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Diffstat (limited to 'meta-quanta/meta-gbs/recipes-gbs/gbs-sysinit/files/gbs-gpio-common.sh')
| -rw-r--r-- | meta-quanta/meta-gbs/recipes-gbs/gbs-sysinit/files/gbs-gpio-common.sh | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/meta-quanta/meta-gbs/recipes-gbs/gbs-sysinit/files/gbs-gpio-common.sh b/meta-quanta/meta-gbs/recipes-gbs/gbs-sysinit/files/gbs-gpio-common.sh new file mode 100644 index 000000000..55f631a5d --- /dev/null +++ b/meta-quanta/meta-gbs/recipes-gbs/gbs-sysinit/files/gbs-gpio-common.sh @@ -0,0 +1,165 @@ +#!/bin/bash +# Copyright 2020 Google LLC +# Copyright 2020 Quanta Computer Inc. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +# +# Common GPIO functions. + +# Map names of GPIOs to GPIO number +declare -A GPIO_NAMES_TO_NUMBER=( + ['RST_BMC_PHY_N']=15 + ['BMC_BRD_REV_ID6']=37 + ['BMC_BRD_REV_ID5']=38 + ['BMC_BRD_SKU_ID3']=39 + ['BMC_BRD_SKU_ID2']=40 + ['FM_BMC_CPU_UART_EN']=76 + ['RST_BMC_RSMRST_N']=87 + ['RST_KBRST_BMC_CPLD_N']=94 + ['FAN_BRD_REV_ID0']=122 + ['FAN_BRD_REV_ID1']=123 + ['HSBP_BRD_REV_ID3']=124 + ['HSBP_BRD_REV_ID2']=125 + ['HSBP_BRD_REV_ID1']=126 + ['BMC_BRD_REV_ID0']=136 + ['BMC_BRD_REV_ID1']=137 + ['BMC_BRD_REV_ID2']=138 + ['BMC_BRD_REV_ID3']=139 + ['BMC_BRD_REV_ID4']=140 + ['BMC_BRD_SKU_ID0']=141 + ['BMC_BRD_SKU_ID1']=142 + ['HDD_PRSNT_N']=160 + ['SPI_SW_SELECT']=169 + ['BMC_BRD_REV_ID7']=194 + ['HSBP_BRD_REV_ID0']=196 +) + +# 1 is active_low 0 is active_high +declare -A GPIO_NAMES_TO_ACTIVE_LOW=( + ['RST_BMC_PHY_N']=1 + ['BMC_BRD_REV_ID6']=0 + ['BMC_BRD_REV_ID5']=0 + ['BMC_BRD_SKU_ID3']=0 + ['BMC_BRD_SKU_ID2']=0 + ['FM_BMC_CPU_UART_EN']=0 + ['RST_BMC_RSMRST_N']=1 + ['RST_KBRST_BMC_CPLD_N']=1 + ['FAN_BRD_REV_ID0']=0 + ['FAN_BRD_REV_ID1']=0 + ['HSBP_BRD_REV_ID3']=0 + ['HSBP_BRD_REV_ID2']=0 + ['HSBP_BRD_REV_ID1']=0 + ['BMC_BRD_REV_ID0']=0 + ['BMC_BRD_REV_ID1']=0 + ['BMC_BRD_REV_ID2']=0 + ['BMC_BRD_REV_ID3']=0 + ['BMC_BRD_REV_ID4']=0 + ['BMC_BRD_SKU_ID0']=0 + ['BMC_BRD_SKU_ID1']=0 + ['HDD_PRSNT_N']=1 + ['SPI_SW_SELECT']=0 + ['BMC_BRD_REV_ID7']=0 + ['HSBP_BRD_REV_ID0']=0 +) + +################################################## +# Initializes the gpio state +# This operation is idempotent and can be applied +# repeatedly to the same gpio. It will make sure the +# gpio ends up in the initialized state even if it +# was. +# Arguments: +# $1: GPIO name +# Return: +# 0 if success, non-zero if error +################################################## +init_gpio() { + if (( $# != 1 )); then + echo "Usage: init_gpio name" >&2 + return 1 + fi + + local name=$1 + + local number=${GPIO_NAMES_TO_NUMBER["${name}"]} + if [[ -z ${number} ]]; then + echo "Missing number info for: ${name}" >&2 + return 2 + fi + + local active_low=${GPIO_NAMES_TO_ACTIVE_LOW["${name}"]} + if [[ -z ${active_low} ]]; then + echo "Missing active_low info for: ${name}" >&2 + return 2 + fi + + if [[ ! -e "/sys/class/gpio/gpio${number}" ]]; then + echo "${number}" >'/sys/class/gpio/export' + fi + echo "${active_low}" >"/sys/class/gpio/gpio${number}/active_low" +} + +################################################## +# Set output GPIO direction. +# Arguments: +# $1: GPIO name +# $2: GPIO direction, "high" or "low" +# Return: +# 0 if success, non-zero if error +################################################## +set_gpio_direction() { + if (( $# != 2 )); then + echo 'Usage: set_gpio_direction name direction' >&2 + return 1 + fi + + local name=$1 + local direction=$2 + + local number=${GPIO_NAMES_TO_NUMBER["${name}"]} + if [[ -z ${number} ]]; then + echo "Missing number info for: ${name}" >&2 + return 2 + fi + + init_gpio "${name}" || return + echo "${direction}" >"/sys/class/gpio/gpio${number}/direction" + echo "Set gpio ${name} #${number} to direction ${direction}" >&2 +} + +################################################## +# Get GPIO value +# Arguments: +# $1: GPIO name +# Return: +# 0 if success, non-zero if error +# stdout: The value of the gpio +################################################## +get_gpio_value() { + if (( $# != 1 )); then + echo 'Usage: get_gpio_value name' >&2 + return 1 + fi + + local name=$1 + + local number=${GPIO_NAMES_TO_NUMBER["${name}"]} + if [[ -z ${number} ]]; then + echo "Missing number info for: ${name}" >&2 + return 2 + fi + + init_gpio "${name}" || return + cat "/sys/class/gpio/gpio${number}/value" +} |