#!/usr/bin/env python ############################################################################# # Celestica # # Module contains an implementation of SONiC Platform Base API and # provides the fan status which are available in the platform # ############################################################################# import json import math import os.path try: from sonic_platform_base.fan_base import FanBase from helper import APIHelper except ImportError as e: raise ImportError(str(e) + "- required module not found") EMC2305_PATH = "/sys/bus/i2c/drivers/emc2305/" GPIO_DIR = "/sys/class/gpio" GPIO_LABEL = "pca9505" EMC2305_MAX_PWM = 255 EMC2305_FAN_PWM = "pwm{}" EMC2305_FAN_TARGET = "fan{}_target" EMC2305_FAN_INPUT = "pwm{}" FAN_NAME_LIST = ["FAN-1F", "FAN-1R", "FAN-2F", "FAN-2R", "FAN-3F", "FAN-3R", "FAN-4F", "FAN-4R", "FAN-5F", "FAN-5R"] PSU_FAN_MAX_RPM = 11000 PSU_HWMON_PATH = "/sys/bus/i2c/devices/i2c-{0}/{0}-00{1}/hwmon" PSU_I2C_MAPPING = { 0: { "num": 10, "addr": "5a" }, 1: { "num": 11, "addr": "5b" }, } NULL_VAL = "N/A" class Fan(FanBase): """Platform-specific Fan class""" def __init__(self, fan_tray_index, fan_index=0, is_psu_fan=False, psu_index=0): FanBase.__init__(self) self.fan_index = fan_index self._api_helper = APIHelper() self.fan_tray_index = fan_tray_index self.is_psu_fan = is_psu_fan if self.is_psu_fan: self.psu_index = psu_index self.psu_i2c_num = PSU_I2C_MAPPING[self.psu_index]["num"] self.psu_i2c_addr = PSU_I2C_MAPPING[self.psu_index]["addr"] self.psu_hwmon_path = PSU_HWMON_PATH.format( self.psu_i2c_num, self.psu_i2c_addr) # dx010 fan attributes # Two EMC2305s located at i2c-13-4d and i2c-13-2e # to control a dual-fan module. self.emc2305_chip_mapping = [ { 'device': "13-002e", 'index_map': [2, 1, 4, 5, 3] }, { 'device': "13-004d", 'index_map': [2, 4, 5, 3, 1] } ] self.dx010_fan_gpio = [ {'base': self.__get_gpio_base()}, {'prs': 11, 'dir': 16, 'color': {'red': 31, 'green': 32}}, # 1 {'prs': 10, 'dir': 15, 'color': {'red': 29, 'green': 30}}, # 2 {'prs': 13, 'dir': 18, 'color': {'red': 35, 'green': 36}}, # 3 {'prs': 14, 'dir': 19, 'color': {'red': 37, 'green': 38}}, # 4 {'prs': 12, 'dir': 17, 'color': {'red': 33, 'green': 34}}, # 5 ] def __write_txt_file(self, file_path, value): try: with open(file_path, 'w') as fd: fd.write(str(value)) except: return False return True def __search_file_by_name(self, directory, file_name): for dirpath, dirnames, files in os.walk(directory): for name in files: file_path = os.path.join(dirpath, name) if name in file_name: return file_path return None def __get_gpio_base(self): for r in os.listdir(GPIO_DIR): label_path = os.path.join(GPIO_DIR, r, "label") if "gpiochip" in r and GPIO_LABEL in self._api_helper.read_txt_file(label_path): return int(r[8:], 10) return 216 # Reserve def __get_gpio_value(self, pinnum): gpio_base = self.dx010_fan_gpio[0]['base'] gpio_dir = GPIO_DIR + '/gpio' + str(gpio_base+pinnum) gpio_file = gpio_dir + "/value" retval = self._api_helper.read_txt_file(gpio_file) return retval.rstrip('\r\n') def __set_gpio_value(self, pinnum, value=0): gpio_base = self.dx010_fan_gpio[0]['base'] gpio_dir = GPIO_DIR + '/gpio' + str(gpio_base+pinnum) gpio_file = gpio_dir + "/value" return self.__write_txt_file(gpio_file, value) def get_direction(self): """ Retrieves the direction of fan Returns: A string, either FAN_DIRECTION_INTAKE or FAN_DIRECTION_EXHAUST depending on fan direction """ direction = self.FAN_DIRECTION_EXHAUST if not self.is_psu_fan: raw = self.__get_gpio_value( self.dx010_fan_gpio[self.fan_tray_index+1]['dir']) direction = self.FAN_DIRECTION_INTAKE if int( raw, 10) == 0 else self.FAN_DIRECTION_EXHAUST return direction def get_speed(self): """ Retrieves the speed of fan as a percentage of full speed Returns: An integer, the percentage of full fan speed, in the range 0 (off) to 100 (full speed) Note: speed = pwm_in/255*100 """ speed = 0 if self.is_psu_fan: fan_speed_sysfs_name = "fan{}_input".format(self.fan_index+1) fan_speed_sysfs_path = self.__search_file_by_name( self.psu_hwmon_path, fan_speed_sysfs_name) fan_speed_rpm = self._api_helper.read_txt_file( fan_speed_sysfs_path) or 0 fan_speed_raw = float(fan_speed_rpm)/PSU_FAN_MAX_RPM * 100 speed = math.ceil(float(fan_speed_rpm) * 100 / PSU_FAN_MAX_RPM) elif self.get_presence(): chip = self.emc2305_chip_mapping[self.fan_index] device = chip['device'] fan_index = chip['index_map'] sysfs_path = "%s%s/%s" % ( EMC2305_PATH, device, EMC2305_FAN_INPUT) sysfs_path = sysfs_path.format(fan_index[self.fan_tray_index]) raw = self._api_helper.read_txt_file(sysfs_path).strip('\r\n') pwm = int(raw, 10) if raw else 0 speed = math.ceil(float(pwm * 100 / EMC2305_MAX_PWM)) return int(speed) def get_target_speed(self): """ Retrieves the target (expected) speed of the fan Returns: An integer, the percentage of full fan speed, in the range 0 (off) to 100 (full speed) Note: speed_pc = pwm_target/255*100 0 : when PWM mode is use pwm : when pwm mode is not use """ return 'N/A' def get_speed_tolerance(self): """ Retrieves the speed tolerance of the fan Returns: An integer, the percentage of variance from target speed which is considered tolerable """ return 10 def set_speed(self, speed): """ Sets the fan speed Args: speed: An integer, the percentage of full fan speed to set fan to, in the range 0 (off) to 100 (full speed) Returns: A boolean, True if speed is set successfully, False if not Note: Depends on pwm or target mode is selected: 1) pwm = speed_pc * 255 <-- Currently use this mode. 2) target_pwm = speed_pc * 100 / 255 2.1) set pwm{}_enable to 3 """ pwm = speed * 255 / 100 if not self.is_psu_fan and self.get_presence(): chip = self.emc2305_chip_mapping[self.fan_index] device = chip['device'] fan_index = chip['index_map'] sysfs_path = "%s%s/%s" % ( EMC2305_PATH, device, EMC2305_FAN_PWM) sysfs_path = sysfs_path.format(fan_index[self.fan_tray_index]) return self.__write_txt_file(sysfs_path, int(pwm)) return False def set_status_led(self, color): """ Sets the state of the fan module status LED Args: color: A string representing the color with which to set the fan module status LED Returns: bool: True if status LED state is set successfully, False if not """ set_status_led = False if not self.is_psu_fan: s1, s2 = False, False try: if color == self.STATUS_LED_COLOR_GREEN: s1 = self.__set_gpio_value( self.dx010_fan_gpio[self.fan_tray_index+1]['color']['red'], 1) s2 = self.__set_gpio_value( self.dx010_fan_gpio[self.fan_tray_index+1]['color']['green'], 0) elif color == self.STATUS_LED_COLOR_RED: s1 = self.__set_gpio_value( self.dx010_fan_gpio[self.fan_tray_index+1]['color']['red'], 0) s2 = self.__set_gpio_value( self.dx010_fan_gpio[self.fan_tray_index+1]['color']['green'], 1) elif color == self.STATUS_LED_COLOR_OFF: s1 = self.__set_gpio_value( self.dx010_fan_gpio[self.fan_tray_index+1]['color']['red'], 1) s2 = self.__set_gpio_value( self.dx010_fan_gpio[self.fan_tray_index+1]['color']['green'], 1) set_status_led = s1 and s2 return set_status_led except IOError: return False return set_status_led def get_name(self): """ Retrieves the name of the device Returns: string: The name of the device """ fan_name = FAN_NAME_LIST[self.fan_tray_index*2 + self.fan_index] if not self.is_psu_fan else "PSU-{} FAN-{}".format( self.psu_index+1, self.fan_index+1) return fan_name def get_presence(self): """ Retrieves the presence of the FAN Returns: bool: True if FAN is present, False if not """ present_str = self.__get_gpio_value( self.dx010_fan_gpio[self.fan_tray_index+1]['prs']) return int(present_str, 10) == 0 if not self.is_psu_fan else True def get_model(self): """ Retrieves the model number (or part number) of the device Returns: string: Model/part number of device """ if self.is_psu_fan: return NULL_VAL model = NULL_VAL return model def get_serial(self): """ Retrieves the serial number of the device Returns: string: Serial number of device """ if self.is_psu_fan: return NULL_VAL serial = NULL_VAL return serial def get_status(self): """ Retrieves the operational status of the device Returns: A boolean value, True if device is operating properly, False if not """ return self.get_presence() and self.get_speed() > 0