Fix Wi-Fi toggle on the Elipsa

It turns out that the kernel needs a little push now that the dedicated
wifi power control module is gone ;).

Issue was only exposed if you booted KOReader while the Wi-Fi was down.

frontend/device/kobo/ntx_io.lua

@@ -0,0 +1,18 @@
+-- Stupid wrapper so that we can send simple ntx_io ioctls from shell scripts...
+
+local ffi = require("ffi")
+local bor = bit.bor
+local C = ffi.C
+
+require("ffi/posix_h")
+
+assert(#arg == 2, "must pass an ioctl command & an ioctl argument")
+local ioc_cmd = tonumber(arg[1])
+local ioc_arg = tonumber(arg[2])
+
+local fd = C.open("/dev/ntx_io", bor(C.O_RDONLY, C.O_NONBLOCK, C.O_CLOEXEC))
+assert(fd ~= -1, "cannot open ntx_io character device")
+
+assert(C.ioctl(fd, ioc_cmd, ffi.cast("int", ioc_arg)) == 0, "ioctl failed")
+
+C.close(fd)

platform/kobo/disable-wifi.sh

@@ -58,3 +58,9 @@ if grep -q "sdio_wifi_pwr" "/proc/modules"; then
     usleep 250000
     rmmod sdio_wifi_pwr
 fi
+
+# Poke the kernel via ioctl on platforms without the dedicated power module...
+if [ ! -e "/drivers/${PLATFORM}/wifi/sdio_wifi_pwr.ko" ]; then
+    usleep 250000
+    ./luajit frontend/device/kobo/ntx_io.lua 208 0
+fi

platform/kobo/enable-wifi.sh

@@ -23,6 +23,10 @@ if ! grep -q "sdio_wifi_pwr" "/proc/modules"; then
         fi
 
         insmod "/drivers/${PLATFORM}/wifi/sdio_wifi_pwr.ko"
+    else
+        # Poke the kernel via ioctl on platforms without the dedicated power module...
+        # 208 is CM_WIFI_CTRL
+        ./luajit frontend/device/kobo/ntx_io.lua 208 1
     fi
 fi
 # Moar sleep!

platform/kobo/nickel.sh

@@ -13,7 +13,7 @@ export QT_GSTREAMER_PLAYBIN_AUDIOSINK=alsasink
 cd /
 unset OLDPWD
 unset LC_ALL TESSDATA_PREFIX STARDICT_DATA_DIR EXT_FONT_DIR
-unset KOREADER_DIR KO_DONT_GRAB_INPUT
+unset KO_DONT_GRAB_INPUT
 unset FBINK_FORCE_ROTA
 
 # Ensures fmon will restart. Note that we don't have to worry about reaping this, nickel kills on-animator.sh on start.
@@ -75,8 +75,15 @@ if grep -q "${WIFI_MODULE}" "/proc/modules"; then
         usleep 250000
         rmmod sdio_wifi_pwr
     fi
+
+    # Poke the kernel via ioctl on platforms without the dedicated power module...
+    if [ ! -e "/drivers/${PLATFORM}/wifi/sdio_wifi_pwr.ko" ]; then
+        usleep 250000
+        "${KOREADER_DIR}"/luajit "${KOREADER_DIR}"/frontend/device/kobo/ntx_io.lua 208 0
+    fi
 fi
 
+unset KOREADER_DIR
 unset CPUFREQ_DVFS CPUFREQ_CONSERVATIVE
 
 # Recreate Nickel's FIFO ourselves, like rcS does, because udev *will* write to it!