# SPDX-FileCopyrightText: 2014-2022 Fredrik Ahlberg, Angus Gratton,
# Espressif Systems (Shanghai) CO LTD, other contributors as noted.
#
# SPDX-License-Identifier: GPL-2.0-or-later
from ..loader import ESPLoader
from ..util import FatalError, NotSupportedError
class ESP8266ROM(ESPLoader):
"""Access class for ESP8266 ROM bootloader"""
CHIP_NAME = "ESP8266"
IS_STUB = False
CHIP_DETECT_MAGIC_VALUE = [0xFFF0C101]
# OTP ROM addresses
ESP_OTP_MAC0 = 0x3FF00050
ESP_OTP_MAC1 = 0x3FF00054
ESP_OTP_MAC3 = 0x3FF0005C
SPI_REG_BASE = 0x60000200
SPI_USR_OFFS = 0x1C
SPI_USR1_OFFS = 0x20
SPI_USR2_OFFS = 0x24
SPI_MOSI_DLEN_OFFS = None
SPI_MISO_DLEN_OFFS = None
SPI_W0_OFFS = 0x40
UART_CLKDIV_REG = 0x60000014
XTAL_CLK_DIVIDER = 2
FLASH_SIZES = {
"512KB": 0x00,
"256KB": 0x10,
"1MB": 0x20,
"2MB": 0x30,
"4MB": 0x40,
"2MB-c1": 0x50,
"4MB-c1": 0x60,
"8MB": 0x80,
"16MB": 0x90,
}
FLASH_FREQUENCY = {
"80m": 0xF,
"40m": 0x0,
"26m": 0x1,
"20m": 0x2,
}
BOOTLOADER_FLASH_OFFSET = 0
MEMORY_MAP = [
[0x3FF00000, 0x3FF00010, "DPORT"],
[0x3FFE8000, 0x40000000, "DRAM"],
[0x40100000, 0x40108000, "IRAM"],
[0x40201010, 0x402E1010, "IROM"],
]
UF2_FAMILY_ID = 0x7EAB61ED
def get_efuses(self):
# Return the 128 bits of ESP8266 efuse as a single Python integer
result = self.read_reg(0x3FF0005C) << 96
result |= self.read_reg(0x3FF00058) << 64
result |= self.read_reg(0x3FF00054) << 32
result |= self.read_reg(0x3FF00050)
return result
def _get_flash_size(self, efuses):
# rX_Y = EFUSE_DATA_OUTX[Y]
r0_4 = (efuses & (1 << 4)) != 0
r3_25 = (efuses & (1 << 121)) != 0
r3_26 = (efuses & (1 << 122)) != 0
r3_27 = (efuses & (1 << 123)) != 0
if r0_4 and not r3_25:
if not r3_27 and not r3_26:
return 1
elif not r3_27 and r3_26:
return 2
if not r0_4 and r3_25:
if not r3_27 and not r3_26:
return 2
elif not r3_27 and r3_26:
return 4
return -1
def get_chip_description(self):
efuses = self.get_efuses()
is_8285 = (
efuses & ((1 << 4) | 1 << 80)
) != 0 # One or the other efuse bit is set for ESP8285
if is_8285:
flash_size = self._get_flash_size(efuses)
max_temp = (
efuses & (1 << 5)
) != 0 # This efuse bit identifies the max flash temperature
chip_name = {
1: "ESP8285H08" if max_temp else "ESP8285N08",
2: "ESP8285H16" if max_temp else "ESP8285N16",
}.get(flash_size, "ESP8285")
return chip_name
return "ESP8266EX"
def get_chip_features(self):
features = ["WiFi"]
if "ESP8285" in self.get_chip_description():
features += ["Embedded Flash"]
return features
def flash_spi_attach(self, hspi_arg):
if self.IS_STUB:
super(ESP8266ROM, self).flash_spi_attach(hspi_arg)
else:
# ESP8266 ROM has no flash_spi_attach command in serial protocol,
# but flash_begin will do it
self.flash_begin(0, 0)
def flash_set_parameters(self, size):
# not implemented in ROM, but OK to silently skip for ROM
if self.IS_STUB:
super(ESP8266ROM, self).flash_set_parameters(size)
def chip_id(self):
"""
Read Chip ID from efuse - the equivalent of the SDK system_get_chip_id() func
"""
id0 = self.read_reg(self.ESP_OTP_MAC0)
id1 = self.read_reg(self.ESP_OTP_MAC1)
return (id0 >> 24) | ((id1 & 0xFFFFFF) << 8)
def read_mac(self, mac_type="BASE_MAC"):
"""Read MAC from OTP ROM"""
if mac_type != "BASE_MAC":
return None
mac0 = self.read_reg(self.ESP_OTP_MAC0)
mac1 = self.read_reg(self.ESP_OTP_MAC1)
mac3 = self.read_reg(self.ESP_OTP_MAC3)
if mac3 != 0:
oui = ((mac3 >> 16) & 0xFF, (mac3 >> 8) & 0xFF, mac3 & 0xFF)
elif ((mac1 >> 16) & 0xFF) == 0:
oui = (0x18, 0xFE, 0x34)
elif ((mac1 >> 16) & 0xFF) == 1:
oui = (0xAC, 0xD0, 0x74)
else:
raise FatalError("Unknown OUI")
return oui + ((mac1 >> 8) & 0xFF, mac1 & 0xFF, (mac0 >> 24) & 0xFF)
def get_erase_size(self, offset, size):
"""Calculate an erase size given a specific size in bytes.
Provides a workaround for the bootloader erase bug."""
sectors_per_block = 16
sector_size = self.FLASH_SECTOR_SIZE
num_sectors = (size + sector_size - 1) // sector_size
start_sector = offset // sector_size
head_sectors = sectors_per_block - (start_sector % sectors_per_block)
if num_sectors < head_sectors:
head_sectors = num_sectors
if num_sectors < 2 * head_sectors:
return (num_sectors + 1) // 2 * sector_size
else:
return (num_sectors - head_sectors) * sector_size
def override_vddsdio(self, new_voltage):
raise NotSupportedError(self, "Overriding VDDSDIO")
def check_spi_connection(self, spi_connection):
raise NotSupportedError(self, "Setting --spi-connection")
class ESP8266StubLoader(ESP8266ROM):
"""Access class for ESP8266 stub loader, runs on top of ROM."""
FLASH_WRITE_SIZE = 0x4000 # matches MAX_WRITE_BLOCK in stub_loader.c
IS_STUB = True
def __init__(self, rom_loader):
self.secure_download_mode = rom_loader.secure_download_mode
self._port = rom_loader._port
self._trace_enabled = rom_loader._trace_enabled
self.cache = rom_loader.cache
self.flush_input() # resets _slip_reader
def get_erase_size(self, offset, size):
return size # stub doesn't have same size bug as ROM loader
ESP8266ROM.STUB_CLASS = ESP8266StubLoader
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