191 lines
5.0 KiB
Python
191 lines
5.0 KiB
Python
# 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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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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class SfpUtil(SfpUtilBase):
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"""Platform-specific SfpUtil 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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EEPROM_OFFSET = 10
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_port_to_eeprom_mapping = {}
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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 __init__(self):
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eeprom_path = "/sys/class/i2c-adapter/i2c-{0}/{0}-0050/eeprom"
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for x in range(0, self.port_end + 1):
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self._port_to_eeprom_mapping[x] = eeprom_path.format(x + self.EEPROM_OFFSET)
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SfpUtilBase.__init__(self)
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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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if port_num > 16:
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cpld_addr=33
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else:
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cpld_addr=32
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file_path="/sys/bus/i2c/devices/1-00" + str(cpld_addr) + "/port" + str(port_num) + "/port" + str(port_num) + "_present"
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try:
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reg_file = open("file_path")
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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 = reg_file.readline().rstrip()
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# content is a string containing the hex representation of the register
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reg_value = int(content, 16)
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# ModPrsL is active low
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if reg_value == 0:
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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.port_start or port_num > self.port_end:
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return False
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if port_num > 16:
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cpld_addr=33
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else:
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cpld_addr=32
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file_path="/sys/bus/i2c/devices/1-00" + str(cpld_addr) + "/port" + str(port_num) + "/port" + str(port_num) + "_lpmode"
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try:
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reg_file = open(file_path)
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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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content = reg_file.readline().rstrip()
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# content is a string containing the hex representation of the register
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reg_value = int(content, 16)
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# LPMode is active high
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if reg_value == 0:
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return False
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return True
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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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if port_num > 16:
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cpld_addr=33
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else:
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cpld_addr=32
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file_path="/sys/bus/i2c/devices/1-00" + str(cpld_num) + "/port" + str(port_num) + "/port" + str(port_num) + "_lpmode"
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try:
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reg_file = open(file_path, "r+")
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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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# LPMode is active high; set or clear the bit accordingly
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if lpmode is True:
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reg_value = 1
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else:
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reg_value = 0
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# Convert our register value back to a hex string and write back
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content = hex(reg_value)
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reg_file.seek(0)
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reg_file.write(content)
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reg_file.close()
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return True
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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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if port_num > 16:
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cpld_addr=33
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else:
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cpld_addr=32
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file_path="/sys/bus/i2c/devices/1-00" + str(cpld_num) + "/port" + str(port_num) + "/port" + str(port_num) + "_rst"
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try:
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reg_file = open(file_path, "r+")
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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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# ResetL is active low
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reg_value = 0
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# Convert our register value back to a hex string and write back
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reg_file.seek(0)
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reg_file.write(hex(reg_value))
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reg_file.close()
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# Sleep 1 second to allow it to settle
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time.sleep(1)
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# Flip the bit back high and write back to the register to take port out of reset
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try:
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reg_file = open(QSFP_RESET_REGISTER_DEVICE_FILE, "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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reg_value = 1
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reg_file.seek(0)
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reg_file.write(hex(reg_value))
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reg_file.close()
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return True
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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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