#!/opt/homebrew/bin/python3.11
import sys, struct, zlib, hexdump, tqdm
import crcmod

CRC32 = crcmod.mkCrcFun(0x104C11DB7, 0, 0)

data = bytearray(open(sys.argv[1], 'rb').read())

print('At 0x20000:')
header = data[0x20000:0x20020]
hexdump.hexdump(header)
print()

u32ROM_START, u32RAM_START, u32RAM_END, u32ROM_END, _, u32CRC32_SW = \
  struct.unpack('<6L', header[0:0x18])
print(f'u32ROM_START: 0x{u32ROM_START:08x}')
print(f'u32RAM_START: 0x{u32RAM_START:08x}')
print(f'u32RAM_END:   0x{u32RAM_END:08x}

$ venv/bin/python3 spi_crc_brute.py samsung-un40h5003af.bin | tee spi_crc_brute.log
At 0x20000:
00000000: 80 00 02 00 00 00 20 00  25

$ ./builddir/flashrom -p ft2232_spi:type=2232H,port=B,divisor=100 -c W25Q32FV --wp-status
flashrom v1.5.0-rc1 (git:v1.5.0-rc1) on Darwin 23.6.0 (arm64)
...
Protection range: start=0x00000000 length=0x00400000 (all)
Protection mode: hardware


$ ./builddir/flashrom

$ flashrom -p ft2232_spi:type=2232H,port=B,divisor=100 -w T-MXL1JAUSC-4mb.bin
flashrom v1.3.0 on Darwin 23.6.0 (arm64)
flashrom is free software, get the source code at https://flashrom.org

Calibrating delay