[Gta04-owner] Linux 3.2-rc4 - now with wifi

[NeilBrown]

hi all,

 I've updated my mainline gta04 kernel tree to 3.2-rc4.
    git://neil.brown.name/gta04 merge


The main new functionality is wireless.  The details for enabling wireless
are slightly different than with the hw-validation kernel.

1/ the reset line is /sys/class/gpio/gta04:wlan:reset
    write 0 to reset, 1 to release the reset
   The "reset" line is active-low.

2/ After power-on and reset you need to trigger a card-detect signal.
   This requires making gpio/gta:wlan/cd go high, then low.  Card-detect
   is active-low too.

so:

VDD=3150000
# VDD=2800000
echo 1 > /sys/class/gpio/gta04:wlan:cd/value
echo "0" >/sys/class/gpio/gta04:wlan:reset/value # activate reset
echo "$VDD" >/sys/devices/platform/reg-virt-consumer.4/max_microvolts
echo "$VDD" >/sys/devices/platform/reg-virt-consumer.4/min_microvolts
echo "normal" >/sys/devices/platform/reg-virt-consumer.4/mode
echo "1" >/sys/class/gpio/gta04:wlan:reset/value # release reset
echo 0 > /sys/class/gpio/gta04:wlan:cd/value  # edge triggers interrupt.

Each gpio directory has an 'active_low' setting.  I should probably find a
way to enable that...  Unless I end up hiding all of this inside an rfkill.


I added the code to enable power-off, but it doesn't work.
As soon as it tries to access the i2c device to send the power-down command to
the twl4030 it triggers an error.  It seems that something earlier in the
shutdown sequence disabled something that is needed for writing to I2C, but I
have no idea what.
I've sent an email to someone to ask for hints..

I discovered that USB_OTG is disabled in the default config, because
USB_SUSPEND is disabled.  If I enable this (because they sound like good
things) the charging doesn't work any more.
I think the usb port goes to sleep and so stops charging.  I really need to
find a way for the charger to keep the usb port awake.

Still to do:
 - power off
 - accelerometers
 - explore various bugs reported in dmesg:
 - Find out why 'suspend' doesn't suspend
 - Make sure suspend saves maximum power.
 - make sure can wake from suspend by:
    power button, rtc, accelerometer, GSM
 - tidy up LCD panel driver.
 - make charger keep usb awake, and enable USB_OTG
 - see if I can make an 'rfkill' device that will power-on wifi/BT for me.
 - Maybe an rfkill for 'gps' as well.
 - further explore the rtc alarm bug I found last week.
 - gyroscope, compass, barometer,  FM radio?
 - See if I can get it to charge from Openmoko charger.
 - get all the fixes upstream.

My goal is to be using this as my regular phone by LCA-2012 !!

NeilBrown
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