[device/platform] Add reset in sfputil.py for Accton AS7326-56X (#3685)

Add reset in sfputil.py for as7326-56x.

Signed-off-by: brandon_chuang <brandon_chuang@edge-core.com>

device/accton/x86_64-accton_as7326_56x-r0/plugins/sfputil.py

@@ -219,8 +219,30 @@ class SfpUtil(SfpUtilBase):
                 time.sleep(0.01)
 
     def reset(self, port_num):
-        raise NotImplementedError
+        if port_num < self.qsfp_port_start or port_num > self.qsfp_port_end:
+            return False
 
+        cpld_i = self.get_cpld_num(port_num)
+        cpld_ps = self._cpld_mapping[cpld_i]
+        path = "/sys/bus/i2c/devices/{0}/module_reset_{1}"
+        port_ps = path.format(cpld_ps, port_num)
+        
+        self.__port_to_mod_rst = port_ps
+        try:
+            reg_file = open(self.__port_to_mod_rst, 'r+', buffering=0)
+        except IOError as e:
+            print "Error: unable to open file: %s" % str(e)
+            return False
+
+        #toggle reset
+        reg_file.seek(0)
+        reg_file.write('1')
+        time.sleep(1)
+        reg_file.seek(0)
+        reg_file.write('0')
+        reg_file.close()
+        
+        return True
     @property
     def _get_present_bitmap(self):
         nodes = []

platform/broadcom/sonic-platform-modules-accton/as7326-56x/modules/accton_i2c_cpld.c

@@ -285,6 +285,14 @@ enum as7326_56x_cpld_sysfs_attributes {
 	TRANSCEIVER_TXFAULT_ATTR_ID(48),
 	TRANSCEIVER_TXFAULT_ATTR_ID(57),
 	TRANSCEIVER_TXFAULT_ATTR_ID(58),
+	TRANSCEIVER_RESET_ATTR_ID(49),
+	TRANSCEIVER_RESET_ATTR_ID(50),
+	TRANSCEIVER_RESET_ATTR_ID(51),
+	TRANSCEIVER_RESET_ATTR_ID(52),
+	TRANSCEIVER_RESET_ATTR_ID(53),
+	TRANSCEIVER_RESET_ATTR_ID(54),
+	TRANSCEIVER_RESET_ATTR_ID(55),
+	TRANSCEIVER_RESET_ATTR_ID(56),
 };
 
 /* sysfs attributes for hwmon 
@@ -297,6 +305,8 @@ static ssize_t show_rxlos_all(struct device *dev, struct device_attribute *da,
              char *buf);
 static ssize_t set_tx_disable(struct device *dev, struct device_attribute *da,
 			const char *buf, size_t count);
+static ssize_t set_reset(struct device *dev, struct device_attribute *da,
+			const char *buf, size_t count);
 static ssize_t access(struct device *dev, struct device_attribute *da,
 			const char *buf, size_t count);
 static ssize_t show_version(struct device *dev, struct device_attribute *da,
@@ -437,6 +447,15 @@ DECLARE_SFP_TRANSCEIVER_SENSOR_DEVICE_ATTR(48);
 DECLARE_SFP_TRANSCEIVER_SENSOR_DEVICE_ATTR(57);
 DECLARE_SFP_TRANSCEIVER_SENSOR_DEVICE_ATTR(58);
 
+DECLARE_TRANSCEIVER_RESET_SENSOR_DEVICE_ATTR(49);
+DECLARE_TRANSCEIVER_RESET_SENSOR_DEVICE_ATTR(50);
+DECLARE_TRANSCEIVER_RESET_SENSOR_DEVICE_ATTR(51);
+DECLARE_TRANSCEIVER_RESET_SENSOR_DEVICE_ATTR(52);
+DECLARE_TRANSCEIVER_RESET_SENSOR_DEVICE_ATTR(53);
+DECLARE_TRANSCEIVER_RESET_SENSOR_DEVICE_ATTR(54);
+DECLARE_TRANSCEIVER_RESET_SENSOR_DEVICE_ATTR(55);
+DECLARE_TRANSCEIVER_RESET_SENSOR_DEVICE_ATTR(56);
+
 static struct attribute *as7326_56x_cpld3_attributes[] = {
     &sensor_dev_attr_version.dev_attr.attr,
     &sensor_dev_attr_access.dev_attr.attr,
@@ -507,7 +526,7 @@ static struct attribute *as7326_56x_cpld2_attributes[] = {
 	DECLARE_SFP_TRANSCEIVER_ATTR(22),
 	DECLARE_SFP_TRANSCEIVER_ATTR(23),
 	DECLARE_SFP_TRANSCEIVER_ATTR(24),
-    	DECLARE_SFP_TRANSCEIVER_ATTR(25),
+	DECLARE_SFP_TRANSCEIVER_ATTR(25),
 	DECLARE_SFP_TRANSCEIVER_ATTR(26),
 	DECLARE_SFP_TRANSCEIVER_ATTR(27),
 	DECLARE_SFP_TRANSCEIVER_ATTR(28),
@@ -574,6 +593,14 @@ static struct attribute *as7326_56x_cpld1_attributes[] = {
 	DECLARE_SFP_TRANSCEIVER_ATTR(48),
 	DECLARE_SFP_TRANSCEIVER_ATTR(57),
 	DECLARE_SFP_TRANSCEIVER_ATTR(58),
+	DECLARE_TRANSCEIVER_RESET_ATTR(49),
+	DECLARE_TRANSCEIVER_RESET_ATTR(50),
+	DECLARE_TRANSCEIVER_RESET_ATTR(51),
+	DECLARE_TRANSCEIVER_RESET_ATTR(52),
+	DECLARE_TRANSCEIVER_RESET_ATTR(53),
+	DECLARE_TRANSCEIVER_RESET_ATTR(54),
+	DECLARE_TRANSCEIVER_RESET_ATTR(55),
+	DECLARE_TRANSCEIVER_RESET_ATTR(56),
 	NULL
 };
 
@@ -724,6 +751,11 @@ static ssize_t show_status(struct device *dev, struct device_attribute *da,
 		reg  = 0x19;
 		mask = 0x1 << (( attr->index - MODULE_RXLOS_57)+2);
 		break;
+    case MODULE_RESET_49 ... MODULE_RESET_56:
+		reg  = 0x4;
+		mask = 0x1 << (attr->index - MODULE_RESET_49);
+		revert = 1;
+		break;
 	default:
 		return 0;
 	}
@@ -806,6 +838,59 @@ exit:
 	return status;
 }
 
+static ssize_t set_reset(struct device *dev, struct device_attribute *da,
+			const char *buf, size_t count)
+{
+    struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+	struct i2c_client *client = to_i2c_client(dev);
+	struct as7326_56x_cpld_data *data = i2c_get_clientdata(client);
+	long reset;
+	int status;
+    u8 reg = 0, mask = 0;
+     
+	status = kstrtol(buf, 10, &reset);
+	if (status) {
+		return status;
+	}
+  
+	switch (attr->index)
+	{
+        case MODULE_RESET_49 ... MODULE_RESET_56:
+            reg  = 0x4;
+            mask = 0x1 << (attr->index - MODULE_RESET_49);
+            break;
+        default:
+            return 0;
+	}
+
+    /* Read current status */
+    mutex_lock(&data->update_lock);
+	status = as7326_56x_cpld_read_internal(client, reg);
+	if (unlikely(status < 0)) {
+		goto exit;
+	}
+
+	/* Update reset status */
+	if (!reset) {
+		status |= mask;
+	}
+	else {
+		status &= ~mask;
+	}
+
+    status = as7326_56x_cpld_write_internal(client, reg, status);
+	if (unlikely(status < 0)) {
+		goto exit;
+	}
+    
+    mutex_unlock(&data->update_lock);
+    return count;
+
+exit:
+	mutex_unlock(&data->update_lock);
+	return status;
+}
+
 static ssize_t access(struct device *dev, struct device_attribute *da,
 			const char *buf, size_t count)
 {