mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-04 21:48:17 +00:00
101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
#include <string.h>
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#include "flash_otp.h"
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#include "model.h"
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#include "mpu.h"
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#include "unit_variant.h"
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#include TREZOR_BOARD
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#ifdef KERNEL_MODE
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static uint8_t unit_variant_color = 0;
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static uint8_t unit_variant_packaging = 0;
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static bool unit_variant_btconly = false;
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static bool unit_variant_ok = false;
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static int16_t unit_variant_build_year = -1;
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static void unit_variant_0x01(const uint8_t *data) {
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unit_variant_color = data[1];
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unit_variant_btconly = data[2] == 1;
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unit_variant_packaging = data[3];
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unit_variant_ok = true;
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}
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static int16_t unit_variant_get_build_year(void) {
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uint8_t data[FLASH_OTP_BLOCK_SIZE] = {0};
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secbool result =
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flash_otp_read(FLASH_OTP_BLOCK_BATCH, 0, data, FLASH_OTP_BLOCK_SIZE);
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if (sectrue != result || data[0] == 0xFF) {
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return -1;
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}
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/**
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* Expecting format {MODEL_IDENTIFIER}-YYMMDD
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*
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* See also
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* https://docs.trezor.io/trezor-firmware/core/misc/memory.html?highlight=otp#otp
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*/
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size_t len = strnlen((char *)data, FLASH_OTP_BLOCK_SIZE);
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for (int i = 0; i < len; i++) {
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if (data[i] == '-') {
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if ((len - (i + 1)) != 6) {
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return -1;
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}
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return ((int16_t)data[i + 1] - (int16_t)'0') * 10 +
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((int16_t)data[i + 2] - (int16_t)'0');
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}
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}
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return -1;
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}
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void unit_variant_init(void) {
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uint8_t data[FLASH_OTP_BLOCK_SIZE];
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secbool result = flash_otp_read(FLASH_OTP_BLOCK_DEVICE_VARIANT, 0, data,
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FLASH_OTP_BLOCK_SIZE);
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unit_variant_build_year = unit_variant_get_build_year();
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if (sectrue == result) {
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switch (data[0]) {
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case 0x01:
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unit_variant_0x01(data);
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break;
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default:
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break;
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}
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}
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}
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uint8_t unit_variant_get_color(void) { return unit_variant_color; }
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uint8_t unit_variant_get_packaging(void) { return unit_variant_packaging; }
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bool unit_variant_get_btconly(void) { return unit_variant_btconly; }
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bool unit_variant_present(void) { return unit_variant_ok; }
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bool unit_variant_is_sd_hotswap_enabled(void) {
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#ifndef USE_SD_CARD
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return false;
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#else
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#ifdef TREZOR_MODEL_T
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// early produced TTs have a HW bug that prevents hotswapping of the SD card,
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// lets check the build data and decide based on that
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if (unit_variant_build_year <= 18) {
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return false;
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}
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return true;
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#else
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return true;
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#endif
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#endif
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}
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#endif // KERNEL_MODE
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