sonic-buildimage/device/delta/x86_64-delta_ag9064-r0/plugins/sfputil.py

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# sfputil.py
#
# Platform-specific SFP transceiver interface for SONiC
#
try:
import time
from sonic_sfp.sfputilbase import SfpUtilBase
except ImportError as e:
raise ImportError("%s - required module not found" % str(e))
class SfpUtil(SfpUtilBase):
"""Platform-specific SfpUtil class"""
PORT_START = 0
PORT_END = 63
PORTS_IN_BLOCK = 64
EEPROM_OFFSET = 20
_port_to_eeprom_mapping = {}
@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 __init__(self):
eeprom_path = "/sys/class/i2c-adapter/i2c-{0}/{0}-0050/eeprom"
for x in range(0, self.port_end + 1):
self._port_to_eeprom_mapping[x] = eeprom_path.format(x + self.EEPROM_OFFSET)
SfpUtilBase.__init__(self)
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
try:
reg_file = open("/sys/devices/platform/delta-ag9064-cpld.0/qsfp_present")
except IOError as e:
print "Error: unable to open file: %s" % str(e)
return False
content = reg_file.readline().rstrip()
# content is a string containing the hex representation of the register
reg_value = int(content, 16)
# Mask off the bit corresponding to our port
mask = (1 << port_num)
# ModPrsL is active low
if reg_value & mask == 0:
return True
return False
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:
reg_file = open("/sys/devices/platform/delta-ag9064-cpld.0/qsfp_lpmode")
except IOError as e:
print "Error: unable to open file: %s" % str(e)
content = reg_file.readline().rstrip()
# content is a string containing the hex representation of the register
reg_value = int(content, 16)
# Mask off the bit corresponding to our port
mask = (1 << port_num)
# LPMode is active high
if reg_value & mask == 0:
return False
return True
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:
reg_file = open("/sys/devices/platform/delta-ag9064-cpld.0/qsfp_lpmode", "r+")
except IOError as e:
print "Error: unable to open file: %s" % str(e)
return False
content = reg_file.readline().rstrip()
# content is a string containing the hex representation of the register
reg_value = int(content, 16)
# Mask off the bit corresponding to our port
mask = (1 << port_num)
# LPMode is active high; set or clear the bit accordingly
if lpmode is True:
reg_value = reg_value | mask
else:
reg_value = reg_value & ~mask
# Convert our register value back to a hex string and write back
content = hex(reg_value).rstrip("L") or "0"
reg_file.seek(0)
reg_file.write(content)
reg_file.close()
return True
def reset(self, port_num):
QSFP_RESET_REGISTER_DEVICE_FILE = "/sys/devices/platform/delta-ag9064-cpld.0/qsfp_reset"
# Check for invalid port_num
if port_num < self.port_start or port_num > self.port_end:
return False
try:
reg_file = open(QSFP_RESET_REGISTER_DEVICE_FILE, "r+")
except IOError as e:
print "Error: unable to open file: %s" % str(e)
return False
content = reg_file.readline().rstrip()
# File content is a string containing the hex representation of the register
reg_value = int(content, 16)
# Mask off the bit corresponding to our port
mask = (1 << port_num)
# ResetL is active low
reg_value = reg_value & ~mask
# Convert our register value back to a hex string and write back
reg_file.seek(0)
reg_file.write(hex(reg_value))
reg_file.close()
# Sleep 1 second to allow it to settle
time.sleep(1)
# Flip the bit back high and write back to the register to take port out of reset
try:
reg_file = open(QSFP_RESET_REGISTER_DEVICE_FILE, "w")
except IOError as e:
print "Error: unable to open file: %s" % str(e)
return False
reg_value = reg_value | mask
reg_file.seek(0)
reg_file.write(hex(reg_value))
reg_file.close()
return True