meta-gsj: quanta-nvme-powerctrl: add shared script
Add shared nvme_powerctrl_library script for mantain function
It could be easy review steps with specification.
Change-Id: Iedab2fb8f3518a607cb08fb755a9de8b0f5ee249
Signed-off-by: Samuel Jiang <Samuel.Jiang@quantatw.com>
diff --git a/meta-gsj/recipes-gsj/quanta-nvme-powerctrl/files/nvme_powerctrl_library.sh b/meta-gsj/recipes-gsj/quanta-nvme-powerctrl/files/nvme_powerctrl_library.sh
new file mode 100644
index 0000000..3737aac
--- /dev/null
+++ b/meta-gsj/recipes-gsj/quanta-nvme-powerctrl/files/nvme_powerctrl_library.sh
@@ -0,0 +1,63 @@
+#!/bin/bash
+
+U2_PRESENT=( 148 149 150 151 152 153 154 155 )
+POWER_U2=( 195 196 202 199 198 197 127 126 )
+PWRGD_U2=( 161 162 163 164 165 166 167 168 )
+RST_BMC_U2=( 72 73 74 75 76 77 78 79 )
+PLUGGED=0
+I2C_BUS=8
+CHIP_ADDR=0x68
+CLOCK_GEN_VALUE=$(i2cget -y $I2C_BUS $CHIP_ADDR 0 i 2|cut -f3 -d' ')
+
+function set_gpio_direction()
+{
+ #$1 gpio pin, $2 'in','high','low'
+ echo $2 > /sys/class/gpio/gpio$1/direction
+}
+
+function read_gpio_input()
+{
+ #$1 read input gpio pin
+ echo $(cat /sys/class/gpio/gpio$1/value)
+}
+
+function enable_nvme_power()
+{
+ set_gpio_direction "${POWER_U2[$1]}" "high"
+ sleep 0.04
+ check_powergood $1
+}
+
+function check_powergood()
+{
+ if [ $(read_gpio_input ${PWRGD_U2[$1]}) == 1 ];then
+ sleep 0.005
+ update_clock_gen_chip_register $1 1
+ sleep 0.1
+ set_gpio_direction "${RST_BMC_U2[$1]}" "high"
+ else
+ disable_nvme_power $1
+ fi
+}
+
+function disable_nvme_power()
+{
+ set_gpio_direction "${RST_BMC_U2[$1]}" "low"
+ sleep 0.1
+ update_clock_gen_chip_register $1 0
+ sleep 0.005
+ set_gpio_direction "${POWER_U2[$1]}" "low"
+}
+
+function update_clock_gen_chip_register(){
+ #$1 nvme slot number, $2 enable/disable
+ update_value=$(printf '%x\n' "$((0x01 <<$1))")
+ if [ $2 -eq 1 ];then
+ CLOCK_GEN_VALUE=$(printf '0x%x\n' \
+ "$(($CLOCK_GEN_VALUE | 0x$update_value))")
+ else
+ CLOCK_GEN_VALUE=$(printf '0x%x\n' \
+ "$(($CLOCK_GEN_VALUE & ~0x$update_value))")
+ fi
+ i2cset -y $I2C_BUS $CHIP_ADDR 0 $CLOCK_GEN_VALUE s
+}