170 lines
4.1 KiB
Python
170 lines
4.1 KiB
Python
# sfputil.py
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#
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# Platform-specific SFP transceiver interface for SONiC
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#
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try:
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import time
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from sonic_sfp.sfputilbase import SfpUtilBase
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except ImportError as e:
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raise ImportError("%s - required module not found" % str(e))
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class SfpUtil(SfpUtilBase):
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"""Platform-specific SfpUtil class"""
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PORT_START = 0
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PORT_END = 31
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PORTS_IN_BLOCK = 32
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_port_to_eeprom_mapping = {}
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port_to_i2c_mapping = {
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0: 22,
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1: 23,
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2: 24,
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3: 25,
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4: 26,
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5: 27,
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6: 28,
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7: 29,
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8: 30,
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9: 31,
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10: 32,
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11: 33,
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12: 34,
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13: 35,
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14: 36,
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15: 37,
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16: 6,
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17: 7,
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18: 8,
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19: 9,
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20: 10,
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21: 11,
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22: 12,
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23: 13,
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24: 14,
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25: 15,
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26: 16,
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27: 17,
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28: 18,
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29: 19,
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30: 20,
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31: 21
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}
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@property
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def port_start(self):
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return self.PORT_START
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@property
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def port_end(self):
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return self.PORT_END
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@property
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def qsfp_ports(self):
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return range(0, self.PORTS_IN_BLOCK + 1)
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@property
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def port_to_eeprom_mapping(self):
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return self._port_to_eeprom_mapping
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def __init__(self):
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eeprom_path = "/sys/class/i2c-adapter/i2c-{0}/{0}-0050/eeprom"
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for x in range(0, self.port_end + 1):
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port_eeprom_path = eeprom_path.format(self.port_to_i2c_mapping[x])
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self.port_to_eeprom_mapping[x] = port_eeprom_path
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SfpUtilBase.__init__(self)
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def get_presence(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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reg_file = open("/sys/class/swps/port"+str(port_num)+"/present")
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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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reg_value = int(reg_file.readline().rstrip())
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if reg_value == 0:
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return True
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return False
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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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reg_file = open("/sys/class/swps/port"+str(port_num)+"/lpmod")
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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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reg_value = int(reg_file.readline().rstrip())
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if reg_value == 0:
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return False
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return True
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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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reg_file = open("/sys/class/swps/port"+str(port_num)+"/lpmod", "r+")
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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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reg_value = int(reg_file.readline().rstrip())
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# LPMode is active high; set or clear the bit accordingly
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if lpmode is True:
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reg_value = 1
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else:
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reg_value = 0
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reg_file.write(hex(reg_value))
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reg_file.close()
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return True
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def reset(self, port_num):
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QSFP_RESET_REGISTER_DEVICE_FILE = "/sys/class/swps/port"+str(port_num)+"/reset"
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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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reg_file = open(QSFP_RESET_REGISTER_DEVICE_FILE, "r+")
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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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reg_value = 0
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reg_file.write(hex(reg_value))
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reg_file.close()
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# Sleep 2 second to allow it to settle
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time.sleep(2)
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# Flip the value back write back to the register to take port out of reset
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try:
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reg_file = open(QSFP_RESET_REGISTER_DEVICE_FILE, "r+")
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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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reg_value = 1
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reg_file.write(hex(reg_value))
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reg_file.close()
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return True
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