From 1a5ab3c3cddbbcf4654ced2e35c66a78d40db944 Mon Sep 17 00:00:00 2001
From: Pradeep Panigrahi <pradeepp@codeaurora.org>
Date: Tue, 2 Jul 2013 03:03:41 +0530
Subject: [PATCH] init: qcom: Add hsic control service for bluetooth.

The bt_hsic_control service is used for bluetooth to
control the HSIC bus state for power management.

CRs-fixed: 495435

Change-Id: Iebb32d63ae0eb297cb57c415b7a5fc50bf2d96f5
---
 common.mk                      |  1 +
 rootdir/Android.mk             |  7 +++
 rootdir/etc/hsic.control.bt.sh | 79 ++++++++++++++++++++++++++++++++++
 3 files changed, 87 insertions(+)
 create mode 100644 rootdir/etc/hsic.control.bt.sh

diff --git a/common.mk b/common.mk
index 5423a1f4..93653ee0 100644
--- a/common.mk
+++ b/common.mk
@@ -170,6 +170,7 @@ INIT += init.qcom.thermal_conf.sh
 INIT += init.qcom.sensor.sh
 INIT += init.target.rc
 INIT += init.qcom.bt.sh
+INIT += hsic.control.bt.sh
 INIT += init.qcom.coex.sh
 INIT += init.qcom.fm.sh
 INIT += init.qcom.early_boot.sh
diff --git a/rootdir/Android.mk b/rootdir/Android.mk
index 41d3ad0f..b37c2cfc 100644
--- a/rootdir/Android.mk
+++ b/rootdir/Android.mk
@@ -25,6 +25,13 @@ LOCAL_MODULE_CLASS := ETC
 LOCAL_SRC_FILES    := etc/init.qcom.bt.sh
 include $(BUILD_PREBUILT)
 
+include $(CLEAR_VARS)
+LOCAL_MODULE       := hsic.control.bt.sh
+LOCAL_MODULE_TAGS  := optional eng
+LOCAL_MODULE_CLASS := ETC
+LOCAL_SRC_FILES    := etc/hsic.control.bt.sh
+include $(BUILD_PREBUILT)
+
 include $(CLEAR_VARS)
 LOCAL_MODULE       := init.ath3k.bt.sh
 LOCAL_MODULE_TAGS  := optional eng
diff --git a/rootdir/etc/hsic.control.bt.sh b/rootdir/etc/hsic.control.bt.sh
new file mode 100644
index 00000000..5a26e3e7
--- /dev/null
+++ b/rootdir/etc/hsic.control.bt.sh
@@ -0,0 +1,79 @@
+#!/system/bin/sh
+# Copyright (c) 2012, The Linux Foundation. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above copyright
+#       notice, this list of conditions and the following disclaimer in the
+#       documentation and/or other materials provided with the distribution.
+#     * Neither the name of The Linux Foundation nor
+#       the names of its contributors may be used to endorse or promote
+#       products derived from this software without specific prior written
+#       permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+action=`getprop bluetooth.hsic_ctrl`
+last_action=`getprop hsic_ctrl.last`
+wifi_status=`getprop wlan.driver.status`
+wifi_action=`getprop wlan.hsic_ctrl`
+wifi_type=`getprop wlan.driver.ath`
+
+# check action from bt
+if [ $wifi_type == "2" ]; then
+    if [ $action == "load_wlan" ]; then
+        if [ $wifi_status == "ok" ] ||
+           [ $wifi_action == "wlan_loading" ] ||
+           [ $last_action == "load_wlan" ]; then
+           echo "Not doing anything as wlan is on or turning on"
+           # do nothing
+        else
+            setprop wlan.hsic_ctrl "service_loading"
+
+            # bind HSIC HCD
+            echo msm_hsic_host > /sys/bus/platform/drivers/msm_hsic_host/bind
+
+            # load WLAN driver
+            insmod /system/lib/modules/wlan.ko
+
+            # inform WLAN driver bt is on
+            echo 1 > /sys/module/wlan/parameters/ath6kl_bt_on
+
+            # unload WLAN driver
+            rmmod wlan
+            echo "Now hsic power control will be in auto mode"
+        fi
+    elif [ $action == "unbind_hsic" ]; then
+        if [ "$wifi_action" == "wlan_unloading" ] ||
+           [ "$last_action" == "unbind_hsic" ]; then
+            echo "Not doing anything as wlan is also unloading"
+            # do nothing
+        else
+            # unbind HSIC HCD
+            echo msm_hsic_host > /sys/bus/platform/drivers/msm_hsic_host/unbind
+            echo "Unbinding HSIC before BT turns off"
+        fi
+    fi
+fi # [ $wifi_type == "2" ]
+
+# set property to done
+# setprop bluetooth.hsic_ctrl "done"
+
+# set property to NULL
+setprop wlan.hsic_ctrl ""
+
+setprop hsic_ctrl.last $action
+