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bluez: power cycle BT module if hciattach fails 

Power cycle the Bluetooth module in the AR6233 if the Bluetooth driver,
hciattach, is unable to communicate with the Bluetooth module.

This change depends on a related change in the kernel GPIO configuration
code that makes the GPIO available to user space.

Signed-off-by: Javier Viguera <javier.viguera@digi.com>
This commit is contained in:
Javier Viguera 2013-02-27 16:11:20 +01:00
parent cab3e32599
commit fd30b58284
1 changed files with 16 additions and 23 deletions
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39
meta-digi-del/recipes-connectivity/btfilter/files/bluez-init
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@ -23,7 +23,7 @@ fi
SCRIPTNAME="${0}"
ccardwmx28js_bt_init() {
ccardimx28js_bt_init() {
#
# Exit if this hardware does not support Bluetooth
#
@ -56,29 +56,22 @@ ccardwmx28js_bt_init() {
#
# Start the Bluetooth driver and daemon (D-BUS must already be running)
#
BT_DEVICE="/dev/ttyBt"
BT_DRIVER="ath3k"
BT_BAUD_RATE="4000000"
HCIATTACH_OPTIONS="${BT_DEVICE} ${BT_DRIVER} ${BT_BAUD_RATE}"
HCIATTACH_OPTIONS_115K="${BT_DEVICE} ${BT_DRIVER} 115200"
TRIES="1"
MAX_TRIES="11111"
while ! hciattach ${HCIATTACH_OPTIONS} 1>/dev/null && [ "${TRIES}" != "${MAX_TRIES}" ]; do
echo "${SCRIPTNAME}: (hciattach), retrying..."
HCIATTACH_ARGS="ttyBt ath3k 4000000"
RETRIES="5"
while [ "${RETRIES}" -gt "0" ]; do
hciattach ${HCIATTACH_ARGS} 1>/dev/null && break
#
# If hciattach at 4Mbps doesn't work, then try it at 115Kbps
# just to get the chip working.
# If hciattach fails try to recover it by toggling the GPIO
#
if hciattach ${HCIATTACH_OPTIONS_115K} 1>/dev/null; then
#
# It worked at 115Kbps. The chip should be recovered now.
# Kill the daemon so we can retry at 4Mbps.
#
kill -9 $(pidof hciattach)
fi
TRIES="${TRIES}1"
BT_PWR_L="/sys/class/gpio/gpio21"
[ -d "${BT_PWR_L}" ] || echo -n 21 > /sys/class/gpio/export
echo -n out > ${BT_PWR_L}/direction && sleep .2
echo -n 0 > ${BT_PWR_L}/value && sleep .2
echo -n 1 > ${BT_PWR_L}/value && sleep .2
[ -d "${BT_PWR_L}" ] && echo -n 21 > /sys/class/gpio/unexport
RETRIES="$((RETRIES - 1))"
done
if [ "${TRIES}" = "${MAX_TRIES}" ]; then
if [ "${RETRIES}" -eq "0" ]; then
echo "${SCRIPTNAME}: FAILED (hciattach)"
exit
fi
@ -91,8 +84,8 @@ ccardwmx28js_bt_init() {
echo "Starting bluetooth services."
# Initialize driver for 'ccardwmx28js'
[ "$(cat /sys/kernel/machine/name)" = "ccardimx28" ] && ccardwmx28js_bt_init
# Initialize driver for 'ccardimx28js'
[ "$(cat /sys/kernel/machine/name)" = "ccardimx28" ] && ccardimx28js_bt_init
# Run bluetooth daemon
if hciconfig hci0 up && bluetoothd; then