[devices]: Add lpmode in sfputil.py for Accton AS7512 (#3005)
Signed-off-by: brandon_chuang <brandon_chuang@edge-core.com>
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@ -1,7 +1,10 @@
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#! /usr/bin/python
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#! /usr/bin/python
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try:
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try:
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from sonic_sfp.sfputilbase import SfpUtilBase
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import time
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import string
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from ctypes import create_string_buffer
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from sonic_sfp.sfputilbase import SfpUtilBase
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except ImportError, e:
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except ImportError, e:
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raise ImportError (str(e) + "- required module not found")
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raise ImportError (str(e) + "- required module not found")
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@ -26,13 +29,7 @@ class SfpUtil(SfpUtilBase):
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SfpUtilBase.__init__(self)
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SfpUtilBase.__init__(self)
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def reset(self, port_num):
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def reset(self, port_num):
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raise NotImplementedErro
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raise NotImplementedError
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def set_low_power_mode(self, port_nuM, lpmode):
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raise NotImplementedErro
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def get_low_power_mode(self, port_num):
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raise NotImplementedErro
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def get_presence(self, port_num):
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def get_presence(self, port_num):
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# Check for invalid port_num
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# Check for invalid port_num
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@ -78,3 +75,61 @@ class SfpUtil(SfpUtilBase):
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on this platform.
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on this platform.
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"""
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"""
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raise NotImplementedError
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raise NotImplementedError
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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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try:
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eeprom = None
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if not self.get_presence(port_num):
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return False
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eeprom = open(self.port_to_eeprom_mapping[port_num], "rb")
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eeprom.seek(93)
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lpmode = ord(eeprom.read(1))
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if ((lpmode & 0x3) == 0x3):
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return True # Low Power Mode if "Power override" bit is 1 and "Power set" bit is 1
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else:
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return False # High Power Mode if one of the following conditions is matched:
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# 1. "Power override" bit is 0
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# 2. "Power override" bit is 1 and "Power set" bit is 0
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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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finally:
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if eeprom is not None:
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eeprom.close()
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time.sleep(0.01)
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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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try:
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eeprom = None
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if not self.get_presence(port_num):
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return False # Port is not present, unable to set the eeprom
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# Fill in write buffer
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regval = 0x3 if lpmode else 0x1 # 0x3:Low Power Mode, 0x1:High Power Mode
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buffer = create_string_buffer(1)
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buffer[0] = chr(regval)
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# Write to eeprom
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eeprom = open(self.port_to_eeprom_mapping[port_num], "r+b")
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eeprom.seek(93)
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eeprom.write(buffer[0])
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return True
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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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finally:
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if eeprom is not None:
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eeprom.close()
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time.sleep(0.01)
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