93 lines
2.5 KiB
Python
93 lines
2.5 KiB
Python
|
#
|
||
|
|
# psuutil.py
|
||
|
|
# Platform-specific PSU status interface for SONiC
|
||
|
|
#
|
||
|
|
|
||
|
|
|
||
|
|
import os.path
|
||
|
|
|
||
|
|
try:
|
||
|
|
from sonic_psu.psu_base import PsuBase
|
||
|
|
except ImportError as e:
|
||
|
|
raise ImportError(str(e) + "- required module not found")
|
||
|
|
|
||
|
|
|
||
|
|
class PsuUtil(PsuBase):
|
||
|
|
"""Platform-specific PSUutil class"""
|
||
|
|
|
||
|
|
PSU_CPLD_DIR = "/sys/bus/i2c/devices/0-0033"
|
||
|
|
|
||
|
|
def __init__(self):
|
||
|
|
PsuBase.__init__(self)
|
||
|
|
|
||
|
|
|
||
|
|
# Get sysfs attribute
|
||
|
|
def get_attr_value(self, attr_path):
|
||
|
|
|
||
|
|
retval = 'ERR'
|
||
|
|
if (not os.path.isfile(attr_path)):
|
||
|
|
return retval
|
||
|
|
|
||
|
|
try:
|
||
|
|
with open(attr_path, 'r') as fd:
|
||
|
|
retval = fd.read()
|
||
|
|
except Exception as error:
|
||
|
|
logging.error("Unable to open ", attr_path, " file !")
|
||
|
|
|
||
|
|
retval = retval.rstrip('\r\n')
|
||
|
|
return retval
|
||
|
|
|
||
|
|
def get_num_psus(self):
|
||
|
|
"""
|
||
|
|
Retrieves the number of PSUs available on the device
|
||
|
|
:return: An integer, the number of PSUs available on the device
|
||
|
|
"""
|
||
|
|
MAX_PSUS = 2
|
||
|
|
return MAX_PSUS
|
||
|
|
|
||
|
|
def get_psu_status(self, index):
|
||
|
|
"""
|
||
|
|
Retrieves the oprational status of power supply unit (PSU) defined
|
||
|
|
by index <index>
|
||
|
|
:param index: An integer, index of the PSU of which to query status
|
||
|
|
:return: Boolean, True if PSU is operating properly, False if PSU is\
|
||
|
|
faulty
|
||
|
|
"""
|
||
|
|
status = 0
|
||
|
|
mask = [ 0x04, 0x08 ]
|
||
|
|
attr_file = 'cpld_pw_good'
|
||
|
|
attr_path = self.PSU_CPLD_DIR +'/'+ attr_file
|
||
|
|
|
||
|
|
attr_value = self.get_attr_value(attr_path)
|
||
|
|
|
||
|
|
if (attr_value != 'ERR'):
|
||
|
|
attr_value = int(attr_value, 16)
|
||
|
|
# Check for PSU status
|
||
|
|
if (attr_value & mask[index-1]):
|
||
|
|
status = 1
|
||
|
|
|
||
|
|
return status
|
||
|
|
|
||
|
|
def get_psu_presence(self, index):
|
||
|
|
"""
|
||
|
|
Retrieves the presence status of power supply unit (PSU) defined
|
||
|
|
by index <index>
|
||
|
|
:param index: An integer, index of the PSU of which to query status
|
||
|
|
:return: Boolean, True if PSU is plugged, False if not
|
||
|
|
"""
|
||
|
|
status = 0
|
||
|
|
mask = [ 0x01, 0x02 ]
|
||
|
|
attr_file ='cpld_pw_abs'
|
||
|
|
attr_path = self.PSU_CPLD_DIR +'/'+ attr_file
|
||
|
|
|
||
|
|
attr_value = self.get_attr_value(attr_path)
|
||
|
|
|
||
|
|
if (attr_value != 'ERR'):
|
||
|
|
attr_value = int(attr_value, 16)
|
||
|
|
# Check for PSU presence
|
||
|
|
if (~attr_value & mask[index-1]):
|
||
|
|
status = 1
|
||
|
|
|
||
|
|
return status
|
||
|
|
|