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[DellEMC] S6100 I2C Enumeration Segregation #4312

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Merged
sujinmkang merged 1 commit into from
Mar 24, 2020
Merged

[DellEMC] S6100 I2C Enumeration Segregation #4312

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2 changes: 2 additions & 0 deletions platform/broadcom/sonic-platform-modules-dell/debian/platform-modules-s6100.install
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
s6100/scripts/iom_power_*.sh usr/local/bin
s6100/scripts/s6100_platform.sh usr/local/bin
s6100/scripts/s6100_i2c_enumeration.sh usr/local/bin
common/dell_i2c_utils.sh usr/local/bin
common/io_rd_wr.py usr/local/bin
common/nvram_rd_wr.py usr/local/bin
Expand All @@ -17,6 +18,7 @@ s6100/scripts/sensors usr/bin
s6100/systemd/platform-modules-s6100.service etc/systemd/system
s6100/systemd/s6100-lpc-monitor.service etc/systemd/system
s6100/systemd/s6100-reboot-cause.service etc/systemd/system
s6100/systemd/s6100-i2c-enumerate.service etc/systemd/system
tools/flashrom/flashrom usr/local/bin/
common/fw-updater usr/local/bin
common/onie_mode_set usr/local/bin
263 changes: 263 additions & 0 deletions platform/broadcom/sonic-platform-modules-dell/s6100/scripts/s6100_i2c_enumeration.sh
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Original file line number Diff line number Diff line change
@@ -0,0 +1,263 @@
#!/bin/bash

### DellEMC S6100 I2C MUX Enumeration script

source dell_i2c_utils.sh

init_devnum() {
found=0
for devnum in 0 1; do
devname=`cat /sys/bus/i2c/devices/i2c-${devnum}/name`
# iSMT adapter can be at either dffd0000 or dfff0000
if [[ $devname == 'SMBus iSMT adapter at '* ]]; then
found=1
break
fi
done

[[ $found -eq 0 ]] && echo "cannot find iSMT" && exit 1
}

# Attach/Detach CPU board mux @ 0x70
cpu_board_mux() {
case $1 in
"new_device") i2c_mux_create pca9547 0x70 $devnum 2
;;
"delete_device") i2c_mux_delete 0x70 $devnum
;;
*) echo "s6100_platform: cpu_board_mux: invalid command !"
;;
esac
}

# Attach/Detach Switchboard MUX @ 0x71
switch_board_mux() {
case $1 in
"new_device") i2c_mux_create pca9548 0x71 4 10
;;
"delete_device") i2c_mux_delete 0x71 4
;;
*) echo "s6100_platform: switch_board_mux : invalid command !"
;;
esac
}

# Attach/Detach syseeprom on CPU board
sys_eeprom() {
case $1 in
"new_device") i2c_config "echo 24c02 0x50 > /sys/bus/i2c/devices/i2c-2/$1"
;;
"delete_device") i2c_config "echo 0x50 > /sys/bus/i2c/devices/i2c-2/$1"
;;
*) echo "s6100_platform: sys_eeprom : invalid command !"
;;
esac
}

#Attach/Detach eeprom on each IOM
switch_board_eeprom() {
case $1 in
"new_device")
for ((i=14;i<=17;i++));
do
i2c_config "echo 24c02 0x50 > /sys/bus/i2c/devices/i2c-$i/$1"
done
;;
"delete_device")
for ((i=14;i<=17;i++));
do
i2c_config "echo 0x50 > /sys/bus/i2c/devices/i2c-$i/$1"
done
;;
*) echo "s6100_platform: switch_board_eeprom : invalid command !"
;;
esac
}

#Attach/Detach CPLD devices to drivers for each IOM
switch_board_cpld() {
case $1 in
"new_device")
for ((i=14;i<=17;i++));
do
i2c_config "echo dell_s6100_iom_cpld 0x3e > /sys/bus/i2c/devices/i2c-$i/$1"
done
;;
"delete_device")
for ((i=14;i<=17;i++));
do
i2c_config "echo 0x3e > /sys/bus/i2c/devices/i2c-$i/$1"
done
;;
*) echo "s6100_platform: switch_board_cpld : invalid command !"
;;
esac
}

#Attach/Detach the MUX connecting all QSFPs on each IOM @0x71 and 0x72
switch_board_qsfp_mux() {
case $1 in
"new_device")
# The mux for the QSFPs spawn {18..25}, {26..33}... {74..81}
# starting at chennel 18 and 16 channels per IOM.
channel_first=18
for ((i=9;i>=6;i--));
do
# 0x71 mux on the IOM 1
mux_index=$(expr $i - 5)
echo "Attaching PCA9548 $mux_index"
i2c_mux_create pca9548 0x71 $i $channel_first
i2c_mux_create pca9548 0x72 $i $(expr $channel_first + 8)
channel_first=$(expr $channel_first + 16)
done
;;
"delete_device")
for ((i=9;i>=6;i--));
do
# 0x71 mux on the IOM 1
mux_index=$(expr $i - 5)
echo "Detaching PCA9548 $mux_index"
i2c_mux_delete 0x71 $i
i2c_mux_delete 0x72 $i
done
;;
*) echo "s6100_platform: switch_board_qsfp_mux: invalid command !"
;;
esac
}

#Attach/Detach the SFP modules on PCA9548_2
switch_board_sfp() {
case $1 in
"new_device") i2c_config "echo optoe2 0x50 > /sys/bus/i2c/devices/i2c-11/$1"
i2c_config "echo optoe2 0x50 > /sys/bus/i2c/devices/i2c-12/$1"
;;
"delete_device") i2c_config "echo 0x50 > /sys/bus/i2c/devices/i2c-11/$1"
i2c_config "echo 0x50 > /sys/bus/i2c/devices/i2c-12/$1"
;;
*) echo "s6100_platform: switch_board_sfp: invalid command !"
;;
esac
}

#Add/Delete ($1) a range ($2..$3) of QSFPs
qsfp_device_mod() {
case $1 in
"new_device") for ((i=$2;i<=$3;i++));
do
i2c_config "echo optoe1 0x50 > /sys/bus/i2c/devices/i2c-$i/$1"
done
;;
"delete_device") for ((i=$2;i<=$3;i++));
do
i2c_config "echo 0x50 > /sys/bus/i2c/devices/i2c-$i/$1"
done
;;
*) echo "s6100_platform: qsfp_device_mod: invalid command $1:$2,$3!"
;;
esac
}

# Attach/Detach 16 instances of QSFP ports on each IO modules
# eeprom can dump data using below command
switch_board_qsfp() {
if i2c_poll_bus_exists "/sys/bus/i2c/devices/i2c-18"; then
qsfp_device_mod $1 18 33
fi

if i2c_poll_bus_exists "/sys/bus/i2c/devices/i2c-34"; then
qsfp_device_mod $1 34 49
fi

if i2c_poll_bus_exists "/sys/bus/i2c/devices/i2c-50"; then
qsfp_device_mod $1 50 65
fi

if i2c_poll_bus_exists "/sys/bus/i2c/devices/i2c-66"; then
qsfp_device_mod $1 66 81
fi
}

# Enable/Disable low power mode on all QSFP ports
switch_board_qsfp_lpmode() {
case $1 in
"enable") value=0xffff
;;
"disable") value=0x0
;;
*) echo "s6100_platform: switch_board_qsfp_lpmode: invalid command $1!"
return
;;
esac
echo $value > /sys/class/i2c-adapter/i2c-14/14-003e/qsfp_lpmode
echo $value > /sys/class/i2c-adapter/i2c-15/15-003e/qsfp_lpmode
echo $value > /sys/class/i2c-adapter/i2c-16/16-003e/qsfp_lpmode
echo $value > /sys/class/i2c-adapter/i2c-17/17-003e/qsfp_lpmode
}

# Enable/Disable xcvr presence interrupts
xcvr_presence_interrupts() {
case $1 in
"enable")
for ((i=14;i<=17;i++));
do
echo 0x0 > /sys/class/i2c-adapter/i2c-$i/$i-003e/qsfp_abs_mask
done
;;
"disable")
for ((i=14;i<=17;i++));
do
echo 0xffff > /sys/class/i2c-adapter/i2c-$i/$i-003e/qsfp_abs_mask
done
;;
*) echo "s6100_platform: xcvr_presence_interrupts: invalid command !"
;;
esac
}

# Reset the mux tree
reset_muxes() {
local i

# Reset the IOM muxes (if they have been already instantiated)
for ((i=14;i<=17;i++));
do
if [[ -e /sys/class/i2c-adapter/i2c-$i/$i-003e ]]; then
echo 0xfc > /sys/class/i2c-adapter/i2c-$i/$i-003e/sep_reset
echo 0xff > /sys/class/i2c-adapter/i2c-$i/$i-003e/sep_reset
fi
done

# Reset the switch card PCA9548A
io_rd_wr.py --set --val 0xef --offset 0x110
io_rd_wr.py --set --val 0xff --offset 0x110

# Reset the CPU Card PCA9547
io_rd_wr.py --set --val 0xfd --offset 0x20b
io_rd_wr.py --set --val 0xff --offset 0x20b
}

init_devnum

if [[ "$1" == "init" ]]; then
cpu_board_mux "new_device"
switch_board_mux "new_device"
sys_eeprom "new_device"
switch_board_eeprom "new_device"
switch_board_cpld "new_device"
switch_board_qsfp_mux "new_device"
switch_board_sfp "new_device"
switch_board_qsfp "new_device"
switch_board_qsfp_lpmode "disable"
xcvr_presence_interrupts "enable"
elif [[ "$1" == "deinit" ]]; then
xcvr_presence_interrupts "disable"
switch_board_sfp "delete_device"
switch_board_cpld "delete_device"
switch_board_eeprom "delete_device"
switch_board_mux "delete_device"
sys_eeprom "delete_device"
switch_board_qsfp "delete_device"
switch_board_qsfp_mux "delete_device"
cpu_board_mux "delete_device"
fi
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