[as9716-32d] Add to support lpmode for sfputil (#5171)

Implement code to set/get lpmode for as9716-32d platform
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jostar-yang 2020-08-14 02:19:14 +08:00 committed by GitHub
parent 6f9acee89b
commit e87de49ecb
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@ -7,6 +7,7 @@ try:
import time import time
import os import os
import sys, getopt import sys, getopt
from ctypes import create_string_buffer
from sonic_sfp.sfputilbase import SfpUtilBase from sonic_sfp.sfputilbase import SfpUtilBase
except ImportError as e: except ImportError as e:
raise ImportError("%s - required module not found" % str(e)) raise ImportError("%s - required module not found" % str(e))
@ -115,10 +116,65 @@ class SfpUtil(SfpUtilBase):
return False return False
def get_low_power_mode(self, port_num): def get_low_power_mode(self, port_num):
raise NotImplementedError # 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): def set_low_power_mode(self, port_num, lpmode):
raise NotImplementedError # 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
# 0x3:Low Power Mode. "Power override" bit is 1 and "Power set" bit is 1
# 0x9:High Power Mode. "Power override" bit is 1 ,"Power set" bit is 0 and "High Power Class Enable" bit is 1
regval = 0x3 if lpmode else 0x9
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)
def reset(self, port_num): def reset(self, port_num):
if port_num < self.port_start or port_num > self.port_end: if port_num < self.port_start or port_num > self.port_end: