Bluetooth: Add Bluetooth init sample

This patch adds a very simple application for demonstrating the use of
the bt_init() API. Right now this is just tested to work with qemu and
the HCI UART driver with the help of the btproxy tool on the host OS
side. More information is available in the samples/bluetooth/README
file.

Change-Id: I03f92d158e9e5d57275241502bb8fa94350fc335
Co-authored-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

samples/bluetooth/README

@@ -0,0 +1,29 @@
+Bluetooth subsystem
+
+= Architecture =
+
+All processing is done in fibers. Basic structure for packet processing
+is bt_buf. Packets are queued to different queues and processed. Packet
+allocation is done through a free packets queue which gets populated
+during the stack init.
+
+= Building =
+
+$ make -C host/src
+$ make -C samples/bluetooth/<app>
+
+= Testing =
+
+Host Bluetooth controler is connected to the second qemu serial line
+through a UNIX socket (qemu option -serial unix:/tmp/bt-server-bredr).
+
+On the host side BlueZ allows to "connect" Bluetooth controller through
+a so-called user channel. Use the btproxy tool for that:
+
+$ sudo tools/btproxy -u
+Listening on /tmp/bt-server-bredr
+
+Now qemu can connect serial line to the 'bt-server-bredr' UNIX socket
+with following command:
+
+$ make -C samples/bluetooth/<app> NODE1.qemu

samples/bluetooth/init/Makefile

@@ -0,0 +1,51 @@
+# Makefile - Bluetooth init sample makefile
+
+#
+# Copyright (c) 2015 Intel Corporation
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# 1) Redistributions of source code must retain the above copyright notice,
+# this list of conditions and the following disclaimer.
+#
+# 2) 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.
+#
+# 3) Neither the name of Intel Corporation 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 AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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.
+#
+
+# DESCRIPTION
+# Makefile for the Bluetooth init sample
+
+include $(subst \,/,${VXMICRO_BASE})/make/env/defs.base
+
+# default BSP
+BSP ?= generic_pc
+
+PRJ_CONF = prj_${vARCH}.conf
+VPFILE = prj.vpf
+
+PRJ_INCPATH += ${vBSP_BASE_DIR}/${BSP}
+PRJ_INCPATH += ${vBASE}/drivers
+PRJ_INCPATH += ${vBASE}/arch/${vARCH}
+
+# UART for Bluetooth
+QEMU_EXTRA_FLAGS += -serial unix:/tmp/bt-server-bredr
+
+include ${vMAKE}/target/make.ukernel

samples/bluetooth/init/prj.vpf

@@ -0,0 +1,5 @@
+% Application       : Bluetooth init
+
+% TASK NAME         PRIO ENTRY           STACK GROUPS
+% ===================================================
+  TASK MAIN            7 mainloop        2048 [EXE]

samples/bluetooth/init/prj_x86.conf

@@ -0,0 +1,4 @@
+CONFIG_TEST_RANDOM_GENERATOR=y
+CONFIG_BLUETOOTH=y
+CONFIG_BLUETOOTH_UART=y
+CONFIG_UART_INTERRUPT_DRIVEN=y

samples/bluetooth/init/src/main.c

@@ -0,0 +1,50 @@
+/* main.c - Application main entry point */
+
+/*
+ * Copyright (c) 2015 Intel Corporation
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1) Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2) 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.
+ *
+ * 3) Neither the name of Intel Corporation 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 AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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.
+ */
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+#include <bluetooth/bluetooth.h>
+
+void mainloop(void)
+{
+	int err;
+
+	err = bt_init();
+	if (err) {
+		printk("Bluetooth init failed (err %d)\n", err);
+		return;
+	}
+
+	printk("Bluetooth initialized\n");
+}