120 lines
3.8 KiB
Python
120 lines
3.8 KiB
Python
#
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# led_control.py
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#
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# Platform-specific LED control functionality for SONiC
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#
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try:
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from sonic_led.led_control_base import LedControlBase
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import os
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import time
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import syslog
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import sonic_platform.platform
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import sonic_platform.chassis
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except ImportError as e:
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raise ImportError(str(e) + " - required module not found")
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CPLD_DIR = "/sys/bus/i2c/devices/0-0041/"
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def DBG_PRINT(str):
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syslog.openlog("nokia-led")
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syslog.syslog(syslog.LOG_INFO, str)
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syslog.closelog()
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class LedControl(LedControlBase):
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"""Platform specific LED control class"""
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# Constructor
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def __init__(self):
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self.chassis = sonic_platform.platform.Platform().get_chassis()
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self._initDefaultConfig()
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def _initDefaultConfig(self):
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# The fan tray leds and system led managed by new chassis class API
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# leaving only a couple other front panel leds to be done old style
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DBG_PRINT("starting system leds")
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self._initSystemLed()
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DBG_PRINT(" led done")
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def _read_sysfs_file(self, sysfs_file):
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# On successful read, returns the value read from given
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# reg_name and on failure returns 'ERR'
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rv = 'ERR'
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if (not os.path.isfile(sysfs_file)):
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return rv
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try:
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with open(sysfs_file, 'r') as fd:
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rv = fd.read()
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except Exception as e:
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rv = 'ERR'
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rv = rv.rstrip('\r\n')
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rv = rv.lstrip(" ")
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return rv
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def _write_sysfs_file(self, sysfs_file, value):
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# On successful write, the value read will be written on
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# reg_name and on failure returns 'ERR'
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rv = 'ERR'
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if (not os.path.isfile(sysfs_file)):
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return rv
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try:
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with open(sysfs_file, 'w') as fd:
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rv = fd.write(str(value))
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except Exception as e:
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rv = 'ERR'
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return rv
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def _initSystemLed(self):
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# Front Panel System LEDs setting
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oldfan = 0xf # 0=amber, 1=green
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oldpsu = 0xf # 0=amber, 1=green
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# Write sys led
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status = self._write_sysfs_file(CPLD_DIR+"system_led", "green")
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if status == "ERR":
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DBG_PRINT(" System LED NOT set correctly")
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else:
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DBG_PRINT(" System LED set O.K. ")
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# Timer loop to monitor and set front panel Status, Fan, and PSU LEDs
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while True:
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# Front Panel FAN Panel LED setting
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if (self.chassis.get_fan(0).get_status() == self.chassis.get_fan(1).get_status() == True):
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if (os.path.isfile(CPLD_DIR+"fan_led")):
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if oldfan != 0x1:
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self._write_sysfs_file(CPLD_DIR+"fan_led", "green")
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oldfan = 0x1
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else:
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oldfan = 0xf
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else:
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if (os.path.isfile(CPLD_DIR+"fan_led")):
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if oldfan != 0x0:
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self._write_sysfs_file(CPLD_DIR+"fan_led", "amber")
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oldfan = 0x0
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else:
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oldfan = 0xf
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# Front Panel PSU Panel LED setting
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if (self.chassis.get_psu(0).get_status() == self.chassis.get_psu(1).get_status() == True):
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if (os.path.isfile(CPLD_DIR+"psu_led")):
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if oldpsu != 0x1:
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self._write_sysfs_file(CPLD_DIR+"psu_led", "green")
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oldpsu = 0x1
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else:
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oldpsu = 0xf
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else:
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if (os.path.isfile(CPLD_DIR+"psu_led")):
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if oldpsu != 0x0:
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status = self._write_sysfs_file(CPLD_DIR+"psu_led", "amber")
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oldpsu = 0x0
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else:
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oldpsu = 0xf
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time.sleep(6)
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