Update nimble core to esp-nimble @a4cd602

Author: h2zero

src/nimble/LICENSE

@@ -215,3 +215,13 @@ under the following license:
 This product bundles tinycrypt, which is available under the "3-clause BSD"
 license. For details, and bundled files see:
     * ext/tinycrypt/LICENSE
+
+This product bundles and partly derives from parts of the Nordic nRF52 SDK,
+which are available under a BSD style license.  Relevant files are:
+    * babblesim/hw/mcu/nordic/nrf52_bsim/src/system_nrf52.c
+
+This product bundles additional files from CMSIS-CORE, but these files are
+missing licensing information.  The BSD license was subsequently added to
+these files in later releases.  These files are:
+    * babblesim/hw/mcu/nordic/nrf52_bsim/include/mcu/cmsis_nvic.h
+

src/nimble/README.md

@@ -25,7 +25,21 @@
 
 ## Overview
 
-Apache NimBLE is an open-source Bluetooth 5.1 stack (both Host & Controller)
+<a href="https://github.com/apache/mynewt-nimble/actions/workflows/build_targets.yml">
+  <img src="https://github.com/apache/mynewt-nimble/actions/workflows/build_targets.yml/badge.svg">
+<a/>
+
+<a href="https://github.com/apache/mynewt-nimble/actions/workflows/build_ports.yml">
+  <img src="https://github.com/apache/mynewt-nimble/actions/workflows/build_ports.yml/badge.svg">
+<a/>
+
+<a href="https://github.com/apache/mynewt-nimble/actions/workflows/newt_test_all.yml/badge.svg">
+  <img src="https://github.com/apache/mynewt-nimble/actions/workflows/newt_test_all.yml/badge.svg">
+<a/>
+
+<p>
+
+Apache NimBLE is an open-source Bluetooth 5.4 stack (both Host & Controller)
 that completely replaces the proprietary SoftDevice on Nordic chipsets. It is
 part of [Apache Mynewt project](https://github.com/apache/mynewt-core).
 
@@ -41,9 +55,9 @@ Feature highlight:
 
 ## Supported hardware
 
-Controller supports Nordic nRF51 and nRF52 chipsets. Host runs on any board
-and architecture [supported](https://github.com/apache/mynewt-core#overview)
-by Apache Mynewt OS.
+Controller supports Nordic nRF51, nRF52 and nRF5340 chipsets as well as DA1469x (cmac)
+from Renesas. Host runs on any board and architecture
+[supported](https://github.com/apache/mynewt-core#overview) by Apache Mynewt OS.
 
 
 ## Browsing
@@ -105,6 +119,16 @@ Implements a simple BLE peripheral that supports the Nordic
 UART / Serial Port Emulation service
 (https://developer.nordicsemi.com/nRF5_SDK/nRF51_SDK_v8.x.x/doc/8.0.0/s110/html/a00072.html).
 
+## External projects using NimBLE
+
+Several other projects provide support for using NimBLE either by [NPL port](https://github.com/apache/mynewt-nimble/tree/master/porting) or forking:
+
+ * [The Espressif ESP-IDF](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/bluetooth/nimble/index.html) contains a NimBLE port for ESP-32 devices.
+ * [The RIOT](https://doc.riot-os.org/group__pkg__nimble.html) operating system contains a package for using NimBLE.
+ * [The Open IOT SDK](https://gitlab.arm.com/iot/open-iot-sdk/sdk) contains a NimBLE [port](https://gitlab.arm.com/iot/open-iot-sdk/sdk/-/tree/main/components/bluetooth) based on [CMSIS RTOSv2](https://www.keil.com/pack/doc/CMSIS/RTOS2/html/index.html), which is an RTOS interface implemented by either Amazon Freertos, CMSIS RTX or Azure ThreadX.
+
+ If you publish a NimBLE port, please let us know to include it here!
+
 # Getting Help
 
 If you are having trouble using or contributing to Apache Mynewt NimBLE, or just
@@ -114,7 +138,7 @@ want to talk to a human about what you're working on, you can contact us via the
 Although not a formal channel, you can also find a number of core developers
 on the #mynewt channel on Freenode IRC or #general channel on [Mynewt Slack](https://mynewt.slack.com/join/shared_invite/enQtNjA1MTg0NzgyNzg3LTcyMmZiOGQzOGMxM2U4ODFmMTIwNjNmYTE5Y2UwYjQwZWIxNTE0MTUzY2JmMTEzOWFjYWZkNGM0YmM4MzAxNWQ)
 
-Also, be sure to checkout the [Frequently Asked Questions](https://mynewt.apache.org/faq/answers)
+Also, be sure to checkout the [Frequently Asked Questions](https://mynewt.apache.org/latest/mynewt_faq)
 for some help troubleshooting first.
 
 # Contributing

src/nimble/RELEASE_NOTES.md

@@ -1,24 +1,20 @@
 # RELEASE NOTES
 
-20 April 2022 - Apache NimBLE v1.5.0
+09 August 2023 - Apache NimBLE v1.6.0
 
 For full release notes, please visit the
 [Apache Mynewt Wiki](https://cwiki.apache.org/confluence/display/MYNEWT/Release+Notes).
 
-Apache NimBLE is an open-source Bluetooth 5.3 stack (both Host & Controller) that completely
+Apache NimBLE is an open-source Bluetooth 5.4 stack (both Host & Controller) that completely
 replaces the proprietary SoftDevice on Nordic chipsets.
 
 New features in this version of NimBLE include:
 
-* Fake dual-mode option for controller
-* LLCP tracing via HCI events
-* Code size optimization for disabled GAP roles
-* Support for PA/LNA
-* LE Secure Connections Only mode
-* Support for Bluetooth Core Specification 5.3
-* Connection subrating
-* BabbleSim support
-* Various bugfixes and improvements
+* Initial support for ISO broacaster
+* Support for Bluetooth Core Specification 5.4
+* FEM antenna control
+* nRF PHY driver unification
+* IPC HCI transport improvements
 
 If working on next-generation RTOS and Bluetooth protocol stack
 sounds exciting to you, get in touch, by sending a mail to the Apache Mynewt

src/nimble/esp_port/esp-hci/esp_nimble_hci.h

@@ -0,0 +1,52 @@
+/*
+ * SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef __ESP_NIMBLE_HCI_H__
+#define __ESP_NIMBLE_HCI_H__
+
+#include "nimble/nimble/transport/include/nimble/transport.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define BLE_HCI_UART_H4_NONE        0x00
+#define BLE_HCI_UART_H4_CMD         0x01
+#define BLE_HCI_UART_H4_ACL         0x02
+#define BLE_HCI_UART_H4_SCO         0x03
+#define BLE_HCI_UART_H4_EVT         0x04
+
+/**
+ * @brief Initialize VHCI transport layer between NimBLE Host and
+ * ESP Bluetooth controller
+ *
+ * This function initializes the transport buffers to be exchanged
+ * between NimBLE host and ESP controller. It also registers required
+ * host callbacks with the controller.
+ *
+ * @return
+ *    - ESP_OK if the initialization is successful
+ *    - Appropriate error code from esp_err_t in case of an error
+ */
+esp_err_t esp_nimble_hci_init(void);
+
+/**
+ * @brief Deinitialize VHCI transport layer between NimBLE Host and
+ * ESP Bluetooth controller
+ *
+ * @note This function should be called after the NimBLE host is deinitialized.
+ *
+ * @return
+ *    - ESP_OK if the deinitialization is successful
+ *    - Appropriate error codes from esp_err_t in case of an error
+ */
+esp_err_t esp_nimble_hci_deinit(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __ESP_NIMBLE_HCI_H__ */