From d9414ffb28843feecc4470b315224cd017dee1c8 Mon Sep 17 00:00:00 2001
From: Pawit Pornkitprasan <p.pawit@gmail.com>
Date: Sun, 24 Jul 2011 14:51:54 +0200
Subject: [PATCH] Enable proper bluetooth MAC address on c1 devices

The approach here is to used bdaddr_read.c to read the
MAC address (it's in a different format than ro.bt.bdaddr_path
accepts) at /efs/imei/bt.txt and write it to /data/bdaddr and
set ro.bt.bdaddr_path there. This approach was used with
device/lge/thunderg and bdaddr_read.c was adapted from there.
---
 bdaddr_read/Android.mk    | 28 ++++++++++++++++++++
 bdaddr_read/bdaddr_read.c | 54 +++++++++++++++++++++++++++++++++++++++
 common.mk                 |  3 ++-
 init.rc                   |  9 +++++++
 4 files changed, 93 insertions(+), 1 deletion(-)
 create mode 100644 bdaddr_read/Android.mk
 create mode 100644 bdaddr_read/bdaddr_read.c

diff --git a/bdaddr_read/Android.mk b/bdaddr_read/Android.mk
new file mode 100644
index 0000000..46f95cd
--- /dev/null
+++ b/bdaddr_read/Android.mk
@@ -0,0 +1,28 @@
+# Copyright (C) 2010 Ricardo Cerqueira
+# Copyright (C) 2011 Pawit Pornkitprasan
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_SRC_FILES := bdaddr_read.c
+
+LOCAL_SHARED_LIBRARIES := libcutils
+
+LOCAL_MODULE := bdaddr_read
+
+include $(BUILD_EXECUTABLE)
+
diff --git a/bdaddr_read/bdaddr_read.c b/bdaddr_read/bdaddr_read.c
new file mode 100644
index 0000000..c6e08c9
--- /dev/null
+++ b/bdaddr_read/bdaddr_read.c
@@ -0,0 +1,54 @@
+#include <fcntl.h>
+#include <string.h>
+#include <cutils/properties.h>
+#include <cutils/log.h>
+
+#define LOG_TAG "bdaddr"
+#define SAMSUNG_BDADDR_PATH "/efs/imei/bt.txt"
+#define BDADDR_PATH "/data/bdaddr"
+
+/* Read bluetooth MAC from SAMSUNG_BDADDR_PATH (different format),
+ * write it to BDADDR_PATH, and set ro.bt.bdaddr_path to BDADDR_PATH
+ *
+ * Adapted from bdaddr_read.c of thunderg
+ */
+
+int main() {
+    char tmpbdaddr[23]; // bt_macaddr:xxxxxxxxxxxx
+    char bdaddr[18];
+    int count;
+    int fd;
+
+    fd = open(SAMSUNG_BDADDR_PATH, O_RDONLY);
+    if(fd < 0) {
+        fprintf(stderr, "open(%s) failed\n", SAMSUNG_BDADDR_PATH);
+        LOGE("Can't open %s\n", SAMSUNG_BDADDR_PATH);
+        return -1;
+    }
+
+    count = read(fd, tmpbdaddr, sizeof(tmpbdaddr));
+    if (count < 0) {
+        fprintf(stderr, "read(%s) failed\n", SAMSUNG_BDADDR_PATH);
+        LOGE("Can't read %s\n", SAMSUNG_BDADDR_PATH);
+        return -1;
+    }
+    else if (count != sizeof(tmpbdaddr)) {
+        fprintf(stderr, "read(%s) unexpected size %d\n", SAMSUNG_BDADDR_PATH, count);
+        LOGE("Error reading %s (unexpected size %d)\n", SAMSUNG_BDADDR_PATH, count);
+        return -1;
+    }
+
+    count = sprintf(bdaddr, "%2.2s:%2.2s:%2.2s:%2.2s:%2.2s:%2.2s\0",
+            tmpbdaddr+11,tmpbdaddr+13,tmpbdaddr+15,tmpbdaddr+17,tmpbdaddr+19,tmpbdaddr+21);
+
+    fd = open(BDADDR_PATH, O_WRONLY|O_CREAT|O_TRUNC, 00600|00060|00006);
+    if (fd < 0) {
+        fprintf(stderr, "open(%s) failed\n", BDADDR_PATH);
+        LOGE("Can't open %s\n", BDADDR_PATH);
+        return -2;
+    }
+    write(fd, bdaddr, 18);
+    close(fd);
+    property_set("ro.bt.bdaddr_path", BDADDR_PATH);
+    return 0;
+}
diff --git a/common.mk b/common.mk
index 323ceed..6a2f2c1 100644
--- a/common.mk
+++ b/common.mk
@@ -49,7 +49,8 @@ PRODUCT_PACKAGES := \
 	libstagefrighthw \
 	libexifa \
 	libjpega \
-	com.android.future.usb.accessory
+	com.android.future.usb.accessory \
+        bdaddr_read
 
 # These are the hardware-specific configuration files
 PRODUCT_COPY_FILES := \
diff --git a/init.rc b/init.rc
index 601d90b..536be8e 100644
--- a/init.rc
+++ b/init.rc
@@ -681,6 +681,15 @@ service bluetoothd /system/bin/bluetoothd -n
     group bluetooth net_bt_admin misc
     disabled
 
+# bluetooth mac address
+service bdaddr /system/bin/bdaddr_read
+    user root
+    disabled
+    oneshot
+
+on property:init.svc.bootanim=running
+    start bdaddr
+
 service installd /system/bin/installd
     socket installd stream 600 system system