#!/bin/sh
# Copyright (C) Sierra Wireless Inc. Use of this work is subject to license.
#
# TI wireless wl18xx specific applications start or stop here
# TI WIFI IoT board is managed by SDIO/MMC bus. Some signals need to be set
# and managed before the SDIO/MMC module is inserted.
# TI WIFI IoT conflicts with others devices using the SDIO/MMC bus

export PATH=$PATH:/usr/bin:/bin:/usr/sbin:/sbin

ti_wifi_start() {
    # Add mdev rule for crda
    grep crda /etc/mdev.conf > /dev/null
    if [ $? -ne 0 ]; then
       echo "\$COUNTRY=.. root:root 0660 */sbin/crda" >> /etc/mdev.conf
    fi
    lsmod | grep wlcore >/dev/null
    if [ $? -ne 0 ]; then
       # Check if MMC/SDIO module is inserted. Because WIFI use SDIO/MMC bus
       # we need to remove the SDIO/MMC module
       lsmod | grep msm_sdcc >/dev/null
       if [ $? -eq 0 ]; then
          grep -q mmcblk /proc/mounts
          if [ $? -ne 0 ]; then
             rmmod msm_sdcc
          else
             false
          fi
          if [ $? -ne 0 ]; then
             # Unable to remove. May be others devices use SDIO/MMC bus
             echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
             echo "Unable to remove the SDIO/MMC module... May be in use ?"
             echo "Please, free all SDIO/MMC devices before using TI WIFI."
             echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
             exit 127
          fi
       fi

       # SDIO mux select IOT card by writing 0 to gpio expander offset 9
       # Enable GPIO expander port of i2c switch
       i2cset -y 0 0x71 0x04
       # Reset the GPIO expander
       i2cset -y 0 0x3e 0x7d 0x12
       i2cset -y 0 0x3e 0x7d 0x34
       # Set output to low for offset 9
       i2cset -y -m 0x02 0 0x3e 0x10 0x00
       # Set direction to output by performing masked write of 0 to bit 1 of RegDirB
       i2cset -y -m 0x02 0 0x3e 0x0e 0x00

       # Set IOT0_GPIO2 = 1 (WP GPIO13)                                             
       [ -d /sys/class/gpio/gpio13 ] || echo 13 > /sys/class/gpio/export            
       echo out > /sys/class/gpio/gpio13/direction                                  
       echo 1 > /sys/class/gpio/gpio13/value                                        
                                                                                    
       # Set IOTO_RESET = 1 (WP GPIO2)                                              
       [ -d /sys/class/gpio/gpio2 ] || echo 2 > /sys/class/gpio/export              
       echo out > /sys/class/gpio/gpio2/direction                                   
       echo 1 > /sys/class/gpio/gpio2/value                                         
                                                                                    
       # Set IOT0_GPIO4 = 1 (WP GPIO8)                                              
       [ -d /sys/class/gpio/gpio8 ] || echo 8 >/sys/class/gpio/export               
       echo out >/sys/class/gpio/gpio8/direction                                    
       echo 1 >/sys/class/gpio/gpio8/value                                          
                                                                                    
       modprobe msm_sdcc || exit 127                                                
                                                                                    
       modprobe wlcore || exit 127                                                  
       modprobe wlcore_sdio || exit 127                                             
       modprobe wl18xx || exit 127                                                  
    fi                                                                              
    sleep 5                                                                         
    ifconfig -a | grep wlan0 >/dev/null                                             
    if [ $? -ne 0 ] ; then                                                          
        echo "Failed to start TI wifi"; exit 127                                    
    fi                                                                              
    ifconfig wlan0 up >/dev/null                                                    
    if [ $? -ne 0 ] ; then                                                          
        echo "Failed to start TI wifi"; exit 127                                    
    fi                                                                              
}

ti_wifi_stop() {                                                                    
    ifconfig | grep wlan0 >/dev/null                                                
    if [ $? -eq 0 ]; then                                                           
       ifconfig wlan0 down                                                          
    fi                                                                              
    lsmod | grep wlcore >/dev/null                                                  
    if [ $? -eq 0 ]; then                                                           
       rmmod wl18xx || exit 127                                                     
       rmmod wlcore_sdio || exit 127                                                
       rmmod wlcore || exit 127                                                     
       rmmod mac80211 || exit 127                                                   
       rmmod cfg80211 || exit 127                                                   
       rmmod compat || exit 127                                                     
                                                                                    
       rmmod msm-sdcc || exit 127                                                   
                                                                                    
       # Reset IOT0_GPIO4 = 0 (WP GPIO8)                                            
       echo 0 > /sys/class/gpio/gpio8/value                                         
       # Clear IOTO_RESET                                                           
       echo 0 > /sys/class/gpio/gpio2/value                                         
       # Set the SDIO mux to the SD Card slot                                       
       i2cset -y -m 0x02 0 0x3e 0x10 0x02                                           
       # Reset IOT0_GPIO2 = 0 (WP GPIO13)                                           
       echo 0 > /sys/class/gpio/gpio13/value                                        
                                                                                    
       # Insert MMC/SDIO module                                                     
       modprobe msm_sdcc || exit 127                                                
    fi                                                                              
}

case "$1" in                                                                        
    start)                                                                          
        ti_wifi_start                                                               
        ;;                                                                          
    stop)                                                                           
        ti_wifi_stop                                                                
        ;;                                                                          
    restart)                                                                        
        ti_wifi_stop                                                                
        ti_wifi_start                                                               
        ;;                                                                          
    *)                                                                              
        exit 1                                                          
        ;;                                                              
esac                                                                    
                                                                        
exit 0