65 lines
1.7 KiB
Python
65 lines
1.7 KiB
Python
#!/usr/bin/python3
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# SPDX-License-Identifier: GPL-2.0
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import ctypes
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import os
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DBC_UID_SIZE = 16
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DBC_NONCE_SIZE = 16
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DBC_SIG_SIZE = 32
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PARAM_GET_FMAX_CAP = (0x3,)
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PARAM_SET_FMAX_CAP = (0x4,)
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PARAM_GET_PWR_CAP = (0x5,)
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PARAM_SET_PWR_CAP = (0x6,)
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PARAM_GET_GFX_MODE = (0x7,)
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PARAM_SET_GFX_MODE = (0x8,)
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PARAM_GET_CURR_TEMP = (0x9,)
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PARAM_GET_FMAX_MAX = (0xA,)
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PARAM_GET_FMAX_MIN = (0xB,)
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PARAM_GET_SOC_PWR_MAX = (0xC,)
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PARAM_GET_SOC_PWR_MIN = (0xD,)
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PARAM_GET_SOC_PWR_CUR = (0xE,)
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DEVICE_NODE = "/dev/dbc"
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lib = ctypes.CDLL("./dbc_library.so", mode=ctypes.RTLD_GLOBAL)
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def handle_error(code):
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raise OSError(code, os.strerror(code))
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def get_nonce(device, signature):
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if not device:
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raise ValueError("Device required")
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buf = ctypes.create_string_buffer(DBC_NONCE_SIZE)
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ret = lib.get_nonce(device.fileno(), ctypes.byref(buf), signature)
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if ret:
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handle_error(ret)
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return buf.value
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def set_uid(device, new_uid, signature):
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if not signature:
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raise ValueError("Signature required")
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if not new_uid:
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raise ValueError("UID required")
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ret = lib.set_uid(device.fileno(), new_uid, signature)
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if ret:
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handle_error(ret)
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return True
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def process_param(device, message, signature, data=None):
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if not signature:
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raise ValueError("Signature required")
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if type(message) != tuple:
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raise ValueError("Expected message tuple")
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arg = ctypes.c_int(data if data else 0)
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sig = ctypes.create_string_buffer(signature, len(signature))
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ret = lib.process_param(device.fileno(), message[0], ctypes.pointer(sig), ctypes.pointer(arg))
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if ret:
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handle_error(ret)
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return arg.value, sig.value
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