Thang Q. Nguyen | fe4a607 | 2023-06-09 08:55:58 +0700 | [diff] [blame^] | 1 | #!/bin/bash |
| 2 | |
| 3 | # shellcheck disable=SC2046 |
| 4 | # shellcheck source=meta-ampere/meta-mitchell/recipes-ampere/platform/ampere-platform-init/gpio-lib.sh |
| 5 | source /usr/sbin/gpio-lib.sh |
| 6 | |
| 7 | spi_address="1e630000.spi" |
| 8 | spi_bind="/sys/bus/platform/drivers/spi-aspeed-smc/bind" |
| 9 | spi_unbind="/sys/bus/platform/drivers/spi-aspeed-smc/unbind" |
| 10 | spi_lock="/run/platform/spi.lock" |
| 11 | spi_lock_dir="/run/platform" |
| 12 | |
| 13 | bind_aspeed_smc_driver() { |
| 14 | if [ -f "${spi_lock}" ]; then |
| 15 | pid=$1 |
| 16 | pid_lock=$(cat "${spi_lock}") |
| 17 | if [[ "${pid}" != "${pid_lock}" ]]; then |
| 18 | echo "SPI-NOR resoure is lock by process $pid_lock" |
| 19 | return 1 |
| 20 | fi |
| 21 | fi |
| 22 | |
| 23 | # BMC access SPI-NOR resource |
| 24 | gpio_name_set spi0-program-sel 1 |
| 25 | sleep 0.1 |
| 26 | echo "Bind the ASpeed SMC driver" |
| 27 | echo "${spi_address}" > "${spi_bind}" 2>/dev/null |
| 28 | # Check the HNOR partition available |
| 29 | HOST_MTD=$(< /proc/mtd grep "pnor" | sed -n 's/^\(.*\):.*/\1/p') |
| 30 | if [ -z "$HOST_MTD" ]; then |
| 31 | echo "${spi_address}" > "${spi_unbind}" |
| 32 | sleep 0.1 |
| 33 | echo "${spi_address}" > "${spi_bind}" |
| 34 | fi |
| 35 | # BMC release SPI-NOR resource |
| 36 | gpio_name_set spi0-program-sel 0 |
| 37 | return 0 |
| 38 | } |
| 39 | |
| 40 | unbind_aspeed_smc_driver() { |
| 41 | if [ -f "${spi_lock}" ]; then |
| 42 | pid=$1 |
| 43 | pid_lock=$(cat "${spi_lock}") |
| 44 | if [[ "${pid}" != "${pid_lock}" ]]; then |
| 45 | echo "SPI-NOR resoure is lock by process $pid_lock . Wait 10s" |
| 46 | # Wait maximum 10 seconds for unlock SPI-NOR |
| 47 | cnt=10 |
| 48 | while [ $cnt -gt 0 ] |
| 49 | do |
| 50 | if [ -f "${spi_lock}" ]; then |
| 51 | sleep 1 |
| 52 | cnt=$((cnt - 1)) |
| 53 | else |
| 54 | break |
| 55 | fi |
| 56 | done |
| 57 | if [ "$cnt" -eq "0" ]; then |
| 58 | echo "Timeout 10 seconds, SPI-NOR still busy. Force unlock to access SPI" |
| 59 | rm -f "${spi_lock}" |
| 60 | fi |
| 61 | fi |
| 62 | fi |
| 63 | |
| 64 | HOST_MTD=$(< /proc/mtd grep "pnor" | sed -n 's/^\(.*\):.*/\1/p') |
| 65 | if [ -n "$HOST_MTD" ]; then |
| 66 | # If the HNOR partition is available, then unbind driver |
| 67 | # BMC access SPI-NOR resource |
| 68 | gpio_name_set spi0-program-sel 1 |
| 69 | sleep 0.1 |
| 70 | echo "Unbind the ASpeed SMC driver" |
| 71 | echo "${spi_address}" > "${spi_unbind}" |
| 72 | fi |
| 73 | # BMC release SPI-NOR resource |
| 74 | gpio_name_set spi0-program-sel 0 |
| 75 | # Deassert BMC access SPI-NOR pin |
| 76 | gpio_name_set spi-nor-access 0 |
| 77 | sleep 0.5 |
| 78 | return 0 |
| 79 | } |
| 80 | |
| 81 | lock_spi_resource() { |
| 82 | # Wait maximum 10 seconds to lock SPI-NOR |
| 83 | cnt=10 |
| 84 | while [ $cnt -gt 0 ] |
| 85 | do |
| 86 | if [ -f "${spi_lock}" ]; then |
| 87 | sleep 1 |
| 88 | cnt=$((cnt - 1)) |
| 89 | else |
| 90 | echo "$1" > "${spi_lock}" |
| 91 | break |
| 92 | fi |
| 93 | done |
| 94 | |
| 95 | if [ "$cnt" -eq "0" ]; then |
| 96 | echo "Timeout 10 seconds, SPI-NOR is still locked by another process" |
| 97 | return 1 |
| 98 | fi |
| 99 | return 0 |
| 100 | } |
| 101 | |
| 102 | unlock_spi_resource() { |
| 103 | if [ ! -f "${spi_lock}" ]; then |
| 104 | echo "SPI-NOR is already unlocked" |
| 105 | return 0 |
| 106 | fi |
| 107 | |
| 108 | pid=$1 |
| 109 | pid_lock=$(cat "${spi_lock}") |
| 110 | if [[ "${pid}" == "${pid_lock}" ]]; then |
| 111 | rm -f "${spi_lock}" |
| 112 | else |
| 113 | echo "Cannot unlock, SPI-NOR is locked by another process" |
| 114 | return 1 |
| 115 | fi |
| 116 | return 0 |
| 117 | } |
| 118 | |
| 119 | start_handshake_spi() { |
| 120 | if [ -f "${spi_lock}" ]; then |
| 121 | pid=$1 |
| 122 | pid_lock=$(cat "${spi_lock}") |
| 123 | if [[ "${pid}" != "${pid_lock}" ]]; then |
| 124 | echo "SPI-NOR resoure is lock by process $pid_lock" |
| 125 | return 1 |
| 126 | fi |
| 127 | fi |
| 128 | |
| 129 | # Wait maximum 10 seconds to grant access SPI |
| 130 | cnt=10 |
| 131 | while [ $cnt -gt 0 ] |
| 132 | do |
| 133 | spinor_access=$(gpio_name_get soc-spi-nor-access) |
| 134 | if [ "$spinor_access" == "1" ]; then |
| 135 | sleep 1 |
| 136 | cnt=$((cnt - 1)) |
| 137 | else |
| 138 | break |
| 139 | fi |
| 140 | done |
| 141 | |
| 142 | if [ "$cnt" -eq "0" ]; then |
| 143 | echo "Timeout 10 seconds, host is still hold SPI-NOR." |
| 144 | return 1 |
| 145 | fi |
| 146 | echo "Start handshake SPI-NOR" |
| 147 | # Grant BMC access SPI-NOR. The process call the scripts should only |
| 148 | # claim the bus for only maximum period 500ms. |
| 149 | gpio_name_set spi-nor-access 1 |
| 150 | # Switch the Host SPI-NOR to BMC |
| 151 | gpio_name_set spi0-program-sel 1 |
| 152 | } |
| 153 | |
| 154 | stop_handshake_spi() { |
| 155 | if [ -f "${spi_lock}" ]; then |
| 156 | pid=$1 |
| 157 | pid_lock=$(cat "${spi_lock}") |
| 158 | if [[ "${pid}" != "${pid_lock}" ]]; then |
| 159 | echo "SPI-NOR resoure is lock by process $pid_lock" |
| 160 | return 1 |
| 161 | fi |
| 162 | fi |
| 163 | echo "Stop handshake SPI-NOR" |
| 164 | # Switch the Host SPI-NOR to HOST |
| 165 | gpio_name_set spi0-program-sel 0 |
| 166 | # Deassert BMC access SPI-NOR pin |
| 167 | gpio_name_set spi-nor-access 0 |
| 168 | } |
| 169 | |
| 170 | |
| 171 | if [ $# -eq 0 ]; then |
| 172 | echo "Usage:" |
| 173 | echo " - Handshake access SPI-NOR " |
| 174 | echo " $(basename "$0") cmd pid" |
| 175 | echo " <cmd>:" |
| 176 | echo " lock - lock the SPI-NOR resource" |
| 177 | echo " unlock - unlock the SPI-NOR resource" |
| 178 | echo " bind - bind the SPI-NOR resource" |
| 179 | echo " unbind - unbind the SPI-NOR resource" |
| 180 | echo " start_handshake - start handshake between BMC and Host" |
| 181 | echo " stop_handshake - release handshake between BMC and Host" |
| 182 | echo " <pid>: Optional - PID of the process call script" |
| 183 | exit 0 |
| 184 | fi |
| 185 | |
| 186 | CMD=$1 |
| 187 | |
| 188 | if [ ! -d "${spi_lock_dir}" ]; then |
| 189 | mkdir -p "${spi_lock_dir}" |
| 190 | fi |
| 191 | |
| 192 | if [ -z "$2" ]; then |
| 193 | PID=$$ |
| 194 | else |
| 195 | PID=$2 |
| 196 | fi |
| 197 | |
| 198 | if [[ "${CMD}" == "lock" ]]; then |
| 199 | lock_spi_resource "${PID}" |
| 200 | ret=$? |
| 201 | if [[ "${ret}" == "1" ]]; then |
| 202 | echo "Cannot lock SPI-NOR, the resource is busy" |
| 203 | exit 1 |
| 204 | fi |
| 205 | elif [[ "${CMD}" == "unlock" ]]; then |
| 206 | unlock_spi_resource "${PID}" |
| 207 | ret=$? |
| 208 | if [[ "${ret}" == "1" ]]; then |
| 209 | echo "Cannot unlock SPI-NOR, the resource is busy" |
| 210 | exit 1 |
| 211 | fi |
| 212 | elif [[ "${CMD}" == "bind" ]]; then |
| 213 | bind_aspeed_smc_driver "${PID}" |
| 214 | ret=$? |
| 215 | if [[ "${ret}" == "1" ]]; then |
| 216 | echo "Cannot bind SPI-NOR, the resource is busy" |
| 217 | exit 1 |
| 218 | fi |
| 219 | elif [[ "${CMD}" == "unbind" ]]; then |
| 220 | unbind_aspeed_smc_driver "${PID}" |
| 221 | ret=$? |
| 222 | if [[ "${ret}" == "1" ]]; then |
| 223 | echo "Cannot unbind SPI-NOR, the resource is busy" |
| 224 | exit 1 |
| 225 | fi |
| 226 | elif [[ "${CMD}" == "start_handshake" ]]; then |
| 227 | start_handshake_spi "${PID}" |
| 228 | ret=$? |
| 229 | if [[ "${ret}" == "1" ]]; then |
| 230 | echo "Cannot start handshake SPI-NOR" |
| 231 | exit 1 |
| 232 | fi |
| 233 | elif [[ "${CMD}" == "stop_handshake" ]]; then |
| 234 | stop_handshake_spi "${PID}" |
| 235 | ret=$? |
| 236 | if [[ "${ret}" == "1" ]]; then |
| 237 | echo "Cannot stop handshake SPI-NOR" |
| 238 | exit 1 |
| 239 | fi |
| 240 | fi |
| 241 | |
| 242 | exit 0 |