meta-ampere: mtmitchell: support IPMI OEM command enable Scan Dump

Support Enable/Disable scandump mode, this mode will stop SoC monitorring
mode. This mode will be recoved after A/C the system.

Tested:
1. Get scandump mode status
   $ ipmitool raw 0x3c 0x26
     00
2. Enable scandump mode
   $ ipmitool raw 0x3c 0x25 0x01
3. Get scandump mode status
   $ ipmitool raw 0x3c 0x26
     01
4. Check if system firmware hang service is disabled.
5. Check there is no Eventlog from Host is created
6. Disable scandump mode
   $ ipmitool raw 0x3c 0x25 0x00
7. Check if system firmware hang service is enabled
8. This will be recoved after A/C the system.

Signed-off-by: Hieu Huynh <[email protected]>

meta-ampere/meta-mitchell/recipes-ampere/platform/ampere-utils.bbappend

@@ -11,6 +11,7 @@ SRC_URI:append = " \
            file://ampere_fanctrl.sh \
            file://ampere_pldm_effecter_trigger.sh \
            file://ampere_spi_util.sh \
+           file://ampere_scandump_mode.sh \
           "
 
 do_install:append() {
@@ -23,4 +24,5 @@ do_install:append() {
     install -m 0755 ${WORKDIR}/ampere_fanctrl.sh ${D}/${sbindir}/
     install -m 0755 ${WORKDIR}/ampere_pldm_effecter_trigger.sh ${D}/${sbindir}/
     install -m 0755 ${WORKDIR}/ampere_spi_util.sh ${D}/${sbindir}/
+    install -m 0755 ${WORKDIR}/ampere_scandump_mode.sh ${D}/${sbindir}/
 }

meta-ampere/meta-mitchell/recipes-ampere/platform/ampere-utils/ampere_scandump_mode.sh

@@ -0,0 +1,94 @@
+#!/bin/bash
+
+# Helper script to support enable/disable Scandump Mode
+# Author : Hieu Huynh ([email protected])
+#
+# To enable Scandump mode:
+#    ampere_scandump_mode.sh enable
+#
+# To disable Scandump mode:
+#    ampere_scandump_mode.sh disable
+#
+# To get Scandump mode status:
+#    ampere_scandump_mode.sh getstatus
+
+enable_scandump_mode() {
+	echo "Enable Scandump mode"
+	# Disable Mpro hang detection
+	systemctl stop ampere-sysfw-hang-handler.service
+
+	# Disable PLDM service
+	systemctl stop pldmd.service
+
+	# Enable scandump mode in CPLD
+	# Get Port0 value
+	p0_val=$(i2cget -f -y 15 0x22 0x02)
+	p0_val=$(("$p0_val" | (1 << 4)))
+	# Set Port0[4] value to "1" to mask all CPU’s GPIOs, set Port0[4].
+	i2cset -f -y 15 0x22 0x02 $p0_val
+
+	p0_IOexp_val=$(i2cget -f -y 15 0x22 0x06)
+	p0_IOexp_val=$(("$p0_IOexp_val" & ~(1 << 4)))
+	# Config CPLD's IOepx Port0[4] from input to output, clear IOepx Port0[4].
+	i2cset -f -y 15 0x22 0x06 $p0_IOexp_val
+}
+
+diable_scandump_mode() {
+	echo "Disable Scandump mode"
+
+	# Disable scandump mode in CPLD
+	# Get Port0 value
+	p0_val=$(i2cget -f -y 15 0x22 0x02)
+	p0_val=$(("$p0_val" & ~(1 << 4)))
+	# Set Port0[4] value to "0" to unmask all CPU’s GPIOs, clear Port0[4].
+	i2cset -f -y 15 0x22 0x02 $p0_val
+
+	p0_IOexp_val=$(i2cget -f -y 15 0x22 0x06)
+	p0_IOexp_val=$(("$p0_IOexp_val" | (1 << 4)))
+	# Config CPLD's IOepx Port0[4] from output to input, set IOepx Port0[4].
+	i2cset -f -y 15 0x22 0x06 $p0_IOexp_val
+
+	# Enable Mpro hang detection
+	systemctl start ampere-sysfw-hang-handler.service
+
+	# Enable PLDM service
+	systemctl start pldmd.service
+}
+
+getstatus() {
+	# Get CPLD's IOepx Port0[4], if this bit is "0" scandump mode is enabled.
+	p0_IOexp_val=$(i2cget -f -y 15 0x22 0x06)
+	p0_IOexp_val=$(("$p0_IOexp_val" & (1 << 4)))
+	if [[ "$p0_IOexp_val" == "0" ]]; then
+		echo "Scandump mode is enabled"
+		exit 1
+	else
+		echo "Scandump mode is disabled"
+		exit 0
+	fi
+}
+
+# Usage of this utility
+usage() {
+	echo "Usage:"
+	echo "  - To enable Scandump mode"
+	echo "     $(basename "$0") enable"
+	echo "  - To disable Scandump mode"
+	echo "     $(basename "$0") disable"
+	echo "  - To get Scandump mode status"
+	echo "     $(basename "$0") getstatus"
+	exit 0
+}
+
+if [[ $1 == "enable" ]]; then
+	enable_scandump_mode
+elif [[ $1 == "disable" ]]; then
+	diable_scandump_mode
+elif [[ $1 == "getstatus" ]]; then
+	getstatus
+else
+	echo "Invalid mode"
+	usage
+fi
+
+exit 0