From e83cef87a847d10aa2c46308bd8ac870bf56deee Mon Sep 17 00:00:00 2001 From: Patrick Delaunay Date: Thu, 15 Sep 2022 18:11:41 +0200 Subject: [PATCH] arm: stm32mp: adapt the command stm32key for STM32MP13x Change the mask of OTP0 used to close the device on STM32MP - STM32MP15x: bit 6 of OPT0 - STM32MP13x: 0b111111 = 0x3F for OTP_SECURED closed device And support the 2 keys for STM32MP13x - PKHTH : Hash of the 8 ECC Public Keys Hashes Table (ECDSA is the authentication algorithm) - EDMK : Encryption/Decryption Master Key Signed-off-by: Patrick Delaunay Reviewed-by: Patrice Chotard --- arch/arm/mach-stm32mp/cmd_stm32key.c | 52 ++++++++++++++++++++++++---- 1 file changed, 45 insertions(+), 7 deletions(-) diff --git a/arch/arm/mach-stm32mp/cmd_stm32key.c b/arch/arm/mach-stm32mp/cmd_stm32key.c index 4eac56082d..278253e472 100644 --- a/arch/arm/mach-stm32mp/cmd_stm32key.c +++ b/arch/arm/mach-stm32mp/cmd_stm32key.c @@ -11,9 +11,14 @@ #include #include -/* Closed device : bit 6 of OPT0*/ +/* + * Closed device: OTP0 + * STM32MP15x: bit 6 of OPT0 + * STM32MP13x: 0b111111 = 0x3F for OTP_SECURED closed device + */ #define STM32_OTP_CLOSE_ID 0 -#define STM32_OTP_CLOSE_MASK BIT(6) +#define STM32_OTP_STM32MP13x_CLOSE_MASK 0x3F +#define STM32_OTP_STM32MP15x_CLOSE_MASK BIT(6) /* PKH is the first element of the key list */ #define STM32KEY_PKH 0 @@ -25,6 +30,21 @@ struct stm32key { u8 size; }; +const struct stm32key stm32mp13_list[] = { + [STM32KEY_PKH] = { + .name = "PKHTH", + .desc = "Hash of the 8 ECC Public Keys Hashes Table (ECDSA is the authentication algorithm)", + .start = 24, + .size = 8, + }, + { + .name = "EDMK", + .desc = "Encryption/Decryption Master Key", + .start = 92, + .size = 4, + } +}; + const struct stm32key stm32mp15_list[] = { [STM32KEY_PKH] = { .name = "PKH", @@ -39,12 +59,29 @@ static u8 stm32key_index; static u8 get_key_nb(void) { - return ARRAY_SIZE(stm32mp15_list); + if (IS_ENABLED(CONFIG_STM32MP13x)) + return ARRAY_SIZE(stm32mp13_list); + + if (IS_ENABLED(CONFIG_STM32MP15x)) + return ARRAY_SIZE(stm32mp15_list); } static const struct stm32key *get_key(u8 index) { - return &stm32mp15_list[index]; + if (IS_ENABLED(CONFIG_STM32MP13x)) + return &stm32mp13_list[index]; + + if (IS_ENABLED(CONFIG_STM32MP15x)) + return &stm32mp15_list[index]; +} + +static u32 get_otp_close_mask(void) +{ + if (IS_ENABLED(CONFIG_STM32MP13x)) + return STM32_OTP_STM32MP13x_CLOSE_MASK; + + if (IS_ENABLED(CONFIG_STM32MP15x)) + return STM32_OTP_STM32MP15x_CLOSE_MASK; } #define BSEC_LOCK_ERROR (-1) @@ -123,7 +160,7 @@ static int read_key_otp(struct udevice *dev, const struct stm32key *key, bool pr static int read_close_status(struct udevice *dev, bool print, bool *closed) { int word, ret, result; - u32 val, lock; + u32 val, lock, mask; bool status; result = 0; @@ -140,7 +177,8 @@ static int read_close_status(struct udevice *dev, bool print, bool *closed) if (ret != 4) lock = BSEC_LOCK_ERROR; - status = (val & STM32_OTP_CLOSE_MASK) == STM32_OTP_CLOSE_MASK; + mask = get_otp_close_mask(); + status = (val & mask) == mask; if (closed) *closed = status; if (print) @@ -371,7 +409,7 @@ static int do_stm32key_close(struct cmd_tbl *cmdtp, int flag, int argc, char *co if (!yes && !confirm_prog()) return CMD_RET_FAILURE; - val = STM32_OTP_CLOSE_MASK; + val = get_otp_close_mask(); ret = misc_write(dev, STM32_BSEC_OTP(STM32_OTP_CLOSE_ID), &val, 4); if (ret != 4) { printf("Error: can't update OTP %d\n", STM32_OTP_CLOSE_ID); -- 2.39.5