[DELL][Z9100,S6100,S6000] Platform 2.0 SFP Changes (#3229)

* [DELL][Z9100,S6100,S6000] Platform 2.0 SFP Changes

Added support in sfp.py file which will be generic. Send the eeprom path and sfp_control path from chassis.py

platform/broadcom/sonic-platform-modules-dell/s6000/sonic_platform/__init__.py

@@ -1,2 +1,2 @@
-__all__ = ["platform", "chassis"]
+__all__ = ["platform", "chassis", "sfp"]
 from sonic_platform import *

platform/broadcom/sonic-platform-modules-dell/s6000/sonic_platform/chassis.py

@@ -10,6 +10,7 @@
 try:
     import os
     from sonic_platform_base.chassis_base import ChassisBase
+    from sonic_platform.sfp import Sfp
 except ImportError as e:
     raise ImportError(str(e) + "- required module not found")
 
@@ -26,7 +27,23 @@ class Chassis(ChassisBase):
     reset_reason_dict[0x6] = ChassisBase.REBOOT_CAUSE_NON_HARDWARE
 
     def __init__(self):
-        ChassisBase.__init__(self)
+        # Initialize SFP list
+        PORT_START = 0
+        PORT_END = 31
+        EEPROM_OFFSET = 20
+        PORTS_IN_BLOCK = (PORT_END + 1)
+
+        # sfp.py will read eeprom contents and retrive the eeprom data.
+        # It will also provide support sfp controls like reset and setting
+        # low power mode.
+        # We pass the eeprom path and sfp control path from chassis.py
+        # So that sfp.py implementation can be generic to all platforms
+        eeprom_base = "/sys/class/i2c-adapter/i2c-{0}/{0}-0050/eeprom"
+        sfp_control = "/sys/devices/platform/dell-s6000-cpld.0/"
+        for index in range(0, PORTS_IN_BLOCK):
+            eeprom_path = eeprom_base.format(index + EEPROM_OFFSET)
+            sfp_node = Sfp(index, 'QSFP', eeprom_path, sfp_control, index)
+            self._sfp_list.append(sfp_node)
 
     def get_register(self, reg_name):
         rv = 'ERR'

platform/broadcom/sonic-platform-modules-dell/s6000/sonic_platform/sfp.py

@@ -0,0 +1 @@
+../../s6100/sonic_platform/sfp.py

platform/broadcom/sonic-platform-modules-dell/s6100/sonic_platform/__init__.py

@@ -1,3 +1,3 @@
-__all__ = ["platform", "chassis", "fan", "psu"]
+__all__ = ["platform", "chassis", "fan", "psu", "sfp"]
 from sonic_platform import *
 

platform/broadcom/sonic-platform-modules-dell/s6100/sonic_platform/chassis.py

@@ -11,6 +11,7 @@
 try:
     import os
     from sonic_platform_base.chassis_base import ChassisBase
+    from sonic_platform.sfp import Sfp
     from sonic_platform.psu import Psu
     from sonic_platform.fan import Fan
     from eeprom import Eeprom
@@ -30,6 +31,39 @@ class Chassis(ChassisBase):
     HWMON_NODE = os.listdir(HWMON_DIR)[0]
     MAILBOX_DIR = HWMON_DIR + HWMON_NODE
 
+    PORT_START = 0
+    PORT_END = 63
+    PORTS_IN_BLOCK = (PORT_END + 1)
+    IOM1_PORT_START = 0
+    IOM2_PORT_START = 16
+    IOM3_PORT_START = 32
+    IOM4_PORT_START = 48
+
+    PORT_I2C_MAPPING = {}
+    # 0th Index = i2cLine, 1st Index = EepromIdx in i2cLine
+    EEPROM_I2C_MAPPING = {
+          # IOM 1
+           0: [6, 66],  1: [6, 67],  2: [6, 68],  3: [6, 69],
+           4: [6, 70],  5: [6, 71],  6: [6, 72],  7: [6, 73],
+           8: [6, 74],  9: [6, 75], 10: [6, 76], 11: [6, 77],
+          12: [6, 78], 13: [6, 79], 14: [6, 80], 15: [6, 81],
+          # IOM 2
+          16: [8, 50], 17: [8, 51], 18: [8, 52], 19: [8, 53],
+          20: [8, 54], 21: [8, 55], 22: [8, 56], 23: [8, 57],
+          24: [8, 58], 25: [8, 59], 26: [8, 60], 27: [8, 61],
+          28: [8, 62], 29: [8, 63], 30: [8, 64], 31: [8, 65],
+          # IOM 3
+          32: [7, 34], 33: [7, 35], 34: [7, 36], 35: [7, 37],
+          36: [7, 38], 37: [7, 39], 38: [7, 40], 39: [7, 41],
+          40: [7, 42], 41: [7, 43], 42: [7, 44], 43: [7, 45],
+          44: [7, 46], 45: [7, 47], 46: [7, 48], 47: [7, 49],
+          # IOM 4
+          48: [9, 18], 49: [9, 19], 50: [9, 20], 51: [9, 21],
+          52: [9, 22], 53: [9, 23], 54: [9, 24], 55: [9, 25],
+          56: [9, 26], 57: [9, 27], 58: [9, 28], 59: [9, 29],
+          60: [9, 30], 61: [9, 31], 62: [9, 32], 63: [9, 33]
+      }
+
     reset_reason_dict = {}
     reset_reason_dict[11] = ChassisBase.REBOOT_CAUSE_POWER_LOSS
     reset_reason_dict[33] = ChassisBase.REBOOT_CAUSE_WATCHDOG
@@ -55,6 +89,39 @@ def __init__(self):
             psu = Psu(i)
             self._psu_list.append(psu)
 
+        self._populate_port_i2c_mapping()
+
+        # sfp.py will read eeprom contents and retrive the eeprom data.
+        # It will also provide support sfp controls like reset and setting
+        # low power mode.
+        # We pass the eeprom path and sfp control path from chassis.py
+        # So that sfp.py implementation can be generic to all platforms
+        eeprom_base = "/sys/class/i2c-adapter/i2c-{0}/i2c-{1}/{1}-0050/eeprom"
+        sfp_ctrl_base = "/sys/class/i2c-adapter/i2c-{0}/{0}-003e/"
+        for index in range(0, self.PORTS_IN_BLOCK):
+            eeprom_path = eeprom_base.format(self.EEPROM_I2C_MAPPING[index][0],
+                                             self.EEPROM_I2C_MAPPING[index][1])
+            sfp_control = sfp_ctrl_base.format(self.PORT_I2C_MAPPING[index])
+            sfp_node = Sfp(index, 'QSFP', eeprom_path, sfp_control, index)
+            self._sfp_list.append(sfp_node)
+
+    def _populate_port_i2c_mapping(self):
+        # port_num and i2c match
+        for port_num in range(0, self.PORTS_IN_BLOCK):
+            if((port_num >= self.IOM1_PORT_START) and
+                    (port_num < self.IOM2_PORT_START)):
+                i2c_line = 14
+            elif((port_num >= self.IOM2_PORT_START) and
+                    (port_num < self.IOM3_PORT_START)):
+                i2c_line = 16
+            elif((port_num >= self.IOM3_PORT_START) and
+                    (port_num <self.IOM4_PORT_START)):
+                i2c_line = 15
+            elif((port_num >= self.IOM4_PORT_START) and
+                    (port_num < self.PORTS_IN_BLOCK)):
+                i2c_line = 17
+            self.PORT_I2C_MAPPING[port_num] = i2c_line
+
     def _get_pmc_register(self, reg_name):
         # On successful read, returns the value read from given
         # reg_name and on failure returns 'ERR'