Fix IR3570A issue that cause read eeprom problem

packages/platforms/accton/x86-64/x86-64-accton-as9716_32d/platform-config/r0/src/python/x86_64_accton_as9716_32d_r0/__init__.py

@@ -1,6 +1,33 @@
 from onl.platform.base import *
 from onl.platform.accton import *
 
+import commands
+
+#IR3570A chip casue problem when read eeprom by i2c-block mode.
+#It happen when read 16th-byte offset that value is 0x8. So disable chip 
+def disable_i2c_ir3570a(addr):
+    cmd = "i2cset -y 0 0x%x 0xE5 0x01" % addr
+    status, output = commands.getstatusoutput(cmd)
+    cmd = "i2cset -y 0 0x%x 0x12 0x02" % addr
+    status, output = commands.getstatusoutput(cmd)
+    return status
+
+def ir3570_check():
+    cmd = "i2cdump -y 0 0x42 s 0x9a"
+    try:
+        status, output = commands.getstatusoutput(cmd)
+        lines = output.split('\n')
+        hn = re.findall(r'\w+', lines[-1])
+        version = int(hn[1], 16)
+        if version == 0x24:  #Find IR3570A
+            ret = disable_i2c_ir3570a(4)
+        else:
+            ret = 0
+    except Exception as e:
+        print "Error on ir3570_check() e:" + str(e)
+        return -1
+    return ret
+
 class OnlPlatform_x86_64_accton_as9716_32d_r0(OnlPlatformAccton,
                                               OnlPlatformPortConfig_48x25_6x100):
 
@@ -73,5 +100,6 @@ class OnlPlatform_x86_64_accton_as9716_32d_r0(OnlPlatformAccton,
             self.new_i2c_device('optoe1', 0x50, port+24)
             subprocess.call('echo port%d > /sys/bus/i2c/devices/%d-0050/port_name' % (port, port+24), shell=True)
        
+        ir3570_check()
       
         return True