diff options
Diffstat (limited to 'meta-ampere/meta-jade/recipes-phosphor/gpio/psu-hotswap-reset/ampere_psu_reset_hotswap.sh')
-rw-r--r-- | meta-ampere/meta-jade/recipes-phosphor/gpio/psu-hotswap-reset/ampere_psu_reset_hotswap.sh | 74 |
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
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