DellEMC: S6100, S6000 - Enable thermalctld, Platform API implementation and fixes (#6438)

**- Why I did it**

To incorporate the below changes in DellEMC S6100, S6000 platforms.

- S6100, S6000:
    - Enable 'thermalctld'
    - Implement DeviceBase methods (presence, status, model, serial) for Fantray and Component
    - Implement ‘get_position_in_parent’, ‘is_replaceable’ methods for all device types
    - Implement ‘get_status’ method for Fantray
    - Implement ‘get_temperature’, ‘get_temperature_high_threshold’, ‘get_voltage_high_threshold’, ‘get_voltage_low_threshold’ methods for PSU
    - Implement ‘get_status_led’, ‘set_status_led’ methods for Chassis
    - SFP:
        - Make EEPROM read both Python2 and Python3 compatible
        - Fix ‘get_tx_disable_channel’ method’s return type
        - Implement ‘tx_disable’, ‘tx_disable_channel’ and ‘set_power_override’ methods
- S6000:
    - Move PSU thermal sensors from Chassis to respective PSU
    - Make available the data of both Fans present in each Fantray


**- How I did it**

- Remove 'skip_thermalctld:true' in pmon_daemon_control.json
- Implement the platform API methods in the respective device files
- Use `bytearray` for data read from transceiver EEPROM 
- Change return type of 'get_tx_disable_channel' to match specification in sonic_platform_common/sfp_base.py

Author: ArunSaravananBalachandran

device/dell/x86_64-dell_s6000_s1220-r0/pmon_daemon_control.json

@@ -1,4 +1,3 @@
 {
-    "skip_ledd": true,
-    "skip_thermalctld": true
+    "skip_ledd": true
 }

device/dell/x86_64-dell_s6100_c2538-r0/pmon_daemon_control.json

@@ -1,4 +1,3 @@
 {
-    "skip_ledd": true,
-    "skip_thermalctld": true
+    "skip_ledd": true
 }

platform/broadcom/sonic-platform-modules-dell/common/dell_pmc.c

@@ -174,6 +174,9 @@
 /* Mailbox PowerOn Reason */
 #define TRACK_POWERON_REASON    0x05FF
 
+/* System Status LED */
+#define SYSTEM_STATUS_LED       0x04DF
+
 /* CPU Set IO Modules */
 #define CPU_IOM1_CTRL_FLAG 0x04D9
 #define CPU_IOM2_CTRL_FLAG 0x04DA
@@ -607,6 +610,44 @@ static ssize_t show_mb_poweron_reason(struct device *dev,
     return sprintf(buf, "0x%x\n", ret);
 }
 
+/* System Status LED */
+static ssize_t set_sys_status_led(struct device *dev,
+              struct device_attribute *devattr, const char *buf, size_t count)
+{
+    int              err = 0;
+    unsigned int     dev_data = 0;
+    struct smf_data *data = dev_get_drvdata(dev);
+
+    if (data->kind == z9100smf)
+	return -1;
+
+    err = kstrtouint(buf, 16, &dev_data);
+    if (err)
+        return err;
+
+    err = smf_write_reg(data, SYSTEM_STATUS_LED, dev_data);
+    if(err < 0)
+	return err;
+
+    return count;
+}
+
+static ssize_t show_sys_status_led(struct device *dev,
+                struct device_attribute *devattr, char *buf)
+{
+    unsigned int     ret = 0;
+    struct smf_data *data = dev_get_drvdata(dev);
+
+    if (data->kind == z9100smf)
+	return 0;
+
+    ret = smf_read_reg(data, SYSTEM_STATUS_LED);
+    if(ret < 0)
+       return ret;
+
+    return sprintf(buf, "0x%x\n", ret);
+}
+
 /* FANIN ATTR */
 static ssize_t
 show_fan_label(struct device *dev, struct device_attribute *attr, char *buf)
@@ -2081,12 +2122,17 @@ static SENSOR_DEVICE_ATTR(smf_poweron_reason, S_IRUGO,
 static SENSOR_DEVICE_ATTR(mb_poweron_reason, S_IRUGO|S_IWUSR,
                             show_mb_poweron_reason, set_mb_poweron_reason, 0);
 
+/* System Status LED */
+static SENSOR_DEVICE_ATTR(sys_status_led, S_IRUGO|S_IWUSR,
+                            show_sys_status_led, set_sys_status_led, 0);
+
 static struct attribute *smf_dell_attrs[] = {
         &sensor_dev_attr_smf_version.dev_attr.attr,
         &sensor_dev_attr_smf_firmware_ver.dev_attr.attr,
         &sensor_dev_attr_smf_reset_reason.dev_attr.attr,
         &sensor_dev_attr_smf_poweron_reason.dev_attr.attr,
         &sensor_dev_attr_mb_poweron_reason.dev_attr.attr,
+        &sensor_dev_attr_sys_status_led.dev_attr.attr,
         &sensor_dev_attr_fan_tray_presence.dev_attr.attr,
         &sensor_dev_attr_fan1_airflow.dev_attr.attr,
         &sensor_dev_attr_fan3_airflow.dev_attr.attr,

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

@@ -24,7 +24,7 @@
 
 MAX_S6000_FANTRAY = 3
 MAX_S6000_PSU = 2
-MAX_S6000_THERMAL = 10
+MAX_S6000_THERMAL = 6
 MAX_S6000_COMPONENT = 4
 
 
@@ -44,6 +44,8 @@ class Chassis(ChassisBase):
 
     def __init__(self):
         ChassisBase.__init__(self)
+        self.status_led_reg = "system_led"
+        self.supported_led_color = ['green', 'blinking green', 'amber', 'blinking amber']
         # Initialize SFP list
         self.PORT_START = 0
         self.PORT_END = 31
@@ -101,13 +103,30 @@ def _get_cpld_register(self, reg_name):
         try:
             with open(mb_reg_file, 'r') as fd:
                 rv = fd.read()
-        except Exception as error:
+        except IOError:
             rv = 'ERR'
 
         rv = rv.rstrip('\r\n')
         rv = rv.lstrip(" ")
         return rv
 
+    def _set_cpld_register(self, reg_name, value):
+        # On successful write, returns the value will be written on
+        # reg_name and on failure returns 'ERR'
+        rv = 'ERR'
+        cpld_reg_file = self.CPLD_DIR+'/'+reg_name
+
+        if (not os.path.isfile(cpld_reg_file)):
+            return rv
+
+        try:
+            with open(cpld_reg_file, 'w') as fd:
+                rv = fd.write(str(value))
+        except IOError:
+            rv = 'ERR'
+
+        return rv
+
     def _nvram_write(self, offset, val):
         resource = "/dev/nvram"
         fd = os.open(resource, os.O_RDWR)
@@ -179,6 +198,23 @@ def get_status(self):
         """
         return True
 
+    def get_position_in_parent(self):
+        """
+        Retrieves 1-based relative physical position in parent device.
+        Returns:
+            integer: The 1-based relative physical position in parent
+            device or -1 if cannot determine the position
+        """
+        return -1
+
+    def is_replaceable(self):
+        """
+        Indicate whether Chassis is replaceable.
+        Returns:
+            bool: True if it is replaceable.
+        """
+        return False
+
     def get_base_mac(self):
         """
         Retrieves the base MAC address for the chassis
@@ -305,4 +341,41 @@ def get_change_event(self, timeout=0):
                     return True, ret_dict
         return False, ret_dict
 
+    def set_status_led(self, color):
+        """
+        Sets the state of the system LED
 
+        Args:
+            color: A string representing the color with which to set the
+                   system LED
+
+        Returns:
+            bool: True if system LED state is set successfully, False if not
+        """
+        if color not in self.supported_led_color:
+            return False
+
+        # Change color string format to the one used by driver
+        color = color.replace('amber', 'yellow')
+        color = color.replace('blinking ', 'blink_')
+        rv = self._set_cpld_register(self.status_led_reg, color)
+        if (rv != 'ERR'):
+            return True
+        else:
+            return False
+
+    def get_status_led(self):
+        """
+        Gets the state of the system LED
+
+        Returns:
+            A string, one of the valid LED color strings which could be vendor
+            specified.
+        """
+        status_led = self._get_cpld_register(self.status_led_reg)
+        if (status_led != 'ERR'):
+            status_led = status_led.replace('yellow', 'amber')
+            status_led = status_led.replace('blink_', 'blinking ')
+            return status_led
+        else:
+            return None

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

@@ -29,8 +29,8 @@ class Component(ComponentBase):
                   "booting")],
         ["System-CPLD", "Used for managing CPU board devices and power"],
         ["Master-CPLD", ("Used for managing Fan, PSU, system LEDs, QSFP "
-                         "modules (1-16)")],
-        ["Slave-CPLD", "Used for managing QSFP modules (17-32)"]
+                         "modules (17-32)")],
+        ["Slave-CPLD", "Used for managing QSFP modules (1-16)"]
     ]
 
     def __init__(self, component_index):
@@ -90,6 +90,55 @@ def get_name(self):
         """
         return self.name
 
+    def get_model(self):
+        """
+        Retrieves the part number of the component
+        Returns:
+            string: Part number of component
+        """
+        return 'NA'
+
+    def get_serial(self):
+        """
+        Retrieves the serial number of the component
+        Returns:
+            string: Serial number of component
+        """
+        return 'NA'
+
+    def get_presence(self):
+        """
+        Retrieves the presence of the component
+        Returns:
+            bool: True if  present, False if not
+        """
+        return True
+
+    def get_status(self):
+        """
+        Retrieves the operational status of the component
+        Returns:
+            bool: True if component is operating properly, False if not
+        """
+        return True
+
+    def get_position_in_parent(self):
+        """
+        Retrieves 1-based relative physical position in parent device.
+        Returns:
+            integer: The 1-based relative physical position in parent
+            device or -1 if cannot determine the position
+        """
+        return -1
+
+    def is_replaceable(self):
+        """
+        Indicate whether component is replaceable.
+        Returns:
+            bool: True if it is replaceable.
+        """
+        return False
+
     def get_description(self):
         """
         Retrieves the description of the component

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

@@ -36,8 +36,8 @@
     ('Fab Rev', 's', 2)
     ]
 
-# Fan eeprom fields in format required by EepromDecoder
-fan_eeprom_format = [
+# FanTray eeprom fields in format required by EepromDecoder
+fantray_eeprom_format = [
     ('PPID', 's', 20), ('DPN Rev', 's', 3), ('Service Tag', 's', 7),
     ('Part Number', 's', 10), ('Part Num Revision', 's', 3),
     ('Mfg Test', 's', 2), ('Redundant copy', 's', 83),
@@ -51,10 +51,10 @@ class Eeprom(TlvInfoDecoder):
 
     I2C_DIR = "/sys/class/i2c-adapter/"
 
-    def __init__(self, is_psu=False, psu_index=0, is_fan=False, fan_index=0):
+    def __init__(self, is_psu=False, psu_index=0, is_fantray=False, fantray_index=0):
         self.is_psu_eeprom = is_psu
-        self.is_fan_eeprom = is_fan
-        self.is_sys_eeprom = not (is_psu | is_fan)
+        self.is_fantray_eeprom = is_fantray
+        self.is_sys_eeprom = not (is_psu | is_fantray)
 
         if self.is_sys_eeprom:
             self.start_offset = 0
@@ -71,10 +71,10 @@ def __init__(self, is_psu=False, psu_index=0, is_fan=False, fan_index=0):
                     + "i2c-1/1-005{}/eeprom".format(2 - self.index)
                 self.format = psu_eeprom_format
             else:
-                self.index = fan_index
+                self.index = fantray_index
                 self.eeprom_path = self.I2C_DIR \
                     + "i2c-11/11-005{}/eeprom".format(4 - self.index)
-                self.format = fan_eeprom_format
+                self.format = fantray_eeprom_format
             EepromDecoder.__init__(self, self.eeprom_path, self.format,
                                    self.start_offset, '', True)
             self._load_device_eeprom()