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https://github.com/brain-hackers/u-boot-brain
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65e25bea59
In the spirit of using the same base name for all of these related macros, rename this to have the operation at the end. This is not widely used so the impact is fairly small. Signed-off-by: Simon Glass <sjg@chromium.org>
102 lines
2.2 KiB
C
102 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
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/*
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* Copyright (C) 2019, STMicroelectronics - All Rights Reserved
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*/
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#include <common.h>
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#include <command.h>
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#include <console.h>
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#include <misc.h>
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#include <dm/device.h>
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#include <dm/uclass.h>
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#define STM32_OTP_HASH_KEY_START 24
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#define STM32_OTP_HASH_KEY_SIZE 8
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static void read_hash_value(u32 addr)
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{
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int i;
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for (i = 0; i < STM32_OTP_HASH_KEY_SIZE; i++) {
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printf("OTP value %i: %x\n", STM32_OTP_HASH_KEY_START + i,
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__be32_to_cpu(*(u32 *)addr));
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addr += 4;
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}
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}
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static void fuse_hash_value(u32 addr, bool print)
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{
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struct udevice *dev;
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u32 word, val;
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int i, ret;
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ret = uclass_get_device_by_driver(UCLASS_MISC,
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DM_DRIVER_GET(stm32mp_bsec),
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&dev);
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if (ret) {
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pr_err("Can't find stm32mp_bsec driver\n");
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return;
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}
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for (i = 0; i < STM32_OTP_HASH_KEY_SIZE; i++) {
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if (print)
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printf("Fuse OTP %i : %x\n",
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STM32_OTP_HASH_KEY_START + i,
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__be32_to_cpu(*(u32 *)addr));
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word = STM32_OTP_HASH_KEY_START + i;
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val = __be32_to_cpu(*(u32 *)addr);
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misc_write(dev, STM32_BSEC_OTP(word), &val, 4);
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addr += 4;
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}
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}
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static int confirm_prog(void)
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{
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puts("Warning: Programming fuses is an irreversible operation!\n"
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" This may brick your system.\n"
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" Use this command only if you are sure of what you are doing!\n"
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"\nReally perform this fuse programming? <y/N>\n");
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if (confirm_yesno())
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return 1;
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puts("Fuse programming aborted\n");
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return 0;
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}
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static int do_stm32key(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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u32 addr;
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const char *op = argc >= 2 ? argv[1] : NULL;
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int confirmed = argc > 3 && !strcmp(argv[2], "-y");
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argc -= 2 + confirmed;
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argv += 2 + confirmed;
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if (argc < 1)
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return CMD_RET_USAGE;
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addr = simple_strtoul(argv[0], NULL, 16);
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if (!addr)
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return CMD_RET_USAGE;
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if (!strcmp(op, "read"))
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read_hash_value(addr);
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if (!strcmp(op, "fuse")) {
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if (!confirmed && !confirm_prog())
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return CMD_RET_FAILURE;
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fuse_hash_value(addr, !confirmed);
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}
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return CMD_RET_SUCCESS;
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}
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U_BOOT_CMD(stm32key, 4, 1, do_stm32key,
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"Fuse ST Hash key",
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"read <addr>: Read the hash store at addr in memory\n"
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"stm32key fuse [-y] <addr> : Fuse hash store at addr in otp\n");
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