[devices]: Add lpmode in sfputil.py for Accton AS7716-32X (#3039)

Signed-off-by: brandon_chuang <brandon_chuang@edge-core.com>
This commit is contained in:
brandonchuang 2019-07-03 21:49:38 +08:00 committed by lguohan
parent 810bc0d2ed
commit 206ca1b092

View File

@ -5,6 +5,8 @@
try:
import time
import string
from ctypes import create_string_buffer
from sonic_sfp.sfputilbase import SfpUtilBase
except ImportError as e:
raise ImportError("%s - required module not found" % str(e))
@ -108,11 +110,63 @@ class SfpUtil(SfpUtilBase):
return False
def get_low_power_mode(self, port_num):
raise NotImplementedError
def set_low_power_mode(self, port_num, lpmode):
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)
def reset(self, port_num):
if port_num < self.port_start or port_num > self.port_end: