scan.py

import os
import struct

SMN_INDEX_REG = 0x60
SMN_DATA_REG = 0x64

SMN_MSG_REG = 0x3b10a20
SMN_RSP_REG = 0x3b10a80
SMN_ARG_REG = 0x3b10a88

SMN_STATUS_OK = 1

SKIP_COMMANDS = []

config = os.open('/sys/devices/pci0000:00/0000:00:00.0/config', os.O_RDWR)


def smn_read(address):
    os.pwrite(config, struct.pack('I', address), SMN_INDEX_REG)
    return struct.unpack('I', os.pread(config, 4, SMN_DATA_REG))[0]


def smn_write(address, data):
    os.pwrite(config, struct.pack('I', address), SMN_INDEX_REG)
    os.pwrite(config, struct.pack('I', data), SMN_DATA_REG)


def smn_send_msg(msg, *args):
    status = 0
    smn_write(SMN_RSP_REG, status)

    for j, arg in enumerate(args):
        smn_write(SMN_ARG_REG + (j << 2), arg)

    smn_write(SMN_MSG_REG, msg)

    while (status := smn_read(SMN_RSP_REG)) == 0:
        pass

    if status != SMN_STATUS_OK:
        return [status]

    return [smn_read(SMN_ARG_REG + (k << 2)) for k in range(5)]


for i in range(1, 192):
    if i not in SKIP_COMMANDS:
        r = [hex(v) for v in smn_send_msg(i, 0, 0)]
        print(f'{i:02x}: {r}')

os.close(config)