Update IDF to a0468b2 (#2108)

* Update IDF to a0468b2

* add missing ld file

* Fix PIO builds and change coex policy

tools/sdk/include/protocomm/protocomm_ble.h

@@ -0,0 +1,92 @@
+// Copyright 2018 Espressif Systems (Shanghai) PTE LTD
+//
+// 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.
+
+#pragma once
+
+#include <protocomm.h>
+
+/**
+ * BLE device name cannot be larger than this value
+ */
+#define MAX_BLE_DEVNAME_LEN 13
+
+/**
+ * @brief   This structure maps handler required by protocomm layer to
+ *          UUIDs which are used to uniquely identify BLE characteristics
+ *          from a smartphone or a similar client device.
+ */
+typedef struct name_uuid {
+    /**
+     * Name of the handler, which is passed to protocomm layer
+     */
+    char   *name;
+
+    /**
+     * UUID to be assigned to the BLE characteristic which is
+     * mapped to the handler
+     */
+    uint16_t uuid;
+} protocomm_ble_name_uuid_t;
+
+/**
+ * @brief   Config parameters for protocomm BLE service
+ */
+typedef struct {
+    /**
+     * BLE device name being broadcast at the time of provisioning
+     */
+    char         device_name[MAX_BLE_DEVNAME_LEN];
+    uint8_t      service_uuid[16];  /*!< SSID of the provisioning service */
+    ssize_t      nu_lookup_count;   /*!< Number of entries in the Name-UUID lookup table */
+
+    /**
+     * Pointer to the Name-UUID lookup table
+     */
+    protocomm_ble_name_uuid_t *nu_lookup;
+} protocomm_ble_config_t;
+
+/**
+ * @brief   Start Bluetooth Low Energy based transport layer for provisioning
+ *
+ * Initialize and start required BLE service for provisioning. This includes
+ * the initialization for characteristics/service for BLE.
+ *
+ * @param[in] pc        Protocomm instance pointer obtained from protocomm_new()
+ * @param[in] config    Pointer to config structure for initialising BLE
+ *
+ * @return
+ *  - ESP_OK : if successful
+ *  - ESP_FAIL : Simple BLE start error
+ *  - ESP_ERR_NO_MEM : Error allocating memory for internal resources
+ *  - ESP_ERR_INVALID_STATE : Error in ble config
+ *  - ESP_ERR_INVALID_ARG : Null arguments
+ */
+esp_err_t protocomm_ble_start(protocomm_t *pc, const protocomm_ble_config_t *config);
+
+/**
+ * @brief   Stop Bluetooth Low Energy based transport layer for provisioning
+ *
+ * Stops service/task responsible for BLE based interactions for provisioning
+ *
+ * @note    You might want to optionally reclaim memory from Bluetooth.
+ *          Refer to the documentation of `esp_bt_mem_release` in that case.
+ *
+ * @param[in] pc    Same protocomm instance that was passed to protocomm_ble_start()
+ *
+ * @return
+ *  - ESP_OK : For success or appropriate error code
+ *  - ESP_FAIL : Simple BLE stop error
+ *  - ESP_ERR_INVALID_ARG : Null / incorrect protocomm instance
+ */
+esp_err_t protocomm_ble_stop(protocomm_t *pc);