255 lines
7.1 KiB
Python
255 lines
7.1 KiB
Python
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# sfputil.py
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#
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# Platform-specific SFP transceiver interface for SONiC
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#
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try:
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import time
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import string
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import pprint
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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 as e:
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raise ImportError("%s - required module not found" % str(e))
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#from xcvrd
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SFP_STATUS_REMOVED = '0'
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SFP_STATUS_INSERTED = '1'
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class SfpUtil(SfpUtilBase):
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"""Platform-specific SfpUtil class"""
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PORT_START = 1
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PORT_END = 27
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PORTS_IN_BLOCK = 27
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QSFP_PORT_START = 25
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QSFP_PORT_END = 27
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BASE_VAL_PATH = "/sys/class/i2c-adapter/i2c-{0}/{1}-0050/"
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_port_to_is_present = {}
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_port_to_lp_mode = {}
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_port_to_eeprom_mapping = {}
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_cpld_mapping = [ "8-0063", "7-0064"]
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_port_to_i2c_mapping = {
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1: 26,
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2: 27,
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3: 28,
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4: 29,
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5: 30,
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6: 31,
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7: 32,
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8: 33,
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9: 34,
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10: 35,
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11: 36,
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12: 37,
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13: 38,
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14: 39,
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15: 40,
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16: 41,
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17: 42,
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18: 43,
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19: 44,
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20: 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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25: 21, #QSFP
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26: 22,
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27: 23,
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}
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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_port_start(self):
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return self.QSFP_PORT_START
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@property
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def qsfp_port_end(self):
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return self.QSFP_PORT_END
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@property
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def qsfp_ports(self):
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return range(self.QSFP_PORT_START, 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 __init__(self):
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eeprom_path = '/sys/bus/i2c/devices/{0}-0050/eeprom'
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for x in range(self.port_start, self.port_end+1):
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self.port_to_eeprom_mapping[x] = eeprom_path.format(
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self._port_to_i2c_mapping[x])
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self.get_transceiver_change_event()
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SfpUtilBase.__init__(self)
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def get_cpld_num(self, port_num):
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cpld_i = 0
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if (port_num >= self.qsfp_port_start):
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cpld_i = 1
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return cpld_i
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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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cpld_i = self.get_cpld_num(port_num)
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cpld_ps = self._cpld_mapping[cpld_i]
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path = "/sys/bus/i2c/devices/{0}/present_{1}"
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index = ((port_num-1)%24) +1
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port_ps = path.format(cpld_ps, index)
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try:
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val_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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content = val_file.readline().rstrip()
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val_file.close()
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# content is a string, either "0" or "1"
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if content == "1":
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return True
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return False
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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.qsfp_port_start or port_num > self.qsfp_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.qsfp_port_start or port_num > self.qsfp_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)
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def reset(self, port_num):
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raise NotImplementedError
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@property
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def _get_present_bitmap(self):
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nodes = []
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port_num = [24,3]
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path = "/sys/bus/i2c/devices/{0}/"
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cpld_path = path.format(self._cpld_mapping[0])
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nodes.append((cpld_path + "module_present_all", port_num[0]))
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cpld_path = path.format(self._cpld_mapping[1])
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nodes.append((cpld_path + "module_present_all", port_num[1]))
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bitmap = []
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for node in nodes:
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try:
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reg_file = open(node[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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cpld_bm = reg_file.readline().rstrip().zfill(node[1]/4)
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bitmap.append(cpld_bm)
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reg_file.close()
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rev = "".join(bitmap[::-1])
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return int(rev,16)
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data = {'valid':0, 'last':0, 'present':0}
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def get_transceiver_change_event(self, timeout=2000):
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now = time.time()
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port_dict = {}
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port = 0
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if timeout < 1000:
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timeout = 1000
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timeout = (timeout) / float(1000) # Convert to secs
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if now < (self.data['last'] + timeout) and self.data['valid']:
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return True, {}
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reg_value = self._get_present_bitmap
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changed_ports = self.data['present'] ^ reg_value
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if changed_ports:
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for port in range (self.port_start, self.port_end+1):
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# Mask off the bit corresponding to our port
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mask = (1 << (port - 1))
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if changed_ports & mask:
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if (reg_value & mask) == 0:
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port_dict[port] = SFP_STATUS_REMOVED
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else:
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port_dict[port] = SFP_STATUS_INSERTED
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# Update cache
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self.data['present'] = reg_value
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self.data['last'] = now
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self.data['valid'] = 1
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pprint.pprint(port_dict)
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return True, port_dict
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else:
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return True, {}
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return False, {}
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