[Marvell]: Add support for SLM5401-54x device (#1307)

* Marvell's updates for SONiC.201712 & SAI v1.0
* [Platform] Add Marvell's SLM5401-54x for branch 201712

device/marvell/x86_64-marvell_slm5401_54x-r0/SLM5401-54x/port_config.ini

@@ -0,0 +1,55 @@
+# name          lanes
+Ethernet0       0
+Ethernet1       1
+Ethernet2       2
+Ethernet3       3
+Ethernet4       4
+Ethernet5       5
+Ethernet6       6
+Ethernet7       7
+Ethernet8       8
+Ethernet9       9
+Ethernet10      10
+Ethernet11      11
+Ethernet12      12
+Ethernet13      13
+Ethernet14      14
+Ethernet15      15
+Ethernet16      16
+Ethernet17      17
+Ethernet18      18
+Ethernet19      19
+Ethernet20      20
+Ethernet21      21
+Ethernet22      22
+Ethernet23      23
+Ethernet24      24
+Ethernet25      25
+Ethernet26      26
+Ethernet27      27
+Ethernet28      28
+Ethernet29      29
+Ethernet30      30
+Ethernet31      31
+Ethernet32      32
+Ethernet33      33
+Ethernet34      34
+Ethernet35      35
+Ethernet36      36
+Ethernet37      37
+Ethernet38      38
+Ethernet39      39
+Ethernet40      40
+Ethernet41      41
+Ethernet42      42
+Ethernet43      43
+Ethernet44      44
+Ethernet45      45
+Ethernet46      46
+Ethernet47      47
+Ethernet48      48
+Ethernet49      49
+Ethernet50      50
+Ethernet51      51
+Ethernet52      52
+Ethernet53      53

device/marvell/x86_64-marvell_slm5401_54x-r0/SLM5401-54x/sai.profile

@@ -0,0 +1,2 @@
+mode=1
+hwId=slm5401-54x

device/marvell/x86_64-marvell_slm5401_54x-r0/installer.conf

@@ -0,0 +1,3 @@
+CONSOLE_PORT=0x2f8
+CONSOLE_DEV=1
+CONSOLE_SPEED=115200

device/marvell/x86_64-marvell_slm5401_54x-r0/plugins/eeprom.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python
+
+try:
+    import exceptions
+    import binascii
+    import time
+    import optparse
+    import warnings
+    import os
+    import sys
+    from sonic_eeprom import eeprom_base
+    from sonic_eeprom import eeprom_tlvinfo
+    import subprocess
+except ImportError, e:
+    raise ImportError (str(e) + "- required module not found")
+
+class board(eeprom_tlvinfo.TlvInfoDecoder):
+    _TLV_INFO_MAX_LEN = 256
+    def __init__(self, name, path, cpld_root, ro):
+        self.eeprom_path = "/sys/bus/i2c/devices/1-0057/eeprom"
+        #Two i2c buses might get flipped order, check them both.
+        if not os.path.exists(self.eeprom_path):
+            self.eeprom_path = "/sys/bus/i2c/devices/0-0057/eeprom"
+        super(board, self).__init__(self.eeprom_path, 0, '', True)

device/marvell/x86_64-marvell_slm5401_54x-r0/plugins/sfputil.py

@@ -0,0 +1,60 @@
+#!/usr/bin/env python
+
+try:
+    from sonic_sfp.sfputilbase import sfputilbase
+except ImportError, e:
+    raise ImportError (str(e) + "- required module not found")
+
+
+class sfputil(sfputilbase):
+    """Platform specific sfputil class"""
+
+    port_start = 0
+    port_end = 31
+    ports_in_block = 32
+
+    port_to_eeprom_mapping = {}
+    port_to_i2c_mapping = {
+         9 : 18,
+        10 : 19,
+        11 : 20,
+        12 : 21,
+         1 : 22,
+         2 : 23,
+         3 : 24,
+         4 : 25,
+         6 : 26,
+         5 : 27,
+         8 : 28,
+         7 : 29,
+        13 : 30,
+        14 : 31,
+        15 : 32,
+        16 : 33,
+        17 : 34,
+        18 : 35,
+        19 : 36,
+        20 : 37,
+        25 : 38,
+        26 : 39,
+        27 : 40,
+        28 : 41,
+        29 : 42,
+        30 : 43,
+        31 : 44,
+        32 : 45,
+        21 : 46,
+        22 : 47,
+        23 : 48,
+        24 : 49,
+    }
+
+    _qsfp_ports = range(0, ports_in_block + 1)
+
+    def __init__(self, port_num):
+        # Override port_to_eeprom_mapping for class initialization
+        eeprom_path = '/sys/bus/i2c/devices/{0}-0050/sfp_eeprom'
+        for x in range(self.port_start, self.port_end + 1):
+            port_eeprom_path = eeprom_path.format(self.port_to_i2c_mapping[x+1])
+            self.port_to_eeprom_mapping[x] = port_eeprom_path
+        sfputilbase.__init__(self, port_num)