|
5 | 5 |
|
6 | 6 | try:
|
7 | 7 | import time
|
| 8 | + import string |
| 9 | + from ctypes import create_string_buffer |
8 | 10 | from sonic_sfp.sfputilbase import SfpUtilBase
|
9 | 11 | except ImportError as e:
|
10 | 12 | raise ImportError("%s - required module not found" % str(e))
|
@@ -110,11 +112,63 @@ def get_presence(self, port_num):
|
110 | 112 |
|
111 | 113 | return False
|
112 | 114 |
|
113 |
| - def get_low_power_mode(self, port_num): |
114 |
| - raise NotImplementedError |
115 |
| - |
116 |
| - def set_low_power_mode(self, port_num, lpmode): |
117 |
| - raise NotImplementedError |
| 115 | + def get_low_power_mode(self, port_num): |
| 116 | + # Check for invalid port_num |
| 117 | + if port_num < self.port_start or port_num > self.port_end: |
| 118 | + return False |
| 119 | + |
| 120 | + try: |
| 121 | + eeprom = None |
| 122 | + |
| 123 | + if not self.get_presence(port_num): |
| 124 | + return False |
| 125 | + |
| 126 | + eeprom = open(self.port_to_eeprom_mapping[port_num], "rb") |
| 127 | + eeprom.seek(93) |
| 128 | + lpmode = ord(eeprom.read(1)) |
| 129 | + |
| 130 | + if ((lpmode & 0x3) == 0x3): |
| 131 | + return True # Low Power Mode if "Power override" bit is 1 and "Power set" bit is 1 |
| 132 | + else: |
| 133 | + return False # High Power Mode if one of the following conditions is matched: |
| 134 | + # 1. "Power override" bit is 0 |
| 135 | + # 2. "Power override" bit is 1 and "Power set" bit is 0 |
| 136 | + except IOError as e: |
| 137 | + print "Error: unable to open file: %s" % str(e) |
| 138 | + return False |
| 139 | + finally: |
| 140 | + if eeprom is not None: |
| 141 | + eeprom.close() |
| 142 | + time.sleep(0.01) |
| 143 | + |
| 144 | + def set_low_power_mode(self, port_num, lpmode): |
| 145 | + # Check for invalid port_num |
| 146 | + if port_num < self.port_start or port_num > self.port_end: |
| 147 | + return False |
| 148 | + |
| 149 | + try: |
| 150 | + eeprom = None |
| 151 | + |
| 152 | + if not self.get_presence(port_num): |
| 153 | + return False # Port is not present, unable to set the eeprom |
| 154 | + |
| 155 | + # Fill in write buffer |
| 156 | + regval = 0x3 if lpmode else 0x1 # 0x3:Low Power Mode, 0x1:High Power Mode |
| 157 | + buffer = create_string_buffer(1) |
| 158 | + buffer[0] = chr(regval) |
| 159 | + |
| 160 | + # Write to eeprom |
| 161 | + eeprom = open(self.port_to_eeprom_mapping[port_num], "r+b") |
| 162 | + eeprom.seek(93) |
| 163 | + eeprom.write(buffer[0]) |
| 164 | + return True |
| 165 | + except IOError as e: |
| 166 | + print "Error: unable to open file: %s" % str(e) |
| 167 | + return False |
| 168 | + finally: |
| 169 | + if eeprom is not None: |
| 170 | + eeprom.close() |
| 171 | + time.sleep(0.01) |
118 | 172 |
|
119 | 173 | def reset(self, port_num):
|
120 | 174 | if port_num < self.port_start or port_num > self.port_end:
|
|
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