229 lines
7.0 KiB
Python
229 lines
7.0 KiB
Python
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#!/usr/bin/env python
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#############################################################################
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# Celestica
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#
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# Module contains an implementation of SONiC Platform Base API and
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# provides the fan status which are available in the platform
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#
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#############################################################################
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import json
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import math
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import os.path
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try:
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from sonic_platform_base.fan_base import FanBase
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except ImportError as e:
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raise ImportError(str(e) + "- required module not found")
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CONFIG_DB_PATH = "/etc/sonic/config_db.json"
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EMC2305_PATH = "/sys/bus/i2c/drivers/emc2305/"
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SYS_GPIO_DIR = "/sys/class/gpio"
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EMC2305_MAX_PWM = 255
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EMC2305_FAN_PWM = "pwm{}"
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EMC2305_FAN_TARGET = "fan{}_target"
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EMC2305_FAN_INPUT = "pwm{}"
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class Fan(FanBase):
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"""Platform-specific Fan class"""
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def __init__(self, fan_index):
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self.index = fan_index
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self.config_data = {}
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self.fan_speed = 0
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FanBase.__init__(self)
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# dx010 fan attributes
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# Two EMC2305s located at i2c-13-4d and i2c-13-2e
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# to control a dual-fan module.
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self.dx010_emc2305_chip = [
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{
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'device': "13-002e",
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'index_map': [2, 1, 4, 5, 3]
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},
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{
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'device': "13-004d",
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'index_map': [2, 4, 5, 3, 1]
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}
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]
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self.dx010_fan_gpio = [
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{'base': self.get_gpio_base()},
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{'prs': 10, 'dir': 15, 'color': {'red': 31, 'green': 32}},
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{'prs': 11, 'dir': 16, 'color': {'red': 29, 'green': 30}},
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{'prs': 12, 'dir': 17, 'color': {'red': 35, 'green': 36}},
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{'prs': 13, 'dir': 18, 'color': {'red': 37, 'green': 38}},
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{'prs': 14, 'dir': 19, 'color': {'red': 33, 'green': 34}},
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]
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def get_gpio_base(self):
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for r in os.listdir(SYS_GPIO_DIR):
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if "gpiochip" in r:
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return int(r[8:], 10)
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return 216 # Reserve
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def get_gpio_value(self, pinnum):
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gpio_base = self.dx010_fan_gpio[0]['base']
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gpio_dir = SYS_GPIO_DIR + '/gpio' + str(gpio_base+pinnum)
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gpio_file = gpio_dir + "/value"
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try:
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with open(gpio_file, 'r') as fd:
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retval = fd.read()
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except IOError:
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raise IOError("Unable to open " + gpio_file + "file !")
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retval = retval.rstrip('\r\n')
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return retval
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def set_gpio_value(self, pinnum, value=0):
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gpio_base = self.dx010_fan_gpio[0]['base']
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gpio_dir = SYS_GPIO_DIR + '/gpio' + str(gpio_base+pinnum)
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gpio_file = gpio_dir + "/value"
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try:
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with open(gpio_file, 'w') as fd:
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retval = fd.write(str(value))
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except IOError:
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raise IOError("Unable to open " + gpio_file + "file !")
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def get_direction(self):
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direction = self.FAN_DIRECTION_INTAKE
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raw = self.get_gpio_value(self.dx010_fan_gpio[self.index+1]['dir'])
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if int(raw, 10) == 0:
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direction = self.FAN_DIRECTION_INTAKE
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else:
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direction = self.FAN_DIRECTION_EXHAUST
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return direction
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def get_speed(self):
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"""
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DX010 platform specific data:
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speed = pwm_in/255*100
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"""
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# TODO: Seperate PSU's fan and main fan class
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if self.fan_speed != 0:
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return self.fan_speed
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else:
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speed = 0
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pwm = []
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emc2305_chips = self.dx010_emc2305_chip
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for chip in emc2305_chips:
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device = chip['device']
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fan_index = chip['index_map']
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sysfs_path = "%s%s/%s" % (
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EMC2305_PATH, device, EMC2305_FAN_INPUT)
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sysfs_path = sysfs_path.format(fan_index[self.index])
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try:
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with open(sysfs_path, 'r') as file:
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raw = file.read().strip('\r\n')
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pwm.append(int(raw, 10))
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except IOError:
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raise IOError("Unable to open " + sysfs_path)
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speed = math.ceil(
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float(pwm[0]) * 100 / EMC2305_MAX_PWM)
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return int(speed)
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def get_target_speed(self):
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"""
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DX010 platform specific data:
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speed_pc = pwm_target/255*100
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0 : when PWM mode is use
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pwm : when pwm mode is not use
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"""
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target = 0
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pwm = []
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emc2305_chips = self.dx010_emc2305_chip
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for chip in emc2305_chips:
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device = chip['device']
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fan_index = chip['index_map']
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sysfs_path = "%s%s/%s" % (
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EMC2305_PATH, device, EMC2305_FAN_TARGET)
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sysfs_path = sysfs_path.format(fan_index[self.index])
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try:
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with open(sysfs_path, 'r') as file:
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raw = file.read().strip('\r\n')
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pwm.append(int(raw, 10))
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except IOError:
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raise IOError("Unable to open " + sysfs_path)
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target = pwm[0] * 100 / EMC2305_MAX_PWM
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return target
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def get_speed_tolerance(self):
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"""
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Retrieves the speed tolerance of the fan
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Returns:
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An integer, the percentage of variance from target speed which is
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considered tolerable
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"""
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return 10
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def set_speed(self, speed):
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"""
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Depends on pwm or target mode is selected:
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1) pwm = speed_pc * 255 <-- Currently use this mode.
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2) target_pwm = speed_pc * 100 / 255
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2.1) set pwm{}_enable to 3
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"""
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pwm = speed * 255 / 100
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emc2305_chips = self.dx010_emc2305_chip
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for chip in emc2305_chips:
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device = chip['device']
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fan_index = chip['index_map']
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sysfs_path = "%s%s/%s" % (
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EMC2305_PATH, device, EMC2305_FAN_PWM)
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sysfs_path = sysfs_path.format(fan_index[self.index])
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try:
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with open(sysfs_path, 'w') as file:
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file.write(str(int(pwm)))
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except IOError:
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return False
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return True
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def set_status_led(self, color):
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try:
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if color == self.STATUS_LED_COLOR_GREEN:
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self.set_gpio_value(
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self.dx010_fan_gpio[self.index+1]['color']['red'], 1)
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self.set_gpio_value(
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self.dx010_fan_gpio[self.index+1]['color']['green'], 0)
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elif color == self.STATUS_LED_COLOR_RED:
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self.set_gpio_value(
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self.dx010_fan_gpio[self.index+1]['color']['red'], 0)
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self.set_gpio_value(
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self.dx010_fan_gpio[self.index+1]['color']['green'], 1)
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elif color == self.STATUS_LED_COLOR_OFF:
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self.set_gpio_value(
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self.dx010_fan_gpio[self.index+1]['color']['red'], 1)
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self.set_gpio_value(
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self.dx010_fan_gpio[self.index+1]['color']['green'], 1)
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else:
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return False
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except IOError:
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return False
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return True
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