tinyusb: Make automatic start of USB optional

So far TinyUSB stack was starting during system init stage.
Now it is possible for the application to start it at later
time by manually call tinyusb_start() function.

Additionally shell commands are added to test functionality:
/usb start
/usb stop

Signed-off-by: Jerzy Kasenberg <[email protected]>

hw/usb/tinyusb/msc_fat_view/pkg.yml

@@ -33,7 +33,7 @@ pkg.deps:
     - "@apache-mynewt-core/sys/coredump"
     - "@mcuboot/boot/bootutil"
 
-pkg.init.!BOOT_LOADER:
+pkg.init.'(!BOOT_LOADER && TINYUSB_AUTO_START!=0)':
     msc_fat_view_pkg_init: $before:tinyusb_start
 
 pkg.init.'!BOOT_LOADER && MSC_FAT_VIEW_COREDUMP_FILES':

hw/usb/tinyusb/pkg.yml

@@ -33,9 +33,11 @@ pkg.deps:
     - "@apache-mynewt-core/kernel/os"
     - "@apache-mynewt-core/hw/usb/tinyusb/tinyusb_sdk"
 
-pkg.init.OS_SCHEDULING:
+pkg.init.'(OS_SCHEDULING!=0 && TINYUSB_AUTO_START!=0)':
     tinyusb_start: 'MYNEWT_VAL(USBD_SYSINIT_STAGE)'
 
+pkg.deps.TINYUSB_SHELL:
+    - "@apache-mynewt-core/hw/usb/tinyusb/shell"
 pkg.deps.USBD_STD_DESCRIPTORS:
     - "@apache-mynewt-core/hw/usb/tinyusb/std_descriptors"
 pkg.deps.'MCU_TARGET == "nRF52840"':

hw/usb/tinyusb/shell/pkg.yml

@@ -0,0 +1,33 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+#
+
+pkg.name: hw/usb/tinyusb/shell
+pkg.description: Shell for TinyUSB
+pkg.author: "Apache Mynewt <[email protected]>"
+pkg.homepage: "http://mynewt.apache.org/"
+pkg.keywords:
+    - usb
+    - tinyusb
+
+pkg.deps:
+    - "@apache-mynewt-core/kernel/os"
+    - "@apache-mynewt-core/hw/usb/tinyusb"
+
+pkg.init:
+    tinyusb_cli_init: 'MYNEWT_VAL(SHELL_SYSINIT_STAGE) + 1'

hw/usb/tinyusb/shell/src/tinyusb_cli.c

@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ */
+
+#include <os/mynewt.h>
+#include <shell/shell.h>
+#include <tinyusb/tinyusb.h>
+#include <device/usbd.h>
+#include <tusb.h>
+
+static int
+usb_cli_start_cmd(const struct shell_cmd *cmd, int argc, char **argv,
+                  struct streamer *streamer)
+{
+    if (!tusb_inited()) {
+        tinyusb_start();
+    } else if (!tud_connected()) {
+        tud_connect();
+    }
+
+    return 0;
+}
+
+static int
+usb_cli_stop_cmd(const struct shell_cmd *cmd, int argc, char **argv,
+                  struct streamer *streamer)
+{
+    if (tud_connected()) {
+        tud_disconnect();
+    }
+
+    return 0;
+}
+
+static const struct shell_cmd usb_cli_commands[] = {
+    SHELL_CMD_EXT("start", usb_cli_start_cmd, NULL),
+    SHELL_CMD_EXT("stop", usb_cli_stop_cmd, NULL),
+    { },
+};
+
+int
+tinyusb_cli_init(void)
+{
+    shell_register("usb", usb_cli_commands);
+
+    return 0;
+}

hw/usb/tinyusb/syscfg.yml

@@ -21,6 +21,16 @@ syscfg.defs:
     TINYUSB:
         description: Constant value
         value: 1
+    TINYUSB_AUTO_START:
+        description: >
+            Start USB stack during sysinit stage USBD_SYSINIT_STAGE.
+            If not set tinyusb_start() can be called manually by application code
+            later.
+        value: 1
+    TINYUSB_SHELL:
+        description: >
+            Enable shell for TinyUSB
+        value: 0
 
     USBD_TASK_PRIORITY:
         description: >