sonic-buildimage/device/dell/x86_64-dell_s6100_c2538-r0/plugins/sfputil.py

# sfputil.py
#
# Platform-specific SFP transceiver interface for SONiC
#
#    +-i2c----+--------+
#    |    6  |   7     |
#    | +-------------+ |
#    | |IOM1  | IOM3 | |
#    | |IOM2  | IOM4 | |
#    | +-------------+ |
#    |   8    |   9    |
#    +--------+--------+


try:
    import time
    import os
    from sonic_sfp.sfputilbase import SfpUtilBase
except ImportError as e:
    raise ImportError("%s - required module not found" % str(e))


class SfpUtil(SfpUtilBase):
    """Platform-specific SfpUtil class"""

    PORT_START = 0
    PORT_END = 63
    PORTS_IN_BLOCK = 64

    _port_to_eeprom_mapping = {}
    _port_to_i2c_mapping = {
       0: [6, 18, 34, 50, 66],
       1: [6, 19, 35, 51, 67],
       2: [6, 20, 36, 52, 68],
       3: [6, 21, 37, 53, 69],
       4: [6, 22, 38, 54, 70],
       5: [6, 23, 39, 55, 71],
       6: [6, 24, 40, 56, 72],
       7: [6, 25, 41, 57, 73],
       8: [6, 26, 42, 58, 74],
       9: [6, 27, 43, 59, 75],
       10: [6, 28, 44, 60, 76],
       11: [6, 29, 45, 61, 77],
       12: [6, 30, 46, 62, 78],
       13: [6, 31, 47, 63, 79],
       14: [6, 32, 48, 64, 80],
       15: [6, 33, 49, 65, 81],
       16: [8, 18, 34, 50, 66],
       17: [8, 19, 35, 51, 67],
       18: [8, 20, 36, 52, 68],
       19: [8, 21, 37, 53, 69],
       20: [8, 22, 38, 54, 70],
       21: [8, 23, 39, 55, 71],
       22: [8, 24, 40, 56, 72],
       23: [8, 25, 41, 57, 73],
       24: [8, 26, 42, 58, 74],
       25: [8, 27, 43, 59, 75],
       26: [8, 28, 44, 60, 76],
       27: [8, 29, 45, 61, 77],
       28: [8, 30, 46, 62, 78],
       29: [8, 31, 47, 63, 79],
       30: [8, 32, 48, 64, 80],
       31: [8, 33, 49, 65, 81],
       32: [7, 18, 34, 50, 66],
       33: [7, 19, 35, 51, 67],
       34: [7, 20, 36, 52, 68],
       35: [7, 21, 37, 53, 69],
       36: [7, 22, 38, 54, 70],
       37: [7, 23, 39, 55, 71],
       38: [7, 24, 40, 56, 72],
       39: [7, 25, 41, 57, 73],
       40: [7, 26, 42, 58, 74],
       41: [7, 27, 43, 59, 75],
       42: [7, 28, 44, 60, 76],
       43: [7, 29, 45, 61, 77],
       44: [7, 30, 46, 62, 78],
       45: [7, 31, 47, 63, 79],
       46: [7, 32, 48, 64, 80],
       47: [7, 33, 49, 65, 81],
       48: [9, 18, 34, 50, 66],
       49: [9, 19, 35, 51, 67],
       50: [9, 20, 36, 52, 68],
       51: [9, 21, 37, 53, 69],
       52: [9, 22, 38, 54, 70],
       53: [9, 23, 39, 55, 71],
       54: [9, 24, 40, 56, 72],
       55: [9, 25, 41, 57, 73],
       56: [9, 26, 42, 58, 74],
       57: [9, 27, 43, 59, 75],
       58: [9, 28, 44, 60, 76],
       59: [9, 29, 45, 61, 77],
       60: [9, 30, 46, 62, 78],
       61: [9, 31, 47, 63, 79],
       62: [9, 32, 48, 64, 80],
       63: [9, 33, 49, 65, 81]
}

    IOM_1_PORT_START = 0
    IOM_1_PORT_END = 15

    IOM_2_PORT_START = 16
    IOM_2_PORT_END = 31

    IOM_3_PORT_START = 32
    IOM_3_PORT_END = 47

    IOM_4_PORT_START = 48
    IOM_4_PORT_END = 63

    BASE_VAL_PATH="/sys/class/i2c-adapter/i2c-{0}/{0}-003e/"


    @property
    def port_start(self):
        return self.PORT_START

    @property
    def port_end(self):
        return self.PORT_END

    @property
    def qsfp_ports(self):
        return range(0, self.PORTS_IN_BLOCK + 1)

    @property
    def iom1_port_start(self):
        return self.IOM_1_PORT_START

    @property
    def iom1_port_end(self):
        return self.IOM_1_PORT_END

    @property
    def iom2_port_start(self):
        return self.IOM_2_PORT_START

    @property
    def iom2_port_end(self):
        return self.IOM_2_PORT_END

    @property
    def iom3_port_start(self):
        return self.IOM_3_PORT_START

    @property
    def iom3_port_end(self):
        return self.IOM_3_PORT_END

    @property
    def iom4_port_start(self):
        return self.IOM_4_PORT_START

    @property
    def iom4_port_end(self):
        return self.IOM_4_PORT_END

    @property
    def port_to_eeprom_mapping(self):
        return self._port_to_eeprom_mapping

    @property
    def port_to_i2c_mapping(self):
        return self._port_to_i2c_mapping


    def __init__(self):
        eeprom_path = "/sys/class/i2c-adapter/i2c-{0}/i2c-{1}/{1}-0050/eeprom"
        global port_to_eeprom_path

        for port_num in range(0, self.port_end + 1):
                if port_num >= self.iom1_port_start and port_num <= self.iom1_port_end:
                    assigned=0
                    #i2c-6
                    for x in range(1,5):
                        port_to_eeprom_path = eeprom_path.format(self.port_to_i2c_mapping[port_num][0], self.port_to_i2c_mapping[port_num][x])
                        if ( os.path.isfile(port_to_eeprom_path) ):
                                self.port_to_eeprom_mapping[port_num]=port_to_eeprom_path
                                assigned=1
                        elif (not assigned):
                                self.port_to_eeprom_mapping[port_num]="No IOM"

                elif port_num >= self.iom2_port_start and port_num <= self.iom2_port_end:
                    assigned=0
                    #i2c-8
                    for x in range(1,5):
                        port_to_eeprom_path = eeprom_path.format(self.port_to_i2c_mapping[port_num][0], self.port_to_i2c_mapping[port_num][x])
                        if ( os.path.isfile(port_to_eeprom_path) ):
                                self.port_to_eeprom_mapping[port_num]=port_to_eeprom_path
                                assigned=1
                        elif (not assigned):
                                self.port_to_eeprom_mapping[port_num]="No IOM"

                elif port_num >= self.iom3_port_start and port_num <= self.iom3_port_end:
                    assigned=0
                    #i2c-7
                    for x in range(1,5):
                        port_to_eeprom_path = eeprom_path.format(self.port_to_i2c_mapping[port_num][0], self.port_to_i2c_mapping[port_num][x])
                        if ( os.path.isfile(port_to_eeprom_path) ):
                                self.port_to_eeprom_mapping[port_num]=port_to_eeprom_path
                                assigned=1
                        elif (not assigned):
                                self.port_to_eeprom_mapping[port_num]="No IOM"


                elif port_num >= self.iom4_port_start and port_num <= self.iom4_port_end:
                    assigned=0
                    #i2c-9
                    for x in range(1,5):
                        port_to_eeprom_path = eeprom_path.format(self.port_to_i2c_mapping[port_num][0], self.port_to_i2c_mapping[port_num][x])
                        if ( os.path.isfile(port_to_eeprom_path) ):
                                self.port_to_eeprom_mapping[port_num]=port_to_eeprom_path
                                assigned=1
                        elif (not assigned):
                                self.port_to_eeprom_mapping[port_num]="No IOM"

        SfpUtilBase.__init__(self)

    def get_presence(self, port_num):

        global i2c_line

        # Check for invalid port_num
        if port_num < self.port_start or port_num > self.port_end:
            return False

        #port_num and i2c match
        if port_num >= self.iom1_port_start and port_num <= self.iom1_port_end:
            i2c_line=14
        elif port_num >= self.iom2_port_start and port_num <= self.iom2_port_end:
            i2c_line=16
        elif port_num >= self.iom3_port_start and port_num <= self.iom3_port_end:
            i2c_line=15
        elif port_num >= self.iom4_port_start and port_num <= self.iom4_port_end:
            i2c_line=17

        try:
                qsfp_path = self.BASE_VAL_PATH.format(i2c_line)+"qsfp_modprs"
                reg_file = open(qsfp_path, "r")

        except IOError as e:
            print "Error: unable to open file: %s" % str(e)
            return False

        content = reg_file.readline().rstrip()

        #Absence of IOM throws read error
        if (content == 'read error'):
            return False

        # content is a string containing the hex representation of the register
        reg_value = int(content, 16)

        #Rationalize port settings
        if port_num > 15:
            port_num=port_num%16

        # Mask off the bit corresponding to our port
        mask = (1 << port_num)

        # ModPrsL is active low
        if reg_value & mask == 0:
            return True

        return False

    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

        #port_num and i2c match
        if port_num >= self.iom1_port_start and port_num <= self.iom1_port_end:
            i2c_line=14
        elif port_num >= self.iom2_port_start and port_num <= self.iom2_port_end:
            i2c_line=16
        elif port_num >= self.iom3_port_start and port_num <= self.iom3_port_end:
            i2c_line=15
        elif port_num >= self.iom4_port_start and port_num <= self.iom4_port_end:
            i2c_line=17

        try:
                qsfp_path = self.BASE_VAL_PATH.format(i2c_line)+"qsfp_lpmode"
                reg_file = open(qsfp_path, "r")

        except IOError as e:
            print "Error: unable to open file: %s" % str(e)
            return False

        content = reg_file.readline().rstrip()

        #Absence of IOM throws read error
        if (content == 'read error'):
            return False

        # content is a string containing the hex representation of the register
        reg_value = int(content, 16)

        #Rationalize port settings
        if port_num > 15:
            port_num=port_num%16

        # Mask off the bit corresponding to our port
        mask = (1 << port_num)

        # LPMode is active high
        if reg_value & mask == 0:
            return False

        return True

    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

        #port_num and i2c match
        if port_num >= self.iom1_port_start and port_num <= self.iom1_port_end:
            i2c_line=14
        elif port_num >= self.iom2_port_start and port_num <= self.iom2_port_end:
            i2c_line=16
        elif port_num >= self.iom3_port_start and port_num <= self.iom3_port_end:
            i2c_line=15
        elif port_num >= self.iom4_port_start and port_num <= self.iom4_port_end:
            i2c_line=17

        try:
                qsfp_path = self.BASE_VAL_PATH.format(i2c_line)+"qsfp_lpmode"
                reg_file = open(qsfp_path, "r+")

        except IOError as e:
            print "Error: unable to open file: %s" % str(e)
            return False

        content = reg_file.readline().rstrip()

        #Absence of IOM throws read error
        if (content == 'read error'):
            return False

        # content is a string containing the hex representation of the register
        reg_value = int(content, 16)

        #Rationalize port settings
        if port_num > 15:
            port_num=port_num%16

        # Mask off the bit corresponding to our port
        mask = (1 << port_num)

        # LPMode is active high; set or clear the bit accordingly
        if lpmode is True:
            reg_value = reg_value | mask
        else:
            reg_value = reg_value & ~mask

        # Convert our register value back to a hex string and write back
        content = hex(reg_value)

        reg_file.seek(0)
        reg_file.write(content)
        reg_file.close()

        return True

    def reset(self, port_num):

        global i2c_line

        # Check for invalid port_num
        if port_num < self.port_start or port_num > self.port_end:
            return False

        #port_num and i2c match
        if port_num >= self.iom1_port_start and port_num <= self.iom1_port_end:
            i2c_line=14
        elif port_num >= self.iom2_port_start and port_num <= self.iom2_port_end:
            i2c_line=16
        elif port_num >= self.iom3_port_start and port_num <= self.iom3_port_end:
            i2c_line=15
        elif port_num >= self.iom4_port_start and port_num <= self.iom4_port_end:
            i2c_line=17

        try:
                qsfp_path = self.BASE_VAL_PATH.format(i2c_line)+"qsfp_lpmode"
                reg_file = open(qsfp_path, "r+")

        except IOError as e:
            print "Error: unable to open file: %s" % str(e)
            return False

        content = reg_file.readline().rstrip()

	#Absence of IOM throws read error
        if (content == 'read error'):
	    print("it's empty");
            return False

        # File content is a string containing the hex representation of the register
        reg_value = int(content, 16)

	#Rationalize port settings
        if port_num > 15:
           port_num=port_num%16

        # Mask off the bit corresponding to our port
        mask = (1 << port_num)

        # ResetL is active low
        reg_value = reg_value & ~mask

        # Convert our register value back to a hex string and write back
        reg_file.seek(0)
        reg_file.write(hex(reg_value))
        reg_file.close()

        # Sleep 1 second to allow it to settle
        time.sleep(1)

        # Flip the bit back high and write back to the register to take port out of reset
        try:
                qsfp_path = self.BASE_VAL_PATH.format(i2c_line)+"qsfp_lpmode"
                reg_file = open(qsfp_path, "w")

        except IOError as e:
            print "Error: unable to open file: %s" % str(e)
            return False

        reg_value = reg_value | mask
        reg_file.seek(0)
        reg_file.write(hex(reg_value))
        reg_file.close()

        return True