diff options
Diffstat (limited to 'meta-facebook/meta-wedge/recipes-wedge/fbutils/files/ast-functions')
| -rw-r--r-- | meta-facebook/meta-wedge/recipes-wedge/fbutils/files/ast-functions | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/meta-facebook/meta-wedge/recipes-wedge/fbutils/files/ast-functions b/meta-facebook/meta-wedge/recipes-wedge/fbutils/files/ast-functions new file mode 100644 index 0000000..dd53ad1 --- /dev/null +++ b/meta-facebook/meta-wedge/recipes-wedge/fbutils/files/ast-functions @@ -0,0 +1,222 @@ +# Copyright 2014-present Facebook. All Rights Reserved. +DEVMEM=/sbin/devmem + +devmem_set_bit() { + local addr + local val + addr=$1 + val=$($DEVMEM $addr) + val=$((val | (0x1 << $2))) + $DEVMEM $addr 32 $val +} + +devmem_clear_bit() { + local addr + local val + addr=$1 + val=$($DEVMEM $addr) + val=$((val & ~(0x1 << $2))) + $DEVMEM $addr 32 $val +} + +scu_addr() { + echo $((0x1E6E2000 + 0x$1)) +} + +GPIODIR="/sys/class/gpio" +GPIOEXPORT="$GPIODIR/export" + +gpio_dir() { + echo "$GPIODIR/gpio$1" +} + +gpio_name2value() { + local first remaining base val + remaining=$1 + val=0 + while [ -n "$remaining" ]; do + first=${remaining:0:1} + case "$first" in + [[:lower:]]) + base=$(printf "%d" "'$first'") + base=$((base - 96)) + val=$((val * 26 + base)) + ;; + [[:upper:]]) + base=$(printf "%d" "'$first'") + base=$((base - 64)) + val=$((val * 26 + base)) + ;; + *) + if [ $val -gt 0 ]; then + val=$((val-1)) + fi + val=$((val * 8 + $remaining)) + break + ;; + esac + remaining=${remaining:1} + done + echo "$val" +} + +gpio_export() { + local gpio + gpio=$(gpio_name2value $1) + dir=$(gpio_dir $gpio) + if [ ! -d ${dir} ]; then + echo $gpio > $GPIOEXPORT + fi +} + +gpio_set() { + local gpio + local val + gpio=$(gpio_name2value $1) + val=$2 + dir=$(gpio_dir $gpio) + if [ ! -d ${dir} ]; then + echo $gpio > $GPIOEXPORT + fi + echo out > ${dir}/direction + echo $val > ${dir}/value +} + +gpio_get() { + local gpio + local val + gpio=$(gpio_name2value $1) + dir=$(gpio_dir $gpio) + if [ ! -d ${dir} ]; then + echo $gpio > $GPIOEXPORT + fi + echo in > ${dir}/direction + cat ${dir}/value +} + +wedge_iso_buf_enable() { + # GPIOC2 (18) to low, SCU90[0] and SCU90[24] must be 0 + devmem_clear_bit $(scu_addr 90) 0 + devmem_clear_bit $(scu_addr 90) 24 + gpio_set 18 0 +} + +wedge_iso_buf_disable() { + # GPIOC2 (18) to low, SCU90[0] and SCU90[24] must be 0 + devmem_clear_bit $(scu_addr 90) 0 + devmem_clear_bit $(scu_addr 90) 24 + gpio_set 18 1 +} + +wedge_is_us_on() { + local val n retries prog + if [ $# -gt 0 ]; then + retries="$1" + else + retries=1 + fi + if [ $# -gt 1 ]; then + prog="$2" + else + prog="" + fi + n=1 + while true; do + val=$(cat /sys/class/i2c-adapter/i2c-4/4-0040/gpio_inputs 2>/dev/null) + if [ -n "$val" ]; then + break + fi + n=$((n+1)) + if [ $n -gt $retries ]; then + echo -n " failed to read GPIO. " + val=0 + break + fi + echo -n "$prog" + sleep 1 + done + if [ "$((val & (0x1 << 14)))" != "0" ]; then + # powered on already + return 0 + else + return 1 + fi +} + + +# Return the board type, 'LC', 'FC-LEFT', 'FC-RIGHT', or, 'WEDGE' +wedge_board_type() { + local pn + pn=$(/usr/bin/weutil 2> /dev/null | grep -i '^Location on Fabric:') + case "$pn" in + *LEFT*) + echo 'FC-LEFT' + ;; + *RIGHT*) + echo 'FC-RIGHT' + ;; + *LC*) + echo 'LC' + ;; + *) + echo 'WEDGE' + ;; + esac +} + +# On FC, FAB_SLOT_ID (GPIOU0), low == FC0; high == FC1 +# On LC, Wedge, +# board rev < 3: +# GPIOU0(ID0), GPIOU1(ID1), GPIOU2(ID2), GPIOU3(ID3) +# else: +# GPIOU6(ID0), GPIOU7(ID1), GPIOV0(ID2), GPIOV1(ID3) +# +# ID[2:0] ID3 Slot# +# 000 0 1 +# 000 1 2 +# 001 0 3 +# 001 1 4 +# 010 0 5 +# 010 1 6 +# 011 0 7 +# 011 1 8 + +wedge_slot_id() { + local type slot id3 id2 id1 id0 FC_CARD_BASE board_rev + FC_CARD_BASE=65 + if [ "$1" = "FC-LEFT" ]; then + # fabric card left + slot=$(gpio_get U0) + slot=$((FC_CARD_BASE + slot * 2)) + elif [ "$1" = "FC-RIGHT" ]; then + # fabric card right + slot=$(gpio_get U0) + slot=$((FC_CARD_BASE + slot * 2 + 1)) + else + # either edge or LC + # need to check the board rev + board_rev=$(wedge_board_rev) + if [ $board_rev -lt 3 ]; then + id0=$(gpio_get U0) + id1=$(gpio_get U1) + id2=$(gpio_get U2) + id3=$(gpio_get U3) + else + id0=$(gpio_get U6) + id1=$(gpio_get U7) + id2=$(gpio_get V0) + id3=$(gpio_get V1) + fi + slot=$(((id2 * 4 + id1 * 2 + id0) * 2 + id3 + 1)) + fi + echo "$slot" +} + +# wedge_board_rev() is only valid after GPIO Y0, Y1, and Y2 are enabled +wedge_board_rev() { + local val0 val1 val2 + val0=$(cat /sys/class/gpio/gpio192/value 2>/dev/null) + val1=$(cat /sys/class/gpio/gpio193/value 2>/dev/null) + val2=$(cat /sys/class/gpio/gpio194/value 2>/dev/null) + echo $((val0 | (val1 << 1) | (val2 << 2))) +} |
