package/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 $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() {
  54         # Make sure configfs is mounted
  55         mount_configfs
  56         [ $? -eq 0 ] || return 1
  57
  58         #FIXME we should use a config file, but I dunno how that parser works.
  59         add_device "default" 5 4 3 7 0
  60 }
  61
  62 stop() {
  63         remove_device "default"
  64 }