115 lines
3.2 KiB
Python
115 lines
3.2 KiB
Python
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#!/usr/bin/env python
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#############################################################################
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# Celestica Seastone-DX010
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#
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# Platform and model specific eeprom subclass, inherits from the base class,
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# and provides the followings:
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# - the eeprom format definition
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# - specific encoder/decoder if there is special need
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#############################################################################
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try:
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import glob
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import os
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import sys
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import imp
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import re
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from array import array
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from cStringIO import StringIO
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from sonic_platform_base.sonic_eeprom import eeprom_dts
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from sonic_platform_base.sonic_eeprom import eeprom_tlvinfo
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except ImportError, e:
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raise ImportError(str(e) + "- required module not found")
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CACHE_ROOT = '/var/cache/sonic/decode-syseeprom'
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CACHE_FILE = 'syseeprom_cache'
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class Tlv(eeprom_tlvinfo.TlvInfoDecoder):
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EEPROM_DECODE_HEADLINES = 6
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def __init__(self):
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self._eeprom_path = "/sys/class/i2c-adapter/i2c-12/12-0050/eeprom"
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super(Tlv, self).__init__(self._eeprom_path, 0, '', True)
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self._eeprom = self._load_eeprom()
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def __parse_output(self, decode_output):
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decode_output.replace('\0', '')
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lines = decode_output.split('\n')
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lines = lines[self.EEPROM_DECODE_HEADLINES:]
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_eeprom_info_dict = dict()
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for line in lines:
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try:
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match = re.search(
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'(0x[0-9a-fA-F]{2})([\s]+[\S]+[\s]+)([\S]+)', line)
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if match is not None:
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idx = match.group(1)
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value = match.group(3).rstrip('\0')
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_eeprom_info_dict[idx] = value
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except:
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pass
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return _eeprom_info_dict
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def _load_eeprom(self):
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original_stdout = sys.stdout
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sys.stdout = StringIO()
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err = self.read_eeprom_db()
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if err:
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# Failed to read EEPROM information from database. Read from cache file
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pass
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else:
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decode_output = sys.stdout.getvalue()
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sys.stdout = original_stdout
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return self.__parse_output(decode_output)
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status = self.check_status()
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if status <> 'ok':
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return False
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if not os.path.exists(CACHE_ROOT):
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try:
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os.makedirs(CACHE_ROOT)
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except:
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pass
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#
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# only the eeprom classes that inherit from eeprom_base
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# support caching. Others will work normally
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#
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try:
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self.set_cache_name(os.path.join(CACHE_ROOT, CACHE_FILE))
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except:
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pass
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e = self.read_eeprom()
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if e is None:
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return 0
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try:
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self.update_cache(e)
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except:
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pass
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self.decode_eeprom(e)
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decode_output = sys.stdout.getvalue()
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sys.stdout = original_stdout
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(is_valid, valid_crc) = self.is_checksum_valid(e)
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if not is_valid:
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return False
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return self.__parse_output(decode_output)
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def get_eeprom(self):
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return self._eeprom
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def get_serial(self):
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return self._eeprom.get('0x23', "Undefined.")
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def get_mac(self):
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return self._eeprom.get('0x24', "Undefined.")
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