
static int do_stboard(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
int ret;
u32 otp, lock;
u8 revision;
unsigned long board, var_cpn, var_fg, bom;
struct udevice *dev;
int confirmed = argc == 7 && !strcmp(argv[1], "-y");
argc -= 1 + confirmed;
argv += 1 + confirmed;
if (argc != 0 && argc != 5)
return CMD_RET_USAGE;
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_GET_DRIVER(stm32mp_bsec),
&dev);
ret = misc_read(dev, STM32_BSEC_OTP(BSEC_OTP_BOARD),
&otp, sizeof(otp));
if (ret < 0) {
puts("OTP read error");
return CMD_RET_FAILURE;
}
ret = misc_read(dev, STM32_BSEC_LOCK(BSEC_OTP_BOARD),
&lock, sizeof(lock));
if (ret < 0) {
puts("LOCK read error");
return CMD_RET_FAILURE;
}
if (argc == 0) {
if (!otp)
puts("Board : OTP board FREE\n");
else
display_stboard(otp);
printf(" OTP %d %s locked !\n", BSEC_OTP_BOARD,
lock == 1 ? "" : "NOT");
return CMD_RET_SUCCESS;
}
if (otp) {
display_stboard(otp);
printf("ERROR: OTP board not FREE\n");
return CMD_RET_FAILURE;
}
if (strict_strtoul(argv[0], 16, &board) < 0 ||
board == 0 || board > 0xFFFF) {
printf("argument %d invalid: %s\n", 1, argv[0]);
return CMD_RET_USAGE;
}
if (strict_strtoul(argv[1], 10, &var_cpn) < 0 ||
var_cpn == 0 || var_cpn > 15) {
printf("argument %d invalid: %s\n", 2, argv[1]);
return CMD_RET_USAGE;
}
revision = argv[2][0] - 'A' + 1;
if (strlen(argv[2]) > 1 || revision == 0 || revision > 15) {
printf("argument %d invalid: %s\n", 3, argv[2]);
return CMD_RET_USAGE;
}
if (strict_strtoul(argv[3], 10, &var_fg) < 0 ||
var_fg > 15) {
printf("argument %d invalid: %s\n", 4, argv[3]);
return CMD_RET_USAGE;
}
if (strict_strtoul(argv[4], 10, &bom) < 0 ||
bom == 0 || bom > 15) {
printf("argument %d invalid: %s\n", 4, argv[3]);
return CMD_RET_USAGE;
}
/* st board indentification value */
otp = (board << 16) | (var_cpn << 12) | (revision << 8) |
(var_fg << 4) | bom;
display_stboard(otp);
printf("=> OTP[%d] = %08X\n", BSEC_OTP_BOARD, otp);
if (!check_stboard((u16)board)) {
printf("Unknown board MB%04x\n", (u16)board);
return CMD_RET_FAILURE;
}
if (!confirmed) {
printf("Warning: Programming BOARD in OTP is irreversible!\n");
printf("Really perform this OTP programming? <y/N>\n");
if (!confirm_yesno()) {
puts("BOARD programming aborted\n");
return CMD_RET_FAILURE;
}
}
ret = misc_write(dev, STM32_BSEC_OTP(BSEC_OTP_BOARD),
&otp, sizeof(otp));
if (ret < 0) {
puts("BOARD programming error\n");
return CMD_RET_FAILURE;
}
/* write persistent lock */
otp = 1;
ret = misc_write(dev, STM32_BSEC_LOCK(BSEC_OTP_BOARD),
&otp, sizeof(otp));
if (ret < 0) {
puts("BOARD lock error\n");
return CMD_RET_FAILURE;
}
puts("BOARD programming done\n");
return CMD_RET_SUCCESS;
}
U_BOOT_CMD(stboard, 7, 0, do_stboard,
"read/write board reference in OTP",
"\n"
" Print current board information\n"
"stboard [-y] <Board> <VarCPN> <Revision> <VarFG> <BOM>\n"
" Write board information\n"
" - Board: xxxx, example 1264 for MB1264\n"
" - VarCPN: 1...15\n"
" - Revision: A...O\n"
" - VarFG: 0...15\n"
" - BOM: 1...15\n");
#endif
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