135 lines
3.9 KiB
Python
135 lines
3.9 KiB
Python
#! /usr/bin/python
|
|
|
|
try:
|
|
import time
|
|
import string
|
|
from ctypes import create_string_buffer
|
|
from sonic_sfp.sfputilbase import SfpUtilBase
|
|
except ImportError, e:
|
|
raise ImportError (str(e) + "- required module not found")
|
|
|
|
|
|
class SfpUtil(SfpUtilBase):
|
|
"""Platform specific sfputil class"""
|
|
|
|
_port_start = 0
|
|
_port_end = 31
|
|
ports_in_block = 32
|
|
|
|
|
|
_port_to_eeprom_mapping = {}
|
|
|
|
_qsfp_ports = range(0, ports_in_block + 1)
|
|
|
|
def __init__(self):
|
|
# Override port_to_eeprom_mapping for class initialization
|
|
eeprom_path = '/sys/bus/i2c/devices/{0}-0050/sfp_eeprom'
|
|
for x in range(self.port_start, self.port_end + 1):
|
|
self._port_to_eeprom_mapping[x] = eeprom_path.format(x + 18)
|
|
SfpUtilBase.__init__(self)
|
|
|
|
def reset(self, port_num):
|
|
raise NotImplementedError
|
|
|
|
def get_presence(self, port_num):
|
|
# Check for invalid port_num
|
|
if port_num < self._port_start or port_num > self._port_end:
|
|
return False
|
|
|
|
path = "/sys/bus/i2c/devices/{0}-0050/sfp_is_present"
|
|
port_ps = path.format(port_num+18)
|
|
|
|
|
|
try:
|
|
reg_file = open(port_ps)
|
|
except IOError as e:
|
|
print "Error: unable to open file: %s" % str(e)
|
|
return False
|
|
|
|
reg_value = reg_file.readline().rstrip()
|
|
if reg_value == '1':
|
|
return True
|
|
|
|
return False
|
|
|
|
@property
|
|
def port_start(self):
|
|
return self._port_start
|
|
|
|
@property
|
|
def port_end(self):
|
|
return self._port_end
|
|
|
|
@property
|
|
def qsfp_ports(self):
|
|
return range(0, self.ports_in_block + 1)
|
|
|
|
@property
|
|
def port_to_eeprom_mapping(self):
|
|
return self._port_to_eeprom_mapping
|
|
|
|
def get_transceiver_change_event(self):
|
|
"""
|
|
TODO: This function need to be implemented
|
|
when decide to support monitoring SFP(Xcvrd)
|
|
on this platform.
|
|
"""
|
|
raise NotImplementedError
|
|
|
|
def get_low_power_mode(self, port_num):
|
|
# Check for invalid port_num
|
|
if port_num < self._port_start or port_num > self._port_end:
|
|
return False
|
|
|
|
try:
|
|
eeprom = None
|
|
|
|
if not self.get_presence(port_num):
|
|
return False
|
|
|
|
eeprom = open(self.port_to_eeprom_mapping[port_num], "rb")
|
|
eeprom.seek(93)
|
|
lpmode = ord(eeprom.read(1))
|
|
|
|
if ((lpmode & 0x3) == 0x3):
|
|
return True # Low Power Mode if "Power override" bit is 1 and "Power set" bit is 1
|
|
else:
|
|
return False # High Power Mode if one of the following conditions is matched:
|
|
# 1. "Power override" bit is 0
|
|
# 2. "Power override" bit is 1 and "Power set" bit is 0
|
|
except IOError as e:
|
|
print "Error: unable to open file: %s" % str(e)
|
|
return False
|
|
finally:
|
|
if eeprom is not None:
|
|
eeprom.close()
|
|
time.sleep(0.01)
|
|
|
|
def set_low_power_mode(self, port_num, lpmode):
|
|
# Check for invalid port_num
|
|
if port_num < self._port_start or port_num > self._port_end:
|
|
return False
|
|
|
|
try:
|
|
eeprom = None
|
|
|
|
if not self.get_presence(port_num):
|
|
return False # Port is not present, unable to set the eeprom
|
|
|
|
# Fill in write buffer
|
|
regval = 0x3 if lpmode else 0x1 # 0x3:Low Power Mode, 0x1:High Power Mode
|
|
buffer = create_string_buffer(1)
|
|
buffer[0] = chr(regval)
|
|
|
|
# Write to eeprom
|
|
eeprom = open(self.port_to_eeprom_mapping[port_num], "r+b")
|
|
eeprom.seek(93)
|
|
eeprom.write(buffer[0])
|
|
return True
|
|
except IOError as e:
|
|
print "Error: unable to open file: %s" % str(e)
|
|
return False
|
|
finally:
|
|
if eeprom is not None:
|
|
eeprom.close()
|
|
time.sleep(0.01) |