188 lines
5.1 KiB
Python
188 lines
5.1 KiB
Python
#!/usr/bin/env python
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try:
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import time
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import string
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from ctypes import create_string_buffer
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from sonic_sfp.sfputilbase import SfpUtilBase
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except ImportError, e:
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raise ImportError (str(e) + "- required module not found")
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class SfpUtil(SfpUtilBase):
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"""Platform specific SfpUtill class"""
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_port_start = 0
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_port_end = 31
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ports_in_block = 32
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_port_to_eeprom_mapping = {}
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port_to_i2c_mapping = {
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9 : 18,
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10 : 19,
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11 : 20,
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12 : 21,
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1 : 22,
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2 : 23,
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3 : 24,
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4 : 25,
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6 : 26,
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5 : 27,
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8 : 28,
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7 : 29,
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13 : 30,
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14 : 31,
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15 : 32,
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16 : 33,
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17 : 34,
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18 : 35,
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19 : 36,
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20 : 37,
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25 : 38,
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26 : 39,
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27 : 40,
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28 : 41,
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29 : 42,
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30 : 43,
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31 : 44,
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32 : 45,
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21 : 46,
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22 : 47,
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23 : 48,
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24 : 49,
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}
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_qsfp_ports = range(0, ports_in_block + 1)
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def __init__(self):
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eeprom_path = '/sys/bus/i2c/devices/{0}-0050/eeprom'
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for x in range(0, self._port_end + 1):
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port_eeprom_path = eeprom_path.format(self.port_to_i2c_mapping[x+1])
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self._port_to_eeprom_mapping[x] = port_eeprom_path
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SfpUtilBase.__init__(self)
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def reset(self, port_num):
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# Check for invalid port_num
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if port_num < self._port_start or port_num > self._port_end:
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return False
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path = "/sys/bus/i2c/devices/4-0060/module_reset_{0}"
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port_ps = path.format(port_num+1)
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try:
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reg_file = open(port_ps, 'w')
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except IOError as e:
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print "Error: unable to open file: %s" % str(e)
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return False
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#toggle reset
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reg_file.seek(0)
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reg_file.write('1')
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time.sleep(1)
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reg_file.seek(0)
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reg_file.write('0')
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reg_file.close()
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return True
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def get_presence(self, port_num):
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# Check for invalid port_num
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if port_num < self._port_start or port_num > self._port_end:
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return False
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path = "/sys/bus/i2c/devices/4-0060/module_present_{0}"
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port_ps = path.format(port_num+1)
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try:
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reg_file = open(port_ps)
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except IOError as e:
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print "Error: unable to open file: %s" % str(e)
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return False
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reg_value = reg_file.readline().rstrip()
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if reg_value == '1':
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return True
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return False
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@property
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def port_start(self):
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return self._port_start
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@property
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def port_end(self):
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return self._port_end
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@property
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def qsfp_ports(self):
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return range(0, self.ports_in_block + 1)
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@property
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def port_to_eeprom_mapping(self):
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return self._port_to_eeprom_mapping
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def get_transceiver_change_event(self):
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"""
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TODO: This function need to be implemented
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when decide to support monitoring SFP(Xcvrd)
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on this platform.
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"""
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raise NotImplementedError
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def get_low_power_mode(self, port_num):
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# Check for invalid port_num
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if port_num < self._port_start or port_num > self._port_end:
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return False
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try:
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eeprom = None
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if not self.get_presence(port_num):
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return False
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eeprom = open(self.port_to_eeprom_mapping[port_num], "rb")
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eeprom.seek(93)
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lpmode = ord(eeprom.read(1))
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if ((lpmode & 0x3) == 0x3):
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return True # Low Power Mode if "Power override" bit is 1 and "Power set" bit is 1
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else:
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return False # High Power Mode if one of the following conditions is matched:
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# 1. "Power override" bit is 0
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# 2. "Power override" bit is 1 and "Power set" bit is 0
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except IOError as e:
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print "Error: unable to open file: %s" % str(e)
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return False
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finally:
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if eeprom is not None:
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eeprom.close()
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time.sleep(0.01)
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def set_low_power_mode(self, port_num, lpmode):
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# Check for invalid port_num
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if port_num < self._port_start or port_num > self._port_end:
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return False
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try:
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eeprom = None
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if not self.get_presence(port_num):
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return False # Port is not present, unable to set the eeprom
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# Fill in write buffer
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regval = 0x3 if lpmode else 0x1 # 0x3:Low Power Mode, 0x1:High Power Mode
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buffer = create_string_buffer(1)
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buffer[0] = chr(regval)
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# Write to eeprom
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eeprom = open(self.port_to_eeprom_mapping[port_num], "r+b")
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eeprom.seek(93)
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eeprom.write(buffer[0])
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return True
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except IOError as e:
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print "Error: unable to open file: %s" % str(e)
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return False
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finally:
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if eeprom is not None:
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eeprom.close()
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time.sleep(0.01) |