Store serial number from atsha cryptochip into the serial# env variable. U-Boot automatically puts content of this variable into the root device tree property serial-number when booting Linux kernel. Refactor turris atsha code and from turris_atsha_otp_get_serial_number() function returns directly string suitable for printing or storing into device tree. Because during different boot stages is env storage read-only, it is not possible to always store serial number into env storage. So introduce a new function turris_atsha_otp_init_serial_number() which is called at later stage and which ensures that serial number is correctly stored into env.
Signed-off-by: Pali Rohár pali@kernel.org --- board/CZ.NIC/turris_atsha_otp.c | 33 +++++++++++++++++++++--- board/CZ.NIC/turris_atsha_otp.h | 3 ++- board/CZ.NIC/turris_omnia/turris_omnia.c | 11 +++----- 3 files changed, 36 insertions(+), 11 deletions(-)
diff --git a/board/CZ.NIC/turris_atsha_otp.c b/board/CZ.NIC/turris_atsha_otp.c index aa4e29b1560e..a29fe3623174 100644 --- a/board/CZ.NIC/turris_atsha_otp.c +++ b/board/CZ.NIC/turris_atsha_otp.c @@ -93,30 +93,57 @@ int turris_atsha_otp_init_mac_addresses(int first_idx) return 0; }
-int turris_atsha_otp_get_serial_number(u32 *version_num, u32 *serial_num) +int turris_atsha_otp_init_serial_number(void) +{ + char serial[17]; + int ret; + + ret = turris_atsha_otp_get_serial_number(serial); + if (ret) + return ret; + + if (!env_get("serial#")) + return -1; + + return 0; +} + +int turris_atsha_otp_get_serial_number(char serial[17]) { struct udevice *dev = get_atsha204a_dev(); + u32 version_num, serial_num; + const char *serial_env; int ret;
if (!dev) return -1;
+ serial_env = env_get("serial#"); + if (serial_env && strlen(serial_env) == 16) { + memcpy(serial, serial_env, 17); + return 0; + } + ret = atsha204a_wakeup(dev); if (ret) return ret;
ret = atsha204a_read(dev, ATSHA204A_ZONE_OTP, false, TURRIS_ATSHA_OTP_VERSION, - (u8 *)version_num); + (u8 *)&version_num); if (ret) return ret;
ret = atsha204a_read(dev, ATSHA204A_ZONE_OTP, false, TURRIS_ATSHA_OTP_SERIAL, - (u8 *)serial_num); + (u8 *)&serial_num); if (ret) return ret;
atsha204a_sleep(dev); + + sprintf(serial, "%08X%08X", be32_to_cpu(version_num), be32_to_cpu(serial_num)); + env_set("serial#", serial); + return 0; } diff --git a/board/CZ.NIC/turris_atsha_otp.h b/board/CZ.NIC/turris_atsha_otp.h index bd4308fdc3ef..2cfe20bbc3a7 100644 --- a/board/CZ.NIC/turris_atsha_otp.h +++ b/board/CZ.NIC/turris_atsha_otp.h @@ -4,6 +4,7 @@ #define TURRIS_ATSHA_OTP_H
int turris_atsha_otp_init_mac_addresses(int first_idx); -int turris_atsha_otp_get_serial_number(u32 *version_num, u32 *serial_num); +int turris_atsha_otp_init_serial_number(void); +int turris_atsha_otp_get_serial_number(char serial[17]);
#endif diff --git a/board/CZ.NIC/turris_omnia/turris_omnia.c b/board/CZ.NIC/turris_omnia/turris_omnia.c index ab5061ef582b..cf8a6026702b 100644 --- a/board/CZ.NIC/turris_omnia/turris_omnia.c +++ b/board/CZ.NIC/turris_omnia/turris_omnia.c @@ -963,19 +963,15 @@ int board_late_init(void)
int show_board_info(void) { - u32 version_num, serial_num; + char serial[17]; int err;
- err = turris_atsha_otp_get_serial_number(&version_num, &serial_num); + err = turris_atsha_otp_get_serial_number(serial); printf("Model: Turris Omnia\n"); printf(" MCU type: %s\n", omnia_get_mcu_type()); printf(" MCU version: %s\n", omnia_get_mcu_version()); printf(" RAM size: %i MiB\n", omnia_get_ram_size_gb() * 1024); - if (err) - printf(" Serial Number: unknown\n"); - else - printf(" Serial Number: %08X%08X\n", be32_to_cpu(version_num), - be32_to_cpu(serial_num)); + printf(" Serial Number: %s\n", !err ? serial : "unknown");
return 0; } @@ -983,6 +979,7 @@ int show_board_info(void) int misc_init_r(void) { turris_atsha_otp_init_mac_addresses(1); + turris_atsha_otp_init_serial_number(); return 0; }