1 files changed, 74 insertions, 0 deletions
diff --git a/meta-ampere/meta-jade/recipes-phosphor/gpio/psu-hotswap-reset/ampere_psu_reset_hotswap.sh b/meta-ampere/meta-jade/recipes-phosphor/gpio/psu-hotswap-reset/ampere_psu_reset_hotswap.sh
new file mode 100644
index 000000000..65bff9dc1
--- /dev/null
+++ b/meta-ampere/meta-jade/recipes-phosphor/gpio/psu-hotswap-reset/ampere_psu_reset_hotswap.sh
@@ -0,0 +1,74 @@
+#!/bin/sh
+
+# When system only use single PSU ( ex : PSU1 ) to power ON normal 12V,
+# HSC2 will be trigged Fault event (FET health).
+# At this time, to plug-in PSU2 in system, PSU2 won't deliver power to
+# +12V_MB because HSC2 is protected by Fault event.
+# Due to HSC2 protected, the PSU redundancy mechanism can't be created.
+# Once PSU1 is plugged out at this moment, system will crash ( reset )
+# because +12V_MB dropped.
+
+# BMC SW work-around solution:
+# - When BMC detect event PSU is plugged in system, BMC will reset HSC
+# by disbale HOT SWAP and then enable HOT SWAP through pmbus command to clear
+# Fault event.
+
+# Note:
+# In case hot swap occurs during BMC reset, BMC still not in operation state,
+# BMC can't detect PSU plug/unplug, then the work-around won't be executed
+
+# Author: Chanh Nguyen <chnguyen@amperecomputing.com>
+
+HSC1_PMBUS_NUM=10
+HSC2_PMBUS_NUM=10
+HSC1_SLAVE_ADDR=0x10
+HSC2_SLAVE_ADDR=0x11
+OPERATION=0x01
+STATUS_MFR_SPECIFIC=0x80
+
+# $1 will be the name of the psu
+PSU=$1
+
+if [[ $PSU == 1 ]]; then
+	HSC_PMBUS_NUM=$HSC1_PMBUS_NUM
+	HSC_SLAVE_ADDR=$HSC1_SLAVE_ADDR
+elif [[ $PSU == 2 ]]; then
+	HSC_PMBUS_NUM=$HSC2_PMBUS_NUM
+	HSC_SLAVE_ADDR=$HSC2_SLAVE_ADDR
+else
+	echo "Please choose PSU1 (1) or PSU2 (2)"
+	echo "Ex: ampere_psu_reset_hotswap.sh 1"
+	exit 0
+fi
+
+# Check HOST state
+chassisstate=$(obmcutil chassisstate | awk -F. '{print $NF}')
+if [[ "$chassisstate" == 'Off' ]]; then
+	echo "HOST is being OFF, so can't access the i2c $HSC_PMBUS_NUM. Please Turn ON HOST !"
+	exit 1
+fi
+
+# Check FET health problems
+data=$(i2cget -f -y $HSC_PMBUS_NUM $HSC_SLAVE_ADDR $STATUS_MFR_SPECIFIC)
+
+if [[ $? -ne 0 ]]; then
+	echo "ERROR: Can't access the i2c. Please check /dev/i2c-$HSC_PMBUS_NUM"
+	exit 1
+fi
+
+psu_sts=$(((data & 0x80) != 0))
+
+if [[ $psu_sts == 1 ]]; then
+	echo "PSU $PSU: FET health problems have been detected"
+	echo "Reset Hot swap output on PSU $PSU"
+	# Disable Hot swap output
+	write_data=0x00
+	i2cset -f -y $HSC_PMBUS_NUM $HSC_SLAVE_ADDR $OPERATION $write_data b
+
+	# Enable Hot swap output
+	write_data=0x80;
+	i2cset -f -y $HSC_PMBUS_NUM $HSC_SLAVE_ADDR $OPERATION $write_data b
+
+else
+	echo "PSU $PSU: FET health problems have not been detected"
+fi
+\ No newline at end of file