package/kernel/mmc_over_gpio/files/mmc_over_gpio.init

   1 #!/bin/sh /etc/rc.common
   2 # Copyright (C) 2008 OpenWrt.org
   3 START=90
   4
   5 CONFIGFS_DIR="/config/gpiommc"
   6
   7 # add_device(name, DI_pin, DO_pin, CLK_pin, CS_pin, mode)
   8 add_device() {
   9         local dir="$CONFIGFS_DIR/$1"
  10
  11         mkdir -p $dir
  12         [ $? -eq 0 ] || return 1
  13         echo $2 > $dir/gpio_data_in
  14         [ $? -eq 0 ] || return 1
  15         echo $3 > $dir/gpio_data_out
  16         [ $? -eq 0 ] || return 1
  17         echo $4 > $dir/gpio_clock
  18         [ $? -eq 0 ] || return 1
  19         echo $5 > $dir/gpio_chipselect
  20         [ $? -eq 0 ] || return 1
  21         echo $6 > $dir/spi_mode
  22         [ $? -eq 0 ] || return 1
  23         # XXX We have more config options available. Use defaults for now.
  24
  25         echo 1 > $dir/register
  26         [ $? -eq 0 ] || return 1
  27
  28         return 0
  29 }
  30
  31 # remove_device(name)
  32 remove_device() {
  33         local dir="$CONFIGFS_DIR/$1"
  34
  35         rmdir $dir
  36 }
  37
  38 mount_configfs() {
  39         # FIXME: This should probably be done somewhere else.
  40         mount | grep configfs
  41         if [ $? -eq 0 ]; then
  42                 # already mounted
  43                 return 0
  44         fi
  45         mkdir -p /config
  46         [ $? -eq 0 ] || return 1
  47         mount configfs -t configfs /config
  48         [ $? -eq 0 ] || return 1
  49
  50         return 0
  51 }
  52
  53 start_service() {
  54         local section="$1"
  55         config_get "name" "$section" "name"
  56         config_get "DI_pin" "$section" "DI_pin"
  57         config_get "DO_pin" "$section" "DO_pin"
  58         config_get "CLK_pin" "$section" "CLK_pin"
  59         config_get "CS_pin" "$section" "CS_pin"
  60         config_get "mode" "$section" "mode"
  61         config_get_bool "enabled" "$section" "enabled" '1'
  62         [ "$enabled" -gt 0 ] && add_device "$name" $DI_pin $DO_pin $CLK_pin $CS_pin $mode &
  63 }
  64
  65 stop_service() {
  66         local section="$1"
  67         config_get "name" "$section" "name"
  68         remove_device "$name"
  69 }
  70
  71 start() {
  72         # Make sure configfs is mounted
  73         mount_configfs
  74         [ $? -eq 0 ] || return 1
  75
  76         config_load "mmc_over_gpio"
  77         config_foreach start_service "mmc_over_gpio"
  78 }
  79
  80 stop() {
  81         config_load "mmc_over_gpio"
  82         config_foreach stop_service "mmc_over_gpio"
  83 }