# Kernel-visible signals

# ATOMICPI_* constants: Global GPIO index
# ATOMICPICHIP_* constants: Chip ID " " Index in chip
# Think gpioget $ATOMICPICHIP_ISH_GPIO_0 (without quotes)

# External GPIO
ATOMICPI_ISH_GPIO_0=335
ATOMICPICHIP_ISH_GPIO_0="gpiochip3 21"
ATOMICPI_ISH_GPIO_1=332
ATOMICPICHIP_ISH_GPIO_1="gpiochip3 18"
ATOMICPI_ISH_GPIO_2=338
ATOMICPICHIP_ISH_GPIO_2="gpiochip3 24"
ATOMICPI_ISH_GPIO_3=329
ATOMICPICHIP_ISH_GPIO_3="gpiochip3 15"
ATOMICPI_ISH_GPIO_4=336
ATOMICPICHIP_ISH_GPIO_4="gpiochip3 22"
ATOMICPI_ISH_GPIO_7=330
ATOMICPICHIP_ISH_GPIO_7="gpiochip3 16"

# Volume up pin
ATOMICPI_GPIO_DFX_2=348
ATOMICPICHIP_GPIO_DFX_2="gpiochip1 7"
# Volume down pin
ATOMICPI_GPIO_DFX_4=346
ATOMICPICHIP_GPIO_DFX_4="gpiochip1 5"

# Internal signals
ATOMICPI_I2C2_3P3_SDA=476
ATOMICPICHIP_I2C2_3P3_SDA="gpiochip0 62"
ATOMICPI_I2C2_3P3_SCL=480
ATOMICPICHIP_I2C2_3P3_SCL="gpiochip0 66"
ATOMICPI_AU_MIC_SEL=341
ATOMICPICHIP_AU_MIC_SEL="gpiochip1 0"
ATOMICPI_XMOS_RESET=349
ATOMICPICHIP_XMOS_RESET="gpiochip1 8"
ATOMICPI_BN_INT=358
ATOMICPICHIP_BN_INT="gpiochip1 17"
ATOMICPI_BN_RESET=366
ATOMICPICHIP_BN_RESET="gpiochip1 25"

# Physical connector descriptions
# 26-pin connector interface
ATOMICPICONN_ISH_GPIO_0=24
ATOMICPICONN_ISH_GPIO_1=25
ATOMICPICONN_ISH_GPIO_2=26
ATOMICPICONN_ISH_GPIO_3=18
ATOMICPICONN_ISH_GPIO_4=19
ATOMICPICONN_ISH_GPIO_7=20
# Enchilada breakout board
ATOMICPIENCHCONN_ISH_GPIO_0=9
ATOMICPIENCHCONN_ISH_GPIO_1=10
ATOMICPIENCHCONN_ISH_GPIO_2=11
ATOMICPIENCHCONN_ISH_GPIO_3=3
ATOMICPIENCHCONN_ISH_GPIO_4=4
ATOMICPIENCHCONN_ISH_GPIO_7=5
# LEDs
ATOMICPIENCHLED_GREEN="ISH_GPIO_1"
ATOMICPIENCHLED_YELLOW="ISH_GPIO_2"

# Test if actually running on compatible hardware

ATOMICPI_GPIO_HARDWARE_CHIPS="228 314 341 414"
ATOMICPI_GPIO_HARDWARE_NGPIO_228=86
ATOMICPI_GPIO_HARDWARE_NGPIO_314=27
ATOMICPI_GPIO_HARDWARE_NGPIO_341=73
ATOMICPI_GPIO_HARDWARE_NGPIO_414=98

atomicpi_gpio_hardware() {
    for CHIP in $ATOMICPI_GPIO_HARDWARE_CHIPS; do
        eval NGPIO_EXPECTED='$ATOMICPI_GPIO_HARDWARE_NGPIO_'$CHIP
        NGPIO_ACTUAL=`cat "/sys/class/gpio/gpiochip$CHIP/ngpio" || true`
        if [ "$NGPIO_EXPECTED" != "$NGPIO_ACTUAL" ]; then
            return 1
        fi
    done
    return 0
}