modtrezorio: add FlashOTP class

embed/extmod/modtrezorio/modtrezorio-flash.h

@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) Pavol Rusnak, SatoshiLabs
+ *
+ * Licensed under TREZOR License
+ * see LICENSE file for details
+ */
+
+#if defined TREZOR_STM32
+#include "flash.h"
+#elif defined TREZOR_UNIX
+#include "unix-flash-mock.h"
+#else
+#error Unsupported TREZOR port. Only STM32 and UNIX ports are supported.
+#endif
+
+/// class FlashOTP:
+///     '''
+///     '''
+typedef struct _mp_obj_FlashOTP_t {
+    mp_obj_base_t base;
+} mp_obj_FlashOTP_t;
+
+/// def __init__(self) -> None:
+///     '''
+///     '''
+STATIC mp_obj_t mod_trezorio_FlashOTP_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
+    mp_arg_check_num(n_args, n_kw, 0, 0, false);
+    mp_obj_FlashOTP_t *o = m_new_obj(mp_obj_FlashOTP_t);
+    o->base.type = type;
+    return MP_OBJ_FROM_PTR(o);
+}
+
+/// def FlashOTP.write(self, block: int, offset: int, data: bytes) -> None:
+///     '''
+///     Writes data to OTP flash
+///     '''
+STATIC mp_obj_t mod_trezorio_FlashOTP_write(size_t n_args, const mp_obj_t *args) {
+    uint8_t block = mp_obj_get_int(args[1]);
+    uint8_t offset = mp_obj_get_int(args[2]);
+    mp_buffer_info_t data;
+    mp_get_buffer_raise(args[3], &data, MP_BUFFER_READ);
+    if (!flash_otp_write(block, offset, data.buf, data.len)) {
+        mp_raise_ValueError("write failed");
+    }
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_trezorio_FlashOTP_write_obj, 4, 4, mod_trezorio_FlashOTP_write);
+
+/// def FlashOTP.read(self, block: int, offset: int, data: bytearray) -> None:
+///     '''
+///     Reads data from OTP flash
+///     '''
+STATIC mp_obj_t mod_trezorio_FlashOTP_read(size_t n_args, const mp_obj_t *args) {
+    uint8_t block = mp_obj_get_int(args[1]);
+    uint8_t offset = mp_obj_get_int(args[2]);
+    mp_buffer_info_t data;
+    mp_get_buffer_raise(args[3], &data, MP_BUFFER_WRITE);
+    if (!flash_otp_read(block, offset, data.buf, data.len)) {
+        mp_raise_ValueError("read failed");
+    }
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_trezorio_FlashOTP_read_obj, 4, 4, mod_trezorio_FlashOTP_read);
+
+/// def FlashOTP.lock(self, block: int) -> None:
+///     '''
+///     Lock OTP flash block
+///     '''
+STATIC mp_obj_t mod_trezorio_FlashOTP_lock(mp_obj_t self, mp_obj_t block) {
+    uint8_t b = mp_obj_get_int(block);
+    if (!flash_otp_lock(b)) {
+        mp_raise_ValueError("lock failed");
+    }
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_trezorio_FlashOTP_lock_obj, mod_trezorio_FlashOTP_lock);
+
+/// def FlashOTP.is_locked(self, block: int) -> bool:
+///     '''
+///     Is OTP flash block locked?
+///     '''
+STATIC mp_obj_t mod_trezorio_FlashOTP_is_locked(mp_obj_t self, mp_obj_t block) {
+    uint8_t b = mp_obj_get_int(block);
+    return flash_otp_is_locked(b) ? mp_const_true : mp_const_false;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_trezorio_FlashOTP_is_locked_obj, mod_trezorio_FlashOTP_is_locked);
+
+STATIC const mp_rom_map_elem_t mod_trezorio_FlashOTP_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mod_trezorio_FlashOTP_read_obj) },
+    { MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mod_trezorio_FlashOTP_write_obj) },
+    { MP_ROM_QSTR(MP_QSTR_lock), MP_ROM_PTR(&mod_trezorio_FlashOTP_lock_obj) },
+    { MP_ROM_QSTR(MP_QSTR_is_locked), MP_ROM_PTR(&mod_trezorio_FlashOTP_is_locked_obj) },
+};
+STATIC MP_DEFINE_CONST_DICT(mod_trezorio_FlashOTP_locals_dict, mod_trezorio_FlashOTP_locals_dict_table);
+
+STATIC const mp_obj_type_t mod_trezorio_FlashOTP_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_FlashOTP,
+    .make_new = mod_trezorio_FlashOTP_make_new,
+    .locals_dict = (void*)&mod_trezorio_FlashOTP_locals_dict,
+};

embed/extmod/modtrezorio/modtrezorio.c

@@ -11,6 +11,7 @@
 
 #if MICROPY_PY_TREZORIO
 
+#include "modtrezorio-flash.h"
 #include "modtrezorio-sbu.h"
 #include "modtrezorio-sdcard.h"
 #include "modtrezorio-msg.h"
@@ -18,6 +19,8 @@
 STATIC const mp_rom_map_elem_t mp_module_trezorio_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_trezorio) },
 
+    { MP_ROM_QSTR(MP_QSTR_FlashOTP), MP_ROM_PTR(&mod_trezorio_FlashOTP_type) },
+
     { MP_ROM_QSTR(MP_QSTR_SBU), MP_ROM_PTR(&mod_trezorio_SBU_type) },
 
     { MP_ROM_QSTR(MP_QSTR_SDCard), MP_ROM_PTR(&mod_trezorio_SDCard_type) },

embed/extmod/modtrezorio/unix-flash-mock.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) Pavol Rusnak, SatoshiLabs
+ *
+ * Licensed under TREZOR License
+ * see LICENSE file for details
+ */
+
+#include "../../trezorhal/flash.h"
+
+int flash_init(void)
+{
+    return 0;
+}
+
+void flash_set_option_bytes(void)
+{
+}
+
+bool flash_unlock(void)
+{
+    return false;
+}
+
+bool flash_lock(void)
+{
+    return false;
+}
+
+bool flash_erase_sectors(int start, int end, void (*progress)(uint16_t val))
+{
+    return false;
+}
+
+bool flash_otp_read(uint8_t block, uint8_t offset, uint8_t *data, uint8_t datalen)
+{
+    return false;
+}
+
+bool flash_otp_write(uint8_t block, uint8_t offset, const uint8_t *data, uint8_t datalen)
+{
+    return false;
+}
+
+bool flash_otp_lock(uint8_t block)
+{
+    return false;
+}
+
+bool flash_otp_is_locked(uint8_t block)
+{
+    return false;
+}

embed/trezorhal/flash.c

@@ -84,6 +84,17 @@ bool flash_erase_sectors(int start, int end, void (*progress)(uint16_t val))
 #define FLASH_OTP_NUM_BLOCKS      16
 #define FLASH_OTP_BLOCK_SIZE      32
 
+bool flash_otp_read(uint8_t block, uint8_t offset, uint8_t *data, uint8_t datalen)
+{
+    if (block >= FLASH_OTP_NUM_BLOCKS || offset + datalen > FLASH_OTP_BLOCK_SIZE) {
+        return false;
+    }
+    for (uint8_t i = 0; i < datalen; i++) {
+        data[i] = *(__IO uint8_t *)(FLASH_OTP_BASE + block * FLASH_OTP_BLOCK_SIZE + offset + i);
+    }
+    return true;
+}
+
 bool flash_otp_write(uint8_t block, uint8_t offset, const uint8_t *data, uint8_t datalen)
 {
     if (block >= FLASH_OTP_NUM_BLOCKS || offset + datalen > FLASH_OTP_BLOCK_SIZE) {
@@ -103,17 +114,6 @@ bool flash_otp_write(uint8_t block, uint8_t offset, const uint8_t *data, uint8_t
     return ret == HAL_OK;
 }
 
-bool flash_otp_read(uint8_t block, uint8_t offset, uint8_t *data, uint8_t datalen)
-{
-    if (block >= FLASH_OTP_NUM_BLOCKS || offset + datalen > FLASH_OTP_BLOCK_SIZE) {
-        return false;
-    }
-    for (uint8_t i = 0; i < datalen; i++) {
-        data[i] = *(__IO uint8_t *)(FLASH_OTP_BASE + block * FLASH_OTP_BLOCK_SIZE + offset + i);
-    }
-    return true;
-}
-
 bool flash_otp_lock(uint8_t block)
 {
     if (block >= FLASH_OTP_NUM_BLOCKS) {

embed/trezorhal/flash.h

@@ -25,8 +25,8 @@ bool flash_lock(void);
 
 bool flash_erase_sectors(int start, int end, void (*progress)(uint16_t val));
 
-bool flash_otp_write(uint8_t block, uint8_t offset, const uint8_t *data, uint8_t datalen);
 bool flash_otp_read(uint8_t block, uint8_t offset, uint8_t *data, uint8_t datalen);
+bool flash_otp_write(uint8_t block, uint8_t offset, const uint8_t *data, uint8_t datalen);
 bool flash_otp_lock(uint8_t block);
 bool flash_otp_is_locked(uint8_t block);