211 lines
7.1 KiB
Python
211 lines
7.1 KiB
Python
# SPDX-FileCopyrightText: 2014-2022 Fredrik Ahlberg, Angus Gratton,
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# Espressif Systems (Shanghai) CO LTD, other contributors as noted.
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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import struct
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from .esp32 import ESP32ROM
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from ..loader import ESPLoader
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from ..util import FatalError, NotImplementedInROMError
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class ESP32C3ROM(ESP32ROM):
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CHIP_NAME = "ESP32-C3"
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IMAGE_CHIP_ID = 5
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FPGA_SLOW_BOOT = False
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IROM_MAP_START = 0x42000000
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IROM_MAP_END = 0x42800000
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DROM_MAP_START = 0x3C000000
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DROM_MAP_END = 0x3C800000
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SPI_REG_BASE = 0x60002000
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SPI_USR_OFFS = 0x18
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SPI_USR1_OFFS = 0x1C
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SPI_USR2_OFFS = 0x20
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SPI_MOSI_DLEN_OFFS = 0x24
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SPI_MISO_DLEN_OFFS = 0x28
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SPI_W0_OFFS = 0x58
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BOOTLOADER_FLASH_OFFSET = 0x0
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# Magic value for ESP32C3 eco 1+2 and ESP32C3 eco3 respectivly
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CHIP_DETECT_MAGIC_VALUE = [0x6921506F, 0x1B31506F]
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UART_DATE_REG_ADDR = 0x60000000 + 0x7C
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UART_CLKDIV_REG = 0x60000014
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EFUSE_BASE = 0x60008800
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EFUSE_BLOCK1_ADDR = EFUSE_BASE + 0x044
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MAC_EFUSE_REG = EFUSE_BASE + 0x044
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EFUSE_RD_REG_BASE = EFUSE_BASE + 0x030 # BLOCK0 read base address
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EFUSE_PURPOSE_KEY0_REG = EFUSE_BASE + 0x34
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EFUSE_PURPOSE_KEY0_SHIFT = 24
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EFUSE_PURPOSE_KEY1_REG = EFUSE_BASE + 0x34
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EFUSE_PURPOSE_KEY1_SHIFT = 28
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EFUSE_PURPOSE_KEY2_REG = EFUSE_BASE + 0x38
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EFUSE_PURPOSE_KEY2_SHIFT = 0
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EFUSE_PURPOSE_KEY3_REG = EFUSE_BASE + 0x38
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EFUSE_PURPOSE_KEY3_SHIFT = 4
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EFUSE_PURPOSE_KEY4_REG = EFUSE_BASE + 0x38
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EFUSE_PURPOSE_KEY4_SHIFT = 8
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EFUSE_PURPOSE_KEY5_REG = EFUSE_BASE + 0x38
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EFUSE_PURPOSE_KEY5_SHIFT = 12
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EFUSE_DIS_DOWNLOAD_MANUAL_ENCRYPT_REG = EFUSE_RD_REG_BASE
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EFUSE_DIS_DOWNLOAD_MANUAL_ENCRYPT = 1 << 20
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EFUSE_SPI_BOOT_CRYPT_CNT_REG = EFUSE_BASE + 0x034
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EFUSE_SPI_BOOT_CRYPT_CNT_MASK = 0x7 << 18
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EFUSE_SECURE_BOOT_EN_REG = EFUSE_BASE + 0x038
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EFUSE_SECURE_BOOT_EN_MASK = 1 << 20
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PURPOSE_VAL_XTS_AES128_KEY = 4
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SUPPORTS_ENCRYPTED_FLASH = True
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FLASH_ENCRYPTED_WRITE_ALIGN = 16
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UARTDEV_BUF_NO = 0x3FCDF07C # Variable in ROM .bss which indicates the port in use
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UARTDEV_BUF_NO_USB_JTAG_SERIAL = 3 # The above var when USB-JTAG/Serial is used
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RTC_CNTL_WDT_WKEY = 0x50D83AA1
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RTCCNTL_BASE_REG = 0x60008000
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RTC_CNTL_WDTCONFIG0_REG = RTCCNTL_BASE_REG + 0x0090
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RTC_CNTL_WDTWPROTECT_REG = RTCCNTL_BASE_REG + 0x00A8
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MEMORY_MAP = [
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[0x00000000, 0x00010000, "PADDING"],
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[0x3C000000, 0x3C800000, "DROM"],
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[0x3FC80000, 0x3FCE0000, "DRAM"],
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[0x3FC88000, 0x3FD00000, "BYTE_ACCESSIBLE"],
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[0x3FF00000, 0x3FF20000, "DROM_MASK"],
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[0x40000000, 0x40060000, "IROM_MASK"],
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[0x42000000, 0x42800000, "IROM"],
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[0x4037C000, 0x403E0000, "IRAM"],
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[0x50000000, 0x50002000, "RTC_IRAM"],
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[0x50000000, 0x50002000, "RTC_DRAM"],
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[0x600FE000, 0x60100000, "MEM_INTERNAL2"],
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]
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def get_pkg_version(self):
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num_word = 3
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return (self.read_reg(self.EFUSE_BLOCK1_ADDR + (4 * num_word)) >> 21) & 0x07
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def get_minor_chip_version(self):
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hi_num_word = 5
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hi = (self.read_reg(self.EFUSE_BLOCK1_ADDR + (4 * hi_num_word)) >> 23) & 0x01
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low_num_word = 3
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low = (self.read_reg(self.EFUSE_BLOCK1_ADDR + (4 * low_num_word)) >> 18) & 0x07
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return (hi << 3) + low
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def get_major_chip_version(self):
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num_word = 5
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return (self.read_reg(self.EFUSE_BLOCK1_ADDR + (4 * num_word)) >> 24) & 0x03
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def get_chip_description(self):
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chip_name = {
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0: "ESP32-C3",
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}.get(self.get_pkg_version(), "unknown ESP32-C3")
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major_rev = self.get_major_chip_version()
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minor_rev = self.get_minor_chip_version()
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return f"{chip_name} (revision v{major_rev}.{minor_rev})"
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def get_chip_features(self):
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return ["WiFi", "BLE"]
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def get_crystal_freq(self):
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# ESP32C3 XTAL is fixed to 40MHz
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return 40
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def override_vddsdio(self, new_voltage):
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raise NotImplementedInROMError(
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"VDD_SDIO overrides are not supported for ESP32-C3"
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)
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def read_mac(self):
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mac0 = self.read_reg(self.MAC_EFUSE_REG)
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mac1 = self.read_reg(self.MAC_EFUSE_REG + 4) # only bottom 16 bits are MAC
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bitstring = struct.pack(">II", mac1, mac0)[2:]
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return tuple(bitstring)
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def get_flash_crypt_config(self):
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return None # doesn't exist on ESP32-C3
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def get_secure_boot_enabled(self):
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return (
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self.read_reg(self.EFUSE_SECURE_BOOT_EN_REG)
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& self.EFUSE_SECURE_BOOT_EN_MASK
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)
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def get_key_block_purpose(self, key_block):
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if key_block < 0 or key_block > 5:
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raise FatalError("Valid key block numbers must be in range 0-5")
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reg, shift = [
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(self.EFUSE_PURPOSE_KEY0_REG, self.EFUSE_PURPOSE_KEY0_SHIFT),
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(self.EFUSE_PURPOSE_KEY1_REG, self.EFUSE_PURPOSE_KEY1_SHIFT),
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(self.EFUSE_PURPOSE_KEY2_REG, self.EFUSE_PURPOSE_KEY2_SHIFT),
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(self.EFUSE_PURPOSE_KEY3_REG, self.EFUSE_PURPOSE_KEY3_SHIFT),
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(self.EFUSE_PURPOSE_KEY4_REG, self.EFUSE_PURPOSE_KEY4_SHIFT),
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(self.EFUSE_PURPOSE_KEY5_REG, self.EFUSE_PURPOSE_KEY5_SHIFT),
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][key_block]
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return (self.read_reg(reg) >> shift) & 0xF
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def is_flash_encryption_key_valid(self):
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# Need to see an AES-128 key
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purposes = [self.get_key_block_purpose(b) for b in range(6)]
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return any(p == self.PURPOSE_VAL_XTS_AES128_KEY for p in purposes)
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def change_baud(self, baud):
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ESPLoader.change_baud(self, baud)
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def uses_usb_jtag_serial(self):
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"""
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Check the UARTDEV_BUF_NO register to see if USB-JTAG/Serial is being used
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"""
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if self.secure_download_mode:
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return False # Can't detect USB-JTAG/Serial in secure download mode
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return self.get_uart_no() == self.UARTDEV_BUF_NO_USB_JTAG_SERIAL
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def disable_rtc_watchdog(self):
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# When USB-JTAG/Serial is used, the RTC watchdog is not reset
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# and can then reset the board during flashing. Disable it.
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if self.uses_usb_jtag_serial():
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self.write_reg(self.RTC_CNTL_WDTWPROTECT_REG, self.RTC_CNTL_WDT_WKEY)
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self.write_reg(self.RTC_CNTL_WDTCONFIG0_REG, 0)
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self.write_reg(self.RTC_CNTL_WDTWPROTECT_REG, 0)
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def _post_connect(self):
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if not self.sync_stub_detected: # Don't run if stub is reused
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self.disable_rtc_watchdog()
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class ESP32C3StubLoader(ESP32C3ROM):
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"""Access class for ESP32C3 stub loader, runs on top of ROM.
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(Basically the same as ESP32StubLoader, but different base class.
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Can possibly be made into a mixin.)
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"""
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FLASH_WRITE_SIZE = 0x4000 # matches MAX_WRITE_BLOCK in stub_loader.c
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STATUS_BYTES_LENGTH = 2 # same as ESP8266, different to ESP32 ROM
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IS_STUB = True
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def __init__(self, rom_loader):
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self.secure_download_mode = rom_loader.secure_download_mode
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self._port = rom_loader._port
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self._trace_enabled = rom_loader._trace_enabled
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self.cache = rom_loader.cache
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self.flush_input() # resets _slip_reader
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ESP32C3ROM.STUB_CLASS = ESP32C3StubLoader
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